• 통상정보연구
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• 제14권4호
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• pp.131-152
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• 2012

본 연구는 2국간 의료기기무역흐름(international trade flow)에 관한 무역결합도이론(Intensity Approach)을 통해 우리나라의 의료기기수출구조(export structure)와 중국과 일본의 수입구조(import structure)를 상호유기적으로 연계시킴으로써 한 중 일 의료기기 무역의 흐름을 보다 이론적이고 체계적으로 분석하였다. 또한, 우리의 대중국과 일본의 의료기기 수출증대(boost exports)에 기여할 수 있는 방안을 모색하는데 의의가 있다. 이에 본고에서는 한국과 의료기기(medical device) 시장에서 주요한 경쟁관계에 있는 중국과 일본의료기기 시장의 중요성을 인식하고 특별히 의료기기의 한 중 일 무역현황(situation of trade)을 살펴본다. 이어서 삼국의 의료기기에 있어서 상대적인 시장흐름(market stream)과 주요 의료기기 품목의 무역결합도(trade intensity)를 알아보고, 한 중 일 의료기기 시장의 지속적인 성장방안을 찾고자 한다.

• PNF and Movement
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• 제20권2호
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• pp.203-214
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• 2022

Purpose: We investigated the effects of multimodal vs. stabilization exercises on chronic low back pain. Methods: Study participants were randomly assigned to a multimodal exercise (n = 20) or a stabilization exercise group (n = 20). Participants in the multimodal exercise group performed stabilization, stretching, and endurance exercises, whereas those in the stabilization exercise group performed only stabilization exercises. Participants in both groups performed the exercises for 1 hour thrice a week for 5 weeks. The following outcomes were evaluated: pain intensity (numeric rating scale), disability (the Oswestry Disability Index [ODI] and the Roland-Morris Disability Questionnaire [RMDQ]), pain-induced fear (the Fear of Daily Activities Questionnaire [FDAQ], the Fear-Avoidance Belief Questionnaire [FABQ], and the Tampa scale for kinesiophobia-11 [TSK-11]). Outcome measures were evaluated at baseline and after intervention. Results: Significant post-intervention improvement was observed in pain intensity and the RMDQ and FDAQ scores in both groups (p < 0.01). The post-intervention ODI, FABQ, and TSK-11 scores were improved in the multimodal exercise group (p < 0.01). Additionally, significant differences were observed in pain intensity, as well as in the ODI, FDAQ, and FABQ scores in the multimodal exercise group compared with these findings in the stabilization exercise group (p < 0.01). Conclusion: The multimodal and stabilization exercise programs reduced pain intensity, disability, and pain-induced fear. Compared with stabilization exercises, multimodal exercises more effectively reduced pain intensity, disability, and pain-induced fear. This study highlights that musculoskeletal rehabilitation for people with chronic low back pain should include a multimodal exercise program.

• 한국산학기술학회논문지
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• 제12권2호
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• pp.805-812
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• 2011

이 연구의 목적은 고강도로 실시되는 12주간의 웨이트 트레이닝을 통하여 노인 여성들의 신체조성 및 기능적 체력에 어떠한 변화가 있는지를 규명하는 것이다. 연구대상자들은 U경로당에 정기적으로 출입하는 70세 이상 노인 여성 중에 실험의 취지를 알고 자발적 참여의사를 가진 24명을 선정하였다. 선정된 24명을 무선할당 방법을 통해 두 개의 운동집단인 고강도 저항성 운동 집단 (High intensity resistance group, n=8), 저강도 저항성 운동 집단(Low intensity resistance group, n=8) 그리고 비교군 (Control group, n=8)으로 나누었다. 운동집단은 12주간의 고강도 및 저강도 저항성 운동을 실시하였으며, 비교군은 12주간 어떠한 운동에도 참가하지 못하도록 제한하였다. 연구결과, 12주간 실시된 고강도 웨이트 트레이닝은 근력과 민첩성을 유의하게 향상시켰으며, 체지방률과 체지방량은 유의하게 감소시켰다(p<0.05). 평형성 및 심폐능력은 향상되었으나 통계적 유의성은 없었다. 종합해보면 정기적인 고강도 웨이트 트레이닝은 노인 여성들의 체력 개선에 도움을 줄 수 있는 운동이라 사료된다.

• 제어로봇시스템학회논문지
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• 제9권2호
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• pp.140-144
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• 2003

A navigation sensor system for outdoor AGV(Automatic Guided Vehicle) using AMR(Anisotropic Magnetoresitive) sensors is described. We derive a formula of the position of AMR sensor using the measured magnetic field intensity due to permanent magnet with constant distance. The system consists of sensor board. sensor control board and position processing board. The sensor board measures magnetic field intensity, the sensor control board controls the measurement of six sensors sequentially, and the position processing board computes the accurate position of the permanent magnet using Least Square Method. We arranged six sensors at intervals of 30cm and measured the position of the permanent magnet moving at intervals of 30cm. Experimental results showed that we can get standard deviation of 2mm and error of &\pm&4.5mm at a height of 20cm from the permanent magnet.

