bluuebunny/crossref_metadata_2025 huggingface dataset:
A Coupled Model between Robot Trajectories and Thermal History of the Workpiece during Thermal Spray Operation
Authors: Bolot R. , Deng S. , Cai Z. , Liao H. , Montavon G.
Published: March 2024

The aim of this work is to develop a model that predicts coating thickness based on thermal spray robot trajectories and the thermal history of the workpiece. To test the model, an alumina layer is deposited on a steel substrate by air plasma spraying. Robot path coordinates are stored in a text file and used to compute substrate temperature fields by solving the transient heat conservation equation during torch displacement. The contributions of the impinging plasma jet and molten particle stream are accounted for in the model. The distribution of matter in the particle spray is used to simulate coating formation and determine coating thickness.
High Productivity PS-PVD Process
Authors: Barth A. , Gindrat M. , Usai S.
Published: March 2024

Plasma spray-physical vapor deposition (PS-PVD) has been developed over the past years to produce columnar structured deposits for thermal barrier applications. The non line-of-sight process makes it possible to deposit coatings on complex components in a single production step. The fundamentals of PS-PVD have been well studied and the knowledge obtained is being used to scale up the process. This paper presents initial results on concepts that have been implemented to increase production rates as well as process efficiency.
Behavior of Ceramic Thermal Spray Coatings under Plasma Exposure
Authors: Yokota H. , Inaba M.
Published: March 2024

This study investigates plasma erosion mechanisms in alumina and yttria coatings produced by air plasma spraying. Plasma exposure tests were conducted in ICP etchers using CF4, Ar, and O2 as process gases. Etching rates were calculated based on height differences between masked and unmasked areas and coating cross-sections, surface morphologies, and phase distributions were analyzed. In the Al2O3 layers, erosion increased with increasing CF4 concentration and fluoridation of the coating surface was confirmed, suggesting that chemical erosion is the dominant mechanism. Although fluoridation occurred on Y2O3 surfaces as well, the amount of erosion in CF4 was the same as in the Ar environment. It is thus assumed that the fluoride formed on Y2O3 surfaces is very stable and that physical erosion due to ion sputtering is the dominant mechanism.
Analysis of Liquid Feedstock Behavior in High Velocity Suspension Flame Spraying for the Development of Nanostructured Coatings
Authors: Gozali Ebrahim , Kamnis Spyros , Gu Sai
Published: March 2024

The aim of this work is to obtain a better understanding of high-velocity suspension flame spraying though detailed modeling and analysis. A numerical model was developed and is used to analyze the effects of process parameters including droplet size, injection velocity, secondary droplet breakup, solution evaporation and combustion, mass flow rate, flame temperature, and the location of the injection point. The results show that initial injection parameters play an important role in controlling the process and should be specified to minimize cooling effects and promote droplet evaporation inside the combustion chamber. It was also found that the ideal location for the injection point is inside the chamber, which in practice, can be achieved by slightly modifying gun geometry.
Wear Performance of Thermally Sprayed and Welded Coatings Using Conventional and Nanostructured Materials
Authors: Lima C.R.C. , Bette B.V. , Camargo F. , Fals H.C. , Ferraresi V.A.
Published: March 2024

The main objective of this study is to compare the wear resistance of coatings obtained by gas metal arc (GMA) welding, wire arc spraying, and high-velocity oxyfuel (HVOF) spraying. Tungsten and chromium carbide (WC-Co and CrC-NiCr), iron alloy (Vecalloy B and 140-MXC), and 420 stainless steel coatings were deposited on low carbon steel substrates by the appropriate method. The coatings were examined by optical and scanning electron microscopy, showing no signs of spallation nor relevant level of defects. WC-Co coatings obtained by HVOF spraying exhibited the best abrasive wear resistance. Nanostructured Fe-alloy coatings applied by wire arc spraying performed almost 50% better than HVOF sprayed CrC and only 15% worse than WC-17Co. The erosion resistance of the two WC-Co coatings was very close, although WC-12Co was slightly better possibly due to its higher microhardness, lower porosity, and higher residual compressive stresses.
Fabrication of Dense Ceramic Coatings by Using HVOF Spraying
Authors: Kim Jin-Hong , Seong Byeong-Geun , Kim Hyung-Jun
Published: March 2024

In this study, dense ceramic coatings are fabricated by HVOF spraying using Al2O3-TiO2 powder. To evaluate the effects of the feedstock material and spray equipment, conventional and nanostructured powders were sprayed using different HVOF systems. Coating microstructure, bond strength, hardness, porosity, and wear resistance were measured and the results are compared with conventional plasma-sprayed coatings.
Characterization of the Flow Regimes in the Jet Spray for Different Twin-Wire Arc Spraying Nozzles by Adapting the Background Oriented Schlieren Technique
Authors: Tillmann W. , Mohamed A. , Nassir A. , Hagen L. , Rademacher H.G.
Published: March 2024

The rapid pace of advancement in thermal spraying is in large part due to the availability of diagnostic tools that are used to measure process variables such as particle temperature, particle trajectories, and plume geometry. The work presented here deals with the adaptation of an imaging method that can be used to visualize, quantify, and distinguish between laminar, transitional, and turbulent flow regimes. The method is based on schlieren photography and an image processing procedure that extracts the density field of a flow relative to a background image. In this study, the promising new method known as background-oriented schlieren (BOS) is used to evaluate different nozzle designs for twin-wire arc spraying. The results are presented and compared with CFD simulations, conventional schlieren images, and color photographs of the spray plume.
Plasma Spray-Physical Vapor Deposition of La1-xSrxCoyFe1-yO3-δ Thin Film Oxygen Transport Membrane on Porous Metallic Supports
Authors: Jarligo M.O. , Mauer G. , Bram M. , Baumann S. , Vaßen R.
Published: March 2024

