• 한국구조물진단유지관리공학회 논문집
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• 제24권5호
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• pp.111-118
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• 2020

본 연구에 사용된 U-형 복합보는 슬래브는 철근콘크리트구조로 되어 있고, 슬래브를 지지해 주는 보는 철골구조와 철근콘크리트구조, 그리고 U-형 강판으로 이루어져 있다. U-형 복합보는 시공성이 우수하고 낮은 층고와 장경간이 가능하기 때문에 공작물 주차장으로 사용하기 위한 목적으로 개발되었다. 시공성 향상을 위해 U-형 복합보 단부는 규격화된 H형강으로 계획하여 기둥에 직접 접합시키고, 강재 물량을 감소시키기 위해 U-형 복합보의 중간 부분에는 H형강 대신 얇은 강판(t=6)을 사용하여 U자형 형태로 접은 U-형 강판으로 구성되어 있다. U형 강판이 위치하는 복합보 중앙부에는 보의 춤을 작게 계획함으로서 공작물 주차장의 제한 높이에 만족하도록 계획할 수 있다. 낮은 보의 춤은 층고 단축에는 유리하지만 휨성능에는 저해 요인이 되기 때문에 춤 변화에 따른 구조성능을 파악하는 것이 중요하다. 또한, U-형 복합보는 철골구조와 철근콘크리트구조 및 U-형 강판이 혼합되어 있기 때문에 일체성 확보가 구조성능을 확보하는데 큰 영향을 준다. 따라서 본 연구에서는 U-형 복합보의 춤을 변화에 따른 구조성능을 파악하기 위한 구조실험을 실시하였다. 실험체는 일반주차장용으로 계획된 실험체를 기준실험체로 하여 춤을 변화시킨 2개의 실험체를 포함하여 총 3개를 계획하였다. 실험결과 춤을 크게 계획한 실험체가 기준실험체보다 항복강도, 최대강도, 에너지 등 구조성능이 우수하게 나타났다.

• 복식문화연구
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• 제12권6호
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• pp.1021-1030
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• 2004

The purpose of this study was to develop and make the head form by setting the region of the head for detailed measurement of the head to make the type of closely fit hat and typifying the head form of Korean women's with each region of the head based on the measurements of each region of the head according characteristics. A total of 285 Korean women's in the age group of 18 to 35 years old. It were measured through the direct measurement method by selecting 67 measurement items. As a result of the findings obtained from cluster analysis could be classified into 3 type. Type 1($46\%$) is U-shaped form, that is high in head height on sides and circumference is smallest, whose facial region and occiput is flattest of three types. Type 2($22.4\%$) is inverted triangle form, that is flat in head ridge, low in head height on sides and wide in the frontal width. Type 3($31.6\%$) is oval form, that is largest in size, has the projected occiput and is of three-dimensional form.

• 한국통신학회논문지
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• 제29권2A호
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• pp.195-201
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• 2004

본 논문에서는 5.15-5.35GHz 대역의 무선 LAN용 U-슬롯 Bow-Tie 마이크로스트립 안테나에 관하여 연구하였다. Bow-Tie 패치에 U-슬롯을 갖도록 하였으며 접지면과 기판사이에 공기층을 삽입하여 VSWR<1.2 에서 적절한 대역을 얻고자 하였다. 설계시 주요 파라미터는 U-슬롯의 길이, 폭, 위치와 공기층의 두께 및 급전위치였으며 최적화된 파라미터를 가지고 실제 제작 및 측정하였다. 제작된 안테나의 측정결과로 공진주파수는 5.28GHz이고, VSWR<1.2에서 7.76%의 대역폭과 4∼7dBi의 이득을 얻었다. Elevation과 Azimuth에서 각각 73.63$^{\circ}$와 65.08$^{\circ}$로 나타났다.

• Anatomy and Cell Biology
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• 제56권4호
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• pp.482-493
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• 2023

