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"Holt, K. A"
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Knock out
Told in assonant free verse, Levi was once a premature baby who suffered from respiratory problems; he recovered, and now in seventh grade, he struggles to demonstrate to his divorced mother and overprotective brother that he is okay--so when his father suggests he take up boxing he falls in love with the sport, but he still must find a way to convince his family to set him free to follow his dream.
Book
Principles and methods for automated palynology
Pollen grains are microscopic so their identification and quantification has, for decades, depended upon human observers using light microscopes: a labour‐intensive approach. Modern improvements in computing and imaging hardware and software now bring automation of pollen analyses within reach. In this paper, we provide the first review in over 15 yr of progress towards automation of the part of palynology concerned with counting and classifying pollen, bringing together literature published from a wide spectrum of sources. We consider which attempts offer the most potential for an automated palynology system for universal application across all fields of research concerned with pollen classification and counting. We discuss what is required to make the datasets of these automated systems as acceptable as those produced by human palynologists, and present suggestions for how automation will generate novel approaches to counting and classifying pollen that have hitherto been unthinkable.
Journal Article
From you to me
On the first day of eighth grade Amelia finds a letter that her older sister Clara wrote to herself before she drowned, and it contains a list of the things Clara planned to do in her own eighth grade year--so Amelia, with the help of her best friend Taylor, resolves to complete the list, in the hope that it will bring some closure and ease her still raw emotions.
Book
Large-Scale Liquid Hydrogen Tank Rapid Chill and Fill Testing for the Advanced Shuttle Upper Stage Concept
Cryogenic upper stages in the Space Shuttle program were prohibited primarily due to a safety risk of a 'return to launch site' abort. An upper stage concept addressed this concern by proposing that the stage be launched empty and filled using shuttle external tank residuals after the atmospheric pressure could no longer sustain an explosion. However, only about 5 minutes was allowed for tank fill. Liquid hydrogen testing was conducted within a near-ambient environment using the multipurpose hydrogen test bed 638.5 ft3 (18m3) cylindrical tank with a spray bar mounted longitudinally inside. Although the tank was filled within 5 minutes, chilldown of the tank structure was incomplete, and excessive tank pressures occurred upon vent valve closure. Elevated tank wall temperatures below the liquid level were clearly characteristic of film boiling. The test results have substantial implications for on-orbit cryogen transfer since the formation of a vapor film would be much less inhibited due to the reduced gravity. However, the heavy tank walls could become an asset in normal gravity testing for on-orbit transfer, i.e., if film boiling in a nonflight weight tank can be inhibited in normal gravity, then analytical modeling anchored with the data could be applied to reduced gravity environments with increased confidence.
Report
Redwood and Ponytail
Told in verse in two voices, with a chorus of fellow students, this is a story of two girls, opposites in many ways, who are drawn to each other; Kate appears to be a stereotypical cheerleader with a sleek ponytail and a perfectly polished persona, Tam is tall, athletic and frequently mistaken for a boy, but their deepening friendship inevitably changes and reveals them in ways they did not anticipate.
BOOK
Cryogenic Propellant Storage and Transfer Technology Demonstration: Prephase A Government Point-of-Departure Concept Study
The primary purpose of this study was to define a point-of-departure prephase A mission concept for the cryogenic propellant storage and transfer technology demonstration mission to be conducted by the NASA Office of the Chief Technologist (OCT). The mission concept includes identification of the cryogenic propellant management technologies to be demonstrated, definition of a representative mission timeline, and definition of a viable flight system design concept. The resulting mission concept will serve as a point of departure for evaluating alternative mission concepts and synthesizing the results of industry- defined mission concepts developed under the OCT contracted studies
Report
Brains for lunch : a zombie novel in haiku?!
At a middle school where zombies, blood-sucking chupacabras, and humans never mingle, \"lifer\" Siobhan and Loeb, a zombie who likes to write haiku, share an attraction. Story written entirely in haiku.
Book
Review 2 -- No Title
THE CITY FINANCES--TAX COLLECTOR.--In accordance with a recommendation of the Mayor, the City Council, sometime ago, resolved to have the state of the accounts of the various city office's investigated. The examination was committed to the care of Mr. H. Jackson, assisted by Mr. A. B. Holt. These gentlemen have carefully and laboriously gone...
Book Review
Gnome-a-geddon
\"Buck discovers that the world in his favorite novels is real, and he must intervene in a war between gnomes and trolls\"-- Provided by publisher.
Book
Unexpectedly large charge radii of neutron-rich calcium isotopes
Despite being a complex many-body system, the atomic nucleus exhibits simple structures for certain ‘magic’ numbers of protons and neutrons. The calcium chain in particular is both unique and puzzling: evidence of doubly magic features are known in
40,48
Ca, and recently suggested in two radioactive isotopes,
52,54
Ca. Although many properties of experimentally known calcium isotopes have been successfully described by nuclear theory, it is still a challenge to predict the evolution of their charge radii. Here we present the first measurements of the charge radii of
49,51,52
Ca, obtained from laser spectroscopy experiments at ISOLDE, CERN. The experimental results are complemented by state-of-the-art theoretical calculations. The large and unexpected increase of the size of the neutron-rich calcium isotopes beyond
N
= 28 challenges the doubly magic nature of
52
Ca and opens new intriguing questions on the evolution of nuclear sizes away from stability, which are of importance for our understanding of neutron-rich atomic nuclei.
Doubly magic atomic nuclei — having a magic number of both protons and neutrons — are very stable. Now, experiments revealing unexpectedly large charge radii for a series of Ca isotopes put the doubly magic nature of the
52
Ca nucleus into question.
Journal Article