bluuebunny/crossref_metadata_2025 huggingface dataset:
A brief digression into the history of the emergence, formation and development of foreign criminology
Authors: Клевцов К.К.
Published: October 2023

Ознакомление с историческими аспектами зарубежной криминали-стики позволяют по-иному взглянуть на тенденции развития данной науки антикрими-нального цикла в контексте сравнительного правоведения, поскольку только через связь настоящего и прошлого представляется возможным наиболее объективно по-знать те или иные закономерности конкретного явления. Материалы и методы. В ходе исследования применялись следующие методы, а именно: философские (диалектико-материалистический); общенаучные (анализ и синтез, индукция и дедукция, абстрагирование); дисциплинарные (статический); част-нонаучные (догматико-юридический, сравнительного правоведения). Результаты исследования позволили обратить внимание на криминалистику с несколько иной позиции, в частности через призму зарубежных подходов в их истори-ческой взаимосвязи в различные периоды (Древний мир, Средневековье, Новое время и Новейшее время). Выводы и заключения. Проведенный анализ позволяет в дальнейшем исполь-зовать полученные знания при преподавании отечественной дисциплины «Криминали-стика», а также в ходе получения более глубоких научных знаний, связанных с зарож-дением, становлением и развитием криминалистики. Вместе с тем проведенное иссле-дование не лишено и практической значимости, которая заключается в возможности прогнозирования и установления неких закономерностей развития конкретных крими-налистических областей, в особенности техники и тактики.

acquaintance with the historical aspects of foreign criminology al-lows us to take a different look at the development trends of this science of the anti -criminal cycle in the context of comparative law, since only through the connection of the present and the past it seems possible to most objectively learn certain patterns of a particular phenomenon. Materials and methods: in the course of the study, the following methods were used, namely: philosophical (dialectical-materialistic); general scientific (analysis and synthesis, induction and deduction, abstraction); disciplinary (static); private scientific (dogmatic legal, comparative law). Results of the study: made it possible to pay attention to forensic science from a slightly different position, in particular through the prism of foreign approaches in their historical relationship in different periods (the Ancient World, the Middle Ages, Mod-ern Times and Modern Times). Findings and conclusions: the analysis carried out makes it possible to further use the acquired knowledge in teaching the domestic discipline "Criminalistics", as well as in the course of obtaining deeper scientific research related to the origin, formation and development of forensic science. At the same time, the study is not without practical significance, which lies in the possibility of predicting and establishing certain patterns in the development of specific forensic areas, especially technology and tactics. Keywords: foreign criminalistics, technique, tactics, Ancient times, Middle Ages, Modern times, Modern times.
Tázlár–Templomhegy késő szarmata település kerámiaanyagának petrográfiai elemzése
Authors: Bozsik Vivien , Walter Dorottya , Fintor Krisztián , Kreiter Attila , Vörös Gabriella
Published: October 2023

In this study we present the results of archaeometric analyses on a ceramic assemblage uncovered from the late Sarmatian settlement in Tázlár-Templomhegy, Hungary. A particular feature of the settlement is that it represents the complete range of Sarmatian pottery in terms of vessel types and building techniques such as wheel-thrown grey vessels, wheel-thrown pebbly (Üllő type) vessels, hand-built household wares, and wheelshaped micaceous-pebbly vessels. In this study the archaeological and petrographic analysis of 17 sherds were carried out. The aim of this study is to characterise the fabrics of the examined vessels and attempt to determine the provenance of the tempering material of the wheel-thrown (Üllő type) and the wheel-shaped micaceouspebbly vessels. The results show that the tempering inclusions of the wheel-thrown (Üllő type) vessels correspond with coarse to very coarse grain size and have well-rounded shape and metamorphic texture. These inclusions could have originated from the upper basin of the Danube River or from the Western Carpathians accumulating in the nearby area of the settlement in the form of fluvial sand. The tempering of wheel-shaped micaceous-pebbly ceramics originates from granitoid rocks, which are found on the surface area of the Apuseni Mountains, Romania. The defined rock fragments in the thin sections are most probably Carboniferous Codru granitoids.
Machining of Inconel 825 Using Distilled Water Based MQL Technique
Authors: Journal IJSREM
Published: October 2023

Because of its high hot strength and corrosion resistance, Inconel 825 superalloy has various industrial uses in the aerospace, nuclear, automotive, and defense industries. However, characteristics like as work hardening, poor heat conductivity, and chemical reactivity with tool material make it "difficult-to-machine." Its machining via the traditional approach is difficult for industries. The machining behavior of Inconel 825 under distilled water-based minimum quantity lubrication (MQL) is examined in this work using a PVD- TiN/TiCN/TiN coated cermet insert. The tool's tip temperature, cutting force, and flank wear are all investigated. Keywords: Inconel; corrosion resistance; MQL; cermet.
HEMŞİRELİK ÖĞRENCİLERİNİN OLUMSUZ BESLENME ALIŞKANLIKLARINI ETKİLEYEN FAKTÖRLER
Authors: Yıldız DAŞ GEÇİM Gözde , TERZİ Banu
Published: October 2023

