• 전기의세계
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• v.19 no.1
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• pp.1-10
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• 1970

The foundation for the theoretical establishment of the linear motor lies in the investigation of the magnetic flux distribution in its airgaps. Generally speaking, the linear motor is similar, in the principle of its operation, to the general induction motor. However, there are great differences in the aspects of its structure and characteristics, especially, in the fact that the formation of its travelling magnetic field depends on the method of its winding. This paper is written in order to introduce the method of calculating the air gap magnetic flux distribution on the basis of its ampere-conductor in the case that 2 phase winding is applied on its open magnetic circuit iron core, and to present the results of investigation of the pulsation in its travelling fields. the first and second example of winding show the case of travelling magnetic field with the constant amplitude except the end region. The third example deals with the configuration of coil-side displaced outside the core and which produce the increased flux density at the ends, but, on the contrary, forms the pulsated travelling field.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.118-119
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• 2019

The exterior finish not only has a relationship to the functionality of building, but also the spatial aesthetics and visual perception. Common exterior finishes are wood, stone or acrylic based and etc. However, these finishes have different attributes which can alter the quality of the architecture, such as durability, moisture and fire resistance. To make up for the short-comings of these materials, we have used iron based resources for optimization. However, iron materials are expensive, so they have limitations in general use. In this study, we have experimented with various forms of exterior finishes using cement, which is the most efficient and widely used building material with several economic advantages. We experimented with different materials to use as the formwork for the gloss of the cement matrix. As a result, the gloss show that order of urethane, steel, and wood material.

• BMB Reports
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• v.37 no.4
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• pp.394-401
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• 2004

The purpose of this paper is to suggest that the prominence of Haldane's explanation for enzyme catalysis significantly hinders investigations in understanding enzyme structure and function. This occurs despite the existence of much evidence that the Haldane model cannot embrace. Some of the evidence, in fact, disproves the model. A brief history of the explanation of enzyme catalysis is presented. The currently accepted view of enzyme catalysis -- the Haldane model -- is examined in terms of its strengths and weaknesses. An alternate model for general enzyme catalysis (the Shifting Specificity model) is reintroduced and an assessment of why it may be superior to the Haldane model is presented. Finally, it is proposed that a re-examination of many current aspects in enzyme structure and function (specifically, protein folding, x-ray and NMR structure analyses, enzyme stability curves, enzyme mimics, catalytic antibodies, and the loose packing of enzyme folded forms) in terms of the new model may offer crucial insights.

• ETRI Journal
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• v.33 no.6
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• pp.831-840
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• 2011

This paper focuses on codebook-based precoding for space-division multiple access/orthogonal frequency-division multiple access (SDMA-OFDMA) systems aiming to guarantee high throughput for their users as well as to mitigate interference to fixed satellite service (FSS). A systematic design of SDMA codebook for subband-based OFDMA is proposed, which forms multiple orthogonal beams with common spatial null in the direction of a victim FSS earth station (ES). The design enables both transmitter and receiver to independently construct identical codebook by sharing only on the direction angle of an FSS ES, which takes fewer overhead bits than Gram-Schmidt process, a general method satisfying our design criterion. A system-level throughput evaluation shows that the proposed precoding provides superior performance over existing spectrum sharing method, that is, subband deactivation. The spectrum sharing analysis shows that the proposed precoding, even with an estimation error of the direction angles of an FSS ES, causes lower interference than existing precoding, knockdown precoding.

• ETRI Journal
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• v.36 no.4
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• pp.609-616
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• 2014

Even though many computational methods (recursive formulae) for blocking probabilities in finite-capacity M/D/1 queues have already been produced, these are forms of transforms or are limited to single-node queues. Using a distinctly different approach from the usual queueing theory, this study introduces explicit (transform-free) formulae for a blocking probability, a stationary probability, and mean sojourn time under either production or communication blocking policy. Additionally, the smallest buffer capacity subject to a given blocking probability can be determined numerically from these formulae. With proper selection of the overall offered load ${\rho}$, the approach described herein can be applicable to more general queues from a computational point of view if the explicit expressions of random vector $D_n$ are available.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.20 no.1 s.32
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• pp.265-284
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• 2007

