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Research on Intelligent Firefighting Decision Support Model Based on Multi-channel Da...
Hao Zhang
Thelma D. Palaoag

Hao Zhang

and 2 more

October 24, 2024
As modern firefighting environments grow increasingly complex, traditional equipment is often insufficient to meet the challenges posed by high-risk situations. To enhance firefighters’ situational awareness and decision-making capabilities, this study develops a multi-channel data fusion model that integrates multiple information streams, including images, electrocardiogram, pulse, and posture data. The model employs temporal and spatial synchronization analysis, coupled with deep learning algorithms such as Convolutional Neural Networks (CNN) and Recurrent Neural Networks (RNN), along with Kalman filtering and Bayesian estimation, to optimize data processing. Furthermore, weighted averaging methods, adaptive systems, and blockchain technology are utilized to ensure transparency and security in the adjustment of model weights. Experimental results demonstrate that the proposed model significantly improves data fusion accuracy, response time, and robustness, thereby enhancing both the efficiency and safety of firefighting operations. This research provides effective support for intelligent management in the firefighting domain, strengthening decision-making capabilities and situational awareness for firefighting commanders.
Carrier communication module detection method based on improved genetic BP algorithm...
Yang Lei
Liu Qiming

Yang Lei

and 5 more

October 24, 2024
In order to improve the detection ability of carrier communication module, an improved genetic BP algorithm network model is constructed, which includes BP algorithm model, genetic algorithm model, fitness evaluation module and communication anomaly diagnosis module, and can realize the comprehensive factor evaluation in the process of carrier communication. And through the point cloud registration algorithm based on machine learning to detect carrier communication anomalies, in the face of various factors such as power line conditions, signal transmission distance, signal interference, channel conditions, carrier communication equipment, system design and implementation, can quickly detect carrier communication conditions, greatly improving the detection capability of carrier communication module. Point Cloud Registration (PCR) algorithm is used to detect anomalies in real time, and the carrier communication anomaly diagnosis can be judged. Through the experiment, the error rate of carrier communication is greatly reduced, which lays a foundation for the next research.
The scaling of trophic specialization in interaction networks across levels of organi...
Gabriel Moulatlet
Pedro Luna

Gabriel Moulatlet

and 3 more

October 24, 2024
Natural ecosystems are characterized by a specialization pattern where few species are common, while many others are rare. In ecological networks involving biotic interactions, specialization operates as a continuum at individual, species, and network level. Ecological theory predicts that specialization can be primarily explained by ecological and evolutionary factors. However, we still do not understand how trophic specialization scales from individual- to the network-based level. This question has been addressed by the emerging research program on the macroecology of biotic interactions, which focuses on ecological network and macroecological theory to investigate biotic interaction patterns along environmental and geographical gradients. Based on the ecological and evolutionary traits of interacting species, the study of local networks traditionally focused on interspecific networks or individual species as independent ecological units. Instead, the macroecological perspective requires a shift towards assessing network variation across ecological gradients, while also accounting for different temporal scales (minutes, hours, days, and years), spatial scales (local, regional, and global), and levels of network organization (individuals, species, and assemblages). Despite the feasibility of scaling data, the variation across individual, species and assemblage levels in relation to network organization and geographic and environmental gradients remains unknown. Understanding the mechanisms driving species roles across different network scales is crucial for addressing knowledge gaps, which in turn requires synthesizing and clarifying the available information on these concepts. Thus, in this study we aim to examine the factors shaping trophic specialization at different levels of network organization and to review recent advances, outcomes, and future directions of the field of macroecology of biotic interactions related to specialization. By unraveling the factors and mechanisms that explain the role of each species across different network scales, we shed light on the processes underlying the assembling of natural communities and offer valuable insights into specialization gradients.
Circadian histories: latitudinally determined responses to light pollution
Victoria Amaral
Coskun Guclu

