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Search Results: 1 - 10 of 1009 matches for " Zaheer Ullah "
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catena-Poly[[[pentaaquacerium(III)]-μ-pyridine-2,4,6-tricarboxylato-κ4N,O2,O6:O6′] tetrahydrate]
Shahzad Sharif,Islam Ullah Khan,Samia Zaheer,Seik Weng Ng
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812015887
Abstract: The CeIII atom in the title compound, {[Ce(C8H2NO6)(H2O)5]·4H2O}n, is N,O,O′-chelated by the carboxylate trianion and is coordinated by five water molecules; a carboxyl O atom from an adjacent trianion bridges the CeIII atom, resulting in a chain running along the a axis. The nine atoms surrounding the metal atom comprise a tricapped trigonal-prismatic polyhedron. The coordinated and lattice water molecules interact with each other and with the carboxyl O atoms by O—H...O hydrogen bonds, generating a three-dimensional network.
An Efficient Network Monitoring and Management System
Rafiullah Khan,Sarmad Ullah Khan,Rifaqat Zaheer,Muhammad Inayatullah Babar
International Journal of Information and Electronics Engineering , 2013, DOI: 10.7763/ijiee.2013.v3.280
Abstract: Large organizations always require fast and efficient network monitoring system which reports to the network administrator as soon as a network problem arises. This paper presents an effective and automatic network monitoring system that continuously monitor all the network switches and inform the administrator by email or sms when any of the network switch goes down. This system also point out problem location in the network topology and its effect on the rest of the network. Such network monitoring system uses smart interaction of Request Tracker (RT) and Nagios softwares in linux environment. The network topology is built in Nagios which continuously monitor all of the network nodes based on the services defined for them. Nagios generates a notification as soon as a network node goes down and sends it to the RT software. This notification will generate a ticket in RT database with problematic node information and its effect on the rest of the network. The RT software is configured to send the ticket by email and sms to the network administrator as soon as it is created. If the administrator is busy at the moment and does not resolve the ticket within an hour, the same ticket is automatically sent to the second network responsible person depending upon the priority defined. Thus, all persons in the priority list are informed one by one until the ticket is resolved.
Neuroblastoma in Saudi Children: A Single Center Experience (2006-2014)  [PDF]
Zaid Al Naqib, Atif A. Ahmed, Musa Al Harbi, Fahad Al Manjomi, Zaheer Ullah Khan, Awatif Alanazi, Othman Mosleh, Walid Ballourah, Mohammed Rayis
Journal of Cancer Therapy (JCT) , 2015, DOI: 10.4236/jct.2015.610098
Abstract: Introduction: Neuroblastoma is the most common extracranial solid tumor in childhood and survival rate has improved during the last few decades. Only a few studies, related to Neuroblastoma in Saudi Arabian children, have been performed. We report epidemiologic data and our clinical experience from the department of Pediatric Hematology Oncology (PHO), King Fahad Medical City (KFMC), Riyadh, Saudi Arabia. Method: A retrospective observational study of all patients, with diagnosis of Neuroblastoma, who attended PHO-KFMC from July 2006 to June 2014 was performed. The survival periods (overall survival and disease-free survival) and the final outcomes for patients treated and followed at KFMC were recorded. The survival data were statistically correlated with the clinical, pathological and biological features of patients and tumors and compared to national and international cohorts. Results: Eight-year data were available for the 42 patients of which 22 (52.4%) were male and 20 (47.6%) were females. Age at diagnosis ranged 0 - 91 months with a mean and median of 26.3 and 18.5 months respectively. 16 (38.1%) patients were under one year and 26 (61.9%) above 1 year of age. The event-free survival (EFS) and overall survival (OS) rates were 66.5% and 71.5% respectively. EFS and OS among those who were <1 year age at presentation was 75% and 82%, whereas ≥1 yr age group had 59% and 62% survival rates respectively. Patients with tumors in the adrenal had considerably lower EFS (59%) and OS (63%); in comparison to patients with tumors sites other than the adrenal who had EFS and OS of 85% and 89% respectively. Both EFS and OS survival rates at the end of follow-up interval were 100.0%, in the low and intermediate risk groups. In contrast, patients in the high risk group had EFS and OS rates of 44% and 48% respectively. This difference was statistically significant (p < 0.05). Conclusion: Our results are very encouraging and comparable with known published international cohorts, and reveal an excellent outcome for stage 1, 2, 3 & 4 s. The prognosis for advanced (stage 4) disease remains rather poor. A collaborative Saudi-wide effort, with an emphasis on research in detecting clinical and biologic characteristics of aggressive disease and tailoring therapy, is needed.
