bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigating the effectiveness of anterolateral distal tibia plate in treating distal tibial fractures in adults: a prospective study
Authors: Jain Mukul , Khichar Sukhveer , Sathiyaseelan Naveen , Jewliya Rajesh , Jain Harish Kumar
Published: April 2023

Background: “Pilon” fractures of the distal tibia are a term used usually by orthopaedic surgeons. High-energy trauma and related soft tissue injuries are the main causes. It might be challenging to treat distal one-third of tibial fractures that affect the articular process or not. The objective of this work is to analyze the result of the Anterolateral Distal Tibia Plate in distal tibial fracture treatment in adults.
Methods: After receiving permission from the ethical committee, this prospective interventional analysis was conducted among 25 patients who satisfied the inclusion standards and were given anterolateral distal tibia plates. The scoring system created by “Ovadia and Beals” was used to evaluate patients at the conclusion of the follow-up period.
Results: The participants in this research varied in age from 18 to 64, with a mean age of 36. 13 patients had a left tibia fracture and 12 patients had a right tibia distal end fracture. There were 4 open GA-I fractures and 21 closed GA-I fractures. 18 patients got fractures as a result of road traffic accidents (“high energy trauma”), and 7 patients sustained a fracture due to a fall (low energy trauma). The union of fracture occurred in 24(96%) patients and 1(4%) case showed delayed union. The average period of union was 18 weeks with the radiological signs of callus formation. 2 patients developed superficial and 1 patient developed deep infection.
Conclusions: Distal end tibial fractures especially with intra-articular involvement may be effectively treated by anterolateral plating within a single stage, offers advantages such as adequate fracture exposure, soft tissue preservation, and reliable fracture healing.
Assessing the factors that influence a recurrence of congenital talipes equinovarus in children treated with the Ponseti method
Authors: Goyal Rahul Kumar , Meena Manoj Kumar , Agarwal Mohit , Sathiyaseelan Naveen
Published: April 2023

Background: Congenital talipes equinovarus, also known as clubfoot, is one of the most common congenital malformations in pediatric orthopedics. With a checkered treatment history extending from Hippocrates' bandages to Kite's serial plaster cast application to surgical treatment, no single modality can claim to be a complete treatment.
Methods: In a combined prospective and retrospective study at the Department of Orthopaedics of St. Stephen's Hospital, 192 patients with 292 clubfeet who met the inclusion criteria and received ethics committee approval were included. The purpose of the research was to identify early recurrence characteristics, undertake the Pirani scoring, and identify additional clinical characteristics to evaluate recurrence predictors.
Results: In our study, out of 192 patients, 188 were successfully treated with the Ponseti casting technique combined with tendoachilles tenotomy; tenotomy was required in 177 patients (93%). Four patients were lost to follow-up. Nine out of sixty-one children in the six-month-to-one-year age group showed the maximum rate of recurrence (15%). The mean number of cast applications was 7.23. In all, 90% of children required casts ranging from four to eight in number. The syndromic association was seen in 10.4% of cases with club feet. Most common among them were neural tube defects (4.2%) and arthrogryposis (3% of cases). Fourteen out of 154 (or 9%) of the non-operated idiopathic patients had lateral border recurrence during an average follow-up of two years. According to the Pirani score, recurrence was seen in eight out of twenty (or 40% of) syndromic patients and five out of fourteen (or 35% of) operated cases. In 37% of recurrences, dynamic supination was observed.
Conclusions: Even though Ponseti's approach to treating idiopathic clubfoot is widely regarded as the gold standard, recurrences are known to occur even in the best of circumstances. The most common cause of recurrence was poor brace compliance, with families citing a variety of reasons.
Case series of results of intertrochanteric femur fracture treated with hemiarthroplasty
Authors: Kalariya Mayur Kantilal , Hiren K. Shah
Published: April 2023

Intertrochanteric femoral fractures are one of those mysteries which become more and more mysterious with advancing knowledge and better imaging modalities. 20 patient of intertrochanteric fracture treated with hemiarthroplasty prospective study done at GCS Medical College and Hospital. Good result obtain in term of early mobilization. The conclusion is that in comminuted fractures. 31A2.2, 31A2.3 by hemiarthroplasty give good result.
Complete transection of permanent pacemaker lead by a dislocated left shoulder prosthesis
Authors: Nair Abhinav , Akkena Sudheer , Al Salihy Mazin , Rohan  , Pillai Anand
Published: April 2023

A case of complete transection of the leads of a permanent pacemaker (PPM) by a dislocated left shoulder prosthesis is reported. An 86 year old woman with a history of B-cell lymphoma diagnosed subsequent to a pathological fracture of the humerus in 2010 was managed by a left shoulder replacement. Subsequently, she underwent chemotherapy for the B-cell lymphoma and the malignant lesion was reported to have resolved. In addition, she further went on to have a PPM- left sided DDDR inserted in 2015 for chronotropic incompetence. Following a mechanical fall she had in 2021, it was found that the PPM leads had been damaged, transected, potentially infected and failing to capture along with a displaced left shoulder prosthesis which was the likely culprit for the PPM damage. A decision was made to not remove the dislocated prosthesis by the multidisciplinary team managing her. This case highlights the importance of an understanding of the complications of shoulder surgeries, including approach adopted for surgery in patients with pacemaker in-situ and the need for regular follow up and imaging.
Video-assisted thoracoscopic surgery for rib chondrosarcoma: unique surgical technique
Authors: Goel Vipin , Khan Bushra , Rampally Snigdha
Published: April 2023

