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A new mechanical structure for solar tracker was designed and presented. The structure implements two stepper motors for free rotation on X and Y axis. The rotation is intelligently controlled by a pre-programmed 2K microcontroller device PIC 18F4560 which provides simple programming strategy through C language. The designed algorithm is based on the measurement of intensity of solar radiation which...
In this work, a prototype of dye-sensitized solar cell using organic dye from blackberry and semiconductor TiO2 nanocrystals was studied. The cell was fabricated using materials locally obtained in Indonesia (except the transparent conducting oxide glass), and using technologies available in-house in laboratories in University of Pelita Harapan. The cell was tested in an own-constructed dark box by...
This paper is aimed to evaluate the effect of feedback delay on the performance of closed loop power control in CDMA System. Even though power control can mitigate the problem fluctuation due to fading, however due to the feedback delay, that advantage is invisible if this parameter is not decreased. Feedback delay is the total time that is taken by the power control from the mobile transmit signal...
This paper proposes a novel technique to do probabilistic inference by using simple Fuzzy logic System (FlS), especially ethnic information in DNA profile matching algorithm. By using the allele marker's distribution probability density function as the membership function in the FlS, the new technique makes it possible to tell the ethnic similarity between two DNA profiles in a fast and simple way...
Pattern Matching is the most conventional method of binary text image compression that has been only used in the 2-D domain of textual image signals. In this paper a pattern matching technique is proposed in the 1-D domain of chain code description signal of printed binary textual Farsi-Arabic images. In printed Farsi-Arabic scripts, contrary to latin scripts, letters usually attach to each other...
The old documents in Jawi script are being used widely for references. The hard copies of those scripts will deteriorate as time passes. Most of the previous works on Jawi documents focused on the character recognition and the accuracy of the algorithm was very much affected by noise. An effective preprocessing method is required to binarize degraded Jawi document. In this paper, a new technique to...
Compressive sensing is the recent technique in data acquisition that allows to reconstruct signal form far fewer samples than conventional method i.e. Shannon-Nyquist theorem use. In this paper, we compare ℓ1-minimization and Iteratively Reweighted least Squares (IRlS)-ℓp-minimization algorithm to reconstruct image from compressive measurement. Compressive measurement is done by using random Gaussian...
Gross Domestic Product (GDP) is a benchmark for economic production conditions of a country. Estimates of economic growth in the coming year in a country has important roles, among others as a benchmark in determining business plans for business entities, and the basis for devising government fiscal policy. Artificial Neural Network (ANN) has been increasingly recognized as a good forecasting tool...
An ad hoc network is a group of wireless mobile computers or nodes in which individual nodes cooperate by forwarding packets for each other to allow nodes to communicate beyond direct wireless transmission range. In this paper I presented the design and performance evaluation of a new on demand ad hoc routing protocol, called SWARM. SWARM used mechanisms of swarm intelligence to based select good...
Predicting revenue from tenants for an enterprise having several malls cannot be easily done using conventional approach, such as spreadsheet or manual calculations. Such an enterprise has abundant data yet inadequate resources to analyze such data. This paper presents the data mining method, namely the Artificial Neural Network (ANN), to predict the revenue based on the previous data. ANN can help...
Experimentations and performance analysis following designs and developments of energy efficient switchable distribution transformers are of first significant step as it reveals improvements, such as in energy efficiency, through the use of unique configurations and switching devices in the transformers. This paper explains a personal computer based application and hardware, using lab VIEW and a data...
This paper proposes an RGB-based, secure technique to maintain and authenticate the integrity of a document. The novel Steganographic algorithm that we have proposed has its strength greatly enhanced by use of hybrid cryptography on data that is to be hidden in cover image. The secret message is converted into two kinds of plaintexts by subsequent ASCII and binary conversions and suitable bit stuffing...
This paper presents the use of genetic algorithm in old document image enhancement and restoration. The term of `old document' is document coming from hundreds years ago. The purpose of the study is to preserve the information contained in old documents into a digital form, because the process to rescue the old images using physical approach is too slow. The main contribution of this study is in the...
The process industry needs to cope with permanently changing environments where sudden component failures can significantly influence the system performance if not treated in an appropriate amount of time. Agent-based manufacturing control systems are recognized as a promising technology that can handle such anomalies. However, current agent approaches are lacking real-time capabilities and solutions...
This paper presents application of GSM-SMS technology for real time data acquisition. The application is based on a field data collection prototype system that is composed of field monitoring and host control platforms. Advancement in technology has given rise to exploring ways of advancing control of devices beyond the environment in which it is been operated. This is the essence of this research...
Information Retrieval (IR) technology helps people to search relevant and necessary documents from massive digital database. In the context of e-law enforcement, it can be used to find verses related to a certain topic and presenting the relationship between one verse to the others. In this study we propose an intelligent searching system for Indonesian law documents which is enhanced by association...
As many experimental simulations were conducted in the field of wireless sensor networks, OMNeT++ has gained popularity due its scalability and rich graphical user interface. The use of OMNeTT++ based simulation for reliable point-to-point wireless transmission and realistic Segmentation and Reassembly (SAR) with error control for a distributed wireless sensor network are explored. Simulations demonstrated...
Several Operation Modes (OMs) guidelines and the related design are currently proposed by academicians and related organizations in informal way. However, the informal design has no verification method to analyze the design. This paper proposes a formal OMs-based design for automation systems by providing the template design modeled by using Colored Petri Net. Several analysis properties are considered,...
Karyotyping and chromosome analysis are very useful in biological applications, e.g. disease identification. The very first step of karyotyping is the identification of chromosome, starting from identifying its basic parts: chromatids, centromere, and bands. By successfully recognizing those parts on the analyzed chromosome, we can use some of the available imaging techniques to analyze the patterns...
Optimum Power gating sleep transistor design and implementation are critical to a successful low-power design. The large magnitude of supply and ground bounces, which arise from power mode transitions in large power gating structures results in wrong functioning of the circuit. We propose a novel power gating technique showing the trade-off between wake-up time and supply noise. This technique is...
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