Academic literature on the topic 'PPCT model'
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Journal articles on the topic "PPCT model"
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Walls, Jill K. "A Theoretically Grounded Framework for Integrating the Scholarship of Teaching and Learning." Journal of the Scholarship of Teaching and Learning 16, no. 2 (April 29, 2016): 39–55. http://dx.doi.org/10.14434/josotl.v16i2.19217.
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SoTL scholars have written about the importance and utility of teaching from a guiding theoretical framework. In this paper, ecological theory and specifically Bronfenbrenner’s Process, Person, Context, Time (PPCT) model, is examined as a potential framework for synthesizing SoTL research findings to inform effective teaching at the college level. A general overview of the PPCT model of human development and its connections to current topics and areas of inquiry in the SoTL literature are provided. The benefit of adopting an ecologically-based framework to better understand and exploit the interdisciplinary nature of SoTL is discussed.
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Vincenti, Virginia B., and Ashton Chapman. "ELDER FAMILY FINANCIAL EXPLOITATION BY POWER-OF-ATTORNEY AGENTS THROUGH THE LENS OF BRONFENBRENNER’S PPCT MODEL." Innovation in Aging 3, Supplement_1 (November 2019): S384. http://dx.doi.org/10.1093/geroni/igz038.1410.
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Abstract This paper presents a subset of qualitative data from a phenomenological study of 3 men and 17 women (N=20) from families with designated power of attorney (POA) agents who allegedly perpetrated elder family financial exploitation (EFFE). Participants were aged 22 to 63 (M = 43.5) with varying educational and income levels. The study explored EFFE by POA within Bronfenbrenner’s PPCT model. Data were analyzed using a thematic, inductive approach. Person characteristics (e.g. perpetrators’ personality and victims’ cognitive functioning), proximal processes (e.g. family patterns of communication and resource sharing), context (e.g. geographic location), and time (e.g. prevailing legal, economic, and cohort factors) emerged as relevant for EFFE experiences. Given that EFFE helping professionals (e.g., attorneys, practitioners) often lack training in family- or systems-focused dynamics and interventions, implications and applications of the PPCT model will be discussed with the goal of raising awareness of factors related to EFFE identification and prevention.
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Gilligan, Megan, Axton Betz-Hamilton, and Ashton Chapman. "ADDRESSING THE THEORETICAL GAPS IN ELDER FAMILY FINANCIAL EXPLOITATION." Innovation in Aging 3, Supplement_1 (November 2019): S384. http://dx.doi.org/10.1093/geroni/igz038.1409.
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Abstract A systematic review of elder family financial exploitation (EFFE) literature from the past five years reflects limited use or consensus of theoretical perspectives. In this paper, we propose using Bronfenbrenner’s Bioecological Theory to frame the dynamic, interrelated factors associated with EFFE. Bronfenbrenner’s Bioecological Theory, specifically the PPCT model includes Proximal processes, Person characteristics, Contextual systems, and Time. Proximal processes are increasingly complex interactions between individuals (e.g., family communication). Person characteristics include demand (e.g., gender, age), resource (e.g., education), and force (e.g., temperament) characteristics affecting interactions. Contextual levels drawn from Bronfenbrenner’s original model (e.g., micro, meso, exo, and macro) emphasize the effect of interrelated systems on development. T refers to Time, including changes occurring in time (e.g., longitudinal) and over time (e.g., historical). Collectively, the PPCT model provides a framework for understanding the iterative, complex factors linked to EFFE.
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Bolkan, Cory, Marlene Stum, and Pamela B. Teaster. "ELDER FINANCIAL ABUSE IN FAMILIES: EXPANDING THEORY AND RESEARCH." Innovation in Aging 3, Supplement_1 (November 2019): S383. http://dx.doi.org/10.1093/geroni/igz038.1406.
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Abstract Elder family financial exploitation (EFFE) is widespread and increasing. The effect is devastating, causing significant financial losses, reducing health and well-being of elders, and disrupting family systems. Research reveals that most (90%) perpetrators are family members or trusted others and researchers typically focus on identification of the problem, rather than understanding how and why exploitation occurs within the family unit. Furthermore, limited consensus exists regarding a theoretical understanding of the complexities of EFFE. Theory-driven, empirical explanations of how and why EFFE transpires are urgently needed to enhance and deepen intervention and prevention efforts. In this symposium, we extend both theory and research by using a common theoretical lens to present research findings from three distinct EFFE studies. The first paper reviews the current literature on EFFE and theory and introduces Bronfennbrenner’s bioecological Process-Person-Context-Time (PPCT) model as an under-utilized, but useful framework for understanding EFFE. The second paper reports on findings from in-depth interviews with non-perpetrator family members who experienced EFFE and will highlight complex intergenerational family systems processes in PPCT. The third paper highlights findings from a national study of substantiated and investigated cases of EFFE in which family member perpetrators were designated as surrogate decision makers. The fourth paper shares results from a qualitative study of family member POAs and how components of the PPCT model can be interpreted for use by helping professionals assisting families. We will also focus on the opportunities and challenges of developing theoretically sound EFFE research and the implications for improving practice and policy.
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Vincenti, Virginia B., and Ashton Chapman. "UNDERSTANDING RISK AND PROTECTIVE FACTORS FOR ELDER FAMILY FINANCIAL EXPLOITATION: A PREVENTIVE APPROACH." Innovation in Aging 3, Supplement_1 (November 2019): S193. http://dx.doi.org/10.1093/geroni/igz038.694.
