bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Italian interdisciplinary citizen observatory for the protection and promotion of night skies on year 12 of its evolution: challenges and opportunities from a Digital Earth perspective
Authors: Giacomelli A , Maggi E , Massetti L 
Published: July 2020

Abstract
Citizen observatories are community-based systems that can complement official networks for environmental data collection. This study proposes the case of a Citizen Observatory on light pollution, developed in Tuscany since 2008. Starting from the collection of measurement by volunteers, the observatory is now composed by a heterogeneous array of subjects (two research institutions, two rural communities, a rock-blues band, and a professional photographer) operating from local to international level through its connection with the international scientific community. This collaboration produced several outcomes: light pollution monitoring campaigns, numerous outreach events for raising citizen awareness on light pollution and its consequences and for the promotion of dark sky areas, input to global level position papers and scientific publications, the organization of an international Symposium on promotion and protection of the night sky.
Using Open Remote Sensing and Geographic Data for SMART Monitoring of Nature-based TOURISM in the Azores Islands Natural Parks: towards (more) Sustainability
Authors: Gil Artur , Fernández-Urrutia Manuel , Tiago Flávio , Teresa Borges-Tiago Maria 
Published: July 2020

AbstractA remote sensing-based operational tool using Sentinel-2 and Landsat-8 free and open access satellite multispectral data, and based on the Google Earth Engine (GEE) platform, is under development for monitoring land-cover/land-use changes in the Azores Islands Natural Park.
RUS Copernicus: an Expert Service for New Sentinel Data Users
Authors: Guzzonato E , Mora B , Remondière S , Palazzo F 
Published: July 2020

Abstract
With an unprecedented amount data acquired continuously, the Copernicus satellite constellations provide essential information for analysing and monitoring the Earth’s surface and atmosphere. However, technical and knowledge barriers may affect user’s uptake of such datasets. The Copernicus Research and User Support (RUS) Service (funded by the EC and managed by ESA) began operations in October 2017 and aims to support overcoming such issues. Provision of scalable, preconfigured cloud environments offers users the possibility to remotely store and process data. The platform relies on Free and Open-Source Software (FOSS). In addition, technical and scientific support (including training sessions) is provided to facilitate exploitation of Copernicus data. The RUS Service is specially addressed to users from European countries that are willing to discover and use Copernicus core products and datasets. The service is free for the eligible end users. Commercial and operational activities cannot be carried out through the RUS Service.
Estimation of winter wheat leaf area index at different growth stages using optimized red-edge hyperspectral vegetation indices
Authors: Xing Naichen , Huang Wenjiang , Dong Yingying , Ye Huichun , Pignatti Stefano , Laneve Giovanni , Casa Raffaele 
Published: July 2020

Abstract
Leaf area index (LAI), as one of the most important indicators in vegetation growth monitoring, has been widely used in crop growth monitor and yield estimation. Previous studies focused on LAI retrieval for whole growth stages, this study inversed LAI at five main growth stages using widely-acknowledged vegetation indices and their optimized red-edge transformations. We used hyperspectral data to analyse relationships between LAI and vegetation indices. Partial least square discriminant analysis (PLS-DA) was used in this study to distinguish the best indices for distinct growth stages. The results show that LAI retrieval at various growth stages have distinct results. The best fitted indices for different growth stages are not fixed. The best indices for five stages are OSAVIre1, SRre1, SAVIre2, SAVIre2 and OSAVIre1 with R2 value of 0.20, 0.50, 0.49, 0.72 and 0.23, respectively. Most vegetation indices show better performance in milky stage than other four stages this may due to the high vegetation cover in this stage because leaves rise to maximum. Indices composed of red-edge exhibited better relationships with LAI with higher R2 and lower RMSE. Indices combined reflectance at 740 nm are capable of inversing LAI at stem elongation, anthesis and milk development stages. Indices with 705 nm showed better results in jointing and ripening stages. The results indicate that:1) specific vegetation indices for distinct growth stages lead to better estimation than inversing LAI for whole growth stages; 2) indices take advantage of red-edge showed better potentials in estimating high LAI than traditional visible wavelength.
Developing Standards for Earth Observation Data Products
Authors: Khalsa S J S 
Published: July 2020

