bluuebunny/crossref_metadata_2025 huggingface dataset:
Berwisata Digital: Studi Etnografi Praktik Bermain Game Sebagai Ruang Wisata Virtual
Authors: Yuwono Ardian Indro , Dahana Abyzan Syahadin Bagja
Published: January 2023

Gim dengan genre dunia terbuka menawarkan pengalaman bermain baru yang memungkinkan gamer melakukan eksplorasi menyeluruh khususnya secara visual. Gamer tidak lagi memainkan gim untuk menyelesaikan misi dan tantangan, tetapi juga untuk mengeksplorasi dan menikmati perjalanan dalam dunia gim. Penelitian ini bertujuan menemukan pengalaman gamers saat mengeksplorasi dunia terbuka dalam gim dan memanfaatkan fitur photo mode. Metode pada penelitian ini menggunakan etnografi dalam kerangka cultural studies cetusan Saukko yang mengungkapkan pengalaman gamer selama mengeksplorasi dunia virtual dalam gim. Subjek penelitian merupakan para gamer yang memainkan gim dunia terbuka dengan judul “Ghost of Tsushima”, “Red Dead Redemption” dan “Spider man”. Penelitian ini berisi praktik berwisata virtual yang dilakukan gamer berdasar pada minat di dunia luring. Hasil penelitian ini mengungkapkan bahwa travelling merupakan bagian dari praktik berwisata para gamer, khususnya berpetualang dan mengabadikan momen dengan menggunakan fitur photo mode menjadi salah satu bentuk rekreasi alternatif, di saat aktivitas berwisata fisik tidak memungkinkan karena keterbatasan biaya, kesibukan serta keterbatasan kegiatan sosial lainnya. Kontribusi penelitian ini memberi kebaruan tentang fitur photo mode pada permainan gim video menjadi bentuk media komunikasi baru dalam praktik berwisata virtual.
Praktik Sosiokultural dalam Wacana Legenda dan Mitos “Tanah Mangir” Desa Mangir Bantul
Authors: Rajiyem Rajiyem , Setianto Widodo Agus
Published: January 2023

Masalah penelitian ini adalah relevansi legenda dan mitos dalam masyarakat modern serta pola pengkomunikasiannya di masyarakat. Tujuan penelitian untuk menemukan praktik sosiokultural dalam komunikasi wacana legenda dan mitos “Tanah Mangir” Desa Mangir Kabupaten Bantul. Metode penelitian menggunakan metode etnometodologi. Hasil penelitian wacana legenda dan mitos tanah Mangir terkait dengan cerita rakyat Ki Ageng Mangir Wanabaya. Praktik sosiokultural dalam pola pengkomunikasian diwariskan secara lintas generasi baik melalui cerita tutur di lingkungan keluarga, komunitas maupun abdi dalem keraton. Masyarakat Mangir sangat mempercayai mitos kesaktian Ki Ageng Mangir dan mitos tanah Mangir sebagai tanah perdikan yang bebas. Ki Ageng Mangir adalah sosok pribadi yang protagonis. Panembahan Senapati adalah sosok yang antagonis. Ki Ageng Mangir tewas akibat nafsu politik Panembahan Senapati untuk menguasai tanah Mangir melalui siasat politik apus karama. Relevansi sebagai bentuk ajaran moral, pengukuhan jati diri, pelestarian warisan leluhur, tradisi dan lingkungan alam. Fungsi mitos sebagai sarana pendidikan. Kontribusi penelitian memberikan pengayaan pengetahuan masyarakat terhadap khasanah kearifan lokal yang bersumber dari sejarah masa lalu, mengukuhkan jati diri masyarakat setempat, dan kebijakan dalam melestarikan dan memelihara tradisi dan warisan budaya.
Streaming Media Over The Top (OTT) di Masa Pandemi COVID-19
Authors: Prihantoro Edy , Handayani Asyifa Aulia
Published: January 2023

Aktivitas streaming film dan serial di Indonesia meningkat saat pandemi COVID-19. Hal ini menyebabkan penyedia layanan media Over The Top (OTT) khususnya pada kategori streaming audio video dituntut untuk lebih memperhatikan kebutuhan dan keinginan konsumen jika ingin tujuan perusahaan tercapai. Penelitian ini bertujuan untuk menguji variabel keterlibatan konsumen (X1), variabel kualitas pengalaman layanan (X2), dan variabel gaya hidup (X3) memiliki pengaruh terhadap variabel kesediaan berlangganan media OTT (Y) di masa pandemi COVID-19. Metode penelitian yang digunakan adalah kuantitatif dengan Teori Determinisme Teknologi. Populasi dalam penelitian ini adalah masyarakat Kota Jakarta yang menggunakan media OTT pada kategori streaming audio video yang jumlahnya tidak diketahui secara pasti dengan teknik pengambilan sampel terpilih 100 orang. Data yang digunakan untuk penelitian ini diperoleh dengan cara menyebarkan kuesioner secara online. Analisis data dilakukan dengan metode Partial Least Square (PLS) menggunakan software SmartPLS versi 3.0. Hasil penelitian menunjukkan bahwa masing-masing variabel memiliki pengaruh secara parsial ataupun simultan terhadap kesediaan berlangganan media OTT di masa pandemi COVID-19. Kontribusi penelitian ini memberi masukan kepada para penyedia media layanan OTT dan juga sebagai referensi bagi penelitian selanjutnya mengenai faktor-faktor yang dapat memengaruhi seseorang untuk berlangganan media OTT.
Optimalisasi Biaya Transportasi Produk UMKM Naturies Indonesia Dengan Metode Northwest Corner Dan Vogel’s Approximation
Authors: Yuliana Yuliana , Tasari Tasari , Setiyaningsih Anita , Munif Fika Aisyah , Putri Miftacha Febriani
Published: January 2023

