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1.

Plutonium Utilization in FUJI-U1 Molten Salt Reactor

Cici Wulandari, Indarta Kuncoro Aji, Syeilendra Pramuditya, Sidik Permana, and Abdul Waris*
The 6th Asian Physics Symposium (2015)

Syeilendra Pramuditya (11 records)

Abstract
Molten salt reactor (MSR) design has been elected as one of the Generation IV nuclear energy systems, since it has many advantages such as safety improvement, proliferation resistance, resource sustainability, and ability to be used for hydrogen production. MSR has no chance for high power surges due to online refueling and small excess reactivity, which in turn enhances the safety aspect of MSR. Natural Thorium (232Th) can undergo the radiative capture reaction to generate the artificial fissile nuclide 233U after successive beta decays. Thorium - 233U fuel cycle will produce 232U, a 2.6 MeV gamma emmiter. These later two aspects provide the resource sustainability and the proliferation resistance advantages of MSR. FUJI-U1 is an MSR with 450 MWth of power output and 44.4% of thermal efficiency. The basic design of FUJI-U1 reactor utilizes ThF4-UF4 as a fuel composition. In this study, ThF4-PuF4 will be used instead of ThF4-UF4. SRAC 2006 code with JENDL 3.3 will be employed in the neutronics calculation.

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2.

LiF4-ThF4-PuF4 Utilization as Fuel Salt of miniFUJI Molten Salt Reactor

Abdul Waris*, Indarta Kuncoro Aji, Syeilendra Pramuditya, and Dwi Irwanto
The 6th Asian Physics Symposium (2015)

Syeilendra Pramuditya (11 records)

Abstract
Molten salt reactor (MSR) is one of the Generation IV nuclear energy systems. Recently, a thorium molten salt nuclear energy synergetic (THORIMS-NES) concept has being proposed for the sustainable and safe nuclear industry. The THORIMS-NES concept consists of three stages. The building of the miniFUJI reactor, a small 10 MWe power reactor that may be developed during 7 years is the initial stage. The second stage is the construction of the 100-300 MWe FUJI reactors, a thorium molten salt reactor planned to go online in 12-14 years. The setting up of regional breeding and chemical processing centers with production of 233U by thorium spallation in AMSB (accelerator molten salt breeder) is the final stage The original miniFUJI reactor design uses LiF-BeF2-ThF4-UF4 as a fuel salt. In the present study, the use of LiF4-ThF4-PuF4 a fuel salt instead of LiF-BeF2-ThF4-UF4 will be discussed. Several preliminary results will be presented in the full paper and also during the conference.

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3.

Hydrothermal Treatment of Oil Palm Empty Fruit Bunch to Produce Green Solid Fuel

Pandji Prawisudha, Achmad Rofi Irsyad, Srikandi Novianti, Kunio Yoshikawa, Ari Darmawan Pasek
The 2nd AUN-Seed NET Regional Conference on Energy Engineering 2014 (2014)

Srikandi Novianti (3 records)

Abstract
Oil palm is mainly grown in Southeast Asia, with Indonesia alone has 6 million hectares of oil palm plantation, and another 4 million by 2015 planned for biofuel production. This condition will produce massive amount of oil palms Empty Fruit Bunch (EFB), accounted for one-third of the Fresh Fruit Bunch (FFB) yield in weight, which can be used as carbon-neutral solid fuel. The usage of the EFB, however, is hindered by its bulky size, high moisture content and considerable amount of unwanted impurities such as potassium, responsible for slagging and fouling in the furnace. In this research, medium temperature hydrothermal process was used to upgrade the characteristic of EFB as solid fuel. Fresh and shredded EFB was processed in 2.5 L reactor, injected with saturated steam at moderate processing temperature of 150 to 200 C and 30 min holding period. Subsequent liquid-solid separation process was conducted to observe the remaining potassium in the solid product. Physical composition, heating value and remaining potassium content in the solid product was measured afterwards. The process yielded brittle, granular product similar to carbonized biomass. The highest fixed carbon content as solid fuel quality indicator was found at 200 C processing temperature with doubled fixed carbon content to that of EFB, while up to 77 % potassium reduction was observed at only 150 C processing temperature. It can be concluded that the combination of hydrothermal process and liquid-solid separation in optimum temperature will produce a carbon-neutral, potassium-free solid fuel suitable for conventional solid fuel furnace.

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4.

Upgrading of Palm Oil Empty Fruit Bunch Employing Hydrothermal Treatment in Lab-scale and Pilot Scale

Srikandi Novianti, MK Biddinika, Pandji Prawisudha, Kunio Yoshikawa
Procedia of Environmental Science (2014)

Srikandi Novianti (3 records)

Abstract
In this research, the hydrothermal treatment (HT) was applied to treat a waste stream from the commercial production of palm oil. The investigation both lab-scale and pilot-scale reactors have been conducted. The hydrothermal products were characterized and their fuel qualities were evaluated. The results indicated that the fuel qualities of the products improved after HT; such as higher carbon content, higher energy density, and lower O/C and H/C ratios compared with the raw feedstock. The HT products derived from the lab-scale and pilot-scale reactors had similar chemical compositions and energy density which indicated the feasibility of an up-scale application for this technology.

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5.

