bluuebunny/crossref_metadata_2025_split huggingface dataset:
From Ambivalence to Accuracy: The Provisional Government’s Grain Registration in an Intermediary Province, Penza 1917
Authors: Fraunholtz Peter 
Published: January 2024

AbstractAmong the the existing studies of the 1917 food‐supply crisis none has examined in detail the role and impact of grain registration. This article fills that gap by investigating the implementation of grain registration in Penza province, thus adding to and complicating the increasingly decentered picture of food‐supply policy and its impact in 1917. This study asserts that a major turning point during 1917 was the poor Volga harvest, which contributed to the threat of a prolonged subsistence crisis in an intermediary province already enduring the collapse of critical resupply channels. In this context, initially ambivalent volost officials and peasants came to embrace grain registration in the post‐harvest period as a way to document a legitimate claim to receive grain. This article adds to our understanding of the variability of peasant agency exhibited during 1917. The main post‐harvest struggle was over competing interpretations of the registration process between volost and district officials. The latter were pressed by provincial and central superiors to increasingly utilize armed force, not to compel compliance with registration, but to hasten the delivery of grain to urban consumers. This study illustrates how the Provisional government’s turn to state violence to establish its procurement authority was a function of how its policies, combined with deteriorating local conditions, produced competing entitlements to grain. Rather than a continuum of crisis in which Provisional government food‐supply policies repeatedly exacerbated crisis by failing to overlap with local demands and provoked resistance among grain producers and consumers, a combination of state and non‐state factors produced an economic environment in which the interests of both volost officials and peasants were served by key features of the state grain monopoly, especially grain registration.
Towards liminal balance: Unpacking the UK's urban canal space
Authors: Kaaristo Maarja , Medway Dominic , Rhoden Steven , Burton Jamie , Bruce Helen 
Published: January 2024

AbstractThis paper critically examines the liminal geographies of the United Kingdom's 7,000‐mile canal and river network, embodying a thread of complex intersections and interactions between water and land. Drawing on a study involving stakeholder interviews, group discussion with canal users, and observational walks in Manchester and London, the paper explores the concepts of liminal flux, scalar intersections, and deliminalisation. We first outline how the UK's urban canals are characterised by liminal flux over time and space, reflecting their dynamic geographies. Revealing the presence of critical intersections between liminality and scale, we then focus on the ongoing and everyday spatial and territorial entanglements between different canal and towpath users. Finally, we consider the challenge of deliminalisation, and an associated shift from liminality and in‐betweenness towards greater spatial fixity via neoliberal intervention and development. Our findings highlight the importance of preserving the unique characteristics of urban canals as liminal spaces, arguing that they provide recreational opportunities and contribute to urban wellbeing by providing opportunities for ‘transitory dwelling places’. Maintaining a liminal balance within urban canal environments is therefore crucial and requires careful curation. In turn, this notion of curating liminal balance has implications for other potential waterfront developments that offer a similar positive potential for hydrocitizenship and its fluid ambiguities of in‐betweenness. Moreover, it demonstrates the importance of a ‘lighter touch’ of redevelopment and governance in some parts of the urban environment to help preserve, or even enhance, citizen wellbeing.
Tiling billards on triangle tilings, and interval exchange transformations
Authors: Baird‐Smith Paul , Davis Diana , Fromm Elijah , Iyer Sumun 
Published: January 2024

AbstractWe consider the dynamics of light rays in triangle tilings where triangles are transparent and adjacent triangles have equal but opposite indices of refraction. We find that the behavior of a trajectory on a triangle tiling is described by an orientation‐reversing three‐interval exchange transformation on the circle, and that the behavior of all the trajectories on a given triangle tiling is described by a polygon exchange transformation. We observe that, for a particular choice of triangle tiling, certain trajectories appear to approach the Rauzy fractal, under rescaling.
Evaluation of an Elastomeric Honeycomb Bicycle Helmet Design to Mitigate Head Kinematics in Oblique Impacts
Authors: King Annie R. A. , Rovt Jennifer , Petel Oren E. , Yu Bosco , Quenneville Cheryl E. 
Published: January 2024

