bluuebunny/crossref_metadata_2025 huggingface dataset:
Traffic image haze removal based on optimized retinex model and dark channel prior
Authors: Ni Chenmin , Fam Pei Shan , Marsani Muhammad Fadhil
Published: August 2022

GPS monitoring systems and the development of driverless vehicles are almost inseparable from camera images. The images taken by traffic cameras often contain certain sky areas and noise, the traditional dark channel prior (DCP) algorithm easily produces color distortion and halo effect, when processing the hazy traffic images with sky and high brightness areas. An optimized Retinex model and dark channel prior algorithm (ORDCP) is proposed in this paper. Firstly by adjusting the calculation method of dark channel image, the proportion of dark channel is improved; Then, the transmittance image is corrected and smoothed by guided filtering and mean filtering. Finally, the Retinex model is fused to save the details.ORDCP corrects the inaccurate calculation of scene transmittance value in DCP algorithm,and modifies some dehazing problems, such as the loss of details, halo effect, contrast and color distortion,etc. Using information entropy (IE) as the objective evaluation index, combined with the subjective evaluation, it is concluded that the algorithm proposed in this paper can effectively retain the detailed information of the image, and eliminate the halo effect. Meanwhile, it meets the visual characteristics of human eyes better, and has some practicality and applicability in traffic control and intelligent detection.
Methodology for building material suppliers selection based on the intuitionistic fuzzy multiple attribute decision making method
Authors: Xu Xinrui , Deng Dexue
Published: August 2022

The selection of suppliers is an important part of the construction of engineering projects in supply chain management. If the partners in the supply chain are reliable enough, they can promote the continuous progress of the supply and demand sides in the cooperation, thereby achieving a win-win situation, which is conducive to the realization of a virtuous cycle process. Material suppliers provide the required products and raw materials for the production and construction of enterprises. They are an important source of construction projects and occupy a very important position in the development of enterprises. The supply of high-quality products can lay a good foundation for the subsequent production and construction of the project, thereby promoting the smooth completion of the entire project. Therefore, rational evaluation and selection of suppliers has very important practical significance. The selection and application of building material suppliers is a classic multiple attribute decision making (MADM). In this paper, we introduced some calculating laws on intuitionistic fuzzy sets (IFSs), Hamacher sum and Hamacher product and further propose the induced intuitionistic fuzzy Hamacher power ordered weighted geometric (I-IFHPOWG) operator. Meanwhile, we also study some ideal properties of built operator. Then, we apply the I-IFHPOWG operator to deal with the multiple attribute decision making (MADM) problems under IFSs. Finally, an example for physical health literacy evaluation of College students is used to test this new approach.
Efficient feature based video retrieval and indexing using pattern change with invariance algorithm
Authors: Namala Vasu , Karuppusamy S. Anbu
Published: August 2022

The amount of audio visual content kept in networked repositories has increased dramatically in recent years. Many video hosting websites exist, such as YouTube, Metacafe, and Google Video. Currently, indexing and categorising these videos is a time-consuming task. The system either asks the user to provide tags for the videos they submit, or manual labelling is used. The aim of this research is to develop a classifier that can accurately identify videos. Every video has content that is either visual, audio, or text. Researchers categorised the videos based on any of these three variables. With the Pattern Change with Size Invariance (PCSI) algorithm, this study provides a hybrid model that takes into account all three components of the video: audio, visual, and textual content. This study tries to classify videos into broad categories such as education, sports, movies, and amateur videos. Key feature extraction and pattern matching would be used to accomplish this. A fuzzy logic and ranking system would be used to assign the tag to the video. The proposed system is tested only on a virtual device in addition a legitimate distributed cluster for the aim of reviewing real-time performance, especially once the amount and duration of films are considerable. The efficiency of video retrieval is measured with metrics like accuracy, precision, and recall is over 99% success.
Is self-image, in reference to the gravitational vertical, altered in adolescent idiopathic scoliosis? A multicenter, single-blind, case-control study
Authors: Catanzariti Jean-François , Darchicourt Delphine , Chevutschi Alain , Le Berre Morgane , Tanche Laetitia , Guyot Marc-Alexandre
Published: August 2022

PURPOSE: Adolescent idiopathic scoliosis (AIS) is associated with perturbation of orthostatic postural control. In humans, orthostatic postural control is organized around the gravitational vertical (GV). Perception of the GV involves a bottom-up process (central integration of multisensorial information) and a top-down process that uses cognitive mechanisms relying on body image. This study hypothesized that AIS would be associated with an erroneous central representation of verticality. The objective was to demonstrate an altered top-down process of sense of verticality in AIS. METHODS: This multicenter, single-blind, case-control study evaluated 63 adolescent girls with AIS divided into two groups (major AIS (n = 31) and minor AIS (n = 32)) and 30 matched non-scoliotic adolescents. Participants scored their perception of trunk appearance in an upright position using a pictographic scale. The outcome measure was the difference between perception score and real trunk deformity. RESULTS: Participants with major AIS presented with misperception of their trunk appearance in an upright position when compared with those with minor AIS or controls. CONCLUSION: Adolescents with major AIS underestimate their trunk deformity in an upright position. This suggests an altered representation of body image, affecting top-down control of sense of verticality.
Functional neurological symptom disorder: Preliminary findings of factors associated with walking ability post integrative pediatric rehabilitation
Authors: Barak Sharon , Silberg Tamar , Gerner Maya , Eisenstein Etzyona , Bardach Chen Arzoni , Yissar Tamar , Landa Jana
Published: August 2022

