bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of learning material of integer and fractions based on interactive multimedia with islamic values
Authors: Ahmad J , Handayani I I , Rizki S 
Published: May 2020

Abstract
The objective of this study was to produce learning material of integer and fractions based on interactive multimedia with Islamic values that valid and practical. The type of this research was Research and Development (R & D). The model used 4D (Define, Design, Development, and Disseminate). The research subjects were 10 students of Junior high school of Muhammadiyah 1 Metro. The instruments used expert validation assessment questionnaires to determine the feasibility of the product and questionnaire responses of students to find out the practicality of the product. The results of the percentage analysis of expert validation were obtained on average, that is, 83.54% with very feasible categories. As for the results of the students’ response trials, the average percentage was 87.41% with a very practical category. Therefore, it can be concluded that learning material of integer and fractions based on interactive multimedia with Islamic values were very valid and practically used for learning.
Analysis on hots-based question items of natural science subject in elementary school exam at academic year 2018
Authors: Sari Y , Cahyaningtyas A P 
Published: May 2020

Abstract
Result of Program for International Student Assessment (PISA) in 2015 showed that Indonesia was one of countries that had low ability in scientific literacy. Students were used to working on multiple choice questions on each exam. The National Exam, that is used as a benchmark for national standards in achieving quality students, also use multiple choices. However, components of questions with high-level thinking ability should have existed for a better standard. The purpose of this study was to determine the cognitive levels of students on the National Exam questions in Natural Science subject for elementary school at 2018/2019 academic year. The method in this research was a qualitative method. The data in this study was the script of National Exam questions in Natural Science subject for elementary school at 2018/2019. The data source used in this study was a student book grade 4,5,6 elementary school on Natural Science subject and textbooks about HOTS. Data and data sources were everything would succeed this research. Data analysis techniques in this research consisted of data reduction, data presentation, verification/conclusion stages. In testing the validity of the data, the author conducted a peer discussion. Results of this study were obtained as follows: questions with level 1 level were 17 (42,5 %), level 2 were 11 (27,5%), and level 3 were 12 (30%). The questions with level 3 were in HOTS category as 12 questions.
Evaluation of the accuracy of winnowing, rabin karp and knuth morris pratt algorithms in plagiarism detection applications
Authors: Widaningrum I , Mustikasari D , Arifin R , Pratiwi H A 
Published: May 2020

Abstract
The unethical behaviour of acts of plagiarism has been a disgrace in the educational realm. Using the internet, people can easily find articles or documents that are relevant to their current work, and simply duplicate the sentences or paragraphs without paraphrasing or giving correct citations. Such action falls into the area of plagiarism. In order to minimize the problem, especially in the educational field, it is necessary to develop plagiarism detection applications. The algorithm employed in the application plays an important role in obtaining accurate plagiarism detection results. To the best of our knowledge, three algorithms are commonly used in plagiarism detection applications, namely Winnowing, Rabin Karp and Knuth Morris Pratt, which are all employed in our application. To specify the accuracy of each algorithm, the percentages of the plagiarism detection results are compared to the results from examination by a human expert. From our results, we found that the order of the accuracy from highest to lowest corresponded to the Winnowing algorithm, Rabin Karp algorithm and Knuth Morris Pratt algorithm, with value differences of 1.19%, 53.91% and 83.91% respectively.
The influence of substrate bias and sputtering pressure on the deposited aluminium nitride for magnetoelectric sensors
Authors: Suharyadi H 
Published: May 2020

