Isomorphism Hypothesis Research Articles

Sinkhorn Distance Minimization for Adaptive Semi-Supervised Social Network Alignment.

Social network alignment, aiming at linking identical identities across different social platforms, is a fundamental task in social graph mining. Most existing approaches are supervised models and require a large number of manually labeled data, which are infeasible in practice considering the yawning gap between social platforms. Recently, isomorphism across social networks is incorporated as complementary to link identities from the distribution level, which contributes to alleviating the dependency on sample-level annotations. Adversarial learning is adopted to learn a shared projection function by minimizing the distance between two social distributions. However, the hypothesis of isomorphism might not always hold true as social user behaviors are generally unpredictable, and thus a shared projection function is insufficient to handle the sophisticated cross-platform correlations. In addition, adversarial learning suffers from training instability and uncertainty, which may hinder model performance. In this article, we propose a novel meta-learning-based social network alignment model Meta-SNA to effectively capture the isomorphism and the unique characteristics of each identity. Our motivation lies in learning a shared meta-model to preserve the global cross-platform knowledge and an adaptor to learn a specific projection function for each identity. Sinkhorn distance is further introduced as the distribution closeness measurement to tackle the limitations of adversarial learning, which owns an explicitly optimal solution and can be efficiently computed by the matrix scaling algorithm. Empirically, we evaluate the proposed model over multiple datasets, and the experimental results demonstrate the superiority of Meta-SNA.

ГЕОГРАФІЧНА ІНТЕРПРЕТАЦІЯ ТУРИСТИЧНОГО ПРОЦЕСУ

The most important tasks of geography in the context of shaping the theoretical foundations of tourism include the need to substantiate the essence of an integral epistemological object (tourist system) and identify the mechanisms of its functioning. The presence of tourist processes is the main essence of the actual existence of the tourist system. The objectively inherent conditions for the implementation of any process are as follows: the presence of an object or phenomenon, that is, the actual substance that changes or is in the process; presence of time changes; the presence of spatial connections and their geospatial localization; the geospatial and temporal orientation of object changes. The tourist system is considered as a generalized object, that is, a substance that changes or is in the process, and in the context of geographic methodology it is conceptualised as a tourist-geographic system. The mechanism of the functioning of the tourist system should be understood, first of all, as connections and relations within the system that are formed under the influence of a set of factors and subordinate to the general goal of the system. In order to clarify the essence and peculiarities of the tourist process, we substantiate the hypothesis of isomorphism of transport, transport-geographic and tourist processes, the common defining feature of which is mutual relations. Connections mean material, energy and informational exchange between geographical objects. Primarily territorial connections, namely those connections that are carried out by overcoming space, are considered. The common features of the given definitions are: first, the presence of a transportation operation in the each of them, the essence of which is the spatial (territorial) movement of people; second, both transport and tourist processes are sub-processes of the general socio-geographical process, and therefore they cause changes both in the socio-geographical system in general and in the touristic-geographical system in particular. The definition of the tourist-geographical process is proposed as a set of actions and operations that make possible geospatial connections between the elements of the tourist-geographical system. The constituent parts of this process should be considered primarily the transportation and transfer of tourists from one type of transport to another, which have a clearly defined spatial and territorial character and constitute the essence of tourism (territorial movements, travel).

Comprehensive Study on Molecular Supervised Learning with Graph Neural Networks.

This work considers strategies to develop accurate and reliable graph neural networks (GNNs) for molecular property predictions. Prediction performance of GNNs is highly sensitive to the change in various parameters due to the inherent challenges in molecular machine learning, such as a deficient amount of data samples and bias in data distribution. Comparative studies with well-designed experiments are thus important to clearly understand which GNNs are powerful for molecular supervised learning. Our work presents a number of ablation studies along with a guideline to train and utilize GNNs for both molecular regression and classification tasks. First, we validate that using both atomic and bond meta-information improves the prediction performance in the regression task. Second, we find that the graph isomorphism hypothesis proposed by [Xu, K.; et al How powerful are graph neural networks? 2018, arXiv:1810.00826. arXiv.org e-Print archive. https://arxiv.org/abs/1810.00826] is valid for the regression task. Surprisingly, however, the findings above do not hold for the classification tasks. Beyond the study on model architectures, we test various regularization methods and Bayesian learning algorithms to find the best strategy to achieve a reliable classification system. We demonstrate that regularization methods penalizing predictive entropy might not give well-calibrated probability estimation, even though they work well in other domains, and Bayesian learning methods are capable of developing reliable prediction systems. Furthermore, we argue the importance of Bayesian learning in virtual screening by showing that well-calibrated probability estimation may lead to a higher success rate.

Psychophysical identity and free energy.

