• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.525-527
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• 2000

본 논문에서는 최근 객체지향 설계에 많이 사용되고 있는 UML 다이아그램들의 일관성과 완전성을 해결하기 위하여 UML 의 각 다이아그램을 ER 모델로 표현하고, 각 다이아 그램에 대한 공통된 표현으로 통합된 ER 다이아그램을 제공하며 일련의 집합과 함수들을 사용하여 정형적으로 명세한 다음 이러한 정형 명세를 기반으로하여 일관성을 완전성 검사를 수행하기 위한 규칙을 제공한다. 이 규칙은 다이아그램의 구문(syntax)과 의미(semantic)에 대하여 모두 검사할 수 있게 하기 위하여 구문 완전성, 구문 일관성, 의미 완전성, 의미 일관성으로 나누어 생성한다. 이렇게 생성된 규칙들은 추후 CASE 도구에 포함되어 다이아그래밍의 일관성 및 완전성을 검사할 수 있는 CASE 도구로 발전할 수 있게 된다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.51 no.7
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• pp.639-644
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• 2006

This study was performed to compare the differences in physicochemical characteristics between head and incomplete kernels separated from Ilpumbyeo, Korean rice cultivar. The contents of mineral and protein were higher in incomplete than head kernels. There was significant difference in composition of fatty acid and amino acids, which affect the taste, between two kernels. The gelatinized head kernel had the higher viscosity than incomplete kernel. The content and chain length of amylose were higher in head than incomplete kernels. Differential scanning calorimeter results revealed that head kernel had lower starting temperature, higher maximum temperature, and higher enthalpy for gelatinization than incomplete kernel. Also we could found that the hydrolysis rate by glucoamylase was higher in the head kernel than incomplete kernel.

• The KIPS Transactions:PartC
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• v.17C no.2
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• pp.159-164
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• 2010

The data wiping is a technique which perfectly deletes data in a storage to prevent data recovery. Currently, management of stored data is important because of increasing an accident of personal information leakage. Especially, if you need to discard data contained personal information, using a wiping tool which permanently deletes data to prevent unnecessary personal information leakage. The data wiping is also used for data security and privacy protection. However the data wiping can be used intentionally destruction of evidence. This intentionally destruction of evidence is important clues of forensic investigation. This paper demonstrates the methods for detecting the usage of wiping tools in digital forensic investigation.

• Journal of radiological science and technology
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• v.25 no.2
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• pp.65-70
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• 2002

The pain of chronic pancreatitis associated intraductal stones is related to increased intraductal pressure. Decom-pression of the pancreatic duct along with extraction of stones are the goals of a combined endoscopic-extracorporeal shock wave lithotripsy approach. The aim of this study is to define radiographic prognostic criteria for better complete free rate of pancreatic head and body ductal stones for extracorporeal shock wave lithotripsy. Fifty-nine patients with chronic pancreatitis were treated by extracorporeal shock wave lithotripsy for endoscopically unretrievable stones. The stones on endoscopic retrograde pancreatograms were classified into four characteristics including number, size of longest diameter, density compared with vertebral body, and shape. Complete stone free were obtained in 45 of 59(76.3%). Pancreatic ductal stones with radiographic characteristics including higher density than vertebral body, square shape, and rim calcified stones were hindrance factors for extracorporeal shock wave lithotripsy. We propose that patients with rim calcified stone of our three hindrance factors should be treated by other technique.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10b
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• pp.392-394
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• 2000

본 논문에서는 DNA칩 이미지 처리시스템을 위한 완전 그리딩 알고리즘을 제안한다. DNA칩 이미지를 분석하여 처리할 수 있는 많은 DNA칩 분석 시스템이 있다. 하지만 이전의 시스템들은 정확한 이미지 처리를 통한 올바른 유전자 발현정보를 얻기 위해서 많은 사용자의 개입이 필요한 단점이 있었다. 본 논문에서는 사용자의 개입이 없는 정확한 자동 이미지 처리를 위해서, $\varepsilon$-그래프 모델링 기법을 제시하고, MBR, Mass, Geometry 등 세가지 종류의 반점(spot) 중심을 이용한 완전 그리딩 알고리즘을 제안한다. 제시된 이미지 처리 기술은 완전한 자동 DNA칩 분석 시스템으로, 사용자의 개입없이도 정확한 DNA칩 위치 정보를 얻을 수 있다.

