• The Journal of Korean Institute of Communications and Information Sciences
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• v.24 no.12A
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• pp.1852-1861
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• 1999

In this paper, CDMA Reservation ALOHA scheme which can reduce multiple access interference and packet collision is proposed to support multi-traffic such as voice and random data with and without priority. In this scheme, the time slot is divided into two stage, access and transmission stage. Only packets with spreading codes assigned from base station in access stage can transmit their packets in transmission stage, so MAI can be reduced. To reduce packer collision in access stage, the code reservation and access permission probability are used. Code reservation is allowed for voice traffic and continuous traffic with priority using piggyback and access permission probability based on the estimation of the number of contending users in the steady-state is adaptively applied to each traffic terminal. Also, we analyzed and simulated the numerical performances required for each traffic using Markov chain modeling in a single cell environment.

• The Korean Society of Law and Medicine
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• v.8 no.2
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• pp.205-290
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• 2007

In Korea, abortion in the Criminal Law is an illegal act in exception of limited cases stated in the Mother and the Child Health Law. There are grounds on which abortion may be carried out - though the grounds are very limited and related such as emergency situation of woman's physical health, rape, incest and genetic diseases. The Criminal Law regulates the mother's act of abortion and the doctor's surgical performance of abortion. The Mother and the Child Health Law prescribes the medical, ethical, and genetic grounds for the legal permission of abortion. Many people tend to abuse of abortion even though they are fully aware of its illegality. The law lead to be inconsistent with its enforcement. In this paper, I would like to suggest some proposals about the legal analysis of the Abortion Regulations to reform the existing regulations and increase the effectiveness of the regulations. A national survey was carried out using telephone interview with Korean citizens from August 1th to August 31th in 2005. A total of 1,025 citizens (male: female = 49.2%:50.8%) were randomly sampled in proportion to the number of population of 17 regions. The major findings of this survey were as follows. First, 91.4% of the respondents approved of abortion based on the medical grounds. Second 83.3% of the respondents perceived that abortion may be carried out based on ethical grounds for example rape. Third, 74.3% were agreed to abortion based on genetic diseases. Forth, 64.7% were approved the abortion that unmarried woman may be carried out. In contrast 45.0% were approved the abortion that girls may be carried out, whereas 46.4% were perceived that the abortion may not be permitted. Fifth, 58.3% were disagreed the permission of abortion based on social and economic grounds. According to the survey Korean citizens seem to have positive perception on the abortion that may be carried out based on medical, ethical and genetic grounds. Whereas they worried about the abortion based on social and economic grounds. Now the Mother and the Child Health Law prescribes the medical, ethical, and genetic grounds for the legal permission of abortion. But this law does not include social and economic grounds. In cases of when the mother has a impossibility to breed her child because of her social situations and financial conditions, we should accepted the legal acceptance of abortion due to social and economic grounds.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.29 no.2
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• pp.261-273
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• 2019

Recently, with the development of IT technology, there is an increasing interest in cloud services as the number of users using mobile devices such as mobile phones and tablets is increasing. However, there is a need for techniques to control or control various methods of accessing data as the user's service demands increase. In this paper, we propose a dual key based user authentication model that improves the user 's authentication efficiency by using two keys (secret key and access control key) to access the users accessing various services provided in the cloud environment. In the proposed model, the operation process and the function are divided through the sequence diagram of the algorithms (key generation, user authentication, permission class permission, etc.) for controlling the access right of the user with dual keys. In the proposed model, two keys are used for user authentication and service authorization class to solve various security problems in the cloud service. In particular, the proposed model is one of the most important features in that the algorithm responsible for access control of the user determines the service class of the user according to the authority, thereby shortening the management process so that the cloud administrator can manage the service access permission information of the user.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.5
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• pp.1049-1056
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• 2010

Recently RFID system has been adopted in various fields rapidly. However, we should solve the problem of privacy invasion that can be occurred by obtaining information of RFID Tag without any permission for popularization of RFID system. To solve these problems, There is the Ohkubo et al.'s Hash-Chain Scheme which is the safest method. However, this method has a problem that requesting lots of computing process because of creasing numbers of Tag. Therefore We, suggest SP-Division algorithm satisfied with all necessary security of Privacy Protection Scheme and decreased in Tag Identification Time in this paper. And this paper implemented it in time standard finding the first key among the data devided into each nodes. The length of Hash-Chain holds 1000, and the total number of SPs increases 1000, 2000, 3000, and 4000. Comparing tag identification time by the total number of SPs and the number of Nodes with single node, extending the number of nodes to 1, 2, 3 and 4, when the number of nodes is 2, 40% of Performance, when the number of nodes is 3, 56%, and when the number of nodes is 4, 71% is improved.

