Magmenentwicklung und Dioritbildung im synorogen konsolidierten Grundgebirge des Bergsträßer Odenwaldes     

Prof. Dr. Erwin Nickel  Dr. Marino Maggetti 《International Journal of Earth Sciences》1974,63(2):618-654

The genesis of synorogeneous, variscian magmatites from the Bergsträsser Odenwald is explained. They are alternating with steep, old metamorphic rocks (schists and schisteous gneisses, partly transformed to plagioclase-blastites). The magmatites are differentiated into an early-orogenic hornblende-basiteseries (gabbro → diorite) and a high-orogenic biotite-flasermagmatite-series (diorite → granite). The hornblende-basite-series is “normally intrusive” with differentiated syntectic members; the biotite-flasermagmatite-series is lithogenic and has been formed by plagioclase-blastesis and anatexis. At the transition to the high-orogenic phase the rocks develop a strong gneissose foliation (due to movements during the emplacement). The structures assimilate, and a protoclastic to primary-gneissic texture is formed. We name the crystalline in this periode of formation briefly “Synorogen”. The diorites from the two series, as well as the dioritoids and aorites (products of “dioritisation”) show converging structures within the Synorogen. The mobile (ultrametamorphic) stage during the dioritisation and granitisation is discussed.  相似文献   

Maintenance of the fisheries environment and efforts to increase the resources in the coastal waters of Japan     

Tohru Morikawa  President of Marino Forum 《Marine pollution bulletin》1994,29(6-12):537-549

The paper describes the present status of Japan's coastal fisheries resource and the anthropogenic threats to that resource. The increasing industrialization and urbanization of the Japanese coastal fringe has created threats to the important fish and shellfish resource. Legislative mechanisms, such as quality standards, together with an increasing mariculture are used to ensure the sustainable development of the coast.  相似文献   

Seismic performance and new design procedure for chevron‐braced frames     

Edoardo M. Marino  Masayoshi Nakashima 《地震工程与结构动力学》2006,35(4):433-452

The paper is concerned with the seismic design of steel‐braced frames in which the braces are configured in a chevron pattern. According to EuroCode 8 (EC8), the behaviour factor q, which allows for the trade‐off between the strength and ductility, is set at 2.5 for chevron‐braced frames, while 6.5 is assigned for most ductile steel moment‐resisting frames. Strength deterioration in post‐buckling regime varies with the brace's slenderness, but EC8 adopts a unique q value irrespective of the brace slenderness. The study focuses on reevaluation of the q value adequate for the seismic design of chevron‐braced frames. The present EC8 method for the calculation of brace strength supplies significantly different elastic stiffnesses and actual strengths for different values of brace slenderness. A new method to estimate the strength of a chevron brace pair is proposed, in which the yield strength (for the brace in tension) and the post‐buckling strength (for the brace in compression) are considered. The new method ensures an identical elastic stiffness and a similar strength regardless of the brace slenderness. The advantage of the proposed method over the conventional EC8 method is demonstrated for the capacity of the proposed method to control the maximum inter‐storey drift. The q values adequate for the chevron‐braced frames are examined in reference to the maximum inter‐storey drifts sustained by most ductile moment‐resisting frames. When the proposed method is employed for strength calculation, the q value of 3.5 is found to be reasonable. It is notable that the proposed method does not require larger cross‐sections for the braces compared to the cross‐sections required for the present EC8 method. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献   

Static versus modal analysis: influence on inelastic response of multi-storey asymmetric buildings     

A. Ghersi  E. M. Marino  P. P. Rossi 《Bulletin of Earthquake Engineering》2007,5(4):511-532

The paper investigates the influence of design procedures on the seismic response of multi-storey asymmetric buildings. To this end, some structures are designed according to methods based on either static or modal analysis, with or without design eccentricities. The seismic response of these systems is determined by means of inelastic dynamic analyses and the design is thoroughly examined in order to explain the results of the dynamic analyses. Attention is basically focused on the ability of design methods to prevent asymmetric buildings from experiencing ductility demands much larger than those of the corresponding torsionally balanced systems. Numerical analyses underline that while design procedures based on either static or modal analysis are suitable for the design of torsionally rigid structures only those based on modal analysis lead to the satisfactory performance of torsionally flexible buildings. Furthermore, the study highlights the qualities of a design method proposed by the Authors. Its application does not require any explicit calculation of design eccentricities and leads to proper seismic response of both torsionally rigid and flexible asymmetric buildings.  相似文献   

Analysis of waves observed by synthetic aperture radar across ocean fronts     

Shao  Weizeng  Jiang  Xingwei  Nunziata  Ferdinando  Marino  Armando  Yang  Zhehao  Zhang  Youguang  Corcione  Valeria 《Ocean Dynamics》2020,70(11):1397-1407

Ocean Dynamics - In this study, synthetic aperture radar (SAR) imaging of waves across ocean fronts was investigated using C-band Sentinel-1 VV-polarized SAR imagery collected over the Yangtze and...  相似文献   

On the Statistical Properties of Turbulent Energy Transfer Rate in the Inner Heliosphere     

Luca Sorriso-Valvo  Francesco Carbone  Silvia Perri  Antonella Greco  Raffaele Marino  Roberto Bruno 《Solar physics》2018,293(1):10

  相似文献   

Genetic heterogeneity in populations of the Mediterranean shore crab, Carcinus aestuarii (Decapoda,Portunidae), from the Venice Lagoon     

