Social Media’s Effect on Mental Health: How America’s Youth are More Vulnerable to its Negative Implications

This article explores the potentially negative psychological effects social media photo-sharing platforms have on America’s adolescents. While most studies on mental health effects related to social media use have focused on Facebook and the young adult age group 18-35, this article focuses on users under the age of 18 with an emphasis on Instagram and Snapchat – the two most rapidly growing social networking sites for adolescents. Photo-sharing sites have characteristics different than other social media sites, specifically the ability to alter photos and to communicate live time through videos and photos, which may have different mental health consequences on younger populations. Through a review of previous academic research, and a survey administered to a sample population under the age of 18, this article analyzes how social comparisons, a need for external validation, and a fear of missing out and exclusion may affect adolescents more than older adults due to the fact that they are in a critical developmental period where self-esteem and self-worth can be particularly influenced by peers and social media. While some argue that social media, including photo-sharing sites, may allow adolescents more social contact, opportunities for self-esteem building, and a chance for those who are shy or with low self-esteem to experiment in a safer environment than face to face contact, this article shows that the opposite is also true: that excessive use of photo-sharing sites may lead to negative mental health consequences due to social comparisons, a fear of missing out, and an unhealthy desire to attain external validation from peers. The article also suggests that adolescents with deceptive personalities, Machiavellian personalities, and high social desirability needs may be more vulnerable to some of the risks of social media use, and that identifying at-risk individuals may allow teachers, counselors, and parents to help them navigate their social media world during an influential time in their lives

Introduction: law, technology, and entertainment in … Pittsburgh???

What do law, technology and entertainment have to do with Pittsburgh? Unless you work in the entertainment industry, the answer may surprise you

Asymmetry and structural information in preferential attachment graphs

Graph symmetries intervene in diverse applications, from enumeration, to graph structure compression, to the discovery of graph dynamics (e.g., node arrival order inference). Whereas Erd\H{o}s-R\'enyi graphs are typically asymmetric, real networks are highly symmetric. So a natural question is whether preferential attachment graphs, where in each step a new node with $m$ edges is added, exhibit any symmetry. In recent work it was proved that preferential attachment graphs are symmetric for $m=1$, and there is some non-negligible probability of symmetry for $m=2$. It was conjectured that these graphs are asymmetric when $m \geq 3$. We settle this conjecture in the affirmative, then use it to estimate the structural entropy of the model. To do this, we also give bounds on the number of ways that the given graph structure could have arisen by preferential attachment. These results have further implications for information theoretic problems of interest on preferential attachment graphs.Comment: 24 pages; to appear in Random Structures & Algorithm

Cryogenic shutter

A magnetically operated shutter mechanism is provided that will function in cryogenic or cryogenic zero gravity environments to selectively block radiation such as light from passing through a window to a target object such as a mirror or detector located inside a cryogenic container such as a dewar. The mechanism includes a shutter paddle blade that is moved by an electromagnetically actuated torquing device between an open position where the target object is exposed to ambient radiation or light and a closed position where the shutter paddle blade shields the ambient radiation or light from the target object. The purpose of the shuttering device is to prevent the mirror or other target object from being directly exposed to radiation passing through the window located on the side wall of the dewar, thereby decreasing or eliminating any temperature gradient that would occur within the target object due to exposure to the radiation. A special nylon bearing system is utilized to prevent the device from binding during operation and the paddle blade is also thermally connected to a reservoir containing cryogen to further reduce the internal temperature