bluuebunny/crossref_metadata_2025 huggingface dataset:
Utilization of fatty acids from the edible oil industry in synthesis of 2-hydroxy propyl palmitate as a bioaditive solar fuel
Authors: Burhan R Y P , Zetra Y , Pusparatu  , Suprapto  , Hidayat A T
Published: May 2020

The sulphur content in diesel oil must be less than 0.5% by weight of diesel oil, because the high sulphur content will accelerate the occurrence of wear and tear on the engine cylinder walls. For this reason, desulphurization is carried out to reduce sulphur content in diesel oil. The process of desulphurisation of diesel oil causes a decrease in the lubricating power of diesel oil to the engine so that the addition of additives is needed. In this research, bioaditive substances in the form of 2-hydroxy propyl palmitate have been synthesized from the cooking oil industry fatty acids. The reaction begins with esterification of palmitic acid with BF3 / methanol to produce a methyl palmitate ester with a yield of 72.13%. Furthermore, methyl palmitate ester was esterified using propylene glycol and K2CO3 as a base to produce 2-hydroxy propyl palmitate which acts as a bioaditive with a yield of 52.90%. Structure identification is done by Gas Chromatography-Mass Spectroscopy (GC-MS) method.
Usability analysis of disaster information systems using usability testing
Authors: Purnomo T A , Widyanto R A , Setiawan A , Hendradi P , Suksmasetya P
Published: May 2020

The Central Java region is the highest disaster-prone region in Indonesia in the period January - May 2019. The disasters occurred, in total of 554 times, with a total of 14 fatalities, 7 injured, 98,208 affected and displaced. Natural disasters cannot be avoided, but their impact can be minimized with good management. Disaster management and anticipation include utilizing information systems. A good information system is a system that makes it easy for users. The level of usefulness of this system, must be measured whether this system will be useful or not. This research is focused on testing the interface of the Disaster Information System belongs to BNPB Magelang. The method used is Planning and Analysis, Usability Evaluation, Data Analysis and Data Presentation. This measurement is done by the usability testing method. Based on the measurement results of the usability level of the Disaster Information System, a value of 3.35 was obtained. Based on the Linkert Scale, this system is said to be Usable. The results of the research can describe the reusability level of disaster information systems and to recommend in improving aspects of reusability.
Evaluation of wakafMu fundraising platform using HOT-FIT method
Authors: Artha E U , Medias F , Pambuko Z B
Published: May 2020

Muhammadiyah as one of the social organizations engaged in religious, social, education and health has a very strategic and important role in society. One of the assets managed by Muhammadiyah is waqf, the existence of waqf has become very strategic because besides being an Islamic philanthropic institution, waqf also plays an important role in providing endowment for the ummah. Waqf which is managed by Muhammadiyah Regional Leadership (PDM) of Magelang also has constraints that cause the power of the role of waqf to be limited. One of them is majority of waqf is consumptive and in the form of land with minimal financial resources in its development. The main problem is the lack of the fundraising of endowment funds. Currently only fundraising information system models have been made but it has not been investigated whether this information system can obtain economic value so that productivity can be increased in the management of waqf assets. The method used in this research is to use the HOT-FIT method which aims to see the relationship between human, organization and technology of the Net Benefit from the application of waqf fundraising information systems obtained from quantitative data collection in PDM Magelang.
Experiment electrical motorcycle used solar energy with wireless transfer energy method for transportation in isolated regions
Authors: Widjanarka W , Sutiyatno S
Published: May 2020

Researchers usually create Wireless Transfer Energy (WET) using FET (Field Effect Transistor) transistor for different fields. FET-MOSFET has several advantages including its ability to reach quite long distance and LED load. This present research was conducted using bipolar power TC 5200 transistor. Transistor was utilized for its short distance of 2-5 cm but has quite big power. The background of this research, initially, is wireless electrical energy transfer through air, something that seems impossible. Researchers have attempted to discover several innovations several innovative methods to solve the issue. This research aims to create WET, a wireless electrical energy transfer, a process in which electricity is transmitted from one place to another place, with long distance, without wires connecting. The media connecting are through magnetic induction. This research is an experiment of Wireless Energy Transfer which is applied in an electrical motorcycle. This research used experiment method. The principle of inverter was tested on a basic circuit. The power supply utilized solar cell with 10-Watt, 20 Watt, and 50-Watt capacities and 12 Volts of voltage. This research generated 240 milliampere output.
Decision strategy for landslide event based on 4 parameters
Authors: Herlambang P , Suharjono A , Mukhlisin M
Published: May 2020

