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Search Results: 1 - 10 of 7553 matches for " Khan "
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Supported TritonX-100 Polyaniline Nano-Porous Electrically Active Film onto Indium-Tin-Oxide Probe for Sensors Application  [PDF]
Raju Khan
Advances in Chemical Engineering and Science (ACES) , 2011, DOI: 10.4236/aces.2011.13021
Abstract: Supported tritonX100 polyaniline nano-porous electrically active film has been fabricated successfully onto indium-tin-oxide conducting probe using electrochemical polymerization process. The doping of TX-100 in the polymeric network of PANI was suggested using cyclic voltammeter, UV-vis spectroscopy, and Fourier Transform Infrared spectroscopy. The change in the surface morphology of PANI thin film due to incorporation of tritonX-100 was investigated using Atomic Forced Microscopy and porosity has been confirmed scanning electron microscopy, respectively. The surface morphology, uniformly disperse hexagonal close packing of TX-100 in PANI matrices due to the incorporation of TX-100 in polymeric network of PANI was confirmed by Atomic Force Microscopy. The electrical conductivity of PANI-TX-100 increases from 1.06 x 10-2 S/cm-1 to 4.95 x 10-2 S/cm-1 as the amount of TX-100 increases during the polymerization. The change in the morphology and electrical conductivity of PANI due to incorporation of TX-100 prove as a promising material for the sensing application.
A Novel, Safe Way of Removing Non-Deflatable Bladder Catheter  [PDF]
Ziauddin Khan, Umair Tahir Khan, Imran Khan, Tahir Naeem Khan
Open Journal of Urology (OJU) , 2012, DOI: 10.4236/oju.2012.24044
Abstract: Non-deflated balloon of a transurethral inserted bladder catheter is a problem that could be difficult to manage, especially in males. A variety of methods have been described to puncture the balloon and remove the catheter, though these can be associated with complications. We illustrate a simple and a safe method to overcome this problem using a flexible cystoscope under local anaesthesia.
Book Review on Pakistan and the New Nuclear Taboo: Regional Deterrence and the International Arms Control Regime  [PDF]
Zafar Khan
Advances in Historical Studies (AHS) , 2013, DOI: 10.4236/ahs.2013.21001
Abstract: Pakistan has always been the focus of international community, strategists, analysts, and academic scholars on various issues more especially on the nuclear issue since Pakistan has embarked its journey from covert to overt nuclearisation of South Asia. Any work in relation to Pakistan’s nuclear weapons program ranging from its nuclear policy to its nuclear security has gained a great significance in the realm of politics and international studies. Rizwana Abbasi’s maiden volume entitled, Pakistan and the New Nuclear Taboo: Regional Deterrence and the International Arms Control Regime is a welcome contribution that would certainly be embraced by the Pakistani security planners and strategic community in general and the wider international audience in particular. The key aim of this book is that norms, values, and regime still matter despite the presence and influence of hard core realism and neo-realism.
Comparison between the Personality Dimensions of Delinquents and Non-Delinquents of Khyber Pukhtunkhwa (KPK), Pakistan  [PDF]
Sehrish Khan
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.25027
Abstract: This study was an attempt to find out the comparison between the personality dimensions of delinquents and non delinquents of Khyber Pukhtonkhwa (KPK). Eysenck personality Questionnaire (junior) (Urdu Version 2007) was administered on the sample of 400 (Delinquents = 200, non-delinquents = 200). Delinquents were the inmates in different jails of KPK while non-delinquents
were the students of different colleges of KPK. It was hypothesized that the delinquents will score higher on all the four dimensions of Eysenck personality scale as compared to non delinquents. Findings of the study confirmed the said hypothesis. It was proved that delinquents have higher scores of psychoticism, neuroticism, extraversion, and lie as compared to non-delinquents. The findings of this study can help the parents, teachers, and the law departments to focus on the construction of healthy personality so that the rate of crimes among adolescents can be minimized.
Head Teachers’ Beliefs and Practices about Teaching and Learning in Pakistani Public Schools  [PDF]
Asif Khan
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.622237
Abstract: Very limited research focusing on instructional contribution of Pakistani public school administrators has emerged from the educational landscape of Pakistan. Therefore, the present study highlights some of the core issues related to the instructional contribution of two head teachers situated in public schools. While focusing on instruction-related practices, the two case studies particularly examine the head teachers’ engagements in supervisory processes and in-school capacity development initiatives. The study notes that despite the presence of required human and physical resources, the two head teachers make limited contributions towards the instructional quality of their respective schools. A vague understanding about their roles, a limited capacity building opportunities, and an absence of an accountability mechanism prevent the two head teachers from becoming more involved in the said processes. The study maintains that a new organizational culture needs to be introduced that re-conceptualizes the role of Pakistani head teachers while emphasizing the above-mentioned factors.