PURPOSE: The current study’s aims were to (1) examine long-distance walking ability (6-minute walking test [6MWT]) and walking hemodynamic responses (i.e., heart rate) among youth with functional neurological symptom disorder (FNSD) before and after an integrative pediatric rehabilitation (IPR) program; and (2) explore factors predicting improvement in walking ability. METHODS: Thirty-one youth with FNSD participating in an IPR program were recruited. The IPR program was activated biweekly in an ambulatory format. Study measures included the 6MWT, hemodynamic characteristics, rate of perceived exertion (RPE), pain-intensity perception, and Child’s Somatization Inventory-24 (CSI-24). All measures were conducted upon admission to the IPR and discharge. RESULTS: Findings indicated a significant increase in 6MWT distance, as well as decreases in heart rate, RPE, and pain-intensity perception from admission to discharge. At admission, CSI-24 and pain intensity predicted 6MWT distance (adjusted R2 = 0.68). Pain intensity predicted discharge 6MWT distance (adjusted R2 = 0.18). Initial 6MWT predicted changes in 6MWT distance from admission to discharge (adjusted R2 = 0.33). CONCLUSION: Using an integrative rehabilitation approach increases walking distance and decreases pain-related symptoms in youth with FNSD, emphasizing the need for collaboration between physical therapists and pediatric psychologists. Moreover, changes in walking ability may increase participation and thus should be the focus of IPR.
Social media and the practice of pediatric physical medicine and rehabilitation in the COVID-19 pandemic: A new era in patient-care
Authors: Haque Mahfujul , Khan Shahrin , Sandhu Amar , Armstrong Kelly
Published: August 2022

Social media represents a significant source of health information for the public, especially during the COVID-19 pandemic where gatherings are limited. It is important for pediatric physical medicine and rehabilitation physicians to understand how their patients use these platforms in order to educate the public and provide sound medical advice on social media. Given the lack of current guidelines on medical education through social media, the purpose of this paper is to provide an overview of various online social media platforms and describe how they can be utilized to enhance pediatric patient education. It is necessary to understand the different educational functions and limitations of the various social media platforms. This text provides a comprehensive overview of different social media platforms, their educational uses, limitations, and sample accounts. Relevant to the COVID-19 pandemic, social media can improve the efficiency of educational delivery and clinic workflow. Although social media is not meant to replace physician-patient relationships, it can be used as a surrogate for health information and improve— even start— physician-patient relationships. Despite the benefits of social media, pediatric physiatrists may be hesitant to utilize these platforms for several reasons. This text provides an overview of common barriers to social media usage by physicians and recommendations to overcome them. Given that the pandemic has led to increased social media usage, physicians should be aware of its implications on patient care and how they can be used to enhance the practice of pediatric physical medicine and rehabilitation. As social media usage by both patients and physicians grows, more research is needed to create recommendations on how pediatric physiatrists can best utilize social media to educate the public in an enjoyable manner while maintaining a professional image.
Depleting Time Itself: The Plight of Today’s “Human” Environment
Authors: Robinson Nicholas A.
Published: August 2022

Earth, and its human societies, are seized with the triple crises of climate change, biodiversity loss, and pervasive and escalating levels of pollution. In the 50 years since the 1972 UN Stockholm Conference on the Human Environment (UNCHE), States and UN Environment Program (UNEP) have created an entirely new body of international environmental law, and agreed on the UN Sustainable Development Goals for further socio-economic developments to help the 7.9 billion people on Earth today, and the 1.5 more billion expected soon. The article highlights the accomplishments of the past five decades, launched in Stockholm. However, beyond depleting the resources of Earth’s natural and physical environment, humanity has also depleted time itself. There is not enough time left to permit the pace of environmental law-making to lead to success. Political will has eroded too, leaving “business as usual” to continue to harm the environment. Fortunately, most nations have recognized the right to the environment, and the UN General Assembly is asked to do so in 2022. At the same time, courts around the world are increasingly enforcing environmental rights. If courts world-wide begin to enforce the right to the environment, pathways to attaining sustainable development can be developed beyond Stockholm+50 (2022).
On the Concept of Global Common Interest: Some Reflections
Authors: Aguila Yann , de Bellis Marie-Cécile
Published: August 2022

The emergence of the global public interest stems from a shift in the notion of sovereignty that goes beyond the interest of a State per se. It comprises inevitability of the assertion of sovereignty in a state-centric international legal and global order. As growing numbers of international legal instruments factor in and use different nomenclatures to indicate quest to go beyond the narrow confines of ‘sovereignty’ to cater to need for co-existence with other nations and peoples, it calls for sensitivities in our pursuit for something ‘common’ on the planet earth. This article seeks to examine and contextualize the quest for a global common interest in the emerging scenario of deepening of the global environmental challenges and the need to find legal and institutional mechanisms for our survival. Can we chisel the existing tools and prioritize the common interest at the global level? What will it entail?
Moving beyond State-Centrism in International Environmental Law
Authors: Hunter David
Published: August 2022

This article argues that our overly state-centric approach to international environmental law limits the law’s effectiveness in addressing the complex environmental challenges of the Anthropocene. The sources of international environmental law are designed for State-to-State disputes, even though such disputes are rare and do not reflect the nature of most global environmental challenges. The focus of international environmental law has been State responsibility, even though the primary actors of environmental deterioration are not States. Nor has international environmental law focused on individual rights, even though individuals and local communities disproportionately bear the burden of environmental decisions and have the strongest motivation to ensure action is taken. In the future, we should embrace a less State-centric approach to international environmental law—one that incorporates more directly the diversity of actors, contexts and legal norms that are currently involved in protecting the world’s environment. Such a reorientation could enable a rights-based approach that better reflects the realities of ecological limits and holds non-state beneficiaries of pollution and resource exploitation more directly accountable in a wider range of contexts.
Convergence in International Environmental and Natural Resources Law
Authors: McIntyre Owen
Published: August 2022

Despite the extraordinary proliferation of instruments of international environmental law since the 1972 UNCHE Conference in Stockholm, it appears that diverse forces are acting to maintain the internal coherence of this sub-field of international law, as well as its position firmly within the international law system. A range of institutions and processes ensure the continuing unitary nature of international environmental law within a unitary system of international law, notably including the universalist instincts of the International Court of Justice, the codification routinely undertaken by the International Law Commission, and the universal, pervasive and indivisible character of increasingly relevant human rights norms. These processes of “convergence” act to unify and enrich the fabric of the increasingly elaborate and sophisticated complex of rules, principles and institutional structures comprising international environmental law, while suggesting its growing developmental maturity after 50 years of frenetic evolution and supporting its continuing coherent elaboration.
Beyond Sustainability: Challenges for Environmental Law in the Era of Uncertainty
Authors: Jaria-Manzano Jordi
Published: August 2022

It is growingly accepted that the Planet has entered into a new geological era, the Anthropocene. Even if it is controversial to assess the changes in the Earth System brought by this geological transformation, it seems clear that the increasing exchange between society and its biophysical support gives as a result a global ecosocial network of astonishing complexity. Consequently, it has been concluded that the Anthropocene would be a more unstable geological period compared with the Holocene, with escalating plausibility of nonlinear disruptive events. International institutions and governments of states continue to produce environmental regulations, inspired in a constitutional framing of the global environmental crisis. This approach is largely based in the concept of sustainable development, which implies a negation of planetary change and ignores the growing uncertainty of planetary processes, according to the complexity of interactions of human agency and planetary evolution in the Anthropocene. The occurrence of nonlinear events is at odds with a political and legal vision which is essentially static, because of the confidence in some kind of technological fix of global environmental crisis. This paper is focused on the inability of sustainability to capture the implications of the narrative of planetary transformation, and explores the concept of resilience as alternative.
Envisioning Future of the Circular Economy: A Legal Perspective
Authors: Backes Chris , Boeve Marlon
Published: August 2022

The urgency of transitioning to a circular economy is by now widely recognized. Overexploitation of our earth has been convincingly evidenced globally. An optimal legal instrumentation is one of the prerequisites for fostering the transition to a circular economy. This article identifies and critically assesses recent developments of relevant legal tools and provides some ideas of what else could be needed for the pathway to a circular economy. Since the EU may be seen as a frontrunner in this area and is rapidly developing additional legal instruments to contribute to the transition, the EU is taken as a showcase. Besides EU law, the role of international law is discussed, as well as the question what individual states can do, within the boundaries of internal markets such as the EU. In short, there still is some room for improvement of EU law, especially concerning the establishment of concrete quantifiable general targets and the introduction of general legal principles of sustainable product design. On a global level, there is an urgent need to discuss and develop a legal framework for fostering the transition to a more circular economy.
Greening Trade Law for Global Climate Governance?
Authors: Ruppel Oliver C. , Dobers Cleo
Published: August 2022

Where do we stand, 50 years past the Stockholm Conference and almost 80 years past Bretton Woods? What is the role of international trade in the contemporary systems design that has emerged from these two historic events in the turn of times? Climate change is a global human and environmental challenge that calls for more coherent action to achieve shared climate goals in times of climate emergency. It is thus argued, that international trade must become more systemically integrated, greener and more sustainable for that matter. The focus lies on the World Trade Organization and its potentially bridge-building function between distinct legal and political fields, which have long been perceived irreconcilable, but which are by their very nature inherently connected.
Pembiayaan Pembiayaan Bank Syariah Untuk Mengembangkan UMKM
Authors: Muhsin Muhsin
Published: August 2022

ABSTRAK

Adanya pembiayaan dari Bank Syariah bertujuan membantu nasabah menghadapi masalah ekonomi, dengan menghidari riba dan berasaskan hukum syariah, bertujuan agar nasabah Bank Syariah dapat terlepas dari masalah perekonomian yang dihadapi.