Chondrosarcoma's of the rib are a rare presentations and hence there's a lot to be explored for the best method of surgical intervention. This case highlights how we used VATS for excision of a rib chondrosarcoma and reconstructed the defect using prolene mesh and PMMC flap.
Extensor indicis proprius to extensor pollicis longus transfer in spontaneous rupture of extensor pollicis longus following non displaced fracture distal end radius
Authors: E. G. Mohan Kumar  , G. M. Yathisha Kumar  , Muhammed Noorudheen
Published: April 2023

Exact incidence of extensor pollicis longus (EPL) ruptures following distal radius fracture is not known. Peculiarly it’s common in nondisplaced fracture of the distal radius with an incidence of EPL rupture of 0.2-5%. Cortical irregularities from distal radius fractures or osteophytes easily abrade the tendon, causing gradual attrition and ultimately rupture. Compromised blood supply is also related to EPL rupture which is supported by microcirculatory anatomic studies. We present a case of 49 year old female who presented with spontaneous rupture of the EPL following a nondisplaced fracture of the distal radius managed by extensor indicis proprius (EIP) transfer. EIP transfer gives promising outcome. Optimum tension of the tendon is crucial for good functional outcome. We recommend suturing the tendon with thumb in extension and wrist in neutral position for optimum tension of tendon to avoid extensor lag and to prevent loss of IP flexion.
Isolated calcaneal tuberculous osteomyelitis in a 13-year female: a diagnostic dilemma: rare case report and review of literature
Authors: Chaudhari Kunal , Shah Nadir Z. , Pawar Eknath D. , Marfatia Ankit
Published: April 2023

Foot and ankle involvement in osteoarticular tuberculosis is uncommon and isolated calcaneal tubercular osteomyelitis of foot bones sparing nearby joints with an osteolytic defect is even more rare. Worsening of the disease can occur over a time involving nearby joints and small bones if diagnostic and therapeutic phase are delayed. We present a retrospective study of osteolytic variety of foot calcaneal bone tuberculosis. We present a case report of 13-year female with isolated osteolytic variety of calcaneal tuberculous osteomyelitis to highlight the clinical, radiological features and management challenges of the condition. Biopsy was done to confirm tissue diagnosis based on Gene Xpert, AFB staining, MGIT culture, and histopathology. Surgical intervention was done in form of debridement and sinus tract removal as a diagnostic and therapeutic purpose to prevent further involvement of a nearby joints and small bone with cystic destruction. Isolated calcaneal tubercular osteomyelitis cases are still found to be seen in our environment though considered a rare. When tuberculous pathology is limited to the isolated calcaneal bone sparing the other joints, the prognosis is better than in osteoarticular disease, as there is less deformity, and hence, less residual pain and disability.
Orthopaedic residency in the time of COVID-19: navigating a new normal
Authors: Arjun Ganesh  , M. Mohan Kumar
Published: April 2023

The pandemic had affected outpatient clinics, emergency and elective surgery, rehabilitation, resident training, personnel management, use of personal protective equipment, telemedicine and all sub-specialties of orthopaedics.
The Fubini's Theorem for the Even Index Lie Subgroup
Authors: De Oliveira Leandro Nery , De Alcântara Marcos Aurélio
Published: April 2023

In this paper we present a new proof to generalize the Fubini's Theorem for the even index subgroup of a compact Lie group, using a recent result on the semi-direct product of groups. We also present some applications of this result for the invariant theory.
Brachytherapy using radiation carriers: Case series
Authors: Sethi Aakash , Singh Shikha , Legha Virender Singh , Prasada Guru , Kalia Deepak , Verma Kamal
Published: April 2023

Brachytherapy reduces the post radiation sequalae as the dose required is lower than external beam radiation therapy (EBRT) and limits the area of exposure. This case report outlines two different patients managed by fabrication of radiation carrier prosthesis for the duration of the brachytherapy.
Fabricating 2 piece closed hollow obturator with elastomeric impression material: An innovative dental technique
Authors: Devi Mutum Sangeeta , Ahmed Asif
Published: April 2023

Maxillectomy defects are the most common results in oro-nasal communication, which leads to an expected change in speech tone, difficulty in mastication, and deglutition. These affect the quality of life of the patient and also impact them psychosocially in a long run. The most common management of maxillectomy patients for both complete and partial is by maxillary obturator prosthesis. To reduce the weight of the obturators various procedures of hollowing are present in literature. In this article, we will discuss an alternate and innovative laboratory technique for the fabrication of closed hollow obturator which will reduce the time of both dental technicians and clinicians.
Critical Multicultural Analysis of Award-winning Texts Representing Latina/o/e Experiences
Authors: Pratt Kristen L. , Puzio Kelly , Lee Ying-Hsuan , Crawford-Tobias Leeah , Hatton-Chamberlain Amanda
Published: April 2023

ABSTRACT: The Pura Belpré Award honors Latina/o/e writers and illustrators whose works are acknowledged as best portraying, affirming, and celebrating Latina/o/e cultural experiences for children and youth. Using a critical content analysis of 14 chapter books that received the award, we share findings that reveal the texts consistently portrayed Latina/o/e central characters through asset-based frameworks. The critical content analysis indicated that the central characters demonstrated the asset-based strengths of interdependence and resourcefulness. Interdependence was demonstrated with families and communities, and remarkable resourcefulness was evidenced by pooling physical, internal, and social resources to creatively solve challenges. Implications for practice, especially in relation to supporting culturally sustaining pedagogy in classrooms, are discussed.
But What Does it Look Like in Maths?
Authors: Marshall Samantha
Published: April 2023

