RHETORIC in DESIGN -issues for design -16

Post 653 -by Gautam Shah

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Rhetoric is the ‘art of speaking or writing effectively’. (Webster’s Definition) Aristotle describes it as ‘the ability or means of persuasion’. He describes three forms of rhetoric: Ethos (distinctive spirit of a people or an era), Logos (the logic and supportive evidence behind an argument or a reasoned discourse), and Pathos (represents an appeal to the emotions of the audience, and elicits feelings that already resides in them). Rhetoric is used in literary and verbal expressions, by using things that are familiar, but less acknowledged in common usage. In literary and verbal expressions rhetoric is exploited by construction (of the language form) and reinforced through the means of delivery such as rendering diction and graphics.

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Literary and verbal expressions generate instant and consistent impression over their audience or followers. Designed objects like arts, crafts, architecture, graphics, products, etc. however, do not carry an immediate or intense message of persuasion. A design has a persistent delivery, but very variable in content. It gets actualized in many different scenarios.

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Emotions through rhetoric ‘have specific causes and effects’ (Aristotle -book 2.1.2–3). Such dialogues however, do not exist between designers and connoisseurs. ‘Aristotle posits that along with the pathos (an appeal to the emotions of the audience), a speaker must also deploy good ethos (distinctive spirit of a people or an era) in order to establish credibility’. Philo distinguishes between two different types of logos 1 Prophorikos (the uttered word) and 2 Endiathetos (the word remaining within). In case of design-objects, the later one is relevant, as the rhetoric of design is always latent or potential.

640px-Henri_Rousseau_(French)_-_A_Centennial_of_Independence_-_Google_Art_ProjectRhetoric is means of expression or conveyance. In Literature and utterances it gets reinforced through linkages or examples, and altered through feedback from the audience. Such immediate response is not possible for Art, craft or architecture, and if any, it arrives as feed-forward in the make up (training and experience) of the creator. The design feed-forward chiefly relies on the visual rhetoric like books, site visits, media images, etc. But, it is impossible to perceive here ‘one cause to one effect pattern’. Other sensorial inputs like touch, smell, taste, aural, etc., historically had alogical legitimacy. Once a design actualizes, the feedbacks may arrive as historical realizations, but in different time and context. So designs can ‘have traceable past, but uncertain future.

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It is often claimed that visual literacy is of recent origin, when we ignore the mediums of expression and conveyance, which have been with us since primitive age. Wall murals’ images were visual rhetoric, well ‘read’ and capable of arousing Aristotelian pathos (an appeal to the emotions of the audience). Some examples of visual means are charts, graphs, diagrams, photographs, movies, printed media, etc. but though these arouse the pathos but not always as instant response.

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Visual Literacy

The study of visual rhetoric is different from that of visual or graphic design, in that it emphasizes images as sensory expressions of cultural meaning, as opposed to purely aesthetic consideration. (Kress, Gunther, and Theo van Leeuwen. Reading Images: The Grammar of Visual Design. New York: Routledge, 1996.).

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The Design objects like architecture poses a statement only after their making, or on being used as an ‘artifact. Vitruvius stated that a work of architecture is a matter of ‘invention, arrangement, memory, delivery, and style’, and the process was perceived to be similar, to the Aristotelian way of putting together a speech. Design creation is very circumstantial, meant for a client, functions, site, regulatory framework, financial restraints, etc. It, however, needs to be tempered by arrangement, assimilation or composition of many different elements and considerations. These, together offer a holistic character, but realizable only after the creation. Rhetoric in design, if any, is in the design feed-forward, and after its avatar through the feedback. The feed back spreads over a very long period, sometimes after the original entity is destroyed. The Aristotelian depiction of Rhetoric as ‘the ability or means of persuasion’, for designed objects like architecture remains vague or conjectural.

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The ability or means of persuasion were reasonable for artefacts conceived and made by the same person. But modern designers generate designs through surrogates or representations, and transmitted to makers or assemblers as schema or specifications. The communication through a schema is an order for execution, but certainly not for persuasion or concurrence. The instructions, if, any are non-personal and distanced in time. Some designs are too involved with the clients or stake-holders, but many others are panoptic. Designers are self-absorbed to care for persuasion or confirmation of anyone. Rhetoric exists, but as statement of non-confirmation.

