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Search Results: 1 - 10 of 7825 matches for " Sher Khan "
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Studies on Photocatalytic Degradation of Acridine Orange and Chloroform Sensing Using As-Grown Antimony oxide Microstructures  [PDF]
Aslam Jamal, Mohammed M Rahman, M. Faisal, Sher Bahadar Khan
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.26093
Abstract: Flower shaped antimony oxide (Sb2O3) microstructures were synthesized in a large quantity via simple solution method using aqueous mixtures of antimony chloride and hexamethylene diamine (HMDA). The morphological characterizations were done by field emission scanning electron microscopy (FESEM), which revealed that the synthesized products possess flower-shaped microstructures. The detailed structural characterizations performed by X-ray diffraction (XRD), Fourier transform infrared spectrophotometer (FT-IR) and Raman spectrophotometer confirmed that the synthesized microstructures are well-crystalline antimony oxide. The Energy dispersive spectroscopy (EDS) shows that the grown products are composed of Sb and O. Optical properties of the synthesized products were characterized by UV-Visible spectrophotometer which exhibits a well defined peak at ~ 291.0 nm. The photo-catalytic activity of the Sb2O3 microstructures was evaluated by degradation of acridine orange (AO), which mineralized almost 63.0% in 150 min. The chemical sensing properties of Sb2O3 microstructures was also studied by I-V technique using chloroform as a detecting solvent. The fabricated chloroform sensor demonstrates good sensitivity of 0.1154 µA cm–2 mM–1, lower-detection limit (~0.1 mM), large-linear dynamic range (LDR, 0.122 mM to 1.22 M) with linearity (R = 0.7898) in short response time (10.0 sec).
Breeding Strategies for Improving Rice Yield—A Review  [PDF]
Mudasir Hafiz Khan, Zahoor Ahmad Dar, Sher Ahmad Dar
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.65046
Abstract: An increase in productivity is always one of the main goals of any crop breeding program including rice. However, many goals can be identified for this crop varying in importance from region to region, country to country, and even within a given country. Increase in grain yield potential is the major goal of almost all rice breeders programs. The major impacts are related to the development of new strategies to increase the genetic grain yield potential of the varieties. Rice breeders have been very successful in improving the crop. Some milestones are the contribution to the green revolution with the semi-dwarf varieties, the new rice plant type and hybrid rice. The main breeding method used to improve rice is the pedigree, but development of hybrids and population improvement are added to the breeder’s portfolio. Breeders have been taking advantage of biotechnology tools to enhance their breeding capacity; however, many programs are still struggling on how to integrate them into the breeding programs and how to balance the allocation of resources between conventional and modern tools.
Effect of Firm Structure on Corporate Cash Holding (Evidence from Non-Financial Companies)  [PDF]
Sher Khan, Zhuangzhuang Peng, Sohail Ahmad, Shahid Mahmood, Ijaz Ahmad
Journal of Financial Risk Management (JFRM) , 2019, DOI: 10.4236/jfrm.2019.81001
Abstract: The purpose of this study is to investigate the effect of firm structure (whether diversified or focused firms) on corporate cash holding. Samples of 80 non-financial companies were selected including diversified and focused firms which were listed on Karachi stock exchange for a period 7 years from 2006 to 2013. These diversified and focused firms were selected on the basis of equal proportionate method. Random effect model and descriptive statistics were used for the analysis of these variables. The results of these models showed that there is negative and significant effect of firm structure on corporate cash holding. We also find negative and significant relationship of leverage and Networking capital with the corporate cash holdings and the relation between growth opportunities and corporate cash holding was examined to be positive and significant. We also find a negative and insignificant relationship between firm size and corporate cash holding. The descriptive statistics showed that there was significant difference between the cash holding of diversified and focused firms. The diversified firms keep a smaller amount of cash as compare to the single segment companies (focused firms), which is in support of the trade-off theory. This paper contributes to current literatures with regard to organization structure (whether diversified or focused firms) on cash holding in a developing economy like Pakistan.
Estimation of heterotic effects for yield and its components in bread wheat
(Triticum aestivum L.)

Abdus Salam Khan,Arif Sher
Pakistan Journal of Biological Sciences , 1999,
Abstract: Heterosis was estimated over mid and better parents, for yield and some important yield components in 20 crosses of wheat involving one local variety viz. Inq. 91 and four promising lines viz. 6039-4, 8284, 4943 and 4770. Grain yield per plant showed maximum heterosis over the mid parent (44.30%) followed by 1000-grain weight (28.65%), plant height (13.40%) and number of tillers per plant (12.23%). The maximum heterobeltiosis was recorded for grain yield per plant (34.54%), 1000-grain weight (23.52%), number of tillers per plant (11.20%) and plant height (6.60%).
State Of The Art In Digital Steganography Focusing ASCII Text Documents
Khan Farhan Rafat,Muhammad Sher
Computer Science , 2010,
Abstract: Digitization of analogue signals has opened up new avenues for information hiding and the recent advancements in the telecommunication field has taken up this desire even further. From copper wire to fiber optics, technology has evolved and so are ways of covert channel communication. By "Covert" we mean "anything not meant for the purpose for which it is being used". Investigation and detection of existence of such cover channel communication has always remained a serious concern of information security professionals which has now been evolved into a motivating source of an adversary to communicate secretly in "open" without being allegedly caught or noticed. This paper presents a survey report on steganographic techniques which have been evolved over the years to hide the existence of secret information inside some cover (Text) object. The introduction of the subject is followed by the discussion which is narrowed down to the area where digital ASCII Text documents are being used as cover. Finally, the conclusion sums up the proceedings.
