Liquid Crystal Display Properties and Technology
Director (Vector Director)
The direction of orientation present in a liquid crystal, up or down to the bottom of the page, can be represented by a vertical arrow. There are always two possible choices to aim toward the principal. The two directions are equivalent in the liquid crystal, so any choice is good. The molecular direction of preferred orientation in liquid crystal mesophases.
Electric Field Influence
In general, liquid crystal molecules have permanent or induced electric dipoles, both along
Read MorePlastic Properties, Types, and Manufacturing
Properties of Plastics
Lightweight
This provides comfort when loading and transporting objects or plastic containers.
Impermeable
We can produce fabrics that protect us from the rain, or pipes that carry water or gas.
Photodegradable
Continued exposure to sunlight degrades them and makes them more brittle over time.
Electrical Insulator
We can protect ourselves from electrical accidents if we isolate steel cables with plastic.
Tough (Not So Fragile)
We can manufacture windows, bottles, or lenses for impact-
Masonry Construction: Techniques and Considerations
Masonry manufacturing considers stonework formed of natural stones, arranged and mutually supported by ashlar juxtaposition. In factories, building a monolithic wall requires dividing the clump, a geometric problem resolved through stereotomy: dividing full or partial works in harmony with construction requirements.
Character and Mechanical Conditions
Material must meet character and mechanical conditions, as well as economic and aesthetic aspects. From a constructive point of view, this corresponds
Read MoreMotion Transmission and Transformation Mechanisms
Mechanisms: Transmission and Transformation of Movement
A) Mechanisms of Transmission of Movement
These mechanisms transmit the motion produced by a driving element to another point.
- Linear Transmission:
- Lever: A horizontal bar that rotates around a support point. There are three types (1st, 2nd, and 3rd class) depending on the position of the support point, effort, and resistance.
- Fixed Pulley: A grooved wheel that revolves around an axis.
- Mobile Pulley: A set of two pulleys, one fixed and the other
Stainless Steel: Properties, Types, and Applications
Stainless Steels: Properties and Applications
Stainless steels contain chromium, nickel, and other alloying elements that make them shiny and resistant to oxidation. Some stainless steels are very tough and resilient, maintaining long-term resistance to extreme temperatures. Due to its brightness, architects use it extensively for decorative purposes. It is also widely used for pipes, oil depots, and chemical products because of its resistance to oxidation, and in the manufacture of surgical instruments
Correspondences and Applications: Sets and Functions
Correspondences and Applications
Given two sets, A and B, a correspondence, denoted as f: A → B, is any rule or criterion that associates elements of set A with elements of set B. If an element x ∈ A is associated with an element y ∈ B, we say that “y is the image of x under the correspondence f” or that “x is the original element of y”. This is expressed as y = f(x).
In any correspondence f: A → B, we distinguish the following concepts:
- Initial set of f: Set A.
- Final set of f: Set B.
- Original