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Abstract This paper presents qualitative data from a phenomenological study of 10 men and 38 women (N=48) within families with designated power of attorney (POA) agents. Participants were from 18 states nationwide, aged 20 to 73 (M = 46.6), and had varying educational and income levels. Eighteen individuals alleged that EFFE occurred in their families, 27 did not, and three didn’t know. The study explored EFFE risk and protective factors within Bronfenbrenner’s PPCT model (Tudge, 2018). Data were analyzed using a thematic, inductive approach. Specifically, person characteristics (e.g. perpetrators’ personality and victims’ cognitive functioning), proximal processes (e.g. family patterns of communication and resource sharing), context (e.g. geographic location), and time (e.g. prevailing legal, economic, and cohort factors) were associated with EFFE recognition and intervention. Implications and applications of the PPCT model for helping professionals (e.g., practitioners such as healthcare providers, attorneys, therapists) will be discussed to raise awareness of risk and protective factors within families that may increase or decrease the likelihood that elder financial exploitation by family members will occur. The goal is to improve prevention through helping families address risk factors before older relatives become dependent, encouraging more proactive planning in development of POA and other end-of-life documents, and detect exploitation early.
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Siraj, Iram, and Runke Huang. "Operationalizing Bronfenbrenner’s PPCT Model in Researching Human Development: Commentary on Xia, Li, and Tudge." Human Development 64, no. 1 (2020): 21–25. http://dx.doi.org/10.1159/000508341.
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Westhoff, Peter, Per Svensson, Karin Ernst, Oliver Bläsing, Janet Burscheidt, and Jörg Stockhaus. "Molecular Evolution of C4 Phosphoenolpyruvate Carboxylase in the Genus Flaveria." Functional Plant Biology 24, no. 4 (1997): 429. http://dx.doi.org/10.1071/pp97006.
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C4 plants are known to be of polyphyletic origin and have evolved independently several times during the evolution of angiosperms. We are interested in understanding the molecular changes that the C4 genes have undergone as they were adapted to their new functions in C4 photosynthesis and are using the C4 phosphoenolpyruvate carboxylase (PEPC) of the genus Flaveria as a model. The PEPCs of F. trinervia (C4) and F. pringlei (C3) are encoded by a gene family that is composed of at least three different gene classes named ppcA, ppcB and ppcC. The C4 PEPC of F. trinervia is encoded by the ppcA gene class and is expressed at high levels only in the mesophyll cells of the leaves. The nearest neighbour to the ppcA gene class of F. trinervia is found in F. pringlei. Comparisons of this pair of orthologous gene classes are used to identify the C4 -specific differences between the enzymatic properties of the ppcA PEPCs and the activities of the ppcA promoters. The two ppcA PEPCs are 96% identical, but differ in the Km for phosphoenolpyruvate (PEP) and their inhibition by malate. Chimerical PEPCs are presently constructed to map the differences in the enzymatic properties of the C4 and C3 PEPC isoforms. To investigate determinants for the C4 specific expression pattern, the 5´ flanking regions of the ppcA1 genes of F. trinervia and F. pringlei were fused to the uidA reporter gene encoding ß-glucuronidase and transformed into the C4 plant F. bidentis and the C3 species tobacco. In F. bidentis, the C4ppcA1 promoter drives a high level of expression of the transgene only in the mesophyll cells, while the C3ppcA1 promoter leads to low levels of expression in leaves, stems and roots. Determinants for the C4 specific expression of the ppcA1 gene of F. trinervia must therefore be located in the 5´-flanking region of this gene. Further analyses showed that two regions, a proximal and a distal segment, are sufficient to generate the C4 specific expression pattern. In tobacco, the C4ppcA1 promoter is preferentially expressed in the palisade parenchyma cells of the leaves. These results indicate that the major events during the evolution of the C4ppcA promoter occurred at the promoter level.
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Fang, Lei, Ellen Crocker, Jian Yang, Yan Yan, Yuanzheng Yang, and Zhihua Liu. "Competition and Burn Severity Determine Post-Fire Sapling Recovery in a Nationally Protected Boreal Forest of China: An Analysis from Very High-Resolution Satellite Imagery." Remote Sensing 11, no. 6 (March 13, 2019): 603. http://dx.doi.org/10.3390/rs11060603.
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Anticipating how boreal forest landscapes will change in response to changing fire regime requires disentangling the effects of various spatial controls on the recovery process of tree saplings. Spatially explicit monitoring of post-fire vegetation recovery through moderate resolution Landsat imagery is a popular technique but is filled with ambiguous information due to mixed pixel effects. On the other hand, very-high resolution (VHR) satellite imagery accurately measures crown size of tree saplings but has gained little attention and its utility for estimating leaf area index (LAI, m2/m2) and tree sapling abundance (TSA, seedlings/ha) in post-fire landscape remains untested. We compared the explanatory power of 30 m Landsat satellite imagery with 0.5-m WorldView-2 VHR imagery for LAI and TSA based on field sampling data, and subsequently mapped the distribution of LAI and TSA based on the most predictive relationships. A random forest (RF) model was applied to assess the relative importance and causal mechanisms of spatial controls on tree sapling recovery. The results showed that pixel percentage of canopy trees (PPCT) derived from VHR imagery outperform all Landsat-derived spectral indices for explaining variance of LAI (R2VHR = 0.676 vs. R2Landsat = 0.427) and TSA (R2VHR = 0.508 vs. R2Landsat = 0.499). The RF model explained an average of 55.5% (SD = 3.0%, MSE = 0.382, N = 50) of the variation of estimated LAI. Understory vegetation coverage (competition) and post-fire surviving mature trees (seed sources) were the most important spatial controls for LAI recovery, followed by burn severity (legacy effect), topographic factors (environmental filter) and nearest distance to unburned area (edge effect). These analyses allow us to conclude that in our study area, mitigating wildfire severity and size may increase forest resilience to wildfire damage. Given the easily-damaged seed banks and relatively short seed dispersal distance of coniferous trees, reasonable human help to natural recovery of coniferous forests is necessary for severe burns with a large patch size, particularly in certain areas. Our research shows the VHR WorldView-2 imagery better resolves key characteristics of forest landscapes like LAI and TSA than Landsat imagery, providing a valuable tool for land managers and researchers alike.
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Hafezolghorani Esfahani, M., F. Hejazi, R. Vaghei, E. Nikbakht, and D. C. J. Tze. "Development of Constitutive Model for Precast Prestressed Concrete Segmental Columns." Modelling and Simulation in Engineering 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/9453649.