In response to urgent calls for teaching that is culturally affirming, scholars have developed a myriad of images of culturally sustaining (and related) pedagogies (CSPs). However, for maths teachers, CSPs remain elusive, in part because these images are typically content-neutral and their applicability to practice opaque. In this paper, I synthesize research to help conceptualize and clarify what CSPs may look like specifically in mathematics classrooms. I offer a framework for CSPs in mathematics comprised of four dimensions: (1) anti-assimilationism, (2) strengths-based teaching, (3) power and justice, and (4) affirming identities.
Aportes sobre el vínculo entre buenas prácticas agrícolas (BPA) y territorialidad en la provincia de Buenos Aires, 2002-2018
Authors: Auer Alejandra
Published: April 2023

El espacio rural se encuentra en tensión debido a la predominancia de un modelo agroproductivo basado en el uso de insumos químicos, y la creciente demanda social por una agricultura más amigable con la salud ambiental y humana, en consonancia con la búsqueda de sustentabilidad. El objetivo del trabajo es analizar la territorialidad rural y la implementación de buenas prácticas agrícolas (BPA) en los partidos de la provincia de Buenos Aires en los últimos 16 años, excepto los 24 partidos del Gran Buenos Aires. Para ello, se analizaron comparativamente los datos del Censo Nacional Agropecuario 2002 y 2018. Las variables relacionadas a la territorialidad fueron: trabajo y residencia del productor/a y su familia en la explotación agropecuaria (EAP) y asociativismo. Para las BPA, se consideraron las variables: análisis de suelo, agricultura de precisión, rotación de cultivos y con ganadería, monitoreo y control biológico de plagas, entre otras. Los resultados muestran valores medios en la territorialidad de la mayor parte de los partidos, bajos en las zonas predominantemente ganaderas y altos en algunos partidos aislados. En relación a las BPA se observan valores altos en la Pampa Interserrana, Pampa Plana y oeste de la Pampa Ondulada, disminuyendo a valores medios al centro-este de esta región, similar a la Pampa Patagónica, y valores bajos en la Pampa Deprimida. Respecto de la variación intercensal, en la mayoría de los partidos se observa una reducción en las variables referidas a la territorialidad y un aumento respecto a la dimensión BPA. Contrario a lo esperado, se observa una relación negativa entre BPA y las diferentes categorías de territorialidad. Conocer las variaciones en la aplicación de las BPA y su relación con la territorialidad rural permite aportar información para tomar medidas que orienten a los productores/as y/o sus asesores hacia un manejo más sustentable del socio-ecosistema.
Una llamada desde el Sur Global a revisar la investigación participativa en clave de justicia en “Democratising Participatory Research”
Authors: Fernández-Baldor Álvaro
Published: April 2023

El libro de Carmen Martínez Vargas titulado “Democratising Participatory Research: Pathways to Social Justice from the South”, es una invitación desde el Sur Global, en este caso desde Sudáfrica, a repensar la forma de producir conocimiento. En el libro hace un llamado a las universidades para abrir la generación de conocimiento a la sociedad, democratizando los procesos de manera que se incorpore el conocimiento de aquellas personas situadas en los márgenes. Para ello propone las “democratic capabilities research”, inspiradas en el Enfoque de Capacidades para generar conocimiento de manera más democrática. El libro es muy recomendable para aquellas universidades y personal investigador que quiera reflexionar sobre sus prácticas investigadoras desde una óptica de justicia social. También es una invitación a reconsiderar cómo hacemos la investigación participativa considerando nuestros sesgos occidentales.
La influencia de la UNRWA en el desarrollo del nacionalismo palestino
Authors: Espin Ocampo Julieta
Published: April 2023

Tras siete décadas al servicio exclusivo de los refugiados palestinos, el Organismo de Obras Públicas y Socorro de las Naciones Unidas para los Refugiados de Palestina en el Cercano Oriente (UNRWA por sus siglas en inglés) ha coadyuvado a perfilar, incluso de manera involuntaria, la evolución del nacionalismo palestino en el exilio. Tras la creación del Estado de Israel en 1948, aproximadamente el 70% de los palestinos se convirtieron en refugiados, quienes, sin un Estado propio que consolidara y estructurara una identidad nacional, debieron reconstruir sus identidades y lazos sociales en el exilio. En consecuencia, los carnés de identidad, las cartillas de racionamiento, los servicios de salud, pero, sobre todo, los campamentos de refugiados y el sistema educativo ofrecidos por la UNRWA influyeron de forma decisiva en la evolución de la identidad y la consecuente lucha palestina. El presente trabajo describe el surgimiento de la UNRWA y la evolución histórica de su relación con el colectivo de refugiados palestinos disperso en Oriente Medio, para posteriormente analizar el papel que tanto los campamentos de refugiados y las escuelas de esta agencia de Naciones Unidas han jugado en la evolución del nacionalismo palestino, así como los límites de la influencia de dicha institución y su instrumentalización por parte de otros actores palestinos.
Comparison of the Graduation Rate of the Master's Degree in the FIS PUEB Computer Science and Quantitative Study Programmes
Authors: Doucek Petr , Snedomova Lea
Published: April 2023

