116 research outputs found
RACE, SLAVERY, AND EVASION: WHITMAN AND MELVILLEâS CHANGING PERSPECTIVES AND THEIR GLANCING POETIC TREATMENT OF THE CORE CIVIL WAR ISSUE
Whitman and Melvilleâs poetry about the Civil War is almost completely silent when it comes to slavery. Both writers depict a newly emancipated person in their poems about the Civil War, but they seem to do so almost as an afterthought. Both Whitman\u27s âEthiopia Saluting the Colorsâ and Melville\u27s âFormerly a Slaveâ represent an elderly African American woman. These poems stand alone in their representation of an African American. Peter J. Bellis argues that both writers were concerned with how to negotiate national emotions and policies by the end of the war and these âemotionsâ and âpoliciesâ were vital to understanding liberation. The subject of liberated slaves was an emotional issue because people feared that there were not enough jobs and that African Americans would get the scarce positions because they would presumably work for less pay. Bellis believes that Whitman and Melville were hesitant to address liberated slaves, but Ethiopia and Formerly a Slave indicate that Whitman and Melville each depicted a liberated slave on at least one occasion. Why did these writers who were in so many ways bold and forward-thinking do little to address slavery and African Americans? What motivated them to include these rare poems treating African Americans in their poetry collections?
Advisor: Kenneth M. Pric
Ătude de la commande par mode de glissement sur les systĂšmes mono et multi variables
Dans ce mémoire, nous avons approfondi notre étude sur la commande non linéaire par mode de glissement appliquée à des systÚmes mono entrée / mono sortie (SISO) et à des systÚmes multi / entrées multi sorties (MIMO). Nous avons tenté d'élaborer théoriquement une approche qui réduit les commutations haute fréquence qui se manifestent en régime établi, sans toutefois détériorer les performances de poursuite du contrÎleur non linéaire en régime permanent. Cette approche consiste à concevoir des composantes discontinues contenant des termes exponentiels qui s'adaptent dynamiquement aux fluctuations du systÚme étudié. Nous avons concentré notre étude expérimentale sur un systÚme mono variable, à savoir un systÚme à lévitation magnétique, et sur un systÚme multi variable, a savoir un robot manipulateur modulaire hyper redondant. Afin de valider notre approche sur ces deux systÚmes, nous avons comparé expérimentalement cette derniÚre à d'autres approches existantes dans la littérature basées sur la commande par mode de glissement. Les résultats expérimentaux enregistrés sur les deux systÚmes non linéaires ont montré une supériorité notable de notre approche, surtout en ce qui concerne la réduction des commutations haute fréquence de la commande en régime établi
Intégration de l'analyse du cycle de vie dans une approche de quantification corporative des émissions de gaz à effet de serre
RĂSUMĂ
Un nombre important de méthodologies pour comptabiliser les émissions de gaz à effet
de serre a suivi la mise en application dâoutils de lutte contre le changement climatique
proposĂ©s par le protocole de Kyoto, dont les marchĂ©s dâĂ©change des Ă©missions. Les
méthodologies de comptabilisation des émissions GES font face à un enjeu important:
quantifier, inventorier et dĂ©clarer les Ă©missions GES dâune organisation.
Ce projet de maĂźtrise Ă©tudie lâutilisation de lâanalyse du cycle de vie pour bonifier la
méthodologie de quantification corporative des émissions de gaz à effet de serre. Il est
articulĂ© autour de lâhypothĂšse de recherche suivante : la compatibilitĂ© de lâanalyse du
cycle de vie quant Ă la quantification corporative des Ă©missions de gaz Ă effet de serre
permet de lâintĂ©grer et de la bonifier grĂące Ă une meilleure connaissance de la chaĂźne
logistique ainsi quâune approche multicritĂšre de lâĂ©valuation des impacts
environnementaux.
LâhypothĂšse de recherche se dĂ©cline sur deux objectifs de projets. En premier lieu, il
sâagit de vĂ©rifier la compatibilitĂ© des Ă©lĂ©ments mĂ©thodologiques des deux approches et
la possibilitĂ© thĂ©orique dâintĂ©grer lâACV dans la quantification des GES. Dans ce but,
les deux méthodologies sont comparées de façon systématique. Par la suite, une
approche conceptuelle de leur intĂ©gration est dĂ©veloppĂ©e. En second lieu, il sâagit de
vérifier la possibilité pratique de cette intégration. Pour ce faire, des bilans GES et une
ACV sont réalisés sur des opérations de « Veolia Propreté ». Une comparaison
systématique des résultats permet de vérifier trois critÚres de validation et entériner ainsi
lâapproche conceptuelle.
