Cochlear Electrode Insertion Training Model,
2025
The University of Akron
Cochlear Electrode Insertion Training Model, Sarah Powell, Kaelyn E. Kraley, Nathan J. Smith
Williams Honors College, Honors Research Projects
Cochlear implant surgery is a delicate procedure performed by Otolaryngologists (ENTs) to implant an electronic device into the inner ear to provide a sense of sound for people who are profoundly deaf or hard of hearing. The current practices of training involve cadavers and 3D-printed models. Cadavers are commonly used but are expensive, single-use, and do not provide visual and haptic feedback, which are essential for medical students. 3D printed models are less commonly used and are hard to fabricate and not as realistic. If medical students are not properly trained for this delicate procedure, then risks are significantly increased …
Realization Of Water Tidal Datum Levels From Observed Sea Level Data In Damietta Harbor, Egypt,
2025
Department of Civil Engineering, Faculty of Engineering, Benha University, Benha, Egypt; Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
Realization Of Water Tidal Datum Levels From Observed Sea Level Data In Damietta Harbor, Egypt, Mohamed M. Helmy, Amr N. Shokry, Mohamed M. Youssef, Ahmed M. Khedr
Mansoura Engineering Journal
Sea level is an essential oceanographic parameter in hydrographic surveying that is always necessary for the realization of Chart Datum (CD). The International Hydrographic Organization (IHO) defines sea levels as those expected to occur under typical meteorological conditions, regardless of any possible combination of astronomical conditions. The current research focuses on analysing the observed sea level in Damietta Harbor, using two sets of sea-level records obtained from two sensors: a pressure sensor and a radar sensor. These records were collected from a tide gauge station located at Damietta Harbor from July 1, 2019, to March 2, 2020. Furthermore, harmonic analysis …
Durability Of Precast Prestressed Concrete Pile In Exposure Severe Environment,
2025
Chulalongkorn University
Durability Of Precast Prestressed Concrete Pile In Exposure Severe Environment, Nantawat Khomwan, Pinai Mungsantisuk
Journal of Metals, Materials and Minerals
This research project focuses on studying the corrosion resistance of precast prestressed concrete (PC) piles under severe conditions. All PC and non-PC samples were cast using Portland cement type III. The samples included 1 m and 6 m length specimens. To evaluate the effectiveness of corrosion prevention, Sacrificial Anode Cathodic Protection (SACP) was installed in the specimens. Various durability properties of concrete were tested, including chloride permeability, concrete resistivity, and half-cell potential. For short-term effects, an electrical accelerated condition was conducted for the 1 m specimens, which were submerged in a 5% sodium chloride solution by weight. Experimental studies were …
Investigation Of Photocathodic Corrosion Protection Of Zno/Zns Thin Film For Aisi 304 Stainless Steel In 3.5 Wt% Nacl Solution,
2025
Chulalongkorn University
Investigation Of Photocathodic Corrosion Protection Of Zno/Zns Thin Film For Aisi 304 Stainless Steel In 3.5 Wt% Nacl Solution, Soravid Veerapong, Naw Blessing Oo, Boossayamas Dachbumroong, Parichart Chaum, Thanate Na Wichean, Oratai Jongprateep, Naray Pewnim, Gasidit Panomsuwan, Ratchatee Techapiesancharoenkij
Journal of Metals, Materials and Minerals
Photocathodic protection is an alternative cathodic protection technique to protect metals by photo-generated electrons from a coupled semiconductor film under solar light. In this report, ZnO nanorods and heterostructure ZnO/ZnS nanorod films on FTO substrates were studied for their photocathodic protection for 304 stainless steels (304 SS) in a 3.5 wt% NaCl solution. The ZnO and ZnO/ZnS nanorods were fabricated on FTO substrates by spray pyrolysis and hydrothermal processes. The photocathodic performances of the ZnO and ZnO/ZnS photoanodes coupled with 304 SS samples were examined by Open-Circuit Potential (OCP), polarization curve analysis, and electrochemical impedance spectra (EIS). The ZnO/ZnS photoanodes …
Investigation Into Parameters Affecting The Synthesis Of Hybrid Gold Nanoparticle/ Nitrogen-Doped Carbon Dot Colloids,
