• Journal of the Korea Concrete Institute
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• v.18 no.2 s.92
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• pp.213-218
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• 2006

Meniscus, adsorbed layer thickness, capillary pressure and disjoining pressure was deduced in extended meniscus region in cement paste pore by hydrostatic equilibrium. From the results, the relationship between pore size and adsorbed layer thickness could be derived and adsorbed layer thickness represents $0.299{\sim}2.700nm$ according to pore size $1nm{\sim}1{\mu}m$. Especially, disjoining pressure rapidly Increased in less than 10 nm pore size according to adsorbed layer thickness. Therefore, it is interpreted that autogenous shrinkage of cement paste is highly increases in formation of less than 10 nm pore size. Predictions of autogenous shrinkage in cement paste considering driving force for autogenous shrinkage with capillary pressure and disjoining pressure was low in comparison with experiment values between $1{\sim}4$ days and high in later period. These tendency could be thought that pore damage by mercury injection in early age makes shrinkage driving force underestimate and assumption for unsaturated independent pore makes overestimate. These interactions might be needed corrections considering on hydration or pore replacement model.

• Convergence Security Journal
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• v.17 no.2
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• pp.109-118
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• 2017

The study examines whether there is support for undergraduate students of Department of NCOs leadership needs and self-perceived any casualty, the purpose being placed to identify the cause-and effect relationship between student's behavior and these self-appointed leadership needs parameters. To study this end, the men and women college students Military major in Busan district using the convenience of the student sample extraction to extract the 362 students. Setting the model to achieve the object of the study, and then through a structural equation model (SEM) were studies a causal relationship among variables. Result on the basis of the research study model verification method as described above what is derived from this study were as follows. First, self-leadership is confirmed in the career planning of clarity on the impact of career beliefs centered strategies(+) target-oriented strategy(+), and independent self-reliance, check-centered strategies(+), constructive thinking strategies(+), ERA=centric strategy(+), in the natural course flexibility, compensation strategies(+), constructive thinking strategies(+) improve professional skills appeared to affect the check-centered strategies(+), ERA-centered strategies(+). Second, self-leadership is general satisfaction at the impact of major satisfaction natural reward strategies(+), the curriculum meets the natural reward strategies(+) target-oriented strategy(+) recognition satisfy the natural reward strategies(+) target-oriented strategy(+) appeared to affect this. Third, career beliefs Major General satisfaction in the impact on satisfaction Career Planning Clarity(+), an independent self-reliance(+), career flexibility(+)improve professional skills(+), the curriculum satisfies independent self-reliance(+), career flexibility(+) improve professional skills(+), the self-satisfied recognized independent trust(+), career flexibility(+), career planning clarity(+) it appeared to influence this.

• Fire Science and Engineering
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• v.31 no.3
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• pp.119-126
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• 2017

This study is to improve fire-fighter's mental health by examining the relationship between fire-fighter's resilience and PTSD. The research question of the present study are follows. First, is there any relationship between fire-fighter's demographics and PTSD. Second, is there any relationship between fire-fighter's demographics and resilience. Third, is there any relationship between fire-fighter's resilience and PTSD. The instruments for collecting data of the study were KRO-53 and IES-R-K. These tests were administrated to all of the subjects of the study. The results of the study are as follows. First, fire-fighter's demographics except for department have an influence on PTSD. Second, fire-fighter's counselling experience has an influence on resilience. Third, fire-fighter's resilience has an influence on PTSD. Specially, self-regulation of resilience subtypes has an influence on PTSD. From the above results, The study proposed the following; to prevent PTSD, It is necessary to have specific working system, have specific counseling system, consider individual resilience in selecting fire-fighter and placing department.

• Journal of agricultural medicine and community health
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• v.47 no.2
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• pp.78-89
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• 2022

목적: 이 연구는 2019학년도 역학조사관 입문교육 과정에 참여한 29명의 수습과정생에게 참여형 자기주도 학습 역학조사관 연수 프로그램(FETP)의 효과와 만족도 등 역량 변화를 분석해 그 결과를 향후 과정 개발의 참고 자료로 활용하고자 하였다. 방법: 교육 프로그램의 만족도와 교육 후 모듈에 대한 역량 변화를 평가하는 연구가 수행되었다. 만족도와 역량의 차이 비교는 크루스칼 왈리스 검정(Kruskal-Wallis test)를 실시하였고, 역량의 차이는 윌콕슨 부호순위검정(Wilcoxon signed rank test)에 의해 이루어 졌다. 결과: 2019년 FETP에 참여한 역학조사관 중 여성은 48.3% 였으며, 40세 미만은 9.4% 였다. 역학조사관 입문교육과정 모듈(역학조사, 보건통계 및 정보통계, 감염병 국가 체계, 감염병 질환 감시 체계, 진단 및 실험실 검사, 생물 안전 및 관리, 주요 감염성질환 관리와 조사, 커뮤니케이션, 협동과 리더십, 일반과정)별 만족도는 실무적 도움, 전문성, 기능, 태도 등에서 4점(5점 만점)을 초과하였고, 전체 4.2±0.21(5점 만점)점으로 높은 수준이였다, 모듈의 교육훈련 전후 평균 점수는 2.25±0.91, 3.68±0.63점 등으로 유의한 향상이 있었으며, 모든 모듈 및 하위 주제들도 유의한 향상이 있었다(p<0.001). 그 중에서 현장역학조사 경험이 가장 높은 변화가 있었고, 표본 수집과 실무가 가장 낮은 역량 변화가 있었다. 결론: 2019년 진행된 입문교육 과정은 수료 후 학생들의 역량은 개선되었고, 만족도는 높은 편이었다. 참여형 자기주도학습의 촉진은 역량을 향상시킬 뿐만 아니라 보건 종사자들의 자신감을 높일 수 있었다.

