• Title/Summary/Keyword: multiple scale methods

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A Meshless Method and its Adaptivity for Stress Concentration Problems (응력집중문제의 해석을 위한 적응적 무요소절점법에 관한 연구)

  • 이상호;전석기;김효진
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1997.10a
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    • pp.16-23
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    • 1997
  • The Reproducing Kernel Particle Method (RKPM), one of the popular meshless methods, is developed and applied to stress concentration problems. Since the meshless methods require only a set of particles (or nodes) and the description of boundaries in their formulation, the adaptivity can be implemented with much more ease than finite element method. In addition, due to its intrinsic property of multiresolution, the shape function of RKPM provides us a new criterion for adaptivity. Recently, this multiple scale Reproducing Kernel Particle Method and its adaptive procedure have been formulated for large deformation problems by the authors. They are also under development for damage materials and localization problems. In this paper the multiple scale RKPM for linear elasticity is presented and the adaptive procedure is applied to stress concentration problems. Therefore, this work may be regarded as the edition of linear elasticity in the complete framework of multiple scale RKPM and the associated adaptivity.

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A Clinical Case Report on Multiple Sclerosis Treated by Korean Medicine (다발성 경화증에 대한 한방치료 치험 1례)

  • Jeon, Yong-Tae;Park, Sang-Hun;Ko, Youn-Seok
    • The Journal of Churna Manual Medicine for Spine and Nerves
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    • v.9 no.2
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    • pp.21-33
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    • 2014
  • Objectives : This study was to report the improvement of the patient with multiple sclerosis treated by Korean Medical treatment. Methods : The patient diagnosed as multiple sclerosis treated by acupuncture, bee venom pharmacupuncture, chuna manual therapy, and herbal medicine. To evaluate the effects of korean medicine, we used manual muscle test(MMT), the standard for assessment of the effect of stroke treatment, functional system(FS), visual analog scale(VAS). Results : 1. The patient's pain and optic dysfunction were reduced by the above therapy. 2. There was no change in manual muscle test(MMT), but there was mild improvement in finger joints function in the standard for assessment of the effect of stroke treatment. 3. In functional system(FS) scale, there was enhancement in optic function within a range. And there was improvement in expanded disability statue scale(EDSS) from 4.0 to 3.0. 4. In visual analog scale(VAS), there was considerable improvement from 9 to 6. Conclusions : The korean medical treatment was reduced pain and optic dysfunction.

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A Case Report of Multiple System Atrophy in a Cerebellar Ataxia Patient Suffering from Gait Disturbance Treated with Korean Medicine (보행장애를 주소로 하는 소뇌형 다계통 위축증 환자의 한방 치료 1례)

  • Woo, Seong-jin;Baek, Kyung-min;Jang, Woo-seok
    • The Journal of Internal Korean Medicine
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    • v.37 no.5
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    • pp.806-814
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    • 2016
  • Objective: To describe the effect of Korean medicine on gait disturbance in a patient with multiple system atrophy and cerebellar ataxia. Methods: We observed a 75-year-old female patient who had multiple system atrophy and cerebellar ataxia. The patient was treated with Korean medicine, including acupuncture, moxibustion, and herbal medicine (Yukmijihwang-tang-gamibang and Boyanghwano-tang-gamibang) for 38 days. We evaluated the patient with the Korean version of the Berg Balance Scale (K-BBS), the Unified Multiple System Atrophy Rating Scale (UMSARS), and the Numeric Rating Scale-11 (NRS-11). Results: After treatment, the patient’s symptoms were improved. The K-BBS score increased from 9 to 19, while the UMSARS score decreased from 16 to 12 in Part I, from 15 to 7 in part Ⅱ, and from 4 to 3 in part Ⅳ. The NRS-11 score of gait disturbance decreased from 10 to 5. Conclusions: Korean medicine may be an effective treatment for gait disturbance in multiple system atrophy with cerebellar ataxia.

