Tasikmalaya, Indonesia

Siliwangi University

Tasikmalaya, Indonesia
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Hiron N.,Siliwangi University | Andang A.,Siliwangi University
Proceeding - 2016 2nd International Conference on Science in Information Technology, ICSITech 2016: Information Science for Green Society and Environment | Year: 2016

Measurements of wind energy from rural areas play an important role in mapping the wind energy potential. It takes a reliable communication from sensor to server. Technique of wireless data transmission from the sensors are placed in rural areas to the server, often in trouble caused by the weather and the system so that it makes the data collected in the server becomes inaccurate, on the further condition, it is causes the lack of proper decision. This study focused on the implementation of the equation for the batching process as a fundamental coding program in the process of capture and transmission data captured from the sensors to the host node node. Communication performance testing occured on node to node (N2N) wireless communications. Data measurement variable are the wind speed, temperature and humidity. The distance between the sensor node and the server node at 100 meters. From this research, that the data generated are measured in one day from the sensor node was successfully changed in the form of 3 packages stored in the memory card is then sent to the host node. Results capture of sensor nodes during the day, which is placed in the environment of the University Siliwangi Tasikmalaya in West Java of Indonesia, to show that the highest wind speed is 5 (m/s) is at noon is 13:00 to 15:00, while the lowest rate is in the morning is 4:00 until 6:00. © 2016 IEEE.

Supriana I.,Bandung Institute of Technology | Surendro K.,Bandung Institute of Technology | Aradea,Siliwangi University | Ramadhan E.,University of Sriwijaya
4th IGNITE Conference and 2016 International Conference on Advanced Informatics: Concepts, Theory and Application, ICAICTA 2016 | Year: 2016

The trend in using information and communication technology as an engine of the current city management system has hypnotized various cities in the world, including Indonesia. Many terms appeared such as cyber city, smart city, intelligent city, or whatever it's called with the various developments of concepts that offer a wide range of sophistication and ease in managing any city needs. But behind the greatness of the proposed system, whether they are aware of how the characteristics of a city should be. In a city, there are so many diversities of the dynamic elements that make us must have an adaptive system to control it. This paper proposes an approach that has concern for the importance of adaptability to help the city management system. Two type of problems that become the main focus that make why the self-adaptive capability is important are deterministic and non-deterministic problems. The developed key strategy consists of two approaches. First, through series of modification for representing new problem space for solving a deterministic problem. Second, a non-deterministic problem is handled by a system that prepared automatically to search solution. The main objective of this paper is to depict a model to handle both types, through cyber city case illustration. © 2016 IEEE.

Sudiana I.N.,University of Indonesia | Mitsudo S.,University of Fukui | Firihu M.Z.,University of Indonesia | Aripin H.,Siliwangi University
Materials Science Forum | Year: 2016

Microwave processing of ceramics has attracted much research interest because of its significant advantages over the conventional one. Most researchers compared processes that occurred during the microwave and conventional heating at the same temperature and time. The enhancements found in the former method are indicated as a microwave effect which is usually used for explaining the phenomena in microwave processing. Numerous recent studies have been focused on the effect to elucidate the microwave interaction mechanism with materials. This paper will present effect of very high microwave frequency to hardness of sintered alumina. The sintering results were taken from a series of experiments to study the microwave effect on properties of alumina. Microwave sintering was performed by using the 300 GHz microwave sintering system. Some possible physical mechanisms are also discussed. © 2016 Trans Tech Publications, Switzerland.

Aripin H.,Siliwangi University | Mitsudo S.,University of Fukui | Sudiana I.N.,Haluoleo University | Priatna E.,Siliwangi University | Sabchevski S.,Bulgarian Academy of Science
AIP Conference Proceedings | Year: 2016

In this investigation, a new glass ceramics have been produced by mixing SnO2 and amorphous silica xerogel (ASX) extracted from sago waste ash. The composition has been prepared by adding 10 mol% of SnO2 into SX. The samples have been dry pressed and sintered in the temperature range between 800 °C and 1500 °C. The effects of temperature on the crystallization of silica xerogel after adding SnO2 and their relationship to bulk density have been studied. The crystallization process of the silica xerogel/SnO2 composite has been examined by an X-ray diffraction (XRD) and the bulk density has been characterized on the basis of the experimental data obtained using Archimedes′ principle. It has been found that an addition of SnO2 confers an appreciable effect on the grain and from the interpretation of XRD patterns allow one to explain the increase in the density by an increased crystallite size of SnO2 in the composite. © 2016 AIP Publishing LLC.

