93 results on '"Abdul Rahiman"'
Search Results
2. A hundred years of activated sludge: time for a rethink
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Abdul Rahiman Sheik, Emilie E.L Muller, and Paul eWilmes
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activated sludge ,Wastewater microbial diversity and function ,Integrated omics ,Niche engineering ,Sustainability and renewable resources ,Energy reclamation – biodiesel and bioethanol ,Microbiology ,QR1-502 - Abstract
Biological wastewater treatment plants (BWWTPs) based on the activated sludge (AS) process have dramatically improved worldwide water sanitation despite increased urbanization and industrialization. However, current AS-based operations are considered economically and environmentally unsustainable. In this Perspective, we discuss our current understanding of microbial populations and their metabolic transformations in AS-based BWWTPs in view of developing more sustainable processes in the future. In particular, much has been learned over the course of the past 25 years about specialized microorganisms, which could be more comprehensively leveraged to recover energy and/or nutrients from wastewater streams. To achieve this, we propose a bottom-up design approach, focused around the concept of a wastewater biorefinery column, which would rely on the engineering of distinct ecological niches into a BWWTP in order to guarantee the targeted enrichment of specific organismal groups which in turn will allow the harvest of high-value resources from wastewater. This concept could be seen as a possible grand challenge to microbial ecologists and engineers alike at the centenary of the discovery of the AS process.
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- 2014
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3. Roadside Intelligence: Efficient Channel Estimation for IRS-Aided mmWave Vehicular Communication
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S. Nandan and M. Abdul Rahiman
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Channel estimation ,compressive sensing ,high mobility ,intelligent reflecting surface ,millimeter wave communications ,vehicular communication ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Fifth-generation(5G) and beyond communication systems, assisted by Intelligent Reflecting Surfaces (IRS), often encounter hindrances such as unreliable connections, high energy usage, and prolonged latency. Channel estimation in IRS-aided systems is challenging in vehicular communication systems with roadside IRS units and fast-moving users. This paper proposes an efficient and low-complex channel estimation strategy for high-speed vehicular mmWave communication systems equipped with roadside IRS. The method consists of two stages, sensing and prediction, which aim to improve efficiency and accuracy under dynamic channel conditions. In the sensing phase, an initial assessment of channel characteristics is estimated by exploiting the sparse nature of the channel. We use the Compressive Sampling Matching Pursuit (CoSaMP) algorithm for accurate estimation with reduced computational complexity. The prediction stage consists of real-time tracking and prediction of the Angle of Arrival (AoA) and the Angle of Departure (AoD) using the Extended Kalman Filter (EKF). This ensures more accurate dynamic channel estimation based on predicted array response vectors without increasing the pilot overhead. Simulation results demonstrate that our proposed approach can offer precise channel estimation with significantly reduced training overhead.
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- 2024
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4. Water quality simulation using the WASP model for eutrophication control in a South Indian Reservoir
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Deepa Varsa K. C., Abdul Wahid Abdul Rahiman, Arunbabu E., Antony Kishoare J., and Priyadharshini N.
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chlorophyll-a ,dissolved oxygen ,nutrient loads ,wasp model ,water quality simulation ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
The study focused on analysing the eutrophication indicators of the Krishnagiri Reservoir Project (KRP) using the Water Quality Analysis Simulation Program (WASP). The reservoir was divided into six segments to simulate the indicators, and field measurements from 2015 to 2018 were used to calibrate the model while 2019 to 2022 were used to validate it. The results showed that the model predictions were in good agreement with the measured values, indicating the reliability of the model. The study assessed the impact of nutrient loads on dissolved oxygen, nitrate, phosphate, and chlorophyll-a. Four nutrient loading scenarios were simulated, and the most effective scenario (Scenario 4) involved a 75% reduction in nutrient load, which increased the reaeration rate by 1.47% and decreased chlorophyll-a concentrations by 88%. The study concluded that maintaining nitrates below 2.5 mg/L and phosphates below 0.75 mg/L could help restore the KRP reservoir's trophic status from hypereutrophic to mesotrophic. Overall, the study demonstrated the use of the WASP model in developing nutrient loading scenarios to manage reservoir water quality effectively. The findings could help policymakers and managers make informed decisions about reducing nutrient loads and restoring the trophic status of eutrophicated reservoirs. HIGHLIGHTS The study focused on the eutrophication management of the Krishnagiri Reservoir Project (KRP) using the Water Quality Analysis Stimulation Program (WASP) model with different nutrient load scenarios.; WASP is used to simulate the eutrophication indicators such as dissolved oxygen, chlorophyll-a, nitrate, and phosphate concentrations in the KRP reservoir.; Calibrated Eutro-model was used to develop scenarios for eutrophication management.;
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- 2023
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5. Quantification process of carbon emissions in the construction industry
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Lai, Ke En, Abdul Rahiman, Nafisah, Othman, Norazam, Ali, Kherun Nita, Lim, Yaik Wah, Moayedi, Farzaneh, and Mat Dzahir, Mohd Azwarie
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- 2023
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6. Attribute reduction based scheduling algorithm with enhanced hybrid genetic algorithm and particle swarm optimization for optimal device selection
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Nweso Emmanuel Nwogbaga, Rohaya Latip, Lilly Suriani Affendey, and Amir Rizaan Abdul Rahiman
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Computation offloading ,Mobile edge computing ,Task and resource scheduling ,Attribute reduction ,Computer engineering. Computer hardware ,TK7885-7895 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Abstract The applications of the Internet of Things in different areas and the resources that demand these applications are on the increase. However, the limitations of the IoT devices such as processing capability, storage, and energy are challenging. Computational offloading is introduced to ameliorate the limitations of mobile devices. Offloading heavy data size to a remote node introduces the problem of additional delay due to transmission. Therefore, in this paper, we proposed Dynamic tasks scheduling algorithm based on attribute reduction with an enhanced hybrid Genetic Algorithm and Particle Swarm Optimization for optimal device selection. The proposed method uses a rank accuracy estimation model to decide the rank-1 value to be applied for the decomposition. Then canonical Polyadic decomposition-based attribute reduction is applied to the offload-able task to reduce the data size. Enhance hybrid genetic algorithm and particle Swarm optimization are developed to select the optimal device in either fog or cloud. The proposed algorithm improved the response time, delay, number of offloaded tasks, throughput, and energy consumption of the IoT requests. The simulation is implemented with iFogSim and java programming language. The proposed method can be applied in smart cities, monitoring, health delivery, augmented reality, and gaming among others.
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- 2022
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7. Kidney Transplant Recipients Infected With Coronavirus Disease 2019: Retrospective Qatar Experience
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Alkadi, Mohamad M., Al-Malki, Hassan A., Asim, Muhammad, Fituri, Omar M., Hamdi, Ahmed F., Elidrisi, Rihab I., Abdul Rahiman, Ramzi, Elshirbeny, Mostafa F., Othman, Muftah A., Nauman, Awais, Ashour, Adel, Ghonimi, Tarek A., Tohid, Hiba, Jarman, Mona E., Hamad, Abdullah, Elshazly, Mohamed B., and Abuhelaiqa, Essa
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- 2021
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8. Evaluation of the neuroprotective activity of P. amarus in attenuating arsenic-induced neurotoxicity - an in vivo study
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A. Hashim, Mohammed Gulzar Ahmed, Nabeel Beeran Abdul Rahiman, Shyamjith Manikkoth, and K. Leena Pramod
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Arsenic ,Neurotoxicity ,Neurotransmitters ,Phyllanthus amarus ,Neuroprotection ,Other systems of medicine ,RZ201-999 - Abstract
Background: Arsenic is viewed as a bizarre and frightful element in human history. Recent studies showed that even low levels of arsenic can cause neurological damage. Phyllanthus amarus is an important medicinal herb proved to have neuro protective effect in experimental animals. This pre-clinical study used an animal model of arsenic toxicity and screened the different neuroprotective mechanisms of Phyllanthus amarus ethanolic extract. Purpose: To assess the effect of Phyllanthus amarus ethanolic extract on various biochemical parameter's in the brain of arsenic administered Wistar albino rats. Methodology: The neuroprotective activity of P. amarus against arsenic induced toxicity was studied in Wistar albino rats. The experimental animals (n=24) were divided into four groups of 6 rats each. Rats in group I received distilled water, whereas rats in groups II, III, and IV received arsenic as sodium arsenite salt (40 mg/kg b.w) in drinking water daily for 28 days. In addition, rats from groups III, and IV also received P. amarus ethanolic extract 100 and 200 mg/kg b.w, by intragastric route, once daily for a period of 28 days. At the end of the experiment rats were subjected to various neurobehavioral tests such as Elevated plus maze, Light dark arena, Forced swim test and Tail suspension test. After 24 h of the last treatment, the animals were euthanized and brain tissue was assayed for various biochemical parameters. Results: ANOVA and Post hoc testing of behavioral and biochemical data (Dunnett's t-test and Student unpaired T test) showed co-administration of P. amarus ethanolic extract significantly reversed anxiety and depression-like behaviors in experimental animals. P. amarus ethanolic extract effectively reduced acetyl cholinesterase activity in the brain, and it also increased the levels of dopamine and serotonin in the brains of arsenic-treated animals as compared to only arsenic treated group. P. amarus ethanolic extract significantly decreased lipid peroxidase and increased brain catalase and super oxidase dismutase activities. Conclusion: Based on the pharmacological, and biochemical analysis the plant extracts of P. amarus have shown protective effects against arsenic induced neurotoxicity.
