A. Sanayei; M. S. Torkestani; P. Ahadi
Volume 7, Issue 1 , July 2009, , Pages 91-105
Abstract
This paper attempts to develop a method for readiness assessment of potential electronic commerce (e-commerce) success of Iran’s insurance industry. This method can expand in other industries. Key factors impacting e-commerce are identified from Wells, D. and Thomann, j. (2006) researches. This ...
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This paper attempts to develop a method for readiness assessment of potential electronic commerce (e-commerce) success of Iran’s insurance industry. This method can expand in other industries. Key factors impacting e-commerce are identified from Wells, D. and Thomann, j. (2006) researches. This model is a two-dimension 3*4 matrix. Each dimension consists of variables that influence on insurance industries readiness. These variables on horizontal dimension are: People Readiness, IT Readiness, and Business Readiness and on vertical dimension are: Business Imperative, Executive Sponsorship, Development Method and Business Process Orientation. Each cells of this matrix evaluated by 5 questions. This research’s data are collected via a 60-questions questionnaire-based survey from Iranian insurance companies. At the end of the research, the Iranian insurance companies were strongly recommended by us to invest on e-commerce and e-insurance area.
H. Sajady; M. Dastgir; H. Hashem Nejad
Volume 6, Issue 2 , July 2008, , Pages 49-59
Abstract
In this study the effectiveness of accounting information systems of finance managers of listed companies at Tehran Stock Exchange is evaluated. The results indicate that implementation of accounting information systems at these companies caused the improvement of managers’ decision-making process, ...
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In this study the effectiveness of accounting information systems of finance managers of listed companies at Tehran Stock Exchange is evaluated. The results indicate that implementation of accounting information systems at these companies caused the improvement of managers’ decision-making process, internal controls, and the quality of the financial reports and facilitated the process of the company’s transactions. The results did not show any indication that performance evaluation process had been improved.
Gh. A. Montazer; A. Bahreininejad
Volume 5, Issue 1 , July 2007, , Pages 11-27
Abstract
The subject under investigation has been Electronic Learning (e-learning) or Electronic Education (e-education), specifically concentrating on virtual university. Virtual university has been the subject of much debate in recent years. In short, the concept of virtual university denotes a learning/educational ...
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The subject under investigation has been Electronic Learning (e-learning) or Electronic Education (e-education), specifically concentrating on virtual university. Virtual university has been the subject of much debate in recent years. In short, the concept of virtual university denotes a learning/educational system/environment based on Internet where higher education is promoted using tools and techniques from information and communication technology domain. A number of virtual university projects have recently been launched in Iran. However, this subject area is currently under intense exploration at various governmental and academic levels in Iran. This paper presents a proposed adaptive and intelligent virtual university architectural system and places its emphasis on the national implementation of virtual education in Iran. Finally, comparative studies are presented and conclusions are drawn.
H.R. Maleki; M. Mashinchi
Volume 5, Issue 2 , July 2007, , Pages 35-45
Abstract
Generally, an engineering design problem has multiple objective functions. Some of these problems can be formulated as multiobjective geometric programming models. On the other hand,often in the real world, coefficients of the objective functions are not known precisely. Coefficients may be interpreted ...
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Generally, an engineering design problem has multiple objective functions. Some of these problems can be formulated as multiobjective geometric programming models. On the other hand,often in the real world, coefficients of the objective functions are not known precisely. Coefficients may be interpreted as fuzzy numbers, which lead to a multiobjective geometric programming with fuzzy parameters. In this paper, we solve the multiobjective geometric programming problem with fuzzy parameters by applying a linear ranking function. The linear ranking function is used to compare fuzzy numbers. Finally, a numerical example is given.
A. A. Safavi; I. Shames; N. Najmaei; M. Zamani
Volume 5, Issue 2 , July 2007, , Pages 67-82
Abstract
In this paper, the advantage of reinforcement learning to develop a new traffic shaper is invoked in order to obtain a reasonable utilization of bandwidth while preventing traffic overload in other parts of the network. This leads to a reduction in the total number of packet droppings in the whole ...
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In this paper, the advantage of reinforcement learning to develop a new traffic shaper is invoked in order to obtain a reasonable utilization of bandwidth while preventing traffic overload in other parts of the network. This leads to a reduction in the total number of packet droppings in the whole network. The method is implemented in a novel proposed intelligent simulation environment. Keeping dropping probability low while injecting as many packets as possible into the network, in order to utilize the available bandwidth, shows satisfactory behavior in simulation environment. On the other hand, the results show that the system can perform well even in situations that have not been previously introduced to the system.
A. Ezil Sam Leni; S. K. Srivatsa
Volume 5, Issue 2 , July 2007, , Pages 83-91
Abstract
As wireless networks with high data rate get widely deployed, improving the performance of TCP over these networks plays vital role. Wireless link losses have dramatic adverse impact on TCP performance due to the difficulty in distinguishing the congestion losses from wireless link losses. We first, ...
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As wireless networks with high data rate get widely deployed, improving the performance of TCP over these networks plays vital role. Wireless link losses have dramatic adverse impact on TCP performance due to the difficulty in distinguishing the congestion losses from wireless link losses. We first, studied the various existing Bandwidth Estimation Algorithms over the wireless networks. In this paper, we propose an enhanced bandwidth estimation technique with congestion control algorithms to improve TCP performance over wireless link with random loss. We propose, a new technique called TCP- BWIW to estimate the bandwidth and the congestion window is set accordingly. The performance of TCP-BWIW is analyzed, and it mitigates the Network congestion.
A. Zolghadrasli; S. Rezazadeh
Volume 5, Issue 2 , July 2007, , Pages 123-139
Abstract
In this paper, we introduce a multiresolution watermarking method for copyright protection of digital images. The method is based on the discrete wavelet transform. A noise type Gaussian sequence is used as watermark. To embed the watermark robustly and imperceptibly, watermark components are added ...
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In this paper, we introduce a multiresolution watermarking method for copyright protection of digital images. The method is based on the discrete wavelet transform. A noise type Gaussian sequence is used as watermark. To embed the watermark robustly and imperceptibly, watermark components are added to the significant coefficients of each selected subband by considering the human visual system (HVS) characteristics. Some small modifications are performed to improve the HVS model. The host image is needed in watermark extraction procedure, and Normalized Correlation Function (NCF) is used to measure similarities of extracted watermarks. It is shown that this method is robust against wide variety of attacks. Comparison with the existing methods shows the better performance of this suggested method.
A. R. ZOLGHADR ASLI; B. AMIN SHAH; M. A. MASNADI SHIRAZI; M. H. GHAMAT
Volume 4, Issue 2 , July 2006, , Pages 1-14
Abstract
One of the limitations of orthogonal frequency division Multiplexing (OFDM) in many applications is its sensitivity to frequency shifts, errors normally referred to as carrier frequency offset (CFO). Although, this small offset is negligible in conventional single carrier communication systems, it ...
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One of the limitations of orthogonal frequency division Multiplexing (OFDM) in many applications is its sensitivity to frequency shifts, errors normally referred to as carrier frequency offset (CFO). Although, this small offset is negligible in conventional single carrier communication systems, it is a severe problem in the OFDM systems. Because, the carriers in OFDM are inherently closely spaced in frequency, the tolerable frequency offset becomes a very small fraction of the channel bandwidth. Besides, for OFDM communication systems, the frequency offset in mobile radio channels distorts the orthogonality between subcarriers, resulting in intercarrier interference (ICI). In this paper, we analyze and compare the performance of some already existing methods for reducing ICI with new ICI cancellation schemes by simulation. Also the advantage of using a coding scheme is shown.
A. R. Zolghadre Asli; D. Bakhshi
Volume 4, Issue 1 , July 2006, , Pages 23-37
Abstract
One of the most effective techniques to mitigate multipath fading and inter-cell interference at a downlink wireless channel in WCDMA systems for achieving high capacity is transmitter power control. In this case, system increases the power of the subscriber when its interference increases in order ...