Understanding the anatomy of suprascapular area helps the clinicians and surgeons in management of any disability at the shoulder region. This work aimed to clear the different morphological and morphometrical types of suprascapular notch (SSN). Unknown 120 dry human scapulae of both sides and 60 formalin-embalmed cadaveric upper limbs (40 males and 20 females) were used in the present study. Three main morphological forms of SSN were reported: J, U, and V-shaped. J-shaped notch showed the highest incidence followed by U-shaped then V-shaped one. Morphometrically, type (III) notch was the most prevalent in both dry bones and cadavers, while the incidence of type (II) was the lowest form. Also, the measurements of superior transverse diameter, middle transverse diameter and vertical dimension of the different types of the notch showed no side or sex significant difference. The suprascapular foramen with ossified superior transverse scapular ligament (STSL) was seen in 5.8% of dry bones and 10% of cadaveric specimens. Fan and band-shaped ossified transverse scapular ligaments were reported. Absence of SSN was seen in 10.8% of dry bones, 7.5% of male and 10% of female specimens with left side predominance. V-shaped, absence, and ossified STSL were considered as predisposing factors of suprascapular nerve entrapment syndrome. Knowledge of the morphology and morphometric parameters of SSN is of great clinical significance for anatomists, radiologists, physiotherapists, orthopedics and neurosurgeons to perform good diagnosis and best planning for surgical or arthroscopic interventions within the shoulder region.

• 복식
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• 제60권1호
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• pp.101-116
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• 2010

In this study, the subjects are the expression methods and compositions of peony patterns in Chinese textiles. This study represents the peony patterns which are from Tang Dynasty to the Qing Dynasty, the research subjects are the peony patterns in fabric, except the peony patterns which are expressed by gold foil, embroidery and kesi. The objects of this study are 72 pieces of peony patterns. We sketched the configuration details of peony patterns through the Illustrator program. Analyze and classify the configuration accurately. Based on the 72 pieces of peony patterns, expression methods and compositions of the peony pattern are as following, firstly, we classified peony patterns into three categories, based on expression methods, as realistic shape, pattern shape and shape. Among these 72 fabric relics, there most of realistic shape 42 pieces(58.3%), pattern shape 25 pieces(34.7%), and shape 5 pieces(7.0%). Secondly, in the realistic shape peony, the most of pattern has petal accumulate as grape- shaped. This type is found in almost every Dynasty and was used regularly in the eras of Song and Ming Dynasty. In the era of Ming Dynasty, by using petals like the curly mushroom, Yeongji(靈芝), the pattern of symbolizing longevity was habitually used. The U-shaped flower pattern (type E) and the pattern of emphasizing the veins of petals are found only in the remains of the era of Qing Dynasty. Thirdly, in the pattern shaped peony, the most of pattern has some petals which are separated(type C). Fourthly, we classified peony patterns into four categories, based on compositions, as individual branch form, floral branch form, cluster branch form and floral nest form. Among these 72 fabric relics, there most of individual branch form 33 pieces(45.8%), floral branch form 18 pieces(25.0%), cluster branch form 13 pieces(18.1%), floral nest form 8 pieces(11.1%).

• 아태비즈니스연구
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• 제14권4호
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• pp.233-254
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• 2023

Purpose - This study aims to verify whether the effect of tax avoidance on corporate value is non-linear in the Korean financial markets. Design/methodology/approach - This study believes that the cause of the inconsistent empirical analysis results of previous studies that verified the relationship between tax avoidance and firm value may be an error in assuming linearity, and verifies whether a nonlinear relationship exists. The sample company in this study is a December settlement corporation listed on the Korean stock market, and the analysis period is from 2000 to 2021. In the empirical analysis model, Tobin's Q is used as a proxy for corporate value, tax avoidance is used as the main independent variable, and a regression model is designed with corporate size, growth rate, and debt ratio set as control variables. Findings - As a result of the empirical analysis, it can be confirmed that there is an inverted U-shaped nonlinear relationship between tax avoidance and corporate value. In the additional analysis using Ohlson (1995) firm valuation model for the robustness of the results of the empirical analysis, the same nonlinear value relationship between tax avoidance can be confirmed. Research implications or Originality - This study is considered to be meaningful in that it verifies the non-linear relationship of tax avoidance, which has not been attempted in previous studies. The meaning of the inverted U-shaped nonlinear relationship presented in this study is that corporate tax avoidance acts as a factor that increases corporate value up to a certain level, but rather becomes a factor that decreases corporate value when it exceeds a critical point. These results are expected to provide new perspectives and perspectives on tax avoidance to companies belonging to the Korean capital market.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(I)
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• pp.35-38
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• 2005

Carbon fiber sheets are widely used for strengthening the deteriorated RC structures. However most studies on the strengthening method of RC structures with carbon fiber sheets are concerning static problems. The purpose of this experimental study is to present the basic data on fatigue behaviors of. RC beams strengthened with carbon fiber sheets. The experimental parameters of this study are ; 1) the existence of U-shaped carbon fiber sheets at the ends for anchoring, 2) the number of carbon fiber sheet layers in strengthening the RC beams, 3) the load levels of $60\%\~90\%$ of the static bending moment strength, which is obtained form the static tests. Experimental results are estimated from the relationships of load level, displacement, number of repeated load and released energy. It is concluded that U-shaped carbon fiber sheets for end anchoring is very effective and the beams strengthened with one layer of carbon fiber sheet have longer fatigue life than that with three layers.

