Cynoglossum clandestinum Desf. (Boraginaceae), a new especies for the flora of the Catalan Countries

Es dóna a conèixer una localitat nova de Cynoglossum clandestinum Desf. a la comarca de la Vall d’Albaida, que representa una novetat per a la flora dels Països Catalans. Es realitzen comentaris sobre els caràcters morfològics, l’hàbitat i l’estat de conservació. Es discuteix també sobre la seva inclusió en alguna de les categories del Decret 70/2009, que inclou el «Catàleg Valencià d’Espècies de Flora Amenaçada».Cynoglossum clandestinum Desf. has been found in Catalan Countries for the first time. Several comments on the morphological characterization, the habitat and the convervation estatus are reported. We discussed about the need to include it in the Decree 70/2009, in which includes the “Valencian Catalogue of Threatened Plant Species”

Cynoglossum clandestinum Desf. (Boraginaceae), una espècie nova per a la flora dels Països Catalans

Es dóna a conèixer una localitat nova de Cynoglossum clandestinum Desf. a la comarca de la Vall d'Albaida, que representa una novetat per a la flora dels Països Catalans. Es realitzen comentaris sobre els caràcters morfològics, l'hàbitat i l'estat de conservació. Es discuteix també sobre la seva inclusió en alguna de les categories del Decret 70/2009, que inclou el «Catàleg Valencià d'Espècies de Flora Amenaçada».Cynoglossum clandestinum Desf. has been found in Catalan Countries for the first time. Several comments on the morphological characterization, the habitat and the convervation estatus are reported. We discussed about the need to include it in the Decree 70/2009, in which includes the "Valencian Catalogue of Threatened Plant Species"

Buckling instability of web plastifying dampers: analytical and numerical approach

This paper describes a numerical study on the instability of a brace-type seismic damper based on the out of plane yielding of the web of wide-flange steel sections (Web Plastifying Damper, WPD)The damper is intended to be installed in a framed structure as a standard diagonal brace. Under lateral forces, the damper is subjected to high axial forces, therefore its buckling instability is a matter of concern. Several finite element models representing WPDs with different axial stiffness and various geometries of their components were developed and analyzed taking into account both material and geometrical nonlinearities. The influence of several parameters defining the WPD in the load-displacement curve was examined. Furthermore, a simplified model to predict the buckling load is proposed

Low-cost retrofitting solutions for RC frames using masonry infill panels

A large number of reinforced concrete (RC) frame structures built in earthquake-prone areas such as Haiti are vulnerable to strong ground motions. Structures in developing countries need low-cost seismic retrofit solutions to reduce their vulnerability. This paper investigates the feasibility of using masonry infill walls to reduce deformations and damage caused by strong ground motions in brittle and weak RC frames designed only for gravity loads. A numerical experiment was conducted in which several idealized prototypes representing RC frame structures of school buildings damaged during the Port-au-Prince earthquake (Haiti, 2010) were strengthened by adding elements representing masonry infill walls arranged in different configurations. Each configuration was characterized by the ratio Rm of the area of walls in the direction of the ground motion (in plan) installed in each story to the total floor area. The numerical representations of these idealized RC frame structures with different values of Rm were (hypothetically) subjected to three major earthquakes with peak ground accelerations of approximately 0.5g. The results of the non-linear dynamic response analyses were summarized in tentative relationships between Rm and four parameters commonly used to characterize the seismic response of structures: interstory drift, Park and Ang indexes of damage, and total amount of energy dissipated by the main frame. It was found that Rm=4% is a reasonable minimum design value for seismic retrofitting purposes in cases in which available resources are not sufficient to afford conventional retrofit measures

Algunas especies nuevas o poco citadas para la comarca de la Safor (Valencia), II

Se aportan citas de 27 táxones de flora vascular que han sido poco citadas en la comarca de la Safor o que constituyen una novedad para la flora de dicha comarca valenciana. Para algunas de las especies se comentan, además, datos sobre la ecología y la distribución. Entre las especies citadas destacan Parentucellia viscosa, Narcissus perezlarae, Kosteletzkya pentacarpos, Ophioglossum lusitanicum, Silene diclinis, Serapias parviflora, Asplenium trichomanes subsp. inexpectans y Aster willkommii, incluídas todas ellas en el Decreto 70/2009

利用状況

Comparison of the amount and nature of suspended matenal within Pos~donia oceanica canopies, in 6 meadows in the Spanish Mediterranean coast differing in extent and depth, with those in the overlying waters showed the canopies to be significantly enriched in particulate organic carbon, nitrogen and phosphorus relative to the overlying waters (on average, 87, 34 and 54 % more C, N and P, respectively). Biovolume of detntus (both angiosperm-denved and plankton-denved) was large, par- ticularly within seagrass canopies, where it dominated the seston pool (about 5-fold greater biovolume than that of living particles), compared to a roughly equal biovolume of detntal and llving particles in the parhcle pools in the overlying waters. The dominance of detrital particles was further reflected in the high C/N and C/P ratios of the suspended materials (median atonuc C : N . P ratios = 492: 40.9: 1 and 596:45.1 of the matenals suspended within the canopy and in the overly~ng waters, respectively), which were intermediate between those of living plankton and P oceanica. The relative ennchment of P oceanica canopies by part~cles tended to be greatest when particle loads in the overlying waters were small, suggesting that the effect of seagrasses as traps of particles is enhanced in particle-poor waters The results obtained support the hypothesis that the water within seagrass canopies is enriched by (mostly detrital) part~cles, particularly In particle-poor waters T h ~ s suggests that seagrasses not only contribute a substanhal fraction of the particles themselves, but also act as sinks of particles.This work is a contribution to the project MAS3-CT96-0053 of the ELOISE programme, funded by MAST I11 (CE)Peer reviewe

Assessment of expected damage on buildings subjected to Lorca earthquake through an energy-based seismic index method and nonlinear dynamic response analyses

The city of Lorca (Spain) was hit on May 11th, 2011, by two consecutive earth-quakes of magnitudes 4.6 and 5.2 Mw, causing casualties and important damage in buildings. Many of the damaged structures were reinforced concrete frames with wide beams. This study quantifies the expected level of damage on this structural type in the case of the Lorca earth-quake by means of a seismic index Iv that compares the energy input by the earthquake with the energy absorption/dissipation capacity of the structure. The prototype frames investigated represent structures designed in two time periods (1994–2002 and 2003–2008), in which the applicable codes were different. The influence of the masonry infill walls and the proneness of the frames to concentrate damage in a given story were further investigated through nonlinear dynamic response analyses. It is found that (1) the seismic index method predicts levels of damage that range from moderate/severe to complete collapse; this prediction is consistent with the observed damage; (2) the presence of masonry infill walls makes the structure very prone to damage concentration and reduces the overall seismic capacity of the building; and (3) a proper hierarchy of strength between beams and columns that guarantees the formation of a strong column-weak beam mechanism (as prescribed by seismic codes), as well as the adoption of counter-measures to avoid the negative interaction between non-structural infill walls and the main frame, would have reduced the level of damage from Iv=1 (collapse) to about Iv=0.5 (moderate/severe damage