https://www.matthewliska.com/blog-1 daily 0.75 2021-07-06 https://www.matthewliska.com/blog-1/Blog Post Title One-5b7gl monthly 0.5 2020-08-27 https://www.matthewliska.com/home daily 0.75 2021-07-04 https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1565972871014-J37WVTMYBCREGI4GS0Q4/profile.jpg Home https://www.matthewliska.com/home/northeast-w6d9j monthly 0.5 2019-08-19 https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1566407651732-R4YYGGRLATUK0VP97PXS/Large%2BJPG-20130731_Trade%2B100_0280.jpg Home - Northeast https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563394315349-QX8L29RKW795ZF36H3UV/Large+JPG-20130731_Trade+100_0370.jpg Home - Northeast https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1566407767943-7SYUBNFS7ZPFD99B4Q6I/Large%2BJPG-20130731_Trade%2B100_0328.jpg Home - Northeast Lorem ipsum dolor sit amet, consectetur adipiscing. https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563993547552-1Y789O8TBYA6SGTSJJN4/20130731_Trade+100_0307.jpg Home - Northeast https://www.matthewliska.com/home/southwest-gwwcr monthly 0.5 2019-08-19 https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563387092017-7MP8U1T12V4G7X1GW8GV/Large+JPG-ishimoto1.jpg Home - Southwest https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1566407230192-GQHIWV8F0GL0CFLIVV4A/image-asset.octet-stream Home - Southwest https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1566407320989-J7O1SKHJP1NA0LDWUNMF/Large%2BJPG-EmptyName%2B73.jpg Home - Southwest https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563387993825-5IPQFNJM3JHYFUBD62RM/Large%2BJPG-EmptyName%2B1.jpg Home - Southwest - Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt. https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1566407279335-5NVFO4DSR8I9AFXABBES/Large%2BJPG-EmptyName%2B10.jpg Home - Southwest - Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras mattis consectetur purus sit amet fermentum. https://www.matthewliska.com/home/southeast-9rssw monthly 0.5 2019-08-19 https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1566407530014-YX3F7FTNWK436WODV8KG/image-asset.octet-stream Home - Southeast https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1566407600630-XM5CRIP1HNV8WR84QK28/image-asset.octet-stream Home - Southeast https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563392823186-KP9APFP8S0UEW7CATOED/Large%2BJPG-04_20160720S1_WEATHERBY_ANGLERS_120.jpg Home - Southeast - Friends, Family, Fish. https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563395881523-NJ41BZ9DCN5YGFLQT93V/Large+JPG-06_20160720S1_WEATHERBY_ANGLERS_219.jpg Home - Southeast https://www.matthewliska.com/home/pacific-northwest-l5gk9 monthly 0.5 2019-08-19 https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563386364934-ZOQA6GR6WKE0YP82UQRP/Large%2BJPG-landing-full-topleft-01.jpg Home - Pacific Northwest - Take only memories. Leave nothing but footprints. –Chief Seattle https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563385479517-LKYUJ0IHUGSW6MUJHPAK/Large+JPG-ishimoto13.jpg Home - Pacific Northwest https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563386450723-VFP78VMN672NZKH456FX/Large%2BJPG-Aro%2BHa_0167.jpg Home - Pacific Northwest - Creation’s music. Photo provided by Aro Ha https://images.squarespace-cdn.com/content/v1/5d28a8672179580001e9a780/1563386618190-IZWY18O3G97YYT6P6E3A/image-asset.jpeg Home - Pacific Northwest https://www.matthewliska.com/home-1 daily 1.0 2026-09-22 https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/46a27c4b-99e3-4f4c-9c6e-9435d79d1e67/khushi-taori.jpg https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/a6a436c3-c5f6-4e6e-8c98-2cf865c8ea41/grant-van-gerpen.webp https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/47fe3a9f-e924-446f-ba27-014ce9576b9f/christopher-bambic.jpg https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/d3069bb3-7645-49c2-a22e-9cf2c204fba8/rohan-mahajani.png https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/b9746bd4-335d-4444-b599-1f72dda10eef/unnamed+%282%29.png Home https://www.matthewliska.com/home-1/explosive-transients monthly 0.5 2026-09-22 https://www.matthewliska.com/home-1/project-four-zng9g monthly 0.5 2026-09-22 https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/8d2f69fb-a02b-4b89-999e-80d317db7f57/warped.png Home - Warped Accretion Disks - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.matthewliska.com/home-1/project-four-zng9g-rd5bb monthly 0.5 2026-09-22 https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/e93d1cd7-0dba-4dd0-82d9-b7d919ca6204/AMR.png Home - H-AMR - H-AMR: Adaptive Mesh Refinement H-AMR uses adaptive mesh refinement (AMR) to place resolution where the dynamics demand it. The image shows the mesh around a warped accretion disk in an 80-billion-cell calculation on OLCF Frontier—the largest GRMHD simulation performed to date—run on more than 10,000 GPUs. Nested refinement follows the dense disk while avoiding unnecessary cost in the surrounding volume. Local adaptive timestepping (LAT) complements AMR by allowing larger cells, especially at greater radii on the logarithmic grid, to advance with longer timesteps. This reduces the total number of updates, delivers a factor of 3–8 speedup, and can improve accuracy by reducing noise from repeated primitive-variable inversions. https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/30c11244-c24b-455d-8685-d9de3da23156/neutrino.png Home - H-AMR - H-AMR: Radiation, Neutrinos & Microphysics H-AMR currently couples GRMHD to gray two-moment (M1) radiation transport, allowing radiation energy and momentum to feed back on the gas. We are now developing a Monte Carlo radiation module that follows individual photon packets and retains spectral and angular information, enabling predictive synthetic spectra, light curves, and images across optically thin and thick regimes. For dense merger and collapsar disks, νH-AMR couples GRMHD to two-moment neutrino transport and a Helmholtz equation of state that captures ions, electron–positron pairs, radiation, and nuclear recombination. These ingredients determine cooling, electron fraction, neutronization, and the composition of outflows. Danat Issa’s simulations use this framework to follow magnetically driven collapsars and identify when neutron-rich ejecta can support r-process nucleosynthesis. https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/1625513142869-U35RKCATB0AA4VQU8U2E/grid+%281%29.png Home - H-AMR - H-AMR: Treatment of Pole H-AMR efficiently and accurately handles the polar regions in a spherical grid. H-AMR achieves this by applying transmissive boundary conditions across the pole while using static mesh refinement (SMR) to avoid the squeezing of cells in the azimuthal direction, which would otherwise slow down computational speed by orders of magnitude. For this, H-AMR derefines the grid only in the troublesome azimuthal direction while maintaining the full resolution in the r- and theta-directions. This unique approach makes it possible to resolve features that pass close to the pole. https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/fb948bd3-5f8f-445b-84d4-b00cc578b43f/codex-clipboard-c5263e9e-2b5c-490d-bd00-fe34dc7c3c3f.png Home - H-AMR - H-AMR: Single CPU and GPU Benchmarks H-AMR delivers high single-device throughput across several generations of accelerator hardware. In this non-radiative GRMHD benchmark, the AMD MI300X reaches about 4.5 × 10^8 zone cycles/s, followed by the NVIDIA B200 at roughly 4.1 × 10^8 and the H200 at 3.2 × 10^8. For comparison, the NVIDIA A100 reaches 1.6–1.8 × 10^8 zone cycles/s and the V100 about 1.0 × 10^8. The CPU measurements emphasize the large advantage of modern GPUs, which makes substantially larger and higher-resolution simulations practical. https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/5727118c-f329-4779-a29f-ede0a63a2bb0/HLL+vs+HLLD+%281%29.png Home - H-AMR - H-AMR: Advanced Riemann Solvers H-AMR includes advanced approximate Riemann solvers for relativistic magnetohydrodynamics. The HLLD solver restores the contact discontinuity and Alfvén waves that are collapsed into the more diffusive HLL solution, preserving sharper disk structure and richer magnetized turbulence at a given resolution. The comparison at right shows the stronger small-scale density and plasma-beta structure captured by HLLD. Higher-order spatial reconstruction schemes and higher-order time integrators are under development to further reduce numerical diffusion and improve accuracy in demanding simulations https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/d2afb241-24c6-450e-b958-bef89ef6d7eb/fb8e9f9198d7582a.png Home - H-AMR - CRUX: Topology-Aware Load Balancing CRUX is a topology-aware load balancer designed for the demanding, multiscale meshes used by H-AMR and other GPU fluid codes. It balances mesh blocks with different timestep costs while minimizing communication and accounting for heterogeneous hardware. Benchmarks on up to 5,400 GPUs on OLCF Frontier and ALCF Aurora show better load uniformity, memory use, and communication efficiency than space-filling-curve approaches. https://www.matthewliska.com/home-1/project-four-zng9g-rd5bb-sg2ae monthly 0.5 2026-09-22 https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/eb60657f-f43e-439d-8b8a-082e49e16ee8/x-point-corona.png Home - Accretion Disk Outbursts - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.matthewliska.com/home-1/project-four-zng9g-rd5bb-sg2ae-aehd5 monthly 0.5 2026-09-22 https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/510f0348-bcbc-4948-943c-8b138d94dbb8/07bed331954d4216.png Home - Plasma Microphysics & Radiation - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.matthewliska.com/home-1/project-four-zng9g-rd5bb-sg2ae-aehd5-xz6tx monthly 0.5 2026-09-22 https://www.matthewliska.com/home-1/project-four-zng9g-rd5bb-sg2ae-aehd5-xz6tx-9ctkt monthly 0.5 2026-09-22 https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/1625600346284-7QWUCVDNYBJADANBQVR2/Rh10_Rl1_sig1000_i163_ph0_M87_Th_400_IMAGE_GRMHD_HAMR3D_plasmoid_red224_1828_226GHz.png Home - Jets - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/60e249f8232bdf05b2db202b/280a4159-cdc7-4707-b222-9a3b0b443aed/QPO.png Home - Jets - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.matthewliska.com/portfolio-1 daily 0.75 2021-07-06 https://www.matthewliska.com/portfolio-1/project-six-kw5x9 monthly 0.5 2020-05-20 https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847359057-HKZQQP8MCEM0UI23R57B/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Six https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847359798-BCTJTJAS19PV54HL6VPM/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Six https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847357814-SZ205VXUQGAN268M8A18/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Six