A statistical methodology for the comparison of blue gel pen inks analyzed by laser desorption/ionization mass spectrometry

A statistical methodology for the objective comparison of LDI-MS mass spectra of blue gel pen inks was evaluated. Thirty-three blue gel pen inks previously studied by RAMAN were analyzed directly on the paper using both positive and negative mode. The obtained mass spectra were first compared using relative areas of selected peaks using the Pearson correlation coefficient and the Euclidean distance. Intra-variability among results from one ink and inter-variability between results from different inks were compared in order to choose a differentiation threshold minimizing the rate of false negative (i.e. avoiding false differentiation of the inks). This yielded a discriminating power of up to 77% for analysis made in the negative mode. The whole mass spectra were then compared using the same methodology, allowing for a better DP in the negative mode of 92% using the Pearson correlation on standardized data. The positive mode results generally yielded a lower differential power (DP) than the negative mode due to a higher intra-variability compared to the inter-variability in the mass spectra of the ink samples.     

土地的集体所有制与农村安全

土地集体所有制具有重要的社会功能,它为农户尤其是弱势农户提供了规避市场风险的手段,从而保持了中国农村的稳定和安全。然而,由于物权化的承包关系、政治权力对土地权利的干预以及基层组织自身的不作为,土地集体所有制的优势正在丧失。在这种条件下,土地制度必须从中国现代化实现的战略高度进行重新统筹和安排,避免制度本身的单一与僵硬,以给不同地区农户的土地承包留下一定的自主选择权和决定权。     

关于湘西民族地区农村纠纷的调查与思考

湘西地区是各民族融合居住的地区。这里农村矛盾纠纷呈现出复杂化、多元化趋势。其成因是多方面的,包括历史原因、现实原因、观念原因、利益原因等。和谐解决湘西民族地区农村纠纷,需要我们重视本土资源,推进国家法与民间习俗形成良性互动,促进纠纷的传统解决模式与现代解决方式的有机结合,构建多元化的农村纠纷解决机制。     

新时期的农村社会治安态势及防范研究

新的历史时期,农村治安呈现出新的发展态势,农民的生命财产安全和农村公共安全问题日益增多。违法犯罪手段更新换代、类型多样化,多重矛盾引发的群体性事件频发,特殊群体违法犯罪升级与恶化。自然、人文、社会等诸多因素激发了并助燃着农村固有的及潜在的矛盾与冲突。从战略高度转变思想理念,加快农村经济发展和精神文明建设,构建多方参与的农村社会治安防控体系,是维护农村社会长治久安的长效性保障机制。     

中西部地区农村女性人口流动:现状、问题与对策

中西部地区农村女性人口流动的动因除了一般意义上的主客观因素外,还有自身的特殊动因:经济发展和工业化、城市化水准的相对落后为中西部地区农村女性人口流动提供了充足的流动资源储备;政策反哺和区域产业转移对中西部经济社会发展效应的逐步显现,成为促进中西部地区农村女性人口流动的重要因素.目前,经济发展水平和对外开放程度、农村流动女性的自身素质、传统观念的影响、城乡差别的存在、社会就业渠道的狭窄等,共同制约、影响着中西部地区农村女性人口的流动.其突出问题表现为结构性问题、政策性问题、制度性问题、观念性问题和发展性问题.因此,我们要针对以上问题采取一定的措施.     

Unix系统计算机取证中数据恢复方法探讨

计算机犯罪和网络入侵事件给司法取证提出了新的要求,恢复计算机中被删除的信息成为获取证据和犯罪线索的一种重要手段。文章介绍了Unix系统中文件的存储及删除原理,着重探讨了利用系统命令、Debugfs工具、RAW文件等方式恢复数据取得证据的方法。     

农村社会精细化管理探索与思考——以松桃苗族自治县沙坝河乡为例

行政管理粗放、效率不高是政府工作存在的主要问题,也是政府公信力不强、服务质量不高的主要症结。实施精细化管理是社会管理创新和建设服务型政府的重要内容和有效途径,是深化行政体制改革、提高政府执行力和行政效率的必然选择。为进一步创新管理模式,提高政府的行政工作水平,沙坝河乡探索推行农村社会精细化管理,为基层政府社会管理创新提供了一个范例。     

深圳都市农业发展的思路、模式与保障

"十五"期间深圳都市农业发展状况良好。"十一五"期间,深圳应发展园区型都市农业模式。都市农业要具备农产品安全保障、农业高新技术示范、外向型、观光休闲教育、城市生态屏障五大功能。应采取加强立法、增加投入、保护农业环境和资源、大力扶持培育发展农业"龙头"企业、加快农业对外开放等措施,保障深圳都市农业的发展。     

England's green and pleasant land? examining racist prejudice in a rural context

Popular constructions of rural England have perpetuated images of idyllic, problem-free environments that have largely masked the process of ‘othering’ that works to marginalize particular groups within rural society. Drawing on the findings of studies conducted in two rural English counties, Chakraborti and Garland assert that racist prejudice is very much part of the reality of rural living for minority ethnic groups whose presence in the countryside tends to be overlooked. They discuss the perceptions of established white rural communities and those of the victims of racial harassment to illustrate the disturbing nature, extent and impact of racism in rural areas, and suggest that the enduring ‘invisibility’ of the problem is compounded both by the under-reporting of such racist incidents and the reluctance of agencies to acknowledge the needs of minority ethnic groups in the countryside. Consequently, racist prejudice in the rural context will only be recognized as a significant issue through a greater appreciation of the diverse complexity of rural space, and the abandonment of singular, outdated notions of rurality.