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 350 Documents

14 15 16 17 18

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

PERANCANGAN SISTEM STANDARISASI DESA WISATA KABUPATEN BANTUL DENGAN MODEL SISTEM PENGUKURAN KINERJA BALANCED SCORECARD GUNA PENGUATAN INDUSTRI PARIWISATA DAERAH Yasrin Zabidi; Suhardiwamo Suhardiwamo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Bantul regency until now has approximately 36 villages wisata. Standarisasi tourist village needs to be done, which is the standard tourist village which is categorized as an embryo, develops, and advanced. These standards can be used by Disbudpar to determine work programs such as mentoring programs, counseling, training for rural tourism in the category or the developing embryo. One standardized assessment instrument is the assessment of performance against a tourist village. Therefore, in this study, researchers are trying to design a system of standardization of the tourist village of Bantul model performance measurement system balanced scorecard that includes the identification of performance criteria, strategic objectives, determining indicators of performance, the determination method / means of performance measurement precise, systematic and easy to use, as well as the design of performance reporting. The design activity in this study is divided into four phases, namely: the initial phase of the study and formulation of the problem, the design phase, the phase of analysis and conclusion phase. Early research phase and the formulation of the problem include the formulation of the problem and determine the research objectives. Design phase includes the design process performance measurement system with Balanced Scorecard method which includes the establishment of strategic objectives, the establishment of performance indicators (key performance indicators / KPIs), target setting and action plans, draft worksheet performance measurement methods Omax and draft reporting of performance-based website. Phase analysis includes analysis of balanced scorecard performance measurement system that includes analysis perspective, the analysis of strategic objectives, KPI analysis and analysis of the strategy map. Phase conclusions include conclusions from the findings and suggestions. From the research performance based on four perspectives of the balanced scorecard, namely financial, customer, internal business processes, learning and growth. Strategic objectives that form there are 10 and there are 24 KPI KPI formed. Besides of this study the formation worksheet Omax performance measurement method, so that can know the value of each performance indicator of performance and total performance in a particular period.

PEMANFAATAN TEKNOLOGI WEB SERVICE UNTUK INTEGRASI SISTEM LAYANAN MATERI PELAJARAN TERDISTRIBUSI Astika AyuningTyas; Ahmad Ashari
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 1 (2016): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

The program is implemented by the National Agency of Standardization Education (BSNP) in principle requires the student's participation in the information of various media, one of which comes from the Internet. The role of the school, especially teachers by providing a source material is also very necessary. The more resources available subject should be one of the student's notes of support factors. Digital training network creative services can be an effective learning tool. Digital materials services can be used to connect between the school as a hardware provider, so that information systems can be integrated with each other learning materials between schools and many resource materials obtained . While the data can be integrated materials between schools then use the Web service. Web services are built on a system of service providers that are in each school. The results of the use of Web services technology for systems integration services which are the subject of each school, with testing services that are built at the school system testing and information important that is accessible by the user, ie teachers, students, and office. The results of the study indicate a web service to solve problems by providing a lot of information distributed on the providers and users as needed.

PENGARUH RAPAT ARUS ANODIZING TERHADAP NILAI KEKERASAN PADA PLAT ALUMINIUM PADUAN AA SERI 2024-T3 Fajar Nugroho
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Aluminum alloy AA 2024-T3 is widely applied in the aircraft industry because it has good mechanical properties such as; light weight, good conductivity and the corrosion resistance. However Aluminium 2024-T3 susceptible to wearing. One method to improve the wear resistance o f AA 2024-T3 is the anodizing process. The aims of this research to study the effect of current density and anodizing time against the hardness of aluminum alloy AA 2024-T3. The process of anodizing was carried out using 10 percent sulfuric acid solution with the current density of 1.5 Ampere per decimeters square, 3.0 Ampere per decimeters square and 4.5 Ampere per decimeters square with immersion times of 30, 40, 50 and 60 minutes. Furthermore, the surface hardness was measured by using the Vickers hardness test method. As the supporting data the composition of the test conducted, testing the microstructure, and vickers hardness test. This study shows that the surface hardness of aluminum alloy AA 2024-T3 is influenced by the current density and anodizing time with varying values. Its shows that higher current density o f the anodizing caused optimal time tends to be short. The longer anodising time it will produce greater layer of aluminum oxide.

Safety Assessment hydraulic system Aircraft H-8 Cyrilus Sukoco Budiono
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 2 (2017): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

A hydraulic system is one of the secondary power used to drive the flight control surfaces, retract and extend landing gears, and to provide power to wheel brakes when the aircraft is on the ground. The failure of the hydraulic system results in aircraft lost of control which can lead to aircraft accident and passenger deaths. This journals discusses the safety assessment of the hydraulic system to be used in H-8 aircraft which includes the safety assessment process, regulations of the aircraft hydraulic system, the hydraulic system loads, and the aircraft hydraulic systems performance. The safety assessment begins with identification and classification of the functions, failure conditions, the effects of failure, and classify the failure conditions of the hydraulic system.

KLASIFIKASI SENTIMEN PADA TWITTER DENGAN NAIVE BAYES CLASSIFIER Sigit Suryono; Ema Utami; Emha Taufiq Luthfi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 1 (2018): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Klasifikasi sentimen merupakan salah satu cabang dari Text mining. Klasifikasi sentimen dapat menjadi sesuatu yang penting dalam proses evaluasi terhadap sebuah topik permasalahan. Tujuan utama dari klasifikasi sentimen adalah untuk mencari tahu polaritas dari sentimen positif, negatif dan netral. Klasifikasi sentimen salah satunya dapat diperoleh melalui tweet yang ada pada Twitter. Dalam tulisan ini, tweet yang berhubungan dengan kata kunci yang dicari dihimpun dengan menggunakan tools yaitu API Twitter. Data yang didapat dari proses penghimpunan akan diolah dengan menggunakan Natural Language Toolkit yang berjalan diatas bahasa pemrograman Python. Data selanjutnya akan dilakukan klasifikasi sentimen dengan menggunakan Naive Bayes untuk melihat sentimen yang dihasilkan. Dari proses klasifikasi yang telah dilakukan akan diukur tingkat akurasi. Dari hasil uji coba sebanyak 3 kali, didapatkan tingkat akurasi pada percobaan pertama 64.95%, kedua 66.36% dan ketiga 66.79% Hasil lain yang didapatkan dari proses klasifikasi yaitu Sentimen positif 28% sentimen negatif 20% dan sentimen netral 52%. Berdasarkan hasil persentase kelas sentimen, sentimen neutral merupakan sentimen yang paling banyak apabila dikaitkan dengan topik Presiden Joko Widodo dan Pemerintahannya.

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

ANALISIS PENINGKATAN KAPASITAS SISTEM SELULER 4G LTE PADA SISTEM KOMUNIKASI HIGH ALTITUDE PLATFORM STATION Catur Budi Waluyo; Yenni Astuti
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

In the development o f wireless communications, to provide high-speed data services and wide bandwidth become a challenge. One technique to make it happen is by using Multicarrier Orthogonal Frequency Division Multiplexing (OFDM) modulation, where in OFDM, frequency selective fading channel effect will be perceived flat fading by each subcarrier. One communication system that supports OFDM technology is Long Term Evolution (LTE) with various types of bandwidth configurations provided. To improve LTE performance in capacity building, coverage area and data rate, it can use multi antenna technique both in receiver and sender, and integrate with High altitude platform station (HAPs) system. In this study the estimation used is Linear Minimum Mean Square (LMMSE). The relationship o f the elevation angle and the K factor is directly proportional, but the elevation angle value is inversely proportional to the diameter o f the HAPs coverage area. In addition, the more the number o f used antennas, the greater the capacity served. Based on the simulation results, the system with estimation can be used to expand the coverage area to 215.77 km which is from 0.032 km in QPSK modulation, speed 60 kmpj with 2x2 antennas.

FILTER ADAPTIF GPS PADA SISTEM DOWNLINK DATA Agus Basukesti; Bangga Dirgantara Adiputra
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

GPS (Global Positioning System) is a system used for navigation and positioning with the help of 32 satellites that orbit the earth. GPS satellites emit radio waves to activate the GPS receiver on the Earth to determine the exact location, speed and time for all weather conditions. Currently, GPS has a vital role in navigation drone. However GPS have a lot of noise, it is necessary to overcome the noise filter on the GPS. In this research conducted a simulation of adaptive algorithm in extracting data from the GPS sensor. The method in this research is the Kalman Filter. From the identification and simulation can be concluded that the adaptive algorithm is designed to work well and need to be implemented on the downlink system. The simulation results showed that the error of algorithm has convergent properties are increasingly shrinking.

PENGARUH SUHU PREHEAT DAN VARIASI ARUS PADA HASIL LAS TIG ALUMINIUM PADUAN TERHADAP KEKUATAN TARIK DAN KEKERASAN Nurfi Ahmadi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 1 (2016): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Aluminium has a good nature; corrosion-resistant, lightweight, and able to be recycled. But the connection with welding aluminum is difficult to do so we need the right way this study aims to determine the characteristics of the results of weld aluminum with large variations in preheat temperature and current. Aluminum Alloy AA 3003 TIG welded with Filler ER 5356, a variation current 110 A, 130 A, 140 A and preheat temperature of 75 degree celcius, 125 degree celcius, 175 degree celcius, then welds tested tensile, hardness, and microstructure. The results showed that the variation o f the current 110 A with a preheat temperature of 175 degree C has the highest tensile strength and hardness.

Page 16 of 35 | Total Record : 350

14 15 16 17 18

Filter by Year

2015 2026

Filter By Issues

All Issue Vol 18, No 1 (2026): Februari Vol 17, No 2 (2025): November Vol 17, No 2 (2025) 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

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

Abstract

Abstract

Abstract

Abstract

Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kab. bantul,

Daerah istimewa yogyakarta

INDONESIA