An Updated Review on Chicken Eggs: Production, Consumption, Management Aspects and Nutritional Benefits to Human Health  [PDF]
Khalid Zaheer
Food and Nutrition Sciences (FNS) , 2015, DOI: 10.4236/fns.2015.613127
Abstract: Ancestors of the modern chicken were domesticated from members of the Gallus genus probably 7 to 8 thousand years ago in southeastern Asia. Subsequently, they spread globally for meat and egg production. In the chicken egg, there is a balance of numerous, high-quality nutrients, many of which are highly bioavailable. The egg confers a multitude of health benefits to consumers emphasizing its classification as a functional food. Current global per capita egg consumption estimates approach 9 kg annually but vary greatly on a regional basis. This review deals with global production, consumption, and management aspects such as hygiene, feeding, and housing. Management aspects play key roles in the composition, quality, food safety, and visual (consumer) appeal of the egg. Also the manipulation of egg nutrients and value for human health is discussed.
3-Ammonio-4-hydroxybenzoate monohydrate
Sami Ullah,M. Nawaz Tahir,Durre Shahwar,Zaheer-ud-Din Khan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809017462
Abstract: The title compound, C7H7NO3·H2O, which crystallized as a hydrate, was obtained from an extraction of the plant species Saussurea atkinsonii of the asteraceae family collected from the hilly area (Ayubia) of Pakistan during the flowering season. The dihedral angle between the benzene ring and the carboxylate group is 25.64 (5)°. In the crystal, the packing is consolidated by N—H...O and O—H...O hydrogen bonds, as well as weak aromatic π–π stacking [centroid–centroid separation = 3.9365 (9) ] and C=O...π interactions.
Pediatric Non-Hodgkin Lymphoma: A Retrospective 7-Year Experience in Children & Adolescents with Non-Hodgkin Lymphoma Treated in King Fahad Medical City (KFMC)  [PDF]
Nahla Ali Mobark, Suha A. Tashkandi, Wafa Al Shakweer, Khalid Al Saidi, Suha A. Fataftah, Mohammed M. Al Nemer, Awatif Alanazi, Mohammed Rayis, Walid Ballourah, Othman Mosleh, Zaheer Ullah, Fahad El Manjomi, Musa Al Harbi
Journal of Cancer Therapy (JCT) , 2015, DOI: 10.4236/jct.2015.64033
Abstract:

Background: Non-Hodgkin’s lymphoma is an aggressive malignant disease in children and adolescents. Although it is the fourth most common malignancy in Saudi children as reported in Saudi cancer registry, less information is available about pediatric Non-Hodgkin lymphoma and its outcome in Saudi Arabia. Study Objectives: To provide demographic data, disease characteristics, treatment protocol, toxicity and outcome of treatment in children & adolescents with Non-Hodgkin’s lymphoma treated at KFMC. This study will form base line for future studies about pediatric Non-Hodgkin’s lymphoma in KFMC, which may help to improve outcome for children with cancer in Saudi Arabia. Study Patients and Method: We retrospectively analyzed 28 children and adolescents diagnosed to have Non-Hodgkin’s lymphoma at KFMC between December 2006 and December 2013, followed-up through June 2014. Results: Of the 28 patients, 10 (35.7%) girls and 18 (64.3%) boys, the male-to-female ratio was 1.8; 1. The median age at time of diagnosis was 6.4 years old (range 2.0 to 13.0 years old). The majority of patients (64.3%) were aged between 5 and 12 years old. Burkitt’s lymphoma BL/BLL was the most common pathological subtype (60.7%), and DLBCL was the second most common subtype (21.4%). Abdominal and Retroperitoneal involvement was the most common primary site (78.6%) including the ileocaecal region. Most of the children presented with advanced Stage III and IV (75%), Cytogenetic study which screens specifically for the t (8; 14) (q24; q32) a characteristic genetic feature of Burkitt’s Lymphoma was obtained from 21 patients, variant rearrangement was observed in 3/21 samples and complex chromosomes karyotype in addition to IGH/MYC rearrangement was observed in 2/21 samples. Those patients presented with very aggressive lymphoma and combined BM and CNS involvement. We use the French-American-British Mature B-Cell Lymphoma 96 Protocol (FAB LMB 96) for treatment fornewly diagnosed Mature B-Cell type NHL and high risk ALL CCG 1961 Protocol for lymphoblastic lymphoma and international Anaplastic Large Cell Lymphoma 99 Study Protocol for ALCL. The median follow-up in patients not experiencing an adverse event was 53.1 months. The estimated 3-year EFE and OS rates in the entire cohort of patients with newly diagnosed NHL treated in the KFMC were 85.2% and 89.2% respectively; Overall survival (OS) rate of patients with mature

Anomalous left coronary artery from pulmonary artery: Case series and brief review  [PDF]
Muhammad Dilawar, Zaheer Ahmad
Open Journal of Pediatrics (OJPed) , 2012, DOI: 10.4236/ojped.2012.21013
Abstract: Anomalous origin of left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital coronary anomaly. In this study, we present all the ALCAPA patients which were admitted at our institution during April 2007-December 2010. Retrospective review of these patients regarding their clinical presentation and the use of diagnostic modalities will be presented in this series. There were total of five patients, three male and 2 female, with age range of 2 - 12 months. The most common symptoms at presentation were tachypnea (4/5) and poor feeding with irritability (3/5). Electrocardiogram was abnormal in 2/5 cases and chest X ray revealed cardiome-galy with pulmonary congestion in 4/5 patients. Echocardiogram showed mitral valve regurgitation in 5/5 cases (3 with moderate and 2 with mild to moderate), Left ventricular dilatation/dysfunction in 4/5 patients, echogenic left ventricular papillary muscles in 4/5 patients and prominent right coronary with strong suspecision of ALCAPA in 4/5 patients. Coronary angiography was performed in 4/5 cases to confirm the diagnosis. We conclude that by thorough clinical assessment along with ECG and CXR, the diagnosis of ALCAPA can be strongly suspected. Echocardiogram can almost always make the diagnosis of ALCAPA and coronary angiography can confirm the diagnosis in rare atypical cases.
