Aug
22

The Windsor Locks, Connecticut tornado struck on October 3 1979. The short-lived, but intense F4 tornado (see Fujita scale) caused 3 deaths, 500 injuries, and - with more than $300 million in property damage along an 11-mile path - ranks as one of the most expensively destructive tornadoes in American history.

The tornado touched down in the town of Poquonock, Connecticut, just north of Hartford, Connecticut in the Connecticut River valley. It traveled north through the town of Windsor Locks, Connecticut before dissipating in the town of Suffield, Connecticut, just south of the Massachusetts state line.

The path of the tornado crossed the northern portion of Bradley International Airport, and many vintage aircraft at the nearby New England Air Museum were damaged or destroyed by the storm.

Aug
22

Luggage locks, Joint lock

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A joint lock is a grappling technique involving manipulation of an opponent’s joints in such a way that the joints reach their maximal degree of motion.

In budo these are referred to as, 関節技 kansetsu-waza, “joint locking technique”Ohlenkamp, Neil. Classification of Techniques in Kodokan Judo. judoinfo.com. Accessed February 26 2006.) and in Chinese martial arts as Chin na su which literally means “technique of catching and locking”.

These typically involve isolating a particular joint, and leveraging it in an attempt to force the joint to move past its normal range of motion. Joint locks usually involve varying degrees of pain in the joints, and if applied forcefully and/or suddenly, may cause injury, such as muscle, tendon and ligament damage, even dislocation, or bone fractures.

Joint locks can be divided into five general types according to which section of the body they affect:

  • Armlocks
  • Leglocks
  • Small joint manipulation
  • Spinal locks
  • Wristlocks

These general types can be further divided into subtypes according to which specific joint(s) they affect, or the type of motion they involve.

Usage

Joint locks are commonly featured in all forms of grappling, whether it be in martial arts, self-defense, combat sport or hand to hand combat application. The variants involving lesser leverage on a smaller joint (such as wristlocks) are often featured in law-enforcement or self-defense application, where they are used as pain compliance holds. Joint locks that involve full body leverage can on the other hand be used in hand to hand combat to partially or fully disable an opponent, by tearing major joints such as knees or elbows.

Common martial arts featuring joint locks include Aikido, Brazilian Jiu-Jitsu, Catch Wrestling, Hapkido, Jiu-Jitsu, Judo, Ninjutsu and mixed martial arts. They are usually practiced in a maximally safe manner, with controlled movements, and releasing the joint lock once it is apparent that it has been effectively applied. In combat sports, joint locks are used as submission holds, and are intended to force the opponent to submit; the lock will be controlled and held until an opponent submits or a referee recognizes the threat of injury and intervenes. The types of joint locks allowed in competitions featuring them varies according to the perceived danger in their application. Armlocks are generally considered safer, while small joint manipulation and spinal locks are banned in nearly all combat sports.

Aug
22

Locked luggage, Lock (database)

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A lock is used when multiple users need to access a database concurrently. This prevents data from being corrupted or invalidated when multiple users try to write to the database. Any single user can only modify those database records (that is, items in the database) to which they have applied a lock that gives them exclusive access to the record until the lock is released.

There are two mechanisms for locking data in a database: pessimistic locking, and optimistic locking. Pessimistic locking is where a record or page is locked immediately when the lock is requested, while an optimistic lock is where a record or page is only locked when the changes made to that record are updated. The latter situation is only appropriate when there is less chance of someone needing to access the record while it is locked; otherwise it cannot be certain that the update will succeed because the attempt to update the record will fail if another user updates the record first. With pessimistic locking it is guaranteed that the record will be updated.

MS SQL Server was complained about lack of row-level locking capabilities. Until version 6.5, all locking was done at the page level (a 2K unit of data). The problem with a page-level locking mechanism surfaces when multiple records exist on the same page and multiple processes must access information on the same page. If the page is locked by a process, other processes must wait to access the data. These situations may result deadlocks.

The degree of locking can be controlled by isolation level.

Aug
22

Locked luggage, Handcuff knot

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A handcuff knot is an inline knot with two adjustable loops in opposing directions, with the ability to tighten the two loops around hands or feet. The knot doesn’t possess any noose action, so the knot won’t be as easy to use for such purposes as the name might suggest.

The knot is also known as a hobble knot for similar reasons, from the idea that the knot was sometimes used on the legs of horses to limit the distance their riders had to walk in the morning to retrieve them.