Pebriadi P.,Siliwangi University | Wuryandari A.I.,Bandung Institute of Technology | Setijadi P.A.,Bandung Institute of Technology
Proceedings of the 2013 Joint International Conference on Rural Information and Communication Technology and Electric-Vehicle Technology, rICT and ICEV-T 2013 | Year: 2013

Unemployment is one of the major problems in the world, especially in Indonesia. According to the national statistics agency, the number of unemployed in Indonesia in 2010-2012 to reach 8 million people. The low ability of people in the field of web and the availability of qualified teachers and the availability of professional staff time, as well as the lack of developers who create e-learning, especially the use of touch screen technology. NET Framework 4.5 on windows8, is one cause. But in this era, there are opportunities and industry information technology content. In Indonesia, the content industry is growing rapidly, increasing by 50% from 2011 to 2012 because of high demand from the public. To overcome that, we need an education automation, collaboration and community-based environmental and information technology fields. All that can be overcome with the application-based e-learning that iCode. This application will allow users to learn HTML5 anywhere and anytime, even they do not deal directly with the teacher, as represented by the video tutorial. Features of e-learning in the iCode, which users can learn HTML5 programming language, practice the source code (coding) while watching the video tutorials, the user can perform a challenge to test their understanding and generate the best value, the user can connect with teachers and other users through social media facebook. The results obtained after the application iCode, there is an increase in learning and motivation to learn the language HTML5 users where users are playing games during a. © 2013 IEEE.

Darmawan I.,Siliwangi University | Kuspriyanto,Bandung Institute of Technology | Priyana Y.,Bandung Institute of Technology | Joseph M.I.,Bandung Institute of Technology
2012 7th International Conference on Telecommunication Systems, Services, and Applications, TSSA 2012 | Year: 2012

Problems of scheduling jobs to some machine (Scheduling Jobs on Multiple Machines / SJMM) is one of the classical scheduling problems which can be found in the computing process, especially when done in a distributed computing. Several methods of solving problems has been developed both exact and heuristic approaches (metaheuristik). Tabu Search as one of a relatively new method of metaheuristik can be an alternative method to obtain the settlement approach to these problems. This method has been applied to combinatorial optimization problems, multi ekstermal optimization, and rare event simulation, with results that are optimal solution with a relatively short time. The purpose of this study to develop and implement a Tabu Search method combined with genetic algorithms (Integration Genetic-Tabu Search Algorithm / IGTS) in SJMM problems in computational grid. So that the integration of scheduling algorithms GA and TS can improve processing perpormance Job in grid computing environments. The method used is to include the excess Tabu Search algorithm which formed tabulist to be used in Genetic algorithms. Tabulist used to detect / store data in the process of forming a new population whose job is to detect repeated marriages between same Parent. Results obtained from the algorithm that is designed (IGTS) which serves to determine the allocation of the processing load on the cluster is the increased performance of some value which is quite satisfactory compared with not using tabulist include: makespan = 3.07%, the waiting time = 19.39%, and the number of generations / iterations is smaller. © 2012 IEEE.

