• 한국CDE학회논문집
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• 제13권6호
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• pp.450-458
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• 2008

Recently, Cartesian grid approach has been popular to generate grid meshes for complex geometries in CFD (Computational Fluid Dynamics) because it is based on the non-body-fitted technique. This paper presents a method of an octree generation and boundary cell clipping using section curves for fast octree generation and elimination of redundant intersections between boundary cells and triangles from 3D triangular mesh. The proposed octree generation method uses 2D Scan-Converting line algorithm, and the clipping is done by parameterization of vertices from section curves. Experimental results provide octree generation time as well as Cut-cell clipping time of several models. The result shows that the proposed octree generation is fast and has linear relationship between grid generation time and the number of cut-cells.

• 한국환경과학회지
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• 제32권2호
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• pp.145-148
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• 2023

The purpose of this study was to investigate the changes in body temperature of canine via their hair lengths before and after grooming. A total of 120 companion canines were used in this study for a total of 6 weeks, and 20 dogs each week consisted of both 10 poodles and 10 malteses (five females and males). For accurate temperature measurement, the anal depth was measured at approximately 1.5 cm. Temperature before and after grooming was measured at 10 am and after more than three hours, respectively. There was statistical significance (p<0.05) in body temperature changes for male poodles at 1, 2, and 3 weeks and for female poodles at 1, 3, 4, and 5 weeks, and the total period showed a statistical difference for both male and female poodles (p<0.05). In addition, male and female malteses had an effect (p<0.05) on changes in body temperature at 1 and 6 weeks and only at 4 weeks, respectively. For total period, there was a statistical difference in male and female poodles (p<0.05). Moreover, when the temperature changes of females were compared, there was no remarkable difference. In conclusion, the body temperatures of both male and female dogs according to the length of their hair were lower after grooming than before grooming. The measurement of body temperature three hours after grooming, which could reduce stress or other factors, is judged to be able to help customers who are worried about clipping.

• Journal of Chest Surgery
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• 제33권1호
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• pp.26-31
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• 2000

Background: This study was aimed at analyzing the preoperative conditions post-operative results indication and methods of surgical closure of patent ducturs arterio년 in prematures low birth weight infants and neonates. Patients and Methods: We retro-spectively studied two groups of patients (prematures group and neonates group) who underwent surgical closure of the patent ductus arteriosus between March 1995 and June 1998. Results: The premature group consisted of 9 patients(3 males and 6 females) Their mean gestational period was 30.7 weeks(ranging from 26 weeks to 33 weeks) mean age 27.8 days(11 days to 55 days) and mean body weight 1.56 kg. Prominent preoperative symptoms were dependency on mechanical ventilation generalized edema and hepatomegaly. We performed PDA ligation via thoracotomy in all premature patients. The neonate group consisted of 16 patients and their mean body weight was 3.75 kg. Major symptoms of this group was tachypnea and intercostal retraction resistant to medical treatment. We performed video-assisted PDA clipping to them all. There were no postoperative complications or operation-related mortality in both groups. Comparing the ratio of size of PDA(mm)/body weight(kg) the ratio of premature group (ligation through thoracotomy) was higher than that of neonate group ( video-assisted clipping) that is 3,89:1.21(p=0.03) Conclusion : We conclude that the surgical closure of PDA can be a safe method of treatment for prematures low birth weight infants and neonates with compromised general conditions. Choice of surgical technique depends on the surgeon's preference but there was a tend-ency to choose the ligation method through thoracotomy for patients with small body weight and large PDA.

• 한국멀티미디어학회논문지
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• 제20권9호
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• pp.1491-1501
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• 2017

In this paper, we propose a method to measure respiration rate by dividing the respiration related region in depth image using level set method. In the conventional method, the respiration related region was separated using the pre-defined region designated by the user. We separate the respiration related region using level set method combining shape prior knowledge. Median filter and clipping are performed as a preprocessing method for noise reduction in the depth image. As a feasibility test, respiration activity was recorded using depth camera in various environments with arm movements or body movements during breathing. Respiration activity was also measured simultaneously using a chest belt to verify the accuracy of calculated respiration rate. Experimental results show that our proposed method shows good performance for respiration rate estimation in various situation compared with the conventional method.

• The Korean Journal of Physiology
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• 제28권2호
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• pp.225-231
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• 1994

The present study was undertaken to investigate the role of endogenous nitric oxide in renin release under different physiological conditions. In the first series of experiments, renin release was either inhibited by acute volume-expansion (VE) or stimulated by clipping one renal artery in the rat. VE was induced by intravenous infusion of saline (0.9% NaCl) up to 5% of the body weight over 45 min under thiopental (50 mg/kg, IP) anesthesia. VE caused a decrease of plasma renin concentration (PRC). With $N^G-nitro-L-arginine$ methyl ester $(L-NAME,\;5\;{\mu}g/kg\;per\;min)$ superadded to VE, PRC decreased further. The magnitude of increase in plasma atrial natriuretic peptide levels following VE was not affected by the L-NAME. In two-kidney, one clip rats, L-NAME-supplementation resulted in a decrease, and L-arginine-supplementation an increase of PRC. Plasma atrial natriuretic peptide levels were significantly lower in the L-arginine group than in the control. Blood pressure did not differ among the L-NAME, L-arginine, and control groups. In another series of experiments, the renin response to a blockade of NO synthesis was examined using in vitro preparations from isolated renal cortex. L-NAME significantly increased basal renin release, although it was without effect on the isoproterenol-stimulated release. These findings suggest that endogenous nitric oxide significantly contributes to the renin release. Since many factors may affect the renin release in vivo, an interaction between NO and renin under various pathophysiological states is to be further defined.

