Repair of Second-Generation Recycled Fine Aggregate of Waste Concrete from Freeze-Thaw Environment by Carbonation Treatment

The reuse of waste recycled concrete from harsh environments has become a research hotspot in the field of construction.This study investigated the repair effect of carbonation treatment on second-generation recycled fine aggregate(SRFA)obtained from recycled fine aggregate concrete(RFAC)subjected to freeze-thaw(FT)cycles.Before and after carbonation,the properties of SRFA were evaluated.Carbonated second-generation recycled fine aggregate(CSRFA)at five substitution rates(0%,25%,50%,75%,100%)to replace SRFA was used to prepare carbonated second-generation recycled fine aggregate concrete(CSRFAC).The water absorption,porosity and mechanical properties of CSRFAC were tested,and its frost-resisting durability was evaluated.The results showed after carbonation treatment,the physical properties of SRFA was improved and met the requirements of II aggregate.The micro-hardness of the interfacial transition zone and attached mortar in CSRFA was 50.5%and 31.2%higher than that in SRFA,respectively.With the increase of CSRFA replacement rate,the water absorption and porosity of CSRFAC gradually decreased,and the mechanical properties and frost resistance of CSRFAC were gradually improved.Carbonation treatment effectively repairs the damage of SRFA caused by FT cycles and improves its application potential.

Effect of High Temperature Curing on the Frost Resistance of Recycled Aggregate Concrete and the Physical Properties of Second-Generation Recycled Coarse Aggregate under Freeze-Thaw Cycles

With the emphasis on environmental issues,the recycling of waste concrete,even recycled concrete,has become a hot spot in the field of architecture.But the repeated recycling of waste concrete used in harsh environments is still a complex problem.This paper discusses the durability and recyclability of recycled aggregate concrete(RAC)as a prefabricated material in the harsh environment,the effect of high-temperature curing(60℃,80℃,and 100℃)on the frost resistance of RAC and physical properties of the second generation recycled coarse aggregate(RCA_(2))of RAC after 300 freeze-thaw cycles were studied.The frost resistance of RAC was characterized by compressive strength,relative dynamic elastic modulus,and mass loss.As the physical properties of RCA_(2),the apparent density,water absorption,and crushing value were measured.And the SEM images of RAC after 300 freeze-thaw cycles were shown.The results indicated that the frost resistance of RAC cured at 80℃ for 7 days was comparable to that cured in the standard condition(cured for 28 days at 20℃±2℃ and 95%humidity),and the RAC cured at 100℃ was slightly worse.However,the frost resistance of RAC cured at 60℃ deteriorated seriously.The RAC cured at 80℃ for 7 days is the best.Whether after the freeze-thaw cycle or not,the RCA that curd at 60℃,80℃,and 100℃ for 7 days can also meet the requirements of Grade III RCA and be used as the aggregate of non-bearing part of prefabricated concrete components.RCA_(2) which is cured at 80℃ for 7 days had the best physical properties.

From regulation to official integration: the progress of cupping therapy in Qatar

World Health Organization(WHO)reported that the integration of some traditional medicine practices with national main stream health system was started since the 1970s[1].WHO developed and published two strategies regarding traditional and complementary medicine,which were WHO strategy for traditional medicine 2002–2005 and WHO strategy for traditional medicine 2014–2023[2,3].

Spatial spillover effects of official development assistance on environmental pressure in sub-Saharan African(SSA)countries

Impoverished sub-Saharan Africa(SSA)is under increasing environmental pressure from global environmental changes.It is now generally accepted in academic circles that economic development in SSA countries can cause environmental pressure in other countries.However,there is research gap on the impact of economic assistance on environmental pressure in SSA countries and whether economic assistance causes spatial spillovers of environ-mental pressure between SSA countries.To better understand the impact of economic assistance on environmental pressures in SSA,a dynamic spatial Dubin panel model was developed.It helped us explore the spatial spillover effects of economic assistance on environmental pressures in recipient countries based on the panel data from 34 SSA countries.The results show that economic assistance had a positive stimulating effect on environmen-tal pressures of recipient countries,which means that the degree of human disturbance to the environment has deepened.Due to the regional correlation effect,neighboring countries were saddled with environmental pres-sures from the target country.Moreover,environmental pressures have time inertia,which can easily produce a snowball effect.The decomposition of effects shows that the impact of economic assistance on environmental pressures is relatively minor.Environmental pressures have spillover effects,so to deal with diffuse risks,joint regional prevention and control policies should be developed.

