bluuebunny/crossref_metadata_2025 huggingface dataset:
Determining the invariant of inter-frame processing for constructing the image similarity metric
Authors: Gorda Elena , Serdiuk Anatolii , Nazarenko Ivan
Published: May 2023

The relevance of modeling digital images is determined by the need to implement approaches in the study of localization and identification of objects in order to reduce the amount of data. In this paper, the study object is the topology of a discrete two-dimensional image within the framework of the problem of determining the invariants of diffeomorphic transformations. Geographic information objects (GIOs) refer to objects that are on a given surface or objects that locally change the surface. With regard to objects, it is assumed that the change in their geolocation in the process of forming both single images and an extended series of frames obtained in the process of continuous monitoring is insignificant. In the process of scanning the surface, possible changes in the position of the image source are taken into account, for example, such as yawing, rolling, and pitch in the case of unmanned aerial vehicles (UAVs). These maneuvers are represented as a group of diffeomorphisms that are controlled by the internal gyroscopes of the carrier and the external navigation system. Based on the studies reported here, the initial ontology of digital images (ODI) has been determined by using the model of color spaces and functions of a special kind. The presence of an ontology makes it possible to build an adequate topology of color distribution in the image and take into account the specificity of the distribution of different colors in a digital image. The study results indicate that a promising method is to determine the similarity by constructing a color atlas structure graph (CASG) based on ODI and by determining invariants as a fragment of CASG inherited by all images in the sequence. The scope and conditions for the practical use of the result include its application to the analysis of images by methods of artificial intelligence
Revealing the influence of ultrasonic processing on the kinetic parameters of convective and combined drying of raw apple materials
Authors: Savoiskyi Oleksandr , Sirenko Viktor
Published: May 2023

The object of research is the process of convective and combined drying of apple raw materials treated before dehydration in an ultrasonic bath. The use of pretreatment solves the issue of intensifying the dehydration process and maintaining the quality of the product.
Sonication for 5 min reduces the dehydration process by 13.7 %, and at 10 min processing – by 27.8 % compared to traditional convective drying. With increasing processing time to 20 minutes, the dehydration rate deteriorates.
Sonication of raw materials for 5 minutes under combined heating does not intensify the dehydration process, and within 10 and 20 minutes it reduces the efficiency of moisture removal. When processed for 10 minutes, the time to reach the final moisture content is increased by 17.2 %, and at 20 min – by 23.4 % compared to control samples.
Regardless of the processing time, there is a decrease in the maximum temperature of the samples in the combined drying process. When processed for 5 minutes, the maximum temperature of the samples decreased by 4.3 %, and with 10 and 20-minute processing – by 8.6 % and 12 % compared to the temperature of samples without sonication.
The results are explained by the "sponge effect" caused by ultrasonic vibrations and the phenomenon of cavitation that occurs in the liquid during the action of the ultrasonic field.
The peculiarity of the pre-sonication before drying is the possibility to intensify the convective dehydration process without increasing the heat carrier's temperature. The use of this type of processing in a combined energy supply will solve the problem of preserving the quality of the finished product by reducing the maximum temperature of the raw material.
The research reported here could be a prerequisite for practial design of an energy-efficient electrical system for drying fruit and vegetable raw materials.
Framework based on conformal predictors and power martingales for detection of fixed football matches
Authors: Zhuk Ivan , Chertov Oleg
Published: May 2023

One of the difficult problems that arises during football competitions is match-fixing. In terms of negative effect, such shameful phenomena are commensurate with the problem of doping. This paper has analyzed known methods for the possible detection of match-fixing, including sociological analysis of participants in match-fixing, methods for predicting the outcome of the match, analysis of bets and performance of the player or team during the match. It is noted that the assessment of match-fixed results in the considered methods is carried out based on the analysis of a large amount of data. But such information is not always available. Given the insufficient formalization of the problem area, it is relevant to conduct research that does not require a large amount of non-publicly available data but, at the same time, makes it possible to effectively identify potentially suspicious matches regarding a fixed result. The description of the input data is formalized in the form of a data structure containing a chronological history of the results of football seasons, the ranking of teams and matches of the season depending on the overall result of the teams in the season. A method for detecting suspicious football matches with a fixed result has been built using conformal predictors and power martingales within which a new measure of non-conformity has been introduced to determine atypical football matches. To obtain a generalization of the statistics of atypical matches, a power submartingale was used. Evaluation of the effectiveness of the developed method for detecting suspicious football matches was carried out based on precision and recall of the classification metrics using data on the 2013–2014 season of the French II League. The quality of work of the developed method reaches 85 % in terms of precision metric, 96 % in terms of recall metric, and 0.853 in terms of metric F1.
Surface quality improvement of steel parts by combined laser-ultrasonic treatment: determination algorithm of technological parameters
Authors: Lesyk Dmytro , Dzhemelinskyi Vitaliy , Mordyuk Bohdan , Martinez Silvia , Kondrashev Pavlo , Grzesiak Dariusz , Klyuchnikov Yurii , Lamikiz Аitzol
Published: May 2023

