Time reversal and spatial inversion are two key symmetries for conventional Bardeen-Cooper-Schrieffer (BCS) superconductivity1. Breaking inversion symmetry can lead to mixed-parity Cooper pairing and unconventional superconducting properties1-5. Two-dimensional (2D) NbSe2 has emerged as a new non-centrosymmetric superconductor with the unique out-of-plane or Ising spin-orbit coupling (SOC)6-9. Here we report the observation of an unusual continuous paramagnetic-limited superconductor-normal metal transition in 2D NbSe2.

Despite the significant amount of time undergraduate students spend in introductory physics labs, there is little consensus on instructional goals and accepted diagnostic assessments for these labs. In response to these issues, we have developed the Physics Lab Inventory of Critical thinking (PLIC) to assess students' proficiency with critical thinking in a physics lab context. Specifically, the PLIC aims to evaluate students' skills in making sense of data, variability, models, and experimental methods and to assess the effectiveness of lab courses at developing these skills.

Many institutions are changing the focus of their introductory physics labs from verifying physics content towards teaching students about the skills and nature of science. As instruction shifts, so too will the ways students approach and behave in the labs. In this study, we evaluated students' lab notes from an early activity in an experimentation-focused lab course.

(Cell 172, 344–357.e1–e7; January 11, 2018) Our paper reported a mechanism where E. coli transcription-coupled repair factor Mfd utilizes DNA translocation to dynamically regulate transcription. We have identified three minor errors in the manuscript.

As educational technologies become increasingly important in K-12 physics education, it is important to understand why and how teachers choose to adopt certain technologies. We examined 2000 responses from a survey of high school teachers on how they used PhET interactive simulations (mostly in physics) and what value they felt it provided their students. The analysis helps inform what aspects of an educational technology support or hinder its adoption. First, the teachers valued flexibility.

We report in situ time-resolved measurements of the dynamic evolution of the volume fraction of extension twins in polycrystalline pure magnesium and in the AZ31B magnesium alloy, using synchrotron x-ray diffraction during compressive loading at high strain rates. The dynamic evolution of the twinning volume fraction leads to a dynamic evolution of the texture. Although both the pure metal and the alloy had similar initial textures, we observe that the evolution of texture is slower in the alloy.

The optical characteristics of MoS2 monolayers on SiO2/Si substrates with an SiO2 thickness ranging from 40 to 130 nm are investigated. The measured Raman and optical reflection spectra of the MoS2 monolayers vary considerably depending on the SiO2 thickness. The Raman peak intensity of the MoS2 monolayer on the substrate with an 80 nm thick SiO2 layer is four times larger than those in the cases of 40- and 130 nm thick SiO2 layers, indicating a significant difference in the absorption at the excitation wavelength.

Mounting evidence suggests that altered lubricant levels within synovial fluid have acute biological consequences on chondrocyte homeostasis. While these responses have been connected to increased friction, the mechanisms behind this response remain unknown. Here, we combine a frictional bioreactor with confocal elastography and image-based cellular assays to establish the link between cartilage friction, microscale shear strain, and acute, adverse cellular responses.

In amniotes, the development of the primitive streak and its accompanying 'organizer' define the first stages of gastrulation. Although these structures have been characterized in detail in model organisms, the human primitive streak and organizer remain a mystery. When stimulated with BMP4, micropatterned colonies of human embryonic stem cells self-organize to generate early embryonic germ layers 1 .

Students' expectations about a class (their 'frames') affect how they interpret, approach, and accomplish tasks. However, little is known about students' framing of lab activities. During the first lab of a sequence designed to teach students about modeling and critical thinking with data, students test a simple model of a pendulum that breaks down with improved measurements. Using in-lab video and follow-up interviews, we identified students' frequent use of a model-verifying frame that substantially interferes with the instructional goals.