• Proceedings of the Korean Magnestics Society Conference
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• 2002.12a
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• pp.200-201
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• 2002

Recently, a countermeasure for the electromagnetic noise emission on RF integrated transmission line using the loss generation of ferromagnetic thin films is briefly suggested$\^$1,2/. Without the magnetic film, the noise harmonics of the signal pass through the transmission line with only a little attenuation. The ideal role of magnetic film is not to raise insertion losses in the pass-band and to give as large attenuation as possible to eliminate the noise harmonics at the stop-band, the frequency range higher than the meaningful signal as shown in Fig. 1. and Fig. 2. (omitted)

• Mycobiology
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• v.44 no.4
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• pp.248-259
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• 2016

During fungal diversity surveys of the order Eurotiales in Korea, two fungal strains, EML-DG33-1 and EML-NCP50, were isolated from samples of rat dung and fig tree leaf collected at a garden located in Gwangju in 2014. To complete the National Species List of Korea, it is a prerequisite to verify whether many questionable species, which were previously recorded but not confirmed, indeed present in Korea. Herein, the isolates were confirmed as undescribed species, Paecilomyces variotii and Talaromyces amestolkiae based on the combination of morphological and phylogenetic analyses of multigenes including the rDNA internal transcribed spacer, ${\beta}-tubulin$, and RNA polymerase II subunit 2.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.08a
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• pp.306-306
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• 2013

p-type Si(100)기판위에 Al2O3 박막을 증착하고 Si/SiO2 박막을 연속 증착하여 태양전지를 제작하였다. Si/SiO2 박막을 연속으로 증착하면 양자 구속이 일어나고 이로 인한 유효밴드 갭이 증가하게 되고, tunnel effect와 계면에서의 passivation 효과를 기대할 수 있다. 이런 효과들을 이용하여 고효율 태양전지를 기대 할 수 있다. 본 연구에서는 Remote Plasma Atomic Layer Deposition(RPALD)를 이용하여 Al2O3를 증착하였고 RF-Magnetron Sputter와 e-beam Evaporator 장비를 이용하여 Si/SiO2을 증착하였다. 전극으로는 Ti/Ag와 Al을 이용하였다. Solar simulator 장비를 이용하여 cell의 전기적 특성 평가를 평가하였고(Fig. 1) QE 측정장비를 통해 파장대의 따른 광학적 측정을 하였다(Fig. 2). ellipsometer 장비와 ${\alpha}$-step 장비로 박막과 전극의 두께를 측정하였고 4-point prove 장비를 이용하여 면저항, 저항율을 측정 평가하였다. 또한 I-V, C-V 측정 결과 터널링 현상이 일어나는 것을 확인 하였으며, Si/SiO2 다중 박막을 연속 증착 할수록 cell 효율이 더 좋게 나온다는 것을 확인하였다.

• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.56-56
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• 2020

하도식생은 흐름과 유사의 이송에 영향을 주고, 하도의 지형변화를 일으키는데 중요한 역할을 하다. 하도 식생의 밀도가 증가하면, 하안의 안정성이 증가하고 하안침식이 감소하며, 사주의 형상과 거동에 영향을 준다. 또한 하천의 사행발달 및 하천의 지형변화에 영향을 준다. 식생의 성장과 밀도는 홍수 및 하상변동에 의하여 영향을 받으며, 이는 흐름 및 하천의 지형에 영향을 준다. 따라서 본 연구에서는 하도식생에 의한 사행하천의 발달과정을 2차원 수치모형을 적용하여 분석하였다. 하도식생의 생의 성장과 소멸과정을 고려하여 식생밀도를 고려하여 사행하천의 변화 과정을 분석하였다. 초기에 하안침식이 발생하고, 하폭이 증가하였다. 특히, 흐름이 집중되는 만곡부에서 하안침식이 증가하며, 하도의 사행도가 증가하였다(Fig.1(b)). 시간이 증가하면서 만곡부 내측에서 고정사주 내측에서 scroll bar가 발달하며, 만곡부 외측에서는 하안침식이 발생하고, 사행도가 증가하였다. 또한 식생의 침수시간이 감소하고 식생의 성장률은 증가하였다(Fig.1(c)). 식생의 밀도가 증가함에 따라 사행도는 증가하였다. 식생의 밀도가 증가함에 따라,

• Ceramist
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• v.7 no.3
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• pp.5-9
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• 2004

사회가 정보화 되어갈수록 정보의 교류는 매우 중요해진다. 이런 정보의 교류는 사람과 사람과의 정보만이 아니라 사람과 기기와의 정보교류도 늘어나고 있으며, 또한 유선보다는 무선에 의한 정보교류가 늘어나고 있다. Fig. 1과 같이 휴대전화와 가정의 전화, 사무실의 전화와 연결하여 각종 기기를 원격으로 동작시킬 수 있고 상태를 보고 받을 수도 있다. (중략)

• Proceedings of the Korean Vacuum Society Conference
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• 2016.02a
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• pp.224-224
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• 2016

