• 대한한의학원전학회지
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• 제31권1호
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• pp.79-93
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• 2018

Objectives : The climate changes in the natural realm displays pheonomena of excess and deficiency due to the principle of Yiyinyiyangzhiweidao. Here, overabundant qi arises due to the works of multiplication and insultation. When this overabundant qi is in force, the retaliating qi appears without fail to create a parallel. This is the Autonomous Equilibrium Mechanism found in the natural world. Studying this mechanism is deeply significant in understanding the mechanisms of diseases. Methods : The paper is written by reviewing the texts found in Huangdineijing's Chapters of Yunqi, which are $Q{\grave{i}}jiaobiandalun$, Wuchangzhengdalun, $Liuyuanzhengj{\grave{i}}dalun$, Zhizhenyaodalun, and Suwenliuqixuanzhumiyu. Results & Conclusions : The overabundance and retaliation in Five Circuits take the form of the restrained child of the Five Circuits takes revenge on the overabundant qi on behalf of his mother. The overabundance and retaliation in Six Qi take the form of rapid healing of Benqi which was in stagnation. Traditionally, overabundant qi is the only one in existence when the Five Circuits are in excess and the year of Hai yin wu wei you xu's regular transformation. During this time, retaliating qi does not exist. When Five Circuits are in deficiency and in the year of Si shen zi chou mao chen's pattern transformation, both the overabundant and deficiency qis exist. However, regardless of regular transformation or pattern transformation, overabundant qi and retaliating qi cannot exist at the same time. This seems to be the rational conclusion. There are some regulations that overabundance and retaliation follow. First, the strong and weak, and number of days coincide. Second, overabundance qi appear during the first half of the period when the qi of controling heaven is in place. During the later half of the period when the qi of terrestrial effect is in force, retaliation qi is the one that appears. Third, overabundance and retaliation does not end with one time. Rather, they will continue to repeat appearance and disappearance without any set pattern. Fourth, the overabundance and retaliation of the guest qi and dominant qi only has overabundance and no retaliation.

• 전기전자학회논문지
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• 제2권2호
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• pp.185-193
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• 1998

프랙탈을 기반으로 한 칼라 영상 부호화는 영상을 RGB, YIQ 나 $YC_bC_r$, 과 같은 기본적인 채널로 분리한 후, 각각의 채널을 독립적으로 프랙탈 이진 영상 부호화 기법에 적용함으로써 쉽게 부호화할 수 있다. 그러나 이 방법은 각각의 채널에 대해 부호화를 반복해야 하기 때문에 부호화 시간이 길어진다는 단점이 있다. 본 논문에서는 프랙탈 이론을 바탕으로 압축률의 향상과 부호화 시간의 단축을 동시에 이룰 수 있는 칼라 정지영상의 부호화를 위한 프랙탈 기반 부호기를 제안하였다. 제안된 알고리즘을 칼라영상에 적용하여 실험한 결과, 복원 영상의 PSNR 값이 평균적으로 $28{\sim}29[dB]$ 정도에서, 압축률이 JPEG에서 사용하는 무손실 부호화 과정을 거치지 않고도 약 28 : 1 이상으로 향상되었으며, 부호화 시간은 약 11.5 % 정도 단축할 수 있었다.

• 대한전자공학회논문지TC
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• 제46권10호
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• pp.52-56
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• 2009

본 논문에서는 WCDMA LCR-TDD 시스템에서 ARQ 방식을 적용한 하향 링크 TSTD (Time Switched Transmit Diversity)에서 전력 램핑이 적용된 경우의 성능을 계산한다. 제안된 전력 램핑 방식은 ARQ 방식을 적용한 TSTD에서 수신측이 에러체크를 수행한 후 송신측으로 응답신호 (ACK or NACK 신호)를 전송하고 전송된 응답신호가 NACK 신호인 경우 전력을 램핑하여 해당 에러 프레임을 재전송한다. 시뮬레이션 결과는 3km/h의 이동국 속도에서 프레임 오류 확률 (Frame Error Rate)이 1%일 때 제안된 방법이 기존의 ARQ방식을 적용한 TSTD보다 약 0.7dB의 평균 Eb/N0의 성능이득이 있으며, 평균 Eb/N0가 0dB일 때 약 2.5%의 수율 개선이 있음을 보여준다.

