Hurricane Damage Risk Assessment in the Caribbean: An Analysis using Synthetic Hurricane Events and Nightlight Imagery

Presentation (2014, June 16)

Hybrid Analog-Digital Precoding Design for Satellite Systems

in Proc. 37th International Communications Satellite Systems Conference (ICSSC'19) (2019)

The work investigates the feasibility of massive MIMO in SatCom. Towards this, the necessary channel models, system parameters and scenarios are identified and a basic simulator developed. The work then ... [more ▼]

The work investigates the feasibility of massive MIMO in SatCom. Towards this, the necessary channel models, system parameters and scenarios are identified and a basic simulator developed. The work then considers an efficient implementation of the massive MIMO transmission through the use of hybrid analog/digital precoder. Efficient algorithmic solutions are proposed for the partially connected precoder architecture which enables efficiency in power/ hardware complexity and its performance evaluated. [less ▲]

Hybrid Analog-Digital Transceiver Designs for Cognitive Radio Millimiter Wave Systems

in Hybrid Analog-Digital Transceiver Designs for Cognitive Radio Millimiter Wave Systems (2016)

Recent advances in Milimeter wave (mmWave) band mobile communications may provide solutions to the increasing traffic demand in modern wireless systems. Even though mmWave bands are scarcely occupied, the ... [more ▼]

Recent advances in Milimeter wave (mmWave) band mobile communications may provide solutions to the increasing traffic demand in modern wireless systems. Even though mmWave bands are scarcely occupied, the design of a prospect transceiver should guarantee the efficient coexistence with the incumbent services in these bands. To that end, in this paper, two underlay cognitive transceiver designs are proposed based on a hybrid Analog/Digital transceiver architecture that enables the mmWave spectrum access while controlling the interference to the incumbent users with low hardware complexity and power consumption. The first cognitive solution designs a codebook free cognitive hybrid pre-coder by maximizing the mutual information between its two ends subject to interference, power and hardware constraints related to the analog counterpart. The second solution is codebook based and exhibits less complexity than the first one at the cost of inferior spectral efficiency. A novel codebook free solution for the post-coder at the cognitive receiver part is further proposed, based on a hardware constrained Minimum Mean Square Error criterion. Simulations study the performance of both the proposed hybrid approaches and compare it to the one of a fully digital solution for typical wireless environments. [less ▲]

Hybrid Analog-Digital Transceiver Designs for Multi-User MIMO mmWave Cognitive Radio Systems

in IEEE Transactions on Cognitive Communications and Networking (2020)

Hybrid approaches to historical research: analysing the Anne Frank diaries with digital tools

Presentation (2017, November 28)

This paper argues for a hybrid approach to historical research that combines ’traditional’ with digital hermeneutical approaches in a new practice of doing history. As the digital turn alters and affects ... [more ▼]

This paper argues for a hybrid approach to historical research that combines ’traditional’ with digital hermeneutical approaches in a new practice of doing history. As the digital turn alters and affects all parts of the historical research process, this is a pressing challenge and need for all historians, not just for those engaged in ‘big data’ projects. Indeed, hybridity is, and should be, the new normal. Yet while most historians are accustomed to deploying digital approaches in the information gathering stage of their research, they often refrain from ‘going digital’ in its processing and especially analysis stages. Describing a number of digital tools used in work done on the diaries of Anne frank, the paper critically analyses and demonstrates the added value of incorporating them in all stages of historical research. Digital approaches enhance the methodological repertoire furnished by ‘traditional’ close reading practices. Hybrid approaches thus expand our intellectual horizons and the analytical power we bring to bear upon our sources. [less ▲]

Hybrid Cellular Genetic Algorithm for Global Trajectory Optimization Problem

in International Conference on Metaheuristics and Nature Inspired Computing (2010)

A Hybrid Cognitive Transceiver Architecture: Sensing-Throughput Tradeoff

in Proceedings of 9th International Conference on Cognitive Radio Oriented Wireless Networks (2014, June)

Spectrum Sensing (SS) and underlay have been considered as two important techniques for enabling the spectral coexistence of the licensed and unlicensed wireless communication systems. The SS only ... [more ▼]