To provide the quality of the surface layer and improve operational properties, a combined laser-ultrasonic surface hardening and finishing technology of steel products is proposed. This work is devoted to determining the range of rational parameters of laser heat treatment and ultrasonic impact treatment for enhancing the complex hardening process of AISI 1045 steel and AISI D2 steel. Laser surface transformation hardening was carried out with a constant temperature strategy using a fiber laser and scanning optics at a heating temperature of 1200–1,300 °C and a processing speed of 40–140 mm/min. Ultrasonic surface hardening and finishing were performed on technological equipment with an amplitude of ultrasonic vibration of 18 μm and a load of the ultrasonic tool of 50 N. The ultrasonic treatment duration varied from 60 to 180 s. The results showed that laser-ultrasonic treatment leads to an increase in the hardening intensity by more than 200 %, forming a hardening depth of 200–440 μm. Combined treatment leads to a significant increase in wear resistance due to the formation of ultrafine-grained martensitic microstructure with hardness (58–60 HRC5) in the near-surface layer. The combined laser-ultrasonic hardening process control algorithm for surface treatment of structural and tool steels is proposed, limiting the heating temperature, the duration of laser (ultrasonic) exposure, and the vibration amplitudes of the ultrasonic horn. Laser-ultrasonic treatment will allow the formation of a surface layer with a given set of properties, providing increased wear and corrosion resistance. The developed technology can be used for surface hardening and finishing of large-sized steel products in the mechanical engineering industry.
Topology optimization for isotropic elastic materials using honeycomb tessell
Authors: Tran Ngoc-Tien
Published: May 2023

Topology optimization is gaining popularity as a primary tool for engineers in the initial stages of design. Essentially, the design domain is broken down into individual pixels, with the material density of each element or mesh point serving as a design variable. The optimization problem is then tackled through mathematical programming and optimization methods that rely on analytical gradient calculation. In this study, topology optimization using honeycomb tessellation elements is explored. Hexagonal elements have the ability to flexibly connect two adjacent elements. The use of the hexagonal element limits the occurrence of the checkerboard pattern to the finite elements of the quadrilateral standard Lagrangian type. A mathematical model is developed with the objective function being the minimum compliance value of the design domain. The element stiffness matrix is constructed using the strain-displacement matrix and the constitutive matrix, assuming a unit Young's modulus. Additionally, optimal conditions are established using Lagrangian multipliers. Two sensitivity and density filtering filters are employed to increase optimization efficiency, prevent the algorithm from reaching a local optimal state, and speed up convergence. If the suggested filter is employed, the objective function achieves a value of c=173,0293 and convergence is attained after 200 iterations. In contrast, without using the filter, the objective function has a larger value (c=186,7922) and convergence occurs at the 27th iteration. The results are significant for optimizing topology to meet specific boundary condition requirements. This paper proposes a novel approach using a combination of filters to advance topology optimization using hexagonal elements in future applications.
Research of prospects of involving pharmacists in ukraine to help patients trying to quit smoking
Authors: Shuvanova Оlena , Rohulia Olha , Malyi Volodymyr , Piven Olena , Chehrynets Anna
Published: May 2023

The aim. The study aimed to determine the prevalence of tobacco smoking among pharmacy workers in Ukraine, their awareness of the harmfulness of certain types of cigarettes, the attitude of pharmacy managers and pharmacists towards their colleagues’ smoking, as well as the ability of pharmacists to provide effective help in smoking cessation and assessment of prospects for the participation of pharmacists in tobacco smoking control programs if such programs are to be implemented in Ukraine.

Materials and methods. The survey involved 239 employees of Ukrainian pharmacies under the age of 30 working in different regions. According to the geographical structure, the respondents represent 22 regions of Ukraine.

Results. The experience of countries where active assistance to those who want to quit smoking pharmacists are involved suggests that pharmacists' support can help increase adherence to smoking cessation drugs and provide additional behavioural support as an adjunct to pharmacotherapy, which is quite effective. Currently, there are no such programs in Ukraine.

The survey results show that Ukrainian pharmacists under the age of 30 are aware of the dangers of smoking. Most of them assess the level of their training in smoking cessation assistance as sufficient, but they only mean advice on the use of drugs in smoking cessation.

Conclusions. Thus, in order to introduce the services of active support by pharmacists for people trying to quit smoking in Ukraine, it is required to create the necessary conditions for the interest of pharmacies and pharmacists in carrying out this type of activity and the implementation of programs of additional training in methods of active support for people trying to quit smoking
Possibilities to reduce the impact of vfd on the quality of electric power in the networks of enterprises and the cost of its use
Authors: Kachan Yurii , Shram Alexander , Sverhun Artem
Published: May 2023

Purpose. Simulation modeling of internal power supply systems and comparative assessment on its basis of the total distortion coefficients of the sinusoidal voltage curve.
Methodology. Methods of simulating modeling of internal power supply systems. Numerous methods for processing the obtained results. Methods for calculating the discrete Fourier transform.
Findings. To increase the level of automation of technological processes in industrial electrical installations, frequency converters are widely used. Together with all the advantages of using a variable frequency drive, it leads to a distortion of the sinusoidal shape of the voltage graph. The article evaluates the total distortion factor of the sinusoidal voltage curve for two options for constructing an internal network of an industrial enterprise. The proposed solution makes it possible to improve the shape of the voltage curve by reducing the number of non-linear semiconductor elements in the power supply system and reduce the influence of higher harmonic components on the power grid. At the same time, this makes it possible to reduce the cost of using VFD at the enterprise.
Originality. Through experimental research, it has been established that the use of a common rectifier in combination with a common DC bus and individual inverters can reduce the total distortion coefficient of the sinusoidal voltage curve.
Practical value. The developed simulation models of the workshop network’s operation make it possible to study the indicators of the electric energy quality both in stationary and in transient modes of operation.
ОЦІНКА МЕТОДІВ КЛАСТЕРИЗАЦІЇ РІЗНОТИПОВИХ ДАНИХ
Authors: Ткачик О. А. , Бойко Н. І.
Published: May 2023

