bluuebunny/crossref_metadata_2025 huggingface dataset:
Surgical Treatment of Siewert II Gastroesophagel Junction Adenocarcinoma: Esophagectomy or Gastrectomy? Review
Authors: Imbrasaitė Ugnė , Giršvildaitė Dovilė , Baušys Rimantas , Baušys Augustinas
Published: January 2023

Introduction. Surgery is the only curative treatment option for patients with gastroesophageal junction (GEJ) adenocarcinoma. These tumors can be resected by gastrectomy or esophagectomy depending on tumor localization. Although, both surgeries are available for Siewert type II GEJ cancer, it remains unknown which one is superior. This review summarizes current evidences on the optimal surgical approach for Siewert type II GEJ adenocarcinoma. Methods. The literature search was performed within the PubMed database and 9 stu­dies comparing gastrectomy and esophagectomy for Siewert type II GEJ adenocarcinoma were included. The outcomes of interest included: length of surgery, numbers of retrieved lymph nodes, resection margins, postoperative morbidity and mortality, hospitalization time, 5-year overall, and disease-free survival rates. Results. Current studies do not favor any type of surgery in terms of length of the surgery, R0 resection rate, or postoperative morbidity. There is some tendency towards higher anastomotic leakage and postoperative surgical site infections rate after gastrectomy, while a higher incidence of pneumonia after esophagectomy. Similar, available studies suggest, that esophagectomy may lead to improved long-term outcomes. Conclusions. There is a lack of high-quality studies comparing gastrectomy and esophagectomy for Siewert type II GEJ adenocarcinoma. Esophagectomy may lead to improved long-term outcomes, but this preliminary data has to be confirmed in large, randomized control trials.
How do TV and radio hosts speak? Vowel tenseness as an index of formal and serious speaking style
Authors: Čičirkaitė Ramune
Published: January 2023

The present paper reports the instrumental analysis of the unstressed variants of /iː/, /uː/, /eː/, /oː/, /æː/ and /ɑː/. The study was carried out by employing the sound analysis software PRAAT, which was used to measure the length and tenseness of the specified variants. 10 residents of Vilnius city and 10 hosts of TV/radio programmes covering serious public topics were selected as the informants of the study. The main aims of this research were as follows: (1) to determine whether vowel length and tenseness differentiate the pronunciation of Vilnius city residents from that of the hosts of TV/radio programmes covering serious public topics, and (2) to reveal whether the hosts of TV/radio programmes use the length or tenseness of the unstressed variants of /iː/, /uː/, /eː/, /oː/, /æː/, /ɑː/ as a resource for creating a formal and serious speaking style. The current study examines, among other things, if the TV/radio hosts pronounce the unstressed variants of /iː/, /uː/, /eː/, /oː/, /æː/, /ɑː/ systematically more tensely, or perhaps on the contrary – they create the impression of a serious style only with isolated sounds of increased tenseness. The analysis has revealed that the hosts of TV/radio programmes covering serious topics pronounce the unstressed variants of /iː/, /uː/, /eː/, /oː/, /æː/ and /ɑː/ in the same length as Vilnius city residents speaking in a semi-formal style. Hence, vowel length in the said programmes is not a significant linguistic resource when creating a serious and formal speaking style and constructing the linguistic identity of a TV/radio host addressing serious public topics. However, TV/radio hosts covering serious public topics pronounce the unstressed variants of /iː/, /uː/, /eː/, /oː/, /æː/ and /ɑː/ with more tenseness than Vilnius city residents, which suggests that the style of the hosts is distinct from the semi-formal speaking style of Vilnius city residents and serves as a well-defined marker of a certain language standard. These findings are in line with some previous studies indicating that vowel tenseness statistically significantly distinguishes programmes covering serious public topics from entertainment-based programmes covering personal topics. Therefore, it can be argued that vowel tenseness differentiates speakers (TV/radio hosts vs. Vilnius city residents), types of programmes (programmes covering serious public topics vs. entertainment-based programmes covering personal topics), styles (formal vs. semi-formal), and language varieties (actual standard language vs. Vilnius speech). Thus, in the speech of hosts of TV/radio programmes covering serious public topics, tenseness acquires the indexical meaning of “I am speaking seriously”. The use of isolated vowels of increased tenseness is thus sufficient to create the impression of a serious speaking style and to form the linguistic identity of a TV/radio host covering serious topics.
Correlation between Albumin, Colon Leakage Score (CLS), and Anastomotic Leakage after Colorectal Cancer Resection
Authors: Rudiman Reno , Hapsari Putie , Indrajaya Novi Christina
Published: January 2023