Günlük besinler yaşam boyu büyüme ve gelişmeyi destekler ancak ergen üniversite öğrencilerinde görülen dengesiz beslenme önemli bir sosyal sorundur. Buna bağlı olarak hemşirelik öğrencilerinin beslenme alışkanlıklarının değerlendirilmesi ve bu alışkanlıklara etki eden faktörlerin incelenmesi gerekmektedir. Bu çalışmanın amacı hemşirelik öğrencilerinin beslenme alışkanlıklarını ve etkileyen faktörleri incelemektir. Bu araştırma, Türkiye'de bir üniversitenin hemşirelik bölümü öğrencileri (n=217) ile kesitsel, tanımlayıcı ve ilişki arayıcı olarak yapılmıştır. Araştırmanın verileri Katılımcı Bilgi Formu ve Günlük Beslenme Kayıt Formu ile toplanmıştır. Öğrencilerin %48,4 (n=105)’ünün sık sık yağlı besinler tükettiği, %36,4 (n=79)’ünün ara öğünleri ve %31,8 (n=69)’inin öğlen yemeklerini atladıkları saptandı. Yağdan elde edilen enerji, gelir düzeyi yüksek olan öğrencilerde diğer gelir düzeyine sahip öğrencilere göre istatistiksel olarak anlamlı şekilde daha yüksek bulundu (p<0.05). Hemşirelik öğrencilerinin beslenme alışkanlıklarını olumsuz etkileyen faktörler detaylı bir şekilde araştırılabilir ve bunları giderecek kurumsal düzenlemeler yapılabilir.
RUTTING PERFORMANCE OF TREATED LOW-DENSITY POLYETHYLENE AS ADDITIVE ON THE SUSTAINABLE MIXTURE
Authors: Naqibah Kamarudin Siti Nur , Rosli Hainin Mohd , Naqiuddin Mohd Warid Muhammad , Khairul Idham Mohd , Naadia Mazlan Ain , Azah Abdul Raman Noor , Hazim Al-Saffar Zaid
Published: October 2023

Rutting is a major distress issue in conventional flexible pavements causing the service life of road pavement reduced. A lot of efforts had been carried out to modify the hot mix asphalt mixture to overcome the problems. However, asphalt modification mainly increased the initial cost of road construction, which had forced many road agencies and researchers to use waste materials as modifiers. In this study, the potential use of low-density polyethylene powder made by waste plastic bag (treated) as an additive on the performance of rutting resistance was investigated by Marshall, resilient modulus, dynamic creep and double wheel tracker tests. The results showed that 0.75% of treated plastic (TP) by weight of total aggregate attained higher performance in rutting resistance than the conventional mixture. It can be concluded that the waste material additive not only increases the mixture performance but more towards mixture sustainability.
MECHANICAL BEHAVIOUR OF CARBON AND JUTE FIBERS REINFORCED ALUMINIUM LAMINATES FABRICATED IN DIFFERENT STACKING SEQUENCES
Authors: Palani Sathyaseelan , Kumar Rajamanickam Ramesh , Dilip Raja Narayana
Published: October 2023

In this research work, the mechanical properties of aluminium laminates having carbon fiber reinforcement and carbon-jute fibers reinforced aluminium laminates fabricated in different stacking sequences are studied. Here the fiber metal laminates are manufactured through the hand layup technique. A compression moulding machine was used to press the laminates during the production process. In this study, carbon and jute fibers along with thin aluminium sheets are used as reinforcement. Four different stacking sequences were selected. Each arrangement is symmetric and consists of ten layers of reinforcements. The fabricated laminates were subjected to tensile, compressive, flexural, hardness and impact tests. The test results show that the laminate L2 with outermost layers of carbon fibers revealed the highest tensile strength of 268 MPa, followed by L4 laminate with jute fibers outer layers having a tensile strength of 226 MPa. Whereas, the laminates L1 and L3 with outer layers of aluminium sheets show improved flexural and impact strength along with high hardness value. The flexural strengths are 246 MPa and 204 MPa respectively. Impact strength of 36 MPa, 32 MPa and hardness value of 64 HVN and 62 HVN respectively.
EVALUATION OF MECHANICAL BEHAVIOUR AND EFFECT OF PARTICLE SIZE ON LM26/Gr METAL MATRIX COMPOSITE
Authors: Lakshmi Chaitanya Konda , Srinivas Kolla
Published: October 2023

In automotive industries, Aluminium cast alloy (LM26) is well-renowned material in the fabrication of pistons for both diesel and petrol engines for its superior casting and mechanical properties. However, diminishing strength at higher temperatures drives metal matrix composites in cast alloys. The present study focused on the impact of naturally available ceramic particles Garnet on the microstructure and mechanical properties of Aluminium cast alloy (LM26). Samples were fabricated with varied Garnet (Wt. % of 3, 6, 9, and 12) by dual step stir casting technique. Two different particle sizes (400µm and 250µm) were incorporated to determine the effect of particle size on composite mechanical behaviour. Scanning electron microscope images unveiled the dissemination of ceramic particles inside the cast alloy matrix. It was found that ultimate tensile strength, yield strength, and impact strength were increased up to a certain Garnet percentage and started diminishing with the rise in particulate fraction for both particle sizes. However, the increase in hardness value indicates the brittleness of Metal matrix composite with the increase in ceramic reinforcement. Validation of Experimental results with theoretical values was also discussed.
BACTERIAL AMYLASE PRODUCTION BY THE L-LACTIC ACID-PRODUCING STRAIN USING CASSAVA STARCH SUPPLEMENTED WITH RICE BRAN
Authors: Sumalu Rattaporn , Songsiriritthigul Chomphunuch , Yongsawatdigul Jirawat , Rodtong Sureelak
Published: October 2023

