bluuebunny/crossref_metadata_2025_split huggingface dataset:
Perspectives of dark matter indirect search with ADHD in space
Authors: Nozzoli F , Dimiccoli F , Zuccon P 
Published: May 2020

Abstract
The observation of sub-GeV antideuteron in the cosmic ray flux, could be a very strong signature of dark matter annihilation in our galaxy. Goal of the Anti Deuteron Helium Detector (ADHD) project is to study the signatures offered by an high pressure Helium target for the identification of antideuterons in space.
Performance Degradation Model of Dye-Sensitized Solar Cell (DSSC) Using Dye Extracted from Red Dragon Fruit’s Flesh
Authors: Burhan Natalia , Uranus Henri P. 
Published: May 2020

Abstract
This paper reports on the fabrication and characterization of dye-sensitized solar cell (DSSC) which utilizes dye extracted from local red dragon fruit’s flesh. The DSSC was hand-made using doctor blade method on single-sided ITO-coated TCO glass with iodine solution as the liquid charge transporter and dye infiltrated mesoporous layer made from paste of TiO2 nanoparticles powder and acetic acid. The fabricated samples were tested using an own-made solar simulator with 85 W 12 V halogen light source and measured for I-V curve using a home-made Arduino-based automated I-V measurement tool. The experiments gave best results for DSSC which used a paste composed of 1 gr of TiO2 nanoparticle powder and 3.2 ml of 15% acetic acid soaked in dye for 90 mins. The results show that a cell of 21 mm x 21 mm has open circuit voltage (V
oc) of 459.28 mV, short circuit current (I
sc) of 10.14μA, fill factor (FF) of 55.39% and conversion efficiency (η) at maximum power point (MPP) of 0.0088% at 30 minutes post assembling under exposure to 66.7 W/m2 irradiation. The DSSC degraded over time and fitted well to a two-parameter model equation. Compared to similar cell fabricated using dye taken from blackberry fruit, which exhibited η = 0.0133%, the cell with dye of red dragon fruit’s performance is worse.
Elastic Magnetic Electron Scattering from odd-A Nuclei
Authors: Sarriguren P. , Moreno O. , Moya de Guerra E. , Kadrev D.N. , Antonov A.N. , Gaidarov M.K. 
Published: May 2020

Abstract
Magnetic form factors from odd-A spherical and deformed nuclei corresponding to elastic electron scattering are calculated in the plane-wave Born approximation. The nuclear structure of the target is described within a deformed self-consistent mean-field calculation with effective interactions of Skyrme type and pairing correlations in the BCS approximation. We focus our attention to stable nuclei where experimental information is available. It is shown that the deformed formalism improves the agreement with experiment in deformed nuclei, while reproducing equally well spherical nuclei by taking properly the spherical limit of the deformed model. Effects of the collective rotation and nucleon-nucleon correlations are also studied. These results demonstrate the ability of the method to address electron scattering from unstable nuclei to be measured in future experiments on electron-ion beam colliders.
Temperature Dependence of the Symmetry Energy Components for Finite Nuclei
Authors: Antonov A N , Kadrev D N , Gaidarov M K , Sarriguren P , Moya de Guerra E 
Published: May 2020

Abstract
We investigate the temperature dependence of the volume and surface components of the nuclear symmetry energy (NSE) and their ratio in the framework of the local density approximation. The results of these quantities for finite nuclei are obtained within the coherent density fluctuation model (CDFM). The CDFM weight function is obtained using the temperature-dependent proton and neutron densities calculated through the HFBTHO code that solves the nuclear Skyrme-Hartree-Fock-Bogoliubov problem by using the cylindrical transformed deformed harmonic-oscillator basis. We present and discuss the values of the volume and surface contributions to the NSE and their ratio obtained for the Ni, Sn, and Pb isotopic chains around double-magic 78Ni, 132Sn, and 208Pb nuclei. The results for the T-dependence of the considered quantities are compared with estimations made previously for zero temperature showing the behavior of the NSE components and their ratio, as well as with the available experimental data. The sensitivity of the results on various forms of the density dependence of the symmetry energy is studied. We confirm the existence of “kinks” of these quantities as functions of the mass number at T = 0 MeV for the double closed-shell nuclei 78Ni and 132Sn and the lack of “kinks” for the Pb isotopes, as well as the disappearance of these kinks as the temperature increases.
Cyclotron project of the Institute for Nuclear Research and Nuclear Energy
Authors: Tonev D , Goutev N , Manolova M , Pavlova V N , Demerdjiev A , Nikolov A , Artinyan A , Nikolova E , Dimitrov D T , Strezov A 
Published: May 2020