Дослідницька робота вивчає взаємозалежність успішності роботи груп навчених суб’єктів від власних характеристик кожного члена групи. Описана можливість прогнозування співпраці окремих спеціалістів у команді в довгостроковій перспективі на основі методів машинного навчання, до яких належать різні моделі кластеризації й відповідні методи кластеризаційного аналізу. Окрім того, поданий алгоритм здобуття аналітичних даних для подальшого їх використання у можливій реалізації сервісу для підбору й групування персоналу та подальших досліджень. У роботі розглянуто декілька основних методів кластеризаційного аналізу. Визначена мета дослідження - оцінка методів та вибір найбільш кращого для дослідження і подальшої кластеризації ознак працівників офісних компаній. Було розглянуто переваги та недоліки основних алгоритмів з урахуванням потреб дослідження. У цьому дослідженні розглянуто потенційні джерела даних, процеси їх обробки та кластеризації обраними алгоритмами. В роботі практично перевірено відповідність обраного методу кластерного аналізу. Для аналізу був обраний FOREL алгоритм, який відповідає вимогам роботи на контрольній групі даних, зручній для наглядного представлення процесу кластеризації. Були оцінені особливості використання різних методів з різною кількістю ознак та обрано метод (k-середніх) для подальшого порівняння з основним підходом (FOREL). Досліджено можливість та доведено використання методів машинного навчання (FOREL, k-means зокрема) для полегшення процесу потреб найму та розподіленню працівників. У роботі був зроблений висновок, що обраний підхід годиться для обширного погляду на формування команд, а не на підгін всіх працівників під команду певного розміру (хоча це теж є можливим). Використання даного алгоритму може бути корисним і при доукомплектуванні команд. Для цього необхідно лиш розширити вибірку досліджуваних даних вже найманими працівниками зі своїми командами і оцінити, в якій команді “приживеться” потенційний командний гравець.
Monogenic functions and harmonic vectors
Authors: Plaksa Sergiy
Published: May 2023

We consider special topological vector spaces with a commutative multiplication for some of elements of the spaces and monogenic functions taking values in these spaces.Monogenic functions are understood as continuous and differentiable in the sense of G\^ateaux functions.We describe relations between the mentioned monogenic functions and harmonic vectors in the three-dimensional real space and establish sufficient conditions for infinite monogeneity of functions. Unlike the classical complex analysis, it is done in the case where the validity of the Cauchy integral formula for monogenic functions remains an open problem.
Features of the Implementation of technological Solutions of the Bridge Crossing Construction Project with a Temporary Bridge
Authors: Ostapenko I. S
Published: May 2023

Purpose. The main aim of the research is the study of the methodology of conducting engineering and technical reconnaissance and the implementation of structural and technological solutions for the project of the construction of a bridge crossing with a temporary bridge damaged as a result of hostilities. Methodology. The achievement of the set goal involves research and analysis of practical structural and technological solutions for construction works, restoration of bridge crossings with temporary bridges, as well as study and generalization of practical experience of implemented technological solutions of combining wooden typical structures with steel typical span structures. Findings. A generalization of the experience of conducting engineering and technical reconnaissance in construction areas, restoration of bridge crossings in de-occupied territories was generalized. The author revealed and clarified the general key stages of the implementation of technological solutions for the project of the construction of a bridge crossing with a temporary bridge damaged as a result of hostilities using a combination of steel inventory bridge structures with wooden bridge structures. Originality. For the first time, the author investigated the peculiarities of conducting engineering and technical reconnaissance in order to implement the obtained results in the relevant project documentation for the construction of a temporary bridge. The peculiarities of constructive and technological solutions with a rational combination of various materials and structures during the construction of temporary bridges, which ensure a long period of their operation, are considered. Practical value. The elements of the methodology of organization and carrying out engineering technical exploration of terrain, water obstacles, construction sites and the base of logistics and other measures will contribute to the quality preparation of project documentation for the construction of bridge crossings with temporary bridges. The application peculiarities of non-standard projects of conducting works and structural and technological solutions in the construction of temporary bridges have a number of technological advantages that make it possible to ensure effective restoration of the destroyed combat actions of the bridges in a short time. Some technological methods of combinations of wooden structures and elements with steel carriers of the roadway when building temporary car bridges increase their load capacity.
DOES NEOADJUVANT CHEMORADIOTHERAPY FOR ESOPHAGEAL AND GASTROESOPHAGEAL JUNCTION CANCER PATIENTS AFFECT POSTOPERATIVE OUTCOMES? A STUDY USING THE BECKER TUMOR REGRESSION GRADE SYSTEM AND LYMPH NODE REGRESSION
Authors: Rosário Maria Inês Vaz do , Barbosa José Pedro , Gullo Irene , Barbosa José
Published: May 2023

