Discrete Kinematic Geometry in Testing Axes of Rotation of Spindles

2016 ◽  
Author(s):  
Delun Wang ◽  
Zhi Wang ◽  
Yu Wu ◽  
Huimin Dong ◽  
Shudong Yu
Keyword(s):  
Geometry Model ◽  
Displacement Sensors ◽  
Characteristic Lines ◽  
Kinematic Geometry ◽  
Fixed Axis ◽  
Global Invariants ◽  
New Perspective ◽  
Line Trajectory ◽  
Error Motion ◽  
First Time

The accuracy of actual motion of the spindle of a machine tool, a key performance index, is measured at a series of positions, and evaluated using a discrete kinematic geometry model. The kinematic geometry model, or more precisely a novel mechanism, is presented for the first time in this paper and validated using an apparatus consisting of a spindle, an artifact with double master ball and five displacement sensors as per ASME codes and standards [1]. The six kinematic parameters of the spindle with a single rotor — three translations and three rotations are obtained using the novel mechanism and the measurements. The theory of discrete kinematic geometry is employed to reveal the intrinsic properties of the trajectories traced by the characteristic lines of the rotor. In order to avoid the influences caused by the locations and directions of the measuring coordinate systems, the invariants of a discrete line-trajectory, particularly the spherical image curve and the striction curve [2], are introduced to deal with the discrete measurements. The global invariants, the approximated moving axis and the approximated fixed axis of the rotor in the error motion, independent of the assembling position of the double master balls on the rotor, are proposed to evaluate the rotational accuracy of spindles. The discrete kinematic geometry provides a new perspective and a theoretical base for assessing the accuracy of the spindle motion.

Competition of Verb Aspects and Its Resolution as a Creative Act (Based on the Material of Aspects Variants in the Texts by F. M. Dostoevsky)

2020 ◽  
Vol 81 (2) ◽  
pp. 56-63
Author(s):  
S. A. Karpukhin
Keyword(s):  
Traditional Method ◽  
Contextual Analysis ◽  
Verb Aspect ◽  
Component Theory ◽  
Two Component ◽  
Artistic Interpretation ◽  
New Perspective ◽  
First Time ◽  
Selection Of ◽  
Aspectual Meaning

The article considers the competition of verbal aspects from a new perspective. Instead of employing the traditional method of demonstrating this phenomenon — an empirical replacement of the aspect of a verb in a phrase with the opposite — the author examines Dostoevsky’s choice between the variants found in different manuscripts of the same text. For the first time, based on a two-component theory of the semantic invariant of a verb type, the aspectual meaning of the selection of a verb aspect is revealed and, as a result of contextual analysis, an artistic interpretation of the selected type is proposed.

scholarly journals Sicily Before the Greeks. The Interaction with Aegean and the Levant in the Pre-colonial Era

2020 ◽  
Vol 6 (1) ◽  
pp. 172-205
Author(s):  
Davide Tanasi
Keyword(s):  
Material Culture ◽  
Complex Dynamics ◽  
Eastern Mediterranean ◽  
Colonial Era ◽  
Local Material ◽  
Gradual Process ◽  
Multiple Variables ◽  
New Perspective ◽  
First Time ◽  
The Relationship

AbstractThe relationship between Sicily and the eastern Mediterranean – namely Aegean, Cyprus and the Levant – represents one of the most intriguing facets of the prehistory of the island. The frequent and periodical contact with foreign cultures were a trigger for a gradual process of socio-political evolution of the indigenous community. Such relationship, already in inception during the Neolithic and the Copper Age, grew into a cultural phenomenon ruled by complex dynamics and multiple variables that ranged from the Mid-3rd to the end of the 2nd millennium BCE. In over 1,500 years, a very large quantity of Aegean and Levantine type materials have been identified in Sicily alongside with example of unusual local material culture traditionally interpreted as resulting from external influence. To summarize all the evidence during such long period and critically address it in order to attempt historical reconstructions is a Herculean labor.Twenty years after Sebastiano Tusa embraced this challenge for the first time, this paper takes stock on two decades of new discoveries and research reassessing a vast amount of literature, mostly published in Italian and in regional journals, while also address the outcomes of new archaeometric studies. The in-depth survey offers a new perspective of general trends in this East-West relationship which conditioned the subsequent events of the Greek and Phoenician colonization of Sicily.