Abstract
A residual stress of Aluminium nitride (AlN) thin films has been a problem in the magnetoelectric (ME) composites that are used in the AC magnetic field sensors. The present work aims to optimize the deposition process of AlN in order to fabricate a nearly-zero stress of AlN thin films as well as ME composites without losing the microstructural and piezoelectric properties. The influences of RF bias power and sputtering pressure on the residual stress, microstructure, and piezoelectric response have been investigated. Two different stacks are deposited on Si/SiO2 substrates: Ta/Pt/AlN and Ta/FeCoSiB/Ta/Pt/AlN. Pulsed DC reactive sputter depositions have been performed to deposit AlN films. With increasing the substrate bias, stress of the AlN films and the stacks with the magneto strictive layer are augmented. A variation of the sputtering pressure is a promising way to fabricate nearly zero stress of the AlN films and the stacks without the magneto strictive layer. A transition from tensile to compressive stress has been observed at the low sputtering pressure. Sputtering pressure also affects the stress of AlN films and the stacks with the magneto strictive layer. FWHM of AlN (0002) peaks are nearly constant within the ranges of the substrate bias. By reducing the sputtering pressure, FWHM is broadened due to lower ionization degree associated with AlN formation and greater number of micro-arcs. However, the magnitude of e31,f is increased due to a lower residual stress at the low sputtering pressure.
The impact of coronal hole characteristics and solar cycle activity in reconstructing coronal holes with EUHFORIA
Authors: Asvestari E , Heinemann S G , Temmer M , Pomoell J , Kilpua E , Magdalenic J , Poedts S 
Published: May 2020

Abstract
Modelling with high accuracy the open magnetic field and the fast solar wind in the heliosphere is essential for space weather forecasting purposes. Primary sources of open magnetic field flux are Coronal Holes (CH), uni-polar regions that appear as dark patches in the solar corona when observed in X-ray and extreme-ultraviolet (EUV) images due to having significantly lower density and temperature to their surroundings. Therefore, when assessing how well the open magnetic field and the fast solar wind are modelled one can look at how well the model performs on one of its fundamental functions, that of reconstructing coronal hole areas. In this study we investigate how the CH morphology (i.e. latitudinal position of the centre of mass, area, intensity, elongation) and the solar variability, from high to low activity periods, can affect the results. We also investigated the possibility that the model is reconstructing CHs that are systematically shifted with respect to their observed position. The study is applied on 15 CHs exhibiting different latitudinal position and geometry. We compare the modelled CH areas with boundaries obtained by remote sensing EUV observations using the CATCH tool (Collection of Analysis Tools for Coronal Holes). We found no apparent effect of the CH characteristics on the modelling capabilities. In addition, solar cycle activity seems not to have any effect either. However, we emphasize that our sample is small and this outcome highlights the need for an extended research.
Historical solar Ca II K observations at the Kyoto and Sacramento Peak observatories
Authors: Chatzistergos T , Ermolli I , Krivova N A , Solanki S K 
Published: May 2020

Abstract
Archives of full-disc solar Ca II K observations covering even short periods of time can offer important data to fill observation gaps and to allow a better transition from historical to modern data. Two examples of such archives are those from the Kyoto and Sacramento Peak observatories. As most other historical Ca II K data, they suffer from artefacts that need to be accounted for to derive accurate plage areas. Here we present the results of our analysis of these archives of solar Ca II K images.
Optical variability of Active Galactic Nuclei from Catalina Surveys data
Authors: Laurenti M , Vagnetti F , Middei R 
Published: May 2020

Abstract
The Catalina Real-Time Transients Survey (CRTS) has observed a large fraction of the sky (∼33000 deg2), detecting more than 500 million objects several times, so providing a statistically consistent database of multi-epoch observations of various Galactic and extragalactic sources. Therefore, it is particularly suitable to perform variability studies over different timescales. The analysis of active galactic nuclei (AGN) flux variations provides an invaluable insight on these sources since variability encodes the underlying physics of the emitting regions. In this context, we present an optical variability analysis based on a statistical sample of AGN derived from the crossmatching of a preexistent multi-wavelength based catalogue (Multi-Epoch X-ray Serendipitous AGN Sample 2, or MEXSAS2) with the Catalina Surveys Data Release 2 (CSDR2). Visual inspection of the light curves and a novel estimate of the photometric error associated to the Catalina Sky Surveys have been mandatory to obtain a refined sample of 400 quasars widespread over a large interval of redshift (0.1 < z < 3.4) and bolometric luminosity (1045 erg/s ≲ LBoi ≲ 1048 erg/s). We exploit the structure function (SF) method, which works in the time domain, to investigate the short (few days) to long term (up to ∼ 10 years) variability properties of our sample. Our variability analysis suggests a possible underestimate of the photometric errors, which strongly affect the structure functions.
Suppression of backward scattering using chain of high index dielectric nanospheres
Authors: Natanael Misael , Iskandar Alexander A 
Published: May 2020

