• Title/Summary/Keyword: 기술 패키지

Search Result 605, Processing Time 0.024 seconds

Improving the Sensitivity of an Ultraviolet Optical Sensor Based on a Fiber Bragg Grating by Coating With a Photoresponsive Material (광반응 재료가 코팅된 단주기 광섬유격자 기반 자외선센서의 광민감도 향상 연구)

  • Kim, Woo Young;Kim, Chan-Young;Kim, Hyun-Kyoung;Ahn, Tae-Jung
    • Korean Journal of Optics and Photonics
    • /
    • v.26 no.2
    • /
    • pp.83-87
    • /
    • 2015
  • This study was focused on developing an optical sensor that monitors ultraviolet (UV) light. Recently, we proposed and demonstrated a novel, highly sensitive UV sensor based on a fiber Bragg grating (FBG). To ensure that the incident UV light is focused on the FBG surface, the sensor was coated with an azobenzene polymer material that acts as a UV-induced stretchable functional material, in combination with a cylindrical focal lens. In this study we have improved the sensitivity of the sensor by employing a cylindrical focal mirror as a curved reflector, to refocus the UV light passing through the FBG. We considered the performance of several different types of reflectors and chose the optimal radius of curvature for the reflector. Compared to the UV sensor without an auxiliary device, the sensitivity of the FBG sensor with a focal lens and a curved reflector was 15 times as high.

A study on the improvement of educational evaluation system in dental technician using Delphi technique (델파이 기법을 이용한 치과기공사의 교육 평가 시스템 개선 방안에 관한 연구)

  • Kim, Won-Soo;Kim, Ki-Baek;Nam, Sang-Yong;Jung, Jae-Kwan;Cho, Mi-Hyang;Jeoung, Su-Ha;Kim, Jae-Hong
    • Journal of Technologic Dentistry
    • /
    • v.40 no.4
    • /
    • pp.273-281
    • /
    • 2018
  • 목적: 본 연구는 실무 현장과 교육 현장의 조사를 통한 종합적인 의견을 수렴하여 합리적인 치과기공사 양성 및 배출을 위한 개선안을 도출하고자 한다. 방법: 3회에 걸쳐 설문조사가 진행되었으며, 1차는 개방형 문항으로 조사되었고, 2차, 3차는 폐쇄형 문항으로 조사되었다. 델파이 조사를 위한 조사 인원 선정을 100명(정책집단: 20명, 교육집단: 20명, 임상가 집단: 60명)으로 지정하였다. 1차 개방형 조사결과를 토대로 2차 설문문항을 작성하였으며, 2차 설문조사 결과를 토대로 3차 설문문항을 작성 후 조사하였다. 수집된 자료의 분석은 통계패키지 프로그램 SPSS Ver. 21.0를 활용하여 델파이 기법(Delphi Method)을 활용한 연구 결과에서 전문가 집단의 의견을 수렴하기 위해 빈도분석과 기술통계분석을 실시하였다. 결과: 현 교육체계의 문제점은 임상현장과의 차이와 실무능력저하, 국가시험위주의 교육이 문제점으로 대두되었으며, 현행 평가제도의 문제점은 임상현장을 충분히 반영하지 못한 점, 실무능력이 미 반영된 실기평가로 지적되었다. 결론: 결론적으로 치과기공사의 교육과정과 평가제도는 현실적인 내용을 고려하면서 임상 실무와의 연계성을 높이는 방향으로 개선되어야 할 것으로 사료된다.

A Study on the Influence of the Perception of Personal Information Security of Youth on Security Attitude and Security Behavior (청소년의 개인정보보안 인식이 보안의도와 보안행동에 미치는 영향에 관한 연구)

  • Park, KyungA
    • Journal of Korea Society of Industrial Information Systems
    • /
    • v.24 no.4
    • /
    • pp.79-98
    • /
    • 2019
  • In this paper, the security behaviors and attitudes related with the personal information of teenagers were investigated using empirical data based on rational behavior theory and protection motivation theory. An experiment for teenagers was conducted on Excel and the statistical packages (i.e., SPSS 21.0 and SmartPLS2.0.M3) to see how self-efficiency, security attitude, security intention and individual innovation affect their security behaviors. The experimental results showed that the security behaviors and attitudes of teenagers between internet and information devices are closely related, and the social influences can affect personal self-efficacy and security attitudes. Finally, we can know that teenagers should recognize the importance of security and protect their personal information safely through continuous education and training so that they can be linked to security behaviors.

