This requires sophisticated research into children's cognitive development, and the learning sciences draws heavily on psychological studies of cognitive development ( e. g., Siegler, 1998 ).

Supersonic airliners ( e. g. Concorde ) are no longer in use largely because flight at supersonic speed creates a sonic boom which is prohibited in most heavily populated areas, and because of the much higher consumption of fuel supersonic flight requires.

Their use requires that the vehicle itself be fairly heavily armoured to protect the vehicle and its crew from the exploding ERA ;.

The game requires the player to play as the humans, but they can be heavily modified.

While knowledge worker roles overlap heavily with professions that require college degrees, the comprehensive nature of knowledge work in today's connected workplace requires virtually all workers to obtain these skills at some level.

Someone who is heavily involved in a situation that requires courage, skill, or tenacity ( as opposed to someone sitting on the sidelines and watching ), is sometimes referred to as " the man in the arena.

Acquiring a CDL requires a skills test ( pre-trip inspection and driving test ), and knowledge test ( written ) covering the unique handling qualities of driving a large, heavily loaded commercial vehicle, and the mechanical systems required to operate such a vehicle ( air brakes, suspension, cargo securement, et al.

This requires a skilled nozzleman, especially in the case of thick or heavily reinforced sections.

For transmission levels of voltage ( high voltages over 66 kV ), often switchgear will be mounted outdoors and insulated by air, although this requires a large amount of space.

The final phase requires sailors to enter the radiation-filled reactor room to weld the pipes together.

The lower chamber requires separate biogas vents and pipes for the removal of digested sludge, typically after 6-9 months of digestion.

Structurally, a wet room requires the bathroom to have a gradient or slope towards a drain hole, and a foul air trap connecting the floor to the waste pipes.

Though the installation requirements of each of shower will differ, in general the installation of a shower requires the laying of several water transportation pipes, including a pipe for hot water and for cold water, and a drainage pipe.

Steel pipes and storage vessels used to store and transmit both gaseous and liquid oxygen will act as a fuel ; and therefore the design and manufacture of systems requires special training to ensure that ignition sources are minimized.

The scheme that Dr Bradfield proposed in 1938 requires large pipes, tunnels, pumps and dams.

This gives the steam pipes a shoulder instead of being straight, and requires smaller domes with a flatter top to fit JŽ's loading gauge.

( 1 ) crimping tool to squeeze a metal band to join a pipe and a fitting ( 2 ) compression coupling joining two 1 / 2 inch pipes ( copper or PEX ) ( 3 ) " T-joint " to connect 3 / 4 ", 3 / 4 ", and 1 / 2 " pipes ( 4 ) Copper-to-PEX 1 / 2 " connection ( requires soldering ) ( 5 and 6 ) tools to undo PEX connections ( 7 ) crimp rings to squeeze metal band to connect PEX to a fixture ( 8 ) PEX tube cutter.

Schweitzer seems, in fact, to acquire for himself a burden of sin, not bequeathed by Adam, but accumulated in the inevitable judgments which life requires of him as between greater and lesser responsibilities.

And to do this requires first of all the kind of information about people which is provided by the scientists in industrial anthropology and consumer research, who, for example, tell Courtenay that three days is the `` optimum priming period for a closed social circuit to be triggered with a catalytic cue-phrase '' -- which means that an effective propaganda technique is to send an idea into circulation and then three days later reinforce or undermine it.

The first possibility requires that there be a line through P which meets **zg in Af points ; ;

the second requires that there be a line through P which meets **zg in Af points.

Destruction of the enemy's building and base complex, however, requires attacks on enemy territory, which is possible only in event of all-out hostilities.

An electrostatic system suffers generally from image plane curvature leading to defocusing in the peripheral image region if a flat viewing screen ( or interstage coupler ) is utilized, while a magnetic system requires accurate adjustment of the solenoid, which is heavy and bulky.

Sir Julian Huxley in his book Uniqueness Of Man makes the novel point that just as man is unique in being the only animal which requires a long period of infancy and childhood under family protection, so is he the only animal who has a long period after the decline of his procreativity.

The technological, operative approach, which she calls extraverted, and the mystic, contemplative, psychological one, which she calls introverted are not mutually exclusive, but complementary instead, as meditation requires practice in the real world, and conversely.

The use of multi-defined words requires the author or speaker to clarify their context, and sometimes elaborate on their specific intended meaning ( in which case, a less ambiguous term should have been used ).

The debate is interesting enough, however, that it is considered of note when a theorem in ZFC ( ZF plus AC ) is logically equivalent ( with just the ZF axioms ) to the axiom of choice, and mathematicians look for results that require the axiom of choice to be false, though this type of deduction is less common than the type which requires the axiom of choice to be true.

When infants are taught to sign, parents are able to converse with them at a developmental stage when they are not yet capable of producing vocal speech, which requires fine control of both breathing and the vocal tract.

