Selo Sulistyo

• Universitas Gadjah Mada

In the rapidly growing and increasingly complex Internet of Things (IoT) ecosystem, securing communication and data exchanges between devices is a major concern. To address this, we proposed QS-Trust, a trust-based security model considering both Quality of Service (QoS) and social parameters. QS-Trust uses a trust value to determine the trust leve...

Li-Fi technology faces a critical challenge in achieving line-of-sight (LOS) connectivity while also optimizing bandwidth efficiency for high-speed data transmission. To address these issues, this research introduces a channel multiplexing model for Light Fidelity (Li-Fi) communication, employing movable LED panels. The study evaluates the model's...

A communication technology which enables the information exchanges between vehicles to support intelligent transportation system is the characteristic of vehicular ad hoc network (VANET). The vast applications of VANET including transportation safety, traffic management, and passenger amenities are also followed by some technical challenges. The ra...

Pandemi COVID-19 yang terjadi sejak Maret 2020 menyebabkan kegiatan pembelajaran harus dilakukan secara daring. Kegiatan pembelajaran secara daring umumnya dapat dilakukan dengan menggunakan learning management system (LMS) dan aplikasi video conference. Namun, dalam beberapa topik pelajaran dibutuhkan kegiatan praktikum, di antaranya praktikum men...

The level of participation of taxpayers, especially Start-ups in Indonesia, is still a relatively low, cause of the lack of understanding of taxation and administration. The purpose of designing the application is to be able to make sound financial governance such as recording transactions, calculating gross circulation every month and year, and he...

VANET has a dynamic topology that affects cluster formation stability. It influences vehicle’s network quality though supporting this stability requires a fast and small cluster formation process. It is necessary because of the rapidly changing condition of the vehicle's position. Moreover, small cluster groups make network quality more evenly dist...

In a vehicular ad hoc network (VANET), the nodes have very high mobility and hence, it is an important challenge to maintain the quality of communication. Due to the mobility, the vehicle nodes should perform handover from one infrastructure to another. Thus, the better quality of signal can be obtained. In vehicle to vehicle (V2V) communication, t...

Internet of Things (IoT) adalah teknologi yang sangat populer akhir-akhir ini di seluruh dunia, yang membantu meng-hubungkan objek-objek seperti sensor, kendaraan, instrumen rumah sakit, industri, dan peralatan rumah tangga melalui internet. Perangkat pintar yang ringkas merupakan bagian penting dari IoT. Perangkat ini beragam dalam penggunaan, uku...

Vehicular ad hoc network (VANET) is the emerging wireless communication technology in vehicular domain to support the safety and non-safety purposes in transportation. Despite the potential implementation of VANET, some challenges mainly due to the dynamic environment need to be addressed and tackled. In this paper, the horizontal handover especial...

The clustering method in the vehicular ad-hoc network provides an opportunity for a cluster head to improve the network connections, but it still remains a problem in the border cluster. The vehicles, in view of their position in the slices of two clusters, receive a weak signal from the cluster head. The intersection area causes a throughput decre...

Vehicular networking has a promising potential as a communication medium to relay the information related with the road safety, traffic efficiency and infotainment and thus many researches are conducted in this area. This research presents a study of multi-channel allocation in orthogonal frequency multiple access vehicular ad hoc network (VANET) u...

Clustering is considered as the potential approach for network management in vehicular ad hoc network (VANET). The performance of clustering is often assessed based on the stability of the clusters. Hence, most of the clustering methods aim to establish stable clusters. However, besides the stability of cluster, good link quality must be provided,...

Vehicle Ad-hoc Network (VANET) is a new technology in inter-vehicle communication. It has a dynamic topology which always changes in every time. A VANET's topology consists of many clusters and each cluster consist a cluster head. The dynamic topology can influence the cluster stability because the cluster head can always be changed. In a random si...

Group activities are an activity carried out together at the same time and place. In the office/university environment, they play a role in energy consumption. For this reason, the smart building needs group activity recognition (GAR) systems for electrical device control. Several studies on the GAR have been carried out in the outdoor environment,...

The Internet of Things (IoT) is widely affecting our daily lives in many different activities and applications. IoT devices are ranging from a tiny wearable device to large industrial applications. Wide variety of IoT applications have been developed and deployed involving many devices and produced huge data. In IoT applications, privacy, security,...

The level of participation of taxpayers, particularly Startups in Indonesia, is still low. According to Directorate General of Taxes, two things at least cause the low rate: first is the high turnover rate of Startup; second is the low rate of financial literacy, which correlates with tax administration. Consequently, having good financial governan...

With the fact that the tendency of startup business fail, it is necessary to understand factor influencing the startup success. It is understood that the lack of knowledge of how to start business creates uncertainty. The uncertainty may increase the likelihood of startup failure, which leads to economic loss. This paper aims to develop a predictiv...

Weather is very critical for aviation. Especially regarding safety in air transportation. Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) in its duties and functions provides aviation weather information, conducts the updated weather observation activities for the needs of takeoff and landing at airports. The World Meteorological Organization...

