1,034 research outputs found

    Coping strategies to predict the psychological well-being of college students during the COVID-19 pandemic

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    The COVID-19 pandemic in Indonesia has forced college students to undergo online learning. Various problems that arise due to this pandemic, especially those related to academic achievement, can disrupt the students' psychological well-being. This study investigated coping strategies' role in predicting college students' psychological well-being during the pandemic's first wave. Two hundred eleven students participated online in this quantitative study and completed the shortened version of the Psychological Well-Being Scale and the Brief Cope Inventory. The regression analysis results show that problem-focused coping strategies, such as planning and the use of instrumental support, significantly predict the increase in female students' psychological well-being. In contrast, only active coping positively predicts psychological well-being in male students. Dysfunctional coping strategies, such as behavioral disengagement and denial, significantly predict the decline in female students' psychological well-being. On the other hand, venting showed a significant role in predicting the increased psychological well-being of female students. Emotion-focused coping strategies do not significantly predict psychological well-being in female and male students. Therefore, regarding the psychological well-being of college students during the first wave of the COVID-19 pandemic, coping strategies, especially problem-focused and dysfunctional strategies, contribute differently to female and male students

    Bi-color atomic beam slower and magnetic field compensation for ultracold gases

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    Transversely loaded bidimensional-magneto-optical-traps (2D-MOT) have been recently developed as high flux sources for cold strontium atoms to realize a new generation of compact experimental setups. Here, we discuss on the implementation of a cross-polarized bi-color slower for a strontium atomic beam improving the 2D-MOT loading, and increasing the number of atoms in a final MOT by eleven times. Our slowing scheme addresses simultaneously two excited Zeeman substates of the 88Sr 1S0->1P1 transition at 461 nm. We also realized a 3-axis active feedback control of the magnetic field down to the microgauss regime. Such a compensation is performed thanks to a network of eight magnetic field probes arranged in a cuboid configuration around the atomic cold sample, and a pair of coils in Helmholtz configuration along each of three Cartesian directions. Our active feedback is capable of efficiently suppressing most of the magnetically-induced position fluctuations of the 689~nm intercombination-line MOT.Comment: 8 pages, 6 figure

    Estado del arte de la investigación en emprendimiento empresarial en la Universidad Iberoamericana durante los años 2000 a 2004.

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    “ENTREPRENEURSHIP” traducido como espíritu empresarial tópico de alcance mundial, tema de estudios de la comunidad europea y norteamericana con teóricos como Schumpeter (1931) quien considerara la innovación y empresarismo como fuerzas conducentes al desarrollo económico,es en Ibereoamérica el sustento conceptual para impulsar el emprendimiento empresarial en la juventud universitaria. Esta Investigación identificó, analizó, y documentó las investigaciones realizadas por la Universidad Iberoamericana sobre emprendimiento empresarial en los años 2000 - 2004. Permitió identificar las investigaciones realizadas en torno al emprendimiento y al empresarismo, con el fin de establecer los tópicos en los que ella se ha desenvuelto en Ibereoamérica. Es una investigación teórica, documental elaborada a través de Internet. Los países fueron clasificados según afinidad cultural y geográfica; posteriormente se enviaron solicitudes de información mediante correo electrónico a 893 universidades iberoamericanas. Los hallazgos muestran pocas investigaciones realizadas sobre el tema; sólo en países del Cono Sur, España, Brasil y Portugal se registran investigaciones sobre emprendimiento y empresarismo, aunque la población objetivo de la búsqueda incluyo a todos los países de Iberoamérica. Las limitaciones hacen referencia a la incapacidad de dar cuenta del universo de lo que se ha investigado en un área, los inconvenientes al acceso del material documental para el análisis con el fin de avanzar en las metodologías, los métodos más empleados en las investigaciones y los enfoques de los temas. A pesar de no ser muy prolífica la investigación, sí permitió identificar líneas que en concepto de los investigadores, pueden ser prioritarias para la Institución, acorde con su carácter , misión y vocación universitaria  Abstract The “ENTREPRENEURSHIP” translated as an enterprising spirit, it was topic of studies of the European community and North American because theoretical as Schumpeter (1931) it considered the innovation and the enterprising like conducive forces to the economic development. This research analyzed. Identified and documented the accomplished investigations done by the Iberoamerican University about entrepreneurship between the years 2000 - 2004. It allowed to know the conceptual contributions on the topic, the predominant approaches, the methodologies and the employed procedures and the new problems. It is a theoretic and documental investigation, elaborated through Internet. The countries were classified according to their cultural and geographical affinity to collect and analyze the data. After that it was sent requests of information about the accomplished researches on entrepreneurship by e-mail to the 893 detected Iberoamerican universities. The discoveries show few investigations carried out in the topic; only in countries of the South Cone, Spain, Brazil and Portugal register investigations on entrepreneurship The limitations to obtain the information make reference to the inability to give account of everything investigated in an specific area, and to the obstacles to accede to the documental material to the analysis. In spite of not being very prolific the investigation on the theme, It allows to identify lines of research and propose ones that in some researches’ point of view, can be priorities to the Institution, in accord to its university character, mission and vocation

