Tootfinder

"‘Brownfields can be rich habitats’: the abandoned oil refinery where wildlife now thrives"
#Wildlife #Environment

(2020) Economic growth is incompatible with biodiversity conservation #environment

Economic growth is incompatible with biodiversity conservation
The increase in resource consumption and polluting emissions as a result of economic growth is not compatible with biodiversity conservation. However, most international policies on biodiversity and sustainability advocate economic growth. These are the main conclusions of the study "Biodiversity policy beyond economic growth," published this week in the scientific journal Conservation Letters. This contradiction became clear after a review of international scientific and policy work on the sub…

Identifying Key Features for Establishing Sustainable Agro-Tourism Centre: A Data Driven Approach
Alka Gadakh, Vidya Kumbhar, Sonal Khosla, Kumar Karunendra
https://arxiv.org/abs/2509.09214

Identifying Key Features for Establishing Sustainable Agro-Tourism Centre: A Data Driven Approach
Agro-tourism serves as a strategic economic model designed to facilitate rural development by diversifying income streams for local communities like farmers while promoting the conservation of indigenous cultural heritage and traditional agricultural practices. As a very booming subdomain of tourism, there is a need to study the strategies for the growth of Agro-tourism in detail. The current study has identified the important indicators for the growth and enhancement of agro-tourism. The study…

On anisotropic energy conservation criteria of incompressible fluids
Yanqing Wang, Wei Wei, Yulin Ye
https://arxiv.org/abs/2509.08348 https://arxiv.org/pdf…

On anisotropic energy conservation criteria of incompressible fluids
In this paper, by means of divergence-free condition, we establish an anisotropic energy conservation class enabling one component of velocity in the largest space $L^{3} (0,T; B^{1/3}_{3,\infty})$ for the 3D inviscid incompressible fluids, which extends the celebrated result obtained by Cheskidov, Constantin, Friedlander and Shvydkoy in [15, Nonlinearity 21 (2008)]. For viscous flows, we generalize famous Lions's energy conservation criteria to allow the horizontal components and vertical part…

3D forest semantic segmentation using multispectral LiDAR and 3D deep learning
Narges Takhtkeshha, Lauris Bocaux, Lassi Ruoppa, Fabio Remondino, Gottfried Mandlburger, Antero Kukko, Juha Hyypp\"a
https://arxiv.org/abs/2507.08025

3D forest semantic segmentation using multispectral LiDAR and 3D deep learning
Conservation and decision-making regarding forest resources necessitate regular forest inventory. Light detection and ranging (LiDAR) in laser scanning systems has gained significant attention over the past two decades as a remote and non-destructive solution to streamline the labor-intensive and time-consuming procedure of forest inventory. Advanced multispectral (MS) LiDAR systems simultaneously acquire three-dimensional (3D) spatial and spectral information across multiple wavelengths of the…

Cosmic structure formation in massive conformal gravity
F. F. Faria, G. S. Silva
https://arxiv.org/abs/2508.09244 https://arxiv.org/pdf/2508.09244

Cosmic structure formation in massive conformal gravity
We study the evolution of matter density perturbations in the framework of massive conformal gravity (MCG). Starting from the conservation of the energy-momentum tensor, we find the continuity and Euler equations for the conformal perfect fluid that fills the MCG universe. We then obtain the perturbed MCG cosmological equations, from which we derive the equation that determines the growth of matter fluctuations in the MCG universe. The resulting growth equation shows that MCG enhances cosmic st…

Entropy-conservative numerical fluxes for compressible Euler equations with thermally perfect gas models
Alessandro Aiello, Carlo De Michele, Gennaro Coppola
https://arxiv.org/abs/2507.08115

Entropy-conservative numerical fluxes for compressible Euler equations with thermally perfect gas models
This study proposes a novel spatial discretization procedure for the compressible Euler equations that guarantees entropy conservation at a discrete level for thermally perfect gases. The procedure is based on a locally conservative formulation, and extends the entropy-conserving schemes to the more realistic case of thermally perfect gases, while still guaranteeing preservation of both linear invariants and kinetic energy. The proposed methodology, which can also be extended to multicomponent …

If it was up to me, I'd ONLY save the ugly animals https://www.abc.net.au/news/2025-06-25/ugly-endangered-animals-ignored-in-conservation-bias/105443062

Wildlife experts say ugly endangered animals are being ignored in conservation efforts
While there are plenty of conservation efforts and community love for cute marsupials like the western ringtail possum, researchers say that pretty privilege is threatening the existence of blood suckers and web weavers.

A Structured Review of Underwater Object Detection Challenges and Solutions: From Traditional to Large Vision Language Models
Edwine Nabahirwa, Wei Song, Minghua Zhang, Yi Fang, Zhou Ni
https://arxiv.org/abs/2509.08490

A Structured Review of Underwater Object Detection Challenges and Solutions: From Traditional to Large Vision Language Models
Underwater object detection (UOD) is vital to diverse marine applications, including oceanographic research, underwater robotics, and marine conservation. However, UOD faces numerous challenges that compromise its performance. Over the years, various methods have been proposed to address these issues, but they often fail to fully capture the complexities of underwater environments. This review systematically categorizes UOD challenges into five key areas: Image quality degradation, target-relat…

ForestWatch argues that the Roadless Rule does not stand in the way of fuel reduction or fire management,
noting that the Forest Service has approved multiple projects in roadless areas of Los Padres National Forestin recent years,
including Pine Mountain in Ventura County — “demonstrating that fire-related work can and does move forward even when such projects are considered controversial.” 
Bryant Baker, director of conservation and research at ForestWatch, called wildfir…

Vidyut3d: a GPU accelerated fluid solver for non-equilibrium plasmas on adaptive grids
Hariswaran Sitaraman, Nicholas Deak, Taaresh Taneja
https://arxiv.org/abs/2507.08200

Vidyut3d: a GPU accelerated fluid solver for non-equilibrium plasmas on adaptive grids
We present the numerical methods, programming methodology, verification, and performance assessment of a non-equilibrium plasma fluid solver that can effectively utilize current and upcoming central processing and graphics processing unit (CPU+GPU) architectures, in this work. Our plasma fluid model solves the coupled conservation equations for species transport, electrostatic Poisson and electron temperature on adaptive Cartesian grids. Our solver is written using performance portable adaptive…

CLINN: Conservation Law Informed Neural Network for Approximating Discontinuous Solutions
Weiheng Zeng, Ruoxi Lu, Tiegang Liu
https://arxiv.org/abs/2509.02091 https://

CLINN: Conservation Law Informed Neural Network for Approximating Discontinuous Solutions
Physics-informed Neural Network (PINN) faces significant challenges when approximating solutions to conservation laws, particularly in ensuring conservation and accurately resolving discontinuities. To address these limitations, we propose Conservation Law-informed Neural Network (CLINN), a novel framework that incorporates the boundedness constraint, implicit solution form, and Rankine-Hugoniot condition of scalar conservation laws into the loss function, thereby enforcing exact conservation p…

Most cloud companies have pledged to return more water to communities than they consume by 2030. But datacentre water consumption is rising inline with corporate thirst for cloud services. How are CSPs doing at making targets for water conservation a reality?
https://www.computing.co.uk/research/2025/

Cooling the Cloud: Is ‘water positive by 2030’ just a pipedream?
Most cloud companies have pledged to return more water to communities than they consume by 2030. But datacentre water consumption is rising inline with corporate thirst for cloud services. How are CSPs doing at making targets for water conservation a reality?

