Karaelmas Science and Engineering Journal最新文献

Determining Gaze Information from Steady-State Visually-Evoked Potentials 从稳态视觉诱发电位中确定凝视信息

Karaelmas Science and Engineering Journal Pub Date : 2020-12-20 DOI: 10.7212/zkufbd.v10i2.1588

Ebru Sayilgan, Y. Yuce, Y. Isler

{"title":"Determining Gaze Information from Steady-State Visually-Evoked Potentials","authors":"Ebru Sayilgan, Y. Yuce, Y. Isler","doi":"10.7212/zkufbd.v10i2.1588","DOIUrl":"https://doi.org/10.7212/zkufbd.v10i2.1588","url":null,"abstract":"Brain-Computer Interface (BCI) is a communication system that enables individuals who lack control and use of their existing muscular and nervous systems to interact with the outside world because of various reasons. A BCI enables its user to communicate with some electronic devices by processing signals generated during brain activities. This study attempts to detect and collect gaze data within Electroencephalogram (EEG) signals through classification. To this purpose, three datasets comprised of EEG signals recorded by researchers from the Autonomous University were adopted. The EEG signals in these datasets were collected in a setting where subjects’ gaze into five boxes shown on a computer screen was recognized through Steady-State Visually Evoked Potential based BCI. The classification was performed using algorithms of Naive Bayes, Extreme Learning Machine, and Support Vector Machines. Three feature sets; Autoregressive, Hjorth, and Power Spectral Density, were extracted from EEG signals. As a result, using Autoregressive features, classifiers performed between 45.67% and 78.34%, whereas for Hjorth their classification performance was within 43.34-75.25%, and finally, by using Power Spectral Density their classification performance was between 57.36% and 83.42% Furthermore, classifier performances using Naive Bayes varied between 52.23% and 79.15% for Naive Bayes, 56.32-83.42% for Extreme Learning Machine, and 43.34-72.27% for Support Vector Machines by regarding classification algorithms. Among achieved accuracy performances, the best accuracy is 83.42%, achieved by the Power Spectral Density features and Extreme Learning Machine algorithm pair.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83048040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Finite Elements Modeling and Analysis of an Axially Loaded Prestressing Strand 轴向预应力钢绞线的有限元建模与分析

Karaelmas Science and Engineering Journal Pub Date : 2020-12-15 DOI: 10.7212/zkufbd.v10i2.1615

Y. A. Onur, Abdullah Tombak

引用次数: 0

Meme Kanseri Tespitinde Evrişimsel Sinir Ağı Modellerinin Performansları

Karaelmas Science and Engineering Journal Pub Date : 2020-12-15 DOI: 10.7212/zkufbd.v10i2.1613

Ali Narin, Safa Kaan Kefeli

{"title":"Meme Kanseri Tespitinde Evrişimsel Sinir Ağı Modellerinin Performansları","authors":"Ali Narin, Safa Kaan Kefeli","doi":"10.7212/zkufbd.v10i2.1613","DOIUrl":"https://doi.org/10.7212/zkufbd.v10i2.1613","url":null,"abstract":"Meme kanseri, tum dunyada oldukca yaygin olan bir kanser turudur. Cogunlukla kadinlarda gorulen bu kanser turunun erken tespiti oldukca onemlidir. Bu nedenle zorlu ve yorucu olan meme kanseri tespit surecinde bilgisayar destekli karar mekanizmalarinin gelistirilmesi onemlidir. Bu calismada, meme kanseri tespitinde kesin taninin konmasina yardimci olmak icin bilgisayar tabanli otomatik bir karar destek sistemi tasarlanmistir. Sistem icin, farkli buyutme miktarlarina sahip gercek ham histopatolojik goruntuler kullanilmistir. Bu goruntulerden hangisinin iyi huylu tumor hangisinin kotu huylu tumor olduguna on egitimli ResNet50 evrisimli sinir agi ve VGG16 evrisimli sinir agi kullanilarak karar verilmistir. Bununla beraber veri setindeki 4 farkli buyutme oranlarindan (40X,100X,200X,400X) hangi buyutme miktarinda daha iyi tespit yapildigi arastirilmistir. Sonuc olarak 200X buyutme miktarina sahip veriler icin %93,03 dogruluk, %93,03 hassaslik ve %93,03 secicilik performans degerleri on egitimli Resnet50 evrisimli sinir agi ile tespit edilmistir. Amaclanan bu sistemin patologlara yardimci bir bilgisayar tabanli tumor tespit uygulamasi olacagi dusunulmektedir.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84083477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Beauveria bassiana on Galleria mellonella L. (Lepidoptera:Pyralidae) and its parasitoid Trichogramma cacoeciae 球孢白僵菌对黄粉蚧及其寄生蜂赤眼蜂的防治作用

Karaelmas Science and Engineering Journal Pub Date : 2020-12-15 DOI: 10.7212/zkufbd.v10i2.1547

