• 한국초지조사료학회지
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• 제17권1호
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• pp.89-92
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• 1997

The aim of the research was to investigate the herbage yield and some characteristics of three triticale cultivars (Beaguelita, Eronga and Juanillo) harvested at the boot and milky-waxy ripeness stages in 1993-94 and 1994-95. A randomized complete block design with three replications was used. Although there were no significant differences between the years and the cultivars, significant differences were found between the harvest stages and for most of the parameters studied superiority was observed for the late cutting (at milky-waxy ripeness). The highest crude protein (11.9%) and crude ash (9.4%) contents were obtained h m the boot stage, whereas the highest yields for green matter, dry matter, crude protein and crude ash were obtained h m the milky-waxy ripeness stage (34.94; 11.65; O.% and 0.92t/ha, respectively). Also, the dry matter content was higher at the late cutting (33.4%).

• International Journal of Reliability and Applications
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• 제18권2호
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• pp.83-98
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• 2017

Stress-strength reliability problems arise frequently in applied statistics and related fields. In the context of reliability, the stress-strength model describes the life of a component, which has a random strength X and is subjected to random stress Y. The component fails at the instant that the stress applied to it exceeds the strength and the component will function satisfactorily whenever X > Y. The problem of estimation the reliability parameter in a stress-strength model R = P[Y < X], when X and Y are two independent two-parameter Lindley random variables is considered in this paper. The maximum likelihood estimator (MLE) and Bayes estimator of R are obtained. Also, different confidence intervals of R are obtained. Simulation study is performed to compare the different proposed estimation methods. Example in real data is used as practical application of the proposed procedure.

• 대한가정학회지
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• 제41권3호
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• pp.17-30
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• 2003

The purpose of this study was to explore the difference mother-child verbal interaction between wordless and narrative picture book. Forty-two 4-year-old middle class children(21 girls and 21 boys) and their mothers were observed in their home. Major findings were as follows: 1) Mothers' verbal interaction strategies shows difference according to the genre of the book. Mothers used more descriptive statement, descriptive questions, inferential statements, evaluative statements and elaborative feedback when sharing the wordless book than the narrative book. 2) Children differently interact when reading picture books of different genres. Children used more descriptive statements, inferential statements and elaborative feedback. 3) Compared with the narrative picture boot mother and child engaged in more turn-taking when reading the wordless picture book. 4) While the proportion of collaborative type was higher when reading the wordless boot the proportion of passive type was higher when the narrative book.

• 디지털산업정보학회논문지
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• 제17권4호
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• pp.77-83
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• 2021

As Open Source Software(OSS) recently invigorates, many companies actively use the OSSes in their business software. With such OSS invigoration, our web application is developed in order to provide the safety in using the OSSes, and update the information on the new vulnerabilities and the patches at all times by crawling the web pages of the relevant OSS home pages and the managing organizations of the vulnerabilities. By providing the updated information, our application helps the OSS users and developers to be aware of such security issues, and gives them to work in the safer environment from security risks. In addition, our application can be used as a security platform to greatly contribute to preventing potential security incidents not only for companies but also for individual developers.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2023년도 춘계학술발표대회
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• pp.763-764
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• 2023

조직 활동에 필수적인 조직 모집 관리를 위해 많은 조직들은 효과적인 모집 전략과 도구를 추구하고, 이러한 모집 프로세스에 많은 시간과 비용을 투자하고 있다. 이러한 모집 프로세스를 통합적으로 관리할 수 있는 웹 서비스를 구축하여, 조직 관리자와 지원자가 모집 및 지원 활동에 효율적으로 참여할 수 있도록 돕고자 한다.

• 한국항행학회논문지
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• 제21권1호
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• pp.78-83
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• 2017

유닉스의 영향을 받아 탄생한 리눅스는 커널을 제외하고는 대부분의 체계, 관련 프로그램 패키지, 명령어 등을 유닉스 계열에서 가져다가 사용하였다. 그러나 엔터프라이즈 리눅스의 최신 버전인 RHEL 7에서는 시스템 부팅 및 서비스 관리 프로그램으로 init 대신에 systemd를 채택하였다. systemd의 채택은 리눅스만의 독자적인 시스템 체제를 구축하는 것뿐만 아니라 특정 패키지 및 특정 명령어에 상당히 많은 기능을 부여했다는 점이 주목할 만하다. 유닉스의 아류로 인식되었던 리눅스가 클라우드 시대로 접어든 현 시점의 대세로 자리 잡게 되면서 독자적으로 다양한 변화를 시도하고 있는데, 이러한 변화의 시작이 systemd의 채택이라고 할 수 있다. 앞으로 리눅스가 유닉스의 굴레를 벗어나 어떠한 변화를 시도할지 주목할 필요가 있다.