Naturies Indonesia is one of the UMKM for spice drinks in Macanan, Klaten, Central Java which is developing. As one of the growing UMKM, Naturies Indonesia is experiencing problems related to the distribution of its products. Naturies Indonesia has incurred transportation costs of Rp.442,100.00 per week in distributing its products to 5 distributors (Kudus, Jakarta, Shopee, Bandung, and offline). Due to human resource constraints, Naturies Indonesia does not yet have a thorough plan to reduce shipping costs in allocating products from production sites to customers or distributors. Through this applied research, this research aims to find the optimization of product delivery costs. Data were collected through interviews and documentation, then analyzed using the Northwest Corner and Vogel's Approximation methods. Analysis using the Northwest Corner method found a shipping cost of IDR 431,600.00, while the Vogel's Approximation method found a shipping cost of IDR 427,900.00. The shipping costs found were actually lower than the financing that had been issued so far.
 Keyword: northwest cor, spice drinks, optimization of transportation, UMKM Naturies Indonesia, vogel’s approximation
Czy włoska praca się opłaca? Zatrudnienie wykwalifikowanych Polek we Włoszech na tle migracji polsko-włoskich
Authors: Kowalska Kamila
Published: January 2023

The book is the first attempt to outline the situation of qualified Polish women employed in the Italian job market after Poland joined the European Union in 2004. Against the background of contemporary and historic migrations from Poland to Italy, the author presents the results of unique qualitative and quantitative repeated research in which the Poles characterize their employment and its conditions, adopted strategies for development and the existing barriers in building a career.
Rodzinne uwarunkowania kreatywności
Authors: Klik Marcin , Cierpka Anna
Published: January 2023

The publication explores the influence of various family background aspects on the formation of the human creative attitude. The original reflection on the issue, based on the authors’ research, is preceded by the presentation of the current state of knowledge. The part of the book devoted to quality research uses the authors’ horizontal analysis modelled on methods employed in literary criticism. On the basis of the obtained results, interpreted in the light of selected psychological concepts, the authors propose an integrated model of interdependencies between the level of individual creativity, characteristics of the family system, parenting styles and the three types of creative identities (a family hero, a lone wanderer, a rebel).
Excitations of H2 by positron impact
Authors: Lino J L S
Published: January 2023

In this paper, we present a theoretical study of scattering cross sections for positron impact of electronic states of hydrogen molecule (H2) using the scaling Born positron (SBP) approach. Cross sections to low-lying electronic states, B1∑+u, C1Пu, B´1 ∑+u, and D1Пu are investigated. In an earlier theoretical effort [J.L.S.Lino, Rev. Mex. Fisica 62 (2016) 596], an application of the SBP approach for the X1∑+g - > B1∑+u electronic excitation of the H2 molecule, gave cross sections with reasonable qualitative agreement with experimental data [J.P.Sullivan et. al., Phys.Rev.Lett.87,073201 (2001)]. However, recent studies for the excitation of the B1∑+u state by positron impact showed that this electronic state still demand of a refined degree of description of the quality of the cross sections (Weiss et. al., Eur. Phys. J. D (2018) 72). The purpose of this work was to reexamine the B1∑+u state and verify the quality of the numerical convergence of SBP method and extend the investigation to other states. The possibility to estimate a indirect contribution of multichannel effects ( three states considering the ground X1, B1∑+u and E,F1∑+u state) are introduced within the SBP context. For the first time, integral cross sections to these new states using the SBP approach are reported. In the absence of the experimental data and theoretical developments, comparisons are made with analogous electron scattering.
Applications of the complex, double and dual numbers in Lagrangian mechanics
Authors: Torres del Castillo Gerardo Francisco , Capulín Tlaltecatl Luis Ángel
Published: January 2023

It is shown that in some examples of classical mechanics, the complex, double and dual numbers are useful in the search of symmetries of the equations of motion. As a byproduct, we obtain non-standard Lagrangians for the systems under consideration.
Structural and morphological study of Mn, Zn and Zr freeze-dried transition metal acetates
Authors: Oliveira de Souza A. , Da Silva Tupan L. F. , Thyago Jensen A. , Paesano Junior A.
Published: January 2023

Manganese (II) acetates tetrahydrate, zinc dihydrate and anhydrous zirconium, processed by freeze-drying, were heat-treated in free atmosphere at different temperatures and times, generating the main oxides of these metals. These acetates were structurally characterized by scanning electron microscopy (SEM), thermogravimetry (TG), differential scanning calorimetry (DSC) and, along with all the oxides generated, by X-ray diffraction (XRD). Calculations obtained from TG data showed that manganese acetate lost two waters after freeze-drying, also confirmed by X-ray data and that the same phenomenon may be occurring for zinc acetate. The results indicate that exothermic events occurred at lower temperatures for freeze-dried acetates, which may be related to the high surface area of the material, and consequent greater reactivity. The total decomposition temperatures of the acetates in the ZnO and ZrO2 semiconducting oxides and the manganese oxides Mn2O3 and Me3O4, with excellent crystallization, were obtained.
Asymmetry in particle transport in slightly non-homogeneously doped silicon layers in low injection regime and quasi-neutrality condition
Authors: Hernández Víctor , Vázquez Federico
Published: January 2023

In this work a 1D slightly doped n-type Silicon layer is considered. Irreversible thermodynamics transport equations are used to obtain the spatial particle distribution in isothermal stationary state. The excess particle transport is studied in low injection regime and quasineutrality condition. The material is subjected to Dirichlet-Neumann (N-D) conditions at the boundaries. We wonder if an asymmetry of the particle flux exists when the boundary conditions are inverted. We find that the asymmetry does exist and a rectification factor may reach the value 0.35. We conclude that particle flux rectification seems to be featuring the particle transport in slightly non-homogeneously doped semiconductor when the excess hole concentration is smaller than the equilibrium hole concentration
Urbanismo(s) táctico(s) en Lima-Perú, 2001-2021. Otras formas de producción del espacio público
Authors: Collantes Ezequiel , Vera Javier
Published: January 2023

