월요일(6월 25일)에는 교수 발표, 화요일(26일)에는 학생들 발표.
우리 연구실에서 5명은 참석해서 자리를 빛내 주길...

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The schedule of UT – SNU forum
“Electrical Engineering and Electronics for Quality Life and Society”
Date: June 25, 2007    Place: Building 39 B-103 Conference room

1.        Moderator  Prof. J.K. Park
9:00-9:10     Opening Remarks by President Komiyama (UT)
9:10-9:20     A Speech of Welcome by President Lee (SNU)

2.        Morning Session 09:20-11:45
09:20-09:30   Outline of COE in E.E.E, UT by Prof. K. Hotate(UT)

09:30-09:50   Innovation of Power Supply System by Distributed Generations by Prof. A. Yokoyama(UT)
09:50-10:10   Autonomous Microgrid Operation in Power System by Prof. S.I. Moon(SNU)
10:10-10:15   Discussion

10:15-10:35   New Life-style by Super Capacitor driven Mini-size Electric Vehicle by Prof. Y. Hori(UT)
10:35-10:55   Control of Rubber Tyred Gantry Crane with Super Capacitor by Prof. S.K. Sul(SNU)
10:55-11:00   Discussion

11:00-11:20    Dependable Computing by Prof. S. Sakai(UT)
11:20-11:40    Reliable Multimedia Communication on Wireless Networks by Prof. H. Shin(SNU)
11:40-11:45    Discussion

3.        Lunch 12:00-13:15

4.        Afternoon Session 13:30-16:20
13:30-13:50   A VLSI Brain System Mimicking the Processing in the Mind by Prof. T. Shibata(UT)
13:50-14:10   Fast perspective volume rendering using a GPU based acceleration technique
for Virtual Colonoscopy by Prof. Y.G. Shin(SNU)
14:10-14:15   Discussion

14:15-14:35   Photonic Sensing - Fiber optic nerve systems for materials and structures
that can feel pain by Prof. K. Hotate(UT)
14:35-14:55   Coded Optical Time Domain Reflectometry : Principle and Applications
by Prof. N. Park(SNU)
14:55-15:00   Discussion

15:00-15:15   Coffee Break

15:15-15:35   Advances in Quantum Dots for Nanophotonics and Quantum ICT by Prof. Y. Arakawa(UT)
15:35-15:55   Design and Analysis for Plasmonics by Prof. B. Lee(SNU)
    15:55-16:00   Discussion

    16:00-16:20   Discussions

5.  16:20-16:30   Closing Remarks by Professor Kim, Dean of College of Engineering

6.   Dinner Party   19:00-   (Plaza Hotel)


Abstracts of Presentations by UT Professors

1. Innovation of Power Supply System by Distributed Generations
by Prof. Akihiko Yokoyama(UT)

In recent years, new ideas of innovative electric power supply system have been discussed in the world, which will be able to supply electricity stably in cooperation with the conventional large-capacity power plants and small-capacity distributed generations (DG). Some prototype systems such as Micro-Grid are also being tested in the real field now at the first step toward the practical use in Japan. The background of promotion of DG installation into distribution network, the seed technology for the innovative power supply system with a large penetration of DG and the outlines of various kinds of the system are presented in this forum.

2. New Life-style by Super Capacitor driven Mini-size Electric Vehicle
by Prof. Yoichi Hori(UT)

We have shown novel motion control for Electric Vehicle (EV) by utilizing the electric motor's quick torque generation.  Recently, Hori Lab. developed new electric vehicles C-COMS I & II.  Super capacitors to drive these vehicles has great advantages: (1) Long life, (2) Large current charge/discharge, (3) Environment friendly material, (4) Remaining energy can be known from terminal voltage.  C-COMS can run more than 20 minutes by 20-second charge.  It will solve the biggest problem of EV and change our life-style.

3. Dependable Computing
by Prof. Shuichi Sakai(UT)

It is becoming more and more significant to preserve dependability of information systems, as they have been taking a central part in the modern society. Here, we define "dependability" as complex of reliability, security, availability, robustness and extensibility. This presents our research on making computer architecture, operating systems, invasion detection systems, application software much more dependable than the current ones.

4. A VLSI Brain System Mimicking the Processing in the Mind
by Prof. Tadashi Shibata(UT)

The research aiming at building human-like perception and understanding systems best utilizing the state-of-the-art silicon VLSI technology is presented. Instead of building electronic circuits following the physiological reality in biological systems, we are rather mimicking the processing going on in our mind. Based on the basic assumption that the association to the past experience and the retrieval of the most similar event from the brain memory are the very basis of perception and understanding, we are developing a psychologically-inspired VLSI brain model system. How to implement such ideas in VLSI circuits using both analog and digital CMOS technologies is presented. The algorithms for image representation and its application to robust image perception are also presented and discussed.

5. Photonic Sensing - Fiber optic nerve systems for materials and structures that can feel pain –
  by Prof. Kazuo Hotate(UT)

We have been developing "fiber optic nerve systems" for "smart structures and smart materials," in which an optical fiber acts as sensor to measure distribution of strain and/or pressure along it.  By embedding the fiber in structures and materials, such as buildings, bridges, aircraft fuel-tanks and pipe-lines, we can realize health monitoring function for these.  We have created an original technology to analyze the distributed optical parameters along the fiber by use of synthesis of correlation characteristics of continuous lightwave.  Adopting this technology, "fiber optic nerve systems," which have quite a high spatial resolution and measurement speed, have been established.

