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Search Results: 1 - 10 of 3324 matches for " Hasan Sarwar "
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LAPAROSCOPIC CHOLECYSTECTOMY
JAHANGIR SARWAR KHAN,HAMID HASAN,MOHAMMAD IQBAL
The Professional Medical Journal , 2010,
Abstract: Objective: To determine the frequency of common bile duct (CBD) injury in laparoscopic cholecystectomy in our settings, in mylast 500 cases, after going through the learning curve associated CBD injuries. Design: Descriptive study. Place and Duration of Study:Surgical Unit-I, Rawalpindi General Hospital and the author’s Surgical Clinics from January 2003 to December 2008. Patients and Methods:Five hundred patients undergoing laparoscopic cholecystectomy by the same surgeon were included. The important variables includeddemographic data, intra operative time and findings, frequency of CBD injury and post operative hospital stay. Results: There were 419(83.8%)females and 81(16.2%) males with mean age 45.04±11.03 years. 294(58.8% )patients had chronic cholecystitis with Cholelithiasis and were admitted through Out Patient Department whereas 206(41.2%) were admitted through Accident and Emergency Department with acutecholecystitis. Abdominal ultrasound showed multiple calculi in 351(70.2%) patients and 149(29.8%) patients had single calculus preoperatively. Empyema was found in 97(19.4%) cases whereas adhesions were present in 182( 36.4%) patients. In our study frequency of CBD injury was 1%. Mean operating time was 35 minutes. 96.8 % of the patients were discharged within 48 hrs of operation. Conclusion: Laparoscopic Cholecystectomy in our set up proved to be a safe procedure, having frequency of CBD injury of only 1% and a short hospital stay 493(96.8% )being discharged in less than 2 days.
Vibratory shear enhanced membrane process and its application in starch wastewater recycle
Kazi Sarwar Hasan,Chettiyappan Visvanathan,Prapan Ariyamethee,Sumaporn Chantaraaumporn
Songklanakarin Journal of Science and Technology , 2002,
Abstract: Membrane application in wastewater is gaining significant popularity. Selecting the right membrane and filtration technique is an important consideration to ensure a successful system development and long term performance. A new type of membrane filtration technology known as ‘Vibratory Shear Enhanced Process’ (VSEP) is introduced in this paper with some test results that has been conducted with VSEP pilot unit to recycle starch wastewater. Conventional cross flow membrane process used in wastewater application always led to rapid fouling. This loss in throughput capacity is primarily due to the formation of a layer that builds up naturally on the membranes surface during the filtration process. In addition to cutting down on the flux performance of the membrane, this boundary or gel layer acts as a secondary membrane reducing the native design selectivity of the membrane in use. This inability to handle the buildup of solids has also limited the use of membranes to low-solids feed streams. In a VSEP system, an additional shear wave produced by the membrane’s vibration cause solids and foulants to be lifted off the membrane surface and remixed with the bulk material flowing through the membrane stack. This high shear processing exposes the membrane pores for maximum throughput that is typically between 3 to10 times the throughput of conventional cross-flow systems. The short term results with raw starch wastewater shows very stable flux rate of 110 lmh using the VSEP system and selecting the PVDF ultrafiltration membrane with no pre-filtration.
Prediction of State of Wireless Network Using Markov and Hidden Markov Model
MD. Osman Gani,Hasan Sarwar,Chowdhury Mofizur Rahman
Journal of Networks , 2009, DOI: 10.4304/jnw.4.10.976-984
Abstract: Optimal resource allocation and higher quality of service is a much needed requirement in case of wireless networks. In order to improve the above factors, intelligent prediction of network behavior plays a very important role. Markov Model (MM) and Hidden Markov Model (HMM) are proven prediction techniques used in many fields. In this paper, we have used Markov and Hidden Markov prediction tools to predict the number of wireless devices that are connected to a specific Access Point (AP) at a specific instant of time. Prediction has been performed in two stages. In the first stage, we have found state sequence of wireless access points (AP) in a wireless network by observing the traffic load sequence in time. It is found that a particular choice of data may lead to 91% accuracy in predicting the real scenario. In the second stage, we have used Markov Model to find out the future state sequence of the previously found sequence from first stage. The prediction of next state of an AP performed by Markov Tool shows 88.71% accuracy. It is found that Markov Model can predict with an accuracy of 95.55% if initial transition matrix is calculated directly. We have also shown that O(1) Markov Model gives slightly better accuracy in prediction compared to O(2) MM for predicting far future.