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The interest of using precast segmental columns in construction of concrete bridges has significantly increased in recent years. One research area of concrete bridges is the application of Precast Prestressed Concrete Segmental (PPCS) Column in any structural analysis software or FE program code. Modeling a PPCS column, which consists of various materials with interaction between them, is complicated and time-consuming. This research attempts to formulate the stiffness matrix of PPCS columns in order to form the constitutive model in linear form to evaluate the response of the columns. A two-dimensional finite element model is presented in the finite element package ANSYS. Parametric studies are conducted by finite element models to verify the constitutive models for the PPCS column with a different number of concrete segments. Comparison between the constitutive model and the FE program results indicates that the constitutive model is accurate enough to predict the deformation of the PPCS columns.
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Mimno, David, David M. Blei, and Barbara E. Engelhardt. "Posterior predictive checks to quantify lack-of-fit in admixture models of latent population structure." Proceedings of the National Academy of Sciences 112, no. 26 (June 12, 2015): E3441—E3450. http://dx.doi.org/10.1073/pnas.1412301112.
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Admixture models are a ubiquitous approach to capture latent population structure in genetic samples. Despite the widespread application of admixture models, little thought has been devoted to the quality of the model fit or the accuracy of the estimates of parameters of interest for a particular study. Here we develop methods for validating admixture models based on posterior predictive checks (PPCs), a Bayesian method for assessing the quality of fit of a statistical model to a specific dataset. We develop PPCs for five population-level statistics of interest: within-population genetic variation, background linkage disequilibrium, number of ancestral populations, between-population genetic variation, and the downstream use of admixture parameters to correct for population structure in association studies. Using PPCs, we evaluate the quality of the admixture model fit to four qualitatively different population genetic datasets: the population reference sample (POPRES) European individuals, the HapMap phase 3 individuals, continental Indians, and African American individuals. We found that the same model fitted to different genomic studies resulted in highly study-specific results when evaluated using PPCs, illustrating the utility of PPCs for model-based analyses in large genomic studies.
Dissertations / Theses on the topic "PPCT model"
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Gabi, Controllah. "Person, process, context, time : a bioecological perspective on teacher stress and resilience." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/person-process-context-time-a-bioecological-perspective-on-teacher-stress-and-resilience(995d835a-568f-4603-9e63-41920628b205).html.
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This study focused on stress and resilience among teachers in 15 urban secondary schools serving areas of multiple and complex disadvantage in the Greater Manchester and Merseyside regions of England (UK). It utilised the mixed-methods approach to gather and analyse the data. This consisted of a questionnaire survey of 150 teachers and interviews of 20 teachers. It examined person characteristics of teachers in these schools; key stress risks in the schools; coping strategies employed by these teachers and their protective factors. The main quantitative analysis methodologies used in the study were descriptive analysis; factor analysis and regression analysis. Qualitative findings were analysed using thematic analysis and teacher pen portrait and school case study presentations. Integrative analysis of quantitative and qualitative findings was then conducted in the discussion of main findings. This study found that the teachers’ major force characteristics were self-efficacy; persistence; personal attitudes towards one’s job; personality and temperament and commitment to the job. Their main resource characteristic was experience while their major demand characteristic was their professional role. These teachers were also exposed to person, proximal processes, context and time risks. There were risks associated with force and demand person characteristics. The main process risks were within their interactions with pupils, parents, colleagues and senior management. There were also context risks in their microsystem, mesosystem, exosystem and macrosystem. There were also time risks across the microtime, mesotime and macrotime. To cope, teachers in this sample utilised both direct-action and palliative coping strategies. Results also indicated that these teachers’ protective factors were in their resource and force characteristics; proximal processes; context and time.
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Isobell, Deborah Louise. "Referring agents’ perceptions of access barriers to inpatient substance abuse treatment centres in the Western Cape." University of the Western Cape, 2013. http://hdl.handle.net/11394/4060.
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Masters of ArtHigh rates of substance use and its associated problems afflict Cape Town, underscoring the need for easily accessible substance abuse treatment. Despite the substantial benefits for both individuals and society at large that substance abuse treatment confers, substance abusers often first have to negotiate considerable challenges in order to access treatment and accumulate these gains. That is, experiencing barriers to accessing treatment, together with the presence of socio-demographic features, rather than “need for treatment”, decides who accesses treatment. Referrals are the gateway to inpatient substance abuse treatment in the Western Cape. While several barriers to accessing treatment have been identified by prior studies, none examine these phenomena from the point of view of the agents responsible for referring substance users for treatment. Moreover, access barriers to inpatient substance abuse services are a neglected area in extant literature. To address this gap, this study explored the perceptions of referring agents‟ of the barriers to accessing state-funded inpatient substance abuse treatment centres in the Western Cape. This enabled the researcher to compare existing access barriers to treatment as identified by prior research, to those elucidated in the study. Bronfenbrenner‟s Process-Person-Context-Time model was employed as the basis for understanding identified barriers. In accordance with the exploratory qualitative methodological framework of the study, six semi-structured individual in-depth interviews were conducted with referring agents‟ of differing professional titles who were purposefully selected and expressed a willingness to participate in the study. Interviews were audio-recorded, and transcripts were analysed and interpreted by means of Thematic Analysis. Two broad thematic categories of access barriers were identified: Person-related barriers (denial, motivation for treatment, gender considerations, disability, active TB disease, homelessness, psychiatric co-morbidity) and Context-related barriers to treatment (cultural and linguistic barriers, stigma, community beliefs about addiction and treatment, awareness of substance abuse treatment, affordability/ financial barriers, geographic locations of treatment facilities, waiting time, lack of collaboration within the treatment system, beliefs of service providers‟, lack of facilities/ resources within the treatment system, practices at inpatient facilities, referral protocol and uninformed staff). Results suggest that by targeting the aforementioned barriers, access to inpatient and outpatient treatment services can be improved, and recommendations for interventions are offered in this regard. Ethical principles such as obtaining informed consent and ensuring confidentiality were abided by throughout the study and thereafter.
