• 대한치과의사협회지
• /
• 제46권5호
• /
• pp.308-314
• /
• 2008

The risk of temporomandibular joint disorder (TMD) can be increased during dental treatment due to excessive mouth opening and change of occlusion. The aim of this study is to find the relationship between dental treatment and TMD in the patients who developed TMD after dental treatment. The subjects of this study were 21 patients, who developed TMD after dental treatment and were treated with active TMD therapy in Seoul National University Bundang Hospital from June 2003 to February 2007. The subjects were examined with preceding dental treatment, symptom, diagnosis, treatment method of TMD and prognosis of TMD. The obtained results were as follows. 1. Preceding dental treatments were : Implant treatment, 14 cases ; Tooth extraction, 3 cases and others. 2. TMD symptoms were : pain on TMJ, 12cases : Sound on TMJ, 3cases ; Mouth opening limitation, Headache and others. 3. Diagnoses of TMD were : Synovitis and/or capsulitis, 10 cases ; 8 cases of Internal derangement and others. 4. Most TMD were treated by stabilization splint. 5. Prognoses of TMD were : Improvement, 6cases ; sustained 11 cases. In conclusion, the risk of TMD is increased during implant treatment. Prognoses of TMD after dental treatment were bad. It might be that these patients were non-cooperative and have distrust of dental treatment. Because the overloading on TMJ is possible in dental treatment of patients with underlying TMD, prior explanation and knowledge TMJ treatment are very important in these cases.

• 산업공학
• /
• 제16권1호
• /
• pp.94-102
• /
• 2003

This study proposed a method to apply risk management standards to a product safety management program and reviewed cases where a risk management cycle is applied to the product safety management program. Comparing the four product safety management programs suggested by several authors yielded common features of the risk management cycle: (1) organization for product safety, (2) risk identification, (3) risk evaluation, (4) risk treatment, (5) monitoring/communication, and (6) documentation. A Japan company(Ricoh)'s case showed that the risk management cycle to treat product liability risks can be used as a successful product safety management program.

• 한국건설관리학회논문집
• /
• 제14권3호
• /
• pp.22-32
• /
• 2013

일반적인 사회기반시설물 자산관리 절차는 기존 자산의 명확한 정보획득, 서비스수준의 설정, 요구수준의 분석, 재정상태와 가용예산의 분석, 자산관리 계획의 준비, 수정된 자산의 정보 획득 순으로 구성될 수 있다. 본 연구에서는 실제적인 위험도분석 기반의 개선된 교량 자산관리를 위하여 필요한 상태평가 및 성능측정, 성능척도의 설정, 파손형태 및 위험도 분석 등에 대한 방법론을 제시하였다. 보다 효율적인 교량 관리를 위하여 위험도 고려가 필요한 교량 기본현황정보 및 성능척도 항목을 설정하였고, 정량적 정성적 위험도를 고려한 성능평가방법을 제안하였다. 위험정도와 발생가능성을 고려한 위험도 매트릭스를 이용한 성능평가방법은 교량의 서비스수준을 보다 합리적으로 추정할 수 있다. 제안된 위험도분석 절차와 방법이 접목된 교량 서비스수준 평가방법을 이용하면 보다 합리적인 자산관리 의사결정이 가능하며, 향후 최적의 유지관리 의사결정을 위한 자산관리 체계구축 및 시스템 개발에 기여할 수 있을 것으로 판단된다.

• Membrane and Water Treatment
• /
• 제8권2호
• /
• pp.137-147
• /
• 2017

A water treatment utility in South Korea operates a large system of pressurized hollow fiber membrane (PHFM) modules. The optimal selection of membrane module for the full scale plant was critical issue and carried out using Risk-based Life Cycle Cost (RbLCC) analysis based on the historical data of operation and maintenance. The RbLCC analysis was used in the process of decision-making for replacing aged modules. The initial purchasing cost and the value at risk during operation were considered together. The failure of modules occurs stochastically depending on the physical deterioration with usage over time. The life span of module was used as a factor for the failure of Poisson's probability model, which was used to obtain the probability of failure during the operation. The RbLCC was calculated by combining the initial cost and the value at risk without its warranty term. Additionally, the properties of membrane were considered to select the optimum product. Results showed that the module's life span in the system was ten years (120 month) with safety factor. The optimum product was selected from six candidates membrane for a full scale water treatment facility. This method could be used to make the optimum and rational decision for the operation of membrane water purification facility.

