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Articoli di riviste sul tema "Bf 408"
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Livano Prez, Mayra Alondra, Blanca del Rio, Jaime Mariano del Río-Chivardí, Juan Valente Merida Palacios, Sergio de Jesus Romero Tapia, Francisco Javier Linares Zapien, Alberto Escalante Dominguez et al. "408 Prevalence and Risk Factors Associated to Symptoms of Rhinoconjunctivitis in Mexican School Children. A Multicenter Study". World Allergy Organization Journal 5 (febbraio 2012): S130. http://dx.doi.org/10.1097/01.wox.0000412171.15972.bf.
Testo completo
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Santika, Fiar Tri, Hery Suyanto, Ni Luh Putu Trisnawati e I. Putu Tedy Indrayana. "Determination of the Optical Band gap Energy from the Extraction and Evaporation of Anthocyanin Compound Sea Lettuce (Ulva Lactuca L.) Using Tauc Plot Method". BULETIN FISIKA 25, n. 1 (19 luglio 2022): 8. http://dx.doi.org/10.24843/bf.2024.v25.i01.p02.
Testo completoAbstract (sommario):
The optical energy gap of anthocyanin compounds from sea lettuce extract (Ulva lactuca L.) has been calculated using the Tauc plot method. Sea lettuce plants taken at Sanur Beach Bali. The sea lettuce was dried then mashed and extracted for 24 hours, the last being macerated through three cycles. The extraction results are then evaporated to obtain a thick extract solution. Extracted and evaporated-extraction samples were characterized by UV-Vis in the wavelength range of 200-800 nm. From the characterization results, it was found that the absorption of anthocyanin compounds for the extracted samples was at a wavelength of 268 and 412 nm. Meanwhile, for the extraction-evaporation sample, the absorption is at a wavelength of 286.5 and 408 nm. By using the Tauc plot method, the optical energy gap values ??for the extracted and extraction-evaporated samples were 2.69 and 2.54 eV, respectively. Therefore, anthocyanin compounds from both extracted and evaporation-extracted samples qualify as dye sensitized solar cells (DSSC) for TiO2 semiconductors.
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Pilipović-Spasojević, Olivera, Nenad Ponorac e Mira Spremo. "Body composition as indicator of eating disorders in female students". Биомедицинска истраживања 11, n. 2 (2020): 143–50. http://dx.doi.org/10.5937/bii2002143p.
Testo completoAbstract (sommario):
Introduction. The transition to university education as a stressful period and the need to be likeable where physical appearance is concerned can be a trigger for a change in attitudes towards eating patterns. Body composition is an essential component of nutritional status and the most common parameter used as an indicator of physical appearance. An unobtrusive onset of eating disorder can easily lead to a preoccupation with eating and body weight. The aim of the paper is to determine whether the parameters of body composition can qualitatively detect respondents with eating disorders. Methods. The epidemiological observational and analytical study included a representative sample comprised of 408 healthy female students, aged 19-22 years. A short socio-demographic questionnaire, a standardized questionnaire for assessment of eating disorders-Eating Attitudes Test-26 were used in the study while Omron BF 510 was used for anthropometric measurements of body weight and BMI. Results. The sample consisted of female students: agedmean = 20.5 years, with average height 168.65 cm (SD = 6.01), body weight 63.09 kg (SD = 9.9) and BMI 22.1 (SD = 3.2). According to EAT-26 (Mean = 13.24 and SD = 7.97), 16.7% of respondents with risk factors for eating disorders were detected. Conclusion. The maximum value of the Youden index of 0.24 ROC analysis confirms that the body composition parameters are not reliable indicators of eating disorders and EAT-26 is not reliable and acceptable as an independent test for assessing risk factors by means of considering different attitudes and deviant eating behaviors. Therefore, in order to achieve detection, monitoring, and perform preventive action, it is necessary to conduct regular systematic examinations among the student population.
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Tabla-Hernandez, J., P. F. Rodriguez-Espinosa, J. A. Mendoza-Pérez, E. Sánchez-Ortíz, E. Martinez-Tavera e A. G. Hernandez-Ramirez. "Assessment of Potential Toxic Metals in a Ramsar Wetland, Central Mexico and its Self-Depuration through Eichhornia crassipes". Water 11, n. 6 (14 giugno 2019): 1248. http://dx.doi.org/10.3390/w11061248.
Testo completoAbstract (sommario):
The Valsequillo reservoir is a Ramsar wetland due to its importance as a point of convergence of migratory waterfowl. It is located in Central Mexico and is currently endangered by the constant spill of municipal and industrial discharges from Puebla city. On this context, we evaluated thirteen potential toxic metals (PTMs) in water, Water hyacinth (E. crassipes) plants and sediments at this site. A combined number of 31 samples were collected from the study area. The degree/extent of metal contamination in sediments was assessed through different geochemical indexes, namely: Geoaccumulation index (Igeo), Enrichment Factor (EF) and Potential Ecological Risk Index (PERI). The ability of Water hyacinth plants residues as a phytodepurator in the Ramsar site was tested in terms of the bioaccumulation factor (BF) and the translocation factor (TF). The results concerning sediments showed that Pb, Cu and Hg pose a threat to the aquatic environment since Igeo and EF indicate sediments ranging from moderately contaminated to contaminated. Moreover, PERI pointed out Hg as the main contributor to the ecological risk in sediments, especially in the part of the reservoir covered by E. crassipes. Water hyacinth plants displayed good capacity to absorb PTMs from the water, since the content of Co, Zn, As, Ni, Cu, Pb, Ti, Cr, Ba, Mo and V in the total plant was (all values in mg/kg of dry weight) 21 ± 9, 408 ± 300, 12 ± 6, 93 ± 21, 93 ± 69, 53 ± 29, 1067 ± 643, 78 ± 55, 362 ± 39, 14 ± 0.6 and 96 ± 35, respectively. Metal content in sediments resembles to that of E. crassipes; especially in the roots, suggesting a constant deposition of plants at the bottom of the reservoir, which contributes to the eutrophication of the water. The present work encourages the need for a sustainable management of Water hyacinth plants in the Ramsar site, since they represent a plague and a natural phyto-depurator at the same time.
