bluuebunny/crossref_metadata_2025_split huggingface dataset:
Behavior of Ceramic Thermal Spray Coatings under Plasma Exposure
Authors: Yokota H. , Inaba M. 
Published: March 2024

Abstract
This study investigates plasma erosion mechanisms in alumina and yttria coatings produced by air plasma spraying. Plasma exposure tests were conducted in ICP etchers using CF4, Ar, and O2 as process gases. Etching rates were calculated based on height differences between masked and unmasked areas and coating cross-sections, surface morphologies, and phase distributions were analyzed. In the Al2O3 layers, erosion increased with increasing CF4 concentration and fluoridation of the coating surface was confirmed, suggesting that chemical erosion is the dominant mechanism. Although fluoridation occurred on Y2O3 surfaces as well, the amount of erosion in CF4 was the same as in the Ar environment. It is thus assumed that the fluoride formed on Y2O3 surfaces is very stable and that physical erosion due to ion sputtering is the dominant mechanism.
Analysis of Liquid Feedstock Behavior in High Velocity Suspension Flame Spraying for the Development of Nanostructured Coatings
Authors: Gozali Ebrahim , Kamnis Spyros , Gu Sai 
Published: March 2024

Abstract
The aim of this work is to obtain a better understanding of high-velocity suspension flame spraying though detailed modeling and analysis. A numerical model was developed and is used to analyze the effects of process parameters including droplet size, injection velocity, secondary droplet breakup, solution evaporation and combustion, mass flow rate, flame temperature, and the location of the injection point. The results show that initial injection parameters play an important role in controlling the process and should be specified to minimize cooling effects and promote droplet evaporation inside the combustion chamber. It was also found that the ideal location for the injection point is inside the chamber, which in practice, can be achieved by slightly modifying gun geometry.
Wear Performance of Thermally Sprayed and Welded Coatings Using Conventional and Nanostructured Materials
Authors: Lima C.R.C. , Bette B.V. , Camargo F. , Fals H.C. , Ferraresi V.A. 
Published: March 2024

Abstract
The main objective of this study is to compare the wear resistance of coatings obtained by gas metal arc (GMA) welding, wire arc spraying, and high-velocity oxyfuel (HVOF) spraying. Tungsten and chromium carbide (WC-Co and CrC-NiCr), iron alloy (Vecalloy B and 140-MXC), and 420 stainless steel coatings were deposited on low carbon steel substrates by the appropriate method. The coatings were examined by optical and scanning electron microscopy, showing no signs of spallation nor relevant level of defects. WC-Co coatings obtained by HVOF spraying exhibited the best abrasive wear resistance. Nanostructured Fe-alloy coatings applied by wire arc spraying performed almost 50% better than HVOF sprayed CrC and only 15% worse than WC-17Co. The erosion resistance of the two WC-Co coatings was very close, although WC-12Co was slightly better possibly due to its higher microhardness, lower porosity, and higher residual compressive stresses.
Fabrication of Dense Ceramic Coatings by Using HVOF Spraying
Authors: Kim Jin-Hong , Seong Byeong-Geun , Kim Hyung-Jun 
Published: March 2024

Abstract
In this study, dense ceramic coatings are fabricated by HVOF spraying using Al2O3-TiO2 powder. To evaluate the effects of the feedstock material and spray equipment, conventional and nanostructured powders were sprayed using different HVOF systems. Coating microstructure, bond strength, hardness, porosity, and wear resistance were measured and the results are compared with conventional plasma-sprayed coatings.
Characterization of the Flow Regimes in the Jet Spray for Different Twin-Wire Arc Spraying Nozzles by Adapting the Background Oriented Schlieren Technique
Authors: Tillmann W. , Mohamed A. , Nassir A. , Hagen L. , Rademacher H.G. 
Published: March 2024

Abstract
The rapid pace of advancement in thermal spraying is in large part due to the availability of diagnostic tools that are used to measure process variables such as particle temperature, particle trajectories, and plume geometry. The work presented here deals with the adaptation of an imaging method that can be used to visualize, quantify, and distinguish between laminar, transitional, and turbulent flow regimes. The method is based on schlieren photography and an image processing procedure that extracts the density field of a flow relative to a background image. In this study, the promising new method known as background-oriented schlieren (BOS) is used to evaluate different nozzle designs for twin-wire arc spraying. The results are presented and compared with CFD simulations, conventional schlieren images, and color photographs of the spray plume.
Plasma Spray-Physical Vapor Deposition of La1-xSrxCoyFe1-yO3-δ Thin Film Oxygen Transport Membrane on Porous Metallic Supports
Authors: Jarligo M.O. , Mauer G. , Bram M. , Baumann S. , Vaßen R. 
Published: March 2024

