Rozprawy doktorskie na temat „Individual use”
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Li, Xueheng. "The socially embedded individual". Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/51300/.
Pełny tekst źródłaNguyen, Ngoc Chan. "Service recommendation for individual and process use". Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00789726.
Pełny tekst źródłaThropp, Jennifer. "INDIVIDUAL PREFERENCES IN THE USE OF AUTOMATION". Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3272.
Pełny tekst źródłaPh.D.
Department of Psychology
Arts and Sciences
Psychology
Rojas-Ferrer, Isabel. "Individual Variation In Information and Its Use". Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42105.
Pełny tekst źródłaLee, Dustin C. "INDIVIDUAL DIFFERENCES IN ESCALATION OF TOBACCO USE: IMPULSIVITY AND ALCOHOL USE". UKnowledge, 2013. http://uknowledge.uky.edu/psychology_etds/26.
Pełny tekst źródłaRhemtulla, Mijke Toine. "Preschoolers' use of abstract individual identity in inductive inference". Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/27086.
Pełny tekst źródłaWildenberg, Esther van den. "Cognitive and biological individual differences in problematic alcohol use". [Maastricht] : Maastricht : Universitaire Pers Maastricht ; University Library, Universiteit Maastricht [host], 2007. http://arno.unimaas.nl/show.cgi?fid=8710.
Pełny tekst źródłaBall, Philip Bokang. "Individual unemployment & its consequences : a regional perspective". Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/38987/.
Pełny tekst źródłaSimms, Sharon. "Team and individual athletes' perceived control and use of imagery". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq30849.pdf.
Pełny tekst źródłaBarnes, Sarah Butler. "Individual differences in learning to use a word processing system". Thesis, University of Bristol, 1993. http://hdl.handle.net/1983/661df1aa-04f9-483f-b897-efc8ea38215f.
Pełny tekst źródłaWinterbottom, Marc. "Individual Differences in the Use of Remote Vision Stereoscopic Displays". Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1433453135.
Pełny tekst źródłaCafferky, Bryan. "Substance use and intimate partner violence: a meta-analysis". Diss., Kansas State University, 2015. http://hdl.handle.net/2097/19014.
Pełny tekst źródłaSchool of Family Studies and Human Services
Jared Anderson
This meta-analysis used data from 285 studies (yielding 983 effect sizes and a combined sample size of 627,726) to quantitatively evaluate the link between substance use and physical intimate partner violence (IPV) perpetration and victimization. Results indicated that overall substance use, alcohol use, and drug use were significantly related to both IPV perpetration and victimization, with mean effect sizes ranging from r =.18 to .23. Moderator analyses also compared males and females for overall substance use, alcohol use, and drug use; subcategories of alcohol use and drug use; and different types of drugs, for males and females, and for IPV perpetration and for victimization. This is the first meta-analysis to compare alcohol versus drug use for IPV perpetration and IPV victimization. The analyses revealed drug use to be a significantly stronger risk marker for victimization, and a non-significantly stronger risk marker for perpetration, compared to alcohol use. Alcohol consequence measures (i.e., abuse and dependence) were significantly stronger risk markers than consumption measures for IPV victimization, but non-significantly different for IPV perpetration. Furthermore, more frequent alcohol use (few times a week, almost daily, and daily) was a significantly stronger risk marker for perpetration compared to other alcohol frequency measures. Drug consequence measures (abuse/dependence) were significantly stronger risk markers for perpetration than simply drug use measures. There were no significant differences between different drug types, and no significant difference between stimulants versus non-stimulants for IPV perpetration and victimization (though these smaller comparisons may have been underpowered, and thus unable to detect differences). The findings of this study are important because they provide the most comprehensive and detailed analysis of the link between substance use and IPV to date.
