Електронний архів
Національного університету "Львівська політехніка"
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Recent Submissions
Comparative Analysis of Server and Serverless Cloud Computing Platforms
(Видавництво Львівської політехніки, 2022-02-28) Kotyk, V.; Vavruk, Ye.; Lviv Polytechnic National University
Cloud computing is emerging as a powerful
computing paradigm for the efficient use of resources.
However, decisions to move to cloud computing always
remain risky from the customer’s point of view, considering
the benefits they get from it.
Existing research on cloud computing is more focused on
technical aspects such as security, quality, efficiency, etc.
However, research on the implementation of cloud computing
is at an early stage. Thus, in this article, an attempt is
made to create a model for cost analysis and advantages for
deciding on the application of cloud computing. It takes
into account various organizational parameters, designing
server and serverless architectures using Microsoft Azure
Portal cloud platform services and policies of this organization.
Also, it makes a comparative characterization of these
services according to power and price criteria. A comparative
description of these services according to capacity and
price criteria is also given. It shows the structure of the test
tool for assessment. Evaluation parameters and metrics are
defined.
In addition, this article contains information about approaches
to evaluating cloud platforms according to various
criteria that are most important for a developer.
Features of Development and Analysis of REST Systems
(Видавництво Львівської політехніки, 2022-02-28) Marii, B.; Zholubak, I.; Lviv Polytechnic National University
The paper analyzes and presents the architecture
of REST systems construction. What is the REST API
and why it should be used? It describes the basic principles
for what the system could be called Restful. Examples of
REST-like systems, their comparison, advantages, and
disadvantages of REST, and why this particular architecture
was chosen, have been given. It aims at which technologies
can be used for the REST system, etc. A description
of all technologies used during the development of this
system, with all the advantages and disadvantages of using
certain technologies and the system in general have been
considered. A description of the development environment
and some of its functions have been provided. Implementation
of the REST system is based on the web application of
the forum.
WifiZoneCloud: A Cloud-Based Wi-Fi Hotspot Platform
(Видавництво Львівської політехніки, 2022-02-28) Kose, B. O.; Yaya, S.; Coskun, V.; Mantar, A.; Gebze Technical University; Turcom Technology, Istanbul; Beykent University
Today, there are millions of Wi-Fi hotspots
available by diverse service providers such as operators,
public spaces, enterprises, and even cities. With the developments
on OpenRoaming approach, cloud federation,
automatic global roaming, efficient user onboarding and
network automation have become important requirements
for stakeholders within the ecosystem. This study aims to
present a cloud based hotspot platform solution called
WifiZoneCloud which enriches the limited hotspot capabilities
of new generation firewall, access point and similar
network devices; provides roaming between different locations
of an institution; keeps the use of the network under
control and makes the network reportable, and even performs
required logging. With diverse authentication tools,
the platform ensures high security according to the needs of
users. Above all, these operations are completely administered
in the cloud environment. The proposed new platform
is likely to pave the way for the establishment of the
global Wi-Fi network and present valuable opportunities in the 5G era.
Software System for End-Products Accounting in Bakery Production Lines Based on Distributed Video Streams Analysis
(Видавництво Львівської політехніки, 2022-02-28) Ivanov, Yu.; Sharov, B.; Zalevskyi, N.; Kernytskyi, O.; Lviv Polytechnic National University; Electronic Systems Co. Ltd.
Among the main requirements of modern surveillance
systems are stability in the face of negative influences
and intellectualization. The purpose of intellectualization
is that the surveillance system should perform not only
the main functions such as monitoring and stream recording
but also have to provide effective stream processing.
The requirement for this processing is that the system
operation has to be automated, and the operator’s influence
should be minimal. Modern intelligent surveillance systems
require the development of grouping methods. The context
of the grouping method here is associated with a decomposition
of the target problem. Depending on the purpose of
the system, the target problem can represent several subproblems,
each of which usually accomplishes by artificial
intelligence or data mining methods.
Multi-agent Coordination with Deferred Asynchronous Messaging in a Distributed Coordination Space
(Видавництво Львівської політехніки, 2022-02-28) Botchkaryov, A.; Lviv Polytechnic National University
A method of multi-agent coordination with deferred
asynchronous messaging in a distributed coordination
space has been proposed. The method has been based
on the concept of multi-agent conditional interaction. The
method has used: 1) a distributed coordination space in
which agents move; 2) the rules of state transitions for the
coordination space nodes depending on the movements of
agents; 3) the rules of agents move and state transitions
depending on the states of the coordination space nodes;
4) a multi-agent coordination game based on the coordination
space and the rules. The coordination space has been
implemented based on the distributed shared memory of
agents. The rules have been applied by exchanging deferred
asynchronous messages between agents through the distributed
shared memory. The agent’s decisions about
movement in the coordination space and their consequences
are interpreted according to the rules in asynchronous
messages. Delivery of messages to other agents has
been deferred until these agents visit the corresponding
nodes of the coordination space. This has ensured:
1) mutual exclusion when agents choose conflicting actions,
and 2) resilience of multi-agent coordination to agent failures
and loss of coordinating messages. Four multi-agent
coordination games have been considered as examples. The
issue of fault tolerance of the proposed coordination method
has been considered. The simulation results show that
the use of the method ensures the resilience of multi-agent
coordination to agent failures in the considered coordination
games.