항만 내 선박과 부두의 사고를 예방하기 위하여 통항 및 접안 안전성 평가를 통하여 안전한 부두가 건설되어 관리하고 있으나, 선 박의 접안 및 계류 과정에서 선박이 부두에 충돌하거나 로프로 인한 인명사고의 발생 등 예측할 수 없는 사고들이 종종 발생한다. 자동계류장 치는 선박의 신속하고 안전한 계류를 위한 자동화된 시스템으로 로봇 매니퓰레이터와 흡착 패드로 구성된 탈/부착 메커니즘을 가지고 있다. 본 논문은 자동계류장치의 흡착 패드의 위치 및 속도제어에 필요한 선체와의 변위 및 속도 측정 시스템을 다룬다. 자동계류장치에 적합한 측 정 시스템을 설계하기 위하여, 본 논문은 우선 센서의 성능 및 실외 환경적 특성 분석을 수행한다. 다음으로 이러한 분석 결과를 토대로 실외 부두환경에서 설치되는 자동계류장치에 적합한 변위 및 속도 측정시스템의 구성 및 설계 방법에 대해 기술한다. 또한 센서의 측정상태 감지 및 속도 추정을 위한 알고리즘을 제시한다. 제안된 방법은 다양한 속도 구간에서의 변위 및 속도 측정 실험을 통해 그 유용성을 검증한다.

본 연구는 EMG(electromyography) 텍스타일 전극 개발을 목적으로 레이어 수의 디자인 및 원단을 다르게 하여 성능 및 신호 획득 안정성을 평가한다. 레이징 및 프레스 공정을 통하여 텍스타일 전극을 제조하며 Layer-0, Layer-1, Layer-2로 레이어 유무 및 수에 따른 결과를 분석했다. 이에 레이어 유무에 따라서는 근활성 측정에 영향을, 수가 많을수록 높은 성능이 나타남을 확인할 수 있었다. Layer-2 구조로 통일하여 5가지의 원단(네오프렌, 스판덱스 쿠션, 폴리에스테르 100%, 나일론 스판덱스, 광목 캔버스)으로 전극을 제조해 실험해 보았다. 성능적인 면에서, 원단의 중 량이 높은 나일론 스판덱스가 높은 성능을 보였으며, 스판쿠션 텍스타일 전극이 근활성도 수득에 높은 안정성을 보 였다. 이에 위 연구는 레이어에 따른 성능 연관성과 전극-피부사이의 닿는 면적 간의 관계 등을 고찰하여 슬리브 전체의 의복압을 늘리는 대신 특정 센서 측정 부위에만 높은 압력을 가함으로 차후 연구에서 레이어의 수 및 물성에 따른 전극의 공학적 설계 가능성을 제시한 의의가 있다.

Screws are the closest and most familiar mechanical elements of everyday life, and are generally used so widely that there is no machine without screws. Screws are used to make it easier to combine objects with objects, and are also used to transfer large forces from machines. The most influential factor in the coupling of these screws is the effective diameter. If the effective diameter is not accurate, the support cannot be finished or endured, leading to a major accident. The importance of these screws cannot be ignored, so in this study, the effective diameter was measured using the three-wire method, the screw micrometer method, and the projector method, and the one-way factor design method was applied to determine the exact method compared to the KS standard.

Due to the Fukushima nuclear accident, a large amount of radioactive material was released into the atmosphere, and consequently, it spread over a wide area and was deposited into the soil. As a result of this, a wide area of radioactive contamination site was created. Due to the contaminated site, the need for research on various exploration platforms for efficient situation management and field response is being emphasized. Backpack-type radiation survey & monitoring equipment is useful for creating a contamination maps containing information such as Dose Rate, Radionuclide, Activity Concentration accompanied by spatial analysis when performing a Scan Survey that moves with a backpack on a wide area site. contamination maps are based on accurate radiological characteristic information. However, there is a problem in that the accuracy of the evaluation results is lowered due to changes in environment conditions or the variability of the dose rate and counting rate during scan survey. This problem should be solved by applying the influence of each variable to the underlying data. However, prior to this, it is most important to prepare the base underlying first. And this can be obtained through evaluation of detection performance through static survey. Therefore, in this study, the change in detection efficiency for the measurement height and radius of the backpack-type radiation survey & monitoring equipment based on the 3"×3" NaI(Ti) detector was evaluated. First, the height of the source and Backpack-type radiation survey & monitoring equipment was evaluated from 0 cm to 1 m, which is the height of the soil and detector when an adult male wears a backpack. The experiment was conducted using the 137Cs (383 kBq) point source, which is a nuclide mainly detected at the contaminated site. The measurement time was measured five times per one minute, considering that it was backpack-type equipment and a future scan survey. In addition, in order to evaluate the detection radius, the measurement was performed by changing the measurement distance up to 5 m at intervals of 50 cm. As a result of evaluating the detection performance of the backpack-type radiation surveys & monitoring equipment, it was confirmed that increasing the detection height and radius reduces the count rate in the form of an exponential function. In addition, it was confirmed that the detected radius varies depending on the height. Based on these results, we plan to conduct additional research to understand the scan survey and its sensitivity to various factors. Through this, the company plans to develop various models for exploring the site by improving the accuracy of backpack-type radiation surveys & monitoring equipment.

