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ASRO JOURNAL - STTAL
ISSN : 24607037     EISSN : -     DOI : -
ASRO JOURNAL is bi-annual international referred journal with the objectives to explore, develop, and elucidate the knowledge of operation research, system analysis, logistic management, and policy & strategy to keep practitioners and researchers informed on current issues and best practices, as well as serving as a platform for the exchange of ideas, knowledge, and expertise among technology researchers and practitioners. ASRO (Analisis Sistem dan Riset Operasi) Journal provides an opportunity to share detailed insights from different understandings and practices associated with technology. It provides an international forum for cross-disciplinary exchange of insights and ideas regarding value and practices for dissemination. ASRO (Analisis Sistem dan Riset Operasi) Journal will publish your work to international society of practitioners and researchers with interest in technology and development from a wide variety of sectors.
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Articles 216 Documents
DISTRIBUSI SIFAT MEKANIK SEBAGAI AKIBAT LAKU PANAS YANG BERBEDA PADA MATERIAL MILD STEEL GRADE A DI KRI NALA-363 Sutrisno, Sutrisno; Rinaldi, Chris; Kurniawan, Agung Budi
JOURNAL ASRO - STTAL - INTERNATIONAL JOURNAL Vol 5 (2016): Jurnal Analisis Sistem & Riset Operasi
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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Abstract

Pada tahun 2009 yang lalu KRI Nala – 363 yang merupakan kapal perang tipe Korvet TNI Angkatan Laut mengalami kebakaran di Laut Jawa. Prosedur pemadaman kebakaran di kapal telah dilaksanakan, mulai dari pemadaman dengan menggunakan CO2 Central, APAR (Alat Pemadam Api Ringan), sampai dengan menggunakan Hydrant. Kejadian tersebut memakan waktu kurang lebih 1 jam. Dari kejadian tersebut, maka timbul permasalahan apakah plat yang telah mengalami kebakaran tersebut masih layak digunakan atau tidak. Dari permasalahan diatas, maka dilakukan sebuah simulasi dengan menggunakan Heat Treatment material yang sama dengan material plat lambung KRI Nala – 363 yang terbakar, yaitu material Mild Steel Grade A. Untuk memperoleh hasil yang optimal, maka dalam penelitian ini akan divariasikan besarnya waktu penahanan (Holding Time) yaitu 10 menit, 30 menit dan 60 menit serta variasi media pendingin yaitu udara, oli bekas, busa pemadam, dan air laut. Hasil pengujian kekerasan Brinnell menunjukkan bahwa spesimen awal mempunyai nilai kekerasan 151 HB. Setelah mengalami proses laku panas, ternyata spesimen yang mendapatkan quenching air laut mempunyai nilai kekerasan yang paling tinggi yaitu 222 HB untuk waktu tahan 10 menit, 151 HB untuk waktu tahan 30 menit, dan 199 HB untuk waktu tahan 60 menit. Sedangkan untuk spesimen yang mendapatkan quenching udara, oli bekas, dan busa pemadam nilai kekerasan relatif sama dengan spesimen awal. Data ini bersesuaian dengan hasil uji tarik, yang menunjukkan spesimen yang didinginkan dengan air laut mempunyai Tensile Strength yang paling tinggi. Sehingga spesimen yang mendapatkan quenching menggunakan air laut tidak dapat dipergunakan lagi, karena sifat mekaniknya berubah secara signifikan dibandingkan spesimen awal. Kata kunci: Holding time, quenching, heat treatment/laku panas, metalografi test, ferrite, pearlite
DESIGN OF GPS AND COMPASS HELMET VISUAL DATA USING MICROCONTROLLER FOR MARINE FORCE OF INDONESIAN NAVY Hartanto, Endin Tri; Sahiri, Erpan; Gunawan, Agung; Purwanto, Muhammad Sigit
JOURNAL ASRO - STTAL - INTERNATIONAL JOURNAL Vol 11 No 03 (2020): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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Abstract

