361 research outputs found
Rektor C.J.L. Almqvist och personlighetsprincipen
No full textPrincipal C.J.L. Almqvist and the principle of personality The Swedish author and visionary Carl Jonas Love Almqvist (1793–1866) was the principal for twelve years (1829–1841) of the government-initiated pilot school ”Nya Elementarskolan” (New Elementary School) in Stockholm. In this position, he argued that both the school and the state should be built on the same basic idea: the right of individual freedom. This argument is often referred to as ”personlighetsprincipen” (the principle of personality), a concept launched by another prominent figure of the liberal culture of the time, Erik Gustaf Geijer (1783–1847). This article explores how the principle of personality is expressed in the texts of Almqvist and is mainly built upon the concept’s allegorical resources. It examines the thesis that Almqvist’s use of the term is best understood if one distinguishes between the political, pedagogical, and existential dimension of the concept. The article ends with some thoughts about the context of the concept and a discussion on whether Almqvist had a greater interest in personalities than in principles
Rektor C.J.L. Almqvist och personlighetsprincipen
No full textPrincipal C.J.L. Almqvist and the principle of personalityThe Swedish author and visionary Carl Jonas Love Almqvist (1793–1866) was the principal for twelve years (1829–1841) of the government-initiated pilot school ”Nya Elementarskolan” (New Elementary School) in Stockholm. In this position, he argued that both the school and the state should be built on the same basic idea: the right of individual freedom. This argument is often referred to as ”personlighetsprincipen” (the principle of personality), a concept launched by another prominent figure of the liberal culture of the time, Erik Gustaf Geijer (1783–1847). This article explores how the principle of personality is expressed in the texts of Almqvist and is mainly built upon the concept’s allegorical resources. It examines the thesis that Almqvist’s use of the term is best understood if one distinguishes between the political, pedagogical, and existential dimension of the concept. The article ends with some thoughts about the context of the concept and a discussion on whether Almqvist had a greater interest in personalities than in principles
Doublet deployment strategies for geothermal Hot Sedimentary Aquifer exploitation: Application to the Lower Cretaceous Nieuwerkerk Formation in the West Netherlands Basin
No full textHuge amounts of heat are stored in sedimentary aquifers in the Dutch subsurface. The amount of heat would be sufficient to provide our national heat demand for decades without any greenhouse gas emissions. Exploitation of this type of resource started some 10 years ago in the Netherlands. In 2016, 16 geothermal doublet systems had been installed that produce geothermal heat, and each year 2 to 3 new systems are realised. A doublet system consists of a production well that extracts hot formation water from kilometer deep aquifers. After the heat is extracted from the water in heat exchangers, the cooled water is reinjected into the same aquifer at approximately 1 to 1.5 km distance from the production well. Most of the current Dutch doublet systems provide heat for the horticulture sector. These systems have an average net energy production of approximately 10 MWth and therefore hundreds of additional systems are required to significant amounts of our heat consumption with geothermal energy. This PhD thesis investigated doublet system design and deployment strategies to optimise exploitation and increase the possible number of doublet systems exploiting the same aquifer. Based on detailed geological models, subsurface flow simulations are used to evaluate parameters such as required injector-producer distance, the preferred orientation of a well pair with respect to geological trends and required doublet distance to avoid negative interference. Based on the results, regional doublet deployment strategies can be developed to make optimal use of geothermal heat from sedimentary resources
The influence of fluvial reservoir architecture on geothermal energy production in Hot Sedimentary Aquifers
No full textCurrently six geothermal doublets are realized in the WNB. Five of these doublets target the same Lower Cretaceous fluvial sandstone interval, the Nieuwerkerk Formation. About 40 exploration licences are granted. Many of them also have sandstones in the same fluvial interval, the Nieuwerkerk Formation as a target. To successfully and efficiently produce geothermal energy from this fluvial sandstone interval, the distribution and internal architecture of the sandstone bodies must be better understood.Fluvial sandstone reservoirs are composed of stacked meander belts and floodplain fines. Net-to-gross, orientation and stacking pattern of the channel belts is of major importance for the connectivity between the injection and production wells in fluvial sandstone reservoirsApplied Geolog
Livet efter romantiken : Ellen Keys levnadskonst i relation till C.J.L. Almqvist
No full textThis study explores the aesthetical and political connections between Ellen Key (1849–1926) and C.J.L. Almqvist (1793–1866). It also analyzes the standing of romanticism in Sweden around the year 1900. While Key’s interest in Almqvist is well documented, notably in the lecture where she dubs him Sweden’s most modern author, their deeper affinities and differences have not been fully appreciated. A common thread in their works is the desire to blur the lines between art and life, which serves as a starting point for analysis. Both Almqvist and Key seek to create an art of living that revitalizes individuals through aesthetic means, proposing various techniques to infuse everyday life with beauty and sacredness. For both, the concept of a ‘beautiful’ life is likewise a measure of humanity. The study also highlights the contentious aspects of Key’s relationship with Almqvist. Key believed that the idealistic worldview of the early 19th century had been realized through new scientific discoveries, allowing her to rhetorically maneuver beyond the horizon of romanticism in search of a modernity more modern than Almqvist’s
Static reservoir architecture modelling of the TAGS, Algeria