Hierarchy of Qubit Dynamical Maps in the Presence of Symmetry and Coherence
Unnati Akhouri
https://arxiv.org/abs/2509.04790 https://arxiv.org/pdf/2509.0479…

Hierarchy of Qubit Dynamical Maps in the Presence of Symmetry and Coherence
We investigate the relationship between symmetries and thermodynamic transformations by analyzing how global energy conservation and coherence resources affect the local dynamics of subsystems. We prove that U(1) conservation fundamentally constrains quantum thermodynamic operations through charge conservation of Pauli strings. Our no-go theorem shows that U(1) dynamics cannot generate local coherence from diagonal thermal states, restricting thermal operations to phase-covariant maps. Breaking…

Soft Unification of Exceptional EFTs in de Sitter space
Zong-Zhe Du
https://arxiv.org/abs/2509.08979 https://arxiv.org/pdf/2509.08979

Soft Unification of Exceptional EFTs in de Sitter space
We uncover a surprising universal soft behaviour (USB) of a de Sitter (dS) S-matrix for \textit{all} exceptional effective field theories (EFTs) in dS space, stemming from the recently proposed generalised energy conservation (GEC) condition. At leading order in the soft limit, the dS S-matrices for all exceptional EFTs exhibit no scaling with the soft momentum, i.e. $\lim_{k\rightarrow 0}\mathcal{A}(k)\sim\mathcal{O}(1)$, a feature we term USB. We specifically show that USB fixes the four-poin…

💵 It’s time to pay the true value of tropical forest conservation (commentary)
https://news.mongabay.com/2025/06/its-time-to-pay-the-true-value-of-tropical-forest-conservation-commentary/

It’s time to pay the true value of tropical forest conservation (commentary)
Tropical forests help regulate the global climate, host irreplaceable biodiversity and provide fresh water resources. Plus forests in general are the source of livelihoods for more than a billion people — so our very existence depends on them. However, because their value is not reflected in markets, these areas are often converted to other uses. Conserving our tropical forests […]

"Study highlights dangers of declaring conservation success too soon"
#Animals #Conservation

Study highlights dangers of declaring conservation success too soon
The IUCN Red List has long been the globally recognized gauge for assessing how close to extinction a given species is. An improvement in the species’ conservation status from a higher to a lower threat category, known as downlisting, can signal conservation success. But a recent study says this must be done cautiously to avoid […]

Application of association rule mining to assess forest species distribution in Italy considering abiotic and biotic factors
Valeria Aloisi, Sergio Noce, Italo Epicoco, Cristina Cipriano, Massimo Cafaro, Giuseppe Brundu, Lorenzo Arcidiaco, Donatella Spano, Giovanni Aloisio, Simone Mereu
https://arxiv.org/abs/2508.07076

Application of association rule mining to assess forest species distribution in Italy considering abiotic and biotic factors
Biodiversity monitoring represents a pressing global priority, and assessing forest community composition plays a crucial role due to its influence on ecosystem functions. The spatial distribution of forest species becomes essential for understanding biodiversity dynamics, territorial planning, aiding nature conservation and enhancing ecosystem resilience amid global change. Association Rule Mining, commonly applied to other scientific contexts, is now innovatively adopted in the ecological fie…

An Analysis of the Riemann Problem for a $2 \times 2$ System of Keyfitz-Kranzer Type Conservation Laws Using Shadow Waves and Dafermos Regularization
Josh Culver, Aubrey Ayres, Evan Halloran, Ryan Lin, Emily Peng, Charis Tsikkou
https://arxiv.org/abs/2508.05927

An Analysis of the Riemann Problem for a $2 \times 2$ System of Keyfitz-Kranzer Type Conservation Laws Using Shadow Waves and Dafermos Regularization
We consider a system of two conservation laws and provide a detailed description of both classical and non-classical self-similar Riemann solutions. In particular, we demonstrate the existence of overcompressive delta shocks as singular limits of the Dafermos regularization of the system. The system is chosen for its minimal yet representative structure, which captures the essential features of transport dynamics under density constraints. Our analysis is carried out using blow-up techniques wi…

Invariant Reduction for Partial Differential Equations. III: Poisson brackets
Kostya Druzhkov
https://arxiv.org/abs/2507.08213 https://

Invariant Reduction for Partial Differential Equations. III: Poisson brackets
We show that, under suitable conditions, finite-dimensional systems describing invariant solutions of partial differential equations (PDEs) inherit local Hamiltonian operators through the mechanism of invariant reduction, which applies uniformly to point, contact, and higher symmetries. The inherited operators endow the reduced systems with Poisson bivectors that relate constants of motion to symmetries. Applying the same mechanism to invariant conservation laws, we further show that the induce…

Dynamics of binding three independent ligands to a single scaffold
Eduardo D. Sontag
https://arxiv.org/abs/2508.06599 https://arxiv.org/pdf/2508.06599

Dynamics of binding three independent ligands to a single scaffold
This note considers a system in which three ligands can independently bind to a scaffold. Such systems arise in diverse applications, including immunotherapy and synthetic biology. It is shown that there are unique steady states in each conservation class, and these are asymptotically stable. The dependency of the steady-state amount of fully bound complex, as a function of total scaffold, is analyzed as well.

Neural Transformer Backflow for Solving Momentum-Resolved Ground States of Strongly Correlated Materials
Lixing Zhang, Di luo
https://arxiv.org/abs/2509.09275 https://

Neural Transformer Backflow for Solving Momentum-Resolved Ground States of Strongly Correlated Materials
Strongly correlated materials, such as twisted transition-metal dichalcogenide homobilayers, host a variety of exotic quantum phases but remain notoriously difficult to solve due to strong interactions. We introduce a powerful neural network ansatz, Neural Transformer Backflow (NTB), formulated within a multi-band projection framework. It naturally enforces momentum conservation and enables efficient calculations of momentum-resolved ground states. NTB attains high accuracy on small systems and…

Conservation laws, a new class of group invariant solutions, and its applications for the Whitham Broer Kaup model
Sougata Mandal, Sukhendu Ghosh
https://arxiv.org/abs/2508.06369

Conservation laws, a new class of group invariant solutions, and its applications for the Whitham Broer Kaup model
The Whitham Broer Kaup (WBK) equations provide a fundamental framework for modeling shallow water wave dynamics, effectively capturing both nonlinear and dispersive effects. In this study, we construct a new class of analytical and numerical solutions for the WBK system using Lie symmetry analysis. By determining an optimal system of one-dimensional subalgebras, we obtain symmetry reductions that lead to new kinds of exact wave solutions expressed in hyperbolic, trigonometric, and rational form…

Hyperuniformity and conservation laws in non-equilibrium systems
Rapha\"el Maire, Ludivine Chaix
https://arxiv.org/abs/2509.04242 https://arxiv.org/pd…

Hyperuniformity and conservation laws in non-equilibrium systems
We demonstrate that hyperuniformity, the suppression of density fluctuations at large length scales, emerges generically from the interplay between conservation laws and non-equilibrium driving. The underlying mechanism for this emergence is analogous to self-organized criticality. Based on this understanding, we introduce four non-equilibrium models that consistently demonstrate hyperuniformity. Furthermore, we show that systems with an arbitrary number of conserved mass multipole moments exhi…

Influence of Stretching Boundary Conditions on Fracture in Phantom Star Polymer Networks: From Volume to Cross-sectional Area Conservation
Yuichi Masubuchi, Takato Ishida, Yusuke Koide, Takashi Uneyama
https://arxiv.org/abs/2509.01844

