• Journal of Korean Neurosurgical Society
• /
• 제65권4호
• /
• pp.514-522
• /
• 2022

Objective : A distal navigation of a large bore aspiration catheter during mechanical thrombectomy (MT) is important. However, delivering a large bore aspiration catheter is difficult to a tortuous or atherosclerotic artery. We report the experience of anchoring with balloon guide catheter (BGC) and stent retriever to facilitate the passage of an aspiration catheter in MT. Methods : When navigating an aspiration catheter failed with a conventional co-axial microcatheter delivery, an anchoring technique was used. Two types of anchoring technique were applied to facilitate distal navigation of a large bore aspiration catheter during MT. First, a passage of aspiration catheter was attempted with a proximal BGC anchoring technique. If this technique also failed, another anchoring technique with distal stent retriever was tried. Consecutive patients who underwent MT with an anchoring technique were identified. Details of procedure, radiologic outcomes, and safety variables were evaluated. Results : A total of 67 patients underwent MT with an anchoring technique. Initial trial of aspiration catheter passage with proximal BGC anchoring technique was successful for 35 patients (52.2%) and the second trial with distal stent retriever anchoring was successful for 32 patients (47.8%). Overall, navigation of a large bore aspiration catheter was successful for all patients (100%) without any procedure related complications. Conclusion : Our study showed the usefulness of anchoring technique with proximal BGC and distal stent retriever during MT, especially in those with an unfavorable anatomical structure. This technique could be an alternative option for delivering an of aspiration catheter to a distal location.

• 대한한의학원전학회지
• /
• 제35권4호
• /
• pp.25-39
• /
• 2022

Objectives : This paper analyzes the new Majinhwiseong(麻疹彙成) manuscript discovered in Jeonju. The Majinhwiseong is a medical book specializing in measles co-authored in 1798 by Lee, Won-pung and three doctors from a middle class family. Until recently, the Handok (Korean-German) Medicine Museum copy was known to be the only existing version, but a new manuscript was recently discovered. Methods : The author, bibliography, organization, cited literature, and content of the book were studied. The contents of the Handok Museum of Medicine copy and other manuscripts were compared then reviewed. Results : 1. The book shows that middle class workers in the late 19th century were able to collaborate based on the results of their craft and form strong bonds. 2. The book was being prepared for publication in Pyeongan Gamyeong in December 1798, but failed to be published due to the sudden death of the Pyeongan-do governor. 3. For a correct understanding of this book, it is necessary to study the Handok Medicine Museum edition and the newly discovered manuscript (Jeonju edition) together. Conclusions : The two editions are of a different lineage. The Jeonju edition is overall more specific, while some parts are more detailed in the Handok edition. In conclusion, the Majinhwiseong is a book that was written by middle class doctors of late 18th century whose clinical experience was combined with Chinese medical theories. The book was specifically targeted to professional medical audiences.

• 웰빙융합연구
• /
• 제5권3호
• /
• pp.43-49
• /
• 2022

Purpose: This study aims to study the perception of merchants and customers about the odor problem of traditional markets in Wonju, Gangwon-do. Research design, data and methodology: A survey was conducted to investigate the perception. The survey consisted of 11 questions for merchants and 12 questions for customers. Results: In a survey of merchants - The question 'What kind of smell did you smell at the traditional market?' was investigated with multiple responses. Regarding the odor experience, unclean odor was the highest with 105 votes (36%), followed by rotting odor with 82 votes (28.1%) and other odors with 44 votes (15.1%). In a survey of customers - The question 'What kind of smell did you smell at the traditional market?' was investigated with multiple responses. As a result of the survey, filthy smell was the highest with 98 votes (43.2%). Next, rotten smell was found with 60 votes (26.4%) and others with 31 votes (13.7%). Conclusions: If the odor problem in the traditional market is solved, the economic and health damage to the merchants will be reduced. Further, it will help to revitalize traditional markets by increasing customer visits. As a solution, it is judged that it is good to study the direction of the establishment of a real-time monitoring system and the preparation and application of odor removal measures.

• Nuclear Engineering and Technology
• /
• 제54권11호
• /
• pp.4373-4391
• /
• 2022

Marine reactor systems experience platform movement, and therefore, the system thermal-hydraulic analysis code needs to reflect the motion effect on the fluid to evaluate reactor safety. A moving reactor model for MARS-KS was developed to simulate the hydrodynamic phenomena in the reactor under motion conditions; however, its applicability does not cover the MULTID component used in multidimensional flow analyses. In this study, a moving reactor model is implemented for the MULTID component to address the importance of multidimensional flow effects under dynamic motion. The concept of the volume connection is generalized to facilitate the handling of the junction of MULTID. Further, the accuracy in calculating the pressure head between volumes is enhanced to precisely evaluate the additional body force. Finally, the Coriolis force is modeled in the momentum equations in an acceleration form. The improvements are verified with conceptual problems; the modified model shows good agreement with the analytical solutions and the computational fluid dynamic (CFD) simulation results. Moreover, a simplified gravity-driven injection is simulated, and the model is validated against a ship flooding experiment. Throughout the verifications and validations, the model showed that the modification was well implemented to determine the capability of multidimensional flow analysis under ocean conditions.

