• Journal of the Korean Mathematical Society
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• v.40 no.1
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• pp.73-86
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• 2003

In this paper, we define a generalized sequential operator-valued function space integral by using a generalized Wiener measure. It is an extention of the sequential operator-valued function space integral introduced by Cameron and Storvick. We prove the existence of this integral for functionals which involve some product Borel measures.

• Proceedings of the KOSOMBE Conference
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• v.1993 no.11
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• pp.171-174
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• 1993

We propose the vocal tract area function as the feature vector of speech recognition. Vocal tract area function is directly related to speech production. The vocal tract area function is not only showing mechanism of speech production but also can be used as an effective feature vector in speech, recognition in this study.

• Korean Journal of Mathematics
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• v.29 no.2
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• pp.211-225
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• 2021

In the present paper we introduce some sequence spaces over n-normed spaces defined by fractional difference operator and Musielak-Orlicz function 𝓜 = (𝕱_i). We also study some topological properties and prove some inclusion relations between these spaces.

• The Journal of Korean Society for Neurotherapy
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• v.22 no.3
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• pp.37-42
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• 2018

Purpose. The purpose of this study was to determine the relationship between sleep quality and cognitive function, depression, and institutionalized elderly activity. The goal is to improve the quality of life through early intervention in the sleeping problems of the elderly hospitalized in the nursing home. Method Twentythree patients who were diagnosed with CDR (clinical dementia grade) 0.5 ~ 2 stages by a psychiatrist from September 3 to 30, 2017 were measured for sleep status, depression, cognitive function and activities of daily living at the same time once a day. The collected data were analyzed using SPSS (v.21, IBM, USA) program. Results The correlation between sleep status and cognitive function, depression, and activities of daily living was not statistically significant, and there was a moderate correlation between cognitive function and depression. Conclusion The results of this study suggest that the development and application of a program that activates the cognitive function that is institutionalized with a positive correlation between cognitive function and depression will be effective in decreasing depression in the elderly patients hospitalized in the nursing home.

• Communications of the Korean Mathematical Society
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• v.35 no.3
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• pp.927-933
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• 2020

We characterize Möbius functions mapping the unit disc of the complex plane contractively into itself. We then give a procedure to produce Möbius iterated function systems on the unit disc.

• Kyungpook Mathematical Journal
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• v.50 no.3
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• pp.447-454
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• 2010

In this paper, we investigate the uniqueness problems of meromorphic functions that share a small function with its differential polynomials, and give a result which is related to a conjecture of R. Br$\"{u}$ck and improve the results of I. Lahiri and Q. C. Zhang.

• Journal of the Chungcheong Mathematical Society
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• v.22 no.3
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• pp.467-480
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• 2009

In 1859, Bernhard Riemann, in his epoch-making memoir, extended the Euler zeta function $\zeta$(s) (s > 1; $s{\in}\mathbb{R}$) to the Riemann zeta function $\zeta$(s) ($\Re$(s) > 1; $s{\in}\mathbb{C}$) to investigate the pattern of the primes. Sine the time of Euler and then Riemann, the Riemann zeta function $\zeta$(s) has involved and appeared in a variety of mathematical research subjects as well as the function itself has been being broadly and deeply researched. Among those things, we choose to make a further investigation of the following subjects: Evaluation of $\zeta$(2k) ($k {\in}\mathbb{N}$); Approximate functional equations for $\zeta$(s); Series involving the Riemann zeta function.

• The Journal of Korean Physical Therapy
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• v.17 no.4
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• pp.493-504
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• 2005

The purpose of this study is to determine the effect of constraint-induced movement therapy on the involved hand function and ADL in stroke patients. Five subjects with fixing unaffected arms by CIMT were assigned to the experimental patient group and the other five patients to control group without fixing unaffected arms. The function of hand for both groups were evaluated by using Jebsen-Taylor hand function test and ADL for both groups were evaluated by FIM(Functional Independence Measure) before and after task practice. In conclusion, results of this study showed that improved hand function and ADL by CIMT in stroke patients. We concluded that CIMT can improved the involved hand function and ADL in stroke patients.

• Proceedings of the KSRS Conference
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• v.2
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• pp.812-815
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• 2006

Proteins are essential agents for controlling, effecting and modulating cellular functions, and proteins with similar sequences have diverged from a common ancestral gene, and have similar structures and functions. Function prediction of unknown proteins remains one of the most challenging problems in bioinformatics. Recently, various computational approaches have been developed for identification of short sequences that are conserved within a family of closely related protein sequence. Protein function is often correlated with highly conserved motifs. Motif is the smallest unit of protein structure and function, and intends to make core part among protein structural and functional components. Therefore, prediction methods using data mining or machine learning have been developed. In this paper, we describe an approach for protein function prediction of motif-based models using data mining. Our work consists of three phrases. We make training and test data set and construct classifier using a training set. Also, through experiments, we evaluate our classifier with other classifiers in point of the accuracy of resulting classification.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.20 no.1
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• pp.172-179
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• 1996

For mechanical systems operating at high tempertature, thermal fatigue phenomenon has been recognized as a major cause of mechanical component failures. To evaluate cumulative fatigue damage as a conesquence of thermal fatugue on real time, the stress tranfer function(Green's function) approach is popularly used. The objective of this paper is to investigate the effect of thermophsical properties on the stress tranfer function. For this purpose a modified Green's function approach considering temperature-dependent thermophysical properties is proposed. Two case studies were performed and the proposed approach agrees well with full finite element analysis.