Significance Theta oscillations supported by the medial septum are believed to be a critical mechanism for learning and memory. We report that, in addition theta oscillations, hippocampal SPW-Rs important. Enhanced cholinergic activation hippocampus during delay between choices spontaneous alternation task abolished impaired choice performance mice. Our findings also demonstrate that outcome of optogenetic manipulation key neurotransmitter, acetylcholine (ACh), depends on state brain at time...

Resting-state functional MRI (rs-fMRI) has been widely used for the early diagnosis of autism spectrum disorder (ASD). With rs-fMRI, connectivity networks (FCNs) are usually constructed representing each subject, with element pairwise relationship between brain region-of-interests (ROIs). Previous studies often first extract handcrafted network features (such as node degree and clustering coefficient) from FCNs then construct a prediction model ASD diagnosis, which largely requires expert...

Abstract Resting‐state functional magnetic resonance imaging (rs‐fMRI) helps characterize regional interactions that occur in the human brain at a resting state. Existing research often attempts to explore fMRI biomarkers best predict disease progression using machine/deep learning techniques. Previous studies have shown learning‐based methods usually require large amount of labeled training data, limiting their utility clinical practice where annotating data is time‐consuming and...

In order to meet the practical needs of all-fiber conductivity-temperature-depth sensors with high sensitivity, compact structure, and easy packaging, this Letter uses a microfiber coupler combined fiber loop (MCFL) reflective photonic device conduct salinity, temperature, deep sensing experiments. These MCFLs’ dynamic range resolution depth can requirements actual marine environment monitoring. This structure opens up new design idea for research coupler-based environmental parameter sensors.

Adiabatic wavelength conversion is experimentally demonstrated at a single photon power-level using an integrated silicon ring resonator. This approach allows of to arbitrary wavelengths with no energy or phase matching constraints. The inherently low-noise and efficient greater than 10% efficiencies for changes up 0.5 nm, more twenty times the resonators line-width. observed change efficiency agrees well theory bright coherent light demonstrations. These results will enable quantum optical...

Spatiotemporal patterns of large-scale spiking and field potentials the rodent hippocampus encode spatial representations during maze runs, immobility, sleep. Here, we show that multisite hippocampal potential amplitude at ultra-high-frequency band (FPAuhf), a generalized form multiunit activity, provides not only fast reliable reconstruction rodent's position when awake, but also readout replay content sharp-wave ripples. This FPAuhf feature may serve as robust real-time decoding strategy...

Adiabatic 3-dB couplers based on highly confined silicon waveguides are studied and experimentally demonstrated. The inherently broadband insensitive to fabrication imperfections, which enables reliable photonic circuits.

In this paper, a novel high-sensitivity temperature sensor with two sensing regions based on optical microfiber coupler interferometer (OMCI) for ocean application is proposed. The OMCI constructed by connecting Faraday mirrors to the ports of respectively. Its characteristics analysis and experimental test are conducted. Using broad-spectrum light source as input light, demodulation can be implemented tracking drift characteristic wavelength (dip or peak wavelength) reflection spectrum....

In this work we propose a high-speed hybrid optical-time-division-multiplexing (OTDM) and wavelength-division-multiplexing (WDM) system that seamlessly generates high bit-rate data (>200Gbit/s) from low speed (5Gbit/s) quantum-dot mode locked laser pulse train. The output can be generated using electro-optical micro-ring modulators operate as (5Gbit/s). By utilizing time wavelength domains, the proposed design is promising solution for high-speed, compact low-power consumption optical...

Increasing evidence has shown that intelligence quotient (IQ) depends not only on the aspect of phenomenology such as size brain and sexuality but also topology network. We here try to get a deeper understanding by asking how running mode network influences IQ. introduce parameter α represent trade-off between wiring cost processing efficiency figure out optimal value approach reconstruction. A negative correlation index IQ is revealed. To further find mechanism for functional difference...

Explosive synchronization in networked second-order Kuramoto oscillators has been well studied recently and it is revealed that the process featured by cluster explosive synchronization. However, little attention paid to influence of noise or perturbation. We here study this problem discuss influences For former, we interestingly find significant on those nodes with smaller degrees, i.e., their will change from first-order transition critical points for both forward backward depend strength...

F-shaped nanoslits were arranged linearly and circularly to manipulate surface plasmon polaritons (SPPs) using circular polarization illumination. Numerical calculations show that when are arranged, the electric field distribution follows unidirectional stripe-shaped patterns. Focusing is observed with a arrangement of under illumination specific handedness. For latter geometry, fields greatly enhanced converge inside circle. These results relevant for design nanophotonic devices...

We suggest a novel method to calculate the initial phase difference between two fibre arms of laser homodyne interferometer. Put in temperature controller, whose short term stability is 0.02°C (measured an hour), then measure interference photocurrent and photocurrents from at fixed temperature. With these three we can value difference. set up simple interferometer test theory. The experimental results are repeatable measurement precision about 0.04°. It theoretically experimentally proven...

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text L. Cao, A. Aboketaf, K. Narayanan, Elshaari, S. Kowsz, E. Freeman, McDermott, F. Preble, J. Bickford, and N. Bambha, "Direct Observation of DC Kerr Electro-Optic Modulation using Silicon Nanocrystals," in Frontiers Optics 2012/Laser Science XXVIII, OSA Technical Digest (online) (Optica Publishing Group, 2012), paper FTu1A.5. Export BibTex Endnote (RIS) HTML Plain Video...

A microfiber coupler conbined SAGNAC loop is fabricated for seawater temperature and salinity sensing experiment. The experimental results show that the sensitivity high, its dynamic range can meet marine environment monitoring demand.

Theoretically analyzed and experimentally demonstrated an all-fiber pressure sensor based on a microfiber coupler combined SAGNAC loop. The work of this paper proves the usability structure in deep sea environment.

The authors describe the determination of root-mean-square (RMS) roughness hand-lapped stainless steel specimens using scattered intensity measured by a set detectors spaced along circular arc. ratio between specular beam and total light is used to determine RMS roughness. explain what information obtained from surface profiles taken with stylus instrument scattering data DALLAS instrument. Using an approximate scalar theory electromagnetic random rough surfaces they compute as function...

Here we demonstrate adiabatic wavelength conversion at the single photon level with very low noise and high efficiency. This result is expected to enable in future quantum optical systems.