Landslides are typically caused by heavy rain in some locations that have a certain slope of land compounded by deforestation or earthquakes. For instance, in 2018 there were 148 reported landslides in the Banjarnegara highlands, Indonesia. By using that fact, some research has been done. The research is about the indicator parameters of landslides by combining rain gauge sensors, soil moisture sensors, ground shift sensors and groundwater pressure sensors using Arduino Promini. The data from sensor is sent through LoRa Bee to the database server using NodeMCU ESP8266 which is connected to the Internet in real-time through access points. The data that has been sent to the server will be processed and displayed on the website. In this paper, the author devises an algorithm for analysing the data from each sensor to a decision-making strategy. The decision-making method for an early warning of landslides uses a decision tree that compares the measured parameters with a predetermined threshold of each sensor. After analysis and testing, this system is expected to provide early warning of the landslides quickly and accurately.
Performance and soot emissions from direct injection diesel engine fueled by diesel-jatropha-butanol-blended diesel fuel
Authors: Syarifudin  , Syaiful
Published: May 2020

Jatropha renewable energy is widely used as diesel engine fuel due to the improving dependence on fossil diesel fuel and the volume of motor vehicles. Jatropha was chosen because it is non-edible energy and it is easily produced. However, high viscosity and low heating value become performance and emissions of diesel engine problems. Butanol is a low viscosity alcohol group and it contains oxygen in high volume. The addition of butanol is proven to improve performance and to reduce diesel engine emissions. This research observed the performance and soot emissions of a 4JB1 direct injection diesel engine fueled with a blended of diesel-jatropha-butanol fuel. The test was operated at 2500 rpm with a loading rate of 0 to 100% at an interval of 25%. The volume of the biodiesel mixture are 85/10/5, 80/10/10, 75/10/15, 75/20/5, 70/20/10, 65/20/15, 65/30/5, 60/30/10, 55/30/15 based on volume. Test result showed the use of fuel with jatropha which is contains 10% and 15% butanol having results in a higher performance increase and lower smoke opacity than the pure diesel fuel.
Anti-forensics: the image asymmetry key and single layer perceptron for digital data security
Authors: Mualfah D , Fatma Y , Ramadhan R A
Published: May 2020

Accessing or theft of public network information is very vulnerable to data transmission on public networks, this has an impact on the loss of those who have the information. In the digital forensic world, securing data is a technique for anti-forensic that aims to keep data safe. One way to secure information when sending is done is to encrypt the data and information. Encryption techniques play an important role in cryptography to hide text or messages into an image as a public key. The use of images as key objects is very effective for data security and the information cannot be read or unknown by unauthorized persons. In this case the asymmetric key cryptographic technique uses images and the single layer perceptron, asymmetric cryptography through the encryption and description process can produce data and information security keys that are difficult to guess. The use of keys is done by extracting image features using the GLCM (grey level co-occurrence matrix) to produce random symbols perfectly through the training process using a single layer perceptron encryption asymmetry key and description that can be accounted for integrity.
Markov Stability Analysis and Community Structure in Social Networks
Authors: Nikaj K , Ifti M
Published: May 2020

Individuals connected to realistic networks exhibit collective behavior. In order to characterize this phenomenon and explore the correlation between collective behaviors and locally interacting elements, we use statistical methods and visualization software as a combined approach to understand the behavior of the network for a given behavior of the agents that we use to recreate our network. The aim of this work is to identify the communities as hierarchical structures trying to find them between a giant component and a small-world network. By analyzing the data and describing how these networks fall in community structure, we aim to obtain new tools and methodology which will help us to describe how networks grow and fall apart in smaller structures, which have similar features with the large network, but different dynamics.
Preliminary design of the MAORY Calibration Unit
Authors: Antonio I Di , Rico G Di , Dolci M
Published: May 2020

MAORY (Multi-conjugate Adaptive Optics RelaY) is one of the first light instruments for the ESO Extremely Large Telescope (ELT). It will be firstly used by MICADO (Multi-AO Imaging CamerA for Deep Observations), a near-infrared high-angular resolution imager, to compensate aberrations and provide high-Strehl images within a (53” × 53”) Field of View (FoV). The complexity of MAORY requires calibration functionalities for both the AIV (Assembly-Integration-Verification) and the operational phase. The function of the Calibration Unit (CU) is keeping the high efficiency of the adaptive correction provided by MAORY during the operational phase, through proper calibration sources, acting as both Natural Guide Stars (NGS) and Laser Guide Stars (LGS) sources. An overview of the system, the status of the current design and the main challenges to face in the future are presented in this work.
Inflationary gravitational waves and exotic pre Big Bang Nucleosynthesis cosmology
Authors: Marco A Di , Gasperis G De , Pradisi G , Cabella P
Published: May 2020

