433 research outputs found

    Colonización espontánea de taludes de desmonte sobre margas en Navarra: establecimiento y fuente de diásporas.

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    Tras la hidrosiembra de taludes de desmonte sobre margas en localidades navarras con clima submediterráneo se implanta una cubierta vegetal de especies hidrosembradas que experimenta una rápida regresión, tal y como hemos observado en estudios previos. A pesar de ello, algunas especies autóctonas son capaces de colonizar estas superficies. Describimos la capacidad de colonización de estas últimas especies, cuyas diásporas proceden de la lluvia de semillas, para determinar si también les afecta la regresión observada en las especies hidrosembradas. También estudiamos su distribución espacial para determinar la fuente de diásporas. A pesar de la gran dificultad para colonizar los desmontes, las especies autóctonas no siguen el modelo regresivo que presentan las especies hidrosembradas en desmontes de similares características en Navarra. Por otro lado, la mayoría de las especies disminuyen su abundancia al aumentar la distancia a la zona superior del talud, donde se encuentra la vegetación que actúa como principal fuente de diásporas

    Arenas de dragado marino como nueva fuente para materiales de construcción

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    This work deals with the use of dredged marine sand (DMS) in pastes and mortars as construction material. Different materials from two Spanish ports were used: DMS-0 from Sant Carles de la Ràpita and DMS-A, DMS-B and DMS-C from Barcelona. The aim of the study was to assess DMS as addition (its influence on cohesion and fluidity) or as a fine granular corrector (its influence on compressive strength) in different mixes of cement paste and mortars, respectively. Two experimental stages were carried out: firstly, DMS-0 material was used on the production of pastes and mortars (partial substitution of raw sand 0/2 mm); secondly, DMS-A, DMS-B and DMS-C were used on mortar production (partial substitution of raw sand 0/5 mm). The fresh and hardened properties obtained were compared to those of the control mixes; the results revealed 25 % as an optimum substitution ratio of raw sands for DMS.Este trabajo propone el uso de arenas de dragado marino (DMS) en pastas y morteros como material constructivo. Se utilizaron materiales de dos puertos españoles: DMS-0 del puerto de Sant Carles de la Ràpita, y DMS-A, DMS-B y DMS-C del puerto de Barcelona. El objetivo del estudio era evaluar el material DMS como adición (influencia sobre cohesión y fluidez) o como corrector granular (influencia sobre resistencia a la compresión) en diferentes mezclas de pasta y morteros de cemento, respectivamente. Se realizaron dos fases experimentales: primero, se empleó el DMS-0 en la producción de pastas y morteros (sustitución parcial de arena natural 0/2 mm); a continuación, se emplearon DMS-A, DMS-B y DMS-C en la producción de morteros (sustitución parcial de arena natural 0/5 mm). Los resultados obtenidos fueron comparados con las mezclas de control y revelaron que la proporción óptima de sustitución de arenas naturales por DMS era del 25 %

    A new approach to Negative Concord : Catalan as a case in point

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    Altres ajuts: acords transformatius de la UABPublished online: 25 August 2023In this paper, we revisit the phenomenon of Negative Concord focusing on the Strict vs. Non-Strict divide. With Catalan as a case in point, we show that Negative Concord Items (NCIs) are not negative quantifiers (NQs) or polarity items (PIs) but inherently negative indefinites by virtue of carrying a negative feature [neg] that contributes a negative semantics to the proposition and is subject to a syntax-phonology constraint that forces it to overtly c-command Tense in compliance with Jespersen's NegFirst principle. We argue that to satisfy such constraint, [neg] can disembody from the NCI via overt Move F(eature) to adjoin at a pre-Infl(ection) position and be Spelled-Out homophonous to the negative marker. The Strict vs. Non-Strict contrast follows from whether [neg] always moves independently from the rest of the NCI via Move F (Strict Negative Concord) or predates, whenever possible, on another movement of the NCI that places [neg] in the required pre-Infl position (Non-Strict Negative Concord) thus not having to disembody

    Biodiversity accounting and reporting: A systematic literature review and bibliometric analysis

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    Towards the improvement of environmental sustainability and the conservation of biodiversity, organisations are increasingly aware of the importance of reporting their impacts on biodiversity and the conservation plans undertaken. Biodiversity accounting and reporting are relevant for developing organisational practices oriented towards environmental sustainability, promoting cleaner management policies with less impact on the environment. Biodiversity accounting research has attracted scholars in business management and accounting, and as a result, the literature in the field has grown in recent years. This study analyses the intellectual structure of the biodiversity accounting and management discipline through a systematic literature review, along with bibliometric techniques based on a co-word analysis of the main keywords included in 63 publications. The results reveal five thematic clusters: one motor cluster (sustainability), two transversal clusters (biodiversity reporting, corporate biodiversity management) and two isolated clusters (environmental protection, emancipatory accounting). In addition, the content of the selected papers is analysed and promising research paths are found, such as the need for more robust quantitative analyses or the development of new forms of emancipatory accounting. The study discusses the main insights from the analysis, proposes future research directions and provides practical implications for biodiversity protection and environmental sustainability. © The Author

    On the status of NCIs : An experimental investigation on so-called Strict NC languages

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    Altres ajuts: acords transformatius de la UABPublished online by Cambridge University Press: 25 August 2023. First ViewThis paper investigates the status of Negative Concord Items (NCIs) in three so-called Strict Negative Concord (NC) languages (namely, Greek, Romanian, and Russian). An experimental study was designed to gather evidence concerning the speakers' acceptability and interpretation of sequences with argumental NCIs in subject, object, and both positions when dhen/nu/ne were not present. Our results show that NCIs are negative indefinites whose presence in a clausal domain is enough to assign a single negation reading to the whole sequence, thus arguing in support of the hypothesis that in NC structures the minimal semantic requirement to convey single negation is that one or more NCIs encoding a negative feature appear within a sentential domain. We argue that in these structures dhen/nu/ne are the instantiations of a negative feature [neg] disembodied from an indefinite negative NCI in order to obey a syntax-phonology interface constraint

    Sustainability reporting in view of the European sustainable finance taxonomy: Is the financial sector ready to disclose circular economy?

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    The European sustainable finance taxonomy requires financial and nonfinancial companies to provide investors with information about the environmental performance of their assets and economic activities. For financial institutions, making socially and environmentally responsible investments visible through a common label that guarantees specific standards for the entire European Union is crucial. Against this background, this study analyzes the evolution of sustainability reporting practices and their assurance in a sample of European financial institutions. To this end, we used a double qualitative methodological approach, based on (a) an external analysis of nonfinancial information and its relationship with the main economic-financial variables of the sample companies, and (b) a case study of a bank carried out through semi-structured interviews. This study provides an external measurement analysis of nonfinancial information in entities from different countries, which can contribute to broadening the scope and level of sustainability and circular economy accountability
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