Managementul cunoașterii în instituțiile infodocumentare

Background. The concept of knowledge management has come relatively recently to the attention of Library Information Centers, offering solutions for optimizing activities and increasing institutional performance. The knowledge management helps libraries adapt to the new requirements of the Knowledge Society. Objective of the study. The aim of the study is to analyze the concepts related to knowledge management from a terminological and functional point of view, as well as to highlight the importance of implementing this phenomenon in the activity of Library Information Centers. Material and Methods. This study is a theoretical approach and is based on the review of published papers in the field of knowledge management, including librarianship. Based on the extensive literature review, the evolution over time of the notion of “knowledge” was elucidated, some conceptual aspects of knowledge management were compared, and the benefits of its implementation in libraries were identified. Results. There is no universal definition for knowledge management adopted in the research studies. The concept of knowledge management must be analyzed in a broad context. The notion of "knowledge" has been analyzed over several centuries, including in the works of ancient Greek philosophers. Effective knowledge management, through the distribution and storage of knowledge in different ways, promotes the updating and continuous development of knowledge, skills and competences, it promotes learning. The role of knowledge management in libraries is to create a work environment that promotes the creation, distribution, storage and use of knowledge. Conclusion. Recent research confirms that the implementation of knowledge management in Library Information Centers will lead to an increase in the ability of these organizations to learn, to identify and to use knowledge from internal and external sources in the processes and activities they carry out. Introducere. Conceptul de management al cunoașterii a intrat relativ recent în atenția instituțiilor infodocumentare, oferind soluții pentru optimizarea activităților și creșterea performanței instituționale. Pentru biblioteci MC reprezintă un catalizator în adaptarea la noile cerințe ale Societății Cunoașterii. Scopul lucrării. Scopul studiului constă în analiza conceptelor legate de managementul cunoașterii sub aspect terminologic și funcțional, precum și relevarea importanței implementării acestui fenomen în activitatea instituțiilor infodocumentare. Material și Metode. Prezentul studiu este o abordare teoretică și se bazează pe revizuirea lucrărilor publicate în domeniul managementului cunoașterii, inclusiv în biblioteconomie. Pe baza revizuirii extinse a literaturii, s-a elucidat evoluția în timp a noțiunii de „cunoștințe”, s-au comparat unele aspecte conceptuale ale managementului cunoașterii, s-au identificat beneficiile implementării în biblioteci. Rezultate. Din sursele studiate nu sa identificat o definiție universală pentru managementul cunoașterii. Conceptul de management al cunoașterii trebuie privit într-un context amplu. Noțiunea de „cunoștințe” a fost analizată de-a lungul mai multor secole, inclusiv în lucrările filosofilor Greciei Antice. Gestionarea eficientă a cunoștințelor, prin distribuirea și stocarea cunoștințelor în diferite moduri, promovează actualizarea și dezvoltarea continuă a cunoștințelor, aptitudinilor și competențelor, adică promovează învățarea. Rolul managementului cunoașterii în biblioteci constă în crearea unui mediu de lucru care să promoveze crearea, distribuirea, stocarea și utilizarea cunoștințelor. Concluzii. Cercetările recente au demonstrat că implementarea managementului cunoașterii în structurile infodocumentare va conduce la sporirea abilităților acestor organizații de a învăța, de a identifica și utiliza cunoașterea din surse interne și externe în procesele și activitățile pe care le desfășoară

Watching TV Series in Distance Education during the Periods of Pandemic and Martial Law

The purpose of the article is to hypothesize that the viewing of TV series by students, future creators of TV series, during the period of distance learning in conditions of restrictions and prohibitions, namely during the pandemic (2020-2021) and martial law (Russian-Ukrainian war, 2022) can become a segment of the professional educational model and one of the algorithms of crisis educational management in TV series production. The study is based on survey, comparison and content analysis methods. The target audience of the study are professional artists and media people, as well as students, i.e. future directors, screenwriters, cameramen, actors, editors, journalists, producers and advertisers. It allowed us to determine the motivation of the target audience regarding the frequency of watching TV series for the period under study, their professional interest and the choice of thematic, stylistic and genre aspects of the creation of TV series in Ukraine. The authors of the article claim that the research data represent essential empirical material that can be used in the period of distance learning as practical cases within the disciplines of the specialty for educational institutions that train specialists in "audiovisual arts and production" and "journalism", namely, future creators of TV series

