Screen printing is a starting place for my work as a way to explore the possibilities of giving paper and tangible objects a computational affordance. As screen media continues to becomes the replacement to print, I asked the question why are we eliminating artifact. A screen can be anything it wants media wise, however print media establishes a specialty that distinguishes it from its screen counterpart. With the onset of ubiquitous computing, the users ability to contain and possess data will change. As cloud computing become more relevant and owning actual data becomes obsolete, what will be the new attachment to data? I am proposing that paper with a connection to that computation cloud be the interface for the artifacts that we are continually discarding.
Screen printing is a mode of making that produces an artifact that has a textual aspect that lives out side of digital printed media. The hand made unique aspects of layering ink builds on the ideas of attaching to items of value and care. The ability of an artifact to embody the essence of an experience or a piece of data. Screen printing artifacts with computational affordance is helping me ask questions?
check out thesis website : Marginalia: The Hybrid Textbook
A electrical conductor is a material which contains movable electric charges. In metallic conductors, such as copper or aluminum, the movable charged particles are electrons. Positive charges may also be mobile in the form of atoms in a lattice that are missing electrons (known as holes), or in the form of ions, such as in the electrolyte of a battery.
All conductors contain electric charges which will move when an electric potential difference (measured in volts) is applied across separate points on the material. This flow of charge (measured in amperes) is what is meant by electric current. In most materials, the direct current is proportional to the voltage (as determined by Ohm’s law), provided the temperature remains constant and the material remains in the same shape and state.
Most familiar conductors are metallic. Copper is the most common material used for electrical wiring. Silver is the best conductor, but is expensive. Gold is used for high-quality surface-to-surface contacts. However, there are also many non-metallic conductors, including graphite, solutions of salts, and all plasmas. See electrical conduction for more information on the physical mechanism for charge flow in materials.
Non-conducting materials lack mobile charges, and so resist the flow of electric current, generating heat. In fact, all non-superconducting materials offer some resistance and warm up when a current flows. Thus, proper design of an electrical conductor takes into account the temperature that the conductor needs to be able to endure without damage, as well as the quantity of electrical current. The motion of charges also creates an electromagnetic field around the conductor that exerts a mechanical radial squeezing force on the conductor. A conductor of a given material and volume (length × cross-sectional area) has no real limit to the current it can carry without being destroyed as long as the heat generated by the resistive loss is removed and the conductor can withstand the radial forces. This effect is especially critical in printed circuits, where conductors are relatively small and close together, and inside an enclosure: the heat produced, if not properly removed, can cause fusing (melting) of the tracks.
Since all non-superconducting conductors have some resistance, and all insulators will carry some current, there is no theoretical dividing line between conductors and insulators. However, there is a large gap between the conductance of materials that will carry a useful current at working voltages and those that will carry a negligible current for the purpose in hand, so the categories of insulator and conductor do have practical utility.
Thermal and electrical conductivity often go together For instance, most metals are both electrical and thermal conductors. However, some materials are practical electrical conductors without being good thermal conductors.
check out thesis website : Marginalia: The Hybrid Textbook
