Napalm and After: The Politics of Grace Paley's Short Fiction

Comparatively few contemporary writers have accompanied American POWs home from Hanoi, been arrested on the White House Lawn, or been dragged off in shackles to serve time in the Greenwich Village Women's House of Detention. Paley's pacifist, socialist politics are also deeply rooted in a family past where memories were still fresh of Tsarist oppression - one uncle shot dead carrying the red flag, and parents who reached America only because the Tsar had a son and amnestied all political prisoners under the age of twenty-one. At this point, Paley's father (imprisoned in Archangel) and her mother (in exile) took their chances (and all their surviving relatives) and very sensibly ran for their lives. Her grandmother recalled family arguments around the table between Paley's father (Socialist), Uncle Grisha (Communist), Aunt Luba (Zionist), and Aunt Mira (also Communist). Paley's own street-wise adolescence involved the usual teenage gang fights, between adherents of the Third and Fourth Internationals. This article is copyright MHRA 2001, and is included in this repository with permission.

A supervisão pedagógica promotorade práticas reflexivas na escola atual : um estudo de caso

Dissertação apresentada para a obtenção do grau de Mestre em Ciências da Educação na área de Supervisão e Orientação Pedagógica

Cedar Point Chaussee

This pictures shows a stream of automobiles making their was down the Cedar Point Chaussee (Chaussee is French for a paved road.) Realizing that access to Cedar Point by the automobile was an essential to the park's success, owner George Boeckling built a road that ran the length of the Cedar Point peninsula. This was a distance of seven miles, beginning at U.S. Route 6 to the entrance of Cedar Point.

Increase in Hippocampal Theta Oscillations during Spatial Decision Making

The processing of spatial and mnemonic information is believed to depend on hippocampal theta oscillations (5–12 Hz). However, in rats both the power and the frequency of the theta rhythm are modulated by locomotor activity, which is a major confounding factor when estimating its cognitive correlates. Previous studies have suggested that hippocampal theta oscillations support decision-making processes. In this study, we investigated to what extent spatial decision making modulates hippocampal theta oscillations when controlling for variations in locomotion speed. We recorded local field potentials from the CA1 region of rats while animals had to choose one arm to enter for reward (goal) in a four-arm radial maze. We observed prominent theta oscillations during the decision-making period of the task, which occurred in the center of the maze before animals deliberately ran through an arm toward goal location. In speed-controlled analyses, theta power and frequency were higher during the decision period when compared to either an intertrial delay period (also at the maze center), or to the period of running toward goal location. In addition, theta activity was higher during decision periods preceding correct choices than during decision periods preceding incorrect choices. Altogether, our data support a cognitive function for the hippocampal theta rhythm in spatial decision making

