Generalization of the matrix product ansatz for integrable chains

We present a general formulation of the matrix product ansatz for exactly integrable chains on periodic lattices. This new formulation extends the matrix product ansatz present on our previous articles (F. C. Alcaraz and M. J. Lazo J. Phys. A: Math. Gen. 37 (2004) L1-L7 and J. Phys. A: Math. Gen. 37 (2004) 4149-4182.)Comment: 5 pages. to appear in J. Phys. A: Math. Ge

Effect of different micro-algae mixtures and rations in hatchery broodstock conditioning of the mussel Mytilus galloprovincialis.

Reproduction of the blue mussel Mytilus galloprovincialis in wild populations follows seasonal changes of environmental factors such as food availability.The aim of this experiment was to analyse the effects of three conditioning diets on the maturation and development of M. galloprovincialis. We experimented three different algae-based treatments: two Non-Tetraselmis (NT) groups and one Tetraselmis (TS) group. Those in the NT groups received a mixture of Isochrysis galbana (clon T-Iso) and Chaetoceros sp. (1:1, based on cell volume). Those in the TS group received Isochrysis sp. (T-Iso), Chaetoceros sp., and Tetraselmis suecica (1:1:1, based on cell volume). Mussels in the NT-1, NT-2 and TS groups received, respectively, 1%, 2% and 2% of the mussels dry weight (MDW) based in algae dry weight (ADW) a day. After 2 months of conditioning, significant changes between wild mussels and the NT-1 group were not detected either in condition index (CI) value or in gonad stadia percentages. On the opposite, after conditioning CI values of mussels having received 2 % ration were higher than those of wild populations and NT-1 group, and ripe female percentage was higher in the TS group than in the NT-2 group. As a conclusion, this study demonstrates that for M. galloprovincialis conditioning, 1% of the MDW in ADW is not enough, and that a varied diet is more suitable.This work was supported by Interreg Project 0251_ECOAQUA_5_E, financed by the EDRF (European Regional Development Fund). www.juntadeandalucia.es/agriculturaypesca/ifapa/ecoaqua.La reproducci&oacute;n del mejill&oacute;n Mytilus galloprovincialis en las poblaciones naturales sigue los cambios estacionales de factores ambientales como la disponibilidad de comida. El objetivo de este experimento fue analizar los efectos de tres dietas de acondicionamiento en la maduraci&oacute;n y el desarrollo de M. galloprovincialis. Para ello, se experimentaron tres tratamientos diferentes a base de microalgas: dos grupos sin la microalga Tetraselmis suecica (NT) y un tercero con esta microalga (TS). Los mejillones de los grupos NT recibieron una mezcla de Isochrysis galbana (clon T-Iso) y Chaetoceros sp. (1:1, basado en el volumen celular). Los del grupo de TS recibido I. galbana (clon T-Iso), Chaetoceros sp., y T. suecica (1:1:1, basado en el volumen celular). Los ejemplares de los grupos NT-1, NT-2 y TS recibieron, respectivamente, 1%, 2% y 2% del peso seco de la masa corporal (PSM) basado en el peso seco del fitoplancton (PSF) al d&iacute;a. Despu&eacute;s de 2 meses de acondicionamiento no se detectaron diferencias significativas en el valor del &iacute;ndice de condici&oacute;n (IC) ni en los porcentajes de estadios de madurez gonadal entre los mejillones del medio natural y el grupo NT-1. Sin embargo, despu&eacute;s del acondicionamiento valores del IC de los mejillones que recibieron el 2% de raci&oacute;n fueron superiores a los de las poblaciones del medio natural y el grupo NT-1. Adem&aacute;s, el porcentaje de hembras maduras fue mayor en el grupo TS que en el grupo NT-2. Como conclusi&oacute;n, este estudio demuestra que para el acondicionamiento de M. galloprovincialis un 1% de la PSM en PSF no es suficiente, y que una dieta variada es m&aacute;s adecuada.Este trabajo fue apoyado por el proyecto Interreg 0251_ECOAQUA_5_E , financiado por el FEDER (Fondo Europeo de Desarrollo Regional). www.juntadeandalucia.es / agriculturaypesca / IFAPA / ecoaqua. &nbsp;</p

