Abstract: Methods, systems, and devices for wireless communications for opportunistic sounding for low latency applications are described. An access point (AP) may communicate with one or more stations (STAs), and may communicate a control message indicating more than one periodic service periods for wireless communication with the one or more STAs. The AP may transmit, via a transmit beam, a data message during a first service period of the more than one periodic service periods based on a first compressed beamforming estimate (CBF) for the transmit beam being satisfactory for the first service period and transmit one or more sounding signals during the first service period after transmitting the data message based on the first CBF being suboptimal for a second service period that occurs after the first service period. The STA(s) may transmit, and the AP may receive, an indication of a second CBF based on the one or more sounding signals.

Abstract: Novel skin care, hair care, nail care, lip care and related external formulations based on partial and complete choline salts of mono, di, tri and polyvalent carboxylic acids of food, cosmetic and pharmaceutical acids are described. These salts have better moisturizing and treating properties compared to the original acids. They tend to form highly elegant cosmetic treatment products when incorporated into lotions, creams, gels, liquids, bars, sticks, sprays and foam products. The mono choline salts of di and polyvalent carboxylic acids are also described in the invention. These mono choline salts tend to retain or enhance the biological properties of the parent molecule with enhanced solubility and bio-availability. These mono choline salts can be formulated as simple solutions and lotions eliminating need of complicated solubilizing systems. The partial and mono choline salts tend to reduce irritation, burning and stinging sensation common to these carboxylic acids.