bluuebunny/crossref_metadata_2025 huggingface dataset:
Solving the Problems of Aerology and Ecology of Quarries in the Conditions of Mutual Influence of the Atmosphere of Worked-out Spaces and the Territories Surrounding Them
Authors:   National University of Science and Technology MISiS, Kolikov K.S.
Published: February 2023

The article substantiates the statement that the atmosphere of quarries is inseparable from the atmosphere of the territories adjacent to them. The manifestation of this relationship is expressed in an increase in air pollution in the areas where quarries are located, and in air pollution of quarries from external sources (dumps, factories, plants, power plants, plots of land with no vegetation, etc.). Measures to reduce air pollution inside quarries simultaneously reduce the harmful impact of open-pit mining on the environment. The use of artificial ventilation without dust and gas suppression can lead to the release of the large number of hazards outside the quarry and will have a very negative impact on the characteristics of the atmosphere of the surrounding areas. Therefore, when choosing means to combat hazards, it is required to give preference to means that trap or suppress dust and neutralize gases in the places of their formation. The influence of the main factors and parameters of the development of open-pit mining on the sanitary and hygienic conditions in the quarry and adjacent territories is analyzed and substantiated. When assessing the influence of various factors on the atmosphere of quarries and the air environment of the surrounding space, it is required also to remember about external sources of pollution, which are either an integral part of the technological chain of mining operations (external dumps, roads, warehouses, etc.), or simply located near the quarries. Sometimes the influence of external sources alone leads to exceeding the maximum allowable concentration of dust in a quarry. The influence of the ventilation schemes of quarries on both the air exchange in the developed spaces and the atmosphere of the surrounding territories is also of interest. Recommendations are given that can be useful in the design of quarries, when, in particular, there are several options for technological solutions and the conditions of natural ventilation of the developed space may be decisive. The problems of open pit aerology and the protection of the air environment of the surrounding territories should be considered inextricably linked due to their close mutual influence. To reduce the level of air pollution, the necessary measures should be envisaged, involving the resources of both quarries and local governments. The study of the problems of protecting the atmosphere should not be limited to the issues of its pollution, but also cover other air-related problems of deterioration in the working and living conditions of all those living in the region.
Analysis of the Incident Pyramid to Assess the Expected Prevented Damage
Authors:   Gazprom Gaznadzor LLC, Lukyanchikov M.I. , Lesnykh V.V. ,   Gazprom Gaznadzor LLC,   RUDN University, Nemchin Yu.V. ,   Gazprom Gaznadzor LLC, Timofeeva T.B. ,   State University of Management
Published: February 2023

Energy systems are the key elements of critically important infrastructures, as they provide the required quality of life for the population, as well as create the required conditions for the reliable functioning of various sectors of the economy. One of the priority tasks is to ensure the safe functioning of such systems, while in recent years considerable attention is paid to proactive methods of ensuring safety. Within the framework of these methods, the main efforts are aimed at early identification of violations and deviations in the operation or maintenance of the facility. Construction and use of the pyramid of incidents is one of the areas of the implementation of a proactive approach. Currently, the incident pyramids are used as a convenient form of graphical interpretation of statistical data, as well as one of the tools for ensuring the safety of hazardous production facilities. The analysis of statistical data on incidents and detected violations at energy facilities is presented in the article. The performed analysis allowed to construct the corresponding pyramids of incidents for industrial and occupational safety, and also to reveal that the ratio between the levels of the pyramid significantly depends on the specific type of system or energy facility. The possibility is shown concerning the use of the pyramid of incidents to assess the direct and indirect expected prevented damage in case of elimination of the identified violations. The examples are given related to the assessment of the amount of prevented damage for the energy facilities, and the practice of using this index as one of the indicators of the efficiency of inspection control activities in the oil and gas industry is described.
Risk-Oriented Approach to the Defects in the Reinforced Concrete Products
Authors:   Moscow State University of Civil Engineering, Kornilova A.V. , Baulin A.V. ,   Moscow State University of Civil Engineering, Ermakov V.A. ,   Moscow State University of Civil Engineering
Published: February 2023

During the operation of buildings and structures for various purposes, there are cases of damage and collapse of structures, which reduces the personnel safety. An analysis of the destruction of load-bearing capacity building structures or the causes of accidents occurrence at the industrial facilities showed that the prerequisites were laid mainly at the stage of manufacturing structures or during the construction process. Experience of incoming inspection of the reinforced concrete products shows that structures often arrive at the construction site with deviations in concrete strength from the design class. Formally, such a design should be rejected, and a new one ordered instead. However, the bearing capacity of the reinforced concrete structure can be maintained. And the problem arises of determining the possibility of using reinforced concrete structures with various defects arriving at the construction site in conditions of limited logistical capabilities. The object of study was the construction of supports (prestressed reinforced concrete column with a metal head) for the equipment of open switchgears with a capacity of 110 kV. To solve the problem, a risk-oriented approach was applied. Since there are no requirements for the levels of acceptable risks in the design standards, the risks of all participants in the process of construction and operation of the object were assessed — the contractor, the customer, who in the task under consideration also performs the functions of the operating organization, the manufacturer of reinforced concrete products according to three criteria (Wald, Savage, Laplace) with two approaches — under conditions of uncertainty and multi-criteria, and under risk conditions (taking into account subjective probabilities). The concept of risk was interpreted as the product of the probability and consequences of the occurrence of adverse events. For none of the participants, none of the criteria indicated that the optimal strategy was «Return the rack to the manufacturer and obtain a defect-free rack». Therefore, the formal rejection of a reinforced concrete product with minor defects, provided that the bearing capacity is observed, is not optimal.
On the Issue of Occupational Safety in the Design of Underground Ore Mining Technology
Authors:   SRSPU(NPI), Golik V.I.
Published: February 2023

