Search results for "CONSTRAINT"
showing 10 items of 361 documents
Continuum: A spatiotemporal data model to represent and qualify filiation relationships
2013
International audience; This work introduces an ontology-based spatio-temporal data model to represent entities evolving in space and time. A dynamic phenomenon generates a complex relationship network between the entities involved in the process. At the abstract level, the relationships can be identity or topological filiations. The existence of an identity filiation depends on whether the object changes its identity or not. On the other hand, topological filiations are based exclusively on the spatial component, like in the case of growth, reduction, merging or splitting. When combining identity and topological filiations, six filiation relationships are obtained, forming a second abstrac…
Regional headquarters and foreign direct investment
2022
Headquarters (HQs) provide a wide range of services, playing a fundamental role in Foreign Direct Investment (FDI). We use the structural gravity equation to investigate the effect of regional HQs on three dimensions of FDI (number of foreign projects, capital investment, and jobs) at the country-pair-sector level. Furthermore, we explore two underlying mechanisms that help explain this relationship: financial constraints and informational costs and uncertainty. We find a positive effect of regional HQs on FDI, as well as intercountry and intersector spillovers. Our results are robust, accounting for HQ intensity, domestic investment, and endogeneity tests.
Enabling and constraining family: young women building their educational paths in Tanzania
2015
For an increasing number of African girls and women, upgrading the level of education has become a strategy for life improvement. This paper analyses the role that family plays in enabling women's education and contributes to understanding on the interconnectivity of education, work and family in women's lives in collective societies. The analysis focuses on how young Tanzanian women perceive the role of family and education in their ‘youth task’, of becoming adult. The analysis is based on interviews with seven young Tanzanian women enrolled in non-formal secondary education and nine professional women enrolled in higher education. The results show that the women were determined to pursue …
A Domain Imbedding Method with Distributed Lagrange Multipliers for Acoustic Scattering Problems
2003
The numerical computation of acoustic scattering by bounded twodimensional obstacles is considered. A domain imbedding method with Lagrange multipliers is introduced for the solution of the Helmholtz equation with a second-order absorbing boundary condition. Distributed Lagrange multipliers are used to enforce the Dirichlet boundary condition on the scatterer. The saddle-point problem arising from the conforming finite element discretization is iteratively solved by the GMRES method with a block triangular preconditioner. Numerical experiments are performed with a disc and a semi-open cavity as scatterers.
Przejawy finansyzacji na rynku kredytów dla MSP
2016
Małe i średnie przedsiębiorstwa (MSP) odgrywają od lat kluczową rolę w gospodarkach poszczególnych państw i regionów. Stanowią ponad 99% przedsiębiorstw niefinansowych. O ich doniosłym znaczeniu świadczy nie tylko dominująca pozycja pod względem liczby podmiotów, ale również udział w kreowaniu miejsc pracy czy dochodu narodowego. Kluczowym czynnikiem siły i sukcesu MSP jest dostęp do środków finansowych. Badania wskazują, że MSP napotykają większe trudności niż duże firmy w dostępie do źródeł finansowania. W finansowanie swojej działalności, zwłaszcza rozwojowej, MSP angażują mniej środków finansowych pochodzenia zewnętrznego, szczególnie bankowego. Problematykę tę uznać należy za istotną d…
Simultaneous optimization of harvest schedule and measurement strategy
2013
In many recent studies, the value of forest inventory information in the harvest scheduling has been examined. Usually only the profitability of measuring simultaneously all the stands in the area is examined. Yet, it may be more profitable to concentrate the measurement efforts to some subset of them. In this paper, the authors demonstrate that stochastic optimization can be used for defining the optimal measurement strategy simultaneously with the harvest decisions. The results show that without end-inventory constraints, it was most profitable to measure the stands that were just below the medium age. Measuring the oldest stands was not profitable at all. It turned out to be profitable t…
Swelling of cellulose fibres in composite materials: Constraint effects of the surrounding matrix
2013
Swelling of cellulose fibres in composite materials : Constraint effects of the surrounding matrix
Tractional Motion Machines extend GPAC-generable functions
2012
In late 17th century there appeared the Tractional Motion instruments, mechanical devices which plot the curves solving differential equations by the management of the tangent. In early 20th century Vannevar Bush’s Differential Analyzer got the same aim: in this paper we’ll compare the Differential Analyzer mathematical model (the Shannon’s General Purpose Analog Computer, or GPAC) with the Tractional Motion Machine potentials. Even if we will not arrive in defining the class of the functions generated by Tractional Motion Machines, we’ll see how this class will strictly extend the GPAC-generable functions.
De l'infinitive de perception dans la pratique traductologique
2019
The subject of the study are the infinitive subordinate clauses (ICP). These infinitive structures, introduced by a perception verb like voir (‘see’), regarder (‘watch’), entendre (‘hear’), écouter (‘listen’) and sentir (‘smell’), are composed of two complements: a noun phrase and a verb infinitive (j’entends les oiseaux chanter ‘I hear birds sing’). We are interested in ICP in a French-Polish traductological perspective. As this structure, so widespread in French, is not to be found in Polish, this Slavic language offers at least eight different ways of translating it (observed in the corpora), the most frequent of which turns out to be the jak P (‘as P’) structure (*słyszę ptaki śpiewać/ś…
Search for photons with energies above 1018 eV using the hybrid detector of the Pierre Auger Observatory
2017
A search for ultra-high energy photons with energies above 1 EeV is performed using nine years of data collected by the Pierre Auger Observatory in hybrid operation mode. An unprecedented separation power between photon and hadron primaries is achieved by combining measurements of the longitudinal air-shower development with the particle content at ground measured by the fluorescence and surface detectors, respectively. Only three photon candidates at energies 1-2 EeV are found, which is compatible with the expected hadron-induced background. Upper limits on the integral flux of ultra-high energy photons of 0.027, 0.009, 0.008, 0.008 and 0.007 km-2 sr-1 yr-1 are derived at 95% C.L. for ener…