Rozprawy doktorskie: „Structure Infant”

1

Longhi, Elena. "The temporal structure of mother-infant interactions in musical contexts". Thesis, University of Edinburgh, 2003. http://hdl.handle.net/1842/23093.

Pełny tekst źródła

Streszczenie:

The aim of this study is to investigate the nature of temporal structure in mother-infant interactions in musical contexts. Although in the last decade there has been an increase in infant perception of music and maternal singing, little is known about the nature of mother-infant interaction in contexts where mothers sing or play taped music to their infants. This research has several foci: 1) to examine the tempos used by mothers in songs and taped music, as well as the temporal structure of the mothers’ songs, paying particular attention to metrical and phrasing structure; 2) to measure the amount and kinds of behaviours produced by the partners of the dyad during musical interaction, with attention to their level of activity and their cyclical behaviours, as well as their communicative-affective behaviours and the infants’ emotional states and degree of engagement; 3) to analyse the extent and precision of the partners’ synchronisation of their behaviours with self, the musical beat and the other partner; 4) to compare the results of interactions based around songs with those based around taped music. This is an exploratory study which applies a qualitative, micro-analytic observational method to 4 mother-infant dyads: two English-speaking mothers (ES) and two Gaelic-speaking mothers (GS). Two datasets of musical interactions are examined in detail. One includes interactions based around songs and was obtained by asking mothers to sing songs to their 3-4 month-old infants in two contexts: no-touch (where they were asked not to touch their infants) and touch (where they were permitted to touch their infants), and to sing to their 7-8 month-olds in the touch context. The second dataset includes interactions based around taped music and was acquired by asking mothers to play to their 4-5 month-old infants what they considered to be the infant’s favourite music and their own favourite music in two contexts: no-touch and touch. One of the most important discoveries from the thesis is with respect to hierarchical structure. A detailed analysis of the temporal structure of the songs revealed that mothers emphasise the metrical and phrasing structure of their songs, both acoustically through their singing, and behaviourally by synchronising their physical and communicative-affective behaviours with the beats relevant to the temporal structure of the song.

Style APA, Harvard, Vancouver, ISO itp.

2

Abou-Chadi, Fa. "The signal structure of infant long-term epidemiological and physiological records". Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/37914.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

3

Shaabeth, Samar Ali. "Establishing a fluid-structure interaction platform for investigating infant cardiopulmonary resuscitation". Thesis, Cardiff University, 2018. http://orca.cf.ac.uk/114779/.

Pełny tekst źródła

Streszczenie:

Improved knowledge of blood flow during CPR will provide a platform to understand how to optimise chest compression strategies, to maximise the success of this life-critical intervention. Modelling the human circulatory system remains, however, a very difficult and challenging task because of its complexity and heterogeneity, both geometrically and functionally. The work in this thesis presents the simulation process developed for subjectspecific blood flow modelling of porcine left ventricle during a simulated CPR compression. The building of the process chain required for the computations was described. The workflow consists of the fine segmentation of porcine CT data, extraction and processing of the 3D geometrical model, generation of high-quality controlled surface and volume meshes, definition of appropriate physical models, setting of realistic boundary conditions, and finally evaluation of the simulations. Aspects involving the computational stability and material characterisations essential for reliable computations were presented. Further, the integration of the individual steps into ANSYS including automation of the process, optimisation and the individualisation of the simulations, indispensable for a clinical implementation of such a subject-specific system, were described. Subject-specific model velocity profile of the blood flow from the outlet gave a similar velocity profile and magnitude expected from a first compression of the left ventricle in a resting state. Moreover, the velocity obtained from the experimental validation model agreed relatively well with that of the computational model giving the proposed model validity to be used in the investigation of the LV blood flow during compression. The simulated blood viscosity profile agreed strongly with the literature blood non-Newtonian profile. The experimental results of the present physical model agreed relatively well with the data from the computational model regarding the deformation of the structural part along with the velocity magnitude. Despite the fact that the biaxial data showed that the stiffness of the 3D printed material was found to be lower than the tissue in the very low strain rate, the preliminary FSI model material loading during the simulation was more significant for the choice of the hyperelastic material model. The outcomes of this research achieved the aim of implementing a fully coupled FSI method for the design and optimization of a porcine infant left ventricle during a simulated CPR compression. This model is considered a platform for investigating infant CPR chest compression efficacy.

Style APA, Harvard, Vancouver, ISO itp.

4

Mendoza, Jennifer. "Characterizing the Structure of Infants' Everyday Musical Input". Thesis, University of Oregon, 2018. http://hdl.handle.net/1794/23763.

Pełny tekst źródła

Streszczenie:

Infants acculturate to their soundscape over the first year of life (e.g., Hannon & Trehub, 2005a; Werker & Tees, 1984). This perceptual tuning of early auditory skills requires integrating across experiences that repeat and vary in content and are distributed in time. Music is part of this soundscape, yet little is known about the real-world musical input available to infants as they begin learning sounds, melodies, rhythms, and words. In this dissertation, we collected and analyzed a first-of-its-kind corpus of music identified in day-long audio recordings of 6- to 12-month-old infants and their caregivers in their natural, at-home environments. We characterized the structure of this input in terms of key distributional and temporal properties that shape learning in many domains (e.g., Oakes & Spalding, 1997; Roy et al., 2015; Vlach et al., 2008; Weisleder & Fernald, 2013). This everyday sensory input serves as the data available for infants to aggregate in order to build knowledge about music. We discovered that infants encountered nearly an hour of cumulative music per day distributed across multiple instances. Infants encountered many different tunes and voices in their daily music. Within this diverse range, infants encountered consistency, such that some tunes and voices were more available than others in infants’ everyday musical input. The proportion of music produced by live voices varied widely across infants. As infants progressed in time through their days, they encountered many music instances close together in time as well as some music instances separated by much longer lulls. This bursty temporal pattern also characterized how infants encountered instances of their top tune and their top voice – the specific tune and specific voice that occurred for the longest cumulative duration in each infant’s day. Finally, infants encountered many pairs of consecutive music bouts with repeated content – the same unique tune or the same unique voice. Taken together, we discovered that infants’ everyday musical input was more consistent than random in both content and time across infants’ days at home. These findings have potential to inform theory and future research examining how the nature of early music experience shapes infants’ early learning.

Style APA, Harvard, Vancouver, ISO itp.

5

Jubran, Rachel. "Body Part Structure Knowledge in Infancy". UKnowledge, 2016. http://uknowledge.uky.edu/psychology_etds/98.

Pełny tekst źródła

Streszczenie:

Human faces, bodies, and hands convey critical social information (e.g., emotions, goals, and desires). Infants, like adults, are sensitive to such social information. Unlike infants’ knowledge of the structure of the human face and body, not much is known about infants’ knowledge of hands and feet. The current study tested infants for their preference between intact hand images and ones in which the same hands were distorted (i.e., location of at least one finger was altered to distort the typical structure of the hand). Infants at 3.5 months of age had a preference for the reorganized hand image, demonstrating that 3.5-month-olds have sufficient knowledge of the configural properties of hands to discriminate between intact versus distorted images. Furthermore, when the same images were inverted, infants displayed no such preference, indicating that infants were not relying solely on low-level features to detect differences between intact versus reorganized hands. Contrastingly, when shown images of intact and reorganized feet, even 9-month-olds did not exhibit evidence of sensitivity to structural disruptions in images of feet. These results indicate that infants’ structural knowledge of hands, but not necessarily feet, develops along the same trajectory as their knowledge of faces and bodies.

Style APA, Harvard, Vancouver, ISO itp.

6

Dixon, Wallace E. Jr, i P. Hull Smith. "Who's Controlling Whom? Infant Contributions to Maternal Play Behavior". Digital Commons @ East Tennessee State University, 2003. https://doi.org/10.1002/icd.283.

Pełny tekst źródła

Streszczenie:

Because the way mothers play with their children may have significant impacts on children's social, cognitive, and linguistic development, researchers have become interested in potential predictors of maternal play. In the present study, 40 mother–infant dyads were followed from child age 5–20 months. Five-month habituation rate and 13 and 20 month temperamental difficulty were found to be predictive of maternal play quality at 20 months. The most parsimonious theoretical model was one in which habituation was mediated by temperamental difficulty in predicting mother play. Consistent with prior speculation in the literature, these data support the possibility that mothers adjust some aspects of their play behaviors to fit their children's cognitive and temperamental capabilities.

Style APA, Harvard, Vancouver, ISO itp.

7

Munson, Jeffrey A. "Structure and variability in the developmental trajectory of children's externalizing problems : impact of child sex, infant attachment, and maternal depression /". Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/8993.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

8

Sterling, John W. (John Wilson). "Mother-Infant Interaction with Facially Deformed Infants". Thesis, North Texas State University, 1986. https://digital.library.unt.edu/ark:/67531/metadc331799/.

Pełny tekst źródła

Streszczenie:

This study investigated the interactions of facially deformed infants (FD) with their mothers compared to a facially nondeformed control group (FND). All mother-infant dyads were videotaped for 10 minutes during a free play period. Mothers were instructed to spend time with their baby as they normally would. The videotaped interactions of 14 FD dyads and 14 FND dyads were rated by five raters for quality of interactions, amount of vocalization, touch, and face-to-face gaze. The infants were rated on their level of attractiveness from polaroid pictures and videotapes. Mothers also completed a questionnaire which assessed their infants' temperament. Three of the studies' four hypotheses were confirmed. First, the more attractive an infant was, the better his/her interactions with the mother were judged to be. Second, FD infant dyads were rated as significantly poorer in quality of interaction than FND dyads, although FD* dyads did not spend significantly less time vocalizing, touching, or in face-to-face gaze as predicted. A significantly higher percentage of FD infants were judged as having difficult temperament relative to FND infants. Finally, as predicted it was found that infants with difficult temperaments were more likely to exhibit poorer quality interactions than infants with less difficult temperaments. These results have important implications for providing anticipatory guidance to caregivers of FD infants. Without intervention, FD infants appear at risk for subsequent developmental problems stemming from disrupted early mother-infant interactions. Future research should focus on these interactions soon after the infant's birth, attempt to determine if FD infants' emotions can be reliably understood from their facial expressions (as has been found in normal infants) and extend the current research paradigm to include fathers of FD infants.

Style APA, Harvard, Vancouver, ISO itp.

9

Laing, David. "A semiquantitative and qualitative histopathologic assessment of the effect of type II intrauterine growth retardation on the structure of the carotid bodies in fetuses and neonates". Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/25811.

Pełny tekst źródła

Streszczenie:

The major physiological function of the carotid body is to respond to a low partial pressure of oxygen in the systemic arterial blood. The structure and functions of the adult carotid body have been extensively investigated over the past fifteen years. However, the carotid body in children has been relatively neglected with only a handful of studies being performed. To date, no study has been undertaken to investigate the effects of intrauterine hypoxia on the carotid body of foetuses. Clinically, intrauterine growth retardation has been ascribed, amongst other causes, to placental insufficiency that results in chronic hypoxia in the fetus. Intrauterine growth retardation can be divided into two types: - Type I (symmetrical) and type II (asymmetrical). In Type II intrauterine growth retardation, growth retardation does not become clinically evident until the third trimester. There is relative brain sparing with a greater deprivation in the size of abdominal organs, such as the liver and the kidneys. Previous studies have shown that there is no correlation between volume of the carotid body and hypoxia in children. However, Heath et al. made the observation that there are three variants of chief cells (progenitor, light and dark) within the carotid body and that an increase in the relative percentage of the dark subtype is an indicator of hypoxia. Using this observation, the present study set out to test two hypotheses: Firstly, whether the carotid body is functional in utero; and secondly whether there are any objective morphological changes in the carotid bodies of fetuses that have been subjected to intrauterine growth retardation. The carotid bodies from 72 fetuses with a gestational age between thirty and forty weeks were removed from the archived autopsy material, and differential cell counts were performed of the various cells present within the carotid bodies, using haematoxylin and eosin stained sections of the carotid bodies. The cases were assigned to three groups: - I) cases that had clinical and pathological evidence of intrauterine growth retardation, 2) negative controls and 3) positive controls. The three main groups were categorised as follows: -: (1) Intrauterine growth retardation (all cases with a weight for gestational age that is below the tenth centile and a brain to liver ratio of greater than four.) (2) Negative controls (all cases in whom there is a normal weight for age, a brain to liver ratio of less than three and no histological evidence of an episode of significant hypoxia before death). (3) Positive controls (all cases in whom there was clinically significant hypoxia present before death). The groups comprised of: 20 hypoxic positive controls, 15 negative controls, and 16 test cases which had suffered from intrauterine growth retardation. The remaining 21 cases were 7 dysmorphic infants, 3 congenital infection cases (congenital syphilis) and 11 cases that fitted the negative control criteria but had suffered significant hypoxia, thus excluding them from that category. The results showed that no significant difference was present in the percentage of sustentacular cells between any of the three groups. The results of the percentage of dark chief cells were as follows: l) mean percentage of dark chief cells in the intrauterine growth retardation group was 21.1 ±10.9%. 2) mean percentage of dark chief cells in the negative controls was 12.3 ±7.3%. 3) mean percentage of dark chief cells in the positive controls was 21.2 ±9.8%. A significant difference was present between the intrauterine growth retardation cases and the negative controls p=0.013, and between the positive and negative controls p=0.006. The dark chief cell count in the intrauterine growth retardation group showed no significant difference from the positive controls. No age-related difference appeared to be present in any of the groups. The conclusions reached are: a) Clinical hypoxia correlates with morphological changes in the carotid body, manifesting as an increase in the percentage of dark chief cells. b) intrauterine growth retardation cases show similar morphological changes in the carotid body to cases that have suffered from clinical hypoxia. c) therefore, by deduction intrauterine growth retardation fetuses have probably also been exposed to significant hypoxia while in utero. d) the fact that morphological changes in response to hypoxia are occurring in the carotid bodies of fetuses is an indication that the carotid body may be functional in utero. The results of the study indicate that a dark chief cell percentage of greater than 20% indicates that the fetus has been subjected to significant hypoxia, while a percentage of less than 10% indicates that it has not. A percentage of between 10 and 20% is unhelpful in determining whether hypoxia has taken place. The results of this study indicate that histological examination of the carotid bodies in neonates suspected of intrauterine growth retardation could be a useful additional means of assessment.

