• 농촌계획
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• 제18권3호
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• pp.13-24
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• 2012

This study aimed to investigate the images that affect general travel behavior and satisfaction of eco-tourists of Section seven of Jeju Olle-gil and to give eco-tourists preferred images to newly constructed eco-tour sections. Adjectives were selected to evaluate images, and for analysis, a survey was carried out with 132 persons who have toured 7 section of Jeju Olle-gil. On this survey, basic travel type, overall satisfaction, image before and after experience, age, gender, satisfaction level and accompanying type were inquired. 81(61.4%) knew section 7 of Jeju Olle-gil 'in advance', and 58(39.1%), which takes up the largest portion in this question, came to choose section 7 by a word of mouth. 95(71.9%) answered that they stayed 2 nights and 3 days, and 55(41.7%) answered that they stayed at a pension as accommodation. As for accompanying type, 34(25.7%) answered they accompanied family and relatives. As for the decision of visit, 60(45.5%) replied that they decided one month prior to the visit. And as for the purpose of visit, 63 (33.8%) replied they visited to appreciate nature. The adjectives that demonstrate overall satisfaction and significance level of the tourists were 'placid', 'refreshing', 'living', 'mountainous' and 'green'. As for the satisfaction level, people were satisfied with its environment, cleanliness level and direction boards. The types of section preferred by the tourists were clay pavements, followed by sand-masa soil mixture pavement and wooden deck pavement. 'Oidolgae' section was selected as the representative section, and 10:00a.m.~12:00p.m. was preferred as visiting time. And it is also proved that people were positive in appointing photo zones.

• 한국철도학회논문집
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• 제11권5호
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• pp.504-512
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• 2008

본 연구는 합리적인 역세권 범위를 설정하고 이에 미치는 요인을 규명하기 위해 CHAID분석을 이용하여 서울시의 강남 강북지역에 대해 SIA모형을 개발하였으며, 그 결과를 요약하면 다음과 같다. 첫째, 지하철 역세권에 영향을 미치는 변수를 중심으로 상관관계를 분석한 결과, 역세권 지가에 영향을 미치는 주요요인이 도보거리로 나타났으며, 두 관계를 이용하여 SIA모형을 개발하였다. 둘째, SIA모형식(선형식, 2차 다항식)을 비교분석한 결과, 강남 북의 역세권의 범위는 지하철역사로부터 도보거리기준으로 강남지역이 767m, 강북지역이 452m로 각각 다르게 나타났다. 셋째, 강남지역의 구간 1(0$\leq$175m)의 경우 역으로부터 거리와 가격과의 관계가 선형이 아닌 2차 다항식의 형태를 나타내고 있다 따라서 현행 도시철도법상 역세권 범위 반경 500m의 기준을 획일적으로 적용하기 보다는 도시의 지역적 특성을 고려하여 재설정하는 것이 바람직하다고 판단된다.

• 대한토목학회논문집
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• 제41권4호
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• pp.469-475
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• 2021

하천시설물의 효과적인 유지관리에는 대상물에 대한 지속적인 데이터 수집이 선행되어야 한다. 하지만, 토탈스테이션, GNSS 및 지상레이저스캐너를 활용하는 기존의 데이터 취득방식은 일반적인 시설물과 달리 넓고 긴 지역에 분포해있는 하천시설물의 공간정보데이터를 취득하는데 비용/시간/인력 측면에서 한계가 있다. 반면, 플랫폼이 이동하면서 데이터를 취득하는 모바일매핑시스템(MMS)은 넓은 지역에 대한 정밀한 공간정보데이터를 빠른 시간 내에 취득하기 때문에, 하천 주변의 선형시설물에 대한 유지관리에 활용되기 적합하다. 4 km에 달하는 연구지역에 모바일매핑 시스템을 적용하여 본 결과, 20분의 데이터 취득 소요시간 동안 184,646,099개의 포인트를 취득하여 378개의 횡단면을 추출하고 이를 하천기본계획 상의 도면과 비교해 봄으로써, 모바일매핑시스템을 이용한 효율적인 제방관리가 가능함을 확인하였다.

