Stable Objects Research Articles

A two-level fusion for building irregularity detection in post-disaster VHR oblique images

A post-disaster scene is more complicated than a vertical pre-disaster one, since it includes debris-covered areas and the imagery angle may be oblique. Detecting buildings and their irregularities in post-disaster oblique images is a valuable resource in many remote sensing applications, such as building damage assessment, which is a critical and challenging task in the disaster management cycle. We proposed a two-level fusion method, which is fast enough to support save and rescue missions. Firstly, an edge-based knowledge-based approach is designed to extract the vertical building map from temporal pre-disaster data. This approach utilizes Gray-Level Co-Occurrence Matrix (GLCM) features and shadow information. The temporal analysis helps the procedure to find stable objects by reducing the effect of noise in fine-resolution data. The mentioned two-level fusion includes data and decision levels. Spectral and georeferenced bands of pre- and post-disaster samples are fused in the data level. The decision-level refers to fusing the results of two classifiers, Spectral-only and Geo-Spectral classifiers. The locality of the method is preserved by the georeferenced feature. The proposed method is implemented on the Google Earth Engine (GEE) platform, and the evaluation is based on Hurricane Nate (2017) and Hurricane Harvey (2017) oblique images. The proposed method shows a significant reduction in the false-positive error, and provides a high performance in detecting irregularity in facade and rooftop areas.

Нейросетевая реализация регулятора для устойчивого объекта

Нейросетевая реализация регулятора для устойчивого объекта

Complexity Level of People Gathering Presentation on an Animated Map—Objective Effectiveness Versus Expert Opinion

The aim of the following study was to present three alternative methods of visualization on animated maps illustrating the movement of people gathered at an open-air event recorded on photographs taken by a drone. The effectiveness of an orthorectified low-level aerial image (a so-called orthophoto), a dot distribution map, and a buffer map was tested in an experiment featuring experts, and key significance was attached to the juxtaposition of objective responses with subjective opinions. The results of the study enabled its authors to draw conclusions regarding the importance of visualizing topographic references (stable objects) and people (mobile objects) and the usefulness of the particular elements of animated maps for their analysis and interpretation.

One-dimensional localized modes of spin-orbit-coupled Bose-Einstein condensates with spatially periodic modulated atom-atom interactions: Nonlinear lattices

Bose-Einstein condensates (BECs) provide a clear and controllable platform to study diverse intriguing emergent nonlinear effects that appear too in other physical settings, such as bright and dark solitons in mean-field theory as well as many-body physics. Various ways have been elaborated to stabilize bright solitons in BECs, three promising schemes among which are: optical lattices formed by counterpropagating laser beams, nonlinear managements mediated by Feshbach resonance, spin-orbit coupling engineered by dressing atomic spin states (hyperfine states of spinor atomic BECs) with laser beams. By combing the latter two schemes, we discover, from theory to calculations, that the two-component BECs with a spin-orbit coupling and cubic atom-atom interactions, whose nonlinear distributions exhibit a well-defined spatially periodic modulation (nonlinear lattice), can support one-dimensional localized modes of two kinds: fundamental solitons (with a single peak), and soliton pairs comprised of dipole solitons (anti-phase) or two-peak solitons (in-phase). The influence of three physical parameters: chemical potential of the system, strengths of both the Rashba spin-orbit coupling and atom-atom interactions, on the existence and stability of the localized modes is investigated based on linear-stability analysis and direct perturbed simulations. In particular, we demonstrate that the localized modes can be stable objects provided always that both the inter- and intraspecies interactions are attractive.

Birational geometry of moduli spaces of stable objects on Enriques surfaces

Using wall-crossing for K3 surfaces, we establish birational equivalence of moduli spaces of stable objects on generic Enriques surfaces for different stability conditions. As an application, we prove in the case of a Mukai vector of odd rank that they are birational to Hilbert schemes. The argument makes use of a new Chow-theoretic result, showing that moduli spaces on an Enriques surface give rise to constant cycle subvarieties of the moduli spaces of the covering K3.

