bluuebunny/crossref_metadata_2025 huggingface dataset:
PHOTOBIOMODULATION THERAPY USED IN TREATMENT OF ORAL HEMATOMA WITH 940NM DIODE LASER – A CASE REPORT
Authors: Hari Iyer Vidyaa
Published: January 2022

Oral Hematoma generally occurs in the oral cavity due to sharp teeth by accidental biting of the cheeks, lips, tongue, oral mucosa or any soft tissues. These vascular lesions sometimes could have a feeder artery or blood vessel which could hinder the treatment protocol. Laser tissue interaction is basically dependent on the wavelength of laser used and the chromospheres within the host tissue which absorbs the laser light. Diode lasers have an affinity for blood, hemoglobin, haemosiderin and melanin predominantly as their chromophores. Hence shorter wavelength lasers such as Diode work very well in treatment of oral hematomas. Low level laser therapy or photobiomodulation works on the phenomena of light photons that are absorbed by cytochromes and porphyrins in the mitochondria of the cell thereby increasing cell respiration and transcription bringing about desired laser tissue interaction. This article highlights the use of diode lasers in the treatment of such oral hematomas. Key words: Low level laser therapy, photobiomodulation, oral haematoma, bloodless, painless, laser therapy, sutureless, laser healing, Diode laser, 940nm Diode laser, phototherapy, vascular lesions
ESTHETIC MARYLAND BRIDGE: A SHORT REPORT
Authors: Sharma Abhay , Sharma Neha , A Vinita Mary
Published: January 2022

Missing teeth in the anterior region negatively impacts the patient’s appearance and adversely affects the patient’s selfconfidence. Various treatment options such as removable partial dentures, fixed partial dentures and implants are available to rehabilitate such loss. In this case report, a zirconia based esthetic resin bonded bridge was fabricated to replace the missing right anterior tooth temporarily for a young patient till he achieves the age when he can get permanent replacement. The procedure was done with minimal tooth preparation and the outcome was esthetic with superior bonding with resin cement. KEYWORDS: Maryland Bridge, Zirconia, aesthetics, anterior fixed partial dentures, Resin bonded partial dentures
CONSERVATIVE ESTHETIC APPROACH WITH ALL CERAMIC CROWN AND PINK PORCELAIN- A CASE REPORT
Authors: Vishalini Arul , Amudhalakshmi Krishnan , Bakthavatchalam Balakrishnan
Published: January 2022

Dental traumatic injuries are uncertain and consequences following unesthetic appearance of teeth is of major concern. Esthetics, a subjective factor is necessary to formulate a treatment plan according to the patient’s needs. The condition requires minor modification of clinical protocols and achieve optimal esthetics and adhering to principles of minimal intervention. Here in this case report, we will discuss the esthetic management of a malpositioned tooth with gingival recession post trauma with an esthetic all ceramic crown with gingival porcelain. KEYWORDS: Esthetics, cosmetic recontouring, ceramic crown, pink porcelain
2,4-Dichlorophenylacrylate Copolymers as Corrosion Inhibitor for Mild Steel in 0.5M H2SO4 solution
Authors:   Department of Chemistry, Guru Nanak College,  Affiliated to University of Madras, Chennai -600 042, Tamil Nadu, India., Chitra R , Anbarasan S ,   Department of Chemistry, Thiru. A.Govindasamy Govt.Arts College,  Affiliated to Thiruvalluvar University, Tindivanum,-604307, TamilNadu, India, Kayalvizhy E ,   Department of Chemistry, PSGR Krishnammal College for Women, Coimbatore-641004, Affiliated to Bharathiar University, India., Pazhanisamy P ,   Department of Chemistry, Sir Theagaraya College, Affiliated to University of Madras, Chennai-600 021, Tamil Nadu, India.
Published: January 2022

Herein we report, the poly (NTA-2,4-Dichlorophenylacrylate) copolymers were synthesized using N-tert-amylacrylamide and 2,4-Dichlorophenyl acrylate monomers by Free-radical polymerization at 60°C. The synthesized copolymers were subjected to corrosion inhibition studies on Mild steel using 0.5M H2SO4 solution. These copolymers are showed the corrosion inhibition efficiency of 86.0%
Swelling Behavior of poly (N-cyclohexylacrylamide –co-Acrylamide/ Maleic acid) Hydrogels
Authors:   Department of Chemistry, Guru Nanak College,  Affiliated to University of Madras, Chennai -600 042, Tamil Nadu, India., Chitra R , Anbarasan S ,   Department of Chemistry, Thiru. A.Govindasamy Govt.Arts College,  Affiliated to Thiruvalluvar University, Tindivanum,-604307, TamilNadu, India, Kayalvizhy E ,   Department of Chemistry, PSGR Krishnammal College for Women,  Coimbatore-641004, Affiliated to Bharathiar University, India., Pazhanisamy P ,   Department of Chemistry, Sir Theagaraya College,  Affiliated to University of Madras, Chennai-600 021, Tamil Nadu, India.
Published: January 2022

