Previous studies of associative encoding that used explicit retrieval tasks have shown both age- and dementia of the Alzheimer type (DAT)-related declines, but such results may be biased by group differences in explicit retrieval. In the present experiment, the authors assessed implicit associative encoding for 25 younger adults (ages 18-25), 73 healthy older adults (ages 59-91), and 65 adults ...

BACKGROUND Despite substantial evidence for neighborhood characteristics correlating with walking, so far there has been limited attention to possible practical implications for neighborhood design. This study investigates to what extent design guidelines are likely to stimulate walking. METHODS Four of the New Urbanism Smart Scorecard criteria and two other measures were tested for their inf...

The watermark signals are weakly inserted in images due to imperceptibility constraints which makes them prone to errors in the extraction stage. Although the error correcting codes can potentially improve their performance one must pay attention to the fact that the watermarking channel is in general very noisy. We have considered the trade-o of the BCH codes and repetition codes in various co...

We demonstrate a simple, compact and low cost Q-switched erbium-doped fiber laser (EDFL) exploiting a graphene saturable absorber (GSA) for possible applications in metrology, sensing and medical diagnostics. The EDFL operates at 1560 nm with repetition rates of 31.3 kHz and 25 kHz with GSA1 and GSA2, respectively, at pump power of 120 mW. The repetition rate is smaller with a lower pump power....

Phase-matched difference-frequency mixing in a thin GaSe crystal within the broad spectrum of 25-fs pulses from a Ti:sapphire oscillator multipass amplifier system permits the generation of few-cycle electric field transients, frequencies up to 30 THz, and amplitudes of more than 1 MV/cm. The field transients generated at a 1-kHz repetition rate are directly measured by electro-optic sampling b...

Unique Games Conjecture (UGC), proposed by [24], lies in the center of many inapproximability results. At the heart of UGC lies approximability of MAX-CUT, which is a special instance of Unique Game. [25, 29] showed that assuming Unique Games Conjecture, it is NPhard to distinguish between MAX-CUT instance that has a value 1 − ε vs. 1 − Ω( √ ε). [14] then showed a matching polynomial time algor...

Background Motor intervention plays an important role in reducing the disabilities of Down syndrome (DS). A lack of balance and postural control has created motor problems in DS patients. Therefore, the aim of this study was to examine the effect of backward walking on postural stability of DS patients. Materials and Methods Sixteen DS children with 8-10 age range were selected by convenience s...

BACKGROUND Muscle size and strength decrease with aging, and the resultant muscle weakness has been implicated in increased risk of falls in older adults. These falls have large economic and functional costs. METHODS The purpose of this randomized, controlled study was to determine if an 8-week, 3-day per week intense (77.8 +/- 3.4% of 1-repetition maximum [1RM]) strength training program cou...

This paper presents a new nonintrusive device for everyday gait analysis and health monitoring. The system is a standard rollator equipped with encoders and inertial sensors. The assisted walking of 25 healthy elderly and 23 young adults are compared to develop walking quality index. The subjects were asked to walk on a straight trajectory and an L-shaped trajectory respectively. The walking tr...

To test for an association between the LRRK2-G2019S mutation and gait, we studied 52 first-degree relatives of patients with Parkinson's disease (PD) who carry this mutation. An accelerometer quantified gait during usual-walking, fast-walking, and dual-tasking. Noncarriers (n = 27) and carriers (n = 25) were similar with respect to age, gender, height, and gait speed during all conditions. Duri...