En las últimas décadas han proliferado en Lima muchos proyectos urbanos que podríamos considerar como urbanismo táctico (UT). La heterogeneidad de los proyectos de UT es lo que motivó este artículo. La investigación realizó un análisis crítico comparado de algunas de las experiencias más significativas llevadas a cabo en Lima. Se seleccionaron como casos de estudio un total de nueve proyectos y se analizaron en base a tres dimensiones principales: la espacial, la temporal y la cívica. Los resultados indican que formalmente todos los proyectos son similares, sin embargo, se evidencian grandes diferencias en las tres dimensiones analizadas, sobre todo en la cívica. La línea del tiempo indica que los proyectos de UT han ido abandonando cada vez más aspectos como la visión de base, el involucramiento de actores locales y el desarrollo del capital social, adscritos a la dimensión cívica. La investigación muestra que esto está vinculado a una progresiva institucionalización del UT. En este proceso, el UT deja de ser un acto cívico de reacción, resistencia y reclamo ante el urbanismo impuesto.
High Rate Deposition in Cold Spray
Authors: Ozdemir Ozan C. , Muftu Sinan , Randaccio Lauren , Nardi Aaron T. , Champagne Victor K. , Widener Christian A.
Published: January 2023

Industrialization of cold spray brings along the questions of cost and time efficiency of various spray procedures. In this work, high rate deposition of tantalum was studied by producing coating specimens where the powder to helium mass flow rate varied from 5% to 14%. Quasi-1D fluid simulations predict a minimal effect of increased powder stream loading on particle impact velocity and temperature over those ranges, but the cost varies substantially. The experimental specimens, examined by using optical micrographs, porosity measurements, and hardness tests, show no discernable differences in the deposited samples. The increased stream loading rate, however, helped reduce the time required for processing the same amount of tantalum by a factor of three using identical helium spray conditions.
Powder Jet Variations Using Low Pressure Cold Spraying—For an Improvement of the Spraying Field
Authors: Koithara Libin Lalu , Raoelison Rija Nirina , Costil Sophie , Planche Marie-Pierre
Published: January 2023

This study investigates the in-flight behavior of particles during cold spraying by means of high-speed shadowgraph photography using a laser imaging system. It also characterizes the particle jet outside the nozzle for different powder sizes (<10 µm to 155 µm) and densities (copper, aluminum). Observations of the jet reveal two low-pressure cold spray flow regimes, one stable, the other unstable, the effect and control of which are discussed.
Interfacial Strength of Plasma-Sprayed Hydroxyapatite Coatings
Authors: Ohki Motofumi
Published: January 2023

Tensile and shear adhesion strength tests were carried out to evaluate interfacial strength between hydroxyapatite (HA) coatings and titanium alloy substrates that that had been anodized or pre or post heat treated. Tensile and shear adhesion strength were both found to be influenced by pre and post heat treating, but not by anodization. The findings suggest that it is possible to estimate tensile adhesion strength from shear adhesion test results and that the interfacial strength of coatings must be measured directly, without using an adhesive.
Gearing Up Solution Precursor Plasma Spray for YAG TBCs for Production
Authors: Jordan Eric H. , Gell Maurice , Kumar Rishi , Jiang Chen
Published: January 2023

Yttrium aluminum garnet (YAG) has desirable properties for a thermal barrier coating (TBC), although there are two production challenges. One, YAG has a relatively low thermal expansion coefficient which leads to large thermal mismatch stresses, and two, amorphous phases are produced by atmospheric plasma spraying. Solution precursor plasma spraying (SPPS) has to potential to solve both problems. First off, it produces no amorphous phases. Secondly, it can produce a cracked microstructure that mitigates the CTE mismatch issue. To judge the adequacy of the properties of SPPS YAG, a summary of the properties of common TBCs is presented. It is shown that the properties of SPPS YAG fall within desirable or usable ranges. Current efforts described in this paper focus on improving the efficiency and rate of deposition.
Influence of Feedstock Pre-Treatment of Dynamic Flowability of HVOF Powders
Authors: Tillmann W. , Brinkhoff A.
Published: January 2023

This study investigates the effect of preheating on the dynamic flowability of HVOF powders, including conventional WC-Co, nano WC-Co, WC-FeCrAl, and Cr3C2-NiCr. The results show that the flowability of WC-Co powders can be significantly improved with a two-hour preheat at 200 °C. One explanation for the improvement is that moisture absorbed by the powder is released during pretreatment, but further study is required as it was found that dynamic density influences flow behavior as well.
Effects of Gun Scanning Pattern on the Structure and Corrosion Resistance of Plasma Sprayed YSZ Coatings
Authors: Ohnuki Takuma , Kuroda Seiji , Araki Hiroshi , Chen Xiaolong , Watanabe Makoto , Sakamoto Yukihiro
Published: January 2023

Due to the nonsymmetric distribution of the particle plume in conventional plasma spraying, significant influence of the gun scanning pattern can appear in the structure of the coatings obtained. In this study, three scanning patterns are used to deposit YSZ powder by means of air plasma spraying. Cross-sections of the coatings are examined and interfacial fracture toughness and hot corrosion tests are conducted. Improvements in coating adhesion and corrosion resistance were obtained by modifying the scanning pattern of the gun to decrease the possibility of horizontal weak bonding between spray passes.
The Microstructure and Properties of Plasma Sprayed Nanostructured 5 wt% and 8 wt% Yttria Stabilized Zirconia Coatings
Authors: Li Zheng , Gao Yang
Published: January 2023

