in this paper a new method based on strut-and-tie model (stm) is proposed to determine the shear capacity of simply supported rc deep beams and an efficiency factor for concrete with considering the effect of web reinforcements. it is assumed that, the total carried shear force by rc deep beam provided by two independent resistance, namely diagonal concrete strut due to strut-and-tie mechanism ...

background: the purpose of this study was to investigate the application of the monte carlo technique to calculate and analysis of dosimetric parameters for electron beams used in radiotherapy. this technique is based on statistical method and has a powerful role in different radiotherapy aspects. materials and methods: the simulated medical linear accelerator was the varian clinac 2100c. the e...

A nano-optical conveyor belt is a unique type of near-field optical tweezer, capable not only capturing nanoparticles, but also transporting them. In this study, we propose multichannel conveyer, based on simple rectangular distributed grating array. The design was optimized by varying the number slits in gratings, and particle transport achieved adjusting phase difference excitation beams. Sim...

a 37 - year- old man came to the hospital with a history of penetrating thoracoabdominal trauma due to gunshot wound in 10 days before. he underwent laparatomy and hepatorrhaphy in that time and right sided chest tube was inserted. chest ct scan revealed metallic foreign body in lung tissue due to bullet burst. right thoracotomy was performed and metallic foreign body extracted from lung tissue

Many interesting phenomena, such as quantization of Landau levels and quantum Hall effect, can occur in an electronic system under a strong magnetic field. However, photons do not carry charge, they have many properties induced by external fields, either. Recently, the pseudomagnetic field, artificial synthetic gauge has attracted intense research interest classical wave systems, which propagat...

high performance fiber reinforced cementitious composite (hpfrcc) materials exhibit strain hardening behavior with multiple cracking under tensile loading. in this paper, experimental and parametric studies are performed to assess the influence of using hpfrcc material instead of normal concrete in reinforced concrete beams. after calibrating the experimental results, the analytical results inc...

Generally, focused ion beams are generated via the ionization process of liquid metal sources (LMISs); LMIS components made from pure metals or alloys. Because high operating cost associated with LMISs, suitable alternatives for a low-cost beam source must be explored. In this study, Co nitrate solution containing ethanol and 2-(2-butoxyethoxy) solvent was prepared to form an metallic ions. The...

relative diffuse reflection measurements from the original and ground surfaces using a he-ne laser are reported. the intensity measurements for the metallic, transparent dielectric, matte plastic surfaces and colored papers are presented. our results indicate that among metallic surfaces tested, aluminum has the highest diffuse reflectance; while the original stainless steel surface shows the l...

metallic nanoparticles can exhibit very large optical extinction in the visible spectrum due to localized surface plasmon resonance. spherical plasmonic nanoparticles have been the subject of numerous studies in recent years due to the fact that the scattering response of spheres can be analytically evaluated using mie theory. however a major disadvantage of metallic spherical nanoparticles is ...

A very general beam solution of the paraxial wave equation in circular cylindrical coordinates is presented. We call such a field a circular beam (CiB). The complex amplitude of the CiB is described by either the Whittaker functions or the confluent hypergeometric functions and is characterized by three parameters that are complex in the most general situation. The propagation through complex A...