bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fabrication of magnetic helical microribbons made of nickel thin films sandwiched between silicon nitride layers for microswimming applications
Authors: Shojaeian Milad , Caldag Hakan Osman , Bozkurt Ayhan , Yesilyurt Serhat 
Published: September 2022

Abstract
Helical swimming is adopted by microswimming robots since it is an efficient mechanism and commonly observed among microorganisms swimming at low Reynolds numbers. However, manufacturing of micro-helices made of sub-micron magnetic thin layers is neither straightforward nor well-established, advanced materials and methods are necessary to obtain such structures as reported in the literature. In this paper, a topological patterning method utilizing basic microfabrication methods is presented for the self-assembly of magnetic micro-helices made of a sandwiched nickel thin film (50–150 nm) between two silicon nitride layers. Strain mismatch between the thin films and the geometric anisotropy introduced by the slanted patterns on the top nitride layer result in self-rolled-up helical microribbons. Moreover, inspired by the actual release process during the wet-etching of the microribbon from the substrate, moving boundary conditions are incorporated in a numerical model to simulate the self-rolling of trilayer ribbons. The simulation results are compared and validated by experimental data within 7% error for all cases, including the geometries that do not result in a helical shape. The swimming performance of the magnetized micro-helix is demonstrated inside a capillary glass tube experimentally and cross-validated with a numerical model.
Two-stage superconductivity in the Hatsugai–Kohomoto-BCS model
Authors: Li Yu , Mishra Vivek , Zhou Yi , Zhang Fu-Chun 
Published: September 2022

Abstract
Superconductivity in strongly correlated electrons can emerge out from a normal state that is beyond the Landau’s Fermi liquid paradigm, often dubbed as ‘non-Fermi liquid’. While the theory for non-Fermi liquid is still not yet conclusive, a recent study on the exactly-solvable Hatsugai–Kohomoto (HK) model has suggested a non-Fermi liquid ground state whose Green’s function resembles the Yang–Rice–Zhang ansatz for cuprates (2020 Phillips et al Nat. Phys.
16 1175). Similar to the effect of on-site Coulomb repulsion in the Hubbard model, the repulsive interaction in the HK model divides the momentum space into three parts: empty, single-occupied and double-occupied regions, that are separated from each other by two distinct Fermi surfaces. In the presence of an additional Bardeen–Cooper–Schrieffer-type pairing interaction of a moderate strength, we show that the system exhibits a ‘two-stage superconductivity’ feature as temperature decreases: a first-order superconducting transition occurs at a temperature T
c that is followed by a sudden increase of the superconducting order parameter at a lower temperature

T

c

′

<

T

c

. At the first stage,

T

c

′

<
T
<

T

c

, the pairing function arises and the entropy is released only in the vicinity of the two Fermi surfaces; while at the second stage,

T
<

T

c

′

, the pairing function becomes significant and the entropy is further released in deep (single-occupied) region in the Fermi sea. The phase transitions are analyzed within the Ginzburg–Landau theory. Our work sheds new light on unconventional superconductivity in strongly correlated electrons.
Electronic viscous boundary layer in gated graphene
Authors: Cosme P , Santos J S , Terças H 
Published: September 2022

Abstract
We investigate the boundary layer problem in viscous electronic flows in gated graphene. Recent experiments on graphene hydrodynamics indicate the emergence of non-Poiseuille behavior, a feature that we reproduce with direct numerical simulations of gated graphene electrons. In fact, the velocity profile displays a maximum value close to the boundary and then decreases as it approaches the bulk. By taking into account the compressibility of the electron fluid, that arises from the dependence of effective hydrodynamic mass on the number density, we derive a generalized Blasius equation governing the transverse velocity profile, in excellent agreement with the simulation results. Evidence of a non-monotonic profile and further deviations with respect to incompressible (classical) hydrodynamics may shed some light on the subject of non-topological edge currents in graphene.
Assessing HD-EEG functional connectivity states using a human brain computational model
Authors: Tabbal Judie , Kabbara Aya , Yochum Maxime , Khalil Mohamad , Hassan Mahmoud , Benquet Pascal 
Published: September 2022