Tujuan penelitian adalah untuk mengkaji secara mendalam persepsi nasabah terhadap produk pembiayaan dan dampak dari adanya pembiayaan BRI Syariah Kantor Cabang Jambi untuk mengembangkan UMKM.

Metode penelitian menjelaskan bahwa lokasi penelitian pada BRI Syariah Kantor Cabang Jambi dan di rumah masing-masing subyek. Pendekatan penelitian Kualitatif dengan jenis penelitian fenomenologi, yaitu pengalaman subyektif atau pengalaman fenomenologikal; atau suatu studi tentang kesadaran dari perspektif pokok dari seseorang. Peneliti dengan pendekatan fenomenologis berusaha memahami makna dari suatu peristiwa dan saling pengaruhnya dengan manusia dalam situasi tertentu.

Hasil penelitian menunjukan bahwa dari persespi nasabah mengungkapkan kepuasan terhadap pembiayaan yang sudah dilakukan di BRI Syariah Kantor Cabang Jambi baik dari aturan, sistem, pelayanan ataupun angsuran yang harus dibayar. Dampak dari adanya pembiayaan dari BRI Syariah Kantor Cabang Jambi terhadap perkembangan UMKM adalah bertambahnya modal yang digunakan untuk menambah stock barang yang akan dijual, memperluas dan memperbaiki tempat usaha, menambah alat penunjang usaha, perkembangan tersebut memberi dampak dengan keuntungan yang meningkat.

Kata Kunci : Pembiayaan, Bank Syariah, UMKM
Identification of Canine Parvovirus Antigenic Types Circulating in the Mexican Cat Population
Authors: Martinez Simon , G. Bautista Gómez Linda
Published: August 2022

_OBJECTIVES._ This study was aimed to investigate if canine parvovirus is infecting domestic cat populations in Mexico and determine the presence of different antigenic types of this virus affecting both healthy cats and cats with gastroenteritis.

_METHODS._ Seventy-five cats were studied, 25 with gastroenteritis and 50 healthy, viral DNA was extracted, a stool sample from each cat was obtained using rectal swabs, 100 ng of DNA from each sample were used for the PCR reaction, cats positive for CPV-2 were identified utilizing this method, only samples of positive animals were amplified to obtain a complete sequence of VP2 gen and identified an antigenic type of CPV-2 infecting the cats.

_RESULTS._ 60% of the cats with gastroenteritis and 22% of healthy cats were positive for Canine parvovirus; the variant 2c only was identified in healthy cats, while ten cats with gastroenteritis were infected by canine parvovirus 2a and type 2c. 

_CONCLUSIONS AND RELEVANCE._ This is the first report about variants of CPV-2 circulating in Mexican cats healthy and with gastroenteritis. The identification of canine parvovirus infection in cats is important because infected cats may contribute to the transmission of the disease to cats and dogs populations.
Perbandingan Efektivitas Sistem Pembelajaran Luring dan Daring Menggunakan Metode Use case dan Sequence Diagram
Authors: Rohmanto Ricky , Setiawan Topan
Published: August 2022

Ma’soem University is a formal educational institution that has implemented an offline and online learning system. This study aims to assess the effectiveness of the two learning systems globally and determine which learning system is more suitable to be applied to students and propose improvements to the learning system that is considered less effective. The research method used is a survey in which respondents are asked eight questions related to both learning systems, the technique of analysis and data processing is done by using descriptive statistics, meanwhile the proposed system improvement is visualized using use case diagrams and sequence diagrams. Based on the research results, the respondents stated that the offline learning system was considered more effective with a percentage of 64,99%, compared to online learning system with a percentage of 31,52%, so it is proposed to improve the online learning system by building an e-learning system.
A corretora de imóveis brasileira: evolução, história e os desafios do século XXI
Authors: Souza Neide Liamar Rabelo de
Published: August 2022

A atividade de Corretor de Imóveis tem registro durante o Império Romano, no Brasil desde a colonização portuguesa, com impulso após a estruturação urbana do país. Um segmento econômico que é regido pela lei da oferta e demanda, ficando evidente com a chegada da Família Real Portuguesa ao Rio de Janeiro, em 1808. Porém, a organização da profissão veio com a Lei 4.116, de 27/8/1962, que foi considerada inconstitucional, a norma vigente é a Lei 6.530, de 12/5/1978. Até 1958, essa atividade só podia ser exercida por homens, conforme o artigo 37 do Código Comercial Brasileiro (Lei 556/1850). A questão a ser avaliada é a atuação feminina na corretagem de imóveis, tendo como objetivo geral realizar um retrospecto sobre a atuação profissional da corretora de imóveis no Brasil e sua representatividade no mercado de trabalho no século XXI. A abordagem metodológica foi o método misto ou quali-quantitativo, com pesquisa documental e revisão bibliográfica sobre o estado da arte da atividade feminina na corretagem de imóveis. Os resultados demonstraram que a participação delas na profissão está em torno de 31%, mas de forma ascendente, até mesmo pelo fator histórico que não era uma laboração apropriada para mulheres; o registro da primeira corretora é de 1976. Como merece registro que elas estão recebendo maior remuneração do que os homens, trata-se de uma atividade que apresenta perfil para a atuação dos profissionais autônomos e a retribuição é por meio de comissão pelo trabalho realizado. As características marcantes da atuação feminina na corretagem de imóveis são de persistência e empenho para que seus clientes realizem um excelente negócio.
Autoridade, autoritarismo, política, poder, liberdade e violência no Instituto de Filosofia e Teologia (IFT): uma análise através de Hannah Arendt e Norberto Bobbio
Authors: Paula Sérgio Peres de
Published: August 2022

