Types Of Transitions Research Articles

Residential preferences, place alienation, and neighborhood satisfaction: A conjoint survey experiment in Toronto’s inner suburbs

ABSTRACT In this article, we study neighborhood preferences among residents of highly diverse, lower income suburban neighborhoods in Toronto, Ontario. By extending the typical application of conjoint designs to the urban domain, we show techniques for measuring place alienation—a sense of disconnection from place—and its impact on neighborhood satisfaction. We find that residents in lower SES neighborhoods share many of the same priorities as residents in higher SES neighborhoods when it comes to safety, transit, school quality, neighborliness, public spaces, and building types. However, differences appear across a range of preferences including bike usage, local commercial spaces, and cultural and recreation facilities. When considering place alienation and neighborhood satisfaction, we find a consistent, robust inverted relationship—as place alienation decreases, neighborhood satisfaction increases. Moreover, this relationship is not mitigated by socioeconomic factors, neighborhood conditions, or even attitudinal and experiential factors. We end with suggestions for future research.

Dynamic Bufurcation of a Tri-molecular Autocatalytic Reaction-diffusion System

The tri-molecular autocatalytic reaction-diffusion system is a class of model, which can reveal a variety of phenomena observed in areas of encompassing physics, biology, ecology, chemistry and many other fields. In this paper, the tri-molecular autocatalytic reaction-diffusion system with Neumann boundary condition is studied. First, We have reached the following conclusion: the equilibrium of the system loses stability if the parameter is greater than a fixed value, and the corresponding principle of exchange stability condition is then verified. Second, we obtained the local asymptotic stability of trivial, transition types, expressions of bifurcated solutions, the main tools are center manifold theory. The theory is used to reduce the infinite dynamical system to a finite dimensional. Finally, the necessary explanations for the theory is provided.

Monte Carlo simulation with Wolff algorithm for scaling behavior of two dimensional XY model with KT phase transition

The property of XY model with its KT phase transition has been discussed in many aspects such as specific heat and magnetic susceptibility along with correlation function. Also, this is one of the original models for topological phase transition which gives a new type of phase transition without symmetry breaking. Since the calculation of these properties above can be achieved by Monte Carlo Method with Wolff algorithm, the visualization of vortex and antivortex is also an interesting task which is accomplished in this article. By successfully modeling the system and getting the step-by-step configuration, the relation between the generation of vortex and the variation of temperature can be concluded in a qualitative way. The calculation of spin correlation function shows the phase transition between disorder and quasi long-range order which represents the topological phase transition. As a reliable method, the Monte Carlo method with Wolff algorithm can be a choice of generating the training set for neural network which can calculated much more sophisticated case in a relatively short time and the transition between classical simulation and quantum simulation can be approached as mentioned in the end of this article.

Defining methods for architectural and planning organization of temporary settlements for internally displaced persons in Ukraine

This article analyzes the main issues of architectural and planning organization of temporary settlements for internally displaced persons. It identifies the current demands for increased flexibility and resilience in planning and explores a new type of temporary housing with a progressive (permanent) core. Special attention is given to incremental design and participation as methods of uniting the efforts of designers, communities, and governments into a single strategy for providing sustainable housing for affected populations. A review of the research revealed two main problems in the strategic planning of housing assistance: the issue of stability in the concept of "temporary housing" and the challenge of flexible planning solutions. In response to this, the introduction of new transitional types - "transitional shelters" designed using materials and structures that can be upgraded or reused in more permanent housing units, and "progressive shelters" - stationary, rapidly deployable shelters on designated land (with appropriate zoning) intended for future conversion into permanent housing units. In a methodological sense, both types feature a permanent, stable core and temporary residential volumes or structures that gradually evolve into a permanent living environment—a concept known as incremental architecture. It changes the morphological understanding of temporary housing, allowing it to be engaged at all stages of housing assistance alongside participatory methods and "advocacy planning" that regulate the involvement of communities and affected populations in planning activities together with specialists and local authorities. The experience of rebuilding the affected city of Constitution in Chile has shown that these methods can enhance the flexible nature of architecture (its planning possibilities and solutions for reuse and reconfiguration) and potentially create new values of permanence. Additionally, a review of the existing Ukrainian experience has revealed a lack of tools for uniting the efforts of designers, communities, and the government into a single strategy for temporary housing policy, thus preventing temporary shelter and housing facilities from meeting all the necessary (social, cultural, and infrastructural) needs of residents. This implies that a polyvalent strategy may be recommended for affected rural communities, simultaneously satisfying the needs of permanent residents and providing affected communities with temporary homes with the potential for permanent residency, as it is impossible to accurately assess the terms of temporary housing use and population repatriation until the end of hostilities.

