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Öğe Cat1-polygroups and pullback cat1-polygroups(Iranian Mathematical Society, 2014) Davvaz, Bijan; Alp, MuratIn this paper, we give the notions of crossed polymodule and cat1-polygroup as a generalization of Loday's definition. Then, we define the pullback cat1-polygroup and we obtain some results in this respect. Specially, we prove that by a pullback cat1- polygroup we can obtain a cat1-group. © 2014 Iranian Mathematical Society.Öğe The status of Turkish synchrotron radiation source machine design(Joint Accelerator Conferences Website (JACoW), 2014) Nergiz, Zafer; Aksakal, Hüsnü; Aksoy, Avni; Kaya, Cengiz; Kurtuluş Öztürk, Ö.Turkish synchrotron radiation source named TURKAY, is a part of the TAC (Turkish Accelerator Center) Project, is at conceptual design process. The radiation properties of a SR sources are strongly depends on the magnetic lattice of the storage ring. The storage ring is designed to obtain low emittance electron beam at 3 GeV energy. Optimization of the lattice properties, including the nonlinear dynamics, is described in detail. Radiation properties are calculated by the example of some existing undulators from the other SR facilities. Copyright © 2014 CC-BY-3.0 and by the respective authors.