Suchergebnisse

Die Studie dient der ideologisch-theoretischen Vorbereitung des X. Parlaments der FDJ. Ihr Ziel besteht in der Analyse der Ergebnisse der Jugendpolitik (insbesondere Klassenbewußtsein, gesellschaftliche Aktivität, politische und organisatorische Festigung der FDJ), in der Bestimmung wesentlicher Bedingungen, die diese Prozesse fördern bzw. hemmen und in der Erarbeitung bzw. Vorbereitung von Empfehlungen und Folgerungen für die vom X. Parlament zu beschließenden Dokumente zur kommunistischen Erziehung der Jugend. (ZÄ)

Abstract
In this paper, there has been constructed such a model of the non-classical Bittner operational calculus, in which the derivative related to Horadam sequences is understood as a difference operation S{x(k)}: ={x(k+2) - ax(k+1) - bx(k)}.

European Journal of Political Economy 5 (1989) 177-201. doi:10.1016/0176-2680(89)90044-X ; Received by publisher: 0000-01-01 ; Harvest Date: 2016-01-04 12:21:47 ; DOI:10.1016/0176-2680(89)90044-X ; Page Range: 177-201

Computers, Environment and Urban Systems 12 (1988) 13-24. doi:10.1016/0198-9715(88)90004-X ; Received by publisher: 0000-01-01 ; Harvest Date: 2016-01-04 12:21:51 ; DOI:10.1016/0198-9715(88)90004-X ; Page Range: 13-24

Letter from Young to Governor Cumming saying that he cannot guarantee the safety of unpopular government appointees, and approving Cumming's actions. Dated May 8, 1858. ; Electronic version ; 27 x 44 cm folded to 27 x 22 cm ; Typescripts included in folder.

Format: 32 x 41 cm. - Satzspiegel: 26,5 x 30,5 cm ; Im Text wird ein Generalmandat zum Hochwasserschutz aus dem Jahr 1679 erwähnt. - Ausstellungsdatum: München, 1721, 25. Oktober ; Ausst.: Maximilian Emanuel ; Erscheinungsjahr ermittelt aus Ausstellungsdatum ; Ausfuehrliche Beschreibung ; Volltext // Exemplar mit der Signatur: München, Bayerische Staatsbibliothek -- Cgm 2549(2#Bl.2173

Context. High-mass X-ray binaries (HMXBs) are exceptional astrophysical laboratories that offer a rare glimpse into the physical processes that govern accretion on compact objects, massive-star winds, and stellar evolution. In a subset of the HMXBs, the compact objects accrete matter solely from winds of massive donor stars. These so-called wind-fed HMXBs are divided in persistent (classical) HMXBs and supergiant fast X-ray transients (SFXTs) according to their X-ray properties. While it has been suggested that this dichotomy depends on the characteristics of stellar winds, they have been poorly studied. Aims. With this investigation, we aim to remedy this situation by systematically analyzing donor stars of wind-fed HMXBs that are observable in the UV, concentrating on those with neutron star (NS) companions. Methods. We obtained Swift X-ray data, HST UV spectra, and additional optical spectra for all our targets. The spectral analysis of our program stars was carried out with the Potsdam Wolf–Rayet model atmosphere code. Results. Our multi-wavelength approach allows us to provide stellar and wind parameters for six donor stars (four wind-fed systems and two OBe X-ray binaries). The wind properties are in line with the predictions of the line-driven wind theory. Based on the abundances, three of the donor stars are in an advanced evolutionary stage, while for some of the stars, the abundance pattern indicates that processed material might have been accreted. When passing by the NS in its tight orbit, the donor star wind has not yet reached its terminal velocity but it is still significantly slower; its speed is comparable with the orbital velocity of the NS companion. There are no systematic differences between the two types of wind-fed HMXBs (persistent versus transients) with respect to the donor stars. For the SFXTs in our sample, the orbital eccentricity is decisive for their transient X-ray nature. The dichotomy of wind-fed HMXBs studied in this work is primarily a result of the orbital configuration, while in general it is likely that it reflects a complex interplay between the donor-star parameters, the orbital configuration, and the NS properties. Based on the orbital parameters and the further evolution of the donor stars, the investigated HMXBs will presumably form Thorne–Żytkow objects in the future. ; The first author of this work (R.H.) is supported by the Deutsche Forschungsgemeinschaft (DFG) under grant HA 1455/28-1. L.M.O. acknowledges support from the Verbundforschung grant 50 OR 1809. J.M.T. acknowledges the research grant ESP2017-85691-P. A.A.C.S. is supported by the Deutsche Forschungsgemeinschaft (DFG) under grant HA 1455/26. F.F., K.S., and A.B. are grateful for support from STScI Grant HST-GO-13703.002-A. T.S. acknowledges support from the European Research Council (ERC) under the European Union's DLV-772225-MULTIPLES Horizon 2020 research and innovation programme.

