• 해양환경안전학회지
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• 제23권1호
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• pp.9-16
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• 2017

우리나라 주요 항만의 입출항 통항패턴을 연구하기 위한 사전 연구로서, 부산항에 입 출항하는 위험화물운반선의 통항량을 항만운영정보시스템(Port Management Information Systim, Port-MIS) 자료를 이용하여 사전 조사하고, 통항량이 가장 높은 각 계절별 연속 3일을 선별하였다. 해양안전종합정보시스템(General Information Center on Maritime Safety & Security, GICOMS) 자료를 이용하여 선별된 12일간 위험화물운반선의 부산항 주요 통항로의 통항 패턴을 분석하였다. 또한 주요 입출항 지점인 북항 오륙도 방파제와 감천항 동방파제의 위험 화물운반선의 통항 이격거리를 분석하였다. 항로 단면에서 선박의 궤적이 정규분포를 이룬다는 가정을 근거로 해상교통안전진단 등에서 정규분포의 누적 확률분포 함수를 이용하여 충돌확률을 추정하여 사용하고 있지만, 오륙도 방파제 입출항 및 감천항 동방파제 입항에서의 선박의 항해 궤적은 KS-test 및 SW-test를 이용한 정규성 검정결과 정규분포를 따르지 않는 것으로 평가되었다. 특히 북항에서는 선박의 우측통항 경향이 두드러지게 나타났다. 일반적인 통항이론의 적용보다는 항만의 특성에 맞는 통항모델을 개발하여, 해상교통안전진단 등에서 적용하는 것이 바람직하여 이에 대한 후속연구가 필요할 것으로 판단된다.

• 한국컴퓨터정보학회논문지
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• 제25권1호
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• pp.131-140
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• 2020

본 연구는 소비자들의 개인품절반응지수(ISRI) 개발에 대한 연구로, 온라인 쇼핑 시 품절 상황에 대한 소비자들의 인지적 반응, 감정적 반응 및 행동적 반응의 영향을 분석하였다. ISRI는 선행연구인 Kim and Lee(2016/2018)의 인지, 감정 및 행동적 반응을 근거로 하여 개발하였다. 설문 조사는 인터넷 설문 조사 기관에서 2014년 07월에 2주간 진행되었으며 754명의 설문대상자 중 전체 질문에 응답한 회수된 설문지는 총 526부였다. 이 회수된 설문지를 본 연구의 조사에 이용하였다. 자료의 분석은 SPSS 25.0 Package를 이용하였다. 개인풉절반응지수(ISRI)는 정규분포를 형성하였다. 본 연구의 개인품절반응지수(ISRI)는 개인화, 맞춤화가 급속도로 진행되는 4차산업혁명 시대에 소비자의 불편한 쇼핑상황인 품절 시 대안의 마련 근거로써 실무적 의의를 가진다.

• Structural Engineering and Mechanics
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• 제55권3호
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• pp.555-581
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• 2015

Triangular pyramid and Quadrangular pyramid elements for partial double-layer spherical reticulated shells of pyramidal system are investigated in the present study. Macro programs for six typical partial double-layer spherical reticulated shells of pyramidal system are compiled by using the ANSYS Parametric Design Language (APDL). Internal force analysis of six spherical reticulated shells is carried out. Distribution regularity of the stress and displacement are studied. A shape optimization program is proposed by adopting the sequence two-stage algorithm (RDQA) in FORTRAN environment based on the characteristics of partial double-layer spherical reticulated shells of pyramidal system and the ideas of discrete variable optimization design. Shape optimization is achieved by considering the objective function of the minimum total steel consumption, global and locality constraints. The shape optimization of six spherical reticulated shells is calculated with the span of 30m~120m and rise to span ratio of 1/7~1/3. The variations of the total steel consumption along with the span and rise to span ratio are discussed with contrast to the results of shape optimization. The optimal combination of main design parameters for six spherical reticulated shells is investigated, i.e., the number of the optimal grids. The results show that: (1) The Kiewitt and Geodesic partial double-layer spherical reticulated shells of triangular pyramidal system should be preferentially adopted in large and medium-span structures. The range of rise to span ratio is from 1/6 to 1/5. (2) The Ribbed and Schwedler partial double-layer spherical reticulated shells of quadrangular pyramidal system should be preferentially adopted in small-span structures. The rise to span ratio should be 1/4. (3) Grids of the six spherical reticulated shells can be optimized after shape optimization and the total steel consumption is optimized to be the least.

