115 research outputs found
Politics of Iran-West relations within the context of Iranian occidentalism; image of the west in the Iranian press during reformism (1997-2001) and conservatism (2005-2009)
The present research is about relations between Iran and the West from the communication point of view and the role of the media in creating anti-American and anti-Western sentiments amongst the Iranians. It studies how Occidentalism has evolved in Iran and how, as an ideological representation, it has influenced the press portrayal of the West in the country. It also identifies dominant frames in newspaper reporting of the West and indicates how the perception of reality and meaning construction work in mainstream Iranian newspapers.
The present thesis seeks to investigate, through content analysis of news items and critical discourse analysis of news editorials, the impact of political affiliation of newspapers (as the first independent variable) and the political period in which they are published (as the second independent variable) on the representation of the West (as the dependent variable) in Iran. The results and findings of the present study are yet another contribution to the study of the West, particularly in the Iranian context. In fact, the representation of the West in mainstream Iranian newspapers in the way discussed throughout this thesis signifies the creation of a new type of Occidentalism in the Orient, which I here brand as “Iranoccidentalism”.
Iranoccidentalism is an ideological concept, which is under the influence of the prevailing discourse; It projects the West, through media, as “arrogant/imperial and interventionist”; It is coupled with anti-Americanism and opposition to the West, and is linked to the history of colonialism and imperialism in Iran as well as the Iranian encounter with modernity; Moreover, it is a reaction to Orientalism and seeks to spread the Islamic ideology of governance and awakening within the framework of the Shiite ideology;
Furthermore, Iranoccidentalism pursues a “nativistic” and “nationalistic” approach which manifests itself in the Iranians’ national resolve to develop indigenous technologies such as the nuclear, aerospace and missile technologies as well as biotechnology and nanotechnology. I argue in the course of this thesis that Occidentalism is evolving and turning into a structured discourse in Asia and especially in the Muslim countries of the Middle East, including in Iran where it is under the great influence of the history of relations with the West and in particular the Iranian response to Western-driven modernity
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Cure kinetics of epoxy nanocomposites affected by MWCNTs functionalization: A review
The current paper provides an overview to emphasize the role of functionalization of multiwalled carbon nanotubes (MWCNTs) in manipulating cure kinetics of epoxy nanocomposites, which itself determines ultimate properties of the resulting compound. In this regard, the most commonly used functionalization schemes, that is, carboxylation and amidation, are thoroughly surveyed to highlight the role of functionalized nanotubes in controlling the rate of autocatalytic and vitrification kinetics. The current literature elucidates that the mechanism of curing in epoxy/MWCNTs nanocomposites remains almost unaffected by the functionalization of carbon nanotubes. On the other hand, early stage facilitation of autocatalytic reactions in the presence of MWCNTs bearing amine groups has been addressed by several researchers. When carboxylated nanotubes were used to modify MWCNTs, the rate of such reactions diminished as a consequence of heterogeneous dispersion within the epoxy matrix. At later stages of curing, however, the prolonged vitrification was seen to be dominant. Thus, the type of functional groups covalently located on the surface of MWCNTs directly affects the degree of polymer-nanotube interaction followed by enhancement of curing reaction. Our survey demonstrated that most widespread efforts ever made to represent multifarious surface-treated MWCNTs have not been directed towards preparation of epoxy nanocomposites, but they could result in property synergism
Interaction between random heterogeneously charged surfaces in an electrolyte solution
We study, using Monte Carlo simulations, the interaction between infinite
heterogeneously charged surfaces inside an electrolyte solution. The surfaces
are overall neutral with quenched charged domains. An average over the quenched
disorder is performed to obtain the net force. We find that the interaction
between the surfaces is repulsive at short distances and is attractive for
larger separations
Echocardiographic evaluation of mitral geometry in functional mitral regurgitation