• 한국작물학회지
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• 제30권3호
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• pp.301-309
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• 1985

본 시험은 사료용 맥류의 예취시기별 청예 및 건물수량, TDN%, TDN 수량 등의 품종간 차이를 구명하기 위하여 호밀, 트리티케일, 밀, 보리 등 7개 품종을 공시하여 1983년 10월부터 1984년 5월까지 맥류연구소에서 실시하였던 바 그 결과를 요약하면 다음과 같다. 1. 10a당 청예수량은 4월 20일 채취시. 호밀2호가 929kg로 가장 많았으며 부농(보리), 수원229호(밀), 수원 8호, 수원 9호(트리티케일)의 2배 이상이었다. 4월 30일 예취시에도 호밀 2 호가 2,195 kg으로 가장 많아 타 작물의 2배 이상을 보였고 5월 10일 예취시도 3,506kg으로 가장 많았다. 5월20일 예취시에는 수원8호가 가장 많았다. 2. 10a당 건물수량은 시기가 경과할수록 증가하였으며 4월 20일, 4월 30일, 5월 10일 예취했을 때 호밀2호가 각각 119kg, 305kg, 539kg으로 가장 많았으며 5월 20일에는 호밀 1호가 790kg으로 가장 많았다. 3. 초장은 팔당호밀, 호밀 1호, 호밀2호의 경우 출수 이후까지 계속 증가하였으며 수원229호, 부농, 수원 8호, 수원 9호보다 월등히 컸다. 4. 건물률(건물중/생체중 $\times$ 100)은 시기가 경과할수록 증가하였으며 $m^2$당 경수는 팔당호밀이 많았고 수원9호가 적었다. 엽중비율은 수원8호, 수원9호가 높았는데 시기가 경과할수록 감소하였다. 5. 조단백질, 조지방, 조회분 함량은 생육이 진전됨에 따라 감소하였으며 가용무질소물, 조섬유 함량은 증가하였다. 또한 NDF, ADF, Lignin, Cellulose, Hemicellulose 등의 세포벽 구성물질도 증가하였는데 수원 8호와 부농이 비교적 양질로 나타났다. 6. TDN%는 생육이 진전됨에 따라 감소하였고 TDN 수량(건물수량$\times$TDN%)은 증가를 나타냈는데 전시기를 통하여 볼 때 호밀2호, 호밀 1호, 팔당호밀 등 호밀 품종이 월등히 높았다. 7. TDN 수량과는 청예수량, 건물수량. 초장, 조섬유, Cellulose 등이 정상관을, TDN%, 엽중비율, 조단백 등과는 부상관을 보였다. 8. 수원지방에서 청예용 맥류의 예취시기는 5월10일~5월20일이 적합하며 5월10일 이전은 호밀 2호등 호밀이 5월20일 경은 수원8호 등 트리티케일이 적합한 것으로 생각된다.

• Journal of Gastric Cancer
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• 제7권2호
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• pp.102-106
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• 2007

위에 발생하는 유암종(carcinoid tumor)은 위저부에 있는 장크롬친화 유사 세포(enterochromaffine-like cell)의 증식에 의해 발생하는 종양이다. 위유암종은 모든 위 신생물의 2% 이내로 드문 질환이나 최근 발생률이 증가하고 있다고 한다. 저자들은 다발성 용종의 형태로 발현된 위유암종을 1예 경험한 바 있어 이를 보고하는 바이다. 29세 여자가 3년 전 실신을 주소로 외부병원을 방문하여 시행한 혈액검사 상 혈색소 6.0 g/dl로 측정되었다. 위내시경 상 출혈을 동반한 용종성 병변이 관찰되었고, 내시경적 결찰술로 지혈하였다. 당시 시행한 병리조직 검사 상 유암종으로 진단되었다. 추적 관찰 중 용종성 병변의 출혈로 인한 철결핍성 빈혈이 계속되어 본원으로 전원되었다. 위내시경 상 중체부에서 분문부에 걸쳐 20개 이상의 크기가 다양한 용종성 병변들이 관찰되었다. 혈색소 수치는 9.0 g/dl이었다. 출혈을 동반한 다발성 용종성 위유암종 진단 하에 위전절제술을 시행하였다. 조직검사 결과 위유암종으로 진단되었고 림프절 전이는 없었다. 수술 18개월 후 혈색소 12.8 g/dl로 측정되었고 복부 초음파 상 재발 소견은 없었다. 본 증례와 같이 위에 다발성으로 발생한 용종 형태의 유암종이 지속적인 출혈을 동반하여 만성적인 빈혈을 유발하는 경우 적극적인 수술적 치료를 고려해야 한다.