Generative Critique in Interdisciplinary Collaborations: From Critique in and of the Neurosciences to Socio-Technical Integration Research as a Practice of Critique in R(R)I

Discourses on Responsible Innovation and Responsible Research and Innovation, in short R(R)I, have revolved around but not elaborated on the notion of critique. In this article, generative critique is introduced to R(R)I as a practice that sits in-between adversarial armchair critique and co-opted, uncritical service. How to position oneself and be positioned on this spectrum has puzzled humanities scholars and social scientists who engage in interdisciplinary collaborations with scientists, engineers, and other professionals. Recently, generative critique has been presented as a solution to the puzzle in interdisciplinary collaborations on neuroscientific experiments. Generative critique seeks to create connections across disciplines that help remake seemingly stable objects in moments when taken-for-granted ways of seeing and approaching objects are unsettled. In order to translate generative critique from the neurosciences to R(R)I, socio-technical integration research (STIR) is proposed as a practice of generative critique in interdisciplinary R(R)I collaborations. These collaborations aim to account for societal aspects in research and technology development. For this purpose, a variety of approaches have been developed, including STIR and video-reflexive ethnography (VRE). STIR and VRE resemble each other but diverge on affective, collaborative, and temporal dimensions. Their juxtaposition serves to develop suggestions for how STIR could be modified on these dimensions to better enact generative critique in interdisciplinary R(R)I collaborations. In this way, the article contributes to ongoing discussions in R(R)I and in the engaged programme in science and technology studies more broadly on the dynamics of positioning in collaborative work.

Object Tracking System using Iot

Generally every person might have the habit of forgetting their things where they kept or losing their things like vehicles, car keys, house keys or some valuable things. If our mobile is lost we can track it using our Google account but we cannot track any other object in the similar way. This problem is very common when we loose our things we may face difficulty in finding them. Instead of finding them we replace them with new ones sometimes our data will be lost which we cannot retrieve back. So in our project we can track our lost objects by implementing IoT. We can implement this using Bluetooth but there are few limitations which can be resolved using IoT. The different components generally used are GPS we can get the location of the object that we want to track but if the signal is transmitted using GPS our communication devices cannot receive them directly. So we use GSM module which will transfer those signals to the communication devices. The main purpose of our project is it gives the location of the object and traces it. This will help us to track any stable object or moving objects like vehicles, keys, trucks etc. This device will send the location co-ordinates to the user or person who is tracking the object. This device can use by the transport service companies and every person in their daily life. It also keeps on updating the travel status of the object as the object moves on and processes the queries of the owner in tracking the object.

Search for Magnetic Monopoles and Stable High-Electric-Charge Objects in 13Tev Proton-Proton Collisions with the ATLAS Detector.

A search for magnetic monopoles and high-electric-charge objects is presented using 34.4 fb^{-1} of 13TeV pp collision data collected by the ATLAS detector at the LHC during 2015 and 2016. The considered signature is based upon high ionization in the transition radiation tracker of the inner detector associated with a pencil-shape energy deposit in the electromagnetic calorimeter. The data were collected by a dedicated trigger based on the tracker high-threshold hit capability. The results are interpreted in models of Drell-Yan pair production of stable particles with two spin hypotheses (0 and 1/2) and masses ranging from 200 to 4000GeV. The search improves by approximately a factor of 5 the constraints on the direct production of magnetic monopoles carrying one or two Dirac magnetic charges and stable objects with electric charge in the range 20≤|z|≤60 and extends the charge range to 60<|z|≤100.

