• Title/Summary/Keyword: School security

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Elliptic Curve Cryptography Coprocessors Using Variable Length Finite Field Arithmetic Unit (크기 가변 유한체 연산기를 이용한 타원곡선 암호 프로세서)

  • Lee Dong-Ho
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.42 no.1
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    • pp.57-67
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    • 2005
  • Fast scalar multiplication of points on elliptic curve is important for elliptic curve cryptography applications. In order to vary field sizes depending on security situations, the cryptography coprocessors should support variable length finite field arithmetic units. To determine the effective variable length finite field arithmetic architecture, two well-known curve scalar multiplication algorithms were implemented on FPGA. The affine coordinates algorithm must use a hardware division unit, but the projective coordinates algorithm only uses a fast multiplication unit. The former algorithm needs the division hardware. The latter only requires a multiplication hardware, but it need more space to store intermediate results. To make the division unit versatile, we need to add a feedback signal line at every bit position. We proposed a method to mitigate this problem. For multiplication in projective coordinates implementation, we use a widely used digit serial multiplication hardware, which is simpler to be made versatile. We experimented with our implemented ECC coprocessors using variable length finite field arithmetic unit which has the maximum field size 256. On the clock speed 40 MHz, the scalar multiplication time is 6.0 msec for affine implementation while it is 1.15 msec for projective implementation. As a result of the study, we found that the projective coordinates algorithm which does not use the division hardware was faster than the affine coordinate algorithm. In addition, the memory implementation effectiveness relative to logic implementation will have a large influence on the implementation space requirements of the two algorithms.

Socio-economic status is associated with the risk of inadequate energy intake among Korean elderly (노인의 에너지 섭취 부족과 관련된 사회환경요인 분석)

  • So, Eun Jin;Joung, Hyojee
    • Journal of Nutrition and Health
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    • v.48 no.4
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    • pp.371-379
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    • 2015
  • Purpose: This study was conducted to evaluate the factors influencing inadequate energy intake among Korean elderly. Methods: Our study included 1,869 elderly people (over 60 years old) who completed a dietary survey from the fifth Korean NHANES (2010). Factors that could affect the nutritional status of the elderly included age, family status, socio-economic factors (education, family income, livelihood security, employment), and health related factors (having chronic disease, functional status, diet therapy, depression, and suicidal thoughts). Energy and protein intake were assessed using the dietary intake data from 24hr recall method. Results: The percentage of people who consumed energy less than 75% of EEA for Koreans was 23.7% in men, 31.1% in women. The carbohydrate contribution to the total energy intake in the inadequate energy intake group was significantly higher than that in the adequate intake group (p < 0.05). Factors significantly related to inadequate energy intake after adjusting for age, family status, education, family income, employment, functional status, and suicidal thoughts were education (OR: 1.480 in men, 1.614 in women) and employment (OR: 1.751 in men, 1.464 in women), age 70 years or older in men (OR: 1.475), and living with family but without spouse in women (OR: 1.496). Conclusion: In summary, the results imply that energy intake of elderly would be affected by the status of social environment with aging and nutrition-related policy for Korean elderly should be based on the social status as well as health related conditions.

An Empirical Research on the AEO utilization satisfaction effect from the AEO system's government support and post management (AEO 제도의 정부지원과 사후관리가 AEO 활용 만족도에 미치는 영향에 대한 실증적 연구)