• 대한전기학회논문지:시스템및제어부문D
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• 제54권3호
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• pp.180-185
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• 2005

Microstrip antennas generally have a lot of advantages that are thin profile, lightweight, low cost, and conformability to a shaped surface application with integrated circuitry. In addition to military applications, they have become attractive candidates in a variety of commercial applications such as mobile satellite communications, the direct broadcast system (DBS), global positioning system (GPS), and remote sensing. Recently, many of the researches have been achieved for improving the impedance bandwidth of microstrip antennas. The basic form of the microstrip antenna, consisting of a conducting patch printed on a grounded substrate, has an impedance bandwidth of $1\~2\%$. For improvement of narrow bandwidth of microstrip patch, we were designed U-slot microstrip patch antenna in this paper. This antenna had wide bandwidth for all personal communication services (PCS) and IMT-2000. For the design of U-slot microstrip patch antenna using a finite difference time domain(FDTD) method. This numerical method could get the frequency property of U-slot patch antenna and the electromagnetic fields of slots.

• 복식
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• 제37권
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• pp.47-69
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• 1998

The purpose of this study is to inquire the hair, head-dress and clothing(upper clothing: Veil, Samkaksika, Sash) of Bodhisattvas in Dunhuang Mogaoku of the period from Northern Liang Dynasty(421∼439) to Tang Dynasty(618∼907). The method of this figure and the change of clothing form : 'Dunhuang Mogaoku'1st Volume-4th Volume. The Bodhisattvas' hair style are somehat various ; A part in her hair, Suibal, Gae, Sakbal. A part in Bodhisattvas's hair is observed from Northern Liang Dynasty to Sui Dynasty. But Suibal had been continuous succeeded. Meanwhile, in the periods of Sui and Tand Dynasty, there were the hair styles whose ends were curled up. It is called Eulle Meor-ee. Especially, in Tang Dynasty various styles of Gae were appeared. Doogun was observed from Northern Wei to Tang Dynasty. There were three kinds of head-dress; Samsikkwan(having 3 decoration), Bokwan and Jungmeunkwan(appeared in Tang Dynasty). Meanwhile, Sash let was become more and more decorative. The Upper clothing can be classify into Veil, Samkaksika, Sash, etc. Veil were observed in every period but X shaped one was form Northern Wei and U shaped one was from Northern Zhou Dynasty. After the period of Sui Dynasty U shaped Veil become prevalent. Samkaksika was observed for the first time in Northern Zhou Dynasty. Cutted sam-kaksika was appeared in Sui Dynasty and succeeded to Tang Dynasty. Poncho tyed Samkaksika was also observed in Tang Dynasty. In Westhern Wei Dynasty. daesupo was used into outter garment, which us that chinese influence was deep tell. Sash showed up in Tang Dynasty and it is used for Veil for the whole period of the Dynasty. But using sash for veil was formally hanged on going the lated period of Tang Dynasty. We can observe the sun-moon decoration and the wings of a bird decoration at the Bokwan, Veil, Samkaksika and Sash, etc. It is was the influendce of Sasan Per-sia and India. I will fill up the insufficency of this study wity continous research of ornament(Muktahara) and skirt of Bodhisattva and deeper inquiry of the relationship around the many countries.

• 대한방사선기술학회지:방사선기술과학
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• 제3권1호
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• pp.107-113
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• 1980

The concentration of total protein during the metamorphosis of the Indian meal moth, Plodia interpunctella $H\ddot{u}bner$ was measured using micro-Kjeldahl method by Oser(1965). Healthy specimens were chosen as samples at each developmental stages: the 1st instar larva, the 3rd inster larva, final instar larva, pupae 2, 6, 10 days and the adult 1 day. The total protein concentration decreased gradually until the two day pupal stage and increased at the six day pupal stage. In the one day dault stage, the concentration reached a maximum. In conclusion, changes of total protein concentation through the course of the physiological cycle form a U-shaped curve when graphed against the histolysis of larval organs and the histogenesis of adult organs. In view of controlling pest, the U-shaped pattern of physiological activity indicates that control will be the most effective at the time of the most physiological weakness manifested at the two day pupal stage.