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Search Results: 1 - 10 of 8216 matches for " Imran Khan "
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Structural and Electrical Characterization of Sintered Silicon Nitride Ceramic  [PDF]
Imran Khan, M. Zulfequar
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.27102
Abstract: The electrical conduction phenomena, dielectric response and microstructure have been discussed in sintered silicon nitride ceramics at different temperature and frequencies. Microstructure and phase of the sintered samples was investigated by Scanning Electron Microscope (SEM) and X-ray diffractometer (XRD). The electrical conductivity, dielectric constant and dielectric loss increases exponentially with temperature greater than 600 K. The dielectric constant and loss have been measured in the frequency range 100 Hz to 1 MHz. The a.c. conduction studies in the audio frequency range 500 Hz to 1 MHz indicates that the conduction may be due to the electronic hopping mechanism. Silicon Nitride ceramics became dense after sintering. The effect of grain size and role of phase on electrical and dielectric properties have been discussed. These types of samples can be used as a high temperature semi conducting materials for device packaging.
Spatio-Temporal Land Cover Dynamics in Open Cast Coal Mine Area of Singrauli, M.P., India  [PDF]
Imran Khan, Akram Javed
Journal of Geographic Information System (JGIS) , 2012, DOI: 10.4236/jgis.2012.46057
Abstract: Singrauli is an opencast coal mining area where large scale mining activities are going on continuously, land use/land cover studies are of vital importance to observe the changes in the land use/land cover. The present study utilizes multi-spectral/multi-temporal data of Indian Remote Sensing Satellite (IRS) LISS II geocoded (FCC) of 4th May 1993 and LISS III of 4th May 2010 for thematic mapping. Survey of India toposheet 63L/12 on scale 1:50,000 were used for preparation of base map which was overlaid on the FCC for land use/land cover mapping through visual interpretation. Visual interpretation of satellite imagery led to the identification of 15 land use/land cover categories such as dense forest, open forest, open scrub, plantation, cultivated land, uncultivated land, mining pit, overburden dumps, wasteland and settlement. The ground truth verification was carried out in key areas to rectify the errors in generated maps and then land use/land cover maps were finalized. The comparative analysis of land use/land cover shows that dense forest has been degraded to open forest, open scrubs and mining pits due to the expansion of mining activity. Open scrubs has increased, overburden dumps has increased, settlement has also increased, cultivated land has decreased and changed into uncultivated land and wasteland. It has also been observed that the plantation has been done on overburden dumps and residential colonies of NCL and NTPC. It has been identified that the main drivers which has increased the rate of change in land use/land cover are mainly coal mining activities and industrial expansion.
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.
An Efficient Neural Network based Algorithm of Steganography for image
Imran khan
International Journal of Computer Technology and Electronics Engineering , 2011,
Abstract: To provide large capacity of the hidden secret data and to maintain a good visual quality of stego-image a novel steganographic method based on neural network and random selection of edged areas of pixels is proposed in this research paper. Firstly a cover image is divided into a non-overlapping two pixels block and this pixel block generates a set of edged non-overlapping regions. After this a neural network is applied which generates a stego-image which has been immune against conventional attack and performs good perceptibility compared to other steganographic approaches. From our experimental results it can be shown that the proposed method hides information in edged regions and maintains a better visual display of stego image than the traditional methods.
Phosphorus Solubility from Rock Phosphate Mixed Compost with Sulphur Application and Its Effect on Yield and Phosphorus Uptake of Wheat Crop  [PDF]
Kashif Khan, Muhammad Sharif, Imran Azeem, ? Ibadullah, Adnan Anwar Khan, Sajid Ali, Imran Khan, Aamir Khan
Open Journal of Soil Science (OJSS) , 2017, DOI: 10.4236/ojss.2017.712028
Abstract: A field experiment was conducted to determine the effect of sulphur application with Rock phosphate mixed compost on phosphorus (P) solubility and its effect on yield and P uptake of wheat crop. The experiment was laid out in randomized complete block design (RCBD) with three replications at the research farm of The University of Agriculture Peshawar. The experiment was conducted during rabi 2015-16 with plot size of 3 m × 5 m. Nitrogen, phosphorus and potassium were applied at the rate of 120, 90 and 60 kg·ha-1 in the form of urea, compost, or single super phosphate and potassium sulphate, respectively. Elemental sulphur was applied at the rate of 10, 20 and 30 kg·ha-1 at the time of sowing. Results showed that sulphur applied with compost significantly improved wheat yield and yield components, soil organic matter, soil total N and AB-DTPA extractable P contents, plant N and P concentrations and their uptake, plant micronutrients concentration and their uptakes. No significant changes were noted in soil pH, ECe and lime contents. Maximum grain yield of 4076 kg·ha-1, total dry matter yield 9721 kg·ha-1, straw yield 5644 kg·ha-1, plant height 98.3 cm, spike length 11.2 cm, grain per spike 61.0, thousand grain weight 50.2 g were recorded on the application of S at the rate 20 kg·ha-1 with compost. The highest soil organic matter content of 1.41% was
The Effects of a Backward Bifurcation on a Continuous Time Markov Chain Model for the Transmission Dynamics of Single Strain Dengue Virus  [PDF]
Adnan Khan, Muhammad Hassan, Mudassar Imran
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.44091
Abstract:

