Driver Performance and Workload Using a Night Vision System

Night vision systems (NVS) have the potential to improve the visibility of critical objects at night beyond the levels achievable with low-beam headlamps. This could be especially valuable for older drivers, who have difficulty seeing at night and who are sensitive to glare. However, this benefit may also be accompanied by ancillary costs, such as the additional workload involved with monitoring and interpreting the forward view depicted by the NVS. In this study, we asked young and old subjects to drive at night on a test track while we measured distance and accuracy of target detection, subjective workload, and longitudinal control of the vehicle. In some conditions, direct view of the road was supplemented by a far-infrared NVS with two display configurations: a head-up display mounted above the dashboard, and a head-down display mounted near the vehicle midline. Night vision systems increased target detection distance for both young and old drivers, with noticeably more benefit for younger drivers. Although workload measures did not differ between the unassisted visual detection task and the NVS-assisted tasks, they were greater when driving with a detection task than without

The Crime of Product Counterfeiting: A Legal Analysis of the Usage of State-Level Statutes

This legal analysis of the state-level trademark counterfeiting criminal enforcement framework in the United States (“U.S.”) scrutinizes the use and non-use of state statutes to prosecute and convict trademark counterfeiters. Relying on state-level appellate court cases and conviction data, we found: (1) states inconsistently use and interpret criminal anti-counterfeiting statutes across the U.S.; and (2) strategies for building evidence in trademark counterfeiting criminal cases are strongest when based on cooperation with the victim (trademark owner). Based on our findings, to improve state-level anti-counterfeiting efforts, we recommend several best practices: Adoption of specific criminal trademark counterfeiting statutes if states do not already have a statute; Continued involvement and testimony by brand owners to distinguish between counterfeit and genuine product; and Continued and expanded collaboration and educational efforts between law enforcement, prosecutors, private investigators, and brand owners regarding trademark counterfeiting, as well as the potential danger to the health and safety of the public and possible connections to organized crime and terrorism

Measuring Population Transmission Potential for HIV: An Alternative Metric of Transmission Risk in Men who have Sex with Men (MSM) in the US

Background Various metrics for HIV burden and treatment success [e.g. HIV prevalence, community viral load (CVL), population viral load (PVL), percent of HIV-positive persons with undetectable viral load] have important public health limitations for understanding disparities. Methods and Findings Using data from an ongoing HIV incidence cohort of black and white men who have sex with men (MSM), we propose a new metric to measure the prevalence of those at risk of transmitting HIV and illustrate its value. …See full text for complete abstract

Rapid Development of the Seeker Free-Flying Inspector Guidance, Navigation, and Control System

Seeker is an automated extravehicular free-flying inspector CubeSat designed and built in-house at the Johnson Space Center (JSC). As a Class 1E project funded by the International Space Station (ISS) Program, Seeker had a streamlined process to flight certification, but the vehicle had to be designed, developed, tested, and delivered within approximately one year after authority to pro-ceed (ATP) and within a $1.8 million budget. These constraints necessitated an expedited Guidance, Navigation, and Control (GNC) development schedule, development began with a navigation sensor trade study using Linear Covariance (LinCov) analysis and a rapid sensor downselection process, resulting in the use of commercial off-the-shelf (COTS) sensors which could be procured quickly and subjected to in-house environmental testing to qualify them for flight. A neural network was used to enable a COTS camera to provide bearing measurements for visual navigation. The GNC flight software (FSW) algorithms utilized lean development practices and leveraged the Core Flight Software (CFS) architecture to rapidly develop the GNC system, tune the system parameters, and verify performance in simulation. This pace was anchored by several Hardware-Software Integration (HSI) milestones, which forced the Seeker GNC team to develop the interfaces both between hardware and software and between the GNC domains early in the project and to enable a timely delivery

Sex-Specific Alterations in NOS Regulation of Vascular Function in Aorta and Mesenteric Arteries from Spontaneously Hypertensive Rats Compared to Wistar Kyoto Rats