Amylase is a crucial starch-degrading enzyme, which is commercially available, prvides benefit to starchy industry to overcome viscosity problem that caused by using high starch concentration, and to supply sugar residues. This study aimed to investigate the production of amylase by the potential optical pure L-lactic acid-producing Lactococcus sp. SUT 513 for further development of the optical pure acid fermentation process from the cheap cassava starch. Rice bran, the main byproduct in the process of rice milling, was found to provide the maximum amylase production when supplemented with 4.0 g/L (w/v) to the medium containing cassava starch (20.0 g/L, w/v), compared to the cassava medium added either the expensive nitrogen source, tryptone (5.0 g/L) and yeast extract (3.0 g/L, w/v); or the cheap alternatives, soy ptotein (8.0 g/L) or urea (2.0 g/L) combined with yeast extract (3.0 g/L). The amylase activity obtained from the developed medium was approximately 3 times higher than the original medium. This bacterium gave the highest crude amylase activity of 4.848±0.237 U/mL in the suitable medium performed in a7.5-L bioreactor with 3.0-L working volume for the optimal cultivation time of only 18 h under a control pH of 7.0, temperature at 35°C, agitation at 150 rpm, and without aeration. The results reveal the high potential production of amylase by Lactococcus sp. SUT 513 using the cheap cassava starch medium supplemented with rice bran, providing an opportunity to develop both amylase and optically pure L-lactic acid production processes.
As missões jesuíticas e sua influência na ocupação da fronteira Brasil-Paraguai
Authors: De Azevedo Suelen Terre , Serra Elpidio
Published: October 2023

As fronteiras se caracterizam através das contrapartidas culturais da matriz sociocultural histórica comum promovida pelas missões jesuíticas. Este trabalho tem como objetivo analisar as particularidades e a historicidade do povo Guarani abrangido pelas Reduções Jesuíticas. A análise é feita através de peculiaridades espaciais, temporais e contextuais, verificando a influência desse povo na configuração étnica e cultural da fronteira entre Brasil e Paraguai. A metodologia utilizada foi a revisão bibliográfica, envolvendo a análise de fontes secundárias relevantes. Como resultados, foi observado que as missões jesuíticas na área de fronteira impactaram na criação de uma cultura mesclada com os povos nativos. Os jesuítas tiveram um papel categórico como agentes dessas mudanças, promovendo uma mistura cultural e uma reorganização social na comunidade indígena. A habilidade do povo Guarani em se ajustar ao processo de reterritorialização foi essencial para sua sobrevivência.
Monitoramento de nematóides fitoparasitas na cultura da cana-de-açúcar
Authors: Carvalho Valdemar de Paula
Published: October 2023

A cultura da cana-de-açúcar tem importância destacada na economia do Brasil. O país é o maior produtor mundial desta cultura, bem como de açúcar e etanol de cana-de-açúcar. Entretanto, o estabelecimento da monocultura por vários anos, em uma mesma área, pode levar a perdas no rendimento devido à ocorrência e proliferação de doenças inerentes à cultura. Dentre elas, encontram-se as doenças causadas por nematóides fitoparasitas do gênero Pratylenchus sp. Dentre as espécies de maior ocorrência está o Pratylenchus zeae. Com o objetivo realizar o monitoramento populacional dos nematóides fitoparasitas associados à cultura da cana-de-açúcar na região Sudoeste de Goiás, foi coletado um total de 320 amostras entre os anos de 2020 e 2021 em canaviais localizados nos Municípios de Quirinópolis e Paranaiguara. Desse total, 179 amostras, representando 55,9% das amostras coletadas, apresentaram nematóides fitoparasitas e foram utilizadas para a determinação dos densidades populacionais nas áreas avaliadas. Os resultados mostraram que os nematóides fitoparasitas presentes nas amostras analisadas no presente trabalho pertencem ao gênero Pratylenchus sp. e ocorreram com distribuição heterogênea em relação ao local e a época de coleta, provavelmente proporcionada pelas estações secas e chuvosas. De maneira geral para todas as amostras que apresentaram nematóides fitoparasitas, a densidade populacional foi baixa quando comparada àquelas densidades consideradas capazes de causar danos ao cultivo da cana-de-açúcar. Embora a densidade populacional, observada nas áreas avaliadas, tenha sido insuficiente para causar prejuízos à cultura da cana de açúcar, a incidência de nematóides fitoparasitas indica a necessidade de monitoramento constante, no sentido de acompanhar a evolução da população como medida preventiva de controle deste fitoparasita.
A evasão escolar no curso de pedagogia da Universidade do Estado do Pará
Authors: De Farias Junior Raimundo Sérgio , Moreira Lana Larissa dos Prazeres , Ferreira Bruna Pinheiro
Published: October 2023