Yttria stabilized zirconia with a composition of ZrO2-8wt%Y2O2 typically serves as the topcoat in thermal barrier coating systems. It has been reported, however, that YSZ with lower yttria content is more resistant to thermal shock and the effects of high-temperature sintering. To investigate these reports, nano-agglomerated 5YSZ and 8YSZ powders were deposited on FeCrAl substrates by atmospheric plasma spraying and the coatings were heat treated at 1400 °C for 1, 5, and 20 h. The nanostructure content in the 5YSZ samples was found to be about 20% higher, the microhardness 11% lower, and the size of unmelted particles about 27% smaller, which shows that bimodal structured 5YSZ has higher sintering resistance than traditionally used 8YSZ.
Numerical Design of an Adaptive-Pressure Plasma Coating Process
Authors: Ivchenko Dmitrii , Mariaux Gilles , Vardelle Armelle , Goutier Simon , Itina Tatiana E.
Published: January 2023

Thermal barrier coatings are generally produced one of two ways, depending on the thermomechanical loading expected. This study assesses an alternative approach in which the output of an air plasma torch is directed through two chambers connected by an expansion nozzle. In the first chamber, the particles evaporate under high pressure and temperature conditions. The vapor then passes through a supersonic nozzle into a low-pressure chamber where it condenses on the target substrate. A number of models are developed and used in order to assess the effects of process geometry and operating conditions on gas flows, powder vaporization efficiency, and nucleation and growth kinetics. Numerical simulations also informed various design decisions such as the length of the high-pressure chamber and the diameter of the expansion nozzle.
Preparation and Thermophysical Properties of CeO2-Gd2O3 Co-Stabilized Zirconia Thermal Barrier Coatings
Authors: Yang T. , Ma W. , Meng X.-F. , Li E.-B. , Bai Y. , Liu C.-W. , Dong H.-Y.
Published: January 2023

In this work, CeO2-Gd2O3 co-stabilized ZrO2 (CGZ) thermal barrier coatings are deposited by solution precursor plasma spraying and the microstructure, phase stability, thermophysical properties, and thermal cycling behaviors of the resulting coatings are investigated and discussed in comparison to conventional 8YSZ coatings.
Aerosol Spraying of Bismuth Vanadate for Hydrogen Technology
Authors: Wolpert Charline , Gärtner Frank , Vidaller Maria Villa , Klassen Thomas , Akedo Jun , Shinoda Kentaro , Schieda Mauricio , Emmler Thomas
Published: January 2023

Dense, nanostructured bismuth vanadate thin films were successfully deposited by aerosol deposition at room temperature. Aerosol deposition offers an alternative route for fabrication of photoactive metal oxide coatings as no binders or sintering processes are employed. A micron-sized bismuth vanadate powder was used to spray photoactive films (< 1 µm) on conductive fluor-doped tin oxide layers on glass and titanium substrates. The thin films are photocatalytically active under solar light due to the band gap energies of bismuth vanadate, and their nanosized structure increases surface area and catalytic activity. The coatings obtained were assessed based on microstructure, layer thickness, mechanical integrity, and photoelectrochemical activity.
Field Application of Cold Spray for Repairs in the Navy and Industry
Authors: Widener Christian A. , Johnson Kyle , Klus Kris
Published: January 2023

This paper provides an update on the state of cold spray corrosion mitigation and repair as it applies to equipment operated by the U.S. Navy. It also presents several application scenarios in which cold-sprayed Al 6061 and NiCr-CrC can improve preventative maintenance and dimensional restoration procedures currently used on A36 steel and CuNi structures.
The Effect of In-Process Heat Treatment on the Mechanical Properties of Cold Spray Coatings
Authors: Jenkins Richard , Aldwell Barry , Cassidy Jonathan , Lupoi Rocco
Published: January 2023

This study assesses the mechanical performance of cold-sprayed aluminum 6061 coatings heat treated using focused IR radiation. The heat treatment was performed in-process with the aim of improving the ductility and strength of the coatings. The properties of the heat-treated samples are compared to those achieved using traditional annealing and as measured in as-sprayed samples. It was found that the rapid IR heat treatment increased the ultimate tensile strength of the coatings by 52% and elongation at failure by 43%.
Microstructure and Mechanical Properties of In-Situ TiB2 Particle Reinforced AlSi10Mg Composite Coatings Produced by Cold Spraying
Authors: Xie Xinliang , Chen Chaoyue , Wu Hongjian , Verdy Christophe , Liao Hanlin , Chen Zhe , Wang Haowei , Ji Gang
Published: January 2023

This study investigates the effect of heat treatment on the microstructure and tribological properties of TiB2-reinforced AlSi10Mg composite coatings produced by cold spraying. SEM and XRD analysis showed that the microstructure of the feedstock powder was well preserved in the as-sprayed material with uniformly distributed TiB2 nanoparticles, some aggregated clusters, and a cellular-like network of fine eutectic Si particles embedded in an aluminum matrix. With increasing heat treatment temperature, the Si particles grew larger in size, but significantly fewer in number and a reduction in microhardness was observed due mainly to the elimination of the work hardening effect and coarsening of the Si particles.
Quantification and Assessment of the Mechanical Strength of Low-Pressure Cold-Sprayed Tungsten Carbide-Nickel Metal Matrix Composite Coatings
Authors: Munday Guriqbal Singh , Hogan James David , McDonald André
Published: January 2023

WC-Ni metal-matrix composite coatings were deposited by low-pressure cold spraying using feedstock powders with different amounts of carbide. Uniaxial quasi-static tensile testing was conducted on the as-sprayed coatings to investigate the effect of porosity, particle size, and mean free path on mechanical properties. The evolving strain fields were measured via digital image correlation and image analysis was used to characterize coating microstructure. The coatings with higher carbide content exhibited better tensile properties, which is attributed to significant consolidation of the matrix, increased interfacial area, smaller average carbide size, and reduced mean free path between carbide particles.
Armor W-Cr Coatings for Plasma-Facing Components in Tokamaks by Cold Spray and RF-ICP
Authors: Cizek Jan , Klecka Jakub , Vilemova Monika , Matejicek Jiri , Veverka Jakub , Musalek Radek , Lukac Frantisek , Kondas Jan , Zlatnik Rostislav
Published: January 2023