Many researchers have been tried to improve the performance of the phosphorescent organic light-emitting diode(PHOLED) by controlling of the dopant profile in the emission layer. In this work, as shown in Fig. 1 insert, a typical red PHOLED device which has the structure of ITO/NPB(50nm)/CBP(30nm)/TPBi(10nm)/Alq3(20nm)/LiF(0.8nm)/Al(100nm) is fabricated with a 5nm thick doping section in the emission layer. The doping section is formed by co-deposition of CBP and Ir(btp)2acac with a doping concentration of 8%, and it's location(x) is changed from HTL/EML interface to EML/HBL in 5nm steps. The current efficiency versus current density of the devices are shown in Fig. 1. By changing the location of doping section, as shown in Fig. 1 and 2, at x=5nm, the efficiency shows the maximum of 3.1 cd/A at 0.5 mA/cm2 and it is slightly decreased when the section is closed to HTL and slightly increased when the section is closed to HBL. If the doping section is closed to HTL(NPB) the excitons can be quenched easily to NPB's triplet state energy level(2.5eV) which is relatively lower than that of CBP(2.6eV). Because there is a hole accumulation at EML/HBL interface the efficiency can be increased slightly when the section is closed to HBL. Even the thickness of the doping section is only 5nm,. the maximum efficiency of 3.1 cd/A with x=5 is closed to that of the homogeneously doped device, 3.3 cd/A, because the diffusion length of the excitons is relatively long. As a result, we confirm that the current efficiency of the PHOLED can be improved by the doping profile optimization such as partially, not homogeneously, doped EML structure.

• The korean journal of orthodontics
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• v.6 no.1
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• pp.17-24
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• 1976

The primary objective of this study was to define the differences that exist. between different sexes on the dentoskeletal framework and the soft tissue profile around the mouth. For the purpose of this study, cephalometric radiographs were obtained from the centric occlusion with closed lip position, through the research on each 42 males and females aged from 17 to 22 years with normal occlusion and acceptable facial appearence. The results were as follows: 1. Maxillary to mandibular relationships. Among the angles formed by the long axis of the maxillary and mandibular anterior teeth, the maxillary and mandibular anterior alveolar bone, and the lower and upper lips (Fig.2), only the angle formed by the lips was more acute in males than in females. The males have a more rounded profile, and the females have a flatter profile in the lower third of the face. The differences is statistically significant for the angle formed by the lips. The fact that the lips have a difference greater than that of teeth or the alveolar bone indicates that the lip position is not entirely due to tooth and bony support. Possibly the thickness of the lips has an influence. 2. Occlusal plane. The occlusal plane was related to the anterior tooth inclination, anterior alveolar bone profile, and the lip contour, both maxillary and mandibular (Fig.3). Only the angle related to lower lip was statistically significant. The females again had the more obtuse angle, indicating a flatter profile than that of the males. 3.Skeletal planes. The angles formed by the anterior maxillary lips, teeth, and alveolar bone with the Frankfort plane and the angles of the mandibular lips, teeth, and, alveolar bone and the mandibular plane were investigated (Fig.4). Results were similar to those from maxillary to mandibular relationships. The results were statistically significant for the upper lip and the lower lip, only. 4. Esthetics. The facial line and the mandibular plane were compared with the esthetic line. These angles were different for the different sexes, but only the latter was statistically significant. This difference may be due to the profile contour of the nose.

• Magazine of the Korean Society of Agricultural Engineers
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• v.18 no.1
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• pp.4079-4086
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• 1976

In many reservoir projects, economic considerations will necessitate a design utilizing surcharge. Determination of the most economical combination of surcharge and spillway capacity for a given spillway crest level will require flood routing studies and economic studies of the dam-reservoir-spillway combinations. Many methods of actual flood routing have been devised, each of them with its advantages and disadvantages. Some of these methods are listed below: (1) Arithmetical trial-and-error method. (2) Modified Puls' method (3) Cheng's graphical method (4) Horton's arithmetical method (5) Ekadahl's arithmetical method (6) Digital computer programming. For the purpose of preliminary design and cost estimating of dams and spillways, it is often required to estimate, for a given design flood and spillway crest level. the approximate values of two among the three characteristics of the spillway spillway length, maximum discharge and surcharge depth at maximum discharge, when one of these quantities is given. As is well known, the outflow hydrograph for an ungated overflow spillway assumes the form of a wave-shaped curve with a minimum point for Q=o At zero time and a maximum point for Q=Qmax at its intersection with the falling leg of the inflow hydrograph (see Fig. 4) The shaded area between the inflow and outflow hydrographs represents at the approximate scale the temporary retention Vt. In line with the remarks, draw by free hand the assumed outflow hydrograph with its maximum point for the given Qmax (see Fig. 4) and by planimetration find Vt. From the reservoir capacity curve (Fig. 3) find Vs for the given spillway crest level and make V=Vs+Vt. From the above curve find surcharge water elevation for V and surcharge depth Hmax over spillway crest. From the discharge formula compute {{{{L= { Q} over { { CH}^{3/2 } } }}}} The methed provides a means for a quick and fairly accurate estimation of spillway capacity.