During implementation of construction projects, durations of activities are affected by various factors. Because of this, both during the planning phase of the project as well as the construction phase, managers try to estimate, or predict, the length of any delays that may occur. Such estimates allow for the ability to take appropriate action in terms of planning and management during the execution of construction works. This paper presents the use of the non-deterministic concept for describing the uncertainty of estimating works duration. The concept uses the theory of fuzzy sets. The author describes a method for fuzzy estimations of construction works duration based on the fact that uncertain data is an inherent factor in the conditions of construction projects. An example application of the method is presented. The author shows a fuzzy estimation for the duration of an activity, taking into consideration the distorting influence caused by malfunctioning construction equipment and delivery delays of construction materials.
Controlling low-temperature drying facilities which utilise nonprepared air is quite difficult, due to very large variability of ventilation air parameters - both in daily and seasonal cycles. The paper defines the concept of cumulative drying potential of ventilation air and presents experimental evidence that there is a relation between this parameter and condition of the dried matter (sewage sludge). Knowledge on current dry mass content in the dried matter (sewage sludge) provides new possibilities for controlling such systems. Experimental data analysed in the paper was collected in early 2012 during operation of a test solar drying facility in a sewage treatment plant in Błonie near Warsaw, Poland.
Introduction: The prolongation of the life of men results in the growing number of people suffering from benign prostatic hyperplasia (BPH). In 2010, BPH concerned more than 200 million men in the whole world, which at that time made up 6% of the population of men at large. Currently, the population of men in the world amounts about three billion six hundred million. The modern surgical treatment of BPH consists of minimally invasive techniques, including laser systems.
Aim: Evaluation of the eff ectiveness of photoselective vaporization of the prostate (PVP) on the basis of subjective parameters assessed by patients using IPSS and QoL questionnaires as well as objective parameters obtained from results of urodynamic tests.
Material and Methods: Between 2012 and 2015, 120 patients with benign prostatic hyperplasia were included in the study and underwent PVP. Finally, 77 patients were included in the study. In all patients, IPSS and QoL sheets were carried out 1, 6 and 12 months, and urodynamic tests 12 months after the surgical treatment.
Results: The statistically signifi cant change in the value of each parameter assessed: decrease in the IPSS, QoL, PVR, Pmax, Pop, the degree of obstruction according to Schäfer and ICS nomogram, and an increase in the values of Qmax and Qave.
Conclusions: Photoselective vaporization of the prostate is an eff ective method of therapy in patients with benign prostatic hyperplasia.
Philosophical concepts have always been closely related to the development of basic sciences. For example, great mathematical theories put forth at the turn of the century, and general theory of relativity were crucial for the advancement of physical sciences and at the same time had a great impact on the formation of a new science philosophy. They also initiated a new era of exploring the Universe, thus opening many issues in the fields of astrophysics and astronomy. In biology, the theory of evolution has greatly impacted the understanding of such fundamental issues as the origin of living species and the occurrence of the phenomenon of life on Earth. Another breakthrough in life sciences was a result of the progress in molecular biology which concerned sequencing genomes and modification of genetic resources of living organisms. These great achievements have led to formation of several new fields of life sciences such as: synthetic biology, systemic biology as well as personalized medicine.
The aim of the paper is to examine a single case of random substitution which con-sists in the replacement of liquids by glides, that is, gliding. This process occurs in both English and Polish and it affects children’s speech as well as the speech of those adults who did not acquire the proper pronunciation of liquids. We address the following questions: is the substitution really random, why in the majority of cases it results in glides and not in something else, what is the relationship between two articulatorily distant segments which allows them to participate in substitution, among many others. It is argued that some examples of gliding can be analysed as a simple reduction in the elemental make-up of segments, e.g. [] ~ [], others like English [] ~ [] can be the effect of phonetic enhancement sometimes called phonological reinterpretation.