Article
Geochemistry & Geophysics
Xueqian Pang, Cheng Xue, Yangping Liu, Li Yin, Yufeng Gao, Yanshu Yin
Summary: This study analyzed the reservoir architecture characteristics in the Nanpu 1-29 area of the Jidong Oilfield in China, focusing on the river type, sedimentary layers, and sand body distribution. Through comprehensive analysis, the study determined the scale of the braided rivers, quantitatively established the relationships among the scale of the braided river, the channel bar, and the braided channel, and examined the filling types and combination patterns of the channels. The findings of this study are significant for guiding the development of the oilfield.
Article
Engineering, Geological
Qingyuan He, Lei Zhu, Yingchun Li, Danqi Li, Boyang Zhang
Summary: Understanding the hydraulic fracture (HF) re-orientation mechanism is crucial for screen-out prevention in the petroleum industry and caveability management in the mining industry. The proposed UDEC T-W model can well simulate HF propagation in rocks of different homogeneity, and higher rock strength weakens the impact of differential stress on HF propagation. Recommendations for effective hydraulic fracturing at mine sites are provided based on the research findings.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Water Resources
Jeffery Tyler McGarr, Corey D. Wallace, Dimitrios Ntarlagiannis, Daniel M. Sturmer, Mohamad Reza Soltanian
Summary: This study combined geophysical techniques with physical and chemical sediment analyses to investigate the influence of sedimentary architecture on hyporheic exchange dynamics within a compound bar deposit. Results from electromagnetic induction and time-lapse electrical resistivity imaging revealed variability in electrical conductivity and solute mixing dynamics within the compound bar.
HYDROLOGICAL PROCESSES
(2021)
Article
Chemistry, Multidisciplinary
Lizheng Wang, Fanglin Niu, Jingjing Jin, Ling Yu
Summary: This paper investigates the theoretical properties and experimental results of the secondary LT coding anti-eavesdropping scheme. The experiments show that the scheme can improve the untranslated efficiency of eavesdroppers, reduce decoding complexity and the number of encoded symbols, and enhance the efficiency of information transmission.
APPLIED SCIENCES-BASEL
(2023)
Article
Mechanics
Connor O'Shaughnessy, Enrico Masoero, Peter D. Gosling
Summary: Structural topology optimization is an important complement to additive manufacturing techniques. The discrete element method is better suited for describing important materials and processes such as granular materials, powder-based 3D printing, or structural collapse. By adapting the established framework of SIMP topology optimization to the discrete element method, we successfully addressed the problem of stiffness maximization. The discrete element method captures geometric nonlinearity without additional complexity and can handle different types of supports.
Review
Geology
Roger G. Skirrow
Summary: This study critically assesses the characteristics of ten metallogenic provinces hosting iron oxide Cu-Au deposits and proposes a new classification framework. The classification is based on geological settings, oxide-sulfide mineralogy, and ore geochemical characteristics, and distinguishes these deposits from other mineral systems. The IOCG and ISCG deposits in CGI mineral systems are characterized by elevated levels of Fe and associations with Cu and Au, forming a distinctive resource. The geochemical variations in these deposits are correlated with redox characteristics and geological-tectonic settings, suggesting fundamental factors in their formation.
ORE GEOLOGY REVIEWS
(2022)
Article
Engineering, Electrical & Electronic
Kefayet Ullah, Satheesh Bojja Venkatakrishnan, John L. Volakis
Summary: This article presents a 4-channel code-multiplexed digital receiver for 5G millimeter-wave communications. The receiver overcomes hardware complexity, cost, and power consumption issues by using a single wideband analog-to-digital converter (ADC) for multiple channels. The effectiveness of the receiver is demonstrated through extensive experimental measurements and validation using performance metrics.
