Introduction to n scale model railroading,what are the different scale train sets,new york public transportation closed,n scale propane tank car jobs - Easy Way

11.01.2016
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No one at that time had any knowledge of the true position and outlines of East Asia, yet the representation of East Asia is identical on both the Martellus maps and the Behaim globe. Who had most to gain from such a reckless exaggeration of the extent of Eurasia and who was the first to do so?
The Arctic coasts on the Martellus map and those of north and northwest Europe resemble those of the Fra Mauro planisphere of 1459 (#249) rather than those of the Ulm Ptolemy of 1482. In the volume of Imago Mundi, found amongst the possessions of Christopher Columbus after his death, there are numerous notes or postils written in the margins or below the printed matter. Note that in the year a€?88 in the month of December arrived in Lisbon Bartholomew Diaz, Captain of three caravels which the Most Serene King of Portugal had sent to try out the land in Guinea. Another peculiar feature of the Martellus map is the enormous peninsula commencing due south of Aureus Chersonesus [the Malay peninsula] at 28A° south, thereafter widening to reach China. It has become clear to some cartographic scholars that South America was represented as a huge peninsula of southeastern Asia on many world maps of the 16th century, from the Zorzi sketches of 1506 to the Livio Sanuto map of 1574. It is not so well known that this very same peninsula existed already under the name of India Meridionalis on earlier maps, drawn before the arrival in the western hemisphere of Christopher Columbus. However, the Martellus maps show a very good representation of the South American hydrographic system, including all the great rivers in the sub-continent. A deeper study of the same maps has made possible the identification of several capes on the Atlantic coast, the swamps of the Rio Negro in Brazil, and Lake Titicaca.
There was thus no known pre-Columbian historical exploration of South America by the European nations.
The earlier maps extant include the so-called mappaemundi drawn by medieval churchmen in Western Christendom. In order to detect this peninsula on pre-Martellus maps, we needed an identifying criterion. The following is a theory expressed by Paul Gallez regarding the depiction of South America prior to Columbusa€™ voyages.
In the southernmost part of South America (?), there are the words, next to a strait: Hic sunt gigantes pugnantes cum draconious [Here live some giants who fight against the dragons]. Traditionally, the so-called Legend of the Patagonian Giants is attributed to Antonio Pigafetta, the chronicler of Magellana€™s voyage.
The east-west extent from the Canaries to the coast of China is about 235A°, which agrees with the Toscanelli-Columbus concept and with the 1489 Martellus map now in the British Library. The sheets of paper on which the Yale map is drawn are of different sizes, which excluded the possibility that they were printed map sheets, for they would then have had to be the same size to fit within the map portfolio. Roberto Almagia (1940) stated that he had identified no less than three manuscript maps of the world signed by Martellus, all virtually identical with that in the codex in the British Library. When Columbus left Lisbon in 1485 for Spain, Bartholomew, with his highly trained skills as a cartographer in the Genoese style, stayed on in the map workshop of King John II. These two world maps by Martellus represent, along with Martin Behaima€™s famous globe of 1492, the last view of the old pre-Columbian world as perceived by Western Europe before the great expansion of the world picture during the subsequent twenty years. The Yale example shows more of the Ocean Sea in the Far East than does the British Library manuscript. Very little is known about Henricus Martellus Germanus, a mapmaker working in Florence from 1480 to 1496. The Indian Ocean is open to the south, but Martellus retains its eastern coast, which Ptolemy had called Sinae, home of the fish-eating Ethiopians. Martellus retains other Ptolemaic features, such as the appearance of the northern coast of the Indian Ocean with a flattened India and a huge Taprobana. Although Martellusa€™s world maps in the Ptolemy manuscripts show an extension of the inhabited world as 180A°, those in the Insularium make it 220A° or more, an attractive feature to those who dreamed of reaching Asia by sailing west. Most of the text still isna€™t legible, but some of the parts that are appear to be drawn from the travels of Marco Polo through east Asia.
The work of Henricus Martellus Germanus epitomizes the best of European cartography at the end of the 15th century. Wolff, Hans, a€?The Conception of the World on the Eve of the Discovery of America - Introduction,a€? in Wolff, Hans (ed.), America. AlmagiA , Roberto, a€?I mappamondi di Enrico Martello e alcuni concetti geografici di Cristoforo Colombo,a€? La Bibliofolia, Firenze, XLII (1940), pp. AlmagiA , Roberto, a€?On the cartographic work of Francesco Roselli,a€? Imago Mundi, VIII (1951), pp.
Caraci, Ilaria L., a€?La€™opera cartografica di Enrico Martello e la a€?prescopertoa€™ della€™America,a€? Rivista Geografica Italiana 83 (1976), Florence, pp.
Caraci, Ilaria L., a€?Il planisfero di Enrico Martello della Yale University Library e i fratelli Colombo,a€? Rivista Geografica Italiana 85 (1978), Florence, pp. Crino, Sebastiano, a€?I Planisferi di Francesco Roselli,a€? LaBibliofilia, Firenze, XLI (1939), pp. Francesco Rosselli was one of the earliest known map stockists and map sellers; in addition he was an important map-maker whose cartographic output spans the decades of the great discoveries. The mapa€™s most prominent feature is, like the Martellus model, the new outline of Africa, now quite separate from Asia, and reflecting the rounding of the Cape by Bartolomeu Diaz in 1487. First, by 1486 the mathe-matical junta had solved the problem of establishing latitude by measuring the height of the mid-day sun. Experimental results are shown for three energies in a coplanar symmetric geometry, and for three energies in an asymmetric geometry.
Ionization of atomic and molecular targets is one of the most complex and fundamental collision processes that can be studied in detail.
To fully characterize these interactions, it is necessary to perform sophisticated measurements where an incident electron of well controlled momentum scatters and ionizes the target. In these (e,2e) experiments, information about the collision is obtained by measuring the outgoing momenta of the collision products.