In this work, plasma spray-physical vapor deposition (PS-PVD) is used to create oxygen transport membranes, consisting of gastight LaSrCoFeO thin films on porous MCrAlY metallic supports. During spraying, a protective layer of alumina forms at the interface between the membrane and support preventing interdiffusion. Surface roughness of the metallic support is shown to play a critical role in limiting microstructural defects. Phase composition, growth rate, and microstructure buildup are also investigated along with the annealing behavior of LSCF films at different temperatures. Initial results are promising and further improvements are expected by optimizing process parameters.
Adhesion/Cohesion Strength of Plasma Sprayed Ceramic Coatings by Scratch Testing On Cross-Section
Authors: Byon Eungsun , Lee Soo-Wohn , Kitamura Junya , Holmberg Kenneth
Published: March 2024

This work investigates the reliability and reproducibility of scratch testing for YSZ and TiO2 coatings deposited on NiCr bondcoats by plasma spraying. Scratch tests were conducted on cross-sections of the spray coatings. An image of the scratched area was taken after testing using an optical microscope in order to determine failure mode. With a statistical evaluation, the adhesion and cohesion strength were determined. The results show that cross-sectional scratch testing is effective for estimating the adhesion and cohesion strength of plasma spray coatings.
Influence of Topcoat-Bondcoat Interface Roughness on Stresses and Lifetime in Thermal Barrier Coatings
Authors: Gupta M. , Skogsberg K. , Nylén P.
Published: March 2024

In previous work, it was observed that atmospheric plasma sprayed bond coats perform better than their HVOF counterparts, which is contrary to current literature data. The objective of this work is to understand the observed difference with the aid of finite-element modeling. Different thermally grown oxide layer thicknesses and surface topographies are evaluated and the modeling results are compared with current theories based on simplified sinusoidal profiles. It is shown that modeling can be used as an effective tool to understand the stress behavior in TBCs with different roughness profiles.
New Method for Carbon Nanofibers-Metal Powder Formation and Their Use in Thermal Spray Coatings
Authors: Vidal D.R. , Cano I.G. , Fernández J. , Guilemany J.M.
Published: March 2024

This study evaluates a method for producing carbon fiber composite feedstocks suitable for cold gas spraying. Powders consisting of Al-Si particles and carbon nanofibers were attrition milled at 16.5 Hz and 27.5 Hz for up to 12 h at room and cryogenic temperature. Particle shape and size were examined every hour and carbon fiber integration in the Al-Si matrix was assessed. Detailed results are presented and discussed. In all cases, cryomilled powders had smoother surfaces.
Characterization of WC Particle-Reinforced In-Situ FeAl Intermetallic Matrix Composite Coating by Cold Spraying
Authors: Wang H.-T. , Ji G.-C. , Wang R.-Y.
Published: March 2024

The aim of this work is to fabricate a particle-reinforced FeAl composite coating by cold spraying. Fe, Al, and WC powders were placed in a ball mill and mechanically alloyed for up to 36 h in order to obtain a nanostructured Fe(Al) solid solution reinforced with a high volume fraction of WC particles. The powder was examined and then cold sprayed on stainless steel substrates using N2 as the accelerating gas. The as-sprayed deposits exhibited rough surface morphology and dense cross-sectional microstructure with dual-scale WC dispersoids distributed uniformly in the Fe(Al) matrix. The coatings were annealed at 650 °C and subsequently reexamined. In-situ phase transformation from the solid solution to an intermetallic compound occurred after the post-spray treatment along with an improvement in microstructure.
Effect of SiC Particle Size and Volume Fraction on the Microstructure and Properties of Cold-Sprayed AZ91D-SiC Composite Coatings
Authors: Suo X.-K. , Yu M. , Planche M.-P. , Liao H.-L. , Suo Q.-L.
Published: March 2024

Magnesium alloy AZ91D-SiC composite coatings were fabricated by cold spraying to study the effects of SiC particle size and volume fraction on microstructure and mechanical properties. The results show that coatings with large SiC particles have higher microhardness and bonding strength. Mechanically blended powders with fine SiC particles, on the other hand, are difficult to deposit. SiC volume fractions in the starting powders were 15, 30, 45, and 60 vol%, resulting in coatings with SiC volume fractions of 19, 27, 37, and 51 vol%. Based on test results, coating hardness and bonding strength increase with increasing volume fraction of SiC particles.
Formation of the Natural Framework During the Reorganization of Industrial Zones in Rostov-Na-Don
Authors: SLEPNEV M.A. , SHMYGLINA E.V.
Published: March 2024

The current situation in the largest cities causes concern among residents and dictates the need to develop new systematic urban planning approaches aimed at creating a comfortable and safe living environment and preserving the natural and recreational framework of the city (hereinafter referred to as the NRF). he absence of regulations on the use of territories located in the vicinity of the NRF, an increase in the density of development leads to an increase in recreational load. Due to the fact that the object in question performs the functions of recreational value, the article substantiates the need for the formation of a NRF taking into account the reorganization of industrial zones. The task set has scientific and practical significance, aimed at improving the quality of urban planning, improving the state of natural conditions, ensuring sustainable territorial development of the city as a whole.
Design of FTS for High-Rise Buildings
Authors: GUTORA T.V. , VERKHOVSKY A.A.
Published: March 2024