1 Alkanes -- 1.1. Introduction -- 1.2. CH3 stretching frequencies -- 1.3. CH2 stretching frequencies -- 1.4. The symmetric methyl deformation frequency -- 1.5. The CH2 deformation frequency -- 1.6. Skeletal vibrations -- 2 Alkenes and Vibrations of C=N and N=N Links -- 2.1. The C=C stretching frequency -- 2.2. C=C Frequencies in open chains -- 2.3. CH stretching vibrations of olefines -- 2.4. The C=N stretching frequency -- 2.5. The N=N stretching frequency -- 3 X=Y=Z Systems and Triple Bonds -- 3.1. Introduction, multiple bond systems -- 3.2. Isothiocyanates -- 3.3. Thiocyanates -- 3.4. Isocyanates -- 3.5. Azides -- 3.6. Carbodi-imides -- 3.7. Diazo compounds -- 3.8. Alienes -- 3.9. Factors controlling the stretching frequencies of triple bonds -- 3.10. Isonitriles -- 3.11. Alkynes -- 4 Unassociated XH Vibrations -- 4.1. Introduction -- 4.2. Changes in XH stretching frequencies following alterations in the X Element -- 4.3. Changes in XH stretching frequencies with alterations in the Substituents at X -- 4.4. vOH stretching frequencies -- 4.5. vNH stretching frequencies -- 4.6. Silicon and germanium hydrides -- 4.7. Hydrides of other elements -- 5 Carbonyl Frequencies -- 5.1. Introduction -- 5.2. Mass effects -- 5.3. Frequency interaction effects -- 5.4. The effects of changes in bond angles, and in the strengths of the adjacent bonds -- 5.5. Chemical effects -- 5.6. Field effects in carbonyl compounds -- 5.7. The effects of changes of phase or of Association -- 5.8. Carbonyl frequencies in specific classes of compound -- 5.9. The carbonyl deformation frequency -- 6 X=Y Bonds Other than Carbonyl. vS=O, N=O, P=O, P=S, C=S and C=Se Vibrations -- 6.1. The sulphoxide group -- 6.2. The XN=O bond -- 6.3. The P=O stretching frequency -- 6.4. The P=S vibration -- 6.5. The P=Se vibration -- 6.6. The C=S vibration -- 6.7. The C=Se vibration -- 7 Stretching Vibrations of XO2 Systems, RSO2, RNO2, RCO2 -- 7.1. The SO2 stretching vibrations -- 7.2. The X-NO2 stretching vibrations -- 7.3. The ionized carboxyl group CO2- -- 8 Associated XH Frequencies, The Hydrogen Bond -- 8.1. Introduction -- 8.2. OH…X systems -- 8.3. NH…X hydrogen bonds -- 8.4. Hydrogen bonding in thiols -- 8.5. CH…X hydrogen bonds -- 8.6. Hydrogen bonds of inorganic acids.