A evasão escolar tem se consolidado em um problema complexo que afeta a educação em seus diversos aspectos. O fenômeno é caracterizado como a saída do estudante da universidade ou de um de seus cursos, definitiva ou temporária, por motivos de natureza financeira, econômica ou social. Nessa perspectiva, esta pesquisa buscou analisar os fatores endógenos e exógenos que ensejam a evasão no curso de Pedagogia da Universidade do Estado do Pará, campus Moju. Para tanto, foi realizado um estudo de natureza bibliográfica, relativa ao tema e posteriormente sendo complementado por outro de natureza empírica. A investigação se concretizou mediante ao emprego de questionário semiaberto, aplicado junto a dez discentes do curso de Pedagogia, sendo três homens e sete mulheres. O recorte temporal compreendeu os anos de 2013 a 2015. Por meio dos questionários foi possível traçar o perfil do aluno evadido, identificar e compreender os principais fatores que influenciaram a evasão. Os resultados apontam a necessidade de fomentar políticas públicas voltadas para o combate à evasão, tendo em vista minimizar os efeitos desse fenômeno na educação superior.
The Effect of Relation Between Digital Leadership and Learning Organization on the Individual Performance of SMEs
Authors: Karollah Banta , Juned Vilzati , Eliana  , Nurbismi
Published: October 2023

Objective: This research aims to analyze the relationship between digital leadership variables and individual performance of SMEs, to analyze the relationship between learning organization variables and individual performance of SMEs.
 
Method: This research method is a quantitative survey, data analysis using partial least squares (PLS) structural equation modeling (SEM) with SmartPLS 3.0 software tools. Data was obtained by distributing online questionnaires via social media. The questionnaire was designed using statements with a Likert scale of 1 to 7. The respondents of this study were 350 SMEs owners in Indonesia who were determined through simple random sampling. The analysis stages are validity test, reliability test and significance test. The independent variables of this research are digital leadership and learning organization variables. The dependent variable is the individual performance of SMEs.
 
Results: The results of this research are that digital leadership has a positive and significant relationship to individual performance. Learning organizations have a positive and significant relationship to individual performance of SMEs.
 
Research implications: Such findings contribute to our better understanding of the relationship between digital leadership and learning organization on the individual performance of SMEs. Also, it can have implications for stakeholders in developing performance of SMEs.
 
Originality/value: This study addresses the gap in the body of digital leadership and learning organization on the individual performance of SMEs, creating a new correlation model of the relationship between digital leadership and learning organization on the individual performance of SMEs.
Assessment of Research Competences in University Students from the Peruvian Amazon: A Cross-Sectional Study
Authors: Mamani-Roque Maribel , Mamani-Roque Milton Raul , Aguilar-Velasquez Roberto Anacleto , Estrada-Araoz Edwin Gustavo , Jara-Rodríguez Franklin , Roque-Guizada César Elías
Published: October 2023

Objective: In the university context, research competences acquire a transcendental role for the integral development of students and the advancement of knowledge in all academic disciplines. Therefore, the objective of the present research was to evaluate the research competences of students of the Peruvian Amazon universities who attend the ninth and tenth semester.
 
Method: The investigation was developed under a quantitative approach; the design was non-experimental and the type was cross-sectional descriptive. The sample was made up of 135 students to whom the Research Competences Questionnaire was administered, an instrument with an adequate level of validity and reliability.
 
Results: According to the results, the level of development of the research competences of 43.7% of students were low, of 37% was medium, while 19.3% was high. Likewise, the organizational competences, communicational competences and collaborative competences dimensions were also valued at a low level. On the other hand, it was found that the level of research competencies was significantly associated with the semester of study in which the students were (p<0.05).
 
Conclusions: It was concluded that the level of development of the research competences that characterized students was low. Therefore, it is recommended that the competent university authorities promote a culture of research in the academic environment and provide specific research training programs.
A NEW APPROACH TO THE FORECAST OF PORPHYRY COPPER DEPOSITS ON THE BURIED TERRITORIES OF KAZAKHSTAN
Authors: Muratkhanov Daulet , Kembayev Maxat , Sayat Rais
Published: October 2023

The wealth of the bowels of Kazakhstan has not yet been exhausted, there are promising areas that are currently insufficiently studied, especially at depth. The reason for the insufficient knowledge of geological structures in depth is the lack of a theoretical basis for geological research and justification for the forecast of prospect for minerals. In this regard, geology faces the question of creating a scientific approach for predicting new prospect areas, especially at depth. Our analysis shows that the principles of plume tectonics can serve as such a theoretical scientific basis for predicting promising areas and setting up prospecting work on them. To identify new prospecting areas in promising areas, we used materials from Earth remote sensing of the in combination with field geological and geophysical work. To verify the geophysical anomalies, mapping and exploration wells were drilled, which confirmed the prospects of the anomalies for further geological research. Practical testing of the reliability of the proposed theoretical base was carried out on a new promising area and the presence of porphyry copper mineralization was established, which could not be detected by traditional methods of geological research used in Kazakhstan. Research work, which revealed new porphyry copper occurrences, was carried out on a promising area within the Eastern Balkhash region.
SEISMIC PROSPECTING FOR THE RECEPTION OF SOUND WAVES, THE GEOPHONE
Authors: Jurian Mariana , Muslim Enis
Published: October 2023

