874 research outputs found
Diseño de un aerogenerador vertical savonious-curvados para ensayos experimentales con velocidades de 4 m/s a 8 m/s
No full textLa energía eólica en el Perú emplea en un 100% aerogeneradores de eje horizontal para la generación de energía eléctrica. El uso de aerogeneradores de eje vertical no se
promueve para la construcción de granjas eólicas debido a la baja eficiencia de sus rotores; sin embargo, su geometría favorece su aplicación para la generación de energía en aplicaciones domésticas. El rotor de eje vertical Savonious fue desarrollado con la finalidad de poder generar electricidad a velocidades tan bajas como 5 m/s. Sin embargo, sus alabes no permiten una sustentación del movimiento del rotor a velocidades tan bajas. Como consecuencia, se desarrolló el rotor Savonious-curvado que genera un mayor torque; debido a que, tiene mayor número de puntos de contacto entre el rotor y el viento.
Esta tesis se propone el diseño de un aerogenerador vertical Savonius-curvado, para su
ensayo en un túnel de viento de 50 x 50 cm de área de sección de ensayo, para la determinación de sus coeficientes de desempeño para velocidades desde 0.5 m/s a 30 m/s. Se realizara los planos mecánicos del rotor y del sistema de sujeción que se empleara para posicionar el rotor en el túnel de viento. Además, se planteara el protocolo de ensayo para determinar el torque y la velocidad del rotor experimentalmente.Tesi
Genetic influences on level and stability of self-esteem
No full textWe attempted to clarify the relation between self-esteem level (high vs. low) and perceived self-esteem stability (within-person variability) by using a behavioral genetics approach. We tested whether the same or independent genetic and environmental influences impact on level and stability. Adolescent twin siblings (n = 183 pairs) completed level and stability scales at two time points. Heritability for both was substantial. The remaining variance in each was attributable to non-shared environmental influences. Shared environmental influences were not significant. Level and stability of self-esteem shared common antecedents via genetic and non-shared environmental influences. Nonetheless, stability was influenced by substantial unique genetic and non-shared environmental influences. The results validate the notion that level and stability are partially autonomous components of self-esteem
Temporal and comparative outcomes of cardiac electrophysiology abstracts
No full textAlthough conferences are important vehicles for discussing scientific findings, the translation of presented research into peer-reviewed manuscripts is a crucial subsequent step in the research process. Given the evolving subspecialization of cardiology, we sought to characterize the temporal and comparative outcomes of abstracts presented at a subspecialty cardiac electrophysiology conference. Abstracts presented at the Heart Rhythm Society conference (1994 through 2006; HRS abstracts) and abstracts presented at the American Heart Association conference (2003; AHA abstracts) were studied. Subsequent publications, impact factors, and citation rates were determined. A total of 3,850 HRS and 1,000 AHA abstracts were studied. More human abstracts were presented at HRS than AHA (p <0.05). Compared with HRS abstracts, more AHA abstracts were published (p <0.001) and had higher impact factors and citation rates (p <0.001 for both). These differences were attributable in part to the greater proportion of human HRS abstracts. Compared with HRS abstracts, electrophysiology-related AHA abstracts were published less (p <0.001), and these publications had similar impact factors (p = 0.38) although greater citation rates (p = 0.001). The number and publication rate of HRS abstracts increased over the 15-year period, as did their publication impact factors and citation rates (p <0.001 for all). In conclusion, there are significant differences between AHA and HRS abstracts. Although AHA abstracts were more likely to be published overall, the publication rate and impact of electrophysiology abstracts presented at both a subspecialty (HRS) and a major cardiovascular conference (AHA) were comparable. There has also been a growth in the number and impact of cardiac electrophysiology abstracts presented at HRS in recent years.Christopher X. Wong, Michelle T. Sun, Yi Han Cheng, Jerry Dang, David S. Barlow, Nicholas H. Chia, Nicole X. Wong, Michelle X. Wong, Dennis H. Lau, Anthony G. Brooks, Kurt C. Roberts-Thomson and Prashanthan Sander
Diseño de un aerogenerador vertical savonious-curvados para ensayos experimentales con velocidades de 4 m/s a 8 m/s
No full textLa energía eólica en el Perú emplea en un 100% aerogeneradores de eje horizontal para la generación de energía eléctrica. El uso de aerogeneradores de eje vertical no se
promueve para la construcción de granjas eólicas debido a la baja eficiencia de sus rotores; sin embargo, su geometría favorece su aplicación para la generación de energía en aplicaciones domésticas. El rotor de eje vertical Savonious fue desarrollado con la finalidad de poder generar electricidad a velocidades tan bajas como 5 m/s. Sin embargo, sus alabes no permiten una sustentación del movimiento del rotor a velocidades tan bajas. Como consecuencia, se desarrolló el rotor Savonious-curvado que genera un mayor torque; debido a que, tiene mayor número de puntos de contacto entre el rotor y el viento.
