16 research outputs found
De legitimiteit van het Masterplan: Een onderzoek naar gebruik en mogelijkheden
No full textAbstract not availableArchitectur
Gebouwenscan voor het nieuwe werken in bestaande kantoorgebouwen
No full textDit onderzoek is gefundeerd op het samenbrengen van twee maatschappelijke problemen. Allereerst is er de komst van hnw. Er is geen concrete informatie over de invloed van hnw op het Nederlandse kantorenvastgoed. Dit probleem wordt beantwoord, door te onderzoeken welke huisvestingskenmerken er een belangrijke en onderscheidende rol spelen voor hnw. Daarmee richt dit onderzoek zich op het kwalitatieve aspect van dit probleem. Dus zal hnw de kwaliteitseisen voor kantoorruimte veranderen, en zo ja hoe? Aan de andere kant is er de Nederlandse kantorenleegstand die steeds grotere vormen aanneemt. Anno 2012 is de kantorenleegstand gestegen tot 15,4 procent van de totale Nederlandse kantoorvoorraad (NOS, 2012). Door het samenstellen van een gebouwenscan voor hnw, probeert dit onderzoek in te spelen op deze twee problemen. Door het toetsen van bestaande kantoorgebouwen aan hun geschiktheid voor hnw, kunnen eventuele knelpunten worden onderzocht en aangepast. Wanneer hnw wordt toegepast in bestaande kantoorgebouwen, kan eventuele nieuwbouw van kantoren worden voorkomen.Corporate Real Estate ManagementReal Estate & HousingArchitectur
Experimental Fluid-Structure Interaction of a Flexible Plate Under Gust Excitation: A Wind-tunnel Investigation by Means of Robotic Volumetric PIV
No full textThe reduction of atmospheric pollutants emission is one of the biggest challenges of modern aeronautical industry. This is testified by the commitment of international institutions such as the European Commission, with its \textit{Flightpath 2050} document issued in 2011, and by research organization such as NASA, with its \textit{Fixed Wing} project. This attention towards the reduction of fuel burn and consequently of emissions constitutes a drive towards the employment of lightweight aerospace structures, leading in this way to the rise of a variety of so-called aeroelastic problems. Despite the many progresses made in the development of numerical tools for the prediction of aeroelastic phenomena, some aspects still constitute a challenge in the computational field and as a consequence wind-tunnel testing remains an important tool for the study of aeroelastic problems.Modern aeroelastic models employed in wind-tunnel tests are usually heavily instrumented in their inside in order to host common measurement devices such as pressure sensors, accelerometers and strain gauges. These devices provide accurate experimental data for the characterization of both flow and structure, however they are not ideal both in terms of structural intrusiveness and in terms of the complexity of the model’s instrumentation phase. At this purpose, optical metrology offers a valid alternative for both flow and structural measurements. In particular, quantitative flow visualization techniques such as Particle Image Velocimetry (PIV) allow for a thorough characterization of flow fields which for certain aspects results superior to more traditional point-wise measurements. A literature survey on the combination of PIV with optical structural measurements for Fluid-Structure Interaction (FSI) experiments reveals how volumetric flow measurements are almost never carried out. Since a large variety of aeroelastic phenomena involves the presence of 3D unsteady flows and large scale structures, a gap in the simultaneous assessment of volumetric flow fields and of structural displacements emerges from the literature review. Besides this, it is observed how at least two systems are always used to obtain quantitative measurements of both flow and structure, leading to complex setups with challenges related to both the synchronization and the optical isolation of the two systems. In the field of large-scale aerodynamic testing, the introduction of Helium Filled Soap Bubbles (HFSB) as flow tracers for PIV measurements and the development of efficient particle tracking algorithms such as Shake-the-Box (STB) have enabled a substantial extension of the achievable measurement domain at an affordable computational cost. The development of Robotic Volumetric PIV has allowed to exploit even further the potential of HFSB and STB, revealing a capability of volumetric measurements in domains of several cubic meters. Furthermore, being based on particle tracking, Robotic Volumetric PIV appears as a good candidate for the tracking of markers on a structure and thus for the realization of aeroelastic measurements where a 3D flow and a large structure are characterized with a single measurement system. The aim of this work is then to assess the feasibility of Robotic Volumetric PIV for aeroelastic investigations. This is achieved studying the dynamic response of a flexible aluminium plate subjected to gust excitation. The experiment is carried out in the Open Jet Facility at Delft University of Technology, which is equipped with a gust generator. Phase-averaged structural displacement of the entire plate together