Browsing by Author Nguyen, Tuan Anh

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 9 of 9
  • item.jpg
  • Article


  • Authors: Vu, Ngoc Cham; Nguyen, Tuan Anh (2018)

  • A federation is usually an alliance of organisations where users from one organisation are trusted to access resources in another organisation. The membership of federations is diverse and continually changing. Federations require distributed and dynamic security policy management to meet these challenges. We propose an authorisation policy management model, FABACD, which simplifies the management of collaborations between organisations. It allows distributed and trusted administrators to adjust the authorisation policies in a resource holding organisation, whilst ensuring that the latter remains in ultimate control. The net result is that a resource’s authorisation system is able t...

  • 233.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Phung, Quoc Bao (2003)

  • A simple model is proposed to evaluate the number of amplifiers and the required power in optical fibre transmission systems using a chain of EDFA. The model requires only knowledge of the overall gain of the amplifier chain, the noise figure and the amplifier spacing beside the line's parameters. The influence of attenuation and dispersion of the fiber cable are also taken into account.

  • document.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Ngo, Thi Hoa; To, Thi Xuan Hang; Nguyen, Thuy Duong; Trinh, Anh Truc (2017)

  • Zinc aluminum hydrotalcite containing 2-benzothiazolythio-succinic acid (HT-BTSA) and modified by 2-aminoethyl-3-aminopropyltrimethoxysilane (APS) at different concentrations (3%, 5% and 10%). APS modified HT-BTSA (HT-BTSA-S) was incorporated in epoxy coatings at 3% concentration. The corrosion protective performance of the epoxy coatings containing HT-BTSA-S were evaluated by electrochemical impedance spectroscopy, adhesion measurement. The results showed that the presence of HT-BTSA-S improved protection performance of epoxy coating and the best protection was obtained with HT-BTSA modified with 5 % APS.

  • 106.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Bach, Gia Duong; Nguyen, Xuan Thai (2010)

  • The Texas Instrument TMS320VC55I0 DSK's calculation abilitiy with different program languages is investigated for minimum the DSP's measurement time. The steps of Monte Carlo simulations embedded into the DSK's flash through the DSK's JTAG interface for optical parameters measurement including absorption coefficient7.t,, scattering coefficient F, and anisotropy 8'are presented. The obtained results for diluted milk standard samples are also reported.

  • 112.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Nguyen, Xuan Thai; Phung, Quoc Bao; Bach, Gia Duong (2010)

  • A real-time and simultaneous processing system with 8 analog inputs is designed. The system is based on the development of Texas Instrument TMS320VC5510 DSK kit. The analog input signals are converted into digital ones by 8 bit ADC module using ADC0809. The ADC module interfaces to the DSP in parallel, through the DSP's Memory Expansion Connector. The measurement with standard input signals fom FUNCTION GENERATOR LG1311 is also reported.

  • 16.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Didier, Decoster; Au, Thi Huong (2016)

  • In the manufacturing processes of high-power laser diode modules, the module packaging technologies play an important role; decide the efficiency of the electro-optical conversation, the beam quality and the lifetime. This paper presents the packaging of high-power laser diode modules from single chip, evaluating the electro-optical characteristics and the beam quality of the modules. The obtained results show that the packaged module has an output optical power of 5 W at current 5.9 A; the Operation Voltage is 1.7 V; the Threshold Current is 1,0 A; the Divergence Angle Mean is 36.8 degree and the Asymmetry is 1.04. These parameters are almost the same that of some on-stock modules. ...

  • 239.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Phung, Quoc Bao (2003)

  • EDFA's technical parameters and the influence of fiber cable attenuation, of fiber cable dispersion are evaluated to meet optical transmission system's requirements. The type and the number of EDFA are optimized. The maximal length of the communications line is also calculated.

  • item.jpg
  • Article


  • Authors: Nguyen, Tuan Anh (2018)

  • Hedging enables academic writers to mitigate claims and minimize the impositions that may be found in such claims (Hyland, 1996). Although the literature has had vast research on hedging in research articles, not much has been known about the difference or similarity among journals in one feld in the use of hedging devices. Using the document analysis method, the present study aims to make a comparative analysis of hedging in two linguistics research journals, namely Reading in a Foreign Language (RFL) and English Language Teaching (ELT), in order to investigate what hedging forms and functions are most frequently used in RFL and ELT, and how hedging forms and functions are distribute...