Anastomotic leakage is still the most undesirable complication of colorectal surgery. The reported incidence of anastomotic leakage after colorectal surgery varies from 1.8% to 15.9%. The impact of anastomotic leakage is increased morbidity, mortality (12–30%), length of stay, and cost of hospitalization; hence, this complication should be prevented as much as possible.Several studies have shown a correlation between low albumin levels and increased anastomotic leakage.The Colon Leakage Score (CLS) is a standard score for predicting anastomotic leakage, but this score does not include the albumin level as a parameter of anastomotic leakage despite the importance of the albumin level’s contribution on the anastomotic leakage. Therefore, this study sought to analyze the correlation between the albumin level, CLS, and the incidence of anastomotic leakage after anastomotic resection surgery in colorectal cancer (CRC) patients at Dr. Hasan Sadikin General Hospital Bandung, Indonesia. This study was a cross-sectional retrospective analytical study on medical records of CRC patients over the age of 18 who underwent intestinal anastomotic resection surgery between 2016–2020. There were thirty-two patients with colorectal cancer underwent anastomotic resection during the study period, with two patients experienced anastomotic leakage. Correlation analysis showed that the correlation coefficient for the albumin level and anastomotic leakage was 0.209, while the correlation coefficient between CLS and anastomotic leakage was 0.110. There is no correlation between albumin level, CLS, and the incidence of anastomotic leakage after anastomotic resection surgery in CRC patients treated at Dr. Hasan Sadikin General Hospital Bandung, Indonesia
Differences in CD95L Levels and Blood Test Results in Primary and Secondary Dengue Infection Patients
Authors: Nurfadly Nurfadly , Zahara Iqrina Widia , Rahmad Said Munazar
Published: January 2023

Dengue is a disease caused by dengue virus (DENV) that is transmitted mainly by the female Aedes aegypti mosquito. There are four serotypes of DEN, leading to a possibility that a person may be infected four times by this virus, albeit with different serotypes. Recovery from infection with one viral serotype provides lifelong immunity to the same serotype but not to the other serotypes. Secondary infection by other serotypes increases the risk of developing severe dengue. The pathogenesis of severe dengue involves apoptosis of microvascular endothelial cells that leads to plasma leakage. In addition, there is usually a decrease in platelets and leukocytes and an increase in hematocrit. This study aimed to compare the results of the CD95L examination involved in the apoptotic process and the results of blood tests in primary and secondary dengue patients. This was a cross-sectional study performed in a four months period  (September–December 2019) involving several clinics and doctor's private practices in Medan, Indonesia. Subjects were eighty-four dengue patients, consisting of 18 (21%) patients with primary infection and 66 (79%) with secondary infection. Data collected were tested with the Mann Whitney test with p-value of <0.05 considered significant. A significant difference (p value=0.007) was observed in the lymphocyte counts between primary and secondary dengue patients, but no differences were seen in CDL95 level, platelet count, leukocyte count, and hematocrit. In conclusion, except for the lymphocyte count, there is no difference in CD95L level and blood test results between primary and secondary dengue patients.
Ukraine in the XIX century: the age of modernization
Authors:   Institute of History of Ukraine NASU, Shandra Valentyna , Arkusha Olena ,   Institute of History of Ukraine NASU
Published: January 2023

The main processes such as industrialization, urbanization, and formation of national identity that determined Ukraine’s history at the transition stage from a traditional agrarian to a contemporary society are reflected. It is shown how scientific and technical educational achievements, socioeconomic transformations, and changes in everyday life revealed to the people of the XIX century new opportunities for the implementation of advanced ideas and own aspirations. Ukraine, despite being a part of two empires — the Romanovs and the Habsburgs — continued its existence primarily in the cultural and intellectual space, thanks to the work of intellectuals during the “long XIX century”, it made its way to the understanding of its history, the creation of modern culture and national-cultural institutions, political unification based on own statehood. For general readers.
“Nunca S. Sebastião esteve assim”
Authors: Martins Ana Claudia Aymoré , Rodrigues Antonio Edmilson Martins , Freitas José Marcos Paula Pessoa
Published: January 2023

