Testes de estresse na avaliação do vigor de sementes de milho

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Riemannian Submersions with Discrete Spectrum

We prove some estimates on the spectrum of the Laplacian of the total space of a Riemannian submersion in terms of the spectrum of the Laplacian of the base and the geometry of the fibers. When the fibers of the submersions are compact and minimal, we prove that the spectrum of the Laplacian of the total space is discrete if and only if the spectrum of the Laplacian of the base is discrete. When the fibers are not minimal, we prove a discreteness criterion for the total space in terms of the relative growth of the mean curvature of the fibers and the mean curvature of the geodesic spheres in the base. We discuss in particular the case of warped products.

What types of unintentional injuries kill our children? Do infants die of the same types of injuries? A systematic review

The objective of this study was to review mortality from external causes (accidental injury) in children and adolescents in systematically selected journals. This was a systematic review of the literature on mortality from accidental injury in children and adolescents. We searched the Pubrvled, Latin-American and Caribbean Health Sciences and Excerpta Medica databases for articles published between July of 2001 and June of 2011. National data from official agencies, retrieved by manual searches, were also reviewed. We reviewed 15 journal articles, the 2011 edition of a National Safety Council publication and 2010 statistical data from the Brazilian National Ministry of Health Mortality Database. Most published data were related to high-income countries. Mortality from accidental injury was highest among children less than 1 year of age. Accidental threats to breathing (non-drowning threats) constituted the leading cause of death among this age group in the published articles. Across the pediatric age group in the surveyed studies, traffic accidents were the leading cause of death, followed by accidental drowning and submersion. Traffic accidents constitute the leading external cause of accidental death among children in the countries understudy. However, infants were vulnerable to external causes, particularly to accidental non-drowning threats to breathing, and this age group had the highest mortality rates for external causes. Actions to reduce such events are suggested. Further studies investigating the occurrence of accidental deaths in low-income countries are needed to improve the understanding of these preventable events.

Flut und Hitze: Auswirkungen extremer Klimaereignisse auf die epigäische Arthropodenfauna (Araneae – Spinnen) ufernaher Lebensräume (Auen, Polder) des Inselrheins bei Mainz

Die vorliegende Arbeit ist ein Teil des Projektes Flut und Hitze des Kompetenzzentrums Überflutung an der Universität Mainz. Die Ziele dieser Untersuchung waren: Die Artzusammensetzung und Phänologien der Spinnengemeinschaften von Uferhabitaten bei Mainz (Rheinland-Pfalz, Deutschland) zu ermitteln, anhand des Artenspektrums die Folgen langjähriger Trockenheit und die Auswirkungen des Extremsommers 2003 zu beschreiben, Einflüsse von Überflutungen festzustellen und die Submersionstoleranzen ausgewählter Arten zu bestimmen. Insgesamt wurden 27783 Spinnen aus 179 Arten und 24 Familien bearbeitet. Die Untersuchung umfasste einen Hartholzauwald bei Ingelheim am Rhein, den Hochwasserschutzpolder Ingelheim, sowie Tiermaterial von vier weiteren Uferstandorten und drei Inselstandorten des Rheins bei Mainz. Die Beprobung der Hartholzaue mit Barberfallen und Stammeklektoren erfolgte von Mai 2005 bis Mai 2008. Im Polder wurden von Oktober 2006 bis Mai 2008 mit Barberfallen und einem Vakuumsauger gefangen. Die Proben der weiteren Standorte stammten aus Barberfallenfängen der Jahre 2000 bis einschließlich 2005. In der seit Winter 2002/2003 nicht mehr überfluteten und im Sommer stark austrocknenden Hartholzaue wurde eine als xerotolerant zu bezeichnende Spinnenfauna vorgefunden. Dies galt insbesondere für die sehr artenreiche Stammregion. Zu den dominierenden Spezies zählten: Diplostyla concolor (Boden), Clubiona pallidula und Textrix denticulata (beide Stamm). Der Polder Ingelheim wurde überwiegend von euryöken Freilandbewohnern besiedelt, dominant kamen Oedothorax apicatus und Pardosa agrestis vor. Das Tiermaterial der Ufer- und Inselstandorte wies deutliche Unterschiede in der Artenzusammensetzung im Bezug auf die Flutungsintensität auf. Nach dem Ausbleiben von Hochwässern und dem starken Austrocknen der Standorte im Sommer 2003 wurden hygrobionte Arten wie Allomengea vidua kaum mehr vorgefunden, während sich xerotolerante Spezies ausbreiteten. Darüber hinaus wurden die Submersionstoleranzen ausgewählter Spinnenarten im Labor ermittelt. Die gewonnenen Daten lassen Vermuten, dass die getesteten Spinnenspezies durchaus in der Lage sind, bei niedrigen Wassertemperaturen eine kurze Flut submers zu überstehen. Unter hohen Temperaturen besteht dagegen keine Submersionstoleranz.

