16 research outputs found
Major River Basins Have Enough Water to Sustainably Double Food Production in the Coming Decades
As Principais Bacias Fluviais Possuem Agua Suficiente para Duplicar a Porducao Alimentar de Forma Sustenavel nas Proximas Decadas
New Push to Integrate Global Water Policies Would Divert Energy and Agriculture from Collision Course
Principales cuencas del mundo tienen agua suficiente para duplicar produccion sostenible de alimentos durante las siguientes decadas
Climate Change in Africa’s Major River Basins Could Impede Continent’s Farm Transformation Efforts, Increase Cross-Border Water Conflict
Un nouvel élan pour intégrer les politiques globales de l’eau pourrait guider l’énergie et l’agriculture vers la sortie de l’impasse
Les grands bassins fluviaux ont assez d'eau pour soutenir le doublement durable de la production alimentaire au cours des prochaines decennies
Center for Community and Regional Research Report
Supported by the Center for Community and Regional Research, University of Minnesota, Duluth, through a grant from the Center for Urban and Regional Affair
Concurrent Subcutaneous Panniculitis-like T-Cell Lymphoma and B-Cell Acute Lymphoblastic Leukemia in 2 Pediatric Patients
Subcutaneous panniculitis-like T-cell lymphoma is a cutaneous lymphoma characterized by CD8+ T-cell infiltrate in the subcutis that is rare in children. Acute lymphoblastic lymphoma is the most common pediatric malignancy and often presents with fevers and pancytopenia. Herein, we report 2 pediatric patients presenting with subcutaneous panniculitis-like T-cell lymphoma and B-cell acute lymphoblastic lymphoma, distinct hematologic malignancies arising from different lymphoid lineages, with no identifiable germline cancer predisposition
Photonic ADC: overcoming the bottleneck of electronic jitter
Accurate conversion of wideband multi-GHz analog signals into the digital domain has long been a target of analog-to-digital converter (ADC) developers, driven by applications in radar systems, software radio, medical imaging, and communication systems. Aperture jitter has been a major bottleneck on the way towards higher speeds and better accuracy. Photonic ADCs, which perform sampling using ultra-stable optical pulse trains generated by mode-locked lasers, have been investigated for many years as a promising approach to overcome the jitter problem and bring ADC performance to new levels. This work demonstrates that the photonic approach can deliver on its promise by digitizing a 41 GHz signal with 7.0 effective bits using a photonic ADC built from discrete components. This accuracy corresponds to a timing jitter of 15 fs - a 4-5 times improvement over the performance of the best electronic ADCs which exist today. On the way towards an integrated photonic ADC, a silicon photonic chip with core photonic components was fabricated and used to digitize a 10 GHz signal with 3.5 effective bits. In these experiments, two wavelength channels were implemented, providing the overall sampling rate of 2.1 GSa/s. To show that photonic ADCs with larger channel counts are possible, a dual 20-channel silicon filter bank has been demonstrated