• Journal of Distribution Science
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• v.15 no.10
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• pp.5-14
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• 2017

Purpose - This research aims to find the moderation roles of power states in the effects of four message types (competence self-referencing, competence self-defining, warmth self-referencing, warmth self-defining) on brand attitude. Research design, data, and methodology - A restaurant brand was used as an experimental object, and 4(message types: warmth self-defining message, warmth self-referencing message, competence self-defining message, competence self-referencing message) × 2(power: high power and low power) between-subjects design was employed. Through on-line survey in Nepal, we collected a total of 240 individuals composed of eight experimental groups with 30 members in Nepal. Results - Consumers under low power state formed more positive brand attitude at the warmth self-defining message than any other types of message, while under high power condition, there are neither the attitude differences between competence self-referencing message and competence self-defining message, nor those between competence self-referencing message and warm self-defining message. The significant attitude differences showed between competence self-referencing message and warmth self-referencing message. Conclusions - This study contributes to the advertising theory development. Restaurant store marketers should deliver warmth self-defining message rather than the other three types of message to consumers under low power state, and they should not deliver warmth self-referencing message to consumers under high power state.

• Journal of the Korean Society of Industry Convergence
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• v.24 no.4_1
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• pp.387-395
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• 2021

Distributed resources such as renewable energy sources and ESS are connected to the low voltage direct current(LVDC) distribution network through the power conversion system(PCS). Control power is required for the operation of the PCS. In general, controller power is supplied from AC power or DC power through switch mode power supply(SMPS). However, the conventional SMPS has a low input voltage, so development and research on high input voltage self-power suitable for LVDC is insufficient. In this paper, to develop Self-Power that can be used for LVDC, the characteristics of the conventional topology are analyzed, and a series-input single-output flyback converter using a flux-sharing transformer for high voltage is designed. The high input voltage Self-Power was designed in the DCM(discontinuous current mode) to reduce the switching loss and solve the problem of current dissipation. In addition, since it operates even at low input voltage, it can be applied to many applications as well as LVDC. The validity of the proposed high input voltage self-power is verified through experiments.

• Journal of Korean society of Dental Hygiene
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• v.5 no.1
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• pp.77-88
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• 2005

The purpose of this study was to investigate the relationship of power and empowerment, self-efficacy of dental hygienists. Date were obtained from 203 dental hygienists who were working at dental clinics, hospitals located in Seoul. The results were analyzed with spsswin 12.0 and the conclusion is as follows: 1. The level of dental hygienists formal power was 3.19, informal power was 3.41, empowerment was 3.12, self-efficacy was 3.67. 2. Formal power showed significant a positive correlation with informal power and informal power showed significant a positive correlation with empowerment 3. According to the position, there were significant differences in formal power(pE0.05). 4. According to the working place, age, experienced-years, position, marriage and turnover experience there were significant differences in informal power(pE0.05). S. According to the working place, position, and marriage there were significant differences in empowerment(pE0.05). 6. According to the age, experienced-years, position, marriage and turnover experience there were significant differences in self-efficacy(pE0.05). 7. Informal power and information structure accounted significantly for the self-efficacy.

• Journal of IKEEE
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• v.22 no.3
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• pp.548-557
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• 2018

In this paper, Asynchronous Self-Power Gating technique (ASPG) is used to reduce consumption power in asynchronous digital watch application. The power gating control signal is automatically generated by internal system operation characteristics instead of using replica circuit delay or four-phase handshaking protocol. Isolation cell is designed to insert it between power gating domain and normal operation domain. By using self-power gating circuit, asynchronous digital watch application consumes very low power and maintains data during sleep mode. The comparison results show the proposed ASPG technique saves leakage power up to 40.47% and delay time is reduced to 71% compared to the conventional circuit.

• Journal of Fisheries and Marine Sciences Education
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• v.27 no.4
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• pp.998-1012
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• 2015

This study is smartphone addiction impulsiveness, stress, self-efficacy, and examine any changes to appear self-control. This study is a response to the results obtained for 310 people targeting high school in Pusan, the second grade students. For the analysis of the collected data by using the SPSS 22.0 program was the analysis of the T-test, ANOVA, Multiple Regression. The major findings of this study can be summed up as follows: first, smart phone addiction has significant difference in impulsivity, stress, self-efficacy, and self-control. Second, sex is found to be significant in impulsivity, stress, self-efficacy, and self-control. Third, grades are significant in impulsivity, self-efficacy, and self-control. Fourth, the model for impulsivity indicates 4% of explanatory power, which is significant. Fifth, explanatory power for stress is 4%, which is significant. Sixth, the model for self-efficacy shows 14% of explanatory power, which is significant. Meanwhile, smart phone addiction, sex, and grades have no significant effects on self-efficacy. Seventh, the model for self-control indicates 20% of explanatory power, which is significant.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.589-590
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• 2013

The fast development of electronic devices towards wireless, portable and multi-functionality desperately needs the self-powered and low maintenance power sources. The possibility to coupling the nanogenerator to wearable and portable electronic device facilitates the self powered device with independent and self sustained power source. Nanogenerator has ability to convert the low frequency mechanical vibration to electrical energy which is utilized to drive the electronic device [1]. The self powered power source has the ability to generate the power from environment and human activity has attracted much interest because of place and time independent. The human body motion based energy harvesting has created huge impact for future self powered electronics device applications. The power generated from the human body motion is enough to operate the future electronic devices. The energy harvesting from human body motion based on triboelectric effect has simple, cost-effective method [2, 3] and meet the required power density of devices. However, its output is still insufficient to driving electronic devices in continues manner so new technology and new device architecture required to meet required power. In the present work, we have fabricated the triboelectric nanogenerator using PDMS polymer. We have studied detail about the power output of the device with respect to different polymer thickness and varied separation distance.

• Current Photovoltaic Research
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• v.11 no.4
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• pp.134-143
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• 2023

Efforts are being made to respond to global warming. Interest in and demand for the private sector-led RE100 campaign is also increasing. Self-built solar power generation, one of the implementation tools for RE100, is not expanding. However, it can be an economical means of implementation in the long run. In this study, we intend to analyze the impact on the optimal ratio of self-solar power generation using HOMER simulation. OPR defines the optimal solar power generation ratio and looks into what changes there are in the optimal solar power ratio when self-power consumption increases and external power purchase price changes. As a result, the optimal rate of self-solar power generation has a low impact even if self-power consumption increases. As the external power unit price increases, the optimal ratio increases, and at a power unit price of 100 KRW/kWh, OPR is 24%; at 200 KRW/kWh OPR is 31%; and at 300 KRW/kWh OPR is 34%. This shows that the electricity price replaced during the life cycle has a high impact on the economic feasibility of solar power generation. However, when the external power unit price reached a certain level, the increase in OPR decreased. This shows that it is difficult for domestic companies to achieve RE100 based on the economic feasibility of solar energy alone. Therefore, efforts are needed to supply renewable energy in the public sector.

• KEPCO Journal on Electric Power and Energy
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• v.7 no.2
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• pp.295-299
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• 2021

Recently, interest in maintenance has been increasing due to the enlargement and aging of infra structures. Therefore, a new paradigm is required to secure and improve the durability of structures differentiated from the past. Accordingly, research on smart concrete incorporating the concept of self-healing into concrete is being actively conducted. In this study, the crack healing performance and durability performance of self-healing concrete applied with a hydrogel containing biomineral-forming microorganisms were evaluated. As a result of evaluating the dispersion of the hydrogel in concrete, it was confirmed that the hydrogel was well distributed in concrete matrix with a dispersion coefficient of 0.35 to 0.46. The crack healing performance evaluation was verified by a water permeability test, and showed a recovery rate of 95% or more at the age of 28 days, confirming the applicability of self-healing concrete. The durability performance of self-healing concrete was evaluated in terms of resistance to penetration of chloride ion and freezing and thawing. Regardless of the mixing of the hydrogel, the same level of durability performance was shown for various compressive strength level. Therefore, it was confirmed that the microbial admixture did not affect concrete durability. In the future, long-term crack healing performance and durability verification studies should be supplemented.

• 한국정보통신설비학회:학술대회논문집
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• 2009.08a
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• pp.349-352
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• 2009

WBAN/USN systems are applied from the various environment. Therefore, it is coming to be important efficient use power and communication method. The present paper materialize Slave node system which get power from light energy. Also, it materialize Wake-up module and self-power-off circuit which use S-R Flip Flop for efficient using power. This system can be efficient using power at Slave node system. Also, it can be possible application of Self sustaining system by performance verification Wake-up module which determine system "on" without power and Self-power-off circuit.

• The Transactions of the Korean Institute of Power Electronics
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• v.15 no.1
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• pp.1-8
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• 2010

This paper presents the self-oscillating flyback converter for reducing standby power without a control-IC. The proposed self-oscillating flyback converter includes a DC-Blocking capacitor for reducing constant power loss of initial switching path of a conventional self-oscillating flyback converter. it's possible to reduce the standby power to 1W and power efficiency. To confirm the validity of proposed system, comparison of conventional system, verification of experimental results is presented by realization of 35W power system.