The problems arising in the design of facade translucent structures (FTS) for high-rise buildings are considered. The main problem in the design is the correct choice of source data for setting external and internal boundary conditions. An incorrect or erroneous choice of these parameters can have a significant impact on the calculation model and the results obtained for evaluating the thermal characteristics of the structure by the calculation method. As a result of the analysis conducted, the basic principles of preparing a calculation model and evaluating the thermal characteristics of the FTS for high-rise buildings were determined.
Influence of Parameters of the Reinforced Base on the Change of Components of the Stress-Strain State of the Transformed Base
Authors: AVANESOV V.S. , TURSUNBAEVA K.O.
Published: March 2024

The choice of the foundation type is a crucial issue for ensuring safety and reliability in the construction of buildings and structures of various levels of responsibility. The main advantages of the construction of man-made bases are both their operational properties and the cost-effectiveness of the construction. At the same time, in case of exceeding settlements the reinforcement of soil base allows to reduce them. The paper presents the formulation and solution of the problem of behaviour of the stress-strain state (SSS) in the system «reinforcing elements – surrounding soil» on the example of a 21-storey building with a height of 65.7 m. Finite-element modelling related to the application of reinforcement elements of various parameters such as length, stiffness and geometry, as well as conventional methods of foundation construction such as slab or pile foundation. Analysis demonstrates that reinforcement elements have significant variability and could be effectively used in cases where the installation of a slab foundation settlements exceeding ultimate values. In addition, it shows which geometry of reinforcement elements is relevant to rational application in terms of settlements and forces in such elements.
Alterations in Gene Expressions Encoding PreproET-1 and NOS in Pulmonary Tissue in Endotoxemic Rats
Authors: Zaedi Sohel , Jesmin Subrina , Maeda Seiji , Shimojo Nobutake , Yamaguchi Iwao , Goto Katsutoshi , Miyauchi Takashi
Published: March 2024

Septic shock is characterized by hypotension and a hyporeactive response to vasopressor agents. The pathogenesis is due to vascular leaks and an increased synthesis of cytokines and nitric oxide (NO). The present study examined the time-dependent alterations of endothelin-1 (ET-1) and the expression of NO synthase (NOS) in lung tissue in a septic rat model. Normal Sprague-Dawley (SD) rats aged 10 weeks received 15 mg/kg lipopolysaccharide (LPS) and then were sacrificed at different time points (1, 3, 6, and 10 hrs). Rats that did not receive LPS were considered to be controls. Both systolic and diastolic pressure decreased in SD rats after LPS administration. Time-dependent onset of features of acute lung injury, such as the infiltration of inflammatory cells and thickening of alveolar septa, were seen in rats that received LPS. A 2.8-fold increase in the expression of preproET-1 level was observed in lung tissue 6 hrs after LPS administration. The expression of endothelial NOS (eNOS) was also altered in lung tissue in a time-dependent fashion. After the administration of LPS, there was a 16-fold increase in the expression of eNOS mRNA. The peak expression of inducible NOS (iNOS) in lung tissue specimens obtained from rats that received LPS was 45-fold higher than that in control rats. ET-1 is a potent vasoconstrictor and thereby may play an important role in the pathogenesis of acute lung injury in a septic rat model. The increased expression of NOS may result in excess NO production and may also play a role in the pulmonary complications of endotoxemia.
PENGARUH AUDIT TENURE, AUDIT ROTATION DAN FIRM SIZE TERHADAP KUALITAS AUDIT DENGAN PANDEMI COVID 19 SEBAGAI VARIABEL PEMODERASI PADA PERUSAHAAN CONSUMER GOODS YANG TERDAFTAR DI BEI PERIODE 2018-2022
Authors: Zulyazen Zulyazen , Solihin Solihin
Published: March 2024

Tujuan dari penelitian ini yaitu untuk mengevaluasi dampak audit tenure, rotasi audit, dan ukuran perusahaan pada kualitas audit, dengan pandemi COVID-19 sebagai variabel penengah pada lembaga di sektor Consumer Goods. Populasi yang dipakai pada analisis ini mencakup semua lembaga Consumer Goods yang tercatat di BEI dalam2018-2022. Metode sampling yang dipakai ialah purposive sampling. Analisa data dilakukan memakai regresi berganda dan Moderated Regression Analysis (MRA), serta teknik statistik deskriptif. Hasil penelitian menyatakan bahwa baik audit tenure maupun rotasi audit berdampak pada kualitas audit, sementara ukuran perusahaan tidak berdampak. Lebih lanjut, pandemi COVID-19 hanya memoderasi hubungan antara rotasi audit dan kualitas audit, sementara tidak memoderasi keterkaitan antara audit tenure dan ukuran perusahaan dengan kualitas audit.
PENGARUH SISTEM INFORMASI AKUNTANSI TERHADAP KINERJA UMKM DI MEDIASI KUALITAS LAPORAN KEUANGAN DI KECAMATAN KISARAN BARAT KABUPATEN ASAHAN
Authors: Lubis Ifni Suhaila , Lufriansyah Lufriansyah
Published: March 2024

Penelitian ini bertujuan untuk mengeksplorasi dampak sistem informasi akuntansi terhadap hasil operasional usaha mikro, kecil, dan menengah (UMKM), dengan fokus pada peran mediasi kualitas laporan keuangan. Dengan menggunakan pendekatan kuantitatif, survei dengan skala likert disebarkan kepada para pemangku kepentingan UMKM di Kecamatan Kisaran Barat, Kabupaten Asahan. Analisis data dilakukan dengan menggunakan Partial Least Squares Structural Equation Modeling (PLS-SEM) melalui SmartPLS. Temuan ini menggarisbawahi pengaruh signifikan sistem informasi akuntansi dan kualitas laporan keuangan terhadap kinerja UMKM. Selain itu, penelitian ini menyoroti pengaruh mediasi kualitas laporan keuangan terhadap hubungan antara sistem informasi akuntansi dan kinerja, khususnya dalam konteks Kecamatan Kisaran Barat, Kabupaten Asahan. Wawasan ini menyoroti peran penting sistem informasi akuntansi dan pentingnya praktik pelaporan keuangan berkualitas tinggi dalam mendorong hasil operasional dan meningkatkan kinerja UMKM.
صورة الامريكي لدى المواطن العراقي ابان ام المعارك
Authors: العطية فوزية
Published: March 2024

