• 한국사회복지학
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• 제59권4호
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• pp.245-272
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• 2007

본 연구는 혼합방법론의 탐색설계 중 척도개발모델에 의거하여 소진탄력성척도와 소진위험성척도를 개발하고 그 과정에서 산출된 자료들의 의미를 탐색하기 위한 것이다. 이를 위하여 척도개발모델 1단계에서는 선행 질적연구를 통해 도출한 의료사회복지사의 소진 보호 및 위험요인에 기반을 두고 각 척도의 내용을 구성하였고, 2단계 양적 연구 단계에서는 의료사회복지사 185명의 조사자료를 분석하여 척도들의 구성타당도와 신뢰도를 검증하였다. 확인적 요인분석 결과 6요인 31문항의 소진탄력성척도와 6요인 27문항의 소진위험성척도의 구성타당도가 검증되었으며, 두 척도의 신뢰도는 소진탄력성 0.92, 소진위험성 0.90으로 나타났다. 더불어 각 척도 및 하위요인들 간의 상관관계 분석을 통해 소진탄력성과 소진위험성의 속성 및 관계에 대한 분석을 제시하였고, 인구사회학적 변인들에 의한 조사 결과도 살펴보았다. 이와 같은 혼합방법론에 의한 척도개발과정을 통해 현장의 목소리를 최대한 반영하면서 수량적으로도 타당도와 신뢰도가 검증된 척도를 개발할 수 있었다.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제19권4호
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• pp.277-289
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• 2016

수학에서 다루는 개념적 지식과 절차적 지식의 연결은 중요하다. 개념적인 이해 없이 절차적 지식만을 강조하게 되면 무의미하게 알고리즘만을 반복적으로 수행할 가능성이 높기 때문이다. 이 글에서는 대분수와 가분수의 의미있는 상호 변환 과정을 강조하기 위하여 우리나라와 외국교과서에 제시된 대분수의 정의 방식과 대분수와 가분수의 상호 변환 내용을 분석하였다. 분석 결과, 우리나라와 외국의 교과서에서 대분수와 가분수의 변환 과정에서 분수 모델을 이용한 변환과 덧셈식을 활용한 변환으로 차이가 있는 것으로 나타났다. 분석 결과를 통해 대분수와 가분수에 대한 개념적 이해와 대분수와 가분수의 상호 변환과정에서 대분수의 수학적 의미를 바탕으로 학생 스스로 이들의 변환 과정에 대한 알고리즘을 발견할 수 있도록 교과서 내용을 재구성할 필요성을 제안하였다.

• 한국치위생학회지
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• 제22권3호
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• pp.161-170
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• 2022

Objectives: This study aims to conduct in-depth research on the effect of non-surgical periodontal therapy (NSPT) with the application of a comprehensive dental hygiene care (CDHC) process, and provide basic data for the wide application of CDHC. Methods: From May 8, 2021 to September 24, 2021, mixed-methods research was conducted in 36 patients with periodontal diseases. A paired samples t-test was used to analyze the quantitative research data using IBM SPSS program(ver. 22.0; IBM Corp., Armonk, NY, USA) and qualitative research data were analyzed using the thematic analysis method. Results: With NSPT applying the CDHC process, the perception of periodontal health and self-efficacy of periodontal healthcare were increased (p<0.001). Presence of gingivitis, probing pocket depth, bleeding on probing rate, presence of subgingival calculus, and dental plaque index were reduced (p<0.001). Based on 195 meaningful statements, 26 concepts, 12 sub-themes, and 5 themes , , , and were drawn. Conclusions: The perception of periodontal health and the self-efficacy were improved, and substantial change in the clinical index. The CDHC application allowed the study participants to perceive the importance of dental care and professionalism of dental hygienists.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.275-275
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• 2013

Formation and characterization of self-assembled monolayers (SAMs) on various surfaces are the essential basis for many other applications, including molecular switches, biosensors, microfluidics, and fundamental studies in surfaces and interfaces. To improve the performance at these applications, it is a key to control the quantity of each molecule in various mixed SAMs on the surface. In this study, using mixed SAM of carbamate-based hydroquinone (HQ)-PhBr and11-mercaptoundecanol, the quantitative mass spectrometric method of mixed SAM was developed based on comparison study with XPS and FT-IR methods. In addition, our method was applied to another mixed SAM of biotinylated PEG alkane thiol and 11-mercaptoundecanol for verification purpose. Time-of-flight secondary mass spectrometry (ToF-SIMS) analysis was performed to identify and quantify each molecule of mixed SAM along with principal component analysis (PCA). Since there is no matrix effect in the X-ray photoelectron spectroscopy (XPS) and Fourier transform-infrared (FT-IR) techniques, we compared ToF-SIMS results with XPS and FT-IR results. Because PCA results from ToF-SIMS analysis are well matched with XPS and FT-IR results from both mixed SAMs, we are expecting that our method will be useful to identify and quantify each molecule in various mixed SAMs.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1998년도 제13차 학술회의논문집
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• pp.35-40
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• 1998

A nonlinear attitude model of a satellite with thrusters, magnetic torquers and a reaction wheel cluster is developed. Then the linearized version of this satellite attitude model is derived far the attitude hold mode. For comparison purpose, various control methods are considered for attitude control of a satellite. We consider a proportional derivative controller which is actually used in the remote sensing satellite, KOMPSAT. Then a comparison is made with an H$_2$controller, an H$\sub$$\infty$/ controller, and a mixed H$_2$/ H$\sub$$\infty$/ controller. The analysis and numerical studies show that the proportional derivative controller's performance is limited in the sense that the pitch angle cannot approach zero. The simulations also show that among three control methods (H$_2$control, H$\sub$$\infty$/ control, and mixed H$_2$/ H$\sub$$\infty$/ control) H$_2$control has the fastest response time, H$\sub$$\infty$/ control has the slowest and mixed H$_2$/ H$\sub$$\infty$/ control comes in between the first two control methods. On the other hand, H$\sub$$\infty$/ control used least amount of control effort while H$_2$control required the most.