IEEE JOURNAL OF MICROWAVES
(2023)
Article
Environmental Sciences
Zhangshuan Hou, Huiying Ren, Christopher J. Murray, Xuehang Song, Yilin Fang, Evan Arntzen, Xingyuan Chen, James C. Stegen, Maoyi Huang, Jesus D. Gomez-Velez, Zhuoran Duan, William A. Perkins, Marshall C. Richmond, Timothy D. Scheibe
Summary: The study discusses the importance of hydrologic exchange between river channels and adjacent subsurface environments in influencing water quality and ecosystem function, as well as the need for predictive numerical models to support sustainable watershed management. By using hydromorphic classification to extrapolate outputs from local-scale models to reduced-order models, there is potential to improve predictions of large-scale river corridor hydrobiogeochemical processes.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Engineering, Civil
Xuehang Song, Yilin Fang, Jie Bao, Huiying Ren, Zhuoran Duan, William Perkins, Huifen Zhou, Zhangshuan Hou, Yunxiang Chen, Tim Scheibe
Summary: Hydrological exchange flows (HEFs) and transit time in a river-aquifer system are important for contaminant plume migration and biogeochemical processes. This study used a sophisticated model to assess the spatial variability of HEFs and transit time in a large river corridor, showing strong correlations between aquifer hydrogeological structure and exchange flux extent. The transit time patterns are complex and influenced by various factors, providing insights for developing reduced-order models for large river systems.
JOURNAL OF HYDROLOGY
(2021)
Article
Computer Science, Interdisciplinary Applications
Jie Bao, Yunxiang Chen, Yilin Fang, Xuehang Song, William Perkins, Zhuoran Duan, Pin Shuai, Huiying Ren, Zhangshuan Hou, Marshall Richmond, Xiaoliang He, Timothy Scheibe
Summary: In this study, a modeling framework is developed to evaluate the hydrologic exchange fluxes and residence times at the river and subsurface interface. The results show that hydrodynamic pressure has an impact on the water exchange between the river and subsurface domain.
ENVIRONMENTAL MODELLING & SOFTWARE
(2022)
Article
Engineering, Electrical & Electronic
G. Penchalaiah, R. Ramya
Summary: The article introduces an effective control scheme combining the Harris Hawks Optimization Algorithm and the Tabu Search Algorithm to enhance voltage regulation and stability in power systems. By optimizing the parameters of power system stabilizers, the proposed HHO-TSA control system successfully improves system damping ratio and reduces mutual influence during transient stability, as demonstrated in Eigenvalue analysis for various system configurations.
INTERNATIONAL JOURNAL OF ELECTRONICS
(2022)
Article
Engineering, Civil
Xingyuan Chen, Raymond Mark Lee, Dipankar Dwivedi, Kyongho Son, Yilin Fang, Xuesong Zhang, Emily Graham, James Stegen, Joshua B. Fisher, David Moulton, Timothy D. Scheibe
Summary: Watersheds are crucial for water supply and ecosystem health, yet there is a lack of quantification in studying the impacts of extreme events. It is essential to understand the effects of environmental perturbations on watershed systems and develop a data-model fusion system for assessment and parameterization.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Environmental
Lazaro J. Perez, Rishi Parashar, Andrew Plymale, Timothy D. Scheibe
Summary: Microbial biofilms are widely present in porous media, affecting the physical properties and solute transport. The study finds that biofilms play a major role in shaping the observed transport dynamics, enhancing anomalous characteristics and extending the tailing. The presence of biofilm leads to spatially correlated pore structure and intermittent behavior.
Article
Environmental Sciences
Gabriel Perez, Jesus D. Gomez-Velez, Xingyuan Chen, T. Scheibe, Yunxiang Chen, Jie Bao
Summary: Analytical solutions for the three-dimensional groundwater flow equation have been widely used to gain insight about subsurface flow structure. This study demonstrates the advantages of using a pre-assigned frequency spectrum targeting dominant frequencies based on rigorous statistical analysis. The new approach better describes fluxes and residence times for well-defined spatial scales, while presenting similar performance for more complex scenarios.
