• Coupled systems mechanics
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• v.8 no.2
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• pp.99-109
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• 2019

This work investigates the accuracy and performance of a $FE^2$ multi-scale implementation used to predict the behavior of composite materials. The equations are formulated assuming the small deformations solid mechanics approach in non-linear material models with hardening plasticity. The uniform strain boundary conditions are applied for the macro-to-micro transitions. A parallel algorithm was implemented in order to solve large engineering problems. The scheme proposed takes advantage of the domain decomposition method at the macro-scale and the coupling between each subdomain with a micro-scale model. The precision of the method is validated with a composite material problem and scalability tests are performed for showing the efficiency.

• Journal of Acupuncture Research
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• v.21 no.5
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• pp.27-44
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• 2004

Objective : To evaluate the pain improvement of the lumbago patients taken the electro-acupuncture therapy using Visual Analogue Scale. Methods : The 25 patients of 46 lumbago patients visited department of Acupuncture & Moxibustion in National Medical Center from 1st March to 20th August had taken the electro-acupucture therapy more than 5 times. We checked on their age, sex, onset, radiating pain, back pain past history and Straight Leg Raising test. And we evaluated their improvement of back pain using Visual Analog Scale(VAS) at each visit. Then we analyzed the pain improvement by their age, sex, onset, radiating pain, back pain past history, Straight Leg Raising test, visiting frequency and Visual Analog Scale on 1st visit(VAS1) Results : VAS of 24 patients has improved and VAS of one patient has not been changed. There's no patient getting worse. The women and the positive group at SLR Test had better result of pain improvement. Conclusion : The lumbago patients taken electro-acupuncture more than 5 times showed significantly different pattern of pain improvement according to the sex and the SLR test.

• Coupled systems mechanics
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• v.11 no.5
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• pp.411-438
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• 2022

In this paper, we present the parameter identification for inelastic and multi-scale problems. First, the theoretical background of several fundamental methods used in the upscaling process is reviewed. Several key definitions including random field, Bayesian theorem, Polynomial chaos expansion (PCE), and Gauss-Markov-Kalman filter are briefly summarized. An illustrative example is given to assimilate fracture energy in a simple inelastic problem with linear hardening and softening phases. Second, the parameter identification using the Gauss-Markov-Kalman filter is employed for a multi-scale problem to identify bulk and shear moduli and other material properties in a macro-scale with the data from a micro-scale as quantities of interest (QoI). The problem can also be viewed as upscaling homogenization.

• Journal of Korean Academy of Nursing Administration
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• v.11 no.2
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• pp.159-172
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• 2005

Purpose: The Purpose of this study was to development a verbal abuse scale for operating room nurses in Korea. Method: To achieve the purpose of the study, a questionnaire was developed to interview 30 nurses and distributed to 761 nurses who working at 28 general hospital in Korea from september 7 to November 25, 2004. Item analysis and factor analysis were carried out to validate violence predicting scale. Cronbach's Alpha coefficient was used to test reliability of the scale. The data were analyzed by using SPSS/WIN 11.5 program. Result: As a result of the item analysis and factor analysis, 17 items were selected from the total of 30 items, and four factors were labeled as 'self esteem abuse by nurses(7 items)', 'self esteem abuse by physicians(6 items)', 'sexual abuse by physicians(2 items)', 'colleague abuse by physicians(2 items)'. Four factors were explained by 60.8% out of the total variance. The first factor explained 35.456%, second factor explained 12.401% and third factor explained 6.637%. And fourth factor explained 6.304%. Reliability of the factors were tested by Cronbach's Alpha coefficient and result was 0.885. Conclusion: The scale was identified to be a tool with a high degree of reliability and validity. Therefore, this scale can be effectively utilized for assessment of verbal abuse for operating room nurses by nurses and physicians in Korea.

• Membrane and Water Treatment
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• v.2 no.2
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• pp.121-136
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• 2011

A bench-scale test has recently been proposed as a predictive tool to minimize the scope of pilot-scale testing or to optimize the operation of full-scale membrane filtration systems. Consequently, a bench-scale testing unit was developed for this purpose and systematically evaluated in this study. This unit was capable of accommodating commercially available, low pressure, hollow fiber (LPHF) membranes with various configurations for testing under conditions comparable to real-world applications. Reproducibility of this unit in assessing membrane fouling and microbial removal efficiency of LPHF membranes was tested and statistically comparable results were obtained. This unit serves as a useful apparatus for academic researchers and utilities to evaluate the performance of LPHF membranes used for water treatment.

• The Journal of Korean Society for Radiation Therapy
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• v.16 no.1
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• pp.11-19
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• 2004

Purpose : Verification within 5mm is one of the important QA process of IMRP and SRS. Therefore, we improve accuracy of patients set-up using scale point. Materials and Methods : We compare MLC scale pointer with customerized port film graticule for patients who was underwent IMRT and SRS. Results : Scale pointer using MLC showed accurate location of patients landmark including divergency of beam, and any point of patient could be certified by means of cross of MLC. Conclusion : MLC scale pointer is effective and convenient method in verification of patients set-up using L-gram.

• Proceedings of the Korean Vacuum Society Conference
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• 1999.07a
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• pp.171-171
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• 1999

We studied the charge redistribution in the Pt-M (M=Cu, Co) alloys by X-ray Absorption Near Edge Spectroscopy(XANES) and X-ray Photoelectron Spectroscopy(XPS). These analysis tools provide us information about the charge transfer in the valence band of intermetallic bonding. The samples were prepared by arc-melting method. After annealing this samples in vacuum for several hours, we cold get the ordered samples, which were confirmed with XRD analysis. the core and valence level energy shift in these system were investigated by Mg $K\alpha$(1253.6eV) x-ray source for Pt-Co alloys and monochromatized Al $K\alpha$ (1486.6eV) for Pt-Cu alloys. Pt L2, L3-edge, and Cu, Co K-edge XANES spectra were measured with the total electron-yield mode detector at the 3Cl beam line of the PLS (Pohang light source0. from the changes of White line (WL) area and the core level shifts of the each metal sites, we can obtain the information about the electrons participating in the intermetallic bonding of the Pt-Cu and Pt-Co alloys.

• Journal of Oriental Neuropsychiatry
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• v.27 no.3
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• pp.185-196
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• 2016

Objectives: This study was undertaken by the department of Korean neuropsychiatry, to evaluate the effects of M&L psychotherapy and Korean Medical Treatments on hospitalized North Korean defectors.Methods: We treated two patients with indigenous Korean medical therapies (acupuncture and herb-medicine) and M&L psychotherapy. Beck's Depression Inventory (BDI), Insomnia Severity Index (ISI), Geriatric Depression Scale (GDS), Mini-mental state examination Korean Version (MMSE-K), and Visual Analogue Scale (VAS) were used to evaluate the patients.Results: Following observations were made after treatments. Case 1: the patient had significant improvement in Beck's Depression Inventory (BDI), Insomnia Severity Index (ISI), and Visual Analogue Scale (VAS). Case 2: similar improvements were observed. Here, the patient had undergone Geriatric Depression Scale (GDS), Mini-mental state examination Korean Version (MMSE-K), and Visual Analogue Scale (VAS). In addition, noticeable improvement was observed in other accompanying symptoms.Conclusions: These results suggest that M&L Psychotherapy and Korean medical treatments might be effective for treating the psychiatric and physical symptoms of hospitalized North Korean Defectors.

• Proceedings of the Korean Vacuum Society Conference
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• 2004.08a
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• pp.179-179
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• 2004

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.145.4-145
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• 1998