TR Dizin İndeksli Yayınlar Koleksiyonu / TR Dizin Indexed Publications Collections

Permanent URI for this collectionhttps://hdl.handle.net/20.500.13091/4

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30 Ekim 2020 Ege Denizi Depreminin Kabuk Deformasyonuna Etkisinin Tusaga-aktif Verileri ile İncelenmesi
(Gumushane University, 2024) Baş, İ.Ç.; Abbak, R.A.
The TUSAGA-Active (Turkish National Continuous Operating Reference System) is available for commercial and academic studies with 168 fixed GNSS (Global Navigational Satellite Systems) stations. Its capability to provide high-accuracy data facilitate to monitor deformations in engineering structures resulting from crustal movements. On October 30, 2020, an earthquake with a magnitude of ML = 6.6 (MW = 6.9) struck the Aegean Sea at 14.51 local time. The aim of the study is that TUSAGA-Active stations located within the earthquake-affected area are thoroughly examined to detect any crustal deformations caused by this seismic event. As part of this analysis, deformation directions and magnitudes were determined for stations AYD1, CESM, DIDI, IZMI, KIKA, and SALH. RINEX data from 15 days before the earthquake date and 11 days after were processed using CSRS-PPP (Canadian Spatial Reference System Precise Point Positioning Service) and OPUS (Online Positioning User Service), which are internet-based GNSS services. The results of this analysis revealed that the CESM station experienced the most significant displacement, averaging 57.39 mm in the north direction according to the CSRS-PPP service. Similar results were obtained from the OPUS service data. © 2024, Gumushane University. All rights reserved.
Arazi Toplulaştırma Projelerinde Parsel Şekil Değişiminin Nicel Değerlendirmesi: Konya İli Çumra İlçesi Abditolu Mahallesi Örneği
(Gumushane University, 2021) Ertunç, E.
Land consolidation (LC) are projects that combine scattered and fragmented parcels, improving parcel shapes, and enabling the development of irrigation, drainage and road services for landowners. Improving existing parcel shapes is one of the most important benefits of Land Consolidation projects. There are many indexes that determine the parcel shape change before and after land consolidation. These are Shape Index (SI), Fractal Size Index (FD), Area Shape Factor (AFF), Shape Factor (FORM), Area Perimeter Ratio (APR), Square Pixel Scale (SqP) and Compactness Index (Icmp). These indexes are used in the literature to quantitatively measure the suitability of parcel shapes for modern agriculture. In this study, parcel shape changes pre-consolidation and post-consolidation have investigated by using the data of Abditolu land consolidation project in Çumra district of Konya. Therefore, SI, FD, AFF, FORM, APR, SqP and Icmp, which are among the shape index indicators, have used. As a result of the study; FD, SI, AFF, FORM, SqP, APR and Icmp average values before LC are 1.3579, 1.8486, 0.0424, 0.5334,-0.7819, 6.5530 and 0.5334, respectively; after the LC, it has calculated as 1.3084, 1.3912, 0.0465, 0.5848,-0.8478, 4.9320 and 0.5848. According to the results, there has a general improvement in parcel shapes before and after the LC. FD, SI, FORM, Icmp indexes better reflected parcel shape change before and after LC. © 2021, Gumushane University. All rights reserved.
Betonda Atık Vermikülit Kullanımının Betonun Mineralojik ve Kimyasal Yapısına Olan Etkisinin İncelenmesi
(Gumushane University, 2022) Karakaya Harmanci, F.N.; Soğancioğlu Kalem, M.
Today, new approaches are emerging regarding the recycling of waste materials and their use in building materials. With the reuse of these wastes, important environmental problems are avoided and the raw materials to be used in the production of building materials are also saved. From this point of view, within the scope of this study, it is aimed to evaluate the waste vermiculite mine, which is an important environmental problem and has not yet found an evaluation area, instead of aggregate in the concrete. In this context, the characterization of waste vermiculite (AVK) replaced with fine aggregate and the chemical and mineralogical compositions of the obtained concrete samples were revealed by SEMEDS, FTIR and XRD analyzes, and the chemical and mineralogical changes in the structure of the concrete were associated with the compressive strength of the concrete. According to the results obtained, the decrease in the compressive strength of the concrete with the increase of the waste vermiculite dose and the bound functional O-H groups seen in the chemical structure of the concrete show that the concrete mixture needs extra water. However, as a result of the obtained results, it has been shown that concrete containing low doses of waste vermiculite can be used in structural areas where the compressive strength is not important. © 2022, Gumushane University. All rights reserved.
Effects of Green and Innovative Pretreatment Techniques on Kinetic Parameters of Sunflower Seed Husk
(Gumushane University, 2024) Goktepeli, G.
