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Articoli di riviste sul tema "Programe pe calculator"
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Keating, Xiaofen Deng, Prithwi Raj Subramaniam, Rulan Shangguan e Li Chen. "Physical Education Program Changes from 2006 to 2010". Journal of Teaching in Physical Education 32, n. 2 (aprile 2013): 205–13. http://dx.doi.org/10.1123/jtpe.32.2.205.
Testo completoAbstract (sommario):
This study aimed to examine changes in physical education (PE) programs nation-wide from 2006 to 2010 by analyzing the data reported in the Shape of the Nation published by the National Association for Sport and Physical Education. Means and standard deviations for numeric variables in the reports were computed. For categorical variables, percentages were calculated. Data were analyzed using the Wilcoxon test. The data from this study indicate a significant change in elementary PE as more states have mandated elementary PE and licensed elementary PE teachers. Significant increases in required PE units for high school graduation were also noted, indicating a positive change toward enhancing high school PE. However, the percentages of states with funding for professional development and required PE coordinator decreased significantly, suggesting that more work needs to be done if school PE is to provide the help and support requested by public health agencies.
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Darnell, Julia, Mimi Lou e Lisa Goldstone. "Change in pharmacy resident familiarity, attitudes, comfort, and knowledge regarding digital health". Pharmacy Education 23, n. 1 (4 agosto 2023): 362–67. http://dx.doi.org/10.46542/pe.2023.231.362367.
Testo completoAbstract (sommario):
Background: Digital health is a growing area of interest in healthcare however. There is limited evidence to support this topic is being covered in pharmacy education, including postgraduate residency training programmes. This study aimed to determine if exposure to digital health topics throughout a teaching certificate programme leads to a significant change in resident familiarity, attitudes, comfort, and knowledge regarding digital health. Methods: The resident cohort was exposed to digital health content during a teaching certificate. Residents completed a questionnaire regarding their familiarity, attitudes, comfort, and knowledge regarding digital health at the beginning and end of the teaching certificate. Responses to each section of the questionnaire, as well as an overall score, were calculated and analysed. Results: Eighteen residents completed both the pre-and post-questionnaire. The median scores for familiarity and comfort increased significantly (p < 0.0001) after the yearlong intervention. Median scores for attitudes and knowledge did not see a significant change after intervention. Conclusion: After exposure to digital health in a teaching certificate programme, pharmacy residents demonstrated a significant increase in familiarity and comfort with digital health, however there was not a significant change in attitudes or knowledge.
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Vigoderis, Ricardo Brauer, Glaudemir Santos Leite, Tamara de Lima Oliveira, João Manoel Da Silva, Eusileide Suianne Rodrigues Lopes De Melo, Aristóteles Junio de Santana Santos, Josimar Vieira Dos Reis e Gerla Castello Branco Chinelate. "Impacto da implantação de um empreendimento imobiliário em Garanhuns-PE". CONTRIBUCIONES A LAS CIENCIAS SOCIALES 16, n. 7 (3 luglio 2023): 5402–18. http://dx.doi.org/10.55905/revconv.16n.7-013.
Testo completoAbstract (sommario):
Objetivou-se por esse estudo analisar alguns impactos da implantação um empreendimento imobiliário voltado para os contemplados no Programa Minha Casa Minha Vida e com isso fazer uma reflexão para projetos futuros. O trabalho foi desenvolvido no município de Garanhuns, que está situado na região Nordeste do Brasil, no Agreste Meridional de Pernambuco, entre as latitudes 08º 53’ 25’’S e longitude 36º 29’ 34’’O, englobando uma área total de 458.552 km². Objetivando verificar a evolução do Residencial Antônio Cordeiro e dos seus impactos na cobertura vegetal foi realizada uma análise multitemporal do NDVI da área de estudo. Para tal foram coletados dados da banda espectral do vermelho e infravermelho próximo dos satélites Landsat 5 (28/10/2009) e Landsat 8 (30/11/2015, 08/12/2018 e 10/10/2020) a partir do portal Earth Explorer mantido pela instituição científica Serviço Geológico dos Estados Unidos. Utilizando a ferramenta raster calculator do software ArcGIS os dados foram aplicados na referida e equação para obtenção do NDVI da área de estudo. Nas condições em que o trabalho foi desenvolvido, foi possível concluir que são indiscutíveis os impactos que o empreendimento causou na área, incluindo a substituição da cobertura e a impermeabilização de uma extensa área, alterando o regime de escoamento. Desta forma, é necessária uma reflexão com relação à empreendimentos futuros, para que estejam mais comprometidos com a sustentabilidade.
