• Title/Summary/Keyword: Meaningful Work

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Studies on Ceramic Powder Fabrication from Rice Phytoliths I. Pulverization of Bice Husks Using Rotating Knife Cutting Method and Changes of Their Densities (벼의 규소체로부터 세라믹 분말제조에 관한 연구 I. 회전칼날절단 방식에 의한 왕겨 분화와 그에 따른 밀도변화)

  • 강대갑
    • Journal of Powder Materials
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    • v.2 no.2
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    • pp.135-141
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    • 1995
  • As the first step of study on fabrication of ceramic powders from phytoliths in rice, especially in rice husks, pulverization method of rice husks and the properties of milled rice husks were investigated. Impact methods, such as ball milling, were not meaningful for pulverizing elastic and thin fabric structure of rice husks. The most effective one was cutting method. In the present work, a rotating knife cutting method was applied to pulverizing rice husks. A 40-mesh screen was inserted under the rotating knives. The most portion of the milled powder was found in -50/+100 mesh section. Morphology of the milled rice husks revealed that the husks larger than 70 mesh were flake-like shape, at -70/+100 mesh section relatively equi-axed shape, at -170/+325 mesh section rod-like shape, and below 325 mesh section dust-like shape. Tap density of raw rice husks was about 0.1 $g/cm^3$, while those of milled rice husks were over $0.4 g/cm^3$. This meant that, for a given volume of reactor, raw material charge can be increased more that 4 times when using milled rice husks than unmilled one. True densities of unmilled and milled rice husks were higher than $1.4 g/cm^3$, and increased with decreasing milled sizes.

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Extraction of User Preference for Video Stimuli Using EEG-Based User Responses

  • Moon, Jinyoung;Kim, Youngrae;Lee, Hyungjik;Bae, Changseok;Yoon, Wan Chul
    • ETRI Journal
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    • v.35 no.6
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    • pp.1105-1114
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    • 2013
  • Owing to the large number of video programs available, a method for accessing preferred videos efficiently through personalized video summaries and clips is needed. The automatic recognition of user states when viewing a video is essential for extracting meaningful video segments. Although there have been many studies on emotion recognition using various user responses, electroencephalogram (EEG)-based research on preference recognition of videos is at its very early stages. This paper proposes classification models based on linear and nonlinear classifiers using EEG features of band power (BP) values and asymmetry scores for four preference classes. As a result, the quadratic-discriminant-analysis-based model using BP features achieves a classification accuracy of 97.39% (${\pm}0.73%$), and the models based on the other nonlinear classifiers using the BP features achieve an accuracy of over 96%, which is superior to that of previous work only for binary preference classification. The result proves that the proposed approach is sufficient for employment in personalized video segmentation with high accuracy and classification power.

Rh-doped carbon nanotubes as a superior media for the adsorption of O2 and O3 molecules: a density functional theory study

  • Cui, Hao;Zhang, Xiaoxing;Yao, Qiang;Miao, Yulong;Tang, Ju
    • Carbon letters
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    • v.28
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    • pp.55-59
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    • 2018
  • Transition-metal-embedded carbon nanotubes (CNTs) have been accepted as a novel type of sensing material due to the combined advantage of the transition metal, which possesses good catalytic behavior for gas interaction, and CNTs, with large effective surface areas that present good adsorption ability towards gas molecules. In this work, we simulate the adsorption of $O_2$ and $O_3$ onto Rh-doped CNT in an effort to understand the adsorbing behavior of such a surface. Results indicate that the proposed material presents good adsorbing ability and capacities for these two gases, especially $O_3$ molecules, as a result of the relatively large conductivity changes. The frontier molecular orbital theory reveals that the conductivity of Rh-CNT would undergo a decrease after the adsorption of two such oxidizing gases due to the lower electron activity and density of this media. Our calculations are meaningful as they can supply experimentalists with potential sensing material prospects with which to exploit chemical sensors.

