Abstract: The present invention relates to the technical field of medical dressings, in particular to an antibacterial polyurethane sponge and a preparation method therefor. An antibacterial dressing, which is obtained by means of adding an antibacterial effective component to a molded polyurethane sponge dressing in a soaking or spraying mode, has a poor antibacterial durability. According to the present invention, on the basis of the problem, a water dispersion system of an antibacterial agent is pre-dispersed in a polyurethane prepolymer and then foamed, which enables the antibacterial agent to be encapsulated in the porous structure of a polyurethane sponge and achieves the effect of slowly releasing antibacterial metal ions, so that the prepared antibacterial polyurethane sponge has a good antibacterial durability.

Abstract: Disclosed herein are compositions to use in biofouling-resistant coatings, biofouling-resistant coatings, methods of making biofouling-resistant coatings, biofouling-resistant devices, and methods of making biofouling-resistant devices.

Abstract: Provided are an experimental apparatus and method for regulating and controlling the Zeeman transition of magnetic resonance. The method includes: generating a constant background magnetic field by using a magnetic shielding cylinder, a background magnetic field coil, and a constant current source, and controlling a Larmor precession frequency corresponding to the background magnetic field to be equal to a frequency of a sinusoidal signal output by a radio frequency signal source; adjusting the amplitude of a signal output by a radio frequency signal source of a pump-probe atomic magnetometer to set a radio frequency signal to be a ?/2 pulse or a ? pulse; and then controlling the radio frequency signal source to output a series of sinusoidal radio frequency pulse strings having the same initial phase. The Zeeman transition of magnetic resonance is regulated and controlled by adjusting the time interval between the radio frequency pulse signals.

Abstract: This invention discloses an approach of achieving bio-based carbon negative topcoats by developing a plant-based non-isocyanate polyurethane coating. Both bio-based contents and carbon dioxide are used as feeding materials in resin synthesis and formulations, yielding durable topcoats with low environmental footprints.

Abstract: Plant-based supple and durable topcoats are achieved by reacting naturally derived epoxides with naturally derived polyfunctional carboxylic acids. The topcoats are coated to various types of substrates including weaved or knitted or nonwoven fabrics, and can show significant advantages of replacing both animal hide leathers and petroleum-based PU leathers by reducing the carbon footprints, and improving environmental sustainability.

Abstract: Radiation-curing bio-based durable topcoats or coatings and a radiation cure method of producing leather alternatives are disclosed. Biobased non-isocyanate poly(hydroxyl urethane) (NIPU), biobased polyesters, biobased polyethers, biobased polycarbonates, and biobased polyamides can be readily synthesized, and further modified with biobased acryloyl chloride, methacryloyl chloride, or itaconic anhydride into biobased radiation curable prepolymers. Through formulating such obtained biobased prepolymers with biobased acrylate and biobased methacrylate monomers, and using a radiation cure method, durable topcoats and leather alternatives with low environmental footprints can be obtained.

Abstract: Disclosed herein are compositions to use in biofouling-resistant coatings, biofouling-resistant coatings, methods of making biofouling-resistant coatings, biofouling-resistant devices, and methods of making biofouling-resistant devices.

Abstract: Disclosed herein are compositions to use in biofouling-resistant coatings, biofouling-resistant coatings, methods of making biofouling-resistant coatings, biofouling-resistant devices, and methods of making biofouling-resistant devices.

Abstract: A simple spray coating process can be utilized to create epoxy/HNT nanocomposites with vertically aligned nanotubes. Important mechanical properties such as modulus and hardness values can be optimized and enhanced by controlling the level of nanotube dispersion during processing and the final orientation of the nanotubes. Thus, a technologically relevant processing scheme can be used to fabricate HNT nanocomposites with a high level of control over nanotube alignment and the resulting mechanical properties.

Abstract: An anti-icing coating can include an amphiphilic copolymer on a surface of an article.

