Nature Appreciation

Combinatorial optimization problems arise across logistics, scheduling, and engineering, and C++ remains a language of choice when performance matters. This lecture takes a practical look at solving such problems in C++, using the Electric Vehicle Routing Problem as a running example. We begin with an exact solver, formulating the problem as a mixed-integer program and trying to solve it through GLPK's C API directly from C++. Exact methods, however, quickly hit their limits on real-world instances. The second half of the talk turns to metaheuristics: how they are designed, why C++ is particularly well suited for implementing them, and what design choices matter most in practice. We'll walk through a concrete implementation, touching on data structures for fast neighborhood evaluation, generic algorithm design with templates, and the performance considerations that separate a prototype from a production-ready solver. The goal is not to advocate for one approach over another, but to show how C++ supports the full spectrum of optimization techniques. # About Speaker Luka Matijević is a researcher at the Mathematical Institute of the Serbian Academy of Sciences and Arts, whose work bridges academic research and freelance engineering. He's drawn to identifying the right algorithm for a given problem — and to the kind of careful optimization captured by one of his favourite Futurama lines: *"When you do things right, people won't be sure you've done anything at all."* ## 📅 Event Details | | | | --- | --- | | 👤 **Speaker** | **[Luka Matijević](https://www.linkedin.com/in/luka-matijevic/)** | | 🕕 **Date & Time** | **27th of May (Wednesday), 6 pm** | | 📍 **Location** | **Beograđanka, Vidikovac, 22nd floor** | | 🏢 **Address** | **Masarikova 5** | | 💻 **Online** | **[C++ Serbia YouTube](https://www.youtube.com/@cppserbia)** | See you!

June 17, 2026: Worthington Library. Wild Ohio: The Best of Our Natural Heritage. Jim McCormac. Worthington, Ohio. 7 pm.

The number of ticks and tick diseases in Ohio have quickly multiplied over the last 10 years. Dean Kreager discusses tick species, tick pathogens, tick-borne diseases, tick bite prevention, and proper tick removal. Kreager is an Agriculture and Natural Resources Educator with OSU Extension in Licking County * Lakewood Public Library (in Hebron)- May 26 at 7pm [https://events.lickingcountylibrary.org/event/tick-talk-29621](https://events.lickingcountylibrary.org/event/tick-talk-29621) * Johnstown public library at 7:00 pm June 8 [https://events.lickingcountylibrary.org/event/ctick-talk-29622](https://events.lickingcountylibrary.org/event/ctick-talk-29622) Free to attend, no RSVP needed

Let’s meet and wander the galleries! General admission on Sundays is free.

Nature’s Bounty: Teas & Traditions Hosted by Ohio History Connection: * May. 30 * Time: Noon-4 p.m * General - $15 * Ohio History Connection Member - Free * Location: Newark Earthworks - a UNESCO World Heritage Site, Octagon Earthworks 125 N. 33rd St., Newark, OH 43055 Did you know that Red Willow has the same natural compounds as aspirin? What about Staghorn Sumac and Purple Coneflower, containing large amounts of Vitamin C? Join us as we learn all about the uses of plants. This program will hike the grounds of the Octagon to learn about nature’s bounty. In addition, it will explore the vast knowledge of American Indian peoples regarding how plants help humans. Guests will be able to sample several teas made from plants that will be discussed. Disclaimer: This is for interpretative purposes only, and we are not promoting natural healing or any use of self-care or medical advice. Click here to register [https://hopewellearthworks.org/events/natures-bounty-teas-traditions/](https://hopewellearthworks.org/events/natures-bounty-teas-traditions/) Contact 740.344.0498 or newarkearthworks@ohiohistory.org https://hopewellearthworks.org/site/octagon-earthworks/

Who else is ready to sit outside? Join us for a casual chat over coffee & tea at Grandview Grind! Come out and meet some new people, enjoy your favorite drink, and make some new friends!

The number of ticks and tick diseases in Ohio have quickly multiplied over the last 10 years. Dean Kreager discusses tick species, tick pathogens, tick-borne diseases, tick bite prevention, and proper tick removal. Kreager is an Agriculture and Natural Resources Educator with OSU Extension in Licking County * Lakewood Public Library (in Hebron)- May 26 at 7pm [https://events.lickingcountylibrary.org/event/tick-talk-29621](https://events.lickingcountylibrary.org/event/tick-talk-29621) * Johnstown public library at 7:00 pm June 8 [https://events.lickingcountylibrary.org/event/ctick-talk-29622](https://events.lickingcountylibrary.org/event/ctick-talk-29622) Free to attend, no RSVP needed