The influence of oscillation amplitude on molten pool thermal history,weld morphology characteristics,microstructural evolution,and mechanical properties during laser oscillating welding of QP980 steel was systematica...The influence of oscillation amplitude on molten pool thermal history,weld morphology characteristics,microstructural evolution,and mechanical properties during laser oscillating welding of QP980 steel was systematically investigated.Results show that laser beam oscillation significantly regulates molten pool thermomechanical behavior through optimized spatial energy distribution,thereby enabling microstructural reconstruction and joint performance enhancement.As the oscillation amplitude increases from 0 to 0.8 mm,the molten pool duration extends to 1.7 times the original value,while peak temperature and average cooling rate decrease by 19%and 39%,respectively.This thermal regulation promotes weld surface width expansion from 0.72 to 1.07 mm.The welding mode undergoes a progressive transition from keyhole mode→transitional mode→conduction mode.This transformation effectively suppresses porosity defects,substantially reducing porosity from 1.8%to 0.15%.Microstructural analysis indicates that oscillation modifies the maximum temperature gradient direction within the molten pool,facilitating preferential growth of coarse columnar grains along the welding centerline to establish load-transfer-favorable crystallographic orientations.The synergistic effects of these factors substantially improve joint mechanical properties:lap joint shear load increases by 81.5%(7.6→13.8 kN),and fracture elongation is enhanced by 135%(0.98→2.3 mm).The operational principles of laser oscillation parameters on the welding quality of QP980 steel were elucidated,providing theoretical foundations for joining process optimization.展开更多
Knowing about the far away past is something teenagers are not interested in.They prefer to deal with the present time,their present interactions,and their present life.When they study history of the past,they most of...Knowing about the far away past is something teenagers are not interested in.They prefer to deal with the present time,their present interactions,and their present life.When they study history of the past,they most often do it just to have good grades,not for a personal interest.But this condition can be changed,their interests can be enlarged,so as to include what happened centuries ago,and this can be done with educational proposals that appear to them fun,involving and different from the usual school routines.Over the years,the author has proposed several educational activities that captured the interest and motivated teenagers to put themselves in another time period and understand what happened.The following projects show not only how to make them curious about what happened in the far away past,but through that understanding,know more about themselves,to see themselves as individuals who are able to make a difference also in the present and future times.展开更多
Background:With the rapid development of modern emerging technologies,the ethical dilemmas and social controversies triggered by scientific and technological activities have become increasingly prominent.How to guide ...Background:With the rapid development of modern emerging technologies,the ethical dilemmas and social controversies triggered by scientific and technological activities have become increasingly prominent.How to guide technology for good and prevent and control technological risks has become an important issue of global concern.Research on science and technology ethics is dedicated to integrating ethical theories into governance practices and constructing ethical models that adapt to the development of the times.Methods:This article systematically reviews the six core approaches of scientific and technological ethics thought,including technological autonomy and political philosophy criticism,responsibility ethics and intergenerational obligations,technological intermediation and the integration of life and the world,ethical principles and normative frameworks,participatory governance and ethical practice innovation,as well as domain-specific ethical norms,thereby constructing an ethical analysis framework applicable to medical technology risks.And cross-analysis was conducted by taking medical events such as gene editing and xenotransplantation as examples.Results:Research shows that a single ethical approach has limitations in addressing complex medical ethical challenges,while the six approaches are complementary and synergistic.By criticizing technological autonomy,establishing a responsibility ethics orientation,setting the bottom line of ethical principles,promoting participatory governance,formulating domain norms,and continuously reflecting on the intermediary nature of technology,a multi-level and dynamically adaptive governance system for scientific and technological ethics can be constructed.Conclusion:The key to addressing contemporary medical ethics challenges lies in the comprehensive application of science and technology ethics theories and the integration of ethical considerations throughout the entire process of scientific and technological research and development.In the future,a governance framework that adapts to the development of new technologies should be established to promote cross-cultural and cross-disciplinary ethical dialogue and public participation,ensuring that scientific and technological innovation always serves the dignity of human life and overall well-being.展开更多
