The purpose of this research is to determine the trust basis of the school managers of, the Ministry of Education, public primary school teachers. In the model Qualitative research, the open-ended survey question “If you were a school principal what would you do to have the confidence?” was used to collect as a data collection tool. The data was collected by the participation of 197 teachers from 15 primary school in Kocaeli. In the analysis of the data, beyond the types of content analysis, categorise analysis was used. As a result of research, 37 variables have been identified including, equality and fairness, impressive communication, participation in the profits, clarity, security, being relevant, cohesiveness, honesty, consistency, helpfulness, rewarding, empathy, being a model, organising social activity, expertise, integration, support, flexibility, motivation, value, making the physical environment, being respectful and tolerant, problem-solving, friendly, power distance, listening, tend to trust, kindness, confidentiality constructiveness ,compliance with obligations remote control, aim-oriented work, being disciplined , mediation, the accuracy and being criticism.
Temperature aware design can help alleviate the increasingly serious problems in sub-micron technologies. 3D circuits have the potential to improve performance over traditional 2D circuits by reducing wirelength and interconnect delay. One major problem with 3D circuits is that their higher device density due to reduced footprint area leads to greater temperatures. This paper aims at minimizing the maximum temperature of the chip using Thermal aware floorplanning. Using placement of blocks in a chip, temperature aware floorplanning is able to greatly improve the temperature distribution. Hotspot, the practical tool to model thermal behavior in architectural-level power and performance simulator is used for temperature aware floorplanning. Thermal aware floorplanning makes use of the Simulated Annealing algorithm that is used to reach a globally optimal solution no matter where the initial solution starts. This algorithm is applied to the MCNC benchmark circuits and the reduction in average and peak temperature is noted. \nKeywords: VLSI Floorplanning, Hotspot, Simulated Annealing
This paper presents a technique for designing a low write power and variability-aware 13-transistor (13T) SRAM cell. The cell achieves low write power dissipation due to reduction of activity factor and breakage of feedback path in the cross-coupled inverter during write operation. It also achieves higher read static noise margin (RSNM) at the expense of 49.5% decrease in write static noise margin (WSNM) compared with standard 6T SRAM cell. The paper studies the impact of process, voltage, and temperature variations on read delay and compares the results with standard 6T SRAM cell. The proposed 13T exhibits narrower spread in read delay at all considered VDD. In particular, it shows 27% tighter spread in read delay distribution compared with standard 6T SRAM cell at nominal VDD at the expense of 76% higher read delay. It shows its robustness by exhibiting narrower spread in read delay.
The purpose of this study is to adapt a well-known self-efficacy scale and determine engineering student’s C++ computer programming self-efficacy levels. The sample group consists of 378 engineering students. In order to test the validity of the scale, an exploratory factor analysis has been conducted and item discriminative power has been evaluated. The reliability of the scale, on the other hand, has been justified using the internal consistency level. The results indicate that the scale is reliable and valid, and it can be used to measure the self-efficacy of the engineering student in Turkish cultural environment. Furthermore, it is revealed that the level of self-efficacy perception of the students is middling and it does not show any meaningful difference between genders. On the other hand, self-efficacy perception of students in computer engineering is found to be higher than that of the students in electrical-electronics engineering.
In this correspondence, we mainly study the asymptotic equipartition property (AEP) for finite nonhomogeneous Markov chains. Through improving the original condition, we obtain the asymptotic equipartition property (AEP) on the frequencies of occurrence of states and ordered couples of states, entropy density, and average random conditional entropy for finite nonhomogeneous Markov chains. The result in this correspondence generalizes the former result.