Rogeri, Patricia Kerches 1986. "Especialização individual no uso do espaço em morcegos frugívoros". [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316232.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-08-19T19:33:41Z (GMT). No. of bitstreams: 1 Rogeri_PatriciaKerches_M.pdf: 2667318 bytes, checksum: dc499b718c54abfc2ceccc3f989caae8 (MD5) Previous issue date: 2011
Resumo: Estudos recentes têm sugerido especialização individual no uso de diferentes recursos por populações de animais. Em paisagens heterogêneas, é provável que ocorra também especialização individual no uso do espaço. Para testar essa hipótese, estudei uma população do morcego frugívoro Sturnira lilium (Chiroptera: Phyllostomidae) em uma área de cerrado no sudeste do Brasil. Testei também a previsão de que o uso das áreas pelos morcegos deve estar relacionado com a diferenças na distribuição espacial das principais plantas-alimento na área. Monitorei por radiotelemetria 13 indivíduos de S. lilium de junho a agosto de 2009 e de junho a agosto de 2010. Para medir a variação interindividual no uso do espaço, usei uma metodologia baseada em redes complexas. Com uma imagem de satélite de alta resolução da área de estudo, determinei 13 subáreas de acordo com o tipo predominante de habitat. Nessas subáreas, estimei a densidade das principais plantas-alimento de S. lilium e contei o número de pontos de atividade estimados para cada indivíduo. As áreas de uso totais estimadas variaram de 4 a 457 ha (110 ± 126,8). Observei grande variação interindividual no uso de áreas nucleares de forrageio (E = 0,80; P < 0,001), porém sem agrupamento ou superdispersão (Cws = -0,115; P = 1). A variação encontrada não foi explicada por sexo ou peso. Dois indivíduos concentraram sua atividade em subáreas com maior densidade de Solanaceae, quatro em subáreas com maior densidade de Piperaceae, e um em subáreas com maior densidade de Cecropiaceae. Estes resultados corroboram a hipótese de especialização individual no uso do espaço pela população de S. lilium estudada, estando a especialização aparentemente ligada à distribuição espacial das plantas-alimento. Essa variação interindividual pode ter consequências sobre a forma como morcegos S.lilium prestam serviços ambientais de dispersão de sementes e conectam elementos de paisagens fragmentadas
Abstract: Recent studies have pointed out individual specialization in resource use in animal populations. In heterogeneous landscapes, there is probably also individual specialization in the use of space. To test this hypothesis, I studied a population of the frugivorous bat Sturnira lilium (Chiroptera: Phyllostomidae) in a cerrado area in southeastern Brazil. I also tested the prediction that the use of areas by bats should be related to differences in spatial distribution among the main food-plants. Thirteen S. lilium bats were radiotracked in June-August 2009 and June-August 2010. To measure individual specialization in space use I used an approach based on network theory. With a high-resolution satellite image of the study area, I determined 13 subareas according to predominant habitat type. In these subareas, I estimated the density of the main food-plants of S. lilium and counted the number of activity points estimated for each individual bat. The estimated total areas of use varied from 4 to 457 ha (110 ± 126,8). I observed large interindividual variation in the use of core foraging areas (E = 0,80; P < 0,001) but no clustering or overdispersion (Cws = -0,115; P = 1). The variation found was not explained by sex or weight. Two individuals concentrated their activity in subareas with higher density of Solanaceae, four in subareas with higher density of Piperaceae, and one in subareas with higher density of Cecropiaceae. These results corroborate the hypothesis of individual specialization in the use of space by the S. lilium population studied, which seems to be linked to uneven distribution of food-plants. This interindividual variation may affect the way S. lilium provides environmental services of seed dispersal and connect elements of fragmented landscapes
Mestrado
Ecologia
Mestre em Ecologia
Franco-Watkins, Ana M. "Examining group and individual approaches to strategy use in frequency judgments". College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/2012.
Pełny tekst źródłaThesis research directed by: Psychology. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Allen, Katherine Stewart. "Perceived Effect of Personal Use of Managerial Workstations on Individual Productivity". ScholarWorks, 1988. http://scholarworks.waldenu.edu/dissertations/6.
Pełny tekst źródłaAnderson, Stacey Jill. "Sex-stereotypes : individual and conditional differences in their activation and use /". For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.
