Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 76771 - 76800 of 78553

Full-Text Articles in Entire DC Network

The Role Of W.H.O. In The Study And Control Of Rodent-Borne Disease, N.G. Gratz Mar 1974

The Role Of W.H.O. In The Study And Control Of Rodent-Borne Disease, N.G. Gratz

Vertebrate Pest Conference Proceedings: 6th (1974)

While little information is available on the distribution and incidence of most of the diseases with rodent reservoirs, many of them are known to be widespread and may have considerable public health importance in some of the foci in which they are found. The World Health Organization is carrying out investigations on the epidemiology of several diseases with rodent reservoirs and on the biology and ecology of the rodent reservoir species themselves. These investigations are being carried out both at WHO research u n i t s and with collaborating laboratories. Based on the ecological information the organization is attempting …


The Role Of F.A.O. In Vertebrate Pest Problems, H.R. Shuyler Mar 1974

The Role Of F.A.O. In Vertebrate Pest Problems, H.R. Shuyler

Vertebrate Pest Conference Proceedings: 6th (1974)

Since 1947, when FAO began its involvement in vertebrate pest problems, its role has gradually expanded. Through short-term Consultants, Experts, Regional and Headquarters Officers, it advises Member Countries about vertebrate pest control needs and opportunities, fulfills requests for assistance suggesting needed modifications, and guides and reports on assistance rendered. Assistance may involve one or more international specialists for a few weeks up to national and regional projects of several years' duration. In cooperation with WHO it sponsors meetings of specialists, develops rodenticide specifications for international commerce, and has published rodent bibliographies covering 1950 to 1969.


Seasonal Changes In Water Quality And Primary Productivity In Doe Valley Lake, Edmond J. Bacon, Stuart E. Neff Mar 1974

Seasonal Changes In Water Quality And Primary Productivity In Doe Valley Lake, Edmond J. Bacon, Stuart E. Neff

KWRRI Research Reports

Primary productivity and water quality were studied in Doe Valley Lake, a 147-hectare impoundment on Doe Run, a spring-fed stream in Meade County, Kentucky, from 13 June 1969 to 31 July 1972. Doe Valley Lake is monomictic during most winter seasons, but it is dimictic during more severe winters because of its morphometry and location on the borderline climatic region for dimictic lakes (37° N latitude). Oxygen depletion in the hypolimnion is severe, and anaerobic conditions usually prevail by late June. A hypolimnetic areal deficit of 0.038 mg/cm2/day was calculated. Supersaturation of oxygen in the epilimnion was common, …


Water Current, Volume 6, No. 3, March 1974 Mar 1974

Water Current, Volume 6, No. 3, March 1974

Water Current Newsletter

From the Desk of the Director
Water Resources Seminar Series
1974 Summer Institute
Administration Water Budget - FY 1975
Bureau of Reclamation
Office of Water Resources Research
Office of Saline Water
Water Resources Council
Commisson on Water Quality
US Geological Survey
Stream Channelization Critiicized
Investments in Transportation
Cloud Seeding Impacts Researched
$7 Billion Proposed for Environmental Programs
WRC Issues New Guidelines
Research Review: Biological Control of Blue-Green Algae


An Ok Science Teacher, Robert Fuller Mar 1974

An Ok Science Teacher, Robert Fuller

Robert G. Fuller Publications

Many elementary school teachers feel insecure and unsure in their teaching of science, i.e., they have NOT OK feelings about themselves and science. These feelings are based on the teachers' previous science experiences and on their interactions with other persons in science courses. The improvement of elementary school science programs depends upon the teacher's ability to deal effectively with his feelings about science. A complete science education program for an elementary teacher includes three components: (1) science content, (2) science methods that take into consideration the intellectual development of children, and (3) a practical psychology for developing positive human attitudes …


The Prairie Naturalist Volume 6, No.1. March 1974 Mar 1974

The Prairie Naturalist Volume 6, No.1. March 1974

The Prairie Naturalist

AVIAN MORTALITY FROM COLLISIONS WITH OVERHEAD WIRES IN NORTH DAKOTA ▪ G. L. Krapu

NOTES ON THE BIOLOGY OF THE OLIVE-BACKED POCKET MOUSE PEROGNATHUS FASCIATUS ON THE NORTHERN GREAT PLAINS ▪ J. E. Pefaur & R. S. Hoffman

NOTE: Swans Resting on the Surface of A Dry Lake ▪ D. S. Gilmer


Terminal Talk - The Wofford Connection - February 1974, Wofford College Computer Center Feb 1974

Terminal Talk - The Wofford Connection - February 1974, Wofford College Computer Center

Terminal Talk

No abstract provided.


