Sediment natural radioactivity and heavy metals assessment from the beaches of Ras-Gharib, Red Sea, Egypt
Bibliographic record
Abstract
Natural 238U, 232Th and 40K activity in sediment samples from beaches along Ras-Gharib coast on the Red Sea, Egypt has been estimated. Eighteen sediment samples from 3 beaches were collected and measured with Nal (Tl) gamma spectrometry. The average specific activities are 28 ±1.9, 24±2.8, and 382±21.4 Bqkg−1 for 238U, 232Th and 40K, respectively. These values are less than the worldwide average of 33, 45, and 412 Bq kg−1 recommended by UNSCEAR reports. Absorbed dose rate the annual effective dose are calculated 34 nGyh−1 and 42 µSvy−1 respectively. Eight heavy metals (Fe, Mn, Ni, Co, Zn, Cu, Pb and Cd) have been measured and analyzed by atomic absorption spectrometer (AAS). ln some samples, the concentration for the investigated heavy metals exceeds the permissible limits recommended by the Canadian Environmental Quality Guidelines. This indicated that the degree of metals pollution is caused by anthropogenic activities (Terrigenous sediments transported to the marine environment by some wadis in the General Beach area, oil spills as a result of exploration and extraction in General Company of Petroleum) and/or by natural impacts.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".