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PERILAKU LENTUR BALOK CASTELLATED MODIFIKASI DENGAN PENYAMBUNG PROFIL SIKU DAN PERKUATAN TULANGAN KOMPOSIT MORTAR
No full textBeam is a structure that has a bending moment whose strength is influenced by the moment of inertia of the beam. Therefore, to increase the moment of inertia without having to increase the size of the profile can be done by modifying the W-Shapes. Because most of the bending moment acting on W-Shapes has been endured by the wings, then the reduction in area of the body to a certain extent will not lower the flexural capacity of the W-Shapes. Modified form W-Shapes into castellated steel beams have different shapes hole openings variations, ranging from hexagonal, square, circle or combination of all three. Can also be modified to increase the flexural steel reinforcement and stiffness by using angles shapes and combined with using composite mortar. This study aims to conduct a study on the behavior of the flexural capacity then be compared with previous studies.
The object of research is the junction modifications castellated beam connective with angles shapes diagonally after reinforced with bars D16 and mortar containing added ingredients such as Viscocrete-10. Beam used has a height of 300 mm, width 75 mm and length of span 3000 mm. The method of testing is done by using two point static loaded vertically with a review of the bending behavior.
From the test results and theoretical calculations can be drawn several conclusions , among others : the bending capacity of castellated beams generated by modification with junction angles and reinforcement mortar composites based on a combination of test results is equal to 250.3 KN with an average increase of 38.76 % from previous studies. Deflection values due to the gradual imposition of castellated beams modified composite with a reinforcement decreased when compared with the composite castellated beams from previous studies with the maximum deflection value composite castellated beam modification of 30.07 mm. The resulting deflection values indicate that the modification of composite castellated beams with reinforcement having a higher level of service life than previous research . Efficient use of modified composite castellated beams with reinforcement compared with previous studies in terms of the moment capacity increased torque capacity by 2.1 % , in terms of heavy weight also decreased by 52 % and in terms of production budget price decreased by 32.46 %
Analisis Gerusan Lokal dengan Metode Colorado State University (CSU) Dan Metode Froehlich
Full text linkABSTRAKJembatan Alue Buloh yang melintasi Sungai Krueng Seunagan adalah satu akses penghubung yang membatasi Desa Alue Buloh dan Desa Latong dan berada di Kecamatan Seunagan Kabupaten Nagan Raya. Jembatan ini telah mengalami penurunan sebesar 80cm akibat bangunan bawah dari jembatan telah menyebabkan perubahan morfologi sungai Alue Buloh dimana dasar sungai yang mengalami pendangkalan oleh sedimentasi dan erosi tebing mengakibatkan sungai semakin melebar. Berdasarkan kondisi permasalahan di atas diperlukan kajian dan identifikasi terhadap jembatan yang berada di lokasi studi, dengan tujuan untuk memperoleh besarnya kedalaman gerusan yang terjadi akibat bangunan bawah jembatan yaitu pilar. Analisis kedalaman gerusan dilakukan menggunakan metode Colorado State University (CSU) dan metode Froehlich. Dengan nilai kedalaman maksimum 2.28 m. lebar pilar 4m, panjang pilar 10m, ukuran rerata diameter partikel (D50) 0.91 m, kecepatan aliran rerata 1,36 m / det,koefisien bentuk pilar (K1) round nose 0.75, koefisien sudut datang aliran (K2)0 0 adalah 1 dan koefisien kondisi saluran (K3)small dunes 1,1, nilai bilanga Froude 0,29 maka hasil analisis kedalaman gerusan menggunakan metode CSU diperoleh sebesar 2,96 m dan dengan metode Froehlich sebesar 1,61 m. Dengan hasil ini diharapkan menjadi masukan bagi Pemerintah Daerah Kabupaten Nagan Raya untuk dapat merencanakan penanganan gerusan lokal akibat adanya pilar jembatan yang sesuai dengan kondisi wilayah studi
ANALISIS TARIKAN PERGERAKAN PENGUNJUNG PASAR BINA USAHA DI KOTA MEULABOH
Full text linkPrior to expansion of area, West Aceh had an area of 10,097.04 km2 or 1,010,466 ha after expansion of the West Aceh area to 2,927.95 km2, consisting of 12 sub-districts and 322 villages. The city of Meulaboh is located in Johan Pahlawan Subdistrict, one of the sub-districts of Meulaboh City that has a shopping center, the Business Development Market. Pasar Bina Usaha is the best-selling shopping center on the southwest coast, with congestion due to increasing community activity. This increase in activity is caused by the large number of movements of houses - markets - houses that affect the existing transport system. Against this background, it is necessary to examine the trait of the movement of the community from the home market house with the attraction model of the market visitors. Based on the analysis of the dominant factors influencing the attractiveness of the business market visitors, the number of family members (X1), the number of motorcycles (X3), the number of marketers (X9), the transport costs (X11), the number of marketers per day (X12) travel time (X15) and age (X16). Weekdays are dominated by the number of family members (X1), the number of motorcycles (X3), the distance of the market houses (X8), the number of marketers (X9), the number of marketers per day (X12), the purchase cost (X14 ) and travel time (X15), age (X16
