• The Journal of the Acoustical Society of Korea
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• v.14 no.3
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• pp.14-27
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• 1995

This paper presents the digital music sound DSP by using ADPCM and Perceptual Transform Corder in MPEG to compress sound data and minimize the quantization noise for musical instrument. these method are utilized to develop algorithm of equal power density envelope. And these results are applied to examine the specific characteristics of musical instrument and determine the compression method. The design of new RISC DSP which generates 32 voices of musical instrument simultaneously and the coding of 200 musical instrument sound data in 1MByte memory shows that these algorithm is very useful to regenerate musical sound by using the minimum size of memory.

• Journal of the Korea Fashion and Costume Design Association
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• v.16 no.2
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• pp.189-194
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• 2014

Drape property, one of the dynamic properties, is significant element of appearance and silhouette of garment. There are two methods of measuring drape property: objective method and subjective method. The purpose of this study is to search convenient method of measuring drape property which affects the appearance of garment. The method of this study was as below: First, the drape properties of ten various fabrics were measured within both of professional paper ring and visual handy measuring instrument. Second, Pearson's correlation coefficient was analyzed in order to analyze the correlation of two results of the experiments. This study used professional paper ring and visual handy measuring instrument on ten samples. Both of the results from the paper ring and visual handy measuring instrument were very similar in terms of drape property. Significant correlation between results of the professional paper ring and visual handy method indicates the efficiency of the visual handy measuring at school or work environment etc.

• Science of Emotion and Sensibility
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• v.17 no.3
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• pp.129-142
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• 2014

Due to the increase of the aged population and population of the disabled today, there is a growing demand for rehabilitation medical instruments. Furthermore, there is a growing demand for evaluation indices for services that should be provided for uses of the rehabilitation medical instruments. In order to evaluate rehabilitation medical instrument designs in this study, the basic index for design evaluations shall be identified to search for assessment plans. Through this, new evaluation indices will be deduced through discussions and analysis of rehabilitation medical experts, biomedical engineers, and designers. The results of this study are summarized as follows. First, the existing design evaluation indices were collected and analyzed to construct 10 rehabilitation medical instrument design evaluation indices and 44 sub-evaluation items. These will be important evaluation standards for designing rehabilitation medical instruments in the future. Second, the design evaluation indices that must be taken into consideration when developing health care rehabilitation medical instruments are the 10 design evaluation indices of usability, cognition, safety, learning, motility, durability, economic feasibility, space, aesthetics and environmental aspects. Third, design evaluation indices of environment, space, cognition, usability, economic feasibility and aesthetics are indices that must be taken into consideration for product design, while learning, safety, motility and durability are factors that must be given special consideration for rehabilitation medical instrument design evaluation indices. Fourth, if existing product design evaluation indices placed importance on environment, space, cognition, usability, economic feasibility and aesthetics of products for design evaluation indices, rehabilitation medical instrument design evaluation indices placed importance on learning, safety, motility and durability on top of usability and economic feasibility, which are the differences between the design evaluation indices of rehabilitation medical instrument and other product designs. The 10 rehabilitation medical device design evaluation indices and 44 sub-evaluation items were carried out in this study. This research is only on the overall rehabilitation medical device design evaluation indices. In future research, the evaluation indices will be applied in the actual rehabilitation medical design device through production of prototypes, while making revisions and supplementations where necessary.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2295-2297
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• 2004

원자로의 제어봉 구동장치에 공급되는 전력을 제어하는 전력함 전력제어기는 DSP를 이용하여 디지털 시스템으로 설계하였다. 전력제어기는 Master/Slave 형태로 이중화되어 신뢰성이 향상시켰고 전력제어기의 CPU 보드에는 제어용과 통신용 두 개의 DSP를 사용하여 전력제어기의 주 기능인 제어/감시와 통신 기능을 분리하여 담당시켰다. 전력제어기에 요구되는 이러한 기능들을 효과적으로 수행하도록 CPU 보드에 디지털 논리구현 장치인 FPGA를 설치하여 메모리 주소 및 각 부품의 칩 선택 신호를 생성, 이중화 전력제어기 상호간 신호 수수, 각종 고장 검출 및 점호각 신호 발생 등의 역할을 하도록 하였다.

