106 research outputs found
Deep Thoughts: A Look at Public Access to Deepwater Sites through the Mardi Gras Shipwreck
No full textIn late 2006, the Florida Public Archaeology Network (FPAN) was asked by the Minerals Management Service to direct the public outreach and education component of the Mardi Gras Shipwreck Project. Traditional public outreach efforts for archaeological sites in shallow water typically focus on getting diving and snorkeling visitors to the site. Interpretive materials for such sites often include waterproof site plans, submerged markers, and guidelines to direct visitors around the site as they explore and learn. Deepwater archaeological sites present unique challenges, namely, the interpretation of resources managed for the public that the public will never physically visit. This article discusses FPAN’s role in the Mardi Gras Shipwreck Project and the public education strategies developed to present the shipwreck and the extreme deepwater project to the public.Journal ArticlePublishe
Table_1_Opium abuse and stroke in Iran: A systematic review and meta-analysis.docx
No full textIntroductionOpium dependence is a significant health concern in low and middle-income countries, leading to a considerable number of deaths annually. Opium has several detrimental effects on its consumers. Data regarding the impact of opium on stroke are controversial. The objective of this study is to evaluate the association between opium dependence and stroke.MethodsI conducted a systematic search based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines to evaluate the association between opium dependence and stroke. Following the extraction of qualitative findings from included studies, a meta-analysis was performed to assess the pooled estimate of odds ratios (ORs).ResultsEight and four studies were included in qualitative and quantitative synthesis, respectively. Opium dependence increases the hazard of stroke mortality. Also, opium increases the odds of ischemic stroke by 127% (pooled OR = 2.27, 95% CI: 1.47–3.07).ConclusionOpium not only merely increases the odds of being diagnosed with ischemic stroke but also leads to a notable increase in the mortality rate following stroke.</p
The relationship between farm size and productivity: empirical evidence from the Nepalese mid-hills
No full textThis paper examines the farm size and productivity relationship using data from Nepalese mid hills. The household data used has been drawn from a survey conducted by the author and financed by the Norwegian University of Life Science. The analysis uses models both allowing for and not allowing for village dummies(as cluster controls), the ratio of irrigated land (as proxy for land quality), and other socio-economic variables such as households, belonging to caste groups, and family size (as proxy for access to resources). The result supported the almost ‘stylized fact’ of inverse relationship (IR) between farm size and output per hectare. Total cash input use and labour hours per hectare were found to be higher on small farms. The findings of regression equations allowing for village dummies and other socio-economic variables do not support the explanation that the IR between farm size and productivity is due to variation in regions as well as access to resources. Nevertheless, family size and caste dummies show some effects on farm value added. The paper further investigates returns to scale in Nepalese agriculture, applying the Cobb-Douglas (CD) production function. The result shows constant returns to scale. Labour input seems more influential in farm production, followed by manure, in the sample farms. The overall result shows that the IR between farm size and output per hectare is perhaps due to the result more of other inputs used by small farms rather than diseconomies of scale.inverse relationship; farm size; productivity; returns to scale; Nepal
Parade zouloue et carnaval indien, un Mardi gras différent à La Nouvelle-Orléans
No full textLe Carnaval de La Nouvelle-Orléans est un moment privilégié pour les touristes comme pour les résidents de la ville. Cette période de fêtes et de parades est devenue une attraction touristique majeure en Amérique du Nord. L’article présente deux formes méconnues de ce Mardi gras : la parade zouloue et le carnaval indien. Après en avoir retracé l’origine, l’auteure analyse les pratiques festives des deux communautés afro-américaines. Derrière une image simplifiée offerte aux touristes se jouent des réalités sociologiques différentes. Chacune des deux communautés cherche, à sa manière, à s’illustrer dans la société américaine en étalant une authenticité vernaculaire.The New Orleans Mardi Gras Carnival is a high point for tourists as well as locals. This period of parties and parades is a major tourist attraction in North America. The article presents two less well-known aspects of Mardi Gras, the Zulu Parade and the Indian Carnival. After tracing the origins of these two events, the author looks at festive practices in these two African American communities. The simplified image offered to the tourist covers different sociological realities. Each group attempts, in its own way, to assert its importance for American society through the authenticity of its traditions
