Laws relating to interstate and foreign commerce ... /

Mode of access: Internet.

Communications satellites : challenges of the future.

Mode of access: Internet.

New telecommunications services : let's not stack the deck againist them.

"March 1988"-- P. [4].

Telecommunications as an engine of economic growth.

Shipping list no.: 89-349-P.

Principles of coding, filtering, and information theory.

Includes bibliography.

OT technical memorandum

Mode of access: Internet.

Statistical theory of communication.

Mode of access: Internet.

Sequential decoding,

Includes bibliography.

Future information technology--1984, telecommunications /

"Issued December 1984."

Federal Communications Commission reports : decisions, reports, and orders of the Federal Communications Commission of the United States /

Title varies slightly.

Telecommunications equipment /

"October 1994."

FCC record : a comprehensive compilation of decisions, reports, public notices and other documents of the Federal Communications Commission of the United States.

Title from cover.

Analytical analysis of consumption in Brazil

This thesis is an analytical analysis of consumption in Brazil, based on data from the Consumer Expenditure Survey, years 2008 to 2009, collected by the Brazilian Institute of Geography and Statistics. The main aim of the thesis was to identify differences and similarities in consumption among Brazilian households, and estimate the importance of demographic and geographic characteristics. Initially, households belonging to different social classes and geographical regions were compared based on their consumption. For further insights, two cluster analyses were conducted. Firstly, households were grouped according to the absolute values of expenditures. Five clusters were discovered; cluster membership showed larger spending in all of the expense categories for households having higher income, and a substantial association with particular demographic variables, including as region, neighborhood, race and education. Secondly, cluster analysis was performed on proportionate distribution of total spending by every household. Five groups of households were revealed: Basic Consumers, the largest group that spends only on fundamental goods, Limited Spenders, which additionally purchase alcohol, tobacco, literature and telecommunication technologies, Mainstream Buyers, characterized by spending on clothing, personal care, entertainment and transport, Advanced Consumers, which have high relative expenses on financial and legal services, healthcare and education, and Exclusive Spenders, households distinguished by spending on vehicles, real estate and travelling.

No-switching quantum key distribution using broadband modulated coherent light

We realize an end-to-end no-switching quantum key distribution protocol using continuous-wave coherent light. We encode weak broadband Gaussian modulations onto the amplitude and phase quadratures of light beams. Our no-switching protocol achieves high secret key rate via a post-selection protocol that utilizes both quadrature information simultaneously. We establish a secret key rate of 25 Mbits/s for a lossless channel and 1 kbit/s for 90% channel loss, per 17 MHz of detected bandwidth, assuming individual Gaussian eavesdropping attacks. Since our scheme is truly broadband, it can potentially deliver orders of magnitude higher key rates by extending the encoding bandwidth with higher-end telecommunication technology.