Abstract

Objective. Electro/Magnetoencephalography (EEG/MEG) source-space network analysis is increasingly recognized as a powerful tool for tracking fast electrophysiological brain dynamics. However, an objective and quantitative evaluation of pipeline steps is challenging due to the lack of realistic ‘controlled’ data. Here, our aim is two-folded: (a) provide a quantitative assessment of the advantages and limitations of the analyzed techniques and (b) introduce (and share) a complete framework that can be used to optimize the entire pipeline of EEG/MEG source connectivity. Approach. We used a human brain computational model containing both physiologically based cellular GABAergic and Glutamatergic circuits coupled through Diffusion Tensor Imaging, to generate high-density EEG recordings. We designed a scenario of successive gamma-band oscillations in distinct cortical areas to emulate a virtual picture-naming task. We identified fast time-varying network states and quantified the performance of the key steps involved in the pipeline: (a) inverse models to reconstruct cortical-level sources, (b) functional connectivity measures to compute statistical interdependency between regional signals, and (c) dimensionality reduction methods to derive dominant brain network states (BNS). Main results. Using a systematic evaluation of the different decomposition techniques, results show significant variability among tested algorithms in terms of spatial and temporal accuracy. We outlined the spatial precision, the temporal sensitivity, and the global accuracy of the extracted BNS relative to each method. Our findings suggest a good performance of weighted minimum norm estimate/ Phase Locking Value combination to elucidate the appropriate functional networks and ICA techniques to derive relevant dynamic BNS. Significance. We suggest using such brain models to go further in the evaluation of the different steps and parameters involved in the EEG/MEG source-space network analysis. This can reduce the empirical selection of inverse model, connectivity measure, and dimensionality reduction method as some of the methods can have a considerable impact on the results and interpretation.
Quantification and characterization of household waste in Dumai Timur District, Dumai City, Riau, Indonesia as a measure towards circular economy.
Authors: Hidayat Fauzan , Martono Dwi Nowo , Hamzah Udi Syahnoedi 
Published: September 2022

AbstractDumai City, located in Riau Province is the second largest city in Indonesia and is also currently facing problems with solid waste management as the population continues to grow. Dumai Timur District is the most populated district in Dumai City with 68.980 people. The Municipal Solid Waste (MSW) in Dumai Timur District- particularly the plastic waste, paper, and metal; is expected to have some economic potential if seen from the Circular Economy (CE) perspective. Therefore, this study is conducted to quantify and characterize the MSW generated in Dumai Timur District and to analyze the economic potential of inorganic solid waste. The number of solid waste sample was determined by SNI-19-3964-1994 method and carried out using simple random sampling. The results showed that the estimated total household waste generated in Dumai Timur District is 7.772.735,76 kg/year or approximately 0,31 kg/person/day waste generated on average. The three largest waste composition consisted of organic waste, plastic and paper that represents 68,02%; 12,26%; and 8,08 respectively. The economic potential value was estimated up to Rp 871.605.708,42.5.
Ethanol to high-octane hydrocarbons using HZSM-5 as catalyst
Authors: Taco-Vasquez Sebastian , Salinas Miguel , Murillo Herman , Oñate William 
Published: September 2022

AbstractDehydration and oligomerization of ethanol to hydrocarbons was studied using a packed-bed reactor over HZSM-5 (SiO2/Al2O3=280 mol/mol) zeolite as catalyst. Nine experiments were performed at different temperature and weight hourly space velocity (WHSV) conditions. The experiments were conducted in three levels for both variables (T: 300, 350, and 410 °C) and (WHSV: 1.3, 3.7, and 7.9 h–1). For all the experiments, ethanol was dehydrated to ethylene; however, oligomerization only occurred at WHSV=1.3 h-1, where the yields to liquid hydrocarbons were 15, 25, and 10% at 300, 350, and 410 °C, respectively. The liquid hydrocarbon products were analyzed by copper metal corrosion, gum content, octane number, Reid vapor pressure, gas chromatography, and fractional distillation. The octane number was about 95 in all cases, higher than Ecuador premium gasoline octane number (92). These laboratory-scale findings provide good insights on the ethanol-to-gasoline approach that could be scaled up to the industry.
Heat transfer optimization in a horizontal helical-shaped ground heat exchanger through response surface methodology
Authors: Malacas J D , Certeza L V R , Alfonso B A , Clerigo M H , Tiangco G A , Valencia C P 
Published: September 2022

