13,951 research outputs found
ShenZhen transportation system (SZTS): a novel big data benchmark suite
Data analytics is at the core of the supply chain for both products and services in modern economies and societies. Big data workloads, however, are placing unprecedented demands on computing technologies, calling for a deep understanding and characterization of these emerging workloads. In this paper, we propose ShenZhen Transportation System (SZTS), a novel big data Hadoop benchmark suite comprised of real-life transportation analysis applications with real-life input data sets from Shenzhen in China. SZTS uniquely focuses on a specific and real-life application domain whereas other existing Hadoop benchmark suites, such as HiBench and CloudRank-D, consist of generic algorithms with synthetic inputs. We perform a cross-layer workload characterization at the microarchitecture level, the operating system (OS) level, and the job level, revealing unique characteristics of SZTS compared to existing Hadoop benchmarks as well as general-purpose multi-core PARSEC benchmarks. We also study the sensitivity of workload behavior with respect to input data size, and we propose a methodology for identifying representative input data sets
Seafloor characterization using airborne hyperspectral co-registration procedures independent from attitude and positioning sensors
The advance of remote-sensing technology and data-storage capabilities has progressed in the last decade to commercial multi-sensor data collection. There is a constant need to characterize, quantify and monitor the coastal areas for habitat research and coastal management. In this paper, we present work on seafloor characterization that uses hyperspectral imagery (HSI). The HSI data allows the operator to extend seafloor characterization from multibeam backscatter towards land and thus creates a seamless ocean-to-land characterization of the littoral zone
ISER 2012 Working Paper No. 1
Large resource development projects take years to plan. During that planning time, the public
frequently debates the potential benefits and risks of a project, but with incomplete information.
In these debates, some people might assert that a project would have great benefits, while others
might assert that it would certainly harm the environment. At the same time, the developer will
be assessing different designs, before finally submitting one to the government permitting
agencies for evaluation and public scrutiny.
For large mines in Alaska, the government permitting process takes years, and often includes an
ecological risk assessment. This assessment is a data-intensive, scientific evaluation of the
project’s potential ecological risks, based on the specific details of the project.
Recently, some organizations have tried to bring scientific rigor to the pre-design public
discussions, especially for mining projects, through a pre-design risk ecological risk assessment.
This is a scientific assessment of the environmental risks a project might pose, before the details
of project design, risk-prevention, and risk-mitigation measures are known.
It is important to know whether pre-design risk assessment is a viable method for drawing
conclusions about risks of projects. If valid risk predictions can be made at that stage, then
people or governments would not have to wait for either a design or for the detailed evaluation
that is done during the permitting process. Such an approach could be used to short cut
permitting. It could affect project financing; it could affect the schedule, priority, or even the
resources that governments put toward evaluating a project. But perhaps most important: in an
age where public perceptions are an important influence on a project’s viability and government
permitting decisions, a realistic risk assessment can be used to focus public attention on the facts.
But if the methodology is flawed and results in poor quality information and unsupportable
conclusions, then a pre-design risk assessment could unjustifiably either inflame or calm the
public, depending on what it predicts.Executive Summary / Section 1. Introduction / Section 2. Overview of Ecological Risk / Section 3. Ecological Risk Assessment Methodology / Section 4. Examples of Post-Design Ecological Risk Assessments / Section 5. Pre-Design Ecological Risk Assessment: Risks of Large Scale Mining in the Bristol Bay Watershed / Section 6. Conclusion / Bibliograph
A Proposal for a Three Detector Short-Baseline Neutrino Oscillation Program in the Fermilab Booster Neutrino Beam
A Short-Baseline Neutrino (SBN) physics program of three LAr-TPC detectors
located along the Booster Neutrino Beam (BNB) at Fermilab is presented. This
new SBN Program will deliver a rich and compelling physics opportunity,
including the ability to resolve a class of experimental anomalies in neutrino
physics and to perform the most sensitive search to date for sterile neutrinos
at the eV mass-scale through both appearance and disappearance oscillation
channels. Using data sets of 6.6e20 protons on target (P.O.T.) in the LAr1-ND
and ICARUS T600 detectors plus 13.2e20 P.O.T. in the MicroBooNE detector, we
estimate that a search for muon neutrino to electron neutrino appearance can be
performed with ~5 sigma sensitivity for the LSND allowed (99% C.L.) parameter
region. In this proposal for the SBN Program, we describe the physics analysis,
the conceptual design of the LAr1-ND detector, the design and refurbishment of
the T600 detector, the necessary infrastructure required to execute the
program, and a possible reconfiguration of the BNB target and horn system to
improve its performance for oscillation searches.Comment: 209 pages, 129 figure
Underwater Central California: A Guide to Saving Your Ocean Heritage
Describes the state of the wildlife and habitats inside the three national marine sanctuaries that stretch along the coast of central California, and identifies key threats to the future of California's coast
Generic typology for irrigation systems operation
Irrigation management / Irrigation systems / Water use efficiency / Canals / Operations / Typology / Water delivery / Water distribution / Water conveyance / Water storage / Irrigation effects / Environmental effects / Gravity flow / Hydraulics / Constraints / Water supply / Networks / Case studies / Sri Lanka
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