If you happen to live in the more equatorially adjacent parts of the world, the arrival of March probably means no major change in your life, save for writing a three on your checks instead of a two.
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Like the previously released tune from last week, "Above The Waves," the new beat finds the pair seemingly exploring a nautical theme—the Intertropical Convergence Zone (ITCZ) is the name of the equatorially-proximate area around the world where the northeast and southeast trade winds meet.
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It is thought to be the world's first equatorially-mounted telescope.
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Such an arrangement is called a sidereal or clock drive. The green equatorially mounted telescope rotates at the same rate as the earth but in the opposite direction, while the red telescope is not driven.
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There are two germ pores on each spore, situated equatorially, without bumps (papilla). The telia (fruiting structures that produce teliospores) resemble uredinia. The teliospores are 27–46 by 20–30 µm, and not constricted at the septum.
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A 150 ha plot of woodland near Nançay became available and was purchased in 1953. Initially, various small instruments - single dishes and interferometers - were installed. 6 m wide railway tracks, one running east–west and one north–south were constructed, which would carry the equatorially mounted 40 t Würzburg antennas.
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C/1890 V1 (Zona) is a non-periodic comet discovered on 15 November 1890 by the Italian astronomer Temistocle Zona with an equatorially mounted Merz telescope at the Osservatorio Astronomico di Palermo.Osservazioni della Cometa 1890 IV (Zona Nov. 15) Whilst attempting to observe this comet, Spitaler discovered the eponymous 113P/Spitaler in 1890.
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Looking north along the radio heliograph. Looking east along the radio heliograph. The heliograph is a T-shaped interferometer made up of equatorially mounted antennas of several metres (mostly 5 m) diameter. 19 antennas are located on an east–west baseline 3.2 km long, 25 antennas are on a north–south baseline 2.5 km long.
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From a dorsal view of the cell, the lipped cingulum (located equatorially) can be viewed. The cingulum is narrow and the inside surface has round pores with smooth edges. There are also marginal pores surrounding the lipped cingulum. Coolia also has a narrow sulcus that contains relatively short longitudinal flagellum at the posterior end.
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The Ashburton Astronomy Group Observatory is situated in the grounds of Ashburton College. The building and equipment is owned by the college but administered and maintained by the AAG. The primary instrument in use is a 130-year-old equatorially mounted 230mm With-Browning newtonian reflector telescope. The observatory is of the roll-off-roof variety.
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This rapid rotation is giving the star an oblate shape with an equatorial bulge that is an estimated 16% larger than the polar radius. Observations since 1997 suggest 21 Vul has an orbiting disk of gaseous material that is too equatorially confined to make it a shell star. The line strengths from this disk have been decreasing over time.
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The Ryle Telescope was an eight-element interferometer operating at 15 GHz (2cm wavelength). The elements were equatorially mounted 13-m Cassegrain antennas, on an (almost) east-west baseline. Four aerials were mounted on a 1.2 km rail track, and the others were fixed at 1.2 km intervals. Baselines between 18 m and 4.8 km were therefore available, in a variety of configurations.
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The telescope is mounted equatorially, loosely following the design of the 4m Kitt Peak National Observatory telescope. The mount was manufactured in Muroran, Japan by Mitsubishi Electric. It was shipped to Australia in early 1973 before being assembled at Siding Spring Mountain in April of that year. The telescope drive system was also produced by Mitsubishi Electric and delivered at this time.
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The cirri are organized equatorially around the cells in 7-10 longitudinal rows. Each row is in turn organized into four groups of cirri. When species of Halteria beat these cirri in unison, they generate a characteristic jumping motion sufficiently distinct to Halteria that observation of this movement has been considered sufficient for visual identification of Halteria The cortex of Halteria is composed of four membranes.
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The eggs hatch towards the end of June, and the larval stages closely resemble those described by Verhoeff (1902–25) in MecistocephaZus carniolensis C. L. Koch. Hatching is a very gradual process in Strigamia. the egg shell splits equatorially, and as the embryo, which is bent into a horseshoe shape, gradually elongates and uncurls during development. It pushes the two halves of the shell apart.
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Site 1 is located in the central pore and shares the same plane that is occupied by the key selective residues D541. Site 2 is thought to be present about 6-8 Å below Site 1 followed by Site 3 which is located in the central pore axis about 6.8 Å below Site 2. Site 2 and 3 are thought to interact with partially-hydrated to equatorially-hydrated Ca2+ ions.
