bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pulsars with NenuFAR: Backend and pipelines
Authors: Bondonneau L. , Grießmeier J.-M. , Theureau G. , Cognard I. , Brionne M. , Kondratiev V. , Bilous A. , McKee J. W. , Zarka P. , Viou C. , Guillemot L. , Chen S. , Main R. , Pilia M. , Possenti A. , Serylak M. , Shaifullah G. , Tiburzi C. , Verbiest J. P. W. , Wu Z. , Wucknitz O. , Yerin S. , Briand C. , Cecconi B. , Corbel S. , Dallier R. , Girard J. N. , Loh A. , Martin L. , Tagger M. , Tasse C. 
Published: April 2021

Context.NenuFAR (New extension in Nançay upgrading LOFAR) is a new radio telescope developed and built on the site of the Nançay Radio Observatory. It is designed to observe the largely unexplored frequency window from 10 to 85 MHz, offering a high sensitivity across its full bandwidth. NenuFAR has started its “early science” operation in July 2019, with 58% of its final collecting area.Aims.Pulsars are one of the major phenomena utilized in the scientific exploitation of this frequency range and represent an important challenge in terms of instrumentation. Designing instrumentation at these frequencies is complicated by the need to compensate for the effects of both the interstellar medium and the ionosphere on the observed signal. We have designed a dedicated backend and developed a complete pulsar observation and data analysis pipeline, which we describe in detail in the present paper, together with first science results illustrating the diversity of the pulsar observing modes.Methods.Our real-time pipeline LUPPI (Low frequency Ultimate Pulsar Processing Instrumentation) is able to cope with a high data rate and provide real-time coherent de-dispersion down to the lowest frequencies reached by NenuFAR (10 MHz). The full backend functionality is described, as the available pulsar observing modes (folded, single-pulse, waveform, and dynamic spectrum).Results.We also present some of the early science results of NenuFAR on pulsars: the detection of 12 millisecond pulsars (eight of which are detected for the first time below 100 MHz); a high-frequency resolution mapping of the PSR B1919+21 emission profile and a detailed observation of single-pulse substructures from PSR B0809+74 down to 16 MHz; the high rate of giant-pulse emission from the Crab pulsar detected at 68.7 MHz (43 events per minute); and the illustration of the very good timing performance of the instrumentation, which allows us to study dispersion measure variations in great detail.
Design of a compact electron radiography system with electron source from laser wakefield accelerator
Authors: Xiao Chaofan , Xu Zhiyi , Lu Haiyang , Liu Jiaxin , Xie Chengzhi , Zhao Yanying , Geng Yixing , Huang Senlin , Zhao Sheng , Zhu Jungao , Lai Meifu , Zhang Hua , Zhuo Hongbin , Zhou Cangtao , Yan Xueqing 
Published: April 2021

A compact electron radiography system has been designed with high gradient permanent magnet quadrupoles with 2.5 times magnification. Quasi-monoenergetic electron bunches with energies ranging from 100 to 200 MeV are generated from a laser wakefield accelerator (LWFA) acting as the electron source for the system. A matching segment composed of three quadrupoles before the objective plane creates a correlation between the position and the angle for the electrons, illuminating the observed object improved the resolution of the system. We expect electron radiography with 100-MeV ultrafast electron bunches to be widely adopted for many applications, especially considering the micron-level spatial resolution and sub-picosecond temporal resolution of the electron source from the LWFA. Since the laser system needed for generating 100–200 MeV electrons using the LWFA is roughly around 40 TW, the whole system can be effectively table-top in size, which is favorable for movable applications.
The performance prediction of current drive by the upgraded neutral beam on EAST
Authors: Wang Ji , Chen Jiale , Wu Bin , Chen Yuqing , Yang Zhen , Hu Chundong , Xie Yuanlai , Xie Yahong , Zhang Xuexi 
Published: April 2021

Abstract
The neutral beamline originally located on Port F is being modified to Port D and the injection direction is changed from clockwise injection (counter-IP) to counterclockwise injection (co-IP) on EAST. The operational quality of the two neutral beamlines will also be upgraded in the following months. The neutral beam current drive (NBCD) of the two upgraded beamlines is substantially improved due to the change from the balanced-injection to the same direction injection with the plasma current by simulation with ONETWO/NUBEAM and TRANSP/NUBEAM codes. Discharge scenarios with the typical parameters are modeled to evaluate NBCD performances for the upgraded beams at beam energy below 70 keV. The maximal NBCD in the prediction exceeds 117 kA which is much higher than the previous level. The simulation results indicate that NBCD after the upgrade are improved with the increase of the beam power and electron temperature Te. The increased plasma density can result in a decrease in NBCD, but it will also lead to a substantial increase in bootstrap current which occupies the dominant fraction of non-induced current. The NBCD can be partly enhanced due to the reduction of the electron shielding effect with the proper increase of

Z

e
f
f

.

