Effective kaon energy from a novel chiral SU(3) model

A new chiral SU(3) Lagrangian is proposed to describe the properties of kaons and anti-kaons in the nuclear medium. The saturation properties of nuclear matter are reproduced as well as the results of the Dirac-Brückner theory. After introducing the coupling between the omega meson and the kaon, our results for effective kaon and anti-kaon energy are quite similar as calculated in the one-boson-exchange model

Thermomechanical Analysis of a Thermal Protection System with Defects and Heat Shorts

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/77124/1/AIAA-2006-2212-827.pd

NEURAL NETWORKS AND EVOLUTIONARY OPTIMIZATION TECHNIQUES AND THEIR APPLICATIONS IN FATIGUE LIFE ASSESSMENT OF COMPOSITE MATERIALS-A BRIEF REVIEW

Modeling of fatigue life of composite materials under various loading and environment conditions becomes important and challenging task from viewpoint of performance and reliability as it forms a basis for lifetime assessment of composite structures under complex variable state of stress. Application of soft computing techniques as new approach and route for modelling of composite material fatigue lives has attracted a great interest recently. The applications of soft computing techniques in fatigue life assessment of composite materials are reviewed and discussed in this paper

MESHLESS METHODS FOR SOLVING REACTION-DIFFUSION PROBLEMS-A BRIEF REVIEW

Reaction-diffusion equations represent many important and critical applications in engineering and science. Numerical techniques play an important role for solving such equations accurately and efficiently. This paper presents a brief review of meshless methods for solving general diffusion equations, including reaction-diffusion systems

The EST Model for Predicting Progressive Damage and Failure of Open Hole Bending Specimens

Progressive damage and failure in open hole composite laminate coupons subjected to flexural loading is modeled using Enhanced Schapery Theory (EST). Previous studies have demonstrated that EST can accurately predict the strength of open hole coupons under remote tensile and compressive loading states. This homogenized modeling approach uses single composite shell elements to represent the entire laminate in the thickness direction and significantly reduces computational cost. Therefore, when delaminations are not of concern or are active in the post-peak regime, the version of EST presented here is a good engineering tool for predicting deformation response. Standard coupon level tests provides all the input data needed for the model and they are interpreted in conjunction with finite element (FE) based simulations. Open hole bending test results of three different IM7/8552 carbon fiber composite layups agree well with EST predictions. The model is able to accurately capture the curvature change and deformation localization in the specimen at and during the post catastrophic load drop event

COASTAL UPWELLING UNDER THE INFLUENCE OF WESTERLY WIND BURST IN THE NORTH OF PAPUA CONTINENT, WESTERN PACIFIC

Coastal upwelling play an important role in biological productivity and the carbon cycle in the ocean. This research aimed to examine the phenomenon of coastal upwelling that occur in the coastal waters north of Papua continent under the influence of Westerly Wind Burst(WWB) prior to the development of El Nino in the Pacific. Data consisted of sea surface temperature, vertical oceanic temperature, ocean color satellite image, wind stress and vector wind speed image, sea surface high, and Nino 3.4 index. Coastal upwelling events in the northern coastal waters of Papua continent occurred in response to westerly winds and westerly wind burst (WWBs) during December to March characterizing by low sea surface temperature (SST) (25 - 28C), negative sea surface high deviation and phytoplankton blooming, except during pre-development of the El Nino 2006/2007 where weak upwelling followed by positive sea surface high deviation. Strong coastal upwelling occurred during two WWBs in December and March1996/1997 with maximum wind speed in March produced a strong El Nino 1997/1998. Upwelling generally occurred along coastal waters of Jayapura to Papua New Guinea with more intensive in coastal waters north of Papua New Guinea indicated by Ekman transport and Ekman layer depth maximum

Characterization of carbon nanotubes produced by arc discharge: Effect of the background pressure