Abstract
High refractive index dielectric materials have been widely studied in nanophotonics as a substitude for plasmonic materials due to its low dissipative losses and its ability to generate magnetic moments resonance in visible light spectrum. The dimension, geometry, and materials used will affect the excited multipole moments, this can in turn be used to tailor the scattered field. The aim of this study is to design a structure composed of silicon nanospheres arranged in chain-like configuration which can suppress backward scattering. Analytical Mie theory formulation is employed to calculate the scattering field. Results show that by increasing the gap distance between nanospheres at certain incident wavelength, forward-to-backward scattering ratio is increased until it reaches optimum value. Further increase will enhance backward scattering due to higher multipole excitation.
The Equation of Motion Phonon Method and its application to neutron rich odd nuclei
Authors: De Gregorio G. , Knapp F. , Lo Iudice N. , Veselý P. 
Published: May 2020

Abstract
We report on the extension to odd nuclei of a microscopic multiphonon approach known as equation of motion phonon method and its application to the odd neighbors of the neutron rich 22O. A calculation using the chiral potential NNLO
opt
and encompassing up to two phonon basis states provides a description of the spectroscopic properties which is good quantitatively for 23O and qualitatively for 21O and 21N. Serious discrepancies between theory and experiments occur in 23F. A possible recipe for curing them is under investigation.
How to search on EXFOR
Authors: Otuka Naohiko , Soppera Nicolas 
Published: May 2020

Abstract
The experimental nuclear reaction data compiled in the EXFOR library are loaded to databases and accessed by users. The EXFOR library covers not only the cross section but also various other nuclear reaction quantities such as fission yield and thick target yield. It is not always trivial to find an appropriate set of keywords extracting the data sets of interest neither too many or too few. Sometimes users are too specific in their queries, and find nothing in the database. This article presents some examples of EXFOR retrievals for better access to the databases.
Neutron-induced activation cross-sections for fusion technology applications
Authors: Semkova V , Plompen A J M , Troev T 
Published: May 2020

Abstract
Activation method was employed to measure the cross section for the 58Ni(n,pα)54Mn and 63Cu(n,pα)59Fe reactions in the energy range from the threshold up to 21 MeV. The quasi-monoenergetic neutrons in the energy range from 14 to 21 MeV were produced via the 3H(d,n)4He reaction at 1, 2, 3 and 4 MeV incident deuteron energies. High purity Ni and Cu samples with natural isotopic composition and dimensions of ϕ12x5 mm and ϕ20x5 mm respectively were utilized. The gamma-ray spectrometry using HPGe detector was utilized to measure the activity induced in the sample. The cross sections were determined relative to the standard cross section the 27Al(n,α)24Na reaction. The results for the 63Cu(n,pα)59Fe reaction cross section were obtained for the first time.
Analysis of scattering and breakup reactions of 12,14Be within the microscopic model of optical potential
Authors: Zemlyanaya E.V. , Lukyanov V.K. , Kadrev D.N. , Lukyanov K.V. , Antonov A.N. , Gaidarov M.K. 
Published: May 2020

