1,856 research outputs found
A gest?o da Informa??o e do conhecimento em bibliotecas universit?rias: estudo de caso da Biblioteca UFJF/GV da Universidade Federal de Juiz de Fora ? campus avan?ado Governador Valadares
Esta pesquisa pretende trazer ? luz e cooperar com o desenvolvimento da tem?tica Gest?o da
Informa??o e do Conhecimento em Bibliotecas Universit?rias P?blicas. O estudo tem como
l?cus de pesquisa a Biblioteca UFJF/GV da Universidade Federal de Juiz de Fora ? campus
avan?ado Governador Valadares (UFJF/GV). Em face disto, o problema de pesquisa indaga
quais os limites e possibilidades da aplicabilidade da Gest?o da Informa??o e do
Conhecimento pela Biblioteca UFJF/GV e de seu ?rg?o coordenador, o Centro de Difus?o do
Conhecimento (CDC) no desenvolvimento de produtos e servi?os ofertados ? comunidade
acad?mica. Tem como objetivo analisar os limites e possibilidades da aplicabilidade da GIC
pela Biblioteca UFJF/GV e de seu ?rg?o coordenador, o Centro de Difus?o do Conhecimento
(CDC) na conjuntura da administra??o de bibliotecas. Os aspectos investigados referem-se ?
an?lise das concep??es, estrat?gias e efeitos do uso de instrumentos de GIC como subs?dio ?
gest?o de produtos e servi?os bibliotecon?micos.
A orienta??o metodol?gica apoia-se na obra de Gil (2017) e classifica-se como emp?rica e
social. O problema de pesquisa delineia-se sob o modelo de estudo de caso do tipo ?nico, com
enfoque incorporado, nos moldes de Yin (2001). O trabalho apresenta-se, quanto aos
objetivos, do tipo explorat?rio-descritivo e com abordagem qualitativa. A natureza das fontes
examinadas ? bibliogr?fica e documental. Quanto ? interpreta??o dos dados obtidos, as
categorias anal?ticas estabelecem-se em face do Ciclo do Conhecimento Organizacional
modelado por Choo (2011). Como m?todos de aprecia??o dos dados s?o aplicados as t?cnicas
de an?lise de conte?do, formulado por Bardin (2016), e triangula??o de dados, de Miles e
Huberman (1984). A relev?ncia da pesquisa e do problema investigado vincula-se ao
aperfei?oamento das pr?ticas da Administra??o p?blica, em especial, daquelas orientadas para
o ensino superior. Quanto aos aspectos contribuintes ? teoria, relacionam-se nesta pesquisa, a
generaliza??o natural?stica, a gera??o de sentido e o incremento te?rico. No tocante aos
resultados da investiga??o, reconhece-se que a GIC n?o se consolidou por completo na UFJF
e em seu campus avan?ado. N?o obstante a isto, percebe-se que as ideias e a??es propostas
pelas teorias de aprendizagem organizacional foram traduzidas em diversos momentos nas
pr?ticas organizacionais da UFJF/GV, em especial, na Biblioteca UFJF/GV. Apreende-se que
as cria??es de significados para os agentes organizacionais da Biblioteca UFJF/GV
demandaram maior flexibilidade nos processos representativos da informa??o gerencial ,
assim como ? oportuna a continuidade de implementa??o de TIC?s nos demais ?rg?os da UFJF
e do CDC. Como perspectivas futuras, entende-se que a incorpora??o de uma postura
administrativa e indutiva, voltada aos princ?pios de propaga??o do conhecimento registrado
devem ser cada vez mais conduzidos pelos bibliotec?rios e gestores do sistema CDC.