ABSTRACT BACKGROUND: The effect of neoadjuvant chemoradiotherapy (nCRT) in patients with locally advanced esophageal cancer can be determined by assessing the Becker tumor regression grade in the primary tumor, as well as in lymph nodes. AIMS: The aim of this study was to investigate the anatomopathological changes caused by neoadjuvant chemoradiotherapy and their impact on clinical parameters. Specifically, we analyzed the Becker tumor regression grade, lymph node status, and regression changes and evaluated their association with the Clavien-Dindo classification of surgical complications and overall patient survival. METHODS: This is a retrospective and observational study including 139 patients diagnosed with adenocarcinoma or squamous cell carcinoma of the esophagus and treated with either neoadjuvant chemoradiotherapy followed by surgery or surgery alone. For the 94 patients who underwent neoadjuvant chemoradiotherapy, we evaluated tumor regression by Becker tumor regression grade in primary tumors. We also analyzed lymph node status and regression changes on lymph nodes with or without metastases. Overall survival analysis was performed using Kaplan-Meier curves. RESULTS: Becker tumor regression grade is associated with lower lymphatic permeation (p<0.01) and vascular invasion (p<0.001), but not with lymph node regression rate (p=0.10). Clavien-Dindo classification was associated neither with lymph node regression rate (odds ratio=0.784, p=0.795) nor with tumor regression grade (p=0.68). Patients who presented with lymphatic permeation and vascular invasion had statistically significantly lower median survival (17 vs. 30 months, p=0.006 for lymphatic permeation, and 14 vs. 29 months, p=0.024 for vascular invasion). CONCLUSION: In our series, we were unable to demonstrate an association between Becker tumor regression grade and lymph node regression rate with any postoperative complications. Patients with lower lymphatic permeation and vascular invasion have higher overall survival, correlating with a better response in the Becker tumor regression grade system.
A Modelagem Torna o Ensino e a Aprendizagem de Matemática Significativos: descontinuidades históricas
Authors: Magnus Maria Carolina Machado
Published: May 2023

Resumo O presente artigo tem por objetivo analisar as descontinuidades históricas de um enunciado que foi se constituindo como uma das verdades quase inquestionáveis: a Modelagem Matemática torna o ensino e a aprendizagem de Matemática mais significativos. Os aportes teórico-metodológicos estão vinculados às teorizações do filósofo Michel Foucault. O material analítico abrange teses e dissertações defendidas no período de 1987 até 2021. A análise do material dá visibilidade à realidade dos/as estudantes como central para a discussão em torno de um processo de ensino e aprendizagem significativos. Porém, há descontinuidade discursiva na centralidade da realidade. Até a década de 1990, a realidade era utilizada para a motivação e aprendizagem significativa dos conteúdos matemáticos. Após 1990, a realidade tem por objetivo formar sujeitos críticos e reflexivos.
Reconhecimento, Redistribuição e Participação: políticas para uma Educação Matemática em tempos de união e reconstrução
Authors: Fernandes Filipe Santos , Fonseca Maria da Conceição Ferreira Reis
Published: May 2023

Resumo Este texto apresenta uma reflexão sobre contextos, demandas, desafios e anseios que fundamentam expectativas e compromissos de uma Educação Matemática em tempos de união e reconstrução, lema do Governo Federal que se inicia neste ano, 2023, sob o comando do presidente Luiz Inácio Lula da Silva. Apontamos expectativas e compromissos com a promoção de políticas de reconhecimento, de redistribuição e de participação que esperamos assumidas pelo atual Governo. Tais políticas, todavia, demandam e fomentam o engajamento de nossas práticas à justiça social e à construção de um sistema educacional inclusivo, laico, socialmente responsável e atento às possibilidades de ser e de vir a ser de diferentes sujeitos e coletivos sociais que compõem a população de nosso país. Esperamos, assim, que possamos seguir sem soltar a mão de ninguém, olhando para frente, para os lados e para trás, sem hesitar ao dizer: nunca mais!
Reimagining Inclusion in Early Childhood Care and Education: A Posthuman Perspective
Authors: Mahadew Ashnie
Published: May 2023

Despite global and national imperatives to build an inclusive society, incidences of discrimination on the basis of numerous marginalised identity markers are widely reported. The early years are an ideal moment for children to form initial attitudes towards different groups of people. In fact, the early years are regarded as a means for social and economic transformation, according to the South African National Development Plan. This article is a segment of a study on a group of early childhood care and education teachers and teacher trainers who explored inclusion using a participatory action learning and action research design. Eight members formed an action learning set and engaged in mutual and collaborative learning to transform their learning environments to become more inclusive. Data were generated in two iterative cycles using a baseline questionnaire, reflective journals, and purposeful conversations. Underpinned by the posthumanist perspective, the findings highlight that diversity needs to be regarded as a strength to be valued, rather than as an impediment. The findings also suggest the need for collectivism in opposition to individualism, and a reconfiguration of the child's identity as posthuman. The study thus contributes to positive outcomes by identifying ways to transform early learning environments to become more inclusive. This not only leads to a more democratic and socially just learning environment but also contributes to wider positive societal change.
Análise narrativa e investigação qualitativa em Psicologia: porquê e como fazer
Authors: Conde Rita , Souto Teresa
Published: May 2023

INTRODUÇÃO: As metodologias qualitativas têm assumido maior relevância na investigação em Psicologia, identificando-se uma grande diversidade de métodos de análise. No entanto, na sua maioria, os estudos recorrem a métodos que têm as suas raízes noutras áreas. A análise narrativa, sendo um método de investigação qualitativa que emergiu e mais diretamente se relaciona com a área da Psicologia, tende a ser menos utilizada. Verifica-se uma grande variabilidade na forma como é conceptualizada e nos procedimentos adotados. OBJETIVO: Procura-se clarificar o background teórico subjacente à análise narrativa na investigação em psicologia e apresentar uma proposta fundamentada de como fazer análise narrativa. MÉTODO: O trabalho decorre da revisão e análise crítica da investigação e bibliográfica. RESULTADOS:  A análise narrativa assenta nos princípios da psicologia narrativa, implicando que a análise narrativa na investigação em psicologia se situa no paradigma construcionista social. Descreve-se detalhadamente as etapas e os procedimentos a adotar para se efetuar a análise narrativa na investigação em psicologia, bem como as estratégias de validação. CONCLUSÃO: Há que começar a privilegiar a análise narrativa como método de investigação qualitativa em psicologia, sendo necessário que os investigadores adotem procedimentos comuns assentes nos princípios da psicologia narrativa.
3 Boyutlu yazıcı kullanılarak üretilen sandviç kompozitlerin düşük hızda darbe performanslarının araştırılması
Authors: KAVELOĞLU Serdar , TEMİZ Şemsettin
Published: May 2023

