bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimal design of shell constructions taking into account the evolution of corrosion damage
Authors: Dzyuba Anatolii , Dzyuba Oleksandr , Levitina Larysa 
Published: July 2022

An algorithm for computer modeling of the evolution of corrosion wear of the surface material of shell elements in the conditions of joint action of mechanical external loads and the impact of aggressive environments has been developed.
A mathematical model of deformation of shells of rotation with variable as a result of corrosion of external and internal components of wall thickness is constructed.
The proposed algorithm allows to trace in time the process of corrosion degradation of the surface material of the shells in accordance with arbitrary (existing) mathematical models of corrosion from the initial moment of time to complete destruction due to corrosion loss of material.
An original algorithm for selecting the optimal parameters of the rotation shells and the study of their durability taking into account the corrosion degradation of the surface material has been developed.The essence of the algorithm is to optimize the design parameters at the end of its durability, further reverse bilateral build-up of the "sacrificial" layer of material and rational refinement of the project according to technological requirements.
The solution of the problem of weight optimization of the shell under conditions of asymmetric bilateral non-uniformto the surface material, as a result of corrosion damage, is carried out using the necessary conditions of optimality in the form of the principle of maximum L. S. Pontryagin with phase constraints.The problem of satisfying technological requirements at the initial moment of time is formulated as the problem of the best quadratic approximation of the obtained continuous controls in the form of optimally variable thickness of the shell wall with a piecewise constant function.
Numerical results of computer modeling of corrosion degradation of surface material and selection of optimal parameters of a cylindrical reservoir for storage of petroleum products under conditions of simultaneous action of force loading and influence of aggressive environment are given.
The technology of crack repair by polymer composition
Authors: Tonkacheiev Hennadii , Molodid Oleksandr , Galinskyi Oleksandr , Plokhuta Ruslana , Rudnieva Iryna , Priadko Yurii 
Published: July 2022

Introduction. During the inspection of buildings and structures and development of design documentation for restoration works it was found that there is a need to provide recommendations or to develop solutions for repair work. These repair works either are not regulated by standards or may be technically or economically inefficient.
Problem Statement. The most common defect of the tension zone in reinforced concrete beams, floor slabs or roof slabs are cracks. Injection technology is normally used to repair it. However, in case of large number of small cracks, this technology is time consuming.
Purpose. Development of a new technology for repairing the tension zone of reinforced concrete beams, floor slabs or roof slabs with a large number of small cracks. This will ensure maximum filling of cracks with polymer compositions with their subsequent bonding.
Materials and methods. A number of factors that may affect the technology of filling cracks with polymer compositions have been identified from the analysis of scientific and technical literature. A special device ‘tray’ was produced for experimental research. It was attached to the lower zone by a system of ties or props. A repair mix to fill the cracks was fed into the tray under pressure. By means of changing the experiment conditions the strengthening level of previously destroyed samples were set.
Results. As a result, it was found that the maximum filling of cracks with the polymer composition is achieved within the 5-10 minutes of repair mix supply at a pressure in the system in the range of 0.5-0.6 atmospheres (atm). The maximum strengthening of the repaired structures under the re-applied destructive force was achieved at the conditions of repair work with a structural temperature of 20 ± 2 оС and dry state of the structure.
Conclusions. The technology of repair with polymer compositions of the cracks located on the lower surface of horizontal reinforced concrete structures has been developed. It was established that in the presence of small cracks on the structure (the width is up to 0.2 mm) the developed technology is most effective, in case of widths from 0.3 to 0.8 mm it is advisable to use injection technology whereas for widths larger than 0.8 mm the hybrid technology should be applied.
Periodic vibrations of reservoir shell with the real shape imperfections under pressure
Authors: Lukianchenko Olga , Kostina Olena , Paliy Oksana 
Published: July 2022

