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The end node problem arises when individual computers are used for sensitive work and/or temporarily become part of a trusted, well-managed network/cloud
End_node_problem
Device or point within a network capable of creating, receiving, or transmitting data
called the end node problem. There are several means to remedy this problem but all require instilling trust in the end node computer. End system Middlebox
Node_(computer_networking)
Problem in wireless networking
In wireless networking, the hidden node problem or hidden terminal problem occurs when a node can communicate with a wireless access point (AP), but cannot
Hidden_node_problem
JavaScript runtime environment
Node.js is a cross-platform, open-source JavaScript runtime environment that can run on Windows, Linux, Unix, macOS, and more. Node.js runs on the V8
Node.js
could provide another factor of authentication. A Secure End Node solves/mitigates end node problem. The common, but expensive, technique to deploy SENs is
Secure_end_node
Classic problem in graph theory
historical Königsberg has four nodes of odd degree, it cannot have an Eulerian path. An alternative form of the problem asks for a path that traverses
Seven_Bridges_of_Königsberg
Algorithm used for pathfinding and graph traversal
optimality, and optimal efficiency. Given a weighted graph, a source node and a goal node, the algorithm finds the shortest path (with respect to the given
A*_search_algorithm
Data structure with nodes pointing to the next node
previous node and insert a node after it. function insertAfter(Node node, Node newNode) // insert newNode after node newNode.next := node.next node.next :=
Linked_list
Fault in a computer system that presents different symptoms to different observers
simplest end of the spectrum. Whereas the fail-stop failure mode simply means that the only way to fail is a node crash, detected by other nodes, Byzantine
Byzantine_fault
Technological policy
these and adopt a BYOD policy. BYOD security relates strongly to the end node problem, whereby a device is used to access both sensitive and risky networks
Bring_your_own_device
Computer science problem
string spelled by the edges from the root to such a node is a longest repeated substring. The problem of finding the longest substring with at least k {\displaystyle
Longest repeated substring problem
Longest_repeated_substring_problem
Thought experiment
the problem. A non-deterministic protocol with a potentially variable message count can be compared to an edge-labeled finite tree, where each node in
Two_Generals'_Problem
is usually defined by providing a tree whose nodes are the variables of the new problem; for each node, also provided are the associated set of original
Decomposition method (constraint satisfaction)
Decomposition_method_(constraint_satisfaction)
Computational problem in graph theory
sink nodes. For the source and destination of every flight i, one adds two nodes to V, node si as the source and node di as the destination node of flight
Maximum_flow_problem
Combinatorial optimization problem
assignment problem is a fundamental combinatorial optimization problem. In its most general form, the problem is as follows: The problem instance has
Assignment_problem
NP-hard problem in combinatorial optimization
processing nodes; routes vary by time to transfer the data, but nodes also differ by their computing power and storage, compounding the problem of where
Travelling_salesman_problem
String-searching algorithm
then there will be nodes for (bca), (bc), (b), and (). If a node is in the dictionary then it is a blue node. Otherwise it is a grey node. There is a black
Aho–Corasick_algorithm
Heuristic pathfinding algorithm
is the cost to travel from the root to node n {\displaystyle n} and h ( n ) {\displaystyle h(n)} is a problem-specific heuristic estimate of the cost
Iterative_deepening_A*
Least-weight tree connecting graph vertices
where each node is considered a computer and no node knows anything except its own connected links. The mathematical definition of the problem is the same
Minimum_spanning_tree
Distributed data processing framework
Name Node is a master node and Data node is its corresponding Slave node and can talk with each other. Name Node: HDFS consists of only one Name Node that
Apache_Hadoop
Method in electric circuit analysis
analysis (also referred to as node-voltage analysis or the branch current method) is a method of determining the voltage between nodes (points where elements
Nodal_analysis
Algorithm
import Node node1: Node = Node("node1", 100) node2: Node = Node("node2", 200) node3: Node = Node("node3", 300) print(str(wrh.determine_responsible_node([node1
Rendezvous_hashing
transportation may or must go through intermediate nodes, possibly changing modes of transport. The Transshipment problem has its origins in medieval times[dubious
Transshipment_problem
Data structure for storing non-overlapping sets
forest then x.parent := x x.size := 1 // if nodes store size x.rank := 0 // if nodes store rank end if end function This operation has linear time complexity
Disjoint-set_data_structure
Clustering and community detection algorithm
"bridge" node (represented with an extra circle) is a member of the community represented by blue nodes. Now consider the result of a node-moving step
Leiden_algorithm
Technique to compress data