Asymmetric exclusion model with several kinds of impurities

We formulate a new integrable asymmetric exclusion process with $N-1=0,1,2,...$ kinds of impurities and with hierarchically ordered dynamics. The model we proposed displays the full spectrum of the simple asymmetric exclusion model plus new levels. The first excited state belongs to these new levels and displays unusual scaling exponents. We conjecture that, while the simple asymmetric exclusion process without impurities belongs to the KPZ universality class with dynamical exponent 3/2, our model has a scaling exponent $3/2+N-1$. In order to check the conjecture, we solve numerically the Bethe equation with N=3 and N=4 for the totally asymmetric diffusion and found the dynamical exponents 7/2 and 9/2 in these cases.Comment: to appear in JSTA

High-speed noise-free optical quantum memory

Quantum networks promise to revolutionise computing, simulation, and communication. Light is the ideal information carrier for quantum networks, as its properties are not degraded by noise in ambient conditions, and it can support large bandwidths enabling fast operations and a large information capacity. Quantum memories, devices that store, manipulate, and release on demand quantum light, have been identified as critical components of photonic quantum networks, because they facilitate scalability. However, any noise introduced by the memory can render the device classical by destroying the quantum character of the light. Here we introduce an intrinsically noise-free memory protocol based on two-photon off-resonant cascaded absorption (ORCA). We consequently demonstrate for the first time successful storage of GHz-bandwidth heralded single photons in a warm atomic vapour with no added noise; confirmed by the unaltered photon statistics upon recall. Our ORCA memory platform meets the stringent noise-requirements for quantum memories whilst offering technical simplicity and high-speed operation, and therefore is immediately applicable to low-latency quantum networks

High temperature acclimation and termotolerance (TL50) in 6 varieties of Chenopodium quinua*

Se estudió la capacidad de aclimatación de 6 variedades de Chenopodium quinoa Willd. (Kancolla, Salcedo, Ccoito, Negra collana, Pasancalla e Illpa) a alta temperatura. Las plantas de quinua se obtuvieron a partir de semillas, las que crecieron en macetas, en un sombreadero, hasta el estado fenológico de 6 hojas verdaderas. Estas fueron expuestas a un tratamiento por calor en una cámara de crecimiento con termostato a 34/32 °C día/noche (D/N) por 3 días y a baja intensidad luminosa. Las no aclimatadas crecieron en las mismas condiciones pero a la temperatura de 22/20 °C D/N. La tolerancia a la alta temperatura se determinó exponiendo discos de hojas a diferentes tiempos (8, 16, 32 y 64 min) a 50 °C (baño maría), midiendo la termoestabilidad de la membrana celular, por la pérdida electrolitos utilizando un conductimetro. El grado de termotolerancia fue hallado según el TL50 (tiempo letal al 50% de daño). Los resultados muestran que las variedades Pasancalla e Illpa presentaron capacidad de aclimatación, la variedad más termotolerante fue la variedad Illpa TL50= 64 min cuando fue aclimatada y la más sensible fue la variedad Pasancalla TL50= 8 min cuando no fue aclimatada. También se observó que el porcentaje de daño celular se incrementó a medida que el tiempo de exposición a la alta temperatura fue mayor.The capacity of acclimatization at high temperature of 6 varieties (Kancolla, Salcedo, Ccoito, Negra collana, Pasancalla and Illpa) of Chenopodium quinoa Willd was studied. Quinoa plants were obtained from seeds, which grew in pots, in a grennhouse, until the phenological stage of 6 true leaves. These were exposed to a heat treatment in a growth chamber with a thermostat at 34/32 °C day/night (D/N) for 3 days and at low light intensity. The non-acclimated plants grew under the same conditions but at temperature of 22/20 °C D/N. The tolerance to high temperature was determined by exposing leaf discs at different times (8, 16, 32 and 64 min) at 50 °C (warm bath), measuring the thermostability of the cell membrane trough the loss of electrolytes with a conductimeter. The degree of thermotolerance was found according to the TL50 (time lethal to 50% of damage). The results showed that the varieties Pasancalla and Illpa presented acclimatization capacity, the most thermotolerant variety was the variety Illpa TL50 = 64 min when it was acclimatized and the most sensitive was Pasancalla TL50 = 8 min when it was not acclimatized. It was also observed that the percentage of cell damage increased as the exposure time to the high temperature was higher