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Novotný, Ondřej. "Efektivní využití PPC systémů k propagaci výrobků a služeb na internetu." Master's thesis, Vysoká škola ekonomická v Praze, 2016. http://www.nusl.cz/ntk/nusl-262158.
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This thesis titled Effective Use PPC to promote products services on the Internet is focused on traditional systems AdWords from Google, Sklik from Seznam and attribution models in Google analytics. The theoretical part of the history of the Internet, the development of online marketing individual marketing tools forms of advertising. The practical part is divided according to the strategic focus of the campaign. Acquisition, performance and remarketing campaigns. The last part is the comparison of measurement conversions in these systems with Google Analytics. The aim is to propose suitable metrics for evaluating the effectiveness of campaigns, banner ad and according to their strategic focus right perspective on measurement conversions.
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Espejo, Lipacho Rodrigo Erik. "Desalineamiento del tipo de cambio real: efectos en la determinación de los precios relativos dentro la economía boliviana." Universidad Mayor de San Andrés. Programa Cybertesis BOLIVIA, 2010. http://www.cybertesis.umsa.bo:8080/umsa/2010/espejo_lr/html/index-frames.html.
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El presente trabajo busca determinar y cuantificar el desalineamiento del Tipo de Cambio Real respecto a su trayectoria de largo plazo, y los efectos que tiene dicho desalineamiento sobre los distintos sectores de la Economía Boliviana a partir del shock positivo de precios internacionales vivido a partir del año 2003 en el contexto mundial. Para dicho fin se ha dividido el mismo en tres partes. En una primera parte se identifica la situación de dicha variable al interior de nuestra economía y se plantea el periodo de estudio (1991 – 2008). En la segunda parte se plantea todo el marco teórico a utilizarse: Se presenta el modelo de PPC, mismo que se descarta, el modelo TNT para determinación del Tipo de Cambio Real, el cual finalmente se utiliza y un modelo de Booming Sector para una economía pequeña y abierta, el cual se utiliza para el testeo de Enfermedad Holandesa. La tercera parte es la de desarrollo a partir de series estadísticas para los modelos planteados en la segunda parte. Se utiliza el Modelo TNT para la obtención del Tipo de Cambio Real, utilizando la metodología de dos pasos de Engel – Granger. El primer paso consiste en plantear y determinar un Tipo de Cambio Real de Equilibrio a partir de variables que lo determinan (Fundamentos del Tipo de Cambio Real). El segundo paso determina la velocidad de ajuste del TCR hacia su trayectoria de equilibrio de largo plazo, luego de un shock externo. Para determinar la trayectoria de equilibrio de largo plazo es necesaria la eliminación de la tendencia para ello se utilizo el filtro de Hodrick y Prescott. A partir de lo anteriormente mencionado, se obtuvo una apreciación del Tipo de Cambio Real de 16% respecto a su trayectoria de equilibrio. Una vez obtenido el resultado que arroja apreciación del Tipo de Cambio Real, se utiliza el modelo de Booming Sector dividiendo a la economía en tres sectores y se corrobora insipiente presencia de Enfermedad Holandesa en la Economía Boliviana, cuantificándose el efecto causado por el boom de precios sobre el nivel de producción sobre los tres sectores en que se divide a la economía.
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Smrž, Marek. "Model e-reklamy ve zvoleném segmentu elektronického obchodu." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2010. http://www.nusl.cz/ntk/nusl-222573.
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Master’s thesis describes plus evaluates small firm that the deal with production plus sale ceramic performances. Work is divided on several part, in which survey especially on analysis e - commerce that the firm employs plus on his inadequacies, largely in the area e- advertising. Feature plus scope of employment is suggest mock - up e- advertising, that shall in connection with his costs viable.
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Niebuhr, Carin. "A Comparison of Evaluation Models for Handicap Intervention in a Head Start Program." DigitalCommons@USU, 1985. https://digitalcommons.usu.edu/etd/5951.
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The Model A and Model C Title I evaluation options were compared by using both options to measure the effectiveness of handicap intervention in a Head Start program. Two hundred three children in Jackson County (Oregon) were pretested with the Developmental Indicators of Learning Test (DIAL), the Peabody Picture Vocabulary Test (PPVT), the Visual-Motor Integration Scale (VMI), and the Carrow Elicited Language Inventory (CELI). The 43 children who scored below the predetermined cut-off level were placed in a six-month intervention program. One hundred forty-nine children remaining in the Head Start program in May were posttested with the same tests. Model A analysis of mean scores of the intervention group indicated significant score change on all three testing instruments. Model C analysis indicated no positive score change. It was posited that the Model A effect in this project was large because it combined a positive intervention effect with a positive general program effect. The Model C option showed no effect because the estimated nonintervention scores were very large due to the large positive score change in the nonintervention group.
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Ramos, Chavez Jose Ioav. "Design of high frequency operating mechatronic systems : tools and methods of characterization of electromagnetic couplings between electromechanic converters and power electronics converters." Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0075/document.