scholarly journals ON THE STUDY OF THE MANUFACTURING TECHNIQUES DEALS WITH THE CERAMICS OF THE MAIKOP- NOVOSVOBODNAYA COMMUNITY BY THE METHOD OF. A. A. BOBRINSKY AND NEW EXPERIMENTS

2015 ◽  
Vol 4 (4) ◽  
pp. 59-71
Author(s):  
Sergey Nikolaevich Korenevskiy ◽  
Andrey Sergeevich Kizilov
Keyword(s):  
Surface Treatment ◽  
Raw Materials ◽  
Flat Bottom ◽  
Axis Of Rotation ◽  
Fixed Axis ◽  
Manufacturing Techniques ◽  
First Time

The article presents a brief synthesis of the results deal with the study of ceramics Maikop-novosvobodnaya community using the method of a. a. Bobrinsky and use of the microscope with 12 times magnification. it sets out ideas about raw materials, methods of construction, surface treatment. especially emphasized the problem of the use by the ancient potters of rotary devices. For the first time about such vessels were noted in the work of a. a. Bobrinsky and r. M. Munchaev in 1966, for example, vessels with a flat bottom. at present a series of examples of traces deal with use of rotary devices has expanded. in the article by a. s. Kizilov shows the simulation of the vessel of the Maikop culture and fixation of the traces of its turn without a fixed axis of rotation and with a non-fixed environment of rotation. as a result, the actual doing of those and other traces that prove the use of Maikop potters rotary devices with a fixed axis of rotation in the manufacture of vessels not only flat, but round bottom too.

The Handbook of Language Assessment Across Modalities

2021 ◽  
Keyword(s):  
Second Language ◽  
Language Assessment ◽  
Spoken Language ◽  
Assessment Literacy ◽  
Signed Language ◽  
Key Issues ◽  
Relevant Field ◽  
The Common ◽  
New Perspective ◽  
First Time

In Language Assessment Across Modalities: Paired-Papers on Signed and Spoken Language Assessment, volume editors Tobias Haug, Wolfgang Mann, and Ute Knoch bring together—for the first time—researchers, clinicians, and practitioners from two different fields: signed language and spoken language. The volume examines theoretical and practical issues related to 12 topics ranging from test development and language assessment of bi-/multilingual learners to construct issues of second-language assessment (including the Common European Framework of Reference [CEFR]) and language assessment literacy in second-language assessment contexts. Each topic is addressed separately for spoken and signed language by experts from the relevant field. This is followed by a joint discussion in which the chapter authors highlight key issues in each field and their possible implications for the other field. What makes this volume unique is that it is the first of its kind to bring experts from signed and spoken language assessment to the same table. The dialogues that result from this collaboration not only help to establish a shared appreciation and understanding of challenges experienced in the new field of signed language assessment but also breathes new life into and provides a new perspective on some of the issues that have occupied the field of spoken language assessment for decades. It is hoped that this will open the door to new and exciting cross-disciplinary collaborations.

A Material History of the Bible, England 1200-1553

2020 ◽  
Author(s):  
Eyal Poleg
Keyword(s):  
Careful Analysis ◽  
Late Medieval ◽  
Religious Transformation ◽  
The Bible ◽  
Lay Women ◽  
History Of ◽  
Material History ◽  
New Perspective ◽  
Political Turmoil ◽  
First Time

