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Studies on Cold Workability Limits of Brass Using Machine Vision System and its Finite Element Analysis  [PDF]
J. Appa Rao, J. Babu Rao, Syed Kamaluddin, NRMR Bhargava
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2011, DOI: 10.4236/jmmce.2011.109061
Abstract: Cold Workability limits of Brass were studied as a function of friction, aspect ratio and specimen geometry. Five standard shapes of the axis symmetric specimens of cylindrical with aspect ratios 1.0 and 1.5, ring, tapered and flanged were selected for the present investigation. Specimens were deformed in compression between two flat platens to predict the metal flow at room temperature. The longitudinal and oblique cracks were obtained as the two major modes of surface fractures. Cylindrical and ring specimen shows the oblique surface crack while the tapered and flanged shows the longitudinal crack. Machine Vision system using PC based video recording with a CCD camera was used to analyze the deformation of 4 X 4 mm square grid marked at mid plane of the specimen. The strain paths obtained from different specimens exhibited nonlinearity from the beginning to the end of the strain path. The circumferential stress component Os increasingly becomes tensile with continued deformation. On the other hand the axial stress Oz , increased in the very initial stages of deformation but started becoming less compressive immediately as barreling develops. The nature of hydrostatic stress on the rim of the flanged specimen was found to be tensile. Finite element software ANSYS has been applied for the analysis of the upset forming process. When the stress values obtained from finite element analysis were compared to the measurements of grids using Machine Vision system it was found that they were in close proximity.
Optical strain measurements and its finite element analysis of cold workability limits of pure aluminium
JB Rao, S Kamaluddin, NRMR Bhargava
International Journal of Engineering, Science and Technology , 2010,
Abstract: In the present research work a new method of optical strain measurement (Machine vision system) was proposed for the analysis of flow behaviour of pure aluminium as a function of friction, aspect ratio and specimen geometry. Implementation of this new method reduced the extent of experimentation. Eight standard shapes of the axisymmetric specimens of cylindrical with aspect ratios 1.0 and 1.5, ring, flanged and tapered were selected for the present investigation. Specimens were deformed in compression between two flat platens to predict the metal flow at room temperature. A 4 X 4 mm square grid was marked at mid plane of the standard specimens. Online video images of square grid were recorded during the deformation process till the crack initiation. The distortions of grid from recorded images were analyzed offline. Finite element software ANSYS has been applied for the analysis of the upset forming process. The FEA results were compared with the analytical results of various stresses from the experimental measurements of axial, circumferential strains and found to be in good agreement. Ring compression tests with its finite element analysis were carried out to determine the friction factor (m) between the die and work piece and same found to be 0.3.
Lepton Polarization Asymmetry in B l l(bar) decays in R-parity violating Minimal Supersymmetric Standard Model
Mir, Azeem;Tahir, Farida;Ahmed, Kamaluddin
High Energy Physics - Phenomenology , 2007, DOI: 10.1209/0295-5075/83/41002
Abstract: We study the implication of R-parity violating Rp Minimal Supersymmetric Standard Model (MSSM) model in lepton polarization asymmetry ALP in B l l(bar) decays . The analysis show that the ALP is significant in a certain phenomenological parametric region of Yukawa couplings. We have also placed indirect bounds on Lambda' lambda couplings as obtained from B t t(bar).
[(R)-2,2-Bis(diphenylphosphanyl)-1,1′-binaphthyl-κ2P,P′]{2-[(2R)-1,2-diamino-1-(4-methoxyphenyl)-3-methylbutyl]-5-methoxyphenyl-κC1}hydridoruthenium(II) benzene monosolvate
Kamaluddin Abdur-Rashid,Alan J. Lough
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812046065
Abstract: In the title complex, [Ru(C19H25N2O2)H(C44H32P2)]·C6H6, the RuII ion is in a distorted octahedral coordination environment with the hydride H atom trans to the tertiary carbinamine N atom, giving an H—Ru—N angle of 160.8 (12)°. The equatorial sites are occupied by two P atoms, the secondary carbinamine N atom and a coordinated C atom.