Abstract
We present the cyclotron project of the Institute for Nuclear Research and Nuclear Energy which aims to centralize national the production of radioisotopes and radiopharmaceuticals and to provide opportunities for interdisciplinary research and education in the fields of Physics, Chemistry, Biology and Nuclear Energy. The human resources needed for the successful operation of the production program of the centre are also described in this article. An account of the ongoing research related to the radiation protection and radiation shielding of the cyclotron is made.
Semiclassical description of wobbling and chiral modes in triaxial nuclei
Authors: Budaca Radu 
Published: May 2020

Abstract
A time-dependent variational principle with an angular momentum coherent state as a variational state, is used to describe the dynamics associated to a triaxial rotor Hamiltonian with rigidly aligned high-j quasiparticles. Solving the variational principle within a stereographic parametrization of the coherent state, one obtains a classical energy function and a set of canonical equations of motion expressed in terms of the azimuth angle and a canonical conjugate coordinate represented by the third projection of the total angular momentum. The system’s rotational dynamics is investigated through the evolution on total angular momentum of the canonical variables as well as spherical angles corresponding to minima of the constant energy surface. The unique minimum energy conditions are spin-dependent and define phases with specific dynamic behaviour. The transition between phases is investigated for a single and two aligned quasiparticle spins. The discrete energy levels and corresponding wave-functions are obtained through a quantization procedure applied to the classical energy function. The formalism is used for numerical applications to 135Pr and 134Pr nuclei.
Unified equation of state for the outer and inner crusts of magnetars
Authors: Mutafchieva Y D , Stoyanov Zh K , Chamel N , Pearson J M , Mihailov L M 
Published: May 2020

Abstract
Magnetars form a subclass of neutron stars characterized by magnetic fields of order 1014 − 1015 G at their surface. According to numerical simulations, the magnetic fields in their interior could potentially be even stronger. Such magnetic fields are so extreme that the internal constitution of neutron stars may be altered. The effects of Landau-Rabi quantisation of electron motion on the equation of state and on the equilibrium composition of the crust of a neutron star are investigated for a wide range of magnetic field strengths. Both the outer and inner parts of the crust are treated in a unified and consistent way within the nuclear-energy density functional theory.
Pion-nucleus elastic scattering studies within the microscopic folding potential
Authors: Lukyanov K.V. , Lukyanov V.K. , Zemlyanaya E.V. , Abdulmagead Ibrahim 
Published: May 2020

Abstract
The pion-nucleus elastic scattering cross sections are calculated and compared to the data of pion scattering on 28Si, 58Ni, 208Pb at energies 162 and 291 MeV by using two kinds of the microscopic optical potentials (OPs). The first one is the folding OP, where the known nuclear density distributions are used while parameters of the elementary pion-nucleon amplitude of scattering are fitted to the data with the aim to estimate the in-medium effect, when pions are scattered not on the free but on the nuclear bounded nucleons. The analysis given when calculations are made using the local Kisslinger type OP, whose parameters are fitted to the data. The cross sections for both OPs are obtained by solving the Klein-Gordon wave equation. The role of a surface region of potentials is discusses.
Lifetime measurements of the low-lying excited states of 208Po
Authors: Kocheva D. , Yaneva A. , Kalaydjieva D. , Rainovski G. , Jolie J. , Pietralla N. , Beckers M. , Blazhev A. , Bussmann L. , Cappellazzo M. , Dewald A. , Diel F. , Djongolov M. , Dunkel F. , Esmaylzadeh A. , Falk B. , Fransen C. , Garbe J. , Gerhard L. , Gerst R.-B. , Gladnishki K. A. , Goldkuhle A. , Hackenberg G. , Henrich C. , Homm I. , Ide K. , Karayonchev V. , Kern R. , Kleeman J. , Knafla L. , Kornwebel L. , Kröll Th. , Ley M. , Müller-Gatermann C. , Scheck M. , Schmidt T. , Spagnoletti P. , Stoyanova M. , Werner V. 
Published: May 2020