The relationship between farm size and productivity: empirical evidence from the Nepalese mid-hills
No full textThis paper examines the farm size and productivity relationship using data from Nepalese mid hills. The household data used has been drawn from a survey conducted by the author and financed by the Norwegian University of Life Science. The analysis uses models both allowing for and not allowing for village dummies(as cluster controls), the ratio of irrigated land (as proxy for land quality), and other socio-economic variables such as households, belonging to caste groups, and family size (as proxy for access to resources). The result supported the almost âstylized factâ of inverse relationship (IR) between farm size and output per hectare. Total cash input use and labour hours per hectare were found to be higher on small farms. The findings of regression equations allowing for village dummies and other socio-economic variables do not support the explanation that the IR between farm size and productivity is due to variation in regions as well as access to resources. Nevertheless, family size and caste dummies show some effects on farm value added. The paper further investigates returns to scale in Nepalese agriculture, applying the Cobb-Douglas (CD) production function. The result shows constant returns to scale. Labour input seems more influential in farm production, followed by manure, in the sample farms. The overall result shows that the IR between farm size and output per hectare is perhaps due to the result more of other inputs used by small farms rather than diseconomies of scale.inverse relationship, farm size, productivity, returns to scale, Nepal, Q15, O13, Farm Management,
Electroencéphalographie et interfaces cerveau-machine : nouvelles méthodes pour étudier les états mentaux
No full textAvec les avancées technologiques dans le domaine de l'imagerie cérébrale fonctionnelle et les progrès théoriques dans la connaissance des différents éléments neurophysiologiques liés à la cognition, les deux dernières décennies ont vu l'apparition d'interfaces cerveau-machine (ICM) permettant à une personne d'observer en temps réel, ou avec un décalage qui se limite à quelques secondes, sa propre activité cérébrale. Le domaine clinique en général, et plus particulièrement celui de la neuropsychologie et des pathologies conduisant à un handicap moteur lourd, pour lesquels les applications potentielles sont nombreuses qu'elles soient thérapeutiques ou en vue d'une réhabilitation fonctionnelle, a constitué un moteur important de la recherche sur ce nouveau domaine des neurosciences temps réel. Parmi ces applications, le neurofeedback, ou neurothérapie, qui vise l'acquisition par le sujet du contrôle volontaire de certains aspects de son activité cérébrale en vue de les amplifier ou au contraire les diminuer dans un but thérapeutique, voire d'optimisation cognitive, représente une technique prometteuse, alternative aux thérapies et traitements médicamenteux. Cependant, la validation de ce type d'intervention et la compréhension des mécanismes mis en jeux en sont encore à leurs balbutiements. L'entraînement par neurofeedback est souvent long, pouvant s'étaler sur plusieurs semaines. Il est donc très probable que ce type de rééducation cérébrale sollicite des phénomènes de plasticité qui s'inscrivent dans une dynamique lente, et de ce fait, requiert une durée relativement longue d'entraînement pour atteindre les effets à long terme recherchés. Cependant, à cela peuvent s'ajouter de nombreux éléments perturbateurs qui pourraient être à l'origine de la difficulté de l'apprentissage et des longs entraînements nécessaires pour obtenir les résultats attendus. Parmi eux, les perturbations qui viennent déformer le signal enregistré, ou les éléments artefactuels qui ne font pas partie du signal d'intérêt, sont une première cause potentielle. Le manque de spécificité fonctionnelle du signal retourné au sujet pourrait en constituer une deuxième. Nous avons d'une part développé des outils méthodologiques de traitement du signal en vue d'améliorer la robustesse des analyses des signaux EEG, principalement utilisés jusqu'à maintenant dans le domaine du neurofeedback et des ICM, face aux artefacts et au bruit électromagnétique. D'autre part, si l'on s'intéresse au problème de la spécificité fonctionnelle du signal présenté au sujet, des études utilisant l'IRM fonctionnelle ou des techniques de reconstruction de sources à partir du signal EEG, qui fournissent des signaux ayant une meilleure spécificité spatiale, laissent entrevoir de possibles améliorations de la vitesse d'apprentissage. Afin d'augmenter