bluuebunny/crossref_metadata_2025_split huggingface dataset:
Stability of antenna support belts
Authors: Krasnoshchekov Yu. V. , Zapoleva M. Y. 
Published: January 2023

Introduction. The article deals with the issues of stability of compressed belts of lattice construction, as systems in the form of continuous rods consisting of panel elements. Currently, the estimated length of compressed elements is established by design standards for calculating stability without taking into account variability due to the influence of numerous random and systemic factors. This approach does not encourage the improvement of design solutions, the quality of their execution and the control of the structure. And most importantly, it does not allow to realize the reserves of the bearing capacity of structures laid down by the norms. The purpose of this study is to identify and substantiate the reserves of the bearing capacity of antenna supports of a lattice structure according to the criterion of stability of compressed belts.Materials and methods. It is shown that the values of the calculated length coefficient are set by norms with a margin, due, in particular, to ensuring the reliability of structural systems of compressible elements. It is proposed to consider the estimated length of compressed elements as a random variable. The problem of probabilistic estimation of the free (calculated) length of a centrally compressed element as a parameter of the critical force of loss of stability is solved. The possible normative and calculated values of the calculated length coefficient are given, ensuring the reliability of the calculation of compressed antenna support belts, adopted in the current design standards. To assess the variability of stability indicators, the task is to conduct experimental studies, in particular, with the measurement of vibration frequencies of full-scale structures. By controlling the variability indicators of the calculated length coefficient, it is possible to regulate not only reliability, but also the load-bearing capacity reserves provided for by design standards.Conclusions. The proposed approach to the calculation of stability allows to control the calculated values of the calculated length coefficient by controlling statistical variability (coefficient of variation). If there are available methods for measuring indicators, the approach described in the article to calculating compressed elements for stability can be an effective means and tool for improving design solutions, the quality of their execution and control of the structure.
It’s adu penalti man!: Understanding the translingual practices of an Indonesian family living in the US
Authors: Zakaria Faishal 
Published: January 2023

This study examines the kinds of translingual negotiation strategies practiced by an Indonesian family living in the US. This study involved a father and son, natives of Indonesia, who had been in the US for many years. The father and son usually mix and mesh English, Indonesian, and Javanese when communicating. Two kinds of data were collected; the daily talks between the father and son were audiotaped, and follow-up interviews with the father and member checking were used to triangulate the data. The data reveals that the father and son indeed practiced Canagajarah’s (2013b) four translingual negotiation strategies: invoicing, recontextualization, interactional, and entextualization. Additionally, the interview reveals some of the father’s goals with his son’s language learning and literacy in their mother tongue. DOI: 10.26905/enjourme.v7i2.8990
Mail Management Information System on The Institute of Research and Community Services of Islamic State University (LP2M UIN) Salatiga
Authors: Syujak Ahmad Rois 
Published: January 2023

Lecturers who apply for letters related to research and service to the community often have difficulty filing letters and take a long time. This is because the institute of research and community services of State Islamic University (LP2M UIN) Salatiga does not have a system to manage mail messages that are systematized and can be accessed quickly. The need to find a way to solve existing problems by providing a mail management information system (ESurat) program that can be used to handle the writing letter process carried out by lecturers. The Web-based mail management information system (ESurat) is a way to handle letter submissions by professors so that professors can obtain mail faster and be developed using waterfall methods. Using PHP programming languages, MySQL databases and CodeIgniter frameworks in the construction of a web-based mail management information system (ESurat). The research results that the application can be used to handle the letter submission process carried out by UIN Salatiga lecturers managed by the institute of research and community services of State Islamic University (LP2M UIN) Salatiga.
Kejadian nematodosis gastrointestinal pada monyet ekor panjang (Macaca fascicularis) di Pusat Studi Satwa Primata LPPM IPB
Authors: Rosyid Bahaudien , Darusman Huda Shalahudin , Retnani Elok Budi 
Published: January 2023

