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Angkasa: Jurnal Ilmiah Bidang Teknologi
ISSN : 20859503     EISSN : 25811355     DOI : 10.28989/angkasa
Core Subject : Science,
Arjuna Subject : -
Articles 350 Documents
Algoritma Adaptif Sistem Downlink Menggunakan Recursive Least Square (RLS) Agus Basukesti; Bangga Dirgantara
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (99.46 KB) | DOI: 10.28989/angkasa.v9i1.106

Abstract

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.
PERANCANGAN AWAL SCALE MODEL GLIDER STTA-25-02_SAILPLANE Hendrix Novianto Firmansyah; Buyung Junaidin; M. Fatha Mauliadi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.432 KB) | DOI: 10.28989/angkasa.v8i2.122

Abstract

The knowledge and experience in aircraft design, especially for glider or sailplane are very important to have. Today, process of designing glider developed so rapidly, especially in America and Europe, one of the significant achievement is the performance aspect of glider. For example, the German-built Eta has a wingspan 30.78 m, aspect ratio 51 and wing loading 50.97 kg/m2, with glide angle of 0.8 degree and 3 km altitude, the glider able to fly 213 km in horizontal direction. Therefore, as the first step to understand the preliminary design of glider, it is important to start with designing a scale model glider STTA-25-02_Sailplane. The goals of this design are to get geometry and configuration of the glider, to obtained stability of glider and to gain performance data that meet with design requirements and objectives data (DR&O). The conclusions from the preliminary design of scale model glider STTA-25-02_Sailplane are the geometry and configuration are good, for example the achivement in performance, the minimum sink rate 0.52 m/s, the glide ratio more than 20 at a cruising speed over 13 m/s, stall speed 11.45 m/s at angle of attack 0 degree. In addition glider STTA-25-02_Sailplane has static and dynamic stability, the static stability condition is indicated by the value of trim angle is positive 1 degree, curve of Cma and Clfi has negative slope, Cnfi curve has positive slope. The dynamic stability condition is indicated by the eigen value for each mode o f movement are negative except on phugoid and spiral mode, eigen value for short period -5.7681 ± 7.0010, phugoid 0.0403 ± 1.1136, rool damping -32.6243, dutch roll -1.0468 ± 3.4891 and spiral 0.1467. Positive eigen value on phugoid and spiral mode can be solved by adding a control parameter of the controlsurfaces.
PERANCANGAN SISTEM PENDUKUNG KEPUTUSAN DALAM PENENTUAN JENIS TANAMAN PALAWIJA BERDASAR KANDUNGAN ZAT LAHAN GUNA MENINGKATKAN PRODUKTIVITAS LAHAN (STUDI KASUS DI KABUPATEN GUNUNGKIDUL) Yuliani Indrianingsih
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 1 (2016): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (174.179 KB) | DOI: 10.28989/angkasa.v8i1.138

Abstract

Penelitian ini bertujuan untuk memperbaiki produktivitas lahan, agar lahan dapat ditanami jenis palawija yang tepat berdasar kandungan zat lahan itu. Banyaknya masyarakat petani yang masih menggunakan pembelajaran secara otodidak dan pengalaman secara turun temurun dalam penentuan jenis tanaman palawija yang ditanam mereka, menyebabkan hasil panen yang tidak maksimal. Sehingga dibutuhkan sebuah Sistem Pendukung Keputusan (SPK) yang dapat membantu para petani untuk menentukan jenis tanaman palawija yang cocok berdasarkan kandungan zat atau unsur hara lahan yang akan diolah. Penelitian dilakukan di Kecamatan Paliyan, Saptosari dan Panggang di Kabupaten Gunungkidul untuk pengambilan data di lapangan, dan di instansi Sekolah Tinggi Teknologi Adisutjipto Yogyakarta yaitu di Laboratorium Komputasi untuk pengolahan datanya. Hasil dari pengambilan data di lapangan tersebut dapat menjadi tolak ukur bagi para pengambil keputusan petani untuk menentukan jenis tanaman palawija yang akan ditanam berdasarkan kriteria unsur hara lahan. Kriteria yang menjadi tolak ukur penentuan jenis tanaman palawija adalah Kapasitas Tukar Kation atau KTK, Kejenuhan Basa, O, Ca, C/N, Kalium, Magnesium, Carbon, Natrium, dan Calsium. Penentuan tingkat kepentingan masing-masing kriteria dan untuk menghitung nilai kesesuain jenis tanaman palawija berdasarkan masing-masing kriteria tersebut menggunakan metode ELECTRE. Berdasarkan teori yang ada dan kesesuaian data yang di lapangan, dalam penelitian ini menunjukkan bahwa metode ELECTRE dapat diimplementasikan dengan baik sebagai sistem pendukung keputusan yang dapat membantu menyelesaikan permasalahan penentuan jenis tanaman palawija yang akan ditanam guna meningkatkan produktivitas lahan. Hasil perhitungan manual maupun implementasi sistem menunjukkan Kecamatan Paliyan cocok ditanamai kedelai, Kecamatan Saptosari dan Panggang cocok ditanami jagung, karena struktur tanahnya sama. Dengan sistem yang dibangun ini, peran user yaitu petugas penyuluh pertanian dapat mengarahkan para petani untuk memilih jenis tanaman palawija yang sesuai dengan kandungan zat lahan, sehingga produktivitas lahan meningkat. Diharapkan, kedepannya hasil pertanian maksimal, sehingga nilai ekonomi dan kesejahteraan petani di wilayah Kabupaten Gunungkidul akan lebih baik dari sebelumnya.
ANALISIS BEBAN KERJA MENTAL PEKERJA BAGIAN GROUND H ANDLING BANDARA ADISUTJIPTO UNTUK MENDUKUNG KESELAMATAN PENERBANGAN Eko Poerwanto; Gunawan Gunawan
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.716 KB) | DOI: 10.28989/angkasa.v7i2.155

