We consider “virtual” full-duplex relaying by means of half-duplex relays. In this configuration, each relay stage in a multi-hop relaying network is formed by at least two relays, used alternatively in transmit and receive modes, such that while one relay transmits its signal to the next stage, the other relay receives a signal from the previous stage. With such a pipelined scheme, the source ...

Kazutoshi Fujita, MD Toshihiro Fujiwara, MD, PhD Masao Kakibuchi, MD, PhD Department of Plastic Surgery Hyogo College of Medicine Hyogo, Japan Sir: T use of computer tomography angiography (CTA) is combined with ultrasound duplex scanning to identify perforating arteries preoperatively for abdominal free flap breast reconstruction.1 CTA shows the course of the blood vessels on the computer’s di...

HYPOTHESIS Spiral computed tomographic pulmonary angiography (CTPA) is sensitive and specific in diagnosing pulmonary embolism (PE) in critically ill surgical patients. DESIGN Prospective study comparing CTPA with the criterion standard, pulmonary angiography (PA). SETTING Surgical intensive care unit of an academic hospital. PATIENTS Twenty-two critically ill surgical patients with clini...

OBJECTIVE To test the efficiency of the direct duplex scanning parameters in the diagnosis of renal artery stenosis (RAS), and verify whether or not the cut-off points recommended by medical literature are the most appropriate means to distinguish lesion severity. METHODS Prospective study, including 62 patients with RAS, submitted to a duplex ultrasound scan and selective arteriography. The ...

Recently the in-band full-duplex in wireless communication has evolved into a mature technology since the self-interference cancellation technique is able to support fullduplex capability. Moreover, some researchers focus on the full-duplex media access control (MAC) protocol design for wireless local area networks (WLANs). However, it is assumed that all the node have full-duplex capability in...

Purpose: This study was carried out to evaluate the surgical outcome of patients with lower limb primary varicose veins. Material and methods: During the 4-year period between July 2006 and July 2010, 42 consecutive patients with primary varicose veins were surgically treated at North and West surgical Departments of Mayo Hospital, Lahore. Medical records and computerized data were retrospectiv...

DESCRIPTION Ureterocele is a rare cause of urinary obstruction which is commonly associated with significant renal-tract anomalies. Surgical decompression soon after diagnosis and further investigations to evaluate the renal tracts are important to prevent renal complications. We present a newborn female infantwith incidental large mass protruding from her vagina figure 1. The mass was firm and...

Mobile traffic is projected to increase 1000 times from 2010 to 2020. This poses significant challenges on the 5th generation (5G) wireless communication system design, including network structure, air interface, key transmission schemes, multiple access, and duplexing schemes. In this paper, full duplex networking issues are discussed, aiming to provide some insights on the design and possible...