probability equal to the sum of the two nodes' probabilities. Add the new node to the queue. The remaining node is the root node and the tree is complete. Since
Huffman_coding
Class of algorithms
(node, stack) node ← bst.root stack ← empty stack while node ≠ null stack.push(node) if key = node.key return (node, stack) if key < node.key node ←
Tree_traversal
given memory node := queue.begin(); // min-f-cost-node if problem.is-goal(node) then return success; s := next-successor(node) if !problem.is-goal(s) &&
SMA*
Computer science concept
the problem: for a singly linked lock-free list, a node can be inserted by a producer thread A after the head node, the next pointer of the head node gets
Persistent_memory
Software design structured around a node graph
present in the node graph, the evaluation never ends as nodes are continually executed by following links. To avoid these problems many node graphs architectures
Node_graph_architecture
Tree-based computer data structure
greater than a2. Internal nodes Internal nodes (also known as inner nodes) are all nodes except for leaf nodes and the root node. They are usually represented
B-tree
Logic problem
cannibals problem, and the closely related jealous husbands problem, are classic river-crossing logic puzzles. The missionaries and cannibals problem is a
Missionaries and cannibals problem
Missionaries_and_cannibals_problem
Decision support tool
of three types of nodes: Decision nodes – typically represented by squares Chance nodes – typically represented by circles End nodes – typically represented
Decision_tree
Data structure
number of children per node. A B+ tree consists of a root, internal nodes, and leaves. The root may be either a leaf or a node with two or more children
B+_tree
about the identity of the worst-packing convex solid The Tammes problem for numbers of nodes greater than 14 (except 24). For which dimensions of sphere differential
List of unsolved problems in mathematics
List_of_unsolved_problems_in_mathematics
weights. The goal of the problem is to find a tree, among all of the possible trees with n {\displaystyle n} internal nodes, that minimizes the weighted
Garsia–Wachs_algorithm
Mathematical problem involving optimal stopping theory
known as the marriage problem, the sultan's dowry problem, the fussy suitor problem, the googol game, and the best choice problem. Its solution is also
Secretary_problem
Clustering and community detection algorithm
{\Sigma _{tot}}{2m}}\right)^{2}\end{aligned}}} where Σ i n {\displaystyle \Sigma _{in}} is the sum of edge weights between nodes within the community c (each
Louvain_method
Node ordering for directed acyclic graphs
visit() that ended before the call to visit n, or by a call to visit() that started even before the call to visit n. Since each edge and node is visited
Topological_sorting
Optimization problem
The vehicle routing problem (VRP) is a combinatorial optimization and integer programming problem which asks "What is the optimal set of routes for a
Vehicle_routing_problem
Class of artificial neural networks
their nodes, GNN architectures are commonly designed to be permutation equivariant: reordering the nodes in the input reorders the corresponding node representations
Graph_neural_network
Procedure to prevent network routing loops
reverse node N tells a white-lie. In this example, network node A routes packets to node B in order to reach node C. The links between the nodes are distinct
Split horizon route advertisement
Split_horizon_route_advertisement
Kind of binary decision diagram
suitable for certain combinatorial problems. Recall the Ordered Binary Decision Diagram (OBDD) reduction strategy, i.e. a node is replaced with one of its children
Zero-suppressed decision diagram
Zero-suppressed_decision_diagram
Experimental acoustical apparatus
end of the tube, next to the speaker's diaphragm, is vibrating, it is not exactly at a node (point of zero amplitude) of the standing wave. The node actually
Kundt's_tube
Use of functions that call themselves
computational problem where the solution depends on solutions to smaller instances of the same problem. Recursion solves such recursive problems by using functions
Recursion_(computer_science)
Computational problem of graph theory
variations of the k shortest path routing problem. In one variation, paths are allowed to visit the same node more than once, thus creating loops. In another
K_shortest_path_routing
Degree of connectedness within a graph
network analysis, indicators of centrality assign numbers or rankings to nodes within a graph corresponding to their network position. Applications include
Centrality
Plotting by a computer application
first problem by exhausting all possibilities; starting from the given node, they iterate over all potential paths until they reach the destination node. These
Pathfinding
Mapping of a graph into a tree
consider the problem of finding the maximum independent set in a graph of treewidth k. To solve this problem, first choose one of the nodes of the tree
Tree_decomposition
Problem of finding a cycle through all vertices of a graph
solution for the problem. The weak point of this approach is the required amount of energy which is exponential in the number of nodes. The problem of finding
Hamiltonian_path_problem
Network with multiple links between nodes
infrastructure nodes (i.e., bridges, switches, and other infrastructure devices) connect directly, dynamically and non-hierarchically to as many other nodes as possible
Mesh_networking
Computer science transaction algorithm
