• Title/Summary/Keyword: Effects of task evaluation

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Efficacy Evaluation of Anti-wrinkle Products in Japan

  • Masaki Hitoshi
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.29 no.2 s.43
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    • pp.67-77
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    • 2003
  • Two categories of cosmetic products, cosmetics and quasi-drugs, have been established by the Ministry of Health, Labor and Welfare (MHLW) in Japan. Japanese pharmaceutical law has defined that products categorized as cosmetics do not exhibit any effects on human skin. In fact, cosmetic products are not permitted to claim any efficacy. On the other hand, products in the quasi-drug category can claim several efficacies such as anti-inflammatory effects, whitening/lightning effects, hair growth effects and so on. Unfortunately, the Japanese MHLW has not yet approved the efficacy of anti-aging/anti-wrinkle effects as a claim point. However, the population is aging, and the demand for anti-aging/anti-wrinkle products is increasing year by year. Japanese cosmetic companies have proposed to the MHLW that anti-aging/anti-wrinkle agents be approved as a claim concept of a quasi-drug. However, unified evaluation methods for anti-aging/anti-wrinkle effects have not been established. Currently, each company evaluates the efficacy of products/materials using their own original methods. Thus, to request approval of the MHLW, the establishment of a unified evaluation method is needed. Consequently, the Japan Cosmetic Industry Association (JCIA) has established a task force to develop guidelines for evaluating anti-wrinkle effects in 1998. In conclusion, the JCIA would like to adopt visual and image analysis scales to evaluate the anti-wrinkle effects objectively. Generally, wrinkles are roughly classified into three groups as fine wrinkles, linear deep wrinkles and crow's feet. However, academic societies of dermatology or cosmetics have not yet established a definition of wrinkles in Japan. Thus, in advance of setting up an evaluation method, the definition of wrinkles f3r evaluation must be decided. Wrinkles are defined by the task force of the JCIA as follows; furrows that people can recognize visually and that appear on the forehead, the corners of the eyes and the backs of the neck with aging. In addition, furrows are emphasized by exposure to solar light and by dry conditions. Visual evaluation is the most sensitive method and can be applied to most types of wrinkles. However, visual evaluation is hard to express digitally as results. Besides, in the case of image analysis, comparisons of data obtained from distinct examinations can not be done, because data from image analysis are relative values. Thus, to enhance the reliability of the evaluations, the adoption of an objective scale was required. The principle of the evaluation method is to analyze images taken from silicone replicas of wrinkle areas using several parameters, such as the proportion of the wrinkle $area({\%})$, the mean depth of the wrinkles (mm), the mean depth of the deepest wrinkle (m) and the deepest point on the deepest wrinkle. Lights are shown on the skin replica from an orthogonal direction of the main orientation of the wrinkle, and the resulting shadow images are quantified by the image analysis method. To increase the precision of the data or to allow comparisons of independent examinations, a scale with furrows of several depths, 200, 400, 600, 800, and $1000{\mu}m$, is adapted in the evaluation system. I will explain the guidelines established by the JCIA in the presentation.

The Study on Affecting Subject Accomplishment by Noise (소음이 과제수행에 미치는 영향에 관한 연구)

  • Kim, Sung-Cheol;Park, Keun-Sang;Kim, Kwan-Woo
    • Journal of the Ergonomics Society of Korea
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    • v.29 no.1
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    • pp.121-128
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    • 2010
  • The purpose of this study is to confirm the impact of noise on subject accomplishment as well as physical/mental load, and evaluates the effects of noise-masking and earplug. 15 college students participate in the test, and the comparison is performed by executing four projects according to conditional categories of noise environments; control condition, noise condition, earplug condition, and noise-masking condition. Noise in the field site of the H manufacturer was used as the noise source, the general job aptitude test which consist of linguistic ability, math ability, perception ability, reasoning ability was used as the task of this project. To estimate physical/mental load evaluation, we used the heart rate R-R interval, Criteria flicker fusion frequency(CFF) and measured NASA-TLX workload for subjective evaluation. As the research outcome, it is shown that there is a meaningful difference for the project task score, dropping rate of CFF, the heart rate, and NASA-TLX subjective evaluation score according to conditions of noise environment. Therefore, the impact of noise on capability of subject accomplishment as well as physical/mental load was confirmed along with the effects of using earplug and noise-masking.