Analysis of the home expenditure by home account book (가게부를 통해 본 소비 지출비의 특별분석)

  • 현기순
    • Journal of the Korean Home Economics Association
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    • v.8 no.1
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    • pp.159-180
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    • 1970
  • Forty-five home account books were randomized by electing "prize for good home manager" in 1967 through all over the country in korea. With this sampling analyzed monthly home expenditure in different item by test of significance, and compared with model of home expenditure and this results. Hope this analysis will help to the house wife for better plan home expenditure and will develope in scientific way of life in home managing. 1. Significance test of home account books in their items and in months indicated that there were significant statistical differences in the total living expenses. In other words, they did not work out a budget, and their home account books were nothing but a record expenses. 2. There was a significant difference in the monthly expenditure for food caused by the preparation of cabbage pickle (kim Jang) in November. This payment in a lump to the cabbage pickle brought about unbalance to home economic. 3. Compared with others, in November and in December we could find a meaningful difference in the monthly expenditure for clothing. 4. It was noted that there were not such comparable significant differences in months as to be mentioned for housing light and heating, education, saving, transportation and communication culture, taxes.

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Supervised Model for Identifying Differentially Expressed Genes in DNA Microarray Gene Expression Dataset Using Biological Pathway Information

  • Chung, Tae Su;Kim, Keewon;Kim, Ju Han
    • Genomics & Informatics
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    • v.3 no.1
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    • pp.30-34
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    • 2005
  • Microarray technology makes it possible to measure the expressions of tens of thousands of genes simultaneously under various experimental conditions. Identifying differentially expressed genes in each single experimental condition is one of the most common first steps in microarray gene expression data analysis. Reasonable choices of thresholds for determining differentially expressed genes are used for the next-stap-analysis with suitable statistical significances. We present a supervised model for identifying DEGs using pathway information based on the global connectivity structure. Pathway information can be regarded as a collection of biological knowledge, thus we are trying to determine the optimal threshold so that the consequential connectivity structure can be the most compatible with the existing pathway information. The significant feature of our model is that it uses established knowledge as a reference to determine the direction of analyzing microarray dataset. In the most of previous work, only intrinsic information in the miroarray is used for the identifying DEGs. We hope that our proposed method could contribute to construct biologically meaningful structure from microarray datasets.

An Efficient Visualization Method for Interactive Volume Rendering (대화식 볼륨 렌더링을 지원하는 효율적인 가시화 방법)

  • Kim, Tae-Young
    • Journal of the Korea Computer Graphics Society
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    • v.8 no.1
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    • pp.1-11
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    • 2002
  • In order to widely use volume rendering technology in practical fields, a user should be able to control the classification parameter interactively and extract a meaningful information easily from the 3D data as fast as it can be. Previous work on an accelerating volume rendering reconstructs an isotropic volume from an anisotropic one and classifies in pre-processing time and then renders the classified volume rapidly in run time. But, this traditional step may result in long pre-processing time and no real-time feedback. In this paper, we present an efficient classification and rendering method that allows a user to set the opacity transfer function interactively at rendering time on a personal computer without special-purpose hardware.

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A Study on the Analysis of Curriculums and the Improvements of Beauty Department in College -Focusing on Needs to Develop Beauty Styling Department- (2년제 대학 뷰티관련학과 교육과정 분석 및 개선방안에 관한 연구 -뷰티스타일리스트 전공개설의 필요성을 중심으로-)

  • Lee, Mi-Ryang;Lee, Kyung-Eun
    • Journal of the Korean Society of Fashion and Beauty
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    • v.2 no.2 s.2
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    • pp.71-80
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    • 2004
  • This study was conducted to propose name and role of a beauty-related specialist, a brand-new profession, recognizing that rapidly evolving culture and industries call for development of a new occupation in beauty business in the 21st century, and to suggest an approach to set up a department to produce such experts. To this end, extensive data and information were collected from relevant companies, education institutions, and all of the eighty two departments at 2-year junior colleges around the country, and were analyzed. The findings of the study are as follows: First, it was acknowledged that a new occupation distinct from existing ones is required in the beauty business. Secondly, the study has defined role of the new job; a professional beauty stylist who is competent to work across beauty, coordination and fashion with long-term perspective. Thirdly, the study suggested name of the brand-new occupation as beauty stylist. The results summarized above have meaningful implications; the study identified weaknesses of the existing beauty-related departments, and suggested practical approaches to improve them in order to provide effective education on the new profession, beauty stylist, and enhance adaptation capability.

