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      저자 : C. Thanachayanont (검색결과 3 건)
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        MEH-PPV/CdS Nanorod Polymer Solar Cells

        C. Thanachayanont,K. lnpor,S. Sahasithiwat,V. Meeyoo 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5

        This research was conducted to experimentally screen the suitability of acrylamido-2-methylpropane sulfonic acid-acrylamide (AMPS-AM) copolymer-based nanogels for using as sealants to shut-off water channels in the high-temperature and high-salinity reservoir conditions of the White Tiger oil field. Via in situ intercalative free-radical copolymerization, nanogels have been prepared from montmorillonite-alkyl ammonium clay, AMPS and AM. Two primary compositions of nanogel systems were chosen. A mixture of hexamethylenetetramine (HMTA)/phenyl acetate (PhAc) was used as a crosslinking system. The results obtained from screening the gel properties by using the bottle test method, the test under nitrogen pressure and core flooding under imitated reservoir conditions show that the NANOSEAL-1 and the NANOSEAL-2 nanogels can well satisfy the VietsovPetro (VSP) technical requirements for water isolation materials. This research was conducted to experimentally screen the suitability of acrylamido-2-methylpropane sulfonic acid-acrylamide (AMPS-AM) copolymer-based nanogels for using as sealants to shut-off water channels in the high-temperature and high-salinity reservoir conditions of the White Tiger oil field. Via in situ intercalative free-radical copolymerization, nanogels have been prepared from montmorillonite-alkyl ammonium clay, AMPS and AM. Two primary compositions of nanogel systems were chosen. A mixture of hexamethylenetetramine (HMTA)/phenyl acetate (PhAc) was used as a crosslinking system. The results obtained from screening the gel properties by using the bottle test method, the test under nitrogen pressure and core flooding under imitated reservoir conditions show that the NANOSEAL-1 and the NANOSEAL-2 nanogels can well satisfy the VietsovPetro (VSP) technical requirements for water isolation materials.

      • A Single-Chip CMOS Digitally Synthesized 0-35 MHz Agile Function Generator

        C. Meenakarn,A. Thanachayanont 대한전자공학회 2002 ITC-CSCC :International Technical Conference on Ci Vol.2002 No.7

      • Improved CMOS Dynamic D-type Flip-Flops for High-Speed Dual-Modulus Prescaler

        C. Fangkaew,A. Thanachayanont 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7

        This paper presents new dynamic D-type flipflops (D-FFs) for high-speed dual-modulus prescaler. Using True-Single-Phase-Clock (TSPC) and ratioed logic techniques, the new DFFs are realized with minimum number of transistors, reduced glitch and charge-sharing problems, and thus enabling very high speed operation. To demonstrate the performance of the proposed DFFs, a divide-by-128/129 dual-modulus prescaler has been realized. Simulation results using Spectre with 0.35-㎛ CMOS process parameters show that the prescaler has the maximum operating frequency of 4.4 ㎓ while dissipating 25.6 ㎽ under a 3.3 V power supply voltage.

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