bluuebunny/crossref_metadata_2025_split huggingface dataset:
MENENTUKAN HARGA OPSI DENGAN METODE MONTE CARLO BERSYARAT MENGGUNAKAN BARISAN KUASI ACAK FAURE
Authors: ASTUTI PUTU WIDYA , DHARMAWAN KOMANG , SARI KARTIKA 
Published: September 2021

An option contract is a contract that gives the owner the right to sell or even to buy an asset at the predetermined price and period time. The conditional Monte Carlo is one of the several methods that is used to determine the option price which in the process uses random numbers with normal standard distribution. At the same time, the random number generator can be substituted by using a quasi-random sequence, as in Faure's quasi-random sequence. The aim of this study is to determine the contract price of the call option with the European type by applying the conditional Monte Carlo method. This method used the Faure quasi-random sequence and compared it with the method of Monte Carlo standard, Monte Carlo standard in using the quasi-random sequence of Faure, and conditional Monte Carlo. The results of this study showed that the call option calculated using the conditional Monte Carlo method using the quasi-random Faure sequence began to stabilize at the 5000th simulation for K = 32575 and K = 34725 and in the 10000th simulation for K = 33000 and K = 33950. Research also show that with the conditional Monte Carlo in using the quasi-random sequence of Faure is more stable. Therefore, it is obtained its real value faster than the Monte Carlo standard, Monte Carlo standard in using the quasi-random sequence of Faure, and conditional Monte Carlo. The MAPE value of conditional Monte Carlo in using the quasi-random sequences of Faure and the Monte Carlo standard is smaller than the Monte Carlo standard in using the quasi-random sequence of Faure, and conditional Monte Carlo. Therefore, it can be said to be more accurate when calculating the European type call option price at BBCA.JK stocks.
Minimalismo, afectos y escapes en el cine de Hong Sang-soo
Authors: Núñez Alberca Alejandro 
Published: September 2021

Un repaso por las películas más representativas del prolífico director surcoreano, que nos acercan a su particular estilo audiovisual. Entre situaciones sencillas y entornos cotidianos, con una trama aparentemente monótona y diálogos improvisados, muchas veces bajo los efectos del alcohol, se examinan las relaciones humanas de personajes que parecen repetirse, pero que son, finalmente, una proyección de su autor.
Penurunan Ompalitis pada Bayi dengan Prosedur Memandikan dan Perawatan Tali Pusat
Authors: Indaryani Indaryani , Supiyah Supiyah , Dharma Surya 
Published: September 2021

Â Infeksi tali pusat (ompalitis) adalah infeksi paling umum pada tali pusat bayi. Mandi dan perawatan tali pusat bayi sesuai dengan Prosedur Operasi Standar (SOP) adalah salah satu cara untuk mencegah ompalitis. Tujuan dari penelitian ini adalah mengetahui pengaruh penerapan standar mandi dan perawatan tali pusat dengan insiden ompalitis pada bayi. Metode penelitian kuasi eksperimental. Pengambilan sampel dengan teknik accidental sampling. Data dianalisis menggunakan uji Mann Whitney. Hasil penelitian menunjukkan penerapan standar mandi dan perawatan tali pusat berpengaruh signifikan terhadap kejadian ompalitis (p=0,03). Studi ini merekomendasikan agar memandikan dan perawatan tali pusat sesuai SOP sebagai cara mengurangi kejadian ompalitis pada bayi.Â
Antibiotic susceptibility pattern and risk factors associated with Acinetobacter and Pseudomonas infection at a tertiary care hospital
Authors: Sherchan Jatan Bahadur 
Published: September 2021