2025
Chulalongkorn University
Investigation Into Parameters Affecting The Synthesis Of Hybrid Gold Nanoparticle/ Nitrogen-Doped Carbon Dot Colloids, Thammika Srisaman, Anyarat Watthanaphanit
Journal of Metals, Materials and Minerals
This study reports a two-step synthesis method for producing hybrid nanoparticles composed of gold nanoparticles (AuNPs) and nitrogen-doped carbon dots (CDs). Initially, we employed hydrothermal synthesis to fabricate CDs derived from mangosteen peel extract, which exhibits green light emission. Subsequently, the hybrid AuNPs/CDs were synthesized by inducing plasma in a solution containing CDs and a gold precursor, namely gold(III) chloride trihydrate. Our primary aim was to investigate the key parameters influencing the synthesis process. We assessed the colloidal properties of the AuNPs/ CDs by introducing a stabilizer, specifically sodium alginate, and examined how factors such as the presence of sodium …
Arginine-Modified Surface Coffee Grounds Activated Carbon For Pb2+ Adsorption: Kinetic, Isotherm And Thermodynamic Studies,
2025
Chulalongkorn University
Arginine-Modified Surface Coffee Grounds Activated Carbon For Pb2+ Adsorption: Kinetic, Isotherm And Thermodynamic Studies, Jarawee Chupirom, Sirikorn Khaophong, Nopporn Hemyakorn, Sonchai Intachai, Panita Kongsune
Journal of Metals, Materials and Minerals
This research focuses on enhancing the value of coffee waste by converting it into activated carbon for removing Pb²⁺ ions from contaminated water. Coffee grounds were activated with KOH and carbonized at 600°C for 4 h to produce activated carbon (CGAC), then modified with arginine via hydrothermal treatment at 120°C for 48 h to create Arg-CGAC. The adsorbents' chemical and physical properties were analyzed using SEM, FT-IR, BET, and pHpzc methods. Batch experiments revealed that Arg-CGAC exhibited superior Pb2+ adsorption (223.10 mg∙g‒1) compared to CGAC (119.23 mg∙g‒1) under optimal conditions. Isotherm analysis showed stronger adsorbate-adsorbent interactions and a more endothermic …
Enhancement Of Cell Viability Of The (Ba,Ca)(Zr,Ti)O And Hydroxyapatite Composites For Bone-Repair Applications,
2025
Chulalongkorn University
Enhancement Of Cell Viability Of The (Ba,Ca)(Zr,Ti)O And Hydroxyapatite Composites For Bone-Repair Applications, Jirapa Tangsritrakul, Manita Boonchoo, Piyanan Boonphayak, Paweena Uppanan, Pakkanun Kaewkong
Journal of Metals, Materials and Minerals
In this work, the influence of hydroxyapatite (HA) addition to the calcium/zirconium-doped barium titanate (BCZT) piezoceramic was investigated to evaluate its potential for bone-repair applications. The relationship between the physical, electrical, and biological properties of the (100-x)BCZT-(x)HA composite was observed via various techniques. The HA powder was synthesized via precipitation method, whereas the BCZT powder was produced by solid-state reaction to prepare the (100-x)BCZT-(x)HA composites, where x = 0 wt% to 50 wt%. The results showed that the dielectric, ferroelectric, and piezoelectric properties of the (100-x)BCZT-(x)HA composites decreased dramatically as introducing HA into BCZT due to the occurrence of secondary …
Structural And Dynamic Analysis Of Tapered Mast Bladeless Wind Turbines Using Fea And Cfd For Renewable Energy Generation,
2025
Chulalongkorn University
Structural And Dynamic Analysis Of Tapered Mast Bladeless Wind Turbines Using Fea And Cfd For Renewable Energy Generation, A. Pradeep, Raman Kumar, P. S. Satheesh Kumar, Nagaraj Patil, Vijayakumar Sivasundar, P. Vijaya Kumar, Selvaraj Manickam, Debasish Shit
Journal of Metals, Materials and Minerals
The present analysis investigates the possibility of using a tapered mast profile for bladeless wind turbines (BWTs) to enhance the function of extracting wind energy through the phenomenon of vortex-induced vibrations. Conventional HAWTs which remain the most efficient are however, costly in maintenance, mechanically complicated and rather unfavourable to the environment. To overcome these challenges a prototype BWT with a 0.6 m tapered mast was developed for the currents using mild steel and hollow square steel sections. Wind tunnels were also used to compare stress distribution, structural deformation and vane vortex shedding for the building at different wind speeds. The …