구조물의 상태를 조기에 파악하기 위한 구조물 건전도 모니터링 연구와 건물의 정보를 수집하여 에너지를 효율적으로 관리해 주는 건물에너지관리시스템에 관한 연구가 활발히 진행 중이다. 본 연구에서는 기존 모니터링 시스템 연구가 건설, 센싱, ICT 기술이 융합된 첨단 기술임에도 불구하고 고가의 센서와 전문적인 기술력이 요구되어 적용 범위가 제한된다는 한계를 극복하기 위하여 싱글보드컴퓨터 중 가장 널리 쓰이는 라즈베리파이와 저전력으로 장거리의 통신이 가능한 로라 모듈, 고성능의 보급형 가속도계를 활용하여 장기간으로 건물의 모니터링이 가능한 무선 엣지 컴퓨팅 시스템을 구축하였다. 또한 라즈베리파이에 분산처리 알고리즘을 탑재함으로써 실시간으로 취득되는 방대한 양의 가속도 데이터 중 의미있는 데이터만을 취득하였으며 와이파이 통신으로 취득한 전체의 로우데이터와 비교함으로써 본 시스템으로부터 취득된 데이터의 정밀성을 검증하였다.

In order to measure the flow rate of liquid sodium, the flow measurement method should be determined by considering the opacity of sodium, the chemical reaction with air and water, and so on. By using the segmental wedge flowmeter which is one of the representative devices for flow measurement, the methodology for measuring the liquid sodium flow was examined and the flow characteristics were observed. The variations of the discharge coefficients according to various flow conditions were also evaluated. In addition, the structural integrity at high temperature condition was evaluated by using the liquid sodium as a working fluid and these study results were reflected in the design of the segmental wedge flowmeter.

The strategic stakes of differentiation are so great for companies that the adequacy between aesthetic perception of the products and functional benefits for consumers must be taken into account (Alba and Williams, 2013; Bloch, 1995; Reimann et al., 2010). In order to examine the consumer's aesthetic perception, we tested an exploratory measurement scale of aesthetic style (Lagier, 2006), which we first validated for different kinds of products. Exploratory and confirmatory analysis of this scale were conducted and obtained results which proved the stability of the scale for design products. The three dimensions of the factor analysis can be interpreted within the conceptual framework of the perception of design products. We effectively find two clearly distinct dimensions which measure: “affective intensity” and “tolerance for ambiguity”. The last dimension is composed of items which fall both in the domain of “cognitive differentiation” and “cognitive discrimination”. To segment our sample and quantify the different profiles of aesthetic style, eight groups of consumers were formed from the scores on the three dimensions. Finally, the structure of aesthetic style on consumer preference for four design objects was also tested. We seek to show that our scale can also explain the choice for some objects. A one-way ANOVA was conducted to determine whether there were significant differences in preference for each object based on intensity scores of affective intensity, cognitive discrimination/differentiation and tolerance for ambiguity. Our measurement scale of aesthetic style, in the context of this test, explained consumer preference for some design objects.

The dynamic capabilities of sensing market signals, creating new opportunities and reconfiguring resources and capabilities to new opportunities in a rapidly changing economic environment determines the competitiveness of the enterprise to create added value and survival. This study conceptualized a two-stage performance measurement framework based on the casual model of resource (input)-process-performance (output). We have developed a ‘Process capability index’ that reflect the dynamic capabilities factors as a key intermediary product linking resource inputs and performance outputs in enterprise performance measurement. The process capability index consists of four elements : manpower (level of human resource), operation productivity, structure and risk management. The DEA (Data Envelopment Analysis) model was applied to the developed performance indicators to analyze the branch office performance of a telecom company. Process capability efficiency (stage 1) uses resource inputs to reach a certain level of process capabilities. In performance result efficiency (stage 2), the process capabilities are used to generate sales revenues and subscribers. The two-stage DEA model derives intermediate output values that optimize the individual stages simultaneously. Some branch offices in the telecom company have focused on process capability efficiency or some other branch offices focused on performance result efficiency. Positioning map using two-stage efficiency decomposition and benchmarking can help identify the sources of inefficiencies and visualize strategic directions for performance optimization. Applications of two-stage DEA in conjunction with the case study that are meaningfully used in performance measurement areas have been scarce. In particular, this paper has the contribution to present a new performance measurement model considering the organization theory, the dynamic capabilities.

