Browsing by Author Duong, Anh Tuan

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  • Authors: Do, Trung Tuan; Duong, Anh Tuan (2007)

  • Researches on deductive database systems are not new ones, but propose of data model allowing manipulating data and knowledge on a particular framework is not easy but interesting goal. The paper aims at a model for knowledge in educational and training environment, beside of a presenting the achievement in the existing systems conceming knowledge. Certain data manipulation techniques for knowledge acquisition are proposed in the model, as knowledge discovering techniques in deductive database systems.

  • 62.pdf.jpg
  • Article


  • Authors: Nguyen, Van Hung; Duong, Anh Tuan; Trinh, Duc Thien; Nguyen, Dang Phu; Danh, Bich Do; Pham, Van Vinh (2012)

  • CdTe quantum dots dispersed in water were prepared successfully by the microwave irradiation method. The influence of the pH value of the solution precursor, irradiation time and microwave power on the structure, size and optical properties of CdTe quantum dots was investigated. The fluorescence of CdTe quantum dots studies were illustrated that the samples which were synthesized at pH value of 7 exhibited the best fluorescence. The absorption, fluorescence spectra and TEM images showed that the microwave power and the irradiation time influenced significantly on the size of CdTe quantum dot as well as their optical properties. The fluorescence spectra were red-shift with the increase...

  • Temperature Gradient A Simple Method for Single Crystal Growth.pdf.jpg
  • Article


  • Authors: Duong, Anh Tuan; Nguyen, Thi Thanh Huong; Nguyen, Thi Minh Hai; Pham, Anh Tuan; Dinh, Thi My Hao; Cho, Sunglae (2019)

  • In this article, we provide a simple method for growth of bulk single crystalline. By the control temperature along a vertical furnace, we can easily fabricate bulk single crystals. This technique is called the temperature gradient method. To create a temperature gradient along the body of the furnace, the density of resistance wire which is coiled along the body of furnace is different. The density increases from the bottom to the top of the furnace. So that, at any time of the growing process, the temperature at the bottom of furnace is the smallest. During could down process, single crystal in the ampoule has been grown up from a seed at the bottom. Using this method, we successful...

Browsing by Author Duong, Anh Tuan

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 3 of 3
  • 159.pdf.jpg
  • Article


  • Authors: Do, Trung Tuan; Duong, Anh Tuan (2007)

  • Researches on deductive database systems are not new ones, but propose of data model allowing manipulating data and knowledge on a particular framework is not easy but interesting goal. The paper aims at a model for knowledge in educational and training environment, beside of a presenting the achievement in the existing systems conceming knowledge. Certain data manipulation techniques for knowledge acquisition are proposed in the model, as knowledge discovering techniques in deductive database systems.

  • 62.pdf.jpg
  • Article


  • Authors: Nguyen, Van Hung; Duong, Anh Tuan; Trinh, Duc Thien; Nguyen, Dang Phu; Danh, Bich Do; Pham, Van Vinh (2012)

  • CdTe quantum dots dispersed in water were prepared successfully by the microwave irradiation method. The influence of the pH value of the solution precursor, irradiation time and microwave power on the structure, size and optical properties of CdTe quantum dots was investigated. The fluorescence of CdTe quantum dots studies were illustrated that the samples which were synthesized at pH value of 7 exhibited the best fluorescence. The absorption, fluorescence spectra and TEM images showed that the microwave power and the irradiation time influenced significantly on the size of CdTe quantum dot as well as their optical properties. The fluorescence spectra were red-shift with the increase...

  • Temperature Gradient A Simple Method for Single Crystal Growth.pdf.jpg
  • Article


  • Authors: Duong, Anh Tuan; Nguyen, Thi Thanh Huong; Nguyen, Thi Minh Hai; Pham, Anh Tuan; Dinh, Thi My Hao; Cho, Sunglae (2019)

  • In this article, we provide a simple method for growth of bulk single crystalline. By the control temperature along a vertical furnace, we can easily fabricate bulk single crystals. This technique is called the temperature gradient method. To create a temperature gradient along the body of the furnace, the density of resistance wire which is coiled along the body of furnace is different. The density increases from the bottom to the top of the furnace. So that, at any time of the growing process, the temperature at the bottom of furnace is the smallest. During could down process, single crystal in the ampoule has been grown up from a seed at the bottom. Using this method, we successful...