Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(77)
- Merdan, Mehmet(73)
- Duran, Celal(54)
- Ozdes, Duygu(50)
- Baltaci, Cemalettin(45)
- Kaygusuz, Abdullah(45)
- Kulakaç, Nurşen(39)
- Ashyralyyev, Charyyar(38)
- Karsli, Orhan(37)
- Demir, Selim(36)
- Öztürk, Serkan(36)
- Dokuz, Abdurrahman(35)
- Turan, Ibrahim(35)
- Araz, Onur(33)
- Kandemir, Raif(31)
- Sipahi, Ferkan(30)
- Topal, Fevzi(30)
- Kurt, Kemal(28)
- Peker, Iskender(28)
- Arslan, Mehmet(27)
- Baltacı, Cemalettin(27)
- Maden, Nafiz(27)
- Ozturk, Samet(27)
- Aydin, Aydanur(26)
- Vural, Alaaddin(26)
- Bayrakdaroglu, Serdar(25)
- Kurnaz, Muammer(25)
- Reis, Hatice Catal(25)
- Akar, Zeynep(24)
- Aydin, Faruk(24)
- Gücer, Mehmet Ali(24)
- Topal, Meryem(24)
- Yolcu, Halil(24)
- Yücel, Cem(24)
- Anaç, Halil(23)
- Kankal, Murat(23)
- Ürkek, Bayram(23)
- Aliyazicioglu, Yuksel(22)
- Günen, Mehmet Akif(22)
- Tuncer, Metin(22)
Yayınlar
- MakaleAçık Erişim2021Solving Bigeometric Volterra Integral Equations by Using Successive Approximations Method
Güngör, Nihan
In this study, the successive approximations method has been applied to investigate the solution for the linear bigeometric Volterra integral equations of the second kind in the sense of bigeometric calculus. The conditions to be taken into consideration for the bigeometric continuity and the uniqueness of the solution of linear bigeometric Volterra integral equations of the second kind are researched. Finally, some numerical examples are presented to illustrate successive approximations method.
AtıfScopus1OpenAlex1TR Dizin1
İncele - MakaleYalnız künye2021Scopus SJRQ3The solutions of multiplicative Hermite differential equation and multiplicative Hermite polynomials
Yalçın, Numan
In this work, we give the power series solutions around an ordinary point, in the case of variable coefficients, homogeneous multiplicative differential equations of 2nd order. Further, we introduce the multiplicative Hermite differential equations, multiplicative Hermite polynomials and basic properties of these polynomials.
AtıfScopus17WoS18OpenAlex23
İncele - Derleme MakaleAçık Erişim2021Scopus SJRQ1The Large Hadron-Electron Collider at the HL-LHC
Agostini, P.; Aksakal, H.; Alekhin, S.; Allport, P. P.; Andari, N.; Andre, K. D. J.; Angal-Kalinin, D.; Antusch, S.; Aperio Bella, L.; Apolinario, L.
The Large Hadron-Electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) to the energy and intensity frontier of particle physics. Exploiting energy-recovery technology, it collides a novel, intense electron beam with a proton or ion beam from the High-Luminosity Large Hadron Collider (HL-LHC). The accelerator and interaction region are designed for concurrent electron-proton and proton-proton operations. This report represents an update to the LHeC's conceptual design report (CDR), published in 2012. It comprises new results on the parton structure of the proton and heavier nuclei, QCD dynamics, and electroweak and top-quark physics. It is shown how the LHeC will open a new chapter of nuclear particle physics by extending the accessible kinematic range of lepton-nucleus scattering by several orders of magnitude. Due to its enhanced luminosity and large energy and the cleanliness of the final hadronic states, the LHeC has a strong Higgs physics programme and its own discovery potential for new physics. Building on the 2012 CDR, this report contains a detailed updated design for the energy-recovery electron linac (ERL), including a new lattice, magnet and superconducting radio-frequency technology, and further components. Challenges of energy recovery are described, and the lower-energy, high-current, three-turn ERL facility, PERLE at Orsay, is presented, which uses the LHeC characteristics serving as a development facility for the design and operation of the LHeC. An updated detector design is presented corresponding to the acceptance, resolution, and calibration goals that arise from the Higgs and parton-density-function physics programmes. This paper also presents novel results for the Future Circular Collider in electron-hadron (FCC-eh) mode, which utilises the same ERL technology to further extend the reach of DIS to even higher centre-of-mass energies.