According to the most popular scenario, the early Universe should have experienced an accelerated expansion phase, called Cosmological Inflation, after which the standard Big Bang Cosmology would have taken place giving rise to the radiation-dominated epoch. However, the details of the inflationary scenario are far to be completely understood. Thus, in this paper we study if possible additional (exotic) cosmological phases could delay the beginning of the standard Big Bang history and alter some theoretical predictions related to the inflationary cosmological perturbations, like, for instance, the order of magnitude of the tensor-to-scalar ratio r.

A post-publication change was made to this article on 4 Jun 2020 to correct the title on the webpage.
Characterisation of flare Soft X-ray distribution with solar magnetic activity
Authors: Foldes R , Berrilli F
Published: May 2020

We analyse the 0.1 — 0.8 nm solar soft X-ray flux catalogue from Geostationary Operational Environmental Satellites (GOES), managed by NASA/NOAA, between September 1978 and September 2017, in order to investigate the possible role of solar activity and solar cycle epoch on the distribution of soft X-ray peak fluxes. We concentrate our attention on the last three solar cycles because solar activity proxies seem to indicate a decrease in the magnetic activity of our star. We know that flare soft X-ray peak fluxes are characterised by a power-law distribution with an indexα≃ 2 that shows a minor dependence on solar cycle. More in detail, we study the dependence of the power-law parameters during each single solar cycle (cycles 21-24) and during different regimes of solar activity defined using three different proxies:i) Sunspot Number (SSN),ii) Mg II core-to-wing ratio (Mg II Index), andiii) solar radio flux at 10.7 cm or 2800 MHz (F10.7). The power-law estimation analysis is performed in maximum likelihood estimation (MLE) fitting method with goodness-of-fit based on Kolmogorv- Smirnov test. Preliminary results indicate that the power-law index shows a slight decrease as solar activity decreases. This except for the F10.7 proxy. More in-depth statistical analysis is necessary to confirm our findings.

A post-publication change was made to this article on 22 Jun 2020 to correct the webpage title to match the pdf.
Proxima Centauri b: infrared detectability in presence of stellar activity
Authors: Galuzzo D , Berrilli F , Giovannelli L
Published: May 2020

We propose a general method to detect and characterize tidally-locked exoplanets in 1:1 spin/orbit resonance using the information coming from different infrared bands, analyzing the variation in time of the color of exoplanetary systems. We focus on the effects induced on the detectability of the system by the starspots of the active host-stars. The analysis is conducted on the Proxima Centauri system as a case study, comparing the results from a more complex 3D General Circulation Model simulation with a simple toy model. Our toy model includes the black-body emission in the infrared of the host-star, day-side and night-side of the tidally locked planet, as well as the starspots. The results are consistent with the 3D General Circulation Model and suggests that it is possible to disentangle the stellar activity effects from the presence of the planet in the exoplanetary system using the infrared color-color diagram technique.
Frequency-dependent squeezing generation with EPR entanglement
Authors: Garaventa B , Bawaj M , Laurentis M De , Pace S Di , Angelo B D’ , Khan I , Naticchioni L , Nguyen C , Sequino V , Sorrentino F , Zendri J P
Published: May 2020

The sensitivity of gravitational wave interferometric detectors is ultimately limited by the quantum noise, which arises from the quantum nature of light and it is driven by vacuum fluctuations of the optical field entering from the dark port of the interferometer. One way to improve the sensitivity of gravitational wave interferometers is to inject squeezed vacuum into the dark port. This has been already demonstrated for the main gravitational wave detectors (GEO, Advanced LIGO and Advanced VIRGO). We are studying tricks to produce a “frequency- dependent squeezing”: a standard method is to filter the squeezed optical field with one or more optical cavities (300 m long cavities). An alternative method using a pair of squeezed EPR (Einstein-Podolsky-Rosen) entangled beams to produce frequency-dependent squeezing by a non-degenerate OPO (Optical Parametric Oscillator) will be discussed in this paper. This method promises to achieve a frequency-dependent optimization of the injected squeezed light fields without the need for an external filter cavity.
Deep neural networks for analysis of Mercury’s planetary exosphere
Authors: Kazakov A N , Lazzarotto F , Orsini S , Milillo A , Mangano V , Angelis E De , Ivanovski S , Massetti S , Mura A , Rispoli R , Vertolli N , Aronica A
Published: May 2020

