Molecular Actuator: Redox-Controlled Clam-Like Motion in a Bichromophoric Electron Donor

The one-electron oxidation of tetramethoxydibenzobicyclo[4.4.1]undecane (4) prompts it to undergo a clam-like electromechanical actuation into a cofacially π-stacked conformer as established by (i) electrochemical analysis, (ii) by the observation of the intense charge-resonance transition in the near IR region in its cation radical spectrum, and (iii) by X-ray crystallographic characterization of the isolated cation radical salt (4+• SbCl6−)

SC VALL-E: Style-Controllable Zero-Shot Text to Speech Synthesizer

Expressive speech synthesis models are trained by adding corpora with diverse speakers, various emotions, and different speaking styles to the dataset, in order to control various characteristics of speech and generate the desired voice. In this paper, we propose a style control (SC) VALL-E model based on the neural codec language model (called VALL-E), which follows the structure of the generative pretrained transformer 3 (GPT-3). The proposed SC VALL-E takes input from text sentences and prompt audio and is designed to generate controllable speech by not simply mimicking the characteristics of the prompt audio but by controlling the attributes to produce diverse voices. We identify tokens in the style embedding matrix of the newly designed style network that represent attributes such as emotion, speaking rate, pitch, and voice intensity, and design a model that can control these attributes. To evaluate the performance of SC VALL-E, we conduct comparative experiments with three representative expressive speech synthesis models: global style token (GST) Tacotron2, variational autoencoder (VAE) Tacotron2, and original VALL-E. We measure word error rate (WER), F0 voiced error (FVE), and F0 gross pitch error (F0GPE) as evaluation metrics to assess the accuracy of generated sentences. For comparing the quality of synthesized speech, we measure comparative mean option score (CMOS) and similarity mean option score (SMOS). To evaluate the style control ability of the generated speech, we observe the changes in F0 and mel-spectrogram by modifying the trained tokens. When using prompt audio that is not present in the training data, SC VALL-E generates a variety of expressive sounds and demonstrates competitive performance compared to the existing models. Our implementation, pretrained models, and audio samples are located on GitHub

Help Me Chat: Eliciting Communicative Acts from Young Children Using Speech-Generating Devices

Augmentative and alternative communication (AAC) is an evidence-based practice targeting the communication deficits of children with complex communication needs (CCN). While young children with communication disorders are attending preschool and using AAC, and specifically speech-generating devices (SGDs), with increasing frequency, best practices for implementation with this population are largely unexplored. In an effort to contribute to the knowledge base for teachers, the essential communication partners for children in the classroom setting, this research explored the interactions of four teacher-child dyads and analyzed the prompts and cues used to elicit communicative acts from the children. Results of statistical and descriptive analyses revealed that, while teachers overwhelmingly favor and use verbal prompts over other stimuli, these prompts were no more effective in eliciting communicative acts. These results indicate that teachers would benefit from instruction in a variety of techniques for enhancing communication via AAC; future research directions towards this purpose are detailed

Tuning and Switching a Plasmonic Quantum Dot Sandwich in a Nematic Line Defect

We study the quantum-mechanical effects arising in a single semiconductor core/shell quantum dot controllably sandwiched between two plasmonic nanorods. Control over the position and the sandwich confinement structure is achieved by the use of a linear-trap, liquid-crystal line defect and laser tweezers that push the sandwich together. This arrangement allows for the study of exciton plasmon interactions in a single structure, unaltered by ensemble effects or the complexity of dielectric interfaces. We demonstrate the effect of plasmonic confinement on the photon-antibunching behavior of the quantum dot and its luminescence lifetime. The quantum dot behaves as a single emitter when nanorods are far away from the quantum dot but shows possible multiexciton emission and a significantly decreased lifetime when tightly confined in a plasmonic sandwich. These findings demonstrate that liquid crystal defects, combined with laser tweezers, enable a versatile platform to study plasmonic coupling phenomena in a nanoscale laboratory, where all elements can be arranged almost at will.Comment: Supporting information at the en

Telephone-accessed controller using CEBus for device control over power line

The CEBus standard has made it possible for devices developed by different manufacturers to communicate over the power line. Further, the standard allows analog adjustments of devices besides transmitting and receiving binary information. This Controller extends the distance from which these devices can be controlled. To extend the distance of communication with a device, a telephone line interface was developed that allows the user to communicate with a CEBus device via the Controller. The Controller responses [sic] to Central Office signaling and opens its communication channel to allow the user to provide it with the commands by using the telephone keypad. The Controller interprets these commands and sends the appropriate information over the power line to the device specified in the command. To make the Controller user friendly a voice circuit has been included. This circuit provides all the prompts and responses to guide the user for proper operation of the Controller

