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Search Results: 1 - 10 of 2381 matches for " Riaz Aziz Minhas "
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Habitat Utilization and Feeding Biology of Himalayan Grey Langur (Semnopithecus entellus ajex) in Machiara National Park, Azad Kashmir, Pakistan
喜马拉雅灰叶猴栖息地利用和食性生物学研究(英文)

Riaz Aziz Minhas,Khawaja Basharat Ahmed,Muhammad Siddique Awan,Naeem Iftikhar Dar
动物学研究 , 2010,
Abstract: Habitat utilization and feeding biology of Himalayan Grey Langur (Semnopithecus entellus ajex) were studied from April, 2006 to April, 2007 in Machiara National Park, Azad Kashmir (Pakistan). The results showed that in the winter season the most preferred habitat of the langurs was the moist temperate coniferous forests interspersed with deciduous trees, while in the summer season they preferred to migrate into the subalpine scrub forests at higher altitudes. Langurs were folivorous in feeding habit, recorded as consuming more than 49 plant species (27 in summer and 22 in winter) in the study area. The mature leaves (36.12%) were preferred over the young leaves (27.27%) while other food components comprised of fruits (17.00%), roots (9.45%), barks (6.69%), flowers (2.19%) and stems (1.28%) of various plant species.
Area Efficient Implementation of MTI Processing Module on a Reconfigurable Platform
Munaza Yousuf,Arshad Aziz,Riaz Mahmud
Chinese Journal of Engineering , 2014, DOI: 10.1155/2014/167184
Abstract: This paper presents an area efficient Field Programmable Gate Array (FPGA) based digital design of a processing module for MTI radar. Signal contaminated with noise and clutter is modelled to test the efficacy of the design algorithms. For flexibility of design and to achieve optimized results, we have combined the high-level utility of MATLAB with the flexibility and optimization on FPGA for this implementation. Two- and three-pulse cancellers are chosen for design due to its simplicity in both concept and implementation. The results obtained are efficient in terms of enhanced throughput per Slice (TPA) of 1.146, that is, occupying fewer area resources on hardware while achieving optimized speed. The outcomes show that this design of MTI radar processor has many advantages, such as high processing precision, strong processing ability, real time, and low cost. All these advantages greatly contribute to the design requirements and make it appropriate for the application of high-speed signal processing. 1. Introduction In radar systems, it is often desirable to be able to differentiate between moving targets and those that are stationary. This information can greatly serve operators when the surveillance targets of interest, such as vehicles or aircraft, are located in environments with a high density of traffic, clutter, stationary, and slow moving targets. Fortunately, through the use of digital signal processing, it is possible to extract this information from the system in real time using a Moving Target Indicator (MTI) filter [1]. Modern radar systems have evolving requirements, both in how the systems are designed and how the end user uses the data. This results in design change in electronic systems affecting both the military and commercial design communities, that is, the need for smaller, energy-efficient systems with high processing-power requirements. This makes low power consumption key drivers in most designs of high speed systems. More digital logic also allows designers to make early decisions on actionable intelligence and to meta-tag sensor data earlier for more efficient analysis. These and other emerging techniques will allow for the creation of better radar systems, but each requires additional signal-processing resources. One of these resources is the emerging class of high-performance FPGAs. Moving Target Indicator (MTI) radars are developed and used extensively to detect and follow specific moving targets and eliminate clutters. Processing system in the radar is massive and complex, since it is required to perform at high
Properties Evaluation of Concrete using Local Used Bricks as Coarse Aggregate  [PDF]
Riaz Bhanbhro, Irfanullah Memon, Aziz Ansari, Ahsan Shah, Bashir Ahmed Memon
Engineering (ENG) , 2014, DOI: 10.4236/eng.2014.65025
Abstract: With time concrete / reinforced concrete has become the popular material for construction. Modern industry utilizes this material a lot and has produced various beautiful, eye catching and amazing structures. Due to modern requirements for living and developed construction industries, the old buildings (usually constructed with brick masonry) are demolished and are replaced with new modern buildings. Demolition of buildings results in waste materials which can create waste related problems and environmental issues. By using recycled aggregates weight of concrete can also be reduced, which can also solve problems related to self-weight of concrete. In this paper attempt has been made to use local used bricks from vicinity of Nawabshah, Pakistan, as coarse aggregate. Concrete cubes made with local recycled bricks are cast and tested for overall weight of concrete, moisture content, dynamic modulus of elasticity and compressive strength (nondestructive and destructive methods). The results showed that concrete derived from recycled aggregates attained lower strength than regular concrete. More detailed elaborated work is recommended with different mix ratios and different proportions recycled aggregates for better conclusions.