Two-stage Cascaded Classifier for Purchase Prediction
Sheikh Muhammad Sarwar,Mahamudul Hasan,Dmitry I. Ignatov
Computer Science , 2015,
Abstract: In this paper we describe our machine learning solution for the RecSys Challenge, 2015. We have proposed a time efficient two-stage cascaded classifier for the prediction of buy sessions and purchased items within such sessions. Based on the model, several interesting features found, and formation of our own test bed, we have achieved a reasonable score. Usage of Random Forests helps us to cope with the effect of the multiplicity of good models depending on varying subsets of features in the purchased items prediction and, in its turn, boosting is used as a suitable technique to overcome severe class imbalance of the buy-session prediction.
DESIGNING ACCESS CONTROL MODEL AND ENFORCING SECURITY POLICIES USING PERMIS FOR A SMART ITEM E-HEALTH SCENARIO
HASAN MAHMUD,,S. M. DIDAR-AL-ALAM,MD. SARWAR MORSHED,MOHAMMAD OBAIDUL HAQUE
International Journal of Engineering Science and Technology , 2010,
Abstract: Sensor networks in medical applications are the edge component of the health care system. This type of network comprises a significant number of different sensor devices called smart items which are tightly connected and interacts continuously. Smart items measure the values of different health variables and send them through suitable communication interface. Measured data forms a crucial part of personal health information which must be protected from the aspect of integrity and patient privacy. This paper presents security concerns regarding an e-health application built on a wireless sensor network environment. We have designed security policies for the e-health scenario and enforced those policies through PERMIS (Privilege and Role Management Infrastructure Standards) that uses RBAC (Role Based Access Control), X.509 and PMI (Privilege ManagementInfrastructure) to implement authentication and authorization scheme. The concept of reference monitor has also been shown with an example policy implementation using ConSpec policy language.
EVALUATION OF NONLINEARITY EFFECTS ON PERFORMANCE OF DVB-H TRANSMISSION LINK
MD. SARWAR MORSHED,HASAN MAHMUD,S. M. DIDAR-AL-ALAM
International Journal of Engineering Science and Technology , 2010,
Abstract: Handheld devices of all kind have gained remarkable popularity in recent years. Choosing receiving end components for these handheld devices are critical. For example, if poorly suited and inexpensive amplifiers are chosen, then they tend to deteriorate signals. On the other hand, cheaper components are feasible for consumer product. This paper evaluates nonlinearity effects on transmission link serving Digital Video Broadcasting for Handhelds (DVB-H) based on the results of software simulator. The system is tested in various receiving scenarios with presence of noise and received signal power varying from sensitivity level up to saturated nonlinear region. Neighboring DVB-H channel and close-by GSM-uplink are considered as distortion sources. The simulation results also analyze the behavior of the system in the presence of interfering signals with variouspower levels.
Granulometric Analysis of Rajmahal Inter-Trappen Sedimentary Rocks (Early Cretaceous), Eastern India, Implications for Depositional History  [PDF]
Aparna Sinha, Sarwar Rais
International Journal of Geosciences (IJG) , 2019, DOI: 10.4236/ijg.2019.103015
Abstract: Rajmahal trap along with its Inter-trappean sedimentary rocks is found exposed in the eastern part of India (24°00'E - 25°15'N; 87°20'E - 87°15'E). Ten representative samples of Inter-trappean sandstone selected from the study area have been subjected to granulometric analysis. The result of the grain size analysis indicates that these sandstone specimens are very fine to fine grained with unimodal grain size distribution. They are dominantly fine skewed and generally mesokurtic in nature. The linear discriminant function plots of various grain size parameters suggest that these sandstones appear to have been deposited either in shallow marine or lacustrine environment. On multigroup multivariate discriminant functions V1 - V2 diagram majority of the samples fall in the beach depositional environment, indicating that most of the sediments were reworked by wave processes before deposition. The C-M pattern diagram shows that the sediment deposition took place in beach environment by rolling or suspension of sediments; hence the clastics were deposited in low energy condition.
