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IEEE published the 802.11ac standard in 2013. This book summarizes
and explains the specification of this new Wi-Fi standard by IEEE.
This specification is extremely complex to understand and the
learning curve is steep. This book tries to alleviate difficulties
and be useful for people who will study or may even develop
software for 802.11ac devices. It is not about a specific chipset
or device. The content discusses in details the MAC and PHY layers.
There is a special attention to channel aggregation, MIMO, MU-MIMO,
beam-forming as well as how Linux integrates 802.11ac drivers in
the kernel. Nevertheless it tries to be easy to read when possible
and it gives much contextual information. Jean-Pierre had first
hand access to 802.11ac information as one of Orange's delegates to
IEEE.
P. Duval was a missionary White Father in the Democratic Republic
of Congo and Mexico, he is the author of more than thirty books.
This book is a reflection on the evolution of the Catholic Church
over the past 200 years, its successes but also failures. Pope
Benedict XVI intends to solemnize the fiftieth anniversary of the
Second Vatican Council, it will be the Year of Faith. Christians
rejoice and expect fruitful outcomes, at a time which do not lack
signs of a backward and neither of challenges. Diocesan and parish
authorities are indeed now in the hands of men -still nothing more
that men- who have not known the Church before the Council: how
then could they appreciate what it brought, without having suffered
from what has preceded it? The author is optimistic, even if you
feel the disappointment of an elderly man who, like those of his
generation, was never consulted on anything in an institution
incorrigibly pyramidal; clearly indicating what seems to be warning
signs, he hopes the Year of Faith will blow a new fresh breeze in a
church where there are so many corners where to remove dust. This
book strickes by the author's erudition and its knowledge
experienced from the inside a church that is still looking 2000
years after Christ's teaching.
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