The effects of green pretreatment processes, such as ultrasonic process (US) and deep eutectic solvent (DES), applied to the biomass on kinetic parameters are as important as their effects on characteristic properties. Process conditions and course of reaction progression depend on the knowledge about kinetic parameters, activation energy and reaction model of thermal degradation in scale-up studies. Therefore, in this study, the change in the kinetic parameters with US applied with both distilled water and DES (glycerol:sodium acetate) at 100 W power and 20 kHz frequency for 10 minutes to sunflower seed husk (SSH) was revelaed. Isoconversional methods Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO) were preferred for the evaluation of activation energy of SSH and pretreated SSH at 15°C/min, 20°C/min and 25°C/min heating rates. US pretreatment with DES instead of water resulted in increment of average activation energy values (Ea) from 113.13 to 143.65 kJ/mol in the KAS method. Ea values for all SSH samples changed in the range of 87.72-143.65 kJ/mol and higher Ea values was obtained with KAS method for pretreated SSH samples. Consequently, the use of DES in US pretreatment was more effective to change kinetic parameters of SSH compared to water. © 2024, Gumushane University. All rights reserved.
Examination of Vertical Green Facades and Green Roofs in Terms of Ecological Criteria and Evaluation of Energy Efficiency
(Gumushane University, 2021) Geyikli, H.B.; Canan, F.
In this study, it is aimed to determine the results of the usage of vertical green façade and green roof systems which are increasing in use today, in four different climatic zones of our country, considering the annual heating, cooling and total energy consumption. Based on a building model in the study, the effect of the green facade and green roof applications on the buildings' annual heating and cooling loads was tried to be determined for four cities of our country with four different climatic characteristics. In selected cities in these climate regions, a traditional building and buildings with vertical green facades and green roof applications were compared. Situated in Turkey's four different climatic zones with the results achieved in this study was found to be differences in four different city's annual energy consumption. In the annual total energy consumption; Antalya city with 2.68% as a result of application of only planted roof systems, Konya city with 11.64% as the result of application of only vertical green façade systems, and highest benefit rates in Erzurum city with application of both systems and 14.38% at the end. As a result of this, considering the annual total energy consumption, green facades and green roof applications in buildings are found to have a positive effect on the energy performance of the building, even though it does not vary from region to region. © 2021, Gumushane University. All rights reserved.
Farklı Savak Yüksekliğine ve Konfigürasyona Sahip Dairesel Labirent Savakların Deneysel Modellenmesi
(Gumushane University, 2023) Yildiz, A.; Marti, A.İ.; Göğüş, M.
Due to their zigzag geometry in plain view, labyrinth weirs require less crest length compared to linear weirs in the dam body or in the channels where they are placed. In this study, the effect of the number of cycles (N) and weir heights (P) of the semi-circular labyrinth weirs on the flow efficiency was investigated. Semi-circular labyrinth weirs, unlike triangular and trapezoidal labyrinth weirs, increase the discharge efficiency by making the areas that reduce the flow capacity at the intersection areas more efficient and by allowing the flow to move in a more perpendicular direction to the weir walls. The experiments were carried out on 3 different configurations (N=2, 3 and 4) depending on the number of semi-circles they contain. In all configurations, a total of 3 weir heights (P=0.20, 0.30 m and 0.40 m) were used and 9 test setups were prepared. In addition, to reference the results obtained from circular weirs, experiments were carried out with linear weirs at 3 different weir heights (P=0.20, 0.30 m and 0.40 m), and a total of 12 experiments were carried out. n this study, the effect of the number of cycles (N) and weir heights (P) of the semicircular labyrinth weirs on the discharge efficiency was investigated. The results obtained from the circular labyrinth weir experiments were compared with previous studies and it was seen that the semi-circular labyrinth weirs had higher discharge capacity than the triangular labyrinth weirs. In addition, semi-circular labyrinth weirs provided a longer effective crest length than the triangular form with the same channel width, they provide higher flow rates at the same weir load. © 2023, Gumushane University. All rights reserved.
Field, Mineralogical and Petrographic Features of the Micro-Vesiculated Mafic Enclaves in the Miocene Lava Around Sağlik and Yatağan Area, Western Konya/Türkiye
(Gumushane University, 2024) Koçak, K.
Various Mafic Microcrystalline Enclaves (MMEs) occur in variable sizes (from a few cm to a few meters) and shapes (ellipse/rounded-angular) with well-developed chilled margin in lava dome complex as part of the subduction-related Neogene Erenlerdagi volcanic activity at the west of Konya. In/around MME, some angular-rounded space developed, possibly due to shrinking after magma degassing, and sometimes filled by calcite. Petrographical and modal image analysis shows that the micro-vesiculated MME contains plagioclase (10-84 %, 0.09-3.1 mm), amphibole (10-25%, 0.16- 1.64 mm), clinopyroxene (7-20%, 0.37-0.77 mm), quartz (0-10%, 0.2-0.6 mm), biotite (0-5%, 0.81-1.63 mm), epidote (0-10%, 0.1-0.7 mm), piemontite (0-9%, 0.17-0.55mm), allanite (0-9%, 0.17-0.55 mm) and opaque iron ore (4-54%, 0.03- 0.67 mm) as major constituents with accessory apatite and zircon in a diktytaxitic-like and hypidiomorph granular texture. The MME also contain older and smaller enclaves (MMEs), which are composed of plagioclase (20-82%), brownish amphibole (9-25%), clinopyroxene (5%), quartz (3-10%), epidote (10-25%), and opaque iron ore (10-35%) in a diktytaxitic-like texture. MMEs are suggested to be formed by syn-eruptive mafic (basaltic?) magma underplating of a dacitic magma reservoir at the lower crust, possibly triggering the eruptions of silicic domes by an overpressure build-up. © 2024, Gumushane University. All rights reserved.
