Results 21 to 30 of about 36,998 (231)

Flow boiling in a 1.1mm tube with R134a: Experimental results and comparison with model [PDF]

open access: yes, 2007
A detailed comparison of the three-zone evaporation model, proposed by Thome et al. (2004), with experimental heat transfer results of two stainless steel tubes of internal diameter 4.26 mm and 2.01 mm using R134a fluid was presented by Shiferaw et al ...
Karayiannis, TG   +2 more
core   +1 more source

PROPUESTA DE UN SISTEMA NEURO-DBR Y SU APLICACIÓN EN LA PREDICCIÓN DE LA SERIE DE TIEMPO DE LORENZ

open access: yesCiencia e Ingeniería Neogranadina, 2010
Este artículo propone la predicción de la serie de tiempo Lorenz usando un nuevo método conocido como sistema Neuro-DBR y su comparación, con un diseño Neurodifuso convencional.
Lina Morales Laguado   +2 more
doaj   +3 more sources

Optical engineering of PbS colloidal quantum dot solar cells via Fabry–Perot resonance and distributed Bragg reflectors

open access: yesNano Convergence, 2023
A tradeoff between light absorption and charge transport is a well-known issue in PbS colloidal quantum dot (CQD) solar cells because the carrier diffusion length in PbS CQD films is comparable to the thickness of CQD film. We reduce the tradeoff between
Sumin Bae   +3 more
doaj   +1 more source

Dynamic modal analysis of monolithic mode-locked semiconductor lasers [PDF]

open access: yes, 2003
We analyze the advantages and applicability limits of the mode-coupling approach to active, passive, hybrid, and harmonic mode-locking in diode lasers. A simple, computationally efficient numerical model is proposed and applied to several traditional and
Arnold, J.M.   +2 more
core   +1 more source

A stateless opportunistic routing protocol for underwater sensor networks [PDF]

open access: yes, 2018
Routing packets in Underwater Sensor Networks (UWSNs) face different challenges, the most notable of which is perhaps how to deal with void communication areas.
Boutaleb, Tuleen   +2 more
core   +1 more source

Void Hole Avoidance for Reliable Data Delivery in IoT Enabled Underwater Wireless Sensor Networks

open access: yesSensors, 2018
Due to the limited availability of battery power of the acoustic node, an efficient utilization is desired. Additionally, the aquatic environment is harsh; therefore, the battery cannot be replaced, which leaves the network prone to sudden failures. Thus,
Arshad Sher   +5 more
doaj   +1 more source

Dragon blood resin ameliorates steroid-induced osteonecrosis of femoral head through osteoclastic pathways

open access: yesFrontiers in Cell and Developmental Biology, 2023
Objective: Dragon’s Blood resin (DBR) is a traditional medicinal substance renowned for its diverse pharmacological effects, which consists of potent anti-inflammatory, antioxidant and angiogenic properties.
Yuhao Liu   +10 more
doaj   +1 more source

Effect of Dielectric Distributed Bragg Reflector on Electrical and Optical Properties of GaN-Based Flip-Chip Light-Emitting Diodes

open access: yesMicromachines, 2018
We demonstrated two types of GaN-based flip-chip light-emitting diodes (FCLEDs) with distributed Bragg reflector (DBR) and without DBR to investigate the effect of dielectric TiO2/SiO2 DBR on optical and electrical characteristics of FCLEDs.
Shengjun Zhou   +6 more
doaj   +1 more source

InGaN Resonant-Cavity Light-Emitting Diodes with Porous and Dielectric Reflectors

open access: yesApplied Sciences, 2020
InGaN based resonant-cavity light-emitting diode (RC-LED) structures with an embedded porous-GaN/n-GaN distributed Bragg reflector (DBR) and a top dielectric Ta2O5/SiO2 DBR were demonstrated.
Cheng-Jie Wang   +6 more
doaj   +1 more source

Die Blackbox ausleuchten. Potenziale von Design-Based Research für Phasen der Lehrerinnen- und Lehrerprofessionalisierung

open access: yesBeiträge zur Lehrerinnen- und Lehrerbildung, 2020
Design-Based Research (DBR) wird als Forschungsstil in den letzten Jahren auch im deutschsprachigen Raum verstärkt genutzt. DBR meint die Arbeit mit einem doppelten Erkenntnisinteresse: das Entwickeln von Unterrichtsdesigns für die unterrichtliche ...
Isolde Malmberg
doaj   +1 more source

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