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In this paper, we apply the concepts of demographic and social differentiation to the analysis of inequality among rural households in the northern Peruvian department of Cajamarca. While we demonstrate that social rather than demographic differentiation is the more important process in this area, we illustrate the complementarity of Chayanov's methodological analysis of the family life cycle with a Marxist class‐theoretic framework. Both enrich the study of patterns in the agricultural sector of household labor use, family structure and composition, and income inequality. 相似文献
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After the train bombing in Madrid (Spain) on 11 March 2004, methenamine was detected in some of the specimens of Goma-2 ECO dynamite submitted to the forensic laboratories when analyzed by gas chromatography coupled with mass spectrometry detection (GC-MS). Methenamine is synthesized from formaldehyde and ammonia through a condensation reaction. However, neither methenamine nor any of these compounds were used to manufacture Goma-2 ECO dynamite. Four different experiments were designed in order to explain the presence of methenamine detected in the dynamite samples analyzed. In the first one, GC-MS was used to analyze the individual components of Goma-2 ECO provided by the manufacturer and the components mixed in a raw paste. Methenamine was detected in the manufacturer's ammonium nitrate and in the raw paste. The other experiments were designed to find the precursors sources for methenamine generation in Goma-2 ECO. Results revealed that these sources could be ammonium nitrate for ammonia and sawdust for formaldehyde. Under heating conditions, dynamite could produce these precursors, which could condense in the injection port of the GC-MS system and generate methenamine. However, methenamine was not always detected in these dynamites. This was explained by the existence of two opposite effects: (a) dynamite stability makes difficult that ammonium nitrate releases ammonia and (b) there is a gradual loss of formaldehyde in sawdust along the time. Both effects can prevent the formation of an amount of methenamine large enough to be detected. 相似文献
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Martín AF Vergeles MR Acevedo Vde L Sánchez Adel C Visa SL 《Journal of interpersonal violence》2005,20(7):872-891
This study aimed to know the prevalence of sexual coercion toward women perpetrated by acquaintance Spanish college men, and some personal factors associated with the involvement in these behaviors to replicate the confluence model. An anonymous questionnaire was completed by 196 university students that included an adaptation of the Sexual Experiences Survey, and other scales to assess different attitudes, motives, and experiences associated with sexual aggression. About 15% of men admitted some involvement in sexual behaviors when the woman did not want it. The control and dominance needs, the personal disposition to impersonal sex, and empathy competency showed the strongest association with the involvement in coercive sexual behaviors. Empathy moderated the effects of control and domination needs and the impersonal sex in predicting sexual coercion. Overall, our data supports the confluence model. 相似文献
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This paper evaluates the use of climate-based information in drought mitigation in Ceará, Northeast Brazil. It examines two policies – a seed-distribution program (Hora de Plantar) and the Emergency Drought-Relief Program – that use climate information produced by FUNCEME (Cearás Foundation for Meteorological and Hydrological Resources) to implement drought planning. It argues that, in politically charged policy-making environments, the use of climate forecast information may go beyond its problem-solving function to influence broader issues of accountability and democratization. In Cearás politically charged environment, technocrats rely on scientific information about climate to insulate policy-making from both political meddling and public accountability. However, insulation afforded by the use of climate information has played different roles in the policy areas examined in this study. While in drought emergency-relief planning the use of climate information critically contributed to the democratization of policy implementation, in agricultural planning, it worked towards further insulating decision-making from public accountability and client participation. Thus, the use of climate information is context-dependent, that is, the distribution of costs and benefits associated with information use in policymaking depends on the social, political, and cultural context in which information producers and users work. Moreover, climate information can be used in ways – positive or negative – significantly different from the use that information producers intended. 相似文献
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Eighteen laboratories interested in the analysis of human hair for drugs of abuse participated in a proficiency test (PT) organized by the Society of Hair Testing (SoHT) in 2001.Samples sent to the participants included one drug-free hair sample and two samples from drug users, sent in the form of short segments previously checked for homogeneity by three reference laboratories. Participants were requested to analyze the samples following the standard procedure used routinely in their laboratories.The compounds present in the samples included opiates, cocaine and metabolite, cannabinoids and amphetamines. All the laboratories analyzed opiates, cocaine and benzoylecgonine (BE); only 10 analyzed amphetamines, and 9 cannabinoids. Various methods were used to extract drugs from the hair-enzyme treatment, acidic, basic and methanol extractions. All the laboratories employed GC-MS, with the exception of two which used GC-MS/MS and LC-MS/MS, respectively. Six laboratories performed initial screening tests by RIA, ELISA or EMIT.Results show that the laboratories performed well qualitatively, since they successfully identified all the analytes that they tested, with the exception of eight false results. However, the scatter of quantitative results was high. 相似文献
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Intergovernmental relations is playing a key role in the emergenceof federal arrangements in post-Franco Spain. The transitionto democracy included the building of a state made up of autonomouscommunities, which is transforming the regime into one withmany centers of power, in both the historic regions and therest of the country. Intergovernmental institutional, political,and fiscal patterns demonstrate the evolving nature of self-ruleand shared rule, moving Spain closer into the orbit of otherfederal systems. 相似文献
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Adelaide Maria Souza Antunes Carmen Maria Gadea de Souza Cláudia Ine^s Chamas Eduardo Falabella Sousa-Aguiar Luis Eduardo Duque Dutra 《The Journal of Technology Transfer》2000,25(1):37-42
The creation of the Fabrica Carioca de Catalisadores (FCCSA) is presented in this article. After some brief background information on the reasons for its implementation, the methods used to choose the partner are discussed, as well as the technology transfer, with particular emphasis on R&D transfer. Finally, the plant's current stage of development is studied and its main characteristics are presented, as an example of a successful joint venture between culturally different and geographically distant countries. 相似文献