Victoria E. Amaral

and 6 more

October 24, 2024
Circadian rhythms are highly conserved across the tree of life, with light serving as the primary cue for the circadian timer. Photoperiod variation follows a latitudinal gradient, reflecting fluctuations in seasonality that increases towards the poles. As photoperiod variability intensifies at higher latitudes, organisms must develop mechanisms to maintain circadian timing during prolonged periods of light or darkness. Consequently, latitudinal gradients in photic sensitivity occur, as populations in northern latitudes have physiologically adapted to significant seasonal variations in day length. However, the rise of urbanization has introduced artificial light on a global scale, creating new photoperiods for organisms to navigate. This artificial extension of the natural photoperiod is now interacting with evolutionarily established circadian rhythms. Because photic sensitivity follows a latitudinal gradient, this may also inform biogeographic patterns of vulnerability to light pollution. We introduce the term "circadian histories" to describe an organism's evolutionary history of circadian entrainment, which may influence its response to novel light pollution.
Geodiversity is an inseparable but underutilized part of connectivity in nature conse...
Aino-Maija Määttänen
Maria Hällfors

Aino-Maija Määttänen

and 2 more

October 24, 2024
Nature conservation has shifted towards a climate change adaptation approach, in which expected species range shifts are increasingly considered. Facilitating species movements requires improving ecological connectivity across landscapes, and for these assessments, new and powerful approaches are emerging. One such approach is the use of geodiversity information as a proxy for biodiverse, resilient, and dispersal-enhancing areas. Although data on abiotic nature are routinely used in many connectivity assessments, geodiversity is not necessarily recognized by researcher due to non-explicit application of variables combined with vague definitions of terms. Here, we present a systematic literature review examining the role of geodiversity in ecological connectivity. We used the PRISMA method to review 89 research articles on the topic. Of these, 34% explicitly modeled connectivity and included geodiversity variables, while the remaining studies discussed or explored the potential effects of geodiversity on species movement and broader biodiversity patterns, without directly modeling connectivity. Our findings highlight the value of integrating geodiversity and the Conserving Nature’s Stage approach in both research and the management of connectivity and climate resilience. We identified that the key challenges hindering the widespread use of geodiversity information in biodiversity conservation stem from the limited adoption of the term outside geosciences and the lack of established quantitative metrics to explore the geodiversity-biodiversity relationship. Addressing these gaps could greatly enhance ecological connectivity assessments, thereby improving conservation outcomes. After all, geodiversity is the abiotic counterpart to biodiversity, and together these two components form the dynamics of nature that we aim to conserve.
Comprehensive Analysis of System on Chips: Architecture, Applications, and Future Tre...
Meenakshi Gupta
Sandeep Gupta

Meenakshi Gupta

and 2 more

October 24, 2024
System on Chips (SoCs) represents the peak success of integration in modern electronics by combining complex functionalities onto a single chip. This paper provides a detailed overview of SoCs, including their architecture, design considerations, applications, and future trends. from historical perspective, it explains the evolution of SoCs from early integrated circuit models to their current state of refinement and architecture. The basic building blocks of architecture of SOCs are shown to explain the integration of processor cores, memory subsystems, peripherals, and internal connections. Ideal Design considerations, such as power efficiency, performance optimization, and thermal management, are explored, focusing on the challenges faced by SoC designers. This paper further focuses on the applications of SoCs across industries, from smartphones and IoT devices to automotive electronics and medical devices. Emerging trends, such as heterogeneous computing, AI accelerators, and advanced packaging technologies are discussed, offering insights into the future trajectory of SoC development. Through case studies and analyses, this study shows the impact of SoCs on industry innovation, consumers and societal transformation. Ultimately, this research showcases the significance of SoCs in technological progress, shaping the landscape of modern electronics, and paving the way for future advancement.
Safe Passage: carotid protection during BMV in Rheumatic Mitral stenosis with left at...
RUPENDRA NATH SAHA

