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Coherer: History & Applications
The coherer was a primitive form of radio signal detector used in the first radio receivers during the wireless telegraphy era at the beginning of the 20th century. Its use in radio was based on the 1890 findings of French physicist Édouard Branly and adapted by other physicists and inventors over the next ten years. The device consists of a tube or…
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Coherer topic overview
The analysis highlights History and Applications as prominent areas in the source structure around Coherer. 1 topic appears in more than one source area, which can help identify connections that are less obvious in a linear reading.
Related topics
76
Source areas
6
Connected nodes
83
Extracted relationships
79
Concept neighborhoods
23
Bridge connections
83
What this topic covers Research coverage
Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.
History · 21 topics
Limitations of coherers · 14 topics
Operation · 14 topics
Application · 11 topics
Overview · 10 topics
Imperfect junction coherer · 7 topics
Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.
Key facts & relationships
High-confidence facts extracted from structured source data. Use them as anchors for further research.
Explore all related topics Closing gaps
A structured outline of related entities, concepts and subtopics. Open any item to build a new map centered on it.
Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
How Coherer connects Entity context
Entity context groups extracted connections by relationship type. Counts show recurrence in the analyzed source; the examples are research signals, not claims about importance.
The extracted context around Coherer shows recurring relationship patterns in the source. For example, Coherer → Coherers, Cuff, Early Radio Wave Detectors, Electrical Engineers, Inst, ISBN, Lock-gray-alt-2, Lock-green, Lock-red-alt-2, London, Master's Thesis, Metal-Oxide-Metal, MOM, PA, Philadelphia, Phillips, RF, Scanning Tunneling Microscope, STM, Temple University Another extracted example is Coherer → Adolphus, April, Hirakawa Institute, Japan, Marconi Calling Company, Pages, Receiver, Recent, ShareAPic, Slaby, Technology, Tesla's US Patent, The Century Magazine, The Coherer, The New Telegraphy, Virtual, Web, Wireless, World. Use these groups to spot repeated connection types before inspecting the individual relationships.
Coherer
Top relations
related to Further reading· 24
Coherer → Coherers, Cuff, Early Radio Wave Detectors, Electrical Engineers, Inst, ISBN, Lock-gray-alt-2, Lock-green, Lock-red-alt-2, London, Master's Thesis, Metal-Oxide-Metal, MOM, PA, Philadelphia, Phillips, RF, Scanning Tunneling Microscope, STM, Temple University
related to External links· 19
Coherer → Adolphus, April, Hirakawa Institute, Japan, Marconi Calling Company, Pages, Receiver, Recent, ShareAPic, Slaby, Technology, Tesla's US Patent, The Century Magazine, The Coherer, The New Telegraphy, Virtual, Web, Wireless, World
related to Imperfect junction coherer· 14
Coherer → An, Bose, By, Detector, He, In, Its, Jagdish Chandra Bose, London, Marconi, Royal Society, The, There, This
Relationships are represented as Subject → Predicate → Object triples. Confidence describes extraction strength, not the real-world importance of a relationship; lower-confidence rows may be contextual rather than explicit.
TTTA extracted 79 structured relationships around Coherer. Examples in this analysis include Fleming's oscillation valve → instance of → 1918 by vacuum tube technologies and Coherer → related to Application → The. The table shows each extracted connection, where it came from and its confidence.
Subject
Predicate
Object
Confidence
Src
Fleming's oscillation valve
instance of
1918 by vacuum tube technologies
0.80
text
Lee De Forest's Audion
instance of
1918 by vacuum tube technologies
0.80
text
Coherer
related to Application
The
0.60
section
Coherer
related to Application
Silver
0.60
section
Coherer
related to Application
In
0.60
section
Coherer
related to Application
One
0.60
section
Coherer
related to Application
B1
0.60
section
Coherer
related to Application
RF
0.60
section
Coherer
related to External links
Web
0.60
section
Coherer
related to External links
The Coherer
0.60
section
Coherer
related to External links
World
0.60
section
Coherer
related to External links
Wireless
0.60
section
No triples extracted yet.
Related concept clusters Concept neighborhoods
Concept neighborhoods group terms that sit near one another in the extracted graph. They are useful for discovering adjacent language and context, but proximity does not by itself imply a factual relationship.
The concept neighborhoods around Coherer bring nearby vocabulary together. In this analysis, examples include Radio, Filings and Signal. Use the clusters to find adjacent concepts and terminology that may deserve separate research.
Coherer
Radio
Filings
Signal
Operation
Current
Used
Detector
Electromagnet
Wireless
Electrical
Resistance
Tube
coherer
Radio
Filings
Signal
Operation
Current
Used
Detector
Electromagnet
Wireless
Electrical
Resistance
Tube
radio receivers
Signal
Frequency
Waves
Detector
Telegraphy
Wireless
Hertzian
Current
Particles
Based
Physicist
Device
metal filings
Tube
Filings
Metal
Particles
Resistance
Two
Cling
Used
Would
Together
Could
Frequency
radio frequency
Signal
Particles
Cling
Together
Frequency
Radio
Waves
Detector
Telegraphy
Wireless
Hertzian
Current
radio waves
Signal
Wireless
Frequency
Waves
Detector
Telegraphy
Hertzian
Current
Particles
Based
Physicist
Device
radio transmitters
Signal
Frequency
Waves
Detector
Telegraphy
Wireless
Hertzian
Current
Particles
Based
Physicist
Device
imperfect junction coherer
Radio
Filings
Signal
Operation
Current
Used
Detector
Electromagnet
Wireless
Electrical
Resistance
Tube
Connections between topic areas Semantic bridges
Semantic bridges connect parts of the graph that would otherwise be more separate. A bridge is a structural signal in this analysis, not a claim that the two topic areas are equivalent.
For Coherer, one of the stronger structural bridges in this analysis connects Coherer with History. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.
Number of nodes, edges, triples, density and central hubs. Use it to gauge the size and connectivity of the map.
Coherer
Nodes84
Edges83
Triples79
Avg. degree1.98
Density0.02381
Components1
Source & methodology
TTTA analyzes the structure around Coherer to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History & Applications, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.