Deconstruction Ways by Isidro Blasco

Design disciplines are categorized in four major domains: Graphic Design (Real and abstract -symbols communication), Products Design (objects, artefacts, craft-items), Services Design (software, interaction, stake holders) and Empathetic Design (social concerns).

McKeon, Buchanan state the understanding of design, as of symbols and images1, physical artifacts2, actions and activities3, and environments or systems4.

Architecture Confluence Lyon Deconstruction

Build-Designs are perceived at Two levels. First level consists of assembly of elements like signs, patterns, or images, and the organizational discipline. At another level, there is holistic form that is conceived without any elemental identities.

Kirtimukha_sculptures_on_shikhara_(tower)_of_Amrutesvara_temple_at_AmruthapuraThere are few characteristics common to both the congregated and totalitarian forms. Design, in part or as a whole is an allusion to something separated in time and space, and formed through analogy (comparison) or antithesis (contrast). Antiphrasis is an impressionistic expression to convey non-conventional meaning used for sarcasm. Build-forms or the constituents are given magniloquence by way of exaggerated scale, contrasts, precarious shape and intensive vibrancy.

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There are few features that rhetorize composite forms due to multiplicity of constituents elements. The sub-elements occur as microcosm, recurrence, as directional move, evolution-devolution and support-contrast. These rhetoric elements manifest in scaling, sequencing or within a perceptible domain of time or spatial reference.

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Design objects like architecture, fashion, products, are created for stake-holders and for personal gratification. Objects for personal gratification often result from intense desire to go out of the box as a non-conformal creative activity. This attitude, though very radical, resulting into unusual approaches and solutions, is tied to reality. All worldly creations are governed by factors like gravity, terrain and environment. Arguments of persuasion, justification or acceptance.

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Out of the Box thinking: It is believed, the term for unconventional perspective in thinking, has come from British mathematician Henry Ernest Dudeney. In this, nine dots are to be interconnected by using four lines drawn without the pencil leaving the paper. The puzzle required one to go beyond the dot array boundaries that is move out of the box.

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This is the 16 th article of 20 topics series on ISSUES for DESIGN

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MEANING of CRAFTS -5 -TOOLS

Post 651 -by Gautam Shah

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Tools are implements used by a person in manual operations for production or processing, like manipulation materials, craft-work, building construction, cultivation, food processing, offense-defence, handling, carriage, measurement and expression (writing, drawing, enacting). Tools have been used for making better tools. Tools are for doings things in an easier manner, as well as for doings things that otherwise would not have been possible by hands. There are few conditions where instead of the tools, the supports and other facilitatory structures and arrangements help in creative efforts and productivity.

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Tools are universal implements, used over different tasks and materials. Over a time, though, an exclusive manner of handling develops. The manner of handling evolves a holding mechanism. The holding mechanism, an entity integral with the tool, allowed efficient use of the tool. The combination of a tool and its handling mechanism was a task (and material) specific facility. The tools and handling section, each served different purposes, and so were shaped accordingly. Both faced different stresses and required different composition. But a combination of diverse forms and materials need to be compatible, coordinated and well joined.

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Handled tools extend and modify the reach of the body. The extended reach helps remote access, adds to leverage and allows torque or twisting. For cutting, breaking, beating, copping and such other jobs need leverage for impact or percussive forces.

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A lever amplifies an input force to provide a greater output force. The lever arm is defined as the perpendicular distance from the axis of rotation to the line of action of the force.

Recognizing objects that can work more efficiently was the first craft. Refining by reshaping natural objects for a specific purpose has been one of the oldest craft industries. Some of the basic craft tools were for food preparation, and personal safety and security. Early tools were fragile and often got consumed in the use-processes. And so, the search for new tools was everlasting, alternatively new tools had to be fashioned from old ones. Redefining the tools necessitated search for better materials, sharpening the edge, and tying a handle.

640px-Adzes_from_New_GuineaTools were now of three basic classes: hand-held tools, percussive tools and projectiles. Other sub-classes were like cutting, scrapping, hole making, vessels, holding, measuring, coating-spreading, digging, mixing, etc.