The article is devoted to the issue of optimizing the operating mode of a mining enterprise according to the criterion of improving the safety of miners in the development of an ore deposit by an underground method. The problems of mining production solved at the design stage of mining enterprises are designated as derivatives of the efficiency function depending on the performance of the system, the total costs of development and operation, the amount of damage due to unreliability, time, etc. It is shown that one of the methods for optimizing the design support of mining operations is the modeling of the main mining processes. The purpose of the study is formulated as detailing the concept of ensuring occupational safety when engaging in the production of substandard metal-containing mineral raw materials. It is noted that the underground mines are among the most complex objects for which it is advisable to use multi-variant design with step-by-step optimization of intermediate design solutions. The extraction of mineral raw materials is characterized by an increase in volumes and accumulation of aggressive processing waste with a dangerous impact on the environment. It is noted that technogenic deposits are formed without considering the subsequent use of tailings, for example, storage with the creation of geochemical barriers. A new area of metal leaching into a disintegrator was proposed, which allows to produce products from substandard raw materials with less energy consumption. The characteristic of innovations in mining is given. A mathematical model is recommended that allows considering the features of technologies taking into account the costs of ensuring the safety of employees. It is concluded that the optimization of mining production is characterized by the extraction of metals using technologies with a combined mechanochemical effect.
Mathematical Modeling and Fire Risk Management by Linear Interpolation
Authors:   AO «NTs VostNII», Fomin A.I. ,   KuzSTU, Besperstov D.A. ,   Kemerovo State University, Ugarova I.M. ,   Kemerovo State University
Published: February 2023

The relevance of the set task to minimize the socio-economic risks associated with fires is shown in the article. Particular attention is paid to ensuring the safety of people in case of fires. A brief description of fire risks and their minimum requirements is given. Additionally, the dynamics of evacuation of people in horizontal areas during a fire is described. Foreign experience on the issue under consideration is given. Also, the indicators of speed of evacuation and the intensity of movement of people are formed in accordance with the density of the human flow by the method of linear interpolation. Mathematical dependences are described concerning the density of human flows on the characteristics of premises, changes in the speed and intensity of the evacuation of people on the horizontal section. Mathematical dependencies are described by functions. At the same time, the article shows the need in developing the set issue in the future. The prospects for the development of scientifically based mathematical models describing the processes of evacuation of people in the event of fires at the facilities, regardless of their functional purpose, are considered. With further development, modeling is proposed. It is possible to develop such an express assessment on the proper provision of fire safety for people, based not on the mathematical calculations themselves, but on the tabular values that can be guided by the specialists who do not have special knowledge.
Experimental Investigation and Modeling of the Formation of Explosive Concentrations
Authors:   NRU MGSU, Komarov A.A. , Timokhin V.V. ,   State Fire Academy of EMERCOM of Russia
Published: February 2023

Excess pressure is the main indicator characterizing the magnitude of explosive loads during emergency gas explosions. The value of this parameter and the entire accident scenario as a whole directly depend on the concentration of gas entering the room. Any typical room is characterized by the presence of two processes: laminar and turbulent diffusion. The laminar diffusion coefficient depends on the main characteristics of the gas (pressure, temperature). The laminar diffusion coefficient depends on the main characteristics of the gas (pressure, temperature). The coefficient of turbulent diffusion is determined only by the turbulent structure of the considered medium. It is established that the incomplete vortex mixing of gas with air is sufficient for flame propagation. This indicates the importance of studying the process of turbulent diffusion from the point of view of the formation of explosive gas-air mixtures. The purpose of the study is the experimental and computational determination of the coefficient of methane turbulent diffusion. This characteristic is required to assess the state of the gas-air environment in the room. It can be used in the development of explosion prevention measures, for example, in the design of a ventilation system. The study of the process of formation of explosive concentrations was carried out on the basis of an experiment and subsequent comparison of its results with a calculation model. In the course of the studies, it was established that the coefficient of turbulent diffusion, due to which explosive mixtures are formed, exceeds the coefficient of molecular diffusion by two orders of magnitude or more and is at least 4∙10–3 m2/s. The applied mathematical model and calculation scheme adequately describe the course of the experiments. Determination of the turbulent diffusion coefficient will allow assessing the state of the gas-air environment in the room and determining the required measures to prevent a possible emergency explosion.
Senam Kaki Diabetes pada Penderita Diabetes Melitus Tipe 2 untuk Meningkatkan Nilai Ankle Brachial Indexs
Authors: Megawati Sri Wulan , Utami Restu , Jundiah Raden Siti
Published: February 2023

