http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정을영,황희용 강원대학교 정보통신연구소 2007 정보통신논문지 Vol.11 No.-
In this paper, Not only brief reviews for typical baluns of wireless communication systems, such as the Marchand balun, the microstrip balun, etc, but also a design of Balun-BPF, which is a BPF with an unbalanced input and two balanced outputs using a dual-mode ring resonator, are presented. The fabricated Balun-BPF shows 2-pole BPF characteristics with bandwidth of 42 MHz and insertion loss of 2.4 dB at a center frequency of 2.45 GHz. These improved baluns and the Balun-BPF could be useful to design RF/MW/mm-wave systems that require small size and light weight.
정을영,황희용,Jung, Eul-Young,Hwang, Hee-Yong 한국전자파학회 2006 한국전자파학회논문지 Vol.17 No.12
본 논문에서는 한 파장 길이의 이중 모드 링형 공진기를 이용하여 대역 통과 여파기와 발룬의 특성을 동시에 만족하는 Balun-BPF를 제안하였다. 링 공진기의 대칭되는 위치에 각 출력단을 위치시킴으로써 불평형 위상 특성을 얻었고, 입출력단 선로간의 임피던스 차를 통해 이중 모드를 형성하였다. 제작된 Balun-BPF는 중심 주파수 2.45 GHz에서 40 MHz 대역폭과 삽입 손실 2.4 dB를 가지며, $181^{\circ}{\sim}184^{\circ}$의 불평형 위상과 1 dB 이내의 불평형 출력차를 나타내었다. 측정된 주파수 특성 결과는 시뮬레이션 결과와 잘 일치하였다. In this paper, a Balun-BPF with the balun and BPF characteristics is proposed by using dual-mode ring resonator of $1{\lambda}$. We obtained the property of balun with the phase imbalance by symmetrically placing each output of ring resonator. The dual mode has been made by impedance difference between input and output lines. The fabricated Balun-BPF shows bandwidth of 40 MHz and insertion loss of 2.4 dB at a center frequency of 2.45 GHz. It shows the phase imbalance of $180{\sim}184$ degree and the magnitude imbalance of within 1 dB. The measured frequency responses agree well with simulated ones.
정을영,최경,황희용 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B
This paper presents a LTCC Balun-BPF, which is a BPF(band pass filter) with a Balun in a single LTCC chip for the direct interface with a MMIC chip having balanced inputs. The physical dimension of the designed Balun-BPF is 2.4x2.0x0.88 ㎣ and the used dielectric constant E_(r) is 36. A Balun of three-lines structure with striplines and a BPF of comb-line structure was combined into the Balun-BPF. The simulated result shows 4.8dB of insertion loss, 178~179 degree of the phase imbalance, 14dB of the return.
진건,정을영,민창수 대한산부인과학회 1997 Obstetrics & Gynecology Science Vol.40 No.11
Benign fibrous histiocytoma is a tumor composed of a mixture of fibroblastic and histiocytic cells that are often arranged in a cartwheel or storiform pattern and accompanied by varying number of inflammatory cells, foam cells, and siderophages. Benign fibrous histiocytoma represents one of the common soft tissue tumors with most cases presenting in the skin. The common sites of incidence are the limbs, trunk, head, neck, and posterior peritoneal cavity:less commonly, these lesions arise in female reproductive organs. This report documents a case of benign fibrous histiocytoma arising in the ovary of 48 year-old female whose chief complaint was abdominal pain.
김동진,진건,김수련,박교만,정을영,민창수 대한산부인과학회 1996 Obstetrics & Gynecology Science Vol.39 No.10
Currently attention is focused on the testicle as a site of leukemic relapse. However, leukemic involvement of the ovary has been described in several autopy series with an incidnce of 11 to 50 percents in patients with bone marrow relapse, but has rarely been reported during the clinical course of leukemia. But leukemic involvement of the ovaries has received little attention, and the significance of ovary associated relapse in relation to the eventual outcome of the patient has not been investigated. We experienced one case of acute lymphocytic leukemia(ALL) presenting as ovarian tumor. Involvement was also presented in abdominal and pelvic lymph node, mesentery, omentum, and serosal surface. Here we present the case with brief review of literature.
폐경기여성에서 에스트로젠 보충요법시 병행투여된 프로게스테론제제가 골밀도에 미치는 영향
김동진,진건,신용덕,김수련,박교만,정을영,민창수 대한산부인과학회 1997 Obstetrics & Gynecology Science Vol.40 No.2
Estrogen replacement therapy is known to reduce the incidence of cardiovascular disease and osteoporosis in postmenopausal women. Estrogen has beneficial effect on bone density and adding progesterone to estrogen is known to have synergistic effect. However, the effect of progesterone on bone mineral density had not been precisely evaluated in Korean postmenopausal women. To evaluate the impacts of progesterone on bone mineral density during estrogen replacement therapy, we conducted the randomized 2-year trials of conjugated equine estrogen (Premarin 0.625 mg/day) with or without cyclic progesterone(medroxyprogesterone acetate : MPA 10 mg/day for 12 days) in 105 postmenopausal women. Bone mineral density was measured in the lumbar vertebrae(L2-L4) using dual energy X-ray absorptiometry(DEXA) at the beginning of the treatment, 6 onths, 12 months and 24 months later, respectively. In Premarin only group, bone mineral density at 6 months and 12 months after treatment did not show significant difference from baseline value. But bone mineral density on 24 months after treatment showed significantly increased value(p value$lt;0.05) than that of initial. In Premarin plus MPA group, bone mineral density at 12 months and 24 months after treatment showed significantly increased than baseline(p value$lt;0.05). And compared with Premarin only group, Premarin plus MPA group showed significant increase in spinal bone density after 2 years treatment(p value$lt;0.05). These results suggest that the addition of MPA in estrogen replacement therapy appears to increase in bone mineral density more than unopposed estrogen. Thus combination of estrogen and progesterone appeared to be effective long-term prophylactic treatment regimen upon postmenopausal bone loss.