DNA Strand Breaks Induced by 0–4 eV Electrons: The Role of Shape Resonances

Collisions of 0– 4 eV electrons with thin DNA films are shown to produce single strand breaks. The yield is sharply structured as a function of electron energy and indicates the involvement of π* shape resonances in the bond breaking process. The cross sections are comparable in magnitude to those observed in other compounds in the gas phase in which π* electrons are transferred through the molecule to break a remote bond. The results therefore support aspects of a theoretical study by Barrios et al. [J. Phys. B 106, 7991 (2002)] indicating that such a mechanism could produce strand breaks in DN

DNA Strand Breaks Induced by 0–4 eV Electrons: The Role of Shape Resonances

Collisions of 0– 4 eV electrons with thin DNA films are shown to produce single strand breaks. The yield is sharply structured as a function of electron energy and indicates the involvement of π* shape resonances in the bond breaking process. The cross sections are comparable in magnitude to those observed in other compounds in the gas phase in which π* electrons are transferred through the molecule to break a remote bond. The results therefore support aspects of a theoretical study by Barrios et al. [J. Phys. B 106, 7991 (2002)] indicating that such a mechanism could produce strand breaks in DN

COVID-19 among guestworkers in Norway

Gjestearbeidere i Norge er en gruppe vi har lite kunnskap om, til tross for at de i perioder av et normalår utgjør nesten 4 % av alle sysselsatte. Under pandemien har denne gruppen vært gjenstand for kraftige smitteverntiltak, men det har manglet kunnskap om hvorvidt smitteforekomsten var høyere enn blant norskfødte. I denne analysen kartlegger vi om sannsynligheten for påvist smitte med covid-19 blant gjestearbeidere var høyere enn i en tilsvarende sammenligningsgruppe i den norske populasjonen. En gjestearbeider er en ikke-bosatt arbeidsinnvandrer med et midlertidig identitetsnummer og et nylig oppstartet arbeidsforhold. Mangel på kunnskap, rapporter om høy smitteforekomst blant innvandrere generelt og vanskelig tilgjengelige data kan ha bidratt til en forventing om at ikke-bosatte arbeidsinnvandrere var en gruppe med særskilt høy smittesannsynlighet. I analysen sammenligner vi registrert smitte blant bosatte og ikke-bosatte med nylig oppstartet arbeidsforhold i Aa-registeret fra 1. april 2020 til 1. oktober 2021, inkludert kontroller for kjønn, alder, yrke og lokalt smittetrykk. Vi finner lavere påvist insidens av covid-19 blant gjestearbeidere enn i sammenligningsgruppen, og ingen forskjell i testpositivitet.COVID-19 among guestworkers in NorwaypublishedVersio

Campus Vol IX N 1

Howard Studio. Miss Barbara Rasor . Picture. 2. Shaw, Ted. Cover. Picture. 1. McIntosh, Bruce. Untitled. Cartoon. 4. Hostetler, Diane. Adamant Evening . Prose. 5. Meese, Dorothy. Adamant Evening . Picture. 5. Anonymous. Whom Not to Invite . Prose. 7. Ladd, Clyde and Don Duck Shackelford. What Are These People Saying? . Picture. 8. Umphrey, Shirley. A Year In France . Prose. 10. Sparian. Untitled. Cartoon. 11.; Anonymous. Untitled. Prose. 11. Martin, Lyn. The Birth of a Broadcasting Station . Shaw, Ted. Freud . Cartoon. 12. Bowman, Jim. A Clear Conscience . Prose. 13. Freer, Tom and Buzz Peek. The Pigskin Parade . Prose. 15. Anonymous. Untitled. Cartoon. 16. Aabye, Nancy. Resentment . Poem. 17. Hunting, John. Another Tree, Another Hill . Poem. 17. Miller, John N. Advice From the Mermaid . Poem. 17. Newman, Brian. Untitled. Cartoon. 17. Aabye, Nancy. The Poem . Poem. 17. McIntosh, Bruce. Untitled. Cartoon. 17. Anonymous. Untitled. Prose. 18. Wampus. Untitled. Cartoon. 18. Anonymous. Untitled. Prose. 19. Schackelford, Don Duck and Ted Shaw. Untitled. Cartoon. 19. Shaw, Ted. Untitled. Cartoon. 19

Toward Cognitive Assistance and Prognosis Systems in Power Distribution Grids

In recent times, both geopolitical challenges and the need to counteract climate change have led to an increase in generated renewable energy as well as an increased demand for clean electrical energy. The resulting variability of electricity production and demand as well as an overall demand increase, put additional stress on the existing grid infrastructure. This leads to strongly increased maintenance demands for distribution system operators (DSOs). Today, condition monitoring is used to address these challenges. Researchers have already explored solutions for monitoring critical assets like switchgear and circuit breakers. However, with a shrinking knowledgeable technical workforce and increasing maintenance requirements, mere monitoring is insufficient. Already today, DSOs ask for actionable recommendations, optimization strategies, and prioritization methods to manage the growing task backlog effectively. In this paper we propose a vision of a grid-level cognitive assistance system that translates the outcome of diagnosis and prognosis systems into actionable work tasks for the grid operator. The solution is highly interdisciplinary and based on empirical studies of real-world requirements. We also describe the related work relevant to the multi-disciplinary aspects and summarize the research gaps that need to be closed over the next years

