A circular 30-microphone array of 90 cm radius has been used to produce acoustic images of several string instruments. The soundboxes were excited by an automated impact hammer, and the instruments were suspended inside the array in such a manner that both the soundbox and hammer mechanism could be rotated in the horizontal plane. By normalizing all microphone signals to the hammer signal, data...

We describe the infinite interval exchange transformations, called rotated odometers, which are obtained as compositions of finite transformations and von Neumann–Kakutani map. show that with respect to Lebesgue measure on unit interval, every such transformation is measurably isomorphic first return map a rational parallel flow translation surface area genus number ends. dynamics odometers by ...

DOI: 10.1002/elps.202100057 The cover picture shows sorting of microdroplets using the sequentially addressable dielectrophoretic array (SADA). SADA is an electrodes (as shown in gold picture) that generates localized electric field synchronized to position and speed flowing target droplets indicated by blue curves picture). resulting force displaces only from default flow, enabling separation ...

Multiple source direction finding algorithms (e.g., MUSIC) are applied on simultaneous measurements collected by M sensors. However, practical considerations may dictate using less receivers than sensors, such that the measurements cannot be collected simultaneously. In such cases, data is collected sequentially from the different array elements in a process which is referred to as ”time varyin...

In this paper, a 5.1-channel audio recording method is proposed by applying the mid-side (MS) stereo recording technique to a coincident microphone array. The coincident microphone array consists of a backward-facing cardioid microphone and the MS microphone array which is composed of a pair of forward-facing cardioid and sideways-facing figure-eight microphones. These 3 microphones produce two...

Power beaming is one of the core technologies for microwave power transmission (MPT) systems. Effective plane-to-plane requires not only high point-to-point efficiency but also appropriately-shaped beam to extract best performance receivers (rectennas). Flat-top plays an important role in drones where output dc from rectennas should be maximized drive motors. It challenging develop a large-scal...

‎‎The investigation of equational compactness was initiated by‎ ‎Banaschewski and Nelson‎. ‎They proved that pure injectivity is‎ ‎equivalent to equational compactness‎. ‎Here we define the so‎ ‎called sequentially compact acts over semigroups and study‎ ‎some of their categorical and homological properties‎. ‎Some‎ ‎Baer conditions for injectivity of S-acts are also presented‎.