Yeoju, South Korea
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Kim K.-S.,Korea Electric Power Research Institute | An G.-H.,KAIST | Kim J.-K.,KAIST | Lee K.,Yeoju Institute of Technology
Computers and Concrete | Year: 2016

An anchorage system is essential for most reinforced concrete structures to connect attachments. Prediction of strength of the anchor is very important issue for safety of the structures. Existing design codes are not applicable for large anchors because they are based on the small size anchors with diameters under 50mm. In this paper, a new prediction model for strength of anchors, especially the tensile strength of anchors, is developed from experimental results with consideration of size effect. New model is proposed by regression analysis of experimental results and it can reasonably predict the tensile strength of both small and large anchors. Copyright © 2016 Techno-Press, Ltd.


Kim H.J.,Yeoju Institute of Technology | Cho M.-T.,Korea University | Kim K.-S.,Aaia Cement Co
Lecture Notes in Electrical Engineering | Year: 2016

In this paper, a boost chopper using PV (Photovoltaics) system and PWM (Pulse Width Modulation) voltage type power converter were constructed to provide a pleasant environment to the patients in the hospital wards by controlling temperature, humidity and air-conditioning and heating. For the stable modulation of solar cell, synchronizing signal and control signal were processed using one chip microprocessor. In this thesis, in addition, grid voltage was detected and this grid voltage and inverter output were operated at the same phase for the phase locking with PWM voltage source inverter so that surplus power could be linked to grid. This characteristic were applied on the temperature and humidity sensors in the general buildings and buildings having specific purposes such as hospitals. The good dynamic characteristic of inverter could be obtained by these applications. Also, PWM voltage inverter maintains a high power factor and low-frequency harmonic output so that power can be supplied in the load as well as system. © Springer Science+Business Media Singapore 2016.


Bae S.,Konkuk University | Lee E.-M.,Konkuk University | Cha H.J.,Konkuk University | Kim K.,Konkuk University | And 8 more authors.
Molecules and Cells | Year: 2011

Resveratrol is a plant phenolic phytoalexin that has been reported to have antitumor properties in several types of cancers. In particular, several studies have suggested that resveratrol exerts antiproliferative effects against A549 human non-small cell lung cancer cells; however, its mechanism of action remains incompletely understood. Deregulation of microRNAs (miRNAs), a class of small, noncoding, regulatory RNA molecules involved in gene expression, is strongly correlated with lung cancer. In this study, we demonstrated that resveratrol treatment altered miRNA expression in A549 cells. Using microarray analysis, we identified 71 miRNAs exhibiting greater than 2-fold expression changes in resveratrol-treated cells relative to their expression levels in untreated cells. Furthermore, we identified target genes related to apoptosis, cell cycle regulation, cell proliferation, and differentiation using a miRNA target-prediction program. In conclusion, our data demonstrate that resveratrol induces considerable changes in the miRNA expression profiles of A549 cells, suggesting a novel approach for studying the anticancer mechanisms of resveratrol. © 2011 KSMCB.


Choi D.-S.,Chungwoon University | An J.-H.,University of Suwon | Do J.-S.,Yeoju Institute of Technology
International Journal of Smart Home | Year: 2016

In this study, indoor illuminance and daylight distribution compared to the generation performance of PV window system are experimented and analyzed in accordance with the types of silicon (crystalline, amorphous). According to the analysis of generation quantity during the measurement period, when solar radiation is 138.1kW, daily maximum generation quantity is 27.4kW (19.8% of efficiency) for crystalline PV window system, and 5.8kW (4.1% of efficiency) for amorphous PV window system. In addition, according to analysis of indoor illuminance and daylight distribution, the illuminance of 500lx is secured from all measuring points, and in the case of daylight factor, more than 1.5% of minimum standard (BS 8206-2) is indicated. Therefore, it is analyzed that the lighting performance required by residential environment is satisfied by crystalline as well as amorphous PV window system. However, in the case of illuminance uniformity, crystalline PV window system are analyzed to be 10.5% lower for the measuring height of 400mm and 48.6% lower for the measuring height of 850mm compared to the amorphous PV door and window system. © 2016 SERSC.


PubMed | Korea University, Yeoju Institute of Technology and Pohang College
Type: Journal Article | Journal: Journal of physical therapy science | Year: 2015

[Purpose] This study aimed to examine the effects of neuromuscular electrical stimulation on masticatory muscle activation in elderly stroke patients. [Subjects and Methods] The subjects included 20 elderly patients diagnosed with stroke and 10 healthy elderly individuals. The neuromuscular electrical stimulation group received stimulation on the masseter muscle in the affected side for 30min each day, 3 times per week for 8 weeks. In all the subjects, surface electromyography was used to measure activity of the masseter and temporal muscles in both sides under resting and clenching conditions. [Results] In the neuromuscular electrical stimulation group, after the intervention, an increase in the activity of all of the masticatory muscles was observed during clenching, with a significant increase in the activity of the masseter muscle in the affected side. Significant differences between the groups were not observed after the interventions. [Conclusion] The results of this study suggest that application of neuromuscular electrical stimulation effectively improves muscle activity in elderly stroke patients during clenching, and that this technique can be applied particularly for the improvement of the clenching activity of the masseter muscle in the affected side.


PubMed | Yeoju Institute of Technology and Sahmyook University
Type: Journal Article | Journal: Journal of Korean Academy of Nursing | Year: 2015

The purpose of this study was to develop an instrument to measure the parenting behavior of primary caregivers of children in early childhood.An instrument was developed according to Develliss instrument development process. The participants in this study who completed the main survey were 370 mothers and grandmothers. The survey was conducted from June 1 to July 30, 2014, and collected data were analyzed using item analysis, half-split reliability and Cronbachs alpha coefficient, exploratory and confirmatory factor analysis, convergent validity.The factor structure of the instrument showed the cumulative variance as 55.7% in the factor analysis. As a result of a confirmatory factor analysis, a four-factor structure was found to be appropriate, and the construct validity and convergent validity of the instrument were thereby confirmed. The finalized parenting behavior instrument consisted of 26 items and four independent factors: affectionate, laissez-faire, educational and impulsive. A five-point Likert scale was employed, and a higher score in a particular factor showed that most of the behaviors belonged to the factor.The instrument developed in this study was found to be reliable and valid, and can be used to develop parent-child relationship building.


PubMed | Yeoju Institute of Technology
Type: Journal Article | Journal: Journal of physical therapy science | Year: 2016

[Purpose] This study aimed to investigate the relationship between balance function and community participation in stroke survivors. [Subjects and Methods] Sixty-three patients diagnosed with hemiparetic stroke participated in this study (36 males, 27 females, aged 58.6 15.2years). The participants were assessed for balance function and their level of participation in the community, using activity card sorting and the Berg Balance Scale. A regression analysis was used to identify the influence of balance function on instrumental activities of daily living and leisure and social activities. [Results] The results of the regression analysis indicated that balance function measured by using the Berg Balance Scale affected community participation of patients with hemiparetic stroke. Participation in instrumental activities of daily living and leisure and social activities was affected by balance function. [Conclusion] This study provides useful information for designing efficient programs and identifying their effectiveness for enhancement of community participation in stroke survivors.


PubMed | Yeoju Institute of Technology
Type: Review | Journal: Journal of physical therapy science | Year: 2016

[Purpose] The purpose of this study was to analyze approaches and interventions with occupational performance in patients with stroke. [Subjects and Methods] In this study, articles published in the past 10years were searched. The key terms used were occupational performance AND stroke and occupational performance AND CVA. A total 252 articles were identified, and 79 articles were selected. All interventions were classified according to their approaches according to 6 theories. All interventions were analyzed for frequency. [Results] Regarding the approaches, there were 25 articles for studies that provided high frequency interventions aimed at improving biomechanical approaches (31.6%). This included electrical stimulation therapy, robot therapy, and sensory stimulation training, as well as others. Analysis of the frequency of interventions revealed that the most commonly used interventions, which were used in 18 articles (22.8%), made use of the concept of constraint-induced therapy. [Conclusion] The results of this study suggest an approach for use in clinics for selecting an appropriate intervention for occupational performance.


PubMed | Howon University, Yeoju Institute of Technology and Namseoul University
Type: Journal Article | Journal: Journal of physical therapy science | Year: 2016

[Purpose] This study aimed to examine the immediate effects of kinematic taping on the tone and stiffness in the leg muscles of subjects with flexible flat feet. [Subjects and Methods] A total of 30 subjects, 15 in the kinematic taping and 15 in the sham taping group, were administered respective taping interventions. Subsequently, the foot pressure and the tone and stiffness in the tibialis anterior, rectus femoris, medial gastrocnemius, and the long head of the biceps femoris muscles of both the lower extremities were measured. [Results] The foot pressure of the dominant leg significantly decreased in the kinematic taping group. The muscle tone and stiffness in the rectus femoris muscle of the dominant and non-dominant leg, tibialis anterior muscle of the dominant leg, medial gastrocnemius muscle of the non-dominant leg, and the stiffness in the dominant leg significantly decreased. The muscle tone and stiffness generally increased in the sham taping group. However, no significant difference was observed between the 2 groups. [Conclusion] This study demonstrated that kinematic taping on flexible flat feet had positive effects of immediately reducing the abnormally increased foot pressure and the tone and stiffness in the lower extremity muscles.


PubMed | Korea University and Yeoju Institute of Technology
Type: Journal Article | Journal: Journal of physical therapy science | Year: 2016

[Purpose] The aim of the present study is to examine the effects of silver spike point therapy on elderly persons chronic constipation. [Subjects and Methods] The subjects of the present study were 30 elderly chronic-constipation sufferers who resided in a nursing home and had other physical conditions that necessitated wheelchair ambulation. There were three test groups in the present study: an silver spike point group, an acupuncture group, and a control group; 10 subjects were assigned to each group. The silver spike point group and the acupuncture group received their respective interventions, which were applied to both sides of the Tiensu for 20 minutes per day, five days per week, over a four week period. Weekly bowel movement frequency was recorded, and the Constipation Assessment Scale and Bowel Function Assessment Form were used as data-gathering instruments. [Results] Following treatment, the silver spike point and acupuncture groups showed significant improvement, based on the Constipation Assessment Scale and the Bowel Function Assessment Form, compared with the control group. [Conclusion] Based on the above results, silver spike point therapy can be administered to alleviate chronic constipation in elderly nursing home residents who cannot walk independently due to declining physical functions.

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