surface anatomy of the face tension lines of the skin face and neck
the broadband problem anatomy of a market failure and a policy dilemma
... feasible) broadband speeds, and the structure of these services further reduces their utility Slow residential Internet access is but the tip of the problem, however The broadband problem in fact ... products, and systems are designed with modular architectures and standardized, externally open interfaces Products and systems consist of assemblages of standard subsystems; and the structure of the ... forthcoming The subsequent crash devastated the CLEC sector, thereby reducing the competitive pressure felt by the ILECs To add to the woes of the industry and of the economy in general, local broadband...
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HELLO! - ANATOMY OF COMMUNICATION AN INSTALLATION AND TALK SHOW pptx
... about the room and the furniture; it’s also about what happens between them and about the people who use them and interact in the common office space How we will communicate in our work in the ... 2011, the commission went to U glyCute and they interpreted the theme ‘Meetings’ on the basis of a number of historic meeting places and their modern equivalents In 2012 Monica Förster took on the ... itself in the installation and along the topics for the 2013 edition of The Hello Show As a build up to the fair, the Hello-blog will bring p erspectives on the subject from different angles and...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 1 potx
... of surface layers, based on mathematical modeling 2.3.3 Micro and nanometric testing 2.3.4 Rational application of surface layers References The solid surface 3.1 The significance of the surface ... 3.2 The surface - geometrical concept 3.3 The surface - mechanical concept 3.4 The surface - physico-chemical concept 3.4.1 The phase 3.4.2 Interphase surface - a physical surface 3.4.3 Surface ... broadening the range of activity to other methods of formation of surface layers The year 1985 saw the first edition of the quarterly Surface Engineering”, published by the Wolfson Institute for Surface...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 2 potx
... magnetic and electric fields and determined the ratio of the charge to the mass of the electron Proof of the constant value of this ratio came later The first direct and fairly accurate measurement of ... technology, which together form surface engineering 2.3.1 Perfection and combination of methods of manufacturing of surface layers The development of manufacturing methods of surface layers will largely ... particular, of electrical heating The role of surface engineering in the process of manufacture of the material product is shown in Fig 2.1 Fig 2.1 Role of surface engineering in the process of manufacture...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 3 pptx
... on the surface are absorbed by the treated material A portion, proportional to the atomic number of the absorbing material and to the deflection of the beam from the normal to the treated surface, ... detrimental heating of the vacuum chamber [8] Upon falling on the surface of the heated material, the electron beam causes secondary emission (P e) of electrons from the surface and thermoelectron ... heat created as the result of interaction of the electron beam on the material may be, therefore, said to have a normal surface distribution with the maximum in the axis of the beam and normal volumetric...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 4 pptx
... chapter three The solid surface 3.1 The significance of the surface The surface of living organisms limits them and protects them from the environment Similarly, in technology, the surface limits ... electrons of surface atoms, therefore of surface atoms themselves, is different from that of atoms from within the crystal The described surface is not an inter-phase surface because while the solid ... processing The processed surface - the surface which constitutes the boundary of the processed object in the area where the processing was carried out 3.4 The surface - physico-chemical concept 3.4.1 The...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 5 pot
... the surface energy and other physical properties of the surface depend to a large extent on the “history” of the given substance For instance, a fresh fracture surface (a cleaved surface of the ... turbulent state The time of dwell of one molecule at the surface is of the order of a microsecond In the said system there also occurs an exchange of molecules between the surface zone and the adjoining ... pressure of the order of 10-6 Pa It follows that the dwell time of atoms at the surface is of the order of s The general picture of the phenomenon is similar when diffusion rate is considered In the...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 6 doc
... increases from the surface in the direction of the core and then drops off to the level of core hardness (Fig 3.30) A lowering of hardness at the surface of 52100 steel is probably due to the big proportion ... displacement of the said zones in the direction of the material surface With the same radiation parameters, the depth of hardening rises with a rise of thermal conductivity of the treated material The ... contaminants and atoms of foreign inclusions not have the time needed to diffuse into the surface On the other hand, combined action of temperature and vacuum cleans the surface quickly and effectively...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 8 pot
... before, the atomically pure surface of a solid is very active both physically and chemically Besides surface energy and surface tension, at the surface of solids with metallic bonds there occurs ... new surface is created, with properties different to those of the original surface A sudden limitation of the atomic lattice at the time of creation of the new surface causes the formation of ... physically pure surface may be called the subsurface layer (or layers) Since the situation of this layer (or layers), relative to the core of the object, is on the side of the real surface, the term...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 9 potx
