Directory of Scientific Journals Indonesian Society of Applied Science (ISAS)
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Pengaruh Sedimentasi Terhadap Fungsi Kapasitas Saluran Drainase di Jalan Tongkol Kelurahan Seketeng Sumbawa Besar
Get PDFPopulation growth is always followed by changes in land use. These changes mean that the land surface can no longer absorb rainwater naturally, creating a high runoff coefficient and affecting erosion rates. Rainwater is channeled into the drainage along with erosion material. The increased sedimentation process causes silting of the channel which results in a decrease in drainage capacity. The purpose of this study is to determine the characteristics of sediment by grain size analysis method and the results of grain diameter range from 1.062 mm to 1.506 mm, categorized as very coarse sand with specific gravity (ρs) of 0.00239 kg/m3. Knowing the Bed load Transport Rate with the Meyer-Petter and Muller Method which is around 1.714×103 m3/year. Knowing the rate of suspended load transport using the USBR (United States Beureu Reclamation) Method which is 0.0443 tons/year. As well as knowing the percentage of sediment to the Tongkol street drainage channel along the research location of 74.46% and categorized as severely damaged. The recommended action that can be taken is rehabilitation. Drainage channel rehabilitation can be done by dredging sediment, as well as repairing damaged channel construction by CL Directorate General of Natural Resources Men PU No. 02 / SE / 2011.Pertambahan penduduk selalu diikuti dengan perubahan fungsi lahan secara besar-besaran. Perubahan ini mengakibatkan permukaan tanah tidak dapat lagi menyerap air hujan secara alami, sehingga menciptakan koefisien limpasan tinggi dan memengaruhi laju erosi. Air hujan tersebut dialirkan ke drainase bersama material erosi. Proses sedimentasi yang meningkat menyebabkan pendangkalan saluran yang mengakibatkan penurunan kapasitas drainase. Tujuan penelitian ini yaitu untuk mengetahui karakteristik sedimen dengan metode analisis ukuran butir dan hasilnya diameter butiran berkisar dari 1,062 mm sampai 1,506 mm, dikategorikan sebagai pasir sangat kasar dengan berat jenis (ρs) sebesar 0,00239 kg/m3. Mengetahui Laju Angkutan Dasar dengan Metode Meyer-Petter dan Muller yaitu sekitar 1,714×103 m3/tahun. Mengetahui laju sedimen melayang dengan menggunakan Metode USBR (United States Beureu Reclamation) yaitu sebesar 0,0443 ton/tahun. Serta mengetahui persentase sedimen terhadap saluran drainase Jalan Tongkol sepanjang lokasi penelitian sebesar 74,46% dan dikategorikan rusak berat. Sesuai dengan SE Ditjen SDA Men PU No. 02/SE/M/2011 rekomendasi tindakan yang dapat dilakukan adalah rehabilitasi. Rehabilitasi saluran drainase dapat dilakukan dengan pengerukan sedimen, serta perbaikan konstruksi saluran yang rusak
Analisis Pendapatan Usaha Kopra Pada Desa Lumahlatal Kecamatan Taniwel Timur Kabupaten Seram Bagian Barat
Get PDFAbstract
Taniwel sub-district is one of the sub-districts in West Seram Regency (SBB). This region is also an economic center for the Maluku community but has not been supported by the availability of companies engaged in production so most agricultural products are sold out of the region. Agriculture is a very important and dominant sector in the life of the Indonesian people since before independence. Most of the population is in rural areas and relies on the agricultural sector. Food production to meet the needs of the community is almost entirely produced by smallholder agriculture. However, during the colonial period, smallholder agriculture did not progress much. This study aims to determine the income of copra farming in Lumahlatal Village, East Taniwel District, West Seram Regency. Data collection in this study used the observation method. Analytical techniques used in this study are descriptive, qualitative data, quantitative data are analyzed based on the distribution table of Lumahlatal Village. Then the income of respondents in the copra business was obtained amounting to Rp.7,875,000. Where the total revenue is Rp. 10,000,000 with an average total production cost of Rp.2,125,000.
