bluuebunny/crossref_metadata_2025 huggingface dataset:
Antifouling induced by surface wettability of poly(dimethyl siloxane) and its nanocomposites
Authors: He Zhoukun , Wang Na , Yang Xiaochen , Mu Linpeng , Wang Zhuo , Su Jie , Luo Mingdong , Li Junlong , Deng Fei , Lan Xiaorong
Published: May 2023

Antifouling technologies have attracted considerable attention in recent years, as numerous fouling phenomena pertaining to inorganic, organic, bio-, and composite foulants substantially affect daily life. Poly(dimethyl siloxane) (PDMS) has several practical applications; however, it possesses limited resistance to inorganic, organic, or biofoulants such as proteins or bacteria. Among the antifouling strategies reported thus far, antifouling induced by surface wettability (AFISW) is an exceptional strategy with considerable potential. It presents numerous advantages such as a physical working mechanism, eco-friendliness, and facile material fabrication process. To achieve AFISW, PDMS can be modified with several nanomaterials to tune its surface wettability to meet antifouling requirements. This article presents a systematic review of the existing research on AFISW in PDMS to achieve improved antifouling performance. Specifically, we first provide a background on fouling, focusing on the different types of fouling and antifouling mechanisms. Then, we provide a comprehensive review of AFISW based on four types of surface wettability, namely, superhydrophilicity, hydrophilicity, hydrophobicity, and superhydrophobicity. Finally, we discuss suitable AFISW strategies for different types of fouling mechanisms based on PDMS and its nanocomposites. This review will help researchers design and fabricate various polymeric materials and their nanocomposites with tailored surface wettability for AFISW applications.
Economic performance of smallholder soya bean production in Kwara State, Nigeria
Authors: Oyenpemi Lawrence Oluwagbenga , Solaja Sodipe Oluwaseun , Fadeyi Blessing Oluwaseun , Awe Toluwalase Eniola , Ayojimi Wale , Etta-Oyong Stephen Otu , Okonta Omebere Winifred , Oriade Opeyemi Abosede
Published: May 2023

Soya bean occupies a crucial space in solving the problem of poverty and food insecurity in sub-Saharan Africa (SSA), given the status of the crop as a multipurpose crop. Despite the enormous importance of this crop, the production is still very low in SSA, particularly in Nigeria. This study, therefore, examines the performance of soya bean production using technical efficiency as a yardstick for measuring performance. Primary data were collected with the aid of a structured questionnaire and scheduled interview from 100 soya bean farmers selected using a purposive sampling technique. The data were analysed using descriptive statistics, profitability analysis, and stochastic frontier analysis. The results reveal that the average age was about 45 years with close to 5 years of farming experience. The average household size in the study area was 5 with a mean farm size of 1.8 hectares. The net farm income was ₦37753.92k, while the average rate of return to investment (return per naira invested) was 1.49. The overall mean technical efficiency score was about 56%. This suggests that farmers are relatively efficient in general. There is, however, a gap to improve their farming operations through adequate training on seeds and agrochemical use because both contribute to their inefficiencies.
Szeged a kultúra városa, akkor miért nem pályázza meg az Európa Kulturális Főváros címet?
Authors:   Pécsi Tudományegyetem, Közgazdaságtudományi Kar, Gazdálkodástani Doktori Iskola, Bíró Csaba , Törőcsik Mária ,   Pécsi Tudományegyetem, Közgazdaságtudományi Kar
Published: May 2023

Since the establishment of the European Capital of Culture award, the applications of two Hungarian cities, Pécs (2010) and Veszprém (2023) have been successful. The main priority of the application is to reflect on the cultural wealth of the member states, as well as to increase the feeling of belonging to the common cultural area and to learn about different cultures. Of course, the title has the effect of increasing the city’s image on the European tourism market, which can contribute to the expansion of the tourism performance of the award-winning city and the wider region, and to the development of its cultural offer. In our study, we do not want to contextualize the award-winning cities, but a large domestic city that has similar values for stakeholders, such as Pécs or Veszprém. To support this, on the one hand, we take as a basis the results of a nationally representative sample of 1,000 people closely related to the topic, related to Szeged, which has not yet been published from this aspect. On the other hand, we will discuss the relevant parts of the professional analyzes completed in 2021 at the request of the Hungarian Tourism Agency in the area of the development of cultural tourism in the tourist area of Szeged and its region. Thirdly, based on the data of the National Tourism Data Supply Centre (NTDSC), we examined the performance of the city of Szeged in 2021 in terms of the main sending market (Germany). The aim of our study is to draw attention to the margin of the successful ECoC application of the city of Veszprém, to a city that, according to public opinion, has a prominent role in terms of cultural values and may even be a suitable candidate for the award in a subsequent tender.
Citizens’ motivation and attitude as potential host volunteers in the preparatory years of the Veszprém-Balaton 2023 European Capital of Culture Programme
Authors:   European Capital of Culture managing expert, Rector’s Office, University of Pannonia, Kruppa-Jakab Éva , Kővári Edit ,   Faculty of Business and Economics, Management Institute, University of Pannonia; European Capital of Culture representative
Published: May 2023

