溫州蜜柑(Cirus unshiu Marc.) 葉內 Abscisic Acid 含量의 李節的 變化와 器官別 脫離에 관한 硏究

許仁玉,申昌勳 제주대학교 1991 논문집 Vol.33 No.-

溫州蜜柑(Citrus unshiu Marc.) 葉內 Abscisic acid(ABA) 含量의 季節的 變化 및 器官別 脫離에 따른 ABA 含量의 差를 HPLC로 分析한 結果는 다음과 같다. 1. 葉內 ABA 含量의 季節的 變化는 1~4月에 비교적 낮았으며, 7月에 가장 높은 반면 8月에 급격히 減少한 후, 12月까지 완만하게 增加하였다. 2. 꽃의 發達에 따른 ABA 含量의 變化는 開花후 增加하는 傾向을 나타냈고, 특히 脫離되는 時期에 가장 많았다. 3. 잎과 과실의 脫離에 따른 ABA 含量은 脫離直前의 離層部位에서 가장 많았다. The present study was conducted to investigate seasonal changes of ABA content in the leaves and differences of ABA content according to abscission in organs of Citrus unshiu Marc. ABA content was determined by HPLC. 1. Seasonal changes of ABA content in liaves were relatively low from January to April and were the highest in July. On the other hand, ABA content was decreased rapidly in August and then increased gradually until December. 2. The content of ABA during development of flower increased after blooming and was especially the highest in abscission stage. 3. The content of ABA according to abscission of leaves and fruits were the highest in abscission zone before abscission.

Spidery 메쉬 인터페이스와 뷰 모핑을 이용한 두 이미지로부터의 효율적인 3차원 애니메이션

조항신(Hang-Shin Cho),김창헌(Chang-Hun Kim) 한국정보과학회 2001 정보과학회 컴퓨팅의 실제 논문지 Vol.7 No.2

본 논문은 동일 장면을 나타내는 한 쌍의 이미지를 이용한 효율적인 3차원 애니메이션 기법을 제안한다. 간단하고 빠른 애니메이션을 위해 그림 속으로의 여행은 한 장의 이미지에서 시점의 깊이 이동을 가능하게 하지만 전경물체의 표현이 시점의 좌우 변환의 사실감을 고려하지 않으며, 뷰모핑은 두장의 이미지 사이의 2차원 변환만을 이용하지만 시점의 이동이 두 카메라의 중심을 잇는 선상으로 제한된다는 단점이 있다. 본 논문은 두 기법의 단점을 서로 보완하여 시점의 깊이 이동뿐 아니라 좌우이동에서도 자연스러운 영상을 생성하는 새로운 애니메이션 기법을 제안한다. 본 논문에서는 배경 장면을 spidery 메쉬로부터 복원된 간단한 직육면체모델에 매핑하고, 관찰자가 주의 깊게 인식하는 전경물체에 대해서는 두 입력 이미지의 투영중심을 잇는 직선상에 평행한 시점의 이동에만 제한적으로 뷰모핑을 적용하여 장면전체의 이미지 픽셀들에 대한 3차원 정보의 복원 비용을 줄이면서도 시점이동의 사실감을 높인다. 두 전경물체 사이의 선형보간 파라미터는 두 spidery 메쉬 간의 차이와 이에 대응하는 배경모델에서의 3차원시점 변환과의 관계로부터 결정된다. 실험을 통해 제안방법이 간단한 인터페이스만으로도 사실감을 유지하는 자유로운 3차원 시점이동의 애니메이션을 생성함을 보인다. This paper proposes an efficient walkthrough animation from two images of the same scene. To make animation easily and fast, Tour Into the Picture(TIP) enables walkthrough animation from single image but lacks the reality of its foreground object when the viewpoint moves from side to side, and view morphing uses only 2D transition between two images but restricts its camera path on the line between two views. By combining advantages of these two image-based techniques, this paper suggests a new virtual navigation technique which enable natural scene transformation when the viewpoint changes in the side-to-side direction as well as in the depth direction. In our method, view morphing is employed only in foreground objects , and background scene which is perceived carelessly is mapped into cube-like 3D model as in TIP, so as to save laborious 3D reconstruction costs and improve visual realism simultaneously. To do this, we newly define a camera transformation between two images from the relationship of the spidery mesh transformation and its corresponding 3D view change. The result animation shows that our method creates a realistic 3D virtual navigation using a simple interface.

