Lucas Alber
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Blog

Publications

Real-Time Markov Chain Path Guiding for Global Illumination and Single Scattering

We present a lightweight and unbiased path guiding algorithm tailored for real-time applications with highly dynamic content. The algorithm demonstrates effectiveness in guiding both direct and indirect illumination. Moreover, it can be extended to guide single scattering events in participating media.

By Lucas Alber, Johannes Hanika and Carsten Dachsbacher, 2 monthsApril 14, 2025 ago
Blog

Traveler’s Guide to Colombia

Navigating this beautiful country was a bit tricky at times. For this reason I made some notes during my travel which I’ll drop here.

By Lucas Alber, 10 monthsAugust 21, 2024 ago
Publications

Continuing to Catch Up with State of the Art Continuous Integration Pipelines in Palladio–The Experience Report Strikes Back

This research paper presents a case study on the migration from Jenkins to GitHub Actions for automated builds in the development workflow for Palladio.

By Lucas Alber, Nicolas Boltz and Larissa Schmid, 1 yearDecember 22, 2023 ago
QuickTipp

[QuickTipp] Renew an expired GnuPG subkey

It’s that time of the year again… Let’s renew our subkeys! Checking for an expired subkey GPGs messages are not that clear when a subkey expires. For example, Git may refuse to sign a commit with the cryptic message gpg Read more…

By Lucas Alber, 2 yearsDecember 27, 2022 ago
Publications

Cost-aware Adaptive Sampling for Global Metamodeling Using Voronoi Tessellation

We introduce a novel Voronoi-based cost-aware adaptive sampling algorithm for global metamodeling that is independent of the choice of sampling strategy and metamodel. The method is evaluated on a variety of randomly generated black-box and cost functions, where it has shown to vastly outperform existing sampling strategies.

By Johannes Westermann and Lucas Alber, 3 yearsAugust 15, 2022 ago
Server

KeyHelp – Der Schlüssel zum entspannten Webhosting

Webhosting mal ganz entspannt! Das verspricht das Control Panel mit schnell wachsendem Funktionsumfang und schicker Oberfläche. Kommandozeilen-Kung-Fu und Skriptmagie soll nun der Vergangenheit angehören. Im Gegensatz zu den etablierten Alternativen cPanel und Plesk gibt es KeyHelp sogar kostenlos. Zumindest wenn Read more…

By Lucas Alber, 3 yearsMarch 14, 2022 ago
Tutorials

Beautiful Plots with Matplotlib and LaTex

Stop resizing, cropping and pixelated plots. Matplotlib integrates very well with LaTex — if configured correctly.

By Lucas Alber, 4 yearsFebruary 27, 2021 ago
Server

PHP-fpm unter Apache2 aktualisieren

Es ist mal wieder so weit, die aktuelle PHP-Version läuft aus und eine Aktualisierung von PHP steht an, um die neusten Sicherheitsupdates zu erhalten. Der Beitrag stellt die Vorgehensweise PHP-fpm unter Apache2 zu aktualisieren nur beispielsweise am Upgrade von 7.2 Read more…

By Lucas Alber, 4 yearsJanuary 10, 2021 ago
Music

Lautsprecher selber bauen | Teil 2: Frequenzweiche

Die Frequenzweiche spielt eine entscheidende Rolle im Lautsprecher und ihre Verschaltung kann den Klang grundlegend beeinflussen, umso wichtiger ihr also einen eigenen Teil der Reihe zu widmen. Hier gehts zu Teil 1 der “Lautsprecher selber bauen” Reihe. Funktion Die Frequenzweiche Read more…

By Lucas Alber, 4 yearsJanuary 8, 2021 ago
Tutorials

Use and configure GPG – Like a Pro

How to generate subkeys for Git and Mail, store the master key securely and how to avoid a disater. Use and configure GPG like a PRO.

By Lucas Alber, 4 yearsDecember 23, 2020 ago

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