• 한국산학기술학회논문지
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• 제13권9호
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• pp.4126-4130
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• 2012

본 논문에서는 고주파수 무선 신호 전송을 위한 AC 커플링(Coupling) 기반의 평면 나선형 인덕터를 제안하고, 이에 대한 다양한 구조의 인덕터를 설계, 모델링 및 특성을 분석하였다. 커패시턴스의 의한 영향을 줄이기 위해서는 두 박막 인덕터가 서로 평행하게 위치함으로서 인덕터 간의 커패시턴스를 줄여야 한다. 이를 위해 두 가지 구조를 제안하였다. 첫 번째 구조는 inter-diagonal 구조로 평행한 두 인덕터의 도선 부분이 겹치지 않게 만든 구조이다. 이 구조의 경우 비록 평행하게 겹치지는 않지만 도선의 두께와 폭이 좁으므로 서로 엇갈리는 위치에 도선이 위치하더라도 실제 커패시턴스의 변화가 작아서 전체적인 S-파라미터의 특성이 크게 변하지 않았다. 두 번째 구조는 On-chip형 구조로 두 박막 인덕터가 평행하게 존재하지만 마주보지 않게 사선형으로 배치한 구조이다. 이 구조의 경우 박막 인덕터 간의 수평거리가 길어짐에 따라 두 번에 걸쳐서 일어나는 공진이 한 번으로 줄어드는 것을 볼 수 있는데, 이는 두 인덕터 간의 거리가 멀어짐으로 인해 박막 인덕터 간의 커패시턴스 영향이 점점 줄어들기 때문이다.

• 한국콘텐츠학회논문지
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• 제11권6호
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• pp.197-204
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• 2011

미디어의 발전 속에서 문자의 사용은 다양한 방법으로 발전해왔다. 인터넷과 모바일의 급속한 성장에 따라 디지털 환경에서 문자언어의 새로운 역할인 시각화와 감정전달이 대두되었다. 의사소통의 편의성을 위한 도구의 한 부분으로 생겨난 이모티콘은 비대면 커뮤니케이션 상황에서 소통문화의 효과적 역할을 한다. 특히 창제 원리상 소통과 나눔의 의미를 내포하며, 단순명료한 형태적 특성을 갖는 한글을 조합하여 만들어진 한글 이모티콘은 그 구조적, 조형적 특성으로 인해 조합과 활용에 편리하여 디지털 커뮤니케이션 환경에서 중요한 시각적 요소의 역할을 한다. 한글 이모티콘은 우리 한글문화의 한 부분이며 매체의 발달에 따른 시각언어의 글로벌화 현상에 비추어 볼 때 국제적 커뮤니케이션 도구로써의 가능성도 충분하다. 개인미디어의 보편화와 미디어의 주체적 사용자의 변화 속에서, 타이포그래피 미디어의 한 부분인 한글 이모티콘의 활용증가와 공공성의 문제를 검토하고자 한다.

• 한국실내디자인학회논문집
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• 제24권6호
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• pp.79-86
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• 2015

This study started from the concern for Bjrake Ingels, an emerging architect in the architecture circle, who is creative and popular. Recently, the architecture field provides architects with a foundation to express a process on a new form creation through various new expressive languages, design concepts, and methods. The global Danish group BIG(Bjarke Ingels Group) develops a story by their distinctive architectural language. The storytelling is being used in various fields and now the tool called 'story' is settling down as an important element in the life that human lives. Bjarke Ingels leading the group BIG aims for the form expression by the scientific analysis and adaptation after being affected by Danish regional background and OMA. It creates a form to share stories with local members by visually simplifying the region, culture, environment, social phenomenon, economy, and politics that are invisible and do not have the form in the modern society. The elements and expressive features of the space storytelling include locality, cultural, natural environment, and connectivity which are the content structure(story) that enables you to intervene in the story according to the main agent to imagine a new space. The expressive element includes the watching moving line story of the successive, hierarchical, and organic structures which are constructive elements creating various spaces through the mixture, transmutability, and relocation of the program and inducing users to the space. The space storytelling is composed of the symbolism, community, and eco-friendliness to appear diversely through BIG's case analysis. This study will have significance that it drew a method and feature looked at by many contemporary architects from the storytelling viewpoint in the form-creating process, classified the form-creating process through a new storytelling type, and showed a possibility on the development of various methodologies.

