bluuebunny/crossref_metadata_2025_split huggingface dataset:
Quantum loop effects on the power spectrum and constraints on primordial black holes
Authors: Choudhury Sayantan , Panda Sudhakar , Sami M. 
Published: November 2023

Abstract
We present a detailed exposition on the prospects of the formation of Primordial Black Holes (PBHs) during Slow Roll (SR) to Ultra Slow Roll (USR) sharp transitions in the framework of single-field inflation. We use an effective field theory (EFT) approach in order to keep the analysis model-independent and applicable to both the canonical and non-canonical cases. We show in detail how renormalizing the power spectrum to one loop order in P(X,ϕ) theories severely limits the prospects for PBH formation in a single-field inflationary framework. We demonstrate that for the allowed range of effective sound speed, 1 < cs
< 1.17, the consistency of one-loop corrected power spectrum leaves a small window for black hole masses, M
PBH∼𝒪(102–103)gm to have sufficient e-foldings, Δ𝒩Total ∼ 𝒪(54–59) for inflation. We confirm that adding an SR regime after USR before the end of inflation does not significantly alter our conclusions. Our findings for sharp transition strictly rule out the possibility of generating large masses of PBHs from all possible models of single field inflation (canonical and non-canonical).
Our results are at least valid for the situation where constraints from the loop effects are computed using either Late-Time (LT) or Adiabatic-Wave function
(AF) scheme followed by Power Spectrum (PS) renormalization schemes.
Addendum: Nearby active galactic nuclei and starburst galaxies as sources of the measured UHECRs anisotropy signal
Authors: de Oliveira Cainã , de Souza Vitor 
Published: November 2023

Abstract
The CRPropa developers emitted a note reporting problems in the Extragalactic Magnetic Field (EGMF) models used in this paper. In this addendum, we present some differences obtained using the updated results based on the new version of the EGMF models. All the main conclusions presented in the paper remain valid.
Enhancing force sensing in a squeezed optomechanical system with quantum non-demolition measurement
Authors: Chao Shi-Lei , Li Zi-Hao , Lü Xin-You 
Published: November 2023

Abstract
A theoretical scheme is proposed to enhance the sensitivity of force sensors with quantum non-demolition measurement (QND) in an optomechanical setup assisted by four-tone optical driving and an optical parametric amplifier (OPA). With the help of special drive, the system can be simplified as the typical type of QND for force sensing, so that the backaction noise can be evaded to surpass the standard quantum limit. Besides, the added noise can be suppressed owing to the modified optical susceptibility resulting from the OPA. By introducing two oscillators coupling with two charged bodies respectively, the signal can be enhanced with the nonlinearity caused by Coulomb interaction, while the noise presents an exponential decrease. Moreover, considering the homodyne detection effect, the range of system parameters and frequency bands will be broadened. The present investigation may provide a route toward simultaneously evading backaction noise, reducing the mechanical thermal noise, and enhancing the external signal, which can be an alternative design for sensitive devices.
Quantum nonlocality evolution for two entangled mesoscopic fields under decoherence
Authors: Tan Zhao-Song , Yang Shou-Bang , Yang Zhen-Biao , Zheng Shi-Biao 
Published: November 2023

Abstract
Investigation of the nonlocality evolution of entangled mesoscopic fields under decoherence not only is important for understanding the quantum–classical transition, but also has relevance to quantum communication and quantum computation protocols based on continuous variables. According to previous formulations of Bell inequalities, the system loses nonlocal features far before the disappearance of entanglement. We here construct a new version of Bell signal based on rotated and displaced on–off correlations, with which the Bell inequality is violated as long as there remains entanglement and the field state components keep quasiorthogonal. Consequently, the nonlocal character revealed by our formulation decays much slower compared with those based on previous ones. More importantly, there exists a wide regime where the Bell inequality is restored with previous formulations but remains to be violated based on our correlation operators.
The tunable resonant IC antenna concept and its design for DTT experiment
Authors: Milanesio D. , Galindo Huertas D.L. , Ceccuzzi S. , Vecchi G. , Baiocchi B. , Cardinali A. , Mascali D. , Mauro G.S. , Mirizzi F. , Pidatella A. , Ravera G.L. , Torrisi G. , Tuccillo A.A. 
Published: November 2023

