Natural Sciences: Recent submissions

Now showing items 101-120 of 6213

The Blood Flow of Prandtl Fluid Through a Tapered Stenosed Arteries in Permeable Walls with Magnetic Field

Ellahi, R.; S.U., Rahman; Nadeem, S. (Chinese Physical Society and IOP Publishing Ltd, 2015-01-01)

This Communication deals with the blood flow of Prandtl fluid through a tapered stenosed arteries having permeable walls. The governing equations of two-dimensional Prandtl fluid model are modelled in cylindrical coordinates. ...
Gamma Dosimetry with CR-39 Etch Track Detector

Matiullah; Dogar, Ashiq Hussain; Ahmad, Nasir; Amin, Masood (The Japan Society of Applied Physics, 1999-01-01)

To preserve and improve the safety of food for commercial purposes, it is exposed to high gamma-ray doses. The gamma-ray doses used for this purpose range from 0.15 kGy to 50 kGy. At such high doses, the etching characteristics ...
Continuous facile synthesis of nano-sized zinc oxide and its optical properties

Akram, Muhammad; Razali, Ili Rabihah; Ghafoor, Faisal; Shams Ur-Rahman; Butt, Faheem K; Hussain, Rafaqat (Institute of Physics Publishing, 2018-07-11)

Zinc oxide (ZnO) was synthesized by using continuous microwave (Mw) flow synthesis. The synthesized nanoparticles were characterized by x-ray diffraction and transmission electron microscopy techniques to study the phase ...
Effect of thermal annealing on the structural and optical properties of ZnO thin films deposited by the reactive e-beam evaporation technique

Mahmood, A; Ahmed, Nadeem; Raza, Q; Khan, Taj Muhammad; Mehmood, M; Hassan, M M; Mahmood, N (The Royal Swedish Academy of Sciences, 2010-11-15)

Crystalline zinc oxide (ZnO) thin films with highly preferential c-axis-oriented crystals were prepared using the reactive e-beam evaporation technique. Prior to deposition, ZnO targets were prepared from ZnO (99.999%) ...
ZnO nanoparticles as drug delivery agent for photodynamic therapy

Rahim, S; Atif, M; Aziz, M Hammad; Malick, M Imran; Suleman, R; Zaidi, S S Z; Majid, A (Laser Physics Letters Astro Ltd, 2014-01-01)

Multidrug resistance (MDR) limits the success of many tumoricidal drugs. Non-significant accumulation of the drug into the target site is one major problem in photodynamic therapy. Nanoparticles are extensively used as ...
Mixed Convection Heat Transfer in Micropolar Nanofluid over a Vertical Slender Cylinder

Abdul Rehman; Nadeem, S. (Chinese Physics Letters, 2012-01-01)

Analysis is carried for the problem of boundary layer steady flow and heat transfer of a micropolar fluid containing nanoparticles over a vertical cylinder. The governing partial differential equations of linear momentum, ...
On cracking of charged anisotropic polytropes

Azam, M.; Mardan, S.A. (IOP Publishing Ltd and Sissa Medialab srl, 2017-01-20)

Recently in [1], the role of electromagnetic field on the cracking of spherical polytropes has been investigated without perturbing charge parameter explicitly. In this study, we have examined the occurrence of cracking ...
Dynamics of Particles Around a Regular Black Hole with Nonlinear Electrodynamics

Jawad, Abdul; Ali, Farhad; Jamil, Mubasher (2016-01-01)

We investigate the dynamics of a charged particle being kicked off from its circular orbit around a regular black hole by an incoming massive particle in the presence of magnetic field. The resulting escape velocity, escape ...
Radiation-Induced Nano-Explosions at the Solid Surface: Near Surface Radiation Damage in CR-39 Polymer

Rana, Mukhtar Ahmed (Chinese Physical Society and IOP Publishing Ltd, 2011-01-01)

New measurements of fission fragment and alpha particle induced surface damage in the most sensitive and commonly used nuclear track detector CR-39 are presented here. Precisely designed and optimized exposure and chemical ...
Nitriding molybdenum: Effects of duration and fill gas pressure when using 100-Hz pulse DC discharge technique

Ikhlaq, U.; Ahmad, R.; Shafiq, M.; Saleem, S.; Shah, M. S.; Hussain, T. (Chinese Physical Society and IOP Publishing Ltd, 2014-08-20)

