• Smart Structures and Systems
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• 제32권4호
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• pp.253-266
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• 2023

The time-reversal method is employed to improve the ability of pipeline defect detection, and a new approach of identifying the pipeline defect depth is proposed in this research. When the L(0,2) mode ultrasonic guided wave excited through a lead zirconate titinate (PZT) transduce array propagates along the pipeline with a defect, it will interact with the defect and be partially converted to flexural F(n, m) modes and longitudinal L(0,1) mode. Using a receiving PZT array attached axisymmetrically around the pipeline, the L(0,2) reflection signal as well as the mode conversion signals at the defect are obtained. An appropriate rectangle window is used to intercept the L(0,2) reflection signal and the mode conversion signals from the obtained direct detection signals. The intercepted signals are time reversed and re-excited in the pipeline again, result in the guided wave energy focusing on the pipeline defect, the L(0,2) reflection and the L(0,1) mode conversion signals being enhanced to a higher level, especially for the small defect in the early crack stage. Besides the L(0,2) reflection signal, the L(0,1) mode conversion signal also contains useful pipeline defect information. It is possible to identify the pipeline defect depth by monitoring the variation trend of L(0,2) and L(0,1) reflection coefficients. The finite element method (FEM) simulation and experiment results are given in the paper, the enhancement of pipeline defect reflection signals by time-reversal method is obvious, and the way to identify pipeline defect depth is demonstrated to be effective.

• 로봇학회논문지
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• 제19권2호
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• pp.176-187
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• 2024

Recently, automated solutions using collaborative robots have been emerging in various industries. Their primary functions include Pick & Place, Peg in the Hole, fastening and assembly, welding, and more, which are being utilized and researched in various fields. The application of these robots varies depending on the characteristics of the grippers attached to the end of the collaborative robots. To grasp a variety of objects, a gripper with a high degree of freedom is required. In this paper, we propose a service automation system using a multi-degree-of-freedom gripper, collaborative robots, and vision sensors. Assuming various products are placed at a checkout counter, we use three cameras to recognize the objects, estimate their pose, and create grasping points for grasping. The grasping points are grasped by the multi-degree-of-freedom gripper, and experiments are conducted to recognize barcodes, a key task in service automation. To recognize objects, we used a CNN (Convolutional Neural Network) based algorithm and point cloud to estimate the object's 6D pose. Using the recognized object's 6d pose information, we create grasping points for the multi-degree-of-freedom gripper and perform re-grasping in a direction that facilitates barcode scanning. The experiment was conducted with four selected objects, progressing through identification, 6D pose estimation, and grasping, recording the success and failure of barcode recognition to prove the effectiveness of the proposed system.

• Parasites, Hosts and Diseases
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• 제62권1호
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• pp.98-116
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• 2024

Epigenetic writers including DNA and histone lysine methyltransferases (DNMT and HKMT, respectively) play an initiative role in the differentiation and development of eukaryotic organisms through the spatiotemporal regulation of functional gene expressions. However, the epigenetic mechanisms have long been suspected in helminth parasites lacking the major DNA methyltransferases DNMT1 and DNMT3a/3b. Very little information on the evolutionary status of the epigenetic tools and their role in regulating chromosomal genes is currently available in the parasitic trematodes. We previously suggested the probable role of a DNMT2-like protein (CsDNMT2) as a genuine epigenetic writer in a trematode parasite Clonorchis sinensis. Here, we analyzed the phylogeny of HKMT subfamily members in the liver fluke and other platyhelminth species. The platyhelminth genomes examined conserved genes for the most of SET domain-containing HKMT and Disruptor of Telomeric Silencing 1 subfamilies, while some genes were expanded specifically in certain platyhelminth genomes. Related to the high gene dosages for HKMT activities covering differential but somewhat overlapping substrate specificities, variously methylated histones were recognized throughout the tissues/organs of C. sinensis adults. The temporal expressions of genes involved in eggshell formation were gradually decreased to their lowest levels proportionally to aging, whereas those of some epigenetic tool genes were re-boosted in the later adult stages of the parasite. Furthermore, these expression levels were significantly affected by treatment with DNMT and HKMT inhibitors. Our data strongly suggest that methylated histones are potent epigenetic markers that modulate the spatiotemporal expressions of C. sinensis genes, especially those involved in sexual reproduction.

