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Pigmalion Limon
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 guide describes the installation of a digital-to-analog converter box with your current antenna and analog TV. This guide will help you prepare so that when you purchase a converter box you will know what to expect and whether you may need help setting it up.
Supplies: You will need your analog TV, the antenna you have been using (indoor or outdoor), and the coaxial wire that currently connects your antenna to your TV (as pictured on the right). Your new converter box will come with a coaxial wire and a remote control. Before you begin the installation of the converter box, you should unplug your TV.
For instructions on how to connect your converter box if it does not include an analog pass-through feature or for instructions on connecting your converter box to other components such as a VCR, go to www.fcc.gov/digital-television or contact the FCC by calling 1-888-CALL-FCC (1-888-225-5322) voice or 1-888-TELL-FCC (1-888-835-5322) TTY.
Technology Level 3: A DEEC-Tec-based ocean wave energy converter is an example of an energy harnessing/converting structure made of DEEC-Tec metamaterials. DEEC-Tec-based wave energy converters have two defining characteristics:
NREL has extensive experience in developing materials 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.
NREL is familiar with and has the experience necessary for the co-design of DEEC-Tec-based ocean wave energy converters. Inherent in their nature, DEEC-Tec-based converters require the co-design and concurrent engineering of, at minimum:
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.)
InforEuro provides rates for current and old currencies for countries both inside and outside the European Union. For each currency, the converter provides the historic rates of conversion against the euro (or, until December 1998, against the ecu). These exchange rates are available in electronic format from March 1994 in the form of downloadable files.
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.
Dear Shawn,
Thank you very much for the response These are the equations I have used to compute for my RLC and duty cycle to be in CCM. Sorry that I forgot to mention that my boost converter is operating in CCM. Below are the provided Transient Response of the Inductor current with the PWM.
Your first equation ignores all the parasitic elements in the converter. Hence, I am concerned you may expect performance that is not consistent with your expected performance. Thank you for your added waveforms. I took some time to analyze your waveforms and computed what I expect ts output voltage may be. The value I get when I estimate voltage drops for your two switching transistors (vds) and for your inductor real part (rs) is quite close to what you are observing. I then optimized the duty cycle to provide a n output voltage of 2.50 V. I included the equations I used. I also double-checked my result using an on-line tool. I included its result and the link in the attached note. I hope this is useful!
If the autoApply element is specified as true, the persistence provider must automatically apply the converter to all mapped attributes of the specified target type for all entities in the persistence unit except for attributes for which conversion is overridden by means of the Convert annotation (or XML equivalent). In determining whether a converter is applicable to an attribute, the provider must treat primitive types and wrapper types as equivalent. Note that Id attributes, version attributes, relationship attributes, and attributes explicitly annotated as Enumerated or Temporal (or designated as such via XML) will not be converted. Note that if autoApply is true, the Convert annotation may be used to override or disable auto-apply conversion on a per-attribute basis. If autoApply is false, only those attributes of the target type for which the Convert annotation (or corresponding XML element) has been specified will be converted. If there is more than one converter defined for the same target type, the Convert annotation should be used to explicitly specify which converter to use.Since:Java Persistence 2.1See Also:AttributeConverter, ConvertOptional Element SummaryOptional Elements Modifier and TypeOptional Element and DescriptionbooleanautoApply Element DetailautoApplypublic abstract boolean autoApplyDefault:falseSkip navigation links
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