• 복식
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• 제57권10호
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• pp.156-168
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• 2007

Brands started to manufacture consumer-oriented products and look for active methods to appeal their brands to consumers, in the 1990s. As a result, actively adopting graphic design to clothing designs has recently become an important strategy among others. Graphic design has important significance in contemporary fashion design in the aspect that it has expanded the range of expressive methods by bringing over expressive methods of visual design, and has led to an increase in sales due to consumer satisfaction, but it has been vaguely handled together with textiles design, and research on the topic has been insufficient. Therefore this study aimed to clearly define the idea of graphic design based on documentary research, and analyze applying case and formative features of graphic design expressed in clothing, through case studies from 2004 to 2006, and derive the trends of graphic design expressed in contemporary fashion design. The results of this study are as follows. The common characteristics of images that reflect recent graphic design trends in fashion design are hand writing and irregular composition, and images that actively pursued these pointes were retro and craft images, and modern and sporty images reflected these graphic design trends in a comparatively passive manner. It is important to maintain style differentiation rather than indiscreetly adopting graphic design trends to clothing, and to appropriately apply trend characteristics of fashion design and other design areas. Expressive methods of design are expected to expand through appropriate application and development of graphic design, and can potentially provide a new solution to brand differentiation.

• Structural Engineering and Mechanics
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• 제72권6호
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• pp.747-762
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• 2019

Based on the ball-screw mechanism, a tuned viscous mass damper (TVMD) has been proposed, which has functions of amplifying physical mass of the system and frequency tuning. Considering the sensitivity of a single TVMD's effectiveness to frequency mistuning like that of the conventional tuned mass damper (TMD) and according to the concept of the conventional multiple tuned mass damper (MTMD), in the present paper, multiple tuned mass viscous dampers (MTVMD) consisting of many tuned mass dampers (TVMD) with a uniform distribution of natural frequencies are considered for attenuating undesirable vibration of a structure. The MTVMD is manufactured by keeping the stiffness and damping constant and varying the mass associated with the lead of the ball-screw type inerter element in the damper. The structure is represented by its mode-generalized system in a specific vibration mode controlled using the mode reduced-order method. Modal properties and fundamental characteristics of the MTVMD-structure system are investigated analytically with the parameters, i.e., the frequency band, the average damping ratio, the tuning frequency ratio, the total number of TVMD and the total mass ratio. It is found that there exists an optimum set of the parameters that makes the frequency response curve of the structure flattened with smaller amplitudes in a wider input frequency range. The effectiveness and robustness of the MTVMD are also discussed in comparison with those of the usual single TVMD (STVMD) and the results shows that the MTVMD is more effective and robust with the same level of total mass.

• 한국음향학회지
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• 제37권1호
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• pp.39-45
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• 2018

압축센싱을 적용하면 전체 신호의 차원 대비 실제 사용하는 신호의 차원이 작은 희소신호의 경우, 적은 수의 관측치를 통하여 빠른 시간 내에 복원이 가능하다. 수중 표적의 기어박스 및 보조 장치 등으로부터 방사되는 신호의 토널 주파수 성분들은 처리하고자 하는 주파수 대역에서 상대적으로 주파수 성분이 적다. 따라서 토널 신호는 주파수 영역 전체 대비 희소신호로 모델링 될 수 있으므로 희소 신호 복원 알고리듬인 S-OMP(Simultaneous-Orthogonal Matching Pursuit)를 이용하여 복원할 수 있다. 본 논문에서는 압축센싱 기법을 이용하여 수중 표적의 방사 소음 신호의 토널 주파수를 검출하는 기법을 제안하고 모의 실험을 통해 성능을 확인한다. 모의실험에서 기존의 FFT(Fast Fourier Transform) 임계치 기법을 이용한 방법에 비해 낮은 SNR(Signal to Noise Ratio)에서도 정확한 토널 성분을 추정 할 수 있음을 확인하였다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.349-351
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• 2013

본 논문에서는 강판 결함 검출 시스템의 아날로그 신호처리를 하기 위해 저전력 이득 조절 증폭기(PGA)를 설계하였다. 설계된 PGA는 홀 센서에서 나오는 신호를 검출 하려는 결함의 종류에 따라 그 이득을 6dB에서 60dB까지 7가지 단계로 조절 가능하다. PGA이득은 선형성 및 칩 크기를 고려하여 스위치의 온-저항과 수동소자 크기에 의해서 조절 되도록 설계하였다. 이득오차는 0.2dB 보다 작으며 소비전력은 0.47mW이다. 전원전압 1.8V에 $0.18{\mu}m$ CMOS 공정을 이용하여 PGA를 설계하였다.