Pełny tekst źródłaHall, Jessica Erin. "Individual differences in the use of distributional information in linguistic contexts". Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6125.
Pełny tekst źródłaDeMarree, Kenneth Gerald. "In Search Of Individual Differences In The Use Of Mental Contents". The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1211468855.
Pełny tekst źródłaFadel, Kelly John. "Infusion of Information Systems: The Role of Adaptation and Individual Cognitions". Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/195745.
Pełny tekst źródłaPalma, Cristián R. (Cristián Ricardo). "The use of tarsal scale patterns to identify individual birds of prey". Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23929.
Pełny tekst źródłaBirds of prey have suffered the shortcomings of artificial marking methods. In light of the known and potential deleterious effects of marking, attention has been focused on developing new techniques to identify individual raptors without attaching artificial markers.
This study investigated the use of tarsal scale patterns as unique individual identifiers in birds of prey. The American kestrel (Falco sparverius) was chosen as a model. Both legs of seventy-five kestrels were photographed over a two-year period.
Photographic comparisons of 150 scale patterns demonstrated the uniqueness of each and therefore its ability to be used as an individual's natural identifier. Furthermore, patterns were found to remain unchanged from one year to the next. These findings support the hypotheses that tarsal scale patterns are unique to each bird and do not change over time.
A method of coding the tarsal scale patterns was developed. These codes can be used in a computerized data base to significantly enhance the speed of pattern searches.
Hoi-Yan, Yau. "Search for individual agency: The use of Japanese adult videos in Taiwan". Thesis, University College London (University of London), 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.534356.
Pełny tekst źródłaTai, Wei-Chun. "Rethinking individual differences and perceived ease of use of E-learning systems". Thesis, Royal Holloway, University of London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582625.
Pełny tekst źródłaGraham, Jane Helen. "Full of empty promises? : exploring what drug use achieves for the individual". Thesis, University of Central Lancashire, 2010. http://clok.uclan.ac.uk/18992/.
Pełny tekst źródłaLittleford, Clare. "Energy use by individual office workers : psychological and contextual influences on behaviour". Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/13554.
Pełny tekst źródłaMeza, Cano José Manuel, Ruiz Mario Ernesto Morales i Macías Rosa del Carmen Flores. "Individual variables related to instruction in the use of Personal Learning Environments". Pontificia Universidad Católica del Perú, 2016. http://repositorio.pucp.edu.pe/index/handle/123456789/117370.
Pełny tekst źródłaEn el presente trabajo se realiza una revisión del concepto de Entorno Personal deAprendizaje (EPA), de los escenarios en los que se han utilizado, de las principales problemáticas y hallazgos. Se revisan los estudios sobre aprendizaje autorregulado y EPA, así como los estudios sobre creencias epistemológicas y el aprendizaje en internet para proponerlos como variables individuales relacionadas con la construcción y uso de un EPA. Posteriormente se realiza una propuesta sobre las actividades a fomentar al utilizar en este tipo de entornos, las cuales se debentomar en cuenta para el desarrollo de situaciones instruccionales.
O trabalho que apresentamos relaciona-se com uma revisão do conceito deAmbiente Pessoal de Aprendizagem (EPA), dos cenários que têm sido utilizados, dos principais temas e conclusões. Estamos revisando estudos sobre a aprendizagem auto-regulada e EPA, bem como os estudos sobre as crenças epistemológicas e a aprendizagem on-line para propô-las como variáveis individuais relacionadas com a construção e utilização dum EPA. Posteriormente, realiza-se uma proposta sobre as actividades para promover a utilização nesses ambientes, que devem ser levados em conta na hora do desenvolvimento das situações de instrução.
Ritchie, Sandra S. "Children's use of power strategies the effect of situational and individual differences". CSUSB ScholarWorks, 1985. https://scholarworks.lib.csusb.edu/etd-project/184.
Pełny tekst źródłaLubega, Jude Thaddeus. "Use of tracking to support individual learning in a real-time process". Thesis, University of Reading, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485508.
