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Geotechnical Mapping for Soil Physical and Mechanical Parameters and Hard Soil Depth in Badung Regency
Get PDFThe infrastructure is important for the great life of a region and most of the country. Therefore, infrastructure must be always in proper condition in its functionality. Furthermore, it must follow the main principle which is infrastructure asset management. In this case, geotechnical mapping is also related to the principles of Infrastructure Asset Management in planning, designing, and feasibility studies of an infrastructure project in Badung Regency, hence the infrastructure projects are better prepared. The research methods include collecting soil investigation data, processing soil investigation data, describing the results of soil investigation data with mapping tools, and geotechnical zoning with statistical analysis. The results obtain geotechnical map of Badung Regency in 2 and 3-dimensional form. The 2D results in the form of a hard soil depth map can be concluded that South Kuta District has a variation depth of 0.4 – 15 meters, North Kuta District has a variation depth of 1.5 – 5 meters, Kuta District has a variation depth of 1.5 – 10 meters, Mengwi District has a variation depth of 1.5 – 10 meters, Abiansemal District has a variation depth of 5-15 meters, Petang District has a variation depth of 5-22 meters. The 3D Zone 1 lithology map can be concluded that Zone 1 area covered with hard soil depth around 5 – 10 meter is dominated by sandy silt, silty sand, sand and a little clayey silt. That area covered with hard soil depth about 1.5 – 5 meter is dominated by clay, clayey silt, sandy silt, silty sand and sand with heterogeneous distribution. The Zone 1 area is dominated by the specific volume saturated value (γsat) range of 1.5 – 2.0 t/m3. The values > 2.0 t / m3 is found in Sading area with hard soil depth of 5-10 meters. The Zone 1 area is dominated by the range of N-SPT values = 0 - 30. The N-SPT values > 30 are found in Sading area with hard soil depth 5-10 meters
Risk Analysis of the Impact of Pandemic COVID-19 on the Health and Economy of Fishery Households in Kedung Cowek Village, Bulak, Surabaya
Get PDFSince the COVID-19 pandemic hit Indonesia, many fishery households on Indonesia's coast have been affected. Therefore, an analysis of the impact of the COVID-19 pandemic was carried out on the health and economy of fisheries households in the coastal areas of Kenjeran Beach, especially in Kedung Cowek Village, Bulak, Surabaya. The Fault Tree Analysis (FTA) method is used to find the probability of decreasing fisheries household welfare and the Event Tree Analysis (ETA) to find the level of risk for each factor causing the decline in the welfare of fishery households. The analysis result shows that 21 factors cause household welfare in Kenjeran Beach to decline, grouped into two intermediate events: decreasing fisheries household income and decreasing fishery household health. The probability of fishery household welfare decreases by 0.0171212. Decreasing welfare of fisheries households has a risk that fisheries household income will not experience a decrease in income, and there is no spread of COVID19, with a risk probability of 0.0052 and having a medium risk index level. Based on this, stakeholders in the income and health of fisheries households such as the government, analytical institutions, and households have a role in mitigating the impact of COVID-19
Cover Jurnal Manajemen Aset Infrastruktur & Fasilitas Vol.6 No.1 Juli 2022
No full textAnalisis Numerik Perilaku Geser Sistem Sambungan pada Blok Batu Bangunan Bersejarah Amalia Ula Hazhiyah, Adhitya Yoga Purnama & Devi Oktaviana LatifKinerja Aset Fisik Pasar Rakyat Kecamatan Singaparna Nurlaila Fadjarwati & Irma Mega PutriKajian Variasi Waktu Rendaman terhadap Penuaan Asphalt Concrete-Wearing Course (AC-WC) menggunakan Aspal Iran Zulkifli Podungge, Frice L. Desei & Fadly AchmadStrategi Baru untuk Analisis Stabilitas Lereng Batuan Wilham George LouhenapessyAnalisa Kepuasan dan Prioritas Kebutuhan Fasilitas Hunian Sewa Mahasiswa Widi Dwi SatriaPemetaan Sebaran Jenis dan Kondisi Tanah berdasarkan data Sondir (CPT) menggunakan Sistem Informasi GeografisNurly Gofar & Muhammad Ismai
Kajian Variasi Waktu Rendaman terhadap Penuaan Asphalt Concrete-Wearing Course (AC-WC) menggunakan Aspal Iran
Get PDFTujuan dari penelitian ini adalah menganalisis sejauh mana durabilitas (keawetan) campuran AC-WC menggunakan agregat lokal quary Longalo dengan bahan pengikat aspal Iran ditinjau dari spesifikasi umum 2018 revisi 2. Parameter keawetan campuran AC-WC dilihat dari Indeks Kekuatan Sisa (IKS), Indeks Durabilitas Pertama (IDP), dan Indeks Durabilitas Kedua (IDK). Penelitian ini dilaksanakan di laboratorium dengan benda uji yang direndam selama 0,5; 24; 48; 72; 96 dan 144 jam dalam waterbath. Berdasarkan hasil penelitian campuran AC-WC, nilai IKS adalah 96,66%, nilai IDP adalah 0,14% dan nilai IDK adalah 1,70%. Campuran AC-WC menggunakan aspal Iran tahan terhadap kerusakan akibat temperatur
Optimization of Ethylene Glycol Plant Heat Exchanger Network with Non-Catalytic Hydration Process from Ethylene Oxide