Mineralogy micromorphology, and geochemistry at DSDP Site 89-585

At Site 585 of Deep Sea Drilling Project Leg 89 more than 500 m of volcaniclastic to argillaceous middle-Late Cretaceous sediments were recovered. Analyses by X-ray diffraction (bulk sediment and clay fraction), transmission electron microscopy, molecular and atomic absorption, and electron microprobe were done on Site 585 samples. We identify four successive stages and interpret them as the expression of environments evolving under successive influences: Stage 1, late Aptian to early Albian - subaerial and proximal volcanism, chiefly expressed by the presence of augite, analcite, olivine, celadonite, small and well-shaped transparent trioctahedral saponite, Al hydroxides, Na, Fe, Mg, and various trace elements (Mn, Ni, Cr, Co, Pb, V, Zn, Ti). Stage 2, early to middle Albian - submarine and less proximal volcanic influence, characterized by dioctahedral and hairy Mg-beidellites, a paucity of analcite and pyroxenes, the presence of Mg and K, and local alteration of Mg-smectites to Mg-chlorites. Stage 3, middle Albian to middle Campanian - early marine diagenesis, marked by the development of recrystallization from fleecy smectites to lathed ones (all of alkaline Si-rich Fe-beidellite types), by the development of opal CT and clinoptilolite, and by proximal to distal volcanic influences (Na parallel to Ti, K). Local events consist of the supply of reworked palygorskite during the Albian-Cenomanian, and the recurrence of proximal volcanic activity during the early Campanian. Stage 4, late Campanian to Maestrichtian - development of terrigenous supply resulting from the submersion of topographic barriers; this terrigenous supply is associated with minor diagenetic effects and is marked by a clay diversification (beidellite, illite, kaolinite, palygorskite), the rareness of clay recrystallizations, and the disappearance of volcanic markers.

Formas composicionais de grande arquitetura e formas miniaturizadas na literatura pianística - paradigmas, aproximações e perspetivas

Dissertação apresentada à Escola Superior de Artes Aplicadas do Instituto Politécnico de Castelo Branco para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Música – Área de Especialização em Piano.

Development of a Mechanism and Process to Continuously Produce Spherical, Torrefied Biomass

Thesis (Master, Mechanical and Materials Engineering) -- Queen's University, 2016-06-17 02:15:25.215

Escape worthiness of vehicles for occupancy survivals and crashes. Second part: appendices. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

DEVELOPMENT OF A MECHANISM AND PROCESS TO CONTINUOUSLY PRODUCE SPHERICAL, TORREFIED BIOMASS PELLETS

A recently developed novel biomass fuel pellet, the Q’ Pellet, offers significant improvements over conventional white pellets, with characteristics comparable to those of coal. The Q’ Pellet was initially created at bench scale using a proprietary die and punch design, in which the biomass was torrefied in-situ¬ and then compressed. To bring the benefits of the Q’ Pellet to a commercial level, it must be capable of being produced in a continuous process at a competitive cost. A prototype machine was previously constructed in a first effort to assess continuous processing of the Q’ Pellet. The prototype torrefied biomass in a separate, ex-situ reactor and transported it into a rotary compression stage. Upon evaluation, parts of the prototype were found to be unsuccessful and required a redesign of the material transport method as well as the compression mechanism. A process was developed in which material was torrefied ex-situ and extruded in a pre-compression stage. The extruded biomass overcame multiple handling issues that had been experienced with un-densified biomass, facilitating efficient material transport. Biomass was extruded directly into a novel re-designed pelletizing die, which incorporated a removable cap, ejection pin and a die spring to accommodate a repeatable continuous process. Although after several uses the die required manual intervention due to minor design and manufacturing quality limitations, the system clearly demonstrated the capability of producing the Q’ Pellet in a continuous process. Q’ Pellets produced by the pre-compression method and pelletized in the re-designed die had an average dry basis gross calorific value of 22.04 MJ/kg, pellet durability index of 99.86% and dried to 6.2% of its initial mass following 24 hours submerged in water. This compares well with literature results of 21.29 MJ/kg, 100% pellet durability index and <5% mass increase in a water submersion test. These results indicate that the methods developed herein are capable of producing Q’ Pellets in a continuous process with fuel properties competitive with coal.

The Role of Accidental and Therapeutic Hypothermia in Non-Fatal Drowning

A case of non-fatal drowning with a successful outcome despite a submersion time of 25 min is described. Our case report emphasizes the role of accidental hypothermia in the survival of drowning victims with hypoxic brain injury, and supports the use of therapeutic hypothermia in the resuscitation of these patients.

3D printed biocompatible enclosures for an implantable DBS microdevice

A number of methods have been used to make electronic medical microdevices biocompatible. This paper presents a novel approach for design and fabrication of biocompatible silicone enclosures for implantable medical microdevices. The approach involves design and formation of a 3D model of the enclosure using a computer-aided design software tool, followed by 3D printing of the enclosures using a bioplotter. Three different implantable enclosure designs are presented. The fabrication of the three enclosures is given. An evaluation of the suitability of the enclosures for implantation of a deep brain stimulation microdevice is discussed through submersion and operation tests. The evaluation results are presented and discussed.

Fabrication of biocompatible enclosures for an electronic implant using 3D printing

A variety of different approaches have been employed to enableimplantation of electronic medical microdevices. A novel method of producing low-cost, rapidly fabricated implantable enclosures from biocompatible silicone is presented in this paper. This method utilises 3D computer-aided design software to design and model the enclosures prior to fabrication. The enclosures are then fabricated through additive manufacturing from biocompatible silicone using a 3D bioprinter. In this paper, four different implantable enclosure designs are presented. A prototyping stage with three different prototypes is described, these prototype enclosures are then evaluated through submersion and operation tests. A final design is developed in response to the obtained results, and then evaluated in a long term temperature controlled submersion test. The evaluation results are presented and discussed.Several areas of future works are identified and discussed.

Proposta de valorização de espaço aberto público da aldeia da Luz

A construção da barragem do Alqueva causou várias transformações na paisagem ao nível sócioeconómico e ecológico. A submersão da antiga aldeia da Luz foi resultado desta construção, com consequente construção de uma nova aldeia. Um acontecimento que é marcante na história do Alqueva. O objetivo do trabalho de projeto é valorizar os espaços abertos públicos da nova aldeia e espaço envolvente. Esta estratégia assentou no reconhecimento e valorização dos sistemas ecológicos e culturais aí presentes, e na valorização do potencial turístico que lhe está associada. A metodologia do trabalho inclui uma análise das aldeias e realização de um inquérito à população (habitantes, residentes ocasionais e visitantes) com o fim de melhor responder aos seus anseios no presente. O trabalho culmina com a Proposta de Valorização de Espaço Aberto Público para a aldeia da Luz e espaço próximo envolvente e com o Plano de Estrutura Ecológica e Cultural (urbana e rural); Aldeia da Luz: towards the open public spaces valorization ABSTRACT: The construction of the Alqueva dam has caused several landscape transformations, in the socioeconomical, ecological matter. The submersion of the old Luz village was a direct result of this construction, with the consequent construction of a new Luz village. An event, which is remarkable in the Alqueva history. The project work objective is to value the public open spaces of the new village and its surrounding space. This strategy settled on the recognition and appreciation of the existing ecological and cultural systems, and in the touristic potential that is associated with it. The work methodology includes analysis of the villages and a survey fulfilment targeting the population (habitants, occasional residents and visitors) with the intent of better answering their current desires. The work culminates with the Public Open Space Appreciation Proposal for the Luz village and nearby surrounding space, and with the Ecological and Cultural Structures Plan (urban and rural).