Tout dâabord, la comparaison systĂ©matique des deux mĂ©thodologies identifie trois
éléments méthodologiques clé qui permettent leur compatibilité : les frontiÚres de
systĂšme, lâĂ©valuation des impacts et lâhorizon temporel. En regard de ceux-ci,
lâapproche conceptuelle dĂ©veloppe une reprĂ©sentation de lâadĂ©quation des deux
méthodologies selon trois axes :
· ChaĂźne logistique : selon cet axe, celui du cycle de vie de lâorganisation, lâACV
est déstructurée à la maniÚre de la comptabilisation GES. Ceci rend compatibles
les frontiÚres de systÚmes des deux méthodologies.
· Ăvaluation des impacts : la compatibilitĂ© des mĂ©thodologies vient du fait que
lâĂ©valuation de lâimpact sur le changement climatique est dĂ©jĂ incluse dans
lâACV. Qui plus est, cette derniĂšre Ă©largit lâĂ©ventail des impacts
environnementaux considérés, de par son approche multicritÚres.
· Horizon temporel : les deux méthodologies sont compatibles grùce à une unité
fonctionnelle de lâACV fixĂ©e par rapport aux opĂ©rations annuelles de
lâorganisation Ă lâĂ©tude.----------ABSTRACT
With the implementation of Kyoto Protocol and the carbon market, greenhouse gas
accounting became high on the agenda of environmental management. Corporate
greenhouse gas accounting hence faces a great challenge: quantify, account and report
for corporate greenhouse gas emissions.
This M.Sc.A. research project focuses on the use of life cycle assessment in order to
improve corporate greenhouse gas accounting methodology. Hence, the research
hypothesis of this project is as follow:
Being compatible one to the other, life cycle assessment can be
incorporated to greenhouse gas accounting. The latter is thus improved
through a better understanding of the logistic chain and a multicriteria
approach of the evaluation of environmental impacts.
This research hypothesis aims to attain two objectives. The first objective is to verify
the compatibility of various components of both methodologies and the theoretical
possibility to combine them. In order to do so, they are consistently compared. A
conceptual approach of their integration is then developed. The second objective of the
project is to verify the practical possibility of that integration. In order to do so, a case
study is performed on âVeolia PropretĂ©â operations. Greenhouse gas accounting and life
cycle assessment are both performed. Their respective results are consistently compared
over three validation criterias, thus confirming the conceptual approach.
The systematic comparison of greenhouse gas accounting and life cycle assessment
methodologies identifies three methodological components which enable their
compatibility: system boundaries, impact assessment and temporal aspect. The
conceptual approach represents the combination of both methodologies with regards to
these three items. Therefore, it proposes to consider three axes:
· Logistic chain : life cycle assessment product system is de-aggregated with
regards of the organization logistic chain. The latter represents its life cycle. This reorganization of life cycle assessmentâs product system is in adequacy to GHG
accounting methodology which categorizes the emissions into three scopes of
accounting. The system boundaries of both systems are thus compatible one to
another.
· Impact assessment : the compatibility of both methodologies comes from the
fact that climate change impact assessment of greenhouse gas accounting is
already included in life cycle assessment. As a matter of fact, it broadens the
impact assessment through a multicriteria approach to environmental impact
evaluation.
· Temporal aspect : both methodologies are compatible by the means of life cycle
assessmentâs functional unit. As a matter of fact, it is set to the annual operations
of the organization
Melanoma in situ mimicking a lichen planus-like keratosis
The incidence of melanoma has steadily increased over the past three decades. Melanoma in situ (MIS), defined as melanoma that is limited to the epidermis, contributes to a disproportionately high percentage of this rising incidence. Amelanotic melanoma presents as an erythematous macule or plaque and may initially be misdiagnosed as an inflammatory disorder. We report a case of amelonatic MIS raised on non-sun-exposed skin, inducing a lichen planuslike keratosis as inflammatory reaction, which clinically masked the melanoma
Treatment threshold for intra-operative hypotension in clinical practice-a prospective cohort study in older patients in the UK
Intra-operative hypotension frequently complicates anaesthesia in older patients and is implicated in peri-operative organ hypoperfusion and injury. The prevalence and corresponding treatment thresholds of hypotension are incompletely described in the UK. This study aimed to identify prevalence of intra-operative hypotension and its treatment thresholds in UK practice. Patients aged â„ 65âyears were studied prospectively from 196 UK hospitals within a 48-hour timeframe. The primary outcome was the incidence of hypotension (mean arterial pressure 20%; systolic blood pressure 20% reduction in systolic blood pressure from baseline and 77.5% systolic blood pressure <100âmmHg. The mean (SD) blood pressure triggering vasopressor therapy was mean arterial pressure 64.2 (11.6) mmHg and the mean (SD) stated intended treatment threshold from the survey was mean arterial pressure 60.6 (9.7) mmHg. A composite adverse outcome of myocardial injury, kidney injury, stroke or death affected 345 patients (7.3%). In this representative sample of UK peri-operative practice, the majority of older patients experienced intra-operative hypotension and treatment was delivered below suggested thresholds. This highlights both potential for intra-operative organ injury and substantial opportunity for improving treatment of intra-operative hypotension
EPRL Sliding Mode Flight Controller with Model-based Switching Manifold of a Quad-Rotor UAV
PresentaciĂłn realizada en el marco Proyecto PINV18-765: VehĂculos aĂ©reos no tripulados en aplicaciones para la agricultura de precisiĂłn para el monitoreo de cultivos agrĂcolas. Cuyo objetivo general fue: el Estudio, investigaciĂłn, anĂĄlisis y validaciĂłn experimental de, por un lado, avanzadas estrategias de control de vuelo de vehĂculos no tripulados (UAV) y, por otro, de algoritmos de procesamiento de imĂĄgenes obtenidas por el UAV, orientada al anĂĄlisis de cultivos agrĂcolas enfocado al desarrollo del sector agropecuario.CONACYT - Consejo Nacional de Ciencias y TecnologĂaPROCIENCI
Diverses modalitĂ©s de traitement des troubles dâapprentissage scolaire par thĂ©rapies visuelles: quelles sont les Ă©vidences scientifiques?
