Bibliographies thématiques / PSRI

Littérature scientifique sur le sujet « PSRI »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "PSRI"

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Rudge, Cibele, Iracema Calderon, Ana Almeida, Fernanda Piculo, Marilza Rudge et Angélica Barbosa. « Score Establishment and Brazilian Portuguese version of the Pregnancy Sexual Response Inventory (PSRI) ». Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics 40, no 06 (juin 2018) : 322–31. http://dx.doi.org/10.1055/s-0038-1656536.

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Objective To establish the Pregnancy Sexual Response Inventory (PSRI) scores for each domain before and during pregnancy, and to publish the Brazilian Portuguese version of the PSRI. Methods Pregnant women were recruited during antenatal care; the PSRI was administered to 244 women prenatally at Faculdade de Medicina de Botucatu, at Universidade do Estado de São Paulo (UNESP, in the Portuguese acronym). The PSRI scores were estimated based on the Kings Health Questionnaire (KHQ) and the Medical Outcomes Study 36-item short form survey (SF-36). The raw scale type was used to standardize the minimal value and amplitude of each domain. For each domain, the score varied from 0 to 100, and the composite score was obtained as the domain average. The composite score before and during pregnancy was determined by the sum of the scores of all specific domains for each divided by the full domain number. The categorization of the scale into quartiles was established when all PSRI-specific and composite scores were combined. Results The composite and specific scores for each domain were categorized into quartiles: 0 < 25 as “very bad;” 25 < 50 as “bad;” 50 < 75 as “good” and 75 to 100 as “excellent.” The mean scores were lower during pregnancy than before pregnancy in 8 of the 10 domains. The Brazilian Portuguese PSRI version is presented. Conclusion This study allowed the establishment of the PSRI composite and specific scores for each domain, and the categorization of scores into quartiles: very bad, bad, good and excellent. In addition, the Brazilian Portuguese version of the PSRI is presented in full for application in the Brazilian population.
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Chinosi, C. « PSRI elements for the Reissner–Mindlin free plate ». Computers & ; Structures 83, no 31-32 (décembre 2005) : 2559–72. http://dx.doi.org/10.1016/j.compstruc.2005.07.005.

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Spirkovska, L., et M. B. Reid. « Coarse-coded higher-order neural networks for PSRI object recognition ». IEEE Transactions on Neural Networks 4, no 2 (mars 1993) : 276–83. http://dx.doi.org/10.1109/72.207615.

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Murakawa, Y., T. Yamashita, K. Ajiki, K. Sezaki, Y. Kanese et M. Omata. « Electrophysiological background of individual variability in electrical defibrillation efficacy ». American Journal of Physiology-Heart and Circulatory Physiology 271, no 3 (1 septembre 1996) : H1094—H1098. http://dx.doi.org/10.1152/ajpheart.1996.271.3.h1094.

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This study was performed to test whether heart-to-heart variability of defibrillation efficacy is attributable to differences in postshock refractory state of nondepolarized myocardium. In 30 anesthetized dogs, a localized potential gradient was created using 1-16 V of stimulus across a pair of platinum plate electrodes on the right ventricle (5-mm interelectrode distance). The postshock recovery interval (PSRI) of the relatively refractory myocardium directly adjacent to the excited area was estimated by measuring the recovery interval after an appropriately timed field stimulus. The transcardiac defibrillation threshold (DFT) was also determined. The results showed that DFT normalized by the weight of the heart was inversely correlated with the PSRI measured with a field stimulus of 6 V (local shock intensity approximately 5 V/cm) or more (6 V: r = -0.502, P < 0.005; 16 V: r = -0.635, P < 0.0005). This observation suggests that variability of defibrillation efficacy in intact hearts is largely due to differences in the postshock refractory state of the nondepolarized myocardium.
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Schönert, M., E. Zillmann, H. Weichelt, J. U. H. Eitel, T. S. Magney, H. Lilienthal, B. Siegmann et T. Jarmer. « The Tasseled Cap Transformation for RapidEye data and the estimation of vital and senescent crop parameters ». ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-7/W3 (28 avril 2015) : 101–8. http://dx.doi.org/10.5194/isprsarchives-xl-7-w3-101-2015.

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The retrieval of crop biophysical parameters using spectral indices obtained from high temporal and spatial resolution satellite data, is a valuable tool to monitor crop growth and status. Tasseled Cap Features (TCFs) for RapidEye data were derived from spectral variances typically present in agricultural scenes. The TCF Greenness (GRE) was aligned to the spectral variance of vital vegetation, and therefore, it represents the typical reflectance characteristics of green vegetation, with relatively higher reflectance at the nearinfrared (NIR) range. The TCF Yellowness (YEL) was aligned to correspond to the reflectance characteristics of senescent crops, with relatively higher reflectance in the visible portion of the spectrum due to chlorophyll breakdown, and lower reflectance in the NIR range due to cell structure decomposition compared to vital green vegetation. The goal of this work was to assess the potential of RapidEye’s TCFs for the prediction of green leaf area index (LAI), plant chlorophyll (Chl), and nitrogen (N) concentration, as well as the identification of senescence patterns. The linear relationships between the biophysical parameters and the TCFs were compared to the performance of the widely used indices NDVI and PSRI. Preliminary results indicate that GRE is strongly related to LAI in vital crops and suggests a higher predictive power than NDVI. YEL demonstrated a strong linear relation and a higher potential to estimate Chl and N concentration in senescent soft white winter wheat (<i>Triticum aestivum</i> L.) in comparison to PSRI. PSRI showed a stronger correlation to Chl in senescent soft white spring wheat (<i>Triticum aestivum</i> L.), compared to YEL. Results indicate that YEL may be used to characterize the variability in senescence status within fields. This information, in conjunction with soil fertility and yield maps, can potentially be used to designate precision management zones.
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Li, Tingwen, Jean-François Dietiker et Mehrdad Shahnam. « MFIX simulation of NETL/PSRI challenge problem of circulating fluidized bed ». Chemical Engineering Science 84 (décembre 2012) : 746–60. http://dx.doi.org/10.1016/j.ces.2012.09.024.

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Sobura, Szymon, Beata Hejmanowska, Małgorzata Widłak et Joanna Muszyńska. « The Application of Remote Sensing Techniques and Spectral Analyzes to Assess the Content of Heavy Metals in Soil – A Case Study of Barania Góra Reserve, Poland ». Geomatics and Environmental Engineering 16, no 4 (18 octobre 2022) : 187–213. http://dx.doi.org/10.7494/geom.2022.16.4.187.

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The understanding of the spatial and temporal dynamics of farmland processes is essential to ensure the proper crop monitoring and early decision making needed to support efficient resource management in agriculture. By creating appropriate crop management strategies, one can increase harvest efficiency while reducing costs, waste, chemical spraying, and inhibiting the impact of biotic and abiotic factors on crop stress. Only reliable spatial information makes it possible to comprehend the influence of various factors on the environment. The main objective of the research presented in the paper was to assess the possibility of using maps of vegetation and soil indices, such as NDVI, SAVI, IRECI, CIred-edge, PSRI and HMSSI, calculated on the basis of images from the Sentinel-2 satellite, to qualitatively determine the increased amount of heavy metals in the soil in the areas of small agricultural plots around the Barania Góra nature reserve in Poland.The conducted pilot project shows that the spectral indices: NDVI, SAVI, IRECI, CIred-edge, PSRI, and HMSSI, calculated on the basis of images from Sentinel-2, have the potential to assess the content of nickel zinc, chromium and cobalt in the soil on agricultural plots. However, the confirmation of the obtained results requires continuation of the research.
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Chalermsinsuwan, Benjapon, Pornpote Piumsomboon et Dimitri Gidaspow. « Kinetic theory based computation of PSRI riser : Part I—Estimate of mass transfer coefficient ». Chemical Engineering Science 64, no 6 (mars 2009) : 1195–211. http://dx.doi.org/10.1016/j.ces.2008.11.010.

