A prospective cohort study was performed to evaluate the prevalences and loads of Salmonella and Campylobacter spp. in farm and processing plant samples collected from 55 commercial broiler chicken flocks. Environmental samples were collected from broiler houses within 48 h before slaughter, and carcass rinses were performed on birds from the same flocks at 4 different stages of processing. Sal...

When a distribution network consisting of Distributed Generations (DGs) is disconnected from upstream network, the system may be exposed to severe power imbalance. In order to prevent the damage of power plants, frequency relays operate and remove DGs from the network. In contrast to traditional methods, the main objective in new methods is to keep DG units in service in the islanded distributi...

Background. Referees are an integral part of every handball match which is considered a high-intensity activity and they need to follow the action as close as possible to avoid mistakes in their decisions. Objectives. This research aimed to determine the physiological loads of referees during handball matches and whether a higher physiological load during the match has a significant effect on ...

Abstract. Long-span suspended bridges rely upon networks of tensed cables that carry the weight deck. The are generally connected to a number vertical towers (pylons) transfer forces foundations as in case cable-stayed bridge. Their structural behaviour is highly influenced by pretension on account redundancy structure. Several methods have been proposed for determining cables, such Load-Balanc...

in order to investigate the structural behaviour of persian brick masonry domes, three types of semi-circular, (drop, ordinary and raised) four-centred and (drop, ordinary and raised) pointed domes have been studied. the three-dimensional non-linear finite element method using the ansys code has been used for analysis. domes with different thicknesses and spans have been subjected to monotonic ...

in many structures, the applied lateral loads are comparable with gravity loads. these types of piles which are subject to high lateral load are usually divided into two categories including long and short piles. the general methods to estimate lateral bearing capacity of short and long piles are based on ultimate bearing capacity and allowable horizontal displacement respectively. in the prese...

this paper presents a novel control method to improve the efficiency of low-voltage dc-dc converters at light loads. pulse width modulation (pwm) converters have poor efficiencies at light loads, while pulse frequency modulation (pfm) control is more efficient for the same cases. switching losses constitute a major portion of the total power loss at light loads. to decrease the switching losses...

the aim of this research was to study the wear behavior of 42crmo4 steel/zro2 composite with 10 and 30 ppi performed ceramic and compare it with the un-reinforced steel under different applied loads. the composite specimens were obtained by pressureless infiltration of the melt into a preformed ceramic of zirconium oxide. the effect of applied load on the specimens wear behavior was studied by ...

in this paper a discrete big bang-big crunch algorithm is applied to optimal design of reinforced concrete planar frames under the gravity and lateral loads. optimization is based on aci 318-08 code. columns are assumed to resist axial loads and bending moments, while beams resist only bending moments. second-order effects are also considered for the compression members, and columns are checked...

Water resources managers always are searching for cost-effective monitoring programs that provide maximum information for minimum cost. Monitoring of sediment discharges from streams and rivers is one of the expensive efforts that is always reduced or cut when financial resources are limited. This has resulted in a very limited number of long-term sediment monitoring sites in the United States....