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Articles by S.F. Shaukat
Total Records ( 3 ) for S.F. Shaukat
  S.F. Shaukat , R. Farooq , M.A.U. Khan , A. Rashid and Y. Dong
  The optical and electrical properties of Copper-Indium-Selenium (CIS) thin films have been investigated using various experimental techniques. These compounds are extensively used in solar cell technology due to their exciting characteristics. CIS thin films have been grown onto glass substrates by a Stacked Element Layer (SEL) deposition technique in vacuum. Optical transmission measurements on different compositions of CIS films are observed and the absorption coefficient is determined. The Van der Pauw technique is used to divulge the electrical characteristics of these films. The electrical conductivity is found relatively high for the films annealed in vacuum but decreases for the films synthesised optimally. It is observed that p-type films have higher conductivity than n-type films. The reaction temperature of CIS formation is 250°C in vacuum. These properties are of great significance in manufacturing solar sell devices.
  S.F. Shaukat , Atiq-ul-Inam , M.A.U. Khan , Anjum Shah , R. Farooq , Tayyab Rasul , Zaubair Khalid and M. Bilal Qureshi
  The access to seamless multimedia services, browsing on internet, high speed and wide band data transmission are the basic requirements for the research and development. The cables play a pivotal role in getting the benefits from all these advancements in communication technology. To study various characteristics of cables, an extensive research has been carried out on a variety of cables. A variety of physical, electrical and numerical techniques have been utilized to characterize coaxial, twisted pair and twin lead cables. It has been revealed that coaxial cables are more suitable for real time data transmission due to their low attenuation, high velocity of propagation and their immunity to physical and environmental hazards. The main advantage of coaxial cables is its high bandwidth. The significance of other data cables cannot be ruled out but from different analytical techniques Radio Guide (RG)7/U has been proved to be the best cable for data transmission.
  Robina Farooq , S.F. Shaukat , Abida K. Khan and Umar Farooq
  A cost effective method of decomposition was developed for industrial effluents by using ultrasound in combination of H2O2. The process was optimized by studying the decomposition of methidathion pesticide at different frequencies, different ultrasonic wave amplitudes, pH and concentrations of the solutions. It was shown that the rate of sonochemical decomposition was directly linked to the OH° availability in the solution. The degradation was more efficient for the higher frequency because the rates of OH° formation in water saturated with air were more at higher frequency. It was observed that higher the ultrasonic frequency, higher was the energy consumption. This problem of higher energy consumption was resolved by increasing the concentration of H2O2. Ultrasound/H2O2 process gave better decomposition than ultrasound alone. Decomposition of methidathion was effective with ultrasound at greater sound wave amplitude. When the pH was controlled below the pk value of methidathion, significantly better decomposition of methidathion resulted. The decomposition of methidathion appeared to follow first-order reaction kinetics. The reaction rate constant (k) was greater at smaller pH and there is an exponential relation between them.
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