bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thermodynamical properties of hot and magnetized quark matter within the SU(2) Polyakov-Nambu-Jona-Lasinio model: vacuum magnetic regularization scheme
Authors: Avancini Sidney S. , Farias Ricardo L. S. , Pinto Marcus B. , Tavares William R. , Restrepo Tulio E. 
Published: October 2022

Abstract
In this work we implement the recent proposed vacuum magnetic regularization (VMR) scheme to the two flavor Polyakov–Nambu–Jona-Lasinio model in order to describe some basic thermodynamic properties such as the pressure, entropy and energy density. We show that this procedure allows the evaluation of the renormalized magnetization, which agrees with LQCD data. Potential physical differences are also explored when other three possible regularization schemes are adopted to describe the chiral condensate.
Neutron diffusion in magnetars as a source of astrophysical bursts
Authors: Bertulani C. A. , Lobato R. V. 
Published: October 2022

Abstract
Neutron tunneling in neutron star crusts can release enormous amounts of energy on a short timescale. We have clarified aspects of this process occurring in the outer crust regions of neutron stars when oscillations or cataclysmic events changes the crustal ambient density. We report a time-dependent Hartree-Fock-Bogoliubov model to determine the rate of neutron diffusion and conclude that a large amount of energy, in the range of ∼ 1040 – 1044 erg, can be released rapidly. We suggest that this mechanism may be the source of hitherto unknown phenomena such as the Fast Radio Bursts (FRBS).
Neutron star crust properties: comparison between the compressible liquid-drop model and the extended Thomas-Fermi approach
Authors: Grams G. , Margueron J. , Somasundaram R. , Chamel N. , Goriely S. 
Published: October 2022

Abstract
We present a detailed analysis of three models predicting the properties of non-uniform matter in the crust of neutron stars: the compressible liquid-drop model, the fourth order Extended Thomas Fermi (ETF) method, and ETF plus Strutinsky integral (ETFSI) correction. The former treats the nuclear clusters as uniform hard spheres, the second takes into account the density distribution which can be different for neutrons and protons, and the last one includes the proton shell effects within the Strutinsky approach. The purpose of this work is to understand the importance of the improvements in the nuclear modeling and to analyze the quantities which are the most sensitive to them. We find that thermodynamic quantities such as pressure, energy and chemical potential, as well as the electron fraction, are in very good agreement among the three models. This confirms previous results where we have shown that the improvement in the finite-size description of the nuclear clusters has a small impact on these quantities, since they are mainly constrained by the bulk properties. The refinements in the finite-size modeling are shown to impact mostly the composition of the nuclear clusters (Z
cl, N
cl) in an ordering which ranks according to the leptodermous expansion. This analysis is performed considering both the r-cluster and the e-cluster representations. The proton shell effects are shown to stabilize Z
cl, which consequently impacts the neutron number N
cl as well.
Resonant scattering measurement for 11C using thick target in inverse kinematics
Authors: Kaur Gurpreet , Guimarães V. , Zamora J.C. , Assunção M. , Alcantara-Nunez J. , de Lara A.L. , Zevallos E.O.N. , Ribeiro J.B. , Lichtenthäler R. , Pires K.C.C. , Santos O.C.B. , Morcelle V. , deBoer R.J. 
Published: October 2022

Abstract
The resonant scattering of 10B+p reaction was measured at θ
c.m.= 180°, 170°, 160°, 150° and 140° using a 35.93 MeV 10B beam to investigate the spectroscopy of 11C with the thick target inverse kinematic method at RIBRAS facility, IFUSP, São Paulo. Influence of the stopping power uncertainty on the resonant scattering cross section values for 11C in the 10B(p, p)10B reaction is shown. The data measured for the reaction channels p(10B,α) and p(10B,3He) is also presented. Interestingly, the cross sections for the 3He channel are observed upto 2 MeV below the lowest energy measurement available in literature.
Isomeric state in the odd-odd 68Ga nucleus
Authors: Escudeiro R. , Vasconcellos C.E.C. , Allegro P.R.P. , Medina N.H. , Toufen D.L. , Added N. , Aguiar V.A.P. , Alberton S.G.P.N. , Alcántara-Núñez J. , Guazzelli M.A. , Macchione E.L.A. , Oliveira J.R.B. , Ribas R.V. , Scarduelli V.B. 
Published: October 2022

