Results 291 to 300 of about 10,994,822 (334)

Permanent Friends? Dynamic Difference and the Democratic Peace

International Studies Quarterly, 2013
Perhaps the simplest explanation for where fault lines lie in a political process involves the presence of an "other." Difference divides and similarity unites. These similarities and differences can in turn orient and propagate conflict. Yet, similarity and difference are also dynamic, evolving in response to changing population characteristics or a ...
Gartzke, Erik, Weisiger, Alex
openaire   +2 more sources

Permanent Magnet losses Comparisons of Permanent Magnet Vernier Motors With Different Stator Topologies

2020 International Conference on Electrical Machines (ICEM), 2020
In this paper, the permanent magnet (PM) losses in the permanent magnet vernier motors (PMVM) with different stator topologies are investigated. Firstly, the compared motor models are proposed and analyzed. Then, the mechanism and calculation model of magnet losses are investigated, and the slot harmonics highlight.
Yanlei Yu, Feng Chai, Yulong Pei
openaire   +1 more source

Design and Analysis of Different Structures of Permanent Magnet for Permanent Magnet Linear Synchronous Motors

2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD), 2020
Permanent magnet linear synchronous motor (PMLSM) has a good application prospect in the fields of electromagnetic emission. The finite element method is applied to analyze the magnetic field of PMLSM with different permanent magnet (PM) structures. Then, the thrust characteristic of the PMLSM is optimized by PM cutting and Halbach PM, which promotes ...
Fengrui Cui, Zhaolong Sun, Hanning Qian, Wei Xu   +3 more
openaire   +1 more source

Performance analysis of different rotor topologies in permanent magnet motor

IEEE EUROCON 2017 -17th International Conference on Smart Technologies, 2017
In this paper a novel methodology for analysis of electrical machines using finite element method is presented. At the beginning a short presentation of the investigated motor as well as the basic topologies, performance properties and characteristics is presented.
Dimitar Trajkovski, Goga Cvetkovski
openaire   +1 more source

Hysteresis Losses in Different Types of Permanent Magnets Used in PMSMs

IEEE Transactions on Industrial Electronics, 2017
In permanent magnet synchronous machines (PMSM), depending on the machine application, different types of permanent magnets (PM) can be used. The most common PMs are ferrite magnets, neodymium iron boron magnets (NdFeB), and samarium cobalt magnets (SmCo).
Ilya Petrov, Dmitry Egorov, Joosep Link, Raivo Stern, Sami Ruoho, Juha J. Pyrhönen   +5 more
openaire   +1 more source

Root canal morphology of mandibular permanent molars at different ages

International Endodontic Journal, 2008
AbstractAim  To investigate differences in the root canal morphology of permanent mandibular molar teeth at various ages.Methodology  Four hundred and eighty permanent mandibular first and second molars were examined. First and second molars were divided into six and five groups, respectively, according to the age of the patient at the time of ...
H R D, Peiris, T N, Pitakotuwage, M, Takahashi, K, Sasaki, E, Kanazawa   +4 more
openaire   +2 more sources

Are Differences in Firm Size Transitory or Permanent?

1997
Cross-section or short-panel econometric techniques typically used to examine Gibrat’s Law of Proportionate Effect suggest that some degree of mean reversion exists, but may exaggerate the apparent randomness of corporate growth. We argue that a more natural way to explore the long-run distribution of firm sizes is to examine data on the growth of ...
Geroski, Paul A, Samiei, Hossein, Urga, Giovanni   +2 more
openaire   +1 more source

The Meaning of Object Permanence at Different Zoological Levels

Human Development, 2009
The nature of the object concept is reviewed at various zoological levels, and special importance is given to the notion of its continued existence. Three fundamentally different types of response to the disappearance of an object are described: (1) on the invertebrate level, stereotyped forms of behavior can either increase or decrease the probability
openaire   +2 more sources

Congenital permanent diabetes: a different type of diabetes?

Acta paediatrica (Oslo, Norway : 1992), 1997
To investigate two related children with congenital permanent diabetes.Two related male patients of Arab origin with congenital permanent diabetes were studied for immunological and genetic markers, insulin and glucagon secretion, thiamine levels, pancreatic ultrasounds studies and developmental characteristics.Both patients developed normally.
N, Shehadeh, R, Gershoni-Baruch, H, Mandel, I, Nutenko, A, Etzioni   +4 more
openaire   +1 more source

[Permanence of Chlamydia of different serotypes in tissues (methodology)].

Revue internationale du trachome et de pathologie oculaire tropicale et subtropicale et de sante publique : organe de la Ligue contre le trachome avec la collaboration de l'International Organization against Trachoma et des organisation..., 1994
Immunofluorescence detection of C. trachomatis requires trained personnel because the threshold between positive and negative reaction is not obvious. Patients antibodies must cover EB and thus prevent binding with Mab. This problems have stimulated research on Chlamydiae probes DNA hybridization technology was applied and the specificity of the ...
P, Vérin, B, Mortemousque, P, Coulon, W, Williamson, P, Gendre   +4 more
openaire   +1 more source