A very serious problem at PUEB is the graduation rate for graduate studies. The failure rate for undergraduate studies is as high as 60% in some years for some degree programs. For the purpose of this paper, we analyze data on the study results between 2015 and 2020 for FIS master's degree programs. Our aim is to compare the "Completion rate" between different groups of degree programs - one of them is computer science degree programs and the other is quantitatively oriented programs (“Econometrics and Statistics”). We will use data for the analysis from the university information system. We will analyze those using MS Excel tools. The paper provides answers to the two research questions. The results obtained so far indicate that the main common feature, regardless of “Informatics” or “Quantitative Methods”, is the method of funding. Graduation rate is higher for almost eight per cent points in Quantitative oriented study programs then in Informatics studies. If the student pays for his/her own tuition, the study period is shorter for both groups of study programs students than if he/she uses public funds to finance it.
Virtual Business Simulation as a Tool Fostering Modern Teaching Methods in Higher Education Institutions
Authors: Faron Agnieszka , Kabashi Atdhe
Published: April 2023

Contemporary methods for education have always been the main point in offering the best practices on teaching and learning in higher education institutions. Recently during, and after the pandemic, digitalisation of teaching as a process has accelerated to a new level. Different companies are working and developing new digital and even virtual simulations that are offering not only to students, new and modern ways of enhancing their skills in managing different situations just like in real life. These new technologies are providing students and higher education institutions with opportunities to bring ’‘close to real life ’’experiences with lower costs and fewer procedures. Learning-based virtual simulation games belong to a new developing approach in education. This paper demonstrates the use of a business simulation game in the process of flourishing skills and managerial competences. We describe the tool - Revas Business Simulation Game as a potential instrument facilitating change in competences, skills and attitudes, crucial on labour market.
Exploring the Content of Sustainability Reports: What Social Information are Croatian Companies Disclosing
Authors: Galant Adriana
Published: April 2023

After the Nonfinancial reporting Directive (2014/95/EU) has come into force, the nonfinancial reporting (i.e. sustainability reporting) has gain more attention since it became mandatory for certain companies. Benefits of preparing sustainability report are numerous, mostly related to providing information about environmental and social impacts of companies to larger group o stakeholders. Considering the importance of disclosing social information, the main aim of this paper was to explore the sustainability reports of Croatian companies prepared using GRI Standard and to identify which social disclosures are included into sustainability reports, but also which ones are not. In order to do that, content analysis of 19 reporting companies has been conducted and so collected data have been analysed. Analysis has shown that majority of disclosed social information are related to employees issues, while at the same time disclosure of social issues related to customers and local communities are less represented in sustainability reports.
Nabor kriterijev za ocenjevanje podatkovne zrelosti v malih in srednjevelikih podjetjih
Authors: Gašperlin Blaž , Pucihar Andreja , Kljajić Borštnar Mirjana
Published: April 2023

Digital transformation is moving toward a new paradigm, data-driven digital transformation. As the amount of data increases, so does the need and capability to manage data efficiently. Small and medium-sized enterprises (SMEs) lag behind in this effort because they often lack the resources (financial, human, time, knowledge) to move from a dataimmature to a data-mature enterprise. In response to this problem, a number of data maturity assessment models have been proposed and developed, but they are too general, contain an incomplete set of criteria to comprehensively assess data maturity, or are focused on large enterprises and therefore less suitable for SMEs. In this paper, we focus on selecting criteria for assessing SMEs’ data maturity. In formulating the criteria, we followed a design science research approach and the steps of a DEX methodology. The selected criteria will serve as the basis for the development of a multi-criteria model for assessing the data maturity of SMEs.
Stres v šoli in na delovnem mestu
Authors: Grafenauer Ekart Živa
Published: April 2023

Stress is an unpleasant state of emotional and physiological upset that people experience in situations they perceive as dangerous or threatening. On the one hand, moderate stress can improve motivation and performance in less complex tasks, while on the other hand, prolonged and severe stress hinders the performance of difficult tasks. Children at school and adults at work are challenged with solving different problems. In both cases, the individual (child or adult) feels stress because if he is not sure, whether he has enough skills to cope with the problem or task. The most often school-related stress is caused by grades, parental pressure and bullying. Bullying relates either to bad relationships with classmates or teachers. At work, the individual most often feels stress due to a lack of skills, excessive workload, low support from colleagues or a gap between the effort invested and the reward for it.
Interdisciplinarni pogled na pravo
Authors: Igličar Albin
Published: April 2023

The general framework and methodological starting points for all views of law are directed and connected by the dialectical method. When studying law, we move from its exterior to its essence. On the outside, law first appears as a norm. The attention of the (pure) theory of law is focused on the norm. The philosophical view of law highlights the values that are the basis for legal norms. The sociological aspect of law is oriented towards actual social relations. An interdisciplinary approach leads to an integral explanation of law as a whole of values, norms and relations. Interdisciplinarity is also represented by historical, comparative, etnological and psyhological investigations of legal phenomena. These insights can be joined by the perspective of organizational sciences.
Pomen zagotavljanja psihološke varnosti v primeru mednarodnih združitev in prevzemov podjetji v času po pandemiji
Authors: Javor Tina , Šprajc Polona
Published: April 2023

The pandemic, geopolitical instability, soaring inflation, supply chain issues, turbulent capital markets, and regulatory changes have all contributed to greater economic uncertainty, which has also been reflected in international mergers and acquisitions. Therefore, to get the most out of international transactions, companies must create a suitable work environment and organizational climate that encourages psychological safety and, consequently, contributes to the establishment of trust and cooperation among employees. A psychologically safe work environment encourages a diverse exchange of opinions, facilitates faster learning and innovation, improves productivity, helps in the early detection of risks and problem-solving, and is generally good for the long-term business of companies.
Vzpostavljanje Evropske mreže nacionalnih centrov za celostno obravnavo raka
Authors: Jelenc Marjetka , Albreht Tit
Published: April 2023

