Starting Anew from How Length Is Defined

01Why begin with the definition of length?

The author’s preface follows. The web subheadings are editorial additions; the original order of argument is retained.

Anisotropic Space Dynamics (ASD) does not begin with a predetermined picture of the universe. Nor does it first declare what geometric form spacetime ought to have and then search for experiments that agree with it. It begins with a more elementary question, and one that is harder to avoid: how, precisely, is length defined, realized, and compared?

Although this question appears to belong to metrology, it lies at the deepest foundation of physical theory. Every theory must ultimately connect its symbols with measurable results. If that connection uses mutually inconsistent rules for different phenomena, the physical interpretation may retain unresolved fractures even when the mathematical formalism is highly successful. What ASD attempts to do is to move this “measurement interface,” usually placed at the end of a theory, back to the beginning of theoretical construction.

Major changes in fundamental physics often occur where old concepts, new experiments, and new measurement capabilities press against one another. The tension between classical mechanics and electromagnetism drove the transformation of ideas about space and time in the early twentieth century; blackbody radiation, the photoelectric effect, and atomic spectra forced the continuous classical picture to give way to a quantized description. ASD likewise arose from a conceptual tension: modern measurement science has anchored the basic units in natural constants and reproducible physical processes, yet the connection between these metrological practices and the special-relativistic interpretation of length, time, and frequency still deserves re-examination from the foundations of measurement.

02From material standards to natural constants

The birth of metrology is commonly traced to the signing of the Metre Convention in 1875. The initial international establishment of the General Conference on Weights and Measures served political rather than scientific purposes, and the creation of international metrological organizations had a pronounced economic and political background. The growth of industrial production and international trade in the nineteenth century made the lack of uniform weights and measures across countries increasingly problematic. Unifying quantity values and coordinating the custody and comparison of standards became important matters of intergovernmental cooperation. On 20 May 1875, 17 countries signed the Metre Convention in Paris, establishing the International Bureau of Weights and Measures (BIPM) and an institutional framework in which the General Conference on Weights and Measures (CGPM) and the International Committee for Weights and Measures (CIPM) undertook decision-making and supervisory responsibilities. Its first response was to the practical need for international uniformity and coordination in weights and measures, rather than to a direct objective of founding a new theory of fundamental physics. This does not mean, however, that scientific needs were absent: from the outset, the Convention gave the BIPM a scientific character and prescribed comparisons of prototypes and related precision-measurement tasks.

The early work of this system centered mainly on standards of length and mass. The 1921 revision of the Metre Convention expanded its responsibilities to include electrical units and determinations of physical constants that could improve measurement precision. As science and technology advanced, international metrological cooperation gradually extended from the preservation and comparison of prototypes to more physical quantities and their measurement methods. In 1960, the 11th CGPM formally adopted the name “International System of Units” and its abbreviation SI, establishing a common language of units for science, technology, industry, and trade. The creation and continuing development of the SI brought measurement science more deeply into the broader course of scientific progress.

This evolution is inseparable from the advances of twentieth-century physics. Quantum mechanics and atomic physics supplied the foundations for atomic frequency standards and quantum electrical metrology; relativity supplied a theoretical framework for precision time and frequency comparisons involving motion and gravitation. Measurement science thus continually absorbed the achievements of fundamental physics and, in turn, tested physical theories through increasingly precise experiments. Revisions of unit definitions give a concentrated expression, at the foundations of measurement, to this reciprocal development.

In 1967, the 13th CGPM redefined the second through the periodic process corresponding to the ground-state hyperfine transition of caesium-133. In 1983, the 17th CGPM defined the metre through the path traveled by light in vacuum during a specified time interval. The SI revision adopted in 2018 and effective in 2019 further expressed the unit system in a unified way through the fixed numerical values of seven defining constants. In the current SI, the fixed value of the speed of light and the caesium-133 transition frequency jointly specify the relation between the metre and the second. This history reflects advances in unit definitions and realization techniques, but it also has a deeper epistemological significance: the unit of length no longer depends on preserving a particular physical object, but is established through a propagation speed and a periodic process. The realizations of frequency, duration, and length therefore enter the same metrological chain.

