Society and Security

The study emphasizes the most important theories in the field of security studies and is concerned with the threats directed at the supportive elements of human communities which are less visible than the traditional ones. They are accompanied by a force that conquers mental spaces and changes the individual's self-awareness, namely that of the social will. This study discusses the societal security of the social will on a historical time axis, beginning with the 12th century (when social authority, temporal power, is separated from the authority of the Church, from spiritual power), followed by a second historical moment of the deconstruction of social frames, which occurred in the 19th century (that of the romantic culture, as reaction to the rationalist individualist trend), and by the year 1989, a third moment of rupture analyzed in comparison with the others

Despre influenţa fenomenelor reologice asupra compactării în timp a argilelor sarmaţiene din Republica Moldova

Resursă electronicăSunt prezentate rezultatele urmăririlor geodezice de mai mulţi ani a desfăşurării în timp a tasărilor coşului de fum al Centralei Electrice cu Termoficare (CET) № 1 din oraşul Chişinău. Pe baza datelor obţinute în natură se confirmă noile principii recomandate de N. N. Maslov şi L.B.Lâong în vederea precizării teoriei consolidării elaborate de T. Terzaghi şi N. M. Ghersevanov

Determinarea rezistenţei şi verificarea stabilităţii terenului de fundare: Indicaţii metodice

Fişierul ataşat conţine: Prefață, Cuprins, Bibliografie. Textul integral al publicației poate fi accesat pe site-ul http://library.utm.md. Accesul prin logare este valabil pentru studenţi, masteranzi, doctoranzi şi cadre didactice UTM.Lucrarea de faţă tratează noţiunile generale despre starea de tensiune în interiorul masei de pământ, determinarea rezistenţei terenului de fundare, gradul de stabilitate a taluzurilor şi versantelor. Sunt analizate diferite probleme complicate sau mai puţin complicate care pot fi folosite în cadrul lecţiilor practice, la elaborarea lucrărilor de an şi licenţă, la studierea individuală, precum şi pentru evaluarea curentă sau sumativă a studenţilor. Lucrarea este utilă studenţilor facultăţilor de construcţii şi secţiei de construcţii miniere ca suport de curs

A novel non-destructive technique for qualitative and quantitative measurement of dental erosion in its entirety by porosity and bulk tissue-loss

Objective To explore the potential of combining non-contact profilometry (NCP) and confocal laser scanning microscopy (CLSM) data to measure the entire erosive process non-destructively and to validate findings using inductively coupled plasma-atomic emission spectroscopy (ICP-AES), scanning electron microscopy (SEM) and surface microhardness (SMH) using the same samples throughout. Methods Polished bovine enamel samples (n = 35) were divided into groups (7/group) with similar SMH values. Samples underwent individual erosive challenges (1 % citric acid, pH3.8) for 1, 5, 10, 15 or 30 min under stirring and aliquot extracts were analysed for Ca and P by ICP-AES. SMH was used to measure erosive softening. Profilometry was used to assess bulk volume loss (BVL). Images were captured by SEM. Samples were stained with rhodamine-B (0.1 mM, 24 h) and images captured by CLSM. Image processing was used to determine changes in fluorescent volume for the first 10 μm (ΔFV10) for each enamel sample which were combined with BVL to calculate total lesion volume (TLV). ANOVA, linear regression and Pearson correlation analysis were used where applicable. Results Surface softening, [Ca], [P], BVL and ΔFV10μm increased with acid erosion duration which were significant by 10 min (P < .01). The Ca:P ratio increased to 1.57 then decreased after 5 min erosion suggesting a sub/surface phase change, which was observed by SEM and CLSM showing significant changes to the enamel surface and subsurface morphology with time. Combination of BVL and ΔFV10 as TLV strengthened the significant correlations with [Ca], [P], and SMH (P < .01). Conclusion This novel combination of CLSM and NCP allows for concurrent non-destructive quantification of the entire erosive process by mineral loss, and qualitatively characterise microstructural changes during dental erosion

Caries Risk software – a new tool used for children caries risk assessment

Introduction. Dental caries risk is a key factor which may influence dental health in the near future. It is a very important factor for developing individual or community preventive strategies. Material and method. 46 dental records were analyzed including data of caries baseline and caries risk factors in a group of 46 schoolchildren from city of Bucharest. The overall caries risk was estimated using version 1.0 of Caries Risk software, the first software designed and calibrated to provide caries risk for Romanian patients. Results. The caries risk was approximately 40% in our sample. The girls had a higher risk by about 13% compared to boys. Conclusions. Caries Risk software is an effective tool for estimating caries risk by having an easy mode for input data and a short time needed for processing.</jats:p

Simulation of Electromechanical Actuators Using the Finite Integration Technique

The coupling methods allow the use of two independent meshes for mobile and fixed armature within the simulation of an electrical machine. The technique is applicable when the air gap is cylindrical or planar for a rotational or translational device respectively. Hence, the modeling of the movement of particular magnetic relays or plungers is not possible with this technique. Although both meshes are independent, it is recommended that big differences in the grid resolution are avoided. This ensures that the interpolation error is acceptable and also that the FIT stiffness matrix structure is not significantly altered. The coupling by trigonometric interpolation leads to more accurate results than computed to the coupling by linear interpolation, but requires also substantially more computational time. The force calculation is carried out at a surface in the middle of the air gap. The accuracy of the field values is improved by computing local analytical solutions relaying upon FFTs. The more accurate field values leads to better results for the forces. The simulation of electromechanical system with body motion is possible, and mechanical and electromagnetical damping effect can be considered. The coupling techniques allow to calculate cylindrical and linear machines