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결합조직형성 법랑모세포종의 방사선학적 소견 : 증례보고 3례
최다혜,허경회,문제운,이원진,허민석,이삼선,최순철,박관수 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1
Desmoplastic ameloblastoma is a rare histologic variant of ameloblastoma. It shows important differences in anatomic distribution, histologic appearance, and radiographic findings compared with the general type of ameloblastoma. It is histologically characterized by an abundance of densely collagenous stroma and radiographically a mixed radiolucent-radiopaque lesion. We present three cases of desmoplastic ameloblastoma. All the patients complained on buccal swelling with or without pain and the sites of occurrence were the anterior and the premolar region. Plain radiographs showed mixed radiopaque-radiolucent lesion with ill-defined or diffuse sclerotic margin and no external root resorption. Additionally, CT scans revealed buccal expansion and relatively well-defined margin of the lesions. The clinical and radiographic features of the presented cases were compared with those of the desmoplastic ameloblastoma in the previous literatures. (Korean J Oral Maxillofac Radiol 2006; 36 : 63-8)
3차원 그래픽스를 이용한 실시간 로봇 모니터링 및 예측
김진구,정다운,전재욱 成均館大學校 科學技術硏究所 1997 論文集 Vol.48 No.1
In industrial automation lines, the main method to transfer information,, about robots is using some digital I/O in robot systems. Through these digital I/O, the state of each robot task is monitored whether it has been performed correctly or not. But this method can only communicate some informations among predefined states of each robot task and do no informations about other states during each robot task. In order to monitor detailed states of robot systems during each task, robot systems have used a video display or a graphics system. Some researches have used graphics systems to make real-time display and replay in addition to off-line simulation. This paper proposes a technique to monitor real time robot motions and to predict robot motions by using 3-d graphics. A graphics system is used to represent a virtual robot so that some c ordination between a real robot and this virtual robot can be achieved. With this coordination, monitoring and prediction of robot, motions will be performed.
Contact electrification behaviors of micro-patterned polydimethylsiloxane
Jin Da Woon,Lee Dong Woo,Ko Young Joon,Jung Jong Hoon 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.1
We have investigated the contact electrification mechanism of identical materials using micro-patterned polydimethylsiloxane (PDMS) polymers. Commercially available sandpapers with various grit sizes were used for systematic control of the micro-patterns. Microstructure and hardness measurements revealed that the micro-patterns of sandpaper were successfully transferred to PDMS without significant change of the Young’s modulus. Clear triboelectric outputs were observed when contact separation was performed for identical PDMS polymers. The triboelectric outputs were significant when the microstructure was different, while the outputs were small when the microstructure was similar. These results were explained by the bond-breaking and ion/material transfer due to the roughness-induced temperature differences in identical PDMS polymers.
( Da Woon Kim ),( Hyo Jin Kim ),( Jin Mi Kim ),( You Hyun Jeon ),( Miyeun Han ),( Eun Young Seong ),( Sang Heon Song ) 대한신장학회 2021 Kidney Research and Clinical Practice Vol.40 No.3
Background: Phosphorus-containing dialysis solution is used to prevent hypophosphatemia in patients undergoing continuous venovenous hemodiafiltration (CVVHDF). This study evaluated the effect of phosphorus-containing dialysis solution on mortality in pa-tients undergoing CVVHDF based on changes in phosphorus and red cell distribution width-coefficient of variation (RDW-CV) levels. Methods: We included 272 patients with acute kidney injury (AKI) who underwent CVVHDF at the medical intensive care unit from 2017 to 2019 and classified them according to Phoxilium (Baxter Healthcare Ltd.), as a phosphorus-containing dialysis solution, use within 48 hours after CVVHDF initiation. Clinical data were collected at baseline and 48 hours after CVVHDF initiation. The primary outcome was all-cause mortality during the follow-up period. Results: The non-Phoxilium (NP) group had higher phosphorus and lower RDW-CV levels than the Phoxilium (P) group (phosphorus, 7.3 ± 4.3 vs. 5.0 ± 2.8 mg/dL; RDW-CV, 14.6 ± 1.9 vs. 15.7 ± 2.6%; all p < 0.001). In the multivariable Cox proportional hazard re-gression of the NP group, an increase in phosphorus and RDW-CV at 48 hours of CVVHDF was associated with mortality (delta phos-phorus: median, >0 mg/dL vs. < -2.0 mg/dL; hazard ratio [HR], 8.62; 95% confidence interval [CI], 2.10-35.32; p = 0.003/delta RDW-CV: median, >0% vs. < -0.2%; HR, 4.34; 95% CI, 1.49-13.18; p = 0.008). Meanwhile, in the P group, an increase in delta RDW- CV was associated with mortality (delta RDW-CV: >0% vs. >-0.2% and <0%; HR, 2.65; 95% CI, 1.12-6.24; p = 0.03), while an in-crease in delta phosphorus was not. Conclusion: In patients with AKI undergoing CVVHDF, the risk factors for all-cause mortality differed according to the initial phospho-rus levels and use of Phoxilium.