Magnetic and dielectric properties of multiferroic Eu0.5Ba0.25Sr0.25TiO3 ceramics

Dielectric and magnetic properties of Eu0.5Ba0.25Sr0.25TiO3 are investigated between 10 K and 300 K in the frequency range from 10 Hz to 100 THz. A peak in permittivity revealed near 130 K and observed ferroelectric hysteresis loops prove the ferroelectric order below thistemperature. The peak in permittivity is given mainly by softening of the lowest frequency polar phonon (soft mode revealed in THz and IR spectra) that demonstrates displacive character of the phase transition. Room-temperature X-ray diffraction analysis reveals cubic structure, but the IR reflectivity spectra give evidence of a lower crystal structure, presumably tetragonal I4/mcm with tilted oxygen octahedra as it has been observed in EuTiO3. The magnetic measurements show that the antiferromagnetic order occurs below 1.8 K. Eu0.5Ba0.25Sr0.25TiO3 has three times lower coercive field than Eu0.5Ba0.5TiO3, therefore we propose this system for measurements of electric dipole moment of electron.Comment: Phase Transitions, in pres

Deficitul de fier în Sindromul Picioarelor Neliniștite Willis-Ekbom

Department of Human Physiology and Biophysics, Nicolae Testemitanu SUMPhBackground. Restless Leg Syndrome (RLS) is recognized as a neurological disorder characterized by abnormal sensations in the legs, that can cause insomnia. Its prevalence in the general population is between 5.5% and 15%, being more common in the adult population than in children. Objective of the study. To determine how RLS is related with iron and/or ferritin deficiency in serum and cerebrospinal fluid, and to review the factors associated with this deficiency. Material and Methods. Online databases of academic journals, studies and scientific articles developed and reviewed by researchers in the field were used. Results. RLS is secondarily associated with various pathological or physiological conditions related to iron deficiency (anemia, pregnancy, menopause, uremia, chronic infections), as reflected in the low serum ferritin level ( <50 mcg / L). Treatment with oral or intravenous iron improved or even resolved RLS symptoms. When the iron deficiency was only in the cerebrospinal fluid, a dysfunction of the transferrin receptors at the blood-brain barrier level was found. Dopaminergic agents, which are effective in idiopathic RLS therapy, were used for treatment. Conclusion. An increasing number of studies emphasise the importance of iron and dopamine in the treatment of secondary and idiopathic RLS. At the same time, RLS must be considered in diagnosing patients with insomnia, because it is one of the factors that can trigger and maintain it.Introducere. Sindromul Picioarelor Neliniștite (RLS), este recunoscut ca o tulburare neurologică caracterizată prin senzații anormale la nivelul picioarelor, ce provoacă insomnii. Prevalența în populația generală este de 5.5% - 15%, mai des fiind întâlnită la populația adultă decât la copii. Scopul lucrării. Determinarea în ce proporții RLS este asociat cu deficitul de fier și/sau feritină în ser și în lichidul cefalorahidian, și revizuirea factorilor asociați acestei carențe. Material și Metode. Au fost utilizate bazele de date on-line ale revistelor academice, studii și articole științifice elaborate și revizuite de cercetători în domeniu. Rezultate. RLS se manifestă secundar, în asociație cu diferite condiții patologice sau fiziologice, legate de carența de fier (anemie, sarcină, menopauză, uremie, infecții cronice), după cum a fost reflectat în nivelul scăzut de feritină serică<50 mcg/L. Tratamentul ce a inclus administrarea orală sau intravenoasă a fierului a îmbunătățit sau chiar a rezolvat și a înlăturat simptomele RLS. În cazul deficienței de fier doar în lichidul cefalorahidian, s-a constatat o disfuncție a receptorilor pentru transferină de la nivelul barierei hematoencefalice, iar pentru tratament s-au utilizat agenți dopaminergici, care sunt eficienți în terapia RLS idiopatic. Concluzii. Un număr tot mai mare de studii invocă importanța fierului și dopaminei în tratamentul RLS secundar și idiopatic. Astfel, deoarece este unul din factorii care poate declanșa și menține insomnia, RLS-ultrebuie de luat în considerație în diagnosticarea pacienților cu tulburări de somn

