This paper describes a strategic level simulation model developed to help stakeholders understand the Los Angeles solid waste system. The model structure is based on a “recycling loop” incorporating five interconnected sectors: consumption, collection, processing, disposal, and production. The user interface includes eight strategic decision levers (product durability, waste in products and pac...

The statistical mechanics of a treelike polymer in a confining volume is relevant to the packaging of the genome in RNA viruses. Making use of the mapping of the grand partition function of this system onto the statistical mechanics of a hard-core gas in two fewer spatial dimensions and of techniques developed for the evaluation of the equilibrium properties of a one-dimensional hard rod gas, w...

Low temperature Plasma (LTP) is a high-energy gas that is created when an electrical current is passed through a gas. Until recently, plasmas could only be created at relatively high temperatures in a vacuum and the use of plasma on sensitive materials such as human tissue, food products, medical devices and the packaging industry, was therefore impractical. However, over the last few years tec...

respiration is one of the important factors to be considered in a determination of the quality of cut flowers during their postharvest preservation period. modified atmospheric packaging (map) is an effective way of reducing respiration rate along with increasing vase life while the quality of cut flowers also well maintained. this research was conducted on the basis of a factorial experiment, ...

the purpose of food packaging is to preserve the quality and safety of the food it contains from the time of manufacture to the time it is used by the consumer. recently, the demand for safe and high quality foods, as well as changes in consumer preferences have led to the development of innovative and novel approaches in food packaging technology. one such development is the active food packag...

Seal area represents the most problematic part in food packaging for controlling moisture and gas ingress preserving product quality. Understanding mechanism of heat sealing, which is a widely used method flexible packaging, critical maintaining quality throughout storage preventing waste. Likewise, understanding factors causing leak formation seal interface helps to avoid failures increase int...

The atmosphere surrounding the food also influences the shelf life of processed foods. For some processed foods, a lowering of oxygen is beneficial, slowing down discoloration of cured meats and powdered milk and preventing rancidity in nuts and other high fat foods. High carbon dioxide and low oxygen levels can pose a problem in fresh produce leading to anaerobic metabolism and rapid rotting o...

The need of constraining the temporal relationships among sets of related events arises in several temporal reasoning tasks, including monitoring, plan validation, planning, and diagnosis. Process constructors provide an e ective way of packaging up related events into individual conceptual chunks, called macro-events. In this paper, we present a rst attempt at de ning a Calculus of Macro-Event...

Respiration rate and gas exchange through the package material are the processes involved in creating a modified atmosphere inside a package that will extend shelf life of fresh fruits and vegetables. Thus, modelling respiration rate of the selected produce is crucial to the design of a successful modified atmosphere packaging (MAP) system. In this paper, general aspects of the respiration proc...

The implementation of a microfluidic ‘detector cell’ is presented, which integrates a nanofabricated chemiresistor (CR) array with monolithic CMOS baseline cancellation circuitry and a microfluidic chamber for use in a micro-scale gas chromatograph (mGC). A robust packaging method was developed to facilitate a microfluidic interface between the detector cell and external mGC components while al...