Abstract
Earth Observation data, as one element of the rapidly expanding world of Big Data, holds the potential to assist in addressing many of the societal and environmental problems facing humanity. Standards, especially community-developed open standards, are an important part of the solution. This paper describes the activities of the IEEE GRSS Standards for Earth Observations Technical Committee in developing standards to improve accessibility and interpretability of data from several kinds of remote sensing technologies.
Digital Approach to Forest Cover Mapping: a Case Study of Forest-Tundra in the near-Yenisei Siberia
Authors: Ryzhkova V A , Danilova I V , Korets M A 
Published: July 2020

Abstract
An algorithm of semi-automated classification and mapping of vegetation cover was developed based on the digital data (satellite images, digital elevation model, and climate data base) and ground truth data. The obtained maps cover a range of vegetation growth conditions, diversity of the vegetation types, and bog complexes in the forest-tundra zone of the Middle Siberia.
The value of and impediments to open data Sharing of microbial Whole Genome Sequences (WGS): - The next global machine: the Global Microbial Identifier
Authors: Schlundt J 
Published: July 2020

Abstract
As Next Generation DNA Sequencing (NGS) spreads globally fast, there is an obvious potential to develop a global microbial DNA database to aggregate, share, mine and use microbiological genomic data. In the future, all microbial species, strains, clones will be in the database, enabling any laboratory to upload its sequence and seek the correct identification answer, meaning species, type (clone) and antimicrobial resistance. Thiswill also enable real-time global surveillance of all relevant communicable diseases (human, animal, plant). Such a system would promote equity in access and is suggested in the global initiative: the Global Microbial Identifier (www.globalmicrobialidentifier.org)
Remote Sensing data for the investigation of geo-hazard: EO4GEO project and the knowledge sharing challenges
Authors: Cipolloni C. , Comerci V. , Delfini C. , Ferrigno F. , Guerrieri L. , Leoni G. , Spizzichino D. , Ventura R. 
Published: July 2020

Abstract
The improved capabilities of Remote Sensing in data acquisition, analysis and implementation of standardized products lead decision makers and managers to a better understanding and assessment against geo-hazard. But since geo-hazard pose potential risks to people, assets and the environment the better knowledge to deal with the huge amount and the high quality of Earth Observation data is required. EO4GEO Project represents the latest challenge to define a standard methodology for the creation of integrated application using EO data and services to carry out geo-hazard risk monitoring, assessment and mitigation options.
Biomass and Coppicing Ability of Genetically Improved Calliandra calothyrsus for Wood-Energy with Different Spacing
Authors: Hendrati R L , Hidayati N , Nurrohmah SH 
Published: July 2020

Abstract
Beside wood quality, biomass and ability to coppice of fast-growing woody species for renewable energy are two essential indicators. Appropriate spacing among individual plant is therefore required to get the best harvest. This study is observing biomass, branching and coppicing ability of Calliandra calothyrsus at different spacings. Initial experimental plots were using 5 blocks of 16 individuals at spacings of 0.5x1; 1x1; 0.5x2; 1x2 and 2x2m and assessed at 6 months old around reproductive stage. Due to no significant differences, two spacing plots of 2x1 and 1x1m are compared for biomass and wood dimension assessment from 14 individuals per block replicated into 4 blocks after 3 years. Coppicing ability was counted after 2 months of felling. The results indicated that diameter has positive correlation with number of initial branches as well as number of coppices. Specific gravity of wood is also increasing with diameter. Between the two types of spacing, the first wood production is better for 1x1m than 1x2m with 76.3 ton/ha (152 m3/ha) for 1x1m and 72 ton/ha (144 m3/ha) for 1x2m. This indicates a better production than the predicted MAI from the breeding. Specific gravity is recorded to be better at more spaciuos distance.
Relationship betweenAcacia mangium × Acacia auriculiformis hybrids and their parents based on leaf and root anatomy characteristics
Authors: Sunarti S , Nirsatmanto A , Permatasari I , Suharyanto  
Published: July 2020

