Peter Riedl

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Selective obliteration of the testicular vein as a treatment for varicocele is described in 51 patients. Twenty-five patients had a history of infertility. A coaxial catheter-balloon catheter system was used. The procedure was done on an outpatient basis. The complications and success rates are comparable to postoperative results. Four of the 25 patients(More)
Ninety-seven patients received transfemoral sclerotherapy of the spermatic vein for varicocele. After observation for 2 to 5 years, follow-up was available in 69 patients (71.2%), in 11 of whom the procedure failed (16.0%). Complications during angiography (N=12, 12.4%) or sclerotherapy (N=31, 32.0%) did not require hospital treatment. At least one(More)
The ongoing evolution of mobile phones to "pocket computers" generated a demand for more and more applications to be ported to the mobile phone. Because a full security assessment for a whole mobile operating system would be prohibitively costly, currently security critical applications can not be implemented. We address this challenge by introducing(More)
Following the implantation of biodegradable vascular grafts, macrophages and fibroblasts are the major two cell types recruited to the host-biomaterial interface. In-vitro biocompatibility assessment usually involves one cell type, predominantly macrophages. In this study, macrophage and fibroblast mono- and co-cultures, in paracrine and juxtacrine(More)
In this paper, we study the concept of security zones as an intermediate layer of compartmentalization on mobile devices. Each of these security zones is isolated against the other zones and holds a different set of applications and associated user data and may apply different security policies. From a user point of view, they represent different contexts(More)
Indoor localization is becoming increasingly important for mobile applications. WLAN fingerprinting is a compelling technique because it builds upon existing infrastructure and client hardware available in off-the-shelf mobile devices. We evaluate different methods for WLAN fingerprint classification with a focus on on-device localization. The main(More)
The economic importance of qualitative research has been growing consistently during the last decades. Being one of the major streams in the "research industry" it provides not only a valuable tool box for generating basic consumer insights, but it is also an essential part of the annual revenue of most research companies. As a consequence it is of utmost(More)