These simulation results demonstrate the performances of NBCD after beams upgrade, and can also provide some valuable guidance for future experiments on EAST.
M-shape and W-shape bright incite by the fluctuations of the polarization in a-helix protein
Authors: Abbagari Souleymanou , Douvagaï Douvagaï , Houwe Alphonse , Doka Serge Y , Inc Mustafa , Crepin Kofane T 
Published: April 2021

Abstract
In this work, under consideration is the coupled system of nonlinear Schrödinger (NSL) and Boussinesq equations that serves as model to study the polarization fluctuation in α-helical protein. M-shaped and W-shaped solutions have been derived through the new modified Sardar sub-equation technique (SSEM). These solitons solutions define the polarization dynamics in the α-helical protein. The integration naturally leads to a constraint condition placed on the solitary wave variables which must hold for the solitary waves to exist. In addition, the standard linear stability analysis has permitted to study the behavior of the Modulation Instability (MI) gain spectra. Numerical simulation and physical interpretations of the acquired results are demonstrated. The derived structure of the acquired solutions give a rich platform to better understand the nonlinear dynamics in the α-helical protein.
Study of the high lying electric dipole excitations in Odd-A 153–159Eu isotopes
Authors: Tabar E , Yakut H , Kuliev A A , Quliyev H , Hoşgör G , Kemah E 
Published: April 2021

Abstract
In this paper, we have studied the electric dipole (E1) transitions in odd-mass 153–159Eu nuclei within Translational+Galilean Invariant Quasiparticle Phonon Nuclear Model (TGI-QPNM). Within the scope, the Giant and Pygmy Dipole Resonances (GDR and PDR) have been investigated in the energy range of 5–20 MeV. The numerical results show that the contribution of PDR and GDR to the total E1 strength is 2% and 98%, respectively. It has been found that the TGI-QPNM predicts the double hump structure and that the agreement between theoretical results and the existing experimental data is perfect, especially near the neutron binding energy Sn and the first hump of the GDR. Also the comparison of the theoretical results and the existing experimental data shows reasonable agreement for the integrated moments of the cross-sections in the GDR region. We can also deduce from the structure analysis of excited states the studied isotopes, that the GDR states can be considered to be more collective than the PDR states.
Stationary distribution extinction and optimal control for the stochastic hepatitis B epidemic model with partial immunity
Authors: Din Anwarud , Li Yongjin 
Published: April 2021

AbstractIn this paper, a stochastic model (with random noise transmission) is designed. The model possesses substantial potential to describe the dynamical behavior of the Hepatitis B (HBV) virus and it’s control by applying the strategy of vaccinating an offspring. The number of basic reproductive is calculated and proved that the system holds some sharp threshold properties. It is investigated that the model has a bounded, unique and positive solution subject to initial positive data. Furthermore, the stability of the investigated system has been presented by using stochastic Lyapunov functional theory. Stationary distribution and extinction of the infection are examined by providing sufficient conditions. To control the spread of the disease through some external measures, we used optimal control theory and analyzed stochastic as well as deterministic control problems. For further verification of the obtained analytical results, additional graphical solutions have been presented for the ease of understanding. This study may provide a strong theoretical basis for understanding worldwide chronic infectious diseases.
The persistence of large scale structures. Part I. Primordial non-Gaussianity
Authors: Biagetti Matteo , Cole Alex , Shiu Gary 
Published: April 2021