A Study on Students Scientific Reasoning in Solving Pendulum Task

  • Yang, Il-Ho
    • Journal of The Korean Association For Science Education
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    • v.23 no.4
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    • pp.430-441
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    • 2003
  • The purpose of this study was to investigate the effects of students' prior knowledge on scientific reasoning in solving a pendulum task with a computer simulation. Subjects were 60 Korean students: 27 fifth-grade students from an elementary school and 33 seventh grade students from a middle school located in a city with 300,000 people. This study adapted a pendulum task presented with a computer simulation on which subjects would use a pattern of multivariable causal inferences. The subjects were interviewed individually in a three-phase structured interview by the researcher and three assistants while he/she was investigating the pendulum task. This study showed that most students across grades focused heavily on demonstrating the primacy of their prior knowledge or their current hypothesis. In addition, students' theories that are part of one's prior knowledge have a significant impact on formulating, testing, and revising hypotheses. Therefore, this study supported the notion that students' prior knowledge had a strong effect on students' experimental intent and hypothesis evaluation.

Development and Evaluation of an English Speaking Task Using Smartphone and Text-to-Speech (스마트폰과 음성합성을 활용한 영어 말하기 과제의 개발과 평가)

  • Moon, Dosik
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.16 no.5
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    • pp.13-20
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    • 2016
  • This study explores the effects of an video-recording English speaking task model on learners. The learning model, a form of mobile learning, was developed to facilitate the learners' output practice applying advantages of a smartphone and Text-to Speech. The survey results shows the positive effects of the speaking task on the domain of pronunciation, speaking, listening, writing in terms of students' confidence, as well as general English ability. The study further examines the possibilities and limitations of the speaking task in assisting Korean learners improve their speaking ability, who do not have sufficient exposure to English input or output practice due to the situational limitations where English is learned as a foreign language.

The Effects of Two Motor Dual Task Training on Balance and Gait in Patients with Chronic Stroke (이중운동과제 훈련이 만성 뇌졸중 환자의 균형 및 보행에 미치는 효과)

  • Cho, Ki-Hun;Lee, Wan-Hee
    • The Journal of Korean Physical Therapy
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    • v.22 no.4
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    • pp.7-14
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    • 2010
  • Purpose: The goal of this study was to investigate the effect of balance and gait ability through two motor dual task training in chronic stroke subjects. Methods: A group of twenty-five subjects who were six months post stroke participated in this study, where they were designated into pretest-posttest control The subjects were randomly allocated into two groups: experimental (n=13) and control (n=12). Both groups received physical therapy for 5 session 30 minutes per week during 6 weeks. Experimental group practiced additional two motor dual task training programs for thirty minutes a day, three days a week during six weeks. Evaluation of results was obtained through analyzing static balance, dynamic balance and gait function. Results: There was significant improvement among the group that practiced the additional two motor dual task training in that the postural sway area with open eye and close eye on the foam surface, the dynamic balance (p<0.05), and the gait function (p<0.05). Conclusion: Two motor dual task training improved static balance on the foam, dynamic balance, gait function. These results suggest that two motor dual task training is a feasible and suitable treatment for individuals with chronic stroke.

The Effect of Questions for Internal feedback on Functional Recovery and Task performance in chronic stroke patients (내재적 피드백을 위한 질문이 만성 뇌졸중 환자의 기능회복과 과제수행에 미치는 영향)

  • Sun, Hwa-Jung;Kim, Hee-Soo;Woo, Ji-Hea;You, Young-Youl
    • Journal of Korean Academy of Medicine & Therapy Science
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    • v.10 no.2
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    • pp.21-30
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    • 2018
  • Objective: The purpose of this study was to investigate questions and instructions for internal feedback effects on functional recovery and task performance while chronic stroke patients practised task-specific training. Method: Twenty-four chronic stroke patients were randomly divided into two groups; when patients performed same tasks, one was treated using questions and the other using instructions for internal feedback Both lasted 30 minutes, 5 times a week for 8 weeks. Outcome measures included Erasmus MC Modifications to the Nottingham Sensory Assessment (EmNSA), Measurement Properties of the Motor Evaluation Scale for Upper Extremity in Stroke patients (MESUPES), Chedoke Arm and Hand Activity Inventory (CAHAI), Korean version of Modified Barthel Index (K-MBI). Results: There were no significant differences between the two groups in EmNSA and K-MBI(p>.05). But, in MESUPES and CAHAI, there was significant difference between the two groups(p<.05). Conclusion: In this study, questions for internal feedback during task-specific training are more effective in improving upper extremity motor function and task performance than instructions for internal feedback.