Através de uma discussão de alguns conceitos como “Autoridade”, “Autoritarismo”, Política, Poder, Liberdade e Violência, a partir de Hannah Arendt e Norberto Bobbio, é feita uma abordagem sobre o Instituto de Filosofia e Teologia (IFT), que existiu em São Paulo, Brasil. Instituição Inter congregacional, que surgiu como proposta de adequar a formação sacerdotal às novidades do Concílio Vaticano II, em 1965, dentro de um contexto de polêmicas e contestações políticas externas e internas à Igreja Católica, o IFT foi extinto em 1969. A forma como H. Arendt e N. Bobbio abordam os conceitos de Autoridade e seus correlatos ajuda a entender melhor os fatos.
Consequências da pandemia da COVID-19 na saúde mental
Authors: Silva Natália Matos da
Published: August 2022

Com a rápida disseminação da COVID-19, várias medidas preventivas foram acionadas pelo mundo, a fim de controlar o avanço do novo coronavírus. Dentre elas, destaca-se o distanciamento social provocado pela pandemia da COVID-19 que impactou a saúde mental dos indivíduos em razão do surgimento do estado de pânico em nível mundial e do desencadeamento de sentimentos como medo, insegurança e angústia. Assim sendo, este estudo buscou responder a seguinte questão norteadora: quais foram as consequências da pandemia da COVID-19 na saúde mental das pessoas? Diante disso, teve-se como objetivo principal analisar os impactos causados na saúde mental da sociedade mediante a pandemia da COVID-19. Logo, baseado na pesquisa bibliográfica e documental, foi possível observar um crescimento nos sintomas dos transtornos de humor, principalmente depressão e ansiedade, além de estresse agudo, pós-traumático e episódios de pânico em toda população. Nessa perspectiva, pesquisas recentes indicaram a necessidade de monitorar os impactos da pandemia na saúde mental, bem como implementar programas de prevenção e controle de crises e quadros relevantes de transtornos de comportamento e mental, tendo em vista o tempo de confinamento social, as pressões para sustentar a economia, o medo da contaminação e a necessidade de retornar ao trabalho.
PENGELOLAAN SAMPAH DARI BANK SAMPAH DI DESA ADAT CEMENGGAON DENGAN PROGRAM â€œPESAN-PEDEâ€ YANG DIURAIKAN MENJADI â€œPENGELOLAAN SAMPAH MANDIRI PEDESAANâ€
Authors: Dedi Diana I Komang , Arissusila I Wayan
Published: August 2022

Waste management from a waste bank in Cemenggaon Traditional Village with the "PESAN-PEDE" program which is described as "Independent Rural Waste Management". This work program is carried out on Sunday, September 13 2020 at 5.00 - Finish at the Cemenggaon Traditional Village Waste Bank. The service was carried out through a qualitative descriptive approach. This approach is expected to produce descriptive data in order to reveal the causes and processes of occurrence. Community service is carried out in Cemenggaon Traditional Village, Celuk Village, Sukawati District, by carrying out waste bank activities with the â€œPESAN PEDEâ€ program, which is described as 'Independent Rural Waste Management', independent means that management is carried out at sources of waste and rural means that it is carried out by rural / customary communities, especially in handling household organic waste
Penyusunan Enterprise Arsitektur SPBE Pada Badan Perencanaan Pembangunan Daerah Dalam Program Perencanaan Pengembangan dan Evaluasi Pembangunan Daerah Provinsi Jawa Barat
Authors: Angelina Tiofenny , Fajrillah Asti Amalia Nur , Hanafi Ridha
Published: August 2022

Kemajuan teknologi informasi, dalam bentuknya yang sekarang, terkait erat dengan masyarakat modern, dan pemerintah sebagai penyedia layanan untuk menjalankan misi pemerintah secara lebih terbuka, efektif dan efisien, serta untuk memfasilitasi akses. tujuan yang akan dicapai dari penelitian ini adalah menghasilkan rancangan blueprint Arsitektur Pemerintahan Berbasis Elektronik Pemerintah Provinsi Jawa Barat pada domain Proses Bisnis, Data dan Informasi, Aplikasi SPBE, dan Layanan SPBE (Tidak termasuk Infrastruktur SPBE dan Keamanan SPBE).Pada penelitian ini memeiliki sasaran ‘Terwujudnya inovasi tata kelola pemerintahan yang smart, bersih dan akuntabel’. Dengan model konseptual untuk mempermudah peneliti ddalam menjelaskan konsep proses penelitian dari awal penelitian sampai akhir penelitian.
Kata Kunci: Teknologi Informasi; Governance, SPBE
Current status and prospects of the development of hydrogen energy
Authors: Bondarenko V , Kovalevska I , Malashkevych D , Sushkova V
Published: August 2022

