• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.1565-1568
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• 2005

ARP 스푸핑(spoofing) 란 ARP reply message를 동일 서브넷 상의 호스트들에게 보내어 관리자 컴퓨터가 라우터로 믿게 하는 것을 말한다. 스푸핑에 의해 패킷들이 관리자로 보내지는 상황에서 관리자가 그 패킷들을 본래 라우터로 전달하지 않고 폐기한다면 서브넷 상의 호스트들은 인터넷을 사용할 수 없는 상황이 된다. 본 논문에서는 이러한 방법을 이용하여 인터넷 차단기를 구현하였다. 구현된 인터넷 차단기는 대학교 실습실과 같은 공공의 네트워크 환경에서 필요에 의해 인터넷을 잠시 중단시킬 필요가 있는 경우 간단하게 인터넷 사용을 차단할 수 있다.

• Journal of Hospice and Palliative Care
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• v.19 no.2
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• pp.136-144
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• 2016

Purpose: To provide practical data for bioethics education, we identified correlations between recognition of good death, attitude towards withdrawal of meaningless life-sustaining treatment, and attitude towards euthanasia in nurses. Methods: Using convenience sampling, we recruited 218 nurses who had at least six-month work experience in one of the six general hospitals with 500 or more beds in Seoul, Busan, and Gyeongsang province. All participants understood the purpose of the study and agreed to take part in the study. The research tools used included the Concept of Good Death Measure (CoGD), the measurement tool for attitudes towards withdrawal of meaningless life-sustaining treatment (WoMLST), and the measurement tool for attitudes towards euthanasia. Data were analyzed using an Independent t-test, one-way ANOVA, and Pearson's correlation coefficient using SPSS 21 for Windows. Results: Nurses had normal levels on CoGD, WoMLST, and attitudes towards euthanasia. Nurses' CoGD, WoMLST, and euthanasia scores significantly differed depending on their education level, working period, and the importance of religion to them. A negative correlation was found between the CoGD and WoMLST scores, and WoMLST and euthanasia scores were positively correlated. Conclusion: Nurses should be trained to deal with ethical issues that may arise while caring for terminal patients. It is necessary for nurses to understand the concepts related to CoGD, WoMLST, and euthanasia, and to promote bioethics education with focus on decision-making and problem-solving ability in ethically conflicting situations.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.18 no.2
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• pp.171-186
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• 2023

CEOs who have started and managed small and medium-sized enterprises (SMEs) have a lot of concerns about the sustainability of their businesses in the fierce management field and sometimes have the intention to discontinue their businesses. In this study, the perception of the business environment of SMEs (intensity of competition, difficulty in manpower management), the competency of the corporate (employee competency, product or service competitiveness, digital or technical capability), the competency of the CEO's (management competency and health status of CEO), and the perception of business succession on the CEO's intention to discontinue business were empirically studied with SME CEOs. This study conducted a survey of SME CEOs in various industries from March 20 to April 15, 2022, and verified the research hypothesis using SPSS 24.0 with 296 samples obtained. As a result of the study, the intensity of competition, the difficulty in manpower management, and the perception of business succession had a positive (+) effect on the intention to discontinue the business. On the other hand, the employee competency, the product or service competitiveness, the corporate digital or technical competency, and the CEO's health status had a negative (-) effect on the intention to discontinue business. Meanwhile, it was observed that government regulations also have a moderating effect on the intensity of competition, the difficulty in manpower management, the business succession perception of CEO, and the intention to discontinue business. This study has academic significance in that the concept of 'discontinuing business', which was fragmentarily scattered according to various preceding studies, was systematized based on the level of ownership change and voluntariness. And that it empirically analyzed factors related to the intention to discontinue business targeting SME CEOs. In addition, that it observed for the baby-boomer CEOs in Korea the factors influencing the intention to discontinue business and that it was confirmed that considering their age, organizing the business stable and handing it over to the successor was another positive concept of business discontinuation.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2000.11a
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• pp.163-168
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• 2000

공업화 및 인구의 도시집중에 의해 사회간접자본 확충 및 주택 보급에 따라 건설 공사는 해마다 늘어나고 있으며 그에 따라 여러 가지 사회적인 문제점을 야기하고 있다. 여러 문제점 중에서도 건설현장의 특성상 여러 가지 기계 장비를 사용하고 있는바, 많은 소음이 발생하여 주변 거주자들의 생활의 질을 떨어뜨리고 심하게는 정신적 육체적 고통을 주고 있다. 그에 따라 건설현장은 주변사회로부터 많은 민원을 겪고 있으며 민원 처리비용으로 많은 비용을 지출하고 있으며 공사의 중단 등 많은 불이익을 당하고 있으며 결국은 공사원가 상승으로 이어지고 있다.(중략)

• 동물약계
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• no.79
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• pp.2-3
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• 2001

[ $\cdot$ ]동물용의약품등 제조업 신고 허가 $\cdot$동물용의약품등 제조업 허가사항 변경 $\cdot$동물용의약품등 수입관리자 신규 승인 $\cdot$동물용의약품등 수입자 확인사항 변경 $\cdot$동물용의료용구 제조업 신규 허가 $\cdot$동물용의약품등 제조업 휴업기간 연장 신고 $\cdot$농림부 2002년도 가축 방역사업 계획(안) $\cdot$배합사료제조용 동물용의약품 사용금지 조치 $\cdot$일본 광우병 발생에 따른 조치사항 $\cdot$돼지콜레라 예방접종 중단시기 잠정 연기