매년 증가하고 있는 풍해에 대한 대책으로서의 내풍설계는 필수적이다. 사과나무 지주시스템의 내풍설계를 위해서는 우선적으로 사과나무에 작용하는 풍하중을 파악해야 하고, 이를 위해서는 사과나무의 항력계수 산정이 필요하다. 기존 항력계수 산정 방법에서 발생할 수 있는 실험적 오차 등의 문제점을 보완하고자, 하중 측정 장치의 제작을 통한 풍하중 직접 측정 및 이를 통한 항력계수의 역추정 과정을 수행하였다. 풍속이 증가할수록 항력계수는 감소하며 점차 수렴하는 경향을 나타냈으며, 풍속 30m/s 일 때, 전면적 기준 약 0.176, 순면적 기준 약 0.356 의 값을 갖는 것으로 나타났다.

The present study has measured the velocity distribution in a three-dimensional shape model of the rectangular settling tank using PIV system. The experiment system consists of hi-speed camera, laser and host computer. Reynolds number based on the guide wall height(H=25mm) has been applied during the whole experiments. The results showed that recirculation flow in settling tank exists and a internal flow weakly influenced by Reynolds number at Re=5×103 greater.

1990년대 이후 웰빙 라이프스타일의 도입 및 인구 고령화 사회의 진입으로 인해 언제 어디서나 지속적으로 측정가능한 생체 신호 센싱 모니터링 시스템에 대한 관심이 높아지고 있다. 이에 따라, 최근 지속적으로 호흡 측정이 가능한 시스템에 대한 연구 및 개발이 활발히 이루어지고 있으나 소비자 수요에 기반한 스마트 의류적용을 위한 호흡 측정 시스템의 연구는 미비하다. 따라서, 본 연구에서는 압전의 원리를 이용하여 호흡시 인체의 체표면이 변화하면서 센서에 가해지는 압력을 전기적 신호로 바꾸어 호흡을 측정하는, 전도성 섬유기반의 전기용량성 섬유 압력 센서(Textile Capacitive Pressure Sensor, TCPS)를 개발하였으며, 이를 실증적 연구를 통해 센서의 유용성을 입증하고자 하였다. 그 결과, Nasal로부터 측정된 호흡율과 TCPS를 통해 측정된 호흡율간의 상관계수는 r＝0.9553 (p< 0.0001)로 TCPS의 신호 측정 정확성을 확인할 수 있었으며, 또한, 사용성 및 착용성 평가의 결과 인지적 변화, 착용성, 운동성, 관리의 용이성 및 유용성에서 모두 만족한다 정도의 평가 결과를 가져와 본 연구에서 개발된 TCPS의 착용성 및 의류 적합성을 입증하였다. 마지막으로 TCPS의 의류 적합 위치 평가 결과는 복부 부위에서 신호의 안정감을 갖으며, 착용감도 높은 것으로 나타났다. 최종적으로, 위의 결과들을 종합하여 호흡 측정 기능의 스마트 의류 개발을 위한 기초 디자인을 제시하였다.

The study focuses on the Repeated Measurements Design (RMD) which observations are periodically made for identical subjects within definite time periods. One of the purposes of this design is to monitor and keep track of replicated records within regular period over years. This paper also presents the classification models of RMD that is developed according to the number of factors in Between-Subject (BS) variates and Within-Subject (WS) variates. The types of models belong to each number of factors: One factor is 0BS 1WS. Two factors are 1BS 1WS and 0BS 2WS. Three factors are 1BS 2WS and 2BS 1WS. Lastly, the four factors include model of 2BS 2WS In addition, the study explains the generation mechanism of models for RMD using Generalizability Design (GD). GD is a useful method for practitioners to identify linear model of experimental design, since it generates a Venn diagram. Lastly, the research develops three types of 1BS 2WS RMDs with crossed factors and nested factors. Those are random models, mixed models and fixed models and they are presented by using Generalizability Design, (S:A×B)×C. Moreover, the example of applications and its implementation steps of models developed in the study are presented for better comprehension.

The study presents two measurement split-plot models with a restricted randomization to save cost and time Split-plot models are used to handle HTCM (Hard To Control Measurement) factors such as high temperature and long-time catalyst control The models d

The paper presents the measurement split split-plot models for saving the time and cost. The split split-plot designs developed are efficiently used to estimating the gauge R&R(Reproducibility & Repeatability) when the completely randomized design of all factors(such as high pressure and temperature) is expensive and time consuming. The models studied include three split split-plots considering the type of experimental units.

The research develops measurement processes for estimating and evaluating the gauge R&R(Reproducibility & Repeatability) using ANOVA(Analysis of Variance) of experimental design tools. The ten-step processes developed include experimental goal setting, the selection of characteristics(factors, levels), data model, ANOVA, EMS(Expected Mean Square), estimation of gauge precisions, and evaluation indexes. The three-factor combined measurement models are presented to show the processes developed in this paper.