Search results for "ATTAC"

Defending Surveillance Sensor Networks Against Data-Injection Attacks Via Trusted Nodes

2018

By injecting false data through compromised sensors, an adversary can drive the probability of detection in a sensor network-based spatial field surveillance system to arbitrarily low values. As a countermeasure, a small subset of sensors may be secured. Leveraging the theory of Matched Subspace Detection, we propose and evaluate several detectors that add robustness to attacks when such trusted nodes are available. Our results reveal the performance-security tradeoff of these schemes and can be used to determine the number of trusted nodes required for a given performance target.

Probabilistic Transition-Based Approach for Detecting Application-Layer DDoS Attacks in Encrypted Software-Defined Networks

2017

With the emergence of cloud computing, many attacks, including Distributed Denial-of-Service (DDoS) attacks, have changed their direction towards cloud environment. In particular, DDoS attacks have changed in scale, methods, and targets and become more complex by using advantages provided by cloud computing. Modern cloud computing environments can benefit from moving towards Software-Defined Networking (SDN) technology, which allows network engineers and administrators to respond quickly to the changing business requirements. In this paper, we propose an approach for detecting application-layer DDoS attacks in cloud environment with SDN. The algorithm is applied to statistics extracted from…

New client puzzle approach for DoS resistance in ad hoc Networks

2010

In this paper we propose a new client puzzle approach to prevent Denial of Service (DoS) attacks in ad hoc networks. Each node in the network first solves a computational problem and with the solution has to create and solve a client puzzle. By combining computational problems with puzzles, we improve the efficiency and latency of the communicating nodes and resistance in DoS attacks. Experimental results show the effectiveness of our approach.

La relazione di attaccamento con i caregiver professionali. Un’indagine esplorativa nelle comunità per minori,

2018

Mechanical Characterization of Polysaccharide/polyaminoacid Hydrogels as Potential Scaffolds for Tissue Regeneration

2011

The mechanical properties of hydrogel scaffolds based on hyaluronic acid (HA) that were chemically crosslinked with α,β-poly(N-2-hydroxyethyl)(2-aminoethylcarbamate)-D,L-aspartamide (PHEA-EDA) were investigated. Variation of these properties as a function of three different PHEA-EDA amounts used to crosslink HA has been related to the reaction efficiency evaluated using a colorimetric assay. Moreover, the amount of unreacted amino groups that was still present in the hydrogels was related to the attachment behavior of human dermal fibroblasts to the hydrogel surface. The mechanical data and biological results suggest the suitability of the investigated hydrogels as scaffolds for the regener…

Five-to-Six Membered Ring-rearrangements in the Reaction of 5-Perfluoroalkyl-1,2,4-oxadiazoles with Hydrazine and Methylhydrazine

2006

The hydrazinolysis reaction of 5-perfluoroalkyl-1,2,4-oxadiazoles with hydrazine or methylhydrazine as bidentate nucleophiles has been investigated. The reaction occurred through the addition of the bidentate nucleophile to the C(5)-N(4) double bond of the 1,2,4-oxadiazole followed by ring-opening and ring-closure (ANRORC) involving the second nucleophilic site of the reagent. This ring-closure step could involve either the original C(3) of the 1,2,4-oxadiazole (giving a five-to-five membered ring rearrangement) or an additional electrophilic center linked to it (exploiting a five-to-six membered ring rearrangement). An alternative initial nucleophilic attack may involve the additional elec…

The moderating effect of attachment styles on the relationships between maltreatment experiences and internalizing and externalizing problems among a…

2020

Multiple studies have documented the relationship between child maltreatment and internalizing and externalizing problems. Evidence suggests that the link between child maltreatment and these psychopathological outcomes may be moderated by various factors. Attachment styles may be one such moderating factor in this relationship. This study seeks to explore whether different attachment style profiles are associated with different forms of maltreatment as well as internalizing and externalizing symptoms, and whether attachment styles may moderate the link between different forms of maltreatment and internalizing and externalizing problems. For this purpose, 387 students from Italian public hi…

Rodzice zastępczy wobec problemów dzieci z Zespołem zaburzenia więzi

2013

Adaptacja i późniejsze życie w rodzinie zastępczej jest sprawą trudną zarowno dla dziecka, jak i dla rodziny, która je przyjmuje. Wiele dzieci niesie z sobą bagaż przykrych doświadczeń, a co za tym idzie mają znikomą lub żadną zdolność do budowania więzi. Artykuł przedstawia wybrane zagadnienia dotyczące więzi i przywiązania w układzie rodzice zastępczy - dziecko - rodzice biologiczni. Szczególną uwagę zwrócono na Zespół zaburzenia więzi, który dodatkowo komplikuje proces reintegracji rodziny biologicznej.

Verso una definizione delle influenze multidimensionali tra i contesti di vita: analisi delle relazioni fra stili di attaccamento ed organizational c…

2009

Doświadczenie rozwodu rodziców w dzieciństwie a style przywiązania w związkach intymnych młodych dorosłych

2019

Today, over 1/3 of all marriages entered into each year end in divorce. Children struggle with a whole spectrum of negative influences as a result. The purpose of this study was to investigate the negative aspects of divorce and its effect on the functioning of children of divorced parents in their adult lives. The study considered the effects of divorce on intimate relationships; particular attention is paid to the influence of parental divorce on the communication and attachment styles of the intimate relationships of adults whose parents are divorced. Having studied the cases of 101 people (50 people from an active research group and 51 from a control group) using the “Marital and Partne…