[1] A global estimate of the direct effects of anthropogenic aerosols on solar radiation in cloudy skies is obtained by integrating satellite and ground-based observations with models of aerosol chemistry, transport, and radiative transfer. The models adopt global distribution of aerosol optical depths (from MODIS), clouds, water vapor, ozone, and surface albedo from various satellite climatolo...

The development of future geolocation systems requires a fundamental understanding of the importance of various system parameters, such as the number of sensors, the SNR, bandwidth, and channel conditions. We consider the bounds on time-based geolocation accuracy when all sensors experience non-line-of-sight (NLOS) conditions. While location accuracy generally improves with additional bandwidth...

Being inspired by child’s learning experience taught first and followed by observation and questioning, we investigate a critically supervised learning methodology for object detection in this work. Specifically, we propose a taught-observe-ask (TOA) method that consists of several novel components such as negative object proposal, critical example mining, and machine-guided question-answer (QA...

Wireless location is to determine the mobile station (MS) location in a wireless cellular communications system. When fewer base stations (BSs) may be available for location purposes or the measurements with large errors in non-line-of-sight (NLOS) environments, it is necessary to integrate all available heterogeneous measurements to achieve high location accuracy. This paper illustrates a hybr...

determination of mobile localization with time of arrival (toa) signal is a requirement in cellular mobile communication. in some of the previous methods, localization with non-line-of-sight (nlos) paths can lead to large position error. also for simplicity, in most simulations suppose non stationary actual environments as stationary. this paper proposes (residual test + recursive least square)...

Precise Time-of-Arrival (TOA) estimations of aircraft and drone signals are important for a wide set of applications including aircraft/drone tracking, air traffic data verification, or self-localization. Our focus in this work is on TOA estimation methods that can run on low-cost software-defined radio (SDR) receivers, as widely deployed in Mode S / ADS-B crowdsourced sensor networks such as t...

In this paper, we propose an efficient geo-location system for social safety robot using a single base station, where its location is obtained by direction of arrival (DOA) and time of arrival (TOA) of the radio signal. The proposed system requires two reference signals while the conventional systems generally deploy more than three reference signals. For estimating DOA and TOA information toge...

The extraction behaviour of zirconium(IV) from sulfuric acid medium has been studied with a binary mixture tri-n-octyl amine (TOA) and Cyanex923 (a four trialkyl phosphine oxides) in kerosene using novel liquid-liquid method. Quantitative TOA was by changing different parameters such as variation, extractant effect chloride ion concentration, temperature, metal concentration diluent effect, pH ...

In the field of sensor networks, impulse radio 60 GHz signals are even much more practical for accurate localization which is low cost, low complexity with high time and multipath resolution. Typically, accurate Time of Arrival (TOA) estimation is very important for localization. In order to improve precision of TOA estimation, a new TOA estimation algorithm based on energy detector (ED) is pro...

INTRODUCTION Tubo-ovarian abscess (TOA) is a conglomerated mass of pelvic organs including the tube, the ovary, and the bowel. The most commonly isolated organisms from TOAs are Escherichia coli (E. coli) and Bacteroides species. CASE REPORT We reported a case of Clostridium septicum (C. septicum) infection from a ruptured TOA with atypical clinical features. Culture of intra-abdominal free f...