• Quality Improvement in Health Care
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• v.25 no.2
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• pp.56-72
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• 2019

Purpose: The purpose of this study was to determine the factors that influence the performance and importance of clinical nutritionists. Methods: Ninety-nine nutritionists working in mental health institutions were assessed. Results: Factors affecting the performance of clinical nutritionists in certified hospitals were shown to have a significant positive effect on the description of treatment diet, status of clinical nutrition management, and presence of a nutrition counselor. The factors affecting importance were the number of permission beds and total work experience. Conclusions: In order to improve the accreditation system of mental hospitals, it is necessary to expand the scope of this study to include hospitals with fewer beds, and clinical nutrition management should be mandatory.

• Journal of the Korean Society for information Management
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• v.13 no.2
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• pp.189-221
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• 1996

Copyright is challenged by the rapid development of digital technology. This study investigated a number of new copyright-related issues : electrocopying, digital transmission, legal definition of multimedia, moral right, fair use et al. To use copyright works we need licensing of rights and permissions. Then at this paper we examined the scopes and contents of permission with copyright owners or publishers, also considered relationships of copyright owners with distributors and end-users. Finally, to protect rights of copyright owners and use freely copyright works, we suggested introduction of 'collective management system of copyright' and construction of 'copyright management information system' .

• International Commerce and Information Review
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• v.9 no.3
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• pp.323-341
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• 2007

International trade conflict has been increased since WTO has appeared. Like this, the cause that the number of international trade conflict has been increased is by means of enlargement of agreements range. But some new facts have been added. They are Anti-dumping, subsidy, Countervailing duty, Safeguard, the norm of intellectual property right, the procedure of permitting importing products, Technical Barriers, agricultural products, and the area of textile. Since Japanese government has decided to give lavor import quarters to China without permission of Korea, Korean government formally presented the system of lavor import quarter to WTO DSB due to WTO agreement disobedience of Japan. Accordingly, this paper has the following purpose; to analyze situation on fiber dispute of Japan. Some methods about trade barrier against Japan need to be solved from another viewpoint owing to lavor IQ dispute.

• Journal of Digital Contents Society
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• v.5 no.3
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• pp.171-175
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• 2004

In this paper, We applied CCI canceller to remove multi-user interference in co-channel environment and improved performance of TH PPM UWB-IR system. As a result, We could get reception performance that data transmission of high speed is available in small reception power applying CCI canceller. Also, We could get permission available channel capacity to maximum access number 40 in high speed transmission environment more than 100Mbps.

• Journal of the Korean Data and Information Science Society
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• v.28 no.2
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• pp.451-459
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• 2017

There are many researches showing that when a process change has occurred, variable sampling intervals (VSI) control chart is better than the fixed sampling interval (FSI) control chart in terms of reducing the required time to signal. When the process engineers use VSI control procedure, frequent switching between different sampling intervals can be a complicating factor. However, average number of samples to signal (ANSS), which is the amount of required samples to signal, and average time to signal (ATS) do not provide any control statistics about switching performances of VSI charts. In this study, we evaluate numerical switching performances of multivariate VSI EWMA chart including average number of switches to signal (ANSW) and average switching rate (ASWR). In addition, numerical study has been carried out to examine how to improve the performance of considered chart with accumulate-combine approach under several different smoothing constant and sample size. In conclusion, process engineers, who want to manage the correlation coefficients of related quality variables, are recommended to make sample size as large and smoothing constant as small as possible under permission of process conditions.

• Journal of Radiation Industry
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• v.9 no.2
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• pp.103-109
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• 2015

More recently, companies that have obtained permission to use radioactive materials or radiation device and registered radiation workers have increased by 10% and 4% respectively. The increased use of radiation could have an effect on radiation safety control. However, there is not nearly enough manpower and budget compared to the number of workers and facilities. This paper will suggest a counteroffer thought analyzing pending issues. The results of this paper indicate that there are 47 and 31.3 workers per radiation protection officer in educational and research institutes, respectively. There are 20.1 persons per RPO in hospitals, even though there are 2 RPOs appointed. Those with a special license as a radioisotope handler were ruled out as possible managers because medical doctors who have a special license for radioisotope handling normally have no experience with radiation safety. The number of staff members and budget have been insufficient for safety control at most educational and research institutes. It is necessary to build an optimized safety control system for effective Radiation Safety Control. This will reduce the risk factor of safety, and a few RPOs can be supplied for efficiency and convenience.