Production of dental filling composite material with ımproved mechanical and antibacterial properties by zno/chitosan doped silica/pmma core/shell nano hybrid structured ınorganic matrix ZnO/Kitosan katkılı silika/PMMA çekirdek/kabuk nano hibrit yapılı inorganik matris ile mekanik ve antibakteriyel özellikleri geliştirilmiş dental dolgu kompozit malzemesi üretilmesi

Ok, İzel

ABSTRACTOrganic-inorganic (hybrid) dental filling composite resins are becoming increasingly popular as a result of their aesthetic quality, good mechanical properties, optimum wear resistance, and ease of use. However, dental composites have relatively high brittleness, low strength, and durability, which limits applications. Dental filling composites containing nanoparticles have been developed in recent years to address the drawbacks of dental composites. These composites have high filling percentages and provide high strength and durability to the resin. However, the characteristics of the ...Daha fazlası

Control and design of industrial robotic arm by using ROS ROS kullanarak endüstriyel robotik kolun kontrolü ve tasarımı

Candemir, Adem

ABSTRACTIndustrial robots currently used in industry all have their own interfaces and unique languages. These commonly used interfaces and languages are often limited to industry needs. Although there are several robotic solutions, practically all of them can't rectify problems on their own. When a program is required for a more complex task, machine vision locates objects and puts them in desired locations and for situations such as applying the correct force for assembly operations by measuring with force-torque sensors, they often need third-party programs as existing systems cannot respon ...Daha fazlası

Investigation of Optimal Solution Type and Volume for Inflation of Foley Catheter Balloon in Indwelling Urethral Catheterization

AYŞE AKBIYIK

Objective: In this study investigates the effect of the type and volume of solution used in inflation of the foley catheter balloon on the development of urine leakage around the catheter during indwelling urethral catheterization. Material and Method: This randomized controlled experimental study was conducted with 128 patients hospitalized in the intensive care unit and carried out between 2015 and 2019. In each study group, different types and volumes of the solution including 10 mL 0.9% sodium chloride, 15 mL 0.9% sodium chloride, 10 mL sterile distilled water, and 15 mL sterile distilled ...Daha fazlası

Optimizing the load carrying performance of the hydraulic guiding elements with finite elements method

Tanyeri, Cem

ÖZETHidrolik ve pnömatik sistemlerin uzun süreli sorunsuz çalışmasında önemli bir etkiye sahip olan kılavuz elemanlar, hidrolik ve pnömatik silindirlerde eksene dik olan kuvvetlere direnerek metal-metal temasını önlemek için kullanılır. Kılavuz elemanlarda en sık kullanılan malzemelerden biri olan kompozit malzemelerde, fiber yönelimleri ve takviye malzeme oranları gibi farklı parametreler, ürünün kalitesini ve mukavemetini büyük ölçüde etkiler. Bu çalışmada, kompozit kılavuz elemanların sonlu elemanlar yöntemi kullanılarak malzemeden ürüne geçiş aşamalarının ve Digimat, Moldex3D ve MSC Marc p ...Daha fazlası

The effect of local heating on the weld line formation in plastic ınjection molding of acrylonitrile butadiene styrene and glass fiber reinforced polypropylene Akrilonitril bütadien stiren ve cam elyaf takviyeli polipropilenin plastik enjeksiyon kalıplamasında lokal ısıtmanın birleşme izi oluşumuna etkisi

Güler, Muhsin Deniz

ABSTRACTIn this study, the effect of local heating on the weld line formation in a plastic injection mold was studied by using acrylonitrile butadiene styrene (ABS) and polypropylene 20 glass fiber (PP GF20) plastic material. An aluminum 6000 insert was fitted into the injection mold to set temperatures for local heating. The three parameters with three levels were selected for injection molding process parameters as insert temperature, mold temperature, and melt temperature and to produce mechanical tests specimens with weld lines and non-weld lines. L9 orthogonal array was arranged for the T ...Daha fazlası

A Systematic Review on Intragastric Balloons and TransPyloric Shuttle in Obesity Treatment

Endoscopic bariatric procedures in the treatment of obesity have become widespread in recent years. In this systematic review, it was aimed to assess the role of intragastric balloons and transpyloric shuttle in the treatment of obesity. A comprehensive search was conducted using the search terms “Intragastric Balloon” and “TransPyloric Shuttle” in PubMed, Cochrane Library and Web of Science databases from 1st of December to 25th of December in 2020. Twenty-seven clinical studies (24 studies on intragastric balloons and 3 studies on transpyloric shuttle) were assessed. It is clear that both me ...Daha fazlası

The Malnutrition Risk and Physical Activities in Home-Dwelling Older Adults During the COVID-19: A Cross-Sectional Study

Objective: During the COVID-19 pandemic, elderly adults’ nutritional habits, physical activity levels and the levels of malnutrition were affected. This study investigated the prevalence of malnutrition and physical fitness and exercise activity levels in home dwelling elderly during the COVID-19 pandemic. Material and Method: This cross-sectional study was conducted with a face-to-face questionnaire on 670 (male: 241, female: 429) home-dwelling older adults with a mean age of 70.66±5.83 years. The nutritional screening and evaluation were performed using Mini Nutritional Assessment (MNA), and ...Daha fazlası

Evaluation of organic waste materials as bio-polymeric admixtures in cement based composite mortars Organik atık malzemelerin biyo-polimerik katkı olarak çimento bağlayıcılı kompozit harçlarda değerlendirilmesi

Kalkan, Şevket Onur

ABSTRACTIn this study, the effect of a new generation bio-polymeric admixture on the physical and mechanical properties of cement mortars is examined in detail. The bio-polymeric admixture is prepared by grinding egg shells, apricot kernel shells, hazelnut kernel shells, walnut kernel shells, and olive seeds in micronized sizes. The evaluation of the bio-polymeric admixtures, which are produced as wastes, among high production materials such as concrete and mortar derivative products, provides an opportunity for better disposal and management of these wastes.ÖZETBu çalışmada, yeni nesil biyopo ...Daha fazlası

A comparison of the performances of conventional and low salinity water alternating gas injection for displacement of oil Petrolün geleneksel su gaz değişimli ötelenmesi ile az tuzlu su gaz değişimli ötelenmesi yöntemlerinin başarımlarının karşılaştırılması

Bucyanayandi, Emmanuel

ABSTRACTThe oil and natural gas reside in microscopic pores of subsurface rock layers called a reservoir rock. Besides there always at least two phases exist in oil and gas reservoirs. Therefore, the flow and displacement of oil into the production wells are influenced significantly by capillary forces. Due to the capillary and surface forces, the recovery of oil always remains at low percentages usually between 20 to 40. In order to increase the recovery factor several secondary and enhanced oil recovery techniques have been developed and implemented. The two secondary recovery methods namely ...Daha fazlası