The research of General History of Chinese Science and Technology(GHCST) has so far failed to transcend the"positivist history", a program of historiography initiated by Joseph Needham. The historians after ...The research of General History of Chinese Science and Technology(GHCST) has so far failed to transcend the"positivist history", a program of historiography initiated by Joseph Needham. The historians after Needham have made important explorations on the historiographical reform of GHCST. However, nearly all of these explorations are still the methodological reflections of the positivist history perspective, failing to reflect metaphysically on such historiographical presuppositions as views of science, technology and history, which means they have failed to break away from the positivist history perspective. To go beyond the limitations of positivist history calls for the introduction of the perspective of phenomenology of body and reflecting on and criticizing the historiographical presuppositions of positivist history on a metaphysical level. Such reflection will lead us to a new program of historiography in the post-Needham era, that is"phenomenal history"or the GHCST from the perspective of the phenomenology of body.展开更多
1 Research on the History of Chinese Medicine The years 2020 to 2023 are etched in stone for most of the world’s population,an era to feel the world with the body’s sense of pain,a prevail for a time knowledge of th...1 Research on the History of Chinese Medicine The years 2020 to 2023 are etched in stone for most of the world’s population,an era to feel the world with the body’s sense of pain,a prevail for a time knowledge of the pandemic,and a time when physical responses will decide politics.Since the COVID-19 outbreak in 2020,academic exchanges between countries have been hampered;there are signs that globalization is getting to an end.展开更多
1 Introduction.Chinese medicine has a long and rich history,dating back to the classics of the Qin and Han dynasties and extending to the integration of Chinese and Western medicine in the modern era.The vast amount o...1 Introduction.Chinese medicine has a long and rich history,dating back to the classics of the Qin and Han dynasties and extending to the integration of Chinese and Western medicine in the modern era.The vast amount of literature and scholarly works in this field makes it essential to thoroughly study the history of traditional Chinese medicine(TCM)in order to understand its development path throughout the ages and boost innovation based on tradition.This is why the sages emphasized the importance of“classifying the works into different schools and tracing back to their origins”(辨章学术,考镜源流).展开更多
Since the end of the 20th century, Mo Yan has made an attempt to reflect on China＇s historical changes throughout the 20th century as a whole. Centered on such several novels as Big Breasts and Wide Hips, Life and De...Since the end of the 20th century, Mo Yan has made an attempt to reflect on China＇s historical changes throughout the 20th century as a whole. Centered on such several novels as Big Breasts and Wide Hips, Life and Death Are Wearing Me Out and Frog, this paper explores the author＇s thinking of the interruption and repetition phenomena in China＇s 20th century history. Differing from viewing the history in a modem linear progressive perspective, Mo Yan regards the interruption of history as a sign of human degradation, which derives from the loss of folk history subjectivity. When history is treated rudely, its repetition will occur, and the one who treats history as laughingstocks will be written into history as part of a ＂farce＂.展开更多
The Virginian： A Horseman of the Plains （1902） has been considered as one of the masterpieces of American western novels for its successful depiction of cowboys and local customs, which earns Owen Wister the Father...The Virginian： A Horseman of the Plains （1902） has been considered as one of the masterpieces of American western novels for its successful depiction of cowboys and local customs, which earns Owen Wister the Father of Western fiction. The paper aims to reveal the relationship between The Virginian and its historical context by applying the doctrines of New Historicism： historicity of texts and textuality of history. By historicity of texts, it points out that the work is the emblem of disappearance of western frontier, and it symbolizes the union of the Wild West and the civilized east. By textuality of history, it detects the change of social class, the development of livestock industry and railway, and their influence on the work at the later part of 19th century.展开更多
Recent historiographic studies of cultural exchanges between Germany and Greece in the 19th and 20th centuries have tended to neglect the mutual influence of the two countries＇ intellectuals; as a result, there is in...Recent historiographic studies of cultural exchanges between Germany and Greece in the 19th and 20th centuries have tended to neglect the mutual influence of the two countries＇ intellectuals; as a result, there is insufficient appreciation of the extent to which historiography and philosophy were appropriated by the politics of the Interwar period. This article focuses on attempts by neo-Kantian philosophers to overcome the crisis of historicism, and on the impact of this crisis on Greek intellectuals＇ perceptions of historicism. The study shows that at the time historicism invoked the past to solve the problems of the present. My purpose is to show that in a time of crisis, Germany＇s pursuit of its Greekness in conformity with the Bildung tradition, and Greece＇s cultural dependence on Germany in the meaning-making of its own Greekness, shared common ground in the ideological uses of philosophy and history in the service of politics and the politics of culture. In the aftermath of WWI, German scholars raised the issue of the crisis of historicism. Neo-Kantian philosophers such as Heinrich Rickert, whose theory had a major impact on Greek intellectuals, became involved in this debate, posing the question of historical objectivity. Yet Rickert＇s philosophy of history soon fell into an impasse, leading to the rise of an idealist philosophy of history in the 1930s that committed itself anew to the dominant politics. In the 1930s, under the guise of idealism, Greek neo-Kantian intellectuals were claiming an objective historical narrative of the traumatic experience from 1922 onwards, which fit into the structure of an idealized ahistorical and mythic past, and which, as a hegemonic discourse, excluded its political enemies and propagandized the political struggle towards the fulfillment of the nation＇s historical and spiritual mission.展开更多