Abstract
We develop an analysis pipeline for characterizing the topology of large scale structure and extracting cosmological constraints based on persistent homology. Persistent homology is a technique from topological data analysis that quantifies the multiscale topology of a data set, in our context unifying the contributions of clusters, filament loops, and cosmic voids to cosmological constraints. We describe how this method captures the imprint of primordial local non-Gaussianity on the late-time distribution of dark matter halos, using a set of N-body simulations as a proxy for real data analysis. For our best single statistic, running the pipeline on several cubic volumes of size 40 (Gpc/h)3, we detect fNL
loc=10 at 97.5% confidence on ∼ 85% of the volumes. Additionally we
test our ability to resolve degeneracies between
the topological signature of fNL
loc and variation of σ8 and argue that correctly identifying nonzero fNL
loc in this case is possible via an optimal template method. Our method relies on information living at 𝒪(10) Mpc/h, a complementary scale with respect to commonly used methods such as the scale-dependent bias in the halo/galaxy power spectrum. Therefore, while still requiring a large volume, our method does not require sampling long-wavelength modes to constrain primordial non-Gaussianity. Moreover, our statistics are interpretable: we are able to reproduce previous results in certain limits and we make new predictions for unexplored observables, such as filament loops formed by dark matter halos in a simulation box.
Two-proton radioactivity of exotic nuclei beyond proton drip-line
Authors: Wang Yanzhao , Cui Jianpo , Gao Yonghao , Gu Jianzhong 
Published: April 2021

Abstract
To search for new candidates of the true and simultaneous two-proton (2p) radioactivity, the 2p decay energies (Q
2p
) are extracted by the Weizsäcker–Skyrme-4 (WS4) model, the finite-range droplet model (FRDM), the Koura–Tachibana–Uno–Yamada (KTUY) model and the Hartree–Fock–Bogoliubov mean-field model with the BSk29 Skyrme interaction (HFB29). Then, the 2p radioactivity half-lives are calculated within the generalized liquid drop model by inputting the four types of Q
2p
values. By the energy and half-life constraints, it is found that the probable 2p decay candidates are the nuclei beyond the proton-drip line in the region of Z ≤ 50 based on the WS4 and KTUY mass models. For the FRDM mass model, the probable 2p decay candidates are found in the region of Z ≤ 44. However, the 2p-decaying candidates are predicted in the region of Z ≤ 58 by the HFB29 mass model. It means that the probable 2p decay candidates of Z > 50 are only predicted by the HFB29 mass model. Finally, the competition between the true 2p radioactivity and α-decay for the nuclei above the N = Z = 50 shell closures is discussed. It is shown that 101Te, 111Ba and 114Ce prefer to 2p radioactivity and the dominant decay mode of 107Xe and 116Ce is α-decay.
High energy window for probing dark matter with cosmic-ray antideuterium and antihelium
*
Authors: Ding Yu-Chen , Li Nan , Wei Chun-Cheng , Zhou Yu-Feng 
Published: April 2021

Abstract
Cosmic-ray (CR) anti-nuclei are often considered important observables for indirect dark matter (DM) detection at low kinetic energies, below GeV per nucleon. Since the primary CR fluxes drop quickly towards high energies, the secondary anti-nuclei in CR are expected to be significantly suppressed in high energy regions (
\begin{document}$\gtrsim 100$\end{document}
GeV per nucleon). If DM particles are heavy, the annihilation productions of DM can be highly boosted, and thus the fluxes of anti-nuclei produced by DM annihilation may exceed the secondary background at high energies, which opens a high energy window for indirect DM detection. We investigate the possibility of detecting heavy DM particles which annihilate into high energy anti-nuclei. We use the Monte Carlo generators PYTHIA, EPOS-LHC and DPMJET and the coalescence model to simulate the production of anti-nuclei, and constrain the DM annihilation cross-sections by using the AMS-02 and HAWC antiproton data and the HESS galactic center
\begin{document}$ \gamma $\end{document}
-ray data. We find that the conclusion depends on the choice of DM density profiles. For the “Cored” type profile with a DM particle mass
\begin{document}$\gtrsim 10$\end{document}
TeV, the contributions from DM annihilation can exceed the secondary background in high energy regions, which opens the high energy window, while for the “Cuspy” type profile, the excess disappears.
Analysis of Zcs
(3985) as the axialvector tetraquark state *
Authors: Wang Zhi-Gang 
Published: April 2021