Monyet ekor panjang (Macaca fascicularis) sering digunakan sebagai hewan model dalam penelitian biomedis. Nematodosis umum ditemukan pada kelompok primata yang bukan manusia atau non-human primate. Nematodosis gastrointestinal dapat memengaruhi hasil penelitian atau berpotensi sebagai sumber penularan ke manusia (zoonosis). Penelitian bertujuan melakukan identifikasi tipe, menghitung tingkat kejadian dan derajat infeksi kecacingan nematoda gastrointestinal pada monyet ekor panjang di kandang penangkaran Pusat Studi Satwa Primata, Lembaga Penelitian dan Pengabdian kepada Masyarakat IPB (PSSP LPPM IPB) serta membandingkan dua metode pemeriksaan kuantitatif McMaster dan Kato-Katz. Sampel feses dari 24 ekor monyet ekor panjang diperiksa menggunakan metode flotasi sederhana, yaitu McMaster dan Kato-Katz. Sembilan (37,5%) dari 24 sampel terinfeksi oleh trichurid (20,8%), ascarid (12,5%), dan strongylid (4,2%), masing-masing dengan rataan derajat infeksi 833,3 ± 923,8; 32 ± 27,7; dan 12 ± 17 telur tiap gram tinja (TTGT). Tingkat infeksi namatodosis pada monyet ekor panjang berdasarkan kelompok umur dan jenis kelamin berturut-turut adalah pada bayi 50%, anak 50%, remaja 16,7%, dewasa 33,3%, jantan 33,3%, dan betina 41,7%. Tingkat kejadian dan derajat infeksi nematodosis gastrointestinal pada monyet ekor panjang menunjukkan kategori sedang hingga rendah. Hasil ini dapat dijadikan pertimbangan dalam manajemen pemeliharaan, penelitian biomedis, dan mitigasi risiko potensi penularan ke manusia.
Torture, Structural Violence and Migration
Authors: Perocco Fabio 
Published: January 2023

This essay highlights that torture has become a structural element of the migratory experience in most of the world, especially as a result of the worsening of the conditions of migration and the torture crisis. Considering several contexts (Central America-US, Balkans, North Africa), this essay examines the factors underlying such processes and points out that mistreatment of migrants is related to the tightening of migration policies and the escalation of institutional racism, which – with securitisation policies, politics of fear, hyper-detention, theories on the criminal law of the enemy – favour contexts permeable to violence towards migrants.
FAKTOR MEMPENGARUHI NIAT MENGGUNAKAN QRIS PADA SHARIA MOBILE BANKING SAAT PANDEMI COVID-19 (MODIFIKASI MODEL UTAUT 2)
Authors: Saibil Defi Insani , Sodik Fajar , Mardiah Andi Ainun 
Published: January 2023

Analisis faktor yang mempengaruhi niat dalam menggunakan QRIS dimasa pandemi Covid-19 merupakan tujuan dalam penelitian ini. Jenis penelitian ini menggunakan penelitian kuantitatif yang didukung data kualitatif. Ada dua fokus penelitian ini, pertama menguji faktor yang mempengaruhi dan mendorong niat untuk menggunakan. Kedua, melihat faktor lain yang mempengaruhi niat dalam menggunakan. Penelitian mengadopsi model modifikasi teori UTAUT 2. Pengumpulan data dilakukukan melalui survei menggunakan penyebaran kuesioner dengan pertanyaan terbuka dan pertanyaan tertutup. Jumlah responden dalam penelitian ini sebanyak 134 responden. Metode non-probability sampling dengan menerapkan teknik purposive sampling digunakan. Sedangkan teknik SEM-PLS digunakan pada analisis data, aplikasi WarpPLS 6.0 untuk uji hipotesis dan SPSS 26 untuk analisis deskriptif dan exploratory. Penelitian ini menunjukkan hasil bahwa sebanyak delapan hipotesis yang diajukan semuanya diterima sehingga mengindikasikan bahwa masyarakat memiliki niat yang baik dan merasa kemudahan menggunakan QRIS pada masa pandemi. Hasil dari penelitian ini diharapkan bisa menjadi masukan untuk industri perbankan syariah untuk lebih meningkatkan kualitas pelayanan QRIS mobile dalam hal transaksi keuangan secara digital.
Electric Machines with High Specific Power
Authors: Ivanov N. S. , Zhuravlev S. V. , Kharkina O. A. , Zdorova M. V. , Shirokov A. A. , Akhunov M. T. , Sosova D. D. 
Published: January 2023

