• Title/Summary/Keyword: importance sampling (IS)

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The nail store's store attributes on revisit intensity - focus on independent stores - (네일매장의 점포속성이 재방문의도에 미치는 영향 - 단독 매장을 중심으로 -)

  • Lim, Yun-Kyoung;Kwak, Tai-Gi
    • Journal of the Korea Fashion and Costume Design Association
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    • v.22 no.2
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    • pp.45-59
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    • 2020
  • The purpose of this study was to clarify that the effect of consumer's perception of nail store attributes has on intent to revisit (focus on independent stores) by performing quantitative research. The importance of nail stores is increasing with sales amounts and the number of workers, however, previous research in this area is not complete. The reason that this qualitative research should be done before the quantitative research is due to the scant theoretical background in this matter. As the nail market is steadily increasing, determining the factors to make a successful and influential store leading to revisits is very meaningful both academically and in business. For the quantitative study, consumers from 20 years old to less 60 years old who had purchased nail service at independent nail stores were included in the survey. Quota sampling was adopted in the areas where the independent nail stores were located from May 10th to May 30th, 2019, and 262 questionnaires were collected, and those containing insincere respondences were excluded. The most important nail store attribute was reliability (store name value, relationship with workers and A/S) and then the physical environment, economics, product, and promptness. The result depended on demographic factors- younger and lower-income respondents put a premium on the physical environment, promptness, and economics, on the other hand, older and higher-income respondents placed a priority on reliability. The correlation analysis result is that all store attributes (reliability, physical environment, economics, promptness, product) show a statistical significance. A multiple regression analysis was conducted to determine the effects of nail store attribute importance on revisit intention. Promptness, economics, and the physical environment have a statistically significant effect on the consumer's revisit intention.

NIR DIODE ARRAY SPECTROMETERS ON AGRICULTURAL HARVEST MACHINES OVERVIEW AND OUTLOOK

  • Rode, Michael
    • Proceedings of the Korean Society of Near Infrared Spectroscopy Conference
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    • 2001.06a
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    • pp.1172-1172
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    • 2001
  • Compact Near Infrared Diode Array Spectrometers offer new possibilities for on line quality assurance in the agricultural sector. Due to their speed and complete robustness towards temperature fluctuations and mechanical shock Diode Array Spectrometers are suitable for the use on Agricultural Harvest Machines. The growing consumer consciousness of food quality in combination with falling manufacturing prices demands procedures for an effective quality control system. The various conventional types of NIR instruments which have so far been used in laboratories are unsuitable for mobile applications under the rough conditions of field cropping not only because of their slow speed of measurement but also because of their shock sensitive filter wheels and monochromators necessary for fractionating polychromatic light. Another advantage of the on line use is the reduction of the sampling error because of the continuously measurement of the whole product. Considering the large economic importance of the dry matter content on agricultural products it is of particular advantage that water belongs to those constituents which are most easily assessed in the near infrared. While other constituents of economic importance such as starch, oil and protein in grains and seeds have a much lesser effect on NIR signals, their contents can nonetheless be assessed with high analytical precision on freshly harvested grains and seeds. In the last years several applications for on line quality assessment on harvesting machines were developed and tested. The talk will give an overview and outlook on existing and future possibilities of this new field of NIR applications.

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Residual spatial autocorrelation in macroecological and biogeographical modeling: a review

  • Gaspard, Guetchine;Kim, Daehyun;Chun, Yongwan
    • Journal of Ecology and Environment
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    • v.43 no.2
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    • pp.191-201
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    • 2019
  • Macroecologists and biogeographers continue to predict the distribution of species across space based on the relationship between biotic processes and environmental variables. This approach uses data related to, for example, species abundance or presence/absence, climate, geomorphology, and soils. Researchers have acknowledged in their statistical analyses the importance of accounting for the effects of spatial autocorrelation (SAC), which indicates a degree of dependence between pairs of nearby observations. It has been agreed that residual spatial autocorrelation (rSAC) can have a substantial impact on modeling processes and inferences. However, more attention should be paid to the sources of rSAC and the degree to which rSAC becomes problematic. Here, we review previous studies to identify diverse factors that potentially induce the presence of rSAC in macroecological and biogeographical models. Furthermore, an emphasis is put on the quantification of rSAC by seeking to unveil the magnitude to which the presence of SAC in model residuals becomes detrimental to the modeling process. It turned out that five categories of factors can drive the presence of SAC in model residuals: ecological data and processes, scale and distance, missing variables, sampling design, and assumptions and methodological approaches. Additionally, we noted that more explicit and elaborated discussion of rSAC should be presented in species distribution modeling. Future investigations involving the quantification of rSAC are recommended in order to understand when rSAC can have an adverse effect on the modeling process.

