12,141 research outputs found
Banded Contracts, Mediating Institutions, and Corporate Governance: A Naturalist Analysis of Contractual Theories of the Firm
Fort and Noone relate business ethics to notions of transcendence found in nature and anthropology. They address the notion of contracts within corporate legal theory because contracts are used as a model both by those who advocate minimalist, agency business duties and by others who propound a broad business ethic
Cadmium opens GluK2 kainate receptors with cysteine substitutions at the M3 helix bundle crossing
Below Horizon Aircraft Detection Using Deep Learning for Vision-Based Sense and Avoid
Commercial operation of unmanned aerial vehicles (UAVs) would benefit from an
onboard ability to sense and avoid (SAA) potential mid-air collision threats.
In this paper we present a new approach for detection of aircraft below the
horizon. We address some of the challenges faced by existing vision-based SAA
methods such as detecting stationary aircraft (that have no relative motion to
the background), rejecting moving ground vehicles, and simultaneous detection
of multiple aircraft. We propose a multi-stage, vision-based aircraft detection
system which utilises deep learning to produce candidate aircraft that we track
over time. We evaluate the performance of our proposed system on real flight
data where we demonstrate detection ranges comparable to the state of the art
with the additional capability of detecting stationary aircraft, rejecting
moving ground vehicles, and tracking multiple aircraft
Pre-Construction, Construction, and Post Construction Final Monitoring Report for Greenland Meadows: July 2007- November 2013
The Performance Analysis of Two Relatively Small Capacity Urban Retrofit Stormwater Controls
This paper details field investigations that were conducted on the performance of small capacity urban retrofit stormwater control measures. The objective of the two year study (2013β2015) was to provide performance data on stormwater retrofits that could not be fully sized according to conventional standards due to space constraints. In many states performance credits are not granted to stormwater management controls that are not designed to manage regionally derived water quality volumes. In retrofit applications there may exist numerous limitations to conventionally sized systems such as limited rights of way, setback distances or existing utilities. The larger scale objective of green infrastructure implementation is to improve receiving water quality and therefore even undersized systems, to some extent, meet this objective.
This study introduces data on two systems: an innovative bioretention design with a water treatment residual amended filter media and an internal storage reservoir; and an undersized linear subsurface gravel wetland sized to optimize both phosphorus and nitrogen removal. The systems were retrofitted into existing developed areas and were sized at less than the water quality volume due to limited space at each location. The bioretention system (IBSC) was constructed in a commercial area in the town of Durham, NH in summer 2011 and the subsurface gravel wetland system (SGWSC) was constructed in a narrow drainage right of way in a residential neighbourhood of Durham, NH in the fall of 2013.
Sediment and metal removals for both undersized systems were high with median removal efficiencies in the SGW of 75% for both total suspended solids (TSS) and total zinc (TZn). The Durham IBSC recorded median removal efficiency (RE) of 86% for TSS and TZn. Total phosphorus (TP) REs were higher than conventional bioretention systems with the subsurface gravel wetland system achieving a median RE of 53% and the Durham IBSC achieving a median RE of 40% for TP. Both systems reduced total nitrogen (TN) by approximately 20% (23% for SGWSC and 21% for Durham IBSC) with median effluent concentrations of 1.4 mg/L. This project was funded by the U.S. Environmental Protection Agency Region 1, Regional Applied Research Effort (RARE) Program. Additional information can be found in the full project report Performance Analysis of Two Relatively Small Capacity Urban Retrofit Stormwater Controls (Houle et al. 2015)
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