A deep learning approach to dental restoration classification from bitewing and periapical radiographs

Özcan KARATAŞ | Nazire Nurdan ÇAKIR | Şaban Suat ÖZSARIYILDIZ | Cem Abdülkadir GÜRGAN

Objective: The aim of this study was to examine the success of deep learning-based convolutional neural networks (CNN) in the detection and differentiation of amalgam, composite resin, and metal-ceramic restorations from bitewing and periapical radiographs. Method and materials: Five hundred and fifty bitewing and periapical radiographs were used. Eighty percent of the images were used for training, and 20% were left for testing. Twenty percent of the images allocated for training were then used for validation during learning. The image classification model was based on the application of CNN. ...Daha fazlası

Makale/Derleme 2021 Quintessence International 12 Görüntülenme

The effect of sonic activation of irrigant on postoperative pain after root canal treatment in primary molar teeth: a randomized, clinical study

Ebru DELİKAN |

Purpose Postoperative pain following root canal treatment is a concern for pediatric patients and pediatric dentists. The purpose of this study was to evaluate the effect of using sonic activation (SA) on postoperative pain levels after root canal therapy of primary molars. Methods A total of 110 patients aged 5–9 years with symptomatic irreversible pulpitis involving primary molars were included in the study and were randomly divided into two groups according to agitation methods: SA and no sonic activation (NSA). Root canal treatments were completed, and the teeth were restored permanently. ...Daha fazlası

Makale/Derleme 2021 Clinical Oral Investigations 7 Görüntülenme

Capacity and amount of fading analysis for SIMO communications over eta-mu and lambda-mu fading channels

Mehmet BİLİM

This study evaluates the performance of single-input multiple-output (SIMO) wireless networks or dual- branch (DB) SIMO scenarios over the η–μ and the λ–μ fading links. First, the probability density functions (PDFs) of the instantaneous signal to noise ratio for a DB SIMO system in the η–μ and the λ–μ fading conditions. Then, the closed-form expressions of the effective rate (ER or effective capacity) for a SIMO network are derived. In addition to this, asymptotic ER expressions for the considered SIMO network are proposed. The analytical capacity expressions with different transmission polic ...Daha fazlası

Makale/Derleme 2021 DIGITAL SIGNAL PROCESSING 5 Görüntülenme

The different aspects of english language teaching and learning: a scientometric analysis

Beril TEZELLER ARIK | Engin ARIK

We analyzed publications in English as a Foreign Language (EFL), English as a Second Language (ESL), Teaching English as a Foreign Language (TEFL), Teaching English as a Second Language (TESL), and Teachers of English to Speakers of Other Languages (TESOL) between 1900 and 2016 as indexed by Web of Science. We found that there were 1,839, 2,143, 44, 46, and 414 publications, respectively. Moreover, language and English were the common words in almost all the EFL, ESL, and TESOL abstracts. EFL and ESL shared study and students, while learning and learners appeared in almost all the EFL abstract ...Daha fazlası

Makale/Derleme 2021 WORLD ENGLISHES 5 Görüntülenme

Erişime Açık

A new PAPR and BER enhancement technique based on lifting wavelet transform and selected mapping method for the next generation waveforms

Asuman SAVAŞÇIHABEŞ | Ali ÖZEN

Orthogonal frequency division multiplexing (OFDM) is widely used in many digital communication systems because of its immunity to inter-symbol interference, high spectral efficiency and capability of handling multipath. Walsh-Hadamard transform (WHT) and discrete wavelet transform (DWT) have also been suggested in order to enhance the performances of multi-carrier wireless communication systems. In general, high peak-to-average power ratio (PAPR) is one of the biggest disadvantages of these systems and OFDM also has this disadvantage. Many techniques such as amplitude clipping and filtering, e ...Daha fazlası

Makale/Derleme 2021 AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS 7 Görüntülenme

Capacity and amount of fading analysis for SIMO communications over η–μ and λ–μ fading channels

Mehmet BİLİM

This study evaluates the performance of single-input multiple-output (SIMO) wireless networks or dual- branch (DB) SIMO scenarios over the η–μ and the λ–μ fading links. First, the probability density functions (PDFs) of the instantaneous signal to noise ratio for a DB SIMO system in the η–μ and the λ–μ fading conditions. Then, the closed-form expressions of the effective rate (ER or effective capacity) for a SIMO network are derived. In addition to this, asymptotic ER expressions for the considered SIMO network are proposed. The analytical capacity expressions with different transmission polic ...Daha fazlası

Makale/Derleme 2021 Digital Signal Processing 6 Görüntülenme

Erişime Açık

A new fwht-cmf-dfe based approach for channel equalization in cp-free ofdm systems

Asuman SAVAŞÇIHABEŞ | Ali ÖZEN

Orthogonal frequency division multiplexing (OFDM) has been widely used in wireless communication systems due to its robustness against the frequency selectivity of fading channels. It provides optimal performance and it also meets the requirements of the next generation communication systems. Although OFDM has these advantages, its spectrum efficiency is usually degraded significantly due to the use of cyclic prefix (CP). In this paper, motivated to deal with this issue, the combined structure of Fast Walsh-Hadamard Transform (FWHT) and Time Domain Equalizer (TDE) is proposed to use in CP-free ...Daha fazlası

