Distributed Transformers for Broadband Monolithic Millimeter-Wave Integrated Power Amplifiers

Die vorliegende Arbeit beschreibt Methoden und Techniken zur Optimierung und Realisierung von verteilten magnetischen Transformatoren für deren Einsatz in Anpassnetzwerken von Monolithischen Integrierten Millimeterwellenschaltungen (engl. MMICs). Es werden Strategien für die Effizienz- und Bandbreitenoptimierung verteilter Transformatoren vorgestellt. Diese werden mit Hilfe einer optimierten Transformatorgeometrie verifiziert und anhand von zwei MMIC Leistungsverstärkern demonstriert

Energy-Efficient-Homes : Designing energy-efficient architecture in an urban context

Zugl. erschienen in: Energy Efficient Housing for Iran : Pilot Buildings in Hashtgerd New Town. - Berlin: Universitätsverlag der TU Berlin, 2013 (Young Cities Research Paper Series ; 4) http://nbn-resolving.de/urn:nbn:de:kobv:83-opus-39369 Zugleich gedruckt veröffentlicht im Universitätsverlag der TU Berlin unter der ISBN 978-3-7983-2565-4.The concept for the Energy- Efficient- Homes is part of a holistic approach to develop urban structures with energy-saving features, high quality, low carbon emissions and affordable costs for middle and lower income classes. The process of developing this concept includes a design for energy-efficient housing in an Iranian new town project with potential for mitigation in the region and climate adaptation. The method of developing a spatial concept according to the energy-relevant aspects of urban and architectural morphology and integrating it into the socio-cultural context of the “Shahre Javan Community”, the pilot settlement in Hashtgerd New Town, is designed to provide an economic strategy for a practical basic energy standard that has been adapted to the region. The courtyard housing scheme of the Energy- Efficient- Homes shows a new development derived from the vernacular approach of spatial hierarchy considering the major morphological aspects of orientation and compactness. With the use of new technologies for energy efficiency, this basic standard of spatial organisation and design can also be upgraded to meet higher standards. The chosen research methodology for the Energy-Efficient-Homes is performed for a residential pilot project in the “Shahre Javan Community”. To ensure the appropriateness to the pilot project, the methods of research are integrated in a planning process. The method suitable for combining scientific and planning results is the research-by-design process. In a systematic work process, the findings of a general approach and specific design allow for the evaluation and definition of further steps. By applying this scenario-specific methodology for architectural and urban design supposition, that have been obtained from a general approach, to real planning situations, the assessment can be performed on different scales. Finally, the results gathered in the design process are used to revise the formulation of the initial approach. The findings of the design and research process for the Energy-Efficient-Homes are transferred to a final design proposal for an urban unit in the pilot area. By transforming the design and adaptation measures from the typological approach into a specific design scenario, the challenges for the practical application of such a general approach can be weighted and evaluated. Furthermore, the realistic scenario serves as a basis for cost estimations, energy simulations and constructional detailing. Architectural models and drawings are used to define a standard for materials and energy objectives. The definition of adaptive design measures out of the research and planning process and the identification of urban, architectural and technical elements for developing the Energy-Efficient-Homes led to a distinction between a Basic Principle and possible Upgrades. This categorisation helps to define different standards as well as a scientific basis for the planning process of energy-efficient housing in the region. The Basic Principle is the design strategy for energy-efficient architecture and urban design from a spatial approach without any additional technical demands. It contains all planning and design measures to increase energy efficiency through the spatial configuration, such as building orientation and compactness, site suitability and cultural context. It can be seen as a low-cost approach and defines a minimum standard for energy efficiency in the Middle East. The upgrading measures include possibilities to raise the standard of the basic principle. Supplementary technologies can be integrated into the spatial approach. Possible Upgrades include simple mechanical elements for light and energy guidance, such as sun-shutters, furthermore the use of the ground temperature by means of earth tubes and a concept of heat exchangers, and finally the application of higher technological materials, such as photovoltaic fabrics to generate supplementary energy. The measures are characterized by a planning dimension as well as a technological and economic dimension. The choice of upgrading measure is dependent on the economic and technological context. The upgrade defines the standard for maximum energy efficiency in the region

Communication, trust and leadership in co-managing biodiversity:A network analysis to understand social drivers shaping a common narrative

Environmental co-management has been advocated and applied in diverse contexts as an integrative and inclusive approach to make biodiversity conservation more effective and contextual. Co-management however requires the actors involved to overcome tacit boundaries and reconcile different viewpoints to reach a shared understanding on the environmental problem and envisioned solution(s). We depart from the assumption that a common narrative can serve as a base for a shared understanding and analyze what types of actor relations in co-management influence the emergence of a common narrative. Empirical data is collected using a mixed-method case study design. We apply the idea of narrative congruence, which relates to the similarity of narrations that actors tell, to investigate the effects of the types of relationships between two actors as well as specific leadership roles using an Exponential Random Graph Model. We find that frequent interaction between two actors and a trusted leader with many reciprocal trust ties to be important drivers to support the emergence of narrative congruence ties. Connecting leaders, i.e. actors in brokering positions, show a statistically significant negative correlation with narrative congruence ties. The results suggest that a common narrative tends to emerge in sub-groups around a highly trusted leader, in which actors talk frequently to each other. A brokering leader, however, seems to face strong difficulties of forming narrative congruence ties with others, although such brokers may play central roles in the co-design of common narratives to form the basis for motivating collective action in co-management. Lastly, we discuss the importance of common narratives and how leaders can better succeed in co-designing these in environmental co-management approaches.</p

