Jamal Daoud - Academia.edu (original) (raw)

Papers by Jamal Daoud

The aim of this research project is to optimize incremental sheet metal forming process by analyz... more The aim of this research project is to optimize incremental sheet metal forming process by analyzing the significant parameters affecting the result of the optimization. The features of the incremental sheet forming (ISF) process allow it to meet a wide array of customer preferences without rely on dies and punches. In this paper, most significant parameter was systematically studied to achieve the aim of optimization. Taguchi method was used separately for single optimization of surface roughness, wall angles, spring back and wall thickness. By help of analysis of variance (ANOVA) the most significant parameter can be rank and the optimal set of parameters can be used according to the greatest effect on surface roughness and wall thickness. The confirmation test also showed that the response tables and graphs from Taguchi analysis and ANOVA constitute effective and efficient methods for determining each design parameter’s optimal level to produce the minimum value of the surface roughness and wall thickness. The implementation of Taguchi-based Grey optimization will be used to derive the optimal process parameters combination of wall angles, surface roughness and spring back. The output of the study will provide the optimal geometrical parameters for all objective functions, wall angles, surface roughness and spring back.

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ARPN journal of engineering and applied sciences, 2015

A modification to an effective path length for predicting rain attenuation in Malaysia is propose... more A modification to an effective path length for predicting rain attenuation in Malaysia is proposed in this paper. Due to the scarcity of actual signal measurements at high frequencies-bands in tropical climates make predicted models are key resource for generating rain attenuation. A modification to calculate the effective path length is introduced in the original model. A control parameter rho is also induced based on the rain intensity variations along the slant path. A new value is suggested according to measurements in Malaysia. The results showed that modified rain attenuation model has significantly improved the rain attenuation prediction in Malaysia.

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IIUM Press eBooks, 2011

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IIUM Press eBooks, 2011

The increasing demand for minimally-processed. extended shelflife foods and rcpons of ehemical pr... more The increasing demand for minimally-processed. extended shelflife foods and rcpons of ehemical preservatives as having potential toxicity demands food manufacturers to find altcrnative snurccs of anTimicrobial compounds. Food infection and into.~ication are considered as the most common causes of foodborne dir.eases worldwide. Foodbome pathogens cau.ing these diseases find their way in foods through cros, COnTamination. improper handling and temp<;'rature abuse. Food ,poilage microorganisms. On the other hand. cause products to lose thcir quality which renders them unacceptable to consumcrs, Shon shclflife of food products because of spoilage is one of thc major problems of the food induslTy. Examples of food spoilage microorganisms include P-<f:llJO",UlW;' ''':nlgillU.m. 8acilh,,· :Wblilis. I.acrolwdlllls 51' .. StJccho,-o"'yc-es cere,'i,i"e and AS/H'I"gilltr;, lIig"I".

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IIUM Press eBooks, 2011

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Journal of Southwest Jiaotong University, 2020

The notion of the sub-exact sequence is the generalization of exact sequence in algebra, particul... more The notion of the sub-exact sequence is the generalization of exact sequence in algebra, particularly on a module. A module over a ring R is a generalization of the notion of vector space over a field F. A Hilbert space refers to a special vector space over a field F when we have a complete inner product space. The space is complete if every Cauchy sequence converges. Now, we introduce the sub-exact sequence on a Hilbert space, which can be useful later in statistics. This paper is aimed at investigating the properties of the sub-exact sequence and their ratio to direct summand on a Hilbert space. As the result, we obtain two properties of isometric isomorphism sub-exact sequence on a Hilbert space.

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