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Articles 293581 - 293610 of 303961
Full-Text Articles in Physical Sciences and Mathematics
Feeding Behavior Of The Salamander Gyrinophilus Porphyriticus In Caves, David C. Culver
Feeding Behavior Of The Salamander Gyrinophilus Porphyriticus In Caves, David C. Culver
International Journal of Speleology
The feeding responses of salamander larvae (Gyrinophilus porphyriticus) from caves in the Powell Valley in Virginia were investigated in the laboratory. The larvae locate prey by mechanoreception and capture the prey by a rapid sucking action, much like cave-limited salamanders do. Feeding success is greater with the isopod Asellus recurvatus (about 90 per cent) than with the amphipod Crangonyx antennatus (about 50 per cent), and this largely accounts for the higher frequency of A. recurvatus taken in choice experiments. G. porphyriticus readily ingested the unfamiliar isopod Lirceus usdagalun, but it took four weeks before it was digested …
Trichoniscidae Della Grotta Di Su Mannau, Sardegna Sub-Occidentale (Crustacea, Isopoda), Roberto Argano
Trichoniscidae Della Grotta Di Su Mannau, Sardegna Sub-Occidentale (Crustacea, Isopoda), Roberto Argano
International Journal of Speleology
Description of three eyeless and apigmented new species of Trichoniscidae which have been found in Su Mannau cave in Sardinia. Two of them belong to the genus Catalauniscus Vandel: Catalauniscus hirundinella n.sp. offering few relationships with the spanish species C. espanoli Vandel, and Catalauniscus puddui n.sp. which has also similar features to an iberian form, C. bolivari Arcangeli. The third (Scotoniscus janas n.sp.) belongs to the endemic genus Scotoniscus Racovitza, until now monospecific and represented by a series of subspecies from the Northern Pyrenees, all nearly related to the specific form S. macromelos Racovitza. The discovery of those three …
Planning Programming Budgeting Study Of The City Of Winter Park, Alfred T. Sawicki
Planning Programming Budgeting Study Of The City Of Winter Park, Alfred T. Sawicki
Retrospective Theses and Dissertations
The report examines the applicability of Planning, Programming, and Budgeting System to the City of Winter Park. After briefly describing the character of the city, the goals are identified, the means by which they may be achieved and measure of evaluating progress toward them are given. To show how such an effort might be implemented, specific programs, objectives and effectiveness criteria are provided. These are followed by three examples in which the existing system is described and from which problems are revealed. Next, a brief analysis is performed to pinpoint the difficulty and a solution is proposed. The examples are …
Note On The Poisson Distribution, I. Adawi
Note On The Poisson Distribution, I. Adawi
Physics Faculty Research & Creative Works
No abstract provided.
Absolute Differential Elastic- And Inelastic-Scattering Cross Sections In 25-140 Kev He+ + He Collisions, Victor Pol, Walter Kauppila, John T. Park
Absolute Differential Elastic- And Inelastic-Scattering Cross Sections In 25-140 Kev He+ + He Collisions, Victor Pol, Walter Kauppila, John T. Park
Physics Faculty Research & Creative Works
Data obtained as energy-loss spectra at angles from 0 to 7.3x10-3 rad (c.m.) with typical energy-loss resolution of 0.7 eV and angular resolution of 2x10-3 rad (c.m.) were used to calculate average differential cross sections dσdΩav for elastic scattering, direct excitation of the individual He(n=2) states, and direct excitation of the He+(n=2) states. The total cross section for excitation of the He(n=2) states obtained by integrating the differential cross sections was found to be 20x10-18 cm2 at 25 keV (lab) decreasing to 7x10-18 cm2 at 140 keV. At incident lab energies below 100 keV the He(2S2) and He(2P3) states dominate …
Laser Scattering Measurements Of Droplet Growth In Binary Mixtures. Ii. H2o And Argon H2o And Helium, M. A. Viettit, Burton Schuster
Laser Scattering Measurements Of Droplet Growth In Binary Mixtures. Ii. H2o And Argon H2o And Helium, M. A. Viettit, Burton Schuster
Physics Faculty Research & Creative Works
Water droplet growth rates in a Wilson cloud chamber were measured in Ar-H2O and He-H2O media. These rates were determined in the size range 0.45-10.0 u.m by detection of oscillations in the intensity of polarized light from a He-Ne laser source scattered at 30° by the droplet population. Pressure and initial temperature were measured in the chamber for use in the computation of three droplet growth theories for comparison to experiment. Experiments were conducted in supersaturations ranging from 1.04 to 3.45.