Pełny tekst źródłaHeijnen, M. "Shared sanitation facilities versus individual household latrines : use, pathogen exposure and health". Thesis, London School of Hygiene and Tropical Medicine (University of London), 2015. http://researchonline.lshtm.ac.uk/2145998/.
Pełny tekst źródłaKharlamov, Alexander A. "Exploring the contribution of individual differences and planning policy parameters to demand planning performance". Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/90832/.
Pełny tekst źródłaFox, Alison Ross Craven. "An exploration of individual emergent leaders' identity development through the use of learning". Thesis, Open University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551617.
Pełny tekst źródłaBonnet-Lebrun, Anne-Sophie. "Intraspecific variation in environmental and geographic space use : insights from individual movement data". Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275584.
Pełny tekst źródłaWebber, Teresa Elisabeth. "An investigation of management learning during mid career masters degree courses which use action strategies". Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341076.
Pełny tekst źródłaManaay, Soledad Muesco. "Discipline in the Philippine Context| Factors Affecting Parents' Use of Corporal Punishment". Thesis, The Chicago School of Professional Psychology, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3613455.
Pełny tekst źródłaThe purpose of this study was to explore the attitudes and practice of corporal punishment (CP) among Filipino parents and the factors that may impact their use of harsh punishment. Thirty-five parents, between the ages of 33 and 55 years old, participated in a group survey that was held in Manila, Philippines.
It was predicted that CP, as a form of discipline, would be prevalent among Filipino parents; it was also predicted that CP would be higher among parents of low economic status and that there were mitigating factors that impact Filipino parents' use of CP. Based on quantitative and qualitative analysis of the data collected, this study did not support all three hypotheses, although it showed that the use of CP was relatively high at 37%.
This study may provide evidence of a need for social support for both parents and children through family intervention programs and parenting training.
Harmon, Mary P. "Disentangling Individual and Community Effects on Environmentally Sensitive Behaviors". Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/sociology_diss/48.
Pełny tekst źródłaBranscome, Roderick Eli. "The Relationship between Substance Use Problems, Family Communication, Forgiveness, and Male Childhood Sexual Abuse". Thesis, The University of North Carolina at Charlotte, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10928397.
Pełny tekst źródłaBoys who were sexually abused in childhood are three times as likely to report substance use problems that are associated with poor mental and physical health as well as academic, vocational, and interpersonal difficulties. A review of literature revealed commonly held beliefs that (a) boys are not vulnerable to childhood sexual abuse; (b) boys are collaborators more so than victims; (c) sexual activity is a rite of passage for boys; (d) sexual activity is synonymous with masculinity. Self-blame may be the result of these patriarchal and misogynistic cultural norms. This study hypothesized that forgiveness can replace substance use as a coping strategy.
This research examined the relationship between substance use problems, family communication, and forgiveness in men who were sexually abused in childhood. The sample consisted of 406 men who completed an anonymous survey distributed via national support and advocacy organizations. Variables were measured with the CAGE-AID; the Family Communication Scale, Heartland Forgiveness Scale, and the Adverse Childhood Experiences Questionnaire. Three dimensions of forgiveness were assessed, (a) forgiveness of self; (b) forgiveness of others; (c) forgiveness of situations.
Findings revealed statistical significance (p = .030) that forgiveness of self is inversely related to substance use problems in men who were sexually abused in childhood. Logistic regression analysis indicated that family communication, forgiveness of others, and forgiveness of situations did not contribute to substance use problems in this sample. Results suggest that higher scores for forgiveness of self are related to lower rates of substance use problems.
Checon, Bianca Quirantes. "Limited attention, the use of accounting information and its impacts on individual investment decision making". Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/12/12136/tde-24082018-153805/.
