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Bulunan: 58 Adet 0.001 sn
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Filtreler
Filtreler
Bulunan: 58 Adet 0.001 sn
Yayın Tarihi : 2020 ✕Koleksiyon : Mühendislik ve Doğa ... ✕
Koleksiyon [6]
İlgili Araştırmacılar [20]
Ambargo Durumu [1]
Tam Metin [1]
Yayın Türü [3]
Yazar/lar [20]
Atıf Dizini [3]
Konu Başlıkları [20]
Yayıncı [13]
Yayın Tarihi [1]
Yayın Dili [3]
Erişime Açık

Water level change of lakes and sinkholes in Central Turkey under anthropogenic effects

DEMİR, Vahdettin | ÜLKE KESKİN, Aslı

Determining water level changes in lakes is significant for sustainable water supply planning, flood control, water resource management, and economic development with ecosystem sustainability. Trend analysis is a commonly used tool for detecting changes in hydrologic time series of quantities such as lake level, precipitation and temperature. Trend analysis of meteorological variables is very important for assessing the long-term changes in lake levels. This study examines long-term changes in the lakes in the Central Anatolia region of Turkey. Kızören and Timraş sinkhole lakes and Lakes Tuz a ...Daha fazlası

Makale 2020 Theoretical and Applied Climatology 3 Görüntülenme
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Investigation Of Applications Of Fibonacci Sequence And Golden Ratio In Music

BAKIM, Sümeyye | YÖRE, Seyit

In studies presented in the literature, relationships between music and mathematics can sometimes be observed. Leonardo Fibonacci (1170-1250) is well known in mathematics with the Fibonacci Sequence and this sequence used to identify numbers in various music elements, too. In related studies, these numbers have been used to demonstrate the existence of the ‘Golden Ratio’ using methods and theories borrowed from the components of music. Nevertheless, this relationship has subsequently been seen inaccurate. The studies that previously based some works of Chopin, Mozart, Beethoven, Bach and Bartó ...Daha fazlası

Makale 2020 4 Görüntülenme
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İki Linkli Robot Manipülatörün Modellenmesi ve Bozucu Etki Altında Yörünge Kontrolü

İLGEN, Sinan | DURDU, Akif | GÜLBAHÇE, Erdi | ÇAKAN, Abdullah

Bu çalışmada, iki linkli düzlemsel bir robot manipülatörün bozucu etki altında yörünge kontrolü yapılmıştır. ADAMS yazılımı vasıtasıyla manipülatörün sanal bir prototipi oluşturulmuştur. Ayrıca, sistem için gerekli olan kontrolcü tasarımı MATLAB/Simulink ortamında gerçekleştirilmiştir. Sistemin simülasyonu ise MATLAB ve ADAMS yazılımlarının eş zamanlı olarak çalıştırılması ile gerçekleştirilmiştir. Robot manipülatör iki giriş ve dört çıkışa sahiptir. Girişler, her iki eklemin tahriki için gerekli olan motor torkları, çıkışlar ise her iki eklemin açıları ve uç elemanın konumunun x-y bileşenleri ...Daha fazlası

Konferans Bildirisi 2020 IEEE 7 Görüntülenme
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Trend Analyses of Meteorological Variables and Lake Levels for Two Shallow Lakes in Central Turkey

YAĞBASAN, Özlem | DEMİR, Vahdettin | YAZICIGİL, Hasan

Trend analyses of meteorological variables play an important role in assessing the long-term changes in water levels for sustainable management of shallow lakes that are extremely vulnerable to climatic variations. Lake Mogan and Lake Eymir are shallow lakes offering aesthetic, recreational, and ecological resources. Trend analyses of monthly water levels and meteorological variables affecting lake levels were done by the Mann-Kendall (MK), Modified Mann-Kendall (MMK), Sen Trend (ST), and Linear trend (LT) methods. Trend analyses of monthly lake levels for both lakes revealed an increasing tre ...Daha fazlası

Makale 2020 Water 8 Görüntülenme
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Prediction and sensitivity analysis under different performance indices of R1234ze ORC with Taguchi’s multi-objective optimization

ATA, Sadık | KAHRAMAN, Ali | ŞAHİN, Remzi

In this study, parametric optimization and sensitivity analysis of performance parameters were performed for the Organic Rankine Cycle (ORC) system at 120 °C heat source temperature. R1234ze, which is called the new-generation fluid, was used in the ORC design. Performance parameters have been selected considering Energy, Exergy, Economy (Turbine performance) and Environmental (Thermodynamic sustainability indices) factors. Six performance indices used in the orthogonal design with Taguchi-ANOVA. These are; thermal efficiency, turbine power, exergy efficiency, total irreversibility, Volume Flo ...Daha fazlası

Makale 2020 Case Studies in Thermal Engineering 4 Görüntülenme
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Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √ sNN = 2.76 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

In this paper, the first femtoscopic analysis of pion–kaon correlations at the LHC is reported. The analysis was performed on the Pb–Pb collision data at √sNN = 2.76 TeV recorded with the ALICE detector. The non-identical particle correlations probe the spatio-temporal separation between sources of different particle species as well as the average source size of the emitting system. The sizes of the pion and kaon sources increase with centrality, and pions are emitted closer to the centre of the system and/or later than kaons. This is naturally expected in a system with strong radial flow and ...Daha fazlası

