Consistently Updating XML Documents Using Incremental checks With XQueries

When updating a valid XML Data or Schema, an efficient yet light-weight mechanism is needed to determine if the update would invalidate the document. Towards this goal, we have developed a framework called SAXE. First, we analyzed the constraints expressed in XML schema specifications to establish constraint rules that must be observed when a schema or an XML data conforming to a given XML Schema is altered. We then classify the rules based on their relevancy for a given update case. That is, we show the minimal set of rules that must be checked to guarantee the safety for each update primitive. Next, we illustrate that this set of incremental constraint checks can be specified using generic XQuery expressions composed of three type of components. Safe updates for the XML data have the following components: (1) XML schema meta-queries to retrieve any con-straint knowledge potentially relevant to the given update from the schema or XMl data being altered, (2) retrieval of specific characteristics from the to-be-modified XML, and (3) lastly an analysis of information collected about the XML schema and the affected XML document to determine validity of the update. For the safe schema alteration, the components are: (1) XML schema meta-queries to retrieve relevant information from the schema (2)analysis and usage of retrieved information to update the schema, and lastly to (3) propagate the changes to the XML data when necessary. As a proof of concept, we have established a library of these generic XQuery constraint checks for the type-related XML constraints. The key idea of SAXE is to rewrite each XQuery update into a safe XML Query by extending it with appropriate constraint check subqueries. This en-hanced XML update query can then safely be executed using any existing XQuery engine that supports updates - thus turning any update engine automatically into an incremen-tal constraint-check engine. In order to verify the feasibility of our approach, we have implemented a prototype system SAXE that generates safe XQuery updates. Our experimental evaluation assesses the overhead of rewriting as well as the relative performance of our loosely-coupled incremental constraint check approach against the more traditional first-change-document and then revalidate-it approach

Evaluation De La Prematurite Superieure Ou Egale A 32 Semaine D’amenorhée A L’hopital Regional De Ziguinchor Au Sud Du Senegal (Afrique De L’ouest)

Introduction: Prematurity is one of the leading causes of neonatal death in Africa. The objective of this work was to assess the preterm birth at the pediatric service of the regional hospital of Ziguinchor. Material and methods: This was a prospective, descriptive and analytical study of the case of hospitalized newborns whose age was between 32 SA to 36SA + 6 days. The study was conducted from May 21, 2013 to May 21, 2014. We included all premature infants at age ≥ 32SA.Those presenting a malformation were not included. We studied maternal socio-demographic, obstetric and neonatal parameters. Results: We have identified 140 newborns out of a total of 342 Preterm births and 2292 maternity births, a prevalence of 40.9% compared to preterm infants and 6.10% in relation to all births. 51.4 percent of mothers came from urban areas, 63.5 percent were between 20 and 34 years of age, not attending school in 45.7 percent, married in 72.9 percent and without work in 94.3 percent. The average gestures represented 3.09 . Arterial hypertension was the most common medical condition (67.7%). The followup was done by a midwife (82.1%) and 23.5% had received at least 4 NPC. Eclampsia and pre-eclampsia (48.9%) and RPM (42.8%) were common obstetric pathologies. The delivery was by caesarian (51.4%), hospital (92.1%), cephalic presentation (80%), with an average weight of 1816.79 g. An RCIU (16.4%), an RPM (61.9%). At birth, a DR (16.4%) was noted due to MMH (43.7%) and transitory tachypnea (50%). Asphyxia was reported in 3.5%. During hospitalization (6.7 days on average), 6.4% had RD caused by infection (77.7%). Other complications were infection (64.4%), hypoglycemia (28.5%), digestive hemorrhage (7.01%). The fatality rate was 7.9% due to infection (63.3%), DR (18%), haemorrhage (9%). The anthropometric measurements at the exit: P 1887.9g, T: 38.3cm, PC: 30.9cm; at 1 month P: 2387.1g, T: 46.6cm, PC: 32.8cm; at 30 months P: 12.1kg, T: 89.5cm, PC: 48.4cm. Conclusion: Moderate preterm birth accounts for almost half of the cases of prematurity in our series. Their optimal management would go through a better obstetric-neonatal collaboration but above all by the installation of kangaroo mother unit