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KHAN, IHSAN ULLAH, WEIMIN SUN e ELFED LEWIS. "Radiological Impact on Public Health from Radioactive Content in Wheat Flour Available in Pakistani Markets". Journal of Food Protection 83, n. 2 (23 gennaio 2020): 377–82. http://dx.doi.org/10.4315/0362-028x.jfp-19-403.
Testo completoAbstract (sommario):
ABSTRACT Wheat flour is a dietary staple of Pakistani population. This study is mainly focused on the measurement of radioactivity concentration due to naturally occurring radioactive nuclides, uranium-238, thorium-232, potassium-40, and the corresponding hazardous radiological parameters, radium equivalent dose (Raeq), annual effective dose, internal hazard index (Hint), and ingestion effective activity \(\def\upalpha{\unicode[Times]{x3B1}}\)\(\def\upbeta{\unicode[Times]{x3B2}}\)\(\def\upgamma{\unicode[Times]{x3B3}}\)\(\def\updelta{\unicode[Times]{x3B4}}\)\(\def\upvarepsilon{\unicode[Times]{x3B5}}\)\(\def\upzeta{\unicode[Times]{x3B6}}\)\(\def\upeta{\unicode[Times]{x3B7}}\)\(\def\uptheta{\unicode[Times]{x3B8}}\)\(\def\upiota{\unicode[Times]{x3B9}}\)\(\def\upkappa{\unicode[Times]{x3BA}}\)\(\def\uplambda{\unicode[Times]{x3BB}}\)\(\def\upmu{\unicode[Times]{x3BC}}\)\(\def\upnu{\unicode[Times]{x3BD}}\)\(\def\upxi{\unicode[Times]{x3BE}}\)\(\def\upomicron{\unicode[Times]{x3BF}}\)\(\def\uppi{\unicode[Times]{x3C0}}\)\(\def\uprho{\unicode[Times]{x3C1}}\)\(\def\upsigma{\unicode[Times]{x3C3}}\)\(\def\uptau{\unicode[Times]{x3C4}}\)\(\def\upupsilon{\unicode[Times]{x3C5}}\)\(\def\upphi{\unicode[Times]{x3C6}}\)\(\def\upchi{\unicode[Times]{x3C7}}\)\(\def\uppsy{\unicode[Times]{x3C8}}\)\(\def\upomega{\unicode[Times]{x3C9}}\)\(\def\bialpha{\boldsymbol{\alpha}}\)\(\def\bibeta{\boldsymbol{\beta}}\)\(\def\bigamma{\boldsymbol{\gamma}}\)\(\def\bidelta{\boldsymbol{\delta}}\)\(\def\bivarepsilon{\boldsymbol{\varepsilon}}\)\(\def\bizeta{\boldsymbol{\zeta}}\)\(\def\bieta{\boldsymbol{\eta}}\)\(\def\bitheta{\boldsymbol{\theta}}\)\(\def\biiota{\\boldsymbol{\iota}}\)\(\def\bikappa{\boldsymbol{\kappa}}\)\(\def\bilambda{\boldsymbol{\lambda}}\)\(\def\\bimu{\boldsymbol{\mu}}\)\(\def\binu{\boldsymbol{\nu}}\)\(\def\bixi{\boldsymbol{\xi}}\)\(\def\biomicron{\boldsymbol{\micron}}\)\(\def\bipi{\boldsymbol{\pi}}\)\(\def\birho{\boldsymbol{\rho}}\)\(\def\bisigma{\boldsymbol{\sigma}}\)\(\def\bitau{\boldsymbol{\\tau}}\)\(\def\biupsilon{\boldsymbol{\upsilon}}\)\(\def\biphi{\boldsymbol{\phi}}\)\(\def\bichi{\boldsymbol{\chi}}\)\(\def\bipsy{\boldsymbol{\psy}}\)\(\def\biomega{\boldsymbol{\omega}}\)\(\def\bupalpha{\bf{\alpha}}\)\(\def\bupbeta{\bf{\beta}}\)\(\def\bupgamma{\bf{\gamma}}\)\(\def\bupdelta{\bf{\delta}}\)\(\def\bupvarepsilon{\bf{\varepsilon}}\)\(\def\bupzeta{\bf{\zeta}}\)\(\def\bupeta{\bf{\eta}}\)\(\def\buptheta{\bf{\theta}}\)\(\def\bupiota{\bf{\iota}}\)\(\def\bupkappa{\bf{\kappa}}\)\(\def\\buplambda{\bf{\lambda}}\)\(\def\bupmu{\bf{\mu}}\)\(\def\bupnu{\bf{\nu}}\)\(\def\bupxi{\bf{\xi}}\)\(\def\bupomicron{\bf{\micron}}\)\(\def\buppi{\bf{\pi}}\)\(\def\buprho{\bf{\rho}}\)\(\def\bupsigma{\bf{\sigma}}\)\(\def\buptau{\bf{\tau}}\)\(\def\bupupsilon{\bf{\upsilon}}\)\(\def\bupphi{\bf{\phi}}\)\(\def\bupchi{\bf{\chi}}\)\(\def\buppsy{\bf{\psy}}\)\(\def\bupomega{\bf{\omega}}\)\(\def\bGamma{\bf{\Gamma}}\)\(\def\bDelta{\bf{\Delta}}\)\(\def\bTheta{\bf{\Theta}}\)\(\def\bLambda{\bf{\Lambda}}\)\(\def\bXi{\bf{\Xi}}\)\(\def\bPi{\bf{\Pi}}\)\(\def\bSigma{\bf{\Sigma}}\)\(\def\bPhi{\bf{\Phi}}\)\(\def\bPsi{\bf{\Psi}}\)\(\def\bOmega{\bf{\Omega}}\)\(\left( {{I_{o,x}}} \right)\) in 12 local brands of wheat flour retailed throughout Pakistan. The radiometric assessment was performed by using a high-purity germanium detector. The specific activities (means ± standard deviations) of uranium-238, thorium-232, and potassium-40 were found to be 5.7 ± 0.41, 1.9 ± 0.02, and 132.4 ± 0.82 Bq/kg, respectively. The mean values of the corresponding radiometric variables, Raeq, Hint, and Io,x (sum), were also found to be 18.651 Bq/kg, 0.313 mSv/year, and 0.213 mSv/year, respectively. The total mean annual effective dose due to the presence of the aforementioned radionuclides in the collected samples was found to be 213.1 μSv/year, which is less than 1.00 mSv/year that is recommended by the World Health Organization and International Atomic Energy Agency. Thus, the natural radioactivity mass concentrations and the corresponding radiological variables were found to be below the recommended specific values and have no health risks for consumers. HIGHLIGHTS
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Alam, Shanon Iffat, Hadeel Hammoda, Faiza Khan, Reem Al Enazi e Ipek Goktepe. "Electrical Conductivity, pH, Organic Matter and Texture of Selected Soils Around the Qatar University Campus". Research in Agriculture Livestock and Fisheries 7, n. 3 (31 dicembre 2020): 403–9. http://dx.doi.org/10.3329/ralf.v7i3.51359.