Simulation of underwater echo reduction using miniaturized Helmholtz resonators (소형화된 헬름홀츠 공진기를 이용한 수중 반향음 감소해석 모의실험)

  • Park, SungJun;Kim, Jedo
    • The Journal of the Acoustical Society of Korea
    • /
    • v.38 no.1
    • /
    • pp.67-72
    • /
    • 2019
  • In this study, we investigate the echo reduction performance of miniaturinzed Helmholtz resonators using smaller than wavelength acoustic metamaterial structures. The Helmholtz resonators are formed using air structures which exhibit large impedance mismatch with the surrounding underwater environment. Using the multi-physics software package, we find that significant reduction in the sonar signature is expected and frequency tailoring is possible by controlling the degree of space coiling and inner volume of the resonators. We find that for the basic Helmholtz resonators, up to 7 dB reduction in echo is expected at 10,000 Hz while when the miniaturized Helmoholtz resonators are used, up to 14 dB reduction in echo is expected at 5,000 Hz. In addition, frequency tailoring is demonstrated by varying the internal volume of the Helmholtz resonators and broadband characteristic is shown using superposition of various degree of space coiled structures. Through this study we investigate the effectiveness of the miniaturized Helmholtz resonators formed using air structures and the echo reduction results show promisses in the application of achieving underwater stealth.

A Study on the Cause and Improvement Plans of Construction Monitoring Sensors Decline in Durability (건설 계측센서의 내구연한 저하원인 및 개선방안 연구)

  • Woo, Jong-Tae
    • Journal of the Society of Disaster Information
    • /
    • v.15 no.1
    • /
    • pp.28-38
    • /
    • 2019
  • Purpose: The purpose of this study is to contribute to improvement of measurement management level of construction structure and technology development of monitoring sensor by presenting the detailed causes and improvement plans of construction monitoring sensor's decline in durability. Method: The causes and improvement plans of the durability degradation of the construction monitoring sensor were divided into the construction field and the electric, electronic field. The detailed status was reviewed. Results: In the field of construction, approval and inspection, inspection and testing, verification and calibration, and minimization of loss and damage ratio were reviewed. In the field of electric and electronics, sensor package and sealing, disconnection of stress concentration area, damage caused by lightning and corrosion were reviewed. Conclusion: It is expected that the durability of monitoring sensors applied to the construction site will become longer than the present status based on the study that analyzed causes and improvement plans of construction monitoring sensor's decline in durability in the field of construction and electric, electronic devices.

The Impact of IS Policy and Sanction Perceptions on Compliance Intention through Justice: The Role of Justice Sensitivity (정보보안 정책 및 제재 인식이 공정성을 통해 준수 의도에 미치는 영향: 공정 민감성의 역할)

  • In-Ho Hwang
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.18 no.2
    • /
    • pp.337-348
    • /
    • 2023
  • As protecting organizations' information assets affects their substantiality, they are increasing their investments in policies, regulations, and technologies for systematic information asset management and protection. This study confirms the impact on information security(IS) compliance from the perspective of employees who apply IS policies to actual work. In particular, this study identifies mechanisms linked to IS policy awareness, sanction, justice, and IS compliance from the perspective of expanding deterrence theory. We applied 316 samples obtained from workers of organizations that applied IS policies and regulations to work and verified the relationship between mechanisms by using AMOS and SPSS packages. As a result of the verification, IS policy awareness had a positive effect on organization justice and compliance intention through the severity and clarity of sanctions. Individual justice sensitivity had a moderating effect on the cause and outcome of justice. The sanction-related mechanism presented in this study provides strategic implications for organizations that require active IS activities by insiders.

