91,784 research outputs found
Differential cross-section measurements of boosted top quarks at TeV with the ATLAS detector
Differential cross-section measurements of highly boosted top quarks are
presented. The dataset used has an integrated luminosity of fb,
recorded at a centre-of-mass energy of TeV with the ATLAS
detector at the CERN Large Hadron Collider in 2015. Events are selected in the
lepton + jets channel, containing one isolated lepton and a large radius jet
that is identified as originating from a top quark using substructure tagging
techniques. The measured transverse momentum and absolute rapidity
distributions are unfolded to remove detector effects and compared to a range
of Monte Carlo simulations. The transverse momentum distribution shows that all
Monte Carlo generators used predict a harder spectrum than observed in data,
while the rapidity distribution agrees well between MC and data.Comment: 4 pages, 4 figures, Top201
Quadrotor control for persistent surveillance of dynamic environments
Thesis (M.S.)--Boston UniversityThe last decade has witnessed many advances in the field of small scale unmanned aerial vehicles (UAVs). In particular, the quadrotor has attracted significant attention. Due to its ability to perform vertical takeoff and landing, and to operate in cluttered spaces, the quadrotor is utilized in numerous practical applications, such as reconnaissance and information gathering in unsafe or otherwise unreachable environments.
This work considers the application of aerial surveillance over a city-like environment. The thesis presents a framework for automatic deployment of quadrotors to monitor and react to dynamically changing events. The framework has a hierarchical structure. At the top level, the UAVs perform complex behaviors that satisfy high- level mission specifications. At the bottom level, low-level controllers drive actuators on vehicles to perform the desired maneuvers.
In parallel with the development of controllers, this work covers the implementation of the system into an experimental testbed. The testbed emulates a city using physical objects to represent static features and projectors to display dynamic events occurring on the ground as seen by an aerial vehicle. The experimental platform features a motion capture system that provides position data for UAVs and physical features of the environment, allowing for precise, closed-loop control of the vehicles. Experimental runs in the testbed are used to validate the effectiveness of the developed control strategies
Discomfort food : how a market for synthetic foods is being assembled : a thesis presented in partial fulfilment of the requirements for the degree of Master of Arts in Geography at Massey University, Palmerston North, New Zealand
Images redacted from thesis due to copyright reasonsThis research follows the discursive productions of human actors in an assemblage that is creating a
market for Synthetic Foods. This assemblage, which includes human actants referred to here as The
Movement, is represented in two major empirical themes. First it is demonstrated how The
Movement is attempting to immaterially disassemble conventional Animal Agriculture, by
discursively cleaving it from the notion that it produces natural foods. Second it is shown how The
Movement is constructing a new market for natural foods, where animal products are made without
animals. The non-human actors of this assemblage are said to be enrolled but this belies the multiple
levels of negotiation that are yet to take place. Through collecting and analysing the media
productions of The Movement, the discursive performances and relational spaces that constitute
this assemblage can be traced. Through tracing these material and immaterial practices the main
argument developed here is that a market for Synthetic Foods is being culturally assembled in a
series of discursive productions. The Movements discursive texts show an attempt to both, requalify
what natural foods are said to be and then to simultaneously create a spectacle that fixes the
identities of actors that supposedly produce them. This can be understood using a Cultural Economy
approach which extends the argument by demonstrating that this market assemblage recombines
nature with its binary other, culture, in a new way, to form a differently constituted world
Manchester Snow Emergency Analysis: Who is Being Towed from Where and Why
This Capstone paper analyzes the City of Manchester, New Hampshireâs policy and community impacts when their Towing Snow Emergency procedures are implemented. While the public expects their city streets and sidewalks to be cleared of snow during and following snow storms, the process to do so in the city streets requires vehicles to be re-located from parking on the street. This process requires privately owned vehicles to be ticketed or towed during the worst of weather during the winter. Although the city administration has attempted to avoid having to tow vehicles as the report shows, there is still a historical and current number of vehicles towed during each declared Snow Emergency which is comparatively high to other New Hampshire cities and towns. This Capstone project discovers âwhoâ is being towed from âwhereâ and the various reasons âwhyâ they do not know about declared Snow Emergencies. The paper makes a ârecommendationâ based on four âconclusionsâ given at the end of the paper from the study. The paperâs recommendation is that the Mayor and Board of Aldermen appoint a special study committee to develop mitigating procedures and policies to reduce the number of vehicles towed and the subsequent negative impact on the community
Total Quality Facilities Management and Innovation: A Synergistic Approach
The ideas of quality and performance management and innovation in facilities management service provision are not new. Total Quality Management (TQM) is widely recognised throughout the world as a concept capable of providing competitive advantage. Innovation has also received considerable attention as having a crucial role in securing sustainable competitive advantage. However, there has been little consideration of the potential for integration of TQM practices with innovation principles in determining facilities management performance. TQM and innovation appear to corroborate each other and are becoming increasingly important in facilities management. This study takes a theoretical approach to critically review the relationship between TQM and innovation and to determine the relationship between TQM and Innovation in regard to facilities service provision. The theoretical implication is that FM service providers may adopt a synergistic approach to TQM and innovation, leading to sustained competitive advantage in terms of better positioning themselves within the saturated FM marketplace
1991 NCCD Prison Population Forecast: The Impact of Declining Drug Arrests (FOCUS)
According to the National Council and Crime and Delinquency (NCCD), prison populations will increase by 35 percent over the next five years under the current criminal justice policies. This rate of growth is significantly lower than NCCD's 1989 estimates of a 60 percent increase over five years. The principal reason for the lower growth rate is a 20 percent reduction in drug arrests, which in turn is reducing projected jail and prison admissions. The declining number of drug arrests are related to the fiscal crisis of state and local governments, drug asset and seizure laws, and lower drug use. However, prison populations will continue to grow despite reductions in admissions due to the passage of mandatory minimum sentencing statutes and lengthier prison terms for certain crimes. Assuming that the 16 states researched are representative of trends that are on-going in other states and the Federal Prison System, the nation's prison population will reach 1 million inmates by 1994
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