Design of the front window of full-disc vector magnetograph

2019 ◽  
Author(s):  
Jianfeng Yang ◽  
Fu Li ◽  
Guoqing Chen ◽  
Juan Lv ◽  
Zhizhou Lu ◽  
...  
Keyword(s):  
Front Window

scholarly journals Fast Timing for High-Rate Environments with Micromegas

2018 ◽  
Vol 174 ◽  
pp. 02002 ◽  
Author(s):  
Thomas Papaevangelou ◽  
Daniel Desforge ◽  
Esther Ferrer-Ribas ◽  
Ioannis Giomataris ◽  
Cyprien Godinot ◽  
...  
Keyword(s):  
Charged Particle ◽  
High Rate ◽  
Time Of Arrival ◽  
Electromagnetic Showers ◽  
Fast Timing ◽  
Timing Resolution ◽  
Current State ◽  
Sustained Performance ◽  
Front Window ◽  
Uv Photons

The current state of the art in fast timing resolution for existing experiments is of the order of 100 ps on the time of arrival of both charged particles and electromagnetic showers. Current R&D on charged particle timing is approaching the level of 10 ps but is not primarily directed at sustained performance at high rates and under high radiation (as would be needed for HL-LHC pileup mitigation). We demonstrate aMicromegas based solution to reach this level of performance. The Micromegas acts as a photomultiplier coupled to a Cerenkovradiator front window, which produces sufficient UV photons to convert the ∼100 ps single-photoelectron jitter into a timing response of the order of 10-20 ps per incident charged particle. A prototype has been built in order to demonstrate this performance. The first laboratory tests with a pico-second laser have shown a time resolution of the order of 27 ps for ∼50 primary photoelectrons, using a bulk Micromegas readout.

scholarly journals SYNTHETIC VISION SYSTEM CALIBRATION FOR CONFORM PROJECTION ON THE PILOT’S HEAD-UP DISPLAY

2020 ◽  
Vol XLIII-B2-2020 ◽  
pp. 575-581
Author(s):  
S. Danilov ◽  
M. Kozyrev ◽  
M. Grechanichenko ◽  
L. Grodzitskiy ◽  
V. Mizginov ◽  
...  
Keyword(s):  
Situational Awareness ◽  
Vision System ◽  
Digital Terrain Model ◽  
3D Models ◽  
Sensor Data ◽  
Training Dataset ◽  
Learning Approaches ◽  
Terrain Model ◽  
Front Window ◽  
Calibration Algorithm

Abstract. Situational awareness of the crew is critical for the safety of the air flight. Head-up display allows providing all required flight information in front of the pilot over the cockpit view visible through the cockpit’s front window. This device has been created for solving the problem of informational overload during piloting of an aircraft. While computer graphics such as scales and digital terrain model can be easily presented on the such display, errors in the Head-up display alignment for correct presenting of sensor data pose challenges. The main problem arises from the parallax between the pilot’s eyes and the position of the camera. This paper is focused on the development of an online calibration algorithm for conform projection of the 3D terrain and runway models on the pilot’s head-up display. The aim of our algorithm is to align the objects visible through the cockpit glass with their projections on the Head-up display. To improve the projection accuracy, we use an additional optical sensor installed on the aircraft. We combine classical photogrammetric techniques with modern deep learning approaches. Specifically, we use an object detection neural network model to find the runway area and align runway projection with its actual location. Secondly, we re-project the sensor’s image onto the 3D model of the terrain to eliminate errors caused by the parallax. We developed an environment simulator to evaluate our algorithm. Using the simulator we prepared a large training dataset. The dataset includes 2000 images of video sequences representing aircraft’s motion during takeoff, landing and taxi. The results of the evaluation are encouraging and demonstrate both qualitatively and quantitatively that the proposed algorithm is capable of precise alignment of the 3D models projected on a Head-up display.

Self-normalized inverse photopyroelectric technique with viscous front window for thermal effusivity measurements in liquids

2017 ◽  
Vol 655 ◽  
pp. 124-128 ◽  
Author(s):  
Rumen Ivanov ◽  
Ernesto Marin ◽  
Jesús Villa ◽  
Daniel Alaniz ◽  
Ernesto Olvera
Keyword(s):  
Thermal Effusivity ◽  
Photopyroelectric Technique ◽  
Front Window

scholarly journals TiO2-coated window for facilitated gas evolution in PEC solar water splitting

RSC Advances ◽  
2017 ◽  
Vol 7 (47) ◽  
pp. 29665-29671 ◽  
Author(s):  
Sérgio Miranda ◽  
António Vilanova ◽  
Tânia Lopes ◽  
Adélio Mendes
Keyword(s):  
Water Splitting ◽  
Gas Bubbles ◽  
Gas Evolution ◽  
Evolved Gas ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Front Window ◽  
Pec Cells

TiO2 films were prepared for facilitating the evolved gas bubbles to slip over the front window of PEC cells resulting in a transparency improvement of up to 10%.

Revisiting the role of doxorubicin in the treatment of rhabdomyosarcoma: An up-front window study in newly diagnosed children with high-risk metastatic disease

2008 ◽  
Vol 44 (3) ◽  
pp. 427-431 ◽  
Author(s):  
Christophe Bergeron ◽  
Philippe Thiesse ◽  
Annie Rey ◽  
Daniel Orbach ◽  
Patrick Boutard ◽  
...  
Keyword(s):  
High Risk ◽  
Metastatic Disease ◽  
Newly Diagnosed ◽  
Front Window

scholarly journals Trifling with Holy Time: Women and the Formation of the Calvinist Church of Worcester, Massachusetts, 1815-1820

1998 ◽  
Vol 8 (1) ◽  
pp. 117-144
Author(s):  
Carolyn J. Lawes
Keyword(s):  
Social Position ◽  
The People ◽  
Front Window ◽  
Drawing Room ◽  
At Home

It was half past nine on a quiet Monday night in April 1818. Elizabeth Tuckerman Salisbury, known throughout Worcester as “Madame Salisbury” in deference to her family's wealth and social position, was passing a serene evening at home with her niece and adopted daughter, Eliza Weir. Her husband, Stephen, a merchant and the town's wealthiest Citizen, was away on business. The Salisbury mansion's comfortable drawing room was pleasant, graced by Elizabeth's harp and a piano bought expressly for Eliza.Suddenly, the peace was shattered as something crashed violently against the front window. Salisbury immediately “call'd in the people” (the servants) for protection. Venturing outside, they spotted no one lurking about but did find two good-sized stones, one weighing over half a pound. Peering out into the now still night, Elizabeth Salisbury noted that “it was very dark, & no one appeared to be in the street. [Y]ou may suppose I did not recover my tranquil[l]ity very soon.”

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