Conditions of existing bridges are often problematic issues for many countries. The combination of a variety of local factors that cause deterioration raises the needs for local survey for bridges. Concrete bridges in Albania had been constructed with different standards in different periods and exposed traffic loads which have rapidly increased the last two decades. Despite the fact that existing condition of these bridges has not been clearly defined. Therefore an attempt was made on this study to draw a general picture of Albanian’s reinforced concrete bridges. The results can generally be applied to the bridges in other countries, because most distresses are common. The condition of Albanian bridges was presented in this paper based on visual inspection of 104 bridges which cover the total length of 7271.6 m along 263 km road from different parts of the country, concentrating on local causes of deteriorations. The main causes of the defects are figured out in the study as traffic load, natural force, aging, lack of maintenance and last but not least construction and design deficiencies. Study concludes that general physical states of the bridges are poor, therefore, the services provided by the bridges are in potential hazards.
Various studies have been conducted which aimed to measure the knowledge, experience, attitude and behaviors regarding multicultural education. However, no study has focused on finding the level of effect the fear of positive and negative evaluation and democratic tendency have on multicultural education and their explaining ratio. The level of correlation and the effect of the fear of positive and negative evaluations, democratic tendency and the attitude towards multicultural education with each other and explaining ratios of each other have been tested in this research. For this, six hypotheses were developed in light of theoretical information by reviewing the literature. This research is done by using the fear of positive and negative evaluation scales, democratic tendency scale and scale of attitudes toward multicultural education. The participant group of the research consists of 611 pre-service teachers. Exploratory factor analyses of scales were analyzed via SPSS 16.0 software. For the confirmatory factor analyses of scales and the structural equation modeling, AMOS 17.0 software was used. The most significant finding of this study is that the fear of positive evaluation, the fear of negative evaluation and democratic tendency are important predictors of the attitudes of teacher candidates towards multicultural education.
Main problems faced in direct torque control method are difficulties due to complex algorithm and high torque ripple in order to get high performance control for induction motors. The purpose of this paper is to simplify the control structure by using artificial neural networks and to investigate the effects of this structure on motor performance. For this purpose, two different artificial neural networks have been suggested to replace the optimal switching vector selection and flux sector determination processes of classical direct torque control method. Experimental works have been carried out to compare motor performances with classical control structure and proposed artificial neural network based structure. It has been observed that the dynamic response of motor is faster and torque ripple and the controller complexity of the conventional control system has been reduced with the proposed technique.
In order to acquire differences of morphology characterizations of rock fracture surfaces under different loading ways and reach the purpose that rock damage mechanisms will be inferred by morphology\ntheory,every corresponding statistic differences of orientation angles of normal vectors of center profile\non rock fracture surfaces are analysed by statistical method and a new concept,which is called Deviation\nNormal Distribution Coefficient of normal vectors of central profile on rock fracture surfaces coefficient(\nabbreviation:DNDC),is defined through Kurtosis.The DNDC of center profile on fracture surface of Brazilian disc is calculated by computer procedure and the regularity that the DNDC changes with variety of scales can distinguish a kind of topography characterization form another of center profiles on rock fracture surfaces under various loading conditions.The conclusion is presented by the following three aspects.Firstly,the DNDC depends on scale effecting.Secondly,as Brazilian disc is loaded to two-thirds of threshold of fracture strength,the inner of the Brazilian disc has been damaged to some extent.Finally,the variability of the DNDC has uncertainty to do with loading speeds set in the series experiments of the paper.
In this paper, a new Evolution Strategy method for solving matrix’s eigenvalues and eigenvectors was proposed. Any real matrix’s eigenvalues and eigenvectors can be solved by this method. Several experimental results show that the proposed Evolution Strategy method is more efficient and feasible in solving the matrix’s eigenvalues and eigenvectors of arbitrary matrix than the tradition method. It was found that the accuracy is ten times higher than the old method and the speed convergent quickly.