The present study tested the hypothesis that spontaneously hypertensive rats (SHR) have impaired nitric oxide synthase (NOS)-mediated regulation of vascular function versus Wistar-Kyoto rats (WKY). Aorta and small mesenteric arteries were studied from male and female SHR (M SHR and F SHR) and WKY (M WKY and F WKY). Phenylephrine (PE)-induced vasoconstriction was greater in aorta of M SHR versus all others (P \u3c 0.05); there were neither sex nor strain differences in PE contraction in mesenteric arteries. The NOS inhibitor l-Nitro-Arginine Methyl Ester (l-NAME) increased PE-induced vasoconstriction in all rats, although the increase was the least in male SHR (P \u3c 0.05), revealing a blunted vasoconstrictor buffering capacity of NOS. l-NAME increased sensitivity to PE-induced constriction only in mesenteric arteries of SHR, although, the maximal percent increase in contraction was comparable among groups. ACh-induced relaxation was also less in aorta from M SHR versus all others (P \u3c 0.05). ACh relaxation was comparable among groups in mesenteric arteries, although SHR exhibited a greater NOS component to ACh-induced relaxation than WKY. To gain mechanistic insight into sex and strain differences in vascular function, NOS activity and NOS3 protein expression were measured. Aortic NOS activity was comparable between groups and M SHR had greater NOS3 expression than M WKY. In contrast, although vascular function was largely maintained in mesenteric arteries of SHR, NOS activity was less in SHR versus WKY. In conclusion, M SHR exhibit a decrease in NOS regulation of vascular function compared to F SHR and WKY, although this is not mediated by decreases in NOS activity and/or expression

How unique was Hurricane Sandy? Sedimentary reconstructions of extreme flooding from New York Harbor

© The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Scientific Reports 4 (2014): 7366, doi:10.1038/srep07366.The magnitude of flooding in New York City by Hurricane Sandy is commonly believed to be extremely rare, with estimated return periods near or greater than 1000 years. However, the brevity of tide gauge records result in significant uncertainties when estimating the uniqueness of such an event. Here we compare resultant deposition by Hurricane Sandy to earlier storm-induced flood layers in order to extend records of flooding to the city beyond the instrumental dataset. Inversely modeled storm conditions from grain size trends show that a more compact yet more intense hurricane in 1821 CE probably resulted in a similar storm tide and a significantly larger storm surge. Our results indicate the occurrence of additional flood events like Hurricane Sandy in recent centuries, and highlight the inadequacies of the instrumental record in estimating current flood risk by such extreme events.Funding for this work was provided by the Hudson River Foundation Expedited Grant #004/12E, the Hudson River Foundation Graduate Fellowship 02–13, the National Science Foundation (RAPID grant #1313859 and instrument and facility support via grant IF-0949313), and the Dalio Explore Fund

A Principal Components Analysis Approach to Quantifying Foot Clearance and Foot Clearance Variability

Low foot clearance and high variability may be related to falls risk. Foot clearance is often defined as the local minimum in toe height during swing; however, not all strides have this local minimum. The primary purpose of this study was to identify a nondiscrete measure of foot clearance during all strides, and compare discrete and nondiscrete measures in ability to rank individuals on foot clearance and variability. Thirty-five participants (young adults [n = 10], older fallers [n = 10], older nonfallers [n = 10], and stroke survivors [n = 5]) walked overground while lower extremity 3D kinematics were recorded. Principal components analysis (PCA) of the toe height waveform yielded representation of toe height when it was closest to the ground. Spearman\u27s rank order correlation assessed the association of foot clearance and variability between PCA and discrete variables, including the local minimum. PCA had significant (P \u3c.05) moderate or strong associations with discrete measures of foot clearance and variability. An approximation of the discrete local minimum had a weak association with PCA and other discrete measures of foot clearance. A PCA approach to quantifying foot clearance can be used to identify the behavioral components of toe height when it is closest to the ground, even for strides without a local minimum

A survey of driver opinion about carbon capture in vehicles

An online survey of driver opinion was conducted to determine how receptive drivers would be to in-vehicle technologies that reduce carbon emissions. In particular, the survey was designed to help understand whether drivers considered such technology attractive and, if so, what level of cost would be acceptable to adopt this technology. Cost was evaluated in three dimensions: initial monetary cost, reduction in fuel economy, and reduction in available cargo space. The analysis was based on 536 useable surveys. Among the surveyed drivers, acceptability of carbon-capture technology depended on driver belief that human activity is associated with global warming. Drivers that reported agreement with such statements were found to be more accepting of in-vehicle carbon capture technology: they were generally willing to pay more for this technology or to trade storage space and fuel economy for such technology. Overall, respondents appeared to be willing to pay about $100 for a 20in carbon dioxide emissions and$250 for an 80% reduction; they also appeared to accept about a 5% reduction in fuel economy for a 20% reduction in carbon dioxide emissions, and a 10% reduction in fuel economy for a 80% reduction; and finally, they appeared willing to accept about a 10% loss in trunk space for a 20% reduction in emissions, and a 16% loss in trunk space for an 80% reduction in emissions.The University of Michigan Sustainable Worldwide Transportationhttp://deepblue.lib.umich.edu/bitstream/2027.42/99754/1/102964.pd