Influence of Stretching Boundary Conditions on Fracture in Phantom Star Polymer Networks: From Volume to Cross-sectional Area Conservation
This study systematically investigates the effect of stretching boundary conditions, ranging from conservation of cross-sectional area to conservation of volume, on the rupture behavior of phantom star polymer networks using energy-minimizing coarse-grained molecular simulations. By continuously varying the deformation parameter, the simulations reveal that true stress and rupture characteristics, such as strain and stress at break and work for rupture, systematically decrease as the boundary c…

Current problems of studying relativistic dissociation of light nuclei in nuclear emulsion
D. A. Artemenkov, N. K. Kornegrutsa, N. Marimuthu, N. G. Peresadko, V. V. Rusakova, A. A. Zaitsev, P. I. Zarubin, I. G. Zarubina
https://arxiv.org/abs/2509.09636

Current problems of studying relativistic dissociation of light nuclei in nuclear emulsion
The progress of the study of unstable states in relativistic dissociation events of light nuclei in nuclear emulsion is presented. Identification of these states is possible by means of the invariant mass determined from the most accurate and complete measurements of relativistic fragment emission angles in the approximation of conservation of momentum per nucleon of the parent nucleus. It is established that excitations $^{12}\mathrm{C}(0^{+}_{2})$ and $^{12}\mathrm{C}(3^{-})$ lead in the diss…

Learning Agile Tensile Perching for Aerial Robots from Demonstrations
Kangle Yuan, Atar Babgei, Luca Romanello, Hai-Nguyen Nguyen, Ronald Clark, Mirko Kovac, Sophie F. Armanini, Basaran Bahadir Kocer
https://arxiv.org/abs/2507.06172

Learning Agile Tensile Perching for Aerial Robots from Demonstrations
Perching on structures such as trees, beams, and ledges is essential for extending the endurance of aerial robots by enabling energy conservation in standby or observation modes. A tethered tensile perching mechanism offers a simple, adaptable solution that can be retrofitted to existing robots and accommodates a variety of structure sizes and shapes. However, tethered tensile perching introduces significant modelling challenges which require precise management of aerial robot dynamics, includi…

Constraining Active Galactic Nucleus Jets with Spectrum and Core Shift: The Case of M87
Kouichi Hirotani, Hsien Shang, Ruben Krasnopolsky, Satoki Matsushita, Britton Jeter, Keiichi Asada
https://arxiv.org/abs/2508.06158

Constraining Active Galactic Nucleus Jets with Spectrum and Core Shift: The Case of M87
We analytically model stationary and axisymmetric active galactic nucleus jets, assuming energy conservation along each magnetic flux tube. Using very-long-baseline interferometry (VLBI) observations and published general relativistic magnetohydrodynamic simulations, we constrain the evolution of the bulk Lorentz factor, the magnetization parameter, and the magnetic field strength along the jet. We then infer the electron density, emission coefficient, and absorption coefficient at each point, …

Testing Spillovers in Resource Conservation: Evidence from a Natural Field Experiment
Lorenz Goette, Zhi Hao Lim
https://arxiv.org/abs/2508.04371 https://a…

Testing Spillovers in Resource Conservation: Evidence from a Natural Field Experiment
This paper studies the potential for behavioral interventions aimed at promoting resource conservation within one domain to induce spillovers in another. Through a large-scale natural field experiment involving around 2,000 residents, we assess the direct and spillover effects of real-time feedback and social comparisons on water and energy consumption. Three interventions were implemented: two targeting shower use and one targeting air-conditioning use. We document a significant reduction in s…

"‘We’re winning a battle’: Mexico’s jaguar numbers up 30% in conservation drive"
#Mexico #Jaguar #Animals

Preliminary orbits with over-determined systems of Keplerian conservation laws
Clara Grassi, Giovanni Federico Gronchi
https://arxiv.org/abs/2507.20709 https://

Preliminary orbits with over-determined systems of Keplerian conservation laws
We consider different choices of Keplerian conservation laws for the computation of preliminary orbits with two very short arcs (VSAs) of astrometric observations. In total we have 7 equations in 4 unknowns. Adding two auxiliary variables we can embed the full set of conservation laws into a polynomial system of 9 equations. This complete system generically has no solutions. However, combining these equations, in [10] the authors found an over-determined polynomial system that is consistent, an…

Paired Explicit Relaxation Runge-Kutta Methods: Entropy-Conservative and Entropy-Stable High-Order Optimized Multirate Time Integration
Daniel Doehring, Hendrik Ranocha, Manuel Torrilhon
https://arxiv.org/abs/2507.04991

Paired Explicit Relaxation Runge-Kutta Methods: Entropy-Conservative and Entropy-Stable High-Order Optimized Multirate Time Integration
We present novel entropy-conservative and entropy-stable multirate Runge-Kutta methods based on Paired Explicit Runge-Kutta (P-ERK) with relaxation for conservation laws and related systems of partial differential equations. Optimized schemes up to fourth-order of accuracy are derived and validated in terms of order of consistency, conservation of linear invariants, and entropy conservation/stability. We demonstrate the effectiveness of these P-ERRK methods when combined with a high-order, entr…

Multiplicity distributions in QCD jets and jet topics
Xiang-Pan Duan, Lin Chen, Guo-Liang Ma, Carlos A. Salgado, Bin Wu
https://arxiv.org/abs/2509.06158 https://

Multiplicity distributions in QCD jets and jet topics
We evaluate the Koba--Nielsen--Olesen (KNO) scaling functions for quark- and gluon-initiated jets by incorporating energy conservation into the Double Logarithmic Approximation (DLA). The resulting modified DLA (MDLA) expressions differ substantially from the DLA predictions and qualitatively align with the recently proposed QCD-inspired expressions, albeit with some quantitative differences. By fixing the two parameters in the MDLA expressions, we show that the inclusive charged-particle multi…

Feynman paradox induced by vacuum and thermal fluctuations
Svend-Age Biehs, Ivan Latella
https://arxiv.org/abs/2509.08711 https://arxiv.org/pdf/2509.08711

Feynman paradox induced by vacuum and thermal fluctuations
A charged particle initially at rest in an external magnetic field starts to rotate when the magnetic field is switched off. This is a variant of the Feynman disc paradox, where the conservation of angular momentum is seemingly violated. The paradox is understood by realizing that angular momentum is initially stored in the electromagnetic field and is transferred to the particle when the magnetic field is removed. In a classical description, no rotation occurs if the particle is uncharged, as …

Symmetry-protected conservation of superhorizon inflationary perturbations to all loops
Cheng-Jun Fang, Zhen-Hong Lyu, Chao Chen, Zong-Kuan Guo
https://arxiv.org/abs/2507.00077

Symmetry-protected conservation of superhorizon inflationary perturbations to all loops
We demonstrates that the single-field inflation field system exhibits a symmetry that constrains its evolution via the Ward identity even for non-attractor inflation. By analyzing loop diagram structures, we derive a superhorizon conserved quantity directly related to the two-point correlation function of curvature perturbations, generalizing previous one-loop results to arbitrary loop orders. This symmetry-based approach provides a framework for understanding quantum conservation laws beyond t…

The quantitative behavior of $\alpha$-Yang-Mills-Higgs fields on surfaces
Wanjun Ai, Jiayu Li, Miaomiao Zhu
https://arxiv.org/abs/2509.06380 https://arxiv.…

