Telkom Institute of Technology

About: Telkom Institute of Technology is a based out in . It is known for research contribution in the topics: Computer science & Network packet. The organization has 570 authors who have published 470 publications receiving 1390 citations.

Deteksi Suhu Ruang Server dan Penggerak Kipas Berbasis Arduino Uno Dengan Report SMS

Abstract: Intisari---Suhu merupakan salah satu hal yang sangat berpengaruh terhadap kinerja perangkat keras khususnya ruang server. Ruang server adalah ruangan yang dapat digunakan untuk menyimpan data, perangkat jaringan dan operasional sistem. Deteksi suhu ruang server dirancang menggunakan 4 (empat) sensor LM35 yang berfungsi mendeteksi suhu didalam ruang server. Nilai suhu rata-rata ruang server ditampilkan pada LCD. Apabila suhu diruang server mengalami overheat, maka module GSM SIM900 akan mengirimkan informasi suhu ruang server ke administrator ruang server melalui sms. Perangkat deteksi suhu ruang server terdiri dari rangkaian catu daya, 4 (empat) sensor LM35, Arduino UNO, LCD, relay, kipas angin, module GSM dan handphone. Perangkat ini dapat monitoring suhu ruang server dan dapat memberikan informasi apabila suhu ruangan naik. Kipas angin berfungsi menormalkan suhu panas ruang server apabila suhu ruangan naik. Perangkat deteksi suhu pada ruang server ini mampu membantu administrator untuk memonitoring suhu ruang server dari jarak jauh dengan report SMS.Kata kunci--- Arduino Uno, Ruang Server, Sensor Suhu, GSM SIM900 Abstract---Temperature has a very influential impact on the performance of hardware, especially the one which is kept in a server room. The server room is a room that can be used to store data, network devices and operation systems. The detection system of server room’s temperature is designed by using 4 (four) LM35 sensors which functions is to detect the temperature in the server room. The value of average temperatures in the server room is displayed on the LCD. If the temperature in the server room reachs an overheated degree, the GSM SIM900 module will send the information about the temperature situation in the server room to the server room’s administrator by using an SMS. The server room’s temperature detection device consists of power supply circuits, 4 (four) LM35 sensors, Arduino UNO, LCD, relay, fan, GSM module and mobile phone. This device can monitor the temperature of the server room and can provide information when the room temperature rises. The fan’s function is to normalize the hot temperature in the server room when the room’s temperature rises above a certain degree. Temperature’s detection device in the server room is capable to help administrators to monitor the temperature of the server room remotely using an SMS report.Keywords--- Arduino Uno, Server Space, Temperature Sensors, GSM SIM900

Comparison analysis of passive repeater links prediction using methods: Barnett Vigants & ITU models

Abstract: Microwave is a kind of wireless communication using radio link transmission at high frequency medium between two base stations in cellular systems. Microwave link should be line of sight (LOS) between transmitter and receiver (no obstacle). But, in the real case, there are some obstacles in microwave link between two base stations. Therefore, this paper uses a microwave passive repeater to solve the obstacle problems. The passive repeater is used to repeat information signals by changing the direction of the radio link transmission. This paper implements Barnett Vigants and ITU-R P.530–7/8 methods in passive repeater using software simulation. The difference between two methods is the availability value due to multipath and unavailability value due to rain. On a microwave transmission network using the Barnett Vigants method, resulting higher unavailability value than the use of ITU-R method P.530 7/8. The unavailability value using Barnett Vigants method obtained was 0.023%, it means the outage time of link microwave is 7244 second per year. If compared with metode ITU-R P.530 7/8 method, the unavailability was 0.000087 % or outage time system is for 26 second per year. So the availability using ITU-R P.530 7/8 method is 99. 9999133%.

Dirac four-potential tunings-based quantum transistor utilizing the Lorentz force

Abstract: We propose a mathematical model of \textit{quantum} transistor in which bandgap engineering corresponds to the tuning of Dirac potential in the complex four-vector form. The transistor consists of $n$-relativistic spin qubits moving in \textit{classical} external electromagnetic fields. It is shown that the tuning of the direction of the external electromagnetic fields generates perturbation on the potential temporally and spatially, determining the type of quantum logic gates. The theory underlying of this scheme is on the proposal of the intertwining operator for Darboux transfomations on one-dimensional Dirac equation amalgamating the \textit{vector-quantum gates duality} of Pauli matrices. Simultaneous transformation of qubit and energy can be accomplished by setting the $\{\textit{control, cyclic}\}$-operators attached on the coupling between one-qubit quantum gate: the chose of \textit{cyclic}-operator swaps the qubit and energy simultaneously, while \textit{control}-operator ensures the energy conservation.

Optimation Free Space Optic (FSO) Design with Kim Model Using Space Diversity

Abstract: The development of communication services in remote rural areas is difficult to using cable-based systems such as DSL (Digital Subscriber Line) and FTTx. One solution to solve this problem is to use a wireless system such as radio communication. FSO (Free Space Optic) communication system is a better choice compared to radio communication because the flexibility of frequency usage. One of the problems of the FSO communication system is the range not too far. The range of the FSO can be increased by space diversity method. In this study compared FSO systems that not use space diversity and FSO systems that use space diversity in three weather conditions namely clear, haze and fog. In taking data results using Kim model propagation with variations in the range between 100 – 2000 meters. The modulation used in this study is external modulation. The result of analysis of FSO performance after adding space diversity, the range of FSO increases as far as 1200 meter when clear condition. When haze conditions, FSO range increase as far as 800 meters. During fog condition, FSO range has increased as far as 300 meters. By adding space diversity, Q-factor value has increased and BER (Bit Error Rate) has decreased.

Silhouette Density Canopy K-Means for Mapping the Quality of Education Based on the Results of the 2019 National Exam in Banyumas Regency

Abstract: Mapping the quality of education units is needed by stakeholders in education. To do this, clustering is considered as one of the methods that can be applied. K-means is a popular algorithm in the clustering method. In its process, K-means requires initial centroids randomly. Some scientists have proposed algorithms to determine the number of initial centroids and their location, one of which is density canopy (DC) algorithm. In the process, DC forms centroids based on the number of neighbors. This study proposes additional Silhouette criteria for DC algorithm. The development of DC is called Silhouette Density Canopy (SDC). SDC K-means (SDCKM) is applied to map the quality of education units and is compared with DC K-means (DCKM) and K-means (KM). The data used in this study originated from the 2019 senior high school national examination dataset of natural science, social science, and language programs in the Banyumas Regency. The results of the study revealed that clustering through SDKCM was better than DCKM and KM, but it took more time in the process. Mapping the quality of education with SDKCM formed three clusters for social science and natural science datasets and two clusters for language program dataset. Schools included in cluster 2 had a better quality of education compared to other schools.