Field, Mineralogical And Petrographic Features Of The Miocene Lava Around Sağlık And Yatağan Area, Western Konya/Türkiye
(Gumushane University, 2024) Koçak, K.
Extensive lava domes occur west of Konya as a component of subduction-related Neogene Erenlerdağı volcanism. These light grey to grey-coloured domes commonly give rise to topographic elevations and contain some Mafic Microcrystalline Enclaves (MME) with a well-developed chilled zone, up to 4 mm thick. Petrographical and modal image analysis show that the lava samples consist predominantly of plagioclase (andesine, 8-46%, 0.11-4.3 mm), amphibole (3-17%, 0.14-1.613 mm), clinopyroxene (0-14%, 0.035-1.845 mm), biotite (3-12%, 0.09-2.30 mm), epidote (0-8%, 0.078-0.166 mm), piemontite (0-3%, 0.145-0.562 mm), quartz (0-6%, 0.4-2.0 mm), sanidine (0-5%, 0.10-0.17 mm), and opaque iron ore (3-43%), along with accessory minerals apatite and zircon, in various textures, including holocrystalline porphyritic, hypocrystalline porphyritic, glomeroporphyritic, and synneusis. The chilled zone is characterised by phenocrysts of plagioclase (25%) and amphibole (5%) in a holocrystalline porphyritic texture. The amphibole shows opacification and calcitization. The matrix includes plagioclase, amphibole (0.3-0.4 mm), epidote, opaque minerals and rare volcanic glass. The petrographical study suggests that the lava likely experienced mixing or mingling processes during the replenishment of felsic magma by mafic magma, potentially triggering a volcanic eruption. The crystallisation of skeletal and acicular microphenocrysts of plagioclase and acicular apatite indicates rapid crystallisation under undercooled conditions. © 2024, Gumushane University. All rights reserved.
Kaz Dağı Civarındaki Kazdağ Masifi Metamorfitlerinin Metamorfizma Özellikleri, Edremit – Balıkesir
(Gumushane University, 2023) Kansun, G.; Ökmen, G.
The Kazdağ Massif begins with Fındıklı formation, which consists of amphibole gneisses, micaschists and metacarbonates. On top, with a tectonic contact, Tozlu formation consisting of amphibolites and metaophiolites and Sarıkız formation consisting of crystallized limestones are observed. At the top, again with a tectonic contact, Sütüven formation, which is mostly made of gneisses, is located. Initially, Kazdağ Massif was exposed to a progressive metamorphism from epidote-amphibolite facies (430-500oC temperature-5-8 kbar pressure) to staurolite-almandine sub-facies of amphibolite facies (550-625oC temperature-5-8 kbar pressure-20-30 km depth) whose effects are observed in Fındıklı and Sütüven formations. In the Tozlu formation, the metamorphism is initially observed in amphibolite facies. Later, the Massif underwent the progressive metamorphism in the sillimanite-almandine-orthoclase sub-facies of the upper amphibolite facies at 650-725oC temperature-3-6 kbar pressure and at 10-20 km depth. This metamorphism is observed in Fındıklı and Sütüven formations. These second metamorphism effects are not observed in Tozlu formation. Therefore, amphibolite facies metamorphism of Tozlu formation developed in a different environment. Tozlu formation is the separate tectonic slice within Kazdağ Massif. The emplacement of Tozlu formation into Kazdağ Massif, and therefore the tectonic slicing of Kazdağ Massif within itself, must have been after second metamorphism stage in upper amphibolite facies. After this tectonic slicing, the whole of Massif underwent the regressive metamorphism in greenschist facies at 375-430oC temperature-2-3.5 kbar pressure and at depth of ~10 km. © 2023, Gumushane University. All rights reserved.
Ultrasonik İşlemin Linyit Süspansiyonunun Yağ Aglomerasyonu Üzerine Etkisi
(Gumushane University, 2023) Eşmeli, K.
The use of ultrasonic process has mostly been investigated for the flotation process in coal fines, but its application to agglomeration with oils is extremely limited. Therefore, the purpose of present study is to investigate the influence of ultrasound treatment on the oil agglomeration of lignite using kerosene. Ultrasonic process was used in two different ways, at the pretreatment stage and at the agglomeration stage, and different results were found. The use of ultrasonic at the pretreatment stage reduced the ash content of the lignite suspension and increased the combustible recovery. On the other hand, the use of ultrasonic at the agglomeration stage adversely affected the agglomeration of lignite. Other factors affecting the oil agglomeration were the power of ultrasonic and the duration of process, and it was concluded that the agglomeration success was increased by the low power value and the short-term ultrasonic process. As a result, coal with an ash content of 26.02% was cleaned with an ash content of 10.03% and a combustible recovery of 79.06% by ultrasonic pretreatment under optimal conditions. © 2023, Gumushane University. All rights reserved.

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