A strict distinction is necessary here: changing a unit definition does not automatically change the laws of nature, and ASD does not claim that “rewriting the definition of the metre yields a new physics.” It proposes a requirement at a different level. When physical theory explains the measurement results formed through these definitions, rod length, optical path, wavelength, propagation time, and frequency must follow a common logic for the formation of quantity values; they cannot be treated as unrelated objects in different theoretical contexts. The modern definition of the metre is not the whole proof of ASD, but it exposes this demand for consistency in its clearest form.

Measurement science is therefore more than a technical department concerned with calibrating instruments and reducing uncertainty. Indeed, it does not merely provide physics with measurement tools; it also specifies how physical quantities are defined, reproduced, and compared. In the modern International System of Units in particular, the basic units are already defined by natural constants, giving length, time, frequency, and the speed of light a deeper operational connection. Under these circumstances, changes in metrological definitions are not merely technical progress; they also call on physics to re-examine its fundamental concepts. Within the basic framework of the International Vocabulary of Metrology, quantity, unit, quantity value, measurement model, measurement uncertainty, and metrological traceability jointly specify how a measurement result acquires physical meaning. Theoretical physics may propose structures that cannot be observed directly, but it cannot bypass the mapping from theoretical quantities to measured quantities. ASD treats this mapping itself as an object that must undergo physical scrutiny.

Original bibliography: 1 · 2 · 3 · 4 · 5 · 6 · 7。

Further reading: Metrological foundations。

03From propagation and cycles to the Length Vector Effect

For a propagation process that can be described by a definite rate of advance, the path scale $S$, propagation speed $v$, and duration $t$ satisfy the most elementary kinematic relation:

When this relation is applied to light propagation in vacuum, with the speed of light $c$ taken as a defining constant, it gives:

This is the direct starting point of ASD. The importance of the SI definition of the metre is that it institutionalizes this relation as the definition and realization of the modern unit of length. At the level of logic, however, the propagation relation precedes the institutional text. In other words, the SI is not the source of the law of nature; it is the standardized expression of this propagation relation in the modern metrological system.

ASD also understands time $t$ as a process quantity, rather than an entity that flows independently of physical processes. Every measurement of duration is completed by comparing the process being measured with a reference periodic process. A clock does not display “time itself,” but the accumulated count of its internal periodic process. When environment, motion, or gravitation changes an atomic transition frequency, the first physical fact obtained is that the rate at which the standard evolves has changed. Whether this is further interpreted as a change in “time itself” is a matter of theoretical interpretation, rather than a conclusion supplied automatically by the measurement result.

If the reference process has a period $T$, the distance through which light advances during one period is:

Geometric length, propagation length, and wavelength consequently no longer have three mutually independent sets of metrological rules. Wavelength is not a subsidiary quantity that merely “looks like length”; it is a length quantity realized by a propagation process under periodic conditions. From this, ASD proposes its first methodological constraint: all length quantities, under the same measurement conditions, should obey unified directional rules; all frequency changes should first be traced to changes in specific physical processes, rather than treating abstract time as a cause that needs no mechanism.

When there is an angle $\phi$ between the measurement direction and the direction of motion, ASD further incorporates the propagation direction into a complete description of a length quantity. Chapter 1 derives the following Length Vector Effect formula:

It gives forward contraction, backward extension, and transverse expansion, and is related to the directional structure of the optical Doppler factor. The point is not that renaming length a “vector” completes the theory. Rather, it is to propose a physical proposition that can be tested: a state of motion makes the realization of length quantities direction-dependent, and this dependence should appear in optical paths, wavelengths, material scales, and measurement devices coupled to them.

The directional relation follows the final preface. See ASD-WEB-LVE-008 for its registered expression and the measurement configuration and normalization conditions used in Chapter 1.

Further reading: Time and clocks · LVE derivation and physical meaning。

04The dispute between real standards and abstract spacetime explanations

The grand edifices of special and general relativity are built, to a considerable extent, upon a series of thought experiments. These thought experiments abound in “ideal clocks” and “rigid measuring rods” detached from specific physical mechanisms. Theoretical physicists freely stretch or bend time and space in coordinate systems, attributing physical effects to geometric transformations.