O presente artigo tem como objeto a análise das representações da epidemia de varíola que assolou a cidade do Rio de Janeiro em 1908, deixando um saldo de mais de 6.400 mortos, no conto “A peste”, de João do Rio. Exemplo do que Paes (1985) classifica como literatura-esgar de estética art nouveau, o conto publicado originalmente na Gazeta de Notícias e em seguida reunido na coletânea Dentro da noite (1910), tem como narrador principal o esnobe Luciano Torres, o qual relata, a um interlocutor inomeado, o trágico desenrolar da contaminação de seu amado Francisco Nogueira pela varíola. Partindo da premissa de que João do Rio observa o caráter de ruptura epidemiológica (McNEILL, 1998) em seu próprio tempo, a pestilência real transfigura-se em motivo literário significativo, pois, através das representações da peste presentes no conto, o escritor articula a doença e seus processos – difusão, contágio, isolamento, desfiguração, morte – a uma mirada crítica sobre a cidade, para além da perspectiva eufórica da modernização da belle époque; uma visão disfórica (GOMES, 1994), que lê, sob o véu do ideário do progresso, suas mazelas. Nesse sentido, “A peste” revela a condição paralisante de um flâneur diante da cidade vazia (MARTINS, 2021), contaminada pelo “mal das bexigas”: a São Sebastião ferida de morte, regida pelo signo assombroso de Obaluaiê e análoga à experiência catastrófica do campo de batalha.
Terminal Values of the Determinant of Leveling Social Inequality at the Regional Level
Authors: Chashina Zhanna V. , Belkin Aleksey I.
Published: January 2023

Introduction. The article draws attention to the historically existing problem of social inequality. It is noted that the development of a technogenic society objectively requires a moral dominant in solving the issue under study. The purpose of the article is to substantiate, within the framework of the axiological approach, the connection between terminal values and social inequality, in particular at the regional level.

Materials and Methods. The theories of functionalism, conflict, the reputation of leading researchers of the problem of social inequality are the theoretical and methodological basis, as well as the theory of values by the American axiologist M. Rokeach. Statistical-documentary method and social survey data are used as a toolkit.

Results. The article argues that the application of the analyzed approach is an effective way to level social inequality. The main factors of inequalities (health, education, well-being) associated directly with human capital are highlighted. Analysis of the processes of social inequality using the example of the Republic of Mordovia when considering the evolution of four vital areas (income, health, employment, and education) depending on gender and age and territory made it possible to reveal the confusion of legitimate and illegitimate grounds for inequality.

Discussion and Conclusion. The analysis of social and territorial inequality made it possible to present a multidimensional model that includes certain innovations at the methodological level, providing a choice of indicators that clarify social realities, in particular in the Republic of Mordovia, in four areas (health, income, employment and education).
A new occurrence of Gyrodontium sacchari (Spreng.) Hjortstam Pat. (Boletales, Coniophoraceae) expands the geographic distribution of the genus in Brazil
Authors: Leonardo-Silva Lucas , Calaça Francisco J. Simões , Pereira-Silva Geovane , Silva-Neto Carlos de Melo e , Xavier-Santos Solange
Published: January 2023

We report the first occurrence of the genus Gyrodontium Pat. from the Brazilian Cerrado based on our finding of G. sacchari (Spreng.) Hjortstam. This also represents the first record of the family Coniophoraceae from the Midwest Region of central Brazil. We identified the sample by morphological and phylogenetic analyses (ITS gene), and a voucher was deposited in the fungarium of the Universidade Estadual de Goiás (HUEG-Fungi). This record adds to the knowledge of the Cerrado’s funga by providing new phylogenetic and biogeographic data for G. sacchari from a Neotropical region.
Profile monitoring of residuals control charts under gamma regression model
Authors: Mohamed Salah , Mohamed Engy , Abdel Latif Shereen
Published: January 2023

The statistical control chart is considered one of the superlative tools in quality control. Currently, control charts are being widely used in various areas, one of them being manufacturing processes. They are essential instruments that can impart crucial insights to quality controllers for maintaining productivity. The quality of a product or process can be characterized by a relationship between two or more variables, which is typically referred to as a profile. Also, public health surveillance is considered another important area that widely used control charts. In this regard, they are very useful and reliable tools for detecting outbreaks of infectious diseases. On the other hand, the gamma regression model (GRM) is a popular model considered in medical and other fields. It is applied when the response variable is continuous and positively skewed and well fitted to the gamma distribution. This paper presents a scheme for monitoring the profile. Based upon the generalized linear model (GLM) in the case of two link functions: identity and log link function. Exponentially weighted moving average control charts (EWMA) are proposed using deviance residuals and Pearson residuals for detecting any disturbance in the control variable of the gamma regression model. A detailed simulation study is designed to scrutinize and evaluate the performance of the control charts in phase I analysis and in phase II under parametric maximum likelihood estimation (MLE) using the average run length (ARL) measure. It turns out that using deviance residuals under the identity link function seems more suitable than Pearson residuals. Also, with increasing the sample size, the percentages of out-of-control (OC) samples increased which is theoretically acceptable
Development of SME’s business cooperation information technology system design
Authors: Suhartini Suhartini , Mahbubah Nina Aini , Basjir Mochammad
Published: January 2023

