bluuebunny/crossref_metadata_2025_split huggingface dataset:
Diversity and checklist of Beetles (Arthropoda: Coleoptera) from Forest areas and Agricultural areas of District Akola, (Maharashtra), India
Authors: Shirbhate Milind , Shirbhate Amrita 
Published: June 2020

A survey was organised from August 2016 to February 2020 in the forest areas and agricultural areas of Akola district to know the diversity of Beetles for further research. A total of 68 genera and 90 species belonging to 13 different families of beetles viz. Buprestidae (Metallic Wood-boring Beetle), Carabidae (Ground Beetles), Cerambycidae, Chrysomelidae (Leaf beetles), Coccinellidae, Dytiscidae, Geotrupidae, Gyrinidae, Hydrophilidae, Hybosoridae, Meloidae (Blister Beetles), Scarabaeidae, Tenebrionidae (Darkling Beetles) were collected and identified from various habitats along with their valid scientific names, systematic position, and distribution within agricultural fields and forest areas of Akola district.
In Vitro Simulation of Growth and Survival of Pseudomonas aeruginosa, P. fluorescence and P. putida under Cold Shock
Authors: Muntaka Maniha Syeda , Tabassum Tasmin , Tabassum Tahsin , Noor Rashed 
Published: June 2020

The experimental demonstration of bacterial growth is of large interest within the scientific community to chalk out the specific mechanisms underlying the survival strategies under adverse conditions in nature. An array of research has been conducted on heat shock as well as the related oxidative stresses using a range of bacterial species including Escherichia coli, Bacillus spp., Salmonella spp. and Pseudomonas spp. Present study further focused on the cold shock response within the species of the ubiquitous bacterium Pseudomonas. P. aeruginosa, P. fluorescence, and P. putida were subjected to cold shock by placing the corresponding cultures at low temperatures (0 oC and 8 oC), and then their growth was assessed along with the necessary phenotypic observations. Interestingly, the pigmentation (green or bluish green pigments) was noticed almost in species at 37 oC compared to those growing at lower temperatures. While at 37 oC, P. fluorescence showed the highest growth compared to the other two strains, at 8 oC and even at 0 oC, P. putida showed the maximal growth followed by the growth of P. aeruginosa and then P. fluorescence.
Inclusion Complexation of Benzanilide and Fast Violet B with β-cyclodextrin-A Theoretical Approach
Authors: A. Antony Muthu Prabhu  
Published: June 2020

The theoretical investigation of inclusion complexation of amide-imidol tautomer of two guest molecules benzanilide (BA) and fast violet B (FVB) with β-cyclodextrin (β-CD) using DFT B3LYP 3-21G method in the gas phase. Benzanilide has no substitution in the basic skeleton and the other selected compound substituted with three groups such as –NH2, -CH3 and –OCH3 group in the same aromatic ring. The tautomer of two selected compounds was formed the stable inclusion complexes with the β-CD supramolecule. The theoretically calculated complexation energy was observed the negative value for all the inclusion complexes. This method was applicable to determine the structural assignment of the inclusion complexes between BA, FVB and β-CD.
CERAMIC ASSEMBLAGES OF THE THIRD QUARTER OF THE 15th CENTURY FROM THE FUNA CASTLE: UTENSILS OF THE «GARRISON KITCHEN»
Authors: Teslenko I. B. 
Published: June 2020

The Funa fortress is located in southern Crimea and is one of the reference architectural and archaeological complexes of the Northern Pontic Region with precise date of existence.
The fortress was built by Mangup authorities near 1423 on the border with possessions of Genoese and was destroyed in a fire during the Turkish invasion of the Crimea in 1475. The detailed chronology of the site which includes three stages of its construction history — 1423, 1425—1450s and 1459—1475, has been developed so far. So it becomes possible to clarify the dating of ceramic finds in line with these periods also.
Ceramic assemblages of the last stage from the layers of fire and destruction of 1475 are the most representative. There is the complex from courtyard 1 among them.
The ceramic collection includes 101 and 163 fully or partially reconstructed vessels respectively. There are large and average household containers, various kitchen utensils and tableware, both of the local Crimean production and import (Miletus Ware, Spanish Luster and Blue and White Ware, Fritware). The comparative analysis of artefacts made it possible to establish the chronological changes in ceramic assemblages during 25 years.
Moreover, statistical and typological studies of the pottery from the layer of fire demonstrated a set of vessels there is suitable for cooking and table setting for at least 40 people. Large number of luxury tableware for diverse using and their location in the context allow suggest that there was a large feast on the platform above the «kitchen», and the remains of this banquet were not removed. According to the archaeological evidence as well as analysis of historical events the inhabitants of the fortress could burn it themselves before Turkish invasion and retreat to the capital of the principality at Mangup. Perhaps the remains of a farewell feast arranged just before leaving was fixed archaeologically.
OLBIAN THYMIATERIA OF APHRODITE
Authors: Shevchenko T. M. 
Published: June 2020