• 융합보안논문지
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• 제21권1호
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• pp.45-53
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• 2021

망분리 네트워크에서 보안관제를 할 경우 내부망 또는 위험도가 높은 구간에서는 평시 이상징후 탐지가 거의 이루어지지 않는다. 그렇기 때문에 보안 네트워크 구축 후 최적화 된 보안구조를 완성하기 위해서 망분리된 내부방에서의 최신 사이버 위협 이상징후를 평가할 수 있는 모델이 필요하다. 본 연구에서 일반 네트워크와 망분리 네트워크에서 발생하는 사이버 취약점과 악성코드를 데이터셋으로 발생시켜 평가하여, 망분리 내부망 사이버 공격에 위협 분석 및 최신 사이버 취약점을 대비 할 수 있게 하고, 특성에 맞는 사이버 보안 테스트 평가 체계를 구축하였다. 이를 실제 망분리 기관에 적용 가능한 평가모델을 설계 하고, 테스트 망을 각 상황별로 구축하여 실시간 보안관제 평가 모델을 적용하였다.

• 한국식품영양학회지
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• 제32권1호
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• pp.50-60
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• 2019

The importance and satisfaction with the purchasing characteristics and choice attribute of home meal replacement (HMR) products for consumers aged between 20 and 40, or over 50. In addition to identify the factors that must be first considered in the development of HMR products importance-performance analysis. 791 consumers aged between 20 and 40, or over 50, living in Seoul have experience in purchasing HMR participated in the survey. The survey consisted of four sections: The purchasing characteristics of HMR, the importance and satisfaction with HMR choice attribute, and general questions. T-tests and IPA were conducted to compare the groups of consumers aged between 20 and 40, or over 50. The factor analysis show the following results: 0.899 for "convenience", 0.094 for "hygiene", 0.871 for "quality", 0.834 for "taste", and 0.822 for "price". The average score of the importance of the choice attribute when purchasing HMR products 3.50. For consumers aged between 20 and 40, the score 3.49. For consumers over 50, the score 3.52. There is a significant difference "hygiene (p<0.001)", "quality (p<0.05)", and "price (p<0.05)". For consumers aged between 20 and 40, the score 3.72. For consumers over 50, the score was 3.78. There a significant difference only in "hygiene (p<0.05)". The results of the IPA demonstrate that the categories that belong to "Focus here" are "new HMR products" and "diverse HMR products" for all consumers aged between 20 and 40 and over 50. Hence, food companies should endeavor to develop new and diverse HMR products first.

• 의학교육논단
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• 제21권2호
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• pp.100-111
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• 2019

There are several dimensions of academic burnout experienced by medical and health science college students. The purpose of this study was to examine the effects of academic relationships on academic burnout. Data was collected from 476 Eulji University students using an online survey over 4 days in April of 2018. Of the 264 respondents, 111 studied medicine (42.0%), 105 studied nursing (39.8%), and 48 studied clinical pathology (18.1%). The questionnaire was composed of the following sections: demographics (four questions), general life characteristics (seven questions), academic enthusiasm (eight questions), academic relationships (15 questions), and academic burnout sub-dimensions (partially revised Maslach Burnout Inventory-Student Survey Scale) (11 questions). T-tests and one-way analysis of variance were performed to illustrate the differences among the three departments. The effects of academic relationships and academic enthusiasm on academic burnout were analyzed using linear regression. Comparing the three departments, academic burnout was not found to be statistically significant (p=0.296). However, medical students' academic enthusiasm was significantly lower (p<0.001) and academic relationships were significantly higher (p<0.001) than nursing and clinical pathology students. The difference in academic burnout among the three departments was not significant. However, medical students have stronger academic relationships, while nursing and clinical pathology students were more focused on academics. Relationships and academic enthusiasm contribute to reducing academic burnout. Therefore, strategies need to be developed to deal with academic burnout considering relationship factors.

