무인기 충돌회피 알고리즘을 이용한 임무컴퓨터용 상용기성품 운영체계 성능 비교에 대한 연구

양준모,전유지,이상철,Yang, Jun-Mo,Jeon, Yu-Ji,Lee, Sang-Chul 한국항공운항학회 2016 한국항공운항학회지 Vol.24 No.4

There has been an increase in the number of researches on the segment for commercialization after developing avionics systems. In this paper, we have applied a commercial off-the-shelf(COTS) operating systems in an aircraft mission computer. We used UAV collision avoidance algorithms to compare the performance of COTS operating systems. The UAV collision avoidance algorithms were tested on different operating systems to compare the performances of the operating systems. The measured parameters are memory usage and processing time. We have verified that the UAV collision avoidance algorithms worked successfully and compared the performance of each operating system.

기업규모와 연구개발투자에 관한 연구 ( 경제학문헌연보 주제분류 : O3 , O4 , E0 )

양준모,유승훈,이대식,지성권 ( Joon Mo Yang,Seung Hoon Yoo,Dae Sik Lee,Sung Kwon Chi ) 한국경제학회 1998 經濟學硏究 Vol.46 No.2

본 연구는 국가혁신체제의 효율화를 위한 선행과제로서 기업규모와 연구개발투자의 상호연관관계를 이론적으로 규명하고자 한다. 金秉汶(1992), 김종일 (1995), 李丙基(1992), 張眞圭 · 金基國(1993), 張眞圭 ·安斗鉉(1992) 등의 실증적 분석을 통하여 대체로 입증된 경험적 사실들을 이론적 모형을 통하여 설명하고자 한다. 이러한 경험적 사실에 대하여 Cohen · Klepper(1996)는 연구개발투자의 비용분담이론을 바탕으로 접근하고 있으나 본 연구에서는 기업의 내생적 선택이론을 바탕으로 접근하고 있다. 본 연구에서는 기업의 규모와 연구개발투자는 대체로 비례하며, 연구개발투자가 커짐에 따라서 그 생산성이 작아지는가의 여부는 기술여건 등 여러 조건 에 의하여 결정된다는 것을 밝혔다. 또한 동태모형을 통하여 경기변동과 연구개발투자, 연구개발 의 생산성, 그리고 총요소생산성 등의 관계를 규명하였다.

무선 메쉬 네트워크에서 최소 간섭과 최적의 주파수 대역폭을 이용한 CDS 구성

양준모,김보남,김흥준,Yang, Jun-Mo,Kim, Bo-Nam,Kim, Heung-Jun 한국정보통신학회 2009 한국정보통신학회논문지 Vol.13 No.1

무선 애드록 네트워크의 특수한 형태인 무선 메쉬 네트워크는 최근 새로운 연구과제의 초석으로 주목받고 있다. WMN의 제한적인 동작 환경으로 인하여 효과적인 연결 Dominating set 구성은 브로드캐스팅, 라우팅, 혹은 가상 백본을 구성을 위한 방법 중 하나로 중요한 관심 대상이다. 본 논문에서 분산적인 방법을 토대로 네트워크에서 최소지연과 효율적인 대역폭 사용을 통하여 성능 향상을 시키기 위하여 Interference와 Bandwidth을 Dominating set 구성 파라미터로 사용한 연결 Dominating set 구성 알고리즘을 제안한다. 시뮬레이션을 통하여 제안된 알고리즘은 최대의 주파수 대역폭을 가진 링크와 연결된 최소의 연결 Dominating set이 구성됨으로써 네트워크 전체 성능이 향상됨을 보여준다. As a special type of Wireless Ad Hoc Networks, Wireless Mesh Networks (WMNs) have become the comer stone of research issues. Due to the limited operational environment of WMNs, an efficient connected dominating set (CDS) construction scheme is an important concern since it has been found extremely useful in broadcasting, routing and virtual backbone construction. In this paper, we propose a distributed Bandwidth-Interference aware CDS construction scheme to improve the network performance via two parameters such as node's number of neighbor and link bandwidth. Our CDS construction scheme selects the node that has more neighbors and enough bandwidth to support more end-devices in order to enhance overall network throughput and reliability. We confirm through simulations and show that our scheme constructs the CDS with the small subset of DS and the link that has better bandwidth.

