Index Catalog // ScholarsArchive@OSU

A general theory of flooding implementing the cuspoid catastrophe

Creator:: Lafi, Abd Y.
Abstract:: The flooding phenomenon can be defined as the maximum attainable flow condition beyond which the well defined countercurrent flow pattern can no longer exist. Thus the countercurrent flow limit (CCFL) or the flooding limit may be thought of as the flow condition at which the strong interaction between the two...
Resource Type:: Dissertation
Full Text:: . Ring le, L. R. Davis, A. C. Klein, and T. Plant for serving as my committee members. Amongst the

A role for maize ROP2 GTPase in the male gametophyte

Creator:: Carroll, Kirstin Arthur
Abstract:: ROP GTPases are crucial regulators of pollen tube growth. The Rop GTPase family in maize consists of nine known rop genes, ropl-rop9. A subset of these genes (rop2, rop8, and rop9) are expressed in pollen. The rop2 and rop9 genes are a highly conserved duplicate gene pair of ancient origin....
Resource Type:: Dissertation
Full Text:: like to thank each my committee members; C. Rivin, B. Taylor, O.Riera-Lizarazu, T. Lomax, and my

A study of El Niño/southern oscillation : numerical experiments and data analysis

Creator:: Ahn, Joong Bae
Abstract:: For the purpose of investigating the fundamental nature of the interannual oscillation observed in the tropical Pacific in conjunction with El Nino/Southern Oscillation (ENSO), the Comprehensive Ocean Atmosphere Data Set was analyzed. Based upon this analysis, an "intermediate" tropical atmosphere-ocean coupled model was developed. For reason of their particular importance...
Resource Type:: Dissertation
Full Text:: Drs. T. D. Brown, J. A. Coakley, L. Mahrt and C. A. Paulson for their careful reading and discussions

A study of laser generated Rayleigh and Lamb waves in graphite/epoxy composites

Creator:: Park, Heeyong
Abstract:: The application of laser generated ultrasonics was first demonstrated in the mid-seventies and has shown good potential when applied to isotropic materials. However, its use with composite materials is still in the early stages of development. This study explores the potential for application of laser generated Rayleigh and Lamb waves...
Resource Type:: Dissertation
Full Text:: committee members, T. C. Kennedy, M. N. L. Narasimhan, E. Wolff, and Graduate Committe Representative, R. H

A systematic and ecological study of Astragalus diaphanus (Fabaceae)

Creator:: Wright, Carolyn E.
Abstract:: Astragalus diaphanus is a rare plant endemic to the John Day River drainage of north-central Oregon. This species has several interesting features, including the dimorphism of its fruit and its geographical isolation from the two nearest taxonomically related species, which occur in Colorado. This study addressed the species' distribution and...
Resource Type:: Masters Thesis
Full Text:: Day River J. & T.J. Howell 1882 John Day River near its mouth T. Howell 1882 John Day River at

An ecological reconnaissance of the artemisia steppe on the east central Owyee uplands of Oregon

Creator:: Culver, Roger Norman
Abstract:: As the management of range lands is intensified or as improvement activity is increased, a critical need is seen to refine the understanding of the ecology of these lands. If soil surveys on range lands are to be meaningful and useful, the relationship between the fundamental ecological units and the...
Resource Type:: Masters Thesis
Full Text:: - - Dr. C. T. Youngberg, Dr. D. W. Hedrick, and Dr. W. W. Chilcote. The writer is grateful for support

Analysis and modeling of electrically long MESFETS and coupled schottky lines

Creator:: Mohammed, Ahmed Sarhan
Abstract:: The properties of linear active coupled lines consisting of electrically long GaAs MESFET structures are investigated for possible applications as traveling-wave broad-band amplifiers. In addition, the nonlinear coupled Schottky lines are studied for applications as voltage tunable circuit elements. The analysis of the general active asymmetric coupled transmission lines in...
Resource Type:: Dissertation

Characteristics of two noncarotenogenic light sensitive mutants of Scenedesmus obliquus strain D₃

Creator:: Harvey, Geoffrey W.
Abstract:: Two light sensitive mutants of the green alga Scenedesmus obliquus strain D₃ have been characterized. The photodynamic nature of their sensitivity has been established, the subchloroplast site of photodamage has been investigated, and their noncarotenogenic character has been verified. The two mutants possess several similarities, although mutant L. S. -41...
Resource Type:: Dissertation
Full Text:: . Becker, Dr. T. C. Moore, Dr. K. E. Van Ho lde, Dr. I. Isenberg and Dr. W. K. Ferrell for serving on my

Characterization of selected plant communities within the Tillamook Burn in northwestern Oregon

Creator:: Bailey, Arthur W.
Abstract:: A study was initiated in 1961 to characterize seral plant communities in a part of the Cedar Creek drainage in the Tillamook Burn. Stratification of vegetation into ecological units was a necessary first step in conifer-animal damage studies supported by the Oregon State Game Commission. Reconnaissance information was recorded in...
Resource Type:: Masters Thesis
Full Text:: members of my com mittee: Dr. D. W. Hedrick, Mr. L. W. Kuhn, and Dr. C. T. Youngberg. The writer is

Chemical control of hop downy mildew (Pseudoperonospora humuli) and tolerance by Phytophthora isolates to the systemic fungicide metalaxyl

Creator:: Hunger, Robert Marvin
Resource Type:: Dissertation
Full Text:: extended to Drs. T. C. Allen, R. V. Frakes, D. I. Mills, and A. J. Ferro for serving as members of my

ScholarsArchive@OSU

A general theory of flooding implementing the cuspoid catastrophe

A role for maize ROP2 GTPase in the male gametophyte

A study of El Niño/southern oscillation : numerical experiments and data analysis

A study of laser generated Rayleigh and Lamb waves in graphite/epoxy composites

A systematic and ecological study of Astragalus diaphanus (Fabaceae)

An ecological reconnaissance of the artemisia steppe on the east central Owyee uplands of Oregon

Analysis and modeling of electrically long MESFETS and coupled schottky lines

Characteristics of two noncarotenogenic light sensitive mutants of Scenedesmus obliquus strain D₃

Characterization of selected plant communities within the Tillamook Burn in northwestern Oregon

Chemical control of hop downy mildew (Pseudoperonospora humuli) and tolerance by Phytophthora isolates to the systemic fungicide metalaxyl

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