935 research outputs found
Exploring the interplay between Buddhism and career development : a study of highly skilled women workers in Sri Lanka
This article adopts a socio cultural lens to examine the role of Buddhism in highly skilled women workers’ careers in Sri Lanka. While Buddhism enabled women’s career development by giving them strength to cope with difficult situations in work, it also seemed to restrict their agency and constrain their career advancement. Based on our findings, we argue that being perceived as a good Buddhist woman worked as a powerful form of career capital for the respondents in our sample, who used their faith to combat gender disadvantage in their work settings
Proton acceleration by irradiation of isolated spheres with an intense laser pulse
We report on experiments irradiating isolated plastic spheres with a peak laser intensity of 2-3 x 10(20) W cm(-2). With a laser focal spot size of 10 mu m full width half maximum (FWHM) the sphere diameter was varied between 520 nm and 19.3 mu m. Maximum proton energies of similar to 25 MeV are achieved for targets matching the focal spot size of 10 mu m in diameter or being slightly smaller. For smaller spheres the kinetic energy distributions of protons become nonmonotonic, indicating a change in the accelerating mechanism from ambipolar expansion towards a regime dominated by effects caused by Coulomb repulsion of ions. The energy conversion efficiency from laser energy to proton kinetic energy is optimized when the target diameter matches the laser focal spot size with efficiencies reaching the percent level. The change of proton acceleration efficiency with target size can be attributed to the reduced cross-sectional overlap of subfocus targets with the laser. Reported experimental observations are in line with 3D3V particle in cell simulations. They make use of well-defined targets and point out pathways for future applications and experiments.DFG via the Cluster of Excellence Munich-Centre for Advanced Photonics (MAP) Transregio SFB TR18NNSA DE-NA0002008Super-MUC pr48meIvo CermakCGC Instruments in design and realization of the Paul trap systemIMPRS-APSLMUexcellent Junior Research FundDAAD|ToIFEEuropean Union's Horizon research and innovation programme 633053Physic
The Eucharistic liturgy in the English independent, or congregational, tradition: a study of its changing structure and content 1550 - 1974
The Independent tradition emerged as a distinct movement in the 1640’s but its background must be sought in the Puritan and Separatist Movements of the previous century. During the history of this tradition the attitude towards liturgical forms has varied from total opposition to any form of set prayer to the advocacy of a directory form of worship. The Eucharistic liturgy in this tradition originates with the Puritan rites derived from Calvin and h Lasco, adaptations of the Book of Common Prayer, and the Separatist rites. Another source of inspiration seems to have been the liturgy of the Dutch Reformed Church. In 1645 the Westminster Directory was a compromise between Independent and Presbyterian practices. After the Restoration the Independents rejected written forms their Eucharistic rites being similar to that of the Directory, but shorn of the Presbyterian concessions. In the nineteenth century the changing status of dissenters contributed to a liturgical revival, and the Book of Common Prayer was adopted by some Congregational Churches. John Hunter's Devotional Services became particularly popular within the denomination, providing the first Congregational liturgy worthy of the name. Without much influence, but remarkable on account of its Catholic character was Dr. W. E. Orchard's Divine Service of 1919 and 1926.The Congregational Union itself produced liturgies in 1920 and 1956, the latter being heavily influenced by Liberal Theology. Since 1948 a 'Genevan' or Neo-orthodox Movement, together with the influence of the Liturgical and Ecumenical Movements, has resulted in Eucharistic rites based upon liturgical history and theology. The study of this wide variety of rites can benefit the Liturgical Movement and the denomination's own understanding of its Eucharistic liturgical tradition
Climatology Of The African Easterly Jet And Subtropical Highs Over North Africa And Arabian Peninsula And A Numerical Case Study Of An Intense African Easterly Wave