자동차와 타이어의 함수관계

양준모,Yang, Jun-Mo 대한타이어공업협회 1991 타이어 고무 Vol.153 No.-

난류경계층에서 벽마찰력과 유동방향 속도성분과의 상관관계(II)

양준모,유정열,최해천,Yang, Jun-Mo,Yu, Jeong-Yeol,Choe, Hae-Cheon 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.3

Conditional sampling techniques are utilized to investigate the relation between the wall skin-friction and stream wise velocity fluctuations in a turbulent boundary layer. Conditionally averaged results using a peak detection and the VITA (variable-interval time-averaging) technique show that a high skin friction is associated with high frequency components of the wall skin-friction fluctuations. The conditionally averaged wall skin-friction fluctuations obtained by using the VITA technique have a positively-skewed characteristics compared with the conditionally averaged stream wise velocity fluctuations. It is confirmed that there exists a phase shift between the wall skin-friction and stream wise velocity fluctuations, which was also found from the long-time averaged space-time correlations. The amount of phase shift between the wall skin-friction and stream wise velocity fluctuations is the same as that from the long-time averaged space-time correlations and does not change despite the variation of the detection threshold.

군용 소형 회전익무인기 감항인증기준에 대한 연구

양준모,이상철,Yang, Junmo,Lee, Sangchul 한국항공운항학회 2021 한국항공운항학회지 Vol.29 No.2

In modern society, the use of small rotary-wing unmanned aerial vehicles such as drones is increasing. As the military considers tactics using drones, demand for drones is increasing. However, there is still no airworthiness certification standard for drones for safety. In this paper, we proposed airworthiness certification standards for small rotorcraft unmanned aerial vehicles based on CS-LURS in Europe and STANG-4703, 4738 (draft) of the North Atlantic Treaty Organization. In addition, airworthiness certification standards have been strengthened through the case of unmanned aerial vehicle accidents in operation by the Korean military. The airworthiness certification standards for small rotary-wing unmanned aerial vehicles will be supplemented through a demonstration project.

Si (001) 기판에서 $N_2$처리에 의해 형성된 에피택셜 C49-$TiSi_2$상의 열적 거동과 결정학적 특성에 관한 연구

양준모,이완규,박태수,이태권,김중정,김원,김호정,박주철,이순영,Yang, Jun-Mo,Lee, Wan-Gyu,Park, Tae-Soo,Lee, Tae-Kwon,Kim, Joong-Jung,Kim, Weon,Kim, Ho-Joung,Park, Ju-Chul,Lee, Soun-Young 한국재료학회 2001 한국재료학회지 Vol.11 No.2

$N_2$처리에 의해 Si (001) 기판에 형성된 C49상의 구조를 갖는 에피택셜 $TiSi_2$상의 열적 거동과 결정학적 특성을 X선 회절법 (XRD)과 고분해능 투과전자현미경법 (HRTEM)으로 조사하였다. 에피택결 $C49-TiSi_2$상은 $1000^{\circ}C$ 정도의 고온에서도 안정상인 C54상으로 상변태하지 않고 형태적으로도 고온 특성이 우수하다는 것이 밝혀졌다. HRTEM 결과로부터 에피택결 $TiSi_2$상과 Si 사이의 결정학적 방위관계는 (060) [001]TiSi$_2$//(002) [110]Si임을 알 수 있었고 계면에서의 격자 변형에너지는 misfit 전위의 형성에 의하여 해소되는 것을 확인할 수 있었다. 또한 HRTEM상의 해석과 원자 모델링을 통하여 Si에서 에피택셜 C49-TiSi$_2$상의 형성기구와 C49상의 (020) 면에 존재하는 적층결함을 고찰하였다. The thermal behavior and the crystallographic characteristics of an epitaxial $C49-TiSi_2$ island formed in a Si (001) substrate by $N_2$, treatment were investigated by X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). It was found from the analyzed results that the epitaxial $C49-TiSi_2$ was thermally stable even at high temperature of $1000^{\circ}C$ therefore did not transform into the C54-stable phase and did not deform morphologically. HRTEM results clearly showed that the epitaxial $TiSi_2$ phase and Si have the orientation relationship of (060)[001]$TiSi_2$//(002)[110]Si, and the lattice strain energy at the interface was mostly relaxed by the formation of misfit dislocations. Furthermore, the mechanism on the formation of the epitaxial $_C49-TiSi2$ in Si and stacking faults lying on the (020) plane of the C49 Phase were discussed through the analysis of the HRTEM image and the atomic modeling.