The quantitative behavior of $α$-Yang-Mills-Higgs fields on surfaces
We investigate the blow-up behavior of $α$-Yang--Mills--Higgs ($α$-YMH) fields over closed Riemannian surfaces with the target fiber $F = S^{K-1} \subset \mathbb{R}^K$ being the round sphere, focusing on the establishment of the $α$-energy identity and the no-neck property during the bubbling process. A central innovation is the identification of a hidden Jacobian structure through Hodge decomposition and a new conservation law. Furthermore, we derive a Pohozaev-type identity for $α$-YMH fi…

A Unified Framework for Cultural Heritage Data Historicity and Migration: The ARGUS Approach
Lingxiao Kong, Apostolos Sarris, Miltiadis Polidorou, Victor Klingenberg, Vasilis Sevetlidis, Vasilis Arampatzakis, George Pavlidis, Cong Yang, Zeyd Boukhers
https://arxiv.org/abs/2509.06044

A Unified Framework for Cultural Heritage Data Historicity and Migration: The ARGUS Approach
Cultural heritage preservation faces significant challenges in managing diverse, multi-source, and multi-scale data for effective monitoring and conservation. This paper documents a comprehensive data historicity and migration framework implemented within the ARGUS project, which addresses the complexities of processing heterogeneous cultural heritage data. We describe a systematic data processing pipeline encompassing standardization, enrichment, integration, visualization, ingestion, and publ…

"While crop seed vaults are common around the world, nurseries for wild and native plants are rare, and many plant species quietly become extinct. This marks #Gurukula out as a Noah’s ark for endangered plant species."

Quasi-continuum approximations for nonlinear dispersive waves in general discrete conservation laws
Su Yang
https://arxiv.org/abs/2509.04630 https://arxiv.…

Quasi-continuum approximations for nonlinear dispersive waves in general discrete conservation laws
In this paper, we study a non-integrable discrete lattice model which is a variant of an integrable discretization of the standard Hopf equation. Interestingly, a direct numerical simulation of the Riemann problem associated with such a discrete lattice shows the emergence of both the dispersive shock wave (DSW) and rarefaction wave (RW). We propose two quasi-continuum models which are represented by partial differential equations (PDEs) in order to both analytically and numerically capture the…

Generalized variational principle for an accelerated pressureless gas model
Mack Dowell Komba Moudoumou, Fulgence Eyi Obiang, Octave Moutsinga
https://arxiv.org/abs/2509.07207 h…

Generalized variational principle for an accelerated pressureless gas model
We examine a discrete model of sticky particles initially subjected to acceleration. We propose a novel generalized variational principle for characterizing clusters (i.e., particle agglomerations) under decreasing acceleration function. This accelerated particle model is usually employed to solve a system of forced (inhomogeneous) pressureless gas equations. The momentum conservation law requires evaluating the force acting on the gas particles. Here, we present a new solution to this system o…

If you’d like U.S. forest lands to remain unpaved, speak now or forever hold your peace. 
U.S. Secretary of Agriculture Brooke Rollins just opened a 21-day public comment period on her proposal to ❌ rescind the Roadless Area Conservation Rule,
which has safeguarded 58 million acres of undeveloped national forest land from development and logging since 2001. 
Public lands at risk include 635,000 acres of “some of the most remote and ecologically intact landscapes in Los Padr…

Public Invited to Comment on Paving Los Padres National Forest
Forest Service accepting comments on rollback of Roadless Area Conservation Rule that protects undeveloped forest lands.

Geometric Invariants of Quantum Metrology
Christopher Wilson, John Drew Wilson, Luke Coffman, Shah Saad Alam, Murray J. Holland
https://arxiv.org/abs/2507.06128

Geometric Invariants of Quantum Metrology
We establish a previously unexplored conservation law for the Quantum Fisher Information Matrix (QFIM) expressed as follows; when the QFIM is constructed from a set of observables closed under commutation, i.e., a Lie algebra, the spectrum of the QFIM is invariant under unitary dynamics generated by these same operators. Each Lie algebra therefore endows any quantum state with a fixed "budget" of metrological sensitivity -- an intrinsic resource that we show, like optical squeezing in interfero…

Numerical approximations to statistical conservation laws for scalar hyperbolic equations
Qian Huang, Christian Rohde
https://arxiv.org/abs/2509.05039 https://

Numerical approximations to statistical conservation laws for scalar hyperbolic equations
Motivated by the statistical description of turbulence, we study statistical conservation laws in the form of kinetic-type PDEs for joint probability density functions (PDFs) and cumulative distribution functions (CDFs) associated with solutions of scalar balance laws. Starting from viscous balance laws, the resulting PDF/CDF equations involve unclosed conditional averages arising in the viscous terms. We show that these terms exhibit a dissipative anomaly: they remain non-negligible in the van…

"Jaguar cub born in Argentina’s Gran Chaco after three decades"
#Argentina #Jaguars #Animals

Jaguar cub born in Argentina’s Gran Chaco after three decades
A 5-month-old jaguar cub has been spotted along the Bermejo River in northern Argentina’s Gran Chaco region — the first wild-born cub in the region following a rewilding program at El Impenetrable National Park led by conservation nonprofit Rewilding Argentina. Researchers had suspected a birth several months prior, finding paw prints and other indirect signs, […]

Corporate effects of protecting biodiversity comes with price tag, study finds #environment

Corporate effects of protecting biodiversity comes with price tag, study finds
What happens when a national park or conservation area is created next to a business that emits toxic substances into the environment?

Mass conservation analysis of extrusion-based 3D printing simulations based on the level-set method
Carlos J. G. Rojas, C. A. G\'omez-P\'erez, Leyla \"Ozkan
https://arxiv.org/abs/2508.20617

Mass conservation analysis of extrusion-based 3D printing simulations based on the level-set method
Numerical simulations of extrusion-based printing require tracking evolving material bound- aries, a challenging task due to possible topological changes and mass conservation issues. Inaccurate conservation of mass can lead to a mismatch between the extruded and simulated shapes, and generally to unreliable predictions of the actual ink behavior. This work investigates the mass conservation properties of the conservative level-set method in extrusion-based 3D printing applications. We analyze …

Exact Analytical Traversable Wormhole Solutions in Teleparallel $F(T)$ Gravity with the de Rham-Gabadadze-Tolley Massive Graviton Sector
Alexandre Landry, Yassine Sekhmani, Emmanuel N. Saridakis, Sunil K Maurya, Akram Ali
https://arxiv.org/abs/2508.06290

Exact Analytical Traversable Wormhole Solutions in Teleparallel $F(T)$ Gravity with the de Rham-Gabadadze-Tolley Massive Graviton Sector
In this paper, we derive a novel class of exact, static, spherically symmetric traversable wormhole solutions in teleparallel $F(T)$ gravity augmented by the non-linear de Rham-Gabadadze-Tolley (dRGT) graviton mass term. By using the Morris-Thorne ansatz with a generalized redshift function including constant, logarithmic, and power-law profiles, we rigorously integrate the dRGT-modified conservation laws together with the teleparallel field equations to reconstruct both the shape function $b(r…

Integrability from a Single Conservation Law in Quantum Spin Chains
Akihiro Hokkyo
https://arxiv.org/abs/2508.20713 https://arxiv.org/pdf/2508.20713…