A Generative Entanglement: Word and Image in Roman Catholic Devotional Practice

Devotional piety broadly depends on events that are not accessible for direct observation and commonly offer very little, if anything, in the way of historical documentation. Sometimes the experiences to which devotion is directed in the veneration of saints is based on visionary experience for which reports are contradictory. This essay explores ways in which word and image are brought together to anchor evanescent or ephemeral, or entirely uncertain, origins and provide devotion with stable objects. I develop the view that word and image are generatively entangled, meaning that their ambiguous connections with one another are able to produce a medium in which devotion finds a footing. The discussion focuses on two case studies: Our Lady of Fátima and Saint Jude. Fátima is based on a series of apparitions to young children in 1917 and Jude is a historically shadowy figure whose cult underwent a modern revival, in part assisted by new iconographic developments that allowed devotees to link their saint to very old traditions. Lore and imagery work together as forms of saying and seeing that bring elusive origins into focus.

Mass-radius ratio bound for horizonless charged compact object in higher dimensions

In this paper, the mass-radius ratio bound for horizonless compact object in higher dimensions is derived. Instead of considering the various matter conditions of the compact objects following Andreasson's approach, we focus on the conditions for the existence of dynamical compact objects. The radius of the outermost circular null geodesic is derived in higher dimensions, which is the lower bound on the minimally allowed radius of dynamically stable horizonless charged compact object. Subsequently, the upper bound on the mass-radius ratio is obtained. Our results are strongly dependent on the dimensions. What's more significant is that the developed bound is proven always to be stronger than the result following Andreasson's approach in higher dimensions.

Propagation dynamics of spin excitations along skyrmion strings

Magnetic skyrmions, topological solitons characterized by a two-dimensional swirling spin texture, have recently attracted attention as stable particle-like objects. In a three-dimensional system, a skyrmion can extend in the third dimension forming a robust and flexible string structure, whose unique topology and symmetry are anticipated to host nontrivial functional responses. Here we experimentally demonstrate the coherent propagation of spin excitations along skyrmion strings for the chiral-lattice magnet Cu2OSeO3. We find that this propagation is directionally non-reciprocal and the degree of non-reciprocity, as well as group velocity and decay length, are strongly dependent on the character of the excitation modes. These spin excitations can propagate over a distance exceeding 50 μm, demonstrating the excellent long-range ordered nature of the skyrmion-string structure. Our combined experimental and theoretical analyses offer a comprehensive account of the propagation dynamics of skyrmion-string excitations and suggest the possibility of unidirectional information transfer along such topologically protected strings.

1D Solitons in Saturable Nonlinear Media with Space Fractional Derivatives

AbstractTwo decades ago, standard quantum mechanics entered into a new territory called space‐fractional quantum mechanics, in which wave dynamics and effects are described by the fractional Schrödinger equation. Such territory is now a key and hot topic in diverse branches of physics, particularly in optics driven by the recent theoretical proposal for emulating the fractional Schrödinger equation. However, the light‐wave propagation in saturable nonlinear media with space fractional derivatives is yet to be clearly disclosed. Here, such nonlinear optics phenomenon is theoretically investigated based on the nonlinear fractional Schrödinger equation with nonlinear lattices—periodic distributions of either focusing cubic (Kerr) or quintic saturable nonlinearities—and the existence and evolution of localized wave structures allowed by the model are addressed. The model upholds two kinds of one‐dimensional soliton families, including fundamental solitons (single peak) and higher‐order solitonic structures consisting of two‐hump solitons (in‐phase) and dipole ones (anti‐phase). Notably, the dipole solitons can be robust stable physical objects localized merely within a single well of the nonlinear lattices—previously thought impossible. Linear‐stability analysis and direct simulations are executed for both soliton families, and their stability regions are acquired. The predicted solutions can be readily observed in optical experiments and beyond.

