Results 21 to 30 of about 2,889,909 (381)

The effects of nonlocal impact ionization on the speed of avalanche photodiodes [PDF]

open access: yes, 2003
The nonlocal enhancement in the velocities of charge carriers to ionization is shown to outweigh the opposing effects of dead space, increasing the avalanche speed of short avalanche photodiodes (APDs) over the predictions of a conventional local model ...
David, J.P.R.   +4 more
core   +1 more source

Design of a GSM 900 Energy Harvesting Model for a Remote-Control Device [PDF]

open access: yesInternational Journal of Electronics and Telecommunications, 2022
This paper deals with designing and simulation of an efficient RF-DC energy harvesting system for a remote control device. GSM down-link frequency of 935MHz to 960MHz and uplink frequency of 890MHz to 915MHz is taken as the RF source with centre ...
Deepak Kumar Nayak, Arjuna Muduli
doaj   +1 more source

Muroid rodent phylogenetics: 900-species tree reveals increasing diversification rates

open access: yesPLoS ONE, 2017
We combined new sequence data for more than 300 muroid rodent species with our previously published sequences for up to five nuclear and one mitochondrial genes to generate the most widely and densely sampled hypothesis of evolutionary relationships ...
Scott J. Steppan, John J. Schenk
semanticscholar   +1 more source

Autocratic opening to democracy: why legitimacy matters [PDF]

open access: yes, 2006
As recent experiments in democratisation around the world show signs of achieving success, or failure, or more usually something in between, the attention of democracy promotion actors in the international community is turning to the world's remaining ...
Burnell, Peter J.
core   +1 more source

Pathological, bacteriological, and molecular characteristics of natural outbreaks of Johne's disease in goats of Fars Province, Iran

open access: yesInternational Journal of Mycobacteriology, 2016
Objective/Background: Johne's disease, also called paratuberculosis, is a very important chronic infectious disease of ruminants worldwide. The causative agent is an acid-fast bacterium, Mycobacterium avium paratuberculosis (MAP).
F Zarei Kordshouli   +2 more
doaj   +1 more source

Venezia ’900: il secolo delle mostre

open access: yesLaboratoire Italien, 2014
For Venice, the 20th century was a century of exhibitions, since the “invention” of the Biennale in 1895. With the development of cultural tourism, art exhibitions have flourished.
Nico Stringa
doaj   +1 more source

NaYF4:Er3+,Yb3+/SiO2 Core/Shell Upconverting Nanocrystals for Luminescence Thermometry up to 900 K

open access: yesThe journal of physical chemistry. C, Nanomaterials and interfaces, 2017
The rapid development of nanomaterials with unique size-tunable properties forms the basis for a variety of new applications, including temperature sensing.
R. Geitenbeek   +5 more
semanticscholar   +1 more source

DEN NYE HISTORIESKRIVNING I 900-TALLET

open access: yesKulturstudier, 2019
Med Liudprand af Cremonas værk Antapodosis blomstrede historieskrivningen op efter en 50-årig stilstandsperiode i det østfrankiske rige. Samtidig skete et skift i den foretrukne historiske genre.
Sigga Engsbro
doaj   +1 more source

900 MHz Miniaturized Rectenna [PDF]

open access: yes2018 IEEE Wireless Power Transfer Conference (WPTC), 2018
This paper addresses the design and the characterization of a new topology of compact rectenna used for electromagnetic energy harvesting of low incident electromagnetic power densities. The rectenna uses a broadband miniaturized flat dipole antenna with a single diode rectifier.
Okba, Abderrahim   +2 more
openaire   +3 more sources

Constraints on the FRB rate at 700-900 MHz [PDF]

open access: yes, 2016
Estimating the all-sky rate of fast radio bursts (FRBs) has been dicult due to smallnumber statistics and the fact that they are seen by disparate surveys in dierent regions of the sky. In this paper we provide limits for the FRB rate at 800 MHz based on
L. Connor   +7 more
semanticscholar   +1 more source

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