bluuebunny/crossref_metadata_2025 huggingface dataset:
Functional Coatings Made by Brazing
Authors: Rass I.
Published: September 2022

In principle, coatings made by brazing is a process variant of brazing which can be classified as high-temperature brazing. It is a thermal process which is carried out either without flux in a vacuum or under inert gas with tapes/slurries/pastes/powders with a liquidus temperature generally above 900 °C. In this process, no components are firmly connected to each other but brazeable materials are applied which, after the heat treatment process, produce a metallic, material-tight coating. The most commonly used filler matrix materials are nickel-based ones, cobalt, iron, copper-based ones or corresponding alloys. Hard materials are mixed in depending on the coating function. Carbides, silicides, borides, oxides, diamonds, CBn or hard material mixtures can be used as hard materials. Common industrial used hard materials are WC, CrC or NbC. Hard material proportions in the coating can be up to 80 Vol.%. Actual developments show contents up to 90 Vol.% and more. Depending on the application, layer matrix hardnesses are flexibly adjustable from 20-30 HRC to 62-65 HRC. The coating produced can therefore perform various functions. For this reason, they are also called functional coatings. For example, hard material particles introduced into the matrix can be firmly brazed onto the surface of the component and thus take on a wear protection or gripping function. Alternatively, worn components such as moulds or turbine blades can be recontoured by brazing suitable materials as tapes or slurries into the wear areas and then reworking them. The coatings are very dense and crack-free and are therefore also very suitable for corrosion protection, even at high temperatures. In contrast to deposit welding, the deposit-brazed coatings are relatively smooth and often do not need to be reworked or ground. The strength of high-temperature brazed hard material coatings can reach the strength of the base materials. This results in a highly stressable layered composite. 2D and 3D geometries can be coated both internally and externally. Coating thicknesses are usually ranging from 1.0 up to 4.0 mm. Minimum layer thicknesses of 0.05-0.1 mm up to 10 mm and more can be achieved. Recent developments also show the possibility of locally brazing on applied tapes or suspensions using laser energy without having to heat the entire component. By selecting appropriate morphologies of the starting powders for braze matrix materials and hard materials, the coating system can be specifically optimised and adapted for the respective application. In addition, work is being carried out on systems in which "signaling elements" are incorporated into the coating in order to record the condition of a surface during operation. For example, forces, wear or temperature. The lecture gives an overview of selected processes, materials and applications and an outlook on new developments.
Additive Manufacturing by Thermal Spray Deposition of Metals on 3D-Printed Polymer Substrates
Authors: Ramaraju R.g.v. , Chandra S.
Published: September 2022

Metals were deposited on components made by 3-D printing with polyvinyl alcohol (PVA), a water-soluble polymer. The polymer was then dissolved, leaving a metal layer whose surface topography was the negative of that of the polymer. This is a rapid and low-cost alternative to 3D printing directly using metal, but to succeed it is essential for the sprayed metal to adhere to the polymer substrate. Tests were done in which aluminum and copper were sprayed using a twin-wire arc spray system onto 3D printed coupons, 50 mm x 50 mm in size, made from polylactic acid (PLA), PLA mixed with metal (aluminum, copper) or carbon fiber, and PVA. Adhesion depended on substrate roughness (minimum 1-2 μm) and substrate temperature (above the glass transition temperature but below the melting temperature of the polymer). It was shown that surface features could be made with high resolution on metal components using this technique.
Fatigue Properties of Cold Sprayed Bell Metal
Authors: Kovarik O. , Daniel J. , Cizek J. , Kondas J. , Cech J. , Siegl J. , Singh R.
Published: September 2022

Mechanical and fatigue properties of cold sprayed (CS) Cu20Sn bell metal were tested in order to assess the potential applicability of the technology to repair impact areas of church bells. The CS bell metal was compared to its traditional cast counterparts, a fine-grained Cu22Sn bell metal seen in small bells, and a coarse-grained Cu20Sn seen in large bells. Similar to other CS metals, it was shown that both the strength as well as the fatigue crack growth rates at low loading are similar to the cast materials. The fracture toughness of the CS material was comparable with the finegrained Cu22Sn bell metal, while both were significantly lower than the coarse-grained Cu20Sn bell metal. The impact damage rate of the CS material determined by a periodic impact test was significantly higher than the (finegrained) cast material. Both materials showed a stabilized, very slow damage rate after the relatively fast initial crater formation. The results presented in this paper identify CS as a feasible restoration technology for church bells, and the introduced methodology presents a characterization method for quantitative description of bell metal impact damage.
Performance of Suspension Sprayed YSZ Thermal Barrier Coatings on Inconel 718 Substrates Produced by Laser Powder Bed Fusion
Authors: Toma F.-L. , Gruber S. , Selbmann A. , Tkachenko S. , Kunze O. , Zabransky K. , Leyens C. , Čelko L. , Tajmar M.
Published: September 2022

