bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structured model selection via
ℓ1−ℓ2
optimization
Authors: Lu Xiaofan , Zhang Linan , He Hongjin 
Published: November 2023

Abstract
Automated model selection is an important application in science and engineering. In this work, we develop a learning approach for identifying structured dynamical systems from undersampled and noisy spatiotemporal data. The learning is performed by a sparse least-squares fitting over a large set of candidate functions via a nonconvex

ℓ
1

−

ℓ
2

sparse optimization solved by the alternating direction method of multipliers. We show that if the set of candidate functions forms a structured random sampling matrix of a bounded orthogonal system, the recovery is stable and the error is bounded. The learning approach is validated on synthetic data generated by the viscous Burgers’ equation and two reaction–diffusion equations. The computational results demonstrate the theoretical guarantees of success and the efficiency with respect to the number of candidate functions.
Experimental observation of the vertical displacement between heating and levitation regions in an electromagnetic levitation coil
Authors: Sniķeris Jānis , Apsītis Aigars , Pumpurs Austris , Lācis Uģis , Kravchenko Sergey , Silamiķelis Viesturs 
Published: November 2023

Abstract
Scientific progress in the relevant fields of science and technology requires the production of crystals with quality beyond the current state of the art. Electro-magnetic levitation (EML) is a prospective method for the growth of high-purity crystals, allowing for avoidance of any contact between the crystal-melt and the crucible. Contactless crystal growth reduces the number of crystal defects commonly abundant in conventional crystal growth methods. The EML method also allows crystal growth of materials with very high melting points. In this article, we report detailed measurements of the EML method. The induction coil used in this study has three turns and one counterturn. We subject different metal material (Al, Cu, Sn, and Ni) samples to the induction coil’s electromagnetic field. For each sample, we measure the induced lift force, Joule heating, and components of magnetic induction as a function of position inside the coil. The results show that the maximum heating in an EML coil is emitted in the area below the levitation zone, a discrepancy not reported earlier. Our findings suggest that this shift should be considered in coil design to avoid instability of the levitated material. We hope this study will serve as a stepping stone for developing EML techniques. The experimental results we provide will be used to evaluate the accuracy of current and future theoretical models of EML coils. This, in turn, will facilitate progress in the application of EML to the growth of larger crystals of higher quality.
Ultra-broadband high-efficiency cross-polarization conversion and amplitude-phase manipulable multi-functional wavefront manipulation based on terahertz metasurface
Authors: Cai Chengxin , Li Yinfei , He Guangchen , Meng Hongmei , Li Mingxing , Qin Yao , Wang Qifu 
Published: November 2023

Abstract
Drawing upon the physical phenomenon of polarization transformation, this paper proposes an ultra-broadband, high-efficiency linear polarization converter composed of a metallic grating, an L-shaped metallic patch, and a dielectric substrate. The polarization conversion properties have been scrutinized using the finite element numerical simulation software CST. The computational outcomes reveal that the polarization converter operates within the frequency range of 0.5 THz to 1.8 THz, exhibiting a relative bandwidth of 113%, a transmission coefficient exceeding 0.87, a polarization conversion efficiency approaching 100%, and a phase coverage spanning 360°. Furthermore, a Fabry–Perot interference model was established utilizing Matlab to corroborate the concurrence between the theoretical analysis and the numerical findings. The polarization converter metasurface amalgamates both phase and transmission amplitude variations to accomplish not only a two-dimensional focusing lens operating between 1.55 THz and 1.65 THz, but also a spatial imaging capability utilizing transmission amplitude variation within the 0.5 THz to 1.15 THz range. The outcomes demonstrate that the devised metasurface exhibits ultra-broadband and high transmission efficacy, thus providing novel insights for the versatility of terahertz wave polarization and phase manipulation.
Polarization-insensitive graphene-based THz rasorber with ATA characteristics
Authors: Ali Mohd Farman , Bhattacharya Rajarshi 
Published: November 2023

Abstract
This paper presents a polarization-insensitive rasorber implemented with absorption-transmission-absorption (ATA) characteristics over three consecutive frequency ranges in the terahertz (THz) band. The proposed rasorber is made of a two-layer periodic structure. These two layers are separated by a spacer made of glass substrate. The unit cells of the top layer have a modified swastika geometry metallization, which is loaded with graphene strips to make it lossy and provide dual-band absorption. In the bottom plane frequency selective surface (FSS), a square ring is engraved on the metal layer to obtain bandpass characteristics between two stopbands provided by the top layer. The designed rasorber works in the

0.2
–
1.2

THz frequency range. It provides wideband absorption with a

S

11

<
−
10

dB

from

0.274

to

1.094

THz with a fractional bandwidth (BW) of around

118
%
.