AtıfScopus272WoS219OpenAlex253İncele - MakaleAçık Erişim2021Scopus SJRQ1LC-HRMS Profiling and Antidiabetic, Anticholinergic, and Antioxidant Activities of Aerial Parts of Kinkor (Ferulago stellata)
Kiziltas, Hatice; Bingol, Zeynebe; Gören, Ahmet Ceyhan; Kose, Leyla Polat; Durmaz, Lokman; Topal, Fevzi; Alwasel, Saleh H.; Gulcin, Ilhami
Kinkor (Ferulago stellata) is Turkish medicinal plant species and used in folk medicine against some diseases. As far as we know, the data are not available on the biological activities and chemical composition of this medicinal plant. In this study, the phytochemical composition; some metabolic enzyme inhibition; and antidiabetic, anticholinergic, and antioxidant activities of this plant were assessed. In order to evaluate the antioxidant activity of evaporated ethanolic extract (EEFS) and lyophilized water extract (WEFS) of kinkor (Ferulago stellata), some putative antioxidant methods such as DPPHGreek ano teleia scavenging activity, ABTS(center dot+) scavenging activity, ferric ions (Fe3+) reduction method, cupric ions (Cu2+) reducing capacity, and ferrous ions (Fe2+)-binding activities were separately performed. Furthermore, ascorbic acid, BHT, and alpha-tocopherol were used as the standard compounds. Additionally, the main phenolic compounds that are responsible for antioxidant abilities of ethanol and water extracts of kinkor (Ferulago stellata) were determined by liquid chromatography-high-resolution mass spectrometry (LC-HRMS). Ethanol and water extracts of kinkor (Ferulago stellata) demonstrated effective antioxidant abilities when compared to standards. Moreover, ethanol extract of kinkor (Ferulago stellata) demonstrated IC50 values of 1.772 mu g/mL against acetylcholinesterase (AChE), 33.56 +/- 2.96 mu g/mL against alpha-glycosidase, and 0.639 mu g/mL against alpha-amylase enzyme respectively.
AtıfScopus66WoS62OpenAlex64
İncele - MakaleAçık Erişim2021Scopus SJRQ1Antidiabetic, anticholinergic and antioxidant activities of aerial parts of shaggy bindweed (Convulvulus betonicifolia Miller subsp.) - profiling of phenolic compounds by LC-HRMS
Bingol, Zeynebe; Kiziltas, Hatice; Gören, Ahmet C.; Kose, Leyla Polat; Topal, Meryem; Durmaz, Lokman; Alwasel, Saleh H.; Gulcin, Ilhami
In order to evaluate the antioxidant activity of evaporated ethanolic extract (EESB) and lyophilized water extract (WESB) of Shaggy bindweed (Convulvulus betonicifolia Mill. Subs), some putative antioxidant methods such as DPPH. scavenging activity, ABTS(center dot)(-) scavenging effect, ferric ions (Fe3+) reduction method, cupric ions (Cu2+) reducing capacity, and ferrous ions (Fe2+) binding activities were separately performed. Also, ascorbic acid, alpha-tocopherol and BHT were used as the standard compounds. Additionally, some phenolic compounds that responsible for antioxidant abilities of EESB and WESB were screened by liquid chromatography-high resolution mass spectrometry (LC-HRMS). At the same concentration, EESB and WESB demonstrated effective antioxidant abilities when compared to standards. In addition, EESB demonstrated IC50 values of 1.946 mu g/mL against acetylcholinesterase (AChE), 0.815 mu g/mL against alpha-glycosidase and 0.675 mu g/mL against alpha-amylase enzymes.
