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161.
Melissa D. Suarez M.S. Randal J. Southard Ph.D. Sanjai J. Parikh Ph.D. 《Journal of forensic sciences》2015,60(4):894-905
Soil samples have potential to be useful in forensic investigations, but their utility may be limited due to the inherent variability of soil properties, the wide array of analytical methods, and complexity of data analysis. This study examined the differentiation of similar soils based on both gross (texture, color, mineralogy) and explicit soil properties (elemental composition, cation exchange, Fe‐oxyhydroxides). Soils were collected from Fallbrook and adjacent map units from Riverside and San Diego Counties in California. Samples were characterized using multiple techniques, including chemical extracts, X‐ray diffraction (XRD), and Fourier transform infrared spectroscopy. Results were analyzed using multiple analytical approaches to compare counties and land uses. Some analyses (XRD, extractions) were better at distinguishing among samples than others (color, texture). Ratios of rare earth elements were particularly useful for distinguishing samples between counties. This potential to “fingerprint” soils illustrates the usefulness of a comprehensive soil database for criminal investigators. 相似文献
162.
Identification of Natural Images and Computer‐Generated Graphics Based on Statistical and Textural Features 下载免费PDF全文
To discriminate the acquisition pipelines of digital images, a novel scheme for the identification of natural images and computer‐generated graphics is proposed based on statistical and textural features. First, the differences between them are investigated from the view of statistics and texture, and 31 dimensions of feature are acquired for identification. Then, LIBSVM is used for the classification. Finally, the experimental results are presented. The results show that it can achieve an identification accuracy of 97.89% for computer‐generated graphics, and an identification accuracy of 97.75% for natural images. The analyses also demonstrate the proposed method has excellent performance, compared with some existing methods based only on statistical features or other features. The method has a great potential to be implemented for the identification of natural images and computer‐generated graphics. 相似文献
163.
Gabriel J. Michael 《政策研究评论》2015,32(2):175-199
Leaked information, such as WikiLeaks’ Cablegate, constitutes a unique and valuable data source for researchers interested in a wide variety of policy‐oriented topics. Yet political scientists have avoided using leaked information in their research. This article argues that we can and should use leaked information as a data source in scholarly research. First, the methodological, ethical, and legal challenges related to the use of leaked information in research have been considered, concluding that none of these present serious obstacles. Second, how political scientists can use leaked information to generate novel and unique insights concerning political phenomena using a variety of quantitative and qualitative methods have been shown. Specifically, how leaked documents reveal important details concerning the Trans‐Pacific Partnership negotiations, and how leaked diplomatic cables highlight a significant disparity between the U.S. government's public attitude toward traditional knowledge and its private behavior have been demonstrated. 相似文献
164.
RICHARD JONES 《Bulletin of Latin American research》2015,34(3):305-323
A new migration pessimism argues that the economic benefits of international labour migration for migrant households may not justify the social costs. This article provides a test of this argument based on the author's survey of 304 households in Jerez municipio (municipality), Zacatecas, Mexico, in 2009. The results indicate that active households (those with at least one migrant abroad) perceived their economic situation to have improved more, but both their social cohesion and their happiness to be less than those of non‐active households. Social cohesion (family unity and maintenance of values) is shown to be pivotal in the happiness differential enjoyed by the non‐active households. 相似文献
165.
166.
BENEDETTA CALANDRA 《Bulletin of Latin American research》2013,32(3):311-324
This article focuses on two groups of Southern Cone exiles' communities, Chileans and Argentineans, choosing to settle down in an atypical destination: the United States. After estimating some qualitative and quantitative findings, the article delves into the ways these communities settle down, remember their relationship with politics, maintain their connection with exiled fellow‐countrymen worldwide and perceive their national identity. By relying on an empirical, single‐case perspective, with no theoretical ambitions to extrapolate its conclusions to other contexts, this article examines the extent to which the conceptualisation of the exile and diaspora categories changes when applied to these two communities. 相似文献
167.
GEORGE PHILIP 《Bulletin of Latin American research》2013,32(3):279-293
Velasco's brand of military nationalism marked a real break from the orientation of the majority of Peruvian military regimes, which were pro‐United States and espoused limited government. Many attempts have been made to explain this outcome, but the release of documents from British and United States archives clarify certain issues. Above all, Velasco's use of the nationalist card enabled him to win over decisive support from both the military and political society. This support gave him sufficient leverage to consolidate his personal position, which he did before launching a major programme of domestic property expropriation. 相似文献
168.
CHRISTOPHER GAFFNEY 《Bulletin of Latin American research》2019,38(3):267-283
The Rio de Janeiro Olympic Games were the last major sporting event in a decade‐long cycle in the Brazilian metropolis. In the years leading up to the Rio 2016 Summer Olympic Games, the city's urban planning agenda was captured by the exogenous demands of hosting the quadrennial spectacular. This capture has exacerbated four tendencies that will pertain in Rio de Janeiro for the foreseeable future: consolidation of consumer sovereignty, restructuring of urban circulations, financialisation of urban territories, and securitisation of exception. 相似文献
169.
目的 优选复方白芍颗粒的最佳提取工艺。方法 以干膏得率和白芍活性成分芍药苷的提取率为评价指标,采用正交设计法考察溶剂用量、提取时间以及提取次数对提取结果的影响,确定最佳提取工艺。结果 最佳提取工艺参数为:加10倍量水,提取2次,每次提取1 h。结论 优选的提取工艺切实可行,为复方白芍颗粒制剂的研究奠定基础。 相似文献
170.
CHRISTOPHER WYLDE 《Bulletin of Latin American research》2011,30(4):436-452
The national Peronist social contract in Argentina has a long history rooted in syndicalism and populism. However, Menemismo in the 1990s, El Argentinazo in December 2001, and Kirchnerismo post crisis have all served to change the fundamental framework of the Argentine economy, the social underpinnings of that economy and how it intersects with global capital. This article is an attempt to identify the nature of Kirchner's administration through analysis of political economy, therefore seeking to facilitate a deeper understanding of the developmental nature and impact of the Kirchner administration of 2003–2007. 相似文献