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Primary tool materials were stones, woods, bones, clays and perhaps metals. Some of these could be re-formed by downsizing. Clay and metals were plastic materials that could be re-formed by moulding and additive process.

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Holding tools became important for two main purposes, to hold fine-sized objects and tools and to hold fire or hot things. Fine items like beads, and precious-stones need to be held properly to work upon them. Tool bits like fine and fragile edges need support, whereas fine points for drilling and engravings require adequate gripping. Tools were required to initiate, and work with fire. These included fire-fuel management utilities (chulhas), air blowers, handle for hot tools and holders for vessels. Agriculture related tools like thresher boards, winnowing baskets, sieves, land tillers, etc. Spinning, knitting, and weaving utilities developed for threads and cordage, which were used for binding handles, roof and wall elements, fishing nets, etc.

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Tools, as said earlier, are handy things. But there are many utilities, facilitatory structures and arrangements that have helped creative efforts and productivity. In these, at certain level of detail tools like appendages or similar advantages are invested. One of the first ones was the fireplace that contained the fire, helped efficient use of the fuel and offered resting stands for things to be heated. Similarly structures were created as dwelling spaces, clothes or apparel, shoes, head caps, adornments, toys, totems, murals, shutter systems over openings, hangers for food to protect it from insects and rodents, sleeping mats, hammocks and cradles, lamps that evolved less heat but more light, food grinding stones, narrow neck pitchers for liquid storage, slide for transporting goods, etc.

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At some level the tools, utilities, facilitatory structures and arrangements were merged as devices, machines, apparatuses, equipments or plants. These were integrated with the built-forms, for support, location-based advantage or task setting. The tool, craft and technology were one seamless pursuit. The pursuit also integrated several materials into not only single purpose entities but very specialized task facilities. The task related specializations also created technology-based castes, guilds and communities. The craft communities are tied to terrains and climates. This allows them to develop acutely ethnic styles.

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COPPER -1

Post 477 –by Gautam Shah

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Pure copper nodule 40 mm across

Copper resources of the world are estimated at nearly 5.8 trillion pounds. Of these only about 0.7 trillion pounds have been mined to date. The recycling and recovery rates of copper are so high that of nearly all of the copper mined throughout history, is still in circulation today. This means nearly 80 % of all copper ever mined is still in use today.

Malachite, Zaire> Uploaded by JJ Harrison

Copper was discovered by prehistoric man, in search of shiny stones that when beaten did not break down but rather flattened out. This was sensational discovery leading to search of shiny nodules across lands. Pure Gold and Copper nodules were forged into items of adornments and tools. It was known that several nodules of such pure metals could be forged to form a larger piece. Such nodule findings were rare. But two forms of copper carbonates greenish malachite and bluish azurite were easy to identify and collect from the grounds. Malachite was also used as a gemstone. Similarly many other bright minerals were identified.

Neoclassical vase in malachite in the Hermitage Museum, St Petersburg Uploaded by Dezidor

Azurite 80 x 60 mm Azuritechessy.jpg Uploaded by Archaeodontosaurus

Copper was known around 10000 BC or even earlier. Earliest copper object, a pendant dating 8700 BC, was found Iraq. Copper, in natural nodules form, remained a prized material for a while, but soon became a metal of utility. Unalloyed copper is soft for tools and weapons, but fairly suitable for shaping of utensils. Mesopotamia and Egypt exploited copper for creating tools used in farming, wood working, cooking, etc. These were hoes, adzes, saws, combs , pots, dishes, chisels, harpoons, cloak-pins etc. By 6000 BC it was realized that, although copper was not amenable to casting, it could be worked by hammering, chasing, engraving, and cold-rolling. Sumerians used copper sheets to form sculptures over wooden forms and fastened on walls with copper nails or wires set in bitumen.

Imdugud (also Zu or Anzu), the lion-headed eagle; Sumerian metalwork (sheets of copper), Temple of Ninhursag at Tell al-‘Ubaid; ca. 2500 BC

The Roman supply of copper almost entirely came from Cyprus, and so was known as metal of Cyprus, shortened to cyprium, later corrupted to cuprum. Copper is found at many locations as a primary mineral in basaltic lavas and also as reduced form of copper compounds. It occurs in combination with many minerals, such as chalcocite, chalcopyrite, bornite, cuprite, malachite, and azurite. It is an extremely ductile and malleable metal with high tensile strength. It is an excellent conductor of heat and electric. It is a very noble metal and by acting as a cathode can corrode other contagious metals except stainless steel. It is resistant to most acids and sea water.