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Mclaughlin, Matthew, Jed Duff, Tom McKenzie, Elizabeth Campbell, Rachel Sutherland, John Wiggers e Luke Wolfenden. "Evaluating Digital Program Support for the Physical Activity 4 Everyone (PA4E1) School Program: Mixed Methods Study". JMIR Pediatrics and Parenting 4, n. 3 (26 luglio 2021): e26690. http://dx.doi.org/10.2196/26690.
Testo completoAbstract (sommario):
Background Effectively scaled-up physical activity interventions are urgently needed to address the high prevalence of physical inactivity. To facilitate scale-up of an efficacious school-based physical activity program (Physical Activity 4 Everyone [PA4E1]), provision of implementation support to physical education (PE) teachers was adapted from face-to-face and paper-based delivery modes to partial delivery via a website. A lack of engagement (usage and subjective experience) with digital delivery modes, including websites, may in part explain the typical reduction in effectiveness of scaled-up interventions that use digital delivery modes. A process evaluation focused on the PA4E1 website was undertaken. Objective The 2 objectives were to (1) describe the usage of the PA4E1 program website by in-school champions (PE teachers leading the program within their schools) and PE teachers using quantitative methods; (2) examine the usage, subjective experience, and usability of the PA4E1 program website from the perspective of in-school champions using mixed methods. Methods The first objective used website usage data collected across all users (n=273) throughout the 9 school terms of the PA4E1 implementation support. The 4 usage measures were sessions, page views, average session duration, and downloads. Descriptive statistics were calculated and explored across the duration of the 26-month program. The second objective used mixed methods, triangulating data from the first objective with data from a think-aloud survey and usability test completed by in-school champions (n=13) at 12 months. Qualitative data were analyzed thematically alongside descriptive statistics from the quantitative data in a triangulation matrix, generating cross-cutting themes using the “following a thread” approach. Results For the first objective, in-school champions averaged 48.0 sessions per user, PE teachers 5.8 sessions. PE teacher sessions were of longer duration (10.5 vs 7.6 minutes) and included more page views (5.4 vs 3.4). The results from the mixed methods analysis for the second objective found 9 themes and 2 meta-themes. The first meta-theme indicated that the website was an acceptable and appropriate delivery mode, and usability of the website was high. The second meta-theme found that the website content was acceptable and appropriate, and identified specific suggestions for improvement. Conclusions Digital health interventions targeting physical activity often experience issues of lack of user engagement. By contrast, the findings from both the quantitative and mixed methods analyses indicate high usage and overall acceptability and appropriateness of the PA4E1 website to school teachers. The findings support the value of the website within a multidelivery mode implementation intervention to support schools to implement physical activity promoting practices. The analysis identified suggested intervention refinements, which may be adopted for future iterations and further scale-up of the PA4E1 program. Trial Registration Australian New Zealand Clinical Trials Registry ACTRN12617000681358; https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=372870
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Ponsoda, Xavier, Cristina Núñez, José Vicente Castell e Maria José Gómez-Lechón. "Evaluation of the Cytotoxic Effects of MEIC Chemicals 31–50 on Primary Culture of Rat Hepatocytes and Hepatic and Non-hepatic Cell Lines". Alternatives to Laboratory Animals 25, n. 4 (luglio 1997): 423–36. http://dx.doi.org/10.1177/026119299702500405.
Testo completoAbstract (sommario):
The cytotoxicities of 20 chemicals (numbers 31–50) from the Multicenter Evaluation of In Vitro Cytotoxicity (MEIC) programme were assessed with a primary culture of rat hepatocytes and with two hepatic cell lines (Hep G2 and FaO) and one non-hepatic cell line (3T3). The cytotoxicities of the chemicals were evaluated by using the MTT test after the cells had been exposed to the chemicals for 24 hours. For a better evaluation of results, dose–response curves were mathematically linearised and cytotoxicity was expressed as IC50 values and IC10 values (the concentration causing 50% and 10% loss of cell viability, respectively). We found that all the compounds showed similar acute basal cytotoxicity in all four cellular systems (regardless of whether the cells were, or were not, metabolically competent or were or were not of human origin). When these results were used to predicit human toxicity in terms of a mathematical parameter (prediction error [PE]), we found that all four systems gave similar predictions of human toxicity. The best cytotoxicity parameter included in the PE calculation was the IC50/10, because of an underestimation of human toxicity by in vitro systems. However, when PEs were calculated for rodent toxicity, better results were obtained. Data from the literature obtained by using other experimental models for predicting human toxicity were analysed according to the same criteria. We conclude that cellular systems are better predictive tools for human toxicity than are prokaryotic cells or whole-organism models.