난류경계층에서 벽마찰력과 유동방향 속도성분과의 상관관계(I)-시간 평균된 공간-시간 상관관계의 분석-

양준모,유정열,최해천,Yang, Jun-Mo,Yu, Jeong-Yeol,Choe, Hae-Cheon 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.1

A simultaneous measurement of the wall skin friction and near-wall streamwise velocity fluctuations is performed using hot film and hot wire anemometers to investigate the relation between them. Near-wall turbulence statistics measured with a hot-wire probe are in good agreement with previous results. Turbulence properties of the wall skin friction fluctuations measured with a hot film also show fairly good agreements with those measured by others except that rms level is lower in the present study. Long-time averaged space- time correlations show that the wall skin friction is highly correlated with a turbulence structure which is tilted from the wall in the streamwise direction. Tilting angles are obtained from the phase shifts between the wall skin-friction and streamwise velocity fluctuations. The convection velocity of the near-wall streamwise velocity obtained from the space-time correlation is in good agreement with that from the direct numerical simulation database.

인공송신원 가청주파수 자기지전류 탐사를 이용한 제주 동남부의 전기비저항 구조 및 지하수 분포 조사

양준모,권병두,이희순,송성호,박계순,이규상,Yang, Jun-Mo,Kwon, Byung-Doo,Lee, Hei-Soon,Song, Sung-Ho,Park, Gyeo-Soon,Lee, Kyu-Sang 대한자원환경지질학회 2007 자원환경지질 Vol.40 No.1

제주도 동남부의 전기비저항 구조 및 지하수 분포 형태를 조사하기 위해 제주도 중산간에서 남동방향으로 해안 지역을 횡단하는 두 측선에 대해 인공송신원 자기지전류탐사를 수행하였다. 측점들이 위치한 지질학적 상황을 고려하여 세 종류의 일차원 역산 기법을 도입하였고, 해석의 신뢰성 향상을 위해 각 역산 결과를 비교, 분석하였다. 이 과정으로부터 도출된 제주 동남부의 개략적인 전기비저항 구조는 고비저항-저비저항-보다 저비저항을 갖는 3층 구조였다. 역산 결과와 측점 부근의 심부 시추 자료의 비교를 통해 제주도 동남부의 각 층별 암상이 개략적으로 추정되었다: 지질학적 층서의 관점에서 제 1층과 2층은 두께 100-250m의 현무암층에, 제 3층은 서귀포층 및 U층에 대응하는데, 서귀포층의 두께는 조사심도가 충분히 깊지 않고 서귀포층과 U층의 전기비저항 차이가 작기 때문에 추정할 수 없었다. 그러나 주대수층과 밀접하게 관련 있는 서귀포층은 제주도 동남부 지역의 경우 중산간 지역부터 해안 지역까지 뚜렷한 공간적 연속성을 보여주었다. We have performed the CSAMT survey to examine the geoelectrical structure and groundwater distribution for two survey lines across the south-eastern region of Jeju Island. Three kinds of 1-D inversion techniques were employed taking account of the geological situation around the observation sites, and their inversion results were concurrently compared and analyzed to improve the reliability of interpretation. The resultant inverted resistivity structures reveals the three-layered structure, which is composed of the layers with a high-low-lower resistivity from the surface downward. Through the comparison of the inverted resistivity model and core log of deep borehole nearby observation sites, the lithology of each inverted layer was inferred. The first layer and second layer corresponded to the basaltic layer with a thickness of $100{\sim}250m$, and the third layer to the Seoguipo Formation and the U Formation; the thickness of the Seoguipo Formation could not be estimated due to the limitation of investigation depth and little resistivity difference between both Formations. Nevertheless, the Seoguipo Formation, which is strongly associated with the groundwater system in the south-eastern region of Jeju Island, showed the conspicuous spatial continuity from the middle mountain area to coastal area.

