scholarly journals Extensive and Intensive Globalizations: Explicating the Low Connectivity Puzzle of U.S. Cities Using a City-Dyad Analysis

2014 ◽  
Vol 36 (5) ◽  
pp. 876-890 ◽  
Author(s):  
Peter J. Taylor ◽  
Michael Hoyler ◽  
Kathy Pain ◽  
Sandra Vinciguerra
Keyword(s):  
Dyad Analysis

scholarly journals Mixed segregation of chromosomes during single-division meiosis of Saccharomyces cerevisiae.

Genetics ◽  
1990 ◽  
Vol 125 (3) ◽  
pp. 475-485
Author(s):  
G Sharon ◽  
G Simchen
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Meiotic Division ◽  
Chromosome Pair ◽  
Yeast Cells ◽  
Cell Divisions ◽  
Dyad Analysis ◽  
Normal Meiosis ◽  
Segregation Of Chromosomes

Abstract Normal meiosis consists of two consecutive cell divisions in which all the chromosomes behave in a concerted manner. Yeast cells homozygous for the mutation cdc5, however, may be directed through a single meiotic division of a novel type. Dyad analysis of a cdc5/cdc5 strain with centromere-linked markers on four different chromosomes has shown that, in these meioses, some chromosomes within a given cell segregate reductionally whereas others segregate equationally. The choice between the two types of segregation in these meioses is made individually by each chromosome pair. Different chromosome pairs exhibit different segregation tendencies. Similar results were obtained for cells homozygous for cdc14.

scholarly journals Different Perceptions of Parents and Children on Factors Influencing Sport Specialization

2020 ◽  
pp. 1-8
Author(s):  
Mayrena I. Hernandez ◽  
Kevin M. Biese ◽  
Dan A. Schaefer ◽  
Eric G. Post ◽  
David R. Bell ◽  
...  
Keyword(s):  
Health Care Providers ◽  
Care Providers ◽  
Cross Sectional ◽  
Youth Athletes ◽  
Risk Of Injury ◽  
Parents And Children ◽  
Increased Risk ◽  
Dyad Analysis ◽  
School Team ◽  
Level Of Agreement

Context: Sport specialization among youth athletes has been associated with increased risk of overuse injuries. Previous research demonstrates that children perceive specialization to be beneficial in making their high school team and receiving athletic college scholarships. Previous research demonstrates that parents play a significant role in their child’s sport experience. However, it is unknown if parents and children answer questions related to specialization factors in a similar manner. Objective: To evaluate the beliefs of youth athletes and parents on factors related to sport specialization and evaluate the level of agreement between dyads on sports specialization. Design: Cross-sectional. Setting: Online and paper surveys. Patients or Other Participants: Aim 1: 1998 participants (993 children and 1005 parents). Aim 2: 77 paired parent–child dyads. Interventions: Self-administered survey. Main Outcome Measures: The responses were summarized via frequency and proportions (%). Chi-squares were calculated between parent and child responses. Kappa coefficients were calculated for dyads to determine level of agreement. Sport specialization was classified using a common 3-point scale. Results: The parents were more concerned about risk of injury in sports compared with children (P < .001, χ2 = 231.4; parent: extremely: 7.1%; child: extremely: 3.7%). However, children were more likely to believe that specialization was associated with their chances of obtaining an athletic college scholarship compared with parents (P < .001, χ2 = 201.6; parent: very/extremely likely: 13.7%; child: very/extremely likely: 15.8%). Dyad subanalysis indicated a moderate level of agreement for “quitting other sports to focus on one sport” (κ = .50) and a low level of agreement for “identifying a primary sport” (κ = .30) and “training >8 months per year in primary sport” (κ = .32). Conclusions: Parents and youth athletes had differing beliefs on the factors related to sport specialization. Dyad analysis shows that parents and children answer sport specialization classification questions differently. Health care providers should be aware of these differences, and messaging should be individualized to the audience.

A Dyad Search Algorithm for Solving Planar Linkages Using the Dyad Method

1992 ◽  
Author(s):  
Lofti Romdhane
Keyword(s):  
Search Algorithm ◽  
Class Ii ◽  
Graph Representation ◽  
Step Size ◽  
Lower Pair ◽  
Fast Solution ◽  
Complete Automation ◽  
Newton Raphson ◽  
Dyad Analysis ◽  
Planar Linkages

Abstract Based on graph representation of planar linkages, a new algorithm was developed to identify the different dyads of a mechanism. A dyad or class II group, is composed of two binary links connected by either a revolute (1) or a slider (0) pair with provision for attachment to other links by lower pair connectors located at the end of each link. There are five types of dyads: the D111, D101, D011, D001, and D010. The dyad analysis of a mechanism is predicated on the ability to construct the system from one or more of the five binary structure groups or class II groups. If the mechanism is complicated and several dyads are involved, the task of identifying these dyads by inspection could be difficult and time consuming for the user. This algorithm allows a complete automation of this task. This algorithm is based on the Dijkstra’s algorithm, for finding the shortest path in a graph, and it is used to develop a computer program, called KAMEL: Kinematic Analysis of MEchanical Linkages, and implemented on an IBM-PC PS/2 model 80. When compared to algorithmic methods, like the Newton-Raphson, the dyad method proved to be a very efficient one and requires as little as one tenth of the time needed by the method using Newton-Raphson algorithm. Moreover, the dyad method yields the exact solution of the position analysis and no initial estimates are needed to start the analysis. This method is also insensitive to the value of the step-size crank rotation, therefore, allowing a very accurate and fast solution of the mechanism at any position of the input link.

