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The wear rate per unit sliding distance in the transient wear regime decreases until it has reached a constant value in the steady-state wear regime. Hence the standard wear coefficient value obtained from a volume loss versus distance curve is a function of the sliding distance.
The wear rate is affected by factors such as type of loading (e.g., impact, static, dynamic), type of motion (e.g., sliding, rolling), temperature, and lubrication, in particular by the process of deposition and wearing out of the boundary lubrication layer. [5] Depending on the tribosystem, different wear types and wear mechanisms can be observed.
Medical Code of Ethics is a document that establishes the ethical rules of behaviour of all healthcare professionals, such as registered medical practitioners, physicians, dental practitioners, psychiatrists, psychologists, defining the priorities of their professional work, showing the principles in the relations with patients, other physicians and the rest of community.
Medical ethics is an applied branch of ethics which analyzes the practice of clinical medicine and related scientific research. [1] Medical ethics is based on a set of values that professionals can refer to in the case of any confusion or conflict. These values include the respect for autonomy, non-maleficence, beneficence, and justice. [2]
Medical Ethics; or, a Code of Institutes and Precepts, Adapted to the Professional Conduct of Physicians and Surgeons is a medical book focused on public health and medical ethics. It was written by English physician Thomas Percival and published in 1803. The book is widely regarded as the first on public health and ethics in medicine. [1]
The Archard equation is a simple model used to describe sliding wear and is based on the theory of asperity contact. [1] = where: Q is the total volume of wear debris produced K is the wear coefficient W is the total normal load L is the sliding distance H is the hardness of the softest contacting surfaces
The coefficient of friction is determined by the ratio of the frictional force to the loading force on the pin. The pin on disc test has proved useful in providing a simple wear and friction test for low friction coatings such as diamond-like carbon coatings on valve train components in internal combustion engines .
The International Code of Medical Ethics [1] was adopted by the General Assembly of the World Medical Association at London in 1949, and amended in 1968, 1983, and 2006. It is a code based on the Declaration of Geneva and the main goal is to establish the ethical principles of the physicians worldwide, based on his duties in general, to his patients and to his colleagues.