252 research outputs found

    A Couple That Fights Together Stays Together: Romance, Marriage, And Divorce In British Home Front Films Of The Second World War

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    The impact of total war on the British home front from 1939 to 1945 was profound. In particular, military and economic mobilization disrupted gender relations. Men and women of different class and national backgrounds encountered each other, sometimes forming romantic relationships that strained the institutions of marriage and family. This disruption was heavily depicted in wartime British cinema, especially in feature films devoted to the home front experience. Differences of class, gender, and nationality were downplayed in order to construct a solidaristic meaning for wartime social experience, fitting for “the People’s War.” My thesis examines romantic relationships and marriages depicted in numerous British home front films. While many films featured unconventional couples of mixed class or nationality, they did not always offer happy endings. I argue that these films evince the problems of marriage in wartime Britain and foreshadow the rise in divorce that came with peace in 1945-46

    Selective laser sintering of bioactive glass scaffolds and their biological assessment for bone repair

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    Bone scaffold fabrication using powder-bed based additive manufacturing techniques, like the selective laser sintering (SLS) process, provides control over pore interconnectivity, pore geometry, and the overall shape of the scaffold, which aids in repairing different regions of the bone. The main objectives of this dissertation were to develop bioactive glass (BG) scaffolds using the SLS process and evaluate the scaffolds for their effectiveness in bone repair both in vitro and in vivo. 13-93 glass, a silicate based BG, and 13-93B3 glass, a borate based BG, are designed to accelerate the body\u27s natural ability to heal itself and are used in this research. After the initial feasibility study, the material and process parameters were optimized to improve the compressive strength from ~20 MPa to ~41 MPa, for a 13-93 BG scaffold with a porosity of ~50%. Pore geometry of the scaffold plays a crucial role as it not only affects the mechanical properties and subsequent degradation but also the bone cell proliferation. Scaffolds with a porosity of ~50% and five different pore geometries, namely, cubic, spherical, X, diamond, and gyroid, were fabricated and assessed in vitro for a possible preferential cell proliferation. The MTT labeling experiments indicated that the scaffolds with diamond and gyroid pore geometries have higher curvature-driven MLO-A5 cell proliferation. Finally, scaffolds with diamond and cubic pore geometries were evaluated in vivo using a rat calvarial defect model for 6 weeks. Though the results indicated no significant difference in the amount of new bone formation with respect to the defect region, the maturation of the fibrous tissue to bone appeared to be quicker in the scaffolds with diamond architecture --Abstract, page iv

    Confronting the Illusion of Technological Expertise Among College and University Students

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    Over the past 20 years, the faculty and administration of colleges and universities have been debating how technology will change the face of higher education in delivering content to students. Associated with the discussion is research on the acceptability of various devices (e.g. desk-top computers, laptop computers, e-readers, tablets) as replacements for paper textbooks. In most studies, students report their preference for paper textbooks over digital materials for studying and learning. A recent Canadian study examined the preference for paper textbooks. In this study, we repeat key areas of that study with Israeli students and collect comparison data using an online survey. Students in both countries believe that paper textbooks better support their learning and studying processes and are more likely to lead to academic success. However, we note some differences in terms of the Israeli students being less distracted when online, and reporting greater comfort using digital content when searching for information. What has been overlooked in the change from paper to digital delivery of information is how students will make the transition from learning and studying on paper to digital only or simultaneous use of both paper and digital. This study provides ideas as to how educators can better support students and areas where additional research is needed

    1 Burst List Decoding of Interleaved Reed–Solomon Codes

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    Abstract—It is shown that interleaved Reed–Solomon codes can be list-decoded for burst errors while attaining the generalized Reiger bound for list decoding. A respective decoding algorithm is presented which is (significantly) more efficient than a burst list decoder for a non-interleaved Reed–Solomon code with comparable parameters. Finally, it is shown through counterexamples that, unlike the special case of Reed–Solomon codes, interleaving does not always preserve the list decoding properties of the constituent code. Index Terms—Burst errors, interleaving, list decoding, Reed– Solomon codes, Reiger bound. I

