A Novel Hierarchical Extreme Machine-Learning-Based Approach for Linear Attenuation Coefficient Forecasting.

The development of reinforced polymer composite materials has had a significant influence on the challenging problem of shielding against high-energy photons, particularly X-rays and γ-rays in industrial and healthcare facilities. Heavy materials' shielding characteristics hold a lot of potential for bolstering concrete chunks. The mass attenuation coefficient is the main physical factor that is utilized to measure the narrow beam γ-ray attenuation of various combinations of magnetite and mineral powders with concrete.

Pitfalls of using the ILO classification for silicosis compensation claims.

Background: The International Labour Organization (ILO) Classification of Radiographs of Pneumoconioses is used as the primary tool to determine compensation for pneumoconiosis in Turkey.

Aims: We aimed to evaluate how the ILO classification applied, but obtaining chest radiographs in the workplace for screening until the completion of compensation claim files by the referral centres, based on the ILO reading.

Methods: The study included 320 digital chest radiographs previously taken for screening from eight different ceramic factories and having finalised claim files by referral centres.

Simulation and prediction of the attenuation behaviour of the KNN-LMN-based lead-free ceramics by FLUKA code and artificial neural network (ANN)-based algorithm.

The significance and novelty of the present work are the preparation of the non-lead ceramic by the general formula of (1-x) KNa.NbO-xLa MnNiO (KNN-LMN) with different x (0 View Article and Find Full Text PDF

An extensive study on the neutron-gamma shielding and mass stopping power of (70-x) CRT-30KO-xBaO glass system for Cf neutron source.

The present study focuses on the charged-uncharged particles shielding performance of the addition of a mixed type of cathode ray tube (CRT) in a glass system that is irradiated by the Cf neutron source via the MCNPX simulation and analytical calculations, as well as Phy-X: PSD and SRIM software. The CRT waste glass is inserted into the glass system with (70-x) CRT-30KO-xBaO general formula for = 0, 10, 20 mol% that produces CG1, CG2, and CG3 glass shielding materials. Using Watt Fission Distribution (WFD) and Doppler Effect (DE) the neutron-gamma photon spectra were extracted for shielded (in the presence of the glass materials) and unshielded (in air) cases.

The prevalence of papilledema in patients with migraine: a crucial cooccurrence of migraine and idiopathic intracranial hypertension.

Objective: We aimed to investigate the prevalence of idiopathic intracranial hypertension (IIH) in patients with migraine by screening for papilledema.

Materials And Methods: We have included all the patients with migraine who applied to our neurology clinic during December 2019 and accepted to participate in the study. The demographic and clinical characteristics including migraine subtype (episodic/chronic), headache frequency per month, and headache characteristics of all patients were interrogated.

The impact of vaginal cone therapy on stress urinary incontinence compared with transobturator tape.

Objective: To emphasize the efficiency of vaginal cone (VC) therapy in stress urinary incontinence (SUI) through a comparison with transobturator tape (TOT).

Materials And Methods: A prospective randomized controlled study was conducted at the Etlik Zübeyde Hanım Maternity and Women Hospital during a one year study period. Forty women were allocated into two equal groups; those treated with VCs for a 3 month period, and women who underwent TOT procedures.

Performing the screw fixation from C3 to odontoid process in a patient with Klippel-Feil syndrome and type II odontoid fracture.

A 56-year-old female patient was admitted with a history of pain during neck movements after cervical injury. Computerized tomography scan revealed type II odontoid fracture and fusion anomaly between C2 and C3 vertebrae. At surgery, the anteroinferior part of C2 vertebra corpus could not be reached; therefore, transodontoid screw was advanced from C3 vertebra toward odontoid process.

The Utility of Feticide Procedure to Shorten the Induction-to-Abortion Interval in Medical Abortion.

Aim: To evaluate the effect of intracardiac potassium chloride feticide procedure (FP) on the induction-to-abortion (I-to-A) interval for various indications in the termination of pregnancy.

Method: Medically indicated abortions between 17 and 28 weeks' gestation were retrospectively evaluated and allocated into 2 groups: Cases with (group 1, n = 58) or without an FP (group 2, n = 60). I-to-A intervals were compared across the groups, considering different baseline parameters and fetal abnormality categories.

Results of the simultaneous measurements of radon around the Black Sea for seismological applications.

Results of measurements of radon around of the Black Sea are shown. Radon stations in zones of active faults were placed. Simultaneous hourly measurements of soil radon in 2005 were carried out in the Sivrice Fault Zone that is a segment of East Anatolian Fault System, in the town of Tbilisi (Georgia) and in the South Russia.

Cerebral ischaemia/reperfusion injury could be managed by using tramadol.

Objectives: No valid treatment modality that will repair stroke damage and provide neurological recovery has yet been identified in literature. Studies demonstrated that adequate quality of life could be provided if post-stroke pain could be treated sufficiently and timely. Besides its pain relief effects, tramadol has oedema-reducing and anti-inflammatory properties.

Effectiveness of the Biophysical Barriers to the Peridural Fibrosis in Rat Laminectomy Model.

Peridural fibrosis which could occur after the spinal surgery could adhere neural tissue closely and may cause to neural entrapment symptoms and require surgical reintervention. Present study was designed to reduce occurrence of peridural fibrosis in rat laminectomy model by using biophysical barriers called hyaluronic acid (HAS) dural barrier, activated polyethylene glycol and polyethylene imine (PEG) dural barrier, and platelet-rich plasma (PRP). In this study, 2 of 26 male Wistar albino rats (325-350 g body weight), which were not included into study groups were sacrificed by removing their total blood and their blood was used for preparation of PRP, and remaining rats were randomly delivered into four groups called SHAM, HAS, PEG, and PRP groups.