The Marines are a component of the combat forces owned by the Navy. In carrying out their duties as infiltration forces and landing forces, sophisticated equipment is needed to support each movement in terms of knowing the position of coordinates in the form of latitude longitude and compass direction to facilitate the movement of troops in carrying out operational tasks. For this reason, a tool was made to visually know the position of the latitude and longitude of the compass, making it easier for troops to carry out their duties both on the training ground and on the battlefield. This tool is in the form of a Design Combat Helmet for Visual Data Viewer GPS and Microcontroller-based Compass for the Navy Navy. This tool uses Arduino Mega Pro Mini 2560 as a microcontroller, V.KEL 2828U7G5LF as a GPS module, HMC5883L as a Compass module and Wemos Oled LCD 64x48 0.66 "as an analog data viewer. This tool has a working principle like Google Glass that can display data visually. How it works in order to display data visually is to use the reflection of a small mirror that will be enlarged using a convex lens or loop lens and then transmitted the reflection to a visual viewer that is placed in front of the eye. In order to get data in the form of latitude longitude and compass direction alternately a push button is used which is designed as a data selector switch or counter. In testing, this tool proved to be accurate in taking GPS data and compass direction after compared with equipment that has the same function. For the V. KEL2828U7G5LF GPS Module compared to FURUNO GPS and Google Map, while for the HMC5883L Compass module compared to the Android Compass Application. Keywords: GPS data, Compass, Visual Combat Helmet
RANCANG BANGUN SISTEM KEAMANAN RUANG SANDI BERBASIS PENGENALAN CITRA WAJAH DI SATKOM LANTAMAL V SURABAYA Nugraha, Dedi; Solin, Lamhot Marsidi; Bukit, Alexander Victor; Syahlan, Zainal
JOURNAL ASRO - STTAL - INTERNATIONAL JOURNAL Vol 7 (2017): Jurnal Analisis Sistem & Riset Operasi
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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Abstract

Informasi dan teknologi yang terus berkembang pada saat ini membuat komputertidak lagi hanya sebagai alat komputasi semata, akan tetapi telah beralih menjadi sebuahmesin yang hampir dapat menyamai kemampuan otak manusia untuk dapat mengenali wajahmanusia terutama pencarian pada database wajah yang memiliki ukuran sangat besar.Pengenalan wajah merupakan proses identifikasi manusia dengan menggunakan ciri darisuatu raut wajah manusia, salah satu teknik yang dikembangkan pada sistem pengenalanwajah adalah eigenface, yang akan memberikan suatu nilai ciri dari wajah dalam bentukeigenvector (Eigenface) terhadap gambar wajah yang akan diamati, kemudian hasil yangdiperoleh akan menentukan identitas pemilik wajah tersebut.Pengamanan pintu ruangan sandi sangat diperlukan sekali, untuk itu pada tugasakhir ini dirancang sebuah sistem pengenalan wajah yang dapat memberikan hak aksesterbatas hanya kepada orang yang memiliki tugas dan tanggung jawab terhadap ruang sandi.Sistem pengenalan wajah ini dapat mengontrol purwarupa pintu dengan komunikasiserial dari personal computer (PC) ke mikrokontroler (arduino uno) sehingga akanmenggerakkan solenoid pengunci pintu untuk membuka pintu apabila gambar wajah tersebutdapat dikenali. Adapun tingkat keberhasilan sistem pengenalan wajah ini bergantung terhadappencahayaan, posisi dan mimik wajah. Hasil uji coba sistem sistem yang dikembangkan padatugas akhir ini menunjukkan tingkat akurasi 95% dengan batasan ekspresi wajah normal,posisi kepala di depan kamera, serta pencahayaan yang wajar.Kata kunci : Eigenface, Eigenvector, Face recognition system.
POTENTIAL OF SEA FLOW ENERGY AS A RENEWABLE ENERGY SOURCE (RENEWABLE ENERGY) ON THE CAPALULU HOLIDAY, NORTH MALUKU Widjayanto, Joni; Bandono, Adi; Astika, I Made Jiwa; Tresnadi, Agung
JOURNAL ASRO - STTAL - INTERNATIONAL JOURNAL Vol 11 No 1 (2020): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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Abstract

One of the biggest obstacles to development progress in Eastern Indonesia is the unavailability of electricity,especially on small island islands. The potential of ocean currents is one of the most renewable sources ofenergy considering that the majority of Eastern Indonesia is the ocean and has not been utilized optimally. Thepurpose of writing this paper is to reference the calculation of ocean currents for Indonesian coastal islands thathave minimal electricity. This research method uses literature studies on the morphology of the flow velocity andwind that occurs in the Capalulu Strait and the calculation of the potential of electrical energy in the CapaluluStrait so that the results of this calculation are used as one of the renewable energy methods that are able tomeet the electricity needs of island islands. which has not been electrified in Indonesia, especially in the SulaIslands, North Maluku.Keywords: Electric Energy, Ocean Flow Turbine, Renewable Energy, Strait of Capalulu
ANALYSIS OF BULBOUS BOW RESISTANCE WITH DIMPLE (BASIN) ON KRI CLASS STRATEGIC SEALIFT VESSEL (SSV) USING CFD SOFTWARE Maulana, Dwi Putra; Arief, Irfan Syarif; Kusuma, Cahya; kusdiana, wawan; Syaifi, Mohammad
JOURNAL ASRO - STTAL - INTERNATIONAL JOURNAL Vol 11 No 1 (2020): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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Abstract