For molecular targets, it is difficult to know the orientation and alignment of the molecule prior to the interaction occurring, unless this can be defined prior to the collision or can be measured following the collision. The interaction of low to intermediate energy electrons with molecular targets has been much less studied compared with high energy electron collisions.
Experiments on molecular targets often employ effusive beams produced at room temperature, and so the targets may have internal rotational and vibrational energy. Results are presented here for an H2O target at significantly lower energies than has been studied before. Figure 1.1 Representation of the 1b1 state of H2O, showing an incident electron ionizing the molecule. The experiments described here were carried out in the fully computer controlled and computer optimized (e,2e) spectrometer that operates in Manchester. For the coplanar symmetric experiments described here, the electron detectors were moved so that their angles with respect to the incident beam direction were equal to each other throughout measurement (see figure 1.2).
For coplanar asymmetric experiments, analyzer 1 was fixed at a scattering angle thetaa = 22A°, while analyzer 2 was swept around the scattering plane. The fixed scattering angle thetaa = 22A° was chosen as this was the smallest angle that could be used without the incident electron beam from the gun striking the side of the analyzer (and so producing unacceptable levels of noise on the coincidence signal).
The energy resolution of the spectrometer is set by the resolution of the electron gun and the pass energy of the analyzers. Production of a high quality molecular beam of H2O required careful monitoring of the experiment as it progressed.
The de-gassed water was then transferred to a 150mm long tubular stainless steel flask which was connected to the main vacuum system using a swagelok fitting. An AD590 sensor was secured to the aluminium block surrounding the flask, so that the temperature of the insulated assembly could be monitored and controlled. To monitor the molecular beam inside the vacuum chamber produced from the water, a quadrupole mass spectrometer was installed onto the spectrometer. Figure 1.3 shows a typical coincidence energy spectrum obtained from the experiment during operation.
The experiments were carried out over a period of several months, using electron beam currents ~200nA for all data runs.
As the incident energy increases, the ratio of forward to backward scattering cross section increases, as has been seen for most atomic targets in this geometry. The measured coplanar asymmetric data is shown in figure 4, again normalized to unity at thetab = 45A°. As the incident energy is increased to 55eV above threshold, the forward lobe splits into two clear peaks of approximately equal magnitude, as seen in figure 1.5(b). Results from the 1b1 state of water have been presented for coplanar symmetric and asymmetric energies. These results have been compared to a DWBA theory in the paper J Phys B, however the averaging used in this theory was not a good approximation, and so is not expected to yield accurate results for this state. Experimental results are presented for electron impact ionization of water in the energy regime from near threshold to intermediate energies.
Results of a sophisticated model which approximates the random orientation of the target using a spherical averaging of the wave-function prior to the collision, using sophisticated distorted wave Born calculations that include post-collisional interactions in first order and to all orders of perturbation theory are also shown for comparison (see J. The calculations predict the data most accurately at the lowest energy studied (4eV above threshold) in a coplanar symmetric geometry, whereas the comparison between theory and experiment is generally poor for higher energies and for non-coplanar geometries. Energy deposition and angular distributions resulting from electron collisions with water are used in charged particle track structure analyses to model radiation damage in biological samples. These low energy electrons have an effect over a much wider volume than the targeted cancer site. At incident energies less than ~200eV, the collision dynamics are strongly influenced by effects including post-collision interactions, target polarization, distortions in the wave-functions for the participating electrons and multiple collisions. Current models now yield reasonable agreement with experimental data for a range of atoms, implying a good understanding of the collision dynamics under the conditions used in the experiments, and these models are now being extended to low energy (e,2e) collisions from molecules.
Recent experiments studying simple diatomic targets including H2 and N2 have provided benchmark data. The apparatus at Manchester can also access non-coplanar geometries, and so has provided additional data to further test these models. In a previous study the groups at Manchester and Missouri investigated the 1b1 (HOMO) state of H2O in coplanar kinematics. By contrast, the 3a1 orbital of interest here is involved in the O-H bonding and has a charge density distribution distorted from that of a symmetric atomic like orbital. The experimental triple differential cross sections (TDCS) presented here were measured in the (e,2e) apparatus at the University of Manchester. The spectrometer can be operated in a standard coplanar geometry where the momenta of all three electrons (the incident and two outgoing electrons) are within the same detection plane (psi = 0A°, figure 2.1).
The power supplies for the electrostatic lenses in the electron gun and the electron analyzers are fully computer controlled and computer optimized, allowing for automated tuning at regular intervals, with the analyzers being re-optimized each time they move to a new angle. The energy of the spectrometer was re-calibrated at the start of each new kinematic arrangement, by measuring the coincidence binding energy spectrum. Over the course of this study the binding energy spectra were recorded for various energies and geometries, and it is estimated that contamination from neighbouring orbitals was always less than 10%, and is more typically in the range of 0.5%.
The distilled water sample used to provide the molecular target beam was contained within a 50mm diameter 100mm long stainless steel vessel sealed by a CF-70 flange to a 6.35mm swagelok fitting.
The sample vessel and gas handling line were held at a constant temperature of 50A?C throughout data collection, so as to create sufficient driving pressure for the target beam. The purity of the target beam was verified with a Spectra VacScan mass spectrometer fitted to the scattering chamber. The background pressure within the scattering chamber was set to 1.1 x 10-5 torr during operation, and was found to remain constant throughout all data runs.
During these experiments we observed an unusual behaviour of the tungsten hairpin filament used as the incident electron source.
To facilitate this, the current measured by the Faraday cup located on the opposite side of the interaction region to the electron gun was monitored by the computer control software, and the current through the filament adjusted to maintain a beam current of 300nA throughout data collection.
In the present study we also measured the coincidence energy resolution from ionization of helium, and found this did not change, indicating that the temperature of emission remained approximately constant. The data presented in figures 3-5 were then averaged over these angular sweeps, and the uncertainties in the measurements determined from the complete set of data for each scattering angle. The experimental data are not measured on an absolute scale and so experiment and theory are normalized to a maximum of unity at each energy, as shown in figure 2.2.
As the energy of the outgoing electrons is lowered, it would be expected that the Coulomb repulsion between the outgoing electrons should play an increasingly important role, driving the electrons apart. The best agreement between experimental data and theory is at the lowest energy, where the experimental data and MDW model are in excellent agreement for the binary peak. A key advantage of the spectrometer in Manchester is the ability to measure data for kinematics in non-coplanar geometries. Non-coplanar measurements were hence taken here with both outgoing electrons having an energy of 10eV. As shown in figure 1, the geometry adopted in this spectrometer provides a common normalization point (xi1 = xi2 = 90A°) for all gun angles psi, which allows ALL data at a given energy to be referenced to a common point. For the current measurements, the coplanar data have been normalized to a maximum of unity, as before. The data in figure 2.3 show a clear trend indicating the binary and recoil peaks diminish in magnitude as the angle of the electron gun angle increases. The data contrasts strongly with the theoretical models for the larger gun angles y, where the theories predict significantly more structure than is seen in the data. The final kinematic configuration used symmetric geometries and 20eV excess energy as above, however in this case the data are for unequal energy sharing between the outgoing electrons.
The data were only taken for coplanar and perpendicular plane geometries, so as to contrast differences in these two extremes. The key differences that can be seen in these data for the coplanar geometry are that the binary peak moves to a smaller angle as the energy asymmetry increases, as might be expected from post collisional interactions. Agreement is mixed, and rather surprisingly gives best results at low energies, where it might be expected that the approximations are least accurate.
The experimental results for both equal and non-equal energy sharing in the perpendicular plane show almost no structure, whereas the theoretical calculations predict that three clearly defined lobes should be seen. This work was supported by the University of Manchester and the US National Science Foundation under Grant.
12.A A  Naja A, Staicu-Casagrande E M, Lahmam-Bennani A, Nekkab M, Mezdari F, Joulakian B, Chuluunbaatar O and Madison D H 2007 J. Zhang Y, Liu D, Chen X, Li J, Li L, Bian Z, Sun F., Lu J, Yin Y, Cai X, Sun Q, Wang K, Ba Y, Wang Q, Wang D, Yang J, Liu P, Xu T, Yan Q, Zhang J, Zen K, Z?hang CY. Hu YW, Hu ZJ, Zhang K, Wang L, Zhai Y, Zhou QJ, Lander G, Zhu J, He YZ, Pang XY, Xu W, Bartlam M, Dong ZY, Sun F.*. Shi N, Ye S, Bartlam M, Yang M, Wu J, Liu Y, Sun F, Han X, Peng X, Qiang B, Yuan J & Rao Z.
He H, Ding Y, Bartlam M, Sun F, Le Y, Qin X, Tang H, Zhang R, Joachimiak A, Liu J, Zhao N&Rao Z.
77.Xu X, Zhai Y, Sun F, Lou Z, Su D, Xu Y, Zhang R, Joachimiak A, Zhang XC, Bartlam M, Rao Z. Import charges previously quoted are subject to change if you increase you maximum bid amount.
Little is known of this important German cartographer, probably from Nuremberg, who worked in Italy from 1480 to 1496 and produced a number of important manuscript maps.
No meridians, parallels or scales of longitude are given, but estimates based on measurements of the map indicate about 230A° from Lisbon to the coast of China, or 240A° from the Canaries. The actual latitude of the Cape of Good Hope is 34A° 22a€™ south based on land measurements by Diaz, who landed three times on the south coast.
He reported to the same Most Serene King that he had sailed beyond Yan 600 leagues, namely 450 to the south and 250 to the north, up to a promontory which he called Cabo de Boa Esperanza [Cape of Good Hope] which we believe to be in Abyssinia. It indicates that he was high in the confidence of the King as an expert cartographer, otherwise he would not have been present at such a secret occasion.
It was done probably in Seville after he joined his brother, entering the postil in Imago Mundi and altering his prototype map at the same time. It seems that the prototype originally showed the Cape at 35A° south, well clear of the frame at about 41A° south, as one would expect of a competent cartographer. It is a relic of the continuous coastline that linked Southeast Asia to South Africa in Ptolemaic world maps that displayed a land-locked Indian Ocean, and it needs a name to identify it in argument. This is the India that Columbus was looking for, because it was marked in the right place on his maps.


In the post-Columbian series, the isthmus of Panama is represented with its true width, because it had been heard of by Columbus and other explorers from the aborigines; in the pre-Columbian series, the union of the peninsula with Asia is much broader, because nobody had exact information about it. The pre-Magellanic maps have South America extending only to some degrees South; on post-Magellanic maps the land extends to 53 degrees South. On these pre-Columbian maps, the drainage net is much better drawn than on any other representation made before 1850.
So Gallez believes that the deep and sound European knowledge of South America before its exploration by Columbus and his Spanish and Portuguese challengers has been firmly established. But the detail of its hydrographic features mapped by Martellus in 1489 is a fact, even if this fact remains historically unexplained. In this way we have identified the Dragona€™s Tail on three maps drawn between 1440 and 1470.
As cultured persons, both Pigafetta and Magellan would have seen such maps as Walspergera€™s or others of the same family, and they would surely have taken aboard some copies of them. Long in the possession of a family from Lucca, it went to Austria in the 19th century and was bought for Yale in 1961.
Vietor, then Map Curator of Yale University, reported a gift by an anonymous donor a€?in the form of a magnificent painted world map signed by Henricus Martellus, approximately six feet by four feet (180 x 120 cm). In a private communication of June 1972, Vietor stated that X-ray examination had revealed no evidence of printing on the paper sheets and that it was hand-drawn, lettered and colored.
