76 research outputs found
Jacopo Strada and Cultural Patronage at The Imperial Court (2 Vols.)
No full textDirk Jacob Jansen provides an overview of the life and career of the sixteenth-century cosmopolitan courtier, architect and antiquary Jacopo Strada. Readership: All interested in Austrian and Italian Renaissance archtecture, art and antiques trade, court life, and the transmission of ideas to North and Central Europe
Jacopo Strada and Cultural Patronage at The Imperial Court (2 Vols.)
No full textDirk Jacob Jansen provides an overview of the life and career of the sixteenth-century cosmopolitan courtier, architect and antiquary Jacopo Strada. Readership: All interested in Austrian and Italian Renaissance archtecture, art and antiques trade, court life, and the transmission of ideas to North and Central Europe
Jacopo Strada et le commerce d'art
No full textJansen Dirk Jacob, Coignard Jerôme. Jacopo Strada et le commerce d'art. In: Revue de l'Art, 1987, n°77. pp. 11-21
Emperor Ferdinand I and the Antique: the Antique as Innovation
No full textThis paper proposes an approach to the study of the attitude towards antiquarian studies and the use
of the antique example in the patronage of art at the court of Emperor Ferdinand I
Proceedings of a Theme Day on Early Modern Knowledge on Numismatics at the Gotha Research Centre (University of Erfurt)
No full textDas Forschungszentrum Gotha der Universität Erfurt widmete den 18.01.2024 als Thementag den Ergebnissen aktueller Forschungen zum frühneuzeitlichen Wissen über Münzen: Dabei ging es um die großformatigen Münzzeichnungen und die Münzbeschreibungen des Antiquars Jacopo Strada aus dem 16. Jahrhundert, die von Volker Heenes und Dirk Jacob Jansen untersucht worden sind; um die Bedeutung der Numismatik als Stimulus avantgardistischer gelehrter Unternehmungen im 17. und 18. Jahrhundert, die Martin Mulsow erforscht hat; sowie um eine wissenschaftlich-polemische Auseinandersetzung um die Frage nach der Echtheit einer vermeintlich antiken Münze im Wien des 18. Jahrhunderts, deren Hergang von Bernhard Woytek rekonstruiert wurde.On January 18th 2024, the results of current research projects on coins as objects of early modern knowledge were presented at the Gotha Research Centre of the University of Erfurt: topics were the coin drawings and descriptions executed by the antiquarian Jacopo Strada in the 16th century, which have been studied by Volker Heenes and Dirk Jacob Jansen; the impact of numismatics on the research of avantgardistic erudites in the 17th and 18th century, which has been investigated by Martin Mulsow; and a polemic scholarly argument about the authenticity of an arguably antique coin, which took place in 18th century’s Vienna and has been reconstructed by Bernhard Woytek
Land subsidence related damage to residential real estate and cost-effective adaptation strategies: From sinking to solutions: a methodological approach to assess the cost-effectiveness of adaptation strategies to counteract land subsidence related damage to residential real estate
No full textLand subsidence poses significant damage risks to residential real estate, including pile rot, differential settlements, pluvial flood risk, and dewatering risk amounting tens of thousands of euros. In the Netherlands, the number of affected houses has surpassed one million and is estimated to reach two million, accounting for a quarter of all houses in the country. Without an action perspective homeowners are left to their own devices which this research shows can lead to postponing action until risks materialize. To mitigate these risks, multiple adaptation strategies are available. This thesis focuses on determining the cost-effectiveness of two general pathways for residential real estate constructed with either a wooden pile foundation or a shallow foundation: renovating existing houses or replacing them entirely. The study also investigates whether incorporating additional measures aimed at improving overall benefits such as increasing the amount of living space or transitioning towards a more sustainable house with energy label A, is cost-effective by comparing the costs and benefits associated with the adaptation strategies. When the benefits outperform the costs the strategy is labelled favourable. Through a comprehensive analysis, this research provides valuable insights into economically viable approaches for addressing land subsidence-related risks in residential real estate in relation to the location specific characteristics. It proves additional measures are required to make either renovation or replacement a cost-effective adaption strategy. Two options are shown to be cost-effective. Firstly, renovation including additional investments to increase square meters of living space and transitioning to an energy performance A-label. Secondly, replacement including densification by building back more square meters of living space, increasing the amount of houses or a combination of the two. Both require large investments resembling around 75% to 150% of the current housing price respectively. Increasing the amount of square meters even further improves the result however this increasingly affects the character of the neighbourhood and its social composition. With these results, this thesis hence provides an action perspective to homeowners and stakeholders including policy makers and financial institutions by means of a solution space to address land subsidence in an economically favourable way, whilst simultaneously reflecting on the differences in implications for the parties involved.Civil Engineering | Hydraulic Engineering | Hydraulic Structures and Flood Ris
Quantifying the ranges of feasible control strategies for reservoir lifecycle optimization
