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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Transactions of the Society of Information Storage Systems
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The Society of Information Storage Systems
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Volume & Issues
Volume 8, Issue 2 - Sep 2012
Volume 8, Issue 1 - Mar 2012
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Formation of Quantum Dot Fluorescent Monolayer Film using Peptide Bond
Inami, Watau ; Nanbu, Koichi ; Miyakawa, Atsuo ; Kawata, Yoshimasa ;
Transactions of the Society of Information Storage Systems, volume 8, issue 1, 2012, Pages 1~5
DOI : 10.9797/TSISS.2012.8.1.001
We present a method for preparing a quantum dot fluorescent monolayer film on a glass substrate. Since nanoparticles aggregate easily, it is difficult to prepare a nanoparticle monolayer film. We have used a covalent bond, the peptide bond, to fix quantum dots on the glass substrate. The surface of the quantum dot was functionalized with carboxyl groups, and the glass substrate was also functionalized with amino groups using a silane coupling agent. The carboxyl group can be strongly coupled to the amino group. We were able to successfully prepare a monolayer film of CdSe quantum dots on the glass substrate.
Design Approach and Structural Analysis for Development of a Micro-Wear Tester
Yoo, Shin-Sung ; Kim, Dae-Eun ;
Transactions of the Society of Information Storage Systems, volume 8, issue 1, 2012, Pages 6~10
DOI : 10.9797/TSISS.2012.8.1.006
The tribological behavior of microsystems needs to be clearly understood in order to improve the reliability of precision components. For example, friction and wear phenomena pose serious problems in MEMS applications. As a first step to investigate the tribological behavior of such systems, an appropriate testing system must be acquired. In this work, a micro-wear tester based MEMS platform was designed. The main concern was to achieve a desirable range of horizontal displacement for the specimen holder and also to apply a normal force in the tens of
range. The structural analysis of the micro-wear tester showed that the proposed design satisfied these requirements while maintaining the structural integrity.
Compensation Method of Mechanical Error for Micro Holographic Storage
Min, Cheol-Ki ; Jeon, Sung-Bin ; Cho, Chang-Hyun ; Kim, Do-Hyung ; Park, No-Cheol ; Yang, Hyun-Seok ; Park, Kyoung-Su ; Park, Young-Pil ;
Transactions of the Society of Information Storage Systems, volume 8, issue 1, 2012, Pages 11~15
DOI : 10.9797/TSISS.2012.8.1.011
In this paper, we experimentally investigated compensation method of the mechanical errors for the micro holographic storage. The aim of this research was overcome of disc tilt and spherical aberration problems. The proposed method was performed by using glass plate and zoom optics.
Calibration of SAW Based Capacitive Sensor Using Lumped Component and High Precision Gap Measurement
Kim, Jae-Geun ; Ko, Byung-Han ; Park, Young-Pil ; Park, No-Cheol ;
Transactions of the Society of Information Storage Systems, volume 8, issue 1, 2012, Pages 16~21
DOI : 10.9797/TSISS.2012.8.1.016
SAW device is widely used as filters, sensors, actuators in various technologies. And capacitive sensor is tremendously used to measure pressure, gap, etc. The application of SAW device as signal conditioner of capacitive sensor reduces noise level and enables high precision measurement. The response increase of SAW based capacitive sensor is produced just before the two capacitive electrode contacts by the existence of parasitic resistance of capacitive electrode. In this paper, we analyze the effects of parasitic resistance and propose the calibrating method using lumped component and execute the high precision gap measurement using calibrated system. And xx nm resolution and yy
stroke was attained.
Vibration Source Identification and Finite Element Model Construction of Optical Disk Drive
Oh, Won-Seok ; Lim, Seung-Ho ; Park, No-Cheol ; Park, Kyoung-Su ; Park, Young-Pil ; Yoo, Seugng-Hon ; Lee, Han-Baek ;
Transactions of the Society of Information Storage Systems, volume 8, issue 1, 2012, Pages 22~26
DOI : 10.9797/TSISS.2012.8.1.022
Optical disk drives (ODDs) are subjected to vibrations caused by the high-speed rotation of the optical disk, and these vibrations can be excessive and reduce the read/write performance. Elastic rubber mounts with cushioning materials are often used to minimize these problems. In this paper, the source of vibrations was identified by experimental modal tests and high-speed photography. Structural modifications were made based on a lumped parameter model and a finite element model.
Variation of the dynamic coefficients of the plain journal bearing considering vapor pressure
Seo, Jun-Ho ; Park, Jae-Hong ; Rhim, Yoon-Chul ;
Transactions of the Society of Information Storage Systems, volume 8, issue 1, 2012, Pages 27~32
DOI : 10.9797/TSISS.2012.8.1.027
Fluid dynamic bearings have several advantages that low noise, high rotational stability and low friction. So, early 2000s, the HDD spindle motors have been replaced ball bearings to fluid dynamic bearing. Most of studies apply inner boundary condition that is inside of bearing pressure larger than atmosphere pressure. Therefore, they used Half-Sommerfeld or Reynolds Boundary condition. This paper investigates the dynamic coefficients of the plain journal considered vapor pressure. As a result, it shows that the vapor pressure effect cannot ignore.
Analysis of load/unload process in HAMR system with light delivery
Kim, Seok-Hwan ; Kim, Ki-Hoon ; Park, Young-Pil ; Park, No-Choel ; Park, Kyoung-Su ;
Transactions of the Society of Information Storage Systems, volume 8, issue 1, 2012, Pages 33~38
DOI : 10.9797/TSISS.2012.8.1.033
To investigate of load/unload performance, FE (finite element) model of conventional suspension and HAMR suspension were made. The FE models were verified by modal analysis. In the loading simulation, the conventional system could stably load onto the disk without contact. On the other hand, the HAMR suspension which had an optical fiber and prism occurred slider - disk contact. In the unloading process, the conventional system was unloaded without contact. However, in the HAMR suspension, the contact between slider and disk was occurred at the moment that the dimple was separated during unload process. Therefore the load/unload performance of HAMR decrease with high stiffness, it is necessary that stiffness of HAMR suspension should reduced with design parameters of optical fiber and prism.