A very rough rule of thumb is that, under favorable conditions, you'll need 15 BTU's of cooling for every square foot of your house.

In most species, all dermal denticles are oriented in one direction, making the skin feel very smooth if rubbed in one direction and very rough if rubbed in the other.

Some passages can be very rough during the winter.

As a halite crystal is growing, new atoms can very easily attach to the parts of the surface with rough atomic-scale structure and many dangling bonds.

One of these, Itō's lemma, expresses the composite of an Itō process ( or more generally a semimartingale ) dX < sub > t </ sub > with a twice-differentiable function f. In Itō's lemma, the derivative of the composite function depends not only on dX < sub > t </ sub > and the derivative of f but also on the second derivative of f. The dependence on the second derivative is a consequence of the non-zero quadratic variation of the stochastic process, which broadly speaking means that the process can move up and down in a very rough way.

Many renderings have a very rough estimate of radiosity, simply illuminating an entire scene very slightly with a factor known as ambiance.

Beyond that to the rear of the Rotunda is a very rough hewn chapel, containing an opening to a rock-cut chamber, from which several kokh-tombs radiate.

Despite its isolated location the Great Victoria is bisected by very rough tracks including the Connie Sue Highway and the Anne Beadell Highway.

Before Jack and I moved to Montreal, we had just been through some very rough treatment in the racially biased South during spring training in Florida.

This is a very rough guide, and not a substitute for an individual diver's known susceptibility, or for standard diving safety guides.

While for piecewise smooth surfaces there is a unique natural notion of surface area, if a surface is very irregular, or rough, then it may not be possible to assign any area at all to it.

In the figure I < sub > 1 </ sub > has been set to unity, a very rough approximation.

A rough evolutionary lineage can be traced from Eocene and Oligocene species: Anthracotherium and Elomeryx to the Miocene Merycopotamus and Libycosaurus and the very latest anthracotheres in the Pliocene.

This can be used as a very rough first-order approximation for SHF ( microwave ) communication links ;

While engraved lines are very smooth and hard-edged, drypoint scratching leaves a rough burr at the edges of each line.

Apart from the bad and very cold weather, the dense forest and rough terrain also prevented proper use of the Allied air superiority which had great difficulties in spotting any targets.

The Roman section still exists and is lined with monuments of all periods, although the cement has eroded out of the joints, leaving a very rough surface.

This journey typically took two to three weeks and was noted for its very rough lava terrain and extremely dry climate, which tended to dry the wooden wheels on the wagons, causing the iron rims to fall off the wheels.

The wagons had no springs, and the ride along the trail was very rough.

The shape of these fishes is usually oblong, compressed, neither very deep nor much elongated, their scales are generally harsh and rough to the feel, or ciliate, and their colors are brilliant ( red, brown, orange and yellow are the most predominant tints ).

In some species in this category, for example E. youngiana and E. viminalis, the rough basal bark is very ribbony at the top, where it gives way to the smooth upper stems.

When the framework was removed, the new wall was very strong with a rough surface of bricks or stones.

The tongues of these species have a very rough texture which allows them to remove oils and parasites.

They are very prevalent in the Japanese media and operate internationally with an estimated 80, 900 members in 2009, the last year for which an estimate is available.

The number of murders and assaults perpetrated upon Negroes is very great ; we can form only an approximative estimate of what is going on in those parts of the South which are not closely garrisoned, and from which no regular reports are received, by what occurs under the very eyes of our military authorities.

Too large or too small a jumping size will lead to a slow-mixing Markov chain, i. e. a highly correlated set of samples, so that a very large number of samples will be needed to get a reasonable estimate of any desired property of the distribution.

It is very difficult to estimate the shear, ductile and tensile strengths within the snowpack or relative to the ground below.

West Baton Rouge saw a very small percentage of growth after Hurricane Katrina with the latest estimate ( July 2006 ) put about 864 extra residents into the parish.

In general, the output tree of a phylogenetic analysis is an estimate of the characters phylogeny ( i. e. a gene tree ) and not the phylogeny of the taxa ( i. e. species tree ) from which these characters were sampled, though ideally, both should be very close.

It should be borne in mind that NZM had a very small circulation — no more, in JM Fischer ’ s estimate, than 1500-2000 readers.

A recent age estimate for TW PsA ( 400 +- 70 million years ), agrees very well with the isochronal age for Fomalhaut ( 450 +- 40 million years ), further arguing for the two stars forming a physical binary.

This heuristic estimate is very reliable in practice.

His estimate was 1228 W / m < sup > 2 </ sup >, very close to the current estimate of 1367 W / m < sup > 2 </ sup >.

The worldwide average age of menarche is very difficult to estimate accurately, and it varies significantly by geographical region, race, ethnicity and other characteristics.

They burn very predictably, and with some practice a builder can estimate how long they will last.

For many of the mummified pharaohs, it has been very difficult to determine when they were born, and historians can only estimate a time when they reigned over Egypt.

This estimate was however criticised by M. J. O ’ Kelly and his archaeological team, who believed that it would have taken thirty years to build at the very least.

More recent longevity claims are subcategorized by many editions of Guinness World Records into four groups: " In late life, very old people often tend to advance their ages at the rate of about 17 years per decade .... Several celebrated super-centenarians ( over 110 years ) are believed to have been double lives ( father and son, relations with the same names or successive bearers of a title ) .... A number of instances have been commercially sponsored, while a fourth category of recent claims are those made for political ends ...." The estimate of 17 years per decade was corroborated by the 1901 and 1911 British censuses.

No other data set comes close to providing this estimate of original forest composition and structure, and the data have accordingly been used very heavily.

* The Universe Within 14 Billion Light Years — NASA Atlas of the Universe ( note — this map only gives a rough cosmographical estimate of the expected distribution of superclusters within the observable universe ; very little actual mapping has been done beyond a distance of one billion light years ):

This is a very rough estimate ; the actual number of thalassemia major patients is unknown due to the prevalence of thalassemia in less developed countries.

For those interested in the mathematics, the following is a very approximate order-of-magnitude estimate of the likelihood of alignments, assuming a plane covered with uniformly distributed " significant " points.

The pessimistic conclusions at which he arrived provoked criticism both in Britain and America, which was renewed when he published in a new edition ( 1899 ) an elaborate and very deprecatory estimate of Gladstone, then recently dead.