  • Kim, Chang Bong;Han, Young Tak
    • International Commerce and Information Review
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    • v.17 no.2
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    • pp.151-171
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    • 2015
  • Recent companies have introduced AEO (Authorized Economic Operator) system for a smooth and fast customs clearance to meet the conflicting objectives of trade security and trade facilitation in international trades. The present study was to verify 150 companies that have acquired Korea's AEO certification and its impact from the government and financial support, the effects of AEO certification post management, and the AEO system's utilization satisfaction to seek ways to further activate the AEO system. The research hypothesis and model was derived on the basis of existing theory and empirical research, and obtain the following results. First, government policy supporting the AEO system after certification post management showed positive (+) effect for the AEO satisfaction. Second, AEO certification post management showed positive (+) effect for AEO satisfaction. Third, government funded factor showed negative (-) effect for AEO certification post management. The present study is differentiated from previous research information. The study evaluated the company's satisfaction with the AEO certification, and the government support has empirically evaluated the relationship between the post management and the satisfaction. Academic contribution was conducted for Korea's AEO system's post follow-up research while a practical contribution suggested the direction for our country's organization to take advantage of the AEO system.

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Convergence and Integration Review of Fire fighter Image through Disaster Movies (재난 영화를 통해 본 소방관 이미지에 대한 융·복합적 고찰)

  • Lee, In-Seob;Kim, Jee-Hee;Kim, Yun-Jeong
    • Journal of the Korea Convergence Society
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    • v.8 no.2
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    • pp.91-97
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    • 2017
  • The purpose of the study was to investigate the fire fighter image through disaster movies in Korea and other countries. From September 1 to 7, 2016, the movie search methods were carried out using movie title and key words via Wikipedia and various internet web sites from 1903 to 2016. The results included that the fire fighters had been considered as the precious person of volunteer activity regarding fire suppression, investigators, and self-sacrifice. Through the convergence and integration review of the disaster movie, this research suggested that the national based establishment of the welfare and safety system for the posttraumatic stress disorder(PTSD) and critical incident stress management(CISM) education program. This study will provide the basic data for the development of welfare and safety management for the fire fighters and let the people know the sacrifice of the fire fighters including the motto, "First in and the last out".

Ecological Functions and Losses of Traditional Korean Village Groves

  • Lee, D.-W.;Park, C.-R.
    • The Korean Journal of Quaternary Research
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    • v.18 no.2 s.23
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    • pp.65-66
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    • 2004
  • There have been groves, in many cases, along with hedgerows and remnant forests around a traditional Korean village. A village grove is very closely connected to the life of residents. Sometimes it was a holy place where important village festivals were held, and became a resting place for farmers, especially in sunny summer. As a matter of fact, it is noted that traditional Korean village groves had been fostered for many purpose as religion, Confucianism, scenery, sanitation, traffic guard, public security, agriculture, hunting, and military and public uses were included in Chosun Govemor General(1938). Village groves were usually located at the outlet of watershed inside which a village was built. In addition, village groves used to be established along part of mountain ranges, streams and streets. A unique type of village grove, called bibosoop was fostered especially where the outlet of watershed was largely opened. In other cases, it was placed where a part of mountain range was relatively low, or where village residents were likely to see ugly objects such as a huge cliff, stony upland with an unvegetated area and the like(Kim and Jang 1994). In a sense, a sheltebelt is a sort of bibosoop as it is a landscape element to complement places that are exposed to strong winds. However, it is comparable to other typical bibosoop that is situated at a topographically very specific zone of watershed. In this paper, we will address potential functions of Korean village groves from a perspective of modern landscape ecology and show current status of some remnants, based on preliminary surveys. A village grove functions as barrier or filter of objects such as water, nutrients, and other elements and habitat of wildlife (park et al. 2003, Lee 2004). The village grove slows down the flow of water and air, maintains soil moisture an hinders soil erosion, enabling cultivation of crops and bringing up creatures nearby. It contributes to enhancing biodiversity. Birds rest on shrubby and woody trees of the element. Presumably, other organisms may also inhabit the village groves and take advantage of it when those move from a forest patch to others. Emerging insects acclimate themselves in the shade of the green space before they fly to sunny air. Besides the village grove acts as a component of agroforestry system as leaf litter is shed from a grove to an asjacent agricultural area, and transformed into green manure(Lee 2004). By the way, many of the landscape elements were destroyed or declined in Koea during the past several decades. The losses have been parallel or linked to environmental degradation. Unfortunately, we have a little reliable data as for how many groves have disappeared in Korea until now. There has been no complete census on the village groves in Korea, and the viewpoints of survey were to a degree different depending on surveyors. So, it is difficult to analyze the temporal and spatial change of village groves. Currently, national inventory data of Korean village groves are available in three reports. We reviewed the locations of village groves and arranged those according to the present administrative units, DONG. With the limited data, we found that at least 484 of village groves were recorded in South Korea. Among all provinces, village groves were most in Gyeongsanbuk-Do Province and least in Chungcheongbuk-Do Province(Table 1). This is a preliminary report prepared while some quantitative data regarding functions and lossers of the village groves are being collected. More detailed data will be introduced in the near future.

