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With the developing technology, the power density of electronic devices is increasing in direct proportion. Therefore, this situation causes the development of cooling technology. This study presents a quantitative evaluation of how TRIZ (Innovative problem solving theory) method improves results in cooler design used in cooling the electronic systems of electric vehicles. After the problem was defined, innovative principles were applied with the TRIZ contradiction matrix. Geometric parameters are taken as a basis, especially in order not to be a costly solution. For an innovative solution, the effects of duct inlet length, number of fins and fin type parameters on cooling and pressure loss were investigated in Taguchi analysis. The results of the in-channel flow problem were carried out numerically in the Comsol program. The order of importance of the parameters affecting the radiated heat and pressure loss values for the cooling process was obtained as the number of fins > the effect of the cooler type > the inlet distance distance. It has been observed that the effect rate of the number of fins on the maximum heat dissipation and pressure loss is quite high (83.11%-87.27%) compared to the other two parameters. In terms of heat dissipation, with TRIZ analysis, an improvement of 6.6% was achieved in the final design compared to the current situation, and an improvement of 14.14% in terms of pressure loss. In order to validation the numerical method used in the study, a study in the literature was discussed. The results were found to be compatible with each other. [ABSTRACT FROM AUTHOR]

The aim of this study is to examine the use of smart ambulance and tablet (electronic case system) by pre-hospital emergency health workers with technology acceptance model. 275 emergency healthcare workers participated in the study carried out for this purpose. "Technology Acceptance Scale" consisting of 25 statements was used in the research. As a result of the research, it was determined that the technology acceptance level of emergency health workers was high. In the study, perceived ease of use; perceived usefulness and attitude towards use, perceived usefulness; It has been determined that it positively affects the attitude towards use and intention towards use. It has also been determined that the attitude towards use positively affects the intention towards use and the behavior realized during the intention towards use. In addition, it has been determined that perceived usefulness has a partial mediator role between perceived ease of use and attitude towards use, and attitude towards use has a partial mediating role between perceived usefulness and intention to use. Since there is no study on the subject in the literature, it is thought that it will make important contributions to the related literature and will be a reference study that practitioners can benefit from in system development processes. [ABSTRACT FROM AUTHOR]

In the era of developing technology, faster applications in modern electronic systems increase the demands for less energy consumption, area, power, and delay. This research paper presents various classes of parallel adders and hybrid parallel adders in academic studies. In this study, hybrid parallel collector performance criteria for the delay, area, energy, and power consumption of the proposed models were investigated comparatively. In addition, the performance results of the hybrid parallel adder tools investigated in this study regarding certain criteria are shared. According to the comparative results obtained, hybrid parallel adder circuits with less delay, area, power, and energy consumption can be designed. By looking at these results, it will be possible to make hybrid model selections by considering the data in terms of collectors of the processors to be designed for the areas to be studied. The comparative results are given in Table 1. which shows the results obtained by the researchers by conducting experiments. In this research on hybrid parallel adders, bits of all lengths were generally tried to be considered. According to the research on these parallel adders, the experimental results of hybrid parallel adders in terms of different delay, area, power, and energy are brought together and their comparative analyzes are given. [ABSTRACT FROM AUTHOR]

Communication, data collection and control processes are at the forefront of the most important areas of work in today's automotive industry. Data collection is very important for electronic infrastructure systems. It is very important to establish a highly reliable structure and to transmit the data correctly to the control system. CAN protocol is one of the frequently preferred communication protocols in order to transmit data accurately and securely along the line. In this study, the parameters of the CAN protocol used in airconditioning controls in accordance with the SAE J1939 standard are set with software. It is shown on the analyzer screen that the message address and information used in communication are transmitted correctly. It has been tried to create an electrical noisy environment that the air conditioning controls that control many electric motors and systems may encounter in the automotive during communication. Components and topologies of CAN hardware have been tested in the created environment. Output graphs of different circuit topologies in noisy environments are interpreted. Four different topologies are given. The oscilloscope images were shared by running the two topologies in an electrically noisy environment. 1.8 V peak-to-peak value was measured in the TVS protection circuit. In the multi-TVS device circuit, 1.6 V peak-to-peak value was obtained. By filtering, the peak-to-peak value was reduced by 12%. [ABSTRACT FROM AUTHOR]

