Converter

Converter

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The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z).Literally speaking the epoch is Unix time 0 (midnight 1/1/1970), but 'epoch' is often used as a synonym for Unix time.Some systems store epoch dates as a signed 32-bit integer, which might cause problems on January 19, 2038 (known as the Year 2038 problem or Y2038).The converter on this page converts timestamps in seconds (10-digit), milliseconds (13-digit) and microseconds (16-digit) to readable dates.

This free online file converter lets you convert media easy and fast from one format to another. We support a lot of different source formats, just try. If you can't find the conversion you need, please let us know and write us an e-mail. We probably can help you...

In the String Formatting article, you saw how you can use the StringFormat property of a data binding to convert any type into a string. For other types of conversions, you need to write some specialized code in a class that implements the IValueConverter interface. (The Universal Windows Platform contains a similar class named IValueConverter in the Windows.UI.Xaml.Data namespace, but this IValueConverter is in the Xamarin.Forms namespace.) Classes that implement IValueConverter are called value converters, but they are also often referred to as binding converters or binding value converters.

The Enable Buttons page in the Data Binding Demos sample demonstrates how to use this value converter in a data binding. The IntToBoolConverter is instantiated in the page's resource dictionary. It is then referenced with a StaticResource markup extension to set the Converter property in two data bindings. It is very common to share data converters among multiple data bindings on the page:

The Enable Buttons page demonstrates a common need when a Button performs an operation based on text that the user types into an Entry view. If nothing has been typed into the Entry, the Button should be disabled. Each Button contains a data binding on its IsEnabled property. The data-binding source is the Length property of the Text property of the corresponding Entry. If that Length property is not 0, the value converter returns true and the Button is enabled:

Some value converters are written specifically for particular applications, while others are generalized. If you know that a value converter will only be used in OneWay bindings, then the ConvertBack method can simply return null.

You can write value converters to be more generalized and to accept several different types of data. The Convert and ConvertBack methods can use the as or is operators with the value parameter, or can call GetType on that parameter to determine its type, and then do something appropriate. The expected type of each method's return value is given by the targetType parameter. Sometimes, value converters are used with data bindings of different target types; the value converter can use the targetType argument to perform a conversion for the correct type.

The Switch Indicators page demonstrates how it can be used to display the value of a Switch view. Although it's common to instantiate value converters as resources in a resource dictionary, this page demonstrates an alternative: Each value converter is instantiated between Binding.Converter property-element tags. The x:TypeArguments indicates the generic argument, and TrueObject and FalseObject are both set to objects of that type:

The Binding class defines a ConverterParameter property, and the Binding markup extension also defines a ConverterParameter property. If this property is set, then the value is passed to the Convert and ConvertBack methods as the parameter argument. Even if the instance of the value converter is shared among several data bindings, the ConverterParameter can be different to perform somewhat different conversions.

To display these as hexadecimal values in XAML, they must be multiplied by 255, converted to an integer, and then formatted with a specification of \"X2\" in the StringFormat property. The first two tasks (multiplying by 255 and converting to an integer) can be handled by the value converter. To make the value converter as generalized as possible, the multiplication factor can be specified with the ConverterParameter property, which means that it enters the Convert and ConvertBack methods as the parameter argument:

The Convert converts from a double to int while multiplying by the parameter value; the ConvertBack divides the integer value argument by parameter and returns a double result. (In the program shown below, the value converter is used only in connection with string formatting, so ConvertBack is not used.)

The DEEC-Tec domain centers on combining many small energy converters into a single structure that harvests a much broader range of ocean wave energy than conventional approaches. One of the most innovative elements of DEEC-Tec is its ability to create flexible ocean wave energy converters, sometimes known as flexWECs. Such devices can stretch, twist, bend, expand, or undergo other structural deformations that, in turn, enable them to extract energy from the movement of ocean waves via numerous small distributed embedded energy converters.

