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<![CDATA[Algoritma Adaptif Sistem Downlink Menggunakan Recursive Least Square (RLS) ]]>
<![CDATA[Basukesti, Agus]]>;
<![CDATA[Dirgantara, Bangga]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[GPS (Global Positioning System) is the popular system for navigation which assistance 32 satellites orbiting the earth. Currently, tracking positions using the Global Positioning System (GPS) is one of the best positioning tracking methods. However, GPS has a lot o f noise, so filters are needed to handle with noise on GPS. In this research, the simulation is done to extract data from GPS sensors using RLS algorithm. From the results o f identification and simulation, it can be concluded that the algorithm works well and need to analyze the advantages and disadvantages to be implemented on the downlink system designed. From the simulation results obtained that error estimation is convergent that is the longer the smaller.]]>
<![CDATA[ANALISIS KARAKTERISTIK HIDROLOGI SUNGAI GAJAHWONG DAERAH ISTIMEWA YOGYAKARTA ]]>
<![CDATA[Supatno, Supatno]]>;
<![CDATA[Asih, Andrea Sumarah]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 1 (2016): Mei ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[Structuring and technical planning for the development of a watershed requires analysis of hydrological characteristics. This study aimed to analyze the hydrology characteristics of Gajahwong river to be formulated technical effort Gajahwong watershed development. Stages of analysis using secondary data from the Balai PSDA DIY Province, such as watershed maps, daily rain, rain hourly, daily discharge, discharge offlood and flood event records from 2001 to 2013. Analysis of peak flow /flood hydrograph using frequency analysis methods and Collins unit hydrograph methods. While the low-flow analysis using the model HSS Gama I and HS Gama II. The tools used are ArcView, frequency analysis program and Solver are contained in Microsoft Excel. Based on the analysis o f the peak flow of the flood discharge of 20 annual plan obtained 332 m3/ s happened in the 4th hour. While based on a low-flow analysis it can be concluded that during the dry season are still available Gajahwong river flow is sufficient to meet the needs o f well water for irrigation, fisheries and river tours.]]>
<![CDATA[PERKEMBANGAN TEKNOLOGI DAN PENTINGNYA LITERASI INFORMASI UNTUK MENDUKUNG KETAHANAN NASIONAL ]]>
<![CDATA[subarjo, abdul haris]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 2 (2017): November ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[Technology makes it easy to get various information. Various sources can be easily accessed. The speed of providing up-to-date information on social media has become one of the necessities of late. Indirectly assist the dissemination of various information in Indonesia. Technological updates make no geographical barrier, norms, ethical boundaries, less visible. The various facilities offered will have a higher value if the truth of the information can be accounted for. On the other hand as a human being still has inherent human rights, as well as citizens. Therefore, in accessing, utilizing and disseminating various information obtained required a filter called information literacy. Anyone who has had information literacy does not easily disseminate information without first checking the truth. Distribution of various information that is correct and polite will make the recipient of information reasoning well so it is not easy to be hooked to do something unsettling. Thus, information literacy is essential to support national resistance.Keywords: technology, information literacy, national resistance. ]]>
<![CDATA[PENGARUH VARIASI JUMLAH FASTENER TERHADAP KEKUATAN STRUKTUR REPAIR LONGITUDINAL FLOOR BEAM PESAWAT B737-300 ]]>
<![CDATA[Santoso, Djarot Wahju]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[Longitudinal floor beam structure is a rod that serves to support the weight of the passenger seat, the passenger load and luggage on airplanes. Bending load received by the structure continuously during flight operations cause damage (cracks). The presence of cracks in the structure of the repair needs to be done to ensure the safety of the aircraft during operation. Structure Repair Manual (SRM) is a guide issued by the manufacturer of the aircraft maintenance company to do the repair. In SRM was not stated clearly that the repair is safe. To determine the level of safety o f longitudinal floor beam structure repair Boeing 737-300 fractured analysis is needed also to determine the effect of the number of fasteners to the strength of the modified structure. Modeling and analysis of longitudinal structural floor beam using CATIA V5R16 software. Imposition o f the structure using a bending load due to the load compartment main cabin. Four models are made in accordance with the repair of such structures to handle SRM model fractured. Modifications done by reducing fastener types BACB30FN6 6 to 5 and 4 fastener on the upper area of the beam. Static analysis performed on models with CATIA V5R16 to determine the safety o f the structure is based os margin of safety.The results of analysis that the longitudinal floor beam structural repair the fractured secure against bending loads. The use of a modified structure repair by reducing the number of fastener would increase the critical stress that occurs, but the structure is still safe to load.]]>
<![CDATA[UJI BEDA PELANGGARAN TRAFFIC LIGHT BERDASARKAN LOKASI PELANGGARANNYA ]]>
<![CDATA[Ridayati, Ridayati]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[The increasing of the vehicles flow on Yogya-Solo street causing congestion at some points in the Klaten district. The main cause of the congestion is the number of traffic violations which lead to the accidents. Bendogantungan, south Klaten, is one of the most congested point in this district. This study is aimed to determine the causes and the effects of traffic light violations and to examine the difference o f traffic light violations based on the point of violations in the intersection of bendogantungan, Yogya-Solo street. The results show that the practical mind-set of Klaten community in driving has created an instant community. Many people of that community have not realized yet on the importance of traffic regulation, this causes the number of accident. The result of analysis using SPSS 15 shows that there is a significant difference between the one way traffic violation at Empu Sedah street and eastward of Yogya-Solo street. The difference also appears between the one way traffic violations at Empu Sedah street and the westward of Yogya-Solo street. It also happens between the right turn of Ki Ageng Pandanaran street and the westward of Yogya-Solo street.]]>