Towards Cognitive Assistance and Prognosis Systems in Power Distribution Grids - Open Issues, Suitable Technologies, and Implementation Concepts

In recent times, both geopolitical challenges and the need to counteract climate change have led to an increase in generated renewable energy as well as an increased demand for clean electrical energy. The resulting variability of electricity production and demand as well as an overall demand increase, put additional stress on the existing grid infrastructure. This leads to strongly increased maintenance demands for distribution system operators (DSOs). Today, condition monitoring is used to address these challenges. Researchers have already explored solutions for monitoring critical assets like switchgear and circuit breakers. However, with a shrinking knowledgeable technical workforce and increasing maintenance requirements, mere monitoring is insufficient. Already today, DSOs ask for actionable recommendations, optimization strategies, and prioritization methods to manage the growing task backlog effectively. In this paper we propose a vision of a grid-level cognitive assistance system that translates the outcome of diagnosis and prognosis systems into actionable work tasks for the grid operator. The solution is highly interdisciplinary and based on empirical studies of real-world requirements. We also describe the related work relevant to the multi-disciplinary aspects and summarize the research gaps that need to be closed over the next years

Wire Marking Results in a Small but Significant Reduction in Avian Mortality at Power Lines: A BACI Designed Study

10 paginas, 4 figuras y 4 tablesBackground: Collision with electric power lines is a conservation problem for many bird species. Although the implementation of flight diverters is rapidly increasing, few well-designed studies supporting the effectiveness of this costly conservation measure have been published. Methodology/Principal Findings: We provide information on the largest worldwide marking experiment to date, including carcass searches at 35 (15 experimental, 20 control) power lines totalling 72.5 km, at both transmission (220 kV) and distribution (15 kV-45 kV) lines. We found carcasses of 45 species, 19 of conservation concern. Numbers of carcasses found were corrected to account for carcass losses due to removal by scavengers or being overlooked by researchers, resulting in an estimated collision rate of 8.2 collisions per km per month. We observed a small (9.6%) but significant decrease in the number of casualties after line marking compared to before line marking in experimental lines. This was not observed in control lines. We found no influence of either marker size (large vs. small spirals, sample of distribution lines only) or power line type (transmission vs. distribution, sample of large spirals only) on the collision rate when we analyzed all species together. However, great bustard mortality was slightly lower when lines were marked with large spirals and in transmission lines after marking. Conclusions: Our results confirm the overall effectiveness of wire marking as a way to reduce, but not eliminate, bird collisions with power lines. If raw field data are not corrected by carcass losses due to scavengers and missed observations, findings may be biased. The high cost of this conservation measure suggests a need for more studies to improve its application, including wire marking with non-visual devices. Our findings suggest that different species may respond differently to marking, implying that species-specific patterns should be explored, at least for species of conservation concern.We thank A. Garcıa Fernandez and M. Carrasco for their assistance during the field work. We also thank J. Camaño and J. Velasco of HENARSA, and the electric companies Iberdrola, Union Fenosa and Red Electrica de España for their cooperation. S. Young reviewed the English. RB was contracted within the project CGL2008-02567 of the Direccion General de Investigacion, Spanish Ministry of Science and Innovation and later supported by a postdoctoral grant from Junta de Comunidades de Castilla-La Mancha. C. Ponce, C. Palacın, CM and BM were supported by contracts CSICHENARSA. This study was carried out within the Preventive, corrective and compensatory measures to balance the impact of the M-50 and R-2 highways on the population of great bustards and other steppe-land birds in the Important Bird Area Talamanca-Camarma and the Site of Community Importance Cuenca de los rıos Jarama y Henares, supported by a contract HENARSA-CSIC. Additional financial support was provided by project GL2008-02567 of the Direccion General de Investigacion, Spanish Ministry of Science and Innovation. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Peer reviewe

Empirical Legal Studies Before 1940: A Bibliographic Essay

The modern empirical legal studies movement has well-known antecedents in the law and society and law and economics traditions of the latter half of the 20th century. Less well known is the body of empirical research on legal phenomena from the period prior to World War II. This paper is an extensive bibliographic essay that surveys the English language empirical legal research from approximately 1940 and earlier. The essay is arranged around the themes in the research: criminal justice, civil justice (general studies of civil litigation, auto accident litigation and compensation, divorce, small claims, jurisdiction and procedure, civil juries), debt and bankruptcy, banking, appellate courts, legal needs, legal profession (including legal education), and judicial staffing and selection. Accompanying the essay is an extensive bibliography of research articles, books, and reports