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One of the most effective techniques to mitigate multipath fading and inter-cell interference at a downlink wireless channel in WCDMA systems for achieving high capacity is transmitter power control. In this case, system increases the power of the subscriber when its interference increases in order to satisfy the requested signal qualities. However, when the requested signal qualities are infeasible, the power control algorithms might diverge as a result of power limitation. Another way to mitigate multipath problems is using diversity techniques. Space-time diversity offers an advantage in the forward link of the WCDMA system. In this paper, three environments for forward link power control, together with space-time diversity, are examined. These are indoor office, indoor-outdoor pedestrian and vehicular environments. The simulator takes into account 19 hexagonal cells with spatially uniform user distribution and a propagation channel characterized by distance attenuation, fast Rayleigh fading and inter-cell interference. Computer simulations are given to evaluate the effect of space-time diversity on convergence of downlink power control algorithms. Simulation results show that space-time diversity together with downlink power control have very good performance, especially in the vehicular environments with high mobile speed.
S. Afsharnia; R. Abbasi
Volume 4, Issue 2 , July 2006, , Pages 55-67
Abstract
The rate of scientific articles published in scientific journals is one of the indicators of assessing the status of science and technology. An increase in these publications is a sign of the movement of the society towards development and promotion. In this article, the rate of scientific publications ...
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The rate of scientific articles published in scientific journals is one of the indicators of assessing the status of science and technology. An increase in these publications is a sign of the movement of the society towards development and promotion. In this article, the rate of scientific publications in scientific journals (types A and B) during the years 2002 and 2003 will be analyzed. In order to investigate the statistics of the published articles in these journals, several indicators have been used. In spite of the fact that these analyses are based on two types of scientific journals, the statistics of journals in six scientific groups have also been distinguished and considered. The results showed that amongst the six scientific groups, Medical Sciences had the highest number of scientific type-A journals and articles and Humanities had the highest number of scientific type-B journals and articles in Iran.
R. Fattahi; M. Parirokh; M. R. Davarpanah; A. Azad
Volume 4, Issue 2 , July 2006, , Pages 69-81
Abstract
This article is a short report of a research project carried out, upon the recommendation of the Ministry of Science, Research and Technology, by the Department of Librarianship and Information Science of Meshed Ferdowsi University between 2003-2004. The goal was to study and revise the current curriculum ...
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This article is a short report of a research project carried out, upon the recommendation of the Ministry of Science, Research and Technology, by the Department of Librarianship and Information Science of Meshed Ferdowsi University between 2003-2004. The goal was to study and revise the current curriculum to bring it closer to the changing needs of the present society. The curricula of the U.S.A., England, Australia, India and Iran were reviewed and compared with the objective of introducing a new syllabus for the two fields of Information Management and IT Management. The new curriculum was sent to some experts and faculty members of the departments of Librarianship and Information Science of Iran that ran courses at M. A. level. They were asked to issue their comments on the curriculum. Then, the final version of the curriculum was verified after undergoing some revisions by the Revising Committee of Meshed Ferdowsi University. The new curriculum was also sent to the Ministry of Science, Research and Technology to be sent to universities after being approved by the Ministry.
G. A. Montazer; B. Esfahbod; H. Safi Allah
Volume 3, Issue 2 , July 2005, , Pages 49-56
Abstract
Information available on the web can be divided in two main categories. The first category is those information distributed among different websites and servers. The second category is the information gathered in central information databases (infobases) which contain a huge amount of information and ...
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Information available on the web can be divided in two main categories. The first category is those information distributed among different websites and servers. The second category is the information gathered in central information databases (infobases) which contain a huge amount of information and are available and searchable through the website representing the infobase. Infobase owners sell information to the users on per request basis, or to larger groups, based on the number of needed resources. Authentication is done in one of two ways, or both of them: username/password and IP-based. The first approach has so many practicial problems so, in this paper a new approach has been proposed based on central system as an access-point and gateway for users to receive and retrieve their information using Squash technology. The architecture and advantages of this novel method have been discussed and the way of implementation has been described.