Ilaria Anna Maria Marino  Federica Barbisan  Micol Gennari  Folco Giomi  Mariano Beltramini  Paolo Maria Bisol  Lorenzo Zane 《Estuarine, Coastal and Shelf Science》2010

Heterogeneity in genetic composition among recruits, mostly due to a large variance in reproductive success mediated by oceanographic processes, has been reported for marine species but is less understood in coastal lagoons' organisms. Temporal genetic variation in natural populations of the Mediterranean shore crab Carcinus aestuarii was quantified over a multi-year sample. A total of 486 adult crabs were collected at eight different sites of the Venice Lagoon during the period 2005–2007 and screened for genetic variation using 11 microsatellite loci. Two additional samples (N = 115) from neighbouring sites, located approximately 100 km North and South to the Venice Lagoon, were included for the sake of comparison. Our results show significant differences in allelic frequencies at the micro-geographic scale of the Venice Lagoon, observed between sites of collection, typologies of habitat, and areas with different class of ecological risk or pattern of hemocyanin expression. However, this pattern was not constant between years, with significant differences observed mainly in 2005 and 2006, but not in 2007. Our results indicate significant temporal differences suggesting the existence of dynamic processes that act on the genetic pool of this species. Although natural selection and gene flow might play a role, we suggest that genetic drift linked to large variation in the reproductive success of individuals is the most probable scenario to explain the local genetic patterns of differentiation in the Mediterranean shore crab. Our study, by providing the first evidence for the existence of genetic differences in this species at the micro-geographic scale, suggests that a better comprehension of the link between reproduction, recruitment and oceanography is critical to understand how colonization and maintenance of genetic variation is achieved in ephemeral and vulnerable environments such as coastal lagoons.  相似文献   

Signatures of recent star formation in ring S0 galaxies     

A. Marino  L. Bianchi  R. Rampazzo  D. Thilker  F. Annibali  A. Bressan  L. M. Buson 《Astrophysics and Space Science》2011,335(1):243-248

We present a study of the stellar populations of ring and/or arm-like structures in a sample of S0 galaxies using GALEX far- and near-ultraviolet imaging and SDSS optical data. Such structures are prominent in the UV and reveal recent star formation. We quantitatively characterize these rejuvenation events, estimating the average age and stellar mass of the ring structures, as well as of the entire galaxy. The mass fraction of the UV-bright rings is a few percent of the total galaxy mass, although the UV ring luminosity reaches 70% of the galaxy luminosity. The integrated colors of these S0s locates them in the red sequence (NGC 2962) and in the so-called green valley. We suggest that the star formation episodes may be induced by different triggering mechanisms, such as the inner secular evolution driven by bars, and interaction episodes.  相似文献   

Design method and behavior factor for steel frames with buckling restrained braces     

Melina Bosco  Edoardo M. Marino 《地震工程与结构动力学》2013,42(8):1243-1263

Buckling restrained braces (BRBs) are very effective in dissipating energy through stable tension–compression hysteretic cycles and have been successfully experimented in the seismic protection of buildings. Their behavior has been studied extensively in the last decades and today the level of performance guaranteed by these devices and the technological constrains that have to be fulfilled to optimize their behavior are well known. Furthermore, several companies in the world have developed their own BRBs and are now producing them. In spite of this, many seismic codes (for instance, the EuroCode 8) do not stipulate provisions for the design and construction of earthquake‐resistant structures equipped with BRBs. This discourages the structural engineering community from using these devices and seriously limits their use in structural applications. In this paper a procedure for the seismic design of steel frames equipped with BRBs is proposed. Furthermore, the paper presents a numerical investigation aimed at validating this design procedure and proposing the value of the behavior factor q that should be used for this structural type. To this end, a set of frames with BRBs is first designed by means of several values of q. Then, the obtained frames are subjected to a set of accelerograms compatible with the elastic response spectrum considered in design. The seismic response of the frames is determined by nonlinear dynamic analysis and represented in terms of the ductility demand of BRBs and the internal force demand of nondissipative members (beams and columns). Finally, the largest value of q that leads to acceptable seismic performance of the analyzed frames is assumed as adequate. The value of q is given in the paper as a continuous function of the assumed ductility capacity of the BRBs. Copyright © 2012 John Wiley & Sons, Ltd.  相似文献   

The UV window on counter rotating ETGs: insight from SPH simulations with chemo-photometric implementation     

D. Bettoni  P. Mazzei  R. Rampazzo  A. Marino  G. Galletta  L. M. Buson 《Astrophysics and Space Science》2014,354(1):83-88

The Galaxy Evolution Explorer (GALEX) detected ultraviolet emission in about 50 % of multi-spin early-type galaxies (ETGs), suggesting the occurrence of a recent rejuvenation episode connected to the formation of these kinematical features. With the aim at investigating the complex evolutionary scenario leading to the formation of counter rotating ETGs (CR-ETGs) we use our Smooth Particle Hydrodynamic (SPH) code with chemo-photometric implementation. We discuss here the UV evolutionary path of two CR-ETGs, NGC 3593 and NGC 5173, concurrently best fitting their global observed properties, i.e., morphology, dynamics, as well as their total B-band absolute magnitude and spectral energy distribution (SED) extended over three orders of magnitude in wavelength. These simulations correspond to our predictions about the target evolution which we follow in the color-magnitude diagram (CMD), near-UV (NUV) versus r-band absolute magnitude, as a powerful diagnostic tool to emphasize rejuvenation episodes.  相似文献