Article
Engineering, Geological
Dong-sheng Xu, Heng-xiao Zhao, Xiaochun Fan, Yue Qin
Summary: The impact of spatial distribution of fine sand layers on the mechanical behavior of coral sand was studied. It was found that the fine particle interlayer has a diffusion effect on stress transfer, resulting in a 10%-20% increase in strength. A parameter was proposed to quantify the spatial distribution of fine particle interlayers, and its impact on strength was particularly significant under high confining pressures.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
John Paige, Geir-Arne Fuglstad, Andrea Riebler, Jon Wakefield
Summary: This study improves the spatial aggregation of population distribution by introducing a new aggregation model that accounts for aggregation errors in a simple and transparent manner. Compared to traditional approaches, the proposed model demonstrates better robustness and stability.
SPATIAL STATISTICS
(2022)
Article
Chemistry, Physical
Zhiguang Han, Jianzhang Xiao, Yingqi Wei
Summary: Microbial-induced calcium carbonate can effectively reduce the potential for sand liquefaction, providing an environmentally friendly and promising approach for liquefaction treatment. However, the complex distribution of calcium carbonate deposition caused by microbial activities and bacterial nutrient seepage can result in variations in solidification strength and improvement effect.
Article
Water Resources
Xianze Cui, Jin Li, Guangdong Yang, Wenbin Fei, Shengyong Ding, Yong Fan
Summary: This article discusses the effects of temperature on the movement of suspended particles in porous media during the backfilling process of ground-water heat pump systems. The experimental results show that higher temperatures promote the deposition and spread of particles, as well as the capture of more particles in the sand layer.
HYDROLOGICAL PROCESSES
(2023)
Article
Oceanography
Matthew R. Baker, Alex De Robertis, Robert M. Levine, Daniel W. Cooper, Edward V. Farley
Summary: Sand lance are small forage fish playing a key role in pelagic ecosystems, recent studies in the Arctic have noted increased aggregations, indicating a potential expansion of boreal species into Arctic marine habitats.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2022)
Article
Geosciences, Multidisciplinary
Anastasios Nikitas, Georgios Makrodimitras, Maria V. Triantaphyllou, Nikolaos Pasadakis, Kimon Christanis, Stavros Kalaitzidis, Grigoris Rousakis, Ioannis Panagiotopoulos, Alexandra Gogou, Alexandros Papadopoulos, Efthimios Tartaras, Aristofanis Stefatos
Summary: Due to the lack of deep wells in the broader region, studying mud volcanic deposits can improve the geological understanding of the Mediterranean Ridge. In this study, biostratigraphic and geochemical analyses were performed on mud breccia deposits from five Mud Volcanoes in the central MR. The results indicate the origin of these deposits and provide insights into the source rock potential. Seismic data is also used to determine the distribution of major lithostratigraphic formations.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Chemistry, Inorganic & Nuclear
Urszula Wiacek, Urszula Woznicka
Summary: This study presents cases of observed artifacts in neutron logging for geophysical prospecting, which are mainly related to differences in neutron transport properties of adjacent media. A numerical experiment was conducted to measure detector response near geological formation boundaries, accurately registering these artifacts on the logging curve. The MCNP6 code was used to solve neutron transport problems in complex systems and explain the presence of artifacts based on the physics of neutron transport.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Multidisciplinary Sciences
Richard J. Camp, David L. Miller, Stephen T. Buckland, Steve J. Kendall
Summary: Birds often have specific habitat requirements, which can lead to complex study areas with changing boundaries. Spatial models, such as the soap film smoother, are needed to respect these boundaries and make informed decisions for species conservation and management. The soap film smoother predicted different densities in different parts of the study area, with higher densities along the boundary where suitable habitat was adjacent.
Article
Environmental Sciences
Hamida Mallem, Zohra Houyou
Summary: Ploughing and overgrazing in arid zones can lead to land degradation, with silting and wind erosion as consequences. Some plants disappear while others adapt. This study aimed to identify steppe plants that can grow in silted environments and determine their distribution on sand dunes. Vegetation inventories were conducted using the floristic transect method in the Mokrane region in March 2019. Results showed that certain perennial plants were able to fix moving sediments, resulting in lower heights of Aeolian deposits compared to non-fixed deposits. The study also revealed the role of perennial species in sand fixation and the order of plant establishment on trapped sediments.
FRESENIUS ENVIRONMENTAL BULLETIN
(2022)
Article
Multidisciplinary Sciences
Safaa Al -Ali, Sattar Al-Khafaji
Summary: This research predicts the spatial distribution of sand and gravel deposits and their reserves using geostatistical interpolation approaches. The results show that Al-Tuba, Al-Rafiya, and Chwaibda blocks have gravelly sand deposits while Safwan block has sandy gravel deposits. The reserves estimation is 376.63 million m3 and 385.97 million m3 using the IDW and OK approaches, respectively, with the OK method being more accurate.
KUWAIT JOURNAL OF SCIENCE
(2023)
Article
Infectious Diseases
Ali Bordbar, Parviz Parvizi
Summary: This study investigated the spatial distribution of visceral and cutaneous leishmaniasis vectors using ArcGIS modeling system and created risk maps. The research found that bioclimatic diversity has an impact on the gene expression of vaccine traits.
BMC INFECTIOUS DISEASES
(2021)
Article
Entomology
Renato Portela Salomao, Cesar Murilo de Albuquerque Correa, Sergio Santorelli Junior, Albertina Pimentel Lima, Wiliam Ernest Magnusson, Eliene Fontes Arruda, Ana Paula Vieira de Oliveira, Ricardo Cesar Correa Cabral
Summary: The recognition and use of food resources in animal species may vary according to availability. Dung beetle species feed from a wide range of food resources, including feces, carrion, and rotten fruit. The study aimed to assess the attractiveness and preference of different food types for dung beetles in Campinarana. The results showed that the diet of dung beetles dwelling in Campinaranas is relatively strict, with species being attracted mostly to carrion or feces, regardless of the availability of other food types.
INTERNATIONAL JOURNAL OF TROPICAL INSECT SCIENCE
(2023)
