School of Physics: HEPCo Weekly Seminar Series

Speaker

Haidar Sheikhahmadi

Affiliation

School Of Astronomy, IPM

Title of talk

Looping story in early universe cosmology

داستان حلقه‌های کوانتومی در کیهان اولیه
Date and time

Tuesday, December 31st, 2024 (Dey 11th, 1403), 2:00 pm (Tehran zone)

Link

https://www.skyroom.online/ch/schoolofphysics/highenergyseminar

Abstract

We will review the ongoing debates on loop corrections in the multi-phase inflationary universe and their controversial results. Then, we will show that quantum effects can dramatically affect the long CMB-scale modes after regularizing and renormalizing divergences in different stages of inflationary evolution.

🔷 چهار درس طلایی

استیون واینبرگ فیزیک‌پیشهٔ برجستهٔ قرن بیستم سه سال پیش در یکی از همین روزهای گرم تابستان درگذشت و میراث بزرگی از آموزش، پژوهش، فرهنگ و عمومی‌سازی علم بر جای گذاشت. متن پیوست ترجمهٔ جستاری است که بر اساس سخنرانی واینبرگ در مراسم دانش‌آموختگی دانشگاه مک‌گیل در سال ۲۰۰۳ تهیه شده است و شامل چهار توصیه به دانشجویانی است که می‌خواهند به کارهای پژوهشی بپردازند.

خلاصهٔ یک‌خطی توصیه‌ها:

1. هیچ‌کس همه‌ چیز را نمی‌داند، شما هم قرار نیست بدانید.
2. اگر آن‌قدر شنا بلدید که غرق نشوید به استقبال آب‌های خروشان بروید. از تلاطم نترسید. چیزهای هیجان‌انگیز در همین‌‌جورجاها پیدا می‌شوند.
3. خودتان را به‌خاطر اتلاف وقت سرزنش نکنید. هیچ‌کس همیشه خلاق نیست. تولد ایده‌های خلاقانه نیاز به زمان دارد.
4. از یادگیری تاریخ علم غافل نشوید.

فایل پی‌دی‌اف مقاله‌ٔ اصلی را هم می‌توانید از این‌جا بردارید:
https://t.me/DeranXiv/35

@k1samani_channel

10th ( Proceedings by Springer ) ICICT 2025 | 18 - 21 February 2025 | London, United Kingdom.

Tenth International Congress on Information and Communication Technology : https://icict.co.uk/

ICICT 2025 will be organised in Hybrid Mode [ 18 February 2025 - Physical Mode || 19-21 February 2025 - Digital Mode ]

==========================================================

Manuscript Submission Important Dates :

- 10th January 2025 : Last Chance for Paper Submission

Publication : All ICICT 2025 presented papers will be published in conference proceedings by Springer LNNS. ISSN: 2367-3370, Series : https://www.springer.com/series/15179

Indexing : Indexed by SCOPUS, INSPEC, WTI Frankfurt eG, zbMATH, SCImago. All books published in the series are submitted for consideration in the Web of Science.

PAPERS SUBMISSION : Submissions of high quality papers in all areas of ICT and its applications.The submissions are handled only through the Easychair website at: https://icict.co.uk/call-for-papers.php#section02

Organise & Managed by : Global Knowledge Research Foundation & G R Scholastic LLP

Venue :

Physical : America Square Conference Centre, London, United Kingdom.

Digital Platform : Zoom

Dear Friends and Colleagues,

ICICT 2025 invites various research associates to discuss the current status, technical challenges, of the future services and applications, as part of a rich conference program including Keynote talks, Paper Presentation as well as Regular and Special Sessions.

The Tenth edition of ICT conference will target state-of-the-art as well as emerging topics pertaining to ICT and its Supported e-Agriculture and Rural Development Technologies, e-Education and Computing Technologies, e-Mining and Inclusive Technologies for implementation for Engineering and Managerial Applications through ICT.

The topics of interest include but are not limited to the following :

Track 1: COMMUNICATIONS
Track 2: INFRASTRUCTURE AND COMPUTATION
Track 3: ENGINEERING APPLICATIONS
Track 4: E-GOVERNANCE AND GOVERNMENT
Track 5: TECHNOLOGY COMPUTATION
Track 6: INTELLIGENT SYSTEMS
Track 7: ELECTRONIC SYSTEMS & CIRCUITS
Track 8: SIGNAL AND IMAGE PROCESSING
Track 9: HEALTH INFORMATICS
Authors are kindly invited to submit their formatted full papers including results, tables, figures and references. All submissions are handled through the Easy Chair at https://icict.co.uk/call-for-papers.php#section02

For any query, Please write mail on [email protected] or a drop message on https://icict.co.uk/contact. php

Sincerely Yours - Convener ICICT 2025

Imprint of Massive Neutrinos on Persistent Homology (Morphology) of Large-Scale Structure

Mohammad Hossein Jalali Kanafi

Department of Physics, Shahid Beheshti University

Abstract:

The morphology of the cosmos provides valuable information about the structure of the cosmic web, which can be used for cosmological inferences. In this talk, I will discuss the capability of Persistent Homology (PH) as a morphological tool to investigate the impact of massive neutrinos on the Large-Scale Structure (LSS). PH naturally addresses the multi-scale topological characteristics of the LSS as a distribution of clusters, loops, and voids. Utilizing the Fisher forecast formalism, I will provide a quantitative assessment about the constraining power of some PH vectorizations to estimate the parameters of the $\nu \Lambda CDM$ model.

