Quantum fields and "Big Rip" expansion singularities

The effects of quantized conformally invariant massless fields on the evolution of cosmological models containing a ``Big Rip'' future expansion singularity are examined. Quantized scalar, spinor, and vector fields are found to strengthen the accelerating expansion of such models as they approach the expansion singularity.Comment: 7 pages; REVTeX

Blacks in Appalachia

Although southern Appalachia is popularly seen as a purely white enclave, blacks have lived in the region from early times. Some hollows and coal camps are in fact almost exclusively black settlements. The selected readings in this new book offer the first comprehensive presentation of the black experience in Appalachia. Organized topically, the selections deal with the early history of blacks in the region, with studies of the black communities, with relations between blacks and whites, with blacks in coal mining, and with political issues. Also included are a section on oral accounts of black experiences and an analysis of black Appalachian demography. The contributors range from Carter Woodson and W. E. B. Du Bois to more recent scholars such as Theda Perdue and David A. Corbin. An introduction by the editors provides an overall context for the selections. Blacks in Appalachia focuses needed attention on a neglected area of Appalachian studies. It will be a valuable resource for students of Appalachia and of black history. William H. Turner is dean of the College of Arts and Sciences at Kentucky State University. Edward J. Cabbell is director of the John Henry Memorial Foundation in West Virginia.https://uknowledge.uky.edu/upk_appalachian_studies/1006/thumbnail.jp

A representation of the natural numbers by means of cycle-numbers, with consequences in number theory

In this paper we give rules for creating a number triangle T in a manner analogous to that for producing Pascal’s arithmetic triangle; but all of its elements belong to {0, 1}, and cycling of its rows is involved in the creation. The method of construction of any one row of T from its preceding rows will be defined, and that, together with starting and boundary conditions, will suffice to define the whole triangle, by sequential continuation. We shall use this triangle in order to define the so-called cycle-numbers, which can be mapped to the natural numbers. T will be called the ‘cyclenumber triangle’. First we shall give some theorems about relationships between the cyclenumbers and the natural numbers, and discuss the cycling of patterns within the triangle’s rows and diagonals. We then begin a study of figures (i.e. (0,1)patterns, found on lines, triangles and squares, etc.) within T. In particular, we shall seek relationships which tell us something about the prime numbers. For our later studies, we turn the triangle onto its side and work with a doubly-infinite matrix C. We shall find that a great deal of cycling of figures occurs within T and C, and we exploit this fact whenever we can. The phenomenon of cycling patterns leads us to muse upon a ‘music of the integers’, indeed a ‘symphony of the integers’, being played out on the cycle-number triangle or on C. Like Pythagoras and his ‘music of the spheres’, we may well be the only persons capable of hearing it! Keywords: cycle-number triangle, cycle-number, prime cycle-number

The Ursinus Weekly, November 9, 1942

Bears feast on dragon meat in 19-13 dads\u27 day victory • Nelson pleads for dynamic religion at Y conference • Old timers\u27 dance to feature music by Damon Holton • Cooke chosen for senior play lead • Girls asked to give hand in making war bandages • Mass meeting addressed by Chinese YWCA worker • Lt. Disert to tell Wednesday forum about the WAVES • Rogalinski named president • Bayne tells Chem Society of polarographic function • Pearson to tell pre-meds of their status in the war • French Club to hear Dunant • Dr. White attends conclave • Freshman prexy finds sanctuary in near-by house of detention • Bears beat Drexel Dragons 19-13 • Paul Detwiler and Bill Fetch star as bruins click for three periods and then come from behind to win • Football takes over during fourth week of intra activities • Soccermen to play Lafayette, alumni • Girls\u27 hockey team rallies in second half to tie Beaver 2-2 • Redskins-Packers and Giants-Bears meet this week • Lack of student support holds up tennis tourney • Bucknell noses out G\u27burghttps://digitalcommons.ursinus.edu/weekly/1744/thumbnail.jp