Yousuf Karshin ja Santeri Levaksen valokuvamuotokuvat Jean Sibeliuksesta

Pro gradu -tutkielmani tutkimuskeskiöön sijoittuu suomalainen, kansalliseksi merkki-henkilöksi muodostunut säveltäjä Jean Sibelius ja hänen taiteilijakuvansa. Pitkän elä-mänsä aikana Sibeliuksesta tehtiin lukuisia muotokuvia, joista jokainen sukupolvi 1800-luvun lopulta lähtien on muodostanut oman mielikuvansa Sibeliuksesta. Mie-lenkiintoni kohdistuu tämän melko laajasti tunnistetun Sibelius-kuvan tarkasteluun 1940-luvulla armenialais-kanadalaisen valokuvaaja Yousuf Karshin ja suomalaisen kirjailija-harrastajavalokuvaaja Santeri Levaksen ottamien valokuvamuotokuvien väli-tyksellä. Tutkimusaineistoni koostuu Yousuf Karshin sekä Santeri Levaksen Jean Sibeliuksesta ottamista valokuvamuotokuvista. Karsh on tiettävästi julkaissut vain kolme Sibeliuk-sesta ottamaansa mustavalkoista valokuvaa, jotka hän valokuvasi kesällä 1949 Sibe-liuksen kotona Ainolassa, Järvenpäässä. Kuvat muodostavat tutkimukseni pääaineis-ton. Vertailuaineistonani toimii kolme Santeri Levaksen, kirjoittamassaan elämäkerta-teoksessa Jean Sibelius ja hänen Ainolansa (1945) julkaisemaa Sibeliuksen valoku-vamuotokuvaa. Valokuvamuotokuvia ja valokuvaajia ei ole aiemmin laajasti tutkittu, joten tutkimuksessani esittelen lyhyesti valokuvaajat, heidän taiteellisia intentioita ja analysoin valokuvamuotokuvia kuvarakenteellisesti sekä sisällöllisesti. Jean Sibeliuksesta välitetty taiteilijakuva 1900-luvun alussa miellettiin yleisesti anka-ran oloiseksi, kurttuotsaiseksi hyllyn päälle kuuluneeksi marmoripääksi. Toisen maa-ilman sodan jälkeen ko. taiteilijakuva koettiin liian rajoittavaksi, jolloin heräsi toive Sibelius-kuvan tietoisesta muuttamisesta lempeämmäksi. Tutkimuksessani tarkastelen Sibeliuksen valokuvamuotokuvia itsenäisinä valokuvina, mutta myös esimerkkeinä sodan jälkeisestä Sibelius-kuvasta, tehden vertailua niiden esittämien taiteilijakuvien välillä. Valokuvamuotokuvien tarkastelu sijoittuu osaksi valokuva- ja muotokuvatutkimusta, jonka puitteissa on tarkasteltava valokuvien totuuden diskurssin, representaation ja esityskonventioiden tulkintoja ajan- ja paikan kontekstissa. Nämä myös vaikuttavat kuvissa esiintyvän/esitetyn henkilön tulkintaan, jonka vuoksi tarkastelen niiden aset-tamia vaateita Sibelius-valokuvamuotokuvien välittämää Sibelius-kuvaa analysoides-sani. Tutkimukseni perusteella molemmat valokuvaajista onnistuivat muotokuvillaan luomaan uudenlaisen, perinteistä Sibelius-kuvaa uudistavan taiteilijakuvan.

Les armes de jet d’Argilos : catalogue typologique

Quelques sites archéologiques comme Olympie, Stymphalos et Olynthe possèdent respectivement un répertoire faisant l’étude des armes de jet retrouvées durant une série de campagnes de fouilles archéologiques. Parmi ces indexes, figurent fréquemment des pointes de flèche, des balles de fronde et des saurotères (contrepoids de lance ou de javelot) provenant de différentes périodes historiques gréco-romaines. À travers les 20e et 21e siècle de notre ère, des spécialistes comme D. Robinson (1931), A. Snodgrass (1964), H. Baitinger (2001), C. Hagerman (2014) dédièrent une partie de leur expertise pour produire des synthèses sur ces objets jadis négligés. Ainsi, ils parvinrent à créer de grandes encyclopédies commentées composées de projectiles retrouvés en sol grec. À l’aide de ces bases de données, les archéologues militaires sont en mesure d’établir des datations et l’origine prétendue de certains types de projectiles. Jusqu’en 2015, les artéfacts militaires trouvés sur le site archéologique d’Argilos n’avaient jamais fait l’objet d’une étude de synthèse. D’abord, inspiré par de publications semblables, ces projectiles furent soumis à un inventaire sous forme de catalogue. Au total, deux types de balles de fronde en plomb, onze types de pointes de flèche et un type de saurotère furent identifiés. Finalement, ce nouveau contenu fut assujetti à des analyses comparatives avec d’autres sites archéologiques possédant des données similaires. Les conclusions découlant de ces analogies donnèrent naissance à la première typologie des armes de jet argilienne. Certes, les analyses se heurtèrent à certains obstacles, notamment à une compréhension de la quasi-inexistence d'une pointe de flèche typiquement "grecque" et à la confusion systématique quant à la distinction entre un saurotère et une pointe de javelot, voire possiblement un carreau de gastraphétès (une sorte d’arbalète imposante utilisée lors de sièges durant le 4e siècle av. J.-C.). En partie, ceci découle de l'historique d'échanges entre la Grèce et les autres peuples méditerranéens, balkaniques et orientaux. En outre, de nombreuses réformes militaires des périodes archaïque et classique provoquèrent une évolution constante sur les aspects stratégiques et les tactiques militaires. Considérant ces facteurs parmi tant d'autres et le fait qu'Argilos ait été une fondation grecque en territoire thraco-macédonien, la possibilité d'influence "étrangère" devient alors prépondérante sur la typologie des projectiles argiliens publiée dans le présent mémoire. Avec beaucoup d’espoir, nous croyons sans équivoque que ce travail de recherche contribuera grandement non seulement à l’histoire d’Argilos, mais aussi à l’étude des projectiles en Grèce du nord.