PARALLEL OPTIMAL CONTROL WITH MULTIPLE SHOOTING, CONSTRAINTS AGGREGATION AND ADJOINT METHODS

  • Jeon, Moon-Gu
    • Journal of applied mathematics & informatics
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    • v.19 no.1_2
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    • pp.215-229
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    • 2005
  • In this paper, constraint aggregation is combined with the adjoint and multiple shooting strategies for optimal control of differential algebraic equations (DAE) systems. The approach retains the inherent parallelism of the conventional multiple shooting method, while also being much more efficient for large scale problems. Constraint aggregation is employed to reduce the number of nonlinear continuity constraints in each multiple shooting interval, and its derivatives are computed by the adjoint DAE solver DASPKADJOINT together with ADIFOR and TAMC, the automatic differentiation software for forward and reverse mode, respectively. Numerical experiments demonstrate the effectiveness of the approach.

A Clinical Case Report of Multiple Sclerosis Treated with Only Hominis Placental Pharmacopuncture (자하거 약침 단독치료로 호전된 다발성 경화증 치험 1례)

  • Hwang, Gyu-sang;Yu, Keun-jeong;Lee, Su-yeong;Lee, Jun-yeong;Kim, Du-ri;Hong, Ka-kyung;Shin, Sun-ho;Shin, Yong-jeen
    • The Journal of Internal Korean Medicine
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    • v.38 no.2
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    • pp.289-300
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    • 2017
  • Objectives: This case report describes the effect of Hominis placenta pharmacopuncture (HPP) on multiple sclerosis. Methods: A multiple sclerosis patient with gait disturbances, tremors, spasms of both lower limbs, and diplopia was treated with only HPP for two weeks. To evaluate the effects of HPP on the balance ability of the patient, the Functional System (FS) scale, Expanded Disability Statue Scale (EDSS), visual analog scale (VAS), manual muscle test (MMT), and Berg Balance Scale (BBS) were used. Results: The HPP treatment reduced the patient's gait disturbance, tremors, spasms of the lower limbs, and diplopia. According to the FS scale, the patient's cerebellar and optic functions were enhanced. In addition, the patient's performance on the EDSS improved from 4.0 to 3.0.3. As shown by the MMT, the lower extremities showed a mild improvement (from F+ to G.4). Furthermore, the VAS showed a considerable improvement, decreasing from 9 to 6.5 post-treatment. The patient's performance on the BBS, which denotes balance ability, showed a considerable improvement, increasing from 38 to 49. Conclusion: Treatment with only HPP could help to ameliorate the symptoms of multiple sclerosis.

대변형 초탄성 재료의 해석을 위한 무요소 적응기법

  • 전석기;정동원
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.10a
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    • pp.736-739
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    • 1995
  • The meshless adaptive method based on multiple scale analysis is developed to simulate large deformation problems. In the procedure, new particles are simply added to the orginal particle distribution because meshless methods do not require mesh structures in the formulations. The high scale component of the approximated solution detects the localized region where a refinement is needed. The high scale component of the second invariant od Green-Lagrangian strain tensor is suggested as the new high gradient detector for adaptive procedures. The feasibility of the proposed theory is demonstrated by a numerical experiment for the large deformation of hyperelastic materials.

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Case Study of Spatial Planning for the Efficient Use of Small Dwelling Space (소규모 주거공간의 효율적 활용을 위한 공간계획 사례연구)

  • Park, Si-Yoon;Kim, Jeong-Ah
    • Journal of the Korean housing association
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    • v.25 no.1
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    • pp.15-22
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    • 2014
  • In the domestic housing market, uncompleted lot-solid apartments and unoccupied residences are increasing in the medium-large scale area whose rents and transactions have been unstable, as going through the financial crisis and economical recession. Demands for small-scale housings are steadily increasing by practical consumer group who don't need large places, which are often not needed for the current people who are spending most of their time outside of their houses. Therefore, this study proposes the useful methods for spatial planning for small-scale houses for multiple households, including variable form, levels form, multi-level form, and smart-sizing. For efficient spatial planning for that purpose, here, small-scale housings are not limited to places for families with 1-2 members, but considered as one of broader approaches to graft various households and families. In addition, we examined the existed trends of researches about spatial utility of small-scale places, and did the research about the status of small-scale housing developments, and then proposed the direction for future small-scale housings by analyzing the advanced examples.