Abstract
The intrinsic poor loading of Ion Cyclotron (IC) plasma-facing antennas makes the use of Tuning and Matching Systems (TMSs) a necessity. The antenna plus TMS is a resonant system; in the TMS and access lines high voltages (tens of kV) must be accounted for in the unavoidable unmatched part of the feeding lines. In this work, we propose and test an innovative type of IC launcher; it is based on achieving resonance of the self-standing antenna, i.e. without the TMS. A mechanical full-metal tuning mechanism is described and demonstrated to allow wide-band operation. A systematic analysis of possible antenna topologies has led to identifying a structure that can allow good impedance matching along with compliance with maximum electric field constraints. Most of the design is carried out using a simplified plasma and a commercial analysis tool and then validated with a realistic plasma using TOPICA code.
University Students’ Perspectives on Physics Education in Sustainable Development Goals
Authors: Suprapto N , Hidaayatullaah H N 
Published: November 2023

Abstract
This research explores university students’ perspectives on integrating sustainable development goals in physics education subjects (SDGs-PE). However, there is a few research that focuses on SDGs-PE. This research adopts a quantitative survey and is supported by a qualitative interview design. Fifty-two university students participated in the survey to fulfill the SDGs-PE instrument, and five interview participants for data collection. An exploratory factor analysis (EFA) and descriptive analysis were used to achieve the research’s goals. The research indicated that the SDGs-PE fulfills the criteria of validity and reliability. The construct validities of the SDGs-PE varied from .538 to .886 and explained 64.26% of the variance. Overall, the Cronbach’s alpha coefficient of the instrument was .812. This research has also highlighted the integration of physics education, education for sustainable development, and sustainable development goals.
Water Chestnut (Eleocharis dulcis) Microfiber Reinforced Composite with NaOH Modification
Authors: Haryanti N H , Suryajaya  , Manik T N , Safi’i A 
Published: November 2023

Abstract
This study aimed to obtain the physical and mechanical properties of a composite made from water chestnut microfiber and e-glass with a polyester matrix. Using water chestnut (Eleocharis dulcis) as reinforcement for composite materials is a good way to utilize local materials and increase the economy of local people. It would need a modified treatment to improve the mechanical properties of water chestnut fiber-reinforced composites. The water chestnut fiber was modified by treating it with 5% volume NaOH solution and continued with 5% volume H2O2 bleaching, 50% volume H2SO4 hydrolysis, and ultrasonication. Then it was washed with water and dried in the oven for 12 hours to obtain the microfiber. The size of the water chestnut microfiber obtained was about 3-9 µm. Composite was produced using the compression molding method at a pressure of 2 MPa and a temperature of 25°C. The variations in the volume fraction of the polyester composite, water chestnut microfiber, and e-glass fiber with Volume Fraction (%) were 60%:40%:0% (sample A), 60%:0%:40% (sample B), 50%:25%;25% (sample C), 60%:40%:0% (sample D) and 70%:15%:15% (sample E). The physical characterization of composites showed that the lowest composite density and water content on samples B and A were 1.22 g/cm3 and 0.59%. In contrast, the mechanical characterization of composites showed the highest MoR and MoE on samples A and C of 87.86 MPa and 10.43 Gpa, respectively. Composite made from water chestnut (Eleocharis dulcis) modified microfiber reinforcing material with 5% volume NaOH solution and e-glass with a polyester matrix at a volume fraction composition of 50%:25%:25% is recommended.
Characteristic of Nanofiber PVA-Graphene Oxide (GO) as Lithium Battery Separator
Authors: Kusumawati D H , Agustin T N 
Published: November 2023

