1,720,958 research outputs found
PENGUSIR HAMA BURUNG PEMAKAN PADI OTOMATIS DALAM MENUNJANG STABILITAS PANGAN NASIONAL
Get PDFKetahanan pangan menjadi kebutuhan utama masyarakat Indonesia. Padi sebagai penghasil beras menjadi komoditas penting. Berbagai kendala dalam proses budidaya padi menyebabkan goyahnya hasil produksi menjuru pada ketahanan pangan. Salah satunya ialah sulitnya mengendalikan hama burung pemakan padi. Hama burung merupakan salah satu musuh utama bagi petani. Meningkatnya populasi burung menyebabkan menurunya hasil panen. Burung dapat memakan padi dengan rata-rata 5g sehari. Akibatnya produksi padi dapat mengalami penurunan sebanyak 30-50%. Berbagai cara manual dan tradisional telah dilakukan petani hingga harus terjun langsung untuk mengendalikan serangan tersebut. Tentu ini sangat melelahkan dan merepotkan apabila dilakukan sendiri pada areal sawah yang luas. Salah satu cara menanggulanginya yakni menggunakan alat pengusir hama burung yang bersifat otomatis. Penelitian ini hadir sebagai solusi utama berupa alat pengusir modern berbasis otomatis dengan memanfaatkan sumberdaya hayati bersifat ramah lingkungan. Metode otomatis diperoleh dari memadukan alat dengan mesin penyemprot pengharum ruangan dengan pengamatan berupa pengujian bahan paling efektif dan pengujian interval waktu penyemprotan serta metode wawancara juga pre-test dan post-test kepada masyarakat. Hasil yang diperoleh, ekstrak jengkol menjadi bahan terbaik dengan interval waktu penyemprotan 10 menit yang sangat mampu mengusir hama burung. Cukup banyak masyarakat ataupun petani yang memberi respon baik terhadap penggunaan alat ini, sehingga dapat disimpulkan bahwa alat ini sangat efektif dalam mengusir hama burung. Kata Kunci: Alat Pengusir Otomatis, Hama Burung, Ketahanan Panga
The Identification of Plant Growth Promoting Rhizobacteria from Thorny Bamboo Rhizosphere with 3% KOH Gram Test and Gram Staining Test
No full textPlant Growth Promoting Rhizobacteria (PGPR) is a group of beneficial bacteria that actively colonize the rhizosphere and play an important role in enhancing root growth that impacts on plant growth, yields and land fertility. PGPR is very much found in the area around plant roots or rhizosphere especially thorny bamboo rhizosphere (Bambusa blumeana). The number of microorganisms contained in PGPR spiked bamboo rhizosphere makes it difficult to know what types of bacteria are the most dominant and most active in influencing plant growth. One method that can be used to identify microorganisms is by biochemical testing processes using the 3% gram KOH test method and gram staining test. This study aims to determine the use of the 3% gram KOH test method and gram staining test in identifying Plant Growth Promoting Rhizobacteria bacteria from thorny bamboo rhizosphere (Bambusa blumeana). This test is carried out at the Biofertilizer and Potential Microbial Laboratory, Ministry of Agriculture, Faculty of Agriculture, Hasanuddin University, Makassar and takes place from October to December 2019. The method of carrying out the test includes making the media nutrient agar (NA), pouring media, planting bacteria, identifying bacteria in 2 gram reaction methods, namely the gram reaction test using 3% KOH and using a simple coloring with methylen blue and lugol. The results obtained are the 3% gram KOH test method in testing the scratch method of all samples that have slime while the scatter method has 2 samples that have slime. Then the gram staining test method on staining with methylene blue and logol produces blue for the genus Pseudomonas which means gram positive and pink or purple for the genus Bacillus which means gram positive. So it can be concluded that the 3% KOH test method and gram staining test have optimum effect in detecting microorganisms
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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