Pełny tekst źródłaA medida que a complexidade da tecnologia e dos mercados de capitais aumentou, o montante da informação contábil divulgada pelas empresas em seus relatórios financeiros também aumentou. Atualmente, chegamos a um impasse, onde é questionável se mais informações reduzem a assimetria de informações. Autores anteriores criticam fortemente o tamanho das demonstrações financeiras e relatórios anuais, argumentando que eles devem comunicar mais ao invés de apenas serem volumosos, já que o atual volume de informações pode ser contraproducente para o indivíduo médio adquirir, reter e processar todas as informações disponíveis. Com base na evidência de literatura contábil anterior sobre o formato de apresentação e as teorias de psicologia, teoria da atribuição e teoria da carga cognitiva, temos a hipótese de que, ao manipular informações contábeis através de um formato amplamente mais acessível, como a narrativa, os investidores individuais serão capazes de compreender melhor as informações contábeis e, posteriormente, ter um uso mais proeminente delas em relação às atuais informações não fundamentais disponíveis para uma avaliação de decisão de investimento. Para alcançar nosso objetivo de pesquisa, utiliza-se uma estratégia de pesquisa de método misto com um Desenho Sequencial Exploratório, o método qualitativo atua como uma preparação para o quantitativo. Como método qualitativo, entrevistou-se - usando a abordagem da Metodologia Q - 31 sujeitos, sendo 13 analistas/investidores profissionais e 18 investidores individuais. O objetivo nesta fase foi entender o padrão de comportamento de uso de informações contábeis/não-contábeis por analistas/investidores profissionais, em comparação com as escolhas de informações de investidores individuais. Ao fazê-lo, puderam-se usar os resultados obtidos das entrevistas para basear as escolhas de informações experimentais em relação a (a) quais peças de informação contábil eram mais preferíveis aos investidores profissionais e (b) a sequência de apresentação de informações a seguir na configuração experimental. Em seguida, desenvolve-se um design experimental 2 x 2 entre os sujeitos em que manipulamos o formato de apresentação de uma empresa hipotética entre o design tradicional \'tabular e notas explicativas\' versus o design narrativo apenas de conteúdo. Foi alterado também o desempenho financeiro entre \'bom\' e \'ruim\' para verificar se as variáveis de interesse impactam (a) propensão de investimento nas ações da empresa e (b) a quantidade de informações recuperadas da memória. Como nossos principais resultados, identificamos que o formato narrativo individualmente não afeta a propensão de investimento e que o formato de apresentação alternativa beneficiou os participantes com menos de 5 anos de experiência de investimento nos mercados de capitais na condição de má performance financeira, ajustando sua propensão ao mesmo nível de investimento de investidores mais experientes.
Lamlert, Wariya, i n/a. "International Uncertainty in the Exceptions for Individual Use in Copyright Law: A Comparative Study of Australia and Thailand". University of Canberra. School of Law, 2007. http://erl.canberra.edu.au./public/adt-AUC20080912.140432.
Pełny tekst źródłaSchlesinger, Carla M., i n/a. "The Role of Individual Differences in Additional Substance Use in a Methadone Maintained Population". Griffith University. School of Psychology, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20061109.150823.
Pełny tekst źródłaPatton, Felix Jonathan. "The use of individual identification in the conservation management of black rhinoceros Diceros bicornis". Thesis, Manchester Metropolitan University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521011.
Pełny tekst źródłaEnsor, Joie. "Evidence synthesis for prognosis and prediction : application, methodology and use of individual participant data". Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7759/.
Pełny tekst źródłaTimmins, Lori L. "Three essays in health economics : determinants of individual health, medical care use, and treatment". Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/51975.
Pełny tekst źródłaArts, Faculty of
Vancouver School of Economics
Graduate
Kranich, Emily R. "Parents' Perspective on Their Child's Use of Voice Output Communication Aids| Challenges, Benefits and Missing Pieces". Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10749976.
Pełny tekst źródłaThis study investigated parents’ experiences, challenges, benefits, and needs regarding their child’s voice output communication aid (VOCA). Three mothers who had children who use a VOCA device as their primary form of communication were recruited from Goodwill of Orange County’s Technology Exchange Center and Prentke Romich Company (PRC) and were interviewed by phone or email questionnaire. Thematic analysis of the interview data revealed four major themes: (a) benefits of VOCA use, (b) barriers to VOCA use, (c) facilitators of VOCA use, and (d) continuing needs of families. The information obtained from this study can be used to better serve families and children who use VOCAs and other AAC devices to avoid barriers (e.g., insufficient training) and abandonment and to foster more successful outcomes. Further research is necessary to continue to investigate the needs of parents in terms of their child’s device as well as the effectiveness of device training programs.
