A power amplifier topology is presented that incorporates a feedback network around the active device that can be tuned for smalland large-signal circuit operation. The PA is fabricated in a 120-nm SiGe BiCMOS process and from 37-47 GHz. The PA achieves a saturated output power of 23 dBm and a peak PAE of 20% at 38 GHz.

The first emission inventory from the Distrito Metropolitano de Quito (DMQ) (Ecuador) and WRF-Chem were used to obtain O3 concentrations during the period 11th – 28th Sep/2006. A preliminary comparison with records of the automatic air quality monitoring network shows that during daytime hours, O3 concentrations are well captured by the model. During nighttime the model provides higher concentr...

Sensitivity measurements performed on EVLA antenna #14 show that the cold-sky zenith system temperature is about 45K for the 18 – 26 GHz band, and 60 K for the low frequency end of the 40 – 50 GHz band, rising to 95 K at the high frequency end. Efficiency measurements based on the planet Venus show the antenna efficiency to be about 50% in the 18 – 26 GHz band, and about 28% for the 40 – 50 GHz...

Epidemiologic and health impact studies have examined the chemical composition of ambient PM2.5 in China but have been constrained by the paucity of long-term ground measurements. Using the GEOS-Chem chemical transport model and satellite-derived PM2.5 data, sulfate and ammonium levels were estimated over China from 2004 to 2014. A comparison of the satellite-estimated dataset with model simula...

High smoke concentrations in Equatorial Asia, primarily from land conversion to oil palm plantations, affect a densely populated region and represent a serious but poorly quantified air quality concern. Continued expansion of the oil palm industry is expected but the resulting population exposure to smoke is highly dependent on where this expansion takes place. We use the adjoint of the GEOS-Ch...

The QLBS model is a discrete-time option hedging and pricing model that is based on Dynamic Programming (DP) and Reinforcement Learning (RL). It combines the famous Q-Learning method for RL with the Black-Scholes (-Merton) model’s idea of reducing the problem of option pricing and hedging to the problem of optimal rebalancing of a dynamic replicating portfolio for the option, which is made of a...

32 33 We present a global data set of free tropospheric ozone-CO correlations with 2 o × 2.5 o 34 spatial resolution from the OMI and AIRS satellite instruments for each season of 2008. 35 OMI (ozone) and AIRS (CO) have near daily global coverage and observe coincident 36 scenes with similar vertical sensitivities. The resulting ozone-CO correlations are highly 37 statistically significant (pos...

objective background: preterm labor, which defines as live-birth delivery before 37 weeks of gestation is a main determinant of neonatal morbidity and mortality around the world. : the aim of this study was to determine the prevalence of preterm labor in iran by a meta-analysis study, to be as a final measure for policy makers in this field. materials and methods: in this meta-analysis, the dat...

32 33 We simulate nitrogen deposition over the US in 2006-2008 by using the GEOS-Chem 34 global chemical transport model with 1/2° × 2/3° horizontal resolution over North 35 America and adjacent oceans. US emissions of NO x and NH 3 in the model are 6.7 and 2.9 36 Tg N a-1 respectively, including a 20% natural contribution for each. Ammonia emissions 37 are a factor of 3 lower in winter than su...