Bugs (Heteroptera) of treeless areas of Chukotka (Russia)

2021 ◽  
Vol 41 (1) ◽  
pp. 15-34
Author(s):  
Nikolay N. Vinokurov ◽  
Olga A. Khruleva
Keyword(s):  
Tundra Zone ◽  
New Materials ◽  
Apolygus Lucorum ◽  
Literary Sources ◽  
Distribution Features ◽  
First Time

The article summarizes the data on bugs in the treeless areas of the Chukotka Autonomous Okrug (tundra zone and the elfin wood subzone). Taking into account the available literary sources, as well as new materials (obtained in 2010s), 62 species of Heteroptera from 41 genera and 12 families are known here; 18 species recorded for these landscapes for the first time and 11 — for the Chukotka AO as a whole. There are: Saldula fucicola (J. Sahlberg, 1970) (Saldidae), Acompocoris brevirostris Kerzhner, 1979 (Anthocoridae); Apolygus lucorum (Meyer-Dür, 1843), Leptopterna ferrugata (Linnaeus, 1758), Teratocoris saundersi Douglas et Scott, 1869, Plagiognathus obscuriceps (Stål, 1858), Plagiognathus pini Vinokurov, 1978, Psallus anticus (Reuter, 1876) (Miridae); Kleidocerys resedae (Panzer, 1797) (Lygaeidae); Aelia frigida Kiritshenko, 1926, Rhacognathus punctatus (Linnaeus, 1758) (Pentatomidae). The number of known Heteroptera species for the tundra region of Chukotka increased from 39 to 51; for the elfin wood subzone — from 10 to 32 species. Some distribution features of bug species within zonal and climatic gradients of Chukotka are revealed.

The Sayan borderlands: Tuva’s ethnocultural landscapes in changing natural and sociocultural environments

2020 ◽  
Vol 13 (1) ◽  
pp. 29-36
Author(s):  
D. A. Dirin ◽  
Paul Fryer
Keyword(s):  
Cultural Landscapes ◽  
Field Studies ◽  
Social Environments ◽  
Key Factors ◽  
Role Of Government ◽  
Literary Sources ◽  
Population Migrations ◽  
The Republic ◽  
Sociocultural Processes ◽  
First Time

The paper is devoted to ethno-cultural landscapes of the Republic of Tuva. Ethnocultural landscapes (ECLs) are specific socio-environmental systems that developed as a result of the interaction of ethnic groups with their natural and social environments and are in a constant process of transformation. An attempt is made to identify the mechanisms of the formation, functioning and dynamics of ethnocultural landscapes in the specific conditions of the intracontinental cross-border mountain region, as well as to establish the main factors-catalysts of their modern changes. For the first time an attempt is made to delimit and map the ethnocultural landscapes of Tuva. For this, literary sources, statistical data and thematic maps of different times are analyzed using geoinformation methods. The results of 2014-2018 field studies are also used, during which interviews with representatives of different ethno-territorial, gender, age and social groups were taken. It is revealed that the key factors of Tuva’s ethnocultural landscape genesis are the natural isolation of its territory; the features of its landscape structure; the role of government; population migrations from other regions and the cultural diffusion provoked by them. 13 ethnocultural landscapes are identified at the regional level. Their modern transformation is determined by the shift of climatic cycles, aridisation, globalisation of sociocultural processes, changes in economic specialisation and ethnopsychological stereotypes.

Possible Causes in Breaking of Dental Implants Research

2017 ◽  
Vol 907 ◽  
pp. 104-118
Author(s):  
Maria Stoicănescu ◽  
Eliza Buzamet ◽  
Dragos Vladimir Budei ◽  
Valentin Craciun ◽  
Roxana Budei ◽  
...  
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Scientific Literature ◽  
Surface Characteristics ◽  
Raw Material ◽  
New Materials ◽  
Materials Used ◽  
Type Of Failure ◽  
First Time ◽  
Consequent Increase

Dental implants are becoming increasingly used in current dental practice. This increased demand has motivated manufacturers to develop varieties of product through design, but also looking for new materials used to improve surface characteristics in order to obtain a better osseointegration. But the increase in the use of implants goes to a consequent increase in the number of failures. These failures are caused either by treatment complications (peri-implantitis), by fatigue breakage under mechanical over-stress, by defective raw material, or due to errors during the insertion procedures. Although they are rare, these complications are serious in dentistry. Before to market a dental implant to clinical practitioners, the product is validated among other determinations in number of biocompatibility research. Raw material issues, details about its structure and properties are less published by the scientific literature, but all this are subject of a carefully analysis of the producers. Breaking of dental implants during surgical procedures, during the prosthetic procedures or during use (chewing, bruxism, accidents, etc.), is the second most common cause of loss of an implant after consecutive peri-implantitis rejection. Although the frequency of this type of failure for a dental implant is much smaller than those caused by the peri-implantitis, a detailed study of broken implants can explain possible causes. The use of scanning electron microscopy (SEM) in the study of the cleave areas explain the production mechanism of cleavages, starting from micro-fissures in the alloy used for the production of dental implants. These micro-fissures in weak areas of the implant (anti-rotational corners of the polygons, etc.) could generate a serious risk of cleavage first time when a higher force is applied.

