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Yayın A social democratic party in Istanbul during the post-armistice years(Suna ve İnan Kıraç Vakfı Kültür ve Sanat İşletmesi, 2022-12-31) Ülker, ErolThe future founder of the Social Democratic Party (Sosyal Demokrat Fırkası, SDF), Doctor Hasan Rıza’s (bin Esat) relationship with the socialist movement began during the Second Constitutional Period.1 A permanent member of the Medical Society, Dr. Hasan Rıza resigned from the Committee of Union and Progress (CUP) with a letter he wrote in January 1911.2 He subsequently adopted socialism, and in 1913–1914 contacted the Socialist International to inquire how to become a member of the organization.3 The SDF, however, was not established during this period, but following World War I, which ended in defeat for the Ottoman Empire. The socialist parties and groups founded at the beginning of the Second Constitutional Period could not survive in the authoritarian political atmosphere that emerged after the assassination of Mahmut Şevket Pasha in July 1913 and could only begin a reorganization process once the CUP government, which had been ruling unilaterally since January 1913, fell from power. At the end of 1918, the SDF was among the first leftist parties to emerge during this period.4 In addition to Dr. Hasan Rıza, who was listed as the leader of the party in its founding application, twelve other people are mentioned (fig. 1).Yayın Surfaces with constant Gaussian and mean curvatures N the anti-de Sitter space H31(Honam Mathematical Soc, 2024-06) Dursun, UğurIn this work, we study time-like and space-like surfaces invariant by a group of translation isometries of the half-space model H31 of the anti-de Sitter space H31. We determine all such surfaces with constant mean curvature and constant Gaussian curvature. We also obtain umbilical surfaces of H31.Yayın Effect of modulated anodal stimulation over the dorsolateral prefrontal cortex on working memory: a preliminary study(Istanbul University, 2025-12-31) Küçük, Zeynep; Erdoğan, Ezgi Tuna; Kurt, Adnan; Karamürsel, SacitObjectives: Working memory has two components: temporary storage and manipulation of the information necessary for cognitive behavior through the central executive system. This study aimed to investigate the effects of modulated anodal transcranial direct current stimulation (mtDCS) of the dorsolateral prefrontal cortex on working memory. Materials and Methods: Twelve volunteers without neurological or psychiatric disorders and without drug use participated. Working memory performance was assessed with a visual 3-back task using consonant letters during stimulation. A 20/minute training session was conducted to facilitate learning, and participants who achieved an accuracy rate of 50% or higher proceeded to the main experiment. Four stimulation conditions were applied, each lasting 10 minutes: mtDCS-11 Hz and mtDCS-22 Hz (1.70 mA offset, 0.35 mA peak/to/peak), direct current (DC) (2 mA), and sham. Reaction times and total correct responses were recorded. Results: Statistical analysis of the left dorsolateral prefrontal cortex (DLPFC) stimulation revealed a significant difference in the mean numbers of correct responses among the mtDCS and transcranial direct current stimulation (tDCS) conditions, but not compared with sham. The mean number of correct responses under mtDCS-11Hz and mtDCS-22Hz was significantly lower than under DC stimulation; however the performance decrement under 11 Hz mtDCS was the most pronounced among the active conditions. Conclusion: mtDCS-11Hz and mtDCS-22Hz negated the subtle facilitation of tDCS might have provided.