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- 2022
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9. Investigation into the effect of data reduction in offloadable task for distributed IoT-fog-cloud computing
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Nweso Emmanuel Nwogbaga, Rohaya Latip, Lilly Suriani Affendey, and Amir Rizaan Abdul Rahiman
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Internet of things ,Fog computing ,Data compression ,Offloading ,Attribute reduction ,Computer engineering. Computer hardware ,TK7885-7895 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Abstract With the increasing level of IoT applications, computation offloading is now undoubtedly vital because of the IoT devices limitation of processing capability and energy. Computation offloading involves moving data from IoT devices to another processing layer with higher processing capability. However, the size of data offloaded is directly proportional to the delay incurred by the offloading. Therefore, introducing data reduction technique to reduce the offloadable data minimizes delay resulting from the offloading method. In this paper, two main strategies are proposed to address the enormous data volume that result to computation offloading delay. First, IoT Canonical Polyadic Decomposition for Deep Learning Algorithm is proposed. The main purpose of this strategy is to downsize the IoT offloadable data. In the study, the Kaggle-cat-and-dog dataset was used to evaluate the impact of the proposed data compression. The proposed method downsizes the data significantly and can reduce the delay due to network traffic. Secondly, Rank Accuracy Estimation Model is proposed for determining the Rank-1 value. The result of the proposed method proves that the proposed methods are better in terms of data compression compared to distributed deep learning layers. This method can be applied in smart city, vehicular networks, and telemedicine etc.
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- 2021
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10. Resource Scalability and Security Using Entropy Based Adaptive Krill Herd Optimization for Auto Scaling in Cloud
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Rahumath, Anver Shahabdeen, Natarajan, Mohanasundaram, and Malangai, Abdul Rahiman
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- 2021
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11. Development and Evaluation of Gastroretentive Bioadhesive Tablet of Atenolol Using a Naturally Occurring Biodegradable Polymer.
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Soman, Soji, Basheer, Aysha Padinhar, Mol, Geethu, Muneer, Luthfa Ahamed, Khazi Abdul Rahiman, Mariyammath Rafeeqa, Fernandes, Gasper, and Mutalik, Srinivas
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BIOPOLYMERS ,METHYLCELLULOSE ,CITRIC acid ,SODIUM bicarbonate ,BUOYANCY ,GALACTOMANNANS - Abstract
Aim: Using atenolol as a model active pharmaceutical and galactomannan from the seeds of Trigonella foenumgraecum as a mucoadhesive polymer, an effort was made to develop a gastroretentive bioadhesive floating delivery system to improve the residence time in the stomach. Materials and Methods: Different formulations were made with Hydroxypropyl Methyl Cellulose (HPMC) and galactomannan. Galactomannan was chosen because of its exceptional swelling properties in aqueous environments. In this investigation, citric acid and sodium bicarbonate were utilized as gas-producing components. Pre- and postcompression evaluations were performed on the manufactured tablets. The floating properties as well as the atenolol release pattern were investigated. Results: The extracted polymer was characterized using various techniques and found to be similar to literature. The results from GC analysis showed a residual acetone content of 0.127 ppm, indicating that the extracted polymer is safer to use in the formulation of gastroretentive tablets. The physicochemical properties of the manufactured tablets were satisfactory in terms of swelling index, release characteristics, and buoyancy pattern. All of the manufactured batches had adequate in vitro buoyancy. The gastroretentive tablet exhibited axial and radial swelling throughout the in vitro buoyancy test. According to the testing, the formulation remained buoyant for approximately 8 to 12 hr. Conclusion: According to the results of the evaluation, the manufactured tablet has a pleasing look, is heat stable, and is therapeutically efficient. F3 was determined to be the optimal formulation based on the data collected. [ABSTRACT FROM AUTHOR]
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- 2024
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12. Rosai-Dorfman disease with paravertebral and epidural thoracic spine involvement: A case report and literature review
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Abhilash Jayaram, MD, DMRD, EDiR, Nasser Jassim Al Maslamani, MD, Nazeer Ahamad Puthiyaveetil Abdul Rahiman, MD, FRCR, and Vidya Chander Negi, MD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Rosai–Dorfman disease (RDD) with spinal cord involvement is a rare clinical entity. We report a case of RDD with paravertebral and intraspinal epidural involvement in a 24-year-old male Bangladeshi patient who presented with progressive bilateral lower limb weakness for 20 days duration associated with spasticity and muscle spasm. MRI demonstrated an enhancing paravertebral soft tissue lesion extending from C7 through T4 with intraspinal epidural extension encasing the spinal cord with focal cord oedema. Histopathology of the paraspinal-epidural lesion reported a finding consistent with RDD. The patient was initiated on high-dose steroids. Follow up after 2 months demonstrated symptomatic improvement as the patient was able to move on the crutch and repeated MRI showed lesion regression. Keywords: Rosai–Dorfman disease, Tuberculosis, Lymphoma, Spinal cord
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- 2020
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13. A New Highly Secure Optical Image Security Technique Using Gyrator Transform for Image Security-Related Applications
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L. Anusree and M. Abdul Rahiman
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Optics. Light ,QC350-467 - Abstract
New methods and apparatuses for information security have evolved as a result of the rapid expansion of optical information processing. Security is one of the major issues in digital image transmission because it can deliver very secret information to any corresponding agency such as the military, biomedical, and security agencies. Previously, various techniques are proposed to perform optical image encryption techniques using different transformation and pixel-level techniques. Each work has its advantages and disadvantages in terms of computational complexity, security level, flexibility, quality, and so on. To overcome the security issues present in the previous works, a novel optical image encryption standard is proposed in this paper. This work uses information hiding followed by image encryption using Gyrator Transform (GT) using mean gradient key-based block swapping techniques. The main advantage of this work is that the key generation is dynamic and it depends upon the pixel intensity of 8 × 8 blocks. Secret information hiding is performed in the Discrete Cosine Transform (DCT) domain to protect the data against noise attacks. To analyze the performance, various evaluation metrics are used to measure the quality of the decrypted image under various distortions such as cropping and rotation. The robustness of information hiding is analyzed using a noise attack on the received image. This work achieved 45.6 dB of Peak Signal-to-Noise Ratio (PSNR) and 0.965 of Structural Similarity Index (SSIM), which is the best when compared to the conventional image encryption standards.
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- 2022
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14. Hybrid Approach to Speed-Up the Privacy Preserving Kernel K-means Clustering and its Application in Social Distributed Environment
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Lekshmy, P. L. and Abdul Rahiman, M.
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- 2020
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15. Corrosion inhibition, adsorption and thermodynamic properties of poly(vinyl alcohol-cysteine) in molar HCl
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Abdul Rahiman, Ali Fathima Sabirneeza and Sethumanickam, Subhashini
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- 2017
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16. Performance Modeling of x-Folded TM Architecture in the Presence of Transpose Traffic
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Moudi, Mehrnaz, Othman, Mohamed, Lun, Kweh Yeah, and Abdul Rahiman, Amir Rizaan
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- 2017
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17. A 3D U‐Net based two stage deep learning framework for predicting dose distributions in radiation treatment planning.
