943 research outputs found

    Facebook’s Anticompetitive Lean in Strategies

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    Facebook is under fire on several fronts and with good reason. Regulators strive to make sense of and address a plethora of seemingly unrelated issues that arise from the operation of its platform. These range from antitrust, privacy violations, dissemination of harmful content and speech, deception and polarisation to political manipulation. This paper identifies Facebook’s unrestricted and excessive data collection as a unifying theme that requires immediate antitrust action. Once a privacy-oriented social network, Facebook soon mutated into a surveillance machine designed to hoover people’s personal data to identify and understand people’s interests, preferences and emotions and turn that knowledge into profit through the sale of targeted ads. Since people’s innate preference for privacy stood in the way of Facebook’s growth, Facebook resorted to privacy intrusions and deception to access as much user data as possible, thereby gaining market power. Currently, its overwhelming dominant position in the social media market means that no matter how much data Facebook extracts from users, how transparent its information about its data processing practices is and how many privacy scandals ensue from its reckless handling of data, users have nowhere else to go. This paper provides a course of action to correct this unacceptable anticompetitive outcome. The imposition of unfair commercial terms on consumers, the distortion of the competitive process through privacy violations and misleading practices, the squeezing of news publishers’ traffic and foreclosure of actual and potential competitors by Facebook, can be stopped. A combination of data and consumer protection measures alone cannot stop Facebook’s actions, but antitrust enforcement can be used to curb Facebook’s ability to reinforce its data-driven abuse of its market power

    Significado de la anemia en las diferentes etapas de la vida

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    Overview: Anemia is very common in primary care consultations and pediatrics, and IDA is the cause of 50% of all cases of anemia. Methodology: Literature review and documentary descriptive analysis of the pathogenesis of iron-deficiency anemia, the basic diagnostic tests to study IDA and the significance of such using a specific time period in the documentary search and inclusion criteria that takes into account factors that are analyzed in the study: Ideas about the metabolism of iron. Ideas about hematopoiesis. Laboratory diagnosis and classification of anemia. Clinical features of iron deficiency anemia. Causes of iron deficiency. Results and conclusion: The staged documentary study covers the publications on the pathogenesis of iron deficiency anemia, the basic diagnostic tests to study the IDA and the significance of such, and it shows how important this data is for professional nursing in the area of primary care and pediatrics, to identify it and act accordingly.Resumen: La anemia presenta una elevada prevalencia en las consultas de atención primaria y pediatría, y la ADH representa el 50% de todos los casos de anemia. Metodología: Revisión bibliográfica y análisis descriptivo documental sobre etiopatogenia de la anemia ferropénica, las pruebas diagnósticas básicas para el estudio de la ADH  y su significado, utilizando una temporalidad determinada en la búsqueda documental y criterios de inclusión atendiendo a las dimensiones que se analizan en el estudio: Nociones acerca del metabolismo del hierro. Nociones acerca de la hematopoyesis. Diagnóstico por el laboratorio y clasificación de las anemias. Clínica de la anemia ferropénica. Causas de la deficiencia de hierro. Resultados y conclusión: EL estudio documental efectuado nos presenta la existencia de publicaciones con contenidos sobre etiopatogenia de la anemia ferropénica, las pruebas diagnósticas básicas para el estudio de la ADH  y su significado, evidenciando la importancia de este contenido para el profesional de enfermería en el área de la atención primaria y pediatría

    Suitability Testing for PoSSUM Scientist-Astronaut Candidates using the Suborbital Space Flight Simulator with an IVA Spacesuit

