Predictive Uncertainty-based Bias Mitigation in Ranking

Societal biases that are contained in retrieved documents have received increased interest. Such biases, which are often prevalent in the training data and learned by the model, can cause societal harms, by misrepresenting certain groups, and by enforcing stereotypes. Mitigating such biases demands algorithms that balance the trade-off between maximized utility for the user with fairness objectives, which incentivize unbiased rankings. Prior work on bias mitigation often assumes that ranking scores, which correspond to the utility that a document holds for a user, can be accurately determined. In reality, there is always a degree of uncertainty in the estimate of expected document utility. This uncertainty can be approximated by viewing ranking models through a Bayesian perspective, where the standard deterministic score becomes a distribution. In this work, we investigate whether uncertainty estimates can be used to decrease the amount of bias in the ranked results, while minimizing loss in measured utility. We introduce a simple method that uses the uncertainty of the ranking scores for an uncertainty-aware, post hoc approach to bias mitigation. We compare our proposed method with existing baselines for bias mitigation with respect to the utility-fairness trade-off, the controllability of methods, and computational costs. We show that an uncertainty-based approach can provide an intuitive and flexible trade-off that outperforms all baselines without additional training requirements, allowing for the post hoc use of this approach on top of arbitrary retrieval models

The Effects of Hibiscus sabdariffa and Salvia officinalis Aqueous Extracts on Reproductive Function, Antioxidant Status, and Epididymal Sperm Quality in Male Rats

Background: Phytoestrogens are non-estradiol molecules categorized as endocrine-disrupting chemicals, which means they can alter the hormonal equilibrium and cause reproductive problems. Studies suggested Hibiscus sabdariffa (H. sabdariffa) possible use as alternative to hormone replacement therapy in ovarian hypofunction patients. Salvia officinalis (S. officinalis) contains phytoestrogen steroids and isoflavonoids. The purpose of this research was to examine the estrogenic effects of H. sabdariffa and S. officinalis aqueous extracts on male reproductive hormones and testicular histology and function.Methods: Three groups of six male rats each were utilized as follows: control (distilled water),  H. sabdariffa (500 mg/kg aqueous extract), and S. officinalis (500 mg/kg aqueous extract). Blood, epididymis. Testis and serum samples were gathered after 30 days for biochemical analysis, sperm characteristics, and histological evaluations.Results: Compared to the control and S. officinalis groups, H. sabdariffa caused a significant reduction in body weight (BW) and percent BW gain (%BWG). Relative to the control rats, the two extracts dramatically reduced testicular weight, sperm motility, concentration, and viability while raising abnormalities. Furthermore, the herbal extract groups demonstrated a significant decrease in blood testosterone levels while increasing serum prolactin, FSH, and LH levels. Consumption of both herbs also caused testicular histological changes such as degenerated seminiferous tubules, with a diminished number of mature spermatozoa in the tubular lumen, reduced diameter of seminiferous tubules, and the presence of exfoliated cells in the tubular lumen.Conclusion: The results of this study revealed that the aqueous extracts of H. sabdariffa and S. officinalis may negatively impact male fertility. However, more research is needed to validate these findings and investigate the mechanistic components of these impacts.Keywords: Hibiscus sabdariffa (H. sabdariffa); Salvia officinalis; Male fertility; Testosterone; FSH; LH; Prolactin; Testicular histology Humid subtropical climate; ITS; nrDNA; Taxonomy 

Pattern of Young and Old Onset Rheumatoid Arthritis (YORA and EORA) Among a Group of Egyptian Patients with Rheumatoid Arthritis

Objective Rheumatoid arthritis (RA) differs depending on the age of disease onset. The differences between EORA and YORA are important because they have clinical and therapeutic implications. Method 1185 patients were ranked after classification according to age at onset of the disease into YORA I (16–40 years), YORA II (41–60 years) and EORA >60 years. All patients groups were compared, based on disease duration, disease activity, severity parameters and drug history. Results YORA I included 298 patients, 28.85% were males, with mean age of 29.4 ± 6 years and disease duration 4 ± 3.3 y, YORA II included 539 patients, 33.77% males, age 49.7 ± 6.1 y and disease duration 6.5 ± 5.6 y. EORA included 348 RA patients 40.5% males, age 67.1 ± 6.6 y, disease duration 9.95 ± 7.2 y. Activity was increased in EORA compared to YORA I and YORA II, while severity decreased in EORA. ESR, CRP and degree of anemia were higher in EORA. RF titer was higher in YORA. Small joints of the hands and feet were more involved in YORA, while, large joints in EORA. Rheumatoid nodules were increased in YORA I than EORA P = 0.04. Polymyalgia rheumatica was exclusively present in EORA group 25 patients 7.2%. Methotrexate was used in both YORA and EORA, with a higher mean of dosage in YORA than EORA. Multiple DMARDs in EORA was 57.9%, and biologics in 0.8% was which was significantly lower compared with YORA I, 86.3% and 1.7%, with P = 0.001. Conclusion EORA has more active and less disabling and affects more males than YORA. The use of biologic therapy and combination DMARD therapy was less in EORA