Abstract
Batteries have many uses, so a lot of research on batteries has been developed. The part of the battery that has not been studied much is the separator, which has a crucial role as one of the battery components. The separator is the main component in the lithium-ion battery, which functions to prevent short circuits, transport free ions, and isolate electricity. The separator must have adequate porosity, high conductivity, and good thermal stability. The purpose of this research is to analyze the characteristics of the nanofiber membrane, which will be applied as a separator in lithium batteries. The material that can meet the characteristics of the battery separator is PVA-GO nanofiber. Graphene oxide was synthesized using Hummer’s method, while PVA-GO nanofiber was synthesized by electrospinning. The characterization of the separator includes conductivity, impedance, and porosity tests. The GO variations given to PVA were 0.1, 0.2, 0.3 and 0.4 gr. The resulting fiber diameter ranges from 162-194 nm, with the smallest fiber diameter being 0.2 gr GO. Nanofiber with characteristics as a membrane for separators is PVA-GO 0.4 gram, with an electrical conductivity value of 5.91×10−4 S/cm and a porosity of 42%.
Study of Performance Graphene Oxide Modification of LiFePO4/C Material for The Cathode of Li-Ion Batteries
Authors: Hana N H , Munasir  
Published: November 2023

Abstract
The need for energy storage is increasing rapidly along with technological development. Lithium ion batteries are one of the energy storages that are in great demand due to their high specific capacity and energy density, discharge voltage of 3.4 volts, and environmental friendliness. LiFePO4 is a lithium-ion battery cathode material with a high specific capacity of 170 mAh/g and a discharge voltage of about 3.4 V, thermal stability, high energy density, environmentally friendly, and easy to obtain. However, it has low electrical conductivity and poor ion diffusion, which hinders energy storage. Carbon modification is a method that has the advantage of reducing particle size and preventing agglomeration in nanoparticles, so this method is widely researched to improve lithium ion diffusion coefficient and conductivity in lithium ion batteries. This study aims to describe the effect of GO modification on the characterization of LiFePO4/C-GO composite material and LiFePO4/C-GO composite material battery performance as a lithium ion battery cathode material. In this study, it can be seen that the addition of GO in LiFePO4 cathode material can improve battery performance. The LiFePO4/C-GO-10 cathode obtained the most effective results with the lowest Rct value of 95.21 Ω and the highest conductivity value of 14.3×10-6 S/cm indicating the best electron transport. The Rct value decreased with the addition of GO, and the conductivity value increased with the addition of GO.
Validity of Teaching Modules with Problem-Based Learning (PBL) Model Assisted by E-Book to Improve Problem-Solving Skills on Renewable Energy Material and Implementation of Independent Learning Curriculum
Authors: Dwikoranto  , Dawana I R , Setiani R 
Published: November 2023

AbstractProblem-solving skills are an important basic competency in 21st-century learning through the Merdeka Belajar Curriculum. However, the problem-solving skills of students in Indonesia are still low. Therefore, an effective learning model is needed to improve problem-solving skills, one of which is through the development of teaching modules. This study aims to develop teaching modules based on Problem-Based Learning (PBL) assisted by e-books to improve the problem-solving skills of grade X high school students based on content, construct, and language feasibility. This research uses a development approach with the 4D model, which includes the stages of Define, Design, Develop, and Disseminate. However, this research only focuses on the development stage (Develop) by conducting module validation. The validation was conducted by three validators, namely educational expert lecturers and material expert lecturers. The results showed that the PBL-based teaching module to improve problem-solving skills had met the validity criteria regarding content, construct, and language. By using the mode value, a value of 4 and a validity percentage of 100% were obtained with a very valid category. Therefore, the teaching module developed is suitable for use in trials on students in the learning process to improve problem-solving skills.
LEGOBLAS (Lego Bata Plastik) Eco-friendly Solution for Plastic Waste Accumulation
Authors: Azham M A , Kurniawan A , Anjarwati A W , Suaebah E 
Published: November 2023