The government has a goal to improve the economy of SMEs. The improvement of the SME economy is carried out by accelerating the National digital transformation. At this time, SMEs have become members of the National digital program. SMEs must have the ability to run their business digitally through collaboration. Meanwhile, SMEs still have obstacles in implementing the collaboration system. The obstacle is that it is less effective and efficient to use digital business collaboration systems. Collaboration systems are less effective in the steps and time of use in business collaboration systems. SMEs want an easy and fast collaboration system. SMEs hope to have a collaboration system that can respond to consumer needs. Thus, the design of the collaboration system must meet the needs of SMEs to improve their performance. This research aims to design a collaborative system for SMEs innovation businesses. The collaborative system design is expected to respond to any changes in SMEs activities. By reacting quickly, the productivity of SMEs will increase because an effective collaboration system supports it. This study uses the method of Service Quality and Quality Function Deployment (QFD). Based on the technical response, project description (0.24), project status (0.17), collaboration team (0.16), project activities (0.15), project needs (0.13), special issues (0.07) and project performance (0.06) were selected as the proposed improvement and development by the priority of contribution in the QFD analysis. These attributes are prioritized in designing the SMEs collaboration system. A collaboration system was created for SMEs to increase their productivity
The assessment of reflector material durability for concentrated solar power based on environment exposure and accelerated aging test
Authors: Suyitno Budhi Muliawan , Rahman Reza Abdu , Sukma Hendri , Rahmalina Dwi
Published: January 2023

The reflector durability is essential to maintain suitable photo-to-thermal conversion in concentrated solar power plants. The present study evaluates the impact of environmental exposure and accelerated aging of the reflector material. The study is conducted to assess the reflector material's durability to withstand environmental exposure and accelerated aging test. The evaluation is conducted using four different reflector materials commonly used in concentrated solar power: stainless steel and silvered-glass mirror (solid-state reflector), aluminum and silvered-polymer film (sheet-based reflector). The environmental exposure and accelerated aging test are conducted for 1,080 hours according to the standard reference of ISO 8565:2011 and ASTM B117–11. The mass loss after exposure is used as a reference to determine the corrosion rate for each reflector. Further observation is conducted by using microscope light to observe the effect of exposure on the surface of the reflector. Each reflector indicates a different corrosion rate which implies different weather resistance for each reflector type. The highest corrosion rate is found on aluminum film, with a value of 295.8 g/m2.year. The accelerated aging test through neutral salt spray demonstrates that a metallic reflector has a higher corrosion rate compared to a silvered-glass mirror which uses silicon dioxide as the top coating. Microscope observation demonstrates that suitable protection from soiling elements for the silvered-glass mirror is mainly caused by the presence of silicon dioxide on the top surface of this reflector. The assessment suggests that a suitable coating can be developed to be used for reflector protection. Furthermore, the corrosion mechanism is observed clearly, which can be referred to the synthesis of new reflective material that withstands environment and salt exposure.
Development of an information support methodology for quality assessment of the prepress process
Authors: Hrabovskyi Yevhen , Minukhin Sergii , Brynza Natalia
Published: January 2023

A methodology for improving the information support of the prepress system by introducing new information blocks to prevent errors and predict the final result before the start of prepress operations is presented. Conceptual provisions for assessing the quality of the prepress process have been developed. These conceptual provisions have become the basis for solving the problem of systemic and random errors at the planning stage, created conditions for a significant reduction in prepress time. This parameterized form allows a formal description of operations, the determination of relevant quality indicators based on the formed parameters, and the development of databases and knowledge of the information support system for the anticipatory quality control of prepress.
Classification of factors that affect the quality of the prepress process was carried out. As a result, it is possible to exclude from further consideration the factors that are not important for assessing the prepress quality. The proposed factors form the basis of the knowledge base of the information system for assessing the quality of the prepress process.
The method of “anticipatory” quality control was developed. This method provides the detection of “bottlenecks” in each technological operation of the prepress process, as a result of which random and system errors can be avoided. The resulting indicators of the proposed method are the probability of an error, the probability of error-free execution of the technological operation, the cost of controlling the technological operation, and the cost of eliminating the error.
The information support method for the quality assessment of the prepress process is proposed. Implementation of the developed information support methodology for assessing the quality of the prepress process in the form of an information system for assessing the prepress quality was carried out. This information system allows automating the method of “anticipatory” quality control proposed in this study. Thus, on the example of the technological operation of color correction and color separation by the “CMYK color model” parameter based on the use of the expert knowledge base subsystem, the probability of an error is 1, and the cost of eliminating the error is $ 6.
Calculation of the stressed-strained state of rotating anisotropic cylindrical shells with a hole based on variational RVR-method
Authors: Salo Valentin , Nechiporenko Vladimir , Litovchenko Petr , Rakivnenko Valeriia , Voinov Valerii , Samokvit Vitaly , Ktitorov Maksym
Published: January 2023