• 한국정보전자통신기술학회논문지
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• 제9권6호
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• pp.539-545
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• 2016

본 논문에서는 평면형 마이크로스트립 공진기를 이용한 고주파 발진기의 단점인 위상잡음 특성을 개선하기 위해 접지된 결합 C형 공진기를 제안하였다. 제안된 공진기를 이용하여 위상잡음 특성 개선 효과를 나타내기 위해 발진기를 설계하여, 9.8 GHz 기본 주파수에서 4.87dBm의 출력과 -84.7 dBc@100kHz의 위상잡음 특성을 나타내었다. 다음은 제안된 공진기에 버랙터다이오드를 추가하여 전압 제어발진기를 구현하였다. 전압 제어발진기의 특성은 최소 9.7807 GHz에서 최대 9.8145 GHz까지 33.8 MHz 정도의 튜닝범위를 가지고, -115~-112.5 dBc/Hz@100kHz의 위상잡음 특성을 갖는다. 본 논문의 발진기는 평면형 구조로 쉬운 작업공정과 소형화 특성 때문에 MIC 또는 MMIC 분야의 설계에 응용될 수 있을 것이다.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제21권2호
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• pp.101-110
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• 2018

Purpose: Functional constipation (FC) is a common gastrointestinal (GI) problem affecting children's well-being and quality of life. Although polyethylene glycol (PEG) is recommended as the first line therapy, it is not always applicable in lower socioeconomic populations. Hence, this study aimed to compare clinical courses of FC in children treated with different medications in order to identify prognostic factors related to treatment outcomes. Methods: We reviewed the medical records of patients aged ${\leq}15$ years diagnosed with FC according to the Rome IV criteria from 2007 to 2015 at the GI clinic, Songklanagarind Hospital. Baseline characteristic, medical history, and treatment outcomes were collected at first and subsequent visits. Results: Exactly104 patients (median age at diagnosis, 2.8 years) were diagnosed with FC. The number of follow-up visits per patient ranged from 1 to 35. The median duration of follow-up was 18.0 months (range, 6.0-84.2 months). PEG was given to 21% of patients. During the follow up period, 76% of patients experienced first recovery with a median time to recovery of 9.8 months. There were no significant differences in time until first recovery and relapse between patients who received and those who did not receive PEG (p=0.99 and 0.06, respectively). Age >6 years, normal defecation frequency, no history of cow's milk protein allergy, and use of laxatives were associated with successful outcomes. Conclusion: Treatment outcomes between patients who had and never had PEG demonstrated no significant difference in our study. Hence, current practices in laxative prescriptive patterns may be effective.

• 자원환경지질
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• 제16권2호
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• pp.111-123
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• 1983

The studied area is situated in tho southern part of the Ogcheon fold belt, where the "Ogcheon Group" is widespread with Jurassic and Cretaceous intrusions. The regional stratigraphy may be divided into three formations, the lower pebble bearing phyllitic, the middle dark grey phyllitic, and the upper black phyllitic formations. For the purposes of the present study, the area has been partitioned to three structural subareas based on major fold axes and fault line. The main subjects of the research have been discussed from two different points, multiple deformation and minor-micro fold styles. The former is analyzed by pebble elongation, folding and lineation in a pebbly formation as well as schistosity, crenulation cleavage and crenulated lineation in the phyllitic formation. The later describes the characteristic features of fold style in each formation and structural subarea. Although minor fold axes within broad pelitic rocks usually tend to trend northeast and to plunge northward, most of these were probably formed by two stages, first a similar fold phase and second a kink fold phase. Measured structural elements indicate that crenulation cleavage in phyllite formed parallel to fold axes of folded pebble followed a NE phase of first deformation and a fold axes of pebbles diagonal to bedding of phyllite are represented by a NW phase of a second deformation. Microscopically, quartz and mica grains form a micro fold enabling one to establish tectonic levels which occur in different deformation modes in each stratigraphic sequence. Microtextures such as crenulation cleavage, kink band, aggregate band of mica and pressure shadows of porphyroblast of quartz related to qarnet and staurolite may suggest the time relation of crystallization and tectonism. The result of this study may conform that three deformation phase, NE first phase-NE second phase-NW phase, occurred in the area.

