bluuebunny/crossref_metadata_2025_split huggingface dataset:
Risk for Repeat Emergency Department Visits for Violent Injuries in Youth Firearm Victims
Authors: Lim Hyun Ja , McCart Michael , Davies W Hobart , Calhoun Alice , Melzer-Lange Marlene D. 
Published: November 2017

Objective To identify significant risk factors associated with repeat emergency department (ED). Visits for violent injuries in youth firearm victims. Methods The study subjects of this retrospective cohort study were firearm victims aged 18 and younger presenting to a Pediatric Emergency Department/Trauma Center at Children's Hospital of Wisconsin between 1990 and 1995. The primary outcome was subsequent Emergency Department visits (REDV) at any emergency department in Milwaukee for a violent injury. Results A total of 495 subjects were eligible for the present study in the pediatric firearm victim's ED visit database. Eighty-five percent (n = 420) were males and 82% were African-Americans. Mean age was 15 years old (s.d = ±3.6). A majority of them had a single-parent family. Eighty-eight subjects (17.8%) had a prior history of ED visit due to violence. During the study time, 201 subjects had at least one REDV. In the multivariable model, a subject without a social worker consulting at the hospital were more likely to have REDV compared to subjects with a social worker consulting (O.R = 1.749; p-value = 0.047), controlling for guardian and disposition. Subjects disposed to detention center or police custody were more likely to have REDV compared to subjects disposed to home or a hospital (O.R = 5.351; p-value = 0.003). Conclusion Our analysis indicates that individuals with guardians, those who did not receive social worker intervention on their initial visit, and those discharged in police custody were associated with increased repeat ED visits due to a violent injury.
Saliva Cotinine and Exhaled Carbon Monoxide in Real Life Waterpipe Smokers: A Post Hoc Analysis
Authors: Pascale Salameh , Zeina Aoun Bacha , Mirna Waked 
Published: November 2017

Introduction We have already suggested that waterpipe (WP) smoking is associated with an increase in saliva cotinine and carbon monoxide in a small number of smokers. Objective The primary objective of this study was to confirm the increase in exhaled carbon monoxide (CO) and saliva cotinine equivalents levels in waterpipe smokers in a real smoking environment, compared with cigarettes smokers and never smokers. The secondary objective was to assess the factors associated with WP dependence according to the Lebanese Waterpipe Dependence Scale —11 (LWDS-11). Methods Three groups were included in the study: never smokers (n = 43), waterpipe smokers (n = 103), and cigarette smokers (n = 42). A questionnaire was completed for each participant, exhaled CO measured before and after waterpipe or cigarette smoking, and saliva cotinine equivalents dosed one hour after WP smoking or after one cigarette. Results Waterpipe smokers, like cigarette smokers, are exposed to nicotine and to CO. We found that levels of saliva cotinine equivalents were lower in waterpipe compared with cigarette smokers, but significantly higher than never smokers. In waterpipe smokers, saliva cotinine equivalents was mainly affected by the number of waterpipes per week and the size of the waterpipe. High levels were again found for expired CO, which increased by 500% in waterpipe smokers, in comparison with 100% in cigarette smokers; in waterpipe smokers, the relative increase in CO was affected by the number of waterpipes smoked before measurements, while it was inversely associated to the number of persons with whom they were sharing the WP and to the WP size. WP dependence was significantly correlated with the number of smokers at home, at work, and the body mass index. Conclusion This is a confirmation of real life waterpipe tobacco smoking characteristics in Lebanon. It indicates that nicotine is only marginally retained in the bowl water where smoke passes, and that waterpipe smokers could be exposed to harmful substances, such as CO that was found to be quite high. The level of expired CO and salivary cotinine could be good tools to detect exposure to waterpipe tobacco smoking. In addition, obesity and surrounding smokers could increase the risk of WP dependence.
Key policy actions for sustainable land and water use to serve people
Authors: von Braun Joachim , Gulati Ashok , Kharas Homi 
Published: November 2017

