• Molecules and Cells
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• 제44권8호
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• pp.549-556
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• 2021

Decoding the molecular mechanisms underlying axon guidance is key to precise understanding of how complex neural circuits form during neural development. Although substantial progress has been made over the last three decades in identifying numerous axon guidance molecules and their functional roles, little is known about how these guidance molecules collaborate to steer growth cones to their correct targets. Recent studies in Drosophila point to the importance of the combinatorial action of guidance molecules, and further show that selective fasciculation and defasciculation at specific choice points serve as a fundamental strategy for motor axon guidance. Here, I discuss how attractive and repulsive guidance cues cooperate to ensure the recognition of specific choice points that are inextricably linked to selective fasciculation and defasciculation, and correct pathfinding decision-making.

• 센서학회지
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• 제31권6호
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• pp.389-396
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• 2022

Quartz crystal microbalance (QCM) based sensors are used for various applications owing to advantages such as excellent accuracy and precision, rapid response, and tiny footprint. Traditional applications of QCM-based sensors include biological sensing and thin-film thickness monitoring. Recently, QCMs have been used as functional material for novel physical and chemical detections, and with improved device design. QCM-based sensors are garnering considerable attention in particulate matter sensing and electric nose application. This review covers the challenges and solutions in physical, chemical, and biological sensing applications. First, various physical sensing applications are introduced. Secondly, the toxic gas and chemical detection studies are outlined, focusing on introducing a coating method for uniform sensing film and sensing materials for a minimal damping effect. Lastly, the biological and medical sensing applications, which use the monomolecularly decorating method for biomolecule recognition and a brief description of the overall measuring system, are also discussed.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2023년도 추계학술발표대회
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• pp.506-508
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• 2023

비접촉 음파 센서와 기계학습을 결합하여 도로 표면의 투명한 블랙아이스 감지 및 노면 분류 97%의 정확도를 달성한 새로운 접근 방법을 제안한다. 개발된 시스템은 블랙아이스를 포함한 다양한 물질의 반사 특성을 분석하여 미끄러운 도로 상황을 실시간 감지 및 예측이 가능하여 도로 안정성을 향상한다. 본 연구에서는 테스트 벤치와 투명하고 미끄러운 물질을 이용하여 블랙아이스를 감지할 수 있는 기술의 정확도를 비교하며, 실험 결과를 통해 제안된 블랙아이스 감지 방법의 타당성을 입증하고자 한다.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제27권2호
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• pp.195-210
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• 2024

Researchers and curricula continue to call for proof to serve a central role in learning of mathematics throughout kindergarten to grade 12 and beyond. Despite its prominence and recognition gained during past decades, proof is still a stumbling block for both teachers and students. Research efforts have been made to address issues related to teaching and learning of proof. An area in which such research efforts have been made is analysis of curriculum material (i.e. textbook analysis) with a focus on proof. This study is another research effort in this area of research through investigating the guidance offered in curriculum materials with the following research question: What is the nature (e.g., kinds of content knowledge, pedagogical content knowledge) of guidance is offered for teachers to implement proof tasks in grade 8 geometry textbooks? Results indicate that the guidance offered for proof tasks are concerned more with content knowledge about the content-specific instructional goals than with pedagogical content knowledge which supports teachers in preparing in-class interactions with students to teach proof.

• 한국중재학회지:중재연구
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• 제30권2호
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• pp.43-68
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• 2020

The "arbitration" system resolves disputes through judgments on rights relations or claims between disputed parties by judging by private trial, but it does not have organizational and material bases to execute the contents of these judgments. Therefore, unless the parties succeed in voluntarily surrendering to the results of the arbitration award, the implementation of the award will be accomplished by the enforcement of the assistance of the National Court. However, unlike the court's ruling, the arbitration tribunal does not generate enforcement power from the judgment itself, and it must be filed with the court for execution. In this regard, Germany provides for arbitration proceedings in the Civil Procedure Act Volume 10. In particular, Article 1060 governs the approval and enforcement of domestic arbitral awards. Accordingly, the procedure for declaring the feasibility of domestic arbitration proceedings and the execution of forced execution are commenced. Regarding the enforceable declaration of a domestic arbitral award, it differs from the simpler process requirements compared to the procedure in a foreign arbitral award, and usually has the same effect as a final judgment between the parties without a separate approval procedure. However, the arbitration award does not constitute an enforceable power that can be implemented, but is enforced through the national court's declaration procedure. However, if there is a ground for cancellation as provided for in Article 1059 (2) of the German Civil Procedure Act, the arbitral award is canceled and the application for enforcement is dismissed.

• 한국컴퓨터정보학회논문지
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• 제25권1호
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• pp.187-198
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• 2020

본 논문에서는 블록체인기반의 스마트계약의 규범성 인식과 스마트계약의 규범성에 대한 주요 영향요인을 통해 스마트계약이 계약규범으로 정착되기 위한 몇 가지 요건을 확인할 수 있었다. 첫째, 스마트계약의 규범적 필요성 측면에서 기술적 오류에 대한 법적 보호장치, 정부 차원의 홍보교육, 스마트계약 비즈니스를 규율할 기본법이 필요하다. 둘째, 스마트계약의 이용성 측면에서 책임소재가 명확하도록 설계된 블록체인을 기반으로 계약규범이 구성되어야 수범자들이 이를 수용하려 할 것이다. 셋째, 스마트계약의 규제 측면에서는 스마트계약을 기존 법률에서 포섭하거나 새로운 기본법 제정방안을 고려하되 스마트계약의 규범성이 사용 편이성보다 우선시 할 수 없는 것으로 인식하고 있음을 알 수 있다.

