3차원 근거리 표적의 효과적인 위치 추정 알고리듬

이철목,이수형,박상배 위덕대학교 산업기술연구소 2000 산업기술연구소 논문집 Vol.4 No.1

본 논문에서는 다중 3차원 근거리표적의 위치를 효과적으로 추정하는 기법을 제안하였다. 제안한 기법은 세 개의 부분센서배열을 이용하여 기존의 3D MUSIC에서의 3차원 탐색을 3번의 1차원 탐색으로 대치함으로써 연 산량을 감소시켰다. 각각의 부분센서배열에서 얻은 센서신호로부터 표적이 원거리에 있다고 가정하고 원거리 입체각을 추정하면 추정된 입체각은 실제 근거리 표적의 위치인 방위각, 고각, 거리의 함수로 주어진다. 그러므로 세 개의 부분센서배열로부터 얻은 세 개의 함수를 연립하여 풀면 실제 근거리표적의 위치를 추정할 수 있다. 또 한 다중 표적의 경우, 추정치에 대하여 3차원 MUSIC 스펙트럼값을 비교함으로써 연관 문제를 해결하였다. In this paper, we are proposing an efficient 3D source localization algorithm using 3 uniform linear subarrays. The proposed algorithm replaces 3D search required in conventional 3D MUSIC algorithm with 3 1D searches, and thus reduces computational burden. The estimate of the 1D conic angle obtained from a subarray under the far-field assumption satisfies a nonlinear algebraic equation of the true source bearing angle, elevation angle, and range. The proposed algorithm estimates source location by solving 3 algebraic equations obtained from 3 subarrays. Comparing 3D MUSIC spectrums of the estimated source locations, the proposed algorithm solves pairing problem for multiple sources localization.

NTSC/PAL/SECAM 표준을 만족하는 Variable-clock Video Encoder의 내부 필터 설계

이성목,김주현,강봉순 東亞大學校附設 情報技術硏究所 2005 情報技術硏究所論文誌 Vol.13 No.1

In this paper, we present the design of the filters for variable-clock video encoder in CCTV system The SONY corporation preoccupies 80% of the CCD market in CCTV application. But, SONY corporation's CCD module used in CCTV requires particular clock frequency. Generally, a video encoder is operated 27MHz sampling frequency. That is clock frequency of video encoder different with CCD's clock frequency. If we used a filter of general video encoder, filter's characteristics are changed and don't be satisfied with standard. So, we design the filters that satisfied with TV broadcasting standards without regard to clock frequency. The proposed filters are simulated by using the MATLAB. This paper also proposes the variable-clock encoder that can be activated at the clock equal to the CCD clock without the scaler and the PLL.

마르크스에 있어서 자유의 개념

이상목 동아대학교 인문과학대학 인문과학연구소 1994 인문과학연구 Vol.- No.-

The nature of Marx's views on morality has long been a matter of considerable dispute. Marx did not write a tretise or any essays on morality. However, I shall argue that Marx has a moral theory and examine that the concept of freedom is at the center of Marx's moral views. Marx's condemnation of capitalism lies on morality of freedom. The nature of Marx's views on morality is linked with the concept of freedom. Freedom is quite close to Marx's view on morality. Marx's central objection to capitalism is that people are not free under capitalism. For Man freedom has two senses. First, freedom is self-realization. It is the process of creating human nature itself. Second, freedom is self-determination. For Man an individual is free, only if he is self-determining. To be free is to be autonomous, to be one s own master. But these two aspects of freedom are realized only in a community. Because the social means of self-development are not available to individuals except in a community. For Marx freedom has both negative and positive aspects. Freedom is, on the one hand, freedom from in the sense of a process of overcoming obstacles. Freedom is, on the other hand, "freedom to" realize oneself.

Biocompatible Osteoconductive Polymer와 吸收性 Hydroxyapatite가 骨化에 미치는 影響에 關한 硏究 : A HISTOLOGICAL STUDY