• 한국재난정보학회 논문집
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• 제17권3호
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• pp.543-555
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• 2021

연구목적: 본 연구는 보행교통사고 사망사고 중 많은 비중을 차지하고 있는 무단횡단 보행자의 보행특성을 분석하는데 목적이 있다. 연구방법: 분석 방법은 영상장비를 이용하여 무단횡단 보행자의 자료를 수집한 후, 고령자와 비고령자의 무단횡단 특성에 대한 빈도분석과 통계적 검증을 수행하였다. 연구결과:고령자와 비고령자의 무단횡단 특성에 차이가 있는 것으로 나타났으나, 보행속도의 경우, 유의미하지 않는 결과가 도출되었다. 그러나 고령자 중 보행이 어려운 그룹은 그렇지 않은 그룹에 비해 보행속도가 낮은 것으로 나타났다. 결론: 무단횡단은 연령대 및 보행능력에 의한 문제가 아닌 불법행위에 대한 인지 및 사고 위험에 대한 안전불감증이 원인 중 하나로 안전 교육과 무단횡단 다발 구간에서 운전자의 주의를 요구하는 보행자 정보 제공이 필요할 것으로 판단된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권7호
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• pp.2610-2630
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• 2021

The aim of this paper is to propose the alternative algorithm to finish the process in public key cryptography. In general, the proposed method can be selected to finish both of modular exponentiation and point multiplication. Although this method is not the best method in all cases, it may be the most efficient method when the condition responds well to this approach. Assuming that the binary system of the exponent or the multiplier is considered and it is divided into groups, the binary system is in excellent condition when the number of groups is small. Each group is generated from a number of 0 that is adjacent to each other. The main idea behind the proposed method is to convert the exponent or the multiplier as the subtraction between two integers. For these integers, it is impossible that the bit which is equal to 1 will be assigned in the same position. The experiment is split into two sections. The first section is an experiment to examine the modular exponentiation. The results demonstrate that the cost of completing the modular multiplication is decreased if the number of groups is very small. In tables 7 - 9, four modular multiplications are required when there is one group, although number of bits which are equal to 0 in each table is different. The second component is the experiment to examine the point multiplication process in Elliptic Curves Cryptography. The findings demonstrate that if the number of groups is small, the costs to compute point additions are low. In tables 10 - 12, assigning one group is appeared, number of point addition is one when the multiplier of a point is an even number. However, three-point additions are required when the multiplier is an odd number. As a result, the proposed method is an alternative way that should be used when the number of groups is minimal in order to save the costs.

• 한국포장학회지
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• 제28권1호
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• pp.67-73
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• 2022

The food cold chain refers to a technology and distribution supply chain applied to maintain a constant temperature suitable for the product from production (harvest) to delivery to consumers. In particular, in Korea, the insulation material used in the food cold chain is mostly EPS (Expanded Polystyrene), which is used as a transport container for various food cold chains. However, according to the government's eco-friendly policy, companies charge environmental contributions to the use of EPS, but due to its low price and convenience of handling, it is still used as a container for delivering food. In this study, in order to measure the domestic delivery environment of general refrigerated foods, changes in impact, temperature, and humidity during transport of the EPS packaging system containing foods and ice pack refrigerants were measured. As a result, there were 2?3 sections in which a high impact force of 40 G or more was generated during transport. This can cause damage to the product and EPS container. The difference in temperature and humidity changes by parcel transport routes is more than 30%, so it is necessary to present accurate standards for the domestic cold chain distribution environment. As a result of microbial experiments. the transportation period had a dominant effect on the increase in total viable count and E. coli count.

• 해양환경안전학회지
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• 제28권7호
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• pp.1274-1280
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• 2022

전산유체역학을 사용하는 일반적인 선박의 저항성능 평가는 많은 시간과 비용이 필요하며, 이를 줄이기 위한 다양한 방법이 연구되고 있다. 선박의 주요 치수나 단면을 이용하는 기존의 방법들은 선형에 크게 좌우되는 저항성능을 추정하는데 한계가 있다. 본 논문에서는 선형 격자의 기하학적 정보를 입력으로 선체 표면의 저항성능을 빠르게 추정할 수 있는 심층신경망 모델을 제안한다. Perceiver IO 기반의 제안하는 심층신경망 모델은 시간 단계별로 계산이 필요한 전산유체역학 기법과 달리 바로 저항성능 추정이 가능하며, 저속비대선의 일종인 50K 탱커 선박을 대상으로 한 데이터집합에서 평균 1% 미만의 오차로 저항성능을 추정하는 결과를 보인다.