Adaptive tracking of people and vehicles using mobile platforms

Tracking algorithms have important applications in detection of humans and vehicles for border security and other areas. For large-scale deployment of such algorithms, it is critical to provide methods for their cost- and energy-efficient realization. To this end, commodity mobile devices have significant potential for use as prototyping and testing platforms due to their low cost, widespread availability, and integration of advanced communications, sensing, and processing features. Prototypes developed on mobile platforms can be tested, fine-tuned, and demonstrated in the field and then provide reference implementations for application-specific disposable sensor node implementations that are targeted for deployment. In this paper, we develop a novel, adaptive tracking system that is optimized for energy-efficient, real-time operation on off-the-shelf mobile platforms. Our tracking system applies principles of dynamic data-driven application systems (DDDAS) to periodically monitor system operating characteristics and apply these measurements to dynamically adapt the specific classifier configurations that the system employs. Our resulting adaptive approach enables powerful optimization of trade-offs among energy consumption, real-time performance, and tracking accuracy based on time-varying changes in operational characteristics. Through experiments employing an Android-based tablet platform, we demonstrate the efficiency of our proposed tracking system design for multimode detection of human and vehicle targets.publishedVersionPeer reviewe

Ureteral spread of a primary cutaneous diffuse large B‑cell lymphoma, leg type

We report a case of 76-year-old man, with a past medical history of primary cutaneous diffuse large B-cell lymphoma, leg type (PCDLBCL-LT), who presented with ureteral tumor diagnosed as urothelial carcinoma on imaging investigations. Histological examination showed an unusual finding. The tumor was a ureteral localization of the PCDLBCL-LT previously diagnosed. To the best of our knowledge, this is the first case of PCDLBCL-LT with ureteral spread described in the literature

Status of herbicide-resistant Lolium populations in wheat fields in Tunisia

International audienceThe evolution of herbicide resistance in weeds is a worldwide phenomenon in modern cropping systems. The presence of resistant populations can severely hamper herbicide-based weed control, thus leading to the need for a more accurate use of these products. In Tunisia, the first report of evolved herbicide resistance concerned Lolium rigidum populations collected in wheat fields in northern Tunisia in 1996 and found to be resistant to acetyl-coenzyme A carboxylase-inhibiting (ACCase) herbicides. The objective of this study is to detect and characterise herbicide resistance in ryegrass (Lolium spp). The sensitivity of nine ryegrass populations, collected in wheat fields in northern Tunisia, was performed with two ACCase-inhibiting herbicides and an acetolactate synthase (ALS)-inhibiting herbicide. Resistant plants were genotyped to detect mutant resistant ACCase and ALS alleles. The results showed that resistance to clodinafop is very developed, as it was observed in all populations tested. However, resistance to sulfonylurea is less developed but seems to be emerging. Although the mutant ALS resistant alleles account for most of the resistance to sulfonylurea, those of ACCase explain less than 20% of the resistance observed in ryegrass populations. The other part would be due to other mechanisms that are likely metabolism-based resistance. The cross-resistance pattern conferred by this type of resistance is very unpredictable as it may relate to different herbicide chemical families and this could explain the resistance observed in some populations for the new molecule pinoxaden. To reduce the spread of the phenomenon of resistance in wheat fields, chemical weed control could not by itself be a long term solution. The use of integrated crop management methods, including cultivation and the alternation of different herbicides and modes of action, would be proposed

Oman Medical Specialty Board Malignant Epithelioid Hemangioendothelioma: A Case Report

Abstract Malignant epithelioid hemangioendothelioma (EH) is a rare tumor of vascular origin. We report a case of a woman who was found to have multiple hepatic masses in the right lobe of the liver on radiologic investigations, initially misdiagnosed as a metastatic carcinoma. The diagnosis of EH was made on histopathological study and confirmed by immunohistochemistry, which showed diffuse response for CD34 marker and no response to tissue CEA, HMB-45 or S-100 protein. Partial hepatectomy was made with good results