The accepted ontology
Browse accepted Systema Constructum entries: human-made tools, institutions, methods, practices, works, and their definitions.
100 entries in this page
A simulacrum is a representation that has no original — a copy without a model, or a representation that has replaced and concealed the absence of an original. It is not merely a false copy but a generation of the real by a model: the simulacrum produces real…
Consonance is the state of harmonious combination where simultaneous sounds or elements blend without acoustic or perceptual clash. It exists as a qualitative judgment made by listeners — trained or untrained — that certain combinations of frequencies produce…
Pressure is the intensity of force applied per unit of area, extent, or scope. It measures how concentrated the push is — whether that push is physical (fluid molecules colliding with a surface), social (collective expectation on an individual), or psychologi…
Tension is the state of strain produced by opposing forces, influences, or demands. It exists across domains — material, musical, psychological, social — wherever two or more tendencies pull against each other, creating a condition that seeks relief. Tension…
A beat is a regularly recurring pulse of emphasis in time, the temporal unit that organizes rhythmic experience in music, poetry, and movement. It is the measured interval between successive accents that structures temporal perception into patterned units — t…
Symmetry is a human-made concept designating invariance under transformation — the property that a configuration, object, system, or relationship retains specified attributes when a transformation is applied. Its parameters: (1) a domain (geometric, algebraic…
A wave is a human-made concept designating the mathematical model of a propagating disturbance that transfers energy through a medium or vacuum without net transport of matter. Its parameters: (1) a disturbance from equilibrium state, (2) propagation at finit…
An echo is a human-made concept designating the category of reflected sound waves that return to a listener with sufficient delay to be perceived as distinct from the original. Its parameters: (1) a sound wave reflected from a surface or boundary, (2) a propa…
An oscillation is a human-made concept designating the category of phenomena in which a quantity varies periodically around a central equilibrium value. Its parameters: (1) a measurable state that returns repeatedly to a reference point, (2) a characteristic…
A fastener is a human-made concept designating the category of mechanical devices engineered to join or secure two or more objects together. Its parameters: (1) a physical component or system that creates a non-permanent or semi-permanent connection, (2) a sp…
Memento mori is a human-made concept designating the deliberate practice of contemplating one's own mortality. Its parameters: (1) an intentional act of reflection on the finitude of life, (2) performed not for despair but for clarification of values and prio…
A parable is a brief, concrete narrative constructed to convey an abstract moral or spiritual lesson through analogy. Its parameters: (1) a simplified story with identifiable characters and a clear situation, (2) a mapping between narrative elements and the i…
A human-made concept describing the state of strain produced when incompatible or mutually inconsistent elements co-occur — whether acoustic frequencies that resist harmonic combination, beliefs that contradict one another, or any system containing elements t…
A human-made concept for a character virtue in which a person maintains a modest assessment of their own importance, abilities, and fallibility — not self-erasure, but the disciplined correction of self-inflation. It operates as a social regulator (modesty no…
Vocalization is a human-made concept designating the category of sounds produced by modulating air through the larynx and articulatory organs — a map for classifying what the body produces when breath is shaped by structured anatomy. Its parameters: (1) an ai…
Resonance is the concept by which humans categorize the phenomenon of amplified response when a driving frequency matches or approaches a system's natural frequency. Its parameters: (1) a driven system with natural frequencies (normal modes), (2) a periodic d…
A kiln is a thermally insulated chamber designed to reach and maintain elevated temperatures for the purpose of firing ceramics, sintering powders, or calcining materials. Its parameters are: (1) a combustion chamber or heating element that generates controll…
A humming is a vocal technique in which a person produces a steady tonal sound by vibrating the vocal folds while the lips remain closed and the mouth cavity forms a resonating chamber. The technique requires breath control, pitch awareness, and the ability t…
A clamp is a holding device composed of two parallel jaws and a force-generating mechanism that draws them together to secure objects in place. The mechanism varies by type — a screw clamp uses threaded rotation, a spring clamp uses elastic tension, a toggle…
