Tjahjono G.,Nusa Cendana University |
Setiawaty T.,Nusa Cendana University
IOP Conference Series: Materials Science and Engineering | Year: 2017
The research objective are: (1) Analyse the capacity needs of the wind energy system based on the parameters of energy requirements, the ability of the inverter, generator capability and the ability of the local wind. (2) Generate a simulate diesel-wind hybrid power plants for Kupang city and every district in Timor island; (3) Generate an optimization of wind-diesel hybrid power plant for Kupang city and districts in Timor island; (4) Generate a scheme wind-diesel hybrid power plant for Kupang city and every district in Timor island. The method used in this research is quantitative method with the approach of simulation, optimization and sensitivity analysis used HOMER application program, i.e.: (1) simulation system of diesel-wind hybrid power plant; (2) optimization system of diesel-win hybrid generator, and (3) the sensitivity analysis system diesel-wind hybrid power plant. Conclusion of this research are: (1) Simulation in Kupang city and districts of Kupang are wind turbines 20 KW with generator capacity of 71.7 KW. Optimization result of wind-energy contribution of only 7% and ideal price of US $ 0.47 to produce wind turbines of 20,000 KWH/yr; (2) Simulation in South Central Timor (TTS) district is wind turbines 3 KW with generator capacity of 11.4 KW. The result of optimization of wind-energy contribution of only 9% and ideal price of US $ 0.525 to produce wind turbines of 1.165 KWH/yr; (3) Simulation in North Central Timor (TTU) district is wind turbines 1 KW with generator capacity of 7.62 KW. Optimization result of wind-energy contribution of only 4% and ideal price of US $ 0.53 to produce wind turbines of 1.150 KWH/yr;(4) Simulation in Belu districts is wind turbines 10 KW with generator capacity of 12.1 KW. Optimization result of wind-energy contribution of only 22% and ideal price of US $ 0.48 to produce wind turbines of 1.210 KWH/yr. © Published under licence by IOP Publishing Ltd.
Clements D.L.,University of Adelaide |
Lobo M.,Nusa Cendana University
Engineering Analysis with Boundary Elements | Year: 2010
In this paper some two dimensional time dependent infiltration problems are considered. The problems involve infiltration from an irrigation channel into a homogenous soil and a soil which contains an impermeable finite inclusion. The problems are reduced to boundary integral equations which may be solved numerically using established procedures. Numerical results are obtained to provide the distribution of the matric flux potential for some particular impermeable inclusions and a particular channel shape. The results indicate how the distance from the channel influences the speed with which the matric flux potential reaches its steady state value. They also illustrate how the presence of an impermeable inclusion can increase the matric flux potential at points below the surface. © 2010 Elsevier Ltd. All rights reserved.
Rambu Ngana F.,Nusa Cendana University |
Myers B.A.,Charles Darwin University
Midwifery | Year: 2012
Objective: to describe the system of health reporting by village midwives and two rural clinics in eastern Indonesia and solve some of the problems in this system through consultation. Design: participatory action research model where problems are identified by those most affected and solutions sought. Clinic staff were observed and interviewed regarding their work roles and reporting duties. Allocation of work time to various tasks was recorded by all clinic staff before and after the implementation of a new health recording system. Several information sessions and focus group discussions were held with village midwives and other health staff to identify and address problems. Setting: Indonesia initiated a programme in 1989, aiming to place a midwife in every village, in response to high maternal mortality rates and low rates of births attended by trained birth assistants. Remote rural villages in eastern Indonesia have difficulty recruiting and retaining village midwives. These midwives play a crucial role in health reporting. During 2010 a new system of recording and reporting by clinics was implemented. Participants: village and clinic health staff in two rural subdistricts in eastern Indonesia. Findings: there was incomplete coverage by village midwives in the two subdistricts studied; 28% of villages had a resident midwife, 48% had a visiting midwife and 24% had only monthly visits by a mobile clinic. Village midwives performed duties additional to their official duties and training. Village midwives had problems associated with the reporting system including inconsistency in reporting, poor access to individual patient histories and poor access to clinics. These problems resulted in incompleteness and poor timeliness of data transfer. Key conclusions: midwives in remote villages felt compelled to provide services for which they were not trained. Poor quality of data reporting resulted from inconsistent reporting methods. Local staff can successfully change and manage reporting systems if given appropriate support and training. Implications for practice: socialisation of health reporting systems among all staff involved can lead to improved data consistency and completeness. Effective systems for data transfer and reporting may reduce time spent on these tasks by some staff. Improvements to accuracy of data and availability of individual patient histories have the potential to contribute to improved health care. Quality of health care by village midwives should be addressed by adequate training and improved transport. © 2011.