Morley, Lorraine. "Testing for the effects of organisational and individual cognitive-distance in small business and creative industries innovation partnerships". Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/74203/.
Pełny tekst źródłaWong, Mei-fung, i 黃美鳳. "The use of association in Chinese individual oral presentation of Hong Kong form six students =". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37346258.
Pełny tekst źródłaHendricks, Susan M. "Contextual and individual factors and the use of influencing tactics in adult eduction program planning". Virtual Press, 2000. http://liblink.bsu.edu/uhtbin/catkey/1172470.
Pełny tekst źródłaDepartment of Educational Leadership
Villoria, Olegario G. "An operational measure of individual accessibility for use in the study of travel-activity patterns /". The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487599963591884.
Pełny tekst źródłaAllahyar, Maryam. "Individual differences in the use of strategy in spatial orientation : acquiring route and configural knowledge in virtual environments /". Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/9038.
Pełny tekst źródłaIvanov, Danail Ivanov. "ENSURING LONG-TERM ADOPTION OF TECHNOLOGY: MANDATED USE AND INDIVIDUAL HABIT AS FACTORS THAT ESTABLISH TECHNOLOGY INTO HEALTHCARE PRACTICE". online version, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1202717332.
Pełny tekst źródłaWeatherhead School of Management, Department of Information Systems. Includes bibliographical references. Available online via OhioLINK's ETD Center.
Camargo, Lilian Cristina Carvalho. "ESTUDO DA ADOÇÃO INDIVIDUAL DA REDE SOCIAL PROFISSIONAL LINKEDIN". Universidade Metodista de São Paulo, 2015. http://tede.metodista.br/jspui/handle/tede/82.
Pełny tekst źródłaThe turnover intention refers to the probability of individuals leaving their current job. This topic has become relevant to organizations since it is a potential problem, which may affect the organizations competitiveness, amongst other reasons. It is believed that some of the individuals who have turnover intention look for means of communication, new technologies, such as the professional social network LinkedIn, in order to spread their professional information, find professional opportunities by networking, as well as obtain more information about the labor market, besides different other functions. Therefore, the turnover intention may be considered as a previous factor to the individual adoption of the professional social network LinkedIn. This study has analyzed the previous factors that may influence the usage and how they use the professional social network LinkedIn, guided by the theoretical perspective of the Unified Theory of Acceptance and Use of Technology (UTAUT), by Venkatesh et al (2003), and also guided by the scale of the turnover intention, by Siqueira et al (2014)and Van Dam (2008). The research is based on a quantitative investigation approach, in which data collection was done using a research tool, and obtained 292 answered questionnaires, which has made it possible to validate the relations between the constructs of the research model developed for the study of the individual adoption of the professional social network LinkedIn. There was an analysis of structural equations to make the test of the study hypotheses, based on PLS-PM (Partial Least Squares Path Modeling) from which satisfactory measures for all the investigated constructs and proposed models were presented, and all the relations between the constructs were significant. The results obtained by this study confirm the influence of previous factors, such as Performance Expectancy, Effort Expectancy, Social Influence, and Turnover Intention, on the intention of using the professional social network LinkedIn. The study concludes that the Performance Expectancy was revealed to be the greatest influence in the intention of using LinkedIn, since there is the perception that by using it, it is possible to obtain some professional benefits as well as other aspects. The second factor to present the greatest influence was the Turnover Intention, once some individuals, by adopting LinkedIn, may tend to show it to other people or organizations that are interested in their talents, experiences, skills, network and so on. The Effort Expectancy, in turn, showed that some individuals notice it is easy to interact with such technology, and the Social Influence showed that there is the individuals perception as to the influence of their network in their intention of using LinkedIn.