AtıfScopus84WoS83OpenAlex88İncele - MakaleYalnız künye2021Scopus SJRQ3The effect of chewing gum on dry mouth, interdialytic weight gain, and intradialytic symptoms: A prospective, randomized controlled trial
Ozen, Nurten; Aydin Sayilan, Aylin; Mut, Dilek; Sayilan, Samet; Avcioglu, Zeynep; Kulakac, Nursen; Ecder, Tevfik; Akyolcu, Neriman
Introduction The major salivary glands can be stimulated by chewing gum to increase saliva flow and decrease xerostomia. The aim of this study was to investigate the effect of chewing gum on dry mouth, interdialytic weight gain, and intradialytic symptoms in hemodialysis (HD) patients. Methods This prospective randomized controlled single-blind study was conducted with patients who had been treated for at least 6 months with sessions 3 days a week for 4 hours at two HD units. Patients were randomly allocated to chewing gum group or the control group. In the chewing gum group, gum was chewed for 10 minutes six times a day, and when the patients felt mouth dryness or were thirsty. In the nonchewing gum group, gum was not chewed. The patients were followed-up for 3 months. A total of three saliva samples were taken before starting treatment at the first, 12th, and 36th HD session. Data were collected with the Visual Analogue Scale (VAS), Hemodialysis Patients Fluid Control Scale, Dialysis Symptom Index, and Hospital Anxiety and Depression Scale at baseline, week 4, week 8, and week 12. Findings The study was completed with a total of 44 patients consisting of 22 patients in the each group. The second and third month VAS values (xerostomia) of the patients in the chewing gum groups were statistically significantly lower than those in the control group (P= 0.014,P < 0.001, respectively). The third month salivary flow rate in the chewing gum group was higher than the values in the control group patients (P < 0.001). Discussion It is anticipated that this study will raise nurses' awareness of dry mouth and encourage future studies on interventions to increase the salivary flow rate to prevent or treat dry mouth.
AtıfScopus18WoS19OpenAlex27İncele - MakaleAçık Erişim2021Scopus SJRQ1Non-Invasive Monitoring of Ethanol and Methanol Levels in Grape-Derived Pisco Distillate by Vibrational Spectroscopy
Menevseoglu, Ahmed; Aykas, Didem P.; Hatta-Sakoda, Beatriz; Toledo-Herrera, Victor Hugo; Rodriguez-Saona, Luis E.
Handheld Raman and portable FT-IR spectroscopy devices were evaluated for fast and non-invasive determination of methanol and ethanol levels in Peruvian Pisco. Commercial Peruvian Pisco (n = 171) samples were kindly provided by the UNALM Alliance for Research in Alcohol and its Derivatives (Lima, Peru) and supplemented by purchases at grocery and online stores. Pisco spectra were collected on handheld Raman spectrometers equipped with either a 1064 nm or a 785 nm excitation laser and a portable infrared unit operating in transmission mode. The alcohol levels were determined by GC-MS. Calibration models used partial least-squares regression (PLSR) to develop prediction algorithms. GC-MS data revealed that 10% of Pisco samples had ethanol levels lower than 38%, indicating possible water dilution. Methanol levels ranged from 10 to 130 mg/100 mL, well below the maximum levels allowed for fruit brandies. Handheld Raman equipped with a 1064 nm excitation laser gave the best results for determining ethanol (SEP = 1.2%; RPre = 0.95) and methanol (SEP = 1.8 mg/100 mL; RPre = 0.93). Randomly selected Pisco samples were spiked with methanol (75 to 2800 mg/100 mL), and their Raman spectra were collected through their genuine commercial bottles. The prediction models gave an excellent performance (SEP = 98 mg/100 mL; RPre = 0.97), allowing for the non-destructive and non-contact determination of methanol and ethanol concentrations without opening the bottles.
AtıfScopus19WoS17OpenAlex21İncele - MakaleYalnız künye2021Scopus SJRQ2Non-targeted approach to detect green pea and peanut adulteration in pistachio by using portable FT-IR, and UV-Vis spectroscopy
Menevseoglu, Ahmed; Aykas, Didem Peren; Adal, Eda
Pistachio is one of the most expensive nuts with having high economic importance in Turkey. It has become more prone to adulteration because of its high commodity value. Peanut with color additives and green pea are generally used to adulterate ground pistachio. Vibrational spectroscopy is a potential technique to detect adulterations in pistachio. The objective of this study was to generate a non-targeted method for portable FT-IR and UV-Vis spectrometers to authenticate pistachio and detect green pea and peanut adulterations. Pistachio granules were adulterated with green pea and peanut at different concentrations (5 to 40% w/w). Spectra were collected by a portable FT-IR spectrometer and by a conventional UV-Vis spectrometer and analyzed by Soft Independent Modeling of Class Analogy (SIMCA) to generate classification algorithms to authenticate pistachio, and Partial Least Square Regression (PLSR) to predict the concentrations of adulterants. SIMCA showed very distinct clusters for pure samples. Moreover, adulterated pistachio samples were discriminated by SIMCA even in low levels of adulteration (5%). Portable FTIR showed excellent performance (r(val) > 0.93) of predicting the adulterant levels with a standard error of prediction (SEP) 0.66% and 0.80% for green pea and peanut, respectively. Similarly, UV-VIS predicted (r(val) > 0.93) the adulterant levels with SEP 0.58% and 0.14% for green pea and peanut, respectively. The results supported that portable FT-IR, and UV-Vis units present great potential for real-time surveillance of green pea and peanut adulteration in pistachio.
