107 research outputs found
Transanal Versus Laparoscopic Total Mesorectal Excision: A Comparative Prospective Clinical Trial from Two Centers
No full textPurpose: Laparoscopic total mesorectal excision (LapTME) faced many obstacles in obese male with narrow pelvis and bulky mesorectum with increased risk of incomplete mesorectal excision and positive circumferential resection margin (CRM) and distal resection margin (DRM). Transanal total mesorectal excision (TaTME) is reported to result in a better quality total mesorectal excision (TME) specimen, lower incidence of CRM and DRM involvement, and higher rates of sphincter preservation. To date, there is still a debate about the feasibility and efficacy of transanal versus the laparoscopic approach for TME in middle and low rectal cancer.Materials and Methods: This is a prospective controlled clinical trial where 38 patients of middle or low rectal cancer from two tertiary centers were nonrandomly assigned to either TaTME or LapTME.Results: Eighteen patients were operated by TaTME versus 20 patients by LapTME. Mean body mass index was significantly higher in the TaTME group (30.74 +/- 7.79) than in the LapTME group (25.99 +/- 4.68) (P = .03). TaTME was associated with more transanal specimen extraction (55.5% versus 20%, P = .06). No significant differences were detected in CRM, DRM, peri- or postoperative complications, or conversion rates with more reported Clavien-Dindo grade III complications in the TaTME group (P = .29).Conclusions: TaTME facilitated rectal cancer surgery in obese patients and increased the chance of transanal specimen extraction with equivalent oncological outcomes to conventional LapTME. Further studies are recommended to build better evidence
Window of Palestine: Performance number 7.
No full textThe "Window of Palestine" episode at Unitec offered a poignant exploration of Palestinian experiences through the lens of architecture, art, and storytelling. Held in the Event Kitchen at Te Puna, this performance transformed the space into a platform for cultural exchange and dialogue. Through a captivating blend of poetry, music, and theatrical elements, the performance illuminated the resilience and struggles of the Palestinian people. Unitec has responded proactively by adopting Te Noho Kotahitanga and welcoming the 'Window of Palestine' performance in the Eid Celebration, demonstrating a commitment to fostering cultural understanding and inclusivity.
ROLES: Sameh Shamout was author director main perfromer and singer & Abigail Spence was co-author
Therapeutic reduction mammoplasty in large-breasted women with cancer using superior and superomedial pedicles
No full textAdel Denewer,1 Fayez Shahatto,1 Waleed Elnahas,1 Omar Farouk,1 Sameh Roshdy,1 Ashraf Khater,1 Osama Hussein,1 Saleh Teima,2 Mohammed Hafez,1 Samir Zidan,1 Nazem Shams,1 Sherif Kotb11Surgical Oncology Department, Oncology Center, 2Clinical Oncology and Nuclear Medicine Department, Mansoura University, Mansoura, EgyptBackground: Surgical management of breast cancer in large-breasted women presents a real challenge. This study aims to evaluate the outcome of therapeutic reduction mammoplasty in large-breasted women with breast cancer using superior and superomedial pedicles, situated at any breast quadrant except for the central and upper medial quadrants.Methods: Fifty women with breast cancer and large breasts underwent simultaneous bilateral reduction mammoplasty. The weight of the tissue removed ranged from 550 g to 1050 g and the tumor-free safety margins by frozen section were in the range of 4 cm to 12 cm.Results: The age of the patients ranged from 36 to 58 (median 43) years and tumor size ranged from 1 cm to 4 cm. The cosmetic outcomes were excellent in 32 patients (64%), good in 15 (30%) patients, and fair in three patients (6%). The follow-up period was 8–36 (mean 20) months, with no local recurrence or systemic metastasis.Conclusion: Therapeutic reduction mammoplasty using superior and superomedial pedicles was shown to be oncologically safer than traditional conservative surgery. This oncoplastic procedure yields a satisfactory esthetic outcome with lower morbidity in large-breasted women with breast cancer.Keywords: breast cancer, oncoplastic surgery, reduction mammoplasty, conservation surger
Signatures, rights, networks: Iranian feminism in the transnational sphere
No full textMy dissertation explores how Iranian feminists are mobilizing new discourses and
creating dynamic transnational networks, enabled in part by cyber and print cultures. I
investigate the ways in which Iranian feminist praxis consequently disrupts and reframes
the putative opposition between secularism and Islam, and the multiple binaries
assembled through this opposition—democratic versus authoritarian; liberatory versus
oppressive; egalitarian versus patriarchal; and modern versus backwards. Within a multimethodological and interdisciplinary framework, I examine three sites of Iranian feminist activism. I consider the One Million Signatures Campaign, a grassroots feminist
movement that emerged in Iran in 2006, which utilizes Islamic human rights discourses
and grassroots, democratic practices to engage the state in reforming family law. I also
investigate the transnational network structure of the campaign, reflecting on the
particular praxis offered by campaigners in the Iranian diaspora. Finally, I examine the
writings and reception of Nobel Peace Prize winner Shirin Ebadi. As a Muslim, feminist and human rights activist, Ebadi emphasizes the compatibility of Islam with human
rights, thereby disrupting discourses that counterpoise them. Considered together, these three sites of Iranian feminism destabilize Western hegemony over Iran, consolidated through discourses which pit “superior” liberal democracies over “backward” Islamic nations. This oppositional staging gains purchase through geopolitical relations of power, including some iterations of global feminism,
which deploy neocolonial saving and rescue narratives in the name of women’s human
rights. Concomitantly, transnational feminist theory, which has destabilized the
normative authority of Western hegemony and global feminism, can also often reify the
very power relations it seeks to critique. By emphasizing the dangers, limits, and
dilemmas of transnational feminist work, transnational feminist theory can neglect
critical feminist projects on the ground, effectively writing some women out of history.
