Search results for "Proa"
showing 10 items of 1834 documents
Ressources naturelles et développement dans le monde tropical : les contradictions entre dynamiques écologiques, reproduction sociale et ordre économ…
2013
Natural resources are in the midst of contradictory dynamics. While they are essential to the reproduction of societies and life, actual organization of the world economy subordinates them to logics of accumulation. In addition to the fact that these logics don't take into account (consider) the physical limits inside of which humanity evolves, they induce problematic socio-ecological inequalities at different scales. Indeed, actual international economic order tends to generate ecologically unequal exchanges, which disrupt the development of primary exporting countries and threaten the most vulnerable populations and ecosystems inside of them.Tropics are the typical context in which such c…
Monetary circulation, the paradox of profits, and the velocity of money
2007
Recent papers have reconsidered the paradox of profits, that is the difficulty to explain how monetary profits can be generated when firms borrow only the wage bill to finance their production. In this article, we use a stock-flow consistent approach give a solution to this paradox assuming that, when firms sell goods at prices which exceed their unit costs, the realised monetary profits are not used to pay back banks. These profits then remain in the circuit, allowing additional transactions. In a sense, profits result from their own expenditure. According to this interpretation, the velocity of money is higher than one because some monetary units are used in several transactions of goods.
Capturing learning in classroom interaction in mathematics: Methodological considerations
2015
International audience; This paper discusses issues of how to transcribe and analyze video-recordings when studying learning in small group work in mathematics. Since bodily features of interaction and the use of artefacts play important roles in mathematical reasoning, a multimodal approach to transcribing is necessary. Thus, the theoretical grounding for transcriptions has to be in accord with the perspective on learning adopted in the analysis. In the paper, the principles for studying what Radford (2000) refers to as knowledge objectification processes when learning mathematics will be discussed.
From real-life experience to map. Using landscape as a tool for decentralized urban planning
2010
International audience; The large diffusion of GIS is greatly improving the capacities of territorial analysis; yet these tools are increasing the weight of cartographic representations and the gap between the everyday's space and the space of town planning projects. GIS are certainly essential tools, but they require a reflection about their territorial effects. The maps of "intervisibility" which are produced this way are difficult to understand and address the issue of mediation. We propose to contribute to the reflection through experiments conducted in France. We successively used maps and photos within the framework of town planning projects; we are now able to propose a protocol whic…
Reproduction behaviors : permanencies and changes : for a contextual and dynamic approach of the fertility
2015
Current levels of African fertility are, for most observers, the expression of a continuation of traditional values of ancestral essence. For those observers, the traditional values continue to determine reproductive behavior, despite the economic, political and social changes. Based on the case of the Republic of Congo, dynamic and contextual analysis of these behaviors, reveal that these are rather clear break from the current level of fertility; they suggest significant unmet need for birth control. It is possible that a Malthusian reflex develops gradually, which does not exclude the need for children, contrary to some theories. These behaviors are characterized by profound changes resu…
Impact of the structure of polysaccharide-based food gels on the release of aroma compounds: an APCI-MS approach
2006
International audience
A critical size for emergence of nonbulk electronic and geometric structures in dodecanethiolate-protected Au clusters.
2014
We report on how the transition from the bulk structure to the cluster-specific structure occurs in n-dodecanethiolate-protected gold clusters, Au(n)(SC12)m. To elucidate this transition, we isolated a series of Au(n)(SC12)m in the n range from 38 to ∼520, containing five newly identified or newly isolated clusters, Au104(SC12)45, Au(∼226)(SC12)(∼76), Au(∼253)(SC12)(∼90), Au(∼356)(SC12)(∼112), and Au(∼520)(SC12)(∼130), using reverse-phase high-performance liquid chromatography. Low-temperature optical absorption spectroscopy, powder X-ray diffractometry, and density functional theory (DFT) calculations revealed that the Au cores of Au144(SC12)60 and smaller clusters have molecular-like elec…
Vērtībizglītība angļu valodas stundās vidusskolā
2019
Vērtībizglītība ir nozīmīga modernas un kvalitatīvas izglītības daļa, kura savu aktualitāti ir veicinājusi arī izglītības satura reformu kontekstā Latvijā. Tādēļ maģistra darba mērķis bija gan iepazīt vertībizglītības teoriju, gan izpētīt, kā izmantot vērtībizglītības pieeju vidusskolā angļu valodas stundās. Lai mērķi sasniegtu, Autors veica atsevišķa gadījuma pētījumu un izmantoja īpaši atlasītus uzdevumus angļu valodas nodarbībās vidusskolā, lai veicinātu skolēnu izpratni par vērtībām. Autors secināja, ka uzdevumi ir noderīgi, un uzdevumu izmantošana paaugstināja audzēkņu izpratni par vērtībām. Autors secināja, ka ir ļoti aktuāli mācīt un stāstīt par vērtībizglītību visas stundās. Maģistr…
The Individual-level Productivity Costs of Physical Inactivity
2023
Abstract Purpose: This study estimated the long-term individual-level productivity costs of physical inactivity. Methods: The data were drawn from the Northern Finland Birth Cohort 1966, to which the productivity cost variables (sick leaves and disability pensions) from Finnish registries were linked. Individuals (N = 6261) were categorized into physical activity groups based on their level of physical activity, which was measured in three ways: 1) self-reported leisure-time moderate- to vigorous-intensity physical activity (MVPA) at 46 yr old, 2) longitudinal self-reported leisure-time MVPA at 31–46 yr old, and 3) accelerometer-measured overall MVPA at 46 yr old. The human capital approach…