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Angkasa: Jurnal Ilmiah Bidang Teknologi

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Published by Institut Teknologi Dirgantara Adisutjipto

ISSN : 20859503 EISSN : 25811355 DOI : 10.28989/angkasa

Core Subject : Science,

Computer Science & IT

Arjuna Subject : -

Articles 343 Documents

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VIRTUAL TOUR OF SADENG BEACH TOURISM ROUTE USING THE MULTIMEDIA DEVELOPMENT LIFE CYCLE METHOD Retnowati, Nurcahyani Dewi; Nugraheny, Dwi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Gunung Kidul is a tourism potential area, one of which is a beautiful beach. Among the beautiful beaches and tourism potential is Sadeng beach. One way to publicize tourism is presented in the form of Virtual tour, so in this study the theme is about the Virtual tour of Sadeng Beach. Virtual tour of Sadeng Beach is one of the media that can be used to help prospective tourists explain about tourist routes from Bukit Bintang to Sadeng Beach, public facilities that are traversed, and detailed information about attractions. The virtual tour of Sadeng Beach tour route uses the Multimedia Development Life Cycle (MDLC) method which consists of determining the concept, design, determining material or data, making, testing, and evaluating. Virtual tour application test results show that this application can be run with a minimum Core i3 specifications with 4GB RAM and Windows 7 (64 bit) operating system with 5 screen resolution options and 6 graphics quality options. User test results with 30 respondents and calculations using a Likert scale showed 75.83% of this application included in the category of very good in terms of mentioning the time and distance from the beginning to the end of the tour.

CONCEPTUAL DESIGN OF BIRD-LIKE UNMANNED AERIAL VEHICLE FOR BIRD PEST CONTROL Junaidin, Buyung; Hartini, Dwi; Herlambang, Santo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Sparrow (Lonchura sp) bird pest becomes a serious problem for rice-plant farmers when entering harvest period because it could make crop yields decreases or even crop failure. There are many method have been done for bird pest control but almost all of that are not effectives. Bird-like unmanned aerial vehicle is proposed as an alternative solution to control bird pest. The aim of this research is to do conceptual design of unmanned aerial vehicle which look like predator bird for bird pest control in farm area. The predator bird which means is black eagle (Ictinaetus Malaiensis) which is one of natural predators of small birds including sparrow. Conceptual design of bird-like unmanned aerial vehicle follows general design process of aircraft with some simplification. Method of design adopt to Raymer?s method and sketching of black eagle planform especially wings and tail. The design results an unmanned aerial vehicle look like black eagle with cruise speed is 10m/s and operational altitude 120m above sea level. From aerodynamics analysis shows that bird-like unmanned aerial vehicle which have designed fill lift requirement at angle of attack 3o and longitudinal static stability criteria.

RANKING AND GROUPING FOR SCHOLARSHIP RECIPIENTS OF THE NAVY INFORMATION TECHNOLOGY PROFESSION Harmawan, Galih Aris; Supriyanto, Raden
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

The process of selecting scholarship recipients is a process that must be carried out in the context of providing educational scholarships. For the Navy, education is a very important thing in an effort to increase capability and professionalism in running an organization. The provision of educational scholarships for Navy personnel, especially in the environment of professional informatics, is carried out through selection of candidates' criteria that have been registered. Scholarship recipient data is processed to find the order of the candidates who will be determined as scholarship recipients. Prospective recipient data is considered by looking at certain criteria. Each criterion has a different weight. Based on the weights of each criterion, we can get weights that can be sorted according to certain priorities. For decision makers, many factors influence in determining a decision, so by using the Analytical Hierarchy Process (AHP) method and the Fuzzy C-Means (FCM) method a sequence and grouping of prospective scholarship recipients can be generated from each method. Based on the calculation results, in the AHP data that was entered as many as 747 candidate data, in the initial selection process obtained as many as 107 candidate data whose profession is informatics. All candidate data can be sorted based on the calculation of the assessment of eight criteria and ranking, from rank 1 to ranking 107. For processing time, the AHP method requires a longer time, which is ± 3 minutes, weighting process ± 1 minute, and ranking process ± 1 minute. Whereas in the FCM method, with the same amount of data it takes around ± 5 minutes until the iteration is complete or until the difference in objective function is smaller than epsilon. For the grouping results, this FCM method found that 43 candidates (40.19%) were strongly recommended, 31 candidates (28.97%) were recommended, and 33 candidates (30.84%) were not advised to receive scholarships with cluster validation in this study was 0.604. Hope in the future can simplify the calculation process for ranking and grouping selection, because it is already a computer application that is easy to use, and is expected to accelerate the selection process.