B. Tuncsoy, F. Bueno-Pallero, L. Dionísio, Luís Neto, Pınar Ozalp

{"title":"Effect of Beauveria bassiana on Galleria mellonella L. (Lepidoptera:Pyralidae) and its parasitoid Trichogramma cacoeciae","authors":"B. Tuncsoy, F. Bueno-Pallero, L. Dionísio, Luís Neto, Pınar Ozalp","doi":"10.7212/zkufbd.v10i2.1547","DOIUrl":"https://doi.org/10.7212/zkufbd.v10i2.1547","url":null,"abstract":"Beauveria bassiana, which is a species of entomopathogenic fungus, used for this experiment in order to determine the effects on Galleria mellonella and its parasitoid Trichogramma cacoeciae. 105, 106, 107 and 108 conidia/mL were applied to the last instar of G. mellonella by injecting the suspensions. To determine the effect of B. bassiana on T. cacoeciae, 108 conidia/mL were applied to the G. mellonella eggs. No mortality was observed in 105 and 106 conidia/mL of B. bassiana injected group, whereas death larvae was determined in 107 and 108 conidia/mL injected groups. Prevalence of black spots within the integument increased day by day. Hatchability of G. mellonella eggs were significantly decreased when B. bassiana applied to the G. mellonella eggs. Parasitism and emergence ratio were unaffected by B. bassiana. \u0000The biosafety of B. bassiana against T. cacoeciae was determined by monitoring the parasitization and emergence ratio. It was detected B. bassiana was safe to this egg parasitoid. However, there is a significant effect on mortality of G. mellonella larvae and hatchability of G. mellonella eggs.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83993223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Theoretical Investigation on Electronic Behavior and Mechanical Properties of Ferromagnet Silver-Based Telluride: Ag3FeTe4 银基碲化物Ag3FeTe4的电子行为和力学性能的理论研究

Karaelmas Science and Engineering Journal Pub Date : 2020-12-15 DOI: 10.7212/zkufbd.v10i2.1620

A. Erkişi, B. Yildiz

{"title":"The Theoretical Investigation on Electronic Behavior and Mechanical Properties of Ferromagnet Silver-Based Telluride: Ag3FeTe4","authors":"A. Erkişi, B. Yildiz","doi":"10.7212/zkufbd.v10i2.1620","DOIUrl":"https://doi.org/10.7212/zkufbd.v10i2.1620","url":null,"abstract":"The magnetic nature, mechanical properties and electronic behavior of the ternary silver-based telluride system (Ag3FeTe4) which has sulvanite type simple cubic (SC) crystal structure which has 215 space number and conforms P4 3m space group, have been inspected by spin-polarized Generalized Gradient Approach (GGA) under Density Functional Theory (DFT). First of all, to investigate suitable magnetic order for this system, it has been considered various antiferromagnetic phases which are A-type (A-AFM), G-type (G-AFM) and C-type (C-AFM) and ferromagnetic (FM) phase. As a result of calculations, it has been understood that, for Ag3FeTe4 compound, the energetically most favored magnetic phase is ferromagnetic. After that, well-optimized structural parameters and atomic positions has been obtained in ferromagnetic phase. The electronic band structure of this ferromagnetic system indicating half-metalic behavior due to the observed a small direct band gap (Eg = 0.297 eV) in spin-down states, has been investigated. Also, this compound has thermodynamic stability and structural synthesizability due to its calculated negative formation enthalpy values for all different type magnetic phases. Also, the elastic constants provide the Born Huang criteria, the material is mechanically stable.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88470696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of alkali content and activator modulus on mechanical properties of alkali activated mortars 碱含量和活化剂模量对碱活化砂浆力学性能的影响

Karaelmas Science and Engineering Journal Pub Date : 2020-12-15 DOI: 10.7212/zkufbd.v10i2.1611

A. Pehlivan

{"title":"Effect of alkali content and activator modulus on mechanical properties of alkali activated mortars","authors":"A. Pehlivan","doi":"10.7212/zkufbd.v10i2.1611","DOIUrl":"https://doi.org/10.7212/zkufbd.v10i2.1611","url":null,"abstract":"Alkali activation is a promising method of reducing cement production considerably without further significant investments. Utilization of these materials are of extreme importance when environmental aspects such as CO2 emissions and energy consumptions are considered. In this article, effect of activator modulus and alkali content on fresh behavior and mechanical properties were investigated. 12 M NaOH solution and sodium silicate solution with a modulus of 3 were used. Water-to-binder ratio was selected as 0.5 for all specimens where binder content was calculated as the total of slag content plus activator solids. Slag content was 500 kg/m3 for all mixtures. Mechanical tests were conducted on 40 x 40 x 160 mm prismatic specimens. Results indicate that mechanical properties of alkali activated mixtures are highly dependent on both parameters hence proper optimization of these two parameters becomes compulsory. In this study, it is concluded that alkali content (Na2O/slag) should be selected 9% and whereas activator modulus should be leveled near a value of 1.5. Flexural properties were also highly affected from optimization of these parameters and similar findings are deduced. Early strength evaluations are highly dependent on activator modulus. Workability of the mixture were also diagnosed and it should be noted that flowability of mixture were adversely affected with the increasing activator solids content.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80272885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Mikroemülsiyon Tekniği ile Üretilmiş Hidroksiapatit Nanoparçacıkların Ti6Al4V Altlıklar Üzerine Elektroforetik Biriktirme Yöntemi ile Kaplanması ve Vakum Ortamında Sinterlenmeleri

