• 대한건축학회논문집:계획계
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• 제34권11호
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• pp.75-84
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• 2018

This study analyzed users' acceptance and intention to use in addition to needs and preferences of smart home technologies, and identified the differences in technology preference and acceptance by different factors. The subjects were residents in the 40s and 60s residing in the Seoul or suburbs of Seoul, and questionnaires were conducted in the 40s while interviews with questionnaires were conducted in the 60s. A total of 105 questionnaires were used as data, and frequency, mean, crossover, independent sample t test, one-way ANOVA and multiple regression analysis were performaed using SPSS23. The results of this study are as follows. First, hypertension, hyperlipidemia and hypercholesterolemia were the most common diseases among respondents and if there was no discomfort, they would like to continue living in the homes of the current residence. Therefore, the direction of smart home development should support the daily living and health care so that residents can live a healthy life for a long time in their living space. Second, the technologies that residents most need were a control technology of residential environments and a monitoring technology of residents' health and physiological changes. The most preferred sensor types are motion sensors and speech recognition while video cameras have a very low preference. Third, technology anxiety was the most significant factor influencing intention to accept smart home technology. The greater the technology anxiety is, the weaker the acceptance of technology. Fourth, when applying smart residential technology in homes, various resident characteristics should be considered. Age and technology intimacy were the most influential variables, and accordingly there were differences in technology preference and acceptance. Therefore, a user-friendly smart home plan should be done in the consideration of the results.

• 한국컴퓨터정보학회논문지
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• 제25권12호
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• pp.55-61
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• 2020

유전자 알고리즘은 명료한 방식으로 답을 찾기 어려운 문제, 즉 NP 문제의 경우 효과적인 솔루션을 찾을 수 있다. 단 유전자 알고리즘의 실행 비용은 기존 프로그래밍 방식에 비하여 높은 비용을 요구하게 되므로, 높은 성능의 실행환경을 전제로 한다. 이러한 문제를 조금이나마 줄여보기 위하여 본 연구는 유전자 알고리즘의 돌연변이 연산자를 초점을 맞추고, 돌연변이 연산의 복잡한 실행을 위한 비용을 고려하여, 과연 해당 연산자가 모든 문제 영역에서 반드시 요구될까를 분석하기 위한 실험을 진행한다. 우리 실험 주체는 유전자 알고리즘을 적용하는 대표적인 문제 중의 하나인 TSP(Travelling Salesman Problem)으로 하였다. 돌연변이 연산을 적용하는 경우와 적용하지 않는 경우에 대한 결과값들을 세대수와 적합도 값을 수집하여 분석한다. 그 결과 돌연변이 연산자를 적용하는 경우가 세대수 감소와 적합도 향상의 효과적인 결과를 반드시 보이지는 않았다.

• 한국정보통신학회논문지
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• 제24권2호
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• pp.186-191
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• 2020

이 논문에서는 차량 운반선에서 선적 계획과 하적 계획에 따른 차량 선적을 효과적으로 진행하기 위하여, 선박 내 데크에 차량을 효율적으로 배치하는 최적화 기법을 제안하였다. 이를 위해, 선박의 공간 정보를 나타내는 XML 데이터의 변환, 병합 및 분할 알고리즘, 유전자 알고리즘을 활용하였으며, 또한 최적화된 차량 배치 결과를 시각화하는 기능까지 구현하였다. 기존의 전형적인 유전자 알고리즘에서 사용되는 선택, 교차, 변이, 엘리트 보존 등의 기법들을 활용하였으며, 특히 차량의 선적을 위한 선박 공간을 병합 및 분할하는 기법을 함께 제안하여 차량 배치 최적화 기법을 제안하였다. 실험 결과, 기존의 유전자 알고리즘만으로 최적화하기 힘든 부분에 제안한 병합 및 분할 기법을 적용하는 것이 최적화 과정에 효과적이었음을 확인할 수 있었다. 또한, 시각화 기법을 통해 차량 배치 결과를 도면 형태로 보여줌으로써 배치 결과의 효율성을 전문가가 쉽게 판단할 수 있도록 하였다.

