• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.14 no.7
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• pp.669-676
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• 2003

In this paper, a novel design method for an ultra-wide band TEM horn antenna is proposed on the basis of parallel plate waveguide theory. A principle of TEM modes generation is analyzed and the characteristics of this antenna are experimentally investigated. The proposed TEM horn antenna has an exponentially tapered structure to increase matching bandwidth. Also, the designed TEM horn has shortened length but increased aperture so that the bandwidth for cutoff frequency is increased. The measured result show that the proposed TEM hem antenna has the frequency band of 75 MHz to 1200 MHz for VSWR less than 2.0 and the bandwidth of the TEM horn becomes more than twice comparing to that of a linearly tapered TEM hem. It is anticipated that the manufactured antenna is applicable to UWB systems for impulse response measurement.

• The Research Journal of the Costume Culture
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• v.2 no.1
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• pp.93-104
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• 1994

Nowadays computer technology is being applied in various areas of apparel design. In particular, since the task of pattern making is to be performed by a set of predefined drawing rules, the effect of computer application in pattern making will be significant, There have been a large number of studies on pattern making program. For instance, the previous studies have developed computer programs for pattern making of women's wear, men's wear, children's wear, Han-Bok, etc. Most of them have focused on the development of computer program for a particular kind of apparel only and, however, have disregarded the feasibility of developing a multi-purposed computer program so that is just can be modified to adopt for various styles. For example, by widening the hem-wide of the basic H-Line skirt and then connecting its waist line and widened hem-wide, we can draw the A-Line skirt. Therefore, we have developed a program which can make a pattern for the basic skirt and can mae, with a slight change of he program, other patterns for various style as well. The objective of this paper is to identify and organize modules which will be used for developing a general pattern making computer system. This general pattern making system is a computer program by which we can draw a variety of apparel styles. This system is restricted to skirt pattern making only. there presentation scheme used in organizing these modules is an AND-OR tree, the one being often used in representing a complex problem in artificial intelligence domain.

• Journal of Chest Surgery
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• v.25 no.7
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• pp.711-715
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• 1992

Massive hemoptysis is defined as pulmonary hemorrhage of more than 600ml to 800ml within 24hours. Among the many causes, the most common include pulmonary tuberculosis, abscess, bronchiectasis, cystic fibrosis bronchial carcinoma. Most acute episodes of hemoptysis last less than 24 hours and gradually subside. However, when the hem-optysis is massive, it carries a mortality rate of 50% to 100%. It is generally agreed that surgery is the treatment of choice for patients with massive hemoptysis. We had the one case of 39 year-old male with recurrent massive hemoptysis. In the past history, he had pulmonary tuberculosis 20 years ago but no chest trauma, Previous chest CT showed well defined cavitary lesion with calcification on RUL Under the bronchoscope finding, we indentified active bleeding from right upper lobe bronchus without end-obronchial lesion. Therefore, emergency thoracotomy was done with impression of hem-optysis due to pulmonary tuberculosis. But operative findings were as follows ; the 4th fractured rib was impacted into the lung parenchyme with severe adhesion and middle lobe was not inflated. So, Upper and middle lobectomy were performed. He was diagnosed finally by operative and pathological findings as massive hemoptysis due to impaction of fractured rib into the lung parenchyme and discharged without complication.

• Journal of the Korea Organic Resources Recycling Association
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• v.11 no.2
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• pp.86-96
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• 2003

This study was conducted to investigate use possibility of pharmaceutical byproducts(process sludge) and waste water sludges as raw materials of organic compost at Fertilizer Official Regulation of Fertilizer Management Law in 2002. All pharmaceutical byproducts were satisfied the standard levels of raw material regulated in organic compost, some waste water sludges were deficient in the level. The content of n-hexane extractable material(HEM) was in byproduct higher than in waste water sludge. This was presumed that the sludge with containing a lot of organic matter was high in HEM content. Of the whole microorganism flora, bacteria was mainly detected, and yeast and filamentous fungi took up less population which was fluctuated depending on the source of sludges. Most dominated bacteria were identified into Genus of Pseudomonas. Pseudomonas syringae and Rathayibacter bathayi was classified as plant pathogenic bacteria.

