Explore the vast range of titles available.

The broadening of atomic emission lines by high-velocity motion of gas near accreting supermassive black holes is an observational hallmark of quasars 1 . Observations of broad emission lines could potentially constrain the mechanism for transporting gas inwards through accretion disks or outwards through winds 2 . The size of regions for which broad emission lines are observed (broad-line regions) has been estimated by measuring the delay in light travel time between the variable brightness of the accretion disk  continuum and the emission lines 3 —a method known as reverberation mapping. In some models the emission lines arise from a continuous outflow 4 , whereas in others they arise from orbiting gas clouds 5 . Directly imaging such regions has not hitherto been possible because of their small angular size (less than 10 −4 arcseconds 3 , 6 ). Here we report a spatial offset (with a spatial resolution of 10 −5 arcseconds, or about 0.03 parsecs for a distance of 550 million parsecs) between the red and blue photo-centres of the broad Paschen-α line of the quasar 3C 273 perpendicular to the direction of its radio jet. This spatial offset corresponds to a gradient in the velocity of the gas and thus implies that the gas is orbiting the central supermassive black hole. The data are well fitted by a broad-line-region model of a thick disk of gravitationally bound material orbiting a black hole of 3 × 10 8 solar masses. We infer a disk radius of 150 light days; a radius of 100–400 light days was found previously using reverberation mapping 7 – 9 . The rotation axis of the disk aligns in inclination and position angle with the radio jet. Our results support the methods that are often used to estimate the masses of accreting supermassive black holes and to study their evolution over cosmic time. High-angular-resolution observations of the quasar 3C 273 reveal that it has a relatively small but thick disk, viewed nearly face-on, in which material is orbiting the central supermassive black hole.

New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic photon sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov and scintillation signals. Such a detector could reconstruct particle direction and species using Cherenkov light while also having the excellent energy resolution and low threshold of a scintillator detector. Situated deep underground, and utilizing new techniques in computing and reconstruction, this detector could achieve unprecedented levels of background rejection, enabling a rich physics program spanning topics in nuclear, high-energy, and astrophysics, and across a dynamic range from hundreds of keV to many GeV. The scientific program would include observations of low- and high-energy solar neutrinos, determination of neutrino mass ordering and measurement of the neutrino CP-violating phase δ , observations of diffuse supernova neutrinos and neutrinos from a supernova burst, sensitive searches for nucleon decay and, ultimately, a search for neutrinoless double beta decay, with sensitivity reaching the normal ordering regime of neutrino mass phase space. This paper describes Theia , a detector design that incorporates these new technologies in a practical and affordable way to accomplish the science goals described above.

Extant research has largely ignored the phenomenon of interorganizational teams, which consist of members from both supplier and customer companies. This study examines the degree to which team interorganizationality influences team performance in a business-to-business context. On the basis of resource-dependence theory and boundary theory, the author argues that team interorganizationality positively influences team effectiveness, particularly when uncertainty is high. The hypotheses testing is based on multiple informant data collected from members and leaders of 225 teams in various industries. The results show the positive influence of team interorganizationality on team effectiveness. In addition, uncertainty-related moderator variables (company-related, market-related, and technological uncertainty) strengthen the link between team interorganizationality and team effectiveness. [PUBLICATION ABSTRACT]

Although it has frequently been argued that the job satisfaction of a company's employees is an important driver of customer satisfaction, systematic research exploring this link is scarce. The present study investigates this relationship for salespeople in a business-to-business context. The theoretical justification for a positive impact of salespeople's job satisfaction on customer satisfaction is based on the concept of emotional contagion. The analysis is based on a dyadic data set that involves judgments provided by salespeople and their customers collected across multiple manufacturing and services industries. Results indicate the presence of a positive relationship between salespeople's job satisfaction and customer satisfaction. Furthermore, the relationship between salespeople's job satisfaction and customer satisfaction is found to be particularly strong in the case of high frequency of customer interaction, high intensity of customer integration into the value-creating process, and high product/service innovativeness. [PUBLICATION ABSTRACT]