From stationary to directional transition: a case study in Doñana

ContextDoñana’s landscape is a mosaic of different types of transitions at different spatial and temporal scales. Among them, stationary transitions are relatively stable over time, while directional transitions involve the unidirectional movement of boundaries. The fiftieth anniversary of the Doñana National Park (SW Spain) provided a framework to test the transformation of a biotic transition from stationary to directional.ObjectivesThis study aimed to examine landscape changes along a stationary groundwater-dependent transition, the processes responsible for them, and the consequences for the biotic transition.MethodsThrough detailed photointerpretation, nine land use/land cover categories were mapped at four dates (1971, 1984, 2002, 2019) on a ca. 2 square km plot, and then changes analysed at three levels (interval, category, and transition) using Intensity Analysis. Potential causes including precipitation, groundwater levels, local management and changes in the surroundings were examined to understand the changes.ResultsJuniper woodland, spontaneous pines and mixed shrub categories showed the greatest gains and were most active. In the third interval (2002–19) largest transitions from pond-grassland to several terrestrial categories and the dead of heathlands indicate the encroachment of xeric communities into hygrophytic ones. Observed changes seem to be due to succession, forestry management and extrinsic drivers such groundwater overexploitation in the surroundings of the protected area.ConclusionsThe long-term study of this stationary transition shows the weakening of the factors that controlled its establishment, the loss of its constituent habitats due to groundwater withdrawal, and its conversion into a directional transition.

Investigation of γ‐irradiation dependent structural properties of LLM‐105 by ultraviolet‐visible diffuse reflectance spectroscopy

AbstractIn this work, different doses of γ‐irradiation were applied to 2,6‐diamino‐3,5‐dinitropyrazine‐1‐oxide (LLM‐105) to examine the way in which their optical properties and electronic structure can be affected. The UV absorption spectrum of LLM‐105 was calculated based on the time‐dependent density functional theory (TD‐DFT). The analyses of hole‐electron distribution and charge‐transfer spectra (CTS) revealed the type of electronic transitions and elucidated the nature of each excited state in the LLM‐105 molecule. For the pristine LLM‐105, the band gap (Eg) value of 2.76 eV was obtained using the Kubelka‐Munk model. Moreover, the band gap of LLM‐105 increased with the irradiation dose. The increase in relevant UV‐Vis absorption peak intensity, implying the increase in band gap is due to the formation of a larger conjugated structure in LLM‐105 under γ‐irradiation.

Thermoresponsive Smart Copolymer Coatings Based on P(NIPAM-co-HEMA) and P(OEGMA-co-HEMA) Brushes for Regenerative Medicine.