Measurement Coding for Compressive Sensing of Color Images

  • Dinh, Khanh Quoc;Trinh, Chien Van;Nguyen, Viet Anh;Park, Younghyeon;Jeon, Byeungwoo
    • IEIE Transactions on Smart Processing and Computing
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    • v.3 no.1
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    • pp.10-18
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    • 2014
  • From the perspective of reducing the sampling cost of color images at high resolution, block-based compressive sensing (CS) has attracted considerable attention as a promising alternative to conventional Nyquist/Shannon sampling. On the other hand, for storing/transmitting applications, CS requires a very efficient way of representing the measurement data in terms of data volume. This paper addresses this problem by developing a measurement-coding method with the proposed customized Huffman coding. In addition, by noting the difference in visual importance between the luma and chroma channels, this paper proposes measurement coding in YCbCr space rather than in conventional RGB color space for better rate allocation. Furthermore, as the proper use of the image property in pursuing smoothness improves the CS recovery, this paper proposes the integration of a low pass filter to the CS recovery of color images, which is the block-based ${\ell}_{20}$-norm minimization. The proposed coding scheme shows considerable gain compared to conventional measurement coding.

Performance of Image Reconstruction Techniques for Efficient Multimedia Transmission of Multi-Copter (멀티콥터의 효율적 멀티미디어 전송을 위한 이미지 복원 기법의 성능)

  • Hwang, Yu Min;Lee, Sun Yui;Lee, Sang Woon;Kim, Jin Young
    • Journal of Satellite, Information and Communications
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    • v.9 no.4
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    • pp.104-110
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    • 2014
  • This paper considers two reconstruction schemes of structured-sparse signals, turbo inference and Markov chain Monte Carlo (MCMC) inference, in compressed sensing(CS) technique that is recently getting an important issue for an efficient video wireless transmission system using multi-copter as an unmanned aerial vehicle. Proposed reconstruction algorithms are setting importance on reduction of image data sizes, fast reconstruction speed and errorless reconstruction. As a result of experimentation with twenty kinds of images, we can find turbo reconstruction algorithm based on loopy belief propagation(BP) has more excellent performances than MCMC algorithm based on Gibbs sampling as aspects of average reconstruction computation time, normalized mean squared error(NMSE) values.

Adoption Process of Chinese Students to Korean Food Based on Residence periods (중국유학생의 거주기간에 따른 한국음식 확산)

  • Han, Kyung Soo;Min, Ji Eun
    • Journal of the Korean Society of Food Culture
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    • v.34 no.4
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    • pp.411-423
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    • 2019
  • This study conducted qualitative research through in-depth interviews on the diffusion process of Korean food in accordance with the length of residence of Chinese students in Korea. As the analysis method, the qualitative analysis method such as NVivo12.0 was used, and the analysis was performed through word frequency, word cloud, and coding matrix. The images of taste of Korean food were revealed as 'Spicy', 'Sweet', and 'Light taste' by both short-term Chinese residents and long-term Chinese residents. The long-term Chinese residents showed their dissatisfaction with the institutional food, and they also pointed out the importance of the matter of cooking for quick adaptation to life in Korea. The long-term Chinese residents also thought of Korean food as 'High-fiber food', and this was influenced by the 'Less-oil' cooking method of Korean food, which is different from the cooking method of Chinese food. The length of residence was used as a main variable of this study, and it was one of the factors having positive effects on the diffusion of Korean food and acculturation. It would be difficult to generalize the results because this study used the convenience sampling method and snowball sampling.

An Analysis on the Reduction of Measurement Time Using Interpolation Algorithm in Near-field RCS Measurements for Aircraft Shape (항공기 형상에 대한 근전계 RCS 측정에서 내삽 알고리즘을 이용한 측정시간 단축에 대한 분석)

  • Park, Homin
    • Journal of the Korea Institute of Military Science and Technology
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    • v.25 no.4
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    • pp.339-346
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    • 2022
  • The importance of stealth technology is increasing in modern warfare, and Radar Cross Section(RCS) is widely used as an indicator of stealth technology. It is useful to measure RCS using an image-based near-field to far-field transformation algorithm in short-range monostatic conditions. However, the near-field measurement system requires a longer measurement time compared to other methods. In this work, it is proposed to reduce the measured data using an interpolation method in azimuth angular domain. The calculated far-field RCS values according to the sampling rate is shown, and the performance of the algorithm applied with interpolation in the angular domain is presented. It is shown that measurement samples can be reduced several times by using the redundancy in the angular domain while producing results similar to the conventional method.

