RF Safe

Children exposure to femtocell in indoor environments estimated by sparse low-rank tensor approximations

2019 · No effect · Low evidence

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No effectLow evidencePaper 1704

Using surrogate models based on sparse low-rank tensor approximations, SAR was estimated for random positions of a femtocell and an 8-year-old child in a room. For all positions, exposure values were reported as significantly below ICNIRP general public guide…

Study snapshot

Publicationmanual · 2019
Study typeexposure_assessment
Reported directionNo effect
Evidence ratingLow

Abstract

Children exposure to femtocell in indoor environments estimated by sparse low-rank tensor approximations Chiaramello E, Parazzini M, Fiocchi S, Bonato M, Ravazzani P, Wiart J. Children exposure to femtocell in indoor environments estimated by sparse low-rank tensor approximations. Annals of Telecommunications. 74(1-2):113- 121. February 2019. Abstract The exposure of an 8-year-old child to a femtocell operating at 2600 MHz, both (child and source) freely located in random positions in an indoor environment, was assessed. In order to develop surrogate models of the exposure, stochastic dosimetry based on sparse low-rank tensor approximation method (sparse LRA) was used. The surrogate models were used for fastly estimating the specific absorption rate (SAR) in all the possible positions of femtocell and child. Results showed that, for all the possible positions in the room, the exposure values were significantly below the International Commission of Non-Ionizing Radiation Protection (ICNIRP) guidelines for general public and that the probability of reaching SAR values higher than 1% of the ICNIRP guidelines value was lower than 0.006. The variation of the distance between femtocell and child influenced greatly the exposure, resulting in quartile coefficient of dispersion values always higher than 48%. link.springer.com

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeexposure_assessment
Effect directionno_effect
Population8-year-old child (modeled) in an indoor environment
Sample sizeNot supplied
ExposureRF · 2600 MHz
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Using surrogate models based on sparse low-rank tensor approximations, SAR was estimated for random positions of a femtocell and an 8-year-old child in a room. For all positions, exposure values were reported as significantly below ICNIRP general public guidelines, and the probability of SAR exceeding 1% of the ICNIRP guideline value was reported as <0.006. Distance between femtocell and child strongly influenced exposure, with quartile coefficient of dispersion always >48%.

Outcomes measured

  • Specific absorption rate (SAR)
  • Probability of exceeding 1% of ICNIRP guideline SAR value
  • Quartile coefficient of dispersion (exposure variability)

Limitations

  • Modeling/surrogate approach (stochastic dosimetry) rather than direct measurements (as described)
  • No SAR values in W/kg reported in the abstract
  • Sample size and details of the indoor environment/room characteristics not provided in the abstract
View raw extracted JSON
{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "femtocell",
    "frequency_mhz": 2600,
    "sar_wkg": null,
    "duration": null
  },
  "population": "8-year-old child (modeled) in an indoor environment",
  "sample_size": null,
  "outcomes": [
    "Specific absorption rate (SAR)",
    "Probability of exceeding 1% of ICNIRP guideline SAR value",
    "Quartile coefficient of dispersion (exposure variability)"
  ],
  "main_findings": "Using surrogate models based on sparse low-rank tensor approximations, SAR was estimated for random positions of a femtocell and an 8-year-old child in a room. For all positions, exposure values were reported as significantly below ICNIRP general public guidelines, and the probability of SAR exceeding 1% of the ICNIRP guideline value was reported as <0.006. Distance between femtocell and child strongly influenced exposure, with quartile coefficient of dispersion always >48%.",
  "effect_direction": "no_effect",
  "limitations": [
    "Modeling/surrogate approach (stochastic dosimetry) rather than direct measurements (as described)",
    "No SAR values in W/kg reported in the abstract",
    "Sample size and details of the indoor environment/room characteristics not provided in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "children",
    "femtocell",
    "indoor environment",
    "2600 MHz",
    "RF exposure",
    "specific absorption rate",
    "SAR",
    "stochastic dosimetry",
    "sparse low-rank tensor approximation",
    "ICNIRP guidelines"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.78,
      "reason": "Exposure results are explicitly compared against ICNIRP general public guidelines."
    }
  ]
}
AI can be wrong. Always verify against the paper.

AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: Not supplied
PubMed: Not supplied

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