30 research outputs found
Binsted.et.al_ERL_LAC_stranded.assets_data.zip
No full textThis file contains the data used to create all figures (main manuscript and supplementary information) for M. Binsted et al. (2019) "Stranded asset implications of the Paris Agreement in Latin America and the Caribbean" (https://doi.org/10.1088/1748-9326/ab506d)
GCAM-USA v5.3_water_dispatch
No full textThis repository contains the code used to create the GCAM-USA outputs represented in the Binsted et al. 2021 submission "GCAM-USA v5.3_water_dispatch: Integrated modeling of subnational U.S. energy, water, and land systems within a global framework
The impacts of material supply availability on a transitioning electric power sector, code and data
No full text<p>This repository contains all the code and data used for the study entitled "The impacts of material supply availability on a transitioning electric power sector".</p>
Action without awareness: reaching to an object you do not remember seeing.
No full textBACKGROUND: Previous work by our group has shown that the scaling of reach trajectories to target size is independent of obligatory awareness of that target property and that "action without awareness" can persist for up to 2000 ms of visual delay. In the present investigation we sought to determine if the ability to scale reaching trajectories to target size following a delay is related to the pre-computing of movement parameters during initial stimulus presentation or the maintenance of a sensory (i.e., visual) representation for on-demand response parameterization. METHODOLOGY/PRINCIPAL FINDINGS: Participants completed immediate or delayed (i.e., 2000 ms) perceptual reports and reaching responses to different sized targets under non-masked and masked target conditions. For the reaching task, the limb associated with a trial (i.e., left or right) was not specified until the time of response cuing: a manipulation that prevented participants from pre-computing the effector-related parameters of their response. In terms of the immediate and delayed perceptual tasks, target size was accurately reported during non-masked trials; however, for masked trials only a chance level of accuracy was observed. For the immediate and delayed reaching tasks, movement time as well as other temporal kinematic measures (e.g., times to peak acceleration, velocity and deceleration) increased in relation to decreasing target size across non-masked and masked trials. CONCLUSIONS/SIGNIFICANCE: Our results demonstrate that speed-accuracy relations were observed regardless of whether participants were aware (i.e., non-masked trials) or unaware (i.e., masked trials) of target size. Moreover, the equivalent scaling of immediate and delayed reaches during masked trials indicates that a persistent sensory-based representation supports the unconscious and metrical scaling of memory-guided reaching
ANSIBLE: Virtual Reality for Behavioral Health
No full textAbstractWe describe a virtual reality telecommunications ecosystem developed under funding from NASA entitled ANSIBLE: A Network of Social Interactions for Bilateral Life Enhancement. ANSIBLE is a communication support toolset which enables multi-faceted human-human and human-virtual agent interactions designed to accommodate technical and environmental limitations of long duration space flight. The primary objectives are to address communication limitations and provide telehealth options to combat behavioral health threats in future long duration exploration class missions. The system is current being evaluated in a human subject study that takes place at the Hawaii Space Exploration Analog and Simulation (HI-SEAS) facilities in Waimea, HI. There, an international mixed gender group of scientists are undergoing adjustments in physiology and lifestyle that are analogous to some of the challenges in a confined environment over twelve month isolation mission under Mars-exploration conditions (e.g. with communication latencies and blackouts, in close quarters, under restricted water and energy use). Preliminary analysis show that the ANSIBLE treatment group scored better perceived social closeness and perceived relationship satisfaction in self-report surveys compared to a control group who participated in a prior eight month isolation mission in the same facility and used only conventional asynchronous communication methods (i.e. email, voice and video recordings). In the real world, verbal interactions go hand-in-hand with interactions with tangible things. Virtual items can be called upon to serve as powerful and meaningful aides for communications. We posit that the observed increase in social connectedness is due to the affordances of VR, where situational contexts that are often not communicated in traditional telecommunications are made explicit in the virtual world
Can updated climate pledges limit warming well below 2°C? Increased ambition and implementation are essential
No full textVisually and memory-guided grasping: Aperture shaping exhibits a time-dependent scaling to Weber’s law
No full textAbstractThe ‘just noticeable difference’ (JND) represents the minimum amount by which a stimulus must change to produce a noticeable variation in one’s perceptual experience and is related to initial stimulus magnitude (i.e., Weber’s law). The goal of the present study was to determine whether aperture shaping for visually derived and memory-guided grasping elicit a temporally dependent or temporally independent adherence to Weber’s law. Participants were instructed to grasp differently sized objects (20, 30, 40, 50 and 60mm) in conditions wherein vision of the grasping environment was available throughout the response (i.e., closed-loop), when occluded at movement onset (i.e., open-loop), and when occluded for a brief (i.e., 0ms) or longer (i.e., 2000ms) delay in advance of movement onset. Within-participant standard deviations of grip aperture (i.e., the JNDs) computed at decile increments of normalized grasping time were used to determine participant’s sensitivity to detecting changes in object size. Results showed that JNDs increased linearly with increasing object size from 10% to 40% of grasping time; that is, the trial-to-trial stability (i.e., visuomotor certainty) of grip aperture (i.e., the comparator) decreased with increasing object size (i.e., the initial stimulus). However, a null JND/object size scaling was observed during the middle and late stages of the response (i.e., >50% of grasping time). Most notably, the temporal relationship between JNDs and object size scaling was similar across the different visual conditions used here. Thus, our results provide evidence that aperture shaping elicits a time-dependent early, but not late, adherence to the psychophysical principles of Weber’s law