Style APA, Harvard, Vancouver, ISO itp.

10

Halabi, Amira. "Formules infantiles modèles : relation entre structures protéiques et comportement en digestion". Thesis, Rennes, Agrocampus Ouest, 2020. http://www.theses.fr/2020NSARB340.

Pełny tekst źródła

Streszczenie:

Les traitements thermiques appliqués pendant la fabrication des préparations pour nourrissons (PPNs) peuvent altérer les structures des protéines et donc leur comportement au cours de la digestion. L'objectif de ce projet de thèse était d'étudier la relation entre la structure des protéines au sein de PPNs modèles et leur comportement au cours de leur digestion in vitro.Trois PPNs modèles ont été développées, se différenciant par leur profil en protéines du lactosérum (PS) afin de se rapprocher du profil protéique du lait maternel. Les PPNs, avec différentes teneurs en matière sèche et donc concentration protéique (1.3% ou 5.5%), ont été traitées thermiquement entre 67.5°C et 80°C. La cinétique de dénaturation thermique des PS a été étudiée puis les structures protéiques générées ont été caractérisées pour un même taux de dénaturation des PS (65%).La cinétique de digestion protéique a été évaluée en digestion in vitro statique puis dynamique, simulant les conditions physiologiques du nourrisson.Les résultats ont montré que la cinétique de dénaturation des PS était ralentie pour la PPN proche du lait maternel, de par l’absence de ß-LG et ce indépendamment de la teneur en matière sèche. Pour un même taux de dénaturation des PS, la structure protéique des PPNs variait selon la composition protéique des PPNs, leur teneur en matière sèche et les conditions thermiques, ce qui, in fine, impactait le devenir des protéines au cours de la digestion in vitro.La structure des protéines pourrait donc être un levier pour l’optimisation des PPNs. Ces résultats doivent être complétés par l'évaluation de l'impact physiologique de ces différentes structures
The heat treatments applied during the manufacture of infant milk formulas (IMFs) may alter the protein structures and so their behaviour during digestion. The aim of this PhD project was to study the relationship between protein structure within model IMFs and their behaviour during in vitro digestion.Three model IMFs were formulated, differing only in their whey protein (WP) profile to be as close as possible to the protein profile of human milk. The IMFs, with different dry matter contents and therefore protein concentration (1.3% or 5.5%), were heat-treated between 67.5°C and 80°C. The kinetics of heat-induced WP denaturation were studied, then the protein structures generated were characterised for an identical extent of WP denaturation (65%). The kinetics of protein hydrolysis were evaluated using static then dynamic in vitro digestion methods at the infant stage.The results showed that the denaturation kinetics of WPs were slowed down for IMF close to human milk, due to the absence of ß-LG, regardless of the dry matter content. For an identical extent of WP denaturation, the heat-induced protein structures varied according to the protein profile, the dry matter of IMFs, and the heating conditions, which ultimately impacted the protein behaviour during in vitro digestion.The protein structure could therefore be a lever for the IMF optimisation. These results must be complemented by the evaluation of the physiological impact of these different structures

Style APA, Harvard, Vancouver, ISO itp.

11

Bezerra, Felipa Daiana. "Cuidado neonatal em Sergipe : estrutura, processos de trabalho e avaliação dos componentes do Essential Newborn Care". Universidade Federal de Sergipe, 2017. https://ri.ufs.br/handle/riufs/3821.

Pełny tekst źródła

Streszczenie:

It is understood that the organization of perinatal care, according to the risk approach, implies that every pregnant and newborn are adequately cared for at the level of complexity they need. The purpose of the present study was to describe the structure and processes of care for pregnant women and newborns, including essential neonatal care, in maternity hospitals in the State of Sergipe. It is an integrated cross-sectional study to the research Born in Sergipe: survey about pre - natal, delivery and puerperium, conducted between June 2015 and April 2016 in public, mixed and private hospitals of Sergipe that had performed a minimum of 500 births in 2014, totaling 11 hospitals. Initially, a questionnaire was administered to managers of the eligible units on the existing structure and work processes. Subsequently, a representative number of postpartum women from these hospitals were interviewed and, after discharge, their medical records and those of their newborns were analyzed. The results showed that Sergipe has 78 beds of Neonatal Intensive Care Unit (NICU) and 90 Units of Intermediate Unit (UI) to meet spontaneous and programmed demand. Only six maternity hospitals (54.5%) performed the risk classification, and four (36.3%) had protocols for attending high-risk deliveries. Moreover, regarding components of the Essential Newborn Care corresponding strategies which aim to improve the health of the newborn at different stages, from conception to the postnatal period, only 18% of women had the presence of Companion always for delivery, 41% had skin-to-skin contact early with their child and 33.1% breastfed in the first hour of life. It was observed an adequate distribution of NICU beds between Capital and Interior considering the current legislation, low adherence to protocols of hypertensive and hemorrhagic emergencies; there was low coverage also for the humanization policies, risk rating for the pregnant woman and practices of Essential Newborn Care, especially the skin - to - skin contact and breastfeeding in the first hour of life.
A organização da assistência perinatal, segundo o enfoque de risco, implica que toda gestante e recém-nascido sejam atendidos adequadamente no nível de complexidade que necessitam. O presente estudo teve por objetivo descrever a estrutura e os processos de atendimento à gestante e ao recém-nascido, incluindo os cuidados neonatais essenciais, das maternidades do Estado de Sergipe. Trata-se de um estudo transversal integrado à pesquisa Nascer em Sergipe: inquérito sobre assistência pré-natal, parto e puerpério, realizado entre junho de 2015 e abril de 2016 nas maternidades públicas, mistas e privadas de Sergipe que tiveram pelo menos 500 partos em 2014, totalizando 11 maternidades. Inicialmente foi aplicado um questionário aos gestores das unidades elegíveis sobre a estrutura e os processos de trabalhos existentes. Posteriormente, um número representativo de puérperas desses hospitais foi entrevistado e, após a alta, seus prontuários e os de seus recém-nascidos foram analisados. Os resultados mostraram que Sergipe dispõe de 78 leitos de Unidade de Terapia Intensiva Neonatal (UTIN) e 90 de Unidade Intermediária (UI) para atendimento da demanda espontânea e programada. Somente seis maternidades (54,5%) realizam a classificação de risco e quatro (36,3%) possuem protocolos para atendimento das parturientes de alto risco. Além disso, os componentes do Essential Newborn Care que correspondem a estratégias que têm o objetivo melhorar a saúde do recém-nascido em diferentes estágios, desde a concepção até o período pós-natal, estavam presentes em apenas 18% das mulheres que tiveram a presença do acompanhante em todos os momentos do parto, 41% que tiveram contato pele a pele precoce com seu filho e 33,1% que amamentaram na primeira hora de vida. Observou-se uma distribuição adequada de leitos de UTIN entre Capital e Interior levando-se em consideração a legislação vigente, baixa adesão aos protocolos das emergências hipertensivas e hemorrágicas; houve baixa cobertura também em relação às políticas de humanização, classificação de risco para a gestante e às práticas do Essential Newborn Care, principalmente o contato pele a pele precoce e a amamentação na primeira hora de vida.

Style APA, Harvard, Vancouver, ISO itp.

12

Atkinson, Jessica. "An in-vivo structural MRI investigation of newborn infants' brains : preterm infants and infants born with intrauterine growth restriction". Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/2002304/.

Pełny tekst źródła

Streszczenie:

Introduction: It is well documented that preterm infants are less developed than term infants at term age and infants with IUGR are said to be of higher vulnerability. Fractional Anisotropy (FA) and Apparent Diffusion Coefficient (ADC) are sensitive to micro structural abnormalities and increases in anisotropy associated with premyelination are the earliest indications of the beginning processes of myelination. Furthermore reductions in brain volumes have been found in preterm infants compared to controls and IUGR infants. Thyroxine (T4) is necessary for normal growth and development of the central nervous system. Infants born preterm miss out on the maternal transfer of T4 that occurs during the third trimester and are born with an underdeveloped thyroid gland that is not yet producing sufficient amounts of T4. Method: Sixty nine infants (51 preterm, 9 IUGR and 9 controls) were imaged on a 1.5 Telsa MRI Scanner. DTI analysis was performed using medical imaging software (DTIstudio). FA and ADC maps were used to draw regions of interest around the posterior limb of the internal capsule (PLIC), corpus callosum (CC), frontal lobes (FL) and occipital lobes (OL). The software Brain Voyager QX (version 1.9.10) was used for image realignment and demarcation of T2 Weighted images and the images were analysed using medical imaging software for structure- specific brain volume measurements (Easymeasure). Statistical analysis was conducted with repeated measures ANOVA using SPSS version 18. Results: A significant interaction when investigating anterior vs. posterior structures and laterality of structures with treatment in the frontal lobes and posterior limb of the internal capsule was found suggesting a group difference between infants treated with levothyroxine and those receiving placebo. IUGR infants generally had lower FA and ADC than the control group. Generally lower structural volumes were found in the placebo and IUGR group. Conclusion: Administration of levothyroxine affects the structures on different sides of the brain differently and raises structural volumes. Levothyroxine may be of particular benefit to infants with low levels of thyroxine in their blood (hypothyroxinemia) and male preterm infants. Preterm infants born with intrauterine growth restriction are of higher vulnerability than appropriate for gestational age preterm infants with lower FA, higher ADC and lower structural volumes. Further research is required to fully explore asymmetries in the preterm and IUGR brain and should look at administering levothyroxine to infants with low levels of thyroxine in their blood.

Style APA, Harvard, Vancouver, ISO itp.

13

Pandit, Anand. "Modelling whole-brain structural connectivity in preterm infants". Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/18060.

Pełny tekst źródła

Streszczenie:

Premature birth is a major issue for neurological health. Advances in medical care have led to a decrease in neonatal mortality; however, morbidity in preterm survivors remains substantial and neurocognitive issues, particularly involving cognition, language and behaviour are prevalent. Cerebral white matter injury is common in preterm-born infants and is associated with neurocognitive impairments. By identifying the pattern of connectivity changes in the brain following premature birth a more comprehensive understanding of the neurobiology underlying these deficits could be obtained. Whole-brain macrostructural connectivity was characterised in a group of preterm-born children, and the influence of age and prematurity was explored using a data-driven analysis of diffusion magnetic resonance imaging data. An age-adapted framework, combining anatomical and tissue segmentations with probabilistic diffusion tractography, was used to derive connectivity matrices, weighted by mean tract anisotropy: a measure of connective certainty and strength. In a sparsified, group-consistent connectivity matrix, a novel feature selection method comprising Lasso regression and stability selection was used to identify connections whose mean anisotropy was related to age at imaging or delivery. As hypothesised, older children were found to have greater connectivity in tracts involving frontal or temporal lobe structures. Increasing prematurity at birth was related to widespread, bilateral reductions in connectivity in all cortical lobes and several sub-cortical structures, consistent with previous histological and neuroimaging data. Results were robust to both increasing sparsity and the removal of subjects with serial imaging in the cohort. The pattern of white matter damage elicited in these results may be responsible for the neurocognitive impairments observed. This thesis presents a scalable, data-driven method, which could detect contrasting effects of development and prematurity in a sparse model of infant whole-brain structural connectivity. The approach can be used to evaluate connectivity in ever-increasing detail and undertake iterative discovery of the macroconnectome with increasing precision.

