Milestone progress of the HEPS booster commissioning

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.

Science and Technology Commissioners Supporting High-Quality Development Project for Hundreds of Counties, Thousands of Towns, and Myriads of Villages in the Context of Rural Revitalization

This paper discusses the important role of science and technology commissioners in the high-quality development of hundreds of counties,thousands of towns,and myriads of villages in the context of rural revitalization,including building bridges,accelerating the transformation of achievements,promoting the value-added of the whole agricultural industry chain,and promoting the rapid development of rural industrial economy.It also discusses the working achievements of science and technology commissioners,in order to promote further development of rural revitalization in Guangdong Province.

Design and commissioning of Brav measurement system for SC200 superconducting cyclotron

The SC200 proton therapy superconducting cyclotron was developed by ASIPP (Hefei, China) and JINR (Dubna, Russia). A measurement system was designed to assess the average radial component of the magnetic field (Brav) with 15 search coils in the median plane. The winding differences of the search coils affect the measurement accuracy of the Brav. Based on the electromagnetic induction principle, to measure the Brav accurately, this paper focuses on the design and commissioning of the Brav measurement system. The preliminary results confirm that the system design is reasonable and suitable. After testing the search coil at different speeds, the optimal speed was determined as 2.5 mm/s. The relative error was approximately 0.1% under the maximum radial component of the magnetic field Br of 7 G. The measurement precision was up to 1.0×10^-3, which can provide the required measurement tolerance of 3–7 G for Br in the median plane. The commissioning of the Brav measurement system is an important step for Br measurement. It can check and adjust the asymmetry of the superconducting coils (SCs).

Building a New Socialist Countryside, Improving Commission and Agent System of “Village-level Accounting”

Rural finance is an issue concerned with rural people, improving rural financial management is important to close the relations of cadres and masses, maintain rural stability, and promote rural economic development. This article explained the main problems of village financial, the needs of introducing commission and agent system of ＂village-level accounting＂ for building a new socialist countryside, and the measures of improving commission and agent system of ＂village-level accounting＂.

Baosteel's No.8 air separation unit and the practice of its system commissioning

This paper introduces the process flow, technical parameters and relevant features of Baosteel＇s No. 8 air separation unit （ASU） with a capacity of 60000m^3/h. It summarizes the commissioning work, which includes the adjustment of the air compressor,the system＇s naked cooling,the precooling system and the operation adjustment. It also provides detailed analyses on some failures which occurred in the commissioning. Through the modification of the design and the interlocks, the tripping probability of the air compressor was greatly reduced. Through the heating of the system and the control of the water cooler＇s nitrogen flow,the overproof content of carbon dioxide and fluctuation of oxygen flow were avoided. Nitrogen-block in the argon system was eliminated by the precise control of the argon rectification flow and argon content. All these solutions have been proved to be effective by practice.

Design and Realization of Information System for Ningxia Sci-tech Special Commissioners

The information system for Ningxia sci-tech special commissioners is an application system for realizing information collection,management and sharing in the entrepreneurial process of sci-tech special commissioners. This paper introduces overall design ideas,system functions,key technologies and realization methods of the information system for Ningxia sci-tech special commissioners. Completion of construction and coming into operation of the information system bring new breakthrough for information management and data statistics of sci-tech special commissioners.

Commissioning Status of NSLS-II Vacuum Control System

The NSLS-II （National Synchrotron Light Source II） is a state-of-the-art 3 GeV third generation light source currently under integrated testing and commissioning at Brook_haven National Laboratory. The vacuum systems are monitored by vacuum gauges and ion pump current. The gate valves are controlled by PLC （programmable logic controllers） using voting scheme. EPICS （Experimental Physics and Industrial Control System） application codes provide the high level monitoring and control through the input-output controllers. This paper will discuss the commissioning status of the various aspects of vacuum control system.

Commissioning of the TrueBeam STx 6 MV FFF Beam in the RayStation Treatment Planning System for SRS and SBRT Treatments

Purpose: The purpose of this study is to provide technical information on commissioning the TrueBeam STx 6 MV flattening-filter free (FFF) beam in the RayStation treatment planning system (TPS) for stereotactic radiosurgery (SRS) and stereotactic body radiation therapy (SBRT) treatments. Methods: For beam modeling, percent depth dose curves, profiles and output factors for jaw-collimated fields and stereotactic cones as well as X-jaws transmission were measured. For multi-leaf collimator (MLC) modeling, MLC model parameters such as offset, gain, curvature, leaf tip width, tongue and groove and transmission were determined and output factors for MLC-collimated fields were measured. Absolute dose calibration was also performed. For beam model and MLC model validation, the American Association of Physicists in Medicine Task Group-119 plans, clinical SRS and SBRT plans and end-to-end testing were performed. Results: Beam characteristics of the 6 MV FFF beam agreed well with those in the literature. Validation results showed that our beam model and MLC model were acceptable for SRS and SBRT treatments. Conclusions: The technical information and dosimetric data provided in this study will be a useful reference for other clinics/institutions which will commission the same machine energy in the RayStation TPS.