with the volumetric near flow field is measured, with a total measurement volume of approximately 150 litres. Small circular markers are applied to the surface of the plate in order to carry out the structural measurement, which is validated by means of a Scanning Vibrometer. The assessment of the FSI phenomenon is conducted at a wind-tunnel speed of 12 m/s and at a reduced frequency of 0.045. In this way, the capability of Robotic Volumetric PIV to deliver unprecedented quantitative volumetric flow visualization coupled to the measurement of structural displacement over large scales is demonstrated. The challenges faced to achieve such objective include the possibility to distinguish between flow particles and structural markers in the acquired images, the validity of the instantaneous structural displacements measured by the PIV system, the feasibility of the phase-average approach and the consistency of the combined structural and flow information. A visualization of the FSI phenomenon is finally presented, together with a quantitative analysis of its dynamics.The reduction of atmospheric pollutants emission is one of the biggest challenges of modern aeronautical industry. This is testified by the commitment of international institutions such as the European Commission, with its \textit{Flightpath 2050} document issued in 2011, and by research organization such as NASA, with its \textit{Fixed Wing} project. This attention towards the reduction of fuel burn and consequently of emissions constitutes a drive towards the employment of lightweight aerospace structures, leading in this way to the rise of a variety of so-called aeroelastic problems. Despite the many progresses made in the development of numerical tools for the prediction of aeroelastic phenomena, some aspects still constitute a challenge in the computational field and as a consequence wind-tunnel testing remains an important tool for the study of aeroelastic problems. Modern aeroelastic models employed in wind-tunnel tests are usually heavily instrumented in their inside in order to host common measurement devices such as pressure sensors, accelerometers and strain gauges. These devices provide accurate experimental data for the characterization of both flow and structure, however they are not ideal both in terms of structural intrusiveness and in terms of the complexity of the model’s instrumentation phase. At this purpose, optical metrology offers a valid alternative for both flow and structural measurements. In particular, quantitative flow visualization techniques such as Particle Image Velocimetry (PIV) allow for a thorough characterization of flow fields which for certain aspects results superior to more traditional point-wise measurements. A literature survey on the combination of PIV with optical structural measurements for Fluid-Structure Interaction (FSI) experiments reveals how volumetric flow measurements are almost never carried out. Since a large variety of aeroelastic phenomena involves the presence of 3D unsteady flows and large scale structures, a gap in the simultaneous assessment of volumetric flow fields and of structural displacements emerges from the literature review. Besides this, it is observed how at least two systems are always used to obtain quantitative measurements of both flow and structure, leading to complex setups with challenges related to both the synchronization and the optical isolation of the two systems. In the field of large-scale aerodynamic testing, the introduction of Helium Filled Soap Bubbles (HFSB) as flow tracers for PIV measurements and the development of efficient particle tracking algorithms such as Shake-the-Box (STB) have enabled a substantial extension of the achievable measurement domain at an affordable computational cost. The development of Robotic Volumetric PIV has allowed to exploit even further the potential of HFSB and STB, revealing a capability of volumetric measurements in domains of several cubic meters. Furthermore, being based on particle tracking, Robotic Volumetric PIV appears as a good candidate for the tracking of markers on a structure and thus for the realization of aeroelastic measurements where a 3D flow and a large structure are characterized with a single measurement system. The aim of this work is then to assess the feasibility of Robotic Volumetric PIV for aeroelastic investigations. This is achieved studying the dynamic response of a flexible aluminium plate subjected to gust excitation. The experiment is carried out in the Open Jet Facility at Delft University of Technology, which is equipped with a gust generator. Phase-averaged structural displacement of the entire plate together with the volumetric near flow field is measured, with a total measurement volume of approximately 150 litres. Small circular markers are applied to the surface of the plate in order to carry out the structural measurement, which is validated by means of a Scanning Vibrometer. The assessment of the FSI phenomenon is conducted at a wind-tunnel speed of 12 m/s and at a reduced frequency of 0.045. In this way, the capability of Robotic Volumetric PIV to deliver unprecedented quantitative volumetric flow visualization coupled to the measurement of structural displacement over large scales is demonstrated. The challenges faced to achieve such objective include the possibility to distinguish between flow particles and structural markers in the acquired images, the validity of the instantaneous structural displacements measured by the PIV system, the feasibility of the phase-average approach and the consistency of the combined structural and flow information. A visualization of the FSI phenomenon is finally presented, together with a quantitative analysis of its dynamics.Aerospace Engineerin
