• 한국치위생학회지
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• 제20권5호
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• pp.675-684
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• 2020

Objectives: This study examined the professionalism, major satisfaction, self-leadership, and career preparation behavior of dental hygiene students, and examined the factors affecting career preparation behavior. Methods: A self-administered questionnaire survey was conducted among dental hygiene students in the Seoul and Gyeonggi areas of Korea, and finally, questionnaires submitted by 190 subjects were analyzed. Statistical analysis was conducted using SPSS 21.0. Results: The average scores for professionalism, major satisfaction, self-leadership, and career preparation behavior among the evaluated subjects were 3.68±0.56, 3.44±0.46, 3.57±0.55, and 3.24±0.52, respectively. Students who answered that their motivation for career preparation according to general characteristics was "because it is a valuable job" showed the highest score of 3.60±0.54 for professionalism (p<0.01) and higher scores for major satisfaction and career preparation behavior (p<0.001). The factors that affected career preparation behavior were self-leadership (p<0.001), major satisfaction (p<0.01), and professional intuition (p<0.01). Conclusions: The study findings showed that groups with higher self-leadership, major satisfaction, and professionalism exhibited more active career preparation behavior. Therefore, various educational programs are needed to improve dental hygiene (academics) and career preparation behavior of students.

• Restorative Dentistry and Endodontics
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• 제19권1호
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• pp.73-84
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• 1994

Using a model system that can compare the before and after of canal preparation in the same tooth, we measured the area of the cross section, and canal wall thickness of the distal portion of the mesial root of the mandibular molar, and compared the amount of reduction in the canal using hand flared preparation the Gates-Glidden drill flared preparation according to the changes in the MAF. The results were as follows. 1. After canal preparation, the canal wall thickness had no significant difference between the hand flared preparation and Gates-Glidden drill flared preparation. 2. The canal wall thickness, after canal preparation, there was no significant difference between the sizes of the MAF. 3. The area variation range of each cross section of root had no significant difference between MAF size and methods of canal preparation. 4. After canal preparation, the frequency of the canal wall thickness under 0.5mm showed 3.5mm below the furcation to be the most frequent with statistical significance(p<0.05). 2mm below the furcation and 5mm below the furcation followed but there was no statistical significance. 5. The danger zone of the mesial root of the mandibular molar seems to be around 3.5mm.

• Elastomers and Composites
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• 제45권2호
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• pp.80-86
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• 2010

탄소나노튜브는 우수한 기계적 특성, 전기적 및 자기적 성질 뿐만 아니라 나노 크기의 직경 및 높은 종횡비를 나타낸다. 이는 고강도 고분자 복합체의 이상적인 보강제로 사용할 수 있다. 기능성이 부과된 탄소나노튜브는 기능성 재료 및 복합재료의 제조와 같은 분야에서 아주 유력한 재료로 믿어진다. 탄소나노튜브-고분자 복합체는 탄소나노튜브의 우수한 기능성과 고분자의 우수한 가공성을 가질 것으로 기대된다. 그러나, 탄소나노튜브는 보통 반 델 바알스 작용에 의한 안정화된 번들을 형성하기 때문에 고분자 기지에 배열이나 분산이 상당히 어렵다. 탄소나노튜브 강화복합체의 제조에서 가장 큰 이슈는 고분자내에 탄소나노튜브의 효과적인 분산이며, 기지내에 탄소나노튜브의 배열과 양의 조절이다. 고분자 기지내에 탄소나노튜브의 분산은 용액혼합, 벌크 혼합, 용융혼합, 즉시 고분자화 반응 및 탄소나노튜브의 화학적 기능화 등과 같은 몇 가지 방법이 있다. 본 논평에서는 이들 방법과 고성능 탄소나노튜브-고분자 복합체의 제조에 대하여 서술하고자 한다.

• Food Science and Biotechnology
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• 제18권2호
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• pp.565-569
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• 2009

This study was conducted to evaluate the effects of different preparation methods on the recovery and quantification of ginsenosides in raw Korean ginseng (Panax ginseng C.A. Meyer). Eight major ginsenosides ($Rb_1$, $Rb_2$, $Rb_3$, Rc, Rd, Re, Rf, and $Rg_1$) were analyzed by high performance liquid chromatography (HPLC), after which the recovery and repeatability of the extraction of those ginsenosides using 3 different preparation methods were compared [A. direct extraction (DE) method, hot MeOH extraction/evaporation/direct dissolution; B. solid phase extraction (SPE) method, hot MeOH extraction/evaporation/dissolution/$C_{18}$ cartridge adsorption/MeOH elution; C. liquid-liquid extraction (LLE) method, hot MeOH extraction/evaporation/dissolution/n-BuOH fractionation]. Use of the DE method resulted in a significantly higher recovery of total ginsenosides than other methods and a relatively clear peak resolution. Use of the SPE and LLE methods resulted in clearer peak resolution, but lower ginsenoside recovery than the DE method. The LLE method showed the lowest ginsenoside recovery and repeatability among the 3 methods. Given that the DE method employed only extraction, evaporation, and a dissolution step (avoiding complicate and time consuming purification), this technique may be an effective method for the preparation and quantification of ginsenosides from raw Korean ginseng.