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López-Gil, José Francisco, Iván Cavero-Redondo, Pedro Juan Tárraga-López, Edina Maria de Camargo, Irene Sequí-Domínguez, Juan Luis Yuste Lucas, Fernando Renato Cavichiolli e Antonio García-Hermoso. "Intensity of Physical Activity in Physical Education Classes and School Recesses and Its Associations with Body Mass Index and Global Fitness Score in Spanish Schoolchildren". Applied Sciences 11, n. 23 (30 novembre 2021): 11337. http://dx.doi.org/10.3390/app112311337.
Testo completoAbstract (sommario):
Background: Examining the association between excess weight or physical fitness and intensity of physical activity (PA) during Physical Education (PE) classes or school recesses and in children could be of great interest and importance, especially for future intervention programs or public policies related to PA. The aim of this study was to explore the association between intensity of PA in PE classes or school recesses and excess weight or global physical fitness in a sample of Spanish schoolchildren. Methods: We performed a cross-sectional study in the Valle de Ricote (Region of Murcia, Spain). A final sample of 350 Spanish schoolchildren between 6 and 13 years of age was included from six different schools. Intensity of PA during PE classes and recesses was assessed by the Physical Activity Questionnaire for Older Children (PAQ-C). To assess physical fitness, the extended ALPHA fitness test battery was used. Body mass index (z-score) was calculated following the age- and sex-specific thresholds of the World Health Organization. Results: Both body mass index (z-score) and Global Fitness Score (z-score) were lower in schoolchildren engaging in high intensity of PA in both PE lessons and school (p < 0.05 for all). Lower odds of having excess weight were found in those who reported high intensity of PA in both PE classes and school recesses (OR = 0.54; CI 95%, 0.30–0.96). In these same participants, higher odds of being in the high Global Fitness Score tertile were found (OR = 1.96; CI 95%, 1.01–3.85). Conclusions: Our study showed that higher intensity of PA in PE classes and school recesses was associated with lower excess weight and higher global physical fitness.
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Mease, Philip, Christina Charles-Schoeman, Stanley Cohen, Lara Fallon, John Woolcott, Huifeng Yun, Joel Kremer et al. "Incidence of venous and arterial thromboembolic events reported in the tofacitinib rheumatoid arthritis, psoriasis and psoriatic arthritis development programmes and from real-world data". Annals of the Rheumatic Diseases 79, n. 11 (5 agosto 2020): 1400–1413. http://dx.doi.org/10.1136/annrheumdis-2019-216761.
Testo completoAbstract (sommario):
ObjectivesTofacitinib is a Janus kinase inhibitor for the treatment of rheumatoid arthritis (RA), psoriatic arthritis (PsA) and ulcerative colitis, and has been investigated in psoriasis (PsO). Routine pharmacovigilance of an ongoing, open-label, blinded-endpoint, tofacitinib RA trial (Study A3921133; NCT02092467) in patients aged ≥50 years and with ≥1 cardiovascular risk factor identified a higher frequency of pulmonary embolism (PE) and all-cause mortality for patients receiving tofacitinib 10 mg twice daily versus those receiving tumour necrosis factor inhibitors and resulted in identification of a safety signal for tofacitinib. Here, we report the incidence of deep vein thrombosis (DVT), PE, venous thromboembolism (VTE; DVT or PE) and arterial thromboembolism (ATE) from the tofacitinib RA (excluding Study A3921133), PsA and PsO development programmes and observational studies. Data from an ad hoc safety analysis of Study A3921133 are reported separately within.MethodsThis post-hoc analysis used data from separate tofacitinib RA, PsO and PsA programmes. Incidence rates (IRs; patients with events per 100 patient-years’ exposure) were calculated for DVT, PE, VTE and ATE, including for populations stratified by defined baseline cardiovascular or VTE risk factors. Observational data from the US Corrona registries (including cardiovascular risk factor stratification), IBM MarketScan research database and the US FDA Adverse Event Reporting System (FAERS) database were analysed.Results12 410 tofacitinib-treated patients from the development programmes (RA: n=7964; PsO: n=3663; PsA: n=783) were included. IRs (95% CI) of thromboembolic events among the all tofacitinib cohorts’ average tofacitinib 5 mg and 10 mg twice daily treated patients for RA, respectively, were: DVT (0.17 (0.09–0.27) and 