Diabetes adalah penyakit kronis yang dipengaruhi oleh berbagai aspek seperti gaya hidup seperti pola makan dan aktifitas fisik sehingga membutuhkan perawatan berkelanjutan. Penatalaksanaan yang tidak efektif dapat menyebabkan komplikasi seperti Penyakit Arteri Perifer. Pemeriksaan Ankle Brachial Index dapat digunakan untuk mengetahui kondisi pembuluh darah ekstremitas bawah. Salah satu upaya pencegahan terjadinya Penyakit Arteri Perifer yaitu dengan Senam Kaki Diabetes. Tujuan Penelitian ini adalah untuk mengetahui pengaruh senam kaki diabetes terhadap sirkulasi ke daerah kaki dengan menilai Ankle Brachial Index pada pasien Diabetes Melitus Tipe 2. Desain penelitian ini adalah pre eksperimen dengan rancanagn one-group pre test-post test. Pengambilan sampel menggunakan tehnik purposive sampling dengan jumlah 21 responden berdasarkan kriteria yang ditentukan. Analisis data univariat menggunakan distribusi frekuensi, sedangkan bivariat menggunakan Paired Sampel T-test. Hasil penelitian menunjukan bahwa sebelum diberikan senam kaki diabetes sebagian kecil (14.3%) responden memiliki nilai Ankle Brachial Index normal (0.9 -1.4 mmHg). Setelah diberikan senam kaki diabetes, sebagian besar (71,4%) responden memiliki nilai Ankle Brachial Index normal yaitu (0.9 – 1.4 mmHg). Hasil Uji Statistik Paired Sampel T-Test dengan tingkat kepercayaan 95% (α=0,05) menunjukan (p –value 0,001) artinya terdapat pengaruh senam kaki diabetes terhadap nilai Ankle Brachial Index pada pasien Diabetes Mellitus Tipe 2. Senam kaki diabetes dapat terus dilaksanakan untuk meningkatkan sirkulasi ke daerah kaki pada pasien Diabetes Mellitus Tipe 2.
Faktor faktor yang memengaruhi cyberbullying pada remaja: A Systematic review
Authors: Dewi Heni Aguspita , Suryani Suryani , Sriati Aat
Published: February 2023

Cyberbullying adalah bentuk intimidasi yang dilakukan melalui teknologi informasi dan komunikasi, terutama internet dan telepon seluler. Bagi remaja, penggunaan teknologi informasi dan komunikasi merupakan bagian dari kehidupan sehari-hari, sehingga remaja berpotensi untuk terlibat dalam cyberbullying. Banyak faktor yang bisa mendukung keterlibatan remaja dalam cyberbullying. Tujuan penelitian ini adalah untuk mereview berbagai faktor yang berhubungan dengan cyberbullying pada remaja. Metode penelitian : pencarian sistematik artikel penelitian terpublikasi dilakukan di tiga database yaitu ProQuest, PubMed dan Ebsco. Ketiga database dipilih dengan pertimbangan bahwa ketiganya merupakan database yang kredibel untuk memilih artikel berbahasa Inggris yang relevan dalam rentang tahun 2014-2019, dengan mengunakan kombinasi kata kunci : ‘factors’ AND ‘cyberbullying’ AND ‘Adolescents’ OR ‘Teenagers’ OR ‘young adults’. Kemudian didapatkan 489 artkel dan dipilih lima belas artikel untuk dianalisis. Hasil penelitian : didapatkan lima faktor yang mempengaruhi cyberbullying pada remaja yaitu faktor individu diantaranya pengalaman kekerasan, persepsi, gander, usia, kontrol psikologis, dan penggunaan zat adiktif. Faktor keluarga meliputi pola asuh, dukungan keluarga, dan stress orang tua. Faktor teman berupa dukungan. Faktor sekolah yaitu jenis sekolah. Faktor terakhir yaitu penggunaan internet berupa intensitas dan kompetensi media etis. Kesimpulannya : kelima faktor tersebut dapat memengaruhi keterlibatan remaja dalam cyberbullying baik sebagai pelaku maupun korban. Penelitian lanjut diharapkan dapat melakukan analisis faktor-faktor cyberbullying pada remaja sehingga diharapkan dapat mencegah dan dapat melakukan intervensi yang tepat untuk mengatasi masalah cyberbullying.
Work-Related Fatigue Among Inpatient Unit Nurses
Authors: Somantri Irman , Yuliati Mia , Winwood Peter , Adiningsih Dian
Published: February 2023

