Thermal radiation from subwavelength objects and the violation of Planck’s law

Thermal radiation is a ubiquitous physical phenomenon that has been usually described with the help of Planck’s law, but recent developments have proven its limitations. Now, experimental advances have demonstrated that the far-field thermal radiation properties of subwavelength objects drastically violate Planck’s lawJ.C.C. acknowledges financial support from the Spanish MINECO (Contract No. FIS2017–84057-P

On the displacement function of isometries of Euclidean buildings

In this note we study the displacement function $d_g(x):=d(gx,x)$ of an isometry $g$ of a Euclidean building. We give a lower bound for $d_g(x)$ depending on the distance from $x$ to the minimal set of $g$

Tracking-Based Non-Parametric Background-Foreground Classification in a Chromaticity-Gradient Space

This work presents a novel background-foreground classification technique based on adaptive non-parametric kernel estimation in a color-gradient space of components. By combining normalized color components with their gradients, shadows are efficiently suppressed from the results, while the luminance information in the moving objects is preserved. Moreover, a fast multi-region iterative tracking strategy applied over previously detected foreground regions allows to construct a robust foreground modeling, which combined with the background model increases noticeably the quality in the detections. The proposed strategy has been applied to different kind of sequences, obtaining satisfactory results in complex situations such as those given by dynamic backgrounds, illumination changes, shadows and multiple moving objects

Real-time shot detection based on motion analysis and multiple low-level techniques

To index, search, browse and retrieve relevant material, indexes describing the video content are required. Here, a new and fast strategy which allows detecting abrupt and gradual transitions is proposed. A pixel-based analysis is applied to detect abrupt transitions and, in parallel, an edge-based analysis is used to detect gradual transitions. Both analysis are reinforced with a motion analysis in a second step, which significantly simplifies the threshold selection problem while preserving the computational requirements. The main advantage of the proposed system is its ability to work in real time and the experimental results show high recall and precision values

P2P Based Architecture for Global Home Agent Dynamic Discovery in IP Mobility

Mobility in packet networks has become a critical issue in the last years. Mobile IP and the Network Mobility Basic Support Protocol are the IETF proposals to provide mobility. However, both of them introduce performance limitations, due to the presence of an entity (Home Agent) in the communication path. Those problems have been tried to be solved in different ways. A family of solutions has been proposed in order to mitigate those problems by allowing mobile devices to use several geographically distributed Home Agents (thus making shorter the communication path). These techniques require a method to discover a close Home Agent, among those geographically distributed, to the mobile device. This paper proposes a peer-topeer based solution, called Peer-to-Peer Home Agent Network, in order to discover a close Home Agent. The proposed solution is simple, fully global, dynamic and it can be developed in IPv4 and IPv6.No publicad

Transactions Costs and the Viability of Rural Financial Intermediaries

In its attempt to examine the transaction cost of banks, this study develops a method of estimating transaction cost for each bank activity. It also explains the differences and the composition cost among commercial private development and rural banks. Results in this paper is hoped to improve the efficient functioning of the formal financial system.financial sector, rural sector, transaction cost, financial intermediaries

Transaction Cost and the Viability of Rural Financial Intermediaries

Recognition of a continuous improvement in the formal financial system is necessary for economic growth. Over the years, the government has been infusing cheap funds into the rural sector. Unfortunately, it overlooks a number of serious issues regarding bank’s transaction costs. This article develops a method of estimating transaction costs for each bank activity. It also explains the differences and the composition of transaction costs among commercial banks, rural banks and private development banks.financial system, banking system, commercial banks, transaction cost, deposit liabilities

Institutional Credit in Rural Niger: Low Performance and High Costs

Marked "No. 1351" on title page.Paper documents nature and magnitude of transaction costs of rural credit in Niger. System is limited to input delivery role, lacking essential banking practices. Costs of the system are substantial, with largest share borne by the institutions involved. The system does not perform a meaningful role in resource allocation