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OALib Journal期刊

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Data Security of Mobile Cloud Computing on Cloud Server  [PDF]
Mohammad Waseem, Abdullah Lakhan, Irfan Ali Jamali
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1102377
Abstract: Mobile Cloud computing is a technology of delivering services, such as software, hardware (virtual as well) and bandwidth over the Internet. Mobile devices are enabled in order to explore, especially Smart phones. The mobile cloud computing technology is growing rapidly among the customers and many companies such as Apple, Google, Facebook and Amazon with rich users. Users can access their data at any time, at any place, even with any device including mobile devices by using the cloud storage services, although these properties offer flexibility and scalability in controlling data, however, at the same time it reminds us with new security threats. These security issues can be resolved by proper handling of data. The cloud server provider can secure the data by applying the encryption and decryption techniques while storing the data over the cloud. In this paper, we proposed some encryption and decryption methods for securing the data over the cloud so that an unauthorized person or machine cannot access the confidential data owing to encrypted form.
Hybrid Delay Optimization and Workload Assignment in Mobile Edge Cloud Networks  [PDF]
Abdul Rasheed Mahesar, Abdullah Lakhan, Dileep Kumar Sajnani, Irfan Ali Jamali
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104854
Abstract:
Nowadays, the usage of mobile devices is progressively increased. Until, delay sensitive applications (Augmented Reality, Online Banking and 3D Game) are required lower delay while executed in the mobile device. Mobile Cloud Computing provides a rich resource environment to the constrained-resource mobility to run above mentioned applications, but due to long distance between mobile user application and cloud server introduces hybrid delay (i.e., network delay and process delay). To cope with the hybrid delay in mobile cloud computing for delay sensitive applications, we have proposed novel hybrid delay task assignment (HDWA) algorithm. The preliminary objective of the HDWA is to run the application on the cloud server in an efficient way that minimizes the response time of the application. Simulation results show that proposed HDWA has better performance as compared to baseline approaches.
Energy Aware Task Assignment with Cost Optimization in Mobile Cloud Computing  [PDF]
Irfan Ali Jamali, Abdullah Lakhan, Abdul Rasheed Mahesar, Dileep Kumar Sajnani
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2018, DOI: 10.4236/ijcns.2018.118010
Abstract: In this paper, we are investigating the power consumption of mobile device while performing offloading system. The offloading system is way in which mobile application can be divided into local and remote execution in order to alleviate the CPU energy consumption. However, existing offloading systems do not consider data transfer communication energy while performing mobile offloading system. They have just focused on mobile CPU energy consumption. In this paper, we are investigating the energy consumption mobile CPU and communication energy collaboratively while performing mobile offloading for complex application. To cope up with the above problem, we have proposed Energy Efficient Task Scheduler (EETS) algorithm, whose aim is to determine optimal tasks execution in offloading system in order to minimize mobile CPU and communication energy. Simulation results show that EETS outperforms as compared to baseline approaches.
Latency Aware and Service Delay with Task Scheduling in Mobile Edge Computing  [PDF]
Dileep Kumar Sajnani, Abdul Rasheed Mahesar, Abdullah Lakhan, Irfan Ali Jamali
Communications and Network (CN) , 2018, DOI: 10.4236/cn.2018.104011
Abstract: In a traditional Mobile Cloud Computing (MCC), a stream of data produced by mobile users (MUs) is uploaded to the remote cloud for additional processing throughout the Internet. Though, due to long WAN distance it causes high End to End latency. With the intention of minimize the average response time and key constrained Service Delay (network and cloudlet Delay) for mobile users (MUs), offload their workloads to the geographically distributed cloudlets network, we propose the Multi-layer Latency Aware Workload Assignment Strategy (MLAWAS) to allocate MUs workloads into optimal cloudlets, Simulation results demonstrate that MLAWAS earns the minimum average response time as compared with two other existing strategies.
Bi-Criteria Optimization Technique in Stochastic System Maintenance Allocation Problem  [PDF]
Irfan Ali, S. Suhaib Hasan
American Journal of Operations Research (AJOR) , 2013, DOI: 10.4236/ajor.2013.31002
Abstract:

In this paper, the problem of optimum allocation of repairable and replaceable components in a system is formulated as a Bi-objective stochastic non linear programming problem. The system maintenance time and cost are random variable and has gamma and normal distribution respectively. A Bi-criteria optimization technique, weighted Tchebycheff is used to obtain the optimum allocation for a system. A numerical example is also presented to illustrate the computational details.

Fuzzy Geometric Programming in Multivariate Stratified Sample Surveys in Presence of Non-Response with Quadratic Cost Function  [PDF]
Shafiullah  , Mohammad Faisal Khan, Irfan Ali
American Journal of Operations Research (AJOR) , 2014, DOI: 10.4236/ajor.2014.43017
Abstract:

In this paper, the problem of non-response with significant travel costs in multivariate stratified sample surveys has been formulated of as a Multi-Objective Geometric Programming Problem (MOGPP). The fuzzy programming approach has been described for solving the formulated MOGPP. The formulated MOGPP has been solved with the help of LINGO Software and the dual solution is obtained. The optimum allocations of sample sizes of respondents and non respondents are obtained with the help of dual solutions and primal-dual relationship theorem. A numerical example is given to illustrate the procedure. 

