RESEARCH BASE
Search 3,721 documents across 34 fields — every claim tier-rated by evidence
3,633 are the core, quality-scored corpus (34 lettered sections — see How We Work); the remaining 88 are cross-corpus synthesis documents (68 InterDocs, 12 Connections, 8 Theories) also indexed here.
280 results for "frequency analysis" — page 6 of 14
G_4_14 — Replication Crisis and What It Means for Ancient Claims
The replication crisis refers to the discovery, beginning in the early 2010s, that a substantial proportion of findings published in peer-reviewed scientific journals — particularly in psychology, social science, and bio
G_1_16 — Ground-Penetrating Radar in Archaeological Prospection
Ground-Penetrating Radar (GPR) is a non-invasive geophysical survey technique that transmits short pulses of electromagnetic (radar) energy into the ground and records the reflections returned from subsurface interfaces
G_1_08 — Machine Learning in Archaeology — Pattern Recognition in the Past
Machine learning (ML) — the subset of artificial intelligence in which algorithms learn patterns from data rather than being explicitly programmed — is transforming archaeological practice across every stage of research:
G_3_15 — Piezoelectric Effects: Crystals, Geology, and Ancient Technology
Piezoelectricity (from Greek piezein, "to squeeze") is the physical phenomenon whereby certain crystalline materials generate an electric charge when subjected to mechanical stress, and conversely, deform mechanically wh
G_3_07 — Cymatics — Visible Sound and the Physics of Vibration
Cymatics — from the Greek κῦμα (kyma, "wave") — is the study of visible sound patterns formed when a vibrating surface (plate, membrane, or fluid) organizes matter (sand, powder, liquid) into geometric configurations at
G_3_26 — Resonance as Universal Information Encoding
Resonance — the selective amplification of energy at characteristic frequencies — appears across physical, biological, and cognitive systems as a substrate-independent information-encoding mechanism. From radio receivers
G_2_10 — Zooarchaeology — Animal Bones as Cultural Evidence
Zooarchaeology (also called archaeozoology) is the study of animal remains — primarily bones, teeth, antler, horn, and shell — recovered from archaeological sites, to reconstruct past human-animal relationships, includin
G_2_14 — Information Theory Applied to Ancient Scripts and Codes
Information theory — founded by Claude Shannon (1948) — provides a mathematical framework for quantifying the information content, redundancy, and statistical structure of communication systems. When applied to ancient s
O_1_20 — Schumann Resonance
The Schumann resonances are a set of spectral peaks in the extremely low frequency (ELF) portion of the Earth's electromagnetic field spectrum, generated by lightning discharges exciting the resonant cavity formed betwee
O_2_14 — Slow Earthquakes and Episodic Tremor: Silent Seismic Events
Slow earthquakes — a class of seismic events in which fault slip occurs over days to months rather than the seconds to minutes characteristic of conventional earthquakes — represent one of the most significant discoverie
O_4_09 — Singing Sands, Booming Dunes, and Anomalous Desert Acoustics
Singing sands and booming dunes are natural acoustic phenomena in which sand produces audible sound — sometimes at extraordinary volume (up to 105 dB, comparable to a chainsaw at 1 m) — when disturbed by wind, avalanchin
T_4_02 — Forensic Psychology and the Criminal Mind
Forensic psychology applies psychological science to legal and criminal justice systems — encompassing criminal behavior, courtroom processes, investigative methods, risk assessment, and rehabilitation.
T_2_20 — Personality Disorders: Cluster Analysis and Dimensional Models
Personality disorders (PDs) — enduring patterns of inner experience and behavior that deviate markedly from cultural expectations, are pervasive and inflexible, and cause significant functional impairment — affect approx
T_2_05 — Clinical Psychology: History and Foundations
Clinical psychology — the assessment, diagnosis, and treatment of mental disorders — evolved from ancient supernatural explanations of madness through institutional reform, the psychoanalytic revolution, behavioral and c
T_1_10 — Psychometrics and Intelligence Testing
Intelligence testing is among the oldest and most psychometrically robust enterprises in psychology. Spearman's g factor (1904) — a general mental ability extracted through factor analysis — remains one of the strongest
T_1_11 — History of Psychology
Psychology's formal history as an independent discipline spans approximately 150 years — from Wilhelm Wundt's founding of the first experimental psychology laboratory in Leipzig (1879) to the present day. The discipline
T_5_05 — Parapsychology and Anomalous Cognition
Parapsychology is the scientific study of claimed anomalous psychological phenomena — particularly extrasensory perception (ESP) (telepathy, clairvoyance, precognition) and psychokinesis (PK) (mental influence on physica
D_5_13 — Obsidian: Volcanic Glass in Technology, Trade, and Ritual
Obsidian — a naturally occurring volcanic glass formed when felsic lava cools rapidly with insufficient crystal growth — is one of the most important materials in human technological and cultural history. Prized for its
ZD_3_05 — Compiler Theory and Parsing
Compiler theory — the science of translating high-level programming languages into machine-executable code — is one of the most mathematically rigorous and practically impactful subfields of computer science. Compilers b
ZD_5_08 — Computer Music: Algorithmic Composition, Digital Audio, and AI Music
Computer music encompasses the creation, analysis, processing, and performance of music using computers — spanning algorithmic composition (generating music through formal procedures and code), digital audio signal proce
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