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Yudarwati, Rani, Chiharu Hongo, Gunardi Sigit, Baba Barus et Budi Utoyo. « Bacterial Leaf Blight Detection in Rice Crops Using Ground-Based Spectroradiometer Data and Multi-temporal Satellites Images ». Journal of Agricultural Science 12, no 2 (15 janvier 2020) : 38. http://dx.doi.org/10.5539/jas.v12n2p38.

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This study presents a method for detecting rice crop damage due to bacterial leaf blight (BLB) infestation. Rice crop samples are first analyzed using a handheld spectroradiometer. Then, multi-temporal satellite image analysis is used to determine the most suitable vegetation indices for detecting BLB. The results showed that healthy plants have the highest first derivative value of spectral reflectance of the different categories of diseased plants. Significant difference can be found at approximately 690-770 nm (red edge region) which peak or maximum of the first derivative occurs in healthy crop whereas the highest percentage of BLB showed the lowest in that region. Moreover, visible bands such as blue, green, red, and red edge 1 band show variation of correlation in the early (vegetative) to generative stage then getting high especially in early of harvesting stage than the other bands; the NIR band exhibits a low correlation from the early stage of the growing season whereas the red and red edge bands reveal the highest correlations in the later stage of harvesting. Similarly, the satellite image analysis also reveals that disease incidence gradually increases with increasing age of the plant. The vegetation indices whose formulas consist of blue, green, red, and red edge bands (NGRDI, NPCI, and PSRI) exhibit the highest correlation with BLB infestation. NPCI and PSRI indices indicate that crop stress due to BLB is detected from ripening stage of NPCI then the senescence condition is then detected 12 days later. The coefficients of determination between these indices and BLB are 0.44, 0.63, and 0.67, respectively
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Guendler, Julianna Azevedo, Leila Katz, Maria Eduarda Duarte Mello Flamini, Andrea Lemos et Melania Maria Amorim. « Prevalence of Sexual Dysfunctions and their Associated Factors in Pregnant Women in an Outpatient Prenatal Care Clinic ». Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics 41, no 09 (septembre 2019) : 555–63. http://dx.doi.org/10.1055/s-0039-1695021.

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Objective To determine the prevalence of sexual dysfunction and its associated factors in pregnant women. Methods A descriptive, cross-sectional study including 262 pregnant women aged 18 years or older with gestational age between 10 and 35 weeks. Women with urinary tract infections and conditions of gestational risk were excluded. The Pregnancy Sexual Response Inventory (PSRI) questionnaire was used. We performed a univariate descriptive analysis, and comparisons between the mean values of the sexual function domains were made using the Student t-test. The chi-squared test was used to determine the association between the independent and dependent variables. The prevalence ratios, with their respective 95% confidence intervals, were also estimated, and a multivariate analysis was performed. Results A total of 64.9% of women reported a decrease in the frequency of sexual activity during pregnancy. Slightly more than half of the women (50.8%) were satisfied, and arousal was reported as excellent/good by 30.5% of them. The frequency of sexual difficulties/dysfunctions increased with pregnancy, rising from 5.7% to 58.8%, and pain during sexual intercourse was reported by 45.8% of them. Having higher education degree decreased the chance of being sexually dissatisfied by 50%. The total PSRI score showed a significant decrease from the prepregnancy period (mean score = 89.8, “excellent”) to the pregnancy period (mean score = 59.2, “good”). Conclusion The mean sexual function score during pregnancy was classified as good, although most pregnant women reported at least one type of alteration in the sexual function domains, and the report of dissatisfaction was more frequent in women with lower schooling.
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Thèses sur le sujet "PSRI"

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Rudge, Cibele Vieira Cunha [UNESP]. « Desenvolvimento do inventário da resposta sexual na gestação - PSRI ». Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/95369.

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Made available in DSpace on 2014-06-11T19:27:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-02-23Bitstream added on 2014-06-13T20:17:05Z : No. of bitstreams: 1 rudge_cvc_me_botfm.pdf: 986176 bytes, checksum: d2991d68cfcb4b1636f6b31ad2fffab1 (MD5)
Financiadora de Estudos e Projetos (FINEP)
Estimar a prevalência e a incidência de disfunção sexual feminina (DSF) é importante para entender seu impacto na qualidade de vida, identificando fatores de risco para adoção de medidas preventivas. OBJETIVO: Estudar a evolução histórica do conhecimento da função e da disfunção sexual, o estado atual da arte e os novos conceitos e classificações das DSF. MATERIAL E MÉTODOS: Os modelos lineares de Masters & Johnson e Kaplan (Desejo, Excitação, Orgasmo e Resolução) representaram avanço científico e facilitaram as pesquisas, porém o conceito focado no genital não tem sido útil na orientação das disfunções sexuais. O novo modelo descrito por Basson (2002) move o foco do início da RSF de desejo sexual espontâneo genital para um ciclo responsivo, onde a motivação sexual é baseada na intimidade, transformando o estímulo sexual em excitação e o prazer afetivo desta excitação. Esta experiência física satisfatório leva posteriormente ao desejo sexual. Se o resultado for emocional e fisicamente satisfatório aumentará a intimidade emocional do casal. A classificação diagnóstica das DSF varia entre os diferentes sistemas diagnósticos, CID-10 (OMS) e DSM-IV (Associação Americana de Psiquiatria) e Classificação de Paris (2nd International Consultation on Sexual Dysfunction), sendo a inclusão do critério de acentuado sofrimento pessoal o elemento essencial para o diagnóstico.CONCLUSÃO: Mais estudos sobre a fisiologia da RSF são necessários para identificar seus marcadores, entender melhor essa espiral ascendente e quando e porquê ela se modifica − estica, achata ou rompe.
Accurate estimates of prevalence/ incidence of female sexual dysfunction (FSD) are important in understanding the true burden on quality of life, and in identifying risk factors for prevention. PURPOSE: To study the historical evolution of female sexual response, the state-of-the-art knowledge in women’s sexual response, and the revised definitions and classifications of FSD. MATERIAL AND METHODS: The Master & Johnson and Kaplan models (desire, arousal, orgasm and resolution) was a great scientific advance, facilitated clinical research, however the concept one linear sequence genitally focused events has not proven helpful in managing women’s sexual dysfunctions. A new view of women’s sexual response published by Basson (2002) moves the focus from spontaneous sexual drive to an inherently responsive cycles, that reflects intimacy-based sexual motivation, processing of sexual stimuli to arousal. Sexual desire to continue the physical experience is emotionally and physically satisfying, emotional intimacy with the partner is increased. Diagnostic classifications have varies among different diagnostic systems: ICD-10 (WHO), and DSM-IV (American Psychiatric Association) and Paris classification (2nd International Consultation on Sexual Dysfunction). An essential element of the new diagnostic system is the inclusion of personal distress criterion for most of the diagnostic categories. CONCLUSION: Further research is urgently need on female sexual response physiology, to identify their markers and to better understanding the feedback loops.
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Rudge, Cibele Vieira Cunha. « Desenvolvimento do inventário da resposta sexual na gestação - PSRI / ». Botucatu : [s.n.], 2007. http://hdl.handle.net/11449/95369.