    Nuclear spin conversion of water inside fullerene cages detected by low-temperature nuclear magnetic resonance

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    The water-endofullerene H2O@C60 provides a unique chemical system in which freely rotating water molecules are confined inside homogeneous and symmetrical carbon cages. The spin conversion between the ortho and para species of the endohedral H2O was studied in the solid phase by low-temperature nuclear magnetic resonance. The experimental data are consistent with a second-order kinetics, indicating a bimolecular spin conversion process. Numerical simulations suggest the simultaneous presence of a spin di↵usion process allowing neighbouring ortho and para molecules to exchange their angular momenta. Cross-polarization experiments found no evidence that the spin conversion of the endohedral H2O molecules is catalysed by 13C nuclei present in the cages

    Bioarchaeological analysis of Castelsardo’s Mummies

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    In the early months of 2011, during the restoration of Sant’Antonio Abate’s Cathedral in Castelsardo came to light environments remained hidden so far, which aroused considerable interest both for the archaeological and anthropological point of view for the discovery of a cemetery crypt with numerous human remains dating from the eighteenth to nineteenth century. Archaeological investigations took place at different times and in different ways during the months of January to April of 2011, which allowed to detect a burial site, with a great number of individuals organized in several layers piled up at the bottom of the crypt, and to define some stages in the building of the church, mainly in its monumental transition from Romanesque structure to new cathedral seat of the diocese. Eighteen individuals of both sexes, were finally identified at different levels, including 16 partially mummified and 2 almost entirelly mummified deposited on a sort of open plank, that, from the archeological point of view, represented the crypt closing point. The found remains were studied in order to obtain interesting bioarchaeological information determining some peculiar characteristics regarding the medical and the scientific aspects, more precisely age of death, sex, stature in life, pathological conditions, and to evaluate the state of conservation of mummified tissues, describing the morphological characteristics by histological, immunohistochemical and ultrastructural techniques

    Fast Molecular Compression by a Hyperthermal Collision Gives Bond-Selective Mechanochemistry

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    Using electrospray ion beam deposition, we collide the complex molecule Reichardt’s Dye (C41H30NO+) at low, hyperthermal translational energy (2 - 50 eV) with a Cu(100) surface and image the outcome at single-molecule level by scanning tunneling microscopy. We observe bond-selective reaction induced by the translational kinetic energy. The collision impulse compresses the molecule and bends specific bonds, prompting them to react selectively. This dynamics drives the system to seek thermally inaccessible reactive pathways, since the compression timescale (sub-ps) is much shorter than the thermalization timescale (ns), thereby yielding reaction products that are unobtainable thermally

    Performance analysis of existing catfish and tilapia value chains and market systems in Nigeria: A post-farmgate value chain scoping study