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Chandran, Lekshmy P., Kochannan Parampil Abdul Rahiman, Abdul Nazeer, Puzhakkal, Niyas, and Makuni, Dinesh
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DEEP learning , *RADIATION doses , *OROPHARYNGEAL cancer , *COMPUTED tomography , *FORECASTING - Abstract
Automation of the various steps of radiotherapy is gaining importance nowadays. Predicting the amount of radiation dose received by the tumor and nearby organs is one among them. Many deep learning architectures that predict the 3D dose distribution images from corresponding CT and contour images have been proposed in the literature. However, a detailed investigation has yet to be done on the significance of input images (CT and contour) in predicting dose distributions. This study introduces a novel two‐stage deep learning framework using a transfer learning technique for the same domain. The main objective of this approach is to accurately extract valuable information from the CT and contour images to determine the amount of radiation dose received by the organs. Training and testing are performed on the public dataset—OpenKBP, consisting of 340 oropharyngeal cancer patient data. The model performance is evaluated using the metrics dose score and DVH score. The proposed model outperforms the single‐stage deep learning models by 0.34% for the DVH score and 0.14% for the dose score. While comparing the mean dose difference between the predicted and actual dose values for each organ, the proposed model shows better performance in almost all cases. The results imply that medical professionals can utilize the predicted dose distributions to aid the optimization process in the treatment planning systems. [ABSTRACT FROM AUTHOR]
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- 2024
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18. Effects of knowledge, attitudes, and practices of poultry handlers on the prevalence of Campylobacter along the poultry production chain in Peninsular Malaysia.
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Abdul-Rahiman, U. A., Azuddin, S. N. A., Abdul-Mutalib, N. A., Sanny, M., Nor-Khaizura, M. A. R., and Nordin, N.
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CAMPYLOBACTER ,POULTRY ,POULTRY products ,POULTRY farms ,POLYMERASE chain reaction - Abstract
The present work aimed to identify the effects of knowledge, attitudes, and practices (KAP) of poultry handlers on the prevalence of Campylobacter along the poultry production chain in Peninsular Malaysia. A total of 1230 microbiological samples were collected from five companies in different Malaysian states. The sampling points involved the entire poultry supply chain from the farm to the retailer. The collected samples were subjected to bacteriological isolation and morphological identification for microbiological analyses. All Campylobacter-positive samples were further confirmed with molecular identification by using a polymerase chain reaction. Campylobacter prevalence in poultry farms, processing plants, and retailers were identified. For the KAP survey, 300 respondents answered a questionnaire evaluating their levels of KAP regarding food safety while handling live birds and subsequently poultry products after slaughtering. Overall, the mean KAP scores of the workers at farms, processing plants, and retail outlets were assessed. The survey data indicated that even though the overall KAP levels of the poultry workers were excellent, the bacterial prevalence of Campylobacter was still high. In conclusion, the KAP of poultry handlers had insignificant effects on the prevalence of Campylobacter along the poultry production chain in Peninsular Malaysia. [ABSTRACT FROM AUTHOR]
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- 2023
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19. Corrosion inhibition, adsorption and thermodynamic properties of poly(vinyl alcohol-cysteine) in molar HCl
- Author
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Ali Fathima Sabirneeza Abdul Rahiman and Subhashini Sethumanickam
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Mild steel ,Poly(vinyl alcohol-cysteine) ,Weight loss ,Polarization ,Impedance spectroscopy ,El-Awady isotherm ,Chemistry ,QD1-999 - Abstract
Chemical synthesis of water soluble conducting polymer composite poly(vinyl alcohol-cysteine) [PVAC] was carried out in oxalic acid medium using ammonium persulfate. The composite was characterized by UV, FTIR and SEM–EDX. The corrosion inhibition performance of PVAC on mild steel in molar hydrochloric acid solution was studied by weight loss and electrochemical methods. A maximum inhibition efficiency of 94% was observed in the presence of 0.6 wt% of the inhibitor. The influence of inhibitor concentration, solution temperature, and immersion time on the corrosion of mild steel has been investigated. Polarization measurements showed the mixed type inhibitive nature of the polymer composite. The results obtained from the different methods are in good agreement. The various kinetic and thermodynamic parameters of metal dissolution and composite adsorption processes were evaluated from the weight loss methods in order to elaborate the adsorption mechanism. Adsorption of inhibitor obeyed El-Awady adsorption isotherm.
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- 2017
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20. Kidney Transplant Recipients Infected with Coronavirus Disease 2019: Retrospective Qatar Experience
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Mohamad M, Alkadi, Hassan A, Al-Malki, Muhammad, Asim, Omar M, Fituri, Ahmed F, Hamdi, Rihab I, Elidrisi, Ramzi, Abdul Rahiman, Mostafa F, Elshirbeny, Muftah A, Othman, Awais, Nauman, Adel, Ashour, Tarek A, Ghonimi, Hiba, Tohid, Mona E, Jarman, Abdullah, Hamad, Mohamed B, Elshazly, and Essa, Abuhelaiqa
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Adult ,Male ,COVID-19 Testing ,COVID-19 ,Humans ,Female ,Middle Aged ,Kidney Transplantation ,Qatar ,Transplant Recipients ,Article ,Aged ,Retrospective Studies - Abstract
Introduction : This study aimed to evaluate the incidence of coronavirus disease 2019 (COVID-19) infection on kidney transplant, mortality, and risk factors associated with infection acquisition and severe illness in kidney transplant recipients with COVID-19. Methods : Among 693 kidney transplant recipients who reported to our center, 249 were tested for COVID-19 by throat and nasal swab reverse transcription polymerase chain reaction. Of these, 43 and 206 recipients tested positive and negative, respectively. Among the 43 positive recipients, nine were treated within an isolation facility, 25 were admitted to the hospital, and nine were admitted to the intensive care unit (ICU). Risk factors associated with positive results and ICU admission were evaluated. Results : COVID-19 was found in 6% of transplant recipients. Asian ethnicity (P=0.003), history of hypertensive nephropathy (P=0.01), AB blood group (P=0.04), and higher tacrolimus trough levels (P=0.007) were more frequent in the COVID-19 positive than in the COVID-19 negative group. ICU admission was more frequent in recipients presenting with fever, shortness of breath, and acute allograft dysfunction. Renal replacement therapy was required in 3 (7%) of 43 recipients, and mortality was reported in 1 (2.3%) recipient. Acute allograft dysfunction was an independent risk factor for severe COVID-19 (odds ratio 93.7 [95% confidence interval 2.37-3710.94], P=0.02). Conclusion : Higher tacrolimus targets may be associated with COVID-19 development. Acute kidney injury during the COVID-19 course may be a sign of severe disease. Prognostication of COVID-19 severity in kidney transplant recipients is crucial for early recognition of critical illness and may ensure early intervention.
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- 2021
21. A Methodology to Evaluate the Effectiveness of Designers' Cognitive Process when Using Multi-user Virtual Reality.
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binti Azizo, Adlin Shaflina, binti Ali, Kherun Nita, Iahad, Noorminshah Binti A., Binti Mohd, Norhazren Izatie, Mat Dzahir, Mohd Azwarie Bin, and Abdul Rahiman, Nafisah Binti
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- 2022
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22. D-Robot
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Masood, Abdul Rahiman, M. Abhilash, Kulal, Varshitha, and Chandy, Marina
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L293D motor driver ,Arduino Uno ,Arduino IDE ,Bluetooth module HC-05 ,Ultrasonic sensors ,DC motors - Abstract
A machine resembles a human being and able to replicate certain human movements and functions automatically. It is designed to execute one or more tasks automatically with speed and precision. Without human error, they can more efficiently perform tasks at a consistent level of accuracy. Everywhere we see officials circulating information through notices with the help of some peons or attenders etc., which needs manpower. Now-a-days we find very few people working as attenders. This robot will be a perfect replacement for the tasks done by the attenders. The information sent by the sender will be carried to the receiver without the human control. Once the input is given, the robot should work without the human control and circulate the information given by the sender to the destination. The input given by the user can be a keypad entry, text input or voice commands. The input can also be sent by means of wireless communications like Bluetooth or Wi-Fi. The processor processes the input and sends the signal accordingly. The user will place the hardcopy on the panel and provides the address of the destination. The processor will make the robot move towards the destination. When the receiver collects the notice, the robot will return back to the starting point if the push button is pressed. Once the input is given, the robot should work without the human control and circulate the information given by the sender to the destination.
