• Journal of Acupuncture Research
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• v.23 no.1
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• pp.15-23
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• 2006

목적 : 경사계와 각도기로 경추, 요추 및 견관절의 운동 범위를 반복 측정하여 두 도구의 측정자내 신뢰도 우위를 추정하여 보고자 하였다. 방법 : 각 관절에 별다른 증상이 없는 104명의 학생들을 대상으로 경추, 요추 및 견관절의 능동 운동 범위를 경사계와 각도기로 각 도구 당 2회씩 측정하였다. 측정하기 바로 전에, 한 명의 교육자가 경사계와 각도기를 이용한 경추, 요추 및 견관절의 운동 범위 측정 방법을 교육하였다. 104명은 두 명 씩 쌍을 이룬 후 각도기, 경사계, 각도기, 경사계를 이용하는 순서로 서로의 경추, 요추 및 견관절의 운동 범위를 측정하였다. 결과 : 견관절의 수평 외전과 외회전에서 경사계의 측정값이 각도기의 측정값보다 통계적으로 의미 있게 안정적으로 반복되었다(P<0.05, 독립 이 표본 t-검정). 결론 : 견관절의 운동 범위 측정에 있어서 경사계가 각도기보다 높은 측정자내 신뢰도를 가지는 것으로 추정되어, 경사계와 각도기의 신뢰도를 급간내 상관 계수(intraclass correlation coefficient)를 이용하여 비교해보는 연구의 예비 조사로서 실시된 이번 연구의 결과는 향후 시행될 연구에 있어서 견관절의 운동 범위 측정에 보다 집중적인 연구를 진행할 수 있는 근거를 마련하였다.

• Journal of the Korean School Mathematics Society
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• v.11 no.3
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• pp.513-541
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• 2008

The purposes of the study were to investigate whether the use of the Geometer's Sketchpad(GSP) is more effective than the use of traditional tools such as ruler and protractor to enhance eighth- grade students' understanding of quadrilaterals and geometric reasoning ability and to examine how the use of the software affects on the development of students' understanding and reasoning ability. According to the results of the posttest, there was a significant difference in student achievement between students using GSP and students using ruler and protractor. Students using GSP significantly outperformed students using ruler and protractor on the posttest. Student interview data showed that the use of the GSP was more effective in developing students' geometric reasoning ability. Students using GSP achieved higher degrees of acquisition for van Hiele level 2 and 3 than students using ruler and protractor. Dynamic visual representations and hands-on experiences provided in GSP learning environment helped students approach quadrilateral concepts more conceptually and realize their pre-existing conceptual errors and re-conceptualize their mathematical ideas.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.29 no.2
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• pp.146-149
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• 2018

A monopulse sensor is used to estimate the angle of a target with respect to each received single pulse. It is well known that the cross-eye technique can result in an angle deception effect against monopulse sensors. To verify this effect, we propose a test environment configuration for the angle deception using monopulse receiving antennae and cross-eye transmitters in an anechoic chamber. Using the proposed test environment configuration, we have measured powers of the sum and difference of the signals received by the monopulse receiving antennae when the distance of the two cross-eye transmitters is varied. Finally, the angle deception performance related to the powers of the sum and difference signals was analyzed.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.4
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• pp.111-116
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• 2018

In this thesis, the range of motion of the joint was measured using a flexible sensor without using a goniometer, and the measured values were transferred to a smart device. Current range of joint motion measurement is measured by a person using a goniometer. Since the method of measuring by a person is different according to the measuring method and position of the measuring person, it is difficult to make consistent measurement, and an error may occur. The sensor for measurement is a flexible sensor that measures the resistance value that changes according to the movement of the joint. The sensed value can be transmitted to the smart device wirelessly through the ROM sensor node. Also, the sensed analog values were converted to digital values using an ADC. The converted value can be transmitted to the smart device wirelessly through the sensor node. The developed ROM measuring device can perform more consistent measurement than the measurement using general articulator and real time monitoring by interlocking with smart device, so that rapid diagnosis according to the movement of the joint can help the patient's rapid treatment and rehabilitation medical advancement will be.

• Journal of Biosystems Engineering
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• v.25 no.3
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• pp.233-240
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• 2000

A commercially available Doppler radar was modified and evaluated for on-board monitoring of ground speed. The radar output was corrected for pitch angle of aircraft based on the output of an electrolytic tilt sensor. The effects of aircraft speed, height and mounting angle on error in the ground speed were evaluated. The speed error decreased with an increase of the mounting angle since the radar contact angle with respect to the ground approached to the mounting angle. The error increased with an increase of the nominal aircraft speed. The altitude insignificantly affected the speed error. The Doppler radar provided acceptable percent errors within 5% in most measurements. The error can be reduced within ${\pm}$1.5% by increasing the mounting angle ($43^{\circ}$). The error of -3.8% at the mounting angle of $29^{\circ}$could be reduced by adjusting the mounting angle with respect to the radar contact angle.

• Journal of the Korea Institute of Military Science and Technology
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• v.21 no.5
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• pp.583-590
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• 2018

Cross eye technique was proposed as an angle deception jamming technique against monopulse radars. Tracking radars use monopulse or conical scan methods for angle estimation of a target. Thus, if we verify deception performance of cross eye technique against a conical scan radar, efficient jamming systems can be developed to disturb both monopulse radars and conical scan radars. In this paper, we propose a mathematical model for a conical scan radar and a cross eye system. Using the proposed model, angular deception performance of the cross eye technique against conical scan radar is analyzed.