DEEC-Tec-based devices (or flexWECs) do not have discrete joints or mechanical hinging mechanisms. The individual energy converters are simply very small transducers, which use dynamic structural deformation as their input and electricity, for example, as their output. These transducers can leverage any technique capable of damping or actuating motion within a DEEC-Tec structure. Dielectric elastomer generators, a type of transducer, are one such example.

NREL has extensive experience in developing materials necessary for both FMDEC structures and embedded distributed energy converters. This experience, to name of few, leverages techniques ranging from upcycling of used polymers to the development of novel new elastomer electrodes.

With this online video converter you can upload your mp4, avi, WebM, flv, wmv and many other popular types of video and rich media files to turn them into high-quality animated GIFs. Source video file can be uploaded from your computer or smartphone or fetched from another server by URL.

After upload, you can select the part of the video you want to cut, entering the start and end times. If nothing is selected, the converter will make a GIF from the first five seconds of the video clip.If you want to change the dimensions of the GIF or crop out only part of the video, you can use our resize and crop tools on the GIF after finishing the conversion.

We offer MP4 to GIF, WebM to GIF, AVI to GIF, MOV to GIF, FLV to GIF, as well as 3GP, OGV, M4V, ASF, and other format converters. It's possible to convert transparent video (with alpha channel) to transparent GIF as well. It can also convert some SWF (flash) files, but currently, not all of them.

If you are looking for a tool to perform conversion the other way around (GIF to Video), give our GIF to MP4 or GIF to WebM converter a try.Or if you want to make a GIF from multiple images, use our GIF maker instead.

A catalytic converter is an exhaust emission control device that converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction. Catalytic converters are usually used with internal combustion engines fueled by gasoline or diesel, including lean-burn engines, and sometimes on kerosene heaters and stoves.

The first widespread introduction of catalytic converters was in the United States automobile market. To comply with the U.S. Environmental Protection Agency's stricter regulation of exhaust emissions, most gasoline-powered vehicles starting with the 1975 model year are equipped with catalytic converters.[1][2][3] These \"two-way\" converters combine oxygen with carbon monoxide (CO) and unburned hydrocarbons (HC) to produce carbon dioxide (CO2) and water (H2O). Although two-way converters on gasoline engines were rendered obsolete in 1981 by \"three-way\" converters that also reduce oxides of nitrogen (.mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:left}.mw-parser-output sub.template-chem2-sub{font-size:80%;vertical-align:-0.35em}.mw-parser-output sup.template-chem2-sup{font-size:80%;vertical-align:0.65em}NOx);[4] they are still used on lean-burn engines to oxidize particulate matter and hydrocarbon emissions (including Diesel engines, which typically use lean combustion), as three-way-converters require fuel-rich or stoichiometric combustion to successfully reduce NOx.

Although catalytic converters are most commonly applied to exhaust systems in automobiles, they are also used on electrical generators, forklifts, mining equipment, trucks, buses, locomotives, motorcycles, and on ships. They are even used on some wood stoves to control emissions.[5] This is usually in response to government regulation, either through environmental regulation or through health and safety regulations.

Catalytic converter prototypes were first designed in France at the end of the 19th century, when only a few thousand \"oil cars\" were on the roads; these prototypes had inert clay-based materials coated with platinum, rhodium, and palladium and sealed into a double metallic cylinder.[6] A few decades later, a catalytic converter was patented by Eugene Houdry, a French mechanical engineer. Houdry was an expert in catalytic oil refining, having invented the catalytic cracking process that all modern refining is based on today.[7] Houdry moved to the United States in 1930 to live near the refineries in the Philadelphia area and develop his catalytic refining process. When the results of early studies of smog in Los Angeles were published, Houdry became concerned about the role of smokestack exhaust and automobile exhaust in air pollution and founded a company called Oxy-Catalyst. Houdry first developed catalytic converters for smokestacks, called \"cats\" for short, and later developed catalytic converters for warehouse forklifts that used low grade, unleaded gasoline.[8] In the mid-1950s, he began research to develop catalytic converters for gasoline engines used on cars and was awarded United States Patent 2,742,437 for his work.[9] 59ce067264

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