introduction: the aim of this study was to evaluate the effect of bridge orientation in casting machine on castability and quality of base metal castings. methods: three groups of patterns with different direction and lengths in casting machine were casted and then studied qualitatively and quantitatively using mean and standard deviation in table of frequency. results: larger nodules and poros...

Questions: Can vertically transmitted parasites (VTPs) serve as indirect mutualists by excluding more virulent, horizontally transmitted parasites (HTPs)? How does the efficiency of vertical transmission affect: (1) the equilibrium number of hosts infected by each type of parasite; (2) the total number of hosts in the population; and (3) virulence of the horizontally transmitted parasite? How d...

Through the efforts of the human genome project, genes horizontally and laterally gene transferred have been implicated as the source of bacterial protein homologs in the human genome. Additionally, similar protein homologs have been identified in archeal and bacterial species. Controversy continually surrounds the estimations of numbers of horizontally transferred genes, the time and distance ...

The application of ultra-high spatial resolution imagery from small unpiloted aerial systems (sUAS) can provide valuable information about the status built infrastructure following natural disasters. This study employs three methods for improving value sUAS imagery: (1) repeating positioning image stations over time using a bi-temporal imaging approach called repeat station (RSI) (compared here...

A variety of large-scale machine learning problems can be cast as instances of constrained submodular maximization. Existing approaches for distributed submodular maximization have a critical drawback: The capacity – number of instances that can fit in memory – must grow with the data set size. In practice, while one can provision many machines, the capacity of each machine is limited by physic...

Bridges built from any material and having any special shape  will eventually show signs of wearing off; therefore, there are several factors in the kind and rate of such wearing off and its expansion such as atmosphere, flood, earthquake, overload, design quality, execution and kind of materials that will all reduce the functionality of the structures. Thus, maintaining processes and repairing...

In this study, the performance of triangular added damping and stiffness (TADAS) dampers combined with curved dampers (Curved-TADAS damper) is evaluated in moment resisting steel frame (MRSF). These dampers are passive and install in the beam-column connection region. Variable parameters of this study involve the width of curved damper (50, 75 and 100 mm), the thickness of TADAS damper (5 and 1...