la spécificité spatiale et la contingence fonctionnelle du feedback présenté au sujet, nous avons étudié la stabilité de la décomposition de l'EEG en différentes sources d'activité électrique cérébrale par Analyse en Composantes Indépendantes à travers différentes séances d'enregistrement effectuées sur un même sujet. Nous montrons que ces décompositions sont stables et pourraient permettre d'augmenter la spécificité fonctionnelle de l'entraînement au contrôle de l'activité cérébrale pour l'utilisation d'une ICM. Nous avons également travaillé à l'implémentation d'un outil logiciel permettant l'optimisation des protocoles expérimentaux basés sur le neurofeedback afin d'utiliser ces composantes indépendantes pour rejeter les artefacts en temps réel ou extraire l'activité cérébrale à entraîner. Ces outils sont utiles dans le cadre de l'analyse et de la caractérisation des signaux EEG enregistrés, ainsi que dans l'exploitation de leurs résultats dans le cadre d'un entraînement de neurofeedback. La deuxième partie de ce travail s'intéresse à la mise en place de protocoles de neurofeedback et à l'impact de l'apprentissage. Nous décrivons tout d'abord des résultats obtenus sur une étude pilote qui cherche à évaluer chez des sujets sains l'impact d'un protocole de neurofeedback basé sur le contrôle du rythme Mu. Les changements comportementaux ont été étudiés à l'aide d'un paradigme de signal stop qui permet d'indexer les capacités attentionnelles et d'inhibition de réponse motrice sur lesquelles on s'attend à ce que l'entraînement ICM ait une influence. Pour clore cette partie, nous présentons un nouvel outil interactif immersif pour l'entraînement cérébral, l'enseignement, l'art et le divertissement pouvant servir à évaluer l'impact de l'immersion sur l'apprentissage au cours d'un protocole de neurofeedback. Enfin, les perspectives de l'apport des méthodes et résultats présentés sont discutées dans le contexte du développement des ICMs de nouvelle génération qui prennent en compte la complexité de l'activité cérébrale. Nous présentons les dernières avancées dans l'étude de certains aspects des corrélats neuronaux liés à deux états mentaux ou classes d'états mentaux que l'on pourrait qualifier d'antagonistes par rapport au contrôle de l'attention : la méditation et la dérive attentionnelle, en vue de leur intégration à plus long terme dans un entraînement ICM par neurofeedback.With new technological advances in functional brain imaging and theoretical progress in the knowledge of the different neurophysiologic processes linked to cognition, the last two decades have seen the emergence of Brain-Machine Interfaces (BCIs) allowing a person to observe in real-time, or with a few seconds delay, his own cerebral activity. Clinical domain in general, and more particularly neuropsychology and pathologies leading to heavy motor handicaps, for which potential applications are numerous, whether therapeutic or for functional rehabilitation, has been a major driver of research on this new field of real-time neurosciences. Among these applications, neurofeedback, or neurotherapy, which aims the subject to voluntary control some aspects of his own cerebral activity in order to amplify or reduce them in a therapeutic goal, or for cognitive optimization, represents a promising technique, and an alternative to drug treatments. However, validation of this type of intervention and understanding of involved mechanisms are still in their infancy. Neurofeedback training is often long, up to several weeks. It is therefore very likely that this type of rehabilitation is seeking brain plasticity phenomena that are part of slow dynamics, and thus require a relatively long drive to achieve the desired long-term effects. However, other disturbing elements that could add up to the cause of the difficulty of learning and long training sessions required to achieve the expected results. Among them, the disturbances that come from recorded signal distortions, or artifactual elements that are not part of the signal of interest, are a first potential cause. The lack of functional specificity of the signal returned to the subject could be a second one. We have developed signal processing methodological tools to improve the robustness to artifacts and electromagnetic noise of EEG signals analysis, the main brain imaging technique used so far in the field of neurofeedback and BCIs. On the other hand, if one looks at the issue of functional specificity of the signal presented to the subject, studies using functional MRI or source reconstruction methods from the EEG signal, which both provide signals having a better spatial specificity, suggest improvements to the speed of learning. Seeing Independent Component Analysis as a potential tool to increase the spatial specificity and functional contingency of the feedback signal presented to the subject, we studied the stability of Independent Component Analysis decomposition of the EEG across