Abstract
In this work, plasma spray-physical vapor deposition (PS-PVD) is used to create oxygen transport membranes, consisting of gastight LaSrCoFeO thin films on porous MCrAlY metallic supports. During spraying, a protective layer of alumina forms at the interface between the membrane and support preventing interdiffusion. Surface roughness of the metallic support is shown to play a critical role in limiting microstructural defects. Phase composition, growth rate, and microstructure buildup are also investigated along with the annealing behavior of LSCF films at different temperatures. Initial results are promising and further improvements are expected by optimizing process parameters.
Adhesion/Cohesion Strength of Plasma Sprayed Ceramic Coatings by Scratch Testing On Cross-Section
Authors: Byon Eungsun , Lee Soo-Wohn , Kitamura Junya , Holmberg Kenneth 
Published: March 2024

Abstract
This work investigates the reliability and reproducibility of scratch testing for YSZ and TiO2 coatings deposited on NiCr bondcoats by plasma spraying. Scratch tests were conducted on cross-sections of the spray coatings. An image of the scratched area was taken after testing using an optical microscope in order to determine failure mode. With a statistical evaluation, the adhesion and cohesion strength were determined. The results show that cross-sectional scratch testing is effective for estimating the adhesion and cohesion strength of plasma spray coatings.
Influence of Topcoat-Bondcoat Interface Roughness on Stresses and Lifetime in Thermal Barrier Coatings
Authors: Gupta M. , Skogsberg K. , Nylén P. 
Published: March 2024

Abstract
In previous work, it was observed that atmospheric plasma sprayed bond coats perform better than their HVOF counterparts, which is contrary to current literature data. The objective of this work is to understand the observed difference with the aid of finite-element modeling. Different thermally grown oxide layer thicknesses and surface topographies are evaluated and the modeling results are compared with current theories based on simplified sinusoidal profiles. It is shown that modeling can be used as an effective tool to understand the stress behavior in TBCs with different roughness profiles.
New Method for Carbon Nanofibers-Metal Powder Formation and Their Use in Thermal Spray Coatings
Authors: Vidal D.R. , Cano I.G. , Fernández J. , Guilemany J.M. 
Published: March 2024

Abstract
This study evaluates a method for producing carbon fiber composite feedstocks suitable for cold gas spraying. Powders consisting of Al-Si particles and carbon nanofibers were attrition milled at 16.5 Hz and 27.5 Hz for up to 12 h at room and cryogenic temperature. Particle shape and size were examined every hour and carbon fiber integration in the Al-Si matrix was assessed. Detailed results are presented and discussed. In all cases, cryomilled powders had smoother surfaces.
Characterization of WC Particle-Reinforced In-Situ FeAl Intermetallic Matrix Composite Coating by Cold Spraying
Authors: Wang H.-T. , Ji G.-C. , Wang R.-Y. 
Published: March 2024

Abstract
The aim of this work is to fabricate a particle-reinforced FeAl composite coating by cold spraying. Fe, Al, and WC powders were placed in a ball mill and mechanically alloyed for up to 36 h in order to obtain a nanostructured Fe(Al) solid solution reinforced with a high volume fraction of WC particles. The powder was examined and then cold sprayed on stainless steel substrates using N2 as the accelerating gas. The as-sprayed deposits exhibited rough surface morphology and dense cross-sectional microstructure with dual-scale WC dispersoids distributed uniformly in the Fe(Al) matrix. The coatings were annealed at 650 °C and subsequently reexamined. In-situ phase transformation from the solid solution to an intermetallic compound occurred after the post-spray treatment along with an improvement in microstructure.
Effect of SiC Particle Size and Volume Fraction on the Microstructure and Properties of Cold-Sprayed AZ91D-SiC Composite Coatings
Authors: Suo X.-K. , Yu M. , Planche M.-P. , Liao H.-L. , Suo Q.-L. 
Published: March 2024

