bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of thiourea concentration during deposition of a CdS buffer layer on the electric properties of Cu2SnS3 solar cells
Authors: Kanai Ayaka , Saito Soichiro , Araki Hideaki , Tanaka Kunihiko 
Published: October 2023

Abstract
The p–n interface state and depletion layer region of solar cells were investigated using electrochemical impedance spectroscopy (EIS) measurements to elucidate the effect of varying thiourea (TU) concentrations in chemical bath deposition (CBD) on the photovoltaic properties of Cu2SnS3 (CTS) solar cells. The photoconversion efficiency (PCE) increased as the TU concentration increased, peaking at 0.16 M and decreasing thereafter. Additionally, the constant phase element-p value, which is indicative of the p–n interface state in CTS solar cells, exhibited a similar trend to that of the PCE of CTS solar cells with increasing TU concentration. The decrease in the PCE was due to the electron recombination that occurred at the p–n interface of CTS solar cells with increasing TU concentrations. Therefore, to improve the PCE of the CTS solar cells, the TU concentration in CBD must be optimized because the p–n interface state is sensitive to changes in the growth conditions of CdS films. By studying the effects on the p–n interface state and depletion layer in CTS solar cells using EIS measurements, useful knowledge can be obtained to increase the PCE of all-sulfide-compound solar cells using n-type CdS films as well as CTS.
A novel collaborative bearing fault diagnosis method based on multi-scale dynamic fusion network under speed fluctuating condition
Authors: Xing Shuo , Wang Jinrui , Han Baokun , Zhang Zongzhen , Bao Huaiqian , Ma Hao , Jiang Xingwang 
Published: October 2023

Abstract
Improving bearing fault diagnosis accuracy under speed fluctuation is a challenge in engineering applications. With the development of big data processing technology, a new solution, multi-sensor complementary information, has emerged. However, single-scale dimension compression, which is adopted in most multi-sensor data fusion methods, captures only a small amount of valuable information. To deal with this deficiency, a multi-scale dynamic fusion network (MSDFN) is proposed. First, considering the existence of non-stationary features in the fluctuating speed signal, the FReLU function is adopted to activate the features after considering contextual information. Then, multi-sensor features are fused by multiple scales to obtain richer feature information, and fusion features at different scales are weighted by using the attention mechanism. Finally, batch normalization is employed to standardize the variable speed feature distribution. The validity of the MSDFN is proved by conducting fault diagnosis experiments on two bearings under speed fluctuating conditions. Experimental results indicate that the MSDFN is not only effective in identifying various types of fault samples, but also shows higher stability in multiple trials when compared with other methods.
A single ended, single port configuration based 9 T SRAM cell for stability enhancement
Authors: Singhal Vansh , Rawat Bhawna , Mittal Poornima , Kumar Brijesh 
Published: October 2023

Abstract
The growing demand for power efficient devices and high-density memories has pushed researchers to develop low power SRAMs. The main objective for these researches is to reduce power consumption and enhances battery life and scaling of technology node. Consequently, in this paper a 9T SRAM bit cell with enhanced stability and single ended, single port configuration is proposed. The cell is designed and simulated at 180 nm technology node with a voltage supply of 1V. The cell proposed has low power consumption owing to single bitline, higher read stability due to isolated read port, better write margin due to disconnected feedback connection and resistant to soft errors because of half select disturbance free architecture. To assess the performance of the proposed cell its performance is compared against existing 6T, 8T, 9TST, SB 9T, TRD 9T, and NTV 9T bit cells. The HSNM (RSNM) and WM values for the proposed cell are equal to 364 mV and 378 mV respectively. The cell is designed to be half select disturbance free and supports bit interleaving. The reliability of the proposed cell is further analysed for local, global and temperature variation. While, the area footprint for the cell is 24.91 μm2.
Optical and γ-ray absorption characteristics of Yb2O3-doped borate based glasses: a step towards understanding the substitution of B2O3/Yb2O3 in the lead borate glass system
Authors: Mahmoud K G , Sayyed M I , Abouhaswa A S 
Published: October 2023

