bluuebunny/crossref_metadata_2025_split huggingface dataset:
Observation of the dynamics of an ergodic quantum protocol in a photonic realization
Authors: Qu Dengke , Kálmán Orsolya , Zhu Gaoyan , Xiao Lei , Wang Kunkun , Kiss Tamás , Xue Peng 
Published: July 2021

Abstract
Iterated quantum protocols with measurement-based selection lead to deterministic chaos for the evolving pure state representing an ensemble of qubits. Deterministic chaos for the pure quantum state may lead to ergodic evolution in the sense that initial states from any small area on the Bloch sphere will cover the whole sphere after a finite number of iterations. We realize two steps of an ergodic protocol in a photonic experiment, where initial qubit states are encoded in the polarization and path degrees of freedom of down-converted photons stemming from a parametric process. We numerically analyze the effect of noise on the time evolution and show that the protocol, described by a Lattès map, remains quasi-ergodic for any initial state if the initial noise is small. Tomographic reconstruction of the quantum states throughout the evolution is consistent with simulations and thus demonstrates ergodicity of the quantum dynamics.
ECLIPSE: a fast Quadratic Maximum Likelihood estimator for CMB intensity and polarization power spectra
Authors: Bilbao-Ahedo J.D. , Barreiro R.B. , Vielva P. , Martínez-González E. , Herranz D. 
Published: July 2021

Abstract
We present ECLIPSE (Efficient Cmb poLarization and Intensity Power Spectra Estimator), an optimized implementation of the Quadratic Maximum Likelihood (QML) method for the estimation of the power spectra of the Cosmic Microwave Background (CMB). This approach allows one to reduce significantly the computational costs associated to this technique, allowing to estimate the power spectra up to higher multipoles than previous implementations. In particular, for a resolution of N
side = 64, ℓmax = 192 and a typical Galactic mask, the number of operations can be reduced by approximately a factor of 1000 in a full analysis including intensity and polarization with respect to an efficient direct implementation of the method. In addition, if one is interested in studying only polarization, it is possible to obtain the power spectra of the E and B modes with a further reduction of computational resources without degrading the results. We also show that for experiments observing a small fraction of the sky, the Fisher matrix becomes singular and, in this case, the standard QML can not be applied. To solve this problem, we have developed a binned version of the method that is unbiased and of minimum variance. We also test the robustness of the QML estimator when the assumed fiducial model differs from that of the sky and show the performance of an iterative approach. Finally, we present a comparison of the results obtained by QML and a pseudo-C
ℓ estimator (NaMaster) for a next-generation satellite, showing that, as expected, QML produces significantly smaller errors at low multipoles. The ECLIPSE fast QML code developed in this work will be made publicly available.
Preliminary results on the quality control of blood irradiators using an alanine/electron paramagnetic resonance dosimeter
Authors: Kim H.J. , Lee D.Y. , Kye Y.U. , Kim J.K. , Jo W.S. , Kang Y.-R. 
Published: July 2021

Abstract
Approximately 48 medical institutions in South Korea own and
use blood irradiators; however, the quality control of blood
irradiators is insufficient. This study was conducted to establish
quality control procedures for blood irradiators using an alanine
dosimeter and to ensure reliability of dosimetry. For dosimetry
using alanine dosimeters, measurements were performed using an
alanine dosimeter jig developed in this study to ensure dose
delivery system reliability. Furthermore, the dose and dose
distribution were verified, and the uncertainty was evaluated.
Calibration of nuclear recoils at the 100 eV scale using neutron capture
Authors: Thulliez L. , Lhuillier D. , Cappella F. , Casali N. , Cerulli R. , Chalil A. , Chebboubi A. , Dumonteil E. , Erhart A. , Giuliani A. , Gunsing F. , Jericha E. , Kaznacheeva M. , Kinast A. , Langenkämper A. , Lasserre T. , Letourneau A. , Litaize O. , de Marcillac P. , Marnieros S. , Materna T. , Mauri B. , Mazzucato E. , Nones C. , Ortmann T. , Pattavina L. , Poda D.V. , Rogly R. , Schermer N. , Serot O. , Soum G. , Stodolsky L. , Strauss R. , Vignati M. , Vivier M. , Wagner V. , Wex A. 
Published: July 2021

