Two new time control instruments.

A New Method for Time-Delay Compensation in Control Systems

In this paper a new method is introduced and investigated for removing the destabilizing effects of time-delay parameter in control loops. The concept of the method is taken from the knowledge concerning the dynamic behaviour of irrational transfer functions (Ir-TF), which is discussed and investigated elswhere in frequency response domain and is explained briefly here. Ir-TFs, which are we...

Exhibition of New Instruments

[New instruments, same risks].

This issue of the journal includes a publication on the adaptation of the Systematic COronary Risk Evaluation (SCORE) to estimate the risk of death from preventable diseases such as cerebrovascular disease (CVD) and coronary heart disease (CHD), among other cardiovascular diseases.1 The original system was designed to help guide clinicians responsible for the primary prevention of cardiovascula...

New anthropometric instruments.

Anthropometric examinations have been carried out since 1901 (USA) with the aim of developing and furthering the garment and footwear size system. The contribution to the solution of these problems was noticed in the last decades when a technical board was founded and the propositions in ISO norm series as well as in European norm (EN) series were prescribed. Two methods are employed in anthrop...

effects of glide path on the centering ability and preparation time of two reciprocating instruments

introduction: the aim of this in vitro study was to evaluate the effects of establishing glide path on the centering ability and preparation time of two single-file reciprocating systems in mesial root canals of mandibular molars. methods and materials: sixty extracted mandibular molars with curvatures of 25-39 degrees and separate foramina for the mesiobuccal and mesiolingual canals, were divi...