Agency for Science, Technology and Research

Nanyang Technological University

Jun Yang

Jackie Yi-Ru Ying

Yi Wang

Woon Seng Gan

Qingsong Wei

Cheng Chen

Chee Mun Kelvin Lee

Mingdi Xue

Khim Sia Tan

Yew Hin Liew

Furi Andi Karnapi

Kan Sha

Chundong Wang

Meng Hwa Er

A method of rebooting a file system using a non-volatile memory is provided. The method comprising persistently storing critical information in the non-volatile memory, the critical information indicating a status of the file system; in response to a predetermined event, obtaining critical information of the file system stored in the non-volatile memory; determining if the file system has crashed based on the critical information; and rebooting from metadata in the non-volatile memory if it is determined that the file system has crashed.

Method of file system design and failure recovery with non-volatile memory

The invention pertains to heterogenous noble metal nanostructures comprising silver salts and different noble metals, and methods for synthesis and use of various nanocomposite materials having silver salts and different noble metals.

Nanocomposites

The invention describes a nanocomposite particle comprising a nanoparticle having a surface comprising a silver salt, and at least one region of metallic gold on said surface. The invention also provides a nanocomposite material comprising said particles and processes for making the nanocomposite material, either by allowing gold in nanoparticles having a silver salt on the surface thereof to at least partially diffuse through the silver salt so as to form at least one region of metallic gold on said surface, or else by depositing metallic gold on the surfaces of nanoparticles having the silver salt on the surface thereof.

Apparatus is disclosed for steering a directional audio beam that is self-demodulated from an ultrasound carrier. The apparatus includes means for modulating a carrier signal with an audio signal and means for adjusting the amplitude and phase of at least one of the audio signal and/or the carrier signal to steer the audio beam to a desired direction. The apparatus also includes means for generating an ultrasound beam in the desired direction driven by the modulated carrier signal. The apparatus may include means for weighting the audio and/or carrier signal by a zeroth order Bessel function to synthesize a Bessel distribution source. A corresponding method for steering a directional audio beam is also disclosed. A harmonic generator may be used to generate harmonics of low frequencies in the audio signal. The harmonics may provide (upon demodulation) a psycho-acoustic impression of improved perception of low frequencies. Further, a modulated ultrasonic signal or an unmodulated audio signal may be band-passed into two or more different band-limited signals. The band-limited signals may be amplified and transmitted by ultrasonic transducers having mechanical resonance frequencies substantially equal to a characteristic frequency of the band-limited signals. Ultrasonic processing of the audio signal may include square root methods without generating large numbers of harmonics.

Steering of directional sound beams

Growing community of inventors

Singapore, Singapore

Jun Yang