The Grid: As a Starting Point and an End Point of Ornament

2017 ◽  
pp. 209-218
Author(s):  
Satu Kähkönen
Keyword(s):  
End Point ◽  
Starting Point

scholarly journals Method for determining the kinematic parameters of the vertical rotor blades for the destruction of the tuberous layer

2020 ◽  
pp. 82-90
Author(s):  
V. A. Volsky V. A. ◽  
V. S. Bonchik
Keyword(s):  
Hydraulic Drive ◽  
Extreme Points ◽  
Geometric Shape ◽  
Kinematic Parameters ◽  
End Points ◽  
End Point ◽  
Vertical Rotor ◽  
Starting Point ◽  
The Absolute ◽  
Angle Of Rotation

Annotation Purpose. Development of a technique for determining the velocities of collision of the blades with the tuberous layer, the trajectory of movement, the magnitude and direction of the velocities of the most characteristic points. Methods. The research was carried out using the basic provisions of theoretical mechanics, statistics, probability theory, methods of differential calculations, mathematical modeling and applied programming. The studies were carried out on a specially designed laboratory installation using a vertical rotor hydraulic drive and strain gauge equipment mounted on a tractor, as well as a set of variable connecting plates for setting the machine operating modes. Results. The calculations of the absolute collision velocities of the blades of the lower and upper beaters of the vertical rotor at the start and end points, respectively, are performed. The geometric shape of the working surfaces and the direction of rotation for the extreme points of the outer contours of the blades of the lower and upper beaters of the vertical rotor of the potato harvester are substantiated. Conclusions. Using the above technique, as well as graphical dependences, we calculated the rational kinematic parameters of the blades of the lower and upper beaters of the vertical rotor, respectively, at the start and end points, where the greatest destruction of the tuber layer. For the lower beater blade, the absolute collision speed at the angle of rotation ωнt = 120° at the starting point = 1.6 m/s, at the end point – = 1.94 m/s. For the upper beater blade, the absolute collision speed at the angle of rotation ωвt = 120° at the starting point = 1.4 m/s, at the end point – = 1.92 m/s. Therefore, according to the specified rational kinematic parameters of the blades of the lower and upper beaters of the vertical rotor, it is possible to design the geometric shape of the surfaces of the crushing working bodies of potato harvesters. Keywords: blade, breaking surface, breasts, potatoes.

Strategy in History and (versus?) in Economics: A Review of Lawrence Freedman's Strategy: A History

2014 ◽  
Vol 52 (4) ◽  
pp. 1119-1134 ◽  
Author(s):  
Avinash Dixit
Keyword(s):  
Critical Discussion ◽  
End Point ◽  
Practical Strategy ◽  
Starting Point ◽  
Business Politics ◽  
Game Theoretic

This essay reviews Lawrence Freedman's book Strategy: A History. The main themes—definitions, strategies in war, business, politics, and revolutions—are overviewed. The value of game-theoretic thinking for practical strategy is assessed. A critical discussion of some concepts and dichotomies emphasized by Freedman, e.g., strategy is governed by the starting point, not the end point, and of the role of stories and scripts in strategy, follows. (JEL A11, A12, C70, D74)

Interslice force functions for computing active and passive earth force

1999 ◽  
Vol 36 (6) ◽  
pp. 1015-1029 ◽  
Author(s):  
Noshin Zakerzadeh ◽  
D G Fredlund ◽  
D E Pufahl
Keyword(s):  
Slip Surface ◽  
Limit Equilibrium ◽  
Retaining Wall ◽  
Vertical Wall ◽  
Force Function ◽  
Classical Solutions ◽  
End Point ◽  
Starting Point ◽  
General Limit ◽  
Selection Of

Recent methods to calculate the lateral earth force on a retaining wall have involved the method of slices and limit equilibrium concepts. An important issue in formulating the solution is the selection of an appropriate interslice force function (i.e., the ratio of the shear force to the normal force of vertical slices along the slip surface). This paper proposes interslice force functions that can be used to compute the active and passive earth forces in conjunction with the limit equilibrium method. An example problem involving a vertical wall with a horizontal backslope is analyzed using the general limit equilibrium (GLE) method and the proposed interslice force functions. The procedure recommended to compute the lateral earth force and the point of application of the force is outlined. The computed lateral earth forces, and the point of application, are compared with those from the classical solutions. For the active case, reasonable results were obtained when using an interslice force function that varies linearly from the starting point of the slip surface (at some distance from the wall) to the end point of the slip surface (adjacent to the wall). For the passive case, reasonable results were obtained when using an interslice force function that remains at zero from the starting point of the slip surface (at some distance from the wall) to the midpoint of the slip surface and then varies linearly from the midpoint of the slip surface to the end point of the slip surface (adjacent to the wall).

Accidental conical intersections in H2Cl+(1A′)

1994 ◽  
Vol 72 (3) ◽  
pp. 939-946 ◽  
Author(s):  
Philip J. Kuntz ◽  
W. Neil Whitton ◽  
Ivana Paidarová ◽  
Rudolf Polák
Keyword(s):  
Hessian Matrix ◽  
Valence Bond ◽  
Asymptotic Region ◽  
Hamiltonian Matrix ◽  
Conical Intersections ◽  
End Point ◽  
Starting Point ◽  
Model Hamiltonian ◽  
Second Derivatives ◽  
Linear Configuration

Conical intersections in Cs, C2v, and linear configurations for the 1A′ states of the H2Cl+ molecule are investigated with the help of a 10 × 10 model Hamiltonian matrix in a valence-bond basis. The line of intersection (linea) between states 2 and 3 is traced from one end point, an intersection between two states of 1B2 symmetry in a C2V configuration, to the other end point, an intersection between two 1Σ+ states in a linear H—H—Cl configuration. The linea consists of 5 branches having symmetries Cs, Cs, C∞v, C2v, and Cs. A linea between states 3 and 4 starting at a crossing of 1Σ+ and 1Π states in a linear C∞v configuration consists of three branches (Cs, C2V, Cs) leading to the asymptotic region Cl + H2. The starting point of linea 3/4 is connected to the asymptotic region H + HCl via a linea in the linear configuration. Lineae of Cs symmetry could be found by examining the eigenvalues of the Hessian matrix of second derivatives along a line of intersection in a higher symmetry (C2v or linear), a useful method for locating accidental intersections that lends itself readily to ab initio calculations. The existence of the lineae could be related to physical properties of the molecule, such as the dipole moment, indicating that the model Hamiltonian does reflect the true physical behaviour.

scholarly journals Research on Characteristics and Trends of Traffic Flow Based on Mixed Velocity Method and Background Difference Method

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Huimin Ge ◽  
Hui Sun ◽  
Ying Lu
Keyword(s):  
Traffic Flow ◽  
Transition Zone ◽  
Difference Method ◽  
Work Zone ◽  
Highway Maintenance ◽  
Working Zone ◽  
End Point ◽  
Starting Point ◽  
Maintenance Work ◽  
Background Difference

This research is conducted on the characters and trends of traffic flow in highway maintenance work areas under typical maintenance work forms. In order to improve the safety of the highway maintenance work area, a data monitoring method based on the combination of mixed speed measurement and background difference method were developed. During the on-site detection, the starting point of the warning zone, the starting point of the upstream transition zone, the starting point of the working zone, the midpoint of the working zone, and the six speed measurement sections of the working zone were collected at the end point and the end zone. In the video detection, the background subtraction was used, and the morphological denoting method and the connected domain analysis method were used to retain the vehicle foreground. After analyzing the connection domain and removing the wrong target, the vehicle target area is extracted from research. The research finally obtained the traffic flow characteristics of the start point of the warning zone, the start point of the upstream transition zone, the start point of the work zone, the midpoint of the work zone, the end point of the work zone, and the end point of the downstream transition zone. The study also obtained the traffic volume and the change trend of headway. The combination of mixed velocity method and background difference method is helpful for data monitoring in typical highway maintenance work areas. The measured data results are helpful for studying the distribution characteristics and trends of traffic flow in typical highway maintenance work areas.