<p>Abstract</p> <p>Objectives</p> <p>We sought to evaluate the geometric changes of the mitral leaflets, local and global LV remodeling in patients with left ventricular dysfunction and varying degrees of Functional mitral regurgitation (FMR).</p> <p>Background</p> <p>Functional mitral regurgitation (FMR) occurs as a consequence of systolic left ventricular (LV) dysfunction caused by ischemic or nonischemic cardiomyopathy. Mitral valve repair in ischemic MR is one of the most controversial topic in surgery and proper repairing requires an understanding of its mechanisms, as the exact mechanism of FMR are not well defined.</p> <p>Methods</p> <p>136 consecutive patients mean age of 55 with systolic LV dysfunction and FMR underwent complete echocardiography and after assessing MR severity, LV volumes, Ejection Fraction, LV sphericity index, C-Septal distance, Mitral valve annulus, Interpapillary distance, Tenting distance and Tenting area were obtained.</p> <p>Results</p> <p>There was significant association between MR severity and echocardiogarphic indices (all p values < 0.001). Severe MR occurred more frequently in dilated cardiomyopathy (DCM) patients compared to ischemic patients, (p < 0.001). Based on the model, only Mitral valve tenting distance (TnD) (OR = 22.11, CI 95%: 14.18 – 36.86, p < 0.001) and Interpapillary muscle distance (IPMD), (OR = 6.53, CI 95%: 2.10 – 10.23, p = 0.001) had significant associations with MR severity.</p> <p>Mitral annular dimensions and area, C-septal distance and sphericity index, although greater in patients with severe regurgitation, did not significantly contribute to FMR severity.</p> <p>Conclusion</p> <p>Degree of LV enlargement and dysfunction were not primary determinants of FMR severity, therefore local LV remodeling and mitral valve apparatus deformation are the strongest predictors of functional MR severity.</p
Outcomes of chronic total occlusion percutaneous coronary intervention from the RAIAN (RAjaie - Iran) registry
Objective: While most of the evidence in CTO interventions emerge from Western and Japanese studies, few data have been published up today from the Middle East. Objective of this study was to evaluate technical success rates and clinical outcomes of an Iranian population undergoing CTO PCI in a tertiary referral hospital. Moreover, we sought to evaluate the efficacy of our CTO teaching program. Methods: This is a retrospective single-center cohort study including 790 patients who underwent CTO PCI performed by operators with different volumes of CTOs PCI performed per year. According to PCI result, all patients have been divided into successful (n = 555, 70.3 %) and unsuccessful (n = 235, 29.7 %) groups. Study endpoints were Major Adverse Cardiovascular Events and Health Status Improvement evaluated using the Seattle Angina Questionnaire at one year. Results: A global success rate of 70 % for antegrade and 80 % for retrograde approach was shown despite the lack of some CTO-dedicated devices. During the enrollment period, the success rate increased significantly among operators with a lower number of CTO procedures per year. One-year MACE rate was similar in both successful and unsuccessful groups (13.5 % in successful and 10.6 % in unsuccessful group, p = 0.173). One year patients' health status improved significantly only in successful group. Conclusions: No significant differences of in-hospital and one-year MACE were found between the successful and unsuccessful groups. Angina symptoms and quality of life significantly improved after successful CTO PCI. The RAIAN registry confirmed the importance of operator expertise for CTO PCI success
Obtaining Adequate Surgical Margins in Breast-Conserving Therapy for Patients with Early-Stage Breast Cancer: Current Modalities and Future Directions
Inadequate surgical margins represent a high risk for adverse clinical outcome in breast-conserving therapy (BCT) for early-stage breast cancer. The majority of studies report positive resection margins in 20% to 40% of the patients who underwent BCT. This may result in an increased local recurrence (LR) rate or additional surgery and, consequently, adverse affects on cosmesis, psychological distress, and health costs. In the literature, various risk factors are reported to be associated with positive margin status after lumpectomy, which may allow the surgeon to distinguish those patients with a higher a priori risk for re-excision. However, most risk factors are related to tumor biology and patient characteristics, which cannot be modified as such. Therefore, efforts to reduce the number of positive margins should focus on optimizing the surgical procedure itself, because the surgeon lacks real-time intraoperative information on the presence of positive resection margins during breast-conserving surgery. This review presents the status of pre- and intraoperative modalities currently used in BCT. Furthermore, innovative intraoperative approaches, such as positron emission tomography, radioguided occult lesion localization, and near-infrared fluorescence optical imaging, are addressed, which have to prove their potential value in improving surgical outcome and reducing the need for re-excision in BCT
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