Keywords: income, business, productio
Perbandingan Kapasitas Struktur Cermaton yang Diubah Menjadi Pile Slab Terhadap Beban Rencana
Get PDFOne of the bridges on the Serpong-Balaraja Toll Road section 1a project with the longest span is the Cisadane Bridge, which will employ a PCI Girder superstructure with a length of 50.8 meters. The approach road structure for the Cisadane Bridge was originally intended to employ Cermaton with a soil pile that was 6–8 m high. However, during construction, the design of the approach road changed from Cermaton to pile slab. In order to determine which structure is the most suitable for use, it is required to assess its performance. The SAP2000 program was used to check the bearing capacity of the foundation, the settlement that took place, and the structural capacity against seismic loads as part of the evaluation that was done as a result of changes in the structural design. The study results for structural design change demonstrated that the Cermaton was not superior to the pile slab since the Cermaton\u27s decrease, which was 11.3 mm as opposed to 1.06 mm for the pile slab, was substantially greater. For an analysis of earthquake loads using SAP2000 software, it was found that Cermaton is not strong enough to withstand earthquake loads, while the pile slab is strong enough to withstand earthquake loads because the capacity of the pile slab is still adequate.Jembatan Cisadane merupakan salah satu jembatan dengan bentang terpanjang pada proyek Jalan Tol Serpong – Balaraja seksi 1a yang direncanakan menggunakan Struktur atas PCI Girder dengan panjang 50,8 meter. Pada Sta 2+500 – 2+564 direncanakan Struktur jalan pendekat jembatan menggunakan Cermaton dengan timbunan tanah setinggi 6 – 8 m, namun ditengah pelaksanaan berlangsung terdapat perubahan desain pada struktur jalan pendekat Jembatan Cisadane dari cermaton menjadi pile slab. Oleh karena itu perlu dilakukan evaluasi terhadap kinerja struktur tersebut untuk mengetahui struktur mana yang lebih tepat digunakan. Evaluasi yang dilakukan kerena perubahan desain struktur dilakukan dengan cara pengecekan terhadap kapisitas daya dukung pondasi, penurunan yang terjadi serta kapasitas struktur terhadap beban gempa yang dianalisis dengan menggunakan bantuan software SAP2000. Hasil penelitian untuk perubahan desain struktur menunjukan bahwa cermaton tidak lebih baik dibandingkan dengan pile slab dikarenakan penurunan yang terjadi pada cermaton jauh lebih besar dibandingkan dengan pile slab yaitu sebesar 11.3 mm, sedangkan pile slab 1,06 mm. untuk analisis terhadap beban gempa dengan menggunakan software SAP2000 didapatkan hasil bahwa cermaton tidak kuat menahan beban gempa sedangkan pile slab kuat menahan beban gempa karena kapasitas pile slab masih memadai
Penempatan Pendeteksi Masker Untuk Pencegahan Penyebaran Covid di Kampus dan Pelabuhan
Get PDFAt this time the world has been hit by the Covid-19 pandemic since 2019. The government advises the Indonesian people to follow the Health protocol. One of them is to wear a mask when we travel to public places. Some public places that are difficult to avoid include schools/campuses and ports. The people of the Riau Archipelago are very dependent on sea transportation modes. The movement of people is very massive in both places. Therefore, people are expected to always be disciplined in using masks in crowded places. To ensure and remind the public to always wear a mask is rather difficult. So we developed a mask detection device and stored it in public places. This tool leverages artificial intelligence technology with deep learning. This tool works very well, it can remind people who don\u27t wear masks, even those who wear masks that aren\u27t right.Beberapa tempat umum sulit untuk dihindari terkait pembatasan aktifitas akbiat Covid-19, diantaranya adalah sekolah/kampus dan pelabuhan. Perpindahan manusia sangatlah massif di kedua tempat tersebut. Untuk memastikan dan mengingatkan masyarakat untuk selalu mengunakan masker agak sulit, kami mengembangkan alat pendeteksi masker dan menyimpannya di tempat-tempat umum. Pengabdian ini menerapkan hasil penelitian dan disimpan di dua tempat yaitu di kampus dan di pelabuhan. Alat ini memanfaatkan teknologi kecerdasan buatan dengan deep learning. Sistem ini terdiri dari kamera, untuk mendeteksi orang tanpa masker, sebuah komputer untuk mengolah data, sebuah layar untuk menampilkan tangkapan kamera beserta speaker. Dimana jika terdeteksi orang yang tidak mengunakan masker ataupun yang tidak memakai secara baik, maka akan terlihat dilayar dan akan diingatkan secara audio. Alat ini berfungsi sangat baik, dapat mengingatkan orang-orang yang tidak mengunakan masker bahkan yang mengunakan masker yang tidak benar. Hal ini sesuai dengan hasil wawancara dengan pengelola kedua tempat tadi
