Question: What has the characteristics of being either a drive or a loop
About the article "Table tennis", section "Flick".

Candidate passages:
When a player tries to attack a ball that has not bounced beyond the edge of the table, the player does not have the room to wind up in a "backswing".
The ball "may still be attacked", however, and the resulting shot is called a flick because the backswing is compressed into a quick wrist action.
A flick is not a single stroke and can resemble either a drive or a loop in its characteristics.
What identifies the stroke is the backswing is compressed into a short wrist flick.
Although a resonant loop may be in the shape of a circle, distorting it into a somewhat different closed shape does not greatly alter its characteristics.
For instance, the quad antenna popular in amateur radio, consists of a resonant loop (and usually additional parasitic elements) in a square shape so that it can be constructed of wire strung in between insulators.
Or the loop can be completely collapsed into a line, in which case it is termed a folded dipole.
In either case, the antenna's resonant frequency is determined by the circumference of the loop.
On the other hand a small loop antenna is used at a far lower frequency compared to its size; its radiation resistance and efficiency are instead dependent on the area enclosed by the loop (and number of turns).
For a given loop area, the length of the conductor (and thus its net loss resistance) is minimized in the case of a circle, making that shape optimum for small loops.
Although it has a superficially similar appearance, the so-called halo antenna is not technically a loop since it possesses a break in the conductor opposite the feed point.
Its characteristics are unlike that of either sort of loop antenna here described.
Also outside the scope of this article is the use of coupling coils for inductive (magnetic) transmission systems including LF and HF (rather than UHF) RFID tags and readers.
Although these do use radio frequencies, and involve the use of small loops (loosely described as "antennas" in the trade) which may be physically indistinguishable from the small loop antennas discussed here, such systems are not designed to transmit radio waves (electromagnetic waves).
They are near field systems involving alternating magnetic fields only, and may be analyzed as poorly coupled transformer windings; their performance criteria are dissimilar to radio antennas as discussed here. 
Arizona State Route 101, or Loop 101, (spoken as one-oh-one) is a semi-beltway encompassing much of the Phoenix Metropolitan Area in the United States.
It connects several suburbs of Phoenix, including Tolleson, Glendale, Peoria, Scottsdale, Mesa, Tempe, and Chandler.
Construction began in the late-1980s and was completed in 2001.
Additional general purpose lanes and a high occupancy vehicle lane (HOV) are being constructed along the eastern stretch of Loop 101 from Scottsdale to Chandler, starting at Princess Drive to Loop 202 (the Santan Freeway).
Loop 101 has interchanges with almost all area freeways, including: Loop 202, US 60, SR 51, Interstate 17, and Interstate 10 along its 61-mile (98 km) route. 
After analyzing the basic characteristics, it is necessary to bring the process of changing the mental models, or the process of learning.
Learning is a back-loop process, and feedback loops can be illustrated as: single-loop learning or double-loop learning. 
The Three Characteristics.
Throughout the Pali-canon two characteristics of all conditioned phenomena and one characteristic of all dhammas are being mentioned.
The Theravāda tradition has grouped them together.
Insight into these three characteristics is the entry to the Buddhist path:  "Anicca" (impermanence): All conditioned phenomena are subject to change, including physical characteristics, qualities, assumptions, theories, knowledge, etc.
Nothing is permanent, because, for something to be permanent, there has to be an unchanging cause behind it.
Since all causes are recursively bound together, there can be no ultimate unchanging cause.
"Dukkha" (suffering): Craving causes suffering, since what is craved is transitory, changing, and perishing.
The craving for impermanent things causes disappointment and sorrow.
There is a tendency to label practically everything in the world, as either "good," "comfortable" or "satisfying;" or "bad", "uncomfortable," and "unsatisfying."
Labeling things in terms of like and dislike creates suffering.
If one succeeds in giving up the tendency to label things, and freeing himself from the instincts that drive him towards attaining what he himself labels collectively as "liking," he attains the ultimate freedom.
The problem, the cause, the solution and the implementation, all of these are within oneself, not outside.
"Anatta" (not-self): all dhammas lack a fixed, unchanging 'essence'; there is no permanent, essential Self.
A living being is a composite of the five aggregates ("khandhas"), which is the physical forms ("rupa"), feelings or sensations ("vedana"), perception ("sanna"), mental formations ("sankhara"), and consciousness ("vinnana"), none of which can be identified as one's Self.
From the moment of conception, all entities (including all living beings) are subject to a process of continuous change.
A practitioner should, on the other hand, develop and refine his or her mind to a state so as to see through this phenomenon.
Truly understanding this counter-intuitive concept of Buddhism requires direct and personal experience.
This is given in vipassana-practice, closely watching the continuous changes in the Five Aggregates.