bluuebunny/crossref_metadata_2025 huggingface dataset:
Level of physical activity of students from the police force academy in Bratislava
Authors: Bujdos Gabriel , Adamčák Štefan , Marko Michal , Kozaňáková Anna
Published: May 2023

Background and Study Aim. A healthy and active lifestyle is becoming one of the most talked topics amongst people from all over the world. Being more physically active has never been more important than today as both jobs and leisure activities are becoming increasingly sedentary. Humans have moved from being very physically active to being less and less active each year. The aim of our study was to find out the degree of satisfaction and the frequency of performing leisure activities among students of the Police Academy in Bratislava, Slovakia.
Material and Methods. For the purpose of our study, we have used a short version of International Physical Activity Questionnaire (IPAQ) that consisted of 7 questions. The survey was attended by 439 students of the Police Academy located in Bratislava, capital of Slovakia. Our study group was divided into two groups according to their gender, the first group consisted of 249 female students and the second o 190 male students. The overall average age of our students of 21.55 years. Our survey was carried out at the end of the summer semester in June 2022. Questionnaire was carried out online and created through Google forms. The results of the questionnaire were later compared based on the participants gender and analysed using homogeneity test of two independent samples, two-sample t-test with equality and inequality of variances and the chi-square test at the level of significance p < 0.01 or p < 0.05.
Results. When compared, male students in general were more active than female students - median of 30 minutes a week. Male students engaged in vigorous intensity physical activity on average more than 15 minutes a week compared to female students. Moderate intensity physical activity difference was even bigger (23,09 minutes a week) in favour of male students, these results have proven to be also statistically significant at the level of significance p < 0.01. Female participants of our study were slightly more active in walking physical activity, 2.92 minutes a week on average, but the difference between our two studied groups have not proven to be statistically significant at the level of significance p < 0.05.
Conclusions. Here in our study, we’ve looked at physical activity, physical activity levels and how much students attending Academy of the Police Force in Bratislava engage in them. By comparing our survey participants to adults from other countries we can conclude that both our male and female participants have shown higher physical activity levels.
Supercritical carbon dioxide-assisted gold metallization of 3D-printed structure and the tensile strength
Authors: Cheng Po-Wei , Kurioka Tomoyuki , Chen Chun-Yi , Chang Tso-Fu Mark , Chiu Wan-Ting , Hosoda Hideki , Takase Kei , Ishihata Hiroshi , Sone Masato
Published: May 2023

Gold metallization of 3D printed polymer structures was conducted by a supercritical carbon dioxide (sc-CO2) assisted electroless plating process. Precursor of the Pd catalyst utilized in this study was palladium bis-hexafluoroacetylacetonate for the high solubility in sc-CO2. A Ni–P layer was first formed on the catalyzed polymer structure as a sacrificial layer for the sequential gold deposition. Electrical resistance of the gold metallized 3D printed structure was 0.15 Ω and slightly increased to 0.18 Ω after a tape adhesion test. The fracture strength was 47.6 MPa for the sample with 45 min of the gold deposition time.

Graphical abstract
SIMULATION OF AMMONIA SPRAY UNDER BOTH NORMAL EVAPORATING AND SUPERHEATED CONDITIONS
Authors: Yi Ping , Fan Junwei , Xie Siyu , Li Tie , Kuang Min , Li Shiyan
Published: May 2023

A predictive three-dimensional Eulerian-Lagrangian framework for ammonia spray is suggested, and its evolution characteristics under both normal evaporating and superheated conditions are unraveled. First, a simplified boundary model considering the effects of superheated fluid behaviors within the nozzle on the injection velocity and angle was proposed. The real vapor-liquid equilibrium theory is applied in the evaporation model to improve the prediction accuracy of the phase change. An explosion model with the homogenous nucleation theory was used to simulate the burst process. Then, the spray experiment for the liquid ammonia under varied conditions was conducted, and the high-speed diffused back illumination and schlieren approaches were adopted to measure the spray evolutions. Following that, the simulation results were verified against the experimental data under both normal evaporating and superheated conditions, and good agreements indicated that the suggested framework was feasible to accurately and efficiently simulate the evolutions and
morphology of ammonia spray. Finally, the transient evolution characteristics of ammonia spray under various conditions were discussed. The heavy cooling effect of ammonia evaporation makes the initial fuel temperature have a notable effect on its spray penetration and expansion.
Properties of agar/cassava starch films manufactured by hot-melt extrusion method
Authors: Faradina Shelly , Sedayu Bakti Berlyanto , Nur Mokhamad , Fransiska Dina , Syamani Firda Aulya
Published: May 2023

