The normal transformer lifespan can not be ascertained due to various causes, among others, the operating / different loading and ambient temperature factors. The life expectation of transformer will be achieved if distribution transformer is operated with continuously loaded at room temperature 20 °C and winding temperature 98 °C. The transformer which is operated in Indonesia with 30 °C room temperature will decrease thecapacity of the normal lifespan to 91%. From the calculation of loading, in accordance with the characteristics of thermal obtained from the transformer type test, althoug…
The increasing number of large induction motors use as production equipment is realized to lower the electric quality due to electric shock every time the motor are started directly to the grid. It will adversely affect the performance of production machines around them so it is necessary to overcome the electric shock technically. Whena large induction motoris started,it has highly inductive nature which indicates that a large reactive power is required. The severe electric shock can be avoided if the reactive power demand in the conductors can be compensated from outside of the system. The d…
High rise building is one of the objects that have the possibility of being struck by lightning considering geographical location of Indonesia which in equator, resulted in rainfall and intensity of lightning strikes is quite high. Hence it is important to protect high rise buildings with a reliable system such as Electric Field Lightning Protection System (E.F Lightning Protection System). This system is more active due to the addition of the charge induced lightning rod from the earth's surface. This protection system has 150,597.54 m2 wide protection area by E.F terminals. The 35mm2 con…
A surveillance system with motion detection feature is a designed system to define whether there’s movement on surveillance. This system uses Raspberry Pi and webcamera as devices, private network across the internet, and multi-level users management. This system compares every captured frame to do motion detecting and recording the only frames detected motion. An application is designed on server to differentiate accessing privilege for every registered users and user interface for monitoring and archive of recorded video. To connect the remote Raspberry Pi and the server, there’s a virtu…
Liquid insulation on high voltage equipment is used as the cooling medium of power equipment. If the applied voltage exceeds the dielectric strength of the insulation liquid, breakdown voltage will occur which signifies insulation failure. To identify the opportunity ofreutealistrisperma oil as an alternativetransformer oil, the breakdown voltage of the reutealistrisperma oil is tested. The test is based on the IEC 156:1995 standard which uses 50 mm half-ball half-sphere electrodes with 2.5 mm distance. The testing is also done for larger gap distance. The test results showed that as the dista…
Replacement of aluminum busbar into a copper busbar can be a solution to repair a squirrel cage rotor. Due to resistance value of copper is 2/3 smaller than the resistance of aluminum, the current density in copper busbar becomes smaller so that the increase in rotor temperature becomes lower. With the expansion rate of the copper busbar material is smaller then the heat rise in the bearings and rotor shaft becomes smaller so that friction and vibration motor becomes lower. The first step for the replacement of the aluminum to copper busbar rotor, starting with testing the damage busbar using …
An Inspection is a study of methods and techniques that can be suitably employed in practical applications. In this paper, a new activity is proposed and analysis framework to facilitate the inspection of an object using machine vision technique in which maximum efficiency can be achieved. By using LABVIEW software and vision builder software the quality of output images such as image compression, image restoration and multimedia streaming are achieved successfully. So the proposed design makes use of various image processing functions like special filters and classifiers to compute the optimu…
Widespread applications of random censoring in life testing experiments to estimate reliability of engineering products or systems are avialable. Different parametric statistical models such as exponential, Rayleigh, Weibull and Maxwell distributions are used under random censoring scheme. In this paper, random censoring under Pareto distribution is considered. The maximum likelihood estimators (MLE’s) of the model parameters and survival function were derived along with Fisher information matrix and asymptotic confidence intervals. A simulation study was performed to observe the behavi…
This paper deals with non-integer internal model control (FIMC) based proportional-integral-derivative(PID) design for load frequency control (LFC) of single area non-reheated thermal power system under parameter divergence and random load disturbance. Firstly, a fractional second order plus dead time(SOPDT) reduced system model is obtained using genetic algorithm through step error minimization. Secondly, a FIMC based PID controller is designed for single area power system based on reduced system model. Proposed controller is equipped with single area non-reheated thermal power system. The re…
We continue the study of the concepts of minimality and homogeneity in the fuzzy context. Concretely, we introduce two new notions of minimality in fuzzy bitopological spaces which are called minimal fuzzy open set and pairwise minimal fuzzy open set. Several relationships between such notions and a known one are given. Also, we provide results about the transformation of minimal, and pairwise minimal fuzzy open sets of a fuzzy bitopological space, via fuzzy continuous and fuzzy open mappings, and pairwise continuous and pairwise open mappings, respectively. Moreover, we present two new notion…