This paper presents an electro-acoustic instrument, used in geophysical (seismic) prospecting, for the reception of sound waves, namely the geophone. The geophone is a transducer which transforms the displacement of the soil particles into electrical signals. The article aims at presenting the functioning of a standard electromagnetic geophone and of the newer geophone models, built using the MEMS (micro-electro mechanical systems) technology. Below, a scheme for amplifying the original signal generated by a SM-24 geophone, and by the MCP6286 operational amplifier, will be proposed.
ASSESSMENT OF THE NAKAMURA'S VULNERABILITY INDEX OF AN EARTHEN DAM, FROM AMBIENT NOISE RECORDINGS
Authors: Oynakov Emil , Ivanov Radan , Aleksandrova Irena , Milkov Yordan , Popova Maria
Published: October 2023

Among the important parameters determining the likelihood of occurrence of significant damage to engineering structures during an earthquake are the dynamic and seismic characteristics of the structures such as natural frequency, damping coefficient, and vulnerability index of the structure.
In this article, the Nakamura method is applied to investigate the seismic stability of an earth-filled dam wall and the surface layer using microtremors. Measurements were taken at seven points on the dam crest and three points at its base. All measurements were taken using two mobile accelerometers (ETNA 2), with a recording frequency of 100 samples/second. The recording time at each point was 20 minutes. The accelerometer's y axis was aligned with the dam crest�s normal, and the x axis was parallel to the wall. The data was processed using the GEOPSY v.3.4.1 program, by which a geotechnical test was performed for the site � computation of the horizontal to vertical spectral ratio (HVSR). Graphs of the spectral H/V ratios for each observation point were made. The vulnerability indices for each point were calculated.
Using the obtained vulnerability indices, it was shown that neither the dam nor its base layer are likely to suffer damage due to an earthquake with peak ground acceleration of 0.37g., which is the design event for the region where the dam is located. The study is the first of its kind in Bulgaria, and was carried out in full by the authors.
BENDING OF AN ELASTIC ENDLESS PLATE CONSIDERING THE CONTACT WITH AN ELASTIC SUBGRADE
Authors: Tvrda Katarina
Published: October 2023

In recent decades, we have witnessed an extraordinary progress in tasks related to the problems of the interaction of building structures with the subsoil. The transition from low-rise buildings to high-ones, the design of more subtle structures hand in hand with the full use of building materials, places increasing demands on the methods of foundation of building objects. These tendencies might result in some problems when the issues of the interaction between the upper structure and the subsoil assume a dominant role. It concerns building constructions, industrial, water and road constructions. The problems of the interaction of the upper structure with the subsoil on which the structure is placed are primarily problems of foundation structures and foundations in general. Foundation structures are the connecting element between the superstructure and the subsoil and are supposed to transfer the load of the superstructure to the subsoil without failures. It is obvious that the knowledge of the actual foundation parameters, the appropriate choice of the foundation structure and its dimensions, the calculation of the actual stresses and deformations in the foundation gap leads to a significant economic effect. Solutions for contact tasks have undergone a long development. Winkler was a pioneer in the analysis of bending of plates on an elastic subsoil loaded with concentrated force and a moment. Later, other subsoil models came into use, too. Currently, contact tasks can be solved using FEM. The presented article deals with the bending of a plate of infinite length placed on an elastic foundation. The bending of the plate of infinite length is characterized by a differential equation, while the subsoil is characterized by the integral equation of the displacement of the edge of the half-space. Contact stresses originate at the contact between the plate and the subsoil. The contact stresses of the symmetrically loaded plate strip are assumed in the form of multiples of unknown coefficients and Legendre polynomials of the first kind. The equations have been solved using an indirect method. The effects of the individual function members of the function on the plate strip and on the subsoil are determined separately, thereafter their most suitable combination is calculated from the condition of the equal deformation on the subsoil and on the plate. The effectiveness of the presented procedure is demonstrated on a particular example.
DISRUPTIVE TECHNOLOGY FACILITY OPTIONS IN A COMPLEX INFRASTRUCTURE ENVIRONMENT
Authors: Prodanov Kosta
Published: October 2023

Subway construction in the central parts of cities requires the implementation of the latest technological advances in underground construction. These achievements relate to the construction of the main road arteries of the metro. Despite the implemented technical innovations in mass construction, problems need to be solved that require a creative approach for unique cases in technology and security.
Risk cases along the subway route are most often concentrated in areas in contact with existing facilities and continuous traffic on the adjacent infrastructure. In these areas, problems arise with the security of underground structures both during construction and during operation.
The most serious cases in practice are when crossing existing subway lines, as well as during the reconstruction of subways and subway stations under the main boulevards of the capital. Then it is necessary that the temporary steel facilities are not only an auxiliary part of the process of realization of technical solutions, but become a main component in solving the problems of security and risk in the stages of construction.
The application of destructive technologies in the reconstruction of existing underground facilities requires a combination of the basic principles between bridge and tunnel construction. The combination of these principles leads to unique technical solutions for underground constructions in an infrastructure-saturated urban environment.
Through the discussed geomechanical aspects with specific examples, the report aims to support the practice of mathematical modeling and construction in an urban environment of underground metro facilities.
SYSTEM FOR RISK MANAGEMENT, PREVENTION AND PROTECTION ON ROAD INFRASTRUCTURE SLOPES
Authors: Zhetchev Nikolay
Published: October 2023

