Salih AKIN, Second Pilot at THY (graduated from DEU, Faculty of Science, Department of Mathematics)
Saadet SARICA, THY Cargo Marketing Directorate, Fare Specialist at the Fare Department (graduated from DEU, Faculty of Science, Department of Mathematics)
Date: Thursday, May 23, 2024
Time: 13:30
Location: DEÜ, Faculty of Science, B block, Prof. Dr. Ömer Köse Conference Hall
Summary: In this event, we will share my business processes and career experiences in the aviation industry.
Prof. Dr. Tatyana Khabakhpasheva, School of Mathematics, University of East Anglia, Norwich/United Kingdom
Date: May 24, 2024, Friday
Time: 14:00 am
Place: B255, Faculty of Science, Dokuz Eylül University
Abstract: Characteristics of linear hydroelastic waves propagating in an ice channel are investigated. The channel is of rectangular cross section with finite depth and of infinite extent. Liquid in the channel is inviscid and incompressible. The liquid flow caused by the ice deflection is potential. The ice is modeled by a thin elastic plate. The coupled hydroelastic problem is reduced to the problem of the wave profiles across the channel. The wave profiles are sought as series of normal dry modes of the plate, coefficients of which are to be determined. Dispersion relations of these hydroelastic waves, their critical speeds, and corresponding strain and stress distributions in the plate are determined. Several special cases in which boundary conditions, ice thickness distributions across the channel width, and ice plate compression were changed were investigated and compared with each other.
Prof. Dr. Alexander Korobkin, School of Mathematics, University of East Anglia, Norwich/United Kingdom
Date: May 24, 2024, Friday
Time: 13:00 am
Place: B255, Faculty of Science, Dokuz Eylül University
Abstract: Modelling response of an elastic floating plate to a body moving under the plate is discussed. The original problem is nonlinear and coupled with the plate deflection being dependent on the hydrodynamic pressure, which in turn depends on the plate deflection. It is shown that the problem can be treated as decoupled for some conditions of the body motion, which significantly simplifies the analysis. Within the decoupled model, the body motion and the hydrodynamic pressure along the plate/water interface are calculated without account for the plate deflection. Then this pressure is applied to the equations of the plate dynamics without account for the fluid response to the plate deflection. It is known that only rather small strains are allowed in ice plates, which limits the deflections of the ice and importance of the nonlinear effects. It is shown that nonlinear effects in problems of hydroelastic response of floating ice sheets can be approximately neglected in many practical situations.
This month’s theme of our career event organized by DEU Faculty of Science Department of Mathematics in cooperation with DEU Career Planning Center and DEU The Graduate School of Natural And Applied Sciences is “Informing Undergraduate Students about Graduate Programs”. Everyone who is interested is invited to the talk titled “Graduate Education in the Department of Mathematics at DEU” given by Asst. Prof. Dr. Celal Cem SARIOĞLU (Graduate Program Coordinator of the Mathematics Department) and by other faculty members of the Department of Mathematics under the moderation of Assoc. Prof.Dr. Aslı GÜÇLÜKAN İLHAN.
Date: Wednesday, 22.05.2024
Time: 13.00-14.00
Location: Classroom No. B255 (DEU Fac. of Sci., Dept. of Math., Block B, 2nd floor)
Speakers:
Moderator: Assoc. Prof. Dr. Aslı GÜÇLÜKAN İLHAN
This month’s theme of our career event organized by DEU Faculty of Science Department of Mathematics in cooperation with DEU Career Planning Center is “I am writing a TÜBİTAK 2209-A/B Project”. Everyone who is interested is invited to the conversation on “How to Prepare TÜBİTAK 2209 Projects?“, which we will hold with Can SELEK (Project manager) and Assoc.Prof.Dr. Aslı GÜÇLÜKAN İLHAN (Project Advisor), their 2009-A projects were supported by TUBİTAK within the scope of 2023, 2nd term applications.
Date: Tuesday, 07.05.2024
Time: 15.00-16.00
Place: Classroom No. B253 (Fac. of Sci. Dept. of Math., Block B, 2nd floor)
Speakers:
Moderator: Asst.Prof.Dr. Celal Cem SARIOĞLU
This month’s theme of our career event organized by the DEU Faculty of Science Department of Mathematics in cooperation with the DEU Career Planning Center is “Different Career Routes”. Everyone who is interested is invited to the conversation on “Air Traffic Controller”, which we will hold with “Tuğçe SERTOĞLU”, 2009 graduate of the Department of Mathematics, who works as an air traffic controller in state airports. (Participants other than Mathematics Department students are requested to contact the moderator to participate the event.)
Speaker: Tuğçe SERTOĞLU (DEU Mathematics 2009 Graduate / DHMI Air Traffic Controller)
Moderator: Asst. Prof. Dr. Celal Cem SARIOĞLU
Date and Time: 29.03.2024, 21:00
Location: online.deu.edu.tr
Channel: DEUMatematikKARİYER
Matthias Täufer, Analysis group, FernUniversität in Hagen, Germany Date: 1th March 2024, Friday Time: 13:00 Place: DEU, Faculty of Science, Department of Mathematics, Room B255
Abstract: Unique continuation is a basic property of many partial differential equations stating that solutions vanishing on subsets must be identically zero. In many cases one would like to have a quantitative version of that, meaning that one can bound the norm of solutions by their norm on subsets. In this talk, we review some history of quantitative unique continuation and present several results on quantitative unique continuation in unbounded domains. Based on joint works with Ivica Nakic (Zagreb), Martin Tautenhahn (Leipzig), Sedef Özcan (Dokuz Eylül), Paul Pfeiffer (Hagen), Albrecht Seelmann (Dortmund) and Ivan Veselic (Dortmund).
Speaker: Asst.Prof.Dr. Murat ALTUNBULAK
Moderator: Ayşenur YAZICI
Date and Time: 23.02.2023, 12:00
Location: Classroom B256 (Faculty of Science, Department of Mathematics)
Matthias Hofmann, Texas A&M University Date: 16th February 2024, Friday Time: 13:00 Place: DEU, Faculty of Science, Department of Mathematics, Room B255
Abstract: We discuss the dependence of the eigenvalues and eigenfunctions for the discrete signed p-Laplacian under perturbation by a cut parameter. In particular, we prove a formula for the derivative of the eigenvalues and show that the eigenvalues of the discrete signed p-Laplacian on the original graph can be characterized via extremal points of the perturbed system. In this context, we elaborate on how graph surgery can be used in order to compute eigenvalues of the discrete (signed) p-Laplacian by looking at some examples. The derivation formula is reminiscent of the formula for linear eigenvalue problems given by the Hellmann-Feynman theorem and our results extend previous results for the linear case p=2 attained by [Berkolaiko, Anal. PDE 6 (2013), no. 5, 12131233].