The fabrication of multifunctional, thermoresponsive platforms for regenerative medicine based on polymers that can be easily functionalized is one of the most important challenges in modern biomaterials science. In this study, we utilized atom transfer radical polymerization (ATRP) to produce two series of novel smart copolymer brush coatings. These coatings were based on copolymerizing 2-hydroxyethyl methacrylate (HEMA) with either oligo(ethylene glycol) methyl ether methacrylate (OEGMA) or N-isopropylacrylamide (NIPAM). The chemical compositions of the resulting brush coatings, namely, poly(oligo(ethylene glycol) methyl ether methacrylate-co-2-hydroxyethyl methacrylate) (P(OEGMA-co-HEMA)) and poly(N-isopropylacrylamide-co-2-hydroxyethyl methacrylate) (P(NIPAM-co-HEMA)), were predicted using reactive ratios of the monomers. These predictions were then verified using time-of-flight-secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS). The thermoresponsiveness of the coatings was examined through water contact angle (CA) measurements at different temperatures, revealing a transition driven by lower critical solution temperature (LCST) or upper critical solution temperature (UCST) or a vanishing transition. The type of transition observed depended on the chemical composition of the coatings. Furthermore, it was demonstrated that the transition temperature of the coatings could be easily adjusted by modifying their composition. The topography of the coatings was characterized using atomic force microscopy (AFM). To assess the biocompatibility of the coatings, dermal fibroblast cultures were employed, and the results indicated that none of the coatings exhibited cytotoxicity. However, the shape and arrangement of the cells were significantly influenced by the chemical structure of the coating. Additionally, the viability of the cells was correlated with the wettability and roughness of the coatings, which determined the initial adhesion of the cells. Lastly, the temperature-induced changes in the properties of the fabricated copolymer coatings effectively controlled cell morphology, adhesion, and spontaneous detachment in a noninvasive, enzyme-free manner that was confirmed using optical microscopy.

Synthesis and Characterization of Bipyridyl-(Imidazole)n Mn(II) Compounds and Their Evaluation as Potential Precatalysts for Water Oxidation.

Metalloenzymes make extensive use of manganese centers for oxidative catalysis, including water oxidation; the need to develop improved synthetic catalysts for these processes has long motivated the development of bioinspired manganese complexes. Herein, we report a series of bpy-(imidazole)n (n = 1 or 2) (bpy = 2,2'-bipyridyl) ligands and their Mn2+ complexes. Four Mn2+ complexes are structurally characterized using single-crystal X-ray diffraction, revealing different tridentate and tetradentate ligand coordination modes. Cyclic voltammetry of the complexes is consistent with ligand-centered reductions and metal-centered oxidations, and UV-vis spectroscopy complemented by TD-DFT calculations shows primarily ligand-centered transitions with minor contributions from charge-transfer type transitions at higher energies. In solution, ESI-MS studies provide evidence for ligand reorganization, suggesting complex speciation behavior. The oxidation of the complexes in the presence of water is probed using cyclic voltammetry, but the low stability of the complexes in aqueous solution leads to decomposition and precludes their ultimate application as aqueous electrocatalysts. Possible reasons for the low stability and suggestions for improvement are discussed.

A Scoping Survey on Cross-reality Systems

Immersive technologies such as Virtual Reality (VR) and Augmented Reality (AR) empower users to experience digital realities. Known as distinct technology classes, the lines between them are becoming increasingly blurry with recent technological advancements. New systems enable users to interact across technology classes or transition between them—referred to as cross-reality systems . Nevertheless, these systems are not well understood. Hence, in this article, we conducted a scoping literature review to classify and analyze cross-reality systems proposed in previous work. First, we define these systems by distinguishing three different types. Thereafter, we compile a literature corpus of 306 relevant publications, analyze the proposed systems, and present a comprehensive classification, including research topics, involved environments, and transition types. Based on the gathered literature, we extract nine guiding principles that can inform the development of cross-reality systems. We conclude with research challenges and opportunities.

The correctness of concurrencies in (reversible) concurrent calculi

This article designs a general principle to check the correctness of the definition of concurrency (a.k.a. independence) of events for concurrent calculi. Concurrency relations are central in process algebras, but also two-sided: they are often defined independently on composable and on coinitial transitions, and no criteria exist to assess whether they “interact correctly”. This article starts by examining how reversibility can provide such a correctness of concurrencies criterion, and its implications. It then defines, for the first time, a syntactical definition of concurrency for CCSK, a reversible declension of the calculus of communicating systems. To do so, according to our criterion, requires to define concurrency relations for all types of transitions along two axes: direction (forward or backward) and concomitance (coinitial or composable). Our definition is uniform thanks to proved transition systems and satisfies our sanity checks: square properties, sideways diamonds, but also the reversible checks (reverse diamonds and causal consistency). We also prove that our formalism is either equivalent to or a refinement of pre-existing definitions of concurrency for reversible systems. We conclude by discussing additional criteria and possible future works.