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This appears to be conserved across many aldehyde dehydrogenases. The tetramerization domains lie equatorially along the "X" and the nucleotide binding regions appear on the tips of the "X". Nearby the tetramerization domain lies a 12 Å deep tunnel that gives the substrate access to the key catalytic regions. Residues near the C-terminal end of the catalytic domain have been found to impart specificity in other aldehyde dehydrogenases.
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The "Ritchey–Chrétien Telescope" is also an equatorially driven, fork-mounted telescope. The Ritchey is the original Station telescope which was moved from USNO in Washington in 1955. It is also the first R-C telescope ever made from that famous optical prescription, and was coincidentally the last telescope built by George Ritchey himself. The telescope is still in operation after a half century of astronomy at NOFS.
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Journal of Nematology 16(2): 204–206. The vulva is 46-54% of the total body length, and is located equatorially with a transverse slit shape, with the vagina having a diameter of 1/3 of the body diameter. The ovaries normally occur in pairs, and are amphidelphic and relexed. The prerectum of X. americanum measures 120–140 μm long, with a rectum that is roughly the same length as the body diameter at the anus.
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AMI Large Array AMI Large Array in June 2014 The AMI Large Array (AMI LA) is composed of eight 12.8-metre-diameter, equatorially mounted parabolic antennas, which were previously part of the Ryle Telescope. The antennas are separated by distances ranging between 18 and 110 m. The telescope has an angular resolution of approximately 30 arcseconds. The LA is used to image the radio sources (mainly radio galaxies) that contaminate the Small Array observations of the CMB.
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Regalecus russelii lives in deep waters near areas such as Japan, California, and Baja California, in waters such as the Pacific, Atlantic, and Indian oceans. Since 1901, there have been 19 verified sightings and strandings along the coast of California waters. The R. russelii is found around the world equatorially, while the Regalecus glesne is found with antitropical distribution. The lack of live sightings of oarfish has made it difficult to determine the precise distribution of the Regalecus, and further research is needed.
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Note that the twist-boat (D2) conformer and the half-chair (C2) transition state are in chiral point groups and are therefore chiral molecules. In the figure, the two depictions of B and two depictions of D are pairs of enantiomers. As a consequence of the chair flip, the axially- substituted and equatorially-substituted conformers of a molecule like chlorocyclohexane cannot be isolated at room temperature. However, in some cases, the isolation of individual conformers of substituted cyclohexane derivatives has been achieved at low temperatures (–150 °C).
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A study using (benzyloxy)acetaldehyde as the electrophile showed that the stereochemical outcome is consistent with the carbonyl oxygen binding equatorially and the ether oxygen binding axially. PyBox Stereochemical model Metal complexes incorporating bis(oxazoline) ligands are effective for a wide range of asymmetric catalytic transformations and have been the subject of numerous literature reviews. The neutral character of bis(oxazoline)s makes them well suited to use with noble metals, with copper complexes being particularly common. Their most important and commonly used applications are in carbon–carbon bond forming reactions.
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For component Ab, the corresponding polar values are and 10,120 K, and the equatorial values are and 9,560 K. This results in the star being brighter when seen along their axes of rotation and less bright when observed at their equators. From Earth, the pair is observed nearly equatorially and the absolute visual magnitude is +0.02; from a different direction the absolute magnitude would be −0.138 or less. Delta Velorum B is a smaller main sequence star, with a mass of about , a temperature of 6,600 K, a radius of , and a bolometric luminosity of .
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He won the Copley Medal in 1826 and the Gold Medal of the Royal Astronomical Society in that same year. He was knighted by King William IV in 1831. Starting around 1826, James South made plans for a new, larger telescope, an equatorially mounted achromatic refractor (a telescope with a lens) in a new observatory. He bought a 12-inch (actually about 11.8) aperture lens from Robert-Aglaé Cauchoix in Paris for about 1000 pounds, large enough to be the biggest achromatic object lens in the world at the time.