No full textModel based optimization of reservoir water flooding is an ill-posed problem where significantly different control strategies deliver near identical Net Present Values (NPVs). Discovering and exploiting the existence of "redundant" control strategies - particularly those in close proximity to an optimal strategy - is valuable since this offers operational flexibility in reservoir management. To identify such 'flexible strategies' this thesis proposes a workflow to characterize the space of feasible solutions. The feasible region or feasible solution space consists of all control strategies that deliver an NPV within some threshold from an optimal value. Ensemble-based optimization is performed with strong Wolfe line search to identify an optimal control strategy. The BFGS scheme is used to iteratively approximate the Hessian matrix. One dimensional exploration is performed along the singular vector directions that characterize the null space of the Hessian. A thorough exploration results in an accurate characterization of the feasible region. Such an approach however is computationally intractable in case of realistic reservoirs with multiple hundred controls. To address this, a high-dimensional polytope is first defined using the end points from the exploration step. Subsequently, an innovative cross-section constrained maximum volume ellipsoid is inscribed within this polytope to generate an ellipsoidal approximation of the feasible region. Validation results are then presented which show that even one ellipsoid centred at the optimum control vector coordinate provides a conservative description of the feasible solution space.Applied Earth Science
The effects of heterogeneities on the economics of thin gas column reservoirs
No full textAfter decades of successful exploration and exploitation of gas fields in the Netherlands, the Dutch E&P industry has accumulated a substantial portfolio of gas fields that are considered economically unviable, the so-called ‘stranded fields’. There are various reasons for a gas field to be classified as economically unviable, one of them being the small size of the field. With the current challenges the E&P sector is facing it is valuable to re-evaluate the criteria often used in determining a fields economic viability. One of those criteria is the column height encountered in the well, which when it becomes too small can be very sensitive to water inflow. Gaining further understanding of the relation between gas column height and gas production can be valuable in determining the potential of a gas field with a limited gas column. Consequently, the focus of this study is twofold: 1) finding the minimum gas column height required for producing a sufficient amount of gas (0.1 – 0.2 BCM) and 2) investigating the effect of specific important reservoir heterogeneities (i.e. high-permeability streaks and clay layers) on the production results (total gas production and production time). These two research topics were approached through two separate methods: 1) a sensitivity study carried out using two types of models, a simple box model and a complex reservoir model and 2) an analysis of gas wells, and the corresponding gas reservoirs, that encounter small gas columns. Both research methods are focused on Rotliegend gas reservoirs. The results from this study show that the minimum gas column range for yielding economic gas production was found to be 20 – 40 m, depending on the field’s characteristics and configurations. Furthermore, in the models used for this study the presence of a highpermeability streak may either cause an increase or decrease in the total gas production, however they are found to significantly reduce the production time which is beneficial towards the economic analysis of a potential project. Additionally, they are found to be highly beneficial in gas reservoirs with a low average permeability. The clay layer on the other hand, significantly increases the total gas production of the models, although this is accompanied by an increase in the total production time. A potential downside of the clay layer is the restricted flow of gas which is particularly problematic in horizontal reservoirs with a significant portion of the gas column situated below the clay layer. Lastly, a possibly positive correlation between transition zone and the total gas production from thin gas columns reservoirs was found in the well analysis, on which further investigation is recommended in order to be able to draw more meaningful conclusions.Applied Earth Science
Comparison of Multi-Model History Matching Methods
No full textThe oil industry is a high risk high reward venture. The capital and operating expenses runs into tens of millions of dollars with oil production being the primary source of revenue. During the initial development phase of the field, few wells are completed. Data collection during this period verifies assumptions made during the modelling phase and forms the basis for future development. History matching can play a significant role in these plans since it can determine uncertainties in future production. History matching algorithms must be able to make an accurate estimates of uncertainty in future production while being computationally light. Towards this end, a number of history matching methods have been developed with emphasis being on the ensemble Kalman filter (EnKF) in recent times. While the variants of the EnKF seek to improve different aspects of the method, few have been successful in addressing all of these concerns. The Distributed Gauss Newton (DGN) was developed with the same goal- accurate uncertainty prediction at low computational cost. It is not a variant of the EnKF but uses a sensitivity matrix determined through linear regression which decreases the computational load compared to existing gradient based techniques. In their tests, the authors report superior performance of the DGN compared to a Gauss-Newton scheme. This thesis aims to provide a detailed understanding of the method and its dependencies. This is followed up with a comparison of the DGN with an EnKF variant known as the ES-MDA.Applied Earth Science
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