bluuebunny/crossref_metadata_2025 huggingface dataset:
Surgical treatment of hallux valgus using a modified Reverdin-Isham technique
Authors: Lara Luiz , Torres Filho Lúcio , Cervone Gabriel , Grajales Juan , Bordignon Glaucia , Lancia Lara Furtado , Santos Diego
Published: April 2021

Objective: To evaluate the postoperative results of patients who underwent surgical treatment of hallux valgus with a modified Reverdin-Isham (RI) technique and to compare the achieved correction with that reported by studies using the original technique. Methods: This is a retrospective study with patients with mild to moderate hallux valgus who underwent surgery from June 2010 to July 2019. All patients were operated using the modified RI technique. Data were collected through the American Orthopaedic Foot and Ankle Society (AOFAS) questionnaire, in addition to pre and postoperative radiographic studies of the intermetatarsal angle (IMA), the hallux valgus angle (HVA), and the distal metatarsal articular angle (DMAA). Results: The mean postoperative follow-up was 30.1 months, and the mean age of patients was 56.4 years. The median AOFAS score in the postoperative period was increased by 56 points. The mean HVA was reduced in 16.5°, the mean IMA was reduced in 4.3°, and the mean DMAA was reduced in 10°. There were no cases of displacement or deviation of the first metatarsal head during the postoperative follow-up. Conclusion: The modified RI technique provided considerable stability to the osteotomy, in addition to a significant correction of the measured angles and an improvement in AOFAS scores, demonstrating itself as an effective technique for correcting mild to moderate hallux valgus. Level of Evidence IV, Therapeutic Studies, Case Series.
Влияние зонгорина на активность АТФ-зависимых K+-каналов и состояние мегапоры митохондрий печени крыс
Authors: Муратова Дилноза Хасановна , Эргашев Н. А. , Шкинев А. В. , Асраров М. И. , Курбанов У. Х.
Published: April 2021

Показано, что дитерпеноидный алкалоид зонгорин в микромолярных концентрациях, подобно диазоксиду и 1-О-бензоилнапеллину, активирует АТФ-зависимые K+-каналы (IC50 = 1,0 мкМ), а также дозозависимо ингибирует открывание Ca2+-зависимой мегапоры изолированных митохондрий печени крыс (IC50 = 35,2 ± 3,1 мкМ).
О возможности применения витаминов при резистентной депрессии
Authors: Арсланова П. Р. , Жиганова Т. А. , Сергеева Т. А.
Published: April 2021

Приведены данные о роли гомоцистеина и дефицита витаминов группы B в развитии проявлений депрессии, об особенностях синтеза нейромедиаторов у пациентов с генетическими полиморфизмами ферментов фолатного цикла и цикла метилирования. Проанализирован обмен нейромедиаторов с акцентом на участие в нем витаминов группы B и аскорбиновой кислоты. Представлены экспериментальные и клинические данные об эффективности их применения у пациентов с резистентной депрессией. Рассмотрена возможность назначения поливитаминных комплексов, инозина и янтарной кислоты при резистентной депрессии.
Пероральные лекарственные формы с модифицированным высвобождением фармакологических веществ
Authors: Щулькин Алексей В. , Якушева Е. Н.
Published: April 2021

Представлена современная классификация таблетированных лекарственных форм с модифицированным высвобождением фармакологических веществ, освещены их основные преимущества перед лекарственными формами с немедленным высвобождением фармакологических веществ, изложены новые требования их регистрации в рамках ЕврАзЭС. На конкретных примерах лекарственных средств (метопролол, триметазидин, мебеверин и этилметилгидроксипиридина сукцинат) оценена их фармакокинетика и терапевтическая эффективность в лекарственных формах с модифицированным и немедленным высвобождением. Сделан вывод о том, что для лекарственной формы с модифицированным высвобождением этилметилгидроксипиридина сукцината недостаточно информации для оценки его фармакологической и терапевтической эквивалентности лекарственной форме с немедленным высвобождением этого лекарственного средства.
Đánh giá các yếu tố lựa chọn ngân hàng thương mại tại TPHCM cho người cao tuổi
Authors: Giao Ha Nam Khanh , Dat Ha Minh
Published: April 2021

Nghiên cứu nhằm nhận dạng các yếu tố khách hàng cao tuổi quan tâm khi lựa chọn ngân hàng và tìm hiểu những khác biệt trong sự quan tâm đến các yếu tố giữa các nhóm khách hàng khác nhau. Mô hình nghiên cứu được phát triển dựa trên cơ sở lí thuyết về ngân hàng, khách hàng cao tuổi, hành vi người tiêu dùng và các nghiên cứu đi trước về lựachọn ngân hàng. Đánh giá độ tin cậy thang đo qua hệ số Cronbach’s Alpha và phân tích nhân tố khám phá EFA được thực hiện. Kiểm định Friedman cho thấy khách hàng cao tuổi quan tâm khác nhau đến các nhân tố, được xếp từcao đến thấp gồm: (1) Chất lượng nhân viên; (2) Giá; (3) Uy tín; (4) Kinh nghiệm; (5) Cơ sở vật chất; (6) Ưu đãi; và (7) Sự tham khảo. Phân tích biệt số làm rõ thêm sự khác biệt về mức độ quan tâm đến các yếu tố lựa chọn ngân hàng của các nhóm khách hàng khác nhau phân theo nhóm tuổi, giới tính, tình trạng làm việc, dịch vụ sử dụng và thu nhập
Pentingnya Dalam Mengapresiasi Sebuah Karya Cipta Dengan Meminilimasir Plagiarisme di Bidang Akademik
Authors: khek jessica
Published: April 2021

