Search results for "edge"

Source components and enrichment processes in the mantle wedge beneath Luzon (Philippines)

1998

Outgassing of Mantle Volatiles in Compressional Tectonic Regime Away From Volcanism: The Role of Continental Delamination

2019

In this study we discuss the occurrence of mantle-derived heat and volatiles (i.e., helium and CO 2 ) feeding hydrothermal systems in a seismically active margin between two convergent plates (African and European) without any signals of volcanism. The helium (He) isotopes clearly indicate a mantle-derived component in the outgassing volatiles. The estimated mantle-derived He fluxes are up to two to three orders of magnitude greater than those in a stable continental area. Such high He fluxes cannot be provided by a long-lasting diffusion, thereby implying a more efficient transport (i.e., advective transport through faults). He data coupled to heat-He relationship suggest the occurrence of…

Os-isotope constraints on the dynamics of orogenic mantle: The case of the Central Balkans

2015

Abstract We used Os isotopic systematics to assess the geochemical relationship between the lithospheric mantle beneath the Balkans (Mediterranean), ophiolitic peridotites and lavas derived from the lithospheric mantle. In our holistic approach we studied samples of Tertiary post-collisional ultrapotassic lavas sourced within the lithospheric mantle, placer Pt alloys from Vardar ophiolites, peridotites from nearby Othris ophiolites, as well as four mantle xenoliths representative for the composition of the local mantle lithosphere. Our ultimate aim was to monitor lithospheric mantle evolution under the Balkan part of the Alpine-Himalayan belt. The observations made on Os isotope and highly …

Evidence for boron incorporation into the serpentine crystal structure

2011

Serpentinite mud volcanoes from the Mariana forearc comprise B-rich mantle wedge peridotites serpentinized by slab fluids. The major component of these rocks are serpentine group minerals [Mg 3 Si 2 O 5 (OH) 4 ], showing highly variable textural and geochemical features. Micro-Raman spectroscopy reveals that the serpentine minerals are well-crystallized lizardite and chrysotile. In situ SIMS spot analyses and element mapping via ToF-SIMS show that B is evenly distributed across serpentine grains, suggesting that serpentine, both lizardite and chrysotile in different textural regions, can host significant amounts of B (up to ~200 μg/g) into its crystal structure. As such structurally bound B…

Special Issue on Higher education and its clients : institutional responses to changes in demand and in environment

2002

02048

Demographic variables and fathers' involvement with their child with disabilities

2013

The main purpose of this study is to examine whether fathers' involvement with their child with disabilities is correlated with some of the demographic variables. Data were collected from 243 Polish fathers who were married and who had at least one child with disabilities. The issue was assessed by two measures: a Questionnaire and the Father Involvement Scale. The results of the multiple regression show that fathers' involvement is significantly (P < 0.05) correlated with the level of fathers' concentration on the needs of their child with disabilities, the level of fathers' cooperation with their wives, the number of years during which parents cared for a child with disabilities, time dev…

Catastrophic risks and the pricing of catastrophe equity put options

2021

In this paper, after a review of the most common financial strategies and products that insurance companies use to hedge catastrophic risks, we study an option pricing model based on processes with jumps where the catastrophic event is captured by a compound Poisson process with negative jumps. Given the importance that catastrophe equity put options (CatEPuts) have in this context, we introduce a pricing approach that provides not only a theoretical contribution whose applicability remains confined to purely numerical examples and experiments, but which can be implemented starting from real data and applied to the evaluation of real CatEPuts. We propose a calibration framework based on his…

New Challenges of Economic and Business Development – 2012 : Conference Proceedings (May 10 - 12, 2012, Riga, University of Latvia)

2012

Support for Conference Proceedings by ERAF Project "Support for the international cooperation projects and other international cooperation activities in research and technology at the University of Latvia" No. 2010/0202/2DP/2.1.1.2.0/10/APIA/VIAA/013

Does incremental and radical innovation performance depend on different types of knowledge accumulation capabilities and organizational size?

2016

While prior studies recognize the importance of knowledge accumulation capabilities in innovation performance, current research has still failed to empirically identify its role with regard to different types of innovation performance. The objective of this paper is to address this knowledge gap and to explore the relationships between internal knowledge creation and absorptive capabilities, and incremental and radical innovation performance. The study also contributes to analyzing the complex effect that organizational size has in the whole innovation process, influencing its antecedents (internal knowledge creation capability and absorptive capability) as well as its outputs (incremental …

University–industry partnerships for the provision of R&D services

2015

Technology Transfer Offices (TTOs) are the main institutions responsible for the establishment of university–industry partnerships. R&D contracts exemplify the indirect mechanisms through which enterprises and universities collaborate on a win–win basis. This study addresses organizational and institutional aspects that act as drivers for the establishment of successful university–industry partnerships. First, a series of regression models explain the determinants of R&D contracts. These models include two main dimensions: the university and the technology transfer office. Second, further analysis empirically explores whether universities in regions with a favorable environment enjoy greate…