When does a state become a ‘‘nuclear weapon state’’? How we choose to answer this question has significant implications for proliferation assessment, analysis, and policy. Traditionally, the standard demarcation line has been a state’s first nuclear test, but in recent years analysts have increasingly focused instead on the accumulation of a significant quantity (SQ) of fissile material. The ar...

Life science laboratories today have to rely on procedural techniques to store and manage large sequence datasets. Procedural techniques are cumbersome to use and are often very inefficient compared to optimized declarative techniques. We have designed and implemented a system called Periscope/SQ that makes it possible to rapidly express complex queries within a declarative framework and take a...

2,4-Bis[4-(N,N-diisobutylamino)-2,6-dihydroxyphenyl] squaraine (SQ) was employed as a donor material in organic photovoltaic cells based on planar heterojunctions. We studied optical properties of SQ films, and discussed its photovoltaic performance via numerical fitting and simulation on the photovoltaic cells. Exciton diffusion length (LD) in SQ films (4.5 nm) derived from optical simulation ...

Although e-service quality (e-SQ) is vital for online purchases and loyalty, and the Internet is globalizing services, limited knowledge exists regarding the impact of Web users’ cultural profiles on their perceptions of e-SQ. Within the tourism industry, this is crucial as Web sites target multicultural users and firms are trying to develop localized Web stores. This study addresses this gap b...

Multiwavelength data for Stephan's Quintet (SQ) are consistent with the following model for this compact galaxy group. (1) Discordant redshift NGC 7320 is an unrelated foreground galaxy. (2) In the past SQ was an accordant redshift quartet involving NGC 7317, 18A, 19 and 20C. NGC 7320C collided (probably not for the first time) with the group a few times 10 8 years ago and stripped the interste...

BACKGROUND The majority of allergic patients are poly-sensitized. For causal treatment by allergy immunotherapy (AIT) a single or few allergen products containing the clinically most relevant allergens are applied, but few data on tolerability of multiple application of AIT is available. The aim of our study was to investigate safety and tolerability in patients who started treatment by subling...