• Biotechnology and Bioprocess Engineering:BBE
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• 제11권2호
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• pp.146-153
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• 2006

A passive microfluidic delivery system using hydrophobic valving and pneumatic control was devised for microfluidic handling on a chip. The microfluidic metering, cutting, transport, and merging of two liquids on the chip were correctly performed. The error range of the accuracy of microfluid metering was below 4% on a 20 nL scale, which showed that microfluid was easily manipulated with the desired volume on a chip. For a study of the feasibility of biochemical reactions on the chip, a single enzymatic reaction, such as ${\beta}-galactosidase$ reaction, was performed. The detection limit of the substrate, i.e. fluorescein $di-{\beta}-galactopyranoside$ (FDG) of the ${\beta}-galactosidase$ (6.7 fM), was about 76 pM. Additionally, multiple biochemical reactions such as in vitro protein synthesis of enhanced green fluorescence protein (EGFP) were successfully demonstrated at the nanoliter scale, which suggests that our microfluidic chip can be applied not only to miniaturization of various biochemical reactions, but also to development of the microfluidic biochemical reaction system requiring a precise nano-scale control.

• 한국수산과학회지
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• 제50권4호
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• pp.406-412
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• 2017

Vocalizations of the common dolphin Delphinus Delphis, were recorded from a single hydrophone while coastal visual survey was performed in the East Sea in March 2017. Like most Delphinidae, common dolphins produce whistles, echolocation clicks, and burst-pulsed calls, with repertoires that differ between species and geographically separated populations. This study focuses on using frequency analysis to classify sounds into three categories and to compare them with those of other common dolphin populations. The fundamental frequencies of the whistles were high in the 6 to 14 kHz range, while echolocation clicks were in the 40 to 90 kHz frequency band. These results are similar to high-energy distributions in the same frequency band in other regions. Based on this study of the acoustic characteristics of dolphins off the east coast of Korea, cetacean vocalizations can be classified using a database of cetacean sounds in Korea. In addition, this technique could improve data quality for visual whale surveys and could be applied to various other research subjects.

• Journal of Astronomy and Space Sciences
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• 제13권2호
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• pp.105-116
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• 1996

이 연구는 1992년 8월 11일과 1993년 9월 26일 발사된 우리별 1호 및 우리별 2호의 열제어 모델 및 그 동안의 운용 결과에 대한 해석을 바탕으로 한 것이다. 우리별 1, 2호는 아리안 발사체의 초소형 위성 탑재를 위한 특수 구조물에 장착되어 발사되었기 때문에 크기, 전력, 무게 등의 제한으로 인해 외부로부터의 열 흡수와 방출의 제어 및 내부의 연결 모듈간의 열 흐름을 제어하여 위성체 전반의 열적 환경을 조절하는 수동적인 방식의 열제어를 채택하게 되었다. 우리별 위성의 주 임무는 위성 기술의 개발과 더불어 위성체 바닥면에 탑재된 CCD 카메라를 이용하여 지구 표면을 촬영하는 것이었기 때문에 위성의 바닥면은 항상 지구의 중심을 향하고 있게 된다. 이 연구는 위성의 임무 궤도에 대한 분석으로부터 열 모델링, 시뮬레이션 결과 및 우리별 2호의 실제 운용헤서 얻어진 원격검침 정보를 바탕으로 한 열 모델의 평가를 포함한다. 이 분석 결과를 바탕으로 수동 제어에 의한 우리별 위성의 열 모델 및 해석이 실제 측정된 온도 데이터와 평균 오차 $$10^{\circ}C$ 이내에서 일치되었음을 보여 준다.