• Nuclear Engineering and Technology
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• 제56권3호
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• pp.880-885
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• 2024

For Safety Assisted Engineering works, real-time simulators have emerged as a mandatory tool among all the key actors involved in the nuclear industry (utilities, designers and safety authorities). EDF, Electricité de France, as the leading worldwide nuclear power plant operator, has a crucial need for efficient and updated simulation tools for training, operating and safety analysis support. This paper will present the work performed at EDF/DT to develop a new generation of engineering simulator to fulfil these tasks. The project is called SiRENE, which is the acronym of Re-hosted Engineering Simulator in French. The project has been economically challenging. Therefore, to benefit from existing tools and experience, the SiRENE project combines: - A part of the process issued from the operating fleet training full-scope simulator. - An improvement of the simulator prediction reliability with the integration of High-Fidelity models, used in Safety Analysis. These High-Fidelity models address Nuclear Steam Supply System code, with CATHARE thermal-hydraulics system code and neutronics, with COCCINELLE code. - And taking advantage of the last generation and improvements of instructor station. The intensive and challenging uses of the new SiRENE engineering simulator are also discussed. The SiRENE simulator has to address different topics such as verification and validation of operating procedures, identification of safety paths, tests of I&C developments or modifications, tests on hydraulics system components (pump, valve etc.), support studies for Probabilistic Safety Analysis (PSA). etc. It also emerges that SiRENE simulator is a valuable tool for self-training of the newcomers in EDF nuclear engineering centers. As a modifiable tool and thanks to a skillful team managing the SiRENE project, specific and adapted modifications can be taken into account very quickly, in order to provide the best answers for our users' specific issues. Finally, the SiRENE simulator, and the associated configurations, has been distributed among the different engineering centers at EDF (DT in Lyon, DIPDE in Marseille and CNEPE in Tours). This distribution highlights a strong synergy and complementarity of the different engineering institutes at EDF, working together for a safer and a more profitable operating fleet.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제13권1호
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• pp.3-14
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• 2002

아동에 가해지는 정신적 외상의 충격은 아동의 심리발달에 지울 수 없는 상처를 남김으로써 향후 심각한 정신장애를 일으키는 결정적 원인이 된다. 아동기 외상의 현상학적 특징과 외상에 관여하는 신경생물학적 기전을 살펴보았고, 아동기에 경험하는 외상이 인격의 발달에 미치는 영향과 그와 관련한 정신병리를 알아보았다. 외상에 노출된 아동은 공통적으로 자신이 경험한 공포사건을 시각적으로 재경험하거나 그 기억을 반복하며, 놀이나 행동을 통해서도 외상사건을 반복하려는 경향을 보인다. 일회의 충격적 사건에 노출된 아동은 사건에 대한 지나친 기억과 집착을 보이고 지각왜곡이 심한 반면 장기간 반복되는 외상을 경험하는 아동은 정신적 무감각과 자기최면, 해리, 분노의 경향이 두드러진다. 소아·청소년에서는 외상 후 퇴행이 보다 현저하고 시간감각의 왜곡이 더 심하게 나타나며 아동의 연령이 어릴수록 자율신경계의 반응성이 증가하는 경향을 보인다. 외상적 충격에 노출되면 뇌내에서 즉각적이고 방대한 신경전달물질의 방출이 있게되는데, 자율신경계, 면역계, 시상하부-뇌하수체-부신피질 축(hypothalamic-pituitary-adrenal axis)이 활성화된다. 외상시 internal opiate가 활발한 작용을 하면서 아동으로 하여금 외상에 반응하지 않도록 하고 외상에 대한 감정반응 자체를 봉쇄할 수 있도록 해준다. 아동기 외상의 경우 central noradrenergic system에 변화가 초래되어 카테콜아민에 대해 과민감한 비정상적 소견을 보이게 된다. 체내 순환되는 cortisol 수치는 감소하고, glucocorticoid 수용체 농도와 반응성이 증가한다. 외상 후 발견되는 기억력 장애는 해마의 구조적 변화와 관련이 있는 것으로 보고되고 있다. 아동기 외상은 자기(self)와 대상(object)에 대한 내적 표상(internal representation)이 지속적으로 분화 발전하는 발달과정에서 일어난다는 점에서 인격의 발달에 심각한 영향을 미치게 된다. 해리, 신체화, 자학성, 자기애 장애의 정신병리로 발전하면서 경계성 인격장애, 자기애성 인격장애, 다중인격장애 등을 초래하게 된다.