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راءة معاصرة في قصيدة عباسية
Authors: محمد سلمان نبيل
Published: March 2024

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لواقع الصحي للمرأة الريفية من جراء العمل الزراعي والبيئة الريفية.
Authors: احمد الحميري أزهار
Published: March 2024

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النصب بنزع الخافض
Authors: الهلالي خولة تقي الدين
Published: March 2024

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المتسولون (دراسة استطلاعية لعينة من المتسولين مدينة بغداد)
Authors: حافظ ناهدة عبد الكريم , العاني عبد اللطيف عبد الحميد
Published: March 2024

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دراسة في إختلاف حركة بنية الألفاظ
Authors: محسن ولاء صادق
Published: March 2024

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الغيوم وتركيبها بين الأعجاز القرآني والحقيقة العلمية (دراسة تطبيقية عن العراق)
Authors: السبهاني خميس دحام مصلح
Published: March 2024

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ثنائية النص والخطاب - قراءة نشوئية باطار معرفي-
Authors: اسكندر يوسف محمد جابر
Published: March 2024

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الفكر الإنساني وفلسفة الوقاية من الجريمة من منظور فلسفة الدفاع الاجتماعي
Authors: الشاوي رجاء مراد
Published: March 2024

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دور الدلالة في تأصيل الالفاظ السومرية دراسة تحليلية
Authors: عبد اللطيف سجى مؤيد
Published: March 2024

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تكرار ألركود الهوائي فوق العراق والمنظومات ألضغطية ألمشـّكلة له
Authors: عمران تغريد أحمد
Published: March 2024

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جامع الخلفاء ومئذنته دراسة تاريخية عمارية فنية
Authors: حمودي خالد خليل
Published: March 2024

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رسالة ياقوت الحموي إلى القفطي
Authors: العبيدي رشيد عبد الرحمن
Published: March 2024

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صورة العرب
Authors: العلي عبد الودود
Published: March 2024

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L'emploi spécifique de l'infinitif dans le poème "Où donc est le bonheur?" de Victor Hugo
Authors: Salman Lubna Hussein
Published: March 2024

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تطور المقال الإفتتاحي في جريدة المنار (1964-1967م)
Authors: مهدي محمد عبود , يوسف ليث بدر
Published: March 2024

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التقلبات المناخية في العالم
Authors: العوابد كريم دراغ محمد
Published: March 2024

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The preventive and inhibitory effects of red raspberries on cancer
Authors: Qi Zexiu , Yang Bei , Giampieri Francesca , Cianciosi Danila , Alvarez-Suarez José Miguel , Elexpuru-Zabaleta Maria , Quiles Josè L. , Forbes-Hernandez Tamara Y. , Zhang Di , Bai Weibin , Tian Lingmin , Mezzetti Bruno , Battino Maurizio , Armas Diaz Yasmany
Published: March 2024

Red raspberries are gaining attention more and more for their nutritional and bioactive components, with potential health effects such as antitumor properties. This review aims to describe the antioxidant activities of red raspberries, emphasizing the role of anthocyanins and ellagitannins as primary contributors among red raspberry polyphenols; it also outlined the connection between red raspberries and their role in inhibiting cancer cell growth by regulating oxidative stress. Numerous studies suggest that red raspberries are able to block cancer cell progression by inhibiting proliferation, migration, and autophagy, as well as regulating the cell cycle, angiogenesis, and DNA damage repair. This review sheds light to the growing evidence supporting antioxidants as a crucial link between fruit consumption and cancer prevention.
Alterations in Cerebrospinal Fluid Urea Occur in Late Manifest Huntington’s Disease
Authors: Pfalzer Anna C. , Shiino Shuhei , Silverman James , Codreanu Simona G. , Sherrod Stacy D. , McLean John A. , Claassen Daniel O.
Published: March 2024

Background: Huntington’s disease (HD) is a neurodegenerative disorder caused by expanded cytosine-adenine-guanine (CAG) repeats in the Huntingtin gene, resulting in the production of mutant huntingtin proteins (mHTT). Previous research has identified urea as a key metabolite elevated in HD animal models and postmortem tissues of HD patients. However, the relationship between disease course and urea elevations, along with the molecular mechanisms responsible for these disturbances remain unknown. Objective: To better understand the molecular disturbances and timing of urea cycle metabolism across different stages in HD. Methods: We completed a global metabolomic profile of cerebrospinal fluid (CSF) from individuals who were at several stages of disease: pre-manifest (PRE), manifest (MAN), and late manifest (LATE) HD participants, and compared to controls. Results: Approximately 500 metabolites were significantly altered in PRE participants compared to controls, although no significant differences in CSF urea or urea metabolites were observed. CSF urea was significantly elevated in LATE participants only. There were no changes in the urea metabolites citrulline, ornithine, and arginine. Conclusions: Overall, our study confirms that CSF elevations occur late in the HD course, and these changes may reflect accumulating deficits in cellular energy metabolism.
Hyperbolic multichannel graph convolutional network for social recommendation
Authors: Yang Xingyao , Chang Mengxue , Yu Jiong , Wang Dongxiao , Dang Zibo
Published: March 2024

