In the paper, a C6v-symmetric structure is thoroughly studied in which the valley Hall effect plays an important role when the Dirac cone at the corner point of the Brillouin region is opened, accompanied by a new band gap, by changing the symmetry of the structure from C6v into C3v. Further, the researchers analyze the acoustic wave propagation in two types of topological states in the range of this new band gap.

A new study found that people who presented to California emergency departments with deliberate self-harm had a suicide rate in the year after their visit 56.8 times higher than those of demographically similar Californians. People who presented with suicidal ideation had suicide rates 31.4 times higher than those of demographically similar Californians in the year after discharge. The findings, published in JAMA Network Open, reinforce the importance of universal screening for suicide risk in emergency departments and the need for follow-up care.

TSCs are emerging devices that combine the advantages of visible transparency and light-to-electricity conversion. One of the valuable prospective applications of such devices is their integration into buildings, vehicles, or portable electronics. Therefore, colour-perception and flexibility are important as well as the efficiency.

Pullman, Wash. - When people learn that a charitable contribution they earmarked for a specific project was used for another cause, they feel betrayed - and often punish the charity, new research from Washington State University indicates.

Those donors were less likely to give money to the charity in the future or do volunteer work for the organization. They also were more likely to say negative things about the charity, according to the research published in the January 2020 issue of the Journal of the Association for Consumer Research and available online.

Control of the polarization of light is a key feature for displays, optical data storage, optical quantum information, and chirality sensing. In particular, the direct emission of circularly polarized (CP) light has attracted great interest because of the enhanced performance of displays such as organic light-emitting diodes (OLEDs) and light sources for characterizing the secondary structure of proteins.

At a prehistoric archaeological site in Turkey, researchers have discovered two 8,500-year-old human teeth, which had been used as pendants in a necklace or bracelet. Researchers have never documented this practice before in the prehistoric Near East, and the rarity of the find suggests that the human teeth were imbued with profound symbolic meaning for the people who wore them.

While trying to develop a comparatively easy, inexpensive way to give physicians and their patients with bladder cancer a better idea of likely outcome and best treatment options, scientists found that sophisticated new subtyping techniques designed to do this provide no better information than long-standing pathology tests.

Antiparticles - subatomic particles that have exactly opposite properties to those that make up everyday matter - may seem like a concept out of science fiction, but they are real, and the study of matter-antimatter interactions has important medical and technological applications. Marcos Barp and Felipe Arretche from the Universidade Federal de Santa Catarina, Brazil have modelled the interaction between simple molecules and antiparticles known as positrons and found that this model agreed well with experimental observations. This study has been published in EPJ D.

INFORMS journal Manufacturing & Service Operations Management New Study Takeaways:

Shoppers' decisions are increasingly shaped by their experience and the desire for better service.

Brick-and-mortar stores that work together to provide waiting area entertainment options can obtain higher profits than they would by providing their own entertainment.

A retrospective study of nearly 9800 women with breast cancer who participated in randomized clinical trials was presented today at the 2019 San Antonio Breast Cancer Symposium. The study found that women with government insurance (Medicaid or Medicare) were much less likely to participate in a clinical trial compared to their privately insured counterparts. The few women with government insurance who did participate in the trials were more likely to stop treatment early and had lower survival.

Institutional investors tend to put their money largely in public companies, persuaded that market discipline makes their accounts more reliable than private ones' and most financial literature confirms their beliefs.

A new study by scholars from University of Bolzano, Bocconi University, and Stern School of Business concludes on the contrary that, if you circumscribe the comparison to public and private companies with similar organizational structures, private firms display a higher accounting (earnings) quality.

Boston, MA, USA -- 6 December 2019
The near ubiquitous penetration of mobile phones among smallholder farmers in developing countries has enabled a powerful new tool for dispensing agricultural advice to farmers. Low acquisition and marginal costs make digital extension scalable at low cost when compared to traditional in person extension practices.

WASHINGTON -- Researchers have used advanced imaging approaches to achieve super-resolution microscopy at unprecedented speeds. The new method should make it possible to capture the details of processes occurring in living cells at speeds not previously possible.

Whales' large bodies help them consume their prey at high efficiencies, a more than decade-long study of around 300 tagged whales now shows, but their gigantism is limited by prey availability and foraging efficiency. These results, though seemingly intuitive, have been difficult to confirm with quantitative data because of challenges studying these gargantuan mammals in the field. However, this information is a necessary beginning to efforts to preserve these endangered giants, says Terrie Williams in a related Perspective.

COLUMBUS, Ohio - Bans and other policies restricting e-cigarette sales could do more public harm than good, according to a group of public-health, tobacco-policy and ethics experts.

In a piece published online today (Dec. 12, 2019) in the journal Science, the authors, including three public health deans, caution that blanket policies developed in a rush to address two different concerns come with dangerous downsides - most notably the risk of taking away a powerful tool to help smokers quit.