Designing networks with specific synchronization transitions independent of the system’s dynamics

Synchronization transition, a phenomenon widely observed in various networks, can be classified into two types: explosive and continuous transitions. While the continuous transition is relatively well-understood, the underlying mechanisms of the explosive transition present a challenge to researchers. Most studies, however, pointed out the interaction between node dynamics and network topology as the fundamental feature of explosive synchronization in networks. In this study, we demonstrate the impact of Laplacian eigenvalue on the type of synchronization transition observed in complex systems. Through simulations, our results show that the sparsity of the Laplacian eigenvalues is the key to designing the synchronization transitions. The findings reveal that the sparse distributions lead to a jump in the evolution of the order parameter, explosive synchronization. Additionally, the nodes exhibit continuous synchronization in cases where the eigenvalues are broadly dispersed. This study examines three distinct chaotic systems – Chen, Rössler, and Lorenz – with five different Laplacian eigenvalue distributions. Surprisingly, the outcomes demonstrate that the synchronization transition is not mainly dependent on the internal dynamics of the nodes, highlighting a pivotal characteristic that can be used to design the precise control of complex networks.

Effect of Chain Length on Swelling Transitions of Brodie Graphite Oxide in Liquid 1‐Alcohols

AbstractSwelling is the most fundamental property of graphite oxides (GO). Here, a structural study of Brodie graphite oxide (BGO) swelling in a set of long chain 1‐alcohols (named C11 to C22 according to the number of carbons) performed using synchrotron radiation X‐ray diffraction at elevated temperatures is reported. Even the longest of tested alcohols (C22) is found to intercalate BGO with enormous expansion of the interlayer distance from ≈6Å up to ≈63Å, the highest expansion of GO lattice ever reported. Swelling transitions from low temperature α‐phase to high temperature β‐phase are found for BGO in all alcohols in the C11–C22 set. The transitions correspond to decrease of inter‐layer distance correlating with the length of alcohol molecules, and change in their orientation from perpendicular to GO planes to layered parallel to GO (Type II transitions). These transitions are very different compared to BGO swelling transitions (Type I) found in smaller alcohols and related to insertion/de‐insertion of additional layer of alcohol parallel to GO. Analysis of general trends in the whole set of 1‐alcohols (C1 to C22) shows that the 1‐alcohol chain length defines the type of swelling transition with Type I found for alcohols with C<10 and Type II for C>10.

Thermoreversible Gelation with Supramolecularly Polymerized Cross-Link Junctions.

Structure and reversibility of cross-link junctions play pivotal roles in determining the nature of thermoreversible gelation and dynamic mechanical properties of the produced polymer networks. We attempt to theoretically explore new types of sol-gel transitions with mechanical sharpness by allowing cross-links to grow without upper bound. We consider thermoreversible gelation of the primary molecules R{Af} carrying the number f of low molecular weight functional groups (gelators) A. Gelators A are assumed to form supramolecular assemblies. Some examples are: telechelic polymers (f=2) carrying π-π stacking benzene derivatives at their both ends, and trifunctional star molecules (f=3) bearing multiple hydrogen-bonding gelators. The sol-gel transition of the primary molecules becomes sharper with the cooperativity parameter of the stepwise linear growth of the cross-links. There is a polymerization transition (crossover without singularity) of the junctions in the postgel region after the gel point is passed. If the gelator A tends to form supramolecular rings competitively with linear chains, there is another phase transition in the deep postgel region where the average molecular weight of the rings becomes infinite (Bose-Einstein condensation of rings). As a typical example of binary cross-links where gelators A and B form mixed junctions, we specifically consider metal-coordinated binding of ligands A by metal ions B. Two types of multi-nuclear supramolecular complexes are studied: (i) linear stacking (ladder) of the sandwich A2B units, and (ii) linear train of egg-box A4B units. To find the strategy towards experimental realization of supramolecular cross-links, the average molecular weight, the gel fraction, the average length of the cross-link junctions are numerically calculated for all of these models as functions of the functionality f, the concentration of the solute molecules, and the temperature. Potential candidates for the realization of these new types of thermoreversible gelation are discussed.

