Faiqa Rafiq - Academia.edu (original) (raw)

Papers by Faiqa Rafiq

Applied Ecology and Environmental Research

Increased pollution in the coastal areas may cause changes in the biodiversity of marine organism... more Increased pollution in the coastal areas may cause changes in the biodiversity of marine organisms depending upon their physiological capacity and resilience to thrive under stressing environmental conditions. The present research evaluates the heavy metals pollution degree of coastal waters using the macroalgae Ericaria selaginoides as bioindicator along the Atlantic coast of Morocco. Eight stations were chosen: two located near Eljadida city, three nearby Safi city and three around the city of Essaouira. Results showed that the heavy metal content in the thalli of E. selaginoides, in seawater and sediment varied seasonally. At the same time, it was negatively correlated with algal biodiversity onsite. However, the Chemical Oxygen Demand was significantly higher at the polluted station S5 than at other stations, while Dissolved Oxygen and Biological Oxygen Demand were lower. E. selaginoides accumulated metals in the following order Fe > Zn > Mn > Cu > Ni > Pb > Cr > Cd. In conclusion, E. selaginoides is overall more resilient to heavy metal pollution than other marine organisms in the Atlantic coast of Morocco, as indicated by substantially elevated concentrations of heavy metals in some sites. Our results support that E. selaginoides would be a suitable bioindicator for monitoring of heavy metals in polluted coastal areas.

2016 International Conference on Emerging Technologies (ICET), 2016

This paper presents the design of a transparent fuzzy bilateral controller for a nonlinear teleop... more This paper presents the design of a transparent fuzzy bilateral controller for a nonlinear teleoperation system which has been approximated by a class of Takagi-Sugeno (TS) fuzzy models. After the approximation stage, TS fuzzy control laws are introduced for the master and slave robotic systems. These laws further help in developing the design conditions using the state convergence methodology. The control gains are then found as a solution of these design conditions for achieving the bilateral teleoperation. MATLAB simulations on one degree-of-freedom (DoF) nonlinear teleoperation system validate the proposed fuzzy bilateral control scheme.

International Journal of Islamic and Middle Eastern Finance and Management, 2014

Purpose – The purpose of this paper is to assess the impact of zakat fund on the food expenditure... more Purpose – The purpose of this paper is to assess the impact of zakat fund on the food expenditure of the households to assess the impact of zakat fund on the agricultural production of the households and to assess the opinion of the zakat recipients on food security status under zakat program. Design/methodology/approach – Samples were selected for this study using the simple random sampling (SRS) technique. A total of 149 households were selected from 196 households. A survey was conducted during January to March 2011 among the project beneficiaries using questionnaire. The ordinary least squares technique was used to assess the impact of zakat on food security status of the zakat recipients. Heteroscedasticity problem was detected in this study which was corrected using White's method. Logit model was used to assess the opinions of the zakat recipients on their food security status under the Hasana project. Findings – This study shows that amount of zakat provided to the poor ...

2012 International Conference on Emerging Technologies, 2012

ABSTRACT This paper describes the design of a two loop fuzzy controller for goal directed navigat... more ABSTRACT This paper describes the design of a two loop fuzzy controller for goal directed navigation of a differentially driven mobile robot in unknown indoor environments. The first loop is responsible for finding a collision free path amongst obstacles while second loop uses this information to steer the mobile robot towards the target in absence of nearby obstacles. The fuzzy controller is designed and visualized with the help of Fuzzy Logic Toolbox in MATLAB environment where its membership functions and rules are tuned to have satisfactory real time results on an inexpensive test bed of two AT89C52 microcontrollers. The real time results obtained in indoor environment containing obstacles validate the proposed controller for goal directed navigation.

Eighth International Conference on Digital Information Management (ICDIM 2013), 2013

This paper describes the design and implementation of a neural network controller capable of prin... more This paper describes the design and implementation of a neural network controller capable of printing designs and drawings on paper using a Cartesian Plotter. The Cartesian plotter uses two dc motors with incremental encoders for motion along x and y-axis while third dc motor along z-axis controls the pen assembly for drawing the text and graphics data. The motion commands for the motors are generated with the help of a simple feed forward neural network controller trained with back propagation algorithm. The nine inputs, two output neural controller employs four neurons in the hidden layer with tangent sigmoid being activation function for hidden neurons while linear function is used for output neurons. The proposed neural controller can drive the pen assembly in one of the eight possible directions and thus produces similar results to the famous Bresenham's algorithm. Simulations and practical results validate the neural controller for use with Cartesian plotters.