Les troubles dâapprentissage sont des dĂ©sordres complexes qui entravent le dĂ©veloppement normal des processus dâacquisition et de traitement de lâinformation. ils sont couramment rencontrĂ©s au sein de la population pĂ©diatrique et peuvent se manifester sous diverses formes dont la plus frĂ©quente est la dyslexie. Les troubles dâapprentissage ont une nature chronique et nâont pas pour cause premiĂšre des handicaps visuels, auditifs et/ ou moteurs, la dĂ©ficience intellectuelle, la perturbation affective ni mĂȘme un milieu dĂ©favorisĂ©. Cependant, il est possible que ces troubles puissent coexister avec lâun ou lâautre de ces problĂšmes.
Puisque les enfants qui en sont atteints rencontrent souvent des difficultĂ©s de taille lors des apprentissages fondamentaux dĂšs leur entrĂ©e Ă lâĂ©cole primaire, il est essentiel de leur offrir un soutien adaptĂ©, un diagnostic prĂ©coce et une intervention efficace. Plusieurs hypothĂšses impliquant divers problĂšmes visuels ont Ă©tĂ© Ă©mises quant Ă la cause de la dyslexie et des troubles dâapprentissage. La prĂ©sente revue de littĂ©rature traite de ces diverses hypothĂšses de traitement des troubles dâapprentissage scolaire par thĂ©rapies visuelles.
Lâanalyse dĂ©montre quâil nây a pas de preuves scientifiques suffisantes Ă ce jour prouvant que la thĂ©rapie visuelle, les lunettes dâentraĂźnement, les exercices de poursuites et de saccades, les exercices perceptuels, les lunettes grossissantes, les filtres ou lentilles colorĂ©es ainsi que les prismes peuvent amĂ©liorer significativement les troubles dâapprentissage
The Impact of Industry 4.0 on Ergonomics
The fourth industrial revolution (Industry 4.0) has accelerated technology advancement across the manufacturing sector. The technologies of Industry 4.0 make it possible for manufacturing processes to be more efficient while also bringing about changes in human work that may pose new risks to employee wellbeing and test their current abilities. Technologies, such as virtual reality and augmented reality have a significant impact to revise the position and responsibilities of human in the manufacturing environment. Thus, ergonomic perspectives have evolved from focusing solely on adjusting the human to the other components of the work system physically and psychosocially into upgrading cognitive skills to process more information. There are very few ergonomics-related studies in the literature with reference to Industry 4.0 emerging technologies. Especially, research on emphasizing the importance of the concurrent development of technical and ergonomic skills in the industrial setting is a necessity in this modern era. This research aims to explain the modified manufacturing environment, define the role of the human in this new production settings and describe the cognitive modifications required to fit into the Industry 4.0 habitat
Treatment threshold for intraâoperative hypotension in clinical practiceâa prospective cohort study in older patients in the UK
Intra-operative hypotension frequently complicates anaesthesia in older patients and is implicated in peri-operative organ hypoperfusion and injury. The prevalence and corresponding treatment thresholds of hypotension are incompletely described in the UK. This study aimed to identify prevalence of intra-operative hypotension and its treatment thresholds in UK practice. Patients aged â„ 65âyears were studied prospectively from 196 UK hospitals within a 48-hour timeframe. The primary outcome was the incidence of hypotension (mean arterial pressure 20%; systolic blood pressure 20% reduction in systolic blood pressure from baseline and 77.5% systolic blood pressure <100âmmHg. The mean (SD) blood pressure triggering vasopressor therapy was mean arterial pressure 64.2 (11.6) mmHg and the mean (SD) stated intended treatment threshold from the survey was mean arterial pressure 60.6 (9.7) mmHg. A composite adverse outcome of myocardial injury, kidney injury, stroke or death affected 345 patients (7.3%). In this representative sample of UK peri-operative practice, the majority of older patients experienced intra-operative hypotension and treatment was delivered below suggested thresholds. This highlights both potential for intra-operative organ injury and substantial opportunity for improving treatment of intra-operative hypotension
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