Measurement science is founded on operations involving physical entities. Whether a standard is one of length or of frequency, its establishment rests on an operational physical entity, not merely on an abstract mathematical concept. From the standpoint of measurement science, what is established is not a “time standard,” but the dynamic rate of evolution of a particular physical system—such as a hydrogen maser or a caesium atomic-level transition—in the current spatial environment: its frequency. When mainstream theory forcibly equates a change in the real atomic radiation frequency in space with “time dilation” in an abstract dimension, it has in fact crossed the boundary of physics and slid into an idealist deification through mathematics. Atomic clocks are chosen as frequency standards in modern measurement science not because they embody “time,” but simply because they offer the highest accuracy. From the standpoint of measurement standards, there is no essential difference between an atomic clock and a pendulum clock; the difference lies only in their accuracy. Temperature changes the frequency of a pendulum clock, yet no one supposes that temperature makes “time dilate.” Likewise, gravitational potential changes the frequency of an atomic clock. In metrological terms, to say that gravitational potential makes time dilate is as absurd as saying that temperature makes time dilate.

The most damaging neglect of metrological constraints in theoretical physics is its failure to reflect deeply on the physical implications of the evolving definition of “length.” In the age of material measuring rods—such as the platinum–iridium prototype metre kept in a Paris vault—treating length as a rigid scalar in Euclidean space, independent of motion, was empirically self-consistent. Using the Lorentz transformation, special relativity stitched together the constancy of the speed of light, spatial isotropy, and the measurement results of material rods by mathematical devices.

But when the definition of the “metre” was taken over entirely by the propagation distance associated with the speed of light in vacuum, physical measurement underwent a profound transformation at its foundations. Length was no longer an isolated, static geometric quantity, but a dynamic quantity closely bound to the propagation mechanism of electromagnetic waves—light. Since light propagation has wave properties, and relative motion necessarily entails a Doppler frequency shift, this means that, in a moving reference frame, “length” defined through the speed of light must exhibit directional differences. In essence, it has changed from a scalar into a vector intimately connected with motion and light propagation.

Further reading: The detailed comparison with relativity。

05Historical dissent and the conceptual gulf in metrology

Herbert Dingle and Louis Essen have particular significance in twentieth-century debates about relativity—not because their conclusions have been accepted by the academic community, but because they directed the dispute toward the logic of measurement. Dingle had served as president of the Royal Astronomical Society and was himself an early expositor of relativity. He later persistently questioned the clock paradox: in a symmetric inertial description, each observer judges the other's clock to run slow; how is this connected to a specific physical comparison? His arguments met with public rebuttals from several physicists. Mainstream theory held that proper time, worldlines, and the actual comparison process were sufficient to remove the contradiction; Dingle maintained that these answers did not address the logical core he emphasized. Late in life, Dingle wrote Science at the Crossroads, accusing the academic community of refusing to confront a fundamental logical contradiction in order to preserve its position and save face. He was one of the best-known critics of relativity in the twentieth century. Mainstream relativity theorists ultimately dismissed his criticism as a misunderstanding of the core concepts of special relativity. Although the controversy did not alter relativity's mainstream position, it left a historical example of how a scientific community handles foundational dissent.

The other was the British physicist and metrologist Louis Essen, the inventor of the caesium atomic clock; one could say that no one understood the measurement of time better than Essen. His position arose more directly from metrological practice. He remeasured the speed of light, led the construction of the world's first working caesium atomic clock, and prepared the way for redefining the second through the caesium frequency. The official biography published by Britain's National Physical Laboratory also expressly records that he challenged certain aspects of Einstein's special relativity. In The Special Theory of Relativity: A Critical Analysis, published in 1971, Essen repeatedly distinguished changes in the reception rate of clocks or time signals from changes in “time itself.” His criticism did not form a complete alternative framework capable of taking over from the existing theory, and therefore did not change the academic consensus. For ASD, however, the question he left remains valid: when we say that a clock runs slow, have we measured an atomic frequency, a signal reception rate, or the rate at which an independent entity flows?

