A Note on the Dispersion-Theoretic Approach to the One Additional Pion Production by Pion-Nucleon Collision

1959 ◽  
Vol 22 (4) ◽  
pp. 499-512 ◽  
Author(s):  
Kin-ichi Ishida
Keyword(s):  
Pion Production ◽  
Theoretic Approach ◽  
Nucleon Collision ◽  
Pion Nucleon ◽  
The One

scholarly journals Pion Production in Pion-Nucleon Collision with Assumption of Strong Pion-Pion Interaction

1959 ◽  
Vol 22 (3) ◽  
pp. 448-451 ◽  
Author(s):  
D. Ito ◽  
M. Yamazaki ◽  
T. Kobayashi ◽  
K. Mori
Keyword(s):  
Pion Production ◽  
Pion Interaction ◽  
Nucleon Collision ◽  
Pion Nucleon

Pion-nucleon collision and single-pion production - II 02

1967 ◽  
Vol 51 (1) ◽  
pp. 40-73 ◽  
Author(s):  
A. M. Gleeson ◽  
K. T. Mahanthappa
Keyword(s):  
Pion Production ◽  
Nucleon Collision ◽  
Pion Nucleon

scholarly journals Pathways from marine protected area design and management to ecological success

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e1424 ◽  
Author(s):  
Murray A. Rudd
Keyword(s):  
Marine Protected Area ◽  
Theoretic Approach ◽  
Negative Results ◽  
Complex Interactions ◽  
General Terms ◽  
Ecological Performance ◽  
Ecological Isolation ◽  
Ecological Success ◽  
The One

Using an international dataset compiled from 121 sites in 87 marine protected areas (MPAs) globally (Edgar et al., 2014), I assessed how various configurations of design and management conditions affected MPA ecological performance, measured in terms of fish species richness and biomass. The set-theoretic approach used Boolean algebra to identify pathways that combined up to five ‘NEOLI’ (No-take,Enforced,Old,Large,Isolated) conditions and that were sufficient for achieving positive, and negative, ecological outcomes. Ecological isolation was overwhelming the most important condition affecting ecological outcomes butOldandLargewere also conditions important for achieving high levels of biomass among large fishes (jacks, groupers, sharks). Solution coverage was uniformly low (<0.35) for all models of positive ecological performance suggesting the presence of numerous other conditions and pathways to ecological success that did not involve the NEOLI conditions. Solution coverage was higher (>0.50) for negative results (i.e., the absence of high biomass) among the large commercially-exploited fishes, implying asymmetries in how MPAs may rebuild populations on the one hand and, on the other, protect against further decline. The results revealed complex interactions involving MPA design, implementation, and management conditions that affect MPA ecological performance. In general terms, the presence of no-take regulations and effective enforcement were insufficient to ensure MPA effectiveness on their own. Given the central role of ecological isolation in securing ecological benefits from MPAs, site selection in the design phase appears critical for success.

scholarly journals Partial wave analysis of HADES data for two-pion production in pion-nucleon reactions

2019 ◽  
Vol 199 ◽  
pp. 02001
Author(s):  
I. Ciepał ◽  
W. Przygoda ◽  
A. V. Sarantsev
Keyword(s):  
Partial Wave ◽  
Pion Production ◽  
Meson Production ◽  
Resonance Region ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Final State ◽  
Hades Collaboration ◽  
Pion Nucleon

Pion beams are perfect tools to probe resonance excitations at a fixed energy, thus properties of baryonic resonances and their coupling channels can be studied. The HADES Collaboration performed a systematic scan around the second resonance region at four different pion beam momenta 0.656, 0.69, 0.748 and 0.8 GeV/c in π− p reaction. The role of the N(1520) resonance in conjunction with the intermediate ρ-meson production has been studied in the framework of a partial wave analysis. Preliminary results on exclusive channels with one pion (π− p) and two pions (nπ+π− and pπ−π0) in the final state are presented.

Communities of practice, impression management, and great power status: Military observers in the Russo-Japanese War

2020 ◽  
Vol 5 (3) ◽  
pp. 274-293
Author(s):  
Kiran Banerjee ◽  
Joseph MacKay
Keyword(s):  
Communities Of Practice ◽  
Impression Management ◽  
Great Power ◽  
Theoretic Approach ◽  
Dual Effect ◽  
Historical Case ◽  
Institutional Legitimacy ◽  
The One ◽  
The Military ◽  
Modern War

AbstractMilitary attachés and wartime observers have received surprisingly little attention in international relations. Why do states exchange attachés, permitting uniformed foreigners to gather intelligence on their territory and during their wars? To explain, we adopt a broadly practice-theoretic approach, focusing on the individuals who developed the role by living it, showing how they both innovated a distinct military practice and established institutional legitimacy for attachés. We address an early historical case in which the practice proliferated: the Russo-Japanese War, throughout which observers represented multiple European states, on both sides of the conflict. Sometimes termed the first modern war, the conflict saw Japan's entry into the Eurocentric great power system. In this context, embedded attachés had a dual effect. On the one hand, a professional attaché community established itself: we show how local innovation by embedded officers, in the context of this structurally destabilising event, permitted the creation of a new institutional role that might otherwise have been impossible. On the other, the Japanese made use of the attachés as witnesses for Western governments, observing their performance of great power-hood, as they defeated Russia. The argument has implications for understanding both the military attaché system and communities of practice as such.

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