This paper proposes a new variational RVR-method for calculating the three-dimensional stressed-strained state of statically loaded shell elements of structures with holes of arbitrary shapes and sizes. The scientifically substantiated RVR method is based on the use of the Reissner variational principle, the Vekua method, the theory of R-functions by Rvachev, and the general equations of the spatial theory of elasticity. The use of mixed Reissner variational principle leads to an increase in the accuracy of solving boundary value problems due to the independent variation of the displacement vector and the stress tensor. The Vekua method makes it possible to replace the solution to a three-dimensional problem with a regular sequence of solutions to two-dimensional problems. The theory of R-functions at the analytical level takes into account the geometric information of boundary value problems, which is necessary for the construction of solution structures that accurately satisfy all boundary conditions. At the same time, the developed algorithm for bilateral integral accuracy assessment makes it possible to automate the search for such a number of approximations in which the process of convergence of solutions becomes stable. The possibilities of the RVR method are shown in numerous examples of solving boundary problems of calculating cylindrical shells with an elliptical hole when setting centrifugal loads according to a deformed scheme. Calculations according to the specified load scheme of the anisotropic cylinder lead (at certain values of the angular velocity of rotation) to a significant increase in stresses. Therefore, to obtain reliable results, it is necessary to set a centrifugal load that takes into account the change in the size of the body in the process of its deformation. The characteristic features of the proposed RVR-method, which can be used effectively in the manufacture of shell elements of structures in various branches of technology, are discussed.
Improving the efficiency of drying Eisenia Fetida by using a technique with induced heat and mass transfer
Authors: Pogozhikh Nikolay , Pak Andrey , Pak Alina , Sychov Andrii , Sychova Tatiana , Sofronova Maryna
Published: January 2023

This paper substantiates the need to rationalize the drying process of such a vermitechnology object as Eisenia Fetida worms to utilize them as feed for industrial animal husbandry and poultry farming. This will contribute to improving the energy efficiency of vermitechnology application in the production of agricultural products.
A technique of drying with the effect of induced heat and mass transfer has been adapted for raw materials with a low amount of dry substances, which is a homogenate of worms. Two adaptation techniques are proposed: drying the homogenate in a heat and mass exchange module with artificially created obturators; drying a mixture of homogenate with grain bran with the spontaneous formation of obturators from raw materials.
Studies of various homogenate drying techniques have established that the longest duration of dehydration is achieved by convective drying technique. This is 1.2 times larger compared to the conductive technique and 2 and 3 times larger than drying with the effect of induced heat and mass transfer depending on the technique of obturator formation. It has been established that the final moisture content of dried products is the smallest for techniques involving the effect of induced heat and mass transfer. It is in 2...3 times less compared to convective and conductive techniques.
Drying with the effect of induced heat and mass transfer of mixtures with the following mass ratio of the homogenate to grain bran was investigated: 1:1; 2:1; 3:1. It was established that for a sample with a ratio of 3:1, the nature of the kinetics of drying is different from the typical kinetics for the effect of induced heat and mass transfer. The consequence is an increase in the duration of dehydration compared to samples of 1:1 and 2:1 by 1.3 times.
The results can be used in agriculture, namely, industrial animal husbandry, poultry farming, and vermitechnology
Experimental investigation and modelling of residual stresses in face milling of Al-6061-T3 using neural network
Authors: Mahdi Basma L. , Dalef Huda H. , Hussein Hiba K.
Published: January 2023

Milling process is a common machining operation that is used in the manufacturing of complex surfaces. Machining-induced residual stresses (RS) have a great impact on the performance of machined components and the surface quality in face milling operations with parameter cutting. The properties of engineering material as well as structural components, specifically fatigue life, deformation, impact resistance, corrosion resistance, and brittle fracture, can all be significantly influenced by residual stresses. Accordingly, controlling the distribution of residual stresses is indeed important to protect the piece and avoid failure. Most of the previous works inspected the material properties, tool parameters, or cutting parameters, but few of them provided the distribution of RS in a direct and singular way. This work focuses on studying and optimizing the effect of cutting speed, feed rate, and depth of cut for 6061-T3 aluminum alloy on the RS of the surface. The optimum values of geometry parameters have been found by using the L27 orthogonal array. Analysis and simulation of RS by using an artificial neural network (ANN) were carried out to predict the RS behavior due to changing machining process parameters. Using ANN to predict the behavior of RS due to changing machining process parameters is presented as a promising method. The milling process produces more RS at high cutting speed, roughly intermediate feed rate, and deeper cut, according to the results. The best residual stress obtained from ANN is ‒135.204 N/mm2 at a cutting depth of 5 mm, feed rate of 0.25 mm/rev and cutting speed of 1,000 rpm. ANN can be considered a powerful tool for estimating residual stress
Determining the relationship between the simulation duration by the discrete element method and the computer system technical characteristics
Authors: Statsenko Volodymyr , Burmistenkov Oleksandr , Bila Tetiana , Statsenko Dmytro
Published: January 2023

