Angle diversity to increase coverage and position accuracy in 3D visible light positioning

The most common approach to light-based indoor positioning relies on multilateration of received signals to the mobile device. Any deficiencies in the fidelity of these light signals can significantly distort position estimates. In this paper, we propose a method to dynamically control the light distribution from the overhead luminaires to mitigate fading effects that would otherwise occur under static lighting. By manipulating the direction of the luminaire, effectively the dispersion pattern, we introduce signal diversity in the form of multiple pointing angles and light distributions. In addition to providing angle diversity, steering and then tracking sustains the maximal line-of-sight path between a source and receiver, which reduces angle-dependent attenuation and optimizes the signal-to-noise ratio for any coordinate without needing to change the physical properties of the source or receiver. This gain in signal strength combats the limited field-of-view of luminaires and photodiodes to provide better overall coverage, which translates directly to increase positioning accuracy, particularly in a 3D space. In the results, we show field-of-view gains of 43% and improvements in MSE of 20cm.Accepted manuscrip

Indoor 3D localization with low-cost LiFi components

Indoor positioning or localization is an enabling technology expected to have a profound impact on mobile applications. Various modalities of radio frequency, ultrasound, and light can be used for localization; in this paper we consider how visible light positioning can be realized for 3D positioning as a service comprised of optical sources as part of an overarching lighting infrastructure. Our approach, called Ray-Surface Positioning, uses one or more overhead luminaires, modulated as LiFi, and is used in conjunction with a steerable laser to realize position estimates in three dimensions. In this paper, we build and demonstrate Ray-Surface Positioning using low-cost commodity components in a test apparatus representing one quadrant of a 4m × 4m × 1m volume. Data are collected at regular intervals in the test volume representing 3D position estimates and is validated using a motion capture system. For the low-cost components used, results show position estimate errors of less than 30cm for 95% of the test volume. These results, generated with commodity components, show the potential for 3D positioning in the general case. When the plane of the receiver is known a priori, the position estimate error diminishes to the resolution of the steering mechanism.Accepted manuscrip

SoTL and the Humanities: Navigating Tensions, Realizing Possibilities

In this article, we share themes and tensions experienced by humanities faculty undertaking a scholarship of teaching & learning (SoTL) project as part of a multi-campus, grant-funded initiative. Faculty participants in the project iteratively transformed a course to improve one or more aspects of their students’ learning over a three-year period and documented the process and results in a course portfolio. To support their individual and collaborative work, each of the four campuses had a local leader, and participants met regularly with campus teams, convening with the full group annually for cross-campus knowledge exchange and peer review. At the project conclusion campus leaders gathered participant reflections and discovered a pattern of tensions that included: disciplinary ways of knowing, ways to represent knowing, and ways of writing and sharing. These tensions are similar to those identified elsewhere and can be potential impediments to this work for some in the humanities. Explicitly addressing those potential tensions while helping faculty see how their own disciplinary approaches can help them investigate their course practices is a useful first step toward more contributions from humanities scholars

ATLAS: A Model of Short-term European Electricity Market Processes under Uncertainty -- Balancing Modules

The ATLAS model simulates the various stages of the electricity market chain in Europe, including the formulation of offers by different market actors, the coupling of European markets, strategic optimization of production portfolios and, finally, real-time system balancing processes. ATLAS was designed to simulate the various electricity markets and processes that occur from the day ahead timeframe to real-time with a high level of detail. Its main aim is to capture impacts from imperfect actor coordination, evolving forecast errors and a high-level of technical constraints -- both regarding different production units and the different market constraints. This working paper describes the simulated balancing processes in detail and is the second part of the ATLAS documentation

Session A, 2015 First Place: Whatever the Case May Be: Investigating Trichoptera Diversity in Three Adirondack Streams

Caddisfly larvae are used as an indicator species for stream health. Anthropogenic development and pollution threaten the quality of streams and the diversity of macroinvertebrates such as caddisflies. The larvae develop in the stream in cases built from sand and organic matter and adults remain near the stream. We hypothesize that the diversity of larvae will be the same as the diversity of adults in three streams at Cranberry Lake Biological Station. Larvae were collected at ten sites in three streams near the campus using d-nets and forceps. Adults were caught at one site at each stream at night using a UV light trap. The ANOVA/Tukey’s Test, Shannon-Weiner Index, paired t-test, and Sorenson’s Coefficient were all performed to determine the difference in diversity between all three streams and between larvae and adults at each stream. The results of the ANOVA/Tukey’s Test showed no significant difference in diversity between all three sites. We reject our null hypothesis, as the paired t-test done for each stream site between aquatic and terrestrial samples showed no significant difference. We therefore conclude that terrestrial caddisfly diversity can be indicative of stream health

Effects of Intermittent Pneumatic Compression on Delayed Onset Muscle Soreness (DOMS) in Long Distance Runners

International Journal of Exercise Science 13(2): 75-86, 2020. The purpose of this study was to observe the effectiveness of intermittent pneumatic compression (IPC) on reducing C-reactive protein (CRP) and DOMS after long distance running.Ten distance runners, five males and five females, ages 20-53 years performed two 20-mile runs at 70% VO2max. Each run was followed by either no treatment (control) or IPC treatment for five consecutive days. For the IPC run, participants were treated for one hour immediately following the run and daily for five more days thereafter. On control runs, participants did not receive any treatment. Serum CRP was measured pre- and post-run, and daily thereafter for five days for both trials. Results indicated no significant difference (p \u3e 0.05) between control and treatment runs in CRP levels. Subjective pain ratings indicated no significant difference in pain between control and treatment runs. In conclusion, there appear to be no substantial benefits of IPC in promoting recovery