Tourism Officials Turn to Social Media

Recent years have seen a growing number of local officials choosing to promote their areas as influencers In the digital age,online celebrities attract public attention and influence followers more easily on issues such as what to buy and where to go.The latest trend spreading among civil servants:becoming social media influencers to promote their hometowns.

The Construction of PLA Image in China’s Official Discourse From the Perspective of Positive Discourse Analysis——Based on Government Work Reports Over the Last 15 Years

Government Work Report is essential for domestic and international understanding of China’s national conditions.This paper selects the national defense section in Government Work Reports released by the State Council of the People’s Republic of China over the last fifteen years from 2009 to 2023 as an example of China’s official discourse.From the perspective of positive discourse analysis,the theory of three meta-functions of language proposed by M.A.K.Halliday in Systemic Functional Linguistics is used in this article in terms of transitivity,appraisal,mood,modality,and theme to explore the constructing of the People’s Liberation Army(PLA)image.This study finds that,by using the goals and circumstances with optimistic meaning in material processes,adopting more appreciation in attitude,applying more declaratives in mood,utilizing modal operators with high modulation,and implicit objective modal adjuncts,and employing government-focused themes,China’s official discourse objectively and authentically conveys a positive image of the brave and just PLA both at home and abroad which advocates itself to peace-keeping,and mission-fulfilling.

社交媒体中悼念普通人行为研究——以“墨茶official事件”为例

社交媒体为悼念行为提供了新的可能。本文以“墨茶official事件”为例,使用python爬虫采集了2021年1月1日至2022年10月9日墨茶official发布的最后一条B站动态下的根评论数据,分析并阐释社交媒体时代对普通民众的悼念行为。研究认为,同情情感是普通民众能够成为悼念对象且使公众发生悼念行为的主要原因。这一情感依托于人物的悲情形象而实现,公众会随着媒介叙事下人物形象的转变对悼念对象产生不同的道德评价,由此可能产生不同主体情感上的冲突。在悼念过程中,媒体和公众都应注重对逝者权益的维护。

Chinese Shale Gas Exploration Started Officially and Primary Results Achieved

Shale gas is a new, clean and efficient unconventional oil and gas resource, and it has become a new highlight of global oil and gas exploration and exploitation. In recent years, the Ministry of Land and Resources of The People＇s Republic of China launched the program Investigation and Evaluation of China Shale Gas Resources and Favorable Areas Preferred, which has evaluated the shale gas resource potential and selected potential areas for exploration and exploitation.

网络公共事件中情感治理的一种路径——以“墨茶official”事件为例

情感治理是社会治理的重要部分,对负面情绪的治理是当下情感治理的重点之一。在"墨茶official"事件中,网络中的哀悼者们通过"悲情叙事"引发共情和认同,形成了带有负面情绪的情感共同体。文章认为,从实践来看,对该群体进行的情感治理实际上是由媒体机构、政府和网民共同参与的多元化治理。政府和媒体机构用提供事实的方式,唤起网民的理性,形成情感共同体内部的"自净",并鼓励由共情形成的利他行为。这种"柔性治理"+"多主体协调治理"的方式,可以看作情感治理中的一种路径。

Chinese version of NCCN Clinical Practice Guidelines in Oncology officially authorized by NCCN

The publishing conference of the Chinese version of National Comprehensive Cancer Network （NCCN） Clinical Practice Guidelines in Oncology （hereinafter referred to as NCCN Guidelines） and the inaugural peer reviewer meeting of NCCN Clinical Practice Guidelines in Oncology： Digestive System Cancers （hereinafter referred to as NCCN Guidelines on Digestive System Cancers） were held in People＇s Medical Publishing House in January 28^th, 2016 （Figure 1）.