It was not foretold on Folio 1 and is clearly an unexpected addition to the codex of picture-islands. He was engaged in building up a large map of the world based on Donus Nicolaus and on Portuguese charts. On his globe, South Africa, between 23A° and 28A° south, extends a horn of land for hundreds of miles due eastward into the Indian Ocean.
Among the thousands of islands Marco Polo reported off the coast of Asia, an enormous Sumatra and Java are found in the south, while to the northeast is the huge island of Cipangu [Japan].
The map is remarkable for its exciting new information, although being imperfect because of its acceptance of classical and medieval antecedents.
On the world map in his Insularium at the British Library, he shows the results of Bartholomew Diasa€™ rounding of the Cape of Good Hope in 1488, listing the names of the various ports and landmarks along the way. This was the edge of Ptolemya€™s map - he did not show the full extent of Asia, noting that a€?unknown landsa€? lay beyond.
In the north, Greenland is a long, skinny peninsula attached to Europe and north of Scandinavia, a concept derived from the Claudius Clavus map of 1427.
One of the Insularium manuscripts at the Laurentian Library in Florence seems to be a working copy, as it has many cross-outs and corrections on the maps and in the texts. His intelligent effort to reconcile modern discoveries with traditional knowledge, especially Ptolemy, provides a workable model for the world map in a time of rapid change.
He worked in Florence prior to 1480, then was away from Italy for about two years before returning to his home town where he was active until his death some time after 1513.
The cartography of such maps is very poor: for instance, on the maps of Hieronymo Girava 1556, Johann Honter 1561, Giacomo Gastaldi 1562 and Francesco Basso 1571, the Rio Amazonas has its source in Patagonia and flows from south to north.
Coplanar symmetric and asymmetric electron impact ionization studies from the 1b1 state of H2O at low to intermediate impact energies. The experimental data show a wide variation in the cross section over this range of energies. These ionizing collisions are important in a wide range of different areas, ranging from plasma physics, astrophysics, atmospheric physics, medical and biological processes involving low energy electrons through to the study of high voltage discharges. The scattered electron is then detected in time correlated coincidence with either the electron ejected during ionization, or with the resulting ion. This is usually accomplished by determining a cross section that is five fold differential in angle and energy. In most cases, this means that an averaging over the orientation of the target must be included for theory to compare with experimental results.
This energy region (from threshold to ~200eV) is important as it is here that the cross section for ionization is largest.
The ionization potential from these ground ro-vibrational states is usually less defined than for atomic targets, due to the associated Franck-Condon overlap between the potential energy curves of the neutral molecules and the resulting ions. This apparatus is described in detail on other web pages on this fileserver, and has been designed to operate in the energy regime from ~10eV to ~300eV. In this configuration, the energies selected for the scattered and ejected electrons were equal. The inner diameter of this flask was 9mm, and the outside diameter was 12.7mm, so that a standard swaged fitting could be used. This was accomplished using a Newport model 325 temperature controller, which supplied drive current to the TEC. This proved invaluable, as it was then possible to continuously monitor the background gases in the chamber during operation. In this example, the analyzers were set to pass electrons of energy 20eV, and a symmetric geometry was chosen with thetaa = thetab = 45A°. Over this period of time, the filament current driving the cathode had to be steadily decreased, probably since the water vapour within the vacuum chamber slowly reduced the diameter of the filament. The data is normalized to unity at thetaa = thetab = theta = 45A°, since the results have not been placed on an absolute scale. Results were taken in symmetric coplanar and non-coplanar geometries, with both equal and non-equal outgoing electron energies.
The human body, and other biological material comprise of ~80% water, which makes it an ideal test case to investigate processes occurring in the body.
These models are an active area of research since the observation that high energy radiation that is used to treat cancers also liberates many low energy electrons, causing additional damage to cell DNA. Knowledge of the collision dynamics of low energy electrons with biological systems is hence needed, so as to develop robust models of these processes.
In such experiments the energy and momenta of the outgoing electrons are measured, giving a five fold differential cross section. In this regime these processes must be considered on an equal basis, and so the complexity of the interactions means that theoretical studies have mainly been limited to atomic targets. This contrasts to atoms which have a single nuclear scattering centre, and which can hence be described using a spherical basis.
A further challenge arises since the experiments cannot, at present, align the molecules prior to the collision, so the models must consider the random orientation of the targets for accurate comparison. The majority of data is recorded in a coplanar geometry, where the incident and two outgoing electrons are in the same plane, and were conducted at a higher incident energy than the studies presented here. The symmetry of the 2py oxygen atomic orbital, representing the lone pair of electrons on the oxygen atoms, prevents it from hybridizing with the H atomic orbital, leaving the molecular 1b1 HOMO orbital essentially atomic like, and therefore symmetric.
However, the orientation averaged molecular orbital used in the theoretical calculation is a bad approximation for that state given the cancellations due to the orbital symmetry. The molecular orbital used in the model therefore should not suffer from the same cancellation problem during the orientational averaging procedure. This apparatus is fully computer controlled and computer optimized, allowing it to operate continuously without user intervention.
A coplanar geometry (psi = 0A?) is defined when all three electrons are in the detection plane.
The angular resolution of the apparatus is estimated as A±3A°, based on geometric considerations of the electrostatic lenses at those energies.
Several freeze-pump-thaw cycles were performed using a salted ice slurry bath, to remove dissolved gas impurities from the water prior to admission into the scattering chamber. Over time the emission current from the filament dramatically increased, when a constant current was delivered to the filament. The data were normalized to a collection time of 1000sec for each measurement, and up to 30 sweeps of the detection plane were used to produce statistically significant results. The overall shape of the TDCS measured at corresponding energies in a previous study of the 1b1 state are qualitatively similar, however the 1b1 state shows a second peak in the binary region emerging at higher energies that is not observed in the 3a1 state.
PCI would also be expected to shift the recoil peak towards xi = 90A°, although this cannot be confirmed in the data. This agreement diminishes as the energy increases, which is unexpected since the MDW model is usually more accurate at higher energies.
