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Grundig G2 Reporter

AM-FM-SW-Radio/Recorder Features Digital AM/FM/SW radio with Signal Strength Indicator 248-station Memory Storage 5 Tuning Methods: Jog Tuning, Manual, Auto Tuning, Memory, ATS (Auto Tuning Storage) MP3 and WMA Decode and Recording, E-Book TXT Support Dual Stereo Speakers with Digital Volume Control Record Functions: MIC Record, Line-in Record, Record Radio (able to record while playing) Sleep Timer and Alarm Clock Functions Multiple Language Selection Built-in Flash Memory (4GB) Built-in micro-SD Card Reader (supports up to 16GB) Upgradable Firmware Ports: 3.5mm headphone output, Line-In, MIC, MINI-USB 2.0 Jack (High Speed) Rechargeable Lithium Battery (1250mAh), Charge Through USB Dimensions: 7½" W x 3½" H x 0.8" D (190 x 90 x 21 mm) Weight: 9.6 oz. (272 g)

Hicks, R. Andrew, "Designing a Mirror to Realize a Given Projection," J. Opt. Soc. Am. A, vol. 22, No. 2, Feb. 2005

The conversion of sunlight into electricity has been dominated by photovoltaic and solar thermal power generation. Photovoltaic cells are deployed widely, mostly as flat panels, whereas solar thermal electricity generation relying on optical concentrators and mechanical heat engines is only seen in large-scale power plants. Here we demonstrate a promising flat-panel solar thermal to electric power conversion technology based on the Seebeck effect and high thermal concentration, thus enabling wider applications. The developed solar thermoelectric generators (STEGs) achieved a peak efficiency of 4.6% under AM1.5G (1 kW m−2) conditions. The efficiency is 7–8 times higher than the previously reported best value for a flat-panel STEG, and is enabled by the use of high-performance nanostructured thermoelectric materials and spectrally-selective solar absorbers in an innovative design that exploits high thermal concentration in an evacuated environment.