Additive Manufacturing (AM) processes offer geometrical freedom to design complex shaped parts that cannot be manufactured with conventional processes. This leads to new applications including aerospace propulsion systems where the Ni-superalloy based material has to withstand high operating temperatures. In this contribution, the influence of heat treatment and surface conditioning of the additively manufactured Inconel 718 substrates on the thermocycling performance of suspension sprayed YSZ coatings was investigated. The different surface conditions included as-built, sandblasted and milled substrate surfaces with and without heat treatment. YSZ coatings were applied using suspension plasma spraying (SPS) with commercial available suspensions. Thermal cycling tests (FCT) at 1100°C, 1300 °C, and 1500 °C were applied to coating systems until failure occurred. The microstructures of the samples were characterized before and after thermal cycling. The performance of the coatings was mainly influenced by the coating morphology and FCT test conditions and less by the state of the AM substrates. Columnar-like YSZ SPS sprayed coatings on AM Inconel 718 substrates seemed to be a promising candidate for rocket engine applications.
Study on the Microstructure Development in a Laser-Cladded Tantalum Layer
Authors: Yuan K. , Pi Z. , Pang X.
Published: September 2022

In this study, pure spherical Ta powders made by induced plasma sphero technique were used in the laser cladding process. The powders were sent into high-energy laser zone and were melted at the surface of a steel substrate to create a Ta layer. The microstructure development in the Ta layer was investigated in a scanning electron microscope. The results showed that the layer was basically dense with some pore/crack defects. In the layer, typical dendritic crystalline structures were formed. With the help of an energy dispersive spectroscope, Fe was detected in the Ta layer. The top surface had about 5% Fe while at the bottom of the cladded layer 15% Fe was detected. So, the diffusion of Fe upwards occurred. With the participant of Fe, the microstructure of the Ta layer was changed. Thermocalc software was used to simulate the phase constitution at different Ta-Fe compositions. The results by the simulation basically agreed with the experimental observations.
Effect of Nb Content on Structure and Properties of Martensitic Stainless Steel Laser Cladding Layers
Authors: Du K. , Huang E. , Pi Z. , Chen X. , Zheng Z.
Published: September 2022

Laser cladding is a technology that uses high-energy-density lasers to quickly melt and solidify alloy powder on the surface of the metal substrate to form a cladding layer with good performance. The alloy powder composition has a significant impact on the cladding layer performance, including hardness, wear resistance and corrosion resistance. In this work, the effect of Nb content on the microstructure types and phase precipitation rules in the martensitic stainless steel laser cladding layers was investigated through the thermodynamics software. The martensitic stainless steel cladding layers with different Nb content was fabricated on the 45# steel substrate by the laser cladding. The microstructure and element composition of the cladding layers were analysed by the scanning electron microscope (SEM) and the energy spectrum analyser (EDS). The hardness, wear resistance and corrosion resistance of the cladding layers were also discussed. The results show that the amount of Cr element in carbide (boride) gradually decreases, while the amount of Nb element in carbide (boride) gradually increases, with the increasing Nb element content from 0.6 wt.% to 2.2 wt.%. For the performance of the cladding layer, the increase in the content of Nb makes the hardness and wear resistance of the cladding layer increase first and then decrease, but the corrosion resistance gradually increases. Generally speaking, the comprehensive performance is better when the Nb element content in the cladding layer is about 1.4 wt.%. At this time, the microhardness of the cladding layer is about 780.00 HV0.2, and the self-corrosion potential is -350.87 mV.
Coating of Aluminium with High Deposition Rates Through Extreme High-Speed Laser Material Deposition
Authors: Koß S. , Vogt S. , Göbel M. , Schleifenbaum J. H.
Published: September 2022

In the past few years, the Extreme High-Speed Laser Material Deposition (EHLA) process has been used as a coating technology alongside conventional processes due to its unique process characteristics and is an economical and sustainable alternative to traditional technologies. The essential characteristic of the process is that the main energy is absorbed by the powder particles so that they reach the substrate surface in a molten state. Thereby, metallurgically bonded and dense wear and corrosion protection coatings are generated. This leads to significantly higher surface and deposition rates can be achieved in comparison to Laser Material Deposition (LMD), and heat-sensitive substrates can be coated. Moreover, in addition to this resource efficiency, the process is not only economically attractive but also sustainable. To reduce component weights as well as secondary energy consumption, aluminium has become an essential base material in most industrial sectors. Aluminium is not simple to process and the wear resistance is small due to the low hardness in comparison to widely used steels. Various technology solutions are currently being investigated for the coating of aluminium. The low melting temperature of aluminium (approx. 750 °C) poses a great challenge when coating with, for example, iron-based alloys. Another challenge for laser-based systems is the reflectance of aluminium in the wavelength range approx. between 1030-1070 nm of conventional laser beam sources. The high degree of reflection of aluminium is the reason why additive processing quiet challenging is. Therefore, for conventional laser-based processes, laser beam sources in other wavelength spectra, e.g. green or blue, are being developed to improve the processing of aluminium. Currently, commercially available multi-kW lasers in the visible light spectrum are still below the available power of IR beam sources. In the context of this study, the feasibility of coating aluminium using EHLA is investigated. A high power 8 kW IR disk laser of the TRUMPF company is used to determine the maximum possible deposition and surface rate.
Quality Assessment of Thermally Sprayed Stainless Steel Coatings Based on Polarisation Curves with 3.5% NaCl Gel Electrolyte
Authors: Grimm M. , Kutschmann P. , Pluta C. , Schwabe O. , Ernst K. R. , Lindner T. , Lampke T.
Published: September 2022

