The advent of all-sky facilities, such as the Neil Gehrels Swift observatory, All Sky Automated Search for Supernovae (ASAS-SN), eROSITA and Gaia has led to a new appreciation importance transient sources in solving outstanding astrophysical questions. Identification catalogue cross-matching transients been eased over last two decades by Virtual Observatory but we still lack client capable prov...

This paper analyzes the problem of checking the integrity of files stored on remote servers. Since servers are prone to successful attacks by malicious hackers, the result of simple integrity checks run on the servers cannot be trusted. Conversely, downloading the files from the server to the verifying host is impractical. Two solutions are proposed, based on challenge-response

Some servers are to be located at nodes of a network. Demand for services of these servers is located at each node and a subset of the nodes is to be chosen to locate one server in each. Each customer selects a server with a probability dependent on distance and a certain amount of benefit is achieved after giving service to the customer. Customers may waive receiving service with a known prob...

A buyer that depends on suppliers for the delivery of a service or the production of a make-to-order component should pay close attention to the suppliers’ service or delivery lead times. This paper studies a queueing model in which two strategic servers choose their capacities/processing rates and faster service is costly. The buyer allocates demand to the servers based on their performance; t...

A digital twin uses a virtual model of the physical system to fulfill diverse requirements (e.g., latency, reliability, quality experience) for emerging vehicular network applications. Although twin-based implementation networks can offer performance optimization, modeling is significantly challenging task. Federated learning (FL) better privacy-preserving, distributed scheme that be used model...

objectives the overall goal of this study was to carry out a set of comparative analyses of arsr gene in plasmid r773 and bacterial chromosome from escherichia coli bl-21(de3). methods pdb and ncbi databases and chimera, mega4, clc main workbench software and 3d-jigsaw and embl-ebi servers were applied to perform this study. by using these software and servers, multiple analyses including deter...

We consider a class of power two choice based assignment policies for allocating users to servers, where both and servers are located on two-dimensional Euclidean plane. In this framework, we investigate the inherent tradeoff between communication cost, load balancing performance different allocation policies. To end, first design evaluate Spatial Power (sPOT) policy in which each user is alloc...

This paper considers a simple discrete-time queueing model with two types (classes) of customers (types 1 and 2) each having their own dedicated server (server A and B resp.) New customers enter the system according to a general independent arrival process, i.e., the total numbers of arrivals during consecutive time slots are i.i.d. random variables with arbitrary distribution. Service times ar...