• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.1489-1490
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• 2011

• Fashion & Textile Research Journal
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• v.22 no.5
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• pp.676-685
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• 2020

This study developed smart vests with heat and massage functions that changed patterns, designs, materials, etc., and evaluated their functions and satisfaction. A knitted fabric with good elasticity and a heating lining were used, and in consideration of this, the final vest pattern fitted to the upper body was completed. A heat pad was attached to the back, and 6 vibration motors were attached to the trapezius muscle. The controller was placed on the left chest for easy operation, and the battery was stored in an inner pocket under the controller. The heating effect of the smart vest, the location of the devices, and the ease of operation were excellent. When the massage function was operated, the thermal comfort was increased compared to when the massage function was not operated, and the high thermal comfort was perceived by the operation of heat and heat+massage function. Due to the battery, the weight, irritating contact of devices and wearing sensation decreased, but there was no reduction in wearing sensation due to heat and vibration devices. The greater the satisfaction with the massage function, thermal comfort, fit, appearance and weight, the greater the product satisfaction.

• Journal of Advanced Navigation Technology
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• v.13 no.6
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• pp.926-932
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• 2009

The whole-body massager among healthcare devices is under being popularized in a large scale as times goes by. It is critical to measure, analyze and judge the stress relaxsation trend from HRV signal using PPG in case of massager operation with such relaxsation device for removing stress of human being. There may be artifact in HRV measured signal because the measured object is under shaking with that massager in this case. We present the methodology to remove such artifact from those measured HRV signal, and then measure and analyze the desired HRV successfully in this paper.

• The Journal of Korean Obstetrics and Gynecology
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• v.31 no.2
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• pp.80-94
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• 2018

Objectives: The purpose of this study was to investigate the effect of the massage program stimulating the acupuncture points and meridians on the improvement of sleep quality. Methods: 16 subjects suffering from sleep disorders were recruited and the massage program was conducted 3 times a week for a month. VAS (Visual Analog Scale) and KPSQI (Korean Pittsburgh Sleep Quality Index) were collected through questionnaires, and salivary cortisol concentration test and HRV (Heart Rate Variability) were also used to evaluate the effect. The collected data were analyzed by independent statisticians. Results: VAS and KPSQI values decreased significantly after 4 weeks of massage chair application. There was no significant difference in salivary cortisol concentration and HRV test results. In the group with normal HRV test results and salivary cortisol concentration, the change of VAS and KPSQI values was not significant, while the group with abnormal range showed a statistically significant decrease. Conclusions: The massage chair program stimulating meridians according to Korean medicine theory was effective in improving sleep quality. Massage of acupoints and meridians through a massage chair is expected to be useful as an adjunctive therapy in addition to standard Korean medicine therapy.

• Journal of the Korean Society for Precision Engineering
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• v.27 no.6
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• pp.75-81
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• 2010

The purpose of this study was to investigate the short-term effects of electrical massager on stress-related parameters including heart rate variability (HRV), heart rate (HR) using the photoplethysmogram (PPG) signal with motion artifact correction. Twenty healthy subjects were randomly allocated to receive a 15-min section of three types ((1) resting mode (control group), (2) light massage mode, (3) strong massage mode). Results indicated that self-report, VAS (Visual Analog Scale) significantly decreased for two massage modes after massage except control group. In strong massage mode, it was associated with significant increases in HF, but significant decreases in LF and LH/HF ratio compared with the light massage mode. For all outcomes, similar changes were not observed in the control group. Also, the result founded that mean HR of all groups decrease. We conclude that electrical massager reduces perceived stress and improves adaptive autonomic response to stress in healthy adults.

• Korean Journal of Environmental Biology
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• v.40 no.1
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• pp.70-86
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• 2022

A survey was conducted to analyze seasonal dynamics of the phytoplankton community at 22 stations on the surface and bottom layers in the Anma Islands of Yeonggwang(AIY) in the southern West Sea, Korea from the spring of 2020 to the winter of 2021, using a marine survey vessel Ed Ocean. Based on the survey results, there were 87 phytoplankton species in 52 genera, diatoms accounted for 67.8%, dinoflagellates 26.5%, silicoflagellates 3.5%, and cryptomonads and euglenoids accounted for 1.1% each. By season, it was simple in spring and relatively varied in winter. The phytoplankton standing crop on the surface was low (28.8±30.1 cells mL^-1) in summer and high (87.0±65.1 cells mL^-1) in spring. In the phytoplankton community, diatoms showed a high share (over 80%) throughout the year, and Skeletonema costatum-ls was the dominant species with a dominance of more than 60% in spring and winter, and 34.6% and 24.2% in summer and autumn, respectively. The diversity expressing the characteristics of the community structure was high (2.79±0.45) in autumn and low (1.82±0.18) in spring, unlike the phytoplankton standing crop. However, the dominance was high at (0.86±0.08) in spring and low (0.44j0.13) in autumn. Based on the results of principal component analysis (PCA) using environmental and phytoplankton-related factors, it was estimated that the biological oceanographic environmental characteristics seen through the phytoplankton community in the AIY were dominated by nutrients supplied from open seawater and surface sediments by seawater mixing, such as tidal mixing.

• Vending industry
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• v.7 no.1 s.19
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• pp.80-81
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• 2007

미래C&B가 최근 다양한 이이템들은 시장에 선보이며 업계에 주목을 받고 있다. 중소기업 기반이 취약해져 신규아이템에 대한 투자의지가 전반적으로 위축되었기 때문일까. 공격적인 제품 마케팅 정책을 펼치는 미래C&B의 최근 행보는 단연 두드러져 보인다. 이런 미래C&B에서 최근 웰빙 관련 자판기를 출시했다. 기존 안마자판기 시장의 대체수요를 겨냥하고 개발한 웰빙 캡슐 $O^2$ZONE이 바로 그 것. 뛰어난 제품 성능으로 무장한 이 자판기가 과연 얼마만큼 시장 반향을 불러일으킬지가 큰 관심사이다. 캡슐 $O^2$ZONE을 중심으로 미래C&B의 최근 사업행보를 살펴봤다.

• Korean Architects
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• s.628
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• pp.66-71
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• 2021

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.6
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• pp.2292-2299
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• 2010

The wear and abrasion mechanism of conventional PET/Cotton fabric which is used as a lining layer for thermotherapy massager was elaborately investigated in order to increase the life-span of the fabrics for Thermotherapy Massager. Based on the destruction mechanism, the feasible PET fabrics were prepared and its anti-wearing performance was evaluated. It is revealed that the wearing destruction is mainly caused by the repeat abrasion on a specific part of folded fabric as well as abrasion itself. Therefore, it is necessary that the prevention of fabric folding while massager is running is essential and the recovery from the crease on a fabric is also necessary to solve this problem. Covered elastic yarn, high twisted yarn, change of fabric structure or different fiber were utilized to prepare the possible alternatives. As a result, the anti-wearing performance of the fabrics are greatly improved to have about 2 times and 1.5 times longer life-span for the fabric with covered elastic yarn and high twisted yarn, respectively.

• Journal of The Korean Digital Architecture Interior Association
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• v.6 no.2
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• pp.39-46
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• 2006

"Urban traditional housing" means a type of urban housing which retains characteristics of traditional Korean houses for ordinary people. It is a form of housing created in the process in which traditional Korean ways of life are applied to swift modernization. In Korea's traditional housing, the "court" functioned as a living space that promoted family bonding. The space of the court still remains in the urban traditional housing. However, rapid popularization of the westernized housing form, i.e., apartments, resulted in standardization and westernization of our housing and living patterns, and as a result, the court in urban traditional housing came to lose its original meaning. The objects of this study are residents of urban traditional housing. By studying them, this research aims, firstly, to understand the meaning of the inner court, secondly to analyze correlation between the residents' consciousness of the inner court and their use of the space, and ultimately to find various possible forms of our future housing. For this research, twenty six houses in the Gahoe-dong area in which urban traditional houses are densely built up were investigated. According to the result of this research, the inner court in current urban traditional housing is a space existing inside a house but directly exposed to outer air at the same time. It is a private but shared space. It contributes to forming a pleasant atmosphere by facilitating ventilation and providing sunlight. In addition, it is a living space that actively reflects the Korean living style that values family life.