G. Vigna - Academia.edu (original) (raw)
Papers by G. Vigna
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Lecture Notes in Computer Science, 2014
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Atherosclerosis Supplements, 2007
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Proceedings Ninth International Workshop on Software Specification and Design, 1998
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Proceedings 2015 Network and Distributed System Security Symposium, 2015
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Advances in Information Security, 2001
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Lecture Notes in Computer Science, 2011
Fast-flux botnets are a growing security concern on the Internet. At their core, these botnets ar... more Fast-flux botnets are a growing security concern on the Internet. At their core, these botnets are a large collection of geographically-dispersed, compromised machines that act as proxies to hide the location of the host, commonly referred to as the “mothership,” to/from which they are proxying traffic. Fast-flux botnets pose a serious problem to botnet take-down efforts. The reason is that,
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Proceedings of the 27th Annual Computer Security Applications Conference on - ACSAC '11, 2011
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20th Annual Computer Security Applications Conference, 2004
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Journal of Inherited Metabolic Disease, 1987
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Journal of Alloys and Compounds, 2006
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IEEE Transactions on Software Engineering, 1998
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Current Pharmaceutical Design, 2005
Low density lipoprotein (LDL) oxidative modification in the vascular wall seems to be a key facto... more Low density lipoprotein (LDL) oxidative modification in the vascular wall seems to be a key factor in atherosclerosis development. Oxidised LDLs might recruit monocytes and favour their transformation into foam cells through a receptor-mediated intake (scavenger pathway). Moreover oxidised LDLs show cytotoxic potential which is probably responsible for endothelial cell damage and macrophage degeneration in the atherosclerotic human plaque. Following the oxidation hypothesis of atherosclerosis the role of natural antioxidants, i.e. Vitamin C, Vitamin E and carotenoids, has been investigated in a large number of epidemiological, clinical and experimental studies. Animal studies indicate that dietary antioxidants may reduce atherosclerosis progression, and observational data in humans suggest that antioxidant vitamin ingestion is associated with reduced cardiovascular disease, but the results of randomised controlled trials are mainly disappointing. It has been suggested that natural antioxidants may be effective only in selected subgroups of patients with high levels of oxidative stress or depletion of natural antioxidant defence systems. The favourable effects shown by some studies relating antioxidant dietary intake and cardiovascular disease, may have been exerted by other chemicals present in foods. Flavonoids are the ideal candidates, since they are plentiful in foods containing antioxidant vitamins (i.e. fruits and vegetables) and are potent antioxidants. Tea and wine, rich in flavonoids, seem to have beneficial effects on multiple mechanisms involved in atherosclerosis. Future studies should probably select patients in a context of high-oxidative stress / low-antioxidant defence, to verify if antioxidants may really prove useful as therapeutic anti-atherosclerotic agents.
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Biomedical Materials, 2010
Titanium powder production by the hydride-dehydride method has been developed as a non-expensive ... more Titanium powder production by the hydride-dehydride method has been developed as a non-expensive process. In this work, commercially pure grade two Ti specimens were hydrogenated. The hydrided material was milled in a planetary mill. The hydrided titanium powder was dehydrided and then sieved to obtain a particle size between 37 and 125 microm in order to compare it with a commercial powder produced by chemical reduction with a particle size lower than 150 microm. Cylindrical green compacts were obtained by uniaxial pressing of the powders at 343 MPa and sintering in vacuum. The powders and the density of sintered compacts were characterized, the oxygen content was measured and in vivo tests were performed in the tibia bones of Wistar rats in order to evaluate their biocompatibility. No differences were observed between the materials which were produced either with powders obtained by the hydride-dehydride method or with commercial powders produced by chemical reduction regarding modifications in compactation, sintering and biological behaviour.
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Lecture Notes in Computer Science, 2014
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Atherosclerosis Supplements, 2007
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Proceedings Ninth International Workshop on Software Specification and Design, 1998
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Proceedings 2015 Network and Distributed System Security Symposium, 2015
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Advances in Information Security, 2001
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Lecture Notes in Computer Science, 2011
Fast-flux botnets are a growing security concern on the Internet. At their core, these botnets ar... more Fast-flux botnets are a growing security concern on the Internet. At their core, these botnets are a large collection of geographically-dispersed, compromised machines that act as proxies to hide the location of the host, commonly referred to as the “mothership,” to/from which they are proxying traffic. Fast-flux botnets pose a serious problem to botnet take-down efforts. The reason is that,
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Proceedings of the 27th Annual Computer Security Applications Conference on - ACSAC '11, 2011
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20th Annual Computer Security Applications Conference, 2004
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Journal of Inherited Metabolic Disease, 1987
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Journal of Alloys and Compounds, 2006
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IEEE Transactions on Software Engineering, 1998
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Current Pharmaceutical Design, 2005
Low density lipoprotein (LDL) oxidative modification in the vascular wall seems to be a key facto... more Low density lipoprotein (LDL) oxidative modification in the vascular wall seems to be a key factor in atherosclerosis development. Oxidised LDLs might recruit monocytes and favour their transformation into foam cells through a receptor-mediated intake (scavenger pathway). Moreover oxidised LDLs show cytotoxic potential which is probably responsible for endothelial cell damage and macrophage degeneration in the atherosclerotic human plaque. Following the oxidation hypothesis of atherosclerosis the role of natural antioxidants, i.e. Vitamin C, Vitamin E and carotenoids, has been investigated in a large number of epidemiological, clinical and experimental studies. Animal studies indicate that dietary antioxidants may reduce atherosclerosis progression, and observational data in humans suggest that antioxidant vitamin ingestion is associated with reduced cardiovascular disease, but the results of randomised controlled trials are mainly disappointing. It has been suggested that natural antioxidants may be effective only in selected subgroups of patients with high levels of oxidative stress or depletion of natural antioxidant defence systems. The favourable effects shown by some studies relating antioxidant dietary intake and cardiovascular disease, may have been exerted by other chemicals present in foods. Flavonoids are the ideal candidates, since they are plentiful in foods containing antioxidant vitamins (i.e. fruits and vegetables) and are potent antioxidants. Tea and wine, rich in flavonoids, seem to have beneficial effects on multiple mechanisms involved in atherosclerosis. Future studies should probably select patients in a context of high-oxidative stress / low-antioxidant defence, to verify if antioxidants may really prove useful as therapeutic anti-atherosclerotic agents.
Bookmarks Related papers MentionsView impact
Biomedical Materials, 2010
Titanium powder production by the hydride-dehydride method has been developed as a non-expensive ... more Titanium powder production by the hydride-dehydride method has been developed as a non-expensive process. In this work, commercially pure grade two Ti specimens were hydrogenated. The hydrided material was milled in a planetary mill. The hydrided titanium powder was dehydrided and then sieved to obtain a particle size between 37 and 125 microm in order to compare it with a commercial powder produced by chemical reduction with a particle size lower than 150 microm. Cylindrical green compacts were obtained by uniaxial pressing of the powders at 343 MPa and sintering in vacuum. The powders and the density of sintered compacts were characterized, the oxygen content was measured and in vivo tests were performed in the tibia bones of Wistar rats in order to evaluate their biocompatibility. No differences were observed between the materials which were produced either with powders obtained by the hydride-dehydride method or with commercial powders produced by chemical reduction regarding modifications in compactation, sintering and biological behaviour.
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