An anvil is a heavy metal block — typically of cast iron, forged steel, or steel-on-iron composite — with a flat working face, a horn for shaping curves, and a bick for finer work. It provides a rigid, resilient surface that absorbs hammer blows while reflect…
A soundboard (also called a top or belly) is a flat, resonant wooden panel built into the body of acoustic stringed instruments — guitars, violins, cellos, and similar lutes — that receives mechanical vibrations from the strings via a bridge and amplifies the…
A gazetteer is a systematically compiled reference work that catalogs geographical place names alongside structured descriptive information. Its parameters are: (1) a compiled list of named places drawn from survey, record, or field observation, (2) for each…
An envelope is a foldable enclosure made of thin sheet material (paper, parchment, or synthetic polymer) whose parameters are: (1) a single sheet folded and sealed along edges to form a pocket, (2) a closure mechanism (glued flap, self-seal adhesive, or tie)…
A promise is a speech act by which a speaker undertakes an obligation to bring about a future action or state of affairs. Its parameters are: (1) a speaker who declares commitment, (2) a hearer to whom the commitment is directed, (3) a specific content descri…
A bell is a hollow resonator — typically a cast-metal cup or chamber — designed to produce a sustained, characteristic tone when its exterior is struck. Its parameters are: (1) a resonant body (metal, ceramic, wood, or other rigid material) shaped to amplify…
Mediation is a structured dispute resolution process in which a neutral third party — the mediator — facilitates communication and negotiation between disputing parties without imposing a binding decision. Its parameters are: (1) voluntary participation by al…
A codpiece is a separate garment piece attached to the front of breeches or trunk hose that covers and accentuates the male genital area. Its parameters are: (1) a distinct panel of fabric or leather, (2) attached to lower-body garments at the crotch seam, (3…
A digression is a rhetorical device in which a speaker or writer temporarily departs from the main subject of discourse to explore a related but non-essential idea, then returns to the original topic. Its parameters are: (1) a main topic or argument being pur…
A heuristic-method is a human-created problem-solving technique that substitutes practical shortcuts, rules of thumb, or experience-based approximations for exhaustive algorithmic procedures. Its parameters are: (1) a goal state that need not be globally opti…
A tangent is a straight line that touches a curve at exactly one point while sharing the curve's instantaneous slope at that point. Its parameters are: (1) a base curve defined by a differentiable function, (2) a point of tangency on the curve, (3) the deriva…
A whistle is a human-made acoustic device that produces a clear, sustained tone when air is forced through an opening. It consists of a chamber or tube with a mouthpiece, a windway that directs airflow against a sharp edge (the fipple), and an escape hole tha…
Attunement is the act or process of adjusting oneself—or an object one controls—to align with a target standard, frequency, rhythm, or disposition. Its parameters are: (1) a target to align with (a pitch, a person's mood, a cultural norm, a mechanical baselin…
A chant is a vocal practice in which speech-like text is repeated at a steady, often musical, pitch — situated between ordinary speech and full singing. Its parameters are: (1) a textual body that is typically rhythmic and formulaic (mantra, prayer, work-cry,…
A lullaby is a song sung or played to soothe a child into sleep. Its parameters are: (1) a simple melodic contour with narrow pitch range and repetitive phrasing; (2) a tempo matching or slowing toward resting heart rate; (3) an address directed at or near a…
A spring is a mechanical element designed to deform under applied force and recover its original shape when the force is removed, thereby storing and releasing mechanical energy. It is manufactured from elastic materials (most commonly steel alloys, but also…
An actuator is an engineered component that converts one form of energy into controlled mechanical motion. Parameters: energy source (electrical current, compressed gas, hydraulic pressure, or thermal expansion), motion output (linear stroke, rotary rotation,…
A machine element is a mechanical component manufactured to perform a specific, well-defined function within a larger machine or mechanism. Standard types include: gears (torque transmission), cams (motion conversion), bearings (friction reduction), shafts (p…
A rack is a linear gear: a straight bar with uniformly spaced, precision-cut teeth along one edge, designed to mesh with a circular gear (pinion) to convert rotational motion into linear motion, or vice versa. Parameters: (1) tooth profile — the shape of indi…
A device that transmits and modifies force, motion, or energy to perform a specific task. Parameters: energy input (power source and form), mechanical advantage (force/motion amplification ratio), component count and topology (how parts link to transmit force…
A wheel-and-axle is a mechanical simple machine consisting of two rigidly connected circular elements of different diameters sharing a common axis. When rotational force is applied to the larger element, the smaller element produces amplified torque, and vice…