Water Science and Technology, 1995

2013 International Conference on Open Source Systems and Technologies, 2013

ABSTRACT In this paper, a new scheme is proposed to determine the harmonic components of a single... more ABSTRACT In this paper, a new scheme is proposed to determine the harmonic components of a single-phase cycloconveter. The scheme computes the Fourier coefficients of the resultant positive and negative half cycle pairs of the output voltage waveform and adds them as one by the principle of superposition to determine the Fourier coefficients of the complete output voltage waveform. This scheme gives the straight computation of harmonic magnitude and angle without having to use Bessel functions, numerical techniques, and look-up tables. The scheme presented is a broad scheme that can be easily extended to the other types of the single-phase and three-phase ac-ac controllers including the on-off control and phase angle control. The presented method is theoretically proved using MATLAB and PSPICE software.

2016 Sixth International Conference on Innovative Computing Technology (INTECH), 2016

This paper presents the design and implementation of an hybrid automobile as a mobility assistive... more This paper presents the design and implementation of an hybrid automobile as a mobility assistive device for impaired people. The design of the vehicle is divided into three units namely mechanical, electrical and software design. The mechanical unit is concerned with the design of vehicle structure so that the vehicle can equally be used both for indoor as well as outdoor environments. The electrical part is related to the deployment of sensors and design of hardware circuits for powering the sensors and actuators. The software unit is responsible for providing the user with different navigation modes. The validity of the designed vehicle is proven through experimentation in different environments.

INMIC, 2013

ABSTRACT This paper proposes and implements an embedded wireless access control system using a co... more ABSTRACT This paper proposes and implements an embedded wireless access control system using a combination of RFID and MMS technologies. The RFID and MMS sections are each controlled by a cost effective AT89C52 microcontroller. The microcontroller in RFID section is responsible for reading the user tag information, searching the read information in a memory chip for a match and triggering the microcontroller in MMS section accordingly while the microcontroller in MMS section is responsible for issuing AT commands to Quectel M33 cellular engine for capturing the user image and transferring the image to owner mobile phone using MMS, a multimedia service of GSM network. A decision is finally made by the owner either to grant or deny access to the user by sending a text message to the access control system.

La tuberculose figure parmi les dix causes principales de mortalite a l’echelle mondiale et frapp... more La tuberculose figure parmi les dix causes principales de mortalite a l’echelle mondiale et frappe tout particulierement les pays a faible revenu. L’article qui suit examine, en passant en revue les publications sur le sujet, l’impact des mesures de lutte antituberculeuse sur la mortalite par tuberculose et la transmission de l’infection ainsi que les obstacles a la generalisation de ces mesures. Il donne egalement des estimations de l’efficacite de diverses interventions au moyen d’un modele propose par Styblo. Les auteurs concluent que le traitement de la tuberculose a frottis positif selon la strategie OMS de traitement de breve duree sous surveillance directe (DOTS) a, de loin, le meilleur impact. La vaccination par le BCG, si elle reduit la mortalite par tuberculose chez l’enfant, n’a probablement qu’une faible incidence sur la transmission de l’infection. Dans certaines circonstances, on peut attendre un impact supplementaire sur la mortalite et la transmission de mesures tell...

Earth and Planetary Science Letters, 1995

The concentrations of incompatible trace elements in ocean island basalts (OIB) from the central ... more The concentrations of incompatible trace elements in ocean island basalts (OIB) from the central Atlantic extend to relatively enriched and fractionated compositions in regions of older oceanic lithosphere. Certain trace element ratios normally considered to be uniform in the mantle, such as Ce/Pb, are particularly variable. However, other trace element ratios that are expected to be variable because of differences in bulk distribution coefficient, such as Cc/U, are relatively uniform. The Ce/Pb ratios in enriched OIB are correlated with unusually high U/PI, and low K/U. These U/Pb ratios would have generated excessively radiogenic Pb if they were long-term (lo9 yr) features of the source such as might result from core formation or recycling of h&rothermally altered ocean floor basalts. However, volcanic centers with high U/W do have high 206Pb/ 204Pb for their Pb/ 204Pb, a feature that is most easily modelled by enrichment in U relative to Pb about 10' yr prior to melting, a time similar to the age of the lithosphere. We propose that the source regions of these magmas are enriched by the introduction of small degree partial melts soon after the formation of the oceanic lithosphere. Metasomatism of the uppermost mantle by small degree partial melts produced in equilibrium with a combination of residual upper mantle major silicate phases, together with minor amphibole (5 2%), sulfide (< 0.2%) and phlogopite (< 0.2%) at about the time of formation of the lithosphere, would generate a 'near-surface fractionated'