Orientation Specific Thermal Properties of Polyimide Film

2000 ◽  
Vol 123 (3) ◽  
pp. 273-277 ◽  
Author(s):  
Robert J. Samuels ◽  
Nancy E. Mathis
Keyword(s):  
Thermal Conductivity ◽  
Heat Dissipation ◽  
Polyimide Film ◽  
New Materials ◽  
Polyimide Films ◽  
Nondestructive Technique ◽  
Theoretical Understanding ◽  
First Time ◽  
The Relationship ◽  
Transfer Mechanisms

The present study examines the relationship between thermal conductivity and planarity in polyimide films. The samples tested were specially prepared to range in orientation from three dimensionally random to highly planar. The molecular structure and orientation of the polyimide film have been characterized by polarizing microscope techniques, while the thermal conductivity measurements were done using a new rapid nondestructive technique. This correlation represents the first time thermal conductivity has been measured by modified hot wire techniques and related to the internal structure of polyimide. This work contributes to a deeper theoretical understanding of thermal conductivity and heat transfer mechanisms as they relate to orientation. Thermal conductivity evaluation could provide a new tool in the arsenal of structural characterization techniques. This relationship between thermal conductivity and orientation is key for applications of directional heat dissipation in the passive layers of chip assemblies. Such a correlation has potential to speed the development cycles of new materials during formulation as well as assure properties during production.

scholarly journals Ivan Aleksandăr (1331-1371)

2010 ◽  
Author(s):  
Alberto Alberti
Keyword(s):  
Fourteenth Century ◽  
Cultural Production ◽  
Cultural Evolution ◽  
Crucial Importance ◽  
Amount Of Information ◽  
The Arts ◽  
Literary Sources ◽  
Military Campaigns ◽  
First Time

The long reign of Ivan Aleksandăr (1331-1371), the penultimate emperor of Bulgaria prior to the Turkish conquest, was marked by a series of successful military campaigns against Serbia and Byzantium and above all by an intensive cultural production, largely fostered and funded by the sovereign himself. The central decades of the fourteenth century were of crucial importance for the later cultural evolution of Bulgaria and the whole of Orthodox Slovenia, despite which to date ample and exhaustive studies on the figure of Ivan Aleksandăr are lacking. There is, in effect, a considerable amount of information at disposal, although it is scattered over the literary sources, the colophons of the manuscripts, the epigraphic documentation and also, obviously, the official deeds promulgated by the Emperor. Through the analysis of this varied documentation, this book attempts to reconstruct the figure of the sovereign, the context in which he lived and worked, his greatness and his mistakes and his parallel activities as a strategist and an illuminated patron of the arts. For the first time, the Italian reader can find collected and translated all the manuscript sources relating to the Bulgarian sovereign. The book is completed by an appendix with the original texts of the Slavonic-ecclesiastical tradition.

scholarly journals A.S. Pushkin’s Works in the Graphics of M.V. Dobuzhinsky

2018 ◽  
Vol 15 (5) ◽  
pp. 584-591 ◽  
Author(s):  
Anna E. Zavyalova
Keyword(s):  
Complex Analysis ◽  
Formal Analysis ◽  
Fine Arts ◽  
Source Analysis ◽  
Russian Art ◽  
Literary Sources ◽  
Street Lamp ◽  
The 19Th Century ◽  
First Time ◽  
Graphic Solution

