• Journal of Korean Society of Water and Wastewater
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• v.28 no.6
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• pp.681-690
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• 2014

It is known that sewer problems are the major causes of road cave-in. The objective of this study is to analyze the risk of road cave-in due to storm sewer laterals. We investigated 174 storm sewer laterals using a zoom camera at O-dong area in Seoul. The causes of road cave-in were classified into five cases: breakage of rigid pipe, deformation of flexible pipe, out of pipeline alignment, changing pipe material or changing pipe diameter, and a poor linkage between lateral and sewer. In addition, all defects were sorted into five grades based on the severity rating at storm sewer laterals. In this study, the most fragile pipe materials were found to be concrete pipe and polyethylene pipe, which recorded 2.3 and 1.69 defect rates. With regard to the causes of road cave-in, deformation of flexible pipe has a large influence on road cave-in at present. On a long-term basis, the two causes, out of pipeline alignment and a poor linkage between lateral and sewer, could have more influence on road cave-in.

• Korean Journal of Child Studies
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• v.33 no.3
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• pp.23-43
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• 2012

The purposes of this study were to verify the frequency of and causes and expression types of anger in children, which had been identified by means of a Q-tool and to investigate the relationship among the types of causes and expressions of anger, emotional intelligence, and social competence. The subjects of this study were 1,018 children aged between 8 to 10 years of age. MANCOVA and Logistic regression analysis were utilized. The major findings of this study were as follows : (1) a Q-Tool was developed through the selection of statements representing the feature of each type of anger, in terms of both-cause and expression. (2) Social competence revealed significant differences according to children's gender and emotional intelligence revealed significant differences according to children's gender and the types of anger causes, and (3) Emotional regulation out of subordinate variables of emotional intelligence, and interpersonal adjustment out of subordinate variables of social competence affected the types of expressions of anger in children.

• Journal of the Society of Naval Architects of Korea
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• v.59 no.3
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• pp.164-172
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• 2022

A HAZID is a brainstorming workshop to identify hazards in an early phase of a project. It should be flexible to capture all probable accidents allowing experienced participants to exploit their expertise and experiences. A bowtie analysis is a graphical representation of major accident hazards elaborating safety measures i.e. barriers. The result of these workshops should be documented in an organized manner to share as good as possible details of the discussion through the lifetime of the project. Currently results are documented using a three-step representation of an accident; causes, top event and consequences, which cannot capture correctly sequence of events leading to various accidents and roles of barrier between two events. Another problem is that barriers would be shown repeatedly leading to a misunderstanding that there are an enough number of safety measures. A new bowtie analysis method is proposed to describe an accident in multiple steps showing relations among causes or consequences. With causes and consequences shown in a format of a tree, the frequencies of having the top event (Fault tree analysis) and various consequences (Event tree analysis) are evaluated automatically based on the frequency of initiating causes and the probabilities of failure of barriers. It will provide a good description of the accident scenario and help the risk to be assessed transparently.

• The Journal of the Convergence on Culture Technology
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• v.8 no.5
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• pp.729-734
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• 2022

Various studies using accident cases are being conducted to identify the causes of accidents in the construction industry, but studies on the differences between public and private construction are insignificant. In this study, web scraping and text mining technologies were applied to analyze the causes of accidents by order type. Through statistical analysis and word cloud analysis of more than 10,000 structured and unstructured data collected, it was confirmed that there was a difference in the types and causes of accidents in public and private construction. In addition, it can contribute to the establishment of safety management measures in the future by identifying the correlation between major accident causes.

• Fire Science and Engineering
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• v.26 no.1
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• pp.38-42
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• 2012

Major industrial accidents such as fires, explosions and toxic releases have occurred in Ulsan, Yeosu petrochemical complex area every year. In this study, we analyzed the causes of the previous major accidents in order to provide reasonable measures for safety regulations and process safety management. Consequently, It is necessary to make constant revisions of safety regulations and to improve process safety management in other to prevent major industrial accidents in the petrochemical complex areas.

• Parasites, Hosts and Diseases
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• v.41 no.1
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• pp.1-16
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• 2003

Neospora caninum is a coccidian parasite of animals. It is a major pathogen for cattle and dogs and it occasionally causes clinical infections in horses, goats, sheep, and deer. Domestic dogs are the only known definitive hosts for N. caninum. It is one of the most efficiently transmitted parasite of cattle and up to 90% of cattle in some herds are infected. Transplacental transmission is considered the major route of transmission of N. caninum in cattle. Neospora caninum is a major cause of abortion in cattle in many countries. To elicit protective immunity against abortion in cows that already harbor a latent infection is a major problem. This paper reviews information on biology, diagnosis, epidemiology and control of neosporosis in animals.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2009.05b
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• pp.203-207
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• 2009

These days Construction Industry is one of the major industry in public project and it has many problems. And Construction Industry highly respond to a chage of IT, politics, economy, domestic and international situation. And it causes an uncertainty in Korea economy. The goal of this paper is showing the efficiency application of BIM in Public Project. And this paper follow three steps. First, these day's trend of BIM and delivery method are researched. Second, major factors are thrived to appreciating BIM Third, delivery method based on BIM is proposed. Major factors of delivery method are researched to make guide line of delivery method in public project in the future.