• 한국정밀공학회지
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• 제22권8호
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• pp.50-56
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• 2005

This paper is described a development of an optical fiber displacement sensor. The optical fiber sensor using an intensity modulated measures the displacement between target and sensor. A prototype sensor is composed of a transmitting part, a receiving part and a signal processing circuit. The experiment was conducted not only the sensor performance but also factors that affect intensity. The main performance of this sensor is resolution of 0.37um and the non-linearity $0.7\%$ FS and the dynamic bandwidth of about 6.3kHz. As a result of rotation test, the prototype sensor showed an equivalent performance to a commercial eddy current sensor.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.1617-1622
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• 2008

We report a new molecular detection process which measures the changes in the plasmon resonance peaks of periodic Au nanoparticle arrays fabricated using the electron beam lithography. As the Au nanoparticle arrays are modified by the chemical reaction in solutions having various concentrations of a target molecule, both the position and intensity of the plasmon peak change in proportion to the concentration of the target molecule. We expect that the process developed in this work can be employed for fine tuning of the plasmon peak wavelength and also for the optical detection of various kinds of molecules. Moreover, this method may improve the measurement accuracy compared with existing approaches that use only one change (peak wavelength or peak intensity) as a readout value for the molecular detection.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2003년도 학술.기술논문발표회
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• pp.73.1-76
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• 2003

Recently, as the alternatives to preserve environment such as effective usage of wastes or unusable resources are drawing attentions, researches and measures for the two tasks, which are reuse of waste wood and development of eco-friendly materials, are being examined and established in various fields. However, they are still insufficient. Therefore, in this study, for the efficient application of waste woods and eco-friendly effects, mortar was produced using sawdust as the waste wood and mineral material cement for combination, in order to produce inorganic boards using waste woods. which were made when sawing. This study attempted to suggest a basic material about the physical properties of mortar, which used waste woods, after examining the features of wood mixture rate, water-cement rate, consolation according to the mixture rate of the setting accelerator, specific gravity, compression intensity, and bending intensity as experiment factors.

• Earthquakes and Structures
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• 제11권1호
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• pp.109-127
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• 2016

This paper examines the contribution of three sources of uncertainties to probabilistic seismic behaviour of wood frame buildings, including ground motions, intensity and seismic mass. This sensitivity analysis is performed using three methods, including the traditional method based on the conditional distributions of ground motions at given intensity measures, a method using the summation of conditional distributions at given ground motion records, and the Monte Carlo simulation. FEMA P-695 ground motions and its scaling methods are used in the analysis. Two archetype buildings are used in the sensitivity analysis, including a two-storey building and a four-storey building. The results of these analyses indicate that using data-fitting techniques to obtain probability distributions may cause some errors. Linear interpolation combined with data-fitting technique may be employed to improve the accuracy of the calculated exceeding probability. The procedures can be used to quantify the risk of wood frame buildings in seismic events and to calibrate seismic design provisions towards design code improvement.

• 한국지진공학회논문집
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• 제20권7_spc호
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• pp.517-526
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• 2016

In this paper, some popular intensity measures of earthquakes including magnitude, MMI, and PGA as well as their empirical relationships are briefly reviewed since they have been widely used without prudence by mass media, the public, and even the government when asking or expressing the seismic capacity of buildings. The basic concept of current seismic design is also presented in order to facilitate relevant discussions. It is emphasized that expressing the building seismic capacity simplistically in terms of seismological quantities or terminologies like magnitude and MMI is inherently irrational, may be misleading the stakeholders, and should be avoided. Alternative expressions, more rational and consistent with current seismic design philosophy and practice, are recommended.

• 전기전자학회논문지
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• 제22권4호
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• pp.907-915
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• 2018

본 논문에서는 저가형 적외선 거리 센서의 성능을 개선하는 방법을 제안한다. 적외선 거리 센서는 반사광의 강도를 측정하여 거리로 환산한다. 제안하는 방법은 센서의 감지 거리를 개선하고 다양한 조명환경에서도 강인하게 동작하도록 한다. 이는 센서의 특성곡선을 추출하고 이를 바탕으로 HDR(High Dynamic Range) 기법을 적용함으로써 가능해졌다. 적외선 입력의 세기와 노출 시간을 다양하게 변화시켜서 센서의 출력값을 획득하였고 이로부터 센서의 특성곡선을 추출하였다.