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Search Results: 1 - 10 of 1461 matches for " Faisal Rehman "
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Accurate Imputation for Relative Humidity over Pakistan Gathered from AQUA Satellite  [PDF]
Usman Saleem, Mian Sohail Akram, Muhammad Fahad Ullah, Faisal Rehman
Open Journal of Geology (OJG) , 2018, DOI: 10.4236/ojg.2018.810059
Abstract: The relative humidity in the atmosphere captured by AQUA satellite contains missing matrices. In order to fill such missing values four very popular imputation techniques: Bilinear, Inverse Distance Weighting, Natural Neighbor and Nearest Interpolations were tested. Mean Absolute Error (MAE), Root Mean Square Error (RMSE), Coefficient of Determination (R2) and Correlation Coefficient (Corr), were used to check the accuracy of these interpolations. It was found that the Inverse Distance Weighting and Nearest Interpolation were proved not to be suited. Natural interpolation gave accurate results than the aforementioned two interpolations. Missing values of relative humidity were accurately refilled with Bilinear Interpolation. This interpolation produced RMSE of ±0.543 for relative humidity over 100, 150, 200, 250, 300, 400, 500 hPa while for 600, 700, 850 and 925 hPa RMSE remainnear to 1. A perfect fit to the surface and very strong correlation (value near to 0.99) was found between actual and imputed relative humidity data through Bilinear Interpolation. Therefore it was concluded that the Bilinear Interpolation is the most accurate and best imputation for missing values of relative humidity form 100 to 1000 hPa levels.
MASW Survey with Fixed Receiver Geometry and CMP Cross-Correlation Technique for Data Processing: A Case Study of Wadi Fatima, Western Saudi Arabia  [PDF]
Faisal Rehman, Sherif M. El-Hady, Muhammad Faisal, Hussein M. Harbi, Muhammad Fahad Ullah, Saifur Rehman, Muhammad Kashif
Open Journal of Geology (OJG) , 2018, DOI: 10.4236/ojg.2018.85027
Abstract: Multichannel analysis of surface waves is a noninvasive technique for subsurface shear wave velocity imagining. This method is one of the most effective geophysical tools for geotechnical investigations. In this paper, we present multichannel surface wave data acquisition in a non-conventional manner in alluvium deposits. Fixed receiver and multi-source offset geometry were applied to obtain field data. The data processing comprised of generating CMP cross-correlated traces and then inversion to obtain dispersion curves. The inversion of dispersion curves is achieved by employing a genetic algorithm to obtain subsurface shear wave velocity. Finally, the one-dimensional shear wave models are obtained. The multi-source offset data acquisition with fixed receiver geometry technique in combination with CMP cross-correlation gathers for data processing worked in a quite efficient way to obtain subsurface shear wave model.
Sedimentology of Marl and Marly Limestone Sequence of Upper Cretaceous Kawagarh Formation from Northern Kalachitta Range, Attock Hazara Fold and Thrust Belt, Pakistan  [PDF]
Saif Ur Rehman, Khalid Mehmood, Muhammad Fahad Ullah, Naveed Ahsan, Faisal Rehman, Tariq Mahmood, Mahboob Ahmed
Open Journal of Geology (OJG) , 2019, DOI: 10.4236/ojg.2019.91001
Abstract: Upper Cretaceous Kawagarh Formation is well exposed in the Attock Hazara Fold and Thrust Belt (AHFTB) and shows significant lateral and vertical variations in lithology. The present work deals with the sedimentological studies of marl and marly limestone sequence of Kawagarh Formation exposed at the Bagh Neelab, Ghariala north and Sojhanda villages in Northern Kalachitta Range. Detailed petrographic studies of marly limestone and hard marl substrate show that planktons and oysters are the main skeletal constituents of studied samples and clay and detrital quartz mainly composed the non skeletal fraction. X-Ray diffraction analyses of selected marl samples confirm the petrographic data. On the basis of skeletal and non skeletal content, two microfacies—marl microfacies and Planktonic microfacies are constructed. The faunal content, their paleoecology and detrital content of microfacies suggest that marl and marly limestone sequence of Kawagarh Formation was deposited over the mid and outer ramp settings.