Abstract
In this study we present the preliminary results about the lifetimes of the

2
2
+

,

4
1
+

states of 208Po and the upper limit of the lifetime of the

2
1
+

state. For measuring the lifetimes of the

2
1
+

and

4
1
+

states the Recoil Distance Doppler Shift (RDDS) method and for the lifetime of the

2
2
+

state the Doppler Shift Attenuation method (DSAM) were used. The resulting absolute transition strength

B
(
M
1
;

2
2
+

→

2
1
+

)
≥
0.122
(
20
)

μ
N
2

reveals the predominant isovector nature of the

2
2
+

state of 208Po.
Production and study of neutron rich heavy nuclei, GALS setup
Authors: Zemlyanoy S , Avvakumov K , Myshinsky G , Zhemenik V , Kudryavtsev Yu , Fedosseev V , Bark R , Janas Z 
Published: May 2020

Abstract
A new setup for production and investigation of exotic heavy neutron rich nuclei located in the "north-east" region of nuclear map is under construction at Flerov Laboratory for Nuclear Reactions (FLNR) of JINR, Dubna. The setup will use the available U-400M cyclotron beams for low energy multi-nucleon transfer reactions. Products of 4.5 to 9 MeV per nucleon heavy-ion collisions, such as 136Xe beam on 208Pb target, will be captured in a gas cell, selectively laser-ionized, transported towards mass separator by electrostatic ion guide extraction system and then to detecting system.
Spectroscopy of neutron-rich scandium isotopes
Authors: Koseoglou P. , Werner V. , Pietralla N. , Söderström P.-A. , Doornenbal P. , Obertelli A. , Achouri N. , Baba H. , Browne F. , Calvet D. , Château F. , Chen S. , Chiga N. , Corsi A. , Cortés M. L. , Delbart A. , Gheller J-M. , Giganon A. , Gillibert A. , Hilaire C. , Isobe T. , Kobayashi T. , Kubota Y. , Lapoux V. , Liu H. , Motobayashi T. , Murray I. , Otsu H. , Panin V. , Paul N. , Rodriguez W. , Sakurai H. , Sasano M. , Steppenbeck D. , Stuhl L. , Sun Y. L. , Togano Y. , Uesaka T. , Wimmer K. , Yoneda K. , Aktas O. , Aumann T. , Chung L. X. , Flavigny F. , Franchoo S. , Gasparic I. , Gerst R.-B. , Gibelin J. , Hahn K. I. , Kim D. , Koiwai T. , Kondo Y. , Lee J. , Lehr C. , Lettmann M. , Linh B. D. , Lokotko T. , MacCormick M. , Moschner K. , Nakamura T. , Park S. Y. , Rossi D. , Sahin E. , Sohler D. , Takeuchi S. , Toernqvist H. , Vaquero V. , Wagner V. , Wang S. , Xu X. , Yamada H. , Yan D. , Yang Z. , Yasuda M. , Zanetti L. 
Published: May 2020

Abstract
Within the SEASTAR III campaign at the Radioactive Isotope Beam Factory, at the RIKEN Nishina Center, neutron-rich isotopes in the vicinity of 53K were produced from the fragmentation of the primary 70Zn beam on a 9Be target. After nucleon knockout reactions on the secondary liquid hydrogen MINOS target the known γ rays of the neutron-rich 55Sc isotope were observed (shown in this proceedings) and γ rays from 57,59Sc isotopes have been identified for the first time. The evolution of the occupied nucleon orbitals of these nuclei in the ground and excited state is investigated under the prism of the tensor force.
Elastic scattering of alpha particles from 9Be in the framework of optical model
Authors: Burtebayev N , Janseitov D M , Kerimkulov Zh , Alimov D , Nassurlla M , Valiolda D S , Urazbekov B , Demyanova A S , Starastsin V , Danilov A N 
Published: May 2020

Abstract
The analysis of the available data on the α + 9Be elastic scattering in range from 18.4 to 104 MeV, including recent measurements at energies of 40 and carried out. The experimental data on elastic scattering were analyzed within the of the optical model using Woods-Saxon potential and the double folding one.
226Ra and natural uranium in Bulgarian mineral waters
Authors: Geleva E , Tonev D , Protohristov H , Goutev N. , Salkova E. , Nikolova N. 
Published: May 2020

Abstract
A complex investigation on Bulgarian mineral waters from certain frequently used sources have been carried out. Specific activities of 226Ra and concentration levels of natural uranium in mineral waters samples were analyzed using nuclear and analytical methods.