Analyse The Mechanical Property Optimization For Fdm/3d-Printed Polycarbonate Using Taguchi And Topsis Techniques,
2025
Chulalongkorn University
Analyse The Mechanical Property Optimization For Fdm/3d-Printed Polycarbonate Using Taguchi And Topsis Techniques, N. Srinivasa Rao, Raman Kumar, N. Kavitha, Ramachandran T., Hari Prasadarao Pydi, Aman Shankhyan, Ram Subbiah, Vikasdeep Singh Mann
Journal of Metals, Materials and Minerals
Fused Deposition Modeling is 3D printing techniques which chiefly appreciated for prototypes. This manufacturing process works by extrusion of thermoplastic materials to make the three-dimensional objects. In this work, we pursued to identify the FDM parameters to increase mechanical properties, specifically ultimate tensile strength (UTS) and compressive strength (CMS). Polycarbonate was chosen to create the test samples because of the best thermal and mechanical properties, which was the increasing manufacturing applications of 3D printing. Nine experiments were conducted to verify the interaction of the considered parameters, namely infill rate (IR), printing speed (PS), and film height (FH). The combined use …
Low-Cost High Performance Sustainable Triboelectric Nanogenerator Based On Laboratory Waste,
2025
Chulalongkorn University
Low-Cost High Performance Sustainable Triboelectric Nanogenerator Based On Laboratory Waste, Archana Panda, Kunal Kumar Das, Kushal Ruthvik Kaja, Venkataramana Gandi, Sunit Gourav Mohanty, Basanta Kumar Panigrahi
Journal of Metals, Materials and Minerals
The production of waste materials in laboratories is an unavoidable consequence of diverse experiments and activities. These materials can range from chemicals, solvents, and biological samples to electronic components, glassware, and plastics. Typically, this waste is classified into hazardous and non-hazardous categories, requiring careful disposal to avoid environmental and health risks. These can be repurposed for energy harvesting methods, such as using polymers in triboelectric nanogenerators (TENGs) or recycling metallic waste for electrodes. This approach reduces waste while advancing sustainable energy solutions. This technique demonstrates remarkable efficiency in utilizing diverse waste materials to transform various forms of mechanical energy into …
Efficacy Of Bifeo3 And Bi4ti3o12 Towards Photocatalytic Degradation Of Mg And Mb Dyes: A Comparative Study Under Solar Irradiation,
2025
Chulalongkorn University
Efficacy Of Bifeo3 And Bi4ti3o12 Towards Photocatalytic Degradation Of Mg And Mb Dyes: A Comparative Study Under Solar Irradiation, Rasmirekha -, Rishabh Kamal, Debapriya -, Suresh Kumar Dash
Journal of Metals, Materials and Minerals
Bismuth-based perovskite material has been used as promising photocatalysts for photo catalytic degradation of toxic dyes with tailored crystallites and fine-tuned band gap for superior activity. BiFeO3 and Bi4Ti3O12 were synthesized by a simple sol-gel method and their crystal structure, morphology, and optical property were characterized by XRD, SEM, TEM, FTIR, EDS and UV–DRS. The XRD pattern exhibits the formation of rhombohedral and orthorhombic phase of bismuth ferrite and bismuth titanate. The study confirms the formation of non-uniform BiFeO3 and Bi4Ti3O12 nanoparticles with uniform particle distribution, with band gap energy (Eg) of 2.2 eV and 2.9 eV, respectively, from UV-DRS …
Synergistic Effects Of Ti3c2tx Mxene On The Structural And Dielectric Properties Of Blend-Based Dielectrics,
2025
Chulalongkorn University
Synergistic Effects Of Ti3c2tx Mxene On The Structural And Dielectric Properties Of Blend-Based Dielectrics, Nitesh Kumar Nath, Rajanikanta Parida, Bichitra Nanda Parida, Nimai C. Nayak
Journal of Metals, Materials and Minerals
The PVDF/PMMA-Ti₃C₂Tx MXene composite (PMC) films are processed via the solution casting method. The various phases (α, β) of PVDF have been identified through analysis using an X-ray diffractometer and Fourier transform infrared spectroscopy instruments. The maximum percentage β phase (%) obtained was 73.15%, which corresponds to a 10.0 wt% composite film. The structural analysis revealed that the Ti3C2Tx nanoparticles are immiscibly distributed throughout the blend matrix, allowing the electrical conductivity and dielectric constant values to noticeably increase at constant frequency. The highest dielectric loss of 0.077 and the highest dielectric constant (εr) of 191.5 …
