Results 21 to 30 of about 3,049,647 (303)

Evaluation of net anthropogenic nitrogen inputs in the Three Gorges Reservoir Area

open access: yesEcological Indicators, 2022
Excessive nitrogen input caused by human activities is an important factor threatening regional water security and economic development. In this study, net anthropogenic nitrogen input has offered an advantage in evaluating nitrogen input’s temporal and ...
Zhen Wang   +5 more
doaj   +1 more source

Model $I$--$V$ curves and figures of merit of underdamped deterministic Josephson ratchets

open access: yes, 2016
We propose simple models for the current-voltage characteristics of typical Josephson ratchets. We consider the case of a ratchet working against a constant applied counter force and derive analytical expressions for the key characteristics of such a ...
Goldobin, E.   +3 more
core   +1 more source

Multiband Asymmetric Biconical Dipole Antenna with Distributed Surface Impedance and Arbitrary Excitation

open access: yesEast European Journal of Physics
A numerical-analytical solution of a problem concerning the current distribution and input characteristics of asymmetric biconical dipole with distributed surface impedance and arbitrary excitation and derived in the thin-wire approximation.
Mikhail V. Nesterenko   +2 more
doaj   +1 more source

Modified Two-Channel LLC Resonant Converter With Optimal Efficiency for Wide Input Voltage Applications

open access: yesIEEE Access, 2023
A modified two-channel LLC resonant converter with optimal efficiency for wide input voltage applications. The converter has the same voltage gain and power handing ability as conventional full-bridge (FB) resonant converter, but the hardware cost is ...
Linlin Pi
doaj   +1 more source

TOPYDE: A Tool for Physical Database Design [PDF]

open access: yes, 1995
We describe a tool for physical database design based on a combination of theoretical and pragmatic approaches. The tool takes as input a relational schema, the workload defined on the schema, and some additional database characteristics and produces as ...
Blanken, H.M.   +3 more
core   +3 more sources

Input Characteristics of Electrically Thin Dipole with Variable Radius Along Antenna Length

open access: yesEast European Journal of Physics
An approximate analytical solution to the problem of radiation (diffraction) of electromagnetic waves by dipole (monopole) with variable radius along antenna length is presented.
Mikhail V. Nesterenko   +2 more
doaj   +1 more source

Radiation of Electromagnetic Waves by Regular and Biconical Dipoles with Variable Distributed Surface Impedance and Arbitrary Excitation

open access: yesEast European Journal of Physics
An approximate analytical solution of a problem concerning the radiation of electromagnetic waves by regular and biconical dipoles with constant and variable complex distributed surface impedance and arbitrary excitation is derived.
Mikhail V. Nesterenko   +3 more
doaj   +1 more source

Role of H2O2 on photosynthetic characteristics of soybean genotypes under low water input

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2020
Soybean is subjected to abiotic stresses that immensely affect its productivity during its lifespan and threaten food security globally. Recent research recommends that chemical substances could be applied to plants as an alternative to traditional ...
Neslihan Saruhan Güler, Necla Pehlivan
doaj   +1 more source

Characteristics of Dissolved Organic Matter in a Semi-closed Bay in Summer: Insights from Stable Isotope and Optical Analyses

open access: yesFrontiers in Marine Science, 2022
Dissolved organic matter (DOM) serves as the most active and sensitive organic component in the bay, and its biogeochemical characteristics and reactivity are affected by the properties of terrestrial and marine substances significantly.
Yafeng Zhong   +7 more
doaj   +1 more source

Projection-Specific Characteristics of Retinal Input to the Brain [PDF]

open access: yesThe Journal of Neuroscience, 2015
The brain receives information about the direction of object motion from several types of retinal ganglion cells (RGCs). On-Off direction-selective (DS) RGCs respond preferentially to stimuli moving quickly in one of four directions and provide a significant (but difficult to quantify) fraction of RGC input to the SC. On DS RGCs, in comparison, respond
Gregory, Gauvain, Gabe J, Murphy
openaire   +2 more sources

Home - About - Disclaimer - Privacy