Abstract
The half life of the 7− isomeric state of the odd-odd 68Ga nucleus was measured using a particle-γ delayed coincidence technique. The 68Ga nuclei were produced using the fusion-evaporation reaction 55Mn(16O,2pn)68Ga at 55 MeV incident beam energy. The beam was produced by the 8 MV Pelletron accelerator of the Nuclear Physics Open Laboratory of the University of São Paulo. The half life was measured using the Isomeric State Measurement System (SISMEI). The obtained value was 60.83(25) ns, compatible with previous measurements. The 68Ga excited states were well described with the Large Scale Shell Model using the JUN45 residual interaction.
Model on degradation of thick solid molecular targets by energetic ion and electron beams
Authors: Silveira E F da 
Published: October 2022

Abstract
Thick targets are those inside which incoming projectiles lose all or most of their kinetic energy. One of the main characteristics of these systems is the highly inhomogeneous degradation of molecular samples as a function of depth; as a consequence, the molecular destruction rate during irradiation differs substantially from the expected exponential decrease. The proposed model predicts the profile of the molecular damage as function of depth in the target as well as the evolution of the molecular column density as a function of beam fluence. Codes, such as TRIM and CASINO, are used to extract collisional information on the projectile-solid interaction which, in turn, is used to determine the dependence of destruction cross sections on depth. Theoretical predictions are presented. Comparisons with experimental data are referenced.
COTS Tolerant to Total Ionizing Dose (TID): AlGaN/GaN-based transistor 10 KeV X-ray Analysis
Authors: Bôas A.C.V. , Alberton S.G. , de Melo M.A.A. , Santos R.B.B. , Giacomini R.C. , Medina N.H. , Seixas L.E. , Finco S. , Palomo F.R. , Guazzelli M. A. 
Published: October 2022

Abstract
Gallium nitride commercial transistors (GaN FET) are great candidates as power devices tolerant to the effects of Total ionizing dose (TID). Therefore, we have evaluated its robustness by analysing parameters in its characteristic parameters. Devices were exposed to a 10 keV X-ray source accumulating a total of 350 krad(Si). However, results indicate that the tested components are more tolerant to the effects of TID when in on-state mode rather than the off-mode, that is, when the device is working, which is good news for COTS applications in environments subject to the effects of ionizing radiation.
Performance and optimization of a GEM-based neutron detector using a parameterized fast simulator
Authors: Felix dos Santos R. , Munhoz M. G. , Moralles M. 
Published: October 2022

Abstract
Neutrons can be detected indirectly through a nuclear reaction where the products are ionizing radiation. Due to the shortage of 3He, several studies are searching for alternatives, where the Gas Electron Multiplier (GEM) detector using a layer of 10B as a neutron converter is a very promising option. The GEM detectors are a type of Micro-Pattern Gaseous Detectors (MPGD), widely used in particle tracking systems, as the Time Projection Chamber of the ALICE experiment in the LHC-CERN, and proposed for many other applications, including neutron detection. A common strategy to simulate this kind of detector is based on two frameworks: Geant4 and Garfield++. Given the high ionizing power of these nuclear reaction products, a full simulation is very time consuming then a fast simulator was developed using a parameterization strategy based on these two frameworks that allowed to generate enough data to study an optimized version of this detector. In this proceeding, it is shown the optimization that improves the position resolution by changing the gas mixture and/or its pressure.
Development of miniaturized portable metric internal thread contact detector
Authors: Lu C Y , Shih C L , Su M S , Huang Y K , Wu H F , Tseng C L , Liao C W 
Published: October 2022