RUPENDRA NATH SAHA

and 1 more

October 24, 2024
A 54-year-old lady presented to our department with complaints of dyspnea on exertion for the last two years, which increased over the last three months. She also complained of abdomen distension with jaundice for the last three years with intermittent pedal oedema. On examination, she was frail and had an irregularly irregular pulse. She also had a variable S1 with a mid-diastolic murmur localised in the cardiac apex. Electrocardiography showed an atrial fibrillation with a fast ventricular rate. Echocardiography revealed a severe rheumatic mitral stenosis with a dilated left atrium and severe pulmonary hypertension assessed by tricuspid regurgitation gradient. Transesophageal Echocardiography suggested a Type IB LAA clot with no significant MR. After stabilisation of heart failure, she was opined for Mitral valve replacement with LAA clot extraction. However, given the high STS score and after counselling with family, she underwent high-risk Balloon mitral valvotomy with retrievable temporary carotid protection devices kept in the bilateral carotid artery. She became symptomatically better and was discharged. On follow-up, she said she had been rehabilitated to her usual life.
Case report: Ingestion of a duck bone that lodges in a jejunal diverticulum causing l...
Nicholas Long
Christos Costa

Nicholas Long

and 4 more

October 24, 2024
A document by Nicholas Long. Click on the document to view its contents.
ULP (urethral ligament plication) and midurethral sling: identical anatomical pathway...
Peter Petros
 Ahmet Akin Sivaslioglu

Peter Petros

and 3 more

October 24, 2024
The ULP (urethral ligament plication) operation for stress urinary incontinence is based on the same anatomical etiopathogenesis as the midurethral sling (MUS): restoring collagen to weakened PULs (pubourethral ligaments), albeit, by plication with collagenopoietic wide-bore polyester sutures to prevent PUL elongation under stress. Calculated collagenopoietic sufficiency of polyester sutures came from a doctoral thesis where collagen strength from a rejected polyester graft was tested. Precise placements of the single polyester suture to PUL were based on a live anatomical study. 12-month cure rate was 83% (learning curve included), with no post-operative urinary retention, due to absence of suburethral tapes.
Evaluation of the isotopic and hydrogeochemical processes of the interaction between...
Letycia Oliveira Venancio
Ricardo Perobelli Borba

Letycia Oliveira Venancio

and 2 more

October 24, 2024
The Missão Velha - Rio da Batateira Aquifer System and the Mauriti Aquifer in the Cariri Valley, Araripe Basin, Ceará, Brazil, were studied through chemical, isotopic, and mineralogical analyses between 2017 and 2018. Isotopic analyses included oxygen-18, deuterium, and excess deuterium, while mineralogy was assessed using X-ray diffractometry. Weathering of minerals like quartz, feldspar, and micas released ions such as sodium, potassium, magnesium, aluminum, and calcium, influencing groundwater composition. Cation exchange was identified as the main hydrochemical process, with albite weathering contributing to groundwater mineralization. The Mauriti Aquifer showed stable composition, while the Missão Velha - Rio da Batateira Aquifer experienced more pronounced ion exchange processes. Isotopic analysis confirmed groundwater origin from direct precipitation, with recharge occurring through rainfall and no evidence of evaporation or anthropogenic contamination.
Quantifying ecosystem service fluctuations in response to land cover conversion and c...
Emeka edwin Igboeli
Ogbue Chukwuka

Emeka edwin Igboeli

and 9 more

October 24, 2024
Changes in key ecosystem service parameters (Water balance residual (eWBR), Carbon storage (CS) and carbon sequestration (C.Seq)),and their response to land cover conversions and climate variability as an index of ecosystem restoration and degradation, in arid and semi-arid endorheic inland basins, vis-à-vis the Sustainable Development Goals (SDGs) remained underexplored. Thus, this study used the multi-layer perceptron model to simulate and predict land cover changes (LCC), the CASA-GRAMI, the InVEST, and Hargreaves-Sumani models estimated the ecosystem services. Whereas, the Ordinary Least Square Regression predicted changes in ecosystem services from anthropo-climatic factors while the Theil-Sen slopes, pixel correlations, and the advanced geostatistical methods examined the trends and responses of ecosystem services to land conversions and climate extremes. The results revealed degraded baseline condition in C.Seq and CS coefficients for LCB and ASB (1.858 and -0.025 and -0.002). In LCB, temperature and NDVI predicted a decreased eWBR, while, precipitation and LCC predicted a decreased CS. Also, the depletion of shrublands occasioned by its conversion to cropland degraded CS and C.Seq, opposing the SDGS. Furthermore, increased precipitation restored CS and C.Seq and vice versa. Contrastingly, in ASB, the temperature and precipitation predicted an increase eWBR, while the temperature predicted a decrease in CS. Furthermore, the conversion of bareland and grassland to cropland restored CS and C.Seq, as well as, reduced precipitation restored CS due to snowmelt and temperature increase. Temperature increases in LCB degrades CS and eWBR, while in ASB, it restores CS and carbon sink. The findings underscore the importance of adaptive and sustainable land and water management, climate strategies, and continuous monitoring of land cover changes to enhance ecosystem services and health to meet the SDGs through Inter-regional cooperation and knowledge sharing.
Efficient Signal Processing for Frequency-Agile Radar with Limited Computational Reso...
Zexi Wei
Dinghong Lu