Safety of Overnight Hospitalization after Transurethral Resection of Prostate  [PDF]
Sarwar N. Mahmood, Ismaeel Aghaways
Open Journal of Urology (OJU) , 2016, DOI: 10.4236/oju.2016.61001
Abstract: Background: Monopolar transurethral resection of prostate has long been a standard method of managements of benign prostatic hyperplasia. The safe and superior efficacy of transurethral resection of prostate (TURP) always argues strongly for maintaining it as the primary mode of therapy for patients with benign prostatic hyperplasia (BPH). There is a trend toward early catheter removal after transurethral resection of prostate (TURP) even to the extent of performing it as a day case. We explored the safety and feasibility of early catheter removal and discharging the patient without catheter after TURP. Materials and methods: Forty patients who underwent monopolar TURP were included in a prospective study. The decision to remove catheters on the first morning after surgery was based on the color of the catheter effluent, absence of clots, normal vital signs and adequate urine output. Patients who voided successfully were discharged on the same day as catheter removal. Results: Among the forty patients whose catheters were removed on first postoperative day, 38 patients (95%) voided successfully, and were discharged on the same day. However, two out of forty patients (5%) were recatheterized due to urethral discomfort during micturition. The catheter was removed on the next day. Mean overall duration of catheterization was 18.36 hours, and overall length of patient hospitalization was 21.68 hours. Conclusions: Overnight hospitalization and early catheter removal after transurethral prostatectomy are an appropriate, safe and effective way of patient care with minimal morbidity.
Internal and External Influences on the University Teachers in Semester System
Sadia Sarwar
International Journal of Emerging Sciences , 2011,
Abstract: There are so many influences a faculty member has to undergo at the higher education level in universities in semester system. We wanted to comb the universities for the internal and external influences on the university teachers and their consequences in Balochistan. It was done to determine the loss we bear due to the influences on the university teachers in Balochistan, and to generate such influence-free-mechanism in the universities of Balochistan to strengthen the educational milieu in the province. Faculty members play pivotal role in imparting the education at the higher education level in any country. They happen to be the nucleus of the education system. Disturbing and disrupting them in any was is, in effect, disturbing and disrupting the education process. Influencing them, directly or indirectly, halts the true teaching process. It creates many obstacles ranging from class boycotts, hunger strikes to processions and demonstrations either inside the institute or outside the institute. To forge such a composite mechanism not only to control these both internal and external factors in order to streamline the learning and imparting education process but also to afford a healthy and sound teaching environment.
Assessment of resistance to the attack of bean beetle Callosobruchus maculatus (Fabricius) in chickpea genotypes on the basis of various parameters during storage
Muhammad Sarwar
Songklanakarin Journal of Science and Technology , 2012,
Abstract: Chickpea (Cicer arietinum L.), is an important pulse food. During storage this commodity is severely attacked bybean beetle Callosobruchus maculatus (Fabricius) resulting losses in quantity and nutritional quality. Research studies onrelative resistance of 12 chickpea genotypes to the attack of C. maculatus during storage were carried out. The genotypesmost tolerant to bruchids comprised CH-52/02 and B-8/03, whereas, the most susceptible reactions were apparent inCH-86/02 and CC-117/00. The moderate pest incidence was observed in CH-28/02, CH-4/02, CH-32/02, CH-31/02, CH-9/02,CM-772/03, B-8/02 and CM-628/03 genotypes. The tolerant genotypes exhibited hard and wrinkled seed coat, dark browncolour and small size grain. These characteristics demonstrated a significant harmful effect to pest appearance and graindamage. The vulnerable genotypes had soft and smooth seed coat, white seed colour and bigger grain size that causedvulnerability to C. maculatus. Based on the present investigation, chickpea genotypes CH-52/02 and B-8/03 deserve specialconsideration and may be recommended for relatively longer storage to achieve the goal of long term and sustainable pestmanagement strategies.
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