Implementasi Metode LCG Pada Aplikasi CBT Untuk Tes Potensi Akademik Berbasis Web
Get PDFIn the Academic Potential Test of new students at the Raudhatul Akmal Islamic College (STAIRA) Batang Kuis, do not yet have a Computer Based Test (CBT) or a computer-based exam for the freshman academic potential test exam. So that the exam is still carried out manually and costs a lot of money in its implementation. But it also makes the exam process less carried out because some students can cheat when filling in answers by cheating friends. Therefore, in this study aims to create a web-based Computer Based Test (CBT) application and randomize the questions in it by applying the Linear Congruent Generator (LCG) method. The result of this study is a web-based application for academic potential test exams that are expected to overcome the problems that exist in the current STAIRA Batang Kuis. The order of the questions will be automatically randomized when students conduct an academic potential test exam based on their respective student identification numbers
Analisis Postur Kerja Menggunakan Metode Rapid Entire Body Assesment (REBA) Proses Pembuatan Buis Beton
Get PDFThere are quite a number of entrepreneurs making precast concrete in Polokarto sub-district, the community works as precast concrete making workers as their life support. The resulting production is in the form of Buis Concrete/Concrete Pipes. The process of making concrete buis, among others: the process of selecting materials, mixing process, lifting process, printing process, drying process. Activities carried out during the production process are carried out repeatedly, causing complaints to workers. These complaints arise due to non-ergonomic body postures causing pain in some parts of the body felt by workers. This study aims to determine the level of risk and the percentage of complaints felt during the process of making concrete buis. The methods used are Nordic Body Map (NBM), and Rapid Entire Body Assessment (REBA). The results of the research from the NBM questionnaire on the manufacture of concrete buis segemn workers\u27 bodies experience complaints are the waist, back, right shoulder, right upper arm and right hand. Research using the REBA method has a risk level ranging from 7-10 so it includes a moderate to high level of risk that requires work posture action.
Keywords: Concrete buis making, Work posture, NBM, REBAPengusaha pembuatan beton pracetak di kecamatan polokarto sudah terbilang cukup banyak, masyarakat berprofesi sebagai pekerja pembuatan beton pracetak sebagai penopang kehidupan mereka. Hasil produksi yang dihasilkan berupa produk Buis beton/Pipa Beton. Proses pembuatan buis beton antara lain: proses pemilihan bahan, proses pencampuran, proses pengangkatan, proses percetakan, proses pengeringan. Aktivitas yang dilakukan selama proses produksi dilakukan secara berulang-ulang sehingga menimbulkan keluhan pada pekerja. Keluhan tersebut muncul disebabkan postur tubuh yang tidak ergonomi menyebabkan timbulnya rasa sakit pada beberapa bagian tubuh yang dirasakan pekerja. Penelitian ini bertujuan untuk mengetahui tingkat resiko dan presentase keluhan yang dirasakan selama proses pembuatan buis beton. Metode yang digunakan adalah Nordic Body Map (NBM), dan Rapid Entire Body Assessment (REBA). Hasil penelitian dari kuesioner NBM pada pembuatan buis beton segemn tubuh pekerja mengaalami keluhan adalah bagian pinggang, punggung, bahu kanan, lengan atas kanan dan tangan kanan.Sehingga dapat dinyatakan adanya pengaruh beban kerja terhadap pekerja terhadap keluhan musculosketal disorders. Penelitian menggunakan metode REBA memiliki tingkat level resiko kisaran angka 7-10 sehingga termasuk level resiko sedang sampai tinggi perlu tindakan postur kerja.