Depreende-se tamb?m sobre a indispensabilidade da cria??o de um estudo de usu?rios
institucionalizado que possibilite a prospec??o das necessidades dos utentes da Biblioteca
UFJF/GV e dos indicadores concernentes aos produtos e servi?os ofertados pela UFJF/GV.Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Educa??o, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2018.This research aims to bring to light and cooperate with the development of the Information
and Knowledge Management in Public University Libraries. The study has as a research locus
the UFJF / GV Library of the Federal University of Juiz de Fora - Governador Valadares
Advanced Campus (UFJF / GV). In the face of this, the research problem investigates the
limits and possibilities of the applicability of Information and Knowledge Management by the
UFJF / GV Library and its coordinating body, the Knowledge Diffusion Center (CDC) in the
development of products and services offered to the academic community. It aims to analyze
the limits and possibilities of the applicability of GIC by the UFJF / GV Library and its
coordinating body, the Knowledge Diffusion Center (CDC) in the context of library
administration. The aspects investigated refer to the analysis of conceptions, strategies and
effects of the use of GIC instruments as a subsidy to the management of library products and
services. The methodological orientation is based on the work of Gil (2017) and is classified
as empirical and social. The research problem is outlined under the single-case study model
with a built-in approach, following the model of Yin (2001). The work presents, as far as the
objectives, the exploratory-descriptive type and with qualitative approach. The nature of the
sources examined is bibliographical and documentary. As for the interpretation of the data
obtained, the analytical categories are established in the face of the Organizational Knowledge
Cycle modeled by Choo (2011). As methods of data appreciation are applied the techniques
of content analysis, formulated by Bardin (2016), and triangulation of data, Miles and
Huberman (1984). The relevance of the research and of the investigated problem is related to
the improvement of public administration practices, especially those oriented toward higher
education. As for the contributing aspects to the theory, naturalistic generalization, the
generation of meaning and the theoretical increase are related in this research. Regarding the
results of the investigation, it is recognized that GIC has not fully consolidated in the UFJF
and in its advanced campus. In spite of this, we can see that the ideas and actions proposed by
organizational learning theories were translated into several moments in the UFJF/GV
organizational practices, especially in the UFJF/GV Library. It is understood that the creations
of meanings for the organizational agents of the UFJF/GV Library demanded greater
flexibility in the representative processes of managerial information, as well as the continuity
of the implementation of ICTs in the other organs of the UFJF and the CDC. As future
perspectives, it is understood that the incorporation of an administrative and inductive posture,
oriented to the principles of propagation of registered knowledge should be increasingly
conducted by the librarians and managers of the CDC system. It is also evident that the
creation of an institutionalized user study that enables the prospection of users of the UFJF/GV
Library and of the indicators concerning the products and services offered by UFJF/GV is
indispensable
A gest?o da informa??o e do conhecimento em bibliotecas universit?rias: estudo de caso da Biblioteca UFJF/GV da Universidade Federal de Juiz de Fora ? campus avan?ado Governador Valadares
Esta pesquisa pretende trazer ? luz e cooperar com o desenvolvimento da tem?tica Gest?o da
Informa??o e do Conhecimento em Bibliotecas Universit?rias P?blicas. O estudo tem como
l?cus de pesquisa a Biblioteca UFJF/GV da Universidade Federal de Juiz de Fora ? campus
avan?ado Governador Valadares (UFJF/GV). Em face disto, o problema de pesquisa indaga
quais os limites e possibilidades da aplicabilidade da Gest?o da Informa??o e do
Conhecimento pela Biblioteca UFJF/GV e de seu ?rg?o coordenador, o Centro de Difus?o do
Conhecimento (CDC) no desenvolvimento de produtos e servi?os ofertados ? comunidade
acad?mica. Tem como objetivo analisar os limites e possibilidades da aplicabilidade da GIC
pela Biblioteca UFJF/GV e de seu ?rg?o coordenador, o Centro de Difus?o do Conhecimento
(CDC) na conjuntura da administra??o de bibliotecas. Os aspectos investigados referem-se ?
an?lise das concep??es, estrat?gias e efeitos do uso de instrumentos de GIC como subs?dio ?
gest?o de produtos e servi?os bibliotecon?micos.
A orienta??o metodol?gica apoia-se na obra de Gil (2017) e classifica-se como emp?rica e
social. O problema de pesquisa delineia-se sob o modelo de estudo de caso do tipo ?nico, com
enfoque incorporado, nos moldes de Yin (2001). O trabalho apresenta-se, quanto aos
objetivos, do tipo explorat?rio-descritivo e com abordagem qualitativa. A natureza das fontes
examinadas ? bibliogr?fica e documental. Quanto ? interpreta??o dos dados obtidos, as
categorias anal?ticas estabelecem-se em face do Ciclo do Conhecimento Organizacional
modelado por Choo (2011). Como m?todos de aprecia??o dos dados s?o aplicados as t?cnicas
de an?lise de conte?do, formulado por Bardin (2016), e triangula??o de dados, de Miles e
Huberman (1984). A relev?ncia da pesquisa e do problema investigado vincula-se ao
aperfei?oamento das pr?ticas da Administra??o p?blica, em especial, daquelas orientadas para
o ensino superior. Quanto aos aspectos contribuintes ? teoria, relacionam-se nesta pesquisa, a
generaliza??o natural?stica, a gera??o de sentido e o incremento te?rico. No tocante aos
resultados da investiga??o, reconhece-se que a GIC n?o se consolidou por completo na UFJF
e em seu campus avan?ado. N?o obstante a isto, percebe-se que as ideias e a??es propostas
pelas teorias de aprendizagem organizacional foram traduzidas em diversos momentos nas
pr?ticas organizacionais da UFJF/GV, em especial, na Biblioteca UFJF/GV. Apreende-se que
as cria??es de significados para os agentes organizacionais da Biblioteca UFJF/GV
demandaram maior flexibilidade nos processos representativos da informa??o gerencial ,
assim como ? oportuna a continuidade de implementa??o de TIC?s nos demais ?rg?os da UFJF
e do CDC. Como perspectivas futuras, entende-se que a incorpora??o de uma postura
administrativa e indutiva, voltada aos princ?pios de propaga??o do conhecimento registrado
devem ser cada vez mais conduzidos pelos bibliotec?rios e gestores do sistema CDC.