AtıfScopus13WoS12OpenAlex15İncele - MakaleAçık Erişim2021Scopus SJRQ2Role of the Health System in Combating Covid-19: Cross-Section Analysis and Artificial Neural Network Simulation for 124 Country Cases
Bayraktar, Yuksel; Özyilmaz, Ayfer; Toprak, Metin; Isik, Esme; Büyükakin, Figen; Olgun, Mehmet Firat
In the fight against Covid-19, developed countries and developing countries diverge in success. This drew attention to the discussion of how different health systems and different levels of health spending are effective in combating Covid-19. In this study, the role of the health system in the fight against Covid-19 is discussed. In this context, the number of hospital beds, the number of doctors, life expectancy at 60, universal health service and the share of health expenditures in GDP were used as health indicators. In the study, firstly 2020 data was estimated by using the Artificial Neural Networks simulation method and this year was used in the analysis. The model, with the data of 124 countries, was estimated using the cross-sectional OLS regression method. The estimation results show that the number of hospital beds, number of doctors and life expectancy at the age of 60 have statistically significant and positive effects on the ratio of Covid-19 recovered/cases. Universal health service and share of health expenditures in GDP are not significant statistically on the cases and recovered. Hospital bed capacity is the most effective variable on the recovered/case ratio.
AtıfScopus17WoS17OpenAlex20İncele - MakaleAçık Erişim2021Scopus SJRQ2Adipokine, gut and thyroid hormone responses to probiotic application in chukar partridges (Alectoris chukar) exposed to heat stress
Bayraktar, Bulent; Tekce, Emre; Kaya, Hacer; Gürbüz, Ahmet Burak; Dirican, Ebubekir; Korkmaz, Serol; Atalay, Banu; Ülker, Ufuk
The aim of this study was to investigate the effect of Lactobacillus reuteri E81 (LRE) probiotic supplementation on heat stress responses in chukar partridges (Alectoris chukar). The birds were divided into two groups, one of which was exposed to heat stress (HS). Within each group, four subgroups, each including 64 birds, were created for the three treatment doses (200, 400 or 600 mg/kg) of LRE and the control. The experiment was started with day-old birds, kept at a temperature of 25 degrees C or 37 degrees C. After a 7-day adjustment period, the LRE supplementation lasted for 35 days. The levels of different adipokines, including visfatin (VF), adiponectin (ADP), chemerin (CHEM), as well as the concentration of plasma citrulline (CIT) and the levels of thyroid hormones (T3 and T4) and thyroid-stimulating hormone (TSH) in the blood were measured at 21 and 42 days of age. A significant correlation (P < 0.01) was found between LRE supplementation and the decrease in serum VF, ADP, CIT, T3 and T4 levels in partridges exposed to HS. On the other hand, no significant relationship was found between LRE supplementation and the serum CHEM and TSH levels (P > 0.05). We concluded that the addition of 600 mg/kg LRE is beneficial in preventing intestinal damage and inflammation provoked by HS.
AtıfScopus13WoS14OpenAlex16İncele - MakaleAçık Erişim2020Analysis of The Dynamics of The Classical Epidemic Model with Beta Distributed Random Components
Merdan, Mehmet; Bekiryazıcı, Zafer; Kesemen, Tülay
In this study, the classical epidemic model of Kermack and McKendrick is analyzed with beta distributed random components. A random analysis is done for the deterministic epidemic model by transforming the parameters and initial values of the system to random variables with beta distribution. The approximations for the expectations of the model variables are compared with the deterministic results to comment on the randomness of the cases with random parameters and random initial values. Results for some numerical characteristics of these two cases are also given to investigate the accuracy of the approximations for the expected values.
