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Search Results: 1 - 10 of 5679 matches for " Vera Meynen "
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Synthesis and catalytic applications of combined zeolitic/mesoporous materials
Jarian Vernimmen,Vera Meynen,Pegie Cool
Beilstein Journal of Nanotechnology , 2011, DOI: 10.3762/bjnano.2.87
Abstract: In the last decade, research concerning nanoporous siliceous materials has been focused on mesoporous materials with intrinsic zeolitic features. These materials are thought to be superior, because they are able to combine (i) the enhanced diffusion and accessibility for larger molecules and viscous fluids typical of mesoporous materials with (ii) the remarkable stability, catalytic activity and selectivity of zeolites. This review gives an overview of the state of the art concerning combined zeolitic/mesoporous materials. Focus is put on the synthesis and the applications of the combined zeolitic/mesoporous materials. The different synthesis approaches and formation mechanisms leading to these materials are comprehensively discussed and compared. Moreover, Ti-containing nanoporous materials as redox catalysts are discussed to illustrate a potential implementation of combined zeolitic/mesoporous materials.
Microvolume TOC Analysis as Useful Tool in the Evaluation of Lab Scale Photocatalytic Processes
Monika Kus,Stefan Ribbens,Vera Meynen,Pegie Cool
Catalysts , 2013, DOI: 10.3390/catal3010074
Abstract: Analysis methods that require small volumes of aqueous samples can be of large benefit for applications when expensive chemicals are involved or available volumes are substantially small and concentrations are low. A new method is presented to allow microvolume liquid injections on TOC equipment using a special designed Shimadzu gas injection kit ? in combination with a high precision syringe and Chaney adapter. Next to details on the methodology of microvolume TOC injections, the technique is shown to be beneficial to evaluate the efficiency of photocatalytic dye degradation on titania materials in terms of CO 2 conversion simultaneously with classic UV-Vis analysis measurements within a lab scale photocatalytic test setup (volume <100 mL). The possibility to allow multiple microvolume samplings in short time intervals during several hours without a substantial decrease in volume/catalyst ratio is of particular value for the evaluation of photocatalysts. By combining both techniques at short time intervals, additional knowledge of the degradation process/mechanism, kinetics and the efficiency can be obtained in a direct way. Moreover, the developed μV-TOC analysis is specifically useful in those applications in which low sample volumes in combination with low concentrations are involved. For example, μV-TOC can similarly be put into service in a wide range of small volume setups, e.g., analytes from high-throughput screening, pharmaceutical applications and other advanced oxidation processes that formally could not be analyzed due to limited sample volumes and often low concentrations.
Generalized anxiety disorder and online intelligence: A phenomenological account of why worrying is unhelpful
Gerben Meynen
Philosophy, Ethics, and Humanities in Medicine , 2011, DOI: 10.1186/1747-5341-6-7
Abstract: Worrying is the core feature of generalized anxiety disorder (GAD) [1-4]. Many people worry from time to time, but in GAD the worrying is prolonged and difficult to control. Worrying is a way of coping with perceived threats. Yet, usually, it is not considered to be a helpful strategy for dealing with future situations [5], and the phenomenological account developed in this paper aims to show why.There are various ways to explain the prolonged and uncontrollable worrying that occurs in GAD [2]. The present paper, however, is restricted to an explanation in phenomenological terms. Central to this account is to conceive of the human being as 'being-in-the-world' in the sense of an agent in continuous, embedded interaction with the environment. More specifically, my account is informed by Michael Wheeler's application of phenomenological (mainly Heideggerian) notions to artificial intelligence (AI) and the cognitive sciences. His approach - in which the concept of 'online intelligence' is central - enables us to articulate an unhelpful 'metacognition' in GAD (see next section), and, moreover, to explain why treating this condition requires cognitive as well as behavioral interventions. I suggest that the overall picture derived from this phenomenological perspective can also be communicated to GAD patients, hopefully providing them with additional motivation to find more helpful coping strategies than worrying.The outline of the paper is as follows. First, I introduce GAD and the concept of worrying which is central in theorizing about GAD. Next, I present and discuss a phenomenological account of 'being in the world'. I start out explaining some central Heideggerian notions and then proceed to Wheeler's radical interpretation of these notions, articulated by the concept of 'online intelligence'. Then, I show how both accounts - theorizing about worrying in GAD on the one hand and online intelligence on the other - can be linked in order to explain why worrying in GAD
Second Language Acquisition: Reconciling Theories  [PDF]
Vera Menezes
Open Journal of Applied Sciences (OJAppS) , 2013, DOI: 10.4236/ojapps.2013.37050
Abstract:

This article argues that previous attempts to explain SLA should not be disregarded. Instead, when they are put together, they provide a broader and deeper view of the acquisition process. There is evidence to support the claim that second language acquisition (SLA) is a complex adaptive system due to its inherent ability to adapt to different conditions present in both internal and external environments. Based on this understanding, widely discussed second language theories, including behaviorism, will be treated as explanations of parts of a whole, since each captures a different aspect of SLA. In order to justify this assumption, excerpts from some English language learning histories are provided to exemplify how learners describe their learning processes. The final claim is that SLA should be seen as a chaotic/complex system.

