Prediction and critical transition mechanism for granite fracture:Insights from critical slowing down theory

Rock fracture warning is one of the significant challenges in rock mechanics.Many true triaxial and synchronous acoustic emission(AE)tests were conducted on granite samples.The investigation focused on the characteristics of AE signals preceding granite fracture,based on the critical slowing down(CSD)theory.The granite undergoes a transition from the stable phase to the fracture phase and exhibits a clear CSD phenomenon,characterized by a pronounced increase in variance and autocorrelation coefficient.The variance mutation points were found to be more identifiable and suitable as the primary criterion for predicting precursor information related to granite fracture,compared to the autocorrelation coefficient.It is noteworthy to emphasize that the CSD factor holds greater potential in elucidating the underlying mechanisms responsible for the critical transition of granite fracture,in comparison to the AE timing parameters.Furthermore,a novel multi-parameter collaborative prediction method for rock fracture was developed by comprehensively analyzing predictive information,including abnormal variation modes and the CSD factor of AE characteristic parameters.This method enhances the understanding and prediction of rock fracture-related geohazards.

Instantaneous Bethe-Salpeter Equation and Its Exact Solution

We present an approach to solve Bethe-Salpeter (BS) equations exactly withoutany approximation if the kernel of the BS equations exactly is instantaneous, and take positroniumas an example to illustrate the general features of the exact solutions. The key step for theapproach is from the BS equations to derive a set of coupled and well-determined integrationequations in linear eigenvalue for the components of the BS wave functions equivalently, which maybe solvable numerically under a controlled accuracy, even though there is no analytic solution. Forpositronium, the exact solutions precisely present corrections to those of the correspondingSchrodinger equation in order υ~1 (υ is the relative velocity) for eigenfunctions, in order υ~2for eigenvalues, and the mixing between S and D components in J~(PC) = 1~(--) states etc.,quantitatively. Moreover, we also point out that there is a questionable step in some existentderivations for the instantaneous BS equations if one is pursuing the exact solutions. Finally, weemphasize that one should take the O(υ) corrections emerging in the exact solutions into accountaccordingly if one is interested in the relativistic corrections for relevant problems to the boundstates.

Electronic Transport and Magnetic Properties in Ferroelectric- Ferromagnetic Composites La5/8Ca3/8MnO3：ErMnO3

The crystal structures and electronic transport properties of composites, xLa5/8Ca3/8MnO3 （1-x）ErMnO3 （x=0, 0.2, 0.4, 0.5, 0.6, 0.8, 1）, where ErMnO3 is the insulating ferroelectric and La5/8Ca3/8MnO3 is the metallic ferromagnetic component, were studied. The magnetization of samples （x=0, 0.5, 1） were also measured as a function of temperature from 4 K to 300 K. The X-ray diffraction data show La5/8Ca3/8MnO3 and ErMnO3 are almost complete immiscible, originating from the significant difference in their crystal structures. All the composites show a metal-insulator transition when the molar fraction of xLa5/8Ca3/8MnO3 component x≥0.4 and the electronic transport behaviors follow the classical percolation theory model very well. Magnetization of the mixture with x=0.5 is unique and enhanced greatly compared with that of pure ErMnO3. Comprehensive analysis of the electronic transport and magnetic results suggests that this material system is a new kind of multiferroic with stronger magnetism in a wider temperature range compared with the single phase multiferroic ErMnO3.

Catastrophic model for stability analysis of high pile-column bridge pier

According to the engineering features of higher pile-column bridge pier in mountainous area, a clamped beam mechanical model was set up by synthetically analyzing the higher pile-column bridge pier buckling mechanism. Based on the catastrophe theory, the cusp catastrophe model of higher pile-column bridge pier was established by the determination of its potential fimction and bifurcation set equation, the necessary instability conditions of high pile-column bridge pier were deduced, and the determination method for column-buckling and lateral displacement of high pile-column bridge pier was derived. The comparison between the experimental and calculated results show that the calculated curves agree with testing curves and the method is reasonable and effective.