Abstract
Head impacts in bicycle accidents are typically oblique to the impact surface and transmit both normal and tangential forces to the head, causing linear and rotational head kinematics, respectively. Traditional expanded polystyrene (EPS) foam bicycle helmets are effective at preventing many head injuries, especially skull fractures and severe traumatic brain injuries (TBIs) (primarily from normal contact forces). However, the incidence of concussion from collisions (primarily from rotational head motion) remains high, indicating need for enhanced protection. An elastomeric honeycomb helmet design is proposed herein as an alternative to EPS foam to improve TBI protection and be potentially reusable for multiple impacts, and tested using a twin-wire drop tower. Small-scale normal and oblique impact tests showed honeycomb had lower oblique strength than EPS foam, beneficial for diffuse TBI protection by permitting greater shear deformation and had the potential to be reusable. Honeycomb helmets were developed based on the geometry of an existing EPS foam helmet, prototypes were three-dimensional-printed with thermoplastic polyurethane and full-scale flat and oblique drop tests were performed. In flat impacts, honeycomb helmets resulted in a 34% higher peak linear acceleration and 7% lower head injury criteria (HIC15) than EPS foam helmets. In oblique tests, honeycomb helmets resulted in a 30% lower HIC15 and 40% lower peak rotational acceleration compared to EPS foam helmets. This new helmet design has the potential to reduce the risk of TBI in a bicycle accident, and as such, reduce its social and economic burden. Also, the honeycomb design showed potential to be effective for repetitive impact events without the need for replacement, offering benefits to consumers.
Variability in Body Shape, Superficial Soft Tissue Geometry, and Seatbelt Fit Relative to the Pelvis in Automotive Postures—Methods for Volunteer Data Collection With Open Magnetic Resonance Imaging
Authors: Forman Jason , Booth Gabrielle , Mergler Olivia , Romani Sarah , Zhang Honglin , Roberts Carolyn , Siegmund Gunter P. , Pipkorn Bengt , Cripton Peter 
Published: January 2024

Abstract
Variability in body shape and soft tissue geometry have the potential to affect the body's interaction with automotive safety systems. In this study, we developed a methodology to capture information on body shape, superficial soft tissue geometry, skeletal geometry, and seatbelt fit relative to the skeleton—in automotive postures—using Open Magnetic Resonance Imaging (MRI). Volunteer posture and belt fit were first measured in a vehicle and then reproduced in a custom MRI-safe seat (with an MR-visible seatbelt) placed in an Open MR scanner. Overlapping scans were performed to create registered three-dimensional reconstructions spanning from the thigh to the clavicles. Data were collected with ten volunteers (5 female, 5 male), each in their self-selected driving posture and in a reclined posture. Examination of the MRIs showed that in the males with substantial anterior abdominal adipose tissue, the abdominal adipose tissue tended to overhang the pelvis, narrowing in the region of the Anterior Superior Iliac Spine (ASIS). For the females, the adipose tissue depth around the lower abdomen and pelvis was more uniform, with a more continuous layer superficial to the ASIS. Across the volunteers, the pelvis rotated rearward by an average of 62% of the change in seatback angle during recline. In some cases, the lap belt drew nearer to the pelvis as the volunteer reclined (as the overhanging folds of adipose tissue stretched). In others, the belt-to-pelvis distance increased as the volunteer reclined. These observations highlight the importance of considering both interdemographic and intrademographic variability when developing tools to assess safety system robustness.
A Deep Learning Approach to Predict In-Cylinder Pressure of a Compression Ignition Engine
Authors: Ristow Hadlich Rodrigo , Loprete Jason , Assanis Dimitris 
Published: January 2024

Abstract
As emissions regulations for greenhouse gas emissions become more strict, it is important to increase the efficiency of engines by improving on the design and operation. Current optimization methods involve performing large numbers of experimental investigations on physical engines or making use of detailed Computational Fluid Dynamics modeling efforts to provide visual and statistical insights on in-cylinder behavior. The latter still requires experimental data for model validation. Both of these methods share a common set of problems, that of being monetarily expensive and time consuming. Previous work has proposed an alternative method for engine optimization using machine learning (ML) models and experimental validation data to predict scalar values representing different parameters. With such models developed, one can then quickly iterate on operating conditions to find the point that maximizes an application-dependent reward function. While these ML methods provide information on individual performance parameters, they lack key information of in-cylinder indicators such as cylinder pressure traces and heat release curves that are traditionally used for performance analysis. This work details the process of implement- ing a Multilayer Perceptron (MLP) model capable of accurately predicting crank-angle resolved high-speed in-cylinder pressure using equivalence ratio, fuel injection pressure and injection timing as input features. It was demonstrated that the model was able to approximate engine behavior with mean squared error lower than 0.05 on a 1-55 range in the test set. This approach shows potential for greatly accelerating the optimization process in engine applications.
A Phenomenological Thermal Spray Wall Interaction Modeling Framework Applied to a High-Temperature Ignition Assistant Device
Authors: Oruganti Surya Kaundinya , Torelli Roberto , Kim Kenneth S. , Mayhew Eric , Kweon Chol-Bum “Mike” 
Published: January 2024

