• Title/Summary/Keyword: Asymmetry effect

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The Effect of Pelvic Inclination on Gait Elements and Weight Bearing of Healthy Adults

  • Cho, Sung-Hyoun;Kim, Cheol-Yong
    • Journal of International Academy of Physical Therapy Research
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    • v.2 no.2
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    • pp.294-300
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    • 2011
  • The purpose of this study was to investigate the influence of the static pelvic inclination and declination in the static standing position on weight bearing rate and gait elements. Fourteen healthy adults in their twenties were participated. Two groups of healthy adults were allocated in this study: above and below the average of pelvic tilt. The correlation between the pelvic inclination, weight bearing rate and gait elements were measured. There was a statistical correlation between the pelvic tilt and step. Also, there was a statistical difference when we compared anterior declination with swing period and posterior declination with step. There was an asymmetric correlation between pelvic tilt and step. However, there was no statistical difference between the groups above and below the average of pelvic tilt. This result indicates that dipper pelvic inclination doesn't affect the asymmetry of step.

Asymmetric Behavior and Springback of Transformation-Induced Plasticity (TRIP) Steels (TRIP강의 비대칭 거동과 스프링백)

  • Jun, S.;Jung, J.;Lee, H.S.;Kim, B.M.;Kim, J.H.
    • Transactions of Materials Processing
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    • v.26 no.6
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    • pp.333-340
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    • 2017
  • The cyclic hardening behavior of transformation-induced plasticity (TRIP) steels shows tension-compression asymmetry known to be attributed to transformation of retained austenite into martensite during deformation. In this work, YoshidaUemori hardening model was used to represent the asymmetric hardening behavior of TRIP1180 steel. Yoshida-Uemori hardening model parameters were obtained from three sets of data: tension-compression, compression-tension, and a combination of the two. Material models were validated for U-bending and springback.

A Study on the Design of High Efficiency Induction Motor by Grain-oriented Magnetic Cores (방향성 자기재료에 의한 유도전동기의 효율향상설계에 관한 연구)

  • 황영문;이인칠;안진우;박한웅
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.38 no.3
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    • pp.173-181
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    • 1989
  • A split-phase induction motor with asymmetrical magnetizing reactance axes develops starting torque and its efficiency can be high under certain conditions. In this paper, one method of producing the asymmetry of magnetizing reactance axes is described. The grain-oriented silicon steel core is used to produce the asymmetric axes instead of non-oriented silicon steel core which is used in general motors. The optimum design method for the motor is suggested and analyzed. To verify this suggestion, the permanent capacitor run type induction motors are designed to be driven at balanced condition by its asymmetrical effect, and then the oscillating torque due to the asymmetry of motor structures are analyzed. Tests of the sample motor have shown good performance comparable to ordinary types. This motor structure can be used where high effciency and reliability are required, and also the amount of core materials can be reduced due to its high permeability.

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Linkage Between Exchange Rate and Stock Prices: Evidence from Vietnam

  • DANG, Van Cuong;LE, Thi Lanh;NGUYEN, Quang Khai;TRAN, Duc Quang
    • The Journal of Asian Finance, Economics and Business
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    • v.7 no.12
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    • pp.95-107
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    • 2020
  • The study investigates the asymmetric effect of exchange rate changes on stock prices in Vietnam. We use the nonlinear autoregressive-distributed lag (ARDL) analysis for monthly data from 2001:01 to 2018:05, based on VN-Index stock price collected from Ho Chi Minh Stock Exchange (HOSE); the nominal exchange rate is separated into currency depreciation and appreciation through a partial sum decomposition process. Asymmetry is estimated both in the long-run relationship and the short-run error correction mechanism. The research results show that the effect of exchange rate changes on stock prices is asymmetrical, both in the short run and in long run. Accordingly, the stock prices react to different levels to depreciation and appreciation. However, the currency appreciation affects a stronger transmission of stock prices when compared to the long-run currency depreciation. In the absence of asymmetry, the exchange rate only has a short-run impact on stock prices. This implies a symmetrical assumption that underestimates the impact of exchange rate changes on stock prices in Vietnam. This study points to an important implication for regulators in Vietnam. They should consider the relationship between exchange rate changes and stock prices in both the long run and the short run to manage the stock and foreign exchange market.