• Journal of Korean Elementary Science Education
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• v.27 no.2
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• pp.201-209
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• 2008

The purpose of this study was to develop an instrument for evaluating quality of the web site about elementary science education. Eight experienced specialists (three elementary science education specialists and five elementary school teachers engaging) in elementary science education verified content validity twice. The evaluation criteria for elementary school science were considering aspects of the characteristic and the quality of web site. The evaluation criteria can be categorized as being in five areas, fifty-seven items. The five areas were a purpose, a credibility, an efficiency, a data-type, an interactivity. Four web sites were analyzed for the subject of this study. Evaluators were nine elementary school teachers, who were educated in the use of instrument. The developed evaluation instrument in this study is considered valid and reliable. The content validity is 91.1%, and the reliability has a Cronbach's ${\alpha}$ of .82. The developed evaluation instrument in this study will verify the quality of web site, provide teachers and students with efficient information about elementary science education. In addition it suggests guidelines about design and devise web site to instructional developer or subject-matter expert.

• Journal of the Korean Society for Precision Engineering
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• v.27 no.4
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• pp.33-39
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• 2010

Manufacturing accuracy of a precision instrument was essential to stability and efficiency of the product. Accordingly, geometrically accuracy management of precision instrument was very becoming the technique in order to design and manufacturing for machine. In this study, Measuring System is developed for extra long roller using non-contact sensor. Futhermore, It's studied by Geometric Tolerance. Exact roundness is obtained to Least Squares method from the reference circle of measured data. Measuring System is analyzed point of measurement and straightness of extra long roller is evaluated by FEM.

• Proceedings of the Korea Society of Design Studies Conference
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• 2004.05a
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• pp.232-233
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• 2004

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.2362-2366
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• 2003

The paper describes a new instrument for early detection of Alzheimer's disease. A new instrument for early detection of Alzheimer's disease is constructed on both the questionnaire for the investigation of living environment, and the lists for the functional tests of the sense, the physiology, and the left and right brains. When the medical doctor has made a diagnosis of Alzheimer's disease, the demented patient does not recover the indication adding available treatments. Then, the indication of a patient only takes a turn for the worse. For the demented patient can be kept his/her life style, Alzheimer's disease can make an early detection using a new instrument before a diagnosis of the dementia. And the indication of a demented patient can be delayed by the available medical treatments.

• Structural Engineering and Mechanics
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• v.72 no.6
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• pp.763-774
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• 2019

The main aim of this paper is enhancing design of traditional laminated composite plates subjected to static loads. In this regard, this paper suggests embedding a lightweight porous layer in the middle of laminated composite as the core layer of the resulted sandwich plate. The static responses of the suggested structures with uniform, symmetric and non-symmetric porosity distributions are compared to optimize their design. Using the first order shear deformation theories, the static governing equations of the suggested laminated composite plates with a porous layer (LCPPL) rested on two-parameter foundation are obtained. A finite element method is also utilized to solve the governing equations of LCPPLs. Effects of laminated composite and porosity characteristics as well as geometry dimension, edges' boundary conditions and foundation coefficients on the static deflection and stress distribution of the suggested composite plates have been investigated. The results reveal that the use of core between the layers of laminated composites leads to a sharp reduction in the static deflections of LCPPLs. Furthermore, in compare with perfect cores, the use of porous core between the layers of laminated composite plates can offer a considerable reduction in structural weight without a significant difference in their static responses.

• Journal of Korean Clinical Nursing Research
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• v.14 no.1
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• pp.85-97
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• 2008

Purpose: This study was conducted to develop an organizational instrument on socialization for new graduate nurses in the workplace, and to test its reliability and validity. Method: A methodological design was used to develop the instrument. Data were collected from new clinical nurses in 188 hospitals nationwide in Korea. In the first stage, 159 items were developed through a literature review. In the second stage, seven experts conducted a content validity test and the number of items was reduced to 155. In the third stage, factor analysis was performed to analyze the data collected from 198 nurses in 8 hospitals using the modified instrument. A total of 65 items were included and a five-point Likert scale was used. In the fourth stage, the final evaluation instrument was finalized as comprising 11 factors in 7 domains, using 39 items developed from analysis of the data collected from 1,410 nurses using the 40 items. It was comprised of 11 factors in 7 domains. The SPSS 11.0 windows program was used. Results: Accumulated variation for the 11 factor-39 items nurse organizational instrument on socialization was 67.22%. The results of the reliability test indicated that Cronbach's coefficient for the total 39 items was over 0.97. Conclusion: The instrument developed in this study has a high degree of reliability and validity.