• Clinics in Shoulder and Elbow
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• 제1권2호
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• pp.242-249
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• 1998

Stiffness of the elbow joint is relatively common after trauma, ectopic ossification, bum, postoperative scar, and etc. Mild flexion deformity can be reduced by use of active or passive motion exercise, dynamic sling, hinged distractor device, or turnbuckle orthosis. But these methods have disadvantages of difficulty in gaining acceptable range of motion only with stretching exercise, re-contracture after conservative managements and poor results that flexion contracture remained. The common described operative exposures for treatment of the stiff elbow are anterior, lateral, posterior, and medial approach. Through Anterior, lateral and medial approach each has not access to all compartments of the elbow. But, posterior approach has benefits that access to posterior, medial and lateral aspects of the elbow and as needed, fenestration to the olecranon fossa that produces a communication between the anterior and posterior compartments of the elbow are possible. From June 1991 through April 1997, 11 patients who had posttraumatic stiff elbow, were treated with debridement arthroplasty through the posterior approach. The purpose of this study are to introduce technique of the debridement arthroplasty and to evaluate final outcomes. With regarding to preoperative pain degree, mild degree matches to 3 cases, moderate to 3 cases, and severe to 2 cases. In preoperative motion, flexion was average 85° and extension was 30°. Postoperatively nine patients had got the complete relief of pain and two patients continued to have mild pain intermittentely. Postoperative flexion improved to 127° and extension to 2°, so that elbow flexion had improved by an average of 42° and elbow extension by 28°. On the objective scale all patients had good or excellent results and they all felt that they were improved by operation. Debridement arthroplasty is one of excellent procedures for the intractable stiff elbow if it is not unstable or it has not incongrous. But it need a meticulous operative technique and a well-programmed rehabilitation.

• Clinics in Shoulder and Elbow
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• 제1권2호
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• pp.167-174
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• 1998

Since the first description by Cotton, there have been sporadic reports about the inferior subluxation of the shoulder. Nevertheless there is still a lack of consensus regarding the mechanism of occurrence, evolution and treatment. We have experienced six cases of inferior sublusation(five cases after trauma and one case after surgery) which resolved over time. Analysis of the clinical informations including serial radiographs, data from clinical examination and electromyography(EMG) revealed the following results. All the five post-traumatic inferior subluxations were noted in women with an average age of 59 years after direct trauma resulting in fracture of the proxiaml hrnerus(4) or clavicle(1), of which nerve injury was proven by EMG in three. One case occurred after Bankart repair by stretch injury to the axillary nerve. The presenting symptom was unusually severe pain on passive motion. Absence of anterior or posterior displacement wasl confirmed by radiographs. All the cases seemed to have delayed onset of subluxation except one. The subluxed hu.meral head was concentrically reduced at an average 11 weeks(range 3-23 weeks) from the supposed time of occurrence and the acromiohumeral interval measUred on the standing anteroposterior radiographs decreased to 9.4 mm ftom 23 mm. Improvement of pain paralled the reduction. In conclusion, the most common cause of transient inferior subluxation was nerve injury in ou~ series and the prognosis was excellent, however protraction of recovery or leaving permanent subluxation would be possible if .the injured nerve is unrecoverable.

• 대한한방내과학회지
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• 제20권1호
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• pp.244-260
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• 1999

This study was to investigate diagnosis of shoulder pain on cerebrovascular attack patients and treatment effects by using physical treatment and orienatal diagnosis aparatus, as oriental diagnosis equipments, these were used thermography, maegzin and yangdorag machine. as physical treatment equipments, these were used Hot pack, TENS (Transcutaneous electrical nerve stimulation), ICT(Interferential current therapy) the results were followed 1. In Sex and Age distribution on cerebrovascular attack patients with shoulder pain, male(51.7%)had many than female(48.3%) and 60s were the top, next 70s 50s 40s. 2. In the reason of cerebrovascular attack and the type of motor paresis, cerebrovascular infarction(73.3%) had many than hemorrhage(26.7%) 3. In hospitalizied period of cerebrovascular attack patients with shoulder pain, the period from 11 to 60 days had almost occupied. 4. Oriental medical diagnositic propriety of shoulder pain by using maegzin and yangdorag machine were not recognized. 5. In measuring passive range of motion of pre and post treatment, improvement effect on Hot pack was not showed, but effects on TENS, ICT were showed. 6. In measuring temperature of painful shouler joint of pre and post treatment by using thermography, the effect of Hot pack was not recognized but the effects of TENS, ICT were recognized.