Abstract
Specific power, defined as the ratio of output power to total mass, is one of the generally accepted figures of merit for electrical machines. Given the growing interest in electric aircraft, developers are trying to demonstrate a high value of this indicator for their products. This paper provides an overview of the projects of electrical machines with high power density, the use of which is promising in aircraft of various dimensions. Projects of the University of Nottingham, the University of Illinois, Siemens, Yasa, and others were considered. An analysis of their technical and technological characteristics and approaches to design, manufacturing, and testing is given.
CAMBIOS EN LA GEOPOLÍTICA Y OCUPACIÓN DEL TERRITORIO: PERÚ 2000-2020
Authors: JURADO NÁJERA Joel 
Published: January 2023

Con el Consenso de Washington desde 1990 se dio paso al predominio de las inversiones de las empresas transnacionales en la explotación privada de los recursos minero extractivos. Las empresas americanas y europeas adquirieron la mayoría de los yacimientos mineros y energéticos que se encontraban en manos del Estado peruano. Estas siguieron operando bajo el patrón de ocupación territorial tipo enclave, sin mayores encadenamientos con la economía regional ni de su entorno rural. Desde comienzos del presente siglo, la inversión china comenzó a adquirir las empresas mineras con mayor desarrollo tecnológico y potencial futuro, tejiendo a la vez la denominada Ruta de la Seda, sobre la base de corredores económicos transversales diversificando sus inversiones en diferentes líneas de actividad proyectando y modernizando la infraestructura multiviaria en las macroregiones norte, centro y sur conducentes a puertos globales que operarán en red en el litoral peruano del Océano Pacífico desctacando los ferrocarriles y las vías fluviales para la integración bioceánica con Brasil y Bolivia y el Atlántico
Temperature Measurements of Polymer Composite Flat Plates Coated with Aluminum-12Silicon
Authors: Therrien D. , McDonald A. , Mertiny P. 
Published: January 2023

Abstract
The temperature distribution of glass fiber-reinforced epoxy flat plates coated with a thin oxy-acetylene flame-sprayed aluminum-12silicon coating was determined experimentally. The composite plates were fabricated by filament winding. Following winding, but prior to and during curing, garnet sand was uniformly distributed on the glass fiber-reinforced epoxy plate surface. The sand roughened the surface such that there was adhesion of the aluminum-12silicon particles to the surface. A resistive heating wire was attached to the coated surface. Thermocouples were attached to the composite and coating surfaces to measure transient and spatial surface temperature distributions. The spatial temperature of the coating and polymer surfaces decayed uniformly throughout the coating-composite ensemble from the heating wire. It was also observed that the coating served to increase the surface temperature of the coating-polymer system compared to uncoated samples. This was attributed to the large thermal conductivity of the metal coating and the low thickness of the samples.
Microstructure Characteristics and Oxidation Behavior of Molybdenum Disilicide Coatings Prepared by Low Pressure Plasma Spraying
Authors: Niu Y. , Fei X. , Wang H. , Zheng X. , Ding C. 
Published: January 2023

Abstract
Molybdenum disilicide (MoSi2) has been applied as protective coating material on various substrates fabricated by different methods due to its good oxidation resistance at elevated temperature, relatively low density and coefficient of thermal expansion and high thermal conductivity. In this work, MoSi2 coatings were fabricated by low pressure plasma spraying technology (LPPS). Their morphology, composition and microstructure characteristics were intensively investigated by SEM, XRD, EDS and TEM. The oxidation behaviors of MoSi2 coatings were also explored. The results showed that the MoSi2 coating was compact with porosity less than 5%. Its microstructure exhibited typical lamellar character. The MoSi2 coating was made up of grains with irregular shapes and different sizes of 0.1-0.2 µm. It was mainly composed of tetragonal and hexagonal MoSi2 phases. A small amount of tetragonal Mo5Si3 phase formed and randomly distributed in the matrix of MoSi2. The MoSi2 coating exhibited excellent oxidation-resistant behavior at 1773K, which resulted from the continuous dense glassy SiO2 film formed on its surface.
Influence of Parameter Variations on WC-Co Splat Formation in an HVOF Process Using a New Beam-Cutter Device
Authors: Tillmann W. , Hussong B. , Priggemeier T. , Kuhnt S. , Rudak N. , Weinert H. 
Published: January 2023