AtıfOpenAlex1TR Dizin1İncele - MakaleYalnız künye2020Bilgi ve İletişim Teknolojileri Malları İhracatı ve Beşeri Sermaye Arasındaki İlişki: G-7 Ülkeleri İçin Panel Hata Düzeltme Modeli Analizi
Akyol, Mehmet
Bilgi çağının yaşandığı günümüzde teknolojik ilerlemelerin hız kazanması bilgi ve iletişim teknolojilerinin önemini arttırmaktadır. Birçok ülke bilgi ve iletişim teknolojileri sektöründe üretim gücü ve ihracat artışı sağlamak adına sektöre yönelik fiziksel ve beşeri sermaye yatırımlarını arttırmaktadır. Bu çalışmada bilgi ve iletişim teknolojileri ürünleri ihracatı ile yüksek öğretim mezunu istihdam arasındaki uzun ve kısa dönemli ilişkiler havuzlanmış ortalama grup tahmincisi, dinamik sabit etkiler tahmincisi ve ortalama grup tahmincisi aracılığı ile analiz edilmektedir. Çalışma G-7 ülkelerini (Kanada, Almanya, Fransa, İtalya, İngiltere, Japonya ve ABD) kapsamakta ve veri eksikliğinden dolayı Japonya analize dahil edilmemektedir. 2003-2018 yılları arası dönemin değerlendirildiği çalışmada Hausman testi ile havuzlanmış ortalama grup tahmincisinin sonuçlarının geçerli olduğuna kanaat getirilmiştir. Havuzlanmış ortalama grup tahmincisi sonuçlarına göre bilgi ve iletişim teknolojisi ürünleri ihracatı ve yüksek öğretim mezunu istihdamı arasında uzun dönemli ilişkinin varlığı doğrulanmıştır.
- Derleme MakaleYalnız künye2020Beslenme ve İşçi Verimliliği Arasındaki İlişki
Bor, Hakan
İş verimliliği için, işçilerin sağlıklı olmaları ve işe konsantrasyonları temel faktörler arasındadır. Bu nedenle, işçilerin sağlıklı olmaları adına sağlıklı bir yaşamı sağlayacak dengeli ve yeterli bir beslenme imkanına sahip olmaları gerekmektedir. Ancak gerek çeşitli sağlık problemlerinden gerekse iş yerlerinde sunulan yemek hizmetlerinin yetersizliğinden ötürü işçiler dengeli ve yeterli beslenme imkanına sahip olamamaktadır. Bu durum da iş yerlerinde işçilerin yetersiz beslenmeden kaynaklı sağlık problemleri yaşamalarına sebep olmaktadır. Sağlık sorunları nedeniyle iş yerinden alınan sağlık izinlerinin artmasıyla da iş gücü kaybından ötürü iş yerindeki verimliliğin azalmasına neden olmaktadır. Diğer yandan yetersiz beslenen işçilerde hipoglisemi nedeniyle oluşan konsantrasyon kaybı da iş kazalarını artırmaktadır. Bu durum, iş yerindeki işlerin aksamasına, iş verimliliğinin düşmesine ve yaralanan veya sakatlanan işçi için yapılacak sağlık harcamaları nedeniyle iş yerinin zarar etmesine neden olmaktadır. Bütün bunlar nedeniyle bu çalışmada, incelenen ve uygun bir şekilde derlenen literatür çalışmalarının yardımıyla işçilerin yaptıkları işlerin ağırlığına uygun olarak besinlerden almaları gereken günlük kalori ihtiyacının ne olduğu ve işçi beslenmesi, işyeri sağlığı, iş kazaları ve işçi verimliliği arasındaki ilişkinin ortaya konulması amaçlanmıştır. Bu çalışma sonucunda, işçi beslenmesinin iş verimliliği ve iş kazalarıyla kuvvetli bir şekilde ilişkili olduğu görülmüştür.
AtıfTR Dizin3İncele - MakaleYalnız künye2020Investigation of the changes in bran mineral content according to the years and growth conditions in bread wheat genotypes
Bahar, Bilge
Bran is not only the raw material of animal feed or functional products; it has also become a natural additive used inthe other industrial fields. For this reason, in this study, it has been aimed to reveal to what extent the minerals (K, P, S,Mg, Ca, Zn, Fe, Mn, Cu, and Na) are affected by genotypes, growth seasons (years) and growth conditions and theirinteractions, rather than how much and what kind of minerals the wheat bran contains. For this purpose, in the study,in the growth seasons of 2013-2014 and 2014-2015, five bread wheat genotypes were carried out as three replicatedunder organic and conventional growth conditions according to the trial design of split plots in random blocks. At theend of the study, all minerals except Cu were affected by at least one of the variation sources; in other words, althoughit varies according to minerals, wheat bran minerals were significantly affected by wheat genotypes, growth yearsand growth conditions and their interactions. In addition, with this study, significant correlations were found betweensome minerals in organic and conventional conditions.
