1,720,959 research outputs found
PENDUGAAN ALIRAN SUNGAI BAWAH TANAH DI DESA HARGOSARI GUNUNGKIDUL YOGYAKARTA MENGGUNAKAN METODE VERY LOW FREQUENCY-ELECTROMAGNETIC (VLF-EM) DENGAN FILTER NOISE ASSISTED- MULTIVARIATE EMPIRICAL MODE DECOMPOSITION (NA-MEMD)
Get PDFAbstrakAir di kawasan karst mengalir melalui sistem retakan celah gua. Air bawah permukaan akan terakumulasi dan mengalir dalam suatu pola aliran tertentu melalui lorong-lorong gua yang pada akhirnya membentuk sungai bawah tanah. Sungai bawah tanah daerah karst terkadang dapat berada sejajar horizontal namun alirannya berlawanan, bahkan dapat juga saling menyilang bertingkat tidak saling berhubungan. Salah satu daerah yang memiliki kondisi seperti itu adalah desa Hargosari, kabupaten Gunungkidul, Yogyakarta. Sebenarnya di daerah tersebut banyak terdapat air sungai bawah tanah sekalipun di musim kemarau, namun posisi serta kedalamannya belum diketahui, sehingga dilakukan penelitian dengan metode geofisika yaitu metode Elektromagnetik Very Low Frequency untuk mengestimasi keberadaan dan kedalaman sungai bawah tanah tersebut. Data lapangan yang didapatkan dari hasil pengukuran metode VLF-EM biasanya tercampur dengan noise dan outlier, untuk itu digunakan filter NA-MEMD (Noise Assisted-Multivariate Empirical Mode Decomposition) yang mampu mereduksi noise dan outlier dari data pengukuran, dan juga menggunakan filter Moving Average, dan filter Karous H-jelt untuk menghasilkan kontur rapat arus ekivalen sehingga posisi sungai bawah tanah dapat diketahui.Hasil interpretasi rapat arus ekivalen menunjukan arah sungai bawah tanah di desa Hargosari ke arah barat mengikuti aliran sebelumnya, dengan kedalaman sungai bawah tanah terlihat pada lintasan 1 berada pada kedalaman 125 m, pada lintasan 2 sungai berada pada kedalaman 120 m, lintasan 3 sungai berada pada kedalaman 112 m, lintasan 4 berada pada kedalaman 105 m, dan untuk lintasan terakhir yaitu lintasan 5 berada pada kedalaman 95 m. Untuk sungai 2, baru terlihat pada lintasan 2 pada kedalaman 115 m, lintasan ke tiga pada kedalaman 110 m, lintasan ke empat pada ke dalaman 100 m, dan untuk lintasan kelima pada kedalaman 80 m. Berdasarkan hasil penelitian ini, arah aliran sungai bawah tanah di desa Hargosari mengarah ke Barat.Kata Kunci : Sungai bawah tanah, VLF, filter NA-MEMD, filter Karous HJelt, rapat arus ekivalen.Â
ANALISIS PENGGUNAAN APLIKASI FUZZY ANALYTICAL HIERARCHY PROCESS DALAM SELEKSI KARYAWAN
Get PDFThis study discusses the problem of decision making to choose the best employee alternatives. To solve this problem Fuzzy Analytical Hierarchy Process is used, the development of conventional Analytical Hierarchy Process which is designed to deal with problems with more subjective criteria. The choice of the best employees with the Fuzzy Analytical Hierarchy Process shows that the subjectivity of the criteria is of greater concern compared to using the conventional Analytical Hierarchy Process
PENERAPAN ERGONOMI K3 DALAM PROSES PENGELASAN
Get PDFThe process of electric welding is a welding process using webbed electrodes as an added source of heat from current power. From the ergonomic aspect that needs to be improved is the light intensity and airflow in the workplace. The purpose of this study was to determine the decrease in workload, musculoskeletal complaints and increase work productivity in students.
This research was conducted with a total sample of 5 people, the experimental research method used the same subject design (treatment by subjects design). This research activity aims to increase the knowledge and skills of welders in welding activities based on welding safety and health standards (WSH)
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
Design and Build Transport Manual Material Handling (MMH) Trolley Based on Ergonomic
Get PDFThis study aims to design and build a Transport Manual Material Handling (MMH) Trolley based on ergonomics by recruiting 100 students (45 female participants and 55 male participants) randomly from the Faculty of Engineering, Universitas Pahlawan Tuanku Tambusai. Anthropometric data measured in the form of Standing Elbow Height (TSB), Sitting Hand Reach (JTD), Hand Width to Metacarpal (LTM), Shoulder Width (LB), the data in the normality test can be seen that the chi-square count < chi table, the data above is normally distributed, the uniformity test states that from the 4 anthropometric data are uniform, and finally the adequacy test states that the data is normal (N'<N). The results of the test and the calculation of percentiles were obtained in the "Trolley design based on anthropometry data in the form of TSB (P90: 115.08 cm), JTD (P50: 69.85 cm), LB, (P95: 10.32 cm), and LB (P95: 49.93 cm). ). As for the test results, the trolley product can carry a load of 50 kg - 200 kg which has been tested in 3 stages in the form of a medium load (50 kg), medium load (100 kg), and heavy load (150-200 kg). Therefore, for the design of this trolley, an ergonomic size has been determined so that it can be used practically, safely, and comfortably and in addition to transporting materials it can be used as a means of transportation
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
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