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.
World Time Buddy (WTB) is a convenient world clock, a time zone converter, and an online meeting scheduler. It's one of the best online productivity tools for those often finding themselves traveling, in flights, in online meetings or just calling friends and family abroad.
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.)
The currency converter uses ECB reference exchange rates (source dataset "EXR") and all exchange rates provided by Bloomberg (source dataset "FX"). ECB reference exchange rates take precedence over Bloomberg rates.
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...
The California Air Resources Board, with assistance from aftermarket catalytic converter manufacturers, has been developing a database to store and retrieve information on aftermarket catalytic converters that have been approved for use in California. These catalytic converters comply with the new regulations that became effective January 1, 2009. The database is currently under construction and contains some of the catalytic converters approved for OBD II vehicles. Once finalized, it will also include catalytic converters for non-OBD II vehicles.
*Toyota: Please follow this link to see catalytic converters that are legal on 2001-2004 4.7 liter Toyota Sequoia and 2003-2004 4.7 liter Toyota Tundra. to see catalytic converters that are legal on 2001-2004 4.7 liter Toyota Sequoia and 2003-2004 4.7 liter Toyota Tundra.
To access Executive Orders that are not shown in the database, please view the complete list of approved catalytic converters under the new regulations. Also, to access Executive Orders for only pre-OBD II vehicles under the new regulations please view the Pre-OBD II EO Listing.
For information on Executive Orders issued under the old regulations, view the summary list. All Executive Orders on this summary list are void and no longer in force and effect. The catalytic converters they cover cannot be sold in California effective December 31, 2008. Likewise, the used catalytic converters they covered cannot be sold in California effective July 10, 2008.
Please note that the database and lists are applicable to passenger cars, light-duty trucks, and medium-duty vehicles only. Executive Orders for motorcycle aftermarket catalytic converters can be viewed in the Motorcycle Aftermarket Parts Page.
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
Located in Astoria, Queens, construction on the converter station officially began on June 22, including significant remediation work that was required to prepare the site for construction of this zero-emissions facility. In total, six tanks which previously stored 12 million gallons of No. 6 oil, as well as nearly four miles of piping were removed from the site. During peak construction, approximately 150 union workers will develop the facility with Kiewit Corporation as lead contractor for the site, which is expected to begin operating in 2026.
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