R. S. Runkle und G. B. Phillips (Editors). Microbial Contamination Control Facilities (Aus der Reihe Environmental Engineering Series). X und 198 S., 63 Abb., 10 Tab. New York-London 1969. Van Nostrand Reinhold Comp. L 5, 12 s

1970 ◽  
Vol 10 (8) ◽  
pp. 649-649
Author(s):  
A. C. Schwartz
Author(s):  
Ozgur Yildirim

The purpose of this qualitative study was to investigate the adjustment problems experienced by a group of Turkish dual diploma students studying in the USA. The participants of the study were 18 undergraduate Turkish students studying in the Environmental Engineering and Civil Engineering dual diploma programs offered by a state university in New York and a state university in Turkey. The data were collected by using 15 interview questions and were analyzed by using constant comparative method in which emerging categories were identified in the interview transcripts and themes were developed from those categories. Analysis of the data indicated six major categories of the factors affecting the adjustment problems: differences in educational systems of the two institutions; English proficiency; the unique design of the program; cultural differences between the two countries; tendency to form and stay in cliques of dual diploma students; and orientation.


2008 ◽  
Vol 51 (1) ◽  
pp. 1-5
Author(s):  
Diana Granitto

By 1958, the nascent environmental engineering profession had moved from wartime activities into the space age, and this journal began documenting the evolution of an industry. Over the past five decades and under as many titles, the Journal has witnessed advances into contamination control, ecological sciences, and nanotechnology, to name a few.


Author(s):  
Francesco Romano ◽  
Samanta Milani ◽  
Roberto Ricci ◽  
Cesare Maria Joppolo

In Operating Theatres (OT), the ventilation system plays an important role in controlling airborne contamination and reducing the risks of Surgical Site Infections (SSIs). The air cleanliness is really crucial in this field and different measurements are used in order to characterize the situation in terms of both airborne microbiological pollutants and particle size and concentration. Although the ventilation systems and airborne contamination are strictly linked, different air diffusion schemes (in particular, the Partial Unidirectional Airflow, P-UDAF, and the Mixing Airflow, MAF) and various design parameters are used, and there is still no consensus on real performance and optimum solutions. This study presents measurements procedures and results obtained during Inspection and Periodic Performance Testing (1228 observations) in a large sample of Italian OTs (175 OTs in 31 Italian hospitals) in their operative life (period from 2010 to 2018). The inspections were made after a cleaning procedure, both in “at-rest” conditions and “in operation” state. Inert and microbial contamination data (in air and on surfaces) are analyzed and commented according to four relevant air diffusion schemes and design classes. Related data on Recovery Time (RT) and personnel presence were picked up and are commented. The results confirm that the ventilation systems are able to maintain the targeted performance levels in the OT operative life. However, they attest that significant differences in real OT contamination control capabilities do exist and could be ascribed to various design choices and to different operation and maintenance practices. The study shows and confirms that the air diffusion scheme and the design airflow rate are critical factors. Beside large variations in measurements, the performance values, in terms of control of airborne particle and microbial contamination (in air and on surfaces), for P-UDAF systems are better than those that were assessed for the MAF air diffusion solution. The average performances do increase with increasing airflows, and the results offer a better insight on this relationship leading to some possible optimization.


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