Kata Kunci: Pembuatan buis beton, Postur kerja, NBM, REB
Evaluasi Produksi Alat Mekanis pada Unit Crushing Plant di PT TOP Kabupaten Mempawah Kalimantan Barat
Get PDFTOP is a mining company in granodiorite located in Mempawah Regency with a production target of 150 tons per day. Mining activities are carried out by blasting which are transported using a Dump Truck to be sent to the Crushing Plant unit to be processed according to size. The processing of granodiorite in the Crushing Plant unit consists of two stages, namely Primary crushing and Secondary crushing. The tools used are 1 unit of primary crushing (Jaw Crusher) and 1 unit of Secondary crushing (Cone Crusher). The use of crushing equipment is supported by equipment such as hoppers, feeders, screening and belt conveyors. This series of processing produces production in the form of stone ash, 1x1 mm, 1x2 mm, and 0.5 mm. The purpose of this activity is to evaluate the achievement of granodiorite production targets at PT. TOP and knowing the factors that hinder the performance of the crushing plant tool. The results of the evaluation of production on belt conveyors 11,12,13, and 14 are in accordance with the production target at PT. TOP, but the production target is not optimal. For this reason, the company can increase production targets without add a belt conveyor to the Crushing Plant unit. while the factors that hinder the performance of the crushing plant are the slow handling of the damaged crushing plant machine, the material size is too large.TOP merupakan perusahaan yang bergerak dibidang pertambangan batu granodiorit yang berlokasi di Kabupaten Mempawah dengan target produksi 150 ton/hari. Aktivitas penambangan yang dilakukan dengan cara peledakan yang kemudian diangkut menggunakan Dump Truck untuk dikirim ke unit Crushing plant agar diproses sesuai ukuran. Pengolahan granodiorit di unit Crushing plant terdiri dari dua tahap yaitu Primary crushing dan Secondary crushing. Alat yang digunakan yaitu 1 unit primary crushing (Jaw Crusher) dan 1 unit Secondary crushing (Cone Crusher). Penggunaan alat Crushing tersebut didukung oleh alat penunjang seperti Hopper, feeder, screening dan belt conveyor. Rangkaian pengolahan tersebut menghasilkan produksi berupa abu batu, 1x1 mm, 1x2 mm, dan 0,5 mm. Adapun tujuan dari kegiatan ini adalah mengevaluasi ketercapaian target produksi granodiorit di PT. TOP dan mengetahui faktor-faktor yang menghambat kinerja alat crushing plant..Hasil evaluasi produksi pada belt conveyor 11,12,13, dan 14 telah sesuai dengan target produksi di PT. TOP, namun target produksi tersebut belum optimal. Untuk itu perusahaan dapat meningkatkan target produksi tanpa perlu menambah alat belt conveyor pada unit Crushing plant. sedangkan faktor yang menghambat kinerja crushing plant adalah lambatnya penanganan terhadap mesin crushing plant yang rusak, ukuran material terlalu besar
Pembuatan dan Pelatihan Tata Kelola Website Sekolah SMK "Dhuafa", Kota Padang
Get PDFThe school website is currently a trend in the world of education and the website is getting attention, very good responses from various parties, both from education staff, students and the community. The school website is a website specifically intended for school agencies. This website can be used as a medium for students to find information about schools and as a means of supporting teaching and learning activities. Dhuafa Padang Vocational High School (SMK) is one of the vocational schools in Padang City that provides free education for its students. Currently, SMK Dhuafa Padang does not yet have a school website. Therefore, the implementing team carried out service by developing a school website and carrying out website governance training. The implementation of the service consists of two stages of activities, namely the creation of a school website for SMK Dhuafa Padang and the implementation of technical guidance on managing the school website. After the implementation of the service, SMK Dhuafa Padang already has a school website that can be a means of promoting the school for the community. The website can be accessed at https://smkdhuafapadang.sch.id.Website sekolah saat ini tengah menjadi trend di dunia pendidikan dan website memperoleh perhatian, tanggapan yang sangat bagus dari berbagai pihak baik dari tenaga kependidikan, siswa serta masyarakat. Website