Abstract
Magnesium alloy AZ91D-SiC composite coatings were fabricated by cold spraying to study the effects of SiC particle size and volume fraction on microstructure and mechanical properties. The results show that coatings with large SiC particles have higher microhardness and bonding strength. Mechanically blended powders with fine SiC particles, on the other hand, are difficult to deposit. SiC volume fractions in the starting powders were 15, 30, 45, and 60 vol%, resulting in coatings with SiC volume fractions of 19, 27, 37, and 51 vol%. Based on test results, coating hardness and bonding strength increase with increasing volume fraction of SiC particles.
A numerical study of the multicriteria parametric optimization of the displacement and weight of a two-connected conical shell of minimal surface under thermal and power loading
Authors: Ivanchenko Gryhorii , Koshevyi Oleksandr , Koshevyi Oleksandr 
Published: March 2024

Various methods and approaches are used to solve the problem of optimal design. Problems of this type are used for the optimal design of spatial coverings, which in modern architecture are progressive structures that are of interest to the whole world. Spatial coatings allow to give the building architectural expressiveness, cover large spans and combine load-bearing and enclosing functions.
The hulls of minimal surfaces are the hulls of negative Gaussian curvature. In general, the geometry of minimal surfaces cannot be described analytically. To solve this problem, which is associated with solving the differential equation that describes the minimal surface in general, under appropriate boundary conditions, one has to use methods of numerical analysis. This approach allows us to build a point frame of the shell, which is a matrix of discrete solutions of functions that searches for a given minimum surface. In view of this, its geometric characteristics can be obtained only in numerical form.
The basic relations of the linear theory of thin elastic shells of minimal surface are highlighted in the numerical study of parametric optimization. The mathematical justifications of how the external load is perceived and the process of creating the stress-strain state of the shells of minimal surfaces are highlighted.
For the numerical implementation of the multicriteria parametric optimization of a double-connected conical shell of minimal surface, a finite element model was built from plate finite elements in the amount of 4824 pieces and 4896 nodes. The perimeter is rigidly clamped to the ground disk. The thermal force load is set, which consists of a combination of static and temperature loads.
The developed methodology shows quite good results that coincide with the works of other authors and makes it possible to use two types of optimization for one research object simultaneously. The first stage is shape optimization, and the second stage is multicriteria parametric optimization.
This methodology makes it possible to perform optimization processes in an automated mode, which is an important applied task for construction and applied mechanics.
Hubungan antara Tinggi Pundak, Panjang Badan dan Lingkar Dada dengan Bobot Badan pada Domba Ekor Tipis
Authors: Hadiyanto Wawan , Widyani Retno , Sumardjo Djodjo 
Published: March 2024

ABSTRAKPenelitian bertujuan untuk mengetahui hubungan antara bobot badan domba ekor tipis dengan tinggi pundak, panjang badan dan lingkar dada serta mengetahui besar keeratan antara bobot badan domba ekor tipis dengan tinggi pundak, panjang badan dan lingkar dada tersebut. Penelitian dilaksanakan di Pasar Hewan Ciledug Kecamatan Pabuaran Kabupaten Cirebon selama satu minggu, yaitu 1 â€“ 7 Desember 2008. Ternak yang diamati adalah 50 ekor domba ekor tipis jantan dan 50 ekor domba ekor tipis betina yang berumur 1,0 â€“ 1,5 tahun. Penelitian dilaksanakan dengan metode observasi dan pengamatan terhadap ternak domba ekor tipis yang memenuhi kriteria sesuai tujuan penelitian. Data utama yang diamati adalah jenis kelamin, umur domba, berat badan ( BB), Tinggi Pundak (TP), Panjang Badan (PB) dan Lingkar Dada (LD). Data yang diperoleh dianalisis dengan metode korelasi dan regresi. Lingkar dada, tinggi pundak dan panjang badan sebagai variable bebas, yakni X1, X2 dan X3, sedangkan berat badan sebagai variable tak bebas (Y). Hasil penelitian menunjukan bahwa antara berat badan memiliki hubungan yang erat dengan lingkar dada, tinggi pundak dan panjang badan domba ekor tipis. Pada domba ekor tipis jantan hubungan tersebut ditunjukkan dengan persamaan regresi Y = - 41,92 + 0,558 Â Â + 0,254 Â + 0,224 Â dan koefesien korelasi R = 0,927, sedangkan pada domba ekor tipis betina hubungan tersebut ditunjukan dengan persamaan regresi Y = -39,032 + 0,662 Â + 0,223 Â + 0,205 Â dan koefisien korelasi R = 0,910. Secara mandiri lingkar dada memiliki kolerasi yang paling kuat dengan berat badan. Pada domba ekor tipis jantan memiliki korelasi 0,890 dengan persamaan Y = -31,589 + 0,829 X dan pada domba ekor tipis betina memilki koefisien korelasi 0,900 dengan persamaan Y = -34,057 + 0,857 X.Kata Kunci : Morfologi, Bobot Badan Domba, Domba Ekor Tipis
Mining & Metals + Internet of Things: Industry opportunities and innovation
Authors: Kim Chris 
Published: March 2024

