170 research outputs found

    Comprender los factores clave para crear una marca de medios de comunicación

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    The purpose of the present research is to answer the question of what factors influence building a brand for news media. To answer the question, we used the meta-synthesis method. The statistical population of this research is qualitative articles that have been published on the media brand, in particular, the news media brand, between 2000 and 2017. Using content analysis, a total of 87 codes, 18 concepts and 5 categories for the brand of news media were discovered and labeled. Findings showed that the elements of the organization, message, communication, audience, and values are used in creating a brand for news media.El propósito de la presente investigación es responder a la pregunta de qué factores influyen en la construcción de una marca para los medios de comunicación. Para responder a la pregunta, utilizamos el método de meta-síntesis. La población estadística de esta investigación son los artículos cualitativos que se han publicado sobre la marca de medios, en particular, la marca de medios de comunicación, entre 2000 y 2017. Utilizando el análisis de contenido, un total de 87 códigos, 18 conceptos y 5 categorías para la marca de los medios de comunicación fueron descubiertos y etiquetados. Los resultados mostraron que los elementos de la organización, el mensaje, la comunicación, la audiencia y los valores se utilizan para crear una marca para los medios de comunicación

    Size Controlled Synthesis of FeCo Alloy Nanoparticles and Study of the Particle Size and Distribution Effects on Magnetic Properties

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    In this research the size controlled synthesis of FeCo nanoparticles was done using a quaternary microemulsion system. X-ray diffraction and high resolution transmission electron microscopy of as-synthesized nanoparticles confirm the formation of FeCo alloy nanoparticles. The effects of two process parameters, namely, water to surfactant molar ratio and molar concentration of metal salts, on the size and size distribution of nanoparticles were discussed by the aid of transmission electron microscopy. The size dependency of magnetic properties was also investigated using a room temperature vibrating sample magnetometer. The superparamagnetic-ferromagnetic and single domain-multidomain transition sizes were determined. Then the specific absorption rates at transition sizes were calculated and the best sample for magnetic hyperthermia treatment was introduced

    Validation and reliability evaluation of the author's identity scale

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    Objective: Adherence to scientific ethics is possible through learning and understanding the norms and internalizing the principles of writing. Something that can be called author identification. Cheung et al. Have developed a scale by understanding the need to explain and measure this concept. The current study was done in order to evaluate and validate the author's identity scale. Methodology: The present study was conducted by using a correlational design in which the method of covariance matrix was used for the purpose of confirmatory factor analysis. the population under study consisted of all masters and Ph.D. students of Mohaghegh Ardebili university and a number of 384 people were chosen using the Stratified Random Sampling method. Findings: the survey determining the content and construct validity confirmed the validity of the questionnaire. Cronbach’s alpha coefficient for the reliability of the author’s indentity questionnaire was 0.86, and using the half-split method it was calculated to be 0.75. Confirmatory Factor Analysis, similar to the main form, confirmed the three factors of awareness in writing, writer’s comprehension and sufficient knowledge to prevent plagiarism. According to the results, we can say that identity questionnaire is a reliable and valid tool to assess the identity of writers and university researchers. Originality: This study is the first study to examine the technical characteristics of the scale that can measure the perceptions and attitudes of students and academic researchers about the identification of the authors

    Langerhans' cell histiocytosis with multiple radiolucent lesions in the body of the mandible,report of a case

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    Introduction: Langerhans cell histiocytosis (LCH) refers to a group of rare reticuloendothelial system disorders and it occurs most often in young adults and children. A 57-year-old edentulous female patient who complained of dull pain in the posterior region of the mandible referred to the dental office, with a complaint of dull pain in the posterior region of the mandible. The lesion was diagnosed as LCH. Oral manifestations could be the first signs of Langerhans' cell histiocytosis. Therefore, the dentist must be aware of the oral symptoms so in order that the disease is not overlooked

    Higher Absolute Lymphocyte Counts Predict Lower Mortality from Early-Stage Triple-Negative Breast Cancer

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    Purpose: Tumor-infiltrating lymphocytes (TIL) in pretreatment biopsies are associated with improved survival in triple-negative breast cancer (TNBC). We investigated whether higher peripheral lymphocyte counts are associated with lower breast cancer–specific mortality (BCM) and overall mortality (OM) in TNBC. Experimental Design: Data on treatments and diagnostic tests from electronic medical records of two health care systems were linked with demographic, clinical, pathologic, and mortality data from the California Cancer Registry. Multivariable regression models adjusted for age, race/ethnicity, socioeconomic status, cancer stage, grade, neoadjuvant/adjuvant chemotherapy use, radiotherapy use, and germline BRCA1/2 mutations were used to evaluate associations between absolute lymphocyte count (ALC), BCM, and OM. For a subgroup with TIL data available, we explored the relationship between TILs and peripheral lymphocyte counts. Results: A total of 1,463 stage I–III TNBC patients were diagnosed from 2000 to 2014; 1,113 (76%) received neoadjuvant/adjuvant chemotherapy within 1 year of diagnosis. Of 759 patients with available ALC data, 481 (63.4%) were ever lymphopenic (minimum ALC <1.0 K/μL). On multivariable analysis, higher minimum ALC, but not absolute neutrophil count, predicted lower OM [HR = 0.23; 95% confidence interval (CI), 0.16–0.35] and BCM (HR = 0.19; CI, 0.11–0.34). Five-year probability of BCM was 15% for patients who were ever lymphopenic versus 4% for those who were not. An exploratory analysis (n = 70) showed a significant association between TILs and higher peripheral lymphocyte counts during neoadjuvant chemotherapy. Conclusions: Higher peripheral lymphocyte counts predicted lower mortality from early-stage, potentially curable TNBC, suggesting that immune function may enhance the effectiveness of early TNBC treatment