Agar/cassava starch bioplastic film preparation using the extrusion technique was carried out to obtain a continuous production method that is more applicable to industrial production practices. Various ratios (w/w) of agar-and-cassava-starch blends were used in the bioplastic film formulations with glycerol as the plasticizer. All the ingredients were compounded using a single-screw extruder at 110°C. The extrudates were dried and chopped into bioplastic resin pellets, followed by hot compression into a film sheet. The bioplastic film samples were tested for their mechanical properties, water sensitivity, biodegradability and chemical structures. In general, the amount of agar in film formulations was prominently associated with superior mechanical properties, such as the tensile strength, elongation at break and water resistance of the samples. On the other hand, cassava starch contributed to faster film degradation in soil and water. These results, in general, could be explained by the inherent properties of each biopolymer constituent and the number of hydroxyl groups (OH) in the chemical structure of each film sample, which was observed by Fourier transform infrared spectroscopy. This investigation showed that agar/cassava starch bioplastic production using the hot-melt extrusion method was promising for further implementation on a commercial production scale.
İŞGÖRENLER TARAFINDAN ALGILANAN AÇIK LİDERLİĞİN YENİLİKÇİ İŞ DAVRANIŞINA ETKİSİNDE YÖNETİCİ DESTEK ALGISININ ARACILIK ROLÜ
Authors: UÇAR Zeki , GÜNDOĞDU Barış
Published: May 2023

Bu araştırmanın amacı işgörenler tarafından algılanan açık liderliğin yenilikçi iş davranışı üzerindeki etkisinde yönetici destek algısının aracılık rolünü araştırmaktır. Amaca yönelik olarak, ilgili literatür kapsamlı olarak incelenmiş ve araştırma model ve hipotezlerini destekleyecek kuramsal çerçeve oluşturulmuştur. Oluşturulan araştırma hipotezlerini test etmek için gerekli olan veri Bitlis ili kamu ve özel sektör çalışanlarından sağlanmıştır. Yapılan analizler sonucunda Algılanan Açık Liderliğin alt boyutlarından olan Merakı Destekleme ve Hesap verebilirlik ve Sosyal Ağların Etkin Kullanımı boyutlarının Yenilikçi İş Davranışı üzerinde anlamlı ve pozitif yönde etkileri tespit edilmiştir. Buna karşın Açık Liderlik alt boyutlarından biri olan Gücün Kabulü ve Sürekli Paylaşımın Yenilikçi İş Davranışı üzerinde anlamlı etkisi izlenmemiştir. Yönetici Destek Algısı’nın aracı değişken olarak analizlere eklenmesi sonucunda ise Sosyal Ağların Etkin Kullanımı boyutunun Yenilikçi İş Davranışı üzerindeki etkisi ortadan kalmış ve Yönetici Destek Algısı üzerinden Yenilikçi İş Davranışı’nı dolaylı olarak etkilediği bir diğer ifadeyle tam aracı rolünde olduğu bulgulanmıştır. Yine analiz sonuçlarında Merakı destekleme ve Hesap Verebilirlik boyutu ile Yenilikçi İş Davranışı ilişkisi üzerinde Yönetici Destek Algısının kısmı aracılık yaptığı bulgulanmıştır.
PANDEMİ GÖLGESİNDE YARATICI ENDÜSTRİLER EKOSİSTEMİ İÇİN KÜLTÜR POLİTİKALARININ ROLÜNÜ YENİDEN DÜŞÜNMEK
Authors: KAYMAS Serhat
Published: May 2023

Bu çalışma; çalışmanın yazıldığı dönem içerisinde üçüncü yılına giren COVID-19 koşulları altında yeni bir kültür politikasının olanak ve sınırlarını Türkiye özelinde tartışmayı amaçlamıştır. Çalışma, bu doğrultuda, karşılaştırmalı siyasa analizi ile kültür politikası analizleri üzerinden alternatif bir dizi siyasa önerisi geliştirmektedir. Bununla birlikte, yaratıcı endüstriler ekosistemi ve geniş bileşenler ağının neo liberