A nonlinear background removal method for seismo-ionospheric anomaly analysis under a complex solar activity scenario: A case study of the M9.0 Tohoku earthquake

2012 ◽  
Vol 50 (2) ◽  
pp. 211-220 ◽  
Author(s):  
Liming He ◽  
Lixin Wu ◽  
Sergey Pulinets ◽  
Shanjun Liu ◽  
Fan Yang
Keyword(s):  
Solar Activity ◽  
Tohoku Earthquake ◽  
Removal Method ◽  
Background Removal ◽  
Anomaly Analysis

The Research of Starry-Sky Image Bright Stray Light Background Suppression Method

2014 ◽  
Vol 989-994 ◽  
pp. 4107-4110
Author(s):  
Shao Jun Guo ◽  
Zhe Wang
Keyword(s):  
Stray Light ◽  
Background Suppression ◽  
Background Light ◽  
Removal Method ◽  
Background Removal ◽  
Imaging Characteristics ◽  
Target Extraction ◽  
Suppression Method ◽  
Gray Areas

The space-based visible observation imaging platform for sky targets is influenced by many factors, a serious factor is the light of background too bright. A image with the bright stray light background has some high gray areas those may submerge the targets info. Aimed at the shortcomings of traditional background removal method in target extraction under the bright stray light background, according to the differences of bright stray light background and sky targets imaging characteristics, this paper has made some research of the algorithms about how to remove the bright stray light background but not delete the targets info. The algorithm we got that give us great results will be shown in the paper. It solves the problems of the bright background light removal and greatly retain the targets info which submerged in the bright areas.

Case Study on Heavy Rainfall-Induced Reactivation of Seismically Disturbed Slope Caused by the 2011 off the Pacific Coast of Tohoku Earthquake

2012 ◽  
pp. 323-329
Author(s):  
Yoshimi Usui ◽  
Hiroshi Shimada ◽  
Hiroyuki Innami ◽  
Kiyoshi Amao ◽  
Koji Higashi ◽  
...  
Keyword(s):  
Heavy Rainfall ◽  
Pacific Coast ◽  
Tohoku Earthquake ◽  
The Pacific

scholarly journals Postmidnight equatorial plasma irregularities on the June solstice during low solar activity – a case study

2019 ◽  
Vol 37 (4) ◽  
pp. 657-672
Author(s):  
Claudia M. N. Candido ◽  
Jiankui Shi ◽  
Inez S. Batista ◽  
Fabio Becker-Guedes ◽  
Emília Correia ◽  
...  
Keyword(s):  
Solar Activity ◽  
Low Latitude ◽  
Plasma Irregularities ◽  
Fabry Perot ◽  
June Solstice ◽  
Spread F ◽  
Plasma Depletions ◽  
Dip Angle ◽  
Layer Peak

Abstract. We present a case study of unusual spread-F structures observed by ionosondes at two equatorial and low-latitude Brazilian stations – São Luís (SL: 44.2∘ W, 2.33∘ S; dip angle: −6.9∘) and Fortaleza (FZ: 38.45∘ W, 3.9∘ S; dip angle: −16∘). The irregularity structures observed from midnight to postmidnight hours of moderate solar activity (F10.7 < 97 sfu, where 1 sfu = 10−22 W m−2 s−1) have characteristics different from typical post-sunset equatorial spread F. The spread-F traces first appeared at or above the F-layer peak and gradually became well-formed mixed spread F. They also appeared as plasma depletions in the 630.0 nm airglow emissions made by a wide-angle imager located at the nearby low-latitude station Cajazeiras (CZ: 38.56∘ W, 6.87∘ S; dip angle: −21.4∘). The irregularities appeared first over FZ and later over SL, giving evidence of an unusual westward propagation or a horizontal plasma advection. The drift-mode operation available in one of the ionosondes (a digital portable sounder, DPS-4) has enabled us to analyze the horizontal drift velocities and directions of the irregularity movement. We also analyzed the neutral wind velocity measured by a Fabry–Pérot interferometer (FPI) installed at CZ and discuss its possible role in the development of the irregularities.

The energy efficiency and carbon footprint of temporary homes: a case study from Japan

2017 ◽  
Vol 8 (4) ◽  
pp. 326-343 ◽  
Author(s):  
Matti Kuittinen ◽  
Atsushi Takano
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Carbon Footprint ◽  
Energy Demand ◽  
Tohoku Earthquake ◽  
Energy Performance ◽  
Refugee Camps ◽  
Content Type ◽  
Proper Design

Purpose The purpose of this study is to investigate the energy efficiency and life cycle carbon footprint of temporary homes in Japan after the Great Eastern Tohoku Earthquake in 2011. Design/methodology/approach An energy simulation and life cycle assessment have been done for three alternative shelter models: prefabricated shelters, wooden log shelters and sea container shelters. Findings Shelter materials have a very high share of life cycle emissions because the use period of temporary homes is short. Wooden shelters perform best in the comparison. The clustering of shelters into longer buildings or on top of each other increases their energy efficiency considerably. Sea containers piled on top of each other have superb energy performance compared to other models, and they consume even less energy per household than the national average. However, there are several gaps of knowledge in the environmental assessment of temporary homes and field data from refugee camps should be collected as part of camp management. Originality/value The findings exemplify the impacts of the proper design of temporary homes for mitigating their energy demand and greenhouse gas emissions.

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