    Prolyl-4-hydroxylase Α subunit 2 (P4HA2) expression is a predictor of poor outcome in breast ductal carcinoma in situ (DCIS)

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    © 2018, Cancer Research UK. Background: Extracellular matrix (ECM) plays a crucial role in tumour behaviour. Prolyl-4-hydroxlase-A2 (P4HA2) is a key enzyme in ECM remodelling. This study aims to evaluate the prognostic significance of P4HA2 in breast ductal carcinoma in situ (DCIS). Methods: P4HA2 expression was assessed immunohistochemically in malignant cells and surrounding stroma of a large DCIS cohort comprising 481 pure DCIS and 196 mixed DCIS and invasive carcinomas. Outcome analysis was evaluated using local recurrence free interval (LRFI). Results: High P4HA2 expression was detected in malignant cells of half of pure DCIS whereas its expression in stroma was seen in 25% of cases. Higher P4HA2 expression was observed in mixed DCIS cases compared to pure DCIS both in tumour cells and in stroma. High P4HA2 was associated with features of high risk DCIS including younger age, higher grade, comedo necrosis, triple negative and HER2-positive phenotypes. Interaction between P4HA2 and radiotherapy was also observed regarding the outcome. High P4HA2 expression was an independent prognostic factor in predicting shorter LRFI. Conclusion: P4HA2 plays a role in DCIS progression and can potentially be used to predict DCIS outcome. Incorporation of P4HA2 with other clinicopathological parameters could refine DCIS risk stratification that can potentially guide management decisions

    Epidemiological Aspects of Renal Impairment in Patients with Type 2 Diabetes

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    Diabetes is a leading cause of renal impairment (RI) and indication of the need for renal replacement therapy in many parts of the world. Albuminuria and RI are the two main forms of diabetic kidney disease. The overall aims of this thesis were to explore risk factors and consequences associated with albuminuria and RI in patients with type 2 diabetes (T2D), as well as to assess the relationship between blood pressure variables, cardiovascular events and all-cause mortality. The studies were based on data from the Swedish National Diabetes Register (NDR). Study I followed 3,367 patients with T2D who did not exhibit signs of albuminuria or RI from 2002 to 2007 in order to evaluate the risk of developing them. A total of 20% of patients developed albuminuria and 11% developed RI. Among those with one of the two conditions, 62% had normoalbuminuric RI. Development of albuminuria or RI was independently associated with advanced older age, high systolic blood pressure and elevated triglycerides. The independent risk factors were obesity, poor glycemic control, smoking, low HDL- cholesterol and male gender for developing albuminuria, as opposed to elevated plasma creatinine at baseline and female gender for developing RI. Different sets of risk factors were associated with development of the two conditionsRI and albuminuria. High body mass index (BMI) was an independent risk factor for RI when renal function was calculated with the MDRD equation, while low BMI was a risk factor with when the Cockcroft-Gault equation was used. In other words, the equation chosen to estimate renal function is important in when interpreting data. Thus, patients with T2D face have distinct risk factors for albuminuria and RI. Study II included 94,446 patients with T2D, including 19,330 with RI. The majority with T2D and RI were normoalbuminuric. Normoalbuminuric RI may be partly due to treatment with RAAS blockade. Given, however, that only 25% of the patients with normoalbuminuric renal impairment had received RAAS blockade, the possibility that other underlying pathophysiological mechanisms play a role should be further evaluated. Study III followed 33,356, and Study IV 27,732, patients with T2D and RI in 2005-2011 in order to evaluate correlations associations between systolic blood pressure (SBP) and all-cause mortality. We observed U-shaped relationships between various aspects of SBP and the risk of all-cause mortality. The greatest risks for Cardiovascular events (CVEs) and all-cause mortality were at the highest and lowest blood pressure intervals. SBP of 135-139 and diastolic blood pressure (DBP) of 72-74 mmHg showed the lowest risks of CVEs and all-cause mortality. Adjusting for presence of albuminuria or chronic heart failure did not significantly alter the results. A reduction in SBP during follow-up is was associated with a greater risk of all-cause mortality. In summary, this thesis shows that obesity and other traditional cardiovascular risk factors are associated with development of albuminuria and RI in patients with T2D. We also found that normoalbuminuric RI is common in patientsly associated with T2D. Finally, both the highest and lowest blood pressure intervals are associated with greater risks of cardiovascular events and all-cause mortality
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