Municipal solid waste treatment using hydrothermal process to produce a renewable energy source

Pandji Prawisudha, Srikandi Novianti
Inovasi Online (2012)

Srikandi Novianti (3 records)

Abstract
An alternative treatment by converting Municipal Solid Waste (MSW) to alternative fuel by employing hydrothermal treatment in 1 ton/batch capacity commercial scale plant was conducted by applying medium pressure saturated steam at approximately 215 C in a stirred reactor for 30 minutes. The process yielded uniform pulp-like product with four-fold increasing density to reach 75% waste volume reduction. The product also showed an average heating value of 18 MJ/kg, which is similar to that of low-grade sub-bituminous coal. The energy balance calculation revealed that the required energy for the hydrothermal treatment was as low as one-ninth of the energy content in the product, which indicates that the hydrothermal treatment is a self-sustain system and requiring lower energy than conventional waste-to-fuel treatment processes. It can be concluded that the hydrothermal treatment would be a viable way to treat and convert the MSW to alternative renewable energy source.

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6.

Jellyfish collagen stimulates maturation of mouse bone marrow-derived dendritic cells

Agus Budiawan Naro Putra, Kosuke Nishi, Ryusuke Shiraishi, Mikiharu Doi, Takuya Sugahara
Journal of Functional Foods (2015)

A.B. Naro Putra (4 records)

Abstract
Jellyfish has recently attracted much attention for various applications, including functional foods due to its abundance of collagen. Jellyfish collagen, extracted from Nemopilema nomurai, was found to stimulate murine macrophage-like J774.1 cells. However, few reports have determined the immunostimulatory effects of jellyfish collagen on the innate immune response. We herein demonstrate the effect of jellyfish collagen on mouse bone marrow-derived dendritic cells (BMDCs). Jellyfish collagen stimulated TNF-α, IL-6, IL-1β and IL-12 production by BMDCs as the result of the elevation of gene expression level of these cytokines. In addition, jellyfish collagen-treated BMDCs have more wrinkles and longer pseudopodia on the cell surface compared with the control cells. Jellyfish collagen also stimulated cell-surface MHC-II expression level. Furthermore, jellyfish collagen downregulated phagocytosis capacity of BMDCs. Thus, our findings suggest that JC has the potential to activate DCs and thereby contribute to health promotion.

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7.

Activation of macrophages stimulated by the bengkoang fiber extract through toll-like receptor 4

Ika Dyah Kumalasari, Kosuke Nishi, Agus Budiawan Naro Putra, Takuya Sugahara
Food & Function (2014 )

A.B. Naro Putra (4 records)

Abstract
Bengkoang (Pachyrhizus erosus (L.) Urban) is an edible root tuber containing fairly large amounts of carbohydrates and crude fibers. Our previous studies showed that the bengkoang fiber extract (BFE) stimulates activation of macrophages, leading to induction of phagocytotic activity and cytokine production. In the present study we investigated the mechanism underlying activation of murine macrophages by BFE. BFE increased production of TNF-α, IL-6, and nitric oxide by J774.1 cells. In addition BFE also facilitated the gene expression levels of inducible nitric oxide synthase. We examined the effect of a TLR4 inhibitor on cytokine production to investigate the membrane receptor of macrophage activation by BFE. Treatment of J774.1 cells with the TLR4 inhibitor significantly inhibited production of IL-6 and TNF-α, suggesting that TLR4 is the target membrane receptor for BFE. The main signal molecules located downstream of TLR4 such as JNK, p38, ERK, and NF-κB were activated by BFE treatment. The immunostimulatory effect of BFE was cancelled by the pectinase treatment, suggesting that the active ingredient in BFE is pectin-like molecules. Overall results suggested that BFE activates J774.1 cells via the MAPK and NF-κB signaling pathways.

Full article

 
8.

Application of information and communication technology and data sharing management scheme for the coastal fishery using real-time fishery information

Ramadhona Saville, Katsumori Hatanakaa, Minoru Sano, Masaaki Wada
Ocean & Coastal Management (2015)

Ramadhona Saville (6 records)

Abstract
In this paper, we propose an automatic computation and data sharing scheme to support management system in coastal fishery using real-time fishery information through information and communication technology (ICT). In Japan, several species of fisheries commodity have not been specified in Total Allowable Catch policy, causing a lot of confusion on fishery cooperatives and fishermen on how to set the catch limit. To deal with the problem, in the previous study, we developed catchable stock index, a method to estimate a certain extent of resource via the swept area method. However, as the calculation of the index was computed on a GIS software manually, it was very time consuming, costly and unable to give an immediate evaluation of the fishing operation. This study aims to support management system in a coastal fishery through the development of automatic catchable stock index algorithm. In this study, ICT was utilized to obtain and transmit the real-time data sharing of fishery information as well as to distribute the computation results to the fishermen and fishery cooperative. The data used were vessels trajectories and catch records, which included the start/end time and catch amount of each fishing operation. The catchable stock index was automatically computed in an originally developed cloud computing service. We have conducted the test run of the present method in sea cucumber dredge-net fishery on the coast of Rumoi City, Hokkaido, Japan. Data were collected from the entire vessels in Rumoi (16 vessels) during the 2012 and 2013 fishing seasons. The results were returned to the fishermen via the Internet each day during the fishing season, therefore, fishermen were able to immediately evaluate their catch. The estimated catchable stock index for the 2012 and 2013 seasons was 85.5 tons and 92.3 tons, respectively. By referring to the present system, fishermen voluntarily stopped the 2012 and 2013 fishing season several weeks earlier than their initial schedule to avoid overfishing. Moreover, in the previous study, the spacing of the grid has been decided empirically, but in this study, the adequate grid size could be evaluated due to the fast computation through ratio of the area of a grid cell to the total dredged area. In light of the evidence, the present automatic algorithm provided useful information for supporting the self-management of this coastal fishery.

Full article

 
9.

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.

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10.

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.

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PPI Jepang 2012