Esta tesis se propone el diseño de un aerogenerador vertical Savonius-curvado, para su
ensayo en un túnel de viento de 50 x 50 cm de área de sección de ensayo, para la determinación de sus coeficientes de desempeño para velocidades desde 0.5 m/s a 30 m/s. Se realizara los planos mecánicos del rotor y del sistema de sujeción que se empleara para posicionar el rotor en el túnel de viento. Además, se planteara el protocolo de ensayo para determinar el torque y la velocidad del rotor experimentalmente
Tunable Silk : Using Microfluidics to Fabricate Silk Fibers with Controllable Properties
No full textDespite widespread use of silk, it remains a significant challenge to fabricate fibers with properties similar to native silk. It has recently been recognized that the key to tuning silk fiber properties lies in controlling internal structure of assembled ?-sheets. We report an advance in the precise control of silk fiber formation with control of properties via microfluidic solution spinning. We use an experimental approach combined with modeling to accurately predict and independently tune fiber properties including Young's modulus and diameter to customize fibers. This is the first reported microfluidic approach capable of fabricating functional fibers with predictable properties and provides new insight into the structural transformations responsible for the unique properties of silk. Unlike bulk processes, our method facilitates the rapid and inexpensive fabrication of fibers from small volumes (50 ?L) that can be characterized to investigate sequence-structure-property relationships to optimize recombinant silk technology to match and exceed natural silk properties
Ashes col' darg lay dong: Trinidadian students' response to the UK
No full textThis research investigates how Trinidadian students in the United Kingdom (UK) respond to their new environment. The research explores and conceptualises the participants? experiences in the UK. It investigates Trinidadian student adjustment in the UK from a postcolonial perspective. To acquire data on Trinidadian experiences in the UK I created a private, password-protected group blog (interactive webpage) where eight respondents interacted and shared aspects of their everyday life and experiences over six months. After the blogging period follow-up face-to-face individual interviews were conducted with five of the eight participants. The research design was formulated so that the two methods would work together to paint a vivid, multidimensional and dynamic picture of the participants? experiences. These two techniques together are referred to as the blog-interview method. The experiences of three of the participants were captured as in-depth case studies. Grounded Theory was used to analyze the data and generate a working theory of the participants? experiences. A theory of adjustment, called (dis)juncture, was developed. The theory views the students? adjustment as a continuous process of negotiation among simultaneous connecting and disconnecting forces. This can create a student who is a synergy of global experiences, signifying systems, representations, identities, worldviews and perspectives that are not exclusively in one domain: they are hybrid. Unlike much work in this area, (dis)juncture does not view adjustment in stages nor does it assume that adjustment is something that can be achieved. Adjustment is advanced as a process of continuous transformation as a result of constant contact with multiple signifying systems simultaneously. (Dis)Juncture breaks important ground in the field by reconceptualising and re-imaging the process of international student adjustment. The theory thus makes a significant contribution to research on international student experience
The operation of biopower and biopolitics in the implementation process of reproductive health policies in Peru
No full textIn present-day societies, human life is often an arena of debate within which claims of morality, knowledge, and truth are contested. The meaning of human life, as well as the right to exert control over the bodies that create this life, are constructed by various discourses. In this process, special attention is paid to human bodies with particular capacities and needs, such as women’s bodies. The reproductive capacity of women’s bodies has long been considered central to defining the meaning of being a woman in Western societies. This gender essentialism related to the maternal role guides some reproductive health policies, which are implemented within a complex architecture of discourses, institutionalized social stratification, biopower and biopolitics. The Peruvian case offers clear examples of this situation.