On The Limits Of Perfect Security For Steganographic System
Khan Farhan Rafat,M. Sher
Computer Science , 2013,
Abstract: Until now the discussion on perfect security for steganographic systems has remained confined within the realm of mathematicians and information theory experts whose concise and symbolic representation of their philosophies, postulates, and inference thereafter has made it hard for the na\"ive academics to have an insight of the concepts. This paper is an endeavor not only to appraise on the limitations of one of such pioneer comprehensions but also to illustrate a pitfall in another scheme that asserts on having perfect security without the use of public or secret key. Goals set are accomplished through contrasting test results of a steganographic scheme that exploits English words with corresponding acronyms for hiding bits of secret information in chat - a preferred way to exchange messages these days. The misapprehension about perfect security and reign in characteristic of stego key in bit embedding process are unfolded respectively by launching elementary chosen-message and chosen-cover attack, and through proposed enhancement of target scheme.
Syntheses and antimicrobial activities of amide derivatives of 4-[(2-isopropyl-5-methylcyclohexyl)oxo]-4-oxobutanoic acid  [PDF]
Auj e Sana, Sher Wali Khan, Javid H. Zaidi, Nida Ambreen, Khalid Mohammed Khan, Shahnaz Perveen
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.310110
Abstract: Chiral 4-[(2-isopropyl-5-methylcyclohexyl)oxo]-4-oxobutanoic acid reacts with substituted anilines to produce amides 1-6 in high yields. Resulted amides 1-6 were investigated for their antifungal and antibacterial activities. Compounds 2 (96.5%) against Aspergillus fumigatus and 6 (93.7%) against Helminthosporium sativum demonstrated excellent activities. However, compounds 3 (37.6%) against Bacillus subtilis, 4 (33.2%) against Pseudomonas aurignosa, 5 against Klebsiella pneumonia demonstrated excellent growth inhibition potential.
Evaluation of Wheat Varietal Performance under Different Nitrogen Sources  [PDF]
Aaqil Khan, Ahmad Khan, Jincai Li, Muhammad Irfan Ahmad, Alam Sher, Arif Rashid, Waqar Ali
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.83039
Abstract: Nitrogen fertilization plays a very important role for crop productivity. New developed wheat varieties need proper fertilization for improved crop productivity. The present study was carried out to quantify, the effects of nitrogen derived from urea and FYM on the four newly developed wheat varieties i.e. Siran-2009, Ata Habib, Janbaz-2009 and Pirsabak-2008 for yield improvement, quality and soil fertility status. The N treatments were control, 100% of the recommended nitrogen from urea as well as FYM, and 50% from each source. The experiment was carried out at New Developmental Farm, Khyber Pakhtunkhwa Agricultural University Peshawar Pakistan, during Rabi 2011-2012. Results of the data showed that Janbaz-2009 was more responsive to biological yield (11,011 kg·ha-1), grain yield (4339 kg·ha-1), and nitrogen use efficiency (14.8%), whereas Siran-2010 performed better for grain N contents (2.31%). Plots having both urea and FYM had improved biological yield (11,958 kg·ha-1), and grain yield (4901 kg·ha-1). Urea application had improved straw N contents (0.92%) in addition to Mix application of urea and FYM (0.93%). Mix application of both sources and sole FYM had higher grains N content (2.25%), whereas control plots in addition to mix application had improved nitrogen use efficiency (14.8%). Siran-2010 and Janbaz-2009 performed better in FYM and mix FYM and urea plots for most of the parameters. It was concluded from the experiment that Janbaz-2009 had improved yield and yield components, whereas Siran-2010 had improved the grain N content. Similarly, Mix application of FYM and urea had improved crop productivity, soil fertility and grains as well as straw N content. Thus wheat varieties Janbaz-2009 sown in mix FYM and urea is recommended for general cultivation in agro-climatic condition of Peshawar.
Towards the Spatial Database Specification for GIS using Z-Notations
Farooq Ahmad,Salahuddin Khan,Sher Afzal Khan
Lecture Notes in Engineering and Computer Science , 2012,
Impact of Devolution on Public Service Delivery: An empirical study of District Government Dera Ismail Khan
Najeebullah khan,Shadiullah Khan,Sher Kamal
Current Research Journal of Social Science , 2012,
Abstract: Despite devolving substantial resources and Prowers to local levels to improve public service delivery, anecdotal evidence suggests that service delivery in Pakistan is still far behind from expectations. This paper aims to examine the impacts and consequences of devolution on public service delivery in District Dera Ismail Khan, KPK, Pakistan. We developed and tested a set of empirical measures to identify the real patterns of public service delivery on one hand and to assess the impacts of factors (both demographic and other) on the delivery of public services on the other. The results indicate many reasons for poor service delivery however, limited transparency and poor monitoring system is the most critical. Furthermore, Data show that poverty is causing many problems including unawareness of masses from their interests and duties at the public level thereby giving free hand to the ruling elite in exploiting public resources for self-interest at the cost of public goods.
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