The development of thermal spray processes usually requires an analysis of the complex coating microstructure. In order to inspect critical areas of a coating, destructive testing methods such as the preparation of cross-sections are commonly used. In this work, the suitability of largely non-destructively measured polarisation curves for the quality assessment of thermal sprayed AISI 316L coatings is investigated. Therefore, a 3.5 % NaCl gel electrolyte was developed to prevent the corrosive medium from infiltrating the porous and micro-cracked microstructure characteristic for thermal sprayed coatings. In addition, a measuring cell based on the 3-electrode arrangement was designed to simplify the setup, reduce the measurement time and enable mobile measurements directly on the component surface at a later stage of development. The effects of process-related differences in the microstructure of HVAF and APS AISI 316L coatings on the polarisation curve was investigated by determining the corrosion current density. The microstructure of the AISI 316L coatings was analysed by optical microscope, SEM and EDS, focussing on the porosity and oxide content. The results clearly show that the potentiodynamic polarisation curves of the AISI 316L coatings differ significantly depending on the spray process used and microstructure created. Even small changes in the oxide content within a coating can be detected. Therefore, electrochemical measurement methods using gel electrolyte offer an interesting opportunity to evaluate the quality of thermal sprayed AISI 316L coatings in a largely non-destructive manner.
Dynamic Impact Wear Analyses of Selected Cobalt Based HVOF Sprayed Coatings
Authors: Houdkova S. , Duliskovic J. , Daniel J.
Published: September 2022

Impact testing appears as a most promising tool for gaining information on coating behavior in load-bearing applications. During dynamic impact test an indenter impacts successively the surface of the coating with constant force and frequency. The deformation of the coated specimen during impact testing is affected by the mechanical properties of both the substrate and the coating. Varying the impact load and the number of impacts, the evolution of coating surface deformation and contact fatigue failures can be observed. In the paper, the influence of dynamic impact load and number of impacts on the resulting impact crater volume and morphology is analysed, and the interpretation of the results in form of Wohler-like dependance is suggested and demonstrated on two types of HVOF sprayed Co-based alloy coatings. The low-number impact craters evolution and subsurface cracks propagation of HVOF sprayed Co-based alloy coatings is analyzed in more detail, by means of 3D optical microscopy and SEM. The results showed, that the higher ability to deform plastically increased the coatings dynamic impact fatigue lifetime. The cracks, responsible for coatings destruction, spread predominantly along the intersplat boundaries in the pile-up area.
Tungsten-Steel Functionally Graded Coatings for Nuclear Fusion Applications Manufactured by Cold Gas Spraying
Authors: Mauer G. , Rauwald K.-H.
Published: September 2022

In nuclear fusion reactors, the first wall is the name given to the surface which is in direct contact with the plasma. A part of it is the divertor which is a device that removes fusion products from the plasma and impurities that have entered into it from the vessel lining. It is covered with water cooled tiles which have to withstand high temperatures and high heat fluxes. Moreover, resistance to neutron bombardment, low tritium absorption and low hydrogen permeation are additional demands. One materials concept under research is the application of a Reduced Activation Ferritic Martensitic Steel (RAFM) as a structural material with a tungsten protective coating. Since there is a considerable thermal mismatch between, a functional graded materials (FGM) concept was proposed. As the formation of undesired intermetallic Fe-W phases as well as oxidation should be avoided, cold gas spraying was chosen as manufacturing process. Two powder blends of EUROFER97 RAFM steel and a fine tungsten powder cut on the one hand and a coarser one on the other hand were tested in different ratios. The coatings were characterized with respect to their porosity and surface structure. Furthermore, the deposition efficiencies for steel and tungsten were determined each. It turned out, that the deposition process is a complex mixed situation of bonding and erosion mechanisms as the deposition windows of these very different materials obviously diverge. Thus, a lower working gas temperature and pressure was advantageous in some cases. Unexpectedly, the coarser tungsten powder in general enabled to achieve better results.
Additive Manufacturing Feasibility of WC-17Co Cermet Parts by Laser Powder Bed Fusion
Authors: Papy K. , Sova A. , Borbely A. , Staerk J.-M. , Favre J. , Roulon Z. , Sijobert J. , Bertrand P.
Published: September 2022

Cermets are composite materials consisting of a ceramic reinforcement and a metal matrix. Conventional tungsten carbide cermet parts containing a cobalt matrix phase are mainly produced by powder sintering. Laser Powder Bed Fusion (L-PBF) is an additive manufacturing technology widely applied for direct fabrication of metal functional parts with complex geometry. The present paper deals with the feasibility study of additive manufacturing of cermet parts by L-PBF using WC-17Co powder. The results showed that parametric optimisation of the L-PBF process allowed the production of solid WC-17Co part. Structural analysis revealed the presence of significant porosity (1.41%) and small-scale cracks in the as-built samples. Post-processing, such as HIP (Hot Isostatic Pressure) significantly improved the structure of manufactured parts. The porosity after HIP was very low (0.01%) and phase analysis revealed that the samples after HIP did not contain the fragile W2C phase. Abrasive wear tests showed that the wear resistance performance of additively manufactured parts was comparable to a reference produced by powder sintering. High values of hardness (around 1100 HV30) were observed for the as-built and HIP samples. The study successfully demonstrated the possibility of manufacturing wear-resistant cermet parts by L-PBF.
Correlation Between Process Parameters and Particle In-Flight Behavior in AC-HVAF
Authors: Bobzin K. , Heinemann H. , Jasutyn K.
Published: September 2022

