bluuebunny/crossref_metadata_2025_split huggingface dataset:
Distinguishing between rheophysical regimes of fluid-saturated granular-flows using dilatancy and acoustic emission measurements
Authors: Siman-Tov Shalev , Brodsky Emily E. 
Published: April 2021

AbstractDry granular flows provide an ongoing challenge to physics and under saturation the multiphase physics is even more difficult to disentangle. A rich literature has elucidated the possible regimes achieved, however, the nonlinear nature of the multiphase process makes predicting the appropriate dynamic regime difficult. In this study, we introduce a new experimental strategy to identify the appropriate dynamical regimes by combining traditional methods with acoustic emission measurements. We sheared natural granular materials under dry, water and oil-saturated conditions while recording mechanical, acoustic and visual data. By applying alternate low and high velocity steps we respectively obtained quasi-static and inertial granular flow regimes. Dilation was observed for all high-velocity flows but its amount varied as did the degree of acoustic emission. At high velocities, the water-saturated flow dilated less and had reduced acoustic emissions relative to the dry case. In contrast, the oil-saturated flow dilated more while having even less acoustic emissions. This difference in trends of the dilation and acoustic emissions with increasing fluid viscosity suggests that oil and water granular flows achieved distinct dynamical regimes. Damping of granular pressure by reducing grain collisions and Dilatancy due to fully lubricated contacts are two competing processes influence the saturated shear physics and theoretically expected, but distinguishing between the regimes is difficult to anticipate. The acoustic emissions provide an extra piece of information that allows us to distinguish the physical regimes and determine the competition between processes that control the physics of saturated granular flows in the granular inertial regime.
Efficacy and safety of S-1 following gemcitabine with cisplatin for advanced biliary tract cancer
Authors: Inoue Hiroto , Todaka Akiko , Yamazaki Kentaro , Fushiki Kunihiro , Shirasu Hiromichi , Kawakami Takeshi , Tsushima Takahiro , Hamauchi Satoshi , Yokota Tomoya , Machida Nozomu , Fukutomi Akira , Onozawa Yusuke , Andoh Akira , Yasui Hirofumi 
Published: April 2021

SummaryBackground Combination therapy of gemcitabine with cisplatin (GC) is a standard first-line therapy for unresectable or recurrent biliary tract cancer (BTC). S-1 is often used as a second-line therapy in clinical practice, based on the results of some clinical studies investigating its efficacy and safety following gemcitabine monotherapy. However, few studies have reported on the clinical outcomes of S-1 following GC. The purpose of this study was to elucidate the efficacy and safety of S-1 following GC for unresectable and recurrent BTC. Methods We retrospectively collected the data of 116 patients (pts) who were treated with S-1 as a second-line therapy following GC for unresectable or recurrent BTC at Shizuoka Cancer Center (November 2009 to July 2019). Results Of these 116 pts., 84 were assessable. Patient characteristics were as follows: intrahepatic bile duct/extrahepatic bile duct/gallbladder cancer, 30/23/31 pts.; metastatic/recurrent/locally advanced, 57/17/10 pts. The median time to treatment failure and overall survival were 2.5 and 6.0 months, respectively. Among 65 pts. with measurable lesions, the overall response rate was 3.1% (2/65 pts) and the disease control rate was 24.6% (19/65 pts). The common grade 3/4 toxicities included anemia (12%), neutropenia (4%), infections (16%), fatigue (6%), and diarrhea (4%). Dose reduction or treatment schedule modification of S-1 was required in 29 pts. (34.5%), and 17 pts. (20%) terminated S-1 due to adverse events. Conclusions The efficacy and safety of S-1 following GC were almost the same as those of S-1 following GEM monotherapy for unresectable or recurrent BTC.
Mediating functions and the semantics of noun incorporation
Authors: McKenzie Andrew 
Published: April 2021

