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University · Varna · Bulgaria

Nikola Vaptsarov Naval Academy

In research, Nikola Vaptsarov Naval Academy stands highest in Physical Sciences (#4,064 of 10,670 worldwide) and Engineering (#3,554 of 5,901 worldwide), 2022-now.

naval-acad.bgROR OpenAlex
World rank, 2022-now
#8,547
of 22,385 · #14,151 all time
Rank in Bulgaria
#15
of 64
Research works
480
▲ 64% vs 2018-21
Citations
1.3k
2.7 per fractional work
Top-10% rate
3.8%
all institutions 10.0%
vs its own fields
0.92×
1.00× is exactly expected
Open access
53%
world 40%
International
8%
world 18%
Nikola Vaptsarov Naval Academy

What is Nikola Vaptsarov Naval Academy known for in research?

The fields where it stands highest, 2022-now, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Physical SciencesDomain #4,064 of 10,670 3.1%180 #7294
EngineeringField #3,554 of 5,901 5.2%107 #4937

Each strip is that field's whole ranked pool, with the notch where Nikola Vaptsarov Naval Academy sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no average mark, because the average differs by field (from about 6% in Dentistry to 21% in Economics).

Which fields of science does Nikola Vaptsarov Naval Academy work in?

In 2022-now, 74% of research at Nikola Vaptsarov Naval Academy is in Physical Sciences, 20% in Social Sciences. Its largest fields are Engineering (43%), Computer Science (14%), Social Sciences (10%). It does 1.9× the world's share of Physical Sciences.

