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Topic Review
Sensing Travel Source–Sink Spatiotemporal Ranges
Urban remote sensing is providing increasing theoretical and empirical evidence for addressing urban issues, such as traffic systems, medical health, and green spaces. Plentiful image remote sensing technologies have effectively supported the large-scale detection of urban facility distribution. However, cities do not entail only the coverage distribution of buildings, impervious surfaces, parks, and other facilities on the land, but also complex human activities among these urban facilities.  Correspondingly, the sensing of human activity phenomena is an emerging exploration in urban remote sensing. The travel source–sink phenomenon is a typical urban traffic anomaly that reflects the imbalanced dissipation and aggregation of human mobility activities. It is useful for pertinently balancing urban facilities and optimizing urban structures to accurately sense the spatiotemporal ranges of travel source–sinks, such as for public transportation station optimization, sharing resource configurations, or stampede precautions among moving crowds. 
  • 136
  • 14 Aug 2023
Topic Review
Sensing and Measurement Techniques for Nature-Based Solutions Evaluation
Sensing and measurement techniques are necessary to study, evaluate, and understand the complex physical and chemical interactions that must occur for the successful deployment of nature-based solutions (NbS). Sensing and measurement techniques can provide useful meteorological and physiological data on nature-based interventions between different spatial, spectral, temporal, and thematic scales. Because NbS encompass research from across different fields, it is essential to reduce barriers to knowledge dissemination, and enable the circulation of information across different jurisdictions. 
  • 188
  • 17 Aug 2023
Topic Review
Semi-Supervised Learning for Forest Cover Mapping
Forest cover mapping is of paramount importance for environmental monitoring, biodiversity assessment, and forest resource management. In the realm of forest cover mapping, significant advancements have been made by leveraging fully supervised semantic segmentation models. However, the process of acquiring a substantial quantity of pixel-level labelled data is prone to time-consuming and labour-intensive procedures. 
  • 97
  • 28 Sep 2023
Topic Review
Semantic Segmentation Networks for Forest Applications
Deforestation remains one of the key concerning activities around the world due to commodity-driven extraction, agricultural land expansion, and urbanization. The effective and efficient monitoring of national forests using remote sensing technology is important for the early detection and mitigation of deforestation activities. Deep learning techniques have been vastly researched and applied to various remote sensing tasks, whereby fully convolutional neural networks have been commonly studied with various input band combinations for satellite imagery applications, but very little research has focused on deep networks with high-resolution representations, such as HRNet.
  • 104
  • 08 Jan 2024
Topic Review
Selenography
Selenography is the study of the surface and physical features of the Moon. Historically, the principal concern of selenographists was the mapping and naming of the lunar maria, craters, mountain ranges, and other various features. This task was largely finished when high resolution images of the near and far sides of the Moon were obtained by orbiting spacecraft during the early space era. Nevertheless, some regions of the Moon remain poorly imaged (especially near the poles) and the exact locations of many features (like crater depths) are uncertain by several kilometers. Today, selenography is considered to be a subdiscipline of selenology, which itself is most often referred to as simply "lunar science." The word selenography is derived from the Greek lunar deity Σελήνη Selene and γράφω graphō, "I write".
  • 1.3K
  • 11 Nov 2022
Topic Review
Selection of Mercury-Resistant PGPR Strains
Mercury (Hg) is an element with a high level of toxicity that poses a serious environmental threat. It is possible for Hg to enter the food chain and consequently affect human health, even at very low concentrations.
  • 313
  • 13 Jan 2022
Topic Review
Seismic Array
A seismic array is a system of linked seismometers arranged in a regular geometric pattern (cross, circle, rectangular etc.) to increase sensitivity to earthquake and explosion detection. A seismic array differs from a local network of seismic stations mainly by the techniques used for data analysis. The data from a seismic array is obtained using special digital signal processing techniques such as beamforming, which suppress noises and thus enhance the signal-to-noise ratio (SNR). The earliest seismic arrays were built in the 1950s in order to improve the detection of nuclear tests worldwide. Many of these deployed arrays were classified until the 1990s. Today they become part of the IMS as primary or auxiliary stations. Seismic arrays are not only used to monitor earthquakes and nuclear tests, but also used as a tool for investigating nature and source regions of microseisms as well as locating and tracking volcanic tremor and analyzing complex seismic wave-field properties in volcanic areas.
  • 399
  • 29 Sep 2022
Topic Review
Sediment Quality Triad (SQT)
In aquatic toxicology, the sediment quality triad (SQT) approach has been used as an assessment tool to evaluate the extent of sediment degradation resulting from contaminants released due to human activity present in aquatic environments (Chapman, 1990). This evaluation focuses on three main components: 1.) sediment chemistry, 2.) sediment toxicity tests using aquatic organisms, and 3.) the field effects on the benthic organisms (Chapman, 1990). Often used in risk assessment, the combination of three lines of evidence can lead to a comprehensive understanding of the possible effects to the aquatic community (Chapman, 1997). Although the SQT approach does not provide a cause-and-effect relationship linking concentrations of individual chemicals to adverse biological effects, it does provide an assessment of sediment quality commonly used to explain sediment characteristics quantitatively. The information provided by each portion of the SQT is unique and complementary, and the combination of these portions is necessary because no single characteristic provides comprehensive information regarding a specific site (Chapman, 1997)
  • 350
  • 29 Nov 2022
Topic Review
Sediment Organic Contents Required for Gas Hydrate Formation
Advances in basin and petroleum system modelling have allowed for the investigation of gas hydrate systems, including modelling of the generation, migration, and accumulation of biogenic and thermogenic gas within gas hydrate deposits.
  • 345
  • 12 Oct 2022
Topic Review
Sediment load of River Birs-System
In 2015, the environmental laboratories of the cantons of Berne, Jura, Basel-Country and Basel-City, started a coordinated monitoring of the sediments of the River Birs and its major Affluents. In general, stannane concentrations in the sediments of the river Birs and its major tributaries were low and well below any target values. The sediments of the tributaries Lucelle and Lüssel showed slightly elevated concentrations for monobutyl-tin, and the sediments of the rivulet Chaluet for dibutyl-tin compounds. The same stannane groups were also elevated in the sediments of the river Birs at Birsfelden, above the confluence with the Rhine. Tri-substituted tin compounds were below the detection limit in the entire catchment. The catchment area of the river Birs is free of any nuclear industry and of industries dealing with radioactive materials. Therefore, our investigations showed the “normal” background contamination with artificial radionuclides, including the global fallout and the Chernobyl fallout. The found activities are well below the immission limits.
  • 580
  • 05 Jul 2021
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