Bal peteği sandviç kompozitler birçok sektörde yaygın olarak kullanılmaktadır. Sandviç kompozitlerin kullanım amaçlarına uygun karşılaşabileceği düşük hızdaki darbelerden kaynaklanan darbe dayanımlarının tespit edilmesi önem arz etmektedir. Bu çalışmada üç farklı hücre genişliği ve hücre duvar kalınlığındaki bal peteği geometrileri kullanılarak 3 boyutlu yazıcıda polilaktik asit (PLA) filamentten üretilen çekirdeklerin alt ve üst yüzeyleri karbon fiber takviyeli kompozit plakalarla (CFRP) yapıştırıcı ile birleştirilen sandviç kompozitlerin düşük hızda darbe performansları araştırılmıştır. Çalışmada üç farklı hücre genişliği ve hücre duvar kalınlığı sırasıyla 6_0,8mm, 9_1,2mm ve 12_1,6mm ölçülerindeki bal peteği geometrileri kullanılmıştır. Düşük hızda darbeye maruz bırakılan numunelerde eşit yüzey alanı elde etmek amacıyla hem hücre genişliği hem de hücre duvar kalınlıkları artırılarak bu ölçüler tercih edilmiştir. Her bir geometrideki ölçülerde üretilen bal peteği sandviç kompozit numunelere beş farklı enerji seviyelerinde (30J, 40J, 60J, 80J ve 100J) düşük hızda darbe testleri uygulanmış, 100J darbe enerjisinde sandviç kompozitler tamamen delinmiştir. Birbirine yakın yüzey alanına sahip üç farklı hücre genişliği ve hücre duvar kalınlığındaki sandviç kompozitlerin darbeye karşı benzer performans gösterdiği tespit edilmiştir.
Mekanik buhar sıkıştırmalı soğutma sisteminde R134a, R1234yf, R450A, R513A ve R515B kullanımının termodinamik analizi
Authors: BİLEN Kemal , IŞIK Bilal , DAĞIDIR Kayhan , ARCAKLIOĞLU Erol
Published: May 2023

Buhar Sıkıştırmalı Soğutma Sistemlerinde (BSSS’lerde) iş akışkanı olarak kullanılan R134a, küresel ısınmaya karşı alınan tedbirler kapsamında kullanımına son verilmesi planlanan soğutucu akışkanlardandır. Bu nedenle araştırmacılar, R134a’nın alternatiflerini geliştirmeye yönelmişlerdir. Bu kapsamda bu çalışmada; deneysel veriler yardımıyla mühendislik denklem çözücü (EES) programında geliştirilen teorik bir model aracılığıyla mekanik bir buhar sıkıştırmalı soğutma sisteminde R134a ve alternatifleri R1234yf, R450A, R513A ve R515B soğutucu akışkanlarının kullanımları, Termodinamiğin I. ve II. yasaları bakımından teorik olarak incelenmiştir. Analizler, sabit soğutma yükü için çeşitli buharlaşma ve yoğuşma sıcaklıklarında gerçekleştirilmiştir. Analizler sonucunda; soğutucu akışkan türünün, kompresör gücüne, yoğuşturucudan birim zamandaki ısı geçiş miktarına, soğutma tesir katsayısına (COP’ye), ikinci yasa verimine ve soğutucu akışkanın kütlesel debisine etkisi tespit edilmiştir. Çalışmada, R134a ve alternatiflerine ilişkin aynı şartlarda elde edilen sonuçlar karşılaştırılmıştır. Sonuç olarak; kompresör gücünün R134a’ya göre, R1234yf’de %5,62, R450A’da %2,35, R513A’da %3,41, R515B’de ise %2,88 oranında arttığı tespit edilmiştir. Böylece, R134a yerine R1234yf, R450A, R513A ve R515B kullanıldığında, COP’de sırasıyla %5,32, %2,30, %3,30 ve %2,80 oranlarında azalma olduğu görülmüştür. Benzer şekilde, R1234yf, R450A, R513A ve R515B’nin kullanılmasıyla ikinci yasa veriminde R134a’ya kıyasla sırasıyla, %5,32, %2,30, %3,29 ve %2,80 bir azalma tespit edilmiştir. Böylece, hem COP hem de ikinci yasa verimi bakımından R134a’ya en yakın soğutucu akışkanın R450A olduğu belirlenmiştir.
A review of hearing impairment due to bacterial meningitis in children: importance of early
diagnosis and treatment
Authors: Rusinowska Barbara , Tybulczuk Balbina
Published: May 2023