Derived categories of surfaces, O’Grady’s filtration, and zero-cycles on holomorphic symplectic varieties

Moduli spaces of stable objects in the derived category of a $K3$ surface provide a large class of holomorphic symplectic varieties. In this paper, we study the interplay between Chern classes of stable objects and zero-cycles on holomorphic symplectic varieties which arise as moduli spaces. First, we show that the second Chern class of any object in the derived category lies in a suitable piece of O’Grady’s filtration on the $\text{CH}_{0}$-group of the $K3$ surface. This solves a conjecture of O’Grady and improves on previous results of Huybrechts, O’Grady, and Voisin. Second, we propose a candidate for the Beauville–Voisin filtration on the $\text{CH}_{0}$-group of the moduli space of stable objects. We discuss its connection with Voisin’s recent proposal via constant cycle subvarieties, and prove a conjecture of hers on the existence of special algebraically coisotropic subvarieties for the moduli space.

Modeling and control of planar slippage in object manipulation using robotic soft fingers

Slippage occurrence has an important roll in stable and robust object grasping and manipulation. However, in majority of prior research on soft finger manipulation, presence of the slippage between fingers and objects has been ignored. In this paper which is a continuation of our prior work, a revised and more general method for dynamic modeling of planar slippage is presented using the concept of friction limit surface. Friction limit surface is utilized to relate contact sliding motions to contact frictional force and moment in a planar contact. In this method, different states of planar contact are replaced with a second-order differential equation. As an example of the proposed method application, dynamic modeling and slippage analysis of object manipulation on a horizontal plane using a three-link soft finger is studied. Then, a controller is designed to reduce and remove the undesired slippage which occurs between the soft finger and object and simultaneously move the object on a predefined desired path. Numerical simulations reveal the acceptable performance of the proposed method and the designed controller.

Fourier-Mukai transforms of slope stable torsion-free sheaves on a product elliptic threefold

On the product elliptic threefold X=C×S where C is an elliptic curve and S is a K3 surface of Picard rank 1, we define a notion of limit tilt stability, which satisfies the Harder-Narasimhan property. We show that under the Fourier-Mukai transform Φ on Db(X) induced by the classical Fourier-Mukai transform on Db(C), a slope stable torsion-free sheaf satisfying a vanishing condition in codimension 2 (e.g. a reflexive sheaf) is taken to a limit tilt stable object. We also show that a limit tilt semistable object on X is taken by Φ to a slope semistable sheaf, up to modification by the transform of a codimension 2 sheaf.

Why Bad Books Matter: Past and Future Directions for Understanding Reactionary Ideology

ABSTRACTA useful tool for learning more about the ways in which the hard Right communicates and integrates is the reactionary diatribe. This is significant in a political context where the hard Right not only is experiencing success, but the default categories of interpretation and criticism can lack bite. A fresh direction for research would link present politics back to historical practice but channel contemporary methods for rhetorical study, picking out reactionary writings as a stable object for inquiry. Therefore, this article (1) revives the category of reaction by re-picturing it as a ‘second-order’ ideology encompassing all those right-wingers professing to stand on the ‘wrong side of History’; (2) draws lessons from some defects of ‘populism’ theories; (3) places a methodological proposal in relation to earlier theories of reaction, which are confounded most of all by reactionary contradictoriness – a feature that rhetorical analysis is far better able to accommodate, inasmuch as messy, chaotic, sometimes ugly communication is grist to its mill. Lastly, (4) the diatribe model itself is described (key properties being digression, repetition and point-dwelling), and then laid out as groundwork for further, in-depth inquiry. In the meantime, an important truth surfaces: bad books matter.

Why have international metrology Heads called the New SI “fundamentally better” and could it be even better?

