The majority of models of inflation in string theory predict an absence of measurable gravitational waves, r << 10−3. The most promising proposals for making string theoretic models that yield measurable tensor fluctuations involve axion fields with slightly broken shift symmetry. We consider such models in detail, with a particular focus on the N-flation scenario and on axion valley/natural in...

We present a model with a complex and a real scalar fields and a potential whose symmetry is explicitly broken by Planck-scale physics. For exponentially small breaking, the model accounts for the period of inflation in the early universe and for the period of acceleration of the late universe or for the dark matter, depending on the smallness of the explicit breaking.

Over the past three years we have determined the basic features of the Universe – spatially flat; accelerating; comprised of 1/3 a new form of matter, 2/3 a new form of energy, with some ordinary matter and a dash of massive neutrinos; and apparently born from a burst of rapid expansion during which quantum noise was stretched to astrophysical size seeding cosmic structure. The New Cosmology gr...

1310 Communications to the Editor cuff inflation is seldom seen, and an increase of 1 ml or less in cuff volume can markedly increase LW? What can be done to minimize the possibility of cuff-induced tracheal damage? First, select the largest endotracheal tube that can be inserted atraumatically. A greater cross-sectional area ratio between the tube and the trachea means less air must be injecte...

n 1992, President Bush proposed legislation intended to speed up the recovery from the 1990-91 recession. Congress rejected this proposal for countercyclical fiscal policy stimulus. In early 1993 President Clinton proposed his own stimulus package, but Congress rejected this proposal too. Many reasons were given for deciding against these two discretionary fiscal policy proposals, but perhaps t...

We study the welfare cost of inflation in a general equilibrium life cycle model with growth, costly financial intermediation, and taxes on nominal quantities. We find a stationary equilibrium of the model matches a wide variety of facts about the postwar U.S. economy. We then calculate that the inflation policy of the monetary authority has welfare consequences for agents that are an order of ...

The case for a free-market commodity money as provided by a genuine gold standard is simple yet decisive. It is based on the insight that the root cause of inflation in the modern world is the almost absolute monopoly over the supply of money which all national governments possess within their respective political jurisdictions. That such an arrangement necessarily produces inflation is not dif...

OBJECTIVES We assessed time-varying spectral components of heart rate and left ventricular (LV) pressure variability during coronary angioplasty to elucidate dynamic autonomic responses to transient myocardial ischemia. BACKGROUND Sympathoexcitatory reflexes elicited by acute coronary occlusion are rarely addressed in the clinical settings because of a lack of technique to monitor transient c...

A noninferiority (NI) trial is sometimes employed to show efficacy of a new treatment when it is unethical to randomize current patients to placebo because of the established efficacy of a standard treatment. Under this framework, if the NI trial determines that the treatment advantage of the standard to the new drug (i.e. S-N) is less than the historic advantage of the standard to placebo (S-P...