10,691 research outputs found
Intracavity Dye-Laser Absorption Spectroscopy (IDLAS) for application to planetary molecules
Time-resolved, quasi-continuous wave, intracavity dye-laser absorption spectroscopy is applied to the investigation of absolute absorption coefficients for vibrational-rotational overtone bands of water at visible wavelengths. Emphasis is placed on critical factors affecting detection sensitivity and data analysis. Typical generation-time dependent absorption spectra are given
John M. Allen to Senator James O. Eastland, 27 April 1978
Typed letter signed dated 27 April 1978 from John M. Allen, Vice-President of Readers Digest, to Eastland, re: enclosed tribute to Humphrey. Attached: removal sheet for Readers Digest (May 1978).https://egrove.olemiss.edu/joecorr_e/1003/thumbnail.jp
Multivariate AIM Consumer Demand Model Applied to Dried Fruit, Raisins, and Dried Plums
Abstract: We estimate a semi-nonparametric demand system based on a multivariate version of the Muntz-Szatz series expansion which is called the Asymptotically Ideal Model (AIM). The model is applied to consumer demand for dried fruits, raisins, and dried plums. Results from the first and second order AIM expansions suggest that the second order expansion leads to a more economically consistent model, but the likelihood ratio test indicates the AIM(2) model was not a statistical improvement over the AIM(1) model.demand, consumers, AIM, Demand and Price Analysis,
Identifying features predictive of faculty integrating computation into physics courses
Computation is a central aspect of 21st century physics practice; it is used
to model complicated systems, to simulate impossible experiments, and to
analyze mountains of data. Physics departments and their faculty are
increasingly recognizing the importance of teaching computation to their
students. We recently completed a national survey of faculty in physics
departments to understand the state of computational instruction and the
factors that underlie that instruction. The data collected from the faculty
responding to the survey included a variety of scales, binary questions, and
numerical responses. We then used Random Forest, a supervised learning
technique, to explore the factors that are most predictive of whether a faculty
member decides to include computation in their physics courses. We find that
experience using computation with students in their research, or lack thereof
and various personal beliefs to be most predictive of a faculty member having
experience teaching computation. Interestingly, we find demographic and
departmental factors to be less useful factors in our model. The results of
this study inform future efforts to promote greater integration of computation
into the physics curriculum as well as comment on the current state of
computational instruction across the United States
ELECTROPHORETIC SEPARATION OF MULTIPLE FORMS OF PARTICLE ASSOCIATED ACID PHOSPHATASE
The acid phosphatases of rat liver mitochondrial-lysosomal fractions have been examined by quantitative and electrophoretic means. Disruption of mitochondrial-lysosomal material by freeze-thawing, sonication, or by blendor treatment released approximately 55.0 to 65.0 per cent of the total acid phosphatase activity of the fraction into the unsedimentable phase. Electrophoretic preparations of this material showed a single acid phosphatase-active site. Treatment of mitochondrial-lysosomal fractions with 5.0 per cent Triton X-100 released 98.0 per cent of the total acid phosphatase activity of the fraction into the unsedimentable phase. Electrophoretic preparations of this material showed two major sites of acid phosphatase activity. One of these was identical to that resolved following physical disruption. The other site was characteristically seen only after treatment with Triton X-100. This acid phosphatase was also released by treatment with digitonin but to a lesser extent. Quantitative and electrophoretic examination indicated that both components of acid phosphatase were concentrated in the mitochondrial-lysosomal fraction. Physical separation of the acid phosphatase released by detergent treatment from the acid phosphatase released by physical disruption was achieved. It was concluded that two categories of acid phosphatase may reside in lysosomal particles. These phosphatases differ in the nature of their binding to lysosomal structure as well as in their electrophoretic properties.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72869/1/j.1749-6632.1964.tb14230.x.pd
Foreshock, Main Shock, and Larger Aftershocks of the Borrego Mountain Earthquake
The Borrego Mountain earthquake, magnitude 6.4, occurred
at 02:28:59.1 G.m.t. on April 9, 1968 and has been assigned
a hypocenter at 33Β°11.4' N., 116Β°07.7' W., h=11.1 km. The
focal-mechanism solution indicates right-lateral slip on a fault
striking N. 48Β° W. and dipping 83Β° NE., which is consistent
with the field observations of faulting and the regional tectonic
framework. A single foreshock of magnitude 3.7 preceded the
main shock by one minute, but no other precursory activity has
been identified. During the year following the event, 135 aftershocks
of magnitude 3.0 and greater have been identified and
located, outlining a broad zone of activity centered on but displaced
2-3 km northeast of the 33-km-long surface rupture on
the Coyote Creek fault. Fracturing at depth during the aftershock
period evidently occurred throughout the width of the
San Jacinto fault zone, but initial surface faulting was localized
along the Coyote Creek fault at the zone's southwestern
margin. The area of aftershock activity enlarged progressively
with time, and the region of the original epicenter became relatively
inactive late in the aftershock period, leading to a
doughnut-shaped epicentral distribution of late aftershocks.
Inasmuch as the epicenter of the main shock was roughly midway
along the zone of aftershock activity, the faulting presumably
was bilateral. This kind of faulting is unusual in
California
Property Tax Lids and the Effect on Kansas
Cross sectional time series data in a partial adjustment model examine local government behavior under an aggregate property tax levy limit and under Truth in Taxation in Kansas. Results indicate that the aggregate levy limit would have continued to restrict property tax revenue and spending had it not been replaced.Public Economics,
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