Montessori sensorial materials

Introduction We cannot compare anything to breathing clean and fresh air. But today, are we breathing clean air? The gases you're taking up by our noise could be slowly killing us. World Health Organization says in their report, in every year about two million people die too early due to the effects of polluted air. Air pollution is a large problem and it is not a problem of people only, the problem of the world also, through such things as global warming and damage to the ozone layer, it has…

These are similar to mineral component that present in bones and hard tissues (Ilie et al., 2016). The combination of ceramic based materials - hydroxyapatite and natural polymer as sodium alginate will provide strength, stiffness and fracture toughness to bone (S. Lala et al., 2016). The composite materials have been used in load bearing application such as filler and bone defect. Alginate (Alg) is a natural polymer which synthesized from brown algae. Alginate is more…

these sides of the cube have near vertical cracks at the cube center. Figure (4.3): Failure pattern of cubes specimens (C1). 4.2.3. Static Modulus of Elasticity: Modulus of elasticity is a necessary parameter to determine the stresses in materials and structures. Even though concrete has nonlinear stress-strain behavior,…

1.1 What is a composite material? Composite materials are materials in which a homogenous matrix is reinforced by a stronger and stiffer constituent that is usually fibrous but may have a particulate or other shape (web.mit.edu). They are produced when two or more materials or phases are used together to give a combination of properties that cannot be attained otherwise. For example steel reinforced concrete, plywood and fibre glass. 1.2 What is a Ceramic Matrix Composite (CMC)? CMCs are a…

2.9 Material Properties 2.9.1 Hardness Test Hardness is defined as a measure of a material’s resistance to contained plastic deformation (e.g., a small dent or scratch). Hardness testing comprises a small indenter being enforced into the surface of the material being confirmed under organized circumstances of load and rate of application. The depth or size of the resulting indentation is measured, which in turn is linked to a hardness number; weaker the material, indentation will be the…

temperatures. Stretch forming is a method that combines controlled tension and bending of sheet material around dies to produce accurately contoured parts. It is extensively used in the aerospace industry to form large sheet panels of mild curvature, e.g. the leading edge of a wing. A commonly used material for aircraft skins is the heat-treatable aluminum alloy AA 2024. Possible failure modes during forming of this material are necking, wrinkling, $L\ddot{u}$ders lines or orange peel. In order…

Result 4.1 Experimental Analysis The experimental work is carried out to evaluate the shear strength of steel fiber reinforced concrete deep beams without stirrups. For this 18 beams are cast. The beams are tested under two-point loading as per IS after 28 days curing. Fiber fraction is varied as 0%, 1.5% and 3%. The shear span-to-depth ratio (a/d ratio) for beams is kept as 0.60 for case-I and 0.74 for case-II. The cube compressive strength is estimated. The experimental results are…

According to cerakoteguncoatings.com (2017), Cerakote is a Polymer-Ceramic coating that can be applied to metals, plastics, polymers and wood. Cerakote is used on; knives, weapons, tools, some electronic covers, glasses and anything durable that needs a tough coating. This ceramic thin-film coating is intended to offer an appealing finish with unequaled performance. The ceramic coating of Cerakote provides the advantage of having extraordinary; adhesiveness, pliability, corrosion and wear…

Callaway Steelhead XR Irons: There are motor-heads. There are rock-heads. And then, there is steelhead. Steelhead XR irons are the latest offering from Callaway. Allow starting the section by qualifying the aforementioned statement. The steelheads irons are the foremost flagship offering of the Callaway. Golf aficionados’ would agree that golfing, steelhead and Callaway are almost synonymous. In the past, Callaway offered many series in the flagship starting from X-14 through X-22. However, the…

snow Goggles and All terrain goggles, Food container’s insulation and gaskets etc. Material performs well to the qualitative requirement of troops and is equally good for hot summer in desert as well as in extreme cold up to -50oC in glacier regions. Certain properties of the…