An approach to implementing variational Bayesian inference in biological systems is considered, under which the thermodynamic free energy of a system directly encodes its variational free energy. In the case of the brain, this assumption places constraints on the neuronal encoding of generative and recognition densities, in particular requiring a stochastic population code. The resulting relationship between thermodynamic and variational free energies is prefigured in mind-brain identity theses in philosophy and in the Gestalt hypothesis of psychophysical isomorphism.

Institutions: Everywhere But Not Everything

Recent critiques by Alvesson, Hallett, and Spicer have characterized neo-institutional theory (NIT) specifically as confronting a mid-life crisis and institutional theory (IT) more generally as uninhibited. While offering valid points, these critiques lack a fundamental understanding of how organizational institutionalism (OI) has become distinct from NIT. In contrast to NIT’s master hypothesis of isomorphism and focus on structural determinism, OI has made remarkable progress in explaining institutional variation and change. Notably, like organization theory more generally, OI is not a coherent theory, but rather a big tent community with its own set of internal differences, and at times confusing concepts. Rather than abandoning the concept of institutions, we suggest continued progress in OI requires greater clarification. Institutions are everywhere, but not everything, so it is important for researchers to specify which institutions are being studied, distinguish between institutions and culture, and ascertain the relationship between institutions and organizations.

The isomorphism hypothesis: The prisoner's dilemma as intertemporal allocation, and vice versa

Economists model the choice of the current self in intertemporal allocation as the outcome of identity: the current and future selves belong to the same decision maker by the sheer fact they reside in the same “biological skin” defined by biological identity. The economists should be consistent and likewise model the choice of each player in the prisoner's dilemma or, generally, the social dilemma as the outcome of identity: the selves of the players belong to the same decision maker by the sheer fact they reside in the same “social skin” defined by social identity. If the economists consider cooperation rather than defection to be the rational strategy of the current self in intertemporal allocations, they should be consistent and consider cooperation rather than defection to be the rational strategy of each player in social dilemmas. Symmetrically, if the economists judge defection rather than cooperation to be the rational strategy in social dilemmas, it behooves them to also judge defection rather than cooperation to be the rational strategy in intertemporal allocations.

Testing Trait-State Isomorphism in a New Domain: An Exploratory Manipulation of Openness to Experience.

The trait-state isomorphism hypothesis holds that personality traits and states (i.e., trait-related behavior) are characterized by similar outcomes (Fleeson, 2001). Openness is associated with creative thinking, personal growth, and positive affect. Engaging in behavior associated with openness has also been found to covary with feelings of authenticity. In the present experiment, participants (N = 210) completed a pre-test assessment, five daily exercises designed to either be inert (control condition) or engage the behaviors and cognitions associated with openness (experimental condition), a post-test assessment, and a 2 week follow up assessment. Results supported the isomorphism hypothesis for positive affect but not creative thinking ability or personal growth. Furthermore, open behavior was only associated with authenticity for individuals high on trait openness.

ЕКОНОМІЧНИЙ КОНТРОЛЬ СИЛАМИ ГРОМАДЯНСЬКОГО СУСПІЛЬСТВА: ІНСТИТУЦІОНАЛЬНИЙ ПІДХІД

The article studies the significance of public institutions for successful functioning of a market economy. The emphasis is placed on the fact that market institutions are formed through social organization and evolution. The structure of modern society is clarified; combination of professional performance of the functions of its social group and adherence to moral values are selected to be the main criterion of the structure. The hypothesis of isomorphism of the social structure is advanced, according to which the decrease in the share of people in civil society with rent-seeking behavior can lead to similar shifts in business and public sector. The system of economic control is proposed that corresponds to division of society into three main social groups. The new content of control, which proceeds from the concept of sustainable development and the theory of systems, is revealed. The essence of the new type of control is formation of socially significant analytical information capable of launching mechanisms of self-organization of enterprises, including self-control. The main corrective tool is the publication of these findings. Attention is paid to original sources of information for civil control (for example, financial and tax reporting of enterprises), which is not a commercial secret in accordance with Ukrainian legislation. Institutional mechanisms, such as compulsory mechanism of the law, normative mechanism of professional opinion, imitative mechanism of positive practice, promotion of information, involvement of supporters and cooperation with foundations are listed. It is concluded that the introduction of economic control by civil society can strengthen public institutions such as law, morality, property, enterprise, trust in society, fair competition, etc. This, most likely, will have a positive impact on development of the economy.

