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Articles by Umar Farooq
Total Records ( 5 ) for Umar Farooq
  Muhammad Akbar Khan , Abdul Ghaffar , Zulfiqar Ali , Umar Farooq , Zafar Hameed Bhatti and Muhammad Akhtar
  Twenty mammalian fossil specimens of varying preservational state are described from the Chinji Formation of Dhulian, Pakistan. The remains described in this study are all teeth and represent the Proboscidea, Perissodactyla and Artiodactyla. All the dental specimens are new variants recorded here for the first time. Pliotriplopus dhulianensis is new to science having small size and absence of crista than Pliotriplopus chinjiensis. These findings extend the geographic distribution of this dentally highly derived Triplopinae, which was previously restricted to a single species, Pliotriplopus chinjiensis. Additional fossils of the three mammalian orders are necessary to shed new light on the phylogenetic relationships within the first representatives of the orders in Eurasia. A very important, deciduous tooth of the species Stegolophodon cautleyi hitherto unknown is described in this report.
  Umar Farooq , Muhammad Akbar Khan and Muhammad Akhtar
  Dorcabune nagrii is a smaller species of genus Dorcabune and is known only from the Middle Siwaliks. The described specimens in this study are collected from Hasnot which is the upper part of the Middle Siwaliks include three second molars and one last molar. All the described specimens belong to the lower dentition. Dorcabune nagrii agrees with the Dorcabune latidens in respect of size but differs by the smaller breadth of molars and inferior depth of the mandible. The aim of the study is to describe Dorcabune nagrii from the upper part of the Middle Siwaliks.
  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.
  Umar Farooq , Muhammad Akbar Khan , Muhammad Akhtar and Abdul Majid Khan
  Dorcatherium majus, comparatively a large tragulid is studied from the Lower and Middle Siwaliks of Pakistan. D. majus is only found from the fresh water deposits along the foot hills of Himalayas. A number of localities are thoroughly visited from the Potwar Plateau of northern Pakistan and collected worth describing specimens of D. majus. Eight specimens are described in this study and all belong to the upper dentition of D. majus.
  Umar Farooq , Habibullah Jamal and Shoab Ahmed Khan

The paper presents high speed and computationally efficient architecture for the recursive interpolation filters for digital audio applications. Conversion of anti-imaging IIR filter that is an essential part of an interpolator, into an efficient interpolation filter is based on merged delay transformation. Any higher order filter is required to be implemented in parallel using first order and second order sections. This requirement provides the benefits of high speed processing. The optimal architectures for the first and second order sections are introduced. The computational cost is reduced up to 33.65% as compared to cascaded IIR-based interpolators and cost reduction of 89.48% is achieved as compared to polyphase FIR-based interpolators. A 1-to-4 interpolation filter is implemented on FPGA using Verilog HDL at input sampling frequency of 44.1 kHz and its power and critical path delay is compared with known architectures. Smaller critical path delay and lower computational cost are the important characteristics of this architecture which is highly desired in portable digital audio applications.

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