31,396 research outputs found
Differential modulation of performance in insight and divergent thinking tasks with tDCS
While both insight and divergent thinking tasks are used to study creativity, there are reasons to believe that the two may call upon very different mechanisms. To explore this hypothesis, we administered a verbal insight task (riddles) and a divergent thinking task (verbal fluency) to 16 native English speakers and 16 non-native English speakers after they underwent Transcranial Direct Current Stimulation (tDCS) of the left middle temporal gyrus and right temporo- parietal junction. We found that, in the case of the insight task the depolarization of right temporo-parietal junction and hyperpolarization of left middle temporal gyrus resulted in increased performance, relative to both the control condition and the reverse stimulation condition in both groups (non-native > native speakers). However, in the case of the divergent thinking task, the same pattern of stimulation resulted in a decrease in performance, compared to the reverse stimulation condition, in the non-native speakers. We explain this dissociation in terms of differing task demands of divergent thinking and insight tasks and speculate that the greater sensitivity of non-native speakers to tDCS stimulation may be a function of less entrenched neural networks for non-native languages
Analysis of top to bottom- shuffles
A deck of cards is shuffled by repeatedly moving the top card to one of
the bottom positions uniformly at random. We give upper and lower bounds
on the total variation mixing time for this shuffle as ranges from a
constant to . We also consider a symmetric variant of this shuffle in which
at each step either the top card is randomly inserted into the bottom
positions or a random card from the bottom positions is moved to the top.
For this reversible shuffle we derive bounds on the mixing time. Finally,
we transfer mixing time estimates for the above shuffles to the lazy top to
bottom- walks that move with probability 1/2 at each step.Comment: Published at http://dx.doi.org/10.1214/10505160500000062 in the
Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute
of Mathematical Statistics (http://www.imstat.org
Key distribution in PKC through Quantas
Cryptography literally means "The art & science of secret writing & sending a
message between two parties in such a way that its contents cannot be
understood by someone other than the intended recipient". and Quantum word is
related with "Light". Thus, Quantum Cryptography is a way of descripting any
information in the form of quantum particles. There are no classical
cryptographic systems which are perfectly secure. In contrast to Classical
cryptography which depends upon Mathematics, Quantum Cryptography utilizes the
concepts of Quantum Physics which provides us the security against the
cleverest marauders of the present age. In the view of increasing need of
Network and Information Security, we do require methods to overcome the
Molecular Computing technologies (A future technology) and other techniques of
the various codebrakers. Both the parts i.e. Quantum Key distribution and
Information transference from Sender to Receiver are much efficient and secure.
It is based upon BB84 protocol. It can be of great use for Govt. agencies such
as Banks, Insurance, Brokerages firms, financial institutions, e-commerce and
most important is the Defense & security of any country. It is a Cryptographic
communication system in which the original users can detect unauthorized
eavesdropper and in addition it gives a guarantee of no eavesdropping. It
proves to be the ultra secure mode of communication b/w two intended parties.Comment: 11 Pages, JGraph-Hoc Journal 201
From Practice to Policy to Practice
Recent molecular dynamics simulation results have increased conceptual understanding of the grazing and the ploughing friction at elevated temperatures, particularly near the substrate's melting point. In this commentary we address a major constraint concerning its experimental verification
Atomistic aspects of ductile responses of cubic silicon carbide during nanometric cutting
Cubic silicon carbide (SiC) is an extremely hard and brittle material having unique blend of material properties which makes it suitable candidate for microelectromechanical systems and nanoelectromechanical systems applications. Although, SiC can be machined in ductile regime at nanoscale through single-point diamond turning process, the root cause of the ductile response of SiC has not been understood yet which impedes significant exploitation of this ceramic material. In this paper, molecular dynamics simulation has been carried out to investigate the atomistic aspects of ductile response of SiC during nanometric cutting process. Simulation results show that cubic SiC undergoes sp3-sp2 order-disorder transition resulting in the formation of SiC-graphene-like substance with a growth rate dependent on the cutting conditions. The disorder transition of SiC causes the ductile response during its nanometric cutting operations. It was further found out that the continuous abrasive action between the diamond tool and SiC causes simultaneous sp3-sp2 order-disorder transition of diamond tool which results in graphitization of diamond and consequent tool wear
Perceptions and Labor Market Outcomes of Immigrants in Australia after 9/11
I examine whether after the terrorist attacks of September 11, 2001 Muslim immigrants and immigrants who fit the Muslim Arab stereotype in Australia perceive a greater increase in religious and racial intolerance and discrimination compared to other immigrant groups. I also examine whether there is a differential change in their labor market outcomes. I find that after 9/11 there is a greater increase in the likelihood of Muslim men and of those who look like Muslims to report a lot of religious and racial intolerance and discrimination relative to other immigrants. Further, I do not find evidence that after 9/11 Muslims or their stereotypes show a differential change in the likelihood of looking for a new main job or of being employed. There is also no evidence of a differential change in hours worked or in wage incomes. This suggests that the Australian labor market did not react to attitudinal changes in society, at least in the immediate aftermath of 9/11.discrimination, immigrants, September 2001, 9/11
Trade induced growth impacts of corporate entry in the food sector: A case study of fruits and vegetables sub sector in the Punjab State of India
Study indicated that the entry of corporate sector in the Punjab State is both in retail and wholesale trade of the fruits & vegetables sub sector. At the organized retail stores these companies have provided its consumers a single window service for the various product assortments while within the fruits & vegetables category (have minuscule scales) widened the product selection choices. Corporate entry in wholesale trade has linked several product specific production belts with medium to high income consumers through various market segments such as organized stores, traditional wholesale/retail markets and the food service. These companies have also provided product variety through imports while opportunities for crop diversification towards higher value crops through exports. In the fruits & vegetables sub sector companies engaged in the retail trade have adopted for short to medium while those in wholesale trade for medium to long-term more sustainable approaches for the sourcing of supplies to build up competitive advantages. This has started generating growth in the Punjab state that has manifested in terms of higher incomes for as the partner farmers and creation of employment for the skilled, semi-skilled and unskilled manpower throughout the supply chain. As the market sizes of these companies expand and diversify in the domestic/global markets it shall enhance growth thereby magnify its impacts. --Fruits & vegetables trade,corporate groups,growth
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