Depreende-se tamb?m sobre a indispensabilidade da cria??o de um estudo de usu?rios
institucionalizado que possibilite a prospec??o das necessidades dos utentes da Biblioteca
UFJF/GV e dos indicadores concernentes aos produtos e servi?os ofertados pela UFJF/GV.Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Educa??o, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2018.This research aims to bring to light and cooperate with the development of the Information
and Knowledge Management in Public University Libraries. The study has as a research locus
the UFJF / GV Library of the Federal University of Juiz de Fora - Governador Valadares
Advanced Campus (UFJF / GV). In the face of this, the research problem investigates the
limits and possibilities of the applicability of Information and Knowledge Management by the
UFJF / GV Library and its coordinating body, the Knowledge Diffusion Center (CDC) in the
development of products and services offered to the academic community. It aims to analyze
the limits and possibilities of the applicability of GIC by the UFJF / GV Library and its
coordinating body, the Knowledge Diffusion Center (CDC) in the context of library
administration. The aspects investigated refer to the analysis of conceptions, strategies and
effects of the use of GIC instruments as a subsidy to the management of library products and
services. The methodological orientation is based on the work of Gil (2017) and is classified
as empirical and social. The research problem is outlined under the single-case study model
with a built-in approach, following the model of Yin (2001). The work presents, as far as the
objectives, the exploratory-descriptive type and with qualitative approach. The nature of the
sources examined is bibliographical and documentary. As for the interpretation of the data
obtained, the analytical categories are established in the face of the Organizational Knowledge
Cycle modeled by Choo (2011). As methods of data appreciation are applied the techniques
of content analysis, formulated by Bardin (2016), and triangulation of data, Miles and
Huberman (1984). The relevance of the research and of the investigated problem is related to
the improvement of public administration practices, especially those oriented toward higher
education. As for the contributing aspects to the theory, naturalistic generalization, the
generation of meaning and the theoretical increase are related in this research. Regarding the
results of the investigation, it is recognized that GIC has not fully consolidated in the UFJF
and in its advanced campus. In spite of this, we can see that the ideas and actions proposed by
organizational learning theories were translated into several moments in the UFJF/GV
organizational practices, especially in the UFJF/GV Library. It is understood that the creations
of meanings for the organizational agents of the UFJF/GV Library demanded greater
flexibility in the representative processes of managerial information, as well as the continuity
of the implementation of ICTs in the other organs of the UFJF and the CDC. As future
perspectives, it is understood that the incorporation of an administrative and inductive posture,
oriented to the principles of propagation of registered knowledge should be increasingly
conducted by the librarians and managers of the CDC system. It is also evident that the
creation of an institutionalized user study that enables the prospection of users of the UFJF/GV
Library and of the indicators concerning the products and services offered by UFJF/GV is
indispensable
Impact of solar photovoltaics on the low-voltage distribution network in New Zealand
Residential rooftop-mounted solar photovoltaic (PV) panels are being installed at an increasing rate, both in New Zealand and globally. There have been concerns over possible issues such as overvoltage and overcurrent. These PV systems are mostly connected at low voltage (LV). This study presents a case study of simulating the entire LV network from a single utility, comprising 10,558 11 kV–415 V transformers and their associated distribution feeders. These results are also presented by network type. Various solar PV penetration levels are added to the model and the power-flow results are presented. From these results, possible maximum limits of solar PV penetration are investigated and measures to alleviate overvoltage problems are simulated. The effect of using PV inverters with voltage regulation is simulated. Results show that some minor overvoltage problems can be expected in the future, particularly in urban areas. However, in most cases the overvoltage would not be much higher than the statutory limit of 1.06 p.u
Frequency and damping of hydrodynamic modes in a trapped Bose-condensed gas
Recently it was shown that the Landau-Khalatnikov two-fluid hydrodynamics
describes the collision-dominated region of a trapped Bose condensate
interacting with a thermal cloud. We use these equations to discuss the low
frequency hydrodynamic collective modes in a trapped Bose gas at finite
temperatures. We derive a variational expressions based on these equations for
both the frequency and damping of collective modes. A new feature is our use of
frequency-dependent transport coefficients, which produce a natural cutoff by
eliminating the collisionless low-density tail of the thermal cloud. Above the
superfluid transition, our expression for the damping in trapped inhomogeneous
gases is analogous to the result first obtained by Landau and Lifshitz for
uniform classical fluids. We also use the moment method to discuss the
crossover from the collisionless to the hydrodynamic region. Recent data for
the monopole-quadrupole mode in the hydrodynamic region of a trapped gas of
metastable He is discussed. We also present calculations for the damping of
the analogous monopole-quadrupole condensate mode in the superfluid
phase.Comment: 22 pages, 10 figures, submitted to Physical Review
In situ H2O2 treatment of blue-green algae contaminated reservoirs causes significant improvement in drinking water treatability.