Plagiarism is a challenge that every legal subject must take in a particular act. And copyright is one of the intellectual property rights (intellectual property rights) that are automatically protected by the state. In Copyright can also apply an act of plagiarism. Plagiarism is regulated authentically according to the Regulation of the Minister of National Education of the Republic of Indonesia No. 17 of 2010 concerning the Prevention and Eradication of Plagiarism in Higher Education, plagiarism is an act of intentionally or unintentionally in obtaining or trying to obtain credit or value for a scientific work, by quoting part or all of the work and / or scientific work of other parties that are recognized as scientific work. without an appropriate and adequate source. Meanwhile, plagiarists are individuals or groups of plagiarists, each acting for himself, for groups or for and on behalf of a body.
System-directed pairing of protein amino acids. Part I
Authors: Rakočević Miloje M.
Published: April 2021

The idea of this review paper is as follows. If it can be shown (and it can!) that the pairing of protein amino acids is system-directed (determined), then the hypothesis of a prebiotically determined genetic code (Rakočević, 2004a) gets its full meaning. The hypothesis is supported by the fact that all these pairings come to the fore primarily through classes and subclasses of amino acid molecules. What is, however, unexpected and even unbelievable from the point of view of current science is the fact that the quantities, i.e. number of atoms (in a direct or indirect relation to the number of nucleons), in these classes and subclasses, are determined by Gauss’ number 51 (51 = 3 x 17), or Gauss’ sequence: 51 ± 10, 51 ± 20, 51 ± 30, 51 ± 40 and 51 ± 50; also by Dürer’s number 34 (34 = 2 x 17), even more either by its double value, 68; or by Dürer’s sequences: 34 ± 10, 34 ± 5 and 68 ± 10, 68 ± 5. Since the hypothesis refers to constituents – amino acids and nucleotides – it follows that in terms of the type and number of constituents, it makes no sense to talk about evolution of GC, but only about its generating. [Generated, not degenerated code!] It makes sense to talk about the evolution of the genetic code only from the "moment" when the resulting peptide and nucleotide chains enter into chemical reactions and interactions; although even then it can be said that this is just a second phase of GC generation.
Text-driven jurisdiction in cyberspace
Authors: Hildebrandt Mireille
Published: April 2021

In this paper I further develop a philosophy of technology for law and the rule of law, more specifically for the role of territorial jurisdiction in the protection against crime and against arbitrary use of the ius puniendi. In the face of the code- and data-driven nature of cyberspace I will discuss modern positive law as based on a text-driven jurisdiction and the main argument of the paper is that we cannot take for granted that the kind of legal protection that is offered by a text-driven criminal jurisdiction will hold in the context of cyberspatial challenges. In the first section, I investigate how modern positive law-as-we-know-it was triggered by the technologies of cartography and the printing press, arguing that both modern democracy and the rule of law are affordances of these technologies, as they enabled the rise of an exclusive, monopolistic territorial jurisdiction. In the second section, I explore the scope of written legal speech acts, integrating speech act theory and philosophy of technology, explaining how the substantive and procedural principles of criminal law legality depend on the performative effect of written legal speech acts, highlighting their connection with the rise of territorial jurisdiction and the creation of an artificial, modern demos. In the third section, I discuss the new challenges of competing territorial jurisdictions that claim legal powers outside their territory, coupled by the challenges posed by new types of ‘brute jurisdictions’ that are based on the force of technological infrastructures that may overrule the performative effect of written legal speech acts. In the conclusions I call for keen attention to which affordances of cartography and the printing press we need to preserve in cyberspace to uphold criminal law principles such as the presumption of innocence, the right to a fair trial and the legality principle, taking note that preservation will require reinvention and imagination rather than taking for granted the mode of existence of text-driven jurisdiction.
Flexible Estimation of Policy Preferences for Witnesses in Committee Hearings
Authors: Esterling Kevin , Park Ju Yeon
Published: April 2021

Theoretical expectations regarding communication patterns between legislators and outside agents, such as lobbyists, agency officials or policy experts, often depend on the relationship between legislators' and agents' preferences. However, legislators and non-elected outside agents evaluate the merits of policies using distinct criteria and considerations. We develop a measurement method that flexibly estimates the policy preferences for a class of outside agents -- witnesses in committee hearings -- separate from that of legislators’ and compute their preference distance across the two dimensions. In our application to Medicare hearings, we find that legislators in the U.S. Congress heavily condition their questioning of witnesses on preference distance, showing that legislators tend to seek policy information from like-minded experts in committee hearings. We do not find this result using a conventional measurement placing both actors on one dimension. The contrast in results lends support for the construct validity of our proposed preference measures.
Differential expression of neuroligin 1 in cancers of the breast.
Authors: Mamoor Shahan
Published: April 2021

