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    FRONT COVER VOL.9 NO.1 2023

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    Literature Review : Pengaruh Elemen Desain Ruang Kafe Terhadap Dining Experience dari Solo Diners

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    Saat ini gaya hidup dan pola konsumsi konsumen mengalami perubahan terutama di daerah perkotaan. Salah satunya dengan perkembangan tren konsumen solo diners. Solo diners merupakan konsumen yang melakukan kegiatan konsumsi seorang diri tanpa orang lain di tempat makan publik. Motivasi menjadi solo diners untuk memiliki kebebasan dalam memilih waktu dan tempat makan serta untuk menikmati waktu sendiri (quality time). Namun, kondisi ruang kafe saat ini masih didominasi kepada pengunjung berkelompok sehingga belum sepenuhnya mengakomodir kebutuhan solo diners. Berdasarkan hal tersebut menjadi kesempatan bagi pelaku bisnis kafe untuk merancang ruang yang dapat mengakomodasi solo diners. Didukung dengan pernyataan bahwa konsumen solo diners merupakan target pasar yang baik. Dalam penelitian ini akan menggunakan metode literature review untuk mengindentifikasi konsumen solo diners dan faktor ruang yang mempengaruhi pengalaman solo diners. Diketahui bahwa solo diners dengan tipe lonely mengalami pengalaman yang kurang menyenangkan saat konsumsi seorang diri dibandingkan dengan solo diners dengan tipe solitary. Tata letak meja, jarak meja, dan posisi duduk, merupakan elemen desain ruang yang memberikan dining experience yang menyenangkan bagi solo diners

    Analysis of Drag Reduction Due to Hydrophobic Coating Application by Experiment

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    Nowaday, at least 80% of the world's cargo is shipped via marine transportation modes, so with the amount of shipping activity, the shipping industry produces air pollution of at least 3.3% of global carbon dioxide emissions. The problem is trying to be answered by reducing a fuel use, one of which is through drag reduction. It is estimated that at least 80-90% of the drag that occurs on VLCC (Very Large Crude Carrier), comes from frictional drag that occurs on the surface of the hull. One of method to reducing frictional drag is by applying a hydrophobic coating. The hydrophobic coating has molecular physical properties to repel water. Similar as the water on a lotus leaf that can’t wet the leaves even a little, this phenomenon is called the Hydrophobic effect. Applying the hydrophobic coating on the specimen is done by spraying hydrophobic coating paint. As It seen from the contact angle with value above 900 shows the hydrophobic effect on the coated surface. This research aims to prove whether the application of hydrophobic coating on the hull specimen would give a significant effect such as buoyancy increase and drag reduction characteristics. The research method used is the experimental method by pulling the ship model utilizing the free fall of the load mass to provide a pulling force to the ship model and hydrophobic evaluation of the surface. The experiment was carried out in the Diponegoro University’s hydrodynamics lab with the assumption that the increase in acceleration is a drag reduction. From the test results, it was found that the drag reduction value has a percentage above 25% with the use of light mass variations. In the experiment, there is phenomenon of buoyancy increase characteristic appeared after the appliance of hydrophobic coating

    Cover Jurnal Manajemen Aset Infrastruktur & Fasilitas Vol.7 No.3 Oktober 2023

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    Analisis Kinerja Aset Pasar Ikan Modern Sabilulungan Berdasarkan Key Performance Indicators of Facility Nida Nurul Asyrifah & Ita SusantiAksesibilitas dan Fasilitas Pengaruhnya pada Kepuasan Pengunjung Taman Kota Flora Maria Renalda & Aceng Gima SugiamaPengaruh Pembangunan Bendungan Sepaku Semoi terhadap Ketersediaan Air Baku di Kabupaten Penajam Paser Utara dan Pemindahan Ibu Kota Negara Indonesia Rossana Margaret Kadar Yanti & Muhamad FauziPenggunaan Metode Cost Significant Model Untuk Memprediksi Biaya Pembangunan Jalan Baru Arjun Herlambang & Peter F. KamingEvaluasi Efektivitas Pelayanan Aset Terintegrasi di Stasiun Padalarang Adellia Putri Adisti & Moch. YusupPenilaian Wisatawan pada Aksesibilitas dan Fasilitas Desa wisata serta Pengaruhnya terhadap Kepuasan Aulia Ramadhanti & Aceng Gima Sugiam

    Gabion Wall Slope Stabilization for Pejagan – Prupuk Road Widening (STA 116+450)

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    The Pejagan – Prupuk road section continues to experience an increase in the interest of motorists, especially goods vehicles. In order to anticipate escalation of the traffic volume, road widening need to be planned to increase road capacity. The widening of the Pejagan – Prupuk road section needs to be done carefully. Road widening is carried out at an elevation of 4 meters from the subgrade so that a fairly unstable slope of the road body will be formed. The slope of road widening are modelled without reinforcement by using a Limit Equilibrium Method (LEM) software.  It generate Factor of Saferty (FS) value of 0.84, which means the slope is in an unstable condition. Unstable embankment slopes could be treated with geotextile and gabion. Furthermore, these reinforcements were used to stabilize the embankment slope. Based on a reinforcement modeling, gabion combined with geogrid as an alternative reinforcement was able to increase FS of embankment slope more than 1.5