Abstract
The development of low-threshold detectors for the study of
coherent elastic neutrino-nucleus scattering and for the search for
light dark matter necessitates methods of low-energy calibration. We
suggest this can be provided by the nuclear recoils resulting from
the γ emission following thermal neutron capture. In
particular, several MeV-scale single-γ transitions induce
well-defined nuclear recoil peaks in the 100 eV range. Using the
FIFRELIN code, complete schemes of γ-cascades for various
isotopes can be predicted with high accuracy to determine the
continuous background of nuclear recoils below the calibration
peaks. We present a comprehensive experimental concept for the
calibration of CaWO4 and Ge cryogenic detectors at a research
reactor. For CaWO4 the simulations show that two nuclear recoil
peaks at 112.5 eV and 160.3 eV should be visible above background
simply in the spectrum of the cryogenic detector. Then we discuss
how the additional tagging for the associated γ increases the
sensitivity of the method and extends its application to a wider
energy range and to Ge cryogenic detectors.
Radiation-induced effects in glass windows for optical readout GEM-based detectors
Authors: Maia Oliveira A. , Braccini S. , Casolaro P. , Heracleous N. , Leidner J. , Mateu I. , Murtas F. , Silari M. 
Published: July 2021

Abstract
In this paper we present irradiation measurements performed to select a transparent anode substrate that best meets the requirements of an optical readout for a novel detector, the LaGEMPix. The modification of the optical properties of the material due to proton irradiation were studied in soda-lime, fused quartz and fused silica glasses coated with an Indium Tin Oxide layer. The irradiations were performed using the research Beam Transfer Line (BTL) of the IBA Cyclone 18 MeV cyclotron of the Bern University Hospital (Inselspital). We recorded visible scintillation light generated by proton irradiation in the soda-lime and fused quartz samples. We also investigated the darkening of these three glasses and observed radiation-induced colour centres in the soda-lime glass sample. The optical transmission spectra of the samples were measured before and after irradiation. Reductions of 45%, 1% and 0.4% were observed for soda-lime glass, fused quartz and fused silica, respectively (with an associated error of 0.25%). We conclude that the best option for our specific application is the fused silica substrate, which will be the transparent anode for the next generation of the LaGEMPix detector.
Emerging threats from deforestation and forest fragmentation in the Wallacea centre of endemism
Authors: Voigt Maria , Supriatna Jatna , Deere Nicolas J , Kastanya Agustinus , Mitchell Simon L , Rosa Isabel M D , Santika Truly , Siregar Rondang , Tasirin Johny S , Widyanto Adi , Winarni Nurul L , Zakaria Zuliyanto , Mumbunan Sonny , Davies Zoe G , Struebig Matthew J 
Published: July 2021

Abstract
The Wallacea biogeographic region of Sulawesi, the Moluccas and Lesser Sunda is globally renowned for exceptional endemism, but is currently emerging as a development frontier in Indonesia. We assessed patterns and drivers of forest loss and fragmentation across the region, and used dynamic deforestation models to project future deforestation to 2053. Up to 10 231 km2 was deforested between 2000 and 2018, and a further 49 570 km2 is expected to be lost by 2053, with annual deforestation rates ranging between 0.09% and 2.17% in different sub-regions (average: 1.23%). Key biodiversity areas (priority sites for endemic and threatened biodiversity) are particularly vulnerable to deforestation if they are small, coastal and unprotected. Sub-regional variation in deforestation patterns and drivers must be acknowledged if conservation interventions are to be targeted and effective. We provide a valuable baseline from which to monitor Wallacea’s new development course, as Indonesia undergoes profound policy changes that will provide both challenges and opportunities for environmental governance and conservation.
Empirical estimation of weather-driven yield shocks using biophysical characteristics for U.S. rainfed and irrigated maize, soybeans, and winter wheat
Authors: Snyder Abigail , Waldhoff Stephanie , Ollenberger Mary , Zhang Ying 
Published: July 2021