A cam is a mechanical element: a rotating or sliding piece with a specifically shaped profile (the cam contour) that converts continuous rotational motion into a prescribed reciprocating or oscillating motion in a mating follower. Its operation is governed by…
A screw is a mechanical element: a tapered cylinder with a helical ridge (thread) wound around its shaft, designed to convert rotational motion into linear force or to fasten objects by penetrating and gripping material. It consists of a head, shank, and thre…
A gear is a mechanical component: a rotating circular element with precision-cut teeth around its circumference, designed to mesh with another gear or rack to transmit torque and control rotational speed or direction. Its parameters are: (1) tooth geometry (i…
A washboard is a human-made laundry tool: a flat surface with corrugated or ribbed texture (traditionally wooden with ridges, later corrugated metal) designed to increase friction when fabric is rubbed against it, amplifying the mechanical action of hand-wash…
Torque is the physical concept quantifying the rotational force applied to an object about an axis or pivot point. It is defined as the cross product of the position vector (from the axis to the point of force application) and the force vector, yielding a mea…
An inclined plane is a flat sloping surface that reduces the force required to raise a load by trading force for distance. Parameters: (1) flat rigid surface, (2) angled relative to horizontal, (3) converts a large vertical force applied over a short distance…
A wedge is a mechanical element: a triangular prism with a thin edge at one end and a broad face at the other, designed to convert a driving force applied to its broad end into perpendicular forces against its inclined surfaces, thereby separating, lifting, o…
A pulley is a simple machine consisting of a grooved wheel mounted on an axle, through which a rope or cable runs, designed to redirect tension and provide mechanical advantage when lifting or moving loads. Parameters: (1) grooved wheel — the wheel has a chan…
Play is voluntary, intrinsically motivated activity whose purpose lies in its own performance rather than any separable outcome. Parameters: (1) voluntary engagement — the actor may withdraw at any point without external penalty; (2) intrinsic motivation — th…
A fulcrum is a pivot point used in the analysis and construction of lever systems, where an external support allows a rigid bar to rotate and multiply force. Its parameters: (1) the pivot location along the bar, (2) the input arm length (distance from effort…
Mechanical advantage is the factor by which a mechanism multiplies input force to produce greater output force, quantified as MA = F_out / F_in. Its parameters: mechanical configuration (lever arm ratio, pulley count, gear ratio, incline geometry), load force…
Probabilistic reasoning is a human-made method of drawing conclusions under uncertainty by assigning and manipulating numerical degrees of belief (probabilities) according to the axioms of probability theory. Its parameters are: (1) a formal probability space…
Empiricism is an epistemological framework that treats sensory experience, observation, and experimentation as the primary or sole sources of knowledge. It carves knowledge into a hierarchy: raw observation, measured data, inductive generalization, and tested…
Declarative memory is the cognitive system for storing information that can be consciously accessed and verbally reported. It operates through three parameters: (1) content — factual knowledge (semantic) or autobiographical events (episodic); (2) encoding — t…
Epidemiology is the study of the distribution (who, when, where) and determinants (causes, risk factors) of health-related states in specified populations. It operates through three core parameters: (1) population-level observation rather than individual diag…
Formalization is the process of converting informal knowledge, concepts, or practices into explicit, structured representations using formal languages — mathematical notation, logical calculus, programming languages, or standardized symbolic systems. Its para…
Phenology is the scientific discipline concerned with the timing of recurring biological events in plants and animals — including flowering, leaf-out, migration, breeding, and hibernation — and their relationship to environmental and climatic variables such a…
A measurement model is a statistical framework that defines how latent (unobserved) variables manifest as observable measurements through indicator variables. It specifies the loadings (relationships) between each latent variable and its measured indicators,…
A latent variable is an unobserved construct inferred from a set of observed measurements through statistical modeling. It represents underlying properties or dimensions — such as intelligence, socioeconomic status, or psychological disposition — that cannot…
A structural equation model (SEM) is a multivariate statistical method for specifying, estimating, and testing hypothesized relationships among observed variables and latent (unobserved) constructs. Parameters: (1) a structural equation system — one or more s…