Abstract
During the last 20 years, numerous scientists have studied the formation of thermally sprayed WC-Co coatings. Most of them focused on the direct connection between parameter variations and coating properties, such as the microstructure, wear or hardness. As the formation of single splats is the foundation for any thermal spray coating, this work focuses on the investigation of single splat morphologies. The aim of single splat interpretation is to determine the influence of different spray parameters on the morphological distribution of particles inside the flame. This distribution is indispensable to understand the formation of each coating layer during the process. Unfortunately, most of the methods presently used for generating single splats do not allow an assignment of each splat to its radial position in the flame. A method to create a footprint of a spray jet with an extremely short exposure time was used in this paper. The resulting field of splats enables the assignment of the splats on the specimen to their radial position in the cross-section of the spray jet. The footprints were analyzed by correlating the quantities and morphology of the splats to measurements of the spray jet properties and the splat’s radial position inside the jet.
Engineering HVOF-Sprayed Cr3C2-NiCr Coatings: The Effect of Particle Morphology and Spraying Parameters on the Microstructure, Properties and High Temperature Wear Performance
Authors: Poirier D. , Legoux J.-G. , Lima R. S. 
Published: January 2023

Abstract
Chromium carbide-based thermally sprayed coatings are widely used for high temperature wear applications. In these extreme environments at those temperatures, several phenomena will degrade, oxidize and change the microstructure of the coatings, thereby affecting their wear behaviour. Although it can be easily conceived that the Cr3C2-NiCr coating microstructure evolution after high temperature exposure will depend on the as-sprayed microstructure and spraying parameters, very little has been done in this regard. This study intends to develop a better understanding of the effect of spraying parameters on the resulting chromium carbide coating microstructure after high temperature operation and high temperature sliding wear properties. The microstructures of different coatings produced from two morphologies of Cr3C2-NiCr powders and under a window of in-flight particle temperature and velocity values were characterized through X-ray diffraction (XRD) and scanning electron microscopy (SEM). Sliding wear at 800°C was performed and the wear behaviour correlated to the spraying parameters and coating microstructure. Vickers microhardness (300 gf) of the coatings before and after sliding wear was also measured.
Development of the Particle Interface Bonding in Thermal Spray Coatings for Expanding High Performance Applications
Authors: Li Chang-Jiu , Yang Guan-Jun , Li Cheng-Xin 
Published: January 2023

Abstract
Thermally sprayed coatings are formed through the successive impact of molten droplets and/or semi-molten particles followed by flattening, rapid cooling, and solidification. Individual droplets flatten to form splats of several micrometers in thickness upon impact and result in the formation of a coating that has a lamellar structure with limited interface bonding. The inclusion of semi-molten particles in the coating modifies its microstructure. The bonding between particles dominates coating properties and performance. This review paper examines the bonding formation at the interface between thin lamellae in the coating. The effect of spray parameters on the bonding ratio is presented to reveal the main droplet parameters controlling bonding formation. It is shown that spray particle temperature dominates the bonding formation more than particle velocity. Significant increases in ceramic particle temperature are not possible due to the inherent characteristics of thermal spray processing; therefore, the bonding ratio is limited to a maximum of about 32%. On the other hand, it was found that through controlling the surface temperature of coating prior to molten droplet impact, the bonding at the lamellar interface can be significantly increased. Consequently, with the proper selection of deposition conditions and control of surface temperature, the bonding ratio of ceramic deposits can be altered from a maximum of 32% for a conventional deposit to the maximum of 100%. Such wide adjustability of lamellar bonding extends the applicability of plasma spray coatings to applications requiring different microstructures and properties. Moreover, this bonding control makes it possible to fabricate porous surfaces and structures through the deposit of surface-molten particles, to deposit high temperature abradable ceramic coatings, and to form super-hydrophobic surfaces. Furthermore, the ability to deposit coatings with complete interface bonding allows crystalline structure control of individual splats through epitaxial grain growth.
Casting Requirements on Light Metal Crankcases for Thermally Sprayed Fe-Based Bore Coatings
Authors: Ernst F. , Kube D. , Klaus G. 
Published: January 2023

