1,720,966 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
KARAKTERISASI DAN SKRINING FITOKIMIA AKAR TABAR KEDAYAN (Aristolochiafoveolata Merr.)
No full textEast Kalimantan has so much plant diversity of the various ethnic Dayak. One is the Tabar Kedayan plants (Aristolochia foveolata), which empirically efficacious as an antidote (anti-venom). However, its usefulness has not been scientifically confirmed, this is due to the small number of scientific studies on the content of secondary metabolites and bioactive compounds contained in the plant Aristolochia foveolata. Characteristics of simplicianot found in Aristolochia foveolata plant monograph book Materia Medika Indonesia (MMI).This study aimed to investigate the characteristics of botanicals and content ofsecondary metabolites of Aristolochia plants foveolata. This study covers the characteristics of simplicia (byorganoleptic, macroscopic and microscopic) and phytochemical screening (inspection/identification of secondary metabolites) from the plant Aristolochia foveolata. Determination results showed that the samples of plants used are Tabar Kedayan Root(Aristolochia foveolata Merr.). Of the genus Aristolochia and family Aristolochiaceae. Tabar Kedayan root powder contained fragments: fibers, cork fragments, starch items, wooden vessels, parenchyma.Characteristic root extract is obtained Tabar Kedayan; condensed form of oily, brown color, typical aromatic odor, bitter taste, pH 5, specific gravity 1.047 g / ml, 31% shrinkage drying, water-soluble compound 42.5%, compound soluble in ethanol 16.13%, yield 25% extract. Tabar Kedayan root contains compounds alkaloids, flavonoids, saponins, tannins, terpenoids and steroids. TLC method using a spray reagent Dragendorf, showed that positive Tabar Kedayan roots contain the alkaloid compound gives red brick staining with Rf value of 0.96
Variations on the Author
Full text link“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
KARAKTERISASI DAN SKRINING FITOKIMIA DAUN KEREHAU (Callicarpa longifolia Lamk.)
Full text linkPlants kerehau empirically used to treat swelling, abdominal pain and diarrhea. Kerehau leaf research data related to quality botanicals have not done, this causes the botanicals and extracts do not have a standard. The purpose of this study to determine the chemical characterization and the compound leaf extract botanicals and kerehau.
The research object leaves kerehau obtained from the village of Muara District Muara Aloh Muntai, made crude drug samples are extracted using maceration method by ethanol 70%. Then examined the macroscopic, microscopic, these characterizations include: water assay, assay of soluble extract in water, soluble extract assay of ethanol, the determination of ash content and assay of acid insoluble ash is then performed phytochemical screening. Data were analyzed using descriptivemethods. The characterization results simplicia, macroscopic kerehau has green leaves, pointed leaf tip, leaf base tapering, serrated leaf edge, the shape of elongated leaves, a single leaf, leaf arrangement pinnate, pinnate leaves arrangement of bones, flesh soft thin leaves, leaf length 10,5- 14 cm and 4-6 cm wide leaves. Microscopic hair bulbs discovered fragment identifier cover, file vessels, glands hair, and stomata calcium oxalate crystal anisositik. The water content of 9.6%, water soluble extract content of 17.7% ethanol soluble extract content of 11.3%, ash content of 6%, acid insoluble ash content of 1%.
The characterization results extract ethanol, 15% water content, water soluble extract content of 40.4% ethanol soluble extract content of 39.9%, ash content of 3.5%, acid insoluble ash content of 0.3%. While the results of the identification of classes of chemical compounds, known kerehau leaf contains flavonoids, tannins, saponins and terpenoids.Plants kerehau empirically used to treat swelling, abdominal pain and diarrhea. Kerehau leaf research data related to quality botanicals have not done, this causes the botanicals and extracts do not have a standard. The purpose of this study to determine the chemical characterization and the compound leaf extract botanicals and kerehau.
The research object leaves kerehau obtained from the village of Muara District Muara Aloh Muntai, made crude drug samples are extracted using maceration method by ethanol 70%. Then examined the macroscopic, microscopic, these characterizations include: water assay, assay of soluble extract in water, soluble extract assay of ethanol, the determination of ash content and assay of acid insoluble ash is then performed phytochemical screening. Data were analyzed using descriptivemethods. The characterization results simplicia, macroscopic kerehau has green leaves, pointed leaf tip, leaf base tapering, serrated leaf edge, the shape of elongated leaves, a single leaf, leaf arrangement pinnate, pinnate leaves arrangement of bones, flesh soft thin leaves, leaf length 10,5- 14 cm and 4-6 cm wide leaves. Microscopic hair bulbs discovered fragment identifier cover, file vessels, glands hair, and stomata calcium oxalate crystal anisositik. The water content of 9.6%, water soluble extract content of 17.7% ethanol soluble extract content of 11.3%, ash content of 6%, acid insoluble ash content of 1%.
The characterization results extract ethanol, 15% water content, water soluble extract content of 40.4% ethanol soluble extract content of 39.9%, ash content of 3.5%, acid insoluble ash content of 0.3%. While the results of the identification of classes of chemical compounds, known kerehau leaf contains flavonoids, tannins, saponins and terpenoids.
Keywords: Callicarpa Longifolia, Characterization, Phytochemical Screening
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Full text linkWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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