• Communications of the Korean Mathematical Society
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• v.28 no.3
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• pp.527-534
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• 2013

We first aim at proving an interesting easily derivable summation formula. Then it is easily seen that this formula immediately yields a hypergeometric summation theorem recently added to the literature by Qureshi et al. Moreover we apply the main formulas to present some interesting summation formulas, whose special cases are also seen to yield the earlier known results.

• Proceedings of the KIEE Conference
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• 1993.07a
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• pp.515-517
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• 1993

Dispatcher's Training simulation function are network analysis, power system modeling, supervisory control, and system security assessment. This function provides hand-on training for power dispatchers for operation of the nation control center in the future, it needs interface between simulator and expert system. This paper introduces DTS function which is adopted in the Central Load Dispatching Office.

• Honam Mathematical Journal
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• v.40 no.4
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• pp.691-700
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• 2018

The main object of the present research paper is to establish two (potentially) useful Euler type integrals involving multiindex Mittag-Leffler functions, which are expressed in terms of Wright hypergeometric functions. Some deductions of the main results are also indicated.

• Physical Therapy Korea
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• v.5 no.3
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• pp.21-33
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• 1998

The purposes of this study were to ascertain differences of the sensory system, central processing system, effector system, and balance ability according to general characteristics (sex, fall experience, and age), and to identify the contributions of the sensory, central processing, and effector system to balance ability in 83 healthy elderly subjects. The subjects were elderly (over 60 years) who live in Wonju City. All subjects participated in six tests (position sense test, visual acuity, vestibular stepping test, Mini-Mental Status Exam-Korea, strength of dorsiflexors, and Berg Balance Test). Collected data were analyzed by the independent t-test, one-way ANOVA, and stepwise multiple regression. The results were as follows: 1. The results of the six tests according to sex showed that vestibular function was significantly better in women than in men. But visual acuity, cognitive function, strength of dorsiflexors, and balance ability were significantly better in men than in women (p<0.05). 2. There were no significant differences in position sense, visual acuity, vestibular function, cognitive function, strength of dorsiflexors, and balance ability between fallers and non-fallers (p>0.05). 3. However, the results of the six tests according to age (group A: 60-69 years, group B: 70-79 years, group C: 80-89 years) showed significant differences in five tests. In the Scheff$\acute{e}$ test, position sense, visual acuity, and cognitive function showed significantly different results between in group A and group C: the strength of the dorsiflexors was significantly different between in group A and group B, and balance ability was significantly different between in group A and group C, and between in group B and group C (p<0.05). 4. Cognitive function and position sense were positively associated with balance ability. Their power of explanation regarding balance ability was 38% (p<0.05). These results suggest that cognitive function and position sense play an important role in balance ability. This would seem to suggest that programs for evaluation or improvement of elderly's balance ability in the elderly should consider cognitive function and position sense.

• Korean Journal of Psychosomatic Medicine
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• v.4 no.1
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• pp.146-154
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• 1996

The impact of stress on immune function is known to be associated with the interactions among the central nervous system(CNS), neuroendocrine system, and immune system. The main pathways between stress and immune system are wiring of lymphoid organs and neuroendocrine system. Immune system also produces neuropeptides, which modulate immune system. Mediators of psychosocial influences on immune function are found to be peptides released by the pituitry, hormones, md autonomic nervous system. Hypothalamus integrates endocrine, neural and immune systems. Particularly, paraventricular nucleus appears to play a central role in this integration. On the other hand, endocrine system receives feedback from the immune system. The major regulatory pathways which pituitary modulates include the hypothalamic-pituitary-adrenal-thymic(HPAT) axis, hypothalamic-pituitary-gonadal-thymic(HPGT) axis, pineal-hypothalamic-pituitary(PHP) axis. Bidirectional pathways such as feedforward and feedback pathways are suggested in the interaction between stress and immune system. It suggests that psychosocial inputs affect immune function, but also that immunological inputs affect psychosocial function. Thus, prospective studies for elucidating the relationship between stress and immune function should incorporate measures of immune function as well as measures of endocrine, autonomic, and brain activities at the same time.

• Journal of the Korean Mathematical Society
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• v.52 no.6
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• pp.1139-1148
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• 2015

The estimate of third Hankel determinant $$H_{3,1}(f)=\left|a_1\;a_2\;a_3\\a_2\;a_3\;a_4\\a_3\;a_4\;a_5\right|$$ of the analytic function $f(z)=z+a2z^2+a3z^3+{\cdots}$, for which ${\Re}(1+zf^{{\prime}{\prime}}(z)/f^{\prime}(z))>-1/2$ are investigated. The corrected version of a known results [2, Theorem 3.1 and Theorem 3.3] are also obtained.

• Journal of the Korean Mathematical Society
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• v.49 no.3
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• pp.537-547
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• 2012

In this paper, we define a $p$, $q$-difference operator and obtain an explicit formula which is used to express the $p$, $q$-analogue of the unified generalization of Stirling numbers and its exponential generating function in terms of the $p$, $q$-difference operator. Explicit formulas for the non-central $q$-Stirling numbers of the second kind and non-central $q$-Lah numbers are derived using the new $q$-analogue of Newton's interpolation formula. Moreover, a $p$, $q$-analogue of Newton's interpolation formula is established.

• Journal of Dental Rehabilitation and Applied Science
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• v.19 no.1
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• pp.35-41
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• 2003

With the understanding of tooth crown biomechanics and the progress of dentin adhesives, bonded porcelain restorations including a porcelain laminate veneer present an extended spectrum of indications for anterior teeth. Porcelain laminate veneer as a restoration offers the conservative solution that balances the functional and esthetic needs of the anterior dentition. Porcelain's stiffness, its surface characteristics, and the biomechanical strength achieved through bonding to tooth surface enable the restoration of the tooth as a whole supporting occlusal force and masticatory function. Namely, the optical effects inherent in the tooth and the lifelike features of the porcelain make that this restoration approaches the ultimate in esthetic satisfaction for both the dentist and the patient. A 49-year-old female patient with the incisal discoloration of upper central incisors and black triangle between the central incisors was referred to correct her esthetic problems with prosthodontic approach. The patient was satisfied with two porcelain laminate veneers that were made according to prof. Magne and Belser's recommendation.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.3
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• pp.450-454
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• 2003

It is important to control the processing conditions to maximize the replication quality of UV-molded microstructure. In the present study, the tip radius anil surface roughness of V-groove structure were measured to quantify the replication quality. UV-curing dose and the applied pressure were experimentally selected as the governing Processing conditions that affect the replication quality of the UV-molded part. Finally. an experimental optimization technique combining central composite design and desirability function approach was used to maximize the replication quality of UV-molded structure.

• BMB Reports
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• v.49 no.5
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• pp.255-262
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• 2016

The disease known as cerebral cavernous malformations mostly occurs in the central nervous system, and their typical histological presentations are multiple lumen formation and vascular leakage at the brain capillary level, resulting in disruption of the blood-brain barrier. These abnormalities result in severe neurological symptoms such as seizures, focal neurological deficits and hemorrhagic strokes. CCM research has identified 'loss of function' mutations of three ccm genes responsible for the disease and also complex regulation of multiple signaling pathways including the WNT/β-catenin pathway, TGF-β and Notch signaling by the ccm genes. Although CCM research is a relatively new and small scientific field, as CCM research has the potential to regulate systemic blood vessel permeability and angiogenesis including that of the blood-brain barrier, this field is growing rapidly. In this review, I will provide a brief overview of CCM pathogenesis and function of ccm genes based on recent progress in CCM research.