Cancer management is an extremely challenging field where proper planning is key. The Europe's beating cancer plan envisages the establishment of the European network of national comprehensive cancer centers by 2025. The network will connect national centers for the comprehensive cancer care, which will facilitate the quality assurance of diagnostics, treatment, research, training in the EU. By 2030, 90% of cancer patients should have access to the new network. The European Commission will develop the model of the network, including the professional, scientific, educational and administrative framework for a sustainable structure, through the CraNE Joint Action. More than 100 experts, researchers, consultants from 24 European countries will be involved in the work, thus ensuring professionalism, interdisciplinary and regional view. The European network will help to ensure quality care, reduce inequalities in the EU, and access to the network will enable patients to receive quality diagnostics and treatment close to home.
Razumevanje delovanja umetne inteligence je od matematike sedmega razreda oddaljeno največ 37 konceptov
Authors: Jerebic Janja , Bokal Gregor , Galun Maša , Vogrinec Monika , Bokal Drago
Published: April 2023

Learning space is a formal mathematical structure that enables modeling of a learning process. Knowledge structure consists of items of information that the individual learns, and the states of knowledge, in which the individual finds himself when he acquires knowledge. Items of information and states of knowledge respect the axiom of accessibility and learning consistency. A path in the learning space represents a walk from the state, where the individual does not know any of the items, to the state in which the individual acquires all the items of information. In this paper, we analyze the learning space of seventh-grade mathematics and the learning space of a research paper, in which a seventh grader presented the reinforcement learning algorithm of the game Nim at a level accessible to elementary school students. Based on the analysis, we evaluate that reinforcement learning is 37 items of information away from seventh grade math to understand, not accounting for the concepts required to program it in Python. We complete the analysis with suggestions of further research on introducing artificial intelligence in primary and secondary schools.
Vpliv angažiranosti študentov v pedagoškem procesu na uspešnost pri izpolnjevanju študijskih obveznosti pri metodoloških predmetih
Authors: Jerebic Janja , Kozinc Anja , Brezavšček Alenka
Published: April 2023

In this paper, we present the results of a case study with social science students in which we examined the influence of various factors of student engagement on success in fulfilling teaching responsibilities in a mathematics subject. In the analysis, we considered the following forms of student engagement: attending lectures, participating in tutorials, engaging in regular e-activities in the online classroom, and participating in earning extra credit. We found that all of these factors were positively related to exam performance. The latter means that students who engage more intensively in the pedagogical process also achieve better results. We confirmed the negative correlation between the exam grade and the number of exam attempts. This suggests that more engaged students fulfil their study obligations faster and require fewer exam attempts. In addition, the results of the simple linear regression showed that exam performance is statistically significantly positively influenced by students' attendance in lectures and tutorials.
ОПРЕДЕЛЕНИЕ НЕСУЩЕЙ СПОСОБНОСТИ СВАЙНО-ВИНТОВОГО ФУНДАМЕНТА В КРИОЛИТОЗОНЕ
Authors: Кулешов Александр Петрович , Николенко Ирина Александровна , Горлов Андрей Александрович
Published: April 2023

Ссылка для цитирования: Кулешов А.П.,  Николенко И.А., Горлов А.А. Определение несущей способности свайно-винтового фундамента в криолитозоне // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.163-174.

Актуальность исследования заключается в проблеме расчета несущей способности винтовых свайных фундаментов в условиях распространения криолитозоны при воздействии статических выдергивающих и вдавливающих нагрузок. Свайно-винтовые фундаменты – довольно новый вид в строительстве, хотя первые упоминания о них относятся к концу XVIII – началу XIX вв. Данная технология зарекомендовала себя с самой наилучшей стороны. В последние годы винтовые сваи обретают широкую популярность при строительстве разнообразных объектов, однако все еще занимают относительно небольшую долю в фундаментостроении. Потенциал этой технологии слабо раскрыт, не регламентировано определение несущей способности в отечественных нормах. Цель состоит в анализе существующих методик и разработке рекомендаций по расчету несущей способности свайно-винтовых фундаментов в условиях криолитозоны, сравнении результатов расчетов предельных сопротивлений данного вида фундамента, полученных различными методами, с натурными полевыми испытаниями и буроопускными сваями. Методы: систематизация, анализ отечественного и зарубежного опыта расчета винтовых свай в районах распространения многолетнемерзлых грунтов; сбор и обработка материалов полевых испытаний грунтов винтовыми сваями в районе обустройства Бованенковского месторождения; вычисление несущей способности различными методиками и сопоставление результатов с данными натурных полевых испытаний и буроопускных свай; описание методики проведения полевых испытаний свай в условиях криолитозоны. Результаты. Выполнены вычисления несущей способности винтовых свай в условиях криолитозоны различными описанными в литературных источниках методиками и их сопоставление с данными полевых натурных испытаний грунтов; проведена сравнительная оценка несущей способности винтовых свай с металлическими буроопускными сваями с наконечником в одних и тех же геокриологических условиях, выявлены достоинства и недостатки рассмотренных методов и различных типов свайных фундаментов. На основе полученных результатов сделаны выводы о возможности применения винтовых свай в криолитозоне и получения необходимой и достаточной информации для их проектирования.
АНАЛИЗ ЭФФЕКТИВНОСТИ ТЕХНОЛОГИИ ВОДНОГО HUFF AND PUFF НА ОСНОВЕ МИРОВОГО ОПЫТА ПРИМЕНЕНИЯ И ЛАБОРАТОРНЫХ ИССЛЕДОВАНИЙ
Authors: Цыкунов Олег Игоревич , Каешков Илья Сергеевич
Published: April 2023

Ссылка для цитирования: Цыкунов О.И., Каешков И.С.  Анализ эффективности технологии водного Huff and Puff на основе мирового опыта применения и лабораторных исследований // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.22-33.

