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Submissions to the third Gallery of Soft Matter include stunning and thoughtfully crafted images and videos which we hope will captivate both scientists and the general public. It is our pleasure to share the five winning entries in this PRE Guest Editorial.
Both the predictive power and the memory storage capability of an artificial neural network called a reservoir computer increase when time delays are added into how the network processes signals, according to a new model.
Plants generally orient their growth against the direction of gravity. Rotating them around an axis perpendicular to gravity can produce more complicated growth shapes that depend on the speed of rotation. The authors model this behavior and find a stable family of three-dimensional dynamic equilibria.
Photon correlation spectroscopy is used to examine microscopic dynamics of Brownian suspensions within small spherical droplets. The authors first validate the setup and then demonstrate the method with a study of the shrinking and swelling of millimeter-sized polymer hydrogel beads. Their space-resolved measurements provide new information on microscopic rearrangements occurring during gel swelling.
The authors introduce a model for B cell affinity maturation, the process by which a B cell acquires specificity for an introduced antigen. They consider how vaccination with two antigens with the same subdominant antigenic region affects the antibody pool. Their results suggest guidelines for preparation of antigen cocktails that generate broadly neutralizing antibodies.
APS congratulates Andrea Marcello Mambuca, Chiara Cammarota, and Izaak Neri as the recipients of the 2024 Irwin Oppenheim Award for best paper by early career scientists published in Physical Review E.
This paper investigates, by means of an analytically solvable one-dimensional model, the dissipation in a turbulent, nearly collisionless plasma. When applying a stochastic, external electric field, it is reported that the generalized entropy of the distribution function cascades from large to small scales in position and velocity space, rendering the stochastic heating irreversible.
The study of soliton gases, large ensembles of interacting solitons, has received rapidly growing interest due to deep connections with other phenomena and various areas of physics. This Perspective reviews the main recent theoretical and experimental results in the field, and discusses various open questions and future challenges.
APS has selected 156 Outstanding Referees for 2024 who have demonstrated exceptional work in the assessment of manuscripts published in the Physical Review journals. A full list of the Outstanding Referees is available online.
We welcome Valerio Lucarini (University of Reading, UK), who joins the editorial staff of Physical Review E. As Associate Editor, he will be handling manuscripts in the section on Nonlinear Dynamics and Chaos.
On the following pages you will find our latest guidelines arranged into five clear sections: Safety, Performance, Business, Design, and Legal. The App Store is always changing and improving to keep up with the needs of our customers and our products. Your apps should change and improve as well in order to stay on the App Store.
Apps with user-generated content present particular challenges, ranging from intellectual property infringement to anonymous bullying. To prevent abuse, apps with user-generated content or social networking services must include:
The Kids Category is a great way for people to easily find apps that are designed for children. If you want to participate in the Kids Category, you should focus on creating a great experience specifically for younger users. These apps must not include links out of the app, purchasing opportunities, or other distractions to kids unless reserved for a designated area behind a parental gate. Keep in mind that once customers expect your app to follow the Kids Category requirements, it will need to continue to meet these guidelines in subsequent updates, even if you decide to deselect the category. Learn more about parental gates.
You must comply with applicable privacy laws around the world relating to the collection of data from children online. Be sure to review the Privacy section of these guidelines for more information. In addition, Kids Category apps may not send personally identifiable information or device information to third parties. Apps in the Kids Category should not include third-party analytics or third-party advertising. This provides a safer experience for kids. In limited cases, third-party analytics may be permitted provided that the services do not collect or transmit the IDFA or any identifiable information about children (such as name, date of birth, email address), their location, or their devices. This includes any device, network, or other information that could be used directly or combined with other information to identify users and their devices. Third-party contextual advertising may also be permitted in limited cases provided that the services have publicly documented practices and policies for Kids Category apps that include human review of ad creatives for age appropriateness.
Apps may offer certain software that is not embedded in the binary, specifically HTML5 mini apps and mini games, streaming games, chatbots, and plug-ins. Additionally, retro game console emulator apps can offer to download games. You are responsible for all such software offered in your app, including ensuring that such software complies with these Guidelines and all applicable laws. Software that does not comply with one or more guidelines will lead to the rejection of your app. You must also ensure that the software adheres to the additional rules that follow in 4.7.1 through 4.7.5. These additional rules are important to preserve the experience that App Store customers expect, and to help ensure user safety.