Entre las causas y las razones: sobre la explicación social y sus límites

"Este texto es el resultado de las reflexiones teóricas suscitadas por mi participación en el proyecto SEC96-0639 del Plan Nacional de I+D, dirigido por Ludolfo Paramio. No quiero dejar de agradecer los detallados comentarios de Antonio Niño Rodríguez y Leopoldo Moscoso Sarabia a los dos borradores previos".ME

Синтез в воздушной плазме и исследование оксидных композиций «оксид неодима–оксид самария – оксид магния»

Цель работы – моделирование и исследование процесса плазмохимического синтеза оксидных композиций в воздушно-плазменном потоке из диспергированных водно-органических нитратных растворов неодима, самария и магния. В работе были определены составы растворов ВОНР и режимы их переработки в воздушно-плазменном потоке, обеспечивающие плазмохимический синтез наноразмерных оксидных композиций из диспергированных водно-органических нитратных растворов неодима, самария и магния.The purpose of the work is to simulate and study the process of plasma-chemical synthesis of oxide compositions in an air-plasma stream from dispersed aqueous-organic nitrate solutions of neodymium, samarium and magnesium. In this work, the compositions of the VONR solutions and the modes of their processing in the air-plasma flow were determined, which ensure the plasma-chemical synthesis of nanosized oxide compositions from dispersed aqueous-organic nitrate solutions of neodymium, samarium and magnesium

Entrance Channel X-HF (X=Cl, Br, and I) Complexes studied by High-Resolution Infrared Laser Spectroscopy in Helium Nanodroplets

Rotationally resolved infrared spectra are reported for halogen atom - HF free radical complexes formed in helium nanodroplets. An effusive pyrolysis source is used to dope helium droplets with Cl, Br and I atoms, formed by thermal dissociation of Cl$_2$, Br$_2$ and I$_2$. A single hydrogen fluoride molecule is then added to the droplets, resulting in the formation of the X-HF complexes of interest. Analysis of the resulting spectra confirms that the observed species have $^2\Pi_{3/2}$ ground electronic states, consistent with the linear hydrogen bound structures predicted from theory. Stark spectra are also reported for these species, from which the permanent electric dipole moments are determined.Comment: 41 pages, 16 figures, 5 table

A high-resolution infrared spectroscopic investigation of the halogen atom-HCN entrance channel complexes solvated in superfluid helium droplets

Rotationally resolved infrared spectra are reported for the X-HCN (X = Cl, Br, I) binary complexes solvated in helium nanodroplets. These results are directly compared with that obtained previously for the corresponding X-HF complexes [J. M. Merritt, J. K\"upper, and R. E. Miller, PCCP, 7, 67 (2005)]. For bromine and iodine atoms complexed with HCN, two linear structures are observed and assigned to the $^{2}\Sigma_{1/2}$ and $^{2}\Pi_{3/2}$ ground electronic states of the nitrogen and hydrogen bound geometries, respectively. Experiments for HCN + chlorine atoms give rise to only a single band which is attributed to the nitrogen bound isomer. That the hydrogen bound isomer is not stabilized is rationalized in terms of a lowering of the isomerization barrier by spin-orbit coupling. Theoretical calculations with and without spin-orbit coupling have also been performed and are compared with our experimental results. The possibility of stabilizing high-energy structures containing multiple radicals is discussed, motivated by preliminary spectroscopic evidence for the di-radical Br-HCCCN-Br complex. Spectra for the corresponding molecular halogen HCN-X$_{2}$ complexes are also presented.Comment: 20 pages, 15 figures, 6 tables, RevTe

Анализ существующих технологий восстановления герметичности эксплуатационной колонны в процессе эксплуатации нефтяных месторождений

Объектом исследования является нефтяная скважина, эксплуатируемая в осложненных условиях на Северо-Останинском месторождении Томской области. Исследование включает в себя такие методы получения информации, как сравнительный анализ, исторические данные и промысловые данные.Полученная информация может быть активно использована при проведении ремонтно-изоляционных работ.Целью данной работы является анализ методов восстановления целостности эксплуатационной колонны при разработке и эксплуатации нефтяного месторождения в Западной Сибири. Рассмотрение причин, вызывающих ухудшение герметичности эксплуатационной колонны.The object of research is an oil well that is operated in complicated conditions at the Severo-Ostaninsky field in the Tomsk region. The research involves such methods of obtaining information as comparative analysis, historical data, and fishing data.The obtained information can be actively used during repair and insulation works.The purpose of this work is to analyze methods for restoring the integrity of the production column during the development and operation of an oil field in Western Siberia. Consideration of the reasons for the deterioration of tightness

Low Q^2 Jet Production at HERA and Virtual Photon Structure

The transition between photoproduction and deep-inelastic scattering is investigated in jet production at the HERA ep collider, using data collected by the H1 experiment. Measurements of the differential inclusive jet cross-sections dsigep/dEt* and dsigmep/deta*, where Et* and eta* are the transverse energy and the pseudorapidity of the jets in the virtual photon-proton centre of mass frame, are presented for 0 < Q2 < 49 GeV2 and 0.3 < y < 0.6. The interpretation of the results in terms of the structure of the virtual photon is discussed. The data are best described by QCD calculations which include a partonic structure of the virtual photon that evolves with Q2.Comment: 20 pages, 5 Figure