ABSTRACT
Over time, the use of UAVs (unmanned aerial vehicles)/drones has increased across several civil and military application domains. Such domains include real-time monitoring, remote sensing, wireless coverage in disaster areas, search and rescue, product delivery, surveillance, security, agriculture, civil infrastructure inspection, and the like. This rapid growth is opening doors to numerous opportunities and conveniences in everyday life. On the other hand, security and privacy concerns for unmanned aerial vehicles/drones are progressively increasing. With limited standardization and regulation of unmanned aerial vehicles/drones, security and privacy concerns are growing. This paper presents a brief analysis of unmanned aerial vehicle's/drones security and privacy-related concerns. The paper also presents countermeasures and recommendations to address such concerns. While laying out a brief survey of unmanned aerial vehicles/drones, the paper also provides readers with up-to-date information on existing regulations, classification, architecture, and communication methods. It also discusses application areas, vulnerabilities, existing countermeasures against different attacks, and related limitations. In the end, the paper concludes with a discussion on open research areas and recommendations on how the security and privacy of unmanned aerial vehicles can be improved.
Subject(s)
Aircraft , Unmanned Aerial Devices , AgricultureABSTRACT
Situs inversus totalis is an uncommon anatomical congenital anomaly characterized by complete transposition of viscera with right-to-left reversal across the sagittal plane. Consequently, surgery in such cases is more technically challenging and requires a complete reorientation of visual-motor coordination skills. We describe a case of a 50-year-old gentleman with locally advanced lower esophagus carcinoma post-neoadjuvant chemoradiotherapy with situs inversus totalis and treated with minimally invasive McKeown esophagectomy using a left thoracoscopic, laparoscopic-assisted and right cervical approach. The operative procedure and difficulties during surgery are highlighted. Minimal invasive esophagectomy is safe and feasible in situs inversus totalis. Recognition of the anatomy with a meticulous preoperative planning is advocated for an uneventful operative intervention.
ABSTRACT
Porokeratosis represents a heterogeneous group of disorders characterized clinically by a distinctive ridge-like border and histologically by cornoid lamellae. Gardner's syndrome, a variant of familial adenomatous polyposis (FAP), is an autosomal dominant disease characterized by colorectal polyps, osteomas, epidermoid cysts and soft tissue tumors. Here we report a case of 18 yr old female who presented with porokeratosis of Mibelli with osteoma, multiple epidermoid cytsts, and solitary rectal polyp.
ABSTRACT
BACKGROUND: Tongue tumour thickness has been shown to have a correlation with neck nodal metastasis and hence patient survival. Current AJCC guidelines recommend inclusion of tongue tumour thickness measurement in routine radiologic staging. Several studies have attempted to define the accuracy of MRI in measuring tongue tumour thickness. The aim of our study was to compare tongue tumour thickness measured at T2-weighted and STIR sequences with histologic tongue tumour thickness. METHODS: Twenty-eight consecutive patients of tongue cancer who had undergone glossectomy were selected retrospectively. Tumours were measured in both STIR axial and T2-weighted coronal images and compared with histologic tumour thickness on resected specimens. Pearson's analysis was performed to determine the degree of correlation. Paired samples t-test was also used for comparison of mean tumour thicknesses measured on MRI with mean histologic tumour thickness. RESULTS: Pearson correlation analysis showed good correlation of tumour thickness measured on MRI with actual histologic tumour thickness (R=0.876). CONCLUSION: MRI provides a satisfactory prediction of tongue tumour thickness which in turn can be used todetermine the need for elective neck dissection in these patients.