The emergence of Artificial Intelligence’s Deep Neural Networks (DNNs) as a method for analysis of spatial and temporal data gives us a new avenue for research of the processes inherent to planetary exospheres and their interaction with the planetary environment. Hereby, it will be presented a particular study on how in-situ observations of the elemental composition of Mercury’s exosphere may serve as an indication of the surface regolith mineral composition below, through predictions given by pre-trained DNNs. In this case the main driver, considered to generate the exosphere, is the micrometeoroid impact vaporization (MIV), which is seen as the dominant process in the night-side hemisphere of the planet. The training datasets will be constructed from randomly generated virtual surfaces, which will aim to generalize the training of the AI models to various types and compositions of the regolith. Different Neural Network models, which include fully-connected networks and Convolutional Neural Networks, will be compared both in giving supervised classification through multivariate regression predictions, and in reconstructing the regolith mineralogy maps. Furthermore, ways to expand the Deep Neural Networks to pattern recognition and knowledge discovery will be explored beyond the surface-exosphere interaction, as well as the possibilities for transfer learning and online learning with the acquisition of real planetary data. The development of such data analysis algorithms will be shown especially in view of the upcoming arrival of the ESA/JAXA’s BepiColombo mission to Mercury, the innermost planet, in 2025, with its variety of instruments able to capture the dynamics of the tenuous Hermean environment. Ultimately, would be targeted the implementation of such AI algorithms within the Ground Segment pipeline software architecture of the experiment BepiColombo/MPO/SERENA, composed by four ion and neutral particle detectors.
TECNOMUSE: a novel, RPC-based, muon tomography scanner for the control of container terminals
Authors: Preziosi E , Arcieri F , Caltabiano A , Camarri P , Casagrande S , Cavicchioni D , Danza F A , Fabrizi E , Fabrizi M , Festa G , Fornaro C , Marchese F , Merella D , Morone M C , Picella P , Picozza P , Pizzimento L , Rocchi A , Santonico R , Senesi R , Sparvoli R , Todesco G M , Cianchi A
Published: May 2020

Every year, 700 million twenty-foot (container) equivalent units pass through the container terminals of the harbours all over the world. Only a small percentage (34%) are scanned to inspect the presence of radioactive materials. The need for controls is hampered essentially by three factors: the amount of both time and personnel necessary to control each container and the use of scanning methods based on systems potentially harmful for the personnel itself. Muon tomography can become a strategy for fast and reliable inspection of containers without using ionizing radiation. This technology takes advantage of multiple Coulomb scattering of the muons (particle produced by cosmic rays) through media to understand the composition and the geometry of the scanned volume. The TECNOMUSE project has the purpose to realize a muon tomography scanner based on a novel geometry and, for the first time, using Resistive Plate Chambers detectors. In this work, the preliminary results from the TECNOMUSE scanner are evaluated via Monte Carlo simulations. Many different simulations have been made with the aim to assess the detection capabilities of the device, its spatial resolution and the time required to reconstruct and distinguish different materials.
Cyclotron solid targets preparation for medical radionuclides production in the framework of LARAMED project
Authors: Skliarova H , Cisternino S , Cicoria G , Cazzola E , Gorgoni G , Marengo M , Esposito J
Published: May 2020

LARAMED project aims to set up an advanced science and technology facility to develop new and efficient methods to produce medical radioisotopes at Legnaro National laboratories of National Institute of Nuclear Physics. Waiting for the facility full operation, LARAMED group has already started working on the cyclotron production of several conventional and emerging radionuclides. Suitable target preparation is one of the most critical aspects in cyclotron production of radioisotopes. LARAMED group has investigated a set of non-classical techniques for metallic target preparation. Magnetron sputtering technique developed for ultra-thick film deposition was applied for the preparation of the Mo solid targets for 99mTc production, and Y ones for 89Zr production. Spark plasma sintering method provides efficient sintering of powders and good bonding of metallic pellet to a backing. Like magnetron sputtering, it was tested for natl00Mo and natY targets, as well as for natCr targets preparation aimed at 52Mn production. The High energy Vibration Powders Plating technique was instead applied for natural (Mo, Ti) and enriched 48Ti metallic powders with >95% deposition efficiency. All three techniques tested provided the cyclotron solid targets with high thermomechanical performance under the beam (IkW/cm2).
Stretchable conductors made of single wall carbon nanotubes self-grafted on polymer films
Authors: Fazi L , Prioriello A , Scacco V , Ciccognani W , Serra E , Mirabile Gattia D , Morales P , Limiti E , Senesi R
Published: May 2020