Zexi Wei

and 2 more

October 24, 2024
Frequency-agile radar has the advantage of strong anti-jamming capabilities, but frequency agility causes coupling between target range, velocity, and carrier frequency in the echo phase, which affects coherent accumulation. Most existing methods involve high computational complexity, making them difficult to apply on platforms with limited computational resources. This letter proposes a fast HRRP generation method that does not require velocity phase compensation to generate HRRP. This method uses a specially designed waveform to convert the velocity-related phase in the echo into a linear phase. Based on this, conjugate multiplication of the echoes is performed to further transform the linear velocity term into a constant phase, and HRRP is generated using FFT. Simulation results show that this method ensures imaging quality while also offering high computational efficiency, providing a feasible solution for fast imaging in frequency-agile radar.
Large Language Models with Adaptive Token Fusion: A Novel Approach to Reducing Halluc...
Luanxu Guo

Luanxu Guo

and 4 more

October 24, 2024
Large-scale language models have rapidly become essential tools in numerous applications, from content generation to complex decision-making tasks. However, despite their impressive capabilities, challenges such as hallucinations, inefficient token processing, and high computational costs persist, often limiting their effectiveness in real-time environments. To address these issues, a novel mechanism known as Adaptive Token Fusion (ATF) is introduced, offering a strategic approach to optimizing token management within the inference pipeline. ATF leverages a token similarity assessment method to selectively merge redundant tokens, resulting in a more efficient model that processes fewer tokens while preserving semantic richness. Through rigorous experimentation on an open-source LLM, the ATF-enhanced model demonstrates significant improvements in perplexity, inference speed, memory consumption, and hallucination reduction, thereby enhancing both computational efficiency and output reliability. The approach also yields notable reductions in resource consumption, making it particularly suitable for large-scale deployments where both speed and accuracy are paramount. The results highlight the potential of tokenlevel optimizations in improving model performance, suggesting new pathways for further enhancement in token management strategies. The contribution of ATF opens new possibilities for more efficient and reliable LLM operations, especially in domains requiring high factual consistency and rapid response times.
Energy Relativity and its Implications on the Energy Conservation Principle
Moshe Segal

Moshe Segal

October 24, 2024
A corner stone of Physics is the Energy Conservation principle which states that the Energy is always conserved and that the Energy, embedded in the whole Universe, cannot disappear or be created from nothing. This should imply that the Total amount of the Energy, which is embedded in the whole Universe, must be a constant value. However, Humans are not able to devise means or experiments which will provide the exact amount of the Energy embedded in the whole Universe, which implies that Humans are not able to devise means or experiments which will conclude, with complete validity, that the amount of the Energy embedded in the whole Universe, can be indeed represented by a constant value. The above implies that Humans are not able to provide a proof for the Energy Conservation Principle, which means, that the Energy Conservation Principle is presented only as an axiom, and no discussion was yet provided as to the extent of validity that Humans can attribute to the Energy Conservation Principle, even though, it is a corner stone of the nowadays Science of Physics. Thus, in view of the above, this paper tries to examine the extent of the validity that Humans can attribute, to the Energy Conservation Principle. Initially, this paper tries to explore, if the evaluation of the amount of Energy, only in certain specific Energy components, in the Universe, will result in the evaluations of the same Energy amounts, by all Human evaluators, or, if separate Human evaluators might arrive at different results, relating to the Total Energy Content, of these certain several specific Energy components, which they evaluated. Thus, in view of the above, this paper provides significant arguments that two separate Humans, evaluating the Total Energy Content of certain several specific Energy components, in the Universe, might arrive at different results, relating to this Total Energy Content, of these several specific Energy components, which they evaluated.
A discussion related to the Energy Relativity and its Implications
Moshe Segal