In this study, a series of poly (N-cyclohexylacrylamide-co-Acrylamide/Maleic acid) hydrogels were prepared from free-radical copolymerization in water/methanol medium using ammonium persulfate (APS) as a free radical initiator and N,N’-methylene-bis-acryl amide(MBA) as the cross-linker at 60˚C. The synthesized hydrogels were characterized by FTIR, SEM, XRD and TGA techniques. Swelling parameters in water and dye solution were calculated. The effect of two cationic salt solutions on the swelling was studied. The hydrogels showed up to 47.9% removal efficiency towards methylene blue dye adsorption study
Effect of Ghaggar River on the underground water of Sirsa (Haryana): A Study on physicochemical parameters
Authors:   Dept. of Chemistry, Guru Kashi University, Talwandi Sabo, Punjab., Kumar Rajender , Pathak Ashutosh ,   Dept. of Chemistry, Guru Kashi University, Talwandi Sabo, Punjab., Kaur Pawanvir ,   Dept. of Chemistry, govt. National College, Sirsa., Kumar Harish ,   Dept. of Chemistry, CUH, Mahendergarh, Haryana.
Published: January 2022

Water pollution is a very serious concern nowadays because the quality of water we drink affects our health. Groundwater quality is decreasing day by day due to its excessive use in agriculture, industrial sectors, and amusement parks. Water quality parameters of groundwater need to be continuously monitored. We have analyzed sixteen water quality parameters of underground water of different regions of Sirsa district like Jhopra, Vaidwala, Begu, Mirpur, and Bajekan (sampling period June 2020 to May 2021). The sixteen physicochemical parameters like pH, conductivity, TDS, alkalinity, turbidity, heavy metals, BOD, COD, hardness, Nitrates, phosphates, sulfates, elements like Fe, Cu, Cr, Pb, Na, K, etc. were analyzed using a pH meter, conductivity meter, AAS, Flame photometer, UV-visible spectrophotometer, and turbidity meter. The water quality index was calculated for the complete year focussing on the evaluation of an average value of biological, chemical, and physical parameters. The water quality index of the geographical and socioeconomic important region i.e., Sirsa was explored by random selection of five different regions. The different physicochemical parameters were compared with WHO standards.
Effects of Minimum Quantity Lubrication Technique in Different Machining Processes - A Comprehensive Review
Authors: Wajiha Tasnim Urmi  , Md Mustafizur Rahman  , Wahaizad Safiei  , Kumaran Kadirgama  , Md Abdul Maleque
Published: January 2022

The cooling condition has a significant effect in the metal cutting industry, which has a crucial role in cooling and lubricating the workpiece-tool interface, reducing friction, and removing chips from the cutting area. Almost 15-20% of the overall machining cost was incurred from cooling and lubrication. So, the considerable cost can be occurred due to the supply, preparation, and disposal of cooling lubricants. Moreover, exposure to these substances can pollute the environment and hamper operators' health. Therefore, of late, researchers have been giving priority to investigate the effects of the Minimum Quantity Lubrication (MQL) techniques in machining as it alleviates the coolant usage by splashing fluid and compressed air mixtures. In this lubrication technique, the maximum fluid flow is less than 50ml/h, whereas flooded cooling technology uses up to 12,000 litres per hour. Most researchers found that a lower coefficient of friction, better surface finish, reduced cutting forces, and torques can be obtained using the MQL method in an optimized manner compared to dry and wet machining. Moreover, besides improving machinability characteristics, the MQL technique also complies with green and sustainable machining. Thus, a prospective solution to dry and wet processing. This paper represents the brief discussion and mechanism of the MQL technique and the effects of the MQL technique on the performance parameters of different machining processes.
Experimental of Ballast Free System with Air-Injected Pressure Bubbles in Reducing Ship Resistance
Authors: Norul Hidayah Kadir  , Adi Maimun Abdul Malik  , Arifah Ali
Published: January 2022

The discharge of ballast water may introduce and transport unwanted marine organisms to the discharging area. Marine Environment Protection Committee (MEPC) of IMO consider the action as hazard due to possibility of having negative impact on the receiving ecosystems. Many researchers have investigated possible solutions for management of ballast water to minimize the risks including the ballast free system. The concept of ballast free system is to replace the conventional ballast water management system to avoid the use of costly ballast water treatment system. However, application of ballast free system has created a new issue on ship hull resistance. The objectives of this research are to determine the effect of the system on LNG ship resistance and how the air-injected pressure bubbles affecting the ship resistance and overall system performance. To achieve the objectives, experimental tests in towing tank have been carried out at Froude number of 0.17 to 0.22 and air-injection pressure of 0.5bar, 1.0bar and 1.5bar. The application of ballast free system on the LNG ship has increased the total resistance at a range of 5% to 16%. However, air-injection to the system has reduced the total resistance by 29.8% and 8.9% in average for 0.5bar and 1.0bar injection pressure respectively. For 1.5bar injection pressure, the resistance at certain speeds is slightly increased by 1.34% in average. The optimum resistance reduction occurred at Froude number of 0.19 and 0.5bar air-injection pressure. The finding of the research can be served as a guideline for the modification of ballast tank configuration in experimental and numerical mode as a comparison to real ship conditions.
Techno-Economic Evaluations: An Innovative of Hydraulic Reaction Turbine for Pico-Hydro Generation System
Authors: Nurul Ashikin Mohd Rais  , Mohd Farriz Basar  , Shamsul Fakhar Abd Gani  , Wan Azani Mustafa
Published: January 2022