Abstract
The results of this study will help in the development of a novel glass composition containing Yb2O3 concentrations. The impacts of substitution of B2O3/Yb2O3 on the physical, optical, and radiation shielding properties for the B2O3-PbF2-CaO-Li2O glass system were investigated. The glass system was fabricated under melting and annealing temperatures of 1050 °C and 400 °C using the melting quenching method. The density of the fabricated samples ranged between 4.33 g cm−3 to 4.60 g cm−3 with enrichment of the Yb3+ content between 0–8.21 wt%, respectively. Moreover, the enrichment of the Yb3+ ions shows an enhancement in the optical properties of the fabricated glasses where the direct energy band gap enhanced between 4.192 and 4.188 eV and the Urbach energy raised from 0.52 to 0.59 eV with raising the Yb3+ concentrations. The Yb3+ incrementation shows an enhancement in the γ- ray shielding properties where the linear attenuation coefficient was raised by factors of 15%, 6%, and 5% at γ-ray energies of 0.015 MeV, 0.662 MeV, and 1.173 MeV, respectively. Due to the tiny Yb3+ concentration added to the fabricated glass system, the results showed a small increase in the linear attenuation coefficient values in the low γ-ray energy but no significant enhancement in the intermediate and high-ray energies.
Non-local tails in radiation in odd dimensions
Authors: Khlopunov M. 
Published: October 2023

Abstract
Huygens principle violation in a spacetime of odd dimensions leads to the fact that the retarded massless fields of localised sources depend on their history of motion preceding the retarded time. This non-local character of retarded fields should result into the formation of tail signals in the radiation of localised sources. In particular, in gravity theories with odd number of extra spacetime dimensions the gravitational radiation of binary systems should contain the tail terms. In this work, we demonstrate the presence of tail signal in radiation within a simple model of scalar field interacting with the point charge moving on elliptical orbit in three dimensions. We find that the tail term results into the characteristic dependence of radiation power of the charge on time. In particular, its extremum points do not correspond to the moments when the charge passes the pericenter and apocenter of the orbit, in contrast with the four-dimensional theory. We obtain the formulae for the shifts of radiation power extremum points up to the contributions quadratic in the orbital eccentricity. We also compute the spectral distribution of radiation power of the charge. We find that in three dimensions the charge on elliptical orbit radiates into the lower harmonics of the spectrum, compared to the four-dimensional theory. We conjecture that in higher dimensions the character of spectral distributions is opposite — the charge mainly radiates into the higher harmonics of the spectrum.
Decaying Dark Matter and Lyman-α forest constraints
Authors: Fuß Lea , Garny Mathias 
Published: October 2023

Abstract
Decaying Cold Dark Matter (DCDM) is a model that is currently under investigation
regarding primarily the S
8 tension between cosmic microwave background (CMB) and certain
large-scale structure measurements. The decay into one massive and one (or more) massless daughter
particle(s) leads to a suppression of the power spectrum in the late universe that depends on the
relative mass splitting ϵ = (1 - m
2/M
2)/2 between the mother and massive daughter particle
as well as the lifetime τ. In this work we investigate the impact of the BOSS DR14
one-dimensional Lyman-α forest flux power spectrum on the DCDM model using a conservative
effective model approach to account for astrophysical uncertainties. Since the suppression of the
power spectrum due to decay builds up at low redshift, we find that regions in parameter space
that address the S
8 tension can be well compatible with the Lyman-α
forest. Nevertheless, for values of the degeneracy parameter ϵ ∼ 0.1-0.5%, for which
the power suppression occurs within the scales probed by BOSS Lyman-α data, we find
improved constraints compared to previous CMB and galaxy clustering analyses, obtaining
τ ≳ 18 Gyrs for small mass splitting. Furthermore, our analysis of the BOSS
Lyman-α flux power spectrum allows for values τ ∼ 102 Gyrs, ϵ ∼ 1%,
that have been found to be preferred by a combination of Planck and galaxy clustering data with a
KiDS prior on S
8, and we even find a hint for a marginal preference within this regime.
Crosstalk characteristics of orbital angular momentum of focused perfect vortex beam in atmospheric turbulence
Authors: Wei H , Du Q , Shi C , Xue X , Cai D 
Published: October 2023