• The Journal of the Korea Contents Association
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• v.18 no.5
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• pp.230-240
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• 2018

The objective of this study is to observe the exclusive breastfeeding(EBF) rate and to identify factors which influence EBF by postpartum period. The data were obtained from the 2015 National Fertility Survey, Family Health and Welfare in Korea, and secondary data analysis were employed for 1,839 mothers who gave birth to baby between January 2013 and February 2015. Data were analyzed using SPSS 25.0 program with descriptive statistics, chi-square test and multiple logistic regression. The EBF rate at the 1st and 6th month of postpartum were 54.0%, 9.4% respectively. The significant influencing factors on the EBF at the 1st month of postpartum were age of mother, baby's birth rank, type of delivery, breastfeeding within 1 hour after delivery. The significant influencing factors on the EBF at the 6th month of postpartum were age of mother, living area, EBF in the first month. We found that the influencing factors on EBF differed by postpartum period. In order to improving the rate of EBF, it is recommended that taioed interventions is needed considering the factors affecting the EBF by postpartum period.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.50 no.spc1
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• pp.85-87
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• 2005

This study was conducted to identify the effective dyainage-time influencing rice yield and grain quality on a reclaimed saline soil, the experiment conducted at the Gyehwado substation of the Honam Agricultural Research Institute from 2002 to 2003. The experimental field contained $0.1\%\;and\;0.3\~0.4\%$ NaCl in soil solution, respectively. The experiment involved salinity levels as main plot and sub-plot where consisted of 6 treatments in a split plot design with three replicates. Rice yield performance showed a maximum at drainage-time for 35 days after flowering under medium salinity level, but indicated only $64\%$ of yield level compare to low soil salinity. Percentage of well-shaped rice was high in low soil salinity indicating there aye severe affection for grain quality in medium soil salinity regardless water drainage-time.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.21 no.12
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• pp.1401-1411
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• 2010

In this paper, we suggested the tolerance limits of FAR(Fully Anechoic Room) using correlation factor between OATS(Open area Test Site) to measure EMI(Electromagnetic Interference) and FAR to measure EMS(Electromagnetic Susceptibility). FAR Project(SMT4-CT96-2133), CISPR/A/665/DTR, and CISPR A/665/DTR documents are analyzed and theoretical correlation factor based on the documents and theoretical equations is drawn. To obtain the experimental correlation factor, EUT(Equipment Under Test) is fabricated as well as measured at the 10 m distance OATS and in the 3 m distance FAR. Also, to suggest the tolerance limits of EUT with multi sources, radiation theory for electric and magnetic dipoles is programmed. We drew the correlation factor for EUT with multi sources through the programs. As the tolerance limits of FAR is newly defined, It can be used alternative test site for OATS to measure EMI, efficiently.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.5
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• pp.1141-1149
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• 2016

Deduplicated filesystem can reduce usage of storage. However, it be able to recover deleted block. We studied sanitization of deduplicated filesystem, LessFS which is based on FUSE(Filesystem in USErspace). First, we show a vulnerability recover deleted data in the deduplicated filesystem. We implement sanitization of deduplicated filesystem considering the part of fingerprint DB with data blocks. It takes 60~70 times compared to without sanitization. Which means access time to fingerprint DB and overhead derived from increase of number of chunk have a critical impact on sanitization time. But in case of more than 65,536 Byte of chunksize, it is faster than normal filesystem without deduplication.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.2
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• pp.185-191
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• 2023

To the exact cover problem that remains NP-complete to which no polynomial time algorithm is made available, this paper proposes a linear time algorithm that yields an optimal solution. The proposed algorithm makes use of the set cover problem's major feature which states that "no identical element shall be included in more than one covering set". To satisfy this criterion, the proposed algorithm initially selects a subset with the minimum cardinality and deletes those that contain the cardinality identical to that of the selected subset. This process is repeatedly performed on remaining subsets until the final solution is obtained. Provided that the solution is unattainable, it selects subsets with the maximum cardinality and repeats the same process. The proposed algorithm has not only obtained the optimal solution with ease but also proved its wide applicability on N-queens problems, hence disproving the NP-completeness of the exact cover problem.