• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2004년도 춘계학술발표대회논문집
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• pp.794-797
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• 2004

본 논문에서는 처리시간을 줄이고, 인식률을 높이기 위해서 이진화된 지문 이미지를 효율적으로 처리하기 위한 자료 구조인 Union and Division을 이용한 이진화와 잡음 제거, 특이점 추출 단계로 이루어진다. Union and Division을 사용하는 경우에서는 융선을 추적 가능하다는 성질을 이용하여서 동일융선 상에 있는 두 개의 특이점을 잇는 선분을 기준점으로 하는 정합 알고리즘을 제안한다.

• 대한수학회논문집
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• 제31권4호
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• pp.683-693
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• 2016

In [1], the authors proved that the finite union of linear star-configurations in $\mathbb{P}^2$ has a generic Hilbert function. In this paper, we find the minimal graded free resolution of the union of two linear star-configurations in $\mathbb{P}^2$ of type $s{\times}t$ with $\(^t_2\){\leq}s$ and $3{\leq}t$.

• Korean Circulation Journal
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• 제53권1호
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• pp.49-51
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• 2023

• Tribology and Lubricants
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• 제23권6호
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• pp.272-277
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• 2007

Various type of rotary unions are widely used to provide fluids between rotating parts. To prevent fluid leakage, most of the rotary unions adopt mechanical seals which is highly reliable but too expensive and complicate. In this paper, a simple lip seal system made of PTFE is adopted in designing of a compact rotary union. Using MARC, the behavior characteristics of lip seal are investigated for seal mounting process, and obtained variations of contact pressure distribution and contact width with interferences and fluid pressures. The results showed that contact width are increased with interference and pressure. The maximum contact pressure are also increased up to a certain interference and pressure, however, then decreased. The numerical methods and results can be applied in designing and performance improvement of lip seal adopted rotary union, and further extensive studies are required.

• Journal of Korean Neurosurgical Society
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• 제59권2호
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• pp.161-164
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• 2016

Few preoperative extrapontine myelinolysis (EPM) cases with pituitary adenoma have been reported. No such case had long follow-up to see the outcome of EPM. We reported a 38-year-old man complaining of nausea, malaise and transient loss of consciousness who was found to have severe hyponatremia. Neurologic deficits including altered mental status, behavioral disturbances, dysarthria and dysphagia developed despite slow correction of hyponatremia. Endocrine and imaging studies revealed hypopituitarism, nonfunctional pituitary macroadenoma and extrapontine myelinolysis. Transsphenoidal surgery was performed after three weeks of supportive therapy, when neurological symptoms improved significantly. The patient recovered function completely 3 months after surgery. Our case indicates that outcome of EPM can be good even with prolonged periods of severe neurologic impairment.

• Journal of the Korean Wood Science and Technology
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• 제44권6호
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• pp.903-912
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• 2016

Morphological and anatomical evaluation of grafted P. merkusii have been undertaken to obtain the information about compatible and incompatible symptoms of 18 years old grafts based on morphological observation and microscopic analysis. Samples of compatible and incompatible grafts were obtained from previous research conducted by the Silviculture Departement Team in 1994. Result showed that compatible grafts have normal stem form and secondary growth (diameter growth), but some abnormality symptoms like undulated pattern of annual growth rings, phloem thickening and abnormality resin ducts in inner and middle parts of the union area occurred. Incompatible ones showed abnormality of the stem form, cortex-bark necrosis and swelling in the union area. Microscopic observation showed abnormality of all parts of the union, undulated pattern of annual growth rings, phloem thickening, abnormal resin ducts, low numbers and discontinuity of vascular elements in the union area.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.686-689
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• 2004

As the demands of X-Y linear motors increase, it becomes very important to measure flatness errors and to compensate them. In this study, in order to investigate flatness errors, a laser interferometer is used for measurement. To improve the measurement efficiency, a Union Jack method is adopted instead of a square method. The square method is frequently used because of its accuracy, but it requires many measurement points. In this study, the Union Jack method with Grey Theory is used. By using the Grey Theory, unmeasured data are predicted, and these are compared with results of the square method. The results show that the Union Jack method with Grey Theory is accurate enough to replace the square method.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2017년도 춘계학술발표대회
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• pp.974-975
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• 2017

본 논문에서는 생체지문인식의 전처리 단계에서 정보 손실여부를 판단할 수 있는 중요한 파트인 전처리 이진화를 보다 효율적으로 수행하기 위한 알고리즘을 제안한다. 제안된 알고리즘은 각 인접 픽셀의 값을 계산하고, 적응적으로 이진화 여부를 판단 및 지문방향에 대한 방향성 향상을 통해, 융선(ridge)와 골(Valley)의 구분이 명확하지 않은 영역에서 발생하는 생체지문 데이터 손실과 연산량을 개선하였다. 본 논문의 성능평가를 위해 미국 NIST에서 제공하는 MINEX 지문샘플 데이터를 사용하였다. 모의실험 결과 기존 전처리 알고리즘보다 연산량은 평균 50% 감소하였고, 지문정보 손실 영역 부분이 효과적으로 개선됨을 확인하였다.

• Fisheries and Aquatic Sciences
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• 제23권4호
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• pp.11.1-11.11
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• 2020

We tried to find the optimal growth conditions of sea cucumber and to analyze the economic effectiveness of the sea cucumber seedling release project in Korea. We first examined the optimal growth conditions of sea cucumber in the relating literatures. Then, we analyzed the economic effectiveness of the sea cucumber seedling release project of the Woncheon fishing village union of Gyeongnam Province in 2016-2018 by using the cost benefit analysis method. The net income of the release project of the Woncheon fishing village union was 69,850 Korean won. The benefit to cost ratio of the sea cucumber seedling release project of the Woncheon fishing village union was estimated to be 1.7, indicating that the project was economically feasible. In order to improve the economic feasibility of the sea cucumber release project, as we see in the case of the Woncheon fishing village union, it is necessary to manage the purchase of the sea cucumber seedling, to improve the recapture rate of sea cucumber, and to manage marketing of sea cucumber.

• 한국중재학회지:중재연구
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• 제28권2호
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• pp.201-216
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• 2018

After the adoption of the Lisbon Treaty, the European Union's Common Commercial Policy now belongs to the exclusive competence area of the EU, including the foreign direct investment (FDI) policy. Regarding the bilateral investment protection treaties (BITs) between the EU Member States, the European Commission is of the view that such BITs should be discarded. On March 6, 2018, the Court of Justice of the European Union (CJEU) held in the Achmea BV v. Slovakia case that a BIT between the EU Member States, as well as arbitral awards based on that BIT, is not subject to request for preliminary rulings under the Treaty on the Functioning of the European Union (TFEU), and thus they are not compatible with the EU law. However, the judgment did not silence the controversy. Instead, many people questioned the legal reasoning and the legitimacy of judgment, and therefore the problem is still ongoing.