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Microstructural study and differential scanning alorimetry analysis at elevated temperatures of uperheated as-cast A357 alloy
(University of Malaya, 2009)
The microstructure of superheated as-cast A357 alloy has been analysed to study the solidification structures of α-Al dendrites, eutectic Si particles and intermetallic compounds at different sections of the specimen. The ...
Numerical solution of the boundary layer flow over an exponentially stretching sheet with thermal radiation
(European Journals Inc., 2009-07)
In this paper, the problem of steady laminar two-dimensional boundary layer flow and heat transfer of an incompressible viscous fluid with a presence of thermal radiation over an exponentially stretching sheet is investigated ...
Study the properties of dense Hydroxyapatite - Extract from cow bone
(Malaysian Institute for Nuclear Technology Research, 2009)
In this study, natural HA were extrated from clean cow bone by treatment with NaOH and heating at high temperature before ground into fine powder. The HA powder were than mixed together with binder for several hours. Dense ...
Facial features for template matching based face recognition
(Science Publications, 2009)
Problem statement: Template matching had been a conventional method for object detection especially facial features detection at the early stage of face recognition research. The appearance of moustache and beard had ...
Design and analytical modeling of folded waveguide traveling wave tube
(Elsevier B. V., 2009-12-21)
We are developing a simple analytical model for the design of the folded waveguide traveling wave tube (FWTWT). Numerical software does exist for the design of FWTWT but requires large computer run time, is costly and does ...
Improved variational many-body wave function in light nuclei
(American Physical Society, 2009-09-10)
We propose and implement a simple method for improving the variational wave function of a many-body system. We have obtained a significant improvement in the binding energies, wave functions, and variance for the light ...
Reduced complexity optimum detector for block data transmission systems
(The Institute of Electronics, Information and Communication Engineers, 2009-12-10)
Block Data Transmission Systems (BDTS) are used in high-speed wireless communication systems with time dispersive channel characteristics. In such systems, blocks of data are separated by zeros to mitigate the effect of ...
Small-signal AC modeling technique of Buck converter with DSP based Proportional-Integral-Derivative (PID) controller
(IEEE, 2009-12-16)
Control applications of switched mode power supplies have been widely explored. The
main objective of research and development (R&D) in this field has always been to find
the simplest method to analyze and model the DC/DC ...
A CWDM/DWDM arrayed waveguide grating based on photodefinable polymer
(Institutul National de Cercetare-Dezvoltare pentru Optoelectronica, 2009-01)
New design of conventional AWG structures for CWDM/DWDM application based on photodefinable BenzoCyclobutene (BCB 4024-40) polymer is presented. The devices are designed on BK7 glass substrate and thin layer of SiO2 as ...
The analytical design of a folded waveguide traveling wave tube and small signal gain analysis using madey's theorem
(EMW Publishing, 2009)
We are developing an analytical model for the design of the folded waveguide traveling wave tube (FWTWT). This analytical model provides the physical view for rapid design optimization of the FWTWT. The design and analysis ...