Testo completoAbstract (sommario):
Assessment of soil quality by soil analysis is a valuable tool for a farm as it determines the inputs required for efficient and economical production. A proper soil test helps ensure the application of sufficient fertilizers to meet the requirements of the crop while taking advantage of the nutrients and conditions already present in the soil. Though soil pH, electrical conductivity (EC), organic matter and texture are important features that determine the fertility of the soil, quantitative information on these properties are limited. The objective of the present study was to assess the pH, EC, organic matters and texture of four selected locations around the Qatar University campus including Biology Field (BF), Science Garden (SG), Greenhouse Inside (GHI) and Greenhouse Outside (GHO). We observed significant differences in the pH, EC and organic matter contents among the four locations. The highest pH was observed in SG and lowest in GHI whereas highest EC was observed in GHI and lowest in BF. Highest organic matter was found in GHI and lowest in BF. The soil texture of the BF and SG was sandy clay while that of GHI and GHO was loamy sand. Considering all four parameters analyzed in the present study, the GHI soil was found more suitable for plant growth.
Res. Agric., Livest. Fish.7(3): 403-409, December 2020
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Ye, Le, Zhi-Xin Gong, Chao Shi, Jia-Jun Ma, Hao Liang, Fang-Wei Qi, Dian-Yu E, Chang-Feng Wang, Yi Zhang e Heng-Yun Ye. "(H2dabco)[Na(BF4)3]: an ABX3-type inorganic–organic hybrid perovskite compound exhibiting dielectric switching above room-temperature". CrystEngComm 21, n. 46 (2019): 7043–47. http://dx.doi.org/10.1039/c9ce01454c.
Testo completoAbstract (sommario):
The (H2dabco)[Na(BF4)3] undergoes a static-to-dynamic phase transition at 403/386 K. Crystal structure analysis reveals that H2dabco2+ and/or BF4− undergo disordering.
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Almutairi, Sattam M., Raghad S. Aljutaily, Raghad S. Alshuwayman, Marzouq Almutairi e Yousef M. Alshehre. "Breastfeeding Education and the Role of Physical Therapy: A Cross-sectional Survey". International Journal of Women's Health and Reproduction Sciences 11, n. 4 (13 agosto 2023): 160–67. http://dx.doi.org/10.15296/ijwhr.2023.8002.
Testo completoAbstract (sommario):
Objectives: This study aimed to assess the level of breastfeeding (BF) knowledge and the prevalence of musculoskeletal disorders associated with BF among mothers. Materials and Methods: The participants were given a questionnaire containing 20 questions regarding their knowledge of BF practices and the prevalence of musculoskeletal disorders. The responses were reported as mean, standard deviation (SD), number (n), frequencies (f), and percentages (%). Results: The study included 941 participants aged 18 to 49, with a median age of 31-35. Nearly half (47.9%; n = 451) of participants had no knowledge of the health advantages of BF. Furthermore, 82.6% (n = 777) of participants did not receive educational courses or information about childbirth during pregnancy or postnatal. Moreover, 42.7% (n = 402) reported BF-related musculoskeletal pain. The results showed that the least common information provided by doctors or other healthcare providers to mothers was that BF could reduce the risk of some types of cancer (13.6%; n = 128) and asthma and shortness of breath in children (14.1%; n = 133). The most common information was that breastfed children are at a lower risk of getting sick than formula-fed children (41.7%; n = 392). Conclusions: The study showed a lack of knowledge regarding the benefits of BF and a high prevalence of musculoskeletal disorders among BF mothers in Saudi Arabia. We strongly recommend increasing the number of educational courses that provide knowledge and skills related to BF practices and appropriate positioning during BF.
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HUUSKONEN, A., H. KHALILI e E. JOKI-TOKOLA. "Effects of replacing different proportions of barley grain by barley fibre on performance of dairy bulls". Agricultural and Food Science 16, n. 3 (4 dicembre 2008): 232. http://dx.doi.org/10.2137/145960607783328227.