M. Dastgir
Volume 3, Issue 2 , July 2005, , Pages 71-79
Abstract
The purpose of this paper is to review the real options literature, which has provided a promising area of development in the capital budgeting process of the firm, and to emphasize that employing the new theory, as part of the information system, depends heavily on the implementation of computer information ...
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The purpose of this paper is to review the real options literature, which has provided a promising area of development in the capital budgeting process of the firm, and to emphasize that employing the new theory, as part of the information system, depends heavily on the implementation of computer information systems, as Decisions Support Systems (DSSs). The paper concentrates on two important real options: to wait and to abandon. It is shown that in absence of the real option values in the capital decision making models, the outcome of such models would be misleading and would lead to wrong decisions. The paper furnishes some avenues for further research in capital budgeting employing real option literature.
A. R. Zolghadr Asli; E. Goodarzi; M. Moosavinezhad
Volume 2, Issue 1 , July 2004, , Pages 3-12
Abstract
This paper presents a full duplex, real time implementation of ITU-T G.723.1 [7,8] speech coder using the TMS320C5402 DSP chip which is based on a 16 bit fixed-point architecture. An optimization method is proposed in order to reduce the total necessary cycle time consumed in real-time implementation. ...
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This paper presents a full duplex, real time implementation of ITU-T G.723.1 [7,8] speech coder using the TMS320C5402 DSP chip which is based on a 16 bit fixed-point architecture. An optimization method is proposed in order to reduce the total necessary cycle time consumed in real-time implementation. The Multi-Pulse Maximum Likelihood Quantization (MP-MLQ) excitation search block which is the most computation-intensive block in the coder is restructured to reduce the algorithmic redundancy. In addition, efficient filtering methods and memory management are used for further optimization. The bit-exact verification with the ITU test vectors and performance evaluation aspects are also discussed in this paper.
M. Jamshidian; M. Rahnama
Volume 2, Issue 2 , July 2004, , Pages 11-19
Abstract
Although some researchers do not doubt the effectiveness of user participation in MIS success, research findings show that such relationships is not consistent under all circumstances. The present paper investigates the relations between user participation, on MIS success in light of the managerial ...
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Although some researchers do not doubt the effectiveness of user participation in MIS success, research findings show that such relationships is not consistent under all circumstances. The present paper investigates the relations between user participation, on MIS success in light of the managerial styles over systems growth stages. Six product-oriented companies were elected which had a minimum condition of having 1000 employees and have been experiencing MIS for at least 5 years. A sum of 48 managers and 55 users in MIS department were selected to answer four standard questionnaires. The results showed that 1) only user participation were affected in the system development stage, 2) there was no effect of managerial styles on user participation and systems success, 3) managerial styles, user participation and systems success differ in MIS growth stages and finally 4) the relationships and systems success differ over MIS growth stages.
S. H. Sajjadi; S. M. Mirtooni; M. M. Razzaghi
Volume 2, Issue 2 , July 2004, , Pages 31-42
Abstract
This paper examines the usefulness of the Auditing Organization for the auditing profession from the point of view of the Scientific Board Members of Accounting groups of public universities, Master of Science courses and Ph.D. students of Accounting at public universities, Financial Managers of ...
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This paper examines the usefulness of the Auditing Organization for the auditing profession from the point of view of the Scientific Board Members of Accounting groups of public universities, Master of Science courses and Ph.D. students of Accounting at public universities, Financial Managers of active companies in the Tehran Stock Exchange and the mangers of private Auditing Institutes. The results of our investigation show that privatization of auditing services in Iran by the Auditing Organization was not suitable for the auditing profession, since it may cause an increase in auditing costs and prevent the development of audited and private auditing institutes and results in a decrease of institutional responsiveness to society. In addition, Auditing Organization has no effect on suitable usage of economic resources by audited companies and recovery of their internal accounting control system.