In Peru, reproductive healthcare policy has been irregularly implemented throughout the last twenty years, mostly due to the strong influence that conservative Catholic groups have been able to exert on the Peruvian Government. The discourse articulated by these groups asserts that human life begins at the moment of conception and is a gift from God; therefore, no one should be permitted to interfere in the processes of human life from conception until death. This sacralisation of human life has been progressively constructed within Catholic doctrine, which today incorporates selective interpretations of scientific knowledge in support of its claims. This discourse about human life directly and adversely affects Peruvian women’s bodies and lives. Due to their reproductive capacity, the conservative Catholic discourse considers women as bearers of human life. However, their decision-making power about the creation of this life is not taken into account in this discourse, especially when this decision-making power is linked to the exertion of sexual and reproductive rights. The influence of conservative Catholic discourse on the implementation process of Peru’s reproductive health policy is thus the central focus of this thesis.
The analysis offered in this thesis is informed by a feminist critical discourse analysis of Peruvian politics, policy and law relating to three key issues: coercive sterilisation of indigenous Peruvian women during the regime of Fujimori (1996-2000), the ongoing lack of access to safe and legal abortion, and the 2009 Constitutional Court ban on the distribution of free emergency contraception within the public health sector. My analysis reveals that the Catholic interest in, and influence on, reproductive health policy was largely stimulated by Fujimori’s policy of coercive sterilization, which was in turn prompted by a eugenic discourse that conservative Catholic groups, among others within Peruvian civil society, actively denounced. This opposition consolidated the influence of conservative Catholic discourse within the political domain. Further, I suggest that the actions of the State, increasingly influenced by Catholic interests, can best be understood in terms of Foucault’s concept of biopower, with reproductive health policy being the primary tool used to effect the State’s biopolitical agenda. As I illustrate, the influence of Catholic discourse on reproductive policy and practice is most clearly evident in the ongoing impediments placed in the way of women trying to access therapeutic abortions, and the prohibition of the free distribution of the emergency contraceptive pill via the public health system. Even in the face of local and international condemnation, the State persists in its non-compliance with the provisions of international human rights agreements, a failure which I suggest can only be understood by acknowledging the defining influence of Catholic discourse and interests within Peru’s political domain.
The significance of this thesis thus lies in its analysis of the discourses and political machinations that restrict the exertion of Peruvian women’s sexual and reproductive rights. These constraints are achieved through the operation of biopower enacted through the implementation of various reproductive health policies. This situation, I suggest, confines women via a constructed “naturalness” that reproduces essentialist notions of gender. As the case studies presented in this thesis demonstrate, a vital component of this discursive essentialisation of the maternal role is the identification of women as reproductive bodies that can be regulated and managed in accordance with the interests and discursive affiliations of the State, as opposed to individual citizens with autonomous decision-making power over their bodies and their own lives
Correction: Feasibility and acceptability of implementing the Global Scales for Early Development (GSED) package for children 0–3 years across three countries
No full textFollowing publication of the original article [1], the authors reported an error in the author names of Magdalena Janus, Yvonne Schönbeck, Abdullah H. Baqui and Rasheda Khanam, and an error to the affiliations of authors Tarun Dua, Romuald Kouadio E. Anago, Michelle Perez Maillard and Gillian Lancaster. The incorrect author name is: Magdalana Janus. The correct author name is: Magdalena Janus. The incorrect author name is: Yvonne Schonbeck. The correct author name is: Yvonne Schönbeck. The incorrect author name is: Abdullah Baqui. The correct author name is: Abdullah H. Baqui. The incorrect author name is: Rasheda Khanum. The correct author name is: Rasheda Khanam. Authors Tarun Dua and Michelle Perez Maillard should be affiliated to “Department of Mental Health and Substance Use, World Health Organization, Geneva, Switzerland”, author Romuald Kouadio E. Anago should be affiliated to “Innovations for Poverty Action, IPA Côte d’Ivoire, Abidjan, Côte d’Ivoire”, and author Gillian Lancaster should be affiliated to “School of Medicine, Keele University, Keele, UK”. The author group has been updated above and the original article [1] has been corrected
