Growth of underwater communication technology in the U.S. Navy

2009 ◽  
Vol 47 (1) ◽  
pp. 80-82 ◽  
Author(s):  
R. Headrick ◽  
L. Freitag
Keyword(s):  
Communication Technology ◽  
Underwater Communication ◽  
The U.S

scholarly journals A Self-Powered Transparent Photodetector Based on Detached Vertical (In,Ga)N Nanowires with 360° Omnidirectional Detection for Underwater Wireless Optical Communication

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2959
Author(s):  
Jianya Zhang ◽  
Min Jiang ◽  
Lifeng Bian ◽  
Dongmin Wu ◽  
Hua Qin ◽  
...  
Keyword(s):  
Communication Technology ◽  
Optical Communication ◽  
Indium Tin Oxide ◽  
Underwater Communication ◽  
Wireless Optical Communication ◽  
Underwater Environment ◽  
Ito Glass ◽  
Ascii Code ◽  
Self Powered ◽  
Lift Off

Underwater wireless optical communication (UWOC) is a wireless communication technology using visible light to transmit data in an underwater environment, which has wide applications. Based on lift-off (In,Ga)N nanowires, this work has proposed and successfully demonstrated a self-powered photoelectrochemical (PEC) photodetector (PD) with excellent transmissivity. The transparent functionality of the PD is critical for 360° omnidirectional underwater detection, which was realized by detaching the (In,Ga)N nanowires from the opaque epitaxial substrates to the indium tin oxide (ITO)/glass. It was also found that the insulating SiO2 layer can enhance the photocurrent by about 12 times. The core–shell structure of the nanowires is beneficial for generating carriers and contributing to the photocurrent. Furthermore, a communication system with ASCII code is set to demonstrate the PD detection in underwater communication. This work paves an effective way to develop 360° omnidirectional PDs for the wide applications in UWOC system and underwater photodetection.

scholarly journals Using HortBase

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 555C-555
Author(s):  
Jim Green
Keyword(s):  
Communication Technology ◽  
Agricultural Education ◽  
Wide Distribution ◽  
Electronic Information ◽  
International Dimension ◽  
Transnational Cooperation ◽  
Multimedia Network ◽  
Electronic Information System ◽  
The U.S ◽  
Individual Information

How can HortBase and other electronic information systems benefit horticulturists in developing countries? If Nation-wide distribution of the workload and costs of creation, review, revision, and distribution of individual information files to produce an electronic information system for decision support can be achieved in the U.S., can this collaboration occur world-wide? The European Agricultural Multimedia Network (http://www.stoas.nl/mmnet/), established in 1995, is an international network of more than 37 European institutes and organizations that are active in agricultural education. Its goals are to exchange knowledge and ideas and foster cooperation in development and exchange of agricultural education and extension multimedia products. EUROPEA, created in 1993, is a network of about 500 agricultural colleges and institutes in Europe to optimize transnational cooperation in development of distance education and lifelong learning and to provide an international dimension to students. The international membership of ASHS coupled with global communication technology facilitates global collaboration on information development and access.

Historical Introduction

1977 ◽  
Vol 35 ◽  
pp. 2-5
Author(s):  
R. D. Heidenreich
Keyword(s):  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
50Th Anniversary ◽  
Secondary Emission ◽  
Wave Nature ◽  
Nobel Prize In Physics ◽  
Primary Electrons ◽  
The U.S ◽  
Mutual Agreement

This program has been organized by the EMSA to commensurate the 50th anniversary of the experimental verification of the wave nature of the electron. Davisson and Germer in the U.S. and Thomson and Reid in Britian accomplished this at about the same time. Their findings were published in Nature in 1927 by mutual agreement since their independent efforts had led to the same conclusion at about the same time. In 1937 Davisson and Thomson shared the Nobel Prize in physics for demonstrating the wave nature of the electron deduced in 1924 by Louis de Broglie.The Davisson experiments (1921-1927) were concerned with the angular distribution of secondary electron emission from nickel surfaces produced by 150 volt primary electrons. The motivation was the effect of secondary emission on the characteristics of vacuum tubes but significant deviations from the results expected for a corpuscular electron led to a diffraction interpretation suggested by Elasser in 1925.

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