Abstract

Increased need for air transport will increase the activity of ground handling at airports. Increased activity of this will affect the mental workload received personnel who carry it out. Any increase in mental workload will affect the occurrence of human error and affect flight safety. Analysis of mental workload ofpart o f ground handling personnel is very important to ensure acceptable personnel workloads according to workload capacity available. This mental workload research using NASA-TLX method, that the procedure uses a multi-dimensional rating, and divide the workload on the basis of the average loading 6 dimensions, namely Mental Demand, Physical Demand, Temporal Demand, Effort, Own Performance, and frustation. NASA-TLX is divided into two phases, namely a comparison of each scale (Paired Comparison) and giving value to the work (Event Scoring). The research objective is to ensure the mental workload of part of ground handling Adisucipto airport in Yogyakarta, in accordance with their capacity, so as to avoid human error and to support aviation safety. The results showed that the mean score of mental workload ground handling activities by PT. Gapura Air and PT. Kokapura Avia in Yogyakarta Adisucipto airport in the mental workload optimization group, which indicates mental workload received by workers are safe (no overload).
ANALISIS POTENSI PANAS BUMI DENGAN METODE GEOMAGNET DI DAERAH GEDONG SONGO UNGARAN JAWA TENGAH fatimah fatimah
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 1 (2018): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2597.241 KB) | DOI: 10.28989/angkasa.v10i1.192

Abstract

Panas bumi adalah energi terbarukan dan berkelanjutan yang dapat digunakan untuk menggantikan energi fosil di masa depan. Energi panas bumi dapat digunakan, harus memenuhi sistem panas bumi, sistem panas bumi adalah istilah umum yang digunakan untuk membahas interaksi antara sistem batuan dengan suhu air yang tinggi. Indikasi sistem panas bumi biasanya ditandai dengan munculnya manifestasi permukaan, bisa termasuk sumber air panas, fumarol, kolam lumpur dan lain - lain. Kehadiran mata air panas dan fumarol di kawasan Gunung Ungaran merupakan indikasi kuat potensi panas bumi bawah permukaan. Penelitian ini dilakukan untuk mengetahui energi panas bumi di bawah permukaan dan membuat model sistem panas bumi berdasarkan analisis survei geologi, geokimia dan geomagnetik. Geologi Ungaran itu sendiri disusun oleh batuan vulkanik Tersier dari Miosen sampai Pleistosen, yang diduga sumber panas di Ungaran adalah sisa-sisa dari kaum muda Holosen Ungaran. Struktur di Ungaran dikendalikan oleh patahan yang mengarah ke barat daya - timur laut, yang merupakan bagian dari struktur keruntuhan, struktur ini diduga sebagai daerah pelepasan, sehingga cairan dan uap dari reservoir keluar melalui zona lemah dan muncul di permukaan. Dari peta Geomagnetik yang menunjukkan tingkat magnetik rendah berkisar antara -185 sampai -3,3 nT yang ditafsirkan sebagai sumber panas di Ungaran, setelah menggunakan penyaringan dengan distribusi perpanjangan ke atas sumber panas meluas ke utara Gedongsongo. 
PENGARUH KUALITAS SISTEM TERHADAP KEPUASAN PENGGUNA SISTEM KRS ON-LINE UNIVERSITAS AMIKOM YOGYAKARTA DENGAN KUALITAS INFORMASI DAN KEGUNAAN SEBAGAI MEDIATING VARIABEL Ruhamah Uma Uma
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 2 (2018): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3386.482 KB) | DOI: 10.28989/angkasa.v10i2.311

