Sunday, March 24, 2019

190330 Steady-State Ultracold Sr Near Quantum Degeneracy - Applications in CW Atom Laser and Clocks

Title:
Steady-State Ultracold Sr Near Quantum Degeneracy - Applications in CW Atom Laser and Clocks

Speaker:
陳俊嘉 (Chun-Chia Chen), PhD student, University of Amsterdam

Time:
03/30 (Sat.) 5 pm PDT, 6 pm MDT, 7 pm CDT, 8 pm EDT
03/31 (Sun.) 8 am Taiwan

Keywords:
Physics, Cold atom, Quantum gas, Precision measurement, Atomic clock


Abstract:
So far, BECs and atom lasers have only been demonstrated as the product of a time sequential, pulsed cooling sequence. For applications such as next generation atomic clocks, superradiant lasers or atom interferometers for gravitational wave detection, a steady-state source of degenerate atoms offers great advantages. We present an apparatus that produces a steady-state strontium sample with a phase-space density approaching degeneracy, thus taking a critical step towards demonstrating steady-state atom lasers. Our machine achieves this by simultaneously cooling atoms in spatially separated regions on both the 30-MHz and 7.4-kHz linewidth Sr transitions. We then continuously load a dipole trap where a Stark shift protected dimple collects the coldest atoms. Finally, we demonstrate a new deceleration method that might bridge the gap between the unity phase-space density now demonstrated and an eventual steady-state BEC.

Saturday, March 9, 2019

190316 台灣的國際法地位:過去、現在,與未來

Title:
台灣的國際法地位:過去、現在,與未來

Speaker:
黃聖峰 (Shin-Hong Ng (Sheng-Feng Huang)), PhD student, The University of Edinburgh

Time:
注意:本週美國開始日光節約時間,時間調快一小時
03/16 (Sat.) 5 pm PDT, 6 pm MDT, 7 pm CDT, 8 pm EDT
03/17 (Sun.) 8 am Taiwan

Keywords:
Public International Law, Decolonization & Self-Determination, Sovereignty, Decolonization, Independence


Abstract:
Taiwan, as the homeland of more than 23 millions of people, is one of the active participants of international affairs. However, under the pressure imposed by the PRC, Taiwan's road to the world is narrowed and the situation is getting worse. How come the international community would ever allow this to happen? Or, besides the PRC's aggressive territorial claim, there is something behind the disadvantageous situation faced by Taiwan? My research studies the issue of Taiwan's international legal status from the historical aspect and international law. By objectively examine and evaluation the actual legal status of Taiwan, the path for Taiwan to acquire an internationally recognizable legal status as an independent sovereign state is clear, and the answer lies in the right to external self-determination under the decolonization context.

Sunday, March 3, 2019

190309 自閉症核心症狀的性別差異 + School Psychologist 簡介

Title:
自閉症核心症狀的性別差異 + School Psychologist 簡介

Speaker:
陳孟筳 (Meng-Ting Chen), PhD candidate, UNC Chapel Hill

Time:
03/09 (Sat.) 5 pm PST, 6 pm MST, 7 pm CST, 8 pm EST
03/10 (Sun.) 9 am Taiwan

Keywords:
Psychology, Child development, School psychology, Meta-analysis, Sex difference, Assessment tools

  為配合本研究發表時程,本次錄影將延遲上傳

Abstract:
探討不同性別的自閉症個案核心症狀嚴重程度不同的可能因子。並簡介學校心理師在學校中的角色,以北卡為例介紹孩子接受特教服務的流程。