Dynamic Identification for Representative Building Typologies: Three Case Studies from Bucharest Area

The paper presents results from an experimental program implemented for three representative buildings in Bucharest metropolitan area and aimed to explore the potential of various dynamic identification methods in providing information about building state changes. The objective is to establish reference values of potential use in rapid earthquake damage detection systems. Each of the selected buildings was designed according to a different seismic code, in force at the time of its construction. The methods employed for this study were: the analysis of Fourier spectra, the analysis of the transfer function and the random decrement technique. To validate the results, the fundamental periods of vibration determined experimentally were compared with the corresponding values predicted by the empirical formulas specified in the corresponding editions of the Romanian seismic code. The results revealed consistent values for both the fundamental period and the damping ratio of the buildings. However, small variations of the two parameters were identified, depending on the time the recordings were performed, noise sources and levels and building occupancy. The results, in terms of validated data on the dynamic characteristics of Romanian building stock and of assessment of methods performance, add up to the information pool needed for the development of countrywide pre- and post-earthquake assisted decision tools

Multicomponent Alloys for Biomedical Applications

Titanium alloys are considered to be the most advanced materials for orthopedic implants due to the favorable combination of mechanical properties, low density, tissue tolerance, high strength-to-weight ratio, good resistance to corrosion by body fluids, biocompatibility, low density, nonmagnetic properties, and the ability to join with the bone. This is the reason why we decided to assess the resistance of two titanium alloys currently used for orthopedic implants, namely, Ti6Al7Nb and Ti6Al4V, as reference, to cyclic fatigue by dynamic tests with crevice corrosion stimulation. According to the results obtained, the examined electrochemical quantities, the visual and SEM observations, and EDX analysis reveal better corrosion behavior of the prostheses made of Ti6Al4V—anodized series compared to prostheses made of Ti6Al7Nb. The further comparison of two explanted proximal modules, made of Ti6Al7Nb and Ti6Al4V, to the same type of prostheses evaluated by cyclic fatigue dynamic tests with crevice corrosion stimulation reveals that there are significant similarities, in particular with regard to the electrolyte diffusion, deposition of products and corrosion. Cation extraction tests which were carried out for Ti6Al7Nb prostheses that have undergone particular surface treatments show significant differences depending on the surface treatment and demonstrate that orthopedic implant materials are not “inert.

RESEARCHES ON SOME BIOLOGICAL AND ECOLOGICAL CHARACTERISTICS OF SWEET CORN

Sweet corn is a stenotermal plant that endures limited temperature variations requiring also adequate levels of humidity. Many farmers assume some risks in this direction, but they can sometimes compromise a significant percentage of culture. So many times to reach the phrase "first on market gets high-prices" is to resort to sowing too early and not to purchase early hybrids. Objective of this paper was to elucidate some aspects regarding behavior of certain hybrids of sweet corn with regard to certain attributes of production under Transylvanian Plateau conditions. Also, for growing surfaces cultivated with sweet corn, the biological material was also analyzed in terms of adaptability to mechanized harvesting. Delicios hybrid is distinguished by the lowest values of the coefficient of variation in the two years, indicating a good uniformity of cob insertion and the possibility of mechanized harvesting

Measurement of the forward Z boson production cross-section in pp collisions at s=13\sqrt{s} = 13 TeV

A measurement of the production cross-section of Z bosons in pp collisions at $\sqrt{s} = 13$ TeV is presented using dimuon and dielectron final states in LHCb data. The cross-section is measured for leptons with pseudorapidities in the range $2.0 \eta 4.5$, transverse momenta $p_\text{T} 20$ GeV and dilepton invariant mass in the range $60 m(\ell\ell) 120$ GeV. The integrated cross-section from averaging the two final states is \begin{equation*}\sigma_{\text{Z}}^{\ell\ell} = 194.3 \pm 0.9 \pm 3.3 \pm 7.6\text{ pb,}\end{equation*} where the first uncertainty is statistical, the second is due to systematic effects, and the third is due to the luminosity determination. In addition, differential cross-sections are measured as functions of the Z boson rapidity, transverse momentum and the angular variable $\phi^*_\eta$

