The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the ...The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the electron beam from the Linac and increases its energy to the value required for the storage ring.The full-energy beam could be injected to the storage ring directly or after“high-energy accumulation.”On November 17,2023,the key booster parameters successfully reached their corresponding target values.These milestone results were achieved based on numerous contributions,including nearly a decade of physical design,years of equipment development and installation,and months of beam commissioning.As measured at the extraction energy of 6 GeV,the averaged beam current and emittance reached 8.57 mA with 5 bunches and 30.37 nm rad with a single-bunch charge of 5.58 nC,compared with the corresponding target values of 6.6 mA and 35 nm rad,respectively.This paper presents the physical design,equipment development,installation,and commissioning process of the HEPS booster.展开更多
BACKGROUND Accreditation processes are extensively employed to guarantee the quality of higher education institutions.However,this process can potentially generate a stressful atmosphere for staff,thus impacting their...BACKGROUND Accreditation processes are extensively employed to guarantee the quality of higher education institutions.However,this process can potentially generate a stressful atmosphere for staff,thus impacting their ability to perform optimally under pressure.AIM To examine the knowledge of the National Commission for Academic Assessment and Accreditation(NCAAA)and its effects on perceived stress among dental college staff before and after the program accreditation process.METHODS The present cross-sectional questionnaire-based study included 300 employees from three dental colleges.The same employees had to fill out the questionnaire 1 mo after the NCAAA process.RESULTS Approximately 51.33%of the included employees believed that NCAAA is essential to attract quality students to join the program before and after the program.A total of 44.67%felt that their stress was high before,and 31.33%had low stress levels before and after NCAAA.These findings were statistically significant(P≤0.05).CONCLUSION NCAAA raised the prestige of the institution and specific programmes and increased prospects to attract better students,staff,and money,according to the employees.In addition to their needed teaching,research,and other service responsibilities,this work requires a tremendous amount of faculty effort and may cause them stress.展开更多
A 3W1 superconducting wiggler(SCW)with the pole gap of 68 mm was successfully tested and installed in a BEPC II storage ring in November,2019.The goal of zero liquid helium consumption was achieved,and the cryogenic s...A 3W1 superconducting wiggler(SCW)with the pole gap of 68 mm was successfully tested and installed in a BEPC II storage ring in November,2019.The goal of zero liquid helium consumption was achieved,and the cryogenic system exhibited a 12%residual cooling capacity(approximately 0.69 W@4.2 K).The 3W1-SCW was set to operate at 2.49 T and has been operating for more than seven months.Three instances of magnet quenching occurred during the normal operation.The evaporated helium gas can be recycled to the helium gas recycling system when the pressure in the helium tank is higher than the parameter value(the setpoint of the pressure value is 1.2 bara).The cryogenic system can be recovered within 4 h if sufficient liquid helium is available to inject into the cryostat.展开更多
China’s longest deep-water oil and gas pipeline enters commissioning phase.On June 24,2023,a long-distance submarine pipeline of 20 inches in diameter,as a crucial control project of the second phase of the“Deep Sea...China’s longest deep-water oil and gas pipeline enters commissioning phase.On June 24,2023,a long-distance submarine pipeline of 20 inches in diameter,as a crucial control project of the second phase of the“Deep Sea No.1”ultra-deepwater gas field,entered its commissioning phase.It will be connected to the subsea production system,laying a foundation for the full-line operation of the pipeline.The pipeline was completed on June 22,with a total length of 115.5 kilometers and made up of 9,425 sections of steel pipe.As the longest deep-water oil and gas pipeline in China,it will serve as the main conduit for transporting oil and gas for the second phase of the“Deep Sea No.1”project.展开更多