    Istraživanje segregacije bora kod niskougljičnih čelika

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    Traces of born in the range 0,002-0,009 % are usually added to many grades of steel. The effect of boron on phase transformations and hardenability of low carbon low alloy steels depends on the form of its behavior in solid solution either in segregations or in precipitations. Temperature and cooling rate determine the existence of boron segregations on grain boundaries. In present paper simulations of boron concentrations were calculated with computer programme DICTRA for low carbon 0,08 %C steel with 0,006 % boron. Investigations were carried out for temperature 1300 – 700°C and cooling rates from 1°C/s to 100°C/s. The changes of boron concentrations in austenite and ferrite after commencement of γ→α phase transformation were established.Tragovi bora u rasponu 0,002-0,009 % se obično dodaju mnogim tipovima čelika. Utjecaj bora na fazne transformacije i zakaljivost niskougljičnih niskolegiranih čelika ovisi o obliku njegovog ponašanja u čvrstoj otpini ili u segregacijama ili u precipitatima. Temperatura i brzina hlađenja određuju postojanje segregacija bora na granicama zrna. U ovom radu simulacije koncentracija bora su proračunate pomoću kompjutorskog programa DICTRA za niskougljični čelik s 0,08 % C i 0,006 % bora. Istraživanja su provedena ta temperature 1 300–700°C i brzine hlađenja od 1°C/s do 100°C/s. Utvrđene su promjene koncentracije bora u austenitu i feritu nakon početka γ→α fazne transformacije

    Istraživanje segregacije bora kod niskougljičnih čelika

    Get PDF
    Traces of born in the range 0,002-0,009 % are usually added to many grades of steel. The effect of boron on phase transformations and hardenability of low carbon low alloy steels depends on the form of its behavior in solid solution either in segregations or in precipitations. Temperature and cooling rate determine the existence of boron segregations on grain boundaries. In present paper simulations of boron concentrations were calculated with computer programme DICTRA for low carbon 0,08 %C steel with 0,006 % boron. Investigations were carried out for temperature 1300 – 700°C and cooling rates from 1°C/s to 100°C/s. The changes of boron concentrations in austenite and ferrite after commencement of γ→α phase transformation were established.Tragovi bora u rasponu 0,002-0,009 % se obično dodaju mnogim tipovima čelika. Utjecaj bora na fazne transformacije i zakaljivost niskougljičnih niskolegiranih čelika ovisi o obliku njegovog ponašanja u čvrstoj otpini ili u segregacijama ili u precipitatima. Temperatura i brzina hlađenja određuju postojanje segregacija bora na granicama zrna. U ovom radu simulacije koncentracija bora su proračunate pomoću kompjutorskog programa DICTRA za niskougljični čelik s 0,08 % C i 0,006 % bora. Istraživanja su provedena ta temperature 1 300–700°C i brzine hlađenja od 1°C/s do 100°C/s. Utvrđene su promjene koncentracije bora u austenitu i feritu nakon početka γ→α fazne transformacije

    Effect of Social Media on Academic Performance of Students in Ghanaian Universities: A Case Study of University of Ghana, Legon.

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    This research work was conducted to investigate the effects of social media on academic performance of students in university of Ghana. The type of research adopted was descriptive survey and the instrument for data collection was the questionnaire. A total sample size of two hundred (200) using cluster sampling technique of probability sampling was used to acquire the relevant data from the population. The findings of the study showed that a number of students are addicted to social media and this was found to be detrimental to their academic life despite its importance on students’ academic life such as disseminating knowledge, group discussions and building relationships through these sites. To this end, the researchers recommended that faculties or schools in various universities organize public lectures on this topic to enlighten students more on the possible implications of these sites when they are not surfed judiciously; lecturers should direct works and assignments through these sites to encourage their use for academic purposes and also the school authorities should restrict access to certain networking sites that may distract students during learnin
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