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.

The system requires some switching of flight equipment circuits.

To set up a co-operative library system, the law requires a central book collection of 100,000 nonfiction volumes as the nucleus, and the system is organized around it.

Modern coastal artillery ( for example, Russia's " Bereg " system ) is often self propelled, ( allowing it to avoid counter-battery fire ) and fully integrated, meaning that each battery has all of the support systems that it requires ( maintenance, targeting radar, etc.

The Expansion module is designed as a pass-through device that sits on top of the console and requires no system modding.

Garbage collection is often portrayed as the opposite of manual memory management, which requires the programmer to specify which objects to deallocate and return to the memory system.

That is: in a non-deterministic GC system, if a resource or a resource like object requires manual resource management ( release / close ), and this object is used as ' part of ' another object, then the composed object will also become a resource like object that itself requires manual resource management ( release / close ).

Students of control engineering may start with a linear control system course dealing with the time and complex-s domain, which requires a thorough background in elementary mathematics and Laplace transform ( called classical control theory ).

When an application makes a request that requires a domain name lookup, such programs send a resolution request to the DNS resolver in the local operating system, which in turn handles the communications required.

A DBMS has evolved into a complex software system and its development typically requires thousands of person-years of development effort.

:: An embedded database system is a DBMS which is tightly integrated with an application software that requires access to stored data in a way that the DBMS is “ hidden ” from the application ’ s end-user and requires little or no ongoing maintenance.

Conservation of angular momentum in the Earth-Moon system requires that the angular momentum lost by the Earth due to tidal friction be transferred to the Moon, increasing its angular momentum, which means that its moment arm ( its distance from the Earth ) is increased ( for the time being about + 3. 8 cm / year ), which via Kepler's laws of planetary motion causes the Moon to revolve around the Earth at a slower rate.

To describe problem solving adequately requires a richer system of logical concepts.

It also requires clear goals with respect to future trajectories and behaviors of the system being managed.

A ' local exploit ' requires prior access to the vulnerable system and usually increases the privileges of the person running the exploit past those granted by the system administrator.

The oldest system requires the printing and signing of a receipt, with the merchant verifying the signature on the receipt against the signature on the card.

Most general purpose functional programming languages allow unrestricted recursion and are Turing complete, which makes the halting problem undecidable, can cause unsoundness of equational reasoning, and generally requires the introduction of inconsistency into the logic expressed by the language's type system.

Excessive disparities in income distribution emerging from private ownership are alleged by proponents of this system to lead to social instability that requires costly corrective measures in the form of social welfare and redistributive taxation and heavy administrative costs to administer them while weakening the incentive to work, inviting dishonesty and increasing the likelihood of tax evasion while reducing the overall efficiency of the market economy and necessitating government regulation over markets.

The giraffe requires less food than many other herbivores, because the foliage it eats has more concentrated nutrients and it has a more efficient digestive system.

Another common workaround is to run GLUT's event loop in a separate thread, although this may vary by operating system, and also may introduce synchronization issues or other problems: for example, the Mac OS X GLUT implementation requires that be run in the main thread.

The Hubble classification system rates elliptical galaxies on the basis of their ellipticity, ranging from E0, being nearly spherical, up to E7, which is highly elongated.

Hyperbolas arise in practice in many ways: as the curve representing the function in the Cartesian plane, as the appearance of a circle viewed from within it, as the path followed by the shadow of the tip of a sundial, as the shape of an open orbit ( as distinct from a closed and hence elliptical orbit ), such as the orbit of a spacecraft during a gravity assisted swing-by of a planet or more generally any spacecraft exceeding the escape velocity of the nearest planet, as the path of a single-apparition comet ( one travelling too fast to ever return to the solar system ), as the scattering trajectory of a subatomic particle ( acted on by repulsive instead of attractive forces but the principle is the same ), and so on.

First, he found that the orbits of the planets in our solar system are elliptical, not circular ( or epicyclic ), as had previously been believed, and that the Sun is not located at the center of the orbits, but rather at one focus.

Within a planetary system, planets, dwarf planets, asteroids ( a. k. a. minor planets ), comets, and space debris orbit the barycenter in elliptical orbits.

In the elliptical orbit, the center of mass of the orbiting-orbited system is at one focus of both orbits, with nothing present at the other focus.

* 499 – The Indian astronomer-mathematician, Aryabhata, in his Aryabhatiya, propounds a possibly heliocentric solar system of gravitation, and an eccentric epicyclic model of the planets, where the planets follow elliptical orbits around the Sun, and the Moon and planets shine by reflected sunlight

This light will be collected by an optical system, such as an elliptical mirror.

On Earth, the analemma appears as a figure eight, but on other solar system bodies it may be very different because of the interplay between the tilt of each body's axis and the elliptical shape of its orbit.

According to Sitchin's interpretation of Mesopotamian iconography and symbology, outlined in his 1976 book The 12th Planet and its sequels, there is an undiscovered planet beyond Neptune that follows a long, elliptical orbit, reaching the inner solar system roughly every 3, 600 years.

The function of a Weyr is to fight Thread, a spore that originates in the Oort cloud of the Rukbat solar system, carried by a planetoid referred to as the Red Star with a loose elliptical orbit.

Large elliptical galaxies typically have an extensive system of globular clusters.

If there are no tidal effects, no perturbation from other forces, and no transfer of mass from one star to the other, such a system is stable, and both stars will trace out an elliptical orbit around the center of mass of the system indefinitely.

In Epitome astronomia Copernicanae he developed a heliocentric model of the solar system in which all the planets have elliptical orbits.

Even if the discussion is limited to the solar system, the Sun is not at the geometric center of any planet's orbit, but rather approximately at one focus of the elliptical orbit.

A Heliocentric system with planets in elliptical orbits is deducible from Newton's laws of motion and gravity, but these were not published until 1687.

In the modern era, some of the modern geocentrists use a modified Tychonic system with elliptical orbits.

Stephan's Quintet, a compact group of galaxies discovered about 130 years ago and located about 280 million light years from Earth, provides a rare opportunity to observe a galaxy group in the process of evolving from an X-ray faint system dominated by spiral galaxies to a more developed system dominated by elliptical galaxies and bright X-ray emission.

Planned for launch in an elliptical polar orbit in 2013, it will carry a commercial communications system called Cascade and a scientific experiment package called ePOP ( enhanced Polar Outflow Probe ).

SBIRS is an integrated " system of systems " that will include satellites in geosynchronous orbit ( GEO ), sensors hosted on satellites in highly elliptical orbit ( HEO ), and ground-based data processing and control.

Each star orbits around a common center in a close and highly elliptical orbit, making planetary formation impossible in this system and some stellar data imprecise.

Specifically, the projection used in the system is a secant version based on an elliptical model of the Earth.