The primary goal of this paper is to evaluate an innovative Z-Blade turbine technology and its potential implications for production costs and manufacturing techniques. From literatures, conventional pico-hydro technologies with a capability of less than 5kW are getting more and more attention as good alternatives to environmentally friendly power generation, but there are more expensive and complex for small power generation and small domestic consumer level. Therefore, a Z-Blade reaction turbine technical and environmental processes as well as financial research are described in-depth. The methods for a Z-blade turbine design and implementation are described here, and also the material using for the Z-Blade turbine is a grey PVC pipe. Moreover, empirical description, designation, costing, and correlation are employed in the process of critically analysing the simple reaction water turbine novels. Also in this article, the manufacture of the Split Reaction Turbine (SRT) and Cross Pipe Turbine (CPT) was re-evaluated to take into consideration the technological and economic factors as well as the difficulties of both turbines. In the meantime, low-head, low-flow water resources used to examine additional features of Z-Blade. Theoretically, such a platform for hydro production is cost - effective and has a simplistic design methodology with a total cost of USD76 that equates to 7.6% of the overall installation cost and worthy of output up to 115W of mechanical energy.
THE MEANING OF SILENCE IN PERSONAL COMMUNICATION: SPIRAL OF SILENCE OR A STIMULANT OF CREATIVITY?
Authors: Baltezarević Radoslav Velimir , Kwiatek Piotr Benon , Baltezarević Borivoje Velimir , Baltezarević Vesna Nikola
Published: January 2022

Silence is an important part of communication. Depending on the cultural context, silence can be perceived as positive/desirable or as negative/unwelcome. This ambiguity often leads to misunderstandings with other participants in the communication process. The current study discusses the phenomenon of silence and presents the spiral of communication, as a part of nonverbal communication, and refer to the synthesis of silence and creativity. We approach important questions in our study: is silence in communication linked with creativity. If so, through what mechanism? Does the tension in communication affect silence being used as a mode of escaping from a communication process to avoid conflict, tension and uncomfortable situations? Based on the analysis of the theoretical approaches to these phenomena, we empirically test ordinary least squares mediation models based on responses collected from 416 individuals of Serbian nationality. Our study reveals that silence is used to avoid conflict in communication by reducing the feeling of tension. We note that silence does not affect creativity directly. Rather, it has a marginal effect through reducing tension and avoiding conflict and while having opposite opinions.
Spectroscopic Properties Relevant to Astronomical and Laboratory Detection of MCH and MCH+ (M = Al, Mg)
Authors: Esposito Vincent J. , Trabelsi Tarek , Francisco Joseph S.
Published: January 2022

New spectroscopic parameters have been calculated to aid in the laboratory and observational detection of AlCH, AlCH+, MgCH, MgCH+, and their deuterated analogs. All species exist in linear geometry except for AlCH+, which exhibits a bent structure. Rotational frequencies have been calculated and the transition with maximum intensity is discussed for three temperature regions present in space: 100 K for a central circumstellar envelope (CSE), 30 K for an outer CSE, and 3 K indicative of the interstellar medium. Pertinent frequencies range from 25 to 250 GHz, depending on the species. At 30 K, the most intense transition is expected to be J = 4 → 3 for all species. The vibrational spectrum of each molecule is expected to be complicated due to the flat nature of the potential energy surface along the bending angle and the presence of anharmonic resonances. Deuteration produces a decrease in vibrational frequency, which may be utilized in experiments to confirm detection of these molecules. The electronic absorption spectrum of both AlCH and MgCH is predicted to be congested and broad. Various high-oscillator-strength transitions are predicted. Upon photoexcitation in the 220–300 nm region, facile dissociation on a repulsive excited state along the Al–C coordinate is predicted to be a source of Al in the colder regions of space. Photodissociation of MgCH requires several nonradiative processes that will control the product state distribution of the fragments.
The Effects of Metallicity on Convective Overshoot Behavior in Models of δ Scuti Variable Stars
Authors: Dornan V. , Lovekin C. C.
Published: January 2022

δ Scuti variables are stars which exhibit periodic changes in their luminosity through radial and nonradial pulsations. Internally, these stars have relatively small convective cores, and convective overshoot can significantly affect the size. Recently, models of radial pulsation in δ Scuti stars found a strong correlation between the pulsation constant (Q) as a function of effective temperature and the amount of convective overshoot within the star. However, only models with metallicities of Z = 0.02 were examined, leaving the dependence of` this relationship on chemical composition unknown. In this work, we have extended the model grid to cover a range of metallicities using Modules for Experiments in Stellar Astrophysics (), and analyzed the models’ pulsation properties using GYRE. By varying the models’ mass, rotation speed, convective overshoot, and metallicity, we studied the behavior of Q at low temperature. We found that the updated convective boundary treatment in MESA changes the overshoot dependence found previously, and the value of the slope depends on both rotation and overshoot. We also found that there is a metallicity dependence in the Q values. The lowest metallicity models in our grid reached higher temperatures than previously studied, revealing a parabolic relation between

log
Q

and

log

T

eff

.
Hybrid Mapping of the Black Hole Shadow in M87
Authors: Carilli Chris L. , Thyagarajan Nithyanandan
Published: January 2022