Dynamic analysis of planar elastic mechanisms using the dyad method

2003 ◽  
Vol 217 (1) ◽  
pp. 1-14 ◽  
Author(s):  
L Romdhane ◽  
H Dhuibi ◽  
H Bel Hadj Salah
Keyword(s):  
Class Ii ◽  
Graph Representation ◽  
Elastic Mechanism ◽  
Complete Automation ◽  
Newton Raphson ◽  
Set Up ◽  
Dyad Analysis ◽  
Planar Linkages ◽  
Raphson Method ◽  
Good Agreement

Based on graph representation of planar linkages, a new algorithm has been developed to identify the different dyads of a mechanism. A dyad, or class II group, is composed of two binary links connected by either a revolute (1) or a slider (0) pair, with provision for attachment of other links by lower pair connectors located at the end of each link. There are five types of dyad: D111, D101, D011, D001 and D010. The dyad analysis of a mechanism is predicated on the ability to construct the system from one or more of the five binary structure groups or class II groups. If the mechanism is complicated and several dyads are involved, the task of identifying these dyads, by inspection, can be difficult and time consuming for the user. This algorithm allows complete automation of this task. It is based on Dijkstra's algorithm for finding the shortest path in a graph. When compared with algorithmic methods, such as the Newton-Raphson method, the dyad method proved to be a very efficient one and requires as little as one-tenth of the time needed by the method using the Newton-Raphson algorithm. The second part of this work presents an extension of the dyad method to non-rigid or elastic mechanisms. Here also, this method is predicated on the ability to subdivide the elastic mechanism into elastic dyads. The solution for each type of elastic dyad is derived and can be applied to each dyad in the mechanism. Therefore, a solution of the complete elastic mechanism is possible when the mechanism is made of dyads only. This method makes a powerful and simple tool for analysing complex elastic mechanisms. Moreover, the complexity of the model does not increase as the mechanism becomes more complex. The D111 dyad is taken as an example to demonstrate this method. A finite element (FE) analysis was made for this type of dyad, and an experimental set-up was built to validate the analysis. The dyad-FE results were in good agreement with the experimental ones.

Irrational Beliefs and Marital Conflict

1998 ◽  
Vol 82 (1) ◽  
pp. 155-160 ◽  
Author(s):  
André T. Mouller ◽  
Z. C. De Beer
Keyword(s):  
Behavior Therapy ◽  
Marital Conflict ◽  
Irrational Beliefs ◽  
Rational Emotive Behavior Therapy ◽  
Married Couples ◽  
Emotive Behavior ◽  
Thought Listing ◽  
Rational Emotive ◽  
Evaluative Beliefs ◽  
Dyad Analysis

To test the hypothesis that the major irrational evaluative beliefs postulated by Rational Emotive Behavior Therapy are related to marital conflict, 15 married couples participated in a thought-listing procedure. During this procedure, three idiosyncratic scenes portraying marital conflict and three control scenes free of conflict were identified for and presented to each member of the dyad. Analysis indicated that the conflict-portraying scenes were associated with significantly more irrational evaluative beliefs and significantly fewer rational cognitions than the control scenes.

Rivalry, Instability, and the Probability of International Conflict

2011 ◽  
Vol 28 (5) ◽  
pp. 543-565 ◽  
Author(s):  
Ursula E. Daxecker
Keyword(s):  
Civil War ◽  
Political Instability ◽  
Civil Conflict ◽  
Interstate Disputes ◽  
Time Period ◽  
Dispute Initiation ◽  
Dyad Analysis ◽  
Willingness To Use ◽  
Militarized Interstate Dispute ◽  
Militarized Interstate Disputes

This article addresses the effect of political instability and domestic conflict on the probability of militarized interstate disputes. Existing research on the subject has produced inconsistent findings. I hypothesize that the effect of political instability on international disputes is conditional on states’ involvement in civil conflict. More specifically, I argue that while political instability provides leaders with the willingness to use force, civil war creates the necessary opportunities for initiating conflict abroad. A directed-dyad analysis of international rivals for the 1816–2000 time period shows that instability coupled with civil war increases the probability of militarized interstate dispute initiation among rival states. Results are consistent for alternative indicators of political instability and civil war.

scholarly journals Dangerous dyads in the post-Soviet space: explaining Russia's military escalation decisions, 1992–2010

2021 ◽  
pp. 1-18
Author(s):  
Paolo Rosa ◽  
Adriana Cuppuleri
Keyword(s):  
Cold War ◽  
State Level ◽  
Foreign Policy Analysis ◽  
Post Cold War ◽  
Military Alliance ◽  
Soviet Space ◽  
Dyad Analysis ◽  
The Military ◽  
The Impact ◽  
Post Soviet Space

Abstract This paper analyses the military behaviour of Russia from 1992 to 2010. The method used is a combination of the dyad analysis introduced by Stuart Bremer in 1992 and the analysis of unit-level variables, which is distinctive of foreign policy analysis. We empirically test a set of hypotheses about the determinants of Russia's military behaviour in the post-Cold War period by considering the impact of changes of international variables – relative power, the presence of military alliance pacts, the territorial salience of the dispute – and state-level variables – the degree of democracy/autocracy and regime vulnerability. A bivariate and a multivariate analysis are carried out to explain the separate and joint impacts of independent variables.

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