Physical Sciences: 185 fractional works · 73.7% of its workEngineering: 109 fractional works · 43.3% of its workElectrical and Electronic Engineering: 23 fractional works · 9.1% of its workOcean Engineering: 17 fractional works · 6.6% of its workControl and Systems Engineering: 16 fractional works · 6.2% of its workAerospace Engineering: 13 fractional works · 5.3% of its workMechanical Engineering: 11 fractional works · 4.3% of its workIndustrial and Manufacturing Engineering: 9 fractional works · 3.5% of its workAutomotive Engineering: 6 fractional works · 2.3% of its workMechanics of Materials: 4 fractional works · 1.6% of its workMedia Technology: 3 fractional works · 1.2% of its workBiomedical Engineering: 3 fractional works · 1.1% of its workComputational Mechanics: 2 fractional works · 0.7% of its workBuilding and Construction: 1 fractional works · 0.5% of its workSafety, Risk, Reliability and Quality: 1 fractional works · 0.5% of its workCivil and Structural Engineering: 1 fractional works · 0.4% of its workComputer Science: 36 fractional works · 14.2% of its workArtificial Intelligence: 13 fractional works · 5.0% of its workInformation Systems: 8 fractional works · 3.3% of its workComputer Networks and Communications: 7 fractional works · 2.8% of its workComputer Vision and Pattern Recognition: 3 fractional works · 1.1% of its workComputational Theory and Mathematics: 2 fractional works · 0.7% of its workComputer Science Applications: 1 fractional works · 0.6% of its workComputer Graphics and Computer-Aided Design: 1 fractional works · 0.5% of its workSmaller subfields together: 1 fractional works · 0.3% of its workEnvironmental Science: 23 fractional works · 9.1% of its workEnvironmental Engineering: 13 fractional works · 5.2% of its workPollution: 5 fractional works · 2.1% of its workManagement, Monitoring, Policy and Law: 1 fractional works · 0.6% of its workEcology: 1 fractional works · 0.4% of its workGlobal and Planetary Change: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.5% of its workEarth and Planetary Sciences: 4 fractional works · 1.8% of its workOceanography: 2 fractional works · 0.8% of its workAtmospheric Science: 1 fractional works · 0.5% of its workSmaller subfields together: 1 fractional works · 0.5% of its workPhysics and Astronomy: 4 fractional works · 1.6% of its workStatistical and Nonlinear Physics: 2 fractional works · 1.0% of its workAtomic and Molecular Physics, and Optics: 1 fractional works · 0.4% of its workAstronomy and Astrophysics: 1 fractional works · 0.2% of its workMathematics: 3 fractional works · 1.3% of its workModeling and Simulation: 2 fractional works · 0.8% of its workDiscrete Mathematics and Combinatorics: 1 fractional works · 0.5% of its workSmaller subfields together: 0 fractional works · 0.0% of its workEnergy: 2 fractional works · 0.8% of its workGeneral Energy: 1 fractional works · 0.4% of its workEnergy Engineering and Power Technology: 1 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.1% of its workChemical Engineering: 2 fractional works · 0.8% of its workFluid Flow and Transfer Processes: 2 fractional works · 0.8% of its workMaterials Science: 2 fractional works · 0.6% of its workGeneral Materials Science: 1 fractional works · 0.5% of its workSmaller subfields together: 0 fractional works · 0.1% of its workChemistry: 1 fractional works · 0.2% of its workSocial Sciences: 51 fractional works · 20.2% of its workSocial Sciences: 24 fractional works · 9.7% of its workTransportation: 8 fractional works · 3.0% of its workPolitical Science and International Relations: 7 fractional works · 2.7% of its workEducation: 4 fractional works · 1.7% of its workSociology and Political Science: 4 fractional works · 1.4% of its workSmaller subfields together: 2 fractional works · 0.9% of its workBusiness, Management and Accounting: 11 fractional works · 4.3% of its workStrategy and Management: 4 fractional works · 1.5% of its workManagement Information Systems: 3 fractional works · 1.1% of its workAccounting: 2 fractional works · 1.0% of its workManagement of Technology and Innovation: 1 fractional works · 0.5% of its workSmaller subfields together: 1 fractional works · 0.3% of its workPsychology: 7 fractional works · 2.6% of its workDevelopmental and Educational Psychology: 4 fractional works · 1.7% of its workExperimental and Cognitive Psychology: 1 fractional works · 0.5% of its workSmaller subfields together: 1 fractional works · 0.5% of its workEconomics, Econometrics and Finance: 5 fractional works · 1.9% of its workEconomics and Econometrics: 4 fractional works · 1.6% of its workGeneral Economics, Econometrics and Finance: 1 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.1% of its workDecision Sciences: 4 fractional works · 1.7% of its workStatistics, Probability and Uncertainty: 2 fractional works · 0.8% of its workManagement Science and Operations Research: 2 fractional works · 0.6% of its workInformation Systems and Management: 1 fractional works · 0.3% of its workArts and Humanities: 0 fractional works · 0.0% of its workHealth Sciences: 11 fractional works · 4.5% of its workMedicine: 9 fractional works · 3.5% of its workPublic Health, Environmental and Occupational Health: 1 fractional works · 0.5% of its workRadiology, Nuclear Medicine and Imaging: 1 fractional works · 0.5% of its workPulmonary and Respiratory Medicine: 1 fractional works · 0.3% of its workSmaller subfields together: 6 fractional works · 2.2% of its workHealth Professions: 1 fractional works · 0.5% of its workRadiological and Ultrasound Technology: 1 fractional works · 0.3% of its workGeneral Health Professions: 1 fractional works · 0.2% of its workDentistry: 1 fractional works · 0.4% of its workGeneral Dentistry: 1 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.1% of its workNursing: 0 fractional works · 0.1% of its workLife Sciences: 4 fractional works · 1.5% of its workAgricultural and Biological Sciences: 2 fractional works · 0.8% of its workPlant Science: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.5% of its workBiochemistry, Genetics and Molecular Biology: 1 fractional works · 0.4% of its workBiophysics: 1 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.1% of its workPharmacology, Toxicology and Pharmaceutics: 0 fractional works · 0.2% of its workNeuroscience: 0 fractional works · 0.1% of its workALL ITS WORKNikola VaptsarovNaval Academy251fractional works, 2022-now
Life Sciences2%Physical Sciences74%Health Sciences5%Social Sciences20%

Each ring splits the one inside it: the four domains of science, their fields, their subfields. Size is fractional works in 2022-now. Every slice is a page; the interactive view zooms down to single topics and colours each by how much more of it this institution does than the world.