Improved Retrieval of Sea Ice Thickness and Density from Laser Altimeter  [PDF]
Vera Djepa
Atmospheric and Climate Sciences (ACS) , 2014, DOI: 10.4236/acs.2014.45080
Abstract: The sensitivity of weather and climate system to sea ice thickness (SIT) in the Arctic is recognised from various studies. Decrease of SIT will affect atmospheric circulation, temperature, precipitation and wind speed in the Arctic and remotely. Ice thermodynamics and dynamic properties depend strongly on ice and snow thickness. The heat transfer through ice critically depends on ice thickness. Long term accurate SIT records with corresponding uncertainties are required for improved seasonal weather forecast and estimate of the sea ice mass balance. Satellite radar and Laser Altimeter (LA) provide long term records of sea ice freeboard. Assuming isostatic equilibrium, SIT is retrieved from the freeboard, extracted from radar altimeter (RA) or LA, where the snow depth, density, ice and water density are input variables in the equation for hydrostatic equilibrium to derive SIT from LA or RA. Different input variables (snow depth, density, ice and water density) with unknown accuracy have been applied from various authors to retrieve SIT and Sea Ice Draft (SID) from RA or LA, leading to not comparative results. Sea ice density dependence on ice type, thermodynamic properties and freeboard is confirmed with different studies. Sensitivity analyses confirm the great impact of sea ice density, snow depth and density on accuracy of the retrieved SIT and the importance of inserting variable ice density (VID) in the equation for hydrostatic equilibrium for more accurate SIT retrieval, weather and climate forecast. The impact of sea ice density and snow depth and density on retrieved SIT from the freeboard derived from LA and RA have been analyzed in this study using the equation for hydrostatic equilibrium, statistical and sensitivity analyses. An algorithm is developed to convert the freeboard, derived from LA in SIT, inserting VID in the equation for hydrostatic equilibrium. The algorithm is validated with field, laboratory studies and collocated SIT retrieved from RA on board Envisat. The accuracy of the developed algorithm is analyzed, using statistical and uncertainty analyses. It is found that the uncertainty of the retrieved SIT from LA is decreased 7.6 times (from rhi = 59 cm for fixed ice density) if variable ice density is inserted in the equation for hydrostatic equilibrium. The SIT, which has been retrieved from the freeboard derived from LA is validated with collocated SIT derived from RA2 on Envisat, using variable ice density. The bias of the mean SIT derived from LA and RA has been reduced from -1.1 m to about one millimeter when VID is
Music, Eurocentrism and Identity: The Myth of the Discovery of America in Chilean Music History  [PDF]
Alejandro Vera
Advances in Historical Studies (AHS) , 2014, DOI: 10.4236/ahs.2014.35024
Abstract: During the past century, Edmundo O’Gorman, Tzvetan Todorov, Enrique Dussel and other scholars pointed out the Eurocentric perspective implied in traditional narratives about the discovery of America, most of which intended to confirm Europe as the center of world history and culture. At the same time, Claude Lévi-Strauss, Hayden White and others argued for the mythical character of history. According to them, even though historians attempted to assemble documentary evidence objectively, they constructed their narratives incorporating such evidence in preexisting stories, characters and categories with a mythical origin. This paper uses these viewpoints to analyze and criticize the way in which Chilean music history has been constructed, particularly during the republican era. The main hypothesis is that traditional discourses about that history have constantly recycled narratives on the discovery of America, which thus operates as a kind of founding myth for historical and musicological interpretations, especially when dealing with turning points such as the change of dynasty (1700), the beginning of independence (c. 1810) and the centenary of the republic (1910). A corollary would be that documentary evidence about music has been frequently hidden or distorted precisely in order to fit such a myth. That is why the present paper examines both bibliography and original documents found in different archives.
