HEP计算环境模型的更新及其对IHEP计算环境发展的影响

本文从整体上讨论了进入９０年代后，国际上，高能物理（ＨｉｇｈＥｎｅｒｙＰｈｙｓｉｃｓ，ＨＥＰ）计算环境框架模型的更新。并结合国内ＨＥＰ计算环境的现状及对ＩＨＥＰ（ＩｎｓｔｉｔｕｔｅｏｆＨｉｇｈＥｎｅｒｇｙＰｈｙｓｉｃｓ）运行中的系统的实际应用分析，概要地阐述了ＩＨＥＰ中心环境将会受到的影响及可能的发展变化。

Constructions and Preliminary HV Conditioning of a Photocathode Direct-Current Electron Gun at IHEP

As one of the most important key technologies for future advanced light source based on the energy recovery linac, a photocathode dc electron gun is supported by Institute of High Energy Physics （IHEP） to address the technical challenges of producing very low ernittance beams at high average current. Construction of the dc gun is completed and a preliminary high voltage conditioning is carried out up to 440 k V. The design, construction and preliminary HV conditioning results for the dc gun are described.

NCNST, IHEP Co-establish a Lab for Nanosafety

The National Center for Nanoscience and Technology （NCNST） at CAS and the CAS Institute of High Energy Physics （IHEP） have joined hands in establishing a Laboratory for Biological Effects of Nanomaterials and Nanosafety （NCNSTIHEP） in Beijing. Its nameplate unveiling ceremony was held on June 22 on the campus of IHEE CAS Executive Vice President BAI Chunli was present at the event.

中科院高能物理所的Internet网络服务

中国科学院高能物理所(IHEP)由于和美国、日本及西欧科研合作的需要,从1987年开始国际联网的工作,于1994年5月正式进入全球最大的计算机互联网Internet。有关高能所国际联网的情况有关人士以前已有一些介绍,这里就不再多讲。这里主要介绍高能所为国内用户提供的Internet上网服务和Internet的应用。

Chinese Scientists Unveil Plans to Build Next-generation X-ray Observatory

Scientists from the Institute of Physics(IHEP),Chinese Academy of Sciences announced on March 2 that they are going to take the lead in building a next-generation X-ray observatory to explore the"extreme universe".With joint efforts from countries including Italy,Germany,France and the UK,the enhanced X-ray Timing and Polarimetry mission(e XTP),which is estimated to cost over three

CAS Physicist Wins Panofsky Prize in Experimental Particle Physics

Dr.WANG Yifang,an outstanding scientist in neutrino physics and director of the Institute of High Energy Physics(IHEP),Chinese Academy of Sciences,received the 2014 W.K.H.Panofsky Prize in Experimental Particle Physics from the American Physical Society(APS)at a special ceremony in April2014 in Savannah.Sharing the award with Kam-Biu Luk from Lawrence Berkeley National Laboratory,Dr.WANG,together with Luk,was recognized for'the leadership of the Daya Bay experiment,which produced the fi rst defi nitive measurement ofθ13 angle of the neutrino mixing matrix'.

A proposed U.S./China theoretical/experimental collaborative effort on baryon resonance extraction

In this paper we discuss the reasons for our work towards establishing a new collaboration between Jefferson Lab （JLab） and the Institute of High Energy Physics （IHEP） in Beijing. We seek to combine experimentalists and theorists into a dedicated group focused on better understanding the current and future data from JLab and from the Beijing Electron Positron Collider （BEPC）. Recent JLab results on the extraction of single- and double-polarization observables in both the lπ- and 2π-channel show their high sensitivity to small production amplitudes and therefore their importance for the extraction of resonance parameters. The Beijing Electron Spectrometer （BES） at the BEPC has collected high statistics data on J/ψ production. Its decay into baryon-antibaryon channels offers a unique and complementary way of probing nucleon resonances. The CEBAF Large Acceptance Spectrometer, CLAS, has access to N＊ form factors at high Q2 which is advantageous for the study of dynamical properties of nucleon resonances, while the low-background BES results will be able to provide guidance for the search for less-dominant excited states at JLab. Moreover, with the recently approved experimental proposal Nucleon Resonance Studies with CLAS12 and the high-quality data streaming from BES-Ⅲand CLAS, the time has come for forging a new Trans-Pacific collaboration of theorists and experimentalists on NSTAR physics.

如何通过谱系重编程获得肝细胞

随着再生医学的快速发展,如何获得安全有效的肝细胞成为目前肝脏疾病治疗的研究重点。目前,肝细胞来源于原代分离、i PSC/ESC分化和谱系重编程等方法。近年来,肝细胞谱系重编程发展迅速,且表现出光明的应用前景。本文就肝细胞谱系重编程、相关的重要转录因子以及诱导性肝细胞的鉴定等内容做一综述,为诱导性肝细胞走向肝脏细胞治疗过程中面临的问题提出拟解决方案。