Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

Angkasa: Jurnal Ilmiah Bidang Teknologi

Website

Published by Institut Teknologi Dirgantara Adisutjipto

ISSN : 20859503 EISSN : 25811355 DOI : 10.28989/angkasa

Core Subject : Science,

Computer Science & IT

Arjuna Subject : -

Articles 16 Documents

1 2

Search results for , issue "Vol 11, No 2 (2019): November" : 16 Documents clear

PERFORMANCE ANALYSIS OF DOPPLER SHIFT ON VEHICLE SPEED WITH JAKES MODEL Catur Budi Waluyo; Paulus Setiawan
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 2 (2019): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

The development of communication is increasing in the last decade, so that new infrastructure and technology emerge. The technology used to realize this time, is not only by using multi antenna technique, but also used orthogonal frequency division multiplexing (OFDM). But on systems that use OFDM will be sensitive to the effects of Doppler shifts and will result in inter carrier interference (ICI). To compensate for the influence of the Doppler shift on the HAPS communication system with ricean canals, a modified jakes model is needed. Based on the simulation, the ricean canal (HAPS communication system) has a small slope width so that it has characteristics close to LOS. The calculation of the Doppler shift in this study showed that the higher the speed, the greater the Doppler shift value while the greater the K factor, the smaller the Doppler shift value. So that the higher the K factor, the communication system is getting closer to LOS, the damping and noise values are getting smaller.

EXPLORING TRUST IN TSUNAMI EVACUATION DECISION: AN INITIAL STUDY Hilya Mudrika Arini
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 2 (2019): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

This initial study explores the importance of trust in Aceh tsunami evacuation. Drawing upon the cultural theory as theoretical basis, this research classifies people in Aceh based on their trust level and identifies the significant factors influencing them to trust to different sources during tsunami. To accomplish the goals, an offline survey to 62 respondents in Aceh who experienced tsunami was conducted. From this survey, it found that most of respondents tend to be more trust to their self (individualist) and family/neighbor (egalitarian) than trust to government (hierarchy) and religious leader (traditional). On the other hand, (1) self-efficacy, (2) evacuation knowledge and (3) trust level to non-government people are indicated as the significant factors influencing people to trust in different sources during tsunami evacuation. This initial result will be benefit to develop a predictive model of trust using Agent-based model and simulation (ABMS) for the further research.

INVENTORY PLANNING MANAGEMENT OF LOW PRESSURE FILTER WEB (LPFW) ON KT1-BEE AIRCRAFT BASED ON RELIABILITY COMPONENT IN SKATEK 043 Fajar Khanif Rahmawati
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 2 (2019): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Low pressure filter web (LPFW) is one of the components on KT1-Bee aircraft that has been damaged 18 times during March 2016 to April 2017. The LPFW damage that occurred must be anticipated by planning the inventory of components, so when the same damage happens, it can be replaced immediately. Life limit of LPFW by manufacturer is 375FH. However, from the calculation with the weibull method it showed the Mean Time Between Failure (MTBF) only reaches 347,248FH. MTBF values that are smaller than the life limit component require early inventory planning. Through the Poisson method with a confidence level of 70%, the value of x = 5 is obtained. Then if the value is calculated in the recommendation based on the passion distribution with x-1, it will reach 4. From these results, the recommendation of the number of LPFW spare parts that must be prepared to avoid unserviceable aircraft is 4ea.

THE ANALYSIS OF ACADEMIC INFORMATION SYSTEM IN DIRGANTARA MARSEKAL SURYADHARMA UNIVERSITY USING ISO/IEC 25010 Anugrah Septianto; Kemal Ade Sekarwati
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 2 (2019): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Dirgantara Marsekal Suryadarma University (Unsurya) needs to improve the information system for the students. So that it needs to do a software quality test in SIAKAD and to ensure the feature and the function run well. It has a goal to know the quality of a software by testing from functional suitability, performance efficiency, compatibility, security and maintainability standardized by ISO/IEC 25010. It is done to improve the quality of academic information system to be better. This research analyzed the software quality insurance of academic information system in Unsurya by testing the aspects from main menu such as transcript, study plan, lecturer’s evaluation of learning activity, the print out of exam card, the consultation of academic supervisor, consultation from Head of Study Program and student’s financial. Based on the suitability functional and efficiency performance testing using black box in Unsurya SIAKAD system, it runs well although some functions don’t work well. The result for compatibility in SIAKAD Unsurya, it works in line with the browser in the desktop or mobile. Based on the security test using audit system, it results the value 90 (B) with 1 medium risk and 9 low risk. Based on the maintainability test, it results SIAKAD which is able to give a system needed by the students.

ALGORITHM DEVELOPMENT FOR BREAK-EVEN ANALYSIS OF UNMANNED AERIAL VEHICLE Muhammad Ridlo Erdata Nasution; Dhaesa Pramana
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 2 (2019): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Break-Even Analysis is an important step to be considered in the design process of a product. In order to facilitate this cost analysis in the framework of unmanned aerial vehicle design, a numerical algorithm is proposed and implemented on an in-house software. The developed algorithm adopts the cost components of Modified DAPCA IV Cost Model. It aims to calculate the number of units to achieve Break-Even Point and its corresponding unit price, as well as the obtained profit margin. Three example cases are employed in the assessment of the outcomes of the proposed algorithm, whereby reasonable results and good agreements with theoretical trends are concluded.

IDENTIFIKASI STRUKTUR GEOLOGI DAN IMPLIKASINYA TERHADAP PENYEBARAN BATUAN FORMASI ANDESIT TUA – SENTOLO DI SUNGAI NITEN, GIRIPURWO, KULON PROGO AL HUSSEIN FLOWERS RIZQI
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 2 (2019): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Daerah penelitian termasuk dalam fisiografi Pegunungan Kulon Progo sebelah timur, tepatnya di Sungai Niten, Kecamatan Giripurwo, Kulon Progo, DIY. Penelitian ini bertujuan untuk mengidentifikasi struktur geologi dan hubungan stratigrafi Formasi Andesit Tua dan Formasi Sentolo. Metode penelitian meliputi pengamatan data struktur geologi meliputi data kekar dan sesar sedangkan data stratigrafi menggunakan metode pengukuran stratigrafi (MS) yang dilakukan di Formasi Andesit Tua bagian atas dan pada Formasi Sentolo bagian bawah. Berdasarkan hasil pengolahan data, sesar utama pada daerah penelitian adalah Right Slip Fault, dengan besaran rake yang didapat 5odan net slip N 340 oE. Bidang sesar utama memiliki arah dan kemiringan N 335o E / 55o. Arah gaya utama sesar diperoleh dari pembacaan (σ1) pada sesar utamayaitu didapatkan 50o, N 220oE,sesuai dengan arah umum extensional fracture yang berarah timurlaut – baratdaya. Pengaruh struktur geologi berupa sesar mendatar Mengkanan Niten, memotong satuan Breksi Andesit dan Batupasir Tufan karbonatan. Intepretasi pada peta geologi daerah penelitian terdapat offset pelamparan bukit di timur Sungai Niten. Offset bukit tersebut dikontrol oleh pergerakan Sesar Mendatar Mengkanan Niten. Hal itu didukung dengan sebaran satuan Breksi Andesit melampar hingga ke selatan di sebuah bukit kecil, sebelah timur Sungai Niten.

Page 2 of 2 | Total Record : 16

1 2

Filter by Year

2019 2019

Filter By Issues

All Issue Vol 18, No 1 (2026): Februari Vol 17, No 2 (2025) Vol 17, No 2 (2025): November Vol 17, No 1 (2025): Mei Vol 16, No 2 (2024): November Vol 16, No 1 (2024): Mei Vol 15, No 2 (2023): November Vol 15, No 1 (2023): Mei Vol 14, No 2 (2022): November Vol 14, No 1 (2022): Mei Vol 13, No 2 (2021): November Vol 13, No 1 (2021): Mei Vol 12, No 2 (2020): November Vol 12, No 1 (2020): Mei Vol 11, No 2 (2019): November Vol 11, No 1 (2019): Mei Vol 11, No 1 (2019): MEI Vol 10, No 2 (2018): November Vol 10, No 2 (2018): November Vol 10, No 1 (2018): Mei Vol 10, No 1 (2018): Mei Vol 9, No 2 (2017): November Vol 9, No 2 (2017): November Vol 9, No 1 (2017): Mei Vol 9, No 1 (2017): Mei Vol 8, No 2 (2016): November Vol 8, No 2 (2016): November Vol 8, No 1 (2016): Mei Vol 8, No 1 (2016): Mei Vol 7, No 2 (2015): November Vol 7, No 2 (2015): November More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kab. bantul,

Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name -

Contact Email -

Phone -

Journal Mail Official -

Editorial Address -

Location Kab. bantul, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kab. bantul,

Daerah istimewa yogyakarta

INDONESIA