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Orientador: Iracema de Mattos Paranhos Calderon
Banca: Nilson Roberto de Mello
Banca: Eliana Aguiar Petri Nahas
Resumo: Estimar a prevalência e a incidência de disfunção sexual feminina (DSF) é importante para entender seu impacto na qualidade de vida, identificando fatores de risco para adoção de medidas preventivas. OBJETIVO: Estudar a evolução histórica do conhecimento da função e da disfunção sexual, o estado atual da arte e os novos conceitos e classificações das DSF. MATERIAL E MÉTODOS: Os modelos lineares de Masters & Johnson e Kaplan (Desejo, Excitação, Orgasmo e Resolução) representaram avanço científico e facilitaram as pesquisas, porém o conceito focado no genital não tem sido útil na orientação das disfunções sexuais. O novo modelo descrito por Basson (2002) move o foco do início da RSF de desejo sexual espontâneo genital para um ciclo responsivo, onde a motivação sexual é baseada na intimidade, transformando o estímulo sexual em excitação e o prazer afetivo desta excitação. Esta experiência física satisfatório leva posteriormente ao desejo sexual. Se o resultado for emocional e fisicamente satisfatório aumentará a intimidade emocional do casal. A classificação diagnóstica das DSF varia entre os diferentes sistemas diagnósticos, CID-10 (OMS) e DSM-IV (Associação Americana de Psiquiatria) e Classificação de Paris (2nd International Consultation on Sexual Dysfunction), sendo a inclusão do critério de acentuado sofrimento pessoal o elemento essencial para o diagnóstico.CONCLUSÃO: Mais estudos sobre a fisiologia da RSF são necessários para identificar seus marcadores, entender melhor essa espiral ascendente e quando e porquê ela se modifica − estica, achata ou rompe.
Abstract: Accurate estimates of prevalence/ incidence of female sexual dysfunction (FSD) are important in understanding the true burden on quality of life, and in identifying risk factors for prevention. PURPOSE: To study the historical evolution of female sexual response, the state-of-the-art knowledge in women's sexual response, and the revised definitions and classifications of FSD. MATERIAL AND METHODS: The Master & Johnson and Kaplan models (desire, arousal, orgasm and resolution) was a great scientific advance, facilitated clinical research, however the concept one linear sequence genitally focused events has not proven helpful in managing women's sexual dysfunctions. A new view of women's sexual response published by Basson (2002) moves the focus from spontaneous sexual drive to an inherently responsive cycles, that reflects intimacy-based sexual motivation, processing of sexual stimuli to arousal. Sexual desire to continue the physical experience is emotionally and physically satisfying, emotional intimacy with the partner is increased. Diagnostic classifications have varies among different diagnostic systems: ICD-10 (WHO), and DSM-IV (American Psychiatric Association) and Paris classification (2nd International Consultation on Sexual Dysfunction). An essential element of the new diagnostic system is the inclusion of personal distress criterion for most of the diagnostic categories. CONCLUSION: Further research is urgently need on female sexual response physiology, to identify their markers and to better understanding the feedback loops.
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Quiroz, Sofia Beatriz Carolina Vega. « Adaptação transcultural e validação do Pregnancy Sexual Response Inventory (PSRI) em espanhol para gestantes chilenas ». Botucatu, 2019. http://hdl.handle.net/11449/181566.

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Orientador: Marilza Vieira Cunha Rudge
Resumo: Adaptação transcultural e validação do Pregnancy Sexual Response Inventory (PSRI) para o espanhol em gestantes chilenas. Introdução: A gestação é marco especial na vida da mulher, ocorrem mudanças físicas e psicológicas que comumente impactam no bem-estar geral. Podem ser observadas modificações sexuais no período gestacional, fator que pode afetar negativamente a qualidade de vida. O Inventário de Resposta Sexual à Gravidez (PSRI) é ferramenta clínica com entrevista breve e semiestruturada para avaliar o impacto da gravidez na sexualidade, no entanto, atualmente não há tradução em espanhol do questionário PSRI. Objetivo: Traduzir, adaptar culturalmente e validar para língua espanhola (Chile) o PSRI em gestantes chilenas. Método: Estudo de corte transversal, internacional desenvolvido no Chile. Incialmente, o questionário PSRI foi validado na língua espanhola para gestantes chilenas. Posteriormente o PSRI validado foi aplicado com a finalidade de avaliar a qualidade sexual das gestantes em diferentes trimestres. Foi analisado “por domínio" e a pontuação "geral" que variam de 0 (pior) até 100 (o melhor) e a pontuação final em categorização dividida em quartis da seguinte forma: 0 <25 como "muito ruim", 25 <50 como "ruim", 50 <75 como "bom" e 75-100 como "excelente". Análise de dados: A distribuição dos escores do questionário PSRI foi avaliada pela média (desvio padrão [DP]); a confiabilidade foi avaliada pelo coeficiente alfa de Cronbach, que avaliou a consistência interna. A... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Cross-cultural adaptation and validation of the questionnaire Pregnancy Sexual Response Inventory (PSRI) to Spanish version for Chilean pregnant women. Introduction: Gestation is a particular moment in women's lives, there are physical and psychological changes that commonly affect the general well-being. Sexual changes can be observed in the gestational period, a factor that can negatively affect the quality of life. The Pregnancy Sexual Response Inventory (PSRI) is a clinical tool with brief and semi-structured interview to assess the impact of pregnancy on sexuality, however, there is currently no Spanish translation of the PSRI questionnaire. Objective: To translate, culturally adapt and validate the Spanish language (Chile) the PSRI in Chilean pregnant women. Method: Cross-sectional, international study developed in Chile. Initially, the PSRI questionnaire in the Spanish language for pregnant women in Chile was validated. Subsequently the validated PSRI was applied with the purpose of evaluating the sexual quality of the pregnant women in different quarters. It was analyzed by "domain" and the "general" score ranging from 0 (worst) to 100 (the best) and the final score in categorization divided into quartiles as follows: 0<25 as "very bad," 25 <50 as “bad,” 50 <75 as "good" and 75-100 as "excellent". Data analysis: The distribution of PSRI scores was assessed by the mean (standard deviation [SD]); the reliability was evaluated by Cronbach's alpha coefficient, to analyze ... (Complete abstract click electronic access below)
Mestre
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Ek, Louise. « The effect of nitrogen starvation on PSI and PSII activity in pea (Pisum sativum) ». Thesis, Halmstad University, School of Business and Engineering (SET), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-143.

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This investigation addresses how photosynthetic efficiency is affected when pea (Pisum sativum) plants are restricted to a sole nitrogen source (i.e. ammonium or nitrate). The pea plants were watered with different nutrient solutions without NO3- or NH4+ for different time-periods in order to assay for nitrogen content. The soluble ammonium and nitrate content was measured throughout the entire growth period. No major differences were observed in nitrogen content during the starvation period up to 25 days. For technical reasons, cultivation of plants could not be extended beyond this time. The chloroplasts and thylakoids were isolated after 25 days and assayed for chlorophyll contents and photosynthetic activity.

The outcome of these tests indicates a small but unambiguous decrease in the photosynthesis activity for all treatments, relative the control.

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Gutkovas, Ramunas. « Exercising Psi-calculi : A Psi-calculi workbench ». Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-157883.

