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Mullin tells Congress primary border wall will be done by June 2027, secondary wall by summer 2028
U.S. Department of Homeland Security Secretary Markwayne Mullin announced on Wednesday the administration is on track to have the primary border wall, from the Pacific to the Gulf of America, completed by June 2027.He added all contracts will be out by the end of this month, noting the department is making "great progress. "Mullin's comments came as he testified before the House Homeland Security Committee about his department's 2027 fiscal year budget. He testified before the Senate...
Mullin tells Congress primary border wall will be done by June 2027, secondary wall by summer 2028
U.S. Department of Homeland Security Secretary Markwayne Mullin announced on Wednesday the administration is on track to have the primary border wall, from the Pacific to the Gulf of America, completed by June 2027.He added all contracts will be out by the end of this month, noting the department is making "great progress. "Mullin's comments came as he testified before the House Homeland Security Committee about his department's 2027 fiscal year budget. He testified before the Senate...
Semi-local transformation for compressible wall turbulence via elliptic equations
arXiv:2606.09322v1 Announce Type: new Abstract: Compressibility and wall heat transfer change the inner scaling of wall turbulence through the mean density and viscosity fields. Existing semi-local transformations usually act on a wall-normal profile after the profile has been chosen. Here the transformed coordinate and transformed velocity are instead defined by elliptic equations before wall-normal profiles are extracted.
Wall Shear Stress Reconstruction from Concentration: Differentiable Physics and Physics-Informed Neural Networks
arXiv:2606.06313v1 Announce Type: cross Abstract: Wall shear stress (WSS) governs near-wall transport dynamics and is a key hemodynamic indicator in cardiovascular flows, yet remains difficult to infer accurately due to the need for precise computation of near-wall velocity gradients. Passive scalar fields, such as concentration or temperature, are advected by the same underlying velocity field and have the potential to uncover hidden flow physics metrics such as WSS. In this work, we...
Wall Shear Stress Reconstruction from Concentration: Differentiable Physics and Physics-Informed Neural Networks
arXiv:2606.06313v1 Announce Type: new Abstract: Wall shear stress (WSS) governs near-wall transport dynamics and is a key hemodynamic indicator in cardiovascular flows, yet remains difficult to infer accurately due to the need for precise computation of near-wall velocity gradients. Passive scalar fields, such as concentration or temperature, are advected by the same underlying velocity field and have the potential to uncover hidden flow physics metrics such as WSS. In this work, we...
Ohio wall lizards overcame genetic bottleneck through rapid population boom, genomes reveal
Ohio wall lizards overcame genetic bottleneck through rapid population boom, genomes reveal Andrew Zinin Lead Editor Non-native wall lizards living in Cincinnati, Ohio, have thrived against the odds thanks to an ability to expand their population more quickly than any inbreeding-amplified harmful genes could weaken their chances for survival, new research suggests. An estimated 10 of these European common wall lizards arrived in southwest Ohio in the 1950s, brought home by a boy who smuggled...
Resistive wall mode induced disruptions in an advanced tokamak
arXiv:2606.02349v1 Announce Type: new Abstract: Resistive wall mode is one of the leading causes for tokamak disruptions above the no-wall $\beta_N$ limit. This paper presents nonlinear three-dimensional resistive MHD simulations of an RWM-induced disruption in a CFETR baseline steady-state equilibrium using the NIMROD code. Linear calculations confirm the dominant presence of the $n=1$ RWM instability, whose growth rate is strongly sensitive to the wall response and becomes weakly dependent...
US to complete Trump's long-promised Mexico border wall by late 2027
US to complete Trump's long-promised Mexico border wall by late 2027 The United States expects to complete construction of President Donald Trump's long-promised southern border wall by late 2027, Customs and Border Protection Commissioner Rodney Scott said on Tuesday. Speaking at an event in Washington, Scott said the reinforced barrier would extend along most of the US-Mexico border, with limited exceptions where officials deemed it unnecessary.
A Wall Function for Turbulent Boundary Layers under Rotation via Symbolic Regression
arXiv:2606.06876v1 Announce Type: new Abstract: This study employs symbolic regression to derive physically interpretable, white-box wall-function expressions for turbulent boundary layers under system rotation. Flows in a rotating frame are subject to Coriolis forces, which deflect the boundary layer profile from static case. The classical law of the wall, formulated under non-rotating conditions, is ill-suited to describing the effects of rotation.
Implementation and Verification of Toroidal Resistive Wall Boundary Conditions in the PIXIE3D MHD code using a Boundary Integral Method
Announce Type: new Abstract: We present the complete formulation of resistive wall boundary conditions in axisymmetric toroidal geometries as implemented in the PIXIE3D extended magnetohydrodynamics (MHD) code, along with a complete suite of analytical verification examples that demonstrate correctness in the implementation. The formulation centers around a thin wall approximation and a Boundary Integral Method to solve for the magnetic scalar potential in the immediately surrounding vacuum....