CEP June 2007 www.aiche.org/cep 53 During the past few decades, pollution prevention and control has assumed a prominent role in the chemical engineering profession. Its study has become part of chemical engineering curricula throughout the world, and a new section on waste treatment has been added to “Perry’s Chemical Engineers’ Handbook.” The major responsibility for an operating plant’s clea...

E-waste or electronic waste is a major waste stream resulting from the boom in consumer electronics in the past decades. With the rapid pace of technology innovation and obsolescence that leads to shortened product lifespans, the growing demand for electronics and its resulting waste poses a significant challenge in every stage of its life-cycle from the utilization of raw materials, production...

BACKGROUND Waste produced in dental clinics has been the topic of investigations for many years. These waste materials have important health impacts and are hazardous to humans and the environment. OBJECTIVE To investigating solid waste production and its management in dental clinics in Gorgan, northern Iran. METHODS In this cross-sectional study, 45 of 143 public dental practices and 5 of ...

The design of an interface between two systems depends upon the way in which the systems are understood and characterized by the designer. Digital computation and the concomitant understanding of cognition as a computational process allowed the interface to be developed as a surface of contact between two symbol-processing systems. This paper suggests that as embodied, situated and to an increa...

Skip connections made the training of very deep networks possible and have become an indispensable component in a variety of neural architectures. A completely satisfactory explanation for their success remains elusive. Here, we present a novel explanation for the benefits of skip connections in training very deep networks. The difficulty of training deep networks is partly due to the singulari...

Trachoma is the leading cause of preventable blindness worldwide. Although it disappeared long ago from Western Europe and the United States, trachoma is still as endemic as ever in parts of Africa, the Middle East, Australia, and South East Asia. Ocular strains of Chlamydia trachomatis cause repeated episodes of conjunctivitis in children. In teenagers and adults, the disease progresses throug...

Skip connections made the training of very deep networks possible and have become an indispensable component in a variety of neural architectures. A completely satisfactory explanation for their success remains elusive. Here, we present a novel explanation for the benefits of skip connections in training very deep networks. The difficulty of training deep networks is partly due to the singulari...

background: dental waste can be hazardous to humans and the environment. objective: to determine the current status of dental waste management in private and public dental clinics and private dental offices in shiraz, southern iran. methods: this cross-sectional study was conducted at the shiraz university of medical sciences from february through june 2013. a stratified random sampling method ...

odor emission is a common environmental problem in septic tank. the feasibility of using trickling filter to eliminate the malodorous gases from the septic tank was studied. a trickling filter is set up at the outlet of the waste gases of the septic tank, which was attached to the university's cafeteria. in this investigation, the trickling filter system was used, measuring the hydrogen sulfide...