The TDCS measured in the perpendicular plane is almost constant over all analyzer angles, which is very different to what is observed for atomic targets. The progression in both models shows a decrease in cross section from psi = 0A° to 45A°, after which the intensity once again increases. There also appears to be a narrowing in the main binary peak as the asymmetry increases, with a new shoulder appearing around xi = 60A°. This contrasts markedly with the calculations, which predict triple peaks in the perpendicular plane that change magnitude only marginally with the asymmetry. This discrepancy is seen both for equal energy and for non-equal energy data, which have been taken in coplanar and perpendicular geometries. C-terminal motif within Sec7 domain regulates guanine nucleotide exchange activity via tuning protein conformation. The Role and Structure of Carboxyl-terminal Domain of the Human Voltage-gated Proton Channel HV1.
Crystallization and preliminary X-ray analysis of a novel esterase Rv0045c from Mycobacterium tuberculosis.
C.* (2008) Crystal structure of human ERp44 shows a dynamic functional modulation by its carboxy-terminal tail, EMBO Rep. A Statistical Analysis of Protein-Protein Interaction with Knowledge-Based Potential at Residue Level.
If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. Ptolemya€™s geographical writings, largely unknown to Western Europeans during the earlier Christian Middle Ages in Europe, became the basis for the Renaissance in geography.
His entire hopes of gaining support from King John in 1485 for such an enterprise as sailing westward to Cathay rested on his argument that it lay only 130A° to 140A° to the west. A manuscript copy of Polo and his travels was given by the Doge of Venice to Prince Pedro in 1427 and was thereafter in the Kinga€™s Treasury in Lisbon.
Measurements of altitudinal height of the sun by astrolabe or quadrant were accurate on land but could be 2A° or more out on the rolling deck of a ship.
23 is in the handwriting of Bartholomew, and was identified as his by Bishop Bartolomeo de Las Casas, who knew him well.
He says that in this place he found by the astrolabe that he was 45A° below the equator and that this place is 3,100 leagues distant from Lisbon [19,850 km]. It was to influence the Catholic Sovereigns who were in the dark owing to the intense secrecy by Portugal regarding discovery. There is no record extant of anyone reporting that they had seen any land or island south of the equator, nor did anybody pretend to have explored the inner part of a trans-Atlantic continent and to have mapped its rivers. We may thus believe that this knowledge already existed before Martellus, and we should look at older maps in search of the sources that he could have had at his disposal. They thus knew that, following their maps, they would have to sail to the south along the coast of the Dragona€™s Tail until they reached the Land of Giants, and that at the end of that land, they would find a passage to the West, to the Sinus Magnus, and thus a way to the Moluccas.
It shows a great deal more ocean to the east of Asia with several large islands in it, including Japan in the far northeast. Signora Carla Marzoli of Milan, in a private communication, stated that this large map a€?had left Italy into the possession of family centuries ago and had been lodged in a Swiss bank for safety, for a long time.a€™ In 1959, through trade channels, she learned that this map was for sale.
It uses the homeopathic (heart-shaped) projection, as far as can be judged, for it lacks meridians and parallels and scales. They all omitted Cipangu but he found a separate map of Cipangu in a codex which had the same outlines as those in the Behaim globe of 1492.
It was, like all important maps at that time, drawn on sheets of parchment which could be joined together almost invisibly, and mounted on linen. In the Indian Ocean, the islands of Madagascar and Zanzibar, rather poorly drawn, add an intriguing aspect. It was the most accurate delineation available to Martin Behaim when he constructed his globe exhibiting the pre-Columbian world. On the Martellus map there is a long peninsula to the east of the Golden Chersonese (Indochina), featuring the mysterious port of Cattigara. The Mediterranean and Black Seas and the Atlantic coasts are taken from sea charts, while the east coast of Africa, as yet unexplored, also follows Ptolemya€™s design. Here the habitable world is extended to 265A°, with northern Asia coming right up against the right-hand border. According to historian Chet Van Duzer who is participating in a new (2014) digital image scanning of the Yale Martellus, a€?In northern Asia, Martellus talks about this race of wild people who dona€™t have any wine or grain but live off the flesh of deer and ride deer-like horsesa€?. The role of experience was clearly important to Martellus, for in his copy of the Laurentian Insularium he includes a verse about his own travels, noting that he has been traveling around for many years, and adding that it is worthwhile but difficult to set a white sail upon the stormy sea.
It is a cleanly-engraved copperplate, with finely-stippled sea and six characteristic loose-haired wind-heads grouped round the border of the map.
A legend at the bottom referring to the date 1498 is clearly an error for 1489, and has been copied as such from the 1489 Martellus manuscript world map with obviously similar geographic content to that of Rosselli. These maps depicted graphically the theory that Cipangu [Japan] was but 3,500 miles (5,635 kilometers) westward, and only 1,500 miles (2,415 kilometers) further lay the shores of Cathay [China]. 23 is in the handwriting of Bartholomew, and was identified as his by Bishop Bartolomeo de Las Casas, who knew him well.A  Arthur Davies has made a long study of the writing of the Columbus brothers and states, without a shadow of doubt that it is in the hand of Bartholomew. Theoretical approximations accurate at high impact energies can no longer be applied, and so there are stringent demands on theory which must be satisfied for accurate comparison with data. The (e,2e) coincidence signal for molecules may then have a correspondingly lower yield compared to an atomic target where the ionization potential is well defined. A pictorial representation of the water molecule in the 1b1 state is given in figure 1.1 below. The spectrometer allows measurements to be conducted from a coplanar geometry through to the perpendicular plane, although in the present measurements only a coplanar geometry was used. The analyzer pass energy was then set to measure electrons so that the overall resolution of the coincidence signal (as measured using a helium atomic target) was 600meV.
The pump removed background gas from the flask, and extracted dissolved gases held in the water.
