L’action Apple, une opportunité de suivi de tendance: Zoom sur les ratios financiers et l’évolution boursière de 2019 à 2023

This article aims to evaluate the performance and profitability of Apple Stock, as well as its trend following strategy, based on different financial ratios, over a period of five years, from 2019 to 2023. For this, it relies on the concept of trend following, a trading strategy that consists of following the direction of the market, without trying to anticipate changes. After a presentation of the literature review on the subject, we will present  Indicators and tools to monitor a trend, then we will analyze the financial data of Apple, and its stock market behavior, over a period of five years. We will conclude our article by giving recommendations on whether or not to invest in Apple stock.Cet article vise à évaluer la performance et la rentabilité de l´action Apple, ainsi que sa stratégie du suivi de tendance, à partir de différents ratios financiers,  sur une période de cinq ans, de 2019 à 2023. Pour cela, il s’appuie sur le concept du suivi de tendance, une stratégie de tendance qui consiste à suivre la direction du marché, sans chercher à anticiper les changements.  Après une présentation de la revue de la littérature sur le sujet, nous présenterons les indicateurs et outils pour suivre une tendance, ensuite nous analyserons les données financières d’Apple, et son comportement boursier, sur une période de cinq ans. Nous allons conclure notre article en donnant des recommandations sur l’opportunité d’investir ou non dans l’action Apple

Effect of simvastatin on the extraction socket healing in the mandible of prednisolone-treated albino rat

Aim: This work aimed to evaluate the possible prophylactic effect of using Simvastatin as adjunctive treatment to ameliorate the effects of using prednisolone on the healing of the albino rat mandibular molar extraction socket.Materials and Methods: 42 rats were equally divided into 3 groups (I: received distilled water, II received Prednisolone, III: received simvastatin + prednisolone via gastric tube). After 5 weeks, the mandibular 1st molar was extracted then each group was further subdivided into 2 subgroups depending on sacrifice time after extraction: (A: 10 days and B: 21 days). Mandibular molar areas were processed for histomorphometric and immunohistochemical examination using osteonectin marker. The cell counts and new bone area percentage were measured and statistically analyzed using T-test, ANOVA and post hoc tukey tests. Results: Prednisolone significantly decreased the area of new bone, osteoblasts and osteocytes count. Simvastatin had positive effects in the active osteoblasts and recent osteocytes cell counts marked by osteonectin staining and the new bone formation to a comparable level to the control group. The significant effects of Simvastatin on wound healing were indicated by statistical analysis of different parameters. Conclusions: Prednisolone adversely affected the extraction socket healing. Simvastatin leads to minimizing the effects of prednisolone by increasing the cellular count and bone formation. Keywords: Simvastatin, Extraction Socket, Prednisolone, Rat

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

The implementation of Hotel revenue management practices and the implications on customers' behavioural intentions

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The Implementation of Hotel Revenue Management Practices and the Implication on Customers’ Behavioural Intentions.

Revenue Management (RM) has been regarded as one of the most researched areas in hospitality operations management study. RM is the practice of dynamically pricing a perishable product and selectively allocating scarce capacity across segmented demand and distribution channels, while taking into account customers’ profitability and value, in an effort to maximise gross total revenue and therefore improve profitability. A number of studies have tentatively looked into customers’ fairness perceptions of revenue management decisions, yet there is no reported empirical research that examines the impact of hotel revenue management on customers’ behavioural intentions in a real dynamic service encounter. Hence, the thrust of this research is to examine the impact of pricing practices on three customer groups: those who accept a reservation offer, those who decline a reservation offer, and those who are denied a reservation request. To bridge this gap, this research seeks to contribute to knowledge by investigating the relationship between hotel revenue management practices and the implications of this on customers’ behavioural intentions. In order to gain a richer and deeper understanding of the effects revenue management has had on customers’ behavioural intentions, a case study approach was adopted. An inductive exploratory single case study was conducted in a UK leading budget hotel chain. In depth data was collected based on a mixed methods approach and divergent data sources were used including semi-structured interviews with executives at the hotel chain and customers, observation, documentation, and a web-based survey completed by the visitors of the chain’s website. The research results in significant findings relating to customers’ perceptions to RM practices and the impact of these practices on their behavioural intentions. The findings are encouraging and suggest that the adoption and implementation of RM practices has great potential in the budget hotel sector under the following conditions: provide sufficient information on pricing and inventory control strategies to assist customer education about RM practices; and view RM as an integrated management practice to balance revenues/profits and customer relationships. This research provides several theoretical contributions to the literature and offers important implications for hospitality managers. The key contribution of this research indicates that the price paid for a room has a direct and positive effect on behavioural intentions of customers who have successfully made a booking. However, customers who declined a reservation offer or were denied a reservation request because of the quoted price, displayed negative behavioural intentions. To conclude, it is recognised that the generalisation of the findings is context-specific to the budget hotel sector and therefore is restricted. A number of areas for future research are identified to extend the boundaries of this research

