Increasing nitrogen absorption efficiency reduces use of excessive application of N. The effect of rootzone temperature on nitrogen absorption needs clarification. The experiment was conducted to investigate low (15°C, RTZ1), high (35°C, RTZ2) and optimum (25°C, RTZ3) root zone temperatures and nitrogen 52.5 (ND1), 78.75 (ND2) and 105 (ND0) mg∙L-1 levels on cucumber (Cucumis sativus L.), cv. Su...

A small salt gradient solar pond with an average surface area of 1.8 m2 and depth of 0.8m has been tested. The depths of storage, gradient and surface zones are 0.3, 0.27 and 0.07m, respectively. The temperature of the storage zone for the summer days reaches its maximum of 65˚ C after about 8 days. Daily variation of the storage zone temperature was about 8˚C which is due to small volume of th...

Isobaric and cooling zone of iron ore reactor have been simulated. In this paper, heat and mass transfer equation are formulated to perform the temperature and concentration of gas and solid phase respectively. Temperature profile for isobaric zone is simulated on the range temperature of 873-1163K while cooling zone is simulated on the range temperature of 733-1139K. The simulation results hav...

This paper presents a study the effect of nose radius (Rz-mm) on cutting force components and temperatures during the machining simulation in an orthogonal cutting process for titanium alloy (Ti-6Al-4V). The cutting process was performed at various nose radiuses (Rz-mm) while the depth of cut (d-mm), feed rate (fmm/tooth) and cutting speed (vc-m/ min) were remained constant. The main cutting fo...

The use of the temperature criterion in design metal-cutting machines, determined on basis models that take into account contact thermal resistances, is an objective necessity. These should to maximum extent actual conditions parts under consideration, by deviations mating surfaces from ideal shape. article presents results numerical modeling based finite element method formation resistance and...

Boundary encroachment or cutting right up to pre-cut sections are examples of unsteadystate operations of the laser cutting process. Cornering and generating small diameter holes also fall into this category. Heat transferis often frustrated here, resulting in bulk heating of the workpiece. This in tum leads to a degradation of the cut quality.' Currently, trial-and-error based experimentation ...

Trends in meteorological and ecological variables were calculated across the state of Wisconsin from 1950 to 2006 to quantify recent patterns of climate change. In summary, annual average nighttime low temperatures have increased by 0.6 to 2.2o C, whereas the annual average daytime high temperatures have warmed by 0.3 to 0.6o C. Annual average precipitation has increased by 50–100 mm in the cen...

The paper presents results of an analysis of acoustic emission (AE) measurement in laser cutting of a DC04 steel plate. Laser cutting was evaluated on the basis of monitoring the acoustic emission in the course of cutting and of an analysis of events occurring in the material after the completion of laser cutting. It was found that the cutting oxygen flow was the primary source of AE in laser c...

The rotary cutting method of materials has a number advantages over the existing traditional methods, e.g. temperature decrease in zone, also noncumulative blade wear. Due to its high durability, tool allows processing hardened and difficult-to-machine materials, high-temperature alloys, as well composite laminated materials. However, this machining is usually not applied for various shaped sur...