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Shah Alam, Malaysia

Kamaruzaman D.,University Technology of MARA | Ahmad N.,University Technology of MARA | Annuar I.,University Technology of MARA | Rusop M.,University Technology of MARA | Rusop M.,UniversitiTeknologi
Japanese Journal of Applied Physics | Year: 2013

Nanostructured iodine-post doped amorphous carbon (a-C:I) thin films were prepared from camphor oil using a thermal chemical vapor deposition (TCVD) technique at different doping temperatures. The structural properties of the films were studied by field-emission scanning electron microscopy (FESEM), energy-dispersive spectroscopy (EDS), Raman, and Fourier transform infrared (FTIR) studies. FESEM and EDS studies showed successful iodine doping. FTIR and Raman studies showed that the a-C:I thin films consisted of a mixture of sp 2- and sp3-bonded carbon atoms. The optical and electrical properties of a-C:I thin films were determined by UV-vis-NIR spectroscopy and current-voltage (I-V) measurement respectively. The optical band gap of a-C thin films decreased upon iodine doping. The highest electrical conductivity was found at 400 °C doping. Heterojunctions are confirmed by rectifying the I-V characteristics of an a-C:I/n-Si junction. © 2013 The Japan Society of Applied Physics. Source


Hashim S.F.S.M.,UniversitiTeknologi | Ismail Z.,UniversitiTeknologi
BEIAC 2013 - 2013 IEEE Business Engineering and Industrial Applications Colloquium | Year: 2013

Most of the organizations now shift from manual document management to electronic document management, which is found to be more reliable and efficient. Since early 1990, the utilization of electronic documents on daily routine activities is practiced by all levels of management. However, in managing the information, employees' should comprehend with the technology to support electronic document practices. The objective of this study was to find out relationship on perceived ease of use of electronic document towards job performance. There are three elements in job performance that used in this study: attitudes, readiness, and job appraisal. A supervise structured questionnaire was used as the main instrument and the data was analyzed using the Statistical Package in the Social Science Software (SPSS) version 20.0. The researcher distributed 96 questionnaires to the support staff employees at PermodalanNasionalBerhad (Kuala Lumpur). Eighty (80) support staff employees responded the questionnaire. However, a normality test was conducted and it was found that there were 3 extreme outliers. These three respondents were removed to normalize the score as suggested by Mahalanobis test. Therefore, the rate of response was 80%. The findings showed that there was a relationship between perceived ease of use of electronic document towards job performance. The result of the study also showed that support staff attitudes are the key elements that influence technology acceptance on electronic document towards support staff job performance. © 2013 IEEE. Source


Ali M.A.M.,UniversitiTeknologi | Tahir N.M.,UniversitiTeknologi
Proceedings - 2014 IEEE 10th International Colloquium on Signal Processing and Its Applications, CSPA 2014 | Year: 2014

Many researchers realised that iris as biometrics is the most accurate means for recognition since iris of human contain uniquepatterns. Hence in this study, we used Gabor filter as feature extraction to evaluate the possibility of extracting half iris for recognition with Support Vector Machine as classifier. Initial findings based on experimental analysis conducted showed that the proposed method is suitable with half iris as input based on performance attained specifically FAR and FRR of 0.21% and ERR of 99.56%. Thus, this technique could be used to overcome occlusion due to eyelids and eyelashes during segmentation. © 2014 IEEE. Source


Memon J.,UniversitiTeknologi | Abd Rozan M.Z.,UniversitiTeknologi | Uddin M.,Asia University | Abubakar A.,International Islamic University Malaysia | And 2 more authors.
International Review on Computers and Software | Year: 2014

Cryptography refers to protecting transmitted information from unauthorized interception or tampering, while cryptanalysis is art of breaking such secret ciphers and reading information, or perhaps replacing it with different information. The research highlights a new encryption technique called randomized text encryption. The algorithm proposed increases the complexity of cryptanalyst to decrypt the ciphertext and restricts them to break the security of encoded file. The proposed technique uses random numbers added to plaintext along with encryption key. After applying encryption technique, each time same plaintext will be converted to different ciphertext provided that encryption key is same or different. Two different characters are generated against single character of plaintext that doubles the size of encrypted text. Decryption process doesn't require random numbers but only needs encryption key to decipher the encrypted text. Consequently, the proposed technique is safe to different cryptanalytic attacks like Frequency analysis, Brute-Force, Linear and Differential Cryptanalysis. © 2014 Praise Worthy Prize S.r.l. - All rights reserved. Source


Hashim N.,UniversitiTeknologi | Hamzah N.,UniversitiTeknologi | Abdul Latip M.F.,UniversitiTeknologi | Sallehhudin A.A.,Advanced Power Solutions Sdn. Bhd
Proceedings - 3rd International Conference on Intelligent Systems Modelling and Simulation, ISMS 2012 | Year: 2012

Transient Stability Analysis (TSA) is a major analysis in the operation of power systems, due to the increasing stress on power system networks. One of the main goals of this analysis is to gather critical information, such as critical clearing time (tCCT,) of the circuit breakers for faults in the system. tCCT is defined as the maximum time between the fault initiation and its clearing, such that the power system is transiently stable. This paper presents a transient stability analysis of the IEEE 14 bus test system using Dynamic Computation for Power Systems (DCPS) software package. This C++ based software package has the ability to handle systems up to 1000 buses and 250 generators, providing an alternative to expensive commercial software packages. To analyze the effect of the distance of the fault location and critical clearing time on the system stability, a three-phase fault has been applied at five different locations in the system. The stability of the system has been observed based on the simulation graphs of terminal voltage, machine's rotor angle, machine's speed and output electrical power. The simulation results showed that tCCT decreases as the fault location becomes closer to the main generator. © 2012 IEEE. Source

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