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They could enhance the built environment in a number of ways.
Types of green roof and their characteristics Characteristics Extensive Green Roof Semi-intensive Green Roof Intensive Green Roof Soil characteristics - Depth - Grain size - Water retention capacity - Nutrient reserves 150 mm or less Coarse Low Low 150 to 200 mm Medium Medium Medium 200 to 2000 mm Fine High High Fully saturated weight Light (80-150 kg/m2) Medium (150-300 kg/m2) Heavy (300-1000 kg/m2) Plant species Moss-sedum-herbs and grasses Grass-herbs and shrubs Lawn or perennials, shrubs and trees Accessibility by occupants Mostly inaccessible Partially accessible Accessible Cost Low capital and maintenance costs Medium capital and maintenance costs High capital and maintenance costs Structure and Materials of Green Roof The basic components in common of green roofs of any type are illustrated in Fig. 1 and are explicated below.
Amongst various places visited by the delegation, a number of buildings in Tokyo showcased exemplars of green roofs.

All profiles (AR=0.571) are tested in a wind tunnel at air speed of 10 m/s at Reynolds number 6.5 x 105.
These four airfoil shapes will be studied at Reynolds number Re = 6.5x105 across a range of -4.5° < α < 20°.
The specimens were eroded by sand grains of the dune (from the same semi-arid step area and the average diameter of which is 80 µm).
Strömberg, An Optimal Number-Dependent Preventive Maintenance Strategy for Offshore Wind Turbine Blades Considering Logistics, Advances in Operations Research Volume, 2013

And this system could directly be used for data storage module in grain yield measurement system if it modified.
So it is easy to change rotate speed only by changing the number of pulses of stepper motor output.
Therefore, fertilization shaft rotate speed calculation formula is: (4) Where, n is the fertilizer shaft rotate speed (rpm); m is the number of pulses (pulses/s); s is micro-stepping numbers; x is the reducer transmission ratio.
When the fertilizer needs of farmland districts are determined, the number of the outputted farm machinery moving speed adjustment pulse supplied by speed sensor accommodates the fertilization rate.
Experiment Process and Results Inputed field number 0 and needed fertilization rate (N: 30g, P: 20g; K: 15g) to control system input interface by the matrix keyboard (Fig.2).

A number of biodegradable aliphatic polyesters have been developed and some of them are now commercially available because of their good biodegradability.
The probable reason was that a large portion of noncrystallizable units (MD) might be trapped in the crystal lattice as an impurity; when the content of the noncrystallizable units was increased, the crystallizable link of the chains became shorter, and thus the perfect spherulites changed to grain.

A number of laboratory studies have indicated that Ni-based alloy have significant potential in wear critical applications[6-7].
The difference between the hardness of the two alloys could be due to the fact that hard phases and smaller grains of the alloy with the addition of rare earth.

Dewatering of the tailings to produce “dry tailings” for stacking is now being used as an alternative by a number of companies [1], and has already gained well economic and social benefits not only in the gold leaching tailings [2], but also in the other types of tailings such as coal, iron, copper, aluminum and phosphate mines [3,4,5].
Since the pressure filter accepts a wide range of particle size, concentration and viscosity, it is an essential and flexible equipment to treat the fine grains in the tailings.

Figure 4 shows a dark-field TEM image taken from a C15 grain.
For Laves phase, on the other hand, the ideal ratio of the constituent atom radii for the closest packing is 1.225 [15], and the enthalpies of formation for a number of Laves phases show the maximum at the ideal ratio [16], suggesting the Fig. 3 SEM micrographs of an Ir-20Pt-15.5Y annealed at 2073 K for 72 h.

As we all know, the size of grain could effect the formation of crystal.
Acknowledgements This work is supported by Shanghai Leading Academic Discipline Project (Project Number: J51504) and Foundation of Shanghai Institute of Technology (No.YJ2011-30).

In the direct contact test, the material to be tested or its extraction contacts directly with culturing cells, after a period of time, the numbers, morphology, metabolism or function of the culturing cells were evaluated.
Many approaches have been introduced to control the pore size of a porous ceramic, such as the selection of raw materials, control of grain distribution, addition of additives that form opening space in ceramic and so on.

For many glasses and amorphous materials, α is given by[9]: α(ω) =B ( ℏ ω- Eopt)n / ℏ ω (3) where the constant B is a measure of the disorder of the material, Eopt is the optical energy gap and n is a number which characterizes the optical absorption process.
As the Fe content Fv increases in the examined composition, the surface area at the interface between the granular grains and matrix materials increases.