Abstract
Various combinations of objective functions and design variables have been considered in several optimization studies of ground heat exchangers (GHEs). In this study, the optimum values of the coil pitch and coil diameter of a helical-shaped GHE were determined to maximize its convection heat transfer rate. Central composite design was used to determine the coil pitch and coil diameter dimensions to be used in GHE modeling. Nine models were generated in Fusion360 which were then exported to ANSYS Fluent for CFD simulation. Then, a second-order model of the convective heat transfer rate per unit length as a function of the coil pitch and coil diameter was generated using the response surface methodology. For the design space considered (coil pitch: 600 to 1200 mm; coil diameter: 600 to 1200mm), the highest heat transfer rate was achieved at a coil diameter of 600mm and at a coil pitch of 1200mm. Furthermore, this study showed that if both the coil pitch and coil diameter are considered simultaneously in the optimization of the heat transfer rate of a helical-shaped GHE, then coil pitch would have a directly proportional relationship with the heat transfer rate, while coil diameter would have an inversely proportional relationship.
Strengthening the biogas sector of Ethiopia through international collaboration: the case of the Digital Global Biogas Cooperation (DiBiCoo)
Authors: Bogale Wondwossen , Misikir Maya F. , Sewnet Bruck , van Laere Ann-Kathrin , Sagala Saut , Ma Chuan , Hilbert Jorge Antonio , Mohammed Mutala , Salie Yaseen 
Published: September 2022

Abstract
Even though biogas technology was introduced in Ethiopia in 1957, the technology is still in its infancy stage with more than 98 % of biogas plants installed in Ethiopia at a small- scale level and used for cooking and lighting applications. The Digital Global Biogas Cooperation (DiBiCoo) project facilitates collaboration between European biogas industries and stakeholders from emerging and developing markets through the development and application of innovative digital and non-digital support tools, knowledge transfer and capacity building. The Digital Global Biogas Cooperation helped the Ethiopian biogas sector through capacity building trainings, creating a digital biogas and gasification matchmaking platform to link companies with local biogas actors in the country, and assisting demo case projects up to prefeasibility study stage. Furthermore, it provided practical exposure through virtual and in person biogas plant tour in several countries, and generating several documents related to the Ethiopian biogas sector including an assessment on biogas potential, financial options and a legal frame work to assist the sector. Based on this collaboration, more than 30 stakeholders participated in 11 web seminars, 2 capacity-building trainings, 3 days business model development training in Biogas and more than 10 virtual study tours. One demo case and three- follower cases prefeasibility studies were supported. Thus, the Digital Global Biogas Cooperation is providing much needed support to the biogas sector of Ethiopia.
Lateral gap analysis for Heterogeneous traffic
Authors: Siddharth Chogule  , Kanimozhee S , Madhu K A 
Published: September 2022

Abstract
Indian traffic mainly composes of heterogeneous traffic with minimum or no lane discipline, due to this there are various vehicular interactions in the traffic stream. Lateral gap is the lateral distance between two vehicles flowing in the traffic stream. In this paper an attempt is made to analyse the safe gap maintained by the various category of vehicles with respect to their traffic characteristics and how the road width is affected by area occupancy. Methodology for collection of microscopic data is elaborated. Variation in lateral gap is observed due to the speed of adjacent moving vehicles, road width, and composition of vehicle. The relation between flow and area occupancy determines the utilisation of road width on the selected stretch.
Application of BIM for Effective Construction Safety Management in High Rise Buildings
Authors: Swaroop Devaiah K. L. , Keshav Vasanth 
Published: September 2022