The article introduces into scientific discourse, and examines a number of M.V. Dobuzhinsky’s works: it traces the process of working on them, identifies their sources (literary and visual), analyzes the stylistic features and the specifics of the graphic techniques. These tasks are performed within the context of interaction between literature and fine arts. This topic is relevant because M.V. Dobuzhinsky’s illustrations to the stories “Stationmaster” and “Squire’s Daughter”, the play “Covetous Knight”, and the poem “Magnificent City, Poor City...” by A.S. Pushkin are studied as works of fine art for the first time.The scientific novelty of the article lies in the fact that it introduces an experience of defining the stylistic affiliation of the said works, and reveals a number of their visual sources. The author uses the method of complex analysis, combining the source analysis of M. Dobuzhinsky’s memoirs and his letters, the works of the artist’s contemporaries devoted to the Russian art of the beginning of the 20th century, and the traditional formal analysis of his works in comparison with those of Rembrandt, A. Benois, A. Dürer, F. Tolstoy, Japanese engravings of the 18th — beginning of the 19th century. This allows a significant expansion of existing ideas about visual and literary sources of the artist’s works.The article reveals that Rembrandt’s etching “View of Amsterdam from the Northwest” influenced the artistic solution of the illustration “In the Carriage” for the story “Stationmaster”; Hiroshige’s sheets influenced the illustration “Vyrin at the Entrance of Minsky’s House” for the same story. A. Dürer’s woodcuts influenced the solution of the illustration “Scene 1” for the play “Covetous Knight”; F. Tolstoy’s silhouettes influenced the vignettes and the artistic solution of the illustrations and decorations for the story “Squire’s Daughter”. The article also finds that H.Ch. Andersen’s tales “The Old House” and “The Old Street Lamp” had predetermined M. Dobuzhinsky’s appeal to the story “Stationmaster”, and the graphic solution of St. Petersburg in the picture “View of the St. Petersburg House”. The author concludes that M. Dobuzhinsky’s illustrating of Pushkin’s works was in line with his intense creative experiments: searching for a new solution to the image of St. Petersburg in book graphics, rethinking and “quoting” the masters of the past.

Printers to Hendrik Niclaes: Plantin and Augustijn van Hasselt

Quaerendo ◽  
1984 ◽  
Vol 14 (4) ◽  
pp. 247-272 ◽  
Author(s):  
Paul Valkema Blouw
Keyword(s):  
The Other ◽  
Literary Sources ◽  
The Family ◽  
Religious Sect ◽  
Set Up ◽  
Number Of Publications ◽  
First Time ◽  
New Evidence ◽  
Publishing Business

AbstractFrom the chronicles of the Family of Love we know that, besides printers in Deventer and later in Cologne, both Plantin and Augustijn van Hasselt printed for this religious sect. On the basis of this information quite a large number of publications have hitherto been attributed to Plantin, while only one single edition in Latin was reckoned to be the work of Augustijn. An analysis of the typography, however, shows that apart from Hendrik Niclaes's chief work, Den Spegel der Gherechticheyt, Plantin only printed two of his minor writings and that all the other ascriptions to Plantin must be revised in favour of Augustijn van Hasselt. In 1561-2 Augustijn was running a printing shop in the Dutch town of Kampen, specially set up by HN for the purpose of publishing those of his works that had not previously been printed. Plantin, who was partly involved in this enterprise, took the opportunity to have a book printed on this press for his publishing business. The analysis providing the typographical evidence of this collaboration proves for the first time the accuracy of the literary sources as regards Plantin's involvement in the publication of the works of Hendrik Niclaes. In the presentation of the new evidence it was necessary to establish more clearly the date of Plantin's '[1561]' inventory and which roman and German types he owned at what times. The article ends with some notes regarding the end of the 'Bohmbargen' press at Cologne.

scholarly journals Novel AM60-SiO2 Nanocomposite Produced via Ultrasound-Assisted Casting; Production and Characterization

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3976 ◽  
Author(s):  
Farzan Barati ◽  
Mojtaba Latifi ◽  
Ehsan Moayeri far ◽  
Mohammad Hossein Mosallanejad ◽  
Abdollah Saboori
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Shear Fracture ◽  
Sio2 Nanoparticles ◽  
New Materials ◽  
Casting Method ◽  
Ultrasound Assisted ◽  
First Time ◽  
Casting Production ◽  
Composite Samples

There has been growing interest in developing new materials with higher strength-to-weight ratios. Therefore, AM60 magnesium alloy reinforced with SiO2 nanoparticles was synthesized using ultrasound-casting method for the first time, in this study. We introduced 1 and 2 wt.% of SiO2 nanoparticles into the samples. Introduction of nanoparticles led to the grain size drop in MS2 (AM60 + 2 wt.% SiO2) samples. In addition, this increased the hardness of samples from 34.8 Vickers hardness (HV) in M (AM60) to 51.5 HV in MS2, and increased the compressive strength of MS2. Improvement of the mechanical properties can be attributed to a combination of Orowan, Hall–Petch and load-bearing mechanisms. However, ductility of the composites decreased with fracture strains being 0.41, 0.39 and 0.37, respectively, for samples M, MS1 and MS2. Fracture surfaces showed shear fracture in both composite samples with microcracks and a more brittle fracture in MS2.