Spectrum Sensing (SS) and underlay have been considered as two important techniques for enabling the spectral coexistence of the licensed and unlicensed wireless communication systems. The SS only approach ignores the interference tolerance capability of the Primary Users (PUs) while assuming the bursty PU traffic whereas the possibility of having secondary transmission with full power is neglected in an underlay based approach. To address this, it’s crucial to investigate suitable hybrid spectrum awareness and transmission strategies which can overcome the aforementioned drawbacks and achieve higher secondary throughput while protecting the PUs. In this context, we propose a hybrid cognitive transceiver which combines the SS approach with the power control based underlay approach. Furthermore, we evaluate the performance of the proposed hybrid approach considering both periodic sensing and simultaneous sensing/transmission schemes. Moreover, sensing-throughput tradeoff for the proposed hybrid approach is investigated and the performance is compared with the conventional SS only approaches in terms of the achievable throughput. It is shown that the proposed scheme can achieve a significant improvement in the secondary throughput over the conventional approaches while respecting the interference constraints of the PUs. [less ▲]

Hybrid Erythrocyte Liposomes: Functionalized Red Blood Cell Membranes for Molecule Encapsulation

in Advanced Biosystems (2020), 4(3), 1900185-11

The modification of erythrocyte membrane properties provides a new tool towards improved drug delivery and biomedical applications. The fabrication of hybrid erythrocyte liposomes is presented by doping ... [more ▼]

The modification of erythrocyte membrane properties provides a new tool towards improved drug delivery and biomedical applications. The fabrication of hybrid erythrocyte liposomes is presented by doping red blood cell membranes with synthetic lipid molecules of different classes (PC, PS, PG) and different degrees of saturation (14:0, 16:0-18:1). The respective solubility limits are determined, and material properties of the hybrid liposomes are studied by a combination of X-ray diffraction, epi-fluorescent microscopy, dynamic light scattering (DLS), Zeta potential, UV-vis spectroscopy, and Molecular Dynamics (MD) simulations. Membrane thickness and lipid orientation can be tuned through the addition of phosphatidylcholine lipids. The hybrid membranes can be fluorescently labelled by incorporating Texas-red DHPE, and their charge modified by incorporating phosphatidylserine and phosphatidylglycerol. By using fluorescein labeled dextran as an example, it is demonstrated that small molecules can be encapsulated into these hybrid liposomes. [less ▲]

"Hybrid Histories". Versuch einer kritischen Standortbestimmung der Mediengeschichte

in Annali dell'Istituto Storico Italo-Germanico in Trento = Jahrbuch des Italienisch-Deutschen Historischen Instituts in Trient (2018), 44(1), 117-132

This article aims at offering a historiographical sketch of the emergence and development of media history as a sub-discipline of historical research. By retracing important disciplinary traditions and by ... [more ▼]

This article aims at offering a historiographical sketch of the emergence and development of media history as a sub-discipline of historical research. By retracing important disciplinary traditions and by reflecting on the impact that various "turns" in humanities had on media historical scholarship, the author identifies central concepts, methodological approaches, and thematic focal points that characterize the field. Finally, new challenges of doing media history in the digital age - such as transmedia storytelling and media convergence are discussed. [less ▲]

Hybrid Histories: Historicizing the Home Movie Dispositif

in Aasman, Susan; Fickers, Andreas; Wachelder, Joseph (Eds.) Materializing Memories: Dispositifs, Generations, Amateurs (2018)

In media historiography, there have generally been two approaches to historicize past media technologies and their practices. Whereas media historians generally focus on historical changes by maintaining ... [more ▼]

In media historiography, there have generally been two approaches to historicize past media technologies and their practices. Whereas media historians generally focus on historical changes by maintaining a diachronic perspective on how media technologies and practices develop over time, media archaeologists commonly adopt a synchronic perspective in (re)constructing parallel or alternative histories. This chapter aims to explore and propose a third approach to media historiography, which departs from the notion of “hybridity”: the intermingling and co-existence of old and new media technologies, user practices, and discourses as evolving in an ongoing process. Building on some of the empirical and conceptual results of my research on the home movie as a twentieth-century family memory practice, I develop the argument that a “hybrid media historiography” enables one to grasp the complex interrelations and dynamics between media technologies, user practices, and discourses in more precise and comprehensive ways by maintaining both a diachronic and synchronic perspective in studying media transitions. By looking specifically at how the transition from amateur film to home video gradually constituted a new home movie dispositif in the 1970s and 1980s, I will underline the heuristic potential of hybridity as analytical lens in media historical research. [less ▲]