Gated Multi-channel Network Embedding for Large-scale Mobile App Clustering

  • Yeo-Chan Yoon;Soo Kyun Kim
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.17 no.6
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    • pp.1620-1634
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    • 2023
  • This paper studies the task of embedding nodes with multiple graphs representing multiple information channels, which is useful in a large volume of network clustering tasks. By learning a node using multiple graphs, various characteristics of the node can be represented and embedded stably. Existing studies using multi-channel networks have been conducted by integrating heterogeneous graphs or limiting common nodes appearing in multiple graphs to have similar embeddings. Although these methods effectively represent nodes, it also has limitations by assuming that all networks provide the same amount of information. This paper proposes a method to overcome these limitations; The proposed method gives different weights according to the source graph when embedding nodes; the characteristics of the graph with more important information can be reflected more in the node. To this end, a novel method incorporating a multi-channel gate layer is proposed to weigh more important channels and ignore unnecessary data to embed a node with multiple graphs. Empirical experiments demonstrate the effectiveness of the proposed multi-channel-based embedding methods.

Measuring expectations by SERVQUAL scale in the assessment of nursing service quality (기대수준 측정방법에 따른 간호 서비스의 질 평가;제주 지역의 종합병원들을 중심으로)

  • Kim, Jeong-Hee
    • Journal of Korean Academy of Nursing Administration
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    • v.9 no.2
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    • pp.251-264
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    • 2003
  • Purpose : The expectations are defined as desired expectations in initial SERVQUAL scale(1985, 1988), but in modified SERVQUAL scale(1991), are defined as a feasible ideal point expectations. In assessment of nursing service quality by SERVQUAL scale, the definitions of expectations is important problem. The purpose of this study was to compare the feasible ideal point expectations with the desired expectations in assessment of nursing service quality using SERVQUAL scale. Methods : The subjects were 256 inpatients at 4 general hospitals in Jeju-do(123 for feasible ideal point and 133 for desired). The data were collected by two types of self-reporting questionnaires to measure the feasible ideal point and desired expectations. For data analysis, t-test, multiple regression, and comparative analysis of multiple Rs via Fishers Z transformation. Results : Compared with the SERVQUAL scores, the feasible ideal point expectations better explained the variations of the overall consumer satisfaction($R^2$=O.33) than the desired($R^2$=O.25). Conclusion : The feasible ideal point expectations were more suitable to the assessment of nursing service quality using SERVQUAL scale. It will be need to explore the conceptual definitions of expectations using SERVQUAL scale in different settings. Also, further study needs to be conducted to compare alternative service quality measurement scales.

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Effects of Self Concept on Clinical Competency in Hospital Nurses (병원 간호사의 자아개념이 실무능력에 미치는 영향)

  • Han, Su Jeong
    • Korean Journal of Adult Nursing
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    • v.19 no.2
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    • pp.274-282
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    • 2007
  • Purpose: This study was designed to identify the self concept and clinical competency of nurses in hospitals and to examine the relationship between two concepts. Methods: A questionnaire was used for data collection which was done from July 1 to July 30 in 2005. The respondents were 267 staff nurses in a university hospital and general hospitals in two cities. The instruments were Son's(2002) self concept scale and Lee's(2002) clinical competency scale. The data were analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients, and multiple regression using SPSS-WIN. Results: The results of this study were summarized as follows: First, the total mean score of self concept was 2.56, and clinical competency was 2.59 on a 4 point scale. Second, the self concept and clinical competency were significantly correlated. Third, the results of multiple regression showed that self concept explained 45.2% of clinical competency. Conclusion: Self concept has a strong influence on clinical competency. Therefore, individualized nursing management strategies and education programs must be developed in order to increase a nurses self concept.

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