COMPRESSIVE QUANTIZATION FOR SCALABLE CLOUD RADIO ACCESS NETWORKS

With the proliferation of new mobile devices and applications, the demand for ubiquitous wireless services has increased dramatically in recent years. The explosive growth in the wireless traffic requires the wireless networks to be scalable so that they can be efficiently extended to meet the wireless communication demands. In a wireless network, the interference power typically grows with the number of devices without necessary coordination among them. On the other hand, large scale coordination is always difficult due to the low-bandwidth and high-latency interfaces between access points (APs) in traditional wireless networks. To address this challenge, cloud radio access network (C-RAN) has been proposed, where a pool of base band units (BBUs) are connected to the distributed remote radio heads (RRHs) via high bandwidth and low latency links (i.e., the front-haul) and are responsible for all the baseband processing. But the insufficient front-haul link capacity may limit the scale of C-RAN and prevent it from fully utilizing the benefits made possible by the centralized baseband processing. As a result, the front-haul link capacity becomes a bottleneck in the scalability of C-RAN. In this dissertation, we explore the scalable C-RAN in the effort of tackling this challenge. In the first aspect of this dissertation, we investigate the scalability issues in the existing wireless networks and propose a novel time-reversal (TR) based scalable wireless network in which the interference power is naturally mitigated by the focusing effects of TR communications without coordination among APs or terminal devices (TDs). Due to this nice feature, it is shown that the system can be easily extended to serve more TDs. Motivated by the nice properties of TR communications in providing scalable wireless networking solutions, in the second aspect of this dissertation, we apply the TR based communications to the C-RAN and discover the TR tunneling effects which alleviate the traffic load in the front-haul links caused by the increment of TDs. We further design waveforming schemes to optimize the downlink and uplink transmissions in the TR based C-RAN, which are shown to improve the downlink and uplink transmission accuracies. Consequently, the traffic load in the front-haul links is further alleviated by the reducing re-transmissions caused by transmission errors. Moreover, inspired by the TR-based C-RAN, we propose the compressive quantization scheme which applies to the uplink of multi-antenna C-RAN so that more antennas can be utilized with the limited front-haul capacity, which provide rich spatial diversity such that the massive TDs can be served more efficiently.

Cooperative learning and its influences on the diminishing of the digital divide

Digital divide is an issue that concerns our technology dominated society. The parents of ubiquitous computing dreamt of a total proliferation of information technology. But the reality we live in is not yet prepared for this future. There is current a need to develop programs in order to diminish this difference between the digitally included and the excluded one. PROEJA-Transiarte is a project ran by Universidade de Brasília in the city of Ceilândia, Federal District of Brazil. It proposes a different approach on the issue of digital divide, by introducing the cooperative creation of cyberart, based on the life stories of each participant, into the regular curriculum of EJA (Educação de Jovens e Adultos) classes, thus implementing the concept of solidary education. This research project investigated the role played by the cooperative learning the students put in practice during the workshops of the project in the diminishing of the digital exclusion a great part of the students feel. It looked into their activities, analyzing the development of their cooperation, putting it next in the context of the digital and social inclusion. After a multi-dimensional research on the theme, in the context of PROEJA-Transiarte, the conclusion shows the impact cooperative learning has in the reduction of the digital divide, analyzing the perception of the currently involved students, the researchers active in the project, or the former students that had their lives improved because of the workshops they participated in.

