bluuebunny/crossref_metadata_2025 huggingface dataset:
Determination of the Residual Strength of a Polyamide Rope 24 Months after Exposure to Strong Acids
Authors:   Moscow State University of Civil Engineering, Gadzhiev R.S. , Antonova V.A. ,   Moscow State University of Civil Engineering, Prostakishin D.A. ,   Moscow State University of Civil Engineering, Karaseva T.A. ,   OOO BASK
Published: November 2022

The article is the result of two years of research on the effect of strong acids on the residual strength of polyamide rope. To observe the degradation of rope strength, all the work was divided into several time stages, at each of which the condition of the polyamide rope was assessed, and its residual strength was determined. Solutions of sulfuric and hydrochloric acids, which are often part of the household detergents, were selected for the study. These products are used by the glass and facade cleaners to remove heavy dirt. The study examined samples that were exposed to strong acids 24 months ago, conducted a visual inspection and strength check. During the visual inspection of the samples, a white coating, and traces of destruction of the braid and part of the core were recorded. On a static stand, the residual strength of the samples was determined, for which the average value of the residual strength was calculated. For samples exposed to hydrochloric acid, the average value of residual strength was 3.67 kN, and for sulfuric acid — 3.09 kN. When compared with the previous stage of the study, the loss of strength turned out to be insignificant, and visual inspection made it clear that it is required to pay attention to the effect of acids at the early stages of contact, and to conduct daily inspection controls during work. Based on the data obtained, it was revealed that the strength of the rope drops significantly already 5 days after exposure to acids, the decrease in strength for the 10th month is more than 50%, while further indicators of strength loss are insignificant. From a visual point of view, defects in the final stages of the study are not hidden, and clearly demonstrate the destruction of the rope.
Optimization of the Underground Ore Mining Technology by Occupational Safety Criteria
Authors:   SRSPU (NPI), Golik V.I. ,   Moscow Polytechnic University, Razorenov Yu.I. ,   SRSPU (NPI), Maslennikov S.A. ,   The Institute of Service Sector and Entrepreneurship (branch) of Don State Technical University, Khasheva Z.M. ,   Kuban State Technological University
Published: November 2022

The issue was studied concerning the optimization of the operating mode of a mining enterprise for improving the safety of miners by mathematical programming of the underground mining production processes. An increased hazard of the mineral deposits underground mining is noted as a compromise between the state of the developed space and the cost of maintaining it with alternative mining options. The use of hardening mixtures based on ore tailings after the extraction of metals from them becomes a condition for the safety of underground mining of powerful deposits, for example, stockwork type. The results are presented related to the analytical study of the dependence of ore mining costs on the compared options for managing the state of the mined space. The study was carried out by finding the optimal points for the objective functions and choosing the values of independent factors. A mathematical model was developed for analyzing the elements of the production process using the Maple software package. It provides an opportunity to consider the differences between alternative mining technologies and compare their cost-efficiency with consideration to costs of ensuring the safety of workers. For independent variables, a mathematical model was developed that allows only significant variable factors to be left. It is proved that within the framework of a numerical experiment using actual data it is possible to develop a mathematical model that takes into account the influence of independent factors. The prospects are outlined concerning the use of the modeling method to substantiate technologies at these stages of design and operation, as well as to assess the economic efficiency and occupational safety in the underground mining of ore deposits. At the same time, the maximum extraction of a useful component from the subsoil should be ensured at all stages of the reserve development.
The Results of the Implementation of a Set of Measures for Ensuring the Microclimatic Parameters of the Mine Atmosphere at the Facilities of Yareganeft Oil Mine Production Enterprise LLC LUKOIL-Komi
Authors:   PJSC LUKOIL, Zaikin I.A. , Abashin A.N. ,   PJSC LUKOIL, Lizan I.Ya. ,   LLC LUKOIL-Komi
Published: November 2022

The Yarega field is currently the only one in Russia where oil production is carried out by the thermal mining method. The deposit was discovered in 1932, and it is located in the southern part of the Timan-Pechora province, in the Ukhta district of the Komi Republic. The oil of the Yarega field has a high viscosity, and in order to ensure its production, the oil-bearing formation is thermally affected by steam supply through steam-falling (injection) wells into the rock mass. Depending on the development system used, steam injection can be carried out both through surface vertical wells and through underground hollow ascending wells. A combination of these methods is also possible. The heated oil-containing liquid from the producing wells located in the underground mining galleries of the mine is delivered to the surface using the existing collection and transportation system. The uniqueness of the technology of thermal mining production of heavy oil creates additional difficulties in the development of various technical solutions due to the lack of experience in operating such objects in Russia. This oil extraction technology is accompanied by an increase in the temperature and humidity of the mine atmosphere in mine workings, due to the presence of heat sources and areas where steam enters the mine working. Despite the applied technical solutions (increasing ventilation performance, cooling the air by spraying cold water, erecting additional concrete fasteners), there is a possibility of the microclimatic parameters of the air in the mine workings going beyond the established limits. In order to normalize the parameters of the mine atmosphere, a whole complex of technical and organized measures is being implemented, including thermal insulation of heat sources using modern materials. The article discusses various technologies for the use of thermal insulation coatings, analyzes their efficiency and offers solutions for choosing the optimal ways to reduce the temperature and humidity of air in the mine workings.
Influence of Faults on the System of Advanced Degassing of the Designed Mir Mine
Authors:   Institute «Yakutniproalmaz», Yannikov A.M. , Yannikova S.A. ,   Institute «Yakutniproalmaz», Kharchenko A.V. ,   IPCON RAN
Published: November 2022

