唐西州时期吐鲁番的桃树栽培——从出土文书及实物证据谈起     

赵美莹  王龙  党志豪  蒋洪恩 《中国科学院大学学报》2020,37(3):405-415

桃是中国重要的水果之一，经丝绸之路西传至古波斯。作为丝路重镇的吐鲁番地区，晋唐时期的桃树栽培是否存在却始终未能确定。《吐鲁番出土文书》中曾出现"桃"字，学界对其释读说法不一，主要分为"无桃说"和"有桃说"两种观点。本文从历史记载和实物证据两方面入手，结合《吐鲁番出土文书》及吐鲁番木尔吐克萨依戍堡出土的桃核遗存，通过文献梳理、年代测定和植物学鉴定等研究，认为至迟在唐西州时期，吐鲁番地区已经存在桃树栽培。  相似文献   

佉卢文书所见鄯善王施政特点     

张婧 《兰台世界》2020,(4):149-151

鄯善乃西域古国之一,新疆出土的佉卢文书多涉及其国政治、经济、军事、文化和法律等诸多方面的问题,这批文书很好地反映了鄯善王的施政特点:鄯善王通过在全国建立严密的行政管理系统,使用严格细致的法律体系,再加上极力武装的胜兵体制、“专车”专用的交通制度以及事无巨细的统一管理使得鄯善逐渐富裕,成为西域城邦大国之一。  相似文献   

From objects to subjects: Repositioning teachers as policy actors doing policy work     

《Teaching and Teacher Education》2018

Within policy discourses, teachers are positioned as objects of reform who enact policies under rational systems of observation and accountability and are, therefore, situated as de-professionalized actors lacking expert knowledge. This research project asks relatively straight-forward questions: If practicing teachers were given a voice in political debates over urban education policy and reform, what would they say? What macro-level policy problems would they identify as being important? Findings indicate the primary policy problems include Systemic Inequity and Bad Policy. The primary policy solutions include, Schools as a Community Resource; Shared Decision-Making; Contextual Goals; and Time, Space and Resources.  相似文献   

Awkwardness of becoming a boundary object: Mangle and materialities of reports,documentation data,and the archaeological work     

Isto Huvila 《The Information Society》2016,32(4):280-297

Information about an archaeological investigation is documented in an archaeological report, which makes it the boundary object par excellence for archaeological information work across stakeholder communities such as field archaeologists, heritage managers, and land developers. The quality of reports has been a subject of debate, and recently it has been argued that more emphasis should be placed on making primary research data at least similarly available. This study explores the changing materialities and reciprocal formation of documents and their users with the advent of digitization, and how documents form and lose their status as boundary objects in these processes. The study posits that in order to be functional, a boundary object needs to provide a disclosure that makes it accessible to cognate communities. Further, it shows how assumptions about the functioning of the human and nonhuman (material artifacts) influence the ways in which archaeologists conceptualize the preservation and archiving of archaeological information and the role and potential of different types of digital and paper-based documents. This article is based on an interview study of Swedish archaeology professionals (N = 16) with theoretical underpinnings in the notions of boundary objects, mangle of practice, and disclosure.  相似文献   

网络安全浅析   总被引：4，自引：0，他引：4  

李淑芳  双娜  蒋年德 《科技广场》2006,(2):38-40

文中就网络安全问题介绍了其策略、技术、功能、服务等相关内容,并说明了路由选择技术、加密技术和防火墙技术对网络安全的影响,给出了各技术的分类、主要技术特征,同时使读者对各种技术的实施应用有所了解。  相似文献   

政策不确定性与企业粗放型创新:激励效应与选择效应     

甄丽明  罗党论 《科技管理研究》2019,39(14)

创新驱动政策下,地方政府为“创新”而竞争,企业创新呈粗放式模式,投入力度虽不断增强,但专利成果却量多质低。本文研究发现：(1)受新上任政府为“创新”而竞争的政策激励,政策不确定性对企业粗放型创新投入具有明显的促进作用。(2)政策不确定性对粗放式创新质量的影响存在着选择效应,面临政治冲击时,仅“功利性”的策略性创新企业专利申请数量短期内急剧增加,而以提升创新能力为目的的实质性创新专利数量并未显著增加。(3)在以专利数量等为政府资源分配的重要参考指标驱动下,政府补贴这一政策工具在政策不确定性与粗放型创新之间发挥了传导作用。本文结论意味着专利数据考核指标,政府补贴等“非市场”因素增强了企业粗放型创新行为,但并不利于创新质量的提高。  相似文献   

Leveraging Sunken Investments in Communications Infrastructure: A Policy Perspective From the United States     

Anthony G. Wilhelm 《The Information Society》2003,19(4):279-286

Bridging the digital divide between information and technology haves and have-nots has waned from the top of the national policy agenda in the United States during a time in which the sunken investments of the 1990s need to be leveraged. A national information network now exists yet this infrastructure--largely hardware--needs to be continually modernized and parlayed with commitments to building human capacity, developing relevant content, and scaling socially beneficial technology applications, such as telemedicine, in order to optimize these initial multi-billion-dollar outlays. This article makes the case that sidestepping public-private initiatives aimed at accelerating digital opportunity is imprudent, given the mounting empirical evidence highlighting the payoffs of information and communications technologies, when properly integrated and applied, especially in enhancing the life chances of underserved Americans. Policy next steps should advance the goals of expanding universal service initiatives, including hastening broadband deployment to homes and learning institutions, and deepening programs which leverage the utility of the existing infrastructure, such as expanding human-capital development, producing relevant content, and innovating socially beneficial technology applications.  相似文献   

The social strategy cone: Towards a framework for evaluating social media strategies     

《International Journal of Information Management》2016,36(1):1-8

Social media is growing rapidly. Providing both risks and opportunities for organizations as it does. The social strategy cone is developed for evaluating social media strategies. This framework comprises of seven key elements of social media strategies as based on a systematic literature review and case studies. The results of 21 interviews have contributed to the construction of the social media strategy cone for analyzing social media strategies. Three levels of maturity of social media strategy are proposed: initiation, diffusion and maturity. Initiation includes the key elements: ‘target audience’ and ‘channel choice’ while all case organizations studied payed attention to these elements. Diffusion includes the elements: ‘goals’, ‘resources’ and ‘policies’. Maturity adds the elements of ‘monitoring’ and ‘content activities’. Only 3 of the 9 organizations studied are in this phase of maturity. Although, theory suggests the importance of the element of ‘monitoring’ our research shows the need for more attention in practice.  相似文献   

电力系统的信息安全体系和策略   总被引：1，自引：0，他引：1  

周晓芬 《科技广场》2007,(5):113-115

本文论述了电力企业的信息安全问题。信息安全包括物理层面、网络层面、系统层面、应用层面和管理层面的安全,为了保障信息安全,必须搭建信息安全体系和制定相应的策略。  相似文献   

深圳科技创新政策体系的演进历程与效果分析     

周振江  何悦  刘毅 《科技管理研究》2020,40(3):27-31

深圳形成多层次、多维度的科技创新政策体系,成为深圳高新技术产业发展壮大的重要支撑。深圳科技政策体系的形成可分为4个时期,其演进历程具有政策工具从相对单一到不断丰富、政策覆盖领域不断扩大和精准、政策着力点切合产业发展导向等特征。探讨并分析其体系形成与政策效果有利于不断提升政策的综合效益,同时亦为其他地区提供经验借鉴。  相似文献