Mulyantini N.G.A.,Nusa Cendana University
Media Peternakan | Year: 2014
The objective of the study was to investigate broiler immune responses during the starter phase to graded levels of digestible lysine. ?Thisexperimentused17?? mixedsexbroilerchickensfrom1toThis experiment used 17mixed sex broiler chickens from 1 to 21 days of age. Seven chicks were selected and allocated to each floor pens. Chicks were fed experimental diets from one day old to 21 days of age. Dietary treatments included the following levels of digestible lysine: 6.0, 8.0, 10.0, 12.0 and 14.0 g/kg diet. Supplemental synthetic L-Lysine-HCl which was considered to be 100% digestible was added to diets to obtain the concentration of the digestible amino acid. At 21 days of age, two chickens from each pen with body weights close to the pen mean were selected for evaluation of immunological variables. Immune organs (spleen and bursa), cellular immune response (skin test), and antibody production against infectious bronchitis virus (IBV) were determined. Blood samples (plasma) were taken from the same birds to determine antibody titer against IBV. The birds were euthanized, and immune organs (spleen and bursa) were removed, and weighed individually. The results showed that spleen and bursa weight of birds fed diet containing 6.0 g/kg digestible lysine was significantly lower than those given diet containing 10 to 14 g/kg of digestible lysine. Toe web thickness of chickens fed diet containing 6.0 g/kg digestible lysine was significantly lower than the birds fed diets containing 14 g/kg digestible lysine. In conclusion, diet containing 8.0 g/kg appeared to have greatest potential to modulate immune response among other levels. However increasing levels of lysine did not have significant effect on antibody production.
Kelderman P.,UNESCO-IHE Institute for Water Education |
Ang'weya R.O.,UNESCO-IHE Institute for Water Education |
de Rozari P.,UNESCO-IHE Institute for Water Education |
de Rozari P.,Nusa Cendana University |
And 2 more authors.
Aquatic Sciences | Year: 2012
In 2007/08, a study was undertaken on the sediment dynamics in shallow Lake Markermeer (the Netherlands). Firstly, sediment characteristics were determined at 49 sites in the lake. Parameters such as median grain size and loss on ignition showed a spatial as well as water depth related pattern, indicating wind-induced sediment transport. Highly significant correlations were found between all sediment parameters. Lake Markermeer sediment dynamics were investigated in a sediment trap field survey at two permanent stations in the lake. Sediment yields, virtually all coming from sediment resuspension, were significantly correlated with average wind speeds, though periods of extreme winds also played a role. Sediment resuspension rates for Lake Markermeer were high, viz. on average ca. 1,000 g m-2 day-1. The highly dynamic nature of Lake Markermeer sediments must be due to the overall shallowness of the lake, together with its large surface area (dynamic ratio = [√(area)]/[average depth] = 7.5); wind-induced waves and currents will impact most of the lake's sediment bed. Indeed, near-bed currents can easily reach values >10 cm/s. Measurements of the thickness of the settled "mud" layer, as well as 137Cs dating, showed that long-term deposition only takes place in the deeper SE area of the lake. Finally, lake sediment dynamics were investigated in preliminary laboratory experiments in a small "micro-flume", applying increasing water currents onto five Lake Markermeer sediments. Sediment resuspension started off at 0.5-0.7 cm/s and showed a strongly exponential behaviour with respect to these currents. © 2011 Springer Basel AG.
Siburian R.,University of Tsukuba |
Siburian R.,Nusa Cendana University |
Kondo T.,University of Tsukuba |
Nakamura J.,University of Tsukuba
Journal of Physical Chemistry C | Year: 2013
Size controlled Pt catalysts supported by graphene nanosheets (GNS) are successfully prepared by changing the loading of Pt at 10-70 wt % using an impregnation method. It is found that Pt sub-nanoclusters (0.8 nm) with an extremely large surface area (170 m2 g-1) are formed on the GNS support in a 10 wt % Pt/GNS catalyst. An increase in loading of Pt leads to an increase in the particle sizes of Pt, which results in lower activities for electro-oxidation of adsorbed CO. A core level shift of Pt 4f in XPS indicates that Pt is chemically interacted with graphene. The modification of catalytic properties and the electronic structure is ascribed to the interface interaction between Pt and graphene via π-d hybridization. © 2013 American Chemical Society.
