14,555 research outputs found
Monumentorum sepulchralium consideratio ad L. 42. ff. de Religiosis et sumptibus funerum exhibens
No full textquam ... pro consequendis summis in utroque iure honoribus, privilegiis atque immunitatibus doctoralibus more maiorum publicae & solemni eruditorum submittit censurae Albertus Meyer, Bremensis Saxo ad diem X. mensis Decembris a. M DC LXXIII. loco horisque consuetisDiss. iur. Basel, 167
De innovatorum seu attentatorum materia
No full textquam ... pro summis in utroque iure honoribus ac privilegiis doctoralibus consequendis publicae censurae ac disquisitioni exponit Iohannes Meyer Lubecensis Saxo ad diem 12. Iunii, anno M DC XXX. ...Druckjahr nach der Datierung im TitelEnthält 224 ThesenDiss. iur. Basel, 163
Disputatio medica de icteritiae flavae theoria & therapia
No full textquam ... pro doctoralibus in medicina consequendis honoribus & privilegiis, Franciscus Ignatius Meyer, Lauffenbergensis Rauracus, publicae ... ventilationi submittit. Ad diem ... Novembr. An. M DC LVIIDatum auf Titelblatt hs. ergänzt: Ad diem 25 Novembr.Enth. 53 ThesenDiss. med. Basel, 165
Address Presenting the First Annual Report
No full textEugene Meyer, President of the International Bank for Reconstruction and Development, presented the First Annual Report by the Executive Directors to the Board of Governors. The report had its genesis over three years during a war in which nearly all mankind was engaged. Meyer details the happenings from 1944 to 1946 and the founding of the organization. The Bank was created to assist in the reconstruction and development of its members by investing capital for productive purposes. Key personnel have been appointed, and working procedures developed. The Bank commenced formal operations on June 25th. Loan requests have been received from two countries. Meyer expects to be lending large sums of money. The goal is to promote peace and prosperity through monetary stabilization and the restoration of international credit, thereby improving the lot of humanity
Common Mode Currents in DC Power Routers
No full textThe grid reinforcement and energy redirection needs have led to the emergence of Back-To-Back Voltage Source Converter (BTB-VSC) based dc power routers. This paper investigates the low frequency Common Mode Currents (CMCs) that arise in the system if the employed BTB-VSCs have an un-isolated ac path connected in parallel to their output ports. Simulation results are presented to show a sensitivity analysis of lower order harmonics in CMC with respect to the operating active and reactive power of the dc router, dc link voltage, link resistance, modulation method and pole capacitance. Experimental results are shared to show existance of lower order CMC in 3-wire ac link operating in parallel with the dc power router and these are mitigated using zero sequence controller
Modeling, Control, and Operation of an M-DAB DC-DC Converter for Interconnection of HVDC Grids
No full textFuture high-voltage direct-current (HVDC) networks based on voltage source converters (VSCs) will have different structures (asymmetric monopolar, bipolar, or symmetric monopolar), voltage levels, control, and protection schemes. Therefore, dc-dc converters are needed to interconnect those VSC-HVDC grids and several technical issues on their control and operational systems must be adequately addressed. A dc-dc converter based on a modular-dual active bridge (M-DAB) converter is suggested to reach a desirable interconnection of the HVDC grids and regulate power flow (PF) between them. A dynamic averaged model is proposed for the M-DAB converter and its stability is analyzed using the Lyapunov function. Moreover, a new local controller based on nonlinear control theory is proposed for the M-DAB. The new M-DAB local controller is integrated with the energy management system (EMS), by updating the PF equations, to create a complete control structure. Considering the CIGRE DCS3 HVDC test system and the studied M-DAB, static, dynamic simulation, and experimental studies are conducted and the dc-dc converter and the performance of the designed controllers and the EMS are examined and validated.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Intelligent Electrical Power Grid
"The German Influence on the Origin of U.S. Federal Financial Rescues"
No full textWhile federal financial rescues have become a common response to crises, federal provision of finance was not one of the original powers of the federal government. One man, Eugene Meyer, is largely responsible for the origin of federal financial rescues, through both the War Finance Corporation and Reconstruction Finance Corporation. Meyer learned laissez faire economics from William Graham Sumner at Yale. However, German economist Adolph Wagner’s state-socialism philosophy heavily influenced Meyer’s thinking, and Meyer developed an interventionist philosophy. Serving in key government positions, Meyer put his beliefs into practice. These channels of influence and the resulting policies are examined.Financial rescues; War Finance Corporation; Reconstruction Finance Corporation.
Restructuring the existing medium voltage distribution grids using DC systems
No full textGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.DC systems, Energy conversion & Storag
Cold cracking in DC-cast high strength aluminum alloy ingots: An intrinsic problem intensified by casting process parameters
No full textFor almost half a century the catastrophic failure of direct chill (DC) cast high strength aluminum alloys has been challenging the production of sound ingots. To overcome this problem, a criterion is required that can assist the researchers in predicting the critical conditions which facilitate the catastrophic failure of the ingots. This could be achieved at first glance by application of computer simulations to assess the level and distribution of residual thermal stresses. However, the simulation results are only able to show the critical locations and conditions where and when high stresses may appear in the ingots. The prediction of critical void/crack size requires simultaneous application of fracture mechanics. In this paper, we present the thermo-mechanical simulation results that indicate the critical crack size distribution in several DC-cast billets cast at various casting conditions. The simulation results were validated upon experimental DC-casting trials and revealed that the existence of voids/cracks with a considerable size is required for cold cracking to occur.Materials Science & EngineeringMechanical, Maritime and Materials Engineerin
A Dynamically Reconfigurable Recursive Switched-Capacitor DC-DC Converter with Adaptive Load Ability Enhancement
No full textMultiple voltage conversion ratio (VCR) recursive switched-capacitor (SC) dc-dc converters, based on several basic 2:1 converters, are widely used for on-chip power supplies due to their flexible VCRs for higher energy efficiency. However, conventional multiple VCR SC converters usually have one or more 2:1 converters unused for some VCRs, which results in lower power density and chip area wastage. This article presents a new recursive dc-dc converter system, which can dynamically reconfigure the connection of all on-chip 2:1 converter cells so that the unused converters in the conventional designs can be reused in this new architecture for increasing the load-driving capacity, power density, and power efficiency. To validate the design, a 4-bit-input 15-ratio system was designed and fabricated in a 180-nm BCD process, which can support a maximum load current of \text{0.71}\,\text{mA} and achieves a peak power efficiency of 93.1% with 105.3\,\mu \text{A/mm} {2} chip power density from a 2-V input power supply. The measurement results show that the load-driving capacity can become 6.826×, 2.236×, and 2.175× larger than the conventional topology when the VCR is 1/2, 1/4, and 3/4, respectively. In addition, the power efficiency under these specific VCRs can also be improved considerably.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic Instrumentatio
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