Fragmentation and fission of giant molecular clouds occasionally results in a pair gravitationally bound star clusters that orbit their mutual centre mass for some time, under the influence internal external perturbations. We investigate evolution binary with different orbital configurations, particular focus on Galactic tidal field. carry out $N$-body simulations evolving compare our estimates from semi-analytic model. The latter accounts loss due to stellar two-body relaxation, tides....

Ketertiban dan keteraturan administrasi sangat diperlukan karena menjadi salah satu komponen penting dalam proses pembelajaran. Sebagian sekolah dinilai tidak cukup baik sehingga kearsipan bertumpuk sulitnya mengambil kembali saat dibutuhkan. Penelitian ini bertujuan untuk mengevaluasi pendidikan di institusi dengan menggunakan metode kuesioner. Fokus utama penelitian adalah mengidentifikasi efektivitas sistem pendidikan, hambatan yang dihadapi, serta strategi peningkatan kualitas...

Revitalization of Vocational High Schools (SMK) is the core Presidential Instruction (Inpres) Number 9 2016 on Education, which emphasizes importance mastering applied expertise in specific fields. education requires students to master both theory and practical implementation through learning. The lack facilities SMK caused by high cost providing advanced equipment, rapid development technology, minimal cooperation with industry, limited competent teaching staff, suboptimal government...

Background: Porang contain glucomannan. Glucomannan is a water-soluble fiber, and has low calories, so porang needs to utilize its nutritional value in food products. The addition of mung beans flakes products will add because they iron, vitamin C zinc. Objective: aim the research was determine sensory chemical content (carbohydrate, protein, fat, water, ash, crude fiber breakability) flour bean flour. use experimental method with completely randomized design (CRD) 3 formulations, namely F1...

The use of single power solar system in generation electricity for streetlights nowadays is widely used. Generally, many this kind streetlight using one panel to its lamp. problem that can be arise how control and guarantee the optimal [1]. ACS712 current sensor voltage divider circuit with GSM communication allows monitor [2] both battery panel. information from then processed by a microcontroller. This microcontroller send data through server, via short message service (SMS). server...

This paper presents a design and implementation of system prototype for plant water nutrients distribution. Furthermore, it has been implemented to support the optimal application aeroponics system. It is based on monitoring which was used observe growing chamber's parameters such as temperature, light, pH. Meanwhile, control manage actuators i.e. mist maker fan delivering moisture. Sensor's data are transmitted via internet into server in order facilitate easier users. The successfully...

The main goal of this paper was to design and construct a hybrid autonomous underwater glider (HAUG) with torpedo shape, size 230 cm in length 24 diameter. control, navigation, guidance system were executed simultaneously using Udoo X86 minicomputer as the server three BeagleBone Black single-board computers clients. simulations showed controlled horizontal speed 0.5 m/s AUV mode 0.39 0.51 glide pitch angle between 14.13∘ 26.89∘. In addition, field experiments under limited space proposed...

Abstract Carbon dioxide (CO2) gas could increase oil recovery by means of swelling, evaporating and lowering viscosity. In the displacement front, injected may become enriched components dissolve into reservoir oil. By assuming that local thermodynamic equilibrium is occurring at oil-gas interface, phase behavior can be calculated equation state. The process modeled a set differential equations, called mass balance which written for each component in CO2 injected. linear velocity expressed...

Automation system hydroponic is one of the farming solution. There are several problems in that can be divided into two parts. First part system. The needs to control and monitor temperature, pH distribution water. Second power supply, generally it run from conventional electrical energy should continue all time. Electrical increasing time In this research, there possible solutions solve problem. first solution automation for hydroponics would measure water level tank. second smart solar...

The common method to prevent condensate from dropping out in gas-condensate reservoirs that are produced by pressure depletion is gas cycling: the reinjection of dry gas. However, expensive and not always available. An alternative could be nitrogen, which available everywhere, relatively cheap has favourable injection characteristics (safe, non-corrosive, environment-friendly).The problem with nitrogen injection, however, it may lead significant in-situ drop-out due mixing reservoir....

Based on previous studies, nitrogen injection could recover oil up to 45-90% of initial reserves.Although this method has a very good ability produce oil, sometimes the operation pressure is higher than leak off formation pressure.In study, used low solve problem under immiscible process.Objective study determine effect and displacement rate recovery performance continuous one dimensional gas with slim tube apparatus.The gas-oil contact composition was investigated using Gas Chromatograph...

