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Sargent and Greenleaf

Sargent and Greenleaf, more commonly known among locksmithing circles as S&G, is a U.S. company that manufactures combination locks, key-operated safe and safe deposit box locks and associated equipment.

The company was established in 1865 when James Sargent and Halbert Greenleaf became partners. A manufacturing facility was built in Rochester, New York, and the company remained in that city until 1975. Since then, the company has been in Nicholasville, Kentucky.

In 1857 Sargent had designed the Sargent’s Magnetic Bank Lock, said to be the first successful key changeable combination lock.

In 1873 Sargent created the first time lock, using parts from eight-day clocks.

In 1880 Sargent connected one of his combination locks to a delay timer, creating the first time-delay combination lock.

Locks are sold around the world through associated distributors.

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Chambly Canal

The Chambly Canal is a National Historic Site of Canada in the Province of Quebec, running along the Richelieu River past St-Jean-sur-Richelieu and Chambly. Building commenced in 1831 and the canal opened in 1843. It served as a major commercial route during a time of heightened trade between the United States and Canada. Trade dwindled after World War I, and as of the 1970s, traffic has been replaced by recreational vessels.

It is part of a waterway that connects the Saint Lawrence River with the Erie Canal in the United States. Lake Champlain and the Champlain Canal form the U.S. portion of the Lakes to Locks Passage.

William Lauder, a Scots-Quebecer stonemason, was one of the prime contractors who built the canal.

The Canal has 10 bridges and 8 hand operated and one hydraulic locks.

  • Draft: 1.98 m (6.5 ft)
  • Clearance: 8.84 m (29 ft)
  • Canal Length: 18.96 km (12 mi)
  • Dimensions of smallest lock: 33.52 m (110 ft) x 7 m (21 ft)
  • Passage time: 3 to 5 hours


External links

  • Official website

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DenyHosts

DenyHosts is a Python based security tool for SSH servers. It is intended to prevent brute force attacks on SSH servers by monitoring invalid login attempts in the authentication log and blocking the originating IP addresses. Denyhosts is developed by Phil Schwartz the developer of several other popular open source tools such as Kodos and ReleaseForge.

Fail2ban is a similar program that prevents SSH brute force attacks.


Operation

When run as a cron job, DenyHosts checks the end of the authentication log for recent failed login attempts. It records information about their originating IP addresses and compares the number of invalid attempts to a user-specified threshold. If there have been too many invalid attempts it assumes a dictionary attack is occurring and prevents the IP address from making any further attempts by adding it to /etc/hosts.deny on the server. DenyHosts 2.0 and above support centralized synchronization, so that repeat offenders are blocked from many computers.

Additionally, DenyHosts provides a daemon mode running from /etc/init.d or equivalent on unix-like operating systems.


See also

  • TCP Wrappers
  • OpenSSH
  • lsh
  • BlockHosts


External links

  • DenyHosts website
  • DenyHosts statistics and centrally blocked hosts
  • The homepage of Phil Schwartz
  • ReleaseForge is a GUI for SourceForge project administrators
  • Kodos is a Regular Expression debugger
  • Fail2ban website

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Sonning Lock

Sonning Lock is a lock and weir situated on the River Thames at the village of Sonning near Reading, Berkshire, England. It is owned and managed by the Environment Agency.


Access to the lock

The lock is a short walk below Sonning Bridge which is close to the centre of Sonning.


Reach above the lock

In the latter half of the reach, accessible by an entrance on the northern bank is the vast marina and water space at Caversham. Opposite is the entrance to the Kennet and Avon Canal at Blake’s Lock. The Thames Path stays on the southern bank all the way to Caversham lock, crossing the River Kennet on Horseshoe bridge which isattached to Brunel’s Great Western Railway Bridge.


Literature and the Media

“The floral tastes of the lock-keeper generally make Sonning Lock very bright and gay.”

— Charles Dickens (1882)
Is there a spot more lovely than the rest,
By art improved, by nature truly blest?
A noble river at its base running,
It is a little village known as Sonning.

— James Sadler (1845–1885), Sonning lock keeper


See also

  • Locks on the River Thames
  • Sonning Bishop’s Palace, nearby

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Richmond Lock and Footbridge

Richmond Lock and Footbridge is a lock and pedestrian bridge, situated on the River Thames in south west London, England. It is the furthest downstream of all the Thames locks and is the only one owned and operated by the Port of London Authority. It was opened in 1894 and is situated close to the centre of Richmond in the south western suburbs of London. It connects Richmond on the east bank with the neighbouring district of St. Margarets on the west bank during the day, but is now closed at night to pedestrians - after 19:30 GMT or after 21:30 when BST is in use.