Annals of King Edward Medical University, 2017

River plays an important role to agribusiness, industry, and the necessities of people and natura... more River plays an important role to agribusiness, industry, and the necessities of people and natural life. A great many individuals rely upon the river water for irrigation and fish cultivation. Karnaphuli River is the largest and major watercourse of the Chattogram region, Bangladesh. But day by day the river is losing its quality due to several anthropogenic reasons. Several studies have been done considering water quality and sediment quality of Karnaphuli River. But no research conducted specially on the basis of WQI. The main objective of this study is to assess the water quality of Karnaphuli River from Kalurghat to Patenga in terms of water quality index (WQI). For the determination of WQI, the weighted arithmetic method is used in this study. The water quality of River Karnaphuli was monitored for a period of 8 Months (January - August, 2018). After the completion of collection process, the water samples were assessed by analyzing the various physico-chemical parameters, such ...

This paper describes the design of a simple fuzzy logic liquid level controller. The proposed con... more This paper describes the design of a simple fuzzy logic liquid level controller. The proposed controller takes the liquid quantity as its input and generates appropriate flow rate on the output. The controller is tested on a cylindrical shaped tank with inlet and outlet valves. The liquid in the tank is sensed with the help of an ultrasonic sensor mounted above the tank. On entering the required liquid quantity with the help of keypad, fuzzy logic controller adjusts the valve opening and closing in order to supply the desired liquid amount. The performance of the controller is also compared with the proportional control and it is found that fuzzy logic controller is better choice owing to its smoothness and accuracy. The experimental setup can be used to teach various fuzzy inference systems in real time.

Oriental Journal of Chemistry

The Physicochemical characteristics of several kinds of toothpaste and natural powder samples and... more The Physicochemical characteristics of several kinds of toothpaste and natural powder samples and their antibacterial activity against Viridans streptococci bacteria have been studied in vitro. The Physicochemical analysis such as pH, conductivity, and moisture and fluoride concentration of the toothpaste and natural powder along with X-Ray Diffraction made in the consideration to indicating the quality of toothpaste and natural powder products. The results of the Physicochemical properties revealed the differences between toothpaste and natural powder samples. The toothpaste samples exhibited very good antibacterial activities against Viridans streptococci bacteria in comparison to the natural powder almost have no activity against bacteria

2016 19th International Multi-Topic Conference (INMIC), 2016

This paper presents the design of a fuzzy logic controller for a non-linear tele-robotic system w... more This paper presents the design of a fuzzy logic controller for a non-linear tele-robotic system where the slave's environment is unknown. First, the non-linear tele-robotic system is approximated by a class of Takagi-Sugeno (TS) fuzzy models. A fuzzy control law is then adopted to stabilize the tele-robotic system. Further, the selected control law allows deriving the design conditions for determining the bilateral control gains of the state convergence architecture which has been used in this study as a framework for establishing communication between the master and slave sides. MATLAB simulations on one-degree-of-freedom (DoF) non-linear tele-robotic system are included to prove the validity of the proposed fuzzy bilateral controller.

Advances in Communication Technology and Systems, 2014

International Journal of Islamic and Middle Eastern Finance and Management, Jul 1, 2014

Purpose - (i) to assess the impact of zakat fund on the food expenditure of the households (ii) t... more Purpose - (i) to assess the impact of zakat fund on the food expenditure of the households (ii) to assess the impact of zakat fund on the agricultural production of the households (iii) to assess the opinion of the zakat-recipients on food security status under zakat program Design/methodology/approach - Samples were selected for this study using simple random sampling (SRS) technique. A total of 149 households were selected from the 196 households. Survey was conducted during January to March 2011 among the project beneficiaries using questionnaire. OLS technique was used to assess the impact of zakat on food security status of the zakat- recipients. Heteroscedasticity problem was detected in this study which was corrected using white method. Logit model was used in order to assess the opinions of the zakat recipients on their food security status under Hasana project. Findings - This study shows that amount of zakat provided to the poor recipients failed to create any significant ...

Vacuum, 2006

We report the optimization of the design and performance of recently reported hairpin tungsten el... more We report the optimization of the design and performance of recently reported hairpin tungsten electron source as a cathode in diode type geometry of the gun. The temperature maximum has been shifted close to the crown of the source. Focusing of the beam has been achieved up to 1 mm in diameter with Gaussian profile of the beam at the target. The perveance and power density measured are 10 À5 A V À3/2 and 10 6 W cm À2 , respectively.