李敏汀,李相喆,柳東睦 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

The purpose of this study was to observe the osteogenic effects of biocompatible osteoconductive polymer(BOP D.T.I. Co., U.S.A.) and resorbable HA(Osteogen ; Impladent Co., U.S.A.) in bony defected area In order to perform this study, 30 male rabbits, weighing about 2.5kg were selected. The 3x5x7mm sized defects were made on the both sides of the mandibular body and the defect was filled with blood clot in control group and with resorbable HA and BOP respectively in experimental groups. All experimental animals were sacrificed at the 3rd day and the 1st, 2nd, 4th and 6th week after operation. The mandibular body and surrounding tissues were removed out, deminerahzed, dehydrated and embedded. The histological observation of the specimens in light microscopic level was performed after Azan staining. The results were as follows 1. Osteoblasts were observed after a eek both in control group and experimental groups, and fibrous tissues were formed in bony defected area. Especially, new bone formation was observed earlier in BOP experimental group than in any other groups. 2. New bone formation was developed from the adjacent normal bone to bony defected area both in control group and experimental groups. And in experimental groups, new bone was infiltrated rapidly into the graft material than in control group and large amount of bone formation was observed. 3. Both in two experimental groups, the resorption pattern of the graft material was observed after 2 weeks, an materials were almost disappeared after 4 weeks. 4. After 6 weeks, bony defected area was occupied with new bone both in control group and in experimental groups, but bony density in experimental groups was higher than in control group, especially in BOP experimental group which showed more mature heating state.

수압저하시 수압과 사용수량의 함수관계를 고려한 배수관망해석

이상목,현인환 대한상하수도학회 2003 상하수도학회지 Vol.17 No.6

The preassure drop below the desired level by pipe failures in water distribution network causes service failure and insufficient water pressure areas. To reduce inconvenience of consumer caused by water pressure drop, these areas need to be predicted accurately. This kind of prediction technique will allow network managers to take appropriate and rapid action, and thus improving the service quality of water supply. For more accurate prediction of the insufficient water pressure area, a functional relationship between water pressure and demand has to be considered. However, the conventional analysis method assumes that all nodal water demands are always constant, even though the water pressure is not sufficient to supply at each node. Therefore, pipe flows can not be estimated correctly, and the insufficient water pressure areas are overestimated than actual. In this study, a new analysis method that can consider the functional relationship between pressure and water demand is suggested. Also, the model network and the real network were analyzed by simulating various pipe failure conditions to compare the results from both methods. As a result, suggested method was found to be more applicable and more accurate for predicting the network behavior under insufficient pressure condition caused by pipe failure in the network.

하악골에 발생한 거대한 cemento-ossifying fibroma의 치험례

이상철,권용대,이백수,김여갑,류동목,박종오 大韓顎顔面成形再建外科學會 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.1

The cemento-ossifying filbroma is a well-demarcated and occasionally encapsulated neoplasm composed of fibrous tissue that contains varying amounts of calcified tissue resembling bone, cementum, or both. The greatest number of cases are encountered during the third and fourth decades of life and there is a definite female predilection, with female-to-male ratios as high as 5 : 1 being reported. The mandible is involved far more than the maxilla, and 90 percent of all cases are located in the mandible. The mandibular premolar-molar area is the most common site. Radiographically, the lesion is most often well defined and unilocular. Depending on the amount of calcified produced in the tumor, it may appear as completely radiolucent : more often it shows varying degrees of radiopacity. Some lesions may be largely radiopaque with a radiolucent halo. On microscopic study, the tumor is composed of fibrous tissue of varying degrees of cellularity containing calcified material. This may be in the form of trabeculae of osteoid and bone or basophilic ovoid calcifications that resemble cementum-like material. Admixture of the two types of calcifications are commonly seen. On this case, large cemento-ossifying fibroma has grown in the mandible and this lesion was treated by complete surgical excision and posterior iliac bone graft. A review of literature and a report of a case of cemento-ossifying fibroma are presented.

담도 및 췌장 악성종양에서의 CAl9-9의 진단적 가치에 대한 평가

명승재,최승목,김은옥,최호순,이성구,김명환,민영일,류진숙 大韓消化器病學會 1995 大韓消化器病學會誌 Vol.27 No.3

도덕의 이데올로기적 기능

이상목 영남철학회 1996 哲學論叢 Vol.12 No.-

발열-흡열반응이 동시에 일어나는 화학반응장치의 안정성 해석

이상록,염치호,장상목,김광 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.1

It was described that relationships between the shape of Y(T) and stability of steady state in a complete mixing type reactor in which exothemic and endothermic reactions were proceed simultaneously. These results could be obtained sufficient conditions to stable any steady state by making use of the linearization theorem. Sufficient conditions for p>0 is Y´(T)<0, for p>0, q>0 is Y´(T)<0 and Y(T)>0, where Y(T)= α_1k_1 (T)+ α_1k_1(T) and Y´(T)=dY(T) /dY(T).

전기투석에 의한 아세트산의 농축 : 이온이동의 모델링 Ion Transport Modeling

이병철,김영목,이상운 弘益大學校 産業技術硏究所 2005 産業技術 Vol.15 No.-

This paper deals with the concentration of acetic acid using monopolar electrodialysis its modeling. Voltage changes, energy consumption were measured at various acetic acid concentrations, pHs, and current densities. Based on the experimental results, mathematical models were developed. Model predictions of acetic acid concentration and pHs were in good agreement with the experimental data.