Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physical Sciences and Mathematics (3531)
- Engineering (1932)
- Education (1722)
- Chemistry (781)
- Social and Behavioral Sciences (731)
-
- Electrical and Computer Engineering (701)
- Life Sciences (685)
- Environmental Sciences (627)
- Physics (618)
- Computer Sciences (567)
- Educational Leadership (404)
- Mathematics (371)
- Natural Resources and Conservation (332)
- Earth Sciences (326)
- Arts and Humanities (312)
- Optics (291)
- Electromagnetics and Photonics (279)
- Statistics and Probability (260)
- Mechanical Engineering (258)
- Curriculum and Instruction (248)
- Educational Assessment, Evaluation, and Research (236)
- Civil and Environmental Engineering (235)
- Educational Administration and Supervision (219)
- Medicine and Health Sciences (215)
- Science and Mathematics Education (197)
- Psychology (196)
- Computer Engineering (166)
- Electrical and Electronics (166)
- Teacher Education and Professional Development (165)
- Biochemistry, Biophysics, and Structural Biology (158)
- Institution
- Keyword
-
- College of Natural Science and Mathematics (259)
- Morgridge College of Education (253)
- Daniel Felix Ritchie School of Engineering and Computer Science (241)
- Education (188)
- Mathematics (121)
-
- Biological Sciences (92)
- Machine learning (86)
- Chemistry and Biochemistry (77)
- College of Arts Humanities and Social Sciences (67)
- Simulation (62)
- Teaching and Learning Sciences (61)
- Electrical and Computer Engineering (60)
- Computer Science (57)
- Research Methods and Statistics (52)
- Research Methods and Information Science (51)
- Professional development (50)
- School administration (50)
- Technology (48)
- Curriculum and Instruction (46)
- Geography and the Environment (45)
- Leadership (43)
- Mechanical and Materials Engineering (43)
- Academic achievement (42)
- Graph theory (42)
- Modeling (42)
- Retention (41)
- Student achievement (41)
- Self-efficacy (40)
- Special education (39)
- Physics and Astronomy (37)
- Publication Year
- File Type
Articles 8701 - 8730 of 9775
Full-Text Articles in Entire DC Network
Experimental Study Of A Tunnel Liner Subjected To Excavation Loading / By Mohamed Zain Bin Yusuf, Mohamed Zain Bin Yusuf
Experimental Study Of A Tunnel Liner Subjected To Excavation Loading / By Mohamed Zain Bin Yusuf, Mohamed Zain Bin Yusuf
Electronic Theses and Dissertations
No abstract provided.
The Kinetics Of 2-Chloroethanol Degradation In Aqueous Media, Masood Ahmad Chowhan
The Kinetics Of 2-Chloroethanol Degradation In Aqueous Media, Masood Ahmad Chowhan
Electronic Theses and Dissertations
No abstract provided.
A Method For Obtaining Thermal Stresses In Composite Plates Caused By Transient Conduction, Chih-Tai Keng
A Method For Obtaining Thermal Stresses In Composite Plates Caused By Transient Conduction, Chih-Tai Keng
Electronic Theses and Dissertations
No abstract provided.
The Development Of Children's Literature In The Eighteenth Century And Its Effects On Children's Literature In The Twentieth Century, Crenola Sneed Coleman
The Development Of Children's Literature In The Eighteenth Century And Its Effects On Children's Literature In The Twentieth Century, Crenola Sneed Coleman
Electronic Theses and Dissertations
No abstract provided.
Substitution Spaces, James Robert Bowers
Substitution Spaces, James Robert Bowers
Electronic Theses and Dissertations
No abstract provided.
A Description Of The Role Of The Public School Science Supervisor: 1895 To 1976, Judy Harmon
A Description Of The Role Of The Public School Science Supervisor: 1895 To 1976, Judy Harmon
Electronic Theses and Dissertations
The Problem. The problem was to investigate the role of the public school science supervisor in the United States as perceived by recognized authorities, through the identification and description of beginnings, developments, trends, and projections found in scientific and educational literature. (Abstract shortened.)
Out Of Tennessee Poems, With An Introduction, Roy Neil Graves
Out Of Tennessee Poems, With An Introduction, Roy Neil Graves
Electronic Theses and Dissertations
No abstract provided.
Markov Chains With Denumerable State Spaces, Thomas Daniel Yates
Markov Chains With Denumerable State Spaces, Thomas Daniel Yates
Electronic Theses and Dissertations
No abstract provided.