Viscoelastic micromechanical model for dynamic modulus prediction of asphalt concrete with interface effects

A viscoelastic micromechanical model is presented to predict the dynamic modulus of asphalt concrete （AC） and investigate the effect of imperfect interface between asphalt mastic and aggregates on the overall viscoelastic characteristics of AC. The linear spring layer model is introduced to simulate the interface imperfection. Based on the effective medium theory, the viscoelastic micromechanical model is developed by two equivalence processes. The present prediction is compared with available experimental data to verify the developed framework. It is found that the proposed model has the capability to predict the dynamic modulus of AC. Interface effect on the dynamic modulus of AC is discussed using the developed model. It is shown that the interfacial bonding strength has a significant influence on the global mechanical performance of AC, and that continued improvement in surface fimctionalization is necessary to realize the full potential of aggregates reinforcement.

Ecological suitability evaluation for urban growth boundary in red soil hilly areas based on fuzzy theory

The fuzziness exists in spatial distribution of geographic data of land suitability evaluation processes,which makes it difficult to quantify land boundaries by using traditional binary logic-based overlay model.Aiming at this limitation,an ecological suitability evaluation analysis model was presented based on fuzzy theory and a research on urban growth boundary(UGB) of the Great-Hexi Leading District(GHLD) of Changsha was conducted.With the support of GIS,RS and MATLAB,slope,elevation,vegetation,soil productivity,soil permeability,water body and land use are selected as the input of model according to the characteristic properties of soil and terrain in red soil hilly areas.The running result of this model indicates that the ratios of highly suitable land,suitable land,moderately suitable land and unsuitable land in GHLD are 18.75%,10.31%,64.16%,6.78%,respectively.This result accords with spatial structure worked out by Space Development Strategy Planning of GHLD,Based on this result,several suggestions are made to guide UGB developments in future.

Leadless pacemakers： a contemporary review

1 Introduction Over one million cardiac pacemakers are implanted every year worldwide,[11 of which approximately 200,000 are implanted in the United States alone.121 Combined with an aging population and increasing pacing indications, these numbers are expected to grow. Since the first pacemaker implantation in 1950s, cardiac pacemaker technology has rapidly advanced. Reduction in generator size, increased battery longevity, quality of pacemaker leads, algorithmic and rate responsive programming-all have revolutionized and transformed the implantation and management of transvenous cardiac pacemaker （TV-PPM）.

Function Theory of a Class of Bounded Reinhardt Domains

In this paper, we consider a class of bounded Reinhardt domains Dα（m, n1,…,nm）. The Bergman kernel function K（z,z^）, the Bergman metric matrix T（z,z^）, the Cauchy-Szegoe kernel function S（z,ζ^） are obtained. Then we prove that the formal Poisson kernel function is not a Poisson kernel function. At last, we prove that Dα is a quasiconvex domain and Dα is a stronger quasiconvex domain if and only if Dα is a hypersphere.

Appraisal Research： A Model of Critical Reading

Reading is a process of negotiation and interaction between readers and writers. Critical Reading of a text is achieved chiefly by figuring out the attitudes, viewpoints, and ideology of the writer, also termed as evaluative resources in Appraisal Theory. This paper carries out an appraisal research into a reading passage taken from TEM-8 paper in hope of helping English majors to cultivate their Critical Reading ability by offering them a practical and implementable reading model.

Boundary conditions: An effect of average of microscopic Maxwell’s equations

It is well known that the macroscopic Maxwell’s equations can be obtained from the corresponding microscopic or atomic equations by a proper averaging process. The purpose of this paper is to present the macroscopic Maxwell’s equations which are valid in all regions of space, including an interface between two different media; and the boundary conditions can naturally emerge from the macroscopic equations as an effect of average of the microscopic Maxwell’s equations. In addition, the application of the unit step functions and the Dirac delta function to our discussion not only permits great mathematical simplicity but also gives rise to convenient physical concepts for the description and representation of the actual fields in the vicinity of the interface.

Acknowledgments to reviewers of World Journal of Gastroenterology

Many reviewers have contributed their expertise and time to the peer review,a critrical process to ensure the quality of World Journal of Gastroenterology.The editors and authors of the articles submitted to the journal are grateful to the following reviewers for evaluating the articles （including those published in this issue and those rejected for this issue）during the last editing time period.

Poetic Religiosity in Brazilian Urban Peripheries

Starting from the observation of a greater religious pluralism of the Brazilian society, we ask ourselves, in the f＇trst instance, if it is a movement does not present itself as a paradigmatic change. That is, if as beliefs underlying social relations in a binary world of identity exclusions would not be in a process of weakening, allowing us to perceive new ways of latent arrangements. In a second instance, after recognizing that plurality requires recognition of the freedoms of belief and expression, we question the limits of such freedom point to a cosmopolitan ethics. For that matter, we take as reference in the non-religions in the Brazilian urban peripheries.

