Investigation The Weather Effects on The Sound Absorption Coefficients in Cinjar City

In this work , the absorption coefficients A? had determined for different acoustic source by the air atmosphere for one day in Cinjar city, based on an analytical method which employed on several empirical equations that taking in consideration the various meteorological conditions in which the climate elements changed in additional to frequencies sources .The results shows the atmospheric absorption is sensitive to the composition of air , particularly to the wide varying concentration of water vapor and temperature where the air temperature play and frequency variation are dominate that controlling the values of A?

Improvement of Gas Turbine Performance Using Multi-Stage Inlet Air Cooling System

Gas turbines play a significant role as an energy source if it has been designed according to the ISO operating conditions taking into consideration the operating conditions varied with the variation of the ambient conditions. This work aims to determine the effect of many parameters like the temperature at the compressor inlet, relative humidity, pressure ratios, and polytropic efficiency on each component of gas turbine performance (compressor, combustion chamber, and turbine). In this work, the Engineering Equation Solver (EES) software is used to calculate exergy destruction, net power, and all efficiencies (1st law and 2nd efficiency). After that, the validation of the code generated through EES software is performed using the actual performance data from the Heliopolis gas turbine power plant 25 MW. model, (GE GT-TM) made by GE. The results show the performance of the overall gas turbine behaves with and without a multi-stage cooling system.  In addition, the effect of using the new inlet air cooling system on the gas turbine performance improvement under different conditions is determined. It is worth mentioning that the maximum power output increase is about 14.3% at the maximum ambient temperature (313oK). While the change of the 1st low efficiency and the 2nd low efficiency are so small it could be neglected. Also, the results illustrate that first and second law efficiencies provide quantitative and qualitative compressor performance assessments. The present multi-stage cooling system reduces the back-period cost if it uses a chiller system. Adding a chilling system before the fogging cooling system reflects the downsizing of the chilling system. This means low initial capital investment costs and low total annual costs. In addition, the multi-stage cooling system capital cost will be cashback during the first year regarding recovered power pric

PREPARATION AND OPTICAL PROPERTIES OF SeS THIN FILMS SEMICONDUCTING CHALCOGENIDE GLASSES

Se 1-x S x glassy films have been prepared in the thin films form with x in the range 0.0-0.4 and thickness in the range 500-600 nm by thermal vacuum evaporation technique. The amorphous structure of the films was confirmed by XRD measurements. The surface morphology and the thickness of the films were studied by SEM. The optical properties of the films were studied by transmittance method, it was found that the optical constants of the films are sensitive to composition. The refractive index was determined and the data was discussed in the Wemple and DiDomenico model for single effective oscillator. The resultant oscillator energy and strength were then calculated and found to be increased as the composition increases. A blue shift in the absorption edge was observed by increasing the sulfur content and the band gap increases from 1.85 to 2.03 eV as the composition increases from 0.0 to 0.4

Fertility and pregnancy outcomes following uterine artery embolization (UAE) for uterine arteriovenous malformation (AVM)

A 19-year-old patient presented with intractable uterine bleeding, 11 weeks post-abortion. A pelvic ultrasound with Doppler and color imaging suggested a uterine arteriovenous malformation. Failing conservative therapies, the patient consented to uterine artery embolization (UAE). Two months later, she conceived and had an uneventful normal vaginal delivery at term. Since this is an extremely rare condition, allowing limited clinical exposure and experience, there may be an underlying reluctance by general practitioners to treat these cases with uterine artery embolization for fear of compromising future fertility and pregnancies. However, data from the 20 pregnancies embolized for uterine AVM cited in the present report and data from embolization for uterine fibroids indicate that such fears may be unfounded since pregnancy rates and outcomes may not be compromised after UAE. © 2009 Springer-Verlag

Comparison Between the Effects of Straight And Hook Steel Fibers on Fresh and Hardened Characteristics of Concrete

