• 지역사회간호학회지
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• 제32권1호
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• pp.107-115
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• 2021

Purpose: The purpose of this study is to identify factors associated with smoking relapse within six months after quit attempts among workers in small and medium-sized enterprises in South Korea. Methods: The analysis was conducted for a total of 194 people who attempted to quit smoking by applying for a smoking cessation support service at the Regional Tobacco Control Center. The data used in the study were extracted from the Smoking Cessation Service Integrated Information System. Kaplan-Meier estimator and Cox proportional hazards regression model were used to identify variables associated with smoking relapse within six months' time period. Results: Smoking relapse rate within six months was 66.0%, and variables associated with relapse included the cases such as carbon monoxide (CO) at the time of registration (HR: 2.15, 95% CI: 1.10~4.22 for CO ≥20 ppm or more vs.CO <10 ppm), the average number of cigarettes smoked per day (HR: 1.04, 95% CI: 1.00~1.07), and the number of counseling(HR: 0.60, 95% CI: 0.54~0.67). Conclusion: Smoking characteristics and counseling showed one of the strongest correlations with relapse within six months. This implies that it is necessary to understand the smoking characteristics and patterns of workers and to provide continuous smoking cessation counseling tailored to individual characteristics for effective smoking relapse prevention.

• International Journal of Control, Automation, and Systems
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• 제1권2호
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• pp.229-235
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• 2003

We designed a family of completely autonomous mobile robots with local intelligence. Each robot has a number of on-board sensors, including vision, and does not rely on global positioning systems The on-board embedded controller is sufficient to analyze several low-resolution color images per second. This enables our robots to perform several complex tasks such as navigation, map generation, or providing intelligent group behavior. Not being limited to playing the game of soccer and being completely autonomous, we are also looking at a number of other interesting scenarios. The robots can communicate with each other, e.g. for exchanging positions, information about objects or just the local states they are currently in (e.g. sharing their current objectives with other robots in the group). We are particularly interested in the differences between a behavior-based approach versus a traditional control algorithm at this still very low level of action.

• Radiation Oncology Journal
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• 제6권1호
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• pp.23-33
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• 1988

A rerospective review of fifty patients with carcinoma of hypopharynx treated with $RT{\pm}surgery$ was studied for eleven-year period from 1974 to 1984. Of the 50 patients,46 were pyriform sinus in origin, 4 were posterior pharyngeal wall. Eighty-eight percent of patients were locoregionally advanced(stage III, IV) and 78% of patients presented conical lymphadenopathy. 5-year disease-free survival rate of the pyriform sinus ca. was $25.4\%$ in RT alone group, $80\%$ in combined modality group and $30.6\%$ in overall. Local control rate with RT alone in early stage (II) was excellent $(100\%)$, however combined modality appears to be better for local control$(80\%)$ in advanced stage (III, IV) as compared with that of RT alone group $(32\%).$ On basis of this study, RT alone is effective in terms of local control and functional preservation in treatment of early stage of pyriform sinus ca. while surgery can be reserved for salvage purpose when RT fails and combined modality is recommended in patients with locally advanced stage for better local control and survival.

• Radiation Oncology Journal
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• 제16권4호
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• pp.447-454
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• 1998