Frequency and Importance of Nurse's Job in New Graduate Nurses Working in Musculoskeletal Ward (근골격계 병동 신규간호사의 간호직무 수행도와 중요도)

  • Lim, Nan-Young;Yun, Soon-Nyung;Kim, Jeong-Eun;Lee, Young-Sun;Jung, Yeon-Yi;Song, Jung-Hee
    • Journal of muscle and joint health
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    • v.13 no.2
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    • pp.108-118
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    • 2006
  • Purpose: The purpose of this study was to examine comparison in the frequency and importance of nurse's job in new graduate nurses working in musculoskeletal ward. Method: A descriptive design was used with convenience sampling of 72 new graduate nurses working in musculoskeletal ward of the 2 hospitals with over 500 beds. Data were collected using a structured questionnaire. Results: 1) The total score for frequency of nurse's job was $2.57{\pm}.41$ and the total score for importance of nurse's job was $3.00{\pm}.37$. 2) The most frequent category was to manage for a medication and the most frequent item was to administer a medication in the order. 3) The most important category was to control of tissue perfusion and the most important item was to keep the aseptic techniques. 4) The frequencies among the work places were different significantly in 3 categories. 5) The importances among the work places were different significantly in 2 categories. Conclusion: New graduate nurses perceived the importance than the frequency of nurse's job. Also check or analysis the vital sign and nurses job associated with medication were higher score. Therefore, further research is needed to develop the educational strategies to strengthen not only theory also practice.

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Nurse's Role Performance and Perception of the Importance of Role among Nurses Practicing in a Cancer Care Facility (암 전문병원 간호사의 간호역할 수행도와 중요도)

  • Chae, Young Hee;Lee, Won Hee;Min, Young Mi;Shin, A Mi;Kim, Hyang Mi
    • Journal of Korean Clinical Nursing Research
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    • v.19 no.3
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    • pp.407-418
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    • 2013
  • Purpose: The purpose of this study is to examine the nurse's role performance and the perception of the importance of role among nurses practicing in a cancer care facility. Methods: A descriptive study design was applied with convenient sampling of 175 nurses working at a cancer care facility in Daegu, Korea. Data was collected using a structured questionnaire from July 1, 2013 to July 5, 2013. Results: Cancer care facility nurse's role performance score was measured on average $3.23{\pm}0.64.$ Oral medication was the most frequently performed role, followed by encouragement, care related to medication, and pain management. The perception of the importance of nurse's role was measured on average $3.31{\pm}0.35$. Care related to medication was regarded as the most important, followed by transfusion, oral medication, and intravenous & intramuscular medication. Nurse's role performance was different according to nurse's age (F=3.21, p=.024) and current practice area (F=3.73, p=.012). The perception of the importance of nurse's role was different only in relation to current practice area (F=6.82, p<.001). Conclusion: Nurses practicing in oncology setting frequently involve encouraging patients and pain management. Training programs designed to facilitate frequently performed and highly regarded nurse's roles are required for nurses practicing in oncology setting.

A Study on the Importance of Contents in Middle-School Home-Economics (중학교 가정과 교육내용의 중요성에 관한 연구 -전북지역을 중심으로-)

  • 박일록
    • Journal of Korean Home Economics Education Association
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    • v.9 no.2
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    • pp.69-85
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    • 1997
  • The purpose of this study was to identify the important contents from teachers’, parents’and students’view points based on the sixth Home Economics textbook contents, to apply these results at school settings and to provide the materials as a basis for the next curriculum revision. Subjects were 59 teachers, 253 parents, and 389 students from 3 cities and 5 counties in CholaBukDo. A questionnaire which was made by the researcher was used as an instrument for this study. The results are as follows: Of 32 contents on Family life subarea, all the teachers, the parents and the students put the emphasis on sex such as pregnancy, purity, sex-ethics, etc. This result means that middle-school students emphasized the sexual identity formation and this was also a common concern about adolescents in our society. Of 37 contents of Managing home resource and Consumer life subarea, teachers though the environment pollution is an important subject and parents and students thought finding a method to conserve good environment were more important. This result reflects their concern on the environment. Of 49 contents on Dietary life, teachers and parents emphasized “the importance of nutritive elements”which is basic on their dietary life and students were more interested in “adolescence and growth and development among adolescents’nutritional characteristics and problems”which is more related to their current life. Of 40 contents on Clothing life subarea, while teachers put the emphasis on the method how they can buy ready-made clothes, parents and students wanted them to teach what kind of clothes are suitable for themselves. Of 18 contents on Residing life subarea, teachers emphasized the importance of ventilation for adjusting the room environment and students were more interested in the effective use of the residing space. By finding out what kinds of Home-economics contents are important from the view point of teachers, parents and students, this study can be a useful resource for the next curriculum revision and for selecting contents of a new-coming text book. However, restricted sampling must be considered and further studies which cover the whole area might be needed.

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