No full textThis project investigated the occurrence of compartmentalization by claystone interbeds and its impact on connectivity in the fluvial units of the Triassic Argilo-Gréseux Supérieur (TAGS) formation in the Toual field, Algeria. The TAGS is located in a N-S oriented anticline, with faults part of a flower structure acting as hydrocarbon migration paths, and consists of two distinct formations based on facies. The fluvial TAGS Sandy, which consists of 4 different units, has compartmentalization in especially the meander deposited Sandy 2 and Sandy 4 units whilst Sandy 1 and 3, deposited coastal sabkha and by a braided river system respectively, show excellent connectivity. The coastal sabkha Upper TAGS, consisting of 7 units, shows excellent connectivity for Upper 1, 3, 5 and 7 in its sheet sands except for the deltaic deposited Upper 2 which is highly compartmentalized. The Upper 4 and 6 claystones might act as additional hydrocarbon seals to the overlying Liassic evaporites. A conceptual static reservoir model was created in Petrel to learn more about the size, shape and spatial distribution of the compartments. This was done by creating correlation panels parallel and perpendicular to the SW-NE orientation of the TAGS channel belt. Stratigraphic interpretation based on gamma ray, density and sonic logs as well as core photographs was used to divide the TAGS formation into separate units which were linked by reoccurring claystone intervals. This provided an insight into local fluvial channel belt shifts, mean sea level change and humidity levels. A 3D model was created of these units which was consequently used to estimate the Gas Initially In Place (GIIP) volume.Applied GeologyGeoscience & EngineeringCivil Engineering and Geoscience
Flooding observations in Rotterdam: mapping of flood-prone locations, flood vulnerability and risk analysis
No full textThis thesis focuses on identifying flood-prone locations, flood vulnerability and analyzing risk for the Municipality of Rotterdam. Municipal call center data of flooding complaints from 2012-2016 are investigated to identify the most flood-prone locations, which are called hot spots. This is performed by creating heat maps of the flooding record locations. The most dominant hot spots for multiple analyses are all situated in the sub districts of ‘Rotterdam Centrum’, ‘Delfshaven’ and ‘Noord’. Most flooding records are related to gully pots (≈55%), followed by sewer related problems (≈20%). Flood vulnerability is investigated by analyzing the influence of amount of inhabitants and degree of imperviousness on the hot spot locations. Both factors are involved in the origin of the hot spots. Investigating the influence of rainfall on flooding incidents pointed out an exponential relationship. From comparing differences in resulting flooding records for heavy/extreme rainfall events and cloudbursts, it can be concluded that Rotterdam’s drainage system is better capable at handling short heavy bursts of rainfall than consecutive hours of rainfall. The influence of seasonality on flooding incidents has also been investigated. There do appear to be seasonal patterns, which can be linked to blockages of gully pots by leave fall. In the risk & asset management analysis, asset maps related to infrastructure are created. They are used to calculate risk levels, based on the company values matrix of the Water Management department of Municipality of Rotterdam. The lower elevation of Rotterdam’s city center and surrounding downward slopes, which have been identified from the created elevation map, might contribute to the increased flood vulnerability and hot spots in the city center area.Civil Engineering and GeosciencesWater ManagementWater Resource Managemen
Study of the Lower Cretaceous sands in the Van den Bosch Geothermal energy concession
No full textGoal of this project was to get a better understanding of the producing formations in the two doublets in the Van den Bosch Geothermal energy concession in Bleiswijk. It can be concluded based on the GR logs in VDB-04, the lithologs, End Of Well reports, a Biostrat log in VDB-04 and the seismic interpretation that the first doublet (VDB-01 & VDB-02) produces from a combination of the Rijswijk Member and another aggradational stacked sand formation. The second doublet (VDB-03 & VDB-04) produces from the Delft Sandstone. It is expected that producer and injector in each doublet have good communication and interference between the doublets is absent because the reservoirs are separated by the Rodenrijs Shale and production pressures and rates are constant for years. A regional well log correlation based on Maximum Flooding Surfaces is carried out to put the interpretation of the reservoir sands into a regional context with the surrounding oil fields. Using seismic interpretation the thickness and lateral extension of the Rijswijk and Delft reservoirs is determined. With these interpretations a static model is built of the reservoirs of the two doublets. In the second part of the project, field data from the past four years of production is analysed. The data consists of production rates, pump pressures and a well test in VDB-01. Using a Monte Carlo simulation ranges of the average permeability are calculated. The ranges of the average permeability are 200-500 mD in the Rijswijk and 300-600 in the Delft Sandstone. The main uncertainties in these estimated ranges are the Flowing Bottom Hole Pressure (FBHP) calculations, the skin and the thickness of the formation. In a history match exercise, production is simulated in a Dynamic model in Eclipse 100. The tuning parameter is the average horizontal permeability. In addition the influence on the simulation results of the vertical permeability, the skin and the fluvial shape factors is investigated. Resulting ranges of the average horizontal permeability are similar to those calculated with the radial inflow Monte Carlo simulation: 100-300 mD for the Rijswijk and 300-400 mD for the Delft Sandstone. Simulations show that the vertical permeability has a large influence on the reservoir performance and is therefore an important uncertainty. An initial estimation of the Rijswijk kvertical is 70% of Khorizontal and 22/386*khorizontal in the Delft Sandstone. This is based on earlier studies. Especially in the Rijswijk situation, the estimate may be too large. If the vertical permeability decreases, the horizontal permeability should increase to compensate in the history match. In that case the average permeability range approaches the results from the radial inflow equation analysis more. The well test was plagued by wellbore effects and a too short build-up period. Therefore no reliable parameters could be derived and compared to the radial inflow analysis and history match results. However the analysis showed that a well performed well test could give insight in skin, average permeability and flow boundaries.Petroleum EngineeringGeoscience & EngineeringCivil Engineering and Geoscience
Years of Good Life Based on Consumption and Health::A Practical Well-Being Metric for Economic Evaluation
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