Description

Technically, Richmond Lock is a half-tide lock and barrage, which also incorporates a public footbrige. The footbridge crosses both the conventional lock and the barrage, which comprises three vertical steel sluice gates suspended from the footbridge structure. These gates weigh 32 tons each and are 66 feet in width and 12 foot in depth. The lock permits passage of vessels up to 250 feet long by 26 feet 8 inches wide.

For about two hours each side of high tide, the sluice gates which make up the barrage are raised into the footbridge structure above, and river traffic can pass through the barrage unimpeded. For the rest of the tidal cycle the sluice gates are closed, and ships and boats must use the lock alongside the barrage. The barrage has the effect of maintaining the water level between Richmond Lock and Teddington Lock (the next lock upstream) at or above half-tide level. The maximum fall of the lock is 10 feet.


See also

  • Locks on the River Thames
  • Crossings of the River Thames


External links

  • Richmond Lock (Tour UK)


Location

  • Wikimapia


Sources

  • http://www.thames-tideway.co.uk/richlock.shtm
  • http://www.victorianlondon.org/ql/queenslondon105.htm

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Internet Data Exchange

An Internet Data Exchange (IDX) is a real estate property search site which allows the public to conduct searches of approved Multiple Listing Service properties in a certain area.

Site users generally gain the benefit of anonymous property searching and review. IDX sites usually provide less detailed information than the full Realtor Multiple Listing Service, limiting the data to that which is deemed publicly accessible. The benefit to realtors is that users of their IDX web site can search freely, establish some confidence, and qualify themselves before contacting the realtor.

Certain rules apply to the real estate companies’ ability to display each detail about a property. These “display rules” are set by the Multiple Listing Service organization, which generally forms its policy around the recommendations of the National Association of Realtors.

IDX policy is nearing its replacement by a new Internet Listing Display policy being formed by the National Association of Realtors.

A common and standard data exchange protocol for IDX information is the Real Estate Transaction Specification or RETS.


See also

  • Multiple Listing Service (MLS)
  • Real Estate Transaction Specification (RETS)
  • Virtual Office Website (VOW)
  • Internet Listing Display (ILD)


External links

  • IDX (Internet Data Exchange) Information and Resources, National Association of Realtors

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Édouard Lock

Édouard Lock (born March 3, 1954) is a Canadian dance choreographer and the founder of the Canadian dance group, La La La Human Steps.

In 2001, he was made a Knight of the National Order of Quebec and an Officer of the Order of Canada. In 2006, he was made a Fellow of the Royal Society of Canada. [1]


External links

  • Édouard Lock at The Canadian Encyclopedia

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Conservative two-phase locking

In computer science, conservative two-phase locking (C2PL) is a locking method used in DBMS and relational databases.

Conservative 2PL prevents deadlocks.

The difference between 2PL and C2PL is that C2PL’s transactions obtain all the locks they need before the transactions begin. This is to ensure that a transaction that already holds some locks will not block waiting for other locks.

In heavy lock contention, C2PL reduces the time locks are held on average, relative to 2PL and Strict 2PL, because transactions that hold locks are never blocked.

In light lock contention, C2PL holds more locks than is necessary, because it is hard to tell what locks will be needed in the future, thus leads to higher overhead.

Also, a transaction will not even obtain any locks if it cannot obtain all the locks it needs in its initial request. Furthermore, each transaction needs to declare its read and write set (data items to be read/written during transaction), which is not always possible. Because of these limitations, C2PL is not used very frequently.

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Pleasures Pave Sewers

Pleasures Pave Sewers is the debut album of grindcore band Lock Up, a side project of Napalm Death, featuring Peter Tägtgren on vocals.


