플래쉬형 A/D 변환기를 위한 간단한 구조의 고속 비교기 설계

潘在景,方駿鎬,曺海豊 全北大學校 1992 論文集 Vol.34 No.-

A Flash A/D converter has many comparators for the high speed conversion operation, and its high performance can be achieved by the comparator with good characteristics. When the comparator is used in Flash A/D converter, the improved characteristics of the comparator are restrained by its size and power consumption. In this paper, a high speed CMOS comparator with simple architecture has been designed and simulated using a standard 1.5[㎛] processing parameter for the Flash A/D converter. The characteristics of the designed comparator are improved by using internal biasing circuits and the CMOS complementary gain stage. This comparator can be operated in a few nano second and have a small size achitecture.

로치오 알고리즘읠 이용한 자동분류에서 용어 가중치 기법

김판준 명지대학교문헌정보학회 2007 文獻情報學論集 Vol.- No.9

로치오 알고리즘에 기반한 문헌의 자동분류에서 여러 용어 가중치 기법들을 분류 성능 측별에서 검토하였다. 특히, 학습문헌에 부여된 범주 정보의 사용 여부에 따라 가중치 기법을 지도 기법과 비지도 기법으로 구분하고, 이들 가증치 기법의 성능을 비교 및 분석하였다. 그 결과, 범주 정보를 사용하는 지도 가증치 기법이 비지도 가증치 기법보다 상당히 늘은 성능 수준을 보였고, 지금까지 정보검색과 자동분류에서 많이 사용되어 온 tfidf 가중치와 비교하여도 대부분의 지도 가중치 기법이 더 좋은 성능을 나타내었다. 또한, 이들 가중치들의 조합에 의한 조합 가중치의 분류 성능 측면에서는 지도 가중치 간의 조합이 비지도와 지도 가중치의 조합보다 더 좋은 성능을 보였다. 한편, 두 종류의 조항 가중치를 성능 향상률 측면에서 비교한 결과에서는, 지도 가중치 간의 조합 가중치보다 비지도와 지도 가중치 간의 조합에서 더 큰 효과가 있는 것으로 나타났다.

Firewall 시스템 분석 및 Viruswall과의 통합(Integration) 방안에 관한 연구

최준호,김판구 조선대학교 전자정보통신연구소 2001 電子情報通信硏究所論文誌 Vol.4 No.1

Many kinds of viruses have been occurring in the computer systems. These are able to destroy some critical data and even make the computer system halt their function. Consequently, its damage was enormous. So we need a more efficient method that detects the computer viruses, different from the existing one. As first storage-second detecting method which is inspected by supervisor after storing in the file system can't confront actively the virus intrusion, we propose viruswall system which is able to play a role in warning and data blocking in this paper. In addition, we propose the method that integrates into viruswall system for virus detection and blocking in order to introduce firewall system for this system design.

WordNet상에서 유사성 측정을 이용한 개념 기반 이미지 검색

조미영,최준호,김판구 조선대학교 전자정보통신연구소 2003 電子情報通信硏究所論文誌 Vol.6 No.1

Semantic interpretation of image IS incomplete without some mechanism for understanding semantic content that is not directly visible For this reason, human assisted content-annotation through natural language is an attachment of textual description (ie a keyword, or a simple sentence) to image However, keyword-based retrieval is in the level of syntactic pattern matching In other words, dissimilarity computation among terms is usually done by using string matching not concept matching In this paper, we present a solution for qualitative measurement of concept-based retrieval of annotated image We propose a method for computerized conceptual similarity distance calculation in WordNet space. Also we have introduced method that applied similarity measurement on concept-based image retrieval When tested on a image set of Microsofts Design Gallery Live, proposed method outperforms other approach.

1999년도 전남 지역내 저소득층 주민암 검사 실시에 따른 암유병률 조사연구

선승철,박준영,장판기,이영춘,이은희 한국건강관리협회 2000 건협 Report Vol.3 No.-

비탈형 거푸집의 경제성 향상에 관한 연구

조규현,김제섭,전판근,김우재,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The purpose of this study is to improve the productivity and constructability of permanent forms. The permanent forms will cut down the cost of production and make easier to install in the field; hence increase the use of forms in the today's market. The permanent form is produced in the factory and built in field. So this study is in two parts. The one is the productivity in factory, the other is constructability in the field. This study is the designing a new mold system as a solution to existing mold system's problems.

