• Title/Summary/Keyword: Performance verification

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A Study on the Job Satisfaction of Nurses Experiencing Clinical and Clinical Trials (임상과 임상시험을 경험한 간호사의 직무만족에 관한 연구)

  • Kang, Cheon-Kook
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.1
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    • pp.604-611
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    • 2020
  • This study was undertaken is to improve the working conditions by improving the job satisfaction of clinical research nurses and clinical nurses involved in and conducting clinical trials. The survey was conducted from November 6 to December 6, 2017 for 100 nurses working in Seoul and Gyeonggi-do. The accumulated data were analyzed by frequency analysis, reliability verification, and t-test using the SPSS program. Our results reveal that job satisfaction was higher for clinical nurses (2.94 ± 0.609 points) as compared to clinical research nurses (2.89 ± 0.620 points). Also, the satisfaction level of salary received was higher amongst the clinical nurses than the clinical research nurses. Furthermore, although career decision was relatively lower for the clinical nurse than the clinical research nurse, the importance of job performance and job stability ranked high. Considering importance of the role of clinical research nurses in clinical trials, it is necessary to enhance their job satisfaction by improving the clinical trial environment such as appropriate treatment and professional role, and the working environment including remuneration, professional status, and administrative work to establish their jobs.

Study of the Acceptance of Interested Parties(Auditor /Auditee) in the Information System Audit Technologies Based Technology Acceptance Model(TAM) (정보시스템 감리기술에 대해 이해관계자(감리인/피감리인)의 수용에 관한 연구 -기술수용모델(TAM)을 중심으로-)

  • Kim, Hak-Joon;Jeon, Soon-Cheon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.2
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    • pp.1403-1413
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    • 2015
  • An information System Audit by the recognition of a problem and suggestions for solutions for overall matters about constructing and managing information systems is needed in order to contribute to the improvement of an information system's quality and improving the performance of projects. In reality, however, the general cognition is that audit is biased by subjective opinions. For this, an auditor needs to measure the level of recognition of the usability and convenience of the technologies of automating audit by applying TAM in the information system audit, and to analyze the relationship with recognition and availability of the interested parties for the technology (tool) of the audit. By the hypothesis verification result, an auditor needs to present objective corroborative facts that back up the level of recognition and usability for the information technology in the field of audit. This study verified that the phenomenon of technology application can be explained and predicted by applying TAM in the field of audit. Through an empirical study of the recognition level of audit and contractor, the developer suggests that the audit plan stage is similar to the audit corrective action stage, but the audit action stage is different from the audit review stage. This research can verify the audit technology preferred for the availability and intention of use and usability.

Numerical Analysis of Grout Flow and Injection Pressure Affected by Joint Roughness and Aperture (절리 거칠기와 간극 변화에 따른 그라우트 유동과 주입압에 관한 수치해석적 연구)

  • Jeon, Ki-Hwan;Ryu, Dong-Woo;Kim, Hyung-Mok;Park, Eui-Seob;Song, Jae-Jun
    • Tunnel and Underground Space
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    • v.20 no.2
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    • pp.82-91
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    • 2010
  • Grouting technology is one of the ground improvement methods used in water controlling and reinforcement of rock mass in underground structure construction. It is necessarily required to find out the characteristics of grout flow through discontinuities in a rock mass for an adequate grout design and performance assessment. Laminar flow is not always applicable in simulating a grout flow in a rock mass, since the rock joints usually have apertures at a micro-scale and the flow through these joints is affected by the joint roughness and the velocity profile of the flow changes partially near the roughness. Thus, the influence of joint roughness and aperture on the grout flow in rough rock joint was numerically investigated in this study. The commercial computational fluid dynamics code, FLUENT, was applied for this purpose. The computed results by embedded Herschel-Bulkley model and VOF (volume of fluid) model, which are applicable to simulate grout flow in a narrow rock joint that is filled with air and water, were well compared with that of analytical results and previously published laboratory test for the verification. The injection pressure required to keep constant injection rate of grout was calculated in a variety of Joint Roughness Coefficient (JRC) and aperture conditions, and the effect of joint roughness and aperture on grout flow were quantified.

Performance Verification of WAVE Communication Technology for Railway Application (차량용 무선통신기술(WAVE)의 철도 적용을 위한 성능검증)

  • Kim, Keum-Bee;Ryu, Sang-Hwan;Choi, Kyu-Hyoung
    • Journal of the Korean Society for Railway
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    • v.19 no.4
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    • pp.456-467
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    • 2016
  • Wireless Access in Vehicular Environments (WAVE) communication technology, which provides vehicleto-vehicle and vehicle-to-infrastructure communication and offers safe and convenient service, has been developed for application to an Intelligent Transport System (ITS). This paper provides field test results on a study of the feasibility of WAVE technology application to railway communication systems. A test railway communication system based on WAVE technology has been built along the Daebul line and a newly developed EMU. Field tests have been carried out according to the communication function requirements for LTE - R. The test results show that the railway communication system based on WAVE technology meets the functional requirements: maximum transmission length is 730m, maximum transfer delay is 5.69ms, and maximum interruption time is 1.36s; other tests including throughput test, video data transmission test, VoIP data test, and channel switching test also produced results that meets the functional requirements. These results suggest that WAVE technology can be applied to the railway communication system, enabling Vehicle-to-Wayside communication.

