Open Access. Powered by Scholars. Published by Universities.®
![Digital Commons Network](http://assets.bepress.com/20200205/img/dcn/DCsunburst.png)
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Earth Sciences (8)
- Geology (7)
- Environmental Sciences (6)
- Hydrology (4)
- Mathematics (4)
-
- Chemistry (3)
- Environmental Chemistry (2)
- Agriculture (1)
- Arts and Humanities (1)
- Christianity (1)
- Education (1)
- Engineering (1)
- Environmental Monitoring (1)
- Geomorphology (1)
- Glaciology (1)
- Higher Education (1)
- Life Sciences (1)
- Materials Science and Engineering (1)
- Meteorology (1)
- Natural Resources and Conservation (1)
- Oceanography and Atmospheric Sciences and Meteorology (1)
- Oil, Gas, and Energy (1)
- Physics (1)
- Religion (1)
- Stratigraphy (1)
- Institution
- Keyword
-
- Drainage (2)
- Streamflow (2)
- Valleys (2)
- Acid rain (1)
- Agriculture (1)
-
- Blue Earth County (Minn.) (1)
- Blue Earth River (Minn.) (1)
- Cannon River (Minn.) (1)
- Developing Countries (1)
- Ditches (1)
- Drift (1)
- Ecology (1)
- Environmental conditions--Seasonal variations (1)
- Geology--Minnesota (1)
- Glaciology (1)
- Land cover (1)
- Modern science (1)
- Natural science (1)
- Non-Oil Producing Countries (1)
- Philosophy of science (1)
- Scientific activity (1)
- Seismology (1)
- Shields (Geology) (1)
- Surplus Oil Funds (1)
- Vernal pools (1)
- Water quality--Measurement (1)
- Water--Sampling (1)
- Weather (1)
- Winter (1)
Articles 1 - 23 of 23
Full-Text Articles in Physical Sciences and Mathematics
Scs 57: On The Duality Of Semilattices, Karl Heinrich Hofmann, Jimmie D. Lawson
Scs 57: On The Duality Of Semilattices, Karl Heinrich Hofmann, Jimmie D. Lawson
Seminar on Continuity in Semilattices
Source: University archive of the Technische Universität Darmstadt.
Scs 56: On A Question Of O. Wyler, Karl Heinrich Hofmann, Klaus Keimel
Scs 56: On A Question Of O. Wyler, Karl Heinrich Hofmann, Klaus Keimel
Seminar on Continuity in Semilattices
Source: University archive of the Technische Universität Darmstadt.
Bond Of Union In Physical Science, Russell W. Maatman
22nd Rocky Mountain Conference On Analytical Chemistry
22nd Rocky Mountain Conference On Analytical Chemistry
Rocky Mountain Conference on Magnetic Resonance
Abstracts and meeting program from the 22nd annual meeting of the Rocky Mountain Conference on Analytical Chemistry, co-sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy and the Rocky Mountain Chromatography Discussion Group. Held in Denver, Colorado, August 10-14, 1980.
Recycling Surplus Oil Funds And The Economies Of Some Non-Oil Producing Developing Countries, Patrick E. Archibong
Recycling Surplus Oil Funds And The Economies Of Some Non-Oil Producing Developing Countries, Patrick E. Archibong
Economic and Financial Review
The main objective of the paper is to examine, in general, the phenomenon of recycling against the background of enduring and fundamental disequilibria in the payments balances of the economies of non-oil producing developing countries. The technique used is, essentially, casual empiricism. In part I of the paper a brief attempt is made, using elementary micro-economic analysis, to illustrate conditions for the emergence of the surplus oil funds. Part 1 examines the mechanics and_ channels of recycling while Part 111 reflects on the attendant external debt burden of some non-oil producing developing countries. Part IV dwells on the limited effectiveness …
Scs 55: Mc Direct Limits, John R. Isbell
Scs 55: Mc Direct Limits, John R. Isbell
Seminar on Continuity in Semilattices
No abstract provided.