We present a reanalysis of the Event Horizon Telescope 228 GHz observations of M87. We apply traditional hybrid mapping techniques to the publicly available network-calibrated data. We explore the impact on the final image of different starting models, including the following: a point source, a disk, an annulus, a Gaussian, and an asymmetric double Gaussian. The images converge to an extended source with a size ∼44 μas. Starting with the annulus and disk models leads to images with the lowest noise, smallest off-source artifacts, and better closure residuals. The source appears as a ring, or edge-brightened disk, with higher surface brightness in the southern half, consistent with previous results. Starting with the other models leads to a surface brightness distribution with a similar size, and an internal depression, but not as clearly ringlike. A consideration of visibility amplitudes versus UV-distance argues for a roughly circularly symmetric structure of ∼50 μas scale, with a sharp edge, based on a prominent minimum in the UV-distribution, and the amplitude of the secondary peak in the UV-plot is more consistent with an annular model than a flat disk model. With further processing, we find a possible modest extension from the ring toward the southwest, in a direction consistent with the southern limb of the jet seen on 3mm VLBI images on a factor of few larger scales. However, this extension appears along the direction of one of the principle sidelobes of the synthesized beam, and hence requires testing with better UV-coverage.
Eccentric Dust-ring Formation in Kozai–Lidov Gas Disks
Authors: Martin Rebecca G. , Lubow Stephen H.
Published: January 2022

A highly misaligned gas disk around one component of a binary star system can undergo global Kozai–Lidov (KL) oscillations for which the disk inclination and eccentricity are exchanged. With hydrodynamical simulations of a gas and dust disk we explore the effects of these oscillations on the dust density distribution. For dust that is marginally coupled to the gas (St ≈ 1), we find that the dust undergoes dynamical behavior similar to that of the gas disk but the radial distribution of dust may be very different from that of the gas. The inward radial drift of the dust is faster in an eccentric disk leading to a smaller outer dust disk radius. The dust breaks into multiple narrow eccentric rings during the highly eccentric disk phase. Eccentric dust-ring formation may have significant implications for the formation of planets in misaligned disks. We suggest that multiple dust rings may generally occur within gas disks that have sufficiently strong eccentricity peaks at intermediate radii.
Depression and Anxiety among University Students: A Comparison between COVID-19 Pandemic Panic Period and Post-panic Period in Bangladesh
Authors: Paul Gowranga , Rahman Mohammad Meshbahur , Naznin Shayla , Chowdhury Mashfiqul , Uddin Md Jamal
Published: January 2022

BACKGROUND: In Bangladesh, the rapid spread of COVID-19 virus created a panic situation among the citizen. Specially, the psycho-emotional disorder of the university students is increasing which has not been adequately investigated. AIM: Relating this, the study aimed to assess the psycho-emotional changes of the university students through investigating their level of depression and anxiety during panic and post-panic period of COVID-19 pandemic in Bangladesh. METHOD: A cross-sectional online survey was conducted among the university students in Bangladesh from April to July 2020 (panic period, n = 170) and then from August to November 2020 (post-panic period, n = 170). The Patient Health Questionnaire (PHQ)-9 and Generalized Anxiety Disorder-7 questionnaires were used to assess the depression and anxiety levels of the students, respectively. Various univariate and multivariable statistical techniques were used to analyze the data. RESULTS: The proportion of depression symptoms was 49.4% and 52.4% during the panic period and post-panic period, respectively. Anxiety symptoms were experienced by 38.2% of students during the panic period, and the percentage was nearly identical in the post-panic interval. In post-panic period, depression levels found a slight increase. Urban students reported significantly (p < 0.05) higher levels of depression and anxiety than their counterparts. Female students also exhibited significantly more anxiety symptoms (p < 0.002) than male. Depression symptoms significantly varied by family types and student’s place of residence. CONCLUSIONS: This study compared the depression and anxiety symptoms of the university students during two periods of the COVID-19 pandemic. Although the difference was small, it remains an issue for the university students in Bangladesh due to the disruption to their academic lives.
First data on the Hirudinea fauna of lotic ecosystems of the Khanty-Mansi Autonomous Area (Russia)
Authors: Fedorova Lyudmila I. , Kaygorodova Irina A.
Published: January 2022

Hirudinea, a small and ecologically important group of aquatic organisms, is poorly studied in northern Eurasia. In this study, we demyth the idea of the faunistic poverty of this region and present the first findings of rheophilic leeches from the Khanty-Mansi Autonomous Area, Russia. Investigation of 25 rivers (Severnaya Sosva, Ob, Konda-Irtysh, and Bolshoi Yugan river basins) resulted in finding 10 leech species with parasitic and non-parasitic life strategies. These species belong to two orders (Rhynchobdellida and Arhynchobdellida), three families (Glossiphoniidae, Piscicolidae, and Erpobdellidae) and six genera (Alboglossiphonia, Glossiphonia, Helobdella, Hemiclepsis, Piscicola, and Erpobdella). Five species, A. hyalina, G. verrucata, E. monostriata, E. vilnensis, and potentially new morphological species of piscine leeches Piscicola sp., have been discovered for the first time in Western Siberia. Data on species diversity of rheophilic leeches include the exact systematic position for all leech taxa. Each species from the list is supplemented with information about its geographical distribution.
Corynoneura Winnertz species from Hunan Province, Oriental China, delineated with morphological and 16S rDNA data (Diptera, Chironomidae)
Authors: Fu Yue , Fang Xiang-Liang , Wang Xin-Hua , Shen Mi , Xiao Yun-Li
Published: January 2022

The genus Corynoneura Winnertz, 1846 from Hunan Province in Oriental China is reviewed. Four new species, C. enormis Fu sp. nov., C. gibbera Fu sp. nov., C. incuria Fu sp. nov., and C. longshanensis Fu sp. nov. are described and illustrated based on adult males. Sequence data from the 16S rDNA gene were used to infer relationships between these species and complement morphological delineation. Sequences from the mitochondrial large ribosomal subunit (16S rDNA) from these species are uploaded to the National Center for Biotechnology Information (NCBI). Relationships were inferred using the Neighbor-Joining method based on 16S rDNA.
Les écoles et leur réputation
Authors: Darchy-Koechlin Brigitte , Draelants Hugues
Published: January 2022