different recording sessions conducted on the same subjects. We show that these decompositions are stable and could help to increase the functional specificity of BCI training. We also worked on the implementation of a software tool that allows the optimization of experimental protocols based on neurofeedback to use these independent components to reject artifacts or to extract brain activity in real-time. These tools are useful in the analysis and characterization of EEG signals recorded, and in the exploitation of their results as part of a neurofeedback training. The second part focuses on the development of neurofeedback protocols and the impact of learning. We first describe the results of a pilot study which seeks to evaluate the impact of a neurofeedback protocol based on the Mu rhythm control on healthy subjects. The behavioral changes were studied using a stop signal paradigm that indexes the attentional abilities and inhibition of motor responses on which the BCI training can possibly have influence. To conclude this section, we present a new tool for immersive interactive brain training, education, art and entertainment that can be used to assess the impact of immersion on learning during a neurofeedback protocol. Finally, prospects for methods and results presented are discussed in the context of next-generation BCI development which could take brain activity complexity into account. We present the latest advances in the study of certain aspects of the neural correlates associated with two mental states or classes of mental states that could be described as antagonistic with respect to the control of attention: meditation and mind wandering, for their integration in the longer term in an BCI training using neurofeedback
Congenital Bladder and Urethral Agenesis: Two Case Reports and Management
No full textBackground. Agenesis of the bladder and urethra is a rare congenital anomaly, with a very few living cases reported in the literature so far. Case Presentation. We are reporting two female patients (3 and 6 years old) with bladder and urethral agenesis who presented with urinary incontinence. In both patients, magnetic resonant imaging (MRI) revealed a case of bladder and urethral agenesis with normal ureters draining into the vagina. Patients underwent a neobladder and conduit creation surgery. The neobladder was constructed from the whole cecum and a part of the ascending colon, followed by an anastomose of the ureters into the neobladder in a nonrefluxing fashion; the appendix was used simultaneously as a continent catheterizable conduit. The two patients attained urinary continence postoperatively. Conclusion. We reported two cases of bladder agenesis, and for the first time, we have performed neobladder creation surgery using the cecum and ascending colon. One-year follow-up did not reveal any complications
Not Helping the Cause. "The Snow Queen" by Mardi McConnochie. [review]
No full textWhen Armstrong was about ten, she used to devour the books of an English children's author named Noel Streatfield. The most famous was called "Ballet Shoes", which took young antipodeans onto the stage and into the wings of another world, the London theatre scene. Galina Koslova, a Russian-born émigrée to South Australia and the heroine of "The Snow Queen", gives "Ballet Shoes" to a step-granddaughter, correctly designating it a classic. Armstrong wonders whether Mardi McConnochie’s novel was designed to fill the gap left on adult bookshelves by long-abandoned copies of "Ballet Shoes", even if our reading requirements have matured.Australia Council, La Trobe University, National Library of Australia, Holding Redlich, Arts Victori
Teaching Writers How to Write
No full textAnna Keesey, acclaimed author of Little Century, shares her knowledge and gift for language with budding young authors
Good teaching? An examination of culturally relevant pedagogy as an equity practice
No full textThe adoption of educational policy measures to close the achievement gap, as well as the significant amount of scholarship dedicated to the subject, are just some of the indicators that reflect the tremendous concern in education about the academic performance of stu-dents of colour. Within research aimed at promoting equitable practices in education, culturally relevant teaching has emerged as a good teaching strategy to improve achieve-ment. Using genealogical methods to examine the ways in which culture has become rel-evant to classroom practice, the author argues that that the perceived difference from white students that made it possible to conceive of children of colour as culturally deficit in the 1960s is also invoked in more recent literature that promotes attending to culture as an equity strategy. The take-up of culturally relevant teaching as something that a teacher can ‘do’, instead of a critical stance that a teacher takes, is also examined and critiqued
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