Abstract
The perfect optical vortex beam (POV) is a special kind of vortex beam, whose radius is independent of its orbital angular momentum (OAM) mode, but the atmospheric turbulence (AT) causes crosstalk between different topological charges, which is a serious challenge in OAM-based communication system. We establish a theoretical model with a turbulence suppression effect for deriving the spiral spectrum of a focused perfect optical vortex beam (FPOV) after propagation through anisotropic AT. Through numerical analysis, we simulate the behavior of FPOV under different turbulence and beam parameters to better understand the effect of the received probability and its corresponding modal crosstalk under various conditions. In addition, the simulation of AT uses the multi-phase screen method to verify the theoretical results. The results show that the changes in topological charge, wavelength, receiving aperture, beam waist, and hollow radius all have an influence on the received probability. Also, some strategies for selecting turbulence parameters to reduce modal crosstalk in anisotropic AT are also discussed. The focus would reduce the effect of turbulent aberrations on the signal OAM mode received probability, and the FPOV provided better performance than the POV, which may be useful in OAM-based free space optical communication.
A new Machine Learning-based method for identification of time-correlated events at tagged photon facilities
Authors: Sokhoyan V. , Mornacchi E. 
Published: October 2023

Abstract
We present a new Machine Learning-based multivariate
analysis method for the selection of time-correlated hits in the
tagging system and devices used to detect particles in the final
state at the bremsstrahlung-based tagged photon facilities. This
method can be applied instead of the widely used sampling and
subtraction of the time-uncorrelated background, in particular at
experiments aiming for high precision, where the subtraction of the
time-uncorrelated background leads to increased
uncertainties. Moreover, the identification of events with Machine
Learning algorithms allows to preserve the information about
correlations of kinematic variables in the final state, which can be
advantageous for further phenomenological analyses of the
experimental results.
Numerical comparative study on seismic response of half-span and full-span scaled models of a floating type cable-stayed bridge
Authors: Yadi S , Suhendro B , Priyosulistyo H , Aminullah A 
Published: October 2023

Abstract
This study compares the results of numerical simulations of half-span and full-span cable-stayed bridge models based on the seismic response of the pylons and main girders subjected to earthquake loads. The half-span model represents the most critical condition of the bridge during the construction phase, while the full-span model represents the bridge in operational phase. The three-dimensional finite-element modeling of the two bridge models uses data from the longest existing cable-stayed bridge in Indonesia which was scaled down geometrically to 1/160, using Midas CIVIL software. The Kobe earthquake record from the PEER Strong Motion Database was used in this study by applying the spectral matching method to modify its acceleration according to the location of the existing bridge being analyzed. This study also examines the influence of the directional effects of earthquake load relative to the longitudinal axis of the bridge, namely 0, 45, and 90 degrees. The results of the analysis show that for the half-span bridge model, the maximum acceleration occurs at the top of the pylon due to earthquake excitation at 90 degrees direction, with an amplification factor of 4.658, while the amplification factor in full-span bridge conditions is only 2.44. In addition, in both the half-span and full-span bridge models, the largest acceleration amplification factor occurs in the main girder that is caused by earthquake excitation at 90 degrees direction. The largest transverse displacement occurs at the free ends of the main girder, but not in the full-span model. The results of the study indicate that during the detailed design process the designer has to consider the effect of earthquake on the strength and stability of the bridge during construction especially if the balanced cantilever method applies.
Evaluation of Liquefaction Potential Index in the Educational Infrastructure Reconstruction Project at the University of Tadulako, Palu City, Central Sulawesi
Authors: Pasin H R , Ismanti S 
Published: October 2023

