Research Repository
The All Japan Indonesian Student Association
       Menu
      Home
      Register
      Login
      Search this site
      Data statistics
      Contact us

:: Publication - all records

Search by word Google search

Browse by category: Art (1) | Engineering (139) | Medical (43) | Science (85) | Social (14) | More..

Sort by Title Author

Page 1, data 1 to 10 of 210, displayed in 10 data per page
 NEXT >>  LAST

1.

Structural, electrical, and optical properties of CoxNi1-xO films grown by metalorganic chemical vapor deposition

Teuku Muhammad Roffi, Kazuo Uchida, Shinji Nozaki
Journal of Crystal Growth (2014)

Teuku Muhammad Roffi (4 records)

Abstract
Thin films of cobalt-nickel oxide (CoxNi1-xO, x=0.01, 0.02, 0.08, 0.17, 0.22, 0.35, 0.56, 0.72) were grown on Al2O3 substrate by atmospheric pressure metalorganic chemical vapor deposition (APMOCVD). The effect of the cobalt composition on the structural, morphological, optical, and electrical properties of the films was investigated. X-ray diffraction (XRD) analysis revealed that all of the films grew with a preferred orientation towards [1 1 1]NiO and a twinned structure. Cobalt was well dispersed in the NiO structure up to x=0.08. CoxNi1-xO alloys were formed from x=0.17 to x=0.22, while phase-separated NiO and CoxNi1−xO formed when x≥0.35. The bandgap of the CoxNi1−xO film was found to decrease with increasing cobalt composition. Four-point probe measurements showed that the resistivity of the film also decreased with increasing cobalt composition, reaching a minimum of 0.006 Ωcm. Hall measurements of the films revealed n-type conductivity. The correlation between the presence of cobalt in different ionization states and the observed decrease in resistivity as well as the type of conductivity in CoxNi1−xO is discussed.

Full article

 
2.

An Experimental Study on Confined RC Wall Boundary Regions under Uniaxial Monotonic and Cyclic Reversal Loadings

Eko Yuniarsyah, Rafik Taleb, Susumu Kono, Masanori Tani
The 16th Japan-Korea-Taiwan Joint Seminar on Earthquake Engineering for Building structures (SEEBUS) (2014)

Eko Yuniarsyah (2 records)

Abstract
The aim of this paper is to present the experimental results on eight RC elements with a rectangular section representing wall boundary regions tested under uniaxial monotonic and cyclic reversal loadings. All specimens were constructed with the same cross-sectional dimensions but had varying transverse reinforcement spacing, number of cross-ties, and its diameter. The main purpose of the experimental tests was to investigate the effects of reinforcement detailing and loading history on axial load capacities and failure modes. It was found that the lack of closely spaced transverse reinforcement caused buckling of longitudinal reinforcement. Moreover, a compression zone could not be sustained and spread of concrete crushing by confined core concrete could not be ensured. A limit on the maximum spacing of transverse reinforcement and the minimum number of ties should be considered to improve confinement and to provide the lateral support of longitudinal bars.

Full article

 
3.

The development of a remote fish finder system for set-net fishery

Masaaki Wada, Shigeya Yasui, Ramadhona Saville, Katsumori Hatanaka
IEEE OCEANS St Johns 2014 (2014)

Ramadhona Saville (5 records)

