bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research and Application of Knowledge Graph in Teaching: Take the database course as an example
Authors: Qin Yuehua , Cao Han , Xue Leyi 
Published: August 2020

Abstract
With the rapid development of technologies such as artificial intelligence and deep learning, education informatization has entered the 2.0 era with artificial intelligence as the main feature. As an important part of artificial intelligence technology, knowledge graph provides possibilities for smart education and promotes the innovation and development of smart education. At this stage, the core concepts and knowledge systems of some computer science disciplines need further clarification and improvement. Using a large amount of course-related information to construct an educational knowledge graph, processing and analyzing the knowledge points in the course, extracting the knowledge entities and effectively integrating them, can greatly help to clarify the knowledge system of the subject. The improvement of the teaching quality of this subject is of great significance. Therefore, this paper selects the construction of educational knowledge graph as research content, and uses database courses as examples of graph construction for research. The BIO tagging method is used to construct the database subject dataset, at the same time, it builds knowledge card based on educational knowledge graph to achieve database teaching wisdom, systematic teaching content, integration of knowledge fragments and improve the quality of learning.
Research on Data Processing Architecture of NQI Service Platform in Intelligent Measurement Domain
Authors: Fang Xu , Liu Yongguang , Wang Yong 
Published: August 2020

Abstract
At present, the quality control and management of smart meters exist in production enterprises and power grid companies respectively. There are some problems, such as weak system, lack of coordination, and lack of overall technical solution ability. By carrying out the design of NQI service platform to support the quality improvement of smart meters, the quality data collection and quality monitoring of smart meters in multiple factors, dimensions and the whole process are realized, and the quality level of smart meters is promoted comprehensively. The NQI service platform focuses on the storage and processing of massive quality data of smart meters, improving the efficiency of quality data mining and utilization, and achieving the overall quality improvement of smart meter industry. In this paper, through the analysis and research of service scenario, the massive quality data analysis and processing mechanism of intelligent power meter is designed.
Pressure- and temperature- driven phase transitions in pyridine
Authors: Gromnitskaya E L , Danilov I V , Kondrin M V , Lyapin A G , Brazhkin V V 
Published: August 2020

Abstract
Studies of aromatic and heteroaromatic compounds under high pressure in recent years have attracted great attention to the possibility of the synthesis of amorphous hydrogenated materials with attractive technological properties. In this context, pyridine is of particular interest in terms of its rich polymorphism. We studied the liquid and solid phases of pyridine by dielectric spectroscopy and pulsed ultrasonic methods in the pressure and temperature range P <4.2 GPa and 78 <T <350 K. It is shown that up to 20% of the sample passes into the glassy state during crystallization from the melt to the low-pressure phase. Disordered phase has a high dielectric constant and a high absorption coefficient of ultrasound. All these features are absent in the high pressure phase.
Journal of Physics: Conference Series High-pressure specific heat technique to uncover novel states of quantum matter
Authors: Larrea J Julio , Martelli V , Rønnow H M 
Published: August 2020

Abstract
AC-specific heat measurements remain as the foremost thermodynamic experimental method to underpin phase transitions in tiny samples. However, its performance under combined extreme conditions of high-pressure, very low temperature and intense magnetic fields needs to be broadly extended for investigation of quantum phase transition in strongly correlated electron systems. In this communication, we discuss the determination of specific heat on the quantum paramagnetic—insulator SrCu2(BO3)2 by applying the AC-specific heat technique under extreme conditions. In order to apply this technique to insulating samples we sputtered a metallic thin film-heater and attached thermometer onto sample. Besides that, we performed full frequency scans with the aim to get quantitative specific heat data. Our results show that we can determine the sample heat capacity within 5% of accuracy respect to an adiabatic technique. This allows to uncover low energy scales that characterize the ground state of quantum spin entanglement in SrCu2(BO3)2.
Exploring pressure effects on metallic nanoparticles and surrounding media through plasmonic sensing
Authors: Martín-Sánchez C , Seibt S , Barreda-Argüeso J A , Rodríguez F 
Published: August 2020