Colossal magneto-nonlinear-dielectric effect in magnetoelectric antiferromagnet tetracobalt diniobate

The magnetic field effect on nonlinear dielectric susceptibilities of magnetoelectric antiferromagnet tetracobalt diniobate (Co4Nb2O9) around Néel temperature (TN) is studied. Under a magnetic field of H = 5 T, the real part of second order nonlinear dielectric susceptibility χ'2 shows a valley at TN, whereas those of linear and third order nonlinear dielectric susceptibilities (χ'1 and χ'3) show peaks. The magnetic field has much more colossal effects on χ'2 and χ'3 than on χ'1. The fact that χ'3 keeps positive around TN under H = 5 T suggest discontinuousness of the magnetic field induced ferroelectric transition, but absence of thermal hysteresis on heat capacity indicates continuousness of transition. The reason why nonlinear dielectric spectra fail to identify the type of ferroelectric transition can be explained by the deviation of critical exponent β from the value for the Landau universality class.

Magneto-Optical Sensing of the Pressure Driven Magnetic Ground States in Bulk CrSBr.

Competition between exchange interactions and magnetocrystalline anisotropy may bring new magnetic states that are of great current interest. An applied hydrostatic pressure can further be used to tune their balance. In this work, we investigate the magnetization process of a biaxial antiferromagnet in an external magnetic field applied along the easy axis. We find that the single metamagnetic transition of the Ising type observed in this material under ambient pressure transforms under hydrostatic pressure into two transitions, a first-order spin-flop transition followed by a second-order transition toward a polarized ferromagnetic state near saturation. This reversible tuning into a new magnetic phase is obtained in layered bulk CrSBr at low temperature by varying the interlayer distance using high hydrostatic pressure, which efficiently acts on the interlayer magnetic exchange and is probed by magneto-optical spectroscopy.

Mechanistic research on the complex motion response of a TLP in a tender-assisted drilling state

In this study, nonlinear motion characteristics have been studied in the coupled behavior of a Tension Leg Platform (TLP) combined with a Tender-assisted Drilling Unit (TADU). A time-domain numerical model has been established that accounts for the nonlinear behavior of mooring systems and hydrodynamic interference. Experiments are performed to verify the numerical model. Nonlinear motion characteristics of the steady-state response of the time-domain results are analyzed using Poincaré mapping and fast Fourier transform. The focus of this study is on investigating the motion response of the TLP platform in three degrees of freedom under coupled states. The surge motion is found to mainly consist of the wave frequency component and the half-wave frequency subharmonic component, while the wave-frequency, subharmonic, and super harmonic vibration components are observed in both heave and pitch motions. Three types of nonlinear regimes, namely chaos, transition, and multiple periodic, are identified in the heave and pitch motions under different wave conditions.

Thermodynamics, Ruppeiner geometry, and topology of Born-Infeld black hole in asymptotic flat spacetime

In the extended phase space, Born-Infeld anti-de Sitter black holes exhibit diverse phase transitions including the van der Waals type and reentrant phase transitions. In this paper, we aim to investigate the potential thermodynamical features for Born-Infeld black holes when the cosmological constant vanishes. Quite differently, although there present the swallow tail behavior of the free energy and temperature-entropy criticality, no phase transition will occur when we consider the thermodynamical stability. Further, based on these findings, the phase structures are explicitly shown with the stable, unstable black hole, and non-black hole regions. After excluding the non-black hole region, we observe that the scalar curvature of the Ruppeiner geometry is always positive, indicating a dominant repulsive interaction for both the stable and unstable black holes. Particularly, we also establish the topology for the thermodynamical critical point. By calculating the topological number, we confirm that this critical point of the Born-Infeld black holes is a conventional one. Although it is not an indicator of the first small-large black hole phase transition, it does signify the emergence of stable intermediate black holes. All these results uncover the thermodynamical features of the Born-Infeld black holes in the absence of the cosmological constant.