Functional Verification of Pin-puller-type Holding and Release Mechanism Based on Nylon Wire Cutting Release Method for CubeSat Applications (나일론선 절단 방식에 기반한 Pin-puller형 큐브위성용 태양전지판 구속분리장치의 기능검증)

  • Go, Ji-Seong;Son, Min-Young;Oh, Hyun-Ung
    • Journal of Aerospace System Engineering
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    • v.15 no.5
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    • pp.81-88
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    • 2021
  • In general, a non-explosive nylon wire cutting-based holding and release mechanism has been used to store and deploy deployable solar panels of CubeSat. However, with this method, accessing the solar panel's access port for charging the cube satellite's battery and electrical inspection and testing of the PCB and payloads while the solar panel is in storage is difficult. Additionally, the mechanism must have a reliable release function in an in-orbit environment, and reusability for stow and deploy of the solar panel, which is a hassle for the operator and difficult to maintain a consistent nylon wire fastening process. In this study, we proposed a pin-puller-based solar panel holding and release mechanism that can easily deploy a solar panel without cutting nylon wires by separating constraining pins. The proposed mechanism's release function and performance were verified through a solar panel deployment test and a maximum separation load measurement test. Through this, we also verified the design feasibility and effectiveness of the pin-puller-based separation device.

A Problematic Bubble Detection Algorithm for Conformal Coated PCB Using Convolutional Neural Networks (합성곱 신경망을 이용한 컨포멀 코팅 PCB에 발생한 문제성 기포 검출 알고리즘)

  • Lee, Dong Hee;Cho, SungRyung;Jung, Kyeong-Hoon;Kang, Dong Wook
    • Journal of Broadcast Engineering
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    • v.26 no.4
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    • pp.409-418
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    • 2021
  • Conformal coating is a technology that protects PCB(Printed Circuit Board) and minimizes PCB failures. Since the defects in the coating are linked to failure of the PCB, the coating surface is examined for air bubbles to satisfy the successful conditions of the conformal coating. In this paper, we propose an algorithm for detecting problematic bubbles in high-risk groups by applying image signal processing. The algorithm consists of finding candidates for problematic bubbles and verifying candidates. Bubbles do not appear in visible light images, but can be visually distinguished from UV(Ultra Violet) light sources. In particular the center of the problematic bubble is dark in brightness and the border is high in brightness. In the paper, these brightness characteristics are called valley and mountain features, and the areas where both characteristics appear at the same time are candidates for problematic bubbles. However, it is necessary to verify candidates because there may be candidates who are not bubbles. In the candidate verification phase, we used convolutional neural network models, and ResNet performed best compared to other models. The algorithms presented in this paper showed the performance of precision 0.805, recall 0.763, and f1-score 0.767, and these results show sufficient potential for bubble test automation.

Structural Relationship Analysis between Positive and Negative Parenting Attitudes, Grit, and Academic Helplessness Felt by First Graders of Middle School Students (중학교 1학년 학생이 느끼는 부모의 긍정적·부정적 양육태도, 삶의 만족도, 학업무기력 사이의 구조적 관계 분석)

  • Yoo, Kae-Hwan
    • The Journal of the Korea Contents Association
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    • v.21 no.12
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    • pp.140-154
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    • 2021
  • This study examines the structural relationship between parents' positive and negative parenting attitudes, life satisfaction, and academic helplessness. To this end, 2,595 middle school students (1,405 boys and 1,185 girls) were used among the KCYPS 2018 panel materials. The model was validated using a structural equation model, and the verification of the mediated effects of life satisfaction was significant with bootstraps. The results of the study are as follows. First, the positive and negative parenting attitudes of parents have a significant impact on life satisfaction. These results can be interpreted as having an impact on the lives of adolescent children, depending on their parenting attitudes. Second, the positive and negative parenting attitudes of parents have a significant impact on academic helplessness. These results can be interpreted as having an effect on the academic performance of adolescent children depending on their parenting attitudes. Third, satisfaction in life has a significant adverse effect on academic helplessness. These results can be interpreted as having a positive impact on studies according to the satisfaction level of youth's life, and having a negative impact on studies if life satisfaction is high and life satisfaction is low. Fourth, the satisfaction of life is mediated between parents' positive and negative parenting attitudes and academic helplessness. Through this study, it is meaningful in that it allows parents to understand the process of life satisfaction affecting their academic helplessness according to their parenting attitudes.

