The Cost of Doing Business? Corporate Registration as Valid Consent to General Personal Jurisdiction

Every state has a statute that requires out-of-state corporations to register with a designated official before doing business there, but courts disagree on what impact, if any, those statutes can or should have on personal jurisdiction doctrine. A minority of states interpret compliance with their registration statutes as the company’s consent to general personal jurisdiction, meaning it can be sued on any cause of action there, even those unrelated to the company’s conduct in that state. The United States Supreme Court upheld this “consent by registration” theory over 100 years ago, but since then has manifested a sea change in personal jurisdiction jurisprudence that leaves its continued viability in limbo. Two decisions by the Court from the 2010s—Goodyear Dunlop Tire Operations, S.A. v. Brown and Daimler AG v. Bauman—drastically contracted the scope of contacts-based general jurisdiction but did not appear to address the contours of consent jurisdiction. The palpable discord makes it high time for the issue to reach the Supreme Court, as it has in the high courts of four states in 2021 alone. So, the question remains: what is left of consent by registration? Many courts and scholars have rejected the theory, reasoning that a corporation cannot give valid, knowing consent to general jurisdiction by simply complying with a state business registration statute. This Note sets out to address these concerns; it suggests that, under certain legal frameworks—where either explicit statutory language or controlling decisional law makes clear to corporations the jurisdictional consequences of registration—corporations can indeed give valid, informed consent to general jurisdiction by registering to do business in the state

Developing a student mental health policy for a South African university: Consultation, contestation and compromise

Given high rates of student mental health difficulties globally, the need for universities to have a student mental health policy has been increasingly recognised. In the South African context, such policies must not only balance the mental health needs of students with the realistic constraints of university resources in a time of austerity, but also engage with complexities posed by the Global North foundations of the fields of psychology and psychiatry and the systemic determinants of mental health. This article describes the development of a student mental health policy at a South African university, with a focus on points of contestation that emerged out of a broad-based institutional consultation process. Areas of contestation included the scope of university support for student mental health, defining mental health difficulties, the use of a disability framework for mental health, and processes of verification. All of these were embedded within a broader tension between health and social justice discourses. The compromises that were designed to balance these complexities within the student mental health policy are discussed, and reflections are offered that may inform the development of student mental health policies at other South African universities

Assessing post-traumatic stress disorder in South African adolescents: using the child and adolescent trauma survey (CATS) as a screening tool

BACKGROUND: Several studies have demonstrated that South African children and adolescents are exposed to high levels of violent trauma with a significant proportion developing PTSD, however, limited resources make it difficult to accurately identify traumatized children. METHODS: A clinical interview (K-SADS-PL, selected modules) and self-report scale (CATS) were compared to determine if these different methods of assessment elicit similar information with regards to trauma exposure and post-traumatic stress disorder (PTSD) in adolescents. Youth (n = 58) from 2 schools in Cape Town, South Africa participated. RESULTS: 91% of youth reported having been exposed to a traumatic event on self-report (CATS) and 38% reported symptoms severe enough to be classified as PTSD. On interview (K-SADS-PL), 86% reported exposure to a traumatic event and 19% were found to have PTSD. While there were significant differences in the rates of trauma exposure and PTSD on the K-SADS and CATS, a cut-off value of 15 on the CATS maximized both the number of true positives and true negatives with PTSD. The CATS also differentiated well between adolescents meeting DSM-IV PTSD symptom criteria from adolescents not meeting criteria. CONCLUSIONS: Our results indicate that trauma exposure and PTSD are prevalent in South African youth and if appropriate cut-offs are used, self-report scales may be useful screening tools for PTSD

Imaging of Iso-frequency Contours via Resonance-Enhanced Scattering in Near-Pristine Photonic Crystals

The iso-frequency contours of a photonic crystal are important for predicting and understanding exotic optical phenomena that are not apparent from high-symmetry band structure visualizations. Here, we demonstrate a method to directly visualize the iso-frequency contours of high-quality photonic crystal slabs that shows quantitatively good agreement with numerical results throughout the visible spectrum. Our technique relies on resonance-enhanced photon scattering from generic fabrication disorder and surface roughness, so it can be applied to general photonic and plasmonic crystals, or even quasi-crystals. We also present an analytical model of the scattering process, which explains the observation of iso-frequency contours in our technique. Furthermore, the iso-frequency contours provide information about the characteristics of the disorder and therefore serve as a feedback tool to improve fabrication processes.Comment: 8 pages, 5 figure

Laser-Induced Linear Electron Acceleration in Free Space

Linear acceleration in free space is a topic that has been studied for over 20 years, and its ability to eventually produce high-quality, high energy multi-particle bunches has remained a subject of great interest. Arguments can certainly be made that such an ability is very doubtful. Nevertheless, we chose to develop an accurate and truly predictive theoretical formalism to explore this remote possibility in a computational experiment. The formalism includes exact treatment of Maxwell's equations, exact relativistic treatment of the interaction among the multiple individual particles, and exact treatment of the interaction at near and far field. Several surprising results emerged. For example, we find that 30 keV electrons (2.5% energy spread) can be accelerated to 7.7 MeV (2.5% spread) and to 205 MeV (0.25% spread) using 25 mJ and 2.5 J lasers respectively. These findings should hopefully guide and help develop compact, high-quality, ultra-relativistic electron sources, avoiding conventional limits imposed by material breakdown or structural constraints.Comment: Supplementary Information starts on pg 1

All-angle negative refraction of highly squeezed plasmon and phonon polaritons in graphene-boron nitride heterostructures

A fundamental building block for nanophotonics is the ability to achieve negative refraction of polaritons, because this could enable the demonstration of many unique nanoscale applications such as deep-subwavelength imaging, superlens, and novel guiding. However, to achieve negative refraction of highly squeezed polaritons, such as plasmon polaritons in graphene and phonon polaritons in boron nitride (BN) with their wavelengths squeezed by a factor over 100, requires the ability to flip the sign of their group velocity at will, which is challenging. Here we reveal that the strong coupling between plasmon and phonon polaritons in graphene-BN heterostructures can be used to flip the sign of the group velocity of the resulting hybrid (plasmon-phonon-polariton) modes. We predict all-angle negative refraction between plasmon and phonon polaritons, and even more surprisingly, between hybrid graphene plasmons, and between hybrid phonon polaritons. Graphene-BN heterostructures thus provide a versatile platform for the design of nano-metasurfaces and nano-imaging elements.Comment: 16 pages; 3 figure