0.15 (0.09–0.22)); PE (0.12 (0.06–0.22) and 0.13 (0.08–0.21)); ATE (0.32 (0.22–0.46) and 0.38 (0.28–0.49)). Among PsO patients, IRs were: DVT (0.06 (0.00–0.36) and 0.06 (0.02–0.15)); PE (0.13 (0.02–0.47) and 0.09 (0.04–0.19)); ATE (0.52 (0.22–1.02) and 0.22 (0.13–0.35)). Among PsA patients, IRs were: DVT (0.00 (0.00–0.28) and 0.13 (0.00–0.70)); PE (0.08 (0.00–0.43) and 0.00 (0.00–0.46)); ATE (0.31 (0.08–0.79) and 0.38 (0.08–1.11)). IRs were similar between tofacitinib doses and generally higher in patients with baseline cardiovascular or VTE risk factors. IRs from the overall Corrona populations and in Corrona RA patients (including tofacitinib-naïve/biologic disease-modifying antirheumatic drug-treated and tofacitinib-treated) with baseline cardiovascular risk factors were similar to IRs observed among the corresponding patients in the tofacitinib development programme. No signals of disproportionate reporting of DVT, PE or ATE with tofacitinib were identified in the FAERS database.ConclusionsDVT, PE and ATE IRs in the tofacitinib RA, PsO and PsA programmes were similar across tofacitinib doses, and generally consistent with observational data and published IRs of other treatments. As expected, IRs of thromboembolic events were elevated in patients with versus without baseline cardiovascular or VTE risk factors, and were broadly consistent with those observed in the Study A3921133 ad hoc safety analysis data, although the IR (95% CI) for PE was greater in patients treated with tofacitinib 10 mg twice daily in Study A3921133 (0.54 (0.32–0.87)), versus patients with baseline cardiovascular risk factors treated with tofacitinib 10 mg twice daily in the RA programme (0.24 (0.13–0.41)).
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Jiang, Man, Hongli Yu, Juan He, Guoping Qian e Marcin Bialas. "Professional Development Workshop for Physical Education Teachers in Southwest China: Benefiting Tai Chi Students with Pedagogical Content Knowledge". Sustainability 15, n. 13 (4 luglio 2023): 10541. http://dx.doi.org/10.3390/su151310541.
Testo completoAbstract (sommario):
Researchers have examined the common and specialized content knowledge (CCK/SCK) of physical education (PE) teachers and compared their pedagogical content knowledge (PCK) with student learning outcomes globally. However, little research has been reported in China on the relationship between PCK and student learning in PE settings. The aims of the study were (i) to investigate the influence of teacher content knowledge (CCK/SCK) on student development stages in PE settings and (ii) to examine the impact of teachers’ PCK on students’ performance in Tai Chi techniques (TCTs) after six days of instruction. Two PE teachers were chosen from two urban, public, mid-sized middle schools located in Chengdu, Sichuan Province, China. This study involved 332 students from six 5th and six 6th grade classes. The study consisted of 185 5th-grade students (98 boys and 87 girls) and 147 6th-grade students (70 boys and 77 girls). We examined how teacher PCK and student TCT changed after a professional development workshop (PDW). Each PE teacher had two classes randomly assigned to the control or experimental condition groups. This study had three phases. Initially, the control condition was introduced; then, a PDW was provided for the teachers; and finally, the experimental condition was implemented. Teaching behaviors were described using mean values, and t-tests based on the highest TCT scores were conducted to examine the effect of teachers’ PCK on students’ TCT learning. Furthermore, PCK effect sizes were calculated using Cohen’s d. Significant relationships existed between teachers’ PCK, CK, and students’ knowledge, with effect sizes ranging from 1.92 to 6.82. Additionally, improvements in teachers’ PCK were associated with improved TCT performance in students (p < 0.05). Increased knowledge and skills can improve teachers’ PCK behavior, resulting in improved student performance in TCTs. These findings may provide evidence for future recommendations regarding knowledge and skill training programs for physical education teachers.
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Kamphorst, Samuel Henrique, Gabriel Moreno Bernardo Gonçalves, Antônio Teixeira do Amaral Júnior, Valter Jário de Lima, Kátia Fabiane Medeiros Schmitt, Jhean Torres Leite, Valdinei Cruz Azeredo et al. "Supporting Physiological Trait for Indirect Selection for Grain Yield in Drought-Stressed Popcorn". Plants 10, n. 8 (23 luglio 2021): 1510. http://dx.doi.org/10.3390/plants10081510.