Purpose. Analysis of problems and prospects for the development of methods of hydrogen extraction, review of literature and study of methods of its transportation and use of hydrogen fuel in Ukraine and the world. Methodology. To achieve the goal, the work uses an empirical method of scientific research, taking into account theoretical provisions. Findigs. Expanded and systematized methods of obtaining hydrogen using various technologies (such as extraction of green hydrogen from excess electricity from renewable sources, gasification of coking coal at high temperature, electrolysis), which allowed to create a laboratory installation, the starting material of which is distillate from mine water, for obtaining hydrogen by electrolysis. Originality. consists in the analysis and systematization of energy and environmental aspects of the use of hydrogen fuel based on general information about hydrogen energy in Ukraine and the world. The regularities of the impact of various methods of obtaining hydrogen on the environment have been established. Although hydrogen is considered ecologically clean, in the future it is necessary to consider such a problem as the strengthening of the global greenhouse effect as a result of anthropogenic activity during the mass production and use of hydrogen and the impact of this activity on the protection of the Earth's ozone layer. Practical implication. The expediency of the transition to hydrogen energy with the production of green hydrogen by electrolysis has been confirmed. Ukraine has a high potential in the field of production of ecologically clean green hydrogen using innovative technologies. The advantage of molecular hydrogen as a synthetic fuel is its high energy density, where hydrogen exceeds natural gas by 2.6 times, oil by 3.3 times, and cellulose by 8.3 times. The topical issue of the use of wind, solar and other types of energy has led to an increase in the share of alternative sources since 2007. By 2020 According to the Ministry of Energy and international partners, the potential of production and use of "green hydrogen" is a universal tool for decarbonization. The European Commission has developed a holistic strategy to support hydrogen, placing it at the heart of the EU Green Deal. Hydrogen is produced using electricity produced from renewable sources, which currently accounts for about 1% of its total production.
Numerical simulation of the line of least resistanceduring the explosion of charges
Authors: Kononenko M , Khomenko O , Kosenko A
Published: August 2022

Purpose. To establish the analytical regularity of the calculation of the maximum value of the line of least resistance (LLR) of the explosive (E), taking into account the physical and mechanical properties of the rock mass and the detonation characteristics of the explosive. The methodology of research. Numerical modeling by the finite element method (FEM) to change the stress-strain state of the model established the value of the LLR at different diameters of the charge cavity, the pressure of explosion products and the tensile strength of rocks. Regression analysis obtained an empirical pattern of changes in the LLR depending on the physical and mechanical properties of the rock mass and the detonation characteristics of explosives. Mathematical modeling establishes analytical regularities of LLR calculation for zones of crack formation and intensive fragmentation. Findings. According to the change in the stress state of the model material around the charging cavity, the empirical regularity of changing the maximum value of the LLR depending on the diameter of the charging cavity and the diameter of the explosive charge, the density and rate of detonation of explosives, the compressive and shear strength. According to the developed calculation scheme, analytical regularities of LLR calculation for zones of crack formation and intensive fragmentation are obtained. By comparing the results of LLR calculation according to the obtained regularities, the most correct formula for LLR calculation was chosen, which turned out to be the analytical regularity of LLR calculation for the zone of intensive fragmentation. The originality. The power law is established for determining the LLR of an E, which comprehensively takes into account the radius of the crush zone, the diameter of the charging cavity and charge, the density and detonation velocity of E, the compressive strength of rocks, their fracturing and compaction under the action of rock pressure, which makes it possible to calculate the parameters of drilling and blasting (D&B) for breaking massif along the zone of intensive fragmentation. Practical implications. According to the results of the research, an analytical regularity of the calculation of the LLR of the explosive charge in the zone of intensive fragmentation was obtained, the use of which will allow to rationalize the D&B parameters in ore mining with the help of industrial explosives.
Determining the direction of the mining face direction during development of ravines pit surface
Authors: Sobko B , Lozhnikov O
Published: August 2022