Style APA, Harvard, Vancouver, ISO itp.

14

Stauffer, Robin James. "A comparative analysis of the Army Special Forces support structure to the Infantry Division (Light) support structure". Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA243708.

Pełny tekst źródła

Streszczenie:

Thesis (M.S. in Management)--Naval Postgraduate School, December 1990.
Thesis Advisor(s): Moore, Thomas F. Second Reader: Sturm, Mark. "December 1990." Description based on title screen as viewed on March 29, 2010. DTIC Descriptor(s): Logistics Support, Battalion Level Organizations, Army Personnel, Combat Support, Infantry, Efficiency, Theses, Nodes, Planning, Command And Control Systems, Supports, Division Level Organizations, Army, Army Operations, Unconventional Warfare, Channels, Organizations. DTIC Identifier(s): Special Operations Forces, Command And Control Systems, Army Operations, Combat Services Support, Logistics Management, Special Operations Support Command, Light Infantry Divisions, Military Organizations, Theses. Author(s) subject terms: Army Special Operations Forces, ARSOF, Combat Services Support, CSS, Logistics, Special Operations Support Command, SOSCOM. Includes bibliographical references (p. 117-118). Also available in print.

Style APA, Harvard, Vancouver, ISO itp.

15

Grau, Olivares Marta. "Neuropsychological and structural brain correlates of lacunar infarcts". Doctoral thesis, Universitat de Barcelona, 2008. http://hdl.handle.net/10803/2714.

Pełny tekst źródła

Streszczenie:

L’infart cerebral és la segona causa de mort, així com d’incapacitació a nivell mundial (Di Carlo et al.,2000), essent responsable de múltiples seqüeles físiques i cognitives, incloent la demència. L’infart cerebral es caracteritza per una simptomatologia neurològica focal i sobtada en consonància amb la localització topogràfica de la lesió cerebral, un cop s’han exclòs altres possibles causes. La demència vascular (DV) històricament s’ha basat en el model de demència multi-infart (Erkinjuntti et al.,2002), tot i que cada vegada hi ha una major evidència de que diferents patologies vasculars (malaltia vascular subcortical de petit vas o infarts llacunars), així com infarts corticals, poden contribuir a desenvolupar-la (Hachinski et al.,1974; Esiri et al.,1997; Rockwood et al.,1999; Erkinjuntti et al.,1999; Pohjasvaara et al.,2000; Ballard et al.,2000). L’objectiu d’aquesta recerca és l’estudi del perfil neuropsicològic i dels dèficits cognitius associats a la malaltia vascular cerebral de petit vas (infarts llacunars i lesions de la substància blanca), així com l’evolució d’aquests pacients després de 2 anys d’haver patit l’event vascular. Aquest tema mereix especial interès perque la malaltia vascular subcortical de petit vas és una de les causes més comunes de demència vascular (DV), i el fet de poder conèixer el seu estat prodròmic i poder previndre els principals factors de risc, ens podrien fer possible el desenvolupament d’estratègies preventives. Aquesta àrea d’estudi també mereix atenció perque s’han fet molts estudis sobre l’evolució i les seqüeles cognitives en els infarts isquèmics de gran vas, però no hi ha gaire evidència sobre l’efecte d’un primer ILL i l’evolució a llarg terme d’aquests pacients. Finalment, no hi ha estudis a la literatura sobre el perfil neuropsicològic de les diferents síndromes llacunars (segons Miller-Fisher) i la seva evolució a llarg terme.

Style APA, Harvard, Vancouver, ISO itp.

16

Thia, L. P. "Lung function and structure in Cystic Fibrosis infants one year after diagnosis by newborn screening". Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1454071/.

Pełny tekst źródła

Streszczenie:

Identifying early signs of lung disease reliably in asymptomatic infants with Cystic Fibrosis (CF) diagnosed by newborn screening (NBS) is a challenge. Very little is known about the origin and progression of lung disease in these infants hence there is uncertainty on best interventions to protect the lungs of these infants from functional and structural decline. This collaborative observational study aims to assess lung function and structure in CF NBS infants. Lung function tests (LFT) were performed in contemporaneous healthy controls and CF infants at 3 months and a year of age. In addition, CF infants underwent chest computed tomography (CT) at 1 year under general anaesthesia within 2 weeks of the LFTs. At a year, CF NBS infants had impaired lung function compared to contemporaneous healthy controls. However the percentage of CF NBS infants demonstrating what was considered abnormal lung function had reduced at a year of age compared to those with abnormal result at 3 months. Although some improvements were observed at 1- year LFTs, this was not universal using the different techniques. Some measurements improved, others remained stable and certainly none deteriorated. In terms of CT structural changes in CF NBS infants, fewer abnormalities were detected in our cohort compared to other reported studies and changes seen were mild. There was poor correlation between lung function and structure in this group of CF infants. To accurately detect CF infants with impaired lung function or structural abnormalities using important physiological and clinical determinants would play an important role in the management of these infants. This study could inform power calculation for future interventional studies using relevant clinical trial endpoints related to lung function and structure.

Style APA, Harvard, Vancouver, ISO itp.

17

Benembarek, Abdeljalil. "Réponse dynamique d'une fondation à geometrie arbitraire dans un milieu semi-infini et contrôle actif des structures avec prise en compte du couplage sol-structure". Ecully, Ecole centrale de Lyon, 1993. http://bibli.ec-lyon.fr/exl-doc/TH_T1534_abenembarek.pdf.

Pełny tekst źródła

Streszczenie:

II est un fait indéniable que, dans le vaste domaine du génie civil, l'ingénieur doit faire face en permanence à une panoplie de contraintes. Celles-ci sont généralement d'ordre économique, de confort, de fiabilité et de sécurité. Si elles sont plutôt simples à énumérer, il n'est en revanche pas aisé de les respecter et, pour le comprendre, un simple coup d'oeil sur la littérature consacrée à la question suffit à réaliser l'ampleur du problème. D'un autre coté, il est essentiel de le noter, cela témoigne aussi de l'effort colossal entrepris par les chercheurs pour tenter d'apporter des solutions satisfaisantes, même si c'est parfois au détriment de la simplicité. De nombreux concepts sont ainsi nés, parmis lesquels le contrôle actif semble prendre de plus en plus d'ampleur, en s'imposant comme un moyen de contrôle efficace. II nous semble intéressant de l'adopter et important d'y greffer une nouvelle contrainte: la prise en compte du couplage sol-structure. Trois études seront donc faites pour mieux cerner la question: 1-Le contrôle actif des structures, afin d'en mettre en évidence l'efficacité. 2-La réponse dynamique d'une fondation dans un milieu semi-infini, en l'occurrence le sol. Nous proposerons et validerons deux nouvelles méthodes dont les avantages ne manqueront pas, nous l'espérons, de vous intéresser. 3-Le contrôle actif avec prise en compte du couplage sol-structure. La réalisation de ces trois études a exigé l'élaboration et la validation d'un code de calcul par la méthode des élements finis tridimensionnels, intégrant le concept de sous-structuration
It is now a reality that in the vasteness of the civil engineering discipline, the engenier has to contend with a multiplicity of constraints. This generally relates to economics, confortability, reliability and security. Although these setbacks seem simple to enumerate, their strict application and a quick glance at the availible literature is enough to give a good idea of the complexity of the problem. To arrive at satisfactory solutions a colossal effort has been made by researchers on the field even though sometimes to the detriment of simplicity. A good number of concepts have been proposed amongst which the theorie of active control is now gaining much ground as an efficient control tool. It is thus interesting for adoption and adding a new constraint (soil-structure coupling) becomes important. Three studies would thus be undertaken to better identify the relevant problems called into play:1-structural active control to highlight its efficiency,2-the dynamic response of a foundation in a semi infinite medium (soil). Two new methods shall be proposed and validated. 3-active control taking into account soil-structure couplings. The realisation of these three studies necessitated the elaboration and validation of a calculation code based on the three dimensional finite element method, integrating the concept of sub-structuration

Style APA, Harvard, Vancouver, ISO itp.

18

Johansson, Daniel. "Counterinsurgency, Consequences for Swedish and Austrian Infantry Companies’ Organization". Thesis, Försvarshögskolan, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-6317.

Pełny tekst źródła

Streszczenie:

This thesis explores organizational features, which facilitate counterinsurgency operations on a company level. The framework used is the infantry company. Two factors were found through literature studies to be extra important for conducting successful counterinsurgency operations: intelligence and presence. Regarding intelligence, the results show beneficial effects from organizing a company level intelligence cell. The recommended size is three individuals. The next factor, presence, originates from the concept of maintaining a persistent presence as opposed to conducting raids in the assigned area of operations. Here, a force structure of four subordinates at both company and platoon level was found to be effective. Further, a Swedish and an Austrian European Union Battlegroup company was studied and compared to each other from the previously found aspects. Next, the two companies receive suggestions for how to reorganize themselves with the already existing personnel and equipment available. In the final part, the thesis discusses the structural rigidity of military organizations evident in the lack of organizational adaption to counterinsurgency even though such operations have been conducted in the past, present and most certainly will be a part of the future.

Erasmus

Received award for best thesis.

Style APA, Harvard, Vancouver, ISO itp.

19

Jubran, Rachel Lynn. "BODY PROCESSING AND ATTENTIONAL PATTERNS IN INFANCY". UKnowledge, 2019. https://uknowledge.uky.edu/psychology_etds/162.

Pełny tekst źródła

Streszczenie:

Bodies provide important social information, and adults benefit from this information by recognizing and responding appropriately to bodies. Body recognition is enabled by the fact that human bodies are defined by parts, such as the limbs, torso, and head, arranged in a particular configuration. To understand the development of social cognition, it is important to analyze and document how infants come to recognize bodies. Infants are sensitive to distortions to the global configurations of bodies by 3.5 months of age, suggesting an early onset of body knowledge. It was unclear, however, whether such sensitivity indicates knowledge of the location of specific body parts or solely reflects sensitivity to the overall gestalt or outline of bodies. The current study addressed this by examining whether infants attend to specific locations in which parts of the body have been reorganized. Results of Experiments 1 and 2 show that 5-month-olds, but not 3.5-month-olds, are sensitive to the location of specific body parts, as demonstrated by a difference in allocation of attention to the body joint areas that were normal (e.g., where the arm connects to the shoulder) versus ones that were reorganized. Furthermore, to examine whether this kind of processing is driven by information from the face/head, in Experiment 3 I tested infants on images in which the face/head was removed. Infants no longer exhibited differential scanning of normal versus reorganized bodies. To further assess whether infants were responding to critical information provided by the face/head or whether their processing was disrupted solely because the headless images were incomplete bodies, Experiment 4 examined infants’ performance on body images missing limbs. Once again, infants failed to exhibit differential scanning of typical versus reorganized bodies. Together, these results suggest that 5-month-olds are sensitive to the location of body parts. However, the presence of the face/head (Experiment 3) and limbs (Experiment 4) are necessary for 5-month-olds to exhibit differential scanning of reorganized versus intact body images. Overall, by 5 months of age, infants are sensitive to precise locations of body parts, and thus demonstrate a rather sophisticated level of knowledge about the structure of the human body. The role that the face/head and limbs play in body structure knowledge development is still unclear, and future studies need to address this question.

Style APA, Harvard, Vancouver, ISO itp.

20

Nussbaum, Jeannette. "Embryonic stem cells for myocardial infarct repair /". Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/6312.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

21

Miller, Robin June. "Stability, structure, and effects of perinatal morbidity on temperament from infancy to adolescence /". View online ; access limited to URI, 2007. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3292102.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

22

Robu, Bogdan. "Active vibration control of a fluid/plate system". Phd thesis, Toulouse 3, 2010. http://thesesups.ups-tlse.fr/1103/.