Abstract
A remote fish finder system for effective set-net fishery, which enable to visualize as well as recognize catch amount and the fish kind, is proposed in this paper. In order to improve fishing efficiency and obtain the highest possible profit of set-net fishery, set-net monitoring is needed by coastal fishermen. Set-net monitoring can be used to estimate fish catch amount within the set-net, fish kind trapped or to estimate the adequate timing to lift the set-net. Set-net monitoring has been practiced for several decades using conventional equipment. However, the equipment has many weaknesses, namely, high priced, large sized, troublesome maintenance and poor data record (paper based data record). This study aimed to develop a remote fish finder system for set-net monitoring to meet those problems. The development of remote fish finder system is based on a floating echo sounder for data acquisition, a cloud server for data storage, and an iPad application for data display. The experiment for this study has been conducted from June 28 until December 25, 2013 in two experimental sites in Hakodate, Hokkaido, Japan. The algorithm development for estimations in this study was based on empirical estimation of fishermen when they observed the printed-out sounder reflection data. The empirical estimation was practiced by observing the intensity of signs of fish in certain depth. Statistics of reflection data in several layers depth during sunrise were used as indicators to estimate. Catch amount within set-net could be estimated through multiple regression analysis, while fish kind classification was through linear discriminant analysis. The results of catch estimation via multiple regression analysis has been obtained with multiple R 2 = 0.89. Yet, single dominant fish kind could be estimated better than bycatch using this algorithm. On the other hand, fish kind within set-net could be classified with 83% of correctness. In order to improve the accuracy, the data sampling must be continued at least a whole fishing season.

Full article

 
4.

Marine Observation Framework Using ICT for Mariculture in Indonesia

Wada, Masaaki, Katsumori Hatanaka, Ramadhona Saville, I. Nyoman Radiarta, and Ketut Sugama
IEEE, Oceans - San Diego, 2013 (2013)

Ramadhona Saville (5 records)

Abstract
According to The State of World Fisheries and Aquaculture 2012, a publication of the Food and Agriculture Organization of the United Nations, five Asian nations topped the world ranking of mariculture producers in 2010. In order, they were China, India, Vietnam, Indonesia, and Bangladesh. Asia’s maricultural production was 1,799,101 tons in 1970, accounting for 70.1% of the world total. Since then, maricultural production in Asia has continued to grow as a percentage of the world total year by year. In 2010, Asian production reached 53,301,157 tons, about 30 times the 1970 level and 89.0% of global production. World production by maricultural environment shows that about 62.0% comes from freshwater, 7.9% from brackish water, and 30.1% from seawater. Since 2000, the trend is for freshwater production to increase slightly and seawater production to decline slightly. Given this background, promoting mariculture to expand exports of fish and shellfish is a key issue of national development plans in Indonesia, the world’s fourth largest maricultural producer. However, maricultural technology is still in the development stage, and production is not stable, plagued as it is with problems like sudden, large-scale die-offs. Maricultural technology can be broadly divided into egg and hatchling production technology and cultivating technology. In Indonesia, egg and hatchling production technology has been under development for high-added-value milkfish and grouper through the “Project for Development of Egg and Hatchling Production Technology for Many Species,” begun in 1994. Since 2003, organizations such as a national maricultural research center have been transferring that technology to the private sector. On the other hand, cultivating technology, which concerns raising fish from juvenile to adult stages, is still under development. Here, one issue is the establishment of maricultural technology that enables stable production immune to regime shifts. The authors have begun the observation of the marine environment to establish maricultural technology in Indonesia with the objective of enabling stable production and distribution of safe and reliable fish and shellfish into the future.

Full article

 
5.

Computational Fluid Dynamics Study on Cross Flow Pressure Drop for Triangular Array Rod Assemblies with Wire

Syeilendra Pramuditya, Minoru Takahashi, and Hisashi Ninokata
Annals of Nuclear Energy (2014)

Syeilendra Pramuditya (9 records)

Abstract
A numerical study on modeling of cross flow pressure drop coefficient for wire-wrapped triangular rod array has been performed. The objective is to clarify and also to extend the current modeling of cross flow pressure drop coefficient employed in subchannel analysis method. This study includes both pure laminar and fully turbulent flow conditions. Firstly, simulations employing pin pitch to diameter ratio (P/D) of 1.21 are carried out, and the results are compared with available experimental data in terms of wire correction parameter. The results for P/D = 1.21 are in good agreement with experimental data. Calculations employing smaller values of P/D, representing tight lattice rod configuration, have also been carried out. Based on the numerical results, new correlations of cross flow pressure drop are proposed. The correlations can be used to evaluate cross flow pressure drop coefficient in subchannel analysis codes.

Full article

 
6.