• Asian-Australasian Journal of Animal Sciences
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• 제13권8호
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• pp.1109-1112
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• 2000

A field experiment was carried out to determine the effects of mechanical and chemical conditioning at mowing on field drying rate and quality of grass hay in 1996. Mower conditioner and/or chemical drying agent $(K_2CO_3)$ were used at different harvest stages (late boot, heading and bloom stages) for hastening hay-making. After field drying, square bales were made by hay baler, and the visual estimation and nutritive value of hay were evaluated after storing two months. In mower conditioning, the duration of field drying was shortened by 0.5 to 1 day compared with drying agent, and by 1 to 2 days compared with control. The drying matter loss of hay was reduced by late harvest and mechanical conditioning. The visual score (leafiness, green color, odor and softness), and acid detergent fiber (ADF), neutral detergent fiber (NDF), in vitro dry matter digestibllity (IVDMD), and relative feed value (RFV) of hay were improved with mechanical conditioning, but chemical alone had little effect on quality. The quality of hay harvested at bloom stage was much lower than that of hay harvested at late boot and heading stage. In conclusion, mower conditioning can enhance the field drying rate of grass hay, however the drying efficiency of chemical drying agent is very low. Also the effects of chemical/mechanical combined conditioning are very similar compared with mechanical conditioning alone. Harvesting at late boot to heading stage is recommended for the production of high quality hay.

• 대한기계학회논문집A
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• 제21권12호
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• pp.2121-2133
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• 1997

A finite element code is developed for 3-D self-contact problems, using continuum elements with a SRI(Selective Reduced Integration) scheme to prevent locking phenomenon by the incompressibility of rubber. Contact treatment is carried out in two ways : using the displacement constraints in case of rigid contact ; and imposing the same contact forces on two contact boundaries in case of self-contact. The finite element code developed is applied to the deformation analysis of C.V.joint boots which maintain lubrication conditions and protect the C.V.joint assembly from impact and dust. The boot accompanies large rotation depending on the rotation of the wheel axis and leading to the self-contact phenomena of the boot bellows. Since this contact phenomenon causes wear of the product and has great influence on the endurance life of the product, it is indispensable to carry out stress analysis of the rubber boots. In case of self-contact, various methods for determining contact forces have been suggested with an appropriate contact formulation. Especially, the types of penetration in self-contact are modularized to accelerate conputation with a contact algorithm.

• 한국정보통신학회논문지
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• 제26권1호
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• pp.134-139
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• 2022

최근 프로그래밍과 인공지능에 대한 관심이 지속적으로 높아지고 있으며 초등학교부터 필수 교육으로 소프트웨어 교육을 실시하고 있다. 효율적인 프로그래밍 교육을 위해서 기본적으로 학생과 교사에게 적합한 실습실 환경을 구축해야 하지만 노후 컴퓨터와 네트워크 장비 구축 미비 등으로 인한 성능 문제가 있으며 이러한 컴퓨터들의 교체를 통해 성능을 높이는 일은 단기간에 현실적으로 불가능하다. 따라서 본 논문에서는 프로그래밍 실습 환경에 대한 문제 해결을 위해 React와 Spring boot를 사용하여 웹 페이지 기반의 온라인 실습환경 및 알고리즘 경진대회 채점 시스템을 제안한다. 이를 통해 사양이 낮은 컴퓨터에서도 웹 브라우저만을 사용하여 프로그래밍 학습을 진행할 수 있을 것으로 사료된다. 또한 학습하고자 하는 언어와 관계없이 여러 가지 프로그래밍 언어를 학습할 수 있으므로 실습 환경 구축을 위해 시간적 비용을 줄일 수 있을 것으로 사료된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권9호
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• pp.3068-3086
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• 2022

Digital Forensics is gaining popularity in adjudication of criminal cases as use of electronic gadgets in committing crime has risen. Traditional approach to collecting digital evidence falls short when the disk is encrypted. Encryption keys are often stored in RAM when computer is running. An approach to acquire forensic data from RAM when the computer is shut down is proposed. The approach requires that the investigator immediately cools the RAM and transplant it into a host computer provisioned with a tool developed based on cold boot concept to acquire the RAM image. Observation of data obtained from the acquired image compared to the data loaded into memory shows the RAM chips exhibit some level of remanence which allows their content to persist after shutdown which is contrary to accepted knowledge that RAM loses its content immediately there is power cut. Results from experimental setups conducted with three different RAM chips labeled System A, B and C showed at a reduced temperature of -25C, the content suffered decay of 2.125% in 240 seconds, 0.975% in 120 seconds and 1.225% in 300 seconds respectively. Whereas at operating temperature of 25℃, there was decay of 82.33% in 60 seconds, 80.31% in 60 seconds and 95.27% in 120 seconds respectively. The content of RAM suffered significant decay within two minutes without power supply at operating temperature while at a reduced temperature less than 5% decay was observed. The findings show data can be recovered for forensic evidence even if the culprit shuts down the computer.