Intraday return predictability: Evidence from commodity ETFs and their related volatility indices.

Using high-frequency data of crude oil, gold, and silver exchange-traded funds (ETFs) and their related volatility indices, we analyse patterns of intraday return predictability, also called intraday momentum, in each market. We find that intraday return predictability exists in all the markets, but the patterns of predictability differ for each market, with different half-hour returns, not necessarily the first half-hour returns of the trading day, exhibiting significant predictability for their last half-hour counterparts, depending on the specific market. The intraday return predictability is stronger on days of higher volatility and larger jumps.

Total and sn-2 fatty acid profile of breast milk from women delivering preterm infants under the influence of maternal characteristics.

Data on the total fatty acid (FA) profile and position-specific triacylglycerides (TAGs) in preterm infants' maternal milk are essential for establishing the recommended requirement of FA in preterm infants in China. We aimed to determine the composition and positional distribution of FAs in preterm infants' maternal milk in China and further investigate the effect of maternal background on the FA composition. Breast milk samples (4, 11, 30, 60, and 90 (all ±3) days post-partum) were collected from 59 healthy women delivering preterm infants.

[Clinical analysis of different canalith repositioning maneuver in treatment of apogeotropic nystagmus of horizontal semicircular canal benign paroxysmal positional vertigo].

Objective: To analyze the clinical effect of different canalith repositioning maneuver in the treatment of the apogeotropic nystagmus of horizontal semicircular canal benign paroxysmal positional vertigo (apogeotropic HSC-BPPV).

Method: Forty patients of apogeotropic HSC-BPPV colleted from March 2014 to May 2015 were divided into two groups, each group had 20 cases. The control group was repositioned with the Gufoni maneuver before the Barbecue maneuver, the research group with the improved Nuti maneuver.