46 research outputs found
Géologie et métallogénie des minéralisations à or et antimoine du Jbel Haouanite (Haut Atlas oriental, Maroc)
No full textThe gold and antimony mineralizations of Jbel Haouanite (Eastern High Atlas, Morocco) are hosted by tectonic structures carried by Ordovico-Silurian formations.Studies have shown that formations are affected by several tectonic phases. A first post-Silurian phase, prior to the magmatic intrusion, resulting in folds P1 and inducing schistosity S1. Then, a second phase affecting the magmatic rocks and manifested by folds P2 and schistosity S2. Finally, a third phase with P3 folds and S3 fracture schistosity.In the vicinity of magmatic rocks, shales are spotted with crenulation schistosity. With regard to brittle tectonics, the sector is larded with fractures, some of which are filled with quartz, others with quartz and carbonates and others with antimony and gold. In addition to the faulty and brecciated structures hosting the mineralization, the area has experienced polyphase tectonics with post-Silurian thrustings and post-mineralization NW-SE tectonics.Concerning the magmatism, the area of Jbel Haouanite has known at least two intrusions, the first of which is prior to the second phase of folding while the other is later. The latter was determined to be a rhyodacite.Mineralogical studies, using optical microscopy and SEM, have shown that gold mineralization is posterior to antimoniferous mineralization. Gold occurs either in grains or in cracks or associated with valentinite. Mineral paragenesis includes native gold, stibnite, valentinite, stibiconite, as well as antimony and lead sulfosalts.The statistical processing by PCR of the chemical analyzes made it possible to note the absence of correlation between the gold and the other elements. On the other hand, a correlation can be noted, particularly, between antimony and lead.The projection of the analytical results on the different diagrams allows us to conclude that the auriferous mineralizations are similar to the late-Hercynian "mesothermal orogenic" type.A comparison with some deposits with antimony and gold allows us to note a strong similarity with the mineralizations of the mine of La Lucette (French Armorican Massif) which would be in relation with a mafic magmatism. For the mineralization of Jbel Tazekka (Middle Atlas, Morocco), several types exist and particularly the "perigranitic" type which is different from Jbel Haouanite where the magmatic intrusions had not played a role, at least for the current concentrations.Les minéralisations à or et antimoine de Jbel Haouanite (Haut Atlas oriental, Maroc) sont encaissées par les structures tectoniques portées par des formations ordovico-siluriennes.Les études réalisées ont permis de noter que les formations sont affectées par plusieurs phases tectoniques. D’abord, une première phase post-silurienne, antérieure à l’intrusion magmatique, se traduisant par des plis P1 et induisant une schistosité S1. Ensuite, une deuxième phase affectant les roches magmatiques et se manifestant par des plis P2 et une schistosité S2. Enfin, une troisième phase avec des plis P3 et une schistosité de fracture S3. Au voisinage des roches magmatiques, les schistes sont tachetés avec une schistosité de crénulation. Concernant la tectonique cassante, le secteur est lardé de fractures dont certaines sont à remplissage de quartz, d’autres à quartz et carbonates et d’autres encore à antimoine et or. Outre les structures faillées et bréchifiées encaissant les minéralisations, le secteur a connu une tectonique polyphasée avec des charriages post siluriens et une tectonique NW-SE post minéralisation.Concernant le magmatisme, le secteur de Jbel Haouanite a connu au moins deux intrusions dont la première est antérieure à la deuxième phase de plissement alors que l’autre lui est postérieure. Cette dernière a été déterminée comme étant une rhyodacite.Les études minéralogiques, tant au microscope optique qu’au MEB, ont permis de constater que la minéralisation aurifère est postérieure à la minéralisation antimonifère. L’or se présente soit en grains, soit dans des fissures ou associé à la valentinite. La paragenèse minérale comporte l’or natif, la stibine, la valentinite, la stibiconite, ainsi que les sulfosels d’antimoine et de plomb. Le traitement statistique par ACP des analyses chimiques a permis de noter l’absence de corrélation entre l’or et les autres éléments. Par contre, une corrélation peut être notée, particulièrement, entre l’antimoine et le plomb.La projection des résultats analytiques sur les différents diagrammes nous permet de conclure que les minéralisations aurifères s’apparentent au type « orogénique mésothermal » tardi-hercynien.Une comparaison avec certains gisements à antimoine et or a permis de noter une similitude avec les minéralisations de la mine de La Lucette (Massif armoricain français) qui seraient en relation avec un magmatisme mafique. Pour les minéralisations de Jbel Tazekka (Moyen Atlas, Maroc), plusieurs types existeraient et particulièrement le type « périgranitique », ce qui est diffèrent de Jbel Haouanite où les intrusions magmatiques n’avaient pas joué de rôle, du moins pour les concentrations actuelles