The evaluation of water quality improvement brought about by in situ treatment of eutrophic water bodies, especially those used for human supply, is a challenging task since each water system responds differently. To overcome this challenge, we applied exploratory factor analysis (EFA) to understand the effects of using hydrogen peroxide (H2O2) on eutrophic water used as a drinking water supply. This analysis was used to identify the main factors that described the water treatability after exposing blue-green algae (cyanobacteria) contaminated raw water to H2O2 at both 5 and 10 mg L-1. Cyanobacterial chlorophyll-a was undetectable following the application of both concentrations of H2O2 after four days, while not causing relevant changes to green algae and diatoms chlorophyll-a concentrations. EFA demonstrated that the main factors affected by both H2O2 concentrations were turbidity, pH and cyanobacterial chlorophyll-a concentration, which are important variables for a drinking water treatment plant. The H2O2 caused significant improvement in water treatability by decreasing those three variables. Finally, the use of EFA was demonstrated to be a promising tool in identifying which limnological variables are most relevant concerning the efficacy of water treatment, which in turn can make water quality monitoring more efficient and less costly
Globular Cluster Systems of Relic Galaxies
We analyse the globular cluster (GC) systems of a sample of 15 massive,
compact early-type galaxies (ETGs), 13 of which have already been identified as
good relic galaxy candidates on the basis of their compact morphologies, old
stellar populations and stellar kinematics. These relic galaxy candidates are
likely the nearby counterparts of high redshift red nugget galaxies. Using
F814W (~I) and F160W (~H) data from the WFC3 camara onboard the Hubble Space
Telescope we determine the total number, luminosity function, specific
frequency, colour and spatial distribution of the GC systems. We find lower
specific frequencies (SN<2.5 with a median of SN=1) than ETGs of comparable
mass. This is consistent with a scenario of rapid, early dissipative formation,
with relatively low levels of accretion of low-mass, high-SN satellites. The GC
half-number radii are compact, but follow the relations found in normal ETGs.
We identify an anticorrelation between the specific angular momentum (lambda_R)
of the host galaxy and the (I-H) colour distribution width of their GC systems.