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Equatorially, five nearly planar oxygen atoms representing vertices of distinct silicate tetrahedra coordinate each thorium. The lengths of the axial Th-O bonds are 2.43 Å, 2.51 Å, 2.52 Å, 2.81 Å, and of the equatorial bonds, 2.40 Å, 2.41 Å, 2.41 Å, 2.50 Å, and 2.58 Å. The Si-O bonds are nearly equal, with lengths 1.58 Å, 1.62 Å, 1.63 Å, and 1.64 Å. Huttonite is isostructural with monazite. Substitution of the rare-earth elements and phosphorus of monazite with thorium and silicon of huttonite can occur to generates a solid solution.
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104, In the postnatal eye, Cloquet's canal marks the former location of the hyaloid artery. After regression of the hyaloid artery, the lens receives all its nourishment from the aqueous humor. Nutrients diffuse in and waste diffuses out through a constant flow of fluid from the anterior/posterior poles of the lens and out of the equatorial regions, a dynamic that is maintained by the Na+/K+-ATPase pumps located in the equatorially positioned cells of the lens epithelium. Glucose is the primary energy source for the lens.
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Guinevere Planitia is an expansive lowland region of Venus that lies east of Beta Regio and west of Eistla Regio (quadrangle V-30). These low-lying plains, particularly in the western portion, are characterized by apparent volcanic source vents and broad regions of bright, dark, and mottled deposits. They are the only break in an equatorially connected zone of highlands and tectonic zones. The types, numbers, and patterns of mapped tectonic features and small volcanic landforms in the region provide important detail in the interpretation and evolution of venusian landscape.
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The tetradentate, monobasic corrin ligand is equatorially coordinated with a trivalent cobalt ion which bears two additional axial ligands. Figure 1 Several natural variants of the B12 structure exist that differ in these axial ligands. In the vitamin itself, the cobalt bears a cyano group on the top side of the corrin plane (cyanocobalamin), and a nucleotide loop on the other. This loop is connected on its other end to the peripheral propionic amide group at ring D and consists of structural elements derived from aminopropanol, phosphate, ribose, and 5,6-dimethylbenzimidazole.
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Rossby-gravity waves are equatorially trapped waves (much like Kelvin waves), meaning that they rapidly decay as their distance increases away from the equator (so long as the Brunt–Vaisala frequency does not remain constant). These waves have the same trapping scale as Kelvin waves, more commonly known as the equatorial Rossby deformation radius.Gill, Adrian E., 1982: Atmosphere- Ocean Dynamics, International Geophysics Series, Volume 30, Academic Press, 662 pp. They always carry energy eastward, but their 'crests' and 'troughs' may propagate westward if their periods are long enough.
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The Anglo-Australian Telescope (AAT) is a 3.9-metre equatorially mounted telescope operated by the Australian Astronomical Observatory and situated at the Siding Spring Observatory, Australia at an altitude of a little over 1,100 m. In 2009, the telescope was ranked as the fifth highest-impact of the world's optical telescopes. In 2001–2003, it was considered the most scientifically productive 4-metre-class optical telescope in the world based on scientific publications using data from the telescope. The telescope was commissioned in 1974 with a view to allowing high quality observations of the sky from the southern hemisphere.
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Chromosomes are normally visible under a light microscope only during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, each chromosome is duplicated (S phase), and both copies are joined by a centromere, resulting either in an X-shaped structure (pictured here), if the centromere is located equatorially, or a two-arm structure, if the centromere is located distally. The joined copies are now called sister chromatids. During metaphase the X-shaped structure is called a metaphase chromosome, which is highly condensed and thus easiest to distinguish and study.
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The four vegetal blastomeres divide equatorially but unequally and they give rise to four big macromeres and four smaller micromeres. Once this fourth division has occurred, the embryo has reached a 16 cell stage. P. flava has a 16 cell embryo with four vegetal micromeres, eight animal mesomeres and 4 larger macromeres. Further divisions occur until P. flava finishes the blastula stage and goes on to gastrulation. The animal mesomeres of P. flava go on to give rise to the larva’s ectoderm, animal blastomeres also appear to give rise to these structures though the exact contribution varies from embryo to embryo.
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Pedinella is a genus of small, unicellular planktonic or attached, flagellated heterokonts first described in 1888 by A. V. Vysotskij. The genus is monospecific, and the single species is Pedinella hexacostata Vysotskij. Pedinella has an inverted bell or apple shape with a stalk arising from the posterior end, and has a single, long, ribbon-like, apical flagellum and, a second apical flagellum that is reduced to its basal body. The cells are radially symmetrical, with a large central nucleus, surrounded equatorially by a number of chloroplasts that cause the body to bulge out where the plastids are pushed up against the plasma membrane.
