• The Journal of Korea Robotics Society
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• v.4 no.4
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• pp.327-333
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• 2009

This paper describe the riding robot system named by "RideBot" which is a riding robot like as a horse. In order to simulate the riding motions, we develope the saddle mechanism which can generate 3 DOF motions including pitch, roll, and bounce movement, and also we controlled the riding motions and the intention of horseman. To generate the riding motions with the bodily sensation, we developed Novel Washout Filter and the algorithms for motion control. And also, we developed some health care service for the health care of horseman. A body state index was proposed that evaluates the personal health state from both the measured physiological variables and the surveyed questions. The physiological variables such as weight, blood pressure, heart rate variability (HRV), accelerated state photoplethysmograph(APG), body fat, and happiness index were measured by the specially designed bio-handle system and survey questions. The efficiency of the proposed ride robot is evaluated in the experiments.

• Journal of the Korean Institute of Telematics and Electronics
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• v.15 no.5
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• pp.25-28
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• 1978

This paper deals with the development research on the application of the principle of polyphase envelope detectioal),2) to extract the envelope from the complex physiological signal waveforms, which otherwise would be very difficult to observe and determine. In order to verify the developed system, the experimental results are included.

• Perspectives in Nursing Science
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• v.2 no.1
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• pp.61-75
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• 2005

Physical and psychological events can produce stress response in various degrees. Stress affects many aspects of physiology including both brain and peripheral elements which is represented as hypothalamus-pituitary-adrenal axis. Brain elements consist of corticotropin-releasing hormone(CRH), locus ceruleus(LC)-norepinephrine(NE)/autonomic system. Peripheral elements include pituitary-adrenal axis and the autonomic nervous system, which coordinate the stress response. Current trend of the stress researches is emphasizing the mechanisms of the stress response which is adaptive or become maladaptive. This review introduces 1) the concepts of stress, 2) physiological and behavioral aspects of stress responses, 3) the consequences of stress response, 4) the measurements of stress and 5) stress management for those interested in stress research.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.4
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• pp.364-371
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• 2013

Emotion Recognition is one of the important part to develop in human-human and human computer interaction. In this paper, we have focused on the performance of multi-class SVM (Support Vector Machine) with Gaussian RFB (Radial Basis function) kernel, which has been used to solve the problem of emotion recognition from physiological signals and to improve the accuracy of emotion recognition. The experimental paradigm for data acquisition, visual-stimuli of IAPS (International Affective Picture System) are used to induce emotional states, such as fear, disgust, joy, and neutral for each subject. The raw signals of acquisited data are splitted in the trial from each session to pre-process the data. The mean value and standard deviation are employed to extract the data for feature extraction and preparing in the next step of classification. The experimental results are proving that the proposed approach of multi-class SVM with Gaussian RBF kernel with OVO (One-Versus-One) method provided the successful performance, accuracies of classification, which has been performed over these four emotions.

• KSBB Journal
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• v.30 no.5
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• pp.245-252
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• 2015

The aim of this study was to investigate the efficacy of enhanced physiological activities in cultures isolated from Korean fermented watery Kimchi, Dongchimi, of single lactic acid bacteria (LAB), and when these three are mixed LAB as probiotics. Using the BIOLOG system and 16S rRNA sequencing, the isolates were characterized, and identified and assigned to Leuconostoc mesenteroides DK-3, Leuconostoc dextranicum DK-6, and Lactobacillus curvatus DK-13, respectively. Growth rate and pH changes, production of organic acids as metabolites, and physiological activities of the single and mixed LAB cultures, were monitored and compared. In mixed LAB cultures after 72 h of incubation, the maximum concentrations of lactic acid and acetic acid were approximately 340.5 mM and 191.9 mM, respectively, and pH changed from 7.00 to 3.62. Mixed LAB cultures were able to eliminate 96.3% of nitrite. Activities of antioxidant and ${\beta}$-galactosidase were 60.3% and 16.8 units/mg, respectively. Significant antibacterial activity of the concentrated supernatants was demonstrated against several food-poisoning bacteria. Physiological activities obtained from the mixed LAB cultures have been shown to be considerably higher than those of single LAB cultures. In conclusion, these studies demonstrate that compared to the single cultures, all physiological activities in mixed LAB cultures are significantly enhanced.

• Biomolecules & Therapeutics
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• v.30 no.2
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• pp.184-190
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• 2022

Targeting the cystine/glutamate exchange transporter, system x_c^-, is a promising anticancer strategy that induces ferroptosis, which is a distinct form of cell death mediated by iron-dependent lipid peroxidation. The concentration of ⳑ-cystine in culture medium is higher than the physiological level. This study was aimed to evaluate the effects of ⳑ-cystine concentration on the efficacy of ferroptosis inducers in hepatocellular carcinoma cells. This study showed that treatment with sulfasalazine or erastin, a system x_c^- inhibitor, decreased the viability of Huh6 and Huh7 cells in a dose-dependent manner, and the degree of growth inhibition was greater in medium containing a physiological ⳑ-cystine concentration of 83 µM than in commercial medium with a concentration of 200 µM ⳑ-cystine. However, RSL3, a glutathione peroxidase 4 inhibitor, decreased cell viability to a similar extent in media containing both ⳑ-cystine concentrations. Sulfasalazine and erastin significantly increased the percentages of propidium iodide-positive cells in media with 83 µM ⳑ-cystine, but not in media with 200 µM ⳑ-cystine. Sulfasalazine- or erastin-induced accumulation of lipid peroxidation as monitored by C11-BODIPY probe was higher in media with 83 µM ⳑ-cystine than in media with 200 µM ⳑ-cystine. In contrast, the changes in the percentages of propidium iodide-positive cells and lipid peroxidation by RSL3 were similar in both media. These results showed that sulfasalazine and erastin, but not RSL3, were efficacious under conditions of physiological ⳑ-cystine concentration, suggesting that medium conditions would be crucial for the design of a bioassay for system x_c^- inhibitors.

• Journal of the Ergonomics Society of Korea
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• v.25 no.4
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• pp.9-22
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• 2006

1/f fluctuation characteristics can be seen in various natural phenomena, such as breezes, streams, candle flames and the luminous patterns of fireflies. It is said that the 1/f fluctuation are comfortable for human beings. And they are introduced into many industrial products, such as an air conditioner, music, lighting, etc. This study focused on verifying the effects of 1/f fluctuation sound on comfort sensibility. Stimulus were divided into three groups(Group 1, 2, 3) by sound generation methodology. Fluctuation patterns of group 1, 2 were given by three types of fluctuation, 1/f0, 1/f1, 1/f2, and its of group 3 were given by two types of pure tone, 1/f1. In order to verify the effects, we measured the physiological responses of the subjects such as EEG(Electroencephalogram), ERP(Event-Related Potential), and these physiological responses were compared with subjective assessments, free answers. Consequently, we found that factor which had an effect on comfort sensibility was cognitive factor(for stimulus) rather than 1/f fluctuation sound pattern.

• Proceedings of the Korea Society of Poultry Science Conference
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• 2003.11a
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• pp.138-139
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• 2003

Specific biomarkers to detect significant immunological or physiological responses would be extremely valuable on the development of feeding technique. Proteomics, the study of proteins within a cell or biological samples, may offer a novel approach to immunological or physiological monitoring of chicken responses to immune system. By studying the protein content of cells responding to a vaccine or growth factor, it may be possible to develop a metric for quantitating the magnitude of immunological or physiological responses. Proteomics could also provide a tool for obtaining valuable information regarding the underlying regulatory mechanisms and pathways in Korean Native Chicken by comparing with subspecies of KNC and other species, like Cornish and White Leghorns.

• The Journal of Korean Medical History
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• v.32 no.2
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• pp.19-27
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• 2019

For the purpose of searching examination in the connection with clinical medicine and the basic theory of Korean Medicine, we comparatively studied on the physiological system of Hyun-Gok (1912~1987) and the Hyunsang system of Ji-San (1927~2000). The results are as follows. The metabolism of Yin and Yang is connected 'Gallbladder (膽)'-'Bladder (膀胱)' and Man (男), Woman (女), Old aged (老), Young child (小) style. Man and Woman are divided in the body form chacteristic not by the sex. 'Gallbladder (膽)'-'Bladder (膀胱)' style are divided in the body form chacteristic by the terms of Yin (陰) and Yang (陽). 'Gallbladder (膽)' style represents excessive Yang and deficient Yin, 'Bladder (膀胱)' style represents excessive Yin and deficient Yang. The four composition factor of the body is connected Material basis (精) type, Vital energy (氣) type, Mental faculties (神) type and Blood (血) type. In the diagnosis of body form on the Hyungsang Medicine, there are several types of body shape and categories of people. The Material basis (精) type, Vital energy (氣) type, Mental faculties (神) type and Blood (血) type are classified by the four composition factor of the body. The structural-mechanics organization of five Internal Organs (臟) is connected five Internal Organs (臟) types and the running-animal (走), bird (鳥), fish (魚), turtle (甲) types in the Hyunsang system. The five Internal Organs (臟) types are percived on the ears, eyes, nose, mouth and facial complexion. And the running-animal, bird, fish, turtle types are accorded to the individual personalities and the most-developed part in the body trunk by the Organ picture (藏象) theory. The six atmospheric influences (六氣) is connected the six Kyung types (六經形). The six Kyung types are regulated by the shape of eyes and nose representing for the relation of Vital energy (氣) and Blood (血). By the comparative study on the physiological system of Hyun-Gok and the Hyunsang system of Ji-San, we can search the connection with clinical medicine and the basic theory of Korean Medicine.

• The Transactions of the Korean Institute of Electrical Engineers D
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• v.52 no.1
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• pp.55-63
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• 2003

In this study was proposed that a new estimating method for investigation of contractile state changes which generated from continuous isometric contraction of skeletal muscle. The physiological changes(EMG, ECG) and the psychological changes by CNS(central nervous system) were measured by experiments, while the muscle of subjects contracted continuously with isometric contraction in constant load. The psychological changes were represented as three-step-change named 'fatigue', 'pain' and 'sick(greatly pain)' from oral test, and the method which compared physiological change with psychological change on basis of these three steps was developed. The result of analyzing the physiological signals, EMG and ECG signal changes were observed at the vicinity of judging point in time of psychological changes. Namely, it is supposed that contractile states have three kind of states pattern (stable, fatigue, pain) instead of two states (stable, fatigue).