PRESY: A Context Based Query Reformulation Tool for Information Retrieval on the Web

Problem Statement: The huge number of information on the web as well as the growth of new inexperienced users creates new challenges for information retrieval. It has become increasingly difficult for these users to find relevant documents that satisfy their individual needs. Certainly the current search engines (such as Google, Bing and Yahoo) offer an efficient way to browse the web content. However, the result quality is highly based on uses queries which need to be more precise to find relevant documents. This task still complicated for the majority of inept users who cannot express their needs with significant words in the query. For that reason, we believe that a reformulation of the initial user's query can be a good alternative to improve the information selectivity. This study proposes a novel approach and presents a prototype system called PRESY (Profile-based REformulation SYstem) for information retrieval on the web. Approach: It uses an incremental approach to categorize users by constructing a contextual base. The latter is composed of two types of context (static and dynamic) obtained using the users' profiles. The architecture proposed was implemented using .Net environment to perform queries reformulating tests. Results: The experiments gives at the end of this article show that the precision of the returned content is effectively improved. The tests were performed with the most popular searching engine (i.e. Google, Bind and Yahoo) selected in particular for their high selectivity. Among the given results, we found that query reformulation improve the first three results by 10.7% and 11.7% of the next seven returned elements. So as we can see the reformulation of users' initial queries improves the pertinence of returned content.Comment: 8 page

Sind E-Autos alltagstauglich oder werden sie dies in der Zukunft sein?

Die vorliegende Bachelorarbeit befasst sich mit der Frage über die Alltagstauglichkeit eines Elektroautos. Bekanntermaßen ist die geringe Reichweite, die ein Elektroauto fahren kann, die Hauptproblematik, welche zusätzlich von verschiedenen Faktoren beeinflusst wird. Besonders hohe Geschwindigkeiten als auch zu hohe oder zu niedrige Außentemperaturen können die Reichweite wirksam beeinträchtigen. Zur Beschreibung dieser Auswirkung wird für die Reichweite in Abhängigkeit von der Geschwindigkeit ein physikbasiertes Modell verwendet. Hinzufügend wird anhand von Daten ein Regressionsmodell für die Temperaturabhängigkeit erstellt. Mithilfe dieser Modelle können Aussagen über die Nutzungsmöglichkeit von Elektroautos in den Sommer- und Wintermonaten als auch für Hochgeschwindigkeitsstraßen wie beispielsweise auf Autobahnen getroffen werden

USING RUBRIC TO ASSESS PRIMARY SCHOOL STUDENTS' COMPETENCE IN TEACHING SCIENCE IN VIETNAM

Vietnam is in the early stages of implementing the reform of the curriculum and textbooks. Vietnam's general education is changing strongly from content-based teaching to competence-building teaching [1]. That change has been implemented by researchers and teachers in all elements of the teaching process, including testing and evaluation. Evaluation of educational outcomes needs to shift from testing memorization to assessing the ability to apply knowledge to solve practical problems, attaching importance to both assessment of learning outcomes and assessment in the learning process. In this situation, testing and assessment in teaching Science in primary schools are also interesting to many teachers, and assessment of scientific competence in teaching this subject is considered an important factor contributing to improving the quality of Science and the quality of subject teaching in the direction of developing students' ability. The article mentions some theoretical foundations and the actual situation of using Rubric in assessing the scientific competence of students in grades 4 and 5 when teachers teach Science, thereby proposing some measures to improve the effectiveness of assessment in teaching this subject.  Article visualizations

Malignant ventricular arrhythmias induction by programmed electrical stimulation of the right ventricular outflow tract only during type 1 brugada ECG maximization

OBJECTIVE: The role of electrophysiology study in Brugada syndrome (BS) sudden cardiac death risk stratification remains controversial and seems to depend on the phenotypic expression of the channelopathy. Ajmaline has a key role in the diagnosis of BS. We observed that programmed electrical stimulation (PES) of the right ventricular outflow tract (RVOT), only when type 1 BS ECG is unmasked by ajmaline administration, induces ventricular arrhythmias. CASE REPORT: We describe a case of ventricular fibrillation induction by PES of the RVOT when type 1 BS ECG is revealed by ajmaline, in a patient with a baseline dynamic intermittent type 1 and 2 BS ECG. CONCLUSIONS: The heterogeneous clinical presentations of BS are due to the underlying mechanisms. PES of the RVOT during positive ajmaline test maximizes the channelopathy and therefore sudden cardiac death risk-stratification in BS

Heart, COVID-19, and echocardiography.