A computational fluid dynamics model for understanding the HVAF process and the influence of the process parameters on the particle flight properties is investigated. Achieving this objective involves a novel approach to modeling the HVAF process with pressure inlet boundary conditions and integration of the mixing chamber. The study comprises the prediction of the flow fields described by a set of equations consisting of continuity, momentum, energy, and species transport. These equations are then solved with realizable k-ε turbulence model, a two-step chemistry model and eddy dissipation model to simulate the combustion reaction. Consequently, the interaction between the CoNiCrAlY alloy particles and the flow is modeled using a Lagrangian approach considering the forces acting on the particles and the heat transfer. The results show that the combustion chamber pressure is mainly affected by the compressed air and propane parameters. Furthermore, the flight behavior of the smaller particles is significantly influenced by the gas flow, while the larger particles tend to maintain their momentum and energy. Through the simulation model, an in-depth process understanding of the HVAF process can be achieved. More importantly, the model can be used as a tool for efficient process development.
TFRS 9 UYGULAMASININ TÜRK BANKACILIK SEKTÖRÜNDE KARŞILIK AYIRMA DÜZEYİNE ETKİSİ
Authors: GÜLHAN Ozan , AKTAŞ Melike
Published: September 2022

Bu çalışmanın amacı 1 Ocak 2018 tarihinden itibaren zorunlu uygulamanın başladığı Türkiye Finansal Raporlama Standardı (TFRS) 9-Finansal Araçlar Standardının Türk bankacılık sisteminin karşılık ayırma düzeyine olan etkisinin ortaya konulmasıdır. Bu çerçevede, Türkiye’de 2017 ve 2018 yıllarında faaliyet gösteren ve bu dönemde takipte kredisi bulunan 25 bankanın yıllık finansal tablolarından ve bağımsız denetim raporlarından alınan verilerle bankacılık sektöründe TFRS 9 uygulamasının zorunlu ve ihtiyati kredi zarar karşılıklarına etkisi incelenmiştir. Her iki karşılık tutarının da uygulama sonrası artış gösterdiği sonucuna ulaşılmıştır. Bu sonuca ek olarak kredi zarar karşılıklarının aktife oranının da arttığı yönünde anlamlı sonuçlar elde edilirken, ayrılan ihtiyati karşılıkların da arttığı tespit edilmiştir.
Pendekatan Teknik dan Taktik: Pengaruhnya terhadap Keterampilan Bermain Futsal
Authors: Festiawan Rifqi
Published: September 2022

This study aims to determine the effect of the Technical approach and tactical approach to the level of futsal playing skills. This research is experimental. The population used is the futsal UKM participants in FIKES Unsoed, totaling 40 people. The sample used in this study was 40 students with a sampling technique that is a total sampling. Data collection techniques in this study used the test. The instrument used in this study was a futsal playing skills test. Data analysis techniques using t-test. The results of this study indicate that there is a significant effect of the practice of a technical approach to futsal playing skills with a Sig (0.002). When seen from the average pretest of 49.05 and the average posttest of 43.01, the Mean Difference figure of 6.04 is obtained, this shows a better chance of 27.25%, the effect of the tactical approach exercise on futsal playing skills stated to have an influence significant with Sig (0,000). When seen from the average pretest of 49.18 and the average posttest of 42.65, a Mean Difference figure of 6.53 was obtained, this indicates that the change is better at 29.36%. Whereas from the results of the independent-t-test it was found that there was no significant difference between the training methods of the Technical and tactic approaches in improving futsal playing skills as indicated by the Sig value (0.890). Conclusion, there is no significant difference between the effect of training using a technical approach and tactics on futsal playing skills

 

Keywords: Tactic and Technical Approaches, Skills, Futsal.
Koordinasi Mata-Kaki dan Kelincahan terhadap Kemampuan Dribbling Sepakbola
Authors: Marta Ibnu Andli , Oktarifaldi Oktarifaldi
Published: September 2022

This study aims to reveal the effect of eye-foot coordination variables and agility on dribbling ability. This research method is a quantitative method using regression analysis. The population in this study were all SSB Balai Baru Padang players. The sampling technique was carried out by proportional random sampling, with a total sample of 32 people. Data were collected using The Arrowhead Agility Test to measure agility, Kick the Ball to the Target to measure eye-leg coordination, and to measure dribbling ability used The Short Dribbling Test. The results of the study and data analysis showed that: (1) Eye-Foot Coordination had a direct and significant effect on dribbling ability, the value of sig = 0.026 <0.05 was obtained. (2) Agility has a direct and significant effect on dribbling ability because the sig = 0.000 <0.05 (3) Eye-Foot Coordination and Agility simultaneously affect dribbling ability with a Sig value of 0.000 <0.05 and Y '= 6,117 + 0,316X1 + 0,562X2. In conclusion, there is a significant influence between eye-foot coordination and agility simultaneously on the dribbling ability of Football School players.