A intenção de rotatividade refere-se à probabilidade de os indivíduos deixarem o seu trabalho atual. Este tema se tornou relevante para as organizações por ser um potencial problema que pode afetar a competitividade das organizações, entre outros motivos. Acredita-se que alguns dos indivíduos com intenção de rotatividade possivelmente buscam meios de comunicação, novas tecnologias, como a rede social profissional LinkedIn objetivando disseminar suas informações profissionais, localizar oportunidades profissionais, obter mais contatos e informações sobre o mercado de trabalho, entre outras possibilidades. Desse modo, a intenção de rotatividade pode ser avaliada como um fator antecedente à adoção individual da rede social profissional LinkedIn. Este estudo analisou os fatores antecedentes que podem influenciar a intenção de uso e o comportamento de uso da rede social profissional LinkedIn, apoiando-se na perspectiva teórica da Teoria Unificada de Aceitação e Uso da Tecnologia (UTAUT), de Venkatesh et al (2003), e na escala de intenção de rotatividade, de Siqueira et al (2014) e Van Dam (2008). A pesquisa fundamenta-se em uma abordagem de investigação quantitativa na qual os dados foram coletados por meio de um instrumento de pesquisa com a obtenção de 292 questionários respondidos, o que possibilitou a validação dos relacionamentos entre os construtos componentes do modelo de pesquisa desenvolvido para o estudo da adoção individual da rede social profissional LinkedIn. Para realizar o teste das hipóteses do estudo, procedeu-se a análise de equações estruturais, com base no PLS-PM (Partial Least Squares Path Modeling) a partir do qual foram apresentadas medidas satisfatórias para os construtos investigados e o modelo proposto, sendo significativas todas as relações entre os construtos. Os resultados obtidos por esta pesquisa confirmam a influência dos fatores antecedentes Expectativa de Desempenho, Expectativa de Esforço, Influência Social e Intenção de Rotatividade na intenção de uso da rede social profissional LinkedIn. O estudo concluiu que Expectativa de Desempenho revelou-se o fator que mais influencia na intenção de uso do LinkedIn, pois há a percepção de que ao utilizar o LinkedIn pode-se obter benefícios profissionais, entre outros aspectos. O segundo fator que apresentou maior influência na intenção de uso do LinkedIn foi a intenção de rotatividade, uma vez que alguns dos indivíduos, ao adotarem o LinkedIn, provavelmente tendem a mostrar para as outras pessoas/organizações interessadas quais são os seus talentos, suas experiências, competências, além de obter mais contatos, entre outros motivos. Já a Expectativa de Esforço demonstrou que alguns indivíduos percebem que é fácil a interação desta tecnologia. A Influência Social constatou que existe a percepção dos indivíduos quanto à influência da sua rede de contatos na intenção de uso do LinkedIn.
Dawson, Daniel. "Stable hydrogen isotope ratios of individual hydrocarbons in sediments and petroleum". Curtin University of Technology, Department of Applied Chemistry, 2006. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=16839.
Pełny tekst źródłaThe δD values of the n-alkanes also reflect their multiple source inputs. For example, a saw-toothed profile of n-alkane δD values in Australian torbanites is attributed to a dual-source system: a predominant B. braunii input, with a minor terrestrial plant input to odd-carbon-numbered n-alkanes in the range n-C20 [subscript] to n-C29 [subscript]. The δD values of n-alkanes and isoprenoids (pristane and phytane) differ significantly in two Permian torbanites from Australia, thought to be reflective of the offset between the δD values of their precursors in extant organisms. The torbanite data indicate that a biological δD signal has been preserved for at least 260–280 million years, extending the utility of δD values for palaeoclimate studies. To elucidate the effect of sedimentary processes on the δD values of petroleum hydrocarbons, three sedimentary sequences have been studied. These comprise one from the Perth Basin (Western Australia) and two from the Vulcan Sub-basin (northern Australia) covering a wide range of maturities, i.e. 0.53–1.6% vitrinite reflectance (Ro). The δD values of n-alkanes extracted from immature-early mature sediments (marine shales/siltstones and mudstones) are consistent with that expected of marine-derived n-alkyl lipids. The hydrocarbons become enriched in D with increasing maturity. The large (ca. 115%) biologically-derived offset between the δD values of n-alkanes and acyclic isoprenoids from immature sediments gradually decreases with increasing maturity, as the isoprenoids become enriched in D more rapidly than the n-alkanes. The D-enrichment in isoprenoids correlates strongly with Ro and traditional molecular maturity parameters.