An in-band transmission window is designed with a

S

21

>
−
3

dB

in the frequency of

0.615

to

0.719

THz provides a large BW of

104

GHz (

15.59
%

) for THz communication. Within this transmission band, the lowest insertion loss of

0.27

dB

is obtained at 0.686 THz. It provides the absorption of more than

80
%

in both the lower band (

0.276
–
0.442

THz,

46.24
%

BW) and the higher band (

0.861
–
1.094

THz,

23.83
%

BW). The simulated response of the designed rasorber using a full-wave electromagnetic simulator and calculated through ECM are found to be in good agreement.
DFT studies of 2D materials inspired by Lie algebras
Authors: Belhaj Adil , Ennadifi Salah Eddine 
Published: November 2023

Abstract
Inspired by the root systems of Lie algebras of rank 2, we propose a mathematical method to engineer new 2D materials with double periodic structures tessellating the plane. Concretely, we investigate two geometries relaying on squares and hexagons exhibiting the D
4 × D
4 and D
6 × D
6 dihedral group invariances, respectively. Due to lack of empirical verifications of such double configurations, we provide a numerical investigation by help of the open source quantum espresso. Motivated by hybrid structures of the graphene, the silicene, and the germanene, we investigate two models involving the D
4 × D
4 and D
6 × D
6 dihedral symmetries which we refer to as Si4Ge4 and Si6C6 compounds, respectively. For simplicities, we study only the opto-electronic physical properties by applying an electromagnetic source propagating in linear and isotropic mediums. Among others, we find that such 2D materials exhibit metallic behaviors with certain optical features. Precisely, we compute and discuss the relavant optical quantities including the dielectric function, the absorption spectra, the refractive index, and the reflectivity. We believe that the Lie algebra inspiration of such 2D material studies, via density functional theory techniques, could open new roads to think about higher dimensional cases.
A new 3D fractional-order chaotic system with complex dynamics
Authors: Wang Jiahui , Dong Chengwei 
Published: November 2023

Abstract
Compared to integer-order chaotic systems, fractional-order chaotic systems have more complex dynamical features due to the introduction of order. The application of fractional-order chaotic systems to chaotic cryptosystems makes the cryptosystems with higher security properties. In this paper, we developed a new 3D fractional-order chaotic system from a 3D integer-order chaotic system, and investigate the dynamical behaviors of this fractional-order system with different parameters and orders. Moreover, self-excited attractors appeared at lower orders through circuit simulations. Furthermore, the synchronization of the new fractional-order chaotic system in the presence of systematic uncertainties and perturbations was achieved using the sliding mode control technique, which sets the stage for the implementation of communication. Finally, offset boosting control was used to investigate the utility of the new chaotic system in engineering applications.
Old rocks, new limits: excavated ancient mica searches for dark matter
Authors: Acevedo Javier F. , Bramante Joseph , Goodman Alan 
Published: November 2023

Abstract
Minerals excavated from the Earth's crust contain gigayear-long astroparticle records, which can be read out using acid etching and microscopy, providing unmatched sensitivity to high mass dark matter. A roughly millimetre size slab of 500 million year old muscovite mica, calibrated and analyzed by Snowden-Ifft et al. in 1990, revealed no signs of dark matter recoils and placed competitive limits on the nuclear interactions for sub-TeV mass dark matter. A different analysis of larger mica slabs in 1986 by Price and Salamon searched for strongly interacting monopoles. After implementing a detailed treatment of Earth's overburden, we utilize these ancient etched mica data to obtain new bounds on high mass dark matter interactions with nuclei.
Constraining extended cosmologies with GW×LSS cross-correlations
Authors: Bosi M. , Bellomo N. , Raccanelli A. 
Published: November 2023