A New Procedure For Calculating Dipolar Sources Of Eeg Discharges., Joseph Harvey Rothweiler 1952-
A New Procedure For Calculating Dipolar Sources Of Eeg Discharges., Joseph Harvey Rothweiler 1952-
Electronic Theses and Dissertations
A new procedure has been developed for determining the location of the source of certain EEG discharges given the measured surface potentials. The source is modeled as a single current dipole with arbitrary position and orientation, while the head is modeled either as a single homogeneous sphere or as three concentric spheres. This procedure is developed by extending the matched filter concept of communications theory to functions defined on a spherical surface. In addition, simplifications are developed which reduce the amount of computation required. Simulations have been performed using computer generated data to show the validity of the locating procedure …
The Status Of Science Supervision In Florida School Districts, Roy F. Ellis
The Status Of Science Supervision In Florida School Districts, Roy F. Ellis
Electronic Theses and Dissertations
No abstract provided.
Factors Affecting Waterfowl Brood Use Of Stock Ponds In South Dakota, Gene D. Mack
Factors Affecting Waterfowl Brood Use Of Stock Ponds In South Dakota, Gene D. Mack
Electronic Theses and Dissertations
A July waterfowl brood survey was conducted from 1973 to 1976 on stock ponds located within four physiographic strata in South Dakota. Information was collected on weather, stock pond characteristics, land use and the condition of other wetlands located within the quarter section (64.8 ha) study plots. Multiple regression and multiple discriminant analyses were sued to determine the importance of these variables in influencing brood use of stock ponds. Vegetation type, distribution of emergent vegetation and pond size were important in determining if broods of any particular species utilized a pond or not. Shoreline distance was particularly important in explaining …
Variables Associated With Breeding Waterfowl On South Dakota Stock Ponds, Jay A. Roberson
Variables Associated With Breeding Waterfowl On South Dakota Stock Ponds, Jay A. Roberson
Electronic Theses and Dissertations
Use of stock watering ponds by indicated breeding pairs of waterfowl was measured in the western two-thirds of South Dakota from 1973 to 1976. Multiple regression and discriminant analyses were used to describe the habitat associated with pairs of each species. Habitat variables explained 35-47 percent of the variation in pairs having small home ranges and 26-35 percent of the variation in pairs having large home ranges. Shoreline distance account for more variation in mallard (Anas Platyrhmchos) and blue-winged teal (A. discors) pairs than any other single variable. Ponds used by these pairs and shoreline distances that averaged 590 m …
Population, Home Range, And Dispersal Of Red Foxes In East-Central South Dakota, James D. Sweeting
Population, Home Range, And Dispersal Of Red Foxes In East-Central South Dakota, James D. Sweeting
Electronic Theses and Dissertations
The population, dispersal movements and summer home range of red foxes (Vulpes vulpes) were studied in east-central South Dakota during 1974 and 1975. The spring population density of foxes on a 23,319 ha study area declined from 9.2 families/township in 1974 to 7.6 families/township in 1975. Fifty-four percent of 130 foxes tagged in spring, 1974 and 1975 were recovered during the first year following tagging. Hunting and trapping accounted for 18.0 and 77.8 percent, respectively. Recoveries revealed that dispersing juvenile male foxes were more mobile than juvenile females; juvenile foxes traveled a mean distance of 39 km for males and …
The Minnesota River Lowland : An Area Study, Ronald R. Crawford
The Minnesota River Lowland : An Area Study, Ronald R. Crawford
Electronic Theses and Dissertations
This thesis is a systematic-area geographical study of the extreme northeastern part of South Dakota known as the Minnesota River Lowland (Fig.1). Most of the Minnesota River Lowland region lies in Minnesota and North Dakota, but this study will be limited to that area if the region within South Dakota. This area study is not limited to one criterion such as location, climate, or human occupance. Rather, it incorporates the sum total of all the criteria included in a systematic-regional study.
