Evaluation Of Elastic Modulus And Stress Gradient Of PECVD Silicon Nitride Thin Films

This study investigated the techniques for determining the elastic modulus and estimating the stress gradient of plasma-enhanced chemical vapor deposition (PECVD) silicon nitride thin films. The experimentally determined elastic modulus was then used in a finite element beam model to compute the stress distribution inside the thin films using a commercial finite element analysis package. The computed beam displacement caused by a given stress gradient was compared with the displacement experimentally evaluated using optical interference microscopy. This comparison allows the stress gradient of the PECVD silicon nitride membrane introduced by the fabrication process to be evaluated

Neopterin levels are independently associated with cardiac remodeling in patients with chronic heart failure

Neopterin, a marker of inflammation and monocyte activation, is found increased in patients with heart failure (HF). This study investigates whether neopterin levels correlate with left ventricular (LV) remodeling and brain natriuretic peptide (BNP), a marker of cardiac stress, in chronic HF (CHF) patients with different severity of disease. The relationship between elevated neopterin levels and LV enlargement in CHF patients suggests a crucial role of monocyte activation in the development of cardiac dysfunction in CHF patients. Assessment of neopterin levels is a potential biomarker to evaluate the progression of LV remodeling in CHF patients

Grid-Listening and Grid-Ringing: Alternative Concepts for Grid-Following and Grid-Forming within Power Systems Frequency Transients

The paper introduces the concepts of grid-listening and grid-ringing as alternative ways to interpret the classes of converter control commonly known as grid-following and grid-forming. The intrinsic nature of these two controls define their interaction within the frequency transients in power systems, and in particular with the disturbance propagation and the synchronization process. The grid-following interacts with the oscillations in the system just detecting them: for that, it can be regarded as grid-listening. The grid-forming interacts with the power-frequency oscillations contributing to them: for that, it can be regarded as grid-ringing. This conceptual revisiting is illustrated with a representative system, and further discussed with some examples on a benchmark power syste

‘White People All Over’: Refugee Performance, Fictional Aesthetics, and Dramaturgies of Alterity-Empathy

This article by Graça P. Corrêa and Szabolcs Musca follows the production process of Passajar, an immersive participatory theatre project collaboratively created by four theatre-makers and refugees from Congo, Iran, Iraq, Syria and Zimbabwe. Developed under the curatorship of Portuguese choreographer Madalena Victorino for Festival Todos in Lisbon, this multilingual experimental work focused on representing migrant experiences through a postdramatic artistic gaze. The production refused the forms of testimonial theatre and with it the contradictory role of facilitators, opting instead for a multidimensional fictional aesthetics practice. In this article the authors explore how Passajar performance and dramaturgical processes address difference in actual creative practice; and what are the ‘refugeedom’ aesthetics and ethical affects being generated by working with refugee participants. Similar to a growing number of non-verbatim migrant theatre initiatives, Passajar switched from the real to the fictitious via non-realistic representations and processes of abstraction. Arguably, this practice went against victimhood narratives, but does suspending traditional means of identification and empathy help develop new understandings on migration, or, on the contrary create detachment in audiences? What are the ethical consequences to audiences and refugee participants alike? Drawing upon philosophical concepts by Henri Bergson, Baruch Spinoza and Gilles Deleuze, the article examines how they critically contribute towards a discussion of the dramaturgies of alterity and empathy that were deployed in Passajar. By reflecting on both rehearsal process and final production, it reveals the ethical affects of Passajar, as well as transformative alternatives for migrant representation beyond the stage.Este artigo, da autoria de Graça P. Corrêa e Szabolcs Musca, acompanha o processo de produção de Passajar, um projeto de teatro imersivo gerado colaborativamente entre quatro criadores artísticos (teatro, dança e música) e vários refugiados do Congo, do Irão, do Iraque, da Síria e do Zimbabué. Desenvolvido sob a curadoria da coreógrafa portuguesa Madalena Victorino para o Festival Todos em Lisboa, esta produção experimental e multilingue centrou-se na apresentação de experiências dos migrantes através de uma perspectiva pós-dramática. Deste modo, a produção recusou formas de teatro de testemunho bem como o papel contraditório de facilitadores, para optar por uma prática estética ficcional e multidimensional. Neste artigo, os autores exploram as formas como a performance e processos dramatúrgicos de Passajar abordam a diferença na prática teatral; e que efeitos estéticos e éticos são gerados ao longo do trabalho criativo com refugiados. À semelhança de um número crescente de iniciativas teatrais não-documentais sobre migração, Passajar alterna entre o real e o fictício através de representações não-realistas e processos de abstração. Poderá argumentar-se que tal prática contraria as narrativas de vitimização, mas será que ao suspender os meios tradicionais de identificação e de empatia esta performance ajudou a desenvolver novos entendimentos sobre a migração ou, pelo contrário, gerou um distanciamento para com os espetadores? Quais foram as consequências éticas para o público e para os refugiados que nela participaram? Inspirado em conceitos filosóficos delineados por Henri Bergson, Baruch Spinoza e Gilles Deleuze, o artigo examina como essas contribuições críticas podem enriquecer uma discussão sobre as dramaturgias da alteridade e da empatia que foram despoletadas pela performance de Passajar. Ao refletir sobre o processo dos ensaios e a produção final, revelam-se os efeitos éticos de Passajar, assim como alternativas transformadoras para a representação dos migrantes, dentro e fora do palco.info:eu-repo/semantics/publishedVersio