Social recommendations enhance the quality of recommendations by integrating social network information. Existing methods predominantly rely on pairwise relationships to uncover potential user preferences. However, they usually overlook the exploration of higher-order user relations. Moreover, because social relation graphs often exhibit scale-free graph structures, directly embedding them in Euclidean space will lead to significant distortion. To this end, we propose a novel graph neural network framework with hypergraph and hyperbolic embedding learning, namely HMGCN. Specifically, we first construct hypergraphs over user-item interactions and social networks, and then perform graph convolution on the hypergraphs. At the same time, a multi-channel setting is employed in the convolutional network, with each channel encoding its corresponding hypergraph to capture different high-order user relation patterns. In addition, we feed the item embeddings and the obtained high-order user embeddings into a hyperbolic graph convolutional network to extract user and item representations, enabling the model to better capture the hierarchical structure of their complex relationships. Experimental results on three public datasets, namely FilmTrust, LastFM, and Yelp, demonstrate that the model achieves more comprehensive user and item representations, more accurate fitting and processing of graph data, and effectively addresses the issues of insufficient user relationship extraction and data embedding distortion in social recommendation models.
Diagnosis of brain disease based on the deep learning algorithms of neural imaging techniques
Authors: Wang Qian
Published: March 2024

Neuroimaging technology is considered a non-invasive method research the structure and function of the brain which have been widely used in neuroscience, psychiatry, psychology, and other fields. The development of Deep Learning Neural Network (DLNN), based on the deep learning algorithms of neural imaging techniques in brain disease diagnosis plays a more and more important role. In this paper, a deep neural network imaging technology based on Stack Auto-Encoder (SAE) feature extraction is constructed, and then Support Vector Machine (SVM) was used to solve binary classification problems (Alzheimer’s disease [AD] and Mild Cognitive Impairment [MCI]). Four sets of experimental data were employed to perform the training and testing stages of DLNN. The number of neurons in each of the DLNNs was determined using the grid search technique. Overall, the results of DLNNs performance indicated that the SAE feature extraction was superior over (Accuracy Rate [AR] = 74.9% with structure of 93-171-49-22-93) shallow layer features extraction (AR = 70.8% with structure of 93-22-93) and primary features extraction (AR = 69.2%).
RETRACTED: An efficient dynamic migration and consolidation method of VMs based on improved K-nearest neighbor algorithm and attribute weighting
Authors: Wang Yu-Lin , Wang Jin-Heng
Published: March 2024

This article has been retracted. A retraction notice can be found at https://doi.org/10.3233/JIFS-219433.
U.S. Tax Credits to Promote Practical Proactive Preventative Care for Parkinson’s Disease
Authors: Okun Michael S.
Published: March 2024

Persons with Parkinson’s disease (PD) and society at large can profit from a strategic investment into a forward leaning, practical, preventative, and proactive multidisciplinary care policy. The American healthcare system is not easily bent to accommodate this type of care, and thus a tax benefit is an attractive option. An individual federal income tax benefit of $6200 each year for every person residing in the US with a diagnosis of PD, could among other offerings provide monthly access to a licensed clinical social worker and access to mental health services. The implementation of more coordinated care has the potential reduce the burden of depression, anxiety, and demoralization. Personal training would also be covered and directed by physical and occupational therapists. The combination of home-based and telemedicine services would have the added benefit of improving access. The tax benefit would also provide access to a dietician. This type of care strategy could be designed to proactively identify early signs of aspiration and urinary tract infections to ‘head off’ significant morbidity. A $6200/year individual tax benefit for those diagnosed with PD will thus translate into more fall prevention, more care in the home setting, less hospitalizations, less depression, less anxiety, less demoralization, better diets, and less persons placed in nursing facilities. Additionally, this tax benefit will provide the potential for billions of dollars in savings to the healthcare system. A tax benefit for PD is a practical preventative and proactive strategy which can serve to advantage both this generation and the next.
Building a foundation for competitive integrated employment: What does the future hold for pre-employment transition services
Authors: Wehman Paul , Tansey Tim , Taylor Joshua P. , Parent-Johnson Wendy , Whittenburg Holly , Averill Judy
Published: March 2024

One of the more creative aspects of the Workforce Innovation Opportunities Act (WIOA, 2014) is the pre-employment transition services program (Pre-ETS). In WIOA, for the first time a federal rehabilitation law has been reauthorized to include a requirement that 15% of the state case management service funding must be devoted to Pre-ETS activities. However, a significant number of state vocational rehabilitation (VR) agencies have been unable to spend this required 15% and therefore millions and millions of dollars nationally have been returned to the Rehabilitation Services Administration. In this paper, we describe how Pre-ETS can be used to get youth with disabilities into competitive and integrated employment, while also outlining many of the systems challenges related to these efforts— specifically for VR and schools. We also provide recommendations for the future to improve outcomes by making Pre-ETS work more effectively.
A numerical study of the multicriteria parametric optimization of the displacement and weight of a two-connected conical shell of minimal surface under thermal and power loading
Authors: Ivanchenko Gryhorii , Koshevyi Oleksandr , Koshevyi Oleksandr
Published: March 2024

Various methods and approaches are used to solve the problem of optimal design. Problems of this type are used for the optimal design of spatial coverings, which in modern architecture are progressive structures that are of interest to the whole world. Spatial coatings allow to give the building architectural expressiveness, cover large spans and combine load-bearing and enclosing functions.

The hulls of minimal surfaces are the hulls of negative Gaussian curvature. In general, the geometry of minimal surfaces cannot be described analytically. To solve this problem, which is associated with solving the differential equation that describes the minimal surface in general, under appropriate boundary conditions, one has to use methods of numerical analysis. This approach allows us to build a point frame of the shell, which is a matrix of discrete solutions of functions that searches for a given minimum surface. In view of this, its geometric characteristics can be obtained only in numerical form.