Abstract
The rapid development of gravitational wave astronomy provides the unique opportunity of
exploring the dynamics of the Universe using clustering properties of coalescing binary black hole
mergers. Gravitational wave data, along with information coming from future galaxy surveys, have
the potential of shedding light about many open questions in Cosmology, including those regarding
the nature of dark matter and dark energy. In this work we explore which combination of
gravitational wave and galaxy survey datasets are able to provide the best constraints both on
modified gravity theories and on the nature of the very same binary black hole events. In
particular, by using the public Boltzmann code Multi_CLASS, we compare cosmological
constraints on popular ΛCDM extensions coming from gravitational waves alone and in
conjunction with either deep and localized or wide and shallow galaxy surveys. We show that
constraints on extensions of General Relativity will be at the same level of existing limits from
gravitational waves alone or one order of magnitude better when galaxy surveys are included.
Furthermore, cross-correlating both kind of galaxy survey with gravitational waves datasets will
allow to confidently rule in or out primordial black holes as dark matter candidate in the
majority of the allowed parameter space.
A smoking gun from the power spectrum dipole for elastic interactions in the dark sector
Authors: Beltrán Jiménez Jose , Di Dio Enea , Figueruelo David 
Published: November 2023

Abstract
Models with pure momentum exchange in the dark sector have been shown to provide a promising scenario to tackle the tension in the clustering inferred from high- and low-redshift probes. A distinctive feature of these models is that only the Euler equation for the dark matter component is modified and the correction is such that the net effect can be associated to an additional friction determined by the interaction rate. In this work, we show that the strength of the interaction parameter needed to resolve the σ
8 tension could be detected from the dipole of the matter power spectrum that is expected to be measured by a SKA-like survey.
Network Planning Application for Scheduling of Marine Diesel Engine General Overhaul Activities
Authors: Rachmawati Indah , Dimas Endro W R. , Haryono Edi 
Published: November 2023

Abstract
There are many sub-tasks and tools in general overhaul activities, so that a planned and systematic arrangement are needed. In systematic general overhaul planning can use the Network Planning method. Scheduling by the Network Planning method describes a task into a network. The Network Planning has two commonly used techniques, namely CPM (Critical Method Path) and PERT (Program Evaluation and Review Technique). Therefore, in this study, scheduling will be carried out by the Network Planning method, CPM and PERT techniques. By using network planning in overhaul activities, it is hoped that it will be able to identify deviations and critical paths in the sequence of work processes so as to prevent delays in completing work.
The Effect of Reinforce Powder Size on The Properties of Pineapple Leaf Fiber – Bagasse Sandwich Composites
Authors: Primaningtyas Widya Emilia , Anitasari Galuh , Munir M. Miftachul , Alfanda Benedicta Dian , Wulandari Kiki Dwi 
Published: November 2023

Abstract
The growth of ship production in Indonesia encourages the shipping industry to utilize the composite material in order to be more efficient. Natural fibre-reinforced composite (NFRC) is one option that should be considered for use safer than fiberglass. The usage of fiberglass could trigger several health problems. Sugarcane and pineapples are one of the most common agricultural commodities, yet their waste has not been treated optimally. This research is going to analyse the effect of reinforcement powder size on its bending strength in pineapple leaf fibre – bagasse reinforced sandwich composites. Pineapple leaf fibre use as skin reinforcement whereas bagasse use as core reinforcement. Sandwich composites were reviewed for their bending strength on specimens on reinforcement powder size 40, 60, and 100 mesh. The composite was made using the hand lay-up method with skin composition is 20:80% and core composition is 25:75%, each layer of skin and core have 2 mm thickness. The highest bending strength for sandwich composite is 52,72±0,85 MPa as a result of the experiment using 100 mesh of reinforcement powder. The bending strength of sandwich composite increase as finer particle powder use for the reinforcement. The highest bending strength in this study can be used as bulkhead material for the interior of the ship’s accommodation space based on SNI 01-4449-2006.
Analysis of Workload on Fibre Ship Development Project Using Workload Analysis and NASA-TASK LOAD INDEX Methods
Authors: Nuraismi Paramitha , Hardiyanti Fitri , Rustini Irma 
Published: November 2023

