Introduction. Arracacha (Arracacia xanthorrhiza Bancroft) a promising crop due to its nutritional and gastronomic relevance. Population density is an agronomic practice that increases water radiation use efficiencies, maximizes the yield, profitability. However, selection of optimal population based on physiological, agronomic, economic criteria for arracacha has not been studied. Objective. To...

Developing applications that support evolution in a seamless way is not an easy task; in an early design stage, some concepts may be confused or some potential functionality not foreseen, resulting in bad separations of concerns. In this kind of designs, future changes may imply huge modifications if a highquality object-oriented model is the desired product. In theory, object oriented programm...

This study was designed to define the characteristics of eye-hand coordination in a task requiring the interception of a moving target. It also assessed the extent to which the motion of the target was predicted and the strategies subjects used to determine when to initiate target interception. Target trajectories were constructed from sums of sines in the horizontal and vertical dimensions. Su...

This study aimed to evaluate levels of potassium and nitrogen fertilizer inversion in the black oat crop on corn yields. The experimental design was a randomized block with subdivided plots three repetitions. treatments were four fertilization strategies, two managements (forage cover crop). strategies involved winter (oats) summer (corn) application, respectively, following combinations (200-0...

A precise prediction of the yield losses inflicted by weeds is the basis of decisions in weed management. Hitherto, only rough estimates, which neglect the specific production situation, have been available for vegetable crops. In this study a simple simulation model was developed to estimate yield loss by radiation competition as a function of environmental variables. In the model, the distrib...

PURPOSE Medication errors remain a threat to patient safety. Therefore, the purpose of this study was to determine the relationships among characteristics of the nursing practice environment, nurse staffing levels, nurses' error interception practices, and rates of nonintercepted medication errors in acute care hospitals. DESIGN This study, using a nonexperimental design, was conducted in a s...

Tropical forests are an important part of global water and energy cycles, but the mechanisms that drive seasonality their land-atmosphere exchanges have proven challenging to capture in models. Here, we (1) report fluxes latent heat (LE), sensible (H), outgoing short longwave radiation at four diverse tropical forest sites across Amazonia—along equator from Caxiuanã Tapajós National Forests eas...