Impact de la digitalisation sur les Ressources Humaines : Étude de Cas dans le Secteur Bancaire

The impact of digitalization on the human resources (HR) function within banking organizations, explores organizational changes largely influenced by technological advances and the digital revolution. Digitization is at the heart of these transformations, recalibrating operational models, employee interactions and corporate culture. Initiatives such as remote working, artificial intelligence, e-learning and data analytics are redefining internal and external change. In this study, we seek to explore the phenomenon of resistance in order to better understand it. How can the communication aspects of change help manage resistance? What strategies are effective in countering these defensive responses? What types of resistance emerge in this context? These questions form the starting point of my research. I believe that a better understanding of these responses will provide me with the tools I need to intervene constructively to facilitate the change process. In addition, I'm looking to identify specific reactions to the digital transition, particularly as regards e-learning. In order to provide relevant answers to this problem, we have first presented the theoretical framework which is addressed in the article, with the help of a literature review. This first part is dedicated to change management and, more specifically, to resistance to change. In the second part, we introduce the host company, and discuss the methodology used. I mention that I chose to use a qualitative method, to give the interviewee a certain freedom, and which produces and analyzes descriptive data that proves most appropriate to my theme. The results showed that the interviews provide important information for developing key recommendations when implementing e-learning in organizations. These suggestions include: listening to needs, staying people-centered, providing support, communicating and informing, mobilizing people, and evaluating and validating acquired knowledge The impact of digitization on the HR function may be influenced by external factors such as fluctuations in the agricultural market or policy changes, which may have different effects on the results. In addition, time and resource constraints may have limited the exploration of all relevant aspects, underlining the need for comprehensive and complementary research.   Keywords: Digitization, organizational change, resistance, HR Classification JEL: O33, O15 Paper type: Empirical ResearchL’impact de la digitalisation sur la fonction des ressources humaines (RH) au sein des organisations bancaires explore les changements organisationnels largement influencés par les progrès technologiques et la révolution numérique. La digitalisation est au cœur de ces transformations, recalibrant les modèles opérationnels, les interactions entre les collaborateurs et la culture d’entreprise. Des initiatives telles que le travail à distance, l’intelligence artificielle, l’apprentissage en ligne et l’analyse de données redéfinissent le changement interne et externe. Dans cette étude, nous cherchons à explorer le phénomène de résistance pour en mieux comprendre. Comment les aspects liés à la communication en période de changement peuvent-ils aider à gérer la résistance ? Quelles stratégies sont efficaces pour contrer ces réponses défensives ? Quels types de résistance émergent dans ce contexte ? Ces questions constituent le point de départ de ma recherche. On croit qu'une meilleure compréhension de ces réponses me fournira les outils nécessaires pour intervenir de manière constructive pour faciliter le processus de changement. Par ailleurs, nous cherchons à identifier les réactions spécifiques face à la transition vers le numérique, en particulier en ce qui concerne la formation en ligne (E-learning). Pour apporter des éléments de réponses pertinents à cette problématique, nous avons présenté dans un premier temps, le cadre théorique qui est abordé dans l’article à l'aide d'une revue de la littérature. Cette première partie sera dédiée à la gestion du changement et plus précisément, des résistances au changement. Dans un deuxième temps, nous avons présenté l’entreprise accueillante, elle évoque aussi la méthodologie utilisée ainsi, nous mentionnons qu’on a choisi de pratiquer une méthode qualitative, pour donner une certaine liberté à l’interviewé, et qui   produit et analyse des données descriptives qui s’avèrent les plus adéquates à mon thème. Les résultats ont montré que les entretiens fournissent des informations importantes pour élaborer des recommandations clés lors de la mise en œuvre de la formation en ligne dans les organisations. Ces suggestions incluent : écouter les besoins, rester centré sur les gens, apporter du soutien, communiquer et informer, mobiliser les gens, et évaluer et valider les connaissances acquises. L'impact de la digitalisation sur la fonction RH peut être influencé par des facteurs externes tels que les fluctuations du marché agricole ou les changements de politique, qui peuvent avoir différents effets sur les résultats. De plus, les contraintes de temps et de ressources ont peut-être limité l’exploration de tous les aspects pertinents, soulignant la nécessité d’une recherche globale et complémentaire.   Mots clés : Digitalisation, changement organisationnel, résistance, RH Classification JEL : O33, O15 Type de l’article : Étude empiriqu

