Summer food habits of coyotes in central Wyoming

Summer food habits of coyotes ( Canis latrans ) were investigated on a 3100-km 2 area in central Wyoming, divided into one deer-use area and five non-deer areas. Analysis of 404 scats (fecal samples) revealed an overall average of 63 percent occurrence of native ungulates, 63 percent leporids, 46 percent rodents, 14 percent livestock, and 11 percent birds. Pronghorn ( Antilocapra Americana ) was the ungulate most frequently consumed, occurring in about 87 percent of the scats. Mule deer ( Odocoileus hemionus ) occurred in only 8 percent, and in 5 percent the native ungulate remains were not identifiable beyond order. This large percentage of big game in the diet is apparently unusual, because big game has been of minor importance in most coyote food-habit studies. The high incidence of leporids is consistent with other studies performed in arid intermountain areas. Although cricetines, especially deer mice ( Peromyscus maniculatus ), were trapped consistently in all habitats, months, and trapping areas, they were found in scats at a lower frequency than microtines and sciurids. This suggests a coyote hunting strategy that selected for the latter two groups.     

Aspects of Quantum Non-Locality II: Superluminal Causation and Relativity

In a preceding paper, I studied the significance of Jarrett's and Shimony's analyses of ‘factorisability’ into ‘parameter independence’ and ‘outcome independence’ for clarifying the nature of non-locality in quantum phenomena. I focused on four types of non-locality; superluminal signalling, action-at-a-distance, non-separability and holism. In this paper, I consider a fifth type of non-locality: superluminal causation according to ‘logically weak’ concepts of causation, where causal dependence requires neither action nor signalling. I conclude by considering the compatibility of non-factorisable theories with relativity theory. In this connection, I pay special attention to the difficulties that superluminal causation raises in relativistic spacetime. My main findings in this paper are: first, parameter-dependent and outcome-dependent theories both involve superluminal causal connections between outcomes and between settings and outcomes. Second, while relativistic deterministic parameter-dependent theories seem impossible on pain of causal paradoxes, relativistic indeterministic parameter-dependent theories are not subjected to the same challenge. Third, current relativistic non-factorisable theories seem to have some rather unattractive characteristics.     

ATM网络中输出过程的自相似特性

建立一个有限缓冲区的单服务器模型，证明了在队长有有限二阶矩的条件下，输出过程具强渐近二阶自相似性质与输出过程具强渐近二阶自相似性质等价。     

高分子物理概论

高分子概念的形成和高分子科学的出现始于20世纪20年代。当时有些有机化学家开展了缩聚反应及其自由基聚合反应的研究，并通过这些反应相继开发出尼龙（聚酰胺）66、氯丁橡胶、丁苯橡胶和聚甲基丙烯酸甲酯等一大批高分子材料，从而形成了“高分子化学”的研究领域。随着这些合成高分子的出现，解决这些高分子的性能和表征：以及了解其结构对性能的影响等问题也随之变得很必要了。因此从20世纪40年代至50年代，一批化学家、物理学家投入这方面的研究，渐渐形成了“高分子物理”这门新兴的学科。