half hourly - definizione. Che cos'è half hourly
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  3. half hourly

Cosa (chi) è half hourly - definizione

NUMBER OF METEORS A SINGLE OBSERVER WOULD SEE IN AN HOUR OF PEAK ACTIVITY FOR THE METEOR SHOWER
Zenith Hourly Rate; Zenith hourly rate; Zenithal Hourly Rate
  • All-sky view of the 1998 [[Leonids]] shower. 156 meteors were captured in this 4-hour image.

half-mast         
  • The [[Australian White Ensign]] flying at half-mast. In accordance with British [[tradition]], the flag is flying only one flag's width below the top of the pole.
  • Franklin Roosevelt]]
  • Capitol Building]] flies at half-staff in honor of President [[Ronald Reagan]], 2004
  • Brazilian flag]] flying at half-mast beside the [[Mercosul]] flag in front of the [[National Congress of Brazil]] in memory of the victims of the [[Chapecoense crash]] on 29 November 2016
  • Vietnam flag at half-mast in General Vo Nguyen Giap's funeral
  • Presidential Office Building]]
  • Hong Kong SAR flag flown at half mast
  • The flag of Saudi Arabia is never flown at half-mast.
  • train detrailment and explosion of Lac Mégantic, Québec]].
  • Thai national flag flown at half mast at [[Assumption College (Thailand)]] Bangkok during the mourning of the [[King Bhumibol]]
  • Elizabeth II]]'s death.
  • Joseph Shepard Building]] in [[Toronto]], following the death of [[Prince Philip, Duke of Edinburgh]], 2021
  • Black ribbons indicate mourning on banners that cannot be lowered to half-mast.
  • Flag at half-mast in [[Żebbuġ]], [[Malta]] for [[Good Friday]] 2014
  • Groningen]], Netherlands
  • Flags of Singapore outside [[The Fullerton Hotel Singapore]] were flown at half-mast to mark the death of [[Lee Kuan Yew]].
  • Chinese flag at half-mast to mark to mourn for the victims of the [[2008 Sichuan earthquake]]
  • Sir Edmund Hillary]]
  • Norwegian flag at half-staff to mourn the victims of the 2011 Norway attacks
  • Flag of Pahang]] is flown at half-mast at the [[Chin Swee Caves Temple]] as a mark of respect to the late Sultan [[Ahmad Shah of Pahang]]. The flag of Malaysia and Selangor are not at half-mast as a result of different mourning periods.
  • Philippine flag at half-staff at the Rizal Park.
  • Flag of Sweden at half-mast
  • Indian flag flown at half-mast at the Red Fort
  • Turkish flags]] at half mast after the [[2016 Atatürk Airport attack]]
  • The United States flag flying at half-staff in memorial of the [[September 11 attacks]] in New York City, Sep. 11 2014.
  • The [[Union Flag]] flying at half-mast, following the death of [[Prince Philip, Duke of Edinburgh]], 2021
  • flag of the Holy See]] flying at half-mast the day after the death of [[Pope John Paul II]]
  • Flags in Israel at half mast on the eve of [[Yom HaShoah]]
FLAG FLYING BELOW THE SUMMIT OF A SHIP MAST, A POLE ON LAND, OR A POLE ON A BUILDING
Half mast; Half staff; Half-Staff; Half-Mast; Halfmast; Half-staff; Proclamation 3044
If a flag is flying at half-mast, it is flying from the middle of the pole, not the top, to show respect and sorrow for someone who has just died.
PHRASE: usu PHR after v
half mast         
  • The [[Australian White Ensign]] flying at half-mast. In accordance with British [[tradition]], the flag is flying only one flag's width below the top of the pole.
  • Franklin Roosevelt]]
  • Capitol Building]] flies at half-staff in honor of President [[Ronald Reagan]], 2004
  • Brazilian flag]] flying at half-mast beside the [[Mercosul]] flag in front of the [[National Congress of Brazil]] in memory of the victims of the [[Chapecoense crash]] on 29 November 2016
  • Vietnam flag at half-mast in General Vo Nguyen Giap's funeral
  • Presidential Office Building]]
  • Hong Kong SAR flag flown at half mast
  • The flag of Saudi Arabia is never flown at half-mast.
  • train detrailment and explosion of Lac Mégantic, Québec]].
  • Thai national flag flown at half mast at [[Assumption College (Thailand)]] Bangkok during the mourning of the [[King Bhumibol]]
  • Elizabeth II]]'s death.
  • Joseph Shepard Building]] in [[Toronto]], following the death of [[Prince Philip, Duke of Edinburgh]], 2021
  • Black ribbons indicate mourning on banners that cannot be lowered to half-mast.
  • Flag at half-mast in [[Żebbuġ]], [[Malta]] for [[Good Friday]] 2014
  • Groningen]], Netherlands
  • Flags of Singapore outside [[The Fullerton Hotel Singapore]] were flown at half-mast to mark the death of [[Lee Kuan Yew]].
  • Chinese flag at half-mast to mark to mourn for the victims of the [[2008 Sichuan earthquake]]
  • Sir Edmund Hillary]]
  • Norwegian flag at half-staff to mourn the victims of the 2011 Norway attacks
  • Flag of Pahang]] is flown at half-mast at the [[Chin Swee Caves Temple]] as a mark of respect to the late Sultan [[Ahmad Shah of Pahang]]. The flag of Malaysia and Selangor are not at half-mast as a result of different mourning periods.
  • Philippine flag at half-staff at the Rizal Park.
  • Flag of Sweden at half-mast
  • Indian flag flown at half-mast at the Red Fort
  • Turkish flags]] at half mast after the [[2016 Atatürk Airport attack]]
  • The United States flag flying at half-staff in memorial of the [[September 11 attacks]] in New York City, Sep. 11 2014.
  • The [[Union Flag]] flying at half-mast, following the death of [[Prince Philip, Duke of Edinburgh]], 2021
  • flag of the Holy See]] flying at half-mast the day after the death of [[Pope John Paul II]]
  • Flags in Israel at half mast on the eve of [[Yom HaShoah]]
FLAG FLYING BELOW THE SUMMIT OF A SHIP MAST, A POLE ON LAND, OR A POLE ON A BUILDING
Half mast; Half staff; Half-Staff; Half-Mast; Halfmast; Half-staff; Proclamation 3044
¦ noun
1. a position of a flag halfway down its mast, as a mark of respect for a person who has died.
2. humorous a position lower than normal, especially for clothes.
Half-halt         
AN AID WITH THE OBJECT OF INCREASING THE ATTENTION AND BALANCE OF THE HORSE.
Half halt
The half-halt is a specific riding aid given by an equestrian to his horse, in which the driving aids and restraining aids are applied in quick succession. It is sometimes thought of as an "almost halt," asking the horse to prepare to halt in balance, before pushing it onward to continue in its gait.
https://en.wikipedia.org/wiki/Half-halt

