• Journal of Educational Research in Mathematics
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• v.23 no.2
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• pp.153-171
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• 2013

The purpose of this study is to investigate characteristics of students' problem solving processes based on their mathematical thinking styles and thus to provide implications for teachers regarding how to employ multiple representations. In order to analyze these characteristics, 202 university freshmen were recruited for a paper-and-pencil survey. The participants were divided into four groups on a mathematical-thinking-style basis. There were two students in each group with a total of eight students being interviewed. Results show that mathematical thinking styles are related to defining a mathematical concept, problem solving in relation to representation, and translating between mathematical representations. These results imply methods of utilizing multiple representations in learning and teaching mathematics by embodying Dienes' perceptual variability principle.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.354-357
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• 2004

Data warehouse is subject-oriented, integrated, non-volatiled data, and it used for OLAP(On-Line Analytical Processing) the extraction of information from making decision processing. In the present, lots of study have been devoted to multidimensional modeling between OLAP operator and star schema. In this paper, the design of using the snowflake schema for object-oriented conceptual relation is more extended than using drill-across operator. The object-oriented relation schema which was not applicable has been improved through the design.

• Journal of Technology Innovation
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• v.20 no.3
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• pp.153-180
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• 2012

The objective of this study is to identify the characteristics of high performer among R&D professionals and to examine the effects of LMX(Leader-Member Exchange) and TFL(Transformational Leadership) on job satisfaction or organizational commitment. The empirical result shows that; 1) when compared with the low performers of R&D professionals, the high performers have more proactive personality such as risk-taking propensity, self-efficacy, need for achievement, 2) the high performers have more innovative problem-solving style, 3) the impact of LMX and TFL on job satisfaction or organizational commitment is significant and positive, 4) the augmentative effect of TFL over LMX on job satisfaction or organizational commitment exists for low performer but does not exist for high performer. Based on the result, the theoretical and practical implications are discussed.

• Culinary science and hospitality research
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• v.22 no.5
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• pp.106-116
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• 2016

This study on the lifestyle of senior citizens measured how slection criteria affects franchise restaurant selection. Word of mouth was determined not to have a negative effect between senior citizen lifestyle and franchise restaurant selection. First, the lifestyle of senior citizens were categorized into 4 sub-variables-extroverted, open, progressive, and future-oriented -. It identified information about the properties of the choice variables franchise restaurants positively influence on the all relationships .Second, the mediating effect of word of mouth was verified form the realtionships.

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.31 no.6
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• pp.25-29
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• 2013

• Review of Korea Contents Association
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• v.6 no.3
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• pp.33-38
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• 2008

• 정보화사회
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• s.110
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• pp.30-34
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• 1997

GLOBALSTAR 사업은 지구로부터 1,414km 떨어진 상공에 48개의 인공 위성을 띄워 이를 지상의 통신망과 연결시켜서 각종의 통신서비스를 제공하고자 하는 것이다.

• Journal of Digital Convergence
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• v.20 no.3
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• pp.349-357
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• 2022

Drum Set are representative instruments that use grips in modern popular music. Depending on how and how clearly you hold the basic grip, it also affects your performance ability. The purpose of this study is to analyze the characteristics, strengths, and weaknesses of each grip, derive the resulting complex effects, and present practical application plans to the drummers. The research method is largely divided into traditional and matched grips, and in detail, German, American, French, and hybrid styles are included to analyze the performance method utilized. It also refers to the grip method of all drummers from the 1930s to the present, which was registered in Drummer World, an overseas drum site. This study proposed several application plans by classifying and analyzing the most basic grip methods in drum set in detail. I was able to see that the performance impact was different depending on the grip, and I think it will be more helpful for future performances if I understand both the positive and adverse functions of each grip and play it.

• Applied Chemistry for Engineering
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• v.26 no.1
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• pp.111-115
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• 2015

Two new analogs of bestatin were prepared from $\small{D}$-leucine and $\small{D}$-valine in a stereoselective and efficient way. An aminopeptidase inhibitor bestatin shows significant biological effects on immunomodulation and is marketed for the treatment of acute myelocytic leukemia. The key intermediates, trans-oxazolidine methyl esters 2a and 2b, were obtained with more than 20 to 1 stereoselectivity in a one-pot procedure by the three cascade reactions between N-hydroxymethyl protected ${\alpha}$-amino aldehydes (4a and 4b) and phenylsulfonylnitromethane ($PhSO_2CH_2NO_2$) and the following in-situ ozonolysis. Basic hydrolysis of 2a and 2b, and then the peptide coupling with $\small{L}$-Leu-OMe produced the protected derivatives of two new bestatin analogs, 3a and 3b, respectively. The new isobutyl and isopropyl analogs of bestatin (1a and 1b) were produced in overall 51% and 38% yields, respectively, with high stereoselectivity from the corresponding protected ${\alpha}$-amino aldehydes 4 in a six-step process.

• The Transactions of the Korea Information Processing Society
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• v.5 no.10
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• pp.2533-2545
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• 1998

객체지향 소프트웨어척도는 객체들의 규모와 구성 및 객체들간의 관계를 고려하면서, 전반적인 객체지향 특성을 반영하여야 한다. 본 논문에서는 객체지향 소프트웨어의 규모 및 복잡도에 영향을 주는 4가지의 객체지향 패러다임 관련 특성(요인)들을 정하고, 객체지향 설계 스타일 지침들을 기반으로 객체지향 소프트웨어의 품질 측정을 위한 객체점수 척도를 제안한다. 그 지침들은 기존의 지침들에 하나의 새로운 지침을 추가한 것으로서 인지 심리학에서의 청크 이론을 기반으로 제시 된 것들이다. 제안된 객체점수 척도의 타당성 검증을 위해서 실험적 분석을 행하였는데, 이는 제안 척도가 전반적으로 객체 지향 개념 및 특성을 잘 반영하는지를 평가하기 위한 것으로 같은 출력을 갖는 두 C++ 프로그램을 제안된 척도로 측정하여 비교하였다. 이러한 실험 결과 제안한 객체점수 유용성이 입증되었다.