Results 61 to 70 of about 280,648 (303)

A Sensorless Inverse Optimal Control Plus Integral Action to Regulate the Output Voltage in a Boost Converter Supplying an Unknown DC Load

IEEE Access, 2023
This study utilizes inverse optimal control (IOC) theory to address the issue of output voltage regulation in a boost converter feeding an unknown direct current (DC) load.
Oscar Danilo Montoya, Walter Gil-Gonzalez, Sebastian Riffo, Carlos Restrepo, Catalina Gonzalez-Castano   +4 more
doaj   +1 more source

Nitrogen Isotopic Fractionation in Interstellar Ammonia [PDF]

, 2010
Using the Green Bank Telescope (GBT), we have obtained accurate measurements of the $^{14}$N/$^{15}$N isotopic ratio in ammonia in two nearby cold, dense molecular clouds, Barnard~1 and NGC 1333. The $^{14}$N/$^{15}$N ratio in Barnard~1, $334 \pm 50$ (3$\
Abbas, Bachiller, Bockelée-Morvan, Owen, Rodgers, Rodgers, Umemoto, Wielen   +7 more
core   +4 more sources

Auto‐Generated Valence States in Electrocatalysts for Boosting Oxygen and Hydrogen Evolution Kinetics in Alkaline Water/Alkaline Seawater/Simulated Seawater/Natural Seawater

Advanced Functional Materials, EarlyView.
This review systematically highlights the latest achievements in mixed‐valence states relevant to hydrogen and oxygen evolution reactions, providing essential insights into future directions and methods for large‐scale practical implementation. This critical review is expected to provide an overview of recent advancements in diverse valence‐state metal
Jitendra N. Tiwari, Gokul Bhaskaran, Krishan Kumar, Yun Suk Huh, Young‐Kyu Han   +4 more
wiley   +1 more source

Farmers’ attitude towards green ammonia produced by upcycling waste nitrogen: Empirical evidence from an Iowa study

Sustainable Futures
This study examines farmers' acceptance of green ammonia produced by upcycling waste nitrogen using renewable energy. A mail survey, targeting a random sample of crop growers in Iowa, USA, found moderately high acceptance: about 50 % support green ...
Yu Wang, Wenzhen Li, Shuang Gu
doaj   +1 more source

Comparison and Application Prospects of Ammonia and Methanol Technologies Supporting Large-Scale Development of Green Hydrogen Energy

南方能源建设, 2023
[Introduction] Difficulties in storage and transportation impose restrictions on the large-scale development and utilization of hydrogen energy, so it is necessary to find a solution for large-scale hydrogen storage and long-distance transportation at a ...
Kexin ZHENG, Xiaotian GAO, Yongchun FAN, Zhibin LUO, Zhen LI, Yun ZHENG, Yun LIU   +6 more
doaj   +1 more source

Physical properties of high-mass clumps in different stages of evolution [PDF]

, 2013
(Abridged) Aims. To investigate the first stages of the process of high-mass star formation, we selected a sample of massive clumps previously observed with the SEST at 1.2 mm and with the ATNF ATCA at 1.3 cm.
Beltran, M. T., Brand, J., Cesaroni, R., Dodson, R., Fontani, F., Giannetti, A., Molinari, S., Rioja, M. J., Sanchez-Monge, A.   +8 more
core   +1 more source

Process challenges of green ammonia production

Nature Synthesis, 2023
Ammonia synthesis is one of the most important chemical processes as it sustains global food production, but it is a highly polluting and energy-intensive process. Here, the challenges of decarbonizing the process to synthesize green ammonia are discussed.
Torrente-Murciano, Laura, Smith, Collin
openaire   +2 more sources

Formation of Stable Amorphous Calcium Phosphate and Collagen Assemblies by a Versatile Spray‐Drying Approach

Advanced Functional Materials, EarlyView.
Amorphous calcium phosphate (ACP) microparticles with long‐term and thermal stability are prepared with or without collagen using a scalable one‐pot spray‐drying process. Under simulated physiological conditions, they crystallize into biomimetic bone mineral and, when combined with collagen, form extrudable, fibrillar bone‐like 3D constructs.
Camila Bussola Tovani, Nessma Bennaceur, Celina Benkhellat, Tristan Georges, Clara Doisneau, Vaskar Sardhalia, Thierry Azaïs, Flora Lemaire, Halima Kerdjoudj, Mohamed Selmane, Capucine Sassoye, Marie Albéric, Cédric Boissière, Nadine Nassif   +13 more
wiley   +1 more source

Technical Feasibility Analysis of Green Energy Storage Options and Hornsea Wind Farms

Energies
The global transition towards clean energy sources is becoming essential to reduce reliance on conventional fuels and mitigate carbon emissions. In the future, the clean energy storage landscape, green hydrogen, and green ammonia (powered by renewable ...
Muhammad Anas Maqbool, Md Jahir Rizvi, Yeaw Chu Lee, Pablo Borja Rosales   +3 more
doaj   +1 more source

Nitrogen and sulphur management: challenges for organic sources in temperate agricultural systems [PDF]

, 2005
A current global trend towards intensification or specialization of agricultural enterprises has been accompanied by increasing public awareness of associated environmental consequences. Air and water pollution from losses of nutrients, such as nitrogen (
Aaes O, Arah JRM, Badaruddin M, Baggs EM, Banwart WL, Beard WE, Beck DP, Beckwith CP, Bergstrom L, Bergstrom LF, Bergstrom LF, Boller BC, Chambers BJ, Chao TT, Cowell LE, Curtin D, Eriksen J, Eriksen J, Eriksen J, Eriksen J, Freney JR, Giller KE, Granstedt A, Greaves J, Handayanto E, Harward ME, Hauck RD, Haynes RJ, Heger J, Hilhorst GJ, Huijsmans JFM, Huijsmans JFM, Janzen HH, Jarvis SC, Jenkinson DS, Jensen ES, Kemppainen E, Kirchmann H, Kirchmann H, Knights JS, Kumar K, Lloyd A, Lord EI, Lorenz F, Martinez J, Meisinger JJ, Menzi H, Metson AJ, Myers RJK, Myers RJK, National Research Council, Nygaard Serensen J, Pain BF, Papastylianou I, Papastylianou I, Parton WJ, Ruz-Jerez BE, Schuiling RD, Shepherd MA, Shepherd MA, Smith KA, Sommer SG, Steineck S, Stockdale EA, Tabatabai MA, Thomsen IK, Webster CP, Weier KL, Whitehead DC   +68 more
core   +1 more source