Abstract
To achieve food security for all, new resource policies for sustainable land and water use are needed. Land, water and energy need to be considered jointly in policies, not in isolation. United Nations, G20 countries’ policy makers, corporate and civil society actors, and those of other countries should act in coordinated fashion in the following four policy areas on which specific proposals are made in this policy paper: 1) focusing land, and water resource policies on human wellbeing, 2) investing in and sharing water, agricultural and energy innovations, 3) making wider use of digital opportunities for sustainable agriculture, and 4) re-designing global governance of agriculture and food.
Replacing the AMOR with the miniDOAS in the ammonia monitoring network in the Netherlands
Authors: Berkhout Augustinus J. C. , Swart Daan P. J. , Volten Hester , Gast Lou F. L. , Haaima Marty , Verboom Hans , Stefess Guus , Hafkenscheid Theo , Hoogerbrugge Ronald 
Published: November 2017

Abstract. In this paper we present the continued development of the miniDOAS, an active differential optical absorption spectroscopy (DOAS) instrument used to measure ammonia concentrations in ambient air. The miniDOAS has been adapted for use in the Dutch National Air Quality Monitoring Network. The miniDOAS replaces the life-expired continuous-flow denuder ammonia monitor (AMOR). From September 2014 to December 2015, both instruments measured in parallel before the change from AMOR to miniDOAS was made. The instruments were deployed at six monitoring stations throughout the Netherlands. We report on the results of this intercomparison. Both instruments show a good uptime of ca. 90 %, adequate for an automatic monitoring network. Although both instruments produce 1 min values of ammonia concentrations, a direct comparison on short timescales such as minutes or hours does not give meaningful results because the AMOR response to changing ammonia concentrations is slow. Comparisons between daily and monthly values show good agreement. For monthly averages, we find a small average offset of 0.65 ± 0.28 µg m−3 and a slope of 1.034 ± 0.028, with the miniDOAS measuring slightly higher than the AMOR. The fast time resolution of the miniDOAS makes the instrument suitable not only for monitoring but also for process studies.
Revegetation in abandoned quarries with landfill stabilized waste and gravels: water dynamics and plant growth – a case study
Authors: Zhang Cheng-liang , Feng Jing-jing , Rong Li-ming , Zhao Ting-ning 
Published: November 2017

Abstract. Large amounts of quarry wastes are produced during quarrying. Though quarry wastes are commonly used in pavement construction and concrete production, in situ utilization during ecological restoration of abandoned quarries has the advantage of simplicity. In this paper, rock fragments 2–3 cm in size were mixed with landfill stabilized waste (LSW) in different proportions (LSW : gravel, RL), which was called LGM. The water content, runoff and plant growth under natural precipitation were monitored for 2 years using a runoff plot experiment. LGM with a low fraction of LSW was compacted to different degrees to achieve an appropriate porosity; water dynamics and plant growth of compacted LGM were studied in a field experiment. The results showed the following: (1) LGM can be used during restoration in abandoned quarries as growing material for plants. (2) RL had a significant effect on the infiltration and water-holding capacity of LGM and thus influenced the retention of precipitation, water condition and plant growth. LGM with RL ranging from 8:1 to 3:7 was suitable for plant growth, and the target species grew best when RL was 5:5. (3) Compaction significantly enhanced water content of LGM with a low RL of 2:8, but leaf water content of plants was lower or unchanged in the more compacted plots. Moderate compaction was beneficial to the survival and growth of Robinia pseudoacacia L. Platycladus orientalis (L.) Franco and Medicago sativa L. were not significantly affected by compaction, and they grew better under a high degree of compaction, which was disadvantageous for the uppermost layer of vegetation.
A Proposal for an Integrative Model of Academic Innovativeness: The Case of Business Schools in the Kingdom of Saudi Arabia
Authors: Ragmoun Wided , Alfalih Abdullah Abdulmohsen , Alfalih Abdulaziz Abdulmohsen 
Published: November 2017

Based on previous research related to innovation at different levels, this paper will try to define an integrative model of academic innovation. In other words, we will propose a model which includes antecedents, dimensions and outcomes of academic innovation in business schools in the Kingdom of Saudi Arabia (KSA).This research is based on 140 questionnaires from different business schools in KSA. In this case, our objective is not only exploratory. We can say that this research must provide us with an integrative model of academic innovativeness, but this concept seems to be an objective and a variable here.It is an objective because we are looking to explain its determinants based on organizational learning capacity. At the same time, if this innovativeness exists and is defined in business schools, what are its importance and its tangible effect? For this, we must consider innovativeness as a moderator variable with different dimensions, which can improve academic performance in both teaching and research.This study shows that creativity and the need for collaboration are considered to be specific attributes of innovativeness in this field, and academic performance is one of the major outcomes of this dynamic process of innovation, appreciated at two levels: individual and organizational.
Microphysically Derived Expressions for Rate‐and‐State Friction Parameters, a, b, and Dc
Authors: Chen Jianye , Niemeijer A. R. , Spiers Christopher J. 
Published: November 2017

