You can limit the network usage with one of the many predefined values. Bear in mind that you will be setting a value in KB/s or MB/s (kilo- and megabytes) and that there are 8 bits to every byte (network providers usually operate in bits).
You can find the Network limiter in Opera GX in the GX Control panel, which additionally allows you to limit the amount of CPU and RAM used by your browser. Both the CPU and RAM limiters have been improved. They now give you even more detailed control over the limits you set.
Opera Download Speed Limit
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Opera GX features a Twitch panel which lets you follow your favorite streamers directly from your browser and get notified whenever they start to stream. Since the initial version of our browser in June, we have introduced some major improvements to this feature. You can now filter the list of followed channels. Additionally, if you hover your mouse over one of your followed streamers, the browser will display the cover of the game they are currently playing.
Opera's free VPN, Ad blocker, and Flow file sharing. Just a few of the must-have features built into Opera for faster, smoother and distraction-free browsing designed to improve your online experience.
I am using a STM32H745ZI in a project and have USART1 configured as a UART. I updated STM32CubeMX to version 6.2.0 today and the clock page is telling me that "USART1,6 clock source frequency must be
The only place where I think this can come from is as follows. I am using VOS2, and in the device specific datasheet DS12923, table 23 on page 111 says that the maximum APB clock frequency in VOS2 is 75 MHz.
Firstly, I think this is a bug in CubeMX because RM0399 states on page 2197 that "There is no constraint between usart_pclk and usart_ker_ck: usart_ker_ck can be faster or slower than usart_pclk. The only limitation is the software ability to manage the communication fast enough.". I cannot find any documentation that says USART1 kernel clock must be limited to 75 MHz.
Secondly it got me wondering, how stringent that table is to a maximum limit - it's not in the "Absolute maximum limits" section of the document. The table 23 just seems to be taking the maxmimum core frequencies and then setting the dividers so it comes into the allowed range (e.g. maximum CPU1 clock at 300MHz then the dividers need to be set so that APB clock comes out to 75 MHz). In my case I have CPU1 clock at 200 MHz and the dividers allow me to set 100 MHz on e.g. APB. And it has been "working" in that configuration for the last year. But now I'm curious, if I am violating the maximum APB frequency, what do I need to look out for in terms of problems? Excessive junction temperature? Excess current draw from SMPS, causing a brownout? Wouldn't those be offset by the lower CPU frequencies? Are those just the operating conditions used to evaluate the peripheral performace in the sections that follow?
Outside the "General Operating Conditions" it may or may not work. If you are not at the temperature extremes and running at nominal voltage, chances are good that you can use e.g. even substantial higher freequency, but do no expect it to work in all cases.
With everything being online these days, we need browsers rich in features to ensure our tasks are carried out smoothly, with just a click or two. But a bouquet of advanced features comes at a price. While web browsers with advanced features are free to use, the extra features overburden our available system resources, and we end up getting sluggish performance, when we use our web browsers for extensive surfing or similar tasks.
While this might not bother most users, there is a class of pro-users or gamers, who might find it annoying. Thankfully, you can use the Opera GX web browser, which primarily targets gamers, but even general users can control how much of the hardware resources are being allotted and used for the entire browser. That way, websites that unnecessarily hog hardware and network resources can stay within limits.
As network bandwidth is an important aspect if you are not sure about how much bandwidth should the Opera GX web browser use, the bandwidth limits are categorized for different use-case scenarios. Just set the bandwidth limit based on how you want to use Opera GX like video calling, watching videos in SD, i.e. 480p, HD, i.e. 1080p, or 4K videos, etc.
However, if you close the browser, and open it again, the limits will be reset. You can again set new limits, or use the Opera GX web browser in its full glory without any restrictions imposed. Besides the ability to use the Opera GX RAM limiter, or limit network bandwidth in Opera GX, there are additional features too to improve your overall experience. You can tweak the look and feel of Opera GX extensively, and make it look exactly the way you want, along with a free VPN, which is moderately good.