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This thesis presents an automated tool for manipulation and analysis of mobile concurrent systems described in the Psi-calculi framework. Psi-calculi is a family of process calculi, parameterised on data, conditions and a logic. We provide a general framework for implementing instantiations of these parameters, yielding a Psi-calculus. The tool implements simulation of Psi-calculus processes based on symbolic operational semantics, process constants for providing an environment for processes, and a symbolic bisimulation algorithm for checking bisimilarity. The tool has a command interpreter frontend for interactive use.
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Coronel, Castro Marianella, Gutiérrez Claudia Alexandra Echevarría, Montero Manuel Daniel López, Arévalo Alejandro Alonso Rodríguez et Cotrina Alexander Sifuentes. « PSI-SOS ». Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/655499.

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El objetivo del presente plan de negocios es la creación de la empresa PSI-SOS, la cual brinda un servicio de atención online a personas con problemas de salud mental a través de su plataforma web, para lo cual cuenta con un directorio de psicólogos, a quienes se contacta y contrata para brindar un servicio especializado a nuestros usuarios registrados. La empresa está enfocada en la atención a los casos referidos a problemas de salud mental que se vienen dando en la población, sobre todo ahora, en una etapa crucial para la humanidad, como lo es la pandemia del Covid-19, la cual marca un precedente en el  comportamientos de los seres humanos. En PSI-SOS afirmamos que la terapia online es la forma más accesible para una sesión con el psicólogo, por lo cual estructuramos una plataforma interactiva para informar fácilmente a nuestros usuarios potenciales, así como atender a nuestros clientes. Por eso nuestros servicios están distribuidos en paquetes de sesiones para los diversos tipos de necesidades y tratamiento que pueden elegir las personas, asimismo está focalizado en realizar promociones y seguimiento de nuestros clientes para lograr su fidelización a nuestros servicios, lo que también puede ser uno de los factores que aporten un incremento de nuestras ventas. Finalmente, después de un exhaustivo análisis financiero, hemos reconocido un costo de oportunidad del capital (COK) del 9.99% y un costo promedio ponderado (WACC) de 10.96%, cifras claves que validan nuestro plan de negocios confirmando la viabilidad económica de la empresa.
The aim of this business plan is the development of the company PSI-SOS, which provides an online care service to people with mental health problems through its web platform, for which it has a directory of psychologists, at who is contacted and contracted to provide a specialized service to our registered users. The company is focused on attending to cases referring to mental health problems that are occurring in the population, especially now, at a crucial stage for humanity, such as the Covid-19 pandemic, which marks a precedent in the behavior of human beings. At PSI-SOS we affirm that online therapy is the most accessible way for a session with the psychologist, which is why we have structured an interactive platform to easily inform our potential users, as well as serve our clients. That is why our services are distributed in session packages for the various types of needs and treatment that people can choose, it is also focused on promoting and monitoring our clients to achieve their loyalty to our services, which can also be one of the factors that contribute to an increase in our sales. Finally, after an exhaustive financial analysis, we have recognized an opportunity cost of capital (COK) of 9.99% and a weighted average cost (WACC) of 10.96%, key figures that validate our business plan confirming the economic viability of the company.
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Da, Fonseca Paula Cristina Alves. « Structural studies of cyanobacterial PSII ». Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249460.

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Silva, Fábio Eduardo da. « Psi : é possível treinar ? revisando a literatura sobre desenvolvimento psi ». Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/47/47134/tde-09082013-122528/.

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Estuda as experiências anômalas (EAs), as quais podem ser definidas como incomuns e irregulares, ainda que vivenciadas por uma grande parcela da população. Dentre a variedade de EAs, concentra-se nas experiências relacionadas a psi, que incluem duas categorias. A primeira abrange relatos de percepção extra-sensorial (ESP), ou seja, indicativos da capacidade de se obter informação sem a utilização dos canais sensoriais ou de inferências lógicas. A segunda é chamada de Psicocinesia (PK) e refere-se a relatos da ação ou efeito da mente sobre a matéria, ou seja, quando as preferências ou pensamentos de pessoas parecem afetar o ambiente físico, sem a mediação do sistema muscular ou outra força física ou mecanismo físico reconhecido. Investiga se: a) é possível treinar pessoas para estarem mais aptas para perceber e utilizar os fenômenos psi no contexto experimental e b) se a manipulação de certos fatores pode aumentar significativamente os índices de psi em laboratório. Para tanto, revisa e discute por meio de sistematização a eficácia das pesquisas de treinamentos psi (TP) e os resultados de estudos que manipulam variáveis consideradas psicondutivas (VCP). Agrupa os estudos nestas duas categorias (TP e VCP), considerando variáveis específicas e comuns para os dois grupos. Avalia os estudos em blocos, segundo as variáveis consideradas, com ênfase nos dados estatísticos e do método. A revisão da literatura ocorre de março de 2007 a fevereiro de 2008 e abrange livros e artigos científicos relacionados ao tema. 128 estudos são revisados, sendo 87 deles relacionados a manipulação de VCP e 41 relacionados ao TP, totalizando 9.153 participantes em 845.815 ensaios. Avalia que 37% dos estudos TP são criticados, sendo a maior parte das críticas endereçada a problemas de método, enquanto que 16% dos estudos VCP recebem críticas. Conclui que os estudos não são eficazes em treinar psi ou manipular variáveis psi-condutivas, ainda que a maior parte deles obtenha resultados significativos e na direção esperada. De uma forma geral eles falham em termos da elaboração de métodos capazes de excluir hipóteses alternativas àquelas testadas, sendo que as principais falhas são: 1. falta de grupos controle; 2. controle inadequado da variável crença, tanto em relação aos sujeitos como aos pesquisadores; 3. falha em avaliar o real aprendizado; a maioria dos estudos são de curta ou curtíssima duração e sem a avaliação e/ou correlação dos fatores, aos quais se atribui aprendizado, com os escores psi. Com exceção de um estudo, os demais não apresentam testes posteriores para verificar a possível manutenção dos níveis de psi alcançados; 4. o efeito experimentador psi e psicológico é amplamente ignorado pela maioria dos estudos; 5. falta de parâmetros padrões para avaliar determinadas características ou estados (ex. hipnose, meditação, ganzfeld); 6. falta de uma abordagem sistêmica e integrada em relação aos fenômenos psi, aos métodos para testá-los e as múltiplas variáveis passíveis de influenciá-lo. Considera estas falhas apresentando sugestões para superá-las e uma proposta inicial exploratória de treinamento psi
This dissertation is about studies of anomalous experiences (AEs), which can be defined as uncommon and irregular, but reported by a large segment of the population. Among the variety of AEs, this work concentrates on psi-related experiences, which includes two categories. The first are reports of extrasensory perception (ESP), which suggest the capacity of obtaining information without the use of the sensory channels or logical inference. The second is called of psychokinesis (PK), which refers to reports of the action or effect of the mind on matter, or when people\'s thoughts seem to affect the physical environment, without the mediation of the muscular system, a physical force, or a recognized physical mechanism. The study explores if: a) it is possible to train people to be more capable to perceive and use psi phenomena in the experimental context and, b) if the manipulation of some factors can increase psi scores significantly in the laboratory. A review of the research on the effectiveness of psi trainings (PT) and of studies that manipulate psi-conductive variables (PCV) is presented. The studies are grouped in these two categories (PT and PCV), considering specific and common variables for both groups. Studies are evaluated in subgroups, according to specific variables, with emphasis on statistics and methods. The literature review was conducted from March 2007 to February 2008, and it includes books and scientific papers on the topic. 128 studies are reviewed; 87 of them about the manipulation of VCP and 41 of TP, for a total of 9.153 participants in 845.815 trials. 37% of the TP studies are criticized, mostly on methodological grounds, while the same was the case for 16% of the VCP studies. Although most of the studies obtained significant results in the expected direction, it is concluded that they are not effective to train psi or to manipulate psiconductive variables. In general they fail in terms of the elaboration of methods capable to exclude alternative hypotheses, and the main flaws are: 1. lack of control groups; 2. inappropriate control of the variable of belief, for both the subjects and researchers; 3. lack of evaluation of learning; most of the studies were of brief duration and without the evaluation and/or correlation of the factors to which learning is attributed, and in relation to psi scores. With the exception of one study, the rest do not present subsequent analyses to verify the possible maintenance of the psi levels obtained; 4. the experimenter effect (psi and psychological) is ignored completely in most of the studies; 5. lack of standard parameters to evaluate certain characteristics or states (for example hypnosis, meditation, ganzfeld); 6. lack of a systemic and integrated approach in relation to psi phenomena, to the methods used to test them, and to multiple variables that may influence them. In addition to discussing these problems, suggestions are presented to improve the situation, together with an exploratory initial proposal for psi training
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Åman, Pohjola Johannes. « Verifying Psi-calculi ». Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-132192.

