An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 13176 Search : far
scalable
  مرپل-پذیر   
marpel-pazir

Fr.: scalable, échelonnable, extensible, évolutif.   

The quality of a system that can be expanded or reduced in scale. Scalability allows computer equipment and software programs to be upgraded easily, rather than needing to be replaced.

scale; → -able.

scalar
  مرپلی، مرپل‌وار   
marpeli, marpelvâr

Fr.: scalaire   

Any quantity which is sufficiently defined only with its magnitude, when given in appropriate units. Compare → vector.
See also:
electric scalar potential, → scalar field, → scalar potential, → scalar processor, → scalar product, → scalar wave, → scalar-tensor theory, → tensor-vector-scalar (TeVeS) theory.

Of or pertaining to → scale.

scalar density
  چگالی ِ مرپلی   
cagâli-ye marpeli

Fr.: densité scalaire   

A → tensor density of → order 0.

scalar; → density.

scalar field
  میدان ِ مرپلی   
meydân-e marpeli

Fr.: champ scalaire   

A → field whose value at every point of space is independent of → direction and → position. Examples include → temperature distribution throughout space and → pressure distribution in a → fluid. Similarly, a → potential field, such as the Newtonian → gravitational field or the electric potential in → electrostatics are scalar fields. In quantum field theory, a scalar field is associated with → spin zero particles, such as → mesons or → bosons. Therefore, the → Higgs boson is associated with a scalar field. The → derivative of a scalar field results in a → vector field is called the → gradient. In contrast to a vector field, a scalar field is → invariant under the → rotation of the → coordinate system. The → inflation in the → early Universe is supposed to be driven by a scalar field, called the → inflaton field.

scalar; → field.

scalar perturbation
  پرتورش ِ مرپلی   
partureš-e marpeli

Fr.: perturbation scalaire   

The energy density fluctuations in the → photon-baryon plasma that bring about hotter and colder regions. This perturbation creates velocity distributions that are out of phase with the acoustic density mode. The fluid velocity from hot to cold regions causes blueshift of the photons, resulting in → quadrupole anisotropy.

scalar; → perturbation.

scalar processor
  آمایشگر ِ مرپلی   
âmâyeš:gar-e marpeli

Fr.: processeur scalaire   

Computers: A type of central processing unit in which only one operation on data is executed at a time. By contrast, in a vector processor, a single instruction operates simultaneously on multiple data items.

scalar; → processor.

scalar product
  فر‌آورد ِ مرپلی   
farâvard-e marpeli

Fr.: produit scalaire   

A multiplication of two vectors giving a scalar. The scaler product of V1 and V2 is defined by: V1.V2 = V1.V2 cos α, where V1 and V2 are the magnitudes of the vectors and α is the angle between them. Same as dot product. See also → vector product.

scalar; → product.

scalar wave
  موج ِ مرپلی   
mowj-e marpeli

Fr.: onde scalaire   

In theories of gravitation, a kind of → gravitational wave, transversal and/or longitudinal, characterized by → spin zero.

scalar; → wave.

scalar-tensor theory
  نگره‌ی ِ مرپلی-تانسوری   
negare-ye marpel-tânsori

Fr.: théorie scalaire-tensorielle   

An alternative to the standard → general relativity of gravity that contains not only the → tensor field (or → metric), but also a → scalar field. In this formalism, the → gravitational constant is considered to vary over time. As a consequence, the measured strength of the gravitational interaction is a function of time. Same as → Jordan-Brans-Dicke theory.

scalar; → tensor; → theory.

scale
  ۱) مرپل؛ ۲) مرپلیدن   
1) marpel; 2) marpelidan

Fr.: 1) échelle; 2) augmenter/réduire proportionnellement   

1a) A succession or progression of steps or degrees.
1b) A standard of measurement or estimation; point of reference by which to gauge or rate.
2) To reduce or increase according to a common proportion (often followed by down or up).

M.E., from L. scalae "ladder, stairs."

Marpel, literally "measuring stick, measuring step," on the model of Ger. Maßstab from Mass "measure" + Stab "stick, bar, pole, baton." The first element from Mod./Mid.Pers. mar "measure, count," from Av. mar- "to count, remember;" Skt. smr, smarati "to remember, he remembers;" L. memor, memoria; Gk. mermera "care," martyr "witness." The second element pel "stick, a bit of wood;" pel can also be interpreted as the contraction of pellé "staircase, ladder."

scale down
  فرود-مرپلیدن   
forud-marpelidan

Fr.:   

In computer science, to reduce the processing power of the same node/system by reducing its resources (CPU, RAM, etc.). This type of → vertical scaling is opposite to → scale up. See also → scale in, → scale out.

scale; → down.

scale factor
  کروند ِ مرپل   
karvand-e marpel

Fr.: facteur d'échelle   

Math.: A number which scales, or multiplies, some quantity. In the equation y = Cx, C is the scale factor for x. C is also the coefficient of x, and may be called the constant of proportionality of y to x.
Geometry: The ratio of any two corresponding lengths in two similar geometric figures. The ratio of areas of two similar figures is the square of the scale factor.

scale; → factor.

scale height
  بلندی ِ مرپل   
bolandi-ye marpel

Fr.: hauteur d'échelle   

The height within which some parameter, such as pressure or density, decreases by a factor of e. For example, an atmospheric scale height of 100 km means that the value at 100 km is 1/e the value at the surface.

scale; → height.

scale in
  درون-مرپلیدن   
darun-marpelidan

Fr.:   

In computer science, to reduce the number of nodes (servers), as opposed to → scale out. Scale-in is a type of → horizontal scaling. See also → scale up, → scale down.

scale; → in.

