Towards an ecological network for the Carpathians

The Carpathian Biodiversity Information System (CBIS) and the proposal for an ecological network for the eastern part of the Carpathians are the two main outcomes of the project funded by the BBI Matra program of the Dutch government. This brochure presents information on how the CBIS was designed, and how the data stored can be retrieved and used. It also clarifies how the CBIS data were used to design the ecological network and, last but not least, it offers recommendations for the use of the proposed ecological network in supporting sustainable developmentin the Carpathians. Due to funding restrictions, the project focused on three east Carpathian countries: Romania, Serbia and Ukraine, which together host the largest area of the Carpathians (Fig. 2). Geographically, the Eastern Carpathians also include parts of the Carpathians located in Poland and Slovakia. Data collection in the Western Carpathians (Czech Republic, Poland, Slovakia and Hungary) will be completed by 2010 and is funded by a parallel project

Bilateral giant and unilateral duplicated sphenoidal tubercle

The sphenoidal tubercle (SphT), also known as pyramidal tubercle or infratemporal spine projects from the anterior end of the infratemporal crest of the greater sphenoidal wing. As it masquerades the lateral entrance in the pterygopalatine fossa it could obstruct surgical corridors or the access for anaesthetic punctures. The SphT is, however, an overlooked structure in the anatomical literature. During a routine cone beam computed tomography study in an adult male patient we found bilateral giant SphTs transforming the infratemporal surfaces of the greater wing into veritable pterygoid foveae. Moreover, on one side the SphT appeared bifid, with a main giant partition, of 9.17 mm vertical length, and a secondary laminar one. The opposite SphT had 14.80 mm. In our knowledge, such giant and bifid SphTs were not reported previously and are major obstacles if surgical access towards the pterygopalatine fossa and the skull base is intended

Drift dependence of optimal trade execution strategies under transient price impact

We give a complete solution to the problem of minimizing the expected liquidity costs in presence of a general drift when the underlying market impact model has linear transient price impact with exponential resilience. It turns out that this problem is well-posed only if the drift is absolutely continuous. Optimal strategies often do not exist, and when they do, they depend strongly on the derivative of the drift. Our approach uses elements from singular stochastic control, even though the problem is essentially non-Markovian due to the transience of price impact and the lack in Markovian structure of the underlying price process. As a corollary, we give a complete solution to the minimization of a certain cost-risk criterion in our setting

An Optimal Execution Problem with Market Impact

We study an optimal execution problem in a continuous-time market model that considers market impact. We formulate the problem as a stochastic control problem and investigate properties of the corresponding value function. We find that right-continuity at the time origin is associated with the strength of market impact for large sales, otherwise the value function is continuous. Moreover, we show the semi-group property (Bellman principle) and characterise the value function as a viscosity solution of the corresponding Hamilton-Jacobi-Bellman equation. We introduce some examples where the forms of the optimal strategies change completely, depending on the amount of the trader's security holdings and where optimal strategies in the Black-Scholes type market with nonlinear market impact are not block liquidation but gradual liquidation, even when the trader is risk-neutral.Comment: 36 pages, 8 figures, a modified version of the article "An optimal execution problem with market impact" in Finance and Stochastics (2014

Marco de Competencias Básicas de Investigación para Clínicos de Cuidados Paliativos RESPACC

El proyecto financiado por RESPACC ERASMUS+ identificará las competencias de investigación básicas para clínicos de cuidados paliativos. La noción de competencia se refiere a la capacidad de aplicar conocimientos, destrezas y habilidades para realizar con éxito una actividad en el trabajo. Nos enfocamos en mejorar las competencias de investigación básicas en clínicos de equipos multidisciplinarios de cuidados paliativos, tanto a nivel de equipo como individual. Algunas competencias podrían considerarse imprescindibles para realizar una investigación en equipo, pero puede que no sean imprescindibles para todos los miembros del equipo, porque podría ser suficiente que sólo alguien del equipo cuente con dichas competencias para que se lleve a cabo la investigación. OBJETIVO: Identificar un conjunto de competencias de investigación básicas, necesarias para que el equipo paliativo multidisciplinario pueda llevar a cabo un estudio clínico exitoso

High frequency trading strategies, market fragility and price spikes: an agent based model perspective

Given recent requirements for ensuring the robustness of algorithmic trading strategies laid out in the Markets in Financial Instruments Directive II, this paper proposes a novel agent-based simulation for exploring algorithmic trading strategies. Five different types of agents are present in the market. The statistical properties of the simulated market are compared with equity market depth data from the Chi-X exchange and found to be significantly similar. The model is able to reproduce a number of stylised market properties including: clustered volatility, autocorrelation of returns, long memory in order flow, concave price impact and the presence of extreme price events. The results are found to be insensitive to reasonable parameter variations

Pomiary in-situ wysięgników wielonaczyniowych koparek kołowych w kopalniach CEO z wykorzystaniem tensometrów i akcelerometrów

The boom of BWE is a very complex structure, dictated by its functions in operation of the excavator. In the simplest approach, it can be considered as an arm of an R-R robotic manipulator, having at distal extremity the working element, i.e. the bucket wheel, being fixed at proximal extremity by a joint to the turret, which, at its turn is articulated to the infrastructure which includes the undercarriage (travelling mechanism). In order to reduce the weight/stiffness ratio and to include the on board conveyer, the boom is generally embodied as a lattice – truss structure. The constitutive elements i.e. the members and joints are subject to severe loads, which due to their cyclical variable character with a high random component, lead to failures which are caused by overloading and/or fatigue. The actual paper deals with the field measurements performed in past years on several BWEs from CEO open pits, including acceleration measurements and stress measurements using strain gauges. Both kind of sensors-accelerometers and strain gauges were mounted on several critical points of the boom, and the measurements were performed both in normal operation and in some loading-operating scenarios. The recorded data were postprocessed in order to obtain spectral graphs in order to obtain information about the influence of different excitation sources on the boom elements behaviour.Wysięgnik wielonaczyniowej koparki kołowej jest złożoną strukturą definiowaną przez technologię pracy koparki. W celu zmniejszenia stosunku waga/sztywność oraz występowania przenośnika taśmowego wysięgnik jest zaprojektowany jako konstrukcja kratownicowa. Jej elementy są poddawane silnym obciążeniom, które ze względu na ich cykliczny charakter z wysoką składową losową prowadzą do awarii spowodowanych przeciążeniem lub zmęczeniem konstrukcji. Niniejszy artykuł przedstawia pomiary terenowe wykonane w ostatnich latach na wielonaczyniowych koparkach kołowych pracujących w kopalniach CEO za pomocą tensometrów oraz akcelerometrów. Pomiary te zostały zamontowane w krytycznych punktach wysięgnika, a pomiary zostały wykonane zarówno podczas normalnej pracy koparki jak i podczas realizacji scenariuszy obciążenia. Zarejestrowane dane zostały poddane obróbce w celu uzyskania wykresów widmowych

Harvesting the wind energy through an actively controlled pitch-plunge flapping wing

Abstract. A different approach for harvesting the wind energy with an actively controlled pitch-plunge aeroelastic system is investigated. The paper present some theoretical considerations and results regarding an oscillating wing. The performances of the flapping wing system were investigated numerically and experimentally for the power extraction process