910 research outputs found
The Tourism Experience Offered by Religious Theme Parks: Taman Tamadun Islam (TTI) in Malaysia
Theme parks are major drivers of tourism development and experience is a central concept in tourism research. This study investigates the experience potential associated with religious theme parks which offer a combination of religious and secular activities. The experiences of visitors to Taman Tamadun Islam (TTI), a Muslim theme park based in Malaysia, are identified through the analysis of visitors’ feedback on Tripadvisor
The structural basis for enhancer-dependent assembly and activation of the AAA transcriptional activator NorR
Impact of Model Gender on The Effectiveness of Advertisements Targeted at Older Viewers: An Analysis in The Context of Ageing
Advertising efficiency relies partly on the viewer’s identification to the model used in the ad and model gender facilitates the identification process. Relying on gerotranscendance theory (Tornstam, 2009), we assume that gender identification is not as important to seniors as it used to be when they were younger and that the gender of the model will have no effect on variables of the persuasion process. The results of a survey on 512 seniors aged 60 to 85 reveals that the model’s gender has little impact on the perception of ads by senior viewers. However, matching product gender and model gender can be relevant in several specific instances
Accurate determination of the scattering length of metastable Helium atoms using dark resonances between atoms and exotic molecules
We present a new measurement of the s-wave scattering length a of
spin-polarized helium atoms in the 2^3S_1 metastable state. Using two-photon
photoassociation spectroscopy and dark resonances we measure the energy
E_{v=14}= -91.35 +/- 0.06 MHz of the least bound state v=14 in the interaction
potential of the two atoms. We deduce a value of a = 7.512 +/- 0.005 nm, which
is at least one hundred times more precise than the best previous
determinations and is in disagreement with some of them. This experiment also
demonstrates the possibility to create exotic molecules binding two metastable
atoms with a lifetime of the order of 1 microsecond.Comment: 4 pages, 4 figure
Dopamine-sensitive alternation and collateral behaviour in a Y-maze: effects of d-amphetamine and haloperidol
Introduction:
The frequency of spontaneous alternation in a Y-maze (visiting each arm in turn at p>50%) depends on the influence of the attention given to intra- and extra-maze cues.
We examined the observing responses shown by rats (collateral rearing and head-turning behaviour), the habituation to the novelty and alternation responses over 15 minutes/day, four days in a row - in a Y-maze under enhanced and reduced dopamine (DA) activity (amphetamine- and haloperidol treatment).
Methods:
Prior to placement in a Y-maze for 15 minutes observation on 4 successive days animals were treated with either amphetamine (0.5 or 2.5 mg/kg) or pre-treated with a low dose of haloperidol (0.08 mg/kg, ip).
Results:
1/ Amphetamine treated animals chose the arms at random on day 1, but after the higher dose on day 2-4 they perseverated their choice. The controls maintained their alternation over this period.
2/ The amphetamine-induced effects on alternation were prevented by prior treatment with the neuroleptic haloperidol.
3/ Amphetamine treatment increased the frequency of rearing in the middle at the choice point of the Y-maze. Haloperidol pre-treatment blocked this increase at the midpoint on day 1, and blocked the rearing behavior at the end of an arm on day 2.
4/ Amphetamine also increased the frequency of head turning and "looking", - an effect that was also prevented by haloperidol. (day 2 onwards).
5/ Haloperidol increased the duration of" looking" and of rearing at the end of an arm later in testing..
Conclusions:
Two effects are postulated to have occurred.
a) a conflict on day 1 between the novelty-controlled sensory or attentional effects, that leads to an alternation of arm-choice, and amphetamine-induced DA activity that facilitates an alternation of behavioural responses: -- the result was random choice and increased rearing at the choice point.
b) On days 2-4 the drug-induced effects on switching motor responses came to control behaviou
Locomotor activity in relation to dopamine and noradrenaline in the nucleus accumbens, septal and frontalk areas: a 6-hydroxydopamine study
The Study and the Method:
The locomotor activity of adult male Sprague-Dawley was automatically recorded in a circular corridor - circadian changes are described as well as the response to the novel situation and its habituation over three hours.
Four groups of animals were compared, - those with sham/vehicle operations and those with 6-OHDA dopamine (DA) depleting lesions in -
the frontal cortex,
the limbic septum, and
the ventral tegmental area (VTA - A10).
