Nara Institute of Science and Technology (NAIST)

will present a Seminar on IT and Materials Technologies.



Date: Tuesday August 21, 2007

Time: 9:30-5:00PM

Place: The University of California Santa Cruz Extension,

Sunnyvale Center, Moffett Business Park 1180 Bordeaux Drive

Sunnyvale, CA 94089




1. Development and Properties of Luminescent Chalcogenide Nanocrystals: application for solar cells and 3D optical disc

    by Professor T. Kawai


2. A Versatile Tool for the Diagnosis of Crystalline-Silicon Solar- Cells Utilizing

Electroluminescence: save production costs by sorting out defective solar-cells in an early stage

    by Professor T. Fuyuki 


------Lunch Break-------


3. Pocket-Size Real-Time Blind Source Separation Module for Hands-Free Speech

Acquisition: clear reception of cell-phone call from a very noisy place

    by Associate Professor H. Saruwatari


4. Tactile sensors for advanced robotics: tactile information processing for robotic

manipulation and human-machine interface

@@by Assistant Professor J. Ueda


5. CMOS Technologies for Biological and Medical Applications - Retinal Prosthesis, Brain Implantation and More: toward a bionic human

by Professor J. Ohta


6. Bio Nano Process - Fabrication of Inorganic Nanostructures by Protein Supramolecules:  a proposal of biological path to the nano electronic devices using self-organization and biomineralization

    by Visiting Professor I. Yamashita and Professor T. Fuyuki 



Registration: BEFORE August 7  There is no charge for this seminar,but we need an accurate count by August 7 in order to properly schedule

conference room space. 

Register today, to assure a seat.

Fax/email to: UC-Santa Cruz Extension: Nara Seminar 

1101 Pacific Avenue.  Suite 208

Santa Cruz, CA 95060

FAX :+1-831-427-1827

Email: Lena Tran,

For Resistration Information,please visit












1. Development and Properties of Luminescent Chalcogenide Nanocrystals by  Kawai


Highly emissive semiconductor nano-crystals are presented and their unique properties will be introduced.  The CdTe nanocrystals showing high emission quantum yield without marked degradation has no protecting semiconductor layer such as ZnS in CdSe nano-crystals.  Therefore, they act not only as the efficient emitting material but also as the photosensitizing materials in the photo-polymerization system.  Efficient high-density optical recording medium is also expected to be produced based on the nanocrystals.



@      Quantum Efficiency>90%


2. A Versatile Tool for the Diagnosis of Crystalline Silicon Solar Cells Utilizing Electroluminescence by Fuyuki


Crystalline silicon solar cells under the forward bias can emit infra-red light (so-called electroluminescence), the intensity of which reflects the number of minority carriers in the cell.  Deficiencies such as defects in the crystal, grain boundaries, and cracks which reduce the minority carrier density can be clearly detected as dark spots, lines, and areas due to decreased EL intensity. The result shows that the electroluminescence technique is a versatile tool to evaluate the cell fabrication process and cell performances


3a. Pocket-Size Real-Time Blind Source Separation Module for Hands-Free   

    Speech Acquisition by Saruwatari


Blind source separation (BSS) is an approach taken to estimate original sound sources using information of only the mixed signals detected by  multiple microphones. Recently much attention has been paid to BSS in many fields of acoustic signal processing such as cell-phone application and  noise-robust speech recognition. We describe our new BSS algorithm which consists of independent component analysis and binary masking, imitating human brain and ears, and the efficacy of the BSS.


Demonstration of Sound Separation Microphone


We demonstrate a recently-developed pocket-size BSS module.  The BSS module is applicable in many audio applications such as broadcasting from a very noisy place with eliminating background noise.


3b. Sound Separation Microphone by KOBELCO


Separate out one sound out of two mixed sound-sources. 

Delay time is less than 50msec. 


Can be connected to stereo microphone. 


4. Tactile Sensors for Advanced Robotics by Ueda


    Recent tactile sensing technologies and various applications will

    be introduced.

    - Vision-based Tactile Sensor and Slip Prediction Method

    - Fingerprint Pointing Device for Mobile Application

    - Teaching Playback of Dextrous Robot Manipulation

    - MRI Compatible Force Sensor

 (1) Robot Hand


 (2) Fingerprint Pointing Device

 (3) fMRI Compatible Sensor


5. CMOS Technologies for Biological and Medical Applications by Ohta

Recent development of CMOS technologies makes it possible to provide highly functional and versatile biomedical devices. I will present such examples as retinal prosthesis and brain implantation being carried out in my research laboratory, and address the future issues for bionic human using implantable CMOS technologies.




6.  Bio Nano Process: Fabrication of Inorganic Nanostructures  by Protein Supramolecules by Yamashita and Fuyuki 



The combination of self-organization and biomineralization of the bio-supramolecules can make it possible to fabricate inorganic structures with ease. The structure will function as key-components of the nano-electronic devices. So far, we have successfully produced memory nanodots array in the floating gate memory employing cage-shaped protein.  Further studies are progressing. 



`bvz` with electron-gas obN       

Schematic of a proposed application of the Bio Nano Process