Abstract
The sensing capabilities of gold nanorods under high-pressure conditions were investigated in methanol-ethanol mixtures (up to 13 GPa) and in water (up to 9 GPa) through their optical extinction. The longitudinal SPR band of AuNR exhibits a redshift with pressure which is the result of two main competing effects: compression of the conduction electrons which increases the bulk plasma frequency (blueshift) and increase in the solvent density (redshift). The variation in de SPR peak wavelength allows us to estimate the bulk modulus of the gold nanoparticles with a precision of 10 % and to obtain analytical functions providing the pressure dependence of the refractive index of water in three phases: liquid, ice VI and ice VII. Furthermore, the SPR band shows abrupt jumps at the liquid to ice phase VI and ice phase VII transitions, which are in accordance with the first-order character of these transitions.
Detonation properties of the mixtures of tetranitromethane/methanol and tetranitromethane/nitrobenzene
Authors: Mochalova V M , Utkin A V , Rykova V E , Koldunov S A 
Published: August 2020

Abstract
In this work, the reaction zone structure, stability of detonation waves and limits of detonation propagation in the mixtures of tetranitromethane/methanol and tetranitromethane/nitrobenzene depending on the diluent concentration, were studied by a VISAR laser interferometer with a nanosecond time resolution. In the experiments, a sharp change in the reaction zone at the concentration of diluents in the vicinity of stoichiometry is observed – the amplitude of von Neumann spike decreases significantly. This is due to an increase in the initial reaction rate, which leads to the decomposition of HE directly in the shock wave front. It was found that the addition of diluent resulted in an increase in the detonation velocity of the tetranitromethane/diluent mixture in the vicinity of the stoichiometric concentration (about 25% of methanol or nitrobenzene). In almost the entire concentration range, the detonation waves are stable with respect to the formation of the cellular structure of the front. At the same time, in the range of diluent concentration of 15-35%, a poor reproducibility of the amplitude values of the particle velocity from shot to shot is observed. This is probably due to the longitudinal instability of the detonation waves in the mixture.
Study of the shock-wave compressibility of heterogeneous anisotropic materials
Authors: Mochalova V M , Utkin A V , Rykova V E , Yu Shakula M , Yakushev V V 
Published: August 2020

Abstract
Investigation of shock-wave compressibility of three anisotropic materials (carbon fibre reinforced plastic, textolite and kevlar) was performed by a VISAR laser interferometer. Two of these composites consist of the same aramid fibers (textolite and kevlar) and two of them have the same structure (CFRP and kevlar). The structure of compression pulse and shock wave velocity of materials were obtained in each experiment. The shock wave structure in tested composites significantly depends on the fibers orientation - a two-wave configuration is recorded in almost the entire range of studied pressures when shock wave propagates along the fibers. Hugoniot parameters of anisotropic materials were obtained in the coordinates of the shock wave velocity D – particle velocity u for two orientations of the fibers. Hugoniots of kevlar, textolite and CFRP with perpendicular orientation of the fibers are parallel to each other. For kevlar and CFRP, the shock wave compressibility almost does not depend on the fibers orientation relative to the direction of the shock wave propagation. In textolite with parallel orientation of the fibers, the shock compressibility is determined by the properties of unidirectional aramid fibers, and Hugoniots for two directions differ significantly.
Density functional theory plane-wave/pseudopotential calculations of the equation of state of rhenium in the terapascal regime
Authors: Rech G L , Perottoni C A 
Published: August 2020

