On the maximum rank of a real binary form

We show that a real homogeneous polynomial f(x,y) with distinct roots and degree d greater or equal than 3 has d real roots if and only if for any (a,b) not equal to (0,0) the polynomial af_x+bf_y has d-1 real roots. This answers to a question posed by P. Comon and G. Ottaviani, and shows that the interior part of the locus of degree d binary real binary forms of rank equal to d is given exactly by the forms with d real roots.Comment: To appear in Annali di Matematica Pura ed Applicat

Policies and Education in Latin America : From the 'competitive quality' to 'quality for the generation of bicentenary'

En América Latina la injerencia de los organismos internacionales en la política nacional constituye un fenómeno que no se puede soslayar. Se trata de una cuestión candente en el contexto actual y remite a la presencia creciente en los países de la región de una serie de papers, documentos, boletines que, generados en el seno de dichas entidades, señalan desafíos presentes y futuros que deberá atender América Latina. En el campo educativo, marcan las orientaciones de política para la región y representan discursos sobre la educación que es menester analizar críticamente. El objetivo de este trabajo es analizar una serie de ideas, recomendaciones y retóricas político-pedagógicas de los Organismos Internacionales respecto de la denominada calidad de la educación en América Latina con la intención de poner de manifiesto su productividad discursiva en tanto su incidencia está ligada a significantes que operan ordenando las disputas político-discursivas del campo educativoIn Latin America the interference of the international organisms in national politics is a phenomenon can not be ignored. This is a hot issue in the current context and refers to the growing presence countries in the region of a series of papers, documents, newsletters generated within those entities; identify challenges and future that should address Latin America. In education, mark the policy guidelines for the region and represent discourses on education that is necessary to analyze critically. The aim of this paper is to analyze a series of ideas, recommendations and political educational rhetoric of international organizations for educational quality in Latin America with the intention of highlighting their discursive productivity while its incidence is linked to significant operating ordering political disputes discursive field of educationFil: Causa, Matías. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina

Magnetic polarons in Ca_(1-x)Y_xMnO_3

Experimental evidence show that in the magnetoresistive manganite Ca_(1-x) Y_xMnO_3, ferromagnetic (FM) polarons arises in an antiferromagnetic (AF) background, as a result of the doping with Yttrium. This hypothesis is supported in this work by classical Monte Carlo (MC) calculations performed on a model where FM Double Exchange (DE) and AF Superexhange (SE) compite.Comment: 3 pages, 3 figs, submitted to LAW3M conferenc

Improving Diabetic Foot Screening in a Primary Care Clinic for Homeless Adults: A Quality Improvement Project

The purpose of this project was to increase the adherence of clinic providers at the homeless primary care clinic by implementing the American Diabetes Association Clinical Guidelines for the evaluation and management of Type 2 diabetes with foot care. Type 2 diabetes is a chronic condition that affects 13% of the Texas adult population (Centers for Disease Control and Prevention, 2014). The homeless person\u27s main method of transportation is walking. The complications of undiagnosed foot problems include reduced mobility, pain, lower limb amputations, and difficulty controlling chronic diseases including diabetes and depression. Provider responsibilities include screening for diabetes in all patients over the age of 18, documenting positive diagnosis in the electronic medical record, screening patients with diabetes for foot problems with appropriate screening tools and appropriate referral to podiatry. A retrospective chart review was conducted where 35 patient charts were reviewed and de-identified. The pre- and post interventions were analyzed. At project completion, high no-show rates among patients for appointments and the short project duration were major limitations of the project. The interventions implemented were helpful in increasing provider documentation of the patients that did show up. Homeless people are exposed to the elements adding to their daily struggles, which indicate a need for continuous work on intervention models that will facilitate provider adherence with subsequent referral for treatment if needed

Improving Navigation in GNSS-challenging Environments: Multi-UAS Cooperation and Generalized Dilution of Precision

This paper presents an approach to tackle navigation challenges for Unmanned Aircraft Systems flying under non nominal GNSS coverage. The concept used to improve navigation performance in these environments consists in using one or more cooperative platforms and relative sensing measurements (based on vision and/or ranging) to the navigation aid. The paper details the cooperative navigation filter which can exploit multiple cooperative platforms and multiple relative measurements, while also using partial GNSS information. The achievable navigation accuracy can be predicted using the concept of "generalized dilution of precision", which derives from applying the idea of dilution of precision to the mathematical structure of the cooperative navigation filter. Values and trends of generalized dilution of precision are discussed as a function of the relative geometry in common GNSS-challenging scenarios. Finally, navigation performance is assessed based on simulations and on multi-drone flight tests