Background: Infection due to Acinetobacter spp. and Pseudomonas aeruginosa is a major worldwide concern these days. Antibiotic resistance and predisposing factors among the patients for acquiring such infection is a major challenge globally and in Nepal.
Objectives: To determine antimicrobial susceptibility pattern of Acinetobacter spp. and Pseudomonas aeruginosa isolates along with predisposing factors.
Methods: A total of 9,705 clinical samples were processed in this analytical cross-sectional study from December 2019 to November 2020. Antibiotic susceptibility pattern was determined following Clinical Laboratory Standard Institute guidelines. Patients’ information was obtained after informed consent.
Results: Acinetobacter spp. and Pseudomonas aeruginosa isolates were 92 (0.95%). Fifty-three (57.61%) samples were respiratory samples. Thirteen (20%) Pseudomonas aeruginosa and 18 (66.67%) Acinetobacter spp. were multidrug-resistant (MDR). Eight (12.31%) Pseudomonas aeruginosa strains and 13 (48.15%) Acinetobacter spp. strains were sensitive only to Colistin. Twenty-two (95.65%) prolonged hospital stayers had MDR bacteria compared to only nine (13.04%) non-prolonged hospital stayers (p-value <0.001). Sixteen (94.12%) of diabetic patients had MDR bacteria isolates in comparison to only 15 (20%) of non-diabetic patients (p-value <0.001). Thirty-one (33.69%) were elderly patients (age ?65 years) and 61 (66.31%) were of age less than 65 years old. Seventeen (54.84%) of elderly patients had MDR isolates whereas only 14 (22.95%) of patients who are not elderly had MDR isolates (p-value =0.0047).
Conclusion: Acinetobacter spp. and Pseudomonas aeruginosa strain were isolated from various samples. For effective treatment of infection by such organisms detailed microbiological diagnosis and drug susceptibility testing is needed along with identification of predisposing factors.
Implicación familiar en el bachillerato: una estrategia para favorecer la permanencia escolar
Authors: Infante Blanco Alejandra , Padilla González Laura Elena 
Published: September 2021

La familia y la escuela se configuran como dos espacios formativos por naturaleza, se espera que ambos colaboren a lo largo de los procesos escolarizados. Es amplia la literatura que corrobora la importancia de la relación familia-escuela durante la educación básica, sin embargo, son menos las investigaciones que abordan la temática desde la educación media superior o superior. Este trabajo presenta el desarrollo del concepto de implicación familiar en la educación y deja ver su importancia en el logro académico de los estudiantes de bachillerato, asumiendo que la familia sigue siendo importante por la etapa evolutiva que transitan la adolescencia, y por su papel estratégico para promover la permanencia escolar en este tipo educativo. Se retoma el modelo de Epstein en la clasificación de niveles de implicación familiar, así como en las prácticas familiares y escolares que dan lugar al logro académico de los estudiantes. A partir de lo anterior, se analizan algunas estrategias identificadas en la literatura que pueden ser de utilidad para las preparatorias mexicanas en la implicación de las familias en uno de sus mayores retos: la permanencia de los estudiantes en el bachillerato.
Cavitation Resistance of Coatings with a Metastable Austenite Structure
Authors: Korobov Yu.S. , Alwan H.L. , Filippov M.A. , Soboleva N.N. , Sirosh V.A. , Makarov A.V. , Estemirova S.Kh. 
Published: September 2021

Abstract
The effect of martensitic phase transformation on cavitation erosion resistance for a deposited layer prepared from a Fe-8Cr- C-1.5Al-Ti flux-cored wire of metastable steel was studied. A reference material of AISI 316L stainless steel was used as a substrate. Cavitation tests were performed using a modified ultrasonic tester. X-ray diffraction was used to examine the phase transformation before and after cavitation tests. Also, the eroded surfaces of specimens were investigated by optical microscope (OM), scanning electron microscope (SEM), and 3D optical profilometer. The cavitation results revealed that the deposited layer exhibited a resistance to cavitation erosion approximately 10 times higher than the AISI 316L steel due to the martensitic phase transformation occurring during the cavitation process. The phase transformation plays a main role to minimize the cavitation damage of specimen. This is due to the fact that it contributes to obstructing movement of dislocations and increasing the hardness as a result of the increased hardening on the surface.
Analytical and Numerical Modelling of Interfacial Stress Distribution of a Piezoresistive Coating Layer
Authors: Ogunbadejo Adekunle Sulaimon , McDonald André , Chandra Sanjeev 
Published: September 2021

Abstract
Thermally sprayed coatings can be used in structural health monitoring devices where the coatings can reveal defects in the real-time integrity of the component through changes in mechanical, thermal or modal properties during service. In this emerging application, the mechanical properties of the coating are strongly affected by the interfacial bond between the coating and the substrate. This paper presents an analytical study of the interfacial stress distribution based on piezoresistive-stress constitutive relation of a coating layer. Both a single layer coating- and a bilayer coating-substrate system were considered. An analytical solution of the interfacial stress was developed by solving a Fredholm-Volterra singular integro-differential equation of a coating-substrate model using Chebyshev polynomials. Numerical simulation was conducted to analyze the effects of geometric and effective material properties of the coating-substrate system on the interfacial stress distribution. It was found that the susceptibility of the piezoresistive layer to delamination primarily relies on thicknesses of the coating layers and the stiffness of the intermediary insulating layer and substrate.
Capturing the Influence of Jet Fluctuations on Particles in Plasma Spraying
Authors: Bobzin K. , Heinemann H. , O‘Brien A. 
Published: September 2021