Attitudes on Medical Ethics of Criminal Neurointerventional Treatment

As contemporary scientific advancements offer the opportunity to manipulate processes of the human body at a higher degree of invasiveness than ever before, a number of bioethical concerns are raised. One significant concern is how to discern the acceptable integration of advancements in neurologically-based interventions into the criminal justice system. Past literature supports the idea that there are several variables that interact to form a global conversation on the ethics of compromising a criminal’s freedom of mind for the purposes of sentencing or rehabilitation. Attitudes toward the current criminal justice system and the current uses of neurointerventions are significantly influential, and the public attitudes of such topics have been well-recorded through the literature. An experienced physician was interviewed in order to gain the perspective of a professional who regularly implements neurologically-based treatments. The results of the interview suggested that professionals have a moderate level of confidence that the current relationship between the criminal justice system and neurointerventional methods has generally remained within ethical boundaries. The results also suggested that medical practitioners are tasked with balancing the dignity and the safety patients, which can cause frequent ethical dilemmas. The varying responsibilities of medical professionals keep them equipped to implement expert-level care while simultaneously considering the ethical ramifications of their decisions

Synthesis and Characterization of Vanadium Dioxide on III-Nitride Thin Films Using Low Pressure Chemical Vapor Deposition for Sensing Applications

State-of-theart technology demands new exotic materials fit for utilization in miniaturized circuits; also, additionally, increase their capabilities. Transition metal oxides have attracted keen interest over the last decade, thanks to the variety of physical properties that they exhibit. These thesis works present a study for the development and characterization of VO2 on substrates; AlGaN/ GaN, SiO2, and Sapphire. The Oxides of Vanadium has exclusive properties with a potential novel application within the Integrated-Circuits industry. The low-pressure chemical vapor deposition technique makes a highly pure and ordered form of crystalline thin films of VO2 on every one of those substrates. The sharp transition in electrical and structural properties of VO2 throughout the Metal-Insulator Transition (MIT) is suitable for varied electronic, optoelectronic, and sensing applications. We have primarily studied Chemical Vapor Deposition based synthesis of VO2 on metallic element chemical compound (AlGaN) thin films and compared them with those synthesized on Silicon and Sapphire. Thin-film Vanadium metal (35 nm and 70 nm) is deposited on different substrates, followed by oxidization to yield Vanadium dioxide films. The result of deposition time, oxygen flow rate, substrate temperature, radiative cooling time, and chamber pressure consistently studied to get the most effective quality films. The synthesis is conducted on comparatively large area vanadium deposited samples, and microscale vanadium patterned samples. The as-grown Vanadium Dioxide films were characterized by AFM and XRD techniques to work out their structural and crystalline qualities. VO2 films synthesized under optimal CVD growth conditions were successfully used in GaN MEMS devices for sensitive deflection transduction

SWITCHING BETWEEN THE L1 AND L2: TEACHERS CORRECTIVE FEEDBACK AND LEARNER UPTAKE

SWITCHING BETWEEN THE L1 AND L2: TEACHERS CORRECTIVE FEEDBACK AND LEARNER UPTAK

A Study of Accomodation of Prosodic and Temporal Features in Spoken Dialogues in View of Speech Technology Applications

Inter-speaker accommodation is a well-known property of human speech and human interaction in general. Broadly it refers to the behavioural patterns of two (or more) interactants and the effect of the (verbal and non-verbal) behaviour of each to that of the other(s). Implementation of thisbehavior in spoken dialogue systems is desirable as an improvement on the naturalness of humanmachine interaction. However, traditional qualitative descriptions of accommodation phenomena do not provide sufficient information for such an implementation. Therefore, a quantitativedescription of inter-speaker accommodation is required. This thesis proposes a methodology of monitoring accommodation during a human or humancomputer dialogue, which utilizes a moving average filter over sequential frames for each speaker. These frames are time-aligned across the speakers, hence the name Time Aligned Moving Average (TAMA). Analysis of spontaneous human dialogue recordings by means of the TAMA methodology reveals ubiquitous accommodation of prosodic features (pitch, intensity and speech rate) across interlocutors, and allows for statistical (time series) modeling of the behaviour, in a way which is meaningful for implementation in spoken dialogue system (SDS) environments.In addition, a novel dialogue representation is proposed that provides an additional point of view to that of TAMA in monitoring accommodation of temporal features (inter-speaker pause length and overlap frequency). This representation is a percentage turn distribution of individual speakercontributions in a dialogue frame which circumvents strict attribution of speaker-turns, by considering both interlocutors as synchronously active. Both TAMA and turn distribution metrics indicate that correlation of average pause length and overlap frequency between speakers can be attributed to accommodation (a debated issue), and point to possible improvements in SDS “turntaking” behaviour. Although the findings of the prosodic and temporal analyses can directly inform SDS implementations, further work is required in order to describe inter-speaker accommodation sufficiently, as well as to develop an adequate testing platform for evaluating the magnitude ofperceived improvement in human-machine interaction. Therefore, this thesis constitutes a first step towards a convincingly useful implementation of accommodation in spoken dialogue systems