Karaelmas Science and Engineering Journal Pub Date : 2020-12-15 DOI: 10.7212/zkufbd.v10i2.1600

M. Telli, Arzu Altınpınar

{"title":"Mikroemülsiyon Tekniği ile Üretilmiş Hidroksiapatit Nanoparçacıkların Ti6Al4V Altlıklar Üzerine Elektroforetik Biriktirme Yöntemi ile Kaplanması ve Vakum Ortamında Sinterlenmeleri","authors":"M. Telli, Arzu Altınpınar","doi":"10.7212/zkufbd.v10i2.1600","DOIUrl":"https://doi.org/10.7212/zkufbd.v10i2.1600","url":null,"abstract":"Bu calismada mikroemulsiyon teknigi kullanilarak uretilmis biyouyumlu hidroksiapatit nano parcaciklarin Elektroforetik biriktirme (EPD) yontemiyle Ti6Al4V altliklar uzerine kaplanmalari ve vakum ortaminda sinterlenmeleri incelenmistir. Mikroemulsiyon teknigiyle hidroksiapatit nanoparcacik uretiminde yuzey aktif madde olarak Sodyum Dodesil Sulfat (SDS), su emulsiyon ortami olarak kalsiyum hidroksit solusyonu, ikinci sivi organik matriks ortami olarak benzen ve fosfor kaynagi olarak seyreltilmis ortofosforik asit kullanilmistir. Nano boyutta HAp parcaciklari, hizli bir karistirma islemi ile olusan su mikroemulsiyonu icinde cokeltme reaksiyonu sonucunda uretilmistir. Sentezlenen hidroksiapatit nanoparcaciklarin boyutunun Taramali Elektron Mikroskobu (SEM) incelemeleri 20-200 nm araligina oldugu belirlenmistir. Nano hidroksiapatit parcaciklari sentezlendikleri su ortaminda dogru akim (DC) guc kaynagi kullanilarak 5, 10, 15, 20 ve 30 dakikalik surelerde elektforetik biriktirme yontemiyle kaplanmis, hava ortaminda yavas kurutulmus ve 1000 °C’de 10-4 mbar vakum altinda 20 dakika sinterlenmistir. Sentezlenen nano hidroksiapatit parcaciklar ve kaplamalarin kiristal yapi olusumlari X - Isinlari difraksiyonu (XRD) kullanarak incelenmistir. Kaplamalarin sinterleme oncesi ve sonrasi mikroyapilari isik mikroskobuyla incelenip belirtilmistir.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86293722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of Normal Values for Flash Electroretinogram (FERG) Test 闪光视网膜电图(FERG)试验正常值的测定

Karaelmas Science and Engineering Journal Pub Date : 2020-12-15 DOI: 10.7212/zkufbd.v10i2.1550

Rukiye Uzun

{"title":"Determination of Normal Values for Flash Electroretinogram (FERG) Test","authors":"Rukiye Uzun","doi":"10.7212/zkufbd.v10i2.1550","DOIUrl":"https://doi.org/10.7212/zkufbd.v10i2.1550","url":null,"abstract":"Electroretinography is the recording of the electrical potentials when the retinal cells are stimulated with flash light. In this way, the retinal visual pathways from photoreceptors to amacrine cells can be evaluated as a whole. In this manner, it is possible to evaluate the retinal visual pathways as a whole. In obtaining electroretinography signals; factors such as the device used, the electrode, the methods in the tests performed, and the laboratory conditions play an important role. The obtained signals vary depending on these factors. Therefore, it has become necessary to determine the normal values of each electrophysiological laboratory. In this respect, we aimed to determine normal values for flash electroretinography test. Flash electroretinography test was applied to individuals who did not have any ocular disease by using the device in Zonguldak Bulent Ecevit University Obesity and Diabetes Application and Research Center. All stages of the test were carried out in accordance with the recommendations of the International Society for Clinical Electrophysiology of Vision. Using the test results, the normal values were calculated in median and were presented with the upper and lower limits of 95% confidence interval. It is thought that the normal values determined may serve as a reference for newly established laboratory environments.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84592460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rüzgar Enerjisi Santral (RES) Yapım Yerlerinin CBS Dayalı Çok Kriterli Karar Analizi ile Belirlenmesi: Yenice İlçesi (KARABÜK) Örneği

Karaelmas Science and Engineering Journal Pub Date : 2020-12-15 DOI: 10.7212/zkufbd.v10i2.1602

Deniz Arca, Hülya Keskin Çıtıroğlu

引用次数: 0

Effects of different cadmium and lead rates on the egg production and hatchability of adult Pimpla turionellae L. (Hym.,Ichneumonidae). 不同镉、铅浓度对蛋鸡斑虱成虫产蛋率和孵化率的影响

Karaelmas Science and Engineering Journal Pub Date : 2020-12-15 DOI: 10.7212/zkufbd.v10i2.1566

M. Sulanc

引用次数: 0