1,721,507 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Controlo reprodutivo em ovelhas Awassi x Sarda
Get PDFA sazonalidade reprodutiva condiciona a gestão e a rentabilidade das explorações ovinas. Neste sentido, o controlo da actividade reprodutiva permite ajustar os ciclos de produção às necessidades do mercado e à disponibilidade de mão-de-obra. Importa pois conhecer, o melhor possível, a fisiologia da reprodução dos ovinos com que se trabalha, de modo a poder-se estabelecer as melhores estratégias reprodutivas e produtivas.
A revisão bibliográfica da presente dissertação incidiu sobre o ciclo éstrico, a sazonalidade reprodutiva e o controlo da actividade reprodutiva em ovinos.
O trabalho prático teve como principal objectivo estudar a eficácia do protocolo hormonal – PGF2α + Progestagénios (5 dias) + eCG – sobre o controlo da actividade reprodutiva de ovelhas Awassi x Sarda, quando aplicado no mês de Abril. Simultaneamente procurou-se avaliar os efeitos da aplicação de um tratamento prévio com melatonina exógena e comparar a eficácia de dois progestagénios – FGA vs. MAP – e a via de administração da PGF2 α – intramuscular vs. subcutânea.
Concluiu-se que o protocolo estudado foi eficaz no controlo da actividade reprodutiva das ovelhas Awassi x Sarda. A melatonina exógena foi eficaz na interrupção do anestro sazonal, mas não melhorou a resposta reprodutiva das ovelhas ao protocolo aplicado. Os efeitos de ambos os progestagénios foram muito positivos. O MAP apenas foi superior ao FGA na promoção da resposta ovárica. Por seu turno, a administração subcutânea de PGF2α apenas favoreceu a percentagem de ovelhas que formaram, pelo menos, um CL.Seasonality affects the management and profitability of sheep farms. Reproduction control allows adjusting the production cycles to market demands and labor work availability. Knowing the physiology of reproduction is vital to establish the best reproductive and productive strategies.
The review of this thesis will be focus in estrous events, reproduction seasonality and ovarian activity control in sheep.
The main aim of this thesis was to assess the hormonal protocol - PGF2α + progestagens (5 days) + eCG – on the reproduction control of Awassi x Sarda sheep in April. At the same time the effects of a pre-treatment with exogenous melatonin, the effectiveness of two progestagens - FGA vs. MAP - and the route of PGF2α administration - intramuscular vs. subcutaneously - was evaluated.
We concluded that the methodology applied was effective concerning controlling reproductive activity of Awassi x Sarda ewes. Exogenous melatonin it was efficient in seasonal anestrus interruption, but did not improved the reproductive response in this study. Both Progestagenes effects were very effective. MAP was greater than FGA at promoting ovarian response. In other hand PGF2 α subcutaneous administration only promoted ewes percent who formed one corpus luteum
Efeito da administração de três dietas diferentes entre os 4 dias de idade e o desmame sobre o crescimento de vitelas da raça Holstein-Frísia
No full textO grande foco de uma exploração leiteira é maximizar o seu lucro, sem prejuízo do
cumprimento das leis vigentes e do respeito pelo seu bem-estar animal.
O principal objetivo do presente estudo, executado no âmbito da unidade curricular
de Dissertação, Trabalho de Projeto ou estágio, do mestrado em Tecnologias em Ciência
Animal, do Instituto Politécnico de Bragança, foi comparar os efeitos da administração
de três dietas diferentes sobre o crescimento de vitelas da raça Holstein-Frísia, entre os 4
dias de idade e o desmame.
As vitelas estavam alojadas em duas explorações distintas. Entre o nascimento e o
3º dia de vida, todas elas foram alimentadas exclusivamente com colostro. A partir do 4º
dia de vida, elas passaram a ser alimentadas com diferentes tipos de leite de substituição
e de alimento concentrado comercial e feno distribuído ad libitum. Na exploração A, 10
vitelas foram alimentadas com leite de substituição à base de soro de leite e alimento
concentrado comercial starter (mistura de flocos) distribuído ad libitum – Dieta 1. A outra
metade foi alimentada com leite de substituição spray contendo 62% de leite de vaca e
dois tipos de alimentos concentrados comerciais: até aos 30 dias de idade foi administrado
um concentrado starter em farinha (com composição láctea), até perfazer um total de 6
kg/vitela, e posteriormente, até aos 90 dias de idade, um concentrado granulado, ambos
distribuídos ad libitum – Dieta Experimental. Na exploração B, metade das vitelas foram
alimentadas com leite de substituição spray contendo 60% de leite de vaca e alimento
concentrado comercial starter (mistura de flocos) distribuído ad libitum – Dieta 2. A outra
metade foi alimentada com a Dieta Experimental. O crescimento das vitelas foi avaliado
através do peso corporal e do perímetro torácico (PT). Ao 4º dia de vida, elas foram pe-
sadas e medidas pela primeira vez, antes de iniciarem a ingestão de leite de substituição.
