1,720,987 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
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
Analisis Risiko Kesehatan Pajanan Inhalasi Debu Particulate Matter 2.5 pada Siswa Sekolah Menengah Pertama di Kota Depok Tahun 2018
Full text linkParticulate Matter2.5 is becoming international concern due to its unique nature. With a size less than 25 microns, these pollutants can penetrate deep to the alveoli. Consisting of a variety of materials and capable of plastering by toxic chemical pollutants, the toxicity of PM2.5 cannot yet be determined with certainty. One of the important sources of PM2.5 is the road traffic. Populations close to the source of exposure will have potential hazards, one place with a densely populated such as school. Schools close to the highway may be the site of exposure to students with PM2.5. Students are vulnerable group that inhale more concentrations of pollutants than adults, a risk analysis of PM2 exposure to school students is required. The daily intake of PM2.5 students is in the range of 7.30 × 10-5-14.4 × 10-4 mg / kg / day, the calculation of non carcinogenic risk is 0.02-0.36, this range is below the value of 1 so it can be that the hazards are not considered a threat to public health
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
Hubungan Konsentrasi Formaldehid Dalam Ruang dengan Gangguan Fungsi Paru Obstruktif pada Siswa Sekolah Menengah Pertama di Depok
No full textLatar Belakang. Salah satu polutan indoor yang menjadi masalah kesehatan masyarakat adalah formaldehid. Pemajanan formaldehid dalam ruang dapat menyebabkan gangguan fungsi paru. Anak-anak dan remaja menghabiskan sebagian besar waktunya di lingkungan indoor terutama di sekolah. Tujuan dari penelitian ini adalah mengetahui hubungan antara konsentrasi formaldehid dalam ruang dengan gangguan fungsi paru obstruktif pada siswa Sekolah Menengah Pertama di Depok. Metode. Studi cross-sectional dilakukan di tiga SMP Depok. Sampel penelitian adalah 150 siswa yang diambil dengan multistage sampling. Pengukuran konsentrasi formaldehid menggunakan FormaldemeterTM htv dan kondisi fungsi paru diperoleh melalui pemeriksaan dengan spirometer. Hasil. Hasil penelitian menunjukkan bahwa nilai rata-rata konsentrasi formaldehid adalah 0,038 ppm dan fungsi paru (FEV1/FVC) siswa SMP di Depok yaitu 94,31%. Tidak ditemukan hubungan yang signifikan antara konsentrasi formaldehid dalam ruang dengan gangguan fungsi paru obstruktif. Tidak ada hubungan yang signifikan antara faktor risiko lain (status gizi, aktivitas fisik, perilaku merokok, perokok dalam rumah, dan penggunaan obat nyamuk) dengan gangguan fungsi paru obstruktif. Siswa dengan aktivitas fisik yang rendah berisi-ko 1,253 kali mengalami gangguan fungsi paru obstruktif dibandingkan siswa yang aktivitas fisiknya cukup (CI: 0,203-7,725). Siswa yang menggunakan obat nyamuk berisiko 1,898 kali mengalami gangguan fungsi paru obstruktif dibandingkan dengan siswa yang tidak menggunakan obat nyamuk (CI: 0,308-11,705). Simpulan. Konsentrasi formaldehid pada SMP di Depok masih berada di bawah Nilai Ambang Batas. Perlu dilakukan penelitian lanjutan dengan gejala kesehatan lain yang disebabkan oleh pajanan formaldehid dan uji fungsi paru jenis lainnya.Kata Kunci: formaldehid, gangguan paru obstruktif, kualitas udara sekola
Hubungan Konsentrasi Formaldehid dalam Ruang dengan Gangguan Fungsi Paru Obstruktif pada Siswa Sekolah Menangah Pertama di Depok
