نتایج جستجو برای: regional anomaly
تعداد نتایج: 244271 فیلتر نتایج به سال:
The relative entropy of the massive free bosonic field theory is studied on various compact Riemann surfaces as a universal quantity with physical significance, in particular, for gravitational phenomena. The exact expression for the sphere is obtained, as well as its asymptotic series for large mass and its Taylor series for small mass. One can also derive exact expressions for the torus but n...
There are several classes of homogeneous Fermi systems that are characterized by the topology of the energy spectrum of fermionic quasiparticles: (i) gapless systems with a Fermi surface, (ii) systems with a gap in their spectrum, (iii) gapless systems with topologically stable point nodes (Fermi points), and (iv) gapless systems with topologically unstable lines of nodes (Fermi lines). Superfl...
The problem of event detection is far from being new. This is a classical problem in many contexts. Many studies target event detection in the dynamics of various systems [7]. Two main approaches are followed, named anomaly-based and signature-based. The underlying principle of anomaly-based approaches [4, 3] is that one knows the normal behavior of the system. Then, any observation that differ...
SUMMARY Establishing the diagnosis of morning glory disc anomaly is crucial to appropriate patient treatment. Although typically made clinically, the diagnosis is not always straightforward, especially in circumstances where physical examination is limited. The goal of this study was to define the spectrum and frequency of orbital findings in a series of patients with funduscopically-confirmed ...
Complex activity modeling and identification of anomaly is one of the most interesting and desired capabilities for automated video behavior analysis. A number of different approaches have been proposed in the past to tackle this problem. There are two main challenges for activity modeling and anomaly detection: 1) most existing approaches require sufficient data and supervision for learning; 2...
We review the resolution currently available with seismic tomography, in particular the ability of seismic waves to image mantle plumes, and discuss frequently asked questions about artifacts, interpretation and possible systematic errors. These aspects are discussed in more detail for two case histories offering different problems in the tomographic interpretation: Iceland and Hawaii. Regional...
We review various K-theory classification conjectures in string theory. Sen conjecture based proposals classify D-brane trajectories in backgrounds with no H flux, while Freed-Witten anomaly based proposals classify conserved RR charges and magnetic RR fluxes in topologically time-independent backgrounds. In exactly solvable CFTs a classification of well-defined boundary states implies that the...
This paper presents a novel anomaly detection methodology for the protection of electricity critical infrastructures that learns the normal behaviour of the system, builds up a profile and detects anomalous operations which deviate from the profile. This can be used to identify attacks, failures and accidents and it can also be used to improve state estimation, correct topology errors and infor...
Abstract A period that lasted from 900-1300 AD has been known as the Medieval Climate Anomaly. This indicated warming of earth’s temperature. However, this phenomenon is still subject debate today, whether global or regional warming. Several studies concluded warm a and an important period, although external forcing mainly similar to present day. climate archives Indonesia i.e. lake sediment, m...
A two-month-old male infant presented with cardiac heart failure. Two-dimensional (2D) echocardiography showed an anomaly of the left coronary artery (LCA) arising from the pulmonary artery (Fig. 1) with mitral regurgitation (Fig. 2). Three-dimensional (3D) echocardiography was performed to determine left ventricular (LV) volume (i.e., 33, paediatric matrix probe 2—7MHz, Philips). The global an...
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