In recent years, demand for electronic nose systems has increased and has taken its place among the fast techniques due to increasing interest in the studies for developing fast and economic techniques in determining the quality properties of foods. Electronic nose systems that mimic the human olfactory mechanism have gas sensors designed for different technologies in different types. Metal oxide semiconductor gas sensors (MOS) based on conductivity measurement from these gas sensors has found wide usage in medicine, chemistry, agriculture, and food sector due to its rapid response, cheapness, robustness, and portability. Food quality, shelf life, storage, microbial contamination, degradation, adulteration, and classification are among the studies carried out by means of electronic nose technology. The use of electronic nose metal oxide semiconductor gas sensors can be an alternative to existing food analyses and provide an opportunity to verify their results. In this review, it is aimed to summarize electronic nose metal oxide semiconductor sensors and especially scientific studies carried out by these sensors in food analyses. [ABSTRACT FROM AUTHOR]

Low Probability of Intercept (LPI Radar) is a class of radar with specific technical characteristics that make it very difficult to intercept with electronic support systems and radar warning receivers. Because of their properties as low power, variable frequency, wide bandwidth, LPI radar waveforms are difficult to intercept by ESM systems. In recent years, studies on the classification of waveforms used by these types of radar have been accelerated. In this study, Time-Frequency Images (TFI) has been obtained from the LPI radars waveforms by using Choi-Williams Distribution method. From these images, feature vectors have been generated using Gabor Wavelet transform. In contrast to many methods in the literature, waveform classification has been performed by directly comparing the feature vectors obtained without using any machine learning method. With the method we propose, classification accuracies were obtained at intervals of 2 dB between -20 dB and 10 dB and performed at reasonable classification accuracy rates up to -8 dB SNR value. Better results than the best reported in the literature were obtained for some signal types. The results obtained for all waveform types are given in comparison with the results of the existing methods in the literature. [ABSTRACT FROM AUTHOR]

Intensive care treatment needs and costs are expected to increase with the ageing population in our country and the world. Tele-intensive care unit (Tele-ICU) applications can provide an alternative solution to treat and follow up critical patients remotely. It can help use existing resources efficiently. With the Tele-ICU program, intensive care specialists will reach all intensive care beds in the country without restrictions. They will evaluate the patients’ situations with all data from electronic recording systems. However, problems with some legal regulations or terms of job descriptions, deterioration of patient-doctor, doctor-patient’s relative relationships, or some infrastructure deficiencies when using the Tele-ICU system could override the potential benefit of the new solution strategy. This review was written to inform about Tele-ICU, draw attention to opportunities, shortcomings, and limitations if Tele-ICU is applied in our country, and ensure that the necessary steps are taken to resolve these deficiencies. [ABSTRACT FROM AUTHOR]

Interpreting classical poems which is bearing the literary burden of different centuries is contributed to classical literature studies. For this reason, it has been developed an electronic system which collects the semantic word of classical poetry under the name of TEBDİZ (Contextual Index and Functional Dictionary of History and Literature Texts). Vardar Yeniceli Hayreti's the 16th century poet, divan published by Mehmet Çavuşoğlu and M. Ali Tanyeri as criticized text; the texts of the poems in the divan were also interpreted depending on the mentality of the period and the poet's sence of art. The words that (interpret) male sense of have been turned into contextual context thanks to TEBDİZ computer infrastructure. Finally, in this study, information about Hayretî's life and art in literature was interpreted in the context of the contextual index obtained from Hayretî Divan and it was aimed to reveal the literary personality of the poet. In this respect, the findings of this study in terms of context is contained many literary materials; his examinations and evaluations also contain original information as to Hayretî's art and style. [ABSTRACT FROM AUTHOR]

In this study, the effect of the switching frequency on the torque ripple of the switched reluctance motor (SRM) is investigated. The switching frequency is important parameter in the design of the systems. High switching frequency is an important factor for determining the performance of electromechanical or electronic systems. Namely, the electromechanical systems have both electrical and mechanical time constants. The switching frequency must be the high same rate with time constants for healthy and robust control in systems. The SRM is driven at different switching frequencies from 10kHz to 100kHz to see the effect of switching frequency on torque ripple. The effect of switching frequency of the SRM on torque ripple are performed with simulation studies at different speeds and it is seen that as the switching frequency increases, torque ripple decreases and torque ripple is nearly same after the specific switching frequency. [ABSTRACT FROM AUTHOR]

