1,720,954 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
Mosquito species composition, abundance and transmission Risk of dengue in Kinondoni district, Dar es salaam, Tanzania
No full textPhD ThesisDar es Salaam city of Tanzania has experienced continued Dengue outbreaks with
increased incidence since 2010. However, there is inadequate evidence of vector dynamics
and transmission risk in the region. This study aimed to determine mosquito species
composition, abundance and transmission risk of Dengue in Kinondoni district, Dar es
Salaam, Tanzania. Specifically, this study aimed to: (i) determine mosquito species
composition and abundance in Kinondoni district; (ii) examine Aedes mosquito breeding
sites and establish container productivity rates; (iii) determine Dengue virus (DENV)
infection rate and genetically characterize DENV in mosquito vectors. This cross-sectional
study was conducted in Kinondoni district, Dar es salaam, Tanzania. Three wards:
Mikocheni, Mwananyamala and Mzimuni were purposively selected. In each ward, three
streets were randomly selected as sampling sites. The study involved sampling adult and
immature mosquitoes, morphological identification and screening for DENV in collected
female Aedes mosquitoes using a one-step reverse transcription polymerase chain reaction
(RT-PCR). Three mosquito species were identified in 2001 collected mosquitoes namely
Culex quinquefasciatus (53.1%), Aedes aegypti (23.2%) and Mansonia mosquitoes (23.6%)
of which Culex quinquefasciatus was observed to be the most abundant species in
Kinondoni district. The common water-holding containers observed to be breeding sites of
Aedes mosquitoes included used car tires, flowerpots and plastic water buckets. The
overall House Index (HI), Container Index (CI) and Breteaux Index (BI) of Kinondoni
district were 55.1%, 60.4% and 114.2, respectively. DENV was not detected in all collected
female Aedes Mosquitoes. Generally, Kinondoni district continues to be at risk of
transmission of Dengue as Aedes aegypti, a DENV vector was observed to be present.
Although DENV was not detected in mosquito vectors, the presence of potential breeding
sites around Kinondoni district and higher Aedes HI, CI and BI put Kinondoni at risk of
DENV transmission. Vector control interventions specifically integrated mosquito control
approaches are recommended to be directed towards the elimination of breeding sites and
adult mosquitoes.SACIDS Foundatio
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
Mosquito species composition, abundance and transmission Risk of dengue in Kinondoni district, Dar es salaam, Tanzania
No full textPhD ThesisDar es Salaam city of Tanzania has experienced continued Dengue outbreaks with
increased incidence since 2010. However, there is inadequate evidence of vector dynamics
and transmission risk in the region. This study aimed to determine mosquito species
composition, abundance and transmission risk of Dengue in Kinondoni district, Dar es
Salaam, Tanzania. Specifically, this study aimed to: (i) determine mosquito species
composition and abundance in Kinondoni district; (ii) examine Aedes mosquito breeding
sites and establish container productivity rates; (iii) determine Dengue virus (DENV)
infection rate and genetically characterize DENV in mosquito vectors. This cross-sectional
study was conducted in Kinondoni district, Dar es salaam, Tanzania. Three wards:
Mikocheni, Mwananyamala and Mzimuni were purposively selected. In each ward, three
streets were randomly selected as sampling sites. The study involved sampling adult and
immature mosquitoes, morphological identification and screening for DENV in collected
female Aedes mosquitoes using a one-step reverse transcription polymerase chain reaction
(RT-PCR). Three mosquito species were identified in 2001 collected mosquitoes namely
Culex quinquefasciatus (53.1%), Aedes aegypti (23.2%) and Mansonia mosquitoes (23.6%)
of which Culex quinquefasciatus was observed to be the most abundant species in
Kinondoni district. The common water-holding containers observed to be breeding sites of
Aedes mosquitoes included used car tires, flowerpots and plastic water buckets. The
overall House Index (HI), Container Index (CI) and Breteaux Index (BI) of Kinondoni
district were 55.1%, 60.4% and 114.2, respectively. DENV was not detected in all collected
female Aedes Mosquitoes. Generally, Kinondoni district continues to be at risk of
transmission of Dengue as Aedes aegypti, a DENV vector was observed to be present.
Although DENV was not detected in mosquito vectors, the presence of potential breeding
sites around Kinondoni district and higher Aedes HI, CI and BI put Kinondoni at risk of
DENV transmission. Vector control interventions specifically integrated mosquito control
approaches are recommended to be directed towards the elimination of breeding sites and
adult mosquitoes.SACIDS Foundatio
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
