[작성자:] eeesch

A New Ultra-Wideband Balun and its Associated Components

-. 연 사 : 김강욱 교수 (경북대학교)

-. 일 시 : 2008년 12월 12일 (금) 오후 2:45 ~ 4:15

-. 장 소 : LG동 105호

-. 초청자 : 박 위 상 교수 (T.2224)

Abstract

A recently developed ultra-wideband (UWB) balun opens new possibilities for the low-cost, mass-producible, and surface mountable UWB components with 10’s of GHz bandwidth. The balun is a simple microstrip-to-coplanar stripline transition structure, but a single balun can be designed to have operating frequency range from DC to over 40 GHz. The balun design is based on optimal impedance matching and smooth field transformations between adjacent transmission lines. Utilizing this uniplanar balun, new low-cost and mass-producible components—e.g., mixers, doublers, antennas, detectors, differential amplifiers, etc.—with 10’s of GHz bandwidth are being developed. The new UWB components can also be designed in the form of low-cost surface-mountable chips, which may open new commercial UWB application areas.
In this presentation, the design of the ultra-wideband balun will be described, and recent developments of new UWB components utilizing the balun will also be introduced

◈ Title: A. Einstein left us two unresolved issues
◈ Speaker : Prof.  Kwon, O’Dae (POSTECH)
◈ Date & Time : Friday, April 22, 2011 (14:00pm ~ 15:30pm)
◈ Place : LG Research Building, Room #101
◈ Abstract : 
• In 1919 when Einstein addressed “Religion of fear>Moral God>Cosmic God”, nobody was openly against.
• In 1926 he said, “QM is certainly imposing. But an inner voice tells me that it is not yet the real thing… He is not playing at dice[cf. Unification issue]”, many scientists    were against. That is the first issue and NOW some are working on it.
• In 1930 when Einstein RE-addressed “Religion of fear>Moral God>Cosmic God”, many Christians in USA were openly against.
• In 1939 he said, “Science without religion is lame, religion without science is blind.” Also said, “Science not only purifies the religious impulse of the dross of its anthropomorphism but also contributes to a religious spiritualization of our understanding of life.” This is the second issue emerging in 21st C. • “It is clear to me that [this] religious paradise of youth was a first attempt to liberate myself from the “only personal”: This urge stayed with him all his life.

◈ Title : 3D Sound Research at Virtual Audio Systems Laboratory (NRL 2005~2010)
◈ Speaker : Prof. Youngjin Park (KAIST)
◈ Date & Time : Friday, April 15, 2011 (14:00pm ~ 15:30pm)
◈ Place : LG Research Building, Room #101
◈ Host : Prof.  Sangchul Won (Tel. 2221)
◈ Abstract : Human mainly depends on the visual and auditory cues to capture spatial information about the environment. Frequently, auditory cues are often given minimal attention in designing the virtual environment. However, auditory cues play an important role in production of the virtual environment because spatial information provided by vision only is limited only to the viewing direction. The ability to identify the location of a sound source is called auditory localization and technologies that replicate the sounds from a real environment through an artificially created environment based on human’s auditory localization are known as 3D sound technology. Virtual Audio Systems Laboratory (VASL) at KAIST has been studying 3D sound technology and its applications. In this seminar, we overview the research activities of VASL related to 3D sound technology. There are two main topics in this seminar. The one is the high-fidelity Virtual Auditory Display (VAD) system which generates spatial virtual sounds in 3D space and conveys them to a listener without measurement of the individual Head-Related Transfer Functions (HRTFs). The second one is the robot auditory system in which sound source localization   is possible to achieve the effective human-robot interaction. The developed high-fidelity VAD system can be easily applied to many practical application fields including games, home theatre, virtual reality, and military simulator, etc. The developed robot auditory system, which includes artificial ear, MEMS sensor, SoC for sound localization and speaker/speech recognition, can be used for intelligent robots to process speech/acoustic signals. On going research topics in the laboratory including an idea of auditory system for hologram are introduced as well. 

◈ Title: How to win a Nobel Prize
◈ Speaker : Dr. Kee Sup Kim (Samsung Electronics)
◈ Date & Time : Friday, April 15, 2011 (15:45pm ~ 17:00pm)
◈ Place : LG Research Building, Room #101
◈ Host : Prof.  Young Hwan Kim (Tel. 2227)
◈ Abstract : To succeed as an engineer, some business acumen other than     pure technical skills are essential.  The speaker will use the award winning projects (in this case Intel Achievement Award, which Intel CEO Paul Otellini called the Nobel prize at Intel) to illustrate how    normal projects get turned into an award winning projects and the behind the scenes work needed for actual nomination for the award.

◈ Title : Nano scale NAND flash memory, 3 bit per cell, 3D NAND structure
◈ Speaker : Principal engineer. Myoung Kwan, Cho (Hynix)
◈ Date & Time : Friday, April 8, 2011 (14:00pm ~ 15:30pm)
◈ Place : LG Research Building, Room #101
◈ Host : Prof.  Jeong-Soo, Lee  (Tel. 2380)
◈ Abstract : Recent NAND flash memory technology is presented, especially in terms of 3 bit per cell and 3D NAND structure. In the 2xnm era,  NAND cell scaling down have faced process complexity and narrow cell operation window. In this presentation, the operation algorithm in 3 bit per cell and the characteristics of 3D NAND cell is discussed.

캠브리지대학의 제도와 운영

-.연 사 : 장수영 교수 (포항공대 전자과)

-. 일 시 : 2008년 12월 5일 (금) 오후 2:45 ~ 4:15

-. 장 소 : LG동 105호

Abstract

2009년에 창립 800주년을 맞는 캠브리지대학의 제도와 운영에 대하여 살펴본다. 캠브리지대학은 3년제이며, 학사과정은 11,021명, 대학원생 7,685명 등 18,706명의 학생을 가진 대학이며 연간 학사 3,346명, 석사 3,180명, 박사 981명을 배출한다.
31개의 College로 구성되어 있으나 College는 우리나라의 단과대학개념이 아니고 교육기능이 있는 기숙사를 뜻한다. 캠브리지대학은 지금까지 81명의 노벨수상자를 배출하면서 세계 최우수대학 중의 하나가 되었다.
연간 대학교 예산은 5억 2500만 파운드, College예산은 2억7000만 파운드로서 원화로는 1조6천억원에 해당된다.