Integrability from a Single Conservation Law in Quantum Spin Chains
We prove that for quantum spin chains with finite-range interactions, the existence of a specific conservation law known as the Reshetikhin condition implies the presence of infinitely many local conserved quantities, i.e., integrability. This shows that the entire hierarchy of conservation laws associated with solutions of the Yang--Baxter equation is already encoded in the lowest nontrivial conservation law. Combined with recent rigorous results on nonintegrability, our theorem strongly restr…

A unifying approach to self-organizing systems interacting via conservation laws
Frank Barrows, Guanming Zhang, Satyam Anand, Zizi Chen, Jonathan Lin, Amman Desai, Stefano Martiniani, Francesco Caravelli
https://arxiv.org/abs/2507.02575

A unifying approach to self-organizing systems interacting via conservation laws
We present a unified framework for embedding and analyzing dynamical systems using generalized projection operators rooted in local conservation laws. By representing physical, biological, and engineered systems as graphs with incidence and cycle matrices, we derive dual projection operators that decompose network fluxes and potentials. This formalism aligns with principles of non-equilibrium thermodynamics and captures a broad class of systems governed by flux-forcing relationships and local c…

Front Tracking for Scalar Conservation Laws with Spatially Heterogeneous Flux
Parasuram Venkatesh
https://arxiv.org/abs/2508.01814 https://arxiv.org/pdf/25…

Front Tracking for Scalar Conservation Laws with Spatially Heterogeneous Flux
In this article, we propose a novel front tracking scheme for scalar conservation laws with spatially heterogeneous, uniformly convex flux and demonstrate that the approximations converge to the entropy solution. The main tools we employ are Dafermos' generalised characteristics and Kruzkov's entropies.

"WWF rethinks conservation after a crisis of its own making"
#WWF #Conservation
https:…

WWF rethinks conservation after a crisis of its own making
Founder’s Briefs: An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. In the world of conservation, good intentions have not always made for good outcomes. The World Wide Fund for Nature (WWF), one of the most recognizable environmental organizations on the planet, learned this the hard way. In 2019, […]

Onsager Principle-Based Domain Embedding for Thermodynamically Consistent Cahn-Hilliard Model in Arbitrary Domain
Wenkai Yu, Qi Wang, Zhen Zhang, Tiezheng Qian
https://arxiv.org/abs/2508.06830

Onsager Principle-Based Domain Embedding for Thermodynamically Consistent Cahn-Hilliard Model in Arbitrary Domain
The original Cahn-Hilliard model in an arbitrary domain with two prescribed boundary conditions is extended to a Cahn-Hilliard-type model in a larger, regular domain with homogeneous Neumann boundary conditions. The extension is based on the Onsager principle-based domain embedding (OPBDE) method, which has been developed as a systematic domain embedding framework to ensure thermodynamic consistency. By introducing a modified conservation law, the flux at the boundary of the original domain is …

Quantum phase sensing with states out of thermal equilibrium
Benjamin Yadin
https://arxiv.org/abs/2507.06030 https://arxiv.org/pdf/25…

Quantum phase sensing with states out of thermal equilibrium
Interferometry can be viewed generally as the measurement of a relative phase between two subsystems. I consider the problem of interfering a quantum resource state with a thermal bath, drawing a precise connection between the athermality of the resource and the resulting phase sensitivity. This is done by finding the fundamental sensing precision limit under the minimal conditions of global unitarity and energy conservation. The results here apply both to general finite-dimensional systems and…

"New Coral Reef Protection Technology to Transform Global Conservation"
#Coral #CoralReef #Environment

New Coral Reef Protection Technology to Transform Global Conservation | Happy Eco News
New coral reef protection technology will transform coral reef protection as an international partnership expands to cover 90% of the world's reefs. Saudi Arabia will direct the International Coral Reef Initiative and implementing advanced coral reef protection technology alongside proven conservation methods to safeguard these vital ocean ecosystems.

New scientific analysis determines there are four distinct species of giraffe #science

There are actually four giraffe species in Africa, scientists say
Giraffes are now classified into four distinct species in Africa. Researchers previously thought all giraffes belonged to a single species. On Thursday, a task force of the International Union for Conservation of Nature identified Northern, reticulated, Masai, and Southern giraffes as separate species. This change is based on genetic studies and anatomical differences. Each species faces unique threats and conservation needs. Northern giraffes are the most endangered, with only about 7,000 left…

Topological Conservation Laws in Magnetohydrodynamics on Higher-Dimensional Riemannian Manifolds
Naoki Sato, Ken Abe, Michio Yamada
https://arxiv.org/abs/2506.13251

Topological Conservation Laws in Magnetohydrodynamics on Higher-Dimensional Riemannian Manifolds
Are conservation laws such as fluid enstrophy, fluid helicity, or magnetic helicity inherently tied to the geometry of Euclidean space or the dimensionality of a fluid system? In this work, we first derive the equations of ideal magnetohydrodynamics (MHD) on a general Riemannian manifold. We then demonstrate that the associated conservation laws arise not from the flatness of the metric, but rather from the intrinsic mathematical structure of the governing equations. Moreover, we demonstrate th…

Dynamic Models for Two Nonreciprocally Coupled Fields: A Microscopic Derivation for Zero, One, and Two Conservation Laws
Kristian Blom, Uwe Thiele, Alja\v{z} Godec
https://arxiv.org/abs/2507.01105

Dynamic Models for Two Nonreciprocally Coupled Fields: A Microscopic Derivation for Zero, One, and Two Conservation Laws
We construct the dynamic models governing two nonreciprocally coupled fields for cases with zero, one, and two conservation laws. Starting from two microscopic nonreciprocally coupled Ising models, and using the mean-field approximation, we obtain closed-form evolution equations for the spatially resolved magnetization in each lattice. For single spin-flip dynamics, the macroscopic equations in the thermodynamic limit are closely related to the nonreciprocal Allen-Cahn equations, i.e. conservat…

Eisenhart-Duval lift, Nonlocal Conservation laws and Painlev\'{e} Analysis in Scalar field Cosmology
Andronikos Paliathanasis
https://arxiv.org/abs/2506.21435

Eisenhart-Duval lift, Nonlocal Conservation laws and Painlevé Analysis in Scalar field Cosmology
We investigate the existence of nonlocal conservation laws for the gravitational field equations of scalar field cosmology in an FLRW background with a dust fluid source. We perform such analysis by using a novel approach for the Eisenhart-Duval lift. It follows that the scalar field potential $V\left( ϕ\right) =α\left( e^{λϕ}+β\right) $ admits nontrivial conservation laws. Furthermore, we employ the Painlevé analysis to examine the integrability of the field equations. For the quintessen…

Error Estimates of Semi-Lagrangian Schemes for Diffusive Conservation Laws
Haruki Takemura
https://arxiv.org/abs/2508.03455 https://arxiv.org/pdf/2508.0345…

Error Estimates of Semi-Lagrangian Schemes for Diffusive Conservation Laws
We present error estimates of the fully semi-Lagrangian scheme with high-order interpolation operators, solving the initial value problems for the one-dimensional nonlinear diffusive conservation laws, including the Burgers equations. We impose certain assumptions on the interpolation operator, which are satisfied by both spline and Hermite interpolations. We establish the convergence rates of $ O(Δt + h^{2 s} / Δt) $ in the $ L^2 $-norm and $ O(Δt + h^{s} / (Δt)^{1/2} + h^{2s} / Δt) $ in …

A Third-Order Weighted Essentially Non-Oscillatory Compact Least-Squares Scheme for Hyperbolic Conservation Laws on Non-Uniform Grids
Jianhua Pana, Luxin Li, Wei-Gang Zeng
https://arxiv.org/abs/2508.02033

A Third-Order Weighted Essentially Non-Oscillatory Compact Least-Squares Scheme for Hyperbolic Conservation Laws on Non-Uniform Grids
A third-order weighted essentially non-oscillatory compact least-squares scheme is developed for the finite volume method on structured curvilinear non-uniform grids. The proposed scheme features compact least-squares reconstruction with optimal linear weights for broad-spectrum accuracy and non-linear weights for essentially non-oscillatory property. Through explicit second-order polynomials given for each control volume, the scheme maintains high accuracy on structured meshes with non-uniform…

What Mountains Provide and Why They Need Protection #Mountains

What Mountains Provide and Why They Need Protection
Humans have the power to harm mountain ecosystems, but also the power to protect them as citizens, consumers, policymakers and tourists.

