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102 articles for “hole”
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Research ArticleOpen accessIn the abstractStress Prediction in the Dynamic Compression Plate with Changing the Configuration of the Screw FixationBoonthum WongchaiProblem statement: Human femur fracture is one of the most frequent type of bone fractures. One of the widely used methods in an internal fixation is an application of the Dynamic Compression Plate (DCP). The configuration of the screw fixation plays a major role of the DCP stress. Approach: This research is proposed to investigate the stress distribution in the … …Journal of Computer Science, Vol. 7, Issue 4 · 4 Apr 2011 · 7,620 accessesView PDFCite
Research ArticleOpen accessIn the abstractPositron Annihilation Study on Nickel and Iron Nano-Particles in Natural Rubber CompositesEmad Hassan AlyProblem statement: The effect of Ni and Fe nano-particles as a filler on the free volume properties Of Natural Rubber (NR) was studied using Positron Annihilation Lifetime Spectroscopy (PALS). Approach: The PAL measurements revealed that the free volume properties are strongly affected by the amount and type of filler. Results: Particularly speaking, the free volume fraction dramatically decreased by increasing … …American Journal of Applied Sciences, Vol. 8, Issue 2 · 28 Feb 2011 · 7,631 accessesView PDFCite
Research ArticleOpen accessIn the abstractBoric Acid Toxicity Trials on the Wood Borer Heterobostrychus aequalis Waterhouse (Coleoptera: Bostrychidae)Daljit Karam Singh, Faizah Abood, Hazandy Abdul-Hamid et al.Abstract: Problem statement: The Heterobostrychus aequalis Waterhouse was a serious pest lumber of timber heveawood. The H. aequalis infest and tunnel along the wood grain, depositing eggs, which concomitantly turn into larvae and reduces the wood starch to a soft powder. The objectives of the study were to establish a suitable method for preservative trials on the wood borer and … …American Journal of Agricultural and Biological Sciences, Vol. 6, Issue 1 · 15 Dec 2010 · 10,236 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Thickness of Tris (8-Hydroxyquinolinato) Aluminum on the Photoluminescence and I-V Characteristic of Organic Light Emitting StructureLim Mei Yee, Wan Mahmood Mat Yunus, Zainal Abidin Talib, Anuar KassimProblem statement: How the thickness of the tris (8-hydroxyquinolinato) Aluminum (Alq3) effect the optical and electrical properties of organic light emitting diode. Approach: The optimum thickness, photoluminescence and current-voltage characteristic of Alq3 layer on N, N-bis (inaphthyl)- N,N-diphenyl-1,1-biphenyl-4,4-diamine (55 nm) layer in Organic Light-Emitting Devices (OLED) structure are reported. Alq3 and NPB organic layers are used as Electron Transport Layer … …American Journal of Applied Sciences, Vol. 7, Issue 9 · 30 Sep 2010 · 8,253 accessesView PDFCite
Research ArticleOpen accessIn the abstractUtilization and Modification of Point Sampling and Line Sampling in the Forestry SurveyDifei ZhangProblem statement: In the practice of conventional point sampling and line sampling methods in the forestry survey, we often encounter problems such as boundary and hole problems. These problems could introduce bias in the results of forest sampling. Proper modifications are needed. Approach: This study developed novel probability computation approaches in the utilization and modification of horizontal point sampling and … …Current Research in Biostatistics, Vol. 1, Issue 1 · 30 Jun 2010 · 7,679 accessesView PDFCite
Research ArticleOpen accessIn the abstractSimulation of the Cuttings Cleaning During the Drilling OperationHussain H. Al-Kayiem, Nadia Mohd Zaki, Muhamad Z. Asyraf, Mahir Elya ElfeelProblem statement: Oil well cleaning is the ability of a drilling fluid to suspend and transport drilled cuttings from the down hole (bit face) to the surface. The cleaning performance was affected by many factors such as fluid viscosity, annular flow velocity, angle of inclination and drill cuttings size and shape and. Approach: Navier-Stoke equations, the continuity equation and the … …American Journal of Applied Sciences, Vol. 7, Issue 6 · 30 Jun 2010 · 8,257 accessesView PDFCite
Research ArticleOpen accessIn the abstractDevelopment of a Fully Coupled Approach for Evaluation of Wellbore Stability in Hydrocarbon ReservoirsVera RoccaProblem statement: When a well is drilled in a hydrocarbon reservoir, the original thermodynamic conditions are altered, the natural stresses are redistributed and a stress concentration occurs around the hole. The alteration of the original equilibrium can lead to wellbore damage, sometimes to its complete collapse. Loss of time associated with stability problems is estimated to account for 12-15% of … …American Journal of Environmental Sciences, Vol. 5, Issue 6 · 31 Dec 2009 · 7,564 accessesView PDFCite
Research ArticleOpen accessIn the abstractFinite Element Analysis of the Crack Propagation for Solid MaterialsMiloud Souiyah, A. Muchtar, Abdulnaser Alshoaibi, A. K. AriffinProblem statement: The use of fracture mechanics techniques in the assessment of performance and reliability of structure is on increase and the prediction of crack propagation in structure play important part. The finite element method is widely used for the evaluation of SIF for various types of crack configurations. Source code program of two-dimensional finite element model had been developed, … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 7,848 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Adaptation of Fishing Instruments by a Farmers' Community in the Thung Kula Area, in North Eastern ThailandWorawan Ubonlert, Songkhun Chantachon, Worapol EngwanichProblem statement: In a historical study of the ancient communities in the area of Thung Kula, it was revealed that there are important resources including rice, fish, salt and iron. Salt is used in making fermented fish (known locally as Pla Daek), a culinary culture which has been prevalent in the ethnic groups of Laos and Khmer. The availability of … …Journal of Social Sciences, Vol. 5, Issue 2 · 30 Jun 2009 · 7,870 accessesView PDFCite
Research ArticleOpen accessIn the abstractPriority and Random Selection for Dynamic Window Secured Implicit Geographic Routing in Wireless Sensor NetworkZurina Mohd Hanapi, Mahmod Ismail, Kasmiran JumariProblem statement: Sensor nodes are easily exposed to many attacks since it were deployed in unattended adversarial environment with no global addressing and used for critical applications such as battlefield surveillance and emergency response. While the sensor also needs to act as a router to relay a message to a required recipient, then this increased the vulnerabilities to a network … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Jun 2009 · 7,656 accessesView PDFCite