Abstract
Instabilities and fluctuations of the plasma jet can have a significant influence on the particle in-flight temperatures and velocities, thus affecting the properties of plasma sprayed coatings. Presented in this paper is a novel method for capturing the effects particles are exposed to in the plasma spraying process. High-speed camera images of a plasma jet generated by a cascaded three cathode plasma generator (TriplexPro-210) are recorded for varying operating conditions. The images are processed using the inverse Abel transform. This transformation accounts for the fact that the images represent a 2-D projection and generates correct intensity values of the plasma jet images. These images are then combined with particle tracks resulting from CFD simulations of the plasma jet to match the particles path with the recorded plasma jet. This new method allows a precise description of the plasma intensity experienced by individual particles with a high temporal resolution. The results show a high sensitivity of the method, it can even detect the influence of the plasma jet originating from the cascaded triple arc plasma generator, which is considered as rather stable, on the particles.
Microstructure and Corrosion Properties of AlCoCrFeNi High-Entropy Alloy Coatings Prepared by HVAF and HVOF
Authors: Löbel Martin , Lindner Thomas , Mehner Thomas , Rymer Lisa-Marie , Lampke Thomas , Björklund Stefan , Joshi Shrikant 
Published: September 2021

Abstract
High-entropy alloys (HEAs) represent an innovative development approach for new alloy systems. These materials have been found to yield promising properties, such as high strength in combination with sufficient ductility as well as high wear and corrosion resistance. Especially for alloys with a body-centered cubic (bcc) structure, advantageous surface properties have been revealed. However, typical HEA systems contain high contents of expensive or scarce elements. Consequently, applying them as coatings where their use is limited to the surface represents an exciting pathway enabling economical exploitation of their superior properties. Nevertheless, processing conditions strongly influence the resulting microstructure and phase formation, which in turn has a considerable effect on the functional properties of HEAs. In the presented study, microstructural differences between high-velocity oxygen fuel (HVOF) and high-velocity air fuel (HVAF) sprayed coatings of the alloy AlCrFeCoNi are investigated. A metastable bcc structure is formed in both coating processes. Precipitation reactions are suppressed by the rapid solidification during atomization and by the relatively low thermal input during spraying. The coating resistance to corrosive media was investigated in detail, and an improved passivation behavior was observed in the HVAF coatings.
Electrical Properties of Half Heusler Coatings Depending on Spray Process
Authors: Darut Geoffrey , Portebois Axel , Vitu Ludovic , Planche Marie Pierre , Liao Hanlin , Misra Shantanu , Candolfi Christophe , Lenoir Bertrand 
Published: September 2021

Abstract
Microstructure and physicochemical properties of a thermally sprayed coating depend on the dynamics of the particles interacting with the spray jet. This is especially the case for electrical properties. In this study, different spraying processes were used to spray p-type and n-type half-Heusler powders. Thermoelectric powders, Hf20Zr75Ti05CoSb80Sn20 (p-type) and Hf60Zr40NiSn98Sb02 (n-type), were selected due to their interesting electrical properties. The spray processes were evaluated based on coating composition and mechanical property measurements. The only coatings of practical interest were those that were plasma sprayed and they were examined in detail to assess the effect of process parameters on coating properties.
The Influence of Diamond Addition to Ni-Al Powder on Oxidation Behavior of Ni-Al During Plasma Spraying for High Performance Oxide-Free Ni-Al Intermetallic Coating
Authors: Zhang Li , Wang Di , Liao Xian-Jin , Luo Xiao-Tao , Li Chang-Jiu 
Published: September 2021

