2,181 research outputs found
PROFESSOR DR. SYED AZHAR RECEIVES INTERNATIONAL AWARD
Get PDFSM, PENANG, 8 March 2016 – Professor Dr. Syed Azhar Syed Sulaiman, who lectures at the
School of Pharmaceutical Sciences, Universiti Sains Malaysia (USM) has been acknowledged for
his expertise in the field of Clinical Pharmacy, in conjunction with the 50 Years Golden Jubilee
celebration of the Pharmacy Faculty at the University of Khartoum in Sudan recently
Design of LDPC Decoder for Error Correction in Memory Devices
No full textNAND flash memories are used in large number of electronic devices for storing data. The ever increasing demand of the high storage in these devices has resulted in high density NAND flash memories. The high density is achieved through the process of continuous technology scaling and the use of multilevel cell (MLC) technology. In multilevel cell technology more than one bits are stored in a single cell of the flash memory. However, this increased storage density has come at a price of reduced reliability. The raw bit error rate has increased rapidly in high density flash memories, therefore, demanding more powerful error correcting codes. The bit error rate (BER) requirements in NAND flash memories are reported to be 10^−13 to 10^−16, after applying the error correcting code. The current practice is to use the hard decision error correcting codes in NAND flash memories, such as BCH codes. However, as the raw bit error rate is getting worse, these hard decision codes will not be able to achieve the BER requirements of these memories. Therefore, more powerful error correcting codes with soft decision decoding algorithm are required. Among the soft decision codes, low density parity check codes (LDPC) can be a promising candidate for error correction in high density NAND flash memories due to their excellent error correction performance close to the Shannon limit. LDPC codes employed in NAND flash memories have large block lengths and very high code rate and should show good error correcting and error floor performance. Evaluating the error floor performance of these codes at very low frame error rates, typically around 10^−9 to 10^−10, require the use of high speed hardware simulators. Due to the reconfigurability and high speed, field programmable gate arrays (FPGAs) are largely used for evaluating the performance of LDPC codes. This thesis presents an FPGA based simulator system for evaluating the error correction and error floor performance of regular quasi cyclic (QC) LDPC Codes, for the application of large page size MLC NAND flash memories. Particularly, we targeted the algebraic QC-LDPC codes, which have high code rates and good error correcting and error floor performance. A generalized, high throughput and resource efficient hardware implementation of the QC-LDPC encoder and the decoder is given on FPGA. The proposed decoder can decode any regular QC-LDPC code including very high circulant weight QC-LDPC codes, such as euclidean geometry (EG) LDPC codes. The generalized and high throughput implementation of such large circulant weight QC-LDPC codes is not reported previously in the open literature. Moreover, the encoder and decoder hardware implementations are given on FPGA for very large page size (8 KB) of NAND flash memory, which are also not dealt previously in the open literature. A high speed and high quality floating point additive white Gaussian noise channel is implemented on FPGA using the high level synthesis method. The high level synthesis is used to rapidly prototype the channel on FPGA and to lower the development time of the LDPC simulator system. The very low consumption of the logic resources by the channel also enabled us to instantiate many channel modules in parallel, resulting in high throughput of the simulator. This thesis also presents the FPGA implementation and simulation results of two algebraic QC-LDPC codes for the page size 8 KB of NAND flash memory. Simulation results show good error correcting and error floor performance of the developed codes making them a promising candidate for error correction in NAND flash memorie
Wood deterioration by fungi / Syed Azhar Syed Ab Aziz
Get PDFWood is a biological material and subject to decay, insect, and marine borer attack. Fungi are the major biotic agents in wood deterioration. As the wood have the higher value and important to world economy, their damage directly gives the effects to the industry to become higher losses. However, when wood is used in a more or less permanent application, it must be protected from biological degradation. Treating wood with the appropriate preservative increases its service life, and also helps to conserve our nation's timber resources. Treated wood has long been used for products such as crossties and pilings, and many new applications that have been developed today. Wood preservation also should be upgraded and study to make sure the wood quality in secured and environment ecosystem will be protected
Monopole with defect ground structured (DGS) antenna for BCWC application: article / Syed Shamsul Azhar Syed Othman