Testo completoAbstract (sommario):
The identification of traits associated with drought tolerance in popcorn is a contribution to support selection of superior plants under soil water deficit. The objective of this study was to choose morphological traits and the leaf greenness index, measured on different dates, to estimate grain yield (GY) and popping expansion (PE), evaluated in a set of 20 popcorn lines with different genealogies, estimated by multiple regression models. The variables were divided into three groups: morpho-agronomic traits—100-grain weight (GW), prolificacy (PR), tassel length (TL), number of tassel branches, anthesis-silking interval, leaf angle (FA) and leaf rolling (FB); variables related to the intensity of leaf greenness during the grain-filling period, at the leaf level, measured by a portable chlorophyll meter (SPAD) and at the canopy level, calculated as the normalized difference vegetation index (NDVI). The inbred lines were cultivated under two water conditions: well-watered (WW), maintained at field capacity, and water stress (WS), for which irrigation was stopped before male flowering. The traits GY (55%) and PE (28%) were most affected by water restriction. Among the morpho-agronomic traits, GW and PR were markedly reduced (>10%). Under dry conditions, the FA in relation to the plant stalk tended to be wider, the FB curvature greater and leaf senescence accelerated (>15% at 22 days after male flowering). The use of multiple regression for the selection of predictive traits proved to be a useful tool for the identification of groups of adequate traits to efficiently predict the economically most important features of popcorn (GY and PE). The SPAD index measured 17 days after male flowering proved useful to select indirectly for GY, while, among the morphological traits, TL stood out for the same purpose. Of all traits, PR was most strongly related with PE under WS, indicating its use in breeding programs. The exploitation of these traits by indirect selection is expected to induce increments in GY and PE.
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Sá, Carlos André de Souza, Magna Soelma Beserra De Moura, Josiclêda Domiciano Galvíncio, Rodrigo de Queiroga Miranda, Marcelo José Da Silva e Cloves Vilas Boas Dos Santos. "DETECÇÃO SEMIAUTOMÁTICA DE ÁRVORES EM POMAR DE MANGUEIRA IRRIGADA A PARTIR DE IMAGENS OBTIDAS POR DRONE". IRRIGA 26, n. 3 (18 novembre 2021): 507–24. http://dx.doi.org/10.15809/irriga.2021v26n3p507-524.
Testo completoAbstract (sommario):
DETECÇÃO SEMIAUTOMÁTICA DE ÁRVORES EM POMAR DE MANGUEIRA IRRIGADA A PARTIR DE IMAGENS OBTIDAS POR DRONE CARLOS ANDRÉ DE SOUZA SÁ1; MAGNA SOELMA BESERRA DE MOURA1,2; JOSICLÊDA DOMICIANO GALVÍNCIO3; RODRIGO DE QUEIROGA MIRANDA3; MARCELO JOSÉ DA SILVA4 E CLOVES VILAS BOAS DOS SANTOS3 1 Programa de Pós Graduação em Engenharia Agrícola, Universidade Federal do Vale do São Francisco, Av. Antônio Carlos Magalhães, 510, Santo Antônio, CEP 48.903-210, Juazeiro, BA, Brasil, carlosandreagronomia@outlook.com; magna.soelma@gmail.com. 2 Embrapa Semiárido, BR 428, Km 152, s/n, Zona Rural, Petrolina, PE, Brasil, magna.moura@embrapa.br. 3 Programa de Pós Graduação em Desenvolvimento e Meio Ambiente, Universidade Federal de Pernambuco, Av. Acadêmico Hélio Ramos, s/n, Cidade Universitária, 50.740-530, Recife, PE, Brasil, josicleda.galvincio@ufpe.br, rodrigo.qmiranda@gmail.com, clovesvilasboas@gmail.com. 4 Programa de Pós Graduação em Engenharia Agrícola, Universidade Federal Rural de Pernambuco, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, CEP 52.171-900, Recife, PE, Brasil, marcelosilvaagr@gmail.com. 1 RESUMO O monitoramento da população de plantas em áreas agrícolas é fundamental para acompanhar a produtividade, auxiliar no planejamento e na tomada de decisão. Assim, objetivou-se propor um protocolo para identificação remota de árvores de mangueiras no Submédio do Vale do São Francisco por meio de softwares e plugins gratuitos aplicados em imagens aéreas obtidas com drones. O estudo foi desenvolvido em três pomares de mangueira, empregando-se modelos digitais obtidos a partir de ortomosaicos gerados em três qualidades de processamento; avaliados no QGIS utilizando-se os plugins ‘Tree Density Calculator’ e ‘SAGA GIS’. Os resultados obtidos foram avaliados por meio dos índices de Precisão, Revocação e F1–Score. O índice de Precisão foi mais elevado para o processamento em qualidade baixa. O índice de Revocação