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Articles 44401 - 44430 of 44818
Full-Text Articles in Entire DC Network
Sample Size Required For Estimating The Standard Deviation As A Percent Of Its True Value, Joseph A. Greenwood, Marion M. Sandomire
Sample Size Required For Estimating The Standard Deviation As A Percent Of Its True Value, Joseph A. Greenwood, Marion M. Sandomire
United States Navy: Publications
One frequently encounters the need of a rational selection of sample size when it is desired to estimate the standard deviation. Changing the permissible error of the estimate from an absolute to a relative one is acceptable in many cases and permits an exact, a priori solution to the problem of sample size without involving any previous estimates.
A New Species Of The Acanthocephalan Genus Arhythmorhynchus From Sandpipers Of Alaska, Harley J. Van Cleave, Robert L. Rausch
A New Species Of The Acanthocephalan Genus Arhythmorhynchus From Sandpipers Of Alaska, Harley J. Van Cleave, Robert L. Rausch
Harold W. Manter Laboratory of Parasitology: Faculty Publications
In the spring of 1949, a survey of the parasites of birds of Alaska, especially in the vicinity of Juneau, was conducted by Robert L. Rausch and Ralph B. Williams. Among the Acanthocephala encountered there were specimens of the genus Arhythmorhynchus in two species of sandpipers, Erolia ptilocnemis couesi (Ridgway) (the Aleutian sandpiper) and Erolia alpina pacifica (Vieillot) (the red-backed sandpiper). This parasite was present in such numbers as to make morphological and taxonomic study profitable. The species is clearly distinct from all other members of the genus and is here described as Arhythmorhynchus comptus n. sp.
Notes On Microtine Rodents From The Brooks Range, Arctic Alaska, Robert L. Rausch, David H. Johnson
Notes On Microtine Rodents From The Brooks Range, Arctic Alaska, Robert L. Rausch, David H. Johnson
Harold W. Manter Laboratory of Parasitology: Faculty Publications
In connection with parasitological studies carried on during 1949 for the U.S. Public Health Service, the writer collected a considerable number of mammals from the northern edge of the "Endicott" section of the Brooks Range, in Arctic Alaska. The mammalian fauna of this region is poorly known, since apparently no previous collecting has been done here. About 200 microtine rodents were collected, mostly near Tolugak Lake (latitude 68° 24' N, longitude 151° 26' W), near the head of the Anaktuvuk River Valley. A few specimens were also taken at Umiat, on the Colville River, about 80 miles north of Tolugak …
It's Time To Take Stock
United States Environmental Protection Agency: Publications
Likening colleges and universities to the automobile industry may seem far-fetched, but is it? Each is engaged in fashioning and selling necessary products- one trained men, the other mechanical equipment. Both entered the post-war years with production at low ebb; unable to satisfy pent-up customer demands. Time and high-speed assembly lines have bridged the gap of gas buggy shortage. The impact of selective buying by a discriminating public is now real cause for concern among some of the motor moguls. Rumor has had it that schools teaching wildlife management are overproducing. We decided to gather facts and opinions at the …
Whole Issue Nebraska Bird Review (April 1950) 18(2)
Whole Issue Nebraska Bird Review (April 1950) 18(2)
Nebraska Bird Review
Contents
Twenty-five Year Summary of Bird Migration in Nebraska, Part 2.....William F. Rapp, Jr. ..............23
News and Notes ..............25
Report of the Membership Committee 29
Wildfowl Sketches....C.G. Pritchard ..............30
Announcements ..............32
General Notes ..............32
Periodicals in the Nebraska Ornithologists' Union Library ..............36
Book Reviews ..............39
Observations On Histopathological Changes Associated With Starvation In Wisconsin Deer, Robert L. Rausch
Observations On Histopathological Changes Associated With Starvation In Wisconsin Deer, Robert L. Rausch
Harold W. Manter Laboratory of Parasitology: Faculty Publications
Heavy winter losses in deer, apparently resulting directly from an inadequate food supply, have long been known in the United States. The general situation has been well reviewed by Leopold (1943) and by Leopold, Sowls, and Spencer (1947). There is a conservable volume of literature available concerning deer starvation from the management standpoint. The ill-advised attempts at the total destruction or, at best, the severe reduction of natural predator on deer have resulted in the removal of this important population control.