Purpose. Establish an effective direction of the mining front direction in the beams locations at the development of a placer mineral deposit. Research methodology. The analytical method of research was used at the development of a method for determining the time of mining a pit section with a crossed beam surface when applying schemes with longitudinal and transverse movement of the mining front. The graphical method was used to analyze the established dependences of the maximum allowable cutwidth into the rock mass on the length of the open pit when determining the effective scope of the scheme with the longitudinal direction of the mining front at the development of placer deposits. The results. Schemes for mining a pit section with a cross-beam surface have been developed, providing for the longitudinal and transverse direction of the mining front, which make it possible to determine the main parameters of the mining system elements and establish the term of pit life. Efficient parameters have been established for the use of the transverse and longitudinal directions of mining faces movement when a pitsection with rugged terrain, which makes it possible to reduce the labor intensity of the process by 150–220 machine-shifts of an excavator at the pit field length of 300 to 900 m. Scientific novelty. The influence of the open pit length on the maximum allowable cut width into the rock mass during the longitudinal movement of the mining front is determined. The results of the research allow to establish that with an increase in the open pit length from 300 to 900 m, the maximum allowable width of the cut into the rock mass during the longitudinal movement of the front increases from 140 to 740 m. Practical value. A method for determining the time of mining a pit section with a crossed beam surface when using schemes with longitudinal and transverse movement of the mining front has been developed. The use of the proposed method makes it possible to determine the effective direction of mining front movement, depending on the parameters of the development system pit elements.
Comprehensive assessment the conditionsof Ladyzhynska TPP hydrotechnical constructions inaccordancewith theirreconstruction
Authors: Tymoshchuk V , Sherstiuk Y
Published: August 2022

Purpose. The purpose of study is a predictive assessment of stress-strain state of the "DTEK Ladyzhynska TPP" ash dump and changes in the hydrodynamic and hydrogeochemical modes within its location area in conditions of the designed reconstruction. The methodology. Comprehensive assessment of changes in hydrodynamic and hydrogeochemical modes around the ash dump site and defining the hydrogeomechanical stability of enclosing dams is performed based on the results of numerical modeling of groundwater flow and transport, and stress-strain state using the MODFLOW, PHASE2, and GEOSTUDIO software. Findings. The forecast of changes in hydrodynamic and hydrogeochemical modes around the ash dump site in accordance with the accepted ash dump reconstruction scheme is carried out based on the identified regularities of their formation. An assessment of the hydrogeomechanical stability of the enclosing dams in conditions of designed building up the third storey of the ash dump was performed based on the results of numerical simulation of the stress-strain state. Measures to increase the stability of the ash dump's enclosing dams under reconstruction are justified. The originality. New data were obtained regarding the nature of changes in hydrodynamic and hydrogeochemical modes around the ash dump under the conditions of its reconstruction. Measures to ensure stability of the hydrotechnical construction are substantiated in consequence of a comprehensive study of the stress-strain state of the material making up the enclosing dams, considering the predicted moisturizing of dam massif and the seismicity of the territory. Practical implications. The results of the performed research form the basis for substantiating technical decisions regarding ensuring the stability of hydrotechnical constructions of energy-generating enterprises.
Reduction of batches of large quantities of amber
Authors: Baranov P , Slyvna O , Zhuk B
Published: August 2022

Purpose. To carry out a comprehensive analysis of the problems of forensic gemological examination arising from the study of industrial and semi-industrial batches of amber in raw materials weighing more than 100 kg for further study in the laboratory, to formulate appropriate recommendations. Method. The work uses general scientific research methods - empirical and theoretical (analysis, generalization, comparison, explanation). Part of the work is based on the results of previous studies. Results. It is shown that the proposed method for reducing large lots of amber makes it possible to create a representative (analytical) sample that maximally corresponds to the composition of the entire amber batch and repeats all its properties. The proposed guidelines use the classical approach to sample quartering, adapted to the legal environment in which the forensic scientist works. The аuthenticity and reliability of the methodology is confirmed by the convergence of the obtained analytical sample with the results of the study of the original batch of amber. The correlation coefficient of the Pearson calculation ensures the objectivity of the technique. The proposed method for reducing and obtaining representative samples is focused on obtaining objective results and, which is very important, ensures the invulnerability of an expert in his professional activities when conducting a gemological examination. Scientific novelty. The algorithm for reducing large lots of amber is based on a hierarchical model, including weighing and reconciling data with accompanying documents, determining the number of fractions in the ratio in the original samples, grouping samples according to the convergence of fractions, quartering as a process of forming a representative sample, determining the number of fractions, assessing the reliability of the results obtained . The proposed methodology in the future will expand and improve the scientific and methodological base of the Expert Services of the Ministry of Internal Affairs of Ukraine and other organizations of a related profile. Practical significance. The use of the considered method of forming a representative sample of amber from large lots weighing more than 100 kg will allow specialists to select the necessary set of methods and actions for this type of raw material and, thereby, ensure the maximum compliance of the analytical sample with the composition of the entire amber batch, fully repeating its qualitative properties.
Petrographic and chemical-technological characteristics coal seamsof the lower carbon,formation C12 of the kalmiusblock
Authors: Savchuk V , Prykhodchenko V , Dementieva Y , Prykhodchenko D
Published: August 2022

