• Kyungpook Mathematical Journal
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• 제61권1호
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• pp.111-137
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• 2021

Higson proved that every homotopy invariant, stable and split exact functor from the category of C⁎-algebras to an additive category factors through Kasparov's KK-theory. By adapting a group equivariant generalization of this result by Thomsen, we generalize Higson's result to the inverse semigroup and locally compact, not necessarily Hausdorff groupoid equivariant setting.

• 대한기계학회논문집A
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• 제22권3호
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• pp.483-492
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• 1998

An inverse analysis been applied to obtain the flow stress of the material. In this method, a ring-shaped specimen is compressed between two flat tools. This procedure employs, as the object function of inverse analysis, the balance of measured loads and reaction forces calculated by using rigid-plastic finite element method. The balance is explicit scalar function of flow stress which is a function of some unknown constants. For minimizing the balance, Newton-Raphon scheme is used. The friction factor, m, between flat tools and the specimen is determined by using friction area-divided method. The proposed method allows an accurate identification by avoiding the usual assumptions made in order to convert experimental measures into stress-strain relation. In this paper, the proposed method is numerically tested. A commercial pure aluminum was selected, as an example, to apply the method and the results are compared with stress-strain relation obtained by experiments.

• The Journal of Korean Physical Therapy
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• 제12권2호
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• pp.83-93
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• 2000

29 dementia patients over 60 years of no in the nursing home were assigned to execute rehabilitation program a month for 3 months. 1 evaluated MBI scores and MMSE scores and analyzed correlation between both scores. Analyses of results were as follows : 1. In the experimental group with rehabilitation program. ADL and cognitive function were improved significantly(p<0.05). 2. In the control group with no rehabilitation program. ADL was decreased significantly(p<0.05), cognition was not changed (pgt;0.05). 3. There were significant rises in MBI scores and MMSE scores in the experimental group(p<0.05). 4. There was a significant fall in MBI scores in the control group(p<0.05). a no change in MMSE scores in the control group(p>0.05). 5. There was strong correlation between ADL and cognition in the experimental group and the control group. 6. Inverse correlation revealed between the experimental group and the control group in ADL. 7. Inverse correlation revealed between the experimental group and the control group in cognition.

• 한국분말재료학회지
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• 제18권4호
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• pp.347-358
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• 2011

Two different schemes were adopted to fabricate ordered macroporous structures with face centered cubic lattice of air spheres. Monodisperse polymeric latex suspension, which was synthesized by emulsifier-free emulsion polymerization, was mixed with metal oxide ceramic nanoparticles, followed by evaporation-induced self-assembly of the mixed hetero-colloidal particles. After calcination, inverse opal was generated during burning out the organic nanospheres. Inverse opals made of silica or iron oxide were fabricated according to this procedure. Other approach, which utilizes ceramic precursors instead of nanoparticles was adopted successfully to prepare ordered macroporous structure of titania with skeleton structures as well as lithium niobate inverted structures. Similarly, two different schemes were utilized to obtain disordered macroporous structures with random arrays of macropores. Disordered macroporous structure made of indium tin oxide (ITO) was obtained by fabricating colloidal glass of polystyrene microspheres with low monodispersity and subsequent infiltration of the ITO nanoparticles followed by heat treatment at high temperature for burning out the organic microspheres. Similar random structure of titania was also fabricated by mixing polystyrene building block particles with titania nanoparticles having large particle size followed by the calcinations of the samples.

• Advances in aircraft and spacecraft science
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• 제9권4호
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• pp.301-318
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• 2022

This paper presents the free vibration analysis of 3D printed sandwich beams by using high-order theories based on the Carrera Unified Formulation (CUF). In particular, the component-wise (CW) approach is adopted to achieve a high fidelity model of the printed part. The present model has been used to build an accurate database for collecting first natural frequency of the beams, then predicting Young's modulus based on an inverse problem formulation. The database is built from a set of randomly generated material properties of various values of modulus of elasticity. The inverse problem then allows finding the elastic modulus of the input parameters starting from the information on the required set of the output achieved experimentally. The natural frequencies evaluated during the experimental test acquired using a Digital Image Correlation method have been compared with the results obtained by the means of CUF-CW model. The results obtained from the free-vibration analysis of the FDM beams, performed by higher-order one-dimensional models contained in CUF, are compared with ABAQUS results both first five natural frequency and degree of freedoms. The results have shown that the proposed 1D approach can provide 3D accuracy, in terms of free vibration analysis of FDM printed sandwich beams with a significant reduction in the computational costs.