• 대한소아치과학회지
• /
• 제50권4호
• /
• pp.421-433
• /
• 2023

This study was to examine the developmental dental abnormalities in childhood cancer survivors. Risk factors were assessed for 125 children with radiographic data through a retrospective analysis of medical records and panoramic images. 68.0% of childhood cancer survivors exhibited at least one dental abnormality. The types of abnormalities varied depending on the age at cancer diagnosis and treatment intensity, ranging from microdontia (43.2%), to abnormal root development (39.2%) and tooth agenesis (33.6%). Logistic regression analysis demonstrated that a young age at diagnosis (under 3 years), the use of heavy metal agents, a history of hematopoietic stem cell transplantation (HSCT), and combination treatment of chemotherapy, radiation therapy, and HSCT were associated with a significantly higher risk for overall dental abnormalities. The increased risk ratios were 6.00, 3.06, 3.22, and 7.87, respectively (p < 0.05). The results of this study will predict dental abnormality in permanent dentition according to the diagnosis age and treatment method of childhood cancer.

• 보건행정학회지
• /
• 제32권4호
• /
• pp.380-388
• /
• 2022

Background: Emerging infectious diseases, such as Middle East respiratory syndrome or coronavirus disease 2019, pose a continuous threat to public health, making a risk assessment necessary for infectious disease control and prevention. Therefore, we aimed to investigate the risk assessment methods for infectious diseases used by major foreign countries and organizations. Methods: We conducted an investigation and comparative analysis of risk assessment and risk determination methods for infectious diseases. The risk assessment tools included the strategic toolkit for assessing risks, influenza risk assessment tool, pandemic severity assessment framework, and rapid risk assessment methodology. Results: The most frequently reported risk elements were disease severity, antiviral treatment, attack rate, population immunity, and basic productive ratio. The risk evaluation method was evaluated quantitatively and qualitatively by the stakeholders at each institution. Additionally, the final risk level was visualized in a matrix, framework, and x and y-axis. Conclusion: Considering the risk assessment tools, the risk element was classified based on the duplicate of each indicator, and risk evaluation and level of risk assessment were analyzed.

• Journal of Hospice and Palliative Care
• /
• 제4권2호
• /
• pp.122-129
• /
• 2001

배경 : 후천성 면역 결핍증이 치명적인 질환으로 알려진 이후 이에 대한 원인규명과 치료방법 그리고 전염을 막기 위한 노력과 연구들이 현재까지 계속 진행되고 있지만, 이 질환에 대한 치료방법이나 백신 개발은 아직까지 요원한 실정이다. 따라서 가장 좋은 치료는 예방이며, 올바른 예방법을 숙지하여 행하면 거의 100% 예방이 가능하다. 이에 저자 등은 매춘부와 성경험이 있는 고위험군과 매춘부와 성경험이 없는 저위험과의 지식과 태도 비교를 통해 효과적인 예방교육을 제시하고자 한다. 방법 : 2000년 1월 1일부터 6월 30일까지 현재 미혼인 군인과 대학생 516명을 대상으로 설문지를 통해 조사하였다. 응답된 자료를 고위험군과 저위험군 사이에서의 인구통계학적인 특징, 지식, 태도를 chi-square test를 가지고 비교 분석하였다. 또 두 군간의 지식 점수 비교는 one-way ANOVA test를 가지고 비교 분석하였다. 결과 : 미혼 남성 516명중 고위험군은 256명(49.6%), 저위험군은 260명(50.4%)이었으며, 후천성 면역 결핍증에 대해서 처음으로 듣는 시기는 두 집단 다 중학교 때가 제일 많은 것으로 나왔다. 이 질환에 대해 지식을 얻게 되는 주된 경로는 텔레비젼 방송으로 고위험군은 124명(48.4%), 저위험군은 167명(64.2%)로 나왔다(P=0.002). 지적 부분에서는 평균 점수가 총 20개 문항 중 고위험군은 $13.9{\pm}1.9$, 저위험군은 $14.1{\pm}1.8$이었고, 두 군간의 통계학적인 차이는 없었다(P=0.191). 저위험군이 고위험군보다 통계학적으로 의미가 있는 경우는 20개 항목 중 2개 항목으로 수혈을 통해 전염된다는 항목(P=0.014)과 모기를 통해 후천성 면역 결핍증 바이러스 균이 전염될 수 있다는 항목(P=0.009)이었다. 태도 부분에서는 환자를 다른 사람과 격리시켜야 된다는 항목에서만 통계학적으로 고위험군에서 저위험군보다 의미있게 높게 나왔다(P=0.029). 결론 : 본 연구에서 고위험군과 저위험군 모두 텔레비젼을 통해서 지식을 주로 습득하고, 지식과 태도 부분에서 일부분을 제외하곤 두 군간의 통계학적인 차이는 없었지만 지식부분은 2개 항목, 태도 부분은 1개 항목에서 저위험군이 고위험군보다 통계학적으로 높게 나왔다. 이는 지식이 높을수록 후천성 면역 결핍증에 노출 될 가능성을 낮출 수 있음을 시사하며, 감염될 가능성이 낮은 사람이 태도도 더 긍정적임을 알 수 있다.

