• Proceedings of the KIEE Conference
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• 1998.07d
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• pp.1285-1287
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• 1998

Vibration measurements to monitor the condition of machinery and machine elements offers several advantages over traditional methods of nondestructive evaluation. RIST(Research Institute of Industrial Science & Technology) has established a calibration system for accelerometers that measures within a frequency range from 2Hz to 6,300Hz and a temperature range from $-40^{\circ}C$ to $180^{\circ}C$. The calibration procedures are based on the principle of the comparison method. To monitor vibration signals of machinery and machine elements, annular shear type piezoelectric accelerometers employing solid state microelectronics were fabricated. The voltage sensitivity and resonant frequency of fabricated accelerometers was 83mV/g, 23kHz, respectively. This paper discusses the method of fabrication of annular shear type piezoelectric accelerometers and the results of field tests in POSCO(Pohang Iron & Steel Co. LTD.).

• Proceedings of the IEEK Conference
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• 2003.07b
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• pp.779-782
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• 2003

The theoretical and experimental current-voltage characteristics of Erbium silicided n-type Schottky barrier tunneling transistors (SBTTs) are discussed. The theoretical drain current to drain voltage characteristics show good correspondence and the extracted Schottky barrier height is 0.24 eV. The experimentally manufactured n-type SBTTs with 60 nm gate lengths show typical transistor behaviors in drain current to drain voltage characteristics. The drain current on/off ratio is about 10$^{5}$ at low drain voltage regime in drain current to gate voltage characteristics.

• Proceedings of the Materials Research Society of Korea Conference
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• 2010.05a
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• pp.17.2-17.2
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• 2010

Printed electronics is an emerging technology to realize various microelectronic devices via a cost-effective method. Here we demonstrated a high performance of p-channel and n-channel top-gate/bottom contact polymer field-effect transistors (FETs), and applications to elementary organic complementary inverter and ring oscillator circuits by inkjet processing. We could obtained high field-effect mobility more than $0.4\;cm^2/Vs$ for both of p-channel and n-channel FETs, and successfully measured inkjet-printed polymer inverters. The performance of devices highly depends on the selection of dielectrics, printing condition and device architecture. Optimized CMOS ring oscillators with p-type and n-type polymer transistors showed as high as 50 kHz operation frequency. This research was financially supported by development of next generation RFID technology for item level applications (2008-F052-01) funded by the ministry of knowledge economy (MKE).

• Journal of Species Research
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• v.7 no.1
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• pp.73-79
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• 2018

The review provides the information about 46 type specimens on 35 taxa of vascular plants from Korea (Fig. 1), kept in the Herbarium of the Komarov Botanical Institute of the Russian Academy of Sciences in addition to 150 taxa published before. Lectotype of Ligustrum patulum Palib is designated here.

• Food Science and Biotechnology
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• v.14 no.5
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• pp.698-699
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• 2005

Levels of fumonisins, mycotoxins produced by fungal species, must be accurately and rapidly monitored to ensure food safety. In this study, using surface plasmon resonance sensor, a batch-type biosensor was fabricated to detect fumonisin $B_1$. By applying this biosensor to fumonisin $B_1$ solutions of 0 to 6 ppm, a significant calibration model was developed for measurement. Coefficient of determination in regression analysis for the model was 0.920. Results indicate that detection of fumonisin $B_1$ by surface plasmon resonance biosensor was highly feasible.

• Journal of Information Science Theory and Practice
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• v.1 no.2
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• pp.84-92
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• 2013

In this study, the properties of the object types required to describe the relationship among research data resources, which may be generated during the life cycle of the research, are derived. The properties of Fedora Commons and DSpace, which are open source software used for resource management, and schema properties published in DataCite were analyzed. Based on relation names of Fedora Commons, nine new relation names were derived. Thirty-eight object type properties consolidating the target properties of the analysis were derived. The result of this study can be used as basic material for crosswalk research studies of object type relation terms to ensure interoperability among the systems.

• Journal of Information Display
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• v.8 no.1
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• pp.14-17
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• 2007

The toner type paper-like display (PLD) has been developed with two polymer particles having opposite polarity composed of polymer, colorant and external additives (nano-sized silica). Nano-sized silica with triboelectric charge was used for the charge control agent (CCA) and influenced on the electrostatic properties of the silica-coated polymer particles. The surface morphology and the cohesiveness of silica-coated polymer particles were changed with the silica coating time. From these results, it was verified that the PLD cell using silica-coated particles (200 seconds) shows a good white appearance and low driving voltage.

• ETRI Journal
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• v.27 no.6
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• pp.818-821
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• 2005

Recently, MPEG has opened activity to standardize scene representation for lightweight applications such as in mobile phones. The standard is named lightweight applications scene representation (LASeR) and can be applied to improve and make efficient rich media applications and services on mobile devices. In this standard, we proposed an efficient type codec for point data to maximize the bit efficiency of LASeR. In this paper, we describe the new method and the test results of the proposed scheme.

• Proceedings of the Korean Geotechical Society Conference
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• 2009.09a
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• pp.350-358
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• 2009

To enhance the application of the reinforced retaining walls in the railway industry, this paper suggested a type of reinforcement subgrade with short reinforcement and rigid facing. To become popular the reinforced retaining walls in the industry, the deformation of retaining walls should be controlled below some limited level. In this paper, small scale and full scale tests of the proposed retaining walls were performed and their deformation characteristics were evaluated. Even though it has short reinforcement, the rigid type retaining wall had small deformation to the external train loading than the segmental type retaining wall had.

• Journal of the Semiconductor & Display Technology
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• v.7 no.2
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• pp.29-33
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• 2008

LCD panels are increasingly used to show moving image material, for example in LCD television sets. However, moving images become blurred on LCD panels. One of the causes of motion blur is the slow reaction of LC(liquid crystal) cell to change in the pixel value. Another cause of motion blur is the hold-type characteristic of the LCD panel, during the frame time the image is shown continuously. This type of motion blur can be reduced with a scanning backlight. We have designed and fabricated a scanning backlight system that solves the hold-type characteristic problem in a way that Flat fluorescent lamp divided 6 blocks was scanned 60Hz.