transaction participant (tree node). Three-phase commit protocol Paxos algorithm Raft algorithm Two Generals' Problem Philip A. Bernstein, Vassos Hadzilacos
Two-phase_commit_protocol
Algorithm in computer graphics to add color or texture
the node to the west of n to the end of Q. Add the node to the east of n to the end of Q. Add the node to the north of n to the end of Q. Add the node to
Flood_fill
spanning tree (MST) problem involves the construction of a minimum spanning tree by a distributed algorithm, in a network where nodes communicate by message
Distributed minimum spanning tree
Distributed_minimum_spanning_tree
2008 science fiction novel by Liu Cixin
Anime Magazine. [1] "Tencent's live-action Three-Body Problem drama debuts to rave reviews". Tech Node. January 16, 2023. Wei, Xu (February 7, 2024). "NBC
The Three-Body Problem (novel)
The_Three-Body_Problem_(novel)
Numerical analysis concept
algorithm presented in 1969 reduces the computation of the nodes and weights to an eigenvalue problem which is solved by the QR algorithm. This algorithm was
Gauss–Legendre_quadrature
Graph exploring search algorithm
the most promising node chosen according to a specified rule. Judea Pearl described best-first search as estimating the promise of node n by a "heuristic
Best-first_search
Group of medical conditions characterized by irregular heartbeat
Bradyarrhythmias are due to sinus node dysfunction or atrioventricular conduction disturbances. Arrhythmias are due to problems with the electrical conduction
Arrhythmia
Decision problem in computer science
The subset sum problem (SSP) is a decision problem in computer science. In its most general formulation, there is a multiset S {\displaystyle S} of integers
Subset_sum_problem
Concept in distributed computing
distributed among several computers (nodes). Before the task has begun, all network nodes are either unaware which node will serve as the "leader" (or coordinator)
Leader_election
When every path in a control-flow graph must go through one node to reach another
In computer science, a node d of a control-flow graph dominates a node n if every path from the entry node to n must go through d. Notationally, this
Dominator_(graph_theory)
Rooted binary tree data structure
data structure with the key of each internal node being greater than all the keys in the respective node's left subtree and less than the ones in its right
Binary_search_tree
Equivalence of optimization problems
The above minimization problem can be formulated as a minimum-cut problem by constructing a network where the source (orange node) is connected to all the
Max-flow_min-cut_theorem
Limited form of tree data structure
In computer science, a binary tree is a tree data structure in which each node has at most two children, referred to as the left child and the right child
Binary_tree
Recursive algorithm in graph theory
contains node 2 and node 3, the heaviest edge is (3,4), thus node 4 is added to set A. By following this procedure, the last two nodes are node 5 and node 1
Stoer–Wagner_algorithm
Free and open-source anonymity network based on onion routing
co-founder Nick Mathewson explained that the problem of "Tor-relay adversaries" running poisoned nodes means that a theoretical adversary of this kind
Tor_(network)
Unsolved problem in computational complexity theory
these nodes. If the node remains uncolored after trying all colors, return "unsatisfiable". Else, go to the next uncolored node. If all nodes have been
Unique_games_conjecture
Payment protocol for Bitcoin
participating nodes (independently run members of the network) and has been proposed as a solution to the bitcoin scalability problem. Joseph Poon and
Lightning_Network
Defining the orbit of an object in space
The longitude of the ascending node, also known as the right ascension of the ascending node, is one of the orbital elements used to specify the orbit
Longitude of the ascending node
Longitude_of_the_ascending_node
Wave that remains in a constant position
string will have n + 1 nodes including the fixed ends and n anti-nodes. To compare this example's nodes to the description of nodes for standing waves in
Standing_wave
Tree data structure to hold intervals
of each node is the interval itself, hence nodes are ordered first by low value and finally by high value, and the value of each node is the end point of
Interval_tree
System with multiple networked computers
gather all information in one location (D rounds), solve the problem, and inform each node about the solution (D rounds). On the other hand, if the running
Distributed_computing
Optimization by removing non-optimal solutions to subproblems
f on nodes of the search tree, as well as a problem-specific branching rule. Using a heuristic, find a solution xh to the optimization problem. Store
Branch_and_bound
Optimization algorithm
nextEval ≤ EVAL(currentNode) then // Return current node since no better neighbors exist return currentNode currentNode := nextNode algorithm Continuous
Hill_climbing
Problem in combinatorial optimization
lower bound on linear decision trees for the knapsack problem, that is, trees where decision nodes test the sign of affine functions. This was generalized
Knapsack_problem
Routing methods for networks with short node paths
between any two nodes. Determining these paths, however, can be a difficult problem from the perspective of an individual routing node in the network if
Small-world_routing