Objective: Reoperation is a risk factor that increases the postoperative mortality and morbidity in cardiac surgery. Our aim in this study is to investigate potential preoperative and intraoperative risk factors in patients operated for surgical and coagulopathy bleeding. Material and Method: Perioperative patient data were collected from hospital electronic system and patients' files. We included all cases of adult open heart surgery performed using cardiopulmonary bypass (CPB) except for cases of heart failure surgeries. Seventy-seven out of 1200 patients have undergone at least one operation within 24 h due to postoperative bleeding (6,4%). We classified the bleeding as surgical and coagulopathic. Hematoma without ongoing bleeding and/or oozing was defined as coagulopathic bleeding, and spesific bleeding requiring suture or clips was defined as surgical bleeding. Results: Complete data of 71 out of 77 patients were available. Surgical bleeding was detected in 28 (39.5%), and coagulopathic bleeding in 43 (60.5%) patients. When the variables that might be risk factors in terms of type of bleeding in preoperative and intraoperative period were examined, no related factors were found. Conclusion: Surgical bleeding was detected in 39.5% of the patients. The incidence of surgical bleeding has been found as 56.4% in other series in the literature. At our highly experienced heart center, surgical bleeding rate was lower than coagulopathic bleeding and it was not possible to distinguish the risk factors because of the small number of patients. [ABSTRACT FROM AUTHOR]

Main research areas of inverse scattering theory is the reconstructions of geometrical (location and shape) and / or physical (dielectric permittivity, conductivity, impedance etc.) properties of inaccessible obstacles from the knowledge of the scattered waves (electromagnetic, acoustic, elastic etc.) at large distance. Radar / sonar applications, medical tomography, geophysical exploration and non-destructive testing lead to this type of problems. Motivated by the applications researchers proposed different types of solution methods for the mentioned problems especially after the II. World War. Impedance boundary condition is used to simplify scattering problems involving complex structures. Such that in electromagnetics, imperfectly conducting scatterers, perfectly conducting objects with a penetrable or absorbing boundary layer can be modeled by an impedance boundary condition. In this context, one can study with a simpler model for complex typed structures. The aim of the direct scattering problem for an impedance cylinder is to obtain scattered near- or far-field data for given shape of the cylinder, the impedance function and the wave number of the background medium in the case of an electromagnetic wave illumination. However in the inverse problem case one recovers the impedance function defined on the cylinder from the knowledge of scattered field, shape of cylinder and wave number of the host medium. In this study, we considered an inverse scattering problem for arbitrarily shaped cylindrical objects that have inhomogeneous impedance boundaries and are buried in arbitrarily shaped cylindrical dielectrics. This consideration is realistic, since the problem will have many possible practical applications. For example, in the non-destructive testing of a coating on a wire; the coating is characterized by an inhomogeneous lossy cylinder layer and the conducting wire is modeled by an inhomogeneous surface impedance, or in biomedical applications; the bone of the arm can be modeled in terms of an impedance boundary condition while the muscular structure over it, can be considered as an inhomogeneous lossy cylindrical layer. For the sake of brevity we assume cylinders are infinitely long and illuminated by a TM polarized electromagnetic wave whose electric field vector is always parallel to x3 -axis. Due to the symmetry and homogeneity along the x3 -axis the total electric field vector will be polarized both inside and outside of the cylinder parallel to the x3 -axis. Then the problem is reduced to a scalar one in terms of total fields that have to satisfy homogeneous Helmholtz equation. In order to determine inhomogeneous impedance function we have to reconstruct the field occuring in the interior domain of the dielectric cylinder. Therefore since layer potentials are the solutions of homogeneous Helmholtz equation and they satisfy Sommerfeld radiation condition we use a potential approach to represent fields in every domain via single-layer potentials. Then the far-field expression can be obtained from the asymptotic representation of the scattered field. We note that one can use these representations under proper assumptions for the wave numbers. Roughly speaking, layer potentials are the integrals defined over the boundary of the scatterers which contain Hankel and density (source) functions. In our problem we define two density functions on the boundary of the exterior cylinder and one density function on the buried obstacle. Afterwards, one of the densities on the exterior cylinder can be reconstructed from the solution of an ill-posed far-field equation with measured far field pattern as a data via Tikhonov regularization. The rest two unknown densities are found from the integral equation system obtained by using dielectric (transmission)conditions which ensure the continuity of the fields and their normal derivatives across the boundary of the exterior cylinder. However the compactness of the operators in the system expresses its ill-posedness. Therefore to obtain a stable solution of the system for the densities we apply Tikhonov regularization. Now one can read off the values of the impedance function by substituting interior total field values to the standard impedance boundary condition using jump relations. However, the reconstruction of the impedance function will be sensitive to errors. In order to obtain stable reconstructions we express the unknown impedance function in terms of basis functions and apply least squares approximation. Furthermore, we test the applicability and the effectiveness of our inversion method with noisy data and obtain satisfactory numerical results as illustrated in the last section of the paper. [ABSTRACT FROM AUTHOR]