The object of this study is the relationship between the technical characteristics of a computing system and the duration of modeling the motion of particles of granular materials by the discrete element method. The scheme of the calculation algorithm is presented; its main stages are analyzed. A 3D model of a belt feeder and a mathematical model of particle motion were developed for calculations by the discrete element method in the EDEM 2017 environment. The physical and mechanical properties of bulk material are defined; the structural and technological parameters of equipment are determined. The parameters of the algorithm and computing system are analyzed. Those parameters are defined, the change of which does not affect the accuracy of calculations but can change the volume of computing resources used. These include the number of particles of loose material, the «grid» step, and the number of processor cores. The influence of these parameters on the duration of simulation was determined using a complete factor experiment.
Experimental studies have shown that for the duration of the simulation, the determining parameters are the number of particles and the number of processor cores. It was established that there is a linear relationship between the duration of the simulation and the number of particles. The regression equation is built, which makes it possible to predict the simulation time. It was also established that the software does not fully use all available computing resources; the maximum load on the processor when utilizing all available cores is 57 %. The use of RAM and disk subsystem almost did not change during simulation.
The results reported here make it possible to plan the use of computing resources for research using the discrete element method and to predict the simulation time
Estimates of the impact of information technology on the tourism supply chain performance in Vietnam
Authors: Nguyen Quoc Nghi , Hoang Thi Hong Loc
Published: January 2023

In the context of the industrial revolution 4.0, information technology (IT) plays an essential role in the supply chain operation. Adopting IT helps companies stay competitive globally. Many researchers have highlighted the influence of IT on supply chain management and performance. It facilitates the linkages between components in the supply chain, minimizes operating costs, and enhances supply chain performance. Furthermore, IT helps increase the speed and quality of information exchange between partners in the supply chain, increasing competitiveness. To develop tourism, the application of information is a prerequisite for success. Currently, most tourism organizations in Vietnam have applied IT in operating their activities. However, new technologies' application and updated processes have not been synchronized. In Vietnam, literature reviews have indicated that there was no research demonstrating the role of IT in the supply chain performance of the tourism industry. This study was conducted to demonstrate the influence of IT on tourism supply chain performance in Vietnam. The level of impact is presented through the intermediary of “information sharing” and “electronic data interchange”. Research data was collected from 154 domestic and international travel agencies. The study has applied structural equation modeling (SEM) to prove the positive impact of IT on information sharing and electronic information exchange, thereby improving the efficiency of the supply chain. Research results have confirmed the significant role of IT in tourism supply chain performance in Vietnam. It concludes that tourism managers need to pay special attention and adequately invest in IT to improve the performance of the tourism supply chain continuously
Construction of a simulation model for calculating the labor intensity of the pre-print process of manufacturing books with audio accompanying
Authors: Horova Tetiana , Paliukh Oleksandr , Zorenko Yaroslav , Oliinyk Volodymir
Published: January 2023

The object of research is preprint processes for the manufacture of audiobooks. The analytical and experimental studies reported here are based on the application of the methodology for devising a simulation model for calculating the complexity of preprint processes in the production of printed books with sound applications. The basic assumption of the study is that the use of simulation will contribute to the improvement of calculations of the complexity of preprint processes for making audiobooks. This cannot be achieved without analyzing the factors influencing the convenience of perception of textual and sound information and establishing the objective function of mutual influence of the text of the publication and audio. A methodology has been proposed for calculating the complexity of the preprint process of making audiobooks based on the developed algorithm of the technological process, mathematical representation of the structural model, as well as its components. It is shown that the process of creating audio accompaniment is affected by the content of printed pages, font design parameters, the selected format of page assembly, and the presence of illustrations. Based on the obtained expert assessments, a hierarchical representation of factors influencing the convenience of information perception is built; the interaction of parameters at different technological stages is described. The dependence of the complexity of the process of making audiobooks on the volume of the book edition in the accounting and publishing sheets, the size and capacity of the font, as well as the speed of sound recording of the printed text, has been established. It is determined that with an increase in font capacity within 200...1000 thousand characters, the calculated labor intensity increases by 5 % to 20 %. The largest limits of changes in the complexity of creating an audio accompaniment are 9 %, at the stage of processing graphic information – 50 %
Designing an object-oriented architecture for the finite element simulation of structural elements
Authors: Hniezdovskyi Oleksii , Kudin Oleksii , Belokon Yuriy , Kruglyak Dmytro , Ilin Sergii
Published: January 2023