Abstract

Sistem Informasi KRS  On-line Universitas AMIKOM Yogyakarta merupakan sistem informasi akademis penunjang operasional layanan kemahasiswaan khususnya yang berhubungan dengan KRS, KHS dan transkip nilai mahasiswa.Penelitian ini dilakukan dengan menganalisis hasil kuesioner dari 100 responden dan instrumen yang digunakan adalah kuesioner dengan skala likert 5. Metode analisis data yang digunakan Structural Equation Model (SEM) dengan menggunakan software Amos 21 Penelitian ini bertujuan untuk mengukur tingkat kepuasaan mahasiswa sebagai pengguna sistem informasi KRS On-line dengan mengkaji faktor kualitas sistem, kualitas informasi, kegunaan yang dirasakan dan kepuasan mahasiswa, serta menggunakan variabel kualitas informasi dan kegunaan yang dirasakan sebagai variabel mediasi atau mediating variabel. Hasil analisis menunjukkan bahwa kualitas sistem tidak memiliki pengaruh signifikan terhadap kepuasaan pengguna dengan nilai p = 0.659. sementara kualitas sistem memiliki pengaruh signifikan terhadap kualitas informasi dengan nilai p = 0.00. Kualitas Informasi tidak memiliki pengaruh yang signifikan terhadap Kegunaan yang Dirasakan dengan nilai p = 0.11. Selanjutnya,  kualitas sistem tidak memiliki pengaruh yang signifikan terhadap kegunaan yang dirasakan dengan nilai p=0.16 tetapi memberikan pengaruhnya melalui kualitas informasi dengan pengaruh totalnya sebesar 0.703. Kualitas informasi tidak memiliki pengaruh yang signifikan terhadap kepuasaan pengguna dengan p=0.393 tetapi memberikan pengaruhnya melalui kegunaan yang dirasakan dengan pengaruh totalnya sebesar 0.383. 
PROMOTION SYSTEM FOR PROMOTIONAL PRODUCTS AND TOURIST OBJECT IN PATUK GUNUNGKIDUL DISTRICT Yuliani Indrianingsih; Astika Ayuningtyas; Uyuunul Mauidzoh
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 1 (2020): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3463.674 KB) | DOI: 10.28989/angkasa.v12i1.575

Abstract

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.
PENGARUH PENAMBAHAN NIKEL TERHADAP KEKUATAN TARIK DAN KEKERASAN PADA BESI TUANG NODULAR 50 Sudarmanto Sudarmanto
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (98.955 KB) | DOI: 10.28989/angkasa.v8i2.117

Abstract

Nodular cast iron is the cast iron that has nodular graphite spherical structure distributed in ferrite or pearlite matrix or in both of them. Recently, this material is used widely in industries because its low cost and better performance. The advanced metal industries nowadays have found some new technologies in order to improve the properties of materials. One of them is the addition of another elements into the base metals, such as nickel. The effects of the addition 1wt %, 2wt % and 3wt % nickel into nodular cast iron 50 on tensile and hardness properties were investigated in this study. The experimental results show that the best amount of nickel that added into nodular cast iron is 3% wt, which has the best tensile and hardness properties
ANALISIS ELEMEN HINGGA UNTUK FAKTOR KONSENTRASI TEGANGAN PADA PELAT ISOTROPIK BERLUBANG DENGAN PIN-LOADED Dwi Hartini
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 1 (2016): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (233.299 KB) | DOI: 10.28989/angkasa.v8i1.133

Abstract

Hole in the structure is often a serious problem, because the hole would trigger a surge in stress concentration which resulted cracks in the structure. In this research will analyze the stress concentration factor on isotropic plate with hole. The method used is numeric method. The technique used to collect data is the study of literature and comparative study of several similar research. Then the design is modeled and analyzed using Patran/Nastran. Based on this analysis the final result obtained is a mathematical equation that can be used to predict the stress concentration factor at the isotropic plate with hole where the results approached to Peterson distribution is used as reference in this research.
PENGGUNAAN WATER HEATING PADA MESIN PENGKONDISIAN UDARA SEBAGAI ALAT PENGENDALI KELEMBABAN UDARA DI DALAM RUANG OPERASI DI RUMAH SAKIT Wardoyo Wardoyo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (134.667 KB) | DOI: 10.28989/angkasa.v7i2.150

Abstract

This research was aimed to observe the performance of water heating as an air moisture controller device in a hospital surgery room. The way the research was outside air in 27 degrees until 30 degrees celcius and moisture of 60 until 70 percent made suitable with requirement conditions determined for surgery room in the hospital i.e. 19 until 24 degrees celcius and moisture of 45 until 60 percent. To make that condition, the surgery room was equipped with air conditioner machine and water heating as an air moisture controller device. Hot water was circulated in water heating and air moisture was measured by a hygrometer. Out of this research it obtained: measuring moisture value higher than theoretic moisture value. Calorie volume in water heating increased with water volume that was constant so that water heating could control air moisture. There was a suitability in an air moisture ratio and calorie volume in water heating so that air moisture in surgery room could be measured as requirements.