Bronze decoration

A Copper alloy with tin is known as bronze. Bronze is a stronger alloy, and harder than both the pure metals. Bronze can be cast. A copper with zinc is called Brass. It was also known that by hammering the copper became hardened, ideal for creation hard edged tools. Copper and its alloys, bronze and brass, mark the first science revolution of man. However, relative scarcity of tin in many regions of the world did not allow use Bronze equally everywhere. Tin-based bronzes were preferred due to the hazard of arsenic poisoning from fumes produced by the oxidation of arsenic-containing minerals. Copper-arsenic alloys, of superior properties to copper in both cast and wrought form, were produced in many regions. Arsenic contents varied from 1 to 7 percent, with up to 3 percent tin. In many civilizations the production of pure copper, arsenical copper, and tin bronze continued together for some time.

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METAL WORKING Processes

Post 151 -by Gautam Shah

Metals in cold and hot state can be deformed into useful shapes. The shape, function, and appearance of metal objects are largely determined by the type of metal used. Precious metals like the gold and silver is comparatively softer to work with, whereas base metals such as the copper, tin, lead, and iron and their alloys like bronze, brass, and pewter may differ widely in their characteristics.

Chinese metal working

The surface quality of a metal begins to emerge during the conversion processes like casting, forging or rolling. Even when some of the processes are cold working, there is a rise in temperature that affects the quality of the surface. In hot conversion processes the reheating conditions, in-line scale removal, rolling temperature, and cooling rate, all determine the surface quality of the product. All these also affect the atmospheric corrosion, paint-ability, and many other subsequent operations. Sometimes the final pass in hot-rolling generates specific surface patterns, such as with the protrusions on reinforcing bars or checkers on floor plates, ribs. In cold-rolling a specific surface, roughness is rolled into the strip at the tempering-mill to improve the deep-drawing operation, and to assure a good surface finish over the final product.

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Literally hundreds of metalworking processes have been developed for specific purposes, but these can be divided into SIX broad groups: Casting, Rolling, Extrusion, Drawing, Forging, and Sheet-metal forming. The first five processes subject a metal to large amounts of strain. However, if deformation occurs at a sufficiently high temperature, the metal will re-crystallize, that is, its deformed grains will be consumed by the growth of a set of new, strain-free grains. For this reason, a metal is usually rolled, extruded, drawn, forged above its re-crystallization temperature. This is called hot working, and under these conditions there is virtually no limit to the compressive plastic strain to which the metal can be subjected. Other processes are performed below the re-crystallization temperature. These are called cold working. Cold working hardens metal and makes the part stronger. However, there is a definite limit to the strain that can be put into a cold part before it cracks.

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Frequent heating and graduated cooling anneal the metal mass more ductile or softer. Similarly sudden cooling by quenching in oil or water, causes the surface to cool much faster then the inner or core mass. This makes a surface of metal objects harder. Annealed and surface hardened materials have not only different structural properties but also have special surface qualities, (e.g. colour, hardness, etc.).

Surface Hardened parts

Metal grains or crystals are far from perfect. Due to the imperfect structure, metals are capable of taking shock loads and reversal of stress, unlike non metal compounds which have very regular crystal structure. When metals, such as steel is used at high temperatures and under uninterrupted stress as in case of boilers, jet engines, power house turbines, hot discharge nozzles, they yield very slowly, stretch, and eventually fracture. Metal components, which under go stress reversals very frequently, fail due to fatigue. These are more pronounced in bridges, crankshafts, etc.

Forging

 Metals are heated and cooled, without reaching to a melting stage, to provide hardening, strengthening, softening, improved formability, improved machinability, stress relief and improved dimensional stability. These thermo mechanical processes are known as annealing, normalizing, stress relief anneals, quench hardening, tempering, nitriding, martempering, austempering, carburizing, solution anneal, ageing, etc. All metals and alloys in common use are heat treated at some stage during processing. Iron alloys, however respond to heat treatment in a unique way because of the multitude of phase changes which can be induced.

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