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All Journal IAES International Journal of Artificial Intelligence (IJ-AI) Seminar Nasional Aplikasi Teknologi Informasi (SNATI) TELKOMNIKA (Telecommunication Computing Electronics and Control) PROSIDING CSGTEIS 2013 JURNAL ELEKTRO Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Journal Information System Development Jurnal Teknologi Informasi dan Pendidikan Diligentia: Journal of Theology and Christian Education Jurnal Pengabdian Masyarakat Asia
Hendra Tjahyadi
Universitas Pelita Harapan
Religion Arts Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Other

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Towards Adaptive Sensor-cloud for Internet of Things I Made Murwantara; Hendra Tjahyadi; Pujianto Yugopuspito; Arnold Aribowo; Irene A. Lazarusli
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 6: December 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i6.11557

Abstract

The emerge of the Internet of Things (IoT) data as a commodity to optimize public services such as Fishing Locator has made sensor-cloud an important object. When sensors that are members of multiple IoT gateways can inter-operate at the same time for more than one application, it will reduce cost to deploy IoT infrastructure. However, reliability has also developed as the most important aspect for real-time data collection that should be streamed constantly. Due to uncertainty factors sensors failure is potentially occurred, then an adaptive approach should be addressed into this as to guarantee the flow of streaming data. This paper proposed an adaptive sensor-cloud mechanism to manage the reliability by using a runtime model approach where a transition model and dynamic software product line engineering will take place to weaving the system. Our technique is comparable to other approaches and can be implemented in many types of Cloud-based services.
Perangkat Sistem Parkir Otomatis Berbasis Sistem Minimum Anton Yunus Timothy Adichandra; Hendra Tjahyadi; Arnold Aribowo
Seminar Nasional Aplikasi Teknologi Informasi (SNATI) 2015
Publisher : Jurusan Teknik Informatika, Fakultas Teknologi Industri, Universitas Islam Indonesia

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Abstract

Abstract— An automatic parking system miniature modeldesign and implementation is reported in this paper. The systemis a minimum based system using Near Field Communication(NFC) technology, and connected to a database server. Thesystem can be divided into two subsystems, namely a decision andcontrol system, and database server system. Furthermore, thedecision and control system can be divided into two elements: (i)Element 1 which consists of LCD module, NFC module, andEthernet module, and (ii) Element 2 which consists of LCDmodule and stepper motor driver module. The two elements areconnected through a wireless connection using XBee wirelessdevice. To implement the NFC feature, NFC Shield V2.0manufactured by Seed Studio is used. As an initial process, allNFC tags and cards are registered to the database server system.Then the parking process is starting with the detection of NFCtags or cards in Element 1 of the decision and control system.Based on the detection results and the results of querying thedatabase server a decision is then send to Element 2 that willmove the lift to the designated parking lot. In that sense, thesystem is able to allocate the parking space to its users who havethe registered card or tag. Freetronics EtherMega v3.0 is used asthe central processing unit for the system which is used forquerying the database and take actions based on that queryresults. An integrated Ethernet chip on EtherMega is used toconnect the decision and control system to the database serversystem, because the system can connect directly to the databaseserver. A computer that is usually needed to be the middle manfor procession queries is no longer needed. From a number oftests performed, the system works well and can achieve 100%allocation success rate. The system is able to allocate the parkinglot very well and to check whether the lot is occupied or free. Thesystem can also control the lift to move to the appropriate lot.Observed weakness is that the system’s stability is affected byheat generated by the system itself.Keywords—wireless, database, automatic parking, feedforward,RFID
Perancangan Sistem Pendeteksi Pencurian Bahan Bakar Kendaraan Berbasis Arduino Alfa Satya Putra; Jennifer Novia Nursalim; Arnold Aribowo; Hendra Tjahyadi
Jurnal Teknologi Informasi dan Pendidikan Vol 13 No 2 (2020): Jurnal Teknologi Informasi dan Pendidikan
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/tip.v13i2.340

Abstract

Fuel shortage is a common problem in Indonesia. This prompted many cases of vehicle fuel theft. As a solution to this problem, an Arduino-based vehicle fuel theft detector system is implemented. Arduino-based vehicle fuel theft detector system is a prototype that uses Arduino UNO as a microcontroller, IComSat v1.1 SIM900 GSM/GPRS Shield to communicate with mobile phone, fuel level sensor as a volume detector, and push button as a detector to check whether the fuel tank’s lid is open or closed. The working principle of this system is to detect the state of the fuel tank lid. When the lid is open, the system will make a phone call. Then, the system will keep track of fuel volume. If there is a drastic decrease in volume, the system will send information about the decreasing volume in the form of a short message to the owner of the vehicle. The success rate of the communication system between Arduino UNO and other electronic devices is 100%. Accuracy of fuel level sensor is 90%. Success rate of push button switch in detecting the state of fuel tank’s lid is 100%. Success rate of GSM Shield communication is 90%.
DESAIN DAN IMPLEMENTASI PATH FOLLOWING DRONE Fernaldy Julius; Alfa Satya Putra; Hendra Tjahyadi
Jurnal Elektro Vol 12 No 1 (2019): April 2019
Publisher : Prodi Teknik Elektro, Fakultas Teknik Unika Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (446.744 KB)