Moshe Segal

October 24, 2024
A corner stone of Physics is the Energy Conservation principle which states that the Energy is always conserved and that the Energy, embedded in the Universe, cannot disappear or be created from nothing. This should imply that the Total amount of the Energy, which is embedded in the whole Universe, must be a constant value.
PSYCHOPHYSIOLOGICAL MECHANISMS OF PERCEPTION AND INTERNAL PRONUNCIATION OF ACTION WOR...
Anna Kamaniuk
Alexander Vartanov

Anna Kamaniuk

and 1 more

October 24, 2024
The phenomenon of inner speech and the related concept of internal utterance are actively studied in psychology, psycholinguistics, and cognitive neuroscience. However, there is no unified approach to defining these terms and their relationship. The verbalization of action words presents a unique challenge in determining the extent to which purely verbal processes are engaged compared to mental imagery of the corresponding actions. This distinction is crucial for developing machine learning models to classify such action-command words. The present study aims to identify the psychophysiological mechanisms underlying the perception and internal verbalization of action words, as well as the mental representation of the associated actions. Event-related potentials (ERPs) were used to comparatively investigate the neural correlates of internal prosody and action representation. Statistically significant differences were found between internal prosody and action execution representation in ERP components at the N140 and N400 latencies across multiple electrode sites. Significant differences were also observed in the perception and mental recitation of action words. Distinct ERP components were identified for the perceptual and internal utterance processes. Furthermore, the findings revealed significant differences in ERP components between the perceptual process and the prosody task, as well as between internal utterance and mental representation of action performance, in various cortical and subcortical brain structures. These results contribute to the understanding of the psychophysiological mechanisms underlying the perception and internal pronunciation of action words, and have implications for the development of brain-computer interfaces.
Experimental Study on the Effects of Vegetation and Slope on Rainfall Erosion of Reco...
Yabo Zhao
Yabo Zhao

Shumei Sui

and 2 more

October 24, 2024
[Research Objective and Significance] This study addresses soil and water loss from iron tailings by reconstructing the tailings and evaluating the impact of vegetation at various growth stages and slope gradients on runoff erosion. [Methods] Continuous monitoring of runoff initiation time, volume, and sediment yield enables a quantitative analysis of the effects of these factors on rainfall infiltration and slope erosion. [Results] Results show that bare soil slopes had average infiltration rates of 0.916, 0.891, and 0.857 mm/min, stabilizing within 9 to 12 minutes, with rates decreasing as slope gradients increased. In contrast, vegetation significantly enhances infiltration; for example, on a 15° slope, the average infiltration rates for vegetated slopes at 30, 60, and 90 days were 0.923, 0.936, and 0.943 mm/min, stabilizing at 15, 24, and 27 minutes, respectively. Furthermore, vegetation cover effectively reduces runoff rates, with cumulative runoff volume decreasing by 13%, 40%, and 53.2% at 30, 60, and 90 days. Vegetation also substantially suppresses soil erosion, with sediment yield reductions of 12.5% to 76.56%, 11.77% to 77.57%, and 11.97% to 78.66% across varying slopes. [Conclusion]After 60 days of growth, significant improvements in runoff and erosion control were observed, providing crucial insights for soil stabilization and the advancement of vegetation-based slope protection technologies.
Modified cellulose and nanocellulose extracted from coconut shell as proton - ion con...
Thivya Selvam
Siti Zafirah Zainal Abidin

