지역혁신발전과 여성참여 증진 방안 -지역혁신발전과 성 평등(gender equality)에 관한 고찰을 중심으로-

구미현 충남발전연구원 2006 열린충남 Vol.36 No.-

택지개발사업 생태계서비스 평가모형 개발 및 적용

구미현 서울대학교 환경대학원 2014 環境論叢 Vol.53 No.-

오퍼튜니스틱 다중 빔 형성 시스템의 사용자 선택에 따른 성능 향상

구미현,김동우 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.2

오퍼튜니스틱 다중 빔 형성 시스템의 사용자 선택에 따른 성능 향상

구미현(Mihyeon Ku),김동우(Dongwoo Kim) 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.2A

이 논문에서는 오퍼튜니스틱한 빔을 형성하는 시스템에서 다중 파일럿 빔을 이용해 하향링크 데이터 수율을 높이도록 사용자들을 선택하는 스케줄링 방법을 제시한다. 오퍼튜니스틱 빔 포밍 시스템에서는 사용자의 비 균일한 분포와 적은 수에 의해 하향링크로의 데이터 수율 성능이 감소할 수 있다. 이를 개선하기 위해 기존에 연구되어 온 다중 파일럿 빔을 사용하는 다른 두 가지 시스템 모델에서 SINR이 아닌, 빔포머와 각 사용자의 채널 간 이득을 이용하여 스케줄링 하는 방법을 제안한다. 제안한 방법을 통해 사용자들의 분포에 따라 유연하게 데이터를 수신할 사용자를 선택할 수 있다. 수치적 결과에서는 사용자들의 분포가 비 균일하고 수가 적은 경우에, 사용자들로부터 피드 백 받은 SINR 또는 SNR로부터 효율적인 채널 이득을 사용하여 스케줄링을 하는 것과 피드백 받은 SINR만으로 데이터를 수신 할 사용자들을 선택한 경우와 비교하여 제안한 방법에서 60%가량 향상된 데이터 수율 결과를 얻을 수 있음을 보여준다. In this paper, we propose a user selection method to maximize the sum-rate of downlink over opportunistic beamforming. The throughput of an opportunistic beamforming with non-uniformly distributed or a small number of users can decrease. In order to improve the throughput, we propose a scheduling method that does not use SINR or SNR but uses the effective channel gain of each user obtained from the SINR or SNR feedback. The proposed method makes it possible to select users flexibly according to the distribution of users. In numerical results, we show that the proposed methods improve the average sum-rate about 60% when users are distributed non uniformly.

연구논문 : 생물다양성 평가기법의 국내외 연구동향 분석 및 환경영향평가 적용가능성에 대한 연구

구미현 ( Mee Hyun Koo ),이동근 ( Dong Kun Lee ) 한국환경영향평가학회 2012 환경영향평가 Vol.21 No.1

Biodiversity is a key element of ecosystem of which function provides essential product and service in human life. In the course since development projects often causes damages to biodiversity, environmental impact assessment technique must be capable of accurately assessing potential impact from flora and fauna and to entire ecosystem. Korea needs improvement of its assessment technique that is compatible with Korean environmental regulatory standard that is generally stricter than that of most countries. This study attempts to explore both domestic and overseas biodiversity assessment techniques and analyze each stage of environmental impact assessment. The data is collected from numbers of literatures selected by navigating both domestic and overseas literature database with certain keywords. Among the 44 selected papers, overseas publications outnumber those of domestics, and there are more researches on assessment methodology of biodiversity than assessment tool and model. In terms of environmental impact assessment, the number of papers on environmental impact forecast exceeds the numbers of papers on current state of environment and the impact minimizing solution. Therefore, contents and trends of those researches in the different stages of environmental impact assessment discussed in this paper not only suggest potential impact on biodiversity and minimization solutions in detail, but is also a valuable resource particularly for biodiversity relevant environmental assessment technique improvement in Korea. Proposing of a new direction of improvement in biodiversity assessment techniques makes this study significant, and further research for preservation of biodiversity should follow up to provide an improvement scheme for biodiversity assessment techniques in the future.

다른 셀로부터의 간섭을 고려한 다중안테나 제로 포싱 빔 형성 시스템의 성능 최대화

구미현(Mihyeon Ku),김동우(Dongwoo Kim) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.7

The sum-rate capacity of multi-antenna broadcast channels recently has attracted much research interests. However, those effort mainly has focused on a single-cell system. In this paper, we consider a multi-cell system where a transmitter uses zero-forcing beamforming with multiple antennas. We select a linear zero-forcing weight that maximizes the sum-rate when intercell interference exists. With numerical investigation, we will show the sum-rate gain achieved by the proposed method gets larger when the number of interfering cells increases.

다중 안테나를 갖는 빔 포밍 시스템의 송/수신 제로 포싱 빔 형성

구미현(Mihyeon Ku),김동우(Dongwoo Kim) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11

We consider a single-cell multiple-input multiple-output (MIMO) downlink channel where linear transmission and reception strategy is employed. For the case when the channel of the scheduled users is available at the base station (BS), we propose a iterative joint design of the transmit and the receive beamformers. The proposed method can handle multiple antennas at the as and at the mobile user. In numerical results, we will show the sum-rate gain achieved by the proposed method.