apresentou maiores valores no processamento em qualidade média e elevada, indicando que quanto maior a qualidade do processamento, maior é a chance de acertar na contagem de árvores. Os maiores valores de F1–Score foram observados para o Tree Density Calculator com processamento na resolução baixa. Recomenda-se o uso de um protocolo para a identificação e contagem remota de árvores de mangueiras, de forma semiautomática por meio da utilização de imagens obtidas por VANTs e softwares de código livre e aberto. Palavras-chave: Identificação de árvores, mangicultura, sensoriamento remoto, veículo aéreo não tripulado. SÁ, C. A. S.; MOURA, M. S. B.; GALVÍNCIO, J. D.; MIRANDA, R. Q.; SILVA, M. J.; SANTOS, C. V. B. SEMIAUTOMATIC DETECTION OF TREES IN IRRIGATED MANGO ORCHARD FROM DRONE IMAGES 2 ABSTRACT The monitoring of plant populations in agricultural areas is essential to follow the productivity, assisting in planning and decision making. Thus, our objective was to propose a protocol for remote detection of mango trees in the Low-Middle of the Sao Francisco River Valley, by using free software and plugins applied on aerial drone images. The study was conducted in three mango orchards. We used digital models extracted from orthomosaics created under three level of quality; then they were evaluated on the package QGIS with the plugins ‘Tree Density Calculator’ and ‘SAGA GIS’. The results were evaluated with the indices Precision, Recall and F1–Score. The precision index was higher for low-quality processing; while the recall index showed higher values under medium and high quality, indicating that the higher the quality of the processing, the greater is the chance of acquiring an efficient tree counting. The highest F1–Score values were observed for the Tree Density Calculator plugin with low processing resolution. We recommend using this protocol for the remote identification and counting of mango trees, in a semiautomatic methodology by using aerial images obtained using drones and free software and plugins. Keywords: Identification of trees, mango cultivation, remote sensing, unmanned aerial vehicle.
Capitoli di libri sul tema "Programe pe calculator"
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Pfohl, Oliver, Stanimir Petkov e Gerd Brunner. "PE — a Scientific Computer Program for the Calculation of Fluid-Phase Equilibria". In Scientific Computing in Chemical Engineering II, 279–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60185-9_32.
Testo completo
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León-Pérez, Floribeth,, Diego, Briceño-Buenfil e Víctor, Monteón-Padilla. "Impact of tutorial activity on the desertion of dentistry students’ generations 2016-2020 at the Universidad Autónoma de Campeche". In Resilience from the practice of mentoring to contribute to the permanence of students, 90–100. ECORFAN, 2023. http://dx.doi.org/10.35429/h.2023.10.90.100.
Testo completoAbstract (sommario):
Tutorial attention is one of the most valuable tools to reduce school dropout, through tutoring, it is possible to investigate the causes that lead the student to make the decision to drop out and propose solutions to various problems to support the student. Since 2015, the UAC School of Dentistry implemented changes in the tutoring program, and in order to know its effect on dropout, a retrospective cohort study was carried out, in which generations of the PE of Dental Surgeon of the Autonomous University of Campeche (UACAM) during the period 2016-2020, the dropout rates per semester were determined, and it was related to the tutorial activity during the study period, risk measures were also calculated related to sex, age and place of origin. It was found that tutorial attention is a protection factor against dropout, students who are attended have a 72% lower risk of dropping out than those who are not. Factors such as being male or female, age, and origin was not a risk factor for desertion in this population. We conclude that the strategies of the tutorial action plan have positive effects to prevent the dropout of students from the UACAM Dental Surgeon program
Atti di convegni sul tema "Programe pe calculator"
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Kim, Sungchan, Cheolho Ryu, Youngho Kim, Changbong Han e Dong Geun Kim. "Three Dimensional Grillage Analysis of Reactions on Supports of a Pre-Erection Block". In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-11349.