Abstract
The construction industry has a higher occupational casualty rate than other industries. As a proactive approach to safety management, a good safety management system (SMS) can go a long way to help prevent accidents and occupational hazards. This work proposes the use of BIM 3D with the help of Autodesk Revit for the identification of hazards and risks at the designing stages and for implication and planning of effective safety measures. This is carried out from the inception of the project itself which later can be applied to the construction process based on efficient SMS. The SMS established is based on surveys conducted on 45 personnel in the construction industry. The top 5 important issues found to be associated with site safety were: Exposed Rebars; Laboures and Visitors without ID; CCTV monitoring of site; Signs not secured properly; Access to Fire Engine and personnel in case of fire break out.
Experimental Investigation on Mechanical Behavior of AAC Block Masonry
Authors: Raj Pruthvi , Ravula Mehar Babu 
Published: September 2022

Abstract
Autoclaved Aerated Concrete (AAC) flyash Blocks are light weight bricks, which is rapidly used in high rise buildings. The AAC Blocks are one of the sustainable materials manufactured using industrial waste flyash. The masonry infills made with AAC blocks contribute to light weight of structure, thermal conductivity and faster construction. The AAC block masonry needs to be studied at material level to improve its efficiency. The material level understanding of the behavior of AAC block masonry is lacking in the literatures. In this paper, Experimental investigation is presented to understand the compressive stress-strain behavior of AAC Block masonry and its constituents. The response of AAC block masonry with weak and strong mortar is obtained from compression test.
An Experimental Investigation on Characteristic Properties of Hybrid Fibrous Ferro Cement
Authors: Chandrashekar A R , Praveen Kannam 
Published: September 2022

Abstract
Ferro-Cement is a notably new material such as cord meshes and cement mortar. This fabric turned into developed via P L Nervi, an Italian architect and engineer, in1940. He revived the idea of Ferro-Cement and used it for building fishing boats. Ferro-Cement is skinny and light weight cement composite, with numerous specific houses. The inclusion of fibers to the concrete can amplify the energy homes of the blended and transfigure the frangible cement blended into more consistent and malleable fabric known as FRC. Yet the both substances consists few draw backs. Both the substances unable to be waged where unreasonable tremble, unreasonable bending intensity and excessive effect are to be endured. Accordingly the answer lies within the new compound known as fibrous Ferro-Cement, that's the mixture of fibber bolstered concrete and fibrocement. This new composite has some stepped forward mechanical homes, inclusive of sturdiness, impact resistance and so on. Addition of a couple of kind of fibers to the composite improves the energy houses to even greater quantity. However the inclusion of multiple kind of fiber in to the fibrous Ferro-Cement steers to hybrid fibrous Ferro-Cement, which is having more power, homes than the mono fibrous Ferro-Cement.
Superior dielectric properties of epoxy-based photoresist thin film nanocomposites with carbon-coated Cu@C nanoparticles
Authors: Lapeyronie C , Alfonso M S , Viala B , Tortai J-H 
Published: September 2022

Abstract
The microelectronics community has shown great interest for high-k percolative nanodielectric materials for their applications as integrated capacitors. This work highlights the manufacturing process of high-quality Metal Polymer Nanocomposites (MPCs) thin dielectric films with Cu@C nanoparticles into SU8™ negative photolithographic resist. Four capacitor formulations from 0.8%vol up to 3.0%vol of Cu@C functionalized with an insulating layer of Polystyrene Pyrene-terminated (PyrPS) were produced. These films, with a targeted thickness of 15 μm, were spin-coated onto p-doped silicon wafers. Raman spectroscopy demonstrated the nature of the carbon shell of the nanoparticles and its effectiveness in protecting the core from oxidation, while SEM-EDS highlighted the uniformity of the nanoparticle distribution in the resist. Broadband dielectric spectroscopy measured an enhancement of

