Report and preliminary results of METEOR-Cruise M 41/1, Málaga - Libreville, 13.2.-15.3.1998 with partial results of METEOR CRUISE 41/2 Libreville-Vitória, 18.03.1998-15.04.1998

The witness seminar ”The rise and expansion of IT consulting, 1964–1985” took place at The National Museum of Science and Technology in Stockholm on 1 April 2008 and was led by Gunnar Hesse. The panel consisted of representatives of many of the pioneers in Swedish IT consulting, including Lars Irstad, who founded the industry leader Programator in 1964; Lars Spångberg who founded RIAB as an offshoot of the Federation of Swedish Industry in 1968; Thord Wilkne, one of two founders of WM-data in 1969; Göran Garvner who founded Modulföretagen in 1972; Per Olof Persson, a leading figure in Statskonsult, the state-owned firm that was the biggest IT consultancy in Sweden in the 1970s; Kaj Green, the first CEO of Cap Gemini Sweden; Leif Nobel, CEO of Data Logic from 1979, and Hans G. Wahlberg, one of the founders of Enator in 1977. The seminar was divided in three parts. The first dealt with the period of early entrepreneurship up to c. 1975. It was agreed that there was no shortage of demand for consulting services and that the main challenge consisted in recruiting skilled personnel and managing them. The second part dealt with the expansion that set in from the mid-1970s. Here it was agreed that the management of knowledge workers still constituted the single biggest challenge, followed by the need to establish consistency in method. At this point a divergence in business strategy can be seen. WM-data became a provider of American standard applications in order to tie the customer base more tightly. Programator were successful in the minicomputing market and established joint ventures with several large companies, in effect taking over their IT departments. Enator moved up the value chain and aimed at integrating management consulting and IT consulting. By 1985 all the major companies were listed at the stock exchange and the industry may be described as well-established

Differential Transfer Ionization Cross Sections for 50175-keV Proton-Helium Collisions

We have measured coincidences between neutralized projectiles and He recoil ions for 50175-keV proton-helium collisions. From the data we obtained transfer ionization (TI) cross sections differential in the projectile scattering angle. Laboratory scattering angles range from 0 to 2.0 mrad. The experimental method allowed separation of the postcollision charge states of the target atoms. The ratio of the cross sections for TI to the sum of TI and single capture, F, is presented as a function of projectile scattering angle. Comparison is made to previous measurements of this ratio where data is available. The differential cross sections are compared to dynamical classical trajectory Monte Carlo (dCTMC) calculations. Agreement in the shape of the differential cross sections is good between the theory and measurement over the entire energy range

A first map for the River Guadalquivir at 6500 years BP

Se presenta la primicia cartográfica de un mapa costero del golfo, estuario y desemboca-dura del río Guadalquivir hacia el óptimo climático de la Transgresión Flandriense (c 6500 BP). Para su elaboración los autores han desarrollado en una colaboración interdisciplinar de más de veinte años el método y técnicas de observación adecuadas para la consecución de los datos necesarios. Se ofrece el mapa del río Guadalquivir referente a los tiempos de la transición histórica entre el Neolítico y Calcolítico como una contribución al avance del conocimiento de la prehistoria en el ámbito atlánti-co-mediterráneo de la Península Ibérica.For the first time a map of the gulf, estuary and mouth of the Guadalquivir River is presented for the period about 6500 years before present (Flandrian Transgression). In the course of twenty years of interdisciplinary work the authors had to develop the method and appropriate techniques to achieve the necessary information. The map of the Guadalquivir at the time of the Neolithic-Chalcolithic transition should contribute to a better understanding of prehistory of the Atlantic-Mediterranean area of the Iberian Peninsula

The geoarchaeological project “Port of Italica”

Mediante la aplicación de nuevos métodos y técnicas de observación se presentan los resultados de una investigación interdisciplinar que permite delimitar la línea de costa del paleoestuario del río Guadalquivir (hace unos 6500 años). Entre otras primicias científicas se constata la existencia de un lacus por delante del frente de Santiponce, que conectaba con el mar abierto a través de una amplia y profunda ría. Este paisaje paleoestuarino contaba en la orilla acantilada del Aljarafe con una potencia de agua suficiente todavía en época romana para arribar a Itálica por navegación, lo que explica la estratégica ubicación de la ensenada portuaria ocupada por P. Cornelius Scipio Africanus maior después de la batalla de Ilipa (206 a.C.).With the application of new methods and techniques and in an interdisciplinary cooperation, the authors could reconstruct the ancient coastline in the paleo estuary of the river Guadalquivir (around 6500 years before present). Among other results, the existence of a big lake off the town of Santiponce could be proven, which in the course of the river had a wide and deep connection to the open sea. In the area of the cliff near Aljarafe, the water depth in Roman times was sufficient for seagoing vessels to reach Italica. This explains the strategic importance of the access to the port, which was occupied by P. Cornelius Scipio Africanus Maior after the battle of Ilipa (206 BC)