... - with thermal emission of ions from the surfaces of solids (Fig 4.11) This source operates on the principle of utilization of ionization of atoms colliding with the surfaces of metals The hollow ... deviations are observed at the surface in the direction of increased concentration, which is the result of ion etching of the implanted material, or under the surface of the material (for x > 2∆Rp), ... layer of lubricant in the process of wear (e.g., Cr) Another possibility is the formation of thin layers of soft oxides of tin or yttrium at the surface, decreasing forces of friction and protecting...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 11 potx
... three-dimensional surface structure and on the type of material of the external zone of the superficial layer and they characterize a set of geometric-material properties of the real surface and of the adherent ... rise of the unevenness of the surface, the degree of corrosiveness of the environment (e.g., a rise of its humidity) and the degree of corrosion (most often the degree of oxidation) All of these ... exposing them to the surface Grooves - surface damage formed by the movement of an element of the mating surface or an element of the cutting tool, forced into the material surface A characteristic of...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 12 pot
... adsorbed, the higher the tension The diminishing of surface tension at the interface indicates a rise in the wettability of the given solid by the liquid If the solvent is water, adsorbents can be, therefore, ... minimum of the sine wave These are the so-called adsorption sites [41] The number of such minima per unit surface may be determined, knowing the geometry of the metal lattice The height of the potential ... is the process of attraction of substances (gases, vapors, solids in solution, ions and liquids) and their collection at the surface of solids and liquids, at the interface between solid and...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 13 pptx
... tangent to the curvature of the meniscus of the wetting liquid, at the point of contact between the liquid and the solid (Fig 5.35) A knowledge of the value of the wetting angle is of significant ... [15, 31] The smoother the surface, the less and the smaller the geometrical flaws and microflaws on it and the more difficult the conditions necessary to initiate fatigue microcracks Of equally ... strength of the softer material In conditions of sliding wear there may occur additional effects, such as squeezing out of the contact surface of the softer material by the protruding asperities of the...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 14 ppsx
... structure of alloys and raises the value of surface energy of the superficial layer The said disturbance is by way of a rise in the number of defects in the lattice, and enhancement of carbon and nitrogen ... moving into the layer (flux of vacancies) and the other out of it (flux of dislocations and atoms) Vacancies are formed as the result of the action of the lubricant which causes the release of metal ... the role of a shock absorber for contact loads carried over from one surface to the other In the initial period of friction the presence of the lubricant inhibits the migration of the point of...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 15 ppsx
... layers of the same phase composition and thickness on both surfaces A and B [20] Fig 5.22 shows thicknesses of the nitrided layer on surfaces A and B of the titanium samples vs time of nitriding The ... chamber, by the power of the voltage generator, design of current feed-throughs, method of load fixturing, and by the method of metering of reactive gases, in particular of chlorides and metal-organic ... compounds In the case of furnaces used for PACVD methods, such furnaces may differ by the design of the working chamber and by the method of elimination of harmful components of the gas atmosphere...
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Surface Engineering of Metals - Principles, Equipment and Technologies Part 18 pot
... vision of the observer The smoother the surface, the more ordered is this reflection and the more equal is the angle of incidence to the angle of reflection The more luster the coating has, the ... [68] The degree of luster is described by the ratio of the coefficient of oriented reflection of the observed surface to the coefficient of total reflection The numerical value of this degree of ... Bulging Bulging is the rise of volume of the paint coating due to absorption of liquids, most frequently of water It will depend on the surface tension and the dielectric constant of the bulging liquid...
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- surface anatomy of the heart ppt
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- surface anatomy of the heart pdf
- surface anatomy of the heart and great vessels
- 52 chapter ii—anatomy of larynx trachea bronchi and esophagus endoscopically considered
- ascs for the production of human skin substitutes and their transplantation
- surface anatomy of the male body
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- surface anatomy of female thoracic wall female breast
- surface anatomy of the upper limb
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- female urogenital triangle surface anatomy of anal region
- 2 dermatitis of the face and neck
- regions of the face and neck
- the rare technique the renaissance of the aging face and neck
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