the design of everyday things by don norman
The design of mat foundations
... 119 pcf Example 4. Design the steel lying in the East-West direction of the mat shown below with external dimensions of 42 feet by 74 feet. The columns are all 15 by 15”, the LF = 1.6, fc’ ... 0.00018y. Values are solved by plugging in the x and y values, which these values are found by using the x-y coordinate system off the mat foundation. Determine the average soil reaction. ... years, the dredged material from nearby waterways and excavated soil from a neighboring project sat on the mill site. The material acted as a surcharge which compacted the soil to the point of...
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Tài liệu The message of a master - By John McDonald pdf
... as the beasts of the field, the birds of the air and the fish of the sea are bountifully supplied. For any man, no matter what his station in life, to take the stand that it is the destiny of ... keeps the airplane soaring. Without resistance, it could not fly. Neither could the birds; or the fish swim; or you walk. As the power of the engine increases, the greater the momentum of the ... following pages are the result of a series of notes collected and set down in the form of a story and a system of practice, which accounts for the style of arrangement. The sequential order...
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Tài liệu The Design of Rolling Bearing Mountings P2 ppt
... accuracy of the workpiece mainly dependon the axial rigidity of the spindle headstock and of the rotary table. Therefore, the rigidity of the thrust bear-ings is especially important. To increase the ... the expansion of the rotating partsdue to the effects of heat and centrifugal force do notcause jamming of the outer rings in the housing.Lubrication, sealing The bearings are lubricated by ... on the roll-ing bearing aspects of the applications. The operation of the machine allows conclusions to be drawn about the operating conditions which dictate the bearingtype and design, the...
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Tài liệu The Design of Rolling Bearing Mountings P1 pptx
... lubrication. The labyrinth seal at the work end consists of ready-to-mount, non-rubbing sealing elements. The inner laby-rinth ring retains the lubricating oil, the outer laby-rinth ring prevents the ... kN; the bearings are vertically arranged.Bearing selection The axial load of 130 kN is made up of the weight of the rotor and the two variable top and bottom fan im-pellers as well as the thrust ... clearanceDue to the tight fits, the inner ring of the bearing is expanded and the outer ring with the roller-and-cageassembly is contracted. Thus the radial clearance of the bearing is reduced...
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Science of everyday things vol 2 physics
... to the shoulder of the person who has firedit—corresponding to the momentum of the bul-let. Why, then, does the “kick” not knock a per-son’s shoulder off the way a bullet would? Because the ... ConservationLawsThen, as the ball hits the ground, the energyis dispersed. Most of it goes into the ground, anddepending on the rigidity of the ball and the ground, this energy may cause the ball ... make the situationmore plausible, the “Man of Steel” should havebeen shown catching the person, then slowly fol-lowing through on the trajectory of the falltoward earth. THE CRACK OF THE BAT:INCREASING...
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Tài liệu The Design Of Manufacturing Systems P2 docx
... Typically, the designer designs a product with minimal knowledge about the capabilities and limitations of the manufacturing technology. The designer then tries to find out if the design can be ... ways of simplifying CSG models for their potential use in feature recognition.ã Restrict the domain of the model by restricting the range of primitives and/or of the orientationsthat they may ... beforehand, then the best configuration of the spindles for the parallel machine tool can be deduced. The best configuration of the spindles couldbe based on the types and number of features present on the...
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Tài liệu The Design Of Manufacturing Systems P1 pptx
... limited. The case of shut down of an existing plant results when the variable Wit takes a value of zero after agiven time period t. The economics of shut down can be modeled by the inclusion of the ... for the production of each chemical. We might then contemplate the in-house production of some of the required ingredients, forcing us to consider another tier of ingredients and by- products. The ... assumed that the production rate (rijt) of the main product j of each such scheme is proportional to the capacity of the plant.where Mi denotes the index set of main products of the alternative...
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Tài liệu The Science of Being Well - By Wallace D.Wattles doc
... fills the interspaces of the universe. This Sub-stance is the Life of All, and is seeking to express more life in all. It is the Prin-ciple of Life of the universe, and the Principle of Health ... life is the Principle of Life of the universe. This Substance has created from itself all the forms of or-ganic life by thinking them, or by thinking the motions and functions whichproduce them.Original ... control his attention by the use of his will.He can decide what things he will think about. www.scienceofbeingwell.net The Science of Being Well 24visible by the transformation of the physical body...
