The freeway with narrowly spaced interchanges concentrates and mitigates the access problem, but it also acts inevitably as an artificial, isolating boundary.

For shapes with curved boundary, calculus is usually required to compute the area.

A classic example of this is the replacement of the non-avian dinosaurs with mammals at the end of the Cretaceous, and of brachiopods by bivalves at the Permo-Triassic boundary.

In 1893, Mortimer Durand was deputed to Kabul by the government of British India for this purpose of settling an exchange of territory required by the demarcation of the boundary between northeastern Afghanistan and the Russian possessions, and in order to discuss with Amir Abdur Rahman Khan other pending questions.

Expanding upon the work of Lanchester, Ludwig Prandtl is credited with developing the mathematics behind thin-airfoil and lifting-line theories as well as work with boundary layers.

Discussions continue with Croatia on several small disputed sections of the boundary related to maritime access that hinder final ratification of the 1999 border agreement.

Malaysia's land boundary with Brunei around Limbang is currently in dispute.

; 3. 1: To test a shuttlecock, use a full underhand stroke which makes contact with the shuttlecock over the back boundary line.

However, since " bronze " is a somewhat imprecise term, and historical pieces have variable compositions, in particular with an unclear boundary with brass, modern museum and scholarly descriptions of older objects increasingly use the more cautious and inclusive term " copper alloy " instead.

The more familiar triangular boundary in most written works has as its points somewhere on the Atlantic coast of Miami ; San Juan, Puerto Rico ; and the mid-Atlantic island of Bermuda, with most of the accidents concentrated along the southern boundary around the Bahamas and the Florida Straits.

An expanding universe generally has a cosmological horizon which, by analogy with the more familiar horizon caused by the curvature of the Earth's surface, marks the boundary of the part of the universe that an observer can see.

The 800-kilometre boundary with Thailand, coincides with a natural feature, the watershed of the Dangrek Mountains, only in its northern sector.

Cambodia is involved in a dispute regarding offshore islands and sections of the boundary with Vietnam.

In addition, the maritime boundary Cambodia has with Vietnam is undefined.

Parts of Cambodia's border with Thailand are indefinite, and the maritime boundary with Thailand is not clearly defined.

The end of the Cretaceous is defined by the K – Pg boundary, a geologic signature associated with the mass extinction which lies between the Mesozoic and Cenozoic Eras.

Also known as the K – T extinction event, it is associated with a geological signature known variously as the K – T boundary, the Cretaceous – Paleogene boundary or the K – Pg boundary, usually a thin band of sedimentation visible wherever rocks of this age are exposed.

Mammalian clades passed through the boundary with few extinctions, evolving and thriving well past the event.

Because the western boundary was contested at the time of the Purchase, President Jefferson immediately began to organize three missions to explore and map the new territory.

Orange County is the county in the very southeastern corner of Texas, with a boundary with Louisiana but does not have a seacoast on the Gulf of Mexico as Jefferson County and Sabine Lake border Orange County to the South.

When writing his letter, Banneker informed Jefferson that his 1791 work with Andrew Ellicott on the District boundary survey had affected his work on his 1792 ephemeris and almanac by stating:

One of Jefferson County's neighbors has only a short boundary with it.

The southern boundary with Jefferson County is formed by Pine Island Bayou.

Walnut Hill is located near the southern boundary of Marion County, next to Jefferson County.

* Pittsford is an unincorporated community on the boundary with Jefferson Township.

In the mid-19th century the boundary with the adjacent township of Kilkenny was moved so as to include that township's few residents in Jefferson.

The train tracks mark the northern boundary of Port Jefferson Station, separating it from Port Jefferson.

Its northern boundary is the stream Cross Creek, which separates it from the townships of Cross Creek and Jefferson.

The 1749 party that surveyed the boundary included Peter Jefferson, father of Thomas Jefferson.

Below the North Fork confluence, the Bogachiel River flows along the boundary between Clallam County and Jefferson County, crossing and recrossing the line many times.