<p>The mining industry is as vital to today’s global economy as ever before, yet it is at a crossroad. It is an industry that is currently combating multiple adverse global trends such as falling commodity prices, a slowing global economy and skilled labour shortages. In an September 2014 interview for this report, Glenn Ives, Americas Mining Lead and Chairman of Deloitte Canada, observed that while the industry over the last year or two had “gone down—there is a realization that we do need minerals to keep our economies going.” The shift toward technology will actually also increase our dependence on mining. The industry, for the most part, understands what must be done. “Mining innovation is moving ahead,” argues Ives. The World Economic Forum highlighted “automation of operations” as a top technological driver identified by global mining stakeholders.1 </p>
Transforming health: Ontario startups in decentralized and connected care
Authors: Kim Chris 
Published: March 2024

<p>Canada is one of the highest investors in health on a per capita basis, yet that investment has not necessarily translated into better health for Canadians. Canadians undoubtedly value their healthcare system, but understandably demand better return on their $211 billion investment. The current challenges facing the Canadian healthcare system are numerous, but can be generally grouped into two areas: 1) population-driven challenges, including the ubiquity of chronic conditions and our ever-increasing aging population, and 2) system-driven challenges, including increasing costs of labour in formal healthcare settings and the cost of adopting new medical technologies. </p>
<p>Part 1 of this series investigated two thrusts that are taking shape in Canada and around the world to mitigate the challenges described above. The first is an emphasis on decentralizing healthcare by moving care out of resource-intensive institutions (such as hospitals) and into other models of care delivery and even self-management in the home and community. The second focuses on building an integrated healthcare system that uses digital health technologies and processes that connect all parts of the healthcare delivery system, seamlessly, so that critical health information is available when and where it is needed. Introduction | 4 Market Intelligence (MI): What role do startups play in transforming healthcare? Zayna Khayat (ZK): Transforming healthcare requires innovation. Entrepreneurship underpins innovation. Key feeders of this innovation are new health ventures that are founded by entrepreneurs who are challenging the status quo. Entrepreneurship as a mindset is particularly salient in the health sector because we are witnessing the creative destruction of institutions that have been operating for more than 50 years. This report begins with an interview with Zayna Khayat, MaRS Health lead at MaRS Discovery District. It is followed by profiles of 10 Ontario digital health startups that are creating solutions for connectedness and enabling the shift of care from formal settings to the community.</p>
Security and privacy: Living in a vulnerable connected world
Authors: Kim Chris 
Published: March 2024

<p>A Raspberry Pi Model B+ Board costs $38.15 plus taxes and shipping. These credit card–size computers can be connected to a PC; they are designed for people who want to learn programming. The Raspberry Pi is also capable of interacting with the outside world (that is, the physical world) through a general-purpose input/output (GPIO), a pin that enables the board to be interfaced with sensors, motors and a plethora of other electronic devices. Why are we talking about Raspberry Pi? Because you could use one to prototype your next Internet of Things (IoT) project. </p>
UPAYA PENINGKATAN PERTUMBUHAN DAN PRODUKSI KACANG TANAH (Arachis hypogaea L.) PADA BEBERAPA DOSIS VERMIKOMPOS DAN FREKUENSI PEMBUMBUNAN
Authors: Farasmayuda  , Syamsul Bahri  , Boy Riza Juanda  
Published: March 2024

Penelitian ini bertujuan untuk mengetahui pertumbuhan dan produksi kacang tanah pada beberapa dosis vermikompos dan frekuensi pembumbunan. Penelitian ini dilaksanakan di Desa Paya Bili Dua, Kecamatan Birem Bayeun, Kabupaten Aceh Timur, Provinsi Aceh dengan ketinggian tempat ± 16 m di atas permukaan laut (dpl). Penelitian ini dilaksanakan selama 3 bulan yang dimulai dari bulan September 2022 sampai bulan Desember 2022. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) faktorial, yang terdiri dari 2 faktor yaitu: Faktor dosis vermikompos yang terdiri dari 4 taraf yaitu: K0 = Kontrol, K1 = 0,86 kg/plot, K2 = 1,40 kg/plot, K3 = 1,94 kg/plot, dan faktor frekuensi pembumbunan yang terdiri dari 3 taraf yaitu: P1 = 1 kali (umur 20 HST), P2 = 2 kali (umur 20 dan 35 HST), P3 = 3 kali (umur 20, 35 dan 50 HST). Parameter yang diamati dalam penelitian ini antara lain tinggi tanaman (cm), jumlah cabang (cabang), berat polong per tanaman/sampel (g), berat polong per plot/sampel (g) dan produksi per Ha (ton).
Eficacia de doxiciclina frente a doxiciclina-metrodinazol y drenador celular® en fase clínica aguda en perros con erliquia
Authors: Moncayo Paz José Luis , Villamarin Barragán Darwin Rafael 
Published: March 2024