- MakaleAçık Erişim2020Comparison of the Models for Solar Photovoltaic System Performance Calculations for Ankara (Middle Anatolia)
Ozden, Talat; Karaveli, Abdullah Bugrahan; Akinoglu, Bulent G
In a techno-economic analysis, to reach truthful feasibilities, accurate performance calculation of PV systems is a must. There are manymodels/calculation schemes to estimate PV module performances. In this study, we compare the estimation of three software (PV*Sol,PVsyst, HelioScope) using a whole year field data obtained in Ankara, for five-module types. The reason for these choices of thesoftware is their common utilization by designers, financing bodies and investors. The results of the preliminary analysis showed thatthe calculation methods for the PV systems performances should be carefully evaluated and used as they contain quite many locateddependent empirical parameters, and distinctions in the fabricated modules. Therefore, the present article focuses on the systems thatuse the module types of Mono-Si, Poly-Si, µc-Si/a-Si, CIS, and HIT. The comparisons showed that the estimation accuracies of thesoftware are reasonable, yet the software Helioscope performs better than the others for the weather conditions of Ankara, MiddleAnatolia.
AtıfOpenAlex7TR Dizin5İncele - MakaleAçık Erişim2020Comparison of two plain radiographic and 3D-based measurement methods for posterior malleolar fragment size in trimalleol ankle fractures
Altun, Güray; Çatal Reis, Hatice; Bayram, Bülent; Saka, Gursel
Aim: The aim of this study is, to compare the posterior malleolar fragment (PMF) sizing between lateral ankleradiography measurement and computer assistted 3D modelling (CA3DM) methodsMethods: Fifty-one patients between january 2015 and november 2018 with posterior malleolar fractured wereincluded in this study. The rate of PMF to the articular surface at the distal end of the tibia was calculated by twodifferent imaging methods by two surgeons. According to posterior fragment size, patients were separated intotwo groups. Group 1 was consisted of posterior fragment size smaller than 15% and group 2 was bigger than15% due to CA3DM.Results: The interobserver correlation (IOC) between two observers and CA3DM was 44.3%. Also the IOCbetween first observer and CA3DM was 35.7% (p<0.05), second observer and CA3DM were 46.6% (p<0.01)and observers was 51.6% (p<0.01). For group 1, IOC between two observers and CA3DM was 41.2% (p<0.05),first observer and CA3DM was 30.6% (p>0.05), second observer and CA3DM was 51.6% (p<0.05) and twoobservers were 45.8% (p<0.05). For group 2, IOC between two observers and CA3DM was 27.9% (p>0.05),first and CA3DM was 18.6% (p>0.05), second observer and CA3DM was 7.1% (p>0.05) and two observers was49% (p<0.05).Conclusion: Our study shows that posterior malleolar fragment size measuring on plain radiography is not a safemethod for bigger fragments and CA3DM method may be a more reliable to assess correct fragment size andalso to analyze fracture morphology. But for fragments ≤15% CA3DM and plain radiographic measures are notstatistically different.
AtıfOpenAlex1İncele - MakaleAçık Erişim2020EEG Kullanarak 2D&3D Video Geçişinin Tespitinde Frontal ve Temporal Lobların Etkinliği
Melek, Negin; Melek, Mesut; Kayikcioglu, Temel
İnsan gözünün üç boyutlu (3B) yapısı nedeniyle, bu araştırmada 3B teknolojisi kullanılmıştır. Binoküler görmenin yorgunluk esnasında boyut kaybedeceğini iddia ederek 2B ve 3B’ye geçiş analizi önemlidir. Böylece rastgele 2B ve 3B parçalardan oluşan tek akışlı bir video dokuz gönüllü tarafından izlenilmiştir. Gönüllülerin beyin sinyallerinin dinamik davranışı ve güç spektral yoğunluğu (GSY), kapsamlı bir nicel analiz için dikkate alınmıştır. Baskın EEG bantları ve zaman aralıkları, kısa zamanlı Fourier dönüşümüne (KZFD) dayalı güç farklılıklarını analiz ederek 2B’den 3B’ye (2B_3B) ve 3B’den 2B’ye (3B_2B) geçişlerde seçilmiştir. Bu bilgiler dikkate alınarak, etkili özellik çıkarımı ve sınıflandırma teknikleri uygulanarak, gönüllülerin beyin loblarını temsil eden kanalların davranış kalıpları analiz edilmiştir. Öznitelik çıkarma yöntemleri olarak Hjorth parametreleri ve istatistiksel yöntemler kullanılmıştır. 2B_3B ve 3B_2B geçişlerini sınıflandırmak için en yakın komşular (e-YK) ve doğrusal diskriminant analiz (DDA) algoritmaları uygulanmıştır. Sonuçlar, 2B_3B ve 3B_2B geçişlerinin kapsamlı sınıflandırma analizi sayesinde beyin korteksinin aktivite gücünün değişiminin temsil edilebileceğini ortaya koymuştur. Bu geçişleri temsil eden kanallar arasındaki temporal ve frontal lobların baskınlığı göz ardı edilemez.