Testo completoAbstract (sommario):
There are many PE(Pre-Erection) Blocks in open areas of the shipyard, which are supported by the wooden, concrete, or steel supports. Their position and numbers are decided on a basis of the workers’ experiences. Recently, many shipyards have been making PE blocks with various shape and weight distribution because of the variety of kinds of ships and their building technology. Seriously, they are treating blocks which have not been experienced. In order to evaluate the reliability of all support plans of PE Blocks in such situation, many man hours (MH) are consumed, and the special knowledge and technology about structural analysis are required. We proposed how to conveniently and quickly evaluate the structural safety on PE block supports and developed an application system to implement the evaluation process with three dimensional part models of the PE block and their weight information. The evaluation is based on the simplification to a grillage model of a PE block and its grillage analysis. The load distribution on the grillage model is calculated by two approaches. The first is that the load distribution on the grillage nodes are estimated with the real weight and the center of gravity of each part of a PE block, which can be provided from design databases of the shipyard. The other is that the load distribution is optimally estimated only with the weight and the center of gravity of sub blocks of a PE block. The latter is useful in the case that block information of mother ships can be obtained without the detail design of the PE block. The integrated system has been comprehensively implemented in order to make the grillage model from the three dimensional CAD models of the PE block and their weight information, and to perform the grillage analysis for the reaction forces on the block supports. In the application program, the grillage model can be automatically built from CAD models of PE block. Also the grillage can be modified by inserting, splitting, and deleting a beam element.
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Melnikov, Sergei Igorevich, Nikita Vladimirovich Vershigora, Alexander Alexandrovich Groo, Denis Sergeevich Grigorev, Pavel Yurievich Kiselev e Victor Victorovich Morozov. "An Improved Methodology for Gas-Condensate Cluster Evaluations under Uncertainty". In SPE Russian Petroleum Technology Conference. SPE, 2021. http://dx.doi.org/10.2118/206572-ms.
Testo completoAbstract (sommario):
Abstract A decision to buy oil and gas assets requires a project evaluation (PE) aimed at integrated calculation of numerous possible scenarios of asset development, based on the uncertain resource values, variety of geological exploration program events, the most preferable decisions about the oil field development in the current economic conditions. The vast amount of calculations determined by the probabilistic nature of the PE and specific timeframes require optimization of the current approaches based on the balance between accuracy and time. This issue is particularly relevant for the evaluation and analysis of gas or gas-condensate field cluster as the profitability of the project can be concentrated in the asset integration into one production cluster. Such option as well as proposal to gather separate fields to the common infrastructure, sequence of fields development with different geological and physical characteristics, calculations of a large number of synergy options, etc. require the multi-disciplinary team to think outside the box while searching for a business case. Thus, this paper is aimed to improve current approaches and the current tools adaptation which will be used to drastically automate cross-functional probability estimate of gas field cluster with technical and economic justification of sustainable integrated solutions. The results were successfully validated within PE of several perspective gas condensate projects focused on the possibility of integration of the fields into a single cluster that creates additional value from the optimization of the project solutions (exploration, development strategy, gathering and transportation of hydrocarbons, monetization of the products) equal to tens of billions of rubles in a limited period of time.
3
Adams, Timothy M., Douglas Munson, Siegrid Hall e Jeffrey W. Andrasik. "Bending Fatigue Testing of Pipe and Piping Components Fabricated From High Density Polyethylene Materials". In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78775.
Testo completoAbstract (sommario):
Degradation of service water systems is a major issue facing nuclear power plant owners, and many plants will require repair or replacement of existing carbon steel piping components. High Density Polyethylene piping has been used in non-safety service water systems for over nine years and found to perform well, and is now permitted in the ASME Section III Boiler and Pressure Vessel Code, Division 1 for use in nuclear safety-related systems. To assist in this implementation of High Density Polyethylene piping in the ASME Boiler and Pressure Vessel Code, Section III, Division 1 for Safety Class 3 applications, Electric Power Research Institute initiated a testing program that includes tensile and fatigue testing of High Density Polyethylene piping and components and the development of data to evaluate slow crack growth that can emanate from surface scratches. Straight cantilever bending fatigue tests on PE 4710 pipe with a minimum cell classification of 445474C were previously conducted and the results presented at the 2008 PVP Conference in Chicago, Illinois. The tests were designed to comply with the requirements for fatigue testing given in Mandatory Appendix II of the ASME Boiler and Pressure Vessel Code, Section III, Division 1. Based on the straight pipe tests, Stress Intensification Factors can be calculated for other piping components. This paper reports on follow-on testing of PE 4710 cell classification 445574C piping components. The fatigue testing results showed one of the unique characteristics of High Density Polyethylene piping: a significant decrease in material stiffness from the first few test cycles to a lower value that remains almost constant until failure. Thus, Stress at Failure vs cycles at failure curves and Stress Intensification Factors were determined twice: first based on the initial cycle results and again at the midlife of the fatigue tests. This paper provides a description and overview of the test program, testing methods and materials tested. In addition, an overview and summary of the test program results are provided.