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Tài liệu The Design of Rolling Bearing Mountings P1 docx
... selection The axial load of 130 kN is made up of the weight of the rotor and the two variable top and bottom fan im-pellers as well as the thrust of these fan impellers. Theyare supported by the ... the expansion of the rotating partsdue to the effects of heat and centrifugal force do notcause jamming of the outer rings in the housing.Lubrication, sealing The bearings are lubricated by ... adjustment is, therefore, not required.Machining of the housing bore is simplified in that the nominal outside diameters of the radial and thrustbearings are the same. The O.D. tolerance of the angu-lar...
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Tài liệu The Design of Rolling Bearing Mountings P2 pdf
... loads in the rolling gap. In order to stillachieve the thickness tolerances of the sheets in the mi-crometer range, the deflection is compensated for by inclining of rolls 1 and 3 and by counterbending ... roughening of the surfaces(increased running noise).Bearing dimensioning The size of the bearings is dictated by the shaft diame-ter, which in turn is based on the anticipated vibra-tions. The bearing ... bearing aspects of the applications. The operation of the machine allows conclusions to be drawn about the operating conditions which dictate the bearingtype and design, the size and arrangement,...
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Tài liệu The Theory of the Design of Experiments doc
... affected by competition among individuals. The lack of a unified “theory of ecology” and the existence instead of a fragmentedbody of “ecological theory”is evidenced by the relative use of these ... alternative to the “theory of evolution”for explaining the diversity of life on Earth and the ex-istence of millions of different species.Opponents of this view hold that ID isnot a scientific theory ... understanding of the term “scientific theory,”it is anachro-nistic to use the phrase “theory of evo-lution.”What constitutes a self-containedscientific theory is a subject of muchphilosophical...
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Tài liệu The Design Of Manufacturing Systems P2 pptx
... to capture the design intent for its use in managing the propagation of design changes.Based on the discussion so far it is clear that neither the design by features approach nor the automaticfeature ... beforehand, then the best configuration of the spindles for the parallel machine tool can be deduced. The best configuration of the spindles couldbe based on the types and number of features present on the ... ways of simplifying CSG models for their potential use in feature recognition.ã Restrict the domain of the model by restricting the range of primitives and/or of the orientationsthat they may...
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Tài liệu The Design Of Manufacturing Systems P1 docx
... limited. The case of shut down of an existing plant results when the variable Wit takes a value of zero after agiven time period t. The economics of shut down can be modeled by the inclusion of the ... Instead of restricting the dispersion of the solutionvectors, the approach to restrict the dispersion of the random recourse costs can also be considered.Because the variability of the recourse ... ,…, are the extreme rays of C, then the projection of P onto the space of x is given by: projx(P) ϭ {x : Ax Յb, h ϭ 1,…,H; x ʦ X}. This expression requires finding the extreme rays of the polyhedral...
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Tài liệu The Science of Getting Rich - By Wallace D.Wattles docx
... suggestyou start by reading the Preface and all seventeen chapters of The Science of Getting Rich ebook in the order in which they are presented. The purpose of reading through the Preface and ... ThinkingSubstance takes the form of its thought, and moves according to the thought. Holding the idea of a circling system of suns and worlds, ittakes the form of these bodies, and moves them as it thinks. ... which we live; we live for the body, we livefor the mind, we live for the soul. No one of these is better or holier than the other; all are alike desirable, and no one of the three - body, mind,...
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Tài liệu The State of Computer Security BY Marcus J. Ranum CSO Tenable Network Security, Inc. doc
... Bob the router guy! When youre done with turning on the VOIP in the router, turn on the IPS security features too!” Conclusionã Our moment in the sun is coming to a closeã 5 years of play ... and the costs are borne by the wealthy corporations”(security’s now and forevermore a regressive tax, kiss any ROI story goodbye!)ã Legislation will only increase Late Golden Ageã The ... increase Late Golden Ageã The worm and the pro hackerã Everyone is onlineã Horrible levels of vulnerabilityã Exposure of data and professionalization of cybercrimeã Venture community pulls...
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