The flask was secured to the cold side of a 50mm x 50mm thermo-electric cooler (TEC) using a large aluminium block, and the assembly (flask + block) was insulated from the air using Styrofoam.
The 1b1, 3a1 and 1b2 states are clearly resolved in this spectrum, which is fitted to three Gaussian peaks to ascertain the widths of the spectral profiles. These data were measured in a coplanar geometry with outgoing electron energies of 20eV detected at theta1 = theta2 = 55A°. Figure 1.5(a) shows the lowest energy results, with an incident energy 15eV above the ionization threshold. Molecular wave-functions are generally not spherical, the nuclei within the molecule providing multiple scattering centres.
This becomes a computationally intensive problem, and so approximations are usually made to allow these calculations to become tractable.
In this study the analyzers were always kept in a symmetric configuration with xi1 = xi2 = xi. A needle valve at the entrance to the scattering chamber controlled the flow of target H2O vapour into the interaction region.
This indicates that an H2O target molecular beam of high purity was created, as confirmed from binding energy spectral studies. This increase in emission current was often more than a factor of 2 within a 24 hour period. The solid line shows results from the Molecular Distorted Wave Born Approximation (MDW) while the dashed line was generated from the Molecular 3-body Distorted Wave Approximation (M3DW). This trend is much clearer in the present data compared to that from the 1b1 state measured at higher energies. For the theoretical model, the coplanar TDCS has also been normalized to unity for both MDW and M3DW models. These measurements were taken in a series of symmetric non-coplanar geometries with outgoing electron energies of 10eV.
The M3DW model follows a trend that is closer to the experimental data, although neither model accurately predicts the results that have been obtained.
The theoretical calculations are also shown, where once again the data and theory have been normalized to unity at the peak in the coplanar geometry. The minimum around 90A° in this geometry does not change substantially as the energy sharing changes. Dodecamer Structure of Severe Acute Respiratory Syndrome Coronavirus Nonstructural Protein nsp10. New Antiviral Target Revealed by the Hexameric Structure of Mouse Hepatitis Virus Nonstructural Protein nsp15.


Crystal structure of the N-terminal SH3 domain of mouse betaPIX, p21-activated kinase-interacting exchange factor.
Insights into SARS-CoV transcription and replication from the structure of the nsp7-nsp8 hexadecamer.
Structural Basis for the Specific Recognition of RET by the Dok1 Phosphotyrosine Binding Domain.
Expression, crystallization and preliminary X-ray studies of the recombinant PTB domain of mouse dok-1 protein. Site-directed Mutagenesis and Preliminary X-ray Crystallographic Studies of the Tabtoxin Resistance Protein. Crystal Structure of Tabtoxin Resistance Protein Complexed with Acetyl Coenzyme A Reveals the Mechanism for ?­Lactam Acetylation. Crystallization and preliminary X-ray analysis of recombinant histone HphA from the hyperthermophilic archaeon Pyrococcus horikoshii OT3. The Martellus delineation included some Ptolemaic dogma in its continental contours and projection but significantly modified and improved upon the ancient model with regards to its contents.
The coast of Cathay is approximately 130A° West of Lisbon on the Martellus map, on the Behaim globe and in the Columbus-Toscanelli concept.
Copious marginal notes, in the handwriting of Bartholomew and his older brother Christopher, are found in the Admirala€™s copy of the printed book of Marco Polo published at Louvain between 1485 and 1490. The coasts charted by Diaz have been fitted into the circular outline of the world of the Fra Mauro hemisphere, representing such a marked trend to the southeast that the Cape of Good Hope seems to be due south of the Persian Gulf, whereas it is due south of the Adriatic. Yet the Martellus map shows South Africa extending across the frame of the map to 45A° south. He has described this voyage and plotted it league by league on a marine chart in order to place it under the eyes of the Most Serene King himself. This dates the legend as 1489, probably in January of that year, just before Bartholomew went to Seville. Arthur Davies, in his discussion of this map refers to it as the Tiger-leg peninsula; in others it is referred to as Catigara. The best preserved copy is in the British Library and there is also a poorer copy in the University of Leiden.
Considering that in 1489 Martellus knew about the inner courses of many South American rivers, we have no reason to doubt that, forty years earlier, Andreas Walsperger (#245) knew of the Patagonians. The meeting with the Tewelche in Saint Julian was the full confirmation, for Magellan and Pigafetta, of what they already knew from their maps. The Laon globe (#259), made in France about 1493 (probably by Bartholomew Columbus when he served Anne, Regent of France) has the Tiger-leg to 40A° south. She examined it and saw its connection with the Martellus map in the British Library and with the conceptions of Columbus. Fortunately, Martellus copied most of the nomenclature and legends on to the smaller map, now in the British Library, so the a€?Yalea€™ Martellus can recover them without difficulty.
Next come three regional maps, striking because of the enormous nomenclature on the coasts. The three manuscript maps were larger in scale and showed more detail than the codex world map. This large map, 180 cm by 120 cm, formed a standard Portuguese world map, continually added to by new discoveries, including those of CA?o and Diaz. Some historians claim that their presence indicates the map cannot be dated before 1498, when Vasco da Gama returned with news of his voyage to India. Modern Africa is so long, however, that it breaks through the frame at the lower edge of the map. Unlike Ptolemya€™s Asia, Martellusa€™ version has an eastern coast with the island-bedecked ocean beyond and additional names taken from Marco Polo. From this we can see that in the Insularia Martellus used modern information when he had it, incorporating it into a classical format. Martellusa€™s depiction of rivers and mountains in the interior of southern Africa, along with place names there, appear to be based on African sources.
He suggests that the reader might prefer to stay safely at home, and learn about the world through his book.
Like its model, the projection is the barrel-shaped (homeoteric, or modified spherical) a€?second projectiona€™ of Ptolemy. Columbus thus had documentary support for his beliefs about oceanic distances from his readings of earlier cosmographers, Cardinal Da€™Ailly (#238) and Paolo Toscanelli (#252). Its shape, outline and position are identical with the representation of Cipangu on the Behaim globe. The angles that could be accessed in this configuration ranged from thetaa = thetab = 25A° through to thetaa = thetab = 135A°.