Loneliness among women with rheumatoid arthritis:A cross-cultural study in the Netherlands and Egypt

The objective of this study was to explain loneliness as experienced by women with rheumatoid arthritis (RA) in a cross-cultural context. We studied 36 Egyptian female RA patients and 140 female Dutch RA patients.. Self-report data were collected about loneliness, physical and psychological health status, social support and social network, needs for help, attitudes and feelings of guilt. Loneliness was significantly higher among Egyptian (44.2 ± 32.3) than Dutch (12.9 ± 18.9) female RA patients (F = 54.3, p < 0.001). In Egypt, 36% of the variance of loneliness could be explained by worse affect (anxiety and depression; β = 0.51), fewer children (β = 0.31), and higher negative social support for the patients (β = 0.28) in multiple regression analysis. In the Netherlands, 35% of feeling lonely could be explained by worse affect scores (β = 0.52), less positive social support for the patients (β = 0.24), and a higher degree of disability (β = 0.21). Age of the patients and disease duration only explained 4% and 3% of the loneliness of RA patients in Egypt and the Netherlands, respectively. Female Egyptian RA patients experienced more loneliness than Dutch patients. Affect is the most important and constant variable in explaining loneliness in both countries. The role of the family in perceived loneliness is greater in Egypt than the Netherlands. Low social support received by patients is important in explaining loneliness in the Netherlands but not in Egypt

Lead Level in Pregnant Women Suffering from Pre-eclampsia in Dakahlia, Egypt

Abstract Background: Lead toxicity is a prevalent health problem in both developed and develop

Mast Cell-Derived Histamine Mediates Cystitis Pain

Background: Mast cells trigger inflammation that is associated with local pain, but the mechanisms mediating pain are unclear. Interstitial cystitis (IC) is a bladder disease that causes debilitating pelvic pain of unknown origin and without consistent inflammation, but IC symptoms correlate with elevated bladder lamina propria mast cell counts. We hypothesized that mast cells mediate pelvic pain directly and examined pain behavior using a murine model that recapitulates key aspects of IC. Methods and Findings: Infection of mice with pseudorabies virus (PRV) induces a neurogenic cystitis associated with lamina propria mast cell accumulation dependent upon tumor necrosis factor alpha (TNF), TNF-mediated bladder barrier dysfunction, and pelvic pain behavior, but the molecular basis for pelvic pain is unknown. In this study, both PRV-induced pelvic pain and bladder pathophysiology were abrogated in mast cell-deficient mice but were restored by reconstitution with wild type bone marrow. Pelvic pain developed normally in TNF- and TNF receptor-deficient mice, while bladder pathophysiology was abrogated. Conversely, genetic or pharmacologic disruption of histamine receptor H1R or H2R attenuated pelvic pain without altering pathophysiology. Conclusions: These data demonstrate that mast cells promote cystitis pain and bladder pathophysiology through the separable actions of histamine and TNF, respectively. Therefore, pain is independent of pathology and inflammation, an

Factors Affecting Quality of Audit; Empirical Evidence from Iran

This study examines factors affecting quality of audit using empirical evidence from Iran Quality of audit was seen as the degree to which an audit report is free from deficiencies and distortions which show up later on. The quality of an audit was measured in terms of an auditor’s ability to report financial distortions willingly and neutrally. The study acknowledges the positive association between audit quality and audit firm size in existing literature. Though cost of quality has been used as surrogate for measuring quality of audit, this study explores and examines three other variables. The study therefore measures four variables by testing four hypotheses namely,H1: how the existing rules and regulations affect the auditor’s willingness to report distortions neutrallyH2: how the lack of contract benefits (cost) affects the auditor’s willingness to report distortions neutrallyH3: how market mechanisms in the operational environment affects the auditor’s willingness to report distortions neutrallyH4: how audit firm size relates to the auditor’s ability to report financial distortions neutrally.The results of the study indicated that oversight rules and regulations as well as market mechanisms in the operational environment affected the auditor’s willingness to report important distortions neutrally (p). Furthermore, (H2) the lack of contract benefit (cost) did not significantly affect the auditor’s willingness to report distortions neutrally