3,346 research outputs found
Traços de manufactura na utensĂlagem Ăłssea gravettense esolutrense de Vale Boi (Vila do Bispo, Algarve)
Es presenta una proposta de metodologia d’anĂ lisi de traces de manufactura deixades pels utensilis lĂtics sobre la superfĂcie dels artefactes en òs i asta de cronologia gavetiana i solutriana, recuperats del jaciment arqueològic de Vale Boi. Aquesta metodologia tĂ© en compte els atributs morfològics, aixĂ com tambĂ© les alteracions tafonòmiques que es veriquen a les superficies òssies.This is a methodological analysis of the traces of manufacture left by the lithic tools on the gravettian and solutrean bone tools surface from Vale Boi. We take in acount the morphological atributes and also the taphonomical alterations the osseous artefacts suffered during the time they were buried.Apresenta-se aqui uma proposta de metodologia de análise dos traços de manufactura deixados pelos utensĂlios lĂticos sobre a superfĂcie dos artefactos em osso e em haste de cronologia gravettense e solutrense, recuperados do sĂtio arqueolĂłgico de Vale Boi. Esta metodologia tem em conta os atributos morfolĂłgicos, mas tambĂ©m as alterações tafonĂłmicas que se verificaram nas superfĂcies Ăłsseas
Um sistema de supervisão como processo integrante do crescimento pessoal e profissional dos docentes ao serviço do desenvolvimento institucional
79 f.Este projecto de intervenção inscreve-se no âmbito da unidade curricular de Projecto de Investigação, na PĂłs-Graduação de SupervisĂŁo PedagĂłgica e Formação de Formadores, orientado pelos Docentes JoĂŁo Gouveia e JosĂ© LuĂs Gonçalves. O objectivo consiste em criar um Sistema de SupervisĂŁo num contexto real de Ensino Particular - ColĂ©gio Novo da Maia (CNM), de forma a responder Ă s necessidades actuais da equipa docente e na equipa de SupervisĂŁo. A urgĂŞncia em acompanhar e apoiar os professores que recruta e os que integram a equipa, no contexto de desenvolvimento e de rápido crescimento em que o ColĂ©gio se encontra implica a formalização de um sistema de SupervisĂŁo exequĂvel para os supervisores.
O sistema de SupervisĂŁo que aqui se propõe confirma os pressupostos do Projecto Educativo na concepção de uma escola “como comunidade na qual todos os elementos que a compõe actuam de uma forma responsável e flexĂvel” (in Projecto Educativo do CNM).
Na construção deste sistema de Supervisão efectuaram-se pesquisas e leituras que permitiram encontrar um quadro conceptual de partida para uma modelização da acção supervisiva de uma forma estruturada e sustentada em modelos de referência no campo da Supervisão.