Among Olbian terracottas there is a group of Aphrodite’s busts crowned with handmade cups. These bust thymiateria were probably used in this goddess cult for spreading scents and as votives. They come from the excavations at houses and from the Eastern (Central) Temenos. The series of busts is dated to the late period of this temenos functioning: the late 3rd or the first half of the 2nd centuries BC.
The image of Aphrodite with Erotes on her shoulders probably originates from her depictions where she holds her twin sons in her arms. One more variant of this image was the schematic depiction of Erotes heads on her shoulders at the backgrounds of palmettes. They as if peer out of the goddess shoulders and their wings form the palmettes. Terracottas of this variant come from the botroi at the Central and Western Temenoi.
Aphrodite with Erotes on her shoulders is known in coroplastics of many cities while the very image of this full-faced, openly smiling and not young woman is peculiar for Olbia. The same face is reproduced in semifigures of ladies with ivy wreath found in the area near agora. Aphrodite being usually depicted as young and tender looks almost stout on the busts discussed. It can correspond to the image of Aphrodite Ourania.
Olbian bust thymiateria distinguish also by the simply shaped thymiaterion cup. Only handmade cups are known among the materials of the Central Temenos where dozens of busts with broken away thymiateria cups were found.
Bostros served as a place for burying remains from sacral precinct, therefore bust thymiateria lost their value before falling into this context. It could be reasoned by their broken condition, otherwise there could be a new type of bust thymiateria which interchanged the previous. Each variant of serially produced busts was used simultaneously on both temenoi.
THE EXCAVATION IN VYSHGOROD IN 1936
Authors: Kapustin K. M. 
Published: June 2020

The archives and archaeological materials from excavations in Vyshgorod in 1936 are analysed in the paper. This year the large-scale excavations were conducted on the territory of the old city: near the church of st. Borys and Hlib, two sites in the northeast part of the hillfort and few trenches in different parts of the town.
The obtained results correlate with the reports of the narrative sources and indicate the significant development of the city in the period from the 11th to the mid-13th century. The rapid development of the city occurs at that time: the mausoleum of Sts. Borys and Hlib (explored in 1935—1936) becomes the main architectural dominant of the city area. A city square with dwellings and outbuildings were located around the church. The analysis of the archival materials and artefacts from the excavations in 1936 made it possible to clarify and re-examine the allegations established in the works of the mid-20th century.
The author proves that discovered objects have different chronology. For example, dwellings, outbuilding, pits and sacral building of the 11th—13th centuries are pit 1 (site 1), the foundations and remains of the walls of the church of Sts. Borys and Hlib (site 1; site W) and oven 1 (site 4). The ones dated by the middle of the 11th and the 12th centuries are building 1 (site 1) and pit 1 (site 4). Structures of the 12th and 13th centuries are pit 2 (site 1) and oven 1 (site 4); of the second half of the 13th—14th centuries are building 1 (site «W»), building 1, pit 2 (site 4). Finally, dated by the 17th—19th centuries are building 2, burials 1, 2 (site 1) and burials 1—19 (site 4). The cultural layers and objects exclusively of Kyiv Rus time were found on the territory of suburbs (pottery furnaces 1 and 2 in a trench at the south of the hillfort; burials 1—3 in trenches on the territory of the Doroshenko estate).
In general, the obtained results confirm and at some moments substantially detail our knowledge on the historical development of the city during the Middle Ages and Modern times.
COLLECTIONS OF FINDS FROM THE ARCHAEOLOGICAL STUDIES ON THE ST. MICHAEL GOLDEN-DOMED MONASTERY YARD IN 1940s—1960s
Authors: Khamaiko N. V. , Chmil L. V. , Hun M. O. , Myronenko L.  V. 
Published: June 2020

