Une approche centrée exigences pour la composition de services web

International audienceThis paper presents a requirement-centric approach for Web service composition which allows: (i) modeling users' requirements with the MAP formalism and specifying required services using an Intentional Service Model (ISM); (ii) discovering relevant Web services by querying the service search engine Service-Finder; (iii) selecting automatically relevant and high QoS services by applying Formal Concept Analysis (FCA); and (iv) generating automatically BPEL coordination processes by applying the model transformation technique. In this paper, we illustrate our approach with a conference arrangement application and we validate it empirically in terms of precision and recall on this application. MOTS-CLÉS : composition de services web, exigences des utilisateurs, QdS, AFC, transformation de modèles.Cet article présente une approche centrée exigences pour la composition de services web qui permet : (i) la modélisation des exigences des utilisateurs avec le formalisme la Carte et la spécification des services requis avec un modèle intentionnel de services (MIS) ; (ii) la découverte des services web pertinents en interrogeant le moteur de recherche de services Service-Finder ; (iii) la sélection automatique de services pertinents et de haute QdS par l'application de l'analyse formelle de concepts (AFC) ; et (iv) la génération automatique de processus de coordination BPEL par l'application de la technique de transformation de modèles. Dans cet article, nous illustrons notre approche par une application d'arrangement de conférences et nous la validons empiriquement en termes de précision et de rappel sur cette application

Interest of the therapeutic education in patients with type 2 diabetes observing the fast of Ramadan

AbstractThe fast of Ramadan is a dilemma for diabetic patients due to the complexity of the management of diabetes during this holy month and the multiple risks they face (hypoglycemia, etc.).ObjectivesEvaluate the impact of a structured protocol of therapeutic education in a sample of type 2 diabetes, who were authorized by their doctors to fast, on metabolic and anthropometric profiles.MethodsThis prospective study was conducted among 54 type 2 diabetic patients (28 men and 26 women) aged 36–65years, recruited from National Nutrition Institute. Patients were divided into two groups: the first group (n=26) received an education session one to two weeks before the month of Ramadan; the second group (n=28) did not have appropriate therapeutic education except therapeutic adjustments. All our diabetic patients benefited from anthropometric measurements, determination of body composition and metabolic assessment (HbA1c, cholesterol, triglycerides, etc.) before and after the month of Ramadan.ResultsThe fast was completed without complications in 25 diabetic patients educated group and 22 control patients.We found that weight loss was greater among educated diabetic patients (−1.05kg) than in controls (−0.58kg), but without statistical significance. Body composition has not undergone significant changes in both diabetic groups.Therapeutic education has led to a decline of 0.27% in HbA1c in the educated group while glycemic control in diabetic patients uneducated remained stable. Furthermore, we observed a better lipid profile in diabetic patients educated than those who did not have education.ConclusionOur results justify the interest of patient education centered on the month of Ramadan in all type 2 diabetic patients observing the fast of the holy month. This education should be continued during Ramadan in order to fulfill this religious rite safely

Salt intake in a group of Tunisian obeses

Background: Salt is directly related to hypertension and cardiovascular disease associated with it. As obesity facilitates the effect of salt, a quantification of obese salt intake is necessary.Methods: Our patients numbering 56 have been recruited in the consultation of the obesity unit. Patients were given a questionnaire about their knowledge concerning salt. Natriuresis of 24 h was quantified. The average amount of sodium consumed per day from foods was determined (SAL), the average amount of sodium consumed per day from table salt added to cooking and seasoning (SAC) and the average total amount of sodium consumed per day (STOQ).Results: The mean age of our patients was 44.31 ± 12.8 years. The average BMI of our patients was 37.12 ± 5.9 kg/m2. The average systolic blood pressure was 123.8 ± 14 mmHg and mean diastolic blood pressure was 76.45 ± 10.7 mmHg. The average amount of sodium consumed per day from food (SAL) was 1 915 ± 1038 mg. The average amount of sodium consumed per day from cooking salt (SAC) was 2487 ± 1663 mg. The total amount of sodium consumed per day (STOQ) was 4402 ± 1831 mg. This addition is equivalent to 11 ± 4.6 g of salt per day. The total sodium intake exceeded 2000 mg/day in 89.2% of patients. More than half (57%) of spontaneous sodium intake comes from salt added. The average natriuresis in our population is 158 ± 68 mmol/24 h, higher than the norm in 18% of cases. The majority (85%) of our patients have claimed that excess salt is bad to very bad for health.Conclusion: Our study showed the importance of salt consumption in obeses and especially table salt and yet the majority of our patients consider it to be harmful to health.It will be necessary to take into account the sodium intake when prescribing the diet.Keywords: Obesity, Salt, Sodium intake, Natriuresis 24

