bluuebunny/crossref_metadata_2025_split huggingface dataset:
Response of Financial Markets to COVID-19 Pandemic: A Review of Literature on Stock Markets
Authors: Fianto Bayu Arie , Ridhwan Masagus M. , Shah Syed Alamdar Ali , Faris Muhammad , Mohd Ruslan Rafiatul Adlin Hj 
Published: September 2022

The objective of this research is to consolidate the literature published on the COVID-19 crisis impact on global stock markets to gain managerial implications from the crisis. It performs a thematic bibliometric review of the literature published in Scopus-ranked journals since the beginning of the pandemic using FCWI, Piecharts, and VOSViewer. It identifies the most under-researched regions and eight emerging sub-themes. The research finds that the benchmark theme is market behavior during the COVID-19 crisis, whereas an emerging benchmark theme is the markets after the COVID-19 crisis. The holistic view of the literature supporting eight sub-themes suggests that the government's role is of utmost importance to handle the impact of the COVID-19 crisis, which should be industry-specific. It identifies that all eight sub-themes of the research are the future research directions in all and specifically in the South American, African, South East Asian, and Oceania regions till the crisis continues. Doi: 10.28991/ESJ-2023-SPER-03 Full Text: PDF
PEMBERDAYAAN PETANI JAMUR TIRAM MELALUI PELATIHAN DAN PENDAMPINGAN STRATEGI PEMASARAN PADA MASA PANDEMI COVID-19
Authors: Sukanteri Ni Putu , Lestari Putu Fajar kartika , Susanti Ida Ayu Dwi 
Published: September 2022

Petani di Desa Belumbang merupakan salah satu produsen jamur tiram di Bali. Produksi jamur tiram dilakukan untuk membuka peluang usaha bagi mereka yang saat ini tidak mempunyai pekerjaan akibat terkena dampak pandemi covid 19. Tujuan kegiatan pengabdian ini adalah untuk memberikan pelatihan dan pendampingan memasarkan pada jamur tiram secara konvensional dan secara online. Metode kegiatan dilakukan dengan pelatihan dan pendampingan kepada petani jamur dilakukan dengan beberapa tahap yaitu : Tahap kegiatan pengabdian yang dilakukan untuk membantu mitra dalam menyelesaikan permasalahannya adalah (1) Persiapan kegiatan pengabdian; (2) Penyuluhan dan pendampingan dengan penekanan mengurangi dampak Covid-19. Pelaksanaan kegiatan diawali dengan persiapan bahan dan alat, selanjutnya memberikan penyuluhan/pelatihan tentang strategi pemasaran dan pengemasan jamur tiram. Hasil pre test menunjukkan sejumlah 53,33 % mitra kegiatan telah mengetahui pemasaran secara online namun belum melakukan pemasaran dengan cara tersebut. Pelatihan pemasaran meliputi pengemasan dan pemberian merek dagang pada kemasan jamur tiram yang dipasarkan oleh anggota. Sehingga kegiatan pelatihan yang dilakukan kepada anggota kelompok petani terdapat perubahan ketrampilan yang dimiliki oleh anggota kelompok petani nantinya pada kegiatan produksi dan pemasaran sehari-hari. Kegiatan dilaksanakan dalam bentuk penyuluhan dan pelatihan. Penyuluhan pada anggota kelompok petani jamur menunjukkan pengingkatan pengetahuan sebesar 40% dari sebelum pelatihan. Penguasaan ketrampilan pengemasan menunjukkan 100% anggota petani jamur mempunyai ketrampilan dalam mengemas produk jamur yang akan di pasarkan. Pemasaran jamur belum optimal disebakan adanya kendala dalam produksi dan pemasaran yang belum teratasi.
EDUKASI ECOBRIK SEBAGAI UPAYA PENANGGULANGAN SAMPAH PLASTIK DI SEKOLAH DASAR NEGERI 6 MEULABOH, ACEH BARAT
Authors: Suriani Mai , Islama Dini , Rahmi Mira Mauliza , Rahmayanti Fitria , Najmi Nurul , Diana Farah 
Published: September 2022

