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.

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

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.

The voice signal can be routed to a POTS provider or left unused whilst the data signal is routed to the ISP DSLAM via the HDF ( see next entry ).

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.

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

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

Hierarchical Data Format ( HDF, HDF4, or HDF5 ) is the name of a set of file formats and libraries designed to store and organize large amounts of numerical data.

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.

HDF is supported by many commercial and non-commercial software platforms, including Java, MATLAB, IDL, Python, and R. The freely available HDF distribution consists of the library, command-line utilities, test suite source, Java interface, and the Java-based HDF Viewer ( HDFView ).

HDF4 is the older version of the format, although still actively supported by The HDF Group.

HDF is self-describing, allowing an application to interpret the structure and contents of a file with no outside information.

Data on the server is often in HDF or NetCDF format, but can be in any format including a user-defined format.

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

* Hôtel-Dieu de France, Beirut Lebanon. HDF is a private hospital owned by the French state and managed by the Université Saint-Joseph.

Nephros's OLpur MD220 Hemodiafilter is a dialyzer designed expressly for HDF therapy that employs Nephros's proprietary Mid-Dilution Hemodiafiltration technology.

Nephros's OLpur MD220 Hemodiafilter is a dialyzer designed expressly for HDF therapy that employs Nephros's proprietary Mid-Dilution Hemodiafiltration technology.

2012, Nephros, Inc. ( NEPH. OB ), a medical device company developing and marketing filtration products for therapeutic applications and advanced water purification solutions, announced the Company had received 510 ( k ) clearance from the Food and Drug Administration (" FDA ") to market its Hemodiafiltration (" HDF ") system for the treatment of chronic renal failure when used with UF controlled dialysis machines capable of producing ultrapure dialysate in accordance with current AAMI / ANSI / ISO standards in the United States.

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

The HDF not only documents messaging, but also the processes, tools, actors, rules, and artifacts relevant to development of all HL7 standard specifications.

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.

* 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.

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.

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.

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.

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.

I want the room in the attic prepared for him He is a most unusual lad, quite precocious in many ways.

In fact it has caused us to give serious thought to moving our residence south, because it is not easy for the most objective Southerner to sit calmly by when his host is telling a roomful of people that the only way to deal with Southerners who oppose integration is to send in troops and shoot the bastards down.

but for this discussion the most important division is between those who have been reconstructed and those who haven't.

But apart from racial problems, the old unreconstructed South -- to use the moderate words favored by Mr. Thomas Griffith -- finds itself unsympathetic to most of what is different about the civilization of the North.

The general acceptance of the idea of governmental ( i.e., societal ) responsibility for the economic well-being of the American people is surely one of the two most significant watersheds in American constitutional history.

Accidental war is so sensitive a subject that most of the people who could become directly involved in one are told just enough so they can perform their portions of incredibly complex tasks.

Even though in most cases the completion of the definitive editions of their writings is still years off, enough documentation has already been assembled to warrant drawing a new composite profile of the leadership which performed the heroic dual feats of winning American independence and founding a new nation.

It is clear that, while most writers enjoy picturing the Negro as a woolly-headed, humble old agrarian who mutters `` yassuhs '' and `` sho' nufs '' with blissful deference to his white employer ( or, in Old South terms, `` massuh '' ), this stereotype is doomed to become in reality as obsolete as Caldwell's Lester.

Presenting an individualized Negro character, it would seem, is one of the most difficult assignments a Southern writer could tackle ; ;

All but the most rabid of Confederate flag wavers admit that the Old Southern tradition is defunct in actuality and sigh that its passing was accompanied by the disappearance of many genteel and aristocratic traditions of the reputedly languid ante-bellum way of life.

Yet often fear persists because, even with the most rigid ritual, one is never quite free from the uneasy feeling that one might make some mistake or that in every previous execution one had been unaware of the really decisive act.

Perhaps the most illuminating example of the reduction of fear through understanding is derived from our increased knowledge of the nature of disease.

The consciousness it mirrors may have come earlier to Europe than to America, but it is the consciousness that most `` mature '' societies arrive at when their successes in technological and economic systematization propel them into a time of examining the not-strictly-practical ends of culture.

And the life they lead is undisciplined and for the most part unproductive, even though they make a fetish of devoting themselves to some creative pursuit -- writing, painting, music.

The music which Lautner has composed for this episode is for the most part `` rather pretty and perfectly banal ''.

Presupposed in Plato's system is a doctrine of levels of insight, in which a certain kind of detached understanding is alone capable of penetrating to the most sublime wisdom.

As long as perception is seen as composed only of isolated sense data, most of the quality and interconnectedness of existence loses its objectivity, becomes an invention of consciousness, and the result is a philosophical scepticism.

And it is precisely in this poorer economic class that one finds, and has always found, the most racial friction.

It is something which most of us try to get out from under.

We assume for this illustration that the size of the land plots is so great that the distance between dwellings is greater than the voice can carry and that most of the communication is between nearest neighbors only, as shown in Figure 2.