bluuebunny/crossref_metadata_2025_split huggingface dataset:
Aerodynamic analysis of a stator‐augmented linear cascade wind turbine
Authors: Jafari Seyed Amir Hosein , Kwok Kenny C.S. , Safaei Farzad , Kosasih Buyung , Zhao Ming 
Published: April 2019

AbstractThis study proposes to attach stator vanes to PowerWindow, a linear cascade wind turbine, to improve the flow direction in the device. By controlling the angle of attack, the stator vanes increase the acting force and decrease the undesirable force on PowerWindow blades. An analytical model using blade element momentum theory is developed for the new configuration, referred to as stator‐augmented PowerWindow. The analytical model has been verified by a computational fluid dynamic simulation. This study shows that the stator vanes are able to minimize/neutralize the undesirable axial force on PowerWindow so that the thrust coefficient decreases from 0.035 in the original model to −0.005 in the stator‐augmented one. In addition, by increasing the acting force on the blades, the stator augmentation will simultaneously enhance the coefficient of performance by up to 10%. This study also shows that by using stator vanes to control the angle of attack, unlike in the original PowerWindow, the direction of rotation of the stator‐augmented PowerWindow will remain the same regardless of the wind direction, increasing the utility of the device in practice.
The Changing Roles of Academic Leaders: Decision-Making, Power, and Performance
Authors: Geschwind Lars , Aarrevaara Timo , Berg Laila Nordstrand , Lind Jonas Krog 
Published: April 2019

AbstractMajor reforms in the Nordic countries have increased the formal autonomy of higher education institutions (HEIs) to make decisions over their own activities, both academic core tasks and managerial/administrative activities. The issue addressed in this chapter is how these changes have affected the role of the academic leader. Across the four countries, we see clear signs of change regarding academic leadership comprising a mix of institutional logics in the interviews: the professional, collegial traditional academic leadership, which is based on rotating systems, election among peers, and collegial decision-making, has been complemented with, and in some places replaced by, a managerial logic with top-down order-giving, performance measurement and appointed managers as a new academic profession. Another related general trend is the greater focus on individual managers. The analysis also shows that Denmark and Finland are the countries that lead the way when it comes to increasing the formal authority of managers. The introduction of appointed managers rather than elected ones has altered the way HEIs operate in these two countries. However, as this chapter has shed light on, management reform has not been implemented in the same depth and with the same pace across and within universities.
LHC limits on gluinos and squarks in the minimal Dirac gaugino model
Authors: Chalons Guillaume , Goodsell Mark D. , Kraml Sabine , Reyes-González Humberto , Williamson Sophie L. 
Published: April 2019

Abstract
Dirac gauginos are a well-motivated extension of the MSSM, leading to interesting phenomenological consequences. At the LHC, gluino-pair production is enhanced while squark production is suppressed as compared to the MSSM, and the decay signatures are altered by a more complex chargino and neutralino spectrum. We investigate how this impacts current gluino and squark mass limits from Run 2 of the LHC. Concretely, we compare different assumptions about the electroweak-ino spectrum through four benchmark models paying particular attention to the effect of the trilinear λS coupling, which induces a mass splitting between the mostly bino/U(1) adjoint states. Among other results, we show that for large λS the additional $$ {\tilde{\chi}}_2^0\to f\overline{f}{\tilde{\chi}}_1^0 $$

χ
˜

2
0

→
f

f
¯

χ
˜

1
0

decays somewhat weaken the limits on gluinos (squarks) in case of heavy squarks (gluinos). Moreover, we compare the limits in the gluino vs. squark mass plane to those obtained in equivalent MSSM scenarios.
Cause of Death in Utah Avalanche Fatalities, 2006–2007 through 2017–2018 Winter Seasons
Authors: McIntosh Scott E. , Brant-Zawadzki Graham , Milliner Brendan H. , Christensen Erik D. , Nyberg Andrew A. , Grissom Colin K. , Olivares Christopher R. , Kim Han S. , Tremper Bruce 
Published: April 2019