PENGARUH SUBTITUSI BAHAN ANORGANIK PLASTIK TERHADAP KUAT TEKAN BETON NORMAL
Full text linkThe waste of used plastic bottles is the material that is widely found in the environment as waste of drinking water. The existence of this material used as a substitute for sand into a concrete mixture. The plastic bottle is further processed in certain way that it becomes fiber. The purpose of this research is to know the influence of the use of plastic material as a substitute of sand to the compressive strength of concrete. The benefits of this research can reduce the environmental impact on plastic bottles used as concrete mixtures. The research was conducted by laboratory experimental method to get the data followed by analysis to obtain the result of compressive strength. The aggregate used is crushed stone with a maximum aggregate diameter of 25 mm. The planned concrete quality of K-250 with Water Cement Ratio (FAS) is 0.60. The specimens used were cylinders with diameter 15 cm, H = 30 cm with total 24 pieces. This research was conducted to describe the development of compressive strength on concrete by using substitution (replacement) some sand with inorganic materials as much as 0.5%, 1%, 1.5%. As comparison made of normal specimens 0% (without plastic substitution). The compressive strength test was performed at 7 days and 28 days. The largest average compressive strength at the age of 7 days is on the use of 0% that is 15.396 MPa. Furthermore, for the age of 28 days has the largest average compressive strength of 20.592 MPa at a percentage of 0%. There was a decrease of concrete compressive strength with substitution testing of plastic materials of 0.5%, 1%, and 1.5% respectively. From the test results, the more percentage of substitution of plastic material added in the concrete mixture, the compressive strength decreased. Keywords : Anorganic, Compressive Strength, Normal Concret
EVALUASI NILAI WAKTU PERJALANAN PENJUAL PASAR TRADISIONAL
Full text linkThe value of travel time becomes an important part of profits in the assessment of a transportation project in terms of economic considerations. The time value is usually proportional to per-capita income, which is a fixed ratio to the income level. As for the limitations of the problem in this study is only done on a single market contained in the city of Meulaboh Business Market located at Jalan Daud Dariyah II Meulaboh City for the survey by way of filing questionnaires to kiosk owners and employees stalls Market Business as respondents , As well as compiling survey results into planned formats. The questionnaire data is inputted and then recapitulated to be analyzed by Kolmogorov-Sminnov Normality test method to ensure valid / normal data, and analysis ofspearman's rho and kendall's tau test methods in SPSS (Statistical Product and Service Solution) software. Based on the analysis of time value of go-and-go time of the seller, for the kiosk owner the time value goes 567,41 Rp / minute and the return time value is 108,18 Rp / minute. Sedangka for employees kiosk 691,68 Rp / minute (go) and 108,00 Rp / minute (go home). Furthermore, the results of the normality test stages by kolmogorov-smirnov with SPSS (Statistical Product andService Solution) method show that the output of the travel costs of owners and employees of kiosks (go-home), and the value of time owners and employees kiosk (go-go ) Value significance correction (Sig) <0.05, means that data is not normally distributed. Implementation on the data normality test (kolmogorov-smirnov) if the significance is below 0.05, means that the data has a significant difference with the normal raw data. Furthermore, non-parametric statistic is used with spearman's rho and kendall's tau, to know the relationship between travel cost and travel time value. The result of spearman's rho correlation shows positive number (+) on correlation coefficien, as well as correlation coefficien's correlation or tau indicates positive number (+) on correlation coefficien, meaning the greater the travel cost the greater the travel time. Keywords: Seller, Traditional Market, Travel Time Abstrac
ANALISIS DEFLEKSI JEMBATAN CABLE STAYED MENGGUNAKAN SOFTWARE ALLPLAN BRIDGE (ALUE BULOH BRIDGE)
