Initialization synchronous

How many divisions In the development pathway of C. elegans, cell division is initially synchronous—that is, all cells divide at the same rate. Later in development, some cells divide more frequently than do others. How many times does each cell divide in the synchronous period Refer to Figure 2.26. 

Fig. 25. Time course of population increase in an initially synchronous culture as calculated from Eq. (154).

Miles, R, Wong, RK (1983) Single neurones can initiate synchronized population discharge in the hippocampus. Nature, 306 371-373. 

The turbogenerator was initially synchronized to the grid on November 8, 1975. Up to the end of 1988 (final shut-down) the helium-turbine plant had achieved approximately 24,000 hours of operation, not including periods when it was used for test puiposes in isolated operation. A total of 11,500 hours of operation had been at the design temperature of 750 C. 

Calling the initial synchronous oscillation the k=0 wave, we have... 

There is evidence that the signalling factor Wnt 8 acts as a signal to initiate synchronous expression of the different Hox complexes. (In der Rieden et al., 2010)... 

In the ease of the brain, the initial synchronization at a particular frequency band corresponds to a particular functional state of the body. In the particular case of the experiment on anaesthetized rats [20], this state corresponds to the state of deep anesthesia (aeeompanied by synchronization in the delta frequency band). In this... 

Before this statement is further elaborated, we should like to reemphasize the distinction we make between the (positive) signal which initiates (synchronous) DNA synthesis, and the factors which define the duration of the new hybrid cell cycle to be eflEective, the former requires only that the nuclei (or karyomeres) reside in the same cytoplasm, while the latter requires the enclosure of the chromosomes within a single nucleus. 

The laminography method was developed initially for medical applications as a non-computer layer-by-layer visualization of the human body [1,2]. In this case an inclined initial X-ray beam projects an image of a specific layer of the object to the detector surface with defocusing of the other layers during a synchronous rotation of the object and the detector (Fig. 1). 

If the masses are displaced in an arbiPary way or arbiPary initial velocities are given to them, the motion is asynchronous, a complex mixture of synchronous and antisynchronous motion. But the point here is that even this complex motion can be broken down into two normal modes. In this example, the synchronous mode of motion has a lower frequency than the antisynchronous mode. This is generally Pue in systems with many modes of motion, the mode of motion with the highest symmePy has the lowest frequency. 

The notion of an atomic operation is important for synchronization. An atomic operation is one that is indivisible. Once initiated, it will continue to completion. There are usually a large number of synchronization primitives in a parallel computer, most commonly test and set primitives, or semaphores implemented in hardware (10). A test and set operation tests the current value of a variable and optionally sets a new value, all in one indivisible operation. 

The sequence of clutch-engaging action is depicted in Fig, 29-77, Primary or secondaiw pawls (A) initiate engagement at clutch synchronism by aligning and engaging the relay clutch teeth (B), As the lightweight relay clutch (C) slides along its helical splines (D), the pawls are unloaded. 

B synchronously moving away from and toward H the H atom does not move (if A and B are of equal mass). If H does not move in a vibration, its replacement with D will not alter (he vibrational frequency. Therefore, there will be no zero-point energy difference between the H and D transition states, so the difference in activation energies is equal to the difference in initial state zero-point energies, just as calculated with Eq. (6-88). The kinetic isotope effect will therefore have its maximal value for this location of the proton in the transition state. 

Figure 1, Forcing functions for monomer (fu) and initiator (fi) feeds (a) sinusoidal (b) square-wave (c) reception vessel valve operating sequences which are synchronized with the feed policies (see Figure 2 for the location of the valves...

Since the quantum chemical calculations used to parameterize equations 6 and 7 are relatively crude semiempirical methods, these equations should not be used to prove or disprove differences in mechanisms of decomposition within a family of initiators. The assumption made in the present study has been that the mechanism of decomposition of initiators does not change within a particular family of initiators (reactions 1-4). It is generally accepted that trow5-symmetric bisalkyl diazenes (1) decompose entirely by a concerted, synchronous mechanism and that trans-phenyl, alkyl diazenes (2) decompose by a stepwise mechanism, with an intermediate phenyldiazenyl radical (37). For R groups with equal or larger pi-... 

The multiple sites that serve as origins for DNA replication in eukaryotes are poorly defined except in a few animal viruses and in yeast. However, it is clear that initiation is regulated both spatially and temporaUy, since clusters of adjacent sites initiate rephcation synchronously. There are suggestions that functional domains of chromatin replicate as intact units, implying that the origins of rephcation are specificaUy located with respect to transcription units. 

That an episode arises and spreads from the synchronous as well as excessive discharge of a group of neurons (focus) means that not only must those neurons be in some way predisposed to so discharging but they can also recruit neurons that are otherwise normal. How that discharge manifests itself, i.e. which type of epilepsy occurs, will depend not only on where the abnormal focal neurons are located but also to what extent the activity they initiate can and does spread through the brain. There are consequently a number of different forms of epilepsy, i.e. the epilepsies. 

In oriented, partially dehydrated multilayers, under conditions suitable for X-ray diffraction studies, the sarcoplasmic reticulum vesicles retain much of their ATP energized Ca transport activity [200-202], The Ca transport can be initiated by flash-photolysis of P -l(2-nitro)phenyl-ethyladenosine-5 -triphosphate, caged ATP [203-208], The flash-photolysis of caged ATP rapidly releases ATP and effectively synchronizes the Ca transport cycle of the ensemble of Ca -ATPase molecules [190-192,201,209],... 

A memory sweep is initialized when the MCA receives a start pulse from the function generator at the trigger input (7). The start pulse is synchronized with the sweep of the reference voltage (Vr) for the Mossbauer drive. It opens the first MCA channel when the source velocity passes through the minimum (cf. Fig. 3.3). After this start trigger, a train of 512 channel advance pulses follows with exact delay times of about 100 ps each. On receiving such a channel advance pulse, the... 

Direct current cardioversion is the process of administering a synchronized electrical shock to the chest. The purpose of DCC is to simultaneously depolarize all of the myocardial cells, resulting in interruption and termination of the multiple reentrant circuits and restoration of normal sinus rhythm. The initial energy level of the shock is 100 joules (J) if the DCC attempt is unsuccessful, successive cardioversion attempts maybe made at 200,300, and 360 J.14 Delivery of the shock is synchronized to the ECG by the cardioverter machine, such that the electrical charge is not delivered during... 

Hemodynamically unstable PSVT should be treated with immediate synchronized DCC, using an initial energy level of 50 J if the DCC attempt is unsuccessful, successive cardioversion attempts may be made at 100, 200,300, and 360 J.14... 

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