Abstract
Paleoproterozoic massive Cu-Zn±Pb±Au±Ag sulphide deposits metamorphosed to the middle-upper amphibolite facies in central-south Colorado formed in a volcanic arc setting on the edge of the ...Yavapai crustal province. Previously published U-Pb ages on spatially related granitoids range from ∼1.9 to ∼1.1 Ga, while Pb isotope studies on galena from massive sulphides suggest mineralization formed at around 1.8–1.7 Ga. Some deposits in the Dawson-Green Mountain trend (DGMT) and the Gunnison belt are composed of Cu-Zn-Au-(Pb-Ag) mineralization that were overprinted by later Au-(Ag-Cu-Bi-Se-Te) mineralization. Sulphide mineralization is spatially related to amphibolite and bimodal, mafic-felsic volcanic rocks (gabbro, amphibolite, rhyolite and dacite) and granitoids, but it occurs mostly in biotite-garnet-quartz±sillimanite±cordierite schists and gneisses, spatially related to nodular sillimanite rocks, and in some locations, exhalative rocks (iron formations, gahnite-rich rocks and quartz-garnetite). The major metallic minerals of the massive sulphides include chalcopyrite, sphalerite, pyrite, pyrrhotite, and magnetite, with minor galena and gahnite. Altered rocks intimately associated with mineralization primarily consist of various amphiboles (gedrite, tremolite and hornblende), gahnite, biotite, garnet, cordierite, carbonate and rare högbomite. The Zn/Cd ratios of sphalerite (44 to 307) in deposits in the DGMT fall within the range of global volcanogenic massive sulphide (VMS) deposits but overlap with sphalerite from sedimentary exhalative (Sedex) deposits. Sulphur isotope values of sulphides (δ
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S = −3.3 to +6.5) suggest sulphur was largely derived from magmatic sources, and that variations in isotopic values resulting from thermochemical sulphate reduction are due to small differences in physicochemical conditions. The preferred genetic model is for the deposits to be bimodal-mafic (Gunnison) to mafic-siliciclastic VMS deposits (Cotopaxi, Cinderella-Bon Ton, DGMT).
The mitochondrial genome is dwarfed by its neighbour in the nucleus, and, thus, it has been sensible for far more resources to be invested in the study of nuclear, rather than mitochondrial, DNA ...metabolism. Furthermore, few researchers have considered using mitochondrial DNA (mtDNA) as a model system for nuclear DNA metabolism. A quick look into the history of mtDNA provides ready answers as to why this was the case; however, recently mitochondria have been found to contain several nuclear replication and repair factors, so is there any potential to adopt the mitochondrion as a tool to unravel some of the intricacies of replication and repair in higher-order eukaryotes? Perhaps it is now time to invite the Cinderella genome to the ball.
Background/purpose. There exists a desire to provide schoolteachers with mentors. In English schools, school-based mentors are mandatory for schools participating in Initial Teacher Education and the ...Early Career Framework. The purpose of this study is to highlight the need for a professional mentoring capacity within schools without burdening existing teachers' already stretched workload. To that end, a case study of secondary school mathematics teachers acting as early career teacher mentors were interviewed in order to ascertain whether they were officially recognized as school-based mentors. The participants were asked whether they held a title as a mentor, and their responses analyzed and interpreted according to Miles et al.'s (2020) "think display" visualization. Materials/methods. The literature has previously used the "Cinderella" metaphor to describe the role of school-based mentors. This study pursues this analogy to interpret school-based mentors' qualitative responses to juxtapose the metaphor in relation to schoolteacher recruitment and retention coupled to an extrinsic motivating factor to provide school-based teacher mentoring. Seven school-based mentors were interviewed separately within their own practice schools. Audio recordings and transcriptions of the interviews were shared with each respective participant for their approval and to check for accuracy, and each were also given the opportunity to withdraw from the study at every sequence, following the ethics agreement laid out by the researcher's university. The collected data were analyzed according to Miles et al.'s (2020) "think display" technique and a constructivist interpretation following research by Knapp (2019) to integrate theories of mentoring exposed by Kemmis et al. (2014). Results. The study founds that most teachers acting as mentors were extrinsically charged to fulfill the role since their employing school participated in initial and early career teacher provision. None of the participating teachers held a specific title of mentor as reward for their endeavor. This case study consisted of seven participants from seven different schools, and although small, the participant group was homogenous and therefore representative so as to interpret the phenomenon. The findings were then used to make predictions that could affect the success of mentoring programs for teachers. Conclusion. The study intended to add further evidence of the ethnomethodological actions of teacher mentoring in order to create an understanding of the profession in daily life. School teacher mentoring is seen as an effective way to support teachers, but if mentors are not recognized or rewarded the provision is at risk of becoming a cottage industry and unlikely to become common practice without being made mandatory. Governments may have act with good intent, but often their solutions are a one-size-fits-all approach and lack sufficient financial incentive. Teacher recruitment and retention is crucial to a government's education policy and therefore critical that strategies imposed upon teachers do not negatively impact upon their well-being or existing workload. This original case study aims to add to the empirical evidence existing in the field of teacher mentoring. Keywords: Mentor, Cinderella, intrinsic, extrinsic, ancillary
Abstract
The present study intends to examine the link between clothes and cultural identities in Jhumpa Lahiri’s “Hema and Kaushik” (2008). It will argue that Lahiri explores her protagonists’ ...cultural displacement through their items of clothing. We want to suggest that the protagonists’ clothes are employed in each narrative as signifiers for the characters’ cultural identities. The study will further show that each item of clothing could be loaded with the ideological signification of two separate cultures. In other words, it aims to demonstrate how ideology imposes its values, beliefs, and consequently its dominance through the dress codes each defines for its subjects. Moreover, it intends to suggest that the link between clothing and identity is most visible and intense in the case of female immigrant characters rather than men. Drawing on Luptan’s structure of the Cinderella line, we will explore Lahiri’s protagonists’ cultural transformation from simple ethnic girls to stylish American ladies through their items of clothing. The study will conclude that the “Cinderella line” does not work in Lahiri’s realistic stories the way it does in fairy tales and romance fiction.