Keywords: Eye-Foot Coordination, Agility, Dribbling Ability
Evaluasi Program Pembinaan Prestasi Bulutangkis di Klub Persatuan Bulutangkis Jaya Mandiri
Authors: Remora Hengky , Firlando Rais
Published: September 2022

This study aims to: 1) evaluate the background and objectives of the coaching program, 2) evaluate human resources, infrastructure and funds, 3) evaluate program implementation, coordination, 4) evaluate the results achieved and welfare This research is a survey research using evaluation the CIPP model program. The research subjects included administrators, coaches, athletes, parents of athletes, the community around the club. The technique of collecting data through 3 ways, namely by (1) interviews, (2) observation (3) documentation. The source of the data studied was the PB Jaya Madiri club, Lubuklinggau City, South Sumatra Province. The analysis technique used is qualitative data analysis with four stages: data collection, data reduction, data presentation, drawing conclusions. The results of this study are 1) the badminton sport coaching carried out by the club is in accordance with the background and program objectives. 2) badminton sports coaching in the club has good and quality human resources, supported by infrastructure and insufficient funds, 3) badminton coaching in clubs which consists of aspects of program implementation and coordination is running well. 4) badminton coaching in the club is a result of the decreasing achievements achieved by athletes, while the welfare category is less. In conclusion, the badminton sport coaching carried out by PB Jaya Mandiri club is appropriate, has good and quality human resources (HR), supported by the availability of adequate infrastructure but limited funds that reduce the achievement of PB Jaya Mandiri club.

Keywords: Badminton, Evaluation, Coaching, Programs
Penerapan Latihan Shuttle Run pada Atlet Lari Jarak Pendek di Club Linggau Runners
Authors: Fransiska Amanda , Suhdy Muhammad , Syafutra Wawan
Published: September 2022

This study aimed to determine the application of shuttle run training to short-distance runners at the Linggau Runners club. This research method is quantitative. The data collection technique used a test, namely the initial test and the final test to determine the improvement of short-distance running ability. The analysis technique uses the z test. The collected data were analyzed using the z-test at a significant level of = 0.05. The results showed that the average increase in short-distance running athletes was 6.50 and based on the test criteria zcount 10.16 > ztable 1.64 was declared increased. In conclusion, the ability of athletes to run short distances after the shuttle run exercise was applied significantly increased.

Keywords: Shuttle Run, Short Distance Run
Evaluasi Pembinaan Prestasi Tenis Lapangan
Authors: Maulidin Maulidin , Syah Herman , Wibawa Elya
Published: September 2022

This study aims to evaluate the performance development of Mataram City PELTI tennis athletes both exogenously and endogenously from athletes, coaches, facilities, and infrastructure as well as the level of readiness of Mataram City PELTI athletes. This research method is descriptive with the survey method. The instrument used is a questionnaire consisting of 80 questions with a Guttman scale. The results of the research of the administrators and trainers of the Mataram City Pelti seen from exogenous factors fall into the "Good" category. Meanwhile, endogenous factors fall into the "moderate" category. And in terms of athletes seen from exogenous factors included in the "medium" category. Meanwhile, the endogenous factors are in the "Good" category. In conclusion, the achievement development of the Mataram City PELTI tennis field based on the point of view of the administrators/coaches and athletes is in the "medium" category.

Keywords: Evaluation, PELTI Mataram City
Persepsi Guru-Guru Sejarah SMA N 2 Kota Payakumbuh terhadap Implementasi Kurikulum 2013
Authors: Meri Destel
Published: September 2022

This study aims to determine the perception of history teachers of the implementation of the 2013 curriculum in history subjects. This type of research is descriptive evaluation. From the results of the study it can be seen that in general the teacher's perception of history is positive. Although there are still shortcomings, the shortcomings will be covered over time. The conclusion of this research This is said to be positive because the 2013 curriculum according to the teacher is in accordance with the demands of his era where students are required to be more active and the task of the teacher is only as a facilitator using a scientific approach, in addition to the higher appreciation of history marked by added hours for historical subjects, which are usually only 2 hours a week in the 2013 curriculum into four hours of study and history is also grouped into two namely compulsory history which learns about Indonesian history and history of specialization ie for students who choose the Social Sciences program. Keywords: Perception, Teacher, Kurukulum 13
Perencanaan Kawasan Wisata Jelajah Alam
Authors: Yusuf Ramdan
Published: September 2022

The purpose of this research is to identify the planning of natural roaming tourism areas in Labengga Village, Galang District. The research method used is architectural design method by identifying data, both primary data and secondary data. The research procedure consisted of a ground tour, mini tour, and interviews. The results showed that based on the study of the planning approach, the location approach, the circulation concept, the parking concept, the concept of outdoor space, as well as structure and utility, the development of Labengga Village Nature Exploration is expected to be able to attract domestic and foreign tourists. The conclusion of this research is that the planning of a natural roaming tourism area in Labengga Village is a facility that offers an interesting function that contributes to a better environmental quality, especially in Tolitoli Regency.
New species of Eulophidae from the Republic of Moldova (Hymenoptera)
Authors: Kostjukov V.V. , Tuzlikova A.V.
Published: September 2022

