全文获取类型
收费全文 | 108篇 |
免费 | 7篇 |
出版年
2023年 | 3篇 |
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2018年 | 6篇 |
2017年 | 6篇 |
2016年 | 4篇 |
2015年 | 3篇 |
2014年 | 4篇 |
2013年 | 9篇 |
2012年 | 6篇 |
2011年 | 2篇 |
2010年 | 4篇 |
2009年 | 4篇 |
2008年 | 4篇 |
2007年 | 1篇 |
2006年 | 5篇 |
2004年 | 5篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 3篇 |
1999年 | 3篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 5篇 |
1992年 | 3篇 |
1991年 | 8篇 |
1989年 | 1篇 |
1987年 | 7篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 1篇 |
排序方式: 共有115条查询结果,搜索用时 15 毫秒
51.
Terr(it)or(ies) of Peace? The Congolese Mining Frontier and the Fight Against “Conflict Minerals” 下载免费PDF全文
This article traces the geography of the “conflict minerals” campaign and its impact on artisanal mining in the eastern Democratic Republic of the Congo, a region that currently emerges as a pioneer case of traceability and due diligence efforts with regard to the exploitation and trade in tantalum, tungsten and tin. We subsequently analyse the opening and attempted closure of the Congolese resource frontier in the context of recent market reform, and we describe how this process has accompanied a transnational corporate–government nexus bent on monopolising Congo's artisanal 3 T resources. Specifically, we argue how the conflict minerals campaign and its implementation “on the ground” has brought about a harmful, disruptive logic for an artisanal mining sector that is notoriously categorised as unruly, illegal, and informal, but of which upstream stakeholders have in practice been jeopardised by transnational reform. We thus shift the attention from questions on the political economy of “resource wars” towards a deeper understanding of the intersecting spaces of production and regulation that underpin formalisation and traceability of “conflict minerals” in this protracted conflict environment. 相似文献
52.
53.
54.
55.
56.
Eyyüp Ay Mustafa Kibaroğlu Christoph Berthold 《Archaeological and Anthropological Sciences》2014,6(2):125-131
The present paper reports the chemical and mineralogical composition of a black pigment material contained in a Syrian Bottle-shaped vessel excavated on an Early Bronze Age grave in Müslümantepe, a site located at the right bank of the Tigris River in Southeastern Anatolia. A combination of different analytical tools like state-of-the-art non-destructive μ-XRD2, μ-XRF and μ-Raman spectroscopy compared to classical powder XRD was used to characterize the content of the bottle. The results attest the presence of a manganese mineral (pyrolusite) most probably used for cosmetic purposes. This is the first evidence, which is scientifically tested, of the earliest use of cosmetics in the Upper Tigris of Southeastern Anatolia during the Early Bronze Age period, c. 2700–2550 bc. 相似文献
57.
Christoph Doppelhofer 《International Journal of Heritage Studies》2013,19(2):219-224
58.
59.
60.
古埃及墓葬彩绘材料研究 总被引:1,自引:0,他引:1
Christoph Herm 《文博》2009,(6):234-243
分析研究了八件古埃及墓葬出土器物,这些器物包括部分传统殡葬遗存,包括木乃伊裹尸、面具、木棺和礼仪器具等。时代大约为古埃及晚期(公元前800到公元400年),展现出不同的彩绘工艺和风格。本文将提供有关颜料、充填物、调合剂的分析结果。还将讨论古代工艺、时代、老化以及保护问题。另外,还对多种颜料分析手段进行了评估。 相似文献