The Effect Of Fe-Nimnmo High Entropy Alloy Electrode On Enhancing The Weldability And Mechanical Properties Of Railway Steel 900a,
2025
Chulalongkorn University
The Effect Of Fe-Nimnmo High Entropy Alloy Electrode On Enhancing The Weldability And Mechanical Properties Of Railway Steel 900a, Sarawut Chaowakarnkool, Kanokwan Uttarasak, Sittipong Jaipayuk, Narin Jantaping, Man Tuiprae
Journal of Metals, Materials and Minerals
The rail transport system is essential for moving passengers and heavy goods over long distances, with steel 900A being a common material used for rail tracks in Thailand. Prolonged exposure to heavy loads and variable environmental conditions can lead to rail track damage known as "engine burn”, which results from friction between the train’s wheels and the rail. The flux-cored arc welding (FCAW) process is employed to repair these burns due to its use of readily available electrode wires and the efficiency of the repair. However, welding high-carbon steel like rail steel 900A poses challenges, such as a tendency to …
Review On Surface Engineering Of Nmc For High Performance Of Lithium-Ion Batteries,
2025
Chulalongkorn University
Review On Surface Engineering Of Nmc For High Performance Of Lithium-Ion Batteries, Pongsakorn Kantichaimongkol, Thanyalux Wanotayan, Jiaqian Qin
Journal of Metals, Materials and Minerals
The lithium-ion battery stands as a highly promising energy storage system. Among its key components, the cathode material—particularly lithium nickel manganese cobalt oxide (LiNiMnCoO₂), or NMC—is of great importance due to its high specific capacity and cost-effectiveness. Despite its advantages, NMC faces certain challenges, with limited cycle performance being one of the most critical issues. To address this issue, extensive research has been dedicated to surface modification strategies for NMC materials. Studies have identified two primary approaches, doping and coating, both of which have proven effective in enhancing the material's long-term stability. This work systematically examines, categorizes, and compares recent …
The Influence Of Aluminium Dross Residue And Coal Fly Ash On The Properties Of Geopolymers,
2025
Chulalongkorn University
The Influence Of Aluminium Dross Residue And Coal Fly Ash On The Properties Of Geopolymers, Haswanee Phungpha, Pitak Laoratanakul, Benya Cherdhirunkorn
Journal of Metals, Materials and Minerals
In this research, aluminium dross residue (AD) and coal fly ash (FA) were used for the production of geopolymers. The illegal dumping of AD and the high cost for AD waste disposal have been problems for long time in Thailand. Therefore, the feasibility of using AD (0 wt% to 100 wt%) in the geopolymer production had been carried out to find the alternative way to resolve these problems. The alkaline solution of NaOH 7 M and Na2SiO3 with the ratio of 1:3 was used for the geopolymerization reaction. It was found that the addition of AD caused the ammonia gas …
Tin Oxide Nanoparticle Extraction From Waste Solder Dross Via Low-Temperature Hydrometallurgical Process,
2025
Chulalongkorn University
Tin Oxide Nanoparticle Extraction From Waste Solder Dross Via Low-Temperature Hydrometallurgical Process, Tanongsak Yingnakorn, Sirunya Somla, Thanapon Chandakhiaw, Ethan Cheung, Sakhob Khumkoa
Journal of Metals, Materials and Minerals
This study proposes a hydrometallurgical approach to valorising industrial waste by producing SnO2 nanoparticles (NPs) from waste solder dross obtained by skimming off of tin solder baths from electronic dipping processes. The process involves leaching the dross with aqueous hydrochloric acid solution and hydrogen peroxide, followed by precipitation with ammonium hydroxide and purification with aqueous nitric acid solution. The optimised leaching conditions were determined to be 4 mol∙ L‒1 HCl, 11% v/v H2O2, 25℃, and a leaching time of 15 min. SnO2 NPs were successfully precipitated at pH 4 using 25% v/v NH4OH and purified with 1 mol∙ L‒1 HNO3. …
Investigation Of Pressure And Temperature Distributions In Aerofoils Using Cfd Simulation,
2025
Chulalongkorn University