This review underlines the significant role of early diagnosis and treatment of hearing impairment due to bacterial meningitis (BM) in children.
BM is a life-threatening neurological condition mostly caused by Streptococcus pneumoniae, Neisseria meningitides, or Haemophilus influenzae. Hearing loss is the most commonly reported neurological complication of BM; inflammation can damage the inner ear, leading to sensorineural hearing loss or complete deafness. Factors favoring neurological complications, including hearing impairment, are low age, immaturity of the immune system, poor health, anaemia, leukocytosis, and hypoglycemia. To avoid serious complications, quick intervention is necessary – administration of antibiotic in combination with dexamethasone. It is also important to conduct regular audiological tests to monitor hearing, not only immediately after BM, but also in the long term. Otoacoustic emissions (OAEs) and auditory brainstem responses (ABRs) are useful tools, and some researchers also recommend tympanometry. CTs and MRIs are important to visualize the condition of the inner ear after BM, paving the way for qualification for implantation and for pre-operative planning. The best results of implantation come from patients without ossification, whose period of deafness was short, where electrodes were inserted deeply, and who did not have neurological complications after BM. Early implantation is the best option as it promotes proper speech development and allows the child to adapt to their environment.
An exploratory study of nurses' knowledge, skill, and training requirements for newborn hearing screening in a public-sector program in South India
Authors: Keerthi S Santhana , Ramkumar Vidya , Kumar Shuba , Anand Sheeba
Published: May 2023

Background

A pilot newborn hearing screening (NHS) program was established at 11 Corporation Maternity Hospitals in Chennai, a city in South India, to aid in the early detection of hearing loss. Nurses were trained how to screen newborns using both otoacoustic emissions (OAEs) and automated auditory brainstem responses (AABRs). The purpose of this qualitative study was to explore nurses’ perceptions of the NHS program and the challenges they faced in implementing it.

Material and methods

Semi-structured interviews were conducted with 11 nurses, one from each hospital, who performed NHS in Corporation Maternity Hospitals. Interviews were conducted using guides and probes developed and validated by experts.

Results

Four general themes that covered the nurses’ responses were identified: their understanding of NHS and skills in its execution; gaps in their understanding of the NHS program, constraints faced in implementing the screening program, and additional needs for support.

Conclusions

Addressing gaps in training needs, providing full documentation, and overcoming poor adherence to NHS protocols would help the program grow. The lessons learnt are also transferable to programs conducted in similar low–middle income countries.
Modeling and Identification Method of Bolt Loosening of Joint Surface under Axial Tension of Multistage Disk-Drum Rotor
Authors: Yue Cong , Zheng Xiangmin , Wang Chaoge , Liu Hao , Chen Hu
Published: May 2023

Individual bolt at key connection positions is prone to loose when the engine is cycle-operating under complex loads. A joint surface equivalent stiffness model is derived and developed based on the connection characteristics of bolt screwing in the multi-exciting environment of the high pressure rotor. The model is used to analyze the effect of bolt missing at circumferential positions with the equivalent stiffness loss. Vibration experiments under both axial force and lateral impact were carried out to obtain the dynamic response feature of the multistage disk-drum simulated rotor with missing one bolt at different positions. The Spearman correlation coefficient was applied to evaluate the identification effect of different measuring points on the bolt loosening position. The study shows that the eigenfrequencies of experimental results have a consistent trend with the equivalent stiffness variation caused by single bolt missing model. This method also provides a theoretical basis for the detection of bolt deviation position with multi-exciting vibration detection.
Ensayos al filo del desarraigo
Authors:   Universidad de Antioquia, Escobar Mesa Augusto
Published: May 2023

En Ensayos al filo del desarraigo, Augusto Escobar mesa nos presenta sus análisis de tres obras colombianas sobresalientes por sus propuestas estéticas y por el tratamiento de temas cruciales para el contexto histórico colombiano cuando fueron publicadas: de María Helena Uribe "Reptil en el tiempo", de César Uribe Piedrahíta "Mancha de aceite", y de Arturo Echeverry Mejía "El hombre de Talara", novelas que a pesar del paso del tiempo mantienen vigencia. En la primera, el sentimiento de culpa y la búsqueda de redención cobran protagonismo en una mujer formada en una familia católica y conservadora, pero agobiada por el sentimiento de culpa, mientras que en las obras de Uribe Piedrahíta y Echeverry Mejía, los conflictos sociales atraviesan las vidas de sus protagonistas, empujados a la lucha por la supervivencia, n un entorno donde la naturaleza también está amenazada. El volumen lo cierra una reflexión en torno a la novela histórica como "un cabalgar entre la historia y la ficción".
Presentación
Authors: Rojas-Mora Sneider
Published: May 2023

El Boletín de Antropología de la Universidad de Antioquia es un órgano de difusión científica del Departamento de Antropología de la Universidad de Antioquia. Hoy tenemos el gusto de presentar la edición 56, segundo número del volumen 33 (2018), en el que contamos con un importante dossier coordinado por los profesores José Luis Pérez Flórez e Ivy Alana Rieger. Este número temático está dedicado a las memorias histórica y arqueológica de las comunidades indígenas que ocuparon buena parte del territorio americano durante los primeros siglos del cruento contacto entre europeos (domeñadores) y las poblaciones indígenas (resistentes). En este sentido, y no sin razón, es necesario recordar aquella sentencia que suele mencionar que el “pasado nos divide y que sólo el futuro y el destino común puede reconciliarnos”. No obstante, y atendiendo los difíciles momentos que se viven en nuestra América, en general, y en Colombia, en particular, es necesario señalar que, si bien ese pasado nos divide debido a la manera en que cada uno de nosotros lo ha vivido, es necesario conocerlo, recordarlo y, sobre todo, aprender del mismo, de tal forma que podamos vivir el presente y proyectarnos hacia un futuro más solidario y justo.
Repensando el concepto de Mesoamérica por medio del análisis antropológico de la materialidad y la memoria cultural
Authors: González Varela Sergio
Published: May 2023

