• The Journal of Korean Institute of Communications and Information Sciences
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• v.21 no.7
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• pp.1668-1676
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• 1996

This paper presents the evaluation of an angular spectrum-based method used to calculate scattering pattern of a three-dimensional object modelled as a collection composed of vertical sectional two-dimensional images. This is done via comparing a proposed method with two existing methods, i.e., a Fresnel hologram method and a ray-tracing method, in terms of computatioal complexities and reconstructed results. Maathematical derivations for each methods are reviewed and implementing procedures are described in detail, along with the amount of computaions required from the implementation point of view, rather than from the mathematical point of view. We show simulation results in which the Fresnel holoram method dose not exhibit promising results although it requires the least computation. Moreover, it is also shown that the proposed method, even with much less computational requirement than the ray-tracing method, produces good performances asmuch as the ray-tracing method does.

• Journal of Industrial Technology
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• v.18
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• pp.443-452
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• 1998

The future water quality of Youngwol Dam was predicted using FEMWASP. In the this study, point and non-point source in the basin was investigated in detail, and future pollutant loading was computed by various prediction technique. The water quality of 29 sites was analyzed over four seasons. FEMWASP was used to predict future water quality of Youngwol lake and downstream of proposed dam. Future water quality of Youngwol lake was predicted to configure eutrophication status, management criteria was suggested to minimize the pollution problems coming from future eutrophication. Discharge rate of dam was decided as 30CMS to conserve the water quality, and overall design of dam was changed.

• Proceedings of the KIEE Conference
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• 2007.11a
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• pp.138-139
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• 2007

The use of conventional Twyman and Fizeau interferometers inevitably fails in testing high precision optics because of errors always existing in reference elements producing the reference wavefront. Therefore it is necessary to apply to this task the interferometers of a radically new type, which are able to produce perfect reference wavefront with the help of light diffraction by a small obstacle or pinhole. In this paper new theoretical approaches and schematics of point diffraction interferometers are considered in detail with paying attention to constructive reliability. Such interferometers do not use reference optical surfaces and readily provide adequate estimation of errors and aberrations value of 0.01 wavelengths.

• Journal of Acupuncture Research
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• v.38 no.3
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• pp.242-244
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• 2021

LI15 is an important acupuncture point to treat shoulder pain. There are 4 needling methods for LI15 in the textbook; 1 method requires the insertion of the needle horizontally between the acromion and the great tuberosity of the humerus with the arm lowered for supraspinatus tendonitis. This method is also applicable for all conditions of rotator cuff disease, but it has not previously been described in detail. Providing X-ray scans and describing needle direction and depth of insertion will provide evidence for needling with the arm down as an effective stimulation of the subacromial space. Firstly, for this technique, with the arm raised, a concave point is located between the front edge of the acromion and the humerus, and the lower upper arm. Secondly, the acupuncture needle is inserted slightly posteriorly towards the supraspinous fossa, in the direction of the supraspinatus tendon and to a depth of 30-40 mm.

• Journal of The Korean Society of Integrative Medicine
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• v.1 no.1
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• pp.45-59
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• 2013

Purpose : This study was designed to investigate the satisfaction of clinical practice for in the occupational therapy department and to provide the basic materials for improvement the curriculum of clinical practice. Method : This research period was from May 10. 2012 to May 31. 2012. And the subject of was were belonging to occupational therapy department who finished clinical practice. Results : The research result is as following. As for the satisfaction of the clinical practice, the average point was 3.16 for 5, which was regular satisfaction. The satisfaction of clinical practice content point was 3.47 for 5. In detail, the item of 'clinical practice made us a new experience in relation to curriculum at college' scored 4.01, the highest. By contrast, the internal conflict during the clinical practice scored 2.63. In detail, the answer "I didn't feel sorry for failing this training" scored 2.4, which scored lowest. Conclusions : As the result of this research, students have feel the clinical training is the significant process for being a occupational therapist, and they also have satisfy what they experienced. And we can also tell that some of them have trouble because of the gap between the theory and clinical practice. To improve these problems, students should have confidences by preparing their clinical practice and external voluntary. Furthermore, for better clinical practice, we hope that the study on preparations for clinical practice will continue.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.8
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• pp.3470-3476
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• 2012

In this study, for cadastral surveying specified in current relevant legislation, regulations of allowable error tolerance and applicable equipments, accuracy in the relevant regulations and applicable regulations were comprehensively studied. Based on them, the objective was to develop performance standard for cadastral surveying equipments satisfying allowable error tolerance of cadastral surveying specified in the special law for cadastral re-survey. The study results are as follows. By comparing current legislation for performance and allowable error tolerance of applicable equipments with provisions of the special law for cadastral re-survey, analyzed were where performance of equipments needs to be improved on cadastral re-survey project. Based on them, as primary control point surveying and detail surveying were separated, performance standard of equipments were presented. Results of this study may be utilized as basic materials for supply and demand program of surveying equipments on establishment of the basic plan for cadastral re-survey project.