AbstractNoun incorporation is commonly thought to avoid the weak compositionality of compounds because it involves conjunction of an argument noun with the incorporating verb. However, it is weakly compositional in two ways. First, the noun’s entity argument needs to be bound or saturated, but previous accounts fail to adequately ensure that it is. Second, non-arguments are often incorporated in many languages, and their thematic role is available for contextual selection.We show that these two weaknesses are actually linked. We focus on the Kiowa language, which generally bars objects from incorporation but allows non-arguments. We show that a mediating relation is required to semantically link the noun to the verb. Absent a relation, the noun’s entity argument is not saturated, and the entire expression is uninterpretable. The mediating relation for non-objects also assigns it a thematic role instead of a postposition. Speakers can choose this role freely, subject to independent constraints from the pragmatics, syntax, and semantics.Objects in Kiowa are in fact allowed to incorporate in certain environments, but we show that these all independently involve a mediating relation. The mediating relation for objects quantifies over the noun and links the noun+verb construction to the rest of the clause. The head that introduces this relation re-categorizes the verb in the syntactic derivation. Essentially, we demonstrate two distinct mechanisms for noun incorporation.Having derived the distribution of Kiowa, we apply the same relations to derive constraints on English complex verbs and synthetic compounds, which exhibit most of the same constraints as Kiowa noun incorporation. We also look at languages with routine object incorporation, and show how the transitivity of the verb depends on whether the "Equation missing"head introducing the external argument assigns case to the re-categorized verb.
Hydrogeochemical framework of groundwater within the Asutifi-North District of the Brong-Ahafo Region, Ghana
Authors: Tay Collins K. 
Published: April 2021

AbstractHydrogeochemical processes responsible for groundwater composition within the Asutifi-North district were assessed. The aim was to delineate the factors influencing groundwater within the district. Results show that the pH values of groundwater within the district are moderately acidic to neutral and ranged from 4.4 to 7.5 with a mean value and standard deviation of 6.1 ± 0.7 pH units. 67.4% of groundwater is acidic (pH 4–6.5) due principally to the influence of aquifer materials on the chemistry of groundwater. Acid mine drainage investigations in groundwater within the district shows that, when exposed, sulphides such as pyrites (FeS2) and arsenopyrite (FeAsS) react with water and oxygen to principally produce Fe(OH)3. The major ion concentrations are within the WHO (2004) Guideline values for drinking water. The relative abundance of cations and anions in groundwater within the district is in the order of: Ca2+  > Na+  > Mg2+  > K+ and HCO3− > Cl− > SO42−, respectively. The study further shows that, albite/anorthite-(plagioclase) and calcite/dolomite(carbonates) dissolution as well as ion-exchange reactions may have contributed significantly to major ion concentrations in groundwater within the district. Hydrochemical facies using Piper trillinear diagrams delineated two major water types, the Ca–Mg–HCO3 and Na–Cl water types, with Ca–Mg–Cl, Ca–Mg–SO4–Cl and Na–K–HCO3 as minor water types. Using principal component analysis (PCA), three (3) main principal components accounting for 73.1% of the total variance with eigenvalues > 1 were extracted. PCA delineated the main natural processes through which groundwater within the district acquires its chemical characteristics, the incongruent dissolution of silicate/aluminosilicates and the prevalence of pollution principally from the application of inorganic fertilizers such as nitrates and ammonia via agricultural activities within the district.
Combustion characteristics of high ash Indian thermal, heat affected coal and their blends
Authors: Aich Subhajit , Nandi Barun Kumar , Bhattacharya Sumantra 
Published: April 2021

AbstractOnsite mine fire generates large volumes of heat-affected coal in Jharia coalfields, India. Direct utilization of such heat-affected coal in thermal utilities is not feasible as such coal does not have the desirable volatile matter required for combustion. In the present work, experimental studies have been carried out to investigate the possible utilization of such heat-affected coal in thermal utilities by blending with other coal. Heat-affected coal (31% ash and 5300 kcal/kg GCV) collected from Jharia coalfield were blended with thermal coal (28% ash and 5650 kcal/kg GCV) in different ratios of 90:10, 80:20, 70:30 and 60:40 to identify the desirable blend ratio for burning of blended coal in thermal utilities. Burning characteristics of all the coals were carried out using TGA. Various combustion parameters such as ignition temperature, peak temperature, burnout temperature, ignition index, burnout index, combustion performance index, rate and heat intensity index of the combustion process and activation energy were evaluated to analyse the combustion process. Experimental and theoretical analysis shows the blend ratio of 90:10 can be used in place of only thermal coal in utilities to reduce the fuel cost.
Simulating the performance of a highly efficient CuBi2O4-based thin-film solar cell
Authors: Hosen Adnan , Mian Md. Suruz , Ahmed Sheikh Rashel Al 
Published: April 2021