AbstractAlthough clinical manifestations of coronavirus disease of 2019 (COVID‐19) mainly consist of respiratory symptoms, a severe cardiovascular damage may occur. Moreover, previous studies reported a correlation of cardiovascular metabolic diseases with severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS), and actually, many COVID‐19 patients show comorbidities (systemic hypertension, cardio‐cerebrovascular disease, and diabetes) and have a raised risk of death. The purpose of this review is to focus the cardiovascular effects of 2019‐nCoV on the base of the most recent specific literature and previous learnings from SARS and MERS and analyze the potential role of echocardiography during the current critical period and short‐ and long‐term follow‐up

Organizational Culture Factors Affect Employees’ Organizational Commitment: A Research in Ho Chi Minh City Logistics Enterprises, Vietnam

Research aims: The research aims to evaluate several factors of organizational culture affecting the organizational commitment of employees in logistics enterprises in Ho Chi Minh City (Vietnam).Design/Methodology/Approach: The data were collected based on a survey of respondents who were employees working at logistics enterprises in Ho Chi Minh City. The collected data, consisting of 227 survey questionnaires, were described through statistical analysis, checking Cronbach’s Alpha reliability assessment, employing Exploratory Factor Analysis (EFA), and testing the fit of the research model. Research findings: The results showcased that five components had a statistically significant impact on an employee’s organizational commitment, including (from high to low impact in order) consistency in governance policy, communication within the organization, training and development, rewards and recognition, and teamwork.Theoretical contribution/Originality: The study contributes to and supplements the array of organizational culture topics related to the commitment of employees at companies.Practitioner/Policy implication: The research contributes to the logistics companies' understanding of how to improve the organizational culture to maintain the loyalty of employees in the organization.Research limitation/Implication: The research limitation is that only Ho Chi Minh City logistics enterprises were chosen for the survey. However, there are many cities in Vietnam where logistics companies are located. Thus, the other research can be implemented in other regions in Vietnam and other countries for future studies

Perforator Mapping of the Superficial and Deep Inferior Epigastric Artery in the Abdominal Region of the Vietnamese

BACKGROUND: Previous studies worldwide have investigated the anatomy of the perforators of the deep inferior epigastric arteries to figure out the navigation patterns of the perforators on the abdominal wall. This has been inconsistent amongst the researchers about how to select the perforator to increase the blood supply area for the flap. AIM: To explore the blood supply area of the perforators of the superficial and deep inferior epigastric artery in the abdominal region of the Vietnamese by dissection and 64-slice multislice computed tomography (64-slice MSCT). METHODS: A descriptive cross-sectional study Center from September 2014 to September 2016 on two groups including 30 cadavers fixed by formalin 10% in Anatomy Department of UPNT, and 37 patients getting the 64-slice MSCT abdominal arteries angiogram. RESULTS: The superficial epigastric arteries at the level of the inguinal ligament were located in the middle region, with 96% (right) and 88.5% (left). The anterior superior iliac spine level was in the middle, and lateral regions of 68% and 32% respectively. The level of the umbilical cord was in the lateral region with 66.7% and 85.7%, respectively. There were about 6 perforators of the deep inferior epigastric arteries located in the navel area. These perforators were 70% in the medial region and 30% in the middle region. CONCLUSION: Mapping the blood supply based on the fourth space in the abdominal region in which the superfical inferior epigastric arteries supplied the lateral area. The middle and the internal ones were the perforators of the deep inferior epigastric arteries