Quantum memories, capable of controllably storing and releasing a photon, are a crucial component for quantum computers1 and quantum communications2. To date, quantum memories3,4,5,6 have operated with bandwidths that limit data rates to megahertz. Here we report the coherent storage and retrieval of sub-nanosecond low-intensity light pulses with spectral bandwidths exceeding 1 GHz in caesium vapour. The novel memory interaction takes place through a far off-resonant two-photon transition in which the memory bandwidth is dynamically generated by a strong control field7,8. This should allow data rates more than 100 times greater than those of existing quantum memories. The memory works with a total efficiency of 15%, and its coherence is demonstrated through direct interference of the stored and retrieved pulses. Coherence times in hot atomic vapours are on the order of microseconds9, the expected storage time limit for this memory.

To their amazement, they found that motor memories lasting less than a minute displayed faster relearning even after nearly an hour of extinction training and, counterintuitively, memories lasting more than a minute displayed slower relearning. Despite that, memories persisting for over a minute predicted memory retention 24 hours later, while motor memories lasting less than a minute did not.


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Memory Speed: The amount of time that it takes RAM to receive a request from the processor and then read or write data. Generally, the faster the RAM, the faster the processing speed.

With faster RAM, you increase the speed at which memory transfers information to other components. Meaning, your fast processor now has an equally fast way of talking to the other components, making your computer much more efficient.

RAM speed is measured in Megahertz (MHz), millions of cycles per second so that it can be compared to your processor's clock speed. For Dell desktops and laptops, memory speed can range from the standard 1333 MHz all the way up to speeds of 2133 MHz. The speed of your processor and the bus speed of the computer motherboard is the limiting factors on the speed of RAM installed in your computer. RAM upgrades are limited by the capability of the computer and the availability of expansion slots for adding RAM. Often, upgrading RAM may involve replacing existing RAM modules with larger modules that are again limited by the capability of the computer.

DDR4 memory is the latest generation of memory for computing applications and offers many benefits over previous generations of memory including lower latencies, higher speeds, and more. One thing to keep in mind is that memory needs to be the same type - memory modules are not forward or backward compatible in terms of generation types so DDR3 will not work in DDR2 or DDR4.

Memory is designed to be backward compatible within its generation, so generally speaking, you can safely add faster memory to a computer that was designed to run slower memory. However, your system will operate at the speed of the slowest memory module installed.


PC66 memory is SDRAM designed for use in systems with a 66MHz front-side bus. It is used in the Pentium 133MHz systems and Power Macintosh G3 systems. FPM and EDO speeds are written in nanoseconds (ns), which indicates their access time; the lower the number, the faster the memory (it takes fewer nanoseconds to process data).

In the Photos app , you can edit your memories to make them even more personal. Try out Memory mixes, which let you apply different songs with a matching photographic look. You can also choose new songs, edit the title of a memory, change the length, and add, reorder, or remove photos. Apple Music subscribers can add songs from the millions of songs available in the Apple Music catalog.

I'm setting up a new system with MOBO ASUS Pro WS X299 SAGE II ( -Servers-Workstations/Pro-WS-X299-SAGE-II/) and bought the following Corsair Vengeance memory already a while ago (it was a really good special in amazon.co.uk): -LPX/p/CMK32GX4M4K4133C19 judging by the memory base speed I'd get effectively without OC 4133Mhz read-write speeds using these modules. But since I have 8 RAM module slots available and would like to be on the 256GB side I was re-thinking which RAM I'd use.

It would seem that this is the best RAM Corsair could offer for my system and as I understand Dominator is the top line from Corsair but how come it is only 3200Mhz and the Vengeance I already got is 4133Mhz. I am confused, will the Dominator version be nevertheless faster despite the lower base speeds specs of 3200Mhz???

Thanks a lot for your detailed feedback and help, this is an eye opener for me. I thought that if RAM models matched perfectly e.g. as you mention abc123, I could combine those or even buy one set today, wait for the price to decrease in the future and buy a second set, but this seems not to be the case. Actually I understand now I got myself into that issue with my current built where I initially bought 16GB DDR3 of model CMT16GX3M4X2133C9, then after 5 years got a second CMT16GX3M4X2133C9 and had to fight with the BIOS to get the memories to work without crashing, I even had to lower the OC speeds to the minimum, I had it working at the end but didn't understand why ?