Tungsten and its alloys are promising candidates for protecting plasma-facing components in fusion reactors such as tokamaks. However, processing is complicated by tungsten’s brittleness, CTE mismatch with copper and steel, susceptibility to grain growth and oxidation above 500 °C, and poor weldability. Given these factors, attention is shifting from conventional methods to powder and additive techniques. In this work, two technologies are employed for consolidation of W and WCr layers: cold kinetic spraying and inductively-coupled plasma spraying. Both methods overcome production challenges by depositing plasma-facing layers directly on structural parts, without the need for joining and the risk of oxidation. The properties of W and WCr coatings obtained by both methods are assessed by means of SEM, XRD, and mechanical and thermal analysis.
Capability of High-Speed Laser Cladding Process with Iron-Based Alloys
Authors: Schmengler C. , Hitzek A. , Wank A.
Published: January 2023

This study assesses the applicability of high-speed laser cladding for producing iron-based alloy coatings, in particular, CrNi duplex steel, FeCrV, and FeCrNiB. Process parameters are optimized for 150 µm thick claddings on mild steel using different laser power levels, surface speeds, and preheating temperatures. Claddings are also produced on cylindrical substrates of different diameters to investigate dependency on component geometry. Duplex steel was found to be highly processable by high-speed laser cladding. In contrast, crack-free FeCrV claddings can only be produced on small diameter surfaces, and only with preheating, while FeCrNiB could not be applied at all without cracking.
Cascaded Arc Gun for Low Pressure Plasma Spray Applications
Authors: Colmenares Jose , Gutleber Jonathan , Gindrat Malko , Pegler Aaron
Published: January 2023

This paper evaluates the performance of a new single-cathode cascaded arc spray gun developed for low-pressure plasma spraying (LPPS). It describes key design features, explaining how they contribute to arc and voltage stability, improved thermal efficiency, higher throughput, and extended equipment life. It assesses the effect of nozzle geometry on spray spot morphology and examines the microstructure of CoNiCrAlY and YSZ coatings deposited on different substrates, including a turbine blade, using the new gun. Cross-sectional images show the uniformity of the CoNiCrAlY coatings in different locations on the turbine blade, including platform, fillet, and airfoil surface.
Hybrid Additive Manufacture of 316L Stainless Steel with Cold Spray and Selective Laser Melting: Microstructure, Mechanical Properties, and Case Study
Authors: Yin Shuo , Jenkins Richard , Kazasidis Marios , Lupoi Rocco , Yan Xingchen , Chen Chaoyue
Published: January 2023

In this work, a novel additive manufacturing process was proposed and employed in the production of stainless steel components. The underlying concept is to use selective laser melting (SLM) to fabricate a core structure onto which basic features are added by cold spraying (CS), followed by heat treatment and finish machining. The microstructure and mechanical properties of as-fabricated and heat-treated parts were studied, and interfacial bonding between the SLM core and a typical CS feature was assessed. In the as-fabricated state, it is observed that the CS material has a dendritic structure similar to the feedstock, while the SLM core is characterized by cellular subgrains confined in coarse grain structures. Following heat treatment, interparticle boundaries are less well defined, equiaxed coarse grains and twinning appear, and the extremely fine subgrains in the SLM material are enlarged. Heat treatment is also shown to improve tensile strength in the CS material and interfacial bond strength between the CS features and SLM core.
Development of Super Stainless Steel Coating with Improved Corrosion Resistance and Enhanced Hardness Focusing on Characteristics of Atmosphere Plasma Spray Process
Authors: Zeng Zhensu , Makino Yukinobu , Sako Sayaka , Era Hidenori , Muraoka Ken , Kuroda Seiji
Published: January 2023

This study assesses the effect of different alloying elements on the microstructure, oxygen content, hardness, and corrosion resistance of stainless steel coatings produced by atmospheric plasma spraying. SUS836L stainless steel powder with Si, Mn, and B additions served as the base feedstock alloy to which different amounts of B, C, Mo, Ti, Nb, V, and Cu were added. The powder mixtures were sprayed on carbon steel substrates and the deposits were examined and tested. The results show that B and C additions of 2-3% have a beneficial effect, but at 5% cause a drop in corrosion resistance that proved to be remediable through the addition of Cu, which improves the corrosion potential of the matrix phase by its combined action with Mo, Si, and B. The effect of Ti, Nb, and V, which are added to suppress Cr oxidation in molten alloy particles during flight, is that it promotes that formation of fine carbide and boride compounds, increasing hardness without sacrificing corrosion resistance. In addition to these findings, the study also shows that the coatings developed are in many ways comparable to Ni-based self-fluxing alloy coatings.
A Novel Method for Generating a Single Layer of Powder and Calculating the Packing Density with the Assistance of White-Light Interferometry for Electron Beam Powder Bed Fusion (EB-PBF)
Authors: Alchikh-Sulaiman Basel , Carriere Paul R. , Yue Stephen
Published: January 2023

Despite the wide application of powder metallurgy in the field of additive manufacturing, a general understanding of the spreadability of powder particles in electron beam powder bed fusion (EB-PBF) is lacking. This paper presents the results of a literature review on particle flowability and spreading in additive processes. Different flowability tests are described and spreading mechanisms for different powder-bed processes are reviewed. A technique is proposed to study spreadability in which a single layer of powder is ‘frozen’ in the as-spread condition by contact sintering and then characterized using white-light interferometry. A standard method to calculate powder-bed density is defined based on this approach, and correlations between density, packing factor, and flowability are established.
Residual Stress Measurements in Wire-Arc Sprayed ZnAl15 Coatings
Authors: Bobzin Kristen , Öte Mehmet , Knoch Martin Andreas
Published: January 2023

