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Javier Alarcón

Infrastructure engineer specializing in networking, Linux systems, Kubernetes, and cloud architectures. Covers hardware, networking, observability, and engineering practices for production teams.
RISC-V microcontroller CH32V003 on an affordable development board
Noticias Tech

CH32V003: The 10-Cent RISC-V Chip Dividing the Community

The CH32V003, a ten-cent RISC-V microcontroller, is at the center of a response from an embedded engineer in Trinidad and Tobago to the harshest article the architecture has received in years. The debate exposes a real tension between design elegance and hardware access outside the United States and Europe.

By Javier Alarcón, 2 weeks17 August, 2026 ago
Diagram comparing interrupt handling in RISC-V versus ARM Cortex-M0
Noticias Tech

RISC-V spends 44 cycles on an interrupt, Cortex-M0 only 27

A technical critique of RISC-V’s design, published by engineer Dmitry.GR, breaks down why the open ISA’s interrupt handling is more costly than that of a low-end ARM Cortex-M0 core. The analysis counts cycle by cycle how the lack of automatic register stacking forces developers to write assembly routines before reaching the C code.

By Javier Alarcón, 2 weeks15 August, 2026 ago
Diagram of Kubernetes on Oxide integrations: Rancher, Omni, and Cluster API connected to the Oxide API
Noticias Tech

Oxide Launches Official Kubernetes Integrations: Rancher, Omni, and Cluster API

Oxide Computer built three Kubernetes integrations, Rancher, Omni, and Cluster API, following the real problems its customers ran into when deploying clusters. The process included a Talos Linux bug that prevented reading Oxide’s user-data and an improvised temporary fix before KubeCon.

By Javier Alarcón, 2 weeks13 August, 2026 ago
NVIDIA Nemotron 3.5 Lightning logo, MoE model for AI agents
Noticias Tech

NVIDIA Launches Nemotron 3.5 Lightning, a 30B MoE for AI Agents

NVIDIA launched Nemotron 3.5 Lightning, a 30-billion-parameter MoE model optimized for high-volume AI agents. Alongside it comes NeMo Switchyard, an open source library that routes each task to the most suitable model based on cost, latency, and quality.

By Javier Alarcón, 3 weeks12 August, 2026 ago
Illustration of load balancing distributing traffic across servers
Noticias Tech

Load Balancing: How Traffic Gets Distributed Across Servers

Load balancing is the infrastructure piece that distributes traffic across servers so none of them gets overloaded and a single failure doesn’t take down your application. This article shows real Nginx and HAProxy configurations and explains how to verify everything works.

By Javier Alarcón, 3 weeks11 August, 2026 ago
Illustration of SIMD on GPU: Rust vectors running on warp lanes
Noticias Tech

VectorWare Runs Rust’s Portable SIMD on the GPU Without Changes

VectorWare got SIMD on GPU to run with the same Rust code already used on CPU, compiling core::simd directly to warp instructions. The finding builds on their earlier work porting std::thread to the GPU.

By Javier Alarcón, 3 weeks10 August, 2026 ago
Diagram of the for-sale DNS record defined in RFC 10023 for domains for sale
Redes

RFC 10023 Defines _for-sale, the TXT Record That Announces Domains for Sale

RFC 10023 standardizes _for-sale, a TXT record that lets you announce directly in DNS that a domain is for sale, without touching the website or email that already work. The standard defines a strict version tag format and key-value pairs so brokers and automated services can detect it unambiguously.

By Javier Alarcón, 3 weeks9 August, 2026 ago
Dell XPS 13 laptop next to a MacBook, comparing the energy efficiency of their processors
Noticias Tech

Intel Core 5 320 Beats Apple Silicon in Energy Efficiency

A benchmark by Jeff Geerling shows that the Dell XPS 13 with Intel Core 5 320 beats a MacBook with Apple Silicon in energy efficiency: 6.21 versus 5.38 Gflops per watt. The full results are published on GitHub so anyone can reproduce them.

By Javier Alarcón, 3 weeks8 August, 2026 ago
Ars Notoria, medieval manuscript with magical diagrams for instant knowledge
Noticias Tech

Ars Notoria: The Medieval Manuscript with 56 Copies That Promised to Know Everything

A 13th-century magical treatise promised to transmit all university knowledge through diagrams and prayers, without years of study. An essay from The Public Domain Review reconstructs its history, its condemnation by Thomas Aquinas, and its unexpected parallel with today’s promise of artificial intelligence.

By Javier Alarcón, 4 weeks2 August, 2026 ago
VPN legal tool shield icon next to the European Union flag, symbolizing the EU Court ruling
Redes

EU Court Rules VPNs Are Lawful Technical Tools

The Court of Justice of the European Union ruled that a VPN is a lawful technical tool and that geoblocking is the responsibility of the rights holder, not the VPN provider. The ruling clears up a legal gray area that had gone unresolved for more than a decade.

By Javier Alarcón, 1 month30 July, 2026 ago

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