Prenatal diagnosis of Seckel syndrome at 21 weeks' gestation and review of the literature.

Background: The Seckel syndrome is an autosomal recessive inherited disorder that characterized severe pre- and post-natal growth restriction, microcephaly and a bird-like fetal head appearance. A few clinical reports revealed prenatal sonographic findings in the literature.

Case: A 29-year-old, Turkish, gravid 3, para 2, woman was referred to our center for further evaluation of a suspicion of microcephaly at 21 weeks' gestation.

Prediction of maternal near-miss in placenta previa: a retrospective analysis from a tertiary center in Ankara, Turkey.

Aim: To determine risk factors for severe complications during and after cesarean delivery (CD) in placenta previa (PP).

Methods: We reviewed retrospectively collected data from women with PP who underwent CD during a 6-year study period. We identified the complicated group based on the modified WHO near-miss criteria.

Can we consider cesarean myomectomy as a safe procedure without long-term outcome?

Aim: To investigate short- and long-term outcomes in women undergoing cesarean myomectomy (CM).

Methods: This was a retrospective study that explored short-term outcomes of women, who underwent cesarean operations with or without myomectomies (CM controls) in a single tertiary center throughout a 6-year-period. For long-term outcomes, the mean duration of follow-up was 6.

The relation between the extent of radiological findings and respiratory functions in pneumoconiosis cases of dental technicians who are working in Ankara.

Introduction: In dental technicians, parenchymal changes caused by dust affect pulmonary functions. The evaluation of the relation between radiological scores (chest X-Ray/HRCT) indicating the extent of pulmonary involvement and the severity of functional findings in dental technicians.

Materials And Methods: 440 dental technicians were evaluated with chest X-Ray, pulmonary function tests (PFTs) and high resolution computed tomography (HRCT).

A comparison of the effects of the most commonly used tocolytic agents on maternal and fetal blood flow.

Objective: To investigate the effects of two tocolytics, nifedipine and magnesium sulfate, on Doppler indices in maternal and fetal vessels.

Materials And Methods: We recruited 100 pregnant women with preterm birth between 24-36 gestational weeks who were admitted to our tertiary center over a two-year period. Patients were allocated to nifedipine (n=49) and magnesium sulfate (n=51) groups and Doppler indices of umbilical, middle cerebral, uterine arteries, and ductus venosus were measured before and after tocolysis.

Maternal serum ferritin as a clinical tool at 34-36 weeks' gestation for distinguishing subgroups of fetal growth restriction.

Objective: To compare maternal ferritin levels across pregnancies with fetal growth restriction including SGA and IUGR compared to appropriate for gestational age (AGA).

Methods: Three groups were enrolled: AGA, SGA (birth weight below 10th percentile for gestational age with no placental insufficiency findings), and IUGR (birth weight below 5th percentile for gestational age accompanied by abnormal umbilical artery Doppler waveforms and/or oligohydramnios). Maternal serum ferritin samples were obtained at gestational weeks 34 through 36, and delivery occurred at or beyond 36 weeks.

The evaluation of risk factors for failed response to conservative treatment in tubo-ovarian abscesses.

Objective: The aim of our study is to assess the risk factors for medical treatment failure and to predict the patients who will require the surgical therapy as well as to predict the factors affecting treatment success.

Material And Methods: This was a cross-sectional study including 76 women with tubo-ovarian abscesses (TOA) who were either conservatively or surgically treated and were admitted to two gynecology units over a 4-year period. The demographic characteristics of the patients, gynecologic and obstetric histories, size and localization of abscesses were recorded.

Reliability of posterior-left atrium space index measurements during 20-24 weeks of gestation in structurally normal fetuses.

Objective: We aimed to evaluate the correlation between clinical parameters and the post-left atrium (LA) space index, which is a candidate screening marker for total anomalous pulmonary venous connection (TAPVC). We also calculated the inter- and intra-observer variabilities of measurements for this parameter.

Methods: The LA-descending aorta distance/descending aorta diameter ratios (post-LA space index) were obtained from 165 fetuses between 20 and 24 weeks of gestation.

Pneumoconiosis and respiratory problems in dental laboratory technicians: analysis of 893 dental technicians.

Objectives: To explore the rate of pneumoconiosis in dental technicians (DTP) and to evaluate the risk factors.

Material And Methods: Data of 893 dental technicians, who were admitted to our hospital in the period January 2007-May 2012, from 170 dental laboratories were retrospectively examined. Demographic data, respiratory symptoms, smoking status, work duration, working fields, exposure to sandblasting, physical examination findings, chest radiographs, pulmonary function tests and high-resolution computed tomography results were evaluated.

Relationship between radiological (X-ray/HRCT), spirometric and clinical findings in dental technicians' pneumoconiosis.

Introduction: Pneumoconiosis in dental technicians' has rarely been evaluated.

Objectives: To evaluate clinical, functional and radiological impacts of exposure to dust on respiratory functions via chest X-ray (CXR), high-resolution computed tomography (HRCT) and spirometry in dental technicians.

Methods: Demographic data, respiratory symptoms, spirometry results, CXR and HRCT scans of 32 dental technicians were evaluated.

Shielding property of natural biomass against gamma rays.

Algae and cyanobacteria are capable living under harsh conditions in the natural environments and can develop peculiar survival processes. In order to evaluate radiation shielding properties of green algae; Chlorella vulgaris, Scenedesmus obliquus, and cyanobacteria; Synechococcus sp., Planktothrix limnetica, Microcystis aeruginosa, Arthrospira maxima, Anabaena affinis, Phormidium articulatum, and Pseudoanabaena sp.