1,720,958 research outputs found
Peningkatan Daya Dukung Timbunan Tanah Lempung Menggunakan Serat Karung Plastik Dan Arang Kayu
No full textTanah lempung merupakan salah satu jenis material tanah yang ada di dunia. Tanah ini juga memiliki karakteristik mudah mengembang apabila diberi air dan menyusut apabila kekurangan air. Tidak semua tanah mempunyai sifat dan daya dukung tanah yang baik. Di Kota Langsa mempunyai tanah yang bersifat tanah lempung contohnya di desa kemuning. Untuk mengurangi bertambahnya volume sampah, ini perlu dipikirkan suatu cara bagaimana pengolahan sampah plastik, dengan cara pemanfaatan karung plastik sebagai perkuatan tanah. Abu arang kayu dapat memperbaiki sirkulasi air dan udara, serta dapat mengikat karbon, dan juga dapat mengurangi kembang susut pada tanah, karena mempunyai sifat mereduksi indeks plastisitas tanah. Penelitian ini bertujuan untuk mendapatkan seberapa besar pengaruh penambahan serat karung plastik dan arang kayu pada timbunan tanah lempung terhadap nilai keruntuhan kuat geser tanah dengan pengujian Triaxial UU, maka dari hasil penelitian tersebut berdasarkan klasifikasi tanah pada Tanah lempung persen lolos saringan No.200 sebesar 31,86% dengan nilai kadar air sebesar 2,65%, Presentase campuran terbaik terdapat pada variasi SKP 3% dan AK 10%, yang memiliki sifat fisik meliputi batas cair (LL) sebesar 41,46%, batas plastis (PL) sebesar 22.92% dan indeks plastisitas (PI) sebesar 17,92%. Dalam penelitian ini menggunakan metode USCS (Unified Soil Classification System)
Analisis Sistem Jaringan Drainase di Kecamatan Langsa Barat, Kota Langsa
Full text linkKecamatan Langsa Barat merupakan kawasan yang sering terjadi banjir genangan, pada musim penghujan. Hal ini disebabkan karena kondisi drainase eksisting tidak dapat menampung limpasan air hujan. Maka penelitian ini bertujuan untuk mengetahui arah aliran drainase, tinggi muka air banjir dan mengetahui kondisi eksisting jaringan drainase. Pada penelitian ini metode yang digunakan adalah deskriptif evaluatif, pembobotan dan cluster random sampling. Hasil identifikasi menunjukan kondisi pola aliran lahan sudah sesuai dengan elevasi. Secara pola jaringan drainase, kawasan penelitian berbentuk grid iron. Tinggi muka air banjir tertinggi berada pada Desa Paya Bujok Teungoh dengan tinggi 50 cm dan tinggi muka air banjir terendah berada pada Desa Matang Seulimeng dengan tinggi 17 cm. Kondisi eksisting drainase wilayah penelitian, berdasarkan survey lapangan dan berdasarkan hasil penilaian kuesioner memiliki nilai yang baik atau layak. Akan tetapi, masih saja mengalami genangan yang di akibatkan oleh sedimentasi dan sampah yang relatif besar serta tidak memadainya pemeliharaan drainase di wilayah penelitian.Kecamatan Langsa Barat merupakan kawasan yang sering terjadi banjir genangan, pada musim penghujan. Hal ini disebabkan karena kondisi drainase eksisting tidak dapat menampung limpasan air hujan. Maka penelitian ini bertujuan untuk mengetahui arah aliran drainase, tinggi muka air banjir dan mengetahui kondisi eksisting jaringan drainase. Pada penelitian ini metode yang digunakan adalah deskriptif evaluatif, pembobotan dan cluster random sampling. Hasil identifikasi menunjukan kondisi pola aliran lahan sudah sesuai dengan elevasi. Secara pola jaringan drainase, kawasan penelitian berbentuk grid iron. Tinggi muka air banjir tertinggi berada pada Desa Paya Bujok Teungoh dengan tinggi 50 cm dan tinggi muka air banjir terendah berada pada Desa Matang Seulimeng dengan tinggi 17 cm. Kondisi eksisting drainase wilayah penelitian, berdasarkan survey lapangan dan berdasarkan hasil penilaian kuesioner memiliki nilai yang baik/layak. Akan tetapi, masih saja mengalami genangan yang di akibatkan oleh sedimentasi dan sampah yang relatif besar serta tidak memadainya pemeliharaan drainase di wilayah penelitian
Analisis Sistem Jaringan Drainase di Kecamatan Langsa Barat, Kota Langsa
Full text linkKecamatan Langsa Barat merupakan kawasan yang sering terjadi banjir genangan, pada musim penghujan. Hal ini disebabkan karena kondisi drainase eksisting tidak dapat menampung limpasan air hujan. Maka penelitian ini bertujuan untuk mengetahui arah aliran drainase, tinggi muka air banjir dan mengetahui kondisi eksisting jaringan drainase. Pada penelitian ini metode yang digunakan adalah deskriptif evaluatif, pembobotan dan cluster random sampling. Hasil identifikasi menunjukan kondisi pola aliran lahan sudah sesuai dengan elevasi. Secara pola jaringan drainase, kawasan penelitian berbentuk grid iron. Tinggi muka air banjir tertinggi berada pada Desa Paya Bujok Teungoh dengan tinggi 50 cm dan tinggi muka air banjir terendah berada pada Desa Matang Seulimeng dengan tinggi 17 cm. Kondisi eksisting drainase wilayah penelitian, berdasarkan