AbstractRate‐and‐state friction (RSF) laws are extensively applied in fault mechanics but have a largely empirical basis reflecting only limited understanding of the underlying physical mechanisms. We recently proposed a microphysical model describing the frictional behavior of a granular fault gouge undergoing deformation in terms of granular flow accompanied by thermally activated creep and intergranular sliding at grain contacts. Numerical solutions reproduced typical experimental results well. Here we extend our model to obtain physically meaningful, analytical expressions for the steady state frictional strength and standard RSF parameters, a, b, and Dc. The frictional strength contains two components, namely, grain boundary friction and friction due to intergranular dilatation. The expressions obtained for a and b linearly reflect the rate dependence of these two terms. Dc scales with slip band thickness and varies only slightly with velocity. The values of a, b, and Dc predicted show quantitative agreement with previous experimental results, and inserting their values into classical RSF laws gives simulated friction behavior that is consistent with the predictions of our numerically implemented model for small departures from steady state. For large velocity steps, the model produces mixed RSF behavior that falls between the Slowness and Slip laws, for example, with an intermediate equivalent slip(‐weakening) distance d0. Our model possesses the interesting property not only that a and b are velocity dependent but also that Dc and d0 scale differently from classical RSF models, potentially explaining behaviour seen in many hydrothermal friction experiments and having substantial implications for natural fault friction.
Dynamic Triggering of Mud Volcano Eruptions During the 2016–2017 Central Italy Seismic Sequence
Authors: Maestrelli Daniele , Bonini Marco , Delle Donne Dario , Manga Michael , Piccardi Luigi , Sani Federico 
Published: November 2017

AbstractOn 24 August 2016 a seismic event (Mw6.0) was the first of the long Central Italy sequence (ongoing at the end of 2017) of medium‐to‐high magnitude earthquakes, with nineMw≥5 up to October 2017, and with about 74.000 seismic events registered after 1 year. The largest was theMw6.5 30 October 2016 event near Norcia. After the major seismic events, 17 mud volcanoes erupted around Monteleone di Fermo village (Marche region). Mud volcano eruptions generally occurred a few hours to a few days after the main earthquakes, suggesting a seismic triggering. We analyzed the peak ground velocities and dynamic stresses during the three largest earthquakes. We also evaluated the static stress changes in order to assess the potential influence of normal stress changes on the feeder system of the activated mud volcanoes. We find a correlation with dynamic stresses, whereas static stress changes are negligible or negative (with values reaching −0.44 bar, clamping feeder dykes). We conclude that seismic shaking (up to ~3.9 bar during Norcia earthquake) is the dominant driver for these eruptions. Finally, we evaluated the response ratio as a function of the dynamic stress. It increases exponentially with peak dynamic stress varying from <10% for peak dynamic stress >0.3 bar to >50% for peak dynamic stress >2 bar, indicating a link between earthquake shaking and mud volcano activity.
Velocity and Drag Evolution From the Leading Edge of a Model Mangrove Forest
Authors: Maza Maria , Adler Katherine , Ramos Diogo , Garcia Adrian Mikhail , Nepf Heidi 
Published: November 2017

AbstractAn experimental study of unidirectional flow through a model mangrove forest measured both velocity and forces on individual trees. The individual trees were 1/12th scale models of mature Rhizophora, including 24 prop roots distributed in a three‐dimensional layout. Thirty‐two model trees were distributed in a staggered array producing a 2.5 m long forest. The velocity evolved from a boundary layer profile at the forest leading edge to a vertical profile determined by the vertical distribution of frontal area, with significantly higher velocity above the prop roots. Fully developed conditions were reached at the fifth tree row from the leading edge. Within the root zone the velocity was reduced by up to 50% and the TKE was increased by as much as fivefold, relative to the upstream conditions. TKE in the root zone was mainly produced by root and trunk wakes, and it agreed in magnitude with the estimation obtained using the Tanino and Nepf (2008) formulation. Maximum TKE occurred at the top of the roots, where a strong shear region was associated with the change in frontal area. The drag measured on individual trees decreased from the leading edge and reached a constant value at the fifth row and beyond, i.e., in the fully developed region. The drag exhibited a quadratic dependence on velocity, which justified the definition of a quadratic drag coefficient. Once the correct drag length‐scale was defined, the measured drag coefficients collapsed to a single function of Reynolds number.
A Spectrally Selective Attenuation Mechanism‐Based Kpar Algorithm for Biomass Heating Effect Simulation in the Open Ocean
Authors: Chen Jun , Zhang Xiangguang , Xing Xiaogang , Ishizaka Joji , Yu Zhifeng 
Published: November 2017