Two new species of the genus Baryscapus Förster, 1854 (B. moldovicus sp. n. and B. andriescui sp. n.) and one species of the genus Aprostocetus Westwood, 1833 (A. grahami sp. n.) are described from the Republic of Moldova. The hosts of all the new species are larvae of Curculionidae. Larvae of this coleopterous family were not recorded earlier as hosts for the genera Baryscapus and Aprostocerus in the Republic of Moldova.
Orden político y corrupción en Nueva Galicia: el caso de Santiago de Vera, presidente de la Audiencia de Guadalajara, 1593–1605
Authors:   Universidad Autónoma de Aguascalientes, González Esparza Víctor
Published: September 2022

This article offers a reflection on the political order and corruption in Nueva Galicia through the case of Santiago de Vera, president of the Audiencia of Guadalajara between 1593 and 1605. En order to do this, I present new readings of the available textual sources, such as the visit of Judge Paz de Vallecillo and Vera's own letters to the Council of the Indies. Hence, I analyze the subject, not from the difference between the public and the private – typical of the modern Staten – but from the negotiation between the different instances, especially in terms of maintaining the confidence of the Crown and, in some cases, of the population itself.
Sudan after Omar al-Bashir: A territory of instability
Authors: Denisova Tatyana S.
Published: September 2022

Sudan has a long history of civil wars and conflicts, much of which occurred during the 30-year (1989-2019) rule of Omar al-Bashir. The crisis in the Arab world, which came to be known as the “Arab Spring” and manifested itself in the early 2010s in major political upheavals in North Africa, did not spare Sudan, which has experienced several waves of popular protests over the past decade. The political situation in this country has noticeably worsened due to the loss of most of the oil fields as a result of the division of Sudan in 2011 into two states - the Republic of Sudan (RS) and the Republic of South Sudan (RSS). While mutinies by soldiers and officers were a common occurrence in the RS, it was the mass protests in late 2018 and early 2019, organized by the civil opposition and dubbed the “December Revolution” that provoked the military coup in 2019, which resulted in the overthrow of the long-lived president. However, the establishment of a transitional military-civilian government did not resolve the numerous contradictions in Sudanese society - between the army and civil society, individual security agencies, the ruling coalition and the leaders of the rebel movements, with whom a peace agreement was signed. Political instability was exacerbated by economic problems associated with the COVID-19 pandemic, and on October 25, 2021, another military coup took place, which, however, was not accompanied by regime transformation or significant changes in the composition of the ruling group, but allowed the military to extend the transition period and delay the transfer of supreme power in Sudan to civilians. Meanwhile, the intensity of military and political contacts between the Russian Federation and Sudan created a solid foundation for the expansion of bilateral relations, which continued to develop after the ouster of Omar al-Bashir.
Factors influencing the perception of corruption (a multilevel analysis in Africa)
Authors: Toklo Sewordor
Published: September 2022

Many developing countries suffer high levels of corruption, which contributes to the divergence in economic development between more developed and developing countries. Corruption perceptions play a key role in forming a culture that is more or less tolerant of corruption, which contributes to its persistence. Individuals who have high perception of corruption believe that bribes must be paid. Customers will be more likely to accept a bribe if they believe many people pay bribes. The importance of this research is that it contributes to the micro-level research tradition by providing a deeper understanding of the factors that influence corruption perception.
What factors influence the perception of corruption? I conducted an empirical analysis using 2017 Afrobarometer survey data, focusing on 34 democratic African countries. The study finds that those who are relatively poor are more likely to have a high perception of corruption and develop an unfavorable view of corruption than those with high income. The study also provides the potential mechanisms involved in the perception of corruption, finding that individuals with high access to information through the media, and higher education have a higher perception of corruption.
Where tradition meets science: microbial diversity and bioactive compounds in Armenian fermented milk products
Authors: Gooch Kassandra , Martirosyan Danik
Published: September 2022

Armenia has a rich history of medicine and fermented foods. Fermented milk products are enjoyed both as a gustatory pleasure and a digestive remedy. Matsun is a traditional Armenian fermented milk product with historico-cultural roots in ancient subsistence and medical practices. Unlike commercial yogurt, it is made through serial inoculation and consists of a large microbial diversity honed through centuries of human selection. Also made from matsun is choratan, a long- keeping dried version of matsun that can be reconstituted into a creamy base. Narine is the commercial name of Lactobacillus acidophilus INMIA 9602, a bacterial strain endemic to the microbiome of Armenian newborns that is often reconstituted in milk and used as a medical food. Both choratan and Narine have been used in clinical trials for the management of symptoms related to gut dysbiosis. The review of cell cultures and animal trials revealed matsun as a rich source of probiotics with antimicrobial, antifungal, and radioprotective activity due to the peptides released and protease resistant bacteriocins produced. Clinical studies are needed to confirm the effects of combined strains in the human microbiome and establish dosages. Choratan as an isolated strain from matsun showed some effect on microbiome imbalance, but more studies are needed to confirm the results. Narine is well-studied in several preclinical and small clinical trials and accepted as a medical food. For future functional food consideration, replications of clinical trials, and large scale epidemiological and aftermarket studies are needed.Keywords: Matsun, Choratan, Narine, History of Armenian Medicine, functional foods, bioactive compounds, Lactobacillus acidophilus INMIA 9602
Comprehensive study of the rheological status and intensity of oxidative stress during the progression of type 2 diabetes mellitus to prevent its complications
Authors: Chkhitauri Lela , Sanikidze Tamar , Giorgadze Elene , Asatiani Ketevan , Kipiani Nana , Momtselidze Nana , Mantskava Maka
Published: September 2022