Inverse scattering problems for time harmonic waves are of fundamental importance in applications such as radar and sonar, nondestructive evaluation, geophysical exploration, medical imaging and others. In principle, in these applications the wave scattered by an unknown object is measured at a number of discrete locations and information such as shape parameters, location parameters and electromagnetic parameters of the scatterer are extracted from these data. In this study, a new second order Newton method for reconstructing the shape of a arbitrary cylindrical perfectly electrical conducting (PEC) scatterer from the measured far-field pattern for scattering of time harmonic plane waves is presented the first time in this thesis. This method extends a hybrid between regularized Newton iterations and decomposition methods. The main idea of our iterative method is to use Huygen's principle, i.e., represent the scattered field as a single-layer potential. Given an approximation for the boundary of the scatterer, this leads to an ill-posed integral equation of the first kind that is solved via Tikhonov regularization. Then, in a second order Taylor expansion, the PEC boundary condition is employed to update the boundary approximation. In an iterative procedure, these two steps are alternated until some stopping criterium is satisfied. Main advantages of method is that method does not need forward solver in each iteration step and needs less iteration than first order Newton method in order to obtain desired accuracy. Although there are a few results available on the convergence of regularized Newton iterations for in-verse obstacle scattering problems, this issue is not satisfactorily resolved. Despite the progress made with this espect, so far it has not been clarified whether the general results on the solution of ill-posed nonlinear equations in a Hilbert space setting are applicable to inverse obstacle scattering or, in general, to inverse boundary value problems in the frame work of solving the operator equation. This remark also implies to the convergence results of researches on the second order method with respect to its applicability for the inverse obstacle scattering problem. The more problem oriented approaches for a convergence analysis suffers from the restrictive assumption of a non vanishing normal derivative of the total field on the boundary in the case of exact data. Furthermore, in the analysis for noisy data, convergence for the noise level tending to zero, as usual, requires a stopping rule and with this particular rule the method has not yet been numerically implemented. D? These comments also apply to the case of the first order method of Kress and Serranho. At present only convergence results in the spirit of Potthast are available in literature. Therefore, we view it as legitimate to present our second order variant of this approach without a detailed convergence analysis and confine ourselves to some heuristic considerations. Of course, as in all of the iterative methods for the inverse obstacle scattering problem, the ill-posedness corrupts the high order convergence. Here, the ill-posedness enters through the integral equation of the first kind leading to inevitable errors occurring in its regularized solution. It is to be expected that a convergence analysis with respect to the noise level can be carried out analogous to the first order method. We refrain from working out the details since the result would be of a qualitative character only and would not lead to the possibility for a quantitative comparison on the convergence for the first and second order method. However, from the better convergence order for the exact data case one might expect some advantages in the numerical performance. Indeed, our numerical examples in the next section illustrate an improvement in the quality of the reconstructions and the speed of convergence connected with an increase in the stability with respect to noisy data. Proposed Newton reconstruction methods can be extended for reconstruction of perfectly electric conducting (PEC) objects located on known domain by using the fundamental solution of Helmholtz equation on known domain and its far field pattern and using the incident field as field in the absence of the PEC object. Fundamental solution of Helmoltz equation on known domain and Field in the absence of the PEC object are well known direct scattering problem. Proposed method can be easily extended for limited angular and near field measurements of scattered fields. Proposed method is described in detail and illustrated its feasibility through examples with exact and noisy data. [ABSTRACT FROM AUTHOR]