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    This paper evaluates key functional data parameters that must be considered for suborbital spaceflight participants wearing pressurized suits for intravehicular activity (IVA). Data parameters of an analog spacesuit worn in an analog flight environment were obtained from 40 civilian participants using the Suborbital Space Flight Simulator (SSFS) at Embry-Riddle Aeronautical University (ERAU) while donning Final Frontier Design’s (FFD) fully pressurized third-generation spacesuit as part of their training for Project PoSSUM (the Polar Suborbital Science in the Upper Mesosphere Project). The physiological data collected included: blood pressure, electrocardiograms, heart rate, grip strength, and skin temperature. These parameters were measured using a blood pressure monitor, a Zephyr Bioharness, and a BioRadio respectively. Other data collected include participants’ motion sickness, discomfort and mobility, and stress and workload. These parameters were self-assessed using the Simulator Sickness Questionnaire (SSQ), the Modified Cooper Harper Rating Scale, and the NASA-Task Load Index (TLX) respectively. Preliminary results show that 29% of the participants experienced basic spacesuit donning discomfort, while 17% of the participants showed some doffing discomfort. Feet, shoulders, neck, arms, and ankles were the most sensitive parts in this process and throughout their use of the suit. Our results also indicate that the spacesuit limited participants by approximately 24% of their normal cross-body reach range of motion. Nevertheless, the operational capability of this suit is currently being evaluated as a viable option for supporting future suborbital, orbital, and exploration missions. This research will enhance the functionality of the suit, standardize suit testing procedures, aid in identifying key parameters for reducing physiological deconditioning in the use of emerging spacesuit technologies, and provide comparative analysis reference for future studies

    Suitability Testing for PoSSUM Scientist-Astronaut Candidates Using the Suborbital Space Flight Simulator with an IVA Spacesuit

    Get PDF
    This paper evaluates key functional data parameters that must be considered for suborbital spaceflight participants wearing pressurized suits for intravehicular activity (IVA). Data parameters of an analog spacesuit worn in an analog flight environment were obtained from 40 civilian participants using the Suborbital Space Flight Simulator (SSFS) at Embry-Riddle Aeronautical University (ERAU) while donning Final Frontier Design’s (FFD) fully pressurized third-generation spacesuit as part of their training for Project PoSSUM (the Polar Suborbital Science in the Upper Mesosphere Project). The physiological data collected included: blood pressure, electrocardiograms, heart rate, grip strength, and skin temperature. These parameters were measured using a blood pressure monitor, a Zephyr Bioharness, and a BioRadio respectively. Other data collected include participants’ motion sickness, discomfort and mobility, and stress and workload. These parameters were self-assessed using the Simulator Sickness Questionnaire (SSQ), the Modified Cooper Harper Rating Scale, and the NASA-Task Load Index (TLX) respectively. Preliminary results show that 29% of the participants experienced basic spacesuit donning discomfort, while 17% of the participants showed some doffing discomfort. Feet, shoulders, neck, arms, and ankles were the most sensitive parts in this process and throughout their use of the suit. Our results also indicate that the spacesuit limited participants by approximately 24% of their normal cross-body reach range of motion. Nevertheless, the operational capability of this suit is currently being evaluated as a viable option for supporting future suborbital, orbital, and exploration missions. This research will enhance the functionality of the suit, standardize suit testing procedures, aid in identifying key parameters for reducing physiological deconditioning in the use of emerging spacesuit technologies, and provide comparative analysis reference for future studies

    Efecto de la densidad de siembra sobre el rendimiento de la okra (Abelmoschus esculentus (L.) Moench), en el valle de Lerma, Salta, Argentina