Abstract
Agricultural yields are highly susceptible to changes in weather system patterns, including annual and sub-annual changes in temperature and precipitation. The impacts of future meteorological variable changes on crop yields have been widely studied in both empirical and process-based models. These changes in future yields can be used in economic models to adjust future crop yields or production functions to reflect the effects of changing weather conditions. This work presents an econometric approach that combines historical weather data with the biophysical growth cycles of maize, winter wheat, and soybean to predict the year-to-year weather-driven yield shocks for rainfed crops. Temperature and modeled soil moisture are taken as predictors, allowing testing of the fitted rainfed model’s ability to predict shocks to irrigated yields by assuming irrigation produces the yield-maximizing level of soil moisture. This approach enables prediction of the potential impacts of changing weather patterns on irrigated crops in areas that are currently primarily rainfed. We present the results of the empirical model, fitted with rainfed data; out-of-sample validation on irrigated crops; and projections of yield shocks under multiple future climate scenarios. Under a bias-corrected GFDL RCP8.5 scenario, this approach predicts the average of annual weather-induced yield shocks, relative to the average of 2006–2020 annual yield shocks, across U.S. counties in the 2040–2060 period of −17% and −13% for rainfed and irrigated maize, −19% and −18% for rainfed and irrigated soybean, and −4% and −2% for rainfed and irrigated winter wheat. Predicted changes in the 2070–2090 period are −30% and −29% for rainfed and irrigated maize, −33% for both rainfed and irrigated soybean, and −7% and −5%for rainfed and irrigated winter wheat. The annual yield shocks presented here will enable modeling of the economic consequences of extreme weather events and potential for irrigation to mitigate such events.
Construction of Forecast Model for Power Demand and PV Power Generation Using Tensor Product Spline Function
Authors: Matsumoto T , Yamada Y 
Published: July 2021

Abstract
Forecasting power demand and photovoltaic (PV) power generation is indispensable for the economic operation of electric utility businesses. Herein, robust demand and PV power forecast models are proposed that enable electricity companies including new entrants to efficiently forecast from small sample size data by using only published weather forecasts. We further enhance the previously proposed forecast models by using the tensor product spline function to impose smoothing conditions, not only in the seasonal direction but also in the hour direction, thereby constructing effective models that can incorporate multiple explanatory variables. The empirical results of the estimated two-dimensional trends are consistent with the intuitive interpretation, and the validations of the out-of-sample forecast error obtained from the data of nine different areas ensure the high robustness of the proposed model.
Electric Power Generation Modeling for an Experimental Biomimetic Turbine with Permanent Magnets in Places with Low Water Flow in the Mantaro Valley - Perú
Authors: Camayo K J , Quispe C , Moggiano N 
Published: July 2021

AbstractThe paper presents a methodology for the design of propeller and generator of a biomimetic hydraulic turbine, as well as an estimate of the electrical power generated for places with low-flow water inflows in the Mantaro Valley, Junín - Perú. The objective was to model the power generated by the biomimetic turbine when it is installed in irrigation channels of 0.8 x 0.8 m2, as a proposal for a micro-hydroelectric plant, an alternative generation with renewable energy, where the flow is at least 4 m3/s. For the verification of the design, a simulator of real conditions such as Computational Fluid Dynamics was used to predict the capacity the amount of force that acts on the movement axis based on the Finite Element Method, to verify the structural unity of the design. The design methodology is based on biomimetic technology, continuity equations, Reynolds Averaged Navier-Stokes Equations, equations applied to determine power, through computational simulation of the turbine, obtaining data such as shaft speed and torque, through the percentage of pressure that exists in each hood, the power generated in the entire system was determined, by means of mathematical modeling a permanent magnet generator was developed as an alternative generator for this type of turbine.
Analytical Output of Smart Piezoelectric Cantilever Beam
Authors: Fang Yongfeng , Wen Lianghua , Tee Kong Fah , Cheng Zhengwei , Yong Xu 
Published: July 2021

Abstract
The smart piezoelectric cantilever beam (PSCB) is often used to make the self-powered vibration sensor. The structure of PSCB is studied. The equation of the output voltage of the PSCB under the vibration condition is established and the output voltage of the PSCB is analyzed. It has been found that the output voltage of the PSCB has a positive proportional relationship with its right end displacement. The output voltage is related with piezoelectric fiber material, electrode layer and their thickness, width and length.
Effect of Activation Methods on the Supercapacitor Performance of Hydrochar Derived from Oil Palm Empty Fruit Bunch
Authors: Ketwong Tulakarn , Doong Ruey-An , Areeprasert Chinnathan 
Published: July 2021