The basic relations of the linear theory of thin elastic shells of minimal surface are highlighted in the numerical study of parametric optimization. The mathematical justifications of how the external load is perceived and the process of creating the stress-strain state of the shells of minimal surfaces are highlighted.

For the numerical implementation of the multicriteria parametric optimization of a double-connected conical shell of minimal surface, a finite element model was built from plate finite elements in the amount of 4824 pieces and 4896 nodes. The perimeter is rigidly clamped to the ground disk. The thermal force load is set, which consists of a combination of static and temperature loads.

The developed methodology shows quite good results that coincide with the works of other authors and makes it possible to use two types of optimization for one research object simultaneously. The first stage is shape optimization, and the second stage is multicriteria parametric optimization.

This methodology makes it possible to perform optimization processes in an automated mode, which is an important applied task for construction and applied mechanics.
Analysis of the influence of different soil types on the natural frequencies of multi-storey reinforced concrete buildings
Authors: Kovrova Viktoriia , Volkova Viktoriia
Published: March 2024

According to current concepts, the construction of multi-storey and high-rise buildings is quite topical. Increasing the number of storeys and building density provokes an increase in loads and forces on the structural elements of the building, as well as on the soil base. It is necessary to take into account the mechanical characteristics of the soils underlying multi-storey buildings to improve the design models of objects when determining the forces and deformations in their elements. A vital indicator in monitoring the structural characteristics of buildings is global stiffness. Natural frequencies determined by modal analysis are used to detect its change. The purpose of this study is a numerical analysis of the effect of changes in the parameters of the soil base on the natural frequencies and values of vibrations of multi-storey reinforced concrete frame buildings using software systems. In this study, four variants of design models with rigidly fixed foundations and elastic foundations with different types of soils were developed.In the models with elastic foundations, stable soils were used, such as sandy, moderately stable, represented by loams and sandy loams, and weak soils containing a layer of peat. The building scheme was developed using the SCAD software package with the application of the finite element method. Taking into account that 90% of the territory of Ukraine is located in complex engineering and geological conditions, the use of the finite element method allows to effectively solve complex problems of interaction of heterogeneous elements, including in a nonlinear approach. As a result, it was found that the type of soil foundation affects the change in the natural vibration frequencies of a building. In the model with a rigidly fixed foundation, the frequencies are the highest, and the eigenvalues of oscillations are the lowest. A point that should be mentioned is that in the variants with an elastic foundation, the lowest frequencies are observed in the model on weak soils, and the highest values are typical for sandy foundation soils.
The dynamic analysis of fixed deep-water platform
Authors: Ostapenko Roman , Kara Iryna
Published: March 2024

The industrial progress is closely related with active using of hydrocarbons more than half of reserves of which lie in rock formations beneath seabed or ocean floor. For oil production at the great depth of immersion oil production fixed platforms are used most often. But using of such technological structures is not limited only to interest of oil and natural gas industry whereas they are important for navigation and military purposes. Offshore fixed platforms are exposed to effects of a high seismicity, wind, waves, strong undercurrents and an impulse impact during the movement of ice fields especially when exploitation in northern seas. The impact of different factors on the value of the period of natural oscillations ofthe offshore fixed deep-water ice-resistant platform with the depth of immersion 120 m that rests on the pile foundation was researched. Two discrete idealized models of the platform were used for the analysis: the first model that was implemented without taking into account the flexibility of the foundation and the second model where the flexibility of the pile foundation and the action of ground foundation were taking into account by the addition of elastic links that simulate the elastic connection between joints. Also, impacts of the connected mass of water media that was modeled in the form of additional distributed joints mass and the impact of the ice field that was modeled by the addition of additional links were investigated. The analysis showsthat values of periods of natural oscillations form increase by 8-20% when the flexibility of the pile foundation was taken into account; increase by 9-100% when the impact of the connected mass of water media was taken into account; decrease by 9-100% when the impact of the ice field and water media were taken into accountthat is significant when analyzing of stress-strain state of members of the structure.
Development of a parametric model of the spatially oriented knife on the bulldozer blade
Authors: Rashkivskyi Volodymyr , Fedyshyn Bohdan
Published: March 2024

The paper considers the results of the study of resistances arising during the operation of a bulldozer in the soil environment and processes in the drawing prism. What affects the stability and productivity of the bulldozer during excavation works. The geological map of the "Ukrainian crystalline shield" was studied, where the most common soils on the territory of Ukraine were found. Using the proposed hypothesis of the movement of spatially oriented knives on a bulldozer blade, it was shown that when excavating soil at different speed ratios, there is a deviation of the cutting force application vector by an angle (α), which in turn affects the geometric interaction of the spatially oriented knife with the working environment. Changing the geometric interaction of the spatially oriented knife with the soil affects the cutting force, which led to the creation of a parametric model of the interaction of spatially oriented knives with the working environment. The model was developed for different knife configurations and different ratios of the bulldozer speed to the spatially oriented knife movement speed. The total, normal, and orthogonal cutting forces for the working, subcritical, and critical depths of soil cutting were calculated, according to changes in the parametric model of the spatially oriented knife. A comparative calculation of the cutting force by a bulldozer without and with spatially oriented knives was carried out.
Analysis of the ecological state of urban green spaces in the Medeu district of Almaty
Authors: Sadyrova G. , Tanybayeva A. , Bazarbaeva T. , Mukanova G. , Jamilova S. , Nurmakhanova A.
Published: March 2024

