PRODUKTIVITAS PENULIS ARTIKEL ILMIAH BIDANG ILMU INFORMASI DAN PERPUSTAKAAN PADA JURNAL TERAKREDITASI PERINGKAT SINTA 2, 3 DAN 4 TAHUN 2015-2019

There are 15 scientific journals in the field of Library and Information Science (LIS) accredited and indexed by Science and Technology Index (SINTA). The journals are divided by rating namely SINTA 2 (4 journals), SINTA 3 (4 journals) and SINTA 4 (7 journals). This study aims to determine the productivity pattern of authors in the field of LIS in 2015 - 2019 indexed in SINTA 2, 3 and 4 based on Lotka's rules. The research approach is quantitative with bibliometric analysis. The results show that based on: (1) article published during 2015 – 2019, there were 1,806 authors with a frequency of article writing 1,061; (2) the calculation of the author's productivity pattern, shows the value of n = 0.93062 and the value of C = 0.74864; and (3) the K-S test results show that the Dmax value was greater than the critical value for SINTA 2 and 4, while for the SINTA 3 the Dmax value was smaller (0.0172) than the critical value (0.108).

Strain Improvement and Strain Maintenance Revisited. The Use of Actinoplanes teichomyceticus ATCC 31121 Protoplasts in the Identification of Candidates for Enhanced Teicoplanin Production

Multicellular cooperation in actinomycetes is a division of labor-based beneficial trait where phenotypically specialized clonal subpopulations, or genetically distinct lineages, perform complementary tasks. The division of labor improves the access to nutrients and optimizes reproductive and vegetative tasks while reducing the costly production of secondary metabolites and/or of secreted enzymes. In this study, we took advantage of the possibility to isolate genetically distinct lineages deriving from the division of labor, for the isolation of heterogeneous teicoplanin producer phenotypes from Actinoplanes teichomyceticus ATCC 31121. In order to efficiently separate phenotypes and associated genomes, we produced and regenerated protoplasts. This approach turned out to be a rapid and effective strain improvement method, as it allowed the identification of those phenotypes in the population that produced higher teicoplanin amounts. Interestingly, a heterogeneous teicoplanin complex productivity pattern was also identified among the clones. This study suggests that strain improvement and strain maintenance should be integrated with the use of protoplasts as a strategy to unravel the hidden industrial potential of vegetative mycelium.

Author productivity pattern and applicability of Lotka’s inverse square law: a bibliometric appraisal of selected LIS open access journals

Purpose The purpose of this paper is to know whether the authors’ productivity pattern of library and information science (LIS) open access journals adheres to Lotka’s inverse square law of scientific productivity. Since the law was introduced, it has been tested in various fields of knowledge, and results have varied. This study has closely followed Lotka’s inverse square law in the field of LIS open access journals to find a factual result and set a baseline for future studies on author productivity of LIS open access journals. Design/methodology/approach The publication data of selected ten LIS open access journals pertain to authorship, citations were downloaded from the Scopus database and analysed using bibliometric indicators like authorship pattern, collaborative index (CI), degree of collaboration (DC), collaborative coefficient (CC) and citation counts. This study has applied Lotka’s inverse square law to assess authors’ productivity pattern of LIS open access journals and further Kolmogorov-Smirnov (K-S) goodness-of-fit test applied for testing of observed and expected author productivity data. Findings Inferences were drawn for the set objectives on authorship pattern, collaboration trend and authors’ productivity pattern of LIS open access journals covered in this study. The single authorship pattern is dominant in LIS open access journals covered in this study. The CI, DC and CC are found to be 1.95, 0.47 and 0.29, respectively. The expected values as per Lotka’s law (n = −2) significantly vary from the observed values as per the chi-square test and K-S goodness-of-fit test. Hence, this study does not adhere to Lotka’s inverse square law of scientific productivity. Practical implications Researchers may find an idea about the authors’ productivity patterns of LIS open access journals. This study has used the K-S goodness-of-fit test and the chi-square test to validate the authors’ productivity data. The inferences found out from this study will be a baseline for future research on author productivity of LIS open access journals. Originality/value This study is significant from the viewpoint of the growing research on open access journals in the field of LIS and to identify the authorship pattern, collaboration trend and author productivity pattern of such journals.

Pemodelan Pola Produktivitas Cabai Rawit di Kabupaten Magelang

The objective of this study was to determine the best model that describe the pattern of cayenne pepper productivity in Magelang Regency. This study uses primary data which was obtained from the results of a survey of cayenne pepper production by the General Director of Horticulture on several sample plots in Magelang District, Central Java Province in 2018. The process of data analysis was divided into two parts: grouping the sample plots based on the similarity in productivity pattern and then fitting models in each group. The models used to fit data were Logistic Growth Model, Monomolecular Growth Model, Exponential Growth Model, Polynomial Model and Linear B-Spline Model. The best model was determined based on R2 and MAPE. The results showed that the pattern of cayenne pepper productivity in Magelang District had eight different characteristics. Characteristics of each groups were illustrated by the similarity of their productivity pattern. The best model in each group was B-Spline Linear Model.

Pemodelan Pola Produktivitas Cabai Rawit di Kabupaten Magelang

The objective of this study was to determine the best model that describe the pattern of cayenne pepper productivity in Magelang Regency. This study uses primary data which was obtained from the results of a survey of cayenne pepper production by the General Director of Horticulture on several sample plots in Magelang District, Central Java Province in 2018. The process of data analysis was divided into two parts: grouping the sample plots based on the similarity in productivity pattern and then fitting models in each group. The models used to fit data were Logistic Growth Model, Monomolecular Growth Model, Exponential Growth Model, Polynomial Model and Linear B-Spline Model. The best model was determined based on R2 and MAPE. The results showed that the pattern of cayenne pepper productivity in Magelang District had eight different characteristics. Characteristics of each groups were illustrated by the similarity of their productivity pattern. The best model in each group was B-Spline Linear Model.