Pełny tekst źródła

Streszczenie:

Cette thèse s’intéresse au problème du contrôle actif des vibrations structurelles d’une aile d’avion induites par le ballottement du carburant dans les réservoirs qu’elle contient. L'étude proposée ici est concentrée sur l'analyse d'un dispositif expérimental composé d'une longue plaque rectangulaire en aluminium équipée d'actionneurs et de capteurs piézoélectriques et d'un réservoir cylindrique. La difficulté principale réside dans le couplage complexe entre les modes de vibration de l’aile et les modes de ballottement du liquide. Un modèle de ce dispositif à l’aide d’équations aux dérivées partielles est tout d’abord construit. Ce modèle de dimension infinie couple une équation des plaques avec l'équation de Bernoulli pour le mouvement du fluide dans le réservoir. En analysant la contribution énergétique des modes, une approximation en dimension finie, de type espace d'état est alors construite. Après une méthode de recalage fréquentiel du modèle, un contrôle est réalisé en utilisant dans un premier temps une méthode par placement de pôle et dans un deuxième temps, la théorie de la commande robuste H-infini. La dimension du modèle et les performances demandées imposent le calcul d’un contrôleur H-infini d'ordre réduit, conçu en utilisant la librairie HIFOO 2. 0 et testé sur le dispositif expérimental pour différents niveaux de remplissage. Finalement, le problème de la correction simultanée avec un correcteur HIFOO d'ordre réduit est aussi analysé
We consider the problem of the active reduction of structural vibrations of a plane wing induced by the sloshing of large masses of fuel inside partly full tank. This study focuses on an experimental device composed of an aluminum rectangular plate equipped with piezoelectric actuators/sensors at the clamped end and with a cylindrical tip-tank, more or less filled with liquid, at the opposite free end. The control is performed through piezoelectric actuators and the main difficulty comes from the complex coupling between the flexible modes of the wing and the sloshing modes of the fuel. First, a partial derivative equation model is computed by coupling a plate equation with a Bernoulli equation for the fluid motion. After analyzing the energetic contribution of each mode, a state space approximation is established. After a model matching procedure, a control is computed by using the pole placement method and the H-infinity theory. Due to the large scale of the synthesis model and to the simultaneous performance requirements, a reduced-order H-infinity controller is computed using the HIFOO 2. 0 package and tested on the experimental device for different filling levels. Finally, the problem of simultaneous control with a reduced order HIFOO controller is tackled. Experimental results of this non-convex optimization problem are given and commented

Style APA, Harvard, Vancouver, ISO itp.

23

Kim, Ki Hwan. "ROK Army manpower force structure validation of organizational (Officer, NCO, and Enlisted Personnel) staffing of an infantry battalion". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Mar%5FKim.pdf.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

24

Jubran, Rachel, Hannah White, Alyson Chroust, Alison Heck i Ramesh S. Bhatt. "Experimental Evidence of Structural Representation of Hands in Early Infancy". Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/2731.

Pełny tekst źródła

Streszczenie:

Hands convey important social information, such as an individual’s emotions, goals, and desires, are used to direct attention through pointing, and are a major organ for haptic perception. However, very little is known about infants’ representation of human hands. In Experiment 1, infants tested in a familiarization/novelty preference task discriminated between images of intact hands and images that contained first-order structure distortions (i.e., with locations of fingers altered to result in an unnatural configuration). In Experiment 2, infants tested in a spontaneous preference task exhibited a preference for scrambled hand images over intact images, indicating that 3.5-month-olds have gained sufficient sensitivity to the configural properties of hands to discriminate between intact versus scrambled images without any training in the laboratory. In both procedures, infants’ performance was disrupted by the inversion of images, suggesting that infants’ performance in upright conditions was not based on low-level features. These results indicate that sensitivity to the structure of hands develops early in life. This may lay the foundation for the development of the functional use of hand information for social communication.

Style APA, Harvard, Vancouver, ISO itp.

25

Finch, Brian Karl. "Structural determinants of infant/child health : investigating the causes and consequences of substance use as a proximal risk factor /". Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

26

Pereira, da Cruz Benetti Lucia. "An Analysis of Pitch Structures in Song Melodies in One Infant’s Music Environment". The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1590962678868372.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

27

Laporte, Chervin F. P., Facundo A. Gómez, Gurtina Besla, Kathryn V. Johnston i Nicolas Garavito-Camargo. "Response of the Milky Way's disc to the Large Magellanic Cloud in a first infall scenario". OXFORD UNIV PRESS, 2018. http://hdl.handle.net/10150/626276.

Pełny tekst źródła

Streszczenie:

We present N-body and hydrodynamical simulations of the response of the Milky Way's baryonic disc to the presence of the Large Magellanic Cloud during a first infall scenario. For a fiducial Galactic model reproducing the gross properties of the Galaxy, we explore a set of six initial conditions for the Large Magellanic Cloud (LMC) of varying mass which all evolve to fit the measured constraints on its current position and velocity with respect to the Galactic Centre. We find that the LMC can produce strong disturbances - warping of the stellar and gaseous discs - in the Galaxy, without violating constraints from the phase-space distribution of stars in the Solar Neighbourhood. All models correctly reproduce the phases of the warp and its antisymmetrical shape about the disc's mid-plane. If the warp is due to the LMC alone, then the largest mass model is favoured (2.5 x 10(11) M-circle dot). Still, some quantitative discrepancies remain, including deficits in height of Delta Z = 0.7 kpc at R = 22 kpc and Delta Z = 0.7 kpc at R = 16 kpc. This suggests that even higher infall masses for the LMC's halo are allowed by the data. A comparison with the vertical perturbations induced by a heavy Sagittarius dSph model (10(11) M-circle dot) suggest that positive interference with the LMC warp is expected at R = 16 kpc. We conclude that the vertical structure of the Galactic disc beyond the Solar Neighbourhood may jointly be shaped by its most massive satellites. As such, the current structure of the Milky Way suggests we are seeing the process of disc heating by satellite interactions in action.

Style APA, Harvard, Vancouver, ISO itp.

28

Weaver, David. "Norm-referenced construct validation of the Adaptive Behavior Scale for Infants and Early Childhood (ABSI) using covariance structure modeling (LISREL) /". The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487266362339311.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

29

Bourque, Amanda. "Ecosystem structure in disturbed and restored subtropical seagrass meadows". FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/792.

Pełny tekst źródła

Streszczenie:

Shallow seagrass ecosystems frequently experience physical disturbance from vessel groundings. Specific restoration methods that modify physical, chemical, and biological aspects of disturbances are used to accelerate recovery. This study evaluated loss and recovery of ecosystem structure in disturbed seagrass meadows through plant and soil properties used as proxies for primary and secondary production, habitat quality, benthic metabolism, remineralization, and nutrient storage and exchange. The efficacy of common seagrass restoration techniques in accelerating recovery was also assessed. Beyond removal of macrophyte biomass, disturbance to seagrass sediments resulted in loss of organic matter and stored nutrients, and altered microbial and infaunal communities. Evidence of the effectiveness of restoration actions was variable. Fill placement prevented additional erosion, but the resulting sediment matrix had different physical properties, low organic matter content and nutrient pools, reduced benthic metabolism, and less primary and secondary production relative to the undisturbed ecosystem. Fertilization was effective in increasing nitrogen and phosphorus availability in the sediments, but concurrent enhancement of seagrass production was not detected. Seagrass herbivores removed substantial seagrass biomass via direct grazing, suggesting that leaf loss to seagrass herbivores is a spatially variable but critically important determinant of seagrass transplanting success. Convergence of plant and sediment response variables with levels in undisturbed seagrass meadows was not detected via natural recovery of disturbed sites, or through filling and fertilizing restoration sites. However, several indicators of ecosystem development related to primary production and nutrient accumulation suggest that early stages of ecosystem development have begun at these sites. This research suggests that vessel grounding disturbances in seagrass ecosystems create more complex and persistent resource losses than previously understood by resource managers. While the mechanics of implementing common seagrass restoration actions have been successfully developed by the restoration community, expectations of consistent or rapid recovery trajectories following restoration remain elusive.

Style APA, Harvard, Vancouver, ISO itp.

30

Severino, Ana Cristina Fernandes. "Produção de sucedâneos de gordura de leite humano a partir de tripalmitina e de óleo de grainha de uva catalisada por lipases imobilizadas". Master's thesis, ISA/UL, 2014. http://hdl.handle.net/10400.5/7406.

Pełny tekst źródła

Streszczenie:

Mestrado em Engenharia Alimentar - Processamento dos Alimentos - Instituto Superior de Agronomia
The aim of this study was the production of human milk fat substitutes (HMFS) by acidolysis of tripalmitin with free fatty acids (FFA) from grapeseed oil, in solvent-free media, catalyzed by sn-1,3 selective lipases. The commercial immobilized lipase from Rhizomucour miehei, Lipozyme RM IM and the recombinante Ryzopus oryzae lipase (rROL) immobilized on two different supports (Lewatit® VPOC 1600 and Sepabeads) were tested as biocatalysts. After 24h acidolysis at 60ºC and using a molar ratio (MR) tripalmitin/FFA of 2:1, molar incorporations of 20.5%, 19.8% and 14.4% of FFA in tripalmitin were achieved with immobilized rROL in Lewatit, in Sepabeads or with Lipozyme RMIM, respectively. rROL in Lewatit was selected for subsequent studies, due to its higher mechanical resistance to magnetic stirring. The activity of rROL immobilized on Lewatit increased with its initial water activity (aw). The highest molar incorporation of 20.5%, was observed at an aw of 0.95. Modeling and optimization of reaction conditions (temperature and MR) of acidolysis were performed by response surface methodology (RSM). The highest molar incorporation were obtained at lower temperatures and molar ratios (T=58ºC; MR=2:1). The rROL showed to be a feasible biocatalyst to produce HMFS

Style APA, Harvard, Vancouver, ISO itp.

31

Lopez, Littleton Vanessa A. "An ecological analysis of social and economic influences on black and white infant mortality risk in Orange County, FL". Doctoral diss., University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4788.

Pełny tekst źródła

Streszczenie:

Black health disparities are a salient public health issue with blacks in every socioeconomic level at a greater health disadvantage than their white counterparts. In particular, disparity in infant mortality rates between blacks and whites have widened in recent decades to differentials never before experienced in the United States. Social ecologists investigating the myriad of individual and environmental risk factors have failed to fully account for the persistent differential. This study examines the relationships between individual and environmental influences on the health risk experienced by blacks, whites, as well as the differential between the two populations. This multi-level analysis was conducted using five-year aggregate data centering on the 2000 decennial census (1998 - 2002) as the most recent census data available. During the study period, the 193 census tracts in Orange County, Florida, experienced 504 infant deaths which included 242 black and 241 white infant deaths. Using the infant mortality target rate developed for Healthy People 2000 as the "normal" infant mortality rate, risk was calculated as the percentage of deviation from the (")normal("). A rate was also calculated to demonstrate the difference between black and white percent deviations from the "normal". Structural equation modeling was used to examine the relationship between socioeconomic influences (Socioeconomic Disadvantage), social risk factors (Social Disorganization), and behavioral risk factors (Poor Behavioral Choices) using a latent variable approach based on a conceptual model which integrated the social determinants of health framework and conflict theory. In this study, an inverse association was found between socioeconomic disadvantage and infant mortality risk for black infants.; This finding is contradictory to the expected finding and may have been due to multicollinearity or the operationalization of the endogenous study variable for black infant mortality risk. Thus, this study highlights the complexity of unraveling the interrelationship between social and economic risk factors. The results of this study demonstrate the importance of the latent variable approach in public health research as well as the need to broaden the approach to selecting indicators. This study concludes with specific policy recommendations aimed at improving the health outcomes of vulnerable populations using the social determinants of health framework.
ID: 030646194; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (Ph.D.)--University of Central Florida, 2011.; Includes bibliographical references (p. 172-190).
Ph.D.
Doctorate
Health and Public Affairs
Public Affairs

Style APA, Harvard, Vancouver, ISO itp.

32

Nguyen, Thanh Hien. "Structure and functioning of the benthic communities in the extreme dynamic intertidal mudflats along the Guianas coasts : trophic fate of the infauna". Thesis, La Rochelle, 2018. http://www.theses.fr/2018LAROS009/document.

