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Researcher · Namibia University of Science and Technology · Namibia

Sylvanus Ameh Onjefu

Sylvanus Ameh Onjefu publishes mostly in Radiological and Ultrasound Technology, Safety, Risk, Reliability and Quality and Materials Chemistry, on topics such as Radioactivity and Radon Measurements, Nuclear and radioactivity studies and Heavy metals in environment.

ORCID 0000-0002-2340-6906 OpenAlex
World rank
#4,552,649
of 7,710,434 ranked researchers
Rank in Namibia
#231
of 381
Works
24
Citations
235
Citations per work
9.8
h-index
8
i10-index 7Top 60% in Radiological and Ultrasound Technology
Sylvanus Ameh Onjefu

What does Sylvanus Ameh Onjefu research?

Sylvanus Ameh Onjefu's work is mostly in Health Professions (29%), Environmental Science (19%), Engineering (12%).

Physical Sciences: 11 works · 44.8% of their workEnvironmental Science: 5 works · 18.8% of their workPollution: 2 works · 10.1% of their workGlobal and Planetary Change: 2 works · 8.7% of their workEngineering: 3 works · 11.6% of their workSafety, Risk, Reliability and Quality: 3 works · 11.6% of their workMaterials Science: 2 works · 10.1% of their workMaterials Chemistry: 2 works · 10.1% of their workComputer Science: 1 works · 4.3% of their workArtificial Intelligence: 1 works · 4.3% of their workHealth Sciences: 7 works · 29.0% of their workHealth Professions: 7 works · 29.0% of their workRadiological and Ultrasound Technology: 7 works · 29.0% of their workEverything else: 6 works · 26.2% of their workTHEIR WORKSylvanus AmehOnjefu24works
Physical Sciences45%Health Sciences29%

Their six largest subfields, inside their fields and domains; the grey slice is everything else they publish. The interactive view splits every one of their works down to single topics.

The fields and subfields, with their numbers
    1. Environmental Science518.8%
    2. Engineering311.6%
    3. Materials Science210.1%
    4. Computer Science14.3%
    1. Health Professions729.0%
  3. Everything else626.2%
  1. 1Radiological and Ultrasound Technology29% of their works
  2. 2Safety, Risk, Reliability and Quality12% of their works
  3. 3Materials Chemistry10% of their works
  4. 4Pollution10% of their works
  5. 5Global and Planetary Change9% of their works
  6. 6Artificial Intelligence4% of their works

Research topics

Which keywords describe Sylvanus Ameh Onjefu's research?

The keywords of their largest research topics: Toxicity, Health Effects, Radionuclides, Ionizing Radiation, Radon, Nuclear Fuel, Radiation Protection and Contamination.

Size is their works in the topics tagged with each word, from their 8 largest topics. Each links to the topic it comes from most.

All 19 words, with their numbers
  1. Toxicity272 topics
  2. Health Effects262 topics
  3. Radionuclides262 topics
  4. Ionizing Radiation201 topic
  5. Radon201 topic
  6. Nuclear Fuel81 topic
  7. Radiation Protection81 topic
  8. Contamination71 topic
  9. Heavy Metals71 topic
  10. Fukushima Daiichi61 topic
  11. Nuclear Graphite61 topic
  12. Oxidation Behavior61 topic
  13. nuclear accident61 topic
  14. Environmental Impact Assessment31 topic
  15. Machine Learning31 topic
  16. Mineral Prospectivity31 topic
  17. Sustainability Assessment31 topic
  18. Lichen21 topic
  19. Symbiosis21 topic

Where does Sylvanus Ameh Onjefu work?

Sylvanus Ameh Onjefu's main affiliation in the publication record is Namibia University of Science and Technology, Namibia.

How many publications and citations does Sylvanus Ameh Onjefu have?

OpenAlex counts 24 works and 235 citations for Sylvanus Ameh Onjefu, an h-index of 8, ranking #4,552,649 of 7,710,434 researchers worldwide on the quality score.

Ranked on field-normalised excellence (50%), output (30%) and citations (20%). Counts come from OpenAlex author records, which occasionally merge different people who share a name or split one person into several.

Papers, co-authors, who cited this work and researchers on the nearest topics have tabs of their own, above. Is this your page? Claim it with your ORCID iD, or request a correction or removal.

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