Feeling Political

Historicizing both emotions and politics, this open access book argues that the historical work of emotion is most clearly understood in terms of the dynamics of institutionalization. This is shown in twelve case studies that focus on decisive moments in European and US history from 1800 until today. Each case study clarifies how emotions were central to people’s political engagement and its effects. The sources range from parliamentary buildings and social movements, to images and speeches of presidents, from fascist cemeteries to the International Criminal Court. Both the timeframe and the geographical focus have been chosen to highlight the increasingly participatory character of nineteenth- and twentieth-century politics, which is inconceivable without the work of emotions

Krüppel-like factor 15 regulates BMPER in endothelial cells

Bone morphogenetic proteins (BMPs) are involved in embryonic and adult blood vessel formation in health and disease. Previous studies have shown that BMP endothelial cell precursor-derived regulator (BMPER) plays an important role in endothelial cell function and blood vessel formation. BMPER is a key regulator of BMP4 activity and a prerequisite for BMP pathway activation by BMP4 in endothelial cells. Here, we characterize the BMPER promoter and elucidate mechanisms of BMPER regulation

The Shahre Javan Community Detailed Plan : Planning for a Climate Responsive and Sustainable Iranian Urban Quarter

Zugleich gedruckt veröffentlicht im Universitätsverlag der TU Berlin unter der ISBN 978-3-7983-2451-0.This report presents the major accomplishments of the ‘Shahre Javan Community’ pilot project as the main pilot project of the German-Iranian Young Cities research project,. ‘Shahre Javan’ is Farsi and stands for ‘Young City’. The pilot project uses an integrated planning and research process to explore aspects of energy and resource efficiency, climate and environmentally conscious solutions for urban form, architecture, landscape planning, transportation planning, water and energy management, and environmental assessment. It is about the upgraded Iranian detailed plan (‘Tarh-e Tafsili’) for a nearly 45 ha large pilot project area in the southern part of the Hashtgerd New Town, Iran. It includes innovations derived during the strategically integrative urban development and research process, in an effort to reach more climate responsive and more sustainable urban development. Thus, several of the presented solutions go above and beyond the standard content of an Iranian detailed plan. Hence, this publication does not present the or an approved formal Iranian detailed plan. Rather, it combines a reflection of research background, approach, and process with a kind of a hybrid detailed plan report which includes common Iranian detailed plan contents and new and innovative elements as well as research findings going beyond the detailed plan scale and content. Printed Version published by Universitätsverlag der TU Berlin (www.univerlag.tu-berlin.de), ISBN 978-3-7983-2451-

Terrestrial Very-Long-Baseline Atom Interferometry:Workshop Summary

This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world to discuss the exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter and gravitational waves. The primary objective of the workshop was to lay the groundwork for an international TVLBAI proto-collaboration. This collaboration aims to unite researchers from different institutions to strategize and secure funding for terrestrial large-scale AI projects. The ultimate goal is to create a roadmap detailing the design and technology choices for one or more km-scale detectors, which will be operational in the mid-2030s. The key sections of this report present the physics case and technical challenges, together with a comprehensive overview of the discussions at the workshop together with the main conclusions

Measurement of the D±\mathrm{D^\pm} Meson Cross Section in DIS with the H1 Detector at HERA

The inclusive production of D mesons in deep inelastic scattering at p s = 318 GeV at HERA is studied using data taken with the H1 detector during the high energy measurement period in the years 2006 and 2007 corresponding to an integrated luminosity of 202 : 6 pb 1 . The visible phase space is defined by 5 < Q 2 < 100 GeV 2 , 0 : 05 < y < 0 : 6, 1 : 5 < p T ( D ) and 1 : 5 < h ( D ) < 1 : 5, where Q 2 is the photon virtuality, y is the inelasticity and p T ( D ) and h ( D ) are the transverse momentum and rapidity of the D meson. Charm production events are identified by the reconstruction of the D ! K p p decay channel. The sample is enhanced by the application of a multi-variate analysis technique using a multilayer perceptron. The input variables of the classifier are based on the specific energy loss of the kaon decay particle candidate and the reconstructed decay length of the D meson. The single and double differential cross sections are compared to leading and next-to-leading order QCD predictions

Distributed Transformers for Broadband Monolithic Millimeter-Wave Integrated Power Amplifiers

This work presents methods and techniques to optimize and implement distributed magnetic transformers for their application in matching networks of Monolithic Millimeter-wave Integrated Circuits (MMICs). It describes strategies for the efficiency and bandwidth optimization of the transformers and demonstrates their potential based on an optimized transformer geometry as well as two MMIC power amplifiers

A low-noise and scalable FPGA-based analog signal generator for quantum gas experiments

Achieving high fidelity for the measurement and control of quantum experiments imposes strict requirements on the precision and stability of surrounding electronics. Controlling electronics from a central device is more challenging when they are distributed in a laboratory and require analog signals where effects like ground loops and radiative cross-talk can limit their performance. Here, we present our design to address these challenges with a flexible and scalable analog signal generator. Our design is based on a field-programmable gate array (FPGA) development board, a custom PCB hosting a digital-to-analog converter (DAC) with 20 bit precision at 1 MSPS, and a custom breakout board. The FPGA development board accepts data from a master PC via TCP/IP where a user programs the waveform and sampling rate of each output channel and writes the data to on-board RAM. At runtime, the direct memory access (DMA) and Serial Peripheral Interface (SPI) modules inside the FPGA stream data to the custom DAC board via an Ethernet cable carrying the samples as differential signals along with the supply voltage. We designed the DAC board to be resistant to digital and analog noise by separating ground planes to prevent ground loops and by using high-precision and low-noise power supplies and voltage reference circuits. External trigger and clock inputs can be used to synchronize the DACs and multiple FPGAs. The time resolution and precision of our solution is optimized for experiments on quantum gases though it is flexible and can be adapted for many more applications