AbstractIn this study, copper bismuth oxide (CuBi2O4) absorber-based thin film heterojunction solar cell structure consisting of Al/FTO/CdS/CuBi2O4/Ni has been proposed. The proposed solar cell device structure has been modeled and analyzed by using the solar cell capacitance simulator in one dimension (SCAPS-1D) software program. The performance of the proposed photovoltaic device is evaluated numerically by varying thickness, doping concentrations, defect density, operating temperature, back metal contact work function, series and shunt resistances. The current density–voltage behaviors at dark and under illumination are investigated. To realize the high efficiency CuBi2O4-based solar cell, the thickness, acceptor and donor densities, defect densities of different layers have been optimized. The present work reveals that the power conversion efficiency can be enhanced by increasing the absorber layer thickness. The efficiency of 26.0% with open-circuit voltage of 0.97 V, short-circuit current density of 31.61 mA/cm2, and fill-factor of 84.58% is achieved for the proposed solar cell at the optimum 2.0-μm-thick CuBi2O4 absorber layer. It is suggested that the p-type CuBi2O4 material proposed in the present study can be employed as a promising absorber layer for applications in the low cost and high efficiency thin-film solar cells.
Impact of Mixed Reality Presentation on STEM Engagement and Comprehension: A Pilot Study on Adult Scientists
Authors: Geller Peter , Stein Jaymie , Du Daniel , Webb Jason R. , Lieberman Zack , Shreiber David , Parekkadan Biju 
Published: April 2021

AbstractCurrent educational presentation software used in STEM education fail to maximize student engagement and comprehension. Mixed reality presentation is one specific type of digital presentation software that has shown to significantly improve student engagement and comprehension. In this paper, we describe a pilot study on adult scientists which evaluates the usage of an integrated mixed reality presentation software in the Zyndo platform as an enhanced alternative to Adobe PDFs. A group of adult scientists (N = 20), with higher education of at least a bachelor’s degree, from an academic research center at Harvard Medical School were randomized and asked to read two articles (one on Immunology and the other on Bioengineering) presented through either the mixed reality presentation or PDFs. Our results indicate that participants improved in nearly all metrics for engagement (ranging from + 4 to 51% improvement depending on engagement metric and subject matter) when viewing the mixed reality presentation over the traditional PDFs for both articles. Specifically, the participants demonstrated improved comprehension of the scientific content and time spent viewing the presentation in a content-dependent manner. Therefore, 3D mixed reality environments can potentially be applied to enhance student learning in STEM fields, particularly Biomedical Engineering in both on-line and in person classroom settings.
Poor Law Institutions through Working-Class Eyes: Autobiography, Emotion, and Family Context, 1834–1914
Authors: Tomkins Alannah 
Published: April 2021

AbstractHistories of the English workhouse and its satellite institutions have concentrated on legal change, institutional administration, and moments of shock or scandal, generally without considering the place of these institutions, established through the Poor Law Amendment Act of 1834, in the emotional life course of poor inmates. This article uses working-class autobiographies to examine the register of emotional responses to workhouses and associated Poor Law institutions, and the range of narrative voices open to authors who recalled institutional residence. It also gives close attention to two lengthy narratives of workhouse district schools and highlights their significance in comparison to the authors’ family backgrounds and the representation of each writer in the wider historical record. It suggests that a new affective chronology of the workhouse is needed to accommodate room for disparity between the aspiration of systematic poor relief and the reality of individual experience within local interpretations of the law.
The Sound of Politics in Early Nineteenth-Century Ireland
Authors: Barclay Katie 
Published: April 2021