226Ra is a naturally occurring radioisotope with a period of half live 1 600 years, which specific activity in water was determined through analysis of the daughter 222Rn. The measurements were carried out using a low-level liquid scintillation counting in a Packard Tri-Carb 2770 TR/SL liquid scintillation spectrometer. Uranium concentration was measured in water samples using a luminescent method. In addition to 226Ra and natural uranium, determination of gross alpha and beta activities of waters was made by means of the same liquid scintillation spectrometer. The concentrations values obtained were compared with data reported by other authors in different countries and with reference values accepted for drinking water. The expected annual effective doses for ingestion of natural uranium and 226Ra in the analysed waters were calculated.
Delayed fission of atomic nuclei
Authors: Skobelev N K 
Published: May 2020

Abstract
The history of the discovery of delayed nuclear fission is presented, and the retrospective of investigations into this phenomenon that were performed at various research centers worldwide is outlined. The results obtained by measuring basic delayed-fission features, including the fission probability, the total kinetic energy of fission fragments, and their mass distributions, are analyzed. Recommendations concerning further studies in various regions of nuclear map with the aim of search for atomic nuclei undergoing delayed fission are given. Lines of further research into features of delayed fission with the aim of solving current problems of fission physics are discussed
Water use and electricity-for-water savings trends in three representative U.S. cities
Authors: Chaudron Camille , Gursel Aysegul Petek , Kavvada Ioanna , Horvath Arpad 
Published: May 2020

Abstract
A life-cycle assessment approach is used to analyze the energy demand and greenhouse gas emissions associated with potable water usage trends in three major cities of the United States in different regions and climates and relying on different types of raw water sources. Between 2011 and 2016, a decreasing trend in per-person water consumption is observed despite growing populations. The per-person water consumption decreased by 10% in Tucson (Arizona) and Washington, DC, and by 16% in Denver (Colorado). Leveraging certain distinctive water and electricity supply characteristics of the case study cities can provide insights into potential interventions and cross-comparison for generalizing trends. In Tucson, potable water production is the most energy intensive and electricity is produced mainly from coal. The greenhouse gas emissions of the per-person water consumption in Tucson are about five times higher compared to Denver and Washington, DC, thus water savings in Tucson should be particularly pursued. GHG emissions decreased in the period by even higher percentages than water use: 15%, 14% and 27% between 2011 and 2016 for Tucson, Washington, DC, and Denver, respectively. In 2015, just four years’ worth of forgone GHG emissions in Tucson were somewhat higher than the total GHG emissions associated with water consumption in all of Washington, DC, a city with the same population size as Tucson. Results show that cities should prioritize promotion of water savings to decrease the average per-person water consumption because it can be achieved and can compensate for increases in population. Lower greenhouse gas emissions can be attained in tandem with the local electric power industry.
Attribute analysis with classification algorithm on election participation
Authors: Fitrani A S , Rosid M A , Muharram F , Kodriyah F L 
Published: May 2020