This study is focusing on volunteering as a host in the local tourism industry. The Hungarian city, Veszprém and the Lake Balaton region won the title ‘Veszprém-Balaton 2023 European Capital of Culture’ (hereinafter VEB2023 ECoC) in 2018. Creating and managing an effective volunteer programme is one of the keys to the success of an ECoC project. The research aims to uncover the motivations and willingness of Veszprém citizens as potential host volunteers and their interest in the VEB2023 ECoC events during the preparatory years. In 2020, an online and offline survey was conducted to answer the following questions: Are those interested in the proposed ECoC events more likely to volunteer as a host? Are they willing to remain volunteers until and beyond 2023? Does the prestige of VEB 2023 ECoC motivate residents to be host volunteers? In May 2020, a case study was carried out on the opportunities for students of the University of Pannonia in Veszprém to participate in the VEB2023 ECoC programme. The findings and the practical recommendations help to develop a successful, sustainable and smoothly operating volunteering system in Veszprém and its surroundings, and can be beneficial for other future European Capitals of Culture or major event organisers as well.
A student-staff partnership conducting research in higher education: An analysis of student and staff reflections
Authors: Payne Helen , Cantwell James , Bristow Richard
Published: May 2023

This article reports on an analysis of reflections by students and staff following a student-staff partnership which conducted a qualitative exploratory inquiry case study on student mental health in higher education. Following completion of the inquiry, two engaged students and the principal investigator reflected on their experience of the partnership. The analysis resulted in the following categories: a) benefits, b) support for learning, c) motivations, d) impact, e) outputs, and f) limitations. Students learned research skills, enhancements for learning/career and empowerment. Staff experienced an eased ability to conduct research and the rewards of seeing students develop new skills. It is recommended stakeholders in higher education continue to invest in student-staff partnerships in the context of research studies and mental health inquiry to foster opportunities for positive learning outcomes for students, staff, and institutions.
Methods and hardware to accelerate the work of a convolutional neural network
Authors: Tsmots Ivan G. , Berezsky Oleh M. , Berezkyy Mykola O.
Published: May 2023

Three main approaches to building computer systems are analyzed and allocated: software, hardware, and problem-oriented. A problem-oriented approach was chosen for the implementation of CNN. This approach uses a processor core with hardware accelerators that implement basic CNN operations.The development of computer systems for the implementation of CNN should be carried out based on an integrated approach. This approach includes a modern element base, existing hardware, and software for the implementation of the CNN; methods and algorithms for the implementation of CNN; methods, algorithms, and VLSI structure for the implementation of basic operations of the CNN; methods and means of computer-aided design of hardware and software focused on the implementation of CNN computer systems. For the development of computer systems for the implementation of CNN chosen approach, which includes: variable composition of equipment; use of the basis of elementary arithmetic operations; organization of the process of calculating the scalar product as execution single operation; pipeline and spatial parallelism; localization and simplification of links between the steps of the conveyor; coordination of the time of formation of input data and weighting coefficients with the duration of the conveyor cycle. Itis shown that in order to reduce the processing time of large images, it is most expedient to use parallel-stream VLSI -implementation of basic operations. The modified Booth algorithm for forming partial products in a parallel-threaded computing device is selected, which decreased the number of steps in the pipeline. The method of group summation has been improved, which, withmulti-input single-digit adders, combined according to the principle of the Wallace tree, provides a reduction in summation time. The method of parallel-flow calculation of scalar product in a sliding window is developed, which, by coordinating the time of receipt of columns of input data and weighting coefficients with the duration of the conveyor cycle, provides high efficiency of equipment use and calculations in real-time. The main ways regarding coordination of the time of receipt of input data columns and weighting coefficients with the duration of the conveyor stroke of hardware that implement two-dimensional convolution are determined. The hardware structure for the realization of two-dimensional convolution in a sliding window, which is focused on VLSI-implementation with high efficiency of equipment use, has been developed. Programmable logic integrated circuits selected forthe implementation of hardware accelerators. Single-bit 7, 15, and 31 input adders were developed and modeled on the basis of FPGA EP3C16F484 of the Cyclone III family of Altera company, and an 8-input 7-bit adder was synthesized on their basis.
Decompressor for hardware applications
Authors: Romankevych Vitalii O. , Mozghovyi Ivan V. , Serhiienko Pavlo A. , Zacharioudakis Lefteris
Published: May 2023

The use of lossless compression in the application specificcomputersprovides such advantages as minimizedamount of memory, increased bandwidth of interfaces, reducedenergy consumption, and improvedself-testing systems. The article discusses known algorithms of lossless compression with the aim of choosing the most suitable one for implementation in a hardware-software decompressor. Among them, the Lempel-Ziv-Welch (LZW)algorithm makes it possible to perform the associative memory of the decompressor dictionary in the simplest way by using the sequential reading the symbols of the decompressed word. The analysis of the existing hardware implementations of the decompressors showed that the main goal in their development was to increase the bandwidth at the expense of increasing hardware costs and limited functionality. It is proposed to implement the LZW decompressor in a hardware modulebased on a microprocessor core with a specialized instruction set. For this, a processor core with a stack architecture was selected, which is developed by the authors for the tasks of the filegrammaranalyzing. Additional memory block for thedictionary storing and an input buffer which converts the byte stream of the packed file into a sequence of unpacked codes are added to it. The processor core instruction set isadjusted to both speed up decompression and reduce hardware costs. The decompressor is described bythe Very high-speedintegral circuit Hardware Description Language and is implemented in a fieldprogramable gate array (FPGA). At a clock frequency of up to two hundred megahertz,the average throughputof the decompressor is more than ten megabytes per second. Because ofthe hardware and software implementation, an LZW decompressor is developed, which has approximately the same hardware costs as that of the hardware decompressor andhas a lower bandwidth at the costs offlexibility, multifunctionality, which is provided by the processor core software. In particular, a decompressor of the GraphicInterchangeFormat files is implemented on the basis of this device in FPGA for the application of dynamic visualization of patterns on the embedded systemdisplay.
Evaluation metrics systematization for 2D human posesanalysis models
Authors: Antoshchuk Svitlana G. , Breskina Anastasiia A.
Published: May 2023