The numeral approach to analysis of influence the real shape imperfections on natural and forced periodic vibrations of reservoir shell under pressure was presented. The approach was based on a theory and the methods of structural mechanics and calculable procedures of finite-element software complex NASTRAN. The welded steel reservoir with a variable thickness along its height was investigated. On the manufacted stage, transporting and exploitating the defects of wall shape were formed. The actual radial and angular deviations of the reservoir belts as a result measurements by theodolite were got. Geometry of shell with the real shape imperfections by spline curves and spline surfaces with adding of factual radial and angular rejections to the proper coordinates of points formative shells with an ideal surface was built. Model of reservoir in the form of a cylindrical shell with a three-cornered finite-element net was presented. The limits on the radial and tangential displacements of top edge nodes were entered, the nodes of lower edge were fastened. The periodic loading as external pressure was given. The modal analysis of shell without and with real shape imperfections by the decision of task on natural vibrations (Normal Modes) by the Lanczos method was executed. It was discovered that the natural forms of shell with real shape imperfections had local deformations in the places of maximal radial deviations from a vertical line unlike regular deformations in all natural forms of ideal shell. Natural frequencies were decreased and were slit and there wasn’t influence on its dense distribution due to the presence of shell shape imperfections. A transient and forced periodic vibrations of shell under pressure were investigated. Analysis of transient was executed by the method of direct integration (Direct Transient). The presence of shape imperfections in the shell wall influenced the increase of the transient duration and the dynamic coefficient The direct frequency analysis of shell response on periodic loading (Direct Frequency) was executed taking into account the proper ten first forms and frequencies of natural vibrations. Significant influence of the shell shape imperfections on the resonant frequencies of the forced periodic vibrations and corresponding form of deformation was discovered.
Computer simulation of the stress-strain state of plates with reinforced elongate rectangular holes of various orientations
Authors: Hart Eteri , Hudramovich Vadym 
Published: July 2022

The results of numerical investigation of the stress-strain state of elastic rectangular plates with reinforced elongated holes under the action of axisymmetric tensile forces are presented. The holes have different orientations relative to the direction of forces, the materials of the plate and reinforcements are different too. Computer modeling was carried out using the finite element method. The influence of mechanical and geometrical parameters of plates and reinforcements, orientation of holes (angle of rotation relative to the direction of action of forces) on the stress-strain state of the plate are studied. The dependence of the change in the stress concentration factor in the plate on the orientation of the hole, the ratio of the elastic modulus of the plate materials and reinforcements (the elastic modulus of the reinforcement material is 3 times greater (or less) than the elastic modulus of the plate material) has been established. Plates with holes located at angles of 60°, 45° and 30° in the direction of the load are modeled. It is shown that a good choice of geometric and stiffness characteristics of the parameters of reinforcement, plate and elongate hole orientation can significantly reduce the stress concentration in the plate. Patterns of stress intensity distribution in the plate sections passing along one of the hole sides and stress concentration in the vicinity of the corner points of the holes are constructed. The results obtained in this work can be used to solve the problems of optimization of thin-walled rectangular plates with elongated holes, having strip reinforcement along the edges.
Assesment of the temperature loading influence on crack resistance of a tank with a semi-eliptical crack
Authors: Pyskunov Serhii , Goncharenko Maryna , Shkryl Oleksii 
Published: July 2022