In the new curriculum reform, historical materials teaching method is becoming more and more important in middle school history teaching. This article is the analysis of materials in two aspects. This paper analyzes t...In the new curriculum reform, historical materials teaching method is becoming more and more important in middle school history teaching. This article is the analysis of materials in two aspects. This paper analyzes the practical signi??cance of historical materials teaching, and points out the problems that should be paid attention to in the teaching of historical materials. Through the analysis of some teaching cases, it can provide practical experience for the better use of historical materials in the later period.展开更多
In the background of the continuous and in-depth education reform in our country, various novel and advanced teaching concepts and methods have been widely applied, which not only significantly improves the teaching q...In the background of the continuous and in-depth education reform in our country, various novel and advanced teaching concepts and methods have been widely applied, which not only significantly improves the teaching quality, but also realizes the in-depth cultivation of students core accomplishment, and embodies the long-term value of education. In order to further improve the senior high school students historical literacy, this paper will mainly study the specific application of historical understanding and explanation in senior high school history education, hoping to provide beneficial help for the optimization and reform of senior high school history education in our country.展开更多
Preserving genetic diversity is crucial for the long-term survival of wild plant species,yet many remain at risk of genetic erosion due to small population sizes and habitat fragmentation.Here,we present a comparative...Preserving genetic diversity is crucial for the long-term survival of wild plant species,yet many remain at risk of genetic erosion due to small population sizes and habitat fragmentation.Here,we present a comparative genomic study of the critically endangered Oreocharis esquirolii(Gesneriaceae)and its widespread congener O.maximowiczii.We assembled and annotated chromosome-level reference genomes for both species and generated whole-genome resequencing data from 28 O.esquirolii and 79 O.maximowiczii individuals.Our analyses reveal substantially lower genetic diversity and higher inbreeding in O.esquirolii,despite its overall reduced mutational burden.Notably,O.esquirolii exhibits an elevated proportion of strongly deleterious mutations relative to O.maximowiczii,suggesting that limited opportunities for purging have allowed these variants to accumulate.These contrasting genomic profileslikely reflectdivergent demographic histories,with O.esquirolii having experienced severe bottlenecks and protracted population decline.Collectively,our findingshighlight the critically endangered status of O.esquirolii,characterized by diminished genetic diversity,pronounced inbreeding,and reduced ability to eliminate deleterious alleles.This study provides valuable genomic resources for the Gesneriaceae family and underscores the urgent need for targeted conservation measures,including habitat protection and ex situ preservation efforts,to mitigate the extinction risk facing O.esquirolii and potentially other threatened congeners.展开更多
Junior high school history curriculum standards have always stressed the importance of the use of historical materials in curriculum teaching. For example, "initially learn to obtain some historical information f...Junior high school history curriculum standards have always stressed the importance of the use of historical materials in curriculum teaching. For example, "initially learn to obtain some historical information from various sources and understand the importance of interpreting history based on historical materials" and "gradually form a historical consciousness of emphasizing evidence and the ability to deal with historical information, gradually improve the ability to understand history, and then master the initial ability to analyze and solve historical problems". After the Third Plenary Session of the 18th CPC Central Committee, the new curriculum standard has been designed in a more comprehensive way with the continuous progress of deepening the reform in an all-round way. The most prominent one is the proposal of "discipline core accomplishment". The core accomplishment of the history discipline includes five aspects: historical materialism, the concept of time and space, historical evidence, historical explanation and feelings of family and country. Among them, the concept that historical evidence is a necessary method to understand history has been re-emphasized.展开更多
It is one of the must-visit history museums,known for its vast collection of historical artifacts,attracting around three million domestic and international visitors each year.THE Shaanxi History Museum(SHM),in the re...It is one of the must-visit history museums,known for its vast collection of historical artifacts,attracting around three million domestic and international visitors each year.THE Shaanxi History Museum(SHM),in the renowned historic city of Xi’an in Shaanxi Province,is often regarded as one of the museums most difficult to get a ticket to in China.Each day,approximately 12,000 free online tickets are made available and are fully booked within just a couple of minutes.Its vast collection of treasured relics and numerous national treasures leave visitors in awe.展开更多