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De l’avion plus électrique, en passant par l’hybridation de véhicules automobiles et jusqu’aux implants cardiaques d’assistance circulatoire, la compacité est devenue le graal de l’électrotechnique embarquée moderne. En effet, la densité de puissance des systèmes électromécaniques ne cesse de s’accroitre. Ainsi, pour répondre aux besoins de forte intégration, les convertisseurs en électronique de puissance trouvent un vecteur de développement dans l’augmentation de leur température et des fréquences de fonctionnement mais aussi dans la réduction des temps de commutation des interrupteurs, leur permettant de réduire leurs pertes thermiques et ainsi, de réduire leurs besoins en refroidissement. Les moteurs et générateurs électriques évoluent avec des topologies aussi diverses qu’innovantes pour répondre aux besoins d’intégration, robustesse et sureté de fonctionnement. Particulièrement, les bobinages des moteurs sont les premiers éléments sur le front de bataille. Au sein du bobinage s’effectuent les échanges entre moteur et convertisseur. L’augmentation des contraintes fréquentielles et transitoires sous forme de fronts de courant et tension issus des ensembles d’électronique de puissance constituent des défis en termes de compatibilité électromagnétique (CEM) pour les systèmes embarqués. Le travail présenté ici est le fruit d’une étroite collaboration entre la société NOVATEM et le laboratoire Génie de Production de l’ENIT de Tarbes au travers d’un financement CIFRE, en association avec la plateforme Labceem de l’IUT de Tarbes. Il propose d’apporter des modèles prédictifs permettant de déterminer les conséquences de ces contraintes d’intégration dans les systèmes mécatroniques de puissance dès les premières étapes de leur conception. Les perturbations conduites dont la source HF est au sein des interrupteurs de puissance du convertisseur, sont façonnées par les impédances caractérisant le chemin de couplage dont le moteur fait partie intégrante. Ce travail vise à élaborer des méthodes et outils pour contribuer à l’étude prédictive de la compatibilité électromagnétique (CEM) des ensembles mécatroniques en essayant de couvrir une plage de fréquence allant de 0 à 300 MHz. Dans une première partie, un état de l’art est détaillé afin de délimiter le contexte et les frontières de l’étude. Puis, un deuxième chapitre porte sur la modélisation analytique de bobinages concentrés de moteurs électriques. Les modèles analytiques établis permettent de déterminer les paramètres de réseaux de circuits pour effectuer des simulations dans le domaine temporel et harmonique. Contrairement aux modèles comportementaux de moteurs répandus dans la littérature, les modèles ici synthétisés prennent en compte les paramètres physiques des bobinages. Ils donnent la possibilité à l’utilisateur de paramétrer les architectures de bobinages concentrés en changeant des paramètres tels que la géométrie des bobines, les matériaux d’isolation ou encore la perméabilité des culasses. Un troisième chapitre, détaille l’établissement d’une méthode rationnelle d’extraction numérique de paramètres fonctionnels et parasites des PCB multicouches de puissance. Cette méthode, de par la prise en compte de paramètres physiques, s’inscrit dans une logique générique et prédictive. Finalement, dans le dernier chapitre, les outils et méthodes précédemment établis sont appliqués à l’étude d’un système réel de motorisation de véhicule électrique développé par la société partenaire Novatem. Le caractère physique et prédictif de ces outils vise à permettre l’expérimentation virtuelle sur l’ensemble moteur-convertisseur sans la nécessité de prototypes. Ce dernier chapitre illustre l’intérêt d’une approche physique en modélisation pour la compatibilité électromagnétique de systèmes mécatroniquesFrom the more electrically operated aircraft, to the hybridization of motor vehicles, all the way to electromechanic cardiac implants, compactness has become the holy grail of modern embedded electrical engineering. Indeed, the power-to-weight ratio demands for electromechanical systems has greatly increased. To meet these high integration needs, power electronic converters find a vector of development by increasing their temperature and operating frequencies but also by reducing the switching time of power switches, thus enabling them to reduce their power losses and thereby reducing their cooling requirements. Electric motors and generators operate with various innovative topologies that meet integration, robustness and reliability needs. Motor windings, particularly, are the first motor components on the battle front. It is at the heart of the winding that occur the exchanges between motor and converter. In terms of electromagnetic compatibility (EMC) for embedded systems, the increased frequency and transient stresses in the form of current and voltage edges from the power electronic assemblies are considered steep challenges. The work presented herein is the result of a close cooperation between the company Novatem and the laboratory Génie de Production of ENIT de Tarbes, through CIFRE funding, in combination with the Labceem platform of IUT of Tarbes. Its aim is to develop predictive models that will serve to determine the consequences of such integration constraints in power mechatronic systems that are in the early stages of design. Conducted disturbances whose HF source is located at the inverter power switches are shaped by the impedances characterizing the coupling path of which the electrical machine is an integral part. This work proposes to develop methods and tools to support the predictive study of electromagnetic compatibility (EMC) of mechatronic assemblies, by attempting to cover a modeling frequency range that goes from 0 to 300 MHz’s. In the first chapter of this work, a literature review is detailed for the definition of the context and boundaries of the study. A second chapter focuses on the analytical modeling of concentrated windings in electric motors. The analytical models that are established allow determination of circuit networks settings to perform time- and frequency- domain simulations. Unlike the widespread behavioral models of electrical machine in the literature, the models that are synthesized here take into account the physical parameters of the coils. The user of such models is offered the opportunity to account for the different winding architectures, by changing core parameters such as geometry, insulation materials or permeability. A third chapter describes the establishment of a rational method for extraction of functional and parasitic parameters in multilayer Power PCBs. This method being of a generic and predictive logic aims to account for physical parameters. Finally, in the last chapter, the previously established tools and methods are applied to the study of a real electric vehicle drive system developed by the company Novatem. The physical and predictive value of these tools allows for execution of virtual experimentations on the motorconverter assembly without the need for prototypes. This chapter illustrates the value of a physical approach to modeling the electromagnetic compatibility of mechatronic systems
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Ludescher, Wagner. "Modelo para avaliação da qualidade de projetos de planos de continuidade de negócios aplicados a sistemas computacionais." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-10082011-142221/.
