农业科技期刊标注“作者贡献声明”的必要性探讨

对农业科技期刊中作者署名不规范现象进行总结的基础上,分析了造成署名不规范的原因,提出了农业科技期刊刊出“作者贡献声明”的可行性和必要性,认为“作者贡献声明”可以起到规范作者署名,减少文章刊出后引发的纠纷和撤稿的现象。     

Contributions of bird studies to biology

Birds are widely distributed, highly diversified, and exhibit behavior and social organizations equal in complexity to mammals, yet they are generally more conspicuous and approachable in natural environments. These attributes make birds excellent subjects in many areas of biological research. The topics in which studies on birds have figured prominently include the mechanisms of species formation, the regulation of the distribution and abundance of animals, the effects of the environment on behavior and physiology, the biological and evolutionary significance of variations in social organizations, the encoding of information in animal communication, the sensory basis for migration and navigation, the effects of hormones on nerve cells and behavior, the ontogeny of brain and behavior, and the structure and function of the vertebrate brain. The outstanding record of avian research suggests that birds will continue to provide important models for developing and testing new ideas in various fields of biology.     

Fault interactions and large complex earthquakes in the Los Angeles area

Faults in complex tectonic environments interact in various ways, including triggered rupture of one fault by another, that may increase seismic hazard in the surrounding region. We model static and dynamic fault interactions between the strike-slip and thrust fault systems in southern California. We find that rupture of the Sierra Madre-Cucamonga thrust fault system is unlikely to trigger rupture of the San Andreas or San Jacinto strike-slip faults. However, a large northern San Jacinto fault earthquake could trigger a cascading rupture of the Sierra Madre-Cucamonga system, potentially causing a moment magnitude 7.5 to 7.8 earthquake on the edge of the Los Angeles metropolitan region.     

Contributions of 1890 schools to rural development

This article concentrates on 1890 land-grant colleges' and universities' contributions to rural development in 16 southern and border states. The author contends that lifting rural dwellens out of ignorance and poverty has been a major objective of 1890 institutions. During the early years the 1890s sent out change-agents to encourage rural dwellers to improve their standard of living through education and self-help programs. These agents went into rural communities and taught farm families to raise better crops and livestock; improve their homes, schools, and community life; and despite inadequate funding of teaching, research, and extension at these schools, the 1890 schools made significant contributions to rural development. Moreover, the writer contends that the 1890 schools are not outmoded, but essential to rural development and to the education of American citizens during the rest of the 1990s and into the 21st century.     

Contributions of the visual ventral pathway to long-range apparent motion

Objects displaced intermittently across the visual field will nonetheless give an illusion of continuous motion [called apparent motion (AM)] under many common conditions. It is believed that form perception is of minor importance in determining AM, and that AM is mediated by motion-sensitive areas in the "where" pathway of the cortex. However, form and motion typically interact in specific ways when natural objects move through the environment. We used functional magnetic resonance imaging to measure cortical activation to long-range AM, compared to short-range AM and flicker, while we varied stability of structural differences between forms. Long-range AM activated the anterior-temporal lobe in the visual ventral pathway, and the response varied according to the form stability. The results suggest that long-range AM is associated with neural systems for form perception.