1,720,958 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
Growth and Nickel Absorption of Green Mustard (Brassica rapa L.) on Nickel-Contaminated Soil
No full textThe waste generated by the nickel mining business has the potential to reduce soil fertility, causing plants not to grow normally and produce optimally. In fact, due to the high Ni content in the soil, it will be absorbed by the plants so that it cannot be used as food. The study aimed to determine the growth and absorption of nickel in mustard greens by applying compost and liquid fertilizer to nickel-polluted soil. The study used a randomized block design (RAK) with liquid fertilizer (PC) and compost application. The treatment consisted of (1) control (no PC + no compost); (2) Without PC+ compost 15 tonnes/ha; (3) Without PC + compost 20 tonnes/ha; (4) Without PC+25 tons/ ha; (5) PC 10 ml/liter + No compost; (6) PC 10 ml/liter + compost 15 tons/ha; (7) PC 10 ml/liter + compost 20 tons/ha; (8) PC 10 ml/liter + compost 25 tons/ha, which was repeated 3 times and consisted of 3 plants in each treatment. Data were analyzed using ANOVA and further testing with BNJ Test 0.05. The results showed that mustard plants on nickel-contaminated soil could grow normally and without poisoning symptoms. The application of 4 liters/ha of liquid fertilizer and 25 tons/ha of compost produced a higher number of leaves and fresh weight of mustard plants and were significantly different from other treatments. Mustard plants can absorb and accumulate nickel in the roots and leaves in the range of 425-455 mg/kg plant dry weight. Using green mustard plants in remediating land contaminated with heavy metals, especially nickel, can be an alternative by adding compost and liquid fertilizer to increase the biomass of mustard plants. However, it still has to be appropriately monitored, and the plants produced are not recommended for consumption.Limbah yang dihasilkan usaha penambangan nikel berpotensi menurunkan tingkat kesuburan tanah yang menyebabkan tanaman tidak dapat tumbuh normal dan menghasilkan produksi secara optimal. Bahkan, akibat tingginya kandungan Ni dalam tanah akan terserap ke dalam tanaman sehingga tanaman ini tidak dapat digunakan sebagai bahan pangan. Penelitian bertujuan untuk mengetahui pertumbuhan dan penyerapan nikel pada tanaman sawi melalui aplikasi kompos dan pupuk cair pada tanah tercemar nikel. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan perlakuan aplikasi pupuk cair (PC) dan kompos. Perlakuan terdiri atas (1) kontrol (Tanpa PC+Tanpa kompos); (2) Tanpa PC+ kompos 15 ton/ ha; (3) Tanpa PC + kompos 20 ton/ ha; (4) Tanpa PC+25 ton/ ha; (5) PC 10 ml/liter + Tanpa kompos; (6) PC 10 ml/liter + kompos 15 ton/ha; (7) PC 10 ml/liter + kompos 20 ton/ha; (8) PC 10 ml /lter + kompos 25 ton/ha, yang diulang 3 kali dan terdiri atas 3 tanaman pada setiap perlakuan. Data yang diperoleh diolah dengan Anova dan uji lanjut dengan Uji BNJ 0,05. Hasil penelitian menunjukkan bahwa tanaman sawi yang ditanam pada tanah yang tercemar nikel, dapat tumbuh normal dan tanpa gejala keracunan. Pemberian pupuk cair 4 liter/ha dan kompos sebanyak 25 ton/ha menghasilkan jumlah daun dan bobot segar tanaman sawi yang lebih tinggi dan berbeda nyata dengan perlakukan lainnya. Tanaman sawi mampu menyerap dan mengakumulasi nikel pada akar dan daun berada pada kisaran 425-455 mg/kg bobot kering tanaman. Penggunaan tanaman sawi hijau dalam meremediasi lahan terkontaminasi logam berat khususnya nikel dapat menjadi alternatif dengan melakukan penambahan kompos dan pupuk cair untuk meningkatkan biomassa tanaman sawi. Akan tetapi peenelitian harus diawasi dengan baik dan tanaman yang dihasilkan tidak disarankan untuk dikonsumsi, karena mengandung logam berat yang cukup tinggi
Respon Pertumbuhan Bibit Lada (Piper nigrum l.) Terhadap Komposisi Media Tanam dan Konsentrasi Pupuk Organik Cair
No full textAvailability of pepper seeds continuously, good quality, and free from stem rot disease is still limited at the farmer level. This study aims to determine the composition of the planting medium and the best concentration of organic fertilizers in spurring pepper seeds' growth. The study was compiled using a two-factor factorial design based on a randomized block design. The first factor is the media's composition for planting sand, compost, and soil in 5 levels, namely 1:0:1, 1:1:0, 1:1:1, 1:2:1, and 2:1:1. The second factor is applying liquid organic fertilizer (POC), made from forage. It consists of three levels of concentration, namely POC 10 ml, 20 ml, and without POC (control). Fifteen treatment combinations were repeated three times. The results showed that the combination of POC and the composition of the planting medium could stimulate pepper seedlings' growth. POC 20 ml/liter and the composition of the media of sand + compost + soil 1:1:0 and 1:1:1 resulted in the best shoot lengths, namely 13.91 cm and 13.23 cm, respectively. The planting medium of sand + compost + soil with a composition of 1:1:1 was able to spur the emergence time of pepper cuttings faster, namely 19.13 days after planting, and the number of leaves was higher, namely 5.40
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
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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