A Study on the Customer Reward Program Factors in Ski Resort (스키리조트의 고객 보상프로그램 요인에 관한 연구)

  • Byeon, Kyung-Won;Kim, Young-Ki
    • 한국체육학회지인문사회과학편
    • /
    • v.54 no.2
    • /
    • pp.285-297
    • /
    • 2015
  • This study aimed to research customer reward program factors of ski resorts in Korea through surveying the expert panel side and the customer side. This study conducted survey for 28 practicians that have been working for the department of customer reception of 6 different ski resorts all over the country and 7 faculties quited well-known in the academic circles. Delphi technique has been used to conduct survey customer reward program factors of the supplier side till the 3rd survey as the final. Based on this survey, an interview and a questionnaire survey have been used to conduct survey customer reward program factors that have been aware by the 50 customers, who have visited the ski resorts in 2014, and compared those two surveys above. In order to process the data, descriptive statistic analysis and Kendall W test have been utilized PASWWIN Ver. 18.0. The results were as follows: discount factor 8 articles, promotion factor 10 articles, package factor 5 articles, and convenience factor 6 articles have been produced as a good result.

Designing a Reinforcement Learning-Based 3D Object Reconstruction Data Acquisition Simulation (강화학습 기반 3D 객체복원 데이터 획득 시뮬레이션 설계)

  • Young-Hoon Jin
    • Journal of Internet of Things and Convergence
    • /
    • v.9 no.6
    • /
    • pp.11-16
    • /
    • 2023
  • The technology of 3D reconstruction, primarily relying on point cloud data, is essential for digitizing objects or spaces. This paper aims to utilize reinforcement learning to achieve the acquisition of point clouds in a given environment. To accomplish this, a simulation environment is constructed using Unity, and reinforcement learning is implemented using the Unity package known as ML-Agents. The process of point cloud acquisition involves initially setting a goal and calculating a traversable path around the goal. The traversal path is segmented at regular intervals, with rewards assigned at each step. To prevent the agent from deviating from the path, rewards are increased. Additionally, rewards are granted each time the agent fixates on the goal during traversal, facilitating the learning of optimal points for point cloud acquisition at each traversal step. Experimental results demonstrate that despite the variability in traversal paths, the approach enables the acquisition of relatively accurate point clouds.

A Study on the Digital Literacy and Life Satisfaction of Middle-Aged and Older People (중·장년층의 디지털리터러시와 삶의 만족도에 관한 연구)

  • Hyun A Lee;Woo Kwon Chang
    • Journal of the Korean Society for information Management
    • /
    • v.41 no.2
    • /
    • pp.317-351
    • /
    • 2024
  • This study aims to determine the impact of digital literacy skills of middle-aged and older people using public libraries on their life satisfaction. For this study, a survey was conducted on 192 middle-aged and older people aged 40 to 64 living in area G. The collected data were analyzed using the statistical package SPSS 27 program. The analysis methods in this study included frequency analysis, descriptive statistical analysis, t-test, one-way ANOVA, Duncan's multiple range test for post-hoc analysis, and regression analysis. The results of this study are as follows: First, digital literacy competency has a significant positive impact on the life satisfaction of middle-aged and older adults; as their digital literacy skills improve, their life satisfaction increases. Second, digital literacy competency varies based on gender, education level, employment status, and average monthly income, influencing their engagement in activities such as study or work. Additionally, higher levels of digital literacy competency, as determined by the highest level of education, positively affect life satisfaction, leisure activities, and cultural life.

Usability Evaluation of XR Content for Production Training Through Word Cloud Analysis (워드클라우드 분석을 통한 제작공정 교육용 확장 현실 콘텐츠 사용성 평가)

  • Eeksu Leem
    • Journal of Advanced Navigation Technology
    • /
    • v.28 no.4
    • /
    • pp.574-581
    • /
    • 2024
  • This study explores the usability of extended reality (XR) content tailored for production process training, with a focus on user experience. Participants engaged with extended reality training modules, and qualitative data was subsequently collected through interviews. These interviews evaluated the hardware, user interface, and overall user satisfaction. The analysis utilized python packages for keyword extraction and word cloud visualization, offering insights into user perceptions. The findings revealed that although the hardware was deemed comfortable, concerns were raised regarding its weight and heat emission. The interactive interface, which relies on hand tracking, encountered issues with recognition rates, leading to suggestions for alternative input methods. Users acknowledged extended reality's potential impact on industries like healthcare and education, sharing both positive and negative views on the technology. This research enhances our understanding of user responses and guides the future enhancement of extended reality content for industrial applications, aiming to improve its quality and practical usability