A Further Study of the Home Life of the Brown Thrasher

During the summer of 1911, the writer made a detailed study of the nesting habits of the Brown Thrasher which covered a considerable part of the nesting period. The report of this study was published in the Wilson Bulletin. During the summer of 1912 the writer made one full day\u27s observations on a nest of the same species under somewhat different circumstances, such that some additional conclusions are reached regarding the nestling food

Wildlife and Multiple-Use Forestry

THE FACT that a forestry organization is interested in the subject of wildlife management and multiple-use forestry is testimony, if any were needed, to the advanced thinking that has developed since the time when forest and forestry management were widely regarded as important solely for the production of saw logs. It is indicative of dearer understanding of the basic interrelationships that exist in managing natural resources

Wildlife: Past and Present

In assessing the wildlife situation, particularly in the eastern United States, my mind inevitably goes back to conditions that existed between 1910 and l915 when I first became interested in wildlife matters. At that time, there was no professional wildlife management, and the administration of the wildlife resources was almost entirely in the hands of politicians who used wildlife funds and positions for politica1 patronage purposes. Few states employed career men, and the U. S. Biological Survey was a small research agency with an appropriation of a few thousand dollars a year

A List of the Birds Found in Marshall County, Iowa

During a three years\u27 residence at Marshalltown, Marshall County, Iowa, ending September 15, 1915, the writer spent most of his spare time in a study of the avifauna of the region. Nearly all parts of the county were visited, the area within which most of the work was done being indicated on the accompanying map

A List of the Birds Observed in Clay and O\u27Brien Counties, Iowa

Clay and O\u27Brien counties lie in a section of Iowa which have received little attention from ornithologists. O’Brien is the more westerly; it is the second from the western boundary of the state, with Clay County adjoining it on the east; and each lies within one county of the Minnesota state line

Notes on the Mammals Observed in Marshall County, Iowa

Few specific locality records for mammals in central Iowa have ever been published. The following brief notes, therefore, have been prepared for the purpose of making available for future workers on Iowan mammalogy the information I am able to give. This list is not complete but comprises only such notes and specimens as came to my hands in one way or another during three years\u27 residence

The Birds of Marshall County, Iowa, II

The continuation of a survey of the birds of Marshall County, Iowa

New insights in the systematics of Peyssonnelia and the Peyssonneliaceae (Rhodophyta), with emphasis on taxa from the Gulf of Mexico and Panama

ABSTRACT: "Peyssonnelia Decaisne comprises a worldwide group of non-calcified or calcified, crust-forming red algae of great ecological significance, with some species involved in the establishment of rhodoliths. Of the eight genera currently recognized in the family, Peyssonnelia, is widely viewed to contain the largest number of species. The number of distinct species of Peyssonneliaceae present in the Gulf of Mexico has increased from 6 to 21. Comparative morphology, chloroplast-encoded rbcL and nuclear LSU rDNA sequence data suggest that species of Peyssonnelia do not occur in the Gulf of Mexico, and that previously reported Peyssonnelia species for the region actually belong to other genera of the Peyssonneliales." (a) University of Louisiana at Lafayette (b) Smithsonian Institution (c) University of North Carolinainfo:eu-repo/semantics/publishedVersio

An all silicon quantum computer

A solid-state implementation of a quantum computer composed entirely of silicon is proposed. Qubits are Si-29 nuclear spins arranged as chains in a Si-28 (spin-0) matrix with Larmor frequencies separated by a large magnetic field gradient. No impurity dopants or electrical contacts are needed. Initialization is accomplished by optical pumping, algorithmic cooling, and pseudo-pure state techniques. Magnetic resonance force microscopy is used for readout. This proposal takes advantage of many of the successful aspects of solution NMR quantum computation, including ensemble measurement, RF control, and long decoherence times, but it allows for more qubits and improved initialization.Comment: ReVTeX 4, 5 pages, 2 figure