- MakaleAçık Erişim2020Investigation of the Effect of Differential Morphing on Lateral Flight by Using PID Algorithm in Quadrotors
Oktay, Tugrul; Kose, Oguz
Quadrotor is unmanned aerial vehicles that are widely used in military and civil fields. Quadrotors differ from conventionalhelicopters, which use rotors that are able to vary the pitch of their blades dynamically as they move around the rotor hub. Quadrotorsgenerally use two pairs of identical fixed pitch propellers; two clockwise (CW) and two counterclockwise (CCW). These useindependent variation of the speed of each rotor to achieve control. In this study, the quadrotor lateral flight and the effect ofmorphing on this flight were investigated. Morphing is called the change of unmanned aerial vehicles in their geometry. NewtonEuler method is used to create the quadrotor model. However, since the quadrotor is a system with non-linear dynamics, motionequations are converted to linear equations. The quadrotor full model was drawn in the Solidworks program, including batteries,controllers and propellers, in accordance with its actual dimensions. State space model approach was used in simulations in Matlab /Simulink environment. The value of mass and inertia moments from the Solidworks program is used in the state space model.Proportional integral derivative (PID) was used as the control algorithm. PID is an algorithm widely used in industrial applications.PID is preferred because it is strong, fast and simple. The system to which PID will be applied must be linear. The PID coefficientsKp, Ki and Kd are important for the stable operation of the system. Appropriate values should be chosen. In this study, lateral flightperformance was monitored using differential morphing and PID algorithm and the results were presented.
AtıfOpenAlex9TR Dizin6İncele - MakaleYalnız künye2020The Critique of Abul A'la Mawdudi on the Hadith Deniers in the Indian Subcontinent
Khan, Alam; Kuzudisli, Ali
According to the traditionalist Muslim scholars, the history of the denial ofhadīth in the Subcontinent goes back to the 19th century, and they considered SirSyed Ahmad Khan was the first one who challenged the provenance andauthorship of ahādīth. It is a renowned fact that Sir Syed was highly inspired bywestern research about Islam and its primary sources. Hence, he followed thewestern approach to the Prophetic ahādīth in his works and put in question thecodification and the authenticity of hadith. Mulawī Chiragh Ali and his fellowscholars developed and supported his theories with new arguments that laterreached to the denial of hadīth. At that time, the traditionalist Muslim scholarsof the Subcontinent paid attention to this new-born temptation and counteredthe theories of the deniers of hadīth. Syed Mawdūdī was one of them thatadvocated the Prophetic ahādīth through his research journal Tarjamānu'l-Qurān.However, his unique methodology in criticism distinguished him from hiscontemporaneous scholars. Therefore, this study deals with his research andcritical approach to the theories of the deniers of hadīth.
AtıfTR Dizin1İncele - MakaleYalnız künye2020Twenty Years of Winter Tourism Literature: Bibliometric Analysis of SSCI-Indexed Tourism Journals
Evren, Savaş
The purpose of this study is to determine the development of winter tourism literature during thelast 20 years. The articles (n=292) published in SSCI-indexed tourism journals between 1997 and2016 were reviewed with bibliometric techniques. Findings demonstrated that the mostinvestigated main themes were destination marketing and sustainability, most studies wereconducted with primary data, and secondary data usage increased in recent years. Countries suchas the USA and Canada, institutions such as the University of Innsbruck and Mid-SwedenUniversity, journals such as Scandinavian Journal of Hospitality and Tourism and TourismManagement, and authors such as Martin Falk and Peter Fredman were prominent.
AtıfOpenAlex2TR Dizin2İncele