Reservoir parks are the main place of storage of petroleum products. There has been a tendency transition to the use of larger tanks in recent years, which is economically justified. However, it is leads to fire risk increase to accumulate large quantities of petroleum products. Tank fire is one of the most dangerous emergency event, which can lead not only to significant material damage but also to ecological human losses in case of spreading of fire to other tanks. To ensure safety and test the bearing capacity in these conditions determination of the stress-strain state in such tanks must be performed taking into account the temperature load. If there is an initial crack in the tank wall the assessment of crack resistance should be performed. In a previous work the authors determined the stress intensity factor (SIF) distribution along the semi-elliptical crack front in the RVS-5000 tank under hydrostatic pressure. The estimation of a stress-strain state of a steel vertical tank with an initial semi-elliptical crack under the thermal loading is performed in this article. It is suppoused that the part of wall of the tank, located closest to the fire epicenter, is heated unevenly in height: from 300 degrees at the top to 200 degrees at the bottom. On the other part of the tank the temperature reaches 70 degrees. The temperature within wall thickness is considered constant. Given the asymmetric nature of the temperature distribution, a discrete model was developed for the entire tank. After determining the stress-strained state in the whole tank under hydrostatic pressure and temperature load, a fragment with a semi-elliptical crack was calculated separately. The stresses determined from the calculation of the whole tank are used like an external load, applied on fragment boundaries. The difference of results of direct and energetic method of SIF calculation are in the range of 5%. Taking into account the temperature loading leads to an increase in the SIF values by about 20 % in comparison to the results of the calculation only under hydrostatic pressure.
PENGARUH BAURAN PEMASARAN TERHADAP KEPUTUSAN PEMBELIAN KONSUMEN DI BLANCO COFFEE YOGYAKARTA
Authors: Chasanah Uswatun , Prihatiningtyas Gita 
Published: July 2022

The point of overall study was to determine the impact of marketing mix on consumer purchasing decisions at Blanco Coffee Yogyakarta. The sort of investigation employed was descriptive quantitative and employs the survey strategy. The people surveyed included Blanco Coffee Yogyakarta customers. Its sampling method entails non-probability procedures, i.e., incidental sampling, including a representative of 100 individuals. Data analysis methods use multiple linear regression with assistance of large - scale application software SPSS 23. The investigation 's findings revealed that sample t - test could be used to identify two consecutive independent variables which have a substantial impact on the purchase decision, particularly regarding product and physical evidence, whereas the variables which do not possess a substantial impact on this same purchase decision are process, people, promotion, place, and price. At the same time, overall marketing mix does have a considerable impact on purchasing decisions having valuation F (5,214) > F-table (2,11). According to the findings of the study, overall marketing mix does have a 23 percent impact upon purchasing decisions, whereas the additional 77 percent is regulated by several other elements.
Intestinal nematodes Ascaris lumbricoides Eggs on Fruits in Jakabaring Central Market Palembang City
Authors: Shavira Febriana Ayu , Dalilah Dalilah , Susilawati Susilawati , Prasasty Gita Dwi , Anwar Chairil 
Published: July 2022

Soil-Transmitted Helminths (STH) intestinal nematodes hich is still a health problem in Indonesia. This disease could occur due to various factors, such as the habit of not washing the fruit before consumption. Consumption of fruits helps meet nutritional needs to protect the body from various diseases. This research aimed to determine whether there is STH egg contamination in fruits sold at the Jakabaring Central Market. This research was a descriptive-observational study. The fruit sample were collected from Jakabaring Central Market. A total of 50 fruits samples in this study consisted of Citrus sinensis, Cucumis melo, Ananas Comosus, Musa sp., and Citrullus lanatus The sample processing was carried out using the sedimentation method. About 200 grams of fruit skin samples were immersed in 0.2% NaOH. Microscopic observations were made at the Biooptic Laboratory and Medical Chemistry Laboratory of FK Universitas Sriwjaya. A total of 9 (18%) samples were showed positive results of STH contamination, which were 7 samples of pineapple Ananas comosus (14%) and 2 samples of watermelon Citrullus lanatus (4%). From the 9 positive samples, 35 Ascaris lumbricoides infertile-decorticated eggs were found. Thus, contamination of Ascaris lumbricoides eggs in fruits were detected and its non infective stage Jakabaring Central Market Palembang City. Although all eggs found in non infective stage , with sufficient percentage of contamination, improving hygiene before consuming must be considered.
Co-creating Inclusive Public Spaces: Learnings from Four Global Case Studies on inclusive Cities
Authors: Patrick Mikaela , McKinnon Iain 
Published: July 2022