This research looked into how steel fiber type and concentration influence Steel Fiber Reinforced Concrete (SFRC) mechanical properties. According to tests, the percentage of steel fibers in SFRC is directly related to compressive, flexural, splitting tensile, and direct tensile strength. Straight and hooked steel fibers with the same aspect ratio, 13 mm in length and 0.2 mm in width of straight steel fibers, and 35 mm long and 0.55 mm wide hook-end steel fibers were utilized. Three different percentages of fiber were used: 0.5, 1, and 1.5% by volume. Seven variants of concrete with different types and different percentages of steel fiber were created and evaluated. At 0.5, 1.0, and 1.5% fiber content, the compressive strength of a cube reinforced with hook steel fibers increased by 1.41, 11.52, and 20.81%, respectively, while the compressive strength of a cube reinforced with straight steel fibers increased by 7.27 and 20%, and 21.4% for the same percentages of steel hooked fiber. This indicates that the straight steel fibers are more effective than the hook steel fibers when increasing the compressive strength of the (SFRC). This means that (pressure force increases, albeit gradually). The concrete's splitting tensile strength may be significantly increased by introducing straight and hook steel fiber into the mixture. The tensile strength is improved by (52.78, 69.44, 122.22%) and (44.44, 62.8, 94.44%) when compared to the control concrete sample. Straight steel fibers increased flexural strength by (44.23, 61.54, 86.54%) compared to the control sample, and hook steel fibers increased flexural strength by (11.54, 28.85, 55.77%). When straight fibers are introduced to the control concrete sample, the direct tensile strength increases by about (54.17, 87.5, 162.5) %, and when hook fibers are added, the direct tensile strength increases by (45.83, 75, and 150%)

Postablation endometrial carcinoma

Background: Many women have undergone both resectoscopic and nonresectoscopic (or global) endometrial ablation (EA) during the past 20 years. These women are now approaching their sixth and seventh decades of life, a time frame in which endometrial carcinoma (EC) is most frequently diagnosed. Database: In several reports, surgeons have expressed concern that endometrial ablation may leave a sequestered island of EC that may escape detection, possibly delaying its diagnosis or causing it to appear at an advanced stage. Others suggest that EA artifact does not hinder the evaluation and treatment planning in the presence of EC. Data bases used are from Medline and PubMed. Discussion: We introduce 6 new cases of postablation endometrial carcinoma (PAEC), 4 of which occurred after the introduction of global endometrial ablation (GEA) techniques. In addition, we examine several key questions regarding the impact of EA on the subsequent development of EC, including the manner in which PAEC presents, the efficacy of traditional diagnostic modalities, the ablation-to-cancer interval, and the stage of PAEC at the time of diagnosis. Finally, we explore the use of reoperative hysteroscopic surgery (RHS) as a diagnostic modality and address the possible role ultrasound surveillance as a screening method for women at risk of EC

Long-term clinical outcomes of repeat hysteroscopic endometrial ablation after failed hysteroscopic endometrial ablation

The study aims to describe patient characteristics, uterine cavity shape and histopathology, complications, and long-term clinical outcomes of women who failed hysteroscopic rollerball or loop endometrial ablation (HEA) and subsequently consented to repeat hysteroscopic endometrial ablation (RHEA), and is a retrospective cohort study (Canadian Task Force classification II-2). The study was conducted in the university-affiliated teaching hospital. Patients included women who failed primary hysteroscopic endometrial ablation (PHEA, n = 183) and subsequently underwent RHEA by the senior author (GAV) from 1993 through 2007 with a minimum follow-up of 5 years. RHEA was performed under general anesthesia using 26 F (~9 mm) resectoscope, monopolar loop electrode in 136 (74.3 %), 3–5 mm rollerball in 41 (22.4 %) or combination in 6 (3.3 %) women. Patient characteristics, uterine cavity, and clinical outcomes of women who failed PHEA and subsequently consented to RHEA were evaluated by retrospective chart review and patient follow-up including office visits and/or telephone interview. The corresponding median age (range) for PHEA and RHEA was 40 (26–70) and 43 (29–76) years. Indications for PHEA included abnormal uterine bleeding (AUB, 52.7 %), AUB and dysmenorrhea (25.8 %), dysmenorrhea (18.8 %), and others (2.7 %). Indications for RHEA included persistent AUB (53 %), AUB and uterine/pelvic pain (26.2 %), uterine/pelvic pain only (19.1 %), postmenopausal bleeding (1.1 %), and thickened endometrium (0.5 %). Complications of RHEA (n = 7, 3.8 %) included false passage (3), uterine perforation (2), and bleeding (2). One patient with excessive bleeding required immediate hysterectomy. At a median follow-up of 9 years (5–19), 69 % of women avoided hysterectomy. Repeat hysteroscopic endometrial ablation is a feasible, safe, and long-term effective alternative to hysterectomy for abnormal uterine bleeding from benign causes when performed by experienced surgeons