It is also possible to set a processor speed limit using Opera GX. When all the restrictions are in place you can easily get rid of the restrictions again by disabling the limits imposed on the browser.
The OPERA result is based on the observation of over 15000 neutrino events measured at Gran Sasso, and appears to indicate that the neutrinos travel at a velocity 20 parts per million above the speed of light, nature's cosmic speed limit. Given the potential far-reaching consequences of such a result, independent measurements are needed before the effect can either be refuted or firmly established. This is why the OPERA collaboration has decided to open the result to broader scrutiny. The collaboration's result is available on the preprint server arXiv ( -ex/new).
"This result comes as a complete surprise," said OPERA spokesperson, Antonio Ereditato of the University of Bern. "After many months of studies and cross checks we have not found any instrumental effect that could explain the result of the measurement. While OPERA researchers will continue their studies, we are also looking forward to independent measurements to fully assess the nature of this observation."
"When an experiment finds an apparently unbelievable result and can find no artefact of the measurement to account for it, it's normal procedure to invite broader scrutiny, and this is exactly what the OPERA collaboration is doing, it's good scientific practice," said CERN Research Director Sergio Bertolucci. "If this measurement is confirmed, it might change our view of physics, but we need to be sure that there are no other, more mundane, explanations. That will require independent measurements."
In order to perform this study, the OPERA Collaboration teamed up with experts in metrology from CERN and other institutions to perform a series of high precision measurements of the distance between the source and the detector, and of the neutrinos' time of flight. The distance between the origin of the neutrino beam and OPERA was measured with an uncertainty of 20 cm over the 730 km travel path. The neutrinos' time of flight was determined with an accuracy of less than 10 nanoseconds by using sophisticated instruments including advanced GPS systems and atomic clocks. The time response of all elements of the CNGS beam line and of the OPERA detector has also been measured with great precision.
"We have established synchronization between CERN and Gran Sasso that gives us nanosecond accuracy, and we've measured the distance between the two sites to 20 centimetres," said Dario Autiero, the CNRS researcher who will give this afternoon's seminar. "Although our measurements have low systematic uncertainty and high statistical accuracy, and we place great confidence in our results, we're looking forward to comparing them with those from other experiments."
"The potential impact on science is too large to draw immediate conclusions or attempt physics interpretations. My first reaction is that the neutrino is still surprising us with its mysteries." said Ereditato. "Today's seminar is intended to invite scrutiny from the broader particle physics community."
The OPERA experiment was inaugurated in 2006, with the main goal of studying the rare transformation (oscillation) of muon neutrinos into tau neutrinos. One first such event was observed in 2010, proving the unique ability of the experiment in the detection of the elusive signal of tau neutrinos.
In OPERA-2, which ran from October 22nd to November 6th, the number of neutrinos sent from CERN toward Gran Sasso was about 40,000,000,000,000,000 or so. This required over 100,000 pulses of about 300,000,000,000 neutrinos each. Over this 16 day period, OPERA detected about 35 neutrinos, of which 20 were detected well enough to measure them in detail. What you learn from this is important: for most pulses of neutrinos sent from CERN to OPERA, not a single one of those neutrinos hit anything in (or near) OPERA at all.
Look at Figure 3. This is an entirely different technique: pulses only 3 nanoseconds long, and separated by hundreds of nanoseconds. That makes the pulses much shorter than, and the gaps between them much longer than, the 60 nanosecond early-arrival that OPERA-1 observed. So if OPERA-1 were correct, what would we expect? Instead of a window of expected arrival 10000 nanoseconds long for each pulse, OPERA would now have a window of expected arrival only 3 nanoseconds long. If neutrinos were to travel fast enough to arrive 60 nanoseconds early, then each pulse from CERN would enter and entirely exit OPERA long before the window of expected arrival even opened up. In short, if any speeding neutrino from the pulse were to be detected in OPERA, it would inevitably arrive early compared to the window of expectation, rather than, as in OPERA-1, typically inside the window. 152ee80cbc
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