Trees face the dilemma that achieving high plant productivity is accompanied by a risk of drought-induced hydraulic failure due to a trade-off in the trees' vascular system between hydraulic efficiency and safety. By investigating the xylem anatomy of branches and coarse roots, and measuring branch axial hydraulic conductivity and vulnerability to cavitation in 4-year-old field-grown aspen plan...

Recent work in Optimality Theory (Prince and Smolensky 1993, McCarthy and Prince 1993, to appear) has suggested that phonological regularities can be explained without reference to phonological rules, strictly in terms of constraints on representational wellformedness. A unique aspect of Optimality Theory (OT) is that candidates are evaluated in parallel: there is no serial derivation. Given th...

We present a novel device for generating suspension droplets and studying droplet impact against solid substrates. The proposed generator extends beyond previous designs by introducing hydraulic machinery that includes separate test containers. This eliminates mixing between the liquid above latch connects two containers, thus ensuring reliable clogless operation. can produce of controllable si...

Hydraulic fracturing is an important method of reservoir stimulation in the exploitation of geothermal resources, and conventional and unconventional oil and gas resources. In this article, hydraulic fracturing experiments with shale, sandstone cores (from southern Sichuan Basin), and granite cores (from Inner Mongolia) were conducted to investigate the different hydraulic fracture extension pa...

3D printing technologies are widely used in world agriculture, but being implemented Ukraine. The use of reverse engineering technology allows to create new products on a ready-made model, as well as, if necessary, make the necessary design changes existing facilities. Therefore, this approach is relevant and opens wide opportunities for modeling agriculture. implementation technological writin...

Hydraulic activity refers to a property most familiar when discussing hydraulic cement such as ordinary portland cement (OPC). ASTM C125-15a defines hydraulic cement as “a cement that sets and hardens by chemical reaction with water and is capable of doing so under water.” That is, hydraulic cements, including SCMs that have hydraulic properties, react with water to harden, and that hardening p...

Direct-on-line synchronous motors are a good alternative to induction in fluid machinery drives due their greater energy efficiency but have the significant disadvantage of limiting maximum moment inertia loading mechanism ensure successful and reliable start-up. This is critical centrifugal fans with massive steel impeller. In this article, using mathematical model, dynamics starting synchroni...

The Hydraulic excavator machines are heavy duty earth mover consisting of a boom, arm and bucket. It works on principle of hydraulic fluid with hydraulic cylinder and hydraulic motors. The Hydraulic excavator backhoe operation require coordinated movement of boom, arm and bucket to control the bucket tip position by following a desired trajectory and to use the excavator machines effectively in...

abstract many studies have been conducted on the characteristics of hydraulic jump over gradually expanding cross sections, but comparatively few have been carried out on basins with convergent wall. in the present research, the hydraulic jump characteristic of the stilling basin with convergent wall has been investigated. the main objective of this research is evaluation of conjugate depths ra...

The Swedish 2008 Government’s Action Plan on eGovernment offers old wine (focussed on technology rather than on services; production-centred rather than needs-based) in old bottles (closed political systems rather than open infrastructure; no measurements and, consequently, no incentives for government agencies to change). This paper analyzes the Plan based on an Enterprise Architecture integra...