The source and the structure of Homer's epic poetry

2004 ◽  
Vol 12 (4) ◽  
pp. 527-542 ◽  
Author(s):  
CORNELIS J. RUIJGH
Keyword(s):  
19Th Century ◽  
Epic Poetry ◽  
Epic Tradition ◽  
End Point ◽  
Religious Festivals ◽  
Starting Point ◽  
Greek Epic ◽  
Epic Poems ◽  
Traditional Poetry ◽  
Greek World

Homer's Iliad and Odyssey were created, probably in the second half of the 9th century BC, in the framework of the Greek epic tradition of oral formulaic poetry, which started in the Peloponnese in proto-Mycenaean times (c. 1600 BC). The epic verse, the dactylic hexameter, must have been taken over from the Minoan Cretans. Whereas most 19th century scholars were analysts, considering Homer's epics' conflations of older and more recent epic poems, most modern scholars are unitarians, recognizing the unity of both epics, thanks to modern insights in the nature of oral traditional poetry and to modern narratology. Although many modern scholars ascribe the Odyssey to a later poet than that of the Iliad, there are no convincing arguments against the Ancients' opinion that both epics are the work of one single poet called Homer. Both Iliad and Odyssey are characterized by the principle of ‘unity of action’, a principle not found in other ancient epic poetry. There are reasons to suppose that Homer learnt the art of epic versification in Smyrna, his native city, by listening to performances of Aeolic singers. Driven by Ionic self-consciousness he transposed the epic Aeolic Kunstsprache into Ionic, thus creating the so-called Homeric dialect. He could perform his monumental epics at great religious festivals and at the courts of princes. There is evidence that he gave performances in the island of Euboea, the only prosperous region of the contemporary Greek world, and that there his epics were eventually written down. Thus, Homer's epics are the end-point of the oral epic tradition and the starting point of written Greek and European literature.

scholarly journals Multiplexed End-point Microfluidic Chemotaxis Assay using Centrifugal Alignment

2020 ◽  
Author(s):  
Sampath Satti ◽  
Pan Deng ◽  
Kerryn Matthews ◽  
Simon P. Duffy ◽  
Hongshen Ma
Keyword(s):  
Fluid Flow ◽  
Drug Testing ◽  
Time Lapse ◽  
Cell Alignment ◽  
Cell Geometry ◽  
End Point ◽  
Starting Point ◽  
Correct Location ◽  
Set Up ◽  
Time Lapse Imaging

AbstractA fundamental challenge to multiplexing microfluidic chemotaxis assays at scale is the requirement for time-lapse imaging to continuously track migrating cells. Drug testing and drug screening applications require the ability to perform hundreds of experiments in parallel, which is not feasible for assays that require continuous imaging. To address this limitation, end-point chemotaxis assays have been developed using fluid flow to align cells in traps or sieves prior to cell migration. However, these methods require precisely controlled fluid flow to transport cells to the correct location without undesirable mechanical stress, which introduce significant set up time and design complexity. Here, we describe a microfluidic device that eliminates the need for precise flow control by using centrifugation to align cells at a common starting point. A chemoattractant gradient is then formed using passive diffusion prior to chemotaxis in an incubated environment. This approach provides a simple and scalable approach to multiplexed chemotaxis assays. Centrifugal alignment is also insensitive to cell geometry, enabling this approach to be compatible with primary cell samples that are often heterogeneous. We demonstrate the capability of this approach by assessing chemotaxis of primary neutrophils in response to an fMLP (N-formyl-met-leu-phe) gradient. Our results show that cell alignment by centrifugation offers a potential avenue to develop scalable end-point multiplexed microfluidic chemotaxis assays.

scholarly journals Enumeration of S-Motzkin paths from left to right and from right to left: a kernel method approach

2020 ◽  
Vol 29 (1) ◽  
pp. 28-38
Author(s):  
Helmut Prodinger
Keyword(s):  
Kernel Method ◽  
End Point ◽  
Starting Point ◽  
Fixed End ◽  
Motzkin Paths ◽  
Method Approach

AbstractThe area of S-Motzkin paths (bijective to ternary trees) is calculated using the kernel method by enumerating these (partial) paths with fixed end-point resp. starting point.

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