• 한국치위생학회지
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• 제21권4호
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• pp.413-425
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• 2021

Objectives: This study aimed to provide basic data to lay the groundwork for the introduction of an advanced dental hygienist system by sampling dental hygienists' views about the system. Methods: A nationwide questionnaire survey was conducted targeting 857 dental hygienists working at dental hospitals and clinics, local health institutions, and educational institutions. The collected data were analyzed using frequency analysis, t-test, one-way analysis of variance (ANOVA) (Duncan as post-analysis), and crossover analysis. Results: The average interest level in the advanced dental hygienist system was 3.83±0.95 points. The necessity by field was confirmed to be the highest during dental hygiene for the elderly and persons with disabilities. The working experience necessary for becoming a specialized dental hygienist is 5.56±2.99 (years). The education period necessary for becoming a specialized dental hygienist is 77.30±77.61 (hours). The work authority level for an advanced dental hygienist was indicated to be 50 respondents (5.8%), who said they required direct guidance from a dentist, 313 respondents (48.2%) who said they needed indirect guidance from a dentist, 200 respondents (23.3%) who said OK when given an advanced dental hygienist's separate judgment, 194 respondents (22.6%), who said that the authority must be varied depending on the work. Conclusions: The interest and need of the advanced dental hygienist system were proven to be high and are expected to be applied to basic data for the introduction and settlement of the system.

• 고신대학교 의과대학 학술지
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• 제33권2호
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• pp.171-180
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• 2018

Objectives: We investigated whether asthma attacks in asthmatic children were caused by short-term exposure to particulate $matter(PM)_{2.5}$. Methods: Subjects were 411 patients who received inhalation therapy in National Fukuoka Hospital, from March to May 2013. All subjects were outpatients. We surveyed the air quality measurement results in the stations closest to the address of the patients. Data were used from the City of Fukuoka website data on air pollution. We carried out a case-crossover study and compared $PM_{2.5}$ concentration between 7 days after asthma attack occurred and the day asthma attack occurred and 1, 2 and 3 days before asthma attack occurred. Results: Highest hourly concentration of the day (OR 1.013, 95%CI 1.000-1.025) showed a significant association with 1 day before $PM_{2.5}$ concentration statistically. And 0-1 year-old infants were more vulnerable to the highest concentration of 1 day before $PM_{2.5}$ concentration(P < 0.05). Average concentration of $NO_2$ and $O_3$ and asthma attack also showed a significant association. Conclusions: Maximal daily $PM_{2.5}$ concentrations within 24 hours prior to the attack affect asthma exacerbation. 0-1 year-old infants are particularly vulnerable to $PM_{2.5}$ concentration. Asthma exacerbation is aggravated by $NO_2$ and $O_3$ concentration on the day of the asthma attack.

• Clinical and Experimental Emergency Medicine
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• 제5권4호
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• pp.272-277
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• 2018

Objective While the effect of typhoons on emergency medicine has been evaluated, data are scarce on their effects on the emergency medical service (EMS). This study evaluated the effect of typhoons on EMS patients and performance. Methods The study period was January 2010 to December 2012. Meteorological data regarding typhoons were provided by the Korean Meteorological Administration. EMS data were retrieved from the EMS database of the national emergency management agency. The database includes ambulance run sheets, which contain clinical and operational data. In this case-crossover study, the cases and controls were EMS calls on the day of typhoon warnings and calls one week prior to the typhoon warnings, respectively. Results During the study period, 11 typhoons affected Korea. A total of 14,521 cases were selected for analysis. Overall, there were no obvious differences between the case and control groups. However, there were statistically significant differences in age, place, and time requests. There were fewer patients between 0 and 15 years of age (P=0.01) and more unconscious patients (P=0.01) in the case group. The EMS operational performance, as measured by the times elapsed between call to start, call to field, and call to hospital did not differ significantly. There was also no significant difference in the time from hospital arrival between the cases (28.67, standard deviation 16.37) and controls (28.97, standard deviation 28.91) (P=0.39). Conclusion Typhoons did not significantly affect the EMS system in this study. Further study is necessary to understand the reasons for this finding.

• Physical Therapy Rehabilitation Science
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• 제10권1호
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• pp.55-63
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• 2021

Objective: The purpose of this study was to examine the effects of balance training with Functional Electrical Stimulation (FES) on balance and gait in patients with chronic stroke. Design: A cross over design Methods: Nine patients with stroke were recruited into this study. They were measuring their balance ability and gait ability. The intervention "A" included 4 weeks of balance training with Functional Electrical Stimulation (FES) for 40 m/d, 3 d/wk. Intervention "B" included 4 weeks of balance training with placebo Functional Electrical Stimulation (FES) for 40 m/d, 3 d/wk. Of the 9 patients who completed the study, 5 were randomly assigned to" group A-B", and 4 to group B-A. The crossover occurred after 4 weeks. Results: Following are the specific results of balance training with Functional Electrical Stimulation (FES) on patients with chronic stroke. First, patients who received treatment A showed improvement compared with patients who received treatment B in static balance. There were significant decreases in anterioposterior, mediolateral postural sway extension and velocity moment (p<0.05) with their eyes opened and closed conditions. Second, they had significantly improved in dynamic balance (p<0.05). Lastly, there were also improvement in their gait velocity and cadence (p<0.05). Conclusions: These findings suggest that, the Functional Electrical Stimulation (FES) combined with balance training more effectively improves the balance and gait ability, I'm convinced that it could be actively used in clinics added to the conventional physical therapy in the future.