Breast cancer affects women at relatively high frequency (1). We mined published microarray datasets (2, 3) to determine in an unbiased fashion and at the systems level genes most differentially expressed in the primary tumors of patients with breast cancer. We report here significant differential expression of the gene encoding neuroligin 1, NLGN1, when comparing primary tumors of the breast to the tissue of origin, the normal breast. NLGN1 mRNA was present at significantly lower quantities in tumors of the breast as compared to normal breast tissue. Analysis of human survival data revealed that expression of NLGN1 in primary tumors of the breast was correlated with recurrence-free survival in patients with luminal A subtype and luminal B subtype cancer, demonstrating a complex relationship between primary tumor expression of a differentially expressed gene and patient survival outcomes influenced by molecular subtype. NLGN1 may be of relevance to initiation, maintenance or progression of cancers of the female breast.
Resensi buku Teol. PB
Authors: Salombe Yafet Sapan
Published: April 2021

Pengantar kedalam teologi berdasarkan injil
Educator Intervention Concerning Sexual and Gender Minority Youth in the Czech Republic
Authors: Simons Jack , Kudrnáč Ales , Kepic Marcela , Smetáčková Irena , Hall Timothy McCajor
Published: April 2021

A national sample of 114 educators working in secondary schools in the Czech Republic participated in a mixed research online survey study. The study was conducted to assess educators’ responses to situations concerning actual and perceived sexual and gender minority (SGM) youth. Both quantitative and qualitative data were collected. Educators’ responses included intervening when witnessing homo/trans-negativity as well as facilitating discussions with students in the classroom when these incidences occurred. Regression models indicated that these SGM advocacy responses (intervention and discussion) were significantly related to educators’ levels of self-efficacy. Having classroom discussions with students about incidences of SGM bullying were also found to relate to having training regarding SGM topics and feeling negative about students using homo/trans-negative slurs. Our findings suggest that training on SGM topics should be offered to educators in the Czech Republic to increase the likelihood that they follow up homo-/trans-negative language and behavior with discussions. Training regarding the latter should include reflection over the impact of one’s attitudes on their SGM advocacy behaviors. Lastly, future studies should include other educators besides teachers such as school counselors and school psychologists who are also uniquely positioned to advocate for SGM youth in Czech schools.
On the Relationship between ANOVA Main Effects and Average Treatment Effects
Authors: Graefe Linda , Hahn Sonja , Mayer Axel
Published: April 2021

We adopt a causal inference perspective to shed light into which ANOVA type of sums of squares (SS) should be used for testing main effects and whether main effects should be considered at all in the presence of interactions. We consider balanced, proportional and nonorthogonal designs, and models with and without interactions. When the design is balanced, we show that the average treatment effect is estimated by the main effects obtained by type I, II, and III sums of squares. In proportional designs, we show that the average treatment effect is estimated by the the type I and type II main effects, whereas type III SS yield biased estimates of the average treatment effect if there are interactions. When the design is nonorthogonal, ANOVA type I is always highly biased and ANOVA type II and III main effects are biased if there are interactions. We include a simulation study to illustrate the magnitude of the bias in estimating the average treatment effect across a variety of conditions, and provide recommendations for applied researchers.
Structural Invariance of Declarative Knowledge Across the Adult Lifespan
Authors: Watrin Luc , Schroeders Ulrich , Wilhelm Oliver
Published: April 2021

The differentiation-dedifferentiation hypothesis of general cognitive ability has been widely studied, but comparable research on crystallized intelligence is scarce. To close this gap, we conducted an empirical test of the age differentiation hypothesis of declarative knowledge as proposed in Cattell's investment theory, which predicts that knowledge differentiates into diverse forms after compulsory education ends. Thereto, a cross-sectional sample of 1,629 participants aged 18 to 70 years (M = 45.3) completed a comprehensive knowledge test comprising 120 broadly sampled questions from 12 knowledge domains, as well as a measure of openness. To investigate age-related differences in the level and structure of knowledge, we performed invariance tests in local structural equation models. The results did not provide any evidence for age-related differentiation of declarative knowledge but indicated age-related differences in the mean structure. Higher levels in openness were associated with higher levels in knowledge but not with more differentiated structure of knowledge. Contrary to predictions of the investment theory, our results suggest that declarative knowledge is a highly stable construct across major parts of the adult lifespan.
Human olfaction: A view from the top
Authors: Pierzchajlo Stephen , Olofsson Jonas
Published: April 2021

Although our understanding of human olfactory perception has increased dramatically, it remains less well understood how olfaction interacts with cognitive processes. In this overview, we review the claim that olfaction evolved to predominantly embody “novelty detection”, a framework that leaves little room for cognitive representations and processes. We challenge this framework by pointing to several perceived limitations. Instead, we argue that human olfaction is best understood in terms of its reliance on top-down processes; visual or verbal contexts may generate predictions of odor qualities, and a fundamental role of olfaction is to evaluate such predictions. We hypothesize that olfaction is to a large extent dependent on “top-down” cognitive processes. We discuss how this framework differs from other contemporary approaches to human olfactory perception. We conclude that in contrast to other frameworks that characterize olfaction primarily in terms of stimulus-driven perception, human olfactory processing is best understood by invoking a “view from the top”.
Health Seeking Processes of Leprosy Patients in a Hill District of Nepal
Authors: Engelbrektsson Ulla-Britt , Subedi Madhusudan
Published: April 2021