Testo completoAbstract (sommario):
The objective of the present experiment was to study the effects of partial replacement of barley grain with barley fibre (BF) on animal performance, carcass traits and diet digestibility of growing dairy bulls. The feeding experiment comprised 20 Finnish Ayrshire bulls and 12 Holstein-Friesian bulls, and four treatments (8 bulls per treatment). There were four diets with two offered at stage 1 (from the initiation of the study to 450 kg live weight) and four at stage 2 (from 450 kg live weight to slaughter). The control diet (BF0) included grass silage (460 g kg1 dry matter) and barley grain (540), BF25 diet included grass silage (460), barley grain (405) and BF (135), BF50 diet included grass silage (460), barley grain (270) and BF (270), and BF75 diet included grass silage (460), barley grain (135) and BF (405). At stage 1 there were only two treatments (BF0 and BF50) and at stage 2, all four treatments were included. All bulls were fed total mixed ration ad libitum. The mean initial live weight of the bulls was 261 kg and the mean final live weight 650 kg. At stage 1 there were no significant treatment differences in dry matter, energy or protein intakes or in live weight gain. At stage 2, replacing barley grain with BF led to a linear decrease of daily live weight gain (P < 0.05) and a linearly reduced feed conversion (kg dry matter kg1 live weight gain) (P < 0.05). The apparent digestibility of the organic matter and neutral detergent fibre decreased linearly with increasing BF supplementation (P < 0.001). The dressing proportion and the carcass fat score decreased linearly (P < 0.05) with partial replacement of barley grain with BF. On carcass conformation, treatment had a significant (P < 0.05) quadratic effect: the BF25 and BF50 diets were classified highest. The results indicate that 50% of barley starch can be replaced with BF without affecting growth, but feed efficiency factors may decrease when barley starch is replaced with BF. At 75% replacement, feed intake was reduced, which resulted in a lower energy intake and reduced level of performance.;
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Chen, Cheng Ming, Hui Wang, Yong Tang e Xun Zhang. "Visual Fatigue Caused by Tablet PC Based on Critical Fusion Frequency and Eye Blink Frequency". Applied Mechanics and Materials 401-403 (settembre 2013): 544–47. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.544.
Testo completoAbstract (sommario):
The objective of the study is to evaluate visual fatigue induced by different tablet PCs (LCD/OLED) by measuring CFF (critical fusion frequency), BF (eye blink frequency) and (SR) subjective rating. Twelve healthy subjects (10 males and 2 females) participated in the study in a controlled simulated living environment with a 18-23°C temperature, 30-45% relative humidity and 150lx illuminance. The experiment was carried out about 50 minutes, including: 30 minutes watching task (EOG test) and 20 minutes test (including subjective questionnaire and CFF test before and after the experiment). The experiment design included dependent variables: CFF, BF and subjective rating (SR); and two independent variables: Tablet PC types, watching times. As a result, after the experiment, the decline range of CFF of LCD was lower significant than that of OLED (p<0.001); the decline range of BF of LCD was higher than that of OLED (p<0.01). Also, subjective rating indicated a consistent result that higher visual fatigue was founded after watching LCD. As a whole, watching LCD tablet PC caused higher visual fatigue than watching OLED tablet PC in general.
Tesi sul tema "Bf 408"
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Mackenzie, Ian Grant. "Executive control : an electrophysiological investigation of control processes". Thesis, University of Glasgow, 2008. http://theses.gla.ac.uk/407/.
Testo completoAbstract (sommario):
Everyday behaviour requires constant coordination and monitoring in order for our actions to be successful. Within cognitive science such coordination and monitoring of behaviour is termed ‘control’ and refers to a set of functions that serve to configure the mental system for performing specific acts. A system of cognitive control is thought to set high level goals and direct subordinate cognitive systems in order to accomplish those goals. This thesis utilises a cognitive electrophysiological approach to the study of executive control, addressing research questions concerning the mental processes that are modulated by executive control and the mechanisms underlying control-related processing adjustments. The first experimental chapter investigates the process of task switching. More specifically, how demanding is a proposed stage of endogenous task-set reconfiguration in terms of information processing? It was previously reported that the process of task-set reconfiguration constitutes a hard bottleneck delaying even the earliest processing stages (e.g. perceptual) (Oriet & Jolicoeur, 2003). Three experiments investigated this claim by manipulating stimulus contrast and RSI within an alternating runs task switching paradigm. Both RT results and measurements of P1 and N1 ERP component peak latency did not offer support to the claim that task-set reconfiguration delays perceptual processing. Experimental Chapters 3 and 4 used interference paradigms that are common within the study of executive control (e.g. Eriksen Flanker task and a Stroop task, respectively). Within such interference paradigms, separate stimulus dimensions (relevant and irrelevant) are manipulated, with RT being faster when both the relevant and irrelevant stimulus dimensions indicate the same response. This is termed the ‘congruency effect’ and is often attributed to a failure of selective attention, namely, an inability to ignore the irrelevant stimulus dimension. It has been demonstrated that such congruency effects are dependent upon task sequence with the effect being reduced (or absent) after an incongruent trial (Gratton et al., 1992). Such conflict adaptation effects are a popular measure of cognitive control processes. An influential model of cognitive control is the conflict monitoring model of Botvinick et al. (2001), with much evidence for this model being based on the conflict adaptation effect. Specifically, the model proposes that the ACC measures for the occurrence of response conflict within two response channels, and when detected, signals its occurrence to other brain regions (e.g. DLPFC) that are involved in implementing control. Such control may be implemented via a top-down biasing mechanisms of attention toward the task-relevant stimulus feature. Chapter 3 investigated the conflict adaptation effect within the Flanker task and examined, whether after the occurrence of conflict, attention is directed toward the task-relevant central target location. This was done by measuring P1 and N1 ERP component amplitudes. Although behavioural conflict adaptation effects were evident in overt behaviour, these were specific to response repetitions, consistent with a bottom-up priming account that excludes the necessity for a top-down control explanation (e.g. Mayr et al., 2003). In addition, P1 and N1 amplitude did not show any evidence of increased attentional focus toward the central target location after the occurrence of conflict. Chapter 4 investigated the conflict adaptation effect within a modified Stroop task, and again, examined whether after the detection of conflict, attention is directed toward the task relevant stimulus feature. This was done by measuring N170 amplitude - an ERP component proposed to index face processing - when a face stimulus served as the relevant and irrelevant stimulus dimension. Again, conflict adaptation effects were evident in overt behaviour, with this effect being driven by the occurrence of response conflict. Unlike the data from the Flanker task, the conflict adaptation effect within the Stroop task was specific to response alternations, and thus, a bottom-up priming account is not applicable in this instance. However, again the ERP results did not offer any evidence that the processing of the relevant stimulus dimension was enhanced after the occurrence of conflict. Implications of the present results are discussed in the context of executive control and in particular, in relation to models of task switching and models of conflict control.
