99 research outputs found
Pollman, Henry B.
No full textCentro Asturiano membership record of Henry B. Pollman; Socio Number: 133761.https://digitalcommons.usf.edu/asturiano_membership/4902/thumbnail.jp
Circasemiannual chronomics: half-yearly biospheric changes in their own right and as circannual waveform
No full textGeomagnetic activity has a strong half-yearly but no precise yearly component in its spectrum, as Armin Grafe suggested nearly half a century ago. We have postulated elsewhere that non-photic cycles such as those in geomagnetics may have signatures in the biosphere and vice versa that biological rhythms have likely counterparts in the physical environment. Accordingly, we document phenomena characterized by a prominent about half-yearly variation, re-analyzed to constitute the start of a transdisciplinary chronomic (time structural) map, aligning these conditions with a half-yearly cycle in the geomagnetic index Kp. At least some biospheric phenomena fitted concomitantly with 1– and 0.5–year cosine curves exhibit an amplitude (A) ratio of A0.5–year/A1–year larger than unity. Methodologically, it is pertinent that even if data were read off published graphs, the resulting analyses were practically the same as those in the original data received subsequently. The main point is a circasemiannual pattern in status epilepticus, in several morbid oral conditions, in the cell density of vasopressin-containing neurons in the human suprachiasmatic nuclei (SCN), in circulating melatonin at middle latitudes at night during years of minimal solar activity or around noon at high latitudes, and in an unusual circasemiannual aspect of a birth-month-dependence of human longevity. Others have asked whether annual rhythms in human reproduction are biological, sociological or both. We show some other possibilities herein, involving the physical environment, hardly to be neglected in the case of open systems. As to almost certainly multifactorial circasemiannual rhythms, geomagnetics may also be a signal, a proxy or a putative, at least partial mechanism. Geomagnetic activity is related in its turn to solar and galactic activity, and may be a marker for other cyclic events that affect the biosphere. The similarity of cycle lengths in itself can only be a hint prompting the search for causal relations
Looking back: Flexible but unbreakable
No full textBiographer Tessel Pollmann rescues from oblivion the engineer who for six decades was one of the most influential people in the Netherlands.Delft University of Technolog
A Writer’s Board and a Student-Run Writing Clinic: Making the Writing Community Visible at Law Schools
No full textIn this article the author explains institutional programs she has developed in response to a common problem, students’ frustrations with the limits of a law school’s legal writing program. The author proposes establishing a Writers’ Board, where members of the law school community who care most about legal research and writing training can work together to create opportunities for students to learn more. The Writers’ Board’s primary project is a Writing Clinic that offers diverse ways to improve legal research and writing on campus. Despite problems that are likely to arise when creating a Writers’ Board and Clinic, the author concludes that these projects will not only improve legal research and writing training, but also raise students’ confidence in the writing program and in themselves, and draw positive attention to a law school’s legal writing program
Una aplicación de las funciones Spline de interpolación
No full textSean, un intervalo real [a,b], n nodos t? ,…, tn que verifican a < t? < … < tn< b y una función f continua y definida sobre [a,b], tal que se conocen sus valores en los nodos y que su primera derivada posee una discontinuidad en un punto c ? [a,b] conocido (eventualmente se extiende al caso de un número finito de discontinuidades localizadas en el intervalo)
Una aplicación de las funciones Spline
No full textDada la función f, sobre un intervalo [a,b), definida en los nodos a <t1 < t 2 < …< tn-1 < tn < b y de la cual se sabe que es discontinua su primera derivada en un punto c ? [a,b), se analiza la existencia y unicidad de la Función Spline de Interpolación que aproxima a f en estos nodos y acepta esta condición. Posteriormente se determina un algoritmo de cálculo explícito para la solución encontrada y se agrega un programa computacional que obtiene esta solución
A theoretical study of Band Offset modification at the GaAs/AlAs interface employing Si interlayers
No full textPERFORMANCE AND COMPLEXITY TRADE STUDY OF CANDIDATE LIQUID AIR GENERATION TECHNIQUES
No full textThis paper presents the results of an alternatives analysis of gas-liquefaction methods used in liquid air energy storage (LAES) systems that incorporates two novel measures of performance (MOP) into the analysis: system complexity score and system density. The cryogenic methods typically considered for air, and used in this trade study, include Linde-Hampson, Claude, Heylandt, and cascade. With these four options of air liquefaction currently in use for a variety of purposes with ranging scales, there exists no standard selection process for the air-liquefaction method in LAES. This trade study provides fundamental design solutions for given stakeholder requirements, allowing for a pragmatic analysis of integration for future implementation of LAES systems. The intent of these design solutions is for use in the earliest stage of consideration of a LAES implementation, helping stakeholders quickly narrow the focus of their design engineers to a specific liquefaction process. This will reduce the complexity of integration techniques and processes and streamline LAES into the energy-storage industry. The results of this study showed that with evenly weighted MOP, the Heylandt method had the highest final weighted score (0.9), followed by cascade (0.88), Claude (0.86), and Linde-Hampson (0.67). However, the results showed that the cascade method was the most frequent design solution (8/11) from 11 variations of MOP weight distributions.Approved for public release. Distribution is unlimited.Lieutenant, United States Nav
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