In reference to the earlier publication (“BP” no 3/2014), which described  the problem of musculoskeletal disorders associated with work, in this article describe same recommendations regarding the prevention of these diseases in physical activity. Therefore, presents examples of simple exercise that can be taken in the workplace. Exercises have been developed for employees who work in a seated position, standing up and doing physical work dynamic.

For human, work is a source of income and satisfaction. Today, in the era of competition, unethical behavior and the rising cost of labor has also become a source of stress. The purpose of this article is to attempt to approximate the definition, symptoms, consequences and ways to cope with stress according to the old rule that prevention is better than cure.

This article presents the output of a pilot project to test a method of calculating social costs of accidents at work. The project covered 150 accidents at work in 23 companies, where the bookkeeping and alterative costs of accidents were estimated according to the severity of accidents. Moreover, survey questionnaires were used to estimate the costs of accidents borne by the injured persons and their families. Their use of medical services was analysed as well.

According to the provisions of labor law, the employer may require each employee to comply with the non-competition clause by entering into a non-competition agreement. The limits of freedom of the parties are determined in this field by labor law (mainly art. 101¹ of the Labour Code and subsequent articles), the Act on the Prohibition of Unfair Competition and the extensive case law of the Supreme Court. The employee may be bound by non-competition both during employment and after its termination. This factor is particularly important, because it determines the issue of possible payment of the contract and the manner of its termination. The non-competition agreement after termination of employment must contain contractual provisions setting out the period of the ban, the amount of compensation (if it is higher than 25% of the salary). For practical reasons, it should determine the possibility of earlier termination of the non competition-agreement.

This article presents results of research on the sound absorption coefficient for selected materials. It presents a method for testing this coefficient in the range of ultrasonic noise, which consists in measuring reverberation time on a test stand with a cubic test chamber. This article also discusses the requirements for using materials in collective protections against ultrasonic noise.