Alternating-current losses in two-layer superconducting cables consisting of second-generation superconductors coated by U-shaped ferromagnetic materials

Alternating-current losses in a two-layer superconducting cable, each layer being composed of 15 closely-spaced rectangular wires made up of second-generation superconductors when the ends of wires are coated by either a non-magnetic or strong ferromagnetic material having a U profile is numerically investigated. Computations are carried out through the finite-element method. The alternating-current losses do not increase significantly if the relative permeability of the coating is increased three orders of magnitude, provided that the current amplitude is less than half of the critical current in a superconducting wire. However, the losses are much higher for ferromagnetic coating if the amplitude of the applied current oscillating at 50 Hz is close to the critical current. The ferromagnetic coating is seen to accumulate the magnetic field lines normally on its surfaces, while the field lines are parallel to the long axes of the wires, leading to more significant flux penetration in the coated regions. This facilitates a uniform low-loss current flow in the uncoated regions of the wires. In contrast, coating with a non-magnetic material gives rise to a considerably smaller current flow in the uncoated regions, whereas the low-loss flow is maintained in the coated regions. Moreover, the current flows in opposite directions in the coated and uncoated regions, where the direction in each region is converse for the two materials.

FUZZY SYNTHETICAL EVALUATION ON THE GOVERNMENT OFFICIALS’ CONSCIOUSNESS ON THE IPE BASIS

Government policy is the key to the development of the individual and private economy (IPE).In the making of a policy, the social consciousness of government officials is one of the important factors to affect the policy made. Since the social consciousness on the development of IPE varies from person to person, it is conventionally indefinite and fuzzy. This paper applies fuzzy sets to analyse the government officials’ social consciousness on the IPE basis.

Research on the Relationship between Little Village Official's Career Choice and Human Capital,Social Capital

The career planning plays an important role in little village official's development. The study uses stata SE12 statistical software based on the sample survey of little village official in China. And it studies the relationships of human capital,social capital and career planning of little village official. It shows that:( i) After the village work,to be civil servant is the preferred way for little village official,and the female and unmarried choosing this are more than others. The probability of taking the civil service exam diminishes with age,but increases with the increasing human capital and social capital.( ii) Working in institution is the second choice of little village official. The female,married and older have greater proportion than the others. The trend is diminishing with increased human capital and social capital.( iii) The male,married,older,or little village officials employed by provincial government or working in the central and western regions of China choosing to be selected as township deputies are more than others.( iv) The married and older would like to remain in office,but this probability diminishes with the increased human capital and social capital.( v) The male,older,or the little village official working in the central region,employed by municipal government and employed by county government would like to start up their own businesses.( vi) Few of them choose their jobs by themselves,continue further education,or choose enterprise work and social work. There are more little village officials graduating from " 985 project" or " 211 project" universities choosing to work in enterprises.

Management of Official Overseas Trips of Staff in Agri-scientific Research Institutions

Taking Tropical Crops Genetic Resources Institute( TCGRI) of Chinese Academy of Tropical Agricultural Sciences( CATAS) as an example,this paper discussed current situation of management of official overseas trips of staff in agric-scientific research institutions,analyzed existing problems,and finally came up with pertinent recommendations.

Research on the Achievement Motivation of the University Student Village Officials in the Suburbs of Beijing

[Objective] The aim was to explore the achievement motivation of the university student village officials in the suburbs of Beijing.[Method] The research made an investigation on 429 university student village officials in the suburbs of Beijing by the Achievements Motive Scale(AMS).[Result] The achievement motivation of these student village officials was not on a high level,but they tended to pursue the success motivation rather than the motivation to avoid failures obviously.There was a significant difference in the achievement motivation between different genders,majors and jobs.The males' motivation for success was higher than the females'.The motivation of avoiding failures among officials in Humanities was higher than in Science and in Fine Art.And the university student village officials in professional and technical posts or in business posts rated the motivation to avoid failures more important than in basic management posts.But achievement motivations in different urban-rural areas,educational levels,political backgrounds,whether student leaders or not,and durations were no definite differences.Besides,it had a significant effect on these student village officials' achievement motivation whether advices and suggestions were accepted;if yes,the motivation was higher.[Conclusion] This study had provided stability and development for building rural talent groups.

