In this report, we describe a Software-Defined Radio (SDR) approach for eavesdropping on Near Field Communications (NFC) and Radio Frequency Identification (RFID) cards operating at 13.56 MHz. We show that GNU Radio and Python make a great platform for prototyping, while maintaining sufficient performance for passive attacks without extensive optimizations and using only modest processing power...

Strong synergies between ultralight mass, ultralow drag, and hybrid-electric drive can produce attractive designs for superefficient cars (and many other vehicles). A realistic near-term 4–5-passenger “hypercar”—curb mass 585 kg (advanced-polymer-composite monocoque), CDA 0.36 m, r0 0.0062, fuel-to-shaft ηav 0.385, fuel-to-wheels ηav 0.29, accessory load 250 Wav—can achieve average fuel economy...

Designing and making cars differently ± emphasizing ultralight weight, ultralow drag, and integrated design ± can reduce required propulsive power by about two-thirds. This can make direct-hydrogen fuel cells and commercially available compressed-hydrogen-gas tanks practical and affordable even at relatively high early prices. Coordinating such vehicles with deployment of fuel cells in building...

Many diverse and important barriers, both real and perceived, inhibit automakers’ adoption of advanced composite materials. A strategy to produce an all-advanced-composite body-in-white (BIW) commercially could be the best method to overcome these barriers. This paper summarizes the ultralight, hybrid-electric “hypercar” concept, emphasizing why massoptimization is crucial to its design; summar...

Constructing 3-D nanomaterial-based adsorbents with good mechanical properties has attracted increasing attention. This paper reports a simple strategy to prepare ultralight and superelastic aerogels as efficient for heavy metal Cr(VI) in wastewater by in-situ loading of polypyrrole on cellulose acetate nanofibers followed freeze-drying method. The obtained aerogel possesses obvious porous cros...

High energy astrophysical neutrinos interacting with ultralight dark matter (DM) can undergo flavour oscillations that induce an dependence in the ratios. Such a on neutrino will reflect track to shower ratio telescopes like IceCube or KM3NeT. This opens up possibility study DM density profiles of objects AGN, GRB etc., which are suspected sources such neutrinos.

Ultralight scalar dark matter may induce apparent oscillations of the muon mass, which be directly probed via temporal shifts in spectra muonium and muonic atoms. Existing datasets ongoing spectroscopy measurements with are capable probing scalar-muon interactions that up to 12 orders magnitude more stringent than astrophysical bounds. Ongoing free-fall experiments can probe forces associated e...

Ultralight bosons can form clouds around rotating black holes if their Compton wavelength is comparable to the hole size. The boson cloud spins down through a process called superradiance, lowering spin characteristic value. It has been suggested that measurements of detected by ground-based gravitational-wave detectors be used constrain mass ultralight bosons. Unfortunately, measurement indivi...