Konya Journal of Engineering Sciences最新文献_第7页

DETERMINATION OF RESWELLING PROPERTIES AND WATER DIFFUSION MECHANISM OF HYDROGEL COMPOSITES 水凝胶复合材料溶胀性能及水扩散机理的测定

Konya Journal of Engineering Sciences Pub Date : 2023-05-22 DOI: 10.36306/konjes.1260903

Mehmet Yurttadur, Gülcihan GÜZEL KAYA, H. Deveci

{"title":"DETERMINATION OF RESWELLING PROPERTIES AND WATER DIFFUSION MECHANISM OF HYDROGEL COMPOSITES","authors":"Mehmet Yurttadur, Gülcihan GÜZEL KAYA, H. Deveci","doi":"10.36306/konjes.1260903","DOIUrl":"https://doi.org/10.36306/konjes.1260903","url":null,"abstract":"This study focused on acrylamide/N-vinyl-2-pyrrolidone chemically cross-linked hydrogel composites. As fillers, sepiolite and alkyl ammonium salt modified sepiolite were used in the preparation of the hydrogel composites. Characterization of the hydrogel composites was carried out with X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analyses. Swelling of the hydrogel composites as a function of time was investigated with tea-bag method. Reswelling ability of the hydrogel composites was revealed after the three cycles. In the third swelling test, the swelling percentage of the NVP hydrogel was about 1690%. The swelling percentage of the NVP+MSP hydrogel composite increased from approximately 1610% to 1760% after the three repeated swelling tests. The hydrogel composite including modified sepiolite showed higher equilibrium water content (EWC) in the distilled water and at different pHs compared to other samples. The highest EWC value was obtained for the hydrogel composite including modified sepiolite (0.9637) in alkali conditions. Water diffusion mechanism of the hydrogel composites was examined based on the Fickian diffusion index (n). n values of the hydrogel composites were lower than 0.5 which is indication of water diffusion governed by less Fickian diffusion mechanism. The results showed that hydrogel composites can be used in various applications required the reswelling ability and high EWC value.","PeriodicalId":17899,"journal":{"name":"Konya Journal of Engineering Sciences","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74597369","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

Microfacies and Biofacies Properties of the Lower-Middle Visean Succession of Hadim Nappe (Central Taurides, Southern TÜRKİYE) Hadim推覆体下-中维西世演替的微相及生物相特征(TÜRKİYE)

Konya Journal of Engineering Sciences Pub Date : 2023-05-12 DOI: 10.36306/konjes.1211857

Melikan Akbaş

引用次数: 0

PRODUCTION OF OXIDE DISPERSION STRENGTHENED INCONEL 718 ALLOYS USING CONVENTIONAL POWDER METALLURGY AND ADDITIVE MANUFACTURING METHODS 采用常规粉末冶金和增材制造方法生产氧化物弥散强化铬镍铁合金

Konya Journal of Engineering Sciences Pub Date : 2023-05-11 DOI: 10.36306/konjes.1254946

Eda AYDOĞAN GÜNGÖR

{"title":"PRODUCTION OF OXIDE DISPERSION STRENGTHENED INCONEL 718 ALLOYS USING CONVENTIONAL POWDER METALLURGY AND ADDITIVE MANUFACTURING METHODS","authors":"Eda AYDOĞAN GÜNGÖR","doi":"10.36306/konjes.1254946","DOIUrl":"https://doi.org/10.36306/konjes.1254946","url":null,"abstract":"Oxide dispersion strengthened (ODS) Ni-based alloys having a high density of nano-oxides (NOs) (<10 nm) are considered to be good candidates for extreme environments, such as high temperature, radiation, and corrosion. In this study, ODS IN718 alloys have been produced using conventional powder metallurgy (PM) and novel selective laser melting (SLM) additive manufacturing. The effect of processing routes on the microstructure, in particular on the nano-oxide formation and structure has been investigated. It has been found that the powder metallurgy method that consists of compressing followed by sintering at 1250 and 1500 °C results in a nano-granular structure with homogenously distributed fine nano-oxides having a high number density. Similarly, SLM results in a high number density of fine nano-oxides; however, the particles exist in groups with the grains/cells. The nano-oxides are determined to be Y2Ti2O7, Y2TiO5 or YTiO3 and Y-Al-O. The deviation in the lattice parameters of Y2Ti2O7 infers the existence of some Al in the structure. This study sheds light on producing ODS IN718 alloys with high-density nano-oxides using powder metallurgy and additive manufacturing methods.","PeriodicalId":17899,"journal":{"name":"Konya Journal of Engineering Sciences","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85514084","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 ORANGE PEEL ESSENTIAL OIL ON THE PROPERTIES OF CHITOSAN: GELATIN CASTED FILMS PREPARED FOR ACTIVE PACKAGING 橙皮精油对活性包装用壳聚糖明胶薄膜性能的影响