The function and role of the Strategic Sealift Vessel (SSV) ship type is very important. Modifications andchanges to improve the value of efficiency will be very necessary. This efficiency value is closely related to thevalue of Ship Resistance , where if the Resistance value goes down, the value of the ship's efficiency will rise.The increase in efficiency is then expected to reduce fuel consumption and increase speed. In several studies,ways have been improved to improve the condition, one of them is by adding a Dimple to the Surface Area ofthe ship, this modification will reduce the friction Resistance that the ship will receive by reducing the WettedSurface Area that the fluid will pass at certain speeds and conditions. . This modification will be applied to theship's Bulbous Bow section. In this way it is expected to improve the value of the Resistance produced by theBulbous Bow installed in the ship, without having to carry out significant changes or modifications and changethe shipbuilding of the existing Linesplane. Furthermore, the analysis is carried out by modeling using 2D and3D CAD Software and Model Experiments using CFD Applications. After carrying out the entire process ofRunning with the CFD Software to determine the value of the Ship Resistance . The final conclusion is in theform a reduction the value of vessel Total Resistance the Running Bow section of 31.53% in the 4th variationsand Fn used is 0,341.Keywords: Boulbous Bow, CFD, Dimple, Reduction, Resistance
DESIGN OF PROTOTYPE ELECTRICAL FIRING DEVICE SMOKE POWDER BOMB INTEGRATED IN ANDROID Hartanto, Endin Tri; Irawan, Bagus; Sunarta, Sunarta; Saputra, Atet
JOURNAL ASRO - STTAL - INTERNATIONAL JOURNAL Vol 11 No 1 (2020): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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Abstract

Threats are any businesses and activities, both from domestic and foreign countries which are consideredendangering the Indonesian sovereignty, the territorial integrity of the country, and the safety of the wholenation. Military threats are threats that use organized armed forces that are judged to have abilities thatjeopardize the country's sovereignty, the territorial integrity of the country, and the safety of the whole nation.This smoke powder firing system is to utilize the internet network so that to trigger the smoke powder bomb canbe carried out from various places and anywhere the smoke powder weapons ignition can be carried out.Design and Composite Smoke Powder as a Marine, Air and Ground Defense Sabotage Weapon. This researchis expected to be able to contribute to sabotage cysts and deception of opponents. The main objective in thedesign of the building of Smoke Powder as a means of supporting smoke bomb training in a pattern to trick theenemy. In planning the bomb lighter system uses an electric lighter which is controlled remotely via an Androidphone call. The lighters used are gas stove lighters with 3 Volt dc battery voltage source. So that themicrocontroller device can regulate the flow of current to the lighter, the author uses a transistor that functionsas switching power sources to the lighter. The command for switching resources to a lighter is obtained from thecommand of an Android device. The test results show the system can work well, even though the constraintsoccur in the system, namely the GSM network which often interrupt.Keywords : Smoke powder, switching, Android, GSM.
DESIGN OF SHOOTING SCORE RECORDING INFORMATION SYSTEM BASED ON IMAGE PROCESSING Rozikin, Choirur; Kurnianto, Fifin; Ahmadi, Ahmadi; Syaifi, Mohammad
INTERNATIONAL JOURNAL OF ASRO - STTAL Vol 9 No 1 (2018): International Journal of ASRO
Publisher : Indonesian Naval Technology College - STTAL

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Abstract

Image processing shooter-based Information System is very useful for STTAL, which has a visionto become a center for the development of defense science and technology in the field of military,maritime and reliable seas at the regional level in realizing the independence of the main weaponssystem.STTAL has the mission of organizing higher education programs to produce human resourceswith Indonesian character and personality, based on science and technology that are of high quality andrelevant to the defense needs of the military, maritime and marine departures. In carrying out its duties asan educational institution, STTAL also carries out its obligations as the Indonesian National Army. So withthat STTAL often hold short barrel or pistol shooting exercises. In a series of short barrel or pistolshooting activities, each process of recording values is still carried out visually, that is by looking directlyat the target and counting manually, so that it takes a lot of members of the shooting committee and takesa long time in recording values. We design a application of image processing information system basedshots which can be used in shooting exercises to facilitate all members in carrying out shooting exercisesat STTAL. In this application the shooter can see firsthand the value of the shot obtained so that it canconcentrate fully in carrying out a shooting exercise. In this application also makes it easy for the head ofthe shooting committee to make a report to the commander quickly and accurately, for the commander tosee first hand the results of the shooting practice and it's easy to take a decision on shooting practice.Keywords: Value Marker, Shooting, Image Process.
REGIONAL PORT DEVELOPMENT STRATEGIES: A CASE STUDY OF BRANTA PORT DEVELOPMENT Jiwandhono, R. Aditya Jalasena; Triatmodjo, Bambang; Priyanto, Sigit
JOURNAL ASRO - STTAL - INTERNATIONAL JOURNAL Vol 11 No 1 (2020): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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Abstract