Abstract
Ni-Al intermetallics have excellent corrosion and oxidation resistance, but their use in thermal spraying has been limited due to issues with in-flight oxidation. In this study, a novel approach is proposed to remove oxide from Ni-Al droplets in-flight by adding a deoxidizer (diamond) to the feedstock powder. A mixture of nickel, aluminum, and diamond powders was mechanically alloyed using a combination of cryogenic and planetary ball milling. The resulting Ni/Al/diamond composite powder was then plasma sprayed via the APS process, forming Ni-Al coatings on Inconel 738 substrates. Phase composition, microstructure, porosity, and microhardness of the coatings were characterized by X-ray diffraction, scanning electron microscopy, image analysis, and hardness testing, respectively. Oxygen content measurements showed that the coatings contained significantly less oxygen than coatings made from ordinary Ni/Al powders. In-flight particle temperatures were also measured and found to be higher than 2300 °C. The low oxygen content in the coatings is attributed to the in-situ deoxidizing effect of ultrahigh temperature droplets which are also oxide-free.
Exposure to Nanoparticles in Thermal Spraying — Vigilance Towards the Operator and the Outside Environment
Authors: Darut G. , Dieu S. , Meunier L. , Schnuriger B. , Vignes A. , Bihan O. Le , Morgeneyer M. , Lezzier F. , Devestel F. , Vion A. , Berguery C. , Roquette J. 
Published: September 2021

Abstract
This paper presents the results of an emission study on plasma spraying equipment and processes. Various measurements and samples were taken outside the spraying booth, at the operator level, and in the suction ducts upstream and downstream of the filtration equipment, creating a detailed profile of the aerosol emitted by the injection of NiAl powder in the plasma jet. The results show the existence of two families of particles, one ranging in size from 0.5 to 20 µm, the other of nanometric proportions. Concentrations of the larger particles were in the range of 600 cm-3 in the booth. As for submicron particles, concentrations of up to 107 cm-3 were observed but decreased significantly at the outlet of the filter system. The aerosol samples examined were dominated by a nanometric background of aggregates made up of oxidized nickel particles. Aggregates up to 100 nm in size, consisting of finer particles in the 5-20 nm size range, were found in high concentrations upstream of the filtration system. Great vigilance is thus required to protect equipment operators, an important part of which is placing dust collectors as close as possible to spraying booths connected by short, straight pipe runs.
Formation of Solid Solution and Metallic Nickel Phases During Suspension Plasma Spraying of Co Oxide and Ni Oxide
Authors: Jalilvand Vahid , Dolatabadi Ali , Moreau Christian , Mohammadkhani Saeed , Roué Lionel , Guay Daniel 
Published: September 2021

Abstract
The focus of this study is the formation of a solid solution and metallic nickel in the cobalt-nickel mixed oxide coatings during suspension plasma spray (SPS) deposition. The (Co,Ni)O solid solution is a potential material for inert anode applications in aluminum production. SPS coatings and in-flight collected particles are studied to gain further insight into the melting and mixing phenomena of the NiO and CoO powders as well as phase formation in the deposited coatings. Moreover, the role of suspension feedstock particle sizes on the microstructure of coatings is discussed. SEM, EDS and X-ray diffraction studies helped better understanding the formation of different crystalline phases within the as-sprayed coatings. It was found that the formation of metallic nickel is possible in the coatings. The results support the importance of substrate temperature on the formation of metallic Ni, so that keeping the substrate at low temperature results in an increase of the Ni content in the coatings. In this study, possible causes for the formation of metallic Ni during spraying are discussed.
Diffusion Simulation in SUS 430 Stainless Steel Interconnect with a MnCu Coating at 800°C
Authors: Yuan Kang , Geng Shujiang 
Published: September 2021

Abstract
(MnCu)3O4 spinel coatings are good candidates for Cr-positioning protection on stainless steel interconnect. The spinel coatings can be formed by sputtering MnCu followed by a hot oxidation treatment. To understand how the elements diffuse in the MnCu-steel system, a homogenization diffusion-couple model was built with consideration for Mn oxidation at the coating surface. According to the simulation, the diffusion of Fe from the steel substrate to the MnCu coating occurred while Cr was almost trapped under the MnCu coating. Cu-rich metallic phase formed under the Mn-oxide layer early in the process. The solid solubility of Cr in such Cu phase was very low which can function as a Cr blocker so that Cr external oxidation can be inhibited. The inward diffusion of Mn from the coating to the substrate was caused by the formation of a Mn concentration peak at the interface which, based on thermodynamic simulations, was probably due to the dissolution of Mn with Fe and Cr.
Fabrication of Cavitation Erosion Resistant Bronze Coatings by Thermal and Kinetic Spraying for Maritime Applications
Authors: Hauer M. , Gärtner F. , Krebs S. , Klassen T. , Watanabe M. , Kuroda S. , Krömmer W. , Henkel K.-M. 
Published: September 2021

