1,720,963 research outputs found
Response of Total Number of Tillers, Plant Height, and Dry Straw Weight of Jangguik rice Genotypes (Oryza sativa) With Gamma Ray Irradiation Treatment
Full text linkThe limited number of tillers and the height of the plant stem result in a lighter straw weight per clump, which diminishes farmers' interest in cultivating the Jangguik rice genotype. Jangguik rice may face extinction in a few years if this trend continues. This study aimed to determine the response of the total number of tillers, plant height, and dry straw weight of Jangguik rice genotypes to gamma-ray irradiation treatment. Field research was conducted in Koto Kari Village, Kuantan Tengah District, Kuantan Senggigi Regency, located at coordinates 0 0 00-1 0 00 LS 101 0 02 – 101 0 55 BT with a temperature range of 23.0 – 33.0 °C, air humidity of 60 – 98%, and an altitude of 300 meters above sea level. Gamma irradiation services were conducted on Babarsari St. at the Deputy for Research and Innovation Infrastructure, Yogyakarta Radiation Laboratory, Depok Sleman, Yogyakarta. The research was conducted over seven months, from June to December 2024. This experiment employed a one-factor Randomized Block Design (RAK) experimental method. It consisted of three treatments, each repeated five times, resulting in 15 experimental plots. The treatments included doses of 0 Gy, 100 Gy, and 200 Gy. The study's results were statistically analyzed using an ANOVA table; if the calculated F-value exceeded the F-table value at the 5% significance level, further analysis was conducted using the Honest Significant Difference (HSD) test. Based on the research findings, it can be concluded that gamma-ray irradiation treatment significantly affected plant height, which measured 110.66 cm but did not influence the total number of tillers or the dry weight of straw
Improvement of Jangguik Rice Genotype Characters (Oryza sativa L. ) Through Gamma-ray Mutation Induction in the Nursery Phase
Full text linkRice is a widely cultivated and consumed food commodity. In Indonesia, the increasing population growth has led to a rise in both rice consumption and demand. The purpose of this study was to determine the effects of gamma-ray treatment on the properties of Jangguik rice, specifically regarding seed growth duration, seedling height, number of leaves, and seedling weight. The research was conducted in Koto Kari Village, located in the Kuantan Tengah District of Kuantan Senggigi Regency. The Deputy provided gamma irradiation services for Research and Innovation Infrastructure at the Yogyakarta Radiation Laboratory, situated on Jl. Babarsari, Depok, Sleman, Yogyakarta. The research was conducted over two months, from June to July 2024. This experiment employed an experimental method utilizing a Randomized Block Design with one factor. The study consisted of five treatments, each repeated three times, resulting in a total of 15 experimental plots. The treatments tested included doses of 0 Gy, 100 Gy, 200 Gy, 300 Gy, and 400 Gy. The study's results were analyzed statistically using an ANOVA table. If the calculated F-value exceeded the F-value from the table at the 5% significance level, further analysis was conducted using the Honestly Significant Difference (HSD) test at the same significance level. The results of the study indicate that gamma-ray irradiation treatment exerts a multifaceted impact on the growth of Jangguik rice seedlings. The following data were collected for analysis: the parameter of seed growth days (0 Gy treatment: 3.41 days after planting; 300 Gy treatment: 6.06 cm); the number of leaves (200 Gy: 5.46 pieces); and the weight of 100 Gy seedlings (0.146 grams)
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
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
Multiplication of Dendrobium Sp Orchid Somatic Embries Using In-Vitro Concentrations of MgSO4 and Myo-Inositol in Murashige and Skoog Media
Full text linkDendrobium Sp orchid is one type of orchid that occupies the top position in ornamental plants. This study aims to determine the administration of various concentrations of magnesium sulfate (MgSO4) and Myo-inositol to Dendrobium Sp orchid explants on Murashige and Skoog media. The design used in this study was a factorial complete randomized design (CRD) consisting of 2 treatment levels (M= MgSO4 and Y= Myo-inositol) with 3 replications. Namely: M0 (without MgSO4), M1 (MgSO4 350 mg/l ), M2 (MgSO4 370 mg/l), M3 (MgSO4 390 mg/l), and Y0 (Without Myo-inositol), Y1 (Myo-inositol 50 mg/l), Y2 (Myo-inositol 100 mg/l) , Y3 (Myo-inositol 150 mg/l). Based on the results of the study, giving various concentrations of magnesium sulfate (MgSO4) alone had a significant effect on all observed parameters, where the best treatment was found in M3 with an average number of shoots 4.04, shoot height 1.08 cm, number of leaves 7.89 fruit, number of roots 6.64 fruit and root length 1.55 cm in Dendrobium Sp. For the treatment of various Myo-inositol concentrations, a single significant effect on all observed parameters, where the best treatment was found in Y3 with an average number of shoots 4.03, shoot height 1.25 cm, number of leaves 7.81, number of roots 4.96 and root length 1.48 in Dendrobium Sp. In interaction, the administration of MgSO4 and Myo-inisitol had a significant effect on all observation parameters, the best treatment was M3Y3 (390 mg/l MgSO4 and 150 mg/l MS Myo-inisitol) namely the number of shoots 4.33, the height of the shoots 1.68 cm, the number of leaves is 8.89, the number of roots is 7.22 cm and the root length is 2.02 cm.
 
Concentration Test for Ferrous Sulfate (FeSO4) and Thiamin in Murashige and Skoog Medium on The Orchid Sub-Culture Dendrobium SP By In-Vitro
Full text linkThe Dendrobium orchid is one type with special features and many variations. This study aims to determine the administration of various concentrations of ferrous sulfate (FeSO4) and Thiamin to Dendrobium sp orchid explants on Murashige And Skoog media. The design used in this study was a Factorial Completely Randomized Design (CRD) consisting of 2 treatment levels (F = FeSO4 and T = Thiamin) with three replications. Namely: F0 (Without FeSO4), F1 (FeSO4 26.8 mg/l ), F2 (FeSO4 27.8 mg/l), F3 (FeSO4 28.8 mg/l), and T0 (Without Thiamin), T1 (Thiamin 0.1 mg/l), T2 (Thiamin 0.2 mg/l) l), T3 (Thiamin 0.3 mg/l). Based on the study results, by giving various concentrations of ferrous sulfate (FeSO4) had a single effect on the shoots quantity parameters with the best treatment found in treatment with an average shoots quantity (.03 ea), F3 for shoot height parameters (1.37 cm), for the total leaves (6.14), for the roots quantity (5.17), and root length were found in treatment with an average of 1.29 cm on the Dendrobium sp. Orchid explants. For the treatment of various concentrations of Thiamin, the single effect on the number of shoots with the best treatment was found at an average (3.44 ea), for the shoot height parameter (0.98 cm), and for the leaves quantity (6.14 ea), for the root length parameter (1.28 cm). The interaction significantly affected the observed parameters, namely the number of shoots with treatment (giving FeSO4 28.8 mg/l and Thiamin 0.3 mg/l) with an average shoot quantity of 1.71 (ea)
- …