یکشنبه 15 مهر 1403، ساعت 17:00

Sunday 6 October 2024 – 17:00 Tehran Time

Hybrid Seminar

دانشکده فیزیک – طبقه اول – کلاس فیزیک 3 Physics Department – first floor – Room Physics 3 /

https://vc.sharif.edu/ch/cosmology

🇪🇸 Postdoctoral position in extragalactic radio astronomy 🇪🇸

We invite applications for a postdoctoral position of two years duration at Universidad Complutense de Madrid (Spain) to work with Dr. Shane P. O'Sullivan on extragalactic radio surveys related to cosmic magnetism science.

The postdoctoral researcher will work with data from ongoing radio polarization surveys, such as the LOFAR Two-Metre Sky Survey and the ASKAP-POSSUM survey, to constrain the properties of cosmic magnetic fields across a wide range of physical scales and use the results to test models for their origin. They will also be involved in the preparation for future projects with the Square Kilometre Array (SKA) telescope, which Spain is a full member of.

The successful candidate will become part of the Extragalactic Astrophysics and Astronomical Instrumentation group of UCM (GUAIX), as well as the Institute of Particle Physics and the Cosmos (IPARCOS). See https://guaix.ucm.es/home/science/cosmic-magnetic-fields for more details.

Applicants should have a PhD in Astrophysics and experience in radio astronomy.

Applications are especially encouraged from people from underrepresented groups.

Interested candidates should email their CV (including the names of two referees), a motivation letter (max. 1 page) and a summary of research accomplishments to date (max. 1 page) to [email protected] by 25 November 2024. The earliest start date will be mid-Feb 2025.
Publication Start Date
2024 Oct 02
Application Deadline
2024 Nov 25

🇳🇱 PhD positions at the University of Amsterdam 🇳🇱

The Anton Pannekoek Institute for Astronomy (API) at the University of Amsterdam invites applicants for PhD positions in astronomy and astrophysics. The positions are open to candidates from any country. The institute provides a stimulating, international environment in a city where English is a common language. Of our current PhD candidates, over 70% are foreign and over 40% are female. You execute a vigorous research program, under the supervision of one or more faculty members. Positions will be available in fields of research where the institute is active, including planet formation and exoplanets, stellar astrophysics, astrophysics of neutron stars and black holes, and the detection and characterization of radio counterparts of gravitational wave sources.

Link to Online Application
https://vacatures.uva.nl/UvA/job/PhD-Positions-in-Astronomy-and-Astrophysics/804105602/
Publication Start Date
2024 Oct 01
Application Deadline
2024 Nov 04

Journal Club: Experiments & Phenomenology / Hybrid format

Date:

Monday, Jul 1, 2024 / دوشنبه، 11 تیر 1403

Time:

11:00 AM - 12:00 PM (Tehran time)

Speaker:

Dr. Saeedeh Afhami

Affiliation:

Iranian Light Source Facility & School of Particles and Accelerators, IPM

Title:

Non-Evapourable Getters Coating, a novel route to achieve ultra high vacuum

Title in Persian:

لایه نشانی جاذب های غیر تبخیری، مسیری جدید برای دستیابی به خلاء بسیار بالا

Abstract:

The search for an effective solution to the problem of pumping conductance-limited vacuum systems, as those for particle accelerators, lead, at the end of 1995, to the start of the development of Non-Evaporable Getters (NEG) thin film coatings at CERN. Coating the whole inner surface of a vacuum chamber, after dissolving the NEG oxide layer by heating (activation), transforms it from a source of
gas into a pump providing very high pumping speed per unit length. In this talk, we will present the NEG physics and also describe how discharge voltage, magnetic field strength, and pressure effect on the deposition rate.

Based on: https://arxiv.org/pdf/2006.01537

Meeting Place: Seminar Room, School of Particles and Accelerators, IPM

Link to Join Virtually: https://meet.google.com/bda-vsem-tuv

?? PhD and Postdoc Positions in Lorentzian Geometry/General Relativity/Metric Geometry, Vienna, Austria ??

Contact:  ef-applications.mathematics[AT]univie.ac.at
Location:  Vienna, Austria

We are seeking to fill up to five PhD and four Postdoc positions within the research project

A new Geometry for Einstein’s Theory of Relativity and beyond

The project is situated at the intersection of Lorentzian Geometry, General Relativity, Metric Geometry and Optimal Transport, and has received major funding by the Austrian Science Fund (FWF) in the framework of its “Emerging Fields” program.

We are looking for exceptional candidates with a strong background in at least one, preferably several, of the following fields: Riemannian/Lorentzian geometry, functional analysis and measure theory, optimal transport, metric geometry, calculus of variations, geometric analysis, mathematical General Relativity.

https://ef-geometry.univie.ac.at/call-for-praedoc-and-postdoc-positions/

ef-geometry.univie.ac.at

Call for praedoc (PhD students) and postdoc positions – A new Geometry for Einstein’s Theory of Relativity & Beyond

Emerging Fields project - A new Geometry for Einstein’s Theory of Relativity & Beyond. This project is funded by the FWF and based at the Faculty of Mathematics of the University of Vienna