手术错误是手术室特有的严重差错事故之一，2004年美国医学会调查结果显示，错误手术部位居全国医疗差错事故首位。美国医疗机构评审联合委员会（Joint Commission on Accreditation of Healthcare Organizations，JCAHO）认为，所有的...手术错误是手术室特有的严重差错事故之一，2004年美国医学会调查结果显示，错误手术部位居全国医疗差错事故首位。美国医疗机构评审联合委员会（Joint Commission on Accreditation of Healthcare Organizations，JCAHO）认为，所有的错误手术都是可以且必须预防的，因此它把“正确的病人，正确的手术部位，正确的手术程序”作为安全目标之一。展开更多
国际医院联合委员会评审标准（Joint Commission International Accreditation Standards for Hospital,简称JCI标准）,是一种评价医疗机构质量与管理的国际标准,亦是WHO国际患者安全目标的解决方案[1].跌倒可导致患者不同程度的伤害,...国际医院联合委员会评审标准（Joint Commission International Accreditation Standards for Hospital,简称JCI标准）,是一种评价医疗机构质量与管理的国际标准,亦是WHO国际患者安全目标的解决方案[1].跌倒可导致患者不同程度的伤害,延长住院时间,增加住院费用,严重时甚至危及患者生命,引发医患法律纠纷可能.展开更多
美国医疗机构联合认证委员会（Joint Commission on Accreditation of Health care Organizations，JCAHO）建立于1951年，是提供评价医疗质量标准的独立的非营利性机构。JCAHO已评价和认证了近21000个美国的医疗组织，是美国权威的医...美国医疗机构联合认证委员会（Joint Commission on Accreditation of Health care Organizations，JCAHO）建立于1951年，是提供评价医疗质量标准的独立的非营利性机构。JCAHO已评价和认证了近21000个美国的医疗组织，是美国权威的医疗行业标准制定和认证的机构。展开更多
近25年来，CT检查数量增加了20倍［1］。但任何科学技术都是一把双刃剑，CT技术亦不例外，在给医疗活动提供便捷之外，同时也带来了潜在的辐射危机。据统计，医源性辐射剂量占全部人造辐射剂量的98．2％［2］，在经济发达的国家CT被认...近25年来，CT检查数量增加了20倍［1］。但任何科学技术都是一把双刃剑，CT技术亦不例外，在给医疗活动提供便捷之外，同时也带来了潜在的辐射危机。据统计，医源性辐射剂量占全部人造辐射剂量的98．2％［2］，在经济发达的国家CT被认为是造成医源性辐射的主要原因［3］。美国科学院（na-tional academy of science，NAS）于2005年发布的BEIR-Ⅶ报告指出，一次常规CT检查辐射剂量大约为10 mSv，而国际放射防护委员会（international commission on radiological pro-tection，ICRP）估算10 mSv辐射剂量可能导致的癌症风险是1/2000，因对临床应用CT检查的剂量控制刻不容缓。世界卫生组织（WHO）和国际放射委员会（IRCP）以及国际医学物理组织（IOMP）联合提出CT检查应遵循“合理使用低剂量”（as low as reasonably achievable，ALARA）原则。低剂量CT（LD-CT）的研究与应用逐渐受到关注。展开更多
当前，健康不公平已成为公共卫生及临床领域较突出的问题[1]；世界卫生组织健康社会决定因素委员会（Commission on Social Determinants of Health，CSDH）报告认为可靠的循证医学证据有助于改善卫生服务中出现的健康不公平现象[2]，...当前，健康不公平已成为公共卫生及临床领域较突出的问题[1]；世界卫生组织健康社会决定因素委员会（Commission on Social Determinants of Health，CSDH）报告认为可靠的循证医学证据有助于改善卫生服务中出现的健康不公平现象[2]，并将系统评价推荐为涉及公平性问题的卫生政策的证据资源[3]；但由于系统评价中常常较少涉及健康公平相关的证据而使对其证据的应用受到限制。展开更多
基金This work was supported by the National Natural Science Foundation of China(No.12005239).
文摘The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the electron beam from the Linac and increases its energy to the value required for the storage ring.The full-energy beam could be injected to the storage ring directly or after“high-energy accumulation.”On November 17,2023,the key booster parameters successfully reached their corresponding target values.These milestone results were achieved based on numerous contributions,including nearly a decade of physical design,years of equipment development and installation,and months of beam commissioning.As measured at the extraction energy of 6 GeV,the averaged beam current and emittance reached 8.57 mA with 5 bunches and 30.37 nm rad with a single-bunch charge of 5.58 nC,compared with the corresponding target values of 6.6 mA and 35 nm rad,respectively.This paper presents the physical design,equipment development,installation,and commissioning process of the HEPS booster.
文摘BACKGROUND Accreditation processes are extensively employed to guarantee the quality of higher education institutions.However,this process can potentially generate a stressful atmosphere for staff,thus impacting their ability to perform optimally under pressure.AIM To examine the knowledge of the National Commission for Academic Assessment and Accreditation(NCAAA)and its effects on perceived stress among dental college staff before and after the program accreditation process.METHODS The present cross-sectional questionnaire-based study included 300 employees from three dental colleges.The same employees had to fill out the questionnaire 1 mo after the NCAAA process.RESULTS Approximately 51.33%of the included employees believed that NCAAA is essential to attract quality students to join the program before and after the program.A total of 44.67%felt that their stress was high before,and 31.33%had low stress levels before and after NCAAA.These findings were statistically significant(P≤0.05).CONCLUSION NCAAA raised the prestige of the institution and specific programmes and increased prospects to attract better students,staff,and money,according to the employees.In addition to their needed teaching,research,and other service responsibilities,this work requires a tremendous amount of faculty effort and may cause them stress.
