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Short message service (SMS) that has been widely used in various fields could potentially utilized for problem-solving consulting services that are based on expert system, so it takes a kind of application platform to implement this service. This paper proposes an expansion of online expert system services (web and wap based) by adding an application use SMS interface. Knowledge base of the expert...
In the age of 0–2 years, infants are introduced to foods. But parents could not give food carelessly because in this age infants are vulnerable to allergies. This condition causes parents to consider age and allergies in infant feeding. This application uses the forward chaining and backward chaining method to provide recommendations for infant nutrition in accordance with the age and allergies. The...
Clustering is one of the most popular methods in data mining. Many algorithms can be applied for data clustering with numeric or categorical attributes. However, most of data in the real world contain both numeric and categorical attributes. A clustering method which can be applied on attributes in mix types become important to handle the problem. K-prototypes algorithm is one of the algorithms which...
Small and Medium Enterprises (SMEs) in Indonesia need to enhance their ability to face a global market. E-commerce provides potential benefits for SMEs. This study proposed a number of Indonesian SMEs' e-commerce adoption levels and their ranks based on customer-oriented benefits. The levels and ranks are determined based k-means clustering. Analysis result shows that Indonesian SMEs can be classified...
This paper proposes a tracking mechanism to obtain the information sources that are stored on the personal knowledge organization which will be used to direct the search of information on the Internet by a software agent. Semantic representation of the organizer is viewed as a map of the information sources that are classified hierarchically based on the scopes of knowledge domains from the standpoint...
Decision support system using decision tree classification can be used for stock trading technical analysis. Technical analysis is a stock analysis method which solely based on interpreting stock's price chart movement or trend. Historical stock prices and volume are used as variable input. The system is built based on financial market technical analysis indicators (Exponential Moving Average, Moving...
Academic Information is very important for college students and should be conveyed to all students equally. But as is well known that a lot of students make the staff of college cannot convey information in a personal one by one on each student. In order to support good communication, synchronized, and quick to students. College facilitates through conventional media announcement. Academic Information...
A simple flooding mechanism for broadcasting messages over vehicular ad-hoc networks causes massive message redundancy, contention and collision known as the broadcast storm problem. Most available solutions to broadcast storm are normally based on the selection of the rebroadcast nodes depending on a given single attribute such as: sender-to-receiver distance, node density, vehicle's speed, movement...
The implementation of GIS based application is growing rapidly in many areas such as business, government, or public services. Potential implementation of a GIS-based application then applied to the mapping of conditions and irrigation building and canal. The application will display the latest information on the condition of each building irrigation in Rentang area, covering three districts namely...
English language is interesting for native speaker but there are many difficulties due to pronunciation. In order to facilitate for beginner to learn how to appropriately utter English word, we developed interactive learning program based on speech recognition. This paper investigates performance of three back-propagation neural network architectures with different hidden layers, e.g. 3, 4, and 5...
Development of information technology had significant contribution to the improvement in education field that is the emergence of e-Learning. As e-Learning implementation become a common practice and the imminent needs for open access toward high quality education become a vivid realization, thus arise a concept of Open Education. Open Education basically is an e-Learning, with core philosophy of...
In this paper has been studied about design and implementation of battery charging system. This system applied for buck-boost chopper as power transfer. A method to receive a maximum power from power to voltage curve in photovoltaic (PV) is called maximum power point tracker (MPPT). Incremental conductance (IC) current control method is used in MPPT which is derived from perturb and observed (P&O)...
Safe operation of elements of power systems plays a crucial role in maintaining the reliability and safety of the system. Transformers being a key element in power systems need to be maintained and monitored on a regular basis. Dissolved gas analysis has been used as a reliable tool in maintaining the safe operation of transformers for a long time. Analysis of dissolved gases is analytical and often...
The aim of optimal power flow is to discover an operating point that minimizes the generation cost while satisfying multiple operating constraints. Over the years, several techniques have been introduced to solve this non-linear optimization problem. In this paper, genetic algorithm deploying optimum non-uniform mutation rate and elitism has been used to solve this problem. After implementation of...
The 500KV substations are important for power system in Pakistan. They cover large area meeting the power requirement of whole power system. The ground grid system of substation has to be carefully analyzed in order to protect the grid, keep the system functional. A practical 500KV substation is chosen for this purpose i.e. RAWAT Grid Station. The grounding system of substation is studied in detail...
This paper considered maximum power extraction in wind turbines. However, the importance of constant power output of a wind turbine is increasing as the contribution of wind energy to the distribution network / grid grows. This may be considered as a guide of the future pitch angle control problems. The permanent magnetic synchrounous generator (PMSG) wind turbine variable pitch system is done through...
A photovoltaic (PV)-Grid System integrates electric energy generated by PV modules and a grid. A Maximum Power Point Tracker (MPPT) is required due to PV characteristic. It will force the PV modules produce maximum power in the DC voltage. It is needed an inverter to convert DC into AC voltage and to match the grid voltage. A standard inverter topology used in active filtering is functioned to inject...
The boost inverter is used to transforms a single step of DC voltage into an amplified AC voltage. The inverter is associated with a DC voltage source as the input, in order to create decentralized single phase AC electrical network. In order to control this inverter, the combination of proportional integrator (PI) and hysteresis controller is proposed, and has better performances compared to results...
A power system must be able to deliver the electric power even though some disturbance occurs. The failure of the protection system to localized fault can cause catastrophic failure of a system or blackout. In this research, an algorithm based on Monte Carlo simulations is proposed to obtain the reliability index that considers the overcurrent relay coordination varied by time settings of overcurrent...
Solar radiation is a source of alternative energy that is very influential on the photovoltaic performance in generating energy. The need for solar radiation estimation has become a significant feature in the design of photovoltaic (PV) systems. Recently, the most popular method used to estimate solar radiation is artificial neural network (ANN). However, a new approach, called the extreme learning...
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