The paper addresses the reliability problem of mobile ad hoc networks under link and node failure model. Node reliability is calculated as a function of no. of neighbor nodes, packet success rate, and device type and packet size. The presence of a link between any node pair is binary and its reliability is computed considering the distance between nodes and signal-to-noise ratio (SNR). An efficient algorithm is proposed to analyze and calculate the reliability of mobile ad hoc networks considering multiple routes from source and destination nodes. The effect of different parameters on node rel…
This paper presents the implementation and evaluation of different convolutional neural network architectures focused on food segmentation. To perform this task, it is proposed the recognition of 6 categories, among which are the main food groups (protein, grains, fruit, vegetables) and two additional groups, rice and drink or juice. In addition, to make the recognition more complex, it is decided to test the networks with food dishes already started, i.e. during different moments, from its serving to its finishing, in order to verify the capability to see when there is no more food on the pla…
This paper discusses the prospect of integrating a novel type of low concentration photovoltaic (LCPV) design known as the rotationally asymmetrical compound parabolic concentrator (RACPC) in a building in the United Kingdom. This is done by proposing a number of building integration designs to create a zero carbon building. A cost reduction analysis of installing the LCPV systems in the country is also presented. It was found that an RACPC design could reduce the LCPV module’s manufacturing cost by 31.75% and the LCPV module’s cost per unit power output by 33.87% when compared w…
One of the hot research topics for the upcoming 5G (fifth-generation) wireless communication networks is the non orthogonal multiple access (NOMA) systems, where it have attracted both industrial and academic fields to improve the existing spectral efficiency. In fact, the multiuser detection process for NOMA systems is largely affected by the power distribution of the received signals. In this paper, a new method has been proposed to control the transmit power among active users in one of the promising NOMA systems; the interleave division multiple access (IDMA) which has been adopted here fo…
Compressor cell is often placed in critical path of multiplier circuits to perform partial product summation. Therefore it plays a significant role in determining the entire performance of multiplier and digital system. Respecting to the necessity of low power design for portable electronic, designing a low power and high performance compressors seems to be a good solution to overcome of these problems for computations. In this paper a novel high performance four-to-two compressor cell is proposed using Carbon Nanotube Field Effect Transistors (CNTFETs) technology. The new cell is based on Maj…
This paper proposes evaluation and classification classifier for static security evaluation (SSE) and classifica-tion. Data are generated on (30, 57, 118 and 300) bus IEEE test systems used to design the classifiers. The implementation decision tree methods on several IEEE test systems involved appropriateness SSE and classi-fication by using four algorithms of DT’s. Empirically, with the present of FSA, the implementation results indicate that these classifiers have the capability for system security evaluation and classification. Lastly, FSA is efficient and effective approach for rea…
Bahan bakar berbasis fosil untuk masa yang akan datang jumlahnya akan semakin menurun. Untukmengantisipasi hal tersebut diperlukan bahan baku lain yang sifatnya dapat diperbaharui yaitu biomasyang berasal dari tumbuhan. Biomas merupakan sumber energi terbarukan yang sifatnya serbagunakarena dapat menghasilkan bahan bakar untuk pemanas, listrik dan transportasi. Biomas dapat langsungdigunakan sebagai bahan bakar akan tetapi karena sifat fisiknya yang rendah seperti kerapatan massayang kecil dan permasalahan dalam penanganan, penyimpanan dan transportasinya sehingga perludilakukan upaya pemadata…
Kegiatan pengangkutan kayu memiliki tujuan untuk mengeluarkan kayu dari dalam hutan menuju industri pengolahan kayu atau langsung ke konsumen. Kegiatan tersebut membutuhkan waktu yang efisien sehingga kelancaran dalam pengangkutan harus diutamakan. Selip merupakan hambatan yang harus dihadapi saat mengangkut kayu menggunakan truk. Hal tersebut dapat mengurangi produktivitas kerja dan meningkatkan biaya pengangkutan kayu. Penelitian dilaksanakan pada bulan April 2014Â di wilayah RPH Ciogong, BKPH Tanggeung, KPH Cianjur Perum Perhutani Unit III Jawa Barat dan Banten. Tujuan penelitian untuk m…
Selama ini produksi rumah woloan hanya memakai beberapa jenis kayu saja, terutama jenis kayu besi (Instia bijuga), nyatoh (Palaquium spp.) dan cempaka (Elmerrillia ovalis). Pada kurun waktu sepuluh tahun terakhir, ketiga jenis kayu tersebut semakin sulit diperoleh sehingga volume produksi dan nilai ekspor rumah woloan pada sepuluh tahun terakhir telah mengalami penurunan yang signifikan. Produksi rumah woloan telah dicoba dengan bahan baku kayu kelapa, akan tetapi kesulitan memasarkannya karena kurang diminati oleh konsumen. Oleh karena itu diperlukan adanya jenis-jenis kayu lain yang dapat me…
The infestations of ambrosia beetle Platypus trepanatus Chap. (Coleoptera: Platypodidae)   on felled ramin trees (Gonystylus bancanus Kurz.) were studied in a logging area of West Kalimantan. Three felled ramin trees, d.b.h, approximately 25 cm, were prepared for the beetle infestations  on their felling sites for 20 days. Six sections of each trunk, each of 0.5 m length, which were consecutively arranged at intervals 2.0 m started from the basal, were observed. Number of th…