Pełny tekst źródła

Streszczenie:

Entre les fleuves Amazone et Orénoque, la frange côtière atlantique de l’Amérique du Sud (1500 km) est considérée comme la plus vaseuse au monde, conséquence des apports de sédiments en suspension de l’Amazone. Malgré la forte variabilité et l’instabilité de ces vasières uniques au monde, elles apparaissent comme des écosystèmes très productifs et sont des habitats clés dans l’accomplissement du cycle de vie des espèces de poissons et d’oiseaux qui les exploitent. Cependant, les connaissances sur les communautés biologiques qui y sont associées restent au niveau exploratoire. Ce travail de thèse vise donc à décrire la structure de l’endofaune benthique intertidale des vasières guyanaises et à définir son fonctionnement dans des environnements vaseux tropicaux très instables. Comme prévu, la forte instabilité des sédiments a entraîné une très faible diversité des assemblages de la macrofaune et de la méiofaune. Néanmoins, les communautés benthiques des vasières guyanaises ont montré une abondance remarquablement élevée avec la dominance d'espèces opportunistes de petites tailles. 39 taxons de la macrofaune ont été trouvés tandis que la méiofaune était moins diversifiée avec la présence de 34 taxons. Le tanaidacée Halmyrapseudes spaansi et le polychète Sigambra grubii sont les deux espèces de macrofaune les plus abondantes, largement réparties le long de la côte guyanaise. De même, le nématode Pseudochromadora spp., suceur d’épistrate, et Halomonhystera sp. 1 (non deposit feeders) étaient les deux espèces de méiofaune les plus abondantes sur chacune des stations. La distribution des communautés benthiques sont spécifiques aux sites d’étude et varie saisonnièrement. Les assemblages en zone estuarienne (Sinnamary) étaient plus diversifiées que dans la zone de vasière nue (Awala), alors que les abondances des communautés benthiques étaient toujours plus élevées en saison humide qu’en saison sèche. Les facteurs abiotiques et biotiques ont influencé significativement les communautés benthiques. Néanmoins, les changements dans la structure de la communauté benthique induits par la disponibilité des sources alimentaires (chl a) et la pression de prédation étaient tout aussi importantes que les variations des assemblages imposées par les paramètres abiotiques (teneur en eau, salinité ...). En particulier, une forte corrélation a été trouvée entre la méiofaune et le microphytobenthos. Les mesures isotopiques de différents compartiments des vasières ont non seulement révélé le rôle central du microphytobenthos dans la composition du régime alimentaire de la méiofaune, mais ont également montré l'importance écologique de la méiofaune comme principale source de nourriture pour les petits oiseaux limicoles et les poissons côtiers. La méiofaune et le microphytobenthos rentrent dans le régime alimentaire de trois poissons côtiers en grande proportion, alors que les oiseaux limicoles migrateurs présentaient une plus grande diversité de proies. Cependant, la contribution relative des tanaidacées dans le régime alimentaire des oiseaux limicoles était étonnamment faible. Le travail de thèse a permis d'améliorer notre compréhension de la structure de l’endofaune benthique intertidale des vasières guyanaises et de définir son fonctionnement dans des environnements vaseux tropicaux très instables. Ce travail a permis de construire, pour la première fois, un modèle conceptuel de réseau trophique des vasières intertidales mobiles guyanaises
Locating between the Amazon and Orinoco Rivers, the 1500 km-long Atlantic coastline of South America are considered as the muddiest areas in the world due to the large discharge of suspended sediment from the Amazon. Despite the extreme morphodynamics of these ecosystems, the Guianas mudflats are important feeding zones for many shorebirds and fish. However, the state of knowledge on benthic organisms associated with these highly unstable environments is still at an exploratory stage. This study, therefore, aims to describe the structure and dynamics of the intertidal benthic infauna in the Guianas mudflats and to define its functioning in such highly unstable tropical muddy environments. As expected, the high instability of the sediment resulted in very low diversity of both macrofauna and meiofauna assemblages. Nonetheless, the infauna communities of the Guianas mudflats showed remarkably high abundance with the predominance of small-sized opportunistic species. A total of 39 operational taxonomic units of macrofauna was recorded while meiofauna was less diverse with the occurrence of 34 taxa. The tanaid Halmyrapseudes spaansi and the polychaeta Sigambra grubii are the two most abundant macrofauna species, which widely distributed along the Guianas coast. Likewise, the nematodes epistrate feeder Pseudochromadora spp. and non-deposit feeders Halomonhystera sp. 1 were the principal components of meiofauna communities in every station. The distribution patterns of the infauna were both site-specific and seasonal variation. The assemblages in estuarine habitat were more diverse than in the bare mudflat habitat, while infauna abundances in the WS were always higher than in the DS. Both abiotic and biotic factors significantly influenced the benthic communities. Nevertheless, the changes in benthic community structure induced by food source availability (chl a) and predation pressure were more prominent than the assemblage variations imposed by abiotic parameters (mud content, salinity…). Particularly, the tight coupling between meiofauna and MPB was observed in both distribution patterns and trophic structures. The isotopic measurements of different intertidal compartments not only revealed the pivotal role of MPB on structuring meiofaunal coummunities, but also indicated the ecological importance of meiofauna as the main food source for the small shorebirds and coastal fish. Meiofauna and MPB entered the diet of three coastal fish in great proportion, whereas the migrating shorebirds showed a wider diet breadth. The isotopic ratios were perfectly matched with the feeding guilds assigned by morphological features. However, the relative contribution of tanaids to the top epibenthic predators were surprisingly lower than expected. The thesis has increased our understanding of the Guianas infauna communities, and revealed for the first time a conceptual food web model of these unique intertidal mudflats

Style APA, Harvard, Vancouver, ISO itp.

33

Noronha, Fernanda Silva. "Animês e mangás: o mito vivo e vivido no imaginário infantil". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/48/48134/tde-17122013-152946/.

Pełny tekst źródła

Streszczenie:

Animês e mangás: o mito vivo e vivido no imaginário infantil é uma análise hermenêutico-figurativa do mangá Naruto. O trabalho procura lançar questões sobre a importância da figura do herói do mangá shonen nos processos iniciáticos de crianças e adolescentes estudantes da rede pública paulistana. Para tanto, apoia-se, sobretudo, na teoria do imaginário de Gilbert Durand e da jornada do herói de Joseph Campbell. A pesquisa que teve como corpus de análise a primeira temporada do mangá Naruto e o animê de mesmo título, as produções imagéticas dos estudantes e as diferentes versões de narrativas tradicionais japonesas extraídas de sites otakus e de livros infanto-juvenis sustenta a ideia de que mangás são derivações, por empobrecimento, de mitos japoneses, que enformam as produções imagéticas dos apreciadores desse gênero literário. Com efeito, e por meio do método de convergência simbólica, a análise destaca o simbolismo ambíguo das figuras da raposa e dos meninos-heróis, recorrentes nas narrativas tradicionais e na iconografia japonesa. Importante ressalva é indicar não se tratar de uma abordagem comparativa entre a cultura japonesa e as culturas ocidentais que convivem com este gênero literário. A conclusão a que se chega ao final deste estudo é que o mangá Naruto constitui uma literatura iniciática que presentifica o arquétipo do herói no imaginário infantil e apresenta valor heurístico para pensarmos a construção de uma pedagogia do psiquismo imaginante proposta por Bruno Duborgel, assim como a dinâmica do imaginário de nossa própria época.
Animes and mangas: the living and lived myth in childhood imagination is an hermeneutic-figurative analysis of the Naruto manga, that launches questions about the importance of the shonen manga hero figure in the initiatory processes of children and adolescents students of São Paulo public schools network. For that, it relies, mainly, in the imaginary theory of Gilbert Durand and in the hero journey of Joseph Campbell. The research which had as its analysis corpus the first season of Naruto manga and the anime with the same title, the imagistic productions of students and the different versions of traditional Japanese narratives extracted from otakus sites and books for children and teenagers supports the idea that mangas are derivations by impoverishment of Japanese myths that shape the imagistic productions of enthusiasts of this literary genre. In effect, and by means of the symbolic convergence method, the analysis highlights the ambiguous symbolism of the fox and boy-heroes figures, recurrent in traditional narratives and in the Japanese iconography, although it is not to be confused with an eminently comparative approach between the Japanese culture and occidental cultures that coexist with this literary genre. The conclusion reached at the end of this study is that the Naruto manga constitutes an initiatory literature that makes present the hero archetype in the childhood imagination and that has an heuristic value to make us think about the construction of a pedagogy of imaginative psyche proposed by Bruno Duborgel, as well as the dynamics of our own epochs imaginary.

Style APA, Harvard, Vancouver, ISO itp.

34

Sánchez, Jesús. "About E-infinity-structures in L-algebras". Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC204/document.

Pełny tekst źródła

Streszczenie:

Dans cette thèse nous rappelons la notion de L-algèbre, qui a pour objet d'être un modèle algébrique des types d'homotopie. L'objectif principal de cette thèse est la description d'une structure de E-infini-coalgèbre sur l'élément principal d'une L-algèbre. Ceci peut être vu comme une généralisation de la structure de E-infini-coalgèbre sur le complexe des chaînes d'un ensemble simplicial, telle que décrite par Smith dans Iterating the cobar construction, 1994. Nous construisons une E-infini-opérade, notée K, utilisée pour construire la E-infini-coalgèbre sur l'élément principal d'une L-algèbre. Cette structure de E-infini-coalgèbre montre que la L-algèbre canoniquement associée à un ensemble simplicial contient au moins autant d'information homotopique que la E-infini-coalgèbre couramment associée à un ensemble simplicial
In this thesis we recall the notion of L-algebra. L-algebras are intended as algebraic models for homotopy types. L-algebras were introduced by Alain Prouté in several talks since the eighties. The principal objective of this thesis is the description of an E-infinity-coalgebra structure on the main element of an L-algebra. This can be seen as a generalization of the E-infinity-coalgebra structure on the chain complex associated to a simplicial set given by Smith in Iterating the cobar construction, 1994. We construct an E-inifity-operad, denoted K, used to construct the E-inifity-coalgebra on the main element of a L-algebra. This E-inifity-coalgebra structure shows that the canonical L-algebra associated to a simplicial set contains at least as much homotopy information as the E-inifity-coalgebras usually associated to simplicial sets

Style APA, Harvard, Vancouver, ISO itp.

35

Jordaan, Tembisa Nomathamsanqa. "The effect of mussel bed structure on the associated infauna in South Africa and the interaction between mussel and epibiotic barnacles". Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1005360.

Pełny tekst źródła

Streszczenie:

Mussels are important ecological engineers on intertidal rocks where they create habitat that contributes substantially to overall biodiversity. They provide secondary substratum for other free-living, infaunal or epifaunal organisms, and increase the surface area for settlement by densely packing together into complex multilayered beds. The introduction of the alien invasive mussel Mytilus galloprovincialis has extended the upper limit of mussels on the south coast of South Africa, potentially increasing habitat for associated fauna. The aim of this study was to describe the structure of mussel beds, the general biodiversity associated with multi- and monolayered mussel beds of indigenous Perna perna and alien M. galloprovincialis, and to determine the relationship between mussels and epibiotic barnacles. This was done to determine the community structure of associated macrofauna and the role of mussels as biological facilitators. Samples were collected in Plettenberg Bay, South Africa, where M. galloprovincialis dominates the high mussel zone and P. perna the low zone. Three 15 X 15 cm quadrats were scraped off the rock in the high and low zones, and in the mid zone where the two mussel species co-exist. The samples were collected on 3 occasions. In the laboratory mussel-size was measured and sediment trapped within the samples was separated through 75 μm, 1 mm and 5 mm mesh. The macrofauna was sorted from the 1 mm and 5 mm sieves and identified to species level where possible. The epibiotic relationship between mussels and barnacles was assessed by measuring the prevalence and intensity of barnacle infestation and the condition index of infested mussels. Multivariate analysis was used on the mean abundance data of the species for each treatment (Hierarchical clustering, multidimensional scaling, analysis of similarity and similarity of percentages) and ANOVA was used for most of the statistical analyses. Overall, the results showed that tidal height influences the species composition and abundance of associated fauna. While mussel bed layering influenced the accumulation of sediments; it had no significant effect on the associated fauna. Time of collection also had a strong effect. While there was an overlap of species among samples from January, May and March, the principal species contributing to similarity among the March samples were not found in the other two months. The outcomes of this study showed that low shore mussel beds not only supported a higher abundance and diversity of species, but were also the most structurally complex. Although the condition index of mussels did not correlate to the percentage cover of barnacle epibionts, it was also evident that low shore mussels had the highest prevalence. The levels of barnacle infestation (intensity) for each mussel species were highest where it was common and lowest where it was least abundant. This is viewed as a natural artefact of the distribution patterns of P. perna and M. galloprovincialis across the shore. Mussels are more efficient as facilitators on the low mussel zone than the high mussel zone possibly because they provide habitats that are more effective in protecting the associated macrofauna from the effects of competition and predation, than they are at eliminating the effects of physical stress on the high shore. Although mussels create less stressful habitats and protect organisms from the physical stress of the high shore, there are clear limitations in their ability to provide ideal habitats. The biological associations in an ecosystem can be made weak or strong depending on the external abiotic factors and the adaptability of the affected organisms.

Style APA, Harvard, Vancouver, ISO itp.