Abstract
In this study, the activated carbon (AC) derived from oil-palm empty fruit bunches (EFB) for using in effective supercapacitor application was carried out by two main steps namely hydrothermal carbonization and activation with three different activated agents steam, carbon dioxide and potassium hydroxide for increase of the AC’s specific area. The fabricated AC had surface area of 246.9 – 809.7 m2/g which were extremely higher as compared to the non-activated carbon i.e., 1.1 m2/g. It is concluded that the chemically AC afforded the best material and showed the high specific capacitance of 101.1 F/g at the scan rate of 5 mV/s with 1 M Na2SO4 as neutral electrolyte over the three-electrode cell. The study revealed that EFB could be considered as a promising potential electrode for supercapacitor.
Kapok-cotton Carbon Sponges for Oil Recovery
Authors: Datiles Wayne Christian P , Herrera Marvin U , Manalo Ronniel D , Maguyon-Detras Monet Concepcion , Futalan Cybelle Concepcion M , Balela Mary Donnabelle L 
Published: July 2021

Abstract
Carbonized natural fibers show great promise as sorbents because of their low fabrication costs, high surface area, high sorption capacity, and improved oil selectivity. Pyrolysis was performed on cotton and kapok fiber blends to produce carbon fiber sorbents. The carbon sponges showed improved mechanical properties with the addition of cotton. Pure carbonized kapok fibers were quite brittle, leading to challenges in recovery after use. The static water contact angle of carbonized kapok fibers, carbonized kapok-cotton blend (50K50C), and carbonized cotton fibers were determined to be 137.0°, 135.0°, and 135.9° respectively. This was an observed improvement from 127.9° for raw kapok and 0° for raw cotton. Sorption experiments revealed that the 50K50C fibers have sorption capacities about 25-27 times its original weight at 27.77 g/g, 25.72 g/g, and 26.01 g/g for motor oil, palm oil, and diesel, respectively.
Analysis and Forecast of the Social Sphere Development in the Arctic Regions of the Russian Federation within the Framework of Industry 4.0 Exemplified by Murmansk Region
Authors: Antipov S K , Kikkas K N , Bobodzhanova L K , Krasnozhenova E E 
Published: July 2021

Abstract
The given article considers the main strategies of the social attractiveness of the Russian Federation Arctic Zone in the context of Industry 4.0 concept presented on the example of the Murmansk region. The research is devoted to the main factors affecting the public interest in the region development as well as the factors that reflect technological development and the intensity of technology implementation. The relationships of these factors are analyzed and the model that describes obtained relationships is presented. Based on the obtained model, the forecast is made and the assessment of the development prospects of this region is provided
Educational potential of the Murmansk region as a factor in the development of the Arctic territory in the context of Industry 4.0
Authors: Milskaya E A , Drobintseva D F , Naumova O N , Anosova N E , Safonova A S 
Published: July 2021

Abstract
The paper studies the features of the educational system development in the regions of the Arctic zone of the Russian Federation in the context of the fourth industrial revolution. The authors analyze the areas of education system development in the Arctic zones of the Russian Federation and the Murmansk region. The authors have carried out the analysis of the flagship university educational programs in the Murmansk region and proposed a system of indicators of educational potential, taking into account the peculiarities of training personnel for the Arctic territories.
Cross-polar transit potential of Russia: what prevents its implementation?
Authors: Gladkiy Yu N , Sukhorukov V D , Eidemiller K Yu , Almazova-Ilyina A B 
Published: July 2021