Introduction : There are three major forms of Epidermolysis Bullosa(EB) - EB Simplex(EBS), Junctional EB(JEB) and Dystrophic EB(DEB). DEB is divided into two groups that Dominant DEB(DDEB) and Recessive DEB(RDEB). RDEB has two types that Hallopeau-Siemens(generalized type) and mitis(localized type). Objects : This study was carried out to observe the progress of Recessive Dystrophic Epidermolysis Bullosa-mitis(RDEB-mitis) disease and find effective remedy. Methods: Both diagnosis and treatment were divided into three groups voluntarily. l. diagnosis - dermatic symptoms, mucosal symptoms, general symptoms 2. treatment - herbal medications, moxibustion, medicines used extemally(外用藥) Results : After treating 9 months, the condition of the patient grew better and the grades of severity of ROEB-mitis disease were lower at each diagnosis item. Conclusions : As above results, oriental medical treatments were very effective for this disease. But more case studies are necessary for establishing more effective diagnosis and treatment methods.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.13 no.3
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• pp.9-21
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• 2005

The stable motion has been judged by mathematical modeling of the conditions that a rocket flies flexibly to take an active part in atmosphere. In this paper, the rocket conditions consist of the air speed, thrust and automatic attitude control. Aerodynamic force, a critical trust and a critical air speed are determined by comparing mathematical knowledges with eigenfrequencies of vibration equation. And then rocket object model is designed. Parameters and eigenfrequencies are used in dimensionless forms for in general applications by eliminating restrictions such as dimension, weight and select of materials.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 1999.11a
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• pp.43-46
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• 1999

Today multi-item and small lot production has been applied to the general production system for consumers' needs. Therefore the production for consumers' needs have been product every moment, and buying have been made through various forms. But it is not easy for consumers to find the products which they want among many products. Furthermore although in the internet shopping mall many products can be presented to consumers, there are no ways to search fast the products which they want. This study has observed the fact that generally consumers' purchasing start with the image of products for their needs. So we suggest the way to show fast the most near products which consumers want in the internet by accepting Kansei words as product image.

• Journal of the Korean Society of Clothing and Textiles
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• v.26 no.8
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• pp.1153-1164
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• 2002

The purpose of this study is to find out the creative visual expression in fashion illustration through the previous general theories on creativity. The creative visual expression, in fashion illustration works, can be summarized eight categories as follows. There are 'maximization & minimization'to emphasize the illustrators'emotions and contemporary trends, proposed specially in body expression, 'inversion' seen as the forms of contra-perspective, upside-down, rearrangement of parts, diverted process, etc, 'Unusual uses'to add the effect of caricature, parody, and humor to the fashion illustration works, 'extraordinary connection'seen as the shapes of various combination between animals, plants, stuff, and man, 'concealment & elimination'used frequently in creative visual expression includes a deformed human body, an abstracted human body, an extreme value contrast, simple colors, and dress in silhouette, 'association'seen in various methods; comparing the similar shapes, describing a certain situation or details for analogizing the whole, ‘illusion’ expressed in surreal, mysterious, and fairy depictions and 'substitution'to imitate the composition and colors of masterpieces, copy the parts.

• Proceedings of the KIPE Conference
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• 2001.07a
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• pp.638-641
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• 2001

Connectorless power transmission and supply are the power transfer device revealed by resonant inverter or transformer using inductant device. Recently, on power supply have been going on frequently, so several power supply circuit forms are announced. But Compared with the circuit of previous paper, instead of the circuit composed of a simple sylinder Ferrit, I was manufacture in a sylinder that It was a double overlab to a sylinder and I was followed a double flux in inner flux path. Above all, for practicalization, supply circuit operation character analysis and development of controller should be preceded. According to this paper, power transmission and supply analyze characters and design control circuit like the analysis of general resonant inverter for power transmission. They compose the circuit to get sinusoid wave output voltage using pulse width modulation control mode. For Supply, output wave form through power track and power pick-up of magnetic inductance includes ripper component. So I intend to design the controller including filter and regulator, compare analyze theoretical result with real measurement value and then show you their practicality