Boundary

Boundary (plural: boundaries) may refer to

Political geography

Psychology

Sociology

Mathematics and physics

Other

Boundary (topology)

In topology and mathematics in general, the boundary of a subset S of a topological space X is the set of points which can be approached both from S and from the outside of S. More precisely, it is the set of points in the closure of S, not belonging to the interior of S. An element of the boundary of S is called a boundary point of S. The term boundary operation refers to finding or taking the boundary of a set. Notations used for boundary of a set S include bd(S), fr(S), and ∂S. Some authors (for example Willard, in General Topology) use the term frontier instead of boundary in an attempt to avoid confusion with the concept of boundary used in algebraic topology and manifold theory. However, frontier sometimes refers to a different set, which is the set of boundary points which are not actually in the set; that is, S \ S.

A connected component of the boundary of S is called a boundary component of S.

If the set consists of discrete points only, then the set has only a boundary and no interior.

Boundary (company)

Boundary is an Application Performance Management (APM) company based in San Francisco, California. Boundary’s APM solution, also called Boundary, is delivered in a software as a service (SaaS) model. Boundary’s APM software can monitor applications that are running in cloud, on-premises, or hybrid environments. The software displays data as a real-time visual map so that IT managers can see changes to their systems. The application runs on Windows and Linux operating systems.

History

Boundary was co-founded by Cliff Moon, previously an engineer for Powerset. In 2012, Scale Venture Partners and Lightspeed Venture Partners invested $15 million in the company. CEO Gary Read joined the company in 2012. In 2014 Moon acts as the company's CTO.

External links

"crunchbase profile". 

References

Dogū

Dogū (土偶)(meaning "clay figures") are small humanoid and animal figurines made during the late Jōmon period (14,000–400 BC) of prehistoric Japan. Dogū come exclusively from the Jōmon period. By the Yayoi period, which followed the Jōmon period, Dogū were no longer made. There are various styles of Dogū, depending on exhumation area and time period. According to the National Museum of Japanese History, the total number found throughout Japan is approximately 15,000. Dogū were made across all of Japan, except Okinawa. Most of the Dogū have been found in eastern Japan and it is rare to find one in western Japan. The purpose of the Dogū remains unknown and should not be confused with the clay haniwa funerary objects of the Kofun period (250 – 538).

Origins

Some scholars theorize the Dogū acted as effigies of people, that manifested some kind of sympathetic magic. For example, it may have been believed that illnesses could be transferred into the Dogū, then destroyed, clearing the illness, or any other misfortune.

Dog (zodiac)

The Dog (狗) is one of the 12-year cycle of animals which appear in the Chinese zodiac related to the Chinese calendar. The Year of the Dog is associated with the Earthly Branch symbol 戌. The character 狗 refers to the actual animal while 戌 refers to the zodiac animal.

Years and the Five Elements

People born within these date ranges can be said to have been born in the "Year of the Dog", while also bearing the following elemental sign:

Basic astrology elements

See also

External links

References

Dog in Chinese mythology

Dogs are an important motif in Chinese mythology. These motifs include a particular dog which accompanies a hero, the dog as one of the twelve totem creatures for which years are named, a dog giving first provision of grain which allowed current agriculture, and claims of having a magical dog as an original ancestor in the case of certain ethnic groups.

Myth versus history

Chinese mythology is those myths found in the geographic area called China, which of course has evolved and changed throughout its history. These include myths in Chinese and other languages, as transmitted by Han Chinese as well as other ethnic groups (of which fifty-six are officially recognized by the current administration of China). (Yang 2005:4)

In the study of historical Chinese culture, many of the stories that have been told regarding characters and events which have been written or told of the distant past have a double tradition: one which tradition which presents a more historicized and one which presents a more mythological version.(Yang 2005: 12-13) This is also true of some accounts related to mythological dogs in China.