• 한국산업융합학회 논문집
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• 제25권6_1호
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• pp.953-959
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• 2022

In this paper, the design result of robotic tools and the development of robot control system for chemical coupler assembly are presented. This research aims to eliminate the risk of chemicals exposed to human operators by developing the robotic tools and robot automation system for chemical tank lorry unloading that were done manually. Due to tight tolerance between couplers, even small pose error may result in very large internal force. In order to resolve the problem, the 6-axis compliance device is employed, which can provide not only enough compliance between couplers but also F/T sensing. The 6-axis compliance device having large force and moment capacity is designed. A simple linear gripper with rack-and-pinion is designed to grasp two sizes of couplers. The proposed robot automation system consists of 6-DOF collaborative robot with offset wrist, 6-axis compliance device with F/T sensing, linear gripper, and two robot visions.

• 한국정밀공학회지
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• 제17권5호
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• pp.186-194
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• 2000

The purpose of this study is to investigate the difference in cutting characteristics of cermet, carbide and coated carbide tools in the similar application range via turning test of various conditions. The cermet and carbide tools in the range of ISO P10 grade were developed using optimum compositions with a view to obtaining a high toughness and hardness by PM process. First mechanical properties were characterized on these tools. Experimental results of wear behaviour and resistance to fracturing were presented and discussed in the turning of gray cast iron and alloy steels by cermet, carbide and coated carbide tools. The coated carbide tool shows similar cutting performance compared to the cermet, while the cermet has better combination of wear resistance and toughness of high speed (V=500m/min) cutting in comparison with carbide and coated carbide tools, and also shows a potentiality for cast iron cutting. Fe adhesive behaviour on the tools and surface roughness of workpieces were explained by chemical affinity between tools and workpieces.

• 한국가스학회지
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• 제22권2호
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• pp.1-20
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• 2018

Despite many measures, still from time to time catastrophic events occur, even after reviewing potential scenarios with HAZID tools. Therefore, it is evident that in order to prevent such events, answering the question: "What can go wrong?" requires more enhanced HAZID tools. Recently, new system based approaches have been proposed, such as STPA (system-theoretic process analysis) and Blended Hazid, but for the time being for several reasons their availability for general use is very limited. However, by making use of available advanced software and technology, traditional HAZID tools can still be improved in degree of completeness of identifying possible hazards and in work time efficiency. The new HAZID methodology proposed here, the Data-based semi-Automatic HAZard IDentification (DAHAZID), seeks to identify possible scenarios with a semi-automated system approach. Based on the two traditional HAZID tools, Hazard Operability (HAZOP) Study and Failure Modes, Effects, and Criticality Analysis (FMECA), the new method will minimize the limitations of each method. This will occur by means of a thorough systematic preparation before the tools are applied. Rather than depending on reading drawings to obtain connectivity information of process system equipment elements, this research is generating and presenting in prepopulated work sheets linked components together with all required information and space to note HAZID results. Next, this method can be integrated with proper guidelines regarding process safer design and hazard analysis. To examine its usefulness, the method will be applied to a case study.

• Applied Science and Convergence Technology
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• 제23권6호
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• pp.328-339
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• 2014

In this article, plasma monitoring tools and mulivariate analysis techniques were reviewed. Optical emission spectroscopy was reviewed for a chemical composition analysis tool and RF V-I probe for a physical analysis tool for plasma monitoring. Multivariate analysis techniques are discussed to the sensitivity improvement. Principal component analysis (PCA) is one of the widely adopted multivariate analysis techniques and its application to end-point detection of plasma etching process is discussed.

• 한국미생물생명공학회:학술대회논문집
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• 한국미생물생명공학회 2005년도 2005 Annual Meeting & International Symposium
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• pp.54-62
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• 2005

While genomics (the set of experimental and computational tools that allows the blueprints of life to be read) opens the doors to a more rational approach to the design and use of living cells to bring about desirable chemical transformations, genomics is, by itself, insufficient. We need tools that allow us to relate genomic and molecular information to cellular physiology and then to the response of a population of cells. We propose the development of hybrid computer cellular models. In such models genomics and chemical detail for a cellular subsystem (e.g. pathogenesis) is embedded in a coarse-grain cell model. Such a construct allows the quantitative and explicit linkage of genomic detail to cell physiology to the extracellular environment. To illustrate the principles involved we are constructing a model for a minimal cell. A minimal cell is a bacterial cell with the fewest number of genes necessary to sustain life as a free living microbe.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1081-1081
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• 2001

The constant need for quality improvement and production rationalization in the chemical and related industries has led to the increasing replacement of conservative control procedures by more specific and environmentally compatible analytical techniques. In this respect, vibrational spectroscopy has developed over the last yews - in combination with new instrumental accessories and statistical evaluation procedures - to one of the most important analytical tools for industrial chemical quality control and process monitoring in a wide field of applications. In the present communication this potential is demonstrated in order to further support the implementation of mid-infrared (MIR), near-infrared (NIR) and Raman spectroscopy Primarily as industrial on-line tools. To this end the data of selected feasibility studies will be discussed in terms of the individual strengths of the different techniques for the respective application.