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Diante da constante necessidade de funcionamento ininterrupto dos sistemas computacionais, das mais diversas organizações, é imperativo que existam meios de continuidade dos negócios e recuperação de desastres implantados, testados e prontos para serem invocados. Diante disso, torna-se essencial a existência de uma maneira de avaliar se as informações, os procedimentos e o nível do conhecimento dos colaboradores da organização estão adequados para enfrentar uma ocorrência inesperada e devastadora no ambiente computacional da organização. A presente tese propõe um modelo hierárquico para se representar e avaliar a qualidade dos Projetos de Planos de Continuidade de Negócios (PPCN) aplicados a sistemas computacionais. Este modelo apresenta o mapeamento das principais características que esses planos devem possuir, de acordo com as principais normas relativas ao tema (BS 25999, ABNT NBR ISO/IEC 27001 e ABNT NBR ISO/IEC 27002), as experiências de especialistas da área e dados reais dos usuários dos PPCNs obtidos por meio da utilização de questionários. É proposto neste trabalho, também, um Índice de Qualidade (IQ) para os PPCNs que permite a comparação de um PPCN existente com um PPCN ideal, identificando-se os pontos fracos nele existentes e munindo a organização com informações para a busca de soluções que resultarão na melhoria do PPCN atual.Given the need for computer systems uninterrupted operation, for the most different organizations, it is imperative that business continuity and disaster recovery plans be already in place, tested and ready to be invoked. Given this, it is essential for there being a way to assess whether the information, procedures and organizations employees knowledge level are adequate to deal with an unexpected and devastating event in the organization\'s computing environment. This thesis proposes a hierarchical model to represent and assess the organizations computer systems Business Continuity Plan Project (BCPP) quality. This model maps the main features these plans should have, in accordance with the main standards related to this area (BS 25999, ISO/IEC 27001 and ISO/IEC 27002), specialists experience and real data from BCPPs users obtained from questionnaires. As a complementary proposal, a BCPP Quality Index (QI) is suggested, which will allow organizations to compare their existing BCPP against an ideal BCPP, identifying the gaps between these plans and providing the organization with information for seeking solutions that will result in the improvement of current BCPP.
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Morhardt, Ashley C. "Gross Anatomical Brain Region Approximation (GABRA): Assessing Brain Size,Structure, and Evolution in Extinct Archosaurs." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1470743129.
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Lee, Pei-Shan, and 李佩珊. "Relevant factors of school counselors'' agency : An examination of PPCT model." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/dr7nu9.
Full textBooks on the topic "PPCT model"
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Sliwa, Karen, and Denise Hilfiker-Kleiner. Peripartum cardiomyopathy. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0374.
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Pregnancy-related heart disease is increasing worldwide and peripartum cardiomyopathy (PPCM) is an important contributor to early (<42 days postpartum) and late (up to 1 year postpartum) maternal death. PPCM is an idiopathic form of cardiomyopathy, presenting with heart failure secondary to left ventricular dysfunction towards the end of pregnancy, or in the months following delivery, where no other cause of heart failure is identified. It is a diagnosis of exclusion. Incidence and prognosis varies according to geography and is likely due to multiple factors. The recent specific pathophysiological hypothesis which states that the oxidative stress–cathepsin D-16 kDa prolactin cascade plays a key role in the development of PPCM in experimental models and in humans suggests that a therapeutic approach involving blockade of this pathway with bromocriptine may be a novel disease-specific approach. Despite ongoing research, numerous uncertainties regarding the incidence, pathophysiology, treatment, and prognosis of PPCM patients remain, indicating the need for further investigation. The establishment of the international registry on PPCM, under the umbrella of the EuroObservational research programme, will provide novel information and address many uncertainties.
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Personalized Pediatric Coordinated Services (PPCS): A family-centered model of coordinated services for young children with chronic illness and disabilites. [Mantua, OH: Hattie Larlham Foundation, Community Services Dept., 1996.
Find full textBook chapters on the topic "PPCT model"
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Yancang, Li, and Hou Zhenguo. "PPC Model Based on ACO." In Lecture Notes in Electrical Engineering, 405–10. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14350-2_51.
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Yongxia, Wei, Zhao Yuyu, and Wang Xiaoyan. "Optimization of Corn Furrow Irrigation Modes Based on RAGA-PPC Model." In Communications in Computer and Information Science, 561–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-34041-3_78.
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Fan, Wentao, and Nizar Bouguila. "Generating Video Textures by PPCA and Gaussian Process Dynamical Model." In Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications, 801–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-10268-4_94.
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Shetty, Pradeep Kumar. "A Combined fBm and PPCA Based Signal Model for On-Line Recognition of PD Signal." In Lecture Notes in Computer Science, 229–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11590316_31.
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Sliwa, Karen, and Denise Hilfiker-Kleiner. "Peripartum cardiomyopathy." In ESC CardioMed, 1549–53. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0374_update_001.
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Pregnancy-related heart disease is increasing worldwide and peripartum cardiomyopathy (PPCM) is an important contributor to early (<42 days postpartum) and late (up to 1 year postpartum) maternal death. PPCM is a potentially life-threatening condition presenting with heart failure secondary to left ventricular dysfunction towards the end of pregnancy, or in the months following delivery, where no other cause of heart failure is identified. It is a diagnosis of exclusion. Incidence and prognosis varies according to geography and is likely due to multiple factors including also inherited or acquired cardiomyopathy-associated mutations. It seems that PPCM also shares common pathological pathways. For example, a ‘multiple-hit’ model including systemic angiogenic imbalance that derives from the oxidative stress-cathepsin D-16 kDa prolactin cascade and additional antiangiogenic factors plays a key role in the development of PPCM in experimental models and in humans suggests that a therapeutic approach involving blockade of this pathway with bromocriptine may be a novel disease-specific approach. Despite ongoing research, numerous uncertainties regarding the incidence, pathophysiology, treatment, and prognosis of PPCM patients remain, indicating the need for further investigation. The ongoing global registry on PPCM, under the umbrella of the EuroObservational research programme, has provided novel information.
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"Optimization Tool for PPC Advertisement Model." In International Conference on Software Technology and Engineering (ICSTE 2012), 87–90. ASME Press, 2012. http://dx.doi.org/10.1115/1.860151_ch15.
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Rashid, Tayyab, and Martin Seligman. "Positive Psychotherapy." In Positive Psychotherapy, edited by Tayyab Rashid and Martin Seligman, 3–7. Oxford University Press, 2018. http://dx.doi.org/10.1093/med-psych/9780195325386.003.0001.