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A Study on the Correlation between the Investigation on the Violation Crime of Intellectual Property Rights and the Goods Inspection in Customs Law (관세법상 지식재산권 침해사범 수사와 물품검사와의 상호관계)

  • Ye, Sangkyun
    • International Commerce and Information Review
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    • v.19 no.3
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    • pp.197-214
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    • 2017
  • It requires professional knowledge and much time to judge intellectual property rights infringement. The duties of customs administration are the balance between the propositon of trade facilitation through rapid clearance and the thesis of social security through exact examination. There is a view that the criminal procedure law control is necessary to the goods inspection of clearnce procedure if it is related to crimianl investigation. However, it seems that the customs law does not consider the goods inspection investigation as the investigation under judicial control, but only the mere administrative investigation. It can be said that the inspection of goods by customs law functioning as a clue of investigation is confined to the ordinary goods inspection, including the screening test. Searching for specific articles by specific informaition should be under the control of criminal procedure law because it constitutes the commencement of criminal investigation in criminal cases. This interpretation could be an opportunity as a harmonious operation between the goods inspection of customs clearance and the search and seizure of criminal procedure.

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Development of a Face Detection and Recognition System Using a RaspberryPi (라즈베리파이를 이용한 얼굴검출 및 인식 시스템 개발)

  • Kim, Kang-Chul;Wei, Hai-tong
    • The Journal of the Korea institute of electronic communication sciences
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    • v.12 no.5
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    • pp.859-864
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    • 2017
  • IoT is a new emerging technology to lead the $4^{th}$ industry renovation and has been widely used in industry and home to increase the quality of human being. In this paper, IoT based face detection and recognition system for a smart elevator is developed. Haar cascade classifier is used in a face detection system and a proposed PCA algorithm written in Python in the face recognition system is implemented to reduce the execution time and calculates the eigenfaces. SVM or Euclidean metric is used to recognize the faces detected in the face detection system. The proposed system runs on RaspberryPi 3. 200 sample images in ORL face database are used for training and 200 samples for testing. The simulation results show that the recognition rate is over 93% for PP+EU and over 96% for PP+SVM. The execution times of the proposed PCA and the conventional PCA are 0.11sec and 1.1sec respectively, so the proposed PCA is much faster than the conventional one. The proposed system can be suitable for an elevator monitoring system, real time home security system, etc.

Necessity Evaluation about the Outside Dining Room Accommodation to the University Meal Service (대학교 급식의 외부음식점 도입에 대한 필요성 평가)

  • Han, Kyung-Su;Lee, Yun-Jung
    • Culinary science and hospitality research
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    • v.15 no.2
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    • pp.1-16
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    • 2009
  • The purpose of the study of the book is aimed for basic document security to show necessity for the outside restaurant accommodation to the university meal service and I grasp the university meal service use action of the university student and a desire with this purpose and show it and am going to fine an article and the basics document which are necessary for the market for rationalization of the management of the university meal service. As for the reason why students like fast food to be able to choose outside dining room introduction at the part of an innovative image strategy of the university meal service. Food is serve of early and low price. The big problems of the university meal service is bad taste, high price, low service. Price satisfaction is low in the quality of the university meal service in comparison with the outside dining room. The university students who liked Korea food and Hamburger at time of the outside dining room introduction evaluated the quality of the university meal service. Therefore the outside dining room accommodation is necessary for the university meal service development also the image improvement of the university meal service and improvement of the quality and suitable price rage.

