In etiologic research, the goal is to estimate the causal effect of an exposure on a disease outcome, which means the result that would be obtained in a large randomized trial with perfect adherence if exposure could be assigned without regard to the baseline characteristics of the study participants. But there is no reason to think that effects must be homogeneous across units in a randomized ...

This study is concentrated on the natural frequencies and mode shapes of a simple three-member space frame coupled with a dynamic vibration absorber. The dynamic vibration absorber is modeled as a six-degree-of-freedom mass-spring system. For the first time, the free vibration of an elastic structure with a six-degree-of-freedom mass-spring system is found. Each member of the space frame has un...

With the arrival of the era of Internet of Things (IoT), Wi-Fi Direct is becoming an emerging wireless technology that allows one to communicate through a direct connection between the mobile devices anytime, anywhere. In Wi-Fi Direct-based IoT networks, all devices are categorized by group of owner (GO) and client. Since portability is emphasized in Wi-Fi Direct devices, it is essential to con...

There have been few longitudinal studies on sick building syndrome (SBS), which include headache, fatigue, and runny nose. We considered effect of sick building syndrome with illnesses like headache, fatigue and runny nose. Thus, we designed a questionnaire and asked from male of dormitory residence. Questions of the questionnaire were more about known symptoms of buildings (headache, fatigue, ...

The Jackiw-Pi model in 2 + 1 dimensions is a non-relativistic conformal field theory of charged particles with point-like self-interaction. For specific values of the interaction strengths the classical theory possesses vortex and multi-vortex solutions, which are all degenerate in energy. We compute the full set of first-order perturbative quantum corrections. Only the coupling constant g requ...

When soluble earthworm cuticle collagen molecules are subjected to the shearing forces of a flow birefringence instrument, they are broken into particles approximately half the original size. The broken particles resemble vertebrate tropocollagen molecules in their hydrodynamic properties, in levorotatory powers, and in their appearance in the electron microscope. Most significantly, the broken...

This study tries to examine the role of the family on the attitude of the youth for addiction. The survey method was used for analyzing the data from 250 young people from Varamin. The SPSS software was used in the research. The results show that there is a significant relationship between the attitudes toward addiction among the family members, parent's differences, parents' control, leisure a...

Figure/ground assignment – determining which part of the visual image is foreground and which background – is a critical step in early visual analysis, upon which much later processing depends. Previous research on the assignment of figure and ground to opposing sides of a contour has almost exclusively involved static geometric factors – such as convexity, symmetry, and size – in non-moving im...