Abstract
The problem of waste generated by activities at UNESA can threaten the health of the environment and the welfare of the surrounding community. A solution is needed to overcome the waste problem in the UNESA environment. One solution that can be taken is to make paving blocks from plastic waste, or it can be called LEGOBLAS. This research aims to improve previous research and utilize plastic waste to be used more beneficially. In this study, data was collected through LEGOBLAS testing, which included testing for compressive strength, absorption, slipperiness, and heat strength. In addition, supporting data is also collected through external observation and LEGOBLAS measurements, including the length, width, height, and mass of LEGOBLAS. The method applied in this study is descriptive quantitative; the form of data presentation is in the form of numbers, which are then analyzed using the LEGOBLAS test. Making eco-friendly LEGOBLAS goes through several stages, including sorting plastic waste, melting plastic waste, and printing LEGOBLAS. Melting plastic using used cooking oil aims to prevent the chlorine content from being released into the air so that it is environmentally friendly. Compressive strength testing using a Compression Testing Machine, Slippage test using a Surface Roughness Tester, Absorbency Test by immersing LEGOBLAS in water for 10 minutes, and Heat Resistance Test by baking for 12 hours at 38°C. Action is needed to reduce this plastic waste; one way to reduce this plastic waste is by making LEGOBLAS a utilization of plastic waste.
Design and Prototype Testing of the Video Tracker Analysis-Based Uniformly Varied Rectilinear Motion Tool for Uniformly Accelerated Rectilinear Motion and Uniformly Decelerated Rectilinear Motion Experiments
Authors: Putri R T , Alhusni H Z , Lestari N A 
Published: November 2023

Abstract
Physics practicum activities have an important role in the learning process because they can provide convenience for students in proving theories. This research aims to develop a prototype uniformly varied rectilinear motion teaching aid based on a video analysis tracker in physics practicum. This study uses research and development with an ADDIE model. The research results show that when an object moves up, the object experiences slowed down, uniformly varied rectilinear motion. Meanwhile, when the object moves down, the object experiences uniformly varied rectilinear motion accelerated. The survey results show that 60% choose the option resulting from the uniformly varied rectilinear motion teaching aids provided adequately, 73.30% agree that the developed tool is easy to operate, and 73.30% experience an increase in understanding after using the tool. Thus, the design and testing of existing prototypes have been successful. The implications of this research can be used to improve students’ understanding of concepts through practicum activities. However, this study has limitations, namely, the results of data from Tracker Video Analysis are relatively inaccurate, both in terms of the ability of students to operate it and the inability of the device to operate it. Therefore, developing this research to obtain more accurate data is suggested.
Application of Internet of Things Technology in Safe Centralized Storage of Big Data Information
Authors: Niu Aimin 
Published: November 2023

Abstract
To solve the problem of low data processing rate in traditional medical information storage methods, a safe centralized storage method of medical big data information is proposed. The data set storage model is designed through the Internet of Things, and VeritasBackupExee is used as data recovery and backup software, and data recovery and backup are realized by the Internet of Things. Encrypted storage of ciphertext index vector is carried out by using the ciphertext storage algorithm, and the medical data center of Internet of Things middleware is constructed. By sharing storage devices with multiple hosts, highly reliable backup can be realized. The average response time of the method in this paper is different for medical big data services. The average response time for modifying service is 11ms, creating service is 12ms, and migrating service is 13.7 ms. To verify the data service response time of this method, it is necessary to verify the response performance of different methods. The results show that this method has higher data download and upload rates and faster data service response.
Bluetooth Mesh Network-based Intelligent Light Replenishment System for Agricultural Greenhouses
Authors: Wang Jicun , Tang Liang , Mu Linhai , Rao Simin , Zhang Wanli 
Published: November 2023

Abstract
Given the actual situation of greenhouse production nowadays, this paper proposes a kind of intelligent light replenishment system for greenhouses based on a Bluetooth Mesh network. The system uses the ESP32-C3FH4 microcontroller from Espressif as Bluetooth Mesh nodes to form a Bluetooth Mesh monitoring network. This paper designs an intelligent IoT device control system based on Bluetooth Mesh network technology and cloud platform services. Through the flooded network composed of Bluetooth Mesh, the natural light intensity data monitored by each service node is sent to the cloud platform periodically through the gateway, the monitored data is accessed by the cloud platform for management, and the artificial light source module is triggered according to the deposited data to realize automatic control, realizing the modernized digital management function of agricultural greenhouses.
Design of Home Environment Monitoring System Based on a Cloud Platform for the Elderly Living Alone
Authors: Cai Xiangfan , Wang Dan 
Published: November 2023