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A Study on The Waegu(倭寇)'s invasion and the importance of the Ocean Defence in the Late Goryeo(高麗) Dynasty. (고려 말 왜구 침입과 해양방어의 중요성에 대한 연구)

  • Lee, Do-Won
    • Strategy21
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    • s.32
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    • pp.36-70
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    • 2013
  • Waegu(倭寇)'s invasion in the Late Goryeo(高麗) Dynasty was huge damage for Goryeo's local society. And It was shock that Goryeo government's basic foundation of rules. Invasion background of waegu for Kyeong-in-yeon(庚寅年, 1350) was Kyushyu(九州)'s political divide because of Nihon(日本) government's confusion. Waegu was huge damage for Goryeo's Jo-wun(漕運, the shipping system of grain paid as a tax) system. So, government started military response, but it was turn out a failure and had great damage. When execution of military operations failed, Goryeo government sent diplomatic delegation to request the prevent of waegu, but the invasion continued. Since waegu invasion, Goryeo was got nowhere with defence of waegu. So, some people demanded for a new understanding of the ocean defence in the government. Lee-Saek(李穡), Woo-Hyeonbo(禹玄寶), Lee-Hee(李禧) and Jung-Ji(鄭地) were representatives of a new understanding of the ocean defence. Their demands were received attention when all operations had been failed. Therefore, Goryeo government began to reorganization of the naval forces and set up a special committee of gunpowder manufacturing named Hwa-tong-do-gam(火筒都監). This administrative reform was achieved substantial results since then. In 1380, the naval battle at Jin-po(鎭浦) was a big event that first gunpowder attack the waegu. Since Jin-po, Goryeo's naval forces gain confidence. In 1389, Dae-ma-do(對馬島) was attacked by Park-Wi(朴葳). It was meant that Goryeo's naval forces had huge offense power. Goryeo's defence system was focused on a northern race before 14th century waegu's invasion. So they were neglected their ocean defence. But after military operation of waegu's invasion was failure, they focused on the ocean defence. A new understanding of the ocean defence was foundation of that. It means to us to a new understanding of the ocean defence. Now, East Asia has maritime disputes. And we have high exposure to potential threats. So, we have a new understanding of importance of the ocean defence. And we fight for 21th century's ocean threats as foundation of sense of national security.

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Empirical Study on the Performance Analysis and Function of Jindo Coastal Vessel Traffic Service (진도 연안VTS의 성과 분석 및 기능에 관한 실증적 연구)

  • Jeong, Jae-Yong;Jung, Cho-Young
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.18 no.4
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    • pp.308-315
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    • 2012
  • Hebei Spirit Oil Spill that happened in 2007 had prompted the need of revisiting the coastal safety. In response to this, Korea had made an effort to implement VTS in every coastline in the country. There are a lot of theoretical studies on VTS function nowadays, but coastal VTS are less frequently studied. In this paper, performance analysis results and accident prevention activities of Jindo Coastal VTS center were summarized and the Coastal VTS function are investigated. Jindo Coastal VTS covers relatively wide area and various places with various maritime traffic characteristics are the major navigation vessels, which means that it is important to control these vessels. Since the probability of accidents due to human error is relatively high in coastal area due to negligence tendency of crews during coastal area navigation, coastal VTS has to provide sufficient assistance to navigating vessels. Like most harbour VTS, Coastal VTS provides not only main information service, navigational assistance and traffic organization services but also various services related with advanced search-and-rescue assistance, marine national security, maritime crime prevention, oil spill response, traffic services for non-service vessel, and safety supervision for water leisure boats.