In this paper, investigates and analysis the performance of the novel pulse width modulation techniques which uses stepped carrier waveform, unipolar sine carrier waveform and staircase carrier waveforms are proposed for three-level and five-level cascaded inverter. In each carrier waveform, different techniques such as phase disposition (PD), inverted phase disposition (IPD), phase opposition disposition (POD) and alternative phase opposition disposition (APOD) are implemented. The fundamental output voltage and harmonics obtained in each method are compared with the output waveform obtained with the triangular carrier waveform. The different PWM methodologies adopting the constant switching frequency multicarrier with different modulation indexes are simulated for a 1KW, 3φ cascaded multilevel inverter using MATLAB/SIMULINK and the effect of switching frequency on the fundamental output voltage and harmonics are also analyzed. The proposed switching technique enhances the fundamental component of the output voltage and reduces the total harmonic distortion. The results are also verified by constructing an experimental prototype 1KW, 80V, single phase five-level cascaded inverter and implementing the different multicarrier PWM techniques in it.
Recent advances in artificial intelligent controller seems to be a more attractive to provide the fundamental driving force in many applications especially in areas of real-time manipulator control. In this paper, 6-DOF elbow manipulator controller using Direct Model Reference Adaptive Control (DMRAC) based hybrid Adaptive Neuro-Fuzzy Inference System (ANFIS) controller was proposed. Firstly, the theory of spherical-wristed 6-DOF mathematical modeling including the kinematic, dynamic solutions, different forces using different Jacobins is briefly formulated. Secondly, the ANFIS controller was hybrid with a classical controller to minimization the manipulator’s trajectory overshoot and the effect of settling time movement. Thirdly, the Virtual Reality Modeling Language (VRML) used in the whole manipulator-controller system and 3D display model simulated with MATLAB software Toolbox. Finally, based on performance of proposed method the simulation and on-line testing results show that the hybrid controller’s capacity of both precision and speed are improved compared with classical controllers.
Problem Statement: Communication is a process to associate and make sense of meanings, to generate information. Empathy is to understand one’s emotions and thoughts truly by placing self in one’s position. The reason why a relationship between communication and empathy exists is that empathy is affected by the nature of communication. \nPropose of Study: In this study, levels of the empathetic tendency and communication skills of school directors are tried to be determined, the relation between empathetic tendencies and communication skills is described. \nMethods: The samples of this research are school directors working central district of Sivas. Statistical processes are realized with 153 school directors in these schools. In the analysis of research data, among descriptive statistics methods, Mann Whitney U, Kruskal Wallis and Spearman’s Correlational Test and Regression analysis are performed.\nFindings: According to the findings of research, considering the relationship between communication skills and empathetic tendencies of school directors, [r=,551 p> .01] a medium level positive relation is seen. Director’s communication skills are precursors of empathetic tendency (R=0,551, R²=0,304, p<.00). Director’s communication skills describe nearly 0 of empathetic tendency. \nConclusions and Recommendations: \nBetween school directors’ communication skills and empathetic tendencies, a medium level and positive relation is seen. Communication skill is a variable predicting empathetic tendency. According to this, communication skills explain % 30 of empathetic tendencies
The theorizing and investigation of the money laundering activities represent a preoccupation that is insufficiently well documented in the Romanian specialized literature and practice. Taking advantage of this fact, the large global crime networks used and still use Romania in their extended processes of turning money originating from organized crime activities into legitimate incomes. This article aims at developing an analysis basis of the money laundering phenomenon and to analyze a case circumscribed to this problematic by means of the knowledge elements determined in the literature and the knowledge base in the field.
Amman, the capital of Jordan, shares the third world phenomenon of urban growth characterized by spontaneous settlements. Jordan’s migrants, however, include refugees from the 1948 and 1967 conflicts in official and unofficial camps as well as rural-urban migrants and former nomads drawn to the capital. The mixture of settlements resulting is made up of one-quarter of the houses in Amman containing half of the total population.\nThe poorest of these settlements are illegal, either because they have no land title, or because the structure is unauthorized or they are outside the control of the authorities and therefor receive no services. The houses have been built largely by squatters themselves, their illegality cannot be resolved and enforce their impermanence.\n\nThe approach for treatment is to improve conditions by introducing technology to construction, and improve design. Architects are more concerned with the values of the response over the last ten years shows the need for a different approach.\nWe believe that housing the urban poor can only be considered through the people’s experience, and by taking a total view of people’s relationship to their environment, and their social, culture, and economic developments.\n\nThe study investigates the effect of cultural influences of the informal settlements, especially the refugee camps, upon the identity of Amman city, and how these settlements evolve from temporary squatter houses to contemporary homes. It fellows the evolution of camps’ migrants through recording the statistical information and analyzing a case study for one of migrant\'s settlements, East-Whdat camp, in Jordan\'s capital, Amman.\n\nThis contained the hypothesis that housing is an environmental issue related to the society in a human scale of settlement in which the community can control its environment, develop its housing conditions, and evaluate its needs.