Track listing

  1. “After Life in Purgatory” (2:08)
  2. “Submission” (2:46)
  3. “Triple Six Suck Angels” (2:58)
  4. “Delirium” (1:56)
  5. “Pretenders of the Throne” (1:45)
  6. “Slow Bleed Gorgon / Pleasures Pave Sewers” (3:36)
  7. “Ego Pawn” (1:53)
  8. “The Dreams Are Sacrificed” (2:06)
  9. “Tragic Faith” (2:30)
  10. “Darkness of Ignorance” (2:23)
  11. “Salvation thru’ Destruction” (2:24)
  12. “Leech Eclipse” (0:56)
  13. “Fever Landscapes” (1:47)


Credits

  • Peter Tägtgren - Vocals
  • Nicholas Barker - Drums
  • Shane Embury - Bass
  • Jesse Pintado - Guitars

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Mortise lock

Created by Eli Whitney’s ( creator of the cotton gin ) nephews, Eli Whitney and Philos Blake, a mortise lock (also mortice lock in British English) is one that requires a pocket - the mortise - to be cut into the door or piece of furniture into which the lock is to be fitted. In most parts of the world, mortise locks are generally found on older buildings constructed before the advent of bored cylindrical locks, but they have recently become more common in commercial and upmarket residential construction in the United States.

The parts included in the typical mortise lock installation are the lock body (the part installed inside the mortise cut-out in the door); the lock trim (which may be selected from any number of designs of doorknobs, levers, handle sets and pulls); a strike plate, or a box keep, which lines the hole in the frame into which the bolt fits; and the keyed mortise cylinder which operates the locking/unlocking function of the lock body. However, in the United Kingdom, and certain other countries, most mortise locks on dwellings do not use cylinders, but have lever tumbler mechanisms.

The installation of a mortise lock cannot generally be undertaken by the average homeowner since it is labor intensive and requires a working knowledge of basic woodworking tools and methods. Many installation specialists use a mortising jig which makes precise cutting of the pocket a simple operation, but the subsequent installation of the external trim can still prove problematic if the installer is inexperienced.

Although the installation of a mortise lock actually weakens the structure of the typical timber door, a mortise lock does offer more versatility than a bored cylindrical lock, both in external trim, and functionality. Whereas the latter mechanism lacks the architecture required for ornate and solid-cast knobs and levers, the mortise lock can accommodate a heavier return spring and a more solid internal mechanism, making their use possible. Furthermore, a mortise lock will typically accept a wide range of other manufacturers’ cylinders and accessories, allowing architectural conformity with lock hardware already on site.

Some of the most common manufacturers of mortise locks in the United States are Baldwin, Best, Corbin Russwin, Emtek, Falcon, Schlage, and Sargent. Also, many European manufacturers whose products had been restricted to “designer” installations have recently gained wider acceptance and use.

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Deviation

A deviation is a difference or the (real or metaphorical) route followed by a different choice.

Deviation can refer to:

  • Deviation (statistics), the difference between the value of an observation and the mean of the population in mathematics and statistics.

    • Standard deviation, which is based on the square of the difference.
    • Absolute deviation, where the absolute value of the difference is used.
  • Frequency deviation, the maximum allowed “distance” in FM radio from the nominal frequency a station broadcasts at.
  • Magnetic deviation, the error induced in compasses by local magnetic fields.
  • Deviationism, an expressed belief which is not in accordance with official party doctrine.
  • Deviation Records, a record label.
  • Deviant behavior, a behavior that is a recognized violation of social norms.

Deviates is also the name of an American punk rock band.

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Three-point stance

The Three-point stance is a stance used by offensive and defensive linemen in American football as well as running backs. This stance requires one hand to touch the ground with the other arm cocked back to the thigh/hip region. The back should be slightly inclined forward, as well as the arm which is placed on the ground; putting a substantial amount of pressure on the arm that touches the ground.

The head should also be raised toward the opponent when in this position. This prevents the player from serious injury.


External links

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Spot the difference

Spot the difference is a name given to a puzzle where two versions of an image are shown side by side, and the player has to find differences between them. Usually, the image on the left is the original, and the image on the right has the alterations.

Spot the difference puzzles are often found in children’s puzzle books, and in newspapers.

When a difference is found, the player usually draws a ring around the area in the second image. There is usually a notice above the puzzle stating how many differences there are to find. The solution is often given on either an answer page (puzzle book) or written upside-down beneath the puzzle (newspaper).

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G. V. Montgomery Lock

The G. V. Montgomery Lock (formerly named Lock E) is part of the Tennessee-Tombigbee Waterway. It is located in north Itawamba County, Mississippi, close to the Prentiss County line.