Exploring the Role of Extrovert-Introvert Customers’ Personality Prototype as a Driver of Customer Engagement: Does Relationship Duration Matter?

Drawing on social exchange theory, the current study examines new drivers and their associated processes of customer engagement. In spirit, the study tests the direct and indirect impacts of the extraversion–introversion personality trait on customer engagement. The study takes into consideration the contingency role of time by testing the moderating role of relationship duration. Results demonstrate that the more extraverted customers are, the more they are likely to engage with service firms. Further, extraversion is positively related to customer–employee interaction, which in turn leads to more utilitarian and hedonic values perceived by customers. Both types of value, then, induce higher customer engagement behaviors in terms of customer referrals, knowledge sharing, and social-influence. Findings demonstrate that relationship duration moderates some of the examined relationships. The current study contributes to the literature by extending the knowledge on customer engagement\u27s predisposition and social causes

Clinical Characteristics of Patients with Myocarditis following COVID-19 mRNA Vaccination: A Systematic Review and Meta-Analysis

COVID-19 mRNA vaccinations have recently been implicated in causing myocarditis. Therefore, the primary aim of this systematic review and meta-analysis was to investigate the clinical characteristics of patients with myocarditis following mRNA vaccination. The secondary aims were to report common imaging and laboratory findings, as well as treatment regimes, in these patients. A literature search was performed from December 2019 to June 2022. Eligible studies reported patients older than 18 years vaccinated with mRNA, a diagnosis of myocarditis, and subsequent outcomes. Pooled mean or proportion were analyzed using a random-effects model. Seventy-five unique studies (patient n = 188, 89.4% male, mean age 18–67 years) were included. Eighty-six patients had Moderna vaccines while one hundred and two patients had Pfizer-BioNTech vaccines. The most common presenting symptoms were chest pain (34.5%), fever (17.1%), myalgia (12.4%), and chills (12.1%). The most common radiologic findings were ST-related changes on an electrocardiogram (58.7%) and hypokinesia on cardiac magnetic resonance imaging or echocardiography (50.7%). Laboratory findings included elevated Troponin I levels (81.7%) and elevated C-reactive protein (71.5%). Seven patients were admitted to the intensive care unit. The most common treatment modality was non-steroid anti-inflammatory drugs (36.6%) followed by colchicine (28.5%). This meta-analysis presents novel evidence to suggest possible myocarditis post mRNA vaccination in certain individuals, especially young male patients. Clinical practice must therefore take appropriate pre-cautionary measures when administrating COVID-19 mRNA vaccinations