Results 11 to 20 of about 2,212,251 (304)

Mechanisms of density dependence in juvenile salmonids: prey depletion, interference competition, or energy expenditure?

open access: yesEcosphere, 2021
Density dependence is a strong regulator of animal populations, operating primarily through intraspecific competition for a limiting resource. Because food is generally limited in natural environments, it is typically assumed that increasing animal ...
Jean‐Michel O. Matte   +2 more
doaj   +1 more source

Valuation of the influence of the basic specific resistance to the movement of freight cars on the energy costs of driving a train [PDF]

open access: yesE3S Web of Conferences, 2023
The primary specific resistance to the movement of freight wagons is a key parameter for normalizing the time and energy consumption of trains. Although the “Rules of Traction Calculations” calls for dividing wagons into six groups when calculating this ...
Masharipov Masud   +5 more
doaj   +1 more source

Nannochloropsis oceanica Cultivation in Pilot-Scale Raceway Ponds—From Design to Cultivation

open access: yesApplied Sciences, 2020
Raceways ponds are the microalgal production systems most commonly used at industrial scale. In this work, two different raceway configurations were tested under the same processing conditions to compare their performance on the production of ...
Pedro Cunha   +8 more
doaj   +1 more source

Determinants of Electrical and Thermal Energy Consumption in Hospitals According to Climate Zones in Poland

open access: yesEnergies, 2021
Energy use in hospitals is higher than in other public buildings, so improving energy efficiency in healthcare buildings is a significant challenge in this sector of engineering.
Małgorzata Cygańska   +1 more
doaj   +1 more source

Interaction analysis of bucket bottom knife with soil to build up subbase

open access: yesВестник СибАДИ, 2020
Introduction. To solve the problem of accelerating the construction of roads, improving their quality, it is advisable to use a continuous action unit to form a underlying layer.
V. A. Nikolaev
doaj   +1 more source

SEPARATION OF MIXTURES By COMBINING RECTIFICATION AND FRACTIONAL CRySTALLIZATION PROCESSES

open access: yesТонкие химические технологии, 2017
Various options of separation of binary mixtures by combining the processes of fractional crystallization and rectification are considered. The base mixture, depending on its composition, can be initially directed to the rectification stage or to one of ...
G. A. Nosov   +2 more
doaj   +1 more source

THE PROBLEM OF ENERGY EFFICIENCY OF THE GEOTHERMAL CIRCULATION SYSTEM IN DIFFERENT MODES OF REINJECTION OF THE COOLANT

open access: yesЮг России: экология, развитие, 2017
Aim. Advanced technologies are crucial for widespread use of geothermal energy to ensure its competitiveness with conventional forms of energy. To date, the basis for the development of geothermal energy is the technology of extracting the heat transfer ...
D. K. Djavatov, A. A. Azizov
doaj   +1 more source

ENERGY COSTS IN DAIRY FARMS – ASSESSMENT IN THE YEARS 2005-2016 [PDF]

open access: yesAnnals of the Polish Association of Agricultural and Agribusiness Economists, 2019
The main aims of the article are: 1) defining the changes of energy costs in farms focused on milk production and further divided according to their economic size in Poland and other selected EU countries between 2005 and 2016; 2) analysis of electricity
Andrzej Parzonko   +2 more
doaj   +1 more source

Thermal Treatment in Milk Processing: Using a Complex Energy-Substitution Equipment during Preliminary Water Heating [PDF]

open access: yesТехника и технология пищевых производств, 2018
Energy input affects the final cost of dairy products. The paper features energy cost optimization in dairy industry and, in particular, in the production of cultured milk foods.
Gerber Y., Gavrilov A., Verbitsky A.
doaj   +1 more source

LED Lighting: A Grower’s Guide to Light Spectra

open access: yesHortScience, 2023
For many growers, established and newcomers, the determination of the optimal light spectrum for growing crops can be challenging and highly dependent on crop species and variety. With the increased popularity of LED lighting, the capability to fine-tune
John D. Stamford   +3 more
doaj   +1 more source

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