The acceptance angle of the analyzer lenses was A±3A°, as set by input apertures at the entrance to the electrostatic lenses.
This de-gassing procedure was carried out for ~2 hours before the water sample was used in the experiment, to ensure that the proportion of dissolved gases in the water was minimized.
The hot side of the TEC was attached using thermal conducting paste to an aluminium heatsink to which a 12VDC boxer fan was secured, so that heat from the TEC could be dissipated efficiently. If this ratio reduced, the experiment was halted and the water changed to a newly de-gassed sample. In this case, the 1b1 state was found to have a width of 620meV, which is comparable to that for an atomic target.
The contrast between the maximum and minimum in the cross section increases as the energy increases.
As the energy increases further to 95eV above threshold (figure 1.5(c)), the double peak in the forward direction is still visible but the magnitudes of the peaks are now different.
The purity of this beam was monitored regularly using the mass spectrometer throughout this study. To ensure constant incident electron beam current throughout the measurements as required, the filament current was hence also placed under computer control.
The experimental and theoretical data has been independently normalised to unity at each energy.
Dr Kate Nixon thanks the British Council for funding under the research exchange programme, and the Royal Society for a Newton International Fellowship. Kimble demonstrated that, as far as 13A° South, the nomenclature of West African coasts is 80% identical in the two maps but bears no relation to the nomenclature of any other map of the period. The minor differences in location between these three must be seen against the enormous exaggeration of the extent of Eurasia which they exhibit in comparison with all previous estimates.
The only other claim that the Cape was at 45 degrees south is in the hand of Bartholomew Columbus.
It suited Columbus admirably and it is likely that Bartholomew made the change at his direction. It is shown to more than 25A° south in the Cantino map of 1502 (Book IV, #306), Canerio map of 1504 (Book IV, #307), the WaldseemA?ller maps of 1507, 1513 (Book IV, #310) and many others. The map is surrounded by a dozen puffing classical wind heads, and for the first time in a non-Ptolemaic map, there is a latitude and longitude scale on the side. At her request, Roberto Almagia and Raleigh Skelton examined it and pronounced it authentic.
The first is of Western Europe and Morocco, cut off in the east through the center of France; the second starts from this line and extends east as far as Naples and Tunis. The Martelli were a prominent merchant family in Florence, and Enrico Martello sounds Italian enough.
If the two Ptolemy atlases can be dated as the first and last of his works, it is interesting to see that he reverts to the pure Ptolemaic form for the world in the later edition, with the lengthened Mediterranean and the closed Indian Ocean.
Ita€™s likely that this information came from an African delegation that visited the Council of Florence in 1441 and interacted with European geographers. This provided him with the ammunition to further promote his plan to sail west to reach the Indies. The Martellus map in the British Library is less than 20 inches (50 cm) from west to east, and is on a scale one-quarter that of the Yale map. For asymmetric geometries, thetaa is fixed at 22A° while analyzer 2 is swept around the scattering plane. A glass flask was used for this procedure as this allowed the process to be visually monitored. This indicates that the energetic effects of ro-vibrational transitions from the ground state to the ion state are negligible for this state.
Further checks were made regularly on the energy of the incident electron beam by monitoring the coincidence energy spectrum (figure 1.3), and regular monitoring of the partial pressures of the gases in the vacuum chamber. A second peak occurs in the backscatter region, however the maximum of this peak appears to occur at thetab < 225A°. For non-coplanar geometries the electron gun is lifted out of the plane, and is defined by the angle psi. South of that limit, however, the Martellus map gives the outlines and nomenclature of the voyage of Bartholomew Diaz in 1487-88, while the Behaim globe has invented nomenclature corresponding to nothing in Portuguese cartography.
It is difficult to avoid the conclusion that he copied a map which was originally designed to support the ideas of Columbus. Due south of the Malay peninsula, at 28A° South, there appears an enormous peninsula which widens and turns north to join China again with the largely circular concept of the Fra Mauro map. On the face of it, seeing it on the Martellus map, it asserts that Diaz had proceeded north along the cast coast of South Africa to beyond Natal. Columbus hoped Spain would support a voyage westward to Cipangu, 85A° away, and to Cathay 130A° to the west. Of course, this is mostly symbolic, as neither Henricus Martellus nor anyone else had a complete set of accurate coordinates.
The sheets of the a€?Yalea€™ Martellus, together with certain regional maps, were acquired by the patron. The one piece of information he gives us about himself, that he had traveled extensively, suggests a career in business. Again, with the Tigerleg or the Dragona€™s Tail, there has been an controversial attempt to identify it as an early map of South America, turning Ptolemy's a€?Sinus Magnusa€? into the Pacific Ocean. Clearly, Ptolemy maps were considered as illustrations for a revered and ancient text and did not have to include the latest news.
Three other surviving maps contain some of this same information, but the Martellus map covers more territory than any of them, making it the most complete surviving representation of Africansa€™ geographic knowledge of their continent in the 15th century. The splendid manuscript of Martellus preserved in the National Library at Florence contains thirteen tabulA¦ modernA¦, but is probably later than the earliest printed editions of Ptolemya€™s Geography.A  However, Martellus revised the Ptolemaic world map based on Marco Poloa€™s information on Asia, and he incorporated the recent Portuguese voyages to Africa. Due south of the Malay peninsula, at 28A° South, there appears an enormous peninsula which widens and turns north to join China again with the largely circular concept of the Fra Mauro map.A  This peninsula does not exist in fact, and seems to be a repeat of the Donus Nicolaus map of the world in the Ulm Ptolemy, cut away by the circular outline of Fra Mauro. On the face of it, seeing it on the Martellus map, it asserts that Diaz had proceeded north along the cast coast of South Africa to beyond Natal.A  His furthest point, in fact, was the Rio de Infante [Great Fish River] on the south coast, at 34A° south. Although the Columbus brothers knew that Marco Polo had returned from China by this sea route, they inserted this great obstruction of Tiger-leg by 1485. There is an offset of 1eV in the position of the peaks which is due to contact potentials in the spectrometer. The full line represents a three-Gaussian fit, whereas the dotted lines show the individual Gaussians from this fit, illustrating the degree of separation measured with the current energy resolution. The results in the backward direction also have structure, with a minimum occurring when thetab ~ 250A°. The correspondence between the Behaim globe and the 1489 Martellus map consequently ended in 1485, when Diego CA?o had returned from his first voyage after reaching 13A° south (Cape Santa Maria in the Congo, 1482-1484).