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Donaghey, Claire L. "Is errorless learning an effective strategy for a procedural memory task?" Thesis, University of Glasgow, 2008. http://theses.gla.ac.uk/402/.
Testo completoAbstract (sommario):
Errorless learning has been demonstrated to be an effective strategy for the cognitive rehabilitation of people with memory impairment. This study aimed to determine whether errorless learning is an effective strategy for teaching a complex procedure. Cognitive impairment has been tentatively linked with outcome after rehabilitation for lower limb amputation. Addressing this impairment may improve outcome. The aim of this study was to determine whether using an errorless learning approach would be beneficial for individuals who are learning how to put on their prosthetic limb. Thirty participants from a prosthetic clinic (WestMARC) were randomly assigned to an intervention (n = 15) or control group (n = 15). Results suggest that errorless learning is beneficial in terms of increasing the number of correct steps recalled from a fitting sequence (Mann-Whitney U = 28; p = 0.000, 2-tailed) compared to the control group. In addition, the errorless learning group made fewer errors during the fitting sequence compared to the control group (Mann-Whitney U = 39; p = 0.002, 2-tailed). The findings suggest that errorless learning is a beneficial approach to use when individuals are learning a procedural memory task.
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Ramsay, Amy L. "Therapy expectations and motivation : preliminary exploration and measurement in adults with intellectual disabilities". Thesis, University of Glasgow, 2008. http://theses.gla.ac.uk/409/.
Testo completoAbstract (sommario):
Objectives: To carry out a preliminary exploration and measurement of therapy expectancy and motivation in adults with intellectual disabilities through the development and psychometric evaluation of the Therapy Expectation and Motivation Measure (TEAMM). Design: The initial scale development phase combined top-down theory driven and bottom-up data driven processes to identify TEAMM items and format. The subsequent scale evaluation phase piloted the TEAMM and used correlational analyses to evaluate reliability and validity. Method: Six adults with intellectual disabilities took part in semi-structured interviews about therapy expectancy and motivation in order to identify TEAMM items. A further 22 participants piloted the measure for psychometric evaluation. Results: Preliminary psychometric evaluation confirmed that the TEAMM has acceptable test-retest reliability and internal consistency. Assessment of construct validity found a strong and positive relationship with a measure of general self-efficacy. Client expectations of therapy were largely positive and congruent with therapy as a goal-oriented process in which they will be an active participant. However, a number of individuals were unclear about the reason for referral and felt a low level of involvement in the process. Client and carer perceptions of referral understanding were significantly different. Conclusions: The TEAMM may help clinicians to identify potential barriers to engagement in therapy and find ways of enhancing the therapeutic experience of adults with an intellectual disability. Further psychometric evaluation of the TEAMM with larger samples is required to confirm the factorial structure of the scale and enhance its clinical utility.
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Mohr, Sibylle. "The neurocognition of linguistic conflict resolution : evidence from brain oscillations, ERPs, and source modelling". Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/4084/.
Testo completoAbstract (sommario):
The ability to express thought in language, to communicate, and to rapidly understand who did what to whom is a highly complex cognitive skill and ultimately the cognitive trait that defines us as being human. For the most part, language comprehension runs very smoothly and people perform it extremely quickly and efficiently. One might think this is nothing exceptional, were it not for the fact that everyday speech contains plenty of ambiguities, speech errors, and otherwise conflicting or interfering information. Similar to any other cognitive system, the language system is fitted out with mechanisms that detect conflicts and trigger compensating adjustments ‘on-the-fly’ in order to make sense of what has been said. Inevitably, language comprehension requires a combination of automatic and controlled processes and, depending on the context, we engage in both to varying degrees. Historically, linguistic conflict resolution has been investigated regarding to what extent linguistic modules such as ‘syntax’ and ‘semantics’ contribute to the process. In this thesis I take a step away from the traditional approach towards the question how the mechanisms underlying linguistic conflict resolution fit into domain-general cognition. It has been shown that controlled processing reliably results in activation of large-scale networks throughout the cortex. Importantly, neuroimaging studies have shown that the crucial brain region that enables us to flexibly make adjustments is the prefrontal cortex (PFC). In this thesis I present four case studies that investigated brain oscillations (as recorded in the EEG and MEG signal) in the time-frequency- (TFR), amplitude-time- (ERP), and source domain to determine how the language system relates to general executive functions. The materials employed structures that are amongst the most well-studied in psycholinguistic research: locally ambiguous garden-path sentences (e.g. “The nurse examined by the doctor was not on duty”), gender-agreement mismatches in anaphora and cataphora (e.g.“The king left London after reminding himself/herself about the letter”/ “After reminding himself/herself about the letter, the king left London.”), and syntactically complex garden-path sentences (“The receptionist realized that the nurse examined by the doctor was not on duty.”).The results in this thesis support the notion that there is indeed a connection between the language system and general executive functions during linguistic conflict resolution. Still, there are also situations where specialized ‘modules’ perform conflict resolution in a highly automatised fashion, particularly when contextual information sufficiently cues future input. However, as soon as increased uncertainty comes into play or capacity limits are reached, the brain appears to rely on extremely flexible mechanisms in prefrontal cortex regions.
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Shaw, Jacqueline. "Contextualising empowerment practice : negotiating the path to becoming using participatory video processes". Thesis, London School of Economics and Political Science (University of London), 2012. http://etheses.lse.ac.uk/400/.