A Look at the Condition of Women in Malentendues by Azza Filali
No full textA Look at the Female Condition in Malentendues by Azza Filali
This article analyzes the female condition through the central character of Malentendus by Azza Filali. It explores the tensions between social injunctions and individual aspirations, highlighting how the author constructs a female figure striving for emancipation in a Tunisian context marked by deep contradictions. The study examines the narrative and discursive strategies that reveal the obstacles, resistances, and ambiguities shaping the character’s journey. Adopting a literary and socio-critical approach, this article investigates the representation of power dynamics and identity issues in the novelCe travail propose une analyse de la condition féminine à travers le personnage central de Malentendues d’Azza Filali. Il s’agit d’explorer les tensions entre injonctions sociales et aspirations individuelles, mettant en avant la manière dont la romancière présente une figure féminine en quête d’émancipation dans un contexte tunisien marqué par des contradictions majeures. L’article examine les stratégies narratives et discursives qui révèlent les obstacles, les résistances et les ambiguïtés du parcours de ce personnage. En adoptant une approche sociocritique, ce travail interroge la représentation des rapports de pouvoir et des dynamiques identitaires à l’œuvre dans le roman
Roles and responsibilities of family home caregivers for elderly people in Qatar: Experiences and challenges
No full textGold and Antimony Mineralizations of Jbel Haouanite (High Atlas, Morocco) in Their Geodynamic Context
No full textThe gold and antimony mineralizations of Jbel Haouanite (Eastern High Atlas, Morocco) are hosted by quartz veins in tectonic structures carried by Ordovico-Silurian Paleozoic formations. At least three phases of folding tectonics affected the area, inducing three generations of folds accompanied by two flow schistosities and a fracture one. Magmatic intrusions of a rhyodacitic nature are post-Silurian and prior to mineralization. From a mineralogical point of view, paragenesis includes native gold, stibnite, valentinite, stibiconite, as well as antimony and lead sulfosalts. Petrographic studies and chemical analyzes show the lack of correlation between gold and the different elements. Thus, the gold would have deposited later to antimony and is associated with oxidation minerals, especially valentinite. The results of the analyzes on different diagrams makes it possible to conclude that the gold mineralizations are of the mesozonal to epizonal orogenic type and they would be late-Hercynian
A Comparative Study of the Self-Assembly of Achiral and Chiral Hairy Nanoparticles with Polystyrene Cores and Poly (2- hydroxyethylmethacrylate) Hairs
No full textHairy nanoparticles with polystyrene cores (PS cores) and poly(2 hydroxyethylmethacrylate) (PHEMA) shells were synthesized by combining living anionic polymerization and atom transfer radical polymerization (ATRP). The structural characterization was carried out by FT-IR and NMR spectroscopy (1H NMR, 13C NMR, APT 13C NMR and 1H 13C HMQC). The thermal stability of the PS cores was not a?ected by grafting PHEMA on their surfaces. A di?erential scanning calorimetry (DSC) thermogram of the HNPs showed two distinct transition temperatures indicating microphase separation. Chiral HNPs were prepared by inducing chirality in the achiral HNPs by complexation with R- or S-mandelic acid. The circular dichroism (CD) spectroscopy of complexes of the HNPs/R- or S-mandelic acid indicated the formation of enantiomeric chiral structures. The self-assembled structures formed from the achiral HNPs show di?erent surface morphologies, porous and zigzag, dependent on the solvents used. Blends of polystyrene functionalized with hydroxyl groups and PHEMA show di?erent morphology and thermal properties compared with the core shell HNP system. The chiral HNPs self-assembled into donut like structures or toroids with sizes in the range between 200 to 5000 nm. The study suggests that chirality can be utilized to develop interesting self-assembled structures
Analysis of residential energy consumption characteristics: A comparative study between two cities in China and the U.S
No full textThe author has granted permission for their work to be available to the general public.This study compares and analyzes residential energy use patterns in the two dominant housing typologies in two cities with similar climates in the U.S. and China (Houston, TX and Xiamen, China). The study included developing four residential models representing a single-family-house and a multi-family-house in both Houston and Xiamen using the building performance simulation tool, eQuest. Inputs for the models were based on existing building codes, census data, government surveys, validated previous studies, and a household survey conducted in Xiamen, China. The models were used to study the impact of building physical characteristics and occupant behavior on residential energy consumption patterns in both cities. The results of