Validity and Reliability of the Management Communication Style Scale
Abdul Aziz Rozilah,Mokhtar Muhammad,Norlida Kamaluddin
International Journal of Social Science and Humanity , 2013, DOI: 10.7763/ijssh.2013.v3.268
Abstract: Communication is a vehicle and central element in an organization as it and serves many functions in organization. What people in the organization say has a meaningful impact on the total system of the organization. Encouraging subordinates to communicate and participate in decision-making not only can promote commitment among the subordinates, but also increase job satisfaction among people who interact and work interdependently. Based on this belief, this quantitative study was to systematically develop a reliable and valid construct that can facilitate and enhance the different Management Communication Style (MCS) in the Malaysian context. Four dimensions of MCS namely Tell, Sell, Consult and Join were identified through an extensive literature review by following Hinkin’s suggestions for construct development. A survey questionnaire was administered to 388 executives working directly under Human Resource Managers in the state-owned organization known as Government Link Companies (GLCs). A confirmatory factor analysis (CFA) was initially conducted on 20 items to explore the structure underlying the set of questions designed. The results of CFA confirmed that the measurement scale used in this study satisfactorily met the standard of validity and reliability analyses. The MCS construct provides a multi-dimensional assessment tool to diagnose and guide organizational communication.
Tax Literacy among Employees: Sabah and Sarawak’s Perspective
Nero Madi,Amrizah Kamaluddin,Tamoi Janggu,Muliati Binti Aba Ibrahim
International Journal of Economics and Finance , 2010, DOI: 10.5539/ijef.v2n1p218
Abstract: The main intent of this paper is to gauge the level of tax literacy among taxpayers in Sabah and Sarawak. It is vital to shed light on our preparation to face the challenge posed by the implementation of Self -Assessment System (SAS) in 2004 whereby the taxpayers are expected to be functionally tax-literate in computing their own tax liabilities accurately. Methodologically, the subjects were randomly sampled from taxpayers working in a few selected towns in Sarawak and Sabah. Statistical tests like t-tests and chi-square were applied onto the means of tax literacy scores by each state and the taxpayers’ respective workplaces. The taxpayers in Sarawak were found to be more tax-literate as compared to their counterparts in Sabah. Nonetheless, the taxpayers in both states were not eventually prepared for SAS. More aggressive efforts were recommended to raise the level of tax literacy among the taxpayers.
Erratum to “Progress in Therapy Development for Amyotrophic Lateral Sclerosis”
Kalina Venkova-Hristova,Alexandar Christov,Zarine Kamaluddin,Peter Kobalka
Neurology Research International , 2012, DOI: 10.1155/2012/853030
Abstract:
Progress in Therapy Development for Amyotrophic Lateral Sclerosis
Kalina Venkova-Hristova,Alexandar Christov,Zarine Kamaluddin,Peter Kobalka,Kenneth Hensley
Neurology Research International , 2012, DOI: 10.1155/2012/187234
Abstract: Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease that cannot be slowed substantially using any currently-available clinical tools. Through decades of studying sporadic and familial ALS (SALS and FALS), researchers are coming to understand ALS as a complex syndrome with diverse genetic and environmental etiologies. It is know appreciated that motor neuron degeneration in ALS requires active (gain of function) and passive (loss of function) events to occur in non-neuronal cells, especially astrocytes and microglia. These neuroinflammatory processes produce paracrine factors that detrimentally affect motor neurons, precipitating protein aggregation and compromising cytoskeletal integrity. The result is a loss of neuronal homeostasis and progressive die-back of motor axons culminating in death of the afflicted motor neurons. This review will discuss experimental therapeutics that have been tested in murine ALS models, with an emphasis on those that have progressed to human clinical trials. Reasons will be considered for the frequent failure of preclinical successes to translate into positive clinical outcomes. Finally, this review will explore current trends in experimental therapeutics for ALS with emphasis on the emerging interest in axon guidance signaling pathways as novel targets for pharmacological support of neural cytoskeletal structure and function in order to slow ALS. 1. Introduction Amyotrophic lateral sclerosis (ALS; colloquially referred to as Lou Gehrig’s disease in American English and Motor Neurone Disease in British English) is one member of a family of anterior (ventral) horn diseases that cause progressive, irreversible degeneration and ultimately death of spinal motor neurons and their cortical efferents [1]. Other anterior horn diseases include Charcot-Marie-Tooth disease, spinal muscular atrophy, progressive motor atrophy (PMA), poliomyelitis, and West Nile virus. ALS is anatomically distinguished from other anterior horn diseases and motor neuropathologies by involvement of both upper and lower motor tracts with a relative sparing of sensory neural degeneration, though sensory involvement is present in a subset of ALS patients. ALS is also distinguished from other motor neuron diseases by its frustrating lack of definable genetic causes and generally enigmatic etiology. Approximately, one fifth of ALS cases are hereditary, but even within this subset there are currently thirteen confirmed Mendelian mutations encoding proteins in disparate pathways that appear at first glance to be minimally
Combining ability analysis for grain filling duration and yield traits in spring wheat (Triticum aestivum L. em. Thell.)
