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김송호(Song Ho Kim),김호찬(Ho-Chan Kim),이인환(In Hwan Lee) 한국기계가공학회 2021 한국기계가공학회지 Vol.20 No.9
Tactile sensors and integrated circuits that detect external stimuli have been developed for use in various industries. Most tactile sensors have been developed using the MEMS(micro electro-mechanical systems) process in which metal electrodes and strain sensors are applied to a silicon substrate. However, tactile sensors made of highly brittle silicon lack flexibility and are prone to damage by external forces. Flexible tactile sensors based on polydimethylsiloxane and using a multi-walled carbon nano-tube mixture as a pressure-sensitive material are currently being developed as an alternative to overcome these limitations. In this study, a manufacturing process of pressure-sensitive materials with low initial electrical resistance is developed and applied to the fabrication of flexible tactile sensors. In addition, flexible tactile sensors are developed with pressure-sensitive materials dispensed on a substrate with flexible mechanical properties. Finally, a study is conducted on the change in electrical resistance of pressure-sensitive materials according to the modulus of elasticity of the substrate.
마늘添加食餌가 흰쥐의 血淸 콜레스테롤 글루코오스의 含量 및 血液凝固時間에 미치는 影響
Song Jen Kim(金松田) 한국유화학회 1984 한국응용과학기술학회지 Vol.1 No.1
Effects of garlic on hypocholesterolemia, anticoagulation and hypoglycemia were studied in the present experiments using male rats. The results were summarized as follows. 1. The supplementation of 2~4% garlic to 2% cholesterol diets did not affect food intake and weight gain in male rats. 2. Rat s groups fed the diets supplemented with 2~3% garlic (C.D.E.F) to 2% cholesterol diet (B) decreased serum total cholesterol levels by 16~32%, triglyceride levels by 18.6~26.8% and β/α-lipoportein rations by 42~58%, but increased HDL-cholesterol levels by 29~65% as compared to B group, and so the author assumes that garlic supplementation exerts hypocholesterolemic effect on cholesterol - fed rats because of the increase of HDL and HDL - cholesterol levels. 3. Rat s groups fed the diets supplemented with 2~4% garlic (C.D.E.F) to 2% cholesterol plus 0.25% bile salt diet (B) increased whole blood coagulation times, prothrombin times and fibrinolytic activities, but decreased plasma fibrinogen levels as compared to B group, and so the author assumes that garlic supplementation exerts anticoagulative effect because of the inhibition of fibrinogen synthesis in male rat s liver. 4. Rat s groups fed the diets supplemented with 2~4% garlic (B.C.D.E) to standard diet (A) decreased serum glucose levels by 1~24%, but increased serum insulin concentrations by 0.5~3.0 times as compared to A group, and so the author assumes that garlic supplementation exerts hypoglycemic effect because of the increase of serum insulin levels by stimulation pancreatic secretion of insulin from β-cells in the islets of Langerhans.
김송이(Song Yee Kim),박경자(Kyung Ja Park) 한국아동학회 2001 아동학회지 Vol.22 No.4
Peer conflicts between school-aged children were observed to examine differences in conflict resolution strategies according to children`s sex, peer status, and friendship. One hundred and forty eight dyads in 4th grade were selected for the study. The dyads` interactions in a small room while playing a Domino game were videotaped. Strategies the children used to resolve peer conflicts were analyzed by frequencies, and ANOVAs. School-aged children used reasoning and insistences to the partners frequently to resolve conflicts. Conflict resolution strategies were different by children`s status among peers. Popular children used reasoning and listening more frequently. Rejected children used standing firm, behaving aggressively, ignoring, and withdrawing more frequently, and explaining and listening less frequently. Rejected children, especially rejected boys, used aggressive strategies more frequently.
운동선수가 스포츠 상해에 대해 경험한 의료서비스에 대한 탐색적 연구: 경험, 중요도 및 지불의사를 중심으로
김송이(Dae Chul Kim),김재현(Jae Hyun Kim),김정숙(Jung Sook Kim),차병주(Byung Joo Cha),김대철(Song Yi Kim) 대한스포츠한의학회 2018 대한스포츠한의학회지 Vol.18 No.1
Objectives The purpose of this study was to investigate the athletes medical service experience, the importance of each service recognized by athletes, the willingness to pay for each service. Methods A survey was conducted for athletes or parents who with young athletes as their children. We obtained a response rate of 98% (100 questionnaires were distributed) from five organizations. All questionnaires were self-reported. Results Athletes perceived less satisfaction with health services for diagnosis, injury prevention, and mental support than those received for sports injuries. Respondents were concerned about athlete-specific treatment & rehabilitation programs, suitable programs for young athletes, programs to prevent rehabilitation, and one-stop services for diagnosis-treatment-rehabilitation-injury prevention. However, respondents perceive that the part of the mental domain is important in the area of expertise (treatment / rehabilitation, prevention, mental domain) of the medical service, while the degree of actual experience and satisfaction with the experience are low. Most athletes answered that they would pay an additional 10% for an athlete-specific medical service. Conclusions This study provided basic data on the economic competitiveness of medical services provided in the field of sports medicine. More researches are required to explore the value of Korean sports medicine.
한국 장년층 주관적 구강건강상태의 9년간 변화: 국민건강영양조사 4-6기 자료 이용
김송이 ( Song-yi Kim ),김남희 ( Nam-hee Kim ) 대한예방치과·구강보건학회 2019 大韓口腔保健學會誌 Vol.43 No.2
Objectives: To explore changes in self-reported oral health in middle-aged Koreans over a period of 9 years. Methods: This study design was a cross-sectional analysis. This study analyzed the data of 18,845 middle-aged (45-64 years) subjects who participated in 4-6th Korea National Health and Nutrition Examination Surveys (KNHANES). A complex-sample chi-square test was used to analyze self-reported poor oral health according to sex, household income, and education. A complex-sample logistic regression analysis was used to identify the changes in the factors. SPSS 23.0 and the R ver. 3.5.1 statistical package were used for the analyses. Results: Poor oral health have been decreased by 5.3% over the 9-year period. Middle-aged men were more likely to report their oral health as worse than women. The lower income and education groups reported their oral health as poor compared to the higher income and education groups. The factors affecting self-reported poor oral health over the 9-year period were sex, income, and education. Conclusions: More than half of the aged population reported their oral health as poor. Oral health policies should be established for the aged population, including the middle-aged population, for long-term plans.
김송학(Song Hak Kim),장조원(Jo Won Chang) 한국가시화정보학회 2004 한국가시화정보학회지 Vol.2 No.2
The purpose of this visualization study is to investigate the effect of reduced frequency qualitatively by examining wake patterns for dragonfly flight motion. Dragonflies have two pairs of wing (a forewing and hindwing) and flight is achieved by a pitching and plunging, so it makes a separation over the wings. The separation affects the wake pattern and changed wake pattern has an influence on lift, drag, and propulsion. This experiment was conducted by using a smoke wire technique and a camera fixed above the test section used to take a photograph of the wake. An electronic device is mounted below the test section to find the exact mean positional angle of the wing. The reduced frequency in the experiment is 0.15, 0.3 and 0.45. Results show that reduced frequency is closely related to the wake pattern that determines flight efficiency.