FORECASTING MONTHLY NAUTICAL CHART TIME SERIES OF JAVA AREA USING ARIMA METHOD (CASE STUDY: PRIMKOPAL PUSHIDROSAL SALES UNITS) Rushadi, Benny; Puspitodjati, Sulistyo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Nautical chart is a sea map made from paper and has a function to safety of navigation at sea as it provides vital information such as configuration of the coastline, depth of the sea, seabed nature, hazardous location, height and navigation aids. Sailing at sea and on the waters are not always safe as many navigational hazards threaten at any time, therefore the role of nautical charts is essential. Inaccuracy in estimating the number of nautical chart production has affected the amount of stockpiles in the warehouse, this is very inefficient for sales unit of Primkopal Pushidrosal. Consequently, the making of an appropriate forecasting model to predict the amount of stock in the coming period is expected to overcome these problems. The data which had been used in this research is Indonesian nautical chart sales from January 2012 to March 2019 in the Java area for 87 periods from January 2012 to March 2019 to predict the number of product requests for the coming 8 periods from April to November 2019, as the most densely sea traffic hence nautical charts in this area are the most utilized. The quantitative analysis of the model uses the Integrated Moving Average Autoregressive (ARIMA) method approach where the stages are from identification of model, estimation of parameter and diagnostic tests, because this method is good enough to predict short-term periods and is suitable for predicting the magnitude of any variable in time series data. Processing data uses Minitab 17 software and the results of the research showed that 87 of these periods where the data has not been stationer against mean, so it must be differentiated level 1 in order to be stationary and the ARIMA model is ARIMA(0,1,1) by equation Xt = - 0.551 + Xt ? 1 - 0.85et? 1.

PROMOTION SYSTEM FOR PROMOTIONAL PRODUCTS AND TOURIST OBJECT IN PATUK GUNUNGKIDUL DISTRICT Indrianingsih, Yuliani; Ayuningtyas, Astika; Mauidzoh, Uyuunul
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Patuk District is a gateway to enter Gunungkidul Regency. In Patuk District there are several tourist attractions such as Kampoeng Emas, Purba Volcano and Embung Nglanggeran. In addition, there is also the potential for processed food products from natural and agricultural products in Patuk District. Leading potentials in Patuk District need to be promoted to the wider community so that they are known and can be an attraction for tourists. The purpose of this research is to design and create a system of promotion of superior products and Web-based tourism objects that can facilitate Patuk District in introducing superior products owned by each village and facilitate the general public to obtain superior product information in Patuk District. The method used in the analysis and system design uses Unified Modeling Language (UML). In this study, a system consisting of three users was produced, namely admin in the Inter-Village Coordination Board (BKAD), admin of business owners and general users. This system can be accessed at the address www.jelajahipatuk.com.

INFLUENCE OF PANDANUS TECTORIUS LEAF FIBER ON MECHANICAL PROPERTIES AND MORPHOLOGY OF POLYPROPYLENE COMPOSITE Nugroho, Fajar; Sudarmanto, Sudarmanto
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Natural fiber reinforced polymer composites are widely developed because of their relative low price and eco-friendly. One of natural fiber sourches is pandanus tectorius leaf. This study aimed to determine the effect of variations in fiber volume fraction on tensile strength, impact strength, bending strength and morphological on sea pandanus fibers- polypropylene composites.Tensile test spesimen refer to ASTMD 638, impact test spesimen refes to ASTMD 5942-96, bending test spesimen refer to ASTMD 790 -02. The increasing of the volume fraction increased the tensile strength and impact strength. The tensile test results showed the highest tensile strength results for composites with a volume fraction of 35% was 25.82 MPa. The impact test results showed that the highest impact strength was obtained in the 35 % volume fraction of 0.0062 Joule/mm2. The bending test results showed that the highest bending strength was obtained in the 20% volume fraction of 24.96 MPa. Based on SEM test results, there were voids, cracks, fibers pull out on the composite.

