Nikos Kostopoulos

ORCID: 0009-0003-6033-0191
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About
Contact & Profiles
Research Areas
  • Sports Performance and Training
  • Sports injuries and prevention
  • Network Security and Intrusion Detection
  • Blockchain Technology Applications and Security
  • Internet Traffic Analysis and Secure E-voting
  • Muscle metabolism and nutrition
  • Exercise and Physiological Responses
  • Cardiovascular and exercise physiology
  • Caching and Content Delivery
  • Sport Psychology and Performance
  • Pregnancy-related medical research
  • Gestational Diabetes Research and Management
  • Genetics and Physical Performance
  • IoT and Edge/Fog Computing
  • Nonmelanoma Skin Cancer Studies
  • Software-Defined Networks and 5G
  • Cardiovascular Issues in Pregnancy
  • Shoulder Injury and Treatment
  • Muscle and Compartmental Disorders
  • Cardiovascular Effects of Exercise
  • Obesity, Physical Activity, Diet
  • Physical Activity and Health
  • Spinal Cord Injury Research
  • Acupuncture Treatment Research Studies
  • Internet of Things and AI

University of Patras
2023-2025

National and Kapodistrian University of Athens
2014-2025

Ericsson (Greece)
2019-2024

National Technical University of Athens
2019-2023

Institute of Communication and Computer Systems
2022

IMT Atlantique
2022

Université de Rennes
2022

Institut de Recherche en Informatique et Systèmes Aléatoires
2022

Orange (France)
2022

INTRASOFT International (Luxembourg)
2021

ABSTRACTThe purpose of this study was to compare the effects 3 different training protocols—plyometric training, weight and their combination—on selected parameters vertical jump performance leg strength. Forty-one men were randomly assigned 1 4 groups: plyometric

10.1519/1533-4287(2000)014<0470:eopetw>2.0.co;2 article EN The Journal of Strength and Conditioning Research 2000-01-01

Objectives: This paper addresses the problem of secure data storage and sharing over cloud infrastructures. A secure, distributed structure incorporating blockchain is proposed that supports confidentiality, integrity, availability. Methods/Analysis: The combines two well-known technologies: one them Ethereum Blockchain its Smart Contracts other RSA encryption authentication scheme. used as a structure, which ensures availability integrity while provides sensitive confidentiality source...

10.28991/esj-2023-07-02-012 article EN cc-by Emerging Science Journal 2023-02-14

Team offense in basketball games consists of a set offensive actions carried out with the cooperation two or more players. Of these actions, most commonly used last decade is on-ball screen called "pick and roll." The aim this study was to analyze all pick rolls conducted Euroleague championship from 24 participating teams investigate possible relationships between success roll overall teams. For purpose, 12,376 502 matches were analyzed classified categories according end result possession....

10.1515/hukin-2015-0176 article EN Journal of Human Kinetics 2016-06-01

Soccer is a complex sport, and balance appears to play crucial role in the quality execution of technical skills, which are mostly performed while standing on one foot. Nevertheless, younger ages, when learning still affects soccer performance, effect balance-training program player’s skills remains unexplored. This research examined (BTP) adolescent players. Τhe participating volunteers were thirty-two players (12-13 years old with 3.84 ± 0.95 practice), randomly separated into two groups:...

10.52082/jssm.2023.645 article EN cc-by-nc-nd Journal of Sports Science and Medicine 2023-10-06

Domain Generation Algorithms (DGA's) have been employed by botnet orchestrators for controlling infected hosts (bots), while evading detection performing multiple DNS requests, mostly non-existing domain names. With blacklists ineffective, modern DGA filtering methods rely on Machine Learning (ML). Emerging needs higher intrusion accuracy lead to complex, non-interpretable black-box classifiers, thus requiring eXplainable Artificial Intelligence (XAI) techniques. In this paper, we utilize...

10.1109/access.2023.3286313 article EN cc-by IEEE Access 2023-01-01

This study examined the impact of three pre-season fitness training protocols with different frequencies (heavy, moderate and light) on physical abilities biochemical indicators muscle damage oxidative stress in female basketball athletes as expressed through physiological assessments. Also, a comparison search for correlations were made between changes that caused by each protocol. The sample consisted 28 professional athletes, who competed teams, protocol was assigned to teams....

10.3390/app15041833 article EN cc-by Applied Sciences 2025-02-11

Background/Objectives: The primary aim of the study was to investigate self-reported behavior and practice healthcare professionals (midwives obstetricians) regarding physical activity during second third trimesters pregnancy. secondary goal highlight sociodemographic professional characteristics affecting aforementioned behavior. Methods: cross-sectional design conducted between January 2022 March 2023 with participation 235 midwives obstetricians working in public private facilities region...

10.3390/clinpract15030045 article EN cc-by Clinics and Practice 2025-02-24

Blockchain technology has emerged as a disruptive force in the world of digital transactions, with applications across wide range industries. This paper provides comprehensive review potential blockchain technology, including finance, healthcare, supply chain management, and voting. The discusses benefits challenges using well real-world case studies its implementation. concludes suggestions for future research, exploring new addressing associated use technology.

10.47577/technium.v11i.9132 article EN Technium Romanian Journal of Applied Sciences and Technology 2023-07-07

Healthcare professionals appear to play a key role in shaping pregnant women's views and attitudes towards lifestyle issues, such as exercise. The aim of this study is investigate the beliefs Greek midwives obstetricians regarding exercise during pregnancy. This cross-sectional conducted period January 2022-March 2023. For study, 237 employed healthcare settings Attica, Greece completed an anonymous self-report questionnaire. Four different/independent models multivariate analyses variance...