Abstract
Analysis of the differential cross sections of scattering of neutron-rich nuclei 12,14Be on 12C at 56 MeV/nucleon and on protons at energy near 700 MeV/nucleon is carried out within the microscopic model of optical potential (OP). The real part of the 12,14Be+12C OP is calculated by using the double-folding procedure accounting for the anti-symmetrization effects, while the imaginary part of OP is obtained in the framework of the high-energy approximation (HEA). As to the 12,14Be+p scattering at relativistic energies, calculations of the both real and imaginary OPs were made within the HEA approach. In this framework, the only free parameters of OP are the depths of its real and imaginary parts obtained by fittingto experimental data. The role of the 12,14Be density models is considered when reproducing the experimental data. A contribution of the inelastic channels with excitations of 2+ and 3− states in 12C when calculating the quasielastic cross sections is analysed. Also, the 14Be cluster model, in which this nucleus consists of a 2n-halo and the 12Be core, is applied to calculate the cross sections of diffraction breakup and stripping reactions in the 14Be+12C collisions at the energy of 56 MeV/nucleon. A good agreement of the theoretical results with the available experimental data of both scattering and breakup processes is obtained.
Study of Cluster Structure of Light Nuclei by Feynman’s Continual Integrals and Hyperspherical Functions
Authors: Samarin V V 
Published: May 2020

Abstract
Calculations of the probability densities and energies for Nα-cluster nuclei 12C (3α), 16O (4α), 20Ne (5α), 24Mg (6α), 28Si (7α) and for nuclear molecules 9Be (α + n + α), 10Be (α + n + n + α), were performed by the Feynman’s continual integrals method using parallel computing based on NVIDIA CUDA technology. New effective method for the solution of the hyperradial equations with cubic splines approximation is proposed and tested for exactly solvable 4-body system.
Systematics of positron lifetime spectroscopy measurements in ferroelectrics
Authors: Peneva S , Troev T , Kolev B 
Published: May 2020

Abstract
In the paper is demonstrated the use of positron lifetime spectroscopy (PLS) in a comparative study of the results in ferroelectrics. The first part is devoted to the application of PLS as a probe for measurements of ferroelectrics. In Triglycine Sulphate (TGS) (NH3CH2COOH)3H2SO4, Rochelle Salt (RS) NaKC4H4O64H2O and Potassium Dihydrogen Phosphate (KDP) KH2PO4 at different temperatures and gamma irradiation doses is established the existence of three positron lifetime components. This experimental results show that the second long lifetime component as a function of temperature in order-disorder ferroelectrics TGS, RS and KDP is due to the positron trapping in negatively charge defects of ferroelectric. The positron spectroscopy method is effective for measurements of extremely small defects and voids, which is important for the next exploitation period of the ferroelectrics. PLS measurements of ferroelectrics show that about the third lifetime component is due to the local formation of orhto-positronium state on the boundary between the domains. In the second part the PLS analysis has been applied for examination the electronic and defect structure in selected ferroelectrics materials. In gamma irradiated TGS positrons are trapped in the defect states of the oxygen ions of the two radicals CH2COO- and NH3CHCOO-. In RS positrons are trapped also in the defect states of the oxygen ions and OH groups.
Intellectual property right and farmer protection in accessing genetic resources
Authors: Novianto  , Prastanta L D 
Published: May 2020

Abstract
Intellectual Property Rights (IPR) in the field of agriculture are regulated under the Patent Law, the Plant Breeder’s Right Act and the Plant Cultivation System Act. The decision Number 99/PUU-X/2012 of the Constitution Court granted the right of farmers to access genetic resources (GR). The study aims to assert an application relevance of the law on the events in concreto complying with the provisions of law or contract. This is normative law research. This study revealed that if the Plant Breeder’s Right Act and the Patent Act are linked to access to GR, they are not adequately regulated of how fair its benefit-sharing from the use of genetic resources, especially to local communities or farmer which had traditional knowledge (TK). The benefits of IPR are, a form of legal protection against the TK of the population over local varieties, it can utilize GR, and as conservation. IPR has progressively been incorporated into agriculture, namely Law Number 4/2006 concerning the Ratification of the International Treaty on Plant Genetic Resources for Food and Agriculture (PGRFA) and Law Number 11/2013 on the approval of the Nagoya Protocol on access to GR and the fair and equitable benefit-sharing arising from their utilization to the Convention on Biological Diversity. Based on this, it is essential to consider equal and balancing protection between breeder rights and farmer rights.
Strengthening seed delivery system for enhanced adoption of improved sorghum varieties among smallholder farmers in Malawi, Mozambique and Zambia
Authors: Munkombwe G , Nthewa C , Mutaliano J A 
Published: May 2020