BACKGROUND: Prevention of Type 2 diabetes mellitus (T2DM) requires a modifying effect on the pathological processes inducing the β-cell dysfunction. OBJECTIVES: the comprehensive study of the violation of rheological parameters in patients with different stages of diabetes and identification of possible links between these alterations with the intensity of the oxidative stress in the patient’s body. METHODS: 60 patients with IR, prediabetes, T2DM and healthy volunteers were included. Full range of the rheological parameters of the patients’ blood - the indicators of erythrocytes aggregation index (EAI), the relative deformability of the erythrocytes membranes (ERDI), blood plasma viscosity (BPV), and oxidative stress intensity (OSI) were examined. RESULTS: In patients with insulin resistance (IR), prediabetes, and T2DM the ERDI was statistically significantly lower and BPV - higher compared to control; a significant increase in EAI was detected in the patient group with prediabetes and T2DM compared to the control. CONCLUSION: The level of rheological disorders in patients increases with the increase of the level of carbohydrate metabolism disorders and intensity of oxidative stress and reaches a maximum during manifested diabetes. Diagnosis of hemorheological disorders and OSI in T2DM can serve as an early marker of target organ damage possibility.
Argument Schemes for Factor Ascription
Authors: Bench-Capon Trevor , Atkinson Katie
Published: September 2022

Reasoning with legal cases by balancing factors (reasons to decide for and against the disputing parties) is a two stage process: first the factors must be ascribed and then these reasons for and against weighed to reach a decision. While the task of determining which set of reasons is stronger has received much attention, the task of factor ascription has not. Here we present a set of argument schemes for factor ascription, illustrated with a detailed example.
Stability and Relevance in Incomplete Argumentation Frameworks
Authors: Odekerken Daphne , Borg AnneMarie , Bex Floris
Published: September 2022

We explore the computational complexity of stability and relevance in incomplete argumentation frameworks (IAFs), abstract argumentation frameworks that encode qualitative uncertainty by distinguishing between certain and uncertain arguments and attacks. IAFs can be specified by, e.g., making uncertain arguments or attacks certain; the justification status of arguments in an IAF is determined on the basis of the certain arguments and attacks. An argument is stable if its justification status is the same in all specifications of the IAF. For arguments that are not stable in an IAF, the relevance problem is of interest: which uncertain arguments or attacks should be investigated for the argument to become stable? We redefine stability and define relevance for IAFs and study their complexity.
Polemicist: A Dialogical Interface for Exploring Complex Debates
Authors: Lawrence John , Visser Jacky , Reed Chris
Published: September 2022

In this paper, we present Polemicist 2, a dialogical interface for exploring complex debates from the BBC Radio 4 programme The Moral Maze. Polemicist allows the user to interact with software agents representing the participants in the original programme. The software enables the user to explore the topic as they wish, asking questions to dive deeper on the areas that interest them most.
A Note of Generalization of Fractional ID-factor-critical Graphs
Authors: Zhou Sizhong
Published: September 2022

In communication networks, the binding numbers of graphs (or networks) are often used to measure the vulnerability and robustness of graphs (or networks). Furthermore, the fractional factors of graphs and the fractional ID-[a, b]-factor-critical covered graphs have a great deal of important applications in the data transmission networks. In this paper, we investigate the relationship between the binding numbers of graphs and the fractional ID-[a, b]-factor-critical covered graphs, and derive a binding number condition for a graph to be fractional ID-[a, b]-factor-critical covered, which is an extension of Zhou’s previous result [S. Zhou, Binding numbers for fractional ID-k-factor-critical graphs, Acta Mathematica Sinica, English Series 30(1)(2014)181–186].
Tea Consumption Is Associated with Reduced Cognitive Decline and Interacts with Iron Intake: A Population-Based Longitudinal Study on 4,820 Old Adults
Authors: Sukik Layan , Liu Jianghong , Shi Zumin
Published: September 2022