AbstractBecause the thread is easy to install, disassemble, and replace, and most of the threads have been standardized, the miniaturized internal thread structure is quite special, the size is extremely small, and the space position is limited, so that the current common measurement mechanism cannot achieve effective measurement. Based on the above reasons, this research aims to develop a portable miniaturized metric internal thread contact detector. The parameter values that can be detected by the detector respectively include the hole diameter value under the inner thread before tapping, the minor diameter value and the major diameter value of the internal thread after tapping. Then, use the quadratic element measuring instrument to measure three parameter values, namely the lower diameter value, the smaller diameter value of the internal thread, and the value of the major diameter of the internal thread. It is then verified with the theoretical value of the metric internal thread, which proves that the experimental parameter values designed in this study are consistent with the theoretical values. That is to say, the miniaturized metric internal thread detector can be applied to any miniaturized metric internal thread detection place, and can accurately detect the obtained parameter values, and can overcome the detection limitation given by the miniaturized internal thread in the space structure. Finally, the easy availability of the detector and the relatively low cost are its main development advantages.
The die holder interaction variable analysis of 1D2B screw heading machine and its adjustment algorithm design
Authors: Wen C C , Sung X Y , Liu K C , Yang C M 
Published: October 2022

Abstract
Die forming is a key process in a production line of metal screw manufacturing, the most commonly used industrial process equipment type is one-die two-blow (1D2B) heading machine. Current solutions for die holder adjustment among manufacturers rely mostly on inheritance of experience. The lack of systemized solutions for fundamental machine tuning causes a gap in technological and intelligent upgrade. This study analyzed the most difficult eccentric tuning of the 1D2B heading machine. The adjustment behaviour of die holder from first blow and second blow were systemized, and the relevant interaction was divided into the following procedures: first die eccentric component adjustment, second die eccentric component adjustment, decoupling of interactions, and precompensation process design. The dimensional differences corresponding to die holder adjustment mechanisms were used to allow operators to implement the adjustments sequentially to complete die holder tuning. This study developed a systemized tuning procedure based on designed algorithm. In the developed procedure, precompensation coupling design was conducted for effectively reducing tuning errors. Tuning based on the proposed procedure enabled the precise adjustment of the die holder positions relative to the eccentric errors of corresponding manufacturing dimensions. The developed procedure can solve the problems of manual trial-and-error operations and excessive abrasion of the die holder resulting from unstable tuning qualities. Key parameters proposed by one type of heading machine, such as equipment die holder’s adjusted pitch, die center distance, and position of the axis of rotation, were examined regarding the proposed adjustments to verify the feasibility of the systemized tuning method.
Finite element simulations and experiments of cold drawing of stainless steel rods
Authors: Hwang Y M , Lin M R , Tsui H S R 
Published: October 2022

Abstract
Drawing is a commonly used metal forming method in the industry, it is an effective method to manufacture wires, bars or tubes with smooth surfaces and high precision in size. In this study, the effects of several forming parameters including die angle, reduction ratio, bearing ratio, friction coefficient and drawing speed on the product dimensions of AISI-316 stainless steel rods are investigated. The drawing processes are first simulated using different forming parameters, an empirical formula relating the product diameter to the forming parameters is then derived and verified by experiment. The percentage difference between the experimental, simulated and calculated results is found to be less than 1%. Using this formula, the dimensions of cold-drawn AISI-316 stainless steel can be predicted more easily and quickly. Metallographic observations and hardness tests are also conducted.
FEM simulation on forward extrusion of bi-metal rod
Authors: Huang S W , Huang P H , Tzou G Y 
Published: October 2022

Abstract
This study proposes FEM simulation on forward extrusion of bi-metal rod comprised of Aluminum (Core) and Copper (Sleeve). A Deform-2D commercial software with constant shear friction is used to explore the forming characteristics, such as the effective stress, the effective strain, the velocity field, the extrusion force, the die stress, the ratio of inner diameter to outer diameter at exit after the deformation (the aspect ratio). Besides the extrusion forces and the aspect ratio after the deformation obtained by FEM 2D can be compared with the upper bound method (UBM) and the experiment from Hwang [13]. It notes that the results are in a good agreement among three methods. Therefore the results from FEM 2D can be verified to be feasible from the experiment and UBM.
Multi-pass EDM process planning for the surface treatment of powder-bed-fusion AM CORRAX mold steel
Authors: Hsue A W J , Liao C C , Lu L W 
Published: October 2022