To shorten delays in leprosy diagnosis, health-seeking processes have to be understood and documented. In 2015, the International Nepal Fellowship launched a three-year research project on the subject. One part of the project was a community study in which recent health-seeking efforts were to be studied in the light of earlier ones. The focus of this article is upon insights gained in field research in a village and its immediate surroundings in the district of Jajarkot, western Nepal. The research highlights the importance of a longitudinal, patient-focused study that covers the period from just before the start of leprosy services until late 2018. The research methods include participant observations, narratives, in-depth interviews, and documentary and statistical enquiries. The research shows that the introduction of the Multi Drug Therapy (MDT) in the early 1980s has drastically changed the local leprosy situation. The number of new cases has declined, there are far less impairments and disabilities, and those recognized as affected are no longer excommunicated. However, the delays before diagnosis tend to be long. A lack of leprosy diagnosing skills within the health services sector is one reason. The residents not recognizing early signs and symptoms is another. An expectation of leprosy endemic in certain kinship groups, and not in others, is yet another. And, for some, so is the fear of social stigma. Moreover, there is the delaying factor of more than one set of beliefs and practices in relation to leprosy:a traditional, mainly magic-religious outlook and approach which co-exists with allopathic (biomedical) views and methods.
Indigenous Knowledge in Mundum and Suptulung
Authors: Rai Shanti Devi
Published: April 2021

The dominance of formal education over the indigenous education along with the language and culture has been a pressing issue in almost all cultures of the world.  The Nepalese education system is also largely influenced by the western education system. So, it is inevitable that Nepalese students too are influenced by the western education. Rai community is one of 125 indigenous groups having rich indigenous knowledge. Particularly, they have vocational education of the food security that transforms the knowledge through the cultural practices, which is close to nature and thus a unique one. The significance of the food security means survival for the whole year. Mundumic education focuses on the survival in nature and to reduction of   poverty.  However, such indigenous type of cultural activities as part of education have not been recognized and put into priority in the government’s curriculum. This is an example of a missing link of such cultural heritage in our curriculum. Therefore, I propose here to explain a typical Binayo Movie thematically having indignity in its content suitable for inclusion in national curriculum. This Movie is a key to establish the Mundum and Suptulung identity within this community contributing to indigenous identity for the future generations. Thus, this article explores some significant aspects of Mundumic cultural education which helps conserve indigenous knowledge on the one hand, and on the other, reduce poverty through indigenous skills of food production and security.
माध्यमिक तहका कथाहरूमा कोशीय संसक्ति Madhyamik Tahaka Kathaharuma Koshiya Samshakti
Authors: भुसाल Bhusal केशव Keshab
Published: April 2021

प्रस्तुत लेख आख्यानात्मक विधाअन्तर्गत पर्ने कथा विधामा प्रयुक्त कोशीय संसक्तिको अध्ययन विश्लेषणमा आधारित रहेको छ । वस्तुतः यसअन्तर्गत माध्यमिक तह (कक्षा नौ र दश) मा समाविष्टकथाहरूमा प्रयुक्त कोशीय संसक्ति र यसअन्तर्गतका विविध भेदहरूकोे सूक्ष्म समीक्षण गरिएकोछ । यस अध्ययनमा मूलतः भाषावैज्ञानिक ह्यालिडे र हड्सनद्वारा प्रस्तुत संसक्तिसम्बन्धी सैद्धान्तिकअवधारणालाई अध्ययनको आधारका रूपमा लिइएको छ । यस क्रममा पुनरुक्ति र सन्निधानजस्ताकोशीय संसक्तिको अध्ययन गरिएको छ, जसमध्ये पुनरुक्तिअन्तर्गत  पुनरावृत्ति, पर्यायवाची, विपरीतार्थी,समावेशी–समावेश्य र अङ्गी–अङ्गको पहिचान र विश्लेषण गरिएको छ भने सन्निधानअन्तर्गत भाषिकशब्दहरूका बिच सान्निध्य सम्बन्ध स्थापित गर्ने कोशीय सिक्रीहरूको सूक्ष्म अन्वेषण गरिएको छ ।यस क्रममा माध्यमिक तहका कथा विधामा प्रयुक्त कोशीय संसक्तिको स्थिति, विशेषता र पाठरचनामातिनले खेलेको भूमिका अध्ययनलाई विशेष जोड दिइएको छ । प्रस्तुत अध्ययनमा मिश्रित अनुसन्धानविधि (परिमाणात्मक र गुणात्मक) को अवलम्बन गरिएको छ । यस अध्ययनबाट आख्यानात्मक सङ्कथन वा रचनामा प्रयोग हुने कोशीय संसक्ति र तिनको भूमिकाबारे जानकारी प्राप्त गर्न मद्दत पुग्नेअपेक्षा गरिएको छ ।
An Enhanced Low Voltage Ride-Through Control Scheme of a DIFG based WTG Using Crowbar and Braking Chopper
Authors: Jayasawal Kishan , Thapa Khagendra
Published: April 2021

