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Search Results: 1 - 10 of 198415 matches for " N. Agung;Torii "
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Emission factor of single pellet cake seed Jatropha curcas in a fix bed reactor
Pambudi, N. Agung;Torii, Shuichi;Syamsiro, M.;Saptoadi, Harwin;Gandidi, Indra Mamad;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2012, DOI: 10.1590/S1678-58782012000200009
Abstract: the objective of this study is to evaluate the emission factor of oil cake seed jatropha curcas that was formed into pellets with three parameters: pyrolisis, densification and air flow rate. the effect of pyrolisis was investigated using four samples of pellet: nonpyrolysis pellet, 90 minutes pyrolysis pellet, 120 minutes pyrolysis pellet, 150 minutes pyrolysis pellet. the effect of densification was provided by three samples: 11 mm, 13 mm, and 16 mm diameter. furthermore, the parameter of air flow rate was varied from 0.1 m/s to 0.4 m/s. the results show that the lowest emission factor occurs in the non-pyrolysis pellet containing 14.3 gram carbon monoxide per kilogram pellet. meanwhile the best densification was obtained by 13-mm diameter pellet containing 14.8 gram carbon monoxide. air flow rate of 2.0 m/s was the suitable air flow rate to achieve lowest emission factor.
Zonation Compatibility on Forest Mangrove Area in Delta Mahakam, East Kalimantan Indonesia
N Nursigit,Lachmuddin Sya’rani,Agung Suryanto
International Journal of Waste Resources , 2013, DOI: 10.12777/ijwr.v3.i1.p47-55
Abstract: Delta Mahakam, Kutai Kartanegara regency, is considered has huge and complete water resource. The ecosystem of coastal areas is consisted of mangrove, sea grass, coral reefs; natural resources of coal, oil and gas, and also fisheries resource. The objective of this research was to (1) Study the land use pattern of forest aquaculture area (KBK) in Delta Mahakam, and (2) Analyze the zonation compatibility of KBK in Delta Mahakam. The research method; the research was conducted in Muara Badak sub district (Muara Badak Ulu, Salo Palai and Saliki village) and Anggana sub district (Tani Baru, Muara Pantuan and Sepatin village). The data was taken using exploratory descriptive and purposive sampling method followed by data analysis and compatibility analysis. The result showed that the land use pattern of KBK in Delta Mahakam consisted of fishpond area accounted by 45,325 ha, mangrove/palm/swamp shrub area by 20,971.52 ha, open space/residential area by 18,651.54 ha and swamp forest area by 24,972.28 ha. Zonation compatibility of KBK in Delta Mahakam showed that the miss use of coastal management was 62.28% which consisted of fishpond area 44.16% and open/residential area 18.12%. Some recommendations formulated from academic point of view were as follows: research on KBK mismanagement effect in Delta Mahakam due to fishpond activities against the quality of environment, biodiversity and regional economy, and also research on economic and social losses due to zonation incompatibility of KBK in Delta Mahakam are needed to be done. It also recommended a regulation formulation on reformation of land use planning in Delta Mahakam and its regulation implementation so that KBK will conform to the current utilization purposes is needed to be addressed and legalization on regional regulation concerning on Strategic Land Use Planning of Delta Mahakam is immediately needed to be conducted
Flip-Flop Flow Control inside Streamwise Diverging Diamond-Shaped Cylinder Bundles with Concavities  [PDF]
Shuichi Torii, Shizaburo Umeda
Journal of Flow Control, Measurement & Visualization (JFCMV) , 2013, DOI: 10.4236/jfcmv.2013.13010
Abstract: The flow visualization work with the aid of PIV and Piezometer deals with flip-flop flow around diamond-shaped cylinder bundle revised with concavities on both bundle walls. It is disclosed that 1) the concavity constructed on both side-walls of a diamond cylinder induces a substantial change in the flow patterns in the exit jet-stream field and jet- stream dispersion, 2) pressure characteristics are quantitatively measured in a diverging-flow region in diamond cylinder bundles with concavityand in its downstream region, and 3) flip-flop flow occurs in the flow passages and its occurrence condition is obtained.

Displacement of Morphological Characters of Barbodes gonionotus at Serpeng Cave Lake, Gunungkidul
AGUNG BUDIHARJO
Biodiversitas , 2001,
Abstract: Serpeng cave lake is located inside a cave that is isolated from any waters outside the cave, and the lake is located about 96 meters down under the ground surface. The isolated waters in the lake have also resulted in the isolation of the fishes from any other fish populations outside the cave. The objective of the study was to know how the displacement of morphological character occurred on a group of fish suspected belong to Barbodes gonionotus lived in Serpeng lake based on the observation of morphological characters of the fish. The Barbodes gonionotus from Kalisuci river and a well at Serpeng village was used as a comparison. The morphological characters observed were morphometric, meristic, color of scale, and number of vertebrae. The parameters of the water environment were also measured. The morphological characters from the three populations of fish were compared. The correlation coefficient of the morphologic data was measured, and grouping analysis was also applied for data. There was not any obvious differences observed between fishes from Kalisuci river and well at Serpeng village, on the other hand, the differences were obviously observed for the fish from the lake compared to the fishes from the river and well. The differences were evident from all characters observed. The grouping analysis indicated that the fish population suspected to be Barbodes gonionotus from the lake was separated from the same species of the river and well, while the distinct features were not observed between both fishes from the river and well. Based on the basic characters and observed morphological characters of Barbodes gonionotus suggest that the speciation of the fish to the subspecies taxonomic level has occurred.