Nonintegrability of the Fredkin spin chain and its truncated versions
Wen-Ming Fan, Kun Hao, Yang-Yang Chen, Kun Zhang, Xiao-Hui Wang, Vladimir Korepin
https://arxiv.org/abs/2509.04838

Nonintegrability of the Fredkin spin chain and its truncated versions
Conservation laws serve as the hallmark of integrability. The absence of conserved charges typically implies that the model is nonintegrable. The recently proposed Fredkin spin chain exhibits rich structures, and its ground state is analytically known. However, whether the Fredkin spin chain is integrable remains an open question. In this work, through rigorous analytical calculations, we demonstrate that the Fredkin spin chain, under both periodic and open boundary conditions, lacks local cons…

Florida wildlife officials gave preliminary approval for the first black bear hunt since one 10 years ago that was halted early after more than 300 bears were killed in only two days.
The Florida Fish and Wildlife Conservation Commission voted 4-1 at a meeting in Ocala in favor of a bear hunt in December and annually into the future,
allowing the use of up to six dogs to corner the bears.
Methods could include bowhunting, similar to rules for hunting deer, and bear hunting…

Florida gives preliminary approval to controversial black bear hunt amid strong opposition
The Florida Fish and Wildlife Conservation Commission has given preliminary approval for a black bear hunt for December and into the future, which could eventually allow the use of up to six dogs to corner the bears and use of bowhunting. The commission voted 4-1 Wednesday on the proposal, which would be the first bear hunt since 2015 when more than 300 bears were killed in only two days. Hunt supporters say managing bear populations is key to preventing dangerous encounters with humans. Oppone…

$L^2$-contraction and asymptotic stability of large shock for scalar viscous conservation laws
Alexis F. Vasseur, Yi Wang, Jian Zhang
https://arxiv.org/abs/2509.02965 https://…

$L^2$-contraction and asymptotic stability of large shock for scalar viscous conservation laws
We investigate $L^2$-contraction and time-asymptotic stability of large shock for scalar viscous conservation laws with polynomial flux. For the strictly convex flux $f(u)=u^p $ with $2\leq p \leq 4$, we can prove $L^2$-contraction and time-asymptotic stability of arbitrarily large viscous shock profile in $H^1$-framework by using $a$-contraction method with time-dependent shift and suitable weight function. Additionally, if the initial perturbation belongs to $L^1$, then $L^2$ time-asymptotic …

High-Order Schemes for Hyperbolic Conservation Laws Using Young Measures
Shaoshuai Chu, Michael Herty
https://arxiv.org/abs/2509.02107 https://arxiv.org/pd…

High-Order Schemes for Hyperbolic Conservation Laws Using Young Measures
We develop high-order numerical schemes to solve random hyperbolic conservation laws using linear programming. The proposed schemes are high-order extensions of the existing first-order scheme introduced in [{\sc S. Chu, M. Herty, M. Lukáčová-Medvi{\softd}ová, and Y. Zhou}, solving random hyperbolic conservation laws using linear programming], where a novel structure-preserving numerical method using a concept of generalized, measure-valued solutions to solve random hyperbolic systems of co…

Hybrid Compact Least-Squares and Central Weighted Essentially Non-Oscillatory Schemes for Hyperbolic Conservation Laws on Structured Curvilinear Grids
Jianhua Pan, Luxin Li, Ji Yin, Wei-Gang Zeng
https://arxiv.org/abs/2508.02042

Hybrid Compact Least-Squares and Central Weighted Essentially Non-Oscillatory Schemes for Hyperbolic Conservation Laws on Structured Curvilinear Grids
A series of third- and fifth-order hybrid compact least-squares central weighted essentially non-oscillatory schemes are proposed and applied to curvilinear structured grids for the finite volume method. In smooth regions, compact least-squares schemes based on interfacial differences of derivatives are utilized to keep the high resolution of multiscale structures, whereas in discontinuous regions, central weighted essentially non-oscillatory schemes are included to enable the oscillation free …

"Advanced Whale Communication Technology Could Reshape Conservation Efforts"
#Whales #Animals #Conservation

Advanced Whale Communication Technology Could Reshape Conservation Efforts | Happy Eco News
Whale communication technology is advancing rapidly as Project CETI works to translate sperm whale vocalizations in the Caribbean. This technology could transform animal rights law, prevent ship collisions, protect critical habitats, and provide insights into marine ecosystems, while challenging assumptions about the fundamental differences between humans and animals.

Newman-Penrose-like exact and approximate conservation laws: a covariant and conformal formulation
Berend Schneider
https://arxiv.org/abs/2507.02237 https:…

Newman-Penrose-like exact and approximate conservation laws: a covariant and conformal formulation
Using a conformal extension of the Geroch-Held-Penrose (GHP) formalism I derive a manifestly covariant and conformal expression of Newman-Penrose (NP) constants, which are a set of conserved quantities associated to solutions to the wave equation on light cones in Minkowski space. The resulting expression generalizes to massless fields of arbitrary spin -- including the electromagnetic field, Weyl fermions, and the linearized Weyl tensor -- on conformally flat space-times. In some non-conformal…

Nonlocal conservation laws for the two-dimensional Euler equation in vorticity form
Oleg I. Morozov
https://arxiv.org/abs/2507.22578 https://arxiv.org/pdf/…

Nonlocal conservation laws for the two-dimensional Euler equation in vorticity form
We combine the construction of the canonical conservation law and the nonlocal cosymmetry to derive a collection of nonlocal conservation laws for the two-dimensional Euler equation in vorticity form. For computational convenience and simplicity of presentation of the results we perform a complex rotation of the independent variables.