Improving angle stability by switching shunt reactors in mixed overhead cable lines. An Italian 400 kV case study

Stringent environmental constraints make the construction of new transmission overhead lines more and more difficult. Alternatively, today it is possible to use cable lines for high (HV) and extra-high (EHV) voltage systems. The configuration of the so-called mixed lines can create some problems in the operation of the electrical system, both during steady-state and transient conditions. In particular, the system stability is one of the main concerns when analyzing the dynamic response of power systems. In this paper, the study of angular stability of a system containing a mixed line is presented: a specific control logic applied to the shunt reactors of the mixed line is proposed as improvement of the overall system stability. The proposed switching logic is first discussed from a theoretical point of view and validated with two different testing systems. Then, the existing overhead-cable lines connecting Sicily to the rest of continental Europe 400 kV power system are taken as case study for the application of the proposed switching strategy. Several simulations are performed in the power system analysis software NEPLAN360: the results show the fundamental role of the timing of the control actions applied on the shunt reactors in helping the system to keep the stability. The proposed control proves to be an effective support to the system subjected to critical contingencies, contributing decisively to avoid the angular separation between areas and therefore to preserve the stability of the system

Comparative study of treatment of chronic renal terminal failure in hemodialysis

Catedra Medicină Internă nr.1The purpose of this study included 35 patients aged 65 years, was to identify predictors of unfavorable renal disease, clinical features and identify complications of the patients were on hemodialysis. It is established that an adverse course of chronic renal failure in patients affected by age, sex, race, genetic factors, hypertension, diabetes mellitus, systemic diseases, infections of the genitourinary system. Among the most frequent complications were identified: Metabolic disorders (electrolyte imbalance - 60%), seredechno-vascular (pericarditis, pleurisy - 11,4%), allergic reactions (11.4%), uremic (uremic polyserositis - 14,3%). Scopul acestui studiu au fost examinarea fişelor de observaţie a 35 pacienţi cu IRC terminală trataţi prin hemodializa în secţia de nefrologie şi hemodializă a SCM ”Sfînta Treime ” în perioada anilor 2008-2010, în vîrsta de 20-65 de ani şi paralel cu studierea o serie de indici ce caracterizează tratamentul specializat în Centrul de Dializă şi Transplant Renal din cadrul IMSP Spitalul Clinic Republican. Pacienţi incluşi în studiu au fost repartizaţi în loturi conform etiologiei IRC, vîrstei, sexul, duratei tratamentului, prezenţei infecţiilor cronice hepatice virale, gradului de anemie. Este stabilit că pentru progresarea IRC în faza terminală influenţează : vârstă, sex, rasă, factori genetici, hipertensiune arterială, diabet zaharat, boli sistemice, infecţii ale sistemului genito-urinar. Printre cele mai frecvente complicaţii au fost identificate: Tulburări metabolice (dezechilibru electrolitic - 60%), vasculare (pericardită, pleurezie - 11,4%), reacţii alergice (11,4%), şi uremice (poliserozită uremică - 14,3%). Cuvinte cheie: insuficienţă renală cronică, hemodializa, complicaţii de hemodializă

Analysis and simulations of the primary frequency control during a system split in continental europe power system

The occurrence of system separations in the power system of Continental Europe has been observed in recent decades as a critical event which might cause power imbalances higher than the reference incident specified per system design, representing an actual challenge for the stability and safe operation of the system. This work presents an analysis and simulations of the primary frequency control in the Continental Europe synchronous area in conditions of system separation. The adopted approach is based on fundamental aspects of the frequency-containment reserve process. The analysis takes an actual event into consideration, which determined the separation of the system in January 2021. The main purpose of the work is the development of specific models and simulations able to reproduce the actual split event. Due to specific arrangements discussed in detail, it is possible to obtain a substantial match between the simulations and the frequencies registered after the system split. The work also provides insight into the importance of the temporal sequence of power imbalances and defensive actions in the primary frequency control process. The models developed in the work are finally used to investigate the separation event under different operating conditions, such as missing defensive actions and low inertia scenarios

Metodologia de formare şi implementare a sistemului de motivare a personalului în cadrul întreprinderii

Publicat în: Economica : Revistă ştiinţifico-didactică / Academia de Studii Economice a Moldovei ; redactor şef: Grigore Belostecinic. - Chişinău : ASEM, 2016. № 1. - P. 28-37. - Bibliogr.: p. 27 - Categoria B ISSN 1810-9136This article shows a comparison of the algorithm of staff motivation formation and the stages of staff motivation system implementation at the enterprise in modern. Own methodology of formation of personnel motivation and the main stages of system implementation at enterprises in the Republic of Moldova is offered by the author. JEL: 24, 28, 31, 33