ANALYSIS OF GOVERNANCE SECURITY MANAGEMENT INFORMATION SYSTEM USING INDEX KAMI IN CENTRAL GOVERNMENT INSTITUTION Hambali, Hambali; Musa, Purnawarman
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Information security is very vulnerable to institutions if there is interference from other parties outside the organization or institution as a supply chain of services that can pose an information security risk. Based on the Regulation of the Minister of Communication and Information Technology number 4 of 2016, the Electronic System organizers that operate Low Electronic Systems must apply the Information Security Index guidelines. Index KAMI are a tool in analyzing and evaluating the level of information security based on the criteria in organizations or in government institutions. The research objective is to measure the level of information security readiness that meets the requirements of the ISO/IEC27001: 2013 standard at the Central Government Institution Unit X. The results of the assessment with the index KAMI obtained an electronic system category score of 30, for the assessment of governance the score is 84, the risk management score is 35, the framework information security work value is 61, asset management 128, and the application of security and information technology has a value of 100, the level of information security maturity is level II+ with a value of 408, the results obtained up to the Compliance of the Basic Framework.

THE NAVIER-STOKES-CONTINUITY EQUATION SOLVER BASED ON ARTIFICIAL COMPRESSIBILITY METHOD Jalaali, Bahrul
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Fluid dynamics analysis can be accurately approximated by using a computer-based numerical method. Rely on the mass and momentum governing equation, the mathematics model for the compressible condition is numerically difficult to overcome. Through an artificial compressibility method, the quasi-compressible condition solution can be simplified. This study will investigate the classical lid-driven cavity case model to affirm the artificial compressibility method. The result shows that the current model is in-line with the previous study for the lid-driven cavity case. A conventional benchmark with the previous numerical study is shown as well.

STUDY OF THE POTENTIAL USE OF PARABOLA SOLAR TYPE STORES TESTED IN 500 GRAM WATER TO SUPPORT ENERGY RESILIENCE Mardwianta, Benedictus; subarjo, abdul haris; Wicaksono, Anugrah Budi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Solar energy is a huge and infinite source of energy so that solar energy can support energy resilience. Parabolic solar cell reflectors use mirrors. The purpose of this research is to determine the thermal collector's power and thermal efficiency on solar stoves. This research methodology is by taking data with time parameters that have been determined according to environmental conditions. The subjects of this study were parabolic solar cookers with a diameter of 84 cm to 500 gram water. The results of the average stove power obtained by 141.71 Watt and the thermal efficiency of the stove by 5.45%. The power of the stove is affected by the difference in temperature of the water after it has been heated by the temperature of the water before it is heated. The greater the temperature of the water after heating it will increase the power of the stove. The greater the overall heat transfer Qm and the smaller the intensity of solar radiation on the reflector using a mirror, the greater the thermal efficiency.

DESIGN TOOLS RECYCLED PAPER PRESS FOR THE MAKING OF PAPER FROM YOUNG COCONUT FIBER WASTE AND WASTE PAPER FOR HOME INDUSTRY BUSINESS Enda Apriani
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 1 (2019): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Processing of waste paper into recycled products has been carried out. Young coconut fiber and waste paper can be used as recycled paper for the industry. This research was conducted with the aim of designing the design of recycled paper presses to accelerate the drying of paper sheets made by manual processes. The research variable used is the composition of young coconut fiber (SKM) raw materials and used paper (KB) of 25: 75; 50: 50; 75: 25 (%) on variations in the proportion of PVAc adhesive types, namely 2% and 5% respectively. The results of this study produced a recycled paper press tool to dry paper sheets and the most optimal composition in producing paper for industrial needs, namely the composition of SKM: KB raw materials of 25: 75 (%) on the variation of 2% PVAc adhesive.

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