Aspects of the gas content of the host rocks of the bedrock diamond deposit of the Mir kimberlite pipe are considered. The intervals of gas-saturated reservoirs in the interval of the Tolbachan were studied and identified, the effect of discontinuous disturbances on their fluid saturation is given. The research results allow to predict the nature of gas occurrences and the amount of reservoir gases during the mining of the Mir tube indigenous diamond deposit in the Tolbachan formation interval. The efficiency of the proposed method of degassing host rocks is confirmed by the already achieved significant (20–30 times) drop in the flow rates of observed gas manifestations at analogous deposits, and the absence of cases of gassing in the opening workings and stopes of mines over the past 3–5 years. Degassing of host rocks is carried out in two stages. At the first stage, a circular system of vertical leading wells is drilled to the full capacity of the production block. Calculations showed as follows: the system of advanced degassing of reservoirs of the Tolbachan should consist of 64 wells with a depth of 350 m each. To ensure safe mining, drilling of holes should be carried out directly from the underground mine workings, using blowout control equipment designed for a pressure of 225–250 kgf/cm2. Subsequently, the residual pressure in the massif will not exceed 30–40 kgf/cm2, which will allow to move on to the second stage of massif unloading — drilling of slightly inclined wells directly from the faces of the underground mine workings under construction.
New Approaches to the Choice of Personal Protective Equipment against the Impact of Vibroacoustic Factors at the Workplace
Authors:   Federal State Budgetary Institution «All Russian Research Institute of Labor» of the Ministry of Labor, Ilin S.M. , Samarskaya N.A. ,   Federal State Budgetary Institution «All Russian Research Institute of Labor» of the Ministry of Labor, Simanovich S.V. ,   Federal State Budgetary Institution «All Russian Research Institute of Labor» of the Ministry of Labor, Khomenko A.O. ,   Ural Federal University named after the first President of Russia B.N. Yeltsin, Yakshina N.V. ,   Ural Federal University named after the first President of Russia B.N. Yeltsin
Published: November 2022

An assessment of the experts of the World Health Organization on the main groups of occupational diseases associated with the impact of industrial physical factors is presented in the article. The analysis was carried out related to the influence of vibroacoustic factors on the health and working capacity of industrial enterprise employees. The importance is substantiated concerning the choice of the personal protective equipment and the development of the activities that can increase the level of safety and harmlessness to the employee health under the influence of vibroacoustic factors at the workplaces. It is emphasized that an important step towards prevention of accidents at work and the development of occupational diseases among the employees associated with the impact of vibroacoustic factors is the occupational risk management system. A list of personal protective equipment for employees against noise and vibration was defined, and an approach was proposed for choosing protective equipment and reducing the negative impact of noise, vibration, infrasound, and ultrasound, based on an analysis of occupational risks. The procedure for determining personal protective equipment against the action of vibroacoustic factors should be included in the occupational risk management system to increase the efficiency of annual activities on protecting the life and health of the enterprise employees. To identify hazards and assess the levels of occupational risks, it is required to recommend the creation at the enterprise by a local regulatory act of commissions, or groups on assessing occupational risks at the workplaces, as well as a unified system for collecting and analyzing data on hazardous and harmful production factors, violations of labor discipline, deviations from the requirements of instructions on occupational safety, microtrauma, technical incidents, accidental events and emergency situations. It is required to introduce into the occupational safety management system the proposals for the organization of activities for the periodic review of occupational risk levels at the workplaces and units based on the application of a unified methodology and principles for identifying hazards.
Empirical Validity of the Method of Remote Measurement of the PsyFace Performance Level in a Smartphone Application
Authors:   LLC «ALGA», Ermolaev V.V. , Voroncova J. ,   JSC «Neurocom», Chetverikova A.I. ,   LLC Center for Innovative Technologies «Transport Psychology and Security», Nasonova D.K. ,   LLC Center for Innovative Technologies «Transport Psychology and Security», Simakov A.V. ,   LLC A-Data
Published: November 2022