In November 2018, the 26th General Conference on Weights and Measures (CGPM) adopted the changes to the In­ternational System of Units (SI), which got the conventional name “the New SI”. These changes came into force on May 20, 2019, on World Metrology Day. International metrology Heads have called it “fundamentally better”. This article is devoted to discussing such an assessment.The article shows that the whole history of metrology development is the search for optimal physical quantities and units of measurement, as well as such stable phenomena and objects of nature that could be the basis for the reproduction of these units and creation of the measurement standards.It took almost 150 years of searching and taking certain steps before the ideas of scientists were put into practice in the New SI — quantum SI. The base of this system is fundamental physical constants (FPCs) — standards of nature, micro objects have become the carriers of the sizes of units, and methods of their connection with the macrocosm — quantum phenomena and effects.The article shows that in all measurement fields where quantum methods and definitions of units were implemented through FPCs, there was a significant — by 2–3 orders of magnitude — increase in the accuracy and reliability of the realization of units.The 26th CGPM made the final decision on the new definitions of the base units. The article contains an excerpt from Resolution 1 of the 26th CGPM 2018, as well as its Annexes.An analysis of new definitions of the base units is given. It is shown that the new definitions of second, metre and candela are relevant to their definitions in the previous version of SI and differ only in wording. The definition of kilogram is fundamentally new and is based on the fixed value of Planck’s constant. Significantly new definition is also obtained by the unit of electric current. This means the recognition of quantum methods in electrical measurements, which have in practice confirmed their outstanding metrological capabilities. Definition of kelvin through the Boltzmann constant, experts believe, will contribute to the development of primary thermometry and thermodynamics as a whole.The article also highlights the fundamental advantages of the New SI and outlines the prospective tasks of metrology.

The second rise of general relativity in astrophysics

The field equations, which are the mathematical basis of the theory of general relativity, provide us with a much larger variety of solutions to model the neutron stars and other compact objects than are used in the current astrophysics. We point out some important consequences of the new kind of solutions of the field equations, which can be obtained if the astrophysical usage of general relativity is not constrained, and outline an impact of these solutions on the models of internal structure of compact objects. If general relativity is not constrained, it enables to construct the stable object, with the outer surface above the event horizon, of whatever large mass. A new concept of relativistic compact object is a consequence of newly discovered property of gravity, yielded by the field equations in a spherically symmetric configuration of matter: in comparison with the Newtonian case, a particle is more effectively attracted by a nearer than a more distant matter.

ON THE FUSION OF CAMERA AND LIDAR FOR 3D OBJECT DETECTION AND CLASSIFICATION

Abstract. In this paper we present a sensor fusion framework for the detection and classification of objects in autonomous driving applications. The presented method uses a state-of-the-art convolutional neural network (CNN) to detect and classify object from RGB images. The 2D bounding boxes calculated by the CNN are fused with the 3D point cloud measured by Lidar sensors. An accurate sensor cross-calibration is used to map the Lidar points into the image, where they are assigned to the 2D bounding boxes. A one-dimensional K-means algorithm is applied to separate object points from foreground and background and to calculated accurate 3D centroids for all detected objects. The proposed algorithm is tested based on real world data and shows a stable and reliable object detection and centroid estimation in different kind of situations.

Соотношение ценностного и коммуникативного аспектов в изучении социокультурной традиции

The paper features the problem of correlation between two approaches to the phenomenon of tradition. The value approach sees tradition as a stable and transferable object. The communicative approach considers tradition as a construct that reflects the current perception of the past. The author analyzed the reasons for the formation of positions and their ratio. A phenomenological analysis proved that the separation and opposition of both approaches is structurally conditioned. The transfer of tradition involves its deconstruction, i.e. isolation of its substantial core from the context of the past to reconstruct it in the context of the present. Transfer depends on the type of communication, which, by developing from non-written to digital, increased the gap between the contexts of the transmitter and the recipient. As a result, the tradition is getting more deconstructed, while its core is becoming more susceptible to change. The value and communicative components of the tradition reflect the views on its different parts-reconstruction and deconstruction, respectively. The value approach assumes the point of view from the side of reconstruction, or reproduction of the core of tradition: this approach goes "from within" tradition and denies the deconstructive aspect. The communicative approach is a view from the side of deconstruction while striving to objectify the tradition. The communicative approach demonstrates the core of the tradition, thus putting the subject beyond the frame of values, outside the tradition. Hence, the principle of complementarity should be applied when considering tradition, both in its specific forms and in the conceptual aspect.