L’image prestigieuse des plus grandes écoles françaises est fortement liée à l’histoire de ces établissements. Le passé constitue un capital symbolique hérité qu’il est essentiel de gérer et de préserver. Deux raisons nous paraissent l’expliquer : d’une part, la force de l’empreinte laissée dans l’histoire et l’imaginaire national français de certaines écoles par rapport à d’autres et, d’autre part, la lecture que les institutions font de leur passé et le sentiment plus ou moins fort d’une cohérence et d’une continuité identitaire au fil du temps. Mais, dans un contexte d’enseignement supérieur globalisé, ce capital symbolique présente un caractère ambivalent : s’il fonde le pouvoir de ces établissements, il est également susceptible d’entraver leur capacité d’innovation. À partir d’une analyse comparée des politiques d’image de quatre des plus grandes écoles françaises, l’article met en évidence que les grandes écoles ayant réussi à se saisir de ce nouveau contexte pour améliorer leur positionnement dans le champ sont celles dont le rapport à l’histoire institutionnelle est plus instrumental ou qui revendiquent une gestion plus labile de leur image au travers d’un rapport plus affranchi à leur héritage historique.
Les écoles et leur réputation
Authors: Bachiri Jilali , Ramis Gregory , Dumay Xavier
Published: January 2022

Ce chapitre analyse l’émergence d’un réseau et d’écoles à caractère islamique dans le contexte belge francophone. L’analyse d’un matériau riche fait d’entretiens et d’analyses documentaires montre que l’entrée de ces établissements dans le champ scolaire et la définition de leur identité passe largement par des processus de légitimation au sein de celui-ci, mais aussi par une différenciation de leur projet par rapport aux établissements du même « segment ». Trois grands processus de légitimation sont explorés : un processus de construction sociale du « nous » en tant que population (en minimisant les différences inter-établissements, scolaires mais aussi religieuses), un processus de traduction de la question religieuse dans le champ éducatif, qui passe non seulement par une adoption des normes du champ, mais aussi par une alliance avec les écoles du réseau confessionnel catholique, et, enfin, des processus isomorphiques des trois types (coercitif, normatif et mimétique). L’ancrage dans le marché se joue par contre en termes de différenciation par rapport aux établissements du segment, en affichant une ambition de résultats scolaires et d’excellence, là où les établissements du même segment sont souvent contraints de développer et d’afficher des ambitions scolaires plus modestes. La discussion revient sur l’intérêt d’étudier une population durant sa phase de création et d’institutionnalisation ainsi que sur l’évolution du projet institutionnel de l’école et des rapports de force à l’œuvre entre les récits dominants et alternatifs au sein d’un champ historiquement fortement institutionnalisé, mais en cours de reconfiguration.
Les écoles et leur réputation
Authors: Carrasco Alejandro , Flores Carolina , Gutiérrez Gabriel
Published: January 2022

Le système éducatif chilien se caractérise par un haut niveau de ségrégation scolaire qui s’explique notamment par un recours répandu aux pratiques d’admission sélective dans les écoles dès le primaire. L’objectif de ce chapitre est de comprendre dans quelle mesure une nouvelle législation interdisant les pratiques de sélection des écoles avant la sixième année de l’enseignement primaire a changé les pratiques effectives des écoles chiliennes. Les enquêtes menées par les auteurs montrent que la plupart des écoles primaires chiliennes continuent à utiliser les pratiques de sélection (examens d’entrée ; séances de jeu et entretiens avec les parents) malgré l’interdiction, en particulier les écoles privées, les écoles à haut niveau de performance et au recrutement socio-économique favorisé. Les pratiques d’admission sélective apparaissent aux yeux des familles comme garantes de la réputation des établissements. Les chefs d’établissement sont donc obligés d’en tenir compte pour construire leur projet scolaire. La discussion finale souligne combien la « sélectivité » apparaît ainsi comme un composant majeur d’une culture scolaire qui est elle-même le produit d’une histoire scolaire axée depuis trente-cinq ans sur le marché et la performance.
Quand Netflix fait de la diversité son meilleur argument commercial
Authors: Wiart Louis
Published: January 2022

Tant dans ses contenus que dans son management, le géant américain joue la carte de la diversité et de l’inclusion sociale. Louis Wiart analyse cette stratégie marketing : vendre les valeurs auxquelles est sensible son cœur de cible, jeune, urbain et connecté.
L’évolution des relations entre la Turquie et l’Otan : perspectives et réalités
Authors: Vallée Pierre
Published: January 2022

Les crises s’enchaînent entre la Turquie et ses partenaires de l’OTAN. En 2018, dans une tribune au New York Times , le président Erdoğan met en garde les États-Unis. « L’unilatéralisme et l’irrespect » dont fait preuve Washington contraint la Turquie à trouver « de nouveaux amis et alliés », quitte à reconsidérer son appartenance à l’Alliance. Si Ankara profite de son statut otanien, elle entend parallèlement jouir d’une liberté d’appréciation, de décision et d’action totale. Cet article tente de mesurer l’ampleur du « divorce » en cours entre l’OTAN et la Turquie, en insistant sur certains aspects qui en relativisent l’inéluctabilité.
Dialectique Guerre – Révolution une histoire de passions, d’idéologies et d’occasions manquées
Authors: Pappalardo David
Published: January 2022

