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Search Results: 1 - 10 of 12840 matches for " Laura Reynolds-Keefer "
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The Utility of Vygotskian Behavioral Criteria in the Early Childhood Classroom: Learning from Non-compliance
Laura Reynolds-Keefer
Journal of Educational and Developmental Psychology , 2011, DOI: 10.5539/jedp.v1n1p184
Abstract: Non-compliant behavior in young children is consistently an area of concern for the teachers and caregivers of young children. These behaviors can disrupt learning, teaching and positive social interactions, increase referrals for special services, discourage the teacher, and reduce positive interactions with family. Behaviors such as defiance and non-compliance also present early childhood educators with difficult situations in their classrooms, are often considered indicators of hyperactivity, attachment or relationship disturbances, and a predictors of later academic and socio-emotional problems. Despite being a common concern on the part of both families and caregivers, relatively few tools exist that give early childhood educators ways in which to analyze these difficult behaviors. This study explores the strengths, limitations and utility of the behavioral categories created by Vygotsky in the documentation and analysis of non-compliance in young children in the modern early childhood classroom.
Relativistic Broadening of Iron Emission Lines in a Sample of AGN
Laura W. Brenneman,Christopher S. Reynolds
Physics , 2009, DOI: 10.1088/0004-637X/702/2/1367
Abstract: We present a uniform X-ray spectral analysis of eight type-1 active galactic nuclei (AGN) that have been previously observed with relativistically broadened iron emission lines. Utilizing data from the XMM-Newton European Photon Imaging Camera (EPIC-pn) we carefully model the spectral continuum, taking complex intrinsic absorption and emission into account. We then proceed to model the broad Fe K feature in each source with two different accretion disk emission line codes, as well as a self-consistent, ionized accretion disk spectrum convolved with relativistic smearing from the inner disk. Comparing the results, we show that relativistic blurring of the disk emission is required to explain the spectrum in most sources, even when one models the full reflection spectrum from the photoionized disk.
Electronic journals, scholarly communication and libraries
Keefer, Alice
BiD : Textos Universitaris de Biblioteconomia i Documentació , 2001,
Abstract: El recent auge de les revistes científiques electròniques va tenir els seus inicis quan les biblioteques van comen ar a tenir accés a la World Wide Web (WWW) a mitjan dels noranta. El canvi del paper al suport digital ha afectat l alineament i el paper tradicionals dels principals implicats, bàsicament autors, editors, universitats i biblioteques. L autora ofereix una breu anàlisi de la història de la revista científica, seguida de l evolució de les revistes electròniques durant les dues darreres dècades. L article se centra aleshores en les implicacions que aquestes han tingut en els processos i serveis tradicionals de la biblioteca, com ara selecció, adquisicions, catalogació, emmagatzematge, preservació i serveis a l usuari. A la conclusió, l autora especula sobre l efecte que l edició en el web pot tenir a llarg termini sobre el format que la revista científica ha presentat des de fa més de 300 anys.
Aproximació al moviment open access
Keefer, Alice
BiD : Textos Universitaris de Biblioteconomia i Documentació , 2005,
Abstract: L article descriu els antecedents i l estat actual del moviment open access (OA). Els objectius d aquest moviment, que té les arrels en el desig tradicional dels científics de difondre el seu treball, en la preocupació dels bibliotecaris per la crisi de les revistes i en els aven os tecnològics, van ser articulats formalment en la declaració de la Budapest Open Access Initiative (BOAI) el 2002. Aquesta declaració planteja dues estratègies per arribar a l accés a la informació científica sense cap obstacle econòmic, tècnic o legal: la publicació d articles en revistes OA o el dipòsit dels treballs, per part dels autors, en arxius estables institucionals o temàtics. L article suggereix que aquesta segona ruta sembla oferir possibilitats més bones per assolir l OA a curt termini. Però encara es requereix una gran labor de difusió dels conceptes d OA i de formació dels autors en els procediments per dipositar els seus treballs; és a dir, un conjunt d activitats promocionals per superar un dels grans desafiaments actuals: la inèrcia dels autors.The article describes the background and current state of the open access (OA) movement. Its objectives --with roots in scientists' traditional desire to disseminate their works, in librarians' concerns about the serials crisis, and in technological advances-- were formally articulated in the Budapest Open Access Initiative (BOAI) declaration of 2002. This statement established two strategies for providing access to scientific information without any economic, technical, or legal obstacles: 1) publication of articles in OA journals or 2) deposit by authors of their works in stable institutional or subject-based repositories. The article suggests that this secondEl artículo describe los antecedentes y el estado actual del movimiento Open Access (OA). Los objetivos de dicho movimiento, fruto del tradicional interés de los científicos por difundir su trabajo y de la preocupación de los bibliotecarios por la
Informe de la SLA Global 2000 (Brighton, octubre 2000) : The information age : challenges and opportunities
Keefer, Alice
BiD : Textos Universitaris de Biblioteconomia i Documentació , 2000,
Abstract:
Revistes electròniques, comunicació científica i biblioteques
Keefer, Alice
BiD : Textos Universitaris de Biblioteconomia i Documentació , 2001,
Abstract: El recent auge de les revistes científiques electròniques va tenir els seus inicis quan les biblioteques van comen ar a tenir accés a la World Wide Web (WWW) a mitjan dels noranta. El canvi del paper al suport digital ha afectat l alineament i el paper tradicionals dels principals implicats, bàsicament autors, editors, universitats i biblioteques. L autora ofereix una breu anàlisi de la història de la revista científica, seguida de l evolució de les revistes electròniques durant les dues darreres dècades. L article se centra aleshores en les implicacions que aquestes han tingut en els processos i serveis tradicionals de la biblioteca, com ara selecció, adquisicions, catalogació, emmagatzematge, preservació i serveis a l usuari. A la conclusió, l autora reflexiona sobre l efecte que l edició en el web pot tenir a llarg termini sobre el format que la revista científica ha presentat des de fa més de 300 anys.