Unlike the major debate that Dingle provoked with mainstream theorists, Louis Essen's opposition did not attract much discussion. On the one hand, Dingle's main arena was leading general scientific journals such as Nature. By repeatedly publishing readers' letters and openly debating prominent physicists such as Max Born, he made the issue a public event of concern across the academic community. Rebuttals from other scholars further increased his visibility. Essen, by contrast, never launched a sustained controversy in leading physics journals, publishing only a separate booklet and articles in engineering journals. Mainstream academia adopted a strategy of “neither responding nor discussing,” and there was no public controversy to amplify his voice. On the other hand, Dingle sustained his campaign for more than twenty years, from the 1950s to the 1970s, and, as a former president of the Royal Astronomical Society, was already a public figure in academia who naturally attracted attention. Essen formally made his criticism public only in 1971 and retired in 1972, leaving a very short period of public intervention. He was also a low-profile experimental scientist who was not adept at public debate, so his influence was naturally limited. As with Dingle, mainstream physics did not accept Essen's criticisms. It held that he confused the “operational definitions of physical quantities” with the “postulatory foundations of physical theory,” and that his objections fundamentally reflected the difficulty classical metrological intuition had in accommodating the relativistic view of spacetime, rather than identifying a genuine logical flaw in the theory. Essen ultimately stopped publishing papers opposing relativity after facing academic intimidation. The NPL's official page expressly records that Essen retired in 1972 and had previously been privately warned against continuing to oppose Einstein's theory of relativity publicly. The academic intimidation that Essen suffered vividly bears out Dingle's accusation against the academic community in Science at the Crossroads.

The attitude of theoretical physics toward criticism from a metrologist such as Essen—an experimental physicist who spent his entire career on research related to measuring time—reveals an “ignorant arrogance” toward measurement science. Ideas developed in metrology about the definition and uniformity of quantity values, the consistency of traceability, and related matters have not entered mainstream theoretical physics. Although the metrology of basic physical quantities such as length and time has advanced into the twenty-first century, the understanding of mainstream theoretical physics remains in the early twentieth century, when length was still defined by the “international prototype metre.”

There is a large conceptual gulf between mainstream physical theory and measurement science, possibly connected with four factors. First, unit definitions are often treated as human conventions, so the feedback between definition, realization, and theoretical interpretation is underestimated. Second, the division of labor among theoretical physics, experimental physics, and measurement science has long positioned metrology as a discipline that “measures established physical quantities more accurately,” rather than one that examines fundamental concepts. Third, the immense mathematical success of a mature theory naturally generates conceptual path dependence: people readily equate “effective formalism” with “unique interpretation.” Fourth, research that departs from the mainstream paradigm bears higher costs in funding, employment, publication, and peer evaluation; institutional incentives and cognitive inertia reinforce one another.

The limitations of Dingle and Essen must also be acknowledged. They remained primarily at the level of criticism and did not systematically construct, from metrological constraints, a unified alternative model of kinematics, gravitation, electromagnetism, and matter structure. Thomas Kuhn pointed out that an old paradigm is not usually abandoned merely because anomalies or conceptual controversies exist. A genuine shift becomes possible only when a new paradigm can organize more facts and provide a workable research program. ASD values the measurement questions raised by these predecessors, but does not take their critical conclusions about relativity as premises. What it seeks to do, on the basis of the mathematical and experimental achievements accumulated in modern physics, is to turn metrological questions into mathematical structures, dynamical mechanisms, and falsifiable experiments of its own.

Original bibliography: 8 · 9 · 10。

06From criticism to an independent spatial-dynamics construction

ASD is not a theory whose purpose is to criticize relativity. It begins with the tension between measurement science and special relativity in order to advance its own construction of spatial dynamics. In special relativity, the constancy of the speed of light, the Lorentz transformation, and spatial isotropy together form a highly successful mathematical system. Length contraction along the direction of motion, unchanged transverse length, and the slowing of moving clocks are organized into a unified account of spacetime geometry. ASD's disagreement is neither a denial of the constancy of the speed of light nor a denial of the effectiveness of Lorentz-type mathematical factors in a great many experiments. Its questions are whether these mathematical relations can be interpreted only as time dilation and four-dimensional spacetime geometry, and whether transverse invariance can genuinely be derived from the constancy of the speed of light alone.