The industrial revolution 4.0 had profound impact on environment, human lifestyle, and the changes in the government service business model in Indonesia, including in Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) as an extension of the government in providing weather information to the public. Indonesia is an archipelago with geographical co...

The development of negative sites brings harm to users of the Internet, especially among teenagers. One way to block these sites is to provide a list of sites that are categorized as negative. However, the problem is that every day new sites appear that have not been listed yet. Therefore an intelligent system that can detect the content and can au...

Global warming has become an important problem because excessive energy use can increase CO2 emissions. Building control techniques for energy saving have been performed using conventional and scheduling methods. Although building controls have been based on user schedules, both methods have disadvantages due to device automation based on the maxim...

VANET (Vehicle Ad-Hoc Network) is one of the new technologies in the communication system. It supports inter-vehicle communication through the 802.11p. Many studies have looked at improving the quality of the communication system in VANET. Optimization and effectiveness issues in VANET are still open to exploration. Some researchers have used the n...

The environmental adaptability of the smart building is required for energy efficiency. The schedulingbased control model that widely implemented, have a user dependence and assumes maximum occupancy regardless of the occupant's desire in the energy usage requirement during the activity (i.e., ignoring user preferences). In this paper, we present o...

Human activity recognition (HAR) has an important role in various areas of research, including security, health, daily activity, elderly, energy consumption in the smart building, etc. Most survey papers on HAR discuss single activity recognition. This study explained the research survey on group activity recognition (GAR) and linked it to the adva...

This paper proposes transmission power control for vehicular ad hoc network (VANET) using fuzzy system. Despite the potential advantages of VANET especially for safety and intelligent transportation system, some challenges are discovered during the implementation of VANET. Main challenges emerge because of the dynamic environment and high mobility...

Security issue in Internet of Things (IoT) is one of the most important aspects to be resolved. Some attacks that occurred in Internet technology are also penetrated IoT. A trust-based security system is a promising solution in IoT as it is suitable for the characteristic of IoT which is distributed, decentralized control and on-off connections. Kn...

Securing objects in the Internet of Things (IoT) is essential. Authentication model is one candidate to secure an object, but it is only limited to handle a specific type of attack such as Sybil attack. The authentication model cannot handle other types of attack such as trust-based attacks. This paper proposed two-phase security protection for obj...

Vehicular Ad-Hoc Network (VANET) is a form of Peer-to-Peer (P2P) wireless communication between vehicles, which is characterized by the high mobility. In practice, VANET can be utilized to cater connections via multi-hop communication between vehicles to provide traffic information seamlessly, such as traffic jam and traffic accident, without the n...

This paper proposes a scheme of channel selection and transmission power adjustment in Vehicular Ad hoc Network (VANET) using game theoretic approach. The paradigm of VANET enables groups of vehicles to establish a mesh-like communication network. However, the mobility of vehicle, highly dynamic network environment, and the shared-spectrum concept...

Importance of power control is associated with distributed user characteristics, which is self-organized and non-cooperative in multi-channel cognitive femtocell network. Power control on Proposed PCG was based on the use of game theory method by generating a novel utility function that referred to the provision of solutions to the weakness of prev...

The objects connected to the Internet of Things require security. Security can do a variety of forms, ranging from data encryption to trust management mechanism. Privacy aspects can be improved through the process of trust assessment. Here privacy is improved using Diffie-Hellman key distribution and trust assessment to ensure only trusted things c...

In this world, there are areas, the villages that have not received the spread of messages (e.g. goverment's information) through Internet. For the villages that are be served by scheduled public transports systems at least once a day there is an opportunity to receive messages from the Internet. The public transports serve as relay nodes that carr...

Heating, ventilation and air conditioning (HVAC) is the largest source of energy consumption. In this research, we discuss cooling load in the room by considering the different heat source and the number of occupancy. Energy cooling load is affected by external and internal heat sources. External cooling load in this discussion include convection o...

Dynamic user in mobile communication encourages the implementation of self-organized and non-cooperative distributed power control. To be implemented, the power control must meet the feasible and convergent conditions. Feasibility of power control must be qualified for non-negative power vectors and the limit of maximum power, whereas convergence i...

The concept of the Internet of Things (IoT) enables physical objects or things to be virtually accessible for both consuming and providing services. Undue access from irresponsible activities becomes an interesting issue to address. Maintenance of data integrity and privacy of objects is important from the perspective of security. Privacy can be ac...

The need for an efficient transmit power is affected by the condition of user and power control methods used. User conditions that categorized in cognitive femtocell networks included in the category as distributed user, so it required a distributed power control (DPC). However, centralized power control (CPC) is also important, especially in the f...

This paper presents a comparison of Delay Tolerant Network (DTN) routing protocols in a realistic environment. This scenario is created by considering local map for vehicular network. The concept of this research conforms to actual conditions related to the lack of infrastructure or conditions that lead to malfunction of some infrastructure in the...