Analysis of Social, Psychological and Other Factors on College Dropout Rates among African American Students  [PDF]
Salam Khan
Advances in Applied Sociology (AASoci) , 2017, DOI: 10.4236/aasoci.2017.78020
Abstract: This study explored the African American college students’ retention behavior and identifies the effect of different social, psychological and other factors. Randomly selected students from predominant African American university completed the perceived stress scale, self-motivation scale, parental involvement, childhood economic situation, mentorship and drug and alcohol use questionnaire. Non-parametric analyses suggested that higher stress level, childhood poverty, lack of parental involvement or support, without a mentor support and lack of self-motivation increase the likelihood of dropping out from college. This study’s findings have important implications for college retention among African American students.
On Some I-Convergent Double Sequence Spaces Defined by a Modulus Function  [PDF]
Vakeel. A. Khan, Nazneen Khan
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.55A006
Abstract: In 2000, Kostyrko, Salat, and Wilczynski introduced and studied the concept of I-convergence of sequences in metric spaces where I is an ideal. The concept of I-convergence has a wide application in the field of Number Theory, trigonometric series, summability theory, probability theory, optimization and approximation theory. In this article we introduce the double sequence spaces \"\" and \"\",for a modulus function f and study some of the properties of these spaces.

Obstacles in Learning English as a Second Language among Intermediate Students of Districts Mianwali and Bhakkar, Pakistan  [PDF]
Tahir Jahan Khan, Nasrullah Khan
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.42021
Abstract: No one can dispute the assertive position of English as a communicative language. It is enjoying status of medium of instruction as well as compulsory subject in Pakistan. But it is facing numerous problems in learning. The failure rate of the students is increasing which is deplorable. The failure in this subject means the failure in the public examinations. The concerns about the situation can be observed by all the stakeholders. The recent study is an attempt to probe into the alarming situation that has been conducted in the male colleges of public sector of Districts Mi-anwali and Bhakkar, the remotest Districts of Pakistan. This study deeply looks into the obstacles faced by the intermediate collegiate students in learning it. Four out of seven public sector colleges of both districts have been selected; taking from urban and rural areas to get genuine and reasonable data in this connection. The study has examined the position of English in the presence of Urdu and Saraiki, the mother tongues of students with the background of the brief survey of the position of English and the learners of it. Many factors have been indicated that are responsible for creating obstacles in learning English. Results point out that students of the context desire to learn English but numerous factors stand on their way of progress that need to be eradicated for the better future of this language. The ambiguous educational policies, the bias attitude towards English, the behavior of parents and teachers, the adverse policies of the government, the unavailability of modern teaching technology to the public sector, the shortage of English teachers especially in the remotest located colleges, the flawed syllabi and examination system, the lack of teaching training and the deprived position of teachers are the major factors that are arising obstacles in learning English. The study emphasizes upon the state support by adopting positive approach to the issue to strengthen the position of English.
Can Simple Preoperative Hemoglobin Testing Screen Symptomatic Anemia in Patients Undergoing Ambulatory Surgeries in Third World Countries?  [PDF]
Sobia Khan, Mueen Ullah Khan, Khalid Samad
Open Journal of Anesthesiology (OJAnes) , 2012, DOI: 10.4236/ojanes.2012.24034
Abstract: Background: Patients coming for ambulatory surgeries are mostly healthy adults and asymptomatic anemia in these patients is rare. According to international standards, perioperative period is not an appropriate setting to screen and investigate the cause of asymptomatic anemia, but in third world countries where iron deficiency is rampant, it is generally required as per local hospitals policy to test hemoglobin levels prior to any surgery in order to prevent morbidity. The purpose of our study is to look at the prevalence of anemia in patient undergoing minor elective ambulatory surgeries. Method: This was a cross sectional observational study conducted at tertiary care unit, Karachi, Pakistan. A total of 385 ASA-I (American Society of Anesthesiologist) and II patient’s age ranged 18 - 60 years, scheduled for day care surgical procedures were enrolled in the study. Results: Anemia was detected in 74 (19.2%) patients and its prevalence was found to be higher in females and in patients above 50 years of age. However, the presence of anemia did not have any influence on the perioperative outcomes or management. Conclusion: The routine preoperative hemoglobin testing does not have any effect on the perioperative outcomes in asymptomatic patients who are planned for elective day care surgeries.
Instability of Thermally Conducting Self-Gravitating Systems  [PDF]
Shaista Shaikh, Aiyub Khan
Journal of Modern Physics (JMP) , 2010, DOI: 10.4236/jmp.2010.110010
Abstract: The gravitational instability of a thermally conducting self-gravitating system permeated by a uniform and oblique magnetic field has been analyzed in the framework of Tsallis’ nonextensive theory for possible mod-ifications in the Jeans’ instability criterion. It is concluded that the instability criterion is indeed modified into one that depends explicitly on the nonextensive parameter. The influence of thermal conductivity on the system stability is also examined.
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