Molybdenum is nitrided by a 100-Hz pulsed DC glow discharge technique for various time durations and fill gas pressures to study the effects on the surface properties of molybdenum. X-ray diffractometry (XRD), scanning ...
A Variant of the Classical Von Kármán Flow for a Couple Stress Fluid

Farooq, A. A.; Siddiqui, A. M.; Rana, M. A.; Haroon, T. (Chinese Physics Letters, 2012-01)

We present an attempt to study the influence of couple stresses on the flow induced by an infinite disk rotating with a constant angular velocity. The governing equations of motion in three dimensions are treated analytically ...
Adaptive step-size modified fractional least mean square algorithm for chaotic time series prediction

Shoaib, Bilal; Qureshi, Ijaz Mansoor; Shafqatullah; Ihsanulhaq (Chinese Physics B, 2014-01-01)

This paper presents an adaptive step-size modified fractional least mean square (AMFLMS) algorithm to deal with a nonlinear time series prediction. Here we incorporate adaptive gain parameters in the weight adaptation ...
Dispersion of radionuclides released into a stable planetary boundary layer using a Monte Carlo model

Basit, Abdul; Raza, S Shoaib; Irfan, Naseem (Journal of Radiological Protection, 2006-01-01)

In this paper a Monte Carlo model for describing the atmospheric dispersion of radionuclides (represented by Lagrangian particles/neutral tracers) continuously released into a stable planetary boundary layer is presented. ...
Groundwater Quality Assessment Using AveragedWater Quality Index: A Case Study of Lahore City,Punjab, Pakistan

Shahid, Syed Umair; Iqbal, Javed (Earth and Environmental Science, 2016-01-01)

Water quality is considered as a major issue in mega cities of developing countries. The city of Lahore has over 10 million populations with the highest population density in the Punjab Province, Pakistan. Groundwater is ...
Study of the reaction K-p→ηΛ

Fazal -e-Aleem; Saleem, Mohammad; Qureshi, Imtinan Elahi (Communications in Theoretical Physics, 1983-01-01)

It is shown that at high energy all available data for differential and integrated cross sections and Λ-polarisation in the reaction K-p→ηΛ can be fitted by using a simple Regge pole model with phenomenological residue ...
Comparative study of SVPWM (space vector pulsewidth modulation) & SPWM (sinusoidal pulse widthmodulation) based three phase voltage sourceinverters for variable speed drive

Ahmed, Waheed; Ali, Syed M Usman (Materials Science and Engineering, 2013-01-01)

We have performedcomparative studies of Space Vector Pulse Width Modulation (SVPWM) and Sinusoidal Pulse Width Modulation (SPWM)techniques utilizing MATLAB tools. During these investigations, we ...
Wireless Control of Miniaturized Mobile Vehicle forIndoor Surveillance

Saquib, Sye d M Taha; Hameed, Sarmad; Ali, Syed M Usman; Jafri, Raza; Amin, Imran (Materials Science and Engineering, 2013-01-01)

This work is based upon electronic automation and Smart Control techniques, which constitute the bDVLV of Control Area Network (CAN) and Personal Area Network (PAN). Bluetooth technology has been interfaced ...
Scope for biological sensing technologies in meatproduction and export in northern Pakistan

Qureshi, M S; Qureshi, I H (Materials Science and Engineering, 2013-01-01)

The Khyber Pakhtunkhwa province of Pakistan is rich in livestock resources, including 14.84 million sheep and goats (valued at US$1.60 billion) and a 27% share of the national poultry sector(having an investment ...
Fabrication and Structural Characterization of Co-implanted Ultra Shallow Junctions for Integration inPiezoresistive Silicon Sensors Compatible withCMOS Processing

Ahmed, S; Mustafa, R (Materials Science and Engineering, 2013-01-01)

Fabrication and structural characterization of Indium and Carbon imp lanted n -type Silicon layers forming ultra-shallow junction for integration in piezoresistive sensors compatible with CMOS processing ...
On the Inclination of Planetary Orbits

Mian, Z.U.; Qadir, Asghar; Quamar, Jawaid (China Ocean Press, 1989-01-01)

Assuming that planets were formed in the equatorial plane of the Sun and that there was a small perturbation at the start, it is shown that relativistic effects could lead to the planetary orbit tilting observed. On the ...

Now showing items 101-120 of 6213

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