I only buy Intel and nVidia because I work with Intel developer HPC toolkits such as Intel Compilers (C++, fortran), Intel Math Kernel library (MKL) linear Algebra optimized kernels for HPC/ML. I code CUDA as well again to speed up ML algorithms and auto-speed-up frameworks such as numpy, tensorflow, etc. For example, with the current build I have if I run a simple feature selection in sklearn, and a reasonable small data set, I never get an answer back after hours running ?

While there are a number of similarities in comparing my recent travels to Mexico, Costa Rica and now Honduras, there is one that stands out as being particularly important to folks traveling by car. It may not be the most fascinating part of road touring, but it might save time and money from future car repairs. Let me introduce you to the speed bump.

We present an innovative working mechanism (the SBC memory) and surrounding infrastructure (BitBrain) based upon a novel synthesis of ideas from sparse coding, computational neuroscience and information theory that enables fast and adaptive learning and accurate, robust inference. The mechanism is designed to be implemented efficiently on current and future neuromorphic devices as well as on more conventional CPU and memory architectures. An example implementation on the SpiNNaker neuromorphic platform has been developed and initial results are presented. The SBC memory stores coincidences between features detected in class examples in a training set, and infers the class of a previously unseen test example by identifying the class with which it shares the highest number of feature coincidences. A number of SBC memories may be combined in a BitBrain to increase the diversity of the contributing feature coincidences. The resulting inference mechanism is shown to have excellent classification performance on benchmarks such as MNIST and EMNIST, achieving classification accuracy with single-pass learning approaching that of state-of-the-art deep networks with much larger tuneable parameter spaces and much higher training costs. It can also be made very robust to noise. BitBrain is designed to be very efficient in training and inference on both conventional and neuromorphic architectures. It provides a unique combination of single-pass, single-shot and continuous supervised learning; following a very simple unsupervised phase. Accurate classification inference that is very robust against imperfect inputs has been demonstrated. These contributions make it uniquely well-suited for edge and IoT applications.

Spintronics devices, which exploit the spin of an electron as well as its charge, could be ideal for use in high-density data storage devices and for next generation information processing. One promising technology involves using magnetic solitons, such as nanoscale domain walls and magnetic skyrmions, which can function as mobile bits, to encode information, and then moving these bits using a current in devices known as racetracks. The main challenges here are to make smaller bits and then efficiently move these at high speeds. Until now, researchers mainly focused on ferromagnetic materials to make such bits, but these unfortunately have their limitations for when it comes to how small they can be made and the speed at which they can be moved. Material scientists and physicists in the US and Germany say they have now found a way to overcome this problem by using ferrimagnets instead. This new class of materials allow for order-of-magnitude improvements in speed and size and means that the technology might now be brought to market in a reasonably short timeframe.

Among the hypotheses, researchers have shown that the eye movements in EMDR activate the parasympathetic nervous system, leading to a slowing of breathing and heart rate, and a reduction in arousal; others have shown that the eye movements compete with the recall of traumatic memories, making them less vivid and emotional; others still have suggested that the eye movements activate the same neurological processes that occur during rapid eye movement (REM) sleep, when our most intense dreaming occurs, leading to less negative emotions, new associations between memories, increased cognitive flexibility, and improved insight.

EMDR is now being used to treat people suffering from a range of disorders. It is no longer regarded as just a treatment for adults with identifiable traumas or those who meet strict criteria for a diagnosis of PTSD. There is mounting evidence supporting the use of EMDR therapy for the treatment of traumatised children, survivors of recent traumas, and those with complex post-traumatic stress disorder, most often diagnosed in patients with histories of prolonged and repeated trauma that started at an early age. And moving beyond obvious trauma-related disorders, there is now research that supports the use of EMDR with anxiety disorders, unipolar depression, pain, addictions, obsessive compulsive disorder, bipolar disorder, and psychosis. EMDR is being used in inpatient and outpatient settings, medical hospitals, schools, prisons, the military, and in the field after major disasters and crises. After all, unprocessed trauma memories, still locked in the nervous system, can exacerbate, trigger or even cause many of these problems and disorders. 17dc91bb1f

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