the aims of surgical treatment for cholesteatoma include complete removal of disease and formation of a dry, self cleaning ear in addition to hearing reconstruction. this presentation concentrates on techniques of open mastoid surgery or modified radical mastoidectomy to achieve a well-constructed cavity. this study analyzes both primary and revision mastoid surgery referred to the author. all ...

In article number 2007051, Shuo Shi, Chunyan Dong, and co-workers present a stimuli-responsive multifunctional anti-tumor nanoplatform. Its photothermal effect ablates local tumor cells while strengthening infiltration of T lymphocytes. The released AUNP-12 PQ912 remarkably relieve both the innate adaptive immunosuppression in microenvironment. synergized dual immune checkpoint blockading thera...

a mixed solar dryer with a specific mechanism to vary the tilted angle of collector, is utilized to fulfill all tests. the efficiency of the dryers is low because of various reasons such as heat loss of air in an open flow circuit. getting air back toward the air inlet of dryer can increase the efficiency of dryer and decrease drying process period. a new mechanism considered for dryer which co...

Abstract Urban afforestation is an important strategy for promoting sustainable urban development. In cities where large new green spaces are not available, the planting of curbside trees deemed to be strategy. However, variations in ecosystem services provided by street tree assemblages across socioeconomic gradients have been unexplored. We examined such along urban–suburban continuum. Our fi...

tehran is one of the most polluted metropolises in the world. sink capacity for absorption and assimilation of pollution is reduced generally due to failure in inclusion of ecological aspects in regional land use development planning. the present condition of air and water related issues in tehran are greatly affected by landscape structural alterations at urban level. in this research the focu...

Air-conditioning plants With air as working fluid In open cycle have been wtdely employed and they provtde high performances In terms of compactness and low weight. In the on-aboard systems Interesting developments have been obtained as well as In the land applications same good improvements can be expected. As a matter of fact the absolute lack of pollution problems and the compactne:ss can ma...

Despite their current prevalence and historical significance, much is unknown about the economics of open air markets. This paper uses open air markets as a natural laboratory to provide initial insights into the underlying operation of such markets. Using data gathered from thousands of individual observations, I find that the natural pricing and allocation mechanism in open air markets is cap...