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Psi-calculi are mobile process calculi, parametrised with arbitrary nominal datatypes representing data, communication channels, assertions and conditions, as well as morphisms over those datatypes. The framework for psi-calculi has been formalised in the interactive theorem prover Isabelle, along with both strong and weak bisimulation. This master's thesis project presents a tool for formally verifying that psi-calculus candidates are well-defined within the Isabelle/HOL-Nominal framework. It employs custom-made, heuristic proof tactics that discharge as many proof obligations as possible automatically, and passes any remaining proof obligations back to the user, who must supply manual proofs. The implementation of the tool as well as the proof strategies employed are described. The tool is applied to verify encodings of both the monadic and polyadic variants of the pi-calculus, as well as the pi-F calculus.
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Hitchman, Glenn A. « Testing the psi mediated instrumental response theory using an implicit psi task ». Thesis, University of Northampton, 2012. http://nectar.northampton.ac.uk/8859/.

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Livres sur le sujet "PSRI"

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Institute, University of Nairobi Population Studies and Research. Annotated bibliography of research projects undertaken by PSRI Post Graduate Diploma graduands, 1987-1992. Nairobi, Kenya : Population Studies and Research Institute, University of Nairobi, 1992.

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Lawrence, Ikamari, dir. Annotated bibliography of research projects undertaken by PSRI : Post Graduate Diploma graduands, 1993-1999. Nairobi, Kenya : Population Studies and Research Institute, University of Nairobi, 2000.

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Lawrence, Ikamari, dir. Annotated bibliography of research projects undertaken by PSRI : Masters of Arts/Science graduands, 1993-1999. Nairobi, Kenya : Population Studies and Research Institute, University of Nairobi, 2000.

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University of Nairobi. Population Studies and Research Institute. Annotated bibliography of research projects undertaken by PSRI Masters of Arts/Science graduands, 1982-1992. Nairobi, Kenya : Population Studies and Research Institute, University of Nairobi, 1992.

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1928-, Spreslis A., Žagars Ē, Karali͡u︡n V. I͡U︡, Neilands N, Ronis Indulis, Latvia Ārlietu ministrija et Vēstures institūts (Latvijas PSR Zinātn̦u akadēmija), dir. Padomju varas atjaunošana Latvijā un Latvijas PSR iestāšanās PSRS sastāvā : Dokumenti un materiāli. Rīga : "Zinātne", 1987.

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Borioni, Paolo. La Base socialdemocratica (1964-1968) : Il gruppo Querci e il dibattito socialista durante l'unificazione PSI-PSDI. Roma : Carocci, 2012.

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Celmin̦a, Helēna. Sievietes PSRS cietumos. Rīga] : Treji devin̦i, 2002.

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Bernard, Beck. Analyse : 2e année PC-PC*-PSI-PSI*. Paris : Hachette supérieur, 2005.

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Psi paszport. Warszawa : Stowarzyszenie "Midrasz", 2008.

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Crni psi. Beograd : Narodna Kniga Alfac2000., 1998.

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Chapitres de livres sur le sujet "PSRI"

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Chinosi, C., et G. Sacchi. « PSRI schemes for shells : a benchmark study ». Dans Numerical Mathematics and Advanced Applications, 347–56. Milano : Springer Milan, 2003. http://dx.doi.org/10.1007/978-88-470-2089-4_32.

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Herranen, Mirkka, Eva-Mari Aro et Taina Tyystjärvi. « Expression of PSII and PSI Genes in Synechocystis 6803 ». Dans Photosynthesis : Mechanisms and Effects, 2913–16. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-3953-3_683.

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Kuang, T. Y., D. C. Peng, C. Q. Tang, T. Z. Li, S. Q. Lou, Q. D. Zhang, B. Y. Zuo et S. Q. Lin. « The Organization of Chlorophyll-Proteins of PSII and PSI on Thylakoid Membrane ». Dans Current Research in Photosynthesis, 335–38. Dordrecht : Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0511-5_72.

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Pichersky, Eran, et Beverley R. Green. « The Extended Family of Chlorophyll A/B-Binding Proteins of PSI and PSII ». Dans Current Research in Photosynthesis, 2459–62. Dordrecht : Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0511-5_554.

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Koike, H., M. Ikeuchi, T. Hiyama, K. Mamada et Y. Inoue. « Identification of PSI and PSII Components from the Cyanobacterium, Synechococcus by N-Terminal Sequencing ». Dans Current Research in Photosynthesis, 351–54. Dordrecht : Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0511-5_76.

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Kozhushkin, Alexander N. « PSI Team ». Dans RoboCup 2000 : Robot Soccer World Cup IV, 457–60. Berlin, Heidelberg : Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-45324-5_60.

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Kozhushkin, Alexander N. « PSI Team ». Dans RoboCup-99 : Robot Soccer World Cup III, 623–27. Berlin, Heidelberg : Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-45327-x_66.

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Jaeschke, Dietrich, et Karsten Pierschke. « PSI AG ». Dans Hightech goes Public, 333–40. Wiesbaden : Gabler Verlag, 2000. http://dx.doi.org/10.1007/978-3-322-84427-9_34.

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Schrimpf, Harald, et Armin Stein. « PSI AG ». Dans Deutsche Standards Beispielhafte Geschäftsberichte, 264–67. Wiesbaden : Gabler Verlag, 2004. http://dx.doi.org/10.1007/978-3-322-99378-6_64.

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Jassem, Krzysztof. « PSI-Toolkit ». Dans Text, Speech and Dialogue, 215–22. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32790-2_26.

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Actes de conférences sur le sujet "PSRI"

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Troxel, S. E., S. K. Rogers, M. Kabrisky et J. P. Mills. « Psri Target Recognition In Range Imagery Using Neural Networks ». Dans 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, sous la direction de Richard D. Juday. SPIE, 1988. http://dx.doi.org/10.1117/12.976605.

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Troxel, Rogers et Kabrisky. « The use of neural networks in PSRI target recognition ». Dans Proceedings of 1993 IEEE International Conference on Neural Networks (ICNN '93). IEEE, 1988. http://dx.doi.org/10.1109/icnn.1988.23895.