• 대한전자공학회논문지TC
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• 제47권12호
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• pp.61-68
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• 2010

본 논문에서는 WCDMA LCR-TDD 시스템에서 멀티레벨 제어 신호 방식을 적용한 하향 링크 ARQ-TSTD (ARQ-aided Time Switched Transmit Diversity)의 성능을 계산한다. 제안된 ARQ-TSTD는 멀티레벨 제어 선호 방식을 적용하여 수신측이 에러체크를 수행한 후 송신측으로 기존의 응답신호 (ACK or NACK or 신호) 이외에 NACK2 선호를 정의하고 이를 피드백한다. 송신측은 NACK2 신호를 본 논문에서 제안한 전송지연과 다중사용자 스케줄링 방식을 적용하는데 활용한다. 시뮬레이션 결과는 3km/h의 이동국 속도에서 프레임 오류 확률 (Frame Error Rate)이 10%일 때 5개 서브프레임 전송지연 방식, 2명의 사용자 스케줄링 방식이 각각 약 1.3dB, 약1.4dB의 성능향상이 있었다. 그리고 Eb/N0=-3dB에서 각각 약 14% 11.5%의 수율 성능 이득이 있었다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 통신소사이어티 추계학술대회논문집
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• pp.302-305
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• 2003

3GPP RLC protocol specification adopted an error control scheme based on selective repeat ARQ. In the 3GPP ARQ, distinctive windows are provided at transmitting and receiving stations so that those stations are prohibited to send or receive data PDU's out of window. An increase in window size enhances delay performance. Such an increase, however, raises the occupancy at re-ordering buffer, which results in a long re-ordering time. Aiming at suppressing the occupancy at re-ordering buffer, we propose partial go back N scheme in this paper In the partial go back N scheme, the receiving station regards all data PDU's between the first (lowest sequence numbered) error-detected PDU and last (highest sequence numbered) error-detected PDU. By the employment of the partial go back N scheme, the occupancy at the re-ordering buffer is apparently reduced, while the delay and throughput performance may be degraded due to the remaining properties of go back N. We thus consider peak occupancy of re-ordering buffer, mean sojourn time at re-ordering buffer, mean delay time, and maximum throughput as measures to evaluate tile proposed scheme and investigate such performance by using a simulation method. From numerical examples, we observe a trade-off among performance measures and conclude that the partial go back N scheme is able to effectively reduce the occupancy of re-ordering buffer.

• 한국추진공학회지
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• 제18권6호
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• pp.42-49
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• 2014

가상엔진 시뮬레이터를 이용한 시험장치는 실제 엔진을 이용한 시험과 유사한 시험 수행을 통하여 엔진 시험 횟수를 줄이고 동일한 조건에서 반복 시험이 가능하므로 엔진 정비 및 운용비용을 감소시켜 준다. 그리고 실제 시험에서 수행하기 어려운 극한 상황을 쉽게 구현할 수 있기 때문에 실제 엔진 시험 시 발생할 수 있는 엔진 손상 및 위험한 시험을 대체해 준다. 본 연구에서는 사전 연구를 통해 개발하였던 소형제트엔진 성능시험장치에 실시간 엔진 모델을 적용하여 실제 엔진 시험과 가상 엔진 시험을 다목적으로 수행할 수 있는 업그레이드 된 소형제트엔진 성능시험장치를 개발하였다. 새로 개발된 다목적 소형 제트엔진 성능시험장치는 교육용 및 연구용으로 더욱 다양하게 활용될 수 있을 것으로 기대된다.