This distinction is crucial. The same mathematical factor can arise from different physical models. Experiments primarily support relations between quantity values; they do not automatically select a unique ontological interpretation. ASD accepts the constraints that experimental data impose on formulas, but calls for time, length, and frequency to be restored to specific physical processes: optical path differences correspond to changes in propagation paths; clock differences correspond to changes in frequency standards; motion effects correspond to directional changes in spatial scales and field distributions. The real competition between theories should not stop at “both can write down the same factor.” It should turn on whether each can supply a more consistent measurement model, whether it produces different higher-order effects, and whether it can propose experiments that distinguish the alternatives.

The purpose of discussing these conceptual connections is to advance a calculable and testable theoretical construction. Measurement science has grown within the achievements of modern physics, and it can also raise new foundational questions from its own practice. More precisely, a mature paradigm possesses a complete system of textbooks, experimental explanations, and a research community. Before an alternative framework supplies an equally complete set of equations and predictions, conceptual criticism alone can rarely change academic judgments. For this reason, ASD cannot be content merely to identify doubts about the old explanation; it must assume responsibility for building an alternative dynamics, recalculating classical experiments, and proposing new tests.

Further reading: Experiments and tests。

07From LVE to gravity, electromagnetism, matter and quantum phenomena

“Anisotropy” does not primarily mean that the universe has an arbitrarily assigned absolute direction. It means that motion and propagation select local directions, so that the effective quantity values of length, fields, and matter structure no longer possess a priori directional equivalence. ASD therefore does not view space as an empty background serving only for coordinate labels. It attempts instead to view space again as a physical entity capable of longitudinal density changes, transverse shear and twisting, and phase refresh.

From this starting point, the book follows a route that deepens layer by layer. The first is the metrological–kinematic layer: it uses $r=ct$ to establish a directional description of length quantities, derives the Length Vector Effect, and reinterprets the optical Doppler effect, the Michelson–Morley experiment, Fizeau's moving-water experiment, the Sagnac effect, and moving electromagnetic wavefronts. The second is the gravitation and dynamics layer: it interprets gravitational redshift as a change in spatial scales and material frequency standards, traces gravitation and inertia to longitudinal density gradients in space, and tests whether this picture can reproduce light deflection, Shapiro delay, planetary precession, and momentum and mass–energy relations. The third is the electromagnetic layer: it derives a magnetic-force formula between charges moving in parallel from the Length Vector Effect formula, understands magnetic force as a transverse distortion of the Coulomb field caused by motion, and examines the unified connection among vector potential, electromagnetic propagation, and the Length Vector Effect.

At a deeper ontological layer, the book proposes a candidate picture that remains to be developed: space may have a discrete FCC microscopic structure and a continuum-medium limit; open transverse twisting may appear as propagation modes, while closed twisting may form stable topological knots of matter; longitudinal density modes are associated with mass, gravitation, and neutrino-like wave packets. Matter waves and double-slit interference are described jointly by a moving topological core and its causal accompanying field. The tools of topology, elastic-medium theory, and effective field theory used here are not exclusive to ASD, but ASD specifies their physical objects, variable correspondences, and metrological starting point anew.

The aim of this route is not to rename existing theories, but to seek a common mechanism at a deeper level: can the length factors of kinematics, spatial-scale changes of gravitation, field distortions of electromagnetism, and phases and accompanying fields of quantum phenomena arise from the same dynamics of a spatial medium at different scales? If the answer is yes, parts of the mathematical structures of relativity and quantum theory will be retained as effective approximations, while their physical interpretations will be rewritten. If the answer is no, ASD must likewise be revised or abandoned at explicit points of experimental disagreement.

The Length Vector Effect is not the conclusion of the book, but its seed. It matters not only because a directional factor may rewrite the interpretation of length in motion, but because it supplies a single question running through the chapters: does a change in an observable come from relabeling abstract coordinates, from the response of a measurement standard, or from a real dynamical change in space and matter?

In optics, this question requires wavelength, frequency, and propagation path to be placed within one measurement model. In gravitation, it requires distinguishing photon propagation, atomic transition frequency, and the so-called “rate of time flow.” In electromagnetism, it requires distinguishing field components produced by a coordinate transformation from field structures genuinely produced by moving charges. In quantum problems, it requires a calculable model of the propagation carrier behind the probability amplitude, phase updating, and detector coupling. The parts of the book then cease to be scattered reinterpretations of individual phenomena and become an unfolding of the same metrological first-principles approach across different physical levels.

