A helical strake pole system that includes a tubular pole having a longitudinal axis and threaded attachment points. The system further includes a helical strake fin disposed circumferentially around a portion of the tubular pole along the longitudinal axis. The system further includes couplers disposed on the tubular pole. The couplers are configured such that each coupler has a first portion with a slot configured to receive an upper portion of the helical strake fin and a second portion configured to removably coupled to a threaded attachment point of the tubular pole. In addition, each coupler is configured to position a portion of the helical strake fin substantially perpendicular to a surface of the tubular pole.

A cavity system, comprising: a cavity (2) comprising a cavity opening; and an acoustically reflective structure (18, 20) located at least partially within the cavity (2), the acoustically reflective structure (18, 20) comprising one or more acoustically reflective surfaces (24, 26, 30, 32), each acoustically reflective surface (24, 26, 30, 32) being oblique to a plane of the cavity opening (27). The one or more acoustically reflective surfaces (24, 26, 30, 32) may be arranged to reflect incident acoustic waves out of the cavity opening while avoiding reflection into a region (48) at or proximate to a leading edge (14) of the cavity (2).

The present disclosure includes a method of producing a protective tube for insertion into a pipe or vessel containing a medium, the protective tube including a tubular member having a bore extending between an upper and lower of the tubular member, wherein the method includes the steps of providing a preformed element comprising a coiled wire with at least one turn, arranging the preformed element around an outer surface of the tubular member, and welding the preformed element on an outer surface of the tubular member.

The present disclosure includes a method of producing a protective tube for insertion into a pipe or vessel containing a medium, the protective tube including a tubular member having a bore extending between an upper and lower of the tubular member, wherein the method includes the steps of providing a preformed element comprising a coiled wire with at least one turn, arranging the preformed element around an outer surface of the tubular member, and welding the preformed element on an outer surface of the tubular member.

A high moment of inertia aerodynamic golf club head with a low deep center of gravity location and producing reduced aerodynamic drag forces. The club head has crown section attributes that impart beneficial aerodynamic properties and performance.

A high moment of inertia aerodynamic golf club head with a low deep center of gravity location and producing reduced aerodynamic drag forces. The club head has crown section attributes that impart beneficial aerodynamic properties and performance.

The present invention is a system and method for reducing the amount of drag experiences by a moving vehicle as the result of primary airflow across vehicle body edges by introducing a secondary airflow at said edge to reduce the negative pressure created by such an edge such that the turbulence caused by the primary airflow is prevented or reduced.

The present invention is a system and method for reducing the amount of drag experiences by a moving vehicle as the result of primary airflow across vehicle body edges by introducing a secondary airflow at said edge to reduce the negative pressure created by such an edge such that the turbulence caused by the primary airflow is prevented or reduced.

The present disclosure describes a strategy to create self-healing, slippery liquid-infused porous surfaces. Roughened (e.g., porous) surfaces can be utilized to lock in place a lubricating fluid, referred to herein as Liquid B to repel a wide range of materials, referred to herein as Object A (Solid A or Liquid A). Slippery liquid-infused porous surfaces outperforms other conventional surfaces in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low-contact-angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1-1 s), resist ice, microorganisms and insects adhesion, and function at high pressures (up to at least 690 atm). Some exemplary application where slippery liquid-infused porous surfaces will be useful include energy-efficient fluid handling and transportation, optical sensing, medicine, and as self-cleaning, and anti-fouling materials operating in extreme environments.

The present disclosure describes a strategy to create self-healing, slippery liquid-infused porous surfaces. Roughened (e.g., porous) surfaces can be utilized to lock in place a lubricating fluid, referred to herein as Liquid B to repel a wide range of materials, referred to herein as Object A (Solid A or Liquid A). Slippery liquid-infused porous surfaces outperforms other conventional surfaces in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low-contact-angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1-1 s), resist ice, microorganisms and insects adhesion, and function at high pressures (up to at least 690 atm). Some exemplary application where slippery liquid-infused porous surfaces will be useful include energy-efficient fluid handling and transportation, optical sensing, medicine, and as self-cleaning, and anti-fouling materials operating in extreme environments.