Abstract

Acacia mangium×Acacia auriculiformishybrids do not always perform intermediate features of both parents. A study was conducted to observe the similarity of Acacia hybrid progenies to their parents based on anatomical features of leaf and root. Leaf and root samples were taken from each three sampled trees of Acacia hybrid and parent species selected on three growth superiority classes: superior, intermediate and inferior. The anatomical features were observed on leaf and root tissue specimens prepared through free-hand and non-embedding technique. Similarity and relationship indexes were determined using cluster analysis.The similarity index between the superior hybrid and female tree was higher than that ofthe male tree with similarity index value of 88.45% and 87.60% respectively. Based on the phenogram analysis, the parent species were clustered into two clearly separated groups with the distance of 86%. The superior and intermediate classes of Acacia hybrids tended to cluster into female parent group. Superior Acacia hybrids could be potentially produced by selecting the superior female parents as mother.
Effect of methylisothiazolinone biocide in tissue culture sterilization of Casuarina equisetifolia
Authors: Putri A I , Prastyono  , Haryjanto L , Herawan T , Fauzi A , Izudin E , Setiawan A , Suprihati  , Hartono R , Priatna D , Herdiantara B , Suharyanto  , Wahno I 
Published: July 2020

Abstract
In this study, modification of tissue culture sterilization techniques using methylisothiazolinone bocide (MB) in liquid and solid medium was used to evaluate the acquisition of axenic Casuarina equisetifolia culture in vitro with natureexplant sources. One experimental unit had 12treatment combinations with 20replications of explants in each treatment. Acquisition of the best axenic culture of C. equisetifolia after 30 days of incubation was in a sterilization combination for 3 days shaking out in liquid WPM medium with 8 mg/l MBand in solid WPM medium with 6 mg/l MB.C. equisetifoliashowsa good growth response in WPM medium without the addition of exogenous growth hormone. The first indication of axillary shoot explants were elongation response within 15 days of culture initiation. Shoot tips changed in color from dark green to a more obvious transparent green and the internode sections became swollen and barrel-shaped. Single shoot formation from axillary buds at basal nodes and sprouted lateral buds were visible within 30 days. The 90%of shoot formation in the axenic culture of Casuarina equisetifolia werefrom lateral buds.
Genetic Structure of Calophylluminophyllum L. in Dompu Natural Forest
Authors: Nurtjahjaningsih I L G , Prihatini I , Qiptiyah M , Rimbawanto A 
Published: July 2020

Abstract

Calophylluminophyllum is an indigenous species and distributed mostly at shoreline areas in Indonesia. Genetic conservation of this species inits natural habitats is very important. A study aimed to assess genetic diversity and structure of C. inophyllum at Dompu natural forestwas carried out. Leaf samples were collected from three natural populations at Dompuregency (Kilo, Kempo and Pekat). Genetic analysis was carried out using six simple sequence repeats (SSR) markers. Private alleles were only found at Kilo population. Number of detected alleles (NA), values of alleles diversity (AR) and gene diversity (HE) were also higher at Kilo (NA: 17; AR: 2.219; HE: 0.339) than at Kempo (NA: 10; AR: 1.661; HE: 0.219) and Pekat (NA: 12; AR: 1.941; HE: 0.276). The values of the inbreeding coefficients (FIS) were insignificant among the populations. The medium- scale genetic structure showed that genetic relations. Fine-scale genetic structure analysis showed insignificant genetic structure among trees in distance of 2 m at Kilo and 400 m at Pekat, respectively, suggesting that C. inophyllum was dispersed as far as 2 m to 400 m.
Seed handling of specific forest tree species : Recalcitrant and intermediate seed
Authors: Yulianti  , Putri K P , Yuniarti N , Aminah A , Suita E , Danu  , Sudrajat D J , Nurhasybi  , Syamsuwida D 
Published: July 2020

Abstract
Indonesia is a tropical country with an area of rain forests around 128 million ha. Forests have economic, social and environmental functions, therefore those functions must be sustained. Seeds are a very important part for maintaining the sustainability of forest functions, by providing good quality of seeds and seedlings. Nearly 70% of the seeds of forest plants in Indonesia are recalcitrant and intermediate, dominated by species of Dipterocarpaceae, Myrtaceae, Araucariaceae, and Verbenaceae. In general, the characteristics of the seeds can be divided into 3 groups based on their sensitivity of drying and storability, namely orthodox, recalcitrant and intermediates. The viability of orthodox seeds can be maintained for long storage periods in low temperatures, whereas recalcitrant seeds are difficult to store for long periods and loseitsviability in a short time. Intermediate seeds are in between of the two characters, that the viability can be kept for a longer time (generally less than 1 year) than recalcitrant seeds. The main problems for recalcitrant and intermediate seeds are their short life time and for some species, the flowering and fruiting periods do not occur every year, especially for the species of Dipterocarpacae. These problems makedifficult to get large quantities of high-quality seeds. Therefore, seed handling techniques of recalcitrant and intermediates seeds are urgently needed. A proper seed handling is the key to maintain the physical, physiological and genetic quality of seeds which should be carried out by involving several activities including techniques of seed production, seed testing, seed storage, and nursery technique.
B-site Substitution Effects on The Catalytic Activity of Perovskites Compounds towards Oxidative Degradation of Orange II Solutions
Authors: Nur Ain Abdul Rahman Nadhratul , Aida Zubir Nor , Alrozi Rasyidah , Imam Maarof Hawaiah 
Published: July 2020

