Page 57 - Demo

Bilimsel / ScientificTURKCOAT Haziran / June - Temmuz / July 2025 TURKCOAT TURKCOAT Aral%u0131k / December - Ocak / January 2026 Aral%u0131k / December - Ocak / January 2026 5555Gece ara%u00e7 kullanmak, yeni bir s%u00fcr%u00fcc%u00fc i%u00e7in %u00fcrk%u00fct%u00fcc%u00fc bir zorluk olabilir; ancak saatler s%u00fcren pratikle k%u0131sa s%u00fcrede ikinci bir do%u011fa haline gelir. Oysa otonom ara%u00e7lar i%u00e7in pratik yeterli olmayabilir; %u00e7%u00fcnk%u00fc bu ara%u00e7lar%u0131n s%u0131kl%u0131kla %u201cg%u00f6zleri%u201d olarak g%u00f6rev yapan lidar sens%u00f6rleri, koyu renkli nesneleri alg%u0131lamakta zorlan%u0131r. ACS Applied Materials & Interfaces dergisinde yay%u0131mlanan bir ara%u015ft%u0131rma, bu ara%u00e7lar%u0131n koyu renkli nesneleri g%u00f6rebilmesine yard%u0131mc%u0131 olabilecek ve otonom s%u00fcr%u00fc%u015f%u00fc daha g%u00fcvenli hale getirebilecek, y%u00fcksek yans%u0131t%u0131c%u0131l%u0131%u011fa sahip siyah bir boyay%u0131 tan%u0131mlamaktad%u0131r.Lidar, %u201clight detection and ranging%u201d (%u0131%u015f%u0131k alg%u0131lama ve menzil belirleme) ifadesinin k%u0131saltmas%u0131d%u0131r ve jeolojik haritalamadan otonom ara%u00e7lara kadar pek %u00e7ok uygulamada kullan%u0131lan bir sistemdir. Sistem, yank%u0131 ile konum belirlemeye benzer %u015fekilde %u00e7al%u0131%u015f%u0131r; ancak ses dalgalar%u0131 yerine, yak%u0131n k%u0131z%u0131l%u00f6tesi %u0131%u015f%u0131%u011f%u0131n %u00e7ok k%u00fc%u00e7%u00fck darbelerini yayar. Bu %u0131%u015f%u0131k darbeleri nesnelere %u00e7arparak sens%u00f6re geri d%u00f6ner ve sistemin bulundu%u011fu ortam%u0131n %u00fc%u00e7 boyutlu haritas%u0131n%u0131 %u00e7%u0131karmas%u0131n%u0131 sa%u011flar. Ancak siyah boyal%u0131 y%u00fczeylerde oldu%u011fu gibi, nesnelerin yans%u0131tt%u0131%u011f%u0131ndan daha fazla yak%u0131n k%u0131z%u0131l%u00f6tesi %u0131%u015f%u0131%u011f%u0131 absorbe etmesi durumunda lidar yetersiz kal%u0131r.Lidar bu koyu renkli nesneleri tek ba%u015f%u0131na alg%u0131layamad%u0131%u011f%u0131ndan, yayg%u0131n %u00e7%u00f6z%u00fcmlerden biri sistemin bilgi bo%u015fluklar%u0131n%u0131 doldurmak i%u00e7in di%u011fer sens%u00f6rlere veya yaz%u0131l%u0131mlara dayanmas%u0131d%u0131r. Ancak bu yakla%u015f%u0131m da baz%u0131 durumlarda kazalara yol a%u00e7abilir. Bu nedenle Chang-Min Yoon ve %u00e7al%u0131%u015fma arkada%u015flar%u0131, lidar sens%u00f6rlerini yeniden icat etmek yerine, %u00f6zel olarak form%u00fcle edilmi%u015f, y%u00fcksek yans%u0131t%u0131c%u0131l%u0131%u011fa sahip siyah bir boya geli%u015ftirerek koyu renkli nesnelerin mevcut teknolojiyle daha kolay alg%u0131lanmas%u0131n%u0131 hedefledi.Yeni boyay%u0131 %u00fcretmek i%u00e7in ekip, %u00f6ncelikle k%u00fc%u00e7%u00fck cam par%u00e7ac%u0131klar%u0131 %u00fczerinde ince bir titanyum dioksit (TiO%u2082) tabakas%u0131 olu%u015fturdu. Daha sonra cam, Driving at night might be a scary challenge for a new driver, but with hours of practice it soon becomes second nature. For self-driving cars, however, practice may not be enough because the lidar sensors that often act as these vehicles%u2019 %u201ceyes%u201d have difficulty detecting dark-colored objects. Research published in ACS Applied Materials & Interfaces describes a highly reflective black paint that could help these cars see dark objects and make autonomous driving safer. Lidar, short for light detection and ranging, is a system used in a variety of applications, including geologic mapping and self-driving vehicles. The system works like echolocation, but instead of emitting sound waves, lidar emits tiny pulses of near-infrared light. The light pulses bounce off objects and back to the sensor, allowing the system to map the 3D environment it%u2019s in. But lidar falls short when objects absorb more of that near-infrared light than they reflect, which can occur on black-painted surfaces. Lidar can%u2019t detect these dark objects on its own, so one common solution is to have the system rely on other sensors or software to fill in the information gaps. However, this solution could still lead to accidents in some situations. Rather than reinventing the lidar sensors, though, Chang-Min Yoon and colleagues wanted to make dark objects easier to detect with existing technology by developing a specially formulated, highly reflective black paint.To produce the new paint, the team first formed a thin layer of titanium dioxide (TiO2) on small fragments of glass. Then the glass was etched away with hydrofluoric acid, leaving behind a hollow layer of white, highly reflective TiO2. This was reduced with sodium borohydride to produce a black material that maintained its reflective qualities. By mixing this material with varnish, it could be applied as a paint. Nesnelerin Otonom Ara%u00e7lar Taraf%u0131ndan Daha Kolay Alg%u0131lanmas%u0131n%u0131 Sa%u011flayan Siyah BoyaBlack Paint Makes Objects More Visible to Autonomous Cars