My dissertation considers how Iranian feminists in Iran and the diaspora challenge these various modes of epistemic silencing. Through a close examination of the praxis of Iranian feminists, reflected primarily through the narratives of the activists themselves,
my dissertation contributes to feminist theories of agency and helps revitalize
transnational feminist studies.Ph. D.Includes bibliographical referencesIncludes vitaby Catherine Zehra Same
Safety and esthetic outcomes of therapeutic mammoplasty using medial pedicle for early breast cancer
No full textSameh Roshdy,1 Osama Hussein,1 Ashraf Khater,1 Mohammad Zuhdy,1 Hend A El-Hadaad,2 Omar Farouk,1 Ahmad Senbel,1 Adel Fathi,1 Emadeldeen Hamed,1 Adel Denewer1 1Department of Surgical Oncology, Mansoura Oncology Center, 2Department of Clinical Oncology and Nuclear Medicine, Faculty of Medicine, Mansoura University, Mansoura, Egypt Background: Although therapeutic mammoplasty (TM) was introduced for treatment of localized ductal carcinoma in situ and invasive breast carcinoma (stages I and II) in females with large breast size, the suitability of medial pedicle TM for treatment of breast tumors at different locations has not been established. The objective of this study was to assess the safety and esthetic outcome of medial pedicle TM for breast tumors at different locations. Methods: The study was conducted from February 2012 to July 2014. Consecutive patients with early breast carcinoma with medium- and large-sized breasts, with or without ptosis, who were offered medial pedicle TM were included in the study. Patients who were not candidates for breast-conserving surgery or those with tumors located along the medial pedicle were excluded. All patients received immediate postoperative adjuvant chemoradiotherapy. Results: Thirty patients with a mean age of 48.5 years received medial pedicle TM in the breast harboring the tumor or, additionally, the other breast (N=14). The tumors were in the upper (60.0%), lower (26.7%), and lateral (13.3%) quadrants. Minor complications occurred in five cases (5/30, 16.7%) in the ipsilateral and in two (2/14, 14.3%) contralateral breasts. No wound dehiscence or areolar necrosis was recorded. A total of 22 (73.3%) patients were scored as excellent cosmesis. After a median follow-up of 20 months, no locoregional recurrence or distant metastases were observed. Conclusion: TM using a medial pedicle is a safe and appealing technique among women with tumors at different locations. Keywords: therapeutic mammoplasty, medial pedicle, breast cancer, mastectom
Multiprocessor sparse SVD algorithms and applications
No full textIn this thesis, we develop four numerical methods for computing the singular value decomposition (SVD) of large sparse matrices on a multiprocessor architecture. We particularly consider the SVD of unstructured sparse matrices in which the number of rows may be substantially larger or smaller than the number of columns. On vector machines, considerable progress has been made over the past 10 years in developing robust algorithms for the solution of the sparse symmetric eigenvalue problem using Lanczos (with or without re-orthogonalization) and subspace iteration methods. Our intent is to extend and refine this knowledge for computing the sparse singular value decomposition on a parallel computer. We emphasize Lanczos, block-Lanczos, subspace iteration, and trace minimization methods for determining several of the largest (or smallest) singular triplets (singular values and corresponding left- and right-singular vectors) for sparse matrices arising from certain practical applications. The target architectures for implementations of such methods include the Alliant FX/80 and the Cray-2S/4128. This algorithmic research is particularly motivated by recent information-retrieval techniques in which high-rank approximations to large sparse term-document matrices are needed, and by nonlinear inverse problems arising from seismic reflection tomography applications.Made available in DSpace on 2011-05-07T12:11:32Z (GMT). No. of bitstreams: 2
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PARASPICE: A parallel direct circuit simulator for shared-memory multiprocessors