Thivya Selvam

and 2 more

October 24, 2024
This study explores the synthesis and characterization of proton-conducting polymer electrolyte from cellulose and nanocellulose extracted from coconut shell powder, a sustainable resource in Malaysia. Alkali treatment, bleaching, and acid hydrolysis are used for extraction. Surface modifications through alkalization and esterification produce carboxymethyl cellulose (CMC) and carboxymethyl nanocellulose (CMNC) as polymer hosts. Adding ammonium nitrate (NH 4NO 3) develops the polymer electrolyte, which is then analysed. FTIR and NMR confirm successful modifications of cellulose and nanocellulose to CMC and CMNC, respectively. TGA shows CMNC has the lowest thermal stability due to its porous structure. XRD reveals increased amorphous properties in modified cellulose and nanocellulose. FESEM and TEM analysed the surface area and particle size. EIS indicates that the CMC–NH 4NO 3 system exhibits higher ionic conductivity than the CMNC–NH 4NO 3 system in which it showed 2.87 x 10 -1 S∙cm -1 for CMC-NH 4NO 3 and 2.07 x 10 -3 S∙cm -1 for CMNC-NH 4NO 3 at 30 wt% NH 4NO 3. The findings highlight proton-based electrolytes from modified cellulose and nanocellulose from coconut shell waste for clean, sustainable energy storage such as proton batteries.
Advancements in the study of T lymphocytes in thoracic aortic aneurysm and aortic dis...
Baolin Chen
Xueling Wang

Baolin Chen

and 3 more

October 24, 2024
Thoracic aortic aneurysms and dissection (TAAD) is a critical, life-threatening cardiovascular condition characterized by immune-mediated inflammatory infiltration and structural degradation of the aorta wall, which are pivotal in its etiology. In recent years, the significance of T lymphocytes in TAAD has increasingly garnered scientific attention. TAAD is a multifaceted vascular disorder characterized by the involvement of many immune cells, with T lymphocytes playing a pivotal role, particularly in the modulation of inflammatory responses, immunological control, and tissue damage. A comprehensive understanding of the T lymphocyte activation process in TAAD is crucial for the advancement of novel preventative and therapy strategies. This article evaluates the recent research advancements on the function of T lymphocytes in TAAD, aiming to offer novel insights for the future prevention and treatment of TAAD.
Advances in the Study of Benzo[a]pyrene on Male Reproductive Toxicity: Exploring Unde...
Ying Qu
Jianqiu Han

Ying Qu

and 5 more

October 24, 2024
Benzo[a]pyrene (B[a]P), a prominent representative of polycyclic aromatic hydrocarbons (PAHs), is a significant concern due to its environmental persistence, lipophilicity, and bioaccumulation. Research has demonstrated that B[a]P poses a threat to male reproductive health through the formation of BPDE and BPDE-DNA adducts, increased oxidative stress levels, and alterations in DNA methylation. These effects contribute to reduced sperm counts, impaired testosterone production, and damage to spermatogenic cells, while also disrupting antioxidant enzyme homeostasis and interfering with steroid gene expression. Despite the potential risks associated with B[a]P exposure, compounds such as resveratrol, Yishen Tongluo Decoction, vitamin E, quercetin, and lycopene have shown promise in mitigating B[a]P-induced reproductive toxicity. This paper will detail the reproductive toxic effects of B[a]P on males and their underlying mechanisms, as well as the protective effects of the aforementioned substances. The discussion will encompass B[a]P’s impact on endocrine function, sperm quality, and germ cell integrity, with the objective of providing a valuable reference for further studies on the reproductive toxicity of B[a]P and for the rational prevention and mitigation of health effects resulting from B[a]P exposure.
Crustose lichen diversity in Guanajuato State, Mexico
Cesar Alvarez-Mejia
Maria-Fernanda Contreras-Jimenez