AbstractQuantifying the diffuse attenuation coefficient of the photosynthetically available radiation (Kpar) can improve our knowledge of euphotic depth (Zeu) and biomass heating effects in the upper layers of oceans. An algorithm to semianalytically derive Kpar from remote sensing reflectance (Rrs) is developed for the global open oceans. This algorithm includes the following two portions: (1) a neural network model for deriving the diffuse attention coefficients (Kd) that considers the residual error in satellite Rrs, and (2) a three band depth‐dependent Kpar algorithm (TDKA) for describing the spectrally selective attenuation mechanism of underwater solar radiation in the open oceans. This algorithm is evaluated with both in situ PAR profile data and satellite images, and the results show that it can produce acceptable PAR profile estimations while clearly removing the impacts of satellite residual errors on Kpar estimations. Furthermore, the performance of the TDKA algorithm is evaluated by its applicability in Zeu derivation and mean temperature within a mixed layer depth (TML) simulation, and the results show that it can significantly decrease the uncertainty in both compared with the classical chlorophyll‐a concentration‐based Kpar algorithm. Finally, the TDKA algorithm is applied in simulating biomass heating effects in the Sargasso Sea near Bermuda, with new Kpar data it is found that the biomass heating effects can lead to a 3.4°C maximum positive difference in temperature in the upper layers but could result in a 0.67°C maximum negative difference in temperature in the deep layers.
Direct Measurement of Interparticle Forces of Titan Aerosol Analogs (“Tholin”) Using Atomic Force Microscopy
Authors: Yu Xinting , Hörst Sarah M. , He Chao , McGuiggan Patricia , Bridges Nathan T. 
Published: November 2017

AbstractTo understand the origin of the dunes on Titan, it is important to investigate the material properties of Titan's organic sand particles on Titan. The organic sand may behave distinctively compared to the quartz/basaltic sand on terrestrial planets (Earth, Venus, and Mars) due to differences in interparticle forces. We measured the surface energy (through contact angle measurements) and elastic modulus (through Atomic Force Microscopy) of the Titan aerosol analog (tholin). We find that the surface energy of a tholin thin film is about 70.9 mN/m, and its elastic modulus is about 3.0 GPa (similar to hard polymers like PMMA and polystyrene). For two 20 μm diameter particles, the theoretical cohesion force is therefore 3.3 μN. We directly measured interparticle forces for relevant materials: tholin particles are 0.8 ± 0.6 μN, while the interparticle cohesion between walnut shell particles (a typical model materials for the Titan Wind Tunnel, TWT) is only 0.4 ± 0.1 μN. The interparticle cohesion forces are much larger for tholins and presumably Titan sand particles than materials used in the TWT. This suggests that we should increase the interparticle force in both analog experiments (TWT) and threshold models to correctly translate the results to real Titan conditions. The strong cohesion of tholins may also inform us how the small aerosol particles (∼1 μm) in Titan's atmosphere are transformed into large sand particles (∼200 μm). It may also support the cohesive sand formation mechanism suggested by Rubin and Hesp (2009), where only unidirectional wind is needed to form linear dunes on Titan.
Virus‐Templated Self‐Mineralization of Ligand‐Free Colloidal Palladium Nanostructures for High Surface Activity and Stability
Authors: Kim Insu , Kang Kyungnam , Oh Mi Hwa , Yang Moon Young , Park Inkyu , Nam Yoon Sung 
Published: November 2017