Sampah plastik adalah salah satu jenis sampah yang tidak mudah terurai dan tidak ramah lingkungan. Sampah plastik masih menjadi masalah utama bagi masyarakat yang belum terselesaikan karena masih rendahnya tingkat daur ulang dan kurangnya penanganan yang tepat di lingkungan masyarakat maupun sekolah. Tujuan kegiatan ini adalah sebagai upaya menanggulangi sampah plastik di lingkungan Sekolah Dasar (SD) Negeri 6 Meulaboh Aceh Barat dengan memberikan edukasi tentang praktik ecobrik dan memunculkan vibes positif kepada siswa untuk mengelola sampah plastik menjadi sesuatu yang bermanfaat. Kegiatan edukasi ini dilaksanakan dengan dua tahapan yaitu persiapan (penjaringan informasi lokasi pelaksanaan kegiatan dan berkoordinasi dengan mitra) dan tahap pelaksanaan (sosialisasi dan praktik ecobrik). Pelatihan bagi mitra dilakukan dengan menggunakan metode ceramah, diskusi interaktif dan praktik langsung membuat ecobrik bersama siswa SD Negeri 6 Meulaboh Aceh Barat. Output kegiatan ini yaitu meningkatkan pengetahuan dan keterampilan siswa sekolah dasar melalui praktik ecobrik untuk mengelola sampah plastik di sekitar lingkungannya menjadi sesuatu yang bermanfaat dalam kehidupan sehari-hari. Kesimpulan kegiatan ini adalah edukasi ecobrik mampu meminimalisir dampak sampah plastik melalui pengelolaan kreatif, edukatif dan berkelanjutan, serta menumbuhkan kesadaran menjaga lingkungan dengan memunculkan vibes positif sejak dini kepada siswa. Edukasi dan pelatihan pembuatan ecobrik di SDN 6 Meulaboh ini mampu mengurangi sampah plastik dilingkungan sebanyak 11,37 kg.
PENERAPAN DIGITAL MARKETING BERBASIS FACEBOOK PADA UMKM KERUPUK SAGU
Authors: Asriani Asriani , Herdhiansyah Dhian , Rizka Syahria , Rismawan Yandi 
Published: September 2022

UMKM perlu mendapatkan perhatian agar dapat berkembang secara kompetitif. Perkembangan teknologi informasi telah mengubah lingkup dunia pemasaran dalam beberapa tahun terakhir ini dimana metode komunikasi pemasaran yang sebelumnya bersifat tradisional dan konvensional kini telah terintegrasi dalam dunia digital. Kegiatan pemasaran yang memanfaatkan kecanggihan teknologi digital dikenal dengan digital marketing. Digital marketing terdiri dari pemasaran interaktif dan terpadu yang memudahkan interaksi antara produsen, perantara pasar dan calon konsumen terutama bagi UMKM. Kegiatan pengabdian masyarakat ini bertujuan untuk mengaplikasikan strategi pemasaran secara online melalui sistem digital marketing berbasis media social melalui pembuatan akun marketplace facebook terhadap usaha kerupuk sagu dalam upaya memperkenalkan produk baru kepada konsumen dan meningkatkan pangsa pasar produk kerupuk sagu. Metode pengambilan data dilakukan dengan metode survey dan observasi serta wawancara terhadap UMKM kerupuk sagu Annisa. Pelaksanaan kegiatan dilakukan melalui pelatihan pembuatan media pemasaran promosi berupa fitur marketplace facebook serta cara mempromosikan produk kerupuk sagu Annisa melalui media social facebook . Pelaksanaan pengabdian dilakukan melalui tahap identifikasi permasalahan mitra UMKM kerupuk sagu, perumusan solusi permasalahan, pelatihan sistem pemasaran online dengan menggunakan marketplace facebook serta melakukan survey pemahaman dan kepuasan mitra. Hasil identifikasi dari permasalahan mitra diketahui UMKM kerupuk sagu Annisa belum menerapkan sistem pemasaran online. Salah satu solusi yang ditawarkan adalah dilakukan pendampingan pembuatan fitur marketplace facebook untuk membantu dalam promosi. Berdasarkan hasil kegiatan UMKM kerupuk sagu saat ini telah memiliki marketplace facebook dengan nama “Kerupuk Sagu Annisa” yang dapat digunakan sebagai media promosi dalam upaya peningkatan pangsa pasar kerupuk sagu.
Plasma Transferred Wire Arc Spraying of Novel Wire Feedstock onto Cylinder Bore Walls of ALSI Engine Blocks
Authors: Schlaefer T. , Bobzin K. , Ernst F. , Richardt K. , Verpoort C. , Schreiber F. , Schwenk A. , Flores G. 
Published: September 2022

