15 research outputs found

    Performance Comparison of Turkish Web Pages Classification

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    Nowadays., web page classification is essential for efficient and fast search engines. There is an ever-increasing need for automatic classification techniques with higher classification accuracy. In this article., a performance comparison of existing Turkish language CNN models for web pages classification systems is performed. In more detail., the content of web pages is extracted first., then preprocessing steps that aim to detect the important parts and eliminate useless contents are used. Next., Bert word embedding is integrated to represent the texts by efficient numerical vectors. Finally., three state-of-the-art CNN models that fully support the Turkish language are investigated to find the best classifier. Overall., the three studied models obtained an acceptable performance while classifying the Turkish webpages., however., the third model was able to achieve slightly better than the other two models. © 2021 IEEE

    Streamflow forecasting using a hybrid LSTM-PSO approach: the case of Seyhan Basin

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    The conditions which affect the sustainability of water cause a number of serious environmental and hydrological problems. Effective and correct management of water resources constitutes an effective and important issue among scales. In this sense, a precise estimation of streamflow time series in rivers is one of the most important issues in optimal management of surface water resources. Therefore, a hybrid method combining particle swarm algorithm (PSO) and long short-term memory networks (LSTM) are proposed to predict flow with data obtained from different flow measurement stations. In this respect, the data gathered from three Flow Measurement Stations (FMS) from Zamanti and Eglence rivers located on Seyhan Basin are utilized. Besides, the proposed LSTM-PSO method is compared to an adaptive neuro-fuzzy inference system (ANFIS) and the LSTM benchmark model to demonstrate the performance achievement of proposed method. The prediction performances of the developed hybrid model and the others are tested on the determined stations. The forecasting performances of the models are determined with RMSE, MAE, MAPE, SD, and R-2 metrics. The comparison results indicated that the LSTM-PSO method provides highest results with values of R-2 (approximate to 0.9433), R-2 (approximate

    Tracheobronchial Angle Measurements in Children: An Anthropometric Retrospective Study With Multislice Computed Tomography

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    Objectives The purpose of this study is to investigate if any change exists in the values of tracheal bifurcation angles (subcarinal angle [SCA] and interbronchial angle [IBA]), right and left bronchial angles (RBA and LBA) in different pediatric age groups. Methods Chest computed tomography (CT) images of children aged 18 years and younger were reviewed retrospectively by two radiologists who were blinded to each other’s measurements. One hundred and eighteen children were involved. RBA, LBA, SCA, and IBA were measured on coronal reformatted images. Subjects were classified into three groups according to their age. Measurement of IBA was done by measuring the angle between the lines drawn along the central axis of right and left main bronchi over their length. RBA and LBA were measured at the intersection points of the lines drawn along the inferior borders of the right and left main bronchi and the line passing through the longitudinal axis of trachea. Sums of RBA and LBA gave SCA. Interobserver agreement was also analyzed. Results SCA, IBA, and RBA values were statistically significant between children of ages less than 10 years and over 10 years P<0.01). Interobserver agreement was excellent with an intraclass correlation coefficient score of 0.87 (95% confidence interval) for RBA, SCA, and IBA measurements. Conclusion We concluded that tracheal bifurcation angles are wider in children of age 10 years and younger. As age increases values of SCA, IBA, and RBA decrease

    Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

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    Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

    Comparison of conventional coagulation and electrocoagulation methods for dewatering of coal preparation plant

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    This study compares the results of the dewatering of coal preparation plants tailings by conventional coagulation processes using different types of coagulants and by electrocoagulation methods carried out by two different electrodes. When the results of electrocoagulation and conventional coagulation experiments were compared (aluminium electrode vs. ferric chloride), it was found that the coagulation efficiencies for both methods were similar, in the case that the aluminium electrode was used, there was a 22.2% decrease in the process cost compared to the use of ferric chloride

    Export Competitiveness of Turkiye Agri-food Products in the European Union and The Shanghai Cooperation Markets