Effects Of Different Intensities Of Grazing On Depth And Quantity Of Roots Of Grasses, J. E. Weaver
Effects Of Different Intensities Of Grazing On Depth And Quantity Of Roots Of Grasses, J. E. Weaver
Department of Agronomy and Horticulture: Faculty Publications
The writer has been interested in prairies, pastures, and root depth and distribution over a period of many years. He had the privilege of examining these relationships in the Palouse prairie of Washington long ago while numerous representative areas still remained in a virgin condition (5, 6). Extensive studies have been made in the hardlands of Colorado, Kansas, and Nebraska many years before, during, and following the great drought of 1933-40 (7, 8, 1, 11). Vegetation and root habits have been studied in sand hills (7, 8, 4), in bluffs of wind-blown loess (12), and wet soils of lowland. The …
Microorganisms And Soil Structure, T. M. Mccalla
Microorganisms And Soil Structure, T. M. Mccalla
Department of Agronomy and Horticulture: Faculty Publications
SUMMARY
Laboratory tests were made to determine the effectiveness of different compounds and microbial groups in increasing the stability of Peorian loess lumps against the action of falling water drops. The influence of these on percolation tests in the laboratory was also determined.
Many organic substances-dextrose, sucrose, starch, peptone, cullulose, and gum arabic-did not themselves contribute directly to soil-structure stability, though these substances do furnish energy material for soil microorganisms, which can convert them readily into either microbial tissue or decomposition products that increase soil-structure stability. Lignin, proteins, oils, fats, waxes, resin, and paraffin increased the stability of lumps of …
Dairy Club Manual--The Heifer And Producing Cow : Extension Circular 6-11-2, C W. Nibler, M. N. Lawritson
Dairy Club Manual--The Heifer And Producing Cow : Extension Circular 6-11-2, C W. Nibler, M. N. Lawritson
Nebraska 4-H Clubs: Historical Materials and Publications
Complete 4-H dairy calf project which extends over three years. Describes all you need to know about raising a dairy calf.
Abridged Bibliography Of Photographic Interpretation : Selected With Emphasis Upon Keys, Techniques, And Research, J. H. Roscoe, S. D. Wells, V. W. Pace, Robert L. Bolin , Depositor
Abridged Bibliography Of Photographic Interpretation : Selected With Emphasis Upon Keys, Techniques, And Research, J. H. Roscoe, S. D. Wells, V. W. Pace, Robert L. Bolin , Depositor
United States Department of Defense Military Intelligence
This bibliography, PIC Report No. 102A/50, is a literature review of the applications of aerial photography. It is a classified list covering applications for archaeology, engineering, forestry, geography, geology, soil science, and the study of vegetation.
The copy used to create this digital document was borrowed from the Maury Oceanographic Library, Stennis Space Center, MS.
Whole Issue Nebraska Bird Review (Jan 1950) 18(1)
Whole Issue Nebraska Bird Review (Jan 1950) 18(1)
Nebraska Bird Review
Contents
Nesting Birds on a Keith County Farm.............Mrs. Carl N. Collister .............1
Twenty-five Year Summary of Bird Migration in Nebraska
William F. Rapp .............5
Announcements .............11
Pictorial Study of a nesting Eastern Red-Wing.....Adrian C. Fox .............12
General Notes .............14
Membership List............. 18
Book Reviews .............21
Studies On Some North American Shrew Cestodes, Robert L. Rausch
Studies On Some North American Shrew Cestodes, Robert L. Rausch
Harold W. Manter Laboratory of Parasitology: Faculty Publications
In spite of the importance of the various species of shrews to the biotic community, several aspects of their ecology remain very incompletely known. The helminths parasitic in the more conspicuous small mammals in North America have been studied more or less completely, but those occurring in shrews have been largely disregarded. This situation is particularly inappropriate when one considers that shrews often constitute the most abundant mammalian group in a given area. We have attempted to secure an adequate amount of shrew helminth material for study, and it is the purpose of this paper to present observations resulting from …
The Occurrence Of Contracaecum Travassosi (Nematoda) In North America [Research Notes], Banner Bill Morgan, Robert L. Rausch, Everett Schiller
The Occurrence Of Contracaecum Travassosi (Nematoda) In North America [Research Notes], Banner Bill Morgan, Robert L. Rausch, Everett Schiller
Harold W. Manter Laboratory of Parasitology: Faculty Publications
Seven specimens of a nematode (five males and two females) of the genus Contracaecum were collected from the ventriculus of Pandion haliaetus carolinensis (Gmelin) (osprey) captured at Greenville, Ohio. After a comparison with C. travassosi described by Gutierrez (1943. Sobre la morfología de una nueva especie de "Contracaecum" (Nematoda: Ascaroidea) Rev. Brasil. Biol. 3: 159-172) from the cormorant (Phalacrocorax albiventer) collected at the San Jose light-house, Territory of Chubut, Argentina, our material has been assigned to that species. So far as the writers have been able to determine, this is the first record of the species …
