scholarly journals Quasi-powerful 𝑝-groups

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
James Williams
Keyword(s):  
Large Family ◽  
Power Structure ◽  
Number Of Generators

Abstract In this paper, we introduce the notion of a quasi-powerful 𝑝-group for odd primes 𝑝. These are the finite 𝑝-groups 𝐺 such that G / Z ⁢ ( G ) G/Z(G) is powerful in the sense of Lubotzky and Mann. We show that this large family of groups shares many of the same properties as powerful 𝑝-groups. For example, we show that they have a regular power structure, and we generalise a result of Fernández-Alcober on the order of commutators in powerful 𝑝-groups to this larger family of groups. We also obtain a bound on the number of generators of a subgroup of a quasi-powerful 𝑝-group, expressed in terms of the number of generators of the group, and we give an example which demonstrates this bound is close to best possible.

Crystal chemistry of high-Tc superconductors

1990 ◽  
Vol 48 (4) ◽  
pp. 1118-1119
Author(s):  
Maryvonne Hervieu
Keyword(s):  
Oxygen Deficiency ◽  
Large Family ◽  
Copper Oxides ◽  
High Tc Superconductors ◽  
High Tc ◽  
Single Mechanism ◽  
Square Planar ◽  
History Of ◽  
Bismuth Cuprates ◽  
New Compounds

Four years after the discovery of superconductivity at high temperature in the Ba-La-Cu-O system, more than thirty new compounds have been synthesized, which can be classified in six series of copper oxides: La2CuO4 - type oxides, bismuth cuprates, YBa2Cu3O7 family, thallium cuprates, lead cuprates and Nd2CuO4 - type oxides. Despite their quite different specific natures, close relationships allow their structures to be simply described through a single mechanism. The fifth first families can indeed be described as intergrowths of multiple oxygen deficient perovskite slabs with multiple rock salt-type slabs, according to the representation [ACuO3-x]m [AO]n.The n and m values are integer in the parent structures, n varying from 0 to 3 and m from 1 to 4; every member of this large family can thus be symbolized by [m,n]. The oxygen deficient character of the perovskite slabs involves the existence or the co-existence of several types of copper environment: octahedral, pyramidal and square planar.Both mechanisms, oxygen deficiency and intergrowth, are well known to give rise easily to nonstoichiometry phenomena. Numerous and various phenomena have actually been characterized in these cuprates, strongly depending on the thermal history of the samples.

WACANA, KUASA DAN AGAMA DALAM KONTESTASI PILGUB JAKARTA

ALQALAM ◽  
2017 ◽  
Vol 34 (2) ◽  
pp. 47
Author(s):  
Joko Priyanto
Keyword(s):  
Civil Society ◽  
Power Relations ◽  
Mass Movement ◽  
Power Structure ◽  
Hegemonic Discourse ◽  
Islamic Society

Religion Blasphemy addressed to Jakarta Governor who is also a candidate for Jakarta Governor Election 2017 is the beginning of a series of polemic along process of Jakarta Governor Election 2017. This case triggers friction between Islamic society as a civil society and government as authority. This research explored this case by using theory of power relations Foucault. The result shows that the mass movement of Islamic society is power from Islamic society knowledge. Power structure tries to discipline this movement by hegemony in form of discourse. However, hegemonic discourse from civil society (Islamic society) also tries to challenge. The fight of hegemonic in form of discourse becomes so viral in all media, element and institution. This research shows that the discourse of Leader and Diversity is a signifier empty which be contestation of giving meaning.   Keywords: knowledge, power, Foucoult, religion.