- Published
- 2020
23. Modified SVPWM algorithm for three level VSI with synchronized and symmetrical waveforms
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Beig, Abdul Rahiman, Narayanan, G., and Ranganathan, V.T.
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Algorithms -- Usage ,Electric distortion -- Control ,Harmonics (Electric waves) -- Evaluation ,Pulse-duration modulation -- Methods ,Electric inverters -- Design and construction ,Induction electric motors -- Control ,Induction electric motors -- Design and construction ,Algorithm ,Business ,Computers ,Electronics ,Electronics and electrical industries - Abstract
The objective of the present work is to improve the output waveform of three level inverters used in high-power applications, where the switching frequency is very low. This is achieved by maintaining the synchronization, half-wave symmetry, quarter-wave symmetry, and three-phase symmetry in the pnisewidth modulation (PWM) waveforms. The principles of achieving synchronization and symmetries in terms of space vectors for three level inverters are presented. A novel synchronized space vector pulsewidth modulation (SVPWM) algorithms is proposed and verified experimentally. The experimental waveforms of the inverter output voltage and motor no load current for different operating conditions of the drive are presented. The performance measure in terms of the weighted total harmonic distortion (THD) of the line voltage is computed for the linear modulation region of the drive for the proposed algorithm and compared with that of synchronized SVPWM and synchronized sine-triangle pulsewidth modulation (SPWM) technique. The comparative results show that consideration of synchronization and symmetry results in improved THD. Another significant feature of the proposed algorithm is that the symmetry and synchronization leads to self-balancing of the direct current (dc) bus capacitor voltages over every one third cycle of the fundamental. Index Terms--Harmonic distortion, induction motor drives, pulsewidth modulated inverters, pulsewidth modulation.
- Published
- 2007
24. Wound healing activity of embelin isolated from the ethanol extract of leaves of Embelia ribes Burm.
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Kumara Swamy, H.M., Krishna, V., Shankarmurthy, K., Abdul Rahiman, B., Mankani, K.L., Mahadevan, K.M., Harish, B.G., and Raja Naika, H.
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- 2007
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25. A novel CSI-fed induction motor drive
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Beig, Abdul Rahiman and Ranganathan, V.T.
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Induction electric motors -- Research ,Power electronics -- Research ,Pulse-duration modulation -- Research ,Business ,Electronics ,Electronics and electrical industries - Abstract
Current source inverter (CSI) fed drives are employed in high power applications. The conventional CSI drives suffer from drawbacks such as harmonic resonance, unstable operation at low speed ranges, and torque pulsation. This paper presents a novel CSI drive which overcomes all these drawbacks and results in sinusoidal motor voltage and current even with CSI switching at fundamental frequency. The proposed CSI drive uses a three-level inverter as an active filter across motor terminals replacing the bulky ac capacitors used in the conventional drive. A sensorless vector controlled CSI drive based on proposed configuration is developed. The simulation and experimental results are presented. Experimental results show that the proposed drive has stable operation even at low speeds. Comparative results show that the proposed CSI drive has improved torque ripple compared to the conventional configuration. Index Terms--Active filters, current control, current source inverters (CSI), harmonic distortion, induction motor drives, multi-level inverters, pulsewidth modulation (PWM).
- Published
- 2006
26. Efficient Resource Management for Uplink Scheduling in IEEE 802.16e Standard
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Amir Rizaan Abdul Rahiman, Noaman Abduljabbar Ramadhan, Zuriati Ahmad Zulkarnain, and Abdullah Muhammed
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Earliest deadline first scheduling ,WiMAX ,IEEE 802 ,Physics and Astronomy (miscellaneous) ,Computer science ,Real-time computing ,QoS ,lcsh:Technology ,Fair-share scheduling ,Wireless broadband ,Management of Technology and Innovation ,lcsh:Science ,Engineering (miscellaneous) ,business.industry ,Scheduling ,lcsh:T ,Quality of service ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,Algorithm ,lcsh:Q ,IEEE 802.11e-2005 ,business ,Computer network ,IEEE 802.11r-2008 ,Broadband wireless access - Abstract
The IEEE 802.16e standard, known as mobile Worldwide Interoperability for Microwave Access (WiMAX) becomes the most demanding broadband wireless access (BWA) technology recently. Its main advantage is rapid delivery of services in remote areas due to the cost efficiency factor. The base station (BS) supports data rate up to 70 Mbps, mobile stations with 5–15 km length of coverage, and for the fixed stations the wireless access range up to 50 km. To resolve the bandwidth contention issue and guarantee seamless packet transmission from the subscriber stations (SS) to the BS, the uplink (UL) traffic scheduling must be efficient and reliable. This paper studies the work on the UL scheduling algorithm, namely minimum rest time (MRT). The MRT goal is to strengthen the packet transferring time between the SS and the BS by refining the pre-stipulated expired time and the deadline time of the earliest expiry first (EEF) and earliest deadline first (EDF) hybrid algorithms. These legacy algorithms are inadequate to support the multi-class traffic systems due to the shortage of quality of service (QoS) parameters featuring. Moreover, the algorithms are highly static. Using the Omnet++ with the relevant performance metrics the obtained results confirmed the MRT outperforms effectively from the legacy algorithms.
- Published
- 2017
27. Resourceful Residual Energy Consumption in TDMA Scheduling for IoT-based Wireless Sensor Network
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Ashikul Islam, Amir Rizaan Abdul Rahiman, and Md. Noor Derahman
- Subjects
Physics and Astronomy (miscellaneous) ,computer.internet_protocol ,Computer science ,business.industry ,lcsh:T ,Node (networking) ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,Time division multiple access ,Energy consumption ,lcsh:Technology ,Neighbor Discovery Protocol ,Scheduling (computing) ,Time-division multiplexing ,Management of Technology and Innovation ,lcsh:Q ,business ,lcsh:Science ,Engineering (miscellaneous) ,computer ,Wireless sensor network ,5G ,Computer network - Abstract
Recently, wireless sensor network (WSN) gets more concern due to the robustness in the latest communication technology iteration such as big data, IoT and 5G. Such daily usage of these technologies includes smart home, smart farming, smart traffic control etc. Moreover, WSN becomes the best preference for mobile objects in data accumulating in a wild range area. Routing distance, signal interference and routing computational cost give a significant impact to the WSN nodes lifetime. Unsynchronized node time allocation slot and neighbor discovery are the main factors in the energy consumption issue faced by the WSN. Higher energy consumption reduces the network lifetime and WSN nodes performance. This paper discusses the optimization of energy-topology (E-T) factors for distributed time division multiplexing algorithm (TDMA) slot scheduling for high-speed data link capacity. The E-T factor is based on the influence of residual energy and topology on the time slot allocation. Both node residual energy and topology information have shown a respectable impact on the TDMA node slot allocation. Moreover, the numbers of neighbors and the network residual energy have been proved both nodes execution time and energy utilization can be reduced in the algorithm. The algorithm performance has been evaluated based on the previous experiment parameters with new high-speed data link. The experimental results have shown a significant improvement in residual energy consumption for the proposed optimized TDMA slot allocation.