This paper describes thesystematization of evaluation metrics for 2D human pose analysismodels. Some of the most popular tasks solved using machine learning (ML) methods aredetection, tracking and recognition of human actions for various practical applications. There are a lot of different metrics that allow evaluatingthe model from one pointor another. To evaluate a specific task, a certain set of metrics is used. However, as literature analysis shows, thevast numberof metric definitions, as well as the use of different terms and multiple representations of the same ideas, causesproblems of interpretation and comparison of different ML models and methodsin detecting, tracking,and recognizing human actions.The purpose of this work is to analyze the metrics for evaluating methods for processing 2D human poses in video in order to facilitate the informed choice of the metrics. To improve the objectivity of evaluating the results of empirical studies of existing and newly developed methods and models for detecting, tracking, and recognizing human actions, a systematizationof existing metrics into subgroups was proposed,depending on what task they evaluate. Fourclasses of evaluation metrics were introduced: classificationmetrics, key point’sdetection, object tracking, andgeneral metrics. Classification metrics are based on quality evaluation and matching values from predicted bounding boxes with ground truths. Key point’sdetection metrics are oriented on the quality of found joints of the human bodyskeleton. Tracking metrics evaluate the object detection on each frame and the correctness of determining its trajectory. General metrics are not specifically related to any of the human 2D pose analysis tasks. The prototype of the applicationbasedon suggested metrics systematization, the purpose of which is to help data scientists in formalizing the choice of metrics for evaluating models depending on the ML problem being solved and the application areawas developed. Toevaluate and demonstrate themetrics, that were suggested in thisapplication, Faster R-CNN, SSD and YOLOv3 object detection models wereanalyzed and compared in scope of 2D human pose analysis application area. The results of the analysis showed that Faster R-CNN and YOLOv3 have the most accurate responses, although theyhavethe disadvantage of a high Falsepositive rate. The implementation also showedthatmetrics that based on Truenegative values are uninformativein scope of working with bounding boxes, because of the specific of application areaand inability to calculate Truenegatives on the image data.
Multi-objective optimization of committee selection for hierarchicalByzantine fault tolerance-basedconsensus protocols
Authors: Mazurok Igor Y. , Leonchyk Yevhen Y. , Grybniak Sergii S. , Vorokhta Alisa Y. , Nashyvan Oleksandr S.
Published: May 2023

Decentralized platforms like blockchain have been attracting significant attention in recent years, especially in the contextof financial and payment systems. They are designed to provide a transparent, secure, and reliable environment for digital transactions without the need for a central authority. The core of a decentralized platform like blockchain is a consensus layer that allows all participants (called Workers), whoproperly operate and follow all network protocols and have access to the same stateof the distributed ledger, to coordinate their actions and arrive at the same decisions.However, some Workersmaybe temporarilyoffline at their own discretion, without any confirmation, or their work may be faulty due to technical circumstances, resulting in unpredictable behavior.The goal of this articleis to present an approach for multi-objective optimizing ofByzantine fault tolerance (BFT)-based consensus protocols,to reduce the impact on the network of faultyparticipants. Two criteria were considered –minimization of the number of sent service messages,and maximization of the mathematical expectation of the number of produced blocks.The result isa method to determine the optimal committee size and distribution of Workers,depending on their total number in the network and the expected proportionof Byzantine faultynodes.All protocol amendments presented in this work are tested with corresponding simulation models and have demonstrated notable enhancements in the performance of the system and decreased the load on network nodes. These improvementswill be implemented to the consensus protocol Gozalandia on the Waterfall platform,enhancingits overall reliability, performance, and security. In addition, the presented optimizing algorithm can be applied to a wide range of consensus protocols in blockchains,where blocks mustbe signed by randomly selectedcommitteesto confirmtheir validity.
Fulminant type 1 diabetes developed after influenza split vaccination
Authors: Sawamura Toshitaka , Karashima Shigehiro , Ohmori Ai , Sawada Kei , Aono Daisuke , Kometani Mitsuhiro , Takeda Yoshiyu , Yoneda Takashi
Published: May 2023

Fulminant type 1 diabetes (FT1D) is a subtype of diabetes characterized by rapid progression of β-cell destruction, hyperglycemia, and diabetic ketoacidosis (DKA). The pathogenesis of this disease remains unclear. However, viral infections, HLA genes, and immune checkpoint inhibitor use were reportedly involved in this disease. A 51-year-old Japanese man with no chronic medical condition was admitted to our hospital with complaints of nausea and vomiting. Cough, sore throat, nasal discharge, and diarrhea were not noted. He had a medical history of at least two influenza infections. His vaccination history was notable for receiving an inactive split influenza vaccine 12 days prior to developing these symptoms. He was diagnosed with DKA associated with FT1D. His HLA class II genotypes were nonsusceptible to FT1D, and he had a negative history of immune checkpoint inhibitor use. The destruction of the pancreas by cytotoxic T cells is reported to be involved in FT1D. Inactive split influenza vaccines do not directly activate cytotoxic T cells. However, these could activate the redifferentiation of memory CD8-positive T cells into cytotoxic T cells and induce FT1D, as this patient had a history of influenza infections.