New Institutional Mechanism in China Facilitating the Global Sustainability——Environment to Be Counted in Officials' Performance Rating

Having argued the importance of China's sustainable development in global sustainability, the authors review the achievements of China in sustainable development, especially its institutional construction. Environment to be counted in official's political performance rating system is thought of as a new institutional mechanism in China facilitating its sustainable development and then global sustainability. Then its significance is narrated and visions in future are envisioned. In the end, certain concrete suggestions for the rating system are given in a practical way.

Application of the Probability Model for Starting Period to Initiate to Take Palivizumab by Prefecture Using National Official Sentinel Surveillance in Japan

Background: Palivizumab were used for the premature infant or a high-risk infant with congenital heart disease. However, recently outbreak pattern of respiratory syncytial (RS) virus infection has been varying year by year. Moreover, it also has some regional difference. Therefore, the object of the present study was to develop early detection of the timing of that outbreak had started in each prefecture. Method: We used data in National Official Sentinel Surveillance for Infectious Diseases (NOSSID). Study period was March 16th, 2011 to December 30th, 2018. We defined stating period to initiate to take palivizumab as 8 - 12 weeks before from the peak of outbreak. We estimated whether the week is included in starting period or not from April 1st to the peak of outbreak by the past number of patients of RS virus infection on week and its squared. Additionally, we have to take delay in NOSSID into consideration. Results: In nationwide, the last two seasons, the model predicted precisely the starting period. At prefectural level, the model predicted the starting period precisely in 16.6% of all year and prefectures pairs. When we consider the delay in NOSSID into consideration, the patients can start to take in 14.9% of all year and prefectures pairs. Discussion and Conclusion: The result of the probability model was not good, and thus we have to develop more sophisticated model for prediction at prefecture level.

An Analysis of College-graduate Village Official Policy in China

The article analyzes the target group,the objective and the main content of college-graduate village official policy. The stipulation about recruitment,obligation,training and living support concerning these village officials is analyzed in this article as well. It is obvious that the current policy targets and policy content have many advantages,but the policy makers should also find out its shortcomings at the same time. In order to cope with these shortcomings,the policy makers should readjust the policy target and construct the feedback-control mechanism of the policy.

Mutagenic Effects of Spaceflight Treatment on the Second-Generation Seeds of Alfalfa

[ Objective] To explore the effects of spaceflight on the second-generation seeds of alfalfa and provide a theoretical basis for mutation breeding. [Method] The seeds of Medicago stavia L. lines no. 1, no. 2 and no. 4 were carried into space by the Shijian-8 seed breeding satellite for a 15-d spaceflight treatment. After returning to the ground, seedlings were transplanted to field. Traits of the second-generation seeds of alfalfa were evaluated. [Result] The 1 000-grain weight of the second-generation seeds were 5% -9% significantly higher than that the control （P 〈 0.05）. The germination rate, seedling weight, shoot length and root length were significantly increased （P 〈 0.05）. The hard seed rate and the rate of moldy seeds were significantly decreased （ P 〈 0.05）. However, the rate of dead seeds was increased. [ Conclusion] Spaceflight treatment has positive mutagenic effects on the second-generation seeds of alfalfa.

Mandrakelinux 10 Official的桌面新魅力

目前在Linux桌面领域，基本上是Fedora，SuSE和Mandrake呈三足鼎立之势。作为Red Hat 9．0的后续版本，Fedora自然得到了很多Red Hat拥护者的追捧，其Fedora Corel就得到了很多用户的好评和拥护，Fedora Core2最终版本的测试和开发也已经接近了尾声。