The grid codes define low voltage ride-through (LVRT) as capability of wind turbine generator (WTG) to support the grid voltage by injecting reactive power and suppress the rise of DC-link voltage and inrush rotor current in the rotor side converter (RSC) of the doubly fed induction generator (DFIG) during a fault. Moreover, the rotor current increases significantly during severe disturbances if any protection schemes are not employed. Therefore, the protection schemes must be used to avoid the damage to the converter during a fault. This paper proposes an enhanced LVRT control scheme of a DFIG employing a crowbar in the RSC side and braking chopper across the DC-link capacitor. The DFIG is highly delicate to grid voltage fluctuation during a fault because the DFIG is directly linked to the grid via stator. During severe fault the crowbar regulates the rotor current within an acceptable range and the braking chopper discharges the DC-link capacitor via resistor within a safe limit. The proposed LVRT control scheme is performed for a 2.4-MW DFIG using a MATLAB/SIMULINK simulator. The results delineate that the proposed control scheme is able to rapidly decrease the rotor current and repress the escalation in DC-link voltage during a grid fault.
Risk Rating for Risk-Based Maintenance: A Case Study of Small Hydropower Plant in Nepal
Authors: Sharma Rajan , Bhattarai Nawraj , Neupane Sanjaya
Published: April 2021

Fourth generation maintenance philosophy and Quality management system 9001:2015, emphasis on the concept of risk based thinking. And it is one of the challenging part of maintenance department to adopt these philosophy by quantifying all the activities of the department. Risk rating based on reliability is one of the techniques to quantify the maintenance activities for those organizations, whose reliability of goods and services matter in the market. Hydropower sector is also among them whose reliability matters highly in consumer life standard. So this paper approaches to rate the risk of hydropower based on the reliability of components for the implementation of Risk-based maintenance. From the study of data recorded in log book of a small hydropower plant located in western part of Nepal, it was found that the overall reliability score of the plant was 0.9819, which was low as compared to other hydropower of Nepal, where turbine section of both the units of the plant found a higher risk score than other systems. Study adopted two tools i.e. Analytical Hierarchical based Fault Tree Analysis and Critical Analysis Technique to find the critical assets and Failure Mode and Effect Analysis for the rest of all to quantifying the risk in component level. The analysis shows that the cooling system as the critical asset for both the units and it contributes 72% and 64% in the reliability of the turbine section. The critical assets thus obtained was validated through the critical analysis technique. From which the risk score of cooling system found 90% in both the units. To analyze the risk in component level, Failure Mode and Effect Analysis of different sub component of critical assets was done. Among the sub-components of the cooling system, radial tube filter gets the highest risk score. Its components; cartridge, tube, and joints have the risk score of 450, 192, and 96 respectively. And from the critical analysis of the rest of the subsystems of uint-I and unit-II, components such as bearings, breaker of the transmission system, transmission equipment, excitation system and transformer of unit-I and breaker of the transmission system, transmission equipment and excitation system of unit-II are found to have higher critical score, hence, it is recommended to apply preventive activities on these components as per the manufacturer to reduce the risk that could be caused by their failure.
Voltage Control and Braking System of a DFIG during a Fault
Authors: Mahat Rabin , Thapa Khagendra B. , Lamichhane Sudip , Thapaliya Sudip , Dhakal Sagar
Published: April 2021

This paper describes a voltage control scheme of a doubly fed induction generator (DFIG) wind turbine that can inject more reactive power to the grid during a fault so as to support the grid voltage. To achieve this, the coordinated control scheme using both rotor side converter (RSC) and grid side converters (GSC) controllers of the DFIG are employed simultaneously. The RSC and GSC controllers employ PI controller to operate smoothly. In the voltage control mode, the RSC and GSC are operated. During a fault, both RSC and GSC are used simultaneously to supply the reactive power into the grid (main line) depending on voltage dip condition to support the grid voltage. The proposed system is implemented for single DFIG wind turbine using MATLAB simulation software. The results illustrate that the control strategy injects the reactive power to support the voltage stability during a fault rapidly. Also, the braking system is designed to protect the wind turbine system from over speed. For this purpose, the braking resistors are being used.
Mechanical and Thermal Characterisation of Millscale Modified Al-Cu Alloy for Artificial Intelligence Systems
Authors: Sekunowo Olatunde Israel , Kuforiji Catherine U. , Ajibodu Emmanuel Oluwaseun
Published: April 2021

Continuous research into critical functional property enhancement of materials employed in artificial intelligence systems is imperative to overcome performance limitations. This study investigated the thermal and mechanical properties of stir-cast fabricated Al-Cu alloy modified with addition of iron-millscale (IMS) particles varied from 2-6 wt.%. The alloys microstructure was analysed using both optical and scanning electron microscope coupled with energy dispersive spectroscopy (SEM/EDS). PerkinElmer Thermogravimetry/Derivative thermal analyser was used to assess the alloys thermal characteristics while the mechanical properties were evaluated using relevant state of the art equipment. Results show that the best thermal and mechanical properties comparable to established standards were achieved at 6 wt.% IMS particle addition. Contributions to the alloy enhanced performances stemmed from the structure refining propensity of IMS particles. Based on the thermal and mechanical properties demonstrated, the alloy is recommended for application in pneumatic offshore valve actuator used in oil and gas flow process lines.
MODELING THE MELTING OF SCRAP METAL OF DIFFERENT DENSITY IN A BOF SMELTING
Authors: Sigarev E. , Lobanov Y. , Semiryagin S. , Pohvalitiy A.
Published: April 2021