Guerres et révolutions sont étroitement liées dans une interdépendance mutuelle complexe où l’idéologie, les identités et les émotions restent largement influentes. Les secondes incarnent avant tout un appel pour un nouveau départ où l’espoir et le désespoir s’entremêlent. Pour toutes ces raisons, les révolutions sont avant tout des histoires de passion, d’idéologie et d’occasions manquées qui entraînent leurs acteurs dans une spirale infernale où aucun sacrifice n’est trop lourd à payer, brouillant la frontière avec la guerre. Il ne fait aucun doute que la révolution et les guerres continueront de malmener l’architecture mondiale de sécurité. Cependant, les dirigeants politiques et militaires doivent s’efforcer d’atténuer les effets de la radicalisation en comprenant les véritables raisons qui sous-tendent les aspirations de toute révolution et en leur adressant un ensemble de réponses plus large que la seule option militaire.
The Intersections of Structural Racism and Ageism in the Time of COVID-19: A Call to Action for Gerontological Nursing Science
Authors: Robinson-Lane Sheria G. , Block Laura , Bowers Barbara J. , Cacchione Pamela Z. , Gilmore-Bykovskyi Andrea
Published: January 2022

The health consequences of systemic racism and ageism have received growing attention as the coronavirus disease 2019 pandemic has illuminated long-standing inadequacies and injustices that are structurally engrained in our health systems. The current State of the Science Commentary addresses the intersecting influences of systemic racism and ageism, and other “-isms” that conspire to create disparate health outcomes for older adults from historically excluded and marginalized backgrounds. We focus specifically on the long-term care sector as a representative microcosm of structural inequities, while recognizing that these unjust barriers to health are widespread, endemic, and pervasive. We present a call to action for gerontological nursing science to engage deeply and robustly in these realities, and the ethical and scientific imperative they present to ensure that all older adults encounter just conditions for maximizing their health and well-being. [
Research in Gerontological Nursing, 15
(1), 6–13.]
Collaboration Between Licensed Nurses and Certified Nurse Aides in the Nursing Home: A Mixed Methods Study
Authors: Beynon Cynthia , Supiano Katherine , Siegel Elena O. , Edelman Linda S. , Hart Sara E. , Madden Connie
Published: January 2022

The current mixed methods study explored how nursing team collaboration is perceived and experienced in four nursing homes (NHs) in the western United States. Licensed nurses (LNs) and certified nurse aides (CNAs) completed two survey tools to assess their perception of collaboration and team-work in their current work environment. LNs and CNAs were paired and interviewed individually and as a caregiving pair to explore the lived experience of collaboration in NH residents' care. Quantitative survey results were analyzed, and participants reported a collaborative working environment with equally strong ratings in the following categories: partnership, cooperation, and coordination; they agreed with statements reflective of teamwork, including team structure, leadership, situation monitoring, mutual support, and communication. No significant differences were found between LN and CNA responses or between team members in any of the four participating facilities. Qualitative survey data were analyzed using a thematic analysis approach. Findings revealed five primary themes, including essential elements in successful team collaboration—perspective, coworker connection, communication, mutual support, and “it makes a difference”—and ways teamwork and collaboration impact resident care. These findings provide rich insights into successful LN/CNA collaboration for academic and clinical LN and CNA educators. [
Research in Gerontological Nursing, 15
(1), 16–26.]
On the global existence and extinction behavior for a polytropic filtration equation with variable coefficients
Authors: Liu Dengming , Liu Changyu
Published: January 2022

This article is devoted to the global existence and extinction behavior of the weak solution to an inhomogeneous polytropic filtration equation. Based on the integral norm estimate approach, the conditions on the global existence and the occurrence of the extinction singularity of the weak solution are given. Moreover, we also prove the non-extinction result under some appropriate assumptions by using the weak upper and lower solutions method.
Optimal decay rates of higher–order derivatives of solutions for the compressible nematic liquid crystal flows in $ \mathbb R^3 $
Authors: Luo Zhengyan ,   School of Mathematics and Statistics, Guangxi Normal University, Guilin, Guangxi 541004, China, Ma Lintao , Zhang Yinghui
Published: January 2022

In this paper, we are concerned with optimal decay rates of higher–order derivatives of the smooth solutions to the $ 3D $ compressible nematic liquid crystal flows. The main novelty of this paper is three–fold: First, under the assumptions that the initial perturbation is small in $ H^N $–norm $ (N\geq3) $ and bounded in $ L^1 $–norm, we show that the highest–order spatial derivatives of density and velocity converge to zero at the $ L^2 $–rates is $ (1+t)^{-\frac{3}{4}-\frac{N }{2 }} $, which are the same as ones of the heat equation, and particularly faster than the $ L^2 $–rate $ (1+t)^{-\frac{1}{4}-\frac{N }{2 }} $ in [J.C. Gao, et al., J. Differential Equations, 261: 2334-2383, 2016]. Second, if the initial data satisfies some additional low frequency assumption, we also establish the lower optimal decay rates of solution as well as its all–order spatial derivatives. Therefore, our decay rates are optimal in this sense. Third, we prove that the lower bound of the time derivatives of density, velocity and macroscopic average converge to zero at the $ L^2 $–rate is $ (1+t)^{-\frac{5}{4}} $. Our method is based on low-frequency and high-frequency decomposition and energy methods.
A new order from the combination of exact coupling and the Euler scheme
Authors: Alnafisah Yousef
Published: January 2022