El presente texto hace un análisis del concepto de Mesoamérica a partir de su expresión material como proceso de vinculación con una memoria cultural compartida en constante proceso de transformación. A partir de una revisión de las diferentes perspectivas contemporáneas de la materialidad en la antropología (en especial las efectuadas por Daniel Miller, Tim Ingold, Bruno Latour y Michael Taussig), se propone un acercamiento a los objetos materiales centrado en sus implicaciones temporales de cambio, agencia y permanencia en el diseño de la categoría analítica de Mesoamérica.
Cartografía y memoria en las Relaciones Geográficas de Indias
Authors: Delgado López Enrique
Published: May 2023

En este trabajo se analizará la relación que existe entre la memoria y la cartografía, representada en mapas del corpus de las Relaciones geográficas del siglo xvi. En varios de estos mapas o pinturas coexisten dos tradiciones, la hispánica y la indígena, situación evidenciable por medio de las figuras representadas, así como por los glifos, las líneas y las formas de representar los paisajes. Esta propuesta parte de la idea de que en la cartografía está manifiesta la memoria y que, si bien los mapas del corpus obedecieron a un cuestionario con determinadas circunstancias, es evidente que en la mayoría de ellos quedó una memoria, que el tlacuilo plasmó en el papel por medio de formas prescritas matizadas por su tradición e historia.
La pesca artesanal en el Brazo de Mompox: un debate con la antropología y el conservacionismo
Authors: Silva Vallejo Fabio , Martínez Castiblanco Danny
Published: May 2023

El presente artículo plantea interrogantes frente a lo que significa ser pescador y sobre la práctica de la pesca artesanal o de subsistencia en comunidades de la región Caribe colombiana, específicamente de la región denominada brazo de Mompox. Estos interrogantes reorientan las discusiones socio-antropológicas y conservacionistas que han planteado una mirada esencialista, generalizada, anacrónica y desfavorable de las comunidades de pescadores, específicamente de aquellas que habitan la ribera del río Magdalena y los complejos cenagosos. Es así que el texto presenta una revisión de las conceptualizaciones que se han realizado desde las ciencias sociales sobre la práctica de la pesca artesanal a nivel mundial, continental y regional. Igualmente, presenta un análisis etnográfico de las realidades y los conflictos de los pescadores del brazo de Mompox. Por último, argumenta la importancia de los saberes locales para la comprensión del pescador en relación con su entorno.
Contribuciones a la historia socio-ecológica de la culinaria de Isla Fuerte: la superación de la dualidad naturaleza-cultura a través del análisis de tres preparaciones tradicionales de la comida isleña
Authors: Bernal Restrepo Javier Nicolás , Bernal Guevara Francisco Javier
Published: May 2023

El presente artículo cuestiona la pertinencia de analizar fenómenos como la cocina, desde conceptos separados de naturaleza y cultura. Para esto, se analizarán las relaciones entre los factores culturales y ambientales que le dan vida a tres preparaciones tradicionales representativas de Isla Fuerte, Región Caribe (Colombia). De acuerdo a tal análisis, se propone alimentar el debate sobre la superación de la dualidad entre estos conceptos. Específicamente, en relación a las complejas articu- laciones entre realidades socio-ecológicas necesarias para la obtención, tanto de los ingredientes de los platos como de la conservación de las prácticas y saberes culinarios necesarios de las preparaciones tradicionales. De esta forma, se pretende abrir nuevas fronteras de interacción entre las disciplinas sociales y de las ciencias naturales que creen nuevas perspectivas de análisis y debate sobre el rol que juega la cocina en nuestra cultura, entre otros hechos sociales necesarios de análisis.
cocina ecuménica y la responsabilidad social del alimento: reseña del libro Comer como acto político de Alain Ducasse y Cristian Regouby
Authors: Ramírez Vidal Luis Alfonso
Published: May 2023

Durante las últimas cinco décadas, han aparecido obras –entre libros y artículos de revistas–, que señalan de manera directa la relación que hay entre comer e identidad, comer y cultura, comer e ideología, comer y poder. El libro de Alain Ducasse y el comunicador Christian Regouby, ganador cuatro veces de las afamadas estrellas Michelín, tratan profusamente esta última relación: comer es un acto político (2018).
presencia velada de los hombres-ave en la corporalidad actual de los varones wichí
Authors: Barúa Guadalupe
Published: May 2023

Después de treinta años de trabajo de campo entre los wichí del Chaco noroccidental y de realizar trabajos comparativos con otras comunidades indígenas, hemos estudiado ciertos rasgos de sus ancestros míticos, en su mayoría hombres-aves, que surgen en instancias rituales o de ensueño. En este artículo analizamos la línea divisoria entre humanos y aves, y las metamorfosis sucesivas que han dado origen a los hombres y mujeres actuales. Nuestro principal objetivo es determinar si el aspecto de los antepasados es sólo un recuerdo que emerge en ciertas circunstancias o si, de forma velada, todavía están presentes en los cuerpos masculinos, modelando sus percepciones.
Racismo y afrodescendientes en México: cinco reflexiones para la “deconstrucción” de las nociones de raza y mestizaje
Authors: Velázquez Gutiérrez María Elisa
Published: May 2023