• 산경연구논집
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• 제10권9호
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• pp.25-36
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• 2019

Purpose - Consumers have memories of their past time that they have not experienced. So consumers want to experience the past time and get pleasure through historical contents such as movies or dramas. This is because the re-created the past time sets the identity of the consumers who live today, and in the process, it give consumers emotional comfort. Consumers do not remember and sympathize with all of their historical time. In general, consumers remember the time that their communities are proud of. As s result, historical content is seen as a hero, and through that, consumers can check their identity. Also consumers experience positive emotions such as self-esteem, gratitude and pride through identification with heroes. That is, through historical contents, consumers can identify themselves and replace the current negative emotions with positive ones. Therefore, this study presents narrative identity and historical nostalgia that can affect positive evaluation of historical contents and suggest the factors the can induce such effects. This study was conducted to explain what the consumption effect of historical content is from a marketing perspective and what constitutes a component of historical content as a factor driving this effect. Research design, data, and methodology - This study has developed a questionnaire with 8 Hypotheses. The Films ('Masquerade(2012)', 'Roaring Current(2014)', 'Assassination(2015)', 'The Age of Shadow(2016)') and dramas('Six Flying Dragon(2015-2016)', 'Mr. Sunshine(2018-2019)') were used as experimental contents. 268 college students participated in this empirical study, and structural equation model was used to verify hypotheses. Results - Frist, narrative identity affects positive evaluation of historical contents. Nostalgia affect positive evaluation of historical contents. and narrative identity affects positive response of historical nostalgia. Second, character act relevance, circumstance similarity, and character attractiveness have positive influence upon response of narrative identity. Lastly, empathy for story and vividness of representation have also positive influence upon response of historical nostalgia. Conclusion - This study contributes to the theoretical and managemental development of historical contents. This study shows that narrative identity and historical nostalgia are important for success of historical contents. In order for historical content to be successful, it must manage elements of character act relevance, circumstance similarity, and character attractiveness, empathy for story and vividness of representation.

• 만화애니메이션 연구
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• 통권42호
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• pp.241-262
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• 2016

영국 TV 채널인 채널 4는 세계적으로 가장 유명한 채널 중의 하나다. 그 채널 4의 스테이션 ID 역시, 스테이션 아이디를 포함한 모션 그래픽 발전에 선두적인 역할을 해왔다. 이 스테이션 아이디의 메인 디자인 컨셉은 이 채널의 이름이자 동시에 상징적인 채널 4의 로고 '4'이다. 채널 4 에서 처음으로 컴퓨터로 제작된 스테이션 아이디에는 모듈라 타이포그래피가 사용되었다. 모듈라 타이포그래피는 글자를 비슷한 형태로 만들어내는 서체 디자인 기술인데, 채널 4의 스테이션 아이디는 컬러풀한 다각형으로 구성되어있다. 이 다각형들은 흩어졌다가 같은 3디 초점으로 모여든다. 또한 채널 4 스테이션 아이디의 모듈 방식은 비슷한 다각형들로 증명된다. 첫 번째 스테이션 ID 이후, 채널 4는 브랜화되었다. 특히 2004년부터 2011년 사이의 채널 4 스테이션 아이디에서 채널 4의 모듈 타이포그래피 특징들이 많이 보인다. 아이콘 '4'는 돌, 건물, 빛 등의 자연적 환경과 인위적 환경으로부터 소재를 갖고 온다. 이 논문에서는 채널 4의 역사, 첫 번째 스테이션 아이디와 그 이후 채널 4의 스테이션 아이디들에 적용된 모듈방식에 대한 시각적인 묘사가 포함되어 있다.