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Baisero, Andrea, et Christopher Amato. « Reconciling Rewards with Predictive State Representations ». Dans Thirtieth International Joint Conference on Artificial Intelligence {IJCAI-21}. California : International Joint Conferences on Artificial Intelligence Organization, 2021. http://dx.doi.org/10.24963/ijcai.2021/299.

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Predictive state representations (PSRs) are models of controlled non-Markov observation sequences which exhibit the same generative process governing POMDP observations without relying on an underlying latent state. In that respect, a PSR is indistinguishable from the corresponding POMDP. However, PSRs notoriously ignore the notion of rewards, which undermines the general utility of PSR models for control, planning, or reinforcement learning. Therefore, we describe a sufficient and necessary accuracy condition which determines whether a PSR is able to accurately model POMDP rewards, we show that rewards can be approximated even when the accuracy condition is not satisfied, and we find that a non-trivial number of POMDPs taken from a well-known third-party repository do not satisfy the accuracy condition. We propose reward-predictive state representations (R-PSRs), a generalization of PSRs which accurately models both observations and rewards, and develop value iteration for R-PSRs. We show that there is a mismatch between optimal POMDP policies and the optimal PSR policies derived from approximate rewards. On the other hand, optimal R-PSR policies perfectly match optimal POMDP policies, reconfirming R-PSRs as accurate state-less generative models of observations and rewards.
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Xue, Xin, Yuzhen Lin, Chi Zhang, Ye Tian et Chih-Jen Sung. « Experimental Study on NOx and CO Emissions of Aviation Kerosene and Coal-to-Liquid Synthetic Aviation Fuel in a Jet Stirred Combustion Reactor ». Dans ASME Turbo Expo 2014 : Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26003.

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The ever increasing consumption of non-renewable fossil fuels for global economic development leads to serious energy crisis and environmental pollution. Consequently, new alternative fuels and high-efficiency combustion are required to aid the sustainable development of human society. The present paper took the RP-3 aviation kerosene and coal-to-liquid synthetic aviation fuel (manufactured through the Fischer Tropsch process., FT) for object, and experimentally investigated the influences of pressure, inlet temperature and equivalence ratio on the productions of NOx and CO in a jet stirred combustion reactor. The tests were performed under the pressures of 2bar and 3bar, and inlet air temperatures of 550K and 650K, respectively. The equivalence ratio ranged from 0.5 to 1.2. The mean residence time was approximately 8ms. Probe sampling followed by on-line emissions analyzer permitted to measure the concentration of the products. The experimental results show that these two fuels obey the same law with the variations of pressures, inlet temperatures and equivalence ratios. The NOx production increases with the pressure and inlet temperature increasing. The CO decreases with the pressure increasing, while slightly increases with the inlet temperature increasing. Numerical simulations were also performed to investigate the combustion products of these two fuels in the jet stirred combustion reactor. Two PSRs were introduced to simulate the jet flame region and post flame in the recirculation region, respectively. The combustion products of second PSR (PSR2) agreed well with the experimental results by regulating the volume ratio of first PSR (PSR1). Based on the reaction pathway analysis of NO production in present state, it is considered that for these two fuels the NOx production is led by the thermal NO above the equivalence ratio of 0.65, while by the N2O at lower equivalence ratios. With the application of the present alternative fuel and its reaction mechanism, the experimental results of aviation kerosene and Coal-to-Liquid synthetic aviation fuel can be predicted well within a certain state, which requires a further verification in a wider range. Furthermore, the numerical results show that the NO release is insensitive to the reaction components within present experimental states.
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Bhargava, Anuj, Donald W. Kendrick, Meredith B. Colket, William A. Sowa, Kent H. Casleton et Daniel J. Maloney. « Pressure Effect on NOx and CO Emissions in Industrial Gas Turbines ». Dans ASME Turbo Expo 2000 : Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/2000-gt-0097.

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In order to determine the effect of pressure on emissions and stability limit, an experimental and modeling study has been performed jointly by UTRC and DOE-FETC. Experiments have been performed at lean conditions in 100–400 psi range with two different nozzles. Measured NOx and CO concentrations have been modeled with a PSR Network using detailed chemistry. Good agreement between the data and model predictions over a wide range of conditions indicate the consistency and reliability of the measured data and validity of the modeling approach. Experiments were conducted at the DOE-FETC facility in Morgantown. A simple refractory combustor liner with a fuel-air-premixing nozzle was used to map stability margins, emission levels of NOx, CO and combustion efficiency. Each experimental nozzle had a centerbody and wall pilot for flame stabilization. Data was collected at four different pressures of 100, 200, 300 and 400 psi, and at different diffusion pilot and moisture levels. The premixing nozzle hardware could be easily lit and operated over a broad range of flame temperatures with minimal combustion generated noise. Two different nozzles designed at UTRC were used to determine pressure and nozzle effects. Computations were made for comparison with the experiments. GRI Mech 2.11 kinetics and thermodynamic database was used for modeling the flame chemistry. A Perfectly Stirred Reactor (PSR) network code developed internally at UTRC was used to create a network of PSRs to simulate the flame and combustor. A total of 10 to 15 reactors were used in the network. Residence time varied with the flow rates (air was fixed while fuel flow rate was varied in order to obtain the required equivalence ratio, ϕ). Good agreement between the measured and modeled NOx (5–10%) was obtained, but the agreement for CO (model predictions are higher by 30–50%) was not as good as for NOx. The experimental data and the modeling predictions indicate that the NOx emission functionality with pressure is dependent on both equivalence ratio and absolute pressure. The CO levels tend to go down with increase in pressure as P−0.5, at different equivalence ratios, consistent with an equilibrium analysis.
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Elgass, Kirstin, Martina Zell, Veronica G. Maurino et Frank Schleifenbaum. « Determination of the PSI/PSII ratio in living plant cells at room temperature by spectrally resolved fluorescence spectroscopy ». Dans SPIE BiOS, sous la direction de Daniel L. Farkas, Dan V. Nicolau et Robert C. Leif. SPIE, 2011. http://dx.doi.org/10.1117/12.873752.

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Bender, M. D., J. M. Rakowski et M. D. Lipschutz. « Validation of ATI 20-25+Nb™ Alloy at 50,000 Hours in the Recuperator of a Gas Turbine Engine ». Dans ASME Turbo Expo 2012 : Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68163.

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A field test program to validate high temperature oxidation resistance of the ATI 20-25+Nb™ alloy in a Solar Turbines Incorporated Mercury™ 50 gas turbine engine has exceeded 50,000 operating hours. A primary goal of this program is to assess the effect of the actual recuperator operating environment on high temperature degradation of primary surface recuperator (PSR) materials. As PSRs are generally fabricated from thin foil materials, excessive degradation can cause perforation, leading to failure of components. To avoid such problems, PSRs are generally fabricated from nickel-base superalloys or highly-alloyed austenitic stainless steels. Previously, ATI 20-25+Nb (UNS S35140) stainless steel was developed and experimentally shown to have excellent creep resistance and good environmental resistance for a PSR application. This field test program evaluates the long-term performance of this alloy in situ in turbine exhaust and compares it with the more highly alloyed Ni-based 625 superalloy. Sub-size air cell samples of alloy 625 and ATI 20-25+Nb alloy exposed for 50,000 hours (running time) in turbine exhaust were removed and tested for materials characterization. Analysis showed that both alloy 625 and ATI 20-25+Nb alloy exhibit excellent long-term resistance to environmental degradation, even after service exposure equivalent to over 5.5 years.
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Shah, Manan, Kaushal Thakkar, Arpitkumar Parmar et Pothodi Chackara Vinodkumar. « Status of $\psi (3686)$, $\psi (4040)$, $\psi (4160)$, $Y (4260)$, $\psi (4415)$ and $X (4630)$ charmonia like states ». Dans Xth Quark Confinement and the Hadron Spectrum. Trieste, Italy : Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.171.0329.