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Figure 2. The active site of 1,2-CTD. This non-heme Fe3+ complex is axially ligated by Tyr200 and His226 and equatorially ligated by Tyr164, His224, and a solvent water molecule, giving the active site an overall trigonal bipyramidal geometry Almost all members of the 1,2-CTD family are homodimers; the 1,2-CTD enzyme produced by Pseudomonas arvilla is the exception to this rule, containing two highly homologous subunits that can form either a homo- or hetero- dimer. The enzyme resembles a boomerang in shape, and can therefore be clearly divided into three domains: two catalytic domains residing at each end of the “boomerang” and a linker domain at the center.
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In April 1901, a brilliant comet appeared in the New Zealand evening skies.The Great Comet of 1901 was observed by Ward with a telescope he'd installed in his own business premises. Ward had installed a 4½ inch equatorially mounted refractor in a small observatory at the back of his business premises, and from the report in the Wanganui Herald of 3 May, it would appear that this was the first view Wanganui residents had of the Great Comet of 1901. The number of people who came to view the comet through this telescope, gave Ward the idea of forming a small society of interested persons.
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The building incorporated a polar Cassegrain telescope, a transit telescope (no longer functional), a solar telescope, and a sundial, on the south wall. The name Stellafane (originally suggested by Porter at the club's January 1924 meeting) comes from the Latin words stella meaning star, and fane meaning shrine which together means "Shrine to the Stars". Besides the historic Stellafane "pink clubhouse," the site includes Porter's uniquely designed Turret Telescope, a f/17 Newtonian reflector that was completed in 1931. This telescope consists of an equatorially rotated concrete dome with the telescope mounted on the outside, with the observer on the inside working in heated comfort.
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The lens epithelium, located in the anterior portion of the lens between the lens capsule and the lens fibers, is a simple cuboidal epithelium. The cells of the lens epithelium regulate most of the homeostatic functions of the lens. As ions, nutrients, and liquid enter the lens from the aqueous humor, Na+/K+-ATPase pumps in the lens epithelial cells pump ions out of the lens to maintain appropriate lens osmotic concentration and volume, with equatorially positioned lens epithelium cells contributing most to this current. The activity of the Na+/K+-ATPases keeps water and current flowing through the lens from the poles and exiting through the equatorial regions.
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At the cytokinesis furrow, it is the actin-myosin contractile ring that drives the cleavage process, during which cell membrane and wall grow inward, which eventually pinches the mother cell in two. The key components of this ring are the filamentous protein actin and the motor protein myosin II. The contractile ring assembles equatorially (in the middle of the cell) at the cell cortex (adjacent to the cell membrane). Rho protein family (RhoA protein in mammalian cells) is a key regulator of contractile ring formation and contraction in animal cells. The RhoA pathway promotes assembly of the actin-myosin ring by two main effectors.
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The aza-Cope/Mannich reaction, when participating in ring-expanding annulations, follows the stereochemistry dictated by the most favorable chair conformation, which generally places bulky substituents quasi-equatorially. The vinyl and amine components can have either syn or anti relationships when installed on a ring. This relationship is typically dictated by the amine substituent: bulky substituents lead to syn aza-Cope precursors. While anti vinyl and amine substituents generally only have one favored transition state, leading to a cis fused ring system, the favored product of syn substituents can change, dictated by steric interactions with solvents or large N-substituents, which may take preference over bulky substituents and change the transition state.
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As previously stated, the mixed Rossby-gravity waves are equatorially trapped waves unless the buoyancy frequency remains constant, introducing an additional vertical wave number to complement the zonal wave number and angular frequency. If this Brunt–Vaisala frequency does not change, then these waves become vertically propagating solutions. On a typical "m,k" dispersion diagram, the group velocity (energy) would be directed at right angles to the n = 0 (mixed Rossby-gravity waves) and n = 1 (gravity or Rossby waves) curves and would increase in the direction of increasing angular frequency. Typical group velocities for each component are the following: 1 cm/s for gravity waves and 2 mm/s for planetary (Rossby) waves.