36

COVILLE, ARNAUD. "Approches de la commande robuste par positivite dans le cadre h-infini : application a la stabilisation de structures flexibles". Paris 6, 1992. http://www.theses.fr/1992PA066100.

Pełny tekst źródła

Streszczenie:

Cette these porte sur la commande robuste des systemes lineaires comportant des flexibilites. La robustesse est entendue comme la capacite de la commande a conserver certaines proprietes pour un ensemble predefini de modeles lineaires. Les systemes reels sont alors decrits a l'aide d'un ensemble de modeles, nomme ensemble modele. Les deux types de description par des modeles lineaires sont investigues: l'approche dans l'espace d'etat et l'approche frequentielle. On s'interesse dans l'espace d'etat aux ensembles modele definis a partir d'un modele nominal et d'incertitudes diagonales. Des conditions de stabilite ainsi que des methodes de synthese de correction pour de tels ensembles modele sont etablies dans la premiere partie du travail. Un exemple de commande de bras flexible illustre les avantages et inconvenients de la methode proposee. Dans une deuxieme partie, les ensembles modele consideres sont definis dans l'espace des fonctions de transfert a partir de la norme h-infini. Le theoreme du petit gain et les techniques de synthese de commande en decoulant sont presentees. Apres une analyse de la structure particuliere des ensembles modele decrivant les structures flexibles, nous avons propose une nouvelle methode de synthese de correcteur utilisant le concept de positivite. Cette methode permet de calculer un correcteur robuste en ameliorant substantiellement les performances. Une application industrielle de la methode proposee est ensuite exposee montrant son interet pratique

Style APA, Harvard, Vancouver, ISO itp.

37

Barakat, Abdallah Mouhammad. "Contribution à l'amélioration de la régulation de tension des générateurs synchrones : nouvelles structures d'excitation associées à des lois de commande H∞". Poitiers, 2011. http://nuxeo.edel.univ-poitiers.fr/nuxeo/site/esupversions/2eaed395-fb76-4af0-adf9-9db22d125dba.

Pełny tekst źródła

Streszczenie:

Le travail de recherche présenté dans ce mémoire traite de façon originale l'amélioration de la régulation de tension des générateurs synchrones autonomes durant les régimes transitoires de la charge. La structure d'excitation et la loi de commande associée sont deux éléments principaux qui influencent le comportement dynamique des générateurs synchrones. Le système d'excitation industriel est souvent basé sur la structure d'excitation classique (brushless) associée à un régulateur de tension analogique ou numérique de type PID. En remplaçant le régulateur industriel par un régulateur numérique H∞, une amélioration remarquable dans les performances du système a été obtenue. De nouvelles structures d'excitation permettant de commander directement la roue polaire à travers un pont PD3 à thyristors ou un pont PD3 à diodes suivi d'un hacheur ont permis d'obtenir de meilleurs résultats dynamiques en termes de chutes/dépassements de tension et temps de réponse. Une comparaison des régulateurs H∞ monovariables et multivariables ont montré que la structure SISO était plus simple et presque aussi performante que la commande MISO
The research works presented in this dissertation deals with the improvement of the voltage regulation of synchronous generator during the load variation. The excitation structure and the associated control strategy are two main factors that influence the dynamic behavior of synchronous generators. The industrial excitation system is based on the brushless excitation structure combined with an analogue or digital PID voltage controller. By replacing the industrial controller with an H∞ digital controller, a remarkable improvement in the system performance was obtained. Because of industrial structure limitations, we have developed new excitation structures that allow direct control of the synchronous generator main field current. The structures are based on exciter machine (wound field synchronous machine or permanent magnet machine) with a thyristor bridge or a diode one with a buck converter. The proposed structures combined with the H∞ control give the best results in terms of stability, voltage drops and overshoots, and response time

Style APA, Harvard, Vancouver, ISO itp.

38

Vincent, Sébastien. "Étude de la complémentarité d'actionneurs pour la commande active des structures flexibles". Toulouse, ENSAE, 1996. http://www.theses.fr/1996ESAE0002.

Pełny tekst źródła

Streszczenie:

La commande active des structures flexibles est la compensation des vibrations mécaniques à l'aide d'actionnaues qui peuvent être à forte ou à faible autorité, En fonction de la nature du dispositif envisagé. On étudie ici la complémentarité des deux types d'actionneurs, que l'on réunit au sein d'un même dispositif: un manipulateur flexible à un degré de liberté, piloté par un moteur électrique, dont le bras souple est une poutre treillis activable par intégration de translateurs piezo-électriques. La mise au point de ce support passe par les phases de modélisation et de dimensionnement de la structure, puis par celle du positionnement optimal des actionneurs dans la poutre. Une dépendance forte entre la répartition optimale, les performances de l'actionneur à forte autorité et l'autorité des translateurs eux-mêmes est mise en évidence, et une méthode permettant d'utiliser au mieux toute l'énergie de commande disponible est proposée. L'identification du dispositif montre que l'écart entre représentation et système physique est important, et qu'une approche de commande robuste est nécessaire. A l'aide de synthèses Hinfini/MU de complexité croissante, deux aspects de la complémentarité d'actionneurs sont présentés. Le premier traite de la complémentarité au voisinage d'une position de consigne, lorsque l'action à forte autorité devient inadaptée ou perturbatrice, et ou les translateurs assurent seuls la réjection des perturbations. Le second concerne la complémentarité au cours des déplacements, lorsque les actionneurs à faible et à forte autorité participent ensemble à la commande des fléxibilités. Il est ainsi montré qu'une action répartie complémentaire, même de faible importance, permet à la fois d'améliorer la qualité de la réjection des perturbations et les performances basse fréquence du manipulateur (meilleur temps de réponse).

Style APA, Harvard, Vancouver, ISO itp.

39

Mouni, Emile Bowendnéré. "Contribution à l'amélioration des performances des génératrices synchrones : nouvelle structure d'excitation basée sur une machine à aimants et combinée à des lois de commande avancées". Poitiers, 2008. http://theses.edel.univ-poitiers.fr/theses/2008/Mouni-Emile-Bowendnere/2008-Mouni-Emile-Bowendnere-These.pdf.

Pełny tekst źródła

Streszczenie:

Dans cette thèse une contribution a été faite sur l’étude et l’amélioration des performances de la génératrice synchrone (GS). C’est ainsi qu’une nouvelle structure d’excitation de la GS, basée sur l’utilisation d’une machine à aimants permanents combinée avec un pont redresseur à thyristors, a été proposée en vue d’alimenter directement l’inducteur de celle-ci. Afin de tirer un grand avantage de cette structure d’excitation dont la dynamique est par nature plus rapide que celle des structures classiques, deux lois de commande ont été mise en place : la commande prédictive et la commande H∞ et elles ont fourni des résultats assez similaires et très satisfaisants en simulation. Pour la validation expérimentale, une implantation en temps réel via une interface Dspace, nous a permis de conclure quant à la validité de notre approche. Une comparaison avec une structure d’excitation industrielle a été faite afin d’évaluer aussi bien quantitativement que qualitativement l’apport effectif de ce travail. Ainsi en termes de chutes/dépassement de tension, de temps de réponse et de taux de distorsion des signaux de sortie, la nouvelle approche combinée à une loi de commande moderne apporte une meilleure réponse par rapport aux structures classiques
The works presented in this dissertation are focussed on the study and the performances improvement of the synchronous generator. Then, a new excitation structure is proposed to directly feed the SG’s main armature. This exciter is based on a permanent magnet generator and thyristors bridge. In order to take real advantage of the new excitation structure, two modern and efficient control laws have been used: the predictive control and H∞ control. Both provide similar and very satisfactory results in simulation. Thanks to the real time implementation using the Dspace 1104, the effectiveness and the high performances of the new excitation approach have been proved. At the same time, an already used industrial excitation structure has been involved in the comparative study in order to quantify and qualify the real advantage of the new approach. Then, as regards voltage overshoots and drops, the time response and the output signal total harmonic distortion, the new excitation approach combined with modern control law gives better satisfaction than classical one

Style APA, Harvard, Vancouver, ISO itp.

40

Johansen, Kine. "Towards an evidence-based assessment of early motor performance in the child health services : Psychometric properties and clinical utility of the Structured Observation of Motor Performance in Infants". Doctoral thesis, Uppsala universitet, Institutionen för kvinnors och barns hälsa, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-317985.

Pełny tekst źródła

Streszczenie:

The Swedish child health services (CHS) have a unique position in that they reach almost all children 0-6 years of age. The child health nurse has the main responsibility for developmental surveillance. Twelve scheduled visits with the nurse during the child’s first year of life make this an ideal setting to systematically identify infants with motor problems, ranging from asymmetric head positioning that may lead to plagiocephaly to more severe forms such as cerebral palsy (CP). However, the CHS lack evidence-based methods to assess motor development. The Structured Observation of Motor Performance in Infants (SOMP-I) assesses motor performance in two domains, i.e. level of motor development and quality of motor performance. SOMP-I is quick, non-invasive, requires minimal handling, and is suitable for a busy clinical setting when applied by physiotherapists. Given the importance of early detection, the increased likelihood of detecting motor problems when using evidence-based assessment methods and the key role of nurses within the CHS, the overall aim of this thesis was investigate the psychometric properties and clinical utility of SOMP-I when used by child health nurses. Furthermore, we aimed to establish the ability of SOMP-I to detect CP. Our results show that child health nurses can reliably assess the level of motor development in infants using SOMP-I. More variability was found when they assessed the infants’ quality of motor performance. Although the nurses expressed concern about introducing a more time-consuming assessment in an already tight schedule, they were able to integrate the SOMP-I assessment in routine care. The nurses reported that barriers to using SOMP-I were mostly logistic and practical in nature, and they pointed out the necessity of education and practice in order to become proficient assessors. Using SOMP-I appears to have supported the nurses in the decision-making process regarding motor performance in routine care. SOMP-I detected CP during the first months of life in neonatal intensive care recipients. To our knowledge, these studies are the first to evaluate child health nurses’ assessment of early motor performance using an evidence-based assessment method in routine care. The results are promising, but further research is warranted.

Style APA, Harvard, Vancouver, ISO itp.

41

Metallo, Amber C. "A Comparison of Macroinfaunal Community Structure between Artificial Concrete Boulder Reefs and Adjacent Natural Reefs in Broward County, Florida". NSUWorks, 2015. http://nsuworks.nova.edu/occ_stuetd/395.

Pełny tekst źródła

Streszczenie:

Relatively little is known about either the biological (i.e., predation) or physical (i.e., current, sedimentation) effects that artificial reefs may have on surrounding benthic infaunal communities. Following deployment of artificial reefs (concrete boulders) between the first and second reefs off Fort Lauderdale, Florida, on 30 October 2009, sediment cores were taken at 4 distances along three replicate 10-m transects on 13 and 26 September 2013, and 24 and 25 May 2014 at each of four artificial reef sites and four of their adjacent natural reef sites using SCUBA. Infauna (>0.5mm) were extracted from the sediment and identified to the lowest possible taxonomic level. Statistical analysis (PRIMER, PERMANOVA, SIMPER) focused on four main variables: type of reef, year, site, and distance. Type of reef, year, and site was significantly different between samples, while distance did not affect density. There is a clear separation of communities between the artificial and natural reefs. From 2013 to 2014, a slight shift occurred between communities suggesting the artificial reef community composition became slightly more similar to the natural reef. All four artifical reef sites were more taxonomically distinct at the phylum and class level then the natural reef, which had higher diversity, higher species richness and more low-density taxa. This two year study provides insight on infauna communities four and five years out from deployment, but follow up monitoring in 3-5 years could shed light on whether these patterns of shift to more similar assemblages between reefs will continue as the artificial reef matures. Environmental data collection including longer time-series datasets, longer transects, and physical and geological data could provide more knowledge of how the artificial reef infaunal communities are changing over time.

Style APA, Harvard, Vancouver, ISO itp.

42

Penn, Zoe Jillian. "A prospective randomised multicentre trial to compare elective versus selective caesarian section for the preterm infant in breech presentation : and a structured investigation into the possible reasons for presentation failure to recruit into this trial". Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264185.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

43

Rippeyoung, Phyllis Love Farley. "Is it too late baby? pinpointing the emergence of a black-white test score gap in infancy". Diss., University of Iowa, 2006. http://ir.uiowa.edu/etd/80.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

44

Steglich, Heike. "Schädelasymmetrie und Vorzugshaltung im korrigierten Alter von drei Monaten:". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-231031.