Background:The advent of the self-media age,digital humanities,and artificial intelligence(AI)technologies is gradually reshaping the narrative frameworks of the history of science and technology in general and the hi...Background:The advent of the self-media age,digital humanities,and artificial intelligence(AI)technologies is gradually reshaping the narrative frameworks of the history of science and technology in general and the history of medicine in particular,as it transforms the specific shape of contemporary medical science and health communication practice with the help of interactive,scenario-based communication ecosystems.Methods:This paper focuses on the interactive relationship between the history of science and science communication,employing historical tracing and case study comparison as research methods to explore the pathways and innovative models for reintegrating the history of science and technology including the history of medicine into contemporary scientific discourse.Results:The study finds that in the Chinese context,three key pathways facilitate the engagement of the history of science and technology including the history of medicine in science communication:administrative intervention,value reconstruction,and personalized adaptation.Specifically,administrative intervention promotes the integration of the history of science education into talent development through policy design;value reconstruction,centered on the scientific spirit,enhances societal cultural recognition of technological progress;and personalized adaptation leverages big data and social media technologies to enable precise and tailored knowledge dissemination.Conclusion:The rise of the“web-based knowledge brokering model”in the era of social media has introduced professional knowledge brokers,ensuring the accuracy and accessibility of science communication.These innovations not only serve as decision-making simulation tools for medical science and health communication,linking historical insights with contemporary practice,but also provide theoretical foundations and practical paradigms for realizing the value of the history of science and technology in the digital era.展开更多
Gas chromatography-mass spectrometry(GC-MS)was used to analyze the pentacyclic triterpenoid distributions,specifically hopane and oleanane fingerprints,in 24 crude oil samples from the Niger Delta depobelts,with the a...Gas chromatography-mass spectrometry(GC-MS)was used to analyze the pentacyclic triterpenoid distributions,specifically hopane and oleanane fingerprints,in 24 crude oil samples from the Niger Delta depobelts,with the aim of defining the petroleum system,filling history,and the age of source rock producing these oils.The results indicate that the Niger Delta oils belong to a single fluvio-deltaic petroleum system,reflecting similar source organic facies and depositional environments.Geochemical parameters,including C29/C30hopane ratios,oleanane index,Ts/Tm,(Ts/(Ts+Tm)),moretane/C30hopane ratios,and C3222S/(22S+22R)ratios,suggest oxic conditions during source rock deposition and thermal maturity of the oils.The presence of terrigenous organic matter and complex filling history are also evident and influenced by multiple phases of sedimentation,and petroleum generation.A comparative plot of geologic time(Paleogene-Neogene age)and oleanane percentage composition show that the crude oils are constrained to the chronostratigraphic ages of their respective depobelts,demonstrating the potential of oleanane-derived parameters for relative dating of hydrocarbon sources,complementing traditional index fossil methods.展开更多
Grapevine is unique among crops because its domestication resulted not only in new morphological characteristics,but also in altered reproductive mechanisms.Viticulture involves a change from a dioecious to a hermaphr...Grapevine is unique among crops because its domestication resulted not only in new morphological characteristics,but also in altered reproductive mechanisms.Viticulture involves a change from a dioecious to a hermaphroditic mating system,which makes the reproductive system more efficient.In consequence and the fact that it is one of the oldest and most economically important cultivated plants,Vitis vinifera could be defined as an over-domesticated species.Here we review some key aspects in viticulture.The main areas of interest have remained consistent throughout history,including the origin and characterisation of cultivars,resistance to environmental con-ditions,pests and pathogens,and berry quality.Advances in genomic analysis and epigenetics shed new light on these aspects.Although the vine has a long and complex life cycle,recent haplotype sequencing techniques allow genomic characteristics related to different reproduction processes to be identified.Recent work on haplotype sequencing reveals genomic changes accompanying each reproductive type,providing improved detail about the sex-determining region(SDR).Meanwhile,the application of epigenetic analysis offers new tools for defining varietal characteristics and their responses to changing environmental conditions.However,critical issues,such as differentiating between sylvestris and feral cultivars,remain unclear.Understanding the molecular basis of morphological differences and investigating the epigenetic regulation of gene expression and genome dynamics in response to breeding and environmental factors in this species will be crucial.Seed morphology could help to resolve how to differentiate between wild and feral plants.展开更多
Historical thinking refers to a cognitive activity or process that integrates general thinking with specific thinking activities unique to the history discipline.Historical thinking skills,therefore,represent the abil...Historical thinking refers to a cognitive activity or process that integrates general thinking with specific thinking activities unique to the history discipline.Historical thinking skills,therefore,represent the ability to solve problems demonstrated within the context of historical thinking activities.Cultivating high school students’historical thinking skills requires teachers to familiarize themselves with the fundamental characteristics of students’historical thinking,guide them in deeply understanding the basic concepts and principles of historical thinking,refine their cognitive structures,innovate teaching,learning,and evaluation methods,and stimulate intrinsic motivation for learning.This is not only a vital field of theoretical research in high school history education but also a key aspect of the reform and development of history teaching in secondary schools.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.51805084 and 52474401)Guangdong Basic and Applied Basic Research Foundation(Grant Nos.2023B1515120086 and 2025A1515012873).