• Journal of Power Electronics
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• v.18 no.2
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• pp.332-342
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• 2018

This paper proposes a parameter design method for multi-element resonant converters (MERCs) with a unique resonant zero point (RZP). This method is mainly composed of four steps. These steps include program filtration, loss comparison, 3D figure fine-tuning and priority compromise. It features easy implementation, effectiveness and universal applicability for almost all of the existing RZP-MERCs. Meanwhile, other design methods are always exclusive for a specific topology. In addition, a novel dual-CTL converter is also proposed here. It belongs to the RZP-MERC family and is designed in detail to explain the process of parameter selection. The performance of the proposed method is verified experimentally on a 500W prototype. The obtained results indicate that with the selected parameters, an extensive dc voltage gain is obtained. It also possesses over-current protection and minimal switching loss. The designed converter achieves high efficiencies among wide load ranges, and the peak efficiency reaches 96.9%.

• Structural Engineering and Mechanics
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• v.76 no.6
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• pp.675-685
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• 2020

As the classical response surface method (RSM), the polynomial RSM is so easy-to-apply that it is widely used in reliability analysis. However, the trade-off of accuracy and efficiency is still a challenge and the "curse of dimension" usually confines RSM to low dimension systems. In this paper, based on the univariate decomposition, the polynomial RSM is executed in a new mode, called as DPRSM. The general form of DPRSM is given and its implementation is designed referring to the classical RSM firstly. Then, in order to balance the accuracy and efficiency of DPRSM, its adaptive order revision around the most probable point (MPP) is proposed by introducing the univariate polynomial order analysis, noted as RDPRSM, which can analyze the exact nonlinearity of the limit state surface in the region around MPP. For testing the proposed techniques, several numerical examples are studied in detail, and the results indicate that DPRSM with low order can obtain similar results to the classical RSM, DPRSM with high order can obtain more precision with a large efficiency loss; RDPRSM can perform a good balance between accuracy and efficiency and preserve the good robustness property meanwhile, especially for those problems with high nonlinearity and complex problems; the proposed methods can also give a good performance in the high-dimensional cases.

• Steel and Composite Structures
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• v.46 no.2
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• pp.237-252
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• 2023

The article describes the development of a novel dissipative bracing connection device (identified by the acronym DRBrC) for concentrically braced frames in steel and composite structures. The origins of the device trace back to the seminal work of Kelly, Skinner and Heine (1972), and, more directly related, to the PIN-INERD device, overcoming some of its limitations and greatly improving the replaceability characteristics. The connection device is composed of a rigid housing, connected to both the brace and the beam-column connection (or just the column), in which the axial force transfer is achieved by four-point bending of a dissipative pin. The experimental validation stages, presented in detail, consisted of a preliminary testing campaign, resulting in successive improvements of the original device design, followed by a systematic parametric testing campaign. That final campaign was devised to study the influence of the constituent materials (S235 and Stainless Steel, for the pin, and S355 and High Strength Steel, for the housing), of the geometry (four-point bending intermediate spans) and of the loading history (constant amplitude or increasing cyclic alternate). The main conclusions point to the most promising DRBrC device configurations, also presenting some suggestions in terms of the replaceability requirements.

• Journal of Acupuncture Research
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• v.20 no.2
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• pp.195-203
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• 2003

Objective : In this thesis we researched ${\ll}$Huangdimingtangjing(黃帝明堂經)${\gg}$ Methods : We refered to ${\ll}$Mingtangkongxuezhenjiuzhiyao(明堂孔穴鍼灸治要)${\gg}$ in ${\ll}$Huangdijiayijing(黃帝甲乙經)${\gg}$ and ${\ll}$Huangdineijingmingtang(黃帝內徑明堂)${\gg}$ Results and Conclusions : ${\ll}$Huangdimingtangjing(黃帝明堂經)${\gg}$ was written between West-Han(西漢) dynasty and East-Han(東漢) dynasty which was a summarized book about acupuncture point before Han(漢) dynasty. 1. "MIngtang(明堂)" means originally the hall where the emperor carried out politics but became a pronoun of acupuncture point in the field of Oriental medicine. 2. ${\ll}$Huangdimingtangjing(黃帝明堂經)${\gg}$ contains Five-elements theory which is specific property of Han(漢) dynasty. A many same named acupuncture point gathered not until Wu(武) emperor. The acupuncture point named "Jimen(期門)" which is the name of a military officer in Wu(武) emperor and cannot be found in ${\ll}$Huangdineijing(黃帝內徑)${\gg}$, I contains "long(隆)" which is the name of Shang(傷) emperor. As such it was written between West Han(漢) dynasty and Esst Han(漢) dynasty. 3. ${\ll}$Huangdimingtangjing(黃帝明堂經)${\gg}$ can be assumed the original edition by ${\ll}$Migtangkongxuezhenjiuzhiyao(明堂孔穴鍼灸治要)${\gg}$ in ${\ll}$Huangdijiayijing(黃帝甲乙經)${\gg}$ and ${\ll}$Huangdineijingmingtang(黃帝內徑明堂)${\gg}$ 4. The scholarship value of ${\ll}$Huangdimingtangjing(黃帝明堂經)${\gg}$ is rich in acupuncture point which described in detail futher more made possible of wide treatment. And also it referred a subordination of five shu(兪) acupuncture point ${\ll}$Huangdineijing(黃帝內徑)${\gg}$.