Makale/Derleme 2021 Iet Communications 6 Görüntülenme

Erişime Açık

A novel gfdm waveform design based on cascaded wht-lwt transform for the beyond 5g wireless communications

Asuman SAVAŞÇIHABEŞ | Ali ÖZEN

In this paper, a new WHT-LWT-GFDM waveform obtained by combining Walsh–Hadamard Transform (WHT), Lifting Wavelet Transform (LWT), and Generalized Frequency Division Multiplexing (GFDM) is presented for use in next-generation wireless communication systems. The proposed approach meets the requirement of 5th-generation (5G) and beyond communication schemes in terms of low latency, low peak-to-average-power ratio (PAPR), and low bit-error rate (BER). To verify the performance of the presented waveform, PAPR and BER simulation results were obtained in additive white Gaussian noise (AWGN) and flat ...Daha fazlası

Makale/Derleme 2021 Sensors 11 Görüntülenme

Erişime Açık

Lifting wavelet transform based multicarrier modulation scheme for coherent optical communication systems

Ali ÖZEN

In this paper, it was proposed a new multicarrier modulation scheme, based on lifting wavelet transform for coherent optical communication systems. This new wave scheme used the energy compaction property of lifting wavelet transform that provides low leakage in subcarriers. The new wave scheme based system was allowed improved performance in terms of bit error rate and reduction in the peak to average power ratio compared to conventional cyclic prefix based OFDM. It was found that the use of the new wave scheme was possible to extend the transmission distance by 100 km and 150 km compared to ...Daha fazlası

Makale/Derleme 2021 Journal of Lightwave Technology39 ( 13 ) , pp. 4 - 4261 4 Görüntülenme

Erişime Açık

Public transportation vehicle selection by the grey relational analysis method

Gülçin CANBULUT | Erkan KÖSE | Oğuzhan Ahmet ARIK

The success of businesses today is largely dependent on their ability to find solutions to complex problems they encounter. Vehicle selection, which requires considering many objective and subjective criteria, is at the top of these problems. The tramway selection problem of a company operating in the public transport sector in Turkey is discussed in this study. The company wants to increase passenger carrying capacity and renew its vehicle fleet. For this purpose, it has to choose from eight alternative vehicles with different superior features. Considering the high costs that may arise from ...Daha fazlası

Makale/Derleme 2021 Public Transportation 11 Görüntülenme

Determination Of Displacements On Built-Up Steel Beams During Experiments By İmage Processing

Şaban Suat ÖZSARIYILDIZ | Ertan SÜLEV

AbstractIn this study, an image processing technique is developed for measuring the displacements during flexural loading experiments of structural beams as an alternative to measurements by traditional gauging devices. In this context, four-point bending tests were carried out on three built-up (welded) steel beams, one of them without stiffening plates and the others with stiffening plates. In the experiments, while the load-deflection values in each loading step were taken using load cells and LVDTs, a video recording of the experiments was simultaneously taken. The load-deflection curves w ...Daha fazlası

Makale/Derleme 2021 Journal of Constructional Steel Research 10 Görüntülenme

A study on three different hydropower operation rules by monthly and daily time steps

Tefaruk HAKTANIR | Alper AYDEMİR

Operation simulation models are developed for monthly and daily time steps for computing the hydroelectric energy and its financial benefits in an economic life by three different operation policies: steady-rate, three-shift and pumped-storage rules. The pump is operated during the night and consumes low-cost energy. The resulting computer programs, three on monthly and three on daily steps, are applied to the Yamula dam – which is a fairly large dam generating energy, located in the Inland Anatolia region of Turkey – over a period of 35 years using the gauged daily stream flows and daily pan ...Daha fazlası

Makale/Derleme 2021 Proceedings of the Institution ofCivil Engineers - Energy 5 Görüntülenme

Detaylı Arama

Filtreler

Koleksiyon [19]

İlgili Araştırmacılar [20]

BM Sürdürülebilir Kalkınma [1]

Tam Metin [2]

Tür [5]

Yazar [19]

Alt Tür [1]

Alt Tür 1 [2]

Konu Başlıkları [20]

Açık Erişim Tarihi [5]

Tarih [1]

Dizin Platformu [3]

İsmi Geçen [10]

WOS Kategorileri [5]

Teşvik [1]

Özcan KARATAŞ | Nazire Nurdan ÇAKIR | Şaban Suat ÖZSARIYILDIZ | Cem Abdülkadir GÜRGAN

Ebru DELİKAN |

Mehmet BİLİM

Beril TEZELLER ARIK | Engin ARIK

Asuman SAVAŞÇIHABEŞ | Ali ÖZEN

Mehmet BİLİM

Asuman SAVAŞÇIHABEŞ | Ali ÖZEN

Asuman SAVAŞÇIHABEŞ | Ali ÖZEN

Ali ÖZEN

Gülçin CANBULUT | Erkan KÖSE | Oğuzhan Ahmet ARIK

Şaban Suat ÖZSARIYILDIZ | Ertan SÜLEV

Tefaruk HAKTANIR | Alper AYDEMİR