ε

r

to 124 with reasonable losses of 0.65 at 5 kHz for the (Cu@C)-PyrPS//SU8 3.0%vol nanocomposite. Through the use of Percolation Theory (PT) it was estimated the percolation threshold

φ

C

in the vicinity of 3.2%vol. Furthermore, no electrical aging or dielectric breakdown was detected at low voltage. All the results show the potential use of Cu@C nanoparticles to achieve a high-quality high-k MPC photoresists for the implementation as integrated capacitors.
Medication adverse events in the ambulatory setting: A mixed-methods analysis
Authors: Wong Joanne , Lee Shin-Yu , Sarkar Urmimala , Sharma Anjana E 
Published: September 2022

AbstractPurposeTo characterize ambulatory care adverse drug events reported to the Collaborative Healthcare Patient Safety Organization (CHPSO), a network of 400 hospitals across the United States, and identify addressable contributing factors.MethodsWe abstracted deidentified ambulatory care CHPSO reports compiled from May 2012 to October 2018 that included medication-related adverse events to identify implicated medications and contributing factors. We dual-coded 20% of the sample. We quantitatively calculated co-occurring frequent item sets of contributing factors and then applied a qualitative thematic analysis of co-occurring sets of contributing factors for each drug class using an inductive analytic approach to develop formal themes.ResultsOf 1,244 events in the sample, 208 were medication related. The most commonly implicated medication classes were anticoagulants (n = 97, or 46% of events), antibiotics (n = 24, 11%), hypoglycemics (n = 19, 9%), and opioids (n = 17, 8%). For anticoagulants, timely follow-up on supratherapeutic international normalized ratio (INR) values occurred before the development of symptoms. Incident reports citing antibiotics often described prescribing errors and failure to review clinical contraindications. Reports citing hypoglycemic drugs described low blood sugar events due to a lack of patient education or communication. Reports citing opioids described drug-drug interactions, commonly involving benzodiazepines.ConclusionAmbulatory care prescribing clinicians and community pharmacists have the potential to mitigate harm related to anticoagulants, antibiotics, hypoglycemics, and opioids. Recommendations include increased follow-up for subtherapeutic INRs, improved medical record integration and chart review for antibiotic prescriptions, enhanced patient education regarding hypoglycemics, and alerts to dissuade coprescription of opioids and benzodiazepines.
Intact finger representation within primary sensorimotor cortex of musician’s dystonia
Authors: Sadnicka Anna , Wiestler Tobias , Butler Katherine , Altenmüller Eckart , Edwards Mark J , Ejaz Naveed , Diedrichsen Jörn 
Published: September 2022

Abstract
Musician’s dystonia presents with a persistent deterioration of motor control during musical performance. A predominant hypothesis has been that this is underpinned by maladaptive neural changes to the somatotopic organization of finger representations within primary somatosensory cortex. Here, we tested this hypothesis by investigating the finger-specific activity patterns in the primary somatosensory and motor cortex using functional MRI and multivariate pattern analysis in nine musicians with dystonia and nine healthy musicians. A purpose-built keyboard device allowed characterization of activity patterns elicited during passive extension and active finger presses of individual fingers. We analysed the data using both traditional spatial analysis and state-of-the art multivariate analyses. Our analysis reveals that digit representations in musicians were poorly captured by spatial analyses. An optimized spatial metric found clear somatotopy but no difference in the spatial geometry between fingers with dystonia. Representational similarity analysis was confirmed as a more reliable technique than all spatial metrics evaluated. Significantly, the dissimilarity architecture was equivalent for musicians with and without dystonia. No expansion or spatial shift of digit representation maps were found in the symptomatic group. Our results therefore indicate that the neural representation of generic finger maps in primary sensorimotor cortex is intact in musician’s dystonia. These results speak against the idea that task-specific dystonia is associated with a distorted hand somatotopy and lend weight to an alternative hypothesis that task-specific dystonia is due to a higher-order disruption of skill encoding. Such a formulation can better explain the task-specific deficit and offers alternative inroads for therapeutic interventions.