Abstract
On September 28, 2018, The Palu-Koro fault triggered an earthquake of Mw
7.5. at a depth of 20 km and 72 km northeast of Palu City. As a result, the University of Tadulako suffered significant damage post this earthquake. The Ministry of Public Works and Housing was assigned to reconstruct this location, which was located near the epicentre, and there are alluvium deposits of the Holocene age with loose sand soil and shallow groundwater levels on-site. Based on the Indonesian Seismic Code SNI 1726:2019, it is necessary to propose liquefaction potential and mitigation for building planning. The study aims to calculate the Safety Factor (S.F.) against liquefaction using a simplified procedure by Seed-Idriss and developed methods by Idriss-Boulanger. The S.F. was used as an input to determine the Liquefaction Potential Index (LPI) by Iwasaki et al. The study showed different categories of LPI values. The highest LPI value was found at BH-05, with a very high liquefaction potential. The soil depths susceptible to liquefaction are up to 9 meters. Application of deep foundation penetrating liquefiable soil layer is recommended as the mitigation. It is necessary to conduct further studies on the deep foundation analysis to be applied to this location.
The Stability of Sidoarjo Mud Volcano Embankment Induced By The Excess Pore Water And Mud Pressure Based On Numerical Simulation
Authors: Ruus K , Rifa’i A , Adi A D 
Published: October 2023

Abstract
Sidoarjo mud volcano is a geology phenomenon which is the worst in terms of disaster to the people and environment. This is partly due to the overpressure at depth and as well as the cracks and fracture existence. Furthermore, the overpressurization impacts the increasing of pore water pressure and causing the reduction of effective stress. The complexity of the subsurface’s physical condition causes the instability of the embankment. This paper presents the evaluation of the stability of the embankment under the ideal and the presence of subsurface pressure conditions. The numerical simulation using Plaxis 2D has been conducted to determine the change of pore water pressure due to subsurface pressure and the safety factor of an embankment. The results show the subsurface pressure impact the increasing of pore water pressure around 208 kPa consequently. It reduces the safety factor around 4-30% from the ideal condition. The safety factor of embankment in the existing condition is still less than the minimum requirement which is 1,5 in both modeling conditions. The embankment collapse was caused by the landslide that leads upstream of the embankment as the effect of the tendency of upstream side landslides that is greater than the downstream side.
Ground Motion and Liquefaction Study at Opak River Estuary Bantul
Authors: Zakariya A , Rifa’i A , Ismanti S 
Published: October 2023

Abstract
In Mei 2006, an earthquake occurred, and liquefaction was induced in Bantul Regency in the form of lateral spreading and sand boiling. Based on Indonesia’s liquefaction susceptibility zone map 2019, the Bantul coast was identified as a high liquefaction hazard zone. There is a high risk of liquefaction in that location, and if liquefaction occurs, the effective stresses of the soil will be lost. This study aimed to determine ground motion-induced liquefaction potential in Opak river estuary in Bantul. The peak ground acceleration can be predicted by probabilistic seismic hazard analysis (PSHA) based on Indonesian spectra design application, deterministic seismic hazard analysis (DSHA) based on the mechanism of a recent earthquake in Bantul, and non-linear earthquake site response analysis (NERA) based on the 2004 Parkfield California earthquake, the 1986 Chalfant Valley California earthquake, and the 1987 Superstition Hill California earthquake. The value of acceleration from site-specific responses with DSHA and NERA is 0.558 g. Then, the maximum acceleration, seismic magnitude, N-SPT bore log soil, and other soil parameters are analyzed with a semi-empirical simplified method to estimate the safety factor of liquefaction potential using Settle3. The liquefaction safety factor was calculated by dividing the cyclic resistance ratio by the cyclic stress ratio; liquefaction occurs if the safety factor is less than 1. The result indicates that the Opak river estuary has a liquefaction potential beneath the surface from -1.5 to -16.5 m depth with various thick each boreholes. It implies that the bearing capacity design of the foundation system in this area and the liquefaction effect that will emerge when an earthquake occurs must be appropriately considered.
Response Spectrum Design Based on Site Class and Site-Specific Analysis in the Transition Zone
Authors: Dwiyantoro W , Fathani T F , Adi A D 
Published: October 2023

