Results 41 to 50 of about 19,971 (265)

Caustics Formation by a Spherical Reflector – Geometric and Wave Field Analysis with Applications in Room Acoustics and Radio Astronomy

Engineering Transactions
Based on the principles of geometrical optics, an analytical description of caustics generated in a spherical mirror is presented. The formation of caustics in a wave field is studied using acoustic and electromagnetic waves as an example.
Andrzej Kulowski
doaj   +1 more source

Integumentary dormancy of baobab seeds: Chemical scarification/Dormência tegumentar de sementes de baobá: Escarificação química

Diversitas Journal, 2020
The baobab is a tree of multipurpose and biological properties; being its roots, tubers, twigs, fruits, seeds, leaves and edible flowers and used as common ingredients in traditional dishes in Africa.
Ariana Veras de Araújo, Monalisa Alves Diniz da Silva, André Pereira Freire Ferra, Ana Carla Vieira de Brito   +3 more
doaj   +1 more source

The Role of Chemotherapy in Pediatric Myoepithelial Carcinoma: A Systematic Review of the Literature

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Myoepithelial carcinoma (MEC) in pediatric patients is a rare and aggressive malignancy characterized by heterogeneous morphology and variable molecular features. The optimal role of chemotherapy remains unclear. We conducted a systematic review according to PRISMA 2020 guidelines to evaluate chemotherapy in pediatric and young‐adult patients ...
Marco Salvi, Maria Carmen Affinita, Giulia Fichera, Luisa Santoro, Angela Scagnellato, Calogero Virgone, Elena Poli, Gianni Bisogno   +7 more
wiley   +1 more source

Synthesis and Characterization of Fly Ash-Based Geopolymers Activated with Spent Caustic

Gels, 2022
The spent caustic with strong alkali first replaced the alkali activator to prepare the geopolymer. The influence of spent caustic to the geopolymer was characterized through compressive strength measurement, XRD, MIP analysis and NMR, and the ...
Ruobing Zhang, Qian Wan, Yimin Zhang, Xuemian Zhang   +3 more
doaj   +1 more source

Acute Neurological Events in Children With Hemoglobin SC Disease: A Multicenter Retrospective Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Neurological manifestations in children with hemoglobin SC (HbSC) disease remain insufficiently characterized, particularly regarding acute events. The aim of this study was to describe the spectrum and frequency of acute neurological events in a multicenter cohort of children with HbSC disease.
Célia Paulmin, Bérengère Koehl, Audrey Maudoux, Hanine Mansour, Marie‐Hélène Odievre, Nathalie Garrec, Emilie Georget, Cécile Arnaud, Slimane Allali, Lydia Doumdo, Marie Belloy, Corinne Guitton   +11 more
wiley   +1 more source

THE NONLINEAR CAUSTIC

Tamkang Journal of Mathematics, 1991
In this paper the boundary layer at the nonlinear caustic is discussed and a nonlinear Airy equation is,obtained by adapting techniques from linear theory. It is shown that the incident beam undergoes a phase shift by an amount of $\pi/2$ as it passes through the caustic and becomes the outgoing beam.
openaire   +3 more sources

Secretory Phospholipase A2 in Patients With Sickle Cell Disease Hospitalized for Vaso‐Occlusive Pain Episodes

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Secretory phospholipase A2 (sPLA2) is an inflammatory mediator linked to acute chest syndrome (ACS) in sickle cell disease (SCD), a serious complication that can develop during an acute vaso‐occlusive pain episode (VOE). Plasma sPLA2 levels have been proposed as a potential biomarker for predicting ACS onset.
Rawan Korman, Maria Yasmine, Dunia Hatabah, Noor Alzraikat, Frank Harris, Lou Ann Brown, Satheesh Chonat, Nitya Bakshi, Chris A. Rees, Carlton Dampier, Claudia R. Morris   +10 more
wiley   +1 more source

Caustic oesophageal stricture treated by instrumental dilatation: A review of 6 years of practice at the pediatric university hospital charles de gaulle of Ouagadougou

African Journal of Paediatric Surgery, 2023
Background: Oesophageal stricture is one of the most important and redoubtable complications following caustic ingestions in children. Instrumental dilatation is usually considered the first line of treatment.
Ouedraogo Somkieta Francis Modeste, K Thiombiano, J J Damba, A Ouedraogo, P N Doulkom, I Ouedraogo, A Wandaogo   +6 more
doaj   +1 more source

Active caustics

Physical Review Fluids
Inertial particles (IPs) in vortical fluid flow cluster strongly, forming singular structures termed caustics for their resemblance to focal surfaces in optics. Here we show that such extreme aggregation onto low-dimensional submanifolds can arise without mechanical inertia for self-propelled particles (SPPs), through a formal correspondence between ...
Rahul Chajwa, C. Rajarshi, Rama Govindarajan, Sriram Ramaswamy   +3 more
openaire   +2 more sources

A Bibliometric Analysis of Publications in Uremic Toxins From 1991 to 2024

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Uremic toxins are a growing area of research in nephrology, with significant implications in the progression and treatment of chronic kidney disease (CKD) and the management of end‐stage kidney disease (ESKD). This bibliometric analysis aims to evaluate the global research trends, key contributors, and the impact of publications in ...
Yuh‐Shan Ho, Karim M. Soliman, Wisit Cheungpasitporn, Wannasit Wathanavasin, Ahmed Daoud, Ahmed I. Kamal, Balázs Szamosfalvi, Tibor Fülöp   +7 more
wiley   +1 more source