• 한국과학교육학회지
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• 제43권2호
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• pp.181-190
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• 2023

이 연구에서는 증강현실을 활용한 소집단 학습에서 도구 사용 환경에 따른 담화를 참여 유형, 담화의 유형, 지식 형성 과정 측면에서 비교하였다. 고등학교 1학년 학생 24명을 6개 모둠으로 나눈 후, 마커 1개와 스마트 기기 1개를 공동으로 사용하는 도구 공유 환경과 마커와 스마트 기기를 개별로 사용하는 개별 도구 환경에 각각 배치하였다. 학생들은 모둠별로 물질의 규칙성과 결합 단원에서 다루는 개념을 주제로 증강현실 애플리케이션을 활용한 소집단 학습에 참여하였다. 모든 수업 과정은 모둠별로 녹음 및 녹화하였으며, 자발적으로 동의한 학생 6명을 대상으로 반구조화된 면담을 실시하였다. 연구결과, 도구 공유 환경은 일인 주도형의 비율이 높았으나, 개별 도구 환경은 부분 참여형 및 다수 참여형의 비율이 높았다. 개별 도구 환경은 도구 공유 환경보다 지식 공유와 지식 구성 담화의 비율이 유사하였고, 세부 담화 유형도 다양하였다. 도구 공유 환경에서는 일부 학생에 대해서만 의미 있는 지식 형성 과정이 나타났다. 반면 개별 도구 환경에서는 모둠원 대부분이 목표 개념에 대해 올바른 지식을 구성하며 의미 있는 지식 형성 과정이 이루어졌으며, 일부 모둠원에게 나타난 오개념은 소집단 토의를 통해 올바른 과학 개념으로 수정되었다.

• 분석과학
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• 제13권4호
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• pp.440-445
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• 2000

흔적량 입자분석을 위해서는 흔적량의 입자를 다룰수 있는 미세도구가 필요하며 이들을 능숙하게 다룰수 있는 기술 또한 필수적이다. 본 연구에서는 다양한 미세도구들의 제작 및 사용방법을 소개하고 원자력 시설의 먼지시료 중 존재하는 우라늄입자의 동위원소비를 측정하였으며 이 결과로부터 미신고 핵활동 시설에서 사용한 우라늄의 종류를 알아 낼 수 있는 기술의 가능성을 확인하였다. 원자력 시설내의 오염가능 지역에서 기기의 표면 또는 바닥을 여과지로 문질러 시료를 채취하였고 먼지 중 존재하는 흔적량의 우라늄입자는 고체트랙 검출기를 이용하여 참아내었으며, 찾은 미세크기의 우라늄 입자는 미세도구를 사용하여 절단 분리한 후 TIMS의 필라멘트로 옮겨서 우라늄입자의 동위원소 비를 측정하였다.

• Molecules and Cells
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• 제45권12호
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• pp.877-882
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• 2022

Taste sensation is the process of converting chemical identities in food into a neural code of the brain. Taste information is initially formed in the taste buds on the tongue, travels through the afferent gustatory nerves to the sensory ganglion neurons, and finally reaches the multiple taste centers of the brain. In the taste field, optical tools to observe cellularlevel functions play a pivotal role in understanding how taste information is processed along a pathway. In this review, we introduce recent advances in the optical tools used to study the taste transduction pathways.

• KSBB Journal
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• 제30권5호
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• pp.230-238
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• 2015

Abnormal glycosylation can significantly affect the intrinsic functions (i.e., stability and solubility) of proteins and the extrinsic protein interactions with other biomolecules. For example, recombinant glycoprotein therapeutics needs proper glycosylation for optimal drug efficacy. Therefore, there has been a strong demand for rapid, sensitive and high-through-put glycomics tools for real-time monitoring and fast validation of the biotherapeutics glycosylation. Although liquid chromatography tandem mass spectrometry (LC-MS/MS) is one of the most powerful tools for the characterization of glycan structures, it is generally time consuming and requires highly skilled personnel to collect the data and analyze the results. Recently, as an alternative method, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-MS), which is a fast, robust and easy-to-use instrumentation, has been used for quantitative glycomics with various chemical derivatization techniques. In this review, we highlight the recent advances in MALDI-MS based quantitative glycan analysis according to the chemical derivatization strategies. Moreover, we address the application of MALDI-MS for high-throughput glycan analysis in many fields of clinical and biochemical engineering.