Occurrence of <i>Philometra lateolabracis</i> (Nematoda: Philometridae) in the gonads of marine perciform fishes in the Mediterranean region

Gravid females of the nematode Philometra lateolabracis (Yamaguti, 1935), a parasite of gonads of marine perciform fishes, were found in wild and cultured dusky grouper Epinephelus marginatus (Lowe) from waters near the Balear Islands (Spain, Mediterranean Sea) and Sicily (Italy, Thyrrenean Sea), and in the greater amberjack Seriola dumerili (Risso) in Croatia (south-eastern Adriatic Sea). In wild E. marginatus in Spain, the overall prevalence was 21% and the intensity of infection 1 nematode per fish. The nematodes are briefly described and illustrated. The species Sanguinofilaria jordanoi López-Neyra, 1951, described from the ovary of Epinephelus gigas Brünich from Morocco, is synonymized with P. lateolabracis. This is the first documented record of P. lateolabracis from fishes of the Mediterranean region and its finding in S. dumerili represents a new host record. The possible importance of this pathogenic parasite for cultures of marine perciform fishes in the region is stressed

Organizational Routines Development and New Venture Performance

To better understand how entrepreneurial ventures vary as they evolve, we introduce and develop the concept of an organizational routine in a prototypical state, a protoroutine. Protoroutines allow experienced new ventures (but not inexperienced start-ups) to economize on decision-making and execution time in problem solving by drawing from an inventory of prior solutions to challenges. Protoroutines are not, however, tailored to the challenge at hand. We embed protoroutines into a simulation-based model featuring agents with differing decision-making speeds and abilities of exploring more distant solutions, two parameters influenced by founding team characteristics. Search speed and distance are typically traded off against each other at the team design level. Protoroutines may therefore be particularly helpful in organizational contexts in which it is optimal to have both search speed and distance. We characterize the organizational contextual configurations along the dimensions of environmental turbulence and decision complexity in which protoroutines, search speed, and search distance are associated with elevated (and dampened) organizational performance. One important conclusion is that decision-making speed can be a valuable organizational resource across organizational environments. Overall, our agent-based model and simulation results deepen our understanding of how and with what performance consequence new ventures develop

Experimental characterization of nonlocal photon fluids

Quantum gases of atoms and exciton-polaritons are now well-established theoretical and experimental tools for fundamental studies of quantum many-body physics and suggest promising applications to quantum computing. Given their technological complexity, it is of paramount interest to devise other systems where such quantum many-body physics can be investigated at lesser technological expense. Here we examine a relatively well-known system of laser light propagating through thermo-optical defocusing media: based on a hydrodynamic description of light as a quantum fluid of interacting photons, we investigate such systems as a valid room-temperature alternative to atomic or exciton–polariton condensates for studies of many-body physics. First, we show that by using a technique traditionally used in oceanography it is possible to perform a direct measurement of the single-particle part of the dispersion relation of the elementary excitations on top of the photon fluid and to detect its global flow. Then, using a pump-and-probe setup, we investigate the dispersion of excitation modes of the fluid: for very long wavelengths, a sonic, dispersionless propagation is observed that we interpret as a signature of superfluid behavior

Some Exact Results on Tachyon Condensation in String Field Theory

The study of open string tachyon condensation in string field theory can be drastically simplified by making an appropriate choice of coordinates on the space of string fields. We show that a very natural coordinate system is suggested by the connection between the worldsheet renormalization group and spacetime physics. In this system only one field, the tachyon, condenses while all other fields have vanishing expectation values. These coordinates are also well-suited to the study of D-branes as solitons. We use them to show that the tension of the D25-brane is cancelled by tachyon condensation and compute exactly the profiles and tensions of lower dimensional D-branes.Comment: 25 pages, harvma

Cognitive Health of Nonagenarians in Southern Italy: A Descriptive Analysis from a Cross-Sectional, Home-Based Pilot Study of Exceptional Longevity (Cilento Initiative on Aging Outcomes Or CIAO).