In recent studies, crack formation was observed in oxidized areas of wire-arc sprayed Zn-Al coatings. As corrosion tests show, these cracks allow electrolyte to penetrate the coating, reducing effective service lifetime. Wire-arc sprayed coatings usually exhibit tensile residual stresses with the potential to cause such cracking. To determine the extent of that potential, the stress state of Zn-Al coatings was measured and correlated with corrosion test results. Residual stress was obtained using the sin2ψ method based on XRD analysis and the results are combined with those of previous studies, forming a hypothesis for the root cause of crack formation in wire-arc sprayed Zn-Al coatings, its effects, and its control.
Microstructure and Thermal Properties of Double Rare-Earth Co-Doped SrZrO3 Coating by Solution Precursor Plasma Spray
Authors: Meng X.-F. , Ma W. , Huang W. , Li E.-B. , Bai Y. , Liu C.-W.
Published: January 2023

Strontium zirconate is a candidate material for thermal barrier coatings due to its high melting point, good sintering resistance, and high TCE. One drawback, however, is a phase transition that occurs below 1200 °C , although rare-earth element doping offers a way to suppress it. In this study, SrZrO3 doped with two rare earth oxides, ytterbia and gadolinia, is deposited by solution precursor plasma spraying and the layers obtained are evaluated before and after heat treatment. The coatings are characterized by two phases, SrZrO3 and t-ZrO2, with interpass boundary structure, nano and microscale porosity, and through-thickness vertical cracks. XRD analysis after heat treatment at 1400 °C for 360 h shows that the two phases are very stable due to the doping of rare-earth elements, which is also shown to reduce thermal conductivity in the as-sprayed deposits by nearly 35%.
Influence of YSZ Powder Characteristics on the Morphology of PS-PVD Thermal Barrier Coatings
Authors: Jia Fang , Gao Lihua , Yu Yueguang , Ji Xiojuan , Zhang Deming , Peng Haoran , Lu Xiaoliang , Hou Weiao
Published: January 2023

The aim of this study is to understand how the characteristics of feedstock powders impact the morphology of thermal spray coatings. In the experiments, YSZ powders were prepared, characterized, and deposited on nickel-base superalloy substrates by plasma spray physical vapor deposition (PS-PVD) and the coatings were examined and tested. The results indicate that particle size distribution is an important factor in coating quality and that very fine-grained powder (< 12 µm) is not conducive to the formation of a columnar crystal structure. A powder with a rough, porous structure, on the other hand, readily absorbs heat and is thus easily vaporized, leading to a good columnar structure in the coating. In contrast, dense powder is difficult to vaporize, which promotes the formation of layered structures. Among the coatings with a columnar structure, one produced from powders with a particle size of 16.7 µm exhibited the lowest porosity and highest microhardness.
Solar Thermal Process Parameters Forecasting for Evacuated Tubes Collector (ETC) Based on RNN-LSTM
Authors: Muhammad Ali Akbar  , Ahmad Jazlan  , Muhammad Mahbubur Rashid  , Mohd Zaki Hasan Firdaus , Muhammad Naveed Akhter  , Embong Abd Halim
Published: January 2023

Solar Heat for Industrial Process (SHIP) systems are a clean source of alternative and renewable energy for industrial processes. A typical SHIP system consists of a solar panel connected with a thermal storage system along with necessary piping. Predictive maintenance and condition monitoring of these SHIP systems are essential to prevent system downtime and ensure a steady supply of heated water for a particular industrial process. This paper proposes the use of recurrent neural network-based predictive models to forecast solar thermal process parameters. Data of five process parameters namely - Solar Irradiance, Solar Collector Inlet & Outlet Temperature, and Flux Calorimeter Readings at two points were collected throughout a four-month period. Two variants of RNN, including LSTM and Gated Recurrent Units, were explored and the performance for this forecasting task was compared. The results show that Root Mean Square Errors (RMSE) between the actual and predicted values were 0.4346 (Solar Irradiance), 61.51 (Heat Meter 1), 23.85 (Heat Meter 2), Inlet Temperature (0.432) and Outlet Temperature (0.805) respectively. These results open up possibilities for employing a deep learning based forecasting method in the application of SHIP systems.
ABSTRAK: Penggunaan sumber bersih seperti Tenaga Solar dalam Proses Industri (SHIP) adalah satu kaedah alternatif untuk menhasilkan tenaga yang boleh diperbaharui bagi mengurangkan kesan gas rumah hijau yang terhasil dari proses industri. Sistem SHIP biasanya mengandungi panel solar dan sistem penyimpanan haba yang berhubung melalui paip yang sesuai. Penyelengaraan secara berkala diperlukan bagi memastikan sistem ini sentiasa membekalkan tenaga solar pada kadar bersesuaian dan bekalan tenaga solar yang terhasil berterusan dan tidak menjejaskan sistem pemanasan air bagi sesuatu proses industri. Kajian ini mencadangkan penggunaan model ramalan rangkaian neural berulang bagi meramal parameter proses pemanasan solar. Kelima-lima parameter proses iaitu – Iradiasi Solar, Suhu Saluran Keluar & Masuk Pengumpul Solar dan Bacaan Kalorimeter Fluks pada dua tempat diambil sepanjang empat bulan (dari Julai 2021 sehingga Oktober 2021). Dapatan menunjukkan dua varian RNN termasuk LSTM dan Unit Berulang dapat dibanding prestasinya bagi tugas ramalan ini. Dapatan kajian menunjukkan Ralat Punca Min Kuasa Dua (RMSE) antara bacaan sebenar dan ramalan adalah masing-masing 0.4346 (Iradiasi Solar), 61.51 (Meter Terma 1), 23.85 (Meter Terma 2), Suhu Salur Masuk (0.432) and Suhu Salur Keluar (0.805). Ini membuka peluang kajian mendalam berdasarkan kaedah ramalan dalam aplikasi sistem SHIP.
Le nouveau régime de la responsabilité financière des gestionnaires publics
Authors: Mourroux Jérôme , Pain Pascal
Published: January 2023