Makale 2020 9 Görüntülenme
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Unveiling the strong interaction among hadrons at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

One of the key challenges for nuclear physics today is to understand from frst principles the efective interaction between hadrons with diferent quark content. First successes have been achieved using techniques that solve the dynamics of quarks and gluons on discrete space-time lattices1,2 . Experimentally, the dynamics of the strong interaction have been studied by scattering hadrons of each other. Such scattering experiments are difcult or impossible for unstable hadrons3–6 and so high-quality measurements exist only for hadrons containing up and down quarks7 . Here we demonstrate that meas ...Daha fazlası

Diğer 2020 5 Görüntülenme
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The effect of nanoclay particles on the incubation period in solid particle erosion of glass fibre/epoxy nanocomposites

BAĞCI, Mehmet | ŞÜKÜR, Emine Feyza | DEMİRCİ, Musa | KAYBAL, Halil Burak

During erosion tests of glass fibre/epoxy nanocomposites, an incubation period emerged because of the embedding of abrasive particles into the target material. In this study, the effect of this period on solid particle erosion behaviour was investigated for glass fibre/epoxy composites with the addition of nanoclay. The surface erosion characteristics of the composites were obtained by solid particle erosion tests using angular alumina particles with a size on the order of 400 μm as the erodent. The tests were conducted using impact velocities of ~23 or ~34 m/s and impingement angles of 30°, 6 ...Daha fazlası

Makale 2020 Wear 3 Görüntülenme
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Experimental and analytical investigation of chemical anchors’s behaviour under axial tensile

MÜSEVİTOĞLU, Abdullah | ARSLAN, Musa Hakan | AKSOYLU, Ceyhun | ÖZKIŞ, Ahmet

In this study, to observe the behavior of chemical anchors embedded in concrete under the tensile effect,108 different anchor specimens were prepared with different parameters as concrete compressivestrength, reinforcement bar diameters, anchor depths, sizes of drilled holes, cleanliness of the drilledholes. Pull-out tests were conducted and obtained data were examined with the axial-load capacitiesand the failure situations. Finally, the depth of anchors, compressive strength and reinforcement diame-ter were observed to increase the axial-load-bearing capacity. The specimens cleaned with wate ...Daha fazlası

Makale 2020 9 Görüntülenme
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Katkı malzemelerinin fazla kullanılmasının betona etkisi: Vaka analizi

İLGÜN, Abdulkerim | TÜRKER, İlker Yılmaz | MÜSEVİTOĞLU, Abdullah | Çöğürcü, Mustafa Tolga

Dünya’da beton katkı malzemeleri 1870’li yıllarda araştırılmaya başlanmıştır. 1930’lı yılların başından itibaren su azaltıcı katkılar ile ilgili araştırmalar yapılmaya başlamıştır. Bu tür katkılar 1940-1960 yılları arasında beton karışımlarında kullanılmış olsa da nasıl bir etki yarattığı tam olarak bilinmediği için yaygınlaşmamıştır. Yapılan araştırmalar; beton karışımına eklenen katkı malzemelerinin belirlenmiş oranlarda ilave edilmemesinin, betonun dayanım, dayanıklılık gibi mekanik özelliklerinin yanı sıra, priz süresi, çökme değeri gibi işlenebilirlik özelliklerini de olumsuz etkilediğini ...Daha fazlası

Makale 2020 Karamanoglu Mehmetbey University Journal of Engineering and Natural Sciences 6 Görüntülenme
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Investigation of optimal designs for concrete cantilever retaining walls in different soils

URAY, Esra | ÇARBAŞ, Serdar | ERKAN, İbrahim Hakkı | OLGUN, Murat

In this paper, the investigation of the optimum designs for two types of concrete cantilever retaining walls was conducted utilizing the artificial bee colony algorithm. Stability conditions like safety factors of sliding, overturning and bearing capacity and some geometric instances due to inherent of the wall were considered as the design constraints. The effect of the existence of the key in wall design on the objective function was probed for changeable properties of foundation and backfill soils. In optimization analysis, the concrete of the wall, which directly affects parameters such as ...Daha fazlası

Makale 2020 CHALLENGE JOURNAL OF CONCRETE RESEARCH LETTERS 3 Görüntülenme
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Variational approximate for high order bending analysis of laminated composite plates

MADENCİ, Emrah | ÖZÜTOK, Atilla

This study presents a 4 node, 11 DOF/node plate element based on higher order shear deformation theory for lamina composite plates. The theory accounts for parabolic distribution of the transverse shear strain through the thickness of the plate. Differential field equations of composite plates are obtained from energy methods using virtual work principle. Differential field equations of composite plates are obtained from energy methods using virtual work principle. These equations were transformed into the operator form and then transformed into functions with geometric and dynamic boundary co ...Daha fazlası

Makale 2020 STRUCTURAL ENGINEERING AND MECHANICS 7 Görüntülenme
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