This paper presents some of the findings from a global research study on inclusive infrastructure and city design and will focus on inclusive public spaces. Persons with disabilities can experience multi-dimensional exclusion from urban life, including but not limited to physical, attitudinal and social barriers. Public spaces, including recreational and social spaces, are often not prioritised. Inclusive public spaces are fundamental to participation and inclusive in society. Including persons with disabilities in the design and planning of the built environment supports equal rights and helps identify people’s aspirations for inclusive environments. Four city case studies will be discussed in this paper: Ulaanbaatar, Mongolia; Varanasi, India; Surakarta, Indonesia; and Nairobi, Kenya. Research participants and objectives are organised by three stakeholder groups:

People - first-hand experiences of persons with disabilities living in the city and their aspirations for a more inclusive city
Policy - the awareness and understanding of inclusive design among policy-makers
Practice - the awareness and understanding of inclusive design among practitioners including barriers to implementation, opportunities and the relationship with assistive technology

Methods include document reviews, interviews, photo diaries and co-design workshops with participatory and inclusive engagement of persons with disabilities throughout. Findings on public spaces are discussed in three ways:

The types of public spaces valued by participants in each of the four cities.
The barriers and challenges experienced by persons with disabilities in the public realm.
Aspirations for more inclusive public spaces and opportunities for inclusive design

The paper concludes by discussing how the targeted stakeholder groups of people, policy and practice also help represent three essential dimensions of inclusive city design and forming a framework for successful implementation and delivery and supporting targets set out through the UNCRPD and Sustainable Development Goals (SDGs).

Read the full article in accessible html-format here.
Effect of short- and medium-chain fatty acid mixture on polyhydroxyalkanoate production by Pseudomonas strains grown under different culture conditions
Authors: Szacherska Karolina , Moraczewski Krzysztof , Czaplicki Sylwester , Oleskowicz-Popiel Piotr , Mozejko-Ciesielska Justyna 
Published: July 2022

Short- and medium-chain fatty acids (SMCFAs) derived from the acidogenic anaerobic mixed culture fermentation of acid whey obtained from a crude cheese production line and their synthetic mixture that simulates a real SMCFA-rich stream were evaluated for polyhydroxyalkanoate (PHA) production. Three individual Pseudomonas sp. strains showed different capabilities of growing and producing PHAs in the presence of a synthetic mixture of SMCFAs. Pseudomonas sp. GL06 exhibited the highest SMCFA tolerance and produced PHAs with the highest productivity (2.7 mg/L h). Based on these observations, this strain was selected for further investigations on PHA production in a fed-batch bioreactor with a SMCFA-rich stream extracted from the effluent. The results showed that PHA productivity reached up to 4.5 mg/L h at 24 h of fermentation together with the ammonium exhaustion in the growth medium. Moreover, the PHA monomeric composition varied with the bacterial strain and the type of the growth medium used. Furthermore, a differential scanning calorimetric and thermogravimetric analysis showed that a short- and medium-chain-length PHA copolymer made of 3-hydroxybutyric, -hexanoic, -octanoic, -decanoic, and -dodecanoic has promising properties. The ability of Pseudomonas sp. to produce tailored PHA copolymers together with the range of possible applications opens new perspectives in the development of PHA bioproduction as a part of an integrated valorization process of SMCFAs derived from waste streams.
Endoscopic outcomes in patients with AERD treated with topical antibiotics and intranasal corticosteroids
Authors: Martinez-Paredes Jhon F. , Choby Garret , Marino Michael , Lal Devyani , Olomu Osarenoma , Alfakir Razan , Stokken Janalee K. , O’Brien Erin , Donaldson Angela M. 
Published: July 2022