Davie defined a Levy variant and the combination of single random variables to ensure that the diffusion matrix did not degenerate. The use of the method proposed by Davie, which is a combination of the Euler method and the exact combination, was investigated for applying the degenerate Levy diffusion approach to $ \big(B_{ik}(Y)\big) $. We use certain degenerate conditions of diffusion which contribute to order convergence. We also show MATLAB codes to apply the integrated solution to an SDE and observe a convergence behavior. We also evaluate the agreement between the theoretical values and the MATLAB numerical example.
Fekete-Szegö and Hankel inequalities for certain class of analytic functions related to the sine function
Authors: Tang Huo ,   School of Mathematics and Computer Sciences, Chifeng University, Chifeng 024000, Inner Mongolia, China, Murugusundaramoorthy Gangadharan , Li Shu-Hai , Ma Li-Na ,   Department of Mathematics, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamilnadu, India
Published: January 2022

In this present investigation, the authors obtain Fekete-Szegö inequality for certain normalized analytic function $ f(\zeta) $ defined on the open unit disk for which

   \begin{document}$ (f'(\zeta)^{\vartheta}\left( \frac{\zeta f'(\zeta )}{f(\zeta )}\right)^{1-\vartheta} \prec 1+\sin \zeta ; \qquad (0\leq \vartheta \leq 1) $\end{document}

lies in a region starlike with respect to $ 1 $ and symmetric with respect to the real axis. As a special case of this result, the Fekete-Szegö inequality for a class of functions defined through Poisson distribution series is obtained. Further, we discuss the second Hankel inequality for functions in this new class.
Sikhs en Barcelona. Características, idiosincrasia y causalidades de la creación y establecimiento de una comunidad en el marco global de las migraciones transnacionales
Authors: Santos-Fraile Sandra
Published: January 2022

Si bien existen sikhs que habitan en diferentes lugares de España, en Barcelona se encuentra la comunidad más antigua, estable y probablemente organizada del país. El hecho de que los sikhs hayan inmigrado a España responde a razones que tienen que ver tanto con su bagaje histórico y su idiosincrasia como con fenómenos tan amplios como la globalización y los flujos globales transnacionales. Este trabajo trata de visibilizar la comunidad sikh de Barcelona -así como la existencia de otros sikhs en el Estado español- describiendo y explicando cómo y por qué vinieron hasta aquí y cuál es la forma en que se organizan y funcionan a diferencia de como lo hacen en otros lugares. Para llevar a cabo esta investigación se ha llevado a cabo trabajo de campo etnográfico durante más de 18 meses mediante etnografía multisituada en lugares como Barcelona, Londres, Delhi y el Panyab además de una importante revisión bibliográfica.
Culturizar la naturaleza, naturalizar la cultura. La construcción de las narrativas patrimoniales
Authors: Santamarina Campos Beatriz
Published: January 2022

Este artículo pretende ser una reflexión teórica en torno a los procesos de institucionalización y normalización del patrimonio cultural, inmaterial y natural. Desde nuestra perspectiva, los tres dominios patrimoniales nacen y se desarrollan en el mismo contexto sociopolítico, contando con instrumentos y agencias similares. Pero, en sus procesos de edificación y autentificación, se produce una inversión en términos discursivos muy significativa. Si en el llamado patrimonio cultural asistimos a lo que denominamos una culturización de la naturaleza, en el patrimonio inmaterial y natural presenciamos una naturalización de la cultura. Esta inversión, reflejada en prácticas y ficciones diferenciadas, nos permite indagar sobre las lógicas desplegadas por el llamado discurso patrimonial autorizado. A través de las mismas, podemos entender cómo se han ido configurando, a lo largo de los últimos dos siglos, los procesos patrimoniales. Nuestra propuesta pasa por considerar, en primer lugar, que los distintos patrimonios han actuado como instrumentos de dominación edulcorada, al confinar, codificar y asignar campos diferenciados amparados en lo disciplinario. Y, en segundo lugar, que esta disección patrimonial jerarquizada permite entender cómo se han conformado las políticas geopatrimoniales globales, a través de potentes instituciones especializadas, productoras de topografías metaculturales.
Culture humaniste et enseignement en Italie : un héritage problématique
Authors: Panzera Maria Cristina
Published: January 2022

Le traditionalisme du système éducatif italien s’explique par une multiplicité de facteurs d’ordre idéologique et politique. La réorganisation des lycées à l’intérieur de la récente réforme de l’enseignement réalisée par la ministre Gelmini (de 2008 à 2011) confirme la place importante accordée à la culture humaniste dans le pays. La comparaison avec le lycée français et la prise en compte des programmes d’évaluation internationale des élèves du secondaire (PISA) font ressortir la spécificité du système italien.
Cloaca, une machine à l’œuvre. Du corps substitué à l’œuvre productive
Authors: Joyeux Laure
Published: January 2022

L’hybridation résultant d’un processus marginal qui s’oppose à tout système de normes, les créatures hybrides homme-machine bouleversent l’ordre des espèces. La problématique de la création et de la reproduction artistique contemporaine à l’âge industriel fait apparaître la technologie comme menace et potentiel innovant tout à la fois. L’œuvre Cloaca de Wim Delvoye permettra de dégager les enjeux ainsi que la portée critique d’un tel constat.
Faut-il châtier les enfants ?
Authors: Coussemaker Sophie
Published: January 2022