The results of mathematical modeling process of melting scrap metal in the bath of an oxygen converter are presented. The influence relative amount of scrap metal in the charge of oxygen-converter smelting and its density on dynamics bath temperature during melting, slag oxidation and liquid metal yield was studied. It is shown that due to change in the shape of scrap metal during its melting, the classical approach to determining the reactive surface area of ​​the latter needs to be clarified.Mathematical descriptions of scrap metal melting in converter smelting by linear dependence and using fourth degree polynomials, which take into account the influence of initial and current carbon concentration in the bath, are offered. The influence of density and fraction of scrap metal, which is a part of metal charge, on duration of its melting in bath of oxygen converter, content iron oxides in slag, temperature mode process and yield liquid metal is investigated. It is shown that increasing mass of scrap metal in the metal charge to 40%, in the absence of its preheating, significantly changes the appearance both the oxidation curves of carbon and the dynamics of the bath temperature in the initial period melting.The latter may be due to the preservation active surface area of ​​scrap metal as its mass changes. Additional heat consumption for melting an increased amount preheated («cold») scrap metal leads to a decrease in the temperature of the liquid bath, which confirms the feasibility using the technology melting with preheating an increased amount of scrap.It is shown that from the point of view ensuring the rational course of converter smelting it is expedient to use equal shares heavy and lightweight scrap metal, regardless of the share latter in the metal charge. In the case using, under the considered conditions, «cold» scrap metal, the maximization yield of liquid metal is provided at the amount scrap up to 22% of the total mass metal charge.
OPTIMIZATION OF THE PROCESS OF HEAT TREATMENT OF POROUS THERMAL INSULATING MATERIAL IN A VORTEX APPARATUS BY MECHANICAL PROPERTIES
Authors: Sokolovska I. , Chumak K.
Published: April 2021

The paper provides experimental data, on the basis of which the influence of various factors on the strength characteristics of porous heat-insulating materials was studied. A mathematical model of the process of heat treatment of a porous material was also proposed, with the help of which its properties can be predicted. The field of application of heat-insulating materials directly depends on the thermophysical and mechanical properties of the material itself, which are also interconnected. Mechanical properties determine the behavior of a material under deformation and destruction from external loads and under thermal stress. To reveal the influence of the characteristics of thermal processing modes on the mechanical properties of the processed material, a mathematical model of the process of thermal processing of a porous material was built in the given work. The elastic modulus and strength of the material were taken as process indicators characterizing the behavior of the material during deformation and destruction due to external loads, and the temperature of the thermal process, the time of thermal exposure, the moisture content of the material and the porosity of the material were taken as factors characterizing the thermal processing mode. The point forecast of indicators according to the received models for the given thermal mode of processing of porous material made: value of the modulus of elasticity is equal to 0,413, value of durability of material on compression is equal to 0,056. The work revealed that the main factor that determines the strength of the heat-insulating porous material is the duration of thermal exposure. It is obvious that it is this factor that determines the intensity of heat and mass transfer processes in the material, which is interconnected with the main technological indicator – the temperature of the external coolant. It was also noted that the thermodynamic parameters of steam are determined by the temperature and duration of thermal contact with the coolant. Thus, using the data obtained, it is possible to predict the properties of the porous material.
AUTOMATED INFORMA¬TION SYSTEM FOR GPS MONITORING DATA PROCESSING
Authors: Yalova K. , Yashyna K. , Tarasiyk O.
Published: April 2021

Using of automated information systems in the field of geolocation data processing increases the control and management efficiency of freight and passenger traffic. The article presents the results of design and software implementation of the automated information system that allows monitoring of GPS tracking data in real time, build routes and set control points for it, generate system messages about the status of vehicles on the route and generate reporting information on the base of user requests. The design of the system architecture and interface was carried out on the basis of developed object and functional data domain models, which take into account its structural and functional features. The microservice approach principles were applied during the developing of the system architecture. The system software is a set of independent services that work in their own process, implement a certain business logic algorithm and communicate with other services through the HTTP protocol. The set of the system software services consists of: a service for working with GPS data, a service for implementing geolocation data processing functions, and a web application service. The main algorithms of the developed system services and their functional features are described in the work. Article’s figures graphically describe developed system site map and system typical Web forms. This data displays the composition of web pages, paths between them and shows the user interface. The design of the user interface was carried out taking into account quality requirements of user graphical web interfaces.
IMPROVEMENT OF THE TECHNO¬LOGY FOR OBTAINING MANGANESE(IV) OXIDE FROM SECONDARY RAW MATERIALS
Authors: Yelatontsev D. , Kharitonova O.
Published: April 2021

Today's level of integrated use of minerals and beneficiation wastes in Ukraine, in particular, at the Kryvbas GOK, is unsatisfactory, as it is generally allowing the production of additional types of construction products. The volume of mining is growing, but only a small percentage of the extracted volume is transferred to the finished product. The residue in the form of waste is returned to the environment, polluting it. The reason for this is the lack of technology for integrated mineral processing and waste disposal.