Full text linkJembatan Alue Buloh merupakan jenis jembatan rangka baja jenis warren truss dengan panjang 180 meter yang menghubungkan Desa Latong dan Desa Alue Buloh. Dalam perencanaan ulang ini, jenis jembatan diubah menjadi jembatan cable stayed tipe kipas angin karena dapat meminimalisir efek gerusan yang terjadi pada aliran sungai. Perencanaan jembatan diawali dengan pengumpulan data primer berupa data jembatan eksisting dan data sekunder berupa data tanah, spektrum respon, data gerusan dan data sungai, kemudian data tersebut menjadi acuan perencanaan jembatan ini. Tahap selanjutnya adalah pemodelan jembatan menggunakan software jembatan allplan. Hasil pemodelan jembatan dianalisis untuk stabilitas pilar, defleksi menara/tiang, momen pamungkas, defleksi gelagar kotak. Acuan regulasi dari rencana ini antara lain SNI 1725-2016, SNI 2833-2016, (PPPJJR) 1987 dan Surat Edaran Menteri PUPR 2015 tentang Petunjuk Teknis Pelaksanaan Jembatan Teruji Kabel. Dari hasil perencanaan menggunakan jembatan allplan 2021, total panjang jembatan adalah 350 meter dengan sistem cable stayed bridge tipe kipas angin. Bentuk trapesium girder kotak sel tunggal dengan ketinggian 2,5 meter. Ketinggian menara/tiang adalah 59 meter. Bentuk abutment yang digunakan adalah tipe T terbalik dengan tinggi 9,03 meter dan lebar 7 meter
Forecasting coconut production in West Aceh Using GIS and SARIMAX
No full textCoconut (Cocos nucifera) is a strategic commodity for agro-industrial development in Indonesia, especially in Sumatra, which is home to 34.5% of national coconut plantations. One of the major producers, with a coastal geography and tropical climate that is highly suitable for coconut plantations, Aceh Barat, is currently facing the threat of degradation of coconut plantation land loss due to the government\u27s Regional Action Plan for Sustainable Palm Oil Plantations (RAD KSB Aceh 2023-2026). This study aims to look at the total coconut plantation land by integrating geospatial analysis (QGIS) and SARIMAX time series modelling to map coconut plantations in 2024, estimate production trends, and assess the viability of the agro-industry amidst land use conflicts. Results from mapping with QGIS software showed a drastic decrease in coconut area from 3,330.25 hectares in 2022 to 928.2 hectares in 2024. The reduction in coconut plantation area is signalled by RAD KSB\u27s oil palm expansion target of 1,078,728 hectares by 2026. In addition, the results of the mapping obtained several sub-districts with the largest contribution in West Aceh, namely Kaway XVI (234.82 ha) and Muereubo (217.46 ha) of coconut plantation area, while Bubon (16.67 ha) and West Woyla (38.42 ha) experienced significant land conversion. The study also calculated coconut fruit production of 1,229,267 kg (1,229 tonnes) per month from 12 sub-districts, and generated revenue from selling only coconuts of IDR 2.23 billion. SARIMAX forecasts showed high accuracy (RMSE: 700-704; MAPE: 0.19-1.05%) for 10 sub-districts, except Bubon (MAPE: 2.13%) and West Woyla (MAPE: 1.05%) due to data volatility. Furthermore, projections for the next five periods were carried out and obtained results, namely, Period 1 (104,425.88 kg), Period 2 (94,851.07 kg), Period 3 (97,399.50 kg), Period 4 (96,721.21 kg), and Period 5 (96,901.75 kg) which were dominated by stable production in the core area of Kaway XVI: 311,870 kg/month, but volatile in smaller areas. Spatial analysis prioritises Samatiga (58.53 ha) and Arongan Lambalek (79.27 ha) for agro-industrial development, with potential for value-added products.Coconut (Cocos nucifera) is a strategic commodity for agro-industrial development in Indonesia, especially in Sumatra, which is home to 34.5% of national coconut plantations. One of the major producers, with a coastal geography and tropical climate that is highly suitable for coconut plantations, Aceh Barat, is currently facing the threat of degradation of coconut plantation land loss due to the government\u27s Regional Action Plan for Sustainable Palm Oil Plantations (RAD KSB Aceh 2023-2026). This study aims to look at the total coconut plantation land by integrating geospatial analysis (QGIS) and SARIMAX time series modelling to map coconut plantations in 2024, estimate production trends, and assess the viability of the agro-industry amidst land use conflicts. Results from mapping with QGIS software showed a drastic decrease in coconut area from 3,330.25 hectares in 2022 to 928.2 hectares in 2024. The reduction in coconut plantation area is signalled by RAD KSB\u27s oil palm expansion target of 1,078,728 hectares by 2026. In addition, the results of the mapping obtained several sub-districts with the largest contribution in West Aceh, namely Kaway XVI (234.82 ha) and Muereubo (217.46 ha) of coconut plantation area, while Bubon (16.67 ha) and West Woyla (38.42 ha) experienced significant land conversion. The study also calculated coconut fruit production of 1,229,267 kg (1,229 tonnes) per month from 12 sub-districts, and generated revenue from selling only coconuts of IDR 2.23 billion. SARIMAX forecasts showed high accuracy (RMSE: 700-704; MAPE: 0.19-1.05%) for 10 sub-districts, except Bubon (MAPE: 2.13%) and West Woyla (MAPE: 1.05%) due to data volatility. Furthermore, projections for the next five periods were carried out and obtained results, namely, Period 1 (104,425.88 kg), Period 2 (94,851.07 kg), Period 3 (97,399.50 kg), Period 4 (96,721.21 kg), and Period 5 (96,901.75 kg) which were dominated by stable production in the core area of Kaway XVI: 311,870 kg/month, but volatile in smaller areas. Spatial analysis prioritises Samatiga (58.53 ha) and Arongan Lambalek (79.27 ha) for agro-industrial development, with potential for value-added products
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
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