The problem of the implementation of a preventive strategy in reducing the role of the human factor in the accident rate at hazardous production facilities through remote monitoring of the level of employee performance is considered. The purpose of the study is to establish the empirical validity of the method of operational remote measurement for the performance capacity level of employees with PsyFace smartphone application. The developed method of operational remote measurement of the PsyFace performance level is based on the modification of Landolt performance diagnostics method under adaptation of V.N. Sysoev. Statistical analysis of the data was carried out in the SPSS Statistics 23 program using the non-parametric r-Spearman rank correlation test. Sample: 256 professional drivers (male) aged 22 to 60 years. The PsyFace method has the necessary empirical validity for diagnosing such performance indicators as productivity, which determines the amount of information processed per unit of time (r = 0.376 at p  0.05), average accuracy, which determines the error-free performance of activities (r = 0.290 at p  0.05) and reliability, which determines the probability of maintaining a given performance for a given time (r = 0.284 at p  0.05). The PsyFace methodology has great practical potential for its application among employees of hazardous professions and industries and fully complies with the principles of a preventive response strategy to reduce the risks of the human factor, designated by the Russian Ministry of Labor the Russian Federation. The developed PsyFace methodology in a smartphone application can be used by the company management to ensure employee performance monitoring during a work shift, including remotely.
The Impact of Immediate Sales Promotion Techniques on Brand Recall: Study on Middle Income Group Residents in Riyadh
Authors: Al-Sahli Saud A.
Published: November 2022

The study aimed to resolve the impact of immediate sales promotion techniques on brand recall. The independent variable is divided into three sub-variables: price reductions, free samples, and purchasing vouchers. The research population is all foreign workers in the private sector in Riyadh. The figures show that the population size reached 3.4 million in 2021. A proportional stratification method was used, and the recommended sample size was 387 customers. The study concludes that a statistical impact of free samples on brand recall and there was no impact of immediate techniques on brand recall. Finally, the study presented and recommended a set of marketing implications to develop the uses of sales promotion techniques in retail stores.
Lunar Phases Refutation Texts: Suplement Texts to Overcome Students’ Misconceptions
Authors: Syuhendri Syuhendri , Siahaan Sardianto M. , Pasaribu Abidin
Published: November 2022

The purpose of this research is to develop a set of refutation texts as supplement texts to overcome misconceptions and to improve conceptual understandings on the Lunar phases. The method used is research and development in education. Overall, the research consists of three stages, namely preliminary study, product development, and evaluation. The refutation text was developed based on Posner et al. (1982) conceptual change model. The results for the preliminary study stage obtained nine prototype of refutation texts, namely for the concepts of the Earth’s natural satellite, the source of moonlight, the rotation and revolution of the earth, the rotation and revolution of the Moon, the direction of the daily motion of the Moon, Lunar phases, solar eclipses, Lunar eclipses, and causes of the tides. A set of refutation texts can be used in teaching the Lunar phase material in high school. Further research is needed to see the effectiveness of the Lunar phase refutation text in remediating students’ misconceptions and increasing their concept understanding and the longevity of the substitute concepts.
Smart Agriculture Robot Controlling using Bluetooth
Authors: Al Rakib Md Abdullah , Rahman Md. Moklesur , Uddin Salah , Khan Md. Adnan Hossain , Rahman Md. Ashiqur , Hossain Md. Miraj , Samad Mousume , Abbas Fysol Ibna
Published: November 2022

Agriculture is critical to the growth of an agricultural country. Agriculture-related issues have traditionally hampered the country's progress. The only answer to this challenge is smart agriculture, which involves upgrading conventional agricultural processes. When the signal reaches the Arduino, it will send a command to the relay of that specific line field valve to activate it in order to open the valve, as well as a command to the relay of the pump to exchange it directly in order to irrigate that field. Also, if two or three of the three plants' moisture sensors are operational, all three fields can be watered at the same time. As a result, all solenoid valve relays may be activated to open all valves, and the pump can operate to water all three plants. Choosing a proper pump to paint to water all flowers at the same time was an issue at first. The system's software has been set, and the system will no longer function unless (or three moisture sensors) are engaged. However, if one sensor of any line is engaged, the system will no longer function since that sensor may also be malfunctioning. If the water tank level is too low, the system will not function at all, even when all plant sensors are enabled to safeguard the water pump.
Computer Simulation to Determine LHP of 4 Different Types of Transient Industrial Quenched Molybdenum Steel Bars
Authors: Rahel Rahel G. , Elmaryami Abdlmanam S. A. , Ahmida Mahmoud Abdelrazek , Haj Ahmed Abdalsalam A. A.
Published: November 2022

Simulation of hardness distribution in quenched specimens has been investigated using three-dimensional finite-element (FE) analyses which reduced into a 2-dimensional axisymmetric analysis based on Ansys Software capable of predicting temperature history; evolution hardness of four different types of Molybdenum steel bars during thermal processing of materials in quenching process is presented. The Jominy test results are used to estimate specimen hardness. specimen points hardness used to be determined through conversion of evaluated characteristic cooling time for phase transformation t8/5 into hardness. The lowest hardness point (LHP) of each quenched Molybdenum steel bar has been determined to be in mid its length in the center. Experimentally, it is quite impossible to determine this hardness value, and earlier approaches could only assess surface hardness. Normally, this value of hardness at the surface is greater than (LHP), that, under certain conditions might lead to component failure and deformation. The model can be employed to establish a cooling method to attain the required microstructure as well as mechanical properties, which include hardness.
Validity of Physics Mobile Learning Media Edupark of Bayangsani South Coast Fluid on Fluid Material for High School Students Using the Android Studio Application
Authors: Wulandari Adek , Hamdi -
Published: November 2022