평활근종으로 오인된 샘근육증에서 기원한 투명세포암

신유정 ( Yoo Jeong Shin ),조세은 ( Se Eun Cho ),성창옥 ( Chang Ohk Sung ),최철훈 ( Chel Hun Choi ),배덕수 ( Duk Soo Bae ) 대한산부인과학회 2011 Obstetrics & Gynecology Science Vol.54 No.9

The incidence of cancer from adenomyosis is rare. Previously, only two cases of clear cell adenocarcinoma (CCA) arising from adenomyosis have been reported in English literature. Here, we report a case of CCA arising from adenomyosis. A 52-year-old postmenopausal Korean woman presented with complaints of vaginal bleeding and back pain. Endometrial biopsy revealed endometrial polyp with atrophic change and transvaginal ultrasonography showed myomas with cystic change. Magnetic resonance imaging revealed a cystic degenerative mass consistent with leiomyoma in the posterior portion of uterus body. And the serum level of CA-125 was 17.7 U/mL. Hysterectomy revealed a yellow-ten solid mass in the myometrium that was diagnosed as CCA arising from adenomyosis, The tumor was mainly located in the myometrium and transition between adenomyosis and CCA along with endometrial stromal cell was identifi ed, Malignant tumor arising from adenomyosis could be considered as a differential diagnosis when the patient with adenomyosis and intact endometrial surface complained of vaginal bleeding.

Scintigraphy를 이용한 척수 손상 환자와 정상인의 담즙 배설양상 비교

신용일,양충용,주민철,위훈,정환정,김창근,길은영 圓光大學校 醫科學硏究所 2004 圓光醫科學 Vol.19 No.1

정반 평면도 평가를 위한 측정점의 합리적인 개수의 결정

신상철,현창헌,박흥식 江原大學校 産業技術硏究所 1998 産業技術硏究 Vol.18 No.-

The flatness is the most important nature for the surface table. For finding such a flatness, the surface is surveyed along a number of straight lines parallel to the edges of table, which form a grid. Next, the variations in height of the grid points are measured relative to a datum point. If the number of such points is increased. It is not necessarily to use many grid points for finding the original flatness ofa measured surface tabel. So it is necessary to find the rational quantity of such grid points. It is found that about 220 points per 1 m? of surface tabel for measurement is the rational quantity with less than about 15% error of the original flatness.

나노파이버 기반의 의료용 지지체 제작 기술 및 응용

신호준,이창훈,조인희,김인애,이용재,박기동,신정욱 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

Utilizing the electrospinning technique nanofiber-based biodegradable scaffolds made of PLGA was suggested. Under various conditions, their diameters and porosity as well as mechanical strength were evaluated. In addition to those, cell(chondrocyte) proliferation and formation of extracelluar matrices were also investigated along with the conventional membrane type PLGA scaffolds for the potential use in tissue engineering. As conclusions, this type of scaffold showed a potential of application to tissue engineering in view of mechanical stability as well as cellular responses.

평면도의 최소 영역 평가에서 유전자 알고리듬과 심플렉스 방법의 비교

현창헌,신상철 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.B

The definition of flatness is given by ISO. ANSI, KS. etc. but those standards don't mention about the specific methods for the flatness. So various solution models that are based on the Minimum Zone Method have been proposed as an optimization problem for the minimax curve fitting. But it has been rare to compare some optimization algorithms to make a guideline for choosing better algorithms in this field. Hence this paper examined and compared Genetic Algorithm and Simplex Method to the evaluation of flatness. As a result. Genetic Algorithm gave the better or equal flatness than Simplx Method but it has the inefficiency caused from the large number of iteration. Therefore, in the future. another researches about alternative algorithms including Hybrid Genetic Algorithm should be achieved to improve the efficiency of Genetic Algorithm for the evaluation of flatness.

광대역 입력신호를 위한 선형 트랜스컨덕터와 Multiplier의 설계

尹暢焄,吳成根,辛烘圭,金東龍 全北大學校 1993 論文集 Vol.36 No.-

The linear transconductor and analog four-quadrant multiplier are designed. The DDA(differential difference amplifier) of new active component can be improved matching problems of external elements in op-amp application circuits. We have designed transconductor which have excellent linearity and is the most important block in DDA. And analog four-quadrant multiplier is designed using the designed transconductor and MOSIS 2㎛ design rule. We are simulated the linear transconductor and analog multiplier by SPICE program.