Learning points

Influenza split vaccination could cause fulminant type 1 diabetes (FT1D).

The mechanism of influenza split vaccine-induced FT1D might be through the redifferentiation of CD8-positive memory T cells into cytotoxic T cells.
X-linked hypophosphatemic rickets with advanced bone age treated with aromatase inhibitor
Authors: Felipe Queiroz João , Sader Soraya Lopes , Marques Barroso Carina , Colares Neto Guido de Paula
Published: May 2023

We present an adolescent with X-linked hypophosphatemic rickets (XLH) with bone age advancement and its response to aromatase inhibitors (AIs). A male with XLH, confirmed with a deletion on the PHEX gene, received regular treatment since the first year of life with average growth velocity and height. He had bone age compatible with chronological age until 13 when he had a bone age advancement and a decrease in the predicted final height thought to be due to initiation of oral isotretinoin, which has been previously reported. Then, anastrozole was initiated and maintained concomitant to the rickets treatment for 2 years with bone age stabilization. He had no adverse effects or worsening of bone health markers. As a result, he maintained his height gain and improved his final height Z score compared with the predicted final height at initiating anastrozole. In conclusion, although AIs was a reasonable strategy to stabilize bone age and minimize height impairment, careful monitoring is mandatory to understand its benefits and effects on XLH patients.

Learning points

Although X-linked hypophosphatemic rickets patients have normal puberty, they can be affected by metabolic and environmental factors that may advance their bone age and impair the predicted final height, similar to the general population.

Isotretinoin may accelerate skeletal maturation during puberty in an adolescent with X-linked hypophosphatemic rickets.

Aromatase inhibitors showed to be a reasonable strategy to stabilize bone age and minimize height impairment in an adolescent with X-linked hypophosphatemic rickets.
Unfavorable biological behavior and treatment response of neuroendocrine ovarian metastases of midgut neuroendocrine tumors
Authors: Mulders M C F , de Lussanet de la Sablonière Q G , van Velthuysen M L F , Roes E M , Hofland J , de Herder W W
Published: May 2023

Neuroendocrine ovarian metastases (NOM) predominantly derive from midgut neuroendocrine tumors (NETs) and develop in about 25% of women with advanced stage of this malignancy. Little is known of the growth rate and treatment response of NOM. We therefore evaluated the efficacy of different management options for patients with NOM, including peptide receptor radionuclide therapy (PRRT), somatostatin analogues (SSAs) and oophorectomy. Records were screened for patients with well-differentiated NOM of midgut origin that presented in our NET referral center between 1991 and 2022. Progression-free survival (PFS) and tumor growth rate (TGR) of ovarian and extra-ovarian metastases were determined using RECIST (response evaluation criteria in solid tumors) 1.1. In 12 available patients undergoing PRRT, NOM were associated with a shorter PFS than extra-ovarian metastases (P = 0.003). While PRRT induced a similar decrease in TGR for ovarian and extra-ovarian lesions in nine patients with available data (–2.3 vs –1.4, P > 0.05), only the TGR of NOM remained positive after PRRT. In 16 patients treated with SSAs, the TGR of NOM was almost three times that of extra-ovarian lesions during treatment (2.2 vs 0.8, P = 0.011). Oophorectomy was performed in 46 of the 61 included patients and was significantly associated with a prolonged OS (115 vs 38 months, P < 0.001). This association persisted after propensity score matching and correction for tumor grade and simultaneous tumor debulking. In conclusion, NOM have a higher TGR compared to extra-ovarian metastases, resulting in a shorter PFS after PRRT. Bilateral salpingo-oophorectomy should be considered for postmenopausal women with NOM undergoing surgery for metastatic midgut NETs.
Filosofía de la educación
Authors: Masschelein J.
Published: May 2023

Bajo Palabra, Revista de Filosofía
Arlequín. Una imagen de la subjetividad lúdico-estética
Authors: Diaz S.
Published: May 2023

Con una imagen devaluada en la tradición histórica y científica, forzado a representar el carácter burlesco de las costumbres humanas y confiando al desprestigiado espacio del entretenimiento, el arlequín se presenta como una figura que nos permite abrir un nuevo horizonte conceptual sobre la subjetividad actual. En este sentido, se pretende afirmar que el modo de subjetivación que el arlequín permite presenta las condiciones de existencia de una subjetividad lúdico-estética sostenida bajo el fondo filosófico de las expresiones conceptuales de Nietzsche, Foucault y Deleuze. En efecto, el presente trabajo pretende, por un lado, establecer un breve recorrido por la modernidad y su concepción respecto de la figura del arlequín; y, por otro lado, (a) partir de las especulaciones nitzscheanas para pensar al arlequín como una forma de subjetivación que potencia mediante la risa, el humor y la ironía, las posibilidades de devenir-otro en las configuraciones jerarquizadas y sedimentadas que la sociedad actual fuerza a constituir. Y (b) mostrar que las expresiones que el arlequín permite son propicias para pensar un modo de subjetivación lúdico-estética, bajo el modelo de pensamiento deleuziano, en tanto subjetividad heterogénea que en su multiplicidad autoconstitutiva va forjando espacios de indiscernibilidad, en los que el juego, la risa y la festividad abren nuevas formas de vida.
La primavera P’urhépecha; resistencia y Buen Gobierno en Cherán K’eri
Authors: MANDUJANO ESTRADA Miguel
Published: May 2023