This study aims to produce a mobile learning media using an android studio application based on edupark physics waterfall Bayangsani Pesisir Selatan on fluid material for high school students and find out the validity level. This type of research is development research using the Plomp model. The data source of this study was a validator team consisting of three lecturers from the Department of Physics Faculty of Mathematics and Natural Sciences UNP. The research instrument used in this study was an initial observation questionnaire for students and teachers, as well as a validation instrument. The data analysis technique used in this research is descriptive statistical techniques. Based on the results of data analysis that has been done, it can be concluded that the mobile learning media using android studio applications based on edupark physics has a validity value of 82.43 with a very valid category. The validity of the characteristics of this media product is assessed in terms of material substance, learning design, display (visual communication), and software utilization
Meta Analysis of The Influence of Problem Based Learning Models in High School Physics Students on Student Learning Outcomes
Authors: Nora Arjuna , Asrizal -
Published: November 2022

The purpose of this research was to determine the effect size of the use of problem-based learning models in five categories, namely class level, material, aspects of knowledge, aspect of critical thinking skills, and aspects of problem solving skills. The method used in this research is meta-analysis. Data analyzed is secondary data obtained from the previous research. The sample of this research consists of 18 national articles and 2 international articles . The instrument used is the category code and the calculation of the size of the effect. Data analysis techniques in this study using the calculated effect size of each article. The results showed that the influence of the use of problem based learning model on the level of class X with the average of 1.22 in a category very high. Although, on the level of class XI with an average of 1,95 in the category of very high. Second, the influence of problem-based learning on the electric dynamic, motion, heat and temperature, and optical geometric was high. Moreover, Newton's Law is very high. Third, the influence of the problem-based learning model, on aspects of knowledge in the category of very high, aspects of critical thinking skills including high category, and aspects of skills problem solving belongs to the category of high
META-ANALYSIS OF THE EFFECT OF THE USE OF JIGSAW TYPE COOPERATIVE MODEL ON STUDENT LEARNING OUTCOMES IN LEARNING NATURAL SCIENCE IN JUNIOR HIGH SCHOOL AND PHYSICS IN SENIOR HIGH SCHOOL
Authors: Zuler Atika Dwi Maharani , Desnita - , Murtiani - , Darvina Yenni
Published: November 2022

This meta-analysis study aims to analyze the effect size of the use of the jigsaw cooperative model based on education level, material units, and aspects of learning outcomes including knowledge, attitudes, and skills.  The research method used is a meta-analysis of 25 articles that have been published in various national and international journals and proceedings. The results of this study are as follows: (1) The use of the type cooperative model jigsaw in improving learning outcomes based on education level, more have an effect on the high school level; (2) The use of the jigsaw type cooperative model in improve learning outcome based on material units, more influential on units optics and thermodynamics material for high school level and affect the unit thermodynamics and vibration & wave materials for junior high school level; (3) The use of the type cooperative model jigsaw in improving learning outcomes has an effect on aspects of attitude, knowledge, and skills.
Misconception Analysis in The Teaching Book of High School Physics and Edupark Mifan Waterpark and Geopark Ngarai Sianok in Dynamic Fluid Material
Authors: Putra Dio Ade , Hamdi - , Sari Silvi Yulia , Hidayati - , Sari Dewi Puspa
Published: November 2022

The cause of errors and misconceptions experienced by some students and students is the large number of literature or books that describe the concept inappropriately. Writing difficult equations is also a factor in students' misunderstanding. So, misconceptions must be detected as soon as possible, especially in one of the causes, namely textbooks. This study aims to determine whether there are misconceptions in high school physics textbooks and physics edupark textbooks for class XI dynamic fluid material and to find out whether there are indications of other information that have the potential to cause misconceptions in textbooks.This research was a qualitative descriptive study that provides an interpretation of the data obtained rationally and objectively. In this study, data collection techniques were carried out by literature study and interviews with a team of physicists. The data source of this research was the physics textbook of Class XI high school by Marthen Kanginan in 2016 and the edupark physics textbook, while the data was the physics concept on dynamic fluid material. Credibility and triangulation techniques were used to determine the validity / validity of the data. Based on data analysis, conclusions can be drawn. Namely, there were misconceptions in book 2, while books 1 and 3 did not have any. Apart from misconceptions, the results of identification of other information were found, namely incomplete concepts, concepts that allow misconceptions, improving images, improving formulation writing, improving sentence writing, improving notation writing. The three books studied had the same findings of other information that led to misconceptions, namely on average there were 1 improvements for each indication found
Sclerosing encapsulating peritonitis in a dog
Authors:   Federal University of Paraná (UFPR), Fontana Carolina , Novaski Eliane ,   Federal University of Paraná (UFPR), Montagnini Karin ,   Federal University of Paraná (UFPR), Lima Simone ,   Federal University of Paraná (UFPR), Druziani Juliana ,   Federal University of Paraná (UFPR), dos Santos Elton ,   Federal University of Paraná (UFPR), Vizzu Juliana ,   Federal University of Paraná (UFPR), de Carvalho Giovane ,   Federal University of Paraná (UFPR), Quinagli Giovane ,   Federal University of Paraná (UFPR), de Mattos Monica ,   Pontifical Catholic University of Paraná (PUC-PR), Fukushima Fabiola ,   Federal University of Paraná (UFPR), da Cunha Olicies ,   Federal University of Paraná (UFPR), Oyafuso Monica ,   Federal University of Paraná (UFPR), Pavelski Mariana ,   Federal University of Paraná (UFPR), Viott Aline ,   Federal University of Paraná (UFPR)
Published: November 2022

Sclerosing encapsulating peritonitis (SEP) is a rare condition which consists of reactive fibrous tissue proliferation with mixed inflammatory infiltration within the abdominal cavity. The present report describes an additional case of SEP affecting a mixed-breed immature female dog presented with persistent vomiting, progressive weight loss, and ascites. Abdominal radiographic and ultrasonographic findings suggested abdominal neoformation resulting in gastric displacement, in addition ascitic fluid was evaluated and cytology showed large numbers of inflammatory effusion. An exploratory laparotomy was performed and were detected multiple thick peritoneal adhesions which restricted mobility of abdominal viscera. Biopsy specimens of these lesions were submitted for histopathological examination. Microscopically, the external serous surfaces of the abdominal organs were covered with dense fibrous connective tissue characterized by intense mature collagen deposition and moderate angiogenesis. The animal was euthanized due to poor prognosis and sent for necropsy. The clinical, imaging, gross and microscopic findings were compatible with SEP. Keywords: Neoformation; intestinal obstruction; peritoneal adhesions, chronic inflammation.
Metastatic calcification and nephrosclerosis in an adult sloth (Choloepus hoffmani)
Authors:   Universidad Veritas, Costa Rica., Olivares Roberto , Brautigäm Andrés ,   Toucan Rescue Ranch
Published: November 2022

Clinical History: Multiple fragments of various organs from the necropsy of an adult sloth (Choloepus hoffmani) were received. The animal, prior to its death, had presented decay and poor general body condition, which is why it was euthanized. Necropsy Findings: According to the referring veterinarian, at necropsy, irregular and locally extensive hard yellowish lesions, were observed in the subcutaneous tissue of the thorax and abdomen. Similar lesions were observed in the tunica media of the aorta.
KAJIAN FASILITAS PENYEBERANGAN SEKOLAH PADA KAWASAN PUSAT PENDIDIKAN JALAN KI. HAJAR DEWANTARA KOTA METRO
Authors: Sriharyani Leni , Kurniawan Septyanto
Published: November 2022

Daerah kampus Jalan Ki Hajar Dewantara merupakan kawasan pusat Pendidikan, dimana di area tersebut  terdapat sekolah mulai  dari tingkat taman kanak-kanak, sekolah dasar, sekolah menengah pertama, sekolah menengah atas hingga perguruan tinggi. Letak gedungnya jaraknya sangat dekat. Volume lalu lintas pada saat jam sekolah yakni pagi dan sore sangatlah tinggi. Pengguna jalan baik pengendara kendaraan maupun pejalan kaki sama-sama menggunakan haknya di jam tersebut. Kesemrawutan terjadi terutama pada saat jam masuk sekolah dan jam pulang sekolah. Pada Kawasan ini minim sekali fasilitas penyeberangan bagi pejalan kaki, sehingga keamanan dan keselamatan pejalan kaki terutama anak-anak sekolah  belum dapat terlindungi.   Metode yang digunakan pada penelitian ini adalah metode pengumpulan data dengan melakukan pengamatan dan observasi langsung di lapangan berupa survei perilaku penyeberang jalan, survei perilaku pengantar sekolah, survei kecepatan sesaat, survei volume lalu lintas dan kapasitas jalan.Dari hasil analisis yang telah dilakukan berdasarkan empat parameter, menunjukkan kondisi yang belum selamat, maka pada sekolah-sekolah yang berada di Jalan Ki. Hajar Dewantara yakni : (1) TK PGRI Iringmulyo, (2) SDN2 Metro Timur, (3) SMPN2 Metro, (4) MAN 1 Metro , perlu diterapkan ZoSS. Tingkat pelayanan jalan (Level of Service) ruas jalan Ki. Hajar Dewantara termasuk dalam kategori B yaitu Arus stabil, tetapi kecepatan operasi mulai dibatasi oleh kondisi lalu lintas.
Innovative technologies for processing combined fish and vegetable raw materials
Authors: Lebedeva Ekaterina Yuryevna , Kasyanov Gennady Ivanovich
Published: November 2022

The article considers the innovative techniques of processing the agro-food raw materials. There has been analyzed a structural scheme of processing plant and animal raw materials using modern technologies. The review of scientific, technical and patent literature was done, which allowed to define the main directions of further research in the field of complex processing of fish and vegetable raw materials. The stages of transition from traditional agro-food technologies to energy-saving ones have been formulated. Methods of enriching fish and vegetable products with protein hydrolysates obtained from low-value fish meat have been described. It is proposed to use CO2 extracts from spicy-aromatic and medicinal herbal raw materials as antioxidant enriching agents. To remove the excess moisture from fish and vegetable raw materials, it is recommended to use heated inert gases as drying agents under the influence of a low-frequency electromagnetic field. High-tech techniques include using the light water products with a reduced deuterium content in formulations, enriching the chemical composition of products with CO2 extracts of spices, processing the raw materials with argon and a low-frequency electromagnetic field, using the biodegradable packaging materials.
Evaluasi dan Perancangan Ulang Tampilan Antarmuka Aplikasi SehatQ Terhadap Lansia
Authors: Duma Konda Valerius Wesley , Restyandito Restyandito , Nugraha Kristian Adi
Published: November 2022

Penelitian ini berfokus pada rancangan desain ulang antarmuka aplikasi SehatQ yang baik bagi lansia dengan umur 60 tahun ke atas. Tujuan dari penelitian ini adalah membangun ulang antarmuka aplikasi SehatQ yang lebih user friendly pada lansia. Objek yang digunakan dalam penelitian ini adalah antarmuka aplikasi SehatQ v1.24.0, dimana di dalam aplikasi ini ditemukan beberapa kesalahan dalam desain antarmuka sehingga penggunaannya dapat menyulitkan lansia. Menurut ISO 9241-11, evaluasi kualitas dapat dilakukan dengan menghitung effectiveness, efficiency, dan satisfaction. Penelitian ini juga menggunakan metode User Centered Design atau UCD untuk mengetahui apa saja kebutuhan lansia terhadap antarmuka aplikasi sehingga penelitian dapat dikatakan tepat sasaran. Dari hasil pengujian usability pada antarmuka yang didesain ulang, ditemukan peningkatan nilai persentase efektivitas, efisiensi, dan kepuasan. Dengan peningkatan tersebut, dapat disimpulkan bahwa hasil desain ulang antarmuka aplikasi SehatQ dapat diterima oleh pengguna lansia.
The First Freshmen Students’ University Test of English Proficiency: A Descriptive and Correlational Study
Authors: Prasodjo Pandu , Sally Sally
Published: November 2022

Listening and reading play an essential role in students learning English as a foreign language. Recognizing freshmen students’ English language proficiency through the University Test of English Proficiency (UTEP) helps the university to portray the batch performance and decide future policies and teaching strategies for the English lesson. This is important for the EFL teachers developing teaching strategies that are suitable for students. However, a study to describe the current phenomena of the first freshmen students and the existence of the relationship between UTEP listening and reading proficiency scores also needed to be conducted for the sake of UTEP's continuous improvement as an assessment instrument. Therefore, the present study aims to (1) investigate the descriptive statistics of the current batch first UTEP; and (2) find out the existing relationship between freshmen students’ UTEP reading and listening proficiency scores. A quantitative method was applied to describe the current UTEP scores statistically and to find out the degree of correlation coefficient of freshmen students’ first UTEP. The data was collected from 863 freshmen students who took their first UTEP and statistically analyzed using SPSS version 26. The results revealed that there is a positive and quite strong relationship between freshmen students’ UTEP reading and listening proficiency scores. Finally, this report could be used for further consideration for stakeholders in developing teaching strategies for the batch and evaluating the current UTEP for encouraging better tests and continuous improvement to enhance graduates’ English language proficiency and accomplish the expected output.
Politeness Strategies Analysis in "Two Distant Strangers"
Authors: Damara Gabriella Sella , Romala Almira Ghassani Shabrina
Published: November 2022

The effort to satisfy someone else’s face wants is referred to as a politeness strategy in linguistics. These strategies are used in everyday communication. Aside from using politeness strategies in daily life dialogues, politeness strategies can also be seen in films. The object of this study is the script of a short film on Netflix entitled Two Distant Strangers. There are three key characters which are Carter, Merk, and Perri.  This research aims to discover the types of politeness strategies utilized by the characters in Two Distant Strangers and the sociological factors that influence the usage of politeness strategies in the short film. This research employs the pragmatic approach and qualitative methodology. From the analysis, the researchers found that all characters in Two Distant Strangers implemented four types of politeness strategies. The researchers also discovered that the characters’ utterances demonstrated a relationship between politeness strategies and related sociological factors. Bald on-record is the most frequently used strategy because Merk, the character who acts as a police officer, believes he is more powerful than the other characters. The sociological factor of high to low power plays a part in why Merk is not hesitant to ignore other characters’ faces and command them as he likes.
Revisiting Motivational Construct and Learning Preferences in Immersion Context: Does Culture Matter?
Authors: Dzulfikri Dzulfikri
Published: November 2022

Abstract

This study is devoted to investigating dynamic motivational construct about learning structures in an immersion context. Because of ever-changing motivational construct in particular driven by learning structures in a new environment, this study assumes that the preferred learning structure which is commonly in favor in their home countries might shift which eventually affects their learning motivation. This study takes place at the language training center of the University of Hawaii at Manoa, USA, and employs a survey.  The research participants are mostly graduate students taking English courses to bridge their language skill.  After doing correlation, the researcher has found several surprising findings. The first finding is that although cooperative learning has the highest contribution to intrinsic motivation, they don’t show any significant correlation (r=.279). On the other hand, competitive learning negatively correlates to intrinsic motivation (r=.-407), suggesting that if competitive learning is enacted, students’ intrinsic motivation even decreases. In terms of learning preference, individualistic learning is favored most which might be affected by learning cultures commonly adopted in graduate programs in the US.

Keywords: Self-Determination Theory, learning types, extrinsic and intrinsic motivations.
Microhardness and flexural strength of two 3D-printed denture base resins
Authors:   Universidade de Lisboa, Faculdade de Medicina Dentária, Unidade de Investigação e Ciências Orais e Biomédicas (UICOB), Lisbon, Portugal, Neves Cristina , Chasqueira Ana ,   Universidade de Lisboa, Faculdade de Medicina Dentária, Unidade de Investigação e Ciências Orais e Biomédicas (UICOB), Lisbon, Portugal, Rebelo Patrícia ,   Universidade de Lisboa, Faculdade de Medicina Dentária, Lisbon, Portugal, Fonseca Mariana ,   Universidade de Lisboa, Faculdade de Medicina Dentária, Lisbon, Portugal, Portugal Jaime ,   Universidade de Lisboa, Faculdade de Medicina Dentária, Unidade de Investigação e Ciências Orais e Biomédicas (UICOB), Lisbon, Portugal, Bettencourt Ana ,   Universidade de Lisboa, Faculty of Pharmacy, Research Institute for Medicines (iMed.ULisboa), Lisbon, Portugal
Published: November 2022

Objectives: To evaluate the microhardness and flexural strength of printed and conventionally produced denture base acrylic resins. Methods: A total of 32 parallelepiped specimens (64×10×3.3 mm) were manufactured using two light-cured resins suitable for 3D printing (V-Print Dentbase and Denture 3D+) and two heat-cured resins for conventional production (Probase Hot and Villacryl Rapid) (n=8). After 24-h storage in water, Knoop microhardness (98.12 mN load for 30 s) and three-point flexural strength (1 kN load cell, at a crosshead speed of 5 mm/min and 50 mm between rods) were determined. Microhardness data were analyzed with one-way ANOVA followed by Tukey post-hoc tests. Flexural strength data were submitted to the Kruskal-Wallis test. A significance level of 5% was considered (α=0.05). Results: The resins showed statistically significant (p<0.001) differences regarding microhardness (V-Print Dentbase < Denture 3D+ < Probase Hot < Villacryl Rapid). No statistically significant (p=0.527) differences were found in flexural strength between the four resins. Conclusions: The printed resins had lower microhardness values than conventional resins, but all resins showed similar flexural strength.
Efficacy of endovascular superselective chemoembolization with HepaSphere 50–100 μm microspheres saturated with cytostatic in stopping nosebleeds in patients with nasopharyngeal cancer
Authors: Voronov V. G. , Rajabov S. D. , Ivanov A. A. , Rasulov Z. M.
Published: November 2022

The OBJECTIVE was to show the effectiveness of a new method for stopping nosebleeds in patients with nasopharyngeal cancer using endovascular superselective chemoembolization of the tumor arterial bed with HepaSphere 50–100 μm microspheres saturated with the cytostatic doxorubicin.METHODS AND MATERIALS. The results of treatment of 94 patients who against the background of progressive growth of nasopharyngeal cancer and ongoing combined treatment in oncology centers experienced nosebleeds are presented. In all these patients, according to the results of examinations in cancer centers, no convincing source of nosebleeds was identified. In the conditions of Polenov Neurosurgical Institute, 94 patients underwent endovascular superselective chemoembolization of the vasculature of nasopharyngeal cancer. The embolizate was a mixture of HepaSphere 50–100 μm microspheres saturated with the cytostatic doxorubicin (50 mg). All patients were included in the study in the absence of contraindications and after signing a voluntary informed consent approved by the ethics committee. The selection of patients was carried out according to the following criteria: thorough morphological verification of the neoplasm; locally advanced process of III and IV stages (T2-4 N0-2M0); no history of other cancers; absence of individual hematogenous metastases; absence of competitive pathology in the stage of decompensation; age was over 18 years old. All patients underwent induction-simultaneous chemoradiotherapy (CRT) with the use of radiation therapy in the usual dose fractionation regimen.RESULTS. The hemostatic effect was achieved in all 94 patients due to sequential superselective chemoembolization of the vasculature of the tumor itself with embolizate, which was a mixture of HepaSphere 50–100 μm microspheres saturated with the cytostatic doxorubicin (50mg). In the future, nosebleeds in these patients did not occur. The main sources of nosebleeds were the following branches of the external carotid artery: in 46.2 % of cases – the maxillary artery, in 37.6 % – the ascending pharyngeal artery, in 8.6 % – the occipital artery, in 5.4 % – the artery of the carotid node, in 2.2 % – other branches of the external and internal carotid arteries on one side or on both sides.CONCLUSION. The method of endovascular superselective chemoembolization with doxorubicin of the vasculature of nasopharyngeal cancer complicated by nosebleeds developed and introduced into medical practice was the initial stage of the combined treatment of these neoplasms. A good hemostatic effect was achieved in all 94 patients.
The use of diaphragmatic flap for the main bronchus stump reinforcement in right-sided pneumonectomy performed for destructive pulmonary tuberculosis with drug resistance of Mycobacterium tuberculosis
Authors: Avetisyan A. O. , Serezvin I. S. , Kudriashov G. G. , Chausov A. V. , Davydenkova E. A. , Sokolova O. P. , Li V. F. , Stashkova K. A. , Yablonskii P. K.
Published: November 2022