• Clinical and Experimental Pediatrics
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• v.49 no.12
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• pp.1363-1366
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• 2006

Aneurysmal dilatation of the ductus arteriosis has been considered a rare but potentially fatal abnormality. The mechanism of ductal aneurysmal formation remains uncertain. Plain chest radiography has proven helpful in the diagnosis of ductus arteriosus aneurysm (DAA), before the application of transthoracic echocardiography. The transthoracic echocardiography is an important tool for the diagnosis and follow-up of DAA. We present a case of congenital ductus arteriosus aneurysm in a newborn, that was an incidental discovery. The diagnosis was made by echocardiography, three-dimensional surface rendering computed tomography (CT), and spontaneous regression after four weeks of follow-up.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.11C
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• pp.694-701
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• 2011

This paper addresses a synchronization technique based on an adaptive combining of the sub-correlation functions obtained from multiband sine phased binary offset carrier (BOC) signals, allowing a BOC signal receiver to deal with multiband sine phased BOC signals. Specifically, we first obtain the sub-correlation functions composing the BOC autocorrelation function, and then, re-combine the sub-correlation functions generating a correlation function with no side-peak. Finally, by replacing the BOC autocorrelation with the correlation function with no side-peak in the delay lock loop, the proposed scheme performs unambiguous signal tracking. The proposed synchronization scheme is applicable to generic sine phased BOC signals. Numerical results demonstrate that the proposed scheme provides a performance improvement over the conventional unambiguous schemes in terms of the tracking error standard deviation.

• The Journal of the Korea Contents Association
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• v.12 no.2
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• pp.292-300
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• 2012

This study was carried out in order to verify the influence that social welfare trust organizational culture and level of empowerment. The study object 656 copies of guns were used to analysis to social worker engaged in to the community welfare agency, old man welfare agency, disabled welfare agency which was social welfare use facilities. Organizational culture and empowerment as it was for an independent variable analyzed correlation to trust and executed regression analysis to grasp a degree of an influence to be mad to trust. Research result, first, Organizational culture appeared to what I affected to trust social group culture, development cultural artist and second, Level of empowerment of social worker appeared to what I affected to trust own a task meaning result and self-determination. There's social welfare is organized in order to improve social welfare gratitude confidence, and it is group culture and development culture, and an level of empowerment to recognize a social welfare private house gives meaning anger to a task and self-determination had to heighten it.

• Journal of the Korean Society of Hazard Mitigation
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• v.7 no.3
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• pp.19-31
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• 2007

Humidity and strain were estimated for understanding the relation between humidity change by self-desiccation and shrinkage in high-performance concrete with low water binder ratio and containing fly ash and blast furnace slag. Internal humidity change and shrinkage strain were about 10%, 10%, 7%, 11%, 11% and $320{\times}10^{-6}$, $270{\times}10^{-6}$, $231{\times}10^{-6}$, $371{\times}10^{-6}$, $350{\times}10^{-6}$ respectively on OPC30, O30F10, O30F20, O30G40, O30G50 and from the results, fly ash made humidity change and strain decrease but slag increase comparing with ordinary portland cement. Considering only relation internal humidity and shrinkage by self-desiccation, humidity change and shrinkage represented the strong linear relation regardless of mineral admixture. For specifying the relation on internal humidity change and autogenous shrinkage strain, shrinkage model was established which is driven by capillary pressure in pore water and surface energy in hydrates on the assumption of a single network and extended meniscus in pore system of concrete. This model and experimental results had a similar tendency so it would be concluded that the internal humidity change by self-desiccation in HPC originated in small pores less than 20nm, therefore controlling plan on autogenous shrinkage might be focused on surface tension of water and degree of saturation in small pore.

• Journal of the Korean Society of Radiology
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• v.83 no.6
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• pp.1360-1365
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• 2022

Hutchinson-Gilford progeria syndrome (HGPS) is a rare, progressive, premature aging syndrome with early morbidity due to cardiovascular and cerebrovascular diseases. Clinical symptoms are very diverse, including non-specific symptoms such as growth retardation, scleroderma, alopecia, and osteoporosis, as well as hypertension and cardiovascular diseases that occur in childhood and adolescence due to accelerated vascular aging. In patients with HGPS, MR angiography is recommended for early diagnosis of asymptomatic stroke or vascular changes and to assess increased risk of cerebrovascular disease. We report the second domestic case of HGPS confirmed by genetic analysis in a 5-year-old child with typical clinical features, and the first English case report in Korea to present brain MR angiography findings.

• Journal of radiological science and technology
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• v.31 no.4
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• pp.323-327
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• 2008

Porcelain gallbladder is a rare disorder by deposition of calcium in the wall of gallbladder. The chronic cholecystitis is reported to produce mural calcification and obstruction to the cystic duct by stone. Since porcelain gallbladder is commonly associatedwith gallbladder cancer, cholecystectomy is prerformed to prevent it. We report here a case of a patient with porcelain gallbladder. This case showedthe typical ultrasonogaphic, computer tomogaphic and radiaographic findings of the disease.