Ordoliberalizing the Neighbourhood? The EU's Promotion of Regulatory Reforms in Egypt

AbstractWhile the EU has long been promoting economic reforms in neighbouring countries, scant attention has hitherto been paid to its regulatory efforts. This paper addresses this empirical gap with reference to the EU's promotion of regulatory reforms in three economic sectors in Egypt: agriculture, banking and telecoms. It finds that these reforms are significantly, if selectively, informed by ordoliberal principles and practices. Two theoretical implications of this finding are explored. On the one hand, while this substantiates the institutional isomorphism hypothesis, for which the EU tends to export its own models elsewhere, the selectivity with which this occurs demonstrates greater instrumentality than usually maintained in this literature. On the other hand, understanding ordoliberalism as a variation within the neoliberal template shaping restructuring in Egypt, this paper moves beyond binary views of regulatory co‐operation and competition and thus also enriches debates on the EU as a global regulator.

Synaptic transmission as a cooperative phenomenon in confined systems

In this review paper, the theory of synaptic transmission (ST) was developed and discussed. We used the hypothesis of isomorphism between: (a) the cooperative behavior of mediators --- acetylcholine molecules (ACh) and cholinoreceptors in a synaptic cleft with binding into mediator-receptor (AChR) complexes, (b) the critical phenomena in confined binary liquid mixtures. The systems of two (or three) nonlinear differential equations were proposed to find the change of concentrations of ACh, AChR complexes, and ferment acetylcholinesterase. The main findings of our study: the linear size of the activation zone was evaluated; the process of postsynaptic membrane activation was described as a cooperative process; different approximations of ACh synchronous release were examined; stationary states and types of singular points were studied for the proposed models of ST; the nonlinear kinetic model with three order parameters demonstrated a strange-attractor behavior.

Isomorphic Viscosity Equation of State for Binary Fluid Mixtures

The thermodynamic behavior of the simple binary mixtures in the vicinity of critical line has a universal character and can be mapped from pure components using the isomorphism hypothesis. Consequently, based upon the principle of isomorphism, critical phenomena and similarity between P-ρ-T and T-η-(viscosity)-P relationships, the viscosity model has been developed adopting two cubic, Soave-Redlich-Kwong (SRK) and Peng-Robinson (PR), equations of state (EsoS) for predicting the viscosity of the binary mixtures. This procedure has been applied to the methane-butane mixture and predicted its viscosity data. Reasonable agreement with the experimental data has been observed. In conclusion, we have shown that the isomorphism principle in conjunction with the mapped viscosity EoS suggests a reliable model for calculating the viscosity of mixture of hydrocarbons over a wide pressure range up to 35 MPa within the stated experimental errors.

Generalized x‐to‐C in Germanic

AbstractThis paper highlights striking similarities of three well‐known but hitherto disparately treated alternations in Germanic morphosyntax: (i) the positional alternation of the finite verb between a low and a left peripheral (V2) position; (ii) the morphological alternation in adnominal adjectives between so‐called weak and strong agreement; and (iii) the contrast in definiteness marking between a free DP‐initial definite article and a so‐called suffixed article. The number and kinds of punctual similarities among these alternations suggest that we are dealing with a parallelism that is non‐accidental (even if not always fully surface apparent).In an attempt to propose a principled account of this parallelism, I argue that the familiar syntactic CP/DP analogy must (A) be extended to include the extended adjectival projection (xAP), and (B) that it is more than an analogy. It is, I claim, a point‐wise isomorphism. I identify a shared complementizer head C, which, I claim, extended projections of all colors converge on. In Germanic, C is either lexicalized/identified qua head, as d‐, or it attracts the lexical category of its containing extended projection, indiscriminately of whether it is verbal, nominal, or adjectival. Movement of the lexical category to the left periphery results, in many cases, in its preceding material which it does not precede in the absence of such movement, notably inflectional material.If correct, the proposed isomorphism hypothesis has consequences for the analysis of the phenomena involved in that it allows us to transfer insights from one domain to another. In particular, it supports an analysis of the adjectival inflection alternation in terms of adjective movement; and an analysis of V2 as involving two merger steps.

The Process of Rescaling Interests in the Belgian Context: The Impact of Regional Governmental Strength

To what extent do interest groups adapt to a changing institutional environment? That is the central question of this article. Keating [2014. Introduction: rescaling interests, Territory, Politics, Governance 2(3)] distinguishes three drivers that can force interest groups to rescale: a functional, an identitarian and an institutional driver. The focus of this article is on the last driver of rescaling and on the assumption that interest groups increasingly operate on a regional scale when regional governments acquire more power. This ‘isomorphism hypothesis’ is tested by analysing the adaptation of the principal labour and business groups in Belgium. We found that in Belgium, this hypothesis only accounts for a number of cases. The Belgian rescaling process is not only the result of institutional changes but also a response to economic differences between Flanders and Wallonia, as well as to the increasing salience of the language cleavage. Groups were rescaling even before the gradual federalization of the state started, but federalization has accentuated this process.