El Proyecto geoarqueológico "Puerto de Itálica"

With the application of new methods and techniques and in an interdisciplinary cooperation, the authors could reconstruct the ancient coastline  in the paleoestuary of the river Guadalquivir (around 6500 years before present). Among other results, the existence of a big lake off the town of Santiponce could be proven, which in the course of the river had a wide and deep connection to the open sea. In the area of the cliff near Aljarafe, the water depth in Roman times was sufficient for seagoing vessels to reach Italica. This explains the strategic importance of the access to the port, which was occupied by P. Cornelius Scipio Africanus Maior after the battle of Ilipa (206 BC).Mediante la aplicación de nuevos métodos y técnicas de observación se presentan los resultados de una investigación interdisciplinar que permite delimitar la línea de costa del paleoestuario del río Guadalquivir (hace unos 6500 años). Entre otras primicias científicas se constata la existencia de un lacus por delante del frente de Santiponce, que conectaba con el mar abierto a través de una amplia y profunda ría. Este paisaje paleoestuarino contaba en la orilla acantilada del Aljarafe con una potencia de agua suficiente todavía en época romana para arribar a Itálica por navegación, lo que explica la estratégica ubicación de la ensenada portuaria ocupada por P. Cornelius Scipio Africanus maior después de la batalla de Ilipa (206 a.C.). &nbsp

Primicia cartográfica del río Guadalquivir hace 6500 años

For the first time a map of the gulf, estuary and mouth of the Guadalquivir River is presented for the period about 6500 years before present (Flandrian Transgression). In the course of twenty years of interdisciplinary work the authors had to develop the method and appropriate techniques to achieve the necessary information. The map of the Guadalquivir at the time of the Neolithic-Chalcolithic transition should contribute to a better understanding of prehistory of the Atlantic-Mediterranean area of the Iberian Peninsula.Se presenta la primicia cartográfica de un mapa costero del golfo, estuario y desembocadura del río Guadalquivir hacia el óptimo climático de la Transgresión Flandriense (c 6500 BP). Para su elaboración los autores han desarrollado en una colaboración interdisciplinar de más de veinte años el método y técnicas de observación adecuadas para la consecución de los datos necesarios. Se ofrece el mapa del río Guadalquivir referente a los tiempos de la transición histórica entre el Neolítico y Calcolítico como una contribución al avance del conocimiento de la prehistoria en el ámbito atlántico-mediterráneo de la Península Ibérica. &nbsp

Ab-initio calculation of the electronic and optical excitations in polythiophene: effects of intra- and interchain screening

We present an calculation of the electronic and optical excitations of an isolated polythiophene chain as well as of bulk polythiophene. We use the GW approximation for the electronic self-energy and include excitonic effects by solving the electron-hole Bethe-Salpeter equation. The inclusion of interchain screening in the case of bulk polythiophene drastically reduces both the quasi-particle band gap and the exciton binding energies, but the optical gap is hardly affected. This finding is relevant for conjugated polymers in general.Comment: 4 pages, 1 figur

Ab-initio prediction of the electronic and optical excitations in polythiophene: isolated chains versus bulk polymer

We calculate the electronic and optical excitations of polythiophene using the GW approximation for the electronic self-energy, and include excitonic effects by solving the electron-hole Bethe-Salpeter equation. Two different situations are studied: excitations on isolated chains and excitations on chains in crystalline polythiophene. The dielectric tensor for the crystalline situation is obtained by modeling the polymer chains as polarizable line objects, with a long-wavelength polarizability tensor obtained from the ab-initio polarizability function of the isolated chain. With this model dielectric tensor we construct a screened interaction for the crystalline case, including both intra- and interchain screening. In the crystalline situation both the quasi-particle band gap and the exciton binding energies are drastically reduced in comparison with the isolated chain. However, the optical gap is hardly affected. We expect this result to be relevant for conjugated polymers in general.Comment: 15 pages including 4 figures; to appear in Phys. Rev. B, 6/15/200