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All Journal JIMAT (Jurnal Ilmiah Mahasiswa Akuntansi) Undiksha Jurnal ULTIMA Computing
Astawa, I Made
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Humanities Computer Science & IT Control & Systems Engineering Engineering Social Sciences

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PENGARUH KEPATUHAN STRUKTUR PENGENDALIAN INTERNAL TERHADAP EFISIENSI USAHA PADA KOPERASI SIMPAN PINJAM DI KECAMATAN TEGALLALANG Astawa, I Made; Yudantara, I Gede Agus Pertama; Julianto, I Putu
JIMAT (Jurnal Ilmiah Mahasiswa Akuntansi) Undiksha Vol 10, No 3 (2019)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jimat.v10i3.22807

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh antara lingkungan pengendalian, penaksiran risiko, informasi dan komunikasi, aktivitas pengendalian, dan pemantauan terhadap efisiensi usaha pada Koperasi Simpan Pinjam di Kecamatan Tegalalang. Data dikumpulkan melalui penyebaran kuesioner. Jumlah populasi dalam penelitian ini sebanyak 163 dengan menggunakan teknik purposive sampling diperoleh sampel sebanyak 34 sampel. Tingkat pengembalian kuesioner 100% yaitu sebanyak 34 responden. Teknik analisis data yang digunakan dalam penelitian ini adalah analisis regresi linier berganda dengan menggunakan SPSS versi 16.0. Hasil penelitian menunjukkan bahwa (1) Lingkungan Pengendalian dengan nilai probabilitas 0,00 lebih kecil dari 0,05 (2) Penaksiran dengan nilai probabilitas 0,04 lebih kecil dari 0,05, dan (3) Informasi dan Komunikasi dengan nilai probabilitas 0,00 lebih kecil dari 0,05, (4) Aktivitas Pengendalian dengan nilai probabilitas 0,02 lebih kecil dari 0,05, dan (5) Pemantauan nilai probabilitas 0,00 lebih kecil dari 0,05. Dapat disimpulkan bahwa semua variabel berpengaruh positif dan signifikan terhadap efisiensi usaha dengan variabel paling dominan yaitu pemantauan dilihat dari uji t yang memiliki nilai paling besar yaitu 8,247.
Analisis Data ADS-B untuk Menentukan Probability of Target Report pada Sistem A-SMGCS Astawa, I Made; Yogiswara, I Putu Ananta; Agastani, Tahar; Sarotama, Afrias
Ultima Computing : Jurnal Sistem Komputer Vol 11 No 1 (2019): ULTIMA Computing
Publisher : Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1652.867 KB) | DOI: 10.31937/sk.v11i1.1180

Abstract

A-SMGCS is an airport system that is used to improve the efficiency of using runways, apron and taxiways by maximizing runway capacities in all situations and weather while maintaining the required level of security. One of the parameters that becomes a requirement in the A-SMGCS system is the Probabillity of Target Report (PTR) whose value must be greater or equal to 95% in the area maneuver with update rate of the data one second [1]. Automatic Dependent SurveillanceBroadcast (ADS-B) is one of the cooperative sensors in the A-SMGCS system. The ADS-B sensor is a receiver that is used to capture ADS-B data from aircraft or vehicles equipped with ADS-B transmitters. The amount of ADSB data received by the ADS-B receiver and is needed for the A-SMGCS system is one of the factors that determine the Probability of Target Report (PTR). This paper will test three ADS-B receivers which will be selected for use as a cooperative sensor in the next A-SMGCS development. From the results of analysis and retrieval of data obtained by Radarcape ADS-B receiver more suitable for the development of the A-SMGCS system.
Metode Deteksi ‘Potential Security Threats’ Pada ADS-B Data dengan Memonitor EM Emisi Radiasi pada Jaringan Ethernet Septiawan, Reza; Astawa, I Made; Rufiyanto, Arief; Agastani, Tahar
Ultima Computing : Jurnal Sistem Komputer Vol 11 No 1 (2019): ULTIMA Computing
Publisher : Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1588.133 KB) | DOI: 10.31937/sk.v11i1.1181

Abstract

Precision, Navigation, and Timing (PNT) system based on Global Navigation Satellite System (GNSS) becomes significant in the air traffic management, especially in the use of Automatic Dependent Surveillance Broadcast system (ADS-B) for air traffic monitoring. Therefore the integrity of GNSS is significant to provide a reliable data necessary for ADS-B. GNSS Interference due to intentional or unintentional surrounding signal source may decrease the integrity of GNSS signal and therefore may result in the in-accurate position data of ADS-B message. ADS-B message itself is also vulnerable from potential security threats in their network. This paper proposed a methodology to detect potential security threats of ADS-B network system for both GNSS signal and ADS-B data by measuring and monitoring the electromagnetic radiated emission from ethernet cable IPv4 Cat5.
RANCANG BANGUN PROTOTIPE SISTEM MULTILATERATION 2-DIMENSI MENGGUNAKAN DATA ADS-B Astawa, I Made; Azhari, Siswayudi; Yogiswara, I Putu Ananta; Pinastiko, Widrianto Sih
Ultima Computing : Jurnal Sistem Komputer Vol 11 No 2 (2019): ULTIMA Computing
Publisher : Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1010.476 KB) | DOI: 10.31937/sk.v11i2.1265

Abstract

Multilateration (MLAT) is a technology used to determine the position of an object by using a Time Difference of Arrival (TDOA). MLAT is used at airports as one of the sensors in the A-SMGCS system to determine the position of an aircraft or vehicle. Developing an MLAT system should ideally be done at the airport because it requires aircraft and vehicle objects that are already equipped with ADS-B transmitters, but developing an MLAT system at the airport requires high costs for equipment installation and licensing because it risks disrupting airport operations and can disrupt existing systems . The Center of Technology for Electronics - BPPT is developing the A-SMGCS system and is based in the serpong puspiptek area, where this area has a large enough area, making it possible to design prototypes of the MLAT system. Three ADS-B receivers are placed in three different buildings that are still connected to a computer network, so that data collection from each receiver can be done through the BPPT local network. The object to be calculated is using a car equipped with an ADS-B transmitter. To get more accurate results, every time the receiver is synchronized using GPS. The experimental results show that there is a difference between the position data sent by the ADS-B transmitter and the results of the MLAT calculation, this is due to the difference in height of the three receivers, accuracy of GPS and accuracy of the ADS-B receiver timestamp used. Although there are differences, the proof of concept design of this system is in accordance with the characteristics of the MLAT system. The benefit gained from the design of this prototype is that it can develop an MLAT system in a place that is not high risk with low cost but the results can be applied at the airport.
Co-Authors Agastani, Tahar Azhari, Siswayudi I Putu Julianto, I Putu Pinastiko, Widrianto Sih Rufiyanto, Arief Sarotama, Afrias Septiawan, Reza Yogiswara, I Putu Ananta Yudantara, I Gede Agus Pertama