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A Study on the Perception of Importance and Necessity to Carving Decoration in Hotel and Restaurant Cooks (호텔 및 레스토랑 조리사들의 카빙 데코레이션에 대한 중요도 및 필요성 인식에 관한 연구)

  • Kim, Gi-Jin;Eum, Tae-Sung;Shin, Jong-Ha
    • Culinary science and hospitality research
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    • v.14 no.4
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    • pp.150-160
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    • 2008
  • This study examines carving decoration which makes visual beauty and luxury mood upon serving foods to customers in the food service industry. 413 cooks working for hotels and luxury restaurants were investigated for how they need carving decoration. First, general importance upon serving foods to customers and upon carving decoration was examined; and it was considered if such importance shows statistically meaningful difference by cooks' general characteristics(e.g., gender, academic career, age, work experience). Also, this study explores the necessity of carving decoration in their situation. As a result, cooks regard carving decoration as very important, and its necessity was as high as cooking experience. In addition, necessity was high in buffet, Japanese foods and Chinese foods. A cook can provide visual pleasure to customers and heighten the artistry of foods with carving and decorating skills, so opening a relative course of study seems to be required in cooking-related fields and institutes in order to foster manpower with learned carving and decorating skills.

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Recognition of Nursing Students and Graduates on Nursing and Future Career (일개 간호대학생과 졸업생의 전공 및 진로에 대한 인식)

  • Bang, Kyung-Sook;Cho, Jin-Kyong
    • The Journal of Korean Academic Society of Nursing Education
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    • v.14 no.1
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    • pp.88-97
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    • 2008
  • Purpose: This study was done to develop strategies for better education and career adaptation of nursing students by investigating the recognition and intentions of nursing students and graduates on the nursing and a future career. Method: Data was collected from a survey conducted between the 1st of October and 5th of December, 2007. Participants were 113 students and 37 graduates of one nursing college. Result: The majority of participants thought that atmosphere and relationships were important criteria to choose a job. Most of them selected nursing major not because their aptitude but because of its professionalism and job stability. Most wanted to go to graduate school and were interested in a nurse specialist program, especially for critical and emergency care. The preferred nursing role changed from recovery care to health promotion as they advanced in their studies. They thought work overload and fatigue from three shift as barriers for a longer stay as a clinical nurse. Conclusion: This study is meaningful in a way that it suggests some strategies for promoting nursing professionalism and adaptation to working field. In order to generalize the results of this study, replicate studies need to be conducted with nation-wide samples.

Study on Analyzing Main Cause of Dental Technicians' Moraleand Management to Promote their Morale (치과기공사의 사기 요인 분석과 관리 방안에 대한 연구)

  • Kim, Jung-Sook
    • Journal of Technologic Dentistry
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    • v.26 no.1
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    • pp.129-138
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    • 2004
  • The organization to which we belong is the place where we make social relationships, satisfy our desires of self-realization, and accomplish our common object. The emotional and psychological state of individual as well as the whole organization is able to be explained in the concept of morale. The researcher selected a total 238 dental technicians living in seoul, and conducted a research in a period ranging from April 1, 2004, to April1 10, 2004. The researcher analyzed the findings with the aid of SPSS (Statistical package for social sciences). The researcher came to reach the following conclusions on the basis of frequency, percentage, T-test, F-test, and multiple regression. The results of this study were as follows: First, there is a significant difference in recognizing morale due to their age, academic background, their work places, position, part of objective, and working hours(p<.05). Secondly, The researcher there is a significant difference in recognizing due to their social welfare, payment, fair and objective personnel management, enough opportunities of self development, and autonomy(p<.05). Lastly, this study is very limited in generalization because it deals with a small part of morale management plans and objectifies very limited organization. But, it is very meaningful in trying to approach morale management plans with an object of dental technicians. It is necessary that dental technicians should make efforts to control themselves.

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