文摘The influence of oscillation amplitude on molten pool thermal history,weld morphology characteristics,microstructural evolution,and mechanical properties during laser oscillating welding of QP980 steel was systematically investigated.Results show that laser beam oscillation significantly regulates molten pool thermomechanical behavior through optimized spatial energy distribution,thereby enabling microstructural reconstruction and joint performance enhancement.As the oscillation amplitude increases from 0 to 0.8 mm,the molten pool duration extends to 1.7 times the original value,while peak temperature and average cooling rate decrease by 19%and 39%,respectively.This thermal regulation promotes weld surface width expansion from 0.72 to 1.07 mm.The welding mode undergoes a progressive transition from keyhole mode→transitional mode→conduction mode.This transformation effectively suppresses porosity defects,substantially reducing porosity from 1.8%to 0.15%.Microstructural analysis indicates that oscillation modifies the maximum temperature gradient direction within the molten pool,facilitating preferential growth of coarse columnar grains along the welding centerline to establish load-transfer-favorable crystallographic orientations.The synergistic effects of these factors substantially improve joint mechanical properties:lap joint shear load increases by 81.5%(7.6→13.8 kN),and fracture elongation is enhanced by 135%(0.98→2.3 mm).The operational principles of laser oscillation parameters on the welding quality of QP980 steel were elucidated,providing theoretical foundations for joining process optimization.
文摘Knowing about the far away past is something teenagers are not interested in.They prefer to deal with the present time,their present interactions,and their present life.When they study history of the past,they most often do it just to have good grades,not for a personal interest.But this condition can be changed,their interests can be enlarged,so as to include what happened centuries ago,and this can be done with educational proposals that appear to them fun,involving and different from the usual school routines.Over the years,the author has proposed several educational activities that captured the interest and motivated teenagers to put themselves in another time period and understand what happened.The following projects show not only how to make them curious about what happened in the far away past,but through that understanding,know more about themselves,to see themselves as individuals who are able to make a difference also in the present and future times.
基金supported by the National Key Research and Development Program(Grant No.2024YFA0917200)the Projects of the Chinese Center for Disease Control and Prevention(Grant No.BB2110240093)World Medical History under the Education Innovation Plan of the University of Science and Technology of China(Grant No.2024YCHX07).
文摘Background:With the rapid development of modern emerging technologies,the ethical dilemmas and social controversies triggered by scientific and technological activities have become increasingly prominent.How to guide technology for good and prevent and control technological risks has become an important issue of global concern.Research on science and technology ethics is dedicated to integrating ethical theories into governance practices and constructing ethical models that adapt to the development of the times.Methods:This article systematically reviews the six core approaches of scientific and technological ethics thought,including technological autonomy and political philosophy criticism,responsibility ethics and intergenerational obligations,technological intermediation and the integration of life and the world,ethical principles and normative frameworks,participatory governance and ethical practice innovation,as well as domain-specific ethical norms,thereby constructing an ethical analysis framework applicable to medical technology risks.And cross-analysis was conducted by taking medical events such as gene editing and xenotransplantation as examples.Results:Research shows that a single ethical approach has limitations in addressing complex medical ethical challenges,while the six approaches are complementary and synergistic.By criticizing technological autonomy,establishing a responsibility ethics orientation,setting the bottom line of ethical principles,promoting participatory governance,formulating domain norms,and continuously reflecting on the intermediary nature of technology,a multi-level and dynamically adaptive governance system for scientific and technological ethics can be constructed.Conclusion:The key to addressing contemporary medical ethics challenges lies in the comprehensive application of science and technology ethics theories and the integration of ethical considerations throughout the entire process of scientific and technological research and development.In the future,a governance framework that adapts to the development of new technologies should be established to promote cross-cultural and cross-disciplinary ethical dialogue and public participation,ensuring that scientific and technological innovation always serves the dignity of human life and overall well-being.
