In this study, urease production was investigated among thirteen strains of Aspergillus niger seven strains isolated from soils of Semnan province in Iran and six strains obtained from Persian Type Culture Collection (PTCC). The enzyme production was screened in two submerged media quantitatively. The registered PTCC 5011 and the native S31 strains showed more urease production than the other e...

This paper will present the cache performance analysis of Chronological Garbage Collection algorithm used in the LVM system. The LVM is a new Logic Virtual Machine for Prolog. It adopts one stack policy for all dynamic memory requirements and cooperates with an efficient garbage collection algorithm, the Chronological Garbage Collection, to recuperate space not as deliberate garbage collection ...

Generational garbage collection is an established method for creating eecient garbage collectors. Even a simple implementation where all nodes that survive one garbage collection are tenured, i.e., moved to an old generation , works well in strict languages. In lazy languages, however, such an implementation can create severe temporary space leaks. The temporary space leaks appear in programs t...

Gardens is a system which supports parallel computation across networks of workstations. This is achieved by over decomposing a program into more tasks than there are processors. Tasks have separate heaps which comprise partitions (segments) of a global address space. Gardens supports a modern object oriented programming language which requires garbage collection. Furthermore since tasks may be...

In algorithms based on reference counting, a garbage-collection decision has to be made whenever a pointer x→ y is about to be destroyed. At this time, the node y may become dead even if y’s reference count is not zero. This is because y may belong to a piece of cyclic garbage. Some aggressive collection algorithms will put y on the list of potential garbage regardless of y’s reference count. L...

Garbage collection prevents security vulnerabilities that can otherwise be caused by incorrect manual memory management at the cost of increased runtime and space overheads. In some domains, the runtime overhead and unpredictable, lengthy pauses for garbage collection could be deemed unacceptable. Decades of research have proposed incremental, concurrent, and generational garbage collection as ...


 Global plastic pollution in waterways is a serious environmental concern predicted to increase the coming years with many groups currently invested monitoring and removing plastics from aquatic ecosystems. Still, available data on sources pathways of larger floating freshwater environments scarce. To bridge this gap, we present computer vision model prototype identify trash primarily nat...