En el presente trabajo presentaremos la experiencia del Municipio de Cherán, México, una comunidad de etnia purépecha que ha conquistado su autonomía a partir de un movimiento de insubordinación ante el Estado y autodefensa frente a las organizaciones del crimen organizado que controlaban la explotación de sus bosques. La relación de estos hechos se presenta como una crítica al concepto tradicional de democracia y al estado de corrupción de un sistema Estatal.
Algebraic theory of measure algebras
Authors: Bezushchak O.O. , Oliynyk B.V.
Published: May 2023

A. Horn and A. Tarski initiated the abstract theory of measure algebras. Independently V. Sushchansky, B. Oliynyk and P. Cameron studied the direct limits of Hamming spaces. In the current paper, we introduce new examples of locally standard measure algebras and complete the classification of countable locally standard measure algebras. Countable unital locally standard measure algebras are in one-to-one correspondence with Steinitz numbers. Given a Steinitz number s such measure algebra is isomorphic to the Boolean algebra of s-periodic sequences of 0 and 1. Nonunital locally standard measure algebras are parametrized by pairs (s, r), where s is a Steinitz number and r is a real number greater or equal to 1. We also show that an arbitrary (not necessarily locally standard) measure algebra is embeddable in a metric ultraproduct of standard Hamming spaces. In other words, an arbitrary measure algebra is sofic.
On the derivations of Leibniz algebras of low dimension
Authors: Kurdachenko L.A. , Semko M.M. , Yashchuk V.S.
Published: May 2023

Let L be an algebra over a field F. Then L is called a left Leibniz algebra if its multiplication operations [×, ×] addition- ally satisfy the so-called left Leibniz identity: [[a,b],c] = [a,[b,c]] – [b,[a,c]] for all elements a, b, c Î L. In this paper, we begin the description of the algebra of derivations of Leibniz algebras having dimension 3. It is clear that the description of the algebra of derivations of all Leibniz algebras, having dimension 3, is quite large. Therefore, in this article, we will focus on the description of the nilpotent Leibniz algebra, whose nilpotency class is 3, and the nilpotent Leibniz algebra, whose center has dimension 2.
Наближений метод визначення змін у витратних характеристиках течії крові у великій коронарній артерії, зумовлених появою її патологічної звитості. Клінічне застосування
Authors: Борисюк А. О. , Себов Д. М.
Published: May 2023

Розроблено наближений метод, який дозволяє кардіологам із прийнятною для них точністю та швидкістю визначати кількісні зміни у витратних характеристиках течії крові у великих коронарних артеріях, що спричиняються появою патологічної звитості останніх, а також встановлювати гемодинамічну значущість цих змін лише за даними відповідної коронарографії. Цей метод пройшов успішну in-vitro перевірку, на основі якої був рекомендований кардіологами до відповідного клінічного застосування. У результаті такого застосування виявлено загальне збільшення/зменшення гемодинамічної значущості патологічної звитості зі збільшенням/зменшенням кількості її завивок. Також встановлено сильну кореляцію між основними геометричними і гемодинамічними характеристиками звитості та основними клінічними показниками відповідних пацієнтів. Це дозволяє говорити про самостійний вплив патологічної звитості великих коронарних артерій на клінічні симптоми відповідних пацієнтів. Іншим важливим результатом клінічного застосування даного методу є одержання критичних значень для кількості завивок, відносного об’ємного зменшення кровотоку і частоти нападів стенокардії, починаючи з яких відповідна патологічна звитість великої коронарної артерії може бути гемодинамічно значущою. Одержані в рамках розробленого методу результати та їх аналіз створюють основу для його подальшого успішного клінічного застосування.
Комп’ютерне моделювання впливу кільцевого включення із функціонально-градієнтного матеріалу на концентрацію напружень навколо кругового отвору у тонких пластинах і циліндричних оболонках
Authors: Гарт Е.Л. , Терьохін Б.І.
Published: May 2023

Проведено комп’ютерне моделювання та скінченноелементний аналіз напружено-деформованого стану тонких пластин і тонкостінних циліндричних оболонок з круговим отвором за наявності оточуючого його кільцевого включення із функціонально-градієнтного матеріалу (ФГМ). Досліджено вплив розмірів ФГМ-включення та закону змінення його модуля пружності на концентрацію параметрів напружено-деформованого стану пластин і оболонок в околі отвору. Отримано поля розподілу інтенсивностей напружень і деформацій пластинчато- оболонкових елементів конструкцій в зонах локальної концентрації напружень. Встановлено, що за використання кільцевого ФГМ-включення з певними механічними властивостями і геометричними параметрами можна зменшити коефіцієнт концентрації напружень і відповідні інтенсивності деформацій в околі отвору більш ніж на 35 %. Закон змінення модуля пружності ФГМ-включення та ширина включення суттєво впливають не тільки на величину концентрації параметрів напружено-деформованого стану пластини та оболонки, а й на характер розподілу напружень по їх поверхнях. Результати проведеної серії широкомасштабних обчислювальних експериментів показують, що використання кільцевого включення із ФГМ дає змогу знизити інтенсивності як напружень, так і деформацій навколо отвору, що відкриває перспективи знаходження раціональних параметрів включень щодо питання максимально можливого зниження локальної концентрації напружень.
Núñez Seixas, Xosé M., Imperios y danzas. Nacionalismo y pluralidad territorial en el fascismo español (1930-1975), Madrid, Marcial Pons, 2023, 307p. ISBN: 9788418752544. 29€
Authors: Rina César
Published: May 2023