Energy-conserving Kansa methods for Hamiltonian wave equations
Xiaobin Li, Meng Chen, Zhengjie Sun, Leevan Ling, Siqing Li
https://arxiv.org/abs/2507.04361

Energy-conserving Kansa methods for Hamiltonian wave equations
We introduce a fast, constrained meshfree solver designed specifically to inherit energy conservation (EC) in second-order time-dependent Hamiltonian wave equations. For discretization, we adopt the Kansa method, also known as the kernel-based collocation method, combined with time-stepping. This approach ensures that the critical structural feature of energy conservation is maintained over time by embedding a quadratic constraint into the definition of the numerical solution. To address the co…

"New list of primates in peril aims to focus attention and inspire action"
#Primates #Animals

New list of primates in peril aims to focus attention and inspire action
ANTANANARIVO — For more than six decades, the International Primatological Society (IPS) has brought scientists, conservationists and educators from around the world together every two years to exchange ideas and drive primate research and conservation. The 30th IPS Congress welcomed nearly 800 participants from around the world to Madagascar, the “Land of Lemurs.” It’s a […]

Breaking conservation law enables steady-state entanglement out of equilibrium
Vince Hou, Eric Kleinherbers, Shane P. Kelly, Yaroslav Tserkovnyak
https://arxiv.org/abs/2508.18131

Breaking conservation law enables steady-state entanglement out of equilibrium
We show how entangled steady states can be prepared by purely dissipative dynamics in a system coupled to a thermal environment. While entanglement is hindered by thermalization when the system and environment exchange a conserved quantity, we demonstrate that breaking this conservation law through the system-environment interaction drives the system to a nonequilibrium steady state. Such an interaction will generate multiple competing equilibration channels, effectively mimicking baths at dist…

Blue cranes now listed as vulnerable in South Africa https://news.mongabay.com/short-article/2025/07/blue-cranes-now-listed-as-vulnerable-in-south-africa/

Blue cranes now listed as vulnerable in South Africa
The blue crane, South Africa’s national bird, is now at greater risk of extinction, as a new regional assessment lists the species as “vulnerable.” “A Near-Threatened listing is no longer appropriate, now that the population is declining,” states the recently published Red Data Book of Birds, which follows the International Union for Conservation of Nature […]

"Can we undo extinction? A growing effort to restore lost sharks"
#Sharks #Animals #Conservation

Can we undo extinction? A growing effort to restore lost sharks
Founder’s Briefs: An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. In the turquoise shallows of Raja Ampat, Indonesia, a conservation experiment is attempting the rewilding of an endangered shark. The initiative, known as ReShark, seeks to restore populations of the Indo-Pacific leopard shark (Stegostoma tigrinum), also called the […]

A Fully Discrete Truly Multidimensional Active Flux Method For The Two-Dimensional Euler Equations
Erik Chudzik, Christiane Helzel, Amelie Porfetye
https://arxiv.org/abs/2508.06273

A Fully Discrete Truly Multidimensional Active Flux Method For The Two-Dimensional Euler Equations
The Active Flux method is a finite volume method for hyperbolic conservation laws that uses both cell averages and point values as degrees of freedom. Several versions of such methods are currently under development. We focus on third order accurate, fully discrete Active Flux methods with compact stencil in space and time. These methods require exact or approximate evolution operators for the update of the point value degrees of freedom which are provided by the method of bicharacteristics. He…

Infinite BV, large $L^\infty$ solutions of conservation laws are H\"older-stable in $L^2$ in the class of front tracking limits
Geng Chen (University of Kansas), Cooper Faile (The University of Texas at Austin), Sam G. Krupa (\'Ecole normale sup\'erieure)
https://arxiv.org/abs/2507.23645…

Infinite BV, large $L^\infty$ solutions of conservation laws are Hölder-stable in $L^2$ in the class of front tracking limits
We consider hyperbolic systems of conservation laws in one spatial dimension. For any limit of front tracking solutions $v$, and for a general weak solution $u\in L^\infty$ with no BV assumption, we prove the following Hölder-type stability estimate in $L^2$: $$||u(\cdot,τ)-v(\cdot,τ)||_{L^2} \leq K \sqrt{||u( \cdot,0)-v( \cdot,0)||_{L^2}}$$ for all $τ$ without smallness and for a universal constant $K$. Our result holds for all limits of front tr…

"To save a rare South African ecosystem, conservationists bought the land"
#SouthAfrica #Conservation #Environment

To save a rare South African ecosystem, conservationists bought the land
Three conservation trusts have together purchased an area of a severely threatened vegetation type found in the Overberg region of South Africa’s Western Cape province. Known as the renosterveld, this unique habitat characterized by shrubs and grasses is also a breeding ground for endangered black harriers, the three groups announced in a joint press release. […]

Neural Entropy-stable conservative flux form neural networks for learning hyperbolic conservation laws
Lizuo Liu, Lu Zhang, Anne Gelb
https://arxiv.org/abs/2507.01795

Neural Entropy-stable conservative flux form neural networks for learning hyperbolic conservation laws
We propose a neural entropy-stable conservative flux form neural network (NESCFN) for learning hyperbolic conservation laws and their associated entropy functions directly from solution trajectories, without requiring any predefined numerical discretization. While recent neural network architectures have successfully integrated classical numerical principles into learned models, most rely on prior knowledge of the governing equations or assume a fixed discretization. Our approach removes this d…

"Giant river otter returns to Argentina after almost four decades"
#Argentina #Otters #Animals

Giant river otter returns to Argentina after almost four decades
A family of giant river otters was released into the Iberá National Park in northeast Argentina on July 1. The endangered species, with no known breeding populations in Argentina over the past 40 years, was considered probably extinct in the country. The release, led by conservation nonprofit Rewilding Argentina, included a breeding pair named Coco […]

Global Existence, Hamiltonian Conservation and Vanishing Viscosity for the Surface Quasi-Geostrophic Equation
Luigi De Rosa, Micka\"el Latocca, Jaemin Park
https://arxiv.org/abs/2509.01268

Global Existence, Hamiltonian Conservation and Vanishing Viscosity for the Surface Quasi-Geostrophic Equation
For any initial datum $θ_0\in L^{\frac{4}{3}}_x$ it is proved the existence of a global-in-time weak solution $θ\in L^\infty_t L^{\frac43}_x$ to the surface quasi-geostrophic equation whose Hamiltonian, i.e. the $\dot{H}^{-\frac{1}{2}}_x$ norm, is constant in time. The solution is obtained as a vanishing viscosity limit. Outside the classical strong compactness setting, the main idea is to propagate in time the non-concentration of the $L^{\frac{4}{3}}_x$ norm of the initial data, from which …

"Solar farms and sheep grazing show how farming and clean energy can share land"
#SolarPower #Energy #Renewables

Solar farms and sheep grazing show how farming and clean energy can share land
Solar panels now double as shade for sheep and a tool for rural energy production in Georgia, where some farmers are balancing land conservation with renewable energy development.Emily Jones reports for Grist.In short:A solar farm in Lee County, Georgia, uses sheep for vegetation control, allowing t...

On the regularity of continuous solutions to multidimensional scalar conservation laws with bounded source
Fabio Ancona, Laura Caravenna, Alexander J. Cliffe, Elio Marconi
https://arxiv.org/abs/2509.00977

On the regularity of continuous solutions to multidimensional scalar conservation laws with bounded source
We prove the Hölder regularity of continuous isentropic solutions to multi-dimensional scalar balance laws when the source term is bounded and the flux satisfies general assumptions of nonlinearity. The results are achieved by exploiting the kinetic formulation of the balance law.

