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Related Concept Videos

Collisions in Multiple Dimensions: Problem Solving01:06

Collisions in Multiple Dimensions: Problem Solving

In multiple dimensions, the conservation of momentum applies in each direction independently. Hence, to solve collisions in multiple dimensions, we should write down the momentum conservation in each direction separately. To help understand collisions in multiple dimensions, consider an example.
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
Collisions in Multiple Dimensions: Introduction01:05

Collisions in Multiple Dimensions: Introduction

It is far more common for collisions to occur in two dimensions; that is, the initial velocity vectors are neither parallel nor antiparallel to each other. Let's see what complications arise from this. The first idea is that momentum is a vector. Like all vectors, it can be expressed as a sum of perpendicular components (usually, though not always, an x-component and a y-component, and a z-component if necessary). Thus, when the statement of conservation of momentum is written for a problem,...
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Counterfactual Thinking

Counterfactual thinking is a cognitive process wherein individuals mentally reconstruct alternative versions of past events, often beginning with “what if” or “if only.” This reflective mechanism plays a significant role in shaping emotional experiences and guiding future behavior. Though typically triggered by unfavorable or unexpected outcomes, counterfactual thinking can also emerge in mundane, everyday decisions and experiences, revealing its deep entrenchment in human cognition.Types of...
Crossing Over01:30

Crossing Over

Crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. Genetic recombination gives rise to allelic diversity in the newly formed daughter cells. In humans, crossing over produces genetically distinct haploid egg and sperm cells that undergo fertilization to produce unique offspring. Before cell division starts, the germ cell’s chromosome(s) undergo duplication in the S phase of the cell cycle. As the cells enter prophase I, duplicated...
Crossing Over01:34

Crossing Over

Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process called synapsis.
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Crossing over01:34

Crossing over

Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
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In order to...

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Updated: May 21, 2026

Photorealistic Learned Landscapes for Augmented Reality
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Published on: June 27, 2025

Grand Challenges in Cross Reality.

Christoph Anthes, Mark Billinghurst, Uwe Grunefeld

    IEEE Transactions on Visualization and Computer Graphics
    |May 19, 2026
    PubMed
    Summary
    This summary is machine-generated.

    Cross Reality (CR) integrates various stages of the reality-virtuality continuum, connecting users across Augmented Reality and Virtual Reality. This research outlines 22 future research challenges in CR, serving as a roadmap for the emerging field.

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    A Networked Desktop Virtual Reality Setup for Decision Science and Navigation Experiments with Multiple Participants
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    A Networked Desktop Virtual Reality Setup for Decision Science and Navigation Experiments with Multiple Participants

    Published on: August 26, 2018

    Area of Science:

    • Computer Science
    • Human-Computer Interaction
    • Virtual Reality

    Background:

    • Cross Reality (CR) is an emerging field leveraging advancements in Mixed Reality hardware.
    • The increasing market penetration of video-based see-through Head-Mounted Displays fuels CR development.

    Purpose of the Study:

    • To identify and define key research challenges in the field of Cross Reality.
    • To establish a roadmap for future research directions in CR.

    Main Methods:

    • The study involved discussions among researchers at the 1st Joint Workshop on Cross Reality (IEEE ISMAR 2023).
    • Six topic groups were formed to discuss and identify 22 specific challenges over several months.

    Main Results:

    • Twenty-two distinct challenges across six identified topic groups within Cross Reality were defined.
    • The identified challenges cover the spectrum from real environments to fully immersive virtual reality.

    Conclusions:

    • The identified challenges provide a comprehensive roadmap for future research in Cross Reality.
    • This work aims to guide the progression of CR applications and technologies.