AQUA Satellite Data and Imputation of Geopotential Height: A Case Study for Pakistan  [PDF]
Usman Saleem, Mian Sohail Akram, Muhammad Fahad Ullah, Faisal Rehman, Muhammad Riaz Khan
Open Journal of Geology (OJG) , 2018, DOI: 10.4236/ojg.2018.810060
Abstract: In current study an attempt is carried out by filling missing data of geopotiential height over Pakistan and identifying the optimum method for interpolation. In last thirteen years geopotential height values over were missing over Pakistan. These gaps are tried to be filled by interpolation Techniques. The techniques for interpolations included Bilinear interpolations [BI], Nearest Neighbor [NN], Natural [NI] and Inverse distance weighting [IDW]. These imputations were judged on the basis of performance parameters which include Root Mean Square Error [RMSE], Mean Absolute Error [MAE], Correlation Coefficient [Corr] and Coefficient of Determination [R2]. The NN and IDW interpolation Imputations were not precise and accurate. The Natural Neighbors and Bilinear interpolations immaculately fitted to the data set. A good correlation was found for Natural Neighbor interpolation imputations and perfectly fit to the surface of geopotential height. The root mean square error [maximum and minimum] values were ranges from ±5.10 to ±2.28 m respectively. However mean absolute error was near to 1. The validation of imputation revealed that NN interpolation produced more accurate results than BI. It can be concluded that Natural Interpolation was the best suited interpolation technique for filling missing data sets from AQUA satellite for geopotential height.
Does Ownership of Higher Education Institute Influence Its HRM Patterns? The Case of Pakistan
Muhammad Faisal Qadeer,Rashid Rehman,Munir Ahmad,Muhammad Shafique
International Journal of Business and Management , 2011, DOI: 10.5539/ijbm.v6n10p230
Abstract: This paper compares HRM patterns - variables pertaining to HR department, HR strategy, integration, devolvement and organizational policies about long-term recruitment targets, monitoring of training effectiveness and means of communications - in public and private higher education institutes (HEIs) of Pakistan. Results of the survey from fifty-two HEIs show that public and private sector institutes are similar in most of their patterns of HRM. The significant difference of age and size has made no impact at all on structure, strategy and other characteristics of HRM. The centralized structure inherited from colonial period is prevailing especially in the public owned institutes. The presence of elite classes created during colonial period is resisting to any change. Private sector has shown a tremendous growth. Individuals or group of individuals representing the elite classes owns most of the private institutes. Therefore, the private institutes are not much different from the public one. There is resistance to HRM convergence in Pakistan and the high power distance culture is shaping many HRM policies and practices.
Stability Evaluation of Slopes Using Kinematic and Limit Equilibrium Analyses in Seismically Active Balakot, KPK, Pakistan  [PDF]
Mian Sohail Akram, Muhammad Fahad Ullah, Faisal Rehman, Muhammad Ali, Luqman Ahmed, Assad Ali Gillani
Open Journal of Geology (OJG) , 2019, DOI: 10.4236/ojg.2019.911091
Abstract: The Northern segment of Pakistan, especially Balakot city is affected up to large extent by the landslides. Tectonically, it lies in the proximity of Hazara Kashmir Syntaxis and other two active regional faults: Main Boundary and Hazara Frontal Thrusts that traversing right through the Balakot town. This study focuses on the evaluation of slopes near Balakot town in static and pseudo-static condition. A geological map is produced at 1:24,000 scale to separate various rock and soil units. During reconnaissance study, two slopes were selected which seem prone to sliding. The procured data on condition of natural slope, properties of material entailed, structural setting, and vegetation cover distribution was gathered. Discontinuity Surveys of slopes were carried out to collect discontinuity parameters. Kinematic analyses were performed on DIPS v. 7.0 to assess mode of failures based on joints data. Limit equilibrium analyses were carried out at Slide v. 7.0 to check factor of safety at different conditions. The study concluded that the slopes were affected by the plane, wedge and toppling failures, while although in seismically active zone, circular failure is not likely.
Requirements Analysis: Evaluating KAOS Models  [PDF]
Faisal Almisned, Jeroen Keppens
Journal of Software Engineering and Applications (JSEA) , 2010, DOI: 10.4236/jsea.2010.39101
Abstract: Wigmore’s charts and Bayesian networks are used to represent graphically the construction of arguments and to evaluate them. KAOS is a goal oriented requirements analysis method that enables the analysts to capture requirements through the realization of the business goals. However, KAOS does not have inbuilt mechanism for evaluating these goals and the inferring process. This paper proposes a method for evaluating KAOS models through the extension of Wigmore’s model with features of Bayesian networks.