Background: Nonagenarians and centenarians (NCs) are an extremely fragile population, particularly in regard to their physical and cognitive function. The aim of this study was to define the neurocognitive profiles among 29 NCs and their 49 younger cohabitants aged 50-75 years from The Cilento Initiative on Aging Outcomes (CIAO) Pilot study in the South of Italy that had provided initial hypotheses regarding positive psychological traits related to exceptional longevity. Methods: During the home visits, lifestyle information with specific questionnaires, functional autonomy and the neuropsychological Mini Mental Scale Examination (MMSE), and the Alzheimer's Disease Assessment Scale-Cognitive (ADAS-Cog) scale were obtained by qualified study personnel. The total blood oxidative capacity was also determined by testing the reactive derivative of oxygen metabolites (d-ROM) and by the Biological Antioxidant Potential (BAP). In all individuals, the APOE genotype determination was also performed. Results: All the subjects in both groups showed high adherence to the Mediterranean Diet. None of the NCs had severe cognitive impairment, and a very low incidence of dementia was found. The data obtained on the Activities ed Instrumental Activities of Daily Living (ADL-IADL) scale showed that the majority of NCs (16/29) were autonomous in daily life activities. The comparative assessment of NCs and cohabitants showed no significant differences in the laboratory assessment of oxidative stress and APOE genotype. Conclusion: In the Cilento Region of Southern Italy, NCs seemed to have good cognitive status when compared to younger cohabitants aging 50-65 years without significant differences in oxidative stress markers or APOE genotype. These results might be related to optimal adherence to the Mediterranean diet, although other lifestyle factors and positive personality traits may also contribute to their healthy aging. Further studies on a larger population should be performed to confirm the results of this pilot study

A framework to design the computational load distribution of wireless sensor networks in power consumption constrained environments

En este documento, presentamos un trabajo basado en la distribución de la carga computacional entre los nodos homogéneos y el Hub/Sink de las Redes de Sensores Inalámbricos (WSN). La principal contribución del trabajo es un marco de apoyo a las decisiones tempranas que ayuda a los diseñadores de WSN a tomar decisiones sobre la distribución de la carga computacional para aquellas WSN en las que el consumo de energía es una cuestión clave (cuando nos referimos a "marco" en este trabajo, lo consideramos como una herramienta de apoyo para tomar decisiones en las que el juicio ejecutivo puede ser incluido junto con el conjunto de herramientas matemáticas del diseñador de WSN; este trabajo muestra la necesidad de incluir la distribución de la carga como un componente integral del sistema de WSN para tomar decisiones tempranas en relación con el consumo de energía). El marco aprovecha la idea de que equilibrar los nodos sensores y la carga computacional del Hub/Sink puede conducir a un mejor consumo de energía para la totalidad o al menos los nodos alimentados por batería de la WSN. El enfoque no es trivial y tiene en cuenta cuestiones conexas como la distribución de los datos necesarios, los nodos y la conectividad y disponibilidad del Hub/Sink debido a sus características de conectividad y su ciclo de trabajo. Para una demostración práctica, el marco propuesto se aplica a un estudio de caso de agricultura, un sector muy relevante en nuestra región. En este tipo de contexto rural, las distancias, los bajos costos debido a los precios de venta de las verduras y la falta de suministro continuo de energía pueden dar lugar a soluciones de detección viables o inviables para los agricultores. El marco propuesto sistematiza y facilita a los diseñadores de las WSN los complejos cálculos necesarios teniendo en cuenta las variables más relevantes en cuanto al consumo de energía, evitando implementaciones completas/parciales/prototipos, y mediciones de diferentes soluciones potenciales de distribución de la carga computacional para una WSN específica.In this paper, we present a work based on the computational load distribution among the homogeneous nodes and the Hub/Sink of Wireless Sensor Networks (WSNs). The main contribution of the paper is an early decision support framework helping WSN designers to take decisions about computational load distribution for those WSNs where power consumption is a key issue (when we refer to “framework” in this work, we are considering it as a support tool to make decisions where the executive judgment can be included along with the set of mathematical tools of the WSN designer; this work shows the need to include the load distribution as an integral component of the WSN system for making early decisions regarding energy consumption). The framework takes advantage of the idea that balancing sensors nodes and Hub/Sink computational load can lead to improved energy consumption for the whole or at least the battery-powered nodes of the WSN. The approach is not trivial and it takes into account related issues such as the required data distribution, nodes, and Hub/Sink connectivity and availability due to their connectivity features and duty-cycle. For a practical demonstration, the proposed framework is applied to an agriculture case study, a sector very relevant in our region. In this kind of rural context, distances, low costs due to vegetable selling prices and the lack of continuous power supplies may lead to viable or inviable sensing solutions for the farmers. The proposed framework systematize and facilitates WSN designers the required complex calculations taking into account the most relevant variables regarding power consumption, avoiding full/partial/prototype implementations, and measurements of different computational load distribution potential solutions for a specific WSN.• Ministerio de Economía y Competitividad y Fondos FEDER. Proyecto TIN2015-69957-R (I+D+i) • Project International Institute of Investigation and Innovation of Aging. Ref. 0445_4IE_4_P • European Regional Development Fund (ERDF) through the Interreg V-A Spain Portugal Program (POCTEP) 2014-2020peerReviewe