Possible Applications Of Surface Electromagnetic Waves To Measure Absorption Coefficients, Ralph William Alexander, Robert John Bell, C. A. Ward, James Roger Weaver, I. L. Tyler, B. Fischer
Possible Applications Of Surface Electromagnetic Waves To Measure Absorption Coefficients, Ralph William Alexander, Robert John Bell, C. A. Ward, James Roger Weaver, I. L. Tyler, B. Fischer
Physics Faculty Research & Creative Works
We Show that Surface Electromagnetic Waves Can Probably Be Used to Measure the Absorption Coefficients of Materials overlaying Metals. the Proposed Experimental Method is Illustrated in the Infrared Frequency Range using Water, Teflon, and Polyethylene as Sample Materials.
Gaas Laser Experiments For The Undergraduate Laboratory, R. E. Robert, Daniel J. Jones, Kaare J. Nygaard
Gaas Laser Experiments For The Undergraduate Laboratory, R. E. Robert, Daniel J. Jones, Kaare J. Nygaard
Physics Faculty Research & Creative Works
No abstract provided.
Penning Ionization Of Zn And Cd By Noble-Gas Metastable Atoms, L. A. Riseberg, William F. Parks, Laird D. Schearer
Penning Ionization Of Zn And Cd By Noble-Gas Metastable Atoms, L. A. Riseberg, William F. Parks, Laird D. Schearer
Physics Faculty Research & Creative Works
The Penning-ionization cross sections for He, Ne, Ar, and Kr metastable atoms with Zn and Cd have been measured in a pulsed afterglow. Within the framework of existing theories we have determined those parameters which are of importance in collisions of this type. We find that our data are internally consistent if the cross sections are proportional to the cube of the "hard-sphere" radii and the effects of selection rules are included. A theoretical basis for this dependence is suggested. © 1973 The American Physical Society.
A Crystalline Fragment Of The Double Helix: The Structure Of The Dinucleoside Phosphate Guanylyl-3',5'-Cytidine, Roberta Ogilvie Day, Nadrian C. Seeman, John M. Rosenberg, Alexander Rich
A Crystalline Fragment Of The Double Helix: The Structure Of The Dinucleoside Phosphate Guanylyl-3',5'-Cytidine, Roberta Ogilvie Day, Nadrian C. Seeman, John M. Rosenberg, Alexander Rich
Chemistry Department: Faculty Publications
The sodium silt of guanylyl-3',5'-cytidine crystallizes in a monoclinic unit cell with one molecule in the asymmetric unit. Each molecule is related to another molecule by a 2-fold rotation axis which results in the formation of an antiparallel; right-handed .double helix with complementary hydrogen bonding between the guanine and cytosine residues. The crystal is heavily hydrated with 36 water molecules in the unit cell. The geometry of this crystalline double helix is. very similar to those which have been derived from studies of fiber x-ray diffraction patterns of double-stranded RNA; even though the latter do not yield data at atomic …
On The Effect Of Cesium In Photoionization Laser Plasmas, Kaare J. Nygaard
On The Effect Of Cesium In Photoionization Laser Plasmas, Kaare J. Nygaard
Physics Faculty Research & Creative Works
A number of photoionization mechanisms and how they can be used to generate large-volume laser plasmas are discussed. Reaction rates for two-step photoionization of the cesium atoms as well as formation of molecular ions (Cs2+) are estimated. The necessary cross-section data were obtained from related research in thermionic energy converters. © 1973, IEEE. All rights reserved.
1973 Lupin Cultivar Comparison, G Walton
1973 Lupin Cultivar Comparison, G Walton
Experimental Summaries - Plant Research
Comparison of lupin varieties - 73LG6, 73LG7, 73LG78, 73A15, 73BA6, 73C3, 73MT8, 73MT20, 73N3.