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.851-854
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• 2010

본 연구는 견관절 통증이 있는 노인을 대상으로 테이핑 요법과 수동적 관절가동범위운동이 견관절의 통증, 관절 가동력, 손의 민첩성에 미치는 효과를 확인하기 위하여 실시하였다. 연구대상자는 B시의 D복지관을 이용하는 65세의 이상의 노인들 중 견관절 통증을 호소하는 노인 40명이었고 연구기간은 4주간 총12회로 테이핑 요법과 수동적 관절가동범위운동을 적용하였다. 연구를 시작하기 전과 후에 견관절의 통증, 견관절의 가동범위, 손의 민첩성을 측정하였다. 통증정도는 시각적 상사척도를 사용하여 측정하였고, 견관절의 가동범위는 인체각도기를 사용하여 측정하였다. 유의수준은 p<.05로 설정하였다. 그 결과, 테이핑과 수동적 관절가동범위 운동을 적용 후에 노인의 견관절 통증은 감소하였고 견관절의 가동력과 손의 민첩성이 증가하였다. 노인의 견관절 통증의 감소정도와 손의 민첩성 정도는 테이핑군과 관절 범위운동군 간에 차이가 나타나지 않았다. 노인의 견관절 가동범위의 변화정도는 관절범위운동군보다 테이핑군에서 견관절 신전과 외전에서 관절의 범위가 증가하는 정도가 더 큰 것으로 나타났다. 따라서 테이핑요법과 수동적 관절범위운동은 노인의 견관절 통증을 감소시키고, 관절가동범위, 손의 민첩성과 같은 신체적인 기능의 개선을 가져온다고 할 수 있겠다. 또한 테이핑의 적용이 견관절 운동범위 증가에는 더 효과적이라고 할 수 있다.

• Physical Therapy Korea
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• v.7 no.4
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• pp.8-15
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• 2000

이 연구의 목적은 노인들 중, 넘어지는 사람들(fallers)과 안 넘어지는 사람들(nonfallers)의 경부, 체간, 하지의 관절가동범위를 측정하여 비교하는 것이다. 본 연구대상은 남자 6명, 여자 22명, 나이 65세에서 88세의 노인으로 독립적으로 활동할 수 있는 사람들을 두 개의 집단으로 한 사람씩 면접을 통해 분류하였다. 대상자 선정 이전 일년 동안 한번 이상 넘어진 경험이 있는 사람들을 넘어진 사람들로 규정, 그리고 넘어진 경험이 없는 사람들을 안 넘어진 사람들로 정의하였다. 관절가동범위는 각도기로 측정하였고 미국 정형외과 학회(American Academy of Orthopaedic Surgeons)의 표준화된 가동 범위 측정방법을 사용하였다. 넘어진 사람들과 안 넘어진 사람들의 연구 결과의 차이를 알아보기 위하여 양측 독립성 t-검정을 사용했다. 연구결과, 넘어진 사람들과 안 넘어진 사람들간의 관절가동범위 중 흉요부의 굴곡, 신전, 우측굴곡, 좌측굴곡, 그리고 우측회전과 좌측회전, 고관절부의 신전, 내전, 외측회전과 내측회전, 그리고 족관절의 배굴에서 유의한 차이가 있었다. 이와 같은 결과는 체간, 고관절부 그리고 발목의 유연성이 노인들의 균형을 유지하는데 영향을 준다고 말할 수 있다.

• Journal of the Korean earth science society
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• v.35 no.3
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• pp.180-191
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• 2014

In this study, a geological field trip learning program using 3 Dpanorama virtual reality (PVR) techniques is developed to learn about the Chaeseokgang area located in a national park near Byeonsan-bando, Jeonbuk, Korea. The developed $360^{\circ}{\times}180^{\circ}$ PVR program can show every face of observational points and interact as zoom-in, zoom-out and image rotation. For the educational effects of the materials, it is provided with a compass, a protractor for measuring the dip of strata and observation of specimen of observational points. It also assists students to learn by providing enlarged images, pop-up windows, and expert explanation main observational points. The program is applied to the class of 35 gifted students in middle school to investigate the effectiveness of the program. The results showed that positive responses of the students were 85% or more. It is suggests that this program be used as indirect situated learning material and a solution to geological field trip problems like cost, safety, distance, and so on geological learning of middle school science.

• Journal of the Korea Concrete Institute
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• v.17 no.3 s.87
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• pp.361-368
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• 2005

This study proposes an algorithm for detection and analysis of cracks in digital image of concrete surface to automate the measurement process of crack characteristics such as width, length, and orientation based on image processing technique. The special features of algorithm are as follows: (1) application of morphology technique for shading correction, (2) improvement of detection performance based on enhanced binarization and shape analysis, (3) suggestion of calculation algorithms for width, length, and orientation. A MATLAB code was developed for the proposed algorithm, and then test was performed on crack images taken with digital camera to examine validity of the algorithm. Within the limited test in the present study, the proposed algorithm was revealed as accurately detecting and analyzing the cracks when compared to results obtained by a human and classical method.