Quantum Error Correction on Superconducting Processors: A Short Communication
We benchmark surface code and repetition code implementations on 5 commercial superconducting quantum processors. Logical error rates per cycle range from 3.1e-3 to 8.7e-3, with threshold fidelities between 98.4-99.2%. Gate…
Observation of Non-Hermitian Skin Effect in Acoustic Metamaterials
We experimentally realize the non-Hermitian skin effect in a 1D acoustic metamaterial with engineered gain and loss. The bulk-boundary correspondence breakdown is characterized by eigenvalue winding numbers and localization lengths.…
Topological Superconductivity in Hybrid Semiconductor-Superconductor Nanowires
We report experimental evidence of topological superconductivity in InAs/Al hybrid nanowires with epitaxial interfaces. Tunneling conductance spectroscopy reveals zero-bias peaks consistent with Majorana zero modes persisting over a 200 mT…
Endangered Language Revitalization through Digital Immersion Programs: Lessons from Welsh
An evaluation of Welsh-medium digital immersion programs targeting adult heritage speakers (N=1,200) over three years. Participants showed statistically significant gains in oral fluency (d=0.81) and written proficiency (d=0.67). Motivation and…
L2 Acquisition of Tonal Contrasts: A Longitudinal Study of Mandarin Learners
A two-year longitudinal study of 68 English-speaking learners of Mandarin tracks tonal accuracy development using acoustic measurements and perceptual judgments. Results reveal a U-shaped trajectory for Tone 3 distinct from…
Code-Switching Patterns in Multilingual Social Media: A Corpus Study
We analyze a 4.2-million-token corpus of multilingual Twitter data to characterize intra-sentential code-switching across English-Spanish, English-Arabic, and English-Mandarin pairs. Matrix language frame analysis reveals systematic asymmetries in embedding language selection…
Monetary Policy Transmission in Post-Pandemic Economies: Evidence from 40 Countries
This review synthesizes empirical evidence on monetary policy transmission across 40 economies from 2020 to 2024, characterized by historically high inflation and unconventional tools. We document structural breaks in interest…
Trade War Spillovers: The Effect of US-China Tariffs on ASEAN Export Patterns
Difference-in-differences analysis of HS6-digit trade flows shows that US-China tariff escalation from 2018-2020 generated significant trade diversion to ASEAN economies. Vietnam, Malaysia, and Thailand captured the largest export gains in…
Digital Currency Adoption and Financial Inclusion in Sub-Saharan Africa
Using household survey data from 14 Sub-Saharan African countries (N=87,420), we examine determinants of mobile money and CBDC adoption. Instrumental variable estimates suggest a 10-percentage-point increase in mobile internet penetration…
Microplastic Accumulation in Deep-Sea Sediments of the South Atlantic Ocean
Core samples from 18 deep-sea stations (2,200-5,600 m depth) in the South Atlantic reveal microplastic concentrations of 1.8-24.7 particles per gram dry sediment. Polyethylene and polypropylene dominate the particle composition.…
Carbon Capture and Utilization in Cement Manufacturing: A Life-Cycle Assessment
We conduct a comprehensive life-cycle assessment of post-combustion carbon capture and mineralization at a representative European cement plant. Results show net CO2 reductions of 68-82% per tonne of cement. The…
Sea Surface Temperature Anomalies and Tropical Cyclone Intensification: 1990-2023
Analysis of 33 years of satellite sea surface temperature data and cyclone track records shows that rapid intensification events have increased 41% in frequency since 2000. Multiple regression identifies SST…
Editorial: Precision Medicine in Oncology — The Road Ahead
This editorial reflects on the transformative decade of precision oncology, from the first FDA approval of imatinib for CML to the current landscape of CAR-T therapies and tumor-agnostic treatments. We…
Gut Microbiome Composition and SSRI Response in Major Depressive Disorder
This randomized controlled trial enrolled 312 patients with major depressive disorder initiating SSRI therapy. Metagenomics analysis at baseline, 8 weeks, and 24 weeks reveals that Lactobacillus rhamnosus abundance at baseline…
Long-term Cardiovascular Outcomes After mRNA Vaccination: A Multicenter Cohort Study
A multicenter prospective cohort study of 284,000 adults aged 18-75 followed over 24 months post-vaccination. We report all-cause cardiovascular event rates stratified by age, sex, and pre-existing conditions. No elevated…
Emergent Reasoning in Large Language Models: A Case Study on STEM Problem Solving
We present a detailed case study examining emergent reasoning capabilities in GPT-4 class models on multi-step STEM problems. Using a novel evaluation framework comprising 2,400 problems across physics, chemistry, and…
Reinforcement Learning from Human Feedback: A Systematic Review
This systematic review examines 147 studies on reinforcement learning from human feedback (RLHF) published between 2017 and 2024. We identify key methodological trends, open challenges in reward modeling, and propose…
Transformer Architecture Scaling Laws for Scientific Text Classification
We investigate scaling laws for transformer-based language models applied to scientific literature classification. Our experiments across 12 benchmark datasets demonstrate that model performance scales predictably with parameter count and training…