Abstract

Pada makalah ini dilakukan perancangan Drone yang dapat bergerak sendiri sesuai jalur yang sudah ditetapkan pada program komputer. Drone yang digunakan adalah Parrot AR. Drone 2.0. Drone memancarkan wifi dan komputer harus terkoneksi dengan wifi Drone untuk mengirimkan data jalur. Bahasa JavaScript dan library ar-drone digunakan untuk pemrograman Drone. Node.js digunakan untuk mengirim program dengan wifi Drone. Pengujian Drone dilakukan menggunakan jalur berbentuk segitiga dengan tiga skenario pengujian, dimana pada masing-masing skenario dilakukan lima kali pengujian. Pada skenario pertama, Drone bergerak di luar ruangan dan mendarat di titik akhir segitiga. Pada skenario kedua, Drone bergerak di luar ruangan dan mendarat di setiap titik segitiga. Pada skenario ketiga, Drone bergerak di dalam ruangan dan mendarat di titik akhir segitiga. Hasil pengujian menunjukkan Drone sudah dapat bergerak mengikuti jalur yang diberikan. Namun karena tidak adanya feedback pada sistem, Drone tidak dapat mendeteksi dan melakukan perbaikan posisi, sehingga mempengaruhi akurasi gerakan Drone. This paper discusses the design of an autonomous Drone that can follow a designated path from a computer program. The Drone used is Parrot AR. Drone 2.0. The Drone broadcasts wifi signal and the computer must connect to the Drone wifi in order to send the path data. JavaScript programming language and ar-drone library is used to program the Drone. Node.js is used to send the program using the Drone wifi. Drone testing is done by using a triangular path with three testing scenarios, and each scenario will be tested five times. In the first scenario, Drone moves outdoors and lands only on the finish point of the triangular path. In the second scenario, Drone moves outdoors and lands on each point of the triangular path. In the third scenario, Drone moves indoors and lands only on the finish point of the triangular path. Testing shows that Drone is able to follow the provided path. However, the lack of feedback in the system means the Drone is unable to detect and adjust its position, and this affects the accuracy of Drone’s movement.
Multiple Model Fuzzy Control: Rancangan dan Simulasi Pada Tower Crane Hendra Tjahyadi; Torang Simamora
PROSIDING CSGTEIS 2013 CSGTEIS 2013
Publisher : PROSIDING CSGTEIS 2013

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Abstract

Abstrak—Untuk meningkatkan performansi respon transientdari sistemtower crane yang memiliki tingkat non-linearitas danfaktor ketidakpastian yang tinggi, sebuah pengontrol yangmenggabungkan metoda multiple model dan logika fuzzy telahdirancang dan disimulasikan. Pada metoda ini plantdibandingkan dengan beberapa fuzzy model dalam sebuah bankmodel. Sebuah supervisor selanjutnya akanmengidentifikasimodel mana yang terdekat dengan kondisi dari plant pada saattersebut, dan akan mengaktifkan pengontrol yang terkait denganmodel yang terpilih sehingga responstransient yang cepat dapatdicapai. Simulasi pada sistem tower crane menunjukkan multiplemodel fuzzy control yang dirancang menghasilkan respon yanglebih baik dari fuzzy control konvensional yaitu menghasilkansimpangan beban yang lebih kecil.Keywords—multiple model; kontroller fuzzy; respon transient;tower crane, non-linear.
Pengembangan Sistem Komunikasi Nirkabel Untuk Mengendalikan Robot Sepak Bola Alfa Satya Putra; Arnold Aribowo; Hendra Tjahyadi
Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Vol 2 No 2 (2018): Agustus 2018
Publisher : Ikatan Ahli Informatika Indonesia (IAII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (923.028 KB) | DOI: 10.29207/resti.v2i2.347

Abstract

According to how soccer robot movement is controlled, approaches in soccer robot can be divided into two categories, namely centralized and decentralized. Centralized approach is an example of control over network concept where devices are controlled over the network. Each robot obtains information from a vision system outside the robot to detect the ball, and the central computer makes decision on which robot to approach and kick the ball. Wireless communication between robot and central computer must be reliable. One of the most important components in soccer robot is the ball kicking mechanism, which has to be able to kick the ball accurately. The wireless communication system is developed with a WeMos D1 microcontroller. Ball kicking mechanism is developed using solenoid circuit controlled by the microcontroller. Testing showed that wireless communication system has 100% reliability when operated in range up to 300cm. The ball kicking mechanism was able to respond accurately to ball kicking command when the robot is stationary and moving. When the robot is stationary, average kicking distance of the ball is 42.22cm and average tilt angle is 29.58°. When robot is moving, average kicking distance is 40.98cm and average tilt angle is 26.12°.
Peran Shepherd Leadership Guru Kristen Terhadap Pemuridan Generasi Z di SMA XYZ di Tangerang Selatan [The Role of Christian Teachers as Shepherd Leaders in Discipling the Z Generation of XYZ High School in South Tangerang] Ngatmiati Ngatmiati; Hendra Tjahyadi
Diligentia: Journal of Theology and Christian Education Vol 4, No 1 (2022): January
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/dil.v4i1.4036

