A corrected equation for the concentrations in the drift tube of a proton transfer reaction-mass spectrometer (PTR-MS) is presented which ccounts for the different mobility of primary ions and protonated analyte volatile organic compounds (VOCs). As a consequence, the calculation f VOC concentrations from the measured count rates requires as well a correction factor, equalling the ratio of (i) ...

Carrier mobility is one of the most important parameters for semiconducting materials and their use in optoelectronic devices. Here we report a systematic first principles analysis of the acoustic phonon scattering mechanism that limits the mobility of CH3NH3PbI3 (MAPbI3) perovskites. Due to the unique hybrid organic-inorganic structure, the mechanical, electronic and transport properties are d...

The reasons for the relatively low transport mobility of graphene grown through chemical vapor deposition (CVD-G), which include point defect, surface contamination, and line defect, were analyzed in the current study. A series of control experiments demonstrated that the determinant factor for the low transport mobility of CVD-G did not arise from point defects or surface contaminations, but s...

We investigated the migration of a symmetric tilt, low-angle grain boundary (LAGB) under applied shear stress in the presence of extrinsic dislocations. The results demonstrate that there is a threshold stress for the LAGB to depin from extrinsic dislocations. Below the threshold stress, the LAGB remains immobile at zero dislocation climb mobility, while for finite climb mobilities, it migrates...

As a significant factor in urban planning, traffic forecasting and prediction of epidemics, modeling patterns of human mobility draws intensive attention from researchers for decades. Power-law distribution and its variations are observed from quite a few real-world human mobility datasets such as the movements of banking notes, trackings of cell phone users’ locations and trajectories of vehic...

In this study, we investigate the effect of annealing and nitrogen amount on electronic transport properties in n- and p-type-doped Ga0.68In0.32NyAs1 - y/GaAs quantum well (QW) structures with y = 0%, 0.9%, 1.2%, 1.7%. The samples are thermal annealed at 700°C for 60 and 600 s, and Hall effect measurements have been performed between 10 and 300 K. Drastic decrease is observed in the electron mo...

Drawing on detailed interviews with 60 recent migrants to Ireland, we discuss the extent and nature of patient mobility. The paper is framed by the typology of patient mobility outlined by Glinos et al. (2010), which highlights patient motivation and funding. We pay particular attention to four key areas: availability of health care for migrants living in Ireland; affordability of care as a pus...

Scapular mobility plays a central role in normal shoulder function, and alterations in scapular mobility have been suggested as a factor in impingement syndrome. We therefore measured the effect of restricted scapular mobility during arm abduction on acromiohumeral and coracohumeral distances. For the control measurements, healthy volunteers (n = 10, all male, age range 25-35 years) underwent m...

conclusions the findings showed that personal, interpersonal, and functional skills can facilitate nurses’ career advancement. the effects of these skills on career advancement depend on a variety of conditions that require further studies. results the three themes extracted from the data included interpersonal capabilities, competency for career success, and personal capacities. the results sh...

extract: physical mobility and exercise are necessary for people health. for patient with mobility limitation this issue has more importance because these exercises help them to return to normal function more effectively. since the individual planning for each patient is not time effective, so we could plan group exercises and perform properly in orthopedic wards. the important goals of this pl...