Abstract
Although it is time-consuming to perform multi-pass electrical discharge machining (EDM) processes, EDM is exceedingly feasible for processing the partially unmelt profile of Powder-Bed-Fusion additive manufacture mold steel. This study is based on the principle of removing three times the thickness of the recast layer and reducing the EDM processes depth. And then, the surface quality and the processing time with EDM passes are decreased by adjusting the EDM passes suggested by the machine builder. Secondly, reduction of four more passes and the predetermined depth of processing so that the total processing time can be reduced further. Finally, the efficiency is increased by more than 77% compared to machine builder’s processes, and the final surface roughness reaches the specification of 0.17 μm Ra. The HAZ and recast layer thickness are also reduced drastically and distributed uniformly. Therefore, a new version of the EDM process planning suitable for AM CORRAX mold surface treatment is proposed, and its processing efficiency and surface integrity are investigated.
Power-flow study for a hybrid AC/DC power system based on the Secant method and the Unified method
Authors: Hsu W T , Chen Z M , Huang C W 
Published: October 2022

Abstract
High voltage direct current (HVDC) transmission benefits cross-provincial long-distance transmission and nonconcurrent interconnection between frameworks than electric power transmission. Due to the different nature of electric power transmission, the power system analysis has evolved from a pure AC power system to a hybrid AC/DC power system. The high-power electrical energy is transmitted under the premise of the hybrid AC/DC power system. It is necessary to monitor the power flow of the hybrid AC/DC power system to avoid substantial economic losses. Therefore, studying the power flow for such a massive power system is crucial. This paper is proposed to apply the secant method and the unified method to analyze the power flow distribution for the hybrid AC/DC power system. First, the initial value is optimized by using the secant method. Then the optimized value is acted as an initial condition used in the unified method. The results show the combined method’s effectiveness and practicability through the power flow analysis using the IEEE 14-Bus system as the simulation model.
Study on advanced assembly characteristics of locking with radial anti-loosening precision locked-nut while maintaining the design rigidity under dynamic precision fastening system
Authors: Chen C M , Chang H L , Syu J H 
Published: October 2022

Abstract
The rigidity of the precision fastening system is often reduced due to dynamic vibration after design assembly rigidity. Without an anti-loosening mechanism, it may even be completely loosened in severe cases. It is often used in the advanced assembly of important precision components or important precision transmissions, what is can keep the stable design dynamic rigidity. The relative fixation of the mechanism, due to the reduction of structural rigidity, often leads to problems such as reduced use accuracy, difficulty to grasp the vibration frequency, and reduced service life. In this paper the clamp locking precision locked-nut that is commonly used in precision fastening systems under dislocation vibration. Through the experiment of the forced dislocation vibration environmental factors to discuss the axial force is affected. To achieve the advanced assembly under keeping the stable design dynamic rigidity of the precision fastening system during dynamic use. In this paper, Assembling the clamp locking precision locked-nut on the precision system are simulated of the conditions, and the experimental target axial forces are 3000N, 5000N, and 7000N, respectively. The designed rigidity after forced dislocation vibration under the advanced assembly characteristic equation is achieved. And using various precision instruments is to measure the microscopic shape and geometric changes before and after the experiment. These are including the deflection of the end face of the nut, flatness, thread angle and thread surface roughness, etc. To grasp changes of relevant dynamic characteristics, and the assembly prediction equation of the target axial force is established. The results can be regarded as an important assembly basis for machine tools, automation, precision electronic special machines, aerospace industry, etc., to improve the dynamic accuracy and stability of their related precision fastening systems.
Mechanical properties and microstructure of cold-rolled Scalmalloy® (Al-4.5Mg-0.6Sc-0.3Zr alloy) at a low reduction in thickness
Authors: Turangi C , Häslich F , Schaefer M , Nomani J , Pasang T , Jehring U , Weißgärber T 
Published: October 2022