Abstract
The building structure design needs to pay attention to the seismic code and all its consequences. Building A which will be built in Sleman, Special Region of Yogyakarta is 12.20 km from the Opak Fault causing the Bantul Earthquake of Mw 6.3 in 2006, needs seismic analysis properly using SNI 1726:2019. Based on the site near fault criteria on seismic code, Building A does not belong to the site near fault category, so it used the Probabilistic Seismic Hazard Analysis method. However, considering its distance and magnitude, the value is in the range of the requirements limit. Hence, it is still relevant when compared to the Deterministic Seismic Hazard Analysis method for designing the response spectrum. Based on the site classification in the seismic code, a site that is vulnerable to liquefaction belongs to the site class F and therefore requires site-specific analysis. The site-specific surface response spectrum is taken from the equivalent-linear and non-linear site response analysis using Deepsoil v7.0 software. The response spectrum is also calculated based on site class according to the shear wave velocity (v
s) and N-SPT criteria. The site-specific spectral acceleration results are compared to 80% of the site class E spectral acceleration, as required. The site belongs to site class D using v
s criteria and belongs to site class E using the N-SPT criteria. Only the equivalent-linear site response spectrum in the modified maximum horizontal direction spectrum is eligible when compared to requirements. Most of the non-linear site response spectrum results or the geometric mean response spectrum of the equivalent-linear site response results can satisfy the requirements compared to 80% of the site class D spectral acceleration because the site response analysis uses the v
s parameter. The non-linear site response spectral acceleration is smaller than the equivalent-linear site response spectral acceleration.
Design analysis of a multi-port 8-shaped inductor for RF applications
Authors: Somraj Keerthi , Kumar P Akhendra 
Published: October 2023

Abstract
Portable wireless devices with a high-frequency range should also function with low voltage, providing low power dissipation and noise. Design engineers cannot successfully meet the above design objectives without using RF inductors. Since integrated inductors are an essential part of RF circuits, these devices are highlighted because of their enormous size in the circuit layout and unsettling radiations. As a result, there is a solid motivation to design, optimize, and model inductors made on Si substrates. This article presents the design of a multi-path multi-port 8-shaped inductor with dimensions of 150 × 150 μm, simulated using Cadence EMX simulator to analyze its Q-factor and inductance. The analysis provided that the simulated inductance has the highest value of 12.2 nH, which is the maximum value across all the conclusions of this research. Another significant discovery was that this Inductor is suitable for up to 45 GHz. To achieve an improved frequency of operation for the multi-path, multi-port 8-shaped Inductor, an analysis of the Inductor’s topology is conducted, focusing on enhancing the loop widths of metal layers and optimizing spacing between the metal tracks.
High-dimensional multi-fidelity Bayesian optimization for quantum control
Authors: Lazin Marjuka F , Shelton Christian R , Sandhofer Simon N , Wong Bryan M 
Published: October 2023

Abstract
We present the first multi-fidelity Bayesian optimization (BO) approach for solving inverse problems in the quantum control of prototypical quantum systems. Our approach automatically constructs time-dependent control fields that enable transitions between initial and desired final quantum states. Most importantly, our BO approach gives impressive performance in constructing time-dependent control fields, even for cases that are difficult to converge with existing gradient-based approaches. We provide detailed descriptions of our machine learning methods as well as performance metrics for a variety of machine learning algorithms. Taken together, our results demonstrate that BO is a promising approach to efficiently and autonomously design control fields in general quantum dynamical systems.