The aim of this study is to simulate and implement open loop and closed loop controlled DC-DC converter for stand-alone wind energy system. Wind turbines, however, are not always very efficient in the wind speeds that are most common to a region. Typically, wind energy systems are designed to be highly efficient in high wind speed and have a cut-off wind speed- below which no energy is captured. In remote locations where wind energy is used for battery charging, the energy lost below the cut-off wind speed could be used for trickle charging or maintaining a battery’s fully charged state. Wind turbines are most efficient when they are operated at one specific Tip-Speed to Wind-Speed Ratio (TSR). Therefore, for the efficient capture of wind power, turbine speed should be controlled to follow the ideal TSR, with an optimal operating point, which is different for every wind speed In this system, the DC-DC converter in the DC link with a constant dc voltage to the load, a DC-DC converter will allow the voltage at the output of a diode bridge rectifier to be controlled. In low wind speed conditions, the voltage may be lowered to prevent the dc link from reverse biasing the diode rectifier. Under high wind speed condition, the voltage may be increased, reducing I2R losses. In addition, adjusting the voltage on the dc rectifier will change the generator terminal voltage and thereby provide control over the current flowing out of the generator. The LCL-T resonant inverter system for both open loop and closed loop DC-to-DC converter systems are simulated using MAT LAB simulink power system blocks. This converter has advantages like reduced transformer size, reduced filter size and current source characteristics. The simulation studies indicate that LCL-T type for open and closed loop DC-DC converter can be used with stand-alone wind generator. Constant voltage can be maintained at the output of DC-to-DC converter by using a PWM rectifier at the output. Embedded controlled DC to DC converter is fabricated and it is tested.\n\nKEYWORDS: Converter, Resonant Inverter, DC-DC Converter, MAT LAB.
The objective of this work is the analysis of the effect of contact force due to an impact on a Glass/Polyester composite plate evolved in hygrothermal environment. Experimental data obtained from impact tests have been used in Modde V 5.0 software. Two factors are taken into consideration: the absorbed mass of water by the material and the drop height of the projectile and their effects on the contact force. The results show that the contact force is reduced for aged plates. The most influencing parameter is the drop height of the projectile. A mathematical model is established which governs the contact force in the domain studied.
In this study, the relationships between otolith dimensions-total fish length of 110 alburnus heckeli (Battalgil,1943) (Cyprinidae) specimens from Lake Hazar were examined. Total length and weight of specimens have been ranged 8.8-11.0 cm; 4.4-13.80 g respectively. The length, breadth and weight of otoliths were measured from each specimen and were determined 1.48-2.86 mm, 1.02-2.43 mm and 0.0005-0.002 g respectively. There were a strong relationships between the otolith lengths and total length obtained.