https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847356915-2V61708SR7M0A8IBEJLE/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Six https://www.matthewliska.com/portfolio-1/project-five-j7eya monthly 0.5 2020-05-20 https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847350665-9UOIWAR5X24UBW83TJJO/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Five https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847351213-Z61O7XETZM827W8NSG74/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Five https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847350097-XM9U6QFAY9KBBLO1AZSP/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Five https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847349536-9B5S5JDU6CTTOIHYQPE7/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Five https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847349032-KE99W4O3PP9147GHRC10/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Five https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847348472-8QESU05NL485EPY8X8XO/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Five https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847347954-P3IYHJRVJDA9HIJAOIYW/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Five https://www.matthewliska.com/portfolio-1/project-four-wb473 monthly 0.5 2020-08-27 https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847904251-HVHUK3T1H2QCY05DRHU3/image-asset.jpeg Portfolio 1 - Project Four - Make it stand out. It all begins with an idea. Maybe you want to launch a business. Maybe you want to turn a hobby into something more. Or maybe you have a creative project to share with the world. Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847904480-AXE2TZ6WH1YWOYJELYQQ/image-asset.jpeg Portfolio 1 - Project Four - Make it stand out. It all begins with an idea. Maybe you want to launch a business. Maybe you want to turn a hobby into something more. Or maybe you have a creative project to share with the world. Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847904674-UXDT58LZUDAEN1C4LIKQ/image-asset.jpeg Portfolio 1 - Project Four - Make it stand out. It all begins with an idea. Maybe you want to launch a business. Maybe you want to turn a hobby into something more. Or maybe you have a creative project to share with the world. Whatever it is, the way you tell your story online can make all the difference. https://www.matthewliska.com/portfolio-1/project-three-nhz7c monthly 0.5 2020-05-20 https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847346453-9Q5OWQYQKLUYSEI8HTQ9/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Three https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847347374-LRJZY9Z3THYAKKDMSW3J/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Three https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847345694-G1GWR6PECV9YV30U4V72/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Three https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847344987-MHQ4KNDFGIGPTF2COZ6C/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Three https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847343867-0L1OZAUWGMWQRU45XVH0/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Three https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847343275-2K532N6VSN9EQGN24WT6/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Three https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847342706-683IB8RMYZTUU4LFBADF/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Three https://www.matthewliska.com/portfolio-1/project-two-ak6ep monthly 0.5 2020-05-20 https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847341420-H8BGVV7QHLUZ41NQKDDO/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Two https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847340763-INL9ICD0DK2G1M8D7C0L/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Two https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847340215-08399OG7B1B8UI9HK97O/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Two https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847339638-MF4NXTWSJ51TSBFP4AIM/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Two https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847337890-BMG68HKP3DXYMQZ6BZA6/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Two https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847337276-72BJU9SDMO608XKWX1Y0/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project Two https://www.matthewliska.com/portfolio-1/project-one-eza9s monthly 0.5 2020-05-20 https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847336759-YACMFJPFHUW1OQZJXUUF/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project One https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847336169-ER4P81V0HWA3SH81W1QR/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project One https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847334968-DE82MACUOAUSEZT65M3H/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project One https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847334245-H430ILXV7TTE8OBGPEW8/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project One https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847333502-CVFRP4WIHRB50F56M888/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project One https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847332741-UB05QWW31DIDXCV1C06L/20140301_Trade-151_0124-copy.jpg Portfolio 1 - Project One