High-speed polynomial basis multipliers over GF(2(m)) for special pentanomial.

Efficient hardware implementations of arithmetic operations in the Galois field are highly desirable for several applications, such as coding theory, computer algebra and cryptography. Among these operations, multiplication is of special interest because it is considered the most important building block. Therefore, high-speed algorithms and hardware architectures for computing multiplication are highly required. In this paper, bit-parallel polynomial basis multipliers over the binary field GF(2(m)) generated using type II irreducible pentanomials are considered. The multiplier here presented has the lowest time complexity known to date for similar multipliers based on this type of irreducible pentanomials.

Uso ornamental tradicional de la ‘Blanca de l’hivern’ (Iberis semperflorens L.) en la comarca del Matarraña (Teruel)

Se presentan varias citas del carraspique leñoso localmente denominado ‘Blanca de l’hivern’ (Iberis semperflorens L.), que no había sido citado expresamente en localidades españolas. Se encuentra principalmente distribuido en el 80% de las poblaciones del Matarraña aragonés, como una importante planta cultivada en macetas de floración invernal. Se ha constatado el cuidado y formas de multiplicación tradicionales, así como el valor de las plantas con más años, que son transferidas como un tesoro entre distintas generaciones de mujeres.

Evaluation of the pathogenicity of multiple isolates of Beauveria bassiana (Hypocreales: Clavicipitaceae) on Rhynchophorus ferrugineus (Coleoptera: Dryophthoridae) for the assessment of a solid formulation under simulated field conditions

A solid state formulation of Beauveria bassiana (Balsamo) Vuillemin has been developed for biological control of the Red Palm Weevil (RPW), Rhynchophorus ferrugineus (Olivier, 1790). Two kinds of bioassays (dry conidia and dipping) using 10 isolates from several coleopterans in Mediterranean environments, identified 2 RPW derived isolates (193 and 203) as most pathogenic to RPW larvae and adults (zero survival within first 4–5 d for dry conidia, and 14 and 23 d for dipping bioassays). Isolate 203 (5.1 × 108 ± 1.9 × 108 conidia g-1) was formulated with fragmented date seed into solid granules and tested in palms infested with RPW under semi-field conditions in Feb, Apr/May and Jun of both 2007 and 2008. Beauveria bassiana significantly reduced RPW adult survival with respect to controls in May 2007 and in the Apr/Jun 2008 experiments. Total RPW adult mortality was achieved within 30 days for all B. bassiana treatments, and was associated with increasing numbers of insects with signs of mycosis in 2008 experiments. Beauveria bassiana formulation reduced RPW multiplication in artificially infested palms compared to controls, and a positive correlation between numbers of larvae and time post-infestation was recorded. The suppression of RPW adult populations by B. bassiana persisted for at least 3 months under semi-field conditions. The Beauveria bassiana solid formulation, which induces great adult mortality and persistence in the field, could be applied as a preventive as well as a curative treatment for the integrated management of RPW.

Partial Product Reduction based on Look-Up Tables

In this paper a new technique for partial product reduction based on the use of look-up tables for efficient processing is presented. We describe how to construct counter devices with pre-calculated data and their subsequent integration into the whole operation. The development of reduction trees organizations for this kind of devices uses the inherent integration benefits of computer memories and offers an alternative implementation to classic operation methods. Therefore, in our experiments we compare our implementation model with CMOS technology model in homogeneous terms.

Presencia del olmo temblón o negrillo, Ulmus laevis Pall. en Ibi (Alicante, Comunidad Valenciana)

Se ha localizado en la Rambla de la Gavarnera en Ibi, Alicante una pequeña población de Ulmus laevis Pall., que no había sido citado expresamente en localidades valencianas, ni en las floras locales, regionales, ni nacionales, en unos casos por no haberse localizado, en otros por considerar a este árbol alóctono en España. Desde hace una década un equipo de la ETSIA de Montes de la Universidad Politécnica de Madrid, viene realizando diversos proyectos y tesis doctorales que han dado como resultado la puesta en valor de esta especie, a través de su localización a nivel nacional, estudio ecológico, fisiológico y genético, que arrojan numerosas pruebas a favor de la autoctonía de esta especie en España. Según los autores de este dilatado proyecto, U. laevis habría tenido en España uno de su principales refugios cuaternarios, aunque en la actualidad se encuentre fragmentado en poblaciones dispersas, con pocos individuos y problemas para su conservación y supervivencia. No obstante esta especie ha demostrado mayores tasas de supervivencia a la enfermedad de los olmos, que otros de sus congéneres como Ulmus minor y U. glabra. En cuanto a su presencia en Alicante, son precisamente estos autores los que localizan un primer ejemplar en Ibi, al que ahora añadimos dos ejemplares más repartidos en tres puntos muy próximos y situados a lo largo de la Rambla de la Gavarnera. Este es un cauce irregular pero con nivel freático permanente, como lo atestiguan la existencia de pozos, azudes, albercas que abastecieron a los pequeños regadíos de la zona, muchos de ellos abandonados en la actualidad. Dada la rareza de esta especie a nivel nacional y la excepcionalidad de su presencia en Ibi, consideramos que el ejemplar de mayor porte merece la consideración de árbol singular para la Comunidad Valenciana y por otra parte, los otros ejemplares merecen su protección y multiplicación, para incrementar la población existente. Es necesario desarrollar un mayor esfuerzo de localización en este paraje y zonas próximas de la Comarca, para conocer su potencial distribución en la provincia y determinar un estatus de protección adecuado.