• Smart Structures and Systems
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• 제21권4호
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• pp.421-433
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• 2018

Carbon fiber reinforced polymer (CFRP) cable has good mechanical properties and corrosion resistance. However, the anchorage of CFRP cable is a big issue due to the anisotropic property of CFRP material. In this article, a high-efficient bonding anchorage with novel configuration is developed for CFRP cables. The acoustic emission (AE) technique is employed to evaluate the performance of anchorage in the fatigue test and post-fatigue ultimate bearing capacity test. The obtained AE signals are analyzed by using a combination of unsupervised K-means clustering and supervised K-nearest neighbor classification (K-NN) for quantifying the performance of the anchorage and damage evolutions. An AE feature vector (including both frequency and energy characteristics of AE signal) for clustering analysis is proposed and the under-sampling approaches are employed to regress the influence of the imbalanced classes distribution in AE dataset for improving clustering quality. The results indicate that four classes exist in AE dataset, which correspond to the shear deformation of potting compound, matrix cracking, fiber-matrix debonding and fiber fracture in CFRP bars. The AE intensity released by the deformation of potting compound is very slight during the whole loading process and no obvious premature damage observed in CFRP bars aroused by anchorage effect at relative low stress level, indicating the anchorage configuration in this study is reliable.

• 한국식생활문화학회지
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• 제26권1호
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• pp.17-29
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• 2011

As the public is already aware, baby food has a significant effect on a baby's physical and mental health. It is also very important because choice of baby food forms proper eating habits, which will affect health in the future. In particular, recognition of appropriate baby food by the mother or the primary care provider is even more important. Although many studies have been conducted on this matter for domestic housewives, no studies have been conducted on married immigrant housewives whose numbers are increasing every year. A survey was conducted on the recognition and current situation of baby food preparation by mothers living in Gangwon Province with children 6 to 36-months-old. The purpose of the study was to research the level of understanding of baby food by immigrant housewives given that they were raised in different environments with different eating habits and child raising norms. And additional purpose was to provide proper educational material and direction for choosing appropriate baby food. The results showed significant differences depending on the nationality and age of the mother. Moreover, the results showed an insufficient understanding of baby food but a high desire for education, as mothers did not receive enough support from society. Therefore, necessary education should be provided systematically after mothers fully learn to communicate in Korean. These mothers need continuous attention and support, so they can settle in this country as wives, daughters-in-law, and mothers. Moreover, the needed professional education should be provided so that the mothers can learn traditional Korean eating habits and understand differences in the culture and environment between countries. As the selection of baby food forms the basis of future eating habits and the foundation for good health, proper education should be available to establish healthy intercultural families.

• Journal of Microbiology
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• 제44권1호
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• pp.29-34
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• 2006

The purpose of this study was to develop molecular identification method for medical mushrooms and their preparations based on the nucleotide sequences of nuclear large subunit (LSD) rDNA. Four specimens were collected of each of the three representative medicinal mushrooms used in Korea: Ganoderma Incidum, Coriolus versicolor, and Fomes fomentarius. Fungal material used in these experiments included two different mycelial cultures and two different fruiting bodies from wild or cultivated mushrooms. The genomic DNA of mushrooms were extracted and 3 nuclear LSU rDNA fragments were amplified: set 1 for the 1.1-kb DNA fragment in the upstream region, set 2 for the 1.2-kb fragment in the middle, and set 3 for the 1.3-kb fragment downstream. The amplified gene products of nuclear large subunit rDNA from 3 different mushrooms were cloned into E. coli vector and subjected to nucleotide sequence determination. The sequence thus determined revealed that the gene sequences of the same medicinal mushroom species were more than $99.48\%$ homologous, and the consensus sequences of 3 different medicinal mushrooms were more than $97.80\%$ homologous. Restriction analysis revealed no useful restriction sites for 6-bp recognition enzymes for distinguishing the 3 sequences from one another, but some distinctive restriction patterns were recognized by the 4-bp recognition enzymes AccII and HhaI. This analysis was also confirmed by PCR-RFLP experiments on medicinal mushrooms.

• 한국컴퓨터정보학회논문지
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• 제15권10호
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• pp.157-164
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• 2010

최근에 RFID 시스템은 기술 및 애플리케이션 측면에서 많은 발전을 이룩해왔다. 특히 물류관리 분야에서도 이러한 RFID 시스템을 적용하고자 많은 노력들을 하고 있다. 아울러 철강업종의 물류부문에서도 RFID 시스템을 적용하면 많은 효율을 높일 수 가 있다. 그러나 철강산업에 RFID 시스템을 적용시에 태그와 안테나의 인식 등에서 많은 문제점이 있다. 이에 본 논문에서는 철강업종의 생산원가를 절감하는 도구로 RFID 시스템을 적용하는 연구를 수행하였다. 즉 철강업종에 적용가능한 RFID 기반의 추적관리 시스템을 제안한다. 본 논문의 결과로 자재 입출고시 100%의 인식이 나왔고 로케이션에서는 99%의 인식률을 확보하였다. 결론적으로 제안하는 RFID 기반의 추적관리 시스템은 기존의 시스템에 비해 생산성 향상 면에서 우수함을 보인다.