Its 4 domains and 25 fields, with their numbers
    1. Engineering10943.3%
    2. Computer Science3614.2%
    3. Environmental Science239.1%
    4. Earth and Planetary Sciences41.8%
    5. Physics and Astronomy41.6%
    6. Mathematics31.3%
    7. Energy20.8%
    8. Chemical Engineering20.8%
    9. Materials Science20.6%
    10. Chemistry10.2%
    1. Social Sciences249.7%
    2. Business, Management and Accounting114.3%
    3. Psychology72.6%
    4. Economics, Econometrics and Finance51.9%
    5. Decision Sciences41.7%
    6. Arts and Humanities00.0%
    1. Medicine93.5%
    2. Health Professions10.5%
    3. Dentistry10.4%
    4. Nursing00.1%
    1. Agricultural and Biological Sciences20.8%
    2. Biochemistry, Genetics and Molecular Biology10.4%
    3. Pharmacology, Toxicology and Pharmaceutics00.2%
    4. Neuroscience00.1%
    5. Immunology and Microbiology00.0%
All of science, and how each field's share has moved since 1950: the Science domain explorer

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.16× its world share, 2 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.08× its world share, 1 worksBiochemistry, Geneti…Immunology and Microbiology: 0.01× its world share, 0 worksImmunology and Micro…Neuroscience: 0.08× its world share, 0 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.57× its world share, 0 worksPharmacology, Toxico…Chemical Engineering: 2.28× its world share, 2 worksChemical EngineeringChemistry: 0.16× its world share, 1 worksChemistryComputer Science: 1.82× its world share, 36 worksComputer ScienceEarth and Planetary Sciences: 1.14× its world share, 4 worksEarth and Planetary …Energy: 0.92× its world share, 2 worksEnergyEngineering: 2.88× its world share, 108 worksEngineeringEnvironmental Science: 1.83× its world share, 23 worksEnvironmental ScienceMaterials Science: 0.18× its world share, 2 worksMaterials ScienceMathematics: 1.11× its world share, 3 worksMathematicsPhysics and Astronomy: 0.71× its world share, 4 worksPhysics and AstronomyDentistry: 0.82× its world share, 1 worksDentistryHealth Professions: 0.19× its world share, 1 worksHealth ProfessionsMedicine: 0.18× its world share, 9 worksMedicineNursing: 0.27× its world share, 0 worksNursingArts and Humanities: 0.02× its world share, 0 worksArts and HumanitiesBusiness, Management and Accounting: 1.33× its world share, 11 worksBusiness, Management…Decision Sciences: 1.76× its world share, 4 worksDecision SciencesEconomics, Econometrics and Finance: 0.88× its world share, 5 worksEconomics, Econometr…Psychology: 0.86× its world share, 7 worksPsychologySocial Sciences: 0.77× its world share, 24 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Engineering, 2.9×. Every wedge is a field page.

All 25 fields, with their numbers
  1. Engineering2.88×108 works
  2. Chemical Engineering2.28×2 works
  3. Environmental Science1.83×23 works
  4. Computer Science1.82×36 works
  5. Decision Sciences1.76×4 works
  6. Business, Management and Accounting1.33×11 works
  7. Earth and Planetary Sciences1.14×4 works
  8. Mathematics1.11×3 works
  9. Energy0.92×2 works
  10. Economics, Econometrics and Finance0.88×5 works
  11. Psychology0.86×7 works
  12. Dentistry0.82×1 works
  13. Social Sciences0.77×24 works
  14. Physics and Astronomy0.71×4 works
  15. Pharmacology, Toxicology and Pharmaceutics0.57×0 works
  16. Nursing0.27×0 works
  17. Health Professions0.19×1 works
  18. Materials Science0.18×2 works
  19. Medicine0.18×9 works
  20. Agricultural and Biological Sciences0.16×2 works
  21. Chemistry0.16×1 works
  22. Biochemistry, Genetics and Molecular Biology0.08×1 works
  23. Neuroscience0.08×0 works
  24. Arts and Humanities0.02×0 works
  25. Immunology and Microbiology0.01×0 works

Who are the top researchers at Nikola Vaptsarov Naval Academy?

Ranked on the quality score, Daniel Veselov Yankov, Khristo Angelov Khristov and Dilyana Dimitrova lead among researchers whose main affiliation is Nikola Vaptsarov Naval Academy.