Abstract
Hypoeutectic AlSi engine blocks of modern passenger cars are generally equipped with cast iron liners in order to provide cylinder running surfaces that meet the tribological requirements. A very promising alternative to the use of cylinder liners lies within the application of thermally sprayed coatings onto the walls of cylinder bores as friction partners for the piston rings. This work describes the development of a novel iron based wire feedstock as well as its application by the Plasma Transferred Wire Arc internal diameter coating system. The material developed within the frame of this work leads to partially amorphous coatings with embedded nanoscale precipitations if processed by thermal spraying. The coatings were applied onto the inner diameters of test liners made of Aluminium EN AW 6060 and onto cylinder bore walls of in-line 4 cylinder engines. All substrates were mechanically roughened in order to obtain high bond strengths of the sprayed coatings. The coatings microstructure was analysed by light optical microscopy, hardness measuring by transmission electron microscopy. Furthermore the oil storage capacities of the honed surfaces were determined.
Development of Near Net Shape Coatings for Wear and Corrosion Protection
Authors: Bause T. , Bach F.-W. , Möhwald K. , Erne M. 
Published: September 2022

Abstract
In this work several powder materials typically used for wear and corrosion protection (WCCoCr, Cr3C2 NiCr, Cr2O3) were considered for developing near net shape coatings. In contrast to grain sizes commonly used in thermal spray processes the grain sizes of all examined powders were specified with maximum 25 µm (-15+5 µm, -20+5 µm, -25+5 µm). During the coating experiments the HVOF process was used to apply carbide based powder materials (WCCoCr, Cr3C2 NiCr) whereas the APS process was used to deposit Cr2O3 coatings. Taguchi techniques were utilized in order to reduce the number of experiments and to evaluate and to adjust main process variables. The effectiveness of these techniques could be verified by spraying validation samples successfully. The coatings were examined in terms of deposition efficiency, surface roughness, hardness, porosity, wear and corrosion resistance. The results showed that improvements in terms of porosity, surface roughness and corrosion resistance could be reached by introducing fine powder materials in the spray process. Reducing the influence of effects like decarburization or oxidation caused by the overheating of small spray particles should be considered in future work.
Erosion, Abrasive and Friction Wear Behaviour of Iron Aluminide Coatings Sprayed by HVOF
Authors: Guilemany J.M. , Cinca N. , Fernández J. , Sampath S. 
Published: September 2022

Abstract
Iron aluminides have been lately proposed as promising materials for wear applications. Many authors have focused their investigations on the friction behaviour of FeAl coatings emphasizing the role of this intermetallic as a new matrix to embed ceramic particles and replace for high temperature the extensively studied WC-Co cermet system. However, few works deal with the evaluation of the different tribological properties and their relationship with the coating microstructure. Thus, in the present study, the near stoichometric Fe40Al was successfully sprayed by means of HVOF using different spraying parameters and the tribological behaviour was assessed through solid particle erosion, abrasive and dry sliding tests. The wear mechanisms that took place in the produced coatings are discussed with regard to the obtained results. The friction coefficient versus sliding distance was obtained. In addition, isothermally treated samples in air were tested showing both lower friction coefficient and lower wear rate.
Operational Characteristics of Locally Fluidized Powder Feeders
Authors: Spaulding M. 
Published: September 2022

Abstract
Locally Fluidized Thermal Spray Powder Feeders have been commercially available for the past 25 years and have fundamentally different operating characteristics than the classic Volumetric Powder Feeder. This paper explores the design principles and factors effecting the operation and performance of this technology. The discussion will include the challenges faced in accurately and safely metering powder into high backpressure spray torches.
New Atomization Process to Achieve High Production Rates During Thermal Spraying of Thick Coatings
Authors: Uhlenwinkel V. , Achelis L. , Mädler L. 
Published: September 2022

Abstract
Because of their characteristic spray geometry, pressure-gas-atomizers can be used to create thick coatings from molten metal. Production rates of pressure-gas-atomizers are substantially higher compared to conventional Thermal Spraying (100 – 200 kg/h based on molten tin). The shape of the spray cone can be designed by the geometry of the atomizer. The mean particle sizes and velocities (molten tin and tin-copper alloys) are controlled by the gas flow. Powder products and coatings of several millimeters on steel substrates were investigated. The average density of the layer was higher than 99%.
Development of WC-Co Coatings Deposited by Warm Spray Process
Authors: Chivavibul P. , Watanabe M. , Kuroda S. , Kawakita J. , Komatsu M. , Sato K. , Kitamura J. 
Published: September 2022