AbstractIn the early 1800s, Jonah Barrington, an Irish judge, bemoaned that the air chosen as the march for the Irish Volunteer Movement had “no merit whatever, being neither grand, nor martial, nor animating,” contrasting it with the zeal of French revolutionary music. The emotional impact of music might be a matter of taste, but such a statement is suggestive of an aesthetics, where political music, or music used for political purposes, should have specific qualities that could be identified and judged by listeners. This article explores how people in late eighteenth- and early nineteenth-century Ireland identified music as political, using theories of the effects and affects of sound during the period and a corpus of Irish political music as an access point into historical experiences of musical enjoyment. While the impacts of music on the body are challenging for historians to retrieve, scholarship from the history of emotions highlights the important role of normative frameworks of emotion in accessing embodied experience. Working from this perspective, this article argues that we can begin to access the sound of politics for audiences of this period, contributing to our understanding of the role of music in political life.
An Empire of Free Ports: British Commercial Imperialism in the 1766 Free Port Act
Authors: Kleiser R. Grant 
Published: April 2021

AbstractThe Free Port Act of 1766 was an important reform in British political economy during the so-called imperial crisis between the Seven Years’ War (1756–1763) and the American Revolution (1775–1783). In an explicit break from the letter if not the spirit of the Navigation Acts, the act opened six British ports in the West Indies (two in Dominica and four in Jamaica) to foreign merchants trading in a highly regulated number of goods subject to various duties. Largely understudied, this legislation has been characterized in most previous work on the subject as a fundamental break from British mercantile policies and meant to benefit North American colonial merchants. This article proposes a different interpretation. Based on the wider context of other imperial free port models, the loss of conquests such as French Guadeloupe and Martinique and Spanish Havana in the 1763 Paris Peace Treaty, a postwar downturn in Anglo-Spanish trade, and convincing testimonies by merchants and colonial observers, policy makers in London conceived of free ports primarily as a means of extending Britain's commercial empire. The free port system was designed to ruin the rival Dutch trade economically and shackle Spanish and French colonists to Britain's mercantile, manufacturing, and slaving economies. The reform marks a key moment in the evolution of British free trade imperial designs that became prevalent in the nineteenth century and beyond.
Revision of “Dependence of Climate States of Gray Atmosphere on Solar Constant: From the Runaway Greenhouse to the Snowball States” by Ishiwatari et al. (2007)
Authors: Ishiwatari M. , Nakajima K. , Takehiro S. , Hayashi Y.‐Y. , Kawai Y. , Takahashi Y. O. 
Published: April 2021

AbstractIshiwatari et al. (2007) (https://doi.org/10.1029/2006JD007368) investigated multiple equilibrium solutions of a gray atmosphere for various values of solar constant, utilizing two types of models, namely, a one‐dimensional energy balance model and a general circulation model (GCM) with simplified physical processes, both of which permit existence of the runaway greenhouse state. The study was retracted, since there was a bug in their GCM that affected quantitative aspects of the study. Here, we revise the study with re‐performing all of the GCM experiments using an appropriately corrected model. The results of re‐experiments show that the main features of the climate regime diagram drawn in the solar constant ‐ ice line latitude plane are mostly unchanged, except that the ice‐free equilibrium state, which existed in Ishiwatari et al. (2007) (https://doi.org/10.1029/2006JD007368) now disappears. It is confirmed that there are the partially ice‐covered state, the globally ice‐covered state, and the runaway greenhouse state. These three states coexist for intermediate values of solar constant. The existence of the large ice cap instability is also confirmed, although the critical latitude of the partially ice‐covered state extends equatorward. Also same as before, the small ice cap instability does not seem to appear.
The Effect of Sea Ice on Tidal Propagation in the Kitikmeot Sea, Canadian Arctic Archipelago
Authors: Rotermund Lina M. , Williams William J. , Klymak Jody M. , Wu Yongsheng , Scharien Randall K. , Haas Christian 
Published: April 2021