Investigation Of Pressure And Temperature Distributions In Aerofoils Using Cfd Simulation, Ramesh Krishnan L., Jasgurpreet Singh Chohan, S. Vijayakumar, N. Beemkumar, Sriram Desikan, V. Nagabhushana Rao, M.Naga Swapna Sri, Mayank Kundlas
Journal of Metals, Materials and Minerals
Most aircraft derive the design of their wings, fins, and horizontal stabilizers from this construction approach, incorporating curved surfaces to enhance the lift-to-drag ratio during flight. Over the past decade, Computational Fluid Dynamics (CFD) has become the leading tool for designing components and processes involving fluid or gas movement across industries such as aviation, automotive, and manufacturing. This study examines the aerodynamic characteristics—including pressure, density, and temperature distribution, as well as lift and drag forces—of two different angles of attack based on the M13 and Eppler 1233 airfoils. The analysis considers an airfoil with varying chord thickness while maintaining a …
Photocatalytic Behaviour Of (Biybo3)0.5-(Batio3)0.5,
2025
Chulalongkorn University
Photocatalytic Behaviour Of (Biybo3)0.5-(Batio3)0.5, Yasaswi Priyadarshini Samal, Subhalaxmi Patra, Tapan Das, Minakshi Padhy
Journal of Metals, Materials and Minerals
Different organic compounds like dyes and pharmaceutical contaminants pollute a large amount of water which can increase the chemical oxygen demand in water bodies. The photodegradation of dyes has been widely studied using TiO2-based nanomaterials, which are typical photocatalysts. TiO2 is highly effective in reducing pollutants when exposed to UV light and does not cause secondary pollution. However, TiO2 is only functional when exposed to UV light, which is not ideal for real-world use. This drawback of TiO2 pulls the research towards modified photocatalysts for better yield. In this study, the (BiYbO3)0.5 - (BaTiO3)0.5 material was formulated by solid state …
Synergistic Effects Of Co-Ni Nanoalloys On Sio2@Tio2: A Novel Approach To Photocatalytic Tetracycline Degradation,
2025
Chulalongkorn University
Synergistic Effects Of Co-Ni Nanoalloys On Sio2@Tio2: A Novel Approach To Photocatalytic Tetracycline Degradation, Pratyush Kumar Sahu, Alaka Rath, Aslisha Champati, Ashish Madual, Pravat Manjari Mishra, Abanti Pradhan, Brundabana Naik
Journal of Metals, Materials and Minerals
To develop a cost-effective alternative to noble metal catalysts for photocatalysis, we synthesized a series of bimetallic Co-Ni nanoalloys on core-shelled SiO2@TiO2 nanostructures via a chemical reduction approach. The research demonstrates the photocatalytic behaviour of the Co-Ni alloy-enhanced SiO2@TiO2 (ST-Co, Ni) hybrid nanocatalyst, focusing on its crystalline structures, morphological shapes, chemical conditions, and optical properties, utilizing techniques such as X-ray diffraction, field emission scanning electron microscopy, UV-visible diffuse reflectance spectroscopy, photoluminescence spectroscopy, transmission electron microscope, and electrochemical analysis. The catalyst was evaluated for its effectiveness in degrading tetracycline, an overused antibiotic that persists in aquatic environments and is known for …
Studies Of Structural, Microstructural, Dielectric, And Electrical Characterization Of Binaznmoo6 Double Perovskite,
2025
Chulalongkorn University
Studies Of Structural, Microstructural, Dielectric, And Electrical Characterization Of Binaznmoo6 Double Perovskite, Swati Panda, Supriya Barik, Ritu Purna Sahu, Adwit Prasad Sahu, S. Mishra, S. K. Parida
Journal of Metals, Materials and Minerals
This study investigates the structural, microstructural, dielectric, and electrical properties of BiNaZnMoO₆ (BNZM) ceramic synthesized using a conventional solid-state reaction method. Preliminary structural analysis using X-ray diffraction (XRD) suggests orthorhombic crystal symmetry. Scanning electron microscopy (SEM) micrographs reveal a uniform distribution of well-grown grains with well-defined grain boundaries, which may contribute to the enhanced dielectric properties. Energy dispersive X-ray spectroscopy (EDX) analysis confirms the presence of all constituent elements Bi, Na, Zn, Mo, and O in the studied sample. Dielectric spectra analysis as a function of frequency and temperature indicates the formation of high-quality dielectric materials, evidenced by a high …