The knot consists of two simple loops, overlaid, and with the ends pulled through. At that stage, the knot is slippery and easy to adjust. The knot can be “locked” by making one or more overhand knots with the loose ends in the manner of a Reef knot.Des Pawson, Pocket Guide to Knots & Splices (Edison, NJ: Chartwell Books, Inc., 2002), 146.

The sizes of the two loops can also be fixed by making Half hitches with each end over the necks of the loops. This configuration is known as the Fireman’s chair knot.

References

Aug
21

Locked luggage, Behind Locked Doors

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Behind Locked Doors is a 1948 black-and-white B-movie starring Lucille Bremer. The movie, directed by Budd Boetticher, runs a scant 62 minutes. The film also stars Richard Carlson and features Tor Johnson (uncredited) as ‘The Champ’. Like many films noir, the lighting is used creatively to hide some cheap sets and other signs of a low movie budget.

Plot

A private detective goes undercover in an asylum in search of a judge who is hiding out from the police. The detective was hired by a pretty reporter that’s sure that the judge is hiding out in the private sanitarium. The reporter and P.I. begin to fall in love as well as falling more and more into danger from abusive attendants and other guests of the asylum. Other inmates include an arsonist patient and ‘The Champ,’ a man who attacks anyone put into a room with him.

Reviews for the movie when released on DVD in 2002 were mixed. Keith Phipps, writing for the Onion AV Club, found that they don’t make B-movies like they used to. He wrote this of Behind Locked Doors: “A probable inspiration for Sam Fuller’s Shock Corridor, Doors suffers in comparison; Fuller made transcendent B-movies, and this isn’t one. In just about every other respect, however, it’s everything it should be: fast-paced, stylishly shot, a little lurid, a little topical, and thoroughly entertaining.” When asked about the similarity of his film’s story to the earlier film, director Sam Fuller pointed out that both scripts were based on a newspaper incident in the 1940s (Fuller had been a newspaper reporter at the time.)

Aug
21

Luggage locks, Warded lock

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A warded lock (also called a ward lock) is a type of lock that uses a set of obstructions, or wards, to prevent the lock from opening unless the correct key is inserted. The correct key has notches or slots corresponding to the obstructions in the lock, allowing it to rotate freely inside the lock. Warded locks are commonly used in inexpensive padlocks, cabinet locks, and other low-security applications, since they are among the most easily circumvented by lock picking. A well-designed skeleton key can successfully open a wide variety of warded locks.

History

The warded lock is one of the most ancient lock designs still in modern use. It is thought to have been developed in ancient Rome.

Design

In the most basic warded lock, a set of obstructions, often consisting of concentric plates protruding outwards, blocks the rotation of a key not designed for that lock. Warded locks may have one simple ward, or many intricate wards with bends and complex protrusions; the principle remains the same. Unless the notches or slots in the key correspond to the wards in the lock, the key will strike an obstruction and will not turn.

A cylindrical post is typically located in the center of the lock. Its purpose is to provide a point of leverage for rotating the key, and to help correctly align the key with the wards. The key has a corresponding hole which fits over the post.

When the correct key is inserted, it will clear the wards and rotate about the center post. The key may then strike a lever, activating a latch or sliding bolt, or it may itself push against the latch or bolt. In a double action lever lock, the key may additionally push against a spring-loaded lever which holds the sliding bolt in place.

Aug
21

Locked luggage, Čezeta

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The Čezeta was a motor scooter manufactured from 1957 to 1964 in what was then Czechoslovakia, (now the Czech Republic), by the Česká Zbrojovka Strakonice (ČZ) company, which manufactured motorcycles from 1935 to 1997.

The Čezeta was unusually long for a two-wheeled vehicle, having a torpedo-shaped body with a long seat that lifted to reveal a substantial luggage compartment, using space that in most scooters was occupied by the fuel tank. The front mudguard was fixed to the body and fully streamlined into the legshields. It contained the fuel tank with the headlight fitted into a recess low in the front and a luggage rack on the flat top surface. It was a common joke amongst Čezeta riders that the exposed front tank with built in headlight formed an explosive warhead and detonator for the torpedo, though in practice the Čezetas proved no more likely to catch fire than any other motor scooter, even in serious collisions.

The scooter was driven by the 175cc or 200cc ČZ two-stroke single-cylinder motorcycle engine, giving a top speed of 55mph. The engine was modified for the enclosed scooter by having a drive pulley on the crankshaft driving a fan by means of a Vee belt. There were four foot-operated gears.

The 501 model, built from 1957 to 1959, had the rear wheel supported on one side only and suspended by a rubber block. The later 502 model had a full fork with motorcycle shock absorbers.