This paper reports the development of an architecture and software implementation of the library of classes for the finite-element analysis of problems in the theory of elasticity with an open-source code. The practical necessity of such systems is due to the fact that in modern equipment there are new types of materials whose structural elements' calculation has certain features. As a result, it is necessary to update the relevant scientific software or even devise a new one. A flexible software architecture is designed to reduce the time and complexity of such updates. Existing implementations of the method of finite elements with open source have been analyzed: it was revealed that there are no systems aimed at the most flexible and user-friendly architecture. The system of abstract classes proposed in the current work corresponds to known SOLID principles of object-oriented design and makes it possible to scale the already developed analysis program for new tasks in an easy and understandable way. To test the quality of the developed system from the point of view of software engineering, the maintainability index and cyclomatic complexity code metrics were used. The values of these metrics for the modules of the PyFEM system core vary in the following ranges: from 1 to 18 for the maintainability index, and from 22 to 100 for cyclomatic complexity. PyFEM testing was performed on the task of determining the stressed-strained state of the turbine rotor blade. Due to the ease of implementation, it was possible to build a set of effective and intuitive classes that make it possible to solve numerically the static and dynamic problems in the theory of elasticity. The developed class library can be used in the development of both universal and specialized software designed to analyze multiphysics problems.
Determining quality indicators of table grape varieties during storage in a refrigerating chamber in different variants
Authors: Kazimova İlhama , Nabiyev Ahad
Published: January 2023

This study considers determining the quality indicators of table grape varieties when stored in a refrigerating chamber for different variants. The objects were white table grape variety, widely used in Azerbaijan, Ganja table grape variety, pink grape variety – Marandi Shamakhi, as well as the red grape variety Black Asma. Grape varieties stored in the refrigerator were studied according to five options.
Table grape varieties were  stored in  a refrigerating chamber under conditions  of an adjustable gas environment (3–4 % CO2, 2–3 % О2) at a temperature of –1 and –2 °C, with air humidity of 90–95 %. It was found that at a temperature inside the pulp of 0+1 °C, the activity of enzymes decreased significantly compared to other options. In addition to the enzyme ascorbate oxidase, the activity of the studied enzymes o-diphenol oxidase, peroxidase, and catalase  was 100 % suppressed  in the Marandi Shamakhi grape variety. The inactivation of enzyme activity prevented the consumption during respiration of the nutrients that make up the grapes. As a result of slowing down metabolic processes, the appearance, naturalness, and nutritional value of the Marandi Shamakhi grape variety are significantly superior to other varieties.
When storing grape varieties according to option 5, the smallest total losses were observed in the Marandi Shamakhi grape variety. Very few microbiological losses were detected during the storage of the Marandi Shamakhi grape variety compared to other variants and varieties. It was stored in a refrigerating chamber in a controlled gas environment (3...4 % CO2, 2–3 % О2, at the temperature of the chamber of –2…–3 °C). A tasting was also carried out to determine the quality indicators when storing grape varieties in different versions; for version 5, the assessment was high
Experimental evaluation of the performance of a domestic water heating system under Baghdad climate conditions
Authors: H. Attia Osam , T. Al- Musawi Sanaa , A. Mousa Naseer , A. Mahmood Hussein , Adam Nor Mariah
Published: January 2023

The aim of the current study is to evaluate the performance of a domestic water heating system for residential areas in Baghdad climatic conditions for substituting electric water heaters with solar-powered water heaters using solar collectors. Many countries, such as Iraq, are sluggish with electric power issues while receiving very high solar insolation. Solar energy is a clean, non-depleting and low-cost source that can be used especially in residential areas, which forms a great percentage of energy consumption by replacing electric water heating with solar water heating to reduce electricity usage. Therefore, six flat plate solar collectors with an absorbing area of 1.92×0.85 m with one 4 mm thick glass cover are utilized for experimental investigation under the Baghdad climatic conditions. The collector was tested under steady-state settings, which assumed that sunlight intensity, ambient temperature, and inlet-outdoor temperature difference in each collector in the system were constant throughout the operation. According to the experimental results, during the test months of November, December, January, and February, the time-weighted experimental daily average collector array efficiency is found in the range of 40 % to 60 %. Furthermore, the greater energy gain and performance of the solar collector array attain a peak value at solar noon. Additionally, a solar collector with flat plates can easily achieve relatively high water temperature levels of 70 °C in the winter season. In addition, using a solar domestic hot water system as a water heater in Baghdad climatic conditions by substituting electric water heaters is useful for saving power consumption
Impact of the profile of public-private partnership projects on the economic potential of Central Asian countries
Authors: Tireuov Kanat , Mizanbekova Salima , Aitmukhanbetova Damira
Published: January 2023

