• Journal of the Institute of Convergence Signal Processing
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• v.13 no.1
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• pp.1-5
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• 2012

In this study, we constructed a virtual auditory display(VAD) that enables listener to move in a room freely. The VAD system was installed in a soundproof room($4.7m(W){\times}2.8m(D){\times}3.0m(H)$). The system consisted of a personal computer, a sound presentation device, and a three-dimensional ultrasound sensor system. This system acquires listener's location and position from a three-dimension ultrasonic sensor system covering the entire room. Localization was realized by convolving the sound source with head related transfer functions(HRTFs) on personal computer(PC). The calculated result is generated through a LADOMi(Localization Auditory Display with Opened ear-canal for Mixed Reality). The HRTFs used in the experiment were measured for each listener with loudspeakers constantly 1.5m away from the center of the listener' s head in an anechoic room. To evaluate the system performance, we experimented a search task of a sound source position in the condition that the listener is able to move all around the room freely. As a result, the positioning error of presented sound source was within 30cm in average for all listeners.

• Proceedings of the Korean DIstribution Association Conference
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• 2006.05a
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• pp.207-226
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• 2006

우리 사회는 정보화와 다원화로 빠르게 변화하고 있다. 경제현상도 변화하고 마케팅의 기법도 다기해지고 있다. 네트워크마케팅(NWM)이란 다단계마케팅(MLM)과 통용되는 개념으로 직접마케팅(Direct Marketing) 기법 중의 하나로 비교적 새로운 유통방법이다. 피라미드와 혼동되어 한 때 비판의 대상이었던 네트워크 마케팅이 실정법에 근거한 새로운 경제활동의 하나로 국민경제에 기능하게 되었다. 올바른 네트워크 마케팅과 실정법에 대한 이해가 필요하며 경제활동의 하나인 이 분야에도 하나님의 주권과 방법이 실현될 필요가 있다. 이 사업에 참여한 성도들은 주님의 피로 사신 교회의 목적에 충실한 행동과 성숙한 신앙인의 자세와 태도로 임할 필요가 있다. 무엇보다도 자신의 재정적 능력범위에서 사업에 참여하는 것이 바람직하다. 일확천금이나 일시에 거금을 번다는 사실과 다른 선전에 현혹되지 말고 자기 자금이나 적정수준의 자본금으로 사업에 참여하는 것이 요구된다. 현행 방문판매법은 교사나 공무원 등의 우월적 지위를 이용하여 상대방에게 다단계 판매를 강요하는 것을 금지하고 있다. 교회에서도 교회 본래의 목적인 복음 전파와 예배 등의 활동과 상치되거나 방해해서는 곤란할 것이다. 자기의 구원과 삶이 바로 서고 이웃을 돌아보아 사랑을 실천하며 복음을 전파하고, 살아서 하나님의 나라를 이 땅에 구현하고 죽어 천국에서 주님과 함께하는 성숙한 신앙생활에 근거해야 할 것이다. 교회도 네트워크마케팅에 대한 바른 이해가 필요하며, 관련 교리에 대한 정확한 이해와 적용이 요구된다고 할 수 있다. 네트워크마케팅에 대한 실정법이 제정되어 있고 현실에 맞게 수차례 개정되어 오고 있으므로 이에 대한 바른 이해가 요청된다. 또한 과학의 발전에 중세의 교회가 이해를 새롭게 한 것처럼, 경제 현상의 변화에 대해서도 통전적인 이해가 요구된다. 이 세상은 근본적으로 하나님이 창조한 세상이기 때문에 이 세상 자체를 악하다고 볼 수 없고 더구나 구원을 이 세상에서의 이탈로 볼 수 없다. 진정한 구원이란 원래 하나님이 보시기에 아름다웠던 그 세상으로의 회복을 포함한다. 이런 면에서 하나님 주권 신앙 하에서 구원이란 전 인격적인 구원, 전 우주적인 구원이 된다. 그렇기 때문에 성도는 세상의 삶과 학문, 예술, 정치, 경제, 사회를 포함한 모든 분야를 하나님의 뜻 가운데서 그 원래의 목적에 부합할 수 있도록 회복시키는 일에 적극 참여해야 한다.

