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Search Results: 1 - 10 of 940 matches for " Shahid Maqsood "
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Comparative Modal Analysis of Gasketed and Nongasketed Bolted Flanged Pipe Joints: FEA Approach
Muhammad Abid,Shahid Maqsood,Hafiz Abdul Wajid
Advances in Mechanical Engineering , 2012, DOI: 10.1155/2012/413583
Comparative Modal Analysis of Gasketed and Nongasketed Bolted Flanged Pipe Joints: FEA Approach
Muhammad Abid,Shahid Maqsood,Hafiz Abdul Wajid
Advances in Mechanical Engineering , 2012, DOI: 10.1155/2012/413583
Abstract: It is widely known that resonance can quickly lead to failure in vibrating bolted flanged pipe joints. Condition monitoring is performed time to time in some industries for smooth operation of a system, whereas mostly trial-and-error tests are performed to control vibration. During all this process, the inherent design problems are not considered. A bolted flange joint in piping system is not a simple problem, being the combination of flange, gasket, bolts, and washers. The success of a bolted flanged pipe joint is defined by the “static mode of load” in the joint. However, it has been recognized that a “dynamic mode of load” governs in a gasketed bolted flanged pipe joint, which leads to its failure due to flange rotation, providing flange yielding, fatigue of bolts, and gasket crushing. This paper presents results of detailed 3D finite element and mathematical modal analysis under bolt up to determine natural frequencies and mode shapes of gasketed flanged joints with and without raised face in comparison to the nongasketed flange joint. 1. Introduction Since the advent of bolted flanged pipe joints and their applications in industries, leakage is the major causes of their failure. The problem becomes worst under dynamic loading applications such as in mill digester pipes during transfer of pulp. Traditional gasketed flanged joints are claimed to be problematic even during bolt up due to “dynamic mode of load” [1–6]. This is concluded due to the flange rotation, flexibility of gasket hence bolt loosening and leakage [1, 2, 4]. For large diameter flanges, with bolts diameter more than 18?mm, use of hammering for bolt tightening provides worst effect resulting in gasket crushing and flange yielding [1, 2, 4]. This not only increases maintenance, but also damages the joint permanently. This shows that inherent flange design problem is not considered. To avoid and control flange rotation, raised face of the flange in many industrial applications is machined [1, 2]. Keeping in view the above mentioned problems, associated with the conventional gasketed joints used in industry, several alternatives to these require consideration. For this, a nongasketed joint, concluded as an alternative for its “static mode of load,” during experimental and analytical studies by [1–4], is analyzed using detailed comparative 3D finite element modal analysis in comparison to the conventional gasketed joints with and without raised face to observe behaviour of both the joints in detail under applied bolt-up conditions. Natural frequencies and mode shapes for both the joints
Effect of Different Phosphorus Levels on Growth and Yield Performance of Lentil (Lens culinaris Medic)
Muhammad Maqsood,Muhammad Shahid Ibni Zamir,Riazat Ali,Aftab Wajid
Pakistan Journal of Biological Sciences , 2000,
Abstract: The investigation was conducted to determine the effect of different levels of phosphorus fertilizer on growth and yield performance of Lentil (Lens culinaris medic) CV. Masoor-85. Flowering and maturity of the crop was significantly affected by different rates of phosphorus. Maximum 1000-grain weight (19.38 g) was recorded with the application of 75 kg P2O5 ha-1. Application of 75 kg P2O5 resulted in higher yield of 1250 kg ha-1 .
