As they nonetheless consititute a discrete subpopulation evolving towards subspecies status, their population numbers could arguably deserve monitoring.

In these cells, microtubules are nucleated from discrete sites in the cytoplasm.

Ramón y Cajal proposed that neurons were discrete cells that communicated with each other via specialized junctions, or spaces, between cells.

It held that neurons are discrete cells ( not connected in a meshwork ), acting as metabolically distinct units.

* the ethmoid sinuses, which are formed from several discrete air cells within the ethmoid bone between the nose and the eyes.

Cajal challenged this view after staining areas of the brain that had less myelin and discovering that neurons were discrete cells.

** the ethmoid sinuses, which are formed from several discrete air cells within the ethmoid bone between the nose and the eyes.

BPH involves hyperplasia of prostatic stromal and epithelial cells, resulting in the formation of large, fairly discrete nodules in the periurethral region of the prostate.

* A partition dividing filamentous hyphae into discrete cells in fungi

** The volume occupied by the fluid is divided into discrete cells ( the mesh ).

These walls resemble the walls of a closed-cell foam, dividing the universe into discrete cells.

Continuous spatial automata resemble continuous automata in having continuous values, but they also have a continuous set of locations rather than restricting the values to a discrete grid of cells.

Others, known as discrete methods, divide the space in cells and focus on determining the value of the in each cell.

It is proposed that core relay cells and matrix cells projecting from the dorsal thalamus allow for synchronization of cortical and thalamic cells during " high-frequency oscillations that underlie discrete conscious events ", though this is a heavily debated area of research.

The electrical activity of ventricular systole is coordinated by the atrioventricular node, this discrete collection of cells receives electrical stimulation from the atrium, but also has a slower intrinsic pacemaker activity.

The DCT that is widely used in this regard was introduced by N. Ahmed, T. Natarajan and K. R. Rao in 1974 ; see Reference 1 in discrete cosine transform.

The convolution integral ( or summation ) above need only extend to the full duration of the impulse response T, or the order N in a discrete time filter.

However the duration of the filter's impulse response, and the number of terms which must be summed for each output value ( according to the above discrete time convolution ) is given by where T is the sampling period of the discrete time system ( N-1 is also termed the order of an FIR filter ).

the coefficients are equivalent to samples of S < sub > 1 / T </ sub >( ƒ ) at discrete intervals of 1 / P = 1 / NT: ( see DTFT / Sampling the DTFT )

A widely used transform in this regard is the Discrete Cosine Transform ( DCT ), developed by in 1974 by N. Ahmed, T. Natarajan and K. R. Rao ; see Reference 1 in discrete cosine transform.

The most common variant of discrete cosine transform is the type-II DCT, which is often called simply " the DCT ", ( N. Ahmed, T. Natarajan and K. R. Rao, 1974 ; K. R. Rao and P. Yip, 1990 ); its inverse, the type-III DCT, is correspondingly often called simply " the inverse DCT " or " the IDCT ".

* Kawaguchi, T., Tanaka, T. and Tsuji, Y., Numerical simulation of two-dimensional fluidized beds using the discrete element method ( comparison between the two-and three-dimensional models ) Powder Technology, 96 ( 2 ): 129 – 138, 1998.

This advantage, however, comes at the price of greater computational requirements if compared, for example and when applicable, to the discrete cosine transform, and in particular to the DCT-II which is simply known as the " DCT "; introduced by N. Ahmed, T. Natarajan and K. R. Rao in 1974 ; see Reference 1 of discrete cosine transform.

( In addition, its variance over time T is equal to T ; see Wiener process: Basic properties ); a good discrete analogue for W is a simple random walk.

* H. V. Sorensen, D. L. Jones, C. S. Burrus, and M. T. Heideman, " On computing the discrete Hartley transform ," IEEE Trans.

where the present value of the discrete income at time < math > t_0 < T </ math >, and is the continuously compounded dividend yield over the life of the contract.

where the present value of the discrete storage cost at time < math > t_0 < T </ math >, and is the continuously compounded storage cost where it is proportional to the price of the commodity, and is hence a ' negative yield '.

The specification uses the following existing file formats with the addition of specific metadata tags: JPEG DCT ( where DCT refers to the 1974 publication by N. Ahmed, T. Natarajan and K. R. Rao, Reference 1 in discrete cosine transform ) for compressed image files, TIFF Rev.

The DCT that is widely used in this regard was introduced by N. Ahmed, T. Natarajan and K. R. Rao in 1974 ; see Reference 1 in discrete cosine transform.

Since T is compact, the topology on the dual group is that of uniform convergence, which turns out to be the discrete topology.

* Every triangle group T is a discrete subgroup of the isometry group of the sphere ( when T is finite ), the Euclidean plane ( when T has a Z + Z subgroup of finite index ), or the hyperbolic plane.

Their immunology centres around the interaction of immunoregulatory cytokines and discrete subpopulations of T lymphocytes.

* The study of unitary representations of discrete groups and Kazhdan's property ( T )

Often the x sequence represents the values ( aka samples ) of a continuous-time function, x ( t ), at discrete moments in time: t = nT, where T is the sampling interval ( in seconds ), and is the sampling rate ( samples per second ).

The early committed progenitors express low levels of transcription factors that may commit them to discrete cell lineages.

Importantly, as interactions between proteins are reversible, and depend heavily on the availability of different groups of partner proteins to form aggregates that are capable to carry out discrete sets of function, study of the interactions between specific proteins is a key to understand important aspects of cellular function, and ultimately the properties that distinguish particular cell types.

The first generation is created by applying the above rules simultaneously to every cell in the seed — births and deaths occur simultaneously, and the discrete moment at which this happens is sometimes called a tick ( in other words, each generation is a pure function of the preceding one ).

The " theoretical frequency " for any cell ( under the null hypothesis of a discrete uniform distribution ) is thus calculated as

Additional values recorded for each cell may be a discrete value, such as land use, a continuous value, such as temperature, or a null value if no data is available.

Note that there is one discrete Hadley cell that may split, shift and merge in a complicated process over time.

In computing, an address space defines a range of discrete addresses, each of which may correspond to a network host, peripheral device, disk sector, a memory cell or other logical or physical entity.

Increasingly, scientists view the cell as composed of modular supramolecular complexes, each of which performs an independent, discrete biological function.

The inner plate appears like a discrete heterochromatin domain throughout the cell cycle.

Many of these stains show specificity for discrete cellular compartments or antigens, while others will stain the whole cell.

A continuous automaton can be described as a cellular automaton extended so the valid states a cell can take are not just discrete ( for example, the states consist of integers between 0 and 3 ), but continuous, for example, the real number range.

Signals pass across the synapses from one nerve cell to the next as discrete ( digital ) packets of chemicals, which are then summed within the nerve cell in an analog fashion by building an electro-chemical potential until its threshold is reached, whereupon it discharges and sends out a series of digital packets to the next nerve cell.

Note that this is not the same as 1T DRAM, which is a " capacitorless " DRAM cell built using the parasitic channel capacitor of SOI transistors rather than a discrete capacitor.

It is advantageous in that it performs well with minimal discrete components, and can run from a single 1. 5-volt cell.