Abstract
Perovskite is known as potential decent ceramic metal oxides catalyst for wastewater treatment particularly in catalytic oxidation process. Perovskites can be uniquely and chemically tailored due to its simple structure which able to accommodate wide range of A and/or B-site cations. In this work, detailed investigations on the substitution effect of different B-site cations into the main structure of perovskite compounds towards catalytic oxidation of orange II solution were performed. Four (4) different types of B-site metal cations (Cu, Ni, Mo and Co) were substituted into perovskites structure via a combined EDTA-citric acid complexation method. The reactivity of resultant perovskites was found to be in sequence of Na0.27Ca0.48Cu0.25O3 > Na0.25Ca0.48Ni0.27O3 ≍ Na0.09Ca0.29Mo0.62O3 > Na0.02Ca0.33Co0.39O3 in the absence of stimulant or oxidant during 2 hours heterogeneous reaction. Interestingly, Na0.09Ca0.29Mo0.62O3 perovskites catalyst exhibited superior catalytic activity by having complete Orange II removal (≍99%) in the presence of oxidant (0.022M H2O2) within 15 min of reaction. The reactivity of B-site perovskites catalysts changed significantly in presence of oxidant during heterogeneous reaction that can be represented as Na0.09Ca0.29Mo0.62O3> Na0.27Ca0.48Cu0.25O3>Na0.02Ca0.33Co0.39O3>Na0.25Ca0.48Ni0.27O, respectively. Such findings confer tunable and unique catalytic properties of B-site perovskites catalysts in enhancing the oxidative degradation of recalcitrant dye contaminated wastewater effluents.
Characterization of Fly ash and Ground Granulated Blast Slag for Soil Stabilization Application Using Geopolymerization Method
Authors: Rizki Abdila Syafiadi , Mustafa Al Bakri Abdullah Mohd , Faheem Mohd Tahir Muhammad , Ahmad Romisuhani , Syafwandi  , Isradi Muhammad 
Published: July 2020

Abstract
Clay soils provide several challenges for geotechnical and civil engineers. This type of soils has a low strength, high plasticity and can cause damage to the road pavement such as crack and soil strength reduction. Thus, require stabilization method. Continue of research and investigations have been done to find other alternative in soil stabilization that eco-friendly. Geopolymer, one of the alterative eco-friendly soil stabilization method offering small swelling potential and outstanding adhesion to soil properties, which could be an effective soil stabilizer. Geopolymer is a reaction that chemically integrates minerals that involves naturally occurring silicoaluminates sources. The geopolymer synthetized from soil, fly ash, ground granulated blast slag and an alkaline solution made from sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). The characterization testing includes physical properties, X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) to examine the physical properties, elemental chemical composition, mineralogical properties, microstructure, and bonding chemical of the raw material, respectively. Based on the characterization result, the soil, fly ash and ground granulated blast slag consists mainly of silica (SiO2) and alumina (Al2O3) which make it suitable to be used as raw materials for geopolymer formation. This paper presents a characterization analysis of soil, fly ash and ground granulated blast slag as raw materials for soil stabilization application using geopolymerization method.
The Influence of Sodium Hydroxide Concentration on Physical Properties and Strength Development of High Calcium Fly Ash Based Geopolymer as Pavement Base Materials
Authors: Ahmad Sofri Liyana , Mustafa Al Bakri Abdullah Mohd , Rosli Mohd Hasan Mohd , Huang Yue 
Published: July 2020