Pełny tekst źródła

Streszczenie:

Im Verlauf der ersten Lebensmonate weisen sowohl Termin- als auch Frühgeborene eine hohe Prävalenz der lagebedingten, nichtsynostotischen Schädelasymmetrie bzw. der Vorzugshaltung auf. Frühgeborene sind hierfür besonders vulnerabel. Eine Reihe von Studien beschrieb Zusammenhänge zwischen Rückenschlaflage und dem gehäuften Auftreten von Schädelasymmetrien bzw. Vorzugshaltungen. Zur Vermeidung solcher Asymmetrien wurde im Jahr 2011 für die monitorüberwachten Patienten der neonatalen IMC-Station der Kinderklinik des Universitätsklinikums Dresden ein strukturiertes Lagerungsschema mit wechselnder Seit- und Rückenlage eingeführt. Ziel dieser retrospektiven Studie war es, zu untersuchen, ob durch die „Lagerung nach Schema“ die Prävalenzen der Schädelasymmetrie und Vorzugshaltung bei den Frühgeborenen des Jahrgangs 2011 im korrigierten Alter von drei Monaten gesenkt werden konnten. Dafür erfolgte ein Vergleich mit den Frühgeborenen der IMC-Station aus dem Vorjahr 2010, in welchem ein strukturiertes Lagerungsschema nicht angewendet wurde. Desweiteren sollten Determinanten ermittelt werden, die für die Entwicklung einer Schädelasymmetrie und/oder Vorzugshaltung in Frage kommen. Die Studienpopulation bestand aus einer „Lagerungsgruppe“ mit 48 Frühgeborenen des Geburtsjahrganges 2011 und einer Kontrollgruppe aus 47 Frühgeborenen des Geburtsjahrganges 2010. Alle 95 Frühgeborenen wurden zwischen 30+0 und 36+0 Gestationswochen geboren und waren weitestgehend gesund. Im ersten Schritt wurde der Lagerungseffekt überprüft durch Vergleich die Prävalenzen der „Lagerungsgruppe“ und der Kontrollgruppe. Im zweiten Schritt erfolgte die Ermittlung der Determinanten für Schädelasymmetrie und Vorzugshaltung anhand eines Vergleichs zwischen Frühgeborenen mit Schädelasymmetrie bzw. Vorzugshaltung und Frühgeborenen, bei denen dies nicht vorlag. Im Ergebnis zeigten sich sowohl in der „Lagerungsgruppe“, als auch in der Kontrollgruppe hohe Prävalenzen mit 31% vs. 21% bei der Schädelasymmetrie, 19% vs. 21% bei der Vorzugshaltung und 42% vs. 36% bei der „Asymmetrie gesamt“, wobei letztere alle Patienten mit einem oder mehreren klinischen Asymmetriezeichen (Schädelasymmetrie und/oder Vorzugshaltung) erfasste. Occipitale Abflachung und Vorzugshaltung traten rechts häufiger auf als links. Als Determinanten für die Entwicklung der Schädelasymmetrie sowie der „Asymmetrie gesamt“ konnten eine längere durchschnittliche Aufenthaltsdauer auf der Intensivstation, eine durchschnittlich längere kumulative Anwendungsdauer mechanischer Atemhilfen und männliches Geschlecht ermittelt werden. Zudem wurden die Frühgeborenen mit Vorzugshaltung bzw. „Asymmetrie gesamt“ häufiger per Sectio caesaria geboren als per Spontangeburt. Eine zum Zeitpunkt des errechneten Geburtstermins aufgetretene Schädelasymmetrie war in 55% und eine Vorzugshaltung in 67% der Fälle transient und trat im korrigierten Alter von drei Monaten nicht mehr auf. Hingegen wurde bei ca. 62% der Frühgeborenen, die im korrigierten Alter von drei Monaten eine Schädelasymmetrie bzw. Vorzugshaltung zeigten, diese neu diagnostiziert. Eine Senkung der Prävalenzen der Schädelasymmetrie und der Vorzugshaltung durch „Lagerung nach Schema“ konnte anhand des Gruppenvergleichs zwischen „Lagerungs-“ und Kontrollgruppe nicht nachgewiesen werden. Im Lagerungsschema war die Bauchlage vereinbarungsgemäß nicht enthalten. Ihr positiver Einfluss auf die Entwicklung wird aber diskutiert. Möglicherweise ist es von Vorteil, bereits in den ersten Lebenswochen die Bauchlage bei monitorüberwachten Frühgeborenen in das Lagerungsschema bzw. tägliche Bauchlagezeiten unter Aufsicht in den Alltag zu integrieren. Um Spätfolgen der Schädelasymmetrie und Vorzugshaltung, wie Entwicklungsverzögerung, Wahrnehmungs- und Lernprobleme oder psychosoziale Benachteiligung zu vermeiden, ist Prävention und Früherkennung notwendig. Frühgeborene männlichen Geschlechts, nach Geburt per Sectio caesaria, nach langer Aufenthaltsdauer auf der neonatalen Intensivstation sowie nach langer Anwendungsdauer mechanischer Atemhilfen zeigten in dieser Studie ein erhöhtes Risiko für eine Asymmetrie und sollten daher besonders berücksichtigt werden
There is a high prevalence of plagiocephaly and positional preference in both full term and especially preterm infants during their first months of life. A number of studies show a connection between the back sleeping position and the high prevalence of plagiocephaly or positional preference. To avoid such asymmetries a “structured positioning scheme”, with alteration between supine and lateral position of the infants, was introduced in 2011 at the neonatal intermediate care station of the pediatric clinic of the University Hospital Dresden. The aim of this retrospective study has been to investigate if the prevalence of plagiocephaly or positional preference in preterm infants could be reduced by the structured positioning scheme. A comparison was made between the preterm infants at three months of corrected age in the year 2011, and the same cohort in the previous year 2010, in which the structured positioning scheme has not been applied. Furthermore, determinants of positional plagiocephaly and/or positional preference should be identified. The study population consisted of a "positioning group" with 48 preterm infants born in the year 2011, and a control group of 47 preterm infants born in the year 2010. All 95 preterm infants were born between 30 + 0 and 36 + 0 weeks of gestational age and were largely healthy. In the first step, the positional effect has been checked by comparing the prevalence of the positioning group with the control group. In the second step, the determinants has been identified by comparing the preterms with plagiocephaly and positional preference, and the preterms without the corresponding asymmetry characters. The prevalence in the positioning group and the control group, respectively, was 31% vs. 21% for the plagiocephaly, 19% vs. 21% for the positional preference and 42% vs. 36% for complete asymmetry (where one or more clinical signs of asymmetry – plagiocephaly and/or positional preference – was observed). Positional preference and occipital flattening of the right side occured more often than left. The following determinants for the development of the plagiocephaly and "total asymmetry” have been identified: a longer average length of stay in the neonatal intensive care unit, a longer cumulative duration of use of mechanical ventilation, and male sex. Moreover, the majority of preterms with positional preference or complete asymmetry were born by cesarean section rather than by spontaneous delivery. 55% of the plagiocephaly and 67% of the positional preference at term-equivalent age was transient and no longer present at three months of corrected age. However, about 62% of preterm infants who showed a plagiocephaly or positional preference at three months corrected age were newly diagnosed. A reduction in the prevalence of plagiocephaly and positional preference by “structured positioning scheme” could not be demonstrated by the group comparison between “positioning group” and control group. The integration of the prone position in the structured positioning scheme has not been included in the study, but its positive impact on the development will be discussed. It is possibly beneficial to integrate the prone position by monitored preterms in the “structured positioning scheme” or daily tummy time in the first weeks of life. To avoid late effects of plagiocephaly and positional preference, such as developmental delay, perception problems, learning disabilities or psychosocial disadvantage, is prevention and early detection necessary. Preterm of male sex, delivery by cesarean section, a long stay in the neonatal intensive care unit, and a long period of use of mechanical ventilation have been shown to increase the risk of developing asymmetry and should therefore be given special consideration

Style APA, Harvard, Vancouver, ISO itp.

45

Frechard, Jonathan. "Systèmes d'entraînement de bandes flexibles : optimisation multicritère des performances dynamiques par approche évolutionnaire". Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAD015/document.

Pełny tekst źródła

Streszczenie:

La conception des systèmes d'entrainement de bande est étudiée depuis de nombreuses années. Ces systèmes sont très répandus dans l'industrie puisque le conditionnement sous forme de bobines simplifie le traitement de nombreux matériaux tels que le papier, le carton, les polymères, ... Ces systèmes regroupent un grand nombre de difficultés : ils sont de grande dimension, un fort couplage existe entre les grandeurs et de nombreux paramètres varient au cours du temps. La méthode d’optimisation classique consiste à considérer chaque partie du système sans tenir compte des autres. De plus, au sein d'un même sous-ensemble, l’optimisation est réalisée discipline par discipline. Une nouvelle approche est proposée et appliquée à la synthèse de la commande : il s’agit de considérer le système global en prenant en compte la robustesse paramétrique. Ensuite, le choix optimal du tracteur maître et de la technologie d'asservissement de la tension de bane associée sont étudiées
The design of roll-to-roll systems is studied for several years. This kind of system is very common in industry because the wound roll packaging simplify the treatment of material such as paper, cardboard, polymers, metal ... The studied systems have a high number of difficulties: they are large scale systems, a high coupling between physical values exists and several parameters are time dependent. The classical optimisation method consists in considering separately each subsystem without taking into account interactions. Moreover, the classical optimisation is made for each scientific field. A new approach is developed and applied to controller synthesis: the controllers are synthesized considering the global system with parametric uncertainties. The optimal choice of the master roller position and the technology used to control web tension are then studied

Style APA, Harvard, Vancouver, ISO itp.

46

Liu, Yan. "In-vivo evaluation of brain structure in preterm neonates at term-equivalent time: contribution of diffusion tensor imaging and probabilistic tractography". Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209726.

Pełny tekst źródła

Streszczenie:

The preterm delivery (<37 weeks gestation) rates are generally 5-9% in Europe, 12-13% in the US, and each year about 13 millions preterm infants are born worldwide (MacDorman and Mathews, 2009; Slattery and Morrison, 2002). The early exposure to the extra-uterine environment increases the risks of perinatal brain injury, involving more often the white matter. The white matter injury is characterized by a potential subsequent occurrence of cognitive problems, of developmental delay and of major motor deficits (e.g. cerebral palsy).

The most widely used imaging technique for studying neonatal brain is cranial ultrasound that can be performed at bedside and detects major brain abnormalities (hemorrhage, infarctions, cysts, dilatation of the lateral ventricles). However, it has a poor sensitivity for non-cystic or diffuse white matter abnormalities (WMA), the most common form of white matter injury in preterm infants. In comparison to ultrasound, MR (magnetic resonance) imaging has been reported to be superior in detecting WMA and is considered as an essential modality for imaging the neonatal brain. The standard sequences (e.g. T1-, T2-weighted imaging) are routinely performed for assessing not only brain anatomy, but also for evaluating brain lesions. Nevertheless, ¡§conventional MR imaging¡¨ has been criticized because it is limited in qualitative assessment and it does not provide information on the extent of specific white matter pathways injuries.

Currently, diffusion tensor imaging (DTI) enables more detailed exploration of white matter microstructure. Furthermore, DTI is now the best in vivo technique capable of delineating white matter pathways and quantifying microstructural changes not visible on conventional MR imaging. Diffusion tensor tractography allows the reconstruction of the principal white matter fibers. Moreover, it also provides diffusion indices like fractional anisotropy (FA), mean diffusivity (MD), longitudinal diffusivity (£f//), transverse diffusivity (£f¢r) that help assess the changes in fiber tracts, even before myelination becomes histologically evident.

Structural MR imaging studies performed in neonates are scarce. A number of essential questions are still under debate, concerning the normal white matter structure, as well as premature brain injury. First, left language lateralization and right handedness are complex phenomena incompletely understood and the question rises whether structural lateralization already exist in healthy preterm neonates at term-equivalent age. Second, it is of interest to know whether gender-related structural differences exist in healthy preterm neonates. Finally, in the assessment of preterm brain injury, the relationship between WMA on conventional imaging and altered diffusion indices in fiber tracts is still unclear. Therefore, the aims of the thesis were to investigate the brain structure in a population of preterm neonates at term-equivalent age by DTI and probabilistic tractography.

The first part of this thesis (Study I and Study II) was devoted to the study of white matter structural characteristics in healthy preterm neonates. Previous studies have shown that structural asymmetries in language and motor related fibers are present in adults and in infants (Dubois et al. 2009; Westerhausen et al. 2007). Our hypothesis was that these structural asymmetries are already present in preterm neonates at term-equivalent age. In Study I, DTI and probabilistic tractography were performed and we found volume and microstructural asymmetries in the language related parieto-temporal superior longitudinal fasciculi (SLF), in the motor related corticospinal tract (CST) and in the motor part of the superior thalamic radiation (STR) as well. In Study II, we found that compared to boys, girls have larger relative tract volumes and an advanced maturation in language and motor related fiber tracts.

