• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1252-1255
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• 2013

오늘날 급변하는 IT 환경에 신속하게 대응하기 위한 기업의 데이터 관리시스템의 중요성이 강조되고 있다. 특히, 최근에는 기업의 시스템이 복잡해지고 데이터의 규모가 점점 대형화 되면서 기업들은 데이터 관리를 위해 메타데이터 관리시스템의 활용이 증가하고 있다. 하지만 현재 도입되는 메타데이터 관리시스템은 테이블 이관 시 모델과 실제 데이터베이스 사이의 정합성을 유지하기 위해 불필요한 반복적인 프로세스를 수행해야 하는 문제점을 가진다. 따라서 본 논문에서는 이러한 문제점을 해결하기 위하여 이관관리 프로세스 개선을 위한 메타데이터 관리시스템을 구현하고 테스트 하였다.

• BMB Reports
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• v.56 no.4
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• pp.225-233
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• 2023

Hepatocellular carcinoma (HCC) is a very common form of cancer worldwide and is often fatal. Although the histopathology of HCC is characterized by metabolic pathophysiology, fibrosis, and cirrhosis, the focus of treatment has been on eliminating HCC. Recently, three-dimensional (3D) multicellular hepatic spheroid (MCHS) models have provided a) new therapeutic strategies for progressive fibrotic liver diseases, such as antifibrotic and anti-inflammatory drugs, b) molecular targets, and c) treatments for metabolic dysregulation. MCHS models provide a potent anti-cancer tool because they can mimic a) tumor complexity and heterogeneity, b) the 3D context of tumor cells, and c) the gradients of physiological parameters that are characteristic of tumors in vivo. However, the information provided by an multicelluar tumor spheroid (MCTS) model must always be considered in the context of tumors in vivo. This mini-review summarizes what is known about tumor HCC heterogeneity and complexity and the advances provided by MCHS models for innovations in drug development to combat liver diseases.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.335-338
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• 2020

본 연구에서는 실생활에서 기존 쓰레기통에 의해 거동이 불편한 사람들이 겪는 불편사항에 대한 문제점을 해결하는 시스템을 설계 및 구현하였다. 스마트폰을 이용한 블루투스와 아두이노 간에 통신을 통해 쓰레기통을 이동 시켜 위치를 제어하며, 자동 개폐 시스템을 통해 쓰레기통의 입구를 자동으로 제어하는 기능을 구현하였다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2022.06a
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• pp.186-189
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• 2022

스마트팜 피노믹스 시스템은 재배하는 식물의 성장조건에 맞게 생육 환경을 일정하게 유지하고 관리하는 장치이지만, 그럼에도 불구하고 식물의 질병은 여러 가지 이유로 발생할 수 있다. 본 논문에서는 스마트팜 피노믹스 시스템에서 Mean Shift Segmentation 을 통한 식물의 질병을 자동으로 검출하는 식물 질병 검출 알고리즘을 제안한다. 식물의 질병 정도가 임의의 임계값을 넘을 경우, 해당 식물을 질병의 정도가 심한 식물로 판별하고, 적절한 수확시기를 결정하여 더 나은 상품성을 가진 식물을 재배할 수 있는 방법을 제시한다. 또한 식물의 질병이 급격하게 심해지는 기간을 확인하여 인간의 개입 없이 완전히 자동화된 시스템으로 더욱 세심하고 효율적인 식물 재배를 가능하게 함을 제시한다. 본 논문에서는 아이스버그(양상추)에 대한 재배 환경을 구축하여 생장 기간에 아이스버그에 발생하는 질병인 팁번 현상을 검출하는 실험을 진행하였다. 본 논문에서 제안한 방법은 다른 종류의 다양한 식물에서도 질병 검출이 가능하며, 스마트팜 피노믹스 시스템에서 질병 검출의 자동화를 위한 한 가지 방법으로 활용될 수 있을 것으로 기대된다.

• Journal of Korean Medical classics
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• v.13 no.2 s.17
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• pp.14-20
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• 2000

Both of the three Um and three Yang and the six hyo(六爻) of Iching are based on Um and Yang theory and five phases theory. This paper is about mutual relation of them. First, every change in the universe is induced by Un and Ki. Un is the nature that things have their own. Ki is surroundings that things change in. Second, Un and Ki are not separate things. That is they are generated by each other. Third, both of them are the signs of change which means they are similar. The first Hyo (初爻) and Kwolum-pungmok(厥陰風木), the seond Hyo(二爻) and Soum-gunhwa(少陰君火), the third Hyo(三爻) and Teum-supto(太陰濕土), the forth Hyo(四爻) and Soyang-sanghwa(少陽相火), the fifth Hyo(五爻) and Yangmyung-zogum(陽明燥金), and the sixth Hyo(六爻) and Teyang-hansu(太陽寒水) have similar principles. It is important to make clear up their meanings and mutual relation.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.49 no.3
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• pp.261-269
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• 2013