Electrical characterisation of deep level defects in Be-doped AlGaAs grown on (100) and (311)A GaAs substrates by MBE
Mari Riaz,Shafi Muhammad,Aziz Mohsin,Khatab Almontaser
Nanoscale Research Letters , 2011,
Abstract: The growth of high mobility two-dimensional hole gases (2DHGs) using GaAs-GaAlAs heterostructures has been the subject of many investigations. However, despite many efforts hole mobilities in Be-doped structures grown on (100) GaAs substrate remained considerably lower than those obtained by growing on (311)A oriented surface using silicon as p-type dopant. In this study we will report on the properties of hole traps in a set of p-type Be-doped Al0.29Ga0.71As samples grown by molecular beam epitaxy on (100) and (311)A GaAs substrates using deep level transient spectroscopy (DLTS) technique. In addition, the effect of the level of Be-doping concentration on the hole deep traps is investigated. It was observed that with increasing the Be-doping concentration from 1 × 1016 to 1 × 1017 cm-3 the number of detected electrically active defects decreases for samples grown on (311)A substrate, whereas, it increases for (100) orientated samples. The DLTS measurements also reveal that the activation energies of traps detected in (311)A are lower than those in (100). From these findings it is expected that mobilities of 2DHGs in Be-doped GaAs-GaAlAs devices grown on (311)A should be higher than those on (100).
Serum ferritin levels, socio-demographic factors and desferrioxamine therapy in multi-transfused thalassemia major patients at a government tertiary care hospital of Karachi, Pakistan
Haris Riaz, Talha Riaz, Muhammad Khan, Sina Aziz, Faizan Ullah, Anis Rehman, Qandeel Zafar, Abdul Kazi
BMC Research Notes , 2011, DOI: 10.1186/1756-0500-4-287
Abstract: The study was conducted in the Pediatric Emergency unit of Civil Hospital Karachi after ethical approval by the Institutional Review Board of Dow University of Health Sciences. Seventy nine cases of beta thalassemia major were included after a written consent. The care takers were interviewed for the socio-demographic variables and the use of Desferrioxamine therapy, after which a blood sample was drawn to assess the serum Ferritin level. SPSS 15.0 was employed for data entry and analysis.Of the seventy-nine patients included in the study, 46 (58.2%) were males while 33 (41.8%) were females. The mean age was 10.8 (± 4.5) years with the dominant age group (46.2%) being 10 to 14 years. In 62 (78.8%) cases, the care taker education was below the tenth grade. The mean serum Ferritin level in our study were 4236.5 ng/ml and showed a directly proportional relationship with age. Desferrioxamine was used by patients in 46 (58.2%) cases with monthly house hold income significant factor to the use of therapy.The mean serum Ferritin levels are approximately ten times higher than the normal recommended levels for normal individuals, with two-fifths of the patients not receiving iron chelation therapy at all. Use of iron chelation therapy and titrating the dose according to the need can significantly lower the iron load reducing the risk of iron-overload related complications leading to a better quality of life and improving survival in Pakistani beta thalassemia major patients.Conflicts of Interest: NoneBeta thalassemia ranks first amongst the genetic disorders associated with haemoglobin synthesis in terms of prevalence and it is the result of an inherited defect in the synthesis of the beta chain of the adult haemoglobin. Consequently the erythropoiesis is defective and anemia is produced [1]. Considering the 5 to 7% carrier rate in Pakistan, the number of carriers is expected to approach 10 million [2]. This grades thalassemia as one of the most common inherited disorders in
Integrating Formal Methods in XP—A Conceptual Solution  [PDF]
Shagufta Shafiq, Nasir Mehmood Minhas
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.74029
Abstract:

Formal methods can be used at any stage of product development process to improve the software quality and efficiency using mathematical models for analysis and verification. From last decade, researchers and practitioners are trying to establish successful transfer of practices of formal methods into industrial process development. In the last couple of years, numerous analysis approaches and formal methods have been applied in different settings to improve software quality. In today’s highly competitive software development industry, companies are striving to deliver fast with low cost and improve quality solutions and agile methodologies have proved their efficiency in acquiring these. Here, we will present an integration of formal methods, specifications and verification practices in the most renowned process development methodology of agile i.e. extreme programming with a conceptual solution. That leads towards the development of a complete formalized XP process in future. This will help the practitioners to understand the effectiveness of formal methods using in agile methods that can be helpful in utilizing the benefits of formal methods in industry.

Hyper Velocity Missiles For Defence
Faqir Minhas
Market Forces , 2005,
Abstract: The paper reviews the history of technical development in the field of hypervelocity missiles. It highlights the fact that the development of anti-ballistic systems in USA, Russia, France, UK, Sweden, and Israel is moving toward the final deployment stage; that USA and Israel are trying to sell PAC 2 and Arrow 2 to India; and that India’s Agni and Prithvi missiles have improved their accuracy, with assistance from Russia. Consequently, the paper proposes enhanced effort for development in Pakistan of a basic hypersonic tactical missile, with 300 KM range, 500 KG payload, and multi-rolecapability. The author argues that a system, developed within the country, at the existing or upgraded facilities, will not violate MTCR restrictions, and would greatly enhance the country’s defense capability. Furthermore, it would provide high technology jobs toPakistani citizens. The paper reinforces the idea by suggesting that evolution in the field of aviation and electronics favors the development of ballistic, cruise and guided missile technologies; and that flight time of short and intermediate range missiles is so short that its interception is virtually impossible.