• 한국콘텐츠학회논문지
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• 제18권10호
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• pp.247-256
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• 2018

본 연구는 세속 직업에 종사하다가 대학생 선교단체 간사로 경력을 전환한 대학생 선교단체 간사의 경력전환 과정과 경험을 탐색하는 것을 목적으로 한다. 연구목적을 달성하기 위하여 한국대학생선교회(CCC)에 소속되어 있는 시니어간사 5명을 인터뷰하여 분석하였다. 주요 연구결과는 다음과 같다. 첫째, 대학생 기독선교회 시니어 간사의 경력전환 동기는 소명의식과 유관함을 알 수 있다. 둘째, 경력전환 과정에서 새로운 환경에 대한 적응과 주위로 부터의 격려와 지지를 경험하는 것으로 나타났다. 셋째, 간사의 경력전환의 의미는 하고자 했던 일을 다시 찾게 됨과 약속지킴, 특별하고 영광스러운 삶인 것으로 나타났다. 이상의 연구결과를 토대로 다음과 같은 결론을 얻었다. 첫째, 선교단체 간사의 소명실행은 소명확인의 단계가 필수적임을 확인할 수 있었다. 둘째, 선교단체 간사의 소명실행은 주위 지지자들이 있을 때 더욱 지속됨을 알 수 있었다. 셋째, 선교단체 간사의 경력전환경험이 갖는 의미는 소명을 따라가는 삶에 있음을 알 수 있었다.

• 지역사회간호학회지
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• 제18권1호
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• pp.165-176
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• 2007

Purpose: The purpose of this study was to investigate the needs of home care nursing services in relation to the patients in hospital. Method: Subjects were 129 patients who admitted hospital and were selected through convenience sampling. Data were collected using the Home Health Care Need Assessment Questionnaire constructed by the Korea Health Industry Development Institute. Data were analyzed using SAS 8.12 program by applying percentage. Results: 1. According to the diagnosis of the subjects, the majority had cancer (25.0%), followed by musculoskeletal disease (15,6%), neuro/cerebral vascular disease (14.1%), digestive (10.9%) and respiratory disease (10.9%). 2. With regard to fundamental nursing service, subjects wanted to receive home care services for the following reasons: Problem identification and diagnosis (77.5%), vital sign check (49.6%); and intake and output measure (20.9%). 3. With regard to clinical laboratory tests, 62.8% wanted to receive blood tests, and followed by urine tests 26.4%, and wound drainage 26.4%. 4. With regard to medication and treatment service, 40.3% of the subjects wanted to receive intravenous fluid therapy, 26.4% intravenous antibiotics, and 26.4% the monitoring of fluid therapy. 5. With regard to therapeutic nursing service, 33.3% wanted to receive wound care, 26.4% ROM exercise, and 27.9% foley catheter change and care. 6. With regard to educational needs, 42.6% wanted education on infection monitoring, 41.4% on medication, and 34.9% on diet. 7. With regard to counseling needs, 65.9% wanted to receive telephone counseling about patient condition, 52.7% counseling about re-admission and 51.9% direct counseling about patient condition. In the group of injury and toxicity, and cardiovascular/circulatory diseases, 100% wanted telephone and direct counseling about the patient condition. Conclusion: Therefore, in order to improve the quality of hospital based home health care services, various factors that affect to the need of home health care should be analyzed and specified nursing care should be looked into.

• 한국버섯학회지
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• 제2권2호
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• pp.49-59
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• 2004

영지속 (Ganoderma) 수집 균주의 유연관계를 밝히고자 균사체 생장, 후막포자 형성여부, 온도별 균사 생장, 자실체의 형태를 조사하였다. 영지의 균사생장은 115개 균주 중 68개 균주가 GCM에서 가장 양호하였으며, 균사생장은 균주간에 많은 변이가 있었다. 수집균주는 균총의 형태에 따라 28개 group으로 구분되었는데 대부분 CM3와 CM8 group에 속하였다. 이들 균사체를 현미경으로 관찰한 결과 후막포자를 형성한 균주는 G. lucidum ASI 7022 등 16균주였으며, 국내에서 수집된 대부분의 G. lucidum 균주들은 후막포자를 형성하지 않았다. 한편 이들은 온도별 균사생장 시험에서도 $35^{\circ}C$ 고온에서 상대적으로 균사생장이 저조하였는데 미국에서 도입된 G. lucidum과 다른 특성을 보이고 G. tsugae와 유사한 특성이었다. 영지 115개 균주 중 톱밥배지에서 자실체가 발생한 균주는 97개 균주였고 형태는 편각형이 89.7%, 녹각형이 10.3% 였으며, 이러한 형태는 $CO_2$의 농도에 따라 변이가 있었다. 본 실험 결과 국내에서 수집된 G. lucidum 균주는 분류를 재검토하여야 할 것으로 사료되었다.