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The on-line textbook: Information Theory, Inference, and Learning Algorithms, by David J.C. MacKay, contains chapters on elementary error-correcting codes; on the theoretical limits of error-correction; and on the latest state-of-the-art error-correcting codes, including low-density parity-check codes, turbo codes, and fountain codes.
On December 4, 2018, Flutter 1.0 was released at the Flutter conference in London. [31] On May 6, 2020, the Dart software development kit version 2.8 and Flutter 1.17.0 were released, adding support for the Metal API. [32] On March 3, 2021, Google released Flutter 2 during an online Flutter Engage event.
In July 2007, less than a month after the original iPhone was released, a member of MacRumors named jorsuss started a thread titled "I dropped my iPhone in water". They covered the phone in rice, which may have been the first documented attempt to use the procedure on an iPhone. [1]
The optimization that removes unreachable code is known as dead code elimination. Code may become unreachable as a consequence of transformations performed by an optimizing compiler (e.g., common subexpression elimination). In practice the sophistication of the analysis has a significant impact on the amount of unreachable code that is detected.
Moisture sensitivity levels are specified in technical standard IPC/JEDEC Moisture/reflow Sensitivity Classification for Nonhermetic Surface-Mount Devices. [1] The times indicate how long components can be outside of dry storage before they have to be baked to remove any absorbed moisture. MSL 6 – Mandatory bake before use; MSL 5A – 24 hours
Moisture vapor transmission rate (MVTR), also water vapor transmission rate (WVTR), is a measure of the passage of water vapor through a substance. It is a measure of the permeability for vapor barriers. There are many industries where moisture control is critical.
The main purpose of the liquid contact indicator is to have a lead to the cause of a defect in electronic devices. The manufactuer will not conduct a repair under warranty for a device with an activated LCI. [1] Still there can be reasons for doubt. Longer, but not extreme exposure of a device in a humid environment, can trigger a LCI ...
A gravimetric hygrometer extracts the water from the air (or other gas) and weighs it separately, for example by weighing a desiccant before and after it has absorbed the water. The temperature, pressure and volume of the resulting dry gas are also measured, providing enough information to calculate the amount of water per mole of gas. [8] [9]