Scs 54: Cl-Projective Limits Of Distributive Continuous Lattices Are Distributive, Karl Heinrich Hofmann
Scs 54: Cl-Projective Limits Of Distributive Continuous Lattices Are Distributive, Karl Heinrich Hofmann
Seminar on Continuity in Semilattices
No abstract provided.
Forest, Animal, And Seasonal Cycles Observed In Vernal Ponds At Audubon Center, Michael Link
Forest, Animal, And Seasonal Cycles Observed In Vernal Ponds At Audubon Center, Michael Link
Journal of the Minnesota Academy of Science
Observations of environmental conditions and biota in four depressed spots, called "vernal ponds", within the Northwoods Audubon Center near Sandstone, Minnesota, are reported for the period March 15 to September 4, 1977. Life cycle dynamics and utilization of the pond areas are considered in relation to time, days of the month, moisture-dryness, and species; but are lumped together for reporting as if the four locations were a single pond entity. Hypotheses as to the role of these ponds in the surrounding ecosystem and questions for possible further investigation are suggested.
Glacial Drift Stratigraphy: New London-Spicer Area, Minnesota, D. B. Anderson, L. G. Soroka
Glacial Drift Stratigraphy: New London-Spicer Area, Minnesota, D. B. Anderson, L. G. Soroka
Journal of the Minnesota Academy of Science
No abstract provided.
Acid Rains: Implications For Agriculture, Prabhu D. Rawate
Acid Rains: Implications For Agriculture, Prabhu D. Rawate
Journal of the Minnesota Academy of Science
No abstract provided.
A Technique For Collecting Water Samples Under Extreme Winter Conditions, J. B. Carlson, G. E. Ahlgren
A Technique For Collecting Water Samples Under Extreme Winter Conditions, J. B. Carlson, G. E. Ahlgren
Journal of the Minnesota Academy of Science
No abstract provided.
A Comparative Water Quality Study Of Man-Made Drainage And Natural Streams, Kent W. Boyum
A Comparative Water Quality Study Of Man-Made Drainage And Natural Streams, Kent W. Boyum
Journal of the Minnesota Academy of Science
The effects of man-made drainage systems on the water quality of receiving bodies Is relatively unknown. During the ice-free season of 1979, thirteen drainage ditches and f our rivers were sampled at intervals of three to eight days. With increasing flow, total orthophosphatephosphorous, total Kjeldahl-nitrogen, nitrate-nitrogen and total dissolved solids increased, but not proportionately to f low, with total orthophosphate-phosphorous showing the least proportionality. Variation was observed in each ditch and river when broken down seasonally for each parameter. Generally, when the percentage of flow was greater in one of the three seasons, the percentage of each of the other …
Land-Cover Changes In A River Valley In Blue Earth County, Minnesota, 1938-1974, Corrie Schaffer Cowley
Land-Cover Changes In A River Valley In Blue Earth County, Minnesota, 1938-1974, Corrie Schaffer Cowley
Journal of the Minnesota Academy of Science
The boundary of the Blue Earth River Valley was determined by stereoscopic viewing of 1938-39 aerial photographs. The same boundary was then drawn on corresponding 1974 photographs. All area within the river valley was assigned to one of four land-cover. Comparison of 1938-39 to 1974 shows a decrease of 19 percent in river area, an increase of one percent in row crop area, an increase of 52 percent in tree area, and a decrease of 45 percent in scrub area.
A Survey Of Water Flow In Drainage Ditches And Streams In South Central Minnesota, Clay Pierce, Bill Thompson
A Survey Of Water Flow In Drainage Ditches And Streams In South Central Minnesota, Clay Pierce, Bill Thompson
Journal of the Minnesota Academy of Science
Discharge was monitored on 13 agricultural drainage ditches and 4 small rivers in south central Minnesota. Derived data were categorized by response to hydrologic events and stream order. Stream order was found to be the most reliable predictor of hydrologic event response. Peak flows in drainage ditches were found to correspond to peak flows in rivers.