This article examines the environmental problems of the cities of Kazakhstan, using the example of the Almaty metropolis, where, with the development of the urbanization process, the natural environment in cities is changing very much, which is characterized by a specific ecological environment with a special type of circulation of substances and energy, not typical of natural communities. The importance of green spaces in urbanized areas is very difficult to overestimate. Green plants play a major role in protecting the population of large cities from dust, smoke and harmful gases. In the city of Almaty, more than 70 species of trees and shrubs were introduced into production recommended by the botanical garden. Of the trees, these are Phellodendron amurense, Faidherbia albida, Crataegus sanguinea, Crataegus maximowiczii, Crataegus submollis, Crataegus punctata, Crataegus chrysocarpa, Ulmus laevis, Ulmus glabra, Gleditsia triacanthos, Catalpa bignonioides, Aesculus hippocastanum, Acer ginnala, Acer platanoide s, Acer saccharum, Juniperus virginiana, Juglans mandshurica, Padus maackii, from shrubs - Amorpha fruticosa, Swida alba, Syringa josikaea, Spiraea vanhouttei, Spiraea thunbergii, Spiraea japonica and others. A detailed floristic analysis of the tree and shrub flora of the city of Almaty showed that green spaces are represented by 208 species belonging to 58 genera and 34 families. Among tree and shrub species, 54 species (20%) represent the natural flora of Kazakhstan (9 coniferous and 45 deciduous species) from 13 genera and 9 families, and 154 species (80%) are introduced species, i.e. plants grown in soil outside their natural distribution range.
Hubungan antara Tinggi Pundak, Panjang Badan dan Lingkar Dada dengan Bobot Badan pada Domba Ekor Tipis
Authors: Hadiyanto Wawan , Widyani Retno , Sumardjo Djodjo
Published: March 2024

ABSTRAKPenelitian bertujuan untuk mengetahui hubungan antara bobot badan domba ekor tipis dengan tinggi pundak, panjang badan dan lingkar dada serta mengetahui besar keeratan antara bobot badan domba ekor tipis dengan tinggi pundak, panjang badan dan lingkar dada tersebut. Penelitian dilaksanakan di Pasar Hewan Ciledug Kecamatan Pabuaran Kabupaten Cirebon selama satu minggu, yaitu 1 â€“ 7 Desember 2008. Ternak yang diamati adalah 50 ekor domba ekor tipis jantan dan 50 ekor domba ekor tipis betina yang berumur 1,0 â€“ 1,5 tahun. Penelitian dilaksanakan dengan metode observasi dan pengamatan terhadap ternak domba ekor tipis yang memenuhi kriteria sesuai tujuan penelitian. Data utama yang diamati adalah jenis kelamin, umur domba, berat badan ( BB), Tinggi Pundak (TP), Panjang Badan (PB) dan Lingkar Dada (LD). Data yang diperoleh dianalisis dengan metode korelasi dan regresi. Lingkar dada, tinggi pundak dan panjang badan sebagai variable bebas, yakni X1, X2 dan X3, sedangkan berat badan sebagai variable tak bebas (Y). Hasil penelitian menunjukan bahwa antara berat badan memiliki hubungan yang erat dengan lingkar dada, tinggi pundak dan panjang badan domba ekor tipis. Pada domba ekor tipis jantan hubungan tersebut ditunjukkan dengan persamaan regresi Y = - 41,92 + 0,558 Â Â + 0,254 Â + 0,224 Â dan koefesien korelasi R = 0,927, sedangkan pada domba ekor tipis betina hubungan tersebut ditunjukan dengan persamaan regresi Y = -39,032 + 0,662 Â + 0,223 Â + 0,205 Â dan koefisien korelasi R = 0,910. Secara mandiri lingkar dada memiliki kolerasi yang paling kuat dengan berat badan. Pada domba ekor tipis jantan memiliki korelasi 0,890 dengan persamaan Y = -31,589 + 0,829 X dan pada domba ekor tipis betina memilki koefisien korelasi 0,900 dengan persamaan Y = -34,057 + 0,857 X.Kata Kunci : Morfologi, Bobot Badan Domba, Domba Ekor Tipis
Pengaruh Wet Cupping terhadap Kadar Hemoglobin Darah Vena Orang Sehat
Authors: Pranata Lilik
Published: March 2024

Wet cupping dikenal dengan istilah blood letting di negara-negara barat sudah lama di lakukan sejak zaman Hipokrates. Hijamah atau bekam (bahasa lainnya canduk, kop, cupping) adalah terapi yang bertujuan membersihkan tubuh dari darah yang mengandung toksik dengan penyayatan tipis atau tusukan kecil pada permukaan kulit. Wet Cupping dikembangkan sebagai pengobatan alternatif dan komplementer. Tujuan penelitian adalah untuk mengetahui pengaruh wet cupping terhadap kadar hemoglobin darah vena orang sehat. Metode penelitian ini dengan uji klinik eksperimental dengan rancangan pre dan post intervensi tanpa kelompok kontrol. Pelaksanaan wet cupping dilakukan di Puskesmas Kampus Palembang dan pengambilan darah dan pemeriksaan darah di balai besar laboratorium kesehatan (BBLK) Provinsi Sumatera Selatan. Sampel penelitian ini sebanyak 30 responden dengan rentang usia 18-22 tahun. Parameter yang dilihat adalah nilai kadar hemoglobin, perlakuan dilakukan setelah 8 jam intervensi. Untuk mengontrol faktor perancu dalam penelitian ini, responden sebelum mendapatkan perlakuan tidak diperkenankan olahraga dan aktivitas berat serta tetap mengkomsumsi makanan sehari-hari tanpa makanan tambahan. Hasil penelitian terjadi peningkatan kadar hemoglobin yang bermakna, 8 jam sesudah dilakukan wet cupping pada darah vena orang sehat, hasil rerata hemoglobin sebesar 15,08 ± 0.63 meningkat menjadi 15,45 ±0,76. Kesimpulannya bahwa wet cupping mempengaruhi kadar hemoglobin darah vena orang sehat, diharapkan wet cupping dapat digunakan dalam terapi alternatif dan komplementer.
Uji Reliabilitas Voice Handicap Index-30 Adaptasi Bahasa Indonesia dI RSUP Dr. Mohammad Hoesin Palembang
Authors: Yanti Lisa Apri , Ghanie Abla , Zulaeka Puspa , Adelien
Published: March 2024