The article presents the results of industrial tests of off-balance manganese ore processing technology of Ordzhonikidze GOK with a manganese content of 15–30%. It is shown that nitric acid leaching of manganese with subsequent precipitation of impurities with soda or alkali allows you to consistently purify manganese from transition and alkaline earth metals. The obtained manganese oxide has a high degree of purity, which allows obtaining pure compounds Mn (NO3)2∙6H2O, MnO2 and metallic manganese for chemical current sources. The use of columnar clarifiers with a fluidized bed with the application of pulsations allowed to eliminate time-consuming filtration processes. Concomitantly formed sodium nitrate serves as a raw material for mineral fertilizers. Experimental studies on the beneficiation of off-balance manganese ores allowed us to determine the main technological parameters of the extraction of components and to develop a technological scheme of beneficiation.

According to the proposed technological scheme, it is possible to obtain high-quality concentrates of manganese (IV) oxide. The use of optimal technological parameters of enrichment allows up to 95% of Mn to be extracted from off-balance manganese raw materials. In the long run, this will reduce dependence on imports of manganese raw materials and significantly reduce the cost of domestic manganese products.
STUDY OF PROPERTIES OF YOGHURTS MADE USING VIVO STARTER CULTURES
Authors: Gulyaev V. , Novokhatko O. , Maznytska O. , Philimonenko O.
Published: April 2021

The article presents the results of experimental studies of qualitative indicators of milk and fermented milk products (yoghurts) made using VIVO starter cultures. VIVO starter cultures contain thermophilic lactic acid bacteria Streptococcus thermophilus, Lactobacillus delbrueckii ssp., Lactobacillus acidophilus and others.

The determination of organoleptic and physico-chemical parameters of cow's milk and dairy products based on it was carried out according to generally accepted methods. During the organoleptic evaluation of milk and lactic acid products, the appearance and texture, smell, taste and color of milk were examined. Determination of active acidity was carried out in accordance with GOST 26781. Titratable acidity in degrees Turner was determined according to GOST 3624. The content of fat, protein, dry matter was determined according to GOST 2661: 2010.

A study was made of the organoleptic characteristics of yogurts obtained by fermentation by using of VIVO starter cultures. The high activity of VIVO starter cultures was established, the products on the basis of which have a pleasant taste characteristic of these products.

The results of physico-chemical analysis of yogurt samples obtained by using of VIVO starter cultures confirmed their compliance with DSTU 4343: 2004.

Lactic acid products made with VIVO sourdough are functional products. It is recommended to use yogurts based on VIVO starter cultures to restore intestinal microflora, normalize digestion, strengthen immunity, and reduce the risk of colds and SARS.
BIOSAFETY ASSESSMENT OF FLOUR AND YEASTS FOR BAKERY NEEDS ACCORDING TO MICROBIOLOGICAL INDICATORS
Authors: Коrnienko I.
Published: April 2021

The problem of non-compliance with microbiological safety indicators of finished bakery products and flour of different types is formulated. It is noted that the reason for the development of bread disease, which is caused by pathogenic and opportunistic microorganisms, is poor quality flour. The solution of the problem is offered by use of symbiosis of lactic acid bacteria as a part of leaven which possess antagonistic properties in relation to many activators.

               According to the results of microbiological research, pathogens of bread disease in wheat, spelled, oat and rye types of flour have been identified.The pathogenic micro­organisms present in the flour lead to accelerated spoilage of bread, reducing its nutritional value and safety in terms of microbiological parameters.

               It is proposed to test the effectiveness of the use of biotechnological principles, which are based on the antagonistic properties of lactic acid bacteria. To determine the biosafety of the obtained yeast, microbiological studies were performed by seeding yeast samples on elective nutrient media Saburo, Blikfeldt, GMF agar, bifido- and lactoagar.

               An improved leaven formulation for baking needs with an increased titer of lactic acid bacteria, which have powerful antagonistic powers, has been developed. Experiments have shown the effectiveness of the use of symbiosis of pure cultures of lactic acid bacteria in the composition of leavens to suppress diseases of bread, namely pathogens  – Aspergillus niger, Mycormucedoand Bacillus subtilis.

            The use of unleavened leavens with a high content of pure cultures of lactic acid bacteria in the practice of baking unleavened bread based on gluten-free types of flour contributes to the expansion of the range of functional bakery products.
ASSESSMENT OF BACTERIAL CONTAMINATION OF SURFACE WATERS OF THE RIVER DNIEPER FROM THE RECREATIONAL ZONES OF THE LEFT BANK OF ZAPORIZHZHIA
Authors: Troicka O. , Belokon K. , Manidina Y. , Ryzkov V.
Published: April 2021