Get PDFHeat integration is a method to increase energy efficiency in a series of processes by utilizing the energy potential of other process units, so that Maximum Energy Recovery (MER) will be achieved. One way to perform heat integration is through the design of a heat exchanger network (HEN). The HEN design simulation in this study was carried out in an ethylene glycol plant where in the process there is still a lot of wasted and unused heat. After the HEN simulation was applied, it was found that the heating value decreased by 59% from the existing condition, while the cooling value decreased by 79% from the existing condition. This causes the operation cost for utilities to decrease drastically but increase the capital cost due to the addition of 2 heat exchangers
Analisis Numerik Aliran Udara pada Rongga Hidung akibat Penyakit Sinusitis menggunakan Metode Volume Hingga
Get PDFPenelitian ini bertujuan untuk menganalisis aliran udara pada rongga hidung akibat penyakit sinusitis. Penyakit sinusitis adalah peradangan yang terjadi pada dinding sinus disebabkan oleh gaya hidup yang tidak sehat. Dampak sinusitis secara umum adalah gangguan sistem pernafasan akibat adanya penumpukan cairan pada rongga hidung. Akibat dari penumpukan cairan tersebut menyebabkan pembengkakan pada lapisan konka hidung yang terhubung langsung dengan organ sinus. Munculnya pemodelan matematika sebagai sebagai ilmu baru merupakan salah satu alternatif pemecahan masalah ini. Pemodelan matematika bertujuan untuk memperoleh formula yang menggambarkan keadaan aliran udara di rongga hidung sesuai dengan kondisi sebenarnya. Pemodelan matematika yang digunakan adalah menggunakan metode volume hingga. Metode volume hingga digunakan untuk menganalisis benda yang tidak terstruktur seperti aliran udara. Pada penelitian ini menggunakan bantuan software Matlab dan Fluent. Matlab digunakan untuk menampilkan menghitung numerik dan grafik hasil yang terjadi, sedangkan Fluent digunakan untuk memvisualisasikan keadaan yang terjadi. Hasil dari penelitian ini adalah untuk mengetahui aliran udara yang terjadi pada rongga hidung akibat penyakit sinusitis, semakin besar ketebalan penumpukan lendir pada dinding sinus maka kecepatan aliran udara yang dihasilkan semakin cepat. Hasil perhitungan menggunakan metode volume hingga didapatkan tingkat kesalahan kurang dari 0,001
Kendali Optimal Model Pertumbuhan Mikroalga dalam Chemostat
Get PDFMicroalgae is one of Indonesia's natural potentials that can be utilized in various needs such as producing energy products (bioethanol, biodiesel), biopolymer producing plastic and as a soil mixture for construction engineering, even as waste treatment by absorbing the remaining organic compounds and nutrients or absorb some of the hazardous compounds contained in the waste. One of the microalgae culture media is chemostat. Chemostat is a type of continuous bioreactor that functions for the cultivation of microalgae and other microorganisms that are usually used in laboratory and industrial scales. In this study, control efforts on the microalgae growth model in the chemostat were carried out. This is so that the growth of microalgae reaches the equilibrium value in the minimum possible time. By applying Pontryagin's Minimum Principle and dilution parameters as control variables, it is obtained that the type of control carried out is bang-bang control. Then the control problem is solved numerically using the ICLOCS2 toolbox. The simulation results showed that microalgae were able to reach equilibrium conditions faster by 40.9% under the control. So, it can be said that the system can be controlled optimally
NUMERICAL SIMULATION OF NON – UNIFORM CORROSION INDUCED CRACKING
Get PDFThis research is focused on modeling the damage of concrete due to corrosion. The load used in this paper is only focused on the internal load due to rust expansion. In this study, corrosion was modeled uniformly and non-uniformly to investigate the difference between these two configurations to the damage in concrete. The simulation in this study was carried out using the 3DNLFEA program. The results show that numerical simulation provides predictions that are in line with experimental and numerical modeling results performed by the previous study in terms of pressure and corrosion cracking patterns. From the crack analysis, the pattern found that a non-uniform corrosion model can be used to express a realistic rust corrosion development around the reinforcement. Meanwhile, uniform corrosion requires a larger loss of steel area to reach the damage stage. Therefore, for non-uniform corrosion, the corrosion rate cause cracks and reaches a limiting crack width at earlier times in the service life of the corroded part
Transformation of Monohull to Catamaran Hybrid (Diesel-PV) Fishing Vessels to Reduce Exhaust Emissions
Get PDFThe fishermen's dependence on fossil fuels is still very high at 95.4% and has not decreased until now. The increased fuel price and reduced fossil fuel availability make fishermen struggle to fish. IMO (International Maritime Organization) noted that around 277 million tonnes of fuel are consumed by ships with fossil fuels. According to an emissions study conducted by IMO, 961 million tonnes of CO2 accounted for 2.5% of global emissions. This study aims to reduce exhaust emissions by vessels from fossil fuels by making the ship into a hybrid (Diesel-Pv). Making the ship a hybrid with solar panels will save fuel consumption. The method used is the trozzi method approach. The results obtained from changing the configuration to a hybrid can reduce the issued emission by around 57%