Patterns and Characteristics of Corrugated Stainless Steel Tubing for a Yellow Insulation Ring Type by Artificially Deteriorated (인위적으로 열화된 황색절연링형 금속플렉시블호스의 패턴 및 특성)

  • Lee, Jang-Woo;Choi, Chung-Seog
    • Fire Science and Engineering
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    • v.32 no.6
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    • pp.1-6
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    • 2018
  • This study is to analyze the characteristics of the yellow insulation ring type of the CSST used for tubing when it is artificially deteriorated and damaged by burning. The CSST for tubing consists of a tube, protective coating, nut, yellow insulation ring, packing, and socket. In addition, it is thought that a yellow insulation ring and rubber packing were used to connect the tube and socket in order to improve the airtightness and insulation performance. The result of the verification of the data acquired from the tests in the 95% confidence interval shows that the Anderson-Darling (AD) and P value were analyzed to be 0.945 and 0.015, respectively. This confirms that the test data of the CSST for tubing is reliable. The analysis of the arithmetic mean of the insulation resistance of a CSST showed that the CSST damaged by burning by a torch, and the one damaged by electrical burning, was $16.7k{\Omega}$ (the greatest relatively) and $208{\Omega}$ (the lowest), respectively, while it was $1.72k{\Omega}$ in the case of a normal product. Therefore, the analysis result of the insulation resistance of the CSST collected from the scene of a fire can be utilized to examine the cause of damage by burning. In addition, it was found that when the maximum current of 97 A was applied to the CSST for about 5 s using a Primary Current Injection Test System (PCITS) the protective film and insulation ring of the CSST has no difference from that of a normal product. However, a part of the metal tube was melted.

Verification of Planetary Boundary Layer Height for Local Data Assimilation and Prediction System (LDAPS) Using the Winter Season Intensive Observation Data during ICE-POP 2018 (ICE-POP 2018기간 동계집중관측자료를 활용한 국지수치모델(LDAPS)의 행성경계층고도 검증)

  • In, So-Ra;Nam, Hyoung-Gu;Lee, Jin-Hwa;Park, Chang-Geun;Shim, Jae-Kwan;Kim, Baek-Jo
    • Atmosphere
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    • v.28 no.4
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    • pp.369-382
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    • 2018
  • Planetary boundary layer height (PBLH), produced by the Local Data Assimilation and Prediction System (LDAPS), was verified using RawinSonde (RS) data obtained from observation at Daegwallyeong (DGW) and Sokcho (SCW) during the International Collaborative Experiments for Pyeongchang 2018 Olympic and Paralympic winter games (ICE-POP 2018). The PBLH was calculated using RS data by applying the bulk Richardson number and the parcel method. This calculated PBLH was then compared to the values produced by LDAPS. The PBLH simulations for DGW and SCW were generally underestimation. However, the PBLH was an overestimation from surface to 200 m and 450 m at DGW and SCW, respectively; this result of model's failure to correctly simulate the Surface Boundary Layer (SBL) and the Mixing Layer (ML) as the PBLH. When the accuracy of the PBLH simulation is low, large errors are seen in the mid- and low-level humidity. The highest frequencies of Planetary boundary layer (PBL) types, calculated by the LDAPS at DGW and SCW, were presented as types Ι and II, respectively. Analysis of meteorological factors according to the PBL types indicate that the PBLH of the existing stratocumulus were overestimated when the mid- and low-level humidity errors were large. If the instabilities of the surface and vertical mixing into clouds are considered important factors affecting the estimation of PBLH into model, then mid- and low-level humidity should also be considered important factors influencing PBLH simulation performance.

Study on Innovation Measurement of National R&D Investments for Nanotechnology Using Data Envelopment Analysis (자료포락분석을 통한 국가 나노기술 연구개발투자 결과의 혁신성 분석 연구)

  • Lim, Jung Sun;Hahn, Hyuk;Won, Dong-Kyu;Kim, Sanggook
    • Journal of Korea Technology Innovation Society
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    • v.22 no.2
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    • pp.207-219
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    • 2019
  • The international trends in activities of government R&D performance measurement is evolving into evidence-based approach to support the verification of objective policy implementation. The European Commission has been implementing KETs (Key Enabling Technologies) policy that incubates nanotech based emerging technologies to support the fourth industrial revolution/revitalization of high-tech manufacturing, and resulting innovations are quantified by KETs Observatory project. The European Commission also built Innovation Radar system that monitors potentially innovative projects within FP7 and Horizon2020 by data analysis. The United States is also upgrading its Federal RePORTER system to quantitatively monitor federal R&D investments with outcomes (including nanotechnology). In the field of Korean nanotechnology, basic statistical data by analyzing NTIS (National Science & Technology Information Service) information is applied in policy field. Developing innovation measurement methodology beyond basic statistical analysis is an international policy issue, and a long-term R&D investment area of a government. The objective of this model study is to quantify the innovation potential of nano R&D investments conducted by Korea government, using input-output based efficiency measurement model and NTIS (National Science & Technology Information Service) that is comprehensive data portal for national R&D investments/outcomes including nanotechnology.