固定和浮放条件下文物展柜动力响应分析与试验研究

目前对文物保护的研究主要以试验为主,本研究试图用数值方法分析文物展柜的动力学特性,以解决试验分析方法所导致的缺陷。为此,对固定和浮放两种不同边界条件的文物展柜进行地震作用和简谐激励下的动力响应分析,给出了展柜展台面处的加速度动力放大系数(简称放大系数)上限值。以某博物馆展柜为原型,按1∶1/0.39进行缩尺振动试验,得出两种边界条件下展柜展台面处的放大系数。对试验展柜建立有限元模型,通过与试验对比,验证模型及分析方法的正确性。然后,建立展柜模型的有限元模型,对5种尺寸的展柜进行了动力响应分析,并考虑激励幅值、激励频率等对放大系数的影响。分析结果有助于指导文物的防震保护工作。     

Countering Violent Extremism in Indonesia: Bringing Back the Jihadists

While Indonesia’s efforts at countering violent extremism have enjoyed some successes, a section of its Islamist community remains committed to militant jihadism. The return from overseas of hundreds of militants linked to ISIS means that there is now a greater need than ever for interventions to prevent radicalisation – and for programs to reintegrate militants back into society. Drawing on 20 selected interviews with former jihadists, this article asks how successful official efforts have been at disengaging those convicted under Indonesia’s Anti-Terrorism Law from violent extremism. A significant minority remain welded to a militant mindset: “committed jihadists” who are likely to reoffend. Some former jihadists have “disengaged provisionally” but remain vulnerable: they have only disengaged for tactical or practical reasons. Yet some have also begun to disengage emotionally. While they may not disavow completely the use of force, these “provisionally deradicalised” activists have moved closer to that minority of interviewees who are “fully deradicalised”. Using this four-part typology of the pathways by which some militant jihadists have disengaged but others have not, this article finds that disengagement is a gradual process shaped by social networks. Consequently, it is suggested that a variety of methods be used to promote disengagement both before and after inmates leave prison.     

Finding Thoreau in French Canada: The Ideological Legacy of the American Revolution

Henry David Thoreau’s Yankee in Canada is easily overlooked. Because it is so selective in its depiction of life in the St. Lawrence River valley, historians of mid-nineteenth-century Canada have shown little interest in Thoreau’s first-hand account. To American readers, it offers little of the characteristic Thoreau found in Walden and Resistance to Civil Government. Yet, it is highly significant as an expression of national self-definition. Thoreau borrowed themes at least as old as the American Revolution when noting the pernicious rule of Catholic and British power in Canada. He set out to expose the promise of republican values by emphasizing the contrast between these and the poor and morally stunted life under Old World institutions. His work must therefore be interpreted as a call to his audience to commit more deeply than ever to the ideals that animated the Great Republic’s founding moment. It must also stand as a civic interpretation of American nationality at a time when this perspective was waning. Before long, Old World peoples would be racialized and the ideological embrace of the republican values advanced by Thoreau would no longer suffice in making American citizens.     

The Dor 2001/1 Byzantine Shipwreck,Israel: final report

Dor 2001/1 was a Byzantine coaster, about 16.9 m long, with an estimated displacement of 50 tonnes, dated to the first third of the 6th century CE, and loaded with building stones. It was excavated over five seasons, recorded under water, and a section of the shipwreck was retrieved and studied on land. The hull construction was based on frames without any type of planking edge‐fasteners. It is thus among the earliest frame‐based shipwrecks found so far in the Mediterranean. The origin of its construction tradition, with flat frames amidships, hard chine and straight sides, might have been related to a riverine tradition.     

Negotiating gender,power, and spaces in masquerade performances in Nigeria

Egungun is a Yoruba ancestral masquerade ritual that has been practiced for centuries. Shifting coalitions of individuals and factions have vied for social and political influence through this practice. In the nineteenth century, when western missionaries, explorers, and colonial officials first documented this phenomenon, any individual who could sponsor an Egungun performance was a force to be reckoned with in Yoruba society. To this day, Egungun masquerades are understood as vehicles through which individuals and groups can assert influence in their communities. Western scholars have portrayed Egungun as a hegemonic masculine performance space through which men assert their dominance over women. In privileging the writings of English missionaries, explorers, and colonial officials, we have tended to neglect the oral traditions and histories of specific Egungun masquerades in which women feature prominently. I argue that scholars have oversimplified and misrepresented the complex ways in which these performances are gendered as well as the ways in which they offer women opportunities to shape the identities of the places they inhabit.     

由士大夫的讲学活动看明代士风简

从明代士大夫的讲学和结社活动,特别容易看出明代有别于之前和之后朝代的独有的士大夫精神面貌。明代士风意气昂扬,讲学结社活动盛况空前、后无所及,是明代的一个突出特点,以此可以更好地展开关于明代、特别是明中叶以后士风的讨论。