• Educational Technology International
• /
• 제8권2호
• /
• pp.53-71
• /
• 2007

This study identified the effectiveness of e-learning by comparing learning outcome in conventional face-to-face lecture with the selected e-learning methods. Two e-learning contents (animation based and video based) were developed based on the rapid prototyping model and loaded onto the learning management system (LMS), which is http://www.enaged.co.kr. Fifty-four Korean agricultural high school students were randomly assigned into three groups (face-to-face lecture, animation based e-learning, and video based e-learning group). The students of the e-learning group logged on the LMS in school computer lab and completed each e-learning. All students were required to take a pretest and posttest before and after learning under the direction of the subject teacher. A one-way analysis of covariance was administered to verify whether there was any difference between face-to-face lecture and e-learning in terms of students' learning outcomes after controlling the covariate variable, pretest score. According to the results, no differences between animation based and video based e-learning as well as between face-to-face learning and e-learning were identified. Findings suggest that the use of well designed e-learning could be worthy even in agricultural education, which stresses hands-on experience and lab activities if e-learning was used appropriately in combination with conventional learning. Further research is also suggested, focusing on a preference of e-learning content type and its relationship with learning outcome.

• 대한의용생체공학회:의공학회지
• /
• 제45권1호
• /
• pp.37-42
• /
• 2024

In this study, we explored the possibility of using sympathetic skin response (SSR), a type of electrodermal activity (EDA), as a method of evaluating a subject's responsiveness to physical or psychological stimulation. To provide physical and psychological stimulation, walking on an acupressure plate and a roller coaster virtual reality experience wearing an HMD (head mounted display) were used. Walking on an acupressure plate significantly increased the SSR signal compared to walking on the bare floor. Additionally, it was observed that the SSR response significantly increased while the subject was wearing an HMD and experiencing a roller coaster compared to the resting state of sitting on a chair. The SSR response to physical or psychological stimulation increased in all subjects, but the degree of reactivity differed. These experimental results suggested that sympathetic skin response (SSR) is a useful tool as a biosignal that can be used to evaluate the human body's responsiveness to physical stimulation or psychological stimulation using virtual reality.

• International Journal of Internet, Broadcasting and Communication
• /
• 제16권2호
• /
• pp.50-58
• /
• 2024

Body temperature plays an important role in medicine, some diseases are characterized by changes in human body temperature. Monitoring body temperature also allows doctors to monitor the effectiveness of medical treatments. Accurate body temperature measurement is key to detecting fevers, especially fevers related to infection with the SARS-CoV-2 virus that caused the recent Covid-19 pandemic in the world. The solution of measuring body temperature using a thermal camera is fast but has a high cost and is not suitable for some organizations with difficult economic conditions today. Use a medical thermometer to measure body temperature directly for a slow rate, making it easier to spread disease from person to person. In this paper, we propose a completely automatic body temperature measurement system that can adjust the height according to the person taking the measurement, has a measurement logging system and is monitored via the internet. Experimental results show that the proposed method has successfully created a fully automatic human body measurement system. Furthermore, this research also helps the school's scientists and students gain more knowledge and experience to apply Internet of Things technology in real life.

• 한국자연치유학회지
• /
• 제11권1호
• /
• pp.18-30
• /
• 2022

배경: 제주도 화산섬 지하자원인 현무암 "숲" 지하 공기(숨골)의 효과를 검증하기 위하여 '지하 공기정화 층을 이용한 공기정화시스템(APS)'을 개발한 후에 정화 공기 체험장을 설치하였다. 이 정화 공기를 채취하여 분석하고 인체에 유용성에 관한 탐색연구가 필요하다. 목적:현무암 "숲" 지하 공기(숨골)를 APS로 채취하여 성분을 분석하고, 이 공기를 체험한 후에 인체에 미치는 영향을 탐색하는 것이었다. 방법: 제주도의 파파빌레 지역의 4개의 지점에 APS 장치를 설치하였다. APS에서 배출하는 지하 공기를 채집하여 자원화 성분을 분석하였다. 또한 공기 밀폐 연구 체험장을 지상에 설치하였으며, 이 체험장의 음이온 농도는 5,000 ions/m³정도이었고, 체험자들이 60~120분 정도 머무르게 한 후에 혈관 상태를 조사하였다. 결과: 현무암 '숲' 지하 공기를 채취하여 분석한 결과는 O₂ 농도는 21.18%로 대기의 평균 산소 농도 20.94%보다 높았다. 폼알데하이드는 검출되지 아니하였고, CO₂농도는 419 ppm으로 실내공기보다 낮았다. 미세먼지(PM2.5) 농도는 24 ㎍/ms 이하였으며, 음이온도 5.000 ions/m³ 이상 검출되었다. 체험한 사람들의 혈관 건강 지수 개선되었고, 평균 맥박의 증가 및 스트레스 해소 등의 효과가 높게 나타났다. 결론: 현무암 "숲" 지하공기(숨골)를 분석하여 규명한 유용한 성분은 자연치유 등에 활용할 가치가 높았고, 체험한 결과에서는 맥박의 증진, 혈관과 스트레스 개선에 효과를 나타냈다. 이러한 조건은 제주지역의 현무암 숲이 자연치유와 웰니스 산업으로 확장하기 위한 새로운 지역이라고 높게 평가할 수 있다.

