• Proceedings of the Korean Operations and Management Science Society Conference
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• 2000.04a
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• pp.413-416
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• 2000

현재 소비자의 광고 효과 측정에 대한 연구는 정보 처리 모형에 근거한 인지 반응 연구와 주관적인 감성 반응 연구가 주를 이루고 있다. 이에 본 연구에서는 TV 광고에 대한 광고 효과를 인지와 감성적 부분으로 분류하여 해석한 Shimp(1981)의 모델을 기초로하여 각각의 뇌파의 반응을 측정하였고, 동시에 광고에 대한 감성형용사, 선호도, 구매 욕구를 통한 주관적 평가를 실시하였다. 그 결과 정보전달형 광고와 감성자극형 광고에 있어 뇌파 활성도, 감성형용사, 선호도의 차이를 나타냈다. 본 결과는 광고에 대한 소비자의 반응을 정량적인 방법으로 측정하여, 광고 효과 파악을 위한 새로운 모델의 가능성을 제시하였다는데 의의가 있다.

• Science of Emotion and Sensibility
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• v.6 no.4
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• pp.15-23
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• 2003

Recently, there have been many attempts to develop BCI (brain computer interface) based on EEG (electroencephalogram). Measurement and analysis of EEG evoked by particular stimulation is important for the design of brain wave pattern and interface of BCI. The purpose of this study is to develop a general-purpose system that measures subject's reaction time after audio-visual stimulation which can work together with any other biosignal measurement systems. The entire system is divided into four modules, which are stimulation signal generation, reaction time measurement, evoked potential measurement and synchronization. Stimulation signal generation module was implemented by means of Flash. Measurement of the reaction time (the period between the answer request and the subject reaction) was achieved by self-made microcontroller system. EEG measurement was performed using the ready-made hardware and software without any modification. Synchronization of all modules was achieved by, first, the black-and-white signals on the stimulation screen synchronized with the problem presentation and the answer request, second, the photodetectors sensing the signals. The proposed method offers easy design of purpose-specific system only by adding simple modules (reaction time measurement, synchronization) to the ready-made stimulation and EEG system, and therefore, it is expected to accelerate the researches requiring the measurement of evoked response and reaction time.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.10
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• pp.1427-1434
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• 2021

In this paper, we propose a psychological state estimation process that computes children's attention and tension in response to training stimuli. Joint attention was adopted as the training stimulus required for behavioral intervention, and the Discrete trial training (DTT) technique was applied as the training protocol. Three types of training stimulation contents are composed to check the user's attention and tension level and provided mounted on a character-shaped tabletop robot. Then, the gaze response to the user's training stimulus is estimated with the vision-based head pose recognition and geometrical calculation model, and the nervous system response is analyzed using the PPG and GSR bio-signals using heart rate variability(HRV) and histogram techniques. Through experiments using robots, it was confirmed that the psychological response of users to training contents on joint attention could be quantified.

• 건강소식
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• v.30 no.4 s.329
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• pp.32-33
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• 2006

우리가 적응해야 할 외부의 자극이나 변화를 말한다. 또한 그때 느끼는 생리적.행동적 반응도 스트레스라고 한다. 일반적으로 스트레스하면 나쁜 것으로만 생각하는데 사실은 그렇지 않다. 만약 변화나 자극이 전혀 없다면 너무 권태롭고 지루할 것이다. 적당한 자극과 변화는 우리 삶의 활력소가 된다. 어떻게 받아들이느냐에 따라 스트레스가 긍정적인 측면으로 작용할 수도 있다.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1996.04a
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• pp.274-274
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• 1996

1차적인 제형의 조제를 위해서 비이온성 계면활성제인 poloxamer 류, Tween 류, octylphenylether와 양심 계면활성제인betaine 류와 방부제인 croquat 류에 대한 시험을 실시하여 자극을 나타내지 않은 성분을 선별하였다. 이를 근거로 isotonic sodium borate 용액을 완충액으로 사용하여, 최종제형을 조제하여 시험한 결과 자극반응을 나타내지 알았으며, 본 제형을 실온과 4$0^{\circ}C$에서 2, 4, 6개월간 안정성 시험을 거친 후 시험시에도 전혀 자극반응을 나타내지 않았다.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2006.05a
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• pp.355-358
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• 2006

본 연구에서는 아동이 유머와 슬픔을 느낄 때 나타나는 자율신경계 및 안면근육반응의 차이를 밝히고자 하였다. 11-13세의 아동 47명(남: 23명, 여: 24명)에게 각 정서를 유발하는 동영상 자극을 2분 동안 제시하고, 이때의 심리반응과 생리반응(SKT, EDA, ECG, EMG)을 측정하였다. 각 정서는 적합하고 효과적으로 유발되었고, 자율신경계반응에서는 유머가 슬픔보다 피부 전도수준, 피부전도반응, 피부전도반응의 수, 심박률분산에서 유의하게 큰 반응을 보였다. 반면 피부온도는 유머에 비하여 슬픔에서 크게 증가하였다. 안면근육반응 결과, 유머가 Orbicularis oris muscle에서 슬픔보다 더 큰 근육활동의 증가를 나타내었다. 결론적으로 아동은 유머와 슬픔에서 서로 다른 자율신경계와 안면근육의 반응을 보였다.

