The Ethics Behind Cosmetic Procedures: The Strive for Aesthetics

Although the Internet has provided people with nearly unlimited access to seemingly endless topics, the accuracy of this information is not guaranteed. A primary advantage of the Internet – that anyone can publish almost anything and that information spreads virally – is also a double-edged sword. Complex scientific topics are often simplified and diluted to a fault for non-scientists, or lay people, to understand. Research from subjects that directly relate to people’s everyday lives, like psychology, appear to experience the greatest misinterpretation on the Internet. In fact, an entire genre, coined pop psychology, describes the antiquated, unproven, oversimplified, misunderstood, and misinterpreted psychological concepts promoted by non-scientists that are prevalent throughout the World Wide Web (Lilienfeld, Lynn, & Beyerstein, 2010). One very prominent psychology myth that has persisted for decades concerns brain lateralization. Despite the studies that have illuminated the details of brain lateralization and articles devoted to debunking this myth, numerous social media websites continue to offer quizzes and articles that reinforce the belief that some individuals are right-brained, which means they are the creative type, and some are left-brained, which means they are more mathematical and logical

UA68/7/2/2 Club Bulletin, No. 1

Bulletin created by Le Cercle Francais in French

UA68/7/2/2 Club Bulletin, No. 2

Bulletin created by Le Cercle Francais in French

UA68/7/2/2 Club Bulletin, No. 3

Bulletin created by Le Cercle Francais in French

UA68/7/2/2 Picnic Program

Program: Le Cercle Francais presents son pique-nique annuel a Kittlestic

UA68/7/2/2 Club Bulletin, No. 5

Bulletin created by Le Cercle Francais in French

Surface Acoustic Wave-Based Microfluidic Device for Microparticles Manipulation: Effects of Microchannel Elasticity on the Device Performance

: Size sorting, line focusing, and isolation of microparticles or cells are fundamental ingredients in the improvement of disease diagnostic tools adopted in biology and biomedicine. Microfluidic devices are exploited as a solution to transport and manipulate (bio)particles via a liquid flow. Use of acoustic waves traveling through the fluid provides non-contact solutions to the handling goal, by exploiting the acoustophoretic phenomenon. In this paper, a finite element model of a microfluidic surface acoustic wave-based device for the manipulation of microparticles is reported. Counter-propagating waves are designed to interfere inside a PDMS microchannel and generate a standing surface acoustic wave which is transmitted to the fluid as a standing pressure field. A model of the cross-section of the device is considered to perform a sensitivity analysis of such a standing pressure field to uncertainties related to the geometry of the microchannel, especially in terms of thickness and width of the fluid domain. To also assess the effects caused by possible secondary waves traveling in the microchannel, the PDMS is modeled as an elastic solid material. Remarkable effects and possible issues in microparticle actuation, as related to the size of the microchannel, are discussed by way of exemplary results

Particle bioturbation in Massachusetts Bay: Preliminary results using a new deliberate tracer technique

To better understand temporal and particle size-dependent bioturbation processes, we conducted a study of sediment mixing in Massachusetts Bay using a newly developed deliberate tracer technique. Sediments from a 32-m, fine-grained site were collected and the 38–62 (“silt”) and 63–125 (“sand”) μm fractions isolated. These particle-size fractions were labeled with two different noble metals (Au: silt & Ag: sand) using a thermal diffusion technique. Mixtures of the tracers were spread onto the seafloor in April and July 1992 by divers and were tube-cored (3 replicates) ˜ 80 d later in each case. Vertical profiles of the tracers were measured at μg/g (Ag) and ng/g (Au) levels by instrumental neutron activation analysis. During the spring experiment, Au (silt) was mixed to depths \u3e 15 cm and displayed multiple subsurface maxima, whereas Ag (sand) was confined to the upper 5 cm of the bed and showed a near monotonic decrease in concentration with depth. In the fall experiment, the tracers displayed more congruent down-core profiles consisting of near-surface maxima and several subsurface peaks. Two nonlocal bioturbation modes are suggested by the tracer data: reverse conveyor-belt transport and head-down deposit feeding or excavation. A particle caching strategy by an unidentified macrofaunal species is postulated to explain the subsurface peaks, but remains conjectural without better species-level natural history information regarding solid-phase bioturbation

L\u27Honneur d\u27une Femme Program

Directed by M. and Mme. André Roman A photocopy of L\u27Honneur d\u27une Femme program, play ca. 1940.https://digitalcommons.usm.maine.edu/fac-theatre-and-songbooks/1011/thumbnail.jp

A Microfluidic Device Based on Standing Surface Acoustic Waves for Sorting and Trapping Microparticles

Microfluidic devices can provide innovative means to handle and control the transport of (bio)particles within a fluid flow. The advantage of microscale devices is that different components can be integrated in a single chip at low cost, with a negligible power consumption, compared to alternative solutions. In this work, a numerical investigation is developed on the use of standing surface acoustic waves (SAWs) generated within a microfluidic channel in order to manipulate microparticles. Far-field waves are generated via inter-digital transducers (IDTs), travel on the surface of a piezoelectric substrate and finally interfere in the channel, giving rise to a standing wave solution in terms of acoustic pressure. Results are reported for different geometries of the channel, to define the sensitivity of the acoustic pressure field to the relevant geometric features of the channel. This investigation shows how the acoustic radiation and drag forces interact with each other to move and focus the particles, possibly leading to a separation of heterogeneous ones, and generally provide a way to manipulate them at a small scale