Safety and efficacy of amplatzer duct occluder for percutaneous closure of ventricular septal defects with tunnel shape aneurysm: Medium term follow up  [PDF]
Muhammad Dilawar, Zaheer Ahmad
World Journal of Cardiovascular Diseases (WJCD) , 2013, DOI: 10.4236/wjcd.2013.32035
Abstract:

Objectives: Different devices including Amplatzer duct occluder has been used for percutaneous closure of ventricular septal defects. This study reports our medium term follow up of perimembranous and muscular ventricular septal defects with tunnel shape aneurysm closure using the Amplatzer duct occluder. Materials and Methods: From May 2006-December 2012, we used Amplatzer duct occluder in seven ventricular septal defect patients here atHamad General Hospital,Doha,Qatar. There were 4 male and 3 female patients with an age range of 4 - 32 years with a median of 8 years and weight range of 16 - 63 kgwith a median of33 kg. In this group, 6 were perimembranous and 1 muscular and all these ventricular septal defects had a tunnel shape aneurysm. Transesophageal echocardiographic diameter ranged from 4 - 8 mmand Qp/Qs was 1 - 1.6. Angiographically, the diameter on the left ventricular side measured 3.5 - 10 mmand on right ventricular side 2.4 - 5 mm. 8/6 mmAmplatzer duct occluder was used to close these ventricular septal defects. Results: There were no major complications and immediately after the procedure there was no residual shunt in any of these patients and all the patients remained in normal sinus rhythm. One patient was expatriate and no further follow up was available. The rest of the 6 patients had 1 - 80 months with a median of 54 months follow up and none of these patients had any residual shunt and all remained in normal sinus rhythm. Two patients developed trivial aortic valve regurgitation immediate post procedure, one remained unchanged and the 2nd has progressed to mild at this latest follow up. Conclusion: Amplatzer duct occluder is feasible and a safe device for percutaneous closure of selective tunnel shape aneurysmal perimembranous and muscular ventricular septal defects.

Speed Limit and Fatalities in the U.S.: Implication for Transportation Policy  [PDF]
Kashif Zaheer Malik, Ammar Aftab
Theoretical Economics Letters (TEL) , 2017, DOI: 10.4236/tel.2017.75094
Abstract:
The paper attempts to investigate into the prevalent notion that higher speed limits lead to increase in fatalities using Vector Auto Regressive (VAR) model for bivariate time series. The paper used Fatality Analysis Reporting System (FARS) time series data set from 1975 to 2010. The paper is the first one to make use of Vector Autoregressive Model (VAR) on this time series dataset to study the potential dual causality between speed and fatalities. The results of the paper partially support the causation between speed limit and fatalities, thus, complementing the results of the existing literature relating speed limits and fatalities such as “Influence of speed limits on roadway safety in Indiana” [1], “Driver Speed Behavior on US Streets” [2], and “Speed Limit Laws in America: Economics, Politics and Geography” [3]. However, instead of determining causation through various regression models, the paper establishes the causality by inducing a speed shock and analyses its impact upon fatalities. The paper concludes that in states with higher per capita automobiles and limited public transportation facilities such as Georgia, a sudden increase in speed limit has an immediate and higher impact upon accident related deaths, whereas, in states with lower per capita automobiles and higher public transportation services such as New York, the sudden increase of speed limit has minimal impact on accident related fatalities.
A generalization of Lucas' theorem to vector spaces
Neyamat Zaheer
International Journal of Mathematics and Mathematical Sciences , 1993, DOI: 10.1155/s0161171293000316
Abstract: The classical Lucas' theorem on critical points of complex-valued polynomials has been generalized (cf. [1]) to vector-valued polynomials defined on K-inner product spaces. In the present paper, we obtain a generalization of Lucas' theorem to vector-valued abstract polynomials defined on vector spaces, in general, which includes the above result of the author [1] in K-inner product spaces. Our main theorem also deduces a well-known result due to Marden on linear combinations of polynomial and its derivative. At the end, we discuss some examples in support of certain claims.
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