Testo completoAbstract (sommario):
Participation and empowerment are major drivers of social policy, but participatory projects often happen within contested territory. This research interrogates the assumed participation-empowerment link through the example of participatory video. Fieldwork unpacks the particular approach of Real Time, an established UK project provider. Disrupting representational framing, the emergent relational processes catalysed were explored in context, to address not whether participatory video can increase participants’ influence, but how and in what circumstances. This thesis therefore builds more nuanced understanding of empowerment practice as the negotiated (rhizomic) pathway between social possibility and limitation. Following Deleuze, a becoming ontology underpinned study of project actors’ experiences of the evolving group processes that occurred. An action research design incorporated both collaborative sense-making and disruptive gaze. Analysis draws on interpersonal and observational data gathered purposively from multiple perspectives in 11 Real Time projects between 2006 and 2008. Five were youth projects and six with adults, two were women-only and one men-only, two with learning-disabled adults and four aimed at minority-ethnic participants. Participatory video as facilitated empowerment practice led to new social becoming by opening conducive social spaces, mediating interactions, catalysing group action and re-positioning participants. Videoing as performance context had a structuring and intensifying function, but there were parallel risks such as inappropriate exposure when internal and external dialogical space was confused. A rhizomic map of Real Time’s non-linear practice territory identifies eight key practice balances, and incorporates process possibilities, linked tensions, and enabling and hindering factors at four main sequential stages. Communicative action through iteratively progressing video activities unfolded through predictable transitions to generate a diversifying progression from micro to mezzo level when supported. This thesis thus shows how participatory video is constituted afresh in each new context, with the universal and particular in ongoing dynamic interchange during the emergent empowerment journey.
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Carslaw, Gregory. "Agent based modelling in social psychology". Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4068/.
Testo completoAbstract (sommario):
Agent based modelling is a tool that has been successful in developing theories in a wide range of fields, but its application to social psychology is still in its infancy. This body of work applies the agent based modelling method to areas of social psychology including contact theory, group dynamics, altruistic behaviour and social identity theory. In each of these areas an agent based model is introduced that furthers the relevant theories and taken together these models demonstrate the effectiveness of some of the techniques outlined in existing research as well as producing a unique recommendation for the applications of agent based modelling in social psychology. In the fourth and fifth chapters three existing agent based models are extended in line with multiple identity theory and doing so produces novel results that improve upon the explanations of the original models. Therefore it is concluded that for agent based modelling in social psychology it is important to always consider the impact of multiple identities upon our modelling efforts rather than always simulating the minimum group identities necessary to test a hypothesis.
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Mitzman, Susan Fiona. "Clinically depressed adults' idiographic goals and causal explanations". Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4089/.
Testo completoAbstract (sommario):
Background: Goal motivational factors alone do not fully account for depression and having vague future goals is thought to contribute to depression. This study seeks to extend the goal theory literature by investigating the specificity of clinically depressed adults’ idiographic approach and avoidance goals and their associated causal explanations. The content of depressed adults’ personal goals is also explored. Method: Specificity coding schemes for goals and causal explanations, and goal content coding schemes, were applied to an established data set comprising adult, clinically depressed (n = 21) and control samples (n = 24). Results: Participants generated, overall, more over-general approach goals than avoidance goals. As predicted, depressed participants compared to controls, generated more over-general goals than specific goals. Depressed adults also generated more over-general causal explanations than controls for all types of reasons and goals, except pro-reasons for avoidance goals. Differences were also found between the depressed group, and the control group, in relation to goal content. Conclusions: Adults with clinical depression appear to be markedly compromised by; their difficulty in formulating specific goals, the content and quality of their goals, and their difficulty in formulating specific reasons for goal accomplishment.
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Bradley, Paul. "The family experience of frontotemporal dementia : a qualitative study". Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/403/.
Testo completoAbstract (sommario):
Overview This thesis is submitted in partial fulfilment for the requirements of the degree of Doctor of Clinical Psychology at the School of Psychology, University of Birmingham. It comprises of a research and a clinical volume. Volume I Volume I is the research component of the thesis. It consists of two papers, the first of which is a review of the literature that uses ‘Theory of Mind’ (ToM) tasks with people with frontal-variant frontotemporal dementia (fvFTD). All the research identified is systematically appraised in terms of the methodology and the quality of the published reports. The evidence indicates that ToM is impaired in people with fvFTD; however more robust findings were evident from research which comprehensively measured neuropsychological functioning and used established and well known ToM tests. More recent research has diversified into exploring other aspects of social cognition, such as emotional processing and empathy, and their relationships with ToM. The nominated journal for this review paper is ‘Neuropsychologia’. The second paper is a qualitative research project that explores the experiences of family members of people living with fvFTD. The research questions were: How does the development of fvFTD in a working age person affect the family experience of living with that person, and how might mental health services respond to the needs of those family members? Individual in-depth interviews were carried out with six relatives (including partners, a sibling, and an adult child), and Interpretative Phenomenological Analysis (IPA) was used to analyse the data resulting in the emergence of four main themes. The findings demonstrate how family caregivers of people with fvFTD have to contend with specific behavioural challenges and personality changes associated with the condition. The study also indicates that knowledge about fvFTD is lacking in both carers and professionals alike, causing uncertainty and long periods waiting for a diagnosis, which adds to the burden of care for these people. Services need to be developed to cater for specific individual needs and awareness needs to be raised in all health care services. The nominated journal for this research paper is ‘Dementia: The International Journal of Social Research and Practice’. Volume II Volume II is the clinical component of the thesis, which consists of five clinical practice reports (CPRs) that describe and evaluate clinical work carried out during clinical placements throughout the training course. The first CPR ‘Psychological Models’ formulates the case of an 18-year-old woman with anxiety symptoms from a systemic and a cognitive perspective. The second CPR ‘Small Scale Service-Related Research Project’ is a qualitative evaluation of a drop-in service for young people leaving care. The third CPR ‘Single Case Experimental Design’ evaluates the intervention designed to support a woman with a moderate learning disability and behaviour that challenged services. The fourth CPR ‘Case Study’ details the neuropsychological assessment of an 81-year-old man with memory problems. The fifth CPR was presented orally and it describes the use of Cognitive Analytic Therapy with a woman presenting with anxiety following treatment for breast cancer. The abstract is included here only.