Development Of Prediction Relationships For Water Requirements With Irrigation Cooling, Billy J. Barfield, John N. Walker, F. A. Payne Feb 1974

Development Of Prediction Relationships For Water Requirements With Irrigation Cooling, Billy J. Barfield, John N. Walker, F. A. Payne

KWRRI Research Reports

A model for predicting leaf temperatures during an off-on mist cycle is presented. The model uses a combination of energy budget and aerodynamic techniques. The model was tested for dry leaf temperature and evapotranspiration predictions using average hourly data from Arizona. The accuracy was good. It was also tested for dry leaf temperature predictions using two to three minute data with a widely varying net radiation. When reasonable values of stomatal resistance were used, the agreement was again good.

The model was tested for prediction of wet leaf temperature prediction with a ten minute on, fifty minute off mist irrigation …


Water Resources News, Volume 6, No. 2, February 1974 Feb 1974

Water Resources News, Volume 6, No. 2, February 1974

Water Current Newsletter

From the Desk of the Director
1974 Summer Institute
NWRRI Research Seminar
Water Resources Seminar Series
Future Water Use - Coal vs. Irrigation
Yellowstone River Basin Study Proposed
EPA Increases Tuition Fees
Changing Attitudes in the Corps
Social Effects of Public Works Projects
Water Programs Reorganized, Replaced and Removed
WRC's 6-7/8% Rate May Be Reduced
Cost Sharing Receives a Back Seat
Research Review: Digital Simulation of Conjunctive-Use Irrigation in Dawson County, Nebraska


Effect Of Virtual 4d-Shell Excitations On Rare Earth Spectra, Anthony F. Starace Jan 1974

Effect Of Virtual 4d-Shell Excitations On Rare Earth Spectra, Anthony F. Starace

Anthony F. Starace Publications

Ab initio energies for electric dipole transitions 4d10 (1S0) → 4d94f J = 1 in triply-ionized lanthanum have been calculated by constructing an effective interaction, acting within the configuration 4d94f, that incorporates effects of virtual 4d-shell excitations to all orders of perturbation. Virtual 4d-shell excitations, included within the random phase approximation, and virtual excitations to singly-excited configurations 4d9εf are found to reduce the ordinary electrostatic interaction by 38% for the 1P1 term of 4d94f, by 6% for the 3D1 term, and by 3% …


Habitat Management Series For Unique Or Endagered Species: Burrowing Owl, Mark Zarn Jan 1974

Habitat Management Series For Unique Or Endagered Species: Burrowing Owl, Mark Zarn

United States Bureau of Land Management: Staff Publications

The objective of this report is to provide BIM personnel with the latest and most up-to-date information on rare or endangered species occurring on the public domain. This will provide a tool for improved understanding of the interrelationships between the species and its environment and encourage an end product of enlightened land management which will fully consider the species welfare in all management decisions.


Prostaglandins From Plexaura Homomalla: Ecology, Utilization And Conservation Of A Major Medical Marine Resource. A Symposium, Frederick M. Bayer, Alfred J. Weinheimer Jan 1974

Prostaglandins From Plexaura Homomalla: Ecology, Utilization And Conservation Of A Major Medical Marine Resource. A Symposium, Frederick M. Bayer, Alfred J. Weinheimer

Studies in Tropical Oceanography

No abstract provided.


Data Processing, Storage And Retrieval, C. Romesburg Jan 1974

Data Processing, Storage And Retrieval, C. Romesburg

Modeling

No abstract provided.


Life: A Computer Program For Stochastic Life Table Analysis, C. Romesburg, K. Marshall Jan 1974

Life: A Computer Program For Stochastic Life Table Analysis, C. Romesburg, K. Marshall

Memorandum

No abstract provided.


Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, Duncan T. Patten, Edward M. Smith Jan 1974

Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, Duncan T. Patten, Edward M. Smith

Memorandum

No abstract provided.


The Consumption, Utilization And Modification Of Nutritional Resources By The Jackrabbit (Lepus Californicus) In The Mohave Desert, V. H. Shoemaker, K. A. Nagy, W. R. Costa Jan 1974

The Consumption, Utilization And Modification Of Nutritional Resources By The Jackrabbit (Lepus Californicus) In The Mohave Desert, V. H. Shoemaker, K. A. Nagy, W. R. Costa

Memorandum

No abstract provided.


Gas Exchange, Translocation, Root Growth, And Soil Respiration Of Great Basin Plants, M. M. Caldwell, E. J. Depuit, O. A. Fernandez, H. H. Wiebe, L. B. Camp Jan 1974

Gas Exchange, Translocation, Root Growth, And Soil Respiration Of Great Basin Plants, M. M. Caldwell, E. J. Depuit, O. A. Fernandez, H. H. Wiebe, L. B. Camp

Memorandum

No abstract provided.