The main objective of this research is to determine how far motivation plays a role on students’ interest in learning. This research aims to (1) identify the correlation between motivation approach (Intrinsic and Extrinsic) and students’ learning interest, and (2) determine which motivational approach (Intrinsic and Extrinsic) plays a more significant role in influencing students’ learning interest. This research utilizes the ‘causal-comparative’ to study the main independent variable, motivational approach, and possible its effects towards the dependent variable, interest in learning. The instrument used in this research is from Maehr’s (Maehr, 1984) for measuring interest while the motivation items are based on Stipek (1993). The survey consists of three parts namely socio-demographic, respondents’ response towards learning interest and their perceptions towards motivational approach. Data is gathered from 110 form 5 students in one of the high school in Alor Setar, Kedah, Malaysia through random sampling. For statistical analysis, Pearson Correlation Test and Linear Multiple Regression Analysis are used. The result shows that there is a correlation between interest in learning and motivation either intrinsic or extrinsic. Pearson correlation test between Extrinsic Motivation and interest in learning manifest a medium relation with value r=.41 (p=.00<.05), and so does Intrinsic Motivation but with a higher correlation value r=0.59 (p=.00<.05). The result of Double Regression analysis shows that both Extrinsic and Intrinsic motivation managed to influence learning interest with the R square of 0.39. Intrinsic motivation is found to have the higher influence (Beta=.40) towards learning interest, this is followed with Extrinsic motivation (Beta=.20) with each significant value of p=.00 and p=.01 respectively.
Implant loosening is one of the most important modes of failure of cemented total hip replacement. It may be related to the cement strength, cement/prosthesis and cement/bone interfaces. Interfacial porosity and within the cement arises from its shrinkage during curing and presents as pores randomly located along the stem. Cracks emanating from porosities existing within the cement mantle (polymethylmethacrylate) and between interfaces (cement/implant and cement/bone) have been identified, to investigate the mechanical consequences of crack emanating from microcavities effect. Two dimensional finite element analysis model was created in order to determines the most dangerous zone or positions in the cement of femoral stem. The stress intensity factors KI and KII were calculated in the crack front within the cement for different inclination angle along cavity contour, in order to evaluate the crack risk in the different zones and positions in a cemented hip prosthesis. The presence of crack initiated from microcavity in distal zone presents the more significant risk for the stem loosening; especially when the crack is interfacial, where the shearing mode dominated.
The paper presents an in-depth study of route establishment and effect of change in topology on the performance in Adhoc On-Demand Distance Vector Routing protocol (AODV). Addressing of mobile nodes, method of the route establishment and route maintenance using RREQ, RREP and RERR control packets is given special consideration. This paper highlights the important issues of AODV from research point of view. The paper analyzes the performance of AODV with the help of simulation under small, medium and large scale networks. For the purpose of simulation, 20 node (small scale), 50, 100 nodes (medium scale) and 500 node (large scale) ad hoc network is considered. The paper analyzes the throughput vs. simulation time for sending packet, End-to-End delay and packet size for different simulation models. The results present an experimental\nproof for determining the type of network for which AODV performs best. The effect of density of intermediate nodes on throughput is also considered. The work also includes the effect of response time delay, due to link failure, on throughput where the link failure may be due to some technical problem or due to movement of nodes.
In This paper a design of experiments DOE is used to investigate and explain the damage mechanisms with their parameters interaction for turbine blade wear due to high temperature that results during the operating service conditions.\nUsing DOE modeling of these mechanisms allow determining the optimal values of the parameters for higher efficiency and good overall performance as well as to avoid the wear mechanisms.\nKeywords: Wear, design of experiment, modeling, response surface.
In recent years, a noticeable increase in the population of puffer fish in the Northeastern Mediterranean has been reported by the fishermen in the region. But there are no any studies on these fishes in term of fisheries management. This study is to determine the length-weight relationships of Lagocephalus sceleratus and Lagocephalus spadiceus captured by commercial bottom trawlers using purse seine nets at 24 and 50meter depths and gill nets at depths approximately 8 to 20 meters in the northeastern Mediterranean Sea. The exponent b values were 2.6733 for male and 2.7183 for female of L. spadiceus, and 2.6446 for male and 2.915 for female of L. sceleratus. The types of growth for both sexes was negative allometric growth for L. spadiceus, but an indicated isometric growth for females and negative allometric growth for males of L. sceleratus. This study also provides a maximum total length of 37.4 cm for L. spadiceus.