<![CDATA[ANALISIS PENERAPAN PENGGUNAAN GRAPHIC EDITOR PADA PEMBUATAN OBJEK 3 DIMENSI ]]>
<![CDATA[Retnowati, Nurcahyani Dewi]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[Three-dimensional applications has evolved penetrated in almost all areas of work, especially in the field of multimedia and other virtual media. Offeature films, television, print design to production games. LightWave 3D is a software that can model an object once animate. This research model a 3D object using LightWave Modeler then analyzed the results of modeling using graphic editors in LightWave Layout. To connect between LightWave Modeler and LightWave Layout used LightWave Hub. Analysis using the graphic editor can make a better model for the selection of each layer more detail.]]>
<![CDATA[THE EFFECTS OF ANGLE OF ATTACK, REYNOLD NUMBERS AND WINGLET STRUCTURE ON THE PERFORMANCE OF CESSNA 172 SKYHAWK ]]>
<![CDATA[Pratiwi, Henny]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 1 (2018): Mei ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[This research aims to investigate the effects of angle of attack, Reynold numbers and winglet structure on the performance of Cessna 172 Skyhawk aircraft with winglets variation design. Winglets improve efficiency by diffusing the shed wingtip vortex, which reducing the drag due to lift and improving the wingâs lift over drag ratio. In this research, the specimens are the duplicated of Cesnna 172 Skyhawk wing with 1:40 ratio made of balsa wood. There are three different winglet designs that are compared with the one without winglet. The experiments are conducted in an open wind tunnel to measure the lift and drag force with Reynold numbers of 25,000 and 33,000. It can be concluded that the wings with winglets have higher lift coefficient than wing without winglet for both Reynold numbers. It was also found that all wings with winglets have higher lift-to-drag ratio than wings without winglet where the blended 45o cant angle has the highest value.]]>
<![CDATA[Visualisasi Alat Musik Tradisional Gong Waning Menggunakan Animasi 3D ]]>
<![CDATA[Retnowati, Nurcahyani Dewi]]>;
<![CDATA[Nona, Kristina]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[Gong Waning is a traditional musical instrument o f Sikka community o f East Nusa Tenggara which is played by beating. In its development, not many young people who can play this instrument. Therefore it is very necessary to design and create an animated model o f the introduction of traditional Gong Waning musical instruments using 3Ds.Max and on sound using unity software. The output o f visualization o f traditional musical instrument Gong Waning in the form o f animation and sound display so hopefully can be more easily in studying and using musical instrument Gong Waning.]]>
<![CDATA[STUDI KELAYAKAN PEMBANGUNAN INSTALASI JARINGAN PIPA AIR DENGAN METODE COST & BENEFIT ANALYSIS GUNA MEMINIMALKAN WAKTU MATERIAL HANDLING ]]>
<![CDATA[Rengganis, Esa]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 1 (2016): Mei ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[Production facility have a significant influence on production process. CV. Jokudo Kamsa got a problem on water filling on rotary drum, it takes 120 minutes on tanning process. It causes the facility is not enough for this process. So, we need to build pipe installation to reduce material handling time, especially on water fillingâs time. Feasibility study on pipe installation based on Benefit Cost Analysis Methode. We applied NPV, Payback Period and Return On Investment. Based on data tabulation we found Rp. 84,787,387,75 on NPV, 74,87 percent on ROI and 5.23 months on PP. And the most important thing we can reduce material handling time in 70 minutes on water filling with material handling cost as big as Rp. 139,804,9.]]>
<![CDATA[PERANCANGAN PURWARUPA VERTICAL AXIS WIND TUBINE (VAWT) SKALA KECIL ]]>
<![CDATA[junaidin, buyung]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 2 (2017): November ]]>
Publisher : <![CDATA[Sekolah Tinggi Teknologi Adisutjipto ]]>
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<![CDATA[Konsumsi energi yang berasal dari bahan bakar fosil yang semakin tinggi dan ketersediannya di alam yang terbatas sehingga jumlahnya makin lama semakin berkurang, memaksa orang untuk mencari alternatif sumber energi lain. Energi angin menjadi salah satu energi alternatif yang penting dan diperhitungkan sejak adanya krisis energi dan isu lingkungan (polusi udara) akibat penggunaan bahan bakar fosil. Energi angin dimanfaatkan dengan cara mengubah gerakan angin menjadi energi listrik dengan turbin angin (wind turbine). Banyak turbin angin dengan skala besar yang telah dibuat atau dikembangkan di berbagai negara karena terbukti sangat efektif untuk menghasilkan energi listrik. Turbin angin skala kecil juga ikut dibuat dan dikembangkan hingga saat ini karena beberapa kelebihannya jika dibandingkan dengan turbin angin skala besar. Kelebihan itu diantaranya tidak terbatasnya daerah atau lokasi pemasangan turbin angin karena ukurannya yang kecil sehingga dapat ditempatkan di daerah seperti perkotaan. Untuk turbin angin skala kecil, jenis vertical axis wind turbine (vawt) sangatlah cocok digunakan di daerah perkotaan karena karakteristik VAWT yang dapat bergerak tanpa tergantung arah angin, hal ini sesuai dengan karakteristik angin perkotaan. Selain itu, VAWT dapat bergerak dan menghasilkan energi listrik pada kondisi kecepatan angin yang rendah. Penelitian ini fokus pada perancangan VAWT skala kecil yang dapat diaplikasikan pada kecepatan angin rendah dan berubah-ubah arah seperti karakteristik angin di perkotaan Indonesia serta analisis aerodinamika menggunakan metode double-multiple stream-tube (DMS).]]>