Conservative approximation-based feedforward neural network for WENO schemes
Kwanghyuk Park, Jiaxi Gu, Jae-Hun Jung
https://arxiv.org/abs/2507.06190 https:…

Conservative approximation-based feedforward neural network for WENO schemes
In this work, we present the feedforward neural network based on the conservative approximation to the derivative from point values, for the weighted essentially non-oscillatory (WENO) schemes in solving hyperbolic conservation laws. The feedforward neural network, whose inputs are point values from the three-point stencil and outputs are two nonlinear weights, takes the place of the classical WENO weighting procedure. For the training phase, we employ the supervised learning and create a new l…

Error and long-term analysis of two-step symmetric methods for relativistic charged-particle dynamics
Ting Li, Bin Wang, Ruili Zhang
https://arxiv.org/abs/2509.03886 https://

Error and long-term analysis of two-step symmetric methods for relativistic charged-particle dynamics
In this work, we consider the error estimates and the long-time conservation or near-conservation of geometric structures, including energy, mass shell and phase-space volume, for four two-step symmetric methods applied to relativistic charged-particle dynamics. We begin by introducing a two-step symmetric numerical method based on a splitting scheme that exactly preserves the mass shell and the phase-space volume of the relativistic system. Building on this formulation, we develop three additi…

A Family of Block-Centered Schemes for Contaminant Transport Equations with Adsorption via Integral Method with Variational Limit
He Liu, Xiongbo Zheng, Xiaole Li, Mingze Ji
https://arxiv.org/abs/2507.06551

A Family of Block-Centered Schemes for Contaminant Transport Equations with Adsorption via Integral Method with Variational Limit
This paper develops a class of high-order conservative schemes for contaminant transport with equilibrium adsorption, based on the Integral Method with Variational Limit on block-centered grids. By incorporating four parameters, the scheme can reproduce classical fourth-order compact schemes and further extend to sixth- and eighth-order accurate formulations, all within a unified framework. Under periodic boundary conditions, we analyze the stability, convergence, and mass conservation of the p…

"Conservation’s silent strain: Nature’s protectors face a mental health crisis"
#Conservation #Nature

Conservation’s silent strain: Nature’s protectors face a mental health crisis
Founder’s Briefs: An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. Amid the calls of gibbons and the whir of drones scanning forest canopies, a quieter crisis is unfolding within the ranks of those trying to save nature. Conservationists, often seen as tireless stewards of the planet’s dwindling biodiversity, […]

"Conservationist Hail Recovery of 150 Struggling Species Thanks to Projects by Natural England"
#UK #UnitedKingdom #Conservation

Conservationist Hail Recovery of 150 Struggling Species Thanks to Projects by Natural England
its report card has arrived, and its A+ work has seen the recovery of 150 struggling or declining species. 

Model order reduction techniques for the stochastic finite volume method
Ray Qu, Jesse Chan, Svetlana Tokareva
https://arxiv.org/abs/2507.05091 https://

Model order reduction techniques for the stochastic finite volume method
The stochastic finite volume method (SFV method) is a high-order accurate method for uncertainty quantification (UQ) in hyperbolic conservation laws. However, the computational cost of SFV method increases for high-dimensional stochastic parameter spaces due to the curse of dimensionality. To address this challenge, we incorporate interpolation-based reduced order modeling (ROM) techniques that reduce the cost of computing stochastic integrals in SFV method. Further efficiency gains are achieve…

"How Dogs That Protect Penguins Are Saving a Species"
#Penguins #Dogs #Animals

How Dogs That Protect Penguins Are Saving a Species | Happy Eco News
Dogs that protect penguins are helping save the world’s smallest penguin species on Middle Island, Australia. Maremma sheepdogs guard the colony during breeding season, scaring off predators and preventing extinction. This unique conservation approach has revived a once-dying population and inspired similar efforts worldwide. Their story continues to spread hope.

"Nepal launches plan to boost science, awareness to save dholes"
#Nepal #Animals #Dholes

Nepal launches plan to boost science, awareness to save dholes
KATHMANDU — Nepal has launched a species action plan focused exclusively on conserving the endangered dhole (Cuon alpinus), also known as the Asiatic wild dog. The new 262.9 million rupee ($1.9 million) five-year plan, targets key conservation challenges by trying to strike a balance between improving scientific understanding of the species and promoting awareness among […]

A relaxation scheme for the equations of isentropic gas dynamics on a network with jump transmission conditions
Magali Ribot (IDP, MaIAGE, MUSCA), Roberto Natalini (IAC), Maya Briani (IAC)
https://arxiv.org/abs/2507.05779

A relaxation scheme for the equations of isentropic gas dynamics on a network with jump transmission conditions
In this paper we propose a new numerical scheme of relaxation type to approximate the Euler equations of isentropic gas dynamics on the arcs of a network. At the junction mass conservation and a jump transmission condition on the density are given, and a new solver is introduced to deal with both subsonic and supersonic cases. Consistency properties of the solver are proven and numerical tests are displayed to show its good performance also with respect to other possible solvers.

"Malaysia’s turtle egg buyback scheme saved thousands — but is it sustainable?"
#Malaysia #Turtles #Animals

Malaysia’s turtle egg buyback scheme saved thousands — but is it sustainable?
On the moonlit beaches of Terengganu state, on Malaysia’s east coast, green sea turtles have been returning for generations to lay their eggs. For just as long, people have collected, sold and eaten the eggs as a delicacy, supporting coastal livelihoods but stressing turtle populations. As a conservation compromise to balance livelihoods and turtle protection, […]

"New bat species described from Western Himalayas"
#Bats #Animals
https://

New bat species described from Western Himalayas
Researchers reviewing the diversity of bats in the Western Himalayas in India recently confirmed a new-to-science species from Uttarakhand state. Named the Himalayan long-tailed myotis (Myotis himalaicus) in a new study, the bat boasts a tail nearly as long as its body. Rohit Chakravarty, a bat researcher and conservationist with the nonprofit Nature Conservation Foundation, […]

"Blue cranes now listed as vulnerable in South Africa"
#SouthAfrica #Birds
https…

Blue cranes now listed as vulnerable in South Africa
The blue crane, South Africa’s national bird, is now at greater risk of extinction, as a new regional assessment lists the species as “vulnerable.” “A Near-Threatened listing is no longer appropriate, now that the population is declining,” states the recently published Red Data Book of Birds, which follows the International Union for Conservation of Nature […]

"Conservationists raise sharks to restore reefs in waters around Thailand"
#Thailand #Conservation #CoralReef #Shsrks

Conservationists raise sharks to restore reefs in waters around Thailand
KHAO LAK, Thailand — Conservationist Ying Pemika Choovanichchanon holds a small basket in her hands, careful not to disturb the leathery brown pouches nestled inside. When she shines a light underneath, signs of life appear: the pouches are bamboo shark egg cases, and the tiny creatures within them are a key part of a plan […]

"Giraffe is now officially four species"
#Giraffe #Animals
https://news.monga…

Giraffe is now officially four species
The IUCN, the global wildlife conservation authority, now officially recognizes four distinct giraffe species, it announced on Aug. 21. Until recently, giraffes across Africa were classified as a single species with eight to 11 subspecies. However, since 2016, when the giraffe’s threat status was last assessed for the IUCN Red List as vulnerable, several studies […]

"More than 10,000 species on brink of extinction need urgent action: Study"
#Animals #Extinction

More than 10,000 species on brink of extinction need urgent action: Study
Extinction is an overwhelming concept, difficult to grasp in its enormity and finality. Thousands of species are barreling toward that grim fate, unless we help. A comprehensive new study provides the clearest picture yet of Earth’s most imperiled species, and offers evidence that conservation can work. The study published in Nature Reviews Biodiversity found that […]

"Gorilla habitats and pristine forest at risk as DRC opens half of country to oil and gas drilling bids"
#DRC #DemocraticRepublicofCongo #OIl

"Washington State Protects the Old-Growth Forests of Tomorrow, Creates 77,000 Acres of ‘Legacy Forests’"
#US #USA #America #Washington

Washington to Protect the Old-Growth Forests of Tomorrow, Creates 77,000 Acres of 'Legacy Forests'
The legacy forest announcement raises an interesting question for forest management and conservation to consider around the world over.