North African climate is analyzed between 1979 and 2010 with an emphasis on August using the European Center for Medium Range Weather Forecast (ECMWF) global dataset to investigate the effects of the subtropical anticyclones over North Africa and the Arabian Peninsula on the Africa easterly jet (AEJ). It was found that the AEJ encloses a core with a local wind maximum (LWM) in both West and East Africa, in which the west LWM core has a higher zonal wind speed. The strength of both cores is distinctly different by way of thermal wind balance. The variability of these synoptic weather features is higher in East Africa. The most noticeable variability of intensity occurred with easterly waves. Maintenance of easterly waves from the Arabian Peninsula into East Africa is dependent on strong zonal gradients from the AEJ. These zonal gradients were induced by the strengthening of the subtropical highs and the presence of a westerly jet in Central Africa and south of the Arabian Peninsula. During positive ENSO periods, these systems are generally weaker while in negative periods are stronger. The origins of an intense African easterly wave (AEW) and mesoscale convective system (MCS) in August 2004 (A04) were traced back to the southern Arabian Peninsula, Asir Mountains, and Ethiopian Highlands using gridded satellite (GridSat) data, ERA-I, and the WRF-ARW model. A vorticity budget was developed to investigate the dynamics and mechanisms that contribute to the formation of A04’s vorticity perturbation
With angels and archangels the background, form and function of the sanctus in the eucharistic prayer
With angels and archangels the background, form and function of the sanctus in the eucharistic prayer.The origin of the sanctus as a constituent element in the eucharistic prayer is one of the unsolved mysteries of Christian liturgy. In a Prolegomena, certain specific older theories are rejected. The use of the qeduasah in Judaism, from its biblical setting to its use in Jewish liturgy and mysticism is examined, and the continuity of these usages in Christian non-eucharlstic contexts is illustrated. From this wider background, the study examines the setting and function of the sanctus in the anaphoras of East and West to the seventh century, showing that the earliest attestations and the most logical use of the sanctus both originate in Syria and Palestine. In the peculiar Egyptian anaphoral family, it is used within Intercessions, and at Rome it appears to be a late fourth century addition, which was never given a logical setting in the canon missae. Possible origins are the Jewish Synagogue berakot, the Jewish mystical tradition, or some biblically-minded celebrants. But these possible origins are better accounted for when a variety of models for early eucharistic prayers is accepted, rather than the single model of the Birkat ha-mazon. The development of the sanctus in later Eastern and Western traditions is examined, noting the proliferation of angelological speculation in West Syria, the innovatory uses of Luther and Cranmer, and the interesting nineteenth century Reformed usage. In modern anaphoral composition it appears to be a sine qua non. Finally, the sanctus is examined in a wider theological context, defending a variety of logical doxological usages, with more than one position in the anaphora, and possibly wider variations of the biblical/liturgical form
Radiolysis of water ice in the outer solar system: Sputtering and trapping of radiation products
We performed quantitative laboratory radiolysis experiments on cubic water ice between 40 and 120 K, with 200 keV protons. We measured sputtering of atoms and molecules and the trapping of radiolytic molecular species. The experiments were done at fluences corresponding to exposure of the surface of the Jovian icy satellites to their radiation environment up to thousands of years. During irradiation, O2 molecules are ejected from the ice at a rate that grows roughly exponentially with temperature; this behavior is the main reason for the temperature dependence of the total sputtering yield. O2 trapped in the ice is thermally released from the ice upon warming; the desorbed flux starts at the irradiation temperature and increases strongly above 120 K. Several peaks in the desorption spectrum, which depend on irradiation temperature, point to a complex distribution of trapping sites in the ice matrix. The yield of O2 produced by the 200 keV protons and trapped in the ice is more than 2 orders of magnitude smaller than used in recent models of Ganymede. We also found small amounts of trapped H2O2 that desorb readily above 160 K.Fil: Bahr, D.A.. University of Virginia; Estados UnidosFil: Famá, M.. University of Virginia; Estados UnidosFil: Vidal, Ricardo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Baragiola, Raul Antonio. University of Virginia; Estados Unido
Students\u27 Perception of Engagement in a Third-Grade Writing Classroom
Educators have been challenged for many years to engage their students, but often students still seem to be disengaged (Klem & Connell, 2004). Research indicates student engagement is critical to student achievement and success in school (Appleton, 2008; Connell, Spencer, & Aber, 1994; Easton, 2008; Fredricks, Blumenfeld, & Paris, 2004). Student engagement is imperative in all subject areas, yet, after considering the research, writing is a particularly significant school subject that may be impacted by student engagement.