Abstract
The equation of state (EOS) of hexagonal close-packed rhenium has been previously determined up to 1.5 TPa (V/V0 = 0.46) using all-electron (AE) density functional theory (DFT) including core relativistic effects [Phys. Rev. B 100, 174107 (2019)]. This work focuses on assessing the validity of pseudopotentials at such high-pressures, above 1 terapascal (TPa), by comparing the EOS obtained using plane-wave/pseudopotentials (PW/PPs) with previous AE calculations. Both ONCV pseudopotentials tested (PBE and PBEsol) yield results in good agreement with all-electron calculations. The fitted parameters of the Rose-Vinet EOS, the bulk modulus, B0 (380(2) GPa and 379(3) GPa for the PBE and PBEsol PPs), and its pressure derivative, B0’(4.58(2) and 4.59(3) for the PBE and PBEsol PPs), are in good agreement with previous all-electron results (B0=367(5) GPa and B0’=4.64(3)). The agreement is worse for the equilibrium volume at zero pressure, V0 (199.9(2) Bohr3 and 199.2(2) Bohr3 for PBE and PBEsol PPs, versus 196.7(3) Bohr3 for AE). Even so, for a given V/V0 ratio, the pressures estimated using the EOS derived from the PPs and AE calculations are in very good agreement, thus suggesting that the PPs used in this study are valid even at such high compression regime.
Global surface air temperatures in CMIP6: historical performance and future changes
Authors: Fan Xuewei , Duan Qingyun , Shen Chenwei , Wu Yi , Xing Chang 
Published: August 2020

Abstract
Surface air temperature outputs from 16 global climate models participating in the sixth phase of the coupled model intercomparison project (CMIP6) were used to evaluate agreement with observations over the global land surface for the period 1901–2014. Projections of multi-model mean under four different shared socioeconomic pathways were also examined. The results reveal that the majority of models reasonably capture the dominant features of the spatial variations in observed temperature with a pattern correlation typically greater than 0.98, but with large variability across models and regions. In addition, the CMIP6 mean can capture the trends of global surface temperatures shown by the observational data during 1901–1940 (warming), 1941–1970 (cooling) and 1971–2014 (rapid warming). By the end of the 21st century, the global temperature under different scenarios is projected to increase by 1.18 °C/100 yr (SSP1-2.6), 3.22 °C/100 yr (SSP2-4.5), 5.50 °C/100 yr (SSP3-7.0) and 7.20 °C/100 yr (SSP5-8.5), with greater warming projected over the high latitudes of the northern hemisphere and weaker warming over the tropics and the southern hemisphere. Results of probability density distributions further indicate that large increases in the frequency and magnitude of warm extremes over the global land may occur in the future.
Constructing a qubit POVM from quantum data
Authors: Hillery Mark 
Published: August 2020

Abstract
Given an ensemble of qubits, which we are told consists of a mixture of two pure states, one with probability η
0 and one with probability η
1, we want to find a POVM that will discriminate between the two states by measuring the qubits. We do not know the states, and for any given qubit, we do not know which of the two states it is in. This can be viewed as learning a POVM from quantum data. Once found, the POVM can be used to separate the remaining qubits in the ensemble into two groups, corresponding to the two states present in the ensemble. In order to find the POVM, we need more information about the possible states. We examine several cases. First, we suppose that we know that the Bloch vectors of the states lie in the x–z plane and their a priori probabilities are equal. We next keep the restriction to the x–z plane, but allow the a priori probabilities to be different. Finally, we consider the case in which the Bloch vectors of the states have the same z component.
Industry 4.0 and the future challenges for the local community to manage eco-tourism (a case study of the participatory eco-tourism management in Menipo Island, West Timor, Indonesia)
Authors: Prasetyo B D , Kurniadi R , Setyowati R 
Published: August 2020

AbstractRapid development over the past two decades has brought us to the industrial revolution 4.0 era, where mastering information technology is an absolute thing for people to run their business. This situation is undoubtedly a challenge for the eco-tourism industry that involved local communities as well. This article aims to describe the current situations of the participatory eco-tourism management conducted by the local community and their strategies in dealing with the industrial era 4.0. The study was conducted in 2018 towards local people of Enoraen Village, Amarasi Timur District, Kupang Regency, East Nusa Tenggara Province, as the actors of eco-tourism management. The data and information in this paper are obtained using a quantitative method through the structured interview using questionnaires (n=100) and qualitative methods by collecting scientific writings published in journals and proceedings. This article concludes that there is a gap between the ability of local communities to access knowledge about information technology with massive demands for the use of this technology. We suggest that the development of information technology infrastructure and internet networks must reach remote villages. Furthermore, communities need assistance from any parties in order to be able to use these accesses to support eco-tourism management in Menipo.
Conservation and breeding of natural silkworm (Bombyx mori L.) in Indonesia
Authors: Agustarini R , Andadari L , Minarningsih  , Dewi R 
Published: August 2020

