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Graphene and topological insulators (TI) possess two-dimensional (2D) Dirac fermions with distinct physical properties. Integrating these two Dirac materials in a single device creates interesting opportunities for exploring new physics of interacting massless Dirac fermions. Here we report on a practical route to experimental fabrication of graphene-Sb2Te3heterostructure. The graphene-TI heterostructures are prepared by using a dry transfer of chemical-vapor-deposition grown graphene film. ARPES measurements confirm the coexistence of topological surface states of Sb2Te3and Dirac 7rbands of graphene, and identify the twist angle in the graphene-TI heterostructure. The results suggest a potential tunable electronic platform in which two different Dirac low-energy states dominate the transport behavior.

Background: Nicotine dependence (ND) is a key construct that organizes physiological and behavioral symptoms associated with persistent nicotine intake. Measurement of ND has focused primarily on cigarette smokers. Thus, validation of brief instruments that apply to a broad spectrum of tobacco product users is needed. Methods: We examined multiple domains of ND in a longitudinal national study of the United States population, the United States National Epidemiological Survey of Alcohol and Related Conditions (NESARC). We used methods based in item response theory to identify and validate increasingly brief measures of ND that included symptoms to assess ND similarly among cigarette, cigar, smokeless, and poly tobacco users. Results: Confirmatory factor analytic models supported a single, primary dimension underlying symptoms of ND across tobacco use groups. Differential Item Functioning (DIF) analysis generated little support for systematic differences in response to symptoms of ND across tobacco use groups. We established significant concurrent and predictive validity of brief 3- and 5-symptom indices for measuring ND. Conclusions: Measuring ND across tobacco use groups with a common set of symptoms facilitates evaluation of tobacco use in an evolving marketplace of tobacco and nicotine products.

This paper describes and explains details of the design, production and packaging of a counterfunctional device: The Obscura 1C Digital Camera. We further describe a small-scale distribution of Obscura 1C packages into everyday contexts. The paper then reflects on the various types of conceptual, imaginary and firsthand uses made of the Obscura 1C. These include its uses for everyday audiences as a unique camera and as a conceptually usable device. But we also prioritize uses particular to the HCI and design audience. These include using the Obscura 1C to articulate the concepts of inhibitive interfaces, counterfunctionality, and enabling limitations. The Obscura 1C is further used to articulate how abstract ideas can be translated into material forms, to rethink the role of packaging in user studies, and to draw attention to how discursive design objects are packaged and presented.

This paper presents a set of design studies and discussions investigating new possibilities in designing digital limitations. Focusing on digital photography as a medium, we present design prototypes and experiments including Ultra-Low Resolution Displays, Inaccessible Cameras, and a set of point-and-shoot digital camera variants. Our design work is based on the concept of a counterfunctional thing-a thing that figuratively counters some of its own functionality. We present the concept of counterfunctionality as a way of approaching the design of interactive technology. In conclusion we connect our work with critical discourses surrounding technology and the value of designing limitations. Copyright © 2014 ACM.

Objective: California's comprehensive tobacco control programme was 13 years old in 2002; by then, children entering adolescence at the start of the programme were young adults. This study examines whether adolescent smoking declined over this period, whether any decline carried through to young adulthood, and whether it was specific to California. Setting and participants: Most data were from the 1990-2002 California Tobacco Surveys ( CTS) ( adolescents 12-17 years,. 5000/survey, young adults 18-24 years,. 1000/survey). Additional data were from the national 1992/93-2001/02 Current Population Survey ( CPS) ( young adults 18-24 years,. 15000/survey). Results: Over the 13 year period in California, ever puffing declined by 70% in 12-13 year olds, by 53% in 14-15 year olds from 1992-2002, and by 34% in 16-17 year olds from 1996-2002 ( CTS). As noted, the decline commenced progressively later in each older group. Smoking experimentation ( 1+ cigarettes) and established smoking (. 100 cigarettes in lifetime) showed similar patterns. Compared to 1990, the percentage of California young adults ( CTS data) who ever experimented declined by 14%, with half of the decline from 1999-2002. CPS young adult smoking prevalence ( established and now smoke everyday or some days) was constant in the rest of the USA over the entire period, but California showed a recent 18% decline from 1998/99 to 2001/02. Conclusions: California's comprehensive programme may have kept new adolescent cohorts from experimenting with cigarettes. Low young adolescent experimentation rates at programme start appeared to carry through to young adulthood, resulting in a recent drop in young adult smoking prevalence in California not observed in the rest of the USA.

Objective: Recently, the tobacco industry has focused marketing efforts on young adults through bar and club promotions, such as advertising and distribution of free cigarettes in these settings. This study estimates the fraction of the California young adult population that might be exposed and potentially influenced by these efforts. Design and participants: Data were from 9364 young adult ( 18-29 years) respondents to the cross sectional population based 2002 California Tobacco Survey. As background, we analysed social smoking ( only smoke with other smokers), and enjoyment of smoking while drinking. Our main focus was on bar and club attendance, what was observed in bars and clubs, and how this might differ according to respondents' risk for future smoking. Results: Social smokers comprised 30.0 ( 2.2)% of all current smokers, including experimenters. Nearly three quarters ( 74.5 ( 2.3)%) of current smokers/experimenters said they enjoyed smoking while drinking. About one third ( 33.8 ( 1.2)%) of all young adults said they attended bars and clubs at least sometimes; attendance was significantly higher among smokers and those at risk for future smoking. Close to 60% ( 57.9 ( 2.2)%) of bar and club attenders reported seeing cigarette advertising and promotions in these settings. Again, smokers and those at risk were more likely to report seeing such advertising and promotions in these settings. Conclusions: About 20% of all young adults and about 30% of those at risk for future smoking ( including current smokers) were exposed to tobacco advertising and promotions in bars and clubs. These California results may be conservative, but nonetheless indicate that the group potentially influenced is sizable.

Background: The decade long California Tobacco Control Program is unique to the nation in its duration, emphasis, and level of funding. Programme emphasis is on changing social norms about smoking as a means to discourage smoking and thus reduce the harmful health effects of tobacco to the population. Methods: Data from the 1992 - 93, 1995 - 96, and 1998 - 99 Tobacco Use Supplements to the national Current Population Survey (n> 175 000 each period) were used to examine changes in norms regarding where smoking should "not be allowed at all'' in both California and in the rest of the USA. Venues queried were restaurants, hospitals, work areas, bars, indoor sports venues, and indoor shopping malls. Results: There were substantial increases in the percentages of the adult population (18+ years) stating that smoking should not be allowed in the venues queried in California by 1998 - 99 compared to 1992 - 93; only modest increases were observed in the rest of the USA. In fact, for most venues, the percentages for the rest of the USA were lower in 1998 - 99 than in California in 1992 - 93. Further, the percentage increase over this period in respondents stating that smoking should not be allowed in four or more of the six venues was 30% in California and 23% in the rest of the USA. The most dramatic percentage increase in California occurred among current smokers (93%). Conclusions: A strong, comprehensive tobacco control programme such as California's can influence population norms, including those of smokers, with respect to where smoking should not be allowed.