1,720,974 research outputs found
Sintesis Hidrogel Poli(N-Vinil-2-Pirolidon-Asam Tartrat) secara Iradiasi Gamma dan Karakterisasinya
No full textSynthesis of poly(N-vinyl pyrolidone-g-tartaric acid) hydrogel using gamma irradiation had been carried out in two steps. First, irradiation of various concentrations of N-vinyl pyrolidone (NVP) byvarious irradiation doses. The yield of this process was determined by a gravimetric method. Hydrogel with the highest yield was selected for the second step: immersion in various concentrations of tartaric acid (TA) solution followed by irradiation. The yield (grafting percentage) was indirectly determined by a titrimetric method. All hydrogels were tested for their swelling ability (%) in solution of Various pH. The results showed that both NVP concentration and irradiation dose, and also interaction of the two, influenced the yield (gel fraction). The highest gel fraction (99.52%) was obtained from 70% NVP and 40 kGy dose. The result also showed that both TA concentration and irradiation dose, as well asinteraction of the two, influenced the grafting percentage. The highest grafting percentage (42.03%) was obtained by 0.8% TA and 40 kGy dose; while this hydrogel swelled 44.41 times in a pH 8 solution and swelled 42.2 times in a saline solution. The swelling capacity was slightly higher than the SNI 16- 6363-2000 requirement for sanitary napkins, however, lower than the ISO 17190-5-2001 requirement for baby napkins
Kapasitas Pengikatan Iodida dan Iod pada Karbon Aktif Konvensional dan Terbrominasi
No full textRelated to the activities in a radioisotope processing laboratory at CDRR, BATAN, active carbon has a great potency and a role as adsorber for radioisotope immobilizing agent in process and installation systems. KAKEN Corporation, a CDRR's collaboration partner in Japan, has introduced a new type of active carbon namely KAKEN Brominated Active Carbon (KBAC) which is claimed to have an anionic exchange character. The presented experiment was thus performed to determine the iodide and iodine binding capacities of the KBAC resin as well as comparing to those of the conventional active carbon, which was also provided by KAKEN (KCAC). The experiment had been done using solutions of natural iodide and iodide - iodine mixtures. The binding capacities were determined by iodometry and iodatometry. In general the results obtained showed that the iodide-binding capacity of KBAC was higher than that of KCAC, but that the iodine-binding capacity of KCAC was higher. The KBAC showed that the binding capacity of iodide from iodide solutions was smaller than that from iodide-iodine samples, while the KCAC showed the reverse
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
Pemodelan Statistik Pemberian Air Susu Ibu (ASI) Eksklusif Berdasarkan Faktor Demograli
No full textExclusive breastfeeding is defined as giving breast milk to a baby without any additional drink, food or beverages during the first 6 months after birth. Today there is a decline in exclusive breastfeeding, and among others, one reason is the increase in the participation of mothers in the workforce, especially in urban areas. Many factors that affect the regularity of exclusive breastfeeding by working mothers, one of which, is the demographic factor. This study aims to obtain profile data of exclusive breastfeeding by working mothers and statistical modelling of exclusive breastfeeding by working mothers based on demographic factor, by conducting a survey on 384 respondents. This research uses descriptive analysis and logistic regression analysis with SPSS software version 15.0. Descriptive analysis showed that most mothers working in Jakarta (61.2%) did not give exclusive breastfeeding. Logistic regression statistical analysis showed that age, occupation, distance to work, and travel time to the workplace of working mothers are dominant factors that influence exclusive breastfeedings, with the p-value is smaller than the p value (Sig) = 0.05.Air Susu Ibu (ASI) eksklusif adalah pemberian ASI kepada bayi tanpa tambahan makanan atau minuman apapun selama 6 bulan pertama kelahiran. Dewasa ini terdapat penurunan jumlah maupun frekuensi pemberian ASI eksklusif, dan salah satu penyebabnya adalah kenaikan tingkat partisipasi para ibu dalam angkatan kerja terutama di perkotaan. Banyak faktor yang mempengaruhi lancarnya pemberian ASI eksklusif oleh ibu bekerja, salah satu diantaranya adalah faktor demografi. Penelitian ini bertujuan untuk mendapatkan data profil pemberian ASI eksklusif oleh ibu bekerja dan pemodelan statistik pemberian ASI eksklusif oleh ibu bekerja berdasarkan faktor demografi, dengan melakukan survei terhadap 384 responden. Penelitian ini menggunakan metode analisa deskriptif dan analisa regresi logistik dengan perangkat lunak SPSS versi 15.0. Hasil analisa deskriptif menunjukkan bahwa sebagian besar ibu bekerja di DKI Jakarta (61,2%) tidak memberikan ASI eksklusif. Hasil analisa regresi logistik menunjukkan bahwa usia ibu bekerja, jenis pekerj aan, jarak ke tempat kerj a, dan waktu perj alanan menuju ke tempat kerj a, merupakan faktor faktor dominan yang mempengaruhi pemberian ASI eksklusif, dengan nilai p penelitian lebih kecil dari nilai p (sig) = 0,05
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