Treatment of estrogen-induced dermatitis with omalizumab

In 1945, Drs Bernhard Zondek and Yehuda Bromberg demonstrated intradermal treatment with estrone and estradiol benzoate induced urticarial lesions in some patients.1 Fifty years later, Shelley et al,2 who introduced the concept of progesterone dermatitis several decades prior, defined estrogen dermatitis based on studies of 7 women with premenstrual flares of skin eruptions including papulovesicular, urticarial, or eczematous lesions or generalized pruritus. Previously described therapies for estrogen dermatitis include estrogen desensitization, tamoxifen, leuprolide, and oophorectomy.3 Here we report a case of estrogen-induced dermatitis successfully treated with omalizumab

The Ursinus Weekly, January 11, 1943

How to find God is Koch\u27s subject at Y\u27s installation • College Who\u27s Who lists ten seniors in current edition • Forty will graduate on January 25 in first mid-year commencement • Weekly board fills editorial positions as nine graduate • Anders pre-med society to hear illustrated talk by noted dermatologist • Band pleases some in inter-frat ball • Biology Department receives microscope from Dr. Price • Men debaters open season • Ursinus queen\u27s coronation will replace May pageant • Clamer girls campused • First Ursinus casualty revealed by the Navy • English Club hears Dunant tell of Franco-Nazi hate • High schools to graduate pre-collegians in 3 1/2 years • Much feted freshman pledges flip the coin and cast the die • Coed wanted to fill post as Lantern manager • Curtain Club tryouts set for Wednesday • Blues in the night altered for duration • Wagner explains photos in color at chem meeting • Government seeks woman engineers • Lloyd M. Lebegern dies • Girls open season with Albright sextet at home this week • Jayvees begin practice under coach Hogeland • Rangers and snipers each win twice to take intramural basketball lead • Dribblers get new schedule • Former student gets a 109 • Heiges attends conventionhttps://digitalcommons.ursinus.edu/weekly/1750/thumbnail.jp

Comparison of Continuous Records of Near-Bottom Dissolved Oxygen from the Hypoxia Zone along the Louisiana Coast

Oxygen depletion is a seasonally dominant feature of the lower water column on the highly-stratified, riverine-influenced continental shelf of Louisiana. The areal extent of hypoxia (bottom waters ≤2 mg l−1 dissolved oxygen) in mid-summer may encompass up to 9,500 km2, from the Mississippi River delta to the upper Texas coast, with the spatial configuration of the zone varying interannually. We placed two continuously recording oxygen meters (Endeco 1184) within 1 m of the seabed in 20-m water depth at two locations 77 km apart where we previously documented midsummer bottom water hypoxia. The oxygen meters recorded considerably different oxygen conditions for a 4-mo deployment from mid-June through mid-October. At the station off Terrebonne Bay (C6A), bottom waters were severely depleted in dissolved oxygen and often anoxic for most of the record from mid-June through mid-August, and there were no strong diurnal or diel patterns. At the station 77 km to the east and closer to the Mississippi River delta (WD32E), hypoxia occurred for only 50% of the record, and there was a strong diurnal pattern in the oxygen time-series data. There was no statistically significant coherence between the oxygen time-series at the two stations. Coherence of the oxygen records with wind records was weak. The dominant coherence identified was between the diurnal peaks in the WD32E oxygen record and the bottom pressure record from a gauge located at the mouth of Terrebonne Bay, suggesting that the dissolved oxygen signal at WD32E was due principally to advection by tidal currents. Although the oxygen time-series were considerably different, they were consistent with the physical and biological processes that affect hypoxia on the Louisiana shelf. Differences in the time-series were most intimately tied to the topographic cross-shelf gradients in the two locations, that is, station C6A off Terrebonne Bay was in the middle of a broad, gradually sloping shelf and station WD32E in the Mississippi River Delta Bight was in an area with a steeper cross-shelf depth gradient and likely situated near the edge of a hypoxic water mass that was tidally advected across the study site

An Empirical Evaluation of Statistical Matching Methodologies

Using known data, the methodologies available for microdata file merging are compared. Results indicate that various techniques work or do not work in specific circumstances. An optimal-constrined merge model with an absolute difference distance function provide the best results