We demonstrate a scheme for nonlinear pulse compression at high average powers based on self-phase modulation in a multi-pass cell using fused silica as the nonlinear medium. The scheme is suitable for compression of pulses with peak powers exceeding the threshold for critical self-focusing. At >400  W of input power, the pulses of a Yb:YAG-Innoslab laser system (10 MHz repetition rate, 850 fs ...

Utterances of five Japanese infants and their parents were recorded longitudinally and used to develop an infant speech database. This database was used to analyze the voicedsegment ratio to investigate the developmental changes in utterances produced by infants and parents. The voicedsegment ratio is the ratio of the summed duration of a voiced segment to the total utterance duration. The anal...

In this paper we present a consistent set of exercises for children with dyslalia (dyslalia is a speech disorder that affect pronunciation of one ore many sounds). The achievement has gone from “Therapeutic Guide" made available by the team of researchers led by Professor Mrs. Iolanda TOBOLCEA from the "Alexandru Ioan Cuza" University of Iasi. The specifications of the "Therapeutic Guide" have ...

Many studies have shown that speech style affects pronunciation reduction, mixed results have been obtained for gender, and few results have been published regarding the relationship between age and reduction. In the present paper we investigate how pronunciation reduction is related to speech style, gender and age. Significant effects were found for speech style and age, while the effect of ge...

Child-directed speech (CDS) is a talking style adopted by caregivers when they talk to toddlers (Snow, 1995). We consider the role of distributional semantic features of CDS in language acquisition. We view semantic structure as a manifold on which words lie. We compare the semantic structure of verbs in CDS to the semantic structure of child speech (CS) and adult-directed speech (ADS) by measu...

We describe the dimensions along which Facebook users tend to express themselves via status updates using the semiautomated text analysis approach, the Meaning Extraction Method (MEM). First, we examined dimensions of selfexpression in all status updates from a sample of four million Facebook users from four English-speaking countries (the United States, Canada, the United Kingdom, and Australi...

A novel bit-detect-and-forward (BDF) relaying scheme based on repetition coding with the relay is proposed, significantly improving the robustness to impairments proper to free-space optical (FSO) communications such as unsuitable alignment between transmitter and receiver as well as fluctuations in the irradiance of the transmitted optical beam due to the atmospheric turbulence. Closed-form as...

We propose and experimentally demonstrate an all-optical Nyquist sinc-shaped pulse train source based on intensity modulation and four-wave mixing. The proposed scheme allows for the tunability of the bandwidth and the full flexibility of the repetition rate in the limit of the electronic bandwidth of the modulators used through the flexible synthesis of rectangular frequency combs. Bandwidth u...

By using optical sampling with repetition frequency modulation of pump/probe laser pulses on photoconductive emitter/detector antennas, the high-speed time/frequency domain gigahertz imaging is reported due to the absence of opto-mechanical delay line in this optical scheme. The clear contrast for a 3-cm wide metal plate, which was placed behind a 5-cm thick concrete block, was observed with a ...