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    The purpose of this study was to investigate the competitive advantage and long-term viability of Turkiye agri-food exports to the European Union (EU) and Shanghai Cooperation Organization (SCO) markets. The Lafay index and trade ratios were utilized to investigate comparative and competitive advantage, while the survival function was employed to estimate export competition for the EU and SCO markets. The results indicate that Turkiye has a competitive edge in the export of fruits and vegetables to the EU and SCO states. However, the period of comparative advantage experienced by EU and SCO countries was not similar, nor was the benefit consistent. Despite fluctuations in Turkiye's international trade balance with SCO members, its foreign trade with EU members has increased. Hence, Turkiye should continue to trade in agri-food with the EU while simultaneously expanding business networks with SCO countries.Peer reviewe

    Streamflow forecasting using a hybrid LSTM-PSO approach: the case of Seyhan Basin

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    © 2023, The Author(s), under exclusive licence to Springer Nature B.V.The conditions which affect the sustainability of water cause a number of serious environmental and hydrological problems. Effective and correct management of water resources constitutes an effective and important issue among scales. In this sense, a precise estimation of streamflow time series in rivers is one of the most important issues in optimal management of surface water resources. Therefore, a hybrid method combining particle swarm algorithm (PSO) and long short-term memory networks (LSTM) are proposed to predict flow with data obtained from different flow measurement stations. In this respect, the data gathered from three Flow Measurement Stations (FMS) from Zamanti and Eğlence rivers located on Seyhan Basin are utilized. Besides, the proposed LSTM-PSO method is compared to an adaptive neuro-fuzzy inference system (ANFIS) and the LSTM benchmark model to demonstrate the performance achievement of proposed method. The prediction performances of the developed hybrid model and the others are tested on the determined stations. The forecasting performances of the models are determined with RMSE, MAE, MAPE, SD, and R2 metrics. The comparison results indicated that the LSTM-PSO method provides highest results with values of R2 (≈ 0.9433), R2 (≈ 0.6972), and R2 (≈ 0.9273) for the Değirmenocağı, Eğribük, and Ergenusagi FMS data, respectively

    Dielectric Response and Capacitance Measurements of Ag/ PVAc-Si /p-Si Structure

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    In this study, the effect of Poly(vinyl acetate) latex with Silicone surfactant (shortly PVAc-Si) thin film on the dielectric and capacitance-voltage properties of Ag / PVAc-Si /p-Si (MIS) structure were investigated. The dielectric characterization was obtained by impedance spectroscopy technique between 40 Hz-110 MHz at room temperature. The capacitance-voltage measurements were performed to clarify the flat band voltage of the sample. The frequency dependence of the real and imaginary parts of the complex impedance function indicated a space charge polarization. The Nyquist plots confirmed a single Debye type relaxation. The real and imaginary components of the complex dielectric function implied the effect of the grain and grain boundary effects in the material. Alternative current (ac) conductivity versus frequency curve of the structures displayed two different conductivity regimes. Nearly dc conductivity for the low frequencies and the dispersive region of the high-frequency band was obtained. The increase in ac conductivity with increasing frequency has been explained in the context of the Quantum Mechanical Tunneling (QMT) mechanism for PVAc-Si film-induced devices. According to the capacitance-voltage measurement, it is also shown that there is a hysteresis for flat band capacitance in between the applied forward and reverse voltage. Reduction of this hysteresis is achieved by the applied voltage across terminals of the PVAc-Si film-induced MIS structure. This controllable reduction in hysteresis may find a place in an application for floating gate memory devices. This study also provides to understand the effect of insulator layer thickness on the dielectric behavior of MIS devices

    Sarcoidosis Presenting with Membranous Nephropathy in a Patient with Hypertensive Nephropathy: Case Report

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    WOS: 000374928400015Sarcoidosis is a systemic granulomatous disease that primarily involves the lung but may also have renal involvement. We present a hypertensive nephrosclerosis case found to have sarcoidosis after membranous nephropathy was diagnosed. A 57-year-old female patient was admitted due to nephrotic syndrome. She had a history of hypertension for 5 years. Fundus examination was consistent with grade 2 hypertensive retinopathy. Kidney biopsy was performed because of nephrotic syndrome and impaired renal function and revealed membranous nephropathy. Sarcoidosis was diagnosed while secondary causes of membranous nephropathy were investigated. Nephrotic syndrome was improved with steroid treatment in 6 months. In conclusion, a sarcoidosis case initially presenting with membranous nephropathy is an uncommon manifestation. Secondary causes of membranous nephropathy must be carefully investigated
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