Abstract
In this study, we choose the scalar and axialvector diquark operators in the color antitriplet as the fundamental building blocks to construct four-quark currents and investigate the diquark-antidiquark type axialvector tetraquark states

in the framework of the QCD sum rules. The predicted tetraquark mass

is in excellent agreement with the experimental value

from the BESIII collaboration, which supports identifying

as the cousin of

with quantum numbers

. We take into account the light flavor

mass-breaking effect to estimate the mass spectrum of the diquark-antidiquark type hidden-charm tetraquark states with strangeness according to previous studies.
Exploring the halo phenomena of medium-mass nuclei having approximately Z= 40 with point-coupled parameters in complex momentum representations *
Authors: Chu Yao-Wu , Heng Tai-Hua 
Published: April 2021

Abstract
To explore the properties of neutron-rich nuclei with approximately 40 protons, the density-dependent point coupling (DD-PC1) effective interaction parameter is adopted in the relativistic mean-field theory with the complex momentum representation (RMF-CMR). The calculated two-neutron separation energy (S
2n
) and root-mean-square (rms) radii support the halo structure that appear in Mo and Ru isotopic chains. Besides, the neutron skin structures appear in Kr and Sr isotopes. The conclusions drawn are also supported by the single-particle energy levels and their occupancy probability and density distribution. Particularly, the energy levels, which reduce to bound states or are approximately 0 MeV with a small orbital angular momentum, are suggested to provide the primary contribution to increasing the neutron radius. Moreover, the single-particle energy levels significantly reflect the shell structure. In addition, the neutron drip line nuclei for Kr, Sr, Mo, and Ru elements are proposed via the changes in S
2n
.
Slope stability analysis in various Terraces model (case study: Sendangmulyo, Tirtomulyo District, Wonogiri Regency)
Authors: Surjandari Niken Silmi , Fitri Siti Nurlita , Purwana Yusep Muslih , Prakosa Brilian Budi , Djarwanti Noegroho , Setiawan Bambang , Dananjaya Harya , Saido Agus P 
Published: April 2021

Abstract
Wonogiri has various contours. Steep slopes dominate some areas. Hence it has a high possibility to occur landslides. There are still a lot of people living under the slopes. Therefore, this research is essential for disaster mitigation purposes. The study aims to know how the value of the slope safety factor changes with construction terraces design. The research was conducted by collecting secondary data and improving the Terraces construction carried out. The data was analyzed in the limit equilibrium method to provide conditions before and after the rain. The models were tried with several Terraces variations on the slope to obtain the most optimal design. The results used a simplified Bishop method. The design of terraces on the slopes of Sendangmulyo Wonogiri Village shows that the SF value increase is only for the conditions before a rain. In contrast, the states after the rain do not yield a safety condition. The SF value increases if the number of steps increases, whereas the more step height increases, the less the SF value will be.
Probability Analysis of DAMRI Bus Mode Selection on the Operation of Adi Soemarmo International Airport (BIAS) Train
Authors: Ardani  , Handayani Dewi , Syafi’i  
Published: April 2021

Abstract
Adi Soemarmo International Airport railway’s construction is an investment in the transportation sector expected to encourage the tourism sector in Joglosemar (Jogja-Solo-Semarang) Area. Adi Soemarmo International Airport (BIAS) train from Solo to the airport with a distance of about 13.5 km is an alternative to public transportation besides the preexisting DAMRI Bus service. For this reason, this research aims to obtain a probability value for choosing the mode between DAMRI Bus and BIAS Train. The variables used in this research were travel time, tariff, and waiting time using the stated preference technique. The primary data were then processed using logistic regression analysis to obtain the probability values. The results show that the probability value of the fastest travel time in the choice of condition one or scenario 9. The value obtained from comparing airport trains’ use compared to DAMRI buses saves 17 minutes, a reduced waiting time of 22.5 minutes, and cheaper ticket costs around Rp. 10,000. There was a 99.59% increase in passenger displacement from DAMRI buses to BIAS trains from all these comparisons.
An Integrated Inventory and Order Pickup Model in the MVSB System considering Capacities of Vendors
Authors: Marpaung Budi , Aribowo Wisnu , Suprayogi  , Halim Abdul Hakim 
Published: April 2021