WATER RESOURCES RESEARCH
(2021)
Review
Environmental Sciences
Dipankar Dwivedi, Carl Steefel, Bhavna Arora, Jill Banfield, John Bargar, Maxim Boyanov, Scott C. Brooks, Xingyuan Chen, Susan S. Hubbard, Dan Kaplan, Kenneth M. Kemner, Peter S. Nico, Edward J. O'Loughlin, Eric M. Pierce, Scott L. Painter, Timothy D. Scheibe, Haruko M. Wainwright, Kenneth H. Williams, Mavrik Zavarin
Summary: This paper reviews the extensive research conducted by the US Department of Energy at representative sites and testbeds, exploring the distribution of contaminants and nutrients in water resources and their interactions with carbon and nitrogen dynamics. The paper also describes state-of-the-art characterization approaches and models for predicting contaminant fate and transport.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Energy & Fuels
A. Geetha, J. Santhakumar, K. Mohana Sundaram, S. Usha, T. M. Thamizh Thentral, C. S. Boopathi, R. Ramya, Ravishankar Sathyamurthy
Summary: The study focuses on developing an efficient neural network model for estimating solar radiation, and determines the optimal model through evaluating different ANN models and algorithms. The research highlights the impact of the entire dataset on the ANN model's prediction performance and explores the significance of determining the accurate number of hidden layer neurons in the developed model.
Article
Medicine, General & Internal
Ramya Ramanathan, Janani Shanmugavadivu Mohan, Shanthi Ramesh, Sundari Subramanian
Summary: Childhood obesity is becoming an increasingly serious problem in developing countries like India. Mothers' lack of knowledge about factors such as food and physical activity contributes to the increased risk of childhood overweight and obesity. Health education and intervention programs are needed to increase mothers' awareness and knowledge, and to reduce the occurrence of childhood obesity.
JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Yunxiang Chen, Jie Bao, Yilin Fang, William A. Perkins, Huiying Ren, Xuehang Song, Zhuoran Duan, Zhangshuan Hou, Xiaoliang He, Timothy D. Scheibe
Summary: Developing accurate and efficient modeling techniques for streamflow at the tens-of-kilometers spatial scale and multi-year temporal scale is critical for evaluating and predicting the impact of climate- and human-induced discharge variations on river hydrodynamics. In this study, the authors demonstrate the feasibility of three-dimensional hydrodynamic modeling of natural rivers at a 30 km and 5-year scale using OpenFOAM. Through the integration of various techniques, accurate modeling results were achieved with high computational efficiency.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Computer Science, Artificial Intelligence
Huiying Ren, Xuehang Song, Yilin Fang, Z. Jason Hou, Timothy D. Scheibe
Summary: This study developed simplified models of hydrologic exchange flows and transit time distributions using machine learning methods, integrating field observations and simulation data. The results showed that Random Forest and Extreme Gradient Boosting models achieved 70% to 80% accuracy in the Columbia River Corridor, serving as effective alternatives to computationally demanding numerical models.
FRONTIERS IN ARTIFICIAL INTELLIGENCE
(2021)
Article
Medicine, General & Internal
Ravikumar Srinithi, Ramanadhan Ramya, Arumpuliyur Pattabiraman Krithika, Subramanian Sundari
Summary: Scrub typhus, an acute febrile illness, is increasingly noted in children nowadays, but is often underdiagnosed due to its atypical presentation. This report presents a case of a 10-year-old boy initially diagnosed with lobar pneumonia, later confirmed to have scrub typhus infection, and showed dramatic response to specific treatment with doxycycline. It is crucial for treating physicians to have a high index of suspicion for this re-emerging infectious disease.
GOMAL JOURNAL OF MEDICAL SCIENCES
(2021)
Correction
Genetics & Heredity
Andrea Mary Francis, R. Ramya, Nalini Ganesan, P. Kumarasamy, Solomon F. D. Paul, A. K. Munirajan, M. Divya
Article
Water Resources
Hyun-Seob Song, James C. Stegen, Emily B. Graham, Timothy D. Scheibe
Summary: The development of reliable biogeochemical models requires consideration of microbial interactions with hydrology. The resilience of microbial communities to hydrologic perturbations, influenced by historical contingency, plays a critical role in understanding microbial functional dynamics. Specialized microbial functions exhibit greater historical contingency in resilience compared to redundant functions, with hysteresis predicted in transitions across conditions.
FRONTIERS IN WATER
(2021)