Localization-dependent charge separation efficiency at an organic/inorganic hybrid interface

By combining complementary optical techniques, photoluminescence and time-resolved excited state absorption, we achieve a comprehensive picture of the relaxation processes in the organic/inorganic hybrid system SP6/ZnO. We identify two long-lived excited states of the organic molecules of which only the lowest energy one, localized on the sexiphenyl backbone of the molecule, is found to efficiently charge separate to the ZnO conduction band or radiatively recombine. The other state, most likely localized on the spiro-linked biphenyl, relaxes only by intersystem crossing to a long-lived, probably triplet state, thus acting as a sink of the excitation and limiting the charge separation efficiency.Comment: 6 pages, 5 figure

Predictors of Employment Growth and Unemployment in U.S. Central Cities, 1990-2010

This paper considers employment growth and unemployment from 1990-2010 in a cross-section of cities in light of practical tools that city governments have at their disposal to provide relief. In particular, I test educational attainment (both initial levels and growth over time) and public capital investment as influences on job growth and changes in unemployment rates in 83 central cities in the United States. Change in educational attainment over time is suggestive of causing higher job growth and lower unemployment. The implication is that initiatives to attract and retain college-educated professionals and investments in increasing college attainment among incumbent residents have the potential to reduce joblessness and improve social welfare. Despite some evidence that public capital outlays led to employment growth and reduced unemployment in the 1990s, the overall association between capital outlays and labor market health is weak. Intergovernmental spending as part of the American Recovery and Reinvestment Act (ARRA), however, was found to have a positive effect on unemployment rates in 2009 and 2010. A relatively weak correlation between the two dependent variables used in the analysis—employment growth and unemployment rates—underscores the mitigating roles of migration and labor force participation in translating job creation into employment growth for members of the unemployed population

Up-Zoning New York City’s Mixed Use Neighborhoods : Property-Led Economic Development and the Anatomy of a Planning Dilemma

This article examines land use policy and real estate market activity in the 1990s in two mixed use industrial neighborhoods on New York City\u27s East River. Based on case studies of Greenpoint-Williamsburg in Brooklyn and Long Island City in Queens, it finds that a strong adherence on the part of public officials to the principle of highest and best use, together with an incremental approach to planning and land use regulation, has contributed to opportunistic development and industrial displacement in these areas. The question of whether this trajectory is in the interests of the public as a whole remains the subject of fierce debate in the city\u27s planning community and beyond. The article contributes to the literature on property-led economic development in central cities by engaging with the complex task of planners charged with regulating areas that not only are logical sites for commercial and residential expansion but which also serve as niches for lower yielding uses such as light industry

Beyond the First Job: Career Ladder Initiatives in Information Technology Industries

In the past two decades, major growth drivers in the U.S. economy have included computers and software, information content such as broadcast entertainment, and advanced services and manufacturing that rely on information technology. This is particularly true in leading metropolitan agglomerations, where synergies between the global reach of communications systems and the local intensity of face-to-face communication are crucial to getting the most out of talent, entrepreneurial creativity, and productivity (Graham and Marvin 1996; Hall 1999; Sassen 2001). The polarity between information haves and have-nots in the most dynamic urban centers is stark, however. The digital divide creates or reinforces cultural distance among people who are geographically within a few miles of one another (Mitchell 1999; Servon 2002). Significantly, since it has as much to do with earning power as with access to information, the divide also reinforces income disparities among urbanites (Schön 1999; Hall 1999; National Telecommunications and Information Administration 2000)

Information Technology and Urban Labor Markets in the United States

The technologies that now dominate the production of goods and services, especially in advanced industrialized countries, have irrevocably changed the dynamics of the demand for and return to labor. Employment in technology-intensive occupations such as computer programming and network technology has increased at double the rate of US non-farm employment overall since the mid-1990s (US Department of Commerce, 2000), and thousands of other jobs in offices, factories and retail establishments demand technological infrastructures unneeded ten years ago. The ability to manipulate information, and to service and maintain the delivery systems by which information travels among users, has become increasingly linked to earning power. This is particularly true in cities. According to Rondinelli et al., the basis of urban economic development is now \u27a technology- and knowledge-based system of production and services\u27 (1998: 83) and those without the skills to participate in this system are confined to secondary, futureless roles in urban economies

Reading rival union responses to the localization of technical work in the US telecommunications industry

Between the early 1970s and the late 1990s, the market repercussions of state deregulation, combined with technological change, sparked profound changes for employees in the heretofore highly unionized US telecommunications sector. The wholesale restructuring of the AT&T Bell System and the growth of competitor firms\u27 market share led to declines in union density, yawning wage disparities among people doing similar work, and increased casualization and insecurity for holders of both customer service and technical jobs in the industry. However, these trends have manifested themselves somewhat differently for customer service and technical workers. While employers have typically followed a strategy of consolidating and regionalizing customer service and clerical labor, a significant amount of technical work, specifically the installation and maintenance of telecommunications infrastructure on customers\u27 premises, has grown more fragmented, structured by local labor market conditions and institutions (see Batt and Keefe 1999, Keefe and Batt 2002)

Milwaukee Parental Choice Program: Descriptive Report on Participating Schools 2010–11

This report is the fifth in a series of annual reports produced by the School Choice Demonstration Project (SCDP) that will provide descriptive information about the schools participating in the Milwaukee Parental Choice Program (MPCP)

Investigating the relationship between interoceptive accuracy, interoceptive awareness, and emotional susceptibility

Interoception, the sense of the physiological condition of the body, provides a basis for subjective feelings and emotions. Anterior insular cortex activity represents the state of the body and varies according to personality traits, such as emotional susceptibility (ES)-the tendency to experience feelings of discomfort and vulnerability when facing emotionally-laden stimuli. The accuracy of perceiving one's own bodily signals, or interoceptive accuracy (IAc), can be assessed with the heartbeat perception task (HPT), which is the experimental measure used by most of the existing research on interoception. However, IAc is only one facet of interoception. Interoceptive awareness (IAw) is the conscious perception of sensations from inside the body, such as heart beat, respiration, satiety, and the autonomic nervous system sensations related to emotions, which create the sense of the physiological condition of the body. We developed an Italian version of the recent self-report Multidimensional Assessment of Interoceptive Awareness (MAIA), tested its psychometric properties (reliability, dimensionality, and construct validity), and examined its relationship to ES, as assessed using the Emotional Susceptibility Scale, in a sample (n = 321) of healthy Italian psychology students (293 females, mean age: 20.5 years). In a subgroup of females (n = 135), we measured IAc with the HPT. We used a series of correlation/regression analyses to examine the complex interplay between the three constructs. We provide further evidence for a substantial independence of the IAc and IAw measures, confirming previous reports and current theoretical models that differentiate between IAc and IAw. Our analyses elucidate the complex relationship between distinct dimensions of IAw and ES, highlighting the need for continued efforts to shed more light on this topic