Balloons for Naval Purposes

Cosmic balloons.

Cosmic balloons, consisting of relativistic particles trapped inside a spherical domain wall, may be created in the early universe. We calculate the balloon mass M as a function of the radius R and the energy density profile, ρ(r), including the effects of gravity. At the maximum balloon mass 2GM/R ≈ 0.52 for any value of the mass density of the wall. [email protected] Domain walls may fo...

Drug-eluting balloons for percutaneous coronary interventions.

Thromb Haemost 2009; 101: 9–11 The simple and originally naïve idea of dilating a coronary stenosis to restore unobstructed coronary flow through percutaneous transluminal coronary angioplasty (PTCA) (1) has been a major advance in the treatment of acute coronary syndromes and is currently also commonly used in stable coronary artery disease (2). However, there is no such thing as a “free lunch...

Intragastric balloons: a temporary treatment for obesity.

(1) Intragastric balloons are a temporary non-surgical obesity treatment that induces short-term weight loss by partially filling the stomach to achieve satiety and reduce food intake. (2) Moderate weight loss may be achieved if patients adhere to a weight-reduction program. Weight gain often recurs when the balloon is removed after six months. (3) Abdominal pain, nausea, and vomiting are commo...

Maximally stable lobed balloons

Article history: Received 25 March 2009 Received in revised form 23 September 2009 Available online 23 February 2010

Center for Naval Analyses 4825