• 응용통계연구
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• 제5권1호
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• pp.1-8
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• 1992

Partitioned matrices를 이용해, v = 2.2.2인 경우의 Hierarchical Group Divisible (HGD) design의 해를 역행렬을 이용하지 아니하고 구하는 방법을 제시하였다.

• 대한전자공학회논문지
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• 제27권5호
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• pp.747-755
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• 1990

In this paper, we presented a method of constructing a multiplier and an inverse element generator over finite field GF(3**m). We proposed the multiplication method using a descending order arithmetics of mod F(X) to perform the multiplication and mod F(X) arithmetics at the same time. The proposed multiplier is composed of following parts. 1) multiplication part, 2) data assortment generation part and 5) multiplication processing part. Also the inverse element generator is constructed with following parts. 1) multiplier, 2) group of output registers Rs, 3) multiplication and cube selection gate Gl, 4) Ri term sequential selection part. 5) cube processing part and 6) descending order mod F(X) generation part. Especially, the proposed multiplier and inverse element generator give regularity, expansibility and modularity of circuit design.

• 사상체질의학회지
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• 제34권1호
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• pp.1-12
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• 2022

Objectives This study aimed to examine the differences in the distribution of metabolic syndrome(MetS) and cold hypersensitivity in the hands and feet(CHHF) according to Sasang constitution, and to determine whether CHHF and MetS have an inverse association. Methods MetS and its components, CHHF, Sasang constitution data from 1,998 participants in the Korean medicine Daejeon Citizen Cohort study(KDCC) were obtained. The participants were divided into a non-CHHF(n = 1,270, 63.6%), intermediate(n = 220, 11.0%) and CHHF(n = 508, 25.4%) group according to the thermal sensitivity questionnaire. Sasang constitution was diagnosed by Korea Sasang Constitutional Diagnostic Questionnaire(KS-15). One-way ANOVA and the chi-square test were used for participants' general characteristics and thermal sensitivity and MetS related factors. ANCOVA and logistic regression were used to compare the differences and the odds ratios(ORs) for MetS and its components. Results The MetS and CHHF prevalence rates of the Taeeumin, Soeumin, and Soyangin were 27.6%, 3.8%, 7.7%, and 18.3%, 42.3%, 26.4% respectively. The ANCOVA for MetS components showed that the waist circumference was significantly lower in the CHHF group as compared to the non-CHHF group in total and Soyangin. The logistic regression for MetS prevalence showed that CHHF had a significant inverse association in total(OR = 0.611) and Taeeumin(OR = 0.521). Conclusions The MetS prevalence had the highest in Taeeumin, followed by Soyangin and Soeumin, while the prevalence of CHHF was highest in Soeumin, followed by Soyangin and Taeeumin. In addition, it was confirmed that CHHF and MetS had an inverse association independently.

• The Korean Journal of Ceramics
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• 제6권3호
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• pp.240-244
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• 2000

The three-dimensional orientation distribution function of a conical shaped tungsten liner prepared by the thermo-mechanical forming process was analyzed by 1.525$\AA$ neutrons to carry out the Rietveld refinement. The pole figure data of three reflections, (110)(220) and (211) were measured. The orientation distribution functions for the normal and radial directions were calculated by the WIMV method. The inverse pole figures of the normal and radial directions were obtained from their orientation distribution functions. The Rietveld refinement was performed with the RIETAN program that was slightly modified for the description of preferred orientation effect. We could successfully do the Rietveld refinement of the strongly textured tungsten liner by applying the pole density of each reflection obtained from the inverse pole figure to the calculated diffraction pattern. The correction method of preferred orientation effect based on the inverse pole figures showed a good improvement over the semi-empirical texture correction based on the direct usage of simple empirical functions.

• KIEE International Transactions on Power Engineering
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• 제5A권4호
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• pp.403-411
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• 2005

At present, the Cournot model is one of the most commonly used theories to analyze the gaming situation in an oligopoly type market. However, several problems exist in the successful application of this model to the electricity market. The representative one is obtaining the inverse demand curve able to be induced from the relationship between market price and demand response. In the Cournot model, each player offers their generation quantity to obtain maximum profit, which is accomplished by reducing their quantity compared with available total capacity. As stated above, to obtain the probable Cournot equilibrium to reflect the real market situation, we have to induce the correct demand function first of all. Usually the correlation between price and demand appears over the long-term through statistical data analysis (for example, regression analysis) or by investigating consumer utility functions of several consumer groups classified as residential, industrial, and commercial. However, the elasticity has a tendency to change continuously according to the total market demand size or the level of market price. Therefore it should be updated as the trading period passes by. In this paper we propose a method for inducing and updating this price elasticity of demand function for more realistic market equilibrium.