    THE USE OF SECONDARY SKIN MATERIALS FOR NATURAL LIGHTING IN HOTELS RESORTS

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    Natural lighting is one aspect of ecological architecture to reduce energy use by utilizing sunlight as the main lighting. However, direct and excessive sunlight decreases the comfort level of room users because it can increase the room temperature and interfere with visualization. So it takes control of the distribution of sunlight into the room. In addition, the issue of environmental damage has become hot news among the community today, especially in the property sector, such as using materials that can damage the surrounding environment. Efforts to regulate the entry of sunlight into the room but not harm the surrounding environment, one of which is the application of second skin that utilizes environmentally friendly materials. This paper aims to determine the form and material of secondary skin that is environmentally friendly and suitable for use in resort hotels. This research uses a qualitative comparative method based on three objects in the form of secondary skin in the hotel resort building: Ananta Legian Hotel Bali, EcoSuites (A Reed-Clad Hotel Greece), and Lenora Hotel Bandung with variables namely opening, shape, and shading. For three secondary skin material objects in the resort hotel building, namely Amnaya Resort Kuta, Four Points by Sheraton Bali, and Potato Heads Studio Hotel Bali with variables namely shape, material, and aesthetics. Based on the results of the study, it was found that there are two types of second skin openings that are applied to the hotel resort building, namely dead openings and sliding openings that are applied to adjust the shape with the dominance of the modified rectangular base shape and the shadow produced from the second skin itself adjusts to the function of the shaded space. Environmentally friendly materials used are made from nature, such as vegetation, wood, and roaster bricks that do not damage the surrounding environment, which are applied in a modified rectangular base shape and can improve the aesthetics of the building

    Numerical Analysis on The Effect of Barge Motion to Jacket Lifting Process During Decommissioning

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    Offshore structure decommissioning is mandatory when an offshore oil and gas platform reaches the end of its service life. There are no less than 450 fixed offshore steel structures in Southeast Asia, and by 2030, more than 200 offshore fields will be terminated and need to be decommissioned. From an operational aspect, the decommissioning process is simply an inverse of installation. However, due to the structures' age and the uncertainties of the structural performance, the simple operation can be an obfuscating process. This paper discusses one of the most crucial processes during decommissioning: lifting. The dynamic performance of a lifted jacket in several rigging variations is investigated. We use a standard stern crane HLV (Heavy Lift Vessel) to simulate the process, with several wave attack angles. Sea condition is according to DNVGL benign wave during marine operation, with random waves generated using the JONSWAP spectrum. Coupled dynamics of HLV and jacket motion are analyzed

    Biodiesel Potentials of Waste Cooking Oil (WCO): Production, Content of Fuel Properties, and Effects on Engine Performance

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    The potential for biodiesel to become the main fuel in the future seems to be getting brighter with the enactment of government policies related to the implementation of the Euro 4 standard. In addition, the government has also launched de-carbonization to reduce the greenhouse effect by referring to the International Maritime Organization (IMO) plan which sets a target of reducing world carbon emissions by 40% by 2030 and 70% by 2050. To answer this challenge, this research aims to find out the bio-diesel production process by utilizing waste cooking oil (WCO), the next step is whether the biodiesel produced has content properties that are following the quality standards set by the government, the final step is that the bio-diesel is tested on a test engine to know the value of the engine performance produced. In this research two types of methods are used to solve the problem, the first is the transesterification method, which is a method commonly used in the process of making biodiesel, this method utilizes a catalyst to separate pure biodiesel from glycerol, in this research using methanol and NaOH catalysts. The second method is the experimental method, which is testing biodiesel directly on the engine so that the resulting engine performance values including power, torque, and SFC can be known. The test obtained results in the form of content of fuel properties still included in government standards which include Density, Viscosity, Flash Point, Pour Point, and Cetane Number. The best torque value is in the B15 fuel variation at engine speeds of 1400 RPM and 1600 RPM, for the best effective power value results in the B15 fuel variation using engine speed of 1600 RPM, and the best specific fuel consumption value in the B15 fuel variation at 1000 RPM engine speed. So it can be concluded that mixing coconut cooking oil with pure cooking oil into biodiesel can be used as an alternative fuel and has a good impact on diesel engine performance

    Effects of Collision with a Self-Propeller Oil Barge Ship on a Navigational Buoy

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    A navigation buoy is a navigational aid tool that is very important in supporting the safety of shipping lanes. However, navigation buoys are often lost and damaged, caused by several factors, one of which is being hit by a ship. Therefore, it is essential to conduct this research to determine the damaging effect on the navigation buoy after being hit by a vessel and to determine the effectiveness of using medium-density polyethylene material in the navigation buoy structure. This study uses a finite element numerical simulation method by making three variations of speed, as well as two variations of the angle of impact, namely 0° and 45°, which lasted for 0.1 seconds and was assisted by FEA software. The simulation results indicate that the largest maximum deformation occurs when the ship strikes the buoy with a speed of 7 m/s at an angle of 0° of 0.6 m. In this scenario, there is also a significant damage condition that results in tearing the buoy shell's surface by as many as 413 elements, or 1.24 m. The most extraordinary kinetic and internal energy produced occurred at a speed of 7 m/s with an angle of 45° of 147.15 kJ and 45.70 kJ. Therefore, it can be stated that the amount of buoy damage caused by a ship collision is dictated or impacted by the starting speed of the ship and the angle of impact state the most important part of your findings and achievement

    Front Cover Vol.20 No.1 2023

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