International Conference on Telecommunication Systems, Services, and Applications 

About: International Conference on Telecommunication Systems, Services, and Applications is an academic conference. The conference publishes majorly in the area(s): The Internet & Microstrip antenna. Over the lifetime, 560 publications have been published by the conference receiving 2428 citations.

Blockchain based e-voting recording system design

Abstract: Increasingly digital technology in the present helped many people lives Unlike the electoral system, there are many conventional uses of paper in its implementation The aspect of security and transparency is a threat from still widespread election with the conventional system (offline) General elections still use a centralized system, there is one organization that manages it Some of the problems that can occur in traditional electoral systems is with an organization that has full control over the database and system, it is possible to tamper with the database of considerable opportunities Blockchain technology is one of solutions, because it embraces a decentralized system and the entire database are owned by many users Blockchain itself has been used in the Bitcoin system known as the decentralized Bank system By adopting blockchain in the distribution of databases on e-voting systems can reduce one of the cheating sources of database manipulation This research discusses the recording of voting result using blockchain algorithm from every place of election Unlike Bitcoin with its Proof of Work, this thesis proposed a method based on a predetermined turn on the system for each node in the built of blockchain

Degree centrality and eigenvector centrality in twitter

Abstract: Network formed between users in a social media can be used to encourage information spreading among them. This research applied Social Network Analysis which further can be used to social media marketing to improve the marketing process effectively. Based on previous research, information spreading speed among the social media is affected by the users' activity connection which can be represented in centrality value. The centrality value itself is very affected by the graph structure and weights. This research applied degree and eigenvector centrality to observe the effect of centrality value for twitter data. The result shows that there is significant difference among 10 most influential users. This result will be used for the future research that will be focused in small and medium enterprise (SME) twitter data.

GNU Radio based software-defined FMCW radar for weather surveillance application

Abstract: In this paper, a GNU Radio based software-defined FMCW (Frequency Modulated — Continuous Wave) radar is studied for weather surveillance application. The FMCW radar that has been gaining popularity due to the use of solid state microwave amplifier to generate a signal source is proposed for the design since the current weather surveillance radar is usually using a pulse-radar type that needs high power in pulse generation and high cost in the deployment. In addition, by using software-defined radar, therefore the designed FMCW radar can be implemented and configured at a reduced cost and complexity. The FMCW radar prototype is implemented using both open sources of software and hardware. The software part of the radar is realized using GNU Radio, whilst the hardware part is implemented using USRP (Universal Software Radio Peripheral) N210. Based on the design specification, an FMCW radar prototype based on GNU Radio is then realized and examined. From the performance-test, the prototype that works at a center frequency of 2.1GHz with a bandwidth of 750kHz is able to perform range detection of targets after utilizing the FFT (Fast Fourier Transform) function using MATLAB. In addition, the discussion of system design of software defined FMCW radar and performance-test of its prototype are presented.

Microstrip patch antenna miniaturization using artificial magnetic conductor

Abstract: This paper deals with an alternative technique for microstrip patch antenna miniaturization is investigated. The technique employs a 2 layer structures with an artificial magnetic conductor (AMC) structure used as the bottom layer replacing the ground plane. The AMC structure is constructed using a textured high impedance surface (HIS) that takes form of a doubly periodic square patches on top of a dielectric substrate. The miniaturization effect that is introduced especially in the reduction of patch size by use of this 2 layer structures will be numerically investigated. The proposed antenna is designed to have a resonant frequency of 2.45MHz suitable for wireless local area network (WLAN) application and is deployed on an FR-4 Epoxy substrate. To obtain the optimum design, numerical analysis is carried out using 3D simulation software. To verify the miniaturization effect, the proposed antenna will be compared to some reference antenna resonates at the same resonant frequency placed on a 2 layers FR-4 Epoxy substrate with the same thickness but without AMC structure. From the result, it is shown that the incorporation of AMC structure can reduce the size of antenna patch by more than 31%.

Architectural design of token based authentication of MQTT protocol in constrained IoT device

Abstract: An effective and secure authentication mechanism is one of the important part in implementation of communication protocol in a Internet of Things (IoT) based system. As one of the popular messaging protocol in IoT world, Message Queue Telemetry Transport (MQTT) offers a basic authentication using username and password. However, this authentication method might possibly have a problem in term of security and scalability. In this paper, we propose the design and implementation of token based authentication of MQTT protocol in constrained devices. The proposed design consists of four components : publisher, subscriber, MQTT broker and token authentication server. Publisher/subscriber first sends its username password to authentication server to get the token. Notice that, the token generating process is only performed at following conditions : 1) when token has not been generated yet and 2) when token has been expired. Once publisher get a valid token, it will store that token in its local storage and use it for further authentication. From usability and performance testing result, the proposed system can perform the authentication of valid and expired token in relatively acceptable time.