Abstract
Attention is drawn to the cross-polar transit potential of Russia in connection with the expansion of integration ties between the US and Canada, on the one hand, and the countries of East, South-East and South Asia, on the other. It is emphasized that the maintenance of cross-polar routes is considered a product of “high redistribution” and requires significant capital investments. In the Russian literature, the problem of economic efficiency of the organization of transcommunication messages has become the object of research relatively recently. It was the subject of fundamental disagreements among the authors, as some of them are of the opinion that for Russia the operation of Polar routes brings little commercial benefit and poorly takes into account the geopolitical interests of the country. One of the main reasons for this was the transition of the world’s airlines to the use of new aircraft models, and, accordingly, non-stop cross-polar flights. At the same time, the hopes of the authorities of certain Siberian regions to “get rich” at the receptions of thousands of flights a month were “put a cross”. The hypothetical possibility of Russia closing cross-polar air routes in response to the policy of economic sanctions of Western countries is discussed. It is concluded that such a step is unacceptable due to the hypothetical closure of the sky by EU countries for Russian carriers. The authors are convinced that in any case, the Russian Federation needs to take radical measures to develop its own polar aviation, build new modern airports in Siberia, as well as to improve air navigation services for flights in the harsh conditions of the Arctic.
Computer engineering as the knowledge-intensive core of digital Production: origin and development
Authors: Boldyrev Y Y , Glukhov V V , Stelmashonok E V , Krasnyuk L V , Mahmudova G 
Published: July 2021

Abstract
The paper considers the scientific and technical essence of forming and developing computer engineering from the very beginning of engineering analysis and design to the latest achievements in this field. In the course of their work, the authors, following the traditions of St. Petersburg Polytechnic University, rely on the development of the fundamental foundations of the natural science knowledge, which has always served as a measure of engineering development. We consider a fairly long historical period from the time of I. Newton, L. Euler and J.-L. Lagrange, who laid the foundation of engineering sciences, through the XIX and XX centuries to our time. The authors focus on the most important tools of research, for both natural phenomena and engineering calculations, - tools of mathematical analysis. Nearly in the second half of the XX century, with the advent of computers, this tool acquired the features of mathematical modeling technologies. Today this mathematical modeling is the basis for development of advanced methods of computer engineering. But this very tool is evolving at an extremely rapid pace, integrating the most advanced approaches of mathematics, physical mechanics, computer (supercomputer) technologies and information and communication resources. This development, together with a number of other computer technologies, radically changed the concept of the traditional, centuries-old production process and gave rise to the idea of the Digital industry.
The current state of Atlantic salmon reproduction in the Keret River, White Sea basin, and how it can be increased
Authors: Ilmast N V , Alekseev M Yu , Zubchenko A V , Milyanchuk N P , Nemova N N 
Published: July 2021

Abstract
The Keret River is one of large salmon rivers in the White Sea basin. The estimated abundance of Atlantic salmon in the river began to decrease in 1991, reaching a maximum in 1997 due to the abruptly increased illegal fishing level and the invasion of juvenile Atlantic salmon by the monogeny of Gyrodactylus salaris. The studies conducted have shown that the salmon population in the Keret River is depressed and that the average distribution density of juveniles aged 1+ and older is 1.6 fish / 100 m2. Atlantic salmon reproduction on fish hatcheries is important for maintaining the population abundance (farm individuals make up over 50% of the population). Artificial Atlantic salmon reproduction in the Republic of Karelia’s rivers is carried out by the Karelian Branch of Glavrybvod FGBU at the Kem and Vyg fish hatcheries. The fish hatcheries could achieve better results by updating the juvenile breeding technology. An example of a new high-intensity biotechnology is the use of physical factors controlling the vital activity of fish in the various periods of ontogenesis. The study of the effect of low-intensity laser radiation in the early stages of ontogenesis has shown that red light over a certain dose range enhances the adaptability of fish by decreasing mortality and accelerating growth, thus decreasing the loss of fish products in fish hatcheries.
Development of a digital platform for the implementation of distributed control and navigation systems for underwater robotic systems performing technological operations in Arctic
Authors: Filaretov V F , Yukhimets D A , Zuev A V , Gubankov A S , Minaev D D 
Published: July 2021

Abstract
The paper proposes the architecture of a digital platform for the implementation of distributed control and navigation systems for underwater robotic systems that perform technological operations in Arctic. A system of command has been developed for this platform, which provides flexible assignment of various types and purposes of underwater robots missions. The concept of creating distributed control systems of the underwater robots is proposed. It provides the compatibility of existing on-board underwater robots systems with the proposed solution based on compact hydroacoustic systems of global hydroacoustic navigation developed in PAO “Dalpribor” (Vladivostok).