RECENT CHANGES IN THE FEDERAL POLICYMAKING PROCESS

Agricultural and Food Policy,

Identification of Phenols as the Esters of 3,5-Dinitrobenzoic, p-Nitrobenzoic, Benzoic and Acetic Acids

Organic Chemistr

The Ursinus Weekly, April 26, 1965

Ursinus Meistersingers present tour program • Student-Faculty show combines music, humor, satire • Library week: April 25 to May 1 • Campus Chest encouraged by enthusiastic support: One down, one to go • Campus freedom, Sunisru and you • Dr. Helfferich hosts dinner • Invitation • Shakespeare theatre festival • Last chapel May 13th • Editorial: Meistersingers concert; They\u27re all right, Jack; In the name of sweet charity • H.R.C. wages unending war: Greater than 1776 • Toward maturity • Peon or pledge? • Lacrosse team remains undefeated • Baseball team evens log; Beats W. Maryland, Johns Hopkins • Thinclads nip Swarthmore • Softballers open season with win • MSGA candidates speak out: L. Rudnyansky; R. Reed; R. Shaw • U.C. student pioneer corpsman • Ruby sales awards • Greek gleaningshttps://digitalcommons.ursinus.edu/weekly/1247/thumbnail.jp

The Ursinus Weekly, April 19, 1965

1965 Campus Chest drive opens: From Georgia; From Paoli: From Vietnam • New approach to traditional charity drive announced • Rehearsal underway for play • Dr. Zucker guest on Seminar 610 • U.C. buys land • Dr. Pei to speak • Dental education • Editorial: From Dr. Helfferich; Snubbed? • Britain versus the west coast • Transfer fallacy • ACLU objectives • Unusual honeymoon: Ursinus grad tours Russia • UC celebrities return • Track team loses: F&M snaps 20 meet streak • Tennis team crushed by Swarthmore • Baseball team drops two: LaSalle, Delaware defeat Bears • Ursinus leads lacrosse playday • UC lacrosse team clobbers Penn • Freshman featured as vibes player • Greek gleaningshttps://digitalcommons.ursinus.edu/weekly/1246/thumbnail.jp

Wavelet treatment of the intra-chain correlation functions of homopolymers in dilute solutions

Discrete wavelets are applied to parametrization of the intra-chain two-point correlation functions of homopolymers in dilute solutions obtained from Monte Carlo simulation. Several orthogonal and biorthogonal basis sets have been investigated for use in the truncated wavelet approximation. Quality of the approximation has been assessed by calculation of the scaling exponents obtained from des Cloizeaux ansatz for the correlation functions of homopolymers with different connectivities in a good solvent. The resulting exponents are in a better agreement with those from the recent renormalisation group calculations as compared to the data without the wavelet denoising. We also discuss how the wavelet treatment improves the quality of data for correlation functions from simulations of homopolymers at varied solvent conditions and of heteropolymers.Comment: RevTeX, 19 pages, 7 PS figures. Accepted for publication in PR

First Results from the CHARA Array. II. A Description of the Instrument

The CHARA Array is a six 1-m telescope optical/IR interferometric array located on Mount Wilson California, designed and built by the Center for High Angular Resolution Astronomy of Georgia State University. In this paper we describe the main elements of the Array hardware and software control systems as well as the data reduction methods currently being used. Our plans for upgrades in the near future are also described

Mass and Angular Momentum Transfer in the Massive Algol Binary RY Persei

We present an investigation of H-alpha emission line variations observed in the massive Algol binary, RY Per. We give new radial velocity data for the secondary based upon our optical spectra and for the primary based upon high dispersion UV spectra. We present revised orbital elements and an estimate of the primary's projected rotational velocity (which indicates that the primary is rotating 7 times faster than synchronous). We use a Doppler tomography algorithm to reconstruct the individual primary and secondary spectra in the region of H-alpha, and we subtract the latter from each of our observations to obtain profiles of the primary and its disk alone. Our H-alpha observations of RY Per show that the mass gaining primary is surrounded by a persistent but time variable accretion disk. The profile that is observed outside-of-eclipse has weak, double-peaked emission flanking a deep central absorption, and we find that these properties can be reproduced by a disk model that includes the absorption of photospheric light by the band of the disk seen in projection against the face of the star. We developed a new method to reconstruct the disk surface density distribution from the ensemble of H-alpha profiles observed around the orbit, and this method accounts for the effects of disk occultation by the stellar components, the obscuration of the primary by the disk, and flux contributions from optically thick disk elements. The resulting surface density distribution is elongated along the axis joining the stars, in the same way as seen in hydrodynamical simulations of gas flows that strike the mass gainer near trailing edge of the star. This type of gas stream configuration is optimal for the transfer of angular momentum, and we show that rapid rotation is found in other Algols that have passed through a similar stage.Comment: 39 pages, 12 figures, ApJ in press, 2004 June 20 issu

Traces of times past: Representations of temporal intervals in memory

Theories of time perception typically assume that some sort of memory represents time intervals. This memory component is typically underdeveloped in theories of time perception. Following earlier work that suggested that representations of different time intervals contaminate each other (Grondin, 2005; Jazayeri & Shadlen, 2010; Jones & Wearden, 2004), an experiment was conducted in which subjects had to alternate in reproducing two intervals. In two conditions of the experiment, the duration of one of the intervals changed over the experiment, forcing subjects to adjust their representation of that interval, while keeping the other constant. The results show that the adjustment of one interval carried over to the other interval, indicating that subjects were not able to completely separate the two representations. We propose a temporal reference memory that is based on existing memory models (Anderson, 1990). Our model assumes that the representation of an interval is based on a pool of recent experiences. In a series of simulations, we show that our pool model fits the data, while two alternative models that have previously been proposed do not

Mangroves enhance the biomass of coral reef fish communities in the Caribbean

Mangrove forests are one of the world's most threatened tropical ecosystems with global loss exceeding 35% (ref. 1). Juvenile coral reef fish often inhabit mangroves, but the importance of these nurseries to reef fish population dynamics has not been quantified. Indeed, mangroves might be expected to have negligible influence on reef fish communities: juvenile fish can inhabit alternative habitats and fish populations may be regulated by other limiting factors such as larval supply or fishing. Here we show that mangroves are unexpectedly important, serving as an intermediate nursery habitat that may increase the survivorship of young fish. Mangroves in the Caribbean strongly influence the community structure of fish on neighbouring coral reefs. In addition, the biomass of several commercially important species is more than doubled when adult habitat is connected to mangroves. The largest herbivorous fish in the Atlantic, Scarus guacamaia, has a functional dependency on mangroves and has suffered local extinction after mangrove removal. Current rates of mangrove deforestation are likely to have severe deleterious consequences for the ecosystem function, fisheries productivity and resilience of reefs. Conservation efforts should protect connected corridors of mangroves, seagrass beds and coral reefs