Effect of Acupuncture on 6-Hydroxydopamine-induced Nigrostriatal Dopaminergic Neuronal Cell Death in Rats

  • Kim, Yeung-Kee;Song, Yun-Kyung;Lim, Hyung-Ho
    • The Journal of Korean Medicine
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    • v.26 no.4
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    • pp.98-107
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    • 2005
  • Objectives: Acupuncture treatment has been clinically used for functional recovery in Parkinson's disease. In the present study, we investigated the effect of acupuncture at Zusanli (ST36) on nigrostriatal dopaminergic neuronal cell death in rats. Methods: A Parkinson's disease model was induced by the unilateral injection of 6-hydroxydopamine (6-OHDA) into the striatum. Acupuncture treatment was performed at Zusanli (ST36) and at the hip, as a non-acupoint, once a day for 14 days. Two weeks after 6-0HDA injection, an apomorphine-induced rotational behavior test showed significant rotational asymmetry in rats with Parkinson's disease. Immunostaining for tyrosine hydroxylase demonstrated a dopaminergic neuronal loss in the substantia nigra and dopaminergic fiber loss in the striatum. Results: Acupuncture at the ST36 acupoint significantly inhibited rotational asymmetry in rats with Parkinson's disease, and also protected against 6-OHDA-induced nigrostriatal dopaminergic neuronal loss. These effects of acupuncture were not observed for non-acupoint acupuncture. Conclusions: The present study shows that acupuncture treatment, especially at the ST36 acupoint, can be used as a useful strategy for the treatment of Parkinson's disease.

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Corporate Social Responsibility and Unsecured Debt: Evidence from China

  • CHEN, Xia;MA, Zhe;SHI, Jiayu;TU, Bingyan;XU, Songtao
    • The Journal of Asian Finance, Economics and Business
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    • v.7 no.11
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    • pp.1-11
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    • 2020
  • This study aims to investigate whether Corporate Social Responsibility (CSR) performance can help companies gain more bank unsecured loans. Additionally, this study analyzes the moderating effect of firm size and industry characteristics. Data was collected through the case of companies listed on the Shanghai Stock Exchange or the Shenzhen Stock Exchange in China between 2009 and 2018 with 5373 firm-year observations. The results of multivariable regression analysis show that good CSR performance exhibits a strong positive impact on unsecured debt, including short-term, long-term, and total unsecured debt, which indicates that corporate with good CSR performance can borrow more unsecured debt. further research shows that this effect is more pronounced for small enterprises and firms operating in heavy-polluting industries. Additionally, research on the impact mechanism finds that good CSR performance can help mitigate information asymmetry between borrower and lender, reduce moral hazard of borrower, and obtain support from key stakeholders, and therefore reduces the risk of default. The findings of this study suggest that firms with good CSR performance exhibit a preference for unsecured debt, but decline to provide collateral for debt. Overall, we emphasize and illustrate the important role of corporate CSR in bank credit financing.

Analysis of Influence for Breach Flow According to Asymmetry of Breach Cross-section (제방붕괴 형상의 비대칭성에 따른 붕괴흐름의 영향 분석)

  • Kim, Sooyoung;Choi, Seo-hye;Lee, Seung Oh
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.5
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    • pp.557-565
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    • 2016
  • The risk of collapse in hydraulic structures has become more elevated, due to the increased probability and scale of flooding caused by global warming and the resulting abnormal climatic conditions. When a levee, a typical hydraulic structure, breaks, an enormous breach flow pours into the floodplain and much flood damage then occurs. It is important to accurately calculate the breach discharge in order to predict this damage. In this study, the variation of the breach discharge with the asymmetry in the cross-section of the levee breach was analyzed. Through hydraulic experiments, the cross-section of the breach was analyzed during the collapse using the BASD (Bilateral ASymmetry Degree), which was developed to measure the degree of asymmetry. The relationship of the breach discharge was identified using the BASD. Additionally, the variation of the breach flow measured by the BASD was investigated through a 3-D numerical analysis under the same flow conditions as those in the experiment. It was found that the assumption of a rectangular breach cross-section, which is generally used for the estimation of the inundation area, can cause the breach discharge to be overestimated. According to the BASD, the breach flow is decreased by the interference effect in the breach section of the levee. If the breach flow is calculated while considering the BASD in the numerical analysis of the flooding, it is expected that the predicted inundation area can be estimated accurately.

The Effect of The Forward Head Posture on The Maximum Mouth Opening of The Temporomandibular Joint, The Muscle Activity and The Asymmetry Rate of The Temporalis and Masseter (머리전방자세가 턱관절의 최대 개구량과 관자근 및 깨물근의 근활성도와 비대칭률에 미치는 영향)

  • Yang, Yong-Pil;Seo, Dong-yel
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.22 no.3
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    • pp.291-296
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    • 2021
  • This study examined the effects of the forward head posture on the maximum mouth opening of the jaw joint and the muscle activity and asymmetry of the temporalis and masseter. The craniovertebral angle was measured in 50 subjects (23.10±2.73 years) who met the selection requirements of the study. The maximum mouth opening, muscle activity, and muscle asymmetry were measured by reducing 0%, 10%, and 20%. As the craniovertebral angle decreased, the maximum mouth opening decreased (p<.001), the muscle activity of the right and left temporalis decreased (p<.001), and the muscle activity of the left temporalis also decreased. (p<.01). The asymmetry rate of the added muscles of the left and right temporalis, left and right temporalis, and masseter increased according to the change in condition (p<.01). The results of this study are expected to help establish a treatment strategy and comprehensive diagnosis for the temporomandibular joint and present a theoretical basis of manual therapy and therapeutic exercises used for the treatment of TMD.

The Role of Information Search Cost on Seller's Disclosure of Negative Information (정보 검색 비용이 판매자의 부정적 정보 공개에 미치는 영향에 대한 연구)

  • Huh, Seung
    • Journal of Convergence for Information Technology
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    • v.11 no.4
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    • pp.230-241
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    • 2021
  • This study has attempted to provide an important understanding about the information asymmetry in markets through empirical analysis on how the disclosure of low quality can increase demand even in the short run. More specifically, this study has extended the previous findings from the related literature by considering the effect of information search cost and providing empirical evidences about the effect of voluntary disclosure of low quality, using an experimental method with purchase scenarios. The results from our analysis show that reduced perceived risk have an important effect on sharing negative information, while the effect of information search cost is minimal. We also explain the circumstances whereby the information disclosure of a seller with low-quality product can enhance not only the seller's profitability but also customers' welfare by increasing the market demand and the demand for the seller claiming high quality.

The Impact of An Interaction between Product Quality and Perceived Risk on Seller Profit

  • Seung HUH
    • The Journal of Economics, Marketing and Management
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    • v.11 no.2
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    • pp.23-32
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    • 2023
  • Purpose: This study examines the effect of full information disclosure on seller profit when there exists information asymmetry between sellers and buyers, focusing on the risk averseness of buyers. By investigating the interaction between product quality and perceived risk through online sales data, we attempt to figure out the incentive structure of full information disclosure specifically when buyers are risk-averse, so that we can suggest more feasible information disclosure strategy to sellers. Research design, data and methodology: Our empirical model analyzes the sales data of collectible goods from a major online seller using Poisson regression. In our model, we have specifically considered risk-averseness of buyers by estimating the interaction effect between the product quality and perceived risk on seller profit, aiming for a more precise empirical analysis on sellers' incentive structure of full disclosure. Results: Our empirical analysis strongly supports the effect of interaction between product quality and perceived risk, showing that the incentive for full disclosure is much stronger when product quality is higher, and vice versa. Therefore, sellers are strongly encouraged to voluntarily reveal product weaknesses when their product quality is higher than average, while it is more profitable to hide any product defects when quality claim is lower than average. Conclusions: This study supports the related literature by confirming economic incentives for full disclosure, and also supplements and strengthens previous studies by presenting that the effect of interaction between product quality and perceived risk strongly affects seller profit. Our unique finding supports both mandatory disclosure and voluntary disclosure arguments and presents practical implications to marketing managers by suggesting that seller's incentive for revealing weaknesses depends on the level of seller's product quality.