Search results for "Head"
showing 10 items of 1640 documents
Multi-cloud privacy preserving schemes for linear data mining
2015
This paper presents an approach to privacy-preserving data mining that relies upon a relatively simple secret sharing scheme. Its main feature is that users, sensitive data owners, are engaged in the secret sharing operations that protect their privacy. They are grouped in independent clouds connected to a central unit, the data miner, that only manages the aggregated data of each cloud, therefore avoiding the disclosure of information belonging to single nodes. We propose two privacy preserving schemes, with different privacy levels and communication costs. When designing them, we assume that some users' data might become inaccessible during the operation of the privacy preserving protocol…
Internal regulation of schools : School headmasters and the regulation of teachers'acitivities
2007
The decentralization process of educational system and autonomy given to secondary schools leads to redefinition of the role of school headmasters particularly in the field of pedagogy. Moreover, the traditional mechanism of regulation of teachers' activities (inspection) has been declined. In this case the headmasters of the schools should act as the regulator of teachers' activities. On the one side in literature it has been set that the conflict between bureaucratic and professional characteristics leads to weakening the regulation and problems existing between the headmasters and his teachers. Are the consequences of all the above mentioned issues lead to loose the regulation of teacher…
Geschichte der Schwarzen-Häupter in Riga, nebst einer Beschreibung des Arthurhofes und seiner Denkwürdigkeiten, nach handschriftlichen Nachrichten da…
1831
Rādītājs "Verzeichniß der von 1658 bis 1831 erwählten Mitglieder der Schwarzen-Häupter": 23.-30. lpp.; papildinājumam klāt iesietas 31.-32. lpp. no vēlāka izdevuma ([Verzeichniß der von 1832 bis 1893 erwählten Mitglieder der Schwarzen-Häupter]).
La construcción de subjetividades en itinerarios de fracaso escolar. Itinerarios de inserción sociolaboral para adolescentes en riesgo
2016
RESUMEN La modernización del sistema de Formación Profesional del Estado español se remonta a los años 90. Desde entonces, ha evolucionado significativamente, teniendo los desarrollos europeos como marco de referencia. Con la extensión de la escolarización hasta los 16 años, se introdujo en el año 1994 un tipo de formación profesionalizadora de muy bajo nivel de cualificación, especialmente diseñada para los adolescentes clasificados como de bajo rendimiento académico en Educación Secundaria y para aquellos en situación de vulnerabilidad social. Esta formación fue rediseñada en 2006 y en 2013. Nuestra contribución, enmarcada en una investigación más amplia desarrollada en el seno de un proy…
A Geographical Self-Organizing Approach for Vehicular Networks
2012
Cooperative vehicular networks have always been considered as the perfect way to bring more comfort to the passengers and more safety to the human life. Thus, research community and governmental organizations are interested to study and deploy these networks. The vehicular networks principle is connecting vehicles to each other and to existing infrastructure. However, their industrialization faces some challenges: (i) high mobility, (ii) frequently partitioned network, (iii) geographically constrained topology, and (iv) scalability. Therefore, in contrast to traditional networks, vehicular network protocols focus on both achieving adequate QoS level and reducing overhead. Achieving these tw…
Growing Hierarchical Self-organizing Maps and Statistical Distribution Models for Online Detection of Web Attacks
2013
In modern networks, HTTP clients communicate with web servers using request messages. By manipulating these messages attackers can collect confidential information from servers or even corrupt them. In this study, the approach based on anomaly detection is considered to find such attacks. For HTTP queries, feature matrices are obtained by applying an n-gram model, and, by learning on the basis of these matrices, growing hierarchical self-organizing maps are constructed. For HTTP headers, we employ statistical distribution models based on the lengths of header values and relative frequency of symbols. New requests received by the web-server are classified by using the maps and models obtaine…
Electrophysiological and behavioral studies to test attractants semiochemicals for Stegobium paniceum L. (Coleoptera: Anobiidae)
2017
Stegobium paniceum (L.) (Coleoptera: Anobiidae), the drugstore beetle, is one of the major pests for a wide variety of dry and durable stored agricultural products. Females of S. paniceum produce a sex pheromone, (2S,3R,1'R)-Stegobinone, that attracts males. Nevertheless, trapping experiments using the synthetic sex pheromone in many cases showed low levels of captures, perhaps because of isomerization of the pheromone compound in ambient conditions. To date, very few brands of commercially S. paniceum pheromone are available in the market. In this study, we evaluated in electrophysiological (EAG) and behavioral bioassays (two-choice olfactometer), the response of S. paniceum male and femal…
By-catch of cetaceans and other species of conservation concern during pair trawl fishing operations in the Adriatic Sea (Italy)
2010
By-catch is one of the main sources of anthropogenic mortality in marine species of conservation concern worldwide. Between 2006 and 2008, the Consorzio Nazionale Interuniversitario per le Scienze del Mare (CoNISMa) coordinated a monitoring programme of cetacean by-catch in Italian pelagic trawlers, funded in compliance with European Regulation 812/2004. Sixteen independent observers monitored a total of 3141 hauls. The observation coverage ranged between 0.9 and 6.3% of the regional fishing effort. Almost all by-catch events were recorded in the northern Adriatic Sea. By-catch rates of bottlenose dolphins (Tursiops truncatus) and loggerhead turtles (Caretta caretta) were 0.0006 and 0.0255 …
Hatching Success of Caretta caretta on a Mediterranean Volcanic Beach: Impacts from Environmental Parameters and Substrate Composition
2022
New data on the potential impact of environmental parameters and the mineralogical nature of the substrate on the hatching success of the loggerhead sea turtle Caretta caretta on a volcanic beach on Linosa Island in the central Mediterranean Sea are reported. During 2 years of investigation (2018-19), five nests were observed. The temperature and moisture of the nests were determined along with the grain size and mineralogical nature of the substrate. The temperature values of the nests recorded at depths of 5 and 35 cm showed an average temperature incubation of 32.2°C ± 1.4°C and 32.8°C ± 1.6°C, respectively, with peaks close to 37°C. The sedimentological analysis carried out on two cores…
Impact of Heavy Metals in Eggs and Tissues of C. caretta along the Sicilian Coast (Mediterranean Sea)
2022
In this study we compared the heavy metal concentration found in different tissues and eggs of the loggerhead sea turtle and evaluated the potential ecotoxicological risk for this important species. Eighteen heavy metal elements were determined in different tissues (liver, gonads, fat, kidney, heart, brain, and spleen) of nine individuals of Caretta caretta found stranded along the coasts of Messina (Sicily, Italy) and in the shell and yolk of six eggs from the island of Linosa (Sicily, Italy). For the analysis of the heavy metals, we used the analytical procedures in accordance with the EPA 200.8 method supplemented by EPA 6020b with three replicates for each measurement. The elements anal…