A Wisdom Archive on Surfaces

In mathematics (topology), a surface is a two-dimensional manifold. Examples arise in three-dimensional space as the boundaries of three-dimensional solid objects. The surface of a fluid object, such as a rain drop or soap bubble, is an idealisation. To speak of the surface of a snowflake, which has a great deal of fine structure, is to go beyond the simple mathematical definition. For the nature of real surfaces see surface tension, ... Including:

• Surface - Examples
• Surface - Definition
• Surface - Classification of closed surfaces
• Surface - Compact surfaces
• Surface - Embeddings in R3
• Surface - Differential geometry
• Surface - Some models
• Surface - Fundamental polygon
• Surface - Connected sum of surfaces
• Surface - Algebraic surface

Read more here: » Surface: Encyclopedia - Surface

In geometry, a (general) conical surface is the unbounded surface formed by the union of all the straight lines that pass through a fixed point — the apex or vertex — and any point of some fixed space curve — the directrix — that does not contain the apex. Each of those lines is called a generatrix of the surface. In general, a conical surface consists of two identical unbounded halves joined by the vertex. However, in some cases, these two halves may intersect, or even c ... Including:

• Conical surface - Equations

Read more here: » Conical surface: Encyclopedia - Conical surface

In human anatomy, the vertebral column (backbone or spine) is a column of vertebrae situated in the dorsal aspect of the abdomen. It houses the spinal cord in its spinal canal. Vertebral column - Curves. Viewed laterally the vertebral column presents several curves, which correspond to the different regions of the column, and are called cervical, thoracic, lumbar, and pelvic. The cervical curve, convex forward, begins at the apex of the odontoid (tooth-like) process, and ends at the mid ... Including:

• Vertebral column - Curves
• Vertebral column - Surfaces
• Vertebral column - Anterior surface
• Vertebral column - Posterior surface
• Vertebral column - Lateral surfaces
• Vertebral column - Vertebral canal
• Vertebral column - Abnormalities
• Vertebral column - Links

Read more here: » Vertebral column: Encyclopedia - Vertebral column

A conning tower is a raised platform on a a ship or submarine, often armored, from which an officer can con the vessel; i.e., give directions to the helmsman. It is usually located as high on the ship as practical, to give the conning team good visibility. Conning tower - Surface ships. On surface ships, the conning tower was a feature of all battleships and armored cruisers from about 1860 through World War I. Beginning in the late 1930s, as radar surpassed visual sighting as the prim ... Including:

• Conning tower - Surface ships
• Conning tower - Submarines

Read more here: » Conning tower: Encyclopedia - Conning tower

In materials science, wear is the errosion of material from a solid surface by the action of another solid. The study of the processes of wear is part of the discipline of tribology. There are four principle wear processes: Adhesive wear Abrasive wear Corrosive wear Surface fatigue Wear - Adhesive wear. Adhesive wear is also known as scoring, galling, or seizing-occurs when two solid surfaces slide over one another under press ... Including:

• Wear - Adhesive wear
• Wear - Abrasive wear
• Wear - Corrosive wear
• Wear - Surface fatigue

Read more here: » Wear: Encyclopedia - Wear

The zygomatic bone (also known as the zygoma; Os Zygomaticum; Malar Bone) is a paired bone of the human skull. It articulates with the maxilla, the temporal bone, the sphenoid bone and the frontal bone. It forms part of the orbit and is commonly referred to as the cheekbone. It is situated at the upper and lateral part of the face: it forms the prominence of the cheek, part of the lateral wall and floor of the orbit, and parts of the temporal and infratemporal fossae [Fig. 1]. It presents a malar and a temporal surface; ... Including:

• Zygomatic bone - Surfaces
• Zygomatic bone - Processes
• Zygomatic bone - Borders
• Zygomatic bone - Ossification
• Zygomatic bone - Articulations

Read more here: » Zygomatic bone: Encyclopedia - Zygomatic bone