In this paper we describe a control cycle architecture where the reestablishment of the supervised plan is (partially) automated by means of two levels of control. Particularly, we suggest a distributed architecture where each supervisor agent i has in charge a local control loop across the accomplishment of the sub-plan attached to the executor . Once agent i discovers the failure of the operation executed by , agent i calls a Local Re-Plan in order to recovery from the failure by constructing a new sub-plan for the executor . If such a local recovery plan does not exist, a global control loop is initiated by invoking a Global Re-Planner, which has to determine (if possible) a new global plan which reaches the same goals of the original one. In this architecture the role of the user is minimized because the recovery plan synthesis is partially automated.
This paper presents Maximum Power Point Control for variable speed Wind turbine driven permanent-magnet generator. The wind turbine generator is operated such that the rotor speed varies according to wind speed to adjust the duty cycle of power converter and maximizes Wind Energy Conversion System (WECS) efficiency. The maximum power point for each speed value is traced using Maximum Power Point Tracking (MPPT) Algorithm. The rotating speed of permanent-magnet generator should be adjusted in the real time to capture maximum wind power. Electric power generation using non-conventional sources is receiving considerable attention throughout the world. Wind energy, which is a clean energy source and an infinite natural resource, is one of the available non-conventional energy sources. Various wind turbine concepts such as fixed speed wind turbine using a multi-stage gearbox, variable speed wind turbine system using a multi-stage gearbox and variable speed wind turbine, but it is a gearless wind turbine system with a direct-drive generator A quite simple maximum power point tracking (MPPT) control scheme is used for a wind turbine Permanent Magnet Synchronous Generator system with a diode bridge rectifier. The output dc power is controlled by additional grid side inverter. Thus the grid side converter which let the full controllability of DC link voltage and reactive power delivered to the grid. The system consists of a variable speed wind turbine coupled to a permanent magnet synchronous generator through a gear box. Output power from PMSG is first converted into dc and then it is fed to the grid. Both the power conversions are performed at unity power factor and the de link voltage is maintained constant. The MPPT extracts optimum power from the wind turbine from cut-in to rated wind velocity by sensing only the turbine output power. The main thrust in Wind Energy Conversion System (WECS) is to produce maximum power and maintain a constant voltage at the output in spite of variation in wind velocity. Modeling and simulation of the grid side of the wind turbine system are performed. Results are verified through the MATLAB simulations.
Stainless steels type 304 has widespread applications with excellent corrosion resistance to atmospheric environments. Therefore, a number of surface treatment technologies have been developed to further improve the localized corrosion resistance such as anodizing treatments. Anodizing process requires preparation of the surface, one of the most important finishing processes is electropolishing. This paper introduces a new experimental study of anodizing process for steel type 304. The effect of different variables (positive current density of 0.1-0.2 A/cm2, negative current density 0.011-0.066 A/cm2, nitric acid concentration 6 - 35 Vol. %., Sulfuric acid concentration 4-20 Vol. %., and time of exposure 5-15 mins. and temperature of electrolyte 5 - 50 oC.) were investigated. Finally, the experimental result found that the best conditions of anodizing are (positive cycle (0.1 A/cm2), negative cycle (0.03 A/cm2), 17% by vol. nitric acid and 8% by vol. sulfuric acid, temperature of (10oC), and time of (10 mins.).
RF feedback compensation can be implemented as a distortion reduction technique against any linear and nonlinear error or noise by internal reflected amplifier characteristics. In this paper, improving power amplifier linearity and output power using combination of Particle Swarm Optimization (PSO) and intelligent feed-forward method for WLAN applications was proposed. A brief description of mathematical model is developed for such a system. The effectiveness of the feedback controller has been verified using Matlab 10A software under a variety of conditions. The overall amplifier circuit delivers a power-added efficiency (PAE) of 42.6% is measured at 32.1dBm output power with distortion improvement based on maximum feedback gain 7dB. In addition, simulation result of amplifier linearity displays the 1dB compression output power of 17.5dBm at -22.4dBm input power. Finally, the proposed PA Feed-forward shows good and acceptable result for the WLAN system.