Notebook on logarithms, ca. 1714-1718, 1747

This notebook is missing at least one page, as it begins in the midst of a problem. It contains extensive notes on logarithms and various related examples, problems, and calculations. Prince made notes on the addition, subtraction, multiplication, and division of logarithms, as well as some notes on navigation. The last two pages of this notebook contain a draft of a letter from Prince to an unnamed gentleman in London, thanking him for his financial support. This is believed to have been written in June 1747, when Prince arrived in Portsmouth, England "without one six pence in [his] pocket & without Hat, Coat, Breeches, Shirts, Stockings or shoes fit to come up to London with." In the letter, he thanks this donor for his support and describes in detail his situation and the challenges facing him in leaving the Navy and beginning missionary work. He refers several times to Dr. Philip Bearcroft, the Secretary of the Society for the Propagation of the Gospel, who was responsible for his approval as a Missionary to the Moskito tribe.

Assessing stool quantities generated by three specific Kato-Katz thick smear templates employed in different settings.

BACKGROUND The Kato-Katz technique is recommended for the diagnosis of helminth infections in epidemiological surveys, drug efficacy studies and monitoring of control interventions. We assessed the comparability of the average amount of faeces generated by three Kato-Katz templates included in test kits from two different providers. METHODS Nine hundred Kato-Katz thick smear preparations were done; 300 per kit. Empty slides, slides plus Kato-Katz template filled with stool and slides plus stool after careful removal of the template were weighed to the nearest 0.1 mg. The average amount of stool that was generated on the slide was calculated for each template, stratified by standard categories of stool consistency (i.e. mushy, soft, sausage-shaped, hard and clumpy). RESULTS The average amount of stool generated on slides was 40.7 mg (95 % confidence interval (CI): 40.0-41.4 mg), 40.3 mg (95 % CI: 39.7-40.9 mg) and 42.8 mg (95 % CI: 42.2-43.3 mg) for the standard Vestergaard Frandsen template, and two different templates from the Chinese Center for Disease Control and Prevention (China CDC), respectively. Mushy stool resulted in considerably lower average weights when the Vestergaard Frandsen (37.0 mg; 95 % CI: 34.9-39.0 mg) or new China CDC templates (37.4 mg; 95 % CI: 35.9-38.9 mg) were used, compared to the old China CDC template (42.2 mg; 95 % CI: 40.7-43.7 mg) and compared to other stool consistency categories. CONCLUSION The average amount of stool generated by three specific Kato-Katz templates was similar (40.3-42.8 mg). Since the multiplication factor is somewhat arbitrary and small changes only have little effect on infection intensity categories, it is suggested that the standard multiplication factor of 24 should be kept for the calculation of eggs per gram of faeces for all investigated templates.

The correspondence between methods of digital division and multiplier recording procedures,

Bibliography: p. 31.

Rechentafel, enthaltend das grosse einmaleins bis 999 mal 999 mit einer einrichtung, die es ermöglicht, jedes gesuchte resultat, sowohl für die multiplikation, als auch für die division, biltzschnell zu finden, nebst einer kreisberechnungstabelle,

D.R.G.M. no. 68744.

Plexiglas reflected assemblies of plutonium /

This report contains a compilation of critical extrapolations of subcritical neutron multiplication measurements made on assemblies of plutonium metal tamped with Plexiglas.

Rechentafeln welche alles Multiplizieren und Dividieren mith Zahlen unter tausend ganz Ersparen ...

Mode of access: Internet.

Table of the first ten powers of the integers from 1 to 1000 ... December 1, 1938.

"Prepared by the 'Project for the computation of mathematical tables' sponsored by Dr. Lyman J. Briggs, director of the National bureau of standards, Washington, D.C., and under the auspices of the U.S. Works progress administration of New York city."--Pref.

Méthodes nouvelles et faciles de calculer les progressions génératrices pour former les pulssances et extraire leurs racines, de multiplier et de diviser.

Mode of access: Internet.

The ready multiplier /

Mode of access: Internet.

Dr. A. L. Crelle's Rechentalfeln : welche alles multiplizieren und dividieren mit Zahlen unter tausend ganz ersparen, bei grösseren Zahlen aber die Rechnung erleichtern und sicherer machen.

Mode of access: Internet.