The age and growth of the Pacific cod, Gadus macrocephalus were investigated using left sagittal otoliths of 682 individuals collected in the West Sea of Korea from January to December 2007. The seasonal changes in the ratio of an opaque zone to interval between annular rings revealed that the narrow translucent parts of the otolith were annual growth rings formed between February and March once a year. The spawning period was December to January and therefore the duration from fertilization to the complete formation of the opaque zone became thirteen months. From the parameters calculated using the average length when the year ring was formed, the estimated von Bertalanffy growth equations were $L_t=100.0(1-e^{-0.1640(t+0.5247)})$ for females and $L_t=64.6(1-e^{-0.3335 (t+0.3342)})$ for males when is total length in age t.

• Journal of Korean Medical classics
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• v.22 no.3
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• pp.1-6
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• 2009

"Byeonjeungbang-yakjeongjeon(辨證方藥正傳)" was written in the year of 1946 by Lee Sanghwa(李常和) by adding on the original "Bang-yakhappyeon(方藥合編)". 850 formulas based on experience from the times of old and present were added to the original 588 of "Bang-yakhappyeon" and Kimsamul(金四物)'s Samultang(四物湯) modification[加減], Yun Chochang(尹草窓)'s Ijintang(二陳湯) and Pyeong-wisan(平胃散) modification, Idongwon(李東垣)'s Bojung-ikgitang(補中益氣湯) modification, and Pung(馮)'s Yukmijihwangtang(六味地黃湯) modification were added. The 60 medical texts that he consulted greatly influenced the formulas that were added, and of those books the ones of interest include "Seoksilbirok(石室秘錄)", "Byeonjeungrok(辨證錄)", "Byeonjeunggimun(辨證奇聞)" and "Bucheongjunamnyeogwa(傅靑主男女科)". If we analyze the 850 formulas of "Byeonjeungbang-yakjeongjeon", 290 of them, 34%, are related to Jinsatak(陣士鐸)'s medical texts, and of those 290, 15 are from "Seoksilbirok"(5%), 49 are from "Bucheongjunyeogwa"(17%), and 226 are from "Byeonjeungrok"(78%). So, the added formulas of Leesanghwa's "Byeonjeungbang-yakjeongjeon" have been greatly influenced by Jinsatak(陳士鐸), and by looking through Jin(陳)'s medical ideas one can find the origin of prescriptions and become more flexible.

• Journal of Species Research
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• v.7 no.1
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• pp.60-72
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• 2018

Our study aimed to discover indigenous prokaryotic species in Korea. A total of 29 bacterial species in the phylum Proteobacteria were isolated from freshwater and sediment of rivers and brackish zones in Korea. From the high 16S rRNA gene sequence similarity (${\geq}98.8%$) and formation of a robust phylogenetic clade with the closest species, it was determined that each strain belonged to an independent and predefined bacterial species. To our knowledge, there is no official report or publication that has previously described these 29 species in Korea. Specifically, we identified 10, 12, and seven species of eight, 12, and seven genera that belong to classes Alphaproteobacteria, Betaproteobacteria, and Gammaproteobacteria, respectively; all are reported as previously unrecorded bacterial species in Korea. The Gram reaction, colony and cell morphology, basic biochemical characteristics, isolation source, and strain IDs for each are also described.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.10 no.4
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• pp.237-246
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• 2012

In this study, numerical model for transport of radionuclide and colloid was developed. In order to solve reaction-migration governing equation for colloid and radionuclide, Strang-splitting Sequential Non-Iterative (SNI), which is one of Operator Splitting Method, was used for numerical method and this was coded by MATLAB. From the verification by comparing the simulation results with analytical solution considering only solute transport and rock diffusion, the Pearson's correlation coefficient was greater than 0.99 which demonstrates the accuracy of the model.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2005.05a
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• pp.81-86
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• 2005

As the optical communication is introduced to the backbone network at first and becomes a general communication method of network, the demand of kernel parts of optical communication such as PLC(Planar Light Circuit), Coupler, and WDM(Wavelength Division Multiplexing) element increases. The alignment and the attachment technology are very important in the fabrication of optical elements. In this paper, the driving mechanism of ultra precision stage is studied with the aim of optimal design of stage. The travel and the resolution of stage are investigated. The hysteresis of the stage is generated because of PZT actuator. The hysteresis and the inverse hysteresis are modeled in X, Y, and Z-axis motion. The input data of desired displacement to the stage according to input voltage is obtained from the inverse hysteresis equation. In the result of experiments with the input data, the errors due to hysteresis are well compensated.