10.3390/healthcare12111089 article EN Healthcare 2024-05-25

Just before the commercial roll-out of European 5G networks, trials in realistic environments have been recently initiated all around Europe, as part Phase 3 projects 5GPPP H2020 program [1]. The goal is to showcase 5G's capabilities and convince stakeholders about its value-adding business potential. approach offer advanced connectivity real vertical industries how it enables them overcome existing 4G network limitation other long-standing issues. EVE project [2] offers cutting-edge...

10.1109/eucnc.2019.8801959 preprint EN 2019-06-01

AbstractThe lipid profile of elite basketball and soccer athletes was evaluated compared with that inactive individuals. Total cholesterol (T-C), low high density lipoprotein (LDL-C HDL-C), triglyceride (TG) concentration were measured in the morning after a or match. All parameters at fasted resting state, except HDL-C, lower controls (p < 0.01). The match resulted greater decrease TG (78.3 ± 6.7 to 70.7 6.3, p 0.01), T-C (179.3 10.7 171.6 9.6, LDL-C (110.9 8.9 103.5 7.5, 0.01) only (126.8...

10.1080/15438627.2013.852095 article EN Research in Sports Medicine 2014-01-02

Jumping ability in basketball is usually assessed using standardized vertical jump tests. However, they lack specificity and do not consider the player’s skills. Several studies have suggested performing specific tests, which are tailored to movement patterns requirements of a game. The pivot step test (PSJT) novel designed evaluate jumping abilities players by combining on one leg with maximum bilateral jump. This study had two aims: determine reliability validity PSJT typical tests as...

10.3390/jfmk7040116 article EN cc-by Journal of Functional Morphology and Kinesiology 2022-12-15

The purpose of the present study was to define maximal lactate steady state (MLSSmeas) in high-level male basketball players and compare it with turnpoint (LTP) respective point derived form a prediction method (MLSScal). Twelve underwent one several submaximal tests on treadmill different days where MLSS LTP were measured. MLSSmeas observed at 75% speed, 77% VO2max, 88% HRmax [La-] 3.7 mmol.l-1. No differences between any measured variables. A good agreement LTP, as well MLSScal. Therefore,...

10.1080/15438627.2018.1511559 article EN Research in Sports Medicine 2018-08-20

The aim of this study is to investigate healthcare professionals' attitudes and practices when it comes their recommendations on exercise during the first trimester pregnancy highlight factors that influence or predict these attitudes. This cross-sectional was conducted between January 2022 March 2023, a sample 237 Greek professionals (midwives obstetricians) employed in settings Attica/Greece. In statistical analysis, eight independent models multivariate analyses variance were conducted....

10.3390/sports12070173 article EN cc-by Sports 2024-06-24

The purpose of the present investigation was to examine levels muscle soreness, damage, and performance output in men with (S, n = 24) or without (A, chronic compartment syndrome (CACS)-related symptoms after an intense 10-minute basketball-simulated exercise. Anterior pressure (ICP), soreness perception, creatine kinase (CK) lactate dehydrogenase (LDH) activities, myoglobin (Mb) concentration, leg strength, knee joint range motion (KJRM) were measured at rest, immediately exercise, 24, 48,...

10.1519/11351.1 article EN The Journal of Strength and Conditioning Research 2004-01-01

Abstract Network providers either attempt to handle massive distributed denial-of-service attacks themselves or redirect traffic third-party scrubbing centers. If adopt the first option, it is sensible counter such in their infancy via provider collaborations deploying security mechanisms across multiple domains an attack path. This motivated our work presented this paper. Specifically, we investigate establishment of trusted federations among adjacent and disjoint network domains, that is,...

10.1017/s0269888920000259 article EN The Knowledge Engineering Review 2020-01-01

This study aimed to investigate the effects of a 6-week preseason functional and plyometric fitness training protocol, on physiological biochemical markers performance exercise-induced muscle damage, compare response these between high-level female male basketball players. The sample consisted 19 professional athletes (10 male; 9 female) competing in two different teams. examined were body mass, BMI, fat percentage, speed, acceleration, explosiveness, vertical jumping ability, creatine...

10.3390/sports11110229 article EN cc-by Sports 2023-11-16

Interconnected cyber infrastructures, accessible via the Internet, are a common target of DDoS attacks intending to downgrade their operations and services. Collaborative protection mechanisms prime candidates defend against massive but, although collaborations were instrumental in Internet success story, this is largely not extended multi-domain security. Notably, collaborative detection hindered by data privacy legislations, while mitigation limited stand-alone rigid firewalls. Motivated...

10.1109/cloudnet55617.2022.9978815 article EN 2022-11-07

In this paper we utilize XDP for DNS Deep Packet Inspection (DPI) in order to mitigate Water Torture attacks at the NIC driver level of Authoritative Servers. Our approach may benefit Administrators who wish filter attack traffic within their infrastructure and avoid latency overhead additional costs imposed by external cloud scrubbing services. schema does not depend on specialized hardware blacklist entire domain name suffices, hence block legitimate requests. Packets are intercepted that...

10.1109/netsoft48620.2020.9165454 article EN 2020-06-01
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