• Molecules and Cells
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• 제44권9호
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• pp.627-636
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• 2021

The three-dimensional organization of chromatin and its time-dependent changes greatly affect virtually every cellular function, especially DNA replication, genome maintenance, transcription regulation, and cell differentiation. Sequencing-based techniques such as ChIP-seq, ATAC-seq, and Hi-C provide abundant information on how genomic elements are coupled with regulatory proteins and functionally organized into hierarchical domains through their interactions. However, visualizing the time-dependent changes of such organization in individual cells remains challenging. Recent developments of CRISPR systems for site-specific fluorescent labeling of genomic loci have provided promising strategies for visualizing chromatin dynamics in live cells. However, there are several limiting factors, including background signals, off-target binding of CRISPR, and rapid photobleaching of the fluorophores, requiring a large number of target-bound CRISPR complexes to reliably distinguish the target-specific foci from the background. Various modifications have been engineered into the CRISPR system to enhance the signal-to-background ratio and signal longevity to detect target foci more reliably and efficiently, and to reduce the required target size. In this review, we comprehensively compare the performances of recently developed CRISPR designs for improved visualization of genomic loci in terms of the reliability of target detection, the ability to detect small repeat loci, and the allowed time of live tracking. Longer observation of genomic loci allows the detailed identification of the dynamic characteristics of chromatin. The diffusion properties of chromatin found in recent studies are reviewed, which provide suggestions for the underlying biological processes.

• 한국전산구조공학회논문집
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• 제36권1호
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• pp.39-48
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• 2023

철도교량의 설계는 장기간에 걸쳐 수행되고 대규모의 부지를 대상으로 하기 때문에 다양한 환경적인 요인과 불확실성을 동반하게 된다. 이러한 연유로 초기 설계단계에서 충분히 검토하였더라도 설계변경이 종종 발생하고 있다. 특히 철도교량과 같은 대규모 시설물의 설계변경은 많은 시간과 인력을 소모하며, 매번 모든 절차를 반복하는 것은 매우 비효율적이다. 본 연구에서는 딥러닝 알고리즘 중 전이학습을 통해 설계변경 전의 학습 결과를 활용하여 설계변경 후의 학습의 효율성을 향상시킬 수 있는 기법을 제안하였다. 분석을 위해 기개발한 철도교량 딥러닝 기반 예측 시스템을 활용하여 시나리오들을 작성하고 데이터베이스를 구축하였다. 제안된 기법은 설계변경 전 기존 도메인에서 학습에 사용한 8,000개의 학습데이터 대비 새로운 도메인에서 1,000개의 데이터만을 학습하여 유사한 정확도를 나타내었고 보다 빠른 수렴속도를 가지는 것을 확인하였다.

• 보건의료산업학회지
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• 제8권3호
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• pp.181-192
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• 2014

The purpose of this study was to evaluate the effect of a sex education program on the aged's sex perception and the life satisfaction. It was the non-equivalent control group pre-post test design, the number of subjects was 65 people as the experimental group and 70 people as the control group over 65 the aged. The program was conducted for 80 minutes a time for 6times of the N settlement house in P city from August 25 to September 16 in 2011. The study tool which was developed by Lee(1999) and revised by Jeong(2007), was used to measure the sex perception. The life satisfaction was measured by Naugarten(1961) and modified by Kim(2002). The date were analyzed as SPSS Win 17.0, the percentage, t-test, and the hypothesis was analyzed as t-test. The experimental group got higher scores on the sexual percetion(t=3.816, p<.001) and the life satisfaction(t=4.594, p<.001). This program is for generalized that must be performed in a repeat and comprehensive study with the many aged.

• 지식경영연구
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• 제12권4호
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• pp.121-132
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• 2011

Failure, the research object, means situations when goals and their results are different, which has developed presenting various aspects from ancient times and modern times. Failure is a complex concept which essentially requires judgement, and also a relative concept which can be changed depending on how you set up time base and standard. There are four stages for failure study to have been developed from studying failure through historical facts to the approach of organizational theory and it has been studied by looking at the failure of an organization according to different categories such as a developmental stage, a type of business, a period and a course. Compared with success science, failure study has not been studied sufficiently and also the level of its analysis is low. Thus, since lessons of failure tend to repeat themselves instead of being didactically accumulated, there need more studies on this. This thesis identified the main cause of the failure through various studies regarding failure which have been conducted at home and abroad. What the main cause of the failure that more than three studies mentioned have in common was that it occurred because organizations concentrated on the inside without communicating with external environment. The key point of failure study is to analyze failure, utilize it as assets, and create a frame of failure management. This thesis focused on delivering fragmentary knowledge on failure study, but case studies regarding this subject should be done in the future.