  1. 1 Daniel Veselov Yankov Bulgaria · #3,915,468 worldwide 140 citations · 24 works
  2. 2 Khristo Angelov Khristov Bulgaria · #4,098,873 worldwide 4 citations · 26 works
  3. 3 Dilyana Dimitrova Bulgaria · #4,322,249 worldwide 28 citations · 15 works
  4. 4 Siyana Lutzkanova Bulgaria · #4,617,931 worldwide 15 citations · 15 works
  5. 5 E. P. Ivanova Bulgaria · #4,666,552 worldwide 7 citations · 16 works
  6. 6 Marieta Stefanova Bulgaria · #4,893,665 worldwide 24 citations · 28 works
  7. 7 Yordan Sivkov Bulgaria · #4,998,740 worldwide 63 citations · 18 works
  8. 8 Boyan Mednikarov Bulgaria · #5,022,103 worldwide 48 citations · 35 works
  9. 9 Mariya Stefanova Nikolova Bulgaria · #5,051,880 worldwide 9 citations · 27 works
  10. 10 Milen Bonev Bulgaria · #5,297,185 worldwide 134 citations · 24 works
All ranked researchers at Nikola Vaptsarov Naval Academy

What are the most cited papers from Nikola Vaptsarov Naval Academy?

The most cited paper from Nikola Vaptsarov Naval Academy is "Breathing 100% oxygen after global brain ischemia in Mongolian Gerbils results in increased lipid peroxidation and increased mortality." (H S Mickel, Y. N. Vaishnav, Oliver S Kempski et al., 1987), with 173 citations. Next come "Neutrophils and neutrophil extracellular traps enhance venous thrombosis in mice bearing human pancreatic tumors" (157) and "Static linear and nonlinear elastic properties of normal and arterialized venous tissue in dog and man." (140).

Most cited papers
#PaperReleasedCitations
1 Breathing 100% oxygen after global brain ischemia in Mongolian Gerbils results in increased lipid peroxidation and increased mortality. H S Mickel, Y. N. Vaishnav, Oliver S Kempski et al. · Stroke Mar 1987 173
2 Neutrophils and neutrophil extracellular traps enhance venous thrombosis in mice bearing human pancreatic tumors Yohei Hisada, Steven Philip Grover, Anaum Maqsood et al. · Haematologica Open access 2 May 2019 157
3 Static linear and nonlinear elastic properties of normal and arterialized venous tissue in dog and man. Robert L.R. Wesly, R. N. Vaishnav, J. C. A. FUCHS et al. · Circulation Research Oct 1975 140
4 Lytic Resistance of Fibrin Containing Red Blood Cells Nikolett Wohner, Péter Sótonyi, Raymund Machovich et al. · Arteriosclerosis Thrombosis and Vascular Biology Open access 8 Jul 2011 140
5 Hindered dissolution of fibrin formed under mechanical stress Imre Varjú, Péter Sótonyi, Raymund Machovich et al. · Journal of Thrombosis and Haemostasis Open access 20 Jan 2011 109
All 62 most cited papers, with filters and sorting

Which keywords describe research at Nikola Vaptsarov Naval Academy?

By fractional works in 2022-now, weighted toward what it does more of than the world: Environmental Impact, Maritime Transportation, Emissions, Energy Efficiency, Shipping, Fuel Consumption, Air Quality and Ship Propulsion.

▲ more of its work than of the world's◆ about the world's share▼ less than the world's