• Proceedings of the Korean Information Science Society Conference
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• 2002.10e
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• pp.307-309
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• 2002

멀티캐스트는 네트워크 대역폭을 효율적으로 사용하기 위한 방법으로써, 한번의 전송으로 동일한 데이터의 수신을 원하는 여러 수신자들이 동시에 받을 수 있도록 해줌으로써, 동일한 데이터를 여러 번 전송함으로써 발생하는 대역폭의 낭비를 줄인다. 그와는 달리 혼잡 제어 기술은 어떻게 대역폭을 여러 사람들이 공평하게 나누어 사용할 것이며, 대역폭의 이용률을 최대화할 것인가를 주된 연구 대상으로 한다. 특히, 혼잡 제어 기술은 인터넷에서 더욱 중요한 부분으로 혼잡 제어 메커니즘이 적용되어 있지 않은 플로우는 네트워크 사용의 불공평성과 혼잡으로 인한 네트워크 동작 중단(congestion collapse)을 초래한다〔1〕.따라서 새로운 프로토콜을 제안하는 데 있어서 핵심 기능 중 하나는 효율적인 혼잡 제어 메커니즘의 유무이며, 그 혼잡 제어 기법이 인터넷 트래픽의 대부분을 차지하고 있는 TCP와 공평하게 대역폭을 나누어서 사용할 수 있는가가 프로토콜 평가의 중요한 기준중 하나이다. 본 연구에서는 기존의 일대다 신뢰적 멀티캐스트를 위한 혼잡제어 기법들의 비교 분석을 통하여, 각각의 특성을 밝히며, 각 기법들의 특징을 비교함으로써 다대다 멀티케스트 혼잡 제어를 위한 가장 적합한 방법을 알아본다.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.7 no.4
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• pp.187-194
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• 1974

When rearing fish at recirculating filter systems, some pesticides are often used for controling various fish diseases. In this case, the pesticides are usually applied after stopping the filteration, from a view point of affecting the filtering ability of oxidation and decomposition by killing the decomposing bacteria in the filter system. Therefore, a great inconvenience is usually net. The authors carried out a series of experiments, and the influence of 3 kinds of treatments of pesticides, formalin 33 ppm+matachite green 0.15 ppm, dipterex 0.25 ppm, and furanace 0.1 ppm, to the filtering ability expressed as the consumption rate of dissolved oxygen and depletion of ammonia-nitrogen during the passing time through the filter layer was investigated, and it was found out that these pesticides with above mentioned concentrations which is normally used for controling several kinds of diseases and parasites during the time of eel culture, did not affect the filtering ability. Consequently, it can be said that these pesticides with above mentioned concentrations can he used without stopping filteration.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.3
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• pp.1016-1022
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• 2010

An Experimental study of cleaning solution has been performed on a high capacity steam boiler burning heavy fuel oil to on-line cleaning of deposit. The deposit is mixture of soot, slag, ash, metal oxide and clinker. The traditional technology of deposit cleaning was carried hand-crafted. The conventional technology of boiler cleaning method is mechanical removal by the worker while the boiler shut down operation. In this experiment, the deposit of mixture of soot, slag, ash, metal oxide and clinker has been removed by the cleaning agents without shut down of boiler burning. This study found out the optimum cleaning solution composition. The best results have been obtained when the mixture of ammonium nitrate and $MgNO_3$ were used in cleaning solution. The various transition metal effect was investigated for optimum mixing condition. In this research, the metal compound additive of the clean solution compoition was obtained. The combustion efficiency was improved by on-line cleaning with derived clean solution compoition. On-line cleaning method prevents the fouling and corrosion in the boiler and heat exchanger.

• The Journal of the Korea Contents Association
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• v.4 no.4
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• pp.197-203
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• 2004

In mobile network, the maintenance o( host grouping or the multicast delivery tree for multicasting algorithm becomes a major issues. In this paper, we explore the issues of mobile Multicast scheme using Mobile-IPv6, and addresses case when a mobile host is a source as well as a recipient of a given multicast operation using MLD(Multicast Listener Discovery) scheme, and the proposed MLD-based multicasting protocol asks its HA(Home Agent) to stop forwarding multicast for group using tunneling. We examine and compare our model to existing approaches by proposed cost model, and observe an improved ferformacne.

• Journal of the HCI Society of Korea
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• v.13 no.3
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• pp.43-53
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• 2018

Facebook, which has the largest number of users worldwide, has both positive and negative effects on our lives and society. The positive effects include social support from others, relationship building, entertainment, etc. In contrast, Facebook users also experience negative emotions such as tiredness and irritation, resulting in dissatisfaction as well as withdrawal from Facebook. The current study investigates both positive and negative effects of the use of by different demographic characteristics (i.e., age and gender), Facebook usage pattern (i.e., posters vs. lurkers), and Facebook usage time and frequency. The results show that (1) female users (vs. male users) feel higher level of fatigue and display stronger intention to discontinue Facebook. Moreover, (2) posters (vs. lurkers) feel higher level of positive emotions and social support, and stronger intention to continue Facebook. Lastly, (3) heavy users (vs. light users) exhibit higher level of positive emotions and stronger intentions to continue Facebook. This research sheds light on the fact that the characteristics of users affect individuals' intention to discontinue SNS and offers practical implications on the ever-expanding SNS market.