The Scientific Repository of the Institute of Archaeology of the NAS of Ukraine has three collections of archaeological finds coming from excavations on the St. Michael Golden-domed Monastery yard. These are the materials from the excavation of 1940 led by Mikhail Karger, the survey of 1944 led by David Blifeld and observations over the earthworks of Volodymyr Diadenko in 1967. The excavations of 1940 revealed two Old Rus dwellings and several pits on the site between St. Michael Cathedral and the Refectory, as well as the previously unknown Old Rus temple of the 11th century, associated with the St. Dmitro Cathedral. The field inventory books stored in the Scientific Archive of the Institute of Archaeology allow to clarify the locations of excavated sections where the works were carried out, as well as to compile a list of finds with a preserved collection that is about much smaller than the total amount found during excavations. A significant part of it is building remains such as fragments of frescos (some with graffiti), bricks, floor tiles, tiles, acoustic jars, molten lead roof sheets. The collection contains also household items such as fragmented ceramic dishes, amphora containers, grinding stones, and remains of manufacture: a fragment of an iron bloom and the glassware production refuse. In addition, there are some artefacts from graves: fabric, leather shoe details. The finds dated to a wide chronological range from the 10th—11th to the 18th—19th centuries and display the life in the monastery during all this time, without chronological lacunae.
The survey of David Blifeld in 1944 was caused by construction of a vegetable store on the courtyard of the former monastery, and the works of Volodymyr Diadenko in 1967 were apparently related to the supervision over earthworks in the Upper city of Kyiv. There are neither publication, no archive data about the last two stages of research, so collections of archaeological finds are the only source of information about these studies. Both collections are small. The collection of the year 1944 contains the 18th century pottery, as well as three fragments of vessels of the 12th—13th centuries from cultural layer. The collection is incomplete because of significant gaps of inventory numbers.
Observations of Volodymyr Diadenko in 1967 revealed the dwelling of Old-Rus time, which can be dated to the 12th — early 13th century by the available materials (fragments of pots and a big pottery container). The collection also included a half of brick of the 17th—18th centuries and a sherd of acoustic jar that may indicate the location of the site close to any architectural object.
BONE AND ANTLER PRODUCTS FROM THE SMALL HILLFORT OF HORODSK
Authors: Serhieieva M. S. 
Published: June 2020

The materials of bone processing from the Small Hillfort of Horodsk (the Korostyshiv Region of the Zhytomyr Oblast) stored in the Institute of Archeology of NAS of Ukraine are published in the paper. The analysis of the products, technique of manufacture and level of development of bone-carving craft is provided.
Bone artefacts include the completed products, blanks and bone raw material with traces of processing. Bone artifacts come from the cultural layer and the objects dated to two periods: the 12th — first half of the 13th centuries and the second half of 13th—14th centuries.
The composite bilateral comb, socketed arrowhead, fragment of the toggle clasp, two products of tubular bones (bird and animal bones) and the amulet from fish vertebra with the drilled hole could be undoubtedly dated back to the 12th — the first half of 13th centuries. Most likely we also can date to this period the amulet of fang of predator with a hole at one end which comes from the cultural layer.
According to the conditions of find and some analogies the keel-like arrowtip with a splay flat stem, three end parts of knife handles and the hemispherical button could be considered the products of the second half of the second half of 13th—14th centuries. The find from Horodsk confirms the possibility of manufacture of this type of buttons in Rus in the post-Mongol period.
In addition to the completed products the traces of antler processing in the form of scattered deer antlers and semi-finished products were found. The whole complex of bone and antler artefacts (small number of products and the lack of objects with signs of bone-carving workshops) testifies to the possibility of existence of bone-carving handicraft in the hill-fort only as auxiliary craft.
High-resolution Spectral Discriminants of Ocean Loss for M-dwarf Terrestrial Exoplanets
Authors: Leung Michaela , Meadows Victoria S. , Lustig-Yaeger Jacob 
Published: June 2020