Abstract: Disclosed herein are compositions to use in biofouling-resistant coatings, biofouling-resistant coatings, methods of making biofouling-resistant coatings, biofouling-resistant devices, and methods of making biofouling-resistant devices.

Abstract: According to one embodiment, a measuring apparatus includes a weighing scale, an imaging unit, an identification unit, and an output unit. The weighing scale is configured to measure a weight of merchandise placed in a space for measurement. The imaging unit is configured to image the space for measurement. The identification unit is configured to identify the merchandise placed in the space for measurement, based on a feature of the merchandise shown in an image captured by the imaging unit. The output unit is configured to output predetermined data through which merchandise placed in the space for measurement and a sales price of the merchandise can be specified respectively, based on the weight measured by the weighing scale and an identification result obtained by the identification unit.

Abstract: Disclosed herein are compositions to use in biofouling-resistant coatings, biofouling-resistant coatings, methods of making biofouling-resistant coatings, biofouling-resistant devices, and methods of making biofouling-resistant devices.

Abstract: An anti-icing coating can include an amphiphlic copolymer o» a surface of an article.

Abstract: Disclosed herein are compositions to use in biofouling-resistant coatings, biofouling-resistant coatings, methods of making biofouling-resistant coatings, biofouling-resistant devices, and methods of making biofouling-resistant devices.

Abstract: Strain-gated logic devices are important for the development of advanced flexible electronics. Using a dual-monolayer-promoted film-transfer technique, a flexible multilayer structure capable of undergoing large compressive deformation was prepared. Formation of a crease in the gap between electrodes at a geometrically tunable strain leads to formation of an electrical connection in a reversible and reproducible fashion. A strain-gated electrical switch includes at least two conductive electrodes disposed on a surface of an elastomer substrate, the at least two conductive electrodes forming a gap between the at least two electrodes in an off-state of the strain-gated electrical switch, the gap diminishing under compressive strain to form a crease, the compressive strain pressing the at least two electrodes into contact with each other in an on-state of the strain-gated electrical switch.

Abstract: Method and apparatus of obtaining better detection performance by improving matrix condition for an M×N over-determined MIMO system are disclosed. The condition of a matrix to be inverted for solving various detection problems is improved by reordering equations of the original MIMO system, resulting in a reordered channel matrix and reordered received signal vector so that the top N×N sub-matrix has the largest determinant among all N×N sub-matrices of the reordered channel matrix. The disclosed method may be used to obtain a more accurate estimate of the transmit data bits.

Abstract: A method includes estimating spatial signatures of the signal and interference data streams, forming a composite channel matrix comprising all or a subset of estimated spatial signatures, performing QR decomposition (QRD) of channel matrix with different spatial orderings, selecting the stream with the largest post-detection signal-to-interference-plus-noise ratio (SINR) based on the elements of the R matrices from different QRD processes, pre-processing received signal using the Q matrix corresponding to the spatial ordering with the largest SINR, demodulating the strongest stream using single-stream sliced maximum likelihood (SSS-ML) method, cancelling the strongest stream and demodulating the remaining weaker streams using low-complexity MMSE method.

Abstract: Techniques for minimum-mean-square-error (MMSE) channel estimator using channel-dependent composite subcarriers and combined pilots reduce computational complexity and memory usage while still achieving near optimum performance. A set of interpolation filters, that are pre-calculated for different radio propagation environments, e.g., channel state information, are stored in look up tables at the receiver and used to interpolate channel estimates for combined pilots to obtain channel estimates for individual subcarriers.

Abstract: A simple spray coating process can be utilized to create epoxy/HNT nanocomposites with vertically aligned nanotubes. Important mechanical properties such as modulus and hardness values can be optimized and enhanced by controlling the level of nanotube dispersion during processing and the final orientation of the nanotubes. Thus, a technologically relevant processing scheme can be used to fabricate HNT nanocomposites with a high level of control over nanotube alignment and the resulting mechanical properties.