| 1. |
- Bååth, L.B. 1948-
(författare)
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Radiogalaxer och kvasarer
- 1990
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Ingår i: Astronomisk årsbok 1991. - Johanneshov : Inova. - 918599622X ; , s. 71-77
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Bokkapitel (refereegranskat)
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| 2. |
- Bååth, L.B. 1948-
(författare)
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VLBI observations at 100 GHz
- 1990
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Ingår i: Parsec-Scale radio jets. - Cambridge : Cambridge University Press. - 0521392268 ; , s. 91-97
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Bokkapitel (refereegranskat)abstract
- We present maps using VLBI at 100 GHz of three sources, 3C273, 3C345, and 3C84. The resolution is 50 μas, the highest yet achieved.
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| 3. |
- Landström, Hans
(författare)
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Co-operation between venture capital companies and small firms
- 1990
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Ingår i: Entrepreneurship and Regional Development. - Abingdon : Routledge. - 0898-5626 .- 1464-5114. ; 2:4, s. 345-362
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Tidskriftsartikel (refereegranskat)abstract
- What are the characteristics of good co-operation between an entrepreneur and a venture capitalist? In this study the aim is to describe and analyse the relations between small firms owned by venture capital companies and venture capital companies in Sweden. The venture capital companies could be classified in four configurations; operations-oriented, consultancy-oriented, structure-oriented and mentor-oriented companies. The configurations reflect two dimensions in the co-operation, namely the character of operational work and the intensity of interaction. The results show among other thing that those configurations which worked ‘actively’ with their portfolio firms appear to provide resources to a greater extent than the more ‘passive’ companies. Furthermore, ‘continuous’ interaction between the entrepreneur and the venture capitalist seems to be important for the result of the portfolio firm © 1990 Taylor & Francis Group, LLC.
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| 4. |
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| 5. |
- Tang, G., et al.
(författare)
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Recent Evolution of Jet Components in 3C345 at 3.6 cm
- 1990
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Ingår i: Parsec-Scale radio jets. - Cambridge : Cambridge University Press. - 0521392268 ; , s. 32-37
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Bokkapitel (refereegranskat)abstract
- A series of 3.6 cm VLBI maps of 3C345 (1980.79 to 1988.38) is presented. The evolution of the jet components in this quasar is briefly discussed. Recent behavior of component C5 is described and the presence of a new component, tentatively labeled C6, is suggested.
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| 6. |
- Zhang, F.J., et al.
(författare)
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The radio fine structure of the BL Lacertae object Mk 421
- 1990
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Ingår i: Astronomy and Astrophysics. - Les Ulis : EDP Sciences. - 0004-6361 .- 1432-0746. ; 236:1, s. 47-52
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Tidskriftsartikel (refereegranskat)abstract
- The BL Lac object Markarian 421 (Mk 421) has been mapped using VLBI arrays at a wavelength of 6 cm on four epochs from 1980.41 to 1983.43. It has a core-jet like structure with the jet pointing to the direction of NW with a stable position angle of about -45 deg. Almost all of the flux variation is accounted for by the change of the peak flux density of a compact component in the core. The results show that Mk 421 may exhibit apparent superluminal motion with apparent transverse speeds of components of (1.92 + or - 0.03)c (from 1981.25 to 1981.94) and (1.79 + or - 0.23)c (from 1981.94 to 1983.43) for C1; and (1.36 + or - 0.22)c for C2. The position angles of both the components C1 and C2 are nearly the same as the position angle of the jet, and there is no significant change of position angle as they move away from the core.
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