Nutritional risk factors for postmenopausal osteoporosis

Background: Osteoporosis is a bone disease that combines both a decrease in bone density and its internal architecture changes. Nutrition is one of the major determinants of osteoporosis.Aim: The purpose of our study was to identify nutritional risk factors of osteoporosis of two groups of osteoporotic women and witnesses.Methods: We conducted a comparative cross-sectional study including 60 postmenopausal women and screening for osteoporosis by a bone densitometry, recruited the outpatient service of Rheumatology of the Institute KASSAB.Results: We have identified excessive supply of saturated fatty acids (SFA) in the osteoporotic compared with controls (13.27% vs 10.23%, p= 0.002) and an inadequate intake of monounsaturated fatty acids (MUFA) (12.6% vs 16.16%, p=0.012).A low calcium intake is another factor of risk of osteoporosis (574.27 ± 336.9 mg/day vs 782.45 ± 340.54 mg/day; p= 0.021). This is explained by the low consumption of milk and milk products objectified in the osteoporotic group (p= 0.001). We also found a negative relationship between inadequate intakes of potassium and osteoporosis (2241.55 ±1049.85 mg/day vs 2988.17 ± 1146.52 mg/day; p= 0.011). This may be due to the low consumption in fruit and vegetables, sources of potassium, found in the osteoporotic group (p= 0.003).We found a significant increase in the consumption of the VVPO group in the osteoporotic toward women witness (2.23 ± 0.99 number of times/day vs 1.67 ± 0.76 number of times/day; p= 0.019). A high consumption of coffee appears also as a risk factor since the osteoporotic group consume almost twice than controls (p= 0.002).Conclusion: Nutritional risk factors of osteoporosis are all the most important that they are editable and can take their place in a prevention of public health policy.Keywords: Osteoporosis; Menopause; Risk factors; Nutritio

QoS testing of service-based applications

International audienceWeb services (WSs) are becoming increasingly popular because of their potential in several application domains including e-Enterprise, e-Business, e-Government, and e-Science. Based on open XML standards, WS technology allows the construction of massively distributed and loosely coupled applications. A service composition mechanism should satisfy not only functional properties but also non-functional Quality of Service (QoS) ones. In this paper, we introduce a discrete-events modeling approach for Service-Based Applications (SBAs). This approach is oriented towards QoS evaluation through simulation

A Multi-Perspective Approach for Web Service Composition

The new paradigm for distributed computing over the Internet is that of Web services (WSs). One of the key ideas of this new paradigm is the ability to create value-added Service-Based Applications (SBAs) by composing pre-existing services. Building SBAs necessitates the discovery and the selection of the most appropriate WSs that fit closely users ’ functional and non-functional requirements. Due to the large number of WSs that are advertised over public and private registries and the various functional and non-functional capabilities that are required by users, discovery and selection of WSs have become a real challenge nowadays. In this paper, we present a WS composition approach that is built upon both perspectives: intentional and operational. In the intentional perspective, we propose to model users ’ requirements for SBAs using the MAP formalism and specify the required WSs using an Intentional Service Model (ISM). In the operational perspective, we propose to discover the required WSs by querying the service search engine Service-Finder and select the most appropriate WSs by using many-valued concept lattices. To validate our approach, we use an analytical technique that is the monitoring to verify that the selected WSs assure the required users ’ non-functional capabilities

A Discrete-Events Simulation Approach for Evaluation of Service-Based Applications

One of the promises of the Service-Oriented Architecture (SOA) is to build complex added-value services in order to enhance and extend existing ones. Service-Based Applications (SBAs) are asked not only to perform required functionalities, but also to deliver expected level of Quality of Service (QoS). Dealing with QoS management of such distributed applications, which are executed in dynamic environments, raises the need to consider context characteristics. This paper proposes a discrete-events simulation approach which assures the evaluation of SBAs performance under different context status. The main contributions of this paper are: (i) the discrete-events modeling approach for SBAs, (ii) the context-based model for SBAs considered in the discrete-events simulation model, and (iii) the evaluation of a set of QoS metrics by simulation