La Constitution et la loi organique relative aux lois de finances ont renforcé les préoccupations d’efficacité et de performance dans la sphère publique. Dans le cadre du programme « Action publique 2022 », une nouvelle étape est franchie avec la réforme du régime de la responsabilité des gestionnaires publics, qui augmentera les marges de manoeuvre et modifiera le régime actuel de responsabilité des ordonnateurs et des comptables publics. Cette évolution prendra effet au 1er janvier 2023. Mais constitue-t-elle un réel changement de paradigme ? Quelles sont les opportunités de modernisation financière et de renforcement du contrôle interne pour les acteurs publics ?
Le vaccin contre la Covid-19 a-t-il un impact sur le marché financier marocain ?
Authors: Mouhssine Yassine
Published: January 2023

L’objectif de cet article est d’examiner le co-mouvement et la corrélation dynamique entre l’évolution du taux de vaccination contre la Covid-19 au Maroc et la performance de la bourse de Casablanca, sur la base des données quotidiennes couvrant la période du 1 Mars 2020 au 6 août 2021. Pour ce faire, l’approche de Cohérence en Ondelettes (CEO) a été adopté. Nos résultats empiriques montrent la vulnérabilité de ce marché financier à performer en période de crise sanitaire. De plus, CEO révèle une cohérence forte et significative entre la performance boursière et le taux de vaccination contre la Covid-19, avec une dominance positive de la vaccination sur les rendements.
Epistula imperatoris Hadriani ad Gerusiam Ephesiorum. List cesarza Hadriana do geruzji Efezjan z 27 września 120 r. po Chr. Tekst, tłumaczenie, komentarz
Authors: Tadajczyk Konrad
Published: January 2023

Cesarz Hadrian, podobnie jak inni princepsi, popierał funkcjonowanie starych instytucji greckich, takich jak geruzja, zasady ich działania oraz posiadane kompetencje. Przetłumaczony list zawiera rozstrzygnięcie wydane przez Hadriana w sprawie sporu geruzji efeskiej z niektórymi obywatelami Efezu. List opatrzony jest komentarzem.
Revisiting the Most Successful United States Food and Drug Administration-approved Anti-obesity Drug Sibutramine sulfate: A Comprehensive Pharmacotherapeutic Review
Authors: L Yadav , S Sahu , B Agrawal , R Meshram
Published: January 2023

Introduction: Serotonin (5-HT) and noradrenaline (NA) reuptake inhibitor sibutramine work together. Sibutramine primarily affects food intake and energy expenditure by way of its two pharmacologically active metabolites, primary and secondary amines, which cause significant weight loss. In addition to stimulating thermogenesis and enhancing the physiological process of satiety, it can also increase the efferent sympathetic activity to brown fat that is thermochemically active. Aim: Revisiting the Most Successful United States Food and Drug Administration-approved Anti-obesity Drug Sibutramine sulfate. Methodology: For a duration of 10 years, literature is covered. Results: Clinical studies using sibutramine show a dose-related decrease in body weight, with weight loss up to 11% below the baseline that can last up to 18 months with ongoing therapy. Patients assigned to the sibutramine medication continued to lose weight throughout a 1-year period, reaching 15% below baseline, while the patients receiving the placebo treatment had some weight increase when weight loss is induced with a very low-calorie diet (VLCDL). By lowering the biochemical risk factors for obesity, such as plasma triglycerides, total cholesterol, low-density lipoprotein (LDL) cholesterol, glucose, and insulin, and raising HDL cholesterol, sibutramine enhances metabolic fitness. Conclusion: Sibutramine has been shown to be a beneficial treatment for obese people with moderately high blood pressure, and it has even been shown to reduce blood pressure on average as a result of weight reduction. The potential for misuse that is associated with amphetamine is not present with sibutramine, and in investigations evaluating abuse potential, it is identical to placebo.
Web application for facial wrinkle recognition
Authors: Тарасова Олена Юріївна , Мінтій Ірина Сергіївна
Published: January 2023

Facial recognition technology is named one of the main trends of recent years. It’s wide range of applications, such as access control, biometrics, video surveillance and many other interactive humanmachine systems. Facial landmarks can be described as key characteristics of the human face. Commonly found landmarks are, for example, eyes, nose or mouth corners. Analyzing these key points is useful for a variety of computer vision use cases, including biometrics, face tracking, or emotion detection. Different methods produce different facial landmarks. Some methods use only basic facial landmarks, while others bring out more detail. We use 68 facial markup, which is a common format for many datasets. Cloud computing creates all the necessary conditions for the successful implementation of even the most complex tasks. We created a web application using the Django framework, Python language, OpenCv and Dlib libraries to recognize faces in the image. The purpose of our work is to create a software system for face recognition in the photo and identify wrinkles on the face. The algorithm for determining the presence and location of various types of wrinkles and determining their geometric determination on the face is programmed.
Технологія використання наукометричної бази даних Scopus для оцінювання результативності педагогічних досліджень
Authors: Спірін Олег Михайлович , Вакалюк Тетяна Анатоліївна , Мінтій Ірина Сергіївна , Іванова Світлана Миколаївна , Шимон Олександр Михайлович
Published: January 2023