According to Steven H Silver, alternate history requires three things: 1 ) the story must have a point of divergence from the history of our world prior to the time at which the author is writing, 2 ) a change that would alter history as it is known, and 3 ) an examination of the ramifications of that change.

This misconception is often directed at the Arminian possibility of apostasy, which critics maintain requires continual good works to achieve final salvation.

The lawyer Thomas Egerton was praised through the anagram gestat honorem ; the physician George Ent took the anagrammatic motto genio surget, which requires his first name as ".

This is why a high compression engine requires fuels specially formulated to not self-ignite ( which would cause engine knocking when operated under these conditions of temperature and pressure ), or that a supercharger and intercooler to provide a lower temperature at the same pressure would be advantageous.

Every field has an algebraic extension which is algebraically closed ( called its algebraic closure ), but proving this in general requires some form of the axiom of choice.

This inhibition of MAO-A allows DMT to diffuse unmetabolized past the membranes in the stomach and small intestine, and eventually cross the blood – brain barrier ( which, by itself, requires no MAO-A inhibition ) to activate receptor sites in the brain.

This requires developing new faculties of objective spiritual perception, which Steiner maintained was possible for humanity today.

The individual's karmic condition eventually leads to a choice of parents, physical body, disposition, and capacities that provide the challenges and opportunities that further development requires, which includes karmically chosen tasks for the future life.

In the preface, Abba Mari explains his object in collecting the correspondence ; and in the treatise which follows he shows that the study of philosophy, useful in itself as a help toward the acquisition of the knowledge of God, requires great caution, lest we be misled by the Aristotelian philosophy or its false interpretation, as regards the principles of creation ex nihilo and divine individual providence.

Rotation about the carbon-carbon double bond is restricted because it involves breaking the pi bond, which requires a large amount of energy ( 264 kJ / mol in ethylene ).

This portability feature, however, requires a portable television, which was extremely rare in the early 1980s.

Their main disadvantage is the distortion of the flow itself by the structure supporting the transducers, which requires a correction based upon wind tunnel measurements to minimize the effect.

Since the provision of skywave service requires adequate freedom from interference, only class 1, stations are capable of rendering skywave service.

For the making of selections on the basis of excellence requires that any foundation making the selections shall have available the judgments of a corps of advisors whose judgments are known to be good: such judgments can be known to be good only by the records of those selected, by records made subsequent to their selection over considerable periods of time.

Signs are meant to convey a message, and in most cases, this requires words and letters.

Examples include Web accessibility a set of guidelines and two accessible web portals designed for people developing reading skills are peepo. com — try typing a letter with your keyboard for more — and peepo. co. uk with enhanced graphics, unique style controls and improved interactivity ( requires an SVG supported browser ).

This section requires that all telecommunications companies in the U. S. take steps to ensure functionally equivalent services for consumers with disabilities, notably those who are deaf or hard of hearing and those with speech impairments.

There are complications, and the technique requires careful preparation and a level of skill and experience above that required for a single anchor.

Furthermore, the crime of assault generally requires that both the perpetrator and the victim of an assault are human.

This specialized hands-on requires Alexander teachers to demonstrate on themselves the improved physical coordination they are communicating to the student.

* Extracting one file requires decompressing all the files that are before the file in the archive.

Though authors are not allowed to charge for access to copies of their work, downloading a copy from the ACM site requires a paid subscription.

Abstraction uses a strategy of simplification, wherein formerly concrete details are left ambiguous, vague, or undefined ; thus effective communication about things in the abstract requires an intuitive or common experience between the communicator and the communication recipient.

Also, this active attack probably requires custom hardware, since most commercially available Bluetooth devices are not capable of the timing necessary.

This process is not quite the opposite of glycolysis, and actually requires three times the amount of energy gained from glycolysis ( six molecules of ATP are used, compared to the two gained in glycolysis ).

Because a bipolar diagnosis requires a manic or hypomanic episode, many patients are initially diagnosed and treated as having major depression.

Duplex embossing requires lining up the dots so they do not overlap ( called " interpoint " because the points on the other side are placed in between the points on the first side ).

The law requires companies listed on the major stock exchanges ( NYSE, NASDAQ ) to have a majority of independent directors -- directors who are not otherwise employed by the firm or in a business relationship with it.

Naturally, accomplishing this requires additional circuitry, so pipelined processors are more complex than subscalar ones ( though not very significantly so ).

Antipsychotics should be used with care as they can worsen catatonia and are the cause of neuroleptic malignant syndrome, a dangerous condition that can mimic catatonia and requires immediate discontinuation of the antipsychotic.

String theory requires that, in addition to the three spatial dimensions we observe, there exist additional dimensions that are curled up or compactified ( see also Kaluza-Klein theory ).

This microwave network has however never been used, since the equipment requires electricity for the repeaters that are located every.

In June 2012 the Cypriot finance minister Vassos Shiarly stated that the European Central Bank, European commission and IMF officials are to carry out an in-depth investigation into Cyprus ' economy and banking sector to assess the level of funding it requires.