• Transactions of the Korean Society of Automotive Engineers
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• v.22 no.3
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• pp.157-165
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• 2014

To develop a compact vehicle for women, the most important areas are 'behavioral characteristics, life style and driving posture'. Static AM95%ile manikin is used for package guideline. Since women's characteristics and sitting position are different from men, however, the guideline cannot satisfy women drivers. Therefore, the goal of this study is to make the database with dynamic women's driving posture and behavioral characteristics at compact vehicle. Research process will be made as follows. Firstly, through the online/offline survey and statistic analysis, lifestyle and behavioral characteristics (discomfort elements) of women are extracted. Secondly, the author performs scenario test to acquire the discomfort value of driving situation and life style. 3D models of women's manikin and driving posture were created by CATIA HUMAN. The 3D models are used for the purpose of analyzing women's driving posture. Finally, with the ANOVA result and comparison between real driving posture and package guidelines, the author is able to suggest the main issue for women drivers.

• The Journal of Korean Physical Therapy
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• v.10 no.2
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• pp.183-193
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• 1998

The Therapeutic pattern for the urinary incontinence in women should be chosen by means of the correct diagnosis. The therapeutic methods are various but drug therapy, electrical therapy and excercise therapy make the urinary incontinance be teated well, except some patient. This study carried out to investigate the therapeutic method fer urinary incontinence by the scope of excercise therapy. The excercise therapy demands the therapist of the correct diagnosis and evaluation. The patient should be Supine position not to increase the, abdominal pressure, and during the early excercise, the excercise should be applied by simple pattern to complex one. The change of position sod duration of therapy are to correspond with the sequels of patient and the patient has to abstrain from stimulant food such as coffee.

• Journal of Educational Research in Mathematics
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• v.21 no.4
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• pp.345-359
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• 2011

In this research, we designed an educational activities of exploring mathematics programs in a course of mathematics education in teacher's college. We divided future mathematics teachers into 8 groups and suggested 8 mathematics programs to them. Each group explored one mathematics program. We asked to future mathematics teachers exploring some cases that use effectively a mathematics program in the teaching of school mathematics. In the process of an exploring, we designed some activities of teaching and learning. We provided opportunities of long-term exploration, group learning, presentations, exercises, reflections to mathematics teachers. As a result, future mathematics teachers acquired basic knowledge on the usage of mathematics programs in school mathematics textbook. In addition, their capabilities that are needed to explore mathematics programs have been enhanced. Also they had learned the teacher's positive attitude through the activities of teaching and learning.

• Korean Journal of Applied Biomechanics
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• v.19 no.4
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• pp.719-728
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• 2009

In this study, a training program was conducted to improve the performance of the basic movement of the basket-to-handstand mount. After completion of the training program, the kinematic comparison of the before and after effects were investigated to provide scientific data about this technique. It is recommended that during P1, the center of body mass at the back should push the hip joint to flex quickly, and the shoulder joint should be maintained at a maximum angle. During P2, the body's center of mass must be accelerated so as to create enough momentum to rise efficiently for this, quick extension of both the hip and the shoulder is required. For safety during P3, it is advised that the speed upwards must be increased and that the hands, shoulders, and hip joint must be extended, as in the posture of a handstand. These results stress to coaches the importance of the bodies speed during the ascent in the motion.

• Journal of Engineering Education Research
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• v.16 no.2
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• pp.58-68
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• 2013

Few colleges offer remedial basic math courses for college freshmen who have not passed math placement tests or whose scholastic aptitude test score in mathematics is low. This research is aiming for the curriculum development of basic college mathematics and its effective implementation. First, an in depth statistical analysis on the basic math courses for universities in Seoul area has been done. Second, diagnostic test and longitudinal study have been carried out for one institute. Based on these, basic concepts and areas critical for the success of Calculus course are extracted. Standards and contents for the remedial math courses are suggested.