Структура летальности от рецидива туберкулеза легких

From the existent data about the mortality through recedived pulmonary tuberculosis there were analyzed specific particularities of these in 2015-2017. So, the mortality through tuberculosis recidived and its complications constitution 1,26%000 in 2015, 1,38%ооо in 2016 and 1,42%000 in 2017. The mortality determined by the respiratory localization of the tuberculosis is much bigger (99,6%) than the one determined by the extrarespiratory localization of the disease (0,4%). The majority of the deaths through tuberculosis are produced in the period of 31-65 years (87,2%). The peak of the mortality curbe at men is the situated at the group of people at the age of 51-65 years and at women — at the group of people at the age of 41-65 yearsDin datele existente privind mortalitatea prin tuberculoza pulmonară recidivată s-au analizat anumite particularităţi ale acesteia în perioada 2015-2017. Astfel, mortalitatea prin tuberculoza recidivată şi complicaţiile ei, a constituit 1,26%000 în 2015, 1,38%000 în 2016 şi 1,42%000 în 2017. Mortalitatea determinată de localizarea respiratorie a tuberculozei este mult mai înaltă (99,6%) decât cea cauzată de localizările extrarespiratorii ale bolii (0,4%). Majoritatea deceselor prin tuberculoza recidivată se produc în perioada de vârstă de 31-65 de ani (87,2%). Nivelul cel mai înalt al letalităţii la bărbaţi, cât şi la femei s-a înregistrat la grupa de vârstă de 41-65 de aniИсходя из имеющихся данных о смертности от рецидивирующего туберкулеза легких, были проанализированы отдельные его особенности в период 2015-2017 гг. Так, смертность от рецидива туберкулеза и его осложнений составила 1,26%000 в 2015 г., 1,38%000в 2016 г. и 1,42%000 в 2017 г. Смертность, обусловленная респираторной локализацией туберкулеза, намного выше (99,6%), чем смертность от туберкулеза. экстрареспираторные локализации заболевания (0,4%). Большинство случаев смерти от рецидивирующего туберкулеза происходит в возрасте от 31 до 65 лет (87,2%). Самый высокий уровень летальности как у мужчин, так и у женщин был зафиксирован в возрастной группе 41-65 ле

Eficacitatea tratamentului în cadrul strategiei dots

Au fost analizate rezultatele tratamentului DOTS (2002-2003) la 2278 de pacienţi. S-a obţinut conversia sputei la cazurile noi - 74,6% şi 77,5%; la recidive - 62,5% şi 59,1%; la eşec terapeutic -57,1% şi 53,8%. Au abandonat tratamentul 17,2% şi 12,8% de pacienţi cazuri noi; 29,8% şi 36,4%- recidive; 22,9% şi 26,2% cu eşec terapeutic. Rata succesului tratamentului pentru cazurile noi a fost de 64,0% şi 67,2%

Les droits disciplinaires des fonctions publiques : « unification », « harmonisation » ou « distanciation ». A propos de la loi du 26 avril 2016 relative à la déontologie et aux droits et obligations des fonctionnaires

The production of tt‾ , W+bb‾ and W+cc‾ is studied in the forward region of proton–proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98±0.02 fb−1 . The W bosons are reconstructed in the decays W→ℓν , where ℓ denotes muon or electron, while the b and c quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions.The production of $t\overline{t}$, $W+b\overline{b}$ and $W+c\overline{c}$ is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 $\pm$ 0.02 \mbox{fb}^{-1}. The $W$ bosons are reconstructed in the decays $W\rightarrow\ell\nu$, where $\ell$ denotes muon or electron, while the $b$ and $c$ quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions

Eficacitatea tratamentului în cadrul strategiei DOTS în municipiul Chişinău

Au fost analizate rezultatele tratamentului DOTS (2002-2003- 2004) la 3637 de pacienţi. S-a obţinut conversia sputei la cazurile noi - 74,6%, 77,5% şi 62,5%; la recidive - 62,5%, 59,1% şi 61,1%; la eşec terapeutic - 57,1%, 53,8% şi 56,2. Au abandonat tratamentul 17,2%, 12,8% şi 13,9% de pacienţi cazuri noi; 29,8%, 36,4% şi 31,3% - recidive; 22,9%, 26,2% şi 33,3% cu eşec terapeutic. Rata succesului tratamentului pentru cazurile noi a fost de 64,0%, 67,2% şi 61,1%

Exploring the long-term balance between radon mitigation systems and human behaviour in Romanian houses

Radon is a naturally occurring radioactive gas that has high carcinogenic potential and may constitute a significant public health problem. The long-term effectiveness of radon mitigation systems is often assumed, yet rarely questioned beyond initial implementation. This study investigates the long-term performance of mitigation systems after installation, based on continuous monitoring conducted over several years. Ten Romanian dwellings served as case studies illustrating the interaction between technical remediation measures and various patterns of occupant behaviour. The remediation methods included sub-slab depressurization (SSD), heat recovery ventilation, both centralized (CHRV) and decentralized (DHRV), and the use of radon barriers. The results showed a variable efficiency of the remediation methods, with average radon concentration reduction values ranging from -8 % to 91 %, and an overall median of 59 %. The SSD-based remediation methods demonstrated superior performance and better stability over time, recording an average efficiency of 86 %, while the CHRV and DHRV systems showed much higher variability and a decline in efficiency over time. One of the most critical factors contributing to the success of the remediation was user behaviour, with intermittent use, disconnecting of systems, or lack of maintenance leading to increases in post-remediation radon concentration, in some cases even above pre-remediation levels. In contrast, the active involvement of the occupants, including constant monitoring and prompt reaction to malfunctions, ensured that low radon levels (below 50 Bq/m3) were maintained. The findings suggest that maintaining low radon levels over time requires more than just technical interventions, highlighting the importance of a balanced interaction between automated systems and occupant engagement. These results highlight the need for public policies that combine engineering solutions with behavioural, educational, and ongoing support strategies to maintain the effectiveness of residential radon safeguards