A Critical Study Of North American Cestodes Of The Genus Andrya With Special Reference To A. Macrocephala Douthitt, 1915. (Cestoda: Anoplocephalidae), Robert L. Rausch, Everett Schiller
A Critical Study Of North American Cestodes Of The Genus Andrya With Special Reference To A. Macrocephala Douthitt, 1915. (Cestoda: Anoplocephalidae), Robert L. Rausch, Everett Schiller
Harold W. Manter Laboratory of Parasitology: Faculty Publications
Eight species of cestodes belonging to the genus Andrya Railliet, 1883, have been described from North American rodents. To the present time, 6 of these have been considered valid (A. primordialis Douthitt, 1915; A. macrocephala Douthitt, 1915; A. neotomae Voge, 1946; A. microti Hansen, 1947; A. sciuri Rausch, 1947; A. ondatrae Rausch, 1948). The genus Andrya was separated by Kirschenblatt (1938) into two subgenera, depending upon the presence or absence of a prostate gland. Of the North American species, only one (A. primordialis) possesses a prostate gland. Since we are concerned essentially with the other 5 closely-related …
62nd Annual Report, Agricultural Experiment Station, University Of Nebraska College Of Agriculture, May 1949
Agricultural Research Division: News and Annual Reports
Contents
Cover Picture-Dr. Ephriam Hixson, Experiment Station entomolO
Soils Research Erosion Control and Moisture Conservation, Soil Microbiology and Crop Residue Management, Heavy Minerals in Scott Silt Loam, Soil Structure, Phosphorus in an Irrigated Tripp Soil, Properties of Sandy Soils in Northeastern Nebraska, Soil Factors Influencing Sugar Content of Sugar BPets, Commercial Fertilizers for Sugar Beets, Relation of Soil Nitrification Rate and Nitrogen Content of the Corn Leaf to Corn Yield, Fertilizers for Irrigated Corn, Fertilizers for Winter Wheat, Anhydrous Ammonia for Winter Wheat.
Field Crops Research Corn Improvement, Annual Variations in Corn Yield and Weather, Sorghum Improvement, Improvement of Small …
How To Write Comedy For Radio, Johnny Carson
How To Write Comedy For Radio, Johnny Carson
Johnny Carson School of Theatre and Film: Theses, Student Research, and Creative Work
Entertainment and television icon Johnny Carson received his bachelor of arts degree in radio and speech (with a minor in physics) in 1949 from the University of Nebraska. While at Nebraska, he was a member of Phi Gamma Delta fraternity and served as master of ceremonies for the Kosmet Klub, a male dramatic society.
Before completing his bachelor of arts degree, Carson did a senior thesis for his broadcasting professor, William Dempsey. His 1949 senior thesis was entitled “How to Write Comedy for Radio,” which he recorded on a reel-to-reel tape. The 45-minute recording was a scholarly examination of the …
The Frost-Moved Rubbles Of Jumbo Dome And Their Significance In The Pleistocene Chronology Of Alaska, Clyde Wahrhaftig
The Frost-Moved Rubbles Of Jumbo Dome And Their Significance In The Pleistocene Chronology Of Alaska, Clyde Wahrhaftig
United States Geological Survey: Staff Publications
Jumbo Dome, a prominent landmark on the north side of the Alaska Range, is a small body of intrusive andesite surrounded by schist and by poorly consolidated sediments of Tertiary age. Frost-moved rubbles, consisting of coarse andesite blocks, almost completely mantlethe dome and have advanced outward from it across a gently sloping terrain for distances as much as 1 ¼ miles. Several different periods of rubble development are recognized, based on the amount of vegetal covering of the deposits, the preservation of their surface forms, and their degree of erosion by fluvial processes. The rubbles are not now moving and …
Safflower Production In The Western Part Of The Northern Great Plains, C. E. Classen
Safflower Production In The Western Part Of The Northern Great Plains, C. E. Classen
Nebraska Agricultural Experiment Station: Historical Circulars
Recent development of new varieties with seeds averaging more than 30 per cent oil give safflower a good chance of becoming an important oil seed crop in the United States. It is the purpose of this circular to acquaint farmers with the crop and to outline the most promising production practices for those who undertake its production in the western part of the northern Great Plains.
Some Additional Observations On The Morphology Of Dendrouterina Botauri Rausch, 1948 (Cestoda: Dilepididae), Robert L. Rausch
Some Additional Observations On The Morphology Of Dendrouterina Botauri Rausch, 1948 (Cestoda: Dilepididae), Robert L. Rausch
Harold W. Manter Laboratory of Parasitology: Faculty Publications
The scolex has never been described for cestodes of the genus Dendrouterina Fuhrmann, 1912. The two species belonging to this genus, D. herodiae Fuhrmann, 1912, and D. botauri Rausch, 1948, were described from incomplete material. Because of the lack of a scolex, this genus was only tentatively placed by Fuhrmann (1912) in the family Dilepididae.