Adel Azar; Habibollah Tabatabaie
Volume 1, Issue 2 , July 2003, , Pages 1-13
Abstract
In this paper, first, a conceptual framework has been developed and while truly recognizing different aspects of the technology transfer process, it is trying to introduce a decision-making methodology in the choice of projects. Then by choosing effective variables in technology transfer process, a Multiple ...
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In this paper, first, a conceptual framework has been developed and while truly recognizing different aspects of the technology transfer process, it is trying to introduce a decision-making methodology in the choice of projects. Then by choosing effective variables in technology transfer process, a Multiple Criteria Decision-Making (MCDM) model has been designed, so that the choice of appropriate technology transfer projects based on a clear criterion, would be possible. Also, in order to improve the efficiency of the designed MCDM model, possible distribution of some effective qualitative variables such as technology life cycle, technology level, the possibility of technology adoption, etc. have been observed. In this way, most of the ambiguities, which are the results of using qualitative variables in decision-making issues, in the area of technology management would become clear. In addition, the risk analysis (RA) as well as the decision-making process related to technology assessment (TA) would be possible. In this research, various examples of the previous experiences of the Iranian companies in the area of technology management have been dealt with, and by designing nearly a realistic model, the main reasons for the failure of some foreign investment projects in Iran from the point of view of technology management are discussed. At the end, while generally introducing the designed model, this research elaborates on some suggestions for the better performance of foreign investments in the area of advanced technologies in Iran.
Massoud Abessi; A. Hassanzadeh Karimabad; N. Faghih; A. Sadeghieh
Volume 1, Issue 1 , July 2003, , Pages 16-30
Abstract
A new integrated model is developed for information systems planning. In this model, entitled HISSPM, a combination of the strengths of Critical Success Factors (CSF) method, Analytic Hierarchy Process (AHP) technique and Genetic Algorithms (GA) is used to identify and prioritize the required information ...
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A new integrated model is developed for information systems planning. In this model, entitled HISSPM, a combination of the strengths of Critical Success Factors (CSF) method, Analytic Hierarchy Process (AHP) technique and Genetic Algorithms (GA) is used to identify and prioritize the required information systems. This model considers both qualitative and quantitative factors, as well as the importance of the factors to decision-makers, and can solve problems with relatively wide search space. Comparing the results of the proposed model with those of the famous available models reveals that the proposed model is valid and efficient. The model tested on a real world problem, resulting in a portfolio of prioritized information systems, under certain conditions and constraints, which have alignment with organizational goals, strategies and plans. This model can help encourge managers in optimal or near-optimal decision-making boost investments on required information systems.
A. Sanayei; M. Jamshidian
Volume 1, Issue 2 , July 2003, , Pages 26-31
Abstract
In the new millennium, Information Technology (IT) has become very effective and this is becoming evident in both developed and developing countries. These areas are especially within the fields of information gathering, in the broadest sense, and of developing and strengthening networks both internal ...
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In the new millennium, Information Technology (IT) has become very effective and this is becoming evident in both developed and developing countries. These areas are especially within the fields of information gathering, in the broadest sense, and of developing and strengthening networks both internal and external to the surrounding environment. Today, more and more companies, organizations and government offices are using the Internet to publicize or sell information about their particular area of expertise. Moreover, the speed with which information can be exchanged, e.g. between subsidiaries in a conglomerate , makes it attractive for the companies to tie these together and form networks in which experience, knowledge and resources can be easily shared across borders. Furthermore, access to a computer, a telephone line and a modem is what an ever increasing proportion of the society can afford. In this paper , we will discuss the impact of IT on Software Export , by using the experience of some developing countries such as India, … that have expanded their investment on IT and Information & Communication Technology (ICT). And finally, we will explain both external and internal software export barriers and give some suggestions for overcome the barriers, and expanding IT in Less Developing Countries (LDCs) like Iran.