Nowadays DACs have become key elements in many electronic systems. In order to interface electronic systems with the real world, digital signals have to be translated into physical signals, which require a conversion into analog signals that is performed by DACs. Since data converters form the bridge between the analog and digital world their efficient implementation is highly desirable. The increase in demand for high speed (several 100 MHz) and high resolution (higher than 10-bit) DACs, especially in communication applications forces the use of current-steering based DACs. The current-steering DACs are widely used, since they satisfy the requirements of high-speed and high-resolution necessary in communication applications. However, due to their numerous features and wide range of application uses, it is very difficult to define and to follow a single way in which current-steering DACs can be specified and designed. A similar systematic design methodology can be considered during design flow of a predetermined current-steering DAC architecture. Such a methodology is concerned with the entire mixed signal system and requires a top-down design flow starting with DAC's specifications, architectural decisions, cell-level circuit decisions and ending with DAC layout issues both for digital and analog parts of the system. Most publications made use of the segmentation method for the design and the implementation of high performance current-steering DACs. Although this methodology is advantageous in most of the applications requiring high-speed and high-resolution, it suffers from the prolonged design time, complexity and high cost. Thus, the use of this methodology for some applications is not efficient concerning the time and the cost. To overcome these problems efficient methodologies for the high speed design of high-resolution DACs are considered. Behavioral modeling is necessary for the design of complex mixed-mode systems like current-steering DACs. Most of the models constructed (mathematical or circuit based) can not give a complete view of the system's behavior. For this reason, models that speed up the design and reflect accurately the behavior of the system prior to transistor level implementation are developed. The use of DAC modeling tool is helpful to obtain converters having the best performance in terms of speed and accuracy. Through these models (SPICE, Simulink etc. based models), the mixed signal designs even with large complexity can be easily evaluated. To conclude, the efficiency of the applied methodology and the accuracy of the behavioral model are validated through the implementation of a 12-bit hybrid current-steering based DAC in a relatively cheap 0.35μm CMOS process technology. The pro-posed hybrid DAC consists of four 3-bit parallel matched current-steering subDACs and resistive networks that properly weight the current output of each subDAC to obtain the overall voltage-mode output of the 12-bit hybrid DAC. The improvements in the building blocks and the different approaches used are reflected in the respective parts of the lay-out of the implemented DAC. Post-layout simulations are obtained using CADENCE Custom IC Design Tools and the performance characteristics of the DAC are investigated. The performance of the implemented DAC is compared with recently introduced DACs designed for different applications, through Figure of Merit (FoM). The architecture and design methodology used for the implementation of the DAC offer advantages like design speed up and a small active area. The performance of the hybrid DAC is validated through static and dynamic performance metrics. All simulations are performed with a 3.3V power supply. Simulations indicate that the DAC has an accuracy of 12-bit and a SFDR higher than 66 dB in whole Nyquist frequency band. The simulated INL is better than 1LSB, while simulated DNL is better than 0.25LSB. At an update rate of 200MSample/s the SFDR for signals up to 1MHz is higher than 70 dB. Similarly at an update rate of 100MS/s the SFDR is higher than 65 dB for signals up to 5 MHz. Even for update rates like 500MSample/s or 1GSample/s the SFDR is higher than 60dB for sinusoidal input signals up to 1MHz. The FoM of the implemented hybrid DAC is better than recently presented DACs with different resolutions and implemented using various process technologies. The proposed hybrid DAC supporting high update rates with good dynamic performance can be used as an alternative in various applications in industry including video, digital TV, cable modems etc. [ABSTRACT FROM AUTHOR]