Project Remand : Estimating Probability Of Failure To Appear, Glen Arthur Just
Project Remand : Estimating Probability Of Failure To Appear, Glen Arthur Just
Electronic Theses and Dissertations
The study investigated the following problem: What is the best estimator of failure to appear (FTA) for felons in Ramset County, Minnesota, who are released into the community during their pretrial period? An estimator of FTA and nonFTA probabilities was derived with the aid of stepwise discriminant analysis. The method demonstrates the expost facto ability to correctly place 98 percent of the nonFTA’s and 30 percent of the FTA’s in the 1975 sample. The overall total group placement, due to the large percentage of nonFTA’s in the sample, was approximately 90 percent. Even though it is recognized that multiple regression …
Cover Use And Activity Time Budget Of Blue-Winged Teal, Mallard, And Pintail Broods, James K. Ringelman
Cover Use And Activity Time Budget Of Blue-Winged Teal, Mallard, And Pintail Broods, James K. Ringelman
Electronic Theses and Dissertations
Blue-winged teal (Anas discors), mallard (A. platyrhynchos), and pintail (A. acuta) broods were observed on 17 days between 25 June and 30 July, 1976. Brood activities and cover uses were recorded continuously from first light until dark. Observations of 269 broods from three wetlands were evaluated by species and brood age-class. Activity time budgets revealed significant (p<.01) age specific differences in total feeding time and visibility among age-classes of all species combined and age-classes of blue-winged teal broods. Feeding modes also varied among age-classes. Daily patterns of cover use varied among brood age-classes and species. Morning and evening feeding peaks became more pronounced, and overall visibility increased, with brood age. Interspecific differences in daily activity patterns were observed among broods of the same age-class. Duration of active periods increased with age in blue-winged teal broods. Active periods recurred at regular intervals in all broods throughout the day, suggestive of polycyclic behavior patterns similar to those of adult ducks. A progressive increase in brood visibility was attributed primarily to seasonal changes in brood age structure and to wetland water loss. Temperature and wind speed influenced brood visibility during most observation days. Climatic conditions favorable to nighttime brood activity influenced brood behavior during the following day. Accuracy of present brood inventory techniques could be improved if considerations were made for brood behavior patterns and environmental factors which alter brood cover use.
Estimate Of Production By A Population Of Fathead Minnows, Pimpephales Promelas, In A South Dakota Prairie Wetland, Ronald D. Payer
Estimate Of Production By A Population Of Fathead Minnows, Pimpephales Promelas, In A South Dakota Prairie Wetland, Ronald D. Payer
Electronic Theses and Dissertations
Estimates of production and population densities were obtained for an autochthonous population of fathead minnows, Pimephales promelas Rafinesque, in a South Dakota prairie wetland. The study was conducted from May to September of 1976. Population estimates were obtained using a Schnabel-type mark and recapture model. Fish were marked either by fin clipping or granular fluorescent pigments driven into the dermal tissue. Production estimates were derived both arithmetically and graphically. The estimated population of adult fathead minnows declined from 194 in May and June to 26 in July. Production by adults was estimated at 0.10 kg, or 0.0007 gm/m²/yr. The population …
Digestibility Of Common Forage Plants And Energetic Requirements Of The Black-Tailed Prairie Dog, Maureen A. Beckstead
Digestibility Of Common Forage Plants And Energetic Requirements Of The Black-Tailed Prairie Dog, Maureen A. Beckstead
Electronic Theses and Dissertations
Black-tailed prairie dogs (Cynomys ludovicianus) assimilated 51.5 percent of the wheatgrass (Agropyron intermedium) they consumed; thus, they would have to consume 0.148 kcal · g-1 · day-l in order to obtain the 0.076 kcal · g-1 · day-1 they would require to maintain their weight. Prairie dogs assimilated 31.5 percent of the buffalograss/blue grama mixture (Buchloe dactyloides/Bouteloua gracilis) they were fed. They would have to consume 0.229 kcal · g-1 · day-1 of this forage to assimilate 0.072 kcal · g-1 · day-1 and maintain their weight. The proximate composition of forages fed in feeding trials was similar to that …
Wildlife Habitat Evaluation Of The Unchannelized Missouri River In South Dakota, James R. Clapp
Wildlife Habitat Evaluation Of The Unchannelized Missouri River In South Dakota, James R. Clapp
Electronic Theses and Dissertations
Areas of eight habitats were identified, delineated, and measured along the unchannelized Missouri River in South Dakota. Agricultural and urban developments existed on 60 percent of the land within 1 km of the river. Six habitat types made up the non-developed land in the study area: cottonwood-dogwood (16 percent), cottonwood-willow (9 percent), elm-oak (7 percent), cattail marsh (3 percent), sand dune (3 percent), and sand bar (1 percent). All non-developed habitats except sand bar were sampled to obtain vegetative composition and to determine their value to wildlife. The value of each habitat to nine faunal groups of wildlife was subjectively …