The impact of productivity on export transitions: revisited evidence from the Vietnamese manufacturing sectors

The effect of total factor productivity (TFP) on exports particularly interests policy-makers and economists, but empirical evidence is ambiguous. This paper uses the 6-wave panel data in 2010-2015 to investigate the impact of TFP on export transitions at the firm level. We distinguish different types of export transitions, namely start, stop, continuity, fluctuation, and striving, and different phases of export transition. The Generalised Method of Moments (GMM) estimation is applied to control for endogeneity and unobserved time-invariant specific components. The results reveal that (i) the effect of productivity on export (the self-selection hypothesis) is heterogeneous, depending on specific sectors and types and phases of export transitions; (ii) productivity growth does not necessarily result in positive effects on and lead to participation in types and phases of export transitions. Our results also reveal strong evidence of favourable sunk cost in long-run export striving in nearly all sectors, and unlike previous studies, empirical results show a negative effect of sunk cost in some manufacturing sectors. Policy-makers should create dynamic comparative advantages and favourable environments for new exporters, focus the relevant policies on productivity stimulus, and strengthen the likelihood of survival for the domestic firms in the competitive global markets.

Risk for referral to the child welfare system following parental relationship transitions in Norway

BackgroundThere is a lack of knowledge concerning how changes in family structures are associated with involvement in child welfare systems. Particularly little attention has been paid to the role of parental relationship transitions, which may involve major changes in the lives of children and parents in terms of housing, finances, and relationship boundaries between family members. ObjectiveTo investigate how transitions in parental relationship status are linked to referrals to the child welfare system. Participants and settingAll children born in Norway in 1995 (N = 60,218) and 2005 (N = 56,644) and their parents. MethodsThis retrospective birth cohort study consisted of child welfare statistics merged with various registers from Statistics Norway. Logistic panel-data models were used to examine the relationship between the occurrence of a parental relationship transition and referral to the child welfare system. Four types of relationship transitions were analyzed: (1) couple to a single mother, (2) couple to a single father, (3) single mother to a couple, and (4) single father to a couple. ResultsThe occurrence of any type of relationship transition increased the likelihood of referral to the child welfare system in the year that the transition occurred, with the transitions to single motherhood, to single fatherhood, and from single fatherhood to a couple associated with greater odds of referral than the transition from single motherhood to a couple. ConclusionsUnderstanding how parental relationship transitions are associated with referrals to the child welfare system is important to appropriately facilitate help to families in need.

The type of forest edge shapes snail assemblages at forest–pasture transitions

Semi-natural, nutrient-poor calcareous grasslands are local biodiversity hotspots that are increasingly threatened by land use intensification, abandonment, or indirect effects from adjacent habitats. The habitat quality of these grasslands is often influenced by neighbouring forests or intensively managed agricultural land. For example, shrubs encroaching on grassland reduce the sensitive habitat, but at the same time represent a new habitat type (transition zone at gradual forest edge). We investigated the effects of gradual and abrupt forest edges on the species richness, abundance, species composition, functional diversity and number of species of conservation importance (red-listed species) of land snail assemblages at forest–pasture transitions in the Jura Mountains, Switzerland. Forest edge type influenced the snail assemblages in different ways. Transition zones at abrupt forest edges had a higher species richness and more snail individuals than transition zones at gradual forest edges. Transition zones also differed in land snail species composition. At gradual forest edges, the transition zones contained some openland snail species, while those at abrupt forest edges had a similar species composition to the forest interior. Functional diversity was significantly higher for snails in the forests and transition zones at both abrupt and gradual edges than in pastures. In contrast, pastures and transition zones at both abrupt and gradual edges had a significantly higher number of red-listed snail species. Based on our findings, we recommend the creation of gradual forest edges through regular forest management practices, rather than through shrub encroachment into pasture, which could reduce the size of the threatened habitat.