Nurse fatigue has been recognized as a threat to both nurse and patient safety. Comparing to other units, inpatient unit has lower nurse to patient ratio. Inpatient unit nurses also work in shift and experience shift rotation. Thus make them more vulnerable to experience fatigue. The purpose of this study was to describe work-related fatigue among inpatient unit nurses. A cross-sectional, descriptive design with cluster sampling technique was used to 93 staffs nurses in six wards. Work-related fatigue was measured using Occupational Fatigue Exhaustion Recovery (OFER) scale. The data were analyzed using descriptive statistics. A total of 93 nurses provided their personal information details and fully completed self-reported fatigue and recovery questionnaire. The mean (±SD) scores were 56.55 (±15.56), 42.83 (±19.46), and 51.07 (±16.98) for acute fatigue, chronic fatigue, and intershift recovery, respectively. Perinatology unit nurses had the highest acute and chronic fatigue and the lowest intershift recovery. Less experienced nurses experienced lower acute fatigue level which tends to increase progressively with increasing experience and accompanied by poorer recovery. Nursing administrators should consider individual factors while planning staff placement in order to optimize quality of care and meet the job demands in every different unit.
THE LEVEL OF COMPLIANCE OF HEALTHCARE WORKERS IN PERFORMING HAND HYGIENE: A LITERATURE REVIEW
Authors: Rahayu Selvia , Susilaningsih F Sri , Komariah Maria
Published: February 2023

Compliance level of healthcare workers in performing hand hygiene is a significant aspect of patient safety goals. However, it is still not optimal and is one of the critical problems of many hospitals globally, including in Indonesia. The non-optimal consequence of hand hygiene compliance is hospital-associated infections since hands are an intermediary medium for transmitting infection. This literature aims to determine the level of compliance of health workers in performing hand hygiene and find out several matters that can be done so that the health worker's compliance can be optimal or increased. Review of articles through several electronic databases including PubMed and ProQuest, with the keywords "Compliance", "Hand Hygiene", "Health Workers", and "Hospital". Inclusion criteria include articles published between 2005 and 2019, health worker respondents, English language, full text and observation, or interview data collection techniques. The literature search found 212 articles, and after manual review, ten articles were identified and assessed using the JBI form (Joanna Briggs Institute). The literature review findings suggest that, following the intervention, the level of compliance of health workers in performing hand hygiene is still lacking and growing. The conclusion is that more significant support from the hospital (e.g., role models, audits, adequate infrastructure, education and repeated training), the greater the compliance of health workers in performing hand hygiene.
Academic Burnout Among Undergraduates Nursing Students
Authors: Sumarni Tati , Mediawati Ati Surya , Yulianita Henny
Published: February 2023

Academic burnout is a condition when someone got fatigued continuously due to load gained during learning. Nursing students are a group which risk of experiencing academic burnout. Previous research has shown that nursing students experience mild to severe burnout. Even so, it has known that location will have different effects on burnout. This study aims to determine academic burnout in undergraduate students at the Faculty of Nursing, Universitas Padjadjaran. The design of the research used descriptive quantitative. The population was 910 nursing students. Proportional stratified random sampling used for chosen sample, so there were 278 samples collected. Data were collected using Maslach Burnout Inventory - Student Survei questionnaire. Process data results by univariate analysis. The result showed that all respondents (n=278) had academic burnout. A total of 25,2% respondents experienced the mild category, as many as 74,1% respondents experienced moderate academic burnout and 0,7% respondents experienced the severe category. Most of the students had moderate exhaustion (83,8%), more than half of the respondents had low cynicism (56,8%), and moderately reduce professional efficacy (70,1%). The nursing students had a moderate category of academic burnout. Therefore, it is recommended to monitor the level of academic burnout regularly and provide consultation facilities.
Balance Exercise Improves Muscle Strength And Body Stability In Frail Older People
Authors: Malasari Silvia , Sutriani Sutriani , Irwan Andi Masyitha
Published: February 2023

Background: Many elderly people in Indonesia experience falling every year and the half had fallen more than once. This falls due to loss of bone and muscle mass which results in poor of balance. This study aimed to show whether balance excercise could improve muscle strength and balance on elderly people with risk of falling. Methods: This was a quasi-experimental design with two-group pretest-posttest control group. The sample was taken by purposive sampling and the total of 27 elderly people was selected into 2 groups: intervention (n = 14) and control (n = 13). The intervention group received the balance exercise regularly 3 times a week for 3 weeks. The balance exercise consists of plantar flexion, knee flexion, hip flexion, hip extention, and single leg side. Results: As an independent t test showed a significant difference in the balance and muscle strength between the intervention and the control group. Paired t-test on balance values obtained (p = 0.003) and the muscular strength (p = 0.000) which means that there was effect of balance exercise on muscle strength and balance in elderly with risk of falling. Conclusions: Balance exercise for 3 weeks regularly could improve balance score and muscle strength on the older people. Therefore, elderly people escpecially who are at risk of falling better to do balance exercise as their routine and getting support for doing this from family and health workers.
The Relationship between Availability Basic Sanitation with Toddlers Stunting Incidence
Authors: Raihani Nara , Rahayuwati Laili , Yani Desy Indra , Rakhmawati Windy , Witdiawati Witdiawati
Published: February 2023

