Alf H. Øien

Position:	Professor.
Address:	Department of Mathematics, University of Bergen J. Bruns gt 12, N-5007 Bergen, Norway.
Phone:	(+47) 55 58 28 53 or 55 58 48 75
Fax:	(+47) 55 58 96 72 or 55 58 48 85
Email:	alfen@mi.uib.no

Research interests:

Plasma Dynamics

Modelling in physiology

Modelling in zoology

Plasma dynamics.
- Kinetic theory.
- Transport theory.
- Neutral and Non-neutral plasmas.
Applied to laboratory-, solar-, and ionospheric plasmas.

Selected papers since 1979:

Øien, A.H. (1979). Kinetic equation for an electron gas (non-neutral plasma) in strong fields and inhomogeneities, J. Plasma Physics, 21, p401.

Øien, A.H. (1986). A Kinetic Study of Collisional Transfer Properties for a Plasma in an Oscillating Electric field, Physica Scripta, 33, p254.

Øien, A.H. (1990). Effects of repeated interactions and correlational disintegration on kinetic and transport properties of a non-neutral plasma in strong fields, J. Plasma Physics, 44, p167.

Øien, A.H. and Alendal, G. (1993). A Model of Solar Coronal Heating by Classical Inverse Bremsstrahlung and Generation of the Solar Wind, APJ, 412, p827.

Øien, A.H. (1995). Anomalous temperature relaxation and particle transport in a strongly non-uniform, fully ionized plasma in a strong magnetic field, J. Plasma Physics, 53, p31.

Øien, A.H. (1999). Transition from collision-dominated to collisionless regions in a plasma: a global distribution function for outflowing light ions in polar regions of the ionosphere - an analytic approach, J. Plasma Physics, 61, p735.

Øien, A.H. (2001). Trapping of dilute ion components in wells and double wells in higher equatorial magnetic regions: A kinetic theory including collisions, varying background and additional fields. Report no. 157, Department of Applied Mathematics, University of Bergen, Norway, August 2001. (see Abstract, wells)

Øien, A.H. (2003). A kinetic and macroscopic description of dust in a plasma, including collisions, charging and charge spread effects on diffusion and waves, J. Plasma Physics, 69, p159.
Modelling in physiology.
- Autoregulation of renal blood flow.
- Myogenic- and tubuloglomerular mechanisms.
Selected papers:

Øien, A.H. and Aukland, K. (1983). A Mathematical Analysis of the Myogenic Hypothesis with Special Reference to Autoregulation of Renal Blood Flow, Circ Res, 52, p241.

Kirkebø, A., Øien, A.H. and Aukland, K. (1983). Capillary transport of H2 gas generated locally in renal tissue, Acta Physiol Scand, 177, p99.

Aukland, K. and Øien, A.H. (1987). Renal autoregulation: models combining tubuloglomerular feedback and myogenic response, Am J Physiol , 254, p768.

Øien, A.H. and Aukland, K. (1991). A multinephron model of renal blood flow autoregulation by tubuloglomerular feedback and myogenic response, Acta Physiol Scand, 143, p71.

Clausen, G.; Øien, A. H.; Aukland, K. (1992). Renal myogenic vasoconstriction induced by reducing perirenal pressure. Acta Physiol Scand. 144, s. 277-290 1992. Renal myogenic vasoconstriction induced by reducing perirenal pressure. Acta Physiol Scand. 144, s. 277-290.

Tenstad, O.; Williamson, H.E.; Clausen, G.; Øien, A.H.; Aukland, K.(1994).
Glomerular filtration and tubular absorption of the basic polypeptide
aprotinin. Acta Physiol Scand. 152: 33-50. ISSN 0001-6772

Modelling in zoology.
Øien, A.H. (2001). A description of daphnicle dynamics based on kinetic theory: Attempts at analogue-modelling of swarming and behaviour of Daphnia. Report no. 156, Department of Applied Mathematics, University of Bergen, Norway, June 2001. (see Abstract, Daph)
Øien, A.H. (2004) Daphnicle dynamics based on kinetic theory: an analogue-modelling of swarming and behaviour of daphnia,, Bulletin of Mathematical Biology,Volume 66, Issue 1, Pages 1-46

Last update March 26, 2004.