This suggests that H/D exchange during maturation occurs via a mechanism involving carbocation-like intermediates, which proceeds more rapidly with compounds containing tertiary carbon centres. Significant epimerisation of pristane and phytane coincides with their D-enrichment, suggesting that hydrogen exchange occurs at their tertiary carbons. A mechanism is proposed which can account for both H/D exchange and the epimerisation of pristane and phytane in the sedimentary environment. Pristane and phytane extracted from a post-mature sediment from the Paqualin-1 sequence are significantly enriched in D (ca. 40%) relative to the n-alkanes, indicating that D-enrichment persists at very high maturity, and is more pronounced for the regular isoprenoids than the n-alkanes. This supports the notion that H/D exchange causes the observed shift in δD values, rather than free-radical hydrogen transfer. The differences between the δD values of pristane and phytane show opposite trends in the Perth Basin and Vulcan Sub-basin sediments. In the Perth Basin, phytane is enriched in D relative to pristane, likely due to a dominant algal source. In the Vulcan Sub-basin, pristane is enriched in D relative to phytane, and thus is attributed to a lower relative input of algal organic matter. The variance of the δD values of pristane and phytane is generally consistent throughout the maturity range and provides evidence that pristane and phytane exchange hydrogen at similar rates. δD analysis of crude oils and condensates reservoired in the Perth Basin and Vulcan Sub-basin has been carried out to evaluate potential applications in oil-source correlation.
The n-alkanes from crude oils and condensates are often more enriched in D than n-alkanes extracted from their supposed source rocks, and the oils also show relatively small differences between the δD values of n-alkanes and isoprenoids. These results suggest significant H/D exchange has occurred, implying that the liquids were generated from mature source rocks. A Perth Basin crude oil (Gage Roads-1) thought to be derived from a lacustrine/terrestrial source contains hydrocarbons that are significantly depleted in D relative to Perth Basin oils derived from a marine source, attributed to variability in the isotopic composition of marine and terrestrial source waters. δD values of n-alkanes from Vulcan Sub-basin crude oils and condensates are largely consistent with their prior classification into two groups: Group A, having a marine source affinity; and Group B, having a terrigenous source affinity. Some oils and condensates are suggested to be mixtures of Group A and Group B hydrocarbons, or Group A hydrocarbons and other as yet unknown sources. An exception is a former Group A oil (Tenacious-1) containing n-alkanes that are enriched in D relative to those from other Group A oils and condensates, attributed to mixing with another source of more mature hydrocarbons. The n-alkane δD profile appears to be indicative of source and sedimentary processes. One Perth Basin crude oil (Dongara-14) contains lower-molecular-weight n-alkanes that are depleted in D relative to higher-molecular-weight n-alkanes, attributed to a mixed marine/terrestrial source.
Group A crude oils and condensates from the Vulcan Sub-basin display a ‘bowl-shaped’ profile of n-alkane δD values. An upward inflection in the n-alkane δD profile from n-C11 [subscript] to n-C15 [subscript] is suggested to represent the addition of D-enriched lower-molecular-weight n-alkanes from a more mature wet gas/condensate to an initial charge of lower maturity oil. Ultimately, this project has demonstrated that the δD values of individual petroleum hydrocarbons can be used to elucidate the nature of source organic matter and depositional environments. The preservation potential of lipid δD values is greater than previously thought, although it is clear that H/D exchange accompanying maturation can have a significant effect on the δD values of certain hydrocarbons. Thus, great care must be taken when interpreting δD values of individual hydrocarbons, particularly those derived from sediments of high thermal maturity.