Актуальность. Сегодня в разработку вводится большое количество нефтяных месторождений с трудноизвлекаемыми запасами, в частности, с низкопроницаемыми коллекторами. При проницаемости менее 1 мД система поддержания пластового давления имеет низкую эффективность, а добывающие скважины имеют высокие темпы падения и низкие дебиты даже при наличии гидроразрыва пласта. Помочь в решении данной проблемы может новая технология – водный Huff and Puff. Данная технология представляет собой циклическую закачку воды, остановку и последующий отбор жидкости на добывающей нефтяной скважине. Она позволяет инициировать процесс капиллярной пропитки в малодебитных безводных скважинах в низкопроницаемом коллекторе и увеличить добычу нефти. Цель: проанализировать мировой опыт применения и лабораторные исследования технологии Huff and Puff, определить ключевые параметры ее эффективности, сформулировать критерии применимости технологии. Объекты: процесс капиллярной пропитки в низкопроницаемом нефтенасыщенном коллекторе, результаты лабораторных исследований, отчеты о применении технологии на нефтяных месторождениях. Методы: оценка и анализ существующих лабораторных исследований технологии на керне, анализ условий и методик проведения экспериментов и их результатов, сравнение с аналогичными исследованиями, выявление общих зависимостей; обзор опыта применения технологии в США, КНР и России, сравнение их результатов с результатами лабораторных исследований. Результаты. В процессе анализа лабораторных исследований выявлены ключевые параметры эффективности применения технологии – наличие трещин в коллекторе, низкая проницаемость, гидрофильность и маленький характерный размер поровых каналов. Анализ мирового опыта применения водного Huff and Puff показал, что технология успешно применяется в КНР на малопроницаемых гидрофильных пластах на скважинах с многостадийным гидроразрывом пласта, что подтверждает лабораторные исследования. Опыт применения в США не был успешным из-за гидрофобности коллекторов. Опыт в России имеет неоднозначные результаты – из-за гидрофильности и низкой проницаемости пласта эффект капиллярной пропитки присутствует, но из-за конструкции скважин и отсутствия раскрытых трещин гидроразрыва пласта значительного эффекта не было. Результаты опыта применения согласуются с данными лабораторных испытаний. В результате данного анализа были сформированы критерии применимости технологии водного Huff and Puff.
ГЕОХИМИЧЕСКИЕ ОСОБЕННОСТИ ПРИРОДНЫХ ВОД КАРЬЕРОВ СТРОИТЕЛЬНОГО КАМНЯ ПИТКЯРАНТСКОГО РАЙОНА (КАРЕЛИЯ)
Authors: Сидкина Евгения Сергеевна , Торопов Андрей Сергеевич , Конышев Артем Александрович
Published: April 2023

Ссылка для цитирования: Сидкина Е.С., Торопов А.С., Конышев  А.А. Геохимические особенности природных вод карьеров строительного камня Питкярантского района (Карелия)// Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.7-21.

Актуальность исследования связана с важностью региональной оценки воздействия разработки месторождений строительного камня на природные воды северного Приладожья. Сохранение высокого качества воды Ладожского озера, в площадь водосбора которого входит район исследований, является критически важной задачей ввиду активного использования ресурсов озера в хозяйственно-бытовом и производственном водоснабжении, а также рыболовстве, сельском хозяйстве. Цель: изучить химический состав и выявить основные особенности поведения химических элементов в природных водах карьеров строительного камня. Объекты: природные воды и горные породы карьеров строительного камня Питкярантского района Республики Карелия. Методы. Химический состав природных вод определяли с помощью набора методов: потенциометрическое титрование, ионная хроматография, атомно-эмиссионная спектрометрия и масс-спектрометрия. Минеральный состав пород определен с помощью электронной микроскопии и порошковой рентгеновской дифракции. Оценка подвижности химических элементов проводилась по коэффициентам водной миграции (Kx) по А.И. Перельману. Формы нахождения химических элементов в природных водах рассчитаны в программном комплексе HCh. Результаты. Все изученные воды являются пресными нейтральными или слабощелочными HCO3 Ca, SO4-HCO3 Na-Ca или HCO3 Na-Ca. Анализ широкого спектра химических элементов позволил определить, что наибольшей подвижностью в рассматриваемых водах обладают S, Ca, Mg, As, Mo, U, Re. К легко подвижным и подвижным относятся металлы, источниками которых являются сульфидные минералы и полевые шпаты. Согласно термодинамическим расчетам доминирующей формой нахождения Zn, Cd, Ni, Co, Sr, Rb, Ba и Cs является ионная, Cu – карбонатная, а Pb – карбонатная и гидроксильная. Основные формы нахождения U представлены карбонатными комплексами. Вода Ладожского озера отличается от карьерных вод меньшей минерализацией и величиной pH, более низкими содержаниями металлов, для которых в еще большей степени характерно нахождение в ионной форме. Коэффициенты водной миграции в целом схожи во всех изученных пробах, однако профиль Кх для Ладожского озера несколько отличается от карьерных. Это объясняется наложением факторов и процессов, формирующих химический состав вод такого крупного озера. Для карьерных вод характерен рост концентраций некоторых микроэлементов, в особенности U, Li, Mo, Re, с увеличением времени взаимодействия и соотношения порода–вода.
СРАВНИТЕЛЬНЫЙ АНАЛИЗ ФИЗИКО-ХИМИЧЕСКИХ МЕТОДИК ПЕРЕРАБОТКИ АЛЮМИНИЕВЫХ ОТХОДОВ
Authors: Новиков Александр Станиславович , Мостовщиков Андрей Владимирович , Сударев Евгений Александрович
Published: April 2023

Ссылка для цитирования: Новиков А.С., Мостовщиков А.В., Сударев Е.А. Сравнительный анализ физико-химических методик переработки алюминиевых отходов / // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.53-61.

