• Journal of the Korean Society for Nondestructive Testing
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• v.27 no.2
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• pp.142-147
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• 2007

In order to measure corrosion level of steel reinforcement rebar which is inside reinforced concrete structure, infrared thermographic technique was employed. Experimental test parameters were four different ambient temperatures and various levels of corrosion states (0, 1, 3, 5, 7 and 10% of weight loss). After analysis of temperature distributions of concrete surface, the amount of heat flux from the concrete surface is directly proportional to the corrosion level which is inside of concrete.

• Korean Journal of Environmental Biology
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• v.38 no.3
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• pp.333-342
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• 2020

The aim of this study was to define the toxic effects of phenanthrene (PAHs) on the fertilization and normal embryogenesis rates in the two species of sea urchin (Hemicentrotus pulcherrimus and Mesocentrotus nudus). The sperm and fertilized eggs of both sea urchin species were exposed to serial dilutions of phenanthrene for 10 min and 48 hours, respectively. The fertilization rate and normal embryogenesis rate of H. pulcherrimus and M. nudus were decreased in a concentration-dependent manner. The EC₅₀ for the fertilization rate of H. pulcherrimus and M. nudus was 17.48 mg L^-1 and 16.21 mg L^-1, and the EC₅₀ for the normal embryogenesis rate was 2.99 mg L^-1 and 0.36 mg L^-1, respectively. Between the two species, H. pulcherrimus was more sensitive to phenanthrene exposure, and 48 h normal embryogenesis was the more sensitive endpoint. Therefore, the results of this study demonstrated that the exposure of both sea urchin species to phenanthrene caused alterations in egg fertilization and the early developmental stages.

• The Korean Journal of Applied Statistics
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• v.31 no.4
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• pp.529-538
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• 2018

Tuberculosis causes high morbidity and mortality. However, Korea still has the highest tuberculosis (TB) incidence and mortality among OECD countries despite decreasing incidence and mortality due to the development of modern medicine. Korea has now implemented various policy projects to prevent and control tuberculosis. This study analyzes the effects of public-private mix (PPM) tuberculosis control program on treatment outcomes and identifies the factors that affecting the success of TB treatment. We analyzed 130,000 new tuberculosis patient cohort from 2012 to 2015 using data of tuberculosis patient reports managed by the Disease Control Headquarters. A cumulative incidence function (CIF) compared the cumulative treatment success rates for each factor. We compared the results of the analysis using two popular types of competition risk models (cause-specific Cox's proportional hazards model and subdistribution hazard model) that account for the main event of interest (treatment success) and competing events (death).

• Korean journal of aerospace and environmental medicine
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• v.29 no.3
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• pp.96-100
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• 2019

The present study analyzed all of exotic malaria (EM) cases reported in the Republic of Korea (Korea) and Japan from 2015 to 2017 to assess the trends of incidence overtime to review the risk factors for travelers visiting malaria-endemic countries. We investigated 162 cases of EM in Korea with a cumulative incidence rate (CIR) of 0.105 per 100,000 populations nationwide and the CIR of the oversea travelers was 0.238 per 100,000 travelers, respectively. During the same period in Japan, 152 cases of EM in nationwide with a CIR of 0.041 and in the oversea travelers with a CIR of 0.297 were observed. When compared, the CIR of EM in nationwide was much higher than that in Japan (P<0.01), but a CIR of imported by travelers in Korea was lower than that in Japan (P<0.01).

• The Monthly Diabetes
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• s.216
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• pp.14-18
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• 2007

국내의 질환별 사망률에 대한 보고를 참조하면, 뇌졸중은 암에 이어서 높은 사망률을 보이는 질환이며, 단일 질환으로는 가장 높은 사망률을 보인다. 뇌졸중은 높은 사망률을 나타내는 문제 외에도 후유증으로 심한 장애를 남길 수 있다. 그러므로 고령화 사회로 접어들고 있는 우리나라의 상황을 고려할때 뇌졸중은 치매와 더불어서 주요한 노인 질환일 뿐만 아니라, 뇌졸중이 발생하게 되면 후유증으로 장애가 남는 경우가 많으므로 지속적으로 환자의 가족과 주변에 대한 사회적 부담을 가중 시키는 문제를 불러온다.

• Journal of the Korean Society of Radiology
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• v.85 no.2
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• pp.363-371
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• 2024

Purpose Acute cholecystitis is a complication of transarterial chemoembolization (TACE) that occasionally requires surgical intervention. We aimed to analyze the incidence and risk factors of cholecystitis requiring surgical intervention in patients with embolic material uptake on cone beam CT (CBCT) performed immediately after various TACE procedures. Materials and Methods After a retrospective review of 2633 TACE procedures performed over a 6-year period, 120 patients with embolic material retention in the gallbladder wall on CBCT immediately after TACE were selected. We analyzed the incidence of and risk factors for acute cholecystitis. Results The overall incidence of acute cholecystitis requiring surgical intervention was 0.45% (12 of 2633 TACE procedures); however, it was present in 10% (12 of 120) of procedures that showed high-density embolic material retention in the gallbladder wall on CBCT performed immediately after TACE. Acute cholecystitis requiring surgical intervention occurred in eight patients (66.7%) who underwent direct cystic arterial embolization. Surgical intervention was performed 15 days (mean) after TACE. Conclusion Most unintended chemolipiodol deposits in the gallbladder wall resolved without intervention or surgery. However, superselective direct cystic arterial chemoembolization was associated with a high incidence of acute cholecystitis requiring surgery, and patients who undergo this procedure should be closely monitored.

• The Journal of the Korean dental association
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• v.47 no.10
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• pp.628-636
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• 2009

낭은 상피세포로 싸여있는 병적인 공간으로 내부가 액체나 반액체로 채워져 있다. 악골에서 낭은 다른 골 부위에서보다 더 흔하게 발생하는데 이는 대부분의 낭이 치아 형성 후에 악골에 남아있는 치성잔류물로부터 발생하는 경우가 많기 때문이다. 구강악안면부에서 발생하는 낭은 연조직에서 발생할 수도 있지만 대부분 골내에서 발생하고, 법랑질 상피나 치배와 관련해 악골내에 발생하는 치낭성이다. 치낭성은 WHO분류에서 발생근원에 따라 크게 염증성과 발육성 기원의 두 가지 군으로 분류되고, 발육성 낭은 치성과 비치성으로 세분할 수 있다. 악골에 발생하는 낭은 대부분이 치낭성이며 가장 흔한 악골 낭종은 치근단낭으로 염증성이고, 발육성인 함치성낭과 치성각화낭도 다음으로 발생률이 높은 편이다. 소아환자에서 함치성낭과 치성각화낭의 발병률이 성인보다 더 높았다. 비치성낭 중에서 비구개관낭이 가장 많이 발생하며, 연조직에서 발생하는 낭과 상피세포 경계가 없는 낭성 병소인 가성낭(pseudocyst)은 드물게 관찰된다. WHO에서 치성각화낭과 서회화치성낭은 파괴적 성장을 하고 재발 경향이 높으므로 양성 낭성 종양으로 재분류하고 있다.

• 대한예방의학회:학술대회논문집
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• 2005.10a
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• pp.320-320
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• 2005

• 월간산업보건
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• s.342
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• pp.58-62
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• 2016

• 대한생식의학회:학술대회논문집
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• 2004.11a
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• pp.34-34
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• 2004