The Effect of a Mother’s Level of Attachment and Her Emotional Intelligence on a Child’s Health during Its First Year of Life  [PDF]
Elena Nikolaeva, Vera Merenkova
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.45068
Abstract:

The aim of this study was to investigate the possibility of predicting the health of a child during its first year by using the mother’s emotional intelligence and the level of her attachment to the child. Serving as test subjects were 50 mother-child pairs during the first year of life and 50 mother-child pairs during the second year of life (altogether 200 individuals). It was shown that the likelihood of dismissing a diagnosis given to a child at a maternity clinic depends on the level of the mother’s acceptance of the child and not on her emotional intelligence and anxiety.

Sem mágicas solu??es: a preven??o e o cuidado em HIV/ AIDS e o processo de emancipa??o psicossocial
Paiva, Vera;
Interface - Comunica??o, Saúde, Educa??o , 2002, DOI: 10.1590/S1414-32832002000200003
Abstract: this text discusses the need to politicize psycho-educational arenas and presents the idea of a "psycho-social emancipation" as one of the references for improved operationalization of the notion of vulnerability in the field of prevention of new hiv infections and of the organization of care for those who are aids carriers. reflecting on actions designed to encourage patients to take their medication and use condoms, it suggests that the prevention of hiv should overcome models devised for "hiv negative" people and that the prevent-assist continuum should be radicalized. to this end, it is pressing to: take into account the facts accumulated in the field of cultural analyses and of psychosocial research in the planning and organization of preventive actions and of providing assistance to hiv carriers, including, for instance, the ideas of oppressive social construction of two genders, masculine and feminine; overcome the notion of "individuals as consumers" (of services, educational programs, condoms and prescribed medication, of behaviors and safe practices to be practiced); foster the innovation of prevention and care actions. working with the idea of a "subject-citizen individual", co-participant in the psycho-educational arenas whose horizon consists of psychosocial emancipation, can enhance the quality of preventive actions and of integrated care of hiv and aids patients, so as to include "all" brazilians, according to the socio-cultural context of "each one", both men and women, testing positive or negative.
UNA NUEVA ESPECIE DE CHILENOPERLA (PLECOPTERA: GPJPOPTERYGIDAE) Y LAS CONSECUENCIAS TAXONóMICAS DEL DESCUBRIMIENTO DE SU NINFA
Vera,Alejandro;
Gayana (Concepción) , 2008, DOI: 10.4067/S0717-65382008000200005
Abstract: anew species of gripopterygidae (chilenoperla elongata sp. nov.) is described based on adults of both sexes and nymphs from chile. the nymph was associated by means of growing in controlled conditions. the nymph of the new species is similar to that oí pelurgoperla (sensu lilies, 1963). therefore, previous identifications and geographic distributions of these genera could be wrong. comments on the nymph of ch. puerilis are advanced at the light of this new finding.
Una nueva especie de Gripopterygidae de Chile, Potamoperla testacea n. sp. (Insecta: Plecoptera)
Vera,Alejandro;
Gayana (Concepción) , 2006, DOI: 10.4067/S0717-65382006000200003
Abstract: a new species of gripopterygidae: gripopteryginae (sensu mclellan described 1977) from chile potamoperla testacea n. sp. distributed between the seventh and tenth first regions. is both sexes and the nymph are given to know, this last one is associated by means of laboratory emergence. its generic location is discussed.
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