Assuming that lambda_R provides a measure of the degree of dissipation in
massive ETGs, we suggest that the (I-H) colour distribution width can be used
as a proxy for the degree of complexity of the accretion histories in these
systems.Comment: MNRAS accepte
Development and Validation of a Risk Score for Post-Transplant Lymphoproliferative Disorders among Solid Organ Transplant Recipients
Post-transplant lymphoproliferative disease (PTLD) is a well-recognized complication after transplant. This study aimed to develop and validate a risk score to predict PTLD among solid organ transplant (SOT) recipients. Poisson regression identified predictors of PTLD with the best fitting model selected for the risk score. The derivation cohort consisted of 2546 SOT recipients transpanted at Rigshospitalet, Copenhagen between 2004 and 2019; 57 developed PTLD. Predictors of PTLD were high-risk pre-transplant Epstein-Barr Virus (EBV), IgG donor/recipient serostatus, and current positive plasma EBV DNA, abnormal hemoglobin and C-reactive protein levels. Individuals in the high-risk group had almost 7 times higher incidence of PTLD (incidence rate ratio (IRR) 6.75; 95% CI: 4.00-11.41) compared to the low-risk group. In the validation cohort of 1611 SOT recipients from the University Hospital of Zürich, 24 developed PTLD. A similar 7 times higher risk of PTLD was observed in the high-risk group compared to the low-risk group (IRR 7.17, 95% CI: 3.05-16.82). The discriminatory ability was also similar in derivation (Harrell's C-statistic of 0.82 95% CI (0.76-0.88) and validation (0.82, 95% CI:0.72-0.92) cohorts. The risk score had a good discriminatory ability in both cohorts and helped to identify patients with higher risk of developing PTLD
Phred-Phrap package to analyses tools: a pipeline to facilitate population genetics re-sequencing studies
BACKGROUND: Targeted re-sequencing is one of the most powerful and widely used strategies for population genetics studies because it allows an unbiased screening for variation that is suitable for a wide variety of organisms. Examples of studies that require re-sequencing data are evolutionary inferences, epidemiological studies designed to capture rare polymorphisms responsible for complex traits and screenings for mutations in families and small populations with high incidences of specific genetic diseases. Despite the advent of next-generation sequencing technologies, Sanger sequencing is still the most popular approach in population genetics studies because of the widespread availability of automatic sequencers based on capillary electrophoresis and because it is still less prone to sequencing errors, which is critical in population genetics studies. Two popular software applications for re-sequencing studies are Phred-Phrap-Consed-Polyphred, which performs base calling, alignment, graphical edition and genotype calling and DNAsp, which performs a set of population genetics analyses. These independent tools are the start and end points of basic analyses. In between the use of these tools, there is a set of basic but error-prone tasks to be performed with re-sequencing data.
RESULTS: In order to assist with these intermediate tasks, we developed a pipeline that facilitates data handling typical of re-sequencing studies. Our pipeline: (1) consolidates different outputs produced by distinct Phred-Phrap-Consed contigs sharing a reference sequence; (2) checks for genotyping inconsistencies; (3) reformats genotyping data produced by Polyphred into a matrix of genotypes with individuals as rows and segregating sites as columns; (4) prepares input files for haplotype inferences using the popular software PHASE; and (5) handles PHASE output files that contain only polymorphic sites to reconstruct the inferred haplotypes including polymorphic and monomorphic sites as required by population genetics software for re-sequencing data such as DNAsp.
CONCLUSION: We tested the pipeline in re-sequencing studies of haploid and diploid data in humans, plants, animals and microorganisms and observed that it allowed a substantial decrease in the time required for sequencing analyses, as well as being a more controlled process that eliminates several classes of error that may occur when handling datasets. The pipeline is also useful for investigators using other tools for sequencing and population genetics analyses
A paradigm-shift in water treatment: in-reservoir UV-LED-driven TiO2 photocatalysis for the removal of cyanobacteria: a mesocosm study.
Potentially harmful cyanobacteria challenge potable water treatment globally, with high biomass events, and dissolved toxic and nuisance metabolites. Retrofitting existing water treatment infrastructure is often impractical (if not impossible) and often prohibitively expensive. In a paradigm-shifting move, we propose in-reservoir pre-treatment of cyanobacteria-contaminated raw waters to ease the burden on existing water treatment infrastructure. In an iterative design approach over three years, treatment modules have been designed, refined and optimised, in bench and pilot-scale studies for in-reservoir deployment. TiO2-coated beads made from recycled glass are employed in conjunction with UV-light emitting diodes (LEDs), to create highly reactive hydroxyl radicals that preferably remove cyanobacteria and subsequently released cyanotoxins from raw water. In a mesocosm study using a drinking water reservoir in Brazil, water quality parameters were markedly improved within 72h of deployment and cyanobacterial presence was decreased by over 90% without affecting other phytoplankton communities. The treatment system is virtually plastic-free, low cost, utilises recycled materials and could ultimately be powered by renewable energies, thus providing a true green treatment option. We have conclusively demonstrated that a paradigm-shift towards in-reservoir treatment is not only possible but feasible and can provide a valuable addition to conventional water treatment methods
The optical calcium frequency standards of PTB and NIST
We describe the current status of the Ca optical frequency standards with
laser-cooled neutral atoms realized in two different laboratories for the
purpose of developing a possible future optical atomic clock.
Frequency measurements performed at the Physikalisch-Technische Bundesanstalt
(PTB) and the National Institute of Standards and Technology (NIST) make the
frequency of the clock transition of 40Ca one of the best known optical
frequencies (relative uncertainty 1.2e-14) and the measurements of this
frequency in both laboratories agree to well within their respective
uncertainties.
Prospects for improvement by orders of magnitude in the relative uncertainty
of the standard look feasible.Comment: 13 pages, 11 figures, to appear in Comptes Rendus Physiqu
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