노인소비자의 구매행태와 실버마케팅전략

박영근,김판준 昌原大學校 産業經濟硏究所 2002 産經硏究 Vol.19 No.-

단열양생을 이용한 고강도 콘크리트 압축강도 추정에 관한 실험적 연구

조규현,김제섭,전판근,백민수,김우재,정상진 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

The present study is a basic experiment on the estimation of the compressive strength of high strength concrete, aiming at estimating the compression strength of mass test pieces of high strength concrete by giving the temperature hysteresis of the mass test pieces to managerial test pieces. Different from ordinary concrete, high strength concrete generally shows the high rise of temperature caused by hydration heat inside the concrete. It is known that, in mass concrete, thermal stress occurs due to the difference in temperature between the inside and the outside, which causes a significant difference in compression strength between structure beams and managerial test pieces. It is also reported that there is a large difference between the compression strength of cylindrical managerial test pieces of standard underwater curing and the strength of structure beam concrete. Thus, this study made concrete test pieces in an optimal mix ratio for each strength level, and also created adiabatic curing tank and managerial test pieces. Then it carried out comparative analysis in relation to core strength and suggested equipment and a technique that can control the strength of high strength concrete mass more conveniently and accurately.

Identification and quantification of oleanane triterpenoid saponins and potential analgesic and anti-inflammatory activities from the roots and rhizomes of Panax stipuleanatus

Pan-Pan Shu,Lu-Xi Li,Qin-Min He,Jun Pan,Xiao-Lei Li,Min Zhu,Ye Yang,Yuan Qu 고려인삼학회 2021 Journal of Ginseng Research Vol.45 No.2

Background: Panax stipuleanatus represents a folk medicine for treatment of inflammation. However, lack of experimental data does not confirm its function. This article aims to investigate the analgesic and anti-inflammatory activities of triterpenoid saponins isolated from P. stipuleanatus. Methods: The chemical characterization of P. stipuleanatus allowed the identification and quantitation of two major compounds. Analgesic effects of triterpenoid saponins were evaluated in two models of thermal- and chemical-stimulated acute pain. Anti-inflammatory effects of triterpenoid saponins were also evaluated using four models of acetic acid-induced vascular permeability, xylene-induced ear edema, carrageenan-induced paw edema, and cotton pellet-induced granuloma in mice. Results: Two triterpenoid saponins of stipuleanosides R₁ (SP-R₁) and R₂ (SP-R₂) were isolated and identified from P. stipuleanatus. The results showed that SP-R₁ and SP-R₂ significantly increased the latency time to thermal pain in the hot plate test and reduced the writhing response in the acetic acid-induced writhing test. SP-R₁ and SP-R₂ caused a significant decrease in vascular permeability, ear edema, paw edema, and granuloma formation in inflammatory models. Further studies showed that the levels of inflammatory mediators, nitric oxide, malondialdehyde, tumor necrosis factor-α, and interleukin 6 in paw tissues were downregulated by SP-R₁ and SP-R₂. In addition, the rational harvest of three- to five-year-old P. stipuleanatus was preferable to obtain a higher level of triterpenoid saponins. SP-R₂ showed the highest content in P. stipuleanatus, which had potential as a chemical marker for quality control of P. stipuleanatus. Conclusion: This study provides important basic information about utilization of P. stipuleanatus resources for production of active triterpenoid saponins.

Orignal Paper : The Effect of Aronia, Montmorency, and Prunus mume supplementation on Blood Fatigue Factors and Muscle Damage Enzymes after Running 10 km

( Pan Jun Shin ),( Yeon Hui Kim ),( In Soo Lim ) 한국운동영양학회 2012 Journal of exercise nutrition & biochemistry Vol.16 No.1

The purpose of this study was to analyze the effects of intake of aronia, montmorency, and Prunus mume on 10 km endurance exercise by investigating changes in blood lactate, ammonia, creatine kinase (CK), and lactate dehydrogenase (LDH), and eventually to recommend them as ergogenic aids, which are effective for recovering from exercise fatigue and muscle damage. The subjects were divided into a P. mume intake group, an aronia intake group, a montmorency intake group, and a control group. Blood samples were taken from the brachial vein at rest, and at 0, 30 min, and 24 hr after running to measure recovery status. All data were analyzed by a two-way repeated-measures analysis of variance using SPSS. The results are summarized as follows: The changes in blood ammonia and LDH concentration following 10 km of running were not significantly different among the groups. However, lactate and CK recovery ratio increased significantly in the aronia and montmorency groups compared to those in the P. mume and control groups. In particular, CK concentration was significantly different in the montmorency group compared to that in the other groups. These results suggest that the effects of aronia and montmorency are associated with improved recovery from muscle fatigue and damage induced by highly intensive exercise, endurance exercise, or overtraining. In particular, montmorency is recommended as an ergogenic aid to inhibit muscle pain resulting from high-intensity endurance exercise.