Structured least squares with bounded data uncertainties

In many signal processing applications the core problem reduces to a linear system of equations. Coefficient matrix uncertainties create a significant challenge in obtaining reliable solutions. In this paper, we present a novel formulation for solving a system of noise contaminated linear equations while preserving the structure of the coefficient matrix. The proposed method has advantages over the known Structured Total Least Squares (STLS) techniques in utilizing additional information about the uncertainties and robustness in ill-posed problems. Numerical comparisons are given to illustrate these advantages in two applications: signal restoration problem with an uncertain model and frequency estimation of multiple sinusoids embedded in white noise. ©2009 IEEE

Multi-lingual and multi-cultural information literacy; perspectives, models and good practice

Purpose This paper reviews current approaches to, and good practice, in information literacy development in multi-lingual and multi-cultural settings, with particular emphasis on provision for international students. Design/methodology/approach A selective and critical review of published literature is extended by evaluation of examples of multi-lingual information literacy tutorials and MOOCs. Findings Multi-lingual and multi-cultural information literacy are umbrella terms covering a variety of situations and issues. This provision is of increasing importance in an increasingly mobile and multi-cultural world. This article evaluates current approaches and good practice, focusing on issues of culture vis a vis language, the balance between individual and group needs, specific and generic information literacy instruction, and models for information literacy, pedagogy and culture. Recommendations for good practice and for further research are given, Originality/value This is one of very few articles critically reviewing how information literacy development is affected by linguistic and cultural factors

Supplementary Material for: A Retrospective analysis of 83 patients with testicular mass who underwent testis-sparing surgery: The Eurasian Uro-oncology Association Multicenter Study*

ABSTRACT Introduction: Herein,we analyzed the histopathological, oncologic and functional outcomes of TSS in patient with distinct risk for testicular cancer. Methods: This is a multicenter retrospective study on consecutive patients who underwent TSS. Patients were categorized in high- or low-risk Testicular Germ Cell Tumor(TGCT) according to the presence/absence of features compatible with Testicular Dysgenesis Syndrome(TDS). Histology was categorized per size and risk groups. Results: TSS was performed in 83 patients(86 tumors) of them, 27 in the high-risk group. Fifty-nine patients had a non-tumoral contralateral testis present. Sixty masses and 26 mases were benign and TGCTs respectively. No statistical differences were observed in mean age(30.9±10.32 years), pathological tumor size(14.67 ± 6.7 mm) between risk groups or between benign and malignant tumors(p=0.608). When categorized per risk groups 22(73.3%) and 4(7.1%) of the TSS specimens were malignant in the high- and low-risk patient groups respectively.Univariate analysis showed that the only independent variable significantly related to malignant outcome was previous history of TGCT. During a mean follow-up of 25.5±22.7 months no patient developed systemic disease. Local recurrence was detected in 5 patients and received RO. Postoperative testosterone levels remained normal in 88% of those patients with normal preoperative level. No ED was reported in patients with benign lesions. Conclusion: TSS is a safe and feasible approach with adequate cancer control and preservation of sexual function is possible in 2/3 of patients harboring malignancy. Incidence of TGCT varies extremely between patients at high and low risk for TGCT requiring a careful consideration and counseling