A5062218401- Planetary Science and Exploration
- Astro and Planetary Science
- Solar and Space Plasma Dynamics
- Acoustic Wave Phenomena Research
- Geomagnetism and Paleomagnetism Studies
- Ionosphere and magnetosphere dynamics
- Metamaterials and Metasurfaces Applications
- Access Control and Trust
- Space Exploration and Technology
- Space exploration and regulation
- Music Technology and Sound Studies
- Logic, Reasoning, and Knowledge
- Manufacturing Process and Optimization
- Bayesian Modeling and Causal Inference
- Space Science and Extraterrestrial Life
- Parallel Computing and Optimization Techniques
- BIM and Construction Integration
- Vibration Control and Rheological Fluids
- Geophysics and Gravity Measurements
- Advanced Adaptive Filtering Techniques
- Design Education and Practice
- Advanced Antenna and Metasurface Technologies
- Cloud Data Security Solutions
- Cryptography and Data Security
- Interconnection Networks and Systems
University of Sheffield
2014-2024
Microsoft (United States)
2016
Microsoft Research (United Kingdom)
2012-2015
The University of Queensland
2005-2006
Defence Science and Technology Group
2006
Australian Defence Force Academy
2006
Systems Technology (United States)
2005
Technology Centre Prague
2005
Datacenter workloads demand high computational capabilities, flexibility, power efficiency, and low cost. It is challenging to improve all of these factors simultaneously. To advance datacenter capabilities beyond what commodity server designs can provide, we have designed built a composable, reconfigurablefabric accelerate portions large-scale software services. Each instantiation the fabric consists 6x8 2-D torus high-end Stratix V FPGAs embedded into half-rack 48 machines. One FPGA placed...
Datacenter workloads demand high computational capabilities, flexibility, power efficiency, and low cost. It is challenging to improve all of these factors simultaneously. To advance datacenter capabilities beyond what commodity server designs can provide, we have designed built a composable, reconfigurable fabric accelerate portions large-scale software services. Each instantiation the consists 6×8 2-D torus high-end Stratix V FPGAs embedded into half-rack 48 machines. One FPGA placed each...
To advance datacenter capabilities beyond what commodity server designs can provide, the authors designed and built a composable, reconfigurable fabric to accelerate large-scale software services. Each instantiation of consists 6 x 8 2D torus high-end field-programmable gate arrays (FPGAs) embedded into half-rack 48 servers. The deployed in bed 1,632 servers FPGAs production successfully used it ranking portion Bing Web search engine by nearly factor two.
Collisionless shocks are present in the vicinity of many astrophysical objects such as supernova remnants, space jets, stars and planets immersed supersonic flow stellar winds. Understanding shock structure is crucial for understanding processes redistribution upstream energy into accelerated particles formation downstream thermalized distribution. We report first observations (by Venus Express) subcritical that do not fit well‐established classical classification. It shown its abnormal due...
Dempster’s rule is traditionally interpreted as an operator for fusing belief functions. While there are different types of fusion, has been considerable confusion regarding the exact type operation that performs. Many alternative operators fusion have proposed, where some based on same fundamental principle rule, and others a totally basis, such cumulative averaging operators. In this article, we analyze from statistical frequentist perspective compare it with fusion. We prove, illustrate...
Abstract. In situ measurements of the magnetic field are vital to study many fundamental problems in planetary research. Therefore magnetometer experiment is a key element payload Venus Express. addition interaction solar wind with Venus, these crucial for atmospheric escape and detection lightning. However, methodology had be different traditional approach, because Express not magnetically clean spacecraft. A technique based on two-point simultaneous systems identification software used...
Datacenter workloads demand high computational capabilities, flexibility, power efficiency, and low cost. It is challenging to improve all of these factors simultaneously. To advance datacenter capabilities beyond what commodity server designs can provide, we designed built a composable, reconfigurable hardware fabric based on field programmable gate arrays (FPGA). Each in the contains one FPGA, FPGAs within 48-server rack are interconnected over low-latency, high-bandwidth network. We...
Magnetometer data from two Venus years of the Express mission in orbit are investigated for occurrence ion cyclotron waves. Proton waves were recently detected upstream region by spacecraft, indicating pickup planetary protons Venus's exosphere solar wind and loss hydrogen to interplanetary space. A study representative cases illustrates waveform, spectrum, duration, higher‐order resonances transverse with left‐hand circular polarization propagation nearly along magnetic field; their...
The interaction of the solar wind with Venus has a significant influence on evolution its atmosphere. Due to lack an intrinsic planetary magnetic field, there is direct contact between fast flowing and Venusian ionosphere. This leads number different types atmospheric escape process. Using Express observations, we show that such formation global vortices downstream bow shock. These accelerate heavy ionospheric ions as oxygen, leading their escape. We argue these are result Kelvin‐Helmholtz...
Abstract Collisionless shocks are ubiquitous throughout the known universe. They mainly convert energy of directed ion flow into heating. Upon crossing shock front, distribution becomes nongyrotropic. Relaxation to gyrotropy then occurs via kinematic collisionless gyrophase mixing and interaction with waves. The theory relaxation predicts that downstream pressure each species varies quasi‐periodically distance from transition layer amplitude variations gradually decrease. oscillations due...
All conventional acoustic/elastic media are restricted to possess positive constants for their constitutive parameters (density and modulus). Metamaterials provide an approach through which this restriction can be broken. By making these negative and/or tuneable a broader range of properties becomes possible. This paper describes the first experimental implementation metamaterial in material both simultaneously finite frequency band magnitude independently on demand. The design is active...
Abstract. Low frequency waves in the foot of a supercritical quasi-perpendicular shock front have been observed since very early situ observations terrestrial bow (Guha et al., 1972). The great attention that has devoted to these type first is explained by key role attributed them processes energy redistribution various theoretical models. In some models, play intermediator between ions and electrons. It assumed they are generated plasma instability exist due counter-streaming flows incident...