SUPEL Scenario for PWR Spent Fuel Direct Recycling Scheme

Abdul Waris, Syeilendra Pramuditya, Indarta Kuncoro Aji, Rahadi Wirawan, Nuha
Applied Mechanics and Materials (2014)

Syeilendra Pramuditya (9 records)

Abstract
Study on SUPEL (Straight Utilization of sPEnt LWR fuel in LWR system) scenario for PWR spent fuel direct recycling scheme has been performed. Several spent PWR fuel compositions in loaded fuel has been investigated to achive the criticality of reactor. The reactor can obtain it criticality for 4.5 a% of UO2 enrichment with at maximum 8.0 a% of spent fuel fraction in loaded fuel. The neutron spectra become harder with the raising of UO2 enrichment in the loaded fresh fuel as well as the increasing of the fraction of spent fuel in the core.

Full article

 
7.

Solving Combined Economic and Emission Dispatch Using Harvest Season Artificial Bee Colony Algorithm Considering Food Source Placements and Modified Rates

A.N. Afandi
IJEEI, Vol. 6, No.6 (2014)

A.N. AFANDI (12 records)

Abstract
This paper presents performances of a harvest season artificial bee colony (HSABC) algorithm for obtaining the best solution of a combined economic and emission dispatch (CEED). Two strategies of placement are applied to IEEE-30 bus system for solving the CEED problem under some constraints. Modified rates and various distances are also used to demonstrate HSABC’s performances. Simulation results show that two placement strategies have different implications for the CEED, application of various modified rates and distances affect to convergence speeds, minimum results are searched in different starting points at the first iteration and the total number of food sources gives effects to the HSABC’s performances

Full article

 
8.

Emission Standard Effects on CEED Problems Considering Dominant Penalty Factors

A.N. Afandi
ICEE 2014, South Korea (2014)

A.N. AFANDI (12 records)

Abstract
Since the economic power system operation (EPSO) is concerned to decrease the running charges of electric energy with considering the environmental protection for decreasing atmospheric emissions from pollutant productions at thermal power plants, the combined economic and emission dispatch (CEED) problem is helpful to decide the EPSO in financial aspects based on the minimizing total fuel cost and the total pollutant reduction. This paper presents impacts of the emission standard (EmiStd) in the CEED related to pollutant productions and allowed emissions in the EPSO. Moreover, the CEED has been demonstrated in different performances depended on the emission standard (EmiStd) scenarios for power outputs and total costs. These schemes have also presented in different characteristic computations. Based on the EmiStd scenarios, pollutant emissions have been produced totally around 12,127.45 kg/h to 14,570.74 kg/h. These pollutions have been allowed totally to discharge around 2,724.16 kg/h to 3,685.48 kg/h related to the EmiStd. In addition, total operating costs have been optimized around 17,439.47 $/h to 18,157.39 $/h considered the allowed emission.

Full article

 
9.

Integrated of Latest Publications on Intelligent Computation, Electrical Engineering, Power System, and Others

A.N. Afandi
Publishing Compilation (2014)

A.N. AFANDI (12 records)

Abstract
These achievements are provided in the center of various publications for collaborating all moments and events while concerning on research, presentation, journal, and others.

Full article

 
10.

Improved artificial bee colony algorithm considering harvest season for computing economic dispatch on power system

A.N. Afandi
IEEJ TEEE (2014)

A.N. AFANDI (12 records)

Abstract
This paper proposes the harvest season artificial bee colony (HSABC) algorithm, a novel improvement of the artificial bee colony (ABC) algorithm, for computing an economic dispatch solution of a power system based on fuel consumption and the produced emissions. A standard model of the power system, the IEEE-62 bus system, is used to show the performance of HSABC using equality and inequality constraints to determine the optimal solution for the economic operation of the power system. Simulations involving the proposed algorithm show that HSABC has better ability to determine the minimum values for the operating cost problem with faster convergence and shorter running time when compared to the traditional ABC algorithm.

Full article

 

Page 1, data 1 to 10 of 210, displayed in 10 data per page
 NEXT >>  LAST
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21

PPI Jepang 2012