Abstract
One of the fibre shipyards in Surabaya has 16 workers who play a direct role in shipbuilding activities. Every year this shipyard experiences an increase in the number of job requests. The more demand for shipbuilding, the workers involved also have to work harder. The purpose of this study is to find out how the workload is owned by the workforce and determine the optimal number of workers so that it can be used as a reference for decision making in the construction of the next ship. This research will use Workload Analysis and NASA-TLX methods. The results of the analysis using the Workload Analysis method resulted in a recommended workforce of 21 people so that 5 additional workers were needed. While the results of the analysis using the NASA-TLX method, the recommended workforce is 28 people, so there needs to be 12 additional workers. With this addition there is no excessive workload owned by the workforce.
Cyclic behavior and numerical study of PRC coupling beam with steel truss floor slab
Authors: Nie Jianchun , Zhang Zhen , Liu Guangjun , Qiao Yufeng , Zhao Zhe , Li Jie , Jin Bo , Tian Jianbo , Li Bolin , Zhou Wenjing 
Published: November 2023

Abstract
The coupling beam with small span-to-depth ratio is prone to brittle shear failure under the action of earthquake, so it can not play its role as the first line of defense against earthquake. Therefore, this paper proposes a method for calculating the shear bearing capacity of PRC-connected beams with reinforced truss floor plates. A more rational calculation model should be adopted based on its mechanical mechanism. In this study, ABAQUS finite element software is utilized to explore the parameters of PRC-connected beams with steel truss plates, including the span-to-height ratio, reinforcement ratio of the internal steel plate, diameter of upper and lower chord bars, and diameter of abdominal bars. The analysis shows that the span-to-height ratio, steel plate ratio and concrete compressive strength have a significant effect on the seismic behavior of PRC coupling beams with steel truss floor slab. Based on the softened tension-compression bar model combined with the multi-strip model, the theoretical calculation method of the shear capacity of PRC connected beams with steel truss bearing plates is derived. The results of comparison test and simulation verify the accuracy of the calculation results, and provide a design basis for the engineering application of PRC connected beams with steel truss floor plates.
Evaluation of present-day extreme precipitation over the United States: an inter-comparison of convection and dynamic permitting configurations of E3SMv1
Authors: A A Akinsanola , G J Kooperman , W M Hannah , K A Reed , A G Pendergrass , Wei-Ching Hsu 
Published: November 2023

AbstractAccurate simulation of the present-day characteristics of mean and extreme precipitation at regional scales remains a challenge for Earth system models, which is due in part to deficiencies in model physics such as convective parameterization (CP), and coarse resolution. High horizontal resolution (HR, ∼25 km) and multiscale modeling framework (MMF, i.e. replacing conventional CP with embedded km-scale cloud-resolving models) are two promising directions that could help improve the interaction between subgrid-scale physical processes and large-scale climate. Here, we evaluate simulated extreme precipitation over the United States (US) across three configurations (i.e. low-resolution [LR], HR, and MMF) of the Energy Exascale Earth System Model (E3SMv1) and intercompare them against two gridded observation datasets (climate prediction center daily US precipitation and integrated multi-satellite retrievals for global precipitation measurement). We assess the model’s ability to simulate very heavy seasonal precipitation (illustrated by the difference between the 99th and 90th percentile values) as well as the spatial distributions of several extreme precipitation indices defined by the expert team on climate change detection and indices. Our results show that both the dry (i.e. consecutive dry days (CDD)) and wet (i.e. consecutive wet days, maximum 5 day precipitation, and very wet days) extremes evaluated herein show some improvement as well as degradation with MMF and HR relative to LR. These results vary across seasons and US subregions. For instance, only the very heavy precipitation of winter is improved with MMF and HR. Both configurations alleviate the well-known drizzling bias evident in LR across both winter and summer in many parts of the US, largely due to the overall improvement in intensity and frequency of precipitation. Additionally, our results suggest that while E3SMv1-MMF has higher intensity rates when it does rain, it has too many CDD during the summer, contributing to a low mean precipitation bias.
Clinicopathological prognostic stratification for proteinuria and kidney survival in IgA nephropathy: a Japanese prospective cohort study
Authors: Koike Kentaro , Kawamura Tetsuya , Hirano Keita , Nishikawa Masako , Shimizu Akira , Joh Kensuke , Katafuchi Ritsuko , Hashiguchi Akinori , Yano Yuichiro , Matsuzaki Keiichi , Matsushima Masato , Tsuboi Nobuo , Maruyama Shoichi , Narita Ichiei , Yokoo Takashi , Suzuki Yusuke 
Published: November 2023

ABSTRACT

Background
We require a clinicopathological risk stratification method for immunoglobulin A nephropathy (IgAN) to predict kidney outcomes. We examined a renal failure risk group (RF-RG) classification system created following a prior multicentre, retrospective study to determine if RF-RG could predict kidney outcomes.