Further reading: The spatial construction of gravity · Coulomb interaction and magnetic force。

08Theoretical levels and experimental tests

The book will also seek to distinguish “the same mathematical form” from “the same physics.” Obtaining the same formulas as a mature theory in weak-field or low-speed limits does not automatically prove ASD, nor does it mean that ASD is merely an old theory renamed. It shows only that the two frameworks may share an effective structure at the precision currently available. Genuine discrimination lies in their different predictions for higher-order terms, directional dependence, material dependence, mechanisms of field propagation, and the response of standards.

Begin not with a philosophy of space, but with how length is defined;

claim victory not through identical formulas, but submit to tests through different predictions.

To avoid presenting research proposals as established theorems, the book divides ASD's content into three levels. The first comprises definitions, assumptions, and conditional derivations: it states explicitly $r=ct$, time as a process quantity, directional variables, and the mathematical premises of the Length Vector Effect, and checks the internal consistency of the derivations. The second reconstructs existing experiments: without changing the experimental data, it compares the explanatory routes of ASD and mainstream theory, identifying which phenomena demonstrate only the effectiveness of formulas and which can distinguish physical mechanisms. The third comprises candidate models of the ontology of space and unified dynamics, including FCC structure, topological particles, accompanying fields, longitudinal–transverse two-field coupling, and a complete master equation. This level remains a research program under low-energy, long-wavelength, and continuum-medium approximations; it cannot be described as a final theory already closed from first principles.

This division into levels is not a retreat, but the honesty required for a theory to grow. The most dangerous condition for a new framework is not temporarily lacking an equation; it is being unable to distinguish derived conclusions, an Ansatz used for calculation, parameters inferred from experiments, and purely physical conjectures. The book will seek to identify these roles in each chapter: strictly derivable results will be accompanied by complete steps; effective models will have their approximation conditions stated; experimentally calibrated parameters will not masquerade as first-principles predictions; and questions that remain unclosed will be retained as tasks for further research.

ASD's value will ultimately be determined not by the grandeur of its narrative, but by falsifiability. The book pays particular attention to experimental windows that may separate it from existing explanations—for example, directional dependence in atomic frequency standards, material dependence and higher-order rotation-speed terms in the Mössbauer rotor effect, phase matching of ellipsoidal wavefronts for moving targets, and higher-order corrections under strong gravitation or high-speed conditions that differ from those of standard models. Any stable, repeatable counterexample that excludes systematic errors is worth more than countless expressions of agreement. Likewise, if experiments continue to exclude ASD's characteristic terms, the theory must narrow its domain of applicability or abandon the corresponding assumptions.

Further reading: Spatial dynamics and candidate microscopic realizations · Matter and quantum phenomena。

09How the author and AI collaborate

The making of this book also involves a mode of research seldom encountered in earlier monographs on fundamental theory: the author has engaged in long-term, repeated theoretical collaboration with artificial-intelligence (AI) models. The core physical intuition, the metrological questions, the Length Vector Effect, and ASD's ontological direction come from the author. The principal mathematical derivations developing these physical ideas have been undertaken by AI, including formula manipulation, equation expansion, and the mathematical construction of candidate models. In this mathematical work, the author has mainly been responsible for reviewing the premises, steps, physical meanings, and conditions of applicability of the derivations, and, on that basis, requesting revisions and deciding what to retain or reject. AI has also participated in dimensional checks, checks against existing experiments, searches for counterexamples, and preparation of the manuscript.

This division of labor does not automatically turn AI-generated derivations into scientific proofs. Artificial intelligence can readily inherit the default premises of the mainstream paradigm, and may also produce derivations that are formally coherent but unsupported. Collaboration therefore requires continuing review and revision: the author first poses the physical questions and constraints; AI then develops them into variables, equations, and derivations. The author subsequently reviews the key steps, checking dimensions, symmetries, conservation laws, boundary conditions, and limiting behavior, and requires doubtful parts to be recalculated. When experiments are involved, the data sources must also be checked and predictions distinguished from fits. Parts that cannot be closed must remain explicitly unfinished; a proof cannot be considered complete merely because the text has taken shape. The author bears final responsibility for all arguments and errors in the book.