Yet that map could not have been completed until early in 1489 for it had complete details of the discoveries of Bartholomew Diaz in his voyage of 1487-88, when he circumnavigated the Cape of Good Hope (capo da€™ esperanza) and reached the Indian Ocean. At that latitude one degree was thought to be 50 miles (80 km), according to the Toscanelli letter, so that Japan was only 4,250 miles (7,200 km) west.
No wonder that, having regard to his maps, he concluded that this river flowed from Paradise. Martellus assembled the paper sheets, stuck them on a canvas backing, made his characteristic rectangular picture frame for it and colored the seas in dark blue. His surviving work includes two editions of Ptolemya€™s Geography, a large wall map now at Yale University, and five editions of the Insularium Illustratum of Cristoforo Buondelmonti. The correspondence between the Behaim globe and the 1489 Martellus map consequently ended in 1485, when Diego CA?o had returned from his first voyage after reaching 13A° south (Cape Santa MariaA  in the Congo, 1482-1484). It would show King John that even if the Portuguese reached India they could not reach the Spice Islands (which were on the equator east of Tiger-leg) without having to make long voyages into the southern stormy seas. To have included Cipangu would have required a scale reduced one-sixth, too small to permit of legible nomenclature. Very little contamination is expected from neighbouring orbitals in the measured TDCS for the 3a1 state. This was the time when Martin Behaim, as a member of the King Johna€™s mathematical junta, was able to study the map and proposals of Columbus. He returned from this voyage in December 1488 and, within a year, full details, including rich nomenclature, had appeared on the map of Martellus made in Italy; this despite the utmost secrecy on the part of King John of Portugal. The fact that the map had been put away in a Swiss bank for perhaps 60 years explains why it went unobserved. Martellus had been required by his patron to include in the codex a world map and regional maps which had just come into his possession in 1489. The historian Roberto Almagia has pronounced that Henricus Martellus was an excellent draftsman, who drew upon the latest information and improved the maps he adapted for his collections. This was the time when Martin Behaim, as a member of the King Johna€™s mathematical junta, was able to study the map and proposals of Columbus.A  On the 1489 Martellus map there is an inscription next to the Congo that mentions the commemorative stone (PadrA?o) that CA?o erected at Cape Negro during his second voyage (1485-87) when he reached as far as Cape Cross. For King John and for the Catholic Sovereigns it showed that Spain could easily reach Cathay and then the Spice Islands, secure from all interference from Arabs or Portuguese in the Indian Ocean.A  Columbus may have deceived himself regarding the existence of the Tiger-leg but, since it suited his plans so admirably, one suspects that he asserted its existence just as he later made the Cape of Good Hope to be at 45A° south. The second major difference is that, while the coasts from Normandy to Sierra Leone, on the Yale map, are based on the world map of Donus Nicolaus of 1482, the corresponding coasts on the British Library Martellus uses a Portuguese map for them. The furthest point reached by Diaz, the Rio de Infante [the great Fish River], is duly recorded as ilha de fonti.
His great talent for such an exacting task was his skill as a draughtsman-cartographer experienced in altering the scale of maps of islands that he was copying. Someone with access to it and to the reports of Bartholomew Diaz, drew the prototype of the Martellus map. According to the historian Arthur Davies, this is conclusive evidence that the prototype originally terminated at 35A°, with the legend correctly placed near it. Even today, the best source for information on the voyage of Diaz is the Martellus map of 1489.
The extra ten degrees in shifting the Cape to 45A° south meant more than twenty degrees extra distance in a voyage to India. Two peculiar features in the region of South Africa suggest that Bartholomew Columbus was that someone.
When Bartholomew altered the prototype map to 45A° south, he was unable to remove the legend. The policy of secrecy of King John was shattered in one great leakage by someone in a unique position to know all the details. Moreover, and perhaps this was the decisive factor, it would take Portuguese ships to nearly 50A° south to round Africa, into what Diaz had already found to be the roughest seas encountered anywhere in the world. Moreover, and perhaps this was the decisive factor, it would take Portuguese ships to nearly 50A° south to round Africa, into what Diaz had already found to be the roughest seas encountered anywhere in the world.A  Bartholomew, in 1512, gave evidence in the Pleitos (the great lawsuit of the Columbus family versus the Crown of Spain) and declared that he had gone about with his brother in Spain helping to gain support for his enterprise. Each island-picture is surrounded by a frame, drawn and painted in ivory to give the impression of a carved wood frame, suggesting a picture hanging on a wall. Such picture-islands occupy nearly all the folios, making an Atlas of Islands, and are then followed by a superb picture-map of Italy, taken from the 1482 world map of Donus Nicolaus. The islands in this codex were copies from the Ulm Ptolemy, from the Isolario of Bartolomeo de li Sonetti printed in Venice in 1485, and from other sources. This account of Gallo was copied, almost verbatim by Serenega in 1499 and by Giustiniani in 1516.
Bartholomew left Genoa as a youth in 1479 and officially made only one further visit to Italy, in 1506. Gallo could have acquired knowledge of the role of Bartholomew only from his own lips, in 1489.



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