Methods
We collected data from Japanese patients with IgAN registered between 1 April 2005 and 31 August 2015. The primary outcome was a composite 50% increase in serum creatinine from baseline or dialysis induction. The secondary outcomes were times to proteinuria remission (ProR) and haematuria remission (HemR).

Results
The enrolled 991 patients from 44 facilities were followed for a median of 5.5 years (interquartile range 2.5–7.5), during which 87 composite events (8.8%) occurred. RF-RG was significantly associated with the primary outcome {hazard ratio [HR] II 2.78 [95% confidence interval (CI) 1.12–6.93], III 7.15 (2.90–17.6), IV 33.4 (14.1–79.0), I as a reference, P &lt; .001}.
The discrimination performance was good [C-statistic 0.81 (95% CI 0.76–0.86)] and the time-dependent C-statistics exceeded 0.8 over 10 years. Among the 764 patients with proteinuria and 879 patients with haematuria at baseline, 515 and 645 patients showed ProR and HemR, respectively. ProR was significantly less frequent in patients with advanced disease [subdistribution HR: II 0.79 (95% CI 0.67–0.94), III 0.53 (0.41–0.66), IV 0.15 (0.09–0.23), I as a reference, P &lt; .001]. We also observed an association between HemR and RF-RG.

Conclusions
RF-RG demonstrated good predictive ability for kidney outcomes.
Mid-term outcomes of aortic valve repair using an anatomically shaped internal annuloplasty ring
Authors: Jarral Omar A , Jensen Christopher W , Doberne Julie W , Downey Peter S , Serfas J D , Vekstein Andrew M , Hughes G Chad 
Published: November 2023

Abstract

OBJECTIVES
The Hemispherical Aortic Annuloplasty Reconstructive Technology (HAART) ring is a rigid, internal and geometric device. The objective of this article is to assess the mid-term outcomes of aortic valve repair (AVr) using this prosthesis.

METHODS
A prospectively maintained database was used to obtain outcomes for adult patients undergoing AVr using the HAART ring between September 2017 and June 2023. All aortic patients at our institution undergo life-long surveillance with regular assessment and valve imaging.

RESULTS
Seventy-one patients underwent AVr using the HAART device: 53 had a trileaflet valve and 18 a bicuspid valve. The median age was 54 years, and most were male (79%). Many required concomitant intervention: 46% had a root procedure and 77% an arch repair. There were no in-hospital deaths, and the median postoperative stay was 5 days. At a mean follow-up of 3.9 (±1.1) years, freedom from reoperation was 94%. Late imaging demonstrated: zero trace (25%), 1+ (54%), 2+ (15%) and 4+ (6%) aortic insufficiency (AI). Eleven patients have ≥moderate AI under surveillance, all of whom have a trileaflet valve (21% of trileaflet patients). Four patients required reoperation: 3 for ring dehiscence and 1 for endocarditis.

CONCLUSIONS
Although early results using the HAART device are encouraging, mid-term results raise concern as 21% of trileaflet patients developed recurrent ≥moderate AI by 4 years post-repair. We experienced 3 incidences of ring dehiscence requiring reoperation. Based on this, we recommend caution using the sub-annular approach for stabilization in patients with trileaflet aortic valves. Long-term results are needed to assess outcomes against established techniques.
“A Whirligig of Revolutionary Presidents”: state capacity, political stability, and business in Haiti, 1905–1927
Authors: Palsson Craig 
Published: November 2023

Abstract
Political instability in developing countries can be detrimental to the business environment. I examine how a sudden end to instability affected businesses in Haiti from 1905 to 1927. In 1915, after a tumultuous 4 years that saw seven different men serve as president, US Marines landed in Haiti and ended the conflict. Using new data on foreign-owned businesses operating in Haiti, I show that the number of foreign businesses increased rapidly after the end of instability. I present evidence that the businesses responded to lower uncertainty and increased trust in who held the executive power.