scholarly journals Studies Towards a Method for Radiocalcium Dating of Bones

Radiocarbon ◽  
1989 ◽  
Vol 31 (03) ◽  
pp. 311-323 ◽  
Author(s):  
Walter Kutschera ◽  
Irshad Ahmad ◽  
P J Billquist ◽  
B G Glagola ◽  
Karen Furer ◽  
...  
Keyword(s):  
Half Life ◽  
Beam Intensity ◽  
University Of Pennsylvania ◽  
Current Status ◽  
Production Processes ◽  
The University ◽  
Accelerator System

We made preliminary AMS measurements of 41Ca/Ca ratios in bone and limestone specimens with the Argonne Tandem-Linac Accelerator System (ATLAS). We were able to avoid pre-enrichment of 41Ca used in previous experiments due to a substantial increase in Ca-beam intensity. Most of the measured ratios lie in the 10-14 range, with a few values below 10-14. In general, these values are higher than the ones observed by the AMS group at the University of Pennsylvania. We discuss possible implications of these results. We also present the current status of half-life measurements of 41Ca and discuss 41Ca production processes on earth.

Radiocarbon “Effective” Half-Life for Maya Calendar Correlations

1961 ◽  
Vol 27 (2) ◽  
pp. 229-230 ◽  
Author(s):  
Elizabeth K. Ralph
Keyword(s):  
Half Life ◽  
University Of Pennsylvania ◽  
The University ◽  
Made In

AbstractThe question is frequently asked: How would a change in the half-life of C14 affect the Maya calendar correlations? The optimum “effective” half-life value for this era, as determined by the Pennsylvania measurements of contemporaneous samples of known age, and, as pointed out by Satterthwaite and Ralph (1960), is, by coincidence, very close to the Libby half-life (5568±30 years). Nevertheless, a change in the value of the half-life of C14 would not necessarily change the “effective” half-life, and, on the basis of present data, no change should be made in the University of Pennsylvania dating of the Maya calendar correlation samples.

Production of New and Revised A.A.V.S.O. Charts

1979 ◽  
Vol 46 ◽  
pp. 368
Author(s):  
Clinton B. Ford
Keyword(s):  
Variable Star ◽  
Standard Form ◽  
Original Data ◽  
University Of Pennsylvania ◽  
Standard Format ◽  
Additional Information ◽  
The Gift ◽  
The University

A “new charts program” for the Americal Association of Variable Star Observers was instigated in 1966 via the gift to the Association of the complete variable star observing records, charts, photographs, etc. of the late Prof. Charles P. Olivier of the University of Pennsylvania (USA). Adequate material covering about 60 variables, not previously charted by the AAVSO, was included in this original data, and was suitably charted in reproducible standard format.Since 1966, much additional information has been assembled from other sources, three Catalogs have been issued which list the new or revised charts produced, and which specify how copies of same may be obtained. The latest such Catalog is dated June 1978, and lists 670 different charts covering a total of 611 variables none of which was charted in reproducible standard form previous to 1966.

scholarly journals Equine Discomfort Ethogram

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 580
Author(s):  
Catherine Torcivia ◽  
Sue McDonnell
Keyword(s):  
Pain Management ◽  
Line Drawing ◽  
Clinical Work ◽  
Pain Scale ◽  
University Of Pennsylvania ◽  
Systematic Evaluation ◽  
Clear Understanding ◽  
Physical Discomfort ◽  
Professional Health ◽  
The University

In recent years, there has been a growing interest in and need for a comprehensive ethogram of discomfort behavior of horses, particularly for use in recognizing physical discomfort in domestically managed horses. A clear understanding of the physical discomfort behavior of horses among caretakers, trainers, and professional health care personnel is important to animal welfare and caretaker safety. This is particularly relevant to pain management for hospitalized equine patients. Various pain scale rubrics have been published, typically incorporating only a few classically cited pain behaviors that, in many cases, are specific to a particular body system, anatomic location, or disease condition. A consistent challenge in using these rubrics in practice, and especially in research, is difficulty interpreting behaviors listed in various rubrics. The objective of this equine discomfort ethogram is to describe a relatively comprehensive catalog of behaviors associated with discomfort of various degrees and sources, with the goal of improving understanding and clarity of communication regarding equine discomfort and pain. An inventory of discomfort-related behaviors observed in horses has been compiled over 35 years of equine behavior research and clinical consulting to medical and surgical services at the University of Pennsylvania School of Veterinary Medicine’s equine hospital. This research and clinical work included systematic evaluation of thousands of hours of video-recordings, including many hundreds of normal, healthy horses, as well as hospitalized patients with various complaints and/or known medical, neurologic, or orthopedic conditions. Each of 73 ethogram entries is named, defined, and accompanied by a line drawing illustration. Links to online video recorded examples are provided, illustrating each behavior in one or more hospitalized equine patients. This ethogram, unambiguously describing equine discomfort behaviors, should advance welfare of horses by improving recognition of physical discomfort, whether for pain management of hospitalized horses or in routine husbandry.

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