Introduction Understanding patterns of avalanche fatalities can aid prevention and rescue strategies. In 2007, we published a report reviewing avalanche deaths in Utah between the 1989–1990 and 2005–2006 winter seasons. In the current report, we discuss Utah avalanche fatalities from the 2006–2007 to 2017–2018 seasons. Methods Avalanche fatality data were obtained from the Utah Avalanche Center and Utah State Office of the Medical Examiner. Autopsy reports were reviewed to determine demographic information, type of autopsy (external vs internal), injuries, and cause of death. Results Thirty-two avalanche deaths occurred in Utah during the study period. The mean (±SD) age of victims was 32±13 (8–54) y. Thirty victims (94%) were male and 2 (6%) were female. Seventy-two percent of deaths were from asphyxiation, 19% from trauma alone, and 9% from a combination of asphyxiation and trauma. Snowmobilers accounted for the largest percentage of avalanche fatalities (15 victims; 47%) during the 2007–2018 period. Conclusions Asphyxia continues to be the most prevalent killer in avalanche burial. Patterns of ongoing avalanche deaths continue to suggest that rapid recovery and techniques that prolong survival while buried may decrease fatality rates. Trauma is a significant factor in many avalanche fatalities. Education and technologies focused on reducing traumatic injuries such as improved education in techniques for avalanche risk avoidance and/or use of avalanche airbags may further decrease fatality rates. Snowmobilers represent an increasing percentage of Utah avalanche deaths and now make up the majority of victims; increased education targeting this demographic in the basics of avalanche rescue gear and avalanche rescue may also reduce fatalities.
Simulated mechanical control of flowering rush (Butomus umbellatus) under mesocosm conditions
Authors: Turnage Gray , Madsen John D. , Wersal Ryan M. , Byrd John D. 
Published: April 2019

AbstractFlowering rush (Butomus umbellatus L.) is an invasive aquatic and wetland plant capable of developing monotypic stands in emergent and submersed sites. This plant can rapidly outcompete native vegetation and impede human practices by reducing recreation (boating, fishing, and skiing) and disrupting agricultural use of water resources (irrigation canals). Mechanical removal practices occurring biweekly, monthly, bimonthly, and once per growing season were compared with chemical control with diquat applied sequentially at 0.19 ppmv ai for two consecutive months over 2 yr (2016 and 2017). Biweekly removal gave the most consistent control of B. umbellatus biomass and propagules. Diquat application along with monthly and bimonthly clippings gave varying degrees of B. umbellatus control. Clipping once per growing season did not control B. umbellatus when compared with reference plants, while clipping B. umbellatus every 2 wk (biweekly) controlled rush propagules most effectively. However, it is unlikely this method will be sufficient as a stand-alone control option due to the slow speed of harvester boats, the potential these boats have to spread B. umbellatus propagules to more sites, and the expense of mechanical operations. However, clipping could be used as part of an integrated strategy for B. umbellatus control.
The evolution of a mobile payment solution network
Authors: Aas Kjersti , Rognebakke Hanne 
Published: April 2019

AbstractVipps is a peer-to-peer mobile payment solution launched by Norway’s largest financial services group DNB. The Vipps transaction data may be viewed as a graph with users corresponding to the nodes, and the financial transactions between the users defining the edges. We have followed the evolution of this graph from May 2015 to September 2016. This is a unique data set, as information about transactions of individuals is usually not available for research. In this paper, we use an advanced statistical model where preferential attachment is combined with fitness. We show that the intrinsic quality of the nodes in the Vipps network plays an important part in the evolution of the network. This insight may, e.g., be used to identify influential nodes for viral marketing.
A record of mid- and late Holocene paleohydroclimate from Lower Pahranagat Lake, southern Great Basin
Authors: Theissen Kevin M. , Hickson Thomas A. , Brundrett Ashley L. , Horns Sarah E. , Lachniet Matthew S. 
Published: April 2019

