Abstract Liquefied natural gas (LNG) is a binary mixture of methane (R50) and ethane (R170). Proper evaluation the heat transfer coefficient during flow boiling such very important to design LNG facilities. Pure fluid correlations have been tested with without adoption corrections account for lowered performance due mass resistances arising both in nucleate convective regimes. In total, predict...

INTRODUCTION The aim of this study was to compare various coplanar and non-coplanar 3-dimensional conformal radiation therapy (3DCRT) beam arrangements for the delivery of stereotactic ablative radiation therapy (SABR) to patients with early stage lung cancer, based on the dosimetric criteria from the Radiation Therapy Oncology Group (RTOG) 1021 protocol. METHODS Ten medically inoperable lung...

AIM To investigate the incidence of fracture and deformation observed on Reciproc instruments after clinical use. METHODOLOGY A total of 1696 Reciproc NiTi instruments that were discarded after normal clinical usage over 30 months were collected. Of these 1580 instruments were R25 (93%), 76 were R40 (5%), and 40 were R50 (2%). The treatments included 3780 root canal preparations, 3023 primary...

BACKGROUND South Africa is providing antiretroviral (ARV) drugs for HIV/AIDS free of charge in order to increase access for poorer patients and promote adherence. However, non-drug costs of obtaining treatment may limit access. We estimated the costs that South African patients incur in obtaining antiretroviral therapy (ART). METHODS A random sample of adult pre-ART and ART patients attending...

We have examined the correlations between the large-scale environment of galaxies and their physical properties, using a sample of 28,354 nearby galaxies drawn from the Sloan Digital Sky Survey, and the large-scale tidal field reconstructed in real space from the 2Mass Redshift Survey and smoothed over a radius of ∼ 6hMpc. The largescale environment is expressed in terms of the overdensity, the...

Lung cancer has become one of the malignant tumors with highest morbidity and mortality rate worldwide. The early images lung are pulmonary nodules, detection diagnosis can help reduce incidence cancer. However, due to large differences in shape, size location nodules medical imaging, small is very challenging. This paper proposes a new model, based on improved YOLOv5s, called YOLOv5-CASP. prop...