AbstractIn solution‐based synthesis of colloidal nanostructures, additions of ligands, stabilizers, and redox reagents are generally required to obtain desirable structures, though ligands and stabilizers on the surface of nanostructures can substantially affect the surface‐related activity. Accordingly, an extensive rinsing process is usually required to remove residual reagents and stabilizers. This study reports a spontaneous self‐biomineralization of palladium (Pd) ions on a filamentous virus to form ligand‐free Pd nanowires under ambient conditions. No reducing reagents or additional surface stabilizers are used; the genetically modified virus alone supports the polycrystalline Pd nanowires within the nanostructure, maintaining the clean surface even without a rinsing process. The advantage of the ligand‐free Pd nanowires is found in the Suzuki‐coupling reaction, in which the nanowire catalytic activity is maintained after repeated reactions, while conventional Pd colloids undergo surface contamination by the stabilizer and lose their catalytic activity during repeated uses. The ligand‐free surface, high electronic connectivity, and structural stability of the Pd nanowires also allow high sensitivity and selectivity in hydrogen gas sensing analysis. This work emphasizes the importance of the ligand‐free surface of biotemplated nanostructures in maintaining functionalities without surface contamination.
PtCoFe Nanowire Cathodes Boost Short‐Circuit Currents of Ru(II)‐Based Dye‐Sensitized Solar Cells to a Power Conversion Efficiency of 12.29%
Authors: Chiang Chin‐Cheng (Paul) , Hung Chang‐Yu , Chou Shang‐Wei , Shyue Jing‐Jong , Cheng Kum‐Yi , Chang Pei‐Jen , Yang Ya‐Yun , Lin Ching‐Yen , Chang Ting‐Kuang , Chi Yun , Chou Hung‐Lung , Chou Pi‐Tai 
Published: November 2017

AbstractPtCoFe nanowires with different alloying compositions are chemically prepared and acted as counter electrodes (CEs) in dye‐sensitized solar cells (DSSCs) with Ru(II)‐based dyes. Due to their superior reduction activity, PtCoFe nanowires with rich (111) facets enhance the performance of DSSCs. Hence, N719 DSSCs with PtCoFe nanowires, respectively, produce better power conversion efficiency (PCE) of 8.10% for Pt33Co24Fe43 nanowire, 8.33% for Pt74Co12Fe14 nanowire, and 9.26% for Pt49Co23Fe28 nanowire in comparison to the PCE of Pt CE (7.32%). Further, the PRT‐22 DSSC with Pt49Co23Fe28 nanowire exhibits a maximum PCE of 12.29% with a certificated value of 12.0%, which surpass the previous PCE record of the DSSCs with Ru(II)‐based dyes. The photovoltaic and electrochemical results reveal the composition‐dependent activity along with a volcano‐shaped trend in the I−/ redox reaction. Theoretical work on the adsorption energies of I2, the desorption energies of I−, and the corresponding absolute energy demonstrates that the reduction activity followed in the order of Pt49Co23Fe28(111) plane > Pt74Co12Fe14(111) plane > Pt33Co24Fe43(111) plane, proving Pt49Co23Fe28 nanowire to be a superior cathode material for DSSCs.
Correlated In Situ Low‐Frequency Noise and Impedance Spectroscopy Reveal Recombination Dynamics in Organic Solar Cells Using Fullerene and Non‐Fullerene Acceptors
Authors: Luck Kyle A. , Sangwan Vinod K. , Hartnett Patrick E. , Arnold Heather N. , Wasielewski Michael R. , Marks Tobin J. , Hersam Mark C. 
Published: November 2017

AbstractNon‐fullerene acceptors based on perylenediimides (PDIs) have garnered significant interest as an alternative to fullerene acceptors in organic photovoltaics (OPVs), but their charge transport phenomena are not well understood, especially in bulk heterojunctions (BHJs). Here, charge transport and current fluctuations are investigated by performing correlated low‐frequency noise and impedance spectroscopy measurements on two BHJ OPV systems, one employing a fullerene acceptor and the other employing a dimeric PDI acceptor. In the dark, these measurements reveal that PDI‐based OPVs have a greater degree of recombination in comparison to fullerene‐based OPVs. Furthermore, for the first time in organic solar cells, 1/f noise data are fit to the Kleinpenning model to reveal underlying current fluctuations in different transport regimes. Under illumination, 1/f noise increases by approximately four orders of magnitude for the fullerene‐based OPVs and three orders of magnitude for the PDI‐based OPVs. An inverse correlation is also observed between noise spectral density and power conversion efficiency. Overall, these results show that low‐frequency noise spectroscopy is an effective in situ diagnostic tool to assess charge transport in emerging photovoltaic materials, thereby providing quantitative guidance for the design of next‐generation solar cell materials and technologies.