The attache case size message communication system via satellite links

1992 ◽  
Vol 41 (4) ◽  
pp. 537-543 ◽  
Author(s):  
N. Kadowaki ◽  
S. Maruyama ◽  
R. Suzuki ◽  
Y. Hase ◽  
S. Ohmori
Keyword(s):  
Communication System ◽  
Message Communication ◽  
Satellite Links

Research on End-To-End SMS Confidential Communication System

2013 ◽  
Vol 336-338 ◽  
pp. 1744-1747
Author(s):  
Yan Su ◽  
Zhi Xing Huang
Keyword(s):  
Communication System ◽  
Secure Communication ◽  
System Level ◽  
Short Message ◽  
Security Vulnerabilities ◽  
Message Communication ◽  
Gsm Network ◽  
End To End

Because of the security vulnerabilities of the GSM network short message communication faces threat of information theft, this paper propose an end-to-end secure communication solution, then elaborate the security of the scheme, introduce the features and system-level architecture. And implement system based on the Iphone4 platform.

scholarly journals Rain fade slope model for terrestrial microwave links

2020 ◽  
Vol 12 (5) ◽  
pp. 372-379 ◽  
Author(s):  
Jalel Chebil ◽  
Md. Rafiqul Islam ◽  
Al-Hareth Zyoud ◽  
Mohamed Hadi Habaebi ◽  
Hassan Dao
Keyword(s):  
Standard Deviation ◽  
Communication System ◽  
Goodness Of Fit ◽  
Rain Attenuation ◽  
Goodness Of Fit Test ◽  
Chi Square ◽  
Tropical Regions ◽  
Satellite Link ◽  
Satellite Links ◽  
Point To Point

AbstractThe dynamic characteristic of rain fade slope is one important factor in determining the availability of a communication system, and it is very useful in the design of fade countermeasures. In the literature, many models were proposed for rain fade slope for earth-to-satellite links. However, there are no models available for rain fade point to point terrestrial microwave links. This paper proposes a new model for the estimation of rain fade slope statistics for terrestrial microwave links in tropical regions. First, the ITU-R model for rain fade slope for earth-to-satellite link was compared with the corresponding statistics obtained from rain attenuation data measured from three terrestrial links in Malaysia. It is found that the expression of its distribution and its standard deviation should be modified. This leads to the derivation of the proposed rain fade slope model based on the statistics of one link. Then, it is tested using the remaining data and its results were very close to the measured statistics for all attenuation levels higher than 1 dB. Moreover, the model was validated using the chi-square goodness-of-fit test.

AAC Decision-Making and Mobile Technology: Points to Ponder

2014 ◽  
Vol 23 (2) ◽  
pp. 104-111 ◽  
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.

A Community Based High Risk Register for Hearing Loss

1982 ◽  
Vol 47 (4) ◽  
pp. 373-375 ◽  
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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