An isomorphic mapping hypothesis of the grid representation

We introduce a grid cell microcircuit hypothesis. We propose the ‘grid in the world’ (evident in grid cell discharges) is generated by a ‘grid in the cortex’. This cortical grid is formed by patches of calbindin-positive pyramidal neurons in layer 2 of medial entorhinal cortex (MEC). Our isomorphic mapping hypothesis assumes three types of isomorphism: (i) metric correspondence of neural space (the two-dimensional cortical sheet) and the external two-dimensional space within patches; (ii) isomorphism between cellular connectivity matrix and firing field; (iii) isomorphism between single cell and population activity. Each patch is a grid cell lattice arranged in a two-dimensional map of space with a neural : external scale of approximately 1 : 2000 in the dorsal part of rat MEC. The lattice behaves like an excitable medium with neighbouring grid cells exciting each other. Spatial scale is implemented as an intrinsic scaling factor for neural propagation speed. This factor varies along the dorsoventral cortical axis. A connectivity scheme of the grid system is described. Head direction input specifies the direction of activity propagation. We extend the theory to neurons between grid patches and predict a rare discharge pattern (inverted grid cells) and the relative location and proportion of grid cells and spatial band cells.

Lexical typology through similarity semantics: Toward a semantic map of motion verbs

This paper discusses a multidimensional probabilistic semantic map of lexical motion verb stems based on data collected from parallel texts (viz. translations of the Gospel according to Mark) for 100 languages from all continents. The crosslinguistic diversity of lexical semantics in motion verbs is illustrated in detail for the domain of ‘go’, ‘come’, and ‘arrive’ type contexts. It is argued that the theoretical bases underlying probabilistic semantic maps from exemplar data are the isomorphism hypothesis (given any two meanings and their corresponding forms in any particular language, more similar meanings are more likely to be expressed by the same form in any language), similarity s emantics (similarity is more basic than identity), and exemplar semantics (e xemplar meaning is more fundamental than abstract concepts).

Diffusionlessγ⇄αPhase Transition in Polycrystalline and Single-Crystal Cerium

The cerium γ⇄α transition was investigated using high-pressure, high-temperature angle-dispersive x-ray diffraction measurements on both poly- and single-crystalline samples, explicitly addressing symmetry change and transformation paths. The isomorphic hypothesis of the transition is confirmed, with a transition line ending at a solid-solid critical point. The critical exponent is determined, showing a universal behavior that can be pictured as a liquid-gas transition. We further report an isomorphic transition between two single crystals (with more than 14% of volume difference), an unparalleled observation in solid-state matter interpreted in terms of dislocation-induced diffusionless first-order phase transformation.

Heat capacity anomaly in the vicinity of the tricritical and upper critical points

The anomalous behavior of the isochoric heat capacity of a mixture of methane, pentane and heptane is studied experimentally in the vicinity of the liquid-vapor critical point in the cases when (a) the critical temperature T c approaches the tricritical point T TCP and (b) the critical temperature approaches the upper critical end point T U . It is shown that in all cases, the singular part of the heat capacity of the mixture has the form C sing=A¦τ¦−α, where τ=(T − T c )/T c and α≈0.11. When T c →T U , amplitude A of the heat capacity anomaly is found to be approximately constant. At the same time, the amplitude of the anomaly tends to zero in the vicinity of the tricritical point: A∝¦τc¦e, where τc=(T c − T TCP )/T TCP and e=1.6−1.7. The inevitable vanishing of this mode of the heat capacity anomaly leads to a negative value of the critical index $$\tilde \alpha$$ characterizing the heat capacity anomaly at the tricritical point, while the tricritical point theory and the isomorphism hypothesis predict $$\tilde \alpha = 0.5$$ .

Direct experimental verification of the isomorphism hypothesis for critical phenomena

The heat capacity at constant volume of a mixture of methane and 0.0345 mole fractions of heptane is experimentally studied over a wide range of densities and temperatures. In the case when the transition from a three-phase state takes place in the presence of a noncritical liquid phase, it is found that the behavior of the heat capacity in the vicinity of the upper end critical point is fully isomorphic with the behavior of the heat capacity in the vicinity of the liquid-vapor critical point of one-component fluid. It is shown that the measured quantity in this experiment is the heat capacity at constant volume and constant chemical potential μ of the heavy impurity component C v, μ. Thus, it has been confirmed by direct measurements that the anomaly of this heat capacity completely coincides in character with the anomaly of the heat capacity at constant volume in the vicinity of the liquid-vapor critical point of one-component fluids.

Is perception isomorphic with neural activity?

Is perception isomorphic with neural activity?

The classification of double critical points and thermodynamical properties in their vicinities

The double critical points of binary mixtures, liquid crystals and ferroelectrics are investigated. The classification of double critical points is done and thermodynamics in their vicinities is considered. It is shown that the isomorphism hypothesis could be proved for a wide class of intermolecular potentials. A possible symmetry of the systems having double critical points and its consequences are discussed.