Electronic thesis and dissertations conference, University of Pittsburgh, 10-12 de junio de 2009
Keefer, Alice
Revista Espa?ola de Documentación Científica , 2010,
Abstract:
Politics versus Science in the Making of a New Regulatory Regime for Food in Europe
Richard Keefer
European Integration Online Papers , 2001,
Abstract: The European Union's new food regulatory regime can be understood as a political, rather than science-based solution to the problem of recurrent food crises that have threatened the foundations of the single market. The failure of first, mutual trust and subsequently, its remedy, comitology, led to calls for an agency solution. The question of whether to invest an agency with the three powers of risk assessment, communication, and management can be understood as a struggle to define the role of the scientist in the management of regulatory policy. Scientists base their recommendations on probabilities; politicians are accountable to a public that expects government to guarantee zero risk. The outcome, a European Food Authority (EFA), preserves the management function and the Rapid Alert System within the Commission. EFA's success will rest on the harmonization of food law in Member States and the creation of a network between the EFA and Member State food agencies. Satisfaction of these goals, in turn, depends upon transparency, open communication, and willingness to cooperate. An unintended consequence of the new regulatory regime for food may be to strengthen corporate food producers and accelerate food homogeneity within Europe. These processes carry their own set of problems regarding interest group behavior, unconventional political behavior, and voter mobilization. We close the paper with recommendations for future research.
Laboratory Studies of Lead Removal from Liquid Scintillator in Preparation for KamLAND's Low Background Phase
Gregory Keefer
Physics , 2011, DOI: 10.1063/1.3579578
Abstract: The removal of Radon induced Lead from liquid scintillator was extensively studied in preparation for KamLAND's low background phase. This work presents the results from laboratory experiments performed at the University of Alabama and their implications for KamLAND and future low background experiments using carbon based liquid scintillator. It was observed that distillation was the most effective purification procedure and that one must consider a non-polar and non-ionic component of Lead in order to reach the levels of radio-purity required for these new class of ultra-low background experiments.
Genetic Diversity Enhances Restoration Success by Augmenting Ecosystem Services
Laura K. Reynolds, Karen J. McGlathery, Michelle Waycott
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0038397
Abstract: Disturbance and habitat destruction due to human activities is a pervasive problem in near-shore marine ecosystems, and restoration is often used to mitigate losses. A common metric used to evaluate the success of restoration is the return of ecosystem services. Previous research has shown that biodiversity, including genetic diversity, is positively associated with the provision of ecosystem services. We conducted a restoration experiment using sources, techniques, and sites similar to actual large-scale seagrass restoration projects and demonstrated that a small increase in genetic diversity enhanced ecosystem services (invertebrate habitat, increased primary productivity, and nutrient retention). In our experiment, plots with elevated genetic diversity had plants that survived longer, increased in density more quickly, and provided more ecosystem services (invertebrate habitat, increased primary productivity, and nutrient retention). We used the number of alleles per locus as a measure of genetic diversity, which, unlike clonal diversity used in earlier research, can be applied to any organism. Additionally, unlike previous studies where positive impacts of diversity occurred only after a large disturbance, this study assessed the importance of diversity in response to potential environmental stresses (high temperature, low light) along a water–depth gradient. We found a positive impact of diversity along the entire depth gradient. Taken together, these results suggest that ecosystem restoration will significantly benefit from obtaining sources (transplants or seeds) with high genetic diversity and from restoration techniques that can maintain that genetic diversity.
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