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Positive psychotherapy (PPT) is an emerging therapeutic approach that is broadly based on the principles of positive psychology (PP). PP studies the conditions and processes that enable individuals, communities, and institutions to flourish. PPT is the clinical or therapeutic arm of PP. PPT integrates symptoms with strengths, risks with resources and deficits with assets. Without dismissing the severity psychiatric distress, or naively minimizing clients’ genuine concerns, PPT identifies and teaches clients evidence-based skills which use their best resources to meet their toughest challenges. Specifically, PPT helps clients to translate their cognitive, emotional, social and cultural strengths into goal-oriented, purposeful and pragmatic actions and habits, which aim to reduce their psychiatric distress as well as enhance their well-being. A strengths-based approach such as PPT can improve the effectiveness of psychotherapy by expanding the scope of psychotherapy, broadening beyond the medical model, expanding the outcome of psychotherapy, and attenuating the impact on the clinician.
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Satolo, Eduardo Guilherme, Milena Estanislau Diniz Mansur dos Reis, and Robisom Damasceno Calado. "Pull Production Systems." In Advances in Intelligent, Flexible, and Lean Management and Engineering, 80–112. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-5768-6.ch004.
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This chapter aims to organize knowledge about pull production systems by presenting the underlying concepts of lean manufacturing as for its origin, principles, and relations with PPC. Pull production is one the fundamental principles of lean manufacturing, and its implementation can bring positive impacts. For such a purpose, sequential and mixed supermarket pull systems stand out in which the integration between pull production systems and PPC and its various levels is a main subject of discussion. The JIT model or Kanban method and hybrid systems, such as conwip and lung-drum-string theory, are mechanisms for managing pull production systems. Finally, a pull production system implementation is presented for illustration purposes. At the end of this chapter, it is expected that skills are developed by readers, which are going to assist them in using the tools presented to model production systems and aid decision-making processes.
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"Hydro-Acoustic Analysis of the Cavitating Model Propeller PPTC in Oblique Flow." In Proceedings of the 10th International Symposium on Cavitation (CAV2018), 512–17. ASME Press, 2018. http://dx.doi.org/10.1115/1.861851_ch97.
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Lima, Rui M. "Integrating Production Planning and Control Business Processes." In Information Resources Management, 391–412. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-61520-965-1.ch214.
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Organizations have production planning and control (PPC) processes supported by systems that execute, mainly, repetitive calculations. Based on these calculation results, decisions are taken by production managers. These decision processes make the connection between different levels of aggregation of information and could benefit from the increment of the level of automation. An increased level of application of business process modelling languages is proposed in order to contribute to increment the level of process automation and the detail of business analysis. Thus being, concepts of integration of production management processes, specifically of production planning and control processes are presented. These concepts, the application of business process modelling language (BPML) and some solutions of PPC integration compose the core content of this work. Additionally, criteria for evaluation of these processes of integration are identified and discussed. Finally, the presentation of an industrial case will be supported by BPML model.
Conference papers on the topic "PPCT model"
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Antropov, N., I. Krivonosov, G. Popov, and A. Rudikov. "PPT model experimental refinement." In 32nd Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-2728.
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Barai, Atanu, Gopinath Chennupati, Nandakishore Santhi, Abdel-Hameed Badawy, Yehia Arafa, and Stephan Eidenbenz. "PPT-SASMM: Scalable Analytical Shared Memory Model." In MEMSYS 2020: The International Symposium on Memory Systems. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3422575.3422806.
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Kulkarni, Rakesh S., Janet K. Allen, and Farrokh Mistree. "Designing Product Families for a Changing Market Space." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85164.
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The Product Platform Constructal Theory Method (PPCTM) provides designers with an approach for synthesizing multiple modes of managing customization in the development of product platforms. An assumption underlying PPCTM is that the extent of the market space is known and is fixed. In this paper, we introduce PPCTM-RCM (Robust to Changes in Market) that facilitates designing product platforms when the extent of the market space is expected to change. The PPCTM-RCM is illustrated via example problem, namely, the design of a product platform for a line of customizable pressure vessels. Our focus in this paper is on highlighting features of the method rather than results per se.
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Ludeking, Lars D., and Andrew J. Woods. "Simulation boundary boundry model for multi-mode, multi-frequency signals using the Higdon operator." In 2015 IEEE Pulsed Power Conference (PPC). IEEE, 2015. http://dx.doi.org/10.1109/ppc.2015.7296973.
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Farooqui, Nazia M., and Kenneth S. Sorbie. "Oilfield Scale Inhibitors for Application in Precipitation Squeeze Treatments: Solubility of the Ca_PPCA Complex." In SPE International Oilfield Scale Conference and Exhibition. SPE, 2014. http://dx.doi.org/10.2118/spe-169792-ms.
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Abstract Chemical scale inhibitors (SI) are widely applied in the oil industry to prevent downhole scale formation in squeeze treatments. Poly-Phosphino Carboxylic Acid (PPCA) is an industry standard polymeric scale inhibitors which is often applied as a precipitation treatment, where PPCA forms a sparingly complex with calcium ions, denoted Ca_PPCA. In this paper, we study the detailed solubility behaviour of the Ca_PPCA complex which plays an important role in precipitation squeeze treatments. We describe several novel findings on the solubility of (Ca_PPCA) complex system. Specifically, 1.The precipitated Ca_PPCA complex was isolated and used to determine experimentally the solubility of the species involved in a field squeeze for various compositions and temperatures. 2.Different fractions of PPCA have been analysed by both ICP (for P) and Hyamine (for polymeric content) and for their inhibition efficiency (IE) against barite scale. We show that PPCA “precipitate” is richer in the higher molecular weight polymer components. 3.The solubility of the precipitated PPCA/Ca complex becomes lower as it is exposed to successive fresh supernatant brine and the behaviour is very unlike that expected from a “solubility product” model. We believe that these results are the most detailed to be published in the literature on the PPCA system and that they are of particular significance and application for all polymeric SI precipitation squeeze treatments. The significance of these results for field precipitation squeeze treatments is also discussed.
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Mokhberi, Ali, Vishnu Kamat, Apo Sezginer, Franz X. Zach, Gökhan Perçin, Jesus Carrero, and Hsu-Ting Huang. "PPC model build methodology: sequential litho and etch verification." In 26th Annual BACUS Symposium on Photomask Technology, edited by Patrick M. Martin and Robert J. Naber. SPIE, 2006. http://dx.doi.org/10.1117/12.692931.