• The Korean Journal of Pesticide Science
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• v.14 no.2
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• pp.79-85
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• 2010

This study was investigated to review the potentials of irritation and skin sensitization of active ingredients and end-use products of pesticides for pesticide registration, prediction of irritation and sensitization, and data requirements for other purposes. Pesticide irritation and sensitization referred to the Pesticide Manual(14th edition), while toxicity was evaluated based on the data submitted by the pesticide registrant. Totally 148 active ingredients and 149 end-use products were analyzed to compare the positive response, formulation type, and correlation between active ingredients and products. Among active ingredients, ratio of positive response to skin irritation, eye irritation, and skin sensitization were 18.8, 47.0 and 20.6% respectively. While, positive response to skin irritation, eye irritation, and skin sensitization of the products were 14.9, 38.9 and 23.6%, respectively. Emulsifiable concentrate showed the highest positive response among formulation types showing skin irritation 31.3%, eye irritation 81.3%, and skin sensitization 31.3%. On the other hand granule type showed the lowest response with skin 4.8, eye 14.3 and sensitization 14.8%. There was no correlation by active ingredient content on irritation and sensitization of products. However, both active ingredients and products showed same positive response were skin 73.1%, skin sensitization 66.2%, and eye irritation 44.7%. By the these results, correlation between technical grade of active ingredients and end-use products would be use for pesticide management at the screening stage, especially skin irritation and skin sensitization.

• Prospectives of Industrial Chemistry
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• v.21 no.1
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• pp.3-18
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• 2018

전자피부(Electronic skin)는 외부 환경과의 상호작용하는 인간 피부의 기능을 대체하여 외부 자극 신호를 전기적 신호로 변환하는 센서들로 이루어진 인공피부로써, 최근 인간과 전자기기 간의 인터페이스에 대한 관심이 급증하면서 이에 대한 많은 연구들이 진행되고 있다. 그중에서도 피부의 주된 기능인 외부 물리적 자극을 인지하는 촉각을 모방하는 촉각센서는 많은 발전을 거쳐 왔으며, 한계를 극복하고자 다양한 연구들이 진행되고 있다. 촉각센서는 압력, 인장, 굽힘과 같은 물리적 자극에 반응하며, 물리적 자극 신호를 아날로그 및 디지털 신호로 변환하여 인지하는 연구들이 폭넓게 개발되고 있다. 또한, 소자의 구조에 따라 물리적 자극을 전달하는 다양한 변환 방식들이 있으며, 최근에는 각 신호 변환 방식의 민감도, 반응속도, 자극 인지 범위 등의 한계점을 극복하고, 소재의 기계적 물성을 향상시키기 위해 소재의 변형을 주거나 생체의 기관 구조 및 외부 자극 인지 원리 등을 모사한 연구들이 많은 관심을 받고 있다. 본 기고에서는 이러한 촉각센서의 물리적 자극 신호 변환 방식과 소재 변형 및 생체 모사를 통한 다양한 연구들을 소개하고자 하며, 이를 통하여 촉각센서의 나아갈 방향을 제시하고자 한다.

• Science of Emotion and Sensibility
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• v.24 no.4
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• pp.107-116
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• 2021

This study aims to investigate the effect of multisensory stimulation on relieving the stress experienced by drivers. The photoplethysmograms (PPGs) of 30 healthy subjects were measured, and their subjective response to stressful situations and normal driving were evaluated. The subjects underwent nonstimulation and multisensory stimulation in stressful driving situations. Heart rate estimation from the PPG was collected via an ear-type sensor to reduce movement noise. The signals acquired were sampled at 200 Hz using BIOPAC PPG100C. Heart rate variability (HRV) was analyzed to compare the effect of multisensory stimulation on stress situations. In the multisensory stimulation, blue, green, and yellow were used for the visual sensory system; white, pink, and brown noises were used for the auditory sensory system; and lavender, lemon, and rosemary were used for the olfactory sensory system. No difference was observed in the subjective evaluation; however, the HRV results showed an increased HF (%) and decreased LF (%) and LF/HF (%) in the multisensory stimulation (e.g., green, pink noise, and rosemary) when compared to the nonstimulation.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.12
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• pp.2827-2835
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• 2010

When the inferiorthreshold potential is applied on the membrane, the resting status membrane does not display any specific reaction, in the meanwhile if it receives somewhat higher voltages then it shows entirely different configuration. The fact that there is this kind of characteristics on the exciting membrane has been known for a long time, and some researchers have tried to analyze this situation using the electrical circuits but only limitted to inferiorthreshold potential case. The quantitative studies of especially for transthreshold stimulus is extremely rare up to now. The direct application of electrical circuit to biostatus is somewhat uneasonable because there may be much differences between them. We studied the electrical reaction quantitatively of biomembrane when it receives the transthreshold stimulus in point of electricity in this paper.