뇌실외 배액술 시행과 관련된 뇌실염 : 원인균주와 경험적 치료약제의 적절성

도병훈,김신우,오종택,손종원,하상우,이응갑,장현하,이종명,김능수 대한감염학회 2005 감염과 화학요법 Vol.37 No.2

목적 : 본 연구는 뇌실외 배액술을 시행한 신경외과 환자들에서 뇌실염 발생 빈도, 원인균주와 감수성 추이 및 경험적 치료로 사용되는 항생제인 ceftazidime과 vancomycin의 적절성 여부에 대하여 조사하였다. 재료 및 방법 : 2000년 12월부터 2003년 10월까지 EVD를 시행한 경북대학교병원 신경외과 입원환자 340명 중 뇌실염이 발생한 39명을 대상으로 후향적으로 조사하였다. 결과 : 340명 중 39예 (11.5%)에서 뇌실염이 발생하였고 이들 가운데 4명이 뇌실염과 연관하여 사망하였다(10.3%). EVD 시행일로부터 뇌실염 발생까지는 평균 8.4일이었다. 원인균은 33예(87.1%)에서 확인되었으며 Aci-netobacter (19예, 45%), methicillin-resistant coagulase negative Staphylococcus (9예, 22%), methicillin-resistant Staphylococcus aureus (9예, 22%) 등의 순이었다. 가장 많이 동정된 Acinetobacter 19예 중에서 8예(42.1%)가 ceftriaxone에 내성을 보였으며 현재 경험적으로 널리 사용되는 ceftazidime에 대해서는 11예중 3예(27%)가 내성을 보였다. 결론 : 최근 EVD 시행과 관련된 뇌실염 뇌실염 최근 그람음성 non-fermenter 특히 Acinetobacter에 의한 경우가 증가하고 있으며, 이들 그람음성 non-fermenter는 현재까지 경험적으로 사용되는 ceftazidime에 점차 내성을 보이고 있다. 경험적 치료제에 대한 성공률을 높이기 위해서는 각 병원별 내실염의 원인균주의 감수성에 대한 검사가 필요하겠다. Purpose : To investigate the etiologic microorganisms of external ventricular drain (EVD)-related ventriculitis and the appropriateness of using ceftazidime and vancomycin as an empiric therapy in neurosurgical patients with EVD-related ventriculitis. Materials and Methods : Retrospective analysis of 39 patients with EVD-related ventriculitis among 340 neurosurgical patients to whom EVD had been placed during December 2000 and October 2003 at Kyungpook National University Hospital. Results : Thirty-nine EVD-related infections (39/340, 11.5%) occurred and the attributable mortality rate was 10.3% (4/39). The average duration from the ventricular catheter placement to the development of ventriculitis was 8.4 days. All patients with EVD infection had fever and 89.7% (35/39) of the patients showed nuchal rigidity. The positive culture rate in CSF was 87.1% (34/39) and the frequency of individual organism is as follows : Acinetobacter 45% (19 cases), methicillin-resistant coagulase negative Staphylococcus 22% (9 cases), methicillin-resistant Staphylococcus aureus 22% (9 cases), Enterococcus 5% (2 cases), Streptococcus pneumoniae 3% (1 case), non-fermenting gram-negative bacilli 3% (1 case). The polymicrobial infection rate was 15.4% (6/39). Among 19 cases of Acinetobacter infection, 42.1% (8/19) of the strains showed resistance to ceftriaxone and 15.7% (3/11) to ceftazidime. However, all cases were sensitive to meropenem. Conclusion : These findings show that the major etiologic organisms causing EVD-related ventriculitis have recently changed to Gram-negative non-fermenters, especially Acinetobacter. Because Gram-negative non-fermenting rods resistant to ceftazidime are increasing, an immediate change from ceftazidime plus vancomycin, the widely accepted empiric antibiotic therapy, to meropenem plus vancomycin should be considered when clinical symptoms and signs show no improvement or even deterioration.

유기박막 광도파로형 바이오(칼슘이온)센서의 개발

강신원,박이순,김성훈,김창원 경북대학교 센서기술연구소 1955 연차보고서 Vol.1995 No.-

본 연구는 고감도, 빠른 응답특성 및 넓은 센싱범위를 갖는 능동형 유기박막 광도파로형 칼슘이온센서를 개발하였으며, 이와 병행하여 중성 ionophore와 함께 특정 음이온 선택성의 색소(LAD : lipophilic anionic dye)를 설계·합성을 하였다. 유기박막 광도파로형 칼슘이온센서는 감지막 자체를 박막광도파로화 함으로써 빠른 응답시간과 고감도의 특성을 가졌으며, 514㎚ 광원에서 10^-6∼1M의 범위의 Ca^++ 의 농도를 측정할 수 있었다. 또한 새로이 합성된 LAD의 칼륨이온선택성을 분광측정으로 평가한 결과, 광이온센서(optode)들의 변색성 이온감응물질로서 사용이 가능함을 확인하였다. A new approach to the design and construction of thin-film optical waveguide Ca^+2 sensor has been developed by using a copolymer matrixed membrane that incorporates a cation-selective neutral ionophore, H^+-selective neutral chromo-ionophore, and lipophilic anionic sites in the same plasticized copolymer membrane. This sensor is based on absorption measurement, and it makes use of host molecules that change their optical properties through an actual ion-sensitivity recognition process. In parallel, the high ion-selective lipophilic anionic dye(LAD) was synthesized and evaluated. Proposed ion sensor, utilizing thin film membrane which is the waveguide itself, exhibited rapid response time and high sensitivity. And sensor could detect a wide range of Ca^++ concentrations ranging from 10^6 ∼ 1M by measuring the absorbance change at 514㎚ of light. The newly synthesized LAD showed its potential applicability as chromoionophore for optodes and/or thin-film optical waveguide sensors.