• 대한소아치과학회지
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• 제24권1호
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• pp.41-57
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• 1997

The present study investigated the effects of hyperbaric oxygen therapy on periodontal wound healing of replanted rat tooth. 80 rats (Sprague-Dawley strain) weighting $130{\pm}5gm$ were selected and divided into experimental and control group, each group consisting of 40 rats. Rats were administered 0.4% ${\beta}$-aminoproprionitrile for 5 days to achieve gentle tooth extraction. The maxillary first molars were extracted under anesthesia with pentobarbital, washed in sterile distilled water, treated with bacterial collagenase to remove collagen fibers on the root surfaces. After washing in water overnight, the mesial root surface were demineralized by application of citric acid, washed, dried and stored at $4^{\circ}C$. Immediately after tooth extraction and bleeding control, the treated molars extracted previously from other rats were replanted. The experimental group was exposed to hyperbaric oxygen at 2.5 atm. for 2 hrs. a day during experimental period. Eight animals of each group were sacrificed 1, 3, 6, 8, 10 days after reimplantation of teeth by intracardiac perfusion with 4% paraformaldehyde. The replanted molars and surrounding tissues were cut, demineralized, dehydrated and embedded in paraffin. Sections were stained with azan, toluidine blue and hematoxylin. Some other sections were stained by means of immunostaining achieved by the avidinbiotin complex method. The results as follows; 1. Experimental group showed fast healing of gingival epithelium. 2. Macrophage and newly formed blood vessels appeared early in the gingival connective tissue of experimental group. 3. Experimental group showed fast, abundant fibroblast proliferation and regularity of collagen fiber. 4. In both group, collagen was distributed along the collagen fiber. The distribution was strong and regular in the experimental group. 5. In the regenerated periodontal ligament of experimental group, fibers showed regular arrangement and invaded root surface fast.

• 한국의류산업학회지
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• 제16권1호
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• pp.118-127
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• 2014

This study proposed a revision of standard sizing system for infant clothing to provide exact information for consumers and manufacturers. The size designation was set up by compensating the defect of existing system. Basic body measurement and reference body measurement were analysed according to size designation. The ages of the infants ranged from 0 to 36 month in accordance with safety standard of KC Self-Regularity Safety Confirmation. The results are as follows: Size designation for infant clothing was based on height that was basic body measurement. Chest girth, waist girth, head girth, arm length, foot length and weight were also analysed according to age of the month. It was proposed that height could be written alone and height with age of month did together for size designation. Size intervals of basic and reference body measurements were fixed as follows: size intervals are 5 cm in height, 2 cm in chest girth, 2 cm in waist girth, 1 cm in head girth, 2 cm in arm length, 0.5 cm in foot length and 2 kg in weight. The distributions of height and chest girth showed normal distributions. As height was taller, chest girth was also bigger. But the distribution of waist girth didn't show remarkable change with age of month. The distributions of arm length and weight showed remarkable difference with growth in 0~9 months, but the amount of growth variation got less in 12~18 months.

• 한국보건간호학회지
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• 제9권2호
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• pp.80-91
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• 1995

This Study was conducted to describe relatioship between health promoting behaviors and Self-efficacy of 427 Students during the period form June 1. 1994 to June 30. 1994. The research Scale used Kim and Choe's (994) that was modified Sheredr and Maddux's (1982) Self-efficacy measurement scale. Data was. analysed by SPSS-PC program. and reavealed to percentage. t-value. F-value and Pearson's correlation coefficency. 1. The general characteristics of subjects was that men $55\%$. average age 22.5years old. There are the most highest destribution in religion. abscence $52.2\%$. and in residence. own house $49.9\%$ There are 129 subjects $(30.2\%)$ regularity exerciseed now. and 46 subjects $(35.7\%)$ exercise time was above 30 mins below 1 hour. There are 78 subjects $(60.5\%)$ above 4 times per weeks the most highest distribution in exercise times. 2. Health promoting behaviors score of subjects was 94.287 (2.548) and self-efficacy was 967.63 (69.12) 3. There are statistically significant difference in health promoting behavior score according to sex. sibling number. residence place (p<.05). In the subconcept of health promotion lifestyle profile (HPLP). there was the more higher score in men than women for self actualization (t=2. 67. p=.008). exercise(t=5.92. p=.000). There are statistically significant difference in nutrition according to sibling number (F=3.05. p=0.01). resident place (F=2.93. p=0.02). and in interpersonal support according to religion (F=2.88. p=0.02). 4. In the Self-efficacy score. there was statistically significant difference according to sex (t= 5.88. p=.000). 5. There was postive correlation between health promoting behavior and self-efficacy (r=.43. p=.000). On the basis of this result. I hope that develp Korean type health promoting behavior scale to understand health promotion for people. and nursing intervention method to improve health promoting behavior through increasment of Self-efficacy.