Abstract
To reduce inventory and pick-up costs, a mutually beneficial collaboration between suppliers and manufacturers is the basis for developing an integrated inventory and order pick-up model, known as Inbound Inventory Routing Problems (IIRP). Unfortunately, the IIRP model developed so far has not been able to accommodate several manufacturing industry problems, including vendors’ limited capacities. Concerning these conditions, this study aims to develop an IIRP model in the Multi-Vendor Single-Buyer (MVSB) systems considering suppliers’ limited capacity. The total relevant cost consisting of set-up costs, ordering costs, holding costs, and the pick-up cost is kept to a minimum. The IIRP model developed in this study is classified as mixed-integer non-linear programming (MINLP), which can be solved using an analytic, heuristic, or metaheuristic approach. Model testing was carried out on the MVSB system by developing three numerical examples. Each of them involved three suppliers of similar parts, then solved using an analytic approach. The results obtained show that the three numerical examples’ global optimum solutions were found. Based on these numerical models and criteria, it is recommended that parts pick-up from suppliers be carried out as often as possible in small lot sizes, consistent with the JIT procurement.
Rainwater Harvesting for Water Security in Campus (case study Engineering Faculty in University of Pancasila)
Authors: Ariyani D. , Wulandari A. , Juniati A. , Nur Arini R. 
Published: April 2021

Abstract
Global climate change is a worldwide issue affecting rain and groundwater supplies. To realize the SDGs’ 6th goal regarding clean water and proper sanitation, Rainwater Harvesting (RWH) is one solution for pure water requirements and useless groundwater. RWH, which is equipped with infiltration wells, can overcome water scarcity during the dry season and reduce flooding in the rainy season. This research was conducted to harvest rainwater that falls on the roof into the reservoir to the ground, so it is necessary to calculate the rainwater availability and water demand to design RWH building plan. This research was conducted at the Faculty of Engineering, Pancasila University, which uses groundwater for essential water requirements. Two RWH reservoirs are planned in different locations, with the dimensions of the RWH reservoir are 4 m (length) x 3.5 m (width) x 3 m (height). Based on the flood discharge from the roof of 84 m3, the amount of water needed is 19.4 m3. For that, it is necessary to be equipped with 4 infiltration wells with a diameter of about 1.5 m and a height of 3 m to store groundwater around 6.402 m3. RWH application can also be applied to campus that use groundwater to reduce groundwater use.
A mixed-integer linear programming formulation for assembly line balancing problem with human-robot shared tasks
Authors: Nugraha Raden Cahyadi , Ma’ruf Anas , Nugraha Andi Cakravastia , Halim Abdul Hakim 
Published: April 2021

Abstract
Human-robot collaboration (HRC) has arisen as a promising technology to improve the productivity of assembly processes. This paper discusses an assembly line balancing problem (ALBP) where manual, robotic, or HRC operations may be considered decision alternatives. Each assembly process task may be operated either by a human operator, a robot operator, or an HRC. This possibility of shared functions between humans and robots may result in a hybrid manual-robotic assembly line. This problem’s mathematical model is developed based on the simple ALBP and modifying the idea of two-sided ALBP, with additional aspects related to resource alternatives of human, robot, or HRC, and robot’s tool-type for the operations. The problem is formulated analytically in a mixed-integer linear programming model with a cost-oriented objective function. The exact method can be applied to obtain an optimal solution.
Investigation of the immersion resistance of the HRS-WC mixtures with applying static loading
Authors: Sunarjono S , Hidayati N , Magfirona A , Prakoso AD 
Published: April 2021

Abstract
The inclusion of rainwater often compounds the damage to the road before reaching the plan life through the surface and shoulders of roads. This can lead to the release of aggregates and exfoliation of asphalt on the surface layer. The study aims to determine the level of road durability against the Marshall, volumetric, and durability properties of the HRS-WC mixture. The study used various static loading 100 Kpa, 150 Kpa, and 200 Kpa with immersion. In the immersion method, there are two differences, namely, immersion with and immersion without loading. The test objects’ loading using a simple and economical test tool utilizes the beams and iron cylinders obtained from the laboratory, testing using Marshall Test. The results of the analysis obtained the durability of unloading soaked value higher than the load. The analysis results showed that the durability of the mixture was soaked seven days with a load of 100 KPa was 77.40%, for 150 Kpa amounted to 52.02%, and for 200 KPa, which is 47.67%. Analysis results showed a 7-day immersion value with a cumulative load of 68.38%, while analysis results showed a seven day immersion value with periodic loading of 75.43%.