• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.2
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• pp.168-172
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• 2014

A new sustain driving method is proposed to improve luminous efficiency by the generation of the self-erasing discharge during a sustain period in AC plasma display panel. As one subfield time in the conventional AC PDP is divided into the reset, address, and sustain period. Among them, as the square sustain waveform is alternately applied to the X and Y electrodes on the front plate during the sustain period, the plasma discharge for displaying the image is continuously produced. Meanwhile, in the conventional driving method, the address waveform applied to the A electrode on the rear plate is only driving during an address period and grounded during a sustain period. In this experiment, the negative pulse is applied to the A electrode at the latter part of the sustain pulse for improving the luminous efficiency producing the self-erasing discharge during the sustain period. The negative pulse on the A electrode can change from the space to the wall charge and induce the additional discharge by the accumulated wall charge when the voltages of three electrodes are grounded. As a result, the luminous efficiency will be measured with changes in the voltage level of the A electrode and the new driving method can be improved to the luminous efficiency about 32 % compared with the conventional driving method.

• The Journal of the Korea Contents Association
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• v.19 no.5
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• pp.187-193
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• 2019

Key-value storage engines are an essential component of growing demand in many computing environments, including social networks, online e-commerce, and cloud services. Recent key-value storage engines offer many features such as transaction, versioning, and replication. In a key-value storage engine, transaction processing provides atomicity through Write-Ahead-Logging (WAL), and a synchronous commit method for transaction processing flushes log data before the transaction completes. According to our observation, flushing log data to persistent storage is a performance bottleneck for key-value storage engines due to the significant overhead of fsync() calls despite the various optimizations of existing systems. In this article, we propose a group synchronization method to improve the performance of the key-value storage engine. We also design and implement a transaction scheduling method to perform other transactions while the system processes fsync() calls. The proposed method is an efficient way to reduce the number of frequent fsync() calls in the synchronous commit while supporting the same level of transaction provided by the existing system. We implement our scheme on the WiredTiger storage engine and our experimental results show that the proposed system improves the performance of key-value workloads over existing systems.

• Korean Journal of Forensic Psychology
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• v.11 no.1
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• pp.1-20
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• 2020

Witnesses will be exposed to a variety of misinformation after the witnessing of the event and state at the scene of the investigation after the delay period. This study was conducted to promote correct recall reporting without being affected by factors that against correct recall. Self-Administered Interview(SAI) is known to obtain eyewitness accounts quickly and accurately. Therefore, we performed a SAI to see if it reported more information than the control group that did not perform the SAI. Also, it also performed that correct information was maintained without being affected by misinformation and delay. Eighty-eight participants were asked to perform SAI or game after showing a video of mock crime. Misinformation was presented in the first or second session to see if it affected recall. An analysis of responses from the final test conducted in the second session by participants showed that groups that conducted SAI after a four-week delay reported more correct information than control groups, while there was no difference between incorrect- and confabulation information. In particular, the timing of presenting misinformation did not affect the amount of recall. This suggests that conducting the SAI immediately after witnessing the event protects correct information even after four weeks. Finally, the significance and limitations of this study, and subsequent studies were discussed.

• 한국노년학
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• v.30 no.4
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• pp.1281-1292
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• 2010

This study was performed to identify older adults' self-reported difficulties in understanding and utilizing health information and their relationships with health status and to investigate the differences between age groups and among education levels. Data were collected from July 1 to August 31 in 2007 from older adults in senior centers located in Daegu, Kyungpook, and Busan area. A total of 103 subjects participated in the study. The level of understanding health information in older adults was 50 on average (possible score 15-75). The most difficult items to understand were patient educational materials, written information provided by health care providers, and medical forms. The lower level of difficulty in utilizing health information was associated with better physical and mental health status. There were differences in their self-reported difficulties between the young-old and the old-old as well as among different education levels. Health care providers may need to tailor educational materials and medical forms to the cognitive ability of older adults under the consideration of their age and education levels.

• Proceedings of the Korean Society of Food and Cookery Science Conference
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• 2003.10a
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• pp.98-98
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• 2003

본 연구는 대학생의 음주와 식생활 관련 지식 및 행동에 관한 실태를 조사 하고자 경산지역 남자 대학생 177명과 여자대학생 189명을 대상으로 설문지를 이용하여 실시하였다. 설문지 내용은 일반적인 사항과 건강, 음주량과 음주와 관련된 사항 그리고 식습관과 영양지식과 관련된 문항으로 나누어서 자가기입 방식으로 응하도록 하였다. 자료는 각 문항들에 대해서 빈도와 백분율로 표기 하였고 통계적 분석은 SAS Package Program을 이용하여 t-test와 x$^2$-test로 하였다. (중략)

• 대한예방의학회:학술대회논문집
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• 2005.10a
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• pp.301-301
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• 2005

• 월간낙농육우
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• v.37 no.8
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• pp.153-156
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• 2017

목장을 비울 수 없는 낙농가들에 있어서 헬퍼란 가뭄에 단비 같은 존재다. 심지어 '상중착유'라는 말이 있을 정도로 매일같이 착유를 해야 해서 마음 놓고 목장 밖으로 나오질 못하기 때문이다. 문제는 헬퍼를 구하기가 힘들다는 것. 이에 서울우유협동조합에서는 헬퍼를 3년 하면 조합원 기입 자격과 쿼터를 일부 주는 제도를 시행해 낙농을 꿈꾸는 사람들의 도전이 이어지고 있다. 행복가득목장의 이형근 대표도 2010년부터 4년간 경기 화성지역 헬퍼로 근무한 후 목장을 시작했으며, 올해 3년차에 접어들었다. 현재 착유우 9두 등 총 13두(쿼터 200kg, 서울우유)를 사육하고 있는 행복가득목장의 이형근 (34) 대표를 만나봤다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.333-334
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• 2018

교내 실습에 사용한 소모품은 그 내역을 실습일지에 수기로 작성해야하는 불편함이 있다. 또한 학기가 종료된 후 모든 소모품의 입고내역 및 사용내역은 소모품 수불 대장에 모두 기입 되어야 한다. 본 논문은 이러한 불필요하고 반복성 있는 문서화 작업을 효율적이고 편리하게 처리할 수 있는 시스템을 목표로 한다. 이 시스템은 Spring Framework 기반으로 개발되었다.

• Proceedings of the Korean Vacuum Society Conference
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• 2005.08a
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• pp.157-157
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• 2005

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05a
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• pp.269-272
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• 2003

그레이팅이라는 금속제품의 자동 설계 시스템인 GDS (Grating automatic Drawing System)는 기본 설계 도면(Plan Drawing)의 정보들을 바탕으로 여러 세부 도면들을 자동 생성하는 시스템이다. 그러나 GDS를 통해 자동 생성된 도면은 설계자들의 일반적인 치수기입 요령을 부분적으로 만족시키지 못하고 있으며 또 치수 표시간의 겹침 현상이 발생하여 설계자가 도면을 수정해야 하는 번거로움이 있었다. 본 논문은 이러한 문제점을 해결하기 위해, 설계 전문가들의 치수 표시법을 지식으로 하여 규칙 기반 전문가 시스템을 구성하였다.