Matrix Product States, Random Matrix Theory and the Principle of Maximum Entropy

Using random matrix techniques and the theory of Matrix Product States we show that reduced density matrices of quantum spin chains have generically maximum entropy.Comment: 11 pages, 4 figure

Scientific, Technical and Economic Committee for Fisheries (STECF) - Quality aspects of the collection of economic data - methods of calculation of the indicators and sampling strategies SGECA-09-02

The assessment of quality of economic data is a relevant issue that has been raised by several working groups and by different bodies (first of all STECF and RCMs). This issue also affects end users that should be aware of the reliability of data used in the analysis. The new Data Collection Framework establishes the list of economic variables to be collected for the total fleets and for the fleet segments. It also requires Member States to describe the methodologies applied for the data collection and to give information on the quality (accuracy and precision) of estimates. Thus, SGECA 09-02 was asked to give appropriate recommendations and proposals in order to homogenise the presentation of National Programmes and also in order to facilitate the STECF task to evaluate the quality of the data collected by the Member States. Moreover, the Regional Co-ordination Meetings held in 2008 identified several issues within the new DCF requiring further work or clarification. Thus, this report reflects the reviews and discussions on the most frequently applied methodologies to collect economic variables for fleet segments and the common approaches proposed to assess data quality. SGECA reached a consensus on a list of recommendations, that were proposed to STECF for their possible adoption and endorsement. These should allow MS to better comply with the requirements of the DCF in relation to data quality assurance in a more consistent way within an agreed framework as concerns some basic methods and metadata.JRC.DG.G.4-Maritime affair

Scientific, Technical and Economic Committee for Fisheries (STECF) - Report of the Working Group (SGECA 10-01) on the discussion of methodologies, indicators and format of the 2010 Annual Economic Report (AER)

STECF-SGECA 10-01 convened in Copenhagen during the 8-11th of February 2010 to discuss and seek agreement on the content, indicators, methodologies and format of the 2010 Annual Economic Report (AER). The latest (DCF) data call requirements and how they affect the contents of the AER were also clarified. The availability of new economic and transversal variables are for the first time available under the DCF meant there was an opportunity to include new indicators and variables in the report and also modify the existing ones if necessary, implying significant changes to some or all chapters of the report. Therefore, proposals for improved contents and the overall structure were discussed. In addition, the economic policy advice needs related to the AER were specified, so that the information contained in the report could be appropriately designed with the end users in mind.JRC.DG.G.4-Maritime affair

29th Plenary Meeting Report of the Scientific, Technical and Economic Committee for Fisheries (Plen-08-03)

The Scientific, Technical and Economic Committee for Fisheries held its 29th plenary on 3-7 November 2008 in Brussels. The terms of reference included both assessments of STECF working group reports and additional requests submitted to the STECF by the Commission. Topics dealt with ranged from fisheries economics to stock review issues.JRC.G.4-Maritime affair

Hone sludge metal as an alternative partial substitute of sand in concrete

Many metal industries in Iowa and throughout the United States produce a hone sludge, a product of the cutting and polishing metal work process. This sludge is listed by the EPA as a hazardous waste. The disposal of this sludge has become an enormous burden to the manufacturer in terms of time, storage, transportation, and disposal costs. The purpose of this study is to determine the performance characteristics of using hone sludge (byproduct of the metal industry) as a partial substitute of fine aggregate (sand) in concrete. This would reduce the disposal cost of the sludge and reduce hazardous releases to the environment as well. The amount of metal sludge added to the concrete in this study was increased by intervals of 5%, while decreasing the fine aggregate, to a maximum substitution of 15%. Before addition, the hone sludge was dried and granulated to be suitable for the concrete mixture. The material proportions were calculated and the concrete composite produced according to the American Concrete Institute (ACI) standards. Compression, split-tensile, and flexural tests were performed on the concrete samples as prescribed by the American Society for Testing and Materials (ASTM) standards. The results reveal that substituting hone sludge metal for sand produces concrete that has significantly greater compression properties than regular concrete. Furthermore, the experimental samples resulting from the 5% and 15% substitution of metal demonstrated lower split-tensile and flexural strength. However, the differences among the experimental composites and the control samples are not significant. The most ideal proportioning was 10% substitution of sludge that presented a compression strength significantly higher than that of the control samples, and a splitting-tensile strength, modulus of rupture, and modulus of elasticity higher than those of the control samples and those composites consisting of 5% and 15% substitution of sludge

Scientific, Technical and Economic Committee for Fisheries (STECF) - Report of the SGMED-09-03 Working Group on the Mediterranean Part II

SGMED-09-03 meeting was held on 14-18 December 2009 in Barza d¿ Ispra (Italy). The report provides specific stock (by species and GSAs) predictions of stock size, fishing mortality and catches in short term (2009-2011) and medium term (2009-2018) under different management scenarios, for the main demersal and small pelagic Mediterranean stocks. STECF reviewed the report during its Plenary meeting on 26-30 April 2010 in Norwich.JRC.DG.G.4-Maritime affair

Diagnosis and in vitro antidermatophytic sensitivity of the ethanolic extract of Euphorbia tirucall / Diagnóstico e sensibilidade antidermatófita in vitro do extrato etanólico de Euphorbia tirucalli

Dermatophytosis is the most common mycosis, accounting for 5 to 10% of all superficial mycoses. The present study aimed to evaluate the in vitro antifungal activity of the ethanolic extract of Euphorbia tirucalli on clinical isolates of dermatophytes obtained from 2 patients with signs and symptoms consistent with dermatophyte infection. Two dermatophyte etiologic agents, Trichophyton mentagrophytes and T. tonsurans, were isolated from these patients. In vitro antifungal sensitivity showed that the ethanolic extract of E. tirucalli possesses antifungal activity against these strains of interest, with a Minimum Inhibitory Concentration (MIC) of 125 and 250 g/mL, respectively. According to the phytochemical profile of this extract supported by infrared analysis, the antibiotic activity was attributed to the presence of flavonoids and tannins, phytoconstituents generally recognized for their pharmacological potential

Uso del juego libre en sectores en niños de cuatro años, en la Institución Educativa Inicial N° 115-11, San Juan de Lurigancho, 2019

Esta investigación tuvo como objetivo describir el nivel de uso del juego libre en los sectores en el aprendizaje de los niños de cuatro años de la institución educativa inicial N°115-11, San Juan de Lurigancho, 2019. Esta investigación de enfoque cuantitativo, tipo básica, nivel descriptivo simple de diseño no experimental; con una muestra de 30 estudiantes, se utilizó como técnica de la observación y como instrumento la lista de cotejo, Se concluyó respecto al objetivo general, del uso del Juego libre en los sectores en el aprendizaje de los niños de cuatro años de la institución educativa inicial N°115-11, describe que los niños de 4 años se encuentran en un nivel bajo que representa el 10%, en un nivel medio que es el 57.7% y en un nivel alto que corresponde el 10%