Abstract
Many improved sorghum varieties and hybrids have been developed by public research institutions in Malawi, Mozambique and Zambia. However, the seeds are not readily available to small-scale farmers in remote rural areas. The non-availability of improved seed is due to various reasons, including low demand for certified seed and therefore, low profitability. Sorghum has been unattractive to large seed companies, and hence is not taking up production and distribution of these improved sorghum varieties to farming communities leading to low adoption. As a result, a seed system strengthening project was initiated to enhance seed delivery in remote rural areas that cannot access seeds easily. The project is in the first year stage and is being implemented in fourteen districts of Malawi, Mozambique and Zambia. The project activities include early generation seed production of selected sorghum varieties, the establishment of promotional demonstration fields, building the capacity of seed producers and farmers in seed production through training and creating a platform for players in the sorghum seed value chain. The specific objectives are: (i) to improve the availability of sufficient quantities of early generation seed to seed producers, (ii) to strengthen the capacity of sorghum seed value chain players involved in the promotion of released sorghum varieties, and (iii) to promote the use of sorghum certified seed by small scale farmers. The research outputs so far achieved are 250 farmers have been trained in seed production, 10 tons of basic seed of selected varieties have been produced and 144 sites have been established.
MARDI rice genebank: important roles in data management and data sharing
Authors: Noorzuraini S , Shukri M , Amron A , Izzat M , Ramdzan M , Idayu N 
Published: May 2020

Abstract
Malaysia has agreed to adopt the International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA) and acceded to the Treaty in 2004. Under Article 10 of the Treaty, the contracting parties should allow easy access of the genetic resources under Annex 1 Crop through Multilateral System, and Benefit-Sharing raised from the utilization of the resources. To implement the Treaty, MARDI has actively involved in the implementation through the exchange of seeds particularly rice accessions using Standard Materials Transfer Agreement (SMTA) and in data sharing for easy access of rice genetic resources. MARDI has started to involve in adoption and implementation of Digital Object Identifiers (DOIs) and also contributed to the Genesys database though a project named „Building Genesys Catalog of Phenotypic Datasets of Malaysian Rice Germplasm’. In Malaysia, rice genetic resources are conserved at the National Rice Genebank in Penang. The genebank was established in 1989 with the primary purpose to collect and conserve rice genetic resources (Oryza spp.) in Malaysia. Currently, the genebank has conserved a total of 13,020 accessions of rice germplasms consisted of landraces collected throughout the country, introduced varieties, and breeding materials. The rice germplasms are an important source of genetic materials for the development of new rice varieties. To date, 48 rice varieties were developed and introduced to the farmers and local communities. Those varieties possessed consequential and unique traits such as high yield and resistant to pest and diseases, to make them valuable to farmers and local communities. Those varieties are registered and freely accessed in Global Information System (GLIS) website for DOI implementation. Besides, a total of 22 phenotypic datasets including datasets for morphological traits, pest and diseases (brown planthopper, blast and bacterial leaf blight), and quality and speciality traits, are prepared and published in the Genesys portal (database). Data sharing is essential to enhance the breeding program in the country and sharing of valuable genetic resources with other countries for the future development of new varieties for food security and to promote sustainable agriculture.