the simulation were then analyzed and the outcomes of the analysis were used to identify opportunities for reducing Chinese residential energy use. The research outcomes indicate that the low energy efficiency of building envelopes and systems in Chinese houses are a major issue in Chinese residential buildings. Avoiding the potential increase in energy use in the Chinese residential sector requires taking steps to improve the efficiency of building envelopes, systems, and appliances. The research provides specific recommendations for Chinese energy conservation policy-makers as well as developers and companies working in the Chinese residential sector. The research also provides the foundation for future studies aiming to improve the energy efficiency of Chinese houses.Architectur
Optimal Rehabilitation of Urban Drainage Systems: Application of single-objective optimisation for the implementation of Green-Blue-Grey Infrastructures in changing climate
No full textUrban Drainage Systems (UDS) are one of the most vital yet, complex infrastructures that support people's livelihood in urban areas. However, due to their mainly underground infrastructure and complexity, the planning and management of UDS are usually associated with high investment, which stakeholders sometimes overlook. As long-lived infrastructures, UDS’s limited capability is being put under constantly increasing pressures. Amongst the pressures, the global effects of climate change on rainfall extremes is the most important. As climate change affects the rainfall extremes and the overall hourly and daily rainfall events, urban flooding issues are becoming more costly to manage. Several rehabilitation efforts have been made to address this issue with minimum cost and optimal performance in flood reduction by increasing the resiliency of UDS in order to minimise the duration and magnitude of urban flooding. Rehabilitation of UDS can be done in several ways, including implementing Green-Blue-Grey Infrastructures (G-B-G measures). The combination of G-B-G measures can increase the resiliency of the UDS to withstand higher intensity rainfall by reducing both the peak flow and enlarging the capacity of the UDS system. Therefore, this thesis aims to develop a method to find the optimal way to rehabilitate an existing UDS to reduce the risk of flooding under the climate change rainfall scenarios. The method developed coupled a hydrodynamic model, Storm Water Management Model (SWMM), and Genetic Algorithm (GA) to find the optimal solution to rehabilitate UDS. The effect of climate change was incorporated by simulating the solutions using composite design storms that represent the increase in hourly and daily rainfall extremes for 2030, 2050, and 2085. The objective function of this optimisation problem becomes the minimisation of the total cost to implement the measures for the rehabilitation of UDS, under the constraint that no flooding can happen on the system when tested against the climate change rainfall scenarios. Therefore, the decision variables of this optimisation are the size and location for each implemented measure, while the penalty cost is associated with the cost of each m3 of flooding. Based on the analysis of the case study, the most appropriate Green-Blue measures to be implemented is Rain Barrels, Infiltration Trenches, and Pervious Pavements. Meanwhile, for grey measures, it is best to consider pipe and pump replacements and increasing the CSOs’ weirs. The optimisation was done using the developed formal method and manual trial-and-error. The results of the formal optimisation have been confirmed to outperform the result from manual optimisation using the traditional trial-and-error method. The optimal solutions proved that a combination of both grey and G-B measures produced the lowest cost to reduce flooding. Although the solutions can be adapted over time from 2030 until 2085, the results show that adaptive solutions might not be needed when the solution for 2085 is better implemented from the year 2030. Overall, it can be projected that in the future, the combination of G-B-G measures can produce an economically optimal solution to be implemented in order to achieve zero floodings in the case study location.Water Managemen
Cytokines in Gaucher disease: Role in the pathogenesis of bone and pulmonary disease
No full textAbstractGaucher disease (GD) is the most frequently encountered lysosomal storage disease caused by inborn defects of the membrane-bound lysosomal enzyme, acid β-glucosidase or glucocerebrosidase. This defective activity causes an accumulation of glucocerebroside (glucosylceramide) in the lysosomes of cells derived from the monocyte/macrophage lineage. Glucocerebroside-engorged cells, termed Gaucher cells, infiltrate various organs, leading to multisystemic abnormalities. The mechanisms by which systemic and organ-specific involvement is propagated or initiated remain unclear. Studies are increasingly recognizing the role of immune dysregulation and inflammation in the pathogenesis of Gaucher disease. Many cytokines have been reported as mediators of tissue damage in Gaucher disease. Bone and lung disease are serious causes of morbidity in non neuronopathic Gaucher disease. The progress in the understanding of the pathogenesis or relevant mechanism(s) of Gaucher disease is providing insights into additional therapeutic targets, enabling the potential for optimized patient outcomes with the use of adjunctive or supplemental agents