基金major project funded by National Social Sciences Foundation(14ZDB017)western project funded by National Social Sciences Foundation(15XZX004)
文摘The research of General History of Chinese Science and Technology(GHCST) has so far failed to transcend the"positivist history", a program of historiography initiated by Joseph Needham. The historians after Needham have made important explorations on the historiographical reform of GHCST. However, nearly all of these explorations are still the methodological reflections of the positivist history perspective, failing to reflect metaphysically on such historiographical presuppositions as views of science, technology and history, which means they have failed to break away from the positivist history perspective. To go beyond the limitations of positivist history calls for the introduction of the perspective of phenomenology of body and reflecting on and criticizing the historiographical presuppositions of positivist history on a metaphysical level. Such reflection will lead us to a new program of historiography in the post-Needham era, that is"phenomenal history"or the GHCST from the perspective of the phenomenology of body.
基金The study is financed from the grant of National Social Science Key Project(No.2018VJX066).
文摘1 Research on the History of Chinese Medicine The years 2020 to 2023 are etched in stone for most of the world’s population,an era to feel the world with the body’s sense of pain,a prevail for a time knowledge of the pandemic,and a time when physical responses will decide politics.Since the COVID-19 outbreak in 2020,academic exchanges between countries have been hampered;there are signs that globalization is getting to an end.
基金financed by the grant from Beijing Social Science(No. 18LSB002)。
文摘1 Introduction.Chinese medicine has a long and rich history,dating back to the classics of the Qin and Han dynasties and extending to the integration of Chinese and Western medicine in the modern era.The vast amount of literature and scholarly works in this field makes it essential to thoroughly study the history of traditional Chinese medicine(TCM)in order to understand its development path throughout the ages and boost innovation based on tradition.This is why the sages emphasized the importance of“classifying the works into different schools and tracing back to their origins”(辨章学术,考镜源流).
文摘Since the end of the 20th century, Mo Yan has made an attempt to reflect on China＇s historical changes throughout the 20th century as a whole. Centered on such several novels as Big Breasts and Wide Hips, Life and Death Are Wearing Me Out and Frog, this paper explores the author＇s thinking of the interruption and repetition phenomena in China＇s 20th century history. Differing from viewing the history in a modem linear progressive perspective, Mo Yan regards the interruption of history as a sign of human degradation, which derives from the loss of folk history subjectivity. When history is treated rudely, its repetition will occur, and the one who treats history as laughingstocks will be written into history as part of a ＂farce＂.
文摘The Virginian： A Horseman of the Plains （1902） has been considered as one of the masterpieces of American western novels for its successful depiction of cowboys and local customs, which earns Owen Wister the Father of Western fiction. The paper aims to reveal the relationship between The Virginian and its historical context by applying the doctrines of New Historicism： historicity of texts and textuality of history. By historicity of texts, it points out that the work is the emblem of disappearance of western frontier, and it symbolizes the union of the Wild West and the civilized east. By textuality of history, it detects the change of social class, the development of livestock industry and railway, and their influence on the work at the later part of 19th century.
文摘Recent historiographic studies of cultural exchanges between Germany and Greece in the 19th and 20th centuries have tended to neglect the mutual influence of the two countries＇ intellectuals; as a result, there is insufficient appreciation of the extent to which historiography and philosophy were appropriated by the politics of the Interwar period. This article focuses on attempts by neo-Kantian philosophers to overcome the crisis of historicism, and on the impact of this crisis on Greek intellectuals＇ perceptions of historicism. The study shows that at the time historicism invoked the past to solve the problems of the present. My purpose is to show that in a time of crisis, Germany＇s pursuit of its Greekness in conformity with the Bildung tradition, and Greece＇s cultural dependence on Germany in the meaning-making of its own Greekness, shared common ground in the ideological uses of philosophy and history in the service of politics and the politics of culture. In the aftermath of WWI, German scholars raised the issue of the crisis of historicism. Neo-Kantian philosophers such as Heinrich Rickert, whose theory had a major impact on Greek intellectuals, became involved in this debate, posing the question of historical objectivity. Yet Rickert＇s philosophy of history soon fell into an impasse, leading to the rise of an idealist philosophy of history in the 1930s that committed itself anew to the dominant politics. In the 1930s, under the guise of idealism, Greek neo-Kantian intellectuals were claiming an objective historical narrative of the traumatic experience from 1922 onwards, which fit into the structure of an idealized ahistorical and mythic past, and which, as a hegemonic discourse, excluded its political enemies and propagandized the political struggle towards the fulfillment of the nation＇s historical and spiritual mission.