Kamaluddin,;Singh, Rishi M.;Prasad, Lal C.;Abdin, Malik Z.;Joshi, Arun K.;
Genetics and Molecular Biology , 2007, DOI: 10.1590/S1415-47572007000300018
Abstract: a diallel analysis of wheat (triticum aestivum l. em. thell) parents (n = 11) and their f1 (n = 55) and f2 (n = 55) offspring was carried out for the following four traits: grain filling duration (gfd), gfd for growing degree days (gdd), 1000 seed weight and seed yield per plant. analysis of variance for general combining ability (gca) and specific combining ability (sca) displayed significant f1 and f2 general and specific combining ability effects for the four traits studied. for all the traits the gca effects were relatively more important than the sca effects, indicating that additive genetic effects were predominant. crosses displaying high sca effects for grain filling duration, seed weight and yield were observed to be derived from parents having various types of gca effects (high x high, high x low, low x low and medium x low). the single seed descent method can be applied to exploit additive gene effects whereas dominance gene effects could be valuable in hybrid wheat breeding programs. among the parents, genotypes from the international maize and wheat improvement center (centro internacional de mejoramiento de maíz y trigo, cimmyt) as well as south asia were found to be superior general combiners for grain filling duration. likewise, crosses involving diverse parents from cimmyt and south asia showed significant sca effects for grain filling duration and other traits.
Isolation, characterization and structural studies of amorpha – 4, 11-diene synthase (ADS3963) from Arte a L. misia annu
Pravej Alam,Usha Kiran2,M. Mobeen Ahmad,Kamaluddin3
Bioinformation , 2010,
Abstract: With the escalating prevalence of malaria in recent years, artemisinin demand has placed considerable stress on its production worldwide. At present, the relative low-yield of artemisinin (0.01-1.1 %) in the source plant (Artemisia annua L. plant) has imposed a serious limitation in commercializing the drug. Amorpha-4, 11-diene synthase (ADS) has been reported a key enzyme in enhancing the artemisinin level in Artemisia annua L. An understanding of the structural and functional correlations of Amorpha-4, 11-diene synthase (ADS) may therefore, help in the molecular up-regulation of the enzyme. In this context, an in silico approach was used to study the ADS3963 (3963 bp) gene cloned by us, from high artemisinin (0.7-0.9% dry wt basis) yielding strain of A. annua L. The full-length putative gene of ADS3963 was found to encode a protein consisting of 533 amino acid residues with conserved aspartate rich domain. The isoelectric point (pI) and molecular weight of the protein were 5.25 and 62.2 kDa, respectively. The phylogenetic analysis of ADS genes from various species revealed evolutionary conservation. Homology modeling method was used for prediction of the 3D structure of ADS3963 protein and Autodock 4.0 version was used to study the ligand binding. The predicted 3D model and docking studies may further be used in characterizing the protein in wet laboratory.
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