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Gilbert, Nicola. "Disclosure of eating disorders and subsequent help seeking". Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/428/.
Testo completoAbstract (sommario):
The severe consequences of having an eating disorder can be minimised by early treatment access. However, most individuals experience lengthy delays in accessing help. This review aimed to systematically evaluate the empirical literature relating to the barriers and facilitators that might influence these delays, for individuals with eating psychopathology. Twenty empirical studies were reviewed. Evidence for potential barriers included: 1) logistical difficulties, 2) ethnicity and acculturation, 3) poor mental health literacy, 4) self-reliance, and 5) social and interpersonal fears. Potential facilitators included: 1) problem recognition, 2) interventions to enhance recognition, 3) impairment of functioning and health, and 4) severity of eating disordered symptoms. More complex studies are required to establish the directional influence of these factors on help seeking. A shift in focus from resactive facilitators, such as symptom severity, towards the factors that might operate earlier on in the help seeking process, is more likely to generate ideas and interventions to achieve earlier treatment access.
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Shahid, Aisha. "Using word frequency and parafoveal preview to determine the locus of contextual predictability and imageability effects : evidence from eye movements during reading and lexical decision". Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5242/.
Testo completoAbstract (sommario):
The present thesis examines the time course of two semantic variables, contextual predictability and word imageability. Both variables can be said to reflect semantic aspects of meaning. For example the contextual predictability of a given target indicates the semantic context within which the target word occurs. The imageability of a given word reflects the meaning aspects of the word itself (Whaley, 1978). The word frequency effect (the faster response to commonly used high frequency words compared to low frequency words which occur less often) was taken to index the moment of lexical access (Balota, 1990; Pollatsek & Rayner, 1990; Sereno & Rayner, 2003) and by applying the logic of additive factors method (Sternberg, 1969a, 1969b), we determined whether the combined effect of each respective semantic variable was additive or interactive. This allowed us to examine whether there are semantic influences on lexical access. Previous research has been undecided and the question remains as to whether semantic variables operate during the lexical access processing stage, or alternatively after lexical access, for example in the post-lexical stage (e.g., Hand, Miellet, Sereno & O’Donnell, 2010; Sereno, O’Donnell & Rayner, 2006). Another aim of the thesis was to address the issue concerning the information presented to participants in the condition of ‘invalid parafoveal preview of a target’ (e.g., Sereno & Rayner, 2000). Several criteria were identified as being important in order to make the assumption that parafoveal processing was successfully inhibited on the pre-target fixation. Another aim of the thesis was to investigate whether word frequency and contextual predictability of the parafoveal word affected parafoveal preview benefit. Preview benefit was calculated by subtracting fixation durations in a condition of ‘valid’ preview of the target with an ‘invalid’ preview of the target. Experiment 1 utilised a lexical decision task to investigate the relationship between word frequency and the imageability of the word. Experiment 2 investigated whether the orthogonal manipulation of word frequency and contextual predictability led to an additive or interactive relationship between these two variables. Two pre-tests, the rating and Cloze tasks, were used to determine the predictability of the target. Experiment 3 and a further cross comparison of Experiments 2 and 3 replicated and extended Experiment 2 by additionally using an eye movement-contingent boundary change paradigm (Rayner, 1975). Experiment 4 examined the joint and combined effects of frequency, predictability and preview in a within-subjects design. A separate pre-test Cloze task was used to determine predictability of targets in their low and high predictable contexts. This experiment used a larger set of materials than in the previous experiments to examine these variables. Finally Chapter 6 was an overall discussion of the thesis. It was concluded that display screen presentations in our eye tracking experiments led to very fast reading times (as well as more skipping) compared to past studies which have used dot-matrix display presentations. It is possible that faster fixation durations led to floor effects in conditions where reading times are already fast because of preferential circumstances of high frequency targets, high predictable contexts and being given a parafoveal preview of the target. Possible ways to counteract this floor effect as well as alternative experimental methods of investigation were discussed.
Libri sul tema "Bf 408"
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Molesworth, Carl. P-40 warhawk vs Bf 109: Mto 1942-44. Oxford, UK: Osprey, Publishing, 2011.
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Schreiber, H. (Herrmann). 400 schémas : Audio, sono, hi-fi, BF. Dunod, 1993.
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A whack on the side of the head: How you can be more creative. Stamford, CT: U.S. Games Systems, 1990.
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Weal, John, e Boris Ciglic. Croatian Aces of World War 2 (Osprey Aircraft of the Aces, 49). Osprey Publishing, 2002.
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Gladwell, Malcolm. Blink: Inteligencia intuitiva por qué sabemos la verdad en dos segundos? 2017.
Cerca il testo completoAtti di convegni sul tema "Bf 408"
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HAYASHI, Toshio, Shouichi AKITA e Makoto MIHOYA. "26 Development of “BF-Coat” for Snowmobile Piston". In Small Engine Technology Conference & Exposition. 10-2 Gobancho, Chiyoda-ku, Tokyo, Japan: Society of Automotive Engineers of Japan, 2002. http://dx.doi.org/10.4271/2002-32-1795.
Testo completoAbstract (sommario):
<div class="htmlview paragraph">The pistons in a snowmobile engine are subjected to severe temperature conditions not only because snowmobiles are operated in extremely cold temperatures but also because the engine has a high output per unit volume of approximately 150kW/liter. The temperature of the piston top may go from -40°C (when a cold engine is started) to 400°C or higher (when the engine is running at full load). When the piston and cylinder inner wall are cold, the performance of the lubricating oil drops; when they are hot, scuffing may be produced by problems such as tearing of the oil film between the piston and cylinder. When the engine is run at full load for a long time, moreover, the piston is subjected to prolonged high-temperature use, which is conducive to the production of piston boss hole abrasion and ring groove adhesive wear.</div> <div class="htmlview paragraph">There are many piston surface coatings available to resolve these problems, but we use BF-Coat (Black-Fluoro Compound Coating) on the pistons in our 2-stroke snowmobile engines. BF-Coat has the abrasion resistance of anodic oxide coating and excellent sliding characteristics. By coating the entire piston surface with BF-Coat, we have developed a high-quality piston with a more scuff-resistant skirt and abrasion-resistant pin hole, and a ring groove that is more resistant to adhesive wear.</div>
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Zhang, Xianxian, e John H. L. Hansen. "CFA-BF: a novel combined fixed/adaptive beamforming for robust speech recognition in real car environments". In 8th European Conference on Speech Communication and Technology (Eurospeech 2003). ISCA: ISCA, 2003. http://dx.doi.org/10.21437/eurospeech.2003-409.