Abstract
Stages of General Elections of the President, DPD, DPR, Provincial DPRD and Regency / City DPRD in Indonesia are determined by institutions namely the General Election Commission (KPU), where there is a measure of success in holding direct, general, and free. Another component of the implementation of elections is that there are contestants and voters. In the voter factor, this is also a measure for success in the overall process of implementation, namely success if high community participation in the administration of elections. However, vice versa, if community participation is low, one of them is the level of public confidence in the organizers (government) decreases. Data mining classification analysis and modification of attributes in prediction classes “Hadir” and “Tidak Hadir” on the final voter list (DPT). The number of datasets is 4249 instances, and the number of attributes is 11. The percentage results are 89.3417% for the Naive Bayes algorithm for prediction classes in the Presidential Election, DPD, DPR, Provincial DPRD and Regency/City DPRD in 2019. Further analysis is done on eliminating some attributes to obtain information, whether it has a significant effect on the results of predictions. And in this analysis, for the ten attributes with the removal of “statusKK” (highest rank gain ratio) for the prediction class, the results are the worst. = After nine attributes, the removal of the “rt” and “tps” attribute (second and third rank) for the prediction class is the best result. There is the highest percentage difference for the prediction class on the classification algorithm for modified and or unmodified status attributes, the results of the percentages and classification algorithms are different.
Problem Solving Strategy for Product Variant Design Combined with Improved Neural Network Method
Authors: Yang L , Gu X Y , Yin Q 
Published: May 2020

Abstract
Aiming at the fast solution of product variant design problem, a solving strategy combined with improved neural network method was proposed. Past similar cases were extracted as training samples through case-based reasoning (CBR) technology, empirical parameters were predicted based on neural network; computational parameters were solved by the existing calculation templates. The design results visualization was realized through parametric design. To reduce the influence of artificial sample construction on neural network training effect, the sample construction strategy of the multiple input/single output (MI/SO) structure was proposed to improve the parameter prediction quality. Finally, the feasibility and effectiveness of the proposed method was demonstrated by taking the design of a single-cylinder recuperator for example.
Output Force Control of a Pneumatic Soft Gripper with a Jointed Endoskeleton Structure
Authors: Wu Zhaoping , Li Xiaoning , Guo Zhonghua 
Published: May 2020

Abstract
Soft grippers are suitable for gripping various objects without damage owing to their high flexibility. But current soft grippers have a general problem of insufficient gripping force. To grip objects with different mass and sizes on assembly line safely and reliably, a novel pneumatic soft gripper with a jointed endoskeleton structure was developed and fabricated successfully. The actuation and force bearing functions of the gripper were separated to increase the gripping force. Moreover, to control the output force of the finger tip of the soft gripper, a fuzzy auto-tuning PID controller was designed and the relevant parameters of the controller were determined. Furthermore, a test platform with the designed fuzzy auto-tuning PID controller was developed to control the output force of the finger tip. The test results showed that the controller was able to maintain the desired target output force with a maximum deviation of 0.6 N. At last, the soft gripper was used to grip material objects for testing. From the experiment, it indicated that the output force of the finger tip can reach up to the desired values accurately and various objects can be gripped safely and reliably.
Non-polar nitride single-photon sources
Authors: Wang Tong , Oliver Rachel A , Taylor Robert A 
Published: May 2020

Abstract
Non-polar nitride single-photon sources are developed in order to minimise the undesired side effects caused by the internal fields of polar nitrides, while retaining the benefits of high-temperature single-photon generation from a semiconductor quantum dot platform. As a relatively newer single-photon source, several reports have already been made highlighting their interesting optical and photophysical properties. These include an average ultrafast radiative exciton recombination lifetime of <200 ps, an average slow-timescale spectral diffusion of <40 μeV, polarisation-controlled single-photon generation up to 220 K, and temperature-dependent fine-structure splitting. In this review, the photophysics, improvement of optical properties, and future of non-polar nitride single-photon sources will be closely examined based on current reports in the literature.
Network-based ranking in social systems: three challenges
Authors: Mariani Manuel S , Lü Linyuan 
Published: May 2020

Abstract
Ranking algorithms are pervasive in our increasingly digitized societies, with important real-world applications including recommender systems, search engines, and influencer marketing practices. From a network science perspective, network-based ranking algorithms solve fundamental problems related to the identification of vital nodes for the stability and dynamics of a complex system. Despite the ubiquitous and successful applications of these algorithms, we argue that our understanding of their performance and their applications to real-world problems face three fundamental challenges: (1) rankings might be biased by various factors; (2) their effectiveness might be limited to specific problems; and (3) agents’ decisions driven by rankings might result in potentially vicious feedback mechanisms and unhealthy systemic consequences. Methods rooted in network science and agent-based modeling can help us to understand and overcome these challenges.