Time (in)dependence in general relativity

We clarify the conditions for Birkhoff's theorem, that is, time-independence in general relativity. We work primarily at the linearized level where guidance from electrodynamics is particularly useful. As a bonus, we also derive the equivalence principle. The basic time-independent solutions due to Schwarzschild and Kerr provide concrete illustrations of the theorem. Only familiarity with Maxwell's equations and tensor analysis is required.Comment: Revised version of originally titled "Kinder Kerr", to appear in American Journal of Physic

Crocodylus acutus

Number of Pages: 17Integrative BiologyGeological Science

A swarm of bees in May

Citation: Kinman, Charles Franklin. A swarm of bees in May. Senior thesis, Kansas State Agricultural College, 1904.Morse Department of Special CollectionsIntroduction: In its characteristics the Italian bee as we find it today is not different from that found over two thousand years ago, by Spinola, in a part of Italy called Liguria. No doubt bees of this variety existed in that country long before they were reported, for at that time they had assumed a disposition and habits that could be established only by unchanging surroundings, such as a particular food, protection against enemies, and isolation from other varieties of bees which would cause their characteristics to vary. The variety was well established through the isolation, as the seas and the snow covered mountains which completly surround Italy made it impossible for other insects to enter this territory. There are many varieties of apidae. However we will not consider any except the Ligurian or Italian bee, as it is known, since it is far more numerous and important economically than any other variety of bees and the complete exclusion of other varieties by them is only a matter of time. While there is nothing but what is interesting and instructing about the work of the Italian bee, we will confine ourself as near as possible to their work of a single month, May

Greer, Charles

HQ. 13th Bnhttps://dh.howard.edu/prom_members/1033/thumbnail.jp

Effects of 3, 5, 6-Trichloro-2-Pyridinol on Thyroid Function

3,5,6-trichloro-2-pyridinol, when administered in the diet, increases the feed efficiency (the ratio of weight gain to feed consumed) in various species of domestic animals and also appears to be retained in the liver at low concentrations, possibly by binding to a specific macromolecule. Because of its structural similarities to the outer ring of the thyroid hormones, trichloropyridinol and three structural analogs (2,4,5-trichlorophenol, 4-bromo-2,5- dichlorophenol, or 4-i odo-2,5-dichlorophenol) were tested for ability to compete in vitro with 3, 5, 3\u27 -triiodothyronine (T ) for nuclear recept ors specific for the thyroid hor- 3 manes . All four of the halogenated compounds were found to be weakly competitive for the receptor, indicating a passible anti-thyroid effect. Weanling male rats were fed diets containing 5, 50, and 500 ppm trichloropyridinol for 30, 60, and 90 days. Other groups received a diet containing 200 and 2000 ppm 2-thiouracil, a known thyroid toxicant. Both chemicals significantly reduced serum thyroxine (T4) levels in a dose-related manner. It was of interest that trichloropyridinol was about as levels. potent Serum T3 as thiouracil in suppressing serum T 4 and 3,3\u275\u27-triiodothyronine (rT3) levels were depressed by thiouracil, but generally not with trichloropyridinol. Nuclear T binding capacity was not 3 changed in the liver of rats ingesting trichloropyridinol. Body weight, feed efficiency, and organ weights and histology were not significantly altered by the chronic ingestion of trichl oropyridinol. In conclusion, the effects trichloropyridinol upon animal growth and feed efficiency may involve various mechanisms surrounding thyroid hormone expression including reduction of serum T4 levels and competition with T3 for the nuclear receptor

FIRST FARMERS IN MAINLAND SOUTHEAST ASIA

The domestication of rice and millet took in the Yangtze and Yellow River valleys. It is argued that the expansion of farming communities from these two regions reached mainland Southeast Asia from the late third millennium BC. The conjunction of new archaeological and bioanthropogical information, and the re-examination of older reports, is beginning to illuminate the interactions between the incoming farmers and long-established hunter gatherers. It is argued that there were several distinct expansionary routes. One followed the coast of Vietnam, others involved the courses of the Salween and Mekong rivers.This brought incoming farmers to a wide range of new habitats. Khok Phanom Di is a key site. Formerly located on the estuary of the Bang Pakong River, a new analysis of cranial and dental variables relate the inhabitants to expansionary farmers. Their adaptation to a marine estuarine habitat, however, made rice cultivation marginal at best, and the new settlers turned to hunting and gathering while maintaining a fully Neolithic material culture.

Real Property Depreciation Recapture: An Ineffectual Reform of the Tax Laws

This note stems from a belief that an asymmetrical body of tax laws is a challenge to the legal profession which, by training, experience and tradition, is well situated to spur and guide reform. It is my intention to outline the story of but one section of the Internal Revenue Code: why it was proposed, what it sought to do, how it underwent modification by an unsympathetic congressional committee, and how it was finally enacted as a superficial compromise with the underlying asymmetry of our tax laws. In short, what follows is an appended bar in the organ theme entitled A Requiem in Honor of the Departing Uniformity of the Tax Laws. \u27 In short, what follows is an appended bar in the organ theme entitled A Requiem in Honor of the Departing Uniformity of the Tax Laws. \u2

Function of the College in the Community

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