Rather, such assignments are made, as they must be, on the basis of certain overall rules and standards, representing to some extent a statistical approach to the problem, taking into account for each situation some of the variables ( e.g., power and station separations ) and averaging out others in order to achieve the balance which must be struck between protection against destructive interference and the assignment of a number of stations large enough to afford optimum radio service to the Nation.

The possibilities are few, and the total number of rules may be considerably greater.

Often, therefore, there are a number of rules having the same effect, and commonly other sets of rules as well, having the opposite effect.

Tonal morphophonemics is much more confusing to the beginning analyst than consonantal morphophonemics, even when the total number of rules is no greater.

the student will certainly want to explore more deeply into the fascinating study of immature individuals, struggling to meet their developmental needs, and at the same time trying to learn the rules of the game in the ever-expanding number of groups in which they hold membership.

After describing the manifestation of the Gospel in the Ogdoad and Hebdomad, he adds that the Basilidians have a long account of the innumerable creations and powers in the several ' stages ' of the upper world ( diastemata ), in which they speak of 365 heavens and say that " their great archon " is Abrasax, because his name contains the number 365, the number of the days in the year ; i. e. the sum of the numbers denoted by the Greek letters in ΑΒΡΑΣΑΞ according to the rules of isopsephy is 365:

The rules allow any player to count the number of shares available in the bank.

Learning time does not necessarily correlate with the number or complexity of rules ; some games, such as chess or Go, have simple rulesets while possessing profound strategies.

Although passengers rarely have cause to refer to either document, all travel is subject to the National Rail Conditions of Carriage and all tickets are valid subject to the rules set out in a number of so-called technical manuals, which are centrally produced for the network.

The rules do not specify any player positions other than goalkeeper, but a number of player specialisations have evolved.

In the end, after a number of large demutualisations, and pressure from carpetbaggers moving from one building society to another to cream off the windfalls, most of the remaining societies modified their rules of membership in the late 1990s.

Strict rules often indicate that each portion must contain a certain minimum number of cards, such as three or five.

The set of the optimal plays for all possible hands is known as " basic strategy " and is highly dependent on the specific rules, and even the number of decks used.

) As in the standard rules, a jumping move may consist of any number of a chain of hops.

The rules require consumer associations to represent an adequate number of affected parties who have suffered the same harm.

To construct a Cutter number, a cataloguer consults a Cutter table as required by the classification rules.

A number of large ISPs have configured their DNS servers to violate rules ( presumably to allow them to run on less-expensive hardware than a fully compliant resolver ), such as by disobeying TTLs, or by indicating that a domain name does not exist just because one of its name servers does not respond.

Each divisions also has rules on the number of dives in each competition.

A number of Grand Prix racing organisations had laid out rules for a World Championship before the war, but due to the suspension of racing during the conflict, the World Drivers ' Championship was not formalised until 1947.

The rules do not specify a minimum number of players for a match to take place, but most competitions have some local ruling on this, with seven players being a common minimum.

It was not only the first Frankie single to be featured on CD single, it was also the first single to not feature a cassette release-new rules limited the number items that could count toward the official charts, following the earlier ZTT excesses.

Beginning regionally again and universally by 1923, the Burnside rules led to the 3-man scrimmage being reduced to the centre alone, the number of players on the field being reduced commensurately from 14 to 12, and a snap rule and neutral zone similar to that of American football was adopted.

) Unfortunately for TSR, this version of the rules became notorious for the number of editorial mistakes, including cross-references to rules that didn't appear in the boxed set.

If a wedge-shaped coating of increasing thickness is removed from a substrate by an instrument like the Hesiometer with a knife of constant rake angle, a number of removal mechanisms are often observed which depend upon the thickness of the coating.

In this connection, it has been observed that the increasing number of Irish Catholics, priests and laity, in England, while certainly seen as good for Catholicism, is nevertheless a source of embarrassment for some of the more nationalistic English Catholics, especially when these Irishmen offer to remind their Christian brethren of this good.