서울시 임대아파트에 거주하는 일부 저소득 중장년의 만성질병별 건강행태 비교연구

양준모,박해모,이선동,Yang, Junmo,Park, Haemo,Lee, Sundong 대한예방한의학회 2014 대한예방한의학회지 Vol.18 No.2

Objective : To compare the differences in health behaviors by chronic diseases of middle-aged living in Seoul's low-income housing Method : Of the 1469 residents aged 35 to 60 living in low-income housing in Seoul's District A, 318 were equal probability of selection method selected. t-test, ANOVA, $x^2$, OR(95% CI, P-value) were selected to analyze the data, and the confidence interval was 5%. Results : There were no significant differences in all health behaviors by vascular and metabolic, But there was a statistically significant difference for gastrointestinal diseases caused by sleep hours(p=0.001), liver diseases caused by smoking, drinking and sleep hours(p=0.004, p=0.001, and p=0.033, respectively), musculoskeletal diseases caused by sleep hours and health exam(p=0.0000 and p=0.002, respectively). Also, statistically significant differences were found for tumors caused by sleep hours(p=0.004), depression by the sleep hours and health exam(p=0.001 and p=0.013, respectively), allergies by in sleep hours(p=0.004), thyroid diseases by smoking and health exam(p=0.013 and p=0.007, respectively). After adjusting for the confounding factors for diseases, OR was obtained for each health behavior. There were no statistically significant differences in all health behaviors for vascular, metabolic, and tumors. However, the OR for gastrointestinal diseases 4.10(1.63-10.36, 0.0028) and 2.96(1.05-8.41, 0.0041) at 5-7 and 7-9 sleep hours. The OR for liver diseases was 3.13(1.03-9.48, 0.0437) at 7-9 sleep hours, the OR values for musculoskeletal diseases were 2.91(1.23-6.88, 0.00149), and 4.46(1.68-11.86, 0.0027) at 5-7 and 7-9 sleep hours. OR for depression were 4.82(1.70-13.66, 0.0031) and 4.13(1.19-14.31, 0.0026) at 5-7 and 7-9 sleep hours. OR for allergy were 2.78(1.22-6.32, 0.0015) and 3.93(1.49-10.39, 0.0058) at 5-7 and 7-9 sleep hours. There were statistical significances for liver diseases for 1-2 times of health exam at 0.35(0.14-0.90, 0.00301), for liver diseases for 1-2 times of health exam at 0.35(0.14-0.90, 0.00301), for musculoskeletal diseases for 3-4 times of health exam at 0.26(0.09-0.79, 0.0175), for depression for 3-4 times of health exam at 0.17(0.04-0.66, 0.0106), for allergies for 1-2 times of health exam at 0.30(0.13-0.70, 0.0055), and for thyroid diseases for 1-2 times and annually of health exam at 0.07(0.01-0.60, 0.00154), 0.09(0.01-0.96, 0.0461). We known significant difference the health behaviors by the diseases. especially in sleep hours and health exam times Conclusion : Only sleep hours and health exam caused statistically significant differences in chronic diseases. but the sleep hours was postitively correlated with the risk of disease, while health exam were inversely related.