Purpose. To establish the petrographic and chemical-technological features of the coal seams of formation C12 of the Kalmius block. Method. General scientific and applied research methods were used to fulfill the tasks. With the help of petrographic methods, the macroscopic and microscopic characteristics of the composition of coal were studied in detail, and the degree of its recovery and metamorphism was determined. With the help of chemical and technological methods, a comprehensive description of the composition and quality of coal is provided. The use of modern methods of analysis and interpretation made it possible to provide a generalized characteristic of coal seams, to reveal the peculiarities of their composition and quality. Findings. For the first time, regional ("provincial") features of the composition and quality of the coal formation C12 for Lower Donbass were revealed. Their typical petrographic composition was determined on the Kalmius block square. It was established that the coal of formation C12 differs from coal of formation C13 both in terms of gross petrographic composition and maceral composition. In addition, they are characterized by different degrees of recovery. It is proved that in the stratigraphic section, from the layers of the lower world to the layers of the upper world, the number of maceral groups of inertinite and liptinite increases, and the groups of vitrinite decrease. Lateral regularities of changes in the composition and quality of coal are determined. It was established that, compared to coal formation C13, higher values of sulfur content, heat of combustion, thickness of the plastic layer, and the Rog index are characteristic of coal formation C12. The elemental composition of the coal seams formation C12 is characterized by higher values of carbon and hydrogen content and significantly lower values of the amount of oxygen. Changes in the petrographic composition of Lower Carboniferous coal were revealed. The originality. For the first time, changes in the typical petrographic composition of coal in the Lower Carboniferous stratigraphic section of Southern Donbas, which indicate different conditions of formation of peatlands, were established. Practical implementation. The regional ("provincial") features of the region's coal have been clarified, lateral and stratigraphic changes in its composition and quality indicators have been determined, the grade composition of coal according to the new current standard in Ukraine has been established, and the technological value of formation C12 coal has been calculated.
On the issue concerning improvement of a mud preparation technology at the expense of hydrodynamic cavitation
Authors: Kamyshatskyi O , Koroviaka Ye , Rastsvietaiev V , Yavorska V , Dmytruk O , Kaliuzhna T
Published: August 2022

Purpose is to improve the technology of drilling mud by applying hydrodynamic cavitation. Research methodology is represented by the theoretical and experimental studies of hydrodynamic cavitation, performed with the help of modern methods of analytical analysis and experimental studies, i.e. by using general principles of mathematical and physical modeling, methods of processing research results in EXCEL, SolidWorks for further analysis. Research results. Frequency of cavitation oscillations according to the parameters of a device for creating hydrodynamic cavitation has been calculated. The formula for determining the dispersion time of the washing liquid material by the frequency of cavitation oscillations has been theoretically substantiated and obtained. A process of moving drilling fluid in the device using the appropriate software in the SolidWorks package has been studied. The results of theoretical research have been confirmed by practical research and chosen as a basis for substantiation and development of the methods for preparing drilling fluids. Originality is represented by modeling and research of the process of hydrodynamic cavitation in a cavitation device using flow visualization using SolidWorks software. This approach helped substantiate and predict the pressure and flow velocity at each point of transition of the diameters of a cavitation dispersant. This, in turn, has made it possible to reduce hydraulic resistance and improve the device design to implement a technology of preparation of drilling fluids due to hydrodynamic cavitation. This approach has allowed substantiating and performing virtual experiments on the technology of preparation of drilling fluids; that has helped select rational design parameters of the cavitation disperser and save a lot of money and time on the production of bench samples of the device, including various design features. Practical implications. Basing on the results of both theoretical and experimental studies, the development of advanced technology for the preparation of stable drilling fluids be applying rational indicators of hydrodynamic cavitation has been substantiated and proposed.
Implementación de área de terapia para discapacidad infantil caso de estudio: Hospital Básico IESS de Chone
Authors: Cabrera-Zambrano María Daniela , Arteaga-García María Elizabeth
Published: August 2022

El presente estudio se enfocó en las personas con discapacidad, las cuales, en algunos casos no reciben la atención especial que ellos requieren y que se encuentran consagrados en la Constitución como un derecho, debiéndose proveer a las comunidades, centros de rehabilitación integral que ofrezcan el servicio y permitan a las familias ahorrar tiempo en movilización hacia otras ciudades, y también en el pago a centros particulares, específicamente se plantea la posibilidad de implementar un área para rehabilitación de discapacidad infantil en el Hospital Básico IESS de Chone, que permita con la ayuda de profesionales y el equipo necesario, la estimulación en los niños, desarrollando habilidades y destrezas e integrándolos a la sociedad. El enfoque investigativo combinó lo cuantitativo con lo cualitativo, se identificaron 209 infantes discapacitados en Chone, y se calculó el tamaño de la muestra en 158 para las encuestas permitiendo identificar varios aspectos como tipo y porcentaje de discapacidad y los tipos de asistencia que requieren, además se aplicaron entrevistas a profesionales de la salud, para conocer los requerimientos que necesita un centro para su implementación, también se realizó revisión bibliográfica. Se detectaron 119 encuestados con familiar infantil con discapacidad, el 67,23% reciben algún tipo de terapia de rehabilitación, y existe un 32,77% que no ha recibido terapia de manera continua, se analizó aplicando la fórmula de chi cuadrado, si existe una correlación entre la terapia recibida o no de los infantes y el grado de discapacidad, demostrando que si incide el nivel de terapia recibida.