Phys.org: Ytterbium atomic clock could open a new window on fundamental physics
For the first time, an international team of physicists has successfully harnessed a rare orbital transition in atoms of ytterbium to create a new type of atomic clock that is both highly precise and ...
A low-noise chip-scale atomic clock (LN-CSAC), the SA65-LN from Microchip, features a profile height of less than 0.5 in. (12.7 mm). Aimed at aerospace and defense applications where size, weight, and ...
Objects of atomic types are the only C++ objects that are free from data races; that is, if one thread writes to an atomic object while another thread reads from it, the behavior is well-defined. In addition, accesses to atomic objects may establish inter-thread synchronization and order non-atomic memory accesses as specified by std::memory_order.
I had a 25-hr debugging marathon in < 2 days and then wrote this answer here. See also the bottom of this question for more info. and documentation on 8-bit variables having naturally atomic writes and naturally atomic reads for AVR 8-bit microcontrollers when compiled with the gcc compiler which uses the AVR-libc library.
Which types on a 64-bit computer are naturally atomic in gnu C and gnu ...
2 We are currently evaluating 128-bit atomic operation support across platforms and compilers, and I wanted to confirm the level of support available in Clang specifically. Our reference point is the Windows API function InterlockedCompareExchange128, which performs an atomic compare-and-swap on 128-bit values. We’re trying to determine:
22 Atomic vs. Non-Atomic Operations "An operation acting on shared memory is atomic if it completes in a single step relative to other threads. When an atomic store is performed on a shared memory, no other thread can observe the modification half-complete.
There are several questions on SO dealing with atomic, and other that deal with std::condition_variable. But my question if my use below is correct? Three threads, one ctrl thread that does prepar...
There are two atomic CAS operations in C++11: atomic_compare_exchange_weak and atomic_compare_exchange_strong. According to cppreference: The weak forms of the functions are allowed to fail spurio...
In addition (and more importantly), note that std::atomic must support all operations for all possible data types, so even if you declare a ten million byte struct, you can use compare_exchange on this.
Are C/C++ fundamental types, like int, double, etc., atomic, e.g. threadsafe? Are they free from data races; that is, if one thread writes to an object of such a type while another thread reads fr...
When can 64-bit writes be guaranteed to be atomic, when programming in C on an Intel x86-based platform (in particular, an Intel-based Mac running MacOSX 10.4 using the Intel compiler)? For exampl...
11 The difference is that a normal load/store is not guaranteed to be tear-free, whereas a relaxed atomic read/write is. Also, the atomic guarantees that the compiler doesn't rearrange or optimise-out memory accesses in a similar fashion to what volatile guarantees. (Pre-C++11, volatile was an essential part of rolling your own atomics.
c++ - What is the difference between load/store relaxed atomic and ...
So, this means that Richard Barry is saying that 4-byte reads and writes are atomic on these 32-bit microcontrollers. This means that he, at least, is 100% sure 4-byte reads and writes are atomic on STM32. He doesn't mention smaller-byte reads, but for 4-byte reads he is conclusively sure.
expert (third-person singular simple present experts, present participle experting, simple past and past participle experted) (transitive) To have (something) reviewed or checked by an expert. quotations
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CU Boulder News & Events: How to Update CU Experts Profile Data
The Smithsonian has introduced Smithsonian Profiles, a searchable directory of the Smithsonian’s scholarly experts. The Smithsonian’s dedication to research supports hundreds of staff scholars, and ...
The list of possible ways CU Experts could be used by the campus and those interested in research and faculty expertise at CU Boulder includes the following: As CU Experts is used, undoubtedly more ...
Never Explain wins the Tampa Bay Stakes on Saturday, at Tampa Bay Downs SV Photography Winning Connections with Never Explain with Flavien Prat wins the Dinner Party (G3T) at Pimlico, ...
explain, expound, explicate, elucidate, interpret mean to make something clear or understandable. explain implies a making plain or intelligible what is not immediately obvious or entirely known.
EXPLAIN meaning: 1. to make something clear or easy to understand by describing or giving information about it: 2…. Learn more.
To explain is to make plain, clear, or intelligible something that is not known or understood: to explain a theory or a problem. To elucidate is to throw light on what before was dark and obscure, usually by illustration and commentary and sometimes by elaborate explanation: They asked him to elucidate his statement.
Explain, elucidate, expound, interpret imply making the meaning of something clear or understandable. To explain is to make plain, clear, or intelligible something that is not known or understood: to explain a theory or a problem.
Synonyms: explain, elucidate, explicate, interpret, construe These verbs mean to make the nature or meaning of something understandable. Explain is the most widely applicable: The professor used a diagram to explain the theory of continental drift. The manual explained how the new software worked.
Explain is the most general of these words, and means to make plain, clear, and intelligible. Expound is used of elaborate, formal, or methodical explanation: as, to expound a text, the law, the philosophy of Aristotle.
EXPLAIN definition: to make plain or clear; render understandable or intelligible. See examples of explain used in a sentence.
explain (third-person singular simple present explains, present participle explaining, simple past and past participle explained) (transitive) To make plain, manifest, or intelligible; to clear of obscurity; to illustrate the meaning of.
to make clear in speech or writing; make plain or understandable by analysis or description. The instructor explained the operation of the engine to the students.