AbstractWe present a continuous, sediment core-based record of paleohydroclimate spanning ~5800 cal yr BP to recent from Lower Pahranagat Lake (LPAH), a shallow, alkaline lake in southern Nevada. We apply stable isotopes (δ18O and δ13C) from fine-fraction authigenic carbonate, which are sensitive recorders of hydroclimatic variability in this highly evaporative region. Additional geochemical proxies (total organic carbon, C/N, and total inorganic carbon) provide supporting information on paleoecological change in and around the lake. Our data suggest progressively wetter conditions starting at the later part of the middle Holocene and extending into the late Holocene (~5500–3350 cal yr BP) followed by a millennial-scale dry period from ~3150 to 1700 cal yr BP. This latter interval encompasses the ‘Late Holocene dry period’ (LHDP) reported by other investigators, and our data help refine the area affected in this episode. Our data also show evidence for a series of century-scale fluctuations in regional hydroclimate, including wet and dry intervals between 2350 and 1600 cal yr BP, and drier conditions over the past few centuries. Paleohydroclimate trends in the LPAH record show correspondence with those from the central Great Basin to the north, suggesting that both areas were subject to similar climatic forcings.
Ice Complex formation on Bol'shoy Lyakhovsky Island (New Siberian Archipelago, East Siberian Arctic) since about 200 ka
Authors: Wetterich Sebastian , Rudaya Natalia , Kuznetsov Vladislav , Maksimov Fedor , Opel Thomas , Meyer Hanno , Günther Frank , Bobrov Anatoly , Raschke Elena , Zimmermann Heike H. , Strauss Jens , Starikova Anna , Fuchs Margret , Schirrmeister Lutz 
Published: April 2019

AbstractLate Quaternary landscapes of unglaciated Beringia were largely shaped by ice-wedge polygon tundra. Ice Complex (IC) strata preserve such ancient polygon formations. Here we report on the Yukagir IC from Bol'shoy Lyakhovsky Island in northeastern Siberia and suggest that new radioisotope disequilibria (230Th/U) dates of the Yukagir IC peat confirm its formation during the Marine Oxygen Isotope Stage (MIS) 7a–c interglacial period. The preservation of the ice-rich Yukagir IC proves its resilience to last interglacial and late glacial–Holocene warming. This study compares the Yukagir IC to IC strata of MIS 5, MIS 3, and MIS 2 ages exposed on Bol'shoy Lyakhovsky Island. Besides high intrasedimental ice content and syngenetic ice wedges intersecting silts, sandy silts, the Yukagir IC is characterized by high organic matter (OM) accumulation and low OM decomposition of a distinctive Drepanocladus moss-peat. The Yukagir IC pollen data reveal grass-shrub-moss tundra indicating rather wet summer conditions similar to modern ones. The stable isotope composition of Yukagir IC wedge ice is similar to those of the MIS 5 and MIS 3 ICs pointing to similar atmospheric moisture generation and transport patterns in winter. IC data from glacial and interglacial periods provide insights into permafrost and climate dynamics since about 200 ka.
For Conscience and Kingdom Martyrs, Monarchs and the Spirit of Modernity in Early Modern England
Authors: Fordahl Clayton 
Published: April 2019

AbstractThis article compares the collective commemoration of martyrs to ascertain changes in cultural understandings of the relationship between the ultimate sacrifice offered by an individual and monarchal violence. This historical comparison is used to argue that changes in the nature of Christianity transformed the popular interpretation of sovereign violence from a desecrative to a redemptive force. While cultural individualism and political statism appear in secularized modernity as contradictory impulses, their birth in early modernity was induced by coherent and entirely consistent religious worldview.
Multi-band rejection filters based on spoof surface plasmon polaritons and folded split-ring resonators
Authors: Li Luping , Dong Lijuan , Chen Peng , Yang Kai 
Published: April 2019

AbstractA dualband rejection filter and a triband rejection filter are proposed in this letter, both of which are implemented by cascading spoof surface plasmon polaritons (SSPPs) of the same structure but with diverse rejection bands. Compared with traditional ones, the proposed filters provide more compact structures, wider rejection bands, and better independent tunability. In the proposed filters, the rejection bandwidth, the center frequency of the rejection band and the filter's cutoff frequency can be adjusted independently. And the different rejection bands in the same filter also can be independently controlled. Agreements between the dispersion of SSPP units and the S21 of filters are also presented. Measurement results demonstrate that both filters load multiple rejection bands on the 27.7 GHz wide low-pass band and all the rejection bands locate in Ku and K bands. The average rejection bandwidth and the average rejection depth of the two filters are 1.49 GHz and 42.1 dB, respectively.
Dark tourism: The “heritagization” of sites of suffering, with an emphasis on memorials of the genocide perpetrated against the Tutsi of Rwanda
Authors: Becker Annette 
Published: April 2019