The object of this study were projects based on public-private partnership. The results of the state of public-private partnership projects in various sectors of the economy of the Central Asian countries and the assessment of the prospects for their development are presented.
The study uses a comparative public-private partnership project and a forecast analysis of the economic performance of the economies of the Central Asian countries.
A comparative analysis revealed the predominant areas of public-private partnership projects. The Republic of Kazakhstan is ahead of other Central Asian countries in the implementation of public-private partnership projects with a total cost of USD 2. 863 billion. There are 136 projects in the Republic of Uzbekistan, dominated by the sphere of housing and communal services (collection, removal, sorting, and processing of solid household waste) and the field of culture and sports. There are three agricultural projects in the Kyrgyz Republic. In the Republic of Tajikistan, 32 projects are being developed, mainly aimed at the development of transport infrastructure. Turkmenistan is implementing two projects related to transport infrastructure and manufacturing.
Forecast analysis of economic indicators of countries makes it possible to identify the prerequisites for the use of market mechanisms to improve the agriculture of countries and the prospects for development from implementation for the agro-industrial complex of the Republic of Kazakhstan. The most important task of the strategic development of countries with commodity economies is to increase food security. The creation of favorable conditions for the development of economic relations between the state and the private sector is inextricably linked with the need to provide state support measures and legal regulation
Development of a method for ensuring confidentiality and authenticity in wireless channels
Authors: Yevseiev Serhii , Korolev Roman , Koval Mykhailo , Rzayev Khazail , Voitko Oleksandr , Akhiiezer Olena , Hrebeniuk Alla , Milevskyi Stanislav , Baghirov Elnur , Mammadov Musa
Published: January 2023

The object of the research is the development of a method for ensuring the authenticity and integrity of data in wireless channels based on post-quantum cryptosystems. The development of modern digital technologies ensures the transition to smart technologies and the formation of Next Generation Networks. The formation of smart technologies, as a rule, uses wireless communication channel standards IEEE 802.11X, IEEE 802.15.4, IEEE 802.16, which use only authentication protocols and privacy mechanisms, which are formed on symmetric algorithms. In the conditions of the post-quantum period (the advent of a full-scale quantum computer), the stability of such algorithms is questioned. Such systems, as a rule, are formed on the basis of the synthesis of socio-cyber-physical systems and cloud technologies, which simplifies the conduct of Advanced Persistent Threat attacks, both on the internal circuit of execution systems and on external control systems. The creation of multi-circuit information protection systems allows for an objective assessment of the current state of the system as a whole and the formation of preventive measures to counter cyber threats. The proposed method of providing basic security services: confidentiality, integrity and authenticity based on crypto-code constructions takes into account the level of secrecy of information transmitted over wireless channels and/or stored in databases of socio-cyber-physical systems. The use of post-quantum algorithms – McEliece/Niederreiter crypto-code constructions on elliptic/modified elliptic/lossy/Low-density parity-check code provides the necessary level of stability in the post-quantum cryptoperiod (crypto-stability at the level of 1025–1035 group operations), speed and probability of information (Рerr not lower than 10-9–10-12). The proposed method of information exchange using wireless communication channels ensures their practical implementation on resource-limited devices (creating of CCC on the GF field (24–26).
A time-frequency approach to ensuring stability of machining by turning
Authors: Petrakov Yuri , Danylchenko Mariia
Published: January 2023

This paper reports a new approach to ensuring the stability of the turning process, which is based on the frequency-time characteristics of the technological machining system (TMS). The approach uses a mathematical model of the turning process as a single-mass system with one degree of freedom, taking into account negative feedback on the normal coordinate and positive feedback with a delay in cutting depth. A new criterion for the stability of the cutting process as a system with a delay in positive feedback is proposed, based on the analysis of frequency characteristics in the form of a Nyquist diagram. It is proved that such a system will be stable when the chart of its Nyquist diagram does not cover a point with coordinates [+1, 0] on the complex plane. The validity of the new criterion has been confirmed by comparing the simulation results in the time range with the location of the Nyquist diagram on the complex plane. Based on the new criterion of stability, an algorithm for automatic construction of a Stability Lobes Diagram (SLD) has been developed. The necessary a priori parameters of TMS, the ranges of frequency change, and the calculation step for constructing such a characteristic in the coordinates "cutting depth – spindle rotational speed" have been determined. The adequacy of the obtained results is confirmed by a full-scale experiment to assess the roughness of machined parts under cutting modes that fall into the area of stability and instability on the SLD chart. The full-scale experiment proved the possibility of a significant reduction in roughness according to the Rz parameter, from 43 µm to 18 µm, while increasing productivity by 1.28 times. The use of a stability lobes diagram is especially effective when programming CNC lathes where it is possible to select the spindle speed in a wide range.