The second part of this thesis (Study III) investigated whether WMA on conventional MR imaging are related to abnormalities within the fiber tract microstructures. WMA were classified as normal, mild, moderate and severe according to Woodward¡¦s classification (Woodward et al. 2006). Woodward and colleagues studied a large population (167 infants) of preterm infants at term equivalent age with MRI. They demonstrated that WMA were important predictors of neurological outcomes by comparing their results with the neurological outcomes of those infants at corrected age of two. We found that compared to neonates with no abnormalities, infants with mild abnormalities have significantly higher ƒÜ¢r in the right CST, the left anterior thalamic radiation (ATR), the left sensory STR and bilateral motor STR. Those findings might be related to injuries of premyelinating oligodendrocytes resulting in subsequent failure of both development and ensheathment of axons. Considering that those fiber tracts connect important cortical zones, microstructural changes in those fiber tracts might be responsible for the later neurodevelopment deficits in motor and cognitive functions.

We concluded that structural asymmetries and gender differences in motor and language related fibers are present in healthy preterm neonates at term-equivalent age well before the development of speech and hand preference. Structural asymmetries and gender differences have to be considered in neonatal white matter assessment. Finally, altered DTI indices are associated with WMA on conventional MR imaging in preterm neonates. Our results suggest that disrupted premyelination is the major correlate with WMA rather than axonal pathology. Non-invasive DTI and tractography constitute an additional tool for the assessment of white matter injuries, as it could provide more adequate diagnostic information on brain microstructure in preterm neonates at term-equivalent age.
Doctorat en Sciences médicales
info:eu-repo/semantics/nonPublished

Style APA, Harvard, Vancouver, ISO itp.

47

Perez, Gonzalez Jose Alvaro. "Commande robuste structurée : application au co-design mécanique / contrôle d’attitude d’un satellite flexible". Thesis, Toulouse, ISAE, 2016. http://www.theses.fr/2016ESAE0026/document.

Pełny tekst źródła

Streszczenie:

Dans cette étude de thèse, le problème du co-design mécanique/contrôle d’attitude avec méthodesde la commande robuste structurée est considéré. Le problème est abordé en développant une techniquepour la modélisation de systèmes flexibles multi-corps, appelé modèle Two-Input Two-Output Port (TITOP).En utilisant des modèles d’éléments finis comme données d’entrée, ce cadre général permet de déterminer, souscertaines hypothèses, un modèle linéaire d’un système de corps flexibles enchaînés. De plus, cette modélisationTITOP permet de considérer des variations paramétriques dans le système, une caractéristique nécessaire pourréaliser des études de co-design contrôle/structure. La technique de modélisation TITOP est aussi étenduepour la prise en compte des actionneurs piézoélectriques et des joints pivots qui peuvent apparaître dans lessous-structures. Différentes stratégies de contrôle des modes rigides et flexibles sont étudiées avec les modèles obtenus afin de trouver la meilleure architecture de contrôle pour la réjection des perturbations basse fréquence etl’amortissement des vibrations. En exploitant les propriétés d’outils de synthèse H1 structurée, la mise enoeuvre d’un schéma de co-design est expliquée, en considérant les spécifications du système (bande passantedu système et amortissement des modes) sous forme de contraintes H1. L’étude d’un tel co-design contrôled’attitude/mécanique d’un satellite flexible est illustré en utilisant toutes les techniques développées, optimisantsimultanément une loi de contrôle optimisée et certains paramètres structuraux
In this PhD thesis, the integrated control/structure design of a large flexible spacecraft isaddressed using structured H1 synthesis. The problem is endeavored by developing a modeling technique forflexible multibody systems, called the Two Input Two Output Port (TITOP) model. This general frameworkallows the assembly of a flexible multibody system in chain-like or star-like structure, using finite elementmodels as input data. Additionally, the TITOP modeling technique allows the consideration of parametricvariations inside the system, a necessary characteristic in order to perform integrated control/structure design. In contrast to another widely used method, the assumed modes method, the TITOP modelling technique is robust against changes in the boundary conditions which link the flexible bodies. Furthermore, the TITOP modeling technique can be used as an accurate approximation even when kinematic nonlinearities can be large. The TITOP modeling technique is extended to the modeling of piezoelectric actuators and sensors for the control of flexible structures and revolute joints. Different control strategies, either for controlling rigid body and flexible body motion, are tested with the developed models for obtaining the best controller’s architecture in terms of perturbation rejection and vibration damping. The implementation of the integrated control/structure design in the structured H1 scheme is developed considering the different system’s specifications, such as system’s bandwidth or modes damping, in the form of H1 weighting functions. The integrated attitude control/structure design of a flexiblesatellite is performed using all the developed techniques and the optimization of the control law and severalstructural parameters is achieved

Style APA, Harvard, Vancouver, ISO itp.

48

Ewerton, Mary Lúcia Adler. "ESTRUTURA FAMILIAR E GRAVIDEZ NA ADOLESCÊNCIA: UM ENFOQUE SISTÊMICO". Universidade Federal do Maranhão, 2010. http://tedebc.ufma.br:8080/jspui/handle/tede/1147.

Pełny tekst źródła

Streszczenie:

Made available in DSpace on 2016-08-19T18:16:02Z (GMT). No. of bitstreams: 1 MARY_ LUCIA_ ADLER_ EWERTON.pdf: 1860382 bytes, checksum: 9c0827ad426465311411b7f5bc0f1bd5 (MD5) Previous issue date: 2010-09-24
Qualitative study, aiming to address the relationship between family structure and adolescent pregnancy in a systemic approach. Assumes that the family structure operates in the conduct of its members in influencing their decisions. The research was conducted at the Center for Health Care of Adolescents (NASA), the Maternal and Child Unit, and initiated after the approval of the Ethics in Research HU-UFMA. The inclusion criterion was adopted family have a pregnant teenager, between 10 and 19 years in attendance at NASA, Maternal and Child Unit. Families with pregnant adolescents with mental changes, hearing or language, not the object of study. The sample followed the criteria proposed saturation field, having participated in the study were eight families. Data collection was conducted from September to November 2009, initially being held at NASA, as teenagers, and then, in homes with families. Triangulation was made of instruments: semi-structured interviews with adolescents, interviews with families, genogram families and field observation. The method used was content analysis, in the form of thematic analysis for data processing. Some results include: the family speech is greatly effective in how teenagers interact with the risk for becoming pregnant. The nature of the relationship between mothers and daughters present interactional agendas of the previous generation with regard to the topic of sexuality and teenage pregnancy. The subjects of this study point to the structural determinism of family interaction resulting in the choice of becoming pregnant or not pregnant. In most families there was a transgenerationality of teenage pregnancy. The story of mothers operates as a guide and as a context of justification of the behavior of adolescents. It should be emphasized in conclusion that the plot that underlies the behavioral responses of family members is linked in large part to family structure and history shared by its members, sufficient reason for early pregnancy is the subject of a systemic intervention from family stories as preventive procedure.
Estudo qualitativo, tendo como objetivo abordar a relação existente entre estrutura familiar e gravidez na adolescência em um enfoque sistêmico. Parte do pressuposto que a estrutura familiar atua no comportamento dos seus membros influenciando em suas decisões. A pesquisa foi realizada no Núcleo de Atenção à Saúde da Adolescente (NASA), da Unidade Materno-Infantil, sendo iniciada após a aprovação do Comitê de Ética em Pesquisa HUUFMA. O critério de inclusão adotado foi ter a família uma adolescente grávida, entre 10 e 19 anos, em atendimento no NASA, Unidade Materno-Infantil. As famílias, com adolescentes grávidas com alterações mentais, auditivas ou de linguagem, não foram objeto do estudo. A amostra seguiu os critérios da metodologia de saturação de campo, tendo participado do estudo oito famílias. A coleta de dados foi efetuada de setembro a novembro de 2009, sendo realizada inicialmente no NASA, com as adolescentes, e, depois, nas residências com as famílias. Foi feita a triangulação de instrumentos: entrevistas semi-estruturadas com as adolescentes, entrevistas abertas com as famílias, genograma das famílias e observação de campo. O método utilizado foi de análise de conteúdo, na modalidade de análise temática para o tratamento dos dados. Entre os resultados, destacam-se: o discurso familiar tem grande eficácia na forma como as adolescentes interagem com a situação de risco para engravidar. A natureza da relação estabelecida entre mães e filhas apresentam pautas interacionais da geração anterior no que se refere ao tema de sexualidade e gravidez na adolescência. Os sujeitos do estudo apontam para o determinismo estrutural resultante da interação familiar na escolha de engravidar ou não engravidar. Na maioria das famílias observou-se a transgeracionalidade da gravidez na adolescência. A história das mães opera como guia e como contexto de justificação do comportamento das adolescentes. Ressalta-se na conclusão que, a trama que subjaz às respostas comportamentais dos membros da família encontra-se vinculada, em grande parte, à estrutura familiar e à história compartilhada pelos membros, razão suficiente para que a gravidez precoce seja objeto de uma intervenção sistêmica a partir das histórias familiares como conduta preventiva.

Style APA, Harvard, Vancouver, ISO itp.

49

Trần, Thế Quang. "Unfolding based verification of concurrent infinite-state systems". Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13832/document.

Pełny tekst źródła

Streszczenie:

Nous proposons une technique de dépliage pour vérifier les systèmes concurrents infinis bien structurés. Certaines propriétés d'intérêt comme la bornitude, la couverture et la terminaison sont décidables grâce à la bonne structure de ces systèmes. D'autre part, le dépliage réduit efficacement l'explosion combinatoire en exploitant l'ordre partiel entre les événements des systèmes concurrents. Nous proposons une modélisation par structure d'événements pour des systèmes bien structurés élémentaires, tels les compteurs et les files de communication. Le dépliage d'un réseau de structures d'événements étant une structure d'événements, nous proposons ensuite une approche hiérarchique à la modélisation et à la vérification des systèmes, qui préserve la bonne structure. Enfin, nous proposons une technique d'élimination des événements redondants. La mise en œuvre de notre approche dans l'outil ESU nous permet de conclure à son efficacité
We propose an unfolding technique for verifying concurrent infinite-state systems that are well-structured. Some properties of interest such as boundedness, coverability and termination are decidable thanks to the well-structure of these systems. Moreover, the unfolding effectively reduces the combinatorial explosion by exploiting the partial order between events of concurrent systems. We propose a modelization using event structures for basic well-structured systems, such as counters and communication channels. As the unfolding of a synchronized product of event structures is an event structure, we obtain a hierarchical approach to modeling as well as to verifying systems, which preserves the well-structure. Finally, we propose a technique for eliminating redundant events. The implementation of our approach in the ESU tool allows us to conclude on its efficiency

Style APA, Harvard, Vancouver, ISO itp.

50

Guillemot, Agneta. "Rask, Resolut, Trogen : de indelta soldaterna i det svenska agrarsamhället : Västerbotten 1860-1901". Doctoral thesis, Umeå universitet, Historiska studier, 1986. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-100371.

Pełny tekst źródła

Streszczenie:

My study concerns the social recruitment of infantry soldiers in the Swedish standing army ( indelta armén). The 19th century Swedish army was composed of three parts : hired troops , the conscripts and above all the ”indelta armén”. Indelta armén was unique in the world because of its organizational form. It consisted of infantry soldiers, naval men and cavalry soldiers, which were supported by the landowning farmers. Normally two farmers had the responsibility to find an infantry soldier, to pay him an annual wage and to give him a small-crofters holding; at least this was intended when the system was first organized in the 1680s. The famous author Vilhelm Moberg has written a well-known novel ”Raskens” about one of these soldiers portraying also the whole system as well as the surrounding peasant society. All of the 20000 concerned soldiers lived in the Swedish countryside among the rest of the population. They all got special names,( for example meaning Quick, Prompt, Faithful) still existing as family names of Sweden today. The study concentrates on the question of the social importance of this system in a period of rapid transformation of Swedish society, i.e the end of the 19th century. The most important questions dealt with are: the ones concerning social and geographical recruitment of soldiers (i.e. those ôf the indelta armén), the means of support and education given to these soldiers in special army training schools. One part of the book concerns social mobility among ex-soldiers and a minor study treats their family structure.

Diss. Umeå : Umeå universitet, 1986

digitalisering@umu

Style APA, Harvard, Vancouver, ISO itp.

Rozprawy doktorskie na temat „Structure Infant”

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych