• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.37 no.8
• /
• pp.961-966
• /
• 2013

A coupled governing equation of thermoelectric materials can be converted into an uncoupled form to predict the effective Seebeck coefficient of thermoelectric composites, where modified Eshelby model is adopted. The predicted results by the present approach for serial- and parallel-connected composites and composite with spherical inclusions are compared with theoretical and experimental results from literatures to be justified. It is shown that the predictions by the theoretical approaches coincide exactly and show in good agreement with the experiments.

• Journal of the Korean Mathematical Society
• /
• v.38 no.3
• /
• pp.595-611
• /
• 2001

Let Q(n,1) be the set of even unimodular positive definite integral quadratic forms in n-variables. Then n is divisible by 8. For A[X] in Q(n,1), the theta series $\theta$(sub)A(z) = ∑(sub)X∈Z(sup)n e(sup)$\pi$izA[X] (Z∈h (※Equations, See Full-text) the complex upper half plane) is a modular form of weight n/2 for the congruence group Γ$_1$(8) = {$\delta$∈SL$_2$(Z)│$\delta$≡()mod 8} (※Equation, See Full-text). If n$\geq$24 and A[X], B{X} are tow quadratic forms in Q(n,1), the quotient $\theta$(sub)A(z)/$\theta$(sub)B(z) is a modular function for Γ$_1$(8). Since we identify the field of modular functions for Γ$_1$(8) with the function field K(X$_1$(8)) of the modular curve X$_1$(8) = Γ$_1$(8)＼h(sup)* (h(sup)* the extended plane of h) with genus 0, we can express it as a rational function of j(sub) 1,8 over C which is a field generator of K(X$_1$(8)) and defined by j(sub)1,8(z) = $\theta$$_3$(2z)/$\theta$$_3$(4z). Here, $\theta$$_3$ is the classical Jacobi theta series.

• Journal of Distribution Science
• /
• v.12 no.1
• /
• pp.21-28
• /
• 2014

Purpose - This study aims to examine the Indian consumers'mall shopping patronage with the application of theory of planned behavior (TPB). The research intends to extend the TPB components (attitude, self-efficacy, subjective norms) with the addition of self-image and study their effect on Indian consumers' mall patronage intention. Research design, data and methodology - The research employed factor analysis to verify correct loading of items on corresponding factors and to confirm the applicability of constructs in the Indian context. The model was tested using stepwise regression analysis. Results -The results indicate a positive relationship between self-efficacy and intention to mall patronage. The findings show that self-image, attitude, self-efficacy, subjective norm significantly influence the mall patronage intention. Self-efficacy, which signifies self-competence and confidence in one's ability as a mall shopper indicates that as the self-efficacy increases Indian consumers' will eventually patronize malls. Conclusions - Self-image congruency plays a salient role in predicting mall-shopping patronage. The mall management should ensure that the mall marketing strategies incorporate it along with the other components of TPB to warrant decent footfall.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.24 no.2 s.173
• /
• pp.362-369
• /
• 2000

Via screw theory, a vibration mode can be geometrically interpreted as a pure rotation about the vibration center in a plane and as a twisting motion on a screw in a three dimensional space. In thi s paper, applying the conditions that can be used to diagonalize the stiffness matrix by a parallel axis congruence transformation, the vibration modes and frequency response of an elastically suspended optical disc drive have been analyzed. It is first shown that the system has one plane of symmetry, which enables one to decouple the complicated vibration modes into two sets of modes independent of each other. Having obtained the analytical solutions for the axes of vibrations, the frequency response for a given applied input force has been demonstrated. Most importantly, it has been explained that this research result could be used in the synthesis process of a linear vibration system in order to improve the frequency response.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.14 no.4
• /
• pp.1648-1672
• /
• 2020

There are several types of image registration in the sense of stitching separated images that overlap each other. One of these is feature-based registration by a common feature descriptor. In this study, we generate a mosaic of images using feature-based registration for drone aerial images. As a feature descriptor, we apply the scale-invariant feature transform descriptor. In order to investigate the authenticity of the feature points and to have the mapping function, we employ the sample consensus method; we consider the sensed image's inherent characteristic such as the geometric congruence between the feature points of the images to propose a novel hypothesis estimation of the mapping function of the stitching via some optimally chosen initial candidate inliers in the sample consensus method. Based on the experimental results, we show the efficiency of the proposed method compared with benchmark methodologies of random sampling consensus method (RANSAC); the well-ordering property defined in the context and the extensive stitching examples have supported the utility. Moreover, the sample consensus scheme proposed in this study is uncomplicated and robust, and some fatal miss stitching by RANSAC is remarkably reduced in the measure of the pixel difference.

• Korean Journal of Digital Imaging in Medicine
• /
• v.12 no.1
• /
• pp.43-50
• /
• 2010

The representative study of Patellofemoral Joint Merchant method can show the view for inspection of the sulcus angle, congruence angle and diagnose whether there are the vertical fractures and recognize the degree of dislocation and patella subluxation. However, anatomical correlation about the degree of knee joint curvature changes during position adjustment and distortion of the image reduces reproducibility. In order to resolve these problems, Merchant method needs to use assisting device which reduces the occurrence of repeat projection and effectively to increase unification of examination and the consistency of the image. However, there are disadvantages for patients who take other examinations. For example, they have to change the position for every examination and it might cause the patient's discomfort and increase of examination time. In this study, we newly devised commercial assisting device which improves the reproducibility of the images and reduces inconvenience of patients movement. Further research should be taken to obtain a image without patient's movement and to reduce the time of the examination than existing method.

• Clinics in Shoulder and Elbow
• /
• v.7 no.1
• /
• pp.46-50
• /
• 2004

The snapping scapula is a relatively uncommon phenomenon occuring as a consequence of some anomalous conditioin existing between the thoracic wall and the undersurface of the scapula. It may present in several ways like crepitus, pain during scapular movement and limitation of scapular motion. The causes of snapping scapula are changes in the intervening soft tissues, the muscles, or the bursae between the scapula and the chest wall; and changes in the congruence between the anterior scapular surface and the underlying chest wall. The congenital elbow fusion or humeroradioulnar synostosis is an extremely rare inheritable disorder that previously described just a few reports. Recently we experienced a case of snapping scapular with congenital bilateral elbow fusion treated by arthroscopic scapulothoracic bursectomy and consequent open superomedial scapulectomy. We would describe the clinical feature of a snapping scapula and result of treatment with literature review.

• Journal of Korean Institute of Industrial Engineers
• /
• v.41 no.3
• /
• pp.287-295
• /
• 2015

Due to the latest agreement between the military authorities of the Republic of Korea (ROK) and the United States (US) of America, Korea's annual contribution to the budget of the United States Forces Korea (USFK) rose as high as close to 1 trillion won. This seemingly prohibitive amount has led to the questioning of military critics regarding determination criteria, wholesomeness of cost, alignment of incentives, and implementational transparency, etc. As these sources of mistrust can potentially undermine the congruence of alliance, we attempt to devise a scientific means to test the validity of Korea's budget contribution. Specifically, we use the real options approach (ROA) to estimating the interval of the fair prices of maintaining the USFK. We consider the USFK as an insurance against foreign incursions, and this enables us to assume their role as a put option. Upon a hypothetical war breakout, the daily cumulative size of the Korean economy is estimated by implementing the simulated loss ratios of assets and population. As a result, the strategic value (put premium) of the USFK is exponentially higher the sooner the US forces are augmented following an intrusion. Also, Korea's payments toward the USFK in 2011 and 2012 appear theoretically fairly valued.

• Journal of the Korean Mathematical Society
• /
• v.48 no.6
• /
• pp.1249-1268
• /
• 2011

For imaginary quadratic number fields F = $\mathbb{Q}(\sqrt{{\varepsilon}p_1{\ldots}p_{t-1}})$, where ${\varepsilon}{\in}${-1,-2} and distinct primes $p_i{\equiv}1$ mod 4, we give condition of 8-ranks of class groups C(F) of F equal to 1 or 2 provided that 4-ranks of C(F) are at most equal to 2. Especially for F = $\mathbb{Q}(\sqrt{{\varepsilon}p_1p_2)$, we compute densities of 8-ranks of C(F) equal to 1 or 2 in all such imaginary quadratic fields F. The results are stated in terms of congruence relation of $p_i$ modulo $2^n$, the quartic residue symbol $(\frac{p_1}{p_2})4$ and binary quadratic forms such as $p_2^{h+(2_{p_1})/4}=x^2-2p_1y^2$, where $h+(2p_1)$ is the narrow class number of $\mathbb{Q}(\sqrt{2p_1})$. The results are also very useful for numerical computations.

• The Journal of the Korea Contents Association
• /
• v.20 no.5
• /
• pp.271-280
• /
• 2020

The use of multiple celebrity endorsement is a common practice in advertising campaigns. However, little research has been conducted on the effects of multiple celebrity endorsement. In particular, the current study is designed to delve into what factors influence the effects of multiple celebrity endorsement. Portfolio-brand fit, portfolio-celebrity fit, and portfolio celebrity-consumer fit are three factors that affect a consumer's attitude toward the ad, the endorsed brand, and the purchase intention in the context of multiple celebrity endorsement. Study findings suggest that portfolio-brand fit, portfolio-celebrity fit, and portfolio celebrity-consumer fit positively affect attitudes toward the ad. In addition, as shown in the modified model, covariance among these three variables was found. Practical and theoretical implications were also discussed.