Hairy Nanoparticles with Hydrophobic Polystyrene Cores and Hydrophilic Poly(2-hydroxyethylmethacrylate) Hairs: Synthesis and Characterization, 2019
No full textThe self-assembling properties of a core-shell system are considered to be the most desirable characteristics that allow using this class of polymers in different applications. New hairy nanoparticles (HNPs) with hydrophobic polystyrene cores (PS Cores) and hydrophilic poly(2-hydroxyethylmethacrylate) (PHEMA) shells were synthesized by coupling polymerization methods. Living anionic polymerization in one-pot step was used to synthesize cross-linked polystyrene cores functionalized with hydroxyl groups and atom transfer radical polymerization (ATRP) was then carried out to prepare PHEMA hairs following the grafting form technique. The structural characterizations were carried out by FT-IR and NMR spectroscopy (1H NMR, 13C NMR, APT 13C NMR and 1H 13C HMQC). Dynamic light scattering measurements of obtained HNPs show small increase in the order of nanometers of their hydrodynamic radii after the grafting. Thermal properties were studied by TGA and DSC. The thermal stability of PS cores was affected by functionalization with the hydroxyl group. However, the stability of the PS core was not affected by grafting of PHEMA on their surfaces. DSC thermograms of the HNPs shows two distinct transition temperatures corresponding to glass transition temperatures (Tg) of a PS phase and of a PHEMA phase indicating the formation of a hydrophobic-hydrophilic phase separated system. SEM and AFM were utilized to study the morphologies and self-assembly of nanoparticles. The self-assembled HNPs morphologies were dependent on the solvents used. Complexes of the synthesized HNPs and R- or S-mandelic acid were prepared and characterized by circular dichroism (CD) and AFM. CD was used to study the induced chiral properties of the complexes. The CD spectra indicated the formation of enantiomeric chiral structures and the AFM images show toroidal self-assembled structures. Polymer blends of polystyrene functionalized with hydroxyl groups and PHEMA show different morphology and different thermal properties than the core-shell HNP system. KEYWORDS: Polymer Chemistr
Problem Solving Training Strategy and Its Effect on Nurse Managers' Thinking and Decision Making Styles
No full textAbstract: Nurse managers must have critical thinking and effective problem-solving skills in order to improve the patient care system, make effective decision, and attain the institutional outcomes, and achieve institutional aims. Aim: Assess the effect of implementing a training strategy about problem solving and measuring its’ effect on thinking and decision making styles of nurse managers. Research design: One group pre- test / post- test research design was used to achieve the aim of the current study. Setting: This study was conducted at Nasser General Hospital. This hospital is affiliated to Ministry of Health hospitals at Qalyoubia Governorate, Egypt. Subjects: The study included 50 nurse managers. Tools: Data were collected by two main scales namely; thinking styles scale, and decision-making styles scale. Results: There were significant statistical differences regarding all dimensions of thinking style and total thinking style throughout implementing a strategy stages with elevation in post strategy and follow up than pre strategy. There were significant statistical differences regarding all dimensions of decision-making style and total thinking style throughout implementing a strategy stages with elevation in post strategy and follow up than pre. Conclusion: There were an improvement of nurse managers’ thinking and decision making styles throughout implementing the problem solving training strategy. Recommendations: Conducting a regular workshop for nurse managers about decision making as needed, conduct regular meeting with staff nurses to identify problems early and manage it, and continuous application of needs assessment to recognize nurse manager regarding decision making.
Keywords: Problem Solving, Thinking, Decision Making, Styles, Strategy, Nurse Managers.
Title: Problem Solving Training Strategy and Its Effect on Nurse Managers’ Thinking and Decision Making Styles
Author: Azza Mohamed Abd elkader, Rabab Mahmoud Hassan, Fawzia Mohamed Badran
International Journal of Novel Research in Healthcare and Nursing
ISSN 2394-7330
Vol. 9, Issue 3, September 2022 - December 2022
Page No: 19-29
Novelty Journals
Website: www.noveltyjournals.com
Published Date: 21-September-2022
DOI: https://doi.org/10.5281/zenodo.7100584
Paper Download Link (Source)
https://www.noveltyjournals.com/upload/paper/Problem%20Solving%20Training%20Strategy-21092022-3.pdfInternational Journal of Novel Research in Healthcare and Nursing, ISSN 2394-7330, Novelty Journals, Website: www.noveltyjournals.co