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Dev, Shouvik, Prasad Divekar, Kelvin Xie, Xiaoye Han, Xiang Chen, and Ming Zheng. "A Study of Combustion Inefficiency in Diesel LTC and Gasoline-Diesel RCCI via Detailed Emission Measurement." In ASME 2014 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icef2014-5656.
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Reduction of engine-out NOx emissions to ultra-low levels is facilitated by enabling low temperature combustion (LTC) strategies. However, there is a significant energy penalty in terms of combustion efficiency as evidenced by the accompanying high levels of hydrocarbon (HC), carbon monoxide (CO), and hydrogen emissions. In this work, the net fuel energy lost as a result of incomplete combustion in two different LTC regimes is studied. The first LTC strategy, partially premixed compression ignition (PPCI), is investigated using a single, high pressure, in-cylinder injection of diesel fuel along with the application of exhaust gas recirculation (EGR). The second strategy includes dual-fuel application – reactivity controlled compression ignition (RCCI) of port injected gasoline and direct injected diesel. Moderate to high levels of EGR are necessary during engine operation in either of the two LTC pathways. A detailed analysis of the incomplete combustion products was conducted while the engine was operated in the aforementioned LTC modes. Speciation analysis of hydrocarbons was performed by sampling the exhaust gas in an FTIR. The total HC and the CO emissions were simultaneously measured using an FID and an NDIR, respectively. The production of hydrogen during the combustion process was also evaluated using a mass spectrometer. Engine tests were conducted at a baseline load level of 10 bar IMEP in the PPCI and RCCI modes. Load extension tests, up to 17 bar IMEP, were then conducted in the RCCI mode by increasing the gasoline-to-diesel fuel ratio. Test results indicated that CO, H2, and light HC made up for most of the combustion in-efficiency in the PPCI mode while heavier HC and aromatics were significantly higher in the RCCI mode.
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Mou, Nengye, Jin Zhang, and Meiling He. "Region Logistics Evaluation Research Using PPC Model Based On BAGA." In Eighth International Conference of Chinese Logistics and Transportation Professionals (ICCLTP). Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/40996(330)543.
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Sonthi, Ratnakar, and Rajit Gadh. "MMCs and PPCs As Constructs of Curvature Regions for Form Feature Determination." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/cie-4424.
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Abstract Shape feature information about a part is required to analyze the part for downstream issues such as manufacturability and assemblability. One method of obtaining the feature information is feature recognition from the geometric model. This paper presents an approach called Curvature Region (CR) approach for feature determination in solid models. The CR-approach categorizes features into two primitive shape classes: protrusions and depressions. In the first step, these primitive shape classes are recognized from the solid model. In the next step, the primitive shape classes are analyzed using rules to obtain features. Primitive features are found by first converting the boundary representation (B-Rep) of the CAD model to a higher level of representation called Curvature Region Representation (CR-Rep). Curvature Regions are then grouped together to form Minus-Minus Centers (MMCs) and Plus-Plus Centers (PPCs). Primitive shapes are then defined in terms of these centers.
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Cowart, Jim, Len Hamilton, and Dianne Luning Prak. "A Comparative Study of Alternative and Conventional Diesel Combustion Modes in a Single Cylinder Engine With a Single Injection Event." In ASME 2016 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icef2016-9372.
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A broadly ranging single injection event was used in a Waukesha diesel CFR engine in order to explore various conventional and alternative combustion modes at light load (2 bar GMEP) using n-heptane fuel. Start of injection (SOI) was varied from the start of the intake valve open (IVO) event all the way past TDC at the end of the compression stroke. Emissions, including detailed particulate, were collected at all of the operating points. Additionally, further experiments were performed with port fuel injection in order to create a homogeneous charge compression ignition (HCCI) combustion mode as well as partially premixed combustion (PPC) using both port and direct fuel injection. HCCI and PPC combustion modes were achieved with the characteristic rise in carbon monoxide (CO) and unburned hydrocarbon (UHC) emissions with however, a corresponding decrease in NOx emissions as compared to conventional direct (into cylinder) injection combustion modes. For conventional diesel operation with progressive advancement of SOI it was seen that start of combustion (SOC) advanced and then retarded slightly before stabilizing. This was associated with a general lengthening of ignition delay (IGD) with progressive SOI advancement. Even with very early intake valve open (IVO) injection events, the emissions behavior did not approach HCCI or PPC, suggesting that the charge mixture homogeneity of companion port injection could not be achieved in this engine using direct injection alone. High speed optical natural light filming of the combustion events through a large quartz window showed conventional diesel combustion with strong diffusion flames, reducing in intensity with PPC operation, and then no visible combustion with HCCI.
Reports on the topic "PPCT model"
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McAlpin, Jennifer, and Cassandra Ross. Houston Ship Channel Expansion Channel Improvement Project (ECIP) numerical modeling report : BABUS cell and Bird Island analysis. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41581.
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The Houston Ship Channel (HSC) is one of the busiest deep-draft navigation channels in the United States and must be able to accommodate increasing vessel sizes. The US Army Engineer District, Galveston (SWG), requested the Engineer Research and Development Center, Coastal and Hydraulics Laboratory, perform hydrodynamic and sediment modeling of proposed modifications in Galveston and Trinity Bays and along the HSC. The modeling results are necessary to provide data for hydrodynamic, salinity, and sediment transport analysis. SWG provided three project alternatives that include closing Rollover Pass, Bay Aquatic Beneficial Use System cells, Bird Islands, and HSC modifications. These alternatives and a Base (existing condition) will be simulated for present (2029) and future (2079) conditions. The results of these alternatives/conditions as compared to the Base are presented in this report. The model shows that the mean salinity varies by 2–3 ppt due to the HSC channel modifications and by approximately 5 ppt in the area of East Bay due to the closure of Rollover Pass. The tidal prism increases by 2.5% to 5% in the alternatives. The tidal amplitudes change by less than 0.01 m. The residual velocity vectors vary in and around areas where project modifications are made.