• Computers and Concrete
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• v.7 no.6
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• pp.523-532
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• 2010

If an infill wall in a reinforced concrete frame is shorter than the column height and there is no initial gap between the column and the infill wall, the short column effect can occur during an earthquake shaking. This form of damage is frequently observed in many earthquake-damaged buildings all around the world and especially in Turkey. In this study, an effective method, which consists of placing additional infill wall segments surrounding the short column, to prevent this type of failure is examined. The influence of adding infill wall in the reduction of the shear force in the short column is also investigated. A parametric study is carried out for one-storey infilled frames with one to five bays using the percentage of the additional infill wall surrounding the short column and the number of spans as the parameters. Then the investigation is extended to a case of a multistorey building damaged due to short column effect during the 1998 Adana-Ceyhan earthquake in Turkey. The results show that the addition of the infill walls around the potential short columns is an effective way to significantly reduce the shear force.

• Proceedings of the Korea Concrete Institute Conference
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• 1997.10a
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• pp.749-754
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• 1997

Nowadays domestic building market has undergone several changes. Labor costs are too high and materials are in short supply. These raised building costs and therefore lowered productivity. At this point it is the best way to reduce manual labor and find alternative materials that can improve productivity. In the building process form work take the most part of it. So many formwork systems were developed to reduce the construction period and labor cost. But their technical improvements just limited to adjust form shape-the role of form is not changed. This research developed a new formwork systems that can function to unify or minimze the unit process with cast-in-place type permanent form. In former study (reported in '97 spring seminar), we did the assembling test with column and beam clamps. Furthermore, In this paper, we examined the total systems of form erections and evaluated the structural performances.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.05a
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• pp.12-13
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• 2013

Free-form building is increasing because of request that an order to raise the value and request of the local residents and the government trying to own iconic and beautiful buildings. In addition, the installation and production of free-form concrete segment are now available because of development of construction technology, such as the development of materials and equipment. However, the production of free-form concrete segment requires a lot of time and manpower than shaping. In particular, resources of the mold for the production of free-from segment will be invested excessively because mold can not be recycled. Thus, the problems of increased costs, construction periods and loss of productivity occur. To solve these problems, this study proposes a technique of making the mold of for variable within a short time. Technique proposed in this study can be recycled die and will realize fast and accurate free-form concrete segment.

• The Journal of Korean Obstetrics and Gynecology
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• v.29 no.3
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• pp.110-120
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• 2016

Objectives: The object of this study is to report a clinical effect of oriental medical treatments with Chuna for acute low back pain during the early stages of pregnancy.Methods: The patient in this case, 31 years-old female was admitted for 1days (20th/June/2016-30th/June/2016) due to the acute low back pain on the 7 weeks of pregnancy. We diagnosed as 挫閃腰痛, 傷筋 (Sprain and strain of lumbar spine) and treated with Chuna therapy and other conservative treatments including acupuncture herbal mixture. And we measured Visual Analog Score (VAS), Oswestry disability index (ODI), McGill pain questionnaire-short form (SF-MPQ).Results: After treatments, Visual Analog Score (VAS), Oswestry disability index (ODI), McGill pain questionnaire-short form (SF-MPQ) were significantly improved in case.Conclusion: Oriental medical treatments with Chuna manual therapy were associated with improvement of acute low back pain during the early stages of pregnancy.

• Korean Journal of Child Studies
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• v.30 no.6
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• pp.583-590
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• 2009

This study analyzed temperament of ethnic Korean children residing in Korea comparing them with Korean children and American children residing in the USA. Parents of 169 Korean, Korean-American and American 4-7-year-old children rated them on the Very Short Form of Children's Behavior Questionnaire (CBQ; Rothbart et al., 2001). On most subscales, Korean children were reported higher than ethnic Korean children in the US while Korean-American children were rated lower than others. Attention focusing was influenced by macro systems; shifting and impulsivity were more sensitive to biological or micro systems. The bilingual setting of Korean-American children may explain the difference in control of this group from others. This study clearly showed that ecological settings play important roles in temperament.

• Korean Journal of Childcare and Education
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• v.14 no.1
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• pp.187-202
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• 2018

Objective: The study aims to examine fathers' parental stress and the variables effecting parental stress of fathers with infants. Methods: One hundred seventeen fathers with 0 to 2 year-olds were recruited from daycare centers in Daejeon metropolitan city. The Korean version of the Parenting Stress Index Short Form (K-PSI-SF) by Lee, Jung, Park and Kim(2008), The Korean Occupational Stress Scale-Short Form (Koss-SF) by Jang and Ko(2005), and the Revised-Kansas Marital Satisfaction Scale(RKMSS) by Chung (2004) were used to measure fathers'parental stress, occupational stress, and marital satisfaction. Results: First, the most influential variable that affected father's parental stress was their marital satisfaction. The fathers felt less parental stress when they felt higher marital satisfaction. Second, fathers felt less parental stress when their occupational environments were family friendly. Conclusion/Implications: Ways to improve mariatal satisfacation and a family friendly evironment at work should be sought out in order to lessen the parental stress of fathers raising infants.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.15 no.1
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• pp.9-14
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• 1990

In this paper, I derived a two-dimensional analytical closed-form expression of the threshold voltage for small size MOSFET. The invalid assumptions of constant surface portential or uniform depletion depth were corrected. A comparison between the results of pre-models analyses and the present's proved that this paper's model is quite accurate. Therefore, this model will become a useful design tool for short channel MOSFET.

• Journal of the Korean Society of Safety
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• v.26 no.6
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• pp.79-84
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• 2011

There have been so many studies related to job stress or musculoskeletal disorders(MSDs) in the shipbuilding industry. However, study of employee performance evaluation that reflect on the industrial features of the deckhouse manufacturing industry has not been established. Therefore, this study aimed to evaluate workers' job stress and work ability through statistical significance tests according to age, work types, years of service, work forms and sex. For this, the study conducted a job stress test using the Korean Occupational Stress Questionnaire Short Form, and employee performance evaluations using the Work Ability Index(WAI) of the Finnish Institute of Occupational Health (FIOH) on 536 workers in the deckhouse manufacturing industry. MINITAB statistics program was used for statistics analysis and significance was verified with the Kruskal-Wallis test, a corporate body of nonparametric statistical analysis. As a result, employee performance had significant differences, depending on age, work types, years of service and sex, and job stress also depended on the number of service year and work form. Additionally, it was found that employee performance decreased more as job stress increased.

• Korean Journal of Hydrosciences
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• v.6
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• pp.13-22
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• 1995

The augmenting hydrologic data using a correlation procedure has been used to improve the estimates of the mean and variance at the site of interest with short record when one or more near by sites with longer records are available. The variance of the unbiased maximum likelihood estimator of $ derived by Moran based on the multivariate normal distribytion is modified into the form of Matalas and Jacobs for the biveriate normal distribution to get the critical minimum values of the multiple correlation coefficient which give the improvement for estimating the variance at the site of interest. Those values are tabulated for various lengths of short records and the number of sites.

• Journal of the Mineralogical Society of Korea
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• v.9 no.2
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• pp.64-70
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• 1996

Early weathering products of anorthosite were investigated by using scanning electron microscopy in order to trace the development of halloysite particles and aggregates. Tiny short tubes or spheres precipitate on the plagioclase surface in the initial stage of weathering and form the compact globular aggregates. With continued growth, several globules are coalesced into wrinkled halloysite aggregates, and short tubes or spheres in globules grow into long tubes forming sheaf-like aggregates. Particle shape of halloysite varies with changing supersaturation degree of weathering solution, and determines the morphology of halloysite aggregates.