Global incidence of dengue, a vector-borne tropical disease, has seen a dramatic increase with several major outbreaks in the past few decades. We formulate and analyze a stochastic epidemic model for the transmission dynamics of a single strain of dengue virus. The stochastic model is constructed using a continuous time Markov chain (CTMC) and is based on an existing deterministic model that suggests the existence of a backward bifurcation for some values of the model parameters. The dynamics of the stochastic model are explored through numerical simulations in this region of bistability. The mean of each random variable is numerically estimated and these are compared to the dynamics of the deterministic model. It is observed that the stochastic model also predicts the co-existence of a locally asymptotically stable disease-free equilibrium along with a locally stable endemic equilibrium. This co-existence of equilibria is important from a public health perspective because it implies that dengue can persist in populations even if the value of the basic reproduction number is less than unity.

Influence of Various Row Spacing on the Yield and Yield Components of Raya Anmol and Faisal Canola under Coastal Climatic Conditions of Lasbela  [PDF]
Muhammad Waseem, Dost Mohammad Baloch, Imran Khan
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.515237
Abstract:

During 2013-2014 a field experiment was conducted at experimental area of Faculty of Agriculture under Lasbela University of Agriculture, Water and Marine Science, Uthal, Lasbela to evaluate the influence of various row spacing on the yield and yield components of Raya Anmol and Faisal Canola under coastal climatic conditions of Lasbela. Randomized complete block design (RCBD) with factorial arrangement having 3 replications was used. Experiment comprises two canola varieties, C1 = Raya Anmol, C2 = Faisal Canola at 3 row spacing distances RS1 = 30 cm, RS2 = 45 cm and RS3 = 60 cm respectively. Result showed that yield and yield contributing traits are significant. It was concluded that seed yield of C1 (Faisal Canola) was better as compared to that of Raya Anmol. Row spacing (RS3 = 60 cm) yielded more crop canopy and the highest number of pod per plant, pod length and seed yield under agro climatic condition of Lasbela as compared to other densely arranged row spacing.

Is Trafficking Main Direct Pushing Factor for Engaging in Sex Trade: A Study at Kandapara Brothel Tangail, Bangladesh
Md. Imran Khan
The Social Sciences , 2013, DOI: 10.3923/sscience.2010.305.311
Abstract: The sex market is expanding at an unprecedented pace and touching every strata of the society. Over the last decade thousands of Bangladeshi girls were lured under false circumstances and sold into the sex industries in different nations including Bangladesh. To analyze whether trafficking is the main direct pushing factor for engaging in sex trade and to find out the factors which influence the trafficking; we have conducted the study. Total 729 sex workers at Kandapara brothel, Tangail in Bangladesh were the targeted population of the study. A semi structured data collection instrument was developed and data were entered in Statistical Package for Social Scientist (SPSS) 12-version. We have found trafficking is significantly different as direct pushing factor than any other pushing factors; it is the main direct pushing factor for engaging in sex trade. Age, education, poverty or unemployment, marital status, geographical area and previous occupation influence trafficking for engaging in sex trade.
Variance minimization variational Monte Carlo method
Imran Khan,Bo Gao
Physics , 2007,
Abstract: We present a variational Monte Carlo (VMC) method that works equally well for the ground and the excited states of a quantum system. The method is based on the minimization of the variance of energy, as opposed to the energy itself in standard methods. As a test, it is applied to the investigation of the universal spectrum at the van der Waals length scale for two identical Bose atoms in a symmetric harmonic trap, with results compared to the basically exact results obtained from a multiscale quantum-defect theory.
Bose atoms in a trap: a variational Monte Carlo formulation for the universal behavior at the Van der Waals length scale
Imran Khan,Bo Gao
Physics , 2006, DOI: 10.1103/PhysRevA.73.063619
Abstract: We present a variational Monte Carlo (VMC) formulation for the universal equations of state at the Van der Waals length scale [B. Gao, J. Phys. B \textbf{37}, L227 (2004)] for $N$ Bose atoms in a trap. The theory illustrates both how such equations of state can be computed exactly, and the existence and the importance of long-range atom-atom correlation under strong confinement. Explicit numerical results are presented for N=3 and 5, and used to provide a quantitative understanding of the shape-dependent confinement correction that is important for few atoms under strong confinement.
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