One of the main sources of risk on slopes in the road infrastructure is the lack of sufficient technical awareness and creative competence of the specialists involved in the investment process. The impact of these sources can be minimized by implementing an appropriate risk management, prevention and protection system in slope stabilization. This system should ensure continuity of geotechnical judgment during geological survey, analysis, design and construction.
Geotechnical risk should be considered as a product of the operation of the road infrastructure safety system. In this regard, it is of particular importance to adopt a systematic approach to the study of landslide and collapse risk. Accident prevention and road protection can be considered in accordance with the critical event concept. Measures aimed at reducing the probability of a decisive event are preventive. When measures are aimed at reducing the degree of consequences after a decisive event, they are protective.
It is envisaged that this system will help provide clarity to ensure a focus on the assessment and management of the risk of landslides and collapses on roads. The system is also discussed in connection with damaged sections of the road infrastructure.
THE HALF-TUNNEL - AN ALTERNATIVE FOR THE PREVENTION OF EXISTING FORTIFICATIONS
Authors: Rafailov Rafail
Published: October 2023

The problem is actual when slope stabilizations are implemented, when the strengthening systems and re-slopes cannot secure road traffic. There are three main reasons for the problem: climate changes, insufficient funds for strengthened infrastructure and implementation by companies without experience in geotechnical construction. A half-tunnel is used in the presence of a retaining wall, which needs to be integrated into the structure of the new facility. For environmental reasons and traffic safety requirements, the earth-rock masses that have fallen on the facilities are not allowed to get over them. Due to the lack of structural criteria for the implantation of the existing walls to the new bridging, in the present study, specific rules are defined for the volume of retained ground mass on the facility and the structural parameters of the facilities. Conclusions are drawn and recommendations for practice are made.
ANALYSIS OF THE STABILITY OF THE CUIBARUL WASTE DUMP IN THE ROSIA POIENI MINING PERIMETER
Authors: Gusat Dorel , Bud Ioan
Published: October 2023

The paper presents a synthesis of the results of the GoldenEye project type H2020 No. 869398 regarding the state of the Cuibarul waste dump of the Rosia Poieni Open Pit in Romania, its chemical and mechanical stability which jeopardizes the surrounding environment. During the project, the factors that influence the stability of the dump were followed, such as: -dumping technology; the geological, hydrogeological and hydrological conditions of the location; the geomorphological conditions of the dump site, the physical-mechanical properties of the rocks at the base of the dump; the physical-mechanical properties of the material that constitutes the dump. Detailed topographic surveys were carried out both on the ground and using drone topographic measurements. The Cuibarul dump represents the most important waste deposit within the Rosia Poieni exploitation perimeter. It has an occupied area of 81ha and a stored volume of approx. 49,400 thousand m3 of tailings. The total available area was only 78.5 ha, with a projected capacity of 85,600 thousand m3.
EVALUATION OF THE SECURITY QUALITY OF SEMI-FINISHED PRODUCTS CONTAINING PYROTECHNIC ARTICLES DESTINED FOR THE AUTOMOTIVE SECTOR
Authors: Vasilescu Dragos Gabriel , Rus Daniela , Popa Narcis , Ilcea Gabriel Ioan , Darsy Anton
Published: October 2023

The identification and analysis of the dangers of accidental initiation/detonation of pyrotechnic devices with a technical purpose in the automotive field containing pyrotechnic articles of category P1 is carried out on the basis of the results obtained following the performance of specialized tests according to the applicable reverential SE EN ISO 14451. The evaluation of the safety quality of these types of products is of particular interest both for occupational safety in their manufacturing process because their untimely triggering can endanger the life and health of workers and in the field of urban transport through the dangerous exposure of drivers and or passengers to the uncontrollable effects of detonation with the generation of thermal and dynamic effects as well as the emission of toxic reaction products that can affect the human component and or the vehicle. The paper highlights the way to analyse and evaluate the effects generated by the accidental release of category P1 pyrotechnic devices following their exposure to different external stimuli for their untimely initiation, thus simulating different real danger situations.
EXPLOSION LIMITS EXPERIMENTAL DETERMINATION FOR GASOLINE, DIESEL FUEL AND ACETONE VAPORS
Authors: Prodan Maria , Szollosi-Mota Andrei , Nalboc Irina , Suvar Sonia , Ghicioi Emilian
Published: October 2023

In chemical processes, fire and explosion prevention is crucial, especially when flammable liquids or gases are present because they can create explosive atmospheres of gas or vapour in the air. These include oil-based products and organic solvents. It is essential to understand these compounds' characteristics as well as the size of an explosive atmosphere. Explosion hazards as well as the locations where explosive atmospheres are present can be identified and assessed. Safety data sheets also contains crucial information on explosive limits. It is important to establish by physical determination the explosion properties of process chemicals in order to provide recommendations for explosion protection and explosion prevention. The purpose of this research was to identify the experimental explosion properties for a few chosen items, such as LEL and minimum ignition temperature. The studies were completed in line with EN 1839 by method B and IEC 60079-20-1. The experiments were carried out in a 5 dm3 internal volume, closed, spherical vessel and in standard oven for minimum ignition temperature.
HIGH JEWELLERY PROCESSES TODAY: BETWEEN TRACEABILITY AND TECHNOLOGY
Authors: Freitas Francesca Antinarelli , Cappellieri Alba , Rossato Beatrice , Tenuta Livia , Testa Susanna
Published: October 2023