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Bhargava, Anuj, Med Colket, William Sowa, Kent Casleton et Dan Maloney. « An Experimental and Modeling Study of Humid Air Premixed Flames ». Dans ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-008.

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An experimental and modeling study has been performed jointly by UTRC and DOE-FETC to determine the effect of humidity in the combustion air on emissions and stability limits of gas turbine premixed flames. This study focuses on developing gas turbine combustor design criteria for the Humid Air Turbine (HAT) cycle. The experiments were conducted at different moisture levels (0%, 5%, 10% and 15% by mass in the air), at a total pressure of 200 psi, pilot levels (0%, 1%, 3% and 5% total fuel), and equivalence ratio (0.4 to 0.8 depending on the moisture levels). The moisture levels were achieved by injecting steam into dry air well upstream of the fuel-air premixing nozzle. Computations were made for comparison to the experiments using GRI Mech 2.11 kinetics and thermodynamic database for modeling the flame chemistry. A Perfectly Stirred Reactor (PSR) network code was used to create a network of PSRs to simulate the flame. Excellent agreement between the measured and modeled NOx (5–10%) was obtained. Trends of added moisture reducing NOx and the effects of equivalence ratio and piloting level were well predicted. The CO predictions were higher by about 30–50%. The CO discrepancies are attributed to in-probe oxidation. The agreement between the data and model predictions over a wide range of conditions indicate the consistency and reliability of the measured data and usefulness of the modeling approach. An analysis of NOx formation revealed that at constant equilibrium temperature, Teq, the presence of steam leads to lower O-atom concentration which reduces “Zeldovich and N2O” NOx while higher OH-atom concentration reduces “Fenimore” NOx.
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Kupsc, Andrzej. « Precision hyperon physics at J/$\psi$ and $\psi'$ factories ». Dans 10th International Workshop on Charm Physics. Trieste, Italy : Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.385.0009.

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Rapports d'organisations sur le sujet "PSRI"

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Nelson, Nathan, et Charles F. Yocum. Structure, Function and Utilization of Plant Photosynthetic Reaction Centers. United States Department of Agriculture, septembre 2012. http://dx.doi.org/10.32747/2012.7699846.bard.

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Light capturing and energy conversion by PSI is one of the most fundamental processes in nature. In the heart of these adaptations stand PSI, PSII and their light harvesting antenna complexes. The main goal of this grant proposal was to obtain by X-ray crystallography information on the structure of plant photosystem I (PSI) and photosystem II (PSII) supercomplexes. We achieved several milestones along this line but as yet, like several strong laboratories around the world, we have no crystal structure of plant PSII. We have redesigned the purification and crystallization procedures and recently solved the crystal structure of the PSI supercomplex at 3.3 Å resolution. Even though this advance in resolution appears to be relatively small, we obtained a significantly improved model of the supercomplex. The work was published in J. Biol. Chem. (Amunts et al., 2010). The improved electron density map yielded identification and tracing of the PsaK subunit. The location of an additional 10 ß-carotenes, as well as 5 chlorophylls and several loop regions that were previously uninterruptable have been modeled. This represents the most complete plant PSI structure obtained thus far, revealing the locations of and interactions among 17 protein subunits and 193 non-covalently bound photochemical cofactors. We have continued extensive experimental efforts to improve the structure of plant PSI and to obtain PSII preparation amenable to crystallization. Most of our efforts were devoted to obtain well-defined subcomplexes of plant PSII preparations that are amenable to crystallization. We studied the apparent paradox of the high sensitivity of oxygen evolution of isolated thylakoids while BBY particles exhibit remarkable resilience to the same treatment. The integrity of the photosystem II (PSII) extrinsic protein complement as well as calcium effects arise from the Ca2+ atom associated with the site of photosynthetic water oxidation were investigated. This work provides deeper insights into the interaction of PsbO with PSII. Sight-directed mutagenesis indicated the location of critical sites involved in the stability of the water oxidation reaction. When combined with previous results, the data lead to a more detailed model for PsbO binding in eukaryotic PSII.
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Kirchhoff, Helmut, et Ziv Reich. Protection of the photosynthetic apparatus during desiccation in resurrection plants. United States Department of Agriculture, février 2014. http://dx.doi.org/10.32747/2014.7699861.bard.

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In this project, we studied the photosynthetic apparatus during dehydration and rehydration of the homoiochlorophyllous resurrection plant Craterostigmapumilum (retains most of the photosynthetic components during desiccation). Resurrection plants have the remarkable capability to withstand desiccation, being able to revive after prolonged severe water deficit in a few days upon rehydration. Homoiochlorophyllous resurrection plants are very efficient in protecting the photosynthetic machinery against damage by reactive oxygen production under drought. The main purpose of this BARD project was to unravel these largely unknown protection strategies for C. pumilum. In detail, the specific objectives were: (1) To determine the distribution and local organization of photosynthetic protein complexes and formation of inverted hexagonal phases within the thylakoid membranes at different dehydration/rehydration states. (2) To determine the 3D structure and characterize the geometry, topology, and mechanics of the thylakoid network at the different states. (3) Generation of molecular models for thylakoids at the different states and study the implications for diffusion within the thylakoid lumen. (4) Characterization of inter-system electron transport, quantum efficiencies, photosystem antenna sizes and distribution, NPQ, and photoinhibition at different hydration states. (5) Measuring the partition of photosynthetic reducing equivalents between the Calvin cycle, photorespiration, and the water-water cycle. At the beginning of the project, we decided to use C. pumilum instead of C. wilmsii because the former species was available from our collaborator Dr. Farrant. In addition to the original two dehydration states (40 relative water content=RWC and 5% RWC), we characterized a third state (15-20%) because some interesting changes occurs at this RWC. Furthermore, it was not possible to detect D1 protein levels by Western blot analysis because antibodies against other higher plants failed to detect D1 in C. pumilum. We developed growth conditions that allow reproducible generation of different dehydration and rehydration states for C. pumilum. Furthermore, advanced spectroscopy and microscopy for C. pumilum were established to obtain a detailed picture of structural and functional changes of the photosynthetic apparatus in different hydrated states. Main findings of our study are: 1. Anthocyan accumulation during desiccation alleviates the light pressure within the leaves (Fig. 1). 2. During desiccation, stomatal closure leads to drastic reductions in CO2 fixation and photorespiration. We could not identify alternative electron sinks as a solution to reduce ROS production. 3. On the supramolecular level, semicrystalline protein arrays were identified in thylakoid membranes in the desiccated state (see Fig. 3). On the electron transport level, a specific series of shut downs occur (summarized in Fig. 2). The main events include: Early shutdown of the ATPase activity, cessation of electron transport between cyt. bf complex and PSI (can reduce ROS formation at PSI); at higher dehydration levels uncoupling of LHCII from PSII and cessation of electron flow from PSII accompanied by crystal formation. The later could severe as a swift PSII reservoir during rehydration. The specific order of events in the course of dehydration and rehydration discovered in this project is indicative for regulated structural transitions specifically realized in resurrection plants. This detailed knowledge can serve as an interesting starting point for rationale genetic engineering of drought-tolerant crops.
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Abe, F. J/{psi} and {psi}{prime} production at CDF. Office of Scientific and Technical Information (OSTI), juillet 1996. http://dx.doi.org/10.2172/282852.