The Level of Handwashing Knowledge and Behavior of Yos Sudarso High School Medan Students' During The COVID-19 Pandemic

Background: The COVID-19 (Coronavirus Disease 2019) outbreak which was first detected in Wuhan, China, in December 2019, has spread rapidly. One way of preventing and controlling infection in the community is by washing hands thoroughly and regularly. The purpose of this study was to determine the level of handwashing knowledge and behavior of Yos Sudarso High School Medan students’ during the COVID-19 pandemic. Method: The design used was one group pretest-posttest design. The type of data is primary data obtained through online questionnaires using a total sampling technique. Results: Of the 76 respondents, the level of knowledge on handwashing was dominated by the low category, namely 65 people (85.5%) and the good category of handwashing behavior, namely 59 people (77.6%). After being given information, the level of the good knowledge was 35 people (46.1%) and the good behavior was 66 people (86.8%). Students have a low knowledge about handwashing but have a good handwashing intensity behavior during the COVID-19 pandemic. Conclusion: Given information, there is an increase on the level of handwashing knowledge and behavior of Yos Sudarso High School Medan students’ during the COVID-19 pandemic

Characteristics of Lung Cancer Patients in Haji Adam Malik General Hospital Medan in 2016-2018

Lung cancer is a malignant disease in the lung where abnormalities caused by collection of genetic changes in the epithelial cells of the airway, which lead to cell proliferation that cannot be controlled. This study was conducted to determine the characteristics of lung cancer patients in Haji Adam Malik General Hospital Medan in 2016-2018. This research is a descriptive study with a case series approach. The study population was 311 lung cancer patients using Total Sampling method. The tendency of inpatient lung cancer patients visiting H. Adam Malik General Hospital Medan in 2016-2018 has decreased. The highest proportion of patients with lung cancer based on sociodemography obtained 65-69 years old age group, men with 3: 1 sex ratio, work of farmers, living outside the city of Medan, the main complaint was more than one complaint, had a history of smoking, no pleural effusion occurred, the type of adenocarcinoma histology and the method of taking a cytological fluid specimen. There was a statistically significant relationship between age with sex, sex with occupation, sex with smoking history, occupation with primary complaints, occupation with smoking history, and histology type by specimen collection and there rest have no statistically significant difference

Evidence of strong antiferromagnetic coupling between localized and itinerant electrons in ferromagnetic Sr2FeMoO6

Magnetic dc susceptibility ($\chi$) and electron spin resonance (ESR) measurements in the paramagnetic regime, are presented. We found a Curie-Weiss (CW) behavior for $\chi$(T) with a ferromagnetic $\Theta = 446(5)$ K and $\mu_{eff} = 4.72(9) \mu_{B}/f.u.$, this being lower than that expected for either $Fe^{3+}(5.9\mu_{B})$ or $Fe^{2+}(4.9\mu_{B})$ ions. The ESR g-factor $g = 2.01(2)$, is associated with $Fe^{3+}$. We obtained an excellent description of the experiments in terms of two interacting sublattices: the localized $Fe^{3+}$ ($3d^{5}$) cores and the delocalized electrons. The coupled equations were solved in a mean-field approximation, assuming for the itinerant electrons a bare susceptibility independent on $T$. We obtained $\chi_{e}^{0} = 3.7$ $10^{-4}$ emu/mol. We show that the reduction of $\mu_{eff}$ for $Fe^{3+}$ arises from the strong antiferromagnetic (AFM) interaction between the two sublattices. At variance with classical ferrimagnets, we found that $\Theta$ is ferromagnetic. Within the same model, we show that the ESR spectrum can be described by Bloch-Hasegawa type equations. Bottleneck is evidenced by the absence of a $g$-shift. Surprisingly, as observed in CMR manganites, no narrowing effects of the ESR linewidth is detected in spite of the presence of the strong magnetic coupling. These results provide evidence that the magnetic order in $Sr_{2}FeMoO_{6}$ does not originates in superexchange interactions, but from a novel mechanism recently proposed for double perovskites