Because the wavelengths at which the images were taken do not correspond to the wavelengths of red, green and blue light, the colours in the final image only give an approximate representation of the actual colours of the galaxies in the image ; the choice of filters for the HDF ( and the majority of Hubble images ) was primarily designed to maximize the scientific utility of the observations rather than to create colours corresponding to what the human eye would actually perceive.

" Nephros can now offer the only on-line HDF therapy available in the U. S .," said John C. Houghton, President & CEO of Nephros, Inc.

Hardboard, also called high-density fiberboard ( HDF ), not to be confused with ' hardwood ', is a type of fiberboard, which is an engineered wood product.

HDF is a project to specify the processes and methodology used by all the HL7 committees for project initiation, requirements analysis, standard design, implementation, standard approval process, etc.

In keeping with this goal, the HDF format, libraries and associated tools are available under a liberal, BSD-like license for general use.

The Reference Information Model ( RIM ) and the HL7 Development Framework ( HDF ) are the basis of the HL7 Version 3 standards development process.

The HDF is the most current edition of the HL7 V3 development methodology.

Originally developed at the National Center for Supercomputing Applications, it is currently supported by the non-profit HDF Group, whose mission is to ensure continued development of HDF5 technologies, and the continued accessibility of data currently stored in HDF.

In all, the HDF is thought to contain fewer than twenty galactic foreground stars ; by far the majority of objects in the field are distant galaxies.

Eventually, the HDF will encompass all of the HL7 standard specifications, including any new standards resulting from analysis of electronic health record architectures and requirements.

The HL7 Version 3 Development Framework ( HDF ) is a continuously evolving process that seeks to develop specifications that facilitate interoperability between healthcare systems.

The v3 standard, as opposed to version 2, is based on a formal methodology ( the HDF ) and object-oriented principles.

* Skin-The front and back faces of the door are covered with HDF / MDF skins.

For large volume scientific datasets, such as satellite data and output of numerical climate, weather, or ocean models, specific binary serialization standards have been developed, e. g. HDF, netCDF and the older GRIB.

HDF laminate consists of high density fiberboard topped by one or more layers of decorative paper and a transparent protective layer.

The Hubble Deep Field ( HDF ) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope.

By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 800 citations by the end of 2008.

Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South.

The HDF is at the centre of this image of one degree ( angle ) | degree of sky.

Radio snapshot observations with the VLA ruled out one of these fields because it contained a bright radio source, and the final decision between the other two was made on the basis of the availability of guide stars near the field: Hubble observations normally require a pair of nearby stars on which the telescope's Fine Guidance Sensors can lock during an exposure, but given the importance of the HDF observations, the working group required a second set of back-up guide stars.

The HDF was located in Hubble's northern Continuous Viewing Zone, as shown by this diagram.

The choice of filters to be used for the HDF depended on the ' throughput ' of each filter — the total proportion of light that it allows through — and the spectral coverage available.

Scientists involved in the HDF observations pioneered a technique called ' drizzling ', in which the pointing of the telescope was varied minutely between sets of exposures.

The HDF images produced at each wavelength had final pixel sizes of 0. 03985 arcseconds.

There are about fifty blue point-like objects in the HDF.

However, more recent work has found that many white dwarfs become bluer as they age, lending support to the idea that the HDF might contain white dwarfs.

Details from the HDF illustrate the wide variety of galaxy shapes, sizes and colours found in the distant universe.

The HDF data provided extremely rich material for cosmologists to analyse and as of late 2008, the associated scientific paper for the image has received over 800 citations.

Further, there is no mileage charge or mileage limitations when you lease a car, and you pay only the flat monthly rate plus a nominal charge for documents and insurance since the car is registered and insured individually for your trip.

It is a very traditional form of the language, probably derived from medieval deeds and documents, and has a very complicated structure and vocabulary which is generally reserved only for such documents.

The surname of the Archbishop of Canterbury is not always used in formal documents ; often only the first name and see are mentioned.

* Written documents ; for example, clay tablets and discs ( so far in Crete only ), but nothing of more perishable nature, such as skin, papyrus, etc.

The documents characterize not only the Sakharov's activity, but that of other dissidents, as well as that of highest-position apparatchiks, and the KGB.

The Egyptian identification card controversy began in the 1990s when the government modernized the electronic processing of identity documents, which introduced a de facto requirement that documents must list the person's religion as Muslim, Christian, or Jewish ( the only three religions officially recognized by the government ).

Catullus's poems and the closing section by Suetonius are the only documents in the novel which are not imagined.

The documents of the early Christian church concerning Corsica are in Latin, but they are only communications between church officials ( see under Ajaccio ).

Besides its literary qualities, this poem is important to historians because it is the only record of Joan of Arc outside the documents of her trial.

" Poll " is an archaic legal term referring to documents with straight edges ; these distinguished a deed binding only one person from one affecting more than a single person ( an " indenture ", so named during the time when such agreements would be written out repeatedly on a single sheet, then the copies separated by being irregularly torn or cut, i. e. " indented ", so that each party had a document with corresponding tears, to discourage forgery ).

Non-validating parsers may eventually attempt to locate these external entities in the non-standalone mode ( by partially interpreting the DTD only to resolve their declared parsable entities ), but will not validate the content model of these documents.

This use allows notations to be defined only in a DTD stored as an external entity and referenced only as the external subset of documents, and allows these documents to remain compatible with validating XML or SGML parsers that have no direct support for notations.

Most XML schema languages are only replacements for element declarations and attribute list declarations, in such a way that it becomes possible to parse XML documents with non-validating XML parsers ( if the only purpose of the external DTD subset was to define the schema ).

Etruscan was superseded completely by Latin, leaving only a few documents and some loanwords in Latin, such as persona ( from Etruscan φersu ), and some place-names, such as Roma.

A large part of what is known about the beliefs of heresies comes from the documents quoted in councils in order to be refuted, or indeed only from the deductions based on the refutations.

* Avi used this style of constructing a story in Nothing But the Truth ( 1991 ), where the plot is told using only documents, letters, and scripts.

However, his relatives were not major court officials ; documents show that El Cid's paternal grandfather, Lain, confirmed only five documents of Ferdinand I's, his maternal grandfather, Rodrigo Alvarez, certified only two of Sancho II's, and El Cid's own father confirmed only one.