On the structure of nonarchimedean analytic curves

Let K be an algebraically closed, complete nonarchimedean field and let X be a smooth K-curve. In this paper we elaborate on several aspects of the structure of the Berkovich analytic space X^an. We define semistable vertex sets of X^an and their associated skeleta, which are essentially finite metric graphs embedded in X^an. We prove a folklore theorem which states that semistable vertex sets of X are in natural bijective correspondence with semistable models of X, thus showing that our notion of skeleton coincides with the standard definition of Berkovich. We use the skeletal theory to define a canonical metric on H(X^an) := X^an - X(K), and we give a proof of Thuillier's nonarchimedean Poincar\'e-Lelong formula in this language using results of Bosch and L\"utkebohmert.Comment: 23 pages. This an expanded version of section 5 of arXiv:1104.0320 which appears in the conference proceedings "Tropical and Non-Archimedean Geometry

Alien Registration- Joseph, Sam (Freeport, Cumberland County)

https://digitalmaine.com/alien_docs/23667/thumbnail.jp

Comparison of uplink SAR values in train environment for different wireless technologies

A comparison of uplink Specific Absorption Rate (SAR) values in a train environment for different wireless technologies using macrocells or femtocells is presented. The comparison is based on both simulations and real-life experiments. Compared to a typical GSM900 macrocell scenario, the largest SAR reduction is observed when using a UMTS femtocell base station, which leads to uplink SAR reductions by a factor 358,820

Assessment and comparison of total RF-EMF exposure in femtocell and macrocell base station scenarios

The indoor coverage of a mobile service can be drastically improved by deployment of an indoor femtocell base station (FBS). However, the impact of its proximity on the total exposure of the human body to radio-frequency (RF) electromagnetic fields (EMFs) is unknown. Using a framework designed for the combination of near-field and far-field exposure, the authors assessed and compared the RF-EMF exposure of a mobile-phone (MP) user that is either connected to an FBS or a conventional macrocell base station while in an office environment. It is found that, in average macrocell coverage and MP use-time conditions and for Universal Mobile Telecommunications System technology, the total exposure can be reduced by a factor of 20-40 by using an FBS, mostly due to the significant decrease in the output power of the MP. In general, the framework presented in this study can be used for any exposure scenario, featuring any number of technologies, base stations and/or access points, users and duration

In situ measurement of absorption in high-power interferometers by using beam diameter measurements

We present a simple technique to make in situ measurements of the absorption in the optics of high-power laser interferometers. The measurement is particularly useful to those commissioning large-scale high power optical systems

Novel wearable antenna systems for high datarate mobile communication in healthcare

In critical healthcare applications, there is a need for reliable wideband mobile communication links, implemented by portable units with sufficient autonomy. We present the latest generation wearable antenna systems for invisible and comfortable integration in patients' or caregivers' garments. These active textile modules boast excellent performance and reliability, thanks to innovative antenna topologies, leveraged by the application of substrate integrated waveguide technology, pervasive integration of electronics and energy harvesters, and the application of multi-antenna processing techniques. Applications range from mobile communication links between caregivers and a coordination centre during interventions, over wireless sensor systems for patient monitoring, to relaying videos streams between a wireless endoscopy capsule and a remote control station

An Exploratory Investigation Into the Use of eAUP as an Alternative to Text-based Passwords

Security is one of the major concerns of every industry in the world today. One of the best ways of hacking into a computer system is brute forcing. And with the increase in computing, brute forcing has become faster and easy to do. Text-based passwords are still the most popular and most commonly used form of authentication even though the requirements for a good password are still increasing. Research has shown that the best text-based passwords are the random ones that have no sequence or pattern to them. But this also makes it difficult to remember. Well- documented research has shown that it is easier to remember an image than words, hence the adage A picture is worth a thousand words. Even though there are good policies for text-based passwords, the unpredictability of users\u27 attitudes and behavior has most of the time rendered these policies inefficient. The common trade-off for the complexity of text-based passwords is recallability. Most users would prefer to use a password they can easily remember than a complex one that they can easily forget. One of the proposed alternatives to text-based passwords is graphical passwords. There are several schemes that have been proposed but are still unpopular. This thesis investigated one of these schemes that are used on mobile devices to determine whether it can be used as an alternative to text-based passwords. Also this research proposes ways to improve this scheme and options of bringing it at par with the current minimum requirements of a good text-based password