Produktivitas Pengarang Menggunakan Hukum Lotka Dengan Teknik Complete Count Pada Jurnal Kedokteran YARSI Tahun 2009-2018

Researchers research to develop science. Research results are published as a form of scientific communication. One type of scientific publication is a journal article. YARSI Medical Journal is a peer-reviewed journal in the field of medicine and health that is open to the public owned by YARSI University. The author's productivity patterns in the YARSI Medical Journal so far are unknown. Author productivity is the number of papers produced by the author on a particular subject and published in scientific journals in a certain period. This study aims to (1) Determine the author's productivity patterns using Lotka's Law with complete count techniques in YARSI Medical Journal 2009-2018; (2) Testing the suitability of the frequency of Lotka's Law with the author's frequency distribution using the complete count technique in YARSI Medical Journal 2009-2018. The research method used in this study is a quantitative method with bibliometric analysis. Data collection uses documentation method. The results of this study include (1) the pattern of author productivity with an exponent value (n) 2.874110535 and the constant (C) 0.820080499 meaning that the author contributing to one article is 82.00% of the total number of authors, it can be said that the YARSI Medical Journal Author Productivity Pattern 2009- 2018 is low or less productive. (2) Based on the K-S test the maximum deviation is 0 and the critical value is 0.0829206. Dmax is smaller than the critical value, so H0 is accepted. That is, the Author Productivity Pattern uses the Complete Count Technique in YARSI Medical Journal 2009-2018 following Lotka's Law.

Produktivitas pengarang dan pertumbuhan artikel bidang arkeologi dalam Jurnal Kapata Arkeologi tahun 2005-2017

Introduction. The productivity of scientific journals in Indonesia is still relatively low compared to other ASEAN countries. This study aims to determine author's productivity patterns as well as the growth trend of archaeological articles in the journal of Kapata Arkeologi published by Balai Arkeologi Maluku within the range from 2005 to 2017. Data Collection Method. The method used in this research was descriptive quantitative, to examine the author's contribution in generating field of Archeology, understand the pattern of author's productivity by testing against the enactment of Lotka's Law and provide an overview of patterns of development publications by Kapata Archeologi.Analysis Data. The author's productivity analysis used Lotka's Law and statistical testing by Kolmogrov-Seminorv.Results and Discussions. The productivity pattern showed that authors published one article was 32.58%, 2 articles were 17.44% - meaning that more than a quarter of the author produced 1 article. The author who contributed most in Kapata Arkeologi was Wuri Handoko who has published 29 articles. Among other sub fields, Archaeological History articles are the most widely published article with a total of 76 articles.Conclusions. The productivity level of Kapata Archeology journal authors is very high. Further bibliometric analysis related to the collaboration of authors is needed.

PRODUCTIVITY, NATIONALIZATION, AND THE ROLE OF “NEWS”: LESSONS FROM THE 1970S

Occurrences of an old phenomenon, the expropriation of foreign-owned property, peaked in the 1970s when virtually every significant oil-producing developing country nationalized its oil. Nationalization was again on the rise in the 2000s. Using novel data, this paper quantitatively evaluates the effects of nationalization. First, the paper finds significant productivity losses associated with nationalization in a sample of oil-producing countries. Venezuela in particular experienced a striking decline in productivity. Second, the paper presents a new channel through which nationalization affects productivity: a long-term pre-announcement can shift the composition of the workforce with a huge decline in highly skilled foreign workers and result in higher extraction and lower exploration. Guided by a quantitative dynamic partial equilibrium framework disciplined by features of the Venezuelan data, this paper then evaluates the effects of nationalization. A comparison of the simulated and time series data shows that the model can explain about 80% of the productivity pattern over 1961–1980 in the Venezuelan oil industry. Counterfactual experiments suggest that the shift in the composition of the workforce is important in accounting for the productivity pattern. Furthermore, if nationalization had been sudden, long-run losses would have been lower.

TEKNOLOGI BUDIDAYA KEDELAI DENGAN PENDEKATAN PENGELOLAAN TANAMAN TERPADU (PTT) DI KAB KULON PROGO D.I. YOGYAKARTA

<p><em>Kulon Progo Regency is one producer of soybeans in D.I. Yogyakarta. The research aims to find out the result of soybean and farmers perception on soybean production technologies with an approach of integrated crop management (ICM) in Kulon Progo. The research was conducted in April-November 2013. 10 soybean varieties were planted to determine the level of productivity. Pattern and timing of planting explored through interviews with farmers and field inspections. Interviews were conducted with farmers to determine the perceptions of soybean production technology with the approach of integrated crop management (ICM) and in particular soybean varieties. The data were analyzed descriptively. The results showed in Kulon Progo Regency soybeans planted in irrigated land, rainfed lowland and upland, adjust the availability of water. The results showed in Kulon Progo Regency soybeans planted in irrigated land, rainfed lowland and upland, adjust the availability of water. Soybean production technology is not implemented by farmers as a whole, depends on the conditions of agro-ecosystems and agricultural inputs. In general, farmers agree with soybean production technology components with the approach of integrated crop management (ICM). Some farmers do not agree with the manufacture of drainage, mulching straw and harvest when 95% of the leaves have yellowed. Varieties Detam-2, Ijen and Tanggamus more adaptive and give higher yields. However, soybean farmers in Kulon Progo Regency prefer largely seeded soybean as Argomulyo and Burangrang. Gema varieties favored for short-lived.</em></p>