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    La okra es una malvácea anual cultivada como hortaliza adaptada a climas tropicales y subtropicales. El manejo del cultivo es poco conocido en Salta y Argentina. El objetivo fue determinar la densidad de siembra más adecuada en el valle de Lerma evaluando su efecto sobre las componentes del rendimiento. Con un diseño de bloques completos al azar, con 12 réplicas, se compararon cuatro densidades de siembra de okra variedad Blue Sky que fueron 1, 2, 3 y 4 plantas por pozo, (T1, T2, T3 y T4), con filas a 70 cm y hoyos a 30 cm. Se sembró el 25/10/11 y la emergencia fue a los 21 días. Se cosecharon frutos inmaduros entre el 23/12/11 y el 28/03/12, con un tamaño entre 7-10 cm de largo. Se evaluó el nú- mero y peso total de frutos cosechados en todo el ciclo de producción y por fecha de cosecha. Para todas las variables analizadas, los menores valores promedio se observaron en T1, mientras que entre T2, T3 y T4, si bien se vio una tendencia en aumento, no existieron diferencias estadísticamente significativas. Por consiguiente y debido a la dificultad de conseguir la semilla en el país y por su alto costo, se recomienda sembrar dos semillas por pozo.Okra is an annual Malvaceae cultivated as a vegetable crop and adapted to tropical and subtropical climate. There is no much crop management information in Salta and Argentina. The goal of this research was to determine the best plant density in the Lerma valley, Salta, Argentina. Treatments were four okra plant populations, cultivar Blue Sky (1, 2, 3 and 4 plants per hill: T1, T2, T3 y T4) evaluating its effect on the yield components. Experimental design was a randomized complete block with 12 blocks. The experiment was sown on October 25, 2011 and seed emergency happen 21 days after sowing. Fruits were harvested at immature stage from 23/12/11 to 28/03/12, with a size length from 7 to 10 cm. The parameters measured were: number and total fruit weight harvested in the whole production cycle and for each harvest date. For all parameters analyzed, the lower average values were observed in T1, but there were not statiscally differences between T2, T3 and T4. Nevertheless, there was a growing trend, although not statistically significant. It is recommended to plant two seeds per well (8 plants·m-2), because off the seed costs and for the difficulty of getting them in the Argentina.Fil: Lozano, L.. Universidad Nacional de Salta. Facultad de Ciencias Naturales; ArgentinaFil: Tálamo, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Bio y Geociencias del Noroeste Argentino; Argentina. Universidad Nacional de Salta; ArgentinaFil: Galarce, M.. Universidad Nacional de Salta. Facultad de Ciencias Naturales; ArgentinaFil: Ruiz de los Llanos, R.. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentin

    Control of mucocutaneous leishmaniasis, a neglected disease: results of a control programme in Satipo Province, Peru.

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    Mucocutaneous leishmaniasis (MCL) is an important health problem in many rural areas of Latin America, but there are few data on the results of programmatic approaches to control the disease. We report the results of a control programme in San Martin de Pangoa District, which reports one of the highest prevalences of MCL in Peru. For 2 years (2001--2002), the technicians at the health post were trained in patient case management, received medical support and were supplied with antimonials. An evaluation after 2 years showed the following main achievements: better diagnosis of patients, who were confirmed by microscopy in 34% (82/240) of the cases in 2001 and 60% of the cases (153/254) in 2002; improved follow-up during treatment: 237 of 263 (90%) patients who initiated an antimonial therapy ended the full treatment course; improved follow-up after treatment: 143 of 237 (60%) patients who ended their full treatment were correctly monitored during the required period of 6 (cutaneous cases) or 12 (mucosal cases) months after the end of treatment. These achievements were largely due to the human and logistical resources made available, the constant availability of medications and the close collaboration between the Ministry of Health, a national research institute and an international non-governmental organization. At the end of this period, the health authorities decided to register a generic brand of sodium stibogluconate, which is now in use. This should allow the treatment of a significant number of additional patients, while saving money to invest in other facets of the case management

    Musical revitalisation of the schoolyard: results of a service-learning project

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    This research presents and discusses the results of a Service-Learning project developed by student teachers of Primary Education at the University of Valladolid during the academic years 2016/17, 2017/18, 2018/19, and 2019/20. The project aimed to revitalize recess through musical activities for children aged 6 to 12 in seven schools in Segovia (Spain). The results of the qualitative analysis show that the project has promoted the musical development of the children through singing, the experience of rhythm, and expression through movement, using a selected repertoire of popular children folk songs. In the university students, it helped foster commitment to primary school students through the promotion of co-education and socio-cultural diversity—values which have fostered the development of social and civic competences. The student teachers also achieved professional growth by obtaining through this project skills typical of Music Education teachers

    Advancing Health Policy and Advocacy Education in Medical School through a Student-run Elective