First Principles Study of Half-metallic Properties at MnSb/GaSb（001） Interface

Density functional theory calculations are performed to study the structural, electronic and magnetic properties of hexagonal NiAs type and cubic zinc blende type MnSb structure and interface of zinc blende MnSb with GaSb（001）. We used generalized gradiant approximation to calculate the exchange-correlation term in bulk and interface determination. The zinc blende structure of MnSb is found to be ferromagnetic half-metal with a total moment of 4 μB per formula unit. Results show that the half-metallicity character is preserved at MnSb/GaSb（001） interface. The magnetic moment of Mn atom in interface is reduced and the magnetic moment of the interface Sb atom is equal to the average of the corresponding bulk values in two sides of the interface. The band alignment properties are also computed and a rather large minority valance band offset of about 1.25 eV is obtained in this heterojunction.

Acknowledgments to reviewers of World Journal of Gastroenterology

Many reviewers have contributed their expertise and time to the peer review,a critical process to ensure the quality of World Journal of Gastroenterology.The editors and authors of the articles submitted to the journal are gratful to the following reviewers for evaluating the articles（including those published in this issue and those rejected for this issue）during the last editing time period.

Acknowledgments to reviewers of World Journal of Gastroenterology

Many reviewers have contributed their expertise and time to the peer review,a critical process to ensure the quality of World Journal of Gastroenterology.The editors and authors of the articles submitted to the journal are grateful to the following reviewers for evaluating the articles（including those published in this issue and those rejected for this issue）during the last editing time period.

Free dendritic growth model based on nonisothermal interface and microscopic solvability theory

Considering both the effect of nonisothermal nature of the solid/liquid interface and the microscopic solvability theory (MicST), a further improved version of free dendritic growth model for pure materials was proposed. Model comparison indicates that there is a higher temperature at the tip of dendrite predicted by the present model compared with the corresponding model with the isothermal solid/liquid interface assumption. This is attributed to the sidewise thermal diffusion, i.e. the gradient of temperature along the nonisothermal interface. Furthermore, it is indicated that the distinction between the stability criteria from MicST and marginal stability theory (MarST) is more significant with the increase of bath undercoolings. Model test also indicates that the present model can give an agreement with the available experimental data. It is finally concluded that the nonisothermal nature of the solid/liquid interface and the stability criterion from MicST should be taken into account in modeling free dendritic growth.

Acknowledgments to reviewers of World Journal of Gastroenterology

Many reviewers have contributed their expertise and the peer review, a critical process to ensure the quality of World Journal of Gastroenterology,The editors and authors of the articles submitted to the journal are grateful to the following reviewers for evaluating the articles （including those published in this issue and those rejected for this issue） during the last editing time perjod.

Acknowledgments to reviewers of World Journal of Gastroenterology

Many reviewers have contributed their expertise and time to the peer review,a critical process to ensure the quality of World Journal of Gastroenterology.The editors and authors of the articles submitted to the journal are grateful to the following reviewers for evaluation the articles（including those published in this issue and those rejected for this issue）during the last editing time period.

Acknowledgments to reviewers of World Journal of Gastroenterology

Many reviewers have contributed their expertise and time to the peer review,a critical process to ensure the quality of World Journal of Gastroenterology.

Human Rights and Jainism A Comparative Study

My research paper tries to investigate certain pertinent questions which are very important for the solution of today＇s problems which we are facing in a globalised world. They are as follows： （1） By following Jain principles, how one can promote and preserve rights of the individual; （2） In what ways Jain teachings prescribed preventive measures against the violation of human rights; （3） Chronology of Indian political thought and Comparison between Jain and Gandhian human rights. Today, we are facing the problems of infringement, misuse of rights in all walks of our life. We are confronting with the problems of social, economic, and political rights, discrimination between men and women in third world countries. Inequality is rampant. To establish equality-protection, promotion, and preservation of human rights is utmost important need of the day. It is one of ways that by following Jain teachings and principles we can be able to establish equality of rights and peace in the contemporary world. So my research paper will be aptly related with the Congress main theme, the politics in the world of inequality. My paper is an interpretative study which is viewed from the socio-political dimension not from the religious or metaphysical point of view.