- Published
- 2019
28. Staphylococcus Aureus Pigment Bio Colour as a Novel Antibacterial Agent Against Staphylococcus Aureus Isolate from Coins
- Author
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Ayisha Begum, M. K. Aishwarya, Aeliya Zehra. M, Achiffa Abdul Rahiman, and R. Ushasri
- Subjects
Carotenoid ,Staphyloxanthin ,MHA ,Microbiology - Abstract
The pathogen Staphylococcus aureus is Gram positive cocci in clusters which forms golden colony on Nutrient agar. The most important characteristic feature of Staphylococcus aureus is its yellow to orange colour due to production of Staph ylox an thin. Staphyloxanthin is membrane bound Carotenoid and plays an important role in antimicrobial activity. The aim of the present study was to detect the role of Staphyloxanthin pigment production from S. aureus isolates against Staphylococcus aureus isolate from coin proving antagonistic property. The crude ethanol pigment was used against staphylococcus aureus in different concentrations ranging from 500µl to 62.5 µl by well diffusion method. Minimum inhibition was found to be 11mm at concentration range of 500. µl. The current study reported that coin plays an important role s transmitting infections Ayisha Begum | M. K. Aishwarya | Aeliya Zehra. M | Achiffa Abdul Rahiman | R. Ushasri "Staphylococcus Aureus Pigment-Bio Colour as a Novel Antibacterial Agent Against Staphylococcus Aureus Isolate from Coins" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: https://www.ijtsrd.com/papers/ijtsrd15918.pdf
- Published
- 2018
29. A CASE OF ALLERGIC BRONCHO PULMONARY ASPERGILLOSIS, MIMICKING TUBERCULOSIS
- Author
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Abdul Sathar Ariyal Abdul Rahiman and Remya Reveendran
- Subjects
Tuberculosis ,business.industry ,lcsh:R5-130.5 ,Immunology ,medicine ,Broncho-pulmonary ,aspergillosis ,medicine.disease ,Aspergillosis ,business ,mimicking tuberculosis ,lcsh:General works - Abstract
PRESENTATION OF CASE Aspergillus, a ubiquitous fungus, causes a wide spectrum of illnesses, ranging from asthma to more lethal invasive aspergillosis. Usual route of entry is via inhalation. More than hundred and fifty species are identified. And of these Aspergillus fumigatus is responsible for more than ninetyfive percent of aspergillus related illnesses. Allergic bronchopulmonary aspergillosis (ABPA) is the1 best recognized clinical entity and was first reported in 1982. ABPA is commonly seen in patients with asthma and cystic fibrosis. ABPA frequently masquerades as pulmonary tuberculosis. Patients usually come with fever, haemoptysis, expectoration of brownish mucus plugs, and wheezing. Thirty percent of patients present with heamoptysis.2 A 21-year-old female brought to the emergency room with complaints of cough, haemoptysis, breathlessness, on and off fever for fourteen days. She gave the history of episodic wheezing, breathlessness, for the last eleven years; and she had required hospital admissions with these symptoms on several occasions. She had been taking regular inhaler medications.
- Published
- 2019
30. Holistic Approaches to Reducing Salmonella Contamination in Poultry Industry.
- Author
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Abdul-Rahiman, Ummu Afiqah, Nordin, Noordiana, Abdul-Mutalib, Noor Azira, and Sanny, Maimunah
- Subjects
- *
CONTAMINATION of poultry , *POULTRY industry , *POULTRY processing plants , *SALMONELLA , *POULTRY processing , *SALMONELLA enterica , *CURRENT good manufacturing practices - Abstract
Salmonella are widely found in the poultry industry, which subsequently may pose a risk to animal and human health. The aim of this review is to highlight strategies for the prevention and control of Salmonella at each stage in the poultry production chain by monitoring risks from the farm to the retailer. Among the primary approaches for control of Salmonella at the farm level includes the administration of synthetic and natural compounds to live chickens (vaccination and antibiotic), litter management as well as fortification of feed and acidification of drinking water. In the poultry processing plant, multiple hurdle technology and different chilling conditions to reduce Salmonella were discussed. In the retail level, an effective monitoring program to control Salmonella contamination by good manufacturing practices and hazard analysis and critical control points has been reviewed. Overall, we conclude that these approaches play a role in reducing the dissemination of Salmonella in the poultry industry. However, there is no published data related to logistic scheduling of poultry processing. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
31. Corrosion inhibition, adsorption and thermodynamic properties of poly(vinyl alcohol-cysteine) in molar HCl
- Author
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Subhashini Sethumanickam and Ali Fathima Sabirneeza Abdul Rahiman
- Subjects
Vinyl alcohol ,Weight loss ,Chemistry(all) ,020209 energy ,General Chemical Engineering ,Composite number ,Oxalic acid ,Inorganic chemistry ,Impedance spectroscopy ,Hydrochloric acid ,02 engineering and technology ,Electrochemistry ,Corrosion ,Mild steel ,lcsh:Chemistry ,chemistry.chemical_compound ,Adsorption ,Polarization ,0202 electrical engineering, electronic engineering, information engineering ,Poly(vinyl alcohol-cysteine) ,El-Awady isotherm ,General Chemistry ,021001 nanoscience & nanotechnology ,chemistry ,lcsh:QD1-999 ,Chemical Engineering(all) ,Ammonium persulfate ,0210 nano-technology - Abstract
Chemical synthesis of water soluble conducting polymer composite poly(vinyl alcohol-cysteine) [PVAC] was carried out in oxalic acid medium using ammonium persulfate. The composite was characterized by UV, FTIR and SEM–EDX. The corrosion inhibition performance of PVAC on mild steel in molar hydrochloric acid solution was studied by weight loss and electrochemical methods. A maximum inhibition efficiency of 94% was observed in the presence of 0.6 wt% of the inhibitor. The influence of inhibitor concentration, solution temperature, and immersion time on the corrosion of mild steel has been investigated. Polarization measurements showed the mixed type inhibitive nature of the polymer composite. The results obtained from the different methods are in good agreement. The various kinetic and thermodynamic parameters of metal dissolution and composite adsorption processes were evaluated from the weight loss methods in order to elaborate the adsorption mechanism. Adsorption of inhibitor obeyed El-Awady adsorption isotherm.
- Published
- 2017
32. Submental Approach for Tracheal Intubation - An Alternative to Short-Term Tracheostomy in Patients with Panfacial Fractures: A Case Report
- Author
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Aboo Abdul Rahiman Ramzi and Malavica Kulkarni
- Subjects
lcsh:RD78.3-87.3 ,lcsh:Anesthesiology ,lcsh:Medical emergencies. Critical care. Intensive care. First aid ,submental endotracheal intubation ,lcsh:RC86-88.9 ,Difficult Airway ,panfacial fractures - Abstract
Intubating a patient with panfacial fractures is always a challenge to the anesthesiologist as both the anesthesiologist and the surgeon are essentially competing for the same space. The anesthetic management of a 19-year-old boy who presented with multiple maxillofacial injuries, pneumocephalus, and cerebral edema sustained during a road traffic accident has been described. He was posted for open reduction and internal fixation of the fractures, frontal sinus fracture elevation and basal repair which required access to scalp, mouth and the nose. As all the conventional modalities to secure airway seemed unsuitable, orotracheal intubation was done via submental route. Following intravenous induction the patient was intubated with a cuffed oral flexometallic tracheal tube. This was then modified to the submental route through a submental incision. The surgery proceeded uneventfully and the patient was extubated a day later in the ICU. He made a satisfactory recovery and the submental scar healed without complication or scarring. We briefly review the technique of submental intubation in adults which serves as an excellent alternative to tracheostomy.
- Published
- 2017
33. 3-(1H-Indol-3-yl)-2-benzofuran-1(3H)-one
- Author
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S. Naveen, R. Anil Kumar, K. M. Mahadevan, M. Abdul Rahiman, Ismail Warad, M. N. Kumara, and Neratur Krishnappagowda Lokanath
- Subjects
Indole test ,crystal structure ,Hydrogen bond ,Crystal structure ,Dihedral angle ,indoles ,010402 general chemistry ,010403 inorganic & nuclear chemistry ,Ring (chemistry) ,hydrogen bonding ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,Crystallography ,chemistry ,Furan ,lcsh:QD901-999 ,lcsh:Crystallography - Abstract
In the title compound, C16H11NO2, the benzofuran and indole ring systems are nearly orthogonal, subtending a dihedral angle of 86.55 (4)°. The crystal structure features an N—H...O hydrogen bond, which leads to the formation of chains propagating along thea-axis direction.
- Published
- 2017
34. Brief History of Scientific Progress of South Kanara
- Author
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M N Madhyastha, M Abdul Rahiman and K M Kaveriappa
- Subjects
lcsh:Q ,lcsh:Science - Abstract
Brief History of Scientific Progress of South Kanara
- Published
- 2015
35. Gradient based fractal image compression using Cayley table.
- Author
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Sheeba, K. and Abdul Rahiman, M.