Among the different types of massive stars in advanced evolutionary stages is the enigmatic WN8h type. There are only a few Wolf–Rayet (WR) stars with this spectral type in our Galaxy. It has long been suggested that WN8h-type stars are the products of binary evolution that may harbor neutron stars (NS). One of the most intriguing WN8h stars is the runaway WR 124 surrounded by its magnificent nebula M1-67. We test the presence of an accreting NS companion in WR 124 using ~100 ks long observations by the Chandra X-ray observatory. The hard X-ray emission from WR 124 with a luminosity of L X ~ 1031 erg s−1 is marginally detected. We use the non-local thermodynamic equilibrium stellar atmosphere code PoWR to estimate the WR wind opacity to the X-rays. The wind of a WN8-type star is effectively opaque for X-rays, hence the low X-ray luminosity of WR 124 does not rule out the presence of an embedded compact object. We suggest that, in general, high-opacity WR winds could prevent X-ray detections of embedded NS, and be an explanation for the apparent lack of WR+NS systems. ; Support for this Letter was provided by the National Aeronautics and Space Administration through Chandra award No. G07-18014X issued by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the NASA contract NAS8-03060. J.A.T., M.A.G., and H.T. are funded by UNAM DGAPA PAPIIT project IA100318. L.M.O. acknowledges support by the DLR grant 50 OR 1508 and partial support by the Russian Government Program of Competitive Growth of Kazan Federal University. A.A.C.S. is supported by the Deutsche Forschungsgemeinschaft (DFG) under grant HA 1455/26 and would like to thank STFC for funding under grant No. ST/R000565/1. Y.-H.C. acknowledges support from the Ministry of Science and Technology of Taiwan. T.S. acknowledges support from the German Verbundforschung (DLR) grant 50 OR 1612. J.M.T. acknowledges support from ESP2017-85691-P.

Includes index. ; "September 1964." ; Shipping list no.: 90-805-P. ; "Reprint which includes current pages from changes 1 through 5." ; "Supersedes TB 9-2520-204-30/1, 20 March 1958, TB 9-2520-204-30/2, 21 March 1958, TB 9-2570-204-30/1, 28 March 1958, TB 9-837-2, 20 November 1952, TB 9-837-11, 14 October 1955, MWO 9-2320-211-30/3, 26 September 1958, TM 9-1837B, 19 September 1952 (including all changes), TM 9-8029-3, 17 February 1954, TB 9-1837B-2, 13 December 1957 and so much of TB 9-2855-19, 3 March 1954, TB 9-2855-18, 30 June 1954 and TB 9-2855-42, 26 November 1956 as pertains to field maintenance instructions"--P. i. ; Cover title. ; Includes bibliographical references (p. 561). ; Mode of access: Internet. ; 14

[ES] In a specific section of the Crónica de Alfonso X, there is a rapprochement to the political thinking of the Spanish nobility of the thirteenth century, as reflected in the events of 1272-1273. It is suggested that: (a) the real undeclared motive of the uprising could be the nobilary — mainly the Large — opposition to the imperial ambitions of Alfonso X; (b) the in-depth study of nobility claims reveals not only specific ambitions and interests, but also the existence of conceptions about the kingdom, society and the role of nobility in it, which conflict with initiatives articulated since the monarchy in the previous decades. ; Peer reviewed ; [ES] In a specific section of the Crónica de Alfonso X, there is a rapprochement to the political thinking of the Spanish nobility of the thirteenth century, as reflected in the events of 1272-1273. It is suggested that: (a) the real undeclared motive of the uprising could be the nobilary — mainly the Large — opposition to the imperial ambitions of Alfonso X; (b) the in-depth study of nobility claims reveals not only specific ambitions and interests, but also the existence of conceptions about the kingdom, society and the role of nobility in it, which conflict with initiatives articulated since the monarchy in the previous decades. ; [FR] À travers l'analyse du passage de la Chronique d'Alphonse X consacré aux événements des années 1272-1273, l'on tente une approche de la pensée politique de la noblesse castillane du XIIIe siècle telle que ces événements la reflètent. L'on suggère: a) que le véritable mobile, non déclaré, de la révolte a pu être l'opposition nobiliaire -principalement des Lara- aux ambitions impériales d'Alphonse X; b) que l'étude approfondie des revendications nobiliaires ne révèle pas seulement des ambitions et des intérêts particuliers, mais encore l'existence d'idées sur le royaume, la société et le rôle de la noblesse dans celle-ci qui se heurtent aux initiatives monarchiques des décennies antérieures. ; [ES] In a specific section of the Crónica ...