• 제목/요약/키워드: proof-of-work

검색결과 173건 처리시간 0.025초

An Empirical Study on Job Embracing by Mobile Platform Workers

  • Sung Yul Ryoo;Sang Cheol Park
    • Asia pacific journal of information systems
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    • 제34권2호
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    • pp.447-469
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    • 2024
  • Despite the maturity of platforms, only some studies have explored the relationships between the working conditions of platform workers and their organization-like responses to these platforms. Thus, this research utilized the Job Demands-Resources Model (JD-R Model) to analyze the effects of job demands and resources on platform workers' job embracing. The data were collected from 182 food delivery riders in South Korea. This study utilized the PLS technique (partial least squares) to examine the research model. Regarding job demands, this study has found that work overload and physical effort significantly affect burnout. Regarding job resources, the results revealed that service technology support and training significantly affect work engagement. In alignment with the Job Demands-Resources literature, the findings offer tangible proof that burnout has a detrimental impact on job embracing, whereas work engagement has a beneficial effect on job embracing. Our findings indicate that work engagement exerts a more substantial beneficial effect on job embracing, and burnout reduces job embracing. Results also provide novel insights to scholars seeking a comprehensive research model on the impact of on-demand workplace conditions to help platforms attract and retain platform workers.

Transfer Learning for Caladium bicolor Classification: Proof of Concept to Application Development

  • Porawat Visutsak;Xiabi Liu;Keun Ho Ryu;Naphat Bussabong;Nicha Sirikong;Preeyaphorn Intamong;Warakorn Sonnui;Siriwan Boonkerd;Jirawat Thongpiem;Maythar Poonpanit;Akarasate Homwiseswongsa;Kittipot Hirunwannapong;Chaimongkol Suksomsong;Rittikait Budrit
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제18권1호
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    • pp.126-146
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    • 2024
  • Caladium bicolor is one of the most popular plants in Thailand. The original species of Caladium bicolor was found a hundred years ago. Until now, there are more than 500 species through multiplication. The classification of Caladium bicolor can be done by using its color and shape. This study aims to develop a model to classify Caladium bicolor using a transfer learning technique. This work also presents a proof of concept, GUI design, and web application deployment using the user-design-center method. We also evaluated the performance of the following pre-trained models in this work, and the results are as follow: 87.29% for AlexNet, 90.68% for GoogleNet, 93.59% for XceptionNet, 93.22% for MobileNetV2, 89.83% for RestNet18, 88.98% for RestNet50, 97.46% for RestNet101, and 94.92% for InceptionResNetV2. This work was implemented using MATLAB R2023a.

블록체인을 활용한 불변성 암호화 모듈 구현 (Implementing an Immutable Encryption Module using Blockchain)

  • 윤경섭;김민지
    • 한국컴퓨터정보학회:학술대회논문집
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    • 한국컴퓨터정보학회 2021년도 제63차 동계학술대회논문집 29권1호
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    • pp.189-192
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    • 2021
  • 이 시스템은 블록체인의 분산 처리 방식을 활용하여 중앙 집중식 데이터베이스에서 사용자가 관리자의 보안 인프라에 의존할 수밖에 없는 점을 보완하고, 네트워크 독립성과 데이터의 불변성, 투명성을 보장한다. 본 논문에서는 기존의 중앙 집중식 데이터베이스의 단점을 보완하는 블록체인의 분산 데이터 저장 방식을 활용하여 블록체인의 해시 기법과 작업 증명, 탈중앙화, 합의 알고리즘을 구현한 암호화 시스템을 제안한다.

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수입 및 국산 용지를 사용한 지도 인쇄물의 내마모성 및 내광성에 관한 비교 연구 (Comparison Study on abrasion resistance and beam endurance of map printing using the import and domestic paper)

  • 강영수;신종순;강영립
    • 한국인쇄학회지
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    • 제20권1호
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    • pp.54-64
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    • 2002
  • For the efficient work of map printing and quality improvement, we experimented on abrasion-resistance and beam-endurance of 5 kinds of map papers (offset paper, art paper, domestic map paper, foreign map paper, and Tyvek paper). The results obtained that imported and domestic map paper were superior to the others in endurance-proof.

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건식커플러를 활용한 PC부재 접합기술의 적용현장에 대한 고찰 (Reviews on the Application of Dry Coupler PC Member Joining Technology)

  • 박제영;문형재
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2023년도 봄 학술논문 발표대회
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    • pp.233-234
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    • 2023
  • This paper confirms the application sites of dry coupler technology, which is a direct connection method using screw threads, and Unlike wet couplers, this method can stand on its own without proof support and continuous work on the upper part. Furthermore, concludes with personal considerations to improve constructability.