Abstract
This paper deals with the development of high calcium fly ash based geopolymers. Geopolymer paste was prepared from fly ash alkaline activator solutions using various mix design including molarity of sodium hydroxide used (6-14M) with solid-to-liquid ratio (1.0-3.0) and the sample were curing at ambient temperature. In this paper, flow value, setting time and unconfined compressive strength of high calcium fly ash based geopolymer paste was carried out using flow table equipment, Vicat’s apparatus and compression testing machine to measure the properties caused by high calcium fly ash. It was found that solid to liquid ratio of 2.0 and NaOH molarity of 12M was the best mix design to be applied due to its maximum unconfined compressive strength achieved (up to 19MPa at 28 days) as well as its flow ability of the fresh paste which shown better result compared to other mix designs. High calcium was also found to result in higher strength.
Harmful Heavy Metals and Liquid Organic Waste Membrane Based on Fly-Ash/TiO2-rGO Composite
Authors: Permatasari A.D. , Fahira N. , Fadhila N. , Subaer  
Published: July 2020

Abstract
This study utilized fly-ash and TiO2/rGO as raw materials to produce membrane for absorbing harmful heavy metals and liquid organic waste. Graphene oxide (GO) was synthesized by using modified Hummer’s method and then transformed into reduced Graphene Oxide (rGO) by means of hydrothermal reduction at 160°C for 4 hours. The objective of this research was to identified the structure and morphology as well as the ability of the produced membrane to absorb heavy metals. The x-ray diffraction (XRD) examination showed the high purity of GO and rGO nanoparticles. Scanning electron microscopy (SEM) images for each TiO2 concentration showed that membrane added with 1% TiO2 result in homogenous distribution of TiO2 and rGO on the surface of geopolymer. Atomic Absorption Spectroscopy (ASS) showing significant differences of Fe heavy metal of the contaminant concentration before and after filtration. Fe concentration in the first concentration was 1.226 ppm and become 0.239 ppm after filtration process was performed. The results of this study indicate that the membrane based on geopolymer/TiO2-rGO contain 1% of TiO2 and rGO relative to the mass of the starting fly-ash can be used as a membrane of heavy metal absorption.
Effect of Xylanase Immobilisation Conditions by Combination of Entrapment and Covalent Binding on Alginate Beads
Authors: Sabrina Mohd Sukri Siti , Sakinah Abdul Munaim Mimi , Wan Zuraida , Hassan H , Nur Fadzeelah A K , Jamaludin S K 
Published: July 2020

Abstract
The immobilisation of enzymes offer improvement in enzyme stability and characteristics as well as overcome the limitations of free enzyme systems for commercial purposes. In the current study, xylanase was immobilised using a combination technique of entrapment and covalent binding within and onto calcium alginate beads. The sodium alginate and calcium chloride (CaCl2) concentration used for the preparation of alginate beads which is the support matrix for xylanase immobilisation were fixed at 3% (w/v) and 0.3 M, respectively. The effect of immobilisation conditions (agitation rate, enzyme loading, and glutaraldehyde concentration) were studied using One-Factor-At-a-Time (OFAT) approach. The best condition for optimum immobilisation yield (83.93%) was found to be made up of the following parameter combination: agitation rate, 200 rpm; xylanase loading, 200 U; and glutaraldehyde concentration, 12% (w/w). The study shows the immobilisation conditions play a significant role towards the immobilisation yield of xylanase.
The Influence of Temperature and Pressure Variation on the Reactivity of Multimetallic-Zeolite Hybrid Catalyst for Methanol Synthesis from Carbon Dioxide
Authors: Zahiruddin Ramli Muhammad , Syed-Hassan Syed Shatir A. , Hadi Abdul 
Published: July 2020

Abstract
The potential of Cu/Zn/Al/Zr – ZSM-5 zeolite hybrid catalyst, prepared by using the newly-improvised technique, namely ultrasonic spray precipitation (USP) is being explored in converting CO2 into methanol. In this study, the effect of reaction temperature (400–560K) and pressure (20–50 bar) towards catalytic activity were investigated. This technique had influenced the formation of ultrafine particles (75 nm) with relatively high BET surface area (167 m2 g-1) and both Cu surface area (12.5 m2 g -1) as well as Cu dispersion (8.88 %). TPD profile of H2 and CO2 revealed that this catalyst possess a multiple adsorption states at low (353–383 K) and high (653–858 K) temperature region. Reactivity – wise, an increment of pressure had improved the CO2 conversion and methanol selectivity with maximum value of 35.5 % and 28 %, respectively. In contrast, the exothermic nature of CO2 hydrogenation reaction had retarding both CO2 conversion and methanol selectivity at temperature higher than 523 K with the highest value for both were 36.3 % and 20.7 %, respectively.