L’article examine le Brevis tractatus de Rodrigo Sánchez de Arévalo (v. 1453), son insertion dans la production humaniste italienne contemporaine, sa structure et les relations intertextuelles qu’il entretient avec le De liberis educandis attribué à Plutarque, et plus particulièrement le traitement de la question de la discipline et de la violence comme méthodes pédagogiques, thème dans lequel l’auteur castillan ne semble pas reprendre les théories humanistes contemporaines.
Les Veillées : un genre éducatif universel ?
Authors: Boulerie Florence
Published: January 2022

Cette étude compare deux ouvrages de Mme de Genlis, Les Veillées du château (1784) et Les Veillées de la chaumière (1823) afin d’évaluer l’efficacité pédagogique d’un genre emprunté par l’auteure à la sociabilité mondaine. Assurant une mise en scène de la lecture, le genre des Veillées permet de diriger la réception des histoires racontées dans un cercle de famille ou de voisins tout en transmettant les valeurs conservatrices de l’Ancien régime. Pourtant, en 1823, quand elle veut éduquer le peuple, Mme de Genlis paraît avoir un projet plus progressiste : l’emploi de la forme de la Veillée pour les lecteurs des basses classes signifie-t-il que l’éducatrice procède à l’effacement des rangs ?
La querelle des philanthropinistes et néohumanistes : pratiques et débats éducatifs en Allemagne autour de 1800
Authors: Lerenard Mathilde
Published: January 2022

Les années 1800 en Allemagne sont particulièrement riches en réformes scolaires et en débats sur l’éducation. À travers ce foisonnement d’idées et de pratiques nouvelles, deux courants se distinguent à la fin du XVIIIe siècle par les objectifs qu’ils assignent à l’éducation et les modalités d’enseignement qu’ils préconisent : le philanthropinisme et le néohumanisme. Faut-il former l’homme, dans son individualité, afin qu’il développe ses facultés de manière harmonieuse, ou plutôt le citoyen, pour en faire un membre utile de la communauté ? Faut-il favoriser un enseignement formel et linguistique ou au contraire scientifique, axé sur la transmission de connaissances utiles à la vie quotidienne ? L’historiographie a jusqu’ici présenté ces deux courants pédagogiques dans une perspective chronologique, désignant le philanthropinisme comme la pédagogie de l’Aufklärung et le néohumanisme comme celle du début du XIXe siècle, de la deutsche Klassik, et dans une perspective de stricte opposition. La démarche choisie ici, visant à nuancer cette thèse, consiste à revenir sur la période charnière de 1800 et sur la querelle qui éclate entre philanthropinistes et néohumanistes en adoptant une perspective comparative. Le cas du pédagogue Friedrich Gedike et de ses établissements scolaires berlinois démontre en effet que la relation entre ces deux systèmes pédagogiques concurrents est plus complexe qu’une simple opposition symétrique et fait figure d’exemple en matière de conciliation de ces deux courants.
Une pédagogie protestante ?
Authors: Champ Nicolas
Published: January 2022

Au milieu du XIXe siècle, la confessionnalisation de l’éducation a des conséquences sur la formation des maîtres. Plusieurs écoles formant les maîtres protestants sont créées. Les principales sont celles dirigées par Louis-Frédéric François Gauthey et Adam Vulliet dans la région parisienne. Émanant de sociétés importantes du paysage religieux protestant, elles sont liées au mouvement du Réveil. Dans ces établissements, l’enseignement de la religion importe plus que les humanités. Toutefois, si, au départ, le travail des instituteurs se rapproche de celui des évangélistes, la mission civique des instituteurs est aussi soulignée.
The effect of ivermectin on non-severe and severe COVID-19 disease and gender-based difference of its effectiveness
Authors: Zubair Syed Muhammad , Chaudhry Muhammad Waleed , Zubairi Ali Bin Sarwar , Shahzad Talha , Zahid Aqusa , Khan Ibrahim Ali , Khan Javaid Ahmed , Muhammad Irfan
Published: January 2022

The COVID-19 pandemic has led to mortality and morbidity since December 2019. Many possible treatment options have been advised till date. The role of ivermectin in the treatment of COVID-19 disease remains controversial. The aim of our study was to evaluate the effect of ivermectin in hospitalized patients with non-severe and severe COVID-19 disease. We conducted a retrospective cohort study that compared outcomes in 2 groups of COVID-19 patients hospitalized at the largest tertiary care center of Pakistan. The study group was given ivermectin along with standard treatment of covid-19 disease; the comparison group was not. Data on mortality, inflammatory markers such as C-reactive protein (CRP) and ferritin, length of hospital stay and baseline characteristics were collected from Aga Khan University’s database from October 2020 till February 2021. Statistical analysis was done to determine the effectiveness of ivermectin in non-severe and severe COVID-19. Comparison of effectiveness of Ivermectin in both the genders was also conducted. The cohort included 188 patients out of which 90 were treated with ivermectin. Mortality and length of hospitalization was not found to be significantly different in the study group compared with the control group (5.6% vs 5.1%; p=0.87 and 5 days vs 4 days; p=0.27). Analysis of secondary outcomes did not yield statistically significant results, apart from ferritin levels which were significantly less in patients treated with ivermectin (547.1 vs 756.7; p=0.03). The ferritin and CRP levels in affected males were higher than in females on admission and discharge. Our findings suggest ivermectin does not significantly affect all-cause mortality, length of hospitalization and CRP levels in hospitalized COVID-19 patients. Large scale randomized controlled trials (RCTs) are required to further evaluate the role of ivermectin in covid-19 disease.