• 컴퓨터교육학회논문지
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• 제16권6호
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• pp.55-70
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• 2013

본 연구에서는 로봇 교육의 지속 발전성을 제고하고 지원할 목적으로 로봇 소양 교육과정을 구성해서 제안해 보았다. 이를 위해서 로봇 소양 교육을 기존의 문해력에 관한 내용을 참고하여 정의했으며, 아울러 로봇 소양의 요소들도 모두 다섯 가지로 나누어 제시했다. 여기서 제시한 로봇 소양 교육의 영역은 로봇의 기초 영역과 로봇 공학의 세 가지 요소를 바탕으로 한 로봇과 함께하는 측정, 관찰, 로봇으로 만드는 운동과 표현, 나만의 로봇 설계 그리고 종합적 활동 영역으로 제시하였다. 한편, 로봇 소양 교육과정 개발 단계는 Tyler(1949)의 고전적인 교육과정 개발모형을 적용하여 로봇 소양 교육과정 구성의 타당성과 신뢰성을 확보하고자 했으며 이를 바탕으로 기존 초, 중학교의 수학, 과학교과 교육과정을 분석하고 로봇 소양 교육과정을 제안하였다.

• 한국의류산업학회지
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• 제14권5호
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• pp.803-810
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• 2012

This study investigates the effect of nonverbal communication on trust, switching barrier, and repurchase intention. Sample subjects used in this study were customers of a fashion shop in Sunchon. The questionnaires were conveniently sampled from July 2010 to August 2010. Questionnaire data from 335 customers of a national brand were analyzed through a reliability analysis, factor analysis, and multiple regression analysis. The results of this study are as follows. First, nonverbal communication by the service provider was divided into 3 types, physical appearance and paralanguage, postures and proxemics, and facial expressions. Second, it was found that physical appearance and paralanguage, postures and proxemics, facial expression of nonverbal communication had a significant impact on customer trust. Third, given the relationship between nonverbal communication and switching barrier, it was represented that the postures and proxemics and facial expressions (except physical appearance and paralanguage) had a significantly positive influence on the switching barrier. Forth, physical appearance/paralanguage, postures/proxemics, and facial expressions (nonverbal communication) had a positive influence on repurchase intention. Fifth, given the relationship between trust and repurchase intention as well as switching barrier and repurchase intention, it was represented that trust and switching barrier have a significantly positive influence upon repurchase intention. According to the results of this study, the more positive nonverbal communication by the service provider then the higher the customer repurchase intention as well as trust and switching barrier. Fifth, given the relationship between trust and repurchase intention as well as switching barrier and repurchase intention, it was represented that trust and switching barrier have a significantly positive influence upon repurchase intentions.

• 한국시뮬레이션학회논문지
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• 제24권2호
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• pp.19-29
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• 2015

국방분야에서 M&S 기법은 분석, 훈련, 획득 등 다양한 목적으로 활용되고 있으며 그 중요성은 더욱 증가하고 있다. 무기체계의 종합군수지원(ILS)요소 개발을 위한 RAM분석 시 M&S 기법을 활용하면 수리적인 기법만으로는 분석하기 어려운 시스템의 다양한 변수와 제약사항을 고려한 분석이 가능하다. 무기체계의 RAM분석을 위한 ILS M&S도구를 설계하기 위해서는 M&S의 목적 설정, 무기체계의 특성 및 유사 M&S Tool 기능 분석 등의 활동이 선행되어야 하며 이를 바탕으로 실제 현실을 프로그램으로 구현하기 용이한 형태의 수학적, 논리적 언어로 모델링해야 한다. 본 논문에서는 'OO유도무기체계'의 배치부터 폐기 시까지 발생하는 운용, 저장, 점검, 고장발생, 정비 등 제반 군수지원활동을 모의하여 유도무기체계의 수명주기 동안의 RAM 특성을 예측, 분석할 수 있는 M&S 도구의 모델링 과정을 제시하고자 하며 이는 유사 M&S 도구의 개발 시 참고자료로도 활용 가능할 것이다.

• 대한인간공학회지
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• 제31권2호
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• pp.271-279
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• 2012

Objective: This study classified three different emotional states(boredom, pain, and surprise) using physiological signals. Background: Emotion recognition studies have tried to recognize human emotion by using physiological signals. It is important for emotion recognition to apply on human-computer interaction system for emotion detection. Method: 122 college students participated in this experiment. Three different emotional stimuli were presented to participants and physiological signals, i.e., EDA(Electrodermal Activity), SKT(Skin Temperature), PPG(Photoplethysmogram), and ECG (Electrocardiogram) were measured for 1 minute as baseline and for 1~1.5 minutes during emotional state. The obtained signals were analyzed for 30 seconds from the baseline and the emotional state and 27 features were extracted from these signals. Statistical analysis for emotion classification were done by DFA(discriminant function analysis) (SPSS 15.0) by using the difference values subtracting baseline values from the emotional state. Results: The result showed that physiological responses during emotional states were significantly differed as compared to during baseline. Also, an accuracy rate of emotion classification was 84.7%. Conclusion: Our study have identified that emotions were classified by various physiological signals. However, future study is needed to obtain additional signals from other modalities such as facial expression, face temperature, or voice to improve classification rate and to examine the stability and reliability of this result compare with accuracy of emotion classification using other algorithms. Application: This could help emotion recognition studies lead to better chance to recognize various human emotions by using physiological signals as well as is able to be applied on human-computer interaction system for emotion recognition. Also, it can be useful in developing an emotion theory, or profiling emotion-specific physiological responses as well as establishing the basis for emotion recognition system in human-computer interaction.