Abstract
The present study compares needed prerequisites for the application of cavitation resistant bronzes by applying different coating techniques, such as cold spraying, HVOF spraying, warm spraying and arc spraying. By optimization to optimum cavitation resistance, the deposited coatings can increase the service life of ship rudders significantly and even serve as repair processes for ship propellers. The given overview aims to support the selection of processes when specifying the target properties to be set with regard to cavitation protection. By using high-pressure warm spraying and cold spraying, properties similar to those of cast nickel aluminum bronze were achieved, however at relatively high costs. In contrast, coatings produced by using HVOF and arc spraying have erosion rates that are only about four respectively three times higher as compared to cast nickel aluminum bronze, while far outperforming bulk shipbuilding steel. Hence, their properties should be sufficient for acceptable service life or docking intervals for ship rudder applications. Propeller repair might demand for better coating properties as obtained by cold spraying. With respect to costs, HVOF and arc spraying in summary might represent a good compromise to reach coating properties needed in application.
Low Temperature Soldering of Laser Structured and Metal Coated Fiber Reinforced Plastics
Authors: Gustke K. , Kupke D. , Drehmann R. , Lampke T. , Gebauer J. , Klotzbach U. , Lasagni A.F. 
Published: September 2021

Abstract
Assemblies containing fiber-reinforced plastic (FRP) and metal parts are typically fastened together via mechanical joining or adhesive bonding. Mechanical joining processes tend to weaken FRP parts by cutting fibers, while adhesives require long cures and often lead to inseparable material compounds. This paper evaluates a new joining method in which plastic parts are laser treated, then metallized via wire-arc spraying, and finally soldered to mating metal parts using a low-temperature process. Due to the effective increase in interface area resulting from laser structuring, bond strengths of up to 15.5 MPa can be achieved.
Effects of Composition on Antibacterial and Antiviral Properties of Suspension Plasma-Sprayed Hydroxyapatite/Titania Coating
Authors: Abir Mirazul Mahmud , Otsuka Yuichi , Miyashita Yukio 
Published: September 2021

Abstract
This study investigates the effect of composition on the antibacterial and antiviral properties of hydroxyapatite/titania composite coatings deposited by suspension plasma spraying. Hydroxyapatite is a bioceramic material used as a plasma-sprayed coating to promote osseointegration of femoral stems. TiO2 has promising photocatalytic activity and good efficiency in destroying bacteria, viral species, and parasites. Prior to coating, substrates were grit blasted, ultrasonically cleaned, and heated to enhance adhesion strength. The microstructure of the resulting coatings was then characterized using XRD and Raman spectroscopy. Test results indicated that SPS transformed Ti2O3 into TiO2 with mixed phases. Ti4O7 and Ti3O5 phases were also identified, which show photocatalytic activity due to oxygen vacancies. Antibacterial and antiviral tests were conducted as well.
Qualification of the Low-Pressure Cold Gas Spraying for the Additive Manufacturing of Copper-Nickel-Diamond Grinding Wheels
Authors: Tillmann W. , Zajaczkowski J. , Baumann I. , Schaak C. , Biermann D. , Kipp M. 
Published: September 2021

Abstract
Grinding wheels are usually manufactured by powder metallurgical processes, i.e. by moulding and sintering. Since this requires the production of special moulds and the sintering is typically carried out in a continuous furnace, this process is time-consuming and cost-intensive. Therefore, it is only worthwhile for medium and large batches. Another influencing factor of the powder metallurgical process route is the high thermal load during the sintering process. Due to their high thermal sensitivity, superabrasives such as diamond or cubic boron nitride are very difficult to process in this way. In this study, a novel and innovative approach is presented, in which superabrasive grinding wheels are manufactured by thermal spraying. For this purpose, flat samples as well as a grinding wheel body were coated by low-pressure (LP) cold gas spraying with a blend of a commercial Cu-Al2O3 cold gas spraying powder and nickel-coated diamonds (8-12 μm). The coatings were examined metallographically in terms of their composition. Afterwards, the grinding wheel was conditioned for the grinding application and the topography was evaluated. This novel process route offers great flexibility in the combination of binder and hard material as well as a costeffective single-part and small-batch production.