It has been observed through a variety of environments that as the level of abiotic stress increases, the number of species decreases.

A number of harmful and undesired ( adverse ) effects have been observed, including lowered life expectancy, extrapyramidal effects on motor control – including akathisia ( an inability to sit still ), trembling, and muscle weakness – weight gain, decrease in brain volume ( although this is being debated, since schizophrenia, which is often treated with antipsychotics, also causes a shrinkage of brain volume ), enlarged breasts ( gynecomastia ) in men and milk discharge in men and women ( galactorrhea due to hyperprolactinaemia ), lowered white blood cell count ( agranulocytosis ), involuntary repetitive body movements ( tardive dyskinesia ), diabetes, sexual dysfunction, a return of psychosis requiring increasing the dosage due to cells producing more neurochemicals to compensate for the drugs ( tardive psychosis ), and a potential for permanent chemical dependence leading to psychosis worse than before treatment began, if the drug dosage is ever lowered or stopped ( tardive dysphrenia ).

Some birds, especially corvids and parrots, are among the most intelligent animal species ; a number of bird species have been observed manufacturing and using tools, and many social species exhibit cultural transmission of knowledge across generations.

Within the prevailing Standard Model of particle physics, the number of baryons may change in multiples of three due to the action of sphalerons, although this is rare and has not been observed under experiment.

Some grand unified theories of particle physics also predict that a single proton can decay, changing the baryon number by one ; however, this has not yet been observed under experiment.

Ninety – four different chemical elements or types of atoms based on the number of protons are observed on earth naturally, having at least one isotope that is stable or has a very long half-life.

( see figure ) The effect was observed to be independent of parameters such as the system size and impurities, and in 1981, theorist Robert Laughlin proposed a theory describing the integer states in terms of a topological invariant called the Chern number.

Clergyman Bartolomé de Las Casas observed a number of massacres initiated by the invaders as the Spanish swept over the island, notably the massacre near Camagüey of the inhabitants of Caonao.

Certain elements have no stable isotopes and are composed only of radioactive isotopes: specifically the elements without any stable isotopes are technetium ( atomic number 43 ), promethium ( atomic number 61 ), and all observed elements with atomic numbers greater than 82.

Cryptography professor Arjen Lenstra observed that " Last time, it took nine years for us to generalize from a special to a nonspecial, hard-to-factor number " and when asked whether 1024-bit RSA keys are dead, said: " The answer to that question is an unqualified yes.

Once the ray either encounters a light source, or more probably once a set limiting number of bounces has been evaluated, then the surface illumination at that final point is evaluated using techniques described above, and the changes along the way through the various bounces evaluated to estimate a value observed at the point of view.

Another difference between the low-inclination ( cold ) and high-inclination ( hot ) classical objects is the observed number of binary objects.

From the psychiatry literature, coprophagia has been observed in a small number of patients with schizophrenia, depression, and pica.

This leads to the Great Filter, which notes that since there are no observed extraterrestrial civilizations, despite the vast number of stars, then some step in the process must be acting as a filter to reduce the final value.

Einsteinium is the element with the highest atomic number which has been observed in macroscopic quantities in its pure form, and this was the common short-lived isotope einsteinium-253.

Returning to London in 1811, Jenner observed a significant number of cases of smallpox after vaccination.

This definition describes the entropy as being proportional to the natural logarithm of the number of possible microscopic configurations of the individual atoms and molecules of the system ( microstates ) which could give rise to the observed macroscopic state ( macrostate ) of the system.

The relative frequency of occurrence of an event, observed in a number of repetitions of the experiment, is a measure of the probability of that event.

Kekulé argued for his proposed structure by considering the number of isomers observed for derivatives of benzene.

At least 34 isotopes of hafnium have been observed, ranging in mass number from 153 to 186.

Around the turn from the 18th to the 19th century an increase of the number of Catholics was observed, because military personnel had been moved from West Prussia to the town.