Abstract
Airborne compression ignition engines must operate with reliable ignition systems to achieve proper ignition at every cycle, particularly at high altitudes. Glow-plug-based ignition-assistant (IA) devices can provide the necessary energy to preheat the fuel and ensure ignitability of the fuel-air mixture. Ignitability of liquid sprays can be facilitated via direct impingement onto the hot IA surface, however this comes with adverse effects on the IA durability. Therefore, optimizing an IA's design requires detailed understanding of the physics of fuel spray impingement of superheated surfaces. While spray impingement on relatively low wall temperatures has been extensively studied and appropriate numerical models have been proposed through the years, fundamental understanding of high-speed liquid spray impingement on superheated walls is still elusive. This work aims to formulate a phenomenological thermal spray-wall interaction framework for modeling the film-boiling-induced heat transfer, atomization, and dispersion of fuel spray droplets impinging onto a superheated IA device. A qualitative comparison of the new phenomenological model is performed against optical experiments from the literature of an F-24 fuel spray injected onto an IA device located 12 mm away from the injector tip. The temperature of the IA was set at 1400 K. The fuel injection pressure was 400 bar, while the ambient gas pressure and temperature were 30 bar and 800 K, respectively. The performance of the phenomenological model is evaluated in comparison with two other state-of-art models from the literature. A qualitative analysis of the different spray and fuel-air mixture characteristics is performed to outline the differences in the predictions offered by the new phenomenological model and the two state-of-art spray-wall interaction models.
Influence of Accelerometer Calibration on the Estimation of Objectively Measured Physical Activity: The Tromsø Study
Authors: Weitz Marc , Morseth Bente , Hopstock Laila A. , Horsch Alexander 
Published: January 2024

Accelerometers are increasingly used to observe human behavior such as physical activity under free-living conditions. An important prerequisite to obtain reliable results is the correct calibration of the sensors. However, accurate calibration is often neglected, leading to potentially biased results. Here, we demonstrate and quantify the effect of accelerometer miscalibration on the estimation of objectively measured physical activity under free-living conditions. The total volume of moderate to vigorous physical activity (MVPA) was significantly reduced after post hoc auto-calibration for uniaxial and triaxial count data, as well as for Euclidean Norm Minus One and mean amplitude deviation raw data. Weekly estimates of MVPA were reduced on average by 5.5, 9.2, 45.8, and 4.8 min, respectively, when compared to the original uncalibrated estimates. Our results indicate a general trend of overestimating physical activity when using factory-calibrated sensors. In particular, the accuracy of estimates derived from the Euclidean Norm Minus One feature suffered from uncalibrated sensors. For all modalities, the more uncalibrated the sensor was, the more MVPA was overestimated. This might especially affect studies with lower sample sizes.
Slender Man’s Face: the Religious Foundation of an Online Mythology
Authors: Asimos Vivian 
Published: January 2024

Abstract
In 2009, the internet gave birth to a monster. The Slender Man, like many other forms of online storytelling, is a product of mass communal storytelling. What has led to the Slender Man’s unique long-lasting position online is in part due to the way the community initially dealt with the issues which arose in mass communal storytelling. These issues are primarily found in two modes: 1) the inconsistency of the narrative, which is typically related to the creative freedom given to every member of a community, which was solved using apophatic theology; and 2) the reality of the scare, which begins to lose traction when the narrative is online and thus easily searchable, solved through the notion of the Tulpa. Participants play with knowledge and religious conceptions, through which mimetic excess occurs (Taussig, 1993), leading to a crossing of boundaries between reality and fiction.
Influence of Tropical Easterly Waves on the ChocoJet during the 2019 OTREC Campaign
Authors: Valencia Juliana , Yepes Johanna , Mejía John F. , Builes-Jaramillo Alejandro , Salas Hernán D. 
Published: January 2024

Abstract
This study investigates how convectively coupled tropical easterly waves (TEWs) affect the Choco low-level jet (ChocoJet) as they move across the western Caribbean. The ChocoJet is a low-level flow over the eastern Pacific (EPAC) that modulates precipitation patterns over the tropical eastern Pacific and northwestern South America. By combining data from the Organization of Tropical East Pacific Convection (OTREC; August–September 2019), ERA5 reanalysis products, and satellite data, we analyze precipitation and circulation patterns during convectively coupled and nonconvectively coupled TEWs, comparing them to non-TEW days. During convectively coupled TEWs days, the ChocoJet strengthens and becomes more southerly, while the ITCZ moves northward, leading to enhanced precipitation over the western Caribbean and drier conditions over the northern part of the Colombian Pacific. In contrast, nonconvectively coupled TEW days exhibit reduced precipitation and precipitable water over the Caribbean and far EPAC, with a layer of northeasterly flow centered at 850 hPa flowing over a shallower, weaker, and more westerly ChocoJet. Additionally, convectively coupled TEWs are associated with a weaker western Caribbean and far eastern Pacific pressure gradient compared to nonconvective TEWs. These observable and predictable synoptic-scale circulation–precipitation relationships contribute to a better understanding of hydrometeorological variability in the region.