• 초등상담연구
• /
• 제6권1호
• /
• pp.95-116
• /
• 2007

This thesis is aimed to understand when and how elementary teachers scold their students and to explore any common psychological factors shown in the process. In order to produce the meaningful results of the research, applied is experience-based analysing method which expectedly leads to discovering psychological cause and effect occurring when school teachers scold students. 11 teachers of elementary school, including me the author, have joined as co-researchers to solve the next two issues and I made guidelines for the analysis. Given that co-researchers are locally scattered, they were grouped into three and in the mean time, analysis on scolding during 4 meeting sessions were made. The results of research problems are as follows. First issue: What common psychological factors exist in when and how teachers scold students? Common factors in 'when' part include three cases: teachers discovering the factors hindering student's desirable growth, noticing the class rules and peaceful communities are broken, or experiencing humiliating remarks and annoying behaviors and In "how' part, on the other hand, teachers speak up in a stronger voice or raise their tone to point out student's wrongdoing and give students a stoic and fierce look. Second issue: What psychological development takes place in scolding? Teachers who participated in this scolding experiment have experienced' feeling responsible and upset'. Feeling responsible is highly likely to be interpreted to result from the idea that teachers supposedly support students to grow into well-functional person in society. Meanwhile, feeling upset or even humiliated is caused by the frustration when they find their authority and dignity Ignored and damaged. The phases teachers go through during the scolding are: recognizing scold-inviting situation-> interpreting clues deserving enough to scold-> being aroused into the feelings-> deciding how to respond-> executing decision-> dealing with emotion. This thesis has distinctive qualities from existing ones in that the research focuses on agonies and conflicts faced with school teachers in class. On top of that, it is noted that this thesis meaningfully enables to realize teachers' psychological mechanism activated from scolding and to provide teachers with opportunities to see themselves more proper perspectives. However, there still remains some reservation since I had rather short period of time to collect data and we, co-researchers, had meeting sessions. To compensate for the possible shortcomings shown in this thesis, further research is expected to be followed to perform a practical analysis.

• 생명과학회지
• /
• 제9권2호
• /
• pp.169-175
• /
• 1999

Salmonella typhimurum은 생활사 동안에 다양한 환경과 접하게 된다. S. typhimurium은 오염된 웅덩이에서 숙주의 phgolysosome에 이르기까지 생태계에 널리 분포하면서 산성 스트레스를 경험하며 또한 생존할 수 있다. Salmonella 이와 같은 산저항능은 Acid Tolerance Response (ATR)에 의해 획득된다. 약산의 pH에 적응된 S. typhimurium은 낮은 pH 영역에서 생존할 수 있는 일종의 대항능을 갖게되며, 이런 생존 능력은 복잡한 유전적 유도현상 결과로 해석된다. Salmonella 있어서 ATR은 RpoS 의존적 그리고 RpoS 비의존적 현상으로 구분되며, 특히 혐기적 조건(5% $CO_2$, 5% H$_2$, 90% $N_2$)에서 rpoS$\Omega$Ap는 UK1과 동일한 ATR을 나타내어, 혐기적 조건의 ATR은 RpoS 비의존적인 것으로 판명되었다. P22와 MudJ (Km, lacZ)를 이용한 gene fusion기법과 sodium acetate (pH4.5)를 이용한 돌연변이체 분리방법을 병행하여 산민감성의 형질을 나타내는 LE487 aatA::MudJ를 얻었다. antA 는 Salmonella의 유전자 지도상에서 12min에 위치하는 것으로 조사되었다. antA는 혐기적 조건(5% $CO_2$, 5% H$_2$, 90% $N_2$)하의 pH4.3 조건에서 야생형 Salmonella 비해서 매우 높은 산민감성을 보여주었다. 그러므로 antA는 혐기적 ATR에 있어서 산적응 기전에 관여하는 중요한 유전자로 확인되었다.