Abstract
The phenomenon of elderly people living alone was becoming increasingly common in the new era, so the demand for monitoring the living environment of elderly people living alone was becoming increasingly strong. The design of home environment monitoring for elderly people living alone was designed based on a cloud platform. The system mainly consists of an STM32 main control module, a temperature and humidity detection module, an Internet of Things module, a security module, a relay control module, and a user App terminal. Then the fuzzy PID algorithm was designed to remotely control indoor temperature and humidity. After practical operation verification, the system can perform local and remote monitoring of the living environment of elderly people living alone and has the characteristics of reliability and stability.
Digitization of production line equipment of rail transit vehicles based on index and model
Authors: Zhang Hongyue , Chang Jie 
Published: November 2023

Abstract
In the process of digital transformation of rail transit vehicles, the digitalization of production line equipment is an important content. Starting from the whole life cycle business of production line equipment, this paper improves the existing production line equipment index system, proposes the production line equipment data acquisition model, describes the equipment portrait, proposes the comprehensive evaluation system based on the equipment index model, and further explores the digital twin architecture of production line equipment based on the integration of multiple models. Improve the digital level of rail transit vehicle manufacturing production line equipment.
Vibration Reduction of Robot End Effector Based on Co-simulation Method
Authors: Lu Daixing , Zhang Yang , Lu Junjie 
Published: November 2023

Abstract
Hydraulic cylinder replacement robot as a new type of engineering machinery has been increasingly used, but its end effector encounters vibrations in the process of clamping the object, so the accuracy of disassembling and assembling the cylinder will be reduced, thus reducing the replacement efficiency and affecting the user’s experience. To address this problem, virtual prototyping technology is used to study the cylinder disassembly process under real working conditions. We use the 3D modeling software Solidworks to construct a model of the cylinder replacement robot. After that, kinematic analysis of the model is carried out, then a dynamics model is built in multi-body dynamics simulation software ADAMS to simulate the process of the robot grasping the object, as a consequence, the trajectory of the end effector is calculated. A controlled dynamic model is established with Simulink and Adams by using the co-simulation technique, and optimization is carried out by using the model. Results show that the optimized control parameter can effectively reduce the end effector vibration and improve the stability and accuracy of the work.
Numerical analysis of flow and heat transfer characteristics of supercritical endothermic hydrocarbon fuel in taper tube
Authors: Zhao Jiajun , Gao Hui , Zhang Chen , Wen Dongsheng 
Published: November 2023

Abstract
To enhance the cooling performance of the scramjet regenerative cooling system, a novel taper tube is proposed. Under supercritical pressure, the flow characteristics and heat transfer characteristics of endothermic hydrocarbon fuel (EHF) in taper tube, narrow cylindrical tube, and wide cylindrical tube are numerical investigated and compared. The results of the investigation of flow and heat transfer processes in the above three tubes indicate that the taper tube effectively facilitates the pyrolysis of n-decane and the n-decane conversion is increased by 3.94%, compared with narrow cylindrical tube. Compared with wide cylindrical tube, the taper tube enhances cooling effect and the wall temperature near the outlet is reduced by 50.16 K. The taper tube contributes to the cooling structure optimization and promotion of regenerative cooling system performance.
Design and simulation of anti-sloshing baffles applied to detumbling payload propellant tanks
Authors: Tang J C , Liang Z H , Zheng K , Zheng P 
Published: November 2023

Abstract
The method to suppress the liquid sloshing in the tank applied to the jet detumbling payload is investigated in this study. Among all kinds of anti-sloshing structures, the symmetrical annular baffle was chosen due to the features of impact on the payload’s tank. The damped mass-spring liquid sloshing model established is used to compare the damping ratio of the baffle with different baffle layers and different baffle heights. Using FLUENT software, based on VOF (volume of fluid) numerical simulation technology, the damping effect of baffles with different layers and heights is simulated. The results show that 3-layer 15mm or 4-layer 10mm baffles can effectively reduce the influence of liquid sloshing. The damping ratio of the storage tank with a 3-layer 15mm anti-sloshing baffle is at least 18.3 times that of a smooth tank, and the damping ratio of the tank with a 4-layer 10mm anti-sloshing baffle is at least 18.7 times that of a smooth tank.