Poor basic sanitation was one of the indirect causes of stunting. Stunting was one of the toddler health problems which characterized by the child's height not according to his age. This study aims to analyze the relationship between the availability of basic sanitation facilities with stunting in toddlers incidence. This research was a correlational quantitative research with a cross-sectional approach. The total population in this study was 465 people in Sukamulya Village, Rancaekek District, Bandung Regency. Samples were taken by purposive sampling technique so that the sample used was 96, with the criteria of parents with toddlers. The instrument used was the RKDU questionnaire instrument originating from primary research which consisted of demographic data, questions related to the availability of latrines, questions related to waste management and questions related to SPAL. Data were analyzed using the chi- square statistical test. The results of statistical tests show that there was no relationship between the availability of basic sanitation facilities and the incidence of stunting in toddlers in Sukamulya Village (p value= 0,366). There are 22 respondents who still have poor sanitation facilities and 31 toddlers who still suffer from stunting. This needs to be give special attention from nurse to provide counseling interventions for sanitation facilities and stunting treatment.
Young Danish audiences and British screen content: A critical reflection on transnational consumption, geo-linguistic regions, and cultural proximity
Authors: Bengesser Cathrin , Esser Andrea , Steemers Jeanette
Published: February 2023

Drawing on survey and interview data from a pilot study undertaken online in Denmark (March–July 2020), this article provides exploratory insights about how young audiences in Denmark (aged 16–34, with a background in higher education) engage with British television and film as viewing shifts from broadcast television to online on-demand services. First, drawing on survey data, we concentrate on consumption habits and genre preferences regarding British content and compare it to Danish, Nordic, and American content. Second, drawing on interviews, we address the significance of cultural and particularly linguistic proximity in determining the consumption and reception of British content. Revealing that young Danes in the pilot study feel greater linguistic proximity to English than to other Scandinavian languages, the research suggests the need for more nuanced theorisations of cultural and linguistic proximity, along with the revision of cultural distance and geo-linguistic regions theory.
Review of automatic control tools for biological agent in the atmosphere above sea surface
Authors:   NPO Pribor JSC, St. Petersburg, Russia, Volchek A.O. , Mikhailenko V.S. ,   Kuznetsov Naval Academy, St. Petersburg, Russia, Malovik D.S. ,   Kuznetsov Naval Academy, St. Petersburg, Russia, Kicha E.I. ,   Sudpromkomplekt LLC, Moscow, Russia
Published: February 2023

Object and purpose of research. Methods of biological aerosol research and technical means for their implementation. Subject matter and methods. Analysis of technical documentation for used and prospective equipment. Main results. The main parameters of foreign and domestic bioaerosol analysis devices based on the flow-optical method. Conclusion. Based on the results obtained, it can be concluded that the development of methods for the analysis of bioaerosol particles in the near future will be determined by the development of new radiation sources for the effective excitation of particle fluorescence, as well as the creation of new techniques to determine the independent quantitative and qualitative parameters of the studied particles. A typical example is the creation of a highly efficient system that combines several approaches, including destructive laser spectroscopy, which was not previously used in the flow-optical method.
Aggressive environments and their implications for catalytic converters of marine diesels
Authors:   Polzunov Altay State Technical University, Barnaul, Russia, Gorlova N.N.
Published: February 2023

Object and purpose of research. This paper discusses porous permeable catalysts used in converters of marine engines. The purpose of this study was to investigate the effect of aggressive environments upon catalytic properties and parameters of the materials used for catalytic conversion. Subject matter and methods. The paper suggests a procedure for experimental studies intended to investigate the effects of aggressive environments in marine diesels contributing to gas-thermal corrosion. It also presents a test rig for investigation of hot gas flow effects upon corrosion properties of porous permeable catalytic materials. Main results. The study yielded the data on gas-thermal corrosion effects upon properties and parameters of porous permeable catalysts used in exhaust gas converters of marine power plants. Conclusion. The results of the study make it possible to estimate the extent of aggressive environment effects of exhaust gas conversion system upon the properties of its catalysts, as well as to adjust the chemistry of catalytic material in accordance with the requirements to conversion quality of exhaust gases.
Traduire Eugène Onéguine: deux approches
Authors: Bagyan Maria , Drobysheva Taisiia
Published: February 2023

Le présent article aborde plusieurs questions essentielles sur la traduction du roman en vers Eugène Onéguine d’Alexandre Pouchkine: faut-il garder le rythme ou la rime? Faut-il traduire mot à mot? Sommes-nous autorisés à modifier le texte et à ajouter des nouveautés ou quelque chose de complètement différent du texte original? La liberté d'interprétation est-elle autorisée? Toutes ces questions sont examinées dans l'article suivant en s’appuyant sur des exemples de Jean-Louis Backès et d’André Markowicz qui ont effectué deux traductions différentes du célèbre roman de Pouchkine. Les deux traductions seront analysées afin de comparer leurs techniques de l’art de traduire.
De l’apprenti locuteur au traducteur: les apports d’une formation à la réflexivité en langue étrangère
Authors: Ben Harrat Malika
Published: February 2023

