Theoretical models and neural mechanisms of prosocial risky behavior

亲社会风险行为(prosocial risky behavior)是指为了他人利益或社会福利做出的冒险行为. 因兼具亲社会性和风险性, 且经常与消极的风险行为交替发生, 亲社会风险行为在日常生活中难以被识别, 但在一定程度上表现出了人类积极健康发展的特点. 在明确亲社会风险行为概念的来源、界定及其测量方法的基础上, 本文借鉴了亲社会行为和风险行为的解释路径, 从风险偏好和社会偏好整合加工的视角对人类亲社会风险行为的前因研究成果进行了归纳, 进而构建了一个新颖的亲社会风险行为理论模型, 并系统阐述了其大脑神经基础和时间加工进程特点. 未来的研究应进一步明确亲社会风险行为的心理结构, 优化其研究范式, 比较经济与社会决策领域下框架效应的特点及其认知神经机制, 并探索不同方面的因素对亲社会风险行为的影响作用.</p

亲社会风险行为及其理论模型与神经机制

亲社会风险行为(prosocial risky behavior)是指为了他人利益或社会福利做出的冒险行为.因兼具亲社会性和风险性,且经常与消极的风险行为交替发生,亲社会风险行为在日常生活中难以被识别,但在一定程度上表现出了人类积极健康发展的特点.在明确亲社会风险行为概念的来源、界定及其测量方法的基础上,本文借鉴了亲社会行为和风险行为的解释路径,从风险偏好和社会偏好整合加工的视角对人类亲社会风险行为的前因研究成果进行了归纳,进而构建了一个新颖的亲社会风险行为理论模型,并系统阐述了其大脑神经基础和时间加工进程特点.未来的研究应进一步明确亲社会风险行为的心理结构,优化其研究范式,比较经济与社会决策领域下框架效应的特点及其认知神经机制,并探索不同方面的因素对亲社会风险行为的影响作用

大连极紫外相干光源

先进光源的发展在前沿科学研究中发挥的作用越来越重要。近十年来,飞速发展的自由电子激光技术为科学家们提供了探索未知世界、发现新科学规律和实现技术变革的重要工具。建成的大连极紫外(EUV)相干光源的运行波段为50~150nm,单脉冲能量大于100μJ,且可提供10-12 s和10-13 s量级的超快激光脉冲,是我国第一台自由电子激光用户装置,并且是国际上唯一运行在极紫外波段的自由电子激光用户装置,在世界范围内为用户提供具有高峰值亮度和超短脉冲的极紫外激光。大连EUV相干光源是由国家自然科学基金委资助、由中国科学院大连化学物理研究所和上海应用物理研究所共同承担的重大科学仪器研制项目,目标是打造一个以先进极紫外光源为核心、主要用于能源基础科学研究的光子科学平台

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies