Quartering winds

Quartering winds, in contrast with winds perpendicular to the building facades, increased strains on some of the chevrons by 40 percent over the design calculations. 

The net aerodynamic force exerted on a body is illustrated in Figure 2 by the arrow labeled R. The direction and speed of the airflow ahead of the body is denoted by V, called the relative wind. The body is inclined to V . by the angle of attack, a. The resultant aerodynamic force R can be resolved into two components lift, L, perpendicular to V. and drag, D, parallel to V,. In Figure 2, R is shown acting through a point one-quarter of the body length from the nose, the quarter-chord point. Beacuse the aerodynamic... 

Diffusion was veiy slow. The earliest clear Chinese reference to a windmill occurs only in 1219. The Chinese adopted the horizontal rotor used in Central Asia, but equipped it with pivoted blades, like Venetian blinds. These windmills did not require shielding walls like Central Asian mills, and could tap wind from any quarter. 

Primary separation facilities process the produced fluids and gases into individual streams of gas, oil and water. These facilities are commonly referred to as Gas Oil Separation Plants (GOSP s), Central Processing Facilities (CPF) or if located offshore on drilling, production and quarters platforms (PDQ s). The offshore platform may either float on the sea or be supported on steel or concrete supports secured to the ocean floor, where it is capable of resisting waves, wind, and in Arctic regions ice flows. In some instances surplus oil tankers have been converted into offshore production and storage facilities. 

The trail was of washed, white sand, inches deep in places and soft and inviting. We had walked hardly a quarter of a mile when lust overtook our interest in lepidoptera. Adding to our thrill was the risk of discovery by Witoto trail users. We tossed caution to the winds and were soon lost in each other. Pleasant it was in that verdant setting to part and defile the shaggy, slippery riches of Ev s sex. I thought of it as "Doing it for Vladimir." Verdant lust and butterflies were always entwined in Nabokov s enviable mind. 

The scent of flowers does not go against the wind, not sandal, rosebay or jasmine, but the scent of the good goes against the wind a good man is wafted to all quarters. 

While solid flares are smoky and therefore subject to wind and other weather conditions, the pyrotechnic system is relatively free of particulare matter and can be made directional. In testing, directional light efficiencies have been increased 12 times by using an aluminum reflector to produce efficiencies of one-quarter to one-half... 

Past experience shows that as the equipment needed for new technologies starts to be mass produced, its prices drop. The cost of wind power-generated electricity has already been reduced to one quarter of that of the first installations. An ultrathin-film solar collector manufacturer (Nanosolar) claims that it will soon market collectors at costs that are severalfold less expensive than today s PV prices. We do not know if that particular claim is correct or not, but we know that time is on our side. Therefore, it is realistic to expect that as markets expand, the costs of mass-produced renewable energy devices will also drop and the cost of transition to a solar-hydrogen economy over several decades will become not only affordable, but will also create jobs and an economic boom. We should remember that drastic changes can occur rapidly after all, a century ago electricity was a luxury that only 3% of the households had. The same will occur with renewable energy over the 21st century. 

The power plant construction cost index (PCCI) tracks the costs of building coal, gas, wind, and nuclear power plants, indexed to the year 2000 — registered 231 index points in the third quarter of 2007 ending in October — indicating that a power plant that in 2000 cost 1 billion in 2007 would have cost 2.31 billion. 

Shaw and Paur performed FA of all elements observed by XRF in all samples collected at the center site. The data from each quarter were analyzed separately and data for fine and coarse particles were included in the same FAs. For consistency, four factors were used for each quarter. The nature of the factors obtained varied somewhat from quarter to quarter, but three factors emerged consistently (1) fine fraction S and Se, corresponding to our Factor 3 (2) coarse fraction crustal elements, the coarse counterpart of our Factor 2 and (3) fine fraction metals (Fe, Zn, Mn), for which there is no direct analog among the FA of all samples in this work. However, we also performed FA of the samples analyzed from each station. For the center station, Factor 1 was heavily loaded with As, Mn, Sb, Zn, Pb, Br, with smaller loadings of Fe and Se, and the wind trajectories were from more northerly and easterly directions than the average for all samples. Note that a number of the elements on this factor are observable by INAA, but... 

Le Guin, Ursula K. The Wind s Twelve Quarters. Harper Row, New York. 1975. 

On the whole it is better to resort to safer methods of heating. The simplest procedure is to employ a small water bath. This may consist of a 250 ml Pyrex beaker, three-quarters filled with water and covered with a lead or galvanized iron plate (Fig. 11.22) drilled with two holes to accommodate a test-tube and a centrifuge tube. It is a good plan to wind a thin rubber band... 

Some noteworthy similarities exist between wind energy systems and CPV systems.9 They both employ relatively common materials, particularly steel. Wind system costs are typically less than 1 per watt they depend mainly on the cost of steel, whereas flat-plate PV is linked to the availability and cost of expensive semiconductor silicon. But solar concentrator structures are also amenable to an auto-assembly type of production (see Fig. 5), and CPV developers estimate CPV production facility costs are much closer to those of wind systems than to those of flat-plate PV production facilities. In early EPRI cost studies, CPV production facility costs were estimated (on the same costing basis as the crystalline and amorphous silicon facilities) to be about 28 million for a 100 MW per year installation—about one-quarter the cost of the conventional silicon PV facilities.10 These lower investment costs can lead to a faster scale-up of manufacturing facilities because investor risk is relatively smaller than the risks entailed in investing in conventional PV production facilities. 

Coceal, O., and Belcher, S.E. (2004) A canopy model of mean winds through urban areas. Quarterly Journal of the Royal Meteorological Society, 130, 1349-1372. 

Smith, S. D., Banke, E. G., 1975. Variation of sea surface drag coefficient with wind speed. Quarterly Journal of Royal Meteorological Society, 101, 665-673. 

Last Quarter Moon A semicircle with the flat side facing west (on the right) and the curved side facing east. Rises at midnight. High in the sky before dawn. Finish up wind down reflect retreat. 

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