sekolah adalah website yang khusus diperuntukkan untuk instansi sekolah. Website ini bisa digunakan sebagai media siswa-siswi dalam mencari informasi seputar sekolah maupun sebagai salah satu sarana pendukung kegiatan belajar mengajar. Sekolah Menengah Kejuruan (SMK) Dhuafa Padang adalah salah satu sekolah kejuruan di Kota Padang yang menyediakan pendidikan gratis bagi siswanya. Saat ini SMK Dhuafa Padang belum memiliki website sekolah. Oleh karena itu tim pelaksana melakukan pengabdian dengan membuatkan sebuah website sekolah serta melaksanakan pelatihan tata kelola website. Pelaksanaan pengabdian terdiri atas dua tahap kegiatan yaitu pembuatan website sekolah SMK Dhuafa Padang dan pelaksanaan bimbingan teknis pengelolaan website sekolah. Setelah pelaksanaan pengabdian, SMK Dhuafa Padang telah memiliki sebuah website sekolah yang dapat menjadi sarana promosi sekolah bagi masyarakat. Website dapat diakses pada alamat https://smkdhuafapadang.sch.id
MIXER DESIGN EQUIPPED WITH HEATING CONTROL ELEMENTS FOR MANUFACTURING COMPOSITE MATERIALS
Get PDFComposite is a composite material consisting of two or more materials with different mechanical properties. Composite materials are mixed to obtain new materials that have better micro-mechanical properties. To facilitate the mixing of composite materials and obtain materials that have good quality, in this study, a mixer machine design with heating elements was carried out so that the temperature could be adjusted as needed. Experiments from the results of a mixer machine with a heating element that have been made are comparing the mixing of resin and iron sand using a mixer machine without a heating element and using a heating element. The result of mixing composite materials using a mixer machine without heating elements is that the composite material is homogeneously mixed but when viewed from the micro-photos there are still many white spots so that the quality of the composite material is still not good. then the composite material is mixed and mixed using a mixer machine with a heating element, the composite material is homogeneously mixed and after seeing from the micro-photos there are a few wite spots on the composite
Penggunaan Abu Batu Sebagai Pengganti Sebagian Material Pasir
Get PDFThe concrete industry in Indonesia is very advanced and developing, so the use of construction materials is increasing. Another material is needed as a substitute for fine aggregate for the manufacture of concrete, namely stone ash from the waste stone industry. The purpose of this study was to determine the effect and value of the compressive strength of concrete characteristics with the use of rock ash with mixed variations (10% rock ash, 90% sand), (20% rock ash, 80% sand) and (30% rock ash, 70% sand). with a concrete quality target of Fc\u27 17.5 Mpa. The method used is the laboratory experimental method referring to the SNI standard. The results showed that the use of stone ash (AB) as a normal concrete mixture affected the compressive strength of concrete. The higher the percentage of stone ash (AB), then the value of the compressive strength of concrete increases. The value of the compressive strength of concrete from rock ash (AB) at the composition of AB 10%, AB 20% and AB 30% was 173.50 kg/cm2, 235.11 kg/cm2 and 239.88 kg/cm2 while normal concrete was 18.59 MPa at the age of 28 days.Industri beton di Indonesia sudah sangat maju dan berkembang, sehingga penggunaan material konstruksi menjadi semakin meningkat. Dibutuhan material lain sebagai pengganti agregat halus untuk pembuatan beton yaitu abu batu berasal dari limbah industri batu belah.Tujuan penelitian ini menentukan pengaruh dan nilai kuat tekan karakteristik beton dengan penggunaan abu batu dengan variasi campuran (10% abu batu, 90% pasir),(20% abu batu, 80% pasir) dan (30% abu batu, 70% pasir) dengan target mutu beton Fc’ 17,5 Mpa. Metode yang digunakan yaitu metodeeksperimen laboratorium mengacu standar SNI. Hasil penelitian menunjukkan penggunaan abu batu (AB) sebagai campuran beton normal mempengaruhi nilai kuat tekan beton. Semakin tinggi persentase abu batu (AB), maka nilai kuat tekan beton semakin meningkat. Nilai kuat tekan beton dari abu batu (AB) pada komposisi AB 10%, AB 20% dan AB 30% diperoleh sebesar 173.50 kg/cm2, 235.11 kg/cm2 dan 239.88 kg/cm2sedangkan beton normal 18.59 MPa pada umur 28 hari