AbstractNowadays, there exists an international movement towards the extensive recognition as cultural heritage, or “heritagization”, of areas where wars, genocides and massacres have taken place. The phenomenon of “seeing” mass death, called “dark tourism” or the “tourism of desolation”, has become both an aim and a destination for visitors. The article examines this heritagization, with an emphasis on the memorials of the genocide perpetrated against the Tutsi of Rwanda.
Emotional Impact and Perceived Effectiveness of Text-Only versus Graphic Health Warning Tobacco Labels on Adolescents
Authors: Margalhos Pedro , Esteves Francisco , Vila Jaime , Arriaga Patrícia 
Published: April 2019

AbstractThe study of smoking in adolescence is of major importance as nicotine dependence often begins in younger groups. Tobacco health warnings have been introduced to inform people of the negative consequences of smoking. This study assessed the emotions and perceived effectiveness of two formats of tobacco warnings on adolescents: Text-only versus graphic warning labels. In addition, we analyzed how emotions predicted their perceived effectiveness. In a cross-sectional study, 413 adolescents (131 smokers, 282 non-smokers) between 13–20 years of age rated their emotions (valence and arousal) and perceived effectiveness towards a set of tobacco warnings. Results showed that graphic warnings evoked higher arousal than text-only warning labels (p = .038). Most of the warning labels also evoked unpleasantness with smokers reporting higher unpleasantness regarding text-only warnings compared to non-smokers (p = .002). In contrast, perceived effectiveness of the warnings was lower in smokers than in non-smokers (p = .029). Finally, high arousal and being a non-smoker explained 14% of the variance of perceiving the warnings more effective. Given the role that warnings may play in increasing health awareness, these findings highlight how smoking status and emotions are important predictors of the way adolescents consider tobacco health labels to be effective.
Erythrocytes polyunsaturated fatty acids mediate relationship between dietary patterns and depression
Authors: Khosravi Maryam , Sotoudeh Gity , Ahmadkhaniha Reza , Majdzadeh Reza , Raisi Firoozeh 
Published: April 2019

Abstract. Background: This study aimed to examine the association between depression and dietary patterns via the intermediary role of erythrocytes polyunsaturated fatty acids (PUFA). Methods: In this individually matched case-control study, the dietary patterns were extracted for 330 individuals using factor analysis. Furthermore, erythrocyte PUFAs including n-3 and n-6 were assessed using a GC–Mass spectrometry analytical method for 84 people. Depression was diagnosed using the criteria mentioned in the Diagnostic and Statistical Manual of Mental Disorders. The dietary patterns were also extracted using a valid and reliable semi-quantitative food frequency questionnaire. Results: The findings showed that healthy dietary patterns were related to the risk of depression (P = 0.01, odds ratio (OR) = 0.31, 95% confidence interval (CI): 0.14-0.68) by the increase of ratio n-3 /n-6 PUFA (p ≤ 0.03) and decrease of ratio n-6 /n-3 PUFA (p ≤ 0.005). Moreover, the unhealthy dietary patterns were associated with the risk of depression (P = 0.02, OR = 2.7, 95%CI: 1.25-5.9) by the decrease of ratio n-3/n-6 PUFA (p ≤ 0.03) and increase of ratio n-6/n-3 PUFA (p ≤ 0.001). Conclusion: Based on the results, the type of dietary pattern is related to the risk of depression considering the changes in n-3 and n-6 PUFA as well as the ratio of n-3 to n-6 as the mediator variables. Of course, further studies are required in this area.
Time of Steady Climate Change
Authors: Lickley Megan , cael b. b. , Solomon Susan 
Published: April 2019

AbstractUnder an emission scenario where atmospheric greenhouse gas concentrations are stabilized, previous work suggests that on centennial time scales the rate of global temperature increases would steady at significantly lower rates than those of the 21st century. As climate change is not globally uniform, regional differences in achieving this steady rate of warming can be expected. Here, we define a “Time of Steady Change” (TSC) as the time of reaching this steady rate of warming, and we present a method for estimating TSC with the use of General Circulation Model experiments run under greenhouse gas stabilization scenarios. We find that TSC occurs latest in low latitudes and in the Arctic, despite these areas steadying at very different absolute warming rates. These broad patterns are robust across multiple General Circulation Model ensembles and alternative definitions of TSC. These results indicate large regional differences in the trajectory of climate change in coming centuries.
A Bottomside Parameterization for the Empirical Canadian High Arctic Ionospheric Model
Authors: Themens David R. , Jayachandran P.T. , McCaffrey Anthony M. , Reid Benjamin , Varney Roger H. 
Published: April 2019