Abstract
In the near future, extremely large ground-based telescopes may conduct some of the first searches for life beyond the solar system. High spectral resolution observations of reflected light from nearby exoplanetary atmospheres could be used to search for the biosignature oxygen. However, while Earth’s abundant O2 is photosynthetic, early ocean loss may also produce high atmospheric O2 via water vapor photolysis and subsequent hydrogen escape. To explore how to use spectra to discriminate between these two oxygen sources, we generate high-resolution line-by-line synthetic spectra of both a habitable Earth-like and post-ocean-loss Proxima Centauri b. We examine the strength and profile of four bands of O2 from 0.63 to 1.27 μm, and quantify their relative detectability. We find that 10 bar O2 post-ocean-loss atmospheres have strong suppression of oxygen bands, and especially the 1.27 μum band. This suppression is due to additional strong, broad O2–O2 collisionally induced absorption (CIA) generated in these more massive O2 atmospheres, which is not present for the smaller amounts of oxygen generated by photosynthesis. Consequently, any detection of the 1.27 μm band in reflected light indicates lower Earth-like O2 levels, which suggests a likely photosynthetic origin. However, the 0.69 μm O2 band is relatively unaffected by O2–O2 CIA, and the presence of an ocean-loss high-O2 atmosphere could be inferred via detection of a strong 0.69 μm O2 band, and a weaker or undetected 1.27 μm band. These results provide a strategy for observing and interpreting O2 in exoplanet atmospheres, that could be considered by future ground-based telescopes.
Determining the Composition of Relativistic Jets from Polarization Maps
Authors: Anantua Richard , Emami Razieh , Loeb Abraham , Chael Andrew 
Published: June 2020

Abstract
We present a stationary, axisymmetric, self-similar, semianalytic model of magnetically dominated jet plasma based on force-free regions of a relativistic magnetohydrodynamic simulation. We use this model to illustrate how the composition of relativistic jet plasma can be determined, with special attention to the example of M87. In particular, we compute synthetic Stokes maps in e
−
e
+
p plasmas with various positron-to-proton ratios using synchrotron emission models to scale the partial pressure of electrons and positrons that emit at the observed frequency to the magnetic pressure, taking into account Faraday rotation and conversion. The lepton-dominated models produce bilaterally asymmetric radio intensity profiles with strong linear polarization and Stokes Q and U maps that are bilaterally asymmetric (but strongly correlated across the jet axis) and antisymmetric (and sometimes anticorrelated), respectively. The hadronic models produce more centrally brightened intensity and polarization maps. Circular polarization provides the cleanest observational tool for distinguishing the plasmas, as it increases outward from the jet core and central axis for highly ionic plasma, and is suppressed for pair-dominated plasma. We find a measurable degree of circular polarization V/I of

for subequipartition hadronic jet plasmas averaged over milliarcsecond scales. Our stationary model predicts that the intensity-normalized autocorrelation functions of Q and U increase and decrease with frequency, respectively, for higher plasma betas in our parameter survey. On the other hand, the autocorrelation of V is sensitive to the frequency at lower betas. Multiband polarimetric observations could therefore be used as a novel probe of the composition of jet plasma.
Unveiling the Physical Conditions in NGC 6910
Authors: Kaur Harmeen , Sharma Saurabh , Dewangan Lokesh K. , Ojha Devendra K. , Durgapal Alok , Panwar Neelam 
Published: June 2020

Abstract
Deep and wide-field optical photometric observations along with multiwavelength archival data sets have been employed to study the physical properties of the cluster NGC 6910. The study also examines the impact of massive stars on their environment. The age, distance, and reddening of the cluster are estimated to be ∼4.5 Myr, 1.72 ± 0.08 kpc, and

mag, respectively. The mass function slope (Γ = −0.74 ± 0.15) in the cluster region is found to be flatter than the Salpeter value (−1.35), indicating the presence of an excess number of massive stars. The cluster also shows mass segregation toward the central region due to their formation processes. The distribution of warm dust emission is investigated toward the central region of the cluster, showing the signature of the impact of massive stars within the cluster region. Radio continuum clumps powered by massive B-type stars (age range ∼0.07–0.12 Myr) are traced that are located away from the center of the stellar cluster NGC 6910 (age ∼4.5 Myr). Based on the values of different pressure components exerted by massive stars, the photoionized gas associated with the cluster is found to be the dominant feedback mechanism in the cluster. Overall, the massive stars in the cluster might have triggered the birth of young, massive B-type stars in the cluster. This argument is supported with evidence of the observed age gradient between the cluster and the powering sources of the radio clumps.
Connecting the Local Stellar Halo and Its Dark Matter Density to Dwarf Galaxies via Blue Stragglers
Authors: Casagrande Luca 
Published: June 2020