Gholamhossein Mahdavi; Warwick Funnell
Volume 1, Issue 2 , July 2003, , Pages 32-45
Abstract
This paper examines the dimensions of accountability that the executive must fulfil in the Islamic Republic of Iran and the role of accounting in meeting accountability obligations as they are at present. Accountability continues to be interpreted, almost exclusively, in terms of the fiduciary stewardship ...
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This paper examines the dimensions of accountability that the executive must fulfil in the Islamic Republic of Iran and the role of accounting in meeting accountability obligations as they are at present. Accountability continues to be interpreted, almost exclusively, in terms of the fiduciary stewardship of resources appropriated by parliament. Public sector resource accounting information systems, used in the general government sector in Iran, are inadequate to ensure the fulfilment of government plans aimed at a strong economy and higher living standards. To meet broader, managerial conceptions of accountability, the move to accrual accounting in the general government sector of Iran is recommended.
S. E. ADEWUMI; E. J. D. GARBA
Volume 1, Issue 1 , July 2003, , Pages 43-55
Abstract
Encryption is an important tool for managing and protecting information. Cryptography is the only practical means of sending information over an insecure channel. These channels may be computers, telephone lines, satellite, etc. The Increasing use of electronic means of data transfer from one point ...
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Encryption is an important tool for managing and protecting information. Cryptography is the only practical means of sending information over an insecure channel. These channels may be computers, telephone lines, satellite, etc. The Increasing use of electronic means of data transfer from one point to another, coupled with the growth in networking and Internet communication, has extended the need to protect vital information- military, banking, academics (question papers), databases and the e-initiative. This paper proposes a new radical method for a secured means of encrypting and decrypting messages. The method uses data compression and systems of non-linear equations. With this, we hope that data transmission across networks will be more secured. This new proposal is in recognition of the peculiar nature of our environment where people want to break codes/messages not intended for them. The final stage is to turn the text message to a system of non-linear equations, which can be solved only when the text message gets to its intended destination.
Mir Fazlollah Mousavi; Jafar Mehrad
Volume 1, Issue 2 , July 2003, , Pages 46-58
Abstract
The first part of this article deals with ISI’s journal selection policy. Describing the importance of evaluation process as well as determining the status of Iran in knowledge production in the areas of Arts, Humanities, Social Sciences, Sciences, etc. and comparing it with the articles published ...
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The first part of this article deals with ISI’s journal selection policy. Describing the importance of evaluation process as well as determining the status of Iran in knowledge production in the areas of Arts, Humanities, Social Sciences, Sciences, etc. and comparing it with the articles published throughout the world between 1993-2000 are the next two parts of this article. The results indicate that during the aforementioned period, 5971 articles were written by Iranian researchers. Among different countries of the world, Iran’s contribution in article production was 0.03% in 1993. This number raised to 0.12% in the year 2000. The names and addresses of the Iranian researchers who have written 10 or more articles between 1993 and 2000 constitutes an important and interesting part of this article. Finally, some recommendations are made on how to increase knowledge production in Iran.
J. MEHRAD; A. SHOURE ZARI
Volume 1, Issue 1 , July 2003, , Pages 71-86
Abstract
In this study, a comparison is made between the results of the end users’ searching of RLST’s databases and those of the information experts’ searching in terms of search time, recall ratio and precision ratio. The study is primarily tasked with comparing the results retrieved through the three ...
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In this study, a comparison is made between the results of the end users’ searching of RLST’s databases and those of the information experts’ searching in terms of search time, recall ratio and precision ratio. The study is primarily tasked with comparing the results retrieved through the three different search methods of direct, indirect and mixed. Five of RLST’s information experts as well as RLST’s direct users constituted the study’s sample population. The research method and the data collection procedure used were semi-experimental method, observation and a questionnaire respectively. To test the hypotheses and to find an answer to the research questions, variance analysis, correlation coefficient as well as f, t and z tests were used at α = 0.05.
