Physical Sciences and Mathematics Commons^™

Structure And Development Of Pitch Canker Infected Monterey Pine Stands At Año Nuevo, California, Douglas D. Piirto, Sauli Valkonen

Natural Resources Management and Environmental Sciences

The sustainability of indigenous Monterey pine (Pinus radiata D. Don)at Ano Nuevo stands in the central coast of California was examined. The foremost management objective in these stands is to establish and maintain stand structures that ensure a sustainable presence of the species in terms of uneven-aged management. The major threats are the proliferation of shade-tolerant tree species and the pitch canker ( Fusarium circinatum) disease. The study was based on data from 17 systematically placed sample plots, measured once, in one stand with a very high degree of variation in stand structure and species composition. The results …

On The Growth Problem For Skew And Symmetric Conference Matrices, C. Kravvaritis, M. Mitrouli, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

C. Koukouvinos, M. Mitrouli and Jennifer Seberry, in "Growth in Gaussian elimination for weighing matrices, W (n, n — 1)", Linear Algebra and its Appl., 306 (2000), 189-202, conjectured that the growth factor for Gaussian elimination of any completely pivoted weighing matrix of order n and weight n— 1 is n— 1 and that the first and last few pivots are (1,2,2,3 or 4, ..., n–1 or (n–1)/2, , (n–1)/2, n–1) for n > 14. In the present paper we study the growth problem for skew and symmetric conference matrices. An algorithm for extending a k × k matrix with elements …

Slides: City Of Arcata Community Forest, Mark André

Community-Owned Forests: Possibilities, Experiences, and Lessons Learned (June 16-19)

Presenter: Mark André, Arcata, CA, Community Forest

42 slides

Agenda: Hard Times On The Colorado River: Drought, Growth And The Future Of The Compact, University Of Colorado Boulder. Natural Resources Law Center, Western Water Assessment (Program), Colorado Water Conservation Board, Center For Advanced Decision Support For Water And Environmental Systems, Hydrosphere Resource Consultants, Rocky Mountain Mineral Law Foundation, Colorado Foundation For Water Education, Patrick, Miller & Kropf, P.C., William & Flora Hewlett Foundation

Hard Times on the Colorado River: Drought, Growth and the Future of the Compact (Summer Conference, June 8-10)

Sponsors and Contributors: Colorado Water Conservation Board, Center for Advanced Decision Support for Water and Environmental Systems, Western Water Assessment, CU-CIRES/NOAA, Hydrosphere Resource Consultants, Rocky Mountain Mineral Law Foundation, Colorado Foundation for Water Education, Patrick, Miller & Kropf, P.C., William and Flora Hewlett Foundation.

The Colorado River is approaching a crossroads. For the first time in its history, satisfying water demands in one state may require curtailing legally-recognized uses in another. This is not the first instance of water shortages in the region, and conflict among the seven Colorado River states is certainly not new. But the potential shortages on …

A Preliminary Study Of Electrocrystallization Of Bismuth On Glassy Carbon, Min-Li Yang, Zhan-Jun Zhang

Journal of Electrochemistry

The electrocrystallization of bismuth on glassy carbon electrodes (GCEs) from nitrate solutions was studied by cyclic voltammetry and chronoamperometry. Cyclic voltammograms exhibit a crossover between the cathodic and anodic branches, characteristic of the formation of bismuth nuclei on GCEs, and show that the bismuth electrocrystallization on GCEs is a diffusion-controlled reaction. The current transients were analyzed with the Scharifker and the Heerman equations. With the increaseof Bi~(3+)concentration, the non-dimensional plots leaned to the theoretical curve for 3D instantaneous nucleation and growth. The overpotential dependence of nucleation and growth mechanism was also found. With the increase of overpotential, the non-dimensional curve …

Alternative Futures For The Bear River Watershed, Bioregional Planning Program, Department Of Environmental Society, College Of Natural Resources, Utah State University, R. E. Toth, J. B. Baker, C. L. Bryner, J. Evans, K. E. Hinman, K. R. Kilpatrick, K. Seegmiller

All U.S. Government Documents (Utah Regional Depository)

No abstract provided.

Humic And Fulvic Acids: Effects On Plant Nutrition And Growth, Jason Tew

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Humic substances are reported to improve plant growth and nutrient uptake, with iron the most studied nutrient. The most common forms of iron in soils are iron oxides, which are stable under aerobic conditions and unavailable for plant uptake. Iron deficient plants become chlorotic, which reduces growth and yield. To determine if humic substances can reduce iron chlorosis, five commercially available organic acids were tested on maize grown in sand columns at high pH. The dry granular humic acid from Aldrich Chemical Company applied at 84.4 g/liter of sand by volume (5% by mass) and 1 g/liter added with irrigation …

Values Of Minors Of Some Infinite Families Of Matrices Constructed From Supplementary Difference Sets And Their Application To The Growth Problem, C. Koukouvinos, M. Mitrouli, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

We obtain explicit formulae for the values of the 2v - j minors, j = 0,1, 2 of (1, -1) matrices of order 2v, v odd, where the matrix is constructed using two circulant or type 1 incidence matrices of 2— {v; k1, k2, λ} sds. This allows us to obtain information on the growth problem for families of matrices with moderate growth. Some of our theoretical formulae imply growth close to the order 2v but experimentation has not yet supported this result. An open problem remains to establish whether the (1, -1) CP incidence matrices of certain SBIBDs, can …

The Magnetic Behaviour Of The Surface And Bulk Components Of Tb(0001)Films, Orhan Zeybek

Turkish Journal of Physics

The use of circularly polarised light in photoemission from ferromagnetically ordered rare earth's (RE) shows large magnetic circular dichroism in angular dependence (MCDAD) effect. Therefore MCDAD in photoemission from RE's provides new perspectives for surface magnetism studies within the view of the recently postulated sum rules. This allows to probe magnitude and orientation of the sample magnetisation without time-consuming electron-spin analysis. The well-resolved multiplet structures have been obtained in 5p photoemission of Tb using circularly polarised light. This multiplet structure is caused by the interaction between the core level photohole and those partially filled subshell, i.e. as result of the …