Abstract
The Gaia H-R diagram shows the presence of apparently young stars at high tangential velocities. Using a simple analytical model, I show that these stars are likely to be blue stragglers. Once normalized to red giant stars, the fraction of nearby halo blue stragglers is of order 20%, and remarkably close to that measured in dwarf galaxies. Motivated by this similarity, I apply to field blue stragglers scaling relations inferred from blue stragglers in dwarf galaxies. Doing this for the Milky Way halo returns an average stellar density of

and a dark matter density of

within 2 kpc from the Sun. These values compare favorably to other determinations available in the literature but are based on an independent set of assumptions. A few considerations of this methodology are discussed, most notably that the correlation between the dark matter halo core density and stellar mass seems to hold from dwarf galaxies to the nearby Milky Way halo.
The Physical Properties of Fermi-4LAC Flat Spectrum Radio Quasars
Authors: Tan Can , Xue Rui , Du Lei-Ming , Xi Shao-Qiang , Wang Ze-Rui , Xie Zhao-Hua 
Published: June 2020

Abstract
In this work, we collect quasi-simultaneous infrared, optical, X-ray and γ-ray data of 60 Fermi fourth LAT AGN catalog (4LAC) flat spectrum radio quasars (FSRQs). In the framework of the conventional one-zone leptonic model, we investigate the physical properties of Fermi-4LAC FSRQs’ jets by modeling their quasi-simultaneous spectral energy distributions (SEDs). Our main results are summarized as follows. (1) There is a linear correlation between synchrotron peak frequency and curvature of the electron energy distribution. As suggested by previous works, the slope of the best linear fitting equation of this correlation is consistent with statistic acceleration that needs a fluctuation of fractional acceleration gain. (2) The γ-ray dissipation regions are located at the range from 0.1 to 10 pc away from the supermassive black hole, and located outside the broad-line region and within the dusty torus. (3) A size relation P
e (the kinetic power carried in relativistic electrons) ∼P
B (Poynting flux) ≤P
r (the radiative power) <P
p (the kinetic power in cold protons) is found in our modeling. Among them, P
e ∼ P
B suggests that SEDs of almost all FSRQs with parameters are close to equipartition between the magnetic field and the relativistic electrons. The P
e < P
r suggest that the most energy of the relativistic electrons are dissipated by EC radiation for FSRQs. (4) There is an anticorrelation between the peak energy of SEDs (γ
peak) and the jet power (P
jet), which is consistent with the blazar sequence.
The Extended Gaia–PS1–SDSS (GPS1+) Proper Motion Catalog
Authors: Tian Hai-Jun , Xu Yang , Liu Chao , Rix Hans-Walter , Sesar Branimir , Goldman Bertrand 
Published: June 2020

Abstract
The Gaia + PanSTARRS1 (PS1) + Sloan Digital Sky Survey (SDSS) + Two Micron All-Sky Survey (2MASS) (GPS1) catalog was released in 2017. It delivered precise proper motions for around 350 million sources down to a magnitude of

mag. In this study, we present GPS1+, the extension GPS1 catalog down to

mag, based on Gaia data release 2 (DR2), PS1, SDSS, and 2MASS astrometry. GPS1+ totally provides proper motions for ∼400 million sources with a characteristic systematic error of less than 0.1 mas yr−1. This catalog is divided into two subsamples, i.e., the primary and secondary parts. The primary ∼264 million sources have either or both Gaia and SDSS astrometry, with a typical precision of 2.0–5.0 mas yr−1. In this part, ∼160 million sources have Gaia proper motions, and we provide another new proper motion for each of them by building a Bayesian model. Relative to Gaia's values, the precision is improved by ∼0.1 dex on average; ∼50 million sources are the objects whose proper motions are missing in Gaia DR2, and we provide their proper motions with a precision of ∼4.5 mas yr−1. The remaining ∼54 million faint sources are beyond Gaia detecting capability, and we provide their proper motions for the first time with a precision of 7.0 mas yr−1. However, the secondary ∼136 million sources only have PS1 astrometry, where the average precision is worse than 15.0 mas yr−1. The large uncertainty probably limits it to qualitative applications. All the proper motions have been validated using QSOs and the existing Gaia proper motions. The catalog will be available via the TAP Service in the German Astrophysical Virtual Observatory.