정책형성단계에서 생태계서비스에 관한 이론적 고찰

구미현 ( Mee Hyun Koo ),이동근 ( Dong Kim Lee ),정태용 ( Tae Yong Jung ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2012 한국환경복원기술학회지 Vol.15 No.5

잉어육과 잉어자숙(煮熟)중의 아미노산 및 지방산조성의 변화

구미현(Mi-Hyun Koo),승정자(Chong-Ja Sung) 한국식품영양과학회 1986 한국식품영양과학회지 Vol.15 No.3

생시료인 잉어육과 가열시간에 따른 잉어자숙액의 조단백질, 칼슘, 인, 지방산 및 구성아미노산의 함량변화를 측정검토하였으며, 실험결과를 요약하면 다음과 같다.<br/> 1. 단백질, 인 및 아미노산은 생시료인 잉어육이 가장 높은 함량을 나타낸 반면, 칼슘과 지방산은 12시간가열시에 가장 높은 함량을 나타냈다.<br/> 2. 조단백질은 생시료인 잉어육이 17.26%였고 가열시간(3, 6, 9, 12)별 추출량은 각각 5.38%, 9.14%, 10.48% 및 15.68%였다.<br/> 3. 칼슘은 생시료인 잉어육이 11㎎/100g이었고 가열시간에 따른 추출량은 3, 6, 9 및 12시간별로 각각 6.7㎎/100g, 8.8㎎/100g, 11.6㎎/g 및 16.9㎎/100g이었으며, 이는 각 시간마다 약 30~40% 정도씩 증가하였다.<br/> 4. 인은 생시료인 잉어육이 200㎎/100g이고 가열시간에 따른 추출량은 각각 3시간이 106.4㎎/100g 6시간이 109.3㎎/100g, 9시간이 120.1㎎/100g 및 12시간이 144.5㎎/100g이었으며 9시간에서 12시간사이에 가장 많이 증가하였다.<br/> 5. 총지방산은 생시료인 잉어육이 9.3%이고 가열시간에 따른 추출량은 3, 6, 9, 12시간별로 각각 0.44%, 6.15%, 6.77%, 12.14%였다. 총지방산은 6시간에서 9시간사이(10%)를 제외하고는 현저히 증가했다.<br/> 6. 총지방산에 대한 불포화지방산의 비율은 총지방산에 대한 포화지방산의 비율보다 높았으며 생시료일 때가 69.7%이고 각 자숙시간(3, 6, 9, 12)에 따라 64.8%, 73.4%, 74.0%, 73.1%였다. 또한 불포화지방산중에는 C18:1산, C18.2산의 함량이 높았다.<br/> 7. 아미노산조성에 있어서 필수아미노산은 valine, leucine, lysine, arginine이 높은 함량을 나타냈으며 비필수아미노산은 aspartic acid, glutamic acid, alanine이 다량 추출되었다. 비필수아미노산중 serine, proline, lysine 등의 함량은 극히 낮았다. 이로써 잉어와 잉어자숙액은 다른 생선에 비해 영양학적인 측면에서 권장할 만한 양질의 단백질, 지방 및 인의 급원식품이라고 생각된다. Contents of crude protein, calcium phosphorous, fatty acids, and amino acids in raw flesh and cooked broth of carp were determined.<br/> Quantative changes of the nutrients in cooked broth of carp were investigated during boiling time (3,6,9 and 12 hours).<br/> In case of quantative changes of the nutrients such as crude protein, calcium, phosphorous, fatty acids and amino acids in raw flesh of carp and cooked broth of carp during boiling time: All nutrients were increased with boiling time. And they marked maximum level at 12 hours of cooking time except calcium and fatty acid. The amount of unsaturated fatty acid to total fatty acids was larger than those of saturated fatty acid to total fatty acids. The amount of oleic acid and linoleic acid was larger than any other fatty acid.<br/> The major components of essential amino acids were shown to be valine, leucine, lysine and arginine, and the minor conponents of essential amino acids were methionine and histidine.<br/> In nonessential amino acids, the major components were aspartic acid, glutamic acid and alanine, and the minor components were serine, proline and cystine.<br/> The results suggest that the raw flesh and the cooked broth of carp are good sources as protein, fat and phosphorous.

A Randomized Controlled Trial of an Internet-Based Mentoring Program for Type 1 Diabetes Patients with Inadequate Glycemic Control

서성환,진철,구미현,이선영,조민자,심강희,진상만,배지철,김재현 대한당뇨병학회 2014 Diabetes and Metabolism Journal Vol.38 No.2

Background: To determine whether an internet-based mentoring program can improve glycemic control in subjects with type 1 diabetes mellitus (T1DM). Methods: Subjects with T1DM on intensive insulin therapy and with hemoglobin A1c (HbA1c) ≥8.0% were randomized to mentored (glucometer transmission with feedback from mentors) or control (glucometer transmission without feedback) groups and were examined for 12 weeks. Five mentors were interviewed and selected, of which two were T1DM patients themselves and three were parents with at least one child diagnosed with T1DM since more than 5 years ago. Results: A total of 57 T1DM adult subjects with a mean duration after being diagnosed with diabetes of 7.4 years were recruited from Samsung Medical Center. Unfortunately, the mentored group failed to show significant improvements in HbA1c levels or other outcomes, including the quality of life, after completion of the study. However, the mentored group monitored their blood glucose (1.41 vs. 0.30) and logged into our website (http://ubisens.co.kr/) more frequently (20.59 times vs. 5.07 times) than the control group. Conclusion: A 12-week internet-based mentoring program for T1DM patients with inadequate glycemic control did not prove to be superior to the usual follow-up. However, the noted increase in the subjects’ frequency of blood glucose monitoring may lead to clinical benefits.