No full textA general approach to parallelizing direct method circuit simulation has been developed via novel algorithms. The approach extracts parallel tasks at the algorithmic level for the three most compute-intensive modules: device model evaluation (LOAD), direct solution of sparse linear systems (SOLVE), and local truncation error estimation (TRUNC), which account for at least 95 percent of the total job time. Therefore, it is suitable for a wide range of shared-memory multiprocessors. The implementation of the approach in SPICE2 resulted in a portable parallel direct circuit simulator, PARASPICE. The superior performance of PARASPICE is demonstrated on an eight-CE Alliant FX/80 using a number of benchmark circuits.The success of PARASPICE lies particularly in the SOLVE module, where the solution of a sequence of structurally identical sparse matrices are required. In this dissertation, a class of new algorithms has been systematically developed via a unified model for parallel sparse matrix computation. This model, which explores the parallelism issue in the pivoting schemes, extracts parallel tasks from the solution procedure by exploiting the sparse structure of the matrix. These algorithms have been implemented in DSPACK, a software package for the direct solution of general sparse matrices. Experiments with DSPACK on the Boeing-Harwell collection of benchmark matrices have shown high overall speedup. DSPACK has been successfully used as a workbench to design parallel sparse solvers for circuit simulation.Made available in DSpace on 2011-05-07T11:53:02Z (GMT). No. of bitstreams: 2
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Numerical Study for Progressive Failure of High Rise Stepped Steel Building
No full textAbstract: Progressive collapse of a structure happens when one or more primary members are suddenly lost due to an unfortunate accident such as a gas explosion, bomb attack, fire, or overloaded. Building irregularity is one aspect that might aggravate the damage caused by gradual failure. The progressive failure of high rise stepped frames was investigated using 3-dimensional modelling and the finite element approach in this paper. The steel structure has 30 stories and rigid moment-resisting steel frames. Abaqus software is used to perform nonlinear dynamic analysis in accordance with GSA criteria. The results of Abaqus model are verified with an experimental data and good agreement is achieved. The structural behaviour of the building under sudden column loss was studied in detail using this model for several scenarios of column removal.
Keywords: Progressive failure; Nonlinear dynamic analysis; High rise steel building; Finite element; Column removal.
Title: Numerical Study for Progressive Failure of High Rise Stepped Steel Building
Author: Mohamed Basel Emara, Sameh Moustafa Gaawan, Mahmoud Shahat Mahmoud, Mohamed Mohamed Yahia
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
Vol. 10, Issue 1, April 2022 - September 2022
Page No: 110-118
Research Publish Journals
Website: www.researchpublish.com
Published date: 20-June-2022
DOI: https://doi.org/10.5281/zenodo.6670584
Paper Download Link (Source)
https://www.researchpublish.com/papers/numerical-study-for-progressive-failure-of-high-rise-stepped-steel-buildingInternational Journal of Civil and Structural Engineering Research, ISSN 2348-7607 (Online), Research Publish Journals (Publisher), Website: www.researchpublish.co
Some new results for solving linear systems arising from computational fluid dynamics problems
No full textIn this thesis, we consider the numerical solution of four kinds of linear systems: saddle-point problems, Stokes problems, symmetric systems (positive definite or indefinite), and unsymmetric systems. These systems are related, and all of them arise from the numerical solution of partial differential equations. For saddle-point problems, we introduce a class of expansion methods based on a new solution representation of the general problem. Many difficult computations involved in Uzawa and projection type methods for saddle-point problems are avoided in our approach. For the Stokes problems, by introducing a new variable, we split the linear system into several smaller systems according to its sparse structure. This new variable is then updated so that the split systems eventually produce the solution of the original problem. For symmetric systems that are indefinite and do not have a special sparse structure like saddle-point problems, we propose a class of nested iterative methods to handle them. We study how the convergence rate of the outer iteration is related to the convergence rate of the inner iterations. For symmetric positive definite systems, we propose a class of nested preconditioners and analyze properties of these preconditioners. Some necessary and sufficient conditions for the optimality of these nested preconditioners are established. Finally, for unsymmetric systems, we generalize the concept of spectral equivalence for symmetric positive definite systems to these general systems. We also study some properties of spectrally equivalent matrices and consider their applications for constructing efficient iterative methods.Made available in DSpace on 2011-05-07T14:09:03Z (GMT). No. of bitstreams: 2
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