Seismic Survey Of Buried Bedrock Topography In The Cannon River Valley, Timothy D. Vick, Glenn Greilich, Geoffrey O. Seltzer
Seismic Survey Of Buried Bedrock Topography In The Cannon River Valley, Timothy D. Vick, Glenn Greilich, Geoffrey O. Seltzer
Journal of the Minnesota Academy of Science
A seismic survey of the Cannon River Valley between Northfield and Cannon Falls, Minnesota, revealed the presence of a 30-meter deep buried river valley under or near the Cannon River. The buried channel emanates from the Spring Creek Valley in Northfield, makes a 90-degree turn to the northeast at the confluence of Spring Creek and the Cannon River. and follows the Cannon to Cannon Falls. Buried tributary valleys appear to join the main buried channel at several locations. There may be buried tributary valleys or a network of abandoned Cannon River channels eroded into bedrock under the lake plain north …
Contamination Of Boone-St. Joe Limestone Groundwater By Septic Tanks And Chicken Houses, Gerald D. Cox, Albert E. Ogden, Gretta Slavik
Contamination Of Boone-St. Joe Limestone Groundwater By Septic Tanks And Chicken Houses, Gerald D. Cox, Albert E. Ogden, Gretta Slavik
Journal of the Arkansas Academy of Science
Eighty-one water samples were collected from wells in the Boone-St. Joe limestone aquifer of northwest Arkansas and analyzed for fecal coliform, fecal streptococcus, total coliform bacteria, chloride, phosphate, nitrate and sulfate to determine the degree of contamination. Forty-nine percent of the samples had fecal streptococcus counts greater than 1 colony per 100 ml, 68% had total coliform counts of 1 or more colonies per 100 ml, and 9% of the wells had fecal coliform counts of 1 or more colonies per 100 ml. Water from wells in Clarksville, Nixa, Noark, Tonti and Waben cherty silt loam soils showed from 83 …
Preliminary Investigation Of The Ground-Water Resources Of Northern Searcy County, Arkansas, Wyndal M. Goodman, Albert E. Ogden
Preliminary Investigation Of The Ground-Water Resources Of Northern Searcy County, Arkansas, Wyndal M. Goodman, Albert E. Ogden
Journal of the Arkansas Academy of Science
Two aquifers are extensively used by residents of small communities and rural areas in northern Searcy County, Arkansas. The Mississippian Boone-St. Joe aquifer is generally the less productive and the shallower of the two. Ground-water yields for the Boone-St. Joe range from 0.5 to 75 gpm with a median yield of 5 and a mean of 9.8 gpm. Well depths range from 100 to 754 feet with a median depth of 350 feet and a mean of 360 feet. Confined conditions are indicated by the greater depths, whereas the Boone-St. Joe aquifer is unconfined when exposed at the surface. Underlying …
Preliminary Investigation Of The Ground-Water Resources Of Baxter, Fulton, Izard And Sharp Counties, Arkansas, Mike Liebelt, Gerald Lundy, Albert E. Ogden
Preliminary Investigation Of The Ground-Water Resources Of Baxter, Fulton, Izard And Sharp Counties, Arkansas, Mike Liebelt, Gerald Lundy, Albert E. Ogden
Journal of the Arkansas Academy of Science
One hundred and seventy-seven drillers' well reports were used to investigate the groundwater resources of Baxter, Fulton, Izard, and Sharp counties. The most widely utilized aquifer zone is composed of the Cotter and Jefferson City dolomites. The well depths range from 30 to 740 ft. with a mean and median of 264 and 225 ft., respectively. The drillers' yield estimates range from 1 to 50 gpm with a mean of 12.0 gpm and a median of 10 gpm. The piezometric surface has an average hydraulic gradient of 9 ft./mile with groundwater discharge occurring along the Spring and White Rivers. Overlying …
Concentrations Of Total Dissolved Solids And Selected Cations In Dardanelle Lake, Arkansas, David M. Chittenden Ii
Concentrations Of Total Dissolved Solids And Selected Cations In Dardanelle Lake, Arkansas, David M. Chittenden Ii
Journal of the Arkansas Academy of Science
No abstract provided.