Background: Previous studies suggest a positive effect of tea intake on cognition. Additional micronutrients that may moderate this association was not previously examined. Objective: To examine the association between tea consumption and cognition and explore the interaction between tea consumption and iron intake. Methods: Data from the China Health and Nutrition Survey between 1997 and 2011 was used. 4,820 individuals (≥55 years) were included in the analyses. Measurement of cognitive function was conducted in 1997, 2000, 2004, and 2006. Tea consumption was self-reported. Food intake was assessed by 24-hour dietary recalls of three consecutive days during home visits between 1997 and 2011. Multivariable mixed linear regression and logistic regression was used to assess the association. Results: Tea consumption was associated with reduced global cognitive function decline. In fully adjusted models, regression coefficients (95% CIs) for those who consumed 0 cups/day,<2 cups/day, 2–3.9 cups/day, and≥4 cups/day of tea were 0, –0.09 (–0.55–0.37), 0.05 (–0.34–0.45), and 0.87 (0.46–1.29), respectively. This effect was stronger in adults > 60 years. Tea consumption of≥4 cups/day was inversely associated with self-reported poor memory (OR 0.70 (95% CI 0.56–0.86)) and memory decline (OR, 0.73 (95% CI 0.62–0.87)). There was a significant interaction between tea consumption and iron intake in relation to cognition. High iron intake was inversely associated with cognition in non-consumers of tea but not in tea consumers. Conclusion: Higher tea intake is associated with reduced cognitive decline in adults and inhibits the adverse effect of high iron intake.
The Chinese Version of UHDRS in Huntington’s Disease: Reliability and Validity Assessment
Authors: Li Xiao-Yan , Bao Yu-Feng , Xie Juan-Juan , Qian Shu-Xia , Gao Bin , Xu Miao , Dong Yi , Burgunder Jean-Marc , Wu Zhi-Ying
Published: September 2022

Background: The Unified Huntington’s Disease Rating Scale (UHDRS) is a universal scale assessing disease severity of Huntington’s disease (HD). However, the English version cannot be widely used in China, and the reliability and validity of the Chinese UHDRS have not yet been confirmed. Objective: To test the reliability and validity of Chinse UHDRS in patients with HD. Methods: Between August 2013 and August 2021, 159 HD patients, 40 premanifest HD, and 64 healthy controls were consecutively recruited from two medical centers in China and assessed by Chinese UHDRS. Internal consistency and interrater reliability of the scale were examined. Intercorrelation was performed to analyze the convergent and divergent validity of the scale. A receiver operating characteristic analysis was conducted to explore the optimal cutoff point of each cognitive test. Results: High internal consistency was found in Chinese UHDRS, and its Cronbach’s alpha values of the motor, cognitive, behavioral and functional subscales were 0.954, 0.826, 0.804, and 0.954, respectively. The interrater reliability of the total motor score was 0.960. The convergent and divergent validity revealed that motor, cognitive and functional subscales strongly related to each other except for Problem Behavior Assessment. Furthermore, we not only provided the normal level of each cognitive test in controls, but also gave the optimal cutoff points of cognitive tests between controls and HD patients. Conclusion: We demonstrate for the first time that the translated version of UHDRS is reliable for assessing HD patients in China. This can promote the universal use of UHDRS in clinical practice.
ORKESTRASI DAKWAH HABIB SYEKH MELALUI MUSIK RELIGI
Authors: Muntoyibah Siti , Nurcholis Ahmad
Published: September 2022

ABSTRACT

In the current development of da’wah, it has created the character and creativity of preaschers in the vision and mission of delivering da’wah messages by utilizing social media which is often used by various groups, including youtube, instagram, twitter, facebook, and others. The influence of advances in science and technology makes information easy to obtain and dissemination of inaccurate information easily affects the mind. overcoming problems like this can be done with blessings, so that the mind is not easily deceived.

One of the scholars named habib syekh used the art of religious music to follow in the footsteps of the walisongo when introducing islamic teachings to the village community without coercion. so that this becomes an interest in various ages and the atmosphere in preaching so that it doesn’t seem boring. the scholars have charismatic characteristics and different preaching to attract the attention of mad’u. the use of social media in habib syekh’s preaching is to make it easier for mad’u or social media users to easily access and share with connoisseurs of religious music.

in this writing, what is meant by da;wah orchestration is the writing ofsong lyrics that contain da’wah messages by paying attention to the composition and order of music or an orchestra supported by a musical instrument. this was used by habib syekh, the bridge to invite mad’u to perform prayers.

 

keywords: da’wah orchestration, habib syekh, religious music
Komunikasi Vertikal dan Horizontal dalam Upaya Membentuk Gaya Kepemimpinan yang Demokratis Sesuai Prinsip Islam di Fakultas Adab UIN Raden Intan Lampung
Authors: Mustofa Muhamad Bisri , Wuryan Siti , Aristina Septiya , Vandira Sharah Nadine
Published: September 2022

The success of an institution or company is closely related to a leader who is able to control a two-way communication. The world of IT was made the Raden Intan Lampung State Islamic University to launch two-way communication to make it easier to realize the goals or vision and mission of a university. It is undeniable that such communication has advantages and disadvantages, for example it often happens miscommunication caused by the loss of concern between employees or staff, superiors and subordinates at the University, then formality in a formal context has begun to disappear. The research that we conducted concerns vertical and horizontal communication at the Faculty of Adab, UIN Raden Intan Lampung, which which can be used as a reference for shaping democratic leadership it is hoped that it will add value to the quality of the university.