Relatório de estágio de intervenção comunitária

Numa sociedade cada vez mais envelhecida, em que o aumento da necessidade de apoio às pessoas idosas dependentes emerge como um problema prioritário, interrogamo-nos sobre a necessidade de dar mais atenção à prestação de cuidados informais à pessoa idosa dependente em contexto domiciliário. O planeamento em saúde serve como suporte para as mudanças que se pretendem implementar em qualquer contexto ao nível da saúde, oferecendo o acesso a cuidados de qualidade, aprimorando a eficácia e a eficiência de uma forma contínua a cuidadores informais de diferentes realidades. O presente relatório tem como finalidade registar de forma clara e objetiva as atividades realizadas, observadas e proporcionadas pela prática clínica referente ao estágio realizado na comunidade no âmbito do terceiro curso de mestrado em enfermagem com especialização em saúde comunitária da Escola Superior de Saúde de Portalegre. Pretendo ainda através deste relatório, refletir sobre o contributo do mesmo para o meu desenvolvimento pessoal e profissional como futura enfermeira especialista em saúde comunitária. A metodologia seguida neste relatório assim como no estágio realizado foi a metodologia do planeamento em saúde. O estágio decorreu de Setembro de 2013 a Fevereiro de 2014 na UCC de Elvas e posteriormente nos domicílios dos cuidadores informais. Foram inseridos na intervenção dez cuidadores informais e relativamente à satisfação manifestada pelos mesmos acerca da intervenção obteve-se um resultado de 100% que se mostraram muito satisfeitos ou extremamente satisfeitos. Este estágio de intervenção comunitária permitiu-nos adquirir a maioria das competências gerais do enfermeiro especialista assim como as competências específicas do enfermeiro especialista em enfermagem comunitária e de saúde pública definida pela Ordem dos Enfermeiros.

Relatório de Estágio de Intervenção Comunitária

O envelhecimento populacional, bem como a longevidade dos indivíduos são fenómenos relativamente novos no entanto, a sociedade não se encontra preparada para cuidar de todos estes indivíduos. Neste sentido, o envelhecimento torna-se um fenómeno mundial irreversível e inevitável em todos os seres vivos, sendo uma temática emergente para a delineação de políticas de saúde que minimizem as consequências que dele advêm. É, deste modo, que surgem os cuidadores informais, familiares que ficam com idosos dependentes a cargo. O cuidador informal enfrenta no seu quotidiano situações imprevisíveis e sofre perdas de controlo pessoal que vão provocar alterações na sua saúde física e emocional. Na ausência de cuidadores informais aptos para o seu papel, a temática do envelhecimento torna-se ainda mais grave e emergente. Com base nestas premissas, o nosso estágio decorreu de Setembro de 2013 a Fevereiro de 2014, na UCC de Elvas (1ª fase) e posteriormente, nos domicílios dos cuidadores informais. O estágio teve apenas uma intervenção na área da capacitação em AVD’s de alimentação, mobilização e eliminação, dos cuidadores informais com idosos dependentes a cargo, que era composta por sessões de educação para a saúde e sessões de treino e reuniões de grupo entre os cuidadores. Ao longo da intervenção foi utilizada a metodologia do planeamento em saúde e as sessões de educação para a saúde suportaram-se no MDAIF. Foram inseridos na intervenção 10 cuidadores informais e relativamente à satisfação manifestada pelos mesmos acerca da intervenção obteve-se um resultado de 100% que se mostraram muito satisfeitos ou extremamente satisfeitos. Este estágio de intervenção comunitária permitiu-nos adquirir a maioria das competências gerais do Enfermeiro Especialista assim como as competências específicas do Enfermeiro Especialista em Enfermagem Comunitária e de Saúde Pública definidas pela Ordem dos Enfermeiros.