Testo completo
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Hermassi, Souhail, Lawrence D. Hayes e René Schwesig. "Physical Fitness and Academic Performance in Normal Weight, Overweight, and Obese Schoolchildren in Qatar: A Pilot Study for Physical Education Perspective". In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2021. http://dx.doi.org/10.29117/quarfe.2021.0080.
Testo completoAbstract (sommario):
Childhood obesity and loss of physical fitness are rising problems internationally. Although research concerning mitigation strategies has been enforced, empirical results until now fail to address problems and needs of the Gulf region, which has unique geographical and cultural features. Therefore, this study investigated academic performance and physical fitness in normal, overweight, and obese child handball athletes in Qatar. Measurements included anthropometric data (BMI and body fat percentage (%BF)), and physical performance tests: agility T-half test; squat jump (SJ), and countermovement jump (CMJ), 10 and 15 m sprint; medicine ball throw. Aerobic capacity was evaluated using the Yo-Yo Intermittent Recovery Test level 1. Academic achievement was assessed through school records of grades point average (GPA) of Mathematics, Science and Arabic. With the exception of medicine ball throw (obese: 4.08 ± 1.05 m) and sprinting parameters (overweight: 10 m: 2.43 ± 0.35 s, 15 m: 3.60 ± 0.46 s), athletes from the normal weight group showed the highest performance level in all parameters. Between group differences existed for the T-Half Test (p = 0.035, ηp2 = 0.190), CMJ (p = 0.001, ηp2 = 0.363) and SJ (p = 0.007, ηp2 = 0.269). For CMJ and SJ, the comparison between overweight and normal weight also yielded a difference (CMJ: p = 0.005; SJ: p = 0.009). The academic parameters generated the largest difference between groups for science (p = 0.057; ηp2 = 0.164). For all parameters studied, the normal weight group had the highest performance level. In contrast, the overweight group showed the lowest level of academic performance. These findings suggest being overweight or obese are related to science academic performance among schoolchildren in Qatar. Physical education teachers should be cognizant that health promotion interventions improving composition may have the additional potential to improve dimensions of academic performance.
Rapporti di organizzazioni sul tema "Bf 408"
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Kirchhoff, Helmut, e Ziv Reich. Protection of the photosynthetic apparatus during desiccation in resurrection plants. United States Department of Agriculture, febbraio 2014. http://dx.doi.org/10.32747/2014.7699861.bard.
Testo completoAbstract (sommario):
In this project, we studied the photosynthetic apparatus during dehydration and rehydration of the homoiochlorophyllous resurrection plant Craterostigmapumilum (retains most of the photosynthetic components during desiccation). Resurrection plants have the remarkable capability to withstand desiccation, being able to revive after prolonged severe water deficit in a few days upon rehydration. Homoiochlorophyllous resurrection plants are very efficient in protecting the photosynthetic machinery against damage by reactive oxygen production under drought. The main purpose of this BARD project was to unravel these largely unknown protection strategies for C. pumilum. In detail, the specific objectives were: (1) To determine the distribution and local organization of photosynthetic protein complexes and formation of inverted hexagonal phases within the thylakoid membranes at different dehydration/rehydration states. (2) To determine the 3D structure and characterize the geometry, topology, and mechanics of the thylakoid network at the different states. (3) Generation of molecular models for thylakoids at the different states and study the implications for diffusion within the thylakoid lumen. (4) Characterization of inter-system electron transport, quantum efficiencies, photosystem antenna sizes and distribution, NPQ, and photoinhibition at different hydration states. (5) Measuring the partition of photosynthetic reducing equivalents between the Calvin cycle, photorespiration, and the water-water cycle. At the beginning of the project, we decided to use C. pumilum instead of C. wilmsii because the former species was available from our collaborator Dr. Farrant. In addition to the original two dehydration states (40 relative water content=RWC and 5% RWC), we characterized a third state (15-20%) because some interesting changes occurs at this RWC. Furthermore, it was not possible to detect D1 protein levels by Western blot analysis because antibodies against other higher plants failed to detect D1 in C. pumilum. We developed growth conditions that allow reproducible generation of different dehydration and rehydration states for C. pumilum. Furthermore, advanced spectroscopy and microscopy for C. pumilum were established to obtain a detailed picture of structural and functional changes of the photosynthetic apparatus in different hydrated states. Main findings of our study are: 1. Anthocyan accumulation during desiccation alleviates the light pressure within the leaves (Fig. 1). 2. During desiccation, stomatal closure leads to drastic reductions in CO2 fixation and photorespiration. We could not identify alternative electron sinks as a solution to reduce ROS production. 3. On the supramolecular level, semicrystalline protein arrays were identified in thylakoid membranes in the desiccated state (see Fig. 3). On the electron transport level, a specific series of shut downs occur (summarized in Fig. 2). The main events include: Early shutdown of the ATPase activity, cessation of electron transport between cyt. bf complex and PSI (can reduce ROS formation at PSI); at higher dehydration levels uncoupling of LHCII from PSII and cessation of electron flow from PSII accompanied by crystal formation. The later could severe as a swift PSII reservoir during rehydration. The specific order of events in the course of dehydration and rehydration discovered in this project is indicative for regulated structural transitions specifically realized in resurrection plants. This detailed knowledge can serve as an interesting starting point for rationale genetic engineering of drought-tolerant crops.