conclusions it is concluded that cryptosporidium spp. should be considered in immunocompromised diarrheal patients and elisa must be chosen for detection of this parasite. modified acid fast staining and cassette kit techniques could be performed if elisa is not available. the single use of the cassette kit will be inadequate for the diagnosis of cryptosporidiosis. background cryptosporidiosis ...

fauna of the aphidiinae (hymenoptera: braconidae) of iran is reviewed and the data on their host aphid associations are summarized. seventy-eight species belonging to 17 genera of aphidiinae are listed in the associations with 193 aphid species. a total of 491 parasitoid-aphid associations are presented. the distribution of the aphidiinae species in different parts of iran and other countries i...

chromatomyia horticola (goureau) (diptera: agromyzidae) is a highly polyphagous leaf miner that causes severe damage to different crops. sampling on the alysiinae (braconidae) parasitoids of c. horticola was performed at various locations of kermanshah province during 2009–2010. infested leaves of host plants bearing the larvae and puparia of c. horticola were collected and placed inside the pl...

Self-securing storage prevents intruders from undetectably tampering with or permanently deleting stored data. To accomplish this, self-securing storage devices internally audit all requests and keep all versions of all data for a window of time, regardless of the commands received from potentially compromised host operating systems. Within the window, system administrators are guaranteed to ha...

Live virtual machine migration allows the movement of a running VM from one physical host to another with negligible disruption in service. This enables many compelling features including zero downtime hardware upgrades, dynamic resource management, and test to production service migration. Historically, live migration worked only between machines that shared a common local subnet and storage s...

In this paper, a volume management scheme that supports multi-host environments is designed and implemented. The proposed scheme provides various features for enterprise internet services such as online resizing, online migration and an enhanced configuration scheme considering workload access patterns and disk geometry. The SANfs is a shared file system in which multiple hosts can share multip...

Failure is inevitable: disks fail, hosts crash, networks partition, applications stop. Consequently, the principal challenge in designing highly-available systems is to tolerate each failure as it occurs and recover from its effects. For large systems, or systems with unreliable components, such failures can cease to be exceptional events, but instead may become the common case. Perhaps no desi...

We present Fatman, an enterprise-scale archival storage based on volunteer contribution resources from underutilized web servers, usually deployed on thousands of nodes with spare storage capacity. Fatman is specifically designed for enhancing the utilization of existing storage resources and cutting down the hardware purchase cost. Two major concerned issues of the system design are maximizing...

All tape drives have a buffer memory in which incoming data are stored. When a write command This paper describes a method for fast backups is accepted, as much data as possible is transferred and restores on tape drives. By using a tight into the buffer and the (slower) physical writing synchronization between disk and tape accesses, on the tape starts. When the last byte of data from the tota...