• Journal of Biosystems Engineering
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• v.37 no.6
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• pp.342-351
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• 2012

Purpose: Aerial spraying with an agricultural unmanned helicopter became a new paradigm in the agricultural practice. Laterally tilting behavior of a conventional agricultural helicopter, resulting in the biased down-wash and uneven spray deposit is a physically intrinsic phenomenon while hovering and cruise flights. Authors studied and developed a roll-balanced agricultural helicopter with a raised pylon tail rotor system. In this study, the attitude of the roll-balanced helicopter was determined using the Kalman filter algorithm, and the quality of roll balancing of a bare-airframe helicopter was evaluated. Methods: Instantaneous attitudes were estimated using the advantage of gyroscope, followed by the long term correction and prediction using accelerometer data for the advantage of convergence. The attitudes of the fuselage were calculated by applying the Kalman filter algorithm. The spraying maneuver of the helicopter was performed at a field of 50 m long, and the attitude data were acquired and evaluated. Results: The determination of attitude using the inertial measurement unit(IMU) and Kalman filter was reliable and practical. The intrinsic attitude of the developed helicopter was stable and roll-balanced. The deviation of roll angle was ${\pm}6.3^{\circ}$ with an average of $0^{\circ}$, referring to roll-balanced. Conclusions: Handling quality of the roll attitude determined to be steadily balanced. The balancing behavior of the developed helicopter would result in an even spray pattern during aerial application.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.33 no.1
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• pp.85-92
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• 2005

The motion of flexseal bearing for movable nozzle has inherent nonlinear characteristics due to floating rotational center and compression by combustion pressure of solid motor. To perform precise attitude control in spite of these characteristics, the TVC actuation system requires counter potentiometer as an extra position feedback sensor of movable nozzle to form a compensated control loop. The prototype TVC actuation system, test equipments and compensated controller are newly designed, manufactured and tested in consideration of counter potentiometer. On the basis of integration test, the inherent characteristics of movable nozzle and control characteristics of its TVC actuation system are analyzed and summarized in this paper.

• The Journal of Korean Medical History
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• v.16 no.2
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• pp.17-34
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• 2003

지금까지 서양의학의 도입이란 측면에서만 조명되어온 정약용의 의학사상은 이제 한의학 이론의 발전과정이라는 새로운 관점에서 재조명할 필요가 있다. "의령(醫零)"에서 나타나는 그의 의학사상에는 미끼 사카에가 지적한 바와 같이, 음양오행론(陰陽五行論)에 입각한 "소문(素問)"의 병리론과 음양(陰陽)으로 논해온 '근시(近視)'에 대한 기존 이론에 대해 서학(西學)의 사행설(四行說)과 갈렌생리학, 그리고 광학이론을 가지고 비판을 가한 측면이 있다. 그러나, 좀 더 자세하게 검토해 보면 이런 서학(西學)의 영향은 정약용의 의학사상을 구성하는데 있어서 부분에 불과할 뿐만 아니라 그가 구상하고 있던 새로운 철학을 위해 취사선택된 것임을 알 수 있다. "육기론(六氣論)"에서 제시되는 사정설(四情說)의 경우, 서학의 사행설(四行說)을 그대로 답습한 것이 아니라 자신의 주역(周易)철학의 소산이다. 서학(西學) 뿐만 아니라 명대(明代)의 온보학파(溫補學派) 특히 장경악(張景岳) 의학사상의 영향도 주목해야 한다. "의령(醫零)"에서 논의된 의론(醫論)의 상당부분에서 장경악(張景岳)의 "전충록(傳忠錄)"과의 연관성이 상당히 많이 발견된다. 그러나 장경악(張景岳)이론의 정치(精緻)한 면에 대해서 찬사를 보내고 있지만, 그의 숭고주의(崇古主義)와 정치(精緻)한 음양오행(陰陽五行)에 대한 논의에 대해서도 동의한 것은 아니다. 정약용은 서학(西學)과 장경악(張景岳)을 비롯한 온보학파의 의학사상을 종합한 토대위에서, 즉 원기(元氣)의 운행(運行)이란 관점으로 의학을 재구성하려는 시도를 했다고 평가된다. "육기론(六氣論)"에서 시작된 육기병리설(六氣病理說)에 대한 비판은 "외감론(外感論)"에서 "이증론(裡證論)"을 거쳐 "허실론(虛實論)"으로 이어지면서 오행상극설(五行相剋說)에 의거한 병인론, 삼음삼양론(三陰三陽論)에 의거한 경락장부론(經絡臟腑論), 내외상론(內外傷論)을 모두 반박하면서 이러한 새로운 의학을 건설하려 하였다. "허실론이(虛實論二)"에서 장경악(張景岳)의 "풍한적체(風寒積滯), 담음어혈지속(痰飮瘀血之屬), 기불행칙사불제(氣不行則邪不除), 차기지실야(此氣之實也)."라는 말을 인용한 점은 이런 점에서 시사하는 바가 크다.