• Proceedings of the National Institute of Ecology of the Republic of Korea
• /
• 제2권3호
• /
• pp.210-218
• /
• 2021

Recently, pest-resistant living modified (LM) crops developed using RNA interference (RNAi) technology have been imported into South Korea. However, the potential adverse effects of unintentionally released RNAi-based LM crops on non-target species have not yet been reported. Coccinella septempunctata, which feeds on aphids, is an important natural enemy insect which can be exposed to the double-stranded RNA (dsRNA) produced by RNAi-based LM plants. To assess the risk of ingestion of Snf7 dsRNA by C. septempunctata, we first identified the species through morphological analysis of collected insects. A method for species identification at the gene level was developed using a specific C. septempunctata 12S rRNA. Furthermore, an experimental model was devised to assess the risk of Snf7 dsRNA ingestion in C. septempunctata. Snf7 dsRNA was mass-purified using an effective dsRNA synthesis method and its presence in C. septempunctata was confirmed after treatment with purified Snf7 dsRNA. Finally, the survival rate, development time, and dry weight of Snf7 dsRNA-treated C. septempunctata were compared with those of GFP and vATPase A dsRNA control treatments, and no risk was found. This study illustrates an effective Snf7 dsRNA synthesis method, as well as a high-concentration domestic insect risk assessment method which uses dsRNA to assess the risk of unintentional released of LM organisms against non-target species.

• Journal of Korean Biological Nursing Science
• /
• 제18권4호
• /
• pp.193-202
• /
• 2016

Purpose: The study was to analyze clinical outcomes and risk factors of for complications associated with the hip fracture surgery in the elderly before and after interdisciplinary treatment. Methods: A retrospective method was used to investigate the general and therapeutic characteristics, frequency of complications and clinical outcomes. The subjects of the study were 553 patients who underwent hip fracture surgery from January, 2009 to December, 2014. Results: The interdisciplinary group was older and less likely to walk independently even before the fracture than a usual care group. The incidence of complications was higher in the interdisciplinary group than the usual care group. The prevalence of complications in both groups was 66.5%. Multivariate logistic regression analysis showsed that the risk factors for complications of hip fracture surgery were as follows: advanced age, stroke, Parkinson disease, time interval from emergency room to operation, pre & post ambulatory status, American Society of Anesthesiologists (ASA) classification quality of postop intensive care unit (ICU) care and foley indwelling. Conclusion: This study has implications in that it recognized the necessity for interdisciplinary treatment and provided the basic base data for nursing intervention of the elderly patients who underwent hip fracture surgery.

• 실내환경 및 냄새 학회지
• /
• 제17권4호
• /
• pp.322-329
• /
• 2018

The objective of this study is to identify the research trend in the field of indoor environment in Korea. We collected 419 papers published in the Journal of the Korean Society for indoor environment between 2004 and 2018, and attempted to produce datasets using a topic modeling technique, Latent Dirichlet Allocation(LDA). The result of topic modeling showed that 8 topics ("VOCs investigation", "Subway environment", "Building thermal environment", "School health", "Building particulate matter", "Asbestos risk", "Radon risk", "Air cleaner and treatment") could be extracted using Gibbs sampling method. In terms of topic trends, investigation of volatile organic compounds, subway environment, school health, and building particulate matter showed a decreasing tendency, while the building thermal environment, asbestos risk, radon risk, air cleaners, and air treatment showed an increasing tendency. The results of this topic modeling could help us to understand current trends related indoor environment, and provide valuable information in developing future research and policy frameworks.