AbstractNatural silk farming is a series of silk agro-industry activities from mulberry cultivation, silkworm maintenance, cocoon production and processing, silk spinning and weaving. Many supporting factors for the development of natural silk in Indonesia. However, the natural silk industry is getting worse with high import values. The main problem is the low quality of silkworm egg seeds. The Forest Research and Development Center (P3H) is a government agency authorized for natural silk commodity development. This study aims to describe the efforts of conservation and breeding of natural silkworm in Indonesia. The material used for conservation is the germ plasma silkworms collection owned by P3H. Whereas for breeding activities, silkworms used are produced from conservation activities. Conservation is carried out using eggs of the same type of strain in the germ-plasma, while breeding is done by crossing various types of moths. The result of conservation is the maintenance of 58 germ plasma silkworms. While breeding results are a type of hybrid caterpillar PS 01, which has a production advantage compared to commercial types CS 03. The dissemination of results such as hybrid PS 01, which has a comparative advantage needs to be improved to help overcome the problem of Indonesian silkworms.
Community adaptation to the “zero burnings” policy on peatlands: cases in Rengas Merah-Riding and Senasih Mulya-Kayu Labu, Ogan Komering Ilir District, South Sumatra Province
Authors: Waluyo E A , Ulya N A , Nurlia A , Martin E , Rahmat M 
Published: August 2020

Abstract
The conversion of peat swamp forest and peatlands is generally caused by the use of fire in land preparation, which is at risk of triggering uncontrolled forest and land fires. Even though the Indonesian government has explicitly banned the use of fire in clearing peatland for agriculture since 2014, which was stated on government regulation number 71 of 2014 concerning the protection and management of peat ecosystems, people still use fire in land preparation because it is cheap. This research investigated how do the community of Rengas Merah-Riding and Senasih Mulya-Kayu Labu, Ogan Komering Ilir Regency, adapt to the “zero burnings” policy? In-depth interviews and Focus Group Discussion (FGD) were used to collect data. Data were analyzed using tabulation and a qualitative descriptive approach. The results of the study indicated that by the prohibition on the use of fire in land clearing, the community has tried to adapt it even though it cannot be fully implemented. The local communities of research site have alternative livelihoods without using fire, which is “bekarang” (fishing) (both site), developing edible bird nest (both site), and making “purun” mat crafts (only in Senasi Mulya-Kayu Labu). The results of the study are expected to be a valid promotion for local livelihoods without burning, as an element of community livelihoods revitalization within the framework of peat restoration programs.
Relation of groundwater level and rainfalls in the peat swamp forest, burned peatland and mixed plantation areas of Kampar Peninsula, Riau Province
Authors: Maryani  , Suryatmojo H , Imron M A , Saputra N , Saliqin D , Arfri R A , Satriagasa M C 
Published: August 2020

Abstract
Peatland forest in the Kampar peninsula have converted into various land uses, mainly converted to palm oil plantation. The massive conversion has decreased biodiversity, changed the hydrological cycle, and increased the peatland fire that dramatically decreased the quality of the peatland ecosystem. It is essential to understand the peatland characteristics and its hydrological cycle to develop sustainable peatland management. This study aimed to determine the characteristics of peat soil and the response of groundwater level to rainfall on burned peatland, mixed plantation and primary peat swamp forests in Siak district. The study was conducted from July to December 2018 by using a hydrometeorological station equipped with rainfall and groundwater level sensors. Disturbed and undisturbed soil samples were analyzed to identify the soil characteristics. The response of groundwater level to rainfall was analyzed using simple regression. The results showed that the burned peatland and mixed plantation have increased bulk density, decreased soil porosity, and caused a decrease of water infiltration. Simple regression analysis between the rainfall and the increase of GWL on the primary peat swamp forest resulted in 0.941(P)0.5106 and an R² value 0.6189, meanwhile on the burned peatland resulted in 1.2127(P)0.7818 and an R² value 0.8616, and on the mixed resulted 0.7455 in (P)0.7831 and an R2 = 0.7557.
Species diversity and threats on the habitat of Vatica javanica in the Ciangir Forest, Indonesia
Authors: Fambayun R A , Kalima T , Rachmat H H 
Published: August 2020

