) During the initial collapse, this pre-main-sequence star generates energy through gravitational contraction.

During a contraction, these muscles contract causing shortening of the upper segment and drawing upwards of the lower segment, in a gradual expulsive motion.

During contraction of the ventricular myocardium ( systole ), the subendocardial coronary vessels ( the vessels that enter the myocardium ) are compressed due to the high intraventricular pressures.

During Margaret Thatcher's contraction of the coal industry, six pits within a two mile ( 3 km ) radius of the city centre were closed between 1979 and 1983.

During vomiting the propulsion of food up the esophagus and out the mouth comes from contraction of the abdominal muscles ; peristalsis does not reverse in the esophagus.

During the 1930s, the U. S. and the rest of the world experienced a severe economic contraction that is now called the Great Depression.

* During accommodation, the parasympathetic nervous system causes constriction of the pupil and contraction of the ciliary muscle to the lens, allowing for closer vision.

During the 1980s, migratory Japanese sardine was one of the most abundant fish in the summer and the main commercial species, but the fishery collapsed and by 1993 no sardines were reported caught leading to significant economic contraction in the few settlements on the islands.

During contraction, there is a spatial reorganization of the contractile machinery to optimize force development.

During the nineties, countries like Mexico, Argentina, Malaysia, Turkey, Colombia, Indonesia, Korea and Peru all experienced boom – bust cycles with the consequent collapse in GDP, consumption, non-tradable output sector contraction, capital flow reversals, limited or costly access to capital markets and sharp real exchange rate fluctuations.

During intense muscle contraction the ion pumps that maintain homeostasis of these ions are inactivated and this ( with other ion related disruption ) causes ionic disturbances.

During the ventricular contraction portion of the cardiac cycle, the Purkinje fibers carry the contraction impulse from both the left and right bundle branch to the myocardium of the ventricles.

During the era of route contraction from 1940 to about 1975 the Franklin Avenue Shuttle, as it is now known, seemed a prime candidate for abandonment ; its physical structure had been allowed to deteriorate and its service steadily curtailed.

During ventricular contraction, the wave of depolarization moves from endocardial to epicardial surface.

During this phase, the male urethral sphincter contracts ( so as to prevent urine from mixing with semen, and guard against retrograde ejaculation ) and muscles at the base of the penis begin a steady rhythmic contraction.

During ventricular contraction, or systole, some of the blood from the left ventricle leaks into the right ventricle, passes through the lungs and reenters the left ventricle via the pulmonary veins and left atrium.

During contraction of muscle, rapidly cycling crossbridges form between activated actin and phosphorylated myosin, generating force.

During a concentric contraction, a muscle is stimulated to contract according to the sliding filament mechanism.

During an eccentric contraction, the muscle elongates while under tension due to an opposing force being greater than the force generated by the muscle.

During an eccentric contraction of the biceps muscle, the elbow starts the movement while bent and then straightens as the hand moves away from the shoulder.

During an eccentric contraction of the triceps muscle, the elbow starts the movement straight and then bends as the hand moves towards the shoulder.

During a concentric contraction, muscle fibers slide across each other, pulling the Z-lines together.

During an eccentric contraction, the filaments slide past each other the opposite way, though the actual movement of the myosin heads during an eccentric contraction is not known.

) During the collapse, neutrons are formed by the capture of electrons by protons in the process of electron capture, leading to the emission of neutrinos .< sup >, pp. 1046 – 1047 .</ sup > The decrease in gravitational potential energy of the collapsing core releases a large amount of energy which is on the order of 10 < sup > 46 </ sup > joules ( 100 foes ).

During the two to three-year core training programme, doctors will sit the Membership of the Royal College of Surgeons ( MRCS ) examination.

During composers Beethoven and Felix Mendelssohn's time, the orchestra was composed of a fairly standard core of instruments which was very rarely modified.

During Star Trek Generations, the Enterprise was lost in 2371 after an attack by a renegade Klingon Bird-of-Prey ( commanded by the Duras sisters ) caused extensive damage, leading to a warp core breach.

; Cap skis: During the 1980s, Bucky Kashiwa developed a new construction technique using a rolled stainless steel sheet forming three sides of a torsion box over a wooden core, with the base of the ski forming the bottom.

During their first year, students study and discuss an integrated case that focuses on a single company and is incorporated into several core courses.

* During Apollo 13, Apollo 14, Apollo 15, Apollo 16 and Apollo 17, the S-IVB ( the rocket's third stage ) was crashed into the Moon in order to perform seismic measurement used for characterizing the lunar core.

During the 260s, the breakup of the Roman Empire into three distinct governing entities ( the core Roman Empire, the Gallic Empire and the Palmyrene Empire ) placed the whole Roman imperium into a precarious position.

During the 1570s he had to defend his core territories in Holland several times, but in the 1580s the inland cities in Holland were secure.

During the third and fourth years, cadets have more flexibility to focus in their major areas of study, but the core requirements are still significant.

During the transition to the Neolithic age, agriculture and cattle breeding became the core activities of a growing number of human communities.

During the 1970s and early 1980s, the decaying old downtown core of Hull was transformed by demolition and replacement with a series of large office complexes.

During the 1970s and early 1980s, the decaying old downtown core of Hull was transformed by demolition and replacement with a series of large office complexes.

During the following eight years he restored or rebuilt 32 homes and businesses, which have become the core of a neighborhood revival.

During the 1970s and 1980s, Billings also saw the completion of other important buildings in its downtown core ; the Norwest Building ( now Wells Fargo ), Granite Tower, Sage Tower the MetraPark arena, the TransWestern Center, many new city owned parking garages and the First Interstate Tower, now the tallest building in a five state area.

During collapse, an electron-degenerate gas forms in the core, providing sufficient degeneracy pressure as it is compressed to resist further collapse.

During the first part of his operatic career ( 1733 – 39 ), Rameau wrote his great masterpieces destined for the Académie royale de musique: three tragédies en musique and two opéra-ballets that still form the core of his repertoire.

" During this period the roots of blues, gospel, jazz and country music took shape ; in the 20th century, these became the core of American popular music, which further evolved into the styles like rhythm and blues, rock and roll and hip hop music.

During its ten-year lifespan, Wings underwent numerous personnel changes, including twice being reduced to its core McCartney-McCartney-Laine trio.

During this time, she became close to her piano accompanist, Barry Manilow, who produced her first album in 1972, The Divine Miss M. It was during her time at the Continental Baths that she built up a core following.

During their first year, all students pursue a required core curriculum that covers traditional management disciplines — finance, marketing, statistics, and strategy — as well as the leadership, ethics, and communication skills needed at senior levels of management.

During the late 19th century, the term was gradually adopted by cities across the United States and Canada to refer to the historical core of the city ( which was most often the same as the commercial heart of the city ).

During the Middle Ages, it was the largest village of Uppland, the eastern part of which probably originally formed the core of the complex of properties belonging to the Swedish Crown, the so called Uppsala öd, of which the western part consisted of the royal estate itself, kungsgården.

During this time they organised numerous actions with varying degrees of success until staff turnover and the strain on a small number of core activists took its toll.

During a state visit to India in November 2010, U. S. President Barack Obama announced U. S. support for India's membership in the Nuclear Suppliers Group, the Wassenaar Arrangement, the Australia Group and the Missile Technology Control Regime, " in a phased manner ," and to encourage the evolution of regime membership criteria to that end, " consistent with maintaining the core principles of these regimes.