The Effects of Upper Limb Reaching task on Upper Limb Function and Self-Efficacy for Patients with Stroke: Case Study (팔 뻗기 과제가 뇌졸중 환자의 상지기능 및 자기효능감에 미치는 영향에 대한 사례연구)

  • Song, Seung-Il;Cho, Young-Nam
    • Therapeutic Science for Rehabilitation
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    • v.3 no.2
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    • pp.59-69
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    • 2014
  • Objective : This study was done to see that upper limb reaching task have an effect on stroke patient's upper limb function and self-efficacy. Methods : The object of the study was done to see for diagnosed with stroke man on the thirty-ninth of this month. upper limb reaching task was done to see three times a for 6 week and by a per for thirty minutes. To find changing upper limb function and self-efficacy before-after upper limb reaching task, they were measured using Box & block test and self-efficacy scale. Results : Box & block test and self- efficacy scale were increased mark of revaluation, evaluation result than one of early evaluation result. Conclusion : Through this study, upper limb reaching task applied to stroke patient was found that it improved stroke patient's upper limb function and self-efficacy.

Usability Evaluation of a Window Button Arrangement (윈도우 버튼 배열 구조의 사용성 평가)

  • Kim, Tae-Hun;Han, Seong-Ho;Gwon, Min-Jeong;Lee, Seung-Hui
    • Journal of the Ergonomics Society of Korea
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    • v.25 no.2
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    • pp.23-32
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    • 2006
  • Window buttons located on a task bar provide information about windows that have been open as well as active. When the number of buttons on the task bar increases, the button size gets smaller and as a result, it is more difficult to identify. This study proposes new alternatives of presenting window buttons to search for a target button efficiently. An experiment was conducted to evaluate the usability of the new. Factors manipulated in the experiment include 'button arrangement methods' and 'order of buttons'. The 'button arrangement methods' factor is composed of three levels, 'one line', 'changeable line', and 'grouping buttons'. The 'order of buttons' factor is composed of three levels, 'fixed order', 'click-right', and 'order control by user'. The results showed that the main effects were significant in search time. In subjective satisfaction, the interaction effect was also significant. The results could be applied to the design of small screens such as PDA or cellular phones.

A Study on the Business Model of Fashion Mobile Commerce by Quality Evaluation (패션 모바일 커머스 품질 평가에 대한 비즈니스 모델 연구)

  • Na, Younkue
    • Journal of Fashion Business
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    • v.18 no.1
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    • pp.1-21
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    • 2014
  • This study exceeds the view on the fragmentary fact-finding surveys related to the application of mobile commerce which further develops the evaluation model of fashion mobile commerce website and considers the validity of comprehensive fashion mobile commerce with quality evaluation factors according to the Task-Technology Fit. To fulfill the study objectives, a total of 433 questionnaires are being conducted to the customers with first-hand experience on fashion merchandises through mobile commerce. The judgement sampling method is employed according to the sample population ages from 20s to 30s during two months period. Based on the results of the above-mentioned path analysis, we have observed the following: First, the path relation analysis results show that the M-marketing (M-marketing) between perceived usabilities had effects to the perceived usability and the M-sales had effects to the perceived usability. Second, as seen from the fashion mobile shopping conformance (TTF), the perceived usability, customer satisfaction, and path pipe analysis result conformances between perceived values and immersions have effects of perceived usability, customer satisfaction and perceived value, and thus, indicate that the perceived usability had effects on the customer satisfaction and immersion. Third, the customer satisfaction, perceived value and immersion all have effects on the purchasing intention.

A Study on Factors and Evaluation for the Ergonomic Design of Military Backpack (전투용 배낭의 인간공학적 설계를 위한 변수 및 평가에 관한 연구)

  • Kim, Dong-Jin;Cha, Kyoung-Hwan
    • Journal of the Ergonomics Society of Korea
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    • v.24 no.2
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    • pp.1-8
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    • 2005
  • A new design of shoulder straps and frame of backpack is proposed for reducing compression and fatigue of shoulder. The stress reduction effects of a backpack equipped with the newly designed shoulder straps and frame have been analyzed statistically through various experiments. We show that the newly designed shoulder straps(wider than the conventional ones) is superior to existing shoulder straps in respect of RPE, task performance measure and physiological measure. The new frame is also proven to be superior to existing frame in respect of RPE and task performance measure. In conclusion, the proposed shoulder straps and frame are shown to enhance the task performance of soldiers.