After about two years of emergency remote teaching during the pandemic, the teaching of mathematics is slowly returning to (what used to be called) . However, after the period of mostly teaching online, there is uncertainty about the extent to which we will return to the way we were teaching before. In this survey paper we attempt to give some background to the impact that emergency remote teaching may have had on teaching mathematics.
View Article and Find Full Text PDFThe global COVID-19 pandemic has provided an opportunity to re-examine the possibility of organising virtual conferences in mathematics education, in which the social needs of participants can also be addressed. In this study we investigated the future impact that this change may have on the format and nature of mathematics education conferences. The study was conducted in two phases.
View Article and Find Full Text PDFResearch literature on the role of mathematics teachers during the COVID-19 crisis shows that teacher preparation for emergency situations is required. In reporting on this exploratory study, we present and analyse lesson plans created by seven future teachers for mathematics classes during the pandemic. Data were collected between April and October 2021 from 16 four-hour class sessions in a Mathematics Degree Program at a public university in Medellín, Colombia.
View Article and Find Full Text PDFThe COVID-19 pandemic has changed the agenda of mathematics education. This change will be analyzed by looking at three trends in mathematics education: the use of digital technology, philosophy of mathematics education, and critical mathematics education. Digital technology became a trend in mathematics education in response to the arrival of a different kind of artifact to the mathematics classroom.
View Article and Find Full Text PDFIntroduction: Abdominal surgery in patients with Crohn's disease (CD) is challenging, especially in the biologic era. The aim of this study was to evaluate factors associated with increased risk for postoperative complications in CD.
Methods: A retrospective study was conducted with consecutive patients who underwent abdominal surgery for CD from January 2012 to January 2018.
Growing use of the internet in educational contexts has been prominent in recent years. In this survey paper, we describe how the internet is transforming the mathematics classroom and mathematics teacher education. We use as references several reviews of use of the internet in mathematics education settings made in recent years to determine how the field has evolved.
View Article and Find Full Text PDFThis study aimed to evaluate dental implant outcomes and to identify risk factors associated with implant failure over 12 years via dental records of patients attending an educational institution. Dental records of 202 patients receiving 774 dental implants from 2002 to 2014 were analyzed by adopting a more reliable statistical method to evaluate risk factors with patients as the unit [generalized estimating equation (GEE)]. Information regarding patient age at implantation, sex, use of tobacco, and history of systemic diseases was collected.
View Article and Find Full Text PDFDiagnosis of malignancy in the vermiform appendix is quite rare. The most common histological malignant neoplasia found in this tiny portion of the gastrointestinal tract is represented by the mucinous adenocarcinoma. This entity predominates in males around 50 years of age, and clinical presentation usually mimics or occurs along with an acute appendicitis.
View Article and Find Full Text PDFBackground And Purpose: Carbon dioxide pneumoperitoneum is associated with significant hypercarbia and acidosis. The aim of this study is to evaluate the effects of carbon dioxide and helium pneumoperitoneum on renal function.
Materials And Methods: Thirty adult dogs were put randomly into one of three groups (n=10 animals each): group A--pneumoperitoneum not performed; group B--CO(2) pneumoperitoneum; and group C--helium pneumoperitoneum.
Gastroesophageal reflux disease often presents as heartburn and acid reflux, the so-called "typical" symptoms. However, a subgroup of patients presents a collection of signs and symptoms that are not directly related to esophageal damage. These are known collectively as the extraesophageal manifestations of gastroesophageal reflux disease.
View Article and Find Full Text PDFA small number of cases of Crohn disease associated with myelodysplastic syndromes or leukemia have been reported in adults in the last 25 years in the English-language medical literature. The authors report a case of a 9-year-old boy who developed Crohn disease and myelodysplastic syndrome concurrently. Analysis of his bone marrow showed a chromosome 20 abnormality.
View Article and Find Full Text PDFBackground And Purpose: Mechanical and hormonal factors have been implicated in pneumoperitoneum-induced renal alterations. The aim of this study was to evaluate the effects of enalaprilat (Vasotec) administration on renal function during CO2 pneumoperitoneum, given that this drug, which is an angiotensin-converting enzyme inhibitor, by inhibiting the renin-angiotensin-aldosterone system, alters hormone-induced changes during pneumoperitoneum.
Materials And Methods: Thirty adult dogs were randomly assigned to one of three groups (N = 10 each): group A (pneumoperitoneum not performed); group B (CO2 + enalaprilat); group C CO2 only.
Background: The use of circular staplers in the treatment of hemorrhoidal disease is known as a simple procedure, with low morbidity, less post-treatment pain and with the same efficacy when compared to the classical hemorrhoidectomy.
Aim: Analyze the operative technique, intra-operative and immediate postoperative complications and late results in 100 patients treated for hemorrhoid disease by stapling technique.
Patients And Methods: The group included 53 males and 47 females with mean age of 49.