Pmr Spectra Of The 4-Alkylnitrobenzenes, Donald W. Beistel, Hsin-Liang Chen
Pmr Spectra Of The 4-Alkylnitrobenzenes, Donald W. Beistel, Hsin-Liang Chen
Chemistry Faculty Research & Creative Works
Evidence of first-order alkyl-ring proton coupling is reported for the 4-alkylnitrobenzenes. Typical coupling constants of 0.7 Hz and 0.3 Hz were found for α-alkyl coupling with the ortho and meta ring protons, respectively, when the alkyl function was methyl, ethyl, and isopropyl. No β-alkyl coupling with ring protons was observed for the ethyl, isopropyl, or t -butyl groups, suggesting that the magnitude of the coupling constant is vanishingly small.
Anclote Environmental Project Report 1973, Department Of Marine Science, University Of South Florida
Anclote Environmental Project Report 1973, Department Of Marine Science, University Of South Florida
Reports
This report is one in a continuing series on environmental quality in the Anclote estuary near Tarpon Springs, Florida. Much of the base line ecological data now collected will be outlined here and in subsequent works. Full scale power plant operations are scheduled to commence during the summer of 1974 after which time documentation of the nature and degree of environmental impact by the power plant will begin.
Compatibility And Stability Of 8% Amino Acids Solution In Combination With Electrolytes, Vitamins And Antibiotics, David Harold Schuetz
Compatibility And Stability Of 8% Amino Acids Solution In Combination With Electrolytes, Vitamins And Antibiotics, David Harold Schuetz
University of the Pacific Theses and Dissertations
For centuries, researchers have attempted to devise the ideal parenteral nutritional product readily amenable to physiological requirements. Hyperalimentation, intravenous alimentation, parenteral alimentation, parenteral feeding, and total parenteral nutrition are synonyms which refer to a method of complete intravenous nutrition reserved for patients demonstrating negative nitrogen balance.
The nutrient solution appeared to accommodate levels of potassium phosphate, calcium gluconate, and magnesium sulfate well in excess of “usual” therapeutic concentrations. Similarly, commonly employed vitamin supplements and insulin were examined in combination with the hyperalimentation solution and failed to demonstrate signs of physical incompatibility. However, instrumental analysis, i.e., U.V. spectroscopy and thin-layer chromatography, …
Maine Gems And Gem Minerals, Maine State Museum
Maine Gems And Gem Minerals, Maine State Museum
Maine Collection
Maine Gems and Gem Minerals
The Maine State Museum - Printed under Appropriation No. 1741.1
Sections Include : "An Introduction to the Gemstones of Maine", "Tourmaline", "Beryl", "Quartz Family Gems", "Topaz", "Gold", "Miscellaneous Gem Varieties", "Maine's 'Lost' Gem Mines", "Hamlin Necklace", etc
Oxidation Of Thin Silver Films By Ozone And Atomic Oxygen, Lawrence R. Thorne
Oxidation Of Thin Silver Films By Ozone And Atomic Oxygen, Lawrence R. Thorne
Undergraduate Honors Capstone Projects
Recently, thin silver film detectors have been used to determine atomic oxygen profiles in the 70-100 km region of the upper atmosphere. The detectors' sensitivity to atomic oxygen is the result of the formation of silver oxide(s) which cause their electrical resistance to increase. A common procedure to calibrate and to make these detectors more sensitive is to cycle them through a series of three or more oxidations and reductions. This paper indicates that this cycling makes silver films more sensitive to ozone, causing them to be usable only at heights greater than 38 km. Also reported herein are experimentally …
Soil Structure Changes Under Wheatbelt Farming Systems, T C. Stoneman
Soil Structure Changes Under Wheatbelt Farming Systems, T C. Stoneman
Journal of the Department of Agriculture, Western Australia, Series 4
A review of 14 years of Department of Agriculture research into the effects of wheatbelt fanning practices on soil structure reaches the general conclusion that cultivation and grazing practices influence soil structure, and that structure can be improved by soil amendments and pasture growth.
Little data has been obtained to relate plant growth to improved soil structure, as measured.