文摘In the new curriculum reform, historical materials teaching method is becoming more and more important in middle school history teaching. This article is the analysis of materials in two aspects. This paper analyzes the practical signi??cance of historical materials teaching, and points out the problems that should be paid attention to in the teaching of historical materials. Through the analysis of some teaching cases, it can provide practical experience for the better use of historical materials in the later period.
文摘In the background of the continuous and in-depth education reform in our country, various novel and advanced teaching concepts and methods have been widely applied, which not only significantly improves the teaching quality, but also realizes the in-depth cultivation of students core accomplishment, and embodies the long-term value of education. In order to further improve the senior high school students historical literacy, this paper will mainly study the specific application of historical understanding and explanation in senior high school history education, hoping to provide beneficial help for the optimization and reform of senior high school history education in our country.
基金supported by National Key R&D Program of China(2024YFF1307400)Guangdong S&T Program(2022B1111230001).
文摘Preserving genetic diversity is crucial for the long-term survival of wild plant species,yet many remain at risk of genetic erosion due to small population sizes and habitat fragmentation.Here,we present a comparative genomic study of the critically endangered Oreocharis esquirolii(Gesneriaceae)and its widespread congener O.maximowiczii.We assembled and annotated chromosome-level reference genomes for both species and generated whole-genome resequencing data from 28 O.esquirolii and 79 O.maximowiczii individuals.Our analyses reveal substantially lower genetic diversity and higher inbreeding in O.esquirolii,despite its overall reduced mutational burden.Notably,O.esquirolii exhibits an elevated proportion of strongly deleterious mutations relative to O.maximowiczii,suggesting that limited opportunities for purging have allowed these variants to accumulate.These contrasting genomic profileslikely reflectdivergent demographic histories,with O.esquirolii having experienced severe bottlenecks and protracted population decline.Collectively,our findingshighlight the critically endangered status of O.esquirolii,characterized by diminished genetic diversity,pronounced inbreeding,and reduced ability to eliminate deleterious alleles.This study provides valuable genomic resources for the Gesneriaceae family and underscores the urgent need for targeted conservation measures,including habitat protection and ex situ preservation efforts,to mitigate the extinction risk facing O.esquirolii and potentially other threatened congeners.
文摘Junior high school history curriculum standards have always stressed the importance of the use of historical materials in curriculum teaching. For example, "initially learn to obtain some historical information from various sources and understand the importance of interpreting history based on historical materials" and "gradually form a historical consciousness of emphasizing evidence and the ability to deal with historical information, gradually improve the ability to understand history, and then master the initial ability to analyze and solve historical problems". After the Third Plenary Session of the 18th CPC Central Committee, the new curriculum standard has been designed in a more comprehensive way with the continuous progress of deepening the reform in an all-round way. The most prominent one is the proposal of "discipline core accomplishment". The core accomplishment of the history discipline includes five aspects: historical materialism, the concept of time and space, historical evidence, historical explanation and feelings of family and country. Among them, the concept that historical evidence is a necessary method to understand history has been re-emphasized.
文摘It is one of the must-visit history museums,known for its vast collection of historical artifacts,attracting around three million domestic and international visitors each year.THE Shaanxi History Museum(SHM),in the renowned historic city of Xi’an in Shaanxi Province,is often regarded as one of the museums most difficult to get a ticket to in China.Each day,approximately 12,000 free online tickets are made available and are fully booked within just a couple of minutes.Its vast collection of treasured relics and numerous national treasures leave visitors in awe.
基金The National Key R&D project granted by the Ministry of Science and Technology(2024YFA0917200)Digital Museum Construction Project of Chinese Centre for Disease Control and Prevention(BB2110240080)Science Communication Project of Chinese Academy of Sciences(CX2090000008).