Abstract

Generation Z in Indonesia is a demographic bonus that has an essential role in the future. They need to be prepared to face various challenges with strong faith and character. KTB (Growing Together Group) is an effective means to grow one’s spirituality and character. The role of the KTB leader as a shepherd leader is crucial in providing guidance, leadership, and exemplary in good relationships. This study aims to identify the important role of shepherd leadership for Christian teachers in effective discipleship for Generation Z at XYZ Senior High School in South Tangerang and demonstrates the significant impact of shepherd leadership on Christian teachers who make disciples of Generation Z. This study uses a case study model with a qualitative approach. Research subjects were conducted on 8 KTB leaders and 3 KTB members. The instruments used were interviews, FGDs, and document studies. This study indicates that the role of shepherd leadership for Christian teachers has a significant impact on the disciple mentorship of Generation Z to help them have strong faith in Christ, grow in character, and impact others through the talents that God has given.
SMARTBELL SEBAGAI APLIKASI IoT PADA SISTEM KEAMANAN RUMAH Dale Watson; Hendra Tjahyadi
Journal Information System Development (ISD) Vol 7 No 2 (2022): Journal Information System Development (ISD)
Publisher : UNIVERSITAS PELITA HARAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/isd.v7i2.550

Abstract

In this paper, a smart bell system is designed and realized. The system uses a passive-infrared sensor to detect motion and activate the system to logged detection time to database, sent notification, and command a webcam to take pictures and record video. An Arduino microcontroller is used to process data that will be presented on web pages which are then converted into Progressive Web Applications. Node.js is used as the platform to creare a server, and MongoDB is employed as database for time detection. For communication system protocol between the database and web application pages the REST-API method is used. During the detection process, the system will send a notification using webpush with the Firebase Cloud Messanging framework. The system was tested to detect, record videos, create GIFs, write to databases, and send notifications into web applications. The experiments shows a success of 81.25% for displaying videos and of 93.75% for displaying GIFs.
Detecting fraudulent financial statement under imbalanced data using neural network Tjahyadi, Hendra; Efraim Young, Yosua
IAES International Journal of Artificial Intelligence (IJ-AI) Vol 13, No 4: December 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijai.v13.i4.pp4106-4112

Abstract

In this paper a novel approach for detecting fraudulent financial statements by employing a combination of neural networks and synthetic minority over-sampling technique (SMOTE) is introduced. This approach is designed to tackle the problem of imbalanced datasets prevalent in fraudulent cases, which if left unaddressed will hinder the model to accurately identify fraud. Three neural network models, each representing different fraud predictors as the input layer: 28 inputs raw financial data; 14 inputs financial ratios data; and 42 inputs combination both raw financial and financial ratios data are developed. Experimental validation using established research datasets is conducted to assess the performance of the proposed method. Performance metrics, namely area under the curve (AUC), precision, and sensitivity, are used for evaluation, comparing the proposed model against existing benchmark models found in literature. Results indicate that the proposed model achieves an AUC score of 70.6% and a precision score of 2.89%, in comparable to the existing models, with a sensitivity score of 83% outperforming all counterparts. The high sensitivity rate of the proposed model underscores its practical utility for auditors and regulators, as it minimizes the risk of false negatives, thereby enhancing confidence in fraud detection.
Community Video Profiling using Generative AI: A Scenario-Based Practical Experience to Catholic Community in Serpong Utara Murwantara, I Made; Tjahyadi, Hendra; Yugopsupito, Pujianto; Andriyani
Jurnal Pengabdian Masyarakat Vol. 6 No. 2 (2025): Jurnal Pengabdian Masyarakat
Publisher : Institut Teknologi dan Bisnis Asia Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32815/jpm.v6i2.2769

Abstract

Purpose: The aim of this community service is to have a scenario-based practical use of Artificial Intelligence to enhance video profiling which ultimately to increase people engagement to their religious life. Method: The activity making use of a practical approach to design and develop a profiling video via short training and demonstration to encourage religious activity in providing tutorial own video using available AI tools. It uses children scenario to develop the narration. Practical Applications: Participants using the Generative AI tools to help them in enhancing the existing scenario into video narration. The time efficient video preparation with benefit and less experience is achieved by configuring the setting of the tool and engaging to the scenario. Conclusion: Generative AI has potential to enhance video generation for religious stewardship by providing reliable, less time and more creative in providing a way to achieve goals. In adopting AI tools to support video creation generation with scenario-based has convey into its portion to religious community.
Co-Authors Andriyani Anton Yunus Timothy Adichandra Arnold Aribowo Dale Watson Efraim Young, Yosua Fernaldy Julius I Made Murwantara Irene A. Lazarusli Jennifer Novia Nursalim Ngatmiati Ngatmiati Putra, Alfa Satya Torang Simamora Yugopsupito, Pujianto Yugopuspito, Pujianto