La didactique des langues-cultures et la didactique de la traduction abordent le sujet de la traduction de manière différente. Cependant, en situant les compétences de compréhension et de traduction à travers un aperçu historique et comparatif de leur évolution au sein de la didactique des langues-cultures ainsi que dans les tests de certification en langues, je montrerai comment certaines compétences qui sous-tendent la capacité de traduire gagneraient à être repensées dans un cadre socioconstructiviste par ces deux traditions. Enfin, je présenterai l’étude de cas positionnelle pour l’appropriation des langues étrangères, un exercice de lecture et d’écriture qui stimule la réflexivité en prenant en compte les dimensions cognitives, sociales et affectives qui peuvent entrer en jeu lors de la réception écrite ou orale de l’information.
Leveraging graphical models to enhance in situ analyte identification via multiple voltammetric techniques
Authors: Fenton, Jr. Alexis , Brushett Fikile
Published: February 2023

Voltammetry is a powerful analytical technique for evaluating electrochemical reactions and holds particular promise for interrogating electrolyte solutions suitable for energy storage technologies, including examining features such as state-of-charge and state-of-health. However, individual voltammetry techniques are likely to be subcomponents of broader analytical workflows that incorporate complementary methods to diagnose evolving electrolyte solutions of uncertain composition. As such, we demonstrate that jointly evaluating electrolyte solutions with distinct voltammetric modes can enhance the capabilities and sensitivities of characterization protocols. Specifically, by considering both macroelectrode cyclic square wave and microelectrode cyclic voltammograms in sequential ("one after another") and simultaneous ("all at once") manners, the composition of an electrolyte solution may be estimated with greater accuracy, and analytes that exhibit near identical electrode potentials may be more readily differentiated. We additionally explore means of further improving this method, finding that protocol accuracy increases when multiple voltammetry techniques are included in the training dataset. We also observe that the algorithm typically becomes more confident--but not necessarily more accurate--when the number of data points increases. Overall, these studies show that the sequential and simultaneous methods may hold utility when evaluating multiple voltammetry datasets that, in turn, may be leveraged to streamline diagnostic workflows used to examine electrolyte solutions within electrochemical technologies.
Nickel-Catalyzed Direct Stereoselective Alpha-Allylation of Ketones with Non-conjugated Dienes
Authors: Cao Yi-Xuan , Wodrich Matthew , Cramer Nicolai
Published: February 2023

The development of efficient, sustainable methods for the construction of carbon-carbon bonds with the simultaneous stereoselective generation of vicinal stereogenic centers is a longstanding goal in organic chemistry. In this respect, the carbonyl group is a particularly relevant due to its ability reacting either as electrophile or pro-nucleophile at the alpha-carbon in its enolized form. The transition from precious metals to catalysts based on earth-abundant metals made impressive progress, and especially nickel became a powerful tool due to its low-cost and unique reactivity profiles. Low-valent nickel(0) complexes promote reductive couplings carbonyl compounds exploiting the electrophilic nature of the carbonyl group. In stark contrast, complementary alpha-functionalization of carbonyls leveraging its pro-nucleophilic character in conjunction with olefin acceptors are very scarce despite their attractivity. We report a Ni(0)NHC catalyst which promotes the conversion of ketones and non-conjugated dienes that are both cheap and widely accessible starting materials to synthetically highly valuable alpha-allylated products in excellent yields under mild conditions without any additional base or additive. The catalyst directly activates the alpha-hydrogen atom of the carbonyl substrates transferring it the olefin acceptor. The complete process is redox neutral and fully atom-economic. This feature contrasts typical carbonyl -functionalizations with precious metals that require functionalized substrates like a pre-formed enolate nucleophile and allyl electrophile. The transformation creates adjacent quaternary and tertiary stereogenic centers in a highly diastereoselective manner. Moreover, we introduce a chiral bulky designer NHC ligand allowing to conduct the reaction in an enantioselective manner providing the functionalized products with up to 99:1 er and >20:1 dr. Mechanistic and computational studies indicate an initial LLHT process from the ketone substrate to the olefin substrate to set the selectivity of the whole transformation. A beta-hydride elimination chain walking events is triggered until a favorable pi-allyl intermediate is reached leading by reductive elimination to the targeted products. The shown facile and selective functionalization of alpha-C-H bond of carbonyl groups by Ni(0)NHC catalysts opens new opportunities to exploit sustainable 3d-metal catalysis for a stereoselective access to valuable chiral building blocks.
An artificial intelligence's interpretation of complex high-resolution in situ transmission electron microscopy data
Authors: Wang Xingzhi , Yan Chang , Ondry Justin , Ercius Peter , Alivisatos Paul
Published: February 2023