The high jewelry industry, and its supply chain, are considered complex systems that have positively affected the global economy as well as potentially harmed the environment and society due to its resources exploitation. As a consequence, consumers are increasingly demanding for sustainable processes that guarantee traceability through the extraction and manufacturing phases. The aim of this paper is to present and evaluate potential solutions for the traceability of high jewelry raw materials. First of all, this paper is intended to analyze how recent initiatives have demonstrated that the mining process is the most challenging one in terms of sustainability. Secondly, the paper focuses on Information technologies, including Blockchain-based technologies such as Radio Frequency Identification (RFID), Non-Fungible Token (NFT) and Near Field Communication (NFC). To address this issue, high jewelry companies and organizations have started integrating these technologies providing superior alternative in terms of verifiability, traceability, and security in comparison to paper-based methods. To this end, this paper offers a detailed overview of current methods of traceability for precious high jewelry raw materials, including gold, diamonds, and colored gemstones. In conclusion, the paper presents a comparison of different methods of traceability available, considering and evaluating opportunities and challenges for existing methods as well as potential new initiatives.
NUMERICAL MODELLING OF THE ACCUMULATION OF NITROGEN OXIDES IN DEAD-END AND MAIN WORKINGS
Authors: Amosov Pavel
Published: October 2023

The results of numerical simulation of the accumulation of nitrogen oxides in the deadend and main workings during the operation of the mucking and flitting device at the stages of loading and auxiliary operations are presented. The process of accumulation of nitrogen oxides is modeled on the basis of a previously developed two-stage methodological approach: the 1st stage is the calculation of aerodynamic parameters with applying a standard (?? ? ??)-model turbulence and the 2nd stage is the solution of the convective-diffusion equation. Numerical experiments were performed for the ranges of air rate in a main working (6 ? 12 m3/sec), the length of a dead�end working (10 ? 25 m) and air leakage-suction (-0.05 ? +0.05 m3/sec) through the failure zone of a dead-end working with a length of 10 m. The results of the analysis of the accumulation of nitrogen oxides in the dead-end and main workings with variations of these parameters are presented. Significant pollution of the atmosphere of the main working was noted at the minimum length of the dead-end working. Almost linear dependences of concentration and mass rate on the amount of leakage-suction and time are predicted with the accepted values of leakage-suction and air rate. The approach used with minor modifications can be used both for other geometric dimensions of workings, and for various types of initial conditions of gas contamination of dead-end workings during blasting and operation of equipment with internal combustion engines.
DETERMINATION OF THE PHYSICO-CHEMICAL PROPERTIES OF LYCOPODIUM AND STARCH COMBUSTIBLE POWDER
Authors: Szollosi-Mo?a Andrei , Prodan Maria , Nalboc Irina Vasilica , Suvar Sonia Niculina , Toplician Iuliana Asimina
Published: October 2023

Fine particles known as combustible dusts can cause explosions when they are suspended in the air under certain conditions. A dust explosion could result in severe fatalities, injuries, and structural devastation. The risk of such events can be reduced by knowing the flammability parameters and the physico-chemical analysis for combustible dusts, in order to take additional protective measures generated by the occurrence of these types of explosive mixtures. The purpose of this research was to identify the flammability properties for two combustible dusts, lycopodium and starch, such as minimum ignition temperature of the dust cloud and dust layer, and some physico chemical analysis regarding the composition.
RESEARCH ON THE LOCAL EFFECTS OF THE DETONATION OF IMPROVISED EXPLOSIVE DEVICES ON THE STEEL BUILDING FRAMES
Authors: Jitea Ciprian , Kovacs Attila , Ghicioi Emilian , Gheorghiosu Edward , Dinu Florea
Published: October 2023

Explosions may have severe consequences on the integrity of structural or nonstructural elements of a building. Being considered events with a low probability of occurrence, they are not considered directly in the design, except in certain special situations (accidental design situations). In the case of deliberate attacks, placing explosive devices at short distances or even attached to building elements can cause major local failures. Local failure and potential loss of load carrying capacity are dependent on local conditions in the structural elements (load and end support conditions, mechanical properties of material). The paper presents the results of recent research carried out on the response of steel building frames under blast loading. The data of the experimental testing, combined with the numerical modelling, allowed to investigate the local failure mechanism in the elements and the global response of the structure to the applied blast load.
STABILITY EVALUATION SYSTEM OF DISUSED MINE SHAFTS IN OSTRAVA BASIN
Authors: Kotrbanec Juraj
Published: October 2023