INTRODUCTION. Drug-resistant tuberculosis with subtotal and total lesion of one of the lungs is the most common indication for pneumonectomy. This operation is accompanied by a high risk of postoperative complications, among which the most dangerous is pleural empyema with bronchopleural fistula. In this regard, the prevention of this complication is an extremely important task.TheOBJECTIVEwas to study the results of using a diaphragmatic flap to prevent the development of right main bronchus stump insufficiency with bronchopleural fistula in patients with destructive pulmonary tuberculosis. METHODS AND MATERIALS. A retrospective study was carried out for the period from 2015 to 2019. The study included 13 patients who underwent right-sided pneumonectomy with diaphragmoplasty of the right main bronchus stump. Indications for diaphragmoplasty were: persistent bacterial excretion at the time of surgery, pre-existing bronchopleural fistula, intraoperative pleural contamination, progressive course of a specific process.RESULTS. The postoperative period was smooth in 10 (77 %) patients. Postoperative complications developed in 3 (23 %) patients: in 1 (7.7 %) case, there was right main bronchus stump insufficiency with bronchopleural fistula and in 2 (15.3 %) cases, there were right main bronchus stump insufficiency without bronchopleural fistula. A satisfactory immediate result was achieved in 12 (92.3 %) patients.CONCLUSION. The diaphragmatic flap is a reliable material for plasty of the right main bronchus stump in order to prevent the formation of bronchopleural fistula in destructive pulmonary tuberculosis.
Diagnostic and treatment of fibrinothorax
Authors: Lishenko V. V. , Zaytsev D. A. , Kochetkov A. V. , Kurygin A. A.
Published: November 2022

The OBJECTIVE was to promote the official introduction into clinical practice of the term «fibrinothorax» as a separate nosological unit and a special form of exudative pleurisy. This term reflects the essence and timing of the pathological process in the pleural cavity and defines a specific set of necessary therapeutic and diagnostic measures.METHODS AND MATHERIALS. 67 patients with fibrinothorax of different volumes were examined and treated. Two methods of pleural cavity sanitation were used: operative (thoracoscopic) and «closed» with the use of proteolytic enzymes.RESULTS. Among 67 patients, the leading cause of fibrinothorax was nonspecific (para- and metapneumonic) pleurisy – 48 (72 %) patients. In 7 (10 %) cases, fibrinothorax was established, which complicated the course of pleurisy of tuberculous etiology. In 6 (9 %) cases, pleural effusion was a transudate, in which, against the background of repeated punctures and long periods of fluid accumulation in the pleural cavity, partial delineations in the form of fibrinothorax formed. Carcinomatous pleurisy was diagnosed in 6 (9 %) patients of the study group. Pleural cavity sanitation through the use of proteolytic enzymes was performed in 49 (73 %) of 67 patients. Thoracoscopic sanitation with biopsy for fibrinothorax was performed in 18 (27 %) patients. This material formed the basis of the concept of diagnosis of fibrinothorax and optimization of treatment.CONCLUSION. The introduction of the term «fibrinothorax» into clinical practice, reflecting the essence of this pathological condition, contributes to the formation of a treatment and diagnostic algorithm aimed at the sanitation of the pleural cavity in optimal ways.
Economic risk modeling and spectral evaluation
Authors: MATVEEV Boris A.
Published: November 2022

Subject. The article is devoted to economic risk assessment.
Objectives. The aim is to increase reliability and accuracy of economic risk quantification.
Methods. I developed an economic and mathematical model of economic risk. To examine it, I used the apparatus of the spectral theory of random processes.
Results. The spectral analysis enabled to replace the examination of the statistical model of economic risk by the study of its image with Fourier integral transform. As a result, I obtained a spectral risk indicator without disadvantages inherent in most traditional risk measures. The spectral approach helped measure risk in real time, which is necessary when organizing the risk management process. Verification of the spectral approach to risk assessment is considered on the case of innovative project.
Conclusions. The study offers a solution to existing problems related to economic risk quantification, and presents a developed economic and mathematical model of economic risk. It proposes a spectral risk measure that takes into account the nature of the behavior of an economic variable, its possible deviation from expected value, and the uncertainty associated with the deviation. The paper also presents a unique computational program to calculate risk. The spectral risk analysis is of theoretical and practical value, as it enables to expand knowledge about risk, provides a theoretical underpinning of risk assessment, helps identify and eliminate the shortcomings inherent in known statistical measures.