STRATEGIC VIGILANCE: AN EFFECTIVE MECHANISM IN ENHANCING SUSTAINABLE COMPETITIVE ADVANTAGE - A STUDY OF A SAMPLE OF ALGERIAN INSTITUTIONS

Purpose: This article addresses the role of strategic vigilance in building and enhancing competitive advantage and sustainability in organizations; In order to monitor its external environment and predict future changes to strategic decision-making and achieving its objectives, the article aims to research the reality of the implementation of strategic vigilance and its role in sustaining the competitive advantage in the organization.   Methodology: A comprehensive review of the literature and the analysis of studies that dealt with the subject of strategic vigilance and competitive advantage, and the analytical descriptive approach to familiarity with the subject, and the SPSS statistical program were used, by studying a sample of Algerian institutions.   Results: The results indicate the need to adopt the strategic vigilance system to monitor and analyse strategic information to exploit opportunities and confront threats, and that achieving sustainable competitive advantage is an important strategic direction for organizations that seek leadership and success, which are achieved through knowledge and capabilities of human resources.   Practical Implication: The study proposes several practical measures for the decision-makers in the institutions, through which it can enhance the competitive advantages of it, including the creation of an independent structure that performs the function of strategic vigilance in the organization, and the attention to the external environment of the institution by following all the transformations in it. To study it, then adapt and coexist with it, as well as the continuous encouragement of individuals to be creative and to provide the appropriate conditions that allow the establishment of continuous competitive advantages for the institution. The recommendations aim to create a suitable environment for activating the strategic vigilance system.   Originality/Value: This article contributes to highlighting the growing need to adopt a strategic vigilance system that maintains an institution's position and contributes to its competitiveness, in addition to revealing the level or indicators of the practice of strategic vigilance, and guidance. The attention of decision-makers in Algerian institutions is the importance of investing in building a strategic vigilance system as ways to build sustainable competitive advantages

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Crises convulsives révélant un Syndrome de Sheehan (à propos d’un cas)

Sheehan’s syndrome or pituitary necrosis postpartum is a rare disease of difficult and often delayed diagnosis. Authors report the case of a patient who presented seven months after a postpartum hemorrhage, seizures preceded by premonitory symptoms of hypoglycemia. The electroencephalogram, made in the immediate aftermath of the attacks, was normal; the biological assessment was objectified Electrolyte disturbances such as hypoglycemia, hypernatremia and hyperkalemia. The notion of intense asthenia, weight loss, amenorrhea and lack of lactation led to hormonal explorations and CT scan which were in favor of hypopituitarism with aspect partially empty sella and sellar arachnoïdocèle. Sheehan syndrome diagnosis with partial hypopituitarism respecting gonadotropic axis was chosen especially as there has been a return of menses after hormone replacement. This observation serves as a reminder of the pathophysiological bases of hypoglycemia in the Sheehan syndrome and its relationship to seizures; it discusses the possibility of early diagnosis of this disease. In addition, it has demonstrated the possibility of occurrence of partial hypopituitarism meeting one of the most sensitive to ischemia pituitary axes.Le syndrome de Sheehan ou nécrose hypophysaire du post-partum est une pathologie rare de diagnostic difficile et souvent tardif. Les auteurs rapportent le cas d’une patiente qui a présenté, sept mois après une hémorragie de la délivrance, des crises convulsives précédées de prodromes d’hypoglycémie. L’électroencéphalogramme, réalisé dans les suites immédiates des crises, était normal, le bilan biologique avait objectivé des troubles hydro électrolytiques à type d’hypoglycémie, hyperkaliémie et hyponatrémie. La notion d’asthénie intense, amaigrissement, aménorrhée et d’absence de lactation ont conduit à des explorations hormonales et scénographiques qui étaient en faveur d’une insuffisance antéhypophysaire avec aspect de selle turcique partiellement vide et arachnoïdocèle sellaire. Le diagnostic syndrome de sheehan avec insuffisance antéhypophysaire partielle respectant l’axe gonadotrope a été retenu d’autant plus qu’il y a eu un retour de couches après substitution hormonale. Cette observation permet de rappeler les bases physiopathologiques de l’hypoglycémie dans le cadre du syndrome de sheehan et son rapport avec les crises convulsives et de discuter la possibilité de diagnostic précoce de cette pathologie. De plus elle a démontré la possibilité de survenue d’une insuffisance antéhypophysaire partielle respectant l’un des axes les plus sensibles à l’ischémie hypophysaire

Physical and mechanical studies on binary blended Portland cements containing mordenite-rich tuff and limestone filler

In this research, we made physical and mechanical analyses thanks to which we deduced that the potential of replacing the Portland cement up to 20% by modernite-rich tuff (TM) and limestone filler (LF). The experimental procedure was done in two main stages. The first stage was dedicated to the pastes, including water requirement, setting time, hydration heat and free Ca(OH)2 content. In the second stage, mechanical and physical properties of mortars, water porosity and pore size distribution were studied. The final results show that LF mixtures closest to the control mixtures unlike the MT mixtures which exhibited a high water demand, less free Ca(OH)2, rapid appearance of the maximum thermal effect, an increase in the total and water accessible porosity, there is also a delay in improving of strength

Blended cement hydration assessment by thermogravimetric analysis and isothermal calorimetry

In the present study, the hydration of Portland cement pastes containing 5%, 10%, 15% and 20% tuff, limestone filler and granodiorite was investigated by thermogravimetric analysis coupled with differential scanning calorimetry and microcalorimetry isotherm. The monitoring of the hydration kinetics by thermogravimetric analysis made it possible to quantify the quantity of water combined with the cement (nonevaporable water) and the degree of hydration. By coupling this technique to the differential scanning calorimetry, it was also possible to measure the energy absorbed or released by the material during its decomposition. The results showed that the non-evaporable water content and the degree of hydration of the mixtures containing various mineral admixtures were relatively lower with respect to the reference mixture when as the content of mineral admixture increased. The effect of the evolution of the hydration process on the mechanical properties of mortars was also monitored. The relative variation of the compressive strength to that of the flexural strength was evaluated at 7, 28 and 90 days. Results showed that all the mixtures have a greater contribution in flexion than in compression

Blended cement hydration assessment by thermogravimetric analysis and isothermal calorimetry

In the present study, the hydration of Portland cement pastes containing 5%, 10%, 15% and 20% tuff, limestone filler and granodiorite was investigated by thermogravimetric analysis coupled with differential scanning calorimetry and microcalorimetry isotherm. The monitoring of the hydration kinetics by thermogravimetric analysis made it possible to quantify the quantity of water combined with the cement (nonevaporable water) and the degree of hydration. By coupling this technique to the differential scanning calorimetry, it was also possible to measure the energy absorbed or released by the material during its decomposition. The results showed that the non-evaporable water content and the degree of hydration of the mixtures containing various mineral admixtures were relatively lower with respect to the reference mixture when as the content of mineral admixture increased. The effect of the evolution of the hydration process on the mechanical properties of mortars was also monitored. The relative variation of the compressive strength to that of the flexural strength was evaluated at 7, 28 and 90 days. Results showed that all the mixtures have a greater contribution in flexion than in compression