Persistent collecting during the spring migration of 1948 made possible the examination of a number of bitterns, Botaurus l. lentiginosus (Montagu). A single bird, collected on May 5, 1948, at Madison, Wisconsin, was found to be infected with two specimens of Dendrouterina botauri. Observations …
Annual Report: 1949
Cherry County (Nebraska) Extension: Historical Documents
Annual Program & Accomplishments ...................... 14
Budget Estimate ...................... 18
Cherry County Extension Districts (Map) ...................... 19
Cherry County 4-H Clubs (Map) ...................... 31
Cherry County Non-Stpck Cooperative Labor Association ......................13
Clarke McNary Forestry Cooperators (Graph) ...................... 58
Clothing, Family Economics & Community Life ...................... 75
Conservation of Natural Resources ...................... 60
Crop Production ...................... 36
Distribution of Windbreak Plantings (Map) ...................... 59
4-H Club Work ...................... 30
Farm Labor (Graph) ...................... 66
Farm Management ...................... 65
Feature Story ...................... 84
Form of Organization ...................... 20
General Economic Problems ...................... 67
History of 4-H Enrollment & Completion ...................... 32
Home …
Numerical Index To The Bibliography Of Scientific And Industrial Reports, Vols. I-X (1946-48), Science-Technology Group, Special Libraries Association, Robert L. Bolin Depositor
Numerical Index To The Bibliography Of Scientific And Industrial Reports, Vols. I-X (1946-48), Science-Technology Group, Special Libraries Association, Robert L. Bolin Depositor
Electronic Reference Materials
I. The Numerical Index and the Correlation Index, which was digitized previously, (http://digitalcommons.unl.edu/libelecrefmat/4/) are indexes to using the Bibliography of Scientific and Industrial Reports which is a predecessor of Government Reports Announcements and Index and the National Technical Information Service (NTIS) online database.
II. Some of the issues of the Bibliography of Scientific and Industrial Reports are available on the Web in two locations:
A. Volumes digitized by the Hahti Trust are available at: http://catalog.hathitrust.org/Record/009487225
B. Some entrys from the first volume area available in an XML database at: http://www.unl.edu/Bolin_resources/bsir-xml/
III. The Publication Board assigned PB numbers to …
Circular 87, Safflower Production In The Western Part Of The Northern Great Plains, 1949
Circular 87, Safflower Production In The Western Part Of The Northern Great Plains, 1949
University of Nebraska Historical Extension: Bulletin
Circular 87, Safflower Production in the Western Part of the Northern Great Plains, 1949
The Lemming Vole, Synaptomys Borealis, In Northern Minnesota, Ralph M. Wetzel, Harvey L. Gunderson
The Lemming Vole, Synaptomys Borealis, In Northern Minnesota, Ralph M. Wetzel, Harvey L. Gunderson
University of Nebraska State Museum: Mammalogy Papers
Lemming voles of the subgenus Mictomys have never been recorded from north-central United States, although they might be expected to occur there judging from records of the species Synaptomys (Mictomys) borealis from southern Manitoba. Recently, examination of specimens in the collection of the Minnesota Museum of Natural History reveals that Synaptomys borealis does occur in north-central United States for we have found the following specimens referable to that species: one immature female (No. 951, MMNH) from Williams, Lake of the Woods County, Minnesota, collected by Gustav Swanson, August 5, 1932; one adult male (No. 2552, MMNH) from Warroad, Roseau County, …
Management Of Native Deer In Nebraska, John H. Wampole, Edson Fichter
Management Of Native Deer In Nebraska, John H. Wampole, Edson Fichter
Nebraska Game and Parks Commission: Publications
Deer are on the increase in Nebraska. Reports of deer seen, of deer killed on highways, and of localized cases of damage to crops by deer have become increasingly frequent during the last ten years. Since Nebraska is not primarily a land of forests nor of great repute as a deer state, the presence of these mammals in more than rare occurrences arouses considerable interest-and creates new problems in wildlife management.