Unreconciled Strivings of ‘Exilic Consciousness’: Critical Praxis of Resistance in Susan Abulhawa's Mornings in Jenin

2019 ◽  
Vol 18 (1) ◽  
pp. 101-120
Author(s):  
Ayman Abu-Shomar
Keyword(s):  
Identity Construction ◽  
Power Structure ◽  
Resistance Literature ◽  
Political Narratives ◽  
Arab Israeli Conflict

This article discusses how Susan Abulhawa's Mornings in Jenin, its thematic concerns and aesthetics, are developed in tandem with the discourse of diaspora and exilic consciousness leading to critical praxis. It traces the interactions between exilic consciousness and identity construction in the context of resistance literature. These interactions exhibit the author's ability to be inside and outside discourses of struggle producing a model in which exile challenges bigoted struggles, hence the evolution of critical praxis. In the context of the Arab-Israeli conflict, Abulhawa represents another humanistic voice that resists dominant political narratives by dismantling their hegemonic power structure.

Case Report of a large family with hyperparathyroidism- jaw tumor syndrome (HPT-JT) and a deletion of the third exon of CDC73

2019 ◽  
Author(s):  
Collen Lauriane Le ◽  
Sara Barraud ◽  
Odou Marie Francoise ◽  
Marta Spodenkiewicz ◽  
Antoine Braconnier ◽  
...  
Keyword(s):  
Case Report ◽  
Large Family ◽  
The Third

Study on the Modes of Operation of a Multi-Machine Installations with Mechanical Reduction

2019 ◽  
pp. 12-22
Author(s):  
A. M. Oleynikov ◽  
L. N. Kanov
Keyword(s):  
Mathematical Description ◽  
Reactive Power ◽  
Maximum Efficiency ◽  
Wind Flow ◽  
System Of Equations ◽  
Mechanical Equilibrium ◽  
Synchronous Generators ◽  
Electromagnetic Excitation ◽  
Number Of Generators ◽  
Wide Range

The paper gives the description of the original wind electrical installation with mechanical reduction in which the output of vertical axis wind turbine with rather low rotation speed over multiplicator is distributed to a certain number of generators. The number of acting generators is determined by the output of actual operating wind stream at each moment. According to this constructive scheme, it is possible to provide effective and with maximum efficiency installation work in a wide range of wind speeds and under any schedule issued to the consumer of electricity. As there are no any experience in using such complexes, mathematical description of its main elements is given, namely windwheels, generators with electromagnetic excitation of magnetic electrical type, then their interaction with windwheel, and also the results of mathematical modeling of work system regimes under using the offered system of equations. The basis for the mathematical description of the main elements of the installation – synchronous generators – are the system of equations of electrical and mechanical equilibrium in relative units in rotating coordinates without considering saturation of the magnetic circuit. The equation of mechanical equilibrium systems includes torque and brake windwheel electromagnetic moments of generators with taking into account the reduction coefficients and friction. In addition, we specify the alternator rotor dynamics resulting from continuous torque of windwheel fluctuations under the influence of unsteady wind flow and wind speed serving as the original variable is modeled by a set of sinusoids. Model simplification is achieved by equivalization of similar generators and by disregarding these transitions with a small time constant. Calculation the installation with synchronous generators of two types of small and medium capacity taking into account the operational factors allowed us to demonstrate the logic of interactions in the main elements of the reported complex in the process of converting wind flow into the generated active and reactive power. We have shown the possibility of stable system work under changeable wind stream condition by regulating of the plant blade angle and with simultaneous varying of generator number of different types. All these are in great interest for project organizations and power producers.

Reformasi Pendidikan sebagai Tuntutan Sejarah

1970 ◽  
Vol 11 (2) ◽  
pp. 187-200
Author(s):  
Nawawi Nawawi
Keyword(s):  
Creative Thinking ◽  
Power Structure ◽  
Democratic Society ◽  
Human Being ◽  
Human Right ◽  
National Education ◽  
Form Of Government ◽  
New Vision

The system of national education considered necessary a reform. During the time national education only yielding depressed human being, is not critical and is not creative, thinking and acting only according to power structure. National education have to be returned to powered of society and to realize the new vision of society Indonesia which Madani. National education represent the demand foundament commended by constitution 1945. Therefore national education have to as according to constitution, realizing democratic society, esteem the human right and form of government smart Indonesian nation.

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