• 전기전자학회논문지
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• 제23권3호
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• pp.934-940
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• 2019

본 논문에서는 낮은 비용과 높은 신뢰성 그리고 데이터율이 좋은 비-코히어런트 카오스 통신을 위한 역방향 차동 카오스 편이변조(Reverse Differential Chaos Shift Keying, RE-DCSK) 시스템을 제안한다. RE-DCSK의 참조 신호들은 기존 차동 카오스 편이 변조 방식(DCSK)에서처럼 첫 번째 슬롯에서 전송하며 두 번째 슬롯에서는 시간 반전 블록이 카오스 신호의 자기상관 관계를 강화시키고 두 신호의 직교성을 이용하여 정보신호의 역할을 한다. RE-DCSK는 시스템의 복잡성에 따르는 어떠한 추가 비용도 없이 DCSK와 비교했을 때 상대적으로 두 배의 전송률을 가능하게 하고 통신의 보안 성능도 역시 향상시킨다. 그 효율성을 입증하기 위해 도출한 BER 표현식을 기반으로 레일리 페이딩 채널과 부가 백색 가우시안잡음(AWGN) 채널을 통하여 분석한다. 제안한 시스템의 BER 성능은 AWGN 채널을 사용한 상호지연 편이변조 방식(CDSK)와 DCSK 시스템과 비교하였을 경우 성능이 향상된다.

• 한국정보통신학회논문지
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• 제21권10호
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• pp.1964-1972
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• 2017

K-water에서는 2008년부터 부자식 및 초음파, 레이다식의 수위계에 대한 ISO 17025 국제공인 교정기관을 운영하고 있다. 현재까지 수위계의 교정은 고정표준실에서 실내 교정만이 가능하였으며, 이는 현장 등의 실외에서 교정하는 시스템의 부재가 원인이었다. 따라서 현장에서도 교정이 가능하도록 2015년에 이동형 교정시스템을 개발하였으며, 2016년에 각종 심사 및 위원회를 거쳐 한국인정기구(KOLAS)로부터 인정을 받았다. 본 논문에서는 한국인정기구로부터 인정받은 수위계 이동형 교정시스템 중 부자식 수위계를 현장에서 교정할 수 있는 교정시스템에 대하여 표준기 및 측정과 관련한 제반 사항에 대하여 검토하였다. 또한 설계의 기반이 되는 수학 모델을 도출하였으며, 이동형 교정시스템 구축을 통하여 수문관측 데이터에 대한 과학적인 시스템 운영으로 측정 데이터의 신뢰성을 확보하고자 하였다.

• 한국전자거래학회지
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• 제11권2호
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• pp.93-110
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• 2006

웹 서비스를 기반으로 하는 비즈니스 프로세스 관리 시스템은 트랜잭션에 대한 신뢰도의 확보를 위하여 트랜잭션 관리가 필요하다. 이를 위한 여러 트랜잭션 프로토콜들이 제시되었지만, 다양한 프로토콜들은 서로간의 이질성으로 인해 트랜잭션 관리 시스템간의 상호 호환을 저해한다. 본 연구에서는 시맨틱스를 기반으로 비즈니스 트랜잭션 프로토콜을 정의한다. 제안된 시맨틱스에 기반한 비즈니스 트랜잭션은 상태와 메시지에 대한 정적 시맨틱스(Static Semantics)와 상태 전이에 관한 동작 시맨틱스( Operational Semantics)를 기반으로 정의된다. 정적 시맨틱스는 상태와 메시지에 대한 의미들을 Web Ontology Language(OWL)을 사용하여 온톨로지 기반으로 정의함으로써 비즈니스 트랜잭션 프로토콜의 개념들에 대한 표현의 이질성을 해결한다. 동작 시맨틱스는 비즈니스 트랜잭션의 상태전이를 Abstract State Machine(ASM)을 통해 정의함으로써 트랜잭션 운용에 대한 정형성(Formalism)을 얻을 수 있다. 또한 정적 시맨틱스에서 정의한 상태와 메시지를 동작 시맨틱스에서 참조하여 사용함으로써 트랜잭션 운용에 대한 이해도 높일 수 있다. 이를 통해 기존의 트랜잭션 프로토콜들간의 상호 호환성을 높이고 트랜잭션 프로토콜에 대한 상호 이해도를 높이며, 트랜잭션 실행에 대한 자동화와 체계적인 모니터링을 지원할 수 있을 것으로 기대된다.