The change occured in information and communication technologies has created a significant impact on libraries and information-documentation centers like any organizations. Transitions are taking place in paper-based systems toward electronic systems in the information services that libraries ofered. In the presence of large investments made, the adoption and use of these systems by faculty members are becoming increasingly important. In this study, it is intended to define the factors that affect instructors' adoption/use of electronic library services. To achieve this goal, Technology Acceptance Model (TAM) is used as a theoretical framework and some features in the extenden versions of the model are also considered. In the study individual differences such as innovativeness, self-efficacy and computer anxiety are examined within the context of TAM. The study was conducted with a sample of 426 academic staff working in Anadolu University. The structural equation modeling (SEM) technique was employed to explain the adoption process. The results proved that TAM to be a good theoretical tool to understand instructors' acceptance/use of electronic library services and also demonstrate the effects of individual differences (innovativeness, self-efficacy and computer anxiety) on usage intention through perceived ease of use and perceived usefulness. All of the individual differences have significant effects on perceived ease of use of electronic library services. In addition, innovativeness is a much broader concept, that has direct effects on attitude and usage intention. The research model explains 47% of the variance in the acceptance/use of electronic libraries by instructors. [ABSTRACT FROM AUTHOR]

In this study, control method of the electronic expansion valve in the refrigeration system was investigated. Electronic expansion valve whose mile drived with a 500 steps stepper motor, was used to control refrigerant flow. Fuzzy logic control algorithm was used for the valve control. Superheat degree of the liquid refrigerant at entrance into the scroll compressor has been controlled by electronic expansion valve controlled in the about 5 kW cooling capacity chiller. [ABSTRACT FROM AUTHOR]

In 1990s, a new software development approach named "agile", suggested new methodologies for projects of relatively short duration and changing requirements. Such software projects which start with uncertain requirements are considered risky under classical approaches, but they became fairly successful by using these newer methods. Agile methods favor working software to detailed documentation, they are open to change and they prefer strong interaction with customers. This study reports the results of a project development effort deriving its development process from different agile methods adapted for the circumstances. The project aims to develop a university automation system by a software team which was initially unfamiliar with the agile software development approach and internet based programming technologies. We describe how to tailor and implement the chosen practices from the different agile methods, which challenges were addressed during the implementation, and the ways to solve these challenges. Furthermore, we comment on the experience gained and make recommendations on the implementation of these practices. [ABSTRACT FROM AUTHOR]

In this paper, within the framework of the Act on the Right of Information Acquirement, an electronic application classification system has been developed in order to eliminate such problems as the waste of workforce and time during the classification of electronic applications to the institutions. The system first classifies the electronic applications to Erzincan University then forwards them to the relevant Chambers of Affairs. Artificial Neural Network based system, which considerably accelerates the flux of work and hinders the waste of workforce, is a word based and supervised learning system and it works with 98% accuracy. [ABSTRACT FROM AUTHOR]

A proper understanding about the force concept has a diagnostic significance on the work concept. Ability to distinguish negative work from positive work is related to a clear understanding of force as a vector quantity and the skaler product of vectors. Therefore, it is necessary to determine methods to reveal student beliefs on these subjects. Purpose of this study is to determine basic knowledge of students about the work concept using drawing method and compare misconception levels between written and drawn expressions. 200 students attending to Electronic-Computer and Mechatronics Education Departments in Technical Education Faculty of SDU are involved in this study. Students were asked to express by both writing and drawing what they knew about work done by the forces exerted on bodies in the event that they select from given 7 examples. This application has been an additional question to the fist 4 questions in the final examination to make them consider in an earnest way. From the results, drawing method has been found to be a complementary way of revealing basic comprehension levels and misconceptions. [ABSTRACT FROM AUTHOR]

In this study, influence on compressor working performance of unsaturated stream suction into scroll type cooling compressor was investigated experimentally. During the study, liquid refrigerant entrance into the scroll compressor was controlled by electronic expansion valve on the 5 kw cooling capacity chiller system. According to the saturation ratio of the refrigerant, the discharge temperature, power consumption and refrigerant capacity of the compressor were investigated experimentally. Additionally, mechanical influence of the unsaturated refrigerant entrance on the compressor and effect on the compressor oil was investigated. [ABSTRACT FROM AUTHOR]

In this work, emission probabilities of K X- and γ-rays following the decay of 226Ra and 241Am were precisely measured. An electronic device system connected to a Si(Li) semi-conductor detector is used for building spectra. Detector has 12 mm² of active area and 3 mm of thickness, and 160 eV of full with half maximum (FWHM) at 5.95 keV. The photopeak efficiency of the Si(Li) semiconductor detector was determined experimentally for about 2-450 keV energy range by using standard sources. Results of this study have been compared with the theoretical values and other available experimental results in the literature. Good agreement was observed between our results and other available experimental results and theoretically calculated values. [ABSTRACT FROM AUTHOR]