• 한국항해항만학회지
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• 제28권3호
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• pp.185-191
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• 2004

평균법과 클러스터링은 다속성 평가문제에서 널리 쓰이고 있는 중요한 데이터 마이닝 기법들이다. 그러나, 다양한 다속성 평가 문제에서 데이터 마이닝을 할 때, 데이터들의 특징은 그 중요성이 달라질 수 있기 때문에 이러한 데이터의 중요도 차이를 고려해야 할 필요가 있다. 따라서, 이러한 기법들은 데이터의 선택 및 중요도 등과 같이 그 특징을 얼마나 잘 반영하는 지가 중요하다. 게다가, 산술평균법의 경우에는 우선순위 및 가중치로 정의되는 평가구조에서 적합한 결과를 산출하기에는 한계가 있을뿐 만 아니라, 평가자 그룹별 특징을 반영하기 곤란하다. 따라서, 본 연구에서는 기하학적 도형을 바탕으로 유사도를 평가하여, 평가자 그룹별로 특징지어지는 이산적인 환경에서의 평균을 산출하는 알고리즘을 제안하였다. 본 알고리즘의 핵심사항 중 하나는, 항목별 우선순위의 혼돈없이 유사도를 평가할 수 있다는 점이다.

• 한국식품영양학회지
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• 제29권6호
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• pp.1070-1078
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• 2016

This study investigated the nutrition education realities and nutrition status of children in community child centers, by analyzing the status of nutrition education, nutrition quotient (NQ), and the level of maintaining dietary guidelines. The subjects were 173 children from grades 1 to 6, enrolled in community child centers, Jinju, Kyungnam. The NQ was examined by a questionnaire, which was a checklist of 19 food behavior items. The distribution of scores (out of 100) in the nutrition quotient were as follows: total score of NQ was 59.4, balance 56.6, diversity 60.6, moderation 65.6, regularity 60.9, and practice 56.7. Nutrition quotient was higher in the higher graders due to significant differences in the area of variety. The level of maintaining dietary guidelines was higher in girls, especially in the area 'eat politely with family', and higher amongst the upper graders in the area 'have safe snack wisely'. To improve the eating habits and nutritional status of the children in community child centers, their nutritional state should be checked with regular and systematic education, and their nutritional management should be pursued continuously. Since the assessment of the eating behaviors and the nutritional state of children is important at home as well as in schools and community child centers, nutritional education should be further extended to the parents and their care givers. This study can be implemented as basic material for the nutritional education of children, to minimize the dangers of malnutrition and to help build up the right eating habits amongst children in community child centers.

• 한국식생활문화학회지
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• 제29권6호
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• pp.511-518
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• 2014

This study was conducted to investigate the degree of practice of dietary behavior and dining out in accordance with intake of sodium among male and female adults aged 20 years or older residing in the Seoul Metropolitan area or Chungcheong Province. A total of 530 copies of the questionnaire were distributed from May to July, 2014. The SH group who responded that they eat a lot of sodium constituted 30.6% (158 people), followed by the SM group who responded that their sodium intake is about average at 55.7% (288 people) and the SL group who answered that they do not eat much sodium at 13.7% (71 people). Those in the SL group showed positive results for dietary behavior patterns. The SL group showed the lowest rate in terms of how often they eat harmful foods, including processed foods, sweet foods, salty foods, or food with high animal fat content such as pork belly. Positive results among the SL group were prominent in terms of avoiding over-drinking, regular exercise, and nutritional knowledge, indicating greater health management. The distribution of each group in terms of self-perceived sodium intake showed significant differences across age, gender, and household income in terms of frequency of fast food intake, regularity of meals, purchase of foods with consideration of sodium amount, frequency of missed meals, balance of food intake, and health management habits.

• 산업경영시스템학회지
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• 제38권3호
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• pp.149-158
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• 2015

The purpose of this paper is to investigate the determinants of new product diffusion. We seek to document and explain systematic features of product diffusion. In this essay, we examine the well-documented empirical regularity that the speed of diffusion has accelerated during the twentieth century. The empirical results show that the main source of acceleration are faster declines in prices. Faster price declines make the product affordable to more consumers within a given period of time. Based on theories of intertemporal price discrimination and learning-by-doing, the association between the speed of adoption and the speed of price decline was explained. Faster price declines are attributed to several product characteristics as well as changes in income distribution. Above all, the introduction of consumer electronic products in more recent years can be regarded as the most important factor in accelerating price declines. Consumer electronic products are technologically different from non-electronic goods, in that semiconductors are important components. As the price of semiconductors has dropped rapidly, the falling production costs can be rapidly incorporated to the price of consumer electronic goods. Furthermore, most of the recently introduced consumer electronic products have network externalities, and many products with network externalities require complementary products. A complementary product becomes more readily or cheaply available as more people have the main product. One major difference between previous studies and this study is that the former focuses only on the factors that operate directly on the speed of adoption, while this study incorporated factors that work through price changes as well as the factors that work directly on the speed of adoption.