Infračervená spektroskopie multiferoik

Infračervená spektroskopie multiferoik Autor:Veronica Goian Ústav: Oddělení dielektrik, Fyzikální ústav AV ČR v.v.i, Na Slovance 2, 182 21, Praha 8 Abstrakt: Pomocí infračervené spektroskopie jsme studovali řadu multiferoických a magnetoelektrických látek. Náš výzkum byl často kombinován radiofrekvečními, mikrovlnnými, teraherzovými, ramanovskými a strukturními měřeními mých kolegů, jakož i magnetickými, a elastickými studiemi, na kterých jsem se podílela. Naším hlavním cílem bylo komplexní studium kvantově- paraelektrického antiferomagnetika EuTiO3 ve formě krystalů, keramik i tenkých vrstev. V objemových vzorcích EuTiO3 jsme objevili u 300 K antiferodistortivní přechod z kubické mPm3 do tetragonální I4/mcm struktury. Nízkoteplotní dielektrické vlastnosti v EuTiO3 jsme vysvětlili anomálním teplotním chováním polárních fononů. Velký a anizotropní magnetoelektrický jev, který jsme našli v EuTiO3, jsme objasnili a experimentálně potvrdili pozorováním ladění fononových frekvencí vnějším magnetickým polem. Naše studia tahově napnutých vrstev EuTiO3 odhalila u 250 K posuvný ferroelektrický fázový přechod. Naši američtí kolegové objevili pod 4.2 K feromagnetické uspořádání ve stejných tenkých vrstvách. Tím jsme experimentálně potvrdili nedávno teoreticky předpovězenou novou možnost přípravy silných...Infrared Spectroscopy of Multiferroics Author: Veronica Goian Institute: Department of Dielectrics, Institute of Physics of the Academy of Sciences, Na Slovance 2, 182 21 Prague 8 Abstract: We have investigated numerous multiferroic and magnetoelectric materials mainly using infrared (IR) spectroscopy. Nevertheless, the studies were frequently combined with radio-frequency, microwave, THz, Raman and structural measurements provided by our colleagues, as well as by magnetic and elastic investigations, where we participated. Our main aim was the complex study of quantum-paraelectric antiferromagnet EuTiO3 in the form of crystals, ceramics and thin films. Near 300 K we have discovered an antiferrodistorive phase transition from cubic mPm3 to tetragonal I4/mcm structure in bulk EuTiO3 and explained its low-frequency dielectric properties by anomalous polar phonon behavior. Large and anisotropic magnetodielectric effect, which we found in EuTiO3, was successfully explained and experimentally confirmed by observation of tuning of phonon frequency with magnetic field. Our IR studies of tensile strained EuTiO3 thin films revealed a displacive ferroelectric phase transition near 250 K. Our American colleagues revealed the ferromagnetic order below 4.2 K in the same strained EuTiO3 thin film. In such way we have...Matematicko-fyzikální fakultaFaculty of Mathematics and Physic

Spin and lattice excitations of a BiFeO3 thin film and ceramics

We present a comprehensive study of polar and magnetic excitations in BiFeO3 ceramics and a thin film epitaxially grown on an orthorhombic (110) TbScO3 substrate. Infrared reflectivity spectroscopy was performed at temperatures from 5 to 900 K for the ceramics and below room temperature for the thin film. All 13 polar phonons allowed by the factor-group analysis were observed in theceramic samples. The thin-film spectra revealed 12 phonon modes only and an additional weak excitation, probably of spin origin. On heating towards the ferroelectric phase transition near 1100 K, some phonons soften, leading to an increase in the static permittivity. In the ceramics, terahertz transmission spectra show five low-energy magnetic excitations including two which were not previously known to be infrared active; at 5 K, their frequencies are 53 and 56 cm-1. Heating induces softening of all magnetic modes. At a temperature of 5 K, applying an external magnetic field of up to 7 T irreversibly alters the intensities of some of these modes. The frequencies of the observed spin excitations provide support for the recently developed complex model of magnetic interactions in BiFeO3 (R.S. Fishman, Phys. Rev. B 87, 224419 (2013)). The simultaneous infrared and Raman activity of the spin excitations is consistent with their assignment to electromagnons