• 대한한방소아과학회지
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• 제25권2호
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• pp.102-110
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• 2011

Objectives: The purpose of this study is to analyze the baby bath preparation and provide necessary information on the upcoming herbal bath preparation for atopic dermatitis. Methods: We selected 113 baby bath preparation by searching typing in "baby bath preparation" in 6 major web-search-engines, and 17 web shopping malls in Korea. 11 items were evaluated under three criteria : type of product, function and ingredient of goods. Results: Result showed that the most common type of bath preparation were liquid type. 96% of the products contained medical agents. Ingredients of the medical agents were herbal medicine, aroma oil, spring and sea ingredients, vitamin and extract. 33% of the products were bath preparation for the atopic dermatitis and 74% of the products were only for the baby. Conclusions: It is necessary to make a government level guideline for natural materials used in bath preparation, and to develop new products contained herbal medicine abide by oriental medical theory.

• 한국의사학회지
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• 제28권1호
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• pp.81-92
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• 2015

Objectives : The purpose of this study is to analyze and identify the problems of current laws and regulations regarding preparation and processing of herbal medicines at hospitals of Korean Medicine. Possible solutions are proposed in the end Methods : Based on the status of hospitals of Korean Medicine and characteristics of Korean Medicine and Korean Medicine industry, I analyze the laws and regulations in regards to preparation and processing of herbal medicines and propose possible solutions. Results : Regulations for the agents, places, and cautions in respect of preparation and processing of herbal medicines are inadequate. Meanwhile, the definition of drug preparation in the Pharmaceutical Affairs Act does not apply to processing and preparation of herbal Medicines at hospitals of Korean Medicine, since herbal medicines accompanies chemical and physical change. Discussions & Conclusions : New regulations for on-site preparation at hospitals of Korean Medicine are necessary. Also, the definition for herbal medicines preparation, which states possible chemical and physical changes of herbal medicines, should be specified in Pharmaceutical Affairs Act.

• 한국간호교육학회지
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• 제25권1호
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• pp.93-102
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• 2019

Purpose: This study aimed to investigate factors influencing career preparation behavior among male nursing students in South Korea. Methods: Data were collected from May 25 to June 17, 2018 and a total of 158 male nursing students participated in this study. Career decision making self-efficacy, military duty planning, and career preparation behavior were measured using a structured questionnaire. Collected data were analyzed with SPSS 25.0 for windows. Results: There was a statistically significant difference in career preparation behavior of participants according to entrance motivation and desired career after graduation. There were statistically significant correlations between career decision making self-efficacy and career preparation behavior (r=.65, p<.001), and between military duty planning and career preparation behavior (r=.45, p<.001). The influential factors for career preparation behavior were career decision making self-efficacy (${\beta}=.64$, p<.001), and military duty planning (${\beta}=.42$, p<.001). These factors accounted for 42% of the variance in career preparation behavior. Conclusion: The results of this study indicate that to improve career preparation behavior for male nursing students, it is necessary to enhance career decision making self-efficacy and military duty planning.

• 한국직업건강간호학회지
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• 제30권4호
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• pp.175-185
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• 2021

Purpose: The purpose of this study was to explore the influence of care stress for older patients, self-perceptions of aging, and anxiety about aging on preparation for retirement in clinical nurses. Methods: This was a cross-sectional descriptive study in which participants were 222 nurses who had at least six months of work experience and were involved in caring for older patients in the last six months at the work site. Data were collected from August to September, 2020 using an online survey questionnaire. Data were analyzed using the IBM SPSS/WIN 25.0 program. Results: The mean level of preparation for retirement in the participants was moderate (3.21 out of 5 points). Among the sub-domains of preparation for retirement, financial preparation had the lowest score. Self-perceptions of aging and aging anxiety were significant predictors for retirement preparation in nurses, accounting for 16% of the variable's total variance. Conclusion: A greater level of preparation for retirement was associated with a positive perception of aging and a decreased level of aging anxiety in the clinical nurses. Further research should focus on exploration of specific determinants of financial preparation for retirement and development of intervention strategies for improving preparation for retirement in the nursing workforce.

• Elastomers and Composites
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• 제50권1호
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• pp.35-48
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• 2015

Polyhedral oligomeric silsesquioxane (POSS) is an important inorganic-organic hybrid material with a three-dimensional structure. Polyurethane (PU) is a widely applied polymer that has versatile properties with the change of two phase structure. When POSS is incorporated into PU by physical or chemical methods, many properties can be greatly improved, such as mechanical properties, thermal stability, biodegradation resistance, and water resistance. This paper reviews the recent progress in preparation, structure, and performance of POSS-modified polyurethane from the viewpoint of physical blending and chemical modification.

• 대한치과기공학회지
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• 제37권3호
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• pp.145-155
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• 2015

Purpose: The Purpose of the study is to investigate the need for the preparation of old age of Korean dental technicians. Methods: A total of 778 dental technicians were selected by proportional stratified by region compared to extraction sampling from a list of Korea dental technician Association in 2012. The final sample size was 386. Questionnaires consisted of 9 general characteristics, recognition of old age 4, and preparation of old age 9 on a Liken 5 scale. Cronbach's alpha was 0.784 in the study. All statistical analyzed were performed using SPSS 14.0(Statistical Packages for Social Science Ver. 14.0. Chicago, IL, USA). Results: Factors affecting the aging preparation is gender, age, clinical career, work place(p<0.001). Conclusion: This study suggested that preparation for old age of Korean dental technicians was very important and the preparation must be connected with the social welfare policy.