Investigation Of Surface Films - Chesapeake Bay Entrance, William G. Macintyre, Craig C. Smith, Et Al
Investigation Of Surface Films - Chesapeake Bay Entrance, William G. Macintyre, Craig C. Smith, Et Al
Reports
Experimental point source oil releases have been conducted in the Chesapeake Bay mouth area. Predictions of oil slick motion were tested, and slicks were sampled and analyzed to measure their aging rates over periods up to 32 hours. Remote sensing. techniques were used to detect and measure the spreading rate of oil. Some laboratory oil film aging experiments were done to further document and elucidate aging processes. Results indicate· a,reasonable motion prediction, an explanation of the non-biological initial aging of oil films, and a fair corroboration of a theoretical oil spreading model.
A Water Resource Management Model, Upper Jordan River Drainage, Utah, Bi-Huei Wang, James I. Felix, Rick L. Gold, Craig T. Jones, J. Paul Riley
A Water Resource Management Model, Upper Jordan River Drainage, Utah, Bi-Huei Wang, James I. Felix, Rick L. Gold, Craig T. Jones, J. Paul Riley
Reports
As demands upon available water supplies increase within a river basin, there is an accompanying increase in the need to assess the downstream consequences resulting from changes at specific locations within the hydrologic system. This problem is approached in this study by digital computer simulation of the hydrologic system. Modeling concepts are based upon basic relationships which describe the various hydrologic processes. Within a hydrologic system these relationships are linked by the continuity-of-mass principle which requires a mass balance at all points. Spatial resolution is achieved by considering the modeled area as a series of subbasins. The time increment adopted …
Head Losses Due To Ring-Tite Filament Wound Elbows And Tees And Frictional Losses In Pipes Of Polyvinylchloride, Roland W. Jeppson
Head Losses Due To Ring-Tite Filament Wound Elbows And Tees And Frictional Losses In Pipes Of Polyvinylchloride, Roland W. Jeppson
Reports
This study consists of collecting and analyzing experimental data to determine the Darcy-Weisbach friction factor for 6-inch and 4-inch PERMASTRAN® pipes and the head losses due to RING-TITE filament-wound 6-inch 90° elbows, a 6 x 6-inch tee under several modes of operation, and a 6 x 6 x 4-inch tee with the flow entering a 6-inch branch and leaving through the 4-inch branch. The test program consisted of 8 series of individual tests with each series giving data for flow rates for each series ranging from 150 gpm to either 1200 gpm or 1500 gpm depending upon the series. The …
Effect Of Air Bubble Solution On Air-Sea Gas Exchange, Larry P. Atkinson
Effect Of Air Bubble Solution On Air-Sea Gas Exchange, Larry P. Atkinson
CCPO Publications
Recent data on ambient wave generated oceanic bubble spectra (Medwin, 1970) permit the calculation of the influence of bubble solution on air-sea gas exchange. Schulkin's formula is used to estimate the depth variation of bubbles, and a square law is used to estimate the increase of bubble volume with wind speed. Calculations indicate that bubble solution can be a very significant factor in gas exchange. Bubble solution enhances gas input and retards degassing of the water column. Preliminary data show a lag time of about 5 hours in the response of the water column to an atmospheric pressure change.
Progress And Data Available For Investigations, D Tennant
Progress And Data Available For Investigations, D Tennant
Experimental Summaries - Plant Research
This report summarises progress and data available for the following investigations. 1. Fallow Re-assessment. 2. Root Penetration and Distribution in Wheat. 3. Moisture use by Lupins, Rape and Wheat. 4. Variety Investigations in respect of Root Growth. 72M29, 72MO41,
Some Aspects Of Mercury Accumulation By The Purple Shore Crab Hemigrapsus Nudus Dana (Crustacea: Decapoda), Ralph Gene Swanson
Some Aspects Of Mercury Accumulation By The Purple Shore Crab Hemigrapsus Nudus Dana (Crustacea: Decapoda), Ralph Gene Swanson
University of the Pacific Theses and Dissertations
The present study has attempted to investigate some of the more basic questions concerning the toxicity and accumulation of mercury in the purple shore crab, Hemigrapsus nudus. This rocky intertidal denizen is found in abundance along the entire Pacific coast of the United States from Sitka, Alaska, to the Gulf of California where it dominates the mid-tide pool region. Local specimens were collected just north of the Pacific Marine Stations, Dillon Beach, Marin County, California. The animal is hearty and can be kept in a state of good health for long periods of time in the laboratory with minimum care …
Bathymetry Of The Chesapeake Bay, Victor Goldsmith, Carolyn H. Sutton
Bathymetry Of The Chesapeake Bay, Victor Goldsmith, Carolyn H. Sutton
Reports
Coordinates: W 77⁰30ʹ--W 75⁰30ʹ/N 39⁰30ʹ--N 37⁰.
