In 1954 a woman was operated on for bilateral varicose long saphenous veins. The saphenofemoral junctions were tied and the saphenous trunks were stripped from the groin to the ankles. Six months later she returned with almost identical varices. How could they have filled? Reexamination showed that when the veins were emptied, and a tourniquet applied at the groin, on standing they immediately ...

This prospective and multicenter study shows the results at 1 year of radiofrequency-powered segmental thermal obliteration (RSTO) carried out with the ClosureFast procedure. The RSTO clinical and duplex ultrasound imaging results were evaluated at 3 days, 3 months, 6 months, and 1 year. All procedures were carried out on outpatients under tumescent local anesthesia. Among the 295 members who w...

Photovoltaic-electrolysis water splitting (PV-EWS) is the most promising approach for high solar-to-hydrogen (STH) efficiency. The present PV-EWS systems achieve highest STH performance by using a III-V triple-junction configuration, which, however, involves complex and expensive manufacture process. Therefore, in this work, we demonstrate III–V double junction device that can be used as an alt...

Introduction: Electronic portal imaging devices (EPIDs) are fundamentally used for instantaneous verification of the patient set‐up, block shape, and leaf positions during radiation therapy. In radiotherapy, situations arise in which an inclined PTV must be treated mutually with adjacent nodal regions. This methodology is most widely used for matching tangential/lateral breas...

The development of high-performance solar cells offers a promising pathway toward achieving high power per unit cost for many applications. Because state-of-the-art efficiencies single-junction are approaching the Shockley-Queisser limit, multi-junction (MJ) very attractive high-efficiency cells. This paper reviews progress in III–V compound and MJ In addition, analytical results efficiency pot...

AIM The innovations for disease management need to be thoroughly evaluated so that their benefits and potential downsides can be compared with the already existing approaches. Endovascular laser (EVL) treatment for varicose veins offers today several advantages over surgical standard stripping. The Italian Endovenous-laser Working Group (IEWG) is a homogeneous group of surgeons and phlebologist...

112 Varicose veins are a relatively common disorder, affecting 10–15% of men and 20–25% of women [1] and represent one of the most frequent vascular medical problems. Varices are the consequence of superficial venous insufficiency and can lead to esthetic problems and frequent symptoms, such as aching, discomfort, pruritus and muscle cramps. Complications include edema, eczema, lipodermatoscler...

A numerical study is presented to investigate the electronic transport properties through a synthetic DNA molecule based on a quasiperiodic arrangement of its constituent nucleotides. Using a generalized Green's function technique, the electronic conduction through the poly(GACT)-poly(CTGA) DNA molecule in a metal/DNA/metal model structure has been studied. Making use of a renormalization schem...