• 만화애니메이션 연구
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• 통권12호
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• pp.56-72
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• 2007

본 연구에서는 클러스터로 지정된 춘천의 애니메이션 산업의 특징을 분석하였다. 내적으로는 다른 지역의 클러스터와 차별화하기 위해 정책수행기관의 역할을 변화시키고 공동제작을 강화함과 동시에 실질적인 콘텐츠 제작단지의 건립을 시도함으로서 자체적인 문화콘텐츠 산업을 발전시키려 하고 있다. 한편, 외적으로는 공동제작을 주로 해외와 시도하면서 이러한 연결을 단순한 제작의 네트워크가 아닌 산업과 시장이 유기적으로 연결된 하나의 블록을 형성하려 하고 있다. 지방자치제 이후 자체적인 클러스터 운영이 국내의 다른 클러스터의 모습이나 성격과는 차별화되면서 국제적으로도 자체적인 네트워크를 이루어가고 있다는 점에서 의의가 있다.

• 조명전기설비학회논문지
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• 제20권8호
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• pp.22-29
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• 2006

IEC 규격을 기반으로 최근에 개정된 KS 규격에 따라 등전위 접지시스템이 중요하게 자리매김 하였으며, 전원시스템의 안정성을 위해 서지보호소자의 사용이 급격히 증가하고 있다. 내재된 비선형 저항성분으로 뛰어난 V-I 특성을 가지는 $Z_nO$ 바리스터는 서지전압을 제한하여 서지전류로 환류시키기 위해 전원용 보호기로 주로 사용되고 있다. 이러한 $Z_nO$ 바리스터는 교류 전원선에 접속하기 위해서 몇 가지 회로조합 형태로 구성되어 사용되는데, 사용자는 바리스터를 직렬 혹은 병렬로 조합하여 사용함에 있어서 안전에 직접적으로 관련된 기능이나 열적 안정성을 포함한 많은 것들을 고려하여야 한다. 본 논문에서는 40[kA]의 전류용량을 가지는 단일 바리스터 소자와 직렬 혹은 병렬 회로조합의 바리스터에 대하여 잔류전압, 방전전류, 누설전류, 표면온도를 측정하여 각각의 조합형태에 따라 안정성을 비교하였다.

• 한국산업융합학회 논문집
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• 제23권3호
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• pp.491-498
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• 2020

Recently, In the production line of batteries, charge and discharge tests are essential to verify battery characteristics. In this case, the battery charging uses a unidirectional AC/DC converter capable of output voltage and current control, and the discharge uses a resistive load. Since this method consumes energy during discharge, it must be replaced with a bi-directional AC/DC converter system capable of charging and discharging. Although it is difficult to replace the connected inverter part of the bi-directional AC/DC converter system due to the high cost, the spread of the solar-connected inverter rapidly increases as the current solar supply business is activated, and thereby the solar-connected type Inverter prices are plunging. If it can be used as a power converter for battery discharge without program modification of the solar-powered inverter, it will have competition. In this paper, propose a new battery discharge system using a combination of a photovoltaic DC/DC simulator and photovoltaic PCS using a battery to be used as a power converter for battery discharge without program modification of a low-cost photovoltaic inverter. In addition, propose an optimal solar characteristic curve for the stable operation of PCS. The validity of the proposed system was verified using a 500[W] class solar DC/DC simulator and a solar PCS prototype.

• Asian Journal of Atmospheric Environment
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• 제6권1호
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• pp.14-22
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• 2012

This paper is focused on the comprehensive and detailed interpretation for the chemical transformation of individual Asian dust (hereafter called "AD") particles during long-range transport from source regions to receptor area. A multi-stage particle sampler was operated at a ground-based site in Taean, Korea directly exposed to the outflow of air masses from China during AD period in April 2003. Both quantitative and qualitative analyses for size-classified individual particles were carried out by a microbeam X-ray fluorescence (XRF) method and a microbeam Particle Induced X-ray Emission (micro-PIXE), respectively. Among major characteristic elements, the elemental masses of soil derived components, sulfur, and chloride varied as a function of particle size showing the monomodal maximum with a steeply increasing at 3.3-4.7 ${\mu}m$ particle size. Although the details on chemical composition of AD particle collected on a straight line from source area to our ground-based site are needed, a large amount of Cl coexisted in and/or on AD particles suggests that AD particles collected in the present study might be actively engaged in chemical transformation by sea-salt and other Cl containing pollutants emitted from the China's domestic sources. Through the statistical analyses it was possible to classify individual AD particles into six distinct groups. The internally mixed AD particles with Cl, which has various sources (e.g., sea-salt, coal combustion origin HCl, gaseous HCl derived from the adsorption of acids to sea-salt, and Cl containing man-made particles) were thoroughly fractionated by the elemental spectra drivened by the double detector system of micro-PIXE.