The goal of this article is to provide deeper insights into the construct of customer orientation at the individual level. The article has three main objectives: First, this study provides a two-dimensional conceptualization of customer orientation that distinguishes between attitudes and behaviors. Second, it explores direct and indirect effects of customer-oriented attitudes on customer satisfaction. Third, the authors propose and examine a positive moderating effect of empathy, reliability, and expertise on the link between customer-oriented attitude and customer-oriented behavior and a negative moderating effect of salespeople's restriction in job autonomy. The analysis is based on dyadic data that involve judgments provided by salespeople and their customers across multiple manufacturing and services industries in a business-to-business context. Results support the authors' two-dimensional conceptualization of customer orientation. The authors also find that customer-oriented attitudes have a direct effect on customer satisfaction. The four proposed moderating effects are also in evidence. [PUBLICATION ABSTRACT]

New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic photon sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov and scintillation signals. Such a detector could exploit these two distinct signals to observe particle direction and species using Cherenkov light while also having the excellent energy resolution and low threshold of a scintillator detector. Situated in a deep underground laboratory, and utilizing new techniques in computing and reconstruction techniques, such a detector could achieve unprecedented levels of background rejection, thus enabling a rich physics program that would span topics in nuclear, high-energy, and astrophysics, and across a dynamic range from hundreds of keV to many GeV. The scientific program would include observations of low- and high-energy solar neutrinos, determination of neutrino mass ordering and measurement of the neutrino CP violating phase, observations of diffuse supernova neutrinos and neutrinos from a supernova burst, sensitive searches for nucleon decay and, ultimately, a search for NeutrinoLess Double Beta Decay (NLDBD) with sensitivity reaching the normal ordering regime of neutrino mass phase space. This paper describes Theia, a detector design that incorporates these new technologies in a practical and affordable way to accomplish the science goals described above. We consider two scenarios, one in which Theia would reside in a cavern the size and shape of the caverns intended to be excavated for the Deep Underground Neutrino Experiment (DUNE) which we call Theia 25, and a larger 100 ktonne version (Theia 100) that could achieve an even broader and more sensitive scientific program.

Although school-based health care programs (SBHCPs) provide affordable and accessible health care to children and adolescents and are known to improve school attendance, a variety of barriers affect their development. Focus groups were conducted in three schools in Louisiana to demonstrate how barriers can affect the initiation and development of SBHCPs. Each school-based program was in a different stage of development. Identifying potential barriers and developing strategies to overcome them can enhance already existing SBHCPs and make it easier for new programs to begin. The social worker serves as an important ally in the development of SBHCPs and is a necessary part of the school-based health care team.

A number of recent research studies have demonstrated the presence of a positive link between customer‐contact employees' work satisfaction and customer satisfaction. However, existing studies have largely neglected describing conditions under which the link between these two constructs is stronger or weaker. The authors of this study argue that certain customer characteristics (such as customer trust, customer price consciousness, and the importance of product/service to the customer) and salesperson characteristics (such as empathy, expertise, and reliability) moderate the relationship between salespeople's work satisfaction and customer satisfaction. Balance theory is used to justify the hypotheses of the study. Tests of the hypotheses are based on a dyadic data set collected across manufacturing and services industries in a business‐to‐business context. Results reveal that the link between work satisfaction and customer satisfaction is systematically moderated by the salesperson and customer characteristics under consideration. © 2005 Wiley Periodicals, Inc.

The broadening of atomic emission lines by high-velocity motion of gas near accreting supermassive black holes is an observational hallmark of quasars. Observations of broad emission lines could potentially constrain the mechanism for transporting gas inwards through accretion disks or outwards through winds. The size of this broad-line region has been estimated by measuring the light travel time delay between the variable nuclear continuum and the emission lines - a method known as reverberation mapping. In some models the emission lines arise from a continuous outflow, whereas in others they are produced by orbiting gas clouds. Directly imaging such regions has not hitherto been possible because of their small angular sizes (< 0.1 milli-arcseconds). Here we report a spatial offset (with a spatial resolution of ten micro-arcseconds or about 0.03 parsecs for a distance of 550 million parsecs) between the red and blue photo-centres of the broad Paschen-{\\alpha} line of the quasar 3C 273 perpendicular to the direction of its radio jet. This spatial offset corresponds to a gradient in the velocity of the gas and thus implies that the gas is orbiting the central supermassive black hole. The data are well fitted by a broad-line-region model of a thick disk of gravitationally bound material orbiting a black hole of 300 million solar masses. We infer a disk radius of 150 light days; a radius of 100-400 light days was found previously using reverberation mapping. The rotation axis of the disk aligns in inclination and position angle with the radio jet. Our results support the methods that are often used to estimate the masses of accreting supermassive black holes and to study their evolution over cosmic time.