목적 : 국소 제어율과 생존율, 여러 예후인자 및 국소실패의 원인을 분석하므로 식도암의 수술 후 방사선 치료에 기본 자료로 활용하고자 한다. 대상 및 방법 : 1988년 1월부터 1995년 12월까지 본원에서 수술을 시행 후 40Gy 이상의 방사선 치료를 받은 국소적으로 진행된 식도암 환자 82명을 대상으로 후향적 분석을 하였다. 수술 후 병기는 II가 26례, IIB가 4례, III가 52례 였으며 수술후 병리학 소견으로 편평상피암 77례, Adenosquamous 3례, 선암 2례였다. 수술 후 외부 방사선 치료로 41Gy에서 64.8Gy(중간값 50.4Gy)를 조사하였다. 5례에서 PFC 항암화학요법을 시행하였다. 결과 : 총 환자의 2년 생존율 및 2년 국소제어율은 각각 36.8$\%$ 및 30.4$\%$이며 5년 생존율 및 5년 국소제어율은 각각 9.3$\%$ 및 26.3$\%$이다. 수술 후 병기에 따른 2년 생존율은 IIA가 50.2$\%$, IIB가 0$\%$, III가 23.3$\%$이었다(p=0.004). 2년 국소제어율은 IIA가 49.2$\%$, IIB가 66.6$\%$, III가 24.7$\%$(p=0.01) 이었다. 추적기간중 전체환자의 73.2$\%$인 60례에서 재발이 관찰되었다. 이중 원발병소인 식도에서 재발이 3례, 주위임파절 재발이 23례, 원발병소와 임파절에 함께 재발된 경우가 4례, 원발 병소재발 및 원격전이 재발이 1례, 주위임파절과 원격전이 재발이 9례, 원격전이 재발이 17례였다. 3례에서 재발 부위를 알수 없었다. 생존율에 관련된 예후인자로 흡연유무(p=0.02), 1 병기(p=0.0092), N병기(p=0.0045)가 통계적으로 의미있었다. 국소제어율에 관련된 예후인자로 T 병기(p=0.019), N 병기(p=0.047)가 통계학적으로 의미있었다. 결론 : 수술 후 방사선치료를 시행하여도 국소실패가 여전히 중요 실패 원인이었다. 국소 실패의 원인 중 식도 주위 임파절에 의한 실패가 원발 병소 실패보다 휠씬 높았다. 따라서 수술후 방사선치료에서 림프절에 대한 적절하고 적극적인 치료 전략이 필요하겠다.

• Steel and Composite Structures
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• 제34권1호
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• pp.1-15
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• 2020

This paper presents experimental and numerical studies on effects of local damages on the in-plane elastic-plastic buckling and strength of a fixed parabolic steel tubular arch under a vertical load distributed uniformly over its span, which have not been reported in the literature hitherto. The in-plane structural behaviour and strength of ten specimens with different local damages are investigated experimentally. A finite element (FE) model for damaged steel tubular arches is established and is validated by the test results. The FE model is then used to conduct parametric studies on effects of the damage location, depth and length on the strength of steel arches. The experimental results and FE parametric studies show that effects of damages at the arch end on the strength of the arch are more significant than those of damages at other locations of the arch, and that effects of the damage depth on the strength of arches are most significant among those of the damage length. It is also found that the failure modes of a damaged steel tubular arch are much related to its initial geometric imperfections. The experimental results and extensive FE results show that when the effective cross-section considering local damages is used in calculating the modified slenderness of arches, the column bucking curve b in GB50017 or Eurocode3 can be used for assessing the remaining in-plane strength of locally damaged parabolic steel tubular arches under uniform compression. Furthermore, a useful interaction equation for assessing the remaining in-plane strength of damaged steel tubular arches that are subjected to the combined bending and axial compression is also proposed based on the validated FE models. It is shown that the proposed interaction equation can provide lower bound assessments for the remaining strength of damaged arches under in-plane general loading.

• 수산해양교육연구
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• 제28권2호
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• pp.473-488
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• 2016

The purpose of this study is to present as an alternative to a new policy of the regional level about actively adopting of the Sharing Culture and to suggest policy direction of Talent Sharing activities as an intermediary Sharing activities. To achieve this, We derive a significant outcomes as compared mutual to the center of a volunteer manager and volunteer groups for talent sharing activities in Busan Area. As a result, several suggestion are presented as follow : First, we needed to build for systematic control of talent sharing activities around existing volunteer management institution. Second, Supply and Demand control system is needed to build for talent sharing activities at the local government dimension. Third, To reflect the trend of the people watching the activity with some degree of talent, expertise as a talent sharing activity, Talent sharing volunteers are needed for specialized capability verification. Finally, Sharing activities are needed to settle major policy for the systematic management of talent sharing activity and to expanded budget support of local government at the local government dimension.