Актуальность исследования обусловлена необходимостью разработки новых методик по утилизации металлических отходов. Данное направление, при участии различных интенсифицирующих воздействий, относится к ресурсосберегающим, технологическим, минимизирующим объемы капитальных затрат на сырьё, производство и последующую реализацию. Цель: изучить физико-химические методики по щелочной и кислотной переработке алюминиевых отходов в поле ультразвука, рассмотреть механизмы этих процессов, сравнить кинетические характеристики, выявить плюсы и минусы методик и на основании сравнительного анализа сделать вывод о том, какая из методик наиболее эффективна. Объекты: образцы алюминиевых отходов в виде пластинок и стружки. Методы: волюмометрия, сонохимический синтез, оценка и анализ кинетических кривых процесса при разных температурах, рентгенофазовый анализ. Результаты. Проведен анализ кинетических кривых, констант скоростей процессов при различных температурах, порядков химических реакций. Были сравнены между собой значения энергий активации целевых химических реакций, характеристики кинетических областей процессов. Несмотря на длительный индукционный период, кинетический потенциал кислотной переработки алюминиевых отходов оказался в 2 раза выше, чем у щелочной при температурах 313–323 К. Ультразвуковое излучение на эту характеристику существенно не влияло, хотя и снижало индукционный эффект в 2 раза. Механизмы протекающих сонохимических процессов в данных методиках оказались очень схожими между собой, принципиальных различий не наблюдалось. Полученные в ходе химической переработки продукты в виде водорода, гидроксида, хлорида и ортофосфата алюминия на данный момент крайне востребованы в энергетической, химической и силикатной промышленности, а также в медицине.
GÉNOTIPOS DE SOJA NO ESTADO DO TOCANTINS EM DIFERENTES ÉPOCAS DE SEMEADURA, VISANDO TEORES DE ÓLEO E PROTEÍNA
Authors: Campos Marcio Luiz , Mucci Peluzio Joênes , Reina Evandro , Josias Farias Monteiro Fábio , Bonfim Ribeiro dos Santos Domingos
Published: April 2023

A soja é um grão sazonal que vem movimentando grande parte do mercado brasileiro, exportando ou para fins de consumo interno. Neste sentido, em virtude do interesse comercial dos teores de óleo e proteína dos grãos, que são  afetados pelas diferenças genéticas e por efeitos ambientais, propôs-se o presente estudo.  Foram avaliados o efeito de três épocas de semeadura (18/12, 04/01 e 01/02/2022) em sete  cultivares de soja sob baixa latitude com vistas aos teores de óleo e proteína dos graõs. O delineamento experimental utilizado foi de blocos casulaizados com sete tratamentos e quatro repetições. Os tratamentos foram NEO 720 IPRO, OLIMPO IPRO, MSOY 8644 RR, BÔNUS IPRO, MSOY 8349 RR, DM 82I78 RR, NEO 850  IPRO . Temperaturas mais altas e menores médias de precipitações pluviométricas contribuíram para o aumento dos teores de proteína e redução no teor de óleo dos grãos. A cultivar MSOY 8644 RR apresentou maior conteúdo de óleo e NEO 850 IPRO e MSOY 8349 RR maior teor de proteína nos grãos.
COMPORTAMENTO DURANTE O ARMAZENAMENTO DA QUALIDADE FISIOLÓGICA E SANITÁRIA DE SEMENTES DE GERGELIM
Authors: Queiroz Vanderleis Gabriel , Rodrigues Maciel Eloah , Vieira Silva Dayara , Sumara Moreira Fernandes Patrícia , Sales Barros Rayner , Fidelis Rodrigo Ribeiro
Published: April 2023

O trabalho científico teve o intuito de avaliar a qualidade fisiológica do armazenamento da Sementes de Gergelim durante 6 meses. O presente trabalho teve por objetivo avaliar o comportamento durante o armazenamento da qualidade fisiológica e sanitária de sementes de gergelim. A pesquisa foi desenvolvida no Laboratório de Fitotecnia da UFT, Gurupi-TO. Utilizaram-se sementes de gergelim da cultivares BRS (Anahi, K3, Seda e Trebol). Os testes realizados nas avaliações foram: Peso de mil sementes, Germinação, Envelhecimento acelerado (Vigor), Germinação em areia (Avaliação de emergência e índice de velocidade de emergência) e Sanidade, foram conduzidas em 4 repetições de 50 sementes por tratamento. O delineamento utilizado foram quatro tratamentos armazenados durante seis meses, onde as médias oram comparadas por meio do teste Tukey a 5%. Durante o período de armazenamento, as sementes de gergelim não mantiveram qualidade fisiológica e sanitária satisfatória, a redução de germinação foi de aproximadamente 30% quando armazenadas sob a temperatura de 23 ºC por 6 meses, essa temperatura favorece o desenvolvimento e aumento de patógenos.
ÓLEO ESSENCIAL DE Morinda citrifolia NO CONTROLE DA CIGARRINHA DO MILHO E EFEITO FITOTÓXICO
Authors: Oliveira Guilherme Eduardo , Dias Bruna Leticia , De Souza Carlos Mourão Dalmarcia , Rodrigues dos Santos Gil
Published: April 2023