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Gould, David M., e Charles A. Garris. "The Design and Rating of the Pressure Exchange Steam Ejector for a Waste Heat Driven Automotive Air Conditioning System". In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90218.
Testo completoAbstract (sommario):
A pressure exchange ejector invented by George Washington University’s Professor Charles Garris has been considered a novel concept for energy conversion and utilization of two working fluids. One of the applications of the pressure exchange ejector involves taking the captured waste heat from the car’s engine to assist in running its air conditioning system. This study involves implementing the pressure exchange ejector in a modified vapor compression air conditioning system and determining its feasibility with performance and sizing for a typical midsize sedan. The specific midsize sedan chosen in the analysis is the inline six-cylinder BMW 530i sedan. The analysis involves comparing previous results and data of high and low cooling loads from the conventional automotive air conditioning (A/C) system using R-134a refrigerant with a new steam pressure exchange ejector A/C system. The pressure exchange (PE) ejector similar to the conventional ejector can be represented by the turbomachinery analog. Desirable theoretically efficiencies of the PE ejector using the turbomachinery analog are varied to determine the minimal efficiency required to run the ejector air conditioning system. The performances of the ideal and minimum condition for the PE ejector A/C system are determined to view the potential and feasibility of the system. The system consists of environmentally friendly steam as a refrigerant and replaces the conventional A/C system’s engine driven compressor with an ejector and a second loop for waste heat recovery from the car’s engine exhaust system. Simulation tests of varying ejector efficiency under the designed A/C system and vehicle conditions are conducted through computational heat transfer and thermodynamic analysis using MATLAB/Simulink. The software is a numerical calculation and visualization software program where various environmental, thermodynamic, heat transfer, and sizing conditions can be monitored. Engine exhaust heat and conventional air conditioning results and properties are obtained through previous experiments and analysis at respected universities and laboratories.
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Adams, Timothy M., Rudolph J. Scavuzzo, Siegrid Hall, Douglas Munson, Jeffrey W. Andrasik e Shane Findlan. "Bending Fatigue of Pipe and Piping Components Fabricated From High Density Polyethylene Materials". In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61907.
Testo completoAbstract (sommario):
Degradation of service water systems is a major issue facing nuclear power plant owners, and many plants will require repair or replacement of existing carbon steel piping components. High Density Polyethylene pipe has been used in non-safety service water systems for over nine years and found to perform well, but it is not currently permitted in the ASME Section III Boiler and Pressure Vessel Code, Division 1 for use in nuclear safety-related systems. To assist in the implementation of High Density Polyethylene pipe in the ASME Boiler and Pressure Vessel Code, Section III, Division 1 for Safety Class 3 applications, EPRI initiated a testing program that includes tensile and fatigue testing of HDPE piping and components and the development of slow crack growth data. Straight cantilever bending fatigue tests on PE 4710 pipe with a minimum cell classification of 445474C were conducted. The tests were designed to comply with the requirements for fatigue testing given in Appendix II of the ASME Boiler and Pressure Vessel Code, Section III, Division 1. They were also designed to achieve failure at the fusion butt welds near the cantilever support. S-N curves developed from both sets of data were found to fit well to power formulas of the type S = C/Nb required by mandatory Appendix II. The tests were conducted at various temperatures from 50° F to 160° F and in addition the effects of cyclic rate and aging were evaluated. Based on the straight pipe tests, stress intensification factors were calculated for 5-segment miter bends in both the in-plane and out-of-plane directions. The test elbows were fabricated from PE 4710 material with cell classification 445474C. Two sizes of 5-segment miter bends were tested, 4” and 12” diameter. The fatigue testing results showed one of the unique characteristics of High Density Polyethylene pipe: a significant decrease in material stiffness from the first few test cycles to a lower value that remains almost constant until failure. Thus, S-N curves and SIFs were determined twice: first based on the initial cycle results and again at the midlife of the fatigue tests. This paper provides a description and overview of the test program, testing methods and materials tested. In addition, an overview and summary of the test program results are provided.