Feasibility and safety of integrating mass drug administration for helminth control with seasonal malaria chemoprevention among Senegalese children: a randomized controlled, observer-blind trial

BACKGROUND: The overlap in the epidemiology of malaria and helminths has been identified as a potential area to exploit for the development of an integrated control strategy that may help to achieve elimination of malaria and helminths. A randomized, controlled, observer-blind trial was conducted to assess the feasibility and safety of combining mass drug administration (MDA) for schistosomiasis and soil transmitted helminths (STH) with seasonal malaria chemoprevention (SMC) among children living in Senegal. METHODS: Female and male children aged 1-14 years were randomized 1:1:1, to receive Vitamin A and Zinc on Day 0, followed by SMC drugs (sulfadoxine-pyrimethamine and amodiaquine) on Days 1-3 (control group); or praziquantel and Vitamin A on Day 0, followed by SMC drugs on Days 1-3 (treatment group 1); or albendazole and praziquantel on Day 0, followed by SMC drugs on Days 1-3 (treatment group 2). Safety assessment was performed by collecting adverse events from all children for six subsequent days following administration of the study drugs. Pre- and post-intervention, blood samples were collected for determination of haemoglobin concentration, malaria microscopy, and PCR assays. Stool samples were analyzed using Kato-Katz, Merthiolate-iodine-formalin and PCR methods. Urine filtration, PCR and circulating cathodic antigen tests were also performed. RESULTS: From 9 to 22 June 2022, 627 children aged 1-14 years were randomized into the three groups described above. Mild, transient vomiting was observed in 12.6% (26/206) of children in treatment group 2, in 10.6% (22/207) in group 1, and in 4.2% (9/214) in the control group (p = 0.005). Pre-intervention, the geometric mean value of Plasmodium falciparum parasite density was highest among children who received albendazole, praziquantel with SMC drugs. Post-intervention, the parasite density was highest among children who received SMC drugs only. Children who received praziquantel and SMC drugs had a lower risk of developing severe anaemia than their counterparts who received SMC drugs alone (OR = 0.81, 95% CI 0.13-5.00, p = 0.63). CONCLUSIONS: Integration of MDA for helminths with SMC drugs was safe and feasible among Senegalese children. These findings support further evaluation of the integrated control model. TRIAL REGISTRATION: The study is registered at Clinical Trial.gov NCT05354258

XML Update Transaction Execution Based on Incremental Constraint Checks

One of the most significant impacts of XML is that it is turning the web into a database. The popularity and advantage of XML in the web ask for sophisticated engines to support the manipulation of the data stored in XML documents. Many approaches are being studied for XML document updates. The more traditional XML-enabled database approach extends the relational database systems with the ability to store, manage and update XML documents. Unfortunately, because the relational databases do not fully support XML data structures, the solutions proposed are incomplete and have unresolved challenges. Another approach is to use native XML tools. Even though native tools for manipulating XML documents are available, most are still in their infancy phase. This is particularly true regarding updating XML data. Even though operations for updating XML documents at the node level exist, when it comes to updating a set of elements in an XML document, the process is left at the users’ control. This research studies the execution of a sequence of update instructions on an XML document, referred to as an “XML update transaction,” and proposes an efficient yet light-weight mechanism to make the update transaction an atomic operation. Various types of XML update transaction are defined depending on the update operations (deletes or inserts). Incremental constraint checks are automatically inserted in the update transaction to generate a safe XML update transaction, which will ensure that the transaction would commit only if it leaves the XML document valid relative to its schema. The safe XML update transactions can be executed using any XQuery engine that supports XML updates. Experiments were designed to assess the update transaction rewrite and the performance of the resulting safe XML update transactions, which shows that it takes &thetas;(n) time to execute an XML update transaction where n is the number of elements to be modified