Abstract
Since 2000, cast iron-liners have been replaced in several engine projects by Fe-based thermally sprayed coatings in the bores of a light metal crankcase. In contrast to cast in liners the linerless versions of these Al-crankcases are very demanding with regard to the porosity and tensile strength in the areas around the bores. The casting porosity has to be diminished to maximum pores smaller than 1mm² due to the roughening procedure, either mechanical roughening (MR) or high power water jet roughening (WR), in order to prevent either tool failure (MR) or widened pores (WR). At Nemak Dillingen these challenges are met by the Core Package Process (CPS), offering the advantages of a highly flexible casting design and a nearly unlimited choice of the cast alloy. These boundaries enable the production of lightweight crankcases made of the strong and creep resistant Al-Si-Cu based secondary alloy A319. The high quality of the cylinder bore surface is achieved by a carefully designed thermal household of the solidifying casting. The cylinder chill form a stable and sound shell in the very beginning of solidification, whereas feeding takes place from the sidewall structure of the crankcase. At the same time, specially designed chills for the bearing seat enable a very short solidification time, the resulting properties are crucial for highly loaded diesel engines. After casting and machining, the crankcases have been mechanically roughened and coated with 0.8 % C-Steel. The coatings and the interface between the coating and the casted Al-substrate have been investigated by means of light microscopy regarding the interlock between coating and substrate and the near-surface porosity of the cast metal.
Study of Delamination Induced by Laser-Drilling of Thermally-Sprayed TBC Interfaces
Authors: Guinard C. , Guipont V. , Proudhon H. , Jeandin M. , Girardot J. , Schneider M. , Berthe L. , Martin A. 
Published: January 2023

Abstract
The efficiency of aero-engines combustion chambers with thermal barrier coating (TBC) is improved when numerous cooling holes are laser drilled with inclined angles. However, during the laser drilling process, especially in the percussion mode, a detrimental crack can be generated at the TBC interface. Thus, each hole could be edged with a non-visible delaminated area underneath the ceramic top-coat. The present work is focused on the thorough study of the delamination induced by laser percussion drilling when interrupted drilling conditions are presented. Shallow angle drilling was applied on separated holes with 1 to 4 laser pulses respectively and various acute incident angles. Crack length was assessed by conventional metallographic preparation. A special experimental method was carried out in order to inspect the delaminated interface and the lateral edge of a semi-hole. This non-destructive assessment of the delamination of laser drilled TBC was complemented by a 3D imaging of a semi-hole using X-Ray microscopy. Results are presented with attention on both crack initiation and propagation during the laser percussion drilling of plasma-sprayed TBC.
Formation of Abradable Alumina Ceramic Coatings through Deposition of Semi-Molten Ceramic Particles by Flame Spray
Authors: Zou J. , Li C.-J. , Huo H.-B. , Chen B. , Li C.-X. , Yang G.-J. 
Published: January 2023

Abstract
High temperature gas turbines require ceramic abradable coatings for sealing to ensure high efficiency. In this study, a novel method is proposed to deposit porous ceramic coatings through deposition of ceramic spray powder particles in the semi-molten state. The commercially available alumina (Al2O3) powders were spheroidized and screened to a particle size range from 40 to 50 µm for spray deposition. Flame spraying was employed for coating deposition. During deposition, the substrate surface was kept at 500°C. The effect of melting degree of spray particles on coating microstructure was investigated by changing the flame power and spray distance. The porosity of flame-sprayed Al2O3 coatings was estimated by image analysis on coating cross-sectional microstructures. The results showed that porous Al2O3 coatings were successfully prepared with a porosity range up to 59% by flame spray. Moreover, spray parameters such as acetylene flow rate and spray distance have significant influences on the particle melting state, thus the microstructure and the porosity of the coating. With the decrease of acetylene flow rate and spray distance, the porosity of coatings increased due to the decrease of the melting degree of the sprayed particles. At a spray distance of 20 mm, when the acetylene flow rate was reduced from 400 to 200 L/h, the porosity increased from 37% to 59%. The results clearly demonstrated the feasibility to prepare porous abradable coatings of high porosity through surface-melted spray particles.