• Smart Structures and Systems
• /
• 제26권2호
• /
• pp.135-146
• /
• 2020

This paper deals with an application of adaptive blind source separation (BSS) method, equivariant adaptive separation via independence (EASI), and Teager Energy Operator (TEO) for online identification of structural modal parameters. The aim of adaptive BSS methods is recovering a set of independent sources from their unknown linear mixtures in each step when a new sample is received. In the proposed approach, firstly, the EASI method is used to decompose structural responses into independent sources at each instance. Secondly, the TEO based demodulation method with discrete energy separation algorithm (DESA-1) is applied to each independent source, and the instantaneous frequencies and damping ratios are extracted. The DESA-1 method can provide the fast time response and has high resolution so it is suitable for online problems. This paper also compares the performance of DESA-1 algorithm with Hilbert transform (HT) method. Compared to HT method, the DESA-1 method requires smaller amounts of samples to estimate and has a smaller computational complexity and faster adaption due to instantaneous characteristic. Furthermore, due to high resolution of the DESA-1 algorithm, it is very sensitive to noise and outliers. The effectiveness of the proposed approach has been validated using synthetic examples and a benchmark structure.

• 전기학회논문지
• /
• 제67권7호
• /
• pp.816-823
• /
• 2018

The Auto-synchronizer is essential equipment for synchronizing a generator to the power system. It is performing that measurement of the magnitude, frequency and phase of the voltage signal of the power system and generator. It is important to select the appropriate measurement algorithm for preventing various problem such as mechanical stress and Electrical problem. Teager Energy Operator(TEO) and Discrete separation algorithm(DESA) is measurable the instantaneous parameters of a sine wave using 5 samples and can be measured at a fast and with a simple operation. Therefore it has many advantages in measuring the parameters. In this paper, it confirmed measurement results using matlab simulations when there are synchronized in order of frequency, magnitude. Also it presented methods using digital filters and sample intervals to improve accuracy.

• 한국농촌건축학회논문집
• /
• 제7권2호
• /
• pp.56-63
• /
• 2005

This study is to provide basic research data of village composition and housing types of Central Java in Indonesia. So, I needed both field survey and research for 3 villages. I surveyed several houses cased on three village which located in two Desa of Salatica and one Desa of Purbowangi in rural area. The analysis of this research is divided into main categories as follow; The first is characteristics of village composition. And the second is classification of exterior form types and spatial composition of housing. Through this survey, the results of study are as follows. 1. The main elements of village compositions are public facilities, cross street including in naturalism, and shadow within high-rise tree. But it is not important to planning for orientation. 2. The types of house are 16 in all Indonesia land. But in this study 3 village are followed to Java style which has traditional roof style and clay tile material 지붕, 처마, conservation 3. Spatial composition of inner side is focused of living room-Ruang Tamu, and others are organized in small size. But recently new type of improved village house has rest room into living space.

• The Journal of Asian Finance, Economics and Business
• /
• 제8권2호
• /
• pp.1111-1124
• /
• 2021

This research aims to investigate The Role of Calling and Membership as Mediation on the Influence of Spiritual Leadership against Organizational Commitment and its Effect on the Performance of Lembaga Perkreditan Desa (LPD). This study has outlined organizational commitment as a construct thought to be theoretically strategic to empower organizations through calling and membership. The research was conducted upon LPDs in Bali. Inferential analysis techniques have been used to test the empirical model and the hypotheses proposed in this study. The analysis technique used is the structural equation model (SEM) based on variance or component, called Partial Least Square (PLS). The significant findings of this research are, first, spiritual leadership has a positive and significant effect on calling; second, calling has a positive and significant impact on organizational commitment; and third, calling has a positive and significant effect on organizational performance. Several studies have been conducted to estimate the mediating role of calling in explaining the relationship of spiritual leadership with organizational commitment. The results of the study by Bodla and Ali (2012) and Bodla et al. (2013) state that spiritual leadership, which consists of vision and altruistic love, has a positive and significant influence on organizational commitment. Likewise, spiritual leadership has a positive and significant effect on calling.

• 대한전기학회논문지:전력기술부문A
• /
• 제55권12호
• /
• pp.544-548
• /
• 2006

The instantaneous frequency gives a frequency value at a time instance. Thus, it is natural to use the instantaneous frequency for detecting disturbances of voltage signal in power line. Various instantaneous frequency estimators are introduced. By applying to different types of disturbed signals, we show the estimators' ability to classify flickers. Also, the computational costs are compared between different instantaneous frequency estimators. The Prony's method (PRONY) and the modified covariance method (MCOV) need relatively smaller amount of calculation than the Teaser-Kaiser energy operator based estimator (DESA II). For an AM-FM modulated signal, the tracking performance of different instantaneous frequency estimators is also compared. Through simulation, it is shown that MCOV produces less variant frequency estimation values than DESA II and PRONY method.

