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Search Results: 1 - 10 of 38755 matches for " Ana Carolina Gravena;Barham "
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Após a licen?a maternidade: a percep??o de professoras sobre a divis?o das demandas familiares
Vanalli, Ana Carolina Gravena;Barham, Elizabeth Joan;
Psicologia & Sociedade , 2012, DOI: 10.1590/S0102-71822012000100015
Abstract: in this study, we investigated the experiences of school teachers returning from a maternity leave, examining the division of tasks with her partner as well as her satisfaction with her own and her partner's family involvement and with her wider social-support network. we interviewed 40 public-school teachers, mothers of children under two years of age, in the state of s?o paulo. the majority of the participants related spending double the time spent by their partners on domestic chores and childcare, assuming more high-frequency tasks, performed at fixed times. in general, the respondents were satisfied with their own family involvement, although 65% wanted to spend more time with their children. they evaluated their partner's family involvement as being good, but systematically lower than their own. many used other sources of support, which were evaluated positively. nonetheless, the respondents were overloaded, pointing to the need to reorganize the division of family work.
Envolvimento materno e desempenho acadêmico: comparando crian?as residindo com a m?e e com ambos os pais
Costa, Carolina Severino Lopes da;Cia, Fabiana;Barham, Elizabeth Joan;
Psicologia Escolar e Educacional , 2007, DOI: 10.1590/S1413-85572007000200012
Abstract: this study aimed to compare maternal involvement among children living with their mother or with both parents and the academic performance of children in these two family contexts and correlate the frequency of the mother's involvement with their child's academic performance. the 30 children who participated in this study ranged in age from 9 to 11 years, studying in the third or fourth grade, with half living in single-parent families and half living with both parents. the academic achievement test (aat) was used to evaluate the children's academic performance. the questionnaire on the quality of family interactions - child version captured maternal involvement. results showed that there were several significant differences between the two children's groups, in terms of their mothers' involvement. in addition, maternal involvement in the single parent group showed a much stronger relationship with the children's academic performance than in the two parent groups.
Two-Part Tariff Lottery: A Means to Provide Public Good at the Social Optimum  [PDF]
Amornrat Apinunmahakul, Vicky Barham
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.21006
Abstract: Pure public goods provided by charitable organizations may be provided at the first-best level when the provision is financed by an appropriately designed lottery. If lottery tickets are sold using a two-part tariff, the level of provision of the public good is greater than when fees are not charged to participate in the lottery. Unlike [13] who asymptotically approach the first-best level of provision with an arbitrarily large prize, a Pareto efficient level of the public good is produced when participation fees for the lottery are set appropriately.
Strategic Interaction and Charitable Fundraising  [PDF]
Amornrat Amornrat Apinunmahakul, Vicky Barham
Modern Economy (ME) , 2012, DOI: 10.4236/me.2012.33044
Abstract: This paper studies strategic interaction between rival charities providing multiple public goods, highlighting the role of fundraising campaigns in influencing donor decision-making. The analysis suggests that, even when charities honor donor designation, social welfare may be higher in equilibrium when charities solicit donors sequentially, rather than simultaneously or through a United Fund.
Clarifying Some Fundamental Errors in Herries' “A Chronological Perspective on the Acheulian and Its Transition to the Middle Stone Age in Southern Africa: The Question of the Fauresmith” (2011)
Lawrence Barham
International Journal of Evolutionary Biology , 2012, DOI: 10.1155/2012/230156
Abstract: Herries provides a timely review of the archaeological and dating evidence of the transition from the Acheulean to the Middle Stone Age (MSA) in southern Africa, however, in relation to the site of Twin Rivers, Zambia he makes several fundamental errors of interpretation that demand correction. The stratigraphic sequence of the site is admittedly complex, but it deserves a more careful analysis than that offered by Herries. This detailed response by the most recent excavator of the site addresses Herries critique by placing the site in its historical context and then dealing with the central issue of the association of dated speleothem with the surviving archaeological deposits. Herries is shown to have mistakenly combined the dates from two separate cave passages and to have misunderstood the published sections, plans, and taphonomic assessment of each excavation area. His reinterpretation of the site as being significantly younger than published is based on a conflation of unrelated data. 1. The Twin Rivers Review Herries ([1, page 11]?) reanalyses the published data from the most recent excavations at Twin Rivers and argues that there is considerable uncertainty about the age of the deposits and as a consequence about the significance of the site. He concludes that the sequence may be significantly younger than claimed and makes the general observation that “Excavators need to be extremely careful when