Single walled carbon nanotubes (SWNT) produced by the anodic arc discharge over a range of constant background pressures of helium (100–1000 Torr) were examined under a high-resolution transmission electron microscope, and a Raman spectrometer. It was found that the average SWNT diameter is about 2 nm and fairly independent of the background pressure. Analysis of the relative purity of SWNTs samples suggests that highest SWNT relative concentration can be obtained at background pressure of about 200–300 Torr. Measured anode ablation rate increases linearly with background pressure. The model of the anodic arc discharge was developed. It was found that the predicted anode ablation rate agrees well with experiment suggesting that electron temperature in the anodic arc is about 0.5 eV. © 2004 American Institute of Physics.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/69876/2/JAPIAU-95-5-2749-1.pd

Thermomechanical Behavior of Damaged TPS Including Hypersonic Flow Effects

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76198/1/AIAA-2006-7951-158.pd

Kajian Pengelolaan Hara Spesifik Lokasi Padi Sawah Irigasi di Kabupaten Buru

Assessment on Site-Specific Nutrient Management of Irrigated Rice in Buru Region. Recommended dose of package fertilize which is widely applied by administrative boundaries or district is less appropriate with principles of site-specific nutrient management (SSNM). Fertilizer recommendations should be based on soil fertility status (SFS) and plant responses to fertilization in a specific yield target. Analysis spatial data are available online with Geographic Information Systems (GIS) can be used in a rapid, inexpensive and relatively accurate to help map SFS and fertilizer recommendations. The purpose of this study was to determine the dose and N, P and K fertilizer recommendation maps for paddy on each SFS mapping unit in Waeapo Plains, Buru. Omission plot trials were conducted at 12 locations. Mapping fertilizer recommendations were made by spatial analysis using software Krigging Interpolator of ArcView GIS. The results showed that the target of sustainable rice yield ranged from 6.40 to 6.75 t paddy/ha. The need for fertilizer N, P and K on lowest SFS is 120.20 kg N/ha, 13.03 kg P/ha and 58.12 kg K/ha. While at low SFS is 136.53 kg N/ha, 13.46 kg P/ha and 58.97 kg K/ha. The areas were divided into five fertilizer recommendations based on SFS and target sustainable yield rice namely SR-I 14,830.02 ha area; SR-II covering 4,722.42 ha; R-I covering 3,763.67 ha, R-II covering 1,022.11 ha and R-III with an area 1510.60 ha. Analysis of satellite imagery with GIS can be used to map the SFS and site-specific fertilizer recommendations in a rapid, inexpensive and accurate

Land Suitability and Proposed Land Utilization of Selaru Island, West Southeast Moluccas Regency for Development Food Crops

The study was conducted in Selaru Island, West Southeast Moluccas Regency in an area of   32,217 ha. The research objective was to determine the land suitability and proposed land utilization of Selaru Island for development of food crops. The results showed that Selaru Island has a rather suitable (S2) and marginally suitable (S3) for six crops (upland rice, corn, peanuts, mungbeans, sweet potato, and caladium) covering an area of   19,330 ha and not suitable permanent (N2) for the six crops covering an area of   3,905 ha, while the area of   8,982 ha partly classified accordingly (S3) to plant upland rice and calladium and partially classified as not suitable (N1 and N2) for corn, peanuts, mungbeans, and sweet potatoes. The main limiting factor to the primary land use for food crops in Selaru Island, West Southeast Moluccas Regency among others are the temperatures (the average annual temperature is high), rooting medium (soil solum is shallow), nutrient retention (soil pH is rather alkaline to alkaline), erosion hazard level is moderate, and terrain (wave, rocks on the surface of the soil, and rock outcrop).The proposed land utilization of Selaru Island for food crops based on land suitability classes are (1) food crops of upland-1 with the main commodities of corn, mungbeans, uwi/kumbili and caladium an area of   5,299 ha, (2) food crops of upland-2 with the main commodities of upland rice, uwi/kumbili and caladium an area of   8,982 ha, and (3) food crops of upland-3 with the main commodities peanuts and mungbean an area of   14,031 ha. Development of food crops in Selaru Island need to consider the priority scale factor, the level of compliance, and social culture of the local community