Methotrexate nanoparticle delivery system for treatment of inflammatory bowel disease in pediatric patients

Purpose: To evaluate the efficacy and safety of methotrexate (MTX) nanoparticles in pediatric patients with inflammatory bowel disease (IBD). Methods: In this randomized, open-label clinical study, 28 pediatric patients with moderate to severe IBD were randomly assigned to treatment (MTX nanoparticles,15 mg/week) or control (azathioprine, AZA, 2 mg/kg/day) group. Nanoparticles were synthesized by adding calcium chloride to sodium alginate solution containing MTX, and was further treated with poly-L-lysine aqueous solution. The nanoparticles were evaluated for particle size, zeta potential and drug encapsulation efficacy. Erythrocyte sedimentation rate, C-reactive protein, aspartate aminotransferase, alanine transaminase, and disease activity scores were used to assess IBD remission. Results: Nanoparticle size, zeta potential and encapsulation efficacy were 164.4 ± 6.9 nm, -32.6 ± 3.7 mV, and 97.8 ± 4.2 %, respectively. After 12 weeks of therapy, the mean Pediatric Crohn\'s Disease Activity Index (PCDAI) scores for control and treatment groups were 22.3 ± 2.14 and 16.8 ± 1.87, respectively, while mean Pediatric Ulcerative Colitis Activity (PUCAI) Index scores were 24.3 ± 1.47 and 18.7 ± 1.92, respectively. Eight patients in the treatment and five patients in the control group achieved remission. Biochemical parameters varied significantly between the groups. Conclusion: MTX nanoparticles are safe and more effective than standard first-line IBD therapy. However, further studies are required to determine the suitability of the formulation for therapeutic use.

Filmes formados pelo copolímero SEBS e nanopartículas de óxidos de ferro : preparação e caracterização

Dissertação (mestrado)—Universidade de Brasília, Instituto de Física, Programa de Pós-Graduação em Física, 2016.

Stress-testing centralised model stores

One of the current challenges in model-driven engineering is enabling effective collaborative modelling. Two common approaches are either storing the models in a central repository, or keeping them under a traditional file-based version control system and build a centralized index for model-wide queries. Either way, special attention must be paid to the nature of these repositories and indexes as networked services: they should remain responsive even with an increasing number of concurrent clients. This paper presents an empirical study on the impact of certain key decisions on the scalability of concurrent model queries, using an Eclipse Connected Data Objects model repository and a Hawk model index. The study evaluates the impact of the network protocol, the API design and the internal caching mechanisms and analyzes the reasons for their varying performance.