CARYOPTERIS ODORATA: A RICH SOURCE OF ANTIOXIDANTS FOR PROTECTION AGAINST CHRONIC DISEASES AND FOOD PRODUCTS
SHAHZADI,TAYYABA; ABBASI,MUHAMMAD ATHAR; RIAZ,TAUHEEDA; REHMAN,AZIZ-UR; SIDDIQUI,SABAHAT ZAHRA; AJAIB,MUHAMMAD;
Journal of the Chilean Chemical Society , 2011, DOI: 10.4067/S0717-97072011000200012
Abstract: this study was designed to examine the in vitro antioxidant potential of the different fractions of caryopteris odorata (ham. ex roxb.). the methanolic extract of this plant was dissolved in distilled water and partitioned with n-hexane, chloroform, ethyl acetate and n-butanol, successively. these organic fractions and the remaining aqueous fraction were screened for their possible antioxidant activities by different methods: 1,1-diphenyl-2-picrylhydrazyl radical (dpph) scavenging activity, total antioxidant activity, ferric reducing antioxidant power (frap) assay and ferric thiocyanate assay. the total phenolics were also determined. the results revealed that among these fractions ethyl acetate soluble fraction showed very good antioxidant potential, having an ic50 value of 8.01 ± 0.254 μg/ml. it also exhibited the highest total antioxidant activity (2.358 ± 0.035), frap value (2505.8 ± 0.58 μg/ml), inhibition of lipid peroxidation (77.53 ± 0.784 %) value and total phenolic contents (87.08 ± 1.5μg/g) as compared to other fractions.
JUSTICIA PEPLOIDES: AN INEVITABLE SOURCE OF NATURAL ANTIOXIDANTS TO RELIEF FROM OXIDATIVE STRESS
Muhammad Athar Abbasi,Farah Khalid,Aziz-ur-Rehman,Tauheeda Riaz
International Research Journal of Pharmacy , 2013,
Abstract: The rationale of the present investigation was to assess the antioxidant potential of various fractions of Justicia peploides (Nees) T. Anders. To get various fractions, methanolic extract of the plant was dissolved in distilled water and partitioned with n-hexane, chloroform, ethyl acetate and n-butanol sequentially. Phytochemical screening showed presence of phenolics and flavonoids in more amounts in ethyl acetate and n-butanol fraction. The antioxidant potential of all these fractions and remaining aqueous fraction was evaluated by four methods: 1,1-Diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity, total antioxidant activity, Ferric reducing antioxidant power (FRAP) assay and ferric thiocyanate assay along with determination of their total phenolics. The results revealed that ethyl acetate soluble fraction exhibited highest percent inhibition of DPPH radical as compared to other fractions. It showed 82.20±1.02% inhibition of DPPH radical at a concentration of 60μg/mL. The IC50 of this fraction was 14.567±1.80μg/mL, relative to butylated hydroxytoluene (BHT, a reference standard), having IC50 of 12.33±0.87μg/mL. It also showed highest total antioxidant activity i.e. 0.92±0.06 (absorbance at 695 nm) as well as highest FRAP value (298.54±1.48 TEμM/mL), highest total phenolic contents (89.9±1.98 GAE mg/g) and highest value of inhibition of lipid peroxidation (55.04±1.46% at concentration of 500 μg/mL) as compared to the other studied fractions. n-butanol fraction also showed good results.
Phytochemical screening, free radical scavenging, antioxidant activity and phenolic content of Dodonaea viscosa
Riaz Tauheeda,Abbasi Athar Muhammad,Aziz-Ur-Rehman,Shahzadi Tayyaba
Journal of the Serbian Chemical Society , 2012, DOI: 10.2298/jsc110621183r
Abstract: The purpose of this study was to evaluate the antioxidant potential of Dodonaea viscosa Jacq. Methanolic extract of the plant was dissolved in distilled water and partitioned with n-hexane, chloroform, ethyl acetate and nbutanol sequentially. Phytochemical screening showed presence of phenolics, flavonoides and cardiac glycosides in large amount in chloroform, ethyl acetate and n-butanol fraction. The antioxidant potential of all these fractions and remaining aqueous fraction was evaluated by four methods: 1,1-Diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity, total antioxidant activity, Ferric Reducing Antioxidant Power (FRAP) assay and ferric thiocyanate assay along with determination of their total phenolics. The results revealed that ethyl acetate soluble fraction exhibited highest percent inhibition of DPPH radical as compared to other fractions. It showed 81.14 ± 1.38% inhibition of DPPH radical at a concentration of 60 μg/ml. The IC50 of this fraction was found to be 33.95 ± 0.58 μg/ml, relative to butylated hydroxytoluene (BHT), having IC50 of 12.54 ± 0.89 μg/mL. It also showed highest FRAP value (380.53 ± 0.74 μM of trolox equivalents) as well as highest total phenolic contents (208.58 ± 1.83 GAE μg/g) and highest value of inhibition of lipid peroxidation (58.11 ± 1.49% at concentration of 500 μg/ml) as compared to the other studied fractions. The chloroform fraction showed highest total antioxidant activity i.e.1.078 ± 0.59 (eq. to BHT).
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