scholarly journals Dynamic Changes of Typical Blowouts Based on High-Resolution Data: A Case Study in Hulunbuir Sandy Land, China

2017 ◽  
Vol 2017 ◽  
pp. 1-17
Author(s):  
Yi Yang ◽  
Chao Guan ◽  
Eerdun Hasi
Keyword(s):  
High Resolution ◽  
Remote Sensing Images ◽  
Short Term ◽  
Dynamic Changes ◽  
High Resolution Data ◽  
The Past ◽  
3D Terrain ◽  
Compound Type ◽  
Sand Deposition

Blowouts are an important ground indication of wind-sand activity in the Hulunbuir grassland. They include two basic geomorphologic units, erosion depression and sand deposition, and three typical morphological types: saucer type, trough type, and compound type. In this study, the dynamic changes of typical blowouts within the past decade were analyzed via multiperiod high-resolution remote sensing images. RTK was used to repeatedly measure the blowouts to obtain their high-precision 3D terrain data in 2010, 2011, and 2012. Short-term dynamic changes in 3D blowout morphology were carefully analyzed to discover the following. (1) From 2002 to 2012, the depressions of typical blowouts exhibited downwind extension and lateral expansion trends, as they continuously grew in size. Regarding the sand deposition zones, those of the saucer blowout grew continuously, while those of the trough and compound blowouts fluctuated between growth and contraction. (2) The erosion depression of saucer blowouts eroded downward and spread horizontally; that of trough blowouts first accumulated then eroded but also spread horizontally. The erosion depression of compound blowouts exhibited horizontal spreading accompanied with bottom accumulation. The sand deposition zones of all three types of blowouts exhibited decreasing length with increasing width and height.

scholarly journals Separating Geophysical Signals Using GRACE and High‐Resolution Data: A Case Study in Antarctica

2018 ◽  
Vol 45 (22) ◽  
pp. 12,340-12,349 ◽  
Author(s):  
Olga Engels ◽  
Brian Gunter ◽  
Riccardo Riva ◽  
Roland Klees
Keyword(s):  
High Resolution ◽  
High Resolution Data ◽  
Resolution Data

scholarly journals A comparative case study of MTInSAR approaches for deformation monitoring of the cultural landscape of the Shanhaiguan section of the Great Wall

2021 ◽  
Author(s):  
Hang Xu ◽  
Fulong Chen ◽  
Wei Zhou
Keyword(s):  
High Resolution ◽  
Linear Structure ◽  
Deformation Monitoring ◽  
Sar Interferometry ◽  
Comparative Case Study ◽  
Rock Falls ◽  
High Resolution Data ◽  
Heritage Sites ◽  
Great Wall

Abstract The Great Wall of China is one of the largest architectural heritage sites globally, and its sustainability is a significant concern. However, its large extent and diverse characteristics cause challenges for deformation monitoring. In this study, the Shanhaiguan section of the Great Wall was investigated in a case study to ascertain the damage and potential hazards of the architectural site. Two standard multi-temporal synthetic aperture radar interferometry (MTInSAR) technologies, including persistent scatterer SAR interferometry (PSInSAR) and small baseline subset (SBAS) SAR interferometry, were used for deformation monitoring using high-resolution TerraSAR-X data acquired in 2015–2017. The results of the two MTInSAR approaches revealed the health condition of the Great Wall. The Shanhaiguan section was stable, but local instabilities caused by rock falls were detected in some mountainous areas. In addition, the applicability of PSInSAR and SBAS was evaluated. The performance analysis of the two approaches indicated that a more reliable and adaptable MTInSAR technique needs to be developed for monitoring the Great Wall. This study demonstrates the potential of MTInSAR technology with high-resolution data for the health diagnosis of heritage sites with a linear structure, such as the Great Wall.

scholarly journals Results from six multiwavelength campaigns to study short-term FUV flux variability and phase-dependent mass loss in Be stars

1994 ◽  
Vol 162 ◽  
pp. 284-286
Author(s):  
Geraldine J. Peters
Keyword(s):  
High Resolution ◽  
Mass Loss ◽  
High Resolution Spectroscopy ◽  
Be Stars ◽  
Short Term ◽  
The Past ◽  
Flux Variability ◽  
Optical Region ◽  
Dependent Mass

During the past six years we have carried through seven multiwavelength, multisite campaigns to investigate the cause for short-term (rapid) photometric and spectroscopic variability in Be stars and assess its importance in driving the mass loss in these objects. These campaigns usually included simultaneous observations in the UV with the IUE and Voyager spacecraft and optical region with ground-based telescopes worldwide (photometry, high resolution spectroscopy, and polarimetry). Typically 10–25 observers from 5–9 countries participated. Stars that have been observed include λ Eri, ω Ori, o And, ∊ Cap, 28 Cyg, η Cen, 48 Lib, ζ Tau, ψ Per, and 2 Vul. We briefly summarize some of the results from the UV study here. Additional results from the ground-based data are given in other papers in this volume by D. Gies, M. Hahula, J. Percy, and D. McDavid.

scholarly journals Improving the Energy Saving Process with High-Resolution Data: A Case Study in a University Building

Sensors ◽  
2018 ◽  
Vol 18 (5) ◽  
pp. 1606 ◽  
Author(s):  
Jeongyun Han ◽  
Eunjung Lee ◽  
Hyunghun Cho ◽  
Yoonjin Yoon ◽  
Hyoseop Lee ◽  
...  
Keyword(s):  
High Resolution ◽  
Energy Saving ◽  
High Resolution Data ◽  
Energy Saving Process ◽  
Resolution Data

Discussion on Remote Dynamic Sensing Monitoring Method for Land in Regions under Rapid Economic Development

2012 ◽  
Vol 518-523 ◽  
pp. 5788-5792
Author(s):  
Zheng Dong Xie ◽  
Jian Zhang ◽  
Bu Zhuo Peng
Keyword(s):  
Remote Sensing ◽  
Land Use ◽  
High Resolution ◽  
Property Right ◽  
Remote Sensing Images ◽  
Monitoring Method ◽  
Nanjing City ◽  
Platform System ◽  
First Time

The paper was supported by The Second Land Investigation Item and took Nanjing city, Jiangsu Province as a case study. The research of the theory, technique and application for land use investigation was achieved by the high-resolution remote sensing images for application, designed a set of technique of land use investigation for land property right management. The database and platform system were established to carry out the dynamic management of land use. Based on the summarization of the correlative studies, The paper designed a set of technique of land investigation for land property right management and also designed the technical process, dealt with the remote sensing images, detected the changed information, classified the land, investigated the land property right and established the database to serve for the management of land property right. And it has been successfully used in Nanjing. It’s unique to use the high-resolution remote sensing images by QuichBird for the scale of 1:5000 in land use investigation in area cities which is also the first time in Nanjing City.

scholarly journals Scalable Dashboard for Identifying Split Failures and Heuristic for Reallocating Split Times

2017 ◽  
Vol 2620 (1) ◽  
pp. 83-95 ◽  
Author(s):  
Howell Li ◽  
Lucy M. Richardson ◽  
Christopher M. Day ◽  
James Howard ◽  
Darcy M. Bullock
Keyword(s):  
High Resolution ◽  
Red Light ◽  
Signal System ◽  
High Resolution Data ◽  
Fundamental Parameters ◽  
Time Periods ◽  
Split Time ◽  
Resolution Data ◽  
Drill Down

The three fundamental parameters of a traffic signal system are split, cycle, and offset. This paper describes the use of high-resolution data ( a) to identify time periods during which split parameters may be insufficient and ( b) to help practitioners identify opportunities for reallocating split time. A case study of seven corridors with 47 intersections is presented. A drill-down approach was developed to identify movements that could be improved by a reallocation of split times. A heuristic that can reallocate up to 5 seconds of underutilized green time on a competing phase was applied to those corridors. For the selected phase identified in this study, the adjustment reduced split failures by an average of 40% while also decreasing yellow occupancy an average of 40% and red light violations an average of 66%. The paper concludes by recommending that central systems implement drill-down dashboards. Such tools would enable easy identification and systemwide monitoring of split failures and would provide opportunities to reallocate slack time.

scholarly journals The calcium-dust relationship in high-resolution data from Dome C, Antarctica

2011 ◽  
Vol 7 (2) ◽  
pp. 1113-1137 ◽  
Author(s):  
F. Lambert ◽  
M. Bigler ◽  
J. P. Steffensen ◽  
M. Hutterli ◽  
H. Fischer
Keyword(s):  
High Resolution ◽  
Ice Core ◽  
Calcium Content ◽  
Depth Resolution ◽  
Dust Particles ◽  
Radiation Balance ◽  
High Resolution Data ◽  
The Past ◽  
Low Correlation ◽  
Soluble Calcium

Abstract. Ice core data from Antarctica provide detailed insights into the characteristics of past climate, atmospheric circulation, as well as changes in the aerosol load of the atmosphere. We present high-resolution records of soluble calcium (Ca2+), non-sea-salt soluble calcium (nssCa2+), and insoluble mineral aerosol dust from the East Antarctic Plateau at a depth resolution of 1 cm, spanning the past 800 000 yr. The comparison shows that the ratio of ionic proxies such as CaCa2+ (or nssCa2+) to particulate dust aerosol is variable in time. Accordingly, the insoluble dust record is representative of large and small atmospheric particulate dust load changes and better suited to quantify the aerosol effect on the radiation balance in the past. In contrast soluble dust proxies such as Ca2+ and nssCa2+ will underestimate this effect but may be better suited to quantify the deposition of chemically active Ca2+ or other soluble dust derived nutrients into the Southern Ocean. The correlation between nssCa2+ and particulate dust is time dependent with high correlations during glacial and low correlation during interglacial times. The low correlation during warm times may be partly caused by changes in the soluble calcium content of dust particles, possibly due to a more acidic atmosphere during interglacials. The ratio of nssCa2+ to dust is dependent on the dust concentration itself. A simple mixing of two dust end members for glacial and interglacial conditions with nssCa2+ to dust ratios of 0.045 and approximately 0.3, respectively, can explain the overall temporal change in the nssCa2+ to dust ratio over time.

scholarly journals The Resilience of Small Television Markets to COVID-19: the Case of Lockdown

2020 ◽  
Vol 8 (1) ◽  
pp. 82-89
Author(s):  
Tim Raats
Keyword(s):  
Financial Planning ◽  
Short Term ◽  
Social Distancing ◽  
The Past ◽  
High Dependency ◽  
The Ideal ◽  
Damaging Effects

AbstractThis article presents a case study of Lockdown, an anthology series developed by two production companies under strict COVID restrictions in Flanders, centred on a prison visiting space. Every episode is written and directed by different screenwriters and directors. The case study clearly shows how a combination of creativity of Flemish independent producers, a felt need to counter the damaging effects of COVID on Flemish audio-visual industries, and the need to produce under strict hygienic and social distancing rules, resulted in a unique creative concept, that, ironically, might not have been achievable under normal circumstances. The analysis shows that the smallness of the Flemish market, which over the past decades resulted in an industry dynamism characterized by improvisation, voluntarism, high dependency on collaboration and short term financial planning, is precisely what might have provided the ideal backdrop for the production of this unique series.

Sign in / Sign up

Export Citation Format

Share Document