Konya Journal of Engineering Sciences Pub Date : 2023-05-10 DOI: 10.36306/konjes.1225056

Fatma Demir, G. Gökşen, Didem DEMİR KARAKUŞ

{"title":"EFFECT OF ORANGE PEEL ESSENTIAL OIL ON THE PROPERTIES OF CHITOSAN: GELATIN CASTED FILMS PREPARED FOR ACTIVE PACKAGING","authors":"Fatma Demir, G. Gökşen, Didem DEMİR KARAKUŞ","doi":"10.36306/konjes.1225056","DOIUrl":"https://doi.org/10.36306/konjes.1225056","url":null,"abstract":"Food packaging is a passive barrier that protects food against environmental factors such as ultraviolet light, oxygen, water vapor, pressure, heat, chemical, and microbiological contaminants. In a changing and developing world, consumers now want to reach healthier, fresher, and more diverse foods. In response to consumer demands and expectations, the food sector has focused on developing active and intelligent packaging. The purpose of active packaging is to protect the properties of the food by interacting with the coating material and prolonging the shelf life. In this context, it is aimed to prepare active package films by integrating bioactive agents into films prepared based on biodegradable polymers. It is an important point that is determined how the characteristics of the films such as morphology, molecular structure, surface property, and antimicrobial activity, will shift depending on the type and quantity of bioactive agent addition. Based on this, packaging films loaded with different concentrations of orange peel essential oil (OEO) (25, 50 and 100% of total polymer weight) were produced on the basis of chitosan and gelatin natural polymers. The changes that occur in the active films as a result of the increasing amounts of oil were revealed by determining the molecular structure, surface property, morphological characteristics, solubility quality, and antibacterial activity. The solubility of the films, which is an effective parameter in the evaluation of the environmental impact of the films that will be released as waste after use, varied between 20% and 25% at the end of 48 hours. The 100OEO@CH:GEL film showed the highest antibacterial properties against Escherichia coli and Staphylococcus aureus.","PeriodicalId":17899,"journal":{"name":"Konya Journal of Engineering Sciences","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85884553","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

DATA INTEGRITY AND QUALITY ANALYSIS OF LOW COST ZED-F9P U-BLOX GNSS RECEIVER 低成本zed-f9p u-blox GNSS接收机数据完整性与质量分析

Konya Journal of Engineering Sciences Pub Date : 2023-05-10 DOI: 10.36306/konjes.1268932

Sermet Öğütcü, S. Alcay, H. Duman, Behlül Numan Özdemi̇r, Ülkünur Koray

{"title":"DATA INTEGRITY AND QUALITY ANALYSIS OF LOW COST ZED-F9P U-BLOX GNSS RECEIVER","authors":"Sermet Öğütcü, S. Alcay, H. Duman, Behlül Numan Özdemi̇r, Ülkünur Koray","doi":"10.36306/konjes.1268932","DOIUrl":"https://doi.org/10.36306/konjes.1268932","url":null,"abstract":"Thanks to the rapidly emerging low-cost dual-frequency GNSS receivers, a feasible alternative for geodetic-grade GNSS receivers became available for some GNSS applications. In this study, the performance of data integrity and quality of a low-cost ZED-F9P u-blox GNSS receiver was investigated by comparing it with a geodetic-grade GNSS receiver. Availability of the epoch and phase/code signal channels, signal-to-noise ratio (SNR), code multipath, and cycle slips were analyzed for the geodetic-grade and low-cost ZED-F9P u-blox GNSS receivers. One month’s data of GPS, GLONASS, and Galileo constellations were analysed using the RINEX files of the receivers. The results showed that the epoch availability of the geodetic-grade and u-blox GNSS receiver is comparable to each other, while the availability of phase/code signal channels of the geodetic-grade receiver is higher than the u-blox receiver. In terms of data quality, SNR values from both receivers are comparable, while the multipath level of the u-blox GNSS receiver is significantly higher than the geodetic-grade one. The results also showed that the number of cycle slips of the u-blox receiver is significantly higher than the geodetic-one.","PeriodicalId":17899,"journal":{"name":"Konya Journal of Engineering Sciences","volume":"95 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90221207","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

NUMERICAL ANALYSES OF THERMAL PERFORMANCES OF THE CONVENTIONAL AND THE IMMERSION COOLING METHODS FOR LITHIUM-ION BATTERY PACKS 锂离子电池组常规冷却方式和浸没冷却方式热性能的数值分析

Konya Journal of Engineering Sciences Pub Date : 2023-05-06 DOI: 10.36306/konjes.1242653

Furkan Ergül, K. Tüfekci

引用次数: 0

Effect of Clay Minerals on the Flotation Performance of Coal and Mean Bubble Size 黏土矿物对煤浮选性能及平均气泡尺寸的影响