Cesar Alvarez-Mejia

and 2 more

October 24, 2024
Lichens are a symbiotic form of life formed by filamentous fungi and 1 or 2 autotrophic microorganisms. Its diversity depends on the natural area conservation and pollutants presence, and they represent an ecological niche with novel secondary metabolic compounds. This work is a preliminary study of the diversity of crustose lichens in Guanajuato State, Mexico. A collection of 48 lichen samples was carried out in different places such as Cerro del Piloncillo, Cerro del Veinte, Cerro Panales, Sierra of Pénjamo, and Sierra de Lobos. Classic lichen identification tests and description, chemical reactions, and microcrystallization were carried out. Representative genera were identified, such as Xanthoria spp., Lecanora spp., Candelariella spp., and Diploschistes spp., also 21 chemical compounds were identified by microcrystallization such as gyrophoric acid and divaritic acid. The Sierra de Santa Rosa has the greatest diversity of lichens. The distribution of the diversity of crustose lichens in Guanajuato State is an indicator of the conservation of a place and the low impact of contaminants, it also contributes to the formation of the biodiversity catalog and promotes the exploration of chemical compounds, and microbiological studies in lichens. This exploratory study highlights the presence of four species widely distributed, and the distribution of crustose lichens in urban places and natural areas, which is a characteristic that can be used as an indicator of the conservation of ecosystems, the impact of pollution, and their identification, as well as a conservation and restoration studies of contaminated places.
Generative Adversarial Networks: A Review of Developments and Diverse Applications...
Agrim Jain

Agrim Jain

October 24, 2024
Frameworks called Generative Adversarial Networks (GANs) are used to train generative models in an adversarial manner. A generative model (G) that creates data and a discriminative model (D) that distinguishes between generated and real data are the two models used in GANs. In a minimax two-player game, which serves as the training process, G’s goal is to maximize D’s error rate. The efficacy of the frameworks is exhibited by means of qualitative and quantitative assessments of the samples that are generated, demonstrating its potential to produce data that is realistic. In this study, we primarily concentrate on a thorough review of all significant advancements in GANs, including the techniques and enhancements used and their efficacy. The paper will present a broad spectrum of applications that have developed since Ian J. Goodfellow and colleagues first introduced GANs. Different GAN versions, the research involved, the latest advancements, constraints, and future scope of work are also covered.
Topological evolution: an unexplored aspect of hysteresis for multiphase flow in poro...
Mohammad Ebadi
Douglas Meisenheimer

Mohammad Ebadi

and 5 more

November 15, 2024
The role of phase topology in hysteresis during fluid injection and withdrawal in porous media is not fully understood. We address this by providing experimental and theoretical evidence on three key findings. (1) The topological evolution of the nonwetting fluid is distinct from capillary pressure and specific interfacial area, with the Euler characteristic not bounded by main imbibition and drainage curves, as shown by experiments and a generalized model. (2) Saturation paths with identical capillary pressure and interfacial area show different topologies, revealing insights into energy dissipation and phase connectivity. (3) The topological evolution of the nonwetting phase follows predictable, convex set interactions, captured by a piecewise nonlinear model. These findings offer practical implications for designing subsurface hydrogen and carbon dioxide storage systems and provide a novel approach for studying complex systems with topological singularities.
Off-diagonal Ion Pressure Term Associated with Hall Fields in Collisionless Magnetic...
Kailai Wang
Lei Dai

Kailai Wang

and 8 more

October 29, 2024
Magnetic reconnection converts magnetic energy into particle energy, with ion outflows being a prominent manifestation, particularly in geospace. Hall fields are indicators of rapid energy conversion in collisionless magnetic reconnection, yet the associated ion processes and signatures are not fully understood. Here, we analyze in-situ data and simulations to identify a distinct signature in the off-diagonal component of the ion pressure tensor. This signature displays a bipolar reversal that correlates with ion outflows across the reconnection X-line. The bipolar signal arises from a distorted velocity distribution during ion acceleration. Initially, Hall electric fields induce dawnward ion motion, which is followed by enhanced ion acceleration due to reconnection electric fields during cyclotron motion around the reconnected magnetic field. This interaction distorts the velocity distribution, producing the observed bipolar signals. The off-diagonal component of the ion pressure tensor reflects increased ion acceleration and energy conversion due to Hall electric fields.
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