Considering the research on engagement and the need to improve students’ literacy achievement, there is a compelling reason to know how and when students are engaged in writing. The aim of this study was to investigate the intersection of engagement theory and students’ engagement. Specifically, this inquiry focused on the students’ perceptions of engagement while identifying indicators of engagement and factors affecting engagement related to the student, task, or context within the writing classroom. My study addressed the following questions: (a) How can student’s engagement in a writing classroom be described? and (b) What are students’ perceptions of their engagement in a writing classroom?
The findings of this study prompt educators to consider the importance of focusing on engagement in our classrooms. Students identified factors that promoted their engagement: importance of choice, making connections and teacher modeling. This study also found engagement and attitude influenced each other resulting in a positive classroom environment. Finally, this research identified the significance of student voice and how students are able to ascertain their level of engagement, if asked
Structure-based design and synthesis of antiparasitic pyrrolopyrimidines targeting pteridine reductase 1
The treatment of Human African Trypanosomiasis remains a major unmet health need in sub-Saharan Africa. Approaches involving new molecular targets are important and pteridine reductase 1 (PTR1), an enzyme that reduces dihydrobiopterin in Trypanosoma spp. has been identified as a candidate target and it has been shown previously that substituted pyrrolo[2,3-d]pyrimidines are inhibitors of PTR1 from T. brucei (J. Med. Chem. 2010, 53, 221-229). In this study, 61 new pyrrolo[2,3-d]pyrimidines have been prepared, designed with input from new crystal structures of 23 of these compounds complexed with PTR1, and evaluated in screens for enzyme inhibitory activity against PTR1 and in vitro antitrypanosomal activity. 8 compounds were sufficiently active in both screens to take forward to in vivo evaluation. Thus although evidence for trypanocidal activity in a stage I disease model in mice was obtained, the compounds were too toxic to mice for further development
A mathematical modelling study of an athlete's sprint time when towing a weighted sled
This is the author's accepted manuscript. The final publication is available at Springer via http://dx.doi.org/10.1007/s12283-013-0114-2.This study used a mathematical model to examine the effects of the sled, the running surface, and the athlete on sprint time when towing a weighted sled. Simulations showed that ratio scaling is an appropriate method of normalising the weight of the sled for athletes of different body size. The relationship between sprint time and the weight of the sled was almost linear, as long as the sled was not excessively heavy. The athlete’s sprint time and rate of increase in sprint time were greater on running surfaces with a greater coefficient of friction, and on any given running surface an athlete with a greater power-to-weight ratio had a lower rate of increase in sprint time. The angle of the tow cord did not have a substantial effect on an athlete’s sprint time. This greater understanding should help coaches set the training intensity experienced by an athlete when performing a sled-towing exercise
Simple and strong: twisted silver painted nylon artificial muscle actuated by Joule heating
Highly oriented nylon and polyethylene fibres shrink in length when heated and expand in diameter. By twisting and then coiling monofilaments of these materials to form helical springs, the anisotropic thermal expansion has recently been shown to enable tensile actuation of up to 49% upon heating. Joule heating, by passing a current through a conductive coating on the surface of the filament, is a convenient method of controlling actuation. In previously reported work this has been done using highly flexible carbon nanotube sheets or commercially available silver coated fibres. In this work silver paint is used as the Joule heating element at the surface of the muscle. Up to 29% linear actuation is observed with energy and power densities reaching 840 kJ m[superscript -3] (528 J kg[superscript -1]) and 1.1 kW kg[superscript -1] (operating at 0.1 Hz, 4% strain, 1.4 kg load). This simple coating method is readily accessible and can be applied to any polymer filament. Effective use of this technique relies on uniform coating to avoid temperature gradients
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