文摘Background:The advent of the self-media age,digital humanities,and artificial intelligence(AI)technologies is gradually reshaping the narrative frameworks of the history of science and technology in general and the history of medicine in particular,as it transforms the specific shape of contemporary medical science and health communication practice with the help of interactive,scenario-based communication ecosystems.Methods:This paper focuses on the interactive relationship between the history of science and science communication,employing historical tracing and case study comparison as research methods to explore the pathways and innovative models for reintegrating the history of science and technology including the history of medicine into contemporary scientific discourse.Results:The study finds that in the Chinese context,three key pathways facilitate the engagement of the history of science and technology including the history of medicine in science communication:administrative intervention,value reconstruction,and personalized adaptation.Specifically,administrative intervention promotes the integration of the history of science education into talent development through policy design;value reconstruction,centered on the scientific spirit,enhances societal cultural recognition of technological progress;and personalized adaptation leverages big data and social media technologies to enable precise and tailored knowledge dissemination.Conclusion:The rise of the“web-based knowledge brokering model”in the era of social media has introduced professional knowledge brokers,ensuring the accuracy and accessibility of science communication.These innovations not only serve as decision-making simulation tools for medical science and health communication,linking historical insights with contemporary practice,but also provide theoretical foundations and practical paradigms for realizing the value of the history of science and technology in the digital era.
文摘Gas chromatography-mass spectrometry(GC-MS)was used to analyze the pentacyclic triterpenoid distributions,specifically hopane and oleanane fingerprints,in 24 crude oil samples from the Niger Delta depobelts,with the aim of defining the petroleum system,filling history,and the age of source rock producing these oils.The results indicate that the Niger Delta oils belong to a single fluvio-deltaic petroleum system,reflecting similar source organic facies and depositional environments.Geochemical parameters,including C29/C30hopane ratios,oleanane index,Ts/Tm,(Ts/(Ts+Tm)),moretane/C30hopane ratios,and C3222S/(22S+22R)ratios,suggest oxic conditions during source rock deposition and thermal maturity of the oils.The presence of terrigenous organic matter and complex filling history are also evident and influenced by multiple phases of sedimentation,and petroleum generation.A comparative plot of geologic time(Paleogene-Neogene age)and oleanane percentage composition show that the crude oils are constrained to the chronostratigraphic ages of their respective depobelts,demonstrating the potential of oleanane-derived parameters for relative dating of hydrocarbon sources,complementing traditional index fossil methods.
文摘Grapevine is unique among crops because its domestication resulted not only in new morphological characteristics,but also in altered reproductive mechanisms.Viticulture involves a change from a dioecious to a hermaphroditic mating system,which makes the reproductive system more efficient.In consequence and the fact that it is one of the oldest and most economically important cultivated plants,Vitis vinifera could be defined as an over-domesticated species.Here we review some key aspects in viticulture.The main areas of interest have remained consistent throughout history,including the origin and characterisation of cultivars,resistance to environmental con-ditions,pests and pathogens,and berry quality.Advances in genomic analysis and epigenetics shed new light on these aspects.Although the vine has a long and complex life cycle,recent haplotype sequencing techniques allow genomic characteristics related to different reproduction processes to be identified.Recent work on haplotype sequencing reveals genomic changes accompanying each reproductive type,providing improved detail about the sex-determining region(SDR).Meanwhile,the application of epigenetic analysis offers new tools for defining varietal characteristics and their responses to changing environmental conditions.However,critical issues,such as differentiating between sylvestris and feral cultivars,remain unclear.Understanding the molecular basis of morphological differences and investigating the epigenetic regulation of gene expression and genome dynamics in response to breeding and environmental factors in this species will be crucial.Seed morphology could help to resolve how to differentiate between wild and feral plants.
文摘Historical thinking refers to a cognitive activity or process that integrates general thinking with specific thinking activities unique to the history discipline.Historical thinking skills,therefore,represent the ability to solve problems demonstrated within the context of historical thinking activities.Cultivating high school students’historical thinking skills requires teachers to familiarize themselves with the fundamental characteristics of students’historical thinking,guide them in deeply understanding the basic concepts and principles of historical thinking,refine their cognitive structures,innovate teaching,learning,and evaluation methods,and stimulate intrinsic motivation for learning.This is not only a vital field of theoretical research in high school history education but also a key aspect of the reform and development of history teaching in secondary schools.