• Journal of Dental Anesthesia and Pain Medicine
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• 제21권6호
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• pp.527-545
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• 2021

The aim of this systematic review was to determine the success rate of nitrous oxide-oxygen procedural sedation (NOIS) in dentistry. A systematic digital search was conducted for publications or reports of randomized controlled trials evaluating the clinical performance of NOIS. Abstracts of research papers were screened for suitability, and full-text articles were obtained for those who met the inclusion and exclusion criteria accordingly. The quality of the studies was assessed using the revised Cochrane risk-of-bias tool (RoB 2). A total of 19 articles (eight randomized clinical trials with parallel intervention groups and 11 crossover trials), published between May 1988 and August 2019, were finally selected for this review. The studies followed 1293 patients reporting NOIS success rates, with a cumulative mean value of 94.9% (95% CI: 88.8-98.9%). Thirteen trials were conducted on pediatric populations (1098 patients), and the remaining six were conducted on adults (195 patients), with cumulative efficacy rates of 91.9% (95% CI: 82.5-98.1%) and 99.9% (95% CI: 97.7-100.0%), respectively. The difference was statistically significant (P = 0.002). Completion of treatment and Section IV of the Houpt scale were the most used efficacy criteria. Within the limitations of this systematic review, the present study provides important information on the efficacy rate of NOIS. However, further well-designed and well-documented clinical trials are required and there is a need to develop guidelines for standardization of criteria and definition of success in procedural sedation. Currently, completion of treatment is the most used parameter in clinical practice, though many others also do exist at the same time. To maximize NOIS efficacy, clinicians should strictly consider appropriate indications for the procedure.

• 디지털융복합연구
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• 제20권4호
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• pp.519-528
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• 2022

연구 목적은 COVID-19 사태 이후 1인이 경험한 고립 요인을 시각적 전이에 기초한 내러티브 방법으로 살펴, 1인 경험의 디자인 방향을 탐구하는 데 있다. 연구 범위는 비대면 디지털 플랫폼을 통해 참여한 20대 여성 8명의 COVID-19 경험이다. 연구 방법은 참여자가 COVID-19 상황과 유사한 디지털 이미지를 선택하여 이에 근거한 경험 사실을 기술하면, 이를 연구자가 미시적으로 분석한 것으로 한정한다. 분석 결과, 고립 요인은 대면 소통의 부족, SNS 의존, OTT 서비스 중독, 외부 장소 이용 및 활동 한정, 비대면 기술의 한계, 비대면 교육 효과의 한계, 감염병 우려 등으로 요약되었다. 그러므로 고립 극복 요소에 근거한 1인 경험 디자인 방향은 관계 회복을 위한 커뮤니케이션, 온·오프라인 통합의 비 경계 장소, 현존감 구현을 위한 디지털 융·복합 콘텐츠 등이 전제되어야 할 것으로 예측된다.

• International Journal of Computer Science & Network Security
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• 제22권10호
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• pp.73-82
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• 2022

Early detection continues to be the mainstay of breast cancer control as well as the improvement of its treatment. Even so, the absence of cancer symptoms at the onset has early detection quite challenging. Therefore, various researchers continue to focus on cancer as a topic of health to try and make improvements from the perspectives of diagnosis, prevention, and treatment. This research's chief goal is development of a system with deep learning for classification of the breast cancer as non-malignant and malignant using mammogram images. The following two distinct approaches: the first one with the utilization of patches of the Region of Interest (ROI), and the second one with the utilization of the overall images is used. The proposed system is composed of the following two distinct stages: the pre-processing stage and the Convolution Neural Network (CNN) building stage. Of late, the use of meta-heuristic optimization algorithms has accomplished a lot of progress in resolving these problems. Teaching-Learning Based Optimization algorithm (TIBO) meta-heuristic was originally employed for resolving problems of continuous optimization. This work has offered the proposals of novel methods for training the Residual Network (ResNet) as well as the CNN based on the TLBO and the Genetic Algorithm (GA). The classification of breast cancer can be enhanced with direct application of the hybrid TLBO- GA. For this hybrid algorithm, the TLBO, i.e., a core component, will combine the following three distinct operators of the GA: coding, crossover, and mutation. In the TLBO, there is a representation of the optimization solutions as students. On the other hand, the hybrid TLBO-GA will have further division of the students as follows: the top students, the ordinary students, and the poor students. The experiments demonstrated that the proposed hybrid TLBO-GA is more effective than TLBO and GA.