Introducción. La Ehrlichiosis canina se define como una enfermedad hemoparasitaria causada por bacterias Gram negativas. Estas bacterias se dirigen a las células diana de los leucocitos, pertenecientes tanto al grupo de los granulocitos como a los agranulocitos. La enfermedad se transmite a los perros a través de garrapatas. En cuanto a la sintomatología que presentan los pacientes afectados por esta bacteria, se clasifica en leves, agudos y crónicos. Objetivo. Esté estudio tiene como objetivo el comparar el efecto de la doxiclina frente a doxiclina + metrodinazol + drenador celular en fase clínica agudas en perros con erliquia que asistieron a la Clínica Veterinaria JM. Metodología. Para el desarrollo de este artículo científico, se plantea el método de investigación experimental de Métodos transversales y técnicas de observación de leucogramas, signos clínicos de cada canino de la clínica para valores cualitativos, los instrumentos de investigación serán de forma comparativa y el universo de estudio corresponderá a 20 perros para el tratamiento 1 y 20 perros con tratamiento 2, se utilizaron estadística descriptiva para el tratamiento de los datos. Resultados. Se logró determinar que con el tratamiento 2 hubo 16 mascotas que obtuvieron resultados satisfactorios mientras que con el tratamiento 1 solo 10 mascotas obtuvieron buenos resultados. Conclusión. Tras la recopilación de datos, se considera válida dicha hipótesis, ya que los resultados estadísticos evidenciaron la mayor eficacia del tratamiento T2 en comparación con el tratamiento T1. Área de la ciencia: Medicina veterinaria, enfermedades infecciosas, medicina interna etc.
Pemanfaatan Data Hujan Global Untuk Mengevaluasi Rencana Pengembangan Komoditas Pertanian Prioritas Di Provinsi Papua Barat
Authors: Faisol Arif , Paga Bertha Ollin 
Published: March 2024

Provinsi Papua Barat merupakan salah satu wilayah yang ditetapkan sebagai Lokasi Kawasan Pertanian Nasional dengan komoditas prioritas padi, cabai, kako, kelapa sawit, bawang merah, pala, dan kelapa. Iklim merupakan parameter utama dalam pengembangan kawasan pertanian. Zona iklim Schmidt – Ferguson dan Oldeman merupakan zona iklim berbasis data hujan bulanan yang digunakan secara luas untuk perencanaan pertanian di Indonesia. Terbatasnya stasiun iklim di Provinsi Papua Barat dengan durasi pencatatan kurang dari 30 tahun menjadi kendala dalam melakukan analisis iklim. Climate Hazards Group Infrared Precipitation with Stations (CHIRPS) merupakan salah satu dataset hujan global berbasis penginderaan jauh yang memiliki durasi perekaman lebih dari 30 tahun. Penelitian ini bertujuan untuk memanfaatkan data CHIRPS, metode Schmidt – Ferguson, dan metode Oldeman untuk mengevaluasi rencana pengembangan komoditas pertanian prioritas di Provinsi Papua barat. Secara umum penelitian ini terdiri atas 3 (tiga) tahapan utama, yaitu; inventarisasi data, klasifikasi data hujan, dan evaluasi kesesuaian iklim. Hasil penelitian menunjukkan bahwa komoditas pertanian prioritas yang telah ditetapkan oleh pemerintah sesuai dengan kondisi iklim di Provinsi Papua Barat. Hanya komoditas bawang merah yang tidak sesuai dengan kondisi iklim di Provinsi Papua Barat. Oleh sebab itu kebijakan pengembangan komoditas pertanian prioritas di Provinsi Papua Barat dapat dijalankan dalam rangka menjaga ketahanan pangan serta pertumbuhan ekonomi di Indonesia.