The problem of environmental safety is relevant for all water recreational facilities in Ukraine. The quality of the natural environment, and, accordingly, the scale of the recreational use of water bodies largely depends on the impact on natural complexes of various unfavorable anthropogenic factors. These include, first of all, the release of untreated and insufficiently treated wastewater, pollution of water bodies by wastewater from unsettled territories of industrial and agricultural use, air pollution by pollutants, etc. These anthropogenic influences limit the recreational possibilities of aquatorial natural complexes and are dangerous for the health of vacationers.In addition to physical and chemical pollution, biological pollution of surface waters has become widespread, in particular microbial, the test indicator of which is E. coli, saprophytic bacteria and enterococci. When ingested, they can cause acute intestinal infections, fever, nausea, etc.It was determined in the work that the average annual number of saprophytic bacteria, for five years of research, varied from 25.5 to 35.5 thousand cells/cm3, which within the ecological classification corresponds to the IV class and 6 categories of water quality , according to the degree of pollution «dirty»).The results of the assessment of bacterial contamination of the surface waters of the river. The Dnieper from the recreational zones of the Left Bank of Zaporizhzhia over a five-year period indicate an unstable ecological state of the studied waters according to such bacterial indicators as the PEC index and the number of saprophytic bacteria. This makes it necessary to carry out environmental protection measures in order to increase the level of environmental safety in the zones of water recreation.
GENERAL METHODS OF OPTIMIZA¬TION OF KINEMATIC AND DYNAMIC PARAMETERS OF THE MACHINE UNIT
Authors: Romaniuk O. , Telipko L.
Published: April 2021

In steady-state operation, the kinematic and dynamic characteristics of the machine unit are periodic functions, as there is a periodic change in the forces and the transfer function of the drive mechanism. Accordingly, the task of finding methods to optimize the characteristics of the machine unit is mainly to reduce the amplitude of oscillations of the speed of the link by increasing the total moment of inertia by installing a flywheel on the shaft of the link, which increases the weight of the mechanism and its inertia.

To eliminate the corresponding shortcomings of additional flywheels, it is necessary in the process of preliminary design of the drive of the executive body of the machine unit to select such a standard gearbox, the swing torque of which would correspond to the additional flywheel, which is difficult to implement. It is more expedient to design new transmission mechanisms, the moments of inertia of rotating masses which could perform the function of a flywheel. The corresponding design principle makes it possible to solve the problem in the first approximation, but sometimes with great difficulty, so it is necessary to pay attention to the machine unit as a whole, and not just the mechanical transmission.

Based on the basic mathematical model of the machine unit using the principle of mass and force reduction, three variants of dynamic models were obtained depending on the choice of the link of construction, in order to optimize the kinematic and force parameters of the machine unit.

As a result of the analysis of dynamic models it is concluded that the most optimal solution of problems of optimization of kinematic and dynamic parameters of the machine unit is the complex approach which consists in designing not the drive scheme and the machine unit as a whole. That is, using only a standard electric motor, and the executive body of the machine and the mechanical transmission to design as a whole. This approach will provide the optimal solution to almost any problem posed to engineers and designers by modern production.
Kurt Daluege : un puissant véhicule de l’idéologie génocidaire de la SS
Authors: Mineau Par André
Published: April 2021

Dans le cadre de ses fonctions, Kurt Daluege a été un opérateur génocidaire de haut niveau. Au service de l’indicible inhumanité de l’État nazi, il a présidé en partie aux crimes contre l’humanité commis en Pologne, en Bohême-Moravie et en Union soviétique. Mais il a été par ailleurs un véhicule important de la pensée SS. En plus de compter deux monographies à son nom, Daluege a rédigé ou prononcé un grand nombre d’articles et de discours, avec l’aide du personnel de son bureau. D’un point de vue quantitatif, sa production de textes, comparable à celle de Himmler, a été largement supérieure à celle de n’importe quel autre officier SS.

La présente étude a pour objet précis l’idéologie SS telle que comprise et développée par Daluege. Il ne s’agira pas ici de décrire la police d’ordre pour elle-même, par rapport à son organisation et à son évolution. En laissant de côté les fonctions de gestionnaire de Daluege, il s’agira plutôt de présenter ce dernier en tant qu’orateur et en tant qu’auteur de la SS. On essayera ainsi de voir comment Daluege, dès les débuts du régime nazi, a contribué à sa manière à l’expression de la pensée SS, en choisissant d’aborder certains thèmes centraux d’une idéologie dont Himmler représentait, à l’intérieur de l’Ordre Noir, la caution finale. On doit remarquer ici que la pensée de Daluege comportait des éléments singuliers qui lui donnaient une coloration personnelle et particulière, à l’intérieur même de la pensée SS.
Identités paradoxales et prétendument irréconciliables dans l’œuvre de 2Fik : une polysémie désidentificatrice
Authors: Hakeem Hasheem
Published: April 2021

Dans le cadre de cet article, nous proposons une analyse de l’œuvre de l’artiste-performeur montréalais 2Fik dans le but de faire ressortir la manière dont il conçoit, construit et performe l’identité québécoise dans une optique intersectionnelle. Nous situons d’abord son travail dans le contexte des politiques identitaires qui imprègnent le Québec actuel, remontant jusqu’à l’émergence de la crise des accommodements raisonnables en 2006. À la suite d’une analyse du discours, notamment législatif, nous partons du principe que l’idée d’une identité québécoise de souche constitue une construction sociale et politique. En nous appuyant sur le concept théorique de désidentification de José Esteban Muñoz, nous montrons, à travers l’analyse de deux de ses œuvres photographiques, que 2Fik recycle et recode des stéréotypes caricaturaux pour ensuite déconstruire la conception essentialiste de l’identité québécoise. Ce faisant, il utilise la performance queer comme un outil pour penser le Québec dans sa pluralité intersectionnelle.