scale out
  برون-مرپلیدن   
borun-marpelidan

Fr.:   

In computer science, to upgrade a system by increasing the number of nodes. For example, instead of going from a CPU of X and memory of Y to a CPU with 4X and 4Y memory, use 4 machines with CPU of X and memory of Y. This is a type of → horizontal scaling. See also → scale in, → scale up, → scale down.

scale; → out.

scale up
  فراز-مرپلیدن   
farâz-marpelidan

Fr.:   

In computer science, to increase the processing power of the same node/system by increasing its resources (CPU, RAM, etc.). This is a type of → vertical scaling opposite to → scale down. For example, instead of a machine with a CPU running at speed of X and having Y gigabytes of memory, use a machine with a CPU running at speed of 4X and a memory of 4Y gigabytes. See also → scale in, → scale out.

scale; → up.

scalene triangle
  سه‌بر ِ ناجور-پهلو   
sebar-e nâjur-pahlu

Fr.: triangle scalène   

A triangle no two sides of which are equal.

From L.L. scalenus, from Gk. skalenos "uneven, unequal, rough," from skallein "chop, hoe," related to skolios "crooked," from PIE base *(s)qel- "crooked, curved, bent;" → triangle.

Sebar, → triangle; nâjur-pahlu "dissimilar sides," from nâjur "dissimilar, ill-matched" + pahlu "side, flank" (Mid.Pers. pahlug "side, rib," Av. pərəsu- "rib," Ossetic fars "side, flank," cf. Skt. párśu- "rib," Lith. piršys (pl.) "horse breast").

scaler
  مرپل‌گر   
marpelgar

Fr.:   

An electronic circuit devised to give a single pulse after a prescribed number of input pulses have been received.

Agent noun from → scale.

scaling
  مرپلش   
marpeleš

Fr.:   

1) Altering original variable values (according to a specific function or an algorithm) into a range that meet particular criteria.
2) The ability of a system, or process, to handle a growing load in regards to capacity. It has two types: → vertical scaling and → horizontal scaling.

scale; → -ing.

scalp
  کلر   
keler

Fr.: cuir chevelu   

The part of the head where the hair grows from.

M.E., perhaps from O.Norse skālpr "sheath," related to O.Norse skalli "a bald head," from PIE root *(s)ker- "to cut," → bark.

Keler, from Zâhedân Baloci keler "scalp," cognate with kâlun, → bark.

<< < -es -it -sc 201 951 abe abs abs aca acc acc aco act ada adh ado aer aft air Alf alg alk alp Alt alt amb ana And ang ani ann ant ant ant apo app app Apu arc arg Arn art ass ast ast ast atm ato att aur aut avo azi bac bal bar bar bat Bea Bel bet bia big bin bio Bir bla bla blo Blu bol Boo bou box bre Bri bro bur cal cal Can cap car Car cat cau cel cen cen cha Cha cha che Chi chr cir cir civ cla clo clo CMB coa coe coh col col col com com com com com com com com Com con con con con con con con con con con con con coo cor cor cor Cos cos cos cou cou cra cri cro cry cul cur cyc D l dar dat day dea dec dec dec def def deg Del Den dep der det deu dew dic dif dif dil dip dir dis dis dis dis dis diu dog Dop dou Dra Dsc dus dwa dyn Dys Ear ecc eco edg egg Ein Ela ele ele ele ele ell eme emp enc eng ent epi equ equ equ eru eth Eur eve exa exc exe exi exo exp ext ext ext fab fai Fan fea fem fer fie fil fir fir fla fli flu foc for for for fra fre fre fri fun fuz gal gal gal Gam gau Gau gen geo geo geo geo Gib glo gov gra gra gra gra gre gro Gui H-a hal Ham har Hay hea hei hel Hel her het hie hig hoa hom hor hot Hub Hug hur hyd hyd hyl hyp ice ide ima ima imp imp inc inc ind ine inf inf inf ing inn ins ins int int int int int int int int inv inv ion iro Isl iso iso Jab jet Jov Jup Kar Kep kil Kip Kra Lag Lam Lan Lar las law lea Leg Leo lev lig lim lin lin lin lit loc loc log Lor low lum lun lun Lym Mac mag mag mag mag mag mai Mal map mas mas mat Mau mea mea med Men mer Mes Met met mic mic Mie mil min Mir mix mod mol mom Moo mor mov mul mur n-b nan nat nea neg Ner neu new New NGC noc nom non non nor nor nuc nuc nul nut obj obl obs occ oct off old one ope opp opt opt orb ord org Ori osc oth ove Owl P-s Pal par par par par Pas pat pec pen per per per per per Pha pha pho pho pho phy pie pix Pla pla pla pla Pli Poi pol pol pol pol por pos pos pow pre pre pre pre pri pri pri pro pro pro pro pro pro pro pub pul pyc qua qua qua qua qui rad rad rad rad rad rad rai ran rar Ray rea Rea rec rec red red ref ref reg rel rel rel ren res res res res ret rev Ric rig rin roc roo rot rot rur S5- Sal sat sca sca Sch sci Scu sec sec sed sel sel sem seq set sha she sho sid sie sil sim sin sit sky slo sno sod sol sol sol sol son sou spa spa spe spe spe spe sph spi spo squ sta sta sta sta ste ste ste Sti sto str str sub sub sub sul sup sup sup sup sur sur syl syn sys tal Tay tel ten ter tex the the the the Tho thr tid tim Tit too Tor tra tra Tra tra Tra tri Tri tru tub tur two Typ ult ult unc uni uni uni upl ura uti val var vec vel ver Ver vie vir vis vis vol W-R war wav wav wea Wei wha wid win WN3 Wol wri xen yok zen zij > >>