Prévoir la Réussite des Étudiants en Techniques d’inhalothérapie et d’anesthésie

Abstract: Respiratory therapists must be able to care for their patients safely, efficiently and competently. They manage critically ill patients on life support systems. As a member of the anesthesia team they are responsible for the vulnerable patient undergoing surgery. Within all areas of the hospital they are called upon to make decisions and judgements concerning patient treatment. The environment that is found in the modern clinical setting is often stressful and demanding. The respiratory and anesthesia technology program has the responsibility of preparing competent practioners who graduate not only with a broad knowledge base but with the affective competencies that are required to meet these challenges. Faculty and clinical instructors in the program of Respiratory and Anesthesia Technology have been troubled by rising attrition rates and weak performance of students. It is apparent that this is not a problem unique to Vanier College. The rationale for this study was multi-fold; to establish a definition of student success, to determine whether pre-admission academic abilities can predict success in the program and whether scores on a professional behavioural aptitudes tool can predict success in the clinical year of the program. Predictors were sought that could be used either in the pre-program admission policies or during the course of study in order to ensure success throughout the program and beyond. A qualitative analysis involving clinical instructors and faculty (n=5) was carried out to explore what success signified for a student in the respiratory and anesthesia program. While this process revealed that a student who obtained a grade above 77.5% was considered “successful”, the concept surrounding success was a much more complex issue. Affective as well as cognitive and psychomotor abilities complete the model of the successful student. Appropriate behaviour and certain character traits in a respiratory therapy student are considered to be significant elements leading to success. Assessment of students in their clinical year of the respiratory & anesthesia technology program currently include little measurement of abilities in the affective domain, and the resulting grade becomes primarily a measure of academic and procedural skills. A quantitative study of preadmission records and final program grades was obtained from a single cohort of respiratory and anesthesia technology students who began the program in 2005 and graduated in 2008 (n=16). Data was collected and a descriptive analysis (analysis of variance, Pearson correlation) was used to determine the relationship between preadmission grades and success. The lack of association between the high school grades and grades in the program ran contrary to some of the findings in the literature and it can be cautiously inferred that preadmission grades do not predict success in the program. To ascertain the predictive significance of evaluating professional behavioural skills and success in clinical internship, a behaviour assessment tool was used by clinical instructors and faculty to score each student during a rotation in their third year of the program which was clinical internship. The results of this analysis showed that a moderately strong association could be made between a high score on the behavior assessment tool and final clinical grades. Therefore this tool may be effective in predicting success in the clinical year of the program. Refining the admissions process to meet the challenge and responsibility of turning out graduates who are capable of meeting the needs of the profession is difficult but essential. The capacity to predict which students possess the affective competencies necessary to cope and succeed in their clinical year is conceivably more important than their academic abilities. Although these preliminary findings contribute, to some degree, to the literature that exists concerning methods of predicting success in a respiratory and anesthesia technology program, much data is still unknown. Further quantitative and qualitative research is required using a broader population base to substantiate the findings of this small study.||Résumé: Les inhalothérapeutes doivent être capables de prodiguer des soins à leurs patients d’une manière sécuritaire, efficace et compétente. Ils/elles peuvent être appelé(e)s à gérer les soins aux personnes gravement malades branchées à un respirateur artificiel. En tant que membres de l’équipe d’anesthésie, ils/elles sont responsables des patients qui subissent une chirurgie. Ils/elles sont sollicité(e)s par tous les secteurs de l’hôpital pour décider ou juger des traitements à apporter aux malades. L’environnement dans lequel ils/elles travaillent est souvent stressant et exigeant. Le programme de Techniques d’inhalothérapie et d’anesthésie vise à former des inhalothérapeutes compétent(e)s qui possèdent non seulement les connaissances propres à la discipline mais également les aptitudes affectives nécessaires pour faire face à ces défis. Les enseignant(e)s et instructeur(e)s cliniques en Techniques d’inhalothérapie et d’anesthésie sont préoccupé(e)s par le taux d’abandon croissant et la faible performance des étudiant(e)s dans le programme. Il semble que ce problème ne soit pas unique au Collège Vanier. Le but de cette recherche est multiple : définir ce qu’est «réussir» pour les étudiant(e)s de ce programme; déterminer si les aptitudes scolaires acquises avant l’admission au programme peuvent aider à prévoir le succès des étudiant(e)s dans le programme; et si les résultats obtenus à un test mesurant les aptitudes comportementales professionnelles permettent de prévoir le succès des étudiant(e)s dans le stage clinique du programme. On a essayé d’identifier des facteurs qui pourraient être utilisés dans les politiques d’admission au programme ou celles régissant le cheminement dans le programme qui permettraient d’assurer le succès au cours du programme et par la suite. Une analyse qualitative a été conduite auprès des instructeur(e)s cliniques et des enseignant(e)s (n=5) afin d’étudier la notion de « réussite » des étudiant(e)s dans le programme. Bien qu’un(e) étudiant(e) ayant obtenu une note supérieure à 77.5% soit considéré(e) comme ayant « réussi », la notion de « réussite » est beaucoup plus complexe. Des aptitudes affectives, autant que cognitives et psychomotrices complètent le modèle d’un(e) étudiant(e) ayant réussi. Un comportement approprié et certains traits de caractère sont considérés comme des facteurs importants pour la réussite d’un(e) étudiant(e) en techniques d’inhalothérapie et d’anesthésie. L’évaluation qui se fait actuellement des étudiant(e)s dans le stage clinique du programme ne porte que peu sur les aptitudes affectives, et le résultat obtenu témoigne essentiellement des aptitudes scolaires et procédurales. Une analyse quantitative des dossiers des étudiant(e)s avant leur admission au programme et leurs notes finales a été conduite auprès d’une cohorte d’étudiant(e)s ayant commencé le programme en 2005 et gradué en 2008 (n=16). Des données ont été recueillies et une analyse descriptive (analyse de la variance, corrélation de Pearson) ont été faites afin de déterminer l’existence d’un lien entre les notes obtenues au secondaire et celles obtenues dans le programme. L’absence de corrélation entre les deux catégories de notes va à l’encontre de certaines recherches publiées et on peut déduire avec réserve que les notes obtenues avant l’admission au programme ne permettent pas de prévoir la réussite dans le programme. Afin de vérifier la portée de l’évaluation du comportement professionnel et de la réussite en milieu clinique quant à la prévision de réussite dans le programme, une méthode d’évaluation du comportement a été appliquée par les instructeurs(e) cliniques et les enseignant(e)s pour évaluer chaque étudiant(e) au cours d’une rotation dans leur troisième année de stage clinique. Les résultats de cette analyse ont démontré qu’une corrélation moyennement forte pouvait être faite entre une bonne note à l’évaluation comportementale et les notes finales du stage clinique. Perfectionner le processus d’admission au programme afin d’assumer la responsabilité de former des diplômé(e)s capables de répondre aux besoins de la profession est difficile mais essentiel. Avoir les moyens de prévoir quels/quelles étudiant(e)s ont les compétences affectives nécessaires pour faire face à la réussite de leur année de stage clinique est peut être plus important que d’avoir les aptitudes scolaires. Bien que ces observations préliminaires contribuent, à un certain degré, à la littérature existante sur les méthodes de prévoir la réussite dans le programme d’inhalothérapie et d’anesthésie, plusieurs données restent inconnues. Une recherche quantitative et qualitative plus élaborée, conduite sur un échantillon plus large de la population, est nécessaire afin de corroborer les résultats de cette étude limitée.

Evaluation of frozen ground conditions along a coastal topographic gradient at Byers Peninsula (Livingston Island, Antarctica) by geophysical and geoecological methods

Geophysical surveying and geoelectricalmethods are effective to study permafrost distribution and conditions in polar environments. Geoelectrical methods are particularly suited to study the spatial distribution of permafrost because of its high electrical resistivity in comparison with that of soil or rock above 0 °C. In the South Shetland Islands permafrost is considered to be discontinuous up to elevations of 20–40ma.s.l., changing to continuous at higher altitudes. There are no specific data about the distribution of permafrost in Byers Peninsula, in Livingston Island, which is the largest ice-free area in the South Shetland Islands. With the purpose of better understanding the occurrence of permanent frozen conditions in this area, a geophysical survey using an electrical resistivity tomography (ERT)methodologywas conducted during the January 2015 field season, combined with geomorphological and ecological studies. Three overlapping electrical resistivity tomographies of 78meach were done along the same profile which ran from the coast to the highest raised beaches. The three electrical resistivity tomographies are combined in an electrical resistivitymodel which represents the distribution of the electrical resistivity of the ground to depths of about 13malong 158m. Several patches of high electrical resistivity were found, and interpreted as patches of sporadic permafrost. The lower limits of sporadic to discontinuous permafrost in the area are confirmed by the presence of permafrost-related landforms nearby. There is a close correspondence between moss patches and permafrost patches along the geoelectrical transect.