Book Review
CD4+CD25+CD127loFOXP3+ cell in food allergy: Does it predict anaphylaxis?
Authors: Erdem Semiha Bahceci , Genel Ferah , Nacaroglu Hikmet Tekin , Karaman Sait , Unsal Karkıner Canan Sule , Sürücü Murat , Can Demet
Published: May 2023

Background: Food allergy (FA), hence the incidence of food anaphylaxis, is a public health problem that has increased in recent years. There are still no biomarkers for patients with FA to predict severe allergic reactions such as anaphylaxis.
Objective: There is limited information on whether regulatory T (Treg) cell levels are a biomarker that predicts clinical severity in cases presenting with FA, and which patients are at a greater risk for anaphylaxis.
Methods: A total of 70 children were included in the study: 25 who had IgE-mediated cow’s milk protein allergy (CMPA) and presented with non-anaphylactic symptoms (FA/A−), 16 who had IgE-mediated CMPA and presented with anaphylaxis (FA/A+) (a total of 41 FA cases), and a control group consisting of 29 children without FA. The study was conducted by performing CD4+CD25+CD127loFOXP3+ cell flow cytometric analysis during resting at least 2 weeks after the elimination diet to FA subjects.
Results: When the FA group was compared with healthy control subjects, CD4+CD25+CD127loFOXP3+ cell rates were found to be significantly lower in the FA group (p < 0.001). When the FA/A− and FA/A+ groups and the control group were compared in terms of CD4+CD25+CD127loFOXP3+ cell ratios, they were significantly lower in the FA/A− and FA/A+ groups compared to the control group (p < 0.001).
Conclusions: Although there was no significant difference between the FA/A+ group and the FA/A− group in terms of CD4+CD25+CD127loFOXP3+ cells, our study is important, as it is the first pediatric study we know to investigate whether CD4+CD25+CD127loFOXP3+ cells in FA predict anaphylaxis.
O neoconservadorismo no movimento carismático católico brasileiro e a resistência ao Concílio Vaticano II: uma análise sociorreligiosa da linguagem
Authors: Almeida André Boccato , Silva Lúcia Eliza Ferreira , Souza Marcelo Henrique de
Published: May 2023

O artigo analisa o neoconservadorismo católico brasileiro e a resistência ao Concílio Vaticano II, a partir da chave sociorreligiosa da linguagem dos novos movimentos laicais. A contar da perspectiva sócio-teológica, abrangerá uma retomada da linguagem plural, proveniente da concepção de diálogo e recepção do mundo moderno. Atualmente, impõe-se um ethos de resistência à abertura teológica conciliar, contudo, no interior de alguns movimentos laicais de grande influência e capilarizarão no catolicismo brasileiro, onde sobrevive uma orientação neoconservadora. Esta proposta será desdobrada em três momentos, no primeiro, resgatará perspectivas históricas sobre o fenômeno neoconservador católico brasileiro, seguindo da apresentação da linguagem teológica própria do Vaticano II, concluindo pela análise das influências sociorreligiosas da linguagem neoconservadora presentes em alguns movimentos laicais.
EFFECTS OF RADIATION AND CHEMICAL REACTION ON MHD CASSON NANOFLUID FLOW PAST A POROUS STRETCHING SURFACE
Authors: Humane Pooja P. , Patil Vishwambhar S. , Patil Amar B.
Published: May 2023

The present investigation aims to study the influence of thermal radiation and chemical reaction on the unsteady magnetized flow of Casson fluid with immersed nanoparticles. The flow is past a permeable stretching surface. The nanofluid heat transmission characteristics are described with the Buongiorno model. The governing system of non-linear partial differential equations (PDEs) is converted into non-linear ordinary differential equations (ODEs) with a similarity group of transformations. The reduced ODEs are numerically solved with an effective shooting strategy along with the standard R-K fourth-order method. The graphical illustration for the immerging parameters on non-dimensional velocity, temperature, and concentration is obtained through bvp4c using MATLAB. The code validation is provided by comparing the numerical outcomes of a few parameters with recently published work. The result shows that the thermal radiation boosts the energy supply in the flow field, and hence, the thermal regime enhances quickly. Due to the rise in chemical activity and Schmidt number, the concentration profile declines. The flow velocity declines with higher magnetic flux.
Association of Age, Gender, and Site of Implant Placement: An Institution-Based Retrospective Study
Authors: Sri Harini K. , Ahmed Nabeel , Sasanka L. Keerthi
Published: May 2023

Tooth loss is an undesirable condition that leads to functional, esthetic and social damage, having an impact on an individual's quality of life. Dental implants are man-made tooth root replacements that are increasingly used to replace a missing tooth. It is important to gather demographic data in order to take precautions before the possible failures. Hence the objective of this study was to retrospectively determine the association between age, gender, and site of implant placement in patients reporting to a private dental institution. This study was carried out from the data obtained from the case records of 1281 patients who had undergone implant therapy. Chi-square test was applied to see associations of gender, age and implant site. The results show that a maximum number of 348 implants (27.7%) were placed in patients aged between 41-50 years. The patient pool consisted of 705 (55%) females and 576 (45%) males. A maximum of 228 implants (17.80%) were placed in region 46 and 224 implants (17.49%) in region 36. Only 2 implants (0.2%) were placed in region 41. There was a positive association between age, gender and site of implant. In those aged 20-30 years, 20.53% of implants were placed, 26.23% in 31-40 years, 27.1% in 41-50 years, 17.95% in 51-60 years and 8.11% in 61-70 years of age. In male, a maximum of 124 implants (54.4%) were placed in region 46 and only 1 implant (50%) in region 41. In females, region 36 had a maximum of 110 implants (49.1%), and the least number of implants were placed in regions 31 and 41. In this study, it can be concluded that general factors such as age and gender had a significant effect on the site of implant placement.
RILEM TC 277-LHS report: How hot are hot-lime-mixed mortars? A review
Authors: Pavia S. , Veiga R. , Hughes J. , Pesce G. , Valek J. , Alvarez J. I. , Faria P. , Padovnik A.
Published: May 2023

