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Hittite Journal of Science and Engineering
ISSN 2148-4171 · Hitit University · 345 artikel di indeks
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Artikel Jurnal
A Research: Investigation of Financial Applications with Blockchain Technology
Cryptocurrencies have revolutionized the financial landscape by providing decentralized and anonymous payment systems, making them an intriguing subject for investors and researchers. This article delves into applying machine learning techniques for predicting cryptocurrency prices, mainly focusing…
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Artikel Jurnal
Comparison of Geological Structures and Satellite-based Tectonic Lineaments in Gülağaç (Aksaray) and its Surroundings
The study area covers the Gülagaç district of Aksaray and its surroundings in the Central Anatolia region of Turkey. The basement of the study area consists of metamorphic rocks belonging to the Paleozoic–Mesozoic-aged Kaman Group. Mesozoic-aged ophiolites overlie these rocks, and both are cut by…
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Evaluating the Combined Effects of Transverse Pitch Ratio and Flow Arrangement on the Thermo-Hydraulic Performance of a Novel Inclined Delta Winglet
In this work, the in-depth examinations of the Novel Inclined Delta Winglet (NIDW) in terms of heat transfer performance and the flow characteristics are conducted at Re=5000-17500, utilizing (SST) k-ω turbulence model. In accordance with the objective of this investigation, the combined effects of…
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Artikel Jurnal
Investigation of the Defect Effects on the Load-Carrying Capacity of Butt Joints: A Numerical Study
Determining the behavior of joints under a specific load and estimating the damage potential is essential for ensuring the durability of joints in engineering structures. Defects might occur at the adhesive layer, which causes a reduction in the durability of joints. This work aims to examine the…
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Artikel Jurnal
Size Dependent Compressive Strength of FIB Machined Single Crystal Manganese Pillars
The deformation behavior of single crystals of manganese pillars generated by focused ion beam (FIB), with diameters ranging from ~1 m to ~4.5 m, has been studied as a function of specimen size using micropillar compression at ambient temperature. The manganese pillars were machined from randomly…
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Artikel Jurnal
Polyvinylalcohol/Polyethyleneimine Hydrogels: Evaluation of Swelling, Dehydration and Antibacterial Activity
In the present study, Polyvinylalcohol/polyethyleneimine (PVA/PEI) hydrogels designed with different Glutaraldehyde (Glu) amount, PEI amount and PVA concentration were synthesized via solvent casting technique. The fabricated PVA/PEI hydrogels with different compositions were evaluated for swelling…
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Artikel Jurnal
Experimentally Performance Evaluation of a Dual Evaporator Ejector Refrigeration System with Diffuser Outlet Split Configuration under Varied Compressor Inlet Pressures
In this research, an experimental investigation was conducted on a dual-evaporator ejector system (DEES). The experiments were conducted under two distinct configurations, known as condenser outlet split (COS) and diffuser outlet split (DOS), across varying compressor inlet pres-sures. The system…
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Synthesis and Characterization of Porous Materials from Waste Wheat Bran
The purpose of this study was to investigate how the amount of ZnCl2 and temperature affect the process of converting waste wheat bran, known for its hemicellulose struc-ture, into porous material. The characterization of the wheat bran was done using proximate and primary component analysis, and…
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Artikel Jurnal
Preliminary Results on Deformations of the Central North Anatolian Fault Zone
The North Anatolian Fault Zone (NAFZ) in the north of Türkiye is considered one of the most active faults on earth and have caused many major earthquakes in the last century. Surface ruptures by those earthquakes indicate that this tectonic feature consists of many segments, which reveal different…
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Artikel Jurnal
Microstructural Evolution and Mechanical Properties of Y Added CoCrFeNi High-entropy Alloys Produced by Arc-melting
The CoCrFeNi high entropy alloy (HEA) with face-centered cubic (FCC) crystal structure exhibits excellent ductility values even at cryogenic temperatures. However, since this HEA is relatively weak in strength, it may not meet the requirements of industrial applications in terms of…
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Artikel Jurnal
Sensitivity Analysis of Wear on Metal-On-Metal Bearing Couples via Verification of Numeric and Analytic Methods
Wear mechanism is important since it leads to revisions in Total Hip Replacement (THR) surgeries. Contact pressure plays an important role in wear mechanisms and needs to be investigated in detail to obtain more accurate wear predictions to understand the wear performance of the implant in the…
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Artikel Jurnal
Noise Analysis For Active Element Based Capacitor Multipliers
In this study, comprehensive noise analyses and optimization of two different capacitance multiplier structures have been presented. Capacitor multipliers, essential in low frequency applications due to capacitors’ significant chip area requirement, play a significant role in high precision analog…
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Artikel Jurnal
Analysis of the Effects of Infusion Drips on Flow Rate and Volume Determination in IV Systems
In this study, drop form flow examinations, which form the basis of IV applications used for therapeutic purposes, were performed. Fluid Intravenous (IV) is the practice of administering fluids into a vein. In IV applications, flow must be monitored in order to follow and control the treatment…
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Artikel Jurnal
Design of Image Processing-based System for Detection of Heat Transfer Direction in Thermoelectric Modules
It is extremely important for the performance and success of the system to know the cooling or heating surfaces of the thermoelectric modules (TEMs) as cooler or generator, according to the heat transfer direction, and to carry out their installation correctly, taking this into account. In TEMs…
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Artikel Jurnal
COVID-19 Diagnosis from Blood Gas Using Multivariate Linear Regression
With the impact of the COVID-19 outbreak, almost all scientists and nations began to show great interest in the subject for a long time. Studies in the field of outbreak, diagnosis and prevention are still ongoing. Issues such as methods developed to understand the spread mechanisms of the disease…
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Artikel Jurnal
Assessment of Human Sperm Kinematic Parameters Using Computer-Assisted Semen Analysis
Infertility affects approximately 15% of couples trying to conceive, as reported by the World Health Organization. It is diagnosed when conception does not occur despite unprotected intercourse over the course of at least one year. The spermiogram test is a fundamental tool for identifying whether…
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Artikel Jurnal
High-Precision UAV Photogrammetry with RTK GNSS: Eliminating Ground Control Points
The advancements in Unmanned Aerial Vehicles (UAVs) have significantly enhanced the capability of the photogrammetric approaches, particularly with the integration of Real-Time Kinematic (RTK) sensors. That approach enables the operators to use the Global Navigation Satellite System (GNSS) more…
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Artikel Jurnal
Polyethylenimine-Assisted Aggregation of β-Galactosidase from Kluyveromyces lactis
Using PEI as an aggregating agent with β-galactosidase from Kluyveromyces lactis was investigated with no solid support. PEI, a cationic polymer initiated instant aggregation with the enzyme in solution. The factors affecting the aggregation such as PEI to enzyme ratio, glutar aldehyde for…
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Artikel Jurnal
Effect of Crusher Arm Position and Surface Friction on the Mechanical Behaviour of a Crusher under Static Conditions
Crushers are utilized to break down or crush various components in industrial applications are subjected to high stresses. The crushing process is carried out by a crusher arm located on the crusher itself. The shape and length of the crusher arm influence the deformation on the arm and the…
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Artikel Jurnal
A Fabrication Method for Memristors with Graphene Top Electrodes and their Characterization
In recent years, there has been extensive research on the memristor, a non-volatile memory device that demonstrates effective emulation of biological synapses. The implementation of graphene as a top electrode in memristive switching systems presents an intriguing alternative to conventional…