The aim of this study was to investigate the correlation between attitude and self efficacy with regard to computer assisted education. Sample of the study was 125 teacher candidates in Gazi University Education Faculty. Data of the study was collected with the help of attitude and self efficacy scale. At the end of study, it was found that self efficacy and attitude with regard to computer assisted education was very high. Also, there was moderate correlation between self efficacy and attitude with regard to computer assisted education. [ABSTRACT FROM AUTHOR]

In this paper, thermal analysis of high voltage (HV) power cable joint, which is well-known as the hottest point of underground cable route, is investigated using finite element method (FEM). For this purpose, a 154 kV cable and joint, which are installed in underground transmission system in Turkey by TEIAS according to IEC-60287 standard, are used in analyses by using ANSYS 5.6 finite element analysis software. The first aim of this paper is to determine temperature distribution of cable joint and to compare with the cable parts. The second aim of this study is to give fundamentals and boundary conditions to analyse the ampacity of an installed cable considering IEC-287 standard as a basis. This standard uses Neher-McGrath model, which uses a technique based on a simple model of energy balance in the conductor of the cable, and on an analogy between the flow of electric current and the flow of heat. Obtained results indicate that joint layers have a less heat dissipation characteristic than cable parts due to excessive volume. Therefore the joint insulation is exposed to more thermal stresses and its aging process is accelerated. [ABSTRACT FROM AUTHOR]

Document Management Systems covering all the document and information flow in an enterprise are built to decrease the costs and increase the productivity in the document related operations such as creating, controlling, preserving, accessing and archiving operations throughout the life cycle of the document. In this paper, after describing the properties, functionality and the benefits of the Document Management and Workflow systems, the modern trends in Management Information Systems, Library Management Systems and in Document Management Systems Software are explained, and their impact on the e-transformation processes of the enterprises are discussed. [ABSTRACT FROM AUTHOR]

The article discusses aspect-oriented programming (AOP) technologies aimed to improve software system's modularity. AOP aims to improve system modularity by modularizing crosscutting concerns which includes error handling or transaction code, interacting features and reliability and security. Using an AOP language, a developer can define an update signalling aspect, a module that expresses code that crosscuts the structure and functionality of a system. When needed aspects can be composed into the system. This modularization allows independent application of the UpdateSignalling aspect or implementing different updating strategies. Many AOP languages support selecting join points and modifying behavior at those join points from the aspect. Using this approach, the developer of code that will later be advised by the aspect can remain oblivious of crosscutting concerns. Aspect-oriented mechanisms were first developed for source code. The difficulties associated with nonmodularized crosscutting structure are not limited to implementation but also occur during requirements and design activities.

The increase of volume and variety of information, which in turn has an important role in health services, reached to an explosive bulk, that can hardly be managable for the users. In order to meet users' needs under these conditions, electronic health record systems were developed. Electronic health record systems integrated with electronic libraries allow clinicians, along with the patient information, also to access medical literature they would need for treatment. By comparing patient information with current information sources concerning relevant medical advances and thus performing evaluations being based on such comparisons help clinicians to save time and make fast and accurate decisions. On the other hand, the use of electronic health record systems require more active roles from medical libraries and their librarians within the framework of their parent organisation. [ABSTRACT FROM AUTHOR]

Extension in computer usage has lead to an increase in security needs. Areas with increase security concerns include electronic trade, especially payment and money transfer. In this study, the tools used in the payments made electronically are defined, and the security systems developed for payment transactions are examined. [ABSTRACT FROM AUTHOR]

There are many techniques to decrease radar cross section. One of those techniques, which is very useful and well-known, is using radar absorbing materials that minimizes the reflection coefficient. The most used radar absorbing materials are broad-band, multilayered and passive absorbing materials. Genetic algorithm is a widely used and effective global optimization method. It makes computations not with parameters themselves but with the codes of those parameters to solve optimization problems. It is based on natural selection, which is one of sub-stages of evolution. This study designs structures that minimize the reflection coefficient using continuous parameter genetic algorithm. [ABSTRACT FROM AUTHOR]