 

Spontaneous Subcutaneous Emphysema with Pneumo-Mediastinum: A Case Report  [PDF]
Anwar Ali Jamali, Ghulam Mustafa Jamali, Niaz Hussain Jamali
Case Reports in Clinical Medicine (CRCM) , 2017, DOI: 10.4236/crcm.2017.611032
Abstract: Aim: To report a rare case of Spontaneous subcutaneous emphysema and pneumo-mediastinum Introduction: Spontaneous subcutaneous emphysema and pneumo-mediastinum may be defined as the presence of free gas or air in the subcutaneous tissue or mediastinal structures without an apparent precipitating cause. It most commonly occurs in adolescent in good physical health group devoid of severe existing lung pathology. Case Report: In our case, a middle aged married housewife was referred to Department of Medicine, Peoples Medical University Hospital Nawabshah, Sindh, Pakistan, by her local GP for the worsening of her condition due to development of acute neck pain, difficulty in breathing, eating and swallowing (mainly for solid foods) with swelling of neck. She was not complaining of any respiratory symptoms. The chest and neck radiographs showed subcutaneous emphysema and pneumo-mediastinum, there was no any evidence of air leakage from esophagus. She was subsequently put on free fluids, light diet, antibiotics, analgesia and other supportive measures along with close observation. After three days of admission, her clinical symptoms were alleviated to a great extent. She was discharged well from hospital after four days. Conclusion: Spontaneous subcutaneous emphysema with pneumo-mediastinum is medical and surgical emergency. Diagnosis may be made by routine chest X-rays and CT scan of the chest. Prompt diagnosis and immediate management may affect the morbidity and mortality outcomes in this condition.
Non Alcoholic Fatty Liver Disease: Assessment of Lipid Profile Estimation in Different Grades of Fatty Liver on Ultrasound  [PDF]
Bhojo Mal Tanwani, Anwar Ali Jamali, Ghulam Mustafa Jamali, Ameer Ali Jamali, Muhammad Ali Sohail
Open Journal of Preventive Medicine (OJPM) , 2018, DOI: 10.4236/ojpm.2018.83007
Abstract: Background: Non Alcoholic Fatty Liver Disease (NAFLD) is common hepatic disorder which is recognized as a great health problem causing different diseases worldwide. To determine non-alcoholic fatty liver and assess the relation of fasting total lipids with different grades of fatty liver (NAFLD) subjects diagnosed through ultrasound. By identifying the risk factors of Lipid Profile and NAFLD, the health care provider can properly manage it, even awareness specific for patients and community as general being launched to diminish the morbidity and mortality by this study. Methods: This cross-sectional research carried out at Medicine Department of PMCH, Shaheed Benazirabad. This study comprises 300 subjects of NAFLD. Patients who attended the medicine department with abdominal complains after examination consultant advised ultrasound. The ultrasound performed in Radiology department, patients with findings of fatty liver selected, and history taken from all the patients with special regard to alcoholism. Fasting lipid profile done in all patients included in present study. The blood samples collected from a vein and immediately sent to the laboratory. Results: This present study enlisted total 300 patients out of them 203 (67.7%) belonged to male gender and 97 (32.3%) were females. A ratio of 2.1:1 observed in male and female subjects. There were 176 (58.7%) patients in grade I, while 82 (27.3%) patients in grade II and 42 (14%) patients in grade III. The cholesterol value was abnormal in 186 (62%), while normal in remaining 114 (38%) patients. Triglycerides were abnormal in 152 (50.7%) while in 148 (49.3%) patients were normal. HDL in 155 (51.7%) patients was abnormal while 145 (48.3%) patients had normal values. Low density lipoprotein value in 117 (39%) patient was abnormal and 183 (61%) patient normal. Very low-density lipoprotein in 117 (39%) patients was abnormal and 183 (61%) patient normal. The mean age and SD of patients in present study was 46.83 ± 8.82, with minimum 30 years and maximum age 65 years respectively (p value 0.000). The mean and SD of total cholesterol value was 154.66 ± 58.88 mg/dl (p value 1.000), TG 180.98 ± 96.46 mg/dl (p value 0.974), HDL-C 32.13 ± 5.88 mg/dl (p value 0.000), LDL-C 116.41 ± 41.002 mg/dl (p value 0.000), and VLDL-C was 43.47 ± 34.34 mg/dl (p value 0.000). Conclusions: In current study, variable changes in lipid profile observed amongst NAFLD (non-alcoholic fatty liver disease) patients who diagnosed on ultrasound. Early diagnosis and treatment
Chebyshev Approximate Solution to Allocation Problem in Multiple Objective Surveys with Random Costs  [PDF]
Mohammed Faisal khan, Irfan Ali, Qazi Shoeb Ahmad
American Journal of Computational Mathematics (AJCM) , 2011, DOI: 10.4236/ajcm.2011.14029
Abstract: In this paper, we consider an allocation problem in multivariate surveys as a convex programming problem with non-linear objective functions and a single stochastic cost constraint. The stochastic constraint is converted into an equivalent deterministic one by using chance constrained programming. The resulting multi-objective convex programming problem is then solved by Chebyshev approximation technique. A numerical example is presented to illustrate the computational procedure.
Allocation of Repairable and Replaceable Components for a System Availability Using Selective Maintenance with Probabilistic Maintenance Time Constraints  [PDF]
Irfan Ali, Mohammed Faisal Khan, Yashpal Singh Raghav, Abdul Bari
American Journal of Operations Research (AJOR) , 2011, DOI: 10.4236/ajor.2011.13016
Abstract: In this paper, we obtain optimum allocation of replaceable and repairable components in a system design. When repair and replace time are considered as random in the constraints. We convert probabilistic constraint into an equivalent deterministic constraint by using chance constrained programming. We have used the selective maintenance policy to determine how many components to be replaced & repaired within the limited maintenance time interval and cost. A Numerical example is presented to illustrate the computational procedure and problem is solved by using LINGO Software.
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