6. Advances in Quantum Dots for Nanophotonics and Quantum ICT
by Prof. Yasuhiko Arakawa(UT)

In 1982, we proposed the concept of "quantum dot" which realizes three-dimensional quantum mechanical confinement as well as a new type of semiconductor lasers named quantum dot lasers and quantum wire lasers. The unique feature of the atomic-like discrete states in the semiconductor quantum dots is capability of controlling not only energy states and/or spin of electrons but also electrical injection of individual electrons. Due to these features, the research on the quantum dots has brought up new evolutions in solid state physics as well as development of nanoelectronics and  nanophotonics, including
(i) quantum dot lasers, optical amplifiers and photo-detectors
(ii) single electron transistors and related nano-devices
(iii) quantum information devices such as single photon emitters and qubit devices
(iv) luminescence markers for bio-medical applications.
In this talk, we discuss recent advances in high performance quantum dot lasers and amplifiers for telecommunication photonic network. We also address application of the quantum dots to single photon emitters for future quantum information technologies, including some aspects of fundamentals of single dot effects such as g-factor control and the fine structure splitting.


Abstracts of Presentations by SNU Professors

1. Autonomous Microgrid Operation in Power System
by Prof. Seung-Il Moon(SNU)

Recently, due to the increase of distributed generation (DG) at distribution network in power system, operation of DG with conventional power system components has become a significant issue for operator and manufacturer of DG. In some areas, the increase of small DGs can reach such a high penetration depth that this area can be operated as an autonomous microgrid. Autonomous operation that is proposed by CERTS means that the microgrid is operated more or less decoupled from the grid, and even totally decoupled for example in case of emergency or if needed by the utility. Autonomous operation of microgrid makes full use of installed DGs with additional control system for connection, synchronization, disconnection, operation and islanding operation. In Korea, although there are many researches on the renewable generation system as DG especially on wind power generation, studies about microgrid operation with high penetration of DGs are not carried out sufficiently. Therefore, there are only passive operating policies which have complicated criteria of DG interconnection and they do not allow the islanding operation in case of fault in conventional power system. In this point, the Korean power system has to make an effort to develop the operation technology of DG and microgrid in active and autonomous operating policy. In this presentation, the definition and autonomous operation of microgrid will be explained and projects that accomplished by our lab to study the microgrid operation are introduced.

2. Control of Rubber Tyred Gantry Crane with Super Capacitor
by Prof. Seung-Ki Sul(SNU)

The Rubber Tyred Gantry Crane(RTGC) has been widely used at ports to handle containers box for loading and unloading purposes. Conventionally, RTGC uses a large engine to support a transient peak load, and the regenerated energy coming from lowering container box has been dissipated at breaking resistor. With super capacitor, the size of engine can be shrunk very much and the regenerated energy can be recuperated. In this presentation real application example will be shown and the energy saving results from the field test data will be revealed.

3. Reliable Multimedia Communication on Wireless Networks
by Prof. Heonshik Shin(SNU)

Information conveyed over wireless networks is intrinsically susceptible to errors from various sources of disruption. As wireless connections have been widely used especially in multimedia communications, their reliability is critical to timely delivery of multimedia data in the acceptable quality. In this talk, we review the reliability issues in wireless communication and present a case study on error recovery for multimedia communication over 3G cellular broadcast networks.

4. Fast perspective volume rendering using a GPU based acceleration technique for Virtual Colonoscopy
by Prof. Yeong Gil Shin(SNU)

Recent advances in graphics processing unit (GPU) have enabled direct volume rendering at interactive rates. However, the conventional methods for accelerating CPU-based volume rendering cannot be directly applied to accelerate GPU-based volume rendering, because of the architectural differences between CPU and GPU. This lecture will review the GPU based acceleration technique such as the empty space leaping, the early ray termination, and the optimized rendering pipeline for fast perspective volume rendering. This perspective volume rendering technique can be applied to virtual colonoscopy for helping diagnose colon cancer.

5. Coded Optical Time Domain Reflectometry : Principle and Applications
by Prof. Namkyoo Park(SNU)

In the past few years, the successful use of coding gain for various OTDR applications (communications systems, distributed sensors) has been demonstrated. Using a set of coded pulse sequences instead of conventional isolated single pulse, one can effectively increase the total probe pulse power while retaining the spatial resolution provided by the isolated pulsewidth thus to achieve increased SNR. Without any modifications in the OTDR hardware or penalties in the spatial resolution, coded OTDR could provide significant enhancement (~10dB) in the SNR value. In this paper, we will briefly outline our contributions for the physical realization and applications of coded OTDR : 1) high-speed surveillance system for 16 ports x 32 nodes (512 users) WDM-PON system and 2) Raman-based, long-reach distributed temperature sensor (DTS) systems.

6. Design and Analysis for Plasmonics
by Prof. Byoungho Lee(SNU)

Recently plasmonics, which is the combination of surface plasmon waves and photonics, has become a very important issue among not only physicists but also optical engineers. Laser may induce surface plasmon polaritons at the boundaries between a metal and a dielectric medium if appropriate phase matching condition is satisfied. In this talk I will discuss the numerical analysis method using parallel computing for analyzing diffractive optics in plasmonics. Especially, off-axis laser beaming devices will be discussed in detail. The device has a slit on metal and has non-symmetrically designed dielectric gratings next to the slit. It will be shown that this technique has a potential in chip-to-chip optical interconnection. Several other potentials of plasmonic devices will also be discussed.