Abstract
A selective laser melted Al-4.5Mg-0.6Sc-0.3Zr alloy, also known as Scalmalloy®, was cold-rolled at two different reductions in thickness to observe the effect on microstructure and mechanical properties. Optical microscopy, scanning electron microscopy, tensile testing with digital image correlation, surface roughness testing and microhardness testing was used to examine samples. Hardness increased significantly in the 30% cold-rolled condition – 20.2% in the horizontal plane, 12.5% in the transverse plane, and 18.2% in the longitudinal plane. Surface roughness was reduced to as low as 1.2μm for cold-rolled conditions compared to >15μm for as-built conditions. Yield strengths were less for cold-rolled conditions compared to as-built and ultimate tensile strengths were similar for as-built and 10% cold rolled conditions. However, 30% cold-rolled condition saw a 10.8% increase compared to as built. Strain distribution among samples was uniform for as-built conditions but concentrated in certain areas for cold-rolled conditions. SEM micrographs of fracture surfaces showed some very ductile fractures evident from dimpling. The microstructure was heavily deformed for all cold-rolled conditions in all build directions showing flattened, elongated grains and grain refinement in both the coarse grain and fine grain regions present in Scalmalloy, especially for the 30% cold-rolled condition.
Eco-friendly oxalic acid and citric acid mixed electrolytes using for plasma electrolytic polishing 304 stainless steel
Authors: Chen H L , Zhang Y X 
Published: October 2022

Abstract
The traditional of mixed electrolyte of H2SO4 and H3PO4 widely used in electropolishing 304 stainless steel. Due to environmental protection and safety issues, there is an urgent need to develop more environmentally friendly electrolytes. In this study, 304 stainless steel was electropolished by plasma electropolishing using a mixed electrolyte of oxalic acid and citric acid, which are environmentally friendly electrolytes. The mixed electrolyte concentration of oxalic acid and citric acid were 0.01 M, 0.05M, 0.1M, 0.3M and 0.5 M, respectively. The volume mixing percentage is adjusted to about 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8, respectively. Plasma power is about 1.3 kW, electrolysis time is 5 and 1 minutes, respectively. The results show that low-concentration mixed electrolyte, shortened electrolysis time and proper electrolyte mixing ratio, can obtain better surface roughness. The mixing ratio of oxalic acid and citric acid mixed electrolyte, and the factors that may affect the surface roughness of plasma electropolished 304 stainless steel, will be discussed in the text.
Research on intrusion detection method based on 1D-ICNN-BiGRU
Authors: Liu Runjie , Ji Chaoqiang , Niu Jinle , Guo Bingjie 
Published: October 2022

Abstract
Intrusion detection is one of the effective ways to secure the network. Based the unbalanced network traffic data between different attacks, the intrusion detection algorithm turns out to be low intrusion detection accuracy and low identification rate of minority attacks. To solve the problems, an improved intrusion detection model combined with one-dimensional convolutional neural network and bidirectional gated recurrent unit(1D-ICNN-BiGRU) is proposed. First, the dataset is balanced by the SMOTE-Tomek algorithm, then 1D-ICNN-BiGRU is performed for feature extraction, and the final fully connected layer of the model is replaced by global average pooling. The results show that based on the balanced data, the proposed model achieves higher intrusion detection accuracy for R2L and U2R attack than other classic intrusion detection models. The proposed model also improved the identification rate of minority attacks, making the model accuracy rate reach 95.53%, and the false positive rate is only 2.98%.
A Novel Perspective towards SVM Combined with Autoencoder
Authors: Zou Deqiang , Man Hongtao 
Published: October 2022

Abstract
In this paper, we propose a novel perspective towards the hybrid algorithm about support vector machine combined with neural network. We suggest that the depth of convolution neural network is supposed to insight the view of machines to acquiring an equal level of features as human do. The kernel function of support vector machine can be grasped flexibly where the neural network makes an efficient cross calculation for features exactly instead of the kernel function but more adjustable. To develop such a coincident format, we build a hybrid model with the half former part of autoencoder working as the kernel function and support vector machine working as the core classifier, with certain ways to train the hybrid model: discrete, continuous and prejudice. The hybrid model inherits asset of each algorithm, and that process is generally subject to the objective perspective. We take the hybrid model to Covid 19 detection compared with other well-performed models, and experimental results illustrate that our perspective is advisable which achieves a state-of-the-art performance in medical scheme.