This paper presents the implementation of a fault tolerant control strategy for an induction motor using the discrete wavelet transform. Space vector modulation to control a three-phase voltage-source inverter was used. The healthy induction motor was operated with closed loop V/f. A switching mechanism based on wavelet indices reconfigures the system to open loop V/f control in the event of open and short circuit faults in the stator winding. A minimum level of motor performance was thus maintained despite the occurrence of faults
In this paper we investigate the joint power and bandwidth allocation in a random access wireless orthogonal frequency division multiple access (OFDMA) communication system with multiple source and multiple destination nodes based on time variant and invariant channel knowledge. The multiple sources in the system each transmits information to multiple destinations at a fixed signal to noise ratio (SNR) target and cooperates via an orthogonal regenerative decode and forwarding protocol with different frequency slots. We develop a framework for bandwidth and power allocation in this scenario around the concept of OFDMA and derive the expressions for the transmit power and bandwidth allocated to each source to achieve their SNR targets as a function of the cooperation ratio between sources. As the cooperation ratio increases between transmit-receive node the channel gain and feedback increases and more information is exchanged between TR nodes. The cooperation ratio solves the problem of optimally allocating the total power and Bandwidth of each T-R nodes between the transmissions it is assisting based on time variant and time invariant channel knowledge. We also investigate the SNR of TR nodes at the destination under the assumption that the destination optimally combines the observations at the receiver node side to maximize SNR. We investigate the effect of noise when all sources transmit with equal frequency allocation and the impact of orthogonal frequency division among the sources.
EEG signals resulted from the recording of brain activity using a specific configuration of the electrodes on the scalp. Several studies on the effect of electrodes configuration have been carried out on the entire surface of the scalp in a symmetrical and uniform manner. In this paper, authors suggest a new configuration carried out on each separate lobe of the brain: the frontal lobe, the occipital lobe, the parietal lobe and the temporal lobe based on a priori information on the pathologic zone provided by specialists. Various generalized inverse problem methods have been developed in order to localize the cortical generators in the brain. To validate our configuration, SSLOFO, a combination of sLORETA and FOCUSS, has been used, given its efficiency in localizing the cortical generators. The four experiments carried out on each lobe have shown similar results to the 128-Standard electrodes configuration, using a smaller number of electrodes for each experiment. These findings are beneficial in many ways, especially on time of algorithm processing and electrodes placement. This study can also confirm clinical results and minimize the postoperative neurological sequel by limiting the zone of surgical excision.
In this paper, an extended F-expansion method with a computerized symbolic computation is used for constructing the new exact traveling wave solutions of the steady two-dimensional laminar forced magneto hydrodynamic MHD Hiemenz flow against a flat plat with variable wall temperature in a porous medium. As a results, many exact traveling wave solutions are obtained which include solitary, periodic and rational solutions. It is shown that the extended F-expansion method, with the help of symbolic computation, provides a powerful mathematical tool for solving high-dimensional nonlinear evolution equations in mathematical physics. \nThe applied method will be used in further works to establish more entirely new solutions for other kinds of nonlinear evolution equations arising in physics.
Materials fatigue is a particularly serious and unsafe kind of material destruction. Investigations of the fatigue crack growth rate and fatigue life constitute very important and complex problems in mechanics. The understanding of the cracking mechanisms taking into account various factors such as the load pattern, the strain rate, the stress ratio, etc., is of a first need. In this work an energy approach of the fatigue crack growth (FCG) was proposed. This approach is based on the numerical determination of the plastic zone by introducing a novel form of the plastic radius. The experimental results conducted on two aluminum alloys of the type 2024-T351 and 7075-T7351 were exploited to validate the developed numerical model. A good agreement has been found between the two types of results.
In this paper, an extended tanh method with a computerized symbolic computation MAPLE is used for constructing the new exact traveling wave solutions of the steady two-dimensional laminar forced magnetohydrodynamic MHD Hiemenz flow against a flat plate with variable wall temperature in a porous medium.as a results,many exact travelling wave solutions are obtained. The applied method will be used in further works to establish more entirely new solutions for other kinds of nonlinear evolution equations arising in physics.