Biology Of The Porcupine (Erethizon Dorsatum) In Northwestern South Dakota, Judith Johnson
Biology Of The Porcupine (Erethizon Dorsatum) In Northwestern South Dakota, Judith Johnson
Electronic Theses and Dissertations
The summer home ranges, food habits, cover preferences, population dynamics, metabolic rates, growth rates, and taxonomic characteristics were determined for porcupines (Erethizon dorsatum) in northwestern South Dakota. The summer home ranges were 158.2 ha for adult females, 90.4 ha for juveniles, and 57.9 ha for adult males. The population was 34 percent adult males, 16 percent juvenile males, 34 percent adult females, and 15 percent juvenile females. The preferred daytime cover choice was silver buffaloberry (Shepherdia argentea), followed by snowberry (Symphoricarpos occidentalis), earth dens, forbs, and low brush. Shrubs were the most important item in the diet, then trees, forbs, …
Dick And Jane Grow Up : Trends In Fiction For Young Adults, Nancy Veglahn
Dick And Jane Grow Up : Trends In Fiction For Young Adults, Nancy Veglahn
Electronic Theses and Dissertations
The YA novel may be defined, then, as a work of fiction intended and published especially for readers between the ages of thirteen and eighteen. The distinction is to some degree an artificial one created by the realities of publishing. If a book is purchased by the juvenile division of a publishing company, it is presented as a YA novel. The same book might conceivably have been bought and published by the adult division of the same company, in which case it would be considered an adult book. There is some crossing back and forth across these artificial barriers. YA …
Food, Growth, And Reproduction Of White Crappies (Pomixis Annularis) And Black Crappies (P. Nigromaculatus) In Lake Poinsett, South Dakota, Thomas R. Busiahn
Food, Growth, And Reproduction Of White Crappies (Pomixis Annularis) And Black Crappies (P. Nigromaculatus) In Lake Poinsett, South Dakota, Thomas R. Busiahn
Electronic Theses and Dissertations
The food habits, food selectivity, growth, condition, and population structures of the white crappies (Pomoxis annularis) and black crappies (P. nigromaculatus) in Lake Poinsett, South Dakota, were studied from May, 1975, to May, 1976. The total food volume of 173 adult white crappies consisted of 59.0% plankton1o crustaceans, 25.2 % insects, 14.5 % fish, and 1.3 % miscellaneous organisms. The food volume of 39 adult black crappies consisted of 39.0 % planktonic crustaceans, 3.5 % insects, 57.8 % fish, and 0.7 % miscellaneous organisms. Both species selected Daphnia pulex over other zooplankton and probably contributed to its decline from 193.8/l …
Probabilities Of Solar Weather, Hand-Hung Chen
Probabilities Of Solar Weather, Hand-Hung Chen
Electronic Theses and Dissertations
During the last several years we have witnessed increasing costs and shortages of energy from conventional sources. This “energy crisis” promises to be with us for some time to come unless we change our way of life and in addition develop new sources of energy. The energy crisis is spurring the development of several new energy have been considered including heating and cooling of homes, domestic hot water heating, drying of agricultural products and many more. The economic feasibility of a solar system depends upon how well the system perform in the particular location in which it is to be …
On Bloch's Constant / By James Robert Rogers, James Robert Rogers
On Bloch's Constant / By James Robert Rogers, James Robert Rogers
Electronic Theses and Dissertations
No abstract provided.
A Study Of Statistical Procedures Used In Pharmacy Education, Randy Ray Moore
A Study Of Statistical Procedures Used In Pharmacy Education, Randy Ray Moore
Electronic Theses and Dissertations
No abstract provided.
Microencapsulation Of Naloxone Hydrochloride And In Vitro Studies, Syed Ehtisham Hussain Abidi
Microencapsulation Of Naloxone Hydrochloride And In Vitro Studies, Syed Ehtisham Hussain Abidi
Electronic Theses and Dissertations
No abstract provided.
Differences In Emotional Expressiveness Of Love, Hate, Happinessand Sadness Of Males And Females / By John Wallace Trepp, Jr, John Wallace Trepp
Differences In Emotional Expressiveness Of Love, Hate, Happinessand Sadness Of Males And Females / By John Wallace Trepp, Jr, John Wallace Trepp
Electronic Theses and Dissertations
No abstract provided.
Subharmonic Functions / By Allen Ohmer Smithers, Allen Ohmer Smithers
Subharmonic Functions / By Allen Ohmer Smithers, Allen Ohmer Smithers
Electronic Theses and Dissertations
No abstract provided.
Internal Migration In The East South Central Division Of The United States : An Analysis Of Primary, Secondary, And Return Migration Patterns, 1955-1960 And 1965-1970, Laurie Alper Perper
Internal Migration In The East South Central Division Of The United States : An Analysis Of Primary, Secondary, And Return Migration Patterns, 1955-1960 And 1965-1970, Laurie Alper Perper
Electronic Theses and Dissertations
No abstract provided.
The Christian Humanism Of Fulke Greville, Marie Mullins Goodwin
The Christian Humanism Of Fulke Greville, Marie Mullins Goodwin
Electronic Theses and Dissertations
No abstract provided.