As demais pesagens e medições foram realizadas quinzenalmente até ao desmame, ou
seja, aos 90 dias de vida.
De acordo com os resultados observados, o peso corporal das vitelas estudadas au-
mentou mais do que o dobro. O PT aumentou 1,38 vezes. O PT revelou-se um ótimo
estimador do peso vivo (PV), mas não tão bom do ganho médio diário de peso (GMD).
O crescimento das vitelas foi igual nas duas explorações. Na mesma exploração, o cres-
cimento das vitelas não variou em função do indivíduo ou do regime alimentar aplicado.The main goal of a dairy farm is to maximize its profit while ensuring compliance
with current laws and respect for animal welfare.
The main objective of the present study, carried out as part of the Master´s degree
in Animal Science Technologies at the Polytechnic Institute of Bragança, was to compare
the effects of administering three different diets on the growth of Holstein-Friesian calves,
from 4 days old until weaning.
The animals were housed in two separate farms. Between birth and the 3rd day of
life, they were exclusively fed with colostrum. From the 4th day of life, they were fed
with different types of milk replacer and commercial starter feed, along with ad libitum
hay. On farm A, 10 calves were fed a whey-based milk replacer and commercial starter
feed (flake mixture) distributed ad libitum – Diet 1. The other half were fed a spray-dried
milk replacer containing 62% cow's milk and two types of commercial feed: until 30 days
of age, they were given a starter feed in meal form (with milk ingredients) up to a total of
6 kg per calf, and thereafter, until 90 days of age, a pelleted feed, both distributed ad
libitum – Experimental Diet. On farm B, half of the calves were fed a spray-dried milk
replacer containing 60% cow's milk and commercial starter feed (flake mix) distributed
ad libitum – Diet 2. The other half were fed with the Experimental Diet. The growth of
the calves was evaluated by measuring body weight and thoracic perimeter (TP). On the
4th day of life, they were weighed and measured for the first time, before starting the milk
replacer intake. Further weighing’s and measurements were performed every two weeks
until weaning, at 90 days of age.
According to the observed results, the body weight of the studied calves increased
more than doubled. The TP increased by 1.38 times. The TP proved to be an excellent
estimator of live weight (LW), but not as good for estimating average daily weight gain
(ADG). The growth of the calves was the same in both farms. Within the same farm, calf
growth did not vary according to the individual or the applied feeding regime
Conservação de Espécies Animais Selvagens
Get PDFA conservação das espécies animais selvagens constitui um dos principais desafios ambientais da atualidade, devido à crescente perda de biodiversidade e à degradação dos ecossistemas naturais. A presente dissertação aborda as diferentes estratégias de conservação in situ (no habitat natural) e ex situ (sob cuidado humano), destacando a importância da sua integração para a manutenção de populações viáveis e geneticamente sustentáveis. São analisados os principais programas de conservação europeus e internacionais, nomeadamente o European Endangered Species Program (EEP), o European Studbook (ESB) e outros programas de reprodução monitorizada, que visam coordenar esforços entre instituições e assegurar a variabilidade genética das espécies ameaçadas.
Os jardins e os parques zoológicos desempenham um papel multifuncional na conservação da fauna, abrangendo as vertentes educativa, científica, recreativa e conservacionista. Estes espaços são hoje reconhecidos como centros de investigação e sensibilização ambiental, onde se promovem ações de reprodução assistida, reintrodução de espécies e enriquecimento ambiental.
O Zoo Koki, localizado em Espanha, é uma instituição que integra diversos programas de conservação e que utiliza ferramentas tecnológicas como o ZIMS (Zoological Information Management System), fundamentais para a gestão genética e sanitária das populações sob cuidado humano. A cooperação internacional, aliada ao compromisso ético e ao bem-estar animal, é essencial para garantir a sustentabilidade e a preservação da biodiversidade global.The conservation of wild animal species is one of today's major environmental challenges, due to the increasing loss of biodiversity and the degradation of natural
ecosystems. This dissertation examines the various strategies for in situ (in the natural habitat) and ex situ (under human care) conservation, emphasizing the importance of integrating these approaches for maintaining viable and genetically sustainable populations. The main European and international conservation programs are analyzed, namely the European Endangered Species Program (EEP), the European Studbook (ESB), and other monitored breeding programs, which aim to coordinate efforts among institutions and ensure the genetic diversity of endangered species.
Zoos play a multifunctional role in wildlife conservation, covering educational, scientific, recreational, and conservation aspects. These spaces are now recognized as centers for research and environmental awareness, where assisted reproduction, species reintroduction, and environmental enrichment are promoted.
Zoo Koki, located in Spain, is an institution that integrates various conservation programs and uses technological tools such as ZIMS (Zoological Information
Management System), which are fundamental for the genetic and health management of populations under human care. International cooperation, combined with ethical commitment and animal welfare, is essential to ensure the sustainability and preservation of global biodiversity
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