Moving From Traditional Software Engineering to Componentware  [PDF]
Faisal Nabi, Roisin Mullins
Journal of Software Engineering and Applications (JSEA) , 2011, DOI: 10.4236/jsea.2011.45031
Abstract: The field of software engineering and software technology is developing very fast. Perhaps as a consequence, there is seldom enough interest or opportunity for systematic investigation of how the underlying technology will actually perform. That is, we introduce new concepts, methods, techniques and tools – or change existing ones and emphasize their value. A major turn in software engineering leading to Componentware has dramatically changed the shape of software development and introduced interesting methods for the design and rapid development of systems which may provide cost-effective benefits. In this paper we will discuss Componentware, process model, architecture, principles and the drivers, advantages, disadvantage and reveal profound changes from the traditional software engineering approaches.
Interaction of Twin Circular Shallow Tunnels in Soils—Parametric Study  [PDF]
Faisal I. Shalabi
Open Journal of Civil Engineering (OJCE) , 2017, DOI: 10.4236/ojce.2017.71006
Abstract:
In big and crowded cities with limited urban areas, it is sometimes necessary to build twin tunnels to overcome transportation problems. In a city like Riyadh in Saudi Arabia, tunneling becomes very essential to solve effectively traffic conjunctions and associated problems. The city started to construct big tunneling projects and it is expected in the near future to start building twin tunnels. If the design and construction process of twin tunnels are not understood and considered, damage to the tunnel lining or excessive ground surface settlement may take place. In this study, the interaction between adjacent tunnels excavated through soils in Saudi Arabia has been investigated using FE analysis and the range of the encountered soil properties. The investigation considered the effect of spacing between the twin tunnels and ground conditions on tunnel behavior. The analysis focused on the effect of constructing twin tunnels on ground surface settlement, contact pressure between lining and ground, and change in tunnel diameter. Based on the results obtained, it was observed that as the compressibility ratio, c, and spacing between tunnels decreased, the interaction effect between tunnels increased. For compressibility ratio of 0.01, the excavation of the new tunnel caused an increase in the lining deformation of the old one in the range of 0.1% to 0.3%. Furthermore, the excavation of the new tunnel leads to an increase in the contact pressure at the crown of the old one by 7% - 9%. At the spring line level, the excavation of the new tunnel had almost no effect on the far side of the old one. On the other hand, and for low compressibility ratio, the new tunnel excavation significantly affected contact pressure at the near side of the old one. For an expected tunnel life of 100 years, the results show an increase in the normalized contact pressure at the crown of the old tunnel due to the excavation of the new one in the range of 2% - 7% for compressibility ratio ranging between 0.01 - 0.1, respectively.
Exposure of Soil Microbial Communities to Chromium and Arsenic Alters Their Diversity and Structure
Cody S. Sheik, Tyler W. Mitchell, Fariha Z. Rizvi, Yasir Rehman, Muhammad Faisal, Shahida Hasnain, Michael J. McInerney, Lee R. Krumholz
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0040059
Abstract: Extensive use of chromium (Cr) and arsenic (As) based preservatives from the leather tanning industry in Pakistan has had a deleterious effect on the soils surrounding production facilities. Bacteria have been shown to be an active component in the geochemical cycling of both Cr and As, but it is unknown how these compounds affect microbial community composition or the prevalence and form of metal resistance. Therefore, we sought to understand the effects that long-term exposure to As and Cr had on the diversity and structure of soil microbial communities. Soils from three spatially isolated tanning facilities in the Punjab province of Pakistan were analyzed. The structure, diversity and abundance of microbial 16S rRNA genes were highly influenced by the concentration and presence of hexavalent chromium (Cr (VI)) and arsenic. When compared to control soils, contaminated soils were dominated by Proteobacteria while Actinobacteria and Acidobacteria (which are generally abundant in pristine soils) were minor components of the bacterial community. Shifts in community composition were significant and revealed that Cr (VI)-containing soils were more similar to each other than to As contaminated soils lacking Cr (VI). Diversity of the arsenic resistance genes, arsB and ACR3 were also determined. Results showed that ACR3 becomes less diverse as arsenic concentrations increase with a single OTU dominating at the highest concentration. Chronic exposure to either Cr or As not only alters the composition of the soil bacterial community in general, but affects the arsenic resistant individuals in different ways.
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