Dataset for Beam Commissioning of the Vero4DRT System

We present the results of measurements made using the Vero4DRT radiation therapy system, which is not yet widely used, to assist technicians in achieving reliable and safe radiotherapy to the patient. We measured percent depth dose, beam profile, and relative scatter factor under water and air conditions. The Vero4DRT system has a 150 × 150-mm fixed secondary collimator. Its multileaf collimator (MLC) design is a single-focus type, with 30 pairs of 5 mm thick leaves at the isocenter, and produces a maximum field size of 150 × 150 mm. Profile measurements were performed using a 0.016-cm3 ionization chamber (PTW31016 pinpoint chamber;PTW, Freiburg GmbH Germany). A brass build-up cap was used for measurements obtained in air conditions. We present a useful measurement dataset for users of the Vero4DRT system.

Commissioning and operation of the cryostat for 3W1 SC wiggler

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.

Status of the Russian Human Rights Commissioner in the Russian State Power System and Practice of Human Rights Protection

In the 1990 s,Russia set up its system of human rights commissioners Although it does not have a long history,the system has been basically established,and it has played an important role in promoting the protection of human rights and social development in Russia,as well as responding to unfriendly comments from the international community At the same time,Russia’s system of human rights commissioners remains insufficient in compulsory execution,the division of functions and powers,sources of funding,legal status,and operational efficiency These problems originate from deficient organizational design and external factors,including historical conditions,domestic politics,and international politics In the near future,Russia should strive to improve and develop its system of human rights commissioners under the cautious consideration of both internal and external factors.

基于科研诚信专员制度的图书馆科研诚信服务研究

高校科研诚信建设涉及主体众多,需要图书馆协同参与。从科研诚信专员制度入手,探讨了依托图书馆设立科研诚信专员岗位的必要性与可行性,并针对科研诚信问题发生前、中、后3个不同时期,探讨了图书馆进行科研诚信服务的途径;为进一步推动图书馆依托科研诚信专员职能提供科研诚信服务,提出了应采取的措施:一是依托图书馆设立科研诚信专员岗位,完善相关制度;二是以科研诚信教育为基石,着重发挥图书馆咨询协调作用;三是主动探索学习,加强科研诚信专员培训。

融入科技特派员制度的农林类专业实践教学体系建设——基于福建云霄杨桃科技小院案例的研究

在实施科技特派员制度的背景下,高校与科技特派员项目服务所在的乡村和企业经营主体签订实践教学基地建设合作协议,搭建农林类专业实践教学平台,是培养服务“三农”人才的重要渠道。在对福建云霄杨桃科技小院案例进行研究的基础上,着重从优化实践课程体系、改革实践教学内容、充实实践教学队伍、丰富实践教学形式、强化实践教学管理等方面对融入科技特派员制度的农林类专业实践教学体系建设进行了探索,并对实践成效进行了总结。

融入科技特派员制度的农林类专业实践教学评价体系研究——基于CIPP-AHP的研究方法

以科技特派员制度的实施为背景,采用CIPP和AHP相结合的方法对农林类专业实践教学过程中涉及到的相关指标进行分析,并计算权重,根据依此确立的指标体系指导农林类专业实践教学。研究结论:应从确立以实践成果为导向的实践教学理念、加强基础条件建设、优化实践课程教学体系建设和提升实践运行能力等四个方面进行融入科技特派员制度的农林类专业实践教学建设路径探索。

科技特派员制度助力乡村人才振兴的路径探索

乡村人才振兴是实现农业现代化和乡村全面振兴的必然之举。然而目前在乡村人才使用过程中,存在“引才、育才、用才、留才”等方面的困境。科技特派员作为一支服务“三农”的人才队伍,能够提升乡村人才的反哺导向力、激发乡村人才的本土培育力、增强乡村人才平台的服务力以及提升乡村人才环境的吸引力。针对乡村人才振兴困境,可以从优化选聘机制、改进育人机制、健全服务机制、强化保障机制等方面探索科技特派员制度助力乡村人才振兴的路径。

Perceived stress among staff in Saudi Arabian dental colleges before and after an accreditation process: A cross-sectional study

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.