基金supported in part by the High Energy Photon Source Test Facility and the Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences
文摘A 3W1 superconducting wiggler(SCW)with the pole gap of 68 mm was successfully tested and installed in a BEPC II storage ring in November,2019.The goal of zero liquid helium consumption was achieved,and the cryogenic system exhibited a 12%residual cooling capacity(approximately 0.69 W@4.2 K).The 3W1-SCW was set to operate at 2.49 T and has been operating for more than seven months.Three instances of magnet quenching occurred during the normal operation.The evaporated helium gas can be recycled to the helium gas recycling system when the pressure in the helium tank is higher than the parameter value(the setpoint of the pressure value is 1.2 bara).The cryogenic system can be recovered within 4 h if sufficient liquid helium is available to inject into the cryostat.
文摘China’s longest deep-water oil and gas pipeline enters commissioning phase.On June 24,2023,a long-distance submarine pipeline of 20 inches in diameter,as a crucial control project of the second phase of the“Deep Sea No.1”ultra-deepwater gas field,entered its commissioning phase.It will be connected to the subsea production system,laying a foundation for the full-line operation of the pipeline.The pipeline was completed on June 22,with a total length of 115.5 kilometers and made up of 9,425 sections of steel pipe.As the longest deep-water oil and gas pipeline in China,it will serve as the main conduit for transporting oil and gas for the second phase of the“Deep Sea No.1”project.
文摘手术错误是手术室特有的严重差错事故之一，2004年美国医学会调查结果显示，错误手术部位居全国医疗差错事故首位。美国医疗机构评审联合委员会（Joint Commission on Accreditation of Healthcare Organizations，JCAHO）认为，所有的错误手术都是可以且必须预防的，因此它把“正确的病人，正确的手术部位，正确的手术程序”作为安全目标之一。
文摘国际医院联合委员会评审标准（Joint Commission International Accreditation Standards for Hospital,简称JCI标准）,是一种评价医疗机构质量与管理的国际标准,亦是WHO国际患者安全目标的解决方案[1].跌倒可导致患者不同程度的伤害,延长住院时间,增加住院费用,严重时甚至危及患者生命,引发医患法律纠纷可能.
文摘美国医疗机构联合认证委员会（Joint Commission on Accreditation of Health care Organizations，JCAHO）建立于1951年，是提供评价医疗质量标准的独立的非营利性机构。JCAHO已评价和认证了近21000个美国的医疗组织，是美国权威的医疗行业标准制定和认证的机构。
文摘近25年来，CT检查数量增加了20倍［1］。但任何科学技术都是一把双刃剑，CT技术亦不例外，在给医疗活动提供便捷之外，同时也带来了潜在的辐射危机。据统计，医源性辐射剂量占全部人造辐射剂量的98．2％［2］，在经济发达的国家CT被认为是造成医源性辐射的主要原因［3］。美国科学院（na-tional academy of science，NAS）于2005年发布的BEIR-Ⅶ报告指出，一次常规CT检查辐射剂量大约为10 mSv，而国际放射防护委员会（international commission on radiological pro-tection，ICRP）估算10 mSv辐射剂量可能导致的癌症风险是1/2000，因对临床应用CT检查的剂量控制刻不容缓。世界卫生组织（WHO）和国际放射委员会（IRCP）以及国际医学物理组织（IOMP）联合提出CT检查应遵循“合理使用低剂量”（as low as reasonably achievable，ALARA）原则。低剂量CT（LD-CT）的研究与应用逐渐受到关注。
文摘当前，健康不公平已成为公共卫生及临床领域较突出的问题[1]；世界卫生组织健康社会决定因素委员会（Commission on Social Determinants of Health，CSDH）报告认为可靠的循证医学证据有助于改善卫生服务中出现的健康不公平现象[2]，并将系统评价推荐为涉及公平性问题的卫生政策的证据资源[3]；但由于系统评价中常常较少涉及健康公平相关的证据而使对其证据的应用受到限制。