Com base nos modelos ClĂnico, Reflexivo e EcolĂłgico, tornou-se possĂvel a construção de um Sistema de SupervisĂŁo Ă luz das necessidades especĂficas dos membros equipa docente e das prioridades para acção educativa contempladas no Projecto Educativo do CNM
Imagining pain: the representation of violence in beloved, push, and the dew breaker
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Letras/Inglês e Literatura Correspondente, Florianópolis, 2011A presente tese reflete sobre maneiras de sermos afetados por representações de violência e sofrimento humano. A discussão parte da incapacidade do discurso midiático em sensibilizar sua audiência quando imagens violentas não são capazes de causar choque e empatia. Em contraste a estas representações, este estudo examina representações literárias e a experiência de leitura de narrativas que são temática e esteticamente violentas. O argumento segue a metodologia proposta por Marco Abel (2007) na qual a representação de eventos violentos é abordada em termos de sua força estética; em termos do potencial da literatura em suspender o significado e a verdade evitando, assim, a transformação da experiência da violência em uma representação da violência. As análises de Beloved (1987) de Toni Morrison, Push (1996) de Sapphire e The Dew Breaker (2004) de Edwidge Danticat ilustram como escritoras negras norte-americanas utilizam o recurso narrativo deferral of truth ("postergar a verdade"). Tal recurso carrega o potencial de subverter o conhecimento do leitor, trazer de volta sensação e oferecer a possibilidade de criarmos novos significados. Desta forma, estas narrativas de violência e dor tornam-se espaços de indeterminação e dúvida, mas também de imaginação, criatividade e reflexão
Primary school pupils’ misconceptions of the human respiratory system in primary school students: from identification to deconstruction
This study involved 38 students from the 6th year of schooling attending a state school in Lisbon in
which the Science syllabus is centered on the study of human body systems. Its purpose was to
determine: (i) whether the students possessed any of the misconceptions related to the human
respiratory system referenced in other studies (e.g. air enters and leaves our bodies with no function,
air tubes connect the lungs to the heart, the air exhaled is rich in carbon dioxide and poor in oxygen);
(ii) whether a learning design focused on the deconstruction of these misconceptions would be
effective to the conceptual change of these pupils. To this end, the experimental group (class A)
experienced a learning design expressly conceived for the deconstruction of the misconceptions
related to the human respiratory system, while the control group (class B) experienced a traditional
approach with interactive lectures and use of the school textbook. The data were collected through a
questionnaire administered in two stages (pre and post-test) and a t-test was used to compare the
means obtained by the two groups in the pre-test and to verify the gains of each class between the pre
and the post-test. After analysis of the results of the pre-test, it was found that the students of the two
groups had several misconceptions of the human respiratory system. The experimental group had
more significant gains, although the students in both groups reduced their misconceptions. Both
results support the idea that formal education, if provided with well-structured activities, can contribute
to the conceptual restructuring of the students’ mind, albeit with a different rate of success. Finally, the
present study also helps to confirm the universality of certain misconceptions.info:eu-repo/semantics/publishedVersio
Expression of MMP-13 in Human Temporomandibular Joint Disc Derangement and Osteoarthritis
Objective: MMP-13 performs digestion of collagen, which is a primary component of the temporomandibular joint (TMJ) articular disc. This study evaluated the expression of MMP-13 in patients with anterior disc displacement with (ADDwR) and without reduction (ADDwoR), and in the presence of TMJ osteoarthrosis.
Methods: Thirty-nine human temporomandibular joint disc samples were collected and divided in two ways: ADDwR (21 samples), ADDwoR (10 samples), and a control group (8 samples); and with osteoarthrosis (10 samples) and without osteoarthrosis (29 samples). Immunostaining of the TMJ discs was statistically compared between the groups.
Results: There was no statistically significant difference for the area of MMP-13 immunostaining between the control group, ADDwR, and ADDwoR, nor between groups with and without osteoarthrosis.
Conclusion: This study suggests MMP-13 is not significantly involved in collagen degradation in human TMJ disc displacement or osteoarthrosis
Internal dose of particles in the elderly: modeling based on aerosol measurements
The paper presents an integrated methodology that combines experimental and modeling techniques and links exposure to airborne particulate matter (PM) with internal dose in the respiratory system and burden in adjacent tissues over a period of time. The methodology is used to estimate doses in the respiratory systems of elders that reside in 10 elderly care centers (ECCs) in the metropolitan area of Lisbon. Measurements of PM were performed in the ECCs and combined with a time-budget survey for the occupants. This information served as input to the first model that estimated particle doses in the different regions of the respiratory tract of the elderly, and then a second model was used to calculate particle build-up in the alveolar region, the interstitium and the hilar lymph nodes of the elders over a 5-year exposure period. It was found that in 5Â years of continuous exposure to the average particle concentration measured over all ECCs, 258Â mg of all particles are deposited on the surface of the alveoli of which 79.6% are cleared, 18.8% are retained in the alveolar region, 1.5% translocate to the hilar lymph nodes, and 0.1% are transferred to the interstitium.info:eu-repo/semantics/publishedVersio
Emission channeling studies of Indium Phosphide at low temperatures at CERN-ISOLDE
Tese de mestrado, FĂsica (FĂsica Nuclear e PartĂculas), Universidade de Lisboa, Faculdade de CiĂŞncias, 2009111In radioactive atoms were implanted into a single crystal of InP. After annealing for lattice recovery of implantation defects, the lattice site location of 111In/111Cd was studied with the emission channelling technique, from room temperature ( 300K) down to 50K at CERN-ISOLDE 2.This work aims to test a recently developed cooling station for emission channelling experiments. InP is a material with a relatively low Debye temperature, where significant changes of atomic vibrations are expected with temperature, thus providing an ideal test ground of the effects, which can be expected to influence the data, i.e., dechanneling from lattice vibration and changes of the root mean square displacement (r.m.s.) of the atomic position of the probe atom. In the future we intend to apply these studies to monitor individual impurities or lattice constituents, with temperature, upon phase transitions as well as studying lattice sites of dopants implanted at low temperature. 2"The On-Line Isotope Mass Separator ISOLDE is a facility dedicated to the production of a large variety of radioactive ion beams for a great number of different experiments" http://isolde.web.cern.ch/ISOLDE
Light pollution and energy efficiency: a case study of the village of Vialonga
Since industrialization and the formation of larger urban centers in the nineteenth century, pollution of the environment was always present in daily life in various ways, namely in the form of light. Light pollution can cause various consequences, both for humans and for their ecosystem, producing effects on environmental, social, economic and scientific level. In Portugal, the lighting is responsible for 3% of total electricity consumption, energy costs are in some cases more than 50% towards the costs incurred by municipalities with energy, checking-in recent years a trend similar to that improvement of illumination levels in the region (about 4 to 5% per year). Proper use of lighting brings many benefits both to the citizen and environment, since greater energy efficiency can contribute to reducing CO2 emissions, energy costs, as well as to decrease the use of resources not-renewable and/or contamination of renewable resources, which can occurs in the process of obtaining electricity. The present study has a main goal to analyze the illuminance levels associated to the public lighting of the village of Vialonga, Vila Franca de Xira (Portugal), to verify if it is efficient. The aim is also to relate the efficiency of street lighting with the existence of light pollution
Immunohistochemical Expression of Matrix Metalloprotease-2 and Matrix Metalloprotease-9 in the Disks of Patients with Temporomandibular Joint Dysfunction
Purpose
Matrix metalloproteases (MMPs) are tissue-remodeling enzymes that function during the remodeling process, such as in immune-inflammatory diseases. Metalloprotease-2 (MMP-2) and metalloprotease-9 (MMP-9) are gelatinases that degrade several types of extracellular matrix collagen. It is hypothesized that in temporomandibular joint (TMJ) dysfunction, MMP-2 and MMP-9 expression levels may be elevated. Therefore, the objective of this study is to determine the association of MMP-2 and MMP-9 expression with temporomandibular joint dysfunction using an immunohistochemical approach to evaluate the joint disk. Material and Methods
A total of 45 human temporomandibular joint samples were collected, with 36 samples in the test group (patients with anterior disk displacement with reduction (n = 29) and without reduction (n = 7)) and nine samples in the control group. The immunostaining of the TMJ disks was statistically compared between the groups (P \u3c 0.05). Results
There was a statistically significant difference for the area of MMP-2 immunostaining between the control group and the displacement disks with reduction group (ADDwR) (P = 0.048) and between the groups with disk displacement and without reduction (ADDwoR) (P = 0.029). The expression of MMP-2 was significantly elevated in the ADDwoR group. Conclusion
No statistically significant difference was found between the variable area of MMP-9 expression in the disk with and without disk displacement, as determined by immunohistochemical analysis. However, there was an elevation of MMP-2 expression in the disks of patients with displacement and without reduction (more severe alteration)
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