• Journal of Electrical Engineering and Technology
• /
• 제9권4호
• /
• pp.1210-1216
• /
• 2014

This paper deals with an application of Teager Energy Operator (TEO) and Energy Separation Algorithm(ESA) to detect and determine various voltage waveform distortions like harmonics, inter-harmonics and frequency variation. Because the TEO and DESA algorithm was initially proposed for speech or communication analysis, its applications are limited to some types of waveform in the power quality analysis area. For example, an undistorted voltage signal is similar with a pure sinusoid. A voltage fluctuation is very similar with an amplitude-modulated signal, from the viewpoint of signal theory. And a continuous frequency variation is similar with a frequency-modulated signal, which is also known as a chirp signal. This paper is written to show that the TEO and DESA algorithm can be used for detecting occurrences of the representative waveform distortions and determining their instantaneous information of amplitude and frequency.

• 수완나부미
• /
• 제15권1호
• /
• pp.229-254
• /
• 2023

This study observes the language attitude and maintenance of the border community in Telok Melano, Lundu (Sarawak, Malaysia) and Desa Temajuk, Sambas (West Kalimantan, Indonesia). The main objective of this study is to study the language attitudes of two cross-border community who shares the socio-cultural, language, and economic realms. The research data is collected qualitatively through conversation recordings, face-to-face interviews, and participant observations. In this preliminary study, twelve informants (six from Telok Melano and six from Desa Temajuk) were chosen based on the quota sampling method. The questions for the interview were set according to three characteristics of language choice proposed by Garvin and Mathiot (1968), namely language loyalty, language pride, and the awareness of norms. The result of this study indicates that language loyalty, language pride, and awareness of the norms towards the speakers' mother tongue and national language are relatively high. In terms of identity maintenance issues, this study found that the community in Telok Melano (Sarawak), originally identify themselves as "Sambas Malays," shifted to "Sarawak Malays" after the formation of Malaysia in 1963. This preliminary study serves as a basis for further research particularly on the complexity of issues concerned with the border communities in the Southwest of Sarawak.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2005년도 ICCAS
• /
• pp.49-51
• /
• 2005

Robot control involves advance programming, scientific and high technology. The systematic and methodological aspects of robot controls often results in having superficial control design problems that can negatively affect the robot application, usability and appeal. User friendly interface of robot control is extremely advantageous and more attractive. To illustrate, the application of medical robot is usually handled by clients who have little background in advance programming language. Thus, it would be difficult if the client needs to use programming language to control the robot. It would justify better if the robot control is presented in a meaningful interface to the client. This way the robot application would be more natural and user friendly. This paper describes the method of developing the user interface for web based communication to control an internet robot named Tarou. The web based communication tasks involves three levels. The first one accommodates on the client sending commands to robot through the internet. The next communication level relates to the robot receiving the commands sent by the client. The final communication level generates on sending feedback on status of commands by the robot to the client. The methodology used here can be elaborated in four hierarchical steps; identify user needs and robot tasks, identify the enhancing tag reference used by the server, induce the tag into HTML, present the HTML in attractive user interface as the client control panel.

• 한국농업기계학회:학술대회논문집
• /
• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
• /
• pp.458-468
• /
• 1996

The Oil Palm industry has developed tremendously with the increasing of planted area from 54,000 hectaresin 1960 to about 2.28 million hectares in 1995. This is expected to increase further to 2.5 million hectares by the year 2000. However, there has been an increasing difficulty in obtaining sufficient labour for the oil palm plantations. At present , harvesting of oil palm fresh fruit is facing an acute shortage of workforce as the workers are much more attracted to the better working environment and salary in the industrial sector. Harvesting of short palm is easily done by using a chisel attached to a short steel pole. Cutting is done by moving the tool at high speed to the target. The weight of the tool coupled with the speed of throwing will produce enough energy to cut the bunch stalk. In this cutting method, sharpness of the cutting device, weight of tool and the speed of throwing contribute to the efficiency of the tool . For the tall palms, a sickle attached to a ong pole is used and the job is more difficult compared to the short palms. Lifting of pole and cutting jobs require great effort and skills. This paper describes the basic design needs in developing an appropriate device that is practical for field use. A prototype design was developed and tested.

• Journal of Power Electronics
• /
• 제19권5호
• /
• pp.1074-1086
• /
• 2019

This paper presents the design and implementation of an improved cascaded multilevel inverter topology with asymmetric DC sources. This experimental inverter topology is a stand-alone system with simulations and experiments performed using resistance loads. The topology uses four asymmetric binary DC sources that are independent from each other and one H-bridge. The topology was simulated using PSIM software before an actual prototype circuit was tested. The proposed topology was shown to be very efficient. It was able to generate a smooth output waveform up to 31 levels with only eight switches. The obtained simulation and experimental results are almost identical. In a 1,200W ($48.3{\Omega}$) resistive load application, the THDv and efficiency of the topology were found to be 1.7% and 97%, respectively. In inductive load applications, the THDv values were 1.1% and 1.3% for an inductive load ($R=54{\Omega}$ dan L=146mH) and a 36W fluorescent lamp load with a capacitor connected at the dc bus.