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Balance lock

The balance lock was a type of lock to transport boats up and down a hillside on a canal.

Boats were to ride in caissons, essentially bathtubs, of water which were to be hauled up and down the hillside by chain, being balanced by another tub of water. It was patented by James Fussell during his work on the Dorset and Somerset Canal.


External links

  • Dorset and Somerset canal, with information on locks

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Hatherton Canal

The Hatherton Canal is a derelict branch of the Staffordshire and Worcestershire Canal in south Staffordshire, England.

When it was built it ran 4 miles (6 km) through eight locks from Hatherton Junction on the Staffordshire and Worcestershire Canal to Churchbridge Junction on the Churchbridge Branch (a short branch with thirteen locks) of the Cannock Extension Canal (a branch of the Wyrley and Essington Canal). It was completed in 1860. Subsidence due to mining caused its closure in 1955.

The canal is now part of an active restoration project. However, due to building on the cut, the current plans call for the canal to deviate from the original route in places. This includes new tunnels under the A5 road and a cluvert, already in place, over the M6 Toll motorway.


See also

  • Canals of Great Britain
  • History of the British canal system


External links

  • Lichfield & Hatherton Canals Restoration Trust

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CREST

CREST is the Central Securities Depository for the U.K., Republic of Ireland, Isle of Man and Jersey equities and UK gilts. It operates a settlement system, allowing trades that have been agreed to be settled.

It allows shareholders and bondholders to hold assets in a dematerialised, i.e. electronic, form, rather than holding physical share certificates. CREST also serves a number of other important functions, such as assisting in the payments of dividends to shareholders.

CREST is also an “Electronic Trade Confirmation System” (”ETC”) (using TRAX). When parties to a transaction make a deal, they both electronically confirm their sides of the transaction via file transfer. Both parties are required to submit confirmation details to CREST. In the event that transaction details do not match, CREST will highlight the issues and ensure that the problems are resolved as soon as is practicable.

Given that stamp duty is only sufferable on physical share certificates, there is no stamp duty payable on shares settled via CREST. There is, however, stamp duty reserve tax. This is collected by CREST on behalf of Her Majesty’s Revenue and Customs.

CREST was acquired by Euroclear in September 2002.


CREST Members

There are two classes of members on CREST: members and sponsored members. Members are usually pension funds, inter dealer brokers or other large financial institutions with significant resources. Sponsored members have the same rights and responsibilities as members. However, given that they do not have the financial or technical resources of the full members they rely on their sponsoring member to interface with CREST.


See also

  • London Stock Exchange
  • LCH.Clearnet
  • CREST if you were looking for the Council of Registered Ethical Security Testers


External link

  • CREST

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Neptune’s Staircase

Neptune’s Staircase is a staircase lock comprising eight locks on the Caledonian Canal. It is the longest staircase lock in the United Kingdom, and lifts boats 64 feet (19.5 metres). The locks were originally hand-powered, but have been converted to hydraulic operation.
The base plinths of the original capstans are still present, although the capstans themselves are now gone.

The current lock gates weigh 22 tons each, and require a team of three lock-keepers (at minimum) to run the staircase.

It is usual for them to operate on an “Efficiency Basis”, that is the keepers try to either fill each cut with boats on the lift or drop, or to allow for passing, ie a dropping craft to pass a rising craft on the same fill/empty cycle.

It is one of the biggest staircases in Britain, and is kept by British Waterways.

It is located at Banavie, near Fort William just north of Loch Linnhe.

The structure was designed by Thomas Telford.

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Wet dock

A wet dock is a dock where the level of water in the dock is maintained despite the raising and lowering of the tide. This makes transfer of cargo easier. It works like a lock which controls the water level and allows passage of ships.


External links

  • http://www.slamnet.org.uk/SuffolkAir/urban37.html

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Hoard memory allocator

The Hoard memory allocator, or Hoard, is a memory allocator for Linux, Solaris, Microsoft Windows and other operating systems. Hoard can improve the performance of multithreaded applications by providing fast, scalable memory management functions (malloc and free). In particular, it reduces contention for the heap (the central data structure used in dynamic memory allocation) caused when multiple threads allocate or free memory, and avoids the false sharing that can be introduced by memory allocators. At the same time, Hoard has low fragmentation.


External links

  • The Hoard web page.
  • Emery Berger, Hoard’s author and a professor at the University of Massachusetts Amherst.