Abstract
The high-velocity oxy-fuel (HVOF) process is commonly used to deposit WC-Co coatings. There are some problems with this process, especially the decomposition and decarburization of WC during the spraying. To eliminate these degradation, the warm-spray (WS) process originally developed by our group, which provides a possibility to control the flame temperature and the fabrication of WC-Co coatings can be made at lower temperature ranges that those of HVOF process, was applied to deposit WC-Co coatings. Microstructural characterization and phase analysis were carried out on deposited coatings by SEM and XRD. The mechanical properties such as hardness, fracture toughness, and wear properties were investigated. The results showed that WS coatings did not contain any detrimental phase such as W2C and W, which are usually observed in HVOF coatings. The hardness of WS coatings were lower than those of HVOF coatings, however, the relation of hardness-Co content of WS coatings showed the similar trend as that of the sintered WC-Co. The improvement of wear behavior was also observed in WS coatings.
Coanda-Assisted Spray Manipulation Flame Spray Demonstration
Authors: Smith B.L. , Allen D. 
Published: September 2022

Abstract
This paper will outline the results of a study underway at Utah State University aimed at developing technology to alter the direction and profile of thermal spray flows using the Coanda effect. Coanda-assisted Spray Manipulation (CSM) makes use of an enhanced Coanda effect on axisymmetric geometries through the interaction of a high volume primary jet flowing through the center of a collar and a secondary high-momentum jet parallel to the first and adjacent to the convex collar. The control jet attaches to the convex wall and vectors according to Coanda effect principles, entraining and vectoring the primary jet, resulting in controllable r - θ directional spraying. The basic turning effect was investigated in a fundamental experimental study. The results of the fundamental study were applied to the design of an add-on CSM attached to a Metco 2P powder flame spray gun.
Current Situation and Development Tendency of Thermal Spraying Materials in China
Authors: Yu Y. 
Published: September 2022

Abstract
The current situations of thermal spraying materials in China are described in this paper. The thermal spraying technology in China has a great progress over tens of years. More than one hundred varieties of material products are serving in thermal spraying industry now, which are grouped into three kinds: powders, wires and rods. And technologies for producing alloy or ceramic or composite powders, alloy or cored wires, and oxide ceramic rods are applied to large-scale production. Many research and development works on advanced materials for thermal spraying are carrying out in recent years. They show that the general tendencies of thermal spraying materials in China are composite or low-impurity component, ultrafine or nanosized microstructure, high properties, as well as specialized and systematized applications. Thermal spraying materials have great prospects in China.
Insulating and Sealing of SOFC Devices by Plasma Sprayed Ceramic Layers
Authors: Arnold J. , Ansar S.A. , Maier U. , Henne R. 
Published: September 2022

Abstract
Solid oxide fuel cells (SOFCs) are one of the options as auxiliary power units (APU) in transportation, e.g. in vehicles or in aircraft. In particular, metal supported SOFCs consisting of metallic frames and substrates coated with plasma sprayed functional layers have shown an excellent stability concerning redox cycling. In order to provide sufficient power, these single cells have to be assembled to stacks. To prevent short-circuiting the frame of each cell has to be electrically insulated from the neighbouring one. For that purpose a ceramic coating is applied on each metal frame by thermal spraying before it is brazed to other stack components. Such layers should at one hand show good wetting and adhesion to the silver based brazing materials. On the other hand it should maintain sufficient electrical resistance even at the fuel cell operating temperature. As the applied solder, which connects the cells and seals the gas manifold simultaneously, is an excellent electrical conductor, it is mandatory to prevent the brazing material from penetrating into the deposit. In this paper a description of the design and experiences with these plasma sprayed insulating layers is given.
APS-Triplex and LPPS-Thin Film as Advanced Plasma Spraying Technologies for Industrialization of SOFC Components
Authors: Gindrat M. , Refke A. , Damani R. 
Published: September 2022