Landasan Ulin is a center for vegetable production, and it has an important role in producing vegetables the city of Banjarbaru.Agricultural soil this study was assessed heavy metal contamination using geoaccumulation index (I geo ), factor (C f i degree d modified (mC Pollution Load Index (PLI) as well magnetic susceptibility.Samples were collected from topsoil analyzed susceptibility Atomic Absorption Spectrophotometer (AAS).The average concentration metals sampling area A Fe>Zn>Mn>Cu>Hg,...

Penelitian ini mendesain sebuah protoype alat pemilah barang berdasarkan warna menggunakan sensor TCS3200. Sistem mengindentifikasi 5 yaitu merah, hijau, biru, putih, dan hitam. Lima motor digunakan untuk setiap wrna. Setiap diaktifkan oleh tertentu. Satu DC juga menggerakan conveyor yang meletakkan benda akan diidentifikasi warna. Pada penelitian disusun desain mekanik elektronik TCS3200, driver DC. Alat dapat memilah dengan arna hitam, Hasil pengujian menunjukkan bahwa object kisaran...

The aim of this research is to obtain Sodium Lignosulfonate (SLS) surfactant from bagasse as an alternative petroleum sulfonate. experimental method the process SLS through two processes, hydrolysis and sulphonation process. Then tested for its characteristics FTIR test, LCMS NMR test compatibility test. Based on structure sodium lignosulfonate with empirical formula monomer (C11H16O8S)n, have hydrophil lipophyl groups. calculation Hydrophilic Lipophilic Balance (HLB), synthesized has a HLB...

Wheeled robot soccer is a that moves with wheels several capabilities, such as detecting, catching, dribbling, and kicking ball. A requires system or sensor to detect The development of computer vision technology enables ball using algorithm. In this research, the consisting camera single board computer. used capture an image process get position on image. information then processed map After that, mapping sent controller it into movement. Experiments result show designed function designed.

Abstract The purpose of this study was to examine the benefits and procedures for making chitosan polymer from chitin found in shrimp shells. This initial research aims synthesize membrane powder its characteristics. Chitin is main organic material groups crustaceans, insects, fungi, molluscs arthropods animals. Crab, lobster shells have long been known as sources production their content quite high. second most abundant natural biopolymer after cellulose. non-toxic produced commercially...

Remotely Operated Vehicle (ROV) for underwater exploration is typically controlled using umbilical cable connected to ground control station. Unfortunately, while it’s used power distribution and data transmission, it also obstruct the movement of ROV especially shallow water (<50 cm). This paper proposed an alternative method controlling wireless remote system. work aims explore possibility RF technology between 420-450 MHz as communication Furthermore, system was manage actuators...

The importance of an optimal method for electric power transmission is crucial ROV operation. Meanwhile, only few studies have shown the effect electrical system from supply to ROV.This paper proposes a design and implementation that developed by Tech_SAS team Telkom University, Bandung, Indonesia. This work aims obtain ROV's electronic components. compete on 1st 2nd ASEAN MATE Underwater Robotic Competition. has demonstrated 48V voltage can be transmitted with negligible drop when using 20...

Navigation is one of the main challenges in an underwater vehicle. To measure and sustain depth micro class remotely operated vehicle (ROV) robot demands competition. There are many sensors that can be used to depth; using a single camera sensor. In this works, camera-based control developed evaluated for ROV, namely as fitoplankton SAS ROV. Fitoplankton ROV prototype with six thrusters. maintain position, PID system sensor input setpoint used. Moreover, method distance triangle similarity...

Research activity in underwater wireless sensor and video transmission for marine aquatic environment monitoring has increased rapidly. Data acquisition system is essential component Remotely Operated Vehicle (ROV) especially or other surveillance. ROV's data typically transmitted using tether cable connected to ground control station. The use of may cause a problem since the can hinder movement ROV shallow water area. A mobile with solution play key role monitoring. This paper presented an...

Disaster recovery from underwater earthquake, plane crashes into the sea, and monitoring cables or piping for energy purpose are missions Remotely Operated Underwater Vehicle (ROV) in ASEAN MATE 2018 Competition. Two essentials factor to perform successfully this ROV competition design of an efficient communication protocol system a low-cost hardware. In research, optimal between RS-232 serial transmission RS-485 is developed obtain solution. Both tested Tech_SAS ROV-Telkom University...

The purpose of this study was to determine the effect surfactant concentration and middle-phase emulsion on oil recovery in EOR process. In research, phase-behavioral test with observation SLS bagasse three kinds crude is light (42°API), intermediate (25°API) heavy (18°API). From results these observations, it turns out form oil. composition which mostly forming middle phase (microemulsion) 10% proportion 10.000 ppm -1.5% while smallest (0%) 20,000 4.5% 40,000 4%. highest injection result...