AbstractThe tides in the Kitikmeot Sea, in the southern Canadian Arctic Archipelago, are found to be heavily influenced by seasonal sea‐ice formation and blocking in a strait. Data from a moored current profiler in Dease Strait exhibit strong tidal damping during wintertime seasonal sea‐ice cover, with 50%–60% reduction in tidal elevation and 65% reduction in tidal velocities. We used a 3D unstratified barotropic numerical tidal model of the region to show that the observed wintertime tidal damping likely requires both high sea‐ice friction and a partial sea‐ice blockage in Victoria Strait (VS), the eastern gateway of the Kitikmeot Sea, where tidal‐induced ridging causes thick, rough ice to accumulate over its shallow sill. Our analysis of the model shows different dynamics for the M2 and K1 tides. Both tidal constituents are dominated by the Atlantic tides entering through VS. Overall, ∼90% of the M2 tidal energy entering VS does not reach Dease Strait because, in addition to dissipation in VS (∼25%), it is significantly diverted into adjoining bays and around an amphidrome in eastern Queen Maud Gulf (∼65%). In contrast, the smaller K1 tide is less diverted into the subsidiary channels, after ∼20% dissipation in VS and only ∼25% in adjoining bays, it propagates far into the region and is amplified due to resonance in Dease Strait and Coronation Gulf, resulting in larger tidal height than the M2 tide in Coronation Gulf.
A 30 ‐Year Time Series of Transient Tracer‐Based Estimates of Anthropogenic Carbon in the Central Labrador Sea
Authors: Raimondi L. , Tanhua T. , Azetsu‐Scott K. , Yashayaev I. , Wallace D.W.R. 
Published: April 2021

AbstractWe use a 30‐year time series (1986–2016) of dichlorodifluoromethane (CFC‐12) concentrations with a refined transit time distribution (TTD) method, to estimate the temporal variation of anthropogenic carbon (Cant) in the Central Labrador Sea. We determined that the saturation of CFC‐12 and sulfur hexafluroide (SF6) in newly‐formed Labrador Sea Water had departed significantly from 100% and varied systematically with time. Multiple linear regression of the time‐varying saturation, with the tracer's atmospheric growth rate and the wintertime mixed layer depth as independent variables, allowed reconstruction of the saturation history of CFC‐12 and SF6 in wintertime surface waters, which was implemented in the TTD method. Use of the time‐varying saturation for CFC‐12 gave Cant concentrations ∼7 μmol kg−1 larger than estimates obtained assuming a constant saturation of 100%. The resulting Cant column inventories were ∼20% larger and displayed lower interannual variability compared to conventional TTD‐based estimates. The column inventory of Cant increased at an average rate of 1.8 mol m−2 y−1 over the 30‐year period. However, the accumulation rate of Cant was higher than this average in the early 1990s and since 2013, whereas inventories remained almost unchanged between 2003 and 2012. The variation in the Cant accumulation rate is shown to be linked to temporal variability in the relative layer thickness of the annually ventilated Labrador Sea Water and the underlying Deep Intermediate Water. The non‐steady Cant accumulation highlights the importance of sampling frequency, especially in regions of variable deep mixing and high carbon inventories, and potential misinterpretation of Cant dynamics.
Sediment Mobilization by Hurricane‐Driven Shallow Landsliding in a Wet Subtropical Watershed
Authors: Ramos‐Scharrón C. E. , Arima E. Y. , Guidry A. , Ruffe D. , Vest B. 
Published: April 2021

AbstractThe role of individual tropical cyclones in mobilizing sediment by shallow landsliding has been studied widely in islands of the Pacific but hardly within the Insular Caribbean. An opportunity to conduct such a study materialized in 2017 when Hurricane María provoked over 70,000 landslides on the island of Puerto Rico. Through aerial photo interpretation and high‐resolution digital elevation models, this study provides an estimate of the net mobilization and delivery of sediment by shallow landslides in a wet subtropical and actively cultivated 43.8 km2 watershed. Landslide mobilization and delivery are contextualized here in terms of other active sources of sediment and annual sediment delivery. Maximum hourly and 24‐h average rain intensities within the study watershed during Hurricane María were 68 and 10.2 mm h−1, respectively, and these represent intensities with local recurrence intervals of less than 10 years. However, these rain intensities were sufficient to trigger 2,318 landslides that mobilized 230,510–436,330 Megagrams of sediment, an amount that is much greater than surface erosion contributions and represents the equivalent of 0.5–3.6 years of annual watershed‐scale sediment delivery. The high susceptibility to landsliding in this region of Puerto Rico is linked to the abundance of roads (∼21 km km−2), particularly those crisscrossing terrain with slopes ranging from 30° to 60°. Only 15% of these roads are within actively cultivated areas. The remaining roads represent the support infrastructure of abandoned coffee farms that still appear to be inducing a legacy of much geomorphological and watershed management relevance.