O elevado valor socioeconômico do milho (Zea mays L.) e a necessidade de aumento da produtividade impulsionaram o crescimento das áreas cultiváveis, o que tem gerado grandes desafios no controle fitossanitário das lavouras. O complexo de enfezamento, transmitida pela cigarrinha do milho (Dalbulus maidis) é responsável por perdas significativas de produtividade e ainda são escassas as técnicas de manejo capazes de reduzir a severidade dos danos causados pelo inseto. Também, tendo em vista a tentativa de contensão e da utilização de pesticidas em larga escala que têm gerado preocupação pelos inúmeros riscos e efeitos adversos. Com isso, este trabalho teve como objetivo avaliar o potencial do óleo essencial (OE) de noni (Morinda citrifolia) como controle alternativo da cigarrinha do milho e avaliar o seu efeito fitotóxico. Para isso, as plantas e as cigarrinhas foram submetidas ao OE por contato, sendo a toxicidade sobre a cigarrinha, observada por meio da mortalidade dos insetos. O OE de noni demostrou potencial inseticida e não foi tóxico às plantas.
CONTAMINAÇÃO POR AGROTÓXICOS E SEGURANÇA ALIMENTAR EM HORTAS COMUNITÁRIAS DA CIDADE DE PALMAS-TO
Authors: Reis Figueiredo Alice , Da Silva Yuri Vinicius , Da Silva Gualberto Larissa , Guarda Emerson Adriano , Guarda Patricia Martins
Published: April 2023

As hortas comunitárias urbanas são um grande incentivo a geração de renda e a alimentação saudável, pois nestas é proibido o uso de qualquer agrotóxico nas suas produções de hortaliças. Estes produtos têm forte interferência na qualidade de vida da população humana, e trazem consequências diretas para a saúde pública, pela contaminação residual nos alimentos. Este trabalho objetivou a pesquisa em hortas comunitárias urbanas em Palmas-TO, através de um mapeamento desses locais, aplicação de questionário com ênfase, num diagnóstico de produção, uso e manuseio de agrotóxicos nestes ambientes, assim como detecção de Cipermetrina, em amostras de couve produzidas nestes locais, por CG-EM (Cromatografia gasosa acoplada a espectrometria de massas). Verificou-se que embora os produtores não apontassem a utilização dessas substâncias, em contraponto aos relatos de órgãos de fiscalização dos locais, foram detectados a presença de Cipermetrina como contaminante em 87,5% das amostras analisadas. Estes resultados trazem uma enorme preocupação frente a saúde dos trabalhadores, e segurança alimentar da população que consome tais alimentos.
NOÇÃO DE MÚSICA DE MONTAGEM E O PROCESSO DE CRIAÇÃO DE FONOGRAMAS
Authors: Fagundes Gomes Rodrigo , Oliveira Heitor Martins
Published: April 2023

A noção de música de montagem é o ponto de partida para compreensão do processo de gravação como processo de composição, calcado em técnicas de sobreposição de canais e na etapa de mixagem para construção de sonoridades. A prática criativa e a reflexão sobre a criação sonora em mídia fixa são fundamentadas por conceitos e repertórios artísticos pertinentes. A escuta reflexiva, conduzida pelo primeiro autor sobre álbuns de Milton Nascimento e do grupo gaúcho Quintal de Clorofila, explora as associações que as sonoridades apresentadas nos fonogramas evocam e como elas afetam este ouvinte, aproximando-se das técnicas de montagem/mixagem por meio da experiência estética. A partir da reflexão sobre os conceitos e técnicas da música de montagem e das experiências estéticas de escuta, o primeiro autor empreendeu uma prática de criação sonora em home studio. A poética sonora resultante está organizada em quatro faixas nas quais se apresenta uma narrativa sonora autobiográfica e subjetiva. A noção de música de montagem contribui para abordar as técnicas do estúdio e a construção de sonoridades decorrentes de edições, processamentos e mixagem de áudio como inerentes ao processo criativo, conectando intencionalidades e resultados estéticos de poéticas sonoras.
What drives the unemployment rate in Maldives? An Autoregressive Distributed Lag (ARDL) approach
Authors: Irushad Ali , Mohd Thas Thaker Mohamed Asmy , Mohd Thas Thaker Hassanudin
Published: April 2023

Purpose – This paper examines factors that determine the unemployment rate in the Maldives.
Methods – This paper uses an Autoregressive Distributed Lag (ARDL) model in capturing long and short-run associations among the chosen variables. It uses some macroeconomic variables, namely unemployment rate, population, economic growth, foreign direct investment, external debts, inflation rate, and expatriate workers.
Findings – The empirical results suggest that except for expatriate workers, all the variables are significant determinants of unemployment rate in the long run. The study found that economic growth and inflation would negatively and significantly contribute to unemployment rate when they are combined. This explains the unemployment nexus which follows the Phillips curve and Okun’s law relationship provides the presence of both these hypotheses in the Maldives in the short-run and long-run. In addition, an increase in population and external debts worsens the unemployment situation in the Maldives. Although expatriate workers are not significant in the long run, the results reveal that they have a significant positive effect on unemployment in the short run.
Implications – This result implies that the Maldivian government should encourage locals in the country to participate in the labor force and limit the participation of expatriate workers in an industry that has a shortage of skilled expertise.
Originality – This study expands our understanding of key determinants of the unemployment rate in Maldives. To the best of the authors’ knowledge, this research is among the pioneer empirical study to assess the issue.