Branta Port, located in Pamekasan Madura, is a connecting port area around Java Island and Madura Island. The port has an important role in logistics and supply chain activities as well as economic development in Indonesia, especially in Java and Madura. But the reality is Branta Port has some shortcomings in the port facilities to security sector. It based on the lack of regulation enforcement of the port management itself. The lack of renewal of the port master plan is also one of the obstacles to the port's poor performance. Therefore, with this research, it is expected to obtain a broad picture of the development strategy at the Branta Port. The methods are Location Quotient (LQ) & ships loading and discharge at port forecast using several forecasting analysis. The results show the ships call, loading and discharge flow at Branta Port have a fluctuating pattern follow the seasonal trends in salt production activities in Madura region. Where in 2039 (long-term) the loading and discharge flow at Branta Port is predicted to reach 380,927 tons which in 2018 amounted to 139,855 tons. The results of the port performance calculation are performed using port performance indicators called Berth Occupancy Ratio (BOR), where the BOR value from year to year to the long-term forecasting year (2039) is 22.08%, which is still below 40% for an additional indicates that the jetty is not busy according to UNCTAD criteria. Whereas the need for port facilities such as warehouses and stacking fields has increased. The development strategy focused on port facilities such as the berth length expansion from 100m to 186m, construction of port warehouses of 183m2, improvement of several port facilities such as navigation facilities and causeways, also the addition of port waste treatment facilities.Keywords: Location Quotient, forecasting, econometric method, Berth Occupancy Ratio
DESIGN OF FUEL’S VOLUME MEASUREMENT MONITORING SYSTEM ON INDONESIAN NAVY FUEL TANK “SPBT” BASED ON THE Internet of Things (IoT) Faturrochman, Mochammad; Suprayitno, Suprayitno; Zulkifli, M; Widodo, Edy
JOURNAL ASRO - STTAL - INTERNATIONAL JOURNAL Vol 10 No 1 (2019): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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Abstract

Refueling Stations are places where motorized vehicles can get fuel. The Refueling Station in theTNI is known as the SPBT (TNI Refueling Station) or often referred to as the gas station. SPBT generallyonly provides two types of fuel such as Premium (MT88) and diesel (HSD). This SPBT usually has a tankthat is used to hold fuel oil which will later be used for Dinas vehicles. The development of science,technology creation at this time has penetrated digital technology. Most of the technology used byhumans is completely digital. In this case it is very helpful in various aspects, for example in the industrialsector, many industrial fields have used digital technology due to human limitations and are demanded tobe fast, practical and precise. Of the several applications of digital technology, one that is needed in anindustrial field is a tool to monitor a material that is in a closed container. This technology helps officials tomonitor the amount of fuel from the field without having to open the material container when they want tofind out information about the fuel. As one example is the technology to monitor the condition of fuel oilstorage tanks in the SPBT within the Navy to find out information on the volume of fuel in the tank.Keywords: Kodiklatal SPBT, Internet Of Things (IoT) Fuel Volume Monitoring System.
MODIFICATION OF THROTTLE, ENGINE STOP, AND DATA INPUT MECHANISM SYSTEM IN ELEVATION SYSTEM, AND ROTARY CANON TANK AMX 10 PAC 90 USING CAMERA SENSOR Prabowo, Ayip Rivai; Deriva, Dueng; Prasetijoadi, Endro; Bangun S, Sigit
JOURNAL ASRO - STTAL - INTERNATIONAL JOURNAL Vol 11 No 1 (2020): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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Abstract

Along with technological developments in the industrial revolution era 4.0 military technology is required to beable to adjust to the development of human resources or defense equipment. Research that has been donepreviously is that the Throttle manually changed using Throttle with DC motor drive, there are somedisadvantages caused by using a DC motor, among others, it is difficult to map the direction and speed of themotor so it is difficult to drive, the same as that used as an engine mover Stop that is by using a DC Type Motorwhile for the input system of rotary and elevation is still manually operated by the remote controller operator.From the debate that occurred the author will make modifications to the throttle system that uses a DC wipermotor in exchange for using an angle motor can be easily, for the engine Stop the same system that is initiallyusing a DC wiper motor is replaced using a servo motor so that the mapping angle of 0 degrees to 90 degreescan be easily mapped, while for elevation and rotary canon by inputting data with the camera module using thecamera sensor as for microcontroller data inputKeywords: Stop Engine, dc motor

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