Abstract
Reliable and economically efficient processes are necessary for the production of high quality coatings for solid oxide fuel cells (SOFC) applications in an industrial scale. In that perspective, Sulzer Metco developed several coating solutions through different processes adapted for each specific applications, in particular on metal supported cells (MSC). Diffusion barrier layers (DBL) using perovskite material, such as Lanthanum Strontium Manganite (LSM), is produced “state-of-the-art” as coating service by Sulzer Metco on metallic interconnects (IC) using the Triplex technology. The newly developed TriplexPro-200 having a long lifetime performance and specific features, like cascaded arc and 3-cathode torch, is the best candidate for producing high quality and reliable coatings in a mass production of SOFC functional layers. LPPS-Thin Film, on the other hand is the technology of choice to deposit very dense, thin and homogeneous layers on various substrates. Yttria stabilized Zirconia (YSZ) layers of 20-40 µm thickness have been deposited on thin metallic substrates (0.7 mm, 140 cm2) without producing any strong deformation of the substrate. Considering the dimension of the metallic substrate the coated cells present very good gas leak tightness performances between 2 and 8 Pa·m/s which is homogeneous on the substrate area. Moreover, LPPS-TF can also be used to produce very dense and thin LSM coatings on interconnects. In this case, LPPS-TF not only produces denser and thinner coatings but also becomes again competitive when considering the manufacturing of DBL for metallic ICs on a high production scale. This paper presents the current developments of these technologies in the domain of SOFC applications.
High Performance Solid Oxide Fuel Cells (SOFCs) Made by Atmospheric Plasma Spraying (APS)
Authors: Vaßen R. , Hospach A. , Hathiramani D. , Mertens J. , Haanappel V. , Vinke I.C. , Stöver D. 
Published: September 2022

Abstract
The potential of atmospheric plasma spraying (APS) technology has been investigated for the manufacture of anode, electrolyte and cathode of a solid oxide fuel cell. As substrates tape-casted or commercial available porous plates both made of a FeCr-alloy were used. The functional layers were applied by atmospheric plasma spraying, however, it turned out that screen printed LSCF cathodes performed better than thermally sprayed versions. Anode layers with high electrochemical activity could be produced by APS using separate injections of NiO and YSZ powders. The manufacturing of gas-tight electrolyte layers was a key-issue of the present development. With adequate processing conditions and advanced gun technology it was possible to produce highly dense ceramic coatings with a very low amount of micro-cracks and pores. These electrolytes gave high open cell voltages above 1 V corresponding to the low measured leakage rates (&lt;10-3 mbar*l/s) of the rather thin (&lt;50 µm) coatings. Additional layers have been applied to reduce the interdiffusion especially of species from the metallic substrates into the anode. These layers could significantly reduce degradation of the cells. SOFCs with a power density at 800°C well above 0.7 W/cm² could be produced by the developed technology.
An Analytic Hierarchy Process (AHP) Approach to Digitalize Expert's Knowledge and Experience for Obtaining High Quality Wear Protective Al2O3 by APS
Authors: Hirose S. , Kitahara S. , Sonoya K. , Ohmori A. , Mori K. 
Published: September 2022

Abstract
The analytic hierarchy process (AHP) has been widely used as one of decision-making method in economic, social, political and technological field, and for evaluating relative strength of preference quantitatively in decision making process. We think that AHP approach would be useful for analyzing and digitalizing expert’s skills, and for transferring to non-skilled people. In this presentation, we show the AHP approach to analyze a decision to select thermal spraying parameters for achieving high quality wear resistive Al2O3 film by atmospheric plasma spraying (APS). From the result of this study, the process of expert’s subjective thinking could be clear and understood for other person.
Comparative Analysis of Tribological Properties of Cermet Detonation Coatings
Authors: Ulianitsky V. , Shtertser A. , Zlobin S. , Smurov I. 
Published: September 2022

Abstract
Properties of detonation coatings from composite powders based on carbides are studied. The main focus is on tungsten carbide. Powders with carbide inclusions of different size ranging from a ten of microns down to the submicron level are analysed. Composites with cobalt binder content from 12 to 30 % and composite binders with chromium and nickel additions are studied. A comparative analysis between composites with chrome carbide and the complex titan-chrome carbide produced by self-propagating high–temperature synthesis is done. Powders are sprayed with a new generation detonation gun “Dragon” designed at Lavrentyev Institute of Hydrodynamics SB RAS. The apparatus is characterized by a high-precision gas supply system and a dosed localized powder feeding system. Computer control provides a flexible programmed readjustment of the detonation gases energy impact on powder particles thus allowing selecting the optimal for each material spraying parameters to form high-quality cermet composite coatings. Physical properties and functional performance of the obtained coatings are studied. Microstructure and microhardness analyses, adhesion/cohesion, abrasion, erosion and friction wear tests of the coatings are performed. It is found that the studied materials do not exhibit overwhelming advantages in performance compared with one another. Fore example, though composites with a great content of binder has a relatively low wear resistance, they exhibits the highest adhesion to the substrate while composites with titan-chrome carbide compared to tungsten carbide-based composites have higher dry friction and lower lubricated friction.