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직교형으로 배열된 2개의 1x2서브-어레이를 이용한 433MHz에서 동작하는 RFID 리더용 안테나 설계
김종성,박승모,최원규,성낙선,Kim Jong-Sung,Park Seung-Mo,Choi Won-Kyu,Seong Nak-Seon 대한전자공학회 2005 電子工學會論文誌-TC (Telecommunications) Vol.42 No.9
본 논문에서는 433MHz에서 동작하는 RFID 리더용 직교형 안테나에 관하여 기술하였다 본 이중편파 안테나는 1x2 서브어레이를 기본으로 하여 급전회로망의 위상을 동위상 또는 반대 위상을 갖도록하여 2개 안테나의 방사체에서의 상대적인 전류 분포를 제어하여 빔 패턴에서 편파를 수직 및 수평으로 복사가 가능토록 하였다 단일 안테나는 역-에프형 구조를 이용하였으며 위상차에 따른 단락점에서부터 개방점 까지의 전류의 변화가 궁극적으로 수직 및 수평 편파가 제어되도록 하였다 이중입력에 대한 안테나의 이득은 수직 및 수평 편파에 대하여 2.7 및 0.4 dBi를 나타내었으며, 포트간 아이솔레이션은 25dB 이하의 특성을 나타내었다. An orthogonal antenna is presented for reader application of radio frequency identification (RFID) at 433 MHz. Two 1x2 sub-arrays are orthogonally placed on a ground plane and two different feeding networks are applied to control horizontal and vertical radiation current flows for each sub-array, respectively. Inverted-F structures are used as radiation elements and can generate two linear polarizations by relative current distribution of radiators forming sub-arrays. Antenna gains are 2.7 and 0.4 dBi and isolation between two input ports is less than 25dB.
김종성,김경준,Kim, Jong-Seong,Kim, Gyeong-Jun 대한한방안이비인후피부과학회 2001 한방안이비인후피부과학회지 Vol.14 No.1
Acne is a chronic, inflammatory disorder that mainly affects teenagers and young adults. The disease has many causes, blocking hair follicle or sebaceous gland. Acne is not life threatening, but quality of a patient is compromised. Therefore, the patient needs an active treatment. With this in mind, I witnessed some noticeable improvement among the patients by prescribing Myunposan(面疱散). Here are the findings of my experience. 1. Out of acne patients who visited Oriental Medicine Hospital of Kyung-Won University(暻園大學校서울韓方病院) during September 2000 - December 2000, 8 patients whose prognosis is dramatic were subjects. 2. Myunposan(面疱散) deems effective in removing wind(祛風), unnecessary metabolite(祛痰), heat(淸熱), and draining pus(排膿), and preventing evil effects(解毒). 3. In the case of those 8 success stories as a result of taking Myunposan(面疱散), in the order of redness, pain, iching, and fever, symptoms were quick to disappear, and papula, pustula, etc got better albeit slower. 4. Depending on general symptoms, oriental medicine and acupuncture treatment on top of taking Myunposan(面疱散), symptoms were even quicker to go away and improved.
김종성,허유,Kim, Jong-Seong,Huh, You 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.4
This research reports on the bundle drafting characteristics on the basis of a mathematical model describing the bundle flow dynamics. And the model parameters were experimentally measured or estimated. The kinematic viscosity of bundle was measured experimentally and the velocity variance parameter was estimated by comparing results from the experiment and from the simulation. The step response of the output bundle thickness to a step change in the draft ratio was applied. The kinematic viscosity of bundle was confirmed to be in the range between $0.5{\times}10^6$ and $8.0{\times}10^6cm^2/s$, which depends on the process conditions. As the draft ratio increases, the viscosity decreases dramatically in a low level of the draft ratio, but a draft ratio higher than 10 causes a very slow change in the viscosity, which is again affected by the roller setting. The kinematic viscosity remained, however, almost unchanged in the level of the roller setting longer than 45 mm. Under the draft ratio larger than 10, a high viscosity and a low velocity variance of constituent fibers had the effect to make the stability area narrower. Therefore the analysis results of bundle flow stability indicate that the draft ratio should be adjusted as small as possible in the high draft ratio level larger than 10 and the entanglement of the bundle be minimized for a large value of the velocity variance parameter, if the bundle flow system is maintained in a dynamic stable state.
김종성,김형중,변은정,구교진,현창택,Kim, Jong-Seong,Kim, Hyoung-Joong,Byun, Eun-Jung,Koo, Kyo-Jin,Hyun, Chang-Taek 한국건설관리학회 2007 건설관리 : 한국건설관리학회 학회지 Vol.8 No.3
건축물이 고층화, 대형화되면서 철골구조를 기본골조로 채택하는 경우가 많아지고 있으며, 철골공사의 품질관리는 사전계획단계부터 이루어지며, 단계별 참여자간의 업무 구분 및 연계가 매우 중요하다 이에 본 연구는 철골공사의 품질관리를 보다 원활하게 수행하기 위하여, 기존 철골공사 품질관리업무를 기반으로 업무간 상호관계 및 입출력 정보를 고려한 품질관리 업무 프로세스 모델을 개발하고자 한다. As higher and bigger buildings, steel structure is so for a basic building structure. Quality management of the steel frame work is started from pre plan phase. And classification and relation of works is very important in quality management. The purpose of this study is developing a quality management model for the better quality management in a steel frame work. This model consider a interrelationship of works and $input^{\circ}{\S}utput$ information, and based on the actual condition of current quality management.