self-reflection is a human-made cognitive practice in which an agent turns attention inward to examine its own mental states, decisions, or processes. It operates as a meta-cognitive routine that generates representations of prior thoughts or actions for eval…
Function calling is the pattern of instructing a language model to produce structured output (typically JSON conforming to a schema) that specifies which pre-defined function to invoke and with what arguments. Its parameters include the function schema (name,…
Technology-transfer is the organized practice of moving technology, knowledge, or innovations from their origin (research institutions, development teams) to new contexts for application, commercialization, or scaling. Parameters: (1) a source domain where th…
Formal verification is a mathematical approach to ensuring that a system (software, hardware, or protocol) satisfies specified correctness properties. It replaces empirical testing with rigorous proof, using techniques such as model checking, theorem proving,…
In-context learning is a neural network paradigm where a model adapts its behavior to new tasks using only the examples provided within the input sequence, without any parameter updates. Parameters: (1) a pretrained model with capacity for generalization, (2)…
Lossy compression is a data encoding method that reduces file size by permanently eliminating certain information — discarding perceptually or statistically redundant data so the decoded output is an approximation of the original, not a bit-for-bit replica. P…
Alignment is the human-built practice of engineering AI system behavior to match human intentions, values, and safety requirements. Its parameters are: (1) the target specification of desired behavior or values, (2) the alignment method (reinforcement learnin…
A caching mechanism is a human-built system that stores copies of data in a fast-access layer, substituting for direct retrieval from a slower primary store. Its parameters are: (1) the data items held in the fast layer, (2) the eviction policy that decides w…
An alphabet is a writing system composed of a finite set of graphemes, each representing one phoneme (consonant or vowel) of a spoken language. Its parameters are: (1) the inventory of graphemes, (2) the phoneme-to-grapheme mapping function, and (3) the ortho…
A gate is a human-built barrier installed within or across a boundary — a wall, fence, hedge, or opening — that controls passage by opening or closing. Its parameters are: (1) the aperture it can expose or conceal, (2) the actuation mechanism (manual, mechani…
A canticle is a short hymn or poem of praise, particularly one drawn from or modeled on biblical scripture. It operates as a liturgical utterance — a structured verse form designed for chanting or singing within worship. Parameters: (1) brevity — typically sh…
A reranking is a two-stage ranking strategy where an initial broad retrieval produces a large candidate set, which is then reordered by a more computationally intensive scoring model to improve final relevance. The first stage uses fast approximate retrieval…
The key-value cache is a buffer that stores precomputed key and value tensors from transformer attention layers during autoregressive text generation. When a model generates tokens sequentially, it reuses these cached values instead of recomputing attention o…
Quantization is the technique of mapping continuous or high-precision numerical values to a discrete, lower-precision representation. Its defining parameters are: (1) source precision — the original numeric format (e.g., FP32, FP16), (2) target precision — th…
Weight-sharing is the architectural pattern wherein a single set of parameters is applied across multiple locations, layers, or time steps of a computational model. Its defining parameters are: (1) a parameter set that is reused rather than instantiated separ…
Hallucination is a failure mode in generative AI systems where the model produces outputs that are factually incorrect, internally inconsistent, or ungrounded in the provided context, while presenting them with the same confidence as correct outputs. Paramete…
Retrieval is the cognitive mechanism by which stored information is accessed and brought into active conscious processing. Parameters: (1) target — a previously encoded and stored memory trace; (2) cue — internal or external stimulus that triggers the search;…
A positional encoding is a human-designed method of injecting sequential position information into model representations, enabling architectures without inherent sequential bias (such as self-attention) to distinguish the relative or absolute position of elem…
A feed-forward network (FFN) is a neural network module consisting of two linear projections separated by a non-linear activation function (ReLU or GELU). Given an input vector x and hidden dimension d_hidden, it computes FFN(x) = W2·activation(W1·x + b1) + b…
Semantic memory is the human-made cognitive category for storing general knowledge, facts, concepts, and meanings independent of personal experience or episodic recall. It is a construct of cognitive psychology that classifies memory types, enabling researche…