In situ transmission electron microscopy (TEM) has enabled researchers to visualize complicated nano- and atomic-scale processes with sub-Angstrom spatial resolution and millisecond time resolution. These processes are often highly dynamical and can be time-consuming to analyze and interpret. Here, we report how variational autoencoders (VAEs), a deep learning algorithm, can provide an artificial intelligence’s interpretation of high-resolution in situ TEM data by condensing and deconvoluting complicated atomic-scale dynamics into a latent space with reduced dimensionality. In this work, we designed a VAEs model with high latent dimensions capable of deconvoluting information from complex high-resolution TEM data. We demonstrate how VAEs with high latent dimensions trained on atomically resolved TEM images of lead sulfide (PbS) nanocrystals is able to capture movements and perturbations of periodic lattices in both simulated and real in situ TEM data. The VAEs model shows capability of detecting and deconvoluting dynamical nanoscale physical processes, such as the rotation of crystal lattices and intraparticle ripening during the annealing of semiconductor nanocrystals. With the help of the VAEs model, we can identify an in situ observation that can serve as a direct experimental evidence of the existence of intraparticle ripening, a process so far has not been recorded under atomically-resolved in situ TEM for colloidal semiconductor nanocrystals. The VAEs model provides a potent tool for facilitating the analysis and interpretation of complex in situ TEM data as a part of an autonomous experimental workflow. It also shows potential to identify unexpected phenomena during the data analysis.
EVALUATION AND VALORIZATION OF GEOHERITAGE OF THE MOUNT ROGOZNA AREA (SERBIA)
Authors:   University of Belgrade, Faculty of Geography, Studentski trg 3/3, 11000, Belgrade, Serbia, PETROVIĆ Dragan , MILINČIĆ Miroljub ,   University of Belgrade, Faculty of Geography, Studentski trg 3/3, 11000, Belgrade, Serbia, VUKOIČIĆ Danijela ,   University of Priština in Kosovska Mitrovica, Faculty of Sciences and Mathematics, Lole Ribara 29, 38220 Kosovska Mitrovica, Serbia, RISTIĆ Dušan ,   University of Priština in Kosovska Mitrovica, Faculty of Sciences and Mathematics, Lole Ribara 29, 38220 Kosovska Mitrovica, Serbia, MILINČIĆ Uroš ,   University of Belgrade, Faculty of Geography, Studentski trg 3/3, 11000, Belgrade, Serbia, POTIĆ Ivan ,   Military Geographical Institute "General Stevan Bošković", Mije Kovačevića 5, Belgrade, Serbia
Published: February 2023

Due to its unique geology, relief, and extensive hydrologic network, Mount Rogozna has been chosen as a case study for the quantification of geodiversity. The study consists of two interconnected parts. The first part demonstrates the application of the geodiversity evaluation method using the geodiversity index, whereas the second part deals with the evaluation of the geoheritage objects of the studied area. The methodology for calculating geodiversity index that was applied in this research was modified due to the size of the studied area. The geodiversity index is calculated based on the number of abiotic elements and the roughness of the relief within the studied area. Mount Rogozna, with an area of 818.26 km2, has been studied and processed using a network of spatial polygons of 500 × 500 m and using different maps. The second part of the research deals with the evaluation of geoheritage objects, applying the Geosite Assess-ment Model. The obtained results demonstrate that geoheritage objects are not always located in places with high values of the geodiversity index. This is proven by the fact that 5 out of 7 geoheritage sites are located in areas with low geodiversity values. The obtained qualitative and quantitative data with maps showing the distribution of geodiversity can serve as a starting point for the development of a planning and management strategy, but also as the example of good practice for possible further application in the quan-tification of geodiversity in this part of Serbia, and beyond its borders as well.
Responsiveness In Crisis: Measuring New Zealand’s State-Diaspora Relationship During The Covid-19 Pandemic
Authors:   , Wood Simon
Published: February 2023

This thesis explores the political experiences of the New Zealand diaspora during the Covid-19 pandemic. Two questions are addressed. The first, is how does New Zealand’s current state-diaspora relationship fit within the wider global context of emergent state-diaspora strategies? The second is how the actions of the New Zealand government, informed by its existing diaspora practices, were received by non-resident New Zealanders during this crisis period? Wider theory on the malleable definition of the concept of diaspora is explored, with emphasis on political state-led diaspora strategies and an exploration ofgovernment claims to represent their diasporas. New Zealand’s history of diaspora representation is examined with the conclusion that a previous selectively strategic direction has reverted to one of disinterest. The thesis then presents the findings from an original survey of 1100 non-resident New Zealanders which measured their experiences ofrepresentation during the Covid-19 pandemic. The survey findings show that respondents found the relationship with the New Zealand government overwhelmingly non-responsive to their circumstances, particularly with regard to policy and symbolic components, which contributed to a wider collective disconnection between the diaspora and their home country.