• 대한간호학회지
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• 제11권1호
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• pp.45-63
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• 1981

This study was done to determine the relationship between the anxiety levels of hospitalized psychiatric patients and various influencing variables. The purpose of this study was to determine factors that may help hospitalized psychiatric patients to experience lower levels of anxiety in relation to changing situations and provide the basic data for a dynamic approach which is important in the field of modern psychiatric nursing that understands and analyses the meaning of patients behavior. The anxiety may produce stress, which is a common experience among all human beings. Patients may merely feel uncomfortable in the state of mild anxiety, however, the severe state could be an obstacle to treatment and recovery from disease. The anxiety of the psychiatric patient is a factor which greatly influencing the patient's behavior, so his disorderd behavior is an expression of defence or pathologically fixed behavior. According the psychiatric patient's anxiety at the time of admission is the concern of the health team. The nurse's special concern has to do with understanding and supporting the patient and meeting his individual needs by frequent close contact during the entire hospitalization period, compared to other teamembers the nurse's responsibility in this regard is greated. So this study emphasizes the necessity of creating conditions these, but above all the psychiatric nurse should create a therapeutic environment by not only regarding the patient's behavior or symptoms but understanding the meaning of them. The subjects of this study were 57 psychiatric patients selected from the K neuropsychiatric hospital located in Kunsan city. Data were collected twice from the same patients within a 24 hour period after admission and 10 days after admission. (September 18th to November 8th, 1980). The data collected method was through direct interview, and the interview time was 20 minutes for each patient. Data analysis included Item Analysis & Internal Consistency Reliability Tests, Percentages, t-test, analysis of variance and stepwise multiple regression analysis. The findings of this study were as follows. A. Test of Hypothesis a. Hypothesis 1 :“The anxiety level of psychiatric patients within 24 hours after admission will be higher than those of the same patients 10 days after admission,”was accepted. (t = 3. 15 ; p < 0.005) b. Hypothesi 2:“The more the number of admissions the higher the level of anxiety related to two categories”, was accepted. (affective anxiety: F = 5.50, p < 0.005, Somatic anxiety: F = 9.12, p <.

• Restorative Dentistry and Endodontics
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• 제37권2호
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• pp.84-89
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• 2012

Objectives: This study analyzed the difference in color caused by different thickness in enamel layer of composite resins when applied with single and layering placement technique, and evaluated if the results agreed with the shade guide from the manufacturers to verify reliability of the color matching process of the manufacturers. Materials and Methods: For single composite resin samples, 6 mm diameter and 4 mm thickness cylindrical samples were fabricated using Ceram-X mono (DENTSPLY DeTrey) and CIE $L^*a^*b^*$ values were measured with spectrophotometer. Same process was done for layering composite resin samples, making 3 dentinal shade samples, 4 mm thickness, for each shade using Ceram-X duo (DENTSPLY DeTrey) and enamel shade resins were layered in 2 mm thickness and CIE $L^*a^*b^*$ values were measured. These samples were ground to 0.2 mm thickness each time, and CIE $L^*a^*b^*$ values were measured to 1 mm thickness of enamel shade resin. Results: Color difference (${\Delta}E^*$) between single and layering composite resin was 1.37 minimum and 10.53 maximum when layering thicknesses were between 1 mm and 2 mm and 6 out of 10 same shade groups suggested by manufacturer showed remarkable color difference at any thickness (${\Delta}E^*$ > 3.3). Conclusion: When using Ceram-X mono and duo for composite resin restoration, following the manufacturer's instructions for choosing the shade is not appropriate, and more accurate information for Ceram-X duo is needed on the variation and expression of the shades depending on the thickness of the enamel.

• Geomechanics and Engineering
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• 제28권3호
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• pp.299-311
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• 2022

Water-resisting key stratum (WKS) between coal seams is an important barrier that prevents water inrush from goaf in roof under multi-seam mining. The occurrence of water inrush can be evaluated effectively by analyzing the fracture of WKS in multi-seam mining. A "long beam" water inrush mechanical model was established using the multi-seam mining of No. 2+3 and No. 8 coal seams in Xiqu Mine as the research basis. The model comprehensively considers the pressure from goaf, the gravity of overburden rock, the gravity of accumulated water, and the constraint conditions. The stress distribution expression of the WKS was obtained under different mining distances in No. 8 coal seam. The criterion of breakage at any point of the WKS was obtained by introducing linear Mohr strength theory. By using the mechanical model, the fracture of the WKS in Xiqu Mine was examined and its breaking position was calculated. And the risk of water inrush was also evaluated. Moreover, breaking process of the WKS was reproduced with Flac3D numerical software, and was analyzed with on-site microseismic monitoring data. The results showed that when the coal face of No. 8 coal seam in Xiqu Mine advances to about 80 m ~ 100 m, the WKS is stretched and broken at the position of 60 m ~ 70 m away from the open-off cut, increasing the risk of water inrush from goaf in roof. This finding matched the result of microseismic analysis, confirming the reliability of the water inrush mechanical model. This study therefore provides a theoretical basis for the prevention of water inrush from goaf in roof in Xiqu Mine. It also provides a method for evaluating and monitoring water inrush from goaf in roof.