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- Aaron, F. D., et al.
(author)
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Measurement of the inclusive e(+/-) p scattering cross section at high inelasticity y and of the structure function F-L
- 2011
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In: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 71:3
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Journal article (peer-reviewed)abstract
- A measurement is presented of the inclusive neutral current e(+/-) p scattering cross section using data collected by the H1 experiment at HERA during the years 2003 to 2007 with proton beam energies E-p of 920, 575, and 460 GeV. The kinematic range of the measurement covers low absolute four-momentum transfers squared, 1.5 GeV2 < Q(2) < 120 GeV2, small values of Bjorken x, 2.9 . 10(-5) < x < 0.01, and extends to high inelasticity up to y = 0.85. The structure function F-L is measured by combining the new results with previously published H1 data at E-p = 920 GeV and E-p = 820 GeV. The new measurements are used to test several phenomenological and QCD models applicable in this low Q(2) and low x kinematic domain.
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- Nimmo, K., et al.
(author)
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A burst storm from the repeating FRB 20200120E in an M81 globular cluster
- 2023
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 520:2, s. 2281-2305
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Journal article (peer-reviewed)abstract
- The repeating fast radio burst (FRB) source FRB 20200120E is exceptional because of its proximity and association with a globular cluster. Here we report 60 bursts detected with the Effelsberg telescope at 1.4 GHz. We observe large variations in the burst rate, and report the first FRB 20200120E 'burst storm', where the source suddenly became active and 53 bursts (fluence ≥0.04 Jy ms) occurred within only 40 min. We find no strict periodicity in the burst arrival times, nor any evidence for periodicity in the source's activity between observations. The burst storm shows a steep energy distribution (power-law index α = 2.39 ± 0.12) and a bimodal wait-time distribution, with log-normal means of 0.94+0.07−0.06 s and 23.61+3.06−2.71 s. We attribute these wait-time distribution peaks to a characteristic event time-scale and pseudo-Poisson burst rate, respectively. The secondary wait-time peak at ∼1 s is ∼50 × longer than the ∼24 ms time-scale seen for both FRB 20121102A and FRB 20201124A - potentially indicating a larger emission region, or slower burst propagation. FRB 20200120E shows order-of-magnitude lower burst durations and luminosities compared with FRB 20121102A and FRB 20201124A. Lastly, in contrast to FRB 20121102A, which has observed dispersion measure (DM) variations of ΔDM > 1 pc cm−3 on month-to-year time-scales, we determine that FRB 20200120E's DM has remained stable (ΔDM < 0.15 pc cm−3) over >10 months. Overall, the observational characteristics of FRB 20200120E deviate quantitatively from other active repeaters, but it is unclear whether it is qualitatively a different type of source.
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| 10. |
- Kostanski, Sarah, et al.
(author)
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Navigating Changing Dynamics and Control Over the Work-Nonwork Boundary
- 2024
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In: Academy of Management Annual Meeting Proceedings. - : Academy of Management. - 0065-0668.
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Conference paper (peer-reviewed)abstract
- The growing digitalization of work tasks and processes, increasing use of texts and emails, and the rise of hybrid and remote work have amplified growing tensions over work and nonwork boundaries. For example, employees and employers are increasingly navigating control over the work-nonwork nexus, which are rapidly shifting and blurring. Issues such as how to implement hybrid and remote work, when and how employees take breaks, availability during work and nonwork hours, control over work schedules and overwork, and aligning expectations and attributions between organizations and employees illustrate growing challenges. Unfortunately, research on work practices both formal (e.g., telework, work schedule policies) and informal (e.g., after hours email, text availability) and employee and organizational experiences related to the work-nonwork boundary is scattered, across the complex issues noted above. Moreover synergistic theoretical views on boundary management, job design, gender, flexibility, management control, and well -being and recovery are not well-integrated nor are and macro and micro perspectives. Divergence in boundary practices across different occupations, cultures, employers, and individuals has further obfuscated this literature. Consequentially, scholarship on the work-nonwork boundary has become a siloed literature that addresses boundary challenges in a piecemeal and ad hoc fashion. The goal of this symposium is to integrate and advance understanding regarding the changing dynamics and control over the work-nonwork boundary as a critical future of work issue. The papers in this symposium highlight the many ways the work-life boundary (e.g., cognitive, emotional, physical, time) is in flux, and has had to be renegotiated and redefined for employees and employers across many issues, stakeholders, and contexts. By integrating a rich range of employer and employee challenges being affected by the changing dynamics of work-nonwork boundaries and bringing together varied theoretical lenses and diverse perspectives, this symposium is able to address tensions and challenges in modern boundary management.
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| 11. |
- Marazioti, Antonia, et al.
(author)
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KRAS signaling in malignant pleural mesothelioma
- 2022
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In: EMBO Molecular Medicine. - : EMBO. - 1757-4684 .- 1757-4676. ; 14:2
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Journal article (peer-reviewed)abstract
- Malignant pleural mesothelioma (MPM) arises from mesothelial cells lining the pleural cavity of asbestos-exposed individuals and rapidly leads to death. MPM harbors loss-of-function mutations in BAP1, NF2, CDKN2A, and TP53, but isolated deletion of these genes alone in mice does not cause MPM and mouse models of the disease are sparse. Here, we show that a proportion of human MPM harbor point mutations, copy number alterations, and overexpression of KRAS with or without TP53 changes. These are likely pathogenic, since ectopic expression of mutant KRASG12D in the pleural mesothelium of conditional mice causes epithelioid MPM and cooperates with TP53 deletion to drive a more aggressive disease form with biphasic features and pleural effusions. Murine MPM cell lines derived from these tumors carry the initiating KRASG12D lesions, secondary Bap1 alterations, and human MPM-like gene expression profiles. Moreover, they are transplantable and actionable by KRAS inhibition. Our results indicate that KRAS alterations alone or in accomplice with TP53 alterations likely play an important and underestimated role in a proportion of patients with MPM, which warrants further exploration.
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- Salomonsson, F., et al.
(author)
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Wafer fused p-InP/p-GaAs heterojunctions
- 1998
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In: Journal of Applied Physics. - 0021-8979 .- 1089-7550. ; 83:2, s. 768-774
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Journal article (peer-reviewed)abstract
- This article reports on the fabrication and characterization of wafer fused heterojunctions between p-InP and p-GaAs. Secondary ion mass spectroscopy was used to characterize doping profiles across the interface as well as the interface contamination with oxygen or carbon. The crystalline quality of the fused material was characterized using cross section and plan-view transmission electron microscopy. The electrical properties of the fused interface were studied as a function of various doping elements such as Be and Zn in InP or Zn and C in GaAs as well as for different acceptor concentrations in GaAs. Finally, the electrical characteristics were analyzed using a numerical model that includes thermionic emission and tunneling across the heterobarrier. © 1998 American Institute of Physics.
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