A three-wheeled utility version, the 505, was built starting in 1960. This vehicle used mechanical components and front bodywork from the 502.

N-Zeta

In New Zealand, during the 1960s a local company, JNZ Manufacturing Ltd assembled the ‘Čezeta’ under the name ‘N-Zeta’.

Aug
21

Luggage locks, Göta Canal

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The Göta Canal () is a Swedish canal constructed in the early 19th century. The canal stretche from Gothenburg on the west coast, combined with the river Göta älv and the Trollhätte canal, through the large lakes Vänern and Vättern, in parallel with Motala ström, and to Söderköping on the Baltic Sea.

The architect was Baltzar von Platen, working to plans earlier developed at the request of the Swedish king by the Scottish civil engineer Thomas Telford; he got permission to begin to work on April 11, 1810 and the canal was officially opened on September 26, 1832. Telford himself travelled to Sweden in 1810 to oversee some of the initial excavations on the project.

Built only decades before the advent of railways, the canal was soon outdated, and never upgraded. The canal is a tourist attraction, sometimes called Sveriges blå band (”Sweden’s Blue Ribbon”).

To support the building of the canal with mechanical works, a small engineering workshop was established in Motala called Motala Verkstad. This industry has sometimes been referred to as cradle of the Swedish engineering industry.

In fiction

Several movies depict the canal, most notably the 1981 comedy Göta Kanal, in which two competing yacht constructors race the canal in order to win a huge construction stock order. In 2006, Göta Kanal 2 was released.

Locks

From the east-coast of Sweden all the way to the west-coast the locks are as follows:
(with meters per locks)

  • Mem, 3
  • Tegelbruket, 2.3
  • Söderköping, 2.4
  • Duvkullen nedre, 2.3
  • Duvkullen övre, 2.4
  • Mariehov nedre, 2.1
  • Mariehov övre, 2.6
  • Carlsborg nedre, 5.1
  • Carlsborg övre, 4.7
  • Klämman, open
  • Hulta, 3.2
  • Bråttom, 2.3
  • Norsholm, 0.8
  • Carl Johans slussar (seven locks), 18.8
  • Oskars slussar, 4.8
  • Karl Ludvig Eugéns slussar, 5.5
  • Brunnby, 5.3
  • Heda, 5.2
  • Borensberg, 0.2
  • Borenshult, 15.3
  • Motala, 0.1

Lake Vättern

3.5

  • Tåtorp, 0.2
  • Hajstorp övre, 5.0
  • Hajstorp nedre, 5.1
  • Riksberg, 7.5
  • Godhögen, 5.1
  • Norrkvarn övre, 2.9
  • Norrkvarn nedre, 2.9
  • Sjötorp 7-8, 4.6
  • Sjötorp 6, 2.4
  • Sjötorp 4-5, 4.8
  • Sjötorp 2-3, 4.8
  • Sjötorp 1, 2.9
  • Trivia

    The canal is nicknamed “skilmässodiket” which translates to “divorce ditch”. The name refers to the stress endured by couples navigating the numerous locks in the canal.

    Aug
    20

    Luggage locks, Two Locks

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    Two Locks is a suburb of Cwmbran in the county borough of Torfaen, traditional county of Monmouthshire, southern Wales, United Kingdom.

    The locks in question are part of the Monmouthshire & Brecon Canal in its southern section between Newport and Pontypool.

    Demographics

    At the 2001 Census

    • Population 6572 (Torfaen 90,949)
    • 49.1% Male, 50.9% Female
    • Ages
      • 23.3% aged between 0-15
      • 41.1% aged between 16-44
      • 21.7% aged 45-59/64
      • 13.9% of pensionable age
    Aug
    20

    Locked luggage, CIGAR (aviation)

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    CIGAR is a mnemonic that refers to a pre-takeoff checklist performed by general aviation pilots. The mnemonic stands for:

    • Controls: Check for freedom, full deflection of control surfaces and that they move in the direction they’re meant to!
    • Instruments: Check instruments for proper operation, indication, and setting.
    • Gas: Check to insure proper fuel supply; this will include fuel shutoff valve, mixture, fuel selector switch, and electric fuel pump, if so equipped.
    • Airplane: A general check of the airplane and occupants, ie seatbelts on, door closed and locked, everything secure (no pens etc loose), seats upright and locked in place (those that slide back and forth or tilt). Trim tabs can be checked here, but they should always be checked and adjusted in the pre-takeoff checklist.
    • Run-up: Perform the engine run-up check; this will include checking magnetos, engine instrument indications, and carburetor heat, if so equipped.