** It is also home to the Maine Avenue Fish Market, Arena Stage, the Washington Marina, Fort McNair, and Hains Point ; East and West Potomac Park, a conjunction of two national parks between I-395 and the National Mall that contain the Tidal Basin, the Jefferson Memorial, and the Franklin Delano Roosevelt Memorial ( West Potomac Park continues into Northwest and includes the Lincoln Memorial and World War II Memorial, both of which straddle the Southwest / Northwest boundary );

Later that year, he was commissioned a major by Governor Thomas Jefferson and charged with escorting a group of commissioners to establish a frontier boundary line between Virginia and North Carolina.

The Grant City station on the Staten Island Railway serves the community, and the station immediately to the north is located at and named Jefferson Avenue, this street generally regarded as the boundary between Grant City and neighboring Dongan Hills.

Jefferson Avenue's north end is at 23 Mile Road, near the boundary between Chesterfield Township and New Baltimore ; the southern end of this northern portion is in Berlin Township at the intersection with Dixie Highway and Strong Road.

The selection of the area around the Potomac River, which was the boundary between Maryland and Virginia, both slave states, was agreed upon between James Madison, Thomas Jefferson, and Alexander Hamilton.

The lower 10 miles ( 16 km ) of the river form part of the boundary between Jefferson and Douglas counties.

* Dennis, William Jefferson ( 1931 ) Tacna and Arica: an account of the Chile-Peru boundary dispute and of the arbitrations by the United States Yale University Press, New Haven, ; reprinted in 1967 by Archon Books, Hamden, Connecticut,

According to The History of Jefferson County, Iowa ( 1879 ), " This was a strip of land on the west bank of the Mississippi River, the western boundary of which commenced at the southeast corner of the present county of Davis ; thence to a point on Cedar River, near the northeast corner of Johnson County ; thence northwest to the neutral grounds of the Winnebagoes ; thence to the Mississippi to a point above Prairie du Chien ..." Still another history describes it as extending from the Yellow River in the north to the Des Moines River in the south.

It forms part of the boundary between Jefferson County and Saint Francois County and also part of the boundary between Jefferson County and Washington County.

In January 1968 a one-half mile wide strip was annexed along the Portage Township line, extending the town boundary to Lake Michigan.

* Kurtz is a named locality approximately four miles east of Glennie on the boundary with Mikado Township near the Kurtz Creek ( a tributary of the South Branch Pine River ) at Kurtz was a logging camp by a railroad siding founded by Hugo Kurtz circa 1900.

* Lincoln is a village situated on the boundary between Gustin and Hawes Township and is approximately evenly divided between them.

* The Village of Lincoln is situated on the boundary between Hawes and Gustin Township and is approximately evenly divided between them.

* Alcona is a tiny, unincorporated community in the township on the shore of Lake Huron about one mile ( 1. 6 km ) south of the boundary with Alcona Township at.

The village is situated on the boundary between Gustin Township on the south and Hawes Township on the north and is approximately evenly divided between them.

* Youngs was the name of a post office in the township at, near the southern boundary with Seney Township in Schoolcraft County.

* Sand River is an unincorporated community on M-28 near the mouth of the Sand River at The community is on the western boundary of the township and is partially in Chocolay Township in Marquette County.

The community lies mostly within Dorr Township but lies on the eastern boundary and some development extends into neighboring Leighton Township.

* North Dorr is a tiny hamlet at straddling the boundary between Dorr Township in Allegan County and Byron Township in Kent County.

The city is situated on M-89 on the boundary between Manlius Township on the north and Clyde Township on the south.

The community is on the boundary between Laketown Township in Allegan County and Park Township in Ottawa County, however it is on the south side of Lake Macatawa separated from most of Park Township at.

The community lies mostly within neighboring Dorr Township but lies on the boundary and some development extends into Leighton Township.

* Shelbyville is a small unincorporated community in the north of the township on the boundary with Wayland Township.

* Shelbyville is a small unincorporated community in the south of the township on the boundary with Martin Township at.

The village is located on the boundary between Forest Home Township on the west and Kearney Township on the east, separated by the Intermediate River with the larger portion within Kearney Township.