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Front row: Arville Walker, unknown (possibly Johanna Mackie), Alta Carpenter, Mabel Gill, Ida Woods. Partly in response to renewed public interest in astronomy following the 1835 return of Halley's Comet, the Harvard College Observatory was founded in 1839, when the Harvard Corporation appointed William Cranch Bond as an "Astronomical Observer to the University". For its first four years of operation, the observatory was situated at the Dana-Palmer House (where Bond also resided) near Harvard Yard, and consisted of little more than three small telescopes and an astronomical clock. In his 1840 book recounting the history of the college, then Harvard President Josiah Quincy III noted that "...there is wanted a reflecting telescope equatorially mounted...".
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In the Northern hemisphere, rough alignment can be done by visually aligning the axis of the telescope mount with Polaris. In the Southern hemisphere or places where Polaris is not visible, a rough alignment can be performed by ensuring the mount is level, adjusting the latitude adjustment pointer to match the observer's latitude, and aligning the axis of the mount with true south or north by means of a magnetic compass. (This requires taking the local magnetic declination into account). This method can sometimes be adequate for general observing through the eyepiece or for very wide angle astro-imaging with a tripod-mounted camera; it is often used, with an equatorially-mounted telescope, as a starting point in amateur astronomy.
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Henry Hindley (1701–1771) was an 18th-century clockmaker, watchmaker and maker of scientific instruments. He invented a screw-cutting lathe, a fusee-cutting engine and an improved wheel-cutting engine and made one of the first dividing engines,Scientific Instruments of the Seventeenth and Eighteenth centuries and their Makers, Portman Books, London 1989 for the construction of accurately- graduated arcs on scientific instruments. He is thought to have made the world's first equatorially-mounted telescope, which can now be seen in Burton Constable Hall. Hindley was a Roman Catholic, born in Wigan (Lancs) in 1701. He was apprenticed and made clocks in Wigan from 1726 to 1730 and moved to York in 1731, where he was established first in Petergate and then Stonegate from 1741 until his death in 1771.
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The telescope initially mounted on a wooden stand, but the arrival of the great lens had caught the attention of Dr Thomas Romney Robinson, who had become director of the Armagh Observatory in 1823, and become a friend of Cooper's At Robinson's suggestion, the telescope was removed its temporary alt-azimuth stand, and mounted equatorially by Thomas Grubb of Dublin, with the innovation of a cast iron tube and stand, instead of the wooden mountings previously used. (This was the first major commission for Grubb, who was assiduously promoted by Robinson, and went on to become a noted producer of telescopes for observatories all around the world). However, it was thought impractical to build a dome of the required size, so the instrument was set up outdoors, and remained uncovered. Cooper used the telescope to sketch Halley's Comet in 1835 and to view the solar eclipse of 15 May 1836.
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Sverdrup introduced a potential vorticity argument to connect the net, interior flow of the oceans to the surface wind stress and the incited planetary vorticity perturbations. For instance, Ekman convergence in the sub- tropics (related to the existence of the trade winds in the tropics and the westerlies in the mid-latitudes) was suggested to lead to a downward vertical velocity and therefore, a squashing of the water columns, which subsequently forces the ocean gyre to spin more slowly (via angular momentum conservation). This is accomplished via a decrease in planetary vorticity (since relative vorticity variations are not significant in large ocean circulations), a phenomenon attainable through an equatorially directed, interior flow that characterizes the subtropical gyre. The opposite is applicable when Ekman divergence is induced, leading to Ekman absorption (suction) and a subsequent, water column stretching and poleward return flow, a characteristic of sub- polar gyres.
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As the minimum approached, the belts of disturbance gradually contracted towards and died out near the equator; shortly after which two fresh series broke out, as if by a completely new impulse, in comparatively high latitudes, and spread equatorially. No satisfactory rationale of this curious procedure has yet been arrived at. It is, nevertheless, intimately related to the course of sun-spot development, since Wolf found evidence of a similar behaviour in Böhm's observations of 1833–6, and it was perceived by Spörer and Secchi to recur in 1867. While still in his apprenticeship at Durham, Carrington repaired to Sweden on the occasion of the total solar eclipse of 28 July 1851, and made at Lilla Edet, on the Göta river, observations printed in the Memoirs of the Royal Astronomical Society (xxi. 58). The experience thus gained was turned to public account in the compilation of Information and Suggestions addressed to Persons who may be able to place themselves within the Shadow of the Total Eclipse of the Sun on September 7, 1858, a brochure printed and circulated by the lords of the admiralty in May 1858.
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