Full text linkOne of indoor pollutants that is a public health problem is formaldehyde. Formaldehyde exposure may cause lung function impairment. Children and adolescents spend most of their time in indoor environments, especially in schools. The objective of this research is to examine the association between indoor formaldehyde concentrations with obstructive pulmonary function impairment among Junior High School students in Depok. Cross-sectional studies were conducted at three SMP in Depok. Measurement of formaldehyde concentrations using direct reading FormaldemeterTM htv and condition of lung function obtained through inspection with spirometer. Sample of research is 150 students taken with multistage sampling. The results showed that mean value of formaldehyde concentration is 0,038 ppm and mean lung function (FEV1 / FVC) of Junior High School students in Depok was 94,31%. There was no significant association between indoor formaldehyde concentrations with obstructive pulmonary function impairment. There was no significant association between other risk factors (nutritional status, physical activity, smoking behavior, smokers in the house and the use of mosquito repellent) with obstructive pulmonary function impairment. Students with low physical activity at risk 1,253 times higher to experience obstructive pulmonary function impairment than students with moderate physical activity (CI: 0.203-7.725). Students using mosquito repellent at risk 1,898 times higher than did not use mosquito repellent (CI: 0,308-11,705). The concentration of formaldehyde at SMP in Depok remained below the Threshold Value. It is strongly recommended to do further research with other health symptoms caused by formaldehyde exposure and other types of lung function
Analisis Risiko Kesehatan Pajanan Inhalasi Debu Particulate Matter 2.5 pada Siswa Sekolah Menengah Pertama di Kota Depok Tahun 2018
Full text linkParticulate Matter2.5 merupakan polutan yang menjadi perhatian karena sifatnya yang unik. Dengan ukuran kurang dari 25 mikron, polutan ini dapat masuk hingga alveoli. Terdiri dari berbagai bahan dan mampu ditempeli oleh polutan kimia toksik, toksisitas PM2.5 belum dapat ditentukan secara pasti. Salah satu sumber PM2.5 yang penting yaitu jalan raya. Populasi yang dekat dengan sumber pajanan akan memiliki potensi bahaya, salah satu tempat dengan populasi yang padat yaitu sekolah. Sekolah yang dekat dengan jalan raya dapat menjadi tempat terpajannya siswa dengan PM2.5. Siswa merupakan kelompok rentan yang menghirup lebih banyak konsentrasi polutan dibandingkan dengan orang dewasa, diperlukan suatu analisis risiko kesehatan pajanan PM2.5 pada siswa sekolah. Asupan harian PM2.5 siswa berada pada rentang 7.30×10-5-14.4×10-4 mg/kg/hari, perhitungan risiko non karsinogenik bernilai dari 0.02-0.36 rentang ini berada dibawah nilai 1 sehingga dapat dikatakan aman.Kata Kunci: Analisis Risiko Kesehatan Lingkungan, Particulate Matter 2.5, Sekolah Seha
NITRATE EXPOSURE IN DRINKING WATER AND CANCER RISK: LITERATURE REVIEW
No full textBackground:
Nitrate is a contaminant in water sources and it can be found in surface water and groundwater. Nitrate enter the body through consumption of water and food that contain nitrate. Nitrate may cause cancer, because there are still few studies that report the relationship between nitrate and the risk of cancer. This study aims to review the relationship between the nitrate exposure and risk of various types of cancer based on the results of previous studies.
Subject and Method: the method is literature review with a database of PUB MED and SCOPUS, using a systematic search strategy and in accordance with the criteria determined at the start of the study. The article used is a research article with information related to nitrate exposure from drinking water sources and its health effects, namely cancer, published in 2010-2020.
Results: A total of 96 literatures are searched from database, 9 studies that met the inclusion criteria were selected for analysis. The selected studies used case control study design (3 articles) and cohort (6 articles).
Conclusion: Most studies report that there are positive association between nitrate consumption in drinking water and the risk of developing colorectal, bladder, kidney, gastrointestinal, ovarian and thyroid cancer
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
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