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This research focused on documenting student computer science (CS) interest, value, and self-efficacy across K-8 grade levels. It also examined differences between various student subgroups. The research questions were: Are there differences in K-8 students’ ratings of CS interest, task value, and self-efficacy? How does interest, task value, and self-efficacy change across grades K-8? Are there differential effects depending on student gender, ethnicity, and locale (rural/urban)? Results showed a continuing decline in the three student outcomes across grades, mirroring the larger body of STEM research. Students’ perception of the value of computer science was significantly higher than their interest, which in turn was higher than their self-efficacy. This result suggests that student recognize the importance of CS and find it fun, but not easy. Moderation results showed no gender differences at the elementary level, but significantly higher middle school results for males on CS interest and self-efficacy. Ethnicity findings tended to favor majority (white) students, with the exception that grade 6 – 8 minority students had significantly higher interest ratings. Urban students had significantly higher results for all three outcomes at grades K-3 and 6 -8. The research extends research documenting the decrease of adolescent student STEM interest by focusing specifically on computer science and including results at the elementary level. 

Abstract This study probes the lithosphere‐asthenosphere system beneath 155 Ma Pacific seafloor using teleseismic S‐to‐p receiver functions at the Pacific Lithosphere Anisotropy and Thickness Experiment project ocean‐bottom‐seismometers. Within the lithosphere, a significant velocity decrease at 33–50 km depth is observed. This mid‐lithospheric discontinuity is consistent with the velocity contrast between the background mantle and thin, trapped layers of crystallized partial melt, in the form of either dolomite or garnet granulite. These melts possibly originated from deeper asthenospheric melting beneath the flanks of spreading centers, and were transported within the cooling lithosphere. A positive velocity increase of 3%–6% is observed at 130–155 km depth and is consistent with the base of a layer with partial melt in the asthenosphere. A shear velocity decrease associated with the lithosphere‐asthenosphere boundary at 95–115 km depth is permitted by the data, but is not required. 

Abstract We propose an integrated photonics device for mapping qubits encoded in the polarization of a photon onto the spin state of a solid-state defect coupled to a photonic crystal cavity: a “polarization-encoded photon-to-spin interface” (PEPSI). We perform a theoretical analysis of the state fidelity’s dependence on the device’s polarization extinction ratio and atom–cavity cooperativity. Furthermore, we explore the rate-fidelity trade-off through analytical and numerical models. In simulation, we show that our design enables efficient, high fidelity photon-to-spin mapping.