Factors Affecting The Sr-90 Concentration In Dardanelle Lake, Arkansas, David M. Chittenden Ii
Factors Affecting The Sr-90 Concentration In Dardanelle Lake, Arkansas, David M. Chittenden Ii
Journal of the Arkansas Academy of Science
No abstract provided.
Relation Of Magnetic And Gravity Field Data To Selected Structural Elements Of The Central Portion Of The Arkoma Basin, John H. Mcbride
Relation Of Magnetic And Gravity Field Data To Selected Structural Elements Of The Central Portion Of The Arkoma Basin, John H. Mcbride
Journal of the Arkansas Academy of Science
In order to acquire a greater understanding of some of the major basement structural features characteristic of the Arkoma basin, magnetic and gravity data have been collected and analyzed for a selected area. Several anomalies exist and are found to be associated with faulting or major fracturing in the Precambrian basement. Modelling of source bodies based on magnetic and gravity values provides quantitative estimates of the depth as well as the geometry of basement structural geology.
Stratigraphic Relationships Of The Brentwood And Woolsey Members, Bloyd Formation (Type Morrowan), Northwest Arkansas, Thomas A. Mcgilvery, Charles E. Berlau
Stratigraphic Relationships Of The Brentwood And Woolsey Members, Bloyd Formation (Type Morrowan), Northwest Arkansas, Thomas A. Mcgilvery, Charles E. Berlau
Journal of the Arkansas Academy of Science
The Brentwood Member of the Bloyd Formation conformably overlies the Prairie Grove Member, Hale Formation in the type Morrowan succession of northwestern Arkansas. At its type locality, the Brentwood is separated from the underlying Prairie Grove Member by nearly 6 m of dark shale. Away from this area, the shale thins rapidly and the Hale-Bloyd boundary may be placed with difficulty. At some localities east of type section, the boundary is thought to be erosional rather than the more typical gradational contact. The Brentwood consists of discrete carbonate bodies separated by dark shales. The carbonates consist principally of open shelf …
Mercury Content Of Waters In The Midcontinent Region, Larry Barber Ii, Kenneth F. Steele
Mercury Content Of Waters In The Midcontinent Region, Larry Barber Ii, Kenneth F. Steele
Journal of the Arkansas Academy of Science
Two major areas of the midcontinent region were investigated for their aqueous mercury concentrations. Sixteen surface water and 17 ground water samples were collected in an eleven county area of N.W. Arkansas, S.W. Missouri and N.E. Oklahoma (Ozark area) and analyzed for total dissolved mercury by the flameless atomic absorption spectrophotometric method. The range (<0.2 to 0.8 ppb), the mean (0.4 ppb) and the median (0.4 ppb) are the same for both ground water and surface water. Values obtained for the Ozark area are slightly greater than those reported for surface water by others (about 0.1 ppb), but are well within the range reported for surface waters (0.1 to 17.0 ppb). The range for 102 ground water samples from the Ouachita Mountain area is <0.1 to 2.3 ppb, the mean 0.3 ppb and the median 0.1 ppb. Thus, the mercury values for this area are similar to those of the Ozark area except fora higher upper range. The mercury mineralization (cinnabar) in the southern part of the Ouachita Mountain area, in part, is the cause of the higher values. Only two samples (2.1 and 2.3 ppb), both from the Ouachita Mountain area, exceed the EPA drinking water limits of 2 ppb mercury in the western Arkansas region.