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EXISTENCE OF POSITIVE SOLUTIONS FOR FRACTIONAL DIFFERENTIAL EQUATIONS WITH A SINGULAR WEIGHT

  • Jeongmi Jeong;Yong-Hoon Lee
    • East Asian mathematical journal
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    • 제40권1호
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    • pp.51-61
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    • 2024
  • In this work, we study the existence of a positive solution for nonlinear fractional differential equation with a singular weight. For the proof, we introduce newly defined solution operator and use well-known Krasnoselski's fixed point theorem. We also give an example with a singular weight which may not be integrable.

삼각형의 변들에 대한 등식을 탐구하는 한 방법에 대한 연구

  • 강인주;한인기
    • East Asian mathematical journal
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    • 제28권2호
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    • pp.197-213
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    • 2012
  • In this paper we study Soltan & Meidman's method that is able to be used in mathematical discovery. We analyze Soltan & Meidman's book "Tozdestva i Neravenstva v Treugolike" that is published in Moldova Republic. In this work we formulate Soltan & Meidman's method related with discovery of triangle's various equalities, and use the method to discovery mathematical equalities. As a result we suggest some new mathematical equalities related with triangle's sides and its proof.

창원국가산업공단 근로자들 작업복 착용실태에 관한 연구 -작업분야별 작업복 기능성 및 동작요인 중심으로- (A Study on the Working Clothes in the Changwon National Industrial Complex -Considering Clothing Performance and Motion Factors in Work Places-)

  • 박진아;배현숙
    • 한국의류학회지
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    • 제32권10호
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    • pp.1571-1583
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    • 2008
  • The study aimed to investigate the actual condition of working clothes in the Changwon National Industrial Complex and to analyze the industrial workers' satisfaction with and preference to the working clothes in terms of the clothing performance and work motion factors. 1 major companies in machinery, automotive, industrial engineering, shipbuilding and rolling stock industries located in the industrial complex were selected as the subject firms. Approximately 900 workers responded to the questionnaire designed for the research and the results derived from the research were as follows. (1) The subject employees were divided into 4 work groups, i.e. the $1^{st}$ work group: managerial, general affairs, sales, production planning; the $2^{nd}$ group: quality assurance, material planning and distribution, product inspection; the $3^{rd}$ group: electric, facilities, machinery, vehicles; and the $4^{th}$ group: cutting, pressing, rolling, welding and coating. (2) The significant work environmental factors considered by all work groups were air ventilation, noise and dust factors and in particular, the most dissatisfied factors evaluated by manufacture workers were insulation, noise, dust and vibration. (3) According to the employees' work motion evaluation, the work motion diversity and frequency increased in proportion to the degree of work intensity. Besides, manufacture workers more frequently wore the working clothes even during the off-duty hours comparing to the evaluation of the other work groups. (4) The most important clothing performance factors considered by manufacture work groups were perspiration absorption, stretch, air permeability, tactile sense softness, soil proof in order.

이동식 크레인 사망재해의 인지공학적 대안 (Alternative Prevention on Human Error of Fatal Injuries by the Mobile Cranes)

  • 강현수;박범
    • 대한안전경영과학회지
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    • 제17권4호
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    • pp.135-141
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    • 2015
  • According to the statistics, occupational fatal injuries by mobile cranes were about 12 per year in whole industrial. Mobile cranes are widely used in various parts of industries to improve the efficiency of the work. However considerable number of fatal injuries happen each year during the operation of the machines. In this study, the current regulations to be adequate in industrial site have to be renew in order to prevent the fatal injuries by mobile cranes. Fatal injury analyses were conducted with several accident cases by the mobile cranes. For each accident, the causes of the injuries were examined and proper safety measures were proposed. In this study, the mobile crane showed a high fatality rate in industrial accidents and no detailed cause analysis of fatal accidents was conducted in terms of unsafe acts or conditions. This study proposed a revision of the standard guideline as an accident prevention measures through in-depth analysis of fatal accidents. First, among the mainly five machines caused the accidents, mobile crane was higher for the second showed 0.6% for number of fatalities compared to number of mobil cranes and for the third showed 11% for number of fatalities compared to number of injuries. Second, main cause of cognitive engineering agenda was visibility, responsibility, affordance. As the measures to prevent accidents before starting operation, alternative revision for the fool proof including visibility, responsibility, affordance etc. for the fool proof measures was proposed. Third, alternative revision as cognitive accident prevention for the fail safe measures was proposed.