Background: Social and contact networks affect both epidemic spread and intervention implementation. Network-based interventions are most powerful when the full network structure is known. However, in practice, resource constraints require decisions to be made based on partial network information. We investigated how the effectiveness of network-based vaccination schemes varied based on the acc...

In Wikipedia, good articles are wanted. While Wikipedia relies on collaborative effort from online volunteers for quality checking, the process of selecting top quality articles is time consuming. At present, the duty of decision making is shouldered by only a couple of administrators. Aiming to assist in the quality checking cycles so as to cope with the exponential growth of online contributi...

It is a privilege, as well as a singular honor, for me to place Ronald L. Graham’s name in nomination for the Presidency of the American Mathematical Society. Graham is one of the charismatic figures in contemporary mathematics, as well as the leading problem-solver of his generation. For the last twenty-five years, he has been the central figure in the development of discrete mathematics. His ...

What is it? • Usnic acid is a complex polycyclic chemical compound produced naturally by certain lichens species. • Lichens containing usnic acid have been used as traditional medicines and crude drugs in other countries. • Usnic acid as a pure substance has been formulated in creams, toothpaste, mouthwash, deodorants and sunscreen products, either as an active principle or a preservative. FDA ...

Engaging social networks to encourage preventive health behavior offers a supplement to conventional mass media campaigns and yet we do not fully understand the conditions that facilitate or hamper such interpersonal diffusion. One set of factors that should affect the diffusion of health campaign information involves a person's community. Variables describing geographic communities should pred...

In this paper, we formalize existing normative criteria used to judge presidential selection contests by modeling the translation of citizen votes in primaries and caucuses into delegates to the national party conventions. We use a statistical model that enables us to separate the form of electoral responsiveness in presidential selection systems, as well as the degree of bias toward each of th...

Prior research has demonstrated that victims of peer victimization show reduced psychological adjustment, social adjustment, and physical well-being compared with nonvictims. However, little research has addressed whether this maladjustment continues over the long term. This study examined adjustment in 72 high school students who had participated in a peer-nomination procedure assessing peer v...