some machine learning algorithms for sex identification based on linear mandibular measurements derived from CT scans .

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Purpose of the study is to investigate food consumption in young people and the contribution of food to heavy metal pollution. Methods: The object of the study are 60 healthy young people aged 19-29 years (average age – 23,9 ± 2,6) from Pleven and the Pleven district. Assessment of food intake was made according to A two-day, 24-hour diet recall method and Food Frequency Questionnaire (FFQ) method. A documentary method was used to assess the content of heavy metals- data provided by the Food Chain Risk Assessment Centre Data provided by the Food Chain Risk Assessment Centre. 2,471 food samples were analyzed for lead and cadmium over a 7-year period. Result: The food group importing complex carbohydrates could have a probable contribution to the dietary exposure to Pb and Cd, as they are consumed in the recommended amounts, although no content of lead and cadmium above the maximum permissible amounts was found in the studied foods. Intake of vegetables and fruits is significantly below recommended - vegetables and fruits would likely contribute to dietary exposure to Pb and Cd provided they were consumed as recommended. The average daily intake of dairy products is compared to the references. Game meat and offal could contribute to dietary exposure to both heavy metals, but these were also not consumed by the respondents. Fish and seafood likely contribute to dietary exposure to heavy metals, but their consumption is low and significantly below recommendations. Conclusion: The obtained results confirm the importance of a healthy food model for the protection of human health, including protection from chemical hazards in food.

The production of eggs and poultry is an important sub-sector of the food industry in Bulgaria. It is characterized by longstanding traditions and significant development prospects. Technological processes include a number of operations related to poultry farming and the production of poultry meat and eggs. Unfavorable factors of production leading to damage to the health of workers are microclimate, forced labor, monotonous work with repetitive working movements, noise, vibration, poisons and dust. Leaders in the incidence of occupational diseases are peripheral nervous system, bonemuscle, respiratory and digestive systems injuries. Necessary and possible are a number of measures to improve working conditions and prevent occupational accidents and diseases.

Mechanical engineering is traditionally well developed in Northern Bulgaria. With the development of production and technical progress, some health problems for workers appear. The aim of this study was to examine the damage of the peripheral nervous system in workers in mechanical engineering and to propose measures for the prevention of accidents and occupational diseases. Subjects of the study are 65 persons employed in mechanical engineering. Conclusions are made and recommendations given for improvement of the work conditions and organization of the work.