Konya Journal of Engineering Sciences Pub Date : 2023-05-03 DOI: 10.36306/konjes.1226001

V. Önen, Ayşegül Çağlar, H. A. Taner

{"title":"Effect of Clay Minerals on the Flotation Performance of Coal and Mean Bubble Size","authors":"V. Önen, Ayşegül Çağlar, H. A. Taner","doi":"10.36306/konjes.1226001","DOIUrl":"https://doi.org/10.36306/konjes.1226001","url":null,"abstract":"Flotasyon, ince boyutlu kömürlerin zenginleştirilmesinde kullanılan en etkili yöntemlerdendir. Bununla birlikte, kömürün yan kayaç olarak kil minerallerini bulundurması flotasyon işlemini olumsuz etkilemektedir. Bu çalışmada kil minerallerinin (kaolin ve montmorillonit) ve flotasyon reaktiflerinin Tunçbilek linyit kömürünün flotasyon performansına ve ortalama kabarcık boyutuna etkisi araştırılmıştır. Deneysel çalışmalarda; bastırıcı olarak sodyum silikat, toplayıcı olarak gaz yağı kullanılırken, köpürtücü olarak ise metil izobütil karbinol (MIBC) ve Dowfroth 250 kullanılmıştır. Kil türü ve miktarı, bastırıcı miktarı ve köpürtücü türü ve miktarı çalışılan deneysel parametrelerdir. Bastırıcı miktarı ve kil içeriğinin etkisinin belirlendiği deneysel çalışmalarda, kaolin içerikli numunelerde %40-55, montmorillonit içerikli numunelerde ise %30-47 aralığında yanabilir verim değerleri elde edilmiştir. Köpürtücü olarak Dowfroth 250 ile daha iyi sonuçlar elde edilmiş ve montmorillonit içeren kömür numunesi, kaolin içeren kömür numunesine göre daha büyük kabarcıklar oluşmasına neden olmuştur. Bu çalışmadan elde edilen sonuçlar yan kayaç olarak kil bulunduran kömürlerin flotasyon davranışlarının anlaşılabilmesi ve çözüm önerileri sunulabilmesi için temel bir altyapı oluşturacaktır.","PeriodicalId":17899,"journal":{"name":"Konya Journal of Engineering Sciences","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85703488","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

A DISCRETE PARTICLE SWARM ALGORITHM WITH SYMMETRY METHODS FOR DISCRETE OPTIMIZATION PROBLEMS 用对称方法求解离散优化问题的离散粒子群算法

Konya Journal of Engineering Sciences Pub Date : 2023-04-28 DOI: 10.36306/konjes.1199674

Emine Baş, Gulnur Yildizdan

{"title":"A DISCRETE PARTICLE SWARM ALGORITHM WITH SYMMETRY METHODS FOR DISCRETE OPTIMIZATION PROBLEMS","authors":"Emine Baş, Gulnur Yildizdan","doi":"10.36306/konjes.1199674","DOIUrl":"https://doi.org/10.36306/konjes.1199674","url":null,"abstract":"Particle Swarm Optimization (PSO) is a commonly used optimization to solve many problems. The PSO, which is developed for continuous optimization, is updated to solve discrete problems and Discrete PSO (DPSO) is obtained in this study. With DPSO, the Traveling Salesman Problem (TSP), which is well-known in the literature as a discrete problem, is solved. In order to improve the results, the swap method, the shift method, and the symmetry method are added to DPSO. The symmetry method is a new and successful method. The variations of the DPSO occurred according to the selected method type (DPSO1 (swap method), DPSO2 (shift method), DPSO3 (swap and shift methods), DPSO4 (symmetry method), DPSO5 (swap, shift, and symmetry methods), DPSO6 (swap, shift, symmetry, and 2-opt methods)). The effect of each method on the performance of the DPSO has been studied in detail. To demonstrate the success of the variations of the DPSO, the results are additionally compared with many well-known and new discrete algorithms in the literature. The results showed that the performance of DPSO has improved with the symmetry method and it has achieved better results than the discrete heuristic algorithms recently proposed in the literature.","PeriodicalId":17899,"journal":{"name":"Konya Journal of Engineering Sciences","volume":"96 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78761383","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

FEATURES OF THE HAJAR AL‐ASWAD, BLACK STONE OF MAKKAH, SAUDI ARABIA hajar al - aswad的特征，黑色石头的麦加，沙特阿拉伯

Konya Journal of Engineering Sciences Pub Date : 2023-04-24 DOI: 10.36306/konjes.1244222

K. Kocak

引用次数: 0

SİLAH GERİ TEPME VE ŞAHLANMA TEST MAKİNASI TASARIMI VE SİMULASYONU

Konya Journal of Engineering Sciences Pub Date : 2023-03-01 DOI: 10.36306/konjes.1199857

Orhan Koç, Mustafa Tinkir

引用次数: 0