This book examines the production and use of Bibles in late medieval and early modern England. The analysis of hundreds of biblical manuscripts and prints reveals how scribes, printers, readers, and patrons have reacted to religious and political turmoil. Looking at the modification of biblical manuscripts, or the changes introduced into subsequent printed editions, reveals the ways in which commerce and devotions joined to shape biblical access. The book explores the period from c.1200 to 1553, which saw the advent of moveable-type print as well as the Reformation. The book’s long-view places both technological and religious transformation in a new perspective. The book progresses chronologically, starting with the mass-produced innovative Late Medieval Bible, which has often been linked to the emerging universities and book-trade of the thirteenth century. The second chapter explores Wycliffite Bibles, arguing against their common affiliation with groups outside Church orthodoxy. Rather, it demonstrates how surviving manuscripts are linked to licit worship, performed in smaller monastic houses, by nuns and devout lay women and men. The third chapter explores the creation and use of the first Bible printed in England as evidence for the uncertain course of reform at the end of Henry VIII’s reign. Henry VIII’s Great Bible is studied in the following chapter. Rather than a monument to reform, a careful analysis of its materiality and use reveals it to have been a mostly useless book. The final chapter presents the short reign of Edward VI as a period of rapid transformation in Bible and worship, when some of the innovations introduced more than three hundred years earlier began, for the first time, to make sense.

Japanese and the mainland dialects

2020 ◽  
pp. 163-195
Author(s):  
Masayoshi Shibatani
Keyword(s):  
Case Particles ◽  
Old Japanese ◽  
Eastern Old Japanese ◽  
Salient Features ◽  
New Perspective ◽  
First Time

After a brief discussion on the relationships between modern mainland dialects with the two varieties of Old Japanese, Central Old Japanese and Eastern Old Japanese, the salient features of Standard Japanese are described from the new perspective of grammatical nominalizations. Then cross-dialectal studies are presented on selected topics, centering on case particles and the conclusive/adnominal verbal patterns. Also presented for the first time in English is a reasonably detailed description of the isolated dialect of Hachijō Island, which, like Ryūkyūan, retains many archaic features of Old Japanese.

Generalized Two-Point Method for Straightness Profile Measurement - Error Propagation and Experimental Results

2014 ◽  
Vol 939 ◽  
pp. 600-606 ◽  
Author(s):  
Eiki Okuyama ◽  
Shingo Asano ◽  
Yuichi Suzuki ◽  
Hiromi Ishikawa
Keyword(s):  
Random Error ◽  
Error Propagation ◽  
Point Method ◽  
Experimental Results ◽  
Displacement Sensor ◽  
Profile Measurement ◽  
Parasitic Motion ◽  
Displacement Sensors ◽  
Straightness Error ◽  
Error Motion

In the straightness profile measurement of a mechanical workpiece, hardware datums have been the traditional standard. However, when the straightness profile is measured using a scanning displacement sensor set on an X-stage as the hardware datums, output of a displacement sensor includes the signal of straightness profile and the sensor’s parasitic motion, i.e. straightness error motion. Then, error separation techniques of the straightness profile from parasitic motions have been developed. For example, two-point method uses two displacement sensors and separates the sensor’s straightness error motion from the straightness profile. However, the conventional two-point method cannot measure a large-scale workpiece because the large sampling number causes random error amplification. In this article, the influence of the random error of generalized two-point method is shown. As the result of the theoretical analysis and numerical analysis, random error propagation decrease when sampling number increase. Further, experimental results obtained by generalized two-point method with large sampling number are analyzed using Wavelet transform and influence of error of the generalized two-point method is discussed in the space-spatial frequency domain.

scholarly journals A Boltzmann-Tsallis approach towards cell survival curve in Radiobiology

2019 ◽  
Vol 206 ◽  
pp. 09014
Author(s):  
B.W.Q. Tan ◽  
H.Q. Tan ◽  
A.H. Chan
Keyword(s):  
Statistical Mechanics ◽  
Cell Survival ◽  
Survival Curve ◽  
Phenomenological Approach ◽  
Physical Parameters ◽  
Chain Model ◽  
Nonextensive Statistical Mechanics ◽  
Cell Survival Curve ◽  
New Perspective ◽  
First Time