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    Introduction: Training medical students in the policy topics of healthcare economics, delivery systems, disparities, and reform helps to prepare them for the growing role of advocacy in medicine. We used a near-peer educational model to create an elective to advance learners’ policy knowledge and advocacy skills, while simultaneously offering student directors hands-on experience in educational program development. Methods: The 4-week elective for fourth year medical students included weekly readings, policy seminars, advocacy workshops, and journal clubs. Longitudinally, students prepared for a policy debate and prepared a research project or Op-Ed article on a healthcare disparity topic of their choice. The elective was designed, coordinated, and implemented by a team of first, second, third, and fourth-year medical students with faculty adviser oversight. Pre- and post-surveys were utilized to assess student learners’ knowledge of subject material and their perceptions of the effectiveness of the curriculum. Student directors self-assessed their confidence with the subject material and acquired skill in educational program development. Results: Student learners (n=6) noted significant improvement in their knowledge of health policy (P=0.0002) and advocacy (P=0.0064). They also reported improvement in several subtopics under policy and advocacy, with significant improvements seen in healthcare reform (P=0.0131) and writing skills (P=0.0099). Student directors (n=4) reported improved skills in curriculum development, educational evaluation, and leadership. Discussion: This novel student-run elective provided effective training in health policy and advocacy that extends beyond traditional curricula in medical school. Employing a near-peer model, the elective offers a sustainable system to educate interested students in these subjects and provide student directors unique experience in medical education. Further evaluation of future iterations will help determine the effectiveness of the curriculum in advancing individual policy and advocacy subtopics to guide future curricular modifications

    Influence of temperament on performance and carcass quality of commercial Brahman steers in a Colombian tropical grazing system

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    Temperament is defined as individual behavioral responses to potentially fear-eliciting or challenging situations related to human presence and handling. A total of 190 steers of commercial Zebu Brahman (Bos indicus) were used in this study, selected when they were between 10 and 11 months of age, fattened for 24 months (720 days) and slaughtered between 34 and 35 months of age. Using a temperament index (based on two tests: chute and exit score), animals were classified as calm, restless, or nervous. In general, calm animals had a longer carcass, a higher slaughter and fasting weight, and a normal pH24 (<5.7). However, carcass yield was significantly higher in nervous than in restless animals, but did not differ from that of calm steers. It is important to note that these results were obtained under experimental conditions, therefore, effects could have a greater impact on carcass quality under commercial conditions. © 2022 The Author

    Semivolatile Organic Compounds (SVOCs) in the atmosphere of Santiago de Cali, Valle del Cauca, Colombia along north-south transect using polyurethane foam disk as passive air samplers

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    A preliminary evaluation of Semivolatile Organic Compounds (SVOCs) was performed in the atmosphere of Santiago de Cali, Colombia, using passive air samplers based polyurethane foam (PAS-PUF) disks. PASPUF were deployed in four sites, along a north-south transect(similar to 15 km), during one sampling period of similar to 4 months in 2011, form the industrial area of Yumbo (EF site) to the agricultural area of Valle del Cauca (FCNE). Results showed, for PCBs and PAHs, a clear north-south (IN > AG) decreasing concentration gradient (similar to 3 times) while OCPs exhibited an opposite gradient (UR < AG). Endosulfan I showed the highest concentrations in air (similar to 0.8-60 ng m(-3)). The HCHs (alpha- and gamma-) concentrations ranged from BDL to similar to 19 ng m(-3), with a-HCH showing the highest levels (suggesting recent use of technical HCHs) and for DDTs levels fluctuated from BDL to similar to 29 ng m(-3) (with p, p'-DDE accounting for 50-80% of total DDTs). PAHs levels (similar to 25-66 ng m(-3)) were characterized by the abundance of Phenanthrene (34%), fluoranthene (18%) and pyrene (16%). For PCBs, concentrations in air ranged from similar to 0.2 to 0.9 ng m(-3) and were characterized by middle to a higher molecular weight PCB composition pattern. The results of OCPs are much higher than those found in other areas of Latin America. These results are likely influenced by the proximity of agricultural cultivations (i.e., sugarcane crops) in the southern part of the city. These results provide preliminary information about the presence of SVOCs in the atmosphere of Santiago de Cali, and constitute the basis for future monitoring programs. Copyright (C) (C) 2016 Turkish National Committee for Air Pollution Research and Control. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license
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