Berbicara merupakan cara yang efektif untuk berkomunikasi. Adanya gangguan suara atau disfonia akan mengganggu proses komunikasi yang akan berdampak negatif terhadap kehidupan sosial. Voice Handicap Index (VHI) merupakan salah satu kuesioner untuk menilai persepsi suara dimana Agency of Healthcare Research and Quality pada tahun 2012 mengumumkan VHI sebagai diagnostik instrumen yang valid dan reliabel. Saat ini klinisi di Indonesia belum menggunakan alat ukur ini pada pasien dengan gangguan suara ataupun untuk evaluasi pascaterapi karena belum tersedianya instrumen yang sudah teruji reliabilitasnya dalam bahasa Indonesia. Penelitian ini bertujuan untukmendapatkan VHI adaptasi bahasa Indonesia yang reliabel, mengetahui sebaran subjek gangguan suara berdasarkan demografi, pemeriksaan perseptual subjektif (GRBAS) dan laringoskopi indirek. Penelitian ini menggunakan rancangan potong lintang. Subjek diambil dengan teknik consecutive sampling hingga terpenuhi jumlah sampel 40 orang. Penelitian dilakukan di poliklinik THT-KL divisi Laring Faring RSMH pada bulan Juni-November 2018. Hasil uji reliabilitas VHIdidapatkan skala fungsional, fisik, emosional maupun skor total memiliki nilai alpha lebih dari 0,7. Hal ini menunjukkanbahwa VHI adaptasi bahasa Indonesia reliabel untuk dijadikan suatu instrumen pemeriksaan. Nilai Cronbach-α tertinggiyaitu pada skala VHI total sebesar 0.884. VHI-30 adaptasi bahasa Indonesia reliabel sebagai instrumen penilaian kualitashidup pasien gangguan suara.
Analisis Faktor Risiko Terjadinya Stres Kerja pada Dokter Gigi di Kota Palembang
Authors: Mutiah Chelly , Malaka Tan , Sitorus Rico J.
Published: March 2024

Stres kerja sering terjadi pada tenaga medis salah satunya dokter gigi. Stres kerja yang berkelanjutan bisa menyebabkan gangguan kesehatan seperti sakit tulang belakang (low back pain) dan sakit kepala (headache). Tujuanpenelitian ini adalah untuk menganalisis faktor risiko terjadinya stres kerja pada dokter gigi di Kota Palembang. Penelitian ini menggunakan pendekatan cross sectional. Sampel penelitian adalah 85 dokter gigi di rumah sakit dan puskesmas di Kota Palembang pada tahun 2017 yang dipilih secara acak (simple random sampling) Penelitian dilakukan dalam dua tahap, tahap pertama sampel melakukan pengisian angket; tahap kedua sampel yang berisiko stres dilakukan wawancara mendalam oleh psikolog. Hasil analisis menunjukan bahwa sampel yang berisiko stres sebanyak tiga orang (3.6%). Faktor risiko yang berpengaruh adalah kondisi lingkungan kerja p value = 0,037 (95%CI 0,98-1,26) dengan PR 1,11. Hasil wawancara psikolog mendapatkan bahwa 0,85% responden mengalami depresi ringan, dan 1,7% mengalami stres ringan. Evaluasi dan perbaikan fasilitas di lingkungan kerja dokter gigi perlu dilakukan oleh dinas kesehatan kota Palembang untuk mencegah peningkatan kejadian stres kerja pada dokter gigi dikemudian hari.
Pengar uh Gel Kulit Nanas Madu Terhadap Penyembuhan Luka Terbakar Derajat Dua Pada Tikus Putih (Rattus Novergicus)
Authors: Rusmini Hetti , Djunishap Asmia , Naufal Muhammad Nurly Nuha , Hanif Muhammad Fikri
Published: March 2024

Kulit nanas (Ananas comosus. L) merupakan limbah dari olahan buah nanas yang populer dikonsumsi oleh masyarakat. Kulit nanas mengandung senyawa flavonoid yang mampu mempercepat proses penyembuhan luka bakar derajat 2. Penelitian ini bertujuan untuk mengetahui efek penyembuhan luka bakar dari gel kulit nanas pada tikus yang telah diberikan luka bakar derajat 2. Penelitian ini merupakan penelitian eksperimental dengan desain post test only control group. Ekstrak kulit nanas dibuat dengan menggunakan metode ekstraksi maserasi. Subjek penelitian yang digunakan dalam uji efektifitas penyembuhan luka bakar derajat 2 ini adalah tikus putih (Rattus novergicus). Sampel terdiri dari 5kelompok perlakuan yaitu kelompok yang diberi gel kulit nanas dengan konsentrasi 10%, 20%, dan 30% dan kelompok kontrol bioplacenton disertai kontrol negatif. Analisis data menggunakan One Way ANOVA. Hasil penelitian ini menemukan bahwa efektivitas gel kulit nanas dengan konsentrasi optimal 20% dengan efek penyembuhan setara dengan obat komersil bioplasenton.