AbstractIn this study, we present a bottomside model representation to be used by the Empirical Canadian High Arctic Ionospheric Model (E‐CHAIM). This model features a new approach to modeling the bottomside electron density; namely, instead of modelling electron density directly, E‐CHAIM models the altitude profile of the scale thickness of a single bottomside layer. In this approach, the curvature in the bottomside associated with the E region and F1 layer is represented in the scale thickness domain as a peak function centered at the layer peak altitude. The use of this approach ensures the production of explicitly doubly differentiable bottomside electron density profiles and directly avoids issues known to exist within current standards, such as the International Reference Ionosphere (IRI), which has discontinuities in space, time, and in the vertical electron density gradient. In terms of performance, after removing the impacts of hmF2 and NmF2, the new E‐CHAIM profile function generally performs comparably to the IRI, with bottomside TEC from both models within 2.0 TECU (1 TECU = 1016 e/m3) of observations. More specifically, the E‐CHAIM bottomside is demonstrated to outperform the IRI bottomside function in the F region during low solar activity periods with respect to incoherent scatter radar observations. At high latitudes, E‐CHAIM tends to outperform the IRI during winter months by between 10% and 40% of NmF2 while being outperformed by the IRI by between 10% and 25% of NmF2 during summer periods, mainly during the daytime at high solar activity.
Additive-free MXene inks and direct printing of micro-supercapacitors
Authors: Zhang Chuanfang , McKeon Lorcan , Kremer Matthias P. , Park Sang-Hoon , Ronan Oskar , Seral‐Ascaso Andrés , Barwich Sebastian , Coileáin Cormac Ó , McEvoy Niall , Nerl Hannah C. , Anasori Babak , Coleman Jonathan N. , Gogotsi Yury , Nicolosi Valeria 
Published: April 2019

AbstractDirect printing of functional inks is critical for applications in diverse areas including electrochemical energy storage, smart electronics and healthcare. However, the available printable ink formulations are far from ideal. Either surfactants/additives are typically involved or the ink concentration is low, which add complexity to the manufacturing and compromises the printing resolution. Here, we demonstrate two types of two-dimensional titanium carbide (Ti3C2Tx) MXene inks, aqueous and organic in the absence of any additive or binary-solvent systems, for extrusion printing and inkjet printing, respectively. We show examples of all-MXene-printed structures, such as micro-supercapacitors, conductive tracks and ohmic resistors on untreated plastic and paper substrates, with high printing resolution and spatial uniformity. The volumetric capacitance and energy density of the all-MXene-printed micro-supercapacitors are orders of magnitude greater than existing inkjet/extrusion-printed active materials. The versatile direct-ink-printing technique highlights the promise of additive-free MXene inks for scalable fabrication of easy-to-integrate components of printable electronics.
Cross-reactive neutralizing human survivor monoclonal antibody BDBV223 targets the ebolavirus stalk
Authors: King Liam B. , West Brandyn R. , Moyer Crystal L. , Gilchuk Pavlo , Flyak Andrew , Ilinykh Philipp A. , Bombardi Robin , Hui Sean , Huang Kai , Bukreyev Alexander , Crowe James E. , Saphire Erica Ollmann 
Published: April 2019

AbstractThree Ebolavirus genus viruses cause lethal disease and lack targeted therapeutics: Ebola virus, Sudan virus and Bundibugyo virus. Monoclonal antibody (mAb) cocktails against the surface glycoprotein (GP) present a potential therapeutic strategy. Here we report two crystal structures of the antibody BDBV223, alone and complexed with its GP2 stalk epitope, an interesting site for therapeutic/vaccine design due to its high sequence conservation among ebolaviruses. BDBV223, identified in a human survivor of Bundibugyo virus disease, neutralizes both Bundibugyo virus and Ebola virus, but not Sudan virus. Importantly, the structure suggests that BDBV223 binding interferes with both the trimeric bundle assembly of GP and the viral membrane by stabilizing a conformation in which the monomers are separated by GP lifting or bending. Targeted mutagenesis of BDBV223 to enhance SUDV GP recognition indicates that additional determinants of antibody binding likely lie outside the visualized interactions, and perhaps involve quaternary assembly or membrane-interacting regions.