System allowing transmitters to take turns on a shared media
signal from another node before attempting to transmit. If a carrier is sensed, the node waits for the transmission in progress to end before initiating
Carrier-sense_multiple_access
Cache of previously seen positions, and associated evaluations in a game tree
has already occurred. A solution to the general problem is to store history information in each node of the transposition table, but this is inefficient
Transposition_table
Design principle for computer networking
be implemented in the communicating end nodes of the network, instead of in the network itself. Intermediary nodes (such as gateways and routers) that
End-to-end_principle
Programming paradigm focused on difficult search problems
node(X, attr(puella, n, fem, nom, sg)); node(X, attr(puella, n, fem, abl, sg)) }1 :- word(X, puella). 1{ node(X, attr(villa, n, fem, nom, sg)); node(X
Answer_set_programming
Decentralized machine learning
deep neural network) between these local nodes at some frequency to generate a global model shared by all nodes. The main difference between federated learning
Federated_learning
output node is the depth of the tree. The leaves of the tree are called output nodes. In a computation tree for a decision problem, each output node is labeled
Computation_tree
128-bit number used to identify information in computer systems
except for byte-ordering. Version 1 concatenates a 48-bit node ID with a 60-bit timestamp. The node ID is usually the MAC address of a network interface controller
Universally_unique_identifier
Concept in computer science
and eventually accepted by all other nodes. As any node in the network can attempt to solve the proof-of-work problem, a Sybil attack is infeasible in principle
Consensus_(computer_science)
Gain from observing another random variable
the nodes. Although information gain is usually a good measure for deciding the relevance of an attribute, it is not perfect. A notable problem occurs
Information gain (decision tree)
Information_gain_(decision_tree)
Manufacturing process used to create integrated circuits
the market the device is designed for. This especially became a problem at the 10 nm node. Silicon on insulator (SOI) technology has been used in AMD's
Semiconductor device fabrication
Semiconductor_device_fabrication
Data structure that always preserves the previous version of itself when it is modified
node method is to record all changes made to node fields in the nodes themselves, without erasing old values of the fields. This requires that nodes be
Persistent_data_structure
Search algorithm used in sorted arrays
searching with comparisons, this problem is reduced to calculating the minimum internal path length of all binary trees with n nodes, which is equal to: I(n)=∑k=1n⌊log2(k)⌋
Binary_search
Partition of a graph by removing fewest possible edges
min-cut theorem, 2 nodes' Minimum cut value is equal to their maxflow value. In this case, some algorithms used in maxflow problem could also be used
Minimum_cut
Computer science algorithm
current node, not absolute. For example, if the current node is vj, and vj has d neighbors, then the traversal sequence will specify the next node to visit
Graph_traversal
Process of selecting paths in a data communications network
node. When applying link-state algorithms, a graphical map of the network is the fundamental data used for each node. To produce its map, each node floods
Routing
Label to identify a network interface of a computer or other network node
used to identify and locate a network interface of a computer or a network node participating in a computer network using IPv6. IP addresses are included
IPv6_address
Sequence merge algorithm in computer science
replayGames(node, new) loser, winner := playGame(node, new) node.value := loser.value node.index := loser.index if node != root replayGames(node.parent, winner)
K-way_merge_algorithm
Variant of heap data structure
the tree is not complete, the nodes of that level are filled from left to right. Heap property: the key stored in each node is either greater than or equal
Binary_heap
Pathfinding problem
The problem of Multi-Agent Pathfinding (MAPF) is an instance of multi-agent planning and consists in the computation of collision-free paths for a group
Multi-agent_pathfinding
Academic field
social networks, considering distinct elements or actors represented by nodes (or vertices) and the connections between the elements or actors as links
Network_science
Algorithm in mathematical optimization
achieve even lower time complexities. The variant based on the highest label node selection rule has O(V 2√E) time complexity and is generally regarded as
Push–relabel maximum flow algorithm
Push–relabel_maximum_flow_algorithm
Type of algorithm, produces approximately correct solutions
goal, either by ending up in a dead end of graph G {\displaystyle G} or by skipping back and forth between two nodes v i {\displaystyle v_{i}} and v j {\displaystyle
Heuristic_(computer_science)
Concept in graph theory
structure if the nodes of the network can be easily grouped into (potentially overlapping) sets of nodes such that each set of nodes is densely connected
Community_structure
Computer Networking Program
network problems with arbitrary demands is a hard problem, which can be NP-hard and even undecidable. In a linear network coding problem, a group of nodes P
Linear_network_coding
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