Impact of the COVID-19 Pandemic on Access to Fertility Care: A Retrospective Study at a University-Affiliated Fertility Practice

Objective: To elucidate the impact of the COVID-19 pandemic on access to fertility services. Methods: A retrospective quality improvement study was conducted at a university-affiliated fertility practice in southwestern Ontario. Annual procedural volumes for intrauterine and donor inseminations (IUI/DI), in vitro fertilization and intracytoplasmic sperm injections (IVF/ICSI), and frozen embryo transfers (FET) during the COVID-19–affected year were compared with mean annual volumes from the 2 preceding years. In addition, volumes for the same procedures were compared between the first quarter of 2021 and mean first quarter volumes from 2018 to 2019. Piecewise linear regressions were conducted to evaluate whether any changes in monthly procedural volume were attributable to the COVID-19 pandemic. Results: In 2020, our fertility practice attained the mean annual volumes of 89.7% for IUI/DI, 69.0% for IVF/ICSI, and 60.6% for FET. In contrast, in 2021, we performed mean first quarter volumes of 130.1% for IUI/DI, 164.3% for IVF/ICSI, and 126.8% for FET. The slopes of the pre- and post–COVID-19 segments of the piecewise linear regressions were significantly different for IUI/DI (P \u3c 0.001) and IVF/ICSI (P = 0.001), but not for FET (P = 0.133). Conclusion: The COVID-19 pandemic resulted in decreased annual volumes of medically assisted reproductive procedures at a university-affiliated fertility practice in southwestern Ontario. Impact on monthly procedural volume was confirmed for IUI/DI and IVF/ICSI by linear regression. Local adaptations helped compensate and exceed expected volumes in 2021. As a result, the COVID-19 pandemic resulted in a short-lived limitation in access to fertility care

Corrigendum to ‘Guideline No. 412: Laparoscopic Entry for Gynaecological Surgery’ [Journal of Obstetrics and Gynaecology Canada 43 (2021) 376−389](S1701216320310343)(10.1016/j.jogc.2020.12.012)

The authors regret that the print version of this article contained the incorrect reference 51. Reference 51 should have been: Bernante P, Foletto M, Toniato A. Creation of pneumoperitoneum using a bladed optical trocar in morbidly obese patients: technique and results. Obes Surg. 2008 Aug;18(8):1043-6. doi: 10.1007/s11695-008-9497-8. The online version of the article has now been corrected The authors would like to apologize for any confusion this caused. DOI of original article: https://doi.org/10.1016/j.jogc.2021.03.00

Detection of Herpes Viruses in Aggressive Periodontitis Patients in Mosul

The aim of the study is to estimate the frequency of herpes viruses HCMV, EBV1 and HSV in periodontal pocket samples of aggressive periodontitis patients. This study was carried out on total number of 24 Aggressive Periodontitis patients, 14 (58%) males and 10 (42%) females, aging between 20-?40 years old). Periodontal pocket samples were collected from three deepest pocket sites and nested PCR technique was used to detect HCMV, EBV and HS