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Title: Response of Soft Film/Hard Substrate and Hard Film/Soft Substrate Layered Systems Under Small Mass Impact
Author(s): Bong Hwan Kim, Kook Chan Ahn
Pages: 1-7 Paper ID:163002-8484-IJET-IJENS Published:February, 2016
Abstract: The impact response of layered systems subjected to small mass impact is studied by the coded finite element program. To simulate impact response, an effective finite element approach in conjunction with the Sun's higher-order beam theory and Kurapati’s generalized power law is proposed. Two typical film and substrate combinations, namely, Al/Si as soft film/hard substrate and Si/Al as hard film/soft substrate layered systems are considered. From the present numerical results, it can be seen that a generalized power law applied would be very helpful for estimating the impact responses of layered systems, and impact responses of Si/Al (hard film/soft substrate) layered systems are more sensitive than those of Al/Si (soft film/hard substrate) layered systems in the same film/substrate thickness. That is, this means that soft film/hard substrate layered systems may eventually be protected from impact damage and is more impact resistant than hard film/soft substrate layered systems. And, also, we can observe that in case of Al/Si (soft film/hard substrate) and Si/Al (hard film/soft substrate) layered systems, the interface and impacted surface unlike occurring in static analysis are prone to more failure risk than the other layer, respectively.
Keywords: Al/Si and Si/Al layered systems, Impact response, Small mass impact, Finite element analysis.
Full Text (.pdf)  International Journals Of Engineering and Science | 1,001 KB
Title: Measuring the Complexity in an Airplane Engine Maintenance Plant
Author(s): Rami H Alamoudi, Mohammed A Balubaid
Pages: 8-15 Paper ID:160802-4747-IJET-IJENS Published:February, 2016
Abstract: In this research, the manufacturing complexity of the Saudi Airlines Engineering Industries (SAEI) is measured to determine the complexity of their maintenance plants. We analyze the results based on the measurement of the complexity model to determine the most influential operations affecting the maintenance process and causing delays using the Pareto analysis (ABC analysis). When the complexity is considered for the planned and actual durations, there is no part mix ratio available for the data, and the planned and actual durations result in minor complexity measurements. The levels of complexity for the planned and actual durations are 1.375 and 2.1123, respectively. An ABC analysis is also conducted, and the results indicate that certain processes affect both plans.
Keywords: Complexity; Pareto Analysis; ABC analysis;
Full Text (.pdf)  International Journals Of Engineering and Science | 1,059 KB
Title: A Novel Approach in the Fabrication of Aluminum Nitride Layer from Nanoporous Alumina Template
Author(s): Alaba .O. Araoyinbo, Azwan Iskandar Azmi, Che Mohd Ruzaidi Ghazali, Azmi Rahmat, Kamarudin Hussain, Mohd Mustafa Albakri Abdullah.
Pages: 16-20 Paper ID:161102-9393-IJET-IJENS Published:February, 2016
Abstract: A new approach has been developed to produce AlN layer from nanoporous alumina template by direct nitridation of anodic aluminum oxide (AAO) at a low temperature of 450 oC. The AAO template was fabricated in a phosphoric acid electrolyte with a controlled voltage of 50 V at room temperature to produce nano pore sizes of about 75 nm. The SEM shows the surface morphology of the template with the random distribution of the ordered nano pores. While the XRD results show the presence of AlN during the nitridation reaction with the porous alumina surface layer and aluminum base. This process is highly economical and allows the incorporation of a porous oxide surface and an aluminum nitride base.
Keywords: AlN; Anodization; Electrolyte; Heat treatment; Nanoporous; Nitridation.
Full Text (.pdf)  International Journals Of Engineering and Science | 191 KB
Title: Solvent and Supercritical Fluid Extraction of Catechin from Camellia Sinensis (tea) Leaves for Utilization as Functional Food Ingredient
Author(s): Zokti James, A. Badlishah Sham Baharin, Abdulkarim S. M., Faridah Abas
Pages: 21-33 Paper ID:166002-7575-IJET-IJENS Published:February, 2016
Abstract: Supercritical fluid and solvent extraction of catechin from green tea (Camellia sinensis) leaves was studied. Response surface methodology was used to design the experiment and optimize the operating variables (pressure, temperature and dynamic time). The optimum recovery of the extractable crude yield (6.65%), TPC (28.07g/100gGAE), EGCG (263.06mg/100ml), and total catechin (844.25mg/100ml) were obtained at pressure (30Mpa), temperature (47.99oC and dynamic time( 40 minutes) with a co-solvent (50% v/v water :ethanol) and CO2flow rates of 1,5 and 1.0ml/ minute respectively. When organic solvent was used, the extractable components were in the range of: total crude extract (2.05 - 3.57%), TPC (153.22 -94.95g/(100gGAE), and TC (285.27mg/100ml) respectively. (With methanol 70 % (v/v), ethanol 50% (v/v), and ethanol 70% (v/v) being the most effective in term of extracts. The result of the extracts obtained by SFE extraction when compared to that of solvent shows that SFE was more effective in the recovery of catechin polyphenols from green tea leaves. By comparing conventional solvent and SFE extraction we were able to identify the abundance of green tea polyphenol from Malaysia which can compete favourably with those obtained from other tea producing countries. The knowledge can be useful to functional food manufacturers.
Keywords: Extraction, Supercritical Fluid extraction (SFE), solvent extraction, green tea catechin and functional food.
Full Text (.pdf)  International Journals Of Engineering and Science | 732 KB
Title: Highly Efficient Grating Coupler for SOI Integrated Photonics label free Bio-sensing Application
Author(s): Mohammad Mohiuddin Uzzal
Pages: 34-40 Paper ID:166102-3838-IJET-IJENS Published:February, 2016
Abstract: Integrated photonics based on silicon on insulator (SOl) using CMOS manufacturing process is a promising candidate for level free bio-sensing application. In this article we discuss on the principle and importance of level free bio-sensing. Then we present the design process and the finite difference time domain (FDTD) simulation result of building blocks for a typical optical ring resonator based integrated photonic bio-sensor operating at 1550nm. The resonance frequency of the design is 1550nm which experiences very low loss. Our designed ring has a radius of 10um, coupling gap between ring and waveguide of 150nm and waveguide width of 500nm. Input grating coupler has a period of 600nm with duty cycle of 0.67. The grating height is 175nm with 38 total periods. The output coupler has filling factor of 0.35 and period of 550nm with grating height of 250nm. There are total 25 periodic structure at output coupler. The SOI wafer has a silicon thickness of 340nm and buried oxide layer thickness of 1000nm. The overall efficiency of the grating coupler from input to output of the sensor is 42 percent.
Keywords: Label free, bio-sensor, ring resonator, coupling, optical sensor, Grating Coupler, Integrated Photonics, bio fictionalization, FDTD.
Full Text (.pdf)  International Journals Of Engineering and Science | 507 KB
Title: Information Systems Between Companies and Hospital Institutions: Differences, Common Points and Analyzes SWOT, within the Framework of a Process Approach
Author(s): S. Guetibi, M. EL Hammoumi
Pages: 41-51 Paper ID:166802-7474-IJET-IJENS Published:February, 2016
Abstract: The company of production of goods or services is a complex system, with organized socio-technical character to meet the expectations of its environment while remaining profitable and while seeking to achieve goals of reactivity and quality of service. Its organization itself crystallizes today primarily around process implementing a set of resources. However, the environment of the company changes and the latter must adapt continuously. Moreover, the company is the seat of sometimes unexpected interactions between the resources. All this can induce a certain number of unexpected situations, situations called at the risk with which the company is confronted. Steering becomes difficult then because it is necessary to maintain the coherence and the performance of the organization, without degrading the profitability of the activities. This is why any system, regardless of its level of development and its mode of operation, assumes the existence of an information system. This one has as a task to produce the data necessary to the determination of the priorities for the assignment of the available resources, to the evaluation of the programs implemented, to the extent of the State of activities and needs. This work is a comparison between the information systems of industries or the companies of productions of the goods and those of hospital institutions, by determining and defining the processes of each of both, in order to highlight the differences, commonalities, and to develop a SWOT analysis.
Keywords: comparison, information system, hospital information system, process approach, differences, common points, analyzes SWOT.
Full Text (.pdf)  International Journals Of Engineering and Science | 719 KB