This thesis is informed by the conviction that the study of state-diaspora relationships must include the experiences of migrant communities alongside the actions of governments in order to measure the impact and efficacy of representative claims.
Obtenção da indutância transitória de uma máquina síncrona utilizando o método dos elementos finitos
Authors:   Escola Politécnica da Universidade de São Paulo, Schimid Vitor Annecchini
Published: February 2023

O artigo objetiva a apresentação de um método computacional para a obtenção da indutância transitória de eixo direto (Ld’) de uma máquina síncrona com menor margem de erro possível. Este método se baseia na simulação do ensaio de resposta em frequência da máquina mediante a remoção de seus enrolamentos amortecedores. Com essa abordagem, foi possível obter o referido parâmetro com margem de erro abaixo de 2,65%. A maior contribuição deste trabalho está relacionada à fase de projeto da máquina síncrona, já que, com a utilização do método apresentado, sua indutância transitória de eixo direto (Ld’) pode ser determinada antes de sua construção. Dessa forma, caso o referido valor de indutância seja insatisfatório para as aplicações desejadas, o projeto pode ser modificado sem a necessidade de construções de protótipos ou testes de laboratório.
The Relationship between Perceived Organizational Support (POS) and Turnover Intention: The Mediating Role of Job Motivation, Affective and Normative Commitment
Authors: Sartori Riccardo , Ceschi Andrea , Zene Mattia , Scipioni Lorenzo , Monti Michele
Published: February 2023

Aim/Purpose: The study aims to examine the mediating role of job motivation and affective and normative commitment on the relationship between perceived organizational support (POS) and job turnover intention.

Background: POS refers to employees’ beliefs and perceptions concerning the extent to which the organization values their contributions, cares about their well-being, and fulfils their socio-emotional needs. To date, research has shown that employee turnover is a complex construct resulting from the interplay of both individual and organizational variables, such as motivation and climate.

Methodology: Cross-sectional data were collected from 143 employees of an Italian industrial company. Paper-and-pencil questionnaires were used to assess respondents’ POS, job motivation, affective and normative organizational commitment, and turnover intentions.

Contribution: Specifically, in this research, we aim at examining (i) the indirect effect of POS on turnover intention via (ii) job motivation and (iii) normative and affective commitment.

Findings: Results show that high POS is associated with high levels of job motivation and affective and normative commitment, which in turn are negatively linked to turnover intentions.

Recommendation for Researchers: Researchers should not lose sight of the importance of studying and delving into the concept of turnover intention given that, from an organizational point of view, losing personnel means losing competencies, which need to be replaced through assessment, selection, training, and development, processes that are often challenging and expensive.

Future Research: Future research should further investigate the role of motivation and commitment, other than additional variables, for POS and turnover intention. Longitudinal studies and further testing are required to verify the causal processes stemming from our model. Future research could consider linking employees’ self-reported measures with objective data concerning turnover rates.
A Causal Model of Relationship between Organizational Climate Influencing Happiness at Work and Organization Engagement
Authors: Sanamthong Ekkasit , Prabyai Suebpong
Published: February 2023

This research aimed to study the level of organizational climate, happiness at work, and organization engagement. It included research into the relationship between organizational climate and employee happiness and engagement, as well as the direct and indirect effects of organizational climate on employee happiness and engagement. A sample of 400 employees was used. The findings revealed the following: 1) Organizational Climate (OC) directly influencing Happiness at Work (HW) had an influence coefficient of 0.92 with a statistical significance level of 0.05. 2) Organizational Climate (OC) directly influencing Organization Engagement (OE) had the influence coefficient of 0.32 with the statistical significance at the level of 0.05 and indirectly influencing Organization Engagement (OE) through Happiness at Work (HW) had the influence coefficient of 0.59 with the statistical significance at the level of 0.05. 3) Happiness at Work (HW) directly influencing Organization Engagement (OE) had an influence coefficient of 0.64 with a statistical significance level of 0.05. 4) Organizational Climate (OC) could forecast 85 percent of Happiness at Work (HW). 5) Organizational Climate (OC) and Happiness at Work (HW) could jointly forecast 89 percent of Organization Engagement (OE). Doi: 10.28991/ESJ-2023-07-02-018 Full Text: PDF
MOSAIC DECORATION OF THE SAN VENANZIO CHAPEL IN THE LATERАN BAPTISTERY IN ROME
Authors:   Institute of Philosophy and Law of the Siberan Branch of the Russian Academy of Sciences, Lidova Maria A.
Published: February 2023

The present contribution is focused on analysis of the mosaic decoration in the chapel of St Venatius (San Venanzio), adjacent to the Lateran Baptistery in Rome. The rich cycle unfolding on the walls of the chapel combines several visual motifs. Particularly noteworthy is the representation in the apse that brings together the image of the orant Virgin and a group of saints, who form a row of figures. This row continues on the outer walls of the altar niche, with four saints on each side. The choice of these saints along with the general iconography of the chapel do not find direct parallels in other early medieval monuments. Therefore, it can be argued that the Roman decoration under discussion was inspired primarily by the wishes and personal agenda of Pope John IV (640–642), who commissioned this program and was depicted in the apse offering the building of the chapel. Besides studying the rendering of saints in this mosaic, the paper offers an insight into the visual trends and artistic expertise of craftsmen working at Rome in the first half of the seventh century.