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Ileocolic Enteroenteric Fistula in Small Bowel Obstruction With Cecum Perforation in the Pediatric Age Group: A Case Report of a Rare Complication.
Cureus
December 2024
Department of General Surgery, Uttar Pradesh University of Medical Sciences, Saifai, IND.
Enteroenteric fistula in the pediatric age group is an unusual presentation. It can create a diagnostic dilemma for the physician, particularly in the absence of any previous surgery, prolonged abdominal symptoms, or inflammatory bowel disease. The patient is a 10-year-old girl who presented with mild-grade fever, abdominal distension, scanty stool passage, and foul-smelling vomiting for the past 10 days.
View Article and Find Full Text PDFWafer-scale monolayer MoS film integration for stable, efficient perovskite solar cells.
Science
January 2025
Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, School of Materials Science and Engineering, Peking University, Beijing, China.
One of the primary challenges in commercializing perovskite solar cells (PSCs) is achieving both high power conversion efficiency (PCE) and sufficient stability. We integrate wafer-scale continuous monolayer MoS buffers at the top and bottom of a perovskite layer through a transfer process. These films physically block ion migration of perovskite into carrier transport layers and chemically stabilize the formamidinium lead iodide phase through strong coordination interaction.
View Article and Find Full Text PDFSolution-processable ordered defect compound semiconductors for high-performance electronics.
Sci Adv
October 2024
Department of Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA.
Solution-processable semiconductors hold promise in enabling applications requiring cost-effective electronics at scale but suffer from low performance limited by defects. We show that ordered defect compound semiconductor CuInSe, which forms regular defect complexes with defect-pair compensation, can simultaneously achieve high performance and solution processability. CuInSe transistors exhibit defect-tolerant, band-like transport supplying an output current above 35 microamperes per micrometer, with a large on/off ratio greater than 10, a small subthreshold swing of 189 ± 21 millivolts per decade, and a high field-effect mobility of 58 ± 10 square centimeters per volt per second, with excellent uniformity and stability, superior to devices built on its less defective parent compound CuInSe, analogous binary compound InSe, and other solution-deposited semiconductors.
View Article and Find Full Text PDFStudy of Global Navigation Satellite System Receivers' Accuracy for Unmanned Vehicles.
Sensors (Basel)
September 2024
Faculty of Telecommunication, Technical University of Sofia, 1000 Sofia, Bulgaria.
The development of unmanned ground vehicles and unmanned aerial vehicles requires high-precision navigation due to the autonomous motion and higher traffic intensity. The existing L1 band GNSS receivers are a good and cheap decision for smartphones, vehicle navigation, fleet management systems, etc., but their accuracy is not good enough for many civilian purposes.
View Article and Find Full Text PDFStealthy and hyperuniform isotropic photonic band gap structure in 3D.
PNAS Nexus
September 2024
Advanced Technology Institute and School of Mathematics and Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom.
In photonic crystals, the propagation of light is governed by their photonic band structure, an ensemble of propagating states grouped into bands, separated by photonic band gaps. Due to discrete symmetries in spatially strictly periodic dielectric structures their photonic band structure is intrinsically anisotropic. However, for many applications, such as manufacturing artificial structural color materials or developing photonic computing devices, but also for the fundamental understanding of light-matter interactions, it is of major interest to seek materials with long range nonperiodic dielectric structures which allow the formation of photonic band gaps.
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