• 통합자연과학논문집
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• 제13권2호
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• pp.47-57
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• 2020

The purpose of this study was to understand experiences of successful aging of community-dwelling elderly living in the Korean community using mixed methods. This study is a mixed methods research using convergent parallel design. 483 elderly people living in the 2 cities were selected as subjects to collect quantitative data. For qualitative data collection, 6 elderly people participated. The level of successful aging for elderly people living at home scored an average of 4.30 ± .59 out of 5 points (4.46 ± .64 for self-efficacy, 4.31 ± .65 for good self-control, 4.29 ± .70 for satisfaction with children's success, and 4.26 ± .61 for partnership with spouses). The main themes of successful aging derived by interview were as follows: 1) fulfill responsibilities of raising children as parents, 2) establish a stable life to overcome difficulties, 3) accept the body being different from the past, and 4) live in harmony with people around them. Based on these results, it is necessary to provide useful health care services that can be used in the local community and to provide service utilization information through various routes in order to achieve a successful aging.

• 한국경영과학회지
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• 제11권2호
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• pp.37-50
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• 1986

In combining dispersed optimization models, either primal or dual(or both) decomposition method widely used as an organizing device. Interpreting the methods economically, the concepts of price and resource-directive coordination are generally well accepted. Most of deomposition/ integration methods utilize either primal information of dual information, not both, from subsystems, while some authors have developed mixed decomposition approaches employing two master problems dealing primal and dual proposals separately. In this paper a hybrid decomposition method is introduced, where one hybrid master problem utilizes the underlying relationships between primal and dual information from each subsystem. The suggested method is well justified with respect to the flexibility in information flow pattern choice (some prices and other quantities) and to the compatibility of subdivision's optimum to the systemwide optimum, that is often lacking in conventional decomposition methods such as Dantzig-Wolfe's. A numerical example is also presented to illustrate the suggested approach.

• 펄프종이기술
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• 제43권4호
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• pp.1-10
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• 2011

Beating or refining is an energy intensive process in paper industry. In India, most of the paper industries blend long fibered softwood pulps with short fibered hardwood or agro based pulps to get the paper properties of competitive level. Refining characteristics of the blend of pulps is very crucial with respect to freeness and strength properties. This study has been carried out to understand the refining behavior of three hardwood pulps and a softwood pulp. The hardwood and softwood pulps are blended in different proportions in two different ways; a) blending after their separate refining, and b) blending before refining followed by mixed refining of the blended pulps. Freeness of pulp, strength, optical and surface properties of paper along with formation have been determined and compared for both the refining methods. The fiber classification of refined pulps was also carried out to analyze the effect of refining method on fiber morphology. The mixed refining of hardwood and softwood pulps marginally affects the fiber morphology in comparison to separate refining of pulps. The strength and other properties of paper prepared from mixed refining of pulps are either better or comparable than those of separately refined pulps.

• 한국식품조리과학회지
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• 제11권5호
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• pp.557-564
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• 1995

This study was attempted to standardize preparation methods of Korean foods; Pibimbab (mixed rice) and Kongnamul Pibimbab (sprout mixed rice with soybean). We followed cooking method by using cookbooks, food service operation recipes , materials distributed by commercial food restaurants from their own experimental kitchens, and home recipes. Before those recipes were standardized, we thoroughly analyzed and modified. The total yield and portions were determined together with weights and procedures. And we evaluated food made by standardized recipes for acceptability by taste panels from Sookmyung Women's University. It concluded that yield volume for Pibimbab and Kongnamul Pibimbab after cooking for 10 persons was 6.5 kg, optimum service temperature was 7$0^{\circ}C$, preparation time was 6 hours, service volumes by one person was 650 g. This presentation for above on food materials and material weights, preparation methodsas well as cautions and references are attached in this research paper.

• 한국정보시스템학회지:정보시스템연구
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• 제32권3호
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• pp.19-39
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• 2023

Purpose This study aims to identify user experience factors that can enhance both metaverse utilization and satisfaction based on the honeycomb model. For this we presented two research questions: first, what are the experience factors of metaverse users? Second, do metaverse user experience factors impact satisfaction? Design/methodology/approach To address these questions, a mixed-methodology approach is employed, including text mining techniques to analyze online reviews and quantitative econometric analysis to reveal the relationship between user experience factors and satisfaction. A total of 69,880 reviews and ratings data were collected. Findings The analysis revealed eight metaverse user experience factors: entertainment, operability, virtual reality, immersion, economic activity, visual performance, avatar, and sociality, all of which were found to have a positive impact on user satisfaction.