Abstract

Vatica javanica is one of the endemic dipterocarp species in Java. It is highly prioritized to be conserved and categorized as critically endangered A1cd, D ver 2.3 based on International Union for Conservation of Nature red list. There is still a lack of ecological study related to this Javan endemic dipterocarp. At the national level, V. javanica is categorized as critical EN A2cd; B2ab (ii, iii) ver.4.0. Information on the current population condition is essential to support the baseline data for the conservation effort of the species. To investigate the species diversity and threats in V. javanica’s natural habitat, we established 26 transects of 20m x 50m based on the V. javanica’ occurrence and identified all the plant species (d = >1cm) composed V. javanica’s population. V. javanica was only found at four out of 26 transects in the Ciangir forest, Kuningan District, West Java, Indonesia. The result showed that the species diversity in this population was very high, Simpson diversity index (α) = 0.96. Furthermore, based on the result of the critical value index (IVI), the population was dominated by V. javanica (20.97), Ficus sp. (11.01), Eurya acuminata (11.01), Dillenia obovata (10.72), and Lithocarpus sundaicus (10.31). This study identified that natural (landslides) and human intervention (land conversion) as the major threats for the species.
Study of recovery rates of natural forest stands after logging in East Kalimantan
Authors: Susanty F H 
Published: August 2020

Abstract
Recovery assessment of forest conditions after disruption, especially after logging, tends to vary depending on the aspects viewed and who judges. Forests after logging will recovery through succession naturally based on the characteristics of typical carrying capacity and level of damage to the function of time. The purpose of this study is to determine the variation of recovery rates of natural forest stands after logging in different conditions and vary age after logging. The approach to assessing the recovery rate of natural forest stands after logging based on the biometric characteristic performance formulation values, as mentioned as BCP value. The BCP value was constructed and compiled based on the results of studies on permanent STREK plots in KHDTK Labanan. The BCP value is based on four crucial variables, which included: stand density, periodic increments of basal area, evenness index and species abundance. Forest stand conditions on age 1-23 years after logging, the range of BCP values are 11.99-23.48 shows a still low recovery rate. The implications of the BCP value on its four constituent components provide direction for silvicultural treatment needed in order to accelerate the increase of forest stand productivity and ecological review of its constituent biodiversity.
Population assessment of the endangered and valuable timber tree Torem (Manilkara kanosiensis) in Customary Forest of Lorulun, Yamdena Island, Indonesia
Authors: Robiansyah I , Rahadiantoro A 
Published: August 2020

Abstract
Torem (Manilkara kanosiensis) is a timber tree species endemic to Yamdena Island in Indonesia and the Bismarck Archipelago in Papua New Guinea. Due to its high-quality timber, the trees are harvested from its natural populations. These logging activities have put the species into the endangered category according to IUCN Red List since more than 20 years ago. In the present study, the population assessment of Torem will be conducted in the customary forest of Lorulun, Yamdena Island, Indonesia. Distance sampling using line-transect was used to assess the distribution of Torem, identify population size and structure, estimate population density, and update the conservation status of the species. The results showed Torem trees were mostly located at relatively flat areas (4.5±0.2°), with the elevation range of 81-134 m above sea level. A total of 228 individuals of Torem was located during the survey, with more than half of them (56.68%) were within 0-10 cm dbh class. The density estimate of the species was 14.8±4.4 individuals/ha. The assessment of conservation status against IUCN Red List Category and Criteria revealed that Torem was qualified for the status of Endangered A2cd, B2ab (i, ii, iv, v), C2a(i), D.