Get PDFThis paper presents the comparison between monopole antenna with Defected Ground Structured (DGS) and conventional monopole antenna. The printed monopole antenna proposed to operate at 2.45GHz Industrial, Scientific and Medical (ISM) band with the application for body-centric wireless communications (BCWC) [1]. The antenna was designed and simulated using the Computer Simulation Technology (CST) microwave studio. The substrate of the antenna was fabricated using RT5807 with dielectric constant and height of 2.33 and 0.504 mm respectively. The monopole antenna is added with a DGS by using double H-shape DGS at the ground plane to contributes the performances of monopole antenna. The result shows that the monopole antenna with DGS gives better performance in term of return loss, antenna size, gain and directivity
sj-pdf-2-imr-10.1177_03000605231208598 - Supplemental material for Impact of brief smoking cessation intervention on quitting rate and glycemic control in patients with diabetes: a randomized controlled trial
No full textSupplemental material, sj-pdf-2-imr-10.1177_03000605231208598 for Impact of brief smoking cessation intervention on quitting rate and glycemic control in patients with diabetes: a randomized controlled trial by Albaroodi K.A. Ibrahim, Syed Azhar Syed Sulaiman, Ahmed Awaisu and Asrul Akmal Shafie in Journal of International Medical Research</p
sj-pdf-1-imr-10.1177_03000605231208598 - Supplemental material for Impact of brief smoking cessation intervention on quitting rate and glycemic control in patients with diabetes: a randomized controlled trial
No full textSupplemental material, sj-pdf-1-imr-10.1177_03000605231208598 for Impact of brief smoking cessation intervention on quitting rate and glycemic control in patients with diabetes: a randomized controlled trial by Albaroodi K.A. Ibrahim, Syed Azhar Syed Sulaiman, Ahmed Awaisu and Asrul Akmal Shafie in Journal of International Medical Research</p
Supplemental Material, Interview_Guide - Facilitators and Barriers Affecting Adherence Among People Living With HIV/AIDS: A Qualitative Perspective
No full textSupplemental Material, Interview_Guide for Facilitators and Barriers Affecting Adherence Among People Living With HIV/AIDS: A Qualitative Perspective by Syed Imran Ahmed, Maryam Farooqui, Syed Azhar Syed Sulaiman, Mohammad Azmi Hassali, and Christopher K. C. Lee in Journal of Patient Experience</p
Causes and Manifestations of the Perceived Behavioral Issues of Adolescents A Case Study of Learners in Secondary Schools Islamabad
Get PDFThe study aims to comprehend the adolescents’ behavioral issues and their impact on their physical and emotional
life. The theory of socialized anxiety and adolescents has been applied to this study which conceptually analyzes
the anxiety and behavioral issues of the students. The qualitative and quantitative approach was utilized in the study and adolescent
students were the targeted sample. However, for qualitative study, the teachers and parents of the adolescents were also selected for
focus group discussions. The study finds that the mood of adolescents frequently changes even in the school environment. It was also
found that adolescents do not share their emotions and problems with their parents, though they prefer their teachers and friends.
The study recommends that the gap between the parents and the adolescents must be reduced so that the adolescents could perform
more effectively and efficiently in the school environment and their social life
People's Behavior and Belief System about the Oblation Rituals at the Shrine of Shah Daulah in Gujrat, Pakistan
Get PDFThe current study aims to understand the motivations behind the devotees’ visits and oblation rituals at the shrine of Shah Daulah in Gujrat Pakistan. Social construction theory has been employed to assess the knowledge, behavior and practices of people towards the oblation ritual. A qualitative research approach was applied to collected data with the use of purposive sampling technique to approach the relevant respondents. The target audience for the study was the people who visited the shrine and offered oblation rituals. The sample size comprises of 20 people including males and females. The study found that the socio-cognitive patterns play a vital role in the construction of the knowledge about the rituals concerning shrines. Hence, the visitors of the shrine learn the rituals related to shrine from their family, religion, literature and overall society. This construction strengthens their belief system and the other way around
Career counselling: questions and answers
No full textThis informative Q&A column by educationist Syed Azhar Husnain Abidi addresses common career concerns of recent graduates from diverse academic backgrounds. Covering fields such as Renewable Energy vs Embedded Systems, Supply Chain Management vs Financial Analysis, Clinical Psychology vs Industrial-Organizational Psychology, and Climate Change Policy vs Waste Management, the responses emphasize aligning career paths with personal interests and aptitudes. Each answer outlines the scope, demand, and relevance of both fields—locally and globally—while recommending top institutions in Pakistan and abroad. The column promotes informed decision-making, guiding students toward high-potential, future-ready careers based on their strengths and preferences
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