scholarly journals Design strategies of an unobscured three mirror telescope with freeform surfaces for infrared nanosatellite imagery

2021 ◽  
Author(s):  
Louis Duveau ◽  
Thierry Lépine ◽  
Emmanuel Hugot ◽  
Xavier Briottet ◽  
Guillaume Druart
Keyword(s):  
Design Strategies ◽  
Freeform Surfaces ◽  
Mirror Telescope

Design of two-mirror telescope systems with freeform surfaces: modified configurations and analysis

2021 ◽  
Vol 7 (01) ◽  
Author(s):  
Budhiraju Vishweshwar Rao ◽  
Kuppuswamy Venkatesan Sriram ◽  
Chittur Subramanian Narayanamurthy
Keyword(s):  
Freeform Surfaces ◽  
Mirror Telescope

Design of an anastigmatic three-mirror telescope using freeform surfaces

2020 ◽  
Author(s):  
Jorge de Jesús Alvarado-Martínez ◽  
Fermín Salomón Granados-Agustín ◽  
Sergio Vázquez y Montiel ◽  
Alejandro Cornejo-Rodríguez
Keyword(s):  
Freeform Surfaces ◽  
Mirror Telescope

Investigation of the Deformation of Mirror Telescope Surface under Symmetric Location of Controlled Supporting Rods

1999 ◽  
Vol 31 (7-9) ◽  
pp. 22-27
Author(s):  
Yuriy P. Ladikov-Roev ◽  
Victor I. Panchuk ◽  
Georgiy A. Cheshko ◽  
Ludmila I. Samoilenko
Keyword(s):  
Mirror Telescope

Towards a Design of Active Oxygen Evolution Catalysts: Insights from Automated Density Functional Theory Calculations and Machine Learning

2019 ◽  
Author(s):  
Seoin Back ◽  
Kevin Tran ◽  
Zachary Ulissi
Keyword(s):  
Machine Learning ◽  
Oxygen Evolution ◽  
Active Sites ◽  
Density Functional ◽  
Chemical Space ◽  
Density Functional Theory Calculations ◽  
Catalyst Design ◽  
Transition Metal Catalysts ◽  
Oxide Materials ◽  
Design Strategies

<div> <div> <div> <div><p>Developing active and stable oxygen evolution catalysts is a key to enabling various future energy technologies and the state-of-the-art catalyst is Ir-containing oxide materials. Understanding oxygen chemistry on oxide materials is significantly more complicated than studying transition metal catalysts for two reasons: the most stable surface coverage under reaction conditions is extremely important but difficult to understand without many detailed calculations, and there are many possible active sites and configurations on O* or OH* covered surfaces. We have developed an automated and high-throughput approach to solve this problem and predict OER overpotentials for arbitrary oxide surfaces. We demonstrate this for a number of previously-unstudied IrO2 and IrO3 polymorphs and their facets. We discovered that low index surfaces of IrO2 other than rutile (110) are more active than the most stable rutile (110), and we identified promising active sites of IrO2 and IrO3 that outperform rutile (110) by 0.2 V in theoretical overpotential. Based on findings from DFT calculations, we pro- vide catalyst design strategies to improve catalytic activity of Ir based catalysts and demonstrate a machine learning model capable of predicting surface coverages and site activity. This work highlights the importance of investigating unexplored chemical space to design promising catalysts.<br></p></div></div></div></div><div><div><div> </div> </div> </div>

The Dynamics of Daylighting at a Residential College Building with the Internal Courtyard Arrangement

2015 ◽  
Vol 9 (3) ◽  
pp. 148
Author(s):  
Adi Ainurzaman Jamaludin ◽  
Hazreena Hussein ◽  
Nila Keumala ◽  
Ati Rosemary Mohd Ariffin
Keyword(s):  
Field Measurement ◽  
Mean Value ◽  
Design Strategies ◽  
Residential College ◽  
Bioclimatic Design ◽  
Living Space ◽  
Entrance Door ◽  
Wall Openings

Dayasari residential college building was designed with the internal courtyard that allows for numerous implementations of bioclimatic design strategies, especially on daylighting. The field measurement was conducted at eight unoccupied student rooms, selected as samples to represent ten scenarios and orientations that concerned with the level of radiation and penetration of sunlight. This study reveals the contribution of the internal courtyard in the residential college which allows the daylight penetration at the corridor areas and interior of the rooms through the transom over the entrance door, up to ten hours daily. Different amounts of daylight were measured in specific room scenarios to suggest on the most comfortable indoor living space. The recorded mean value for indoor varied from 37 to 286 lux, while in the corridor area 192 to 3,848 lux. However, the use of the large overhangs over the windows, wall openings in the room and trees with large canopy in the landscape setting should critically justify when the adequacy of daylight was drastically reduced in certain rooms.    

Fungal Phytotoxins in Sustainable Weed Management

2018 ◽  
Vol 25 (2) ◽  
pp. 268-286 ◽  
Author(s):  
Maurizio Vurro ◽  
Angela Boari ◽  
Francesca Casella ◽  
Maria Chiara Zonno
Keyword(s):  
Weed Management ◽  
Pathogenic Fungi ◽  
Mechanisms Of Action ◽  
Limiting Factors ◽  
Integrated Weed Management ◽  
Plant Pathogenic Fungi ◽  
Design Strategies ◽  
Disease Etiology ◽  
Chemical Structures ◽  
Toxic Metabolites

Fungal phytotoxins are natural secondary metabolites produced by plant pathogenic fungi during host–pathogen interactions. They have received considerable particular attention for elucidating disease etiology, and consequently to design strategies for disease control. Due to wide differences in their chemical structures, these toxic metabolites have different ecological and environmental roles and mechanisms of action. This review aims at summarizing the studies on the possible use of these metabolites as tools in biological and integrated weed management, e.g. as: novel and environmentally friendly herbicides; lead for novel compounds; sources of novel mechanisms of action. Moreover, the limiting factors for utilizing those metabolites in practice will also be briefly discussed.

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