Exactly solvable interacting vertex models

We introduce and solvev a special family of integrable interacting vertex models that generalizes the well known six-vertex model. In addition to the usual nearest-neighbor interactions among the vertices, there exist extra hard-core interactions among pair of vertices at larger distances.The associated row-to-row transfer matrices are diagonalized by using the recently introduced matrix product {\it ansatz}. Similarly as the relation of the six-vertex model with the XXZ quantum chain, the row-to-row transfer matrices of these new models are also the generating functions of an infinite set of commuting conserved charges. Among these charges we identify the integrable generalization of the XXZ chain that contains hard-core exclusion interactions among the spins. These quantum chains already appeared in the literature. The present paper explains their integrability.Comment: 20 pages, 3 figure

Optimal Coherent Filtering for Single Noisy Photons

We introduce a filter using a noise-free quantum buffer with large optical bandwidth that can both filter temporal-spectral modes, as well as inter-convert them and change their frequency. We show that such quantum buffers optimally filter out temporal-spectral noise; producing identical single-photons from many distinguishable noisy single-photon sources with the minimum required reduction in brightness. We then experimentally demonstrate a noise-free quantum buffer in a warm atomic system that is well matched to quantum dots and can outperform all intensity (incoherent) filtering schemes for increasing indistinguishability.Comment: 5 pages, 4 Figure

Check-All-That-Apply (CATA) with semi-trained assessors: Sensory profiles closer to descriptive analysis or consumer elicited data?

Check-All-That-Apply (CATA) is a simple and fast sensory profiling tool. Yet, its application has been mainly focused on consumer studies; the aim of this study was to evaluate the application of CATA with semi-trained (ST) individuals (N = 37). ST individuals were consumers who underwent 1 h of training with physical references on the definition of attributes included in the CATA ballot. ST-CATA results were compared, on a panel level, to Descriptive Analysis (DA) with trained panellists (N = 8) and to CATA with consumers (N = 70). Moreover, the effect of training was examined, to uncover training vs. method-related variations in CATA profiling. ST-CATA and DA exhibited the highest similarity in sample configurations (94%) for two Multiple Factor Analysis factors. For all 3 factors, similarity was over 95% for all method combinations; however the RV coefficient between consumers and DA was marginally significant (P = .08). The extent of explained sensory variations in ST-CATA was not negatively affected by the smaller panel size, compared to consumers’ CATA. Training had a positive effect on attributes’ citation frequency, identification of taste, flavour and complex attribute differences among samples. CATA results did not provide the same range of differences with DA, especially for texture. Overall results support the validity of CATA with ST assessors and suggest its potential for industrial use, when a timely and cost-efficient description of products is required. Attention should be given though when a detailed quantitative profile of sample differences is required, since intensity is not well represented by CATA derived measurements due to the method constraints.info:eu-repo/semantics/acceptedVersio

Condiciones socioeconómicas y familiares de las mujeres víctimas de la violencia intrafamiliar, casos denunciados en Las DIGNAS (Mejicanos, 2011)

El informe exterioriza el carácter cualitativo de la situación de la familia y la mujer salvadoreña, para ofrecer un aporte a la sociedad salvadoreña y entidades que tienen como fin la intervención con esta población. Es de resaltar la necesidad de indagar teórica-práctica y metodológicamente las diferentes situaciones que aquejan a la familia y a la mujer