Spinel-structured NiMn2O4 ceramics, with different valence Ni sources, were originally prepared using Ni2O3 and NiO as raw materials, the effects of sources on their electrical properties first investigated. XRD patterns show that both Ni2O3-based NiO-based ceramics are single cubic spinel structures. SEM/EDS images indicate exhibited high density at experiment-determined sintering temperatures...

El objetivo de este estudio fue identificar híbridos maíz (Zea mays L.) cruza simple alto rendimiento en suelos Valles Altos con y bajo contenido nitrógeno. En 1999, el Batán, México, se evaluaron 19 cruzas Ai x CML349 CML246, 33 Bj CML244 CML352, donde corresponden a líneas endogámicas derivadas las poblaciones 902 903, respectivamente, del Centro Internacional Mejoramiento Maíz Trigo (CIMMYT)...

Three phenomena—the disparity between the assumed and observed attributes of economic man, the link between nature and artifacts, and the use of computers as a source of knowledge––fascinated Herbert A. Simon. He built a new paradigm for each field—bounded rationality to deal with the disparity, the science of the artificial as its link to nature, and artificial intelligence for creation of kno...

This paper theoretically studies the consequences of heterogeneity on self-governance, cooperation, and trust in large communities. I consider a game model where players belong to a large population and are randomly matched. Players interact with each other infrequently and, when matched, play a prisoners’ dilemma. There exists an institution that can convey information on play histories. Playe...

Interspecific chromosome substitution is among the most powerful means of introgression and steps toward quantitative trait locus (QTL) identification. By reducing the genetic "noise" from other chromosomes, it greatly empowers the detection of genetic effects by specific chromosomes on quantitative traits. Here, we report on such results for 14 cotton lines (CS-B) with specific chromosomes or ...

Some analysts have criticized Friedrich Hayek’s theory of cultural evolution for implying that the rules, customs, norms, and institutions that emerge from the evolutionary process are necessarily efficient or desirable in all cases. This charge is unfounded. The present article defends Hayek versus his critics in two ways: First, it restates Hayek’s own objections to the idea that cultural evo...

Since its original conception by Bowlby to explain an important evolutionary function of the child– caregiver relationship, attachment theory has been supported by much empirical research in a variety of settings. However, although attachment theory began as a clinical enterprise, its wider application to the everyday clinical understanding of adult mental health problems has lagged behind the ...

BACKGROUND Perioperative bronchospasm refractory to β agonists continues to challenge anesthesiologists and intensivists. The TMEM16A calcium-activated chloride channel modulates airway smooth muscle (ASM) contraction. The authors hypothesized that TMEM16A antagonists would relax ASM contraction by modulating membrane potential and calcium flux. METHODS Human ASM, guinea pig tracheal rings, o...