It is the purpose of these notes to answer some of the questions most commonly asked about deer in Nebraska, and to point out certain misunderstandings which have led …
Effects Of Weather, Sanitation And Chlorinated Chemical Residues On House And Stable Fly Populations On Nebraska Farms, Martin H. Muma, Ephriam Hixson
Effects Of Weather, Sanitation And Chlorinated Chemical Residues On House And Stable Fly Populations On Nebraska Farms, Martin H. Muma, Ephriam Hixson
Department of Entomology: Faculty Publications
Since L. O. Howard's (1906) early report on house flies many entomologists have conducted research on these insects. Their reports range from notes on the hibernation of house flies, Musca domestica L., to lengthy papers on the biology and control of house flies and stable flies, Stomoxys calcitrans (L.). Early control studies stressed the importance of sanitatioll, screening and the use of mist type contact insecticides. These standard control measures have not, however, received much attention in the United States since Wiesmann (1943) reported on the pro-longed effectiveness of a new insecticide "Gesarol." Scores of other workers have also published …
Use Of Motion Pictures In Laboratory Dynamical Studies, Carl Bailey, Jaan Jurisson, M. Eugene Rudd
Use Of Motion Pictures In Laboratory Dynamical Studies, Carl Bailey, Jaan Jurisson, M. Eugene Rudd
M. Eugene Rudd Publications
In student laboratory experiments in dynamics, as, for example, Newton's second law of motion or the conservation of momentum, it is, of course, highly desirable to allow motion with the least possible constraint and to observe the displacements of moving parts without using perturbing markers. This circumstance has led us to use motion pictures in the student laboratory for quantitative observation of rapid dynamic processes, a technique which is used in a well-known textbook.' The photographic method combines maximum freedom of movement with accurate observation of position as a function of time, if the camera frame speed is sufficiently high. …
The Occurrence Of Platynosomum Illiciens (Braun, 1901) In A North American Hawk., J. Fred Denton, Robert Rausch
The Occurrence Of Platynosomum Illiciens (Braun, 1901) In A North American Hawk., J. Fred Denton, Robert Rausch
Harold W. Manter Laboratory of Parasitology: Faculty Publications
A series of 160 hawks of 12 species from ten states and the Province of Manitoba has been examined for dicrocoeliid trematodes. Only one species of dicrocoeliids was found in them indicating the infrequency with which North American hawks are infected with trematodes of this group.
Of the 160 hawks examined 4 were broad-winged hawks. Buteo platypterus, 2 of which, collected in Ohio and Wisconsin, harbored in their bile ducts 3 and 8 specimens respectively of a trematode of the genus Platynosomum. These specimens, after comparison with both the original and the recently expanded description by Travassos (1944, …
Studies In Quantitative Paleontology Ii. Multivariate Analysis—A New Analytical Tool For Paleontology And Geology, Benjamin H. Burma
Studies In Quantitative Paleontology Ii. Multivariate Analysis—A New Analytical Tool For Paleontology And Geology, Benjamin H. Burma
Department of Earth and Atmospheric Sciences: Faculty Publications
Multivariate analysis is the simultaneous comparison of three or more variables in order to determine the significance of their likenesses and differences. The technique has been in use for some thirteen years, but no simple account of the method has hitherto been available. An illustrative example from invertebrate paleontology is here used, but the method is applicable to any problem in geology involving several quantitatively known variables.
Separation Of Enzymes On The Filter Paper Chromatopile, Herschel Mitchell, Malcom Gordon, Francis A. Haskins
Separation Of Enzymes On The Filter Paper Chromatopile, Herschel Mitchell, Malcom Gordon, Francis A. Haskins
Department of Agronomy and Horticulture: Faculty Publications
A recent report from this laboratory described a method for isolation of low molecular weight compounds by chromatography on a pile of filter paper disks (1). Preliminary experiments have now been completed on the application of this method to the separation of enzymes. It was expected that a mixture of enzymes could be placed near the top of a filter paper pile and fractionated by imposing a gradient (i.e. pH, organic solvent, or salt concentration) on the column, thus taking advantage of a continuous process. Following the observation of Tiselius (2) it also seemed probable that enzyme separations could be …
Studies In Quantitative Paleontology: I. Some Aspects Of The Theory And Practice Of Quantitative Invertebrate Paleontology, Benjamin H. Burma
Studies In Quantitative Paleontology: I. Some Aspects Of The Theory And Practice Of Quantitative Invertebrate Paleontology, Benjamin H. Burma
Department of Earth and Atmospheric Sciences: Faculty Publications
For some time there has been a noticeable trend toward a more strictly quantitative outlook in paleontology. In view of many special circumstances encountered in dealing with fossil material, there is a rather extended consideration here given to the theoretical background of the quantitative method as applied to fossil invertebrates. First there is a consideration of the relations between sampling theory and paleontology. This is followed by a discussion of variability in populations and the problem of inference from sample to population. A consideration is next given to the species concept and a comparison of the units which can be …