최우영 교수

Abstract In recent years, demand for three‐dimensional simulations has continued to grow in the field of computer‐aided engineering. Especially, in the analysis of forming processes a fully automatic and robust mesh generator is necessary for handling complex geometries used in industry. For three‐dimensional analyses, tetrahedral elements are commonly used due to the advantage in dealing with such geometries. In this study, the advancing front technique has been implemented and modified using a

최근 사회자본에 대한 높은 관심에도 불구하고 사회자본 연구의 시야는 대부분 현대에 한정되어 있는 것이 사실이다. 이는 사회자본의 정체(identity)와 형성이 역사ㆍ문화적 맥락에 의존해 있음을 고려할 때 아쉬운 대목이 아닐 수 없다. 여기에서 사회자본에 대한 역사적 연구의 필요성을 확인할 수 있다. 이 글은 상기의 문제의식에 따라 전통사회인 조선에서 존재했던 주요 농민조직을 ‘사회자본’의 관점에서 고찰한다. 먼저 ‘향도’조직은 자연촌을 단위로 한 자연발생적, 일상적 농민조직으로서 농민의 삶 전반에 종합적으로 관여한 공동체적 연결망이었다. 사회자본의 관점에서 볼 때 향도는 교량적 측면보다는 결속적 측면이, 제도적 측면보다는 관계적 측면이, 구조적 측면보다는 인지적 측면이 뚜렷이 부각되는 사회자본이었다. 두 번째 ‘두레’조직은 마찬가지로 자연촌을 단위로 하였지만, 수전노동이라는 특화된 목적과 거기에 걸맞는 청장년 남자들로 구성된 다분히 의도된 노동연결망이었다. 따라서 두레는 기본적인

한류는 우리시대 문화 지형을 반영하는 특징적 키워드 중의 하나가 되었다. 한류가 등장하기 이전까지 한국사회의 대중문화는 미국으로 대표되는 ‘문화권력국가’에 결정적으로 의존하고 있었고, 그런 만큼 문화지형의 식민성이 강했다. 오늘 한류가 주목받는 가장 큰 이유는 바로 이 문화적 식민성을 뒤집는 충격 때문이라고 할 수 있다. 한류의 존재, 그리고 한류의 이슈화 자체가 이처럼 통념화된 문화 지형의 균열을 반영한다. 한류의 이슈화 이면에는 문화수용에서 문화전파로의 지형 변화가 근원적으로 자리하고 있다. 이 글은 한류를 계기로 본 문화 지형의 변화가 한국사회 특유의 근대 해석, 6-80년대를 지배했던 공격적 근대 해석 및 근대 실천이 당시의 문화‘수용’과 밀접하게 이어져 있고, 한류가 부상한 90년대 후반 이래 새로운 대안적 근대 해석 및 실천이 현재의 문화‘전파’와 불가분 연결되어 있다고 이해하는 것이다. 결국 한류를 계기로 본 문화 지형의 변화는 한국사회의 근대 해석 및 실천과 함수관계로

The authors present a low‐power 850 nm Si optoelectronic integrated circuit (OEIC) receiver fabricated in standard 65 nm complementary metal–oxide semiconductor (CMOS) technology. They analyse power consumption of previously reported CMOS OEIC receivers and determine the authors receiver architecture for low‐power operation. Their OEIC receiver consists of a CMOS‐compatible avalanche photodetector and electronic circuits that include an inverter‐based transimpedance amplifier, a tunable equalise

Abstract In this paper, a locally refined tetrahedral mesh generation algorithm based on advancing front technique using optimization scheme with a non‐uniform trial height has been developed for three dimensional forming simulations to improve the quality of the local mesh system and computational efficiency. To generate locally refined surface elements, the refinement region was identified by checking the local effective strain rate and minimum interior angle of a surface element, respectively

In a digital hologram, the maximum viewing angle of a computer-generated hologram (CGH) is limited by pixel pitch due to the diffraction grating equation. Since reducing pixel size of display panel is challenging and costly, we propose a method to expand the viewing angle of a digital hologram by attaching an aligned pixelated random phase mask (PRPM) onto the CGH pattern based on analysis of simulation results. By introducing a phase-averaging process to the widely used iterative Fourier transf

This paper reviews 850nm Si photodetectors and integrated photoreceivers realized with standard Si process technologies including CMOS and BiCMOS. Such photodetectors and photoreceivers are of great interest as they can provide cost-effective optical interconnect receiver solutions. High-speed integrated photoreceivers can be achieved by spatially modulated light, lateral PIN, and P <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">+</sup> /N-well jun

We have investigated 60 GHz-band optoelectronic-mixers for realizing cost-effective fiber-fed 60 GHz wireless systems. Two types of optoelectronic-mixers are review: one based on cascaded semiconductor optical amplifier and electro-absorption modulator, and the other heterojunction bipolar transistors.

ATM switches require stringent reliability and availability even for access nodes. Carrier class ATM switches fulfill this requirement by employing expensive and sophisticated fault tolerant architectures. However, access switch systems are relatively cheap and compact. Most access switches support fundamental system reliability by providing redundancy for common parts of a system (e.g., switch fabric, power etc.). In addition to providing reliable connection to the core switch systems, access s

In this paper, an efficient GNSS (Global Navigation Satellite System) integration to NB-IoT chipset and its solution for constrained tracking scenario (i.e. time sharing between NB-IoT and GNSS) are explained. Considering the infrequent data transfer to network in the target application of NB-IoT, it makes sense to constrain tracking scenario in order to optimize system architecture in NB-IoT SoC (system on chip) for low-cost GNSS feature support. For efficient SoC design architecture, NB-IoT an

Conventional digital low dropout regulator (DLDO) operating speed is invariable due to constant external reference clock. Fixed DLDO operating speed, regardless of the load state, cause inefficient power consumption for steady-state load or stability problem due to slow transient response time. This paper introduces DLDO with reference-less adaptive clock generation which is optimized by load states. Coarse-fine control and burst-mode are added to the shift register adjusting power transistors (

BackgroundSoft tissue fillers have been used widely in recent years. As the use of fillerincreases, many complications have arisen. The complications should be prevented andif it occurs effective treatments are necessary to achieve a satisfying aesthetic result. Inthis article, we discuss the commonly used soft tissue filler and their complications. MethodsWe divided the soft tissue filler into three groups according to its origin. Thepossible complications and management according to the kind o