У роботі описано технологію використання інформаційно‐ цифрових технологій (зокрема, наукометричної бази даних Scopus) задля оцінювання результативності педагогічних досліджень. Так, використовуючи дослідницький, пояснювально‐ілюстративний та евристичний методи розглянуто різні форми використання НБД Scopus – як задля оцінювання результативності педагогічних досліджень окремого науковця (перегляд загальних даних, наукометричних показників – h‐індексу, загальної кількості цитувань, загальної кількості публікацій; активності за роками, популярності публікацій за роками, цитованості окремих публікацій, визначення місця (рангу) науковця в установі та ін.), так і певної установи (перегляд загальних даних, кількості публікацій, кількості авторів, рейтингів авторів за різними критеріями, тематики публікацій, співпраці з іншими установами та ін.). Для вдосконалення змісту перепідготовки науково‐педагогічних та наукових працівників щодо оцінювання результативності педагогічних досліджень було: 1) підібрано інформаційно‐цифрові технології (зокрема, були відібрані НБД, зокрема Scopus) для оцінювання результативності педагогічних досліджень; 2) удосконалено зміст перепідготовки науково‐педагогічних та наукових працівників у формі підвищення кваліфікації з врахуванням вдосконалення процесу навчання щодо оцінювання результативності педагогічних досліджень з використанням інформаційно‐цифрових технологій (зокрема, НБД Scopus); 3) розроблено та впроваджено курс «Інформаційно‐цифрові технології в оцінюванні результативності педагогічних досліджень» для ознайомлення з особливостями використання різних інформаційно‐ цифрових технологій у перепідготовці науково‐педагогічних та наукових працівників, а також розроблено відповідно навчально‐ методичний комплекс курсу; 4) розроблено рекомендації щодо використання інформаційно‐цифрових технологій (зокрема, НБД Scopus) для оцінювання результативності педагогічних досліджень. Стаття може бути корисною науково‐педагогічним та науковим працівникам задля підвищення їх цифрової компетентності.
3rd International Conference on History, Theory and Methodology of Learning (ICHTML 2022). Kryvyi Rih, Ukraine, May 16-17, 2022
Authors: Гаманюк Віта Анатоліївна , Семеріков Сергій Олексійович , Шрамко Ярослав Владиславович
Published: January 2023

Proceedings of the 3rd International Conference on History, Theory and Methodology of Learning (ICHTML 2022). Kryvyi Rih, Ukraine, May 16-17, 2022
Studi Peluang Penghematan Pemakaian Energi pada Gedung Sekretariat Jenderal Pekerjaan Umum
Authors: Sujatmiko Wahyu
Published: January 2023

Gedung lama seperti Gedung Sekretariat Jenderal Kementerian Pekerjaan Umum yang telah berusia lebih 25 tahun perlu dikaji tingkat efisiensi penggunaaan energinya. Terkait dengan tujuan tersebut, studi peluang penghematan energi pada Gedung Sekjen-PU telah dilakukan dengan mengkaji selubung bangunan (OTTV dan RTTV), Intensitas Konsumsi Energi (IKE), profil energi, tingkat pencahayaan, kondisi termal ruangan dan persepsi termal penghuni. Hasil studi memperlihatkan bahwa OTTV 21,71 W/m2, RTTV 7,31 W/m2, IKE 154,815 kWh/m2/tahun (12,9 kWh/m2/bulan), faktor daya 0,922, berarti kategori efisien, akan tetapi fasa tidak seimbang sehingga terjadi arus netral yang cukup besar, konsentasi CO2 rendah, yakni 762,5 ppm, tetapi rata-rata temperatur dan kelembaban tinggi, yakni 26,3 oC dan 61,3%, berarti terdapat kebocoran energi. Rentang rata-rata tingkat pencahayaan 98-147 lux, berarti di bawah standar 250 lux. Penghuni merasakan bahwa kondisi ruangan lebih rendah dari netral, tidak seluruh penghuni menerima kondisi ini dan cenderung ingin kondisi temperatur lebih rendah. Dengan demikian direkomendasikan untuk melakukan penghematan dengan perbaikan tingkat kebocoran pemakaian pengkondisian udara dan meningkatkan tingkat pencahayaan saat ini.
Housing Careers di Indonesia, Studi Kasus Kota Bandung
Authors: Rosa Yulinda
Published: January 2023

Penelitian faktor-faktor yang berpengaruh terhadap permintaan perumahan (housing demand) perlu dilakukan. Hal ini bertujuan untuk mengurangi jumlah rumah terbangun yang tidak dihuni dimana dalam kondisi saat ini backlog rumah terus meningkat dari tahun ke tahun. Salah satu faktor tersebut adalah housing careers. Housing careers adalah pergerakan seseorang untuk mendapatkan rumah, menggambarkan seseorang atau pasangan muda mulai meninggalkan rumah orang tua dan pindah menyewa rumah di tempat lain. Melalui informasi housing careers, kebutuhan rumah dapat diprediksi dari data demografi yang mudah didapat karena dikumpulkan secara rutin. Metode penelitian survei dengan teknik multy stage sampling, data yang dikumpulkan merupakan data primer, dengan menggunakan instrumen kuesioner serta diskusi atau tanya jawab langsung dengan responden. Metode analisis deskriptif dan analisis faktor digunakan dalam penelitian ini. Housing careers di Kota Bandung terdiri dari dua tahap. Tahap pertama, tahap sebelum menikah ditempuh rata-rata umur 20 sampai 23 tahun, tahapan ini menggambarkan pergerakan waktu ketika seorang memutuskan untuk bekerja, kemudian meninggalkan rumah orang tua untuk hidup mandiri, tempat tinggal yang dimiliki pada tahap ini masih dibantu orang lain belum mempunyai tempat tinggal yang mandiri. Tahap kedua, adalah tahap ketika memutuskan menikah dan mempunyai anak ditempuh pada rata-rata umur 25 tahun, dapat tinggal bersama dengan keluarga inti rata-rata umur 27 tahun dan rata-rata umur anak pertama 6 tahun, pertama kali mempunyai rumah sendiri. Kebutuhan tempat tinggal pada tahap setelah menikah adalah tempat tinggal yang lebih stabil untuk menunjang kehidupan rumah tangga.