MOS (filmmaking)

MOS is a standard filmmaking jargon abbreviation, used in production reports to indicate an associated film segment has no synchronous audio track. It stands for "motor only sync" or "motor only shot". Additionally, the term has been understood to stand for "mit out sound".

Omitting sound recording from a particular shot can save time and relieve the film crew of certain requirements, such as remaining silent during a take, and thus MOS takes are common on film shoots, most obviously when the subjects of the take are not speaking or otherwise generating useful sound.

In post-production, an MOS take may be combined with miscellaneous sounds recorded on location, the musical soundtrack, voice-overs, or sound effects created by a foley artist.

Origins of the term

There are many theories regarding the source of the abbreviation "MOS".

When sound recording reached the point where the sound was recorded on a synchronized but separate piece of media (such as 35mm film, audio tape, or other media) a method of keeping the recording media and camera film "in sync" was needed. The solution was to use a special form of motor which has multiple "windings" in it, and which can be connected to another identical motor in such a way that turning one motor a certain distance will turn the other motor exactly the same distance. The motors did not have to be close together, and, with appropriate circuitry, did not have to be of the same size or power. These motors were called selsyn (self synchronous) motors. A system was created where a single sound recording room could be connected to any of the stages on a studio lot (you can still see the connection points on some of the oldest stages.) The sound mixer (sound man) on stage connected the control panel to the recording room and the camera. There was a selsyn motor on the camera and it was linked to a matching selsyn motor on the sound recording equipment at another point on the studio lot.

Ammonium tetrathiomolybdate

Ammonium tetrathiomolybdate is the chemical compound with the formula [NH₄]₂MoS₄. This bright red ammonium salt is an important reagent in the chemistry of molybdenum and has been used as a building block in bioinorganic chemistry. The thiometallate anion has the distinctive property of undergoing oxidation at the sulfur centers concomitant with reduction of the metal from Mo(VI) to Mo(IV).

Preparation and structure

The salt contains the tetrahedral [MoS₄]²⁻ anion. The compound is prepared by treating solutions of molybdate, [MoO₄]²⁻ with hydrogen sulfide in the presence of ammonia:

Reactions

The anion is also an excellent ligand. For example, with Ni(II) sources, it forms [Ni(MoS₄)₂]²⁻. Much of the chemistry of the thiomolybdate results from studies on salts of quaternised organic cations, such as [NEt₄]₂[MoS₄] and [PPh₄]₂[MoS₄] (Et = C₂H₅, Ph = C₆H₅). These organic salts are soluble in polar organic solvents such as acetonitrile and dmf.

The thermal decomposition of [NH₄]₂[MoS₄] leads to molybdenum trisulfide (MoS₃), ammonia (NH₃) and hydrogen sulfide (H₂S), beginning at 155 °C till 280 °C.

United States Marine Corps Force Reconnaissance

The Force Reconnaissance companies, also known as Force Recon, are one of the United States Marine Corps's special operations capable forces (SOC) that provide essential elements of military intelligence to the command element of the Marine Air-Ground Task Force (MAGTF); supporting their task force commanders, and their subordinate operating units of the Fleet Marine Force (FMF).

Historically, the Force Recon companies, detachments and platoons performed both deep reconnaissance and direct action (DA) operations. Some missions are now shared by the Marine Special Operations Teams (MSOT), due to the establishment of the U.S. Marine Special Operations Command (MARSOC) in 2006. MARSOC was formed from Force Recon's direct action platoons, and now are capable of performing many of the same mission sets for USSOCOM. This dual existence now allows the FORECON companies to focus on excelling in their primary intelligence-gathering mission, as well as the Visit, Board, Search, and Seizure (VBSS) side of the specialized raid mission.

Head (watercraft)

The head (or heads) is a ship's toilet. The name derives from sailing ships in which the toilet area for the regular sailors was placed at the head or bow of the ship.

Design

In sailing ships, the toilet was placed in the bow for two reasons. Firstly, since most vessels of the era could not sail directly into the wind, the winds came mostly across the rear of the ship, placing the head essentially downwind. Secondly, if placed somewhat above the water line, vents or slots cut near the floor level would allow normal wave action to wash out the facility. Only the captain had a private toilet near his quarters, at the stern of the ship in the quarter gallery.

In many modern boats, the heads look similar to seated flush toilets but use a system of valves and pumps that brings sea water into the toilet and pumps the waste out through the hull in place of the more normal cistern and plumbing trap to a drain. In small boats the pump is often hand operated. The cleaning mechanism is easily blocked if too much toilet paper or other fibrous material is put down the pan.

News style

News style, journalistic style or news writing style is the prose style used for news reporting in media such as newspapers, radio and television.

News style encompasses not only vocabulary and sentence structure, but also the way in which stories present the information in terms of relative importance, tone, and intended audience. The tense used for news style articles is past tense.

News writing attempts to answer all the basic questions about any particular event—who, what, when, where and why (the Five Ws) and also often how—at the opening of the article. This form of structure is sometimes called the "inverted pyramid", to refer to the decreasing importance of information in subsequent paragraphs.

News stories also contain at least one of the following important characteristics relative to the intended audience: proximity, prominence, timeliness, human interest, oddity, or consequence.

The related term journalese is sometimes used, usually pejoratively, to refer to news-style writing. Another is headlinese.

Parts of a sail

In sailing the parts of a sail have common terminology for each corner and edge of the sail.

Triangular sails

The corners

In a triangular sail, the highest point is called the head. The halyard, the line which raises the sail, is attached to the head. The lower two corners of the sail, on either end of the foot (the bottom edge of the sail), are called the tack (forward) and clew (aft). The tack is shackled to a fixed point on the boat, such as the gooseneck in the case of a Bermuda rigged mainsail, or the deck at the base of a stay, in the case of a jib or staysail.

The clew is movable and is positioned with running rigging. A symmetrical sail may be said to have two clews.

The clew of a jib or other headsail is the free corner (not attached to any standing rigging), to which port and starboard jib sheets are attached to control the angle of the sail.

In a sail with a boom (such as a mainsail on a sloop), the clew is attached to the boom, and can often be tightened along the boom using the outhaul to adjust the sail shape.