Bookmarks
Concepts
Activity
Courses
Learning Plans
Courses
Request
Log In
Sign up
👤
Log In
Join
?
⚙️
→
👤
Log In
Join
?
←
Menu
Bookmarks
Concepts
Activity
Courses
Learning Plans
Courses
Request
Log In
Sign up
×
CUSTOMIZE YOUR LEARNING
→
TIME COMMITMENT
YOUR LEVEL
LET'S Start Learning
👤
Log In
Join
?
⚙️
→
👤
Log In
Join
?
←
Menu
Bookmarks
Concepts
Activity
Courses
Learning Plans
Courses
Request
Log In
Sign up
×
CUSTOMIZE YOUR LEARNING
→
TIME COMMITMENT
YOUR LEVEL
LET'S Start Learning
New Course
Concept
Accelerated Expansion
Accelerated expansion
refers to the observation that the universe is not only expanding but doing so at an increasing rate, a discovery that has profound
implications for cosmology
and our
understanding of the universe's fate
. This phenomenon is primarily attributed to
dark energy
, a
mysterious form of energy
that permeates all of space and counteracts the
force of gravity on cosmic scales
.
Relevant Degrees
Stars and Stellar Systems 88%
Gravity and Pendulums 13%
Generate Assignment Link
Lessons
Concepts
Suggested Topics
Foundational Courses
Learning Plan
All
Followed
Recommended
Assigned
Concept
Phrase Structure Rules
Phrase structure rules
are a
formal grammar system
used to describe the
syntax of languages
by breaking down sentences into their
constituent parts
hierarchically. They provide a framework for generating the
permissible structures
of a language and are fundamental to
understanding syntax
in
generative grammar models
.
Concept
Syntactic Categories
Syntactic categories
, also known as
parts of speech
, are a fundamental aspect of
linguistic theory
, classifying words based on their function and
syntactic behavior
in sentences. These categories help in understanding and analyzing
sentence structure
, aiding in the parsing and
generation of natural language
by both humans and
computational systems
.
Concept
Tree Diagrams
Tree diagrams
are
graphical representations
used to illustrate all
possible outcomes
or combinations in a structured,
branching format
, making them useful for probability and
decision-making analysis
. They help in
visualizing complex problems
by breaking them down into simpler, more
manageable parts
, allowing for
easier calculation
and understanding of probabilities and choices.
Concept
Constituent Analysis
Concept
Immediate Constituent Analysis
Concept
X-bar Theory
X-bar Theory
is a component of
generative grammar
that aims to identify a
universal structure
underlying all phrases in
natural languages
by using a
hierarchical model
. It posits that phrases are built around a head, with
optional specifiers
and complements, forming a
recursive structure
that can be represented as X', where X stands for any
lexical category
.
Concept
Deep Structure And Surface Structure
Concept
Generative Grammar
Generative Grammar
is a
theory of grammar
that aims to describe the
implicit knowledge
humans have about the
structure and
formation of sentences
in their
native language
. It posits that a
finite set of rules
can generate an
infinite number of sentences
, capturing the
creativity of language use
while adhering to its
syntactic constraints
.
Concept
Syntactic Ambiguity
Syntactic ambiguity
occurs when a sentence can be interpreted in
multiple ways
due to its structure, rather than the meanings of the individual words. This type of ambiguity can lead to
misunderstandings in communication
and is a significant
area of study
in linguistics and
natural language processing
.
Concept
Lexical Functional Grammar
Lexical Functional Grammar
is a way to understand
how words fit together
to
make sentences
. It looks at both
the words
and
the rules
that help us know
what they mean
when they are
in a sentence
.
Concept
Treebank
A treebank is a
parsed text corpus
that annotates syntactic or
semantic sentence structure
, providing a valuable resource for
natural language processing tasks
. It serves as a
foundational dataset
for training and evaluating
computational models
in linguistics and
artificial intelligence
, enhancing
machine understanding
of
human languages
.
3