Significance Statement
Tropical easterly waves and related convective organization traversing the Caribbean Sea are important sources of synoptic-scale precipitation–circulation variability in the far eastern Pacific and Colombian Pacific. This eastern tropical Pacific study aims to identify precipitation–circulation relationships that enhance the understanding of synoptic-scale meteorological phenomena.
Wave Spectra Analysis on the Spatiotemporal Variability of Sea States under Distinct Typhoon Tracks in a Semienclosed Sea
Authors: Peng Jie , Mao Miaohua , Xia Meng 
Published: January 2024

Abstract
The dynamics of typhoon-induced waves in semienclosed seas become an interesting topic with the increase of typhoon intensity. Based on the calibrated Simulating Waves Nearshore (SWAN) model, wave dynamics were investigated under distinct typhoon tracks [e.g., Matmo (2014), Rumbia (2018), and Lekima (2019)] in the Bohai Sea. Distributions of significant wave heights (SWHs) are affected by the typhoon wind fields and are directly related to the typhoon tracks. The classical JONSWAP wave spectra were adopted for the analysis of sea states (e.g., wind seas or swells) to further explain variations in wave heights. Results indicate that the dominant sea state with higher energy experiences significant spatiotemporal variability under distinct tracks. For typhoons passing through the central part of the Bohai Sea (e.g., Rumbia), high-energy waves are observed under swell-dominated and mixed sea states, which are subjected to the fetch limitation in the semienclosed sea and rapid changes in typhoon winds. The high energy waves induced by other typhoons passing along the edges of the Bohai Sea correspond to the wind-sea-dominated sea state. Spatiotemporal variability of the sea state exhibits a high correlation with its position relative to the typhoon center. Therefore, a reference frame based on the radius of the maximum wind speed was established to discuss the sea states in this semienclosed sea. Further investigations reveal that swells (wind seas) dominate the regions within the radius of the maximum wind speed (elsewhere), and the double-peaked wave spectra tend to appear in the left quadrants.
Comparing Test-Taking Effort Between Paper-Based and Computer-Based Tests
Authors: Weirich Sebastian , Sachse Karoline A. , Henschel Sofie , Schnitzler Carola 
Published: January 2024

The article compares the trajectories of students’ self-reported test-taking effort during a 120 minutes low-stakes large-scale assessment of English comprehension between a paper-and-pencil (PPA) and a computer-based assessment (CBA). Test-taking effort was measured four times during the test. Using a within-subject design, each of the N = 2,676 German ninth-grade students completed half of the test in PPA and half in CBA mode, where the sequence of modes was balanced between students. Overall, students’ test-taking effort decreased considerably during the course of the test. On average, effort was lower in CBA than in PPA. While on average, effort was lower in CBA than in PPA, the decline did not vary between both modes during the test. That is, students’ self-reported effort was higher if the items were easier (compared to students’ abilities). The consequences of these results concerning the further development of CBA tests and large-scale assessments in general are discussed.
Crashworthiness investigations for 3D printed multi-layer multi-topology carbon fiber nylon lattice materials
Authors: Bernard Autumn R. , Yalcin Muhammet Muaz , ElSayed Mostafa S.A. 
Published: January 2024

Cellular solids have superior energy absorption capabilities as compared to monolithic materials. Within this category of materials, lattice materials are of particular interest since their periodicity offers repeatable – and thus predictable – behavior. In combination with the advancements in additive manufacturing technologies, these lattice materials can be highly customized for a desired response. In this paper, the crashworthiness of unique multi-layer, multi-topology (MLMT) lattices is investigated. First, the nylon-carbon fiber composite material properties within a developed numerical model were tuned based on strut orientation. Then, the response of single-layer and three-layer cubic and octet lattices was investigated, where all lattices were designed with a relative density of 30%. Following the characterization of single-topology lattices, the response of MLMT lattices were investigated. Stress-strain, efficiency-strain, and multiple crashworthiness parameter data was collected for all lattices to facilitate in the comparison of those lattices. It was found that, experimentally, the unique MLMT lattices did not absorb more energy than their constituent layers combined, though modifications to the interface between layers could increase the energy absorption capability; the prediction of energy absorption of the MLMT lattices based on constituent layers was similar to actual numerical results. As all lattices were designed at the same relative density, the mass-specific energy absorption of the cubic-octet-cubic MLMT lattice (1.56 x103 J/kg) outperforms the single-topology octet lattice by 19% to 36% (1.15–1.31 x103 J/kg). While the octet-cubic-octet MLMT lattice (0.71 x103 J/kg) is outperformed by the single-topology cubic lattices (1.69–3.76 x103 J/kg), they see an increase of 59% to 77% in plateau stress (5.1–9.2 MPa) as compared to the MLMT lattice (2.1 MPa).