Results:
1/ Lesions of the VTA resulted in increased dark-phase activity, - and a large response to an apomorphine challenge in comparison to other lesion and control groups:
2/ Septal 6-OHDA lesions did not alter locomotion:
3/ After frontal DA depletion there was a small increase of locomotion after the apomorphine challenge, that might reflect increased receptor sensitivity in cortical or sub-cortical areas:
(Table 1: HPLC measures of NA, DA and DOPAC for each group in the prefrontal cortex, septum and N. accumbens)
Figure 1 illustrates the cumulative photocell counts per hour over 24 hours for the 4 groups:.
Figure 2 illustrates the cumulative photocell counts every 10 minutes over 90 minutes post-apomorphine treatment - maximal at 20-30 minutes and habituating over 60 minutes (90 minutes for the VTA group): overall activity VTA >> Frontal > Septal > Controls.
Conclusions:
Along with correlations found for motor activity with cortical levels of DA and NA, these results are interpreted to support a role for DA, NA and the region of the frontal cortex in modulating locomotion that is primarily mediated by mesolimbic VTA - accumbens - DA activity
A Robust Method for Drilling Monitoring using Acoustic Emission
Acoustic Emission (AE) is considered an efficient tool for monitoring of machining operations, for both tool condition and working piece integrity. However, the use of AE is more challenging in case of drilling, due to heavy dependence of AE signals to process parameters. Monitoring drilling using AE thus requires robust methods to extract useful information in signals. The paper describes such a method that adapts itself to AE signals obtained during drilling, allowing the automatic set-up of an adaptive threshold to perform AE count rate. Experiments have been conducted that show the robustness of the method and its usefulness in drilling monitoring.International audienceAcoustic Emission (AE) is considered an efficient tool for monitoring of machining operations, for both tool condition and working piece integrity. However, the use of AE is more challenging in case of drilling, due to heavy dependence of AE signals to process parameters. Monitoring drilling using AE thus requires robust methods to extract useful information in signals. The paper describes such a method that adapts itself to AE signals obtained during drilling, allowing the automatic set-up of an adaptive threshold to perform AE count rate. Experiments have been conducted that show the robustness of the method and its usefulness in drilling monitoring
Frequency shifts of photoassociative spectra of ultracold metastable Helium atoms : a new measurement of the s-wave scattering length
We observe light-induced frequency shifts in one-color photoassociative
spectra of magnetically trapped He atoms in the metastable
state. A pair of ultracold spin-polarized helium atoms is excited into
a molecular bound state in the purely long range potential connected to
the asymptote. The shift arises from the optical coupling of
the molecular excited bound state with the scattering states and the bound
states of two colliding atoms. We measure the frequency-shifts for
several ro-vibrational levels in the potential and find a linear
dependence on the photoassociation laser intensity. Comparison with a
theoretical analysis provides a good indication for the s-wave scattering
length of the quintet () potential, nm, which
is significantly lower than most previous results obtained by non-spectroscopic
methods.Comment: 7 pages, 4 figure
Evolution entre 2007 et 2009 de la résistance des Entérobactéries et de Pseudomonas aeruginosa à la ciprofloxacine, en fonction de la consommation de fluoroquinolones au CHU d'Angers
National audienc
Construindo a identidade agroecológica através de trocas de experiências entre assentamentos da reforma agrária no estado de São Paulo.
Resumo: Este trabalho faz parte do projeto ?Capacitação sócio-ambiental para construção de projetos de desenvolvimento sustentável em assentamentos rurais no estado de São Paulo?, uma parceria da Embrapa Meio Ambiente com o INCRA, MST e outras organizações de agricultores assentados. Assim, propomos apresentar uma etapa dos trabalhos que vem sendo desenvolvido nos assentamentos Itapeva e Sepé Tiaraju, nos respectivos municÃpios de Itapeva/SP e Ribeirão Preto/SP. Iniciado em 2009, este trabalho visa a assessorar e potencializar os trabalhos de transição agroecológica através da aproximação de agricultores assentados com processos diferentes de ocupação da terra, porém com mesmos objetivos de diversificação do sistema produtivo de forma sustentável. Abstract: This work is part of the project "Capacity building for social and environmental projects for sustainable development in rural settlements in the state of São Paulo, a partnership withEmbrapa Environment INCRA, MST and other organizations offarmers settled.Therefore, we propose to present a step in the work being donein the settlements and Itapeva Sepe Tiaraju, in their municipality of Itapeva / SP, Ribeirao Preto / SP. Started in 2009, this work aims to assist and enhance the work through the transitionalagro- ecological approach to resettled farmers with different processes acupaçao of the earth, but with the same objectivesof diversification of the productive system in a sustainable manner
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