Browsing by Author Nguyen, Tuan Anh

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 9 of 9
  • item.jpg
  • Article


  • Authors: Vu, Ngoc Cham; Nguyen, Tuan Anh (2018)

  • A federation is usually an alliance of organisations where users from one organisation are trusted to access resources in another organisation. The membership of federations is diverse and continually changing. Federations require distributed and dynamic security policy management to meet these challenges. We propose an authorisation policy management model, FABACD, which simplifies the management of collaborations between organisations. It allows distributed and trusted administrators to adjust the authorisation policies in a resource holding organisation, whilst ensuring that the latter remains in ultimate control. The net result is that a resource’s authorisation system is able t...

  • 233.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Phung, Quoc Bao (2003)

  • A simple model is proposed to evaluate the number of amplifiers and the required power in optical fibre transmission systems using a chain of EDFA. The model requires only knowledge of the overall gain of the amplifier chain, the noise figure and the amplifier spacing beside the line's parameters. The influence of attenuation and dispersion of the fiber cable are also taken into account.

  • document.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Ngo, Thi Hoa; To, Thi Xuan Hang; Nguyen, Thuy Duong; Trinh, Anh Truc (2017)

  • Zinc aluminum hydrotalcite containing 2-benzothiazolythio-succinic acid (HT-BTSA) and modified by 2-aminoethyl-3-aminopropyltrimethoxysilane (APS) at different concentrations (3%, 5% and 10%). APS modified HT-BTSA (HT-BTSA-S) was incorporated in epoxy coatings at 3% concentration. The corrosion protective performance of the epoxy coatings containing HT-BTSA-S were evaluated by electrochemical impedance spectroscopy, adhesion measurement. The results showed that the presence of HT-BTSA-S improved protection performance of epoxy coating and the best protection was obtained with HT-BTSA modified with 5 % APS.

  • 106.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Bach, Gia Duong; Nguyen, Xuan Thai (2010)

  • The Texas Instrument TMS320VC55I0 DSK's calculation abilitiy with different program languages is investigated for minimum the DSP's measurement time. The steps of Monte Carlo simulations embedded into the DSK's flash through the DSK's JTAG interface for optical parameters measurement including absorption coefficient7.t,, scattering coefficient F, and anisotropy 8'are presented. The obtained results for diluted milk standard samples are also reported.

  • 112.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Nguyen, Xuan Thai; Phung, Quoc Bao; Bach, Gia Duong (2010)

  • A real-time and simultaneous processing system with 8 analog inputs is designed. The system is based on the development of Texas Instrument TMS320VC5510 DSK kit. The analog input signals are converted into digital ones by 8 bit ADC module using ADC0809. The ADC module interfaces to the DSP in parallel, through the DSP's Memory Expansion Connector. The measurement with standard input signals fom FUNCTION GENERATOR LG1311 is also reported.

  • 16.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Didier, Decoster; Au, Thi Huong (2016)

  • In the manufacturing processes of high-power laser diode modules, the module packaging technologies play an important role; decide the efficiency of the electro-optical conversation, the beam quality and the lifetime. This paper presents the packaging of high-power laser diode modules from single chip, evaluating the electro-optical characteristics and the beam quality of the modules. The obtained results show that the packaged module has an output optical power of 5 W at current 5.9 A; the Operation Voltage is 1.7 V; the Threshold Current is 1,0 A; the Divergence Angle Mean is 36.8 degree and the Asymmetry is 1.04. These parameters are almost the same that of some on-stock modules. ...

  • 239.pdf.jpg
  • Article


  • Authors: Nguyen, Tuan Anh; Phung, Quoc Bao (2003)

  • EDFA's technical parameters and the influence of fiber cable attenuation, of fiber cable dispersion are evaluated to meet optical transmission system's requirements. The type and the number of EDFA are optimized. The maximal length of the communications line is also calculated.

  • item.jpg
  • Article


  • Authors: Nguyen, Tuan Anh (2018)

  • Hedging enables academic writers to mitigate claims and minimize the impositions that may be found in such claims (Hyland, 1996). Although the literature has had vast research on hedging in research articles, not much has been known about the difference or similarity among journals in one feld in the use of hedging devices. Using the document analysis method, the present study aims to make a comparative analysis of hedging in two linguistics research journals, namely Reading in a Foreign Language (RFL) and English Language Teaching (ELT), in order to investigate what hedging forms and functions are most frequently used in RFL and ELT, and how hedging forms and functions are distribute...