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  • Author: Carmen Popa x
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Abstract

The descriptive geometry constitues the foundation of the engineering sciences, so necessary to the specialists of this field. The aim of this paper is to establish the intersection curve between two cylinders and their unfoldings, by using the programmes:AutoCAD and Mathematica. We used the classical method and we first establish the intersection curve and then the cylinders unfoldings. To do this, we used the AutoCAD program. The same unfoldings can be obtained by introducing directly the curve equations (which are inferred) in Mathematica program.

Abstract

In this paper the deformation state of a circular and isotropic plate is analyzed, using as methods of comparison the analytical, the finite element and the experimental element methods. In the finite element method, the plate is analyzed by several programmes, as well as assembled with the respective container.

Abstract

The purpose of this paper is to establish the intersection curves between cylinders, using Mathematica program. The equations curves which are inferred by mathematical methods are introduced in this program. This paper takes into discussion the case of four cylinders.

Abstract

It is obvious that all the elements in a metallic prosthesis implanted in the human body may have beneficial or detrimental effects on the tissue-prosthesis interference. For this reason, the precise knowledge of the chemical composition and structure of an implantable metallic material becomes a major requirement for estimating the medical prosthesis behavior and minimizing the risk of rejection of the implant by the human body. This paper presents an elemental and structural analysis of some potentially biocompatible materials, such as AISI 316 and Co-Cr-Mo alloys.

Abstract

The paper proposes to establish the intersection curve and the unfoldings of three cylinders. The intersection of the curves was determined by the classical method, using the AutoCAD program, and the unfolded surfaces were realized by analytical methods. For this the Mathematica program was used.

Abstract

Domestic violence is a widespread public health problem. Domestic violence does not just manifest itself physically, it can take different forms, from verbal aggression to insults of psychological, emotional, sexual, material deprivation or simply negligence. All these affect the victim in many ways. Thus, the professionals in medical, legal sciences, but also the state authorities with responsibilities in social protection and assistance must know the phenomenon very well and find the best ways to fight it. No institution will be able to achieve this objective by working individually, but only an efficient cooperation of all these factors can contribute to limiting the negative effects and the state of vulnerability, but also to provide information and support to the victims.

Abstract

Starting of the characteristic expressions of some breaking polynomial criteria, known and used in practice, it is highlighted how to assess the safety coefficients used in some practical cases. It is obvious that the decision belongs to the user given the experience in the adequate technical domain. In this regard it must not neglect the fact in that the breakage is produced most often in unpredictable moments, conditioned by multiple factors, dependent on material, on manufacturing technologies of finished products, respective the operating conditions.

Abstract

In a nanobiotechnology world with many applications in biomedicine, a novel combination of inorganic-organic materials is needed to prove a novel functionality. Natural compounds from bee pollen extract coated on magnetite nanoparticles could open up a new way in apitherapy field. Iron oxide nanoparticles have proved special requirements for biological applications like superparamagnetic properties, high biocompatibility and nontoxic material. Magnetite nanoparticles functionalized with natural bioactive substances extracted from bee pollen have been characterised and investigated for antimicrobial activity. Previous findings demonstrate that magnetite nanoparticles (MNPs) and pollen ethanolic extracts (PEE) exhibited antimicrobial activity against a large antimicrobial spectrum, including Grampositive, Gram-negative and antifungal microorganisms.

Abstract

Introduction: The assessment of the Doppler velocimetric indices of the uterine, umbilical and middle cerebral artery helps in diagnosing and monitoring pregnancies with fetal growth disorder.

Material and method: Two groups were studied: the 1st group SGA (small for gestational age) including 22 fetuses whose birth weight was below the 10th percentile for gestational age and the 2nd group AGA (appropriate for gestational age) comprising 58 fetuses whose birth weight was between the 10th and 90th percentile. According to Doppler changes we could identify fetuses with intra uterine growth restriction (IUGR) and perform a comparative analysis of Doppler changes according to frequency and also assessed the predictive accuracy of some abnormal velocimetric indices for diagnosing SGA.

Results: In the SGA group we found 8 fetuses with IUGR (36.3%), based on the fetal brain-sparing phenomenon indicated by Doppler changes. In the AGA group Doppler changes were observed in only 1 pregnancy (1.7%). The frequency of Doppler changes was significantly higher in the SGA group. The highest predictive accuracy for SGA was found for a cerebroplacental ratio (CPR) below 1.08 (88.89% PPV; 80.28% NPV; 36.36% Se and 98.28% Sp) with p < 0.0001.

Conclusions: Many cases of IUGR occur in pregnancies without evident risk factors as shown in this study. The most effective parameter for diagnosing SGA was found to be the CPR below 1.08.

Abstract

Patients recently diagnosed with diabetes mellitus need to go to a complex evaluation regarding not only glycaemia and HbA1C, but also blood pressure values, lipid metabolism, kidney function, medical history and lifestyle choices. Cardiovascular risk assessment can reveal which patients fall into moderate and high categories of risk, where regular follow-up and intensive therapy addressing all the risk factors must be strictly performed. We selected a group made of 385 diabetes mellitus type II patients, a representative for the whole population of newly diagnosed diabetic patients from our county in 2017. We determined their anthropometric indicators, their biochemical parameters, their lifestyle choices and we assessed their coronary heart disease risk at 10 years using UKPDS risk engine.