Although in some respects more technical in their subjects and style than Darwin's "Journal," the books here reprinted will never lose their value and interest for the originality of the observations they contain. Many parts of them are admirably adapted for giving an insight into problems regarding the structure and changes of the earth's surface, and in fact they form a charming introduction to physical geology and physiography in their application to special domains.
Tham khảo sách 'transactions on neural networks, vol. 12 neural network based_adaptive controller design of robotic manipulators with an observer', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả
The very latest research is uncovering a stream of evidence revealing evolution in action - from the actual observation of a species splitting into two, to new fossil discoveries, to the deciphering of the evidence stored in our genome. Why Evolution is True weaves together the many threads of modern work in genetics, palaeontology,geology, molecular biology, anatomy, and development to demonstrate the 'indelible stamp' of the processes first proposed by Darwin. It is a crisp, lucid, and accessible statement that will leave no one with an open mind in any doubt about the truth of evolution....
"The best mode of exciting the love of observation is by teaching 'How to Observe.' With this end it was
originally intended to produce, in one or two volumes, a series of hints for travellers and students, calling their
attention to the points necessary for inquiry or observation in the different branches of Geology, Natural
History, Agriculture, the Fine Arts, General Statistics, and Social Manners.
Humankind’s fascination with Mars predates
recorded history. The bright planet with the reddish tint
is unique among the other celestial objects. Tycho
Brahe’s observations of its unpredictable motion were
deciphered by Johannes Kepler in the early 17th century
as he developed his laws of planetary motion.
Galileo trained his telescope on Mars and saw it as a
disk in 1610. Later in the 1600s, Christiaan Huygens
and Gian Cassini drew the first maps of the Martian
Cold seeps occur in geologically active and passive continental margins, where pore
waters enriched in methane are forced upward through the sediments by pressure gradients. The
advective supply of methane leads to dense microbial communities with high metabolic rates.
Anaerobic methane oxidation presumably coupled to sulphate reduction facilitates formation of
carbonates and, in many places, generates extremely high concentrations of hydrogen sulphide in
The distinction between geophysics and astronomy was once clear. Events
on Earth constituted the realm of geophysics, while astronomy encompassed
objects that are located many light years from the Sun and Earth. Interstellar
clouds were “out there”, where they could be observed from isolated observatories
nestled under the starry skies of the world’s deserts. Geology relied
on shovels and drill bits to obtain samples of mud and ice that contained clues
to the paleoclimate.
In many small and shallow aquifers the hydrochemistry does not evolve further. However, the
baseline natural quality of groundwater may vary spatially within the same aquifer if the
mineral assemblages vary, and also evolves with time as the water moves along groundwater
flow lines. If an aquifer dips below a confining layer (Figure 2.5), a sequence of
hydrochemical processes occurs with progressive distance down gradient away from the
outcrop, including precipitation of some solids when relevant ion concentrations reach
saturation levels for a solid mineral phase.
The writer, having resided in the village of Niagara Falls for more than a third of a century, has had
opportunity to become thoroughly acquainted with the locality, and to study it with constantly increasing
interest and admiration.