Wiguna G.A.,Gadjah Mada University |
Suparta G.B.,Gadjah Mada University |
Louk A.C.,Gadjah Mada University |
Louk A.C.,Nusa Cendana University
Advanced Materials Research | Year: 2014
An imaging procedure for developing a 3D X-ray micro-radiography system has been developed. The idea comes from the necessity of performing internal inspection and nondestructively test on a small specimen. The image is generated from multiple X-ray radiographs that were acquired from multiple angle of view. Each radiograph was taken for every degree. The total angle covers up to 360 degree so that a set of 360 images were collected for each specimen. Then, those images rendered to a 3D object. A set of image processing procedures were applied such as background subtraction and noise reduction. This experiment is very useful for assessing a small specimen nondestructively prior to perform a tomography inspection. © (2014) Trans Tech Publications, Switzerland.
Louk A.C.,Nusa Cendana University |
Louk A.C.,Gadjah Mada University |
Suparta G.B.,Gadjah Mada University |
Hidayah N.,Gadjah Mada University
Advanced Materials Research | Year: 2014
An image processing method has been developed for processing multiple images of x-ray micro-radiography. An x-ray micro-radiography image reflects quantum mottle so that its information content may tends to be corrupted. Therefore, a digital processing method has been developed to reduce the effect of quantum mottle as well as reducing the noise level. A set of radiographs are collected then summed. An image subtraction by a background image is carried out prior to the summation process. The signal to noise ratio (SNR) and contrast to noise ratio (CNR) after processing are compared with the SNR and CNR prior to the processing. As a result the final image for small specimen under x-ray micro-radiography inspection is better than original image without processing based on SNR and CNR assessments. © (2014) Trans Tech Publications, Switzerland.
Tokan M.K.,Nusa Cendana University
International Journal of Oceans and Oceanography | Year: 2015
Inventory and identification of conditions and the potential for small islands outer / leading residing in East Nusa Tenggara (Batek Island, Ndana Island, Dana Island, Mangudu Island and Alor Island) is seen from the positive side illustrates the great potential and opportunity in the future development, and prone to conflict than the negative side where the islands are located in strategic areas immediately adjacent to the two countries, the Batek Island and Alor Island directly adjacent to the island nation of the Repulic Democtaric Timor Leste (RDTL) while Mangudu, Ndana (Rote) and Dana (Savu) is immediately adjacent with the Australian state. Potential of the outer islands are located in East Nusa Tenggara almost all have high economic value, especially in the development of tourism, marine and fisheries where natural resources and beautiful of marine panoramic and the potential economic value of fish catches are able to contribute adequate for each area in particular and East Nusa Tenggara generally. It also indirectly an increase in activity through the utilization of available natural resources and various minimal infrastructure on the outer / forefront islands of the sovereignty of the Unitary Repbublic of Indonesia in the field of defense and security would indicate a fairly safe direction. Alor and Ndana Island can be developed as a maritime attraction, Batek and Dana Island can be developed as a marine conservation area and nature laboratory, whereas Mangudu Island can be developed as a tourism area. The data base is quite good provided may be used in future development plans for the outermost small islands in East Nusa Tenggara will be the guideline for future development planning, in policy making, the determination of the priority programs of development and in the preparation of the Spatial Plan of the area (Spatial) minor outlying islands / Leader so as to realize the welfare of society. © Research India Publications.
Buang Y.,Nusa Cendana University
Journal of Applied Pharmaceutical Science | Year: 2011
The present study was conducted to elucidate the metabolic pathways by which enlarged liver size of patients undergoing disorders of orotic acid de novo metabolism and those patients of enlarged liver size induced by di(2-ethyl hexyl) phthalate in rats as animal model. The results showed that rats-treated with orotic acid generated liver triglyceride content 400% higher than that of the control accompaniedwith a significant decrease of phospholipid levels (P<0.05). The rates of lipogenic enzymes, both fatty acid synthase (FAS) and phosphatidate phosphohydrolase (PAP), increase accompanying promotions of livertriglyceride content without any changes in fatty acid degradation pathway. However, those rats-treated with di(2- ethyl hexyl) phthalate generated liver phospholipid level significantly higher than of thecontrol accompanied with a markedly decreased the liver triglyceride levels. Both FAS and PAP activities were almost similar with those controls but the rates of fatty acid degradation were increased approximately by 2.5-fold of control. In conclusion: The enlargement of liver size induced by orotic acid is associated with largely retains triglyceride molecules in liver tissues, whereas those induced by di(2-ethyl hexyl) is associated with the induction of phosphorylation generating an increase of liver phospholipid levels.