Selection and potential aquaculture of “wader” fish of the Genus Rasbora
AGUNG BUDIHARJO
Biodiversitas , 2002,
Abstract: “Wader” fish is one of the local Indonesian wild fish that not cultured yet. This fish have amount of species, included Genus Rasbora. The aim of this research was to known the “wader” fish diversity of Genus Rasbora that potentially to aquaculture. The research conducted in 10 weeks to three species, namely R. lateristriata, R. aprotaenia, and R. argyrotaenia. The research was designed in two treatments, namely giving pellet and non-giving pellet. The growth data was measured every week. The result indicated that pellet could increase size and growth of the fish. R. argyrotaenia had bigger size and faster growth than R. lateristriata and R. aprotaenia. The optimum growth of R. argyrotaenia occured at third to sixth weeks, and it got maximum size at seventh week. So it was suitable to aquaculture.
Reproduction pattern of “gading starling” (Turdus sp.) at Mount Lawu, Central Java
AGUNG BUDIHARJO
Biodiversitas , 2005,
Abstract: The aim of the research was to know reproduction pattern of “gading starling” (Turdus sp.) in natural habitat, namely Mount Lawu. This research was expected to give accurate information that can be used as base of conservation effort. Research had been done alongside of Cemoro Sewu tracking line. Data was collected at 2600, 2800, 3000, 3100, and 3200 m. asl., in March, April, May, and October 2004. Nesting observation was concerning with nest place at tree, height of ground surface, apart from tracking line, nest materials, size and shape of nest. Egg observation was concerning with the amount of egg per nest, time lay eggs, and amount of infant. Environmental data was concerning with air temperature and humidity. The result indicated that nest location had similar type, i.e. located among ramification encircled by some small stick and shaded by leaves. Height of nest about 0.2-7 m above ground surface. About 90% nest was laid in radius less than 40 m of tracking line. Nest materials predominated by grasses mixtured with dry leaf and small stick. Shape of nest was bowl-like with external diameter 16-19 cm and internal diameter 8-12 cm, and deepness of nest 5-7 cm. Breeding season was around March-April. Shape of egg was oval with mean of length 2.4 cm and diameter 1.5 cm. Egg color was pale blue with small pock of pale brown. Mean of egg amount 2-3 items per nest. Mean of efficacy hatch 1-2 individual per nest, but infant which living on generally only 1 individual. During research noted that lowest temperature 80oC, highest temperature 20oC, and mean of air humidity 70-90%. This research concluded that “gading starling” had typical reproduction behavior, especially in selecting nest location and nest materials.
A Unified Energy Approach for B-Spline Snake In Medical Image Segmentation
Agung Alfiansyah
TELKOMNIKA , 2010,
Abstract: The parametric snake is one of the preferred approaches in feature extraction from images because of their simplicity and efficiency. However the method has also limitations. In this paper an explicit snake that represented using BSpline applied for image segmentation is considered. In this paper, we identify some of these problems and propose efficient solutions to get around them. The proposed method is inspired by classical snake from Kass with some adaption for parametric curve. The paper also proposes new definitions of energy terms in the model to bring the snake performance more robust and efficient for image segmentation. This energy term unify the edge based and region based energy derived from the image data. The main objective of developed work is to develop an automatic method to segment the anatomical organs from medical images which is very hard and tedious to be performed manually. After this segmentation, the anatomical object can be further measured and analyzed to diagnose the anomaly in that organ. The results have shown that the proposed method has been proven qualitatively successful in segmenting different types of medical images.
The most probable wave function of a single free moving particle
Agung Budiyono
Physics , 2009, DOI: 10.1103/PhysRevA.80.042110
Abstract: We develop the most probable wave functions for a single free quantum particle given its momentum and energy by imposing its quantum probability density to maximize Shannon information entropy. We show that there is a class of solutions in which the quantum probability density is self-trapped with finite-size spatial support, uniformly moving hence keeping its form unchanged.
Spatiotemporally-localized-stationary typical wave function satisfying Klein-Gordon equation with emergent mass
Agung Budiyono
Physics , 2005,
Abstract: Starting from relativistic mass-less Madelung fluid, we shall develop a class of typical wave functions by imposing it to maximize Shannon entropy given its finite average quantum potential. We show that there is a class of solutions in which the wave function is spatiotemporally localized with finite spacetime support, uniformly moving hence stationary. It turns out that the quantum amplitude satisfies Klein-Gordon equation with emergent mass term proportional to the square root of average quantum potential. We show that there is physical time uncertainty which decreases as the mass increases. We also rederive the classical energy-momentum relation provided the de Broglie-Einstein relation holds. In this case, the time uncertainty is proportional to the inverse of classical energy.
Perturbation Theory Based on Darboux Transformation on One-Dimensional Dirac Equation in Quantum Computation
Agung Trisetyarso
Physics , 2010, DOI: 10.1109/ICoICT.2013.6574591
Abstract: We present the recent works \cite{trisetyarso2011} on the application of Darboux transformation on one-dimensional Dirac equation related to the field of Quantum Information and Computation (QIC). The representation of physical system in one-dimensional equation and its transformation due to the Bagrov, Baldiotti, Gitman, and Shamshutdinova (BBGS)-Darboux transformation showing the possibility admitting the concept of relativity and the trade-off of concurrent condition of quantum and classical physics play into the area of QIC. The applications in cavity quantum electrodynamics and on the proposal of quantum transistor are presented.
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