• Transactions of Materials Processing
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• v.11 no.8
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• pp.668-675
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• 2002

The circles deform into various shape during deformation, the major and minor axes of which indicate the direction of the major and minor principal strains. Likewise, the measured dimensions are used to determine the major and minor principal strain magnitudes. This circular grid technique of measuring strains can be used to diagnose the causes of necking and fracture in industrial practice and to investigate whether these defects were caused by material property variation, changes in lubrication, of incorrect press settings. In non-axisymmetric deep drawing, three modes of forming regimes are found: draw, stretch, plane strain. The stretch mode for non-axisymmetric deep drawing could be defined when the major and minor strains are positive. The draw mode could be defined when the major strain is positive and minor strain is negative, and plane strain mode could be defined when the major strain is positive and minor strain is zero. Through experiments the draw mode was shown on the wall and flange are one of a drawn cup, while the plane strain and the stretch mode were on the punch head and the punch corner area respectively, We observed that the punch load of elliptical deep drawing was decreased according to increase of die corner radius and the thickness deformation of minor side was more large than major side.

• Korean Journal of Health Education and Promotion
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• v.20 no.4
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• pp.51-65
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• 2003

Objectives： To examine the regional mortality differences in The Republic of Korea according to geographic location. Methods： All 232 administrative districts of the Republic of Korea in 1998 were studied according to their geographic locations by dividing each district into three categories； "metropolis," "urban," and "rural". Crude mortality rates for doth sexes from total deaths as well as the three major causes of death in Korea (cardiovascular disease, cancer, and external causes) were calculated with raw data from the "1998 report on the causes of death statistics" and resident registration data. Standardized mortality ratios (SMR) were calculated using the indirect standardization method. Poisson regression analyses were performed to examine the effects of geographic locations on the risk of death. To correct for the socioeconomic differences of each region, the percentage of old ($\geq$ 65 years old) population, the number of privately owned cars per 100 population, and per capita manufacturing production industries were included in the model. Results： Most SMRs were the lowest in the metropolis and the highest in the rural areas. These differences were more prominent in men and in deaths from external causes. In deaths from cancer in women, the rural region showed the lowest SMR. In Poisson regression analysis after correcting for regional socioeconomic differences, the risk of death from all causes significantly increased in both urban (OR＝1.111) and rural (OR＝1.100) regions, except for rural women, compared to the metropolis region. In men, the rural region showed higher risk (OR＝1.180) than the urban region (OR＝1.l51). For cardiovascular disease and cancer, significant differences were not found between geographic locations, except in urban women for cardiovascular disease (OR＝1.151) and in rural women for cancer (OR＝0.887), compared to metropolis women. In deaths from external causes, the risk ratios significantly increased in both urban and rural regions and an increasing tendency from the metropolis to the rural region was clearly observed in both sexes. Conclusions： Regional mortality differences according to geographic location exist in The Republic of Korea and further research and policy approaches to reduce these differences are needed. to reduce these differences are needed.

• The Journal of Internal Korean Medicine
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• v.12 no.1
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• pp.114-122
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• 1991

Hypertension is not the name of disease but that of syndrome, about which the record of causes and treatments did not exist in the classics. So I surveyed the oriental medical category of hypertension in the classics and studied on the causes and principal acupuncture points of treatment in the modern literature. And a result, I came to the following conclusion. 1. According to the category of hypertension in oriental medicine way, WIND(風), FIRE(火), PHLEGM(痰) were the evoked causes of hypertension. And the greater oart of hypertension's line in the classics was related to DIZZINESS(眩暈), APOPLEXY(中風), WIND OF THE LIVER(肝風). 2. There were exceedingly various causes such as inheritance, mind, emotion, change of nerve, other disease, etc. 3. In the treatment of acupuncture and moxibustion, there were Zusanli(足三里), Quchi(曲池), Fengchi(風池), Baihui(自會), Hegu(合谷), Sanyinjiao(三陰交), Taichong(太衝) which, 7 acupuncture points, showed high ratio. 4. According to the evoked causes, the major acupuncture points became to be different as follow; FIRE(火) : Neiguan(內關 ; P6) WIND(風) : Fengchi (風池 ; G20), Yanglingquan (陽陵泉 ; G34), Taichong(太衝 ; Liv3) PHLEGM(痰) : Zusanli(足三里 ; S36); Sanyinjiao(三陰交 ; Sp6). Basing on the Literature research, I have studied hypertension. I found that there were objective studies on the causes. But I couldn't find any objective study on the category of hypertension in oriental medicine way and the treatment of acupuncture and moxibustion. So I think that more profound study on the category and the interrelation between the acupuncture points of treatment and its dis tribution of the 14 meridians deserves to be continued from now on.