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Page "Domain Name System" ¶ 53
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value and field
Field shifts were derived from the mean value of the resonance line, defined as the field about which the first moment is zero.
People today are aware of the value of orthodontics, and as a result there are more practitioners in the field.
If X is a Banach space and K is the underlying field ( either the real or the complex numbers ), then K is itself a Banach space ( using the absolute value as norm ) and we can define the continuous dual space as X ′ = B ( X, K ), the space of continuous linear maps into K.
BCS theory relates the value of the critical field at zero temperature to the value of the transition temperature and the density of states at the Fermi energy.
* In a vector field describing the linear velocities of each part of a rotating disk, the curl has the same value at all points.
However, once the applied electric field approaches the breakdown value, free electrons become sufficiently accelerated by the electric field to create additional free electrons by colliding, and ionizing, neutral gas atoms or molecules in a process called avalanche breakdown.
The Casimir effect can be understood by the idea that the presence of conducting metals and dielectrics alters the vacuum expectation value of the energy of the second quantized electromagnetic field.
Therefore the divergence of the velocity field in that region would have a positive value, as the region is a source.
A record in the second file includes a key and pointers to records in the first file where the inversion field has the value of the key.
An electric field has the special property that it is conservative, which means that the path taken by the test charge is irrelevant: all paths between two specified points expend the same energy, and thus a unique value for potential difference may be stated.
Another version of Hahn – Banach theorem states that if V is a vector space over the scalar field K ( either the real numbers R or the complex numbers C ), if is a seminorm, and is a K-linear functional on a K-linear subspace U of V which is dominated by on U in absolute value,
The Hall parameter value increases with the magnetic field strength.
When both the DSAP and the SSAP are set to the hexadecimal value 0xAA ( or 0xAB, if the low-order bit of the field is set ), the SNAP service is requested.
IEEE 802. 3 is an exception ; Ethernet originally used Ethernet II framing, with a 2-octet type field containing an EtherType value, and no 802. 2 header, but the original IEEE 802. 3 specification used a framing wherein the 2-octet field following the 6-octet destination and source MAC addresses contained a frame length, with an 802. 2 LLC header following the length field.
A non-zero element of an ordered field F is infinitesimal if and only if its absolute value is smaller than any element of F of the form 1 / n, for n a standard natural number.
* Grad ( gradient ), ( with operator symbol ∇) assigns a vector at every point in a scalar field that points in the direction of greatest rate of change of that field and whose norm measures the absolute value of that greatest rate of change.
The Congregation for the Doctrine of the Faith issued on 20 October 1980 an instruction on infant baptism, whose purpose was " to recall the principal points of doctrine in this field which justify the Church's constant practice down the centuries and demonstrate its permanent value in spite of the difficulties raised today ".
He found an essential clue in a 1924 paper by Edmund C. Stoner which pointed out that for a given value of the principal quantum number ( n ), the number of energy levels of a single electron in the alkali metal spectra in an external magnetic field, where all degenerate energy levels are separated, is equal to the number of electrons in the closed shell of the noble gases for the same value of n. This led Pauli to realize that the complicated numbers of electrons in closed shells can be reduced to the simple rule of one per state, if the electron states are defined using four quantum numbers.

value and record
This value also indicates the meaning of a data element for a given object ( or record ) type.
The time for which a resolver caches a DNS response is determined by a value called the time to live ( TTL ) associated with every record.
A record is a value that contains other values, typically in fixed number and sequence and typically indexed by names.
Contrast with a record, which could be defined to contain a float and an integer ; whereas, in a union, there is only one value at a time.
When storing records in a large unsorted file, one may use a hash function to map each record to an index into a table T, and collect in each bucket T a list of the numbers of all records with the same hash value i. Once the table is complete, any two duplicate records will end up in the same bucket.
The value of Mexican cotton and apparel exports to the U. S. grew from $ 3 billion in 1995 to $ 8. 4 billion in 2002, a record high of $ 9. 4 billion in 2000.
Scholars have described their methods as subjective and devoid of any evidential value, saying they use a " double standard ", " consistently distort and misrepresent the historical record ", " neglect to provide necessary context " and calling some of their arguments " outright fabrication ".
While ATMs ( as well as the remote memory systems discussed below ) use the card merely to identify the associated account and record changes in a central database, stored value systems make a physical alteration to the card to reflect the new balance after a call.
A TTL value of 86400 would mean that, if a DNS record was changed on the authoritative nameserver, DNS servers around the world could still be showing the old value from their cache for up to 24 hours after the change.
TTL values are " per record " and setting this value on specific records is normally honored automatically by all standard DNS systems world-wide.
The number and value of deals hit a new record in 2010.
After stating the assessment of the manor, the record sets forth the amount of arable land, and the number of plough teams ( each reckoned at eight oxen ) available for working it, with the additional number ( if any ) that might be employed ; then the river-meadows, woodland, pasture, fisheries ( i. e. fishing weirs ), water-mills, salt-pans ( if by the sea ) and other subsidiary sources of revenue ; the peasants are enumerated in their several classes ; and finally the annual value of the whole, past and present, is roughly estimated.
Stothard's images are still of value as a record of the tapestry as it was before 19th-century restoration.
As you value liberty and the blessings of peace blot out from the page of your history a record so fatal to their security as this ordinance will become if it be obeyed.
With a high foreign debt ( originally $ 5. 7 billion at 1998 net present value ) and a good track record on economic reform, Mozambique was the first African country to receive debt relief under the initial Heavily Indebted Poor Country ( HIPC ) Initiative.
For a brief period in late December 2004, asteroid ( then known only by its provisional designation ) held the record for Palermo scale values, with a value of 1. 10 for a possible collision in the year 2029.
A mail exchanger record ( MX record ) is a type of resource record in the Domain Name System that specifies a mail server responsible for accepting email messages on behalf of a recipient's domain, and a preference value used to prioritize mail delivery if multiple mail servers are available.
The characteristic payload information of an MX record is the fully qualified domain name of a mail host and a preference value.
Games recorded using the Portable Game Notation ( PGN ) can record the initial position using Forsyth – Edwards Notation ( FEN ), as the value of the " FEN " tag.
The second way to decrease the uncertainty of the extreme event is to forecast a value which is less than the maximum observed value ( e. g. the maximum rainfall event on record is 5. 25 inches / hour, so the 100-year storm event should be less than this ).

value and TTL
Frequently starting with a value like 128 ( Windows ) or 64 ( Linux ), routers decrement this and discard a packet when the TTL value has reached zero, returning the ICMP error message ICMP Time Exceeded.
Traceroute works by increasing the TTL value of each successive set of packets sent.
The maximum TTL value is 255, the maximum value of a single octet.
An older common TTL value for DNS was 86400 seconds, which is 24 hours.
The maximum value of this current is about 1. 6 mA for a standard TTL gate.
Waiting for a trigger, starting the ADC, looking up the time, waiting for the ADC to finish, move value to RAM, switch multiplexer, get TTL input, let DAC proceed with voltage ramp.
The use of a TTL value of 0 will still overwrite the users local resolver cache which may cause conflicts with previously authenticated services.
The continuous process of monitoring, analyzing, redesigning and implementing is used to intensify TTL value production as conditions change and new opportunities emerge.
$ TTL 1h ; default expiration time of all resource records without their own TTL value

0.684 seconds.