survey lapangan dan berdasarkan hasil penilaian kuesioner memiliki nilai yang baik atau layak. Akan tetapi, masih saja mengalami genangan yang di akibatkan oleh sedimentasi dan sampah yang relatif besar serta tidak memadainya pemeliharaan drainase di wilayah penelitian.Kecamatan Langsa Barat merupakan kawasan yang sering terjadi banjir genangan, pada musim penghujan. Hal ini disebabkan karena kondisi drainase eksisting tidak dapat menampung limpasan air hujan. Maka penelitian ini bertujuan untuk mengetahui arah aliran drainase, tinggi muka air banjir dan mengetahui kondisi eksisting jaringan drainase. Pada penelitian ini metode yang digunakan adalah deskriptif evaluatif, pembobotan dan cluster random sampling. Hasil identifikasi menunjukan kondisi pola aliran lahan sudah sesuai dengan elevasi. Secara pola jaringan drainase, kawasan penelitian berbentuk grid iron. Tinggi muka air banjir tertinggi berada pada Desa Paya Bujok Teungoh dengan tinggi 50 cm dan tinggi muka air banjir terendah berada pada Desa Matang Seulimeng dengan tinggi 17 cm. Kondisi eksisting drainase wilayah penelitian, berdasarkan survey lapangan dan berdasarkan hasil penilaian kuesioner memiliki nilai yang baik/layak. Akan tetapi, masih saja mengalami genangan yang di akibatkan oleh sedimentasi dan sampah yang relatif besar serta tidak memadainya pemeliharaan drainase di wilayah penelitian
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
POLA AGIHAN HUJAN DAN PENGARUHNYA TERHADAP BANJIR RANCANGAN
No full textVarious models of the rainfall distribution to distribute a quantity of the
design rainfall during this a lot offered but the rainfall pattern analysis is done
separately between rainfall patterns and rainfall duration. Usually the rainfall
duration is determined without regard to the rainfall depth . While the rainfall
duration and the rainfall depth have a relationship. It is necessary to study the
influence in determining the rainfall pattern compared with no separation
between rainfall duration and rainfall patterns for design floods at each river
basin.
By using statistical analysis from rainfall events data, the frequency of
dominant rainfall events (rainfall depth and rainfall duration) that were analyzed
can be determined without separation. Analyses were performed with the help of
views WRPLOT software. The rainfall duration and the rainfall patterns that
represent das obtained based on the frequency of dominant rainfall events. The
design flood discharge is analyzed based on the rainfall pattern with the model of
rainfall flow transformation using unit hydrograph method.
Of the five river basin studied, the rainfall duration of each river basin is 5
hours for Bogowonto river basin, 4 hours for Progo river basin, 3 hours for Bedog
river basin, Code river basin and Gajahwong river basin. The resulting rainfall
pattern is the rainfall pattern based on the average dominant rainfall duration and
the rainfall pattern based on the overall rainfall duration. Generally, the
application of both the rainfall pattern of the design flood hidrograf gave no
significant difference so that the determination of rainfall pattern for river basin
can use the rainfall pattern based on the average dominant rainfall duration
because it's easier and faster
Mapping the land movement level of Langsa Baro district using the Geographic Information System (GIS)
No full textLangsa Baro District is an area that often experiences floods and a lot of uneven elevation in the area so that land movement can be possible. This study aims to analyze the parameters that affect soil movement and make a zoning map of the level of vulnerability of land movement using spatial data in Langsa Baro District. Data processing with GIS (Geographic Information System) is intended to obtain soil movement mapping. To help determine the weight score on each parameter, this study used the AHP (Analytic Hierarchy Process) method. Factors that greatly influence the occurrence of soil movement that occurs in Langsa Baro District are soil type and rainfall. The Langsa Baro District area has five levels of vulnerability, namely the level of vulnerability of very low soil movement with a percentage of 0.26% and area of 17.02 Ha, the level of vulnerability of low soil movement with a percentage of 3.58% and an area of 234.02 Ha, the level of vulnerability of medium soil movement with a percentage of 18.42% and an area of 1204.22 Ha, the level of vulnerability of high soil movement with a percentage of 73.74% and an area of 4819.54, the level of vulnerability of soil movement is very high with a percentage of 4.00% and an area of 261.26 Ha
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
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