Human review is itself part of theoretical research. It must examine not only whether the mathematical steps hold, but also whether the calculation remains faithful to the proposed physical picture, and whether undeclared assumptions or conclusions that are themselves to be explained have been introduced along the way. AI can develop several mathematical routes relatively quickly; human measurement experience and physical judgment are used to assess their significance and limits. This collaboration creates a new possibility for original exploration without a large research team. It also requires an honest account of the division of contributions, so that readers can clearly distinguish the origination of physical ideas, the mathematical derivations undertaken by AI, and the review performed by the author.

Further reading: Researcher · Using the collaboration materials。

10Starting anew on the achievements of modern physics

Anisotropic Space Dynamics seeks to present an independent research framework developed from the foundations of measurement. It acknowledges the immense mathematical and experimental achievements of relativity, quantum theory, and modern field theory. Without more than a century of developments in relativity, quantum mechanics, and the associated experimental physics, there would be no modern measurement science grounded in atomic processes and natural constants, and no ASD theory of the kind discussed in this book. ASD's questions have grown out of these achievements. Offering different interpretations of some physical mechanisms does not alter that inheritance. Beginning with real measurements of length, frequency, and propagation processes, it seeks to advance the role of measurement science in constructing fundamental theory and to explore another route to unification.

Readers therefore need not first accept ASD's worldview. A more valuable way to read is to ask, item by item: are the definitions clear? Are assumptions hidden? Can the formulas be recalculated? Does an explanation confuse quantity-value relations with physical mechanisms? Has a candidate model crossed the boundary of the evidence? Are its experimental predictions genuinely different, and can they be implemented? If the book cannot withstand scrutiny on these questions, it should not be retained simply because its narrative is novel. If, on some of these questions, it provides answers more consistent and testable than the existing explanations, those parts deserve further development even while the complete theory remains unfinished.

The “new beginning” advocated by ASD returns, on the basis of more than a century of achievements in physics, to a starting point that no theory can bypass: how physical quantities arise from real processes, how measurement results acquire meaning, and how mathematical structures connect with physical entities. Establish length through $r=ct$; establish directional effects through length; return from directional effects to propagation, gravitation, and fields; then proceed from these phenomena to the ontology of space and the structure of matter. This is the route the book will develop.

Physics should begin not by deciding whom to believe, but with a question that can be measured repeatedly:

how, precisely, is length defined and measured?

Further reading: Accompanying fields and matter waves · Open problems。

11References

[1] Bureau International des Poids et Mesures (BIPM), The Metre Convention; Metre Convention and Annexed Regulations, signed in 1875 and revised in 1921; see Articles 1, 3, 6, and 7.

[2] 11th CGPM, Resolution 12 (1960): Système International d’Unités. DOI: 10.59161/CGPM1960RES12E.

[3] BIPM, The International System of Units (SI Brochure), 9th ed., version 4.01, 2026, pp. 113–114, 118, 126–128, 137; Appendix 4. DOI: 10.59161/AUEZ1291.

[4] 13th CGPM, Resolution 1 (1967): SI unit of time (second). DOI: 10.59161/CGPM1967RES1E.

[5] 17th CGPM, Resolution 1 (1983): Definition of the metre. DOI: 10.59161/CGPM1983RES1E.

[6] 26th CGPM, Resolution 1 (2018): On the revision of the International System of Units (SI), effective 20 May 2019. DOI: 10.59161/CGPM2018RES1E.

[7] JCGM 200:2012, International Vocabulary of Metrology — Basic and General Concepts and Associated Terms (VIM), 3rd ed. DOI: 10.59161/JCGM200-2012.

[8] Herbert Dingle, “The Case Against Special Relativity,” Nature 216 (1967): 119–122; Science at the Crossroads, London: Martin Brian & O’Keeffe, 1972.

[9] Louis Essen, The Special Theory of Relativity: A Critical Analysis, Oxford: Clarendon Press, 1971; National Physical Laboratory, “Louis Essen (1908–1997).”

[10] Thomas S. Kuhn, The Structure of Scientific Revolutions, Chicago: University of Chicago Press, 1962.

12From the preface to theory and research

The preface is the main reading entrance. The full introduction, origins, core principles and theory comparison remain supplementary reading. Learning paths and the graph help choose the next topic; they do not replace the text above.

Use the existing open-problem registry, learning paths and theory map to plan the next step.