Impact of the mechanical characteristics of weak rocks and trona ore beds on the main drift deformation at the beypazari mine, Turkey

In northern Turkey, the Main Drift, T-2000, and a roadway, T-3000, were excavated for Beypazari trona (natural soda) underground mine project between the years 1999 and 2001. This work was one of the most important mining projects in Turkey in the last decade. T-2000 was designed as a main drift with a length of 965 m, 14degrees inclined and excavated with a cross-sectional area of 18 m(2). The T-3000 roadway was driven in the trona beds for the first production panel. In this study, in situ and laboratory studies have been made to define the formations through which the drift has been driven. In situ engineering geology measurements were carried out consisting of field observation, mapping, boreholes and laboratory tests on samples collected from the trona field and the boreholes. After drift excavation and support installation, the deformations and the loads on the supports were measured. As a result of this study, the deformational characteristics of the trona ore beds and weak rocks and their effect on the main drift (T-2000) deformation have been determined. The importance of this study lies in the fact that most natural soda mines in the world apply room and pillar mining methods. This study is probably the first investigation on underground openings with steel-set support systems and rock deformations in natural soda beds. (C) 2004 Elsevier Ltd. All rights reserved

Prof. Dr. Arslan Tunçbilek ve Türkiye’de iş ve işçi sağlığı

Ankara : İhsan Doğramacı Bilkent Üniversitesi İktisadi, İdari ve Sosyal Bilimler Fakültesi, Tarih Bölümü, 2017.This work is a student project of the The Department of History, Faculty of Economics, Administrative and Social Sciences, İhsan Doğramacı Bilkent University.by Öztürk, İbrahim Mert

What are the probable predictors of urinary incontinence during pregnancy?

Objectives. The frequency, predisposing factors and impact of urinary incontinence (UI) on quality of life (QoL) during pregnancy were investigated. Materials and Method. A preliminary cross-sectional survey was studied among pregnant women between January and July of 2014. A total of 132 pregnant women were recruited using a questionnaire form for sociodemographic features, the Turkish version of the International Consultation on Incontinence-Short Form (ICIQ-SF), for the characteristics of UI and Wagner’s Quality of Life scale to assess impact on QoL. p < 0.05 was set significant. Results.Urinary incontinence was present in 56 out of 132 pregnant women (42.4%, UI-present group): mean age, 26.7 ± 5.4y(p = 0.780); median height, 160 cm (min–max: 153–176, p = 0.037); median BMI, 28.7 kg/m2(min–max: 22.4–50.0, p = 0.881); urine leakage occurred per week once (n = 18, 32.1%), twice or thrice (n = 8, 14.3%); per day few times (n = 14, 25%), once (n = 5, 8.9%) and always (n = 8, 14.3%) with mainly a small amount of urine leakage (n = 33, 58.9%) or a moderate (n = 4, 7.1%). There were statistically significant relationships between QoL scores and frequency of UI (p = 0.002) or amount of leakage (p = 0.002). Impact on QoL scores ranged from mild (n = 33, 58.9%), moderate (n = 4, 7.1%) to severe (n = 4, 7.1%) levels in daily life. UI impacted the daily life activities of women by making them less likely to undertake activities outside their homes (23.2%), by affecting their working performance and friendships (8.9%), their daily home activities (7.1%), their general health status (12.5%), their sexual relations (12.5%), by making them more nervous or anxious (10.7%) and by the need to wear pads or protectors (25%). ANOVA, Tukey, and Tamhane tests as the minimal important difference model yielded significant relevance between statistical analyses and clinical outcomes by using standard deviations (p = 0.001, 0.001 and 0.005 respectively). The following features favored the occurence of UI: Age (OR = 0.845, 95% CI [0.268–2.669]), being a housewife (OR = 1.800, 95% CI [0.850–3.810]), anemia (OR = 0.939, 95% CI [0.464–1.901]), parity (OR = 0.519, 95% CI [0.325–0.829]), miscarriage (OR = 1.219, 95% CI [0.588–2.825]) and living in rural areas (OR = 1.800, 95% CI [0.887–3.653]). Height (p = 0, 037), educational status (0.016), miscarriage (0.002), parity (0.006) and place of living (0.020) were significant factors. Conclusions.Many pregnant women are suffering from UI, which warrants a significant public health consideration in the region. Age, height, being a housewife or graduation level higher than primary school, living in rural, parity, miscarriage, and anemia were the factors in favor of the onset of UI. The authors plan a health promotion program in the region according to the results in order to provide information to health caregivers, especially family physicians, and to educate women about the predictors of UI and pelvic floor exercises for primary prevention and secondary relief of UI during and after pregnancy and provide some hygienic supplies to the poor in this aspect

Effects Of Local Alendronate Administration On Bone Defect Healing. Histomorphometric And Radiological Evaluation In A Rabbit Model

Purpose: To performed a histomorphometric and radiological study to evaluate the effects of alendronate sodium administered locally in mandibular bone defects created in rabbits. Methods: Two circular defects 5 mm in diameter were created bilaterally in the mandibular corpus of 20 New Zealand rabbits (i.e., four defects per animal). Each defect received one of four treatments: no treatment (EC group), alendronate irrigation (AL group), autogenous bone grafting (AG group), or alendronate irrigation with autogenous bone grafting (AL+AG group). Histomorphometric and radiological assessments were conducted at 4 and 8 weeks after surgery. Results: Between-group comparisons of the new bone area, the value of the AL+AG group was significantly lower thanthe remaining three groups at 4 weeks postoperatively. In all groups, the new bone area was significantly larger at 8 weeks than at 4 weeks. The residual graft area at 4 and 8 weeks was significantly higher in the AL+AG group than in the AG group, although it was significantly smaller at 8 weeks than at 4 weeks in both these groups. Conclusion: The use of alendronate sodium in conjunction with autogenous bone grafting improves the osteoconductive properties of the graft, enhances graft retention in the defect, and improves ossification.WoSScopu