Although something like code books is implied by the model, they are nowhere represented in the model, which creates many conceptual difficulties.

In practice usually a given DBMS uses the same data model for both the external and the conceptual levels ( e. g., relational model ).

First, the conceptual level is designed, which defines the over-all picture / view of the database, and reflects all the real-world elements ( entities ) the database intends to model, as well as the relationships among them.

A common way to carry out conceptual level design is to use the entity-relationship model ( ERM ) ( both the basic one, and with possible enhancement that it has gone over ), since it provides a straightforward, intuitive perception of an application's elements and semantics.

The term provides the conceptual framework used to demonstrate that different laboratories do not share the same " scientific " knowledge production model, but rather each is endowed with a different epistemic culture prescribing what is adequate knowledge and how it is obtained.

* System model ( disambiguation ), any of several conceptual models that describes and represents a system

Since Fisher's initial conceptual model of the ' runaway ' process, Russell Lande and Peter O ' Donald have provided detailed mathematical proofs that define the circumstances under which runaway sexual selection can take place.

* Von Neumann architecture, a conceptual model of a computer architecture

The protocol suite is designed as three conceptual layers, which correspond closely to the lower three layers of the seven-layer OSI model.

* Domain model, a conceptual model of a system that describes the various entities involved and their relationships

When Waddington coined the term the physical nature of genes and their role in heredity was not known ; he used it as a conceptual model of how genes might interact with their surroundings to produce a phenotype.

From the conceptual framework of the cultural model come implicit questions, such as: How is deafness influenced by the physical and social environment in which it is embedded ; What are the interdependent values, mores, art forms, traditions, organizations, and language that characterize this culture?

The RDF data model is similar to classic conceptual modeling approaches such as entity-relationship or class diagrams, as it is based upon the idea of making statements about resources ( in particular Web resources ) in the form of subject-predicate-object expressions.

Borrowing from concepts available in logic ( and as illustrated in graphical notations such as conceptual graphs and topic maps ), some RDF model implementations acknowledge that it is sometimes useful to group statements according to different criteria, called situations, contexts, or scopes, as discussed in articles by RDF specification co-editor Graham Klyne.

A conceptual schema or conceptual data model is a map of concepts and their relationships used for databases.

A data structure diagram ( DSD ) is a data model or diagram used to describe conceptual data models by providing graphical notations which document entities and their relationships, and the constraints that binds them.

Lakoff's reliance on empirical scientific evidence, i. e. specifically falsifiable predictions, in the 1987 work and in Philosophy in the Flesh ( 1999 ) suggests that the cognitive-metaphor position has no objections to the scientific method, but instead considers the scientific method a finely developed reasoning system used to discover phenomena which are subsequently understood in terms of new conceptual metaphors ( such as the metaphor of fluid motion for conducted electricity, which is described in terms of " current " " flowing " against " impedance ," or the gravitational metaphor for static-electric phenomena, or the " planetary orbit " model of the atomic nucleus and electrons, as used by Niels Bohr ).

Doug Fesler and Jill Fredston developed a conceptual model of the three primary elements of avalanches: terrain, weather, and snowpack.

This shows that a data model can be an external model ( or view ), a conceptual model, or a physical model.

He argues that one of the fundamental conceptual mistakes of cultural imperialism is to take for granted that the distribution of cultural goods can be considered as cultural dominance.

In recent years many scholars have investigated the original ways in which writers use novel metaphors and question the fundamental frameworks of thinking implicit in conceptual metaphors.

From a sociological, cultural or philosophical perspective, the question becomes, to what extent ideologies maintain and impose conceptual patterns of thought by introducing, supporting, and adapting fundamental patterns of thinking metaphorically.

These fundamental questions involved a conceptual distinction between the concepts of " state " and " government.

Whorf's most elaborate argument for the existence of linguistic relativity regarded what he believed to be a fundamental difference in the understanding of time as a conceptual category among the Hopi.

Generally, the foundations of a field of study, refers to a more-or-less systematic analysis of its most basic or fundamental concepts, its conceptual unity and its natural ordering or hierarchy of concepts, which may help to connect it with the rest of human knowledge.

They are part of the FASB's conceptual framework project and set forth fundamental objectives and concepts that the FASB use in developing future standards.

Warren County citizens argued that the toxic waste landfill regulations were based on the fundamental assumption that the EPA's conceptual dry-tomb landfill would contain the toxic waste.

Ross argued in a popular paper that the fundamental attribution error forms the conceptual bedrock for the field of social psychology.

The fundamental core subjects for structural engineering are strength of materials or solid mechanics, Structural Analysis-Static & Dynamic, material science, numerical analysis and conceptual structural design.

This new conceptual orientation led, among other things, to fundamental changes both in the force and integrated command structure.

The zombie argument is difficult to assess because it brings to light fundamental disagreements about the method and scope of philosophy itself and the nature and abilities of conceptual analysis.

Eliot pioneered many of the fundamental principles of regional planning and laid the conceptual and political groundwork for land and historical conservancies across the world.

One of the fundamental conceptual problems of the world system theory is that the assumptions which define its actual conceptual units are social systems.

In the narrower sense, pilpul refers to a method of conceptual extrapolation from texts in efforts to reconcile various texts or to explain fundamental differences of approach between various earlier authorities, which became popular in the late fifteenth and early sixteenth centuries: its founders are generally considered to be Jacob Pollak and Shalom Shachna.

Though completely equivalent in conceptual content to temperature, β is generally considered a more fundamental quantity than temperature owing to the phenomenon of negative temperature, in which β is continuous as it crosses zero where T has a singularity.

It is the natural or fundamental state of our mind, totally free from all conceptual elaborations.

Kin selection refers to changes in gene frequency across generations that are driven at least in part by interactions between related individuals, and this dynamic forms much of the conceptual basis of the theory of social evolution.

To this end, he set two months aside for the creation of hundreds of conceptual drawings detailing various possible interactions between the parts, and a further four months for practical testing and development.

A thinker with a method has already decided how to proceed, is unable to give him or herself up to the matter of thought in hand, is a functionary of the criteria which structure his or her conceptual gestures.

The validity of sense perception, therefore, is not susceptible to proof ( because it is presupposed by all proof as proof is only a matter of adducing sensory evidence ) nor should its validity be denied ( since the conceptual tools one would have to use to do this are derived from sensory data ).

A primary tenet of this theory is that metaphors are matter of thought and not merely of language: hence, the term conceptual metaphor.

In any case, the argument from first-generation to second-generation rights was never supposed to be a matter of conceptual analysis.

He is cited by Michio Kaku in " Visions: How Science Will Revolutionize The 21st Century " and in " Physics of the Impossible " regarding the subjective experience that arises from matter or the impossibility of building machines that can think: " is like slugs trying to do Freudian psychoanalysis, they just don't have the conceptual equipment.

Peter announces that he will talk about the nature of conceptual reality, then informs the others that " it doesn't matter if we're in the box ".

The acentric factor is a conceptual number introduced by Pitzer in 1955, proven to be very useful in the description of matter.