Wikipedia

Zenithal hourly rate

In astronomy, the zenithal hourly rate (ZHR) of a meteor shower is the number of meteors a single observer would see in an hour of peak activity if it was at the zenith, assuming the seeing conditions are excellent (when and where stars with apparent magnitudes up to 6.5 are visible to the naked eye). The rate that can effectively be seen is nearly always lower and decreases the closer the radiant is to the horizon.

The formula to calculate the ZHR is:

Z H R = H R ¯ ⋅ F ⋅ r 6.5 − l m sin ⁡ ( h R ) {\displaystyle ZHR={\cfrac {{\overline {HR}}\cdot F\cdot r^{6.5-lm}}{\sin(h_{R})}}}

where

H R ¯ = N T e f f {\displaystyle {\overline {HR}}={\cfrac {N}{T_{eff}}}}

represents the hourly rate of the observer. N is the number of meteors observed, and Teff is the effective observation time of the observer.

Example: If the observer detected 12 meteors in 15 minutes, their hourly rate was 48 (12 divided by 0.25 hours).

F = 1 1 − k {\displaystyle F={\cfrac {1}{1-k}}}

This represents the field of view correction factor, where k is the percentage of the observer's field of view which is obstructed (by clouds, for example).

Example: If 20% of the observer's field of view were covered by clouds, k would be 0.2 and F would be 1.25. The observer should have seen 25% more meteors, therefore multiply by F = 1.25.

r 6.5 − l m {\displaystyle r^{6.5-lm}}

This represents the limiting magnitude correction factor (Population index). For every change of 1 magnitude in the limiting magnitude of the observer, the number of meteors observed changes by a factor of r. Therefore, this must be taken into account.

Example: If r is 2, and the observer's limiting magnitude is 5.5, the hourly rate is multiplied by 2 (2 to the power 6.5–5.5), to know how many meteors they would have seen if their limiting magnitude was 6.5.

sin ⁡ ( h R ) {\displaystyle \sin(h_{R})}

This represents the correction factor for the altitude of the radiant above the horizon (hR). The number of meteors seen by an observer changes as the sine of the radiant height.

Example: If the radiant was at an average altitude of 30° during the observation period, the observer's hourly rate will need to be divided by 0.5 (sin 30°) to know how many meteors they would have seen if the radiant was at the zenith.

https://en.wikipedia.org/wiki/Zenithal hourly rate
Esempi dal corpus di testo per half hourly
1. Her treatment includes taking 16 tablets a day and having two half–hourly sessions of physiotherapy.
2. Milenov said his body was discovered during a routine half–hourly monitoring of his cell.
3. His body was discovered during a routine half–hourly monitoring of his cell, said tribunal spokeswoman Alexandra Milenov.
4. Arthur Leathley of Virgin Trains says there are now half–hourly services on the route on a journey taking two hours and 15 minutes.
5. Since he and his writing partner, Stephen Merchant, and the hapless producer, Karl Pilkington, began producing the half–hourly podcast for download on the Guardian‘s website in December, 2.'m downloads have been made – an average of 2'4,755 per episode.
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