A Study on Underground Communication System Using a Horizontal Small Antenna

Aiming at the communication system breakdown after coal mine explosions collapses and other accidents, this paper puts forward an efficient construction method for long distance of wireless communication system in emergency with coal mind rescue robots which are self-adaptive and self-networking. With a two-level robotic system of detecting-robot and carrying-robot as the main, the carrying-robot, equipped with distributing device which contains a "roly-poly" wireless repeater, enters into an accident underground, analyzes the underground communication environment via network monitoring system, controls the distributing device and safely distributes the repeaters in order to realize secure and reliable communication with underground coal mine rescue robot. The test shows that the wireless communication system for emergency is rational, feasible, safe and reliable.

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Design and Implementation of Magnetic Induction based Wireless Underground Communication System Supporting Distance Measurement

KSII Transactions on Internet and Information Systems ◽

10.3837/tiis.2019.08.023 ◽

2019 ◽

Vol 13 (8) ◽

Keyword(s):

Magnetic Induction ◽

Communication System ◽

Distance Measurement ◽

Design And Implementation ◽

Underground Communication

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AAC Decision-Making and Mobile Technology: Points to Ponder

Perspectives on Augmentative and Alternative Communication ◽

10.1044/aac23.2.104 ◽

2014 ◽

Vol 23 (2) ◽

pp. 104-111 ◽

Cited By ~ 6

Author(s):

Mary Ann Abbott ◽

Debby McBride

Keyword(s):

Decision Making ◽

Mobile Technology ◽

Communication System ◽

Augmentative And Alternative Communication ◽

Evaluation Process ◽

Decision Making Process ◽

Alternative Communication ◽

Ipod Touch ◽

Feature Match

The purpose of this article is to outline a decision-making process and highlight which portions of the augmentative and alternative communication (AAC) evaluation process deserve special attention when deciding which features are required for a communication system in order to provide optimal benefit for the user. The clinician then will be able to use a feature-match approach as part of the decision-making process to determine whether mobile technology or a dedicated device is the best choice for communication. The term mobile technology will be used to describe off-the-shelf, commercially available, tablet-style devices like an iPhone®, iPod Touch®, iPad®, and Android® or Windows® tablet.

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A Community Based High Risk Register for Hearing Loss

Journal of Speech and Hearing Disorders ◽

10.1044/jshd.4704.373 ◽

1982 ◽

Vol 47 (4) ◽

pp. 373-375 ◽

Cited By ~ 2

Author(s):

James L. Fitch ◽

Thomas F. Williams ◽

Josephine E. Etienne

Keyword(s):

Hearing Loss ◽

System Identification ◽

High Risk ◽

Language Learning ◽

Education Program ◽

Communication System ◽

Auditory Signal ◽

Early Age ◽

Community Based ◽

Children With Hearing Loss

The critical need to identify children with hearing loss and provide treatment at the earliest possible age has become increasingly apparent in recent years (Northern & Downs, 1978). Reduction of the auditory signal during the critical language-learning period can severely limit the child's potential for developing a complete, effective communication system. Identification and treatment of children having handicapping conditions at an early age has gained impetus through the Handicapped Children's Early Education Program (HCEEP) projects funded by the Bureau of Education for the Handicapped (BEH).

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