Model quantization is a model compression technique that reduces the numerical precision of neural network weights and activations during inference or training, converting high-precision representations (e.g., FP32 or FP16) into lower-precision formats (e.g.,…
Temperature is a human-made scalar parameter that scales the logit outputs of a language model before softmax sampling, thereby controlling the randomness and creativity of token selection. Higher temperatures flatten the probability distribution (increasing…
A finite token buffer that defines the maximum span of text a language model can process in a single inference step. It is a deliberately imposed architectural constraint — set during model design — that limits long-range co-reference, determines the scope of…
Zero-shot is an evaluation technique in machine learning where a trained model is tested on tasks or classes not encountered during training. Its operation rests on three parameters: (1) a pre-trained model with broad capability acquired through prior trainin…
A language model is a statistical model that assigns probabilities to sequences of tokens, encoding learned regularities from training data to predict, generate, and interpret language. It operates through three parameters: (1) a vocabulary mapping tokens to…
self-attention is a neural network mechanism where every position in a sequence computes attention weights over every other position in that same sequence — producing a context-aware representation for each position that depends on the full input. It carves b…
transformer is a class of neural network architecture built around self-attention mechanisms — a design where every position in a sequence can attend to every other position, enabling parallel processing of sequential data and capturing long-range dependencie…
model architecture is the structured blueprint that specifies how the components of a machine learning model are organized and connected — the topology of layers, the flow of tensors through operations, and the arrangement of parameters that determine the mod…
A neural architecture is a human-designed blueprint specifying the arrangement, connectivity, and operations of layers and neurons in a neural network. Its parameters include: (1) the number and type of layers (convolutional, recurrent, fully-connected, atten…
user experience (UX) is the structured concept of how a human interacts with a system — the mental model, emotional response, and behavioral feedback loop formed through use. It carves the space of human-system encounters by parameters: the interface medium (…
A sparse representation is a data encoding scheme in which a signal or dataset is expressed in a basis where the majority of coefficients are exactly zero or below a significance threshold. The concept is defined by three parameters: (1) the ambient dimension…
Semantic search is an information retrieval technique that represents texts as numerical vectors (embeddings) and retrieves documents by computing similarity between query and document vectors in a shared space. Its parameters are: (1) a vector representation…
Embeddings are a representational construct in machine learning and information retrieval. An embedding maps discrete, symbolic objects — words, items, users, or categories — into a continuous vector space of real numbers such that semantic, functional, or re…
A search-engine is a computational system designed to locate, retrieve, and rank relevant items from a collection of data in response to a user query. Its operation rests on three parameters: (1) an index — an inverted mapping from searchable terms to the doc…
A generative model is a computational construct that learns the underlying probability distribution of a dataset and uses it to produce new, synthetic samples. Parameters: (1) a training distribution over observed data, (2) a parameterized family of distribut…
Zero-shot learning is a machine learning paradigm in which a trained model is evaluated on classes it never encountered during training. Instead of relying on labeled examples of target classes, the model bridges the training-test gap through auxiliary semant…
Skill acquisition is the process by which humans develop competence—procedural knowledge, motor control, and perceptual discrimination—through structured practice, instruction, and feedback. It transforms novices who must consciously deliberate each step into…
Capacity is the human-constructed metric for the maximum amount of a resource, effort, or output that a system can sustain or absorb. Its parameters are: (1) a bounded domain (cognitive, physical, structural, economic), (2) a measurable limit under specified…
Episodic memory is the cognitive psychology construct for classifying a memory system that encodes and retrieves personal experiences — events tied to specific times, places, and emotional contexts. Its parameters are: (1) autobiographical content (first-pers…
A statistical measure is a human-constructed quantitative metric designed to summarize, describe, or evaluate properties of data distributions or statistical models. Its parameters are: (1) a domain-specific formula or computation rule, (2) a data type or dis…