Size is fractional works in 2022-now in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Environmental Impact30▲ 7.0×15 topics
  2. Maritime Transportation21▲ 154×2 topics
  3. Machine Learning17▲ 2.0×21 topics
  4. Climate Change16▲ 2.3×7 topics
  5. Energy Efficiency15▲ 6.6×13 topics
  6. Emissions15▲ 31×3 topics
  7. Sustainability14▲ 2.2×14 topics
  8. Shipping14▲ 110×2 topics
  9. Deep Learning12▲ 1.44×16 topics
  10. Fuel Consumption12▲ 69×2 topics
  11. Neural Networks12▲ 3.2×12 topics
  12. Air Quality12▲ 26×1 topic
  13. Ship Propulsion12▲ 205×1 topic
  14. Control Systems12▲ 26×7 topics
  15. Remote Sensing12▲ 3.8×13 topics
  16. Power Electronics11▲ 14×7 topics
  17. Risk Assessment11▲ 6.5×6 topics
  18. Artificial Intelligence10▲ 2.9×17 topics
  19. Supply Chain Management10▲ 4.5×9 topics
  20. Collision Avoidance9▲ 20×1 topic
  21. Unmanned Surface Vehicles9▲ 116×1 topic
  22. Logistics8▲ 20×6 topics
  23. Mathematical Modeling7▲ 34×3 topics
  24. Optimization7▲ 6.4×5 topics
  25. Renewable Energy Integration7▲ 8.7×3 topics
  26. Cyber-Physical Systems7▲ 11×9 topics
  27. Simulation7▲ 10×7 topics
  28. Cybersecurity6▲ 10×4 topics
  29. Student Engagement6▲ 6.3×3 topics
  30. Wavelet Transform6▲ 11×6 topics
  31. Electric Drives6▲ 64×2 topics
  32. International Law6▲ 7.5×6 topics
  33. Nanotechnology6▲ 12×2 topics
  34. Reliability6▲ 29×2 topics
  35. Fault Tolerance5▲ 13×3 topics
  36. Power Supply5▲ 134×1 topic
  37. Semiconductor Converters5▲ 134×1 topic
  38. Fatigue5▲ 16×3 topics
  39. Intelligent Transport Systems4▲ 157×2 topics
  40. COVID-19 Impact4▲ 10×2 topics

Which research topics does Nikola Vaptsarov Naval Academy publish most on?

By volume in 2022-now: Maritime Transport Emissions and Efficiency, Maritime Navigation and Safety, Electric Power Systems and Control and Engineering Diagnostics and Reliability.

Maritime Transport Emiss…12Maritime Transport Emissions and Efficiency: 12 fractional worksMaritime Navigation and Safety: 9 fractional worksElectric Power Systems and Control: 5 fractional worksEngineering Diagnostics and Reliability: 4 fractional worksCruise Tourism Development and Management: 4 fractional worksTechnical Engine Diagnostics and Monitoring: 4 fractional worksMultilevel Inverters and Converters: 4 fractional worksStonefly species taxonomy and ecology: 4 fractional worksMaritime Ports and Logistics: 4 fractional worksNetwork Security and Intrusion Detection: 3 fractional works
Environmental EngineeringOcean EngineeringElectrical and Electronic EngineeringMechanics of Materials4 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Maritime Transport Emissions and Efficiency Environmental Engineering 12 works
  2. 2 Maritime Navigation and Safety Ocean Engineering 9 works
  3. 3 Electric Power Systems and Control Electrical and Electronic Engineering 5 works
  4. 4 Engineering Diagnostics and Reliability Mechanics of Materials 4 works
  5. 5 Cruise Tourism Development and Management Transportation 4 works
  6. 6 Technical Engine Diagnostics and Monitoring Automotive Engineering 4 works
  7. 7 Multilevel Inverters and Converters Electrical and Electronic Engineering 4 works
  8. 8 Stonefly species taxonomy and ecology Ocean Engineering 4 works
  9. 9 Maritime Ports and Logistics Industrial and Manufacturing Engineering 4 works
  10. 10 Network Security and Intrusion Detection Computer Networks and Communications 3 works

How open and international is its research?

Against the world's own shares: the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available53.1%not open46.9%

World: 40% of research is openly available.

with international co-authors8.5%domestic only91.5%

World: 18% is written across borders.

How has Nikola Vaptsarov Naval Academy's research output changed?

Output in 2022-2025 was 64% higher than in 2018-2021.

still counting1990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Nikola Vaptsarov Naval Academy as a percentage of every work published that year, 0.00094% in 2024.

still counting0.0010%0.0020%Nikola Vaptsarov Naval Academy0.0016% in 202519801990200020102020

Fractional works of Nikola Vaptsarov Naval Academy over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year, against all institutions in the same year.

still counting5%10%15%all institutions10.0% in 2025Nikola Vaptsarov Naval Academy2.0% in 20252020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 10.5% in 2020.

Other research institutions in Varna

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Nikola Vaptsarov Naval Academy on Science Explorer

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