relating fragments of flowstone to wider archaeological deposits in caves due to their complex depositional history…. Often dates are presented without any information regarding their reliability or context” ([1, page 11]). As the archaeologist responsible for the most recent research at Twin Rivers, I concur with these comments. Herries, however, in the case of Twin Rivers has misunderstood the stratigraphic sequence of the site and unwittingly conflated dates from unrelated deposits. He has also overlooked our critical assessment of the reliability of the association of the dated material with the archaeological deposits. His resulting reinterpretation throws considerable doubt on the integrity of the published association of dates with the deposits excavated in 1999. According to Herries his concerns are shared more widely: “….many researchers are sceptical over the association of the flowstone to the MSA bearing deposits.” If this is indeed the case [no sources are cited] then this uncertainty needs to be discussed in detail so that the reader can assess the validity of the critique. A brief history of the excavations provides the context for
Physics in the kitchen
Peter Barham
Flavour , 2013, DOI: 10.1186/2044-7248-2-5
Abstract: During the meal, as we eat we note how good the food is, where there is room for improvement and what is particularly liked. In effect we analyse the results of the experiment – the good scientific cook will keep notes of these discussions and use them to draw preliminary conclusions about how to improve the recipe. After several more tests of the recipe, we may then begin to derive a model to explain our results and to understand how and why making small changes to the recipe produces different qualities in the final dish – we can then use that understanding and apply it to other recipes, so continually improving our cooking skills.This is nothing more than the application of the scientific method to cookery – simple but highly effective. If taken seriously and applied properly there is no excuse for any scientifically trained person not to become a superb cook.But is there more to physics in the kitchen than ensuring physicists are good cooks? Can physics help chefs with no scientific background improve their own cooking? Is this really an area that is worth the attention of serious physicists? Is there new physics to be learned from the study of gastronomy? My unsurprising opinion is that there is good physics to be learned in the kitchen and that investigating the science of cooking is a worthwhile academic pursuit – but of course I would believe that as I have been doing it for more than 25 years now. So perhaps it is time to examine more critically whether it is indeed a worthwhile occupation.One of the most basic kitchen operations is to heat food to change its texture or chemical make-up (or both). To ensure some degree of consistency between cooks there is a need to have some assurance that the temperatures used in different kitchens are closely similar (if not the same). Without the use of expensive scientific equipment the only easy way is to use a phase transition that occurs at a fixed temperature – and the simplest and most accessible of these is to us
Note on Representing $\aleph_0$-categorical Linear Orders
Robert Barham
Mathematics , 2015,
Abstract: These notes find a canonical representation of the $\aleph_0$-categorical linear orders based on Joseph Rosenstein's description. A unique minimal representation, called the normal form, is obtained.
Automatic Homeomorphicity of Locally Moving Clones
Robert Barham
Mathematics , 2015,
Abstract: We extend the work of M. Rubin on locally moving groups to clones, showing that a locally moving polymorphism clone has automatic homeomorphicity with respect to the class of all polymorphism clones. We show that if $\mathrm{Pol}(M,\mathcal{L})$ is a reduct of $(\mathbb{Q},<)$, $(\mathbb{L},C)$ or $(\mathbb{P},<)$ such that: i) $\mathrm{Aut}(M,\mathcal{L}) \not= \mathrm{Aut}(M,=)$, and ii) $\mathrm{Emb}(M,\mathcal{L}) = \mathrm{End}(M,\mathcal{L})$, then $\mathrm{Pol}(M,\mathcal{L})$ is locally moving, where $\mathbb{Q}$ is the rationals, $(\mathbb{L},C)$ is the infinite binary-branching homogeneous $C$-relation, and $(\mathbb{P},<)$ is the random partial order.
The Reconstruction of Cycle-free Partial Orders from their Abstract Automorphism Groups I : Treelike CFPOs
Robert Barham
Mathematics , 2015,
Abstract: In this triple of papers, we examine when two cycle-free partial orders can share an abstract automorphism group. This question was posed by M. Rubin in his memoir concerning the reconstruction of trees. In this first paper, we give a variety of conditions that guarantee when a CFPO shares an automorphism group with a tree. Some of these conditions are conditions on the abstract automorphism group, while some are one the CFPO itself. Some of the lemmas used have corollaries concerning the model theoretic properties of a CFPO.
The Reconstruction of Cycle-free Partial Orders from their Abstract Automorphism Groups II : Cone Transitive CFPOs
Robert Barham
Mathematics , 2015,
Abstract: In this triple of papers, we examine when two cycle-free partial orders can share an abstract automorphism group. This question was posed by M. Rubin in his memoir concerning the reconstruction of trees. In this middle paper, we adapt a method used by Shelah in \cite{ShelahPermutation} and \cite{ShelahPermutationErrata}, and by Shelah and Truss in \cite{ShelahTrussQuotients} to define a cone transitive CFPO inside its automorphism group using the language of group theory.
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