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    Nigeria is the largest fish producer in Sub-Saharan Africa. Fish plays a crucial role in supporting the livelihoods of fish producers and actors along the post-farmgate value chain in the country. Despite the virtues of the aquaculture and fisheries subsectors to enhance the livelihoods of value chain actors, major gaps exist related to efficiencies of the fish value chain. These gaps include the financial performance of post-farmgate actors, gender-disaggregated data on value chain actors, the roles of women and youths in fish trade, and post-farmgate food safety practices. The aim of this study is to fill the data gap in the post-farmgate fish value chain to provide evidence-based policy suggestions to enhance the aquaculture subsector in Nigeria. Using primary data, our study provides evidence on the economic, environmental, social, nutritional and food safety performance of the post-farmgate fish value chain. Our study finds that, in general, fish value chains are economically viable (profitable) and inclusive, as women and youths own over half of post-farmgate value chain activities. These results are of interest to both private and public sector decision-makers and policymakers because they provide quantitative data on value creation (fish sales, employment, service provision), social performance (women and youth empowerment), and environmental, nutritional and food safety challenges along fish value chains

    Mesothelioma and Radical Surgery 2 (MARS 2): protocol for a multicentre randomised trial comparing (extended) pleurectomy decortication versus no (extended) pleurectomy decortication for patients with malignant pleural mesothelioma.

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    INTRODUCTION: Mesothelioma remains a lethal cancer. To date, systemic therapy with pemetrexed and a platinum drug remains the only licensed standard of care. As the median survival for patients with mesothelioma is 12.1 months, surgery is an important consideration to improve survival and/or quality of life. Currently, only two surgical trials have been performed which found that neither extensive (extra-pleural pneumonectomy) or limited (partial pleurectomy) surgery improved survival (although there was some evidence of improved quality of life). Therefore, clinicians are now looking to evaluate pleurectomy decortication, the only radical treatment option left. METHODS AND ANALYSIS: The MARS 2 study is a UK multicentre open parallel group randomised controlled trial comparing the effectiveness and cost-effectiveness of surgery-(extended) pleurectomy decortication-versus no surgery for the treatment of pleural mesothelioma. The study will test the hypothesis that surgery and chemotherapy is superior to chemotherapy alone with respect to overall survival. Secondary outcomes include health-related quality of life, progression-free survival, measures of safety (adverse events) and resource use to 2 years. The QuinteT Recruitment Intervention is integrated into the trial to optimise recruitment. ETHICS AND DISSEMINATION: Research ethics approval was granted by London - Camberwell St. Giles Research Ethics Committee (reference 13/LO/1481) on 7 November 2013. We will submit the results for publication in a peer-reviewed journal. TRIAL REGISTRATION NUMBERS: ISRCTN-ISRCTN44351742 and ClinicalTrials.gov-NCT02040272

    Embellecimiento de Áreas en la Comunidad universitaria

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    La Universidad Santo Domingo de Guzmán necesita la construcción de espacios de esparcimiento para el uso recreacional y la práctica ambiental, que conllevan a un cambio de actitud positiva en los estudiantes de la misma, tanto hacia los otros, como hacia el entorno en el cual interactúan. En ese sentido los estudiantes del II ciclo educación inicial se han propuesto este título “Embellecimiento de zonas de la comunidad universitaria” Santo Domingo de Guzmán período 2018- II. Actualmente a nivel mundial la importancia en el cuidado del medio ambiente es más fundamental dado a los grandes impactos que hoy día vivimos por los malos hábitos al disponer de los recursos que la naturaleza nos brinda. Nuestro objetivo es embellecer las zonas de la universidad Santo Domingo de Guzmán de Guzmán y fomentar en los estudiantes la necesidad de desarrollar las actividades ecológicas, que contienen a la formación de una cultura ambienta

    Effects of antiplatelet therapy on stroke risk by brain imaging features of intracerebral haemorrhage and cerebral small vessel diseases: subgroup analyses of the RESTART randomised, open-label trial

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    Background Findings from the RESTART trial suggest that starting antiplatelet therapy might reduce the risk of recurrent symptomatic intracerebral haemorrhage compared with avoiding antiplatelet therapy. Brain imaging features of intracerebral haemorrhage and cerebral small vessel diseases (such as cerebral microbleeds) are associated with greater risks of recurrent intracerebral haemorrhage. We did subgroup analyses of the RESTART trial to explore whether these brain imaging features modify the effects of antiplatelet therapy
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