• Journal of the Korean Society of Clothing and Textiles
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• v.31 no.11
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• pp.1510-1519
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• 2007

This comparative study analyzes and compares tight skirt sewing methods which are found in the clothing configuration reference text books available in contemporary universities and which are used in commercially-available domestic consumer products. The study samples included 15 text books and 12 tight skirt consumer products of different brands on sale at three department stores in Seoul each of which had a belt, a back-centered zipper, and back double slits. The findings of the study are summarized as follows: First, text books mainly show very basic sewing methods of using zippers on both sides of the straight-lined waist belt. This indicates that it is necessary for such methods to be complemented so that they cover a recent variety of designs, materials, and sewing machines. For consumer products, the main sewing method is to use a curved waist belt and a console zipper in silhouette running across half the hipbone. Second, consumer products employ three different types of cutting and sewing methods for putting an inseam on the center of the back slit part: to leave the whole inseam hemmed in the back center, to cut the left side of the inseam to the upper part of the back slit, and to cut the inseam to both the upper parts of the back slit. However, a method shown in most of the sampled text books is to cut the inseam of the back center to both the upper parts of the back slit. Third, the way of finishing a bottom edge hem in the text books is to do slip-stitch, herringbone stitch, and slinting hemming, in order after doing over-lock stitch, or to cut the hem on the bias and then slip-stitch, while for the consumer products the most frequently used sewing method is to finish the bottom edge hem by doing secoui-stitch. Finally, while in the text books the method of stitching darts and tucks is used for lining, the main lining method used in consumer products is to make tucks only. Also in the way of stitching the side seams of lining or the seams of the back center, there is a difference between the two sample groups of text books and the consumer products: while the former suggests using both open seams and over-lock stitch, the latter is found to finish the seams using an over-lock stitch only.

• Proceedings of the Korea Association of Information Systems Conference
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• 1996.11a
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• pp.184-195
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• 1996

본 논문에서는 게이트의 길이가 0.25㎛인 GaAs HEM를 이용하여 11.7㎓-12.2㎓ 대역 위성통신용 수신기를 설계하였다. 설계된 수신기의전체이득은 38㏈이상, 잡음지수 1.8㏈이하, 입출력단의 반사손실은 -10㏈이하를 보였다. 수신기는 저잡음증폭기(LNA), 중간주파수증폭기(IFA), 믹서, 국부발진기(LO)로 구성되어 있으며 LO 주파수와 IF 주파수는 각각 10.75㎓와 0.95㎓-1.45㎓이고 칩의 크기는 1.7㎜×2.5㎜이다.

• Proceedings of the Optical Society of Korea Conference
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• 2002.07a
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• pp.168-169
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• 2002

일반적인 광섬유가 실리카로 만들어진 클래딩과 이보다 약간 굴절률이 높은 코어로 구성되어 있는 것과는 달리 광자결정 광섬유(photonic crystal fiber 또는 다공성 광섬유(holey fiber))는 코아와 클래딩이 순수 실리카로 구성되어 있다 클래딩의 효과를 주기 위해 광섬유 축을 따라서 규칙적인 공기구멍 다발을 형성하여 준다. 광자결정 광섬유는 특이한 광학적 특성 때문에 최근에 활발히 연구되어 지고 있다. 공기구멍의 구조를 조절함으로써 넓은 파장 영역에서 단일 모드로 진행하고(1), 아주 큰 분산을 갖게 할 수 lT고, hem 반경을 조절 할 수 있으며, 특이한 분산 특성과 이의 조절이 가능하다. (중략)

• Journal of the Korean Society of Costume
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• v.38
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• pp.73-82
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• 1998

There are two styles of Yoo(; ) Sang(;裳) in Koryo Women. One they wore the Snag(;裳) over the Yoo(; ), the other wore the Yoo(; ) over the Sang(;裳). In the Yoo(; ), Double breast styly was used for the adjustments of these clothes, Neckline and hem line were substituted by rectangular collar (;목판깃). Knot-button, Coat-string(;Okgolum), White straight collar (DongJung), side slit were used. In the Sang(;裳), Chimaheri(;치마허리)was mades of another fabric and Chima-string was dropped.

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.122-125
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• 2003

Ultrasonic wave has three classes of applications such as communication, inspection, imagination and processing. In processing, ultrasonic is used web bonding for nonwovens with applications including floppy disks, medical devices and many automotive Part. The important components of ultrasonic system are power supply, converter, booster, hem, anvil roller, pressure system and hold time controller. (omitted)

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05a
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• pp.463-468
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• 1998

수직 관다발형 비등관에서의 밀도파 진동 및 유동 폭주형 이상유동 불안정성을 해석하기 위하여 선형화 기법 및 D-partition 방법론에 근거한 해석 코드(ALFS)를 개발하고 기존 실험자료 분석을 통해 코드의 예측 성능을 평가하였다. 그 결과 이상유동이 평형상태에 있는 것으로 가정하는 가장 단순한 모델인 HEM은 전반적으로 유동 불안정성 발생 시점의 열출력을 실험치보다 약 20% 정도 낮게 예측하였으며, 이상 유동의 속도 및 온도의 비평형 상태를 고려하는DEM과 DNEM에 의한 예측 결과는 7∼15%의 평균 오차 범위에서 실험 자료를 예측하는 것으로 나타났다.