- Subjects
- *
IMAGE compression , *AFFINE transformations , *FRACTAL analysis , *COMPUTATIONAL complexity , *ABSOLUTE value , *DIAGNOSTIC imaging - Abstract
• Encoding complexity in fractal image compression is reduced by adopting a prediction method. • Relative geometric transformation is determined using a gradient. • Affine transformation is predicted using Cayley Table. • Score value calculation reduces the number of mean square error calculation. Encoding complexity reduction is an active area of research in the field of fractal image compression. In this proposed method, affine transformation is predicted to reduce the computational complexity and score value is calculated to further minimise the number of computations in the exhaustive process of encoding. In this hybrid wavelet- fractal image compression, relative geometric transformation of range and domain blocks is determined using a reference matrix as G R and G D respectively. Then affine transformation is predicted as the geometric composition of G R and G D , using Cayley table. Score value is defined individually for domain and range blocks. It is the absolute value of maximum change in the intensity in the respective block. An important merit of this proposed method is that the encoding time is highly reduced in comparison to other recent fractal coding techniques, with a better value of PSNR. This method is 641 times faster than Standard fractal image compression method (SFIC). Cayley table is utilized for the first time in fractal image compression. This lossy compression technique can be used in multimedia applications to handle the situation of limited storage space and bandwidth and also to transmit enormous amount of data with acceptable value of PSNR. As the medical images are huge in size a good lossy compression technique is required to store them in medical archives in an economical manner. Since this proposed method provides a good trade-off between compression ratio and the quality of reconstructed image, it is a better solution for the storage of medical images in an efficient manner. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
36. Comparison of haemodynamic responses to orotracheal intubation in anaesthetised and paralysed patients with simulated cervical spine injury: Airtraq® video laryngoscope versus fibreoptic bronchoscope.
- Author
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Pillai, Ajith Kumar, Muhamed, Shiyad, Giri, Manu, Shenoy, Kailasnath, Mathew, Shaji, Dugappa, Arunkumar Handittu, and Abdul Rahiman, Ramzi Aboo
- Subjects
BRONCHOSCOPY ,CERVICAL vertebrae injuries ,NEUROLOGICAL disorders - Abstract
Background: Endotracheal intubation may produce haemodynamic fluctuations which may be deleterious in patients with cardiovascular and neurological disorders. This is further worsened in patients with difficult airway. This study was conducted to compare haemodynamic fluctuations produced when intubation was done using Airtraq and fibreoptic bronchoscopy which are used in patients with anticipated difficult airway. Methodology: Prospective randomized study. Eighty patients, ASA PS 1 and 2 undergoing elective surgery were randomized into two groups – Group A and Group F. After routine induction and muscle relaxation, orotracheal intubation was done using Airtraq in Group A and fibreoptic bronchoscope in Group F. Heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP) and mean arterial pressure (MAP) were recorded at regular intervals. Duration and number of attempts for intubation were also noted Results: There was no significant difference in the average of variation in HR (p=0.384), SBP (p=0.179), DBP (p=0.746) and MAP (p=0.057) from the baseline between the two groups. Duration of intubation in FOB group (mean value of 56.98 s) was more than Airtraq® video laryngoscope group (mean value of 37.38 s) which was statistically significant. Conclusion: Use of fibreoptic bronchoscope offer no added advantage over Airtraq video laryngoscope in terms of haemodynamic response for intubation in difficult airway situation such as cervical spine injury. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
37. Assessment of serum lipid profile and electrolyte levels in Type II diabetes mellitus - A comparative study based on glycosylated hemoglobin levels.
- Author
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Abdul Rahiman, Nabeel Beeran, Bangera, Shobith, and Hameed, Sajla Shahul
- Subjects
TYPE 2 diabetes ,BLOOD lipids ,GLYCOSYLATED hemoglobin ,ELECTROLYTES - Published
- 2019
- Full Text
- View/download PDF
38. Transfer of Agricultural Technology; Structural and Functional Linkages A Study of Improved Rice Varieties
- Author
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O. Abdul Rahiman Kunju and O. Abdul Rahiman Kunju
- Abstract
This publication titled “Modern International Encyclopaedia pf Social Work” deals with the said subject of social work in its totality. This Encyclopaedia contains following 12 volumes: 1. Administration of Social Work; 2. Principles of Social Work; 3. Practices of Social Work; 4. Areas of Social Work; 5. Social Work Theories and Models; 6. Organizing Community for Social Work; 7. Social Welfare System; 8. Code of Ethics of Social Work and Social Workers; 9. Methods of Social Work and Participation; 10. Social Problems in India and Social Work; 11. Social Development, Social Policy and Social Work; 12. Social Research, Gandhi and Social Work Theory. It is anticipated that this Encyclopaedia could spark a dialogue leading ultimately to a universally accepted set of community practice techniques in social work.
- Published
- 2013
39. Repercussions Of Ritual Dances To Personal Adjustment - A Perspicacious Study Among School Children
- Author
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Abdul Rahiman Kannam Kulam
- Subjects
Kolkali ,Poorakkali ,Emotional adjustment ,Margamkali ,Ritual dances - Abstract
Reflecting the concepts of the development of the whole child, it is claimed that, purposeful engagement in Physical activities or exercise involved ritual dances has the potential to engender in young people, The purpose of the present study was to analyze school children and their personal adjustment based on Ritual dance participation. For the purpose, two thousand and three hundred school children of Kerala were analyzed. AISS manual of A.K.P Sinha and R.P Singh was used to collect the data for adjustments. The adjustment qualities classifies as Excellent, Good, Average, Unsatisfactory and Very unsatisfactory. The total performance denotes the state of adjustment based on the classifications. Findings of the study were subjected to percentages and ‘t’ ratio. The study enlightened that, the emotional, social and overall adjustments are better than non-athletes. But the study elucidated that, there is no difference in educational adjustment of school athletes and non athletes among school children., {"references":["Pakkar Pannoor, \"Mapilakalakal A brief reiview\", Mapila Kala Darpanam, Co-op works Ltd. Koottayam-1998.pp.126-127","C.N. Ahamed Maulavi, \"Mahathaya Mapila Sahithya Parambaryam\", Lipi publications, Calicut, 1978.pp. 264-268","Dr. Azeez Tharuvana, \"Wayanadan Ramayanam\", Mathrubhumi Publishing Ltd. 2011, pp. 102","K.K. Abdul Kareem, K. Aboobakkar, \"Complete works of Moinkutty Vaidyar\", Mahakavi Moinkutty Vaidyar Smaraka Committee, 2005, pp. 434-435."]}
- Published
- 2013
- Full Text
- View/download PDF
40. CODE AWARE DYNAMIC SOURCE ROUTING FOR DISTRIBUTED SENSOR NETWORK
- Author
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Arun Kumar Dubey, M. Abdul Rahiman, Nishanth Jain, and G Manoj Kumar
- Subjects
Static routing ,Dynamic Source Routing ,Computer science ,business.industry ,Distributed computing ,Policy-based routing ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,DSRFLOW ,Geographic routing ,Multipath routing ,Mobile wireless sensor network ,business ,Hierarchical routing ,Network Coding ,Wireless Sensor Network ,Computer network - Abstract
Sensor network facilitates monitoring and controlling of physical environments. These wireless networks consist of dense collection of sensors capable of collection and dissemination of data. They have application in variety of fields such as military purposes, environment monitoring etc. Typical deployment of sensor network assumes central processing station or a gateway to which all other nodes route their data using dynamic source routing (DSR). This causes congestion at central station and thus reduces the efficiency of the network. In this work we will propose a better dynamic source routing technique using network coding to reduce total number of transmission in sensor networks resulting in better efficiency.