El uso social, pero sobre todo académico, de categorías como raza y mestizaje han contribuido a invisibilizar la importancia de la participación de las poblaciones africanas y afrodescendientes en México. Este artículo reflexiona y cuestiona el uso de estos conceptos, explicando los contextos de la genealogía de estas nociones, así como las características de las experiencias de las personas de origen africano en México; esto para destacar la necesidad de nuevas categorías sociales y analíticas para explicar la participación de dichas poblaciones y las características del racismo que han enfrentado en el pasado y el presente.
¿Cultura de la cartelización empresarial en Colombia?
Authors: Varón Rojas Diego
Published: May 2023

El objetivo de este artículo es el de reflexionar sobre las prácticas de cartelización empresarial desarrolladas por muchas empresas en Colombia. Se centra la mirada desde una antropología de la cooperación, que genere conciencia sobre la aplicación equivoca en contexto de libre competencia. Cooperar es cuestionar las formas de ganar poder, riqueza y prestigio mediante alianzas injustas. Para esto se eligen dos casos de estudio presentados entre los años 2001 y 2016, conocidos con los nombres de “el cartel de los pañales” y “de los cuadernos”. Como ejercicio empírico se consideran prácticas de la antropología en contextos de docencia e investigación sobre aspectos éticos aplicados a la administración y la gestión organizacional.
Piyano Eğitimi Odaklı Mobil Uygulamaların Analizi ve Müzik Öğretmeni Adayları Tarafından Kullanılma Durumları
Authors: ARSLANHAN Ecehan , ONURAY EĞİLMEZ Hatice
Published: May 2023

Araştırmada iOS ve Android işletim sistemlerindeki piyano eğitimi odaklı mobil uygulamaların ad, içerik, amaç, işletim sistemi, dil seçenekleri ve ücret durumu gibi özellikleri ile tespit edilmesi ve bahsi geçen uygulamaların kullanım durumlarının belirlenmesi amaçlanmıştır. Bu amaç doğrultusunda araştırmanın örneklemini Bursa Uludağ Üniversitesi Güzel Sanatlar Eğitimi Bölümü Müzik Eğitimi Anabilim Dalı’nda öğrenim görmekte olan anketi yanıtlamaya istekli 100 öğrenci oluşturmuştur. Araştırmada iOS ve Android işletim sistemlerindeki piyano eğitimi odaklı mobil uygulamaların bazı özelliklerine göre tespit edilmesinde nitel araştırma yöntemlerinden tematik içerik analizi yöntemi kullanılmış, müzik öğretmeni adaylarının kullanım durumunun tespit edilmesi amacıyla ise anket uygulanmıştır. Araştırmanın sonucunda iOS ve Android işletim sistemlerinde “piyano”, “piyano eğitimi” anahtar kelimeleri kullanılarak ulaşılan 35 uygulamanın büyük bir çoğunluğunun iOS işletim sisteminde, eğitim kategorisinde yer aldığı, İngilizce dil seçeneği barındırıyor olduğu ve uygulama içi satın alım kategorisinde yer aldığı bilgilerine ulaşılmıştır. Ayrıca uygulamanın kullanım durumuna yönelik yapılan anket sonuçlarına göre müzik öğretmeni adaylarının büyük çoğunluğunun mobil uygulamaları bazen kullandığı, en sık kullandıkları uygulamanın Garage Band olduğu, piyano odaklı mobil uygulamaları kendileri için kullandıkları ve kısmen faydalı olduğunu düşündükleri sonucuna ulaşılmıştır.
Биоэтика и ее метафилософские затруднения: как экспертизе стать гуманитарной?
Authors: Сергей Шевченко Юрьевич , Лаврентьева Софья Всеволодовна
Published: May 2023

Концептуальные проблемы биоэтики и гуманитарной экспертизы новых биотехнологий рассматриваются как метафилософские затруднения. Авторы указывают на неизбежность возникновения метафизических вопросов при попытках применить сформулированные в общем виде этические принципы к конкретным казусам регулирования новых технологий.Попытки перевода метафизических затруднений в русло эпистемологии или философии языка могут предоставлять демонстративные примеры связей между разными отраслями философского знания и разными философскими тезаурусами. Вопрос о том, что является первой философией (метафизика или этика), может быть замещен вопросом о допустимых способах обоснования наших убеждений или проблемой переводимости (хотя бы следствий) нормативных или метафизических высказываний на физикалистский язык. Подходы к двум замещающим вопросам были развиты в аналитической традиции, благодаря интересу к ним со стороны ключевых фигур Венского кружка. Однако проблема соотношения этики и метафизики все равно подспудно возникает при попытке выработать этические регулятивы развития новых технологий.Так, в рамках этики ответственности Х. Йонаса метафизика трактуется как основание этики. При этом сам философ конструирует метафизические основания исходя из уже обозначенных этических вопросов. Осуществить такое конструирование в гуманитарном и гуманистическом, но не антропоцентрическом ключе, удается благодаря процессуальному подходу к онтологии биологических наук и к формированию нарративной идентичности человека.
Философия на линии фронта: первые уроки новой мировой войны
Authors: Колин Константин Константинович
Published: May 2023

Проведен анализ современной геополитической ситуации, обусловленной военными действиями на Украине и участием в них стран НАТО. Показано, что эту ситуацию следует квалифицировать как начало военной фазы новой гибридной мировой войны, которая ведется странами Запада против России и ее геополитических союзников. Первые уроки этой войны для России и других стран мира должны стать стимулом для радикальных изменений их стратегии во внешней и внутренней политике. При этом первоочередной задачей мирового сообщества является «принуждение к миру» поджигателей новой мировой войны, результатом которой может стать самоуничтожение человечества вследствие использования ядерного оружия.