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Ohad, Itzhak, et Himadri Pakrasi. Role of Cytochrome B559 in Photoinhibition. United States Department of Agriculture, décembre 1995. http://dx.doi.org/10.32747/1995.7613031.bard.

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The aim of this research project was to obtain information on the role of the cytochrome b559 in the function of Photosystem-II (PSII) with special emphasis on the light induced photo inactivation of PSII and turnover of the photochemical reaction center II protein subunit RCII-D1. The major goals of this project were: 1) Isolation and sequencing of the Chlamydomonas chloroplast psbE and psbF genes encoding the cytochrome b559 a and b subunits respectively; 2) Generation of site directed mutants and testing the effect of such mutation on the function of PSII under various light conditions; 3) To obtain further information on the mechanism of the light induced degradation and replacement of the PSII core proteins. This information shall serve as a basis for the understanding of the role of the cytochrome b559 in the process of photoinhibition and recovery of photosynthetic activity as well as during low light induced turnover of the D1 protein. Unlike in other organisms in which the psbE and psbF genes encoding the a and b subunits of cytochrome b559, are part of an operon which also includes the psbL and psbJ genes, in Chlamydomonas these genes are transcribed from different regions of the chloroplast chromosome. The charge distribution of the derived amino-acid sequences of psbE and psbF gene products differs from that of the corresponding genes in other organisms as far as the rule of "positive charge in" is concerned relative to the process of the polypeptide insertion in the thylakoid membrane. However, the sum of the charges of both subunits corresponds to the above rule possibly indicating co-insertion of both subunits in the process of cytochrome b559 assembly. A plasmid designed for the introduction of site-specific mutations into the psbF gene of C. reinhardtii. was constructed. The vector consists of a DNA fragment from the chromosome of C. reinhardtii which spans the region of the psbF gene, upstream of which the spectinomycin-resistance-conferring aadA cassette was inserted. This vector was successfully used to transform wild type C. reinhardtii cells. The spectinomycin resistant strain thus obtained can grow autotrophically and does not show significant changes as compared to the wild-type strain in PSII activity. The following mutations have been introduced in the psbF gene: H23M; H23Y; W19L and W19. The replacement of H23 involved in the heme binding to M and Y was meant to permit heme binding but eventually alter some or all of the electron transport properties of the mutated cytochrome. Tryptophane W19, a strictly conserved residue, is proximal to the heme and may interact with the tetrapyrole ring. Therefore its replacement may effect the heme properties. A change to tyrosine may have a lesser affect on the potential or electron transfer rate while a replacement of W19 by leucine is meant to introduce a more prominent disturbance in these parameters. Two of the mutants, FW19L and FH23M have segregated already and are homoplasmic. The rest are still grown under selection conditions until complete segregation will be obtained. All mutants contain assembled and functional PSII exhibiting an increased sensitivity of PSII to the light. Work is still in progress for the detailed characterization of the mutants PSII properties. A tobacco mutant, S6, obtained by Maliga and coworkers harboring the F26S mutation in the b subunit was made available to us and was characterized. Measurements of PSII charge separation and recombination, polypeptide content and electron flow indicates that this mutation indeed results in light sensitivity. Presently further work is in progress in the detailed characterization of the properties of all the above mutants. Information was obtained demonstrating that photoinactivation of PSII in vivo initiates a series of progressive changes in the properties of RCII which result in an irreversible modification of the RCII-D1 protein leading to its degradation and replacement. The cleavage process of the modified RCII-D1 protein is regulated by the occupancy of the QB site of RCII by plastoquinone. Newly synthesized D1 protein is not accumulated in a stable form unless integrated in reassembled RCII. Thus the degradation of the irreversibly modified RCII-D1 protein is essential for the recovery process. The light induced degradation of the RCII-D1 protein is rapid in mutants lacking the pD1 processing protease such as in the LF-1 mutant of the unicellular alga Scenedesmus obliquus. In this case the Mn binding site of PSII is abolished, the water oxidation process is inhibited and harmful cation radicals are formed following light induced electron flow in PSII. In such mutants photo-inactivation of PSII is rapid, it is not protected by ligands binding at the QB site and the degradation of the inactivated RCII-D1 occurs rapidly also in the dark. Furthermore the degraded D1 protein can be replaced in the dark in absence of light driven redox controlled reactions. The replacement of the RCII-D1 protein involves the de novo synthesis of the precursor protein, pD1, and its processing at the C-terminus end by an unknown processing protease. In the frame of this work, a gene previously isolated and sequenced by Dr. Pakrasi's group has been identified as encoding the RCII-pD1 C-terminus processing protease in the cyanobacterium Synechocystis sp. PCC 6803. The deduced sequence of the ctpA protein shows significant similarity to the bovine, human and insect interphotoreceptor retinoid-binding proteins. Results obtained using C. reinhardtii cells exposes to low light or series of single turnover light flashes have been also obtained indicating that the process of RCII-D1 protein turnover under non-photoinactivating conditions (low light) may be related to charge recombination in RCII due to back electron flow from the semiquinone QB- to the oxidised S2,3 states of the Mn cluster involved in the water oxidation process.
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dos Santos Assis Jesus, Ana Carolina. Diffractive J/Psi Production ; Produção Difrativa de $J/psi$ no Experimento DØ. Office of Scientific and Technical Information (OSTI), juillet 2007. http://dx.doi.org/10.2172/948181.

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Green, John G., et Francis J. Miller. Examining the Effects of Precision Scheduled Railroading on Intercity Passenger and High-Speed Rail Service. Mineta Transportation Institute, mars 2022. http://dx.doi.org/10.31979/mti.2022.2016.

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More than just scheduling terminal-to-terminal trips for trains, “Precision Scheduled Railroading” (PSR) creates entire point-to-point trip plans for individual railroad shipments. Since precision execution was first put into practice, the benefits to shipment arrival reliability and to freight railroads’ profitability have been demonstrated by its use in several Class One freight railroads. However, the effects of the PSR operating strategy on passenger railway operations in shared freight/passenger corridors has not been studied in detail. This research examines the effects of PSR railroad operations on passenger railways, including measuring “Host Railroad Minutes of Delay per 10,000 Train-Miles” and “On-Time Performance” of individual passenger railways, both intercity and high-speed.
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Schmiedekamp, Carl, et Thomas Shields. General Goals and Characteristic for PSEI Standards. Fort Belvoir, VA : Defense Technical Information Center, août 1992. http://dx.doi.org/10.21236/ada326528.

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Merchant, Bion J. Analysis of SHDAS Platform Evaluation at PSRF. Office of Scientific and Technical Information (OSTI), mars 2016. http://dx.doi.org/10.2172/1561162.

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Lee, William Malcolm. A Measurement of the nuclear dependence of J / psi and psi-prime production. Office of Scientific and Technical Information (OSTI), janvier 1999. http://dx.doi.org/10.2172/1421489.

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Bickel, V. T., B. Moseley, E. Hauber, M. Shirley, J. P. Williams et D. A. Kring. CHARACTERIZATION OF SHADOWED REGIONS AT THE LUNAR SOUTH POLE. Frontier Development Lab, juillet 2022. http://dx.doi.org/10.56272/gqkz6227.

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This image repository contains a total of 576 non map-projected HORUS (Hyper-effective nOise Removal Unet Software) post-processed images of permanently shadowed regions (PSRs) located across the Artemis exploration zone at the lunar south pole (144 individual images).
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