- Published
- 2013
- Full Text
- View/download PDF
41. Virale Regulierung der Nährstoffaufnahme von Algen und Prokaryoten
- Author
-
Sheik, Abdul Rahiman, Kuypers, Marcel, and Brussaard, Corina
- Subjects
CARD-FISH ,marine bacteria ,biogeochemistry ,ddc:570 ,Marine viruses ,570 Life sciences ,biology ,Phaeocystis globosa ,nanoSIMS - Abstract
Viruses are the most abundant entities in the ocean and represent a large portion of lifes genetic diversity. As mortality agents, viruses catalyze transformations of particulate matter to dissolved forms. This viral catalytic activity may influence the microbial community structure and affect the flow of critical elements in the sea. However, the extent to which viruses mediate bacterial diversity and biogeochemical processes is poorly studied. The current thesis, using a single cell approach, provides rare and novel insights in to how viral infections of algae influence host carbon assimilation. Furthermore this thesis details how cell lysis by viruses regulates the temporal bacterial community structure and their subsequent uptake of algal viral lysates. Chapter 2 shows how viruses impair the release of the star-like structures of virally infected Phaeocystis globosa cells. The independent application of high resolution single cells techniques using atomic force microscopy (AFM) visualized the unique host morphological feature due to viral infection and nanoSIMS imaging quantified the impact of viral infection on the host carbon assimilation. Prior to cell lysis, substantial amounts of newly produced viruses (~ 68%) were attached to P. globosa cells. The hypothesis that impediment of star-like structures in infected P. globosa cells leads to enhanced grazing was proposed. The scenario of enhanced grazing is in sharp contrast to the current view that viral infections divert the organic carbon transfer from higher trophic levels (e.g., grazers). In chapter 3, during early hours of viral infection, the application of secondary-ion mass spectrometry (nanoSIMS) showed a high transfer of infected P. globosa biomass towards Alteromonas cells well before the latent period, which stimulated its initial doubling in abundance, attachment to algal cell surroundings. Following algal viral lysis, the succession of bacterial populations consisted of Alteromonas and Roseobacter cells and an efficient transfer of P. globosa viral lysates by these specific bacterial members (Day 2). The sharp increase of these two genera, which occurred in aggregate-association, declined in abundance due to plausible phage mediated lysis. The potential phage mediated lysis appeared to result in aggregate dissolution and was responsible for regeneration of dissolved inorganic carbon (55% of the particulate 13C-organic carbon) and generation of plentiful recalcitrant organic carbon. The findings such as algal leakage during infection substantiate a previously undocumented role of viruses, which appears to be responsible for alterations in the marine ecosystem process such as bacterial community structure and carbon availability. In chapter 4, it appears that viral infection of Micromonas pusilla cells led to the hindrance of pyrenoid synthesis (starch and proteins) and much of the newly assimilated material was diverted towards viral production. Viral lysis of M. pusilla led to dominance of Alteromonas cells and Bacteroidetes, where as Alteromonas cells dominated the bacterial communities in non-infected cultures through out the experiment. The ecological implication of viral mediated starch impediment in M. pusilla cells may lead to the release of labile proteins and increased levels of polysaccharides, which potentially directs the marine pelagic system to more regenerative processes.
- Published
- 2012
42. Block Cleaning Process in Flash Memory
- Author
-
Putra Sumari and Amir Rizaan Abdul Rahiman
- Subjects
Hardware_MEMORYSTRUCTURES ,business.industry ,Computer science ,Process (computing) ,Flash memory ,law.invention ,Flash (photography) ,law ,Personal computer ,business ,Computer hardware ,PC Card ,EEPROM ,Data transmission ,Block (data storage) - Abstract
Flash memory is a non-volatile storage device that can retain its contents when the power is switched off. Generally, it is a form of an electrically erasable programmable read-only memory (EEPROM) that offers several excellent features such as less noise, solid-state reliability, lower power consumption, smaller size, light weight, and higher shock resistant [1 – 5]. Flash memory acts as a slim and compact storage device. It’s main applications are such as compact flash (CF), secured digital (SD), and personal computer memory card international association (PCMCIA) cards, for storage and data transfer in most portable electronic gadgets such as mobile phones, digital cameras, personal digital assistants (PDAs), portable media players (PMPs), gobal positioning system receivers (GPS), just to name a few.
- Published
- 2011
43. Comparative Study on Rainwater Harvesting Practice Between Two Metropolise : Tokyo (Sumida-Ku) & Selangor, Malaysia
- Author
-
Nafisah, Abdul Rahiman and Matsushita, Jun
- Subjects
rainwater harvesting ,comparative study - Abstract
Rainwater Harvesting (RWH) has become one of the recent trends as a sustainable approach for supplementing public water supply as well as for serving several other purposes. Tokyo starts off the RWH practice in urban area few decades ago. In consequence, Tokyo is known for its well-developed RWH practice. Whereby, Selangor, the most developed nation in Malaysia is lack behind in implementing RWH since up till now, only several buildings are equipped with Rainwater Harvesting System (RWHS). This study aims to investigate the well-developed RWH practice in Tokyo mainly in Sumida-ku from several aspects which are policy & planning, design, technological, and social matters. Subsequently, this study compares Selangor’s efforts on such aspects for proposal of betterment.
- Published
- 2010
44. Human Proteinpedia enables sharing of human protein data
- Author
-
Ron Bose, Jean-Charles Sanchez, Young Jin Lee, Marcus Bantscheff, Pia Hønnerup Jensen, Yunping Zhu, Jonathan C. Trinidad, Juan Martínez-Heredia, Michael Moran, Samir K. Brahmachari, Pierre Gagné, Kripa Shankari, Jeffrey C. Smith, Jose-Manuel Vidal-Taboada, James P. DeLany, Shi Jun Sheng, Ragna Rönnholm, Xosé R. Bustelo, Helene L. Cardasis, Erik Björling, Ole N. Jensen, Pavel Gromov, Michael J. Dunn, Xiaoyue Wang, Guy G. Poirier, Greg T. Cantin, Richard J. Simpson, Kenny Helsens, Ming Zhou, Sumio Sugano, Samir M. Hanash, Prashantha Hebbar, Y. L. Ramachandra, Jennifer E. Van Eyk, Rafael Oliva, Philip C. Andrews, Lennart Martens, Julio E. Celis, B. Abdul Rahiman, Alexander Mehrle, Feixia Chu, Richard D. Smith, Philip A. Cole, Leroi V. DeSouza, Stefan Wiemann, Joseph A. Loo, Bernhard Kuster, Mauno Vihinen, Peter Jung, David C. Muddiman, Jayson A. Falkner, Osamu Ohara, Fredrik Levander, Gerald W. Hart, Mukhtar Ahmed, T. S. Keshava Prasad, Eric W. Deutsch, Riaz Mohmood, Indu Kheterpal, Jeffrey M. Gimble, John R. Yates, Catherine Fenselau, Timothy D. Veenstra, Julian Vasilescu, Brian M. Balgley, Heiko Hermeking, Johanna Salonen, Rainer Pepperkok, Michael Lefevre, William S. Hancock, Visith Thongboonkerd, Tao Xu, Beerelli Seshi, Christine A. Miller, Florian Gnad, Ravi Sirdeshmukh, Arnaud Droit, Renu Goel, Maarit Takatalo, Emanuel F. Petricoin, Mathias Uhlén, Vitor M. Faça, Billy Wu, Robert J. Cotter, Angelo M. De Marzo, Mark E. McComb, Alma S Burlingame, Oliver Hofmann, Martine Morzel, Rajasree Menon, Denis F. Hochstrasser, Peter James, Matthew J. Sullivan, Robin Wait, K. W. Michael Siu, H. C. Harsha, Hainard Alexandre, Megan S. Lim, Winston Hide, Kris Gevaert, Harald Mischak, Thierry Sayd, Matthias Mann, Blagoy Blagoev, Gerard Cagney, Xiangming Fang, Ralph H. Hruban, James D. Morgan, Joel S. Bader, Samuel O. Purvine, Fuchu He, Robert Moritz, Rob M. Ewing, Daniel Figeys, Min-Seok Kwon, Kumaran Kandasamy, Reiko F. Kikuno, Masaaki Oyama, Cecilia Gelfi, Gilbert S. Omenn, James P. McRedmond, Pierre Lescuyer, Kojo S.J. Elenitoba-Johnson, Akhilesh Pandey, Joël Vandekerckhove, Karin Hjernø, Subburaman Mohan, Jens Rick, Kyla Pennington, Raghothama Chaerkady, Henrik Molina, David M Horn, Faith A. Hays, Young Ki Paik, Balamurugan Periaswamy, Giulio Superti-Furga, Roman Körner, Gerard Drewes, Jun Zhong, E. Dransfield, Suresh Mathivanan, Robert H. Rice, David K. Crockett, Thomas A. Neubert, Minna Lehvaslaiho, K. Shivakumar, Catherine E. Costello, Hyoung Joo Lee, Christian Löbke, Keiryn L. Bennett, Nieves Ibarrola, Ramars Amanchy, Petra Zürbig, Vivekananda Shetty, Natalie G. Ahn, Ulrike Korf, J. Daniel Navarro, Anuradha Nalli, Prasanna Ramachandran, David J. States, Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Biological Systems Engineering, University of Wisconsin-Madison, CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria, Royal Institute of Technology [Stockholm] (KTH ), University of California [San Francisco] (UC San Francisco), University