• 한국구조물진단유지관리공학회 논문집
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• 제11권5호
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• pp.181-188
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• 2007

본 연구에서는 원형강관 가새의 국부좌굴에 의한 내력감소를 배제하기 위하여, 가새의 국부좌굴 거동을 파악하고 좌굴제어 방법을 찾고자 한다. 좌굴을 제어하기 위한 방법으로, 하나는 좌굴 영역에 커버플레이트를 설치하여 좌굴을 구속함으로써 변형능력을 확보하고자 하는 것이며, 다른 하나는 가새 중앙부에 강봉과 스프링을 이용한 수축장치를 삽입하여 압축 시 좌굴의 위험을 배제하는 것이다. 본 연구의 목적은 국부좌굴을 구속하거나 배제하기 위한 좌굴제어시스템을 제안하고, 실험을 통하여 제안한 방법의 적용성을 조사, 검토하는 것이다. 또한 좌굴제어에 따른 성능향상을 정량적으로 평가하는 것이다.

• 한국물환경학회지
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• 제21권2호
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• pp.132-140
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• 2005

The pilot test of a new alternative for small wastewater treatment system has been conducted for two years. It consists of a hybrid bioreactor and the expert system including the process control logic, PLC system, and HMI for the process automation. In order to monitor and remote control its status, the real-time data was transferred from the on-site control center to the central station via a wireless local area network. More efficient and stable performances were observed at automatic operating mode compared with the manual. On an average, COD, SS, T-N and T-P concentrations in the effluent from the hybrid bioreactor were less than 14, 7, 12 and 0.9 mg/L, respectively. According to the result from pilot tests, the quality of treated wastewater with sand filtration was enough to be utilized again.

• International journal of advanced smart convergence
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• 제9권4호
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• pp.16-25
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• 2020

The operation of a wastewater treatment plant (WWTP) is a complex task which requires to consider several aspects: adapting to always changing influent composition and volume, ensuring treated effluents quality complies with local regulations, ensuring dissolved oxygen levels in biological reaction tanks are sufficient to avoid anoxic conditions etc. all of it while minimizing usage of chemicals and power consumption. The traditional way of managing WWTPs consists in having employees on the field measure various parameters and make decisions based on their judgment and experience which holds various concerns such as the low frequency of data, errors in measurement and difficulty to analyze historical data to propose optimal solutions. In the case of activated sludge WWTPs, parts of the treatment process can be automated and controlled in order to satisfy various control objectives. The models developed by the International Water Association (IWA) have been extensively used worldwide in order to design and assess the performance of various control strategies. In this work, we propose to review most recent WWTP automation initiatives around the world and identify most currently used control parameters and control architectures. We then suggest a framework to select WWTP model, control parameters and control scheme in order to develop and benchmark control strategies for WWTP automation.

• 한국자원식물학회지
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• 제28권1호
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• pp.93-100
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• 2015

유채 종자에서 기름을 착유한 후 부산물인 유채박을 토양에 처리하여 토양 내 선충을 친환경적으로 방제하기 위하여 실험한 결과를 보면, 유채박을 혼합한 토양이 OM, $Av.P_2O_5$, Ca, Mg, CEC 등의 수치가 증가하였으며, 유기물함량은 무처리 토양보다 3배가량 높게 나타났다. 또한 유채박의 glucosinolate 함량은 제주재래종 유채박이 $199.97{\mu}mol/g$로 선망 유채박의 함량보다 $76.62{\mu}mol/g$ 더 많았으며, 특히 progoitrin, gluconapin, glucobrassicanapin, 및 sinigrin 등의 함량이 높게 나타나기 때문에 유채박의 선충밀도 감소에 효과가 있으며 '선망' 유채박보다 제주재래종 유채박이 선충밀도를 더 줄여주었지만 유의적인 차이는 아니었다.