It is believed that many historic mortars were made using hot-lime mixing techniques. They are back in use today, and their good qualities are often praised, including being more compatible and a better match with historic fabrics. This paper studies the methods of producing hot-lime mortars and putties. It discusses the variables that determine the properties of the resultant mortars such as slaking and calcination, and compares hot-lime mortars with their equivalent putties, and with factory-produced calcium lime and hydraulic lime mortars. The paper concludes that the most important variable that governs the properties of hot-lime mixed mortars is the quantity of water used for slaking, because it determines the temperature reached during slaking which makes the resultant Ca(OH)2 vary from a fairly large size to extremely small, hence producing mortars with different properties. Based on scientific and historic evidence, it is concluded that the best method for hot-lime mixing is dry-slaking (sand-slaking) with long storage, because it combines a high slaking temperature (that reduces particle size and increases the surface area of the hydrate), with gradual slaking (that lowers volume expansion and crack development) and long storage (to ensure complete slaking hence no expansion cracks). Many historic mortars were probably hot-lime mixed. However, it is practically impossible to recreate them today due to the different limestones, kilns, calcination regimes and slaking/storage methods used in the past. Hydraulic and magnesian quicklimes were used historically for hot-mixing. In contrast, most of the factory quicklimes used today are purer limes with higher free lime content and a greater reactivity. Therefore, a hot-lime mix made with a factory-produced quicklime may not be more authentic or compatible than a natural hydraulic lime –NHL– mortar designed to suit a specific fabric and application. To ensure quality mortars that can be consistently repeated, a hot-lime mixing specification should contain both the process and the materials including: type of slaking (dry/wet); amount of water used; mixing details and the time at which it takes place; storage time and at what stage does it occur. To control the slaking temperature, the right amount of water should be established (according to free lime content) by trial which will also inform on the amount of yield and hence allow proportioning. With careful site work and specification, high-quality, compatible mortars can be made with both NHLs and hot-lime mixing. However hot-lime mixing requires more time and logistics, closer care and a more complicated specification.
Pavement surface distress evaluation using a terrestrial laser scanner
Authors: Ahmed Sarfaraz , Vedagiri Perumal , Kakade Vijay , Krishna Rao Kurra Venkata
Published: May 2023

The accurate measurement of pavement distresses is essential for setting preservation and rehabilitation priorities. The manual measurement of surface distresses is the most commonly used method for evaluating the severity of pavement distresses. However, the manual method has low accuracy and consistency. Thus, in the present study, images of different pavement distresses – potholes, cracking, patching and ravelling of selected sections – were captured using a terrestrial laser scanner (TLS). The surface area of these distresses was measured using the Leica Cyclone software. The obtained results were validated by collecting a similar distress pattern at a different location using the same equipment. The measured surface area was executed in a geographic information system platform to develop an automated database for the prioritisation of selected pavement sections of Mumbai City, India for pavement maintenance. It was observed that the TLS technique could be used effectively for safer and more accurate surface distress measurement.
Limit state design of resilient earthquake-resisting systems
Authors: Grigorian Mark , Sedighi Siavash , Mohammadi Hadiseh
Published: May 2023

Sustainable seismic design (SSD) is the first step towards next-generation earthquake engineering. SSD of mixed multiple seismic systems (MMSSs), in which more than one earthquake-resisting structure is used, is a challenging structural engineering issue. Seismic sustainability implies survivability during and after an earthquake, preceded by post-earthquake realignment and repairs (PERR). Purpose-specific MMSSs are ideally suited for SSD. However, contemporary codes address neither the sequences nor the failure mechanisms of the earthquake-resisting structures of MMSSs. The difference between conventional design and SSD is their approach to expected behaviour during and after an earthquake. Earthquakes are natural and dynamic occurrences, whereas PERR is a manual and static process. SSD does not favour unreal detailing or oversimplifying assumptions; it is a multi-faceted effort that involves realistic structural analysis and planned manual operations. In this context, design implies operability with a view to PERR and requires a change from damageability assessment and performance-based seismic design to performance control and reparability-based design, including the development of new analytic tools and purpose-specific details. This article presents graphical solutions and theoretical principles to help achieve practical SSD for MMSSs. These new techniques may be used for practical reliability, economy and environmental protection.
In Memoriam: Edward O'Kane
Authors: O'Kane David , O’Kane Boal Marianne
Published: May 2023

A tribute to the artist Edward (Eddie) O’Kane (1948–2022) – whose Flann O’Brien artworks were exhibited across the world and adorn a series of O’Brien books – written by his children David O’Kane and Marianne O’Kane Boal.
Manipülatif Destekli Üstbilişsel Planlamaya Dayalı Öğrenme Ortamı Tasarımı: Çarpanlar ve Katları Konusu Örneği
Authors: ERDEM Abdurrahim , ÖZTÜRK Mesut
Published: May 2023