Internet of Things or widely known as IOT makes smart objects become active participants in the communication process between objects and their environment. IoT services that utilize Internet connection require solutions to a new problem: security and privacy. Smart objects and machine-to-machine communications in IOT now become interesting researc...

Internet of Things (IoT) brings a new paradigm of ‘talking’ sensors or objects with the help of the Internet. Important data from objects are sent for mining or processing purpose into critical information. Internet makes the data vulnerable to the threat of attacks, so some secure ways are needed to secure the data communications process. Restrict...

In dense deployment area of femtocell networks, interference becomes major problem normally decreasing signal to interference plus noise ratio (SINR) of connection between Femto User Equipment (FUE) and Femto Base Station (FBS). Thus, FUE must select appropriate FBS to get high SINR value in order for achieving high data rates. In this paper, we in...

p>Internet of Things or widely known as IOT makes smart objects become active participants in the communication process between objects and their environment. IoT services that utilize Internet connection require solutions to a new problem: security and privacy. Smart objects and machine-to-machine communications in IOT now become interesting resea...

The importance of power control feasibility is closely related to the direct implementation of femtocell technology, which is related to interference between users and to the optimal power usage to transmit which at the end it can save power and introduce a long-lasting battery. The power control feasibility study done in this paper is focused on a...

The popularity of Bus Rapid Transit (BRT) makes Trans Jogja an alternative of a mass public transportation system for urban mobility. However, without supervision on temporal patterns of passenger’s behavior in Trans Jogja on supply and demand, it will result in the decreases of the number of BRT users and the increasing number of private vehicle u...

span>The importance of power control feasibility is closely related to the direct implementation of the system, which is related to interference between users in the femtocell network and also related to the optimal use of power transmit that can create a long-lasting battery. Implementation of the feasibility of power control in this study is focu...

Abstrak── Penggunaan wireless sensor network (WSN) sebagai sensor kondisi lingkungan menggunakan sumber daya yang hemat dan efesiensi penerapan pada ruang publik. Intelligent Transportation System (ITS) memanfaatkan WSN dalam memonitoring kondisi lingkungan infrastruktur transportasi dalam memberikan kenyamanan dan keamanan bagi pengguna kendaraan....

Abstrak Persaingan yang ketat dalam lembaga keuangan, mengharuskan BMT (Baitul Maal Wat Tamwil) untuk mengelola nasabah secara maksimal. Mengetahui nasabah yang loyal akan membantu perusahaan menentukan strategi pemasaran yang tepat. Penelitian ini bertujuan untuk menentukan nasabah potensial, nasabah yang loyal kepada perusahaan. Nasabah potensial...

The importance of power control is related to the interference problem between users on the cognitive radio network. It also keeps the battery device remains durable. A completion method uses the algorithm feasible solution to the centralized power control by looking at the feasibility of power vector value. Feasible solution can be achieved if the...

This paper studies the feasible solution of power control for cognitive radio networks in the presence of primary user. The primary user (PUs) allows the secondary users (SUs) to spatially reuse the spectrum as long as they do not disrupt the communication of the former user. In addition, the primary user is willing to adjust its transmit power to...

Abstrak Enterprise Resource Planning (ERP) merupakan sebuah solusi terhadap proses manajemen bisnis karena menyediakan modul yang lengkap dan bisa langsung dipakai. Proses bisnis yang ditawarkan produk ERP terkadang tidak sesuai dengan proses bisnis perusahaan. Oleh karena itu, metode kustomisasi diperlukan untuk menambahkan, mengganti, atau mengur...

Abstrak-Enterprise Resource Planning (ERP) memiliki modul aplikasi yang bisa dikustomisasi. Modul aplikasi pada produk OpenERP dibangun dengan konsep Model-View-Controller (MVC). Komponen view pada konsep MVC, digunakan untuk merepresentasikan graphical user interface (GUI) dari aplikasi, yang pada umumnya dibentuk dari struktur eXtensible Markup L...

Museum is a potential environment to learn and play (edutainment). One of the opportunities for creating edutainment environment in terms of technology is to develop an augmented reality quiz game application. The characteristic of augmented reality is capable of combining real objects and virtual objects so it's different from regular quiz game ap...

Teknologi Augmented Reality (AR) memberikan peluang besar dalam ilmu sains dan teknik. AR juga berpeluang besar dalam dunia pendidikan, yaitu dapat menampilkan informasi tambahan berupa objek 3D, video, suara, dan teks pada suatu objek. Dengan kondisi ini, AR berpeluang dapat digunakan untuk mengembangkan media pembelajaran anatomi tubuh manusia. A...

In the present paper, a dynamic resource allocation scheme in orthogonal frequency-division multiple access (OFDMA) femtocells is proposed. In the proposed scheme, each femto base station dynamically selects the most appropriate subset of resource blocks (RBs) in a decentralized manner in order to mitigate the downlink cross- and co-tier interferen...

Currently, some information technology applications related to the traffic guidance of metropolitan city could only present the shortest route information, but the road density prediction was not informed. In this research, we proposed the model both to predict the road density and to inform the shortest cycle time of road. The methods of Turning P...