美国数字经济的发展经验及启示——以江苏省为例

江苏作为我国数字经济发展水平相对发达的地区,数字经济发展已取得了较显著的成效,但在数字核心技术研发和创新水平、高端人才储备和培养、数据开放程度等方面还存在明显不足,亟待进一步借鉴先进国家和地区的经验。作为数字经济强国,美国数字经济发展水平稳居世界首位,研究并借鉴其数字经济的发展经验,进而将其应用于江苏及我国其他地区数字经济发展实践,既有利于江苏更好地贯彻落实中央关于发展数字经济的战略部署,将江苏早日建成为我国数字经济创新发展的新高地,也有利于进一步提升江苏和我国其他地区数字经济的发展实力和国内外竞争力。本文基于江苏省数字经济发展现状及问题,借鉴美国经验推动数字经济发展需围绕数据技术和应用创新、数字基础设施建设、数字化人才引培、数字贸易领域中国规则制定、数字经济领域开放合作深入等方面发力。

我国科技特派员制度的CiteSpace可视化分析

运用CiteSpace软件对1999—2024年539篇科技特派员制度相关研究文献进行可视化分析,绘制文献时序分布、发文作者、发文机构、关键词等知识图谱。结果显示,我国科技特派员制度研究分为初始起步、平稳推进和创新深化3个发展阶段;许多作者、团队之间合作关系还不够紧密;发文核心机构群尚未形成;研究热点聚焦于科技特派员制度的价值意蕴、运行机制、推广模式、政策分析、绩效评估和发展对策6个主题;研究前沿与我国“三农”发展密切关联。未来研究应丰富理论视角,构建科技特派员制度研究话语体系;进一步深化和拓展科技特派员制度相关经验和启示,补充地区适用性研究;紧跟新时代农业农村发展步伐,以满足当下农民实际需求为出发点和落脚点。

Electrical Installation Safety Assessment of Buildings in Kumasi, Ghana

This study aims to evaluate the safety status of electrical installations in residential and commercial buildings within the Suame ECG strategic business unit, Ghana, focusing on compliance with international and Ghanaian wiring standards. The research assesses key factors influencing safety, including the certification of electricians, the quality of cable brands used, proper cable sizing, adherence to wiring color codes, the awareness and use of Residual Current Circuit Breakers (RCCBs), and the protection of earth electrodes. A descriptive research design was utilized, involving extensive field surveys and electrical installation audits. Data were collected using standardized tools and analyzed with SPSS software to evaluate the professional competencies of artisans and their adherence to safety standards. The findings indicate significant safety risks, with 69.7% of electricians lacking proper certification, leading to the widespread use of non-approved cable brands, improper cable sizing, and deviations from wiring color codes. Additionally, deficiencies were found in the awareness and use of RCCBs and the protection of earth electrodes. The study concludes with recommendations to enhance electrical safety, including mandatory certification for electricians, public awareness campaigns, regular inspections, and ongoing training and development programs. These measures are crucial for improving the overall safety and quality of electrical installations in the Suame area, Ghana.

Water Cooperation Priorities in the Lancang-Mekong River Basin Based on Cooperative Events Since the Mekong River Commission Establishment

The Lancang-Mekong River has attracted much attention from researchers, but the cooperation on water issues in this river basin has been limited, even after the establishment of the Mekong River Commission(MRC). Cooperation on water resources has been determined as one of the key priority areas in the Lancang-Mekong Cooperation Mechanism, but there are no details of targets. In order to establish the priorities of water cooperation under the mechanism, we adopted nine categories to classify the objectives of 87 water cooperation events based on the ‘Lancang-Mekong Water Cooperative Events Database' from 1995 to 2015. Based on the occurrence of cooperative events, cooperative objectives, cooperative scales, and approaches to cooperation, we conducted statistical, correlation, and text analyses. Our analyses indicated the following results: under the impact of economic conditions inside and outside the river basin, full cooperation appeared more difficult than bilateral and multilateral cooperation. Each of the partners adopted different preferences for cooperation targets. Cooperation with more definite objectives was easier to establish than cooperation with broader and more complex objectives. The potential objectives for water cooperation were navigation, hydropower, joint management, data sharing, flood control and water use. Because hydropower development is controversial, and because water cooperation is avoided by most existing regional cooperation mechanisms due to its complexity, we suggest the following priority areas for water cooperation in the Lancang-Mekong River Basin. 1) Navigation and flood control/drought relief are attractive objectives for all the riparian countries across the whole watershed. 2) Data sharing should be a priority for cooperation in the watershed due to its laying the foundation for the equitable and reasonable utilization of transboundary waters. 3) Hydropower is an objective best implemented mainly through bilateral cooperation, and on tributaries.