Bu çalışma ortaokul 8. sınıf öğrencilerinin çarpanlar ve katları konusunu öğrenmelerinde, üstbilişsel planlamaya dayalı tasarlanan manipülatif destekli öğrenme ortamının değerlendirilmesi amacıyla yapılmıştır. Ortaokul 8. sınıf düzeyindeki 19 öğrencinin katıldığı çalışmada nitel araştırma yöntemlerinden durum çalışması modeli kullanılmıştır. Çalışma sürecinde ilk olarak üstbilişsel planlamaya dayalı sanal ve fiziksel manipülatif destekli bir öğrenme ortamı tasarlanmıştır. Ardından öğrenme ortamına uygun olarak hazırlanan etkinlikler altı haftalık süreçte katılımcılara uygulanmıştır. Uygulama sürecinin bitiminde araştırmacılar tarafından hazırlanan yarı yapılandırılmış görüşme formu yardımıyla görüşmeler yapılarak çalışmanın verileri toplanmıştır. Toplanan verilere içerik analizi yapılmıştır. İçerik analizi sonucunda katılımcıların görüşleri üstbiliş, manipülatif ve öğrenme ortamı temalarını oluşturmuştur. Çalışmada ulaşılan sonuçlar manipülatif destekli üstbilişsel planlamaya dayalı öğrenme ortamında öğrencilerin ilk haftalarda daha çok fiziksel manipülatiflerle çalışmayı, son haftalarda ise daha çok sanal manipülatiflerle çalışmayı tercih ettiğini göstermiştir. Bu nedenle uygulayıcılara üstbilişe dayalı öğrenme ortamlarının sanal manipülatif ve teknoloji etkinlikleriyle desteklenmesi önerilebilir.
Melas esaslı uçucu kül bileşiğinin bitüm ve bitümlü karışımlar üzerindeki etkilerinin laboratuvar testleri ile incelenmesi
Authors: ARSLAN Deniz , GÜRÜ Metin , ÇUBUK Kürşat , ÖZTÜRK Şeyma
Published: May 2023

Bu çalışmada şeker pancarı melası ve uçucu kül kullanılarak laboratuvar ortamında Melas Esaslı Uçucu Kül Bileşiği (MEUKB) olarak isimlendirdiğimiz yeni bir katkı maddesi sentezlenmiştir. 50/70 penetrasyonlu bitüm, % 2 ile % 8 arasında değişen oranlarda MEUKB ile modifiye edilmiştir. MEUKB modifikasyonunun bitüm ve bitümlü karışımlar üzerindeki etkisini değerlendirmek üzere rotasyonal viskozite (RV), dinamik kayma reometresi (DSR), Marshall tasarımları ve Nicholson soyulma testleri uygulanmıştır. Test sonuçlarına göre MEUKB ile bitümün akma ve deformasyon direncinin arttığı tespit edilmiştir. Bitümün tekerlek izi oluşumuna karşı direncinde % 41,7’ye kadar artış hesaplanmıştır. Bitümün % 3 oranında MEUKB ile modifikasyonu sonucunda bitümlü karışımların stabilitesinde % 10,6’ya varan artışlar meydana gelmiştir. Bununla birlikte, agrega-bitüm karışımlarının soyulma direnci % 85-90 seviyesine kadar yükselmiştir.
Spondyloepipheseal dysplasia tarda
Authors: Raisa Altaf , Rabiya Siraj , Ramsha Fatima Qureshi , Uzma Panhwer , Hina Naseer , Khansa Abro
Published: May 2023

Skeletal disorders are common entities that we encounter in our daily practice. Their early diagnosis is key to proper management and genetic counselling. Spondyloepiphyseal dysplasia is one such disorder. It is a genetic bone deformity that affects the spine, proximal epiphysis and pelvis. The disease is either manifested at birth or during adolescence therefore given the terms SED congenita or SED tarda. Patients with SED present with variable features including short height, short neck, club foot, cleft palate, kyphoscoliosis or lordotic abnormalities. We also present a case of an 11-year-old boy who presented to us with complaints of stunted growth and abnormal posture and underwent radiological imaging.
Review on the role of women along the aquaculture value chain in Kenya
Authors: Mercy Chepkirui , Paul Sagwe Orina , Tonny Orina , Cecilia Githukia , Jared Ochingo , Judith Kemunto Achoki
Published: May 2023

Aquaculture is perceived as masculine work in most regions despite several years of women’s involvement in the sector. Women participate in almost all activities of the aquaculture value chain such as pond construction, sorting of seeds, fertilization of ponds, making and mending of fishing gears, fish harvesting, processing, value addition, transport, and marketing. The majority of women engage in aquaculture to earn income and food for the household. Women’s involvement in aquaculture has led to the creation of more job opportunities thus increasing income generation for rural women. Nevertheless, women face several challenges in aquaculture with the most critical one being limited access to income despite their heavy involvement. They also lack limited access to certified seed, high cost of feeds, and collaterals to access credit. The promotion of aquaculture, gender equity, and empowerment of women and youths has been promoted through various initiatives including Sustainable Development Goals and Blue Economy. However, gender discrepancies are still high despite both gender playing fundamental roles in aquaculture development. Therefore, there is a need to promote gender equity as it will lead to recognition of their full potential towards increasing production, productivity, processing, trade, and economic growth.