Organic Constituents In Soils, R. L. Westerman Jan 1974

Organic Constituents In Soils, R. L. Westerman

Memorandum

No abstract provided.


Reproduction And Survivorship Of The Lizard, Uta Stansburiana, And The Effects Of Winter Rainfall, Density And Predation On These Processes, Frederick B. Turner, Philip A. Medica, Donald D. Smith Jan 1974

Reproduction And Survivorship Of The Lizard, Uta Stansburiana, And The Effects Of Winter Rainfall, Density And Predation On These Processes, Frederick B. Turner, Philip A. Medica, Donald D. Smith

Memorandum

No abstract provided.


Phenology, Productivity And Nutrient Dynamics Of Some Cool Desert Desert Shrubs, Neil E. West, Carol Gunn Jan 1974

Phenology, Productivity And Nutrient Dynamics Of Some Cool Desert Desert Shrubs, Neil E. West, Carol Gunn

Memorandum

No abstract provided.


Distribution And Balance Of Biomass And Nutrients In Desert Shrub Ecosystems, James O. Klemmedson Jan 1974

Distribution And Balance Of Biomass And Nutrients In Desert Shrub Ecosystems, James O. Klemmedson

Memorandum

No abstract provided.


A Generalized Phenology Submodel For Desert Plants, J. Reynolds Jan 1974

A Generalized Phenology Submodel For Desert Plants, J. Reynolds

Memorandum

No abstract provided.


Distribution Of Soil Arthropods In Rock Valley, Nevada, Eric B. Edney, James F. Mcbrayer, Paul J. Franco, Allen W. Phillips Jan 1974

Distribution Of Soil Arthropods In Rock Valley, Nevada, Eric B. Edney, James F. Mcbrayer, Paul J. Franco, Allen W. Phillips

Memorandum

No abstract provided.


An Approach For A Photosynthesis Model Of Desert Plants, E. D. Schultze, O. L. Lange, A. Olsen Jan 1974

An Approach For A Photosynthesis Model Of Desert Plants, E. D. Schultze, O. L. Lange, A. Olsen

Memorandum

No abstract provided.


Meteorological Input To General-Purpose Models: A New Subroutine, David W. Goodall, Janice Robinson Jan 1974

Meteorological Input To General-Purpose Models: A New Subroutine, David W. Goodall, Janice Robinson

Memorandum

No abstract provided.


Simulations Of Desert Biome Sites Using The General-Purpose Model, C. Gist, David W. Goodall Jan 1974

Simulations Of Desert Biome Sites Using The General-Purpose Model, C. Gist, David W. Goodall

Memorandum

No abstract provided.


Demographic And Individual Growth Studies For Dipodomys Ordii, Peromyscus Maniculatus And Reithrodnotomys Megalotis, H. Duane Smith, Clive D. Jorgensen, Gary H. Richins, Nils C. Stenseth Jan 1974

Demographic And Individual Growth Studies For Dipodomys Ordii, Peromyscus Maniculatus And Reithrodnotomys Megalotis, H. Duane Smith, Clive D. Jorgensen, Gary H. Richins, Nils C. Stenseth

Memorandum

No abstract provided.


A Decomposition Submodel, H. Parnas, J. Radford Jan 1974

A Decomposition Submodel, H. Parnas, J. Radford

Memorandum

No abstract provided.


Biochrome Analysis As A Method For Assessing Phytoplankton Dynamics Phase I, Richard L. Meyer Jan 1974

Biochrome Analysis As A Method For Assessing Phytoplankton Dynamics Phase I, Richard L. Meyer

Arkansas Water Resources Center Technical Reports

Selected chemical, physical and biological parameters were determined for a man-made lake, Beaver Lake, on the White River of Arkansas and Missouri. The research program determined the qualitative and quantitative aspects of the temporal and spatial distribution of the algal subcommunities. It was determined that the epipelic, epilithic, epizooic and metaphytic subcommunities had little influence on the euplanktonic subcommunity. The relationship between the qualitative and quantitative analysis of the biochromes chlorophyll-a, -b, and -c and the phytoplankton species clustered into biochrome sets is discussed. The temporal and spatial distributional patterns of temperature, oxygen, ammonia-N, nitrate-N, ortho phosphate-P and silicates are …


Seasonal Use Of Soil Moisture By Mature Velvet Mesquite (Prosopis Juliflora Var. Velutina), Dwight R. Cable Jan 1974

Seasonal Use Of Soil Moisture By Mature Velvet Mesquite (Prosopis Juliflora Var. Velutina), Dwight R. Cable

Memorandum

No abstract provided.