Temporal variations in the activity of arthropod vectors can dramatically affect the epidemiology and evolution of vector‐borne pathogens. Here, we explore the “Hawking hypothesis”, which states that ...these pathogens may evolve the ability to time investment in transmission to match the activity of their vectors. First, we use a theoretical model to identify the conditions promoting the evolution of time‐varying transmission strategies in pathogens. Second, we experimentally test the “Hawking hypothesis” by monitoring the within‐host dynamics of Plasmodium relictum throughout the acute and the chronic phases of the bird infection. We detect a periodic increase of parasitemia and mosquito infection in the late afternoon that coincides with an increase in the biting activity of its natural vector. We also detect a positive effect of mosquito bites on Plasmodium replication in the birds both in the acute and in the chronic phases of the infection. This study highlights that Plasmodium parasites use two different strategies to increase the match between transmission potential and vector availability. We discuss the adaptive nature of these unconditional and plastic transmission strategies with respect to the time scale and the predictability of the fluctuations in the activity of the vector.
This study looks at the impact of a university making a surprise (“Cinderella”) run in the men’s NCAA basketball tournament. Our results suggest that surprise success in the tournament has little to ...no impact on the quantity of applications in subsequent years. However, we find that freshmen enrollments increase for private schools two academic years after a Cinderella run (with mixed results on the quality of freshmen—although not worse). Given an average private school, with 1,253 freshmen and paid tuition of $24,428 (each year) plus room and board, a Cinderella run is worth approximately $7.3 million in 2012-dollars.
‚Three Wishes for Cinderella‘ (
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) is one of the most successful fairy tale films in Czech and German TV. Produced in 1973, it is shown up to now regularly around Christmas in both countries. Every ...year around the same time, at Moritzburg Castle near Dresden, which has been chosen as place of the ball in the movie, one can see a special Cinderella exhibition. In his paper the author investigates the question of the success of this film. He presents the conditions of the Czech-German joint production during the time of the so called normalisation after the Prague Spring. He compares the story and figures with its literary models (Božena Němcová, Brothers Grimm), and discusses some theories about the modernity of characters, especially of Cinderella as a modern emancipated woman. The core of the paper is the analysis of the narrative structure itself, which may be considered as the secret to the success of the movie.
Conservation biogeography is considered the Cinderella of biological conservation. Nevertheless biogeography provides the basis for establishing species distributions over space and time, therefore ...conservation priorities among areas and individual species. We demonstrate that there is no need to simplify analyses by using subsets of species (rare species, endemics) as surrogates. In doing so, we apply strict biogeographical techniques to determine butterfly impoverishment on three of the west Mediterranean's largest islands (Sardinia, Corsica and Sicily). The analyses performed on species, both collectively and individually, reveal that regional species richness in the Mediterranean zone can be largely predicted by latitude, altitude and latitudinal range (maximum minus minimum latitude), but that Sardinia and Corsica have clearly impoverished faunas. Logistic regression at individual species level demonstrates that several species, predicted to be present in these islands on the basis of their continental distributions, are actually absent. When compared with species that are present in these islands, such missing species are disclosed as having ecological traits which reduce their colonization capability. Probabilities of occurrence are calculated for each species on each island; they reflect the potential for each butterfly species to migrate to and colonise each island, and can be considered as a measure of conservation value. As such, species present on islands but having low immigration probabilities are predicted to represent isolated populations from the mainland that are unlikely to re‐colonize the islands in the case of extinction. Island endemic species and races are shown to have lower occurrence probabilities compared to widespread species occurring on islands and illustrate the usefulness of occurrence probabilities for identifying isolated populations in need of conservation attention.
We illustrate the use of Oshima splines in producing high-quality
output in two cases: first, the numerical computation of derivatives and integrals, and second, the display of silhouettes and ...wireframe surfaces, using the macros package
. Both cases are of particular interest for college and university teachers wanting to create handouts to be used by students, or drawing figures for a research paper. When dealing with numerical computations,
can make a call to the CAS Maxima to check for accuracy; in the case of surface graphics, it is particularly important to be able to detect intersections of projected curves, and we show how to do it in a seamlessly manner using Oshima splines in
. A C compiler can be called in this case to speed up computations.
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