PROBLEMS IN DIAGNOSING ODONTOGENIC MYXOMA: CASE REPORT
No full textTumours and tumour-like growths arising from odontogenic tissues constitute a heterogenousgroup of lesions whose diagnosis can be particularly challenging on the part of both surgeons andpathologists. In children, these lesions are even more difficult to clinically and histopathologicallydiagnose definitively because of the concurrent diverse embryologic differentiation of dentaltissues. A case is presented of a 12 year-old boy who was subjected to inappropriate primarymanagement of a left mandibular mass, due apparently to inadequate consultation to establishan accurate diagnosis
On the combined flow and structural measurements via robotic volumetric PTV
No full textThis study describes a novel measurement approach for combined flow and structural measurements in wind tunnels using robotic volumetric particle tracking velocimetry (PTV). The measurement approach is based on the application of a particle tracking algorithm on images including flow or structure tracers, where the latter are implemented by means of fiducial markers. The main steps of the measurement procedure comprise the simultaneous acquisition of flow and structure tracers in the same images, the distinction of the tracers leading to separate flow and structure image sets, the application of Lagrangian particle tracking and the further post-processing, and recombination of the obtained data. The approach is applied to the fluid-structure interaction between a flexible plate with a span of 1.2 m and a periodic gust. The total measurement volume amounts approximately to 150 liters. A phase-averaged description of the FSI problem is presented, with the focus on the effects of the spatio-temporal averaging of the flow information. The structural displacements obtained from the PTV system are validated against a scanning vibrometer. The phase-averaged displacement of the markers is also analyzed, assessing both the validity of the phase-averaged approach and the physical coherence of their motion with respect to a structural model of the plate. It is found that robotic volumetric PTV is suitable for the measurement of large-scale structural displacements, while it should not be used to measure small-scale vibrations. Finally, a visualization of the combined measurement is presented, together with an analysis of the consistency between the measured structure and flow field. AerodynamicsAerospace Structures & Computational Mechanic
The pattern and occurrence of ameloblastoma in adolescents treated at a university teaching hospital, in Kenya: A 13-year study
No full textExperimental investigation of the fluid-structure interaction between a flexible plate and a periodic gust by means of Robotic Volumetric PIV
No full textIn the present work Robotic Volumetric PIV is applied in a Fluid-Structure Interaction (FSI) investigation. The case studied involves the dynamic response of a flexible aluminium plate subjected to gust excitation. The experiment is carried out in the Open Jet Facility at Delft University of Technology, which is equipped with a gust generator. Phase-averaged structural displacement of the entire plate together with the volumetric near flow field is measured, with a total measurement volume of approximately 150 litres. Small circular markers are applied to the surface of the plate in order to carry out the structural measurement, which is validated by means of a Scanning Vibrometer. The assessment of the FSI phenomenon is conducted at a wind-tunnel speed of 12 m/s and at a reduced frequency of 0.045. The main aim of this experimental investigation is to demonstrate the capability of Robotic Volumetric PIV to deliver unprecedented quantitative volumetric flow visualization coupled to structural displacement measurement at large scales. The challenges faced to achieve such an objective include the possibility to distinguish between flow particles and structural markers in the acquired images, the validity of the structural displacements measured by the PIV system, the feasibility of the phase-average approach and the consistence of the combined structural and flow information. A visualization of the FSI phenomenon is presented, together with a quantitative analysis of its dynamics.AerodynamicsAerospace Structures & Computational Mechanic
Design and testing of aeroelastically tailored composite wing under fatigue and gust loading including effect of fatigue on aeroelastic performance