A new species with newly recorded genus Docirava Walker, [1863] (Lepidoptera: Geometridae) to Korea
Da-Som Kim,Seung Jin Roh,Sang Wook Park,Hye-Min Byun,Woon Kee Paek,Bong-Kyu Byun 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
The genus Docirava Walker, [1863] belongs to the tribe Chesiadini of the family Geometridae with only 12 described species in the world. The genus could be distinguished from other genera of Chesiadini with the characters, which had been described by walker in original description as follow : “Proboscis slender, rather long….Legs long, very slender; hind tibiae with four rather short and slender spurs”. In this study, the genus Docirava was first recorded with a new species Docirava sp. nov. with DNA barcode. Also, all the available information including images for both of genitalia and adult, wing venation and descriptional study was provided.
INSERTION-OF-FACTORS-PROPERTY WITH FACTORS MAXIMAL IDEALS
Jin, Hai-Lan,Jung, Da Woon,Lee, Yang,Ryu, Sung Ju,Sung, Hyo Jin,Yun, Sang Jo Korean Mathematical Society 2015 대한수학회지 Vol.52 No.3
Insertion-of-factors-property, which was introduced by Bell, has a role in the study of various sorts of zero-divisors in noncommutative rings. We in this note consider this property in the case that factors are restricted to maximal ideals. A ring is called IMIP when it satisfies such property. It is shown that the Dorroh extension of A by K is an IMIP ring if and only if A is an IFP ring without identity, where A is a nil algebra over a field K. The structure of an IMIP ring is studied in relation to various kinds of rings which have roles in noncommutative ring theory.
( Da Woon Kim ),( Geum Suk Jang ),( Kyoung Suk Jung ),( Hyuk Jae Jung ),( Hyo Jin Kim ),( Harin Rhee ),( Eun Young Seong ),( Sang Heon Song ) 대한신장학회 2022 Kidney Research and Clinical Practice Vol.41 No.6
Background: Whether continuous renal replacement therapy (CRRT) should be applied to critically ill patients with both acute kidney injury (AKI) and cancer remains controversial because of poor expected outcomes. The present study determined prognostic factors for all-cause in-hospital mortality in patients with AKI and cancer undergoing CRRT. Methods: We included 471 patients with AKI and cancer who underwent CRRT at the intensive care unit of a Korean tertiary hospital from 2013 to 2020, and classified them by malignancy type. The primary outcomes were 28-day all-cause mortality rate and prognostic factors for in-hospital mortality. The secondary outcome was renal replacement therapy (RRT) dependency at hospital discharge. Results: The 28-day mortality rates were 58.8% and 82% in the solid and hematologic malignancy groups, respectively. Body mass index (BMI), presence of oliguria, Sequential Organ Failure Assessment (SOFA) score, and albumin level were common predictors of 28-day mortality in the solid and hematologic malignancy groups. A high heart rate and the presence of severe acidosis were prognostic factors only in the solid malignancy group. Among the survivors, the proportion with RRT dependency was 25.0% and 33.3% in the solid and hematologic malignancy groups, respectively. Conclusion: The 28-day mortality rate of cancer patients with AKI undergoing CRRT was high in both the solid and hematologic malignancy groups. BMI, presence of oliguria, SOFA score, and albumin level were common predictors of 28-day mortality in the solid and hematologic malignancy groups, but a high heart rate and severe acidosis were prognostic factors only in the solid malignancy group.
Da Woon Jeong,Beom Young Park,Jin Hyoung Kim,In Ho Hwang 한국축산식품학회 2011 한국축산식품학회지 Vol.31 No.4
This study was conducted to validate the theoretical feasibility of a technique to identify biomarkers in Korean native black pig (KNP) and a commercial Landrace breed. Using two-dimensional electrophoresis, we found six proteins (NADH dehydrogenase Fe-S protein 1, an unnamed protein product, similar to T-complex protein 1, annexin V = CaBP33 isoform, fatty acid-binding protein, and catechol O-methyltransferase), which appeared in KNP alone. We raised polyclonal antibodies (used as the primary antibody) for Western blotting to confirm the characteristics of the six KNP proteins. As a result, catechol O-methyltransferase, annexin V = CaBP33 isoform, and the unnamed protein product presented thicker bands in KNP than those in Landrace. Moreover, catechol O-methyltransferase was shown to be more feasible as a biomarker for KNP. However, cross-reactivity was observed with the polyclonal antibodies for KNP and the other three proteins (NADH dehydrogenase, a protein similar to T-complex protein 1, and fatty acid-binding protein). This study only showed limited results from a limited number of animals; however, our research suggests possibilities for future studies.