607 research outputs found
The Logbook, A Publication of the Wayne E. Meyer Institute of Systems Engineering / May 2004
www.nps.navy.mil/meyerinstitute Email:[email protected] Phone:(831) 656-7847 Fax:(831) 656-2336 Naval Postgraduate School, 777 Dyer Rd., Mail Code 97, Monterey, CAArticles include: Turnover Time, Joint Executive Systems Engineering and Management Program (SEM-PD21), and Integrated Campus Projects and the Meyer Institute.Naval Postgraduate School, Monterey, C
The Logbook, A Publication of the Wayne E. Meyer Institute of Systems Engineering / December 2003
www.nps.navy.mil/meyerinstitute Email:[email protected] Phone:(831) 656-7847 Fax:(831) 656-2336 Naval Postgraduate School, 777 Dyer Rd., Mail Code 97, Monterey, CAArticles including: Systems Analysis Certificate Program Takes Off! etc.Naval Postgraduate School, Monterey, C
Moneyball\u27s Impact on Business and Sports
The article presents a transcript of the \u27Moneyball\u27s\u27 Impact on Business and Sports panel discussion which was held as part of the annual Villanova Sports and Entertainment Law Journal Symposium in Villanova, Pennsylvania in February 2012. The panel, which featured former Pennsylvania Governor Edward G. Rendell and Oakland Athletics baseball team General Manager Billy Beane, discussed the impact of Michael Lewis\u27 book Moneyball: The Art of Winning an Unfair Game on the game of baseball
The Orbit of the Companion to HD 100453A: Binary-Driven Spiral Arms in a Protoplanetary Disk
HD 100453AB is a 10+/-2 Myr old binary whose protoplanetary disk was recently
revealed to host a global two-armed spiral structure. Given the relatively
small projected separation of the binary (1.05", or ~108 au), gravitational
perturbations by the binary seemed to be a likely driving force behind the
formation of the spiral arms. However, the orbit of these stars remained poorly
understood, which prevented a proper treatment of the dynamical influence of
the companion on the disk. We observed HD 100453AB between 2015-2017 utilizing
extreme adaptive optics systems on the Very Large Telescope and Magellan Clay
Telescope. We combined the astrometry from these observations with published
data to constrain the parameters of the binary's orbit to a=1.06"+/-0.09",
e=0.17+/-0.07, and i=32.5+/- 6.5 degrees. We utilized publicly available ALMA
CO data to constrain the inclination of the disk to i~28 degrees, which is
relatively co-planar with the orbit of the companion and consistent with
previous estimates from scattered light images. Finally, we input these
constraints into hydrodynamical and radiative transfer simulations to model the
structural evolution of the disk. We find that the spiral structure and
truncation of the circumprimary disk in HD 100453 are consistent with a
companion-dirven origin. Furthermore, we find that the primary star's rotation,
its outer disk, and the companion exhibit roughly the same direction of angular
momentum, and thus the system likely formed from the same parent body of
material.Comment: 28 pages, 11 figures, Accepted to Ap
Quantification and characterization of Ti-, Ce- and Ag5 nanoparticles in global surface waters and precipitation
Nanoparticle (NP) emissions to the environment are increasing as a result of anthropogenic activities, prompting concerns for ecosystems and human health. In order to evaluate the risk of NPs, it is necessary to know their concentrations in various environmental compartments on regional and global scales; however, these data have remained largely elusive due to the analytical difficulties of measuring NPs in complex natural matrices. Here, we measure NP concentrations and sizes for Ti-, Ce-, and Ag-containing NPs in numerous global surface waters and precipitation samples, and we provide insights into their compositions and origins (natural or anthropogenic). The results link NP occurrences and distributions to particle type, origin, and sampling location. Based on measurements from 46 sites across 13 countries, total Ti- and Ce-NP concentrations (regardless of origin) were often found to be within 104 to 107 NP mL–1, whereas Ag NPs exhibited sporadic occurrences with low concentrations generally up to 105 NP mL–1. This generally corresponded to mass concentrations of <1 ng L–1 for Ag-NPs, <100 ng L–1 for Ce-NPs, and <10 μg L–1 for Ti-NPs, given that measured sizes were often below 15 nm for Ce- and Ag-NPs and above 30 nm for Ti-NPs. In view of current toxicological data, the observed NP levels do not yet appear to exceed toxicity thresholds for the environment or human health; however, NPs of likely anthropogenic origins appear to be already substantial in certain areas, such as urban centers. This work lays the foundation for broader experimental NP surveys, which will be critical for reliable NP risk assessments and the regulation of nano-enabled products
A REAL WORLD COMPARISON BETWEEN THE ABBOTT TROPONIN-I AND THE ROCHE TROPONIN-T ASSAYS IN THE ASSESSMENT OF ACUTE MYOCARDIAL INJURY
PACES: Promoting Advancement through a Culture of Encouragement and Support
This poster describes the progress and lessons learned as a result of newly implemented Faculty Mentoring Program in the School of Liberal Arts (IUPUI
Recommended from our members
Two Auction-Based Resource Allocation Environments: Design and Experience
Many computer systems have reached the point where the goal of resource
allocation is no longer to maximize utilization; instead, when demand
exceeds supply and not all needs can be met, one needs a policy to guide
resource allocation decisions. One natural policy is to seek efficient usage,
which allocates resources to the set of users who have the highest utility for
the use of the resources. Researchers have frequently proposed market-based
mechanisms to provide such a goal-oriented way to allocate resources
among competing interests while maximizing overall utility of the users.Engineering and Applied Science
Direct Probe of Dark Energy Interactions with a Solar System Laboratory
In this NIAC (NASA Innovative Advanced Concepts) study, we embrace the challenge of direct detection of the galileon dark energy field in the Vainshtein model. We developed a mission concept to directly measure the galileon field using the solar system as a laboratory. The experiment scheme involves precise measurements of the trace of the total scalar force gradient tensor. A tetrahedral constellation off our spacecraft measures the "local" traces while orbiting about 1 AU (Astronomical Unit) away from the Sun and faraway from planets (Figure 1). The trace measurement is insensitive to the much stronger gravity field which satisfies the inverse square law and thus is traceless. Atomic test masses and atom interferometer measurement techniques are used as precise drag-free inertial references while laser ranging interferometers are employed to connect among atom interferometer pairs in spacecraft for the differential gradient force measurements. We conclude that such a mission is scientifically and technologically feasible. We show that a mission of 3-year measurement time would be able to provide high confidence statements (over 3 standard deviations) about the existence and strength of the cubic galileon field of the Sun. In addition, such a mission would also provide rich and diverse scientific data for testing any gravitational theory in general beyond the Newtonian gravity, hunting for ultra-light fields of dark matter, and detecting gravitational waves in the mid-frequency band between those of LIGO (Laser Interferometer Gravitational-Wave Observatory) and LISA (Laser Interferometer Space Antenna). For these reasons, we will term the mission concept Gravity Observation and Dark energy Detection Explorer in the Solar System (GODDESS)
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