This paper outlines a phenomenological approach towards cell survival curve at low dose using tools of extensive Statistical Mechanics and nonextensive Statistical Mechanics. An Ising chain model is developed for the cell survival curve and the canonical ensemble formalism based on Boltzmann Gibbs statistic and Tsallis statistic is presented. The resulting cell survival curve shows excellent agreement with the experimental data and the physical parameters from our Tsallis model (N’, q) can be shown to provide clear classification between healthy and cancerous cells. In this paper, we also provides possible biophysical interpretation to the (N’, q) parameters where N’ is representative of the amount of repairable DNA content in the nucleus and q represents the degree of correlation in DNA damage. Overall, this is the first time a Statistical Mechanics approach is used in Radiobiology, and could present a new perspective.

No Silver Medal for Nobel Prize Contenders

2016 ◽  
Vol 125 (1) ◽  
pp. 34-38 ◽  
Author(s):  
Nils Hansson ◽  
Heiner Fangerau ◽  
Annette Tuffs ◽  
Igor J. Polianski
Keyword(s):  
20Th Century ◽  
Nobel Prize ◽  
Medical Literature ◽  
Early 20Th Century ◽  
Nobel Committee ◽  
History Of ◽  
Silver Medal ◽  
New Perspective ◽  
First Time ◽  
Carl Koller

Abstract Taking the examples of the pioneers Carl Ludwig Schleich, Carl Koller, and Heinrich Braun, this article provides a first exploratory account of the history of anesthesiology and the Nobel Prize for physiology or medicine. Besides the files collected at the Nobel Archive in Sweden, which are presented here for the first time, this article is based on medical literature of the early 20th century. Using Nobel Prize nominations and Nobel committee reports as points of departure, the authors discuss why no anesthesia pioneer has received this coveted trophy. These documents offer a new perspective to explore and to better understand aspects of the history of anesthesiology in the first half of the 20th century.

scholarly journals Trabeculae and Al-accumulation in the wood cells of Melastomataceae species from Brazilian savanna

Botany ◽  
2017 ◽  
Vol 95 (5) ◽  
pp. 521-530
Author(s):  
Camilla Rozindo Dias Milanez ◽  
Carmen Regina Marcati ◽  
Silvia Rodrigues Machado
Keyword(s):  
Wood Anatomy ◽  
Gelatinous Fibers ◽  
Vessel Elements ◽  
Ray Cells ◽  
Gelatinous Fiber ◽  
The Common ◽  
New Perspective ◽  
Perforation Plates ◽  
First Time ◽  
Additional Role

Family Melastomataceae is an important component of the Brazilian Cerrado flora, inhabiting different environments from those with well-drained soils to swamp soil sites. Several members of this family are recognized as aluminum (Al)-accumulating. We studied the wood anatomy of six species of Melastomataceae (Miconia albicans (Sw.) Triana, M. fallax DC., M. chamissois Naudin, M. ligustroides (DC.) Naudin, Microlepis oleaefolia (DC.) Triana, Rhynchanthera dichotoma DC.), growing in different environments of Cerrado, exploring the occurrence of trabeculae and Al-accumulation sites. We processed the material following the usual techniques in wood anatomy and histochemistry. We used a chrome azurol-S spot-test in fresh material to detect Al-accumulation. The common features were diffuse porosity, vessel elements with simple perforation plates and vestured pits, abundant parenchyma-like fiber bands and septate fibers, axial parenchyma scanty to vasicentric, and heterocellular rays. The presence of trabeculae in vessel elements, septa in parenchyma cells, and aluminum in the G-layer of the gelatinous fiber walls, in the septa of fibers, in cambial initials and derivatives cell walls, and in the vacuole of ray cells are recorded for the first time for Melastomataceae. The results of this study indicate an additional role for gelatinous fibers in Al-accumulation, and offer a new perspective on Al-compartmentalization in the wood cells from Cerrado species.

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