Suwardi I.S.,Bandung Institute of Technology | Aradea,Siliwangi University
ICAICTA 2015 - 2015 International Conference on Advanced Informatics: Concepts, Theory and Applications | Year: 2015

Self-adaptive system is a system that can take proper action automatically to reach its goal, based on the situation which occur at this system environment to meet satisfactory of its users. This paper would illustrate a case about self-adaptation function requirement in application tools that correspond to the requirement of graphic element adjustment function. One of the problems that can arise are related to connectivity function graphic elements, wherein when graphic elements associated with other graphic elements, elements of the relationship between the graphic elements can occupy the working area irregularly, even if there are other graphic elements that block the path relations, the relation element can penetrate into that graphic element. This condition has to rearrange by a user manually, so it is quite difficult and time consuming. Strategy that needed to overcome that problems, which must guarantee the availability of areas as working environment, as well as the appropriate decision-making mechanisms when determining an alternative option to connect between elements graphic automatically as self-adaptation ability. The solution for this problem, we propose strategy to automate relation space management of graphic element, as a result of an adaptation mechanism which more flexible and simplify users to do the job. Core concept that developed consist of two approaches namely free space management and neighbourhood modeling. These both concepts realised to polish up adaptation ability from tools limitation that exists at the current time. © 2015 IEEE.

Rahmat B.,Siliwangi University | Hartoyo T.,Siliwangi University | Sunarya Y.,Siliwangi University
American Journal of Agricultural and Biological Science | Year: 2014

The Tofu Liquid Waste (TLW) as a pollution might be processed into biogas which was environmentally friendly and had potential to replace burning wood or oil. However, the waste could not directly be employed as the biogas substrate due to the high nitrogen content which was not suitable to the methanogen microorganism on the biogas digester and did not produce biogas. It was therefore necessary to adapt the carbon-nitrogen ratio in TLW with the addition of other organic materials that had a lower nitrogen content so it would be a suitable substrate for generating biogas. The research was aimed to evaluate the addition of the other organic material on the TLW to increase the biogas production. The results showed that TLW combined with sheep dung, cabbage waste, bamboo leaves and paddy straw respectively produced biogas as much as 14,183, 7,250, 2,400, 895 cm3 in 20 days. The 4 treatments gave the same quality of biogas, which was determined using the water boiling test. The pH fluctuation during the process was in the right pH for anaerobic digestion, thus it was not the limiting factor. © 2014 Science Publication.

Supratman,Siliwangi University | Ryane S.,Siliwangi University | Rustina R.,Siliwangi University
Journal of Physics: Conference Series | Year: 2016

This study aims to explore the extent to which the use of analogy reasoning when students conduct conjecture in developing the scientific approach, so that the knowledge of the students can be used to build new knowledge. Analysis was conducted on student learning outcomes in Ciamis district. Based on these results, it was found the teacher not give an opportunity to the students to make conjecture on the students in problem solving as well as the construction of new knowledge. Moreover, teachers do not take advantage of analogical reasoning and scientific approach in constructing new knowledge. © Published under licence by IOP Publishing Ltd.

Rahmat B.,Siliwangi University | Pangesti D.,Siliwangi University | Natawijaya D.,Siliwangi University | Sufyadi D.,Siliwangi University
BioResources | Year: 2014

Wood vinegar (WV) was obtained from charcoal production byproducts. The increase in demand for WV as an alternative pesticide requires more production of WV independent of conventional charcoal production. This research was intended to commence the production of WV from available furniture wood waste. The study included the following: (i) the preparation and performance of a pyrolysis kiln; and (ii) the application of the produced WV as a plant growth regulator of papaya plants in the nursery and as a pest insect repellent during maize storage. These experiments were arranged in a randomized block design. The observed variables included pyrolysis rate, the effect of WV on papaya growth in nursery, and the effect of WV in controlling infestation of maize weevils. The data were analyzed using analysis of variance and continued with Duncan's multiple difference test. The results showed that while the production of WV continuously occurred until the 90th min, the maximum (139 mL) was reached at the 10th min. Pyrolysis of 1,000 g of chips of wood-planer's waste yielded WV, tar, bio-oil, and char in quantities of 487.67 mL, 41.76 g, 2.93 mL, and 222 g respectively. The treatment using WV (50 mL/L) increased the diameter of papaya stems in the nursery. Mixing and fuming application of 5 mL of WV as a pest insect repellent on 200 g of maize on the storage could increase the number of the dead maize weevil and reduce the damage maize kernel.

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