Cyclones are a key element of the atmospheric circulation in
the midlatitudes (Carlson, 1998). Cyclogenesis, for which a
ﬁrst conceptual model was presented by the Bergen school
(Bjerknes, 1910), occurs most frequently at the polar front.
The various ascending and descending airstreams typically
associated with these cyclones carry a range of different
chemical signatures (Cooper et al., 2002). The so-called
warm conveyor belt (WCB) – a strongly ascending airstream
ahead of a cyclone’s cold front (Browning et al.
Public authorities are major consumers in Europe,
spending some 16 % of the EU’s gross domestic
product (which is a sum equivalent to half the
GDP of Germany). By using their purchasing
power to opt for goods and services that also
respect the environment, they can make an
important contribution towards sustainable
Permanent grass cover crop is a technique used in the
vineyards of Villa Bel-Air. As a result, the grass absorbs
the water and the nutrients from the top layer of the soil,
and forces the vine roots to go deeper and deeper to find
Throughout the year, de-budding, leaf-thinning and
crop thinning are performed by the technical team. All
of these manual operations ensure the perfect health
and maturity of each bunch. The harvested grapes are
then transferred onto a modern sorting table to remove
all remaining vegetal matter.
To stress the salience and urgency of the national situation
as dictated by contemporary terrorism and to
underscore the need for behavioral and social science
understandings of that situation are to pronounce the
self-evident. Terrorism, already recognized by some as the
looming form of international conflict in the late twentieth century,
moved dramatically to center stage on September 11, 2001,
and promises to occupy national attention for decades.
The Office of Force Transformation (OFT) and the Office of the Assistant Secretary of Defense for Networks and Information Integration (OASD [NII]) have developed a conceptual framework for conducting analyses and enhancing understanding of network-centric operations (NCO) capabilities. RAND is one of the supporting organizations that assiste
Computers are one of the most important tools in any field of science and
especially in physics. A student in an undergraduate lab will appreciate the
help of a computer in calculating a result from a series of measurements.
The more advanced researcher will use them for tasks like simulating an
experiment, or solving complex systems of equations. Physics is deeply
connected to mathematics and requires a lot of calculational skills. If one is
only interested in a conceptual understanding of the field, or an estimate of
the outcome of an experiment, simple calculus will probably suffice.