Aiming at the accomplishment of stretchable and elastic conductive devices, we report in this work electrical, mechanical and thermal characterization of a composite conductive material obtained by self-grafting of single wall carbon nanotubes bundles on different polymeric films. The dependence of resistance of micrometric composite conductors on the applied strain was measured; the current breakdown threshold was also measured together with the corresponding temperature increase. Finally, the dependence of an AC signal attenuation for a bi-layer single wall carbon nanotubes conductor sandwiching a 25 μm thick poly-ethylene film was obtained as a function of the signal frequency, and the experimental results were satisfactorily compared to a simple RLC model.
Non-Hermitian topological phases in an extended Kitaev model
Authors: Maiellaro A , Citro R
Published: May 2020

In this work we address the study of topological phase protection of open quantum systems. Using the self-energy formalism, we investigate the paradigmatic case of an extended Kitaev model. The results show how the topological order can be affected by coupling the system to two external leads, giving rise to Non-Hermitian topological phases. Our results could be useful in spectroscopic measurements made on nanowire-based mesoscopic devices.
Critical aspects in the measure of the quench propagation velocities on HTS tapes
Authors: Agostino D D’ , Gambardella U , Iannone G , Saggese A
Published: May 2020

This paper concerns the investigation of the quench propagation phenomena in High Temperature Superconducting HTS tapes. In particular the determination of the Normal Zone Propagation Velocity NZPV, is based on the measure of the time propagation of the normal zone by reading the rising voltages detected by voltage taps placed at known distances. Several experimental aspects related to the measured times and voltages with their dependencies on temperature have to be considered. In particular, the rise up of the temperature determines a time limit that has to be considered to avoid the damage of the tape. Based on our measures of NZPV and in agreement with the results of a numerical model developed for our experimental environment, it is shown that the time limit of the measures is set by the value of the bias current. The tape length traveled by the normal zone front wave is related to this measure time and depends on the value of the NZPV that have to be measured. Adopting a simplified approach, it is possible to forecast the values of the tape length that may be used for the NZPV measurements and how its value may change as a function of the bias current.
Chemometrics tools for Advanced Spectroscopic Analyses
Authors: Scatigno C , Senesi R , Festa G , Andreani C
Published: May 2020

Any system is described by several variables, often in the form of hidden information, able to describe and explain functional mechanisms for the majority of the processes which can be evaluated analytically only when we consider entire complex datasets. The relationship between those variables is the key to identify and quantify correlations among the parameters describing the data in a strictly model-free manner. In chemometrics one uses mathematical and statistical methods to improve the understanding of chemical information through the correlation of physical parameters or properties to analytical instrument data. This approach is currently used across chemistry, materials science, biology, with a growing impact is the field of spectroscopy. This paper presents the ability of chemometric technique applied to Advanced Spectroscopic Analyses, examples include spectroscopic data collected from both the High- resolution neutron Spectrometer TOSCA, operating at the ISIS pulsed Neutron and Muon Source (UK) and X-ray fluorescence (XRF) spectroscopy. This work demonstrates the high-resolution of the Principal Component Analysis (PCA) to a spectroscopic data-set dealing with the determination of marker bands from Inelastic Neutron Scattering (INS) spectra of a large data- set, the presence of a probably additional transition phase of one globular molecule and evidencing the metallic nature of the black/brownish inscriptions on daily-use textiles used in ancient Egypt. This study will pave the way for the analysis of multi-parametric, high-throughput INS data, now within reach using state-of-the-art chemical neutron spectrometers such as VESPA.
Measurement of Cosmic Deuteron Flux with the AMS-02 Detector
Authors: Dimiccoli F , Battiston R , Kanishchev K , Nozzoli F , Zuccon P
Published: May 2020

The deuteron flux in cosmic rays is one of the most valuable tools for understanding the propagation of CR in the galaxy and constrain the models that describe it. In this work, a new preliminary measurement of D flux is presented, obtained from the data of the AMS-02 experiment.
Perspectives of dark matter indirect search with ADHD in space
Authors: Nozzoli F , Dimiccoli F , Zuccon P
Published: May 2020

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

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

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.
Complex configurations and nuclear structure problems
Authors: Voronov Victor
Published: May 2020

Starting from the quasi particle random phase approximation based on an effective Skyrme interaction, we study the effects of phonon-phonon coupling (PPC) on the low-lying and high-lying collective nuclear states. Many examples of such effects are presented. It is shown that to reproduce experimental data one needs to take into account PPC in many cases.
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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.