Correction to “Further Disadvantages of Socioeconomic Status:The Role of Subjective Social Status in University Students' Sense of Belonging”(Journal of Community and Applied Social Psychology, (2025), 35, (e70037), 10.1002/casp.70037)
No full textFernandez, D., C. Y. Wong, S. Bedford, L. Oliveria-Silva, C. Begeny, and M. Ryan. 2025. “Further Disadvantages of Socioeconomic Status: The Role of Subjective Social Status in University Students' Sense of Belonging.” Journal of Community and Applied Social Psychology 35, e70037. https://doi.org/10.1002/casp.70037. The fourth author's name, ‘Oliveria-Silva, L.’, is misspelled on the list of authors of the paper. This should have read: ‘Oliveira-Silva, L. C’. We apologise for this error.</p
Periodismo y Literatura: Poderosa voz de oposici??n en los trabajos de Elena Poniatowska
No full textABSTRACTO PARA ENVIO DE TESIS DIGITAL VERSION BILING??E\ud
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Este trabajo explora de qu?? manera el lenguaje literario y el period??stico emergen en una sola l??nea, aunque en muchas ocasiones tienen una fr??gil l??nea divisoria.\ud
Esta investigaci??n se concentra en el an??lisis de discurso de dos obras de la escritora y periodista mexicana Elena Poniatowska: Hasta no verte Jes??s m??o, una novela narrada en primera persona sobre la vida de una mujer de clase humilde y explotada, y La noche de Tlatelolco, testimonial oral de la matanza de estudiantes en la Ciudad de M??xico en 1968.\ud
Con este an??lisis se muestra c??mo Poniatowska mezcla el lenguaje literario y el period??stico, por lo que se puede considerar un ejemplo del llamado nuevo periodismo, o literatura period??stica.\ud
Este trabajo deambula por la historia del periodismo y la literatura como medios de expresi??n escrita que surgen de una misma ra??z, pero que a trav??s de la historia se han separado. No obstante, muchos grandes escritores y periodistas han practicado ambas ramas con ??xito.\ud
El an??lisis de las obras de Elena Poniatowska muestra c??mo una periodista incursiona en el mundo de la literatura y cruza la l??nea divisoria, para con su discurso literario period??stico abrir espacio a las voces que tradicionalmente han sido silenciadas. Aqu?? se demuestra que con sus narraciones literario period??sticas deja escuchar a ???los otros???, a los que siempre han sido callados.\ud
Este trabajo plantea c??mo las bases te??ricas de Mijail M. Bajt??n sobre el dialogismo se ejemplifican en las obras de Poniatowska, planteando c??mo sus discursos narrativos y period??sticos dejan espacio para que los enunciados que une en su narraci??n sean el espacio de ese dialogo de los ???otros???.\ud
Asimismo, se demuestra, a trav??s del an??lisis del discurso planteado por los te??ricos Teun van Dijk, Frances Henry y Carol Tator, c??mo la obra period??stica literaria de Poniatowska es un ejemplo de la lucha contra el discurso de dominaci??n y racismo en la prensa que tradicionalmente reflejan los medios de comunicaci??n masiva.\ud
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ENGLISH VERSION\ud
This paper explores how the literary and journalistic language merge into a single line, although divided by a fragile border. This research focuses on the discourse analysis of two literary works of the Mexican writer and journalist Elena Poniatowska. Hasta no verte Jesus m??o is a novel narrated in the first person about the life of a woman from a humble and exploited social sector. The printed work The Night of Tlatelolco is the oral testimony of survivors and witnesses from the 1968 student massacre.\ud
This analysis shows how Poniatowska creates a mixture between literary language and journalism in her works, so it can be an example of so-called new journalism, literature or journalism. This work wanders through the history of journalism and literature, as writing media arising from the same branch, yet separated through history. However, there are many great writers and journalists, who have successfully practiced both disciplines.\ud
The works of Elena Poniatowska are an example of a journalist???s ventures into the world of literature; they cross the line into journalistic literary discourse. I demonstrate how the author???s journalistic literary narratives gives voice to those traditionally silenced.\ud
This work uses a combination of dialogism and discourse analysis as theoretical frameworks to (1) discuss the works of Poniatowska to understand how the author raises the journalistic narratives and leaves open space for the statements that join paths in the narrative for dialogue of the 'other', while also (2) demonstrating how the literary journalistic work of Poniatowska is a good example of the struggle against domination and racist speech in the press traditioanlly reflected in the mass media.Spanis
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