Designing Lightweight Tensegrity-Based Structures and Materials of Tailorable Thermal Expansion

2019 ◽  
Author(s):  
Rochelle E. Silverman ◽  
Edwin A. Peraza Hernandez
Keyword(s):  
Thermal Expansion ◽  
Thermal Stresses ◽  
Low Complexity ◽  
Aerospace Engineering ◽  
Positive Zero ◽  
Large Temperature ◽  
New Materials ◽  
Temperature Changes ◽  
Wide Range ◽  
First Time

Abstract In this work, we analyze and design structures and materials that possess custom thermal expansion. These structures and materials are composed of a base unit inspired by the tensegrity “D-bar” (or double-pyramid) topology. We derive, for the first time, analytical equations for the linearized and geometrically exact coefficients of thermal expansion (CTEs) of bi-material D-bar structures with arbitrary shape and complexity. Numerical results obtained using the geometrically exact CTE equations are compared with results obtained using the linearized CTE equations, showing that the latter are accurate only in cases where temperature changes are small. Further results show that D-bar structures of low complexity can produce a wide range of CTEs, including positive, zero, and negative values. These CTE values are exhibited for a range of materials that allows for easy manufacturing (materials with CTE ratios as low as 2). Thus, it is concluded that D-bar structures show promise for applications in aerospace engineering and other fields where new materials of tailorable thermal expansion are needed to decrease the substantial thermal stresses caused by large temperature changes.

First record of the dobsonfly genus Protohermes van der Weele, 1907 from Pakistan (Megaloptera: Corydalidae)

Zootaxa ◽  
2020 ◽  
Vol 4732 (3) ◽  
pp. 422-434 ◽  
Author(s):  
MUHAMMAD ASGHAR HASSAN ◽  
FUMIO HAYASHI ◽  
XINGYUE LIU
Keyword(s):  
First Record ◽  
New Materials ◽  
First Time

The dobsonfly genus Protohermes van der Weele, 1907 is recorded from Pakistan for the first time. Two species, i.e. Protohermes motuoensis Liu & Yang, 2006 and Protohermes walkeri Navás, 1929 are herein re-described based on new materials from Pakistan. 

scholarly journals Ethnic maps of Ukrainian lands in works of Ukrainian and Russian scientists of the second half of XIX century

2019 ◽  
Vol 53 ◽  
pp. 3-12
Author(s):  
Andriy Baitsar
Keyword(s):  
Nineteenth Century ◽  
Key Words ◽  
Early Nineteenth Century ◽  
Geographical Research ◽  
Ethnographic Studies ◽  
Literary Sources ◽  
History Of ◽  
Ethnic Mapping ◽  
Xix Century ◽  
First Time

The study considered the development of ideas about the limits of settling the Ukrainian people in connection with the compilation of ethnographical map of the Austrian and Russian monarchies, since the 40s of XIX century. The views of Ukrainian and Russian researchers who have studied this issue during different periods are analysed. In the manuscript “Geography of Ptolemy” in 1420 (the author is unknown), the map “Sarmatia” (Sarmatias) (the name of the map is conditional) Ukrainian lands were depicted for the first time and for the first time the map contained the inscription “Sarmatia”. Nicolaus Hermanus, who revised the content of “Geography” by Claudius Ptolemy (Cosmographia Claudii Ptolomaei Alexandrini Manuscript, 1467), first placed the name “European Sarmatia” (Sarmatia Єvropє) on the handwritten map of 1467. In the second (the first one with maps) Bologna edition 1477 (26 maps) of Claudia Ptolemy's “Geography” also contained a map of “European Sarmatia”. In the next Roman edition (1478) the Eighth Map of Europe (Octava Europe Tabula) and the Second Map of Asia (Secunda Asiae Tabula) are contained, which the Ukrainian lands are depicted in. Based on a detailed study and analysis of cartographic sources, summarizing the results of ethnographic, historical and geographical research of Ukrainian ethnic territory tracked changes in the boundaries of settling the Ukrainian ethnos. In the early nineteenth century in many European countries, regular population censuses had been introduced and ethnographic studies related to the Ukrainian national revival had been intensified. It created objective prerequisites for the beginning of ethnic mapping in the 1920s and became possible to map the composition of the population in detail, literally by settlements, to determine the absolute and relative share of a particular nationality in a certain territory. The main cartographic works of Ukrainian and Russian scientists, which depict the Ukrainian ethnic territory, are chronologically highlighted. Many ethnic maps have been described. On the basis of elaboration of a considerable number of cartographic and literary sources, the history of ethnographic mapping of the territory of Ukrainian settlements is chronologically covered. Key words: ethnographic researching, map, Ukrainian lands, ethnos.

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