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showing 10 items of 4384 documents
Structural studies on filamin domain interactions
2015
Moving RTS/CTS to the frequency domain: an efficient contention scheme for 802.11ax networks
2019
In this paper, we propose a contention mechanism based on the execution of multiple contention rounds in the frequency domain (ReCHo), which is designed to offer high throughput performance and robustness with respect to imperfect carrier sensing. The main idea is using narrow tones as signalling messages for performing channel access contentions and allowing the Access Point (AP) to echo these signals, in order to extend the sensing capabilities to all the stations associated to the AP. In particular, we refer to the emerging IEEE 802.11ax standard, showing how our scheme can boost performance of random access with respect to the current version of IEEE 802.11ax OFDMA Back-Off (OBO), even …
'Good to Repeat': Making Random Access Near-Optimal with Repeated Contentions
2020
Recent advances on WLAN technology have been focused mostly on boosting network capacity by means of a more efficient and flexible physical layer. A new concept is required at MAC level to exploit fully the new capabilities of the PHY layer. In this article, we propose a contention mechanism based on Repeated Contentions (ReCo) in frequency domain. It provides a simple-to-configure, robust and short-term fair algorithm for the random contention component of the MAC protocol. The throughput efficiency of ReCo is not sensitive to the number of contending stations, so that ReCo does not require adaptive tuning of the access parameters for performance optimization. Efficiency and robustness is …
Teacher attitudes towards inclusive education in Finland and Brandenburg, Germany and the issue of extra work
2016
Positive teacher attitudes are considered an important prerequisite for the successful inclusion of students with special educational needs in the mainstream classrooms. This study surveyed teacher opinions about inclusion in Finland (N = 298) and Brandenburg, Germany (N = 163), two educational systems in which the number of students transferred to segregated special education is exceptionally high in international comparison. For the measurement of attitudes, a 10-item scale, teachers’ attitudes towards inclusive education, was used. The results showed that Finnish teachers were more positive towards inclusion than Brandenburg teachers (d = 0.46). The Brandenburg teachers were especially w…
Teacher attitudes in Italy after 40 years of inclusion
2019
In 1977, Italy adopted a policy to fully include students with disabilities in mainstream classrooms. This study surveyed the attitudes of Italian teachers towards inclusive education 40 years after this reform. The data were collected from 153 basic school teachers using the Teachers' Attitudes towards Inclusion Scale (TAIS). The results indicate that the Italian teachers had a high level of commitment to inclusive education. Approximately 90% of the respondents agreed that students with special educational needs should be educated in mainstream classrooms, and only 7% felt that they should be transferred to special education classrooms instead. To improve the quality of inclusive educatio…
Finnish reform of the funding and provision of special education : the views of principals and municipal education administrators
2015
This study examines the current state of special education provision and resources in Finland after the extensive reform of the government transfer system and Basic Education Act implemented in 2010–2011. Data were collected from a survey of compulsory school principals and from interviews with the highest-ranking officials in municipal education administration. The results show that participants viewed the Basic Education Act as having a more significant impact on the provision of special education than the reform of the government transfer system. Partly due to the reforms, local authorities have targeted the resources of special education differently and used resources more effectively. …
Statements About the Pervasiveness of Behavior Require Data About the Pervasiveness of Behavior
2020
Despite recent close attention to issues related to the reliability of psychological research (e.g., the replication crisis), issues of the validity of this research have not been considered to the same extent. This paper highlights an issue that calls into question the validity of the common research practice of studying samples of individuals, and using sample-based statistics to infer generalizations that are applied not only to the parent population, but to individuals. The lack of ergodicity in human data means that such generalizations are not justified. This problem is illustrated with respect to two common scenarios in psychological research that raise questions for the sorts of the…
Jaulnes (Seine-et-Marne), "Les Graviers" : rapport de diagnostic
2010
Ce diagnostic a permis la mise au jour de structures du Néolithique récent/final dont une sépulture, ainsi que des monuments funéraires protohistoriques et des structures gallo-romaines.
Viroporins, Examples of the Two-Stage Membrane Protein Folding Model
2015
Viroporins are small, α-helical, hydrophobic virus encoded proteins, engineered to form homo-oligomeric hydrophilic pores in the host membrane. Viroporins participate in multiple steps of the viral life cycle, from entry to budding. As any other membrane protein, viroporins have to find the way to bury their hydrophobic regions into the lipid bilayer. Once within the membrane, the hydrophobic helices of viroporins interact with each other to form higher ordered structures required to correctly perform their porating activities. This two-step process resembles the two-stage model proposed for membrane protein folding by Engelman and Poppot. In this review we use the membrane protein folding …
L’innovation-valeur comme dynamique stratégique. Le cas du Pentathlon Moderne
2018
Cette recherche s’intéresse à l’existence d’une dynamique d’innovations stratégiques. Elle est étudiée au travers de l’innovation-valeur (Kim et Mauborgne, 2005) dans le cas de la fédération internationale de pentathlon moderne (UIPM). Cette instance doit innover pour assurer sa survie face à ses principales parties prenantes, le Comité International Olympique (CIO) et ses clients, les pratiquants. L’étude de cas permettra de tester l’existence d’une dynamique d’innovations stratégiques.