of California (UC), Boston University School of Medicine (BUSM), Boston University [Boston] (BU), Radiothérapie moléculaire (UMR 1030), Université Paris-Sud - Paris 11 (UP11)-Institut Gustave Roussy (IGR)-Institut National de la Santé et de la Recherche Médicale (INSERM), Qualité des Produits Animaux (QuaPA), Institut National de la Recherche Agronomique (INRA), Université Laval [Québec] (ULaval), British Antarctic Survey (BAS), Natural Environment Research Council (NERC), Chemistry and Biochemistry Department (University of Maryland), University of Maryland [College Park], University of Maryland System-University of Maryland System, Ottawa Institute of Systems Biology, University of Ottawa [Ottawa], Cabinet de Médecine Générale (Cabinet PG), Ville, Flanders Institute for Biotechnology, Beijing Institute of Radiation medicine, South African National Bioinformatics Institute (SANBI), University of the Western Cape (UWC), Département de science des protéines humaines [Genève], Université de Genève = University of Geneva (UNIGE)-Faculté de médecine [Genève], Donders Institute for Brain, Cognition and Behaviour, Radboud University [Nijmegen], Fraunhofer German-Sino Lab for Mobile Communications (MCI), Fraunhofer Institute for Manufacturing Engineering and Automation (Fraunhofer IPA), Fraunhofer (Fraunhofer-Gesellschaft)-Fraunhofer (Fraunhofer-Gesellschaft), Max Planck Institute for Human Cognitive and Brain Sciences [Leipzig] (IMPNSC), Max-Planck-Gesellschaft, Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), Hôpitaux Universitaires de Genève (HUG), Department of Pathology, University of Utah, University of California [Los Angeles] (UCLA), Universiteit Gent = Ghent University (UGENT), Protein Analysis for Clinical Diagnosis and Pharmaceutical Research, Mosaiques Diagnostics and Therapeutics AG, Proteomics Resource Center, Rockfeller University, Auteur indépendant, Section des Sciences de la Terre, Université de Genève = University of Geneva (UNIGE), RIKEN Research Center for Allergy and Immunology, Yokohama (RCAI), Research Unit for Immune Homeostasis, Yonsei Proteome Research Center and Department of Biochemistry, Yonsei University, European Molecular Biology Laboratory [Heidelberg] (EMBL), Department of Molecular Pathology and Microbiology, Center for Applied Proteomics and Molecular Medicine-George Mason University [Fairfax], Axe cancer, Université Laval [Québec] (ULaval)-CHUQ Research Center, The University of Arizona Medical Center, University of Arizona, The University of Tokyo (UTokyo), Research Center for Molecular Medicine of the Austrian Academy of Sciences [Vienna, Austria] (CeMM ), Austrian Academy of Sciences (OeAW), Faculty of Biological and Environmental Sciences [Helsinki], Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Medical Molecular Biology Unit, Mahidol University [Bangkok], National Cancer Institute [Bethesda] (NCI-NIH), National Institutes of Health [Bethesda] (NIH), Department of Experimental Medical Science, Lund University [Lund], Tsinghua University [Beijing] (THU), Deutsches Krebsforschungszentrum, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Institut Européen des membranes (IEM), Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Mosaiques Diagnostics & Therapeutics AG, University of California [San Francisco] (UCSF), University of California, Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Gustave Roussy (IGR)-Université Paris-Sud - Paris 11 (UP11), University of the Western Cape, Université de Genève (UNIGE)-Faculté de médecine [Genève], Radboud university [Nijmegen], Universiteit Gent = Ghent University [Belgium] (UGENT), University of Geneva [Switzerland], University of Helsinki, Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Hochstrasser, Denis, Lescuyer, Pierre, Moritz, Robert, Pepperkok, Rainer, and Sanchez, Jean-Charles
- Subjects
Proteomics ,Proteomics methods ,Internationality ,Magnetic Resonance Spectroscopy ,Proteome ,Information storage ,[SDV]Life Sciences [q-bio] ,Biomedical Engineering ,Information Storage and Retrieval ,Proteome/*chemistry/classification/*metabolism ,Bioengineering ,Computational biology ,Biology ,Bioinformatics ,Databases, Protein ,Applied Microbiology and Biotechnology ,Data type ,Peptide Mapping ,03 medical and health sciences ,User-Computer Interface ,ddc:576 ,ComputingMilieux_MISCELLANEOUS ,Database Management Systems ,Magnetic Resonance Spectroscopy/methods ,030304 developmental biology ,0303 health sciences ,Internet ,business.industry ,Peptide mapping ,Gene Expression Profiling ,030302 biochemistry & molecular biology ,Information Storage and Retrieval/*methods ,Peptide Mapping/methods ,Gene Expression Profiling/*methods ,Molecular Medicine ,The Internet ,Proteomics/methods ,business ,[SDV.AEN]Life Sciences [q-bio]/Food and Nutrition ,Software ,Biotechnology - Abstract
Proteomic technologies, such as yeast two-hybrid, mass spectrometry (MS), protein/peptide arrays and fluorescence microscopy, yield multi-dimensional data sets, which are often quite large and either not published or published as supplementary information that is not easily searchable. Without a system in place for standardizing and sharing data, it is not fruitful for the biomedical community to contribute these types of data to centralized repositories.
- Published
- 2008
45. Influence of Placement of Small Space Vectors on the Performance of PWM Techniques for Three Level Inverters
- Author
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Beig, Abdul Rahiman and Ranganathan, VT
- Subjects
Electrical Engineering - Abstract
The performance of three level inverters depends on the PWM technique. The three level space vector PWM (SVPWM) has improved performance in terms of the THD and the D.C. bus mid point voltage balance compared to three level sine triangle PWM (SPWM). The objective of this paper is to study the importance of the space vectors, the influence of their placement in the switching sequence on the performance of the PWM techniques and address the basic issue of why the SVPWM has superior performance over SPWM technique. Such a basic understanding will help in designing optimal PWM with desired performance. The study has shown that the superior performance of SVPWM is because of the placement of the small space vectors as the beginning and ending vectors in each sequence, with equal dwell times. The simulation results are presented to validate the theoretical observations. The SVPWM is implemented on a general purpose DSP based digital controller and applied to constant v/f drive.
- Published
- 2003
46. Flexible control for small power generation employing renewable energy source used in isolated communities.
- Author
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Barara, Mohamed, Bennassar, Abderrahim, Akherraz, Mohamed, Alhosan, Khalifa Hasan, Sayari, Naji Al, and Beig, Abdul Rahiman
- Published
- 2015
- Full Text
- View/download PDF
47. Sensorless closed loop V/f control of medium-voltage high-power induction motor with synchronized space vector PWM.
- Author
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Adiuku, Chimezie O., Beig, Abdul Rahiman, and Kanukollu, Saikrishna
- Published
- 2015
- Full Text
- View/download PDF
48. A cost aware commodity market approach for real-time workload in Hybrid cloud.
- Author
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Ghouchani, Babak Esmaeilpour, Abdullah, Azizol, Wati Abdul Hamid, Nor Asila, and Abdul Rahiman, Amir Rizaan
- Published
- 2015
- Full Text
- View/download PDF
49. Hardware Implementation of Voltage Control for Self Excited Induction Generator Used in Small Power Generation.
- Author
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Barara, Mohamed, Chimezie, Adiuku, Naji Al Sayari, Beig, Abdul Rahiman, Alhosani, Khalifa Hasan, Abbou, Ahmed, and Akherraz, Mohamed
- Subjects
ELECTRIC potential ,ELECTRIC currents ,ELECTRICITY ,CASCADE converters ,ELECTRICAL engineering - Abstract
With the development of controlled converter circuits and the rapid growth of independent electric power station, the self-excited induction generator (SEIG) is increasingly being used for different small power generation systems. This paper investigates the analysis and implementation of a control scheme for maintaining a single phase load RMS voltage and frequency constant, fed by self-excited induction generator under variable speed and load. The proposed control is useful for isolated small power applications such as uncontrolled small hydro turbine or wind turbine. Experimental results confirm good performance and the effectiveness of the proposed control. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
50. Automated object recognition and pattern matching analysis of runways using surface track data.
- Author
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Abdul Rahiman, M., Mahalekshmi, Monisha, C., Remya, S., Manoj Kumar, G., and Rajasree, M.S.
- Published
- 2011
- Full Text
- View/download PDF
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