BackgroundIdentifying effective therapy for recalcitrant chronic rhinosinusitis with nasal polyposis (CRSwNP) is a major challenge; and subtypes such as aspirin-exacerbated respiratory disease (AERD) are even more difficult to treat. Evidence on topical antibiotics use in (CRSwNP) is lacking. Current consensus guidelines recommend against its routine use, but recent reviews show some benefit when managing recalcitrant disease after endoscopic sinus surgery (ESS).ObjectiveEvaluate the effect of culture-directed topical antibiotics on sinonasal outcomes in AERD patients with a positive perioperative sinonasal bacterial culture who have undergone ESS.MethodsA retrospective cohort study of AERD patients with positive sinonasal culture, who underwent ESS from 2016 to 2021 was performed. Forty-four patients were identified and stratified based on their postoperative medical treatment. Twenty-six underwent postoperative intranasal corticosteroids (INCS) alone, while eighteen underwent INCS plus a 4-weeks treatment with topical antibiotics. SNOT-22 and Lund-Kennedy score (LKS) were assessed preoperatively and at 4-weeks and 4-6 months after ESS.ResultsA statistically significant improvement in the 4-weeks and 4-6 months postoperative SNOT-22 and LKS were noted within both groups (p&lt;0.05). However, only a statistically significant difference was found in the 4-weeks postoperative LKS when comparing between treatment groups (p=0.01). Our linear regression model demonstrated a relationship between the use of combined therapy with INCS and topical antibiotics and the LKS 4-weeks post ESS (p=0.015).ConclusionIn AERD patients with a confirmed sinus infection, the combination of culture-directed topical antibiotics and intranasal corticosteroid irrigations in the postoperative period can provide a short-term improvement in endoscopic scores.
ABCD3 is a prognostic biomarker for glioma and associated with immune infiltration: A study based on oncolysis of gliomas
Authors: Li Jinchuan , Zhang Yi , Qu Zhizhao , Ding Rui , Yin Xiaofeng 
Published: July 2022

BackgroundGliomas are the most lethal primary brain tumors and are still a major therapeutic challenge. Oncolytic virus therapy is a novel and effective means for glioma. However, little is known about gene expression changes during this process and their biological functions on glioma clinical characteristics and immunity.MethodsThe RNA-seq data after oncolytic virus EV-A71 infection on glioma cells were analyzed to screen significantly downregulated genes. Once ABCD3 was selected, The Cancer Genome Atlas (TCGA), Chinese Glioma Genome Atlas (CGGA), Genotype-Tissue Expression (GTEx), Clinical Proteomic Tumor Analysis Consortium (CPTAC), and Human Protein Atlas (HPA) data were used to analyze the relationship between ABCD3 expression and clinical characteristics in glioma. We also evaluated the influence of ABCD3 on the survival of glioma patients. CIBERSORT and Tumor Immune Estimation Resource (TIMER) were also used to investigate the correlation between ABCD3 and cancer immune infiltrates. Gene set enrichment analysis (GSEA) was performed to functionally annotate the potential functions or signaling pathways related to ABCD3 expression.ResultsABCD3 was among the top 5 downregulated genes in glioma cells after oncolytic virus EV-A71 infection and was significantly enriched in several GO categories. Both the mRNA and protein expression levels of ABCD3 were upregulated in glioma samples and associated with the prognosis and grades of glioma patients. The Kaplan–Meier (K-M) curve analysis revealed that patients with high ABCD3 expression had shorter disease-specific survival (DSS) and overall survival (OS) than those with low ABCD3 expression. Moreover, ABCD3 expression could affect the immune infiltration levels and diverse immune marker sets in glioma. A positive correlation was found between ABCD3 and macrophages and active dendritic cells in the microenvironment of both the GBM and LGG. Gene sets including the plk1 pathway, tyrobp causal network, ir-damage and cellular response, and interleukin-10 signaling showed significant differential enrichment in the high ABCD3 expression phenotype.ConclusionOur results suggested that ABCD3 could be a potential biomarker for glioma prognosis and immunotherapy response and also further enriched the theoretical and molecular mechanisms of oncolytic virus treatment for malignant gliomas.