Along with the enlarging of post-mining towns, the use of abandoned mining areas for various purposes is gradually being approached. This raises the question of the safety of the closed shafts. The following article discusses the determination of attributes which can help to reveal stability problems of disused mine shafts with the increasing of mine water level in Ostrava Basin. The first part is devoted to the need to obtain the most relevant documents about each of the shafts. These documents include data from the treatment of the shaft, backfilling, historical data about excavation, collapses, geology, or data on gas emissions from shaft cap. The next part is focused on the study of historical shaft collapses both in Czech Republic and abroad, thorough study of the cases of their occurrence, their possible connection with the affection of mine water and its potential impact on the backfill material of reinforcement of the shaft. The last part explains the process of selecting key attributes for the compilation of the evaluation algorithm, their subsequent incorporation into the database and the resulting evaluation proposal for individual disused mine shafts within the Ostrava Basin. The goal is to use these findings for the future development of a universal stability evaluation system for all the disused mine shafts.
STREAMLINING THE ACTUATION OF HEAVY AND HIGH-MAGNITUDE DYNAMIC LOAD HYDRAULIC CYLINDERS IN THE FIELD OF EXPLORATION AND MINING
Authors: Popescu Teodor Costinel , Chirita Alexandru-Polifron , Popescu Ana-Maria Carla , Popescu Alina Iolanda
Published: October 2023

In the exploration and mining industry, fixed and mobile machines use hydraulic drive systems (HDSs) involving hydraulic cylinders powered at high pressure rates. Such cylinders operate in heavy and high-magnitude dynamic load regimes, e.g., as part of mobile crusher buckets, excavators and mini excavators, hook-lift trailers, or mobile hydraulic jacks. In this context, there are two solutions for generating high pressure rates in HDSs: (1) by using high-pressure pumps, or (2) by using hydraulic power units consisting of low-pressure pumping units and oscillating hydraulic pressure intensifiers. The second solution is often used in static applications, such as burst tests of pipes and tanks, and dynamic applications involving short displacements of hydraulic cylinders, such as in hydraulic tools and presses. This solution proves to be more efficient in terms of energy and economically.
To assess the efficiency of this type of hydraulic drive in the field of exploration and mining, the authors developed a test stand. The stand made it possible for the highpressure hydraulic cylinder to be loaded with heavy and high-magnitude dynamic loads, using a step ramp-like configuration with different slopes for the two displacement directions. Next, the cylinder was supplied from a low-pressure pumping unit equipped with a minibooster, and tested under these load conditions. Test results pointed out that the tested hydraulic cylinder moves continuously and safely over the entire forwardand- return stroke. Low-pressure pumping units equipped with miniboosters are an efficient solution for driving hydraulic cylinders in the field of exploration and mining, especially in the case of heavy and high-magnitude dynamic loads.
TECHNICAL SOLUTIONS AND RESULTS OBTAINED IN THE DEMOLITION BY BLASTING WORKS OF TALL STRUCTURES LOCATED IN VERY CONGESTED AREAS
Authors: Ilici Stefan , Laszlo Robert , Miron Claudia , Nicola Aurelian , Levente Miklos
Published: October 2023

The article outlines the practical steps and security requirements for carrying out the destruction of an industrial chimney on a platform housing an oil refinery that is close to critical structures and equipment. The chimney is 150 meters tall and is built out of an interior chimney composed of refractory brick masonry and an exterior tubular structure of reinforced concrete. A risk assessment was conducted with reference to seismic wave, air shock wave, noise, dust, and the amount of shock produced by the contact of chimney building with the soil to determine the potential secondary impacts caused by the blasting operations. Due to protection and safety measures, the demolition project was successfully completed, and no unanticipated incidents were noted. Additionally, the observed seismic wave values caused by the chimney's collision with the ground were not harmful because they were lower than the values predicted in the risk assessment.
THE PERFORMANCE OF EXCAVATORS IN THE OVERBURDEN OF SOUTH-WEST SIBOVC FIELD IN KOSOVO
Authors: Uka Ujmir , Zeqiri Kemajl , Dambov Risto
Published: October 2023

Kosovo has significant reserves of coal, where their exploitation began in 1922, coal is a mixture of organic mineral material produced by a natural process of growth and decay, or an accumulation of debris both vegetal and mineral with some sorting and stratification. Based on the geological map, the Kosovo Basin is mainly a tectonic area filled with tertiary sediments. Old rocks represent the Basin area, in the west Paleozoic age and in the east by Upper Cretaceous sediments. In the Coal Basin of Kosovo, along with Tertiary sediments, Quaternary sediments that have a hydrogeological character are developed.
Currently coal is dug in the field of the new mine known as South-West Sibovc, which includes reserves of 123.4 million tons.
The first stage for the exploitation of coal mines is the removal of the overburden, so through the evaluation of the performance of the excavators, productivity can be improved, costs reduced and safety increased in the workplace. The evaluation of the excavators performance was carried out through the analysis of the reports for years 2019, 2020 and 2021, from which it appears that there was not a good utilization of the capacity of the five excavators that were analyzed: 2xSchRs 650, 2xSRs 1300.24 and SRs 470, based on reports the productivity for excavator SchRs 650 is between 74.5% to 113.1%, for excavator SRs 1300 is between 62.86% to 96.39% and for excavator SRs 470 is between 49.84% to 73.95%, but load coefficient is between 18% �38%. The normal utilization of the load factor for these excavators is from 45%�60%.
Good productivity analysis can identify areas that need improvement, and through improving the processes and work arrangements of excavators can lead to increased mine performance, reducing costs and increasing revenues.