A Case Study of Hospital Waste Management in Balochistan and Its Impact on Health and Environment
Rabeea Zafar,Syed Shahid Ali,Zaheer Uddin,Maqsood A. Khan
Research Journal of Environmental and Earth Sciences , 2013,
Abstract: Hospital waste is a mixture of general refuse, biomedical laboratory and pathological wastes. Between 75-90% of the waste produced by the health care providers is non-risk health care waste whereas, the remaining 10-25% consist of infectious pathological waste and is of great health concern, if not segregated from general hospital waste. Various studies have reported the waste generation in urban centers of Pakistan, however, no data has been reported previously for Balochistan. Current study surveyed public sector hospitals in Balochistan (Quetta City) and hospital waste was segregated based on their specification and categorized into: general, bio-medical and hazardous wastes. The amount of waste produced in Surgical departments/Operation Theatres was approximately: general (1.75 kg/bed/day), medical (0.30 kg/bed day) and hazardous (0.013 kg/bed/day). Similarly, the average daily waste produced for General/Non-surgical Wards was: general (0.350 kg/bed/day), medical (0.050 kg/bed/day) and hazardous (0.002 kg/bed/day). Amount of biomedical waste from all hospitals consisted of needles (0.45 kg/bed/day), gloves (0.480 kg/bed/day), drain tubes (0.30 kg/bed/day), cottons and gauze (0.40kg/bed/day), napkins (0.02 kg/bed/day), plastic syringes (0.30 kg/bed/day), swap (0.005 kg/bed/day) and body parts (0.40 kg/bed/day). As a whole, 8-10% of total waste was hazardous, 10% was biomedical of the total waste. Although the data is comparable with other cities of Pakistan, more studies are warranted to enumerate other private medical facilities in order to find their generation and means of disposal
Comparative Growth, Yield and Juice Quality of Different Sugarcane Cultivars
M. Maqsood,Manzoor Hussain,M.T. Mahmood,Shahid Ibni Zamir
Pakistan Journal of Biological Sciences , 2000,
Abstract: Not Available
Computational Complexities and Breaches in Authentication Frameworks of Broadband Wireless Access
Raheel Maqsood Hashmi,Arooj Mubashara Siddiqui,Memoona Jabeen,Khurram S. Alimgeer,Shahid A. Khan
Computer Science , 2009,
Abstract: Secure access of communication networks has become an increasingly important area of consideration for the communication service providers of present day. Broadband Wireless Access (BWA) networks are proving to be an efficient and cost effective solution for the provisioning of high rate wireless traffic links in static and mobile domains. The secure access of these networks is necessary to ensure their superior operation and revenue efficacy. Although authentication process is a key to secure access in BWA networks, the breaches present in them limit the networks performance. In this paper, the vulnerabilities in the authentication frameworks of BWA networks have been unveiled. Moreover, this paper also describes the limitations of these protocols and of the solutions proposed to them due to the involved computational complexities and overheads. The possible attacks on privacy and performance of BWA networks have been discussed and explained in detail.
Solution of Some Integral Equations Involving Confluent k-Hypergeometric Functions  [PDF]
Shahid Mubeen
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.47A003
Abstract: The principle aim of this research article is to investigate the properties of k-fractional integration introduced and defined by Mubeen and Habibullah [1],and secondly to solve the integral equation of the form\"\"
, for k > 0, β > 0, y > 0, 0 < x < t < ∞,  where \"\" is the confluent k-hypergeometric functions, by using k-fractional integration.
The Professional Medical Journal , 2007,
Abstract: Objectives: To find out the efficacy and safety of Levofloxacinin patients suffering from typhoid fever. Design: Non-comparative and prospective study. Setting: Medical Units ofAllied & DHQ Hospital (PMC) Faisalabad. Period: From May 2002 to July 2004. Material & Methods: All suspectedfebrile patients were examined and provisionally diagnosed to have typhoid fever were admitted for the purpose ofstudy till they were satisfactorily discharged. Results: This clinical study was conducted on 70 patients of Enteric Fever.Fifty-two patients were male and 18 were female. The mean age for male patients in the study sample was 37.58± 8.13while the mean age of females was 21.92± 4.73 years. Fever as a symptom was present in all 70(100%) of thepatients. Anorexia was there in 61(85.5%)patients and abdominal pain in 49(70%) patients. Twenty-seven (38.5%)patients had constipation along with other features. Diarrhea was present in 6 (8.5%) patients. Relative bradycardiawas present in 20(28.5%) patients. Hepatomegaly was there in 31(44.3%) and Splenomegaly in 24(34.3%). Elevatedliver enzymes were found in 29 (41.4%) of the patients and blood cultures positive for Salmonella typhi was seen in19(27.1%) patients. Widal test was positive at dilution of 1:160 in almost all of the cases and at 1:320 dilution in 18%of cases in current study. The success rate of Levofloxacin in our study was 100% in the form of settlement of feverand other symptoms and signs. The side effects were seen in 17(24.2%) patients. Conclusions: In conclusionlevofloxacin is effective in treatment of typhoid fever and its use in this indication is safe.
The Professional Medical Journal , 2007,
Abstract: A comparative trial was conducted to study the relative efficacy ofendoscopic injection sclerotherapy versus endoscopic injection sclerotherapy plus octreotide with reference to acutecontrol of bleeding esophageal varices and early re-bleeding. A total of 58 patients equally divided in two groups wereincluded in this study. Bleeding was controlled in 90% patients in both the groups. In group1 there were 20(68.96%)males and18(62%) males in group 2. The mean age of the patients under study was 50.62 &50.55 in group 1& 2respectively. The major proportion of patients was in Child Class B, which comprised of 42(72.41%) in total. ChildClass C was excluded out of study. Twenty-two (75.86%) patients in group 1 were in Child Class B and 7(24%) werein Child Class A & in group 2 there were 20 (68.96%) patients in Child Class B and 21% were in Class A. Etiology ofcirrhosis was HCV in 41(70.86%) and HBV in 9(15.5%) and other etiologies in remaining patients. In, group 1,HCVrelated cirrhosis was seen in 20 (68.96%) and in group 2, this was responsible for cirrhosis in 21(70.68%) of patients.Patients suffering from HBV related cirrhosis were 5(17.42%) in first group and 4(13.79%) in second group 2. Relativelyless number of patients in group 2, had rebleeding in first week of their in-hospital follow-up i.e. 5 versus 8 patients.Average number of blood transfusions per patient was 3.86 piants in group 1and 2.45 piants in group 2. The meanduration of Hospital stay was 8.52 days in group 1 and 7.45 days in group 2. Procedure related complications and inhospital outcome was almost comparable in two groups. The most common complication was hepatic encephalopathy.Combining endoscopic therapy with one of the vasoactive agents reduces the chances of early re-bleeding and needfor number of blood transfusions and duration of hospital stay.
The Professional Medical Journal , 2008,
Abstract: Objective: To explore the pattern and prevalence of inpatient psychiatricmorbidity and to see how it differs from the pattern of psychiatric morbidity in community. Design: The details of all inpatientsfrom the case register developed for a health information system was included in study Setting: In Departmentof Psychiatry and Behavioral Sciences, Bahawal Victoria Hospital, Bahawalpur. Period: From 1998-2003. Results: Atotal of 5426 patients were admitted in the six year. There was a slight difference of 0.8% in total number of males andfemales cases (i.e., 2764 males Vs 2662 females). Overall difference reported in the present study, in mean ages ofmales and females was 3.45 years (i.e., males = 31.85 Vs females = 28.40). Mean stay of patients in ward is 10-12days. Most patients were admitted with Conversion disorder 24% followed by Schizophrenia 23%, Depressive disorder20%, Drug Dependence 10%, Bipolar Disorder 7%. The patients with Neurotic Disorder and Organic Disorder werebelow 5%. Conclusion: The study showed that overall general pattern of inpatient psychiatric morbidity is in line withpattern of psychiatric morbidity in community and the partial variance can be explained in terms of social variables, asthis variance exist even across studies within community samples.
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