Bathymetry based on depths from National Ocean Survey sounding sheets, contoured to mean low water datum.
Scale 1:224,700 at 37⁰ latitude.
Original chart size 141x80cm. | 55.5x31.5inches
Bathymetric Chart Series No. 2.
A Report On Salinity And Oxygen Values In The Great Wicomico River In 1971 And L972 With Comments On The Low Set, Dexter Haven
A Report On Salinity And Oxygen Values In The Great Wicomico River In 1971 And L972 With Comments On The Low Set, Dexter Haven
Reports
Our studies in the Great Wicomico River showed that in 1971°':·oystefr larvae did not strike during early July in the usual number. In looking for a reason, we began to take samples for dissolved oxygen beginning on 12 July 1971. · Our studies showed that DO was low at the bottom from at least 12 July to 27 July. Salinity, according to limited data, ,~ appeared about average for the· season. (...)
Nuclear Magnetic Resonance In The Amorphous Transition Metal Vzr Alloy, Kwang Soo Han
Nuclear Magnetic Resonance In The Amorphous Transition Metal Vzr Alloy, Kwang Soo Han
Dissertations, Theses, and Masters Projects
No abstract provided.
Integrated Measurement Of Soil Moisture By Use Of Radio Waves, Duane G. Chadwick
Integrated Measurement Of Soil Moisture By Use Of Radio Waves, Duane G. Chadwick
Reports
An integrated value of soil moisture can be determine dby measuring the attenuation of vertically-polarized surface radio waves taht are propagated over the ground between a transmitting and receiving atenna. Soil moisture values in the root-zone region were measured over longitudinal distances typically ranging from 50 feet to 600 feet with good results. Integrated soil moisture measurements over greater distances are also possible. Received field strength of propaged radio surface waves closely matches theoretical calculations. The measurement is easily made and does not disturb the soil. Dense, green vegetation, such as alfalfa or corn, causes errors in measurement accuracy. Less …
Social, Economic, Environmental, And Technical Factors Influencing Water Reuse, A. Bruce Bishop, Suravuth Pratishthananda, John Keith, Craig Colton, A. Berry Crawford
Social, Economic, Environmental, And Technical Factors Influencing Water Reuse, A. Bruce Bishop, Suravuth Pratishthananda, John Keith, Craig Colton, A. Berry Crawford
Reports
A growing population together with rising per capita income has resulted in increased demand for water for virtually all uses. At the same time there has been increased public concern for maintaining the quality of streams for recreation, sight-seeing, and other social uses, and to conserve environmental values. A partial answer to these conflicts in water use and management is more extensive waste water reclamation and reuse. Heretofore, water salvage and reuse has been mainly practiced in specific operational cases, such as recycling industrial process water, or on an ad hoc basis, such as a series of diversions and subsequent …
A Preliminary Model Of The Hydrologic-Sociologic Flow System Of An Urban Area, Wade H. Andrews, J. Paul Riley, Craig W. Colton, George B. Shih, Malcolm B. Masteller
A Preliminary Model Of The Hydrologic-Sociologic Flow System Of An Urban Area, Wade H. Andrews, J. Paul Riley, Craig W. Colton, George B. Shih, Malcolm B. Masteller
Reports
This report describes the first phase of a larger study which is directed toward the development of a general technique for analyzing and solving urban metropolitan hydrologic problems through a joint consideration of both the physical and social dimensions. This report is limited to the preliminary work of identification of social variables, the first steps in assigning mathematical values to them, and developing a mathematical format for these variables. In addition, the physical-hydrologic system is identified for purposes of clarifying the elements in that system. The ultimate objective of the entire study is directed toward discovering a theoretical and generally …