No full textThe aim of the paper is to experimentally validate a numerical design methodology for optimizing composite wings subject to gust and fatigue loading requirements and to assess the effect of fatigue on the aeroelastic performance of the wing. Traditionally, to account for fatigue in composite design, a knockdown factor on the maximum stress allowable is applied, resulting in a conservative design. In the current design methodology, an analytical fatigue model is used to reduce the conservativeness and exploit the potential of composite materials. To validate the proposed analytical model, a rectangular composite wing is designed and manufactured to be critical in strength, buckling and fatigue. An experimental campaign comprising wind tunnel and fatigue tests is performed. In the wind tunnel, both static and dynamic aeroelastic experiments are conducted to validate the numerical dynamic aeroelastic model. The fatigue test is used to validate the analytical fatigue model and to understand the effect of fatigue on aeroelastic properties of the wings. The results from experimental campaign validated both the aeroelastic predictions as well as fatigue predictions of the numerical design methodology. However the fatigue process resulted in degradation of the wing stiffness leading to change in the aeroelastic response of the wing. </p
Faith in the Center of Formation and Life of Religious Groups – Works by Sister Halina Wrońska F.M.A.
No full textShifting the stress from the service of the word to evangelization, and in this context showing the tasks of catechesis, faced the new Polish realities: on the one hand the presence of religion lessons at school, and on the other – cultural pluralism being suddenly created, questioning all the authorities. Hence, a catechetic problem appeared: how to form catechesis so that it could meet these threats? This is an important area of research done by Sister H. Wrońska. Theology and methodology of the functioning of coeval groups built especially on the basis of the catechetic documents of the Catholic Church and of the Church in Poland that are published have led the author to working out rules and norms of cooperation between catechetic groups and of various forms of catechization.
Sister H. Wrońska’s work Katecheza a małe grupy szkolne i parafialne (Catechesis and small school and parish groups) appears to be an extraordinarily valuable and important book, not only for catechetics, pedagogy, but for all kinds of pastoral activities as well. It is the first work in Poland that comprehensively shows this pastoral-catechetic problem, and shows in an ordered and at the same time detailed way the character and significance of groups of children and young people for the development of catechesis. Documenting this issue is indeed invaluable for all those who will ever study the complementary correlation of educational circles and write anything about it
Tavares Bastos: a liberdade política a partir da descentralização
Get PDFDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Jurídicas, Programa de Pós-Graduação em Direito, Florianópolis, 2012.Nesse trabalho será explorada a ideia de descentralização política e administrativa no Brasil no período do Segundo Reinado, no pensamento político de Tavares Bastos. Esse autor inova ao apresentar uma proposta de reforma que pretende solucionar de forma conjunta os problemas políticos e sociais de sua época. Questões como a educação, a abolição da escravidão, a imigração estrangeira, a liberdade de cabotagem, são alguns dos temas levantados pelo autor nesse sentido. Pretendia propor um modelo de Estado que tinha como principal objetivo o desenvolvimento moral e material do país. Para tanto adotou a via da descentralização política e administrativa, como forma de promoção de uma política voltada para a liberdade, preocupada com a sorte do povo e comprometida com o desenvolvimento do país. Assim, pretendeu-se relacionar os direitos fundamentais defendidos e promovidos pelo autor para demonstrar que a descentralização aparece como aspecto fundamental para o exercício da liberdade e à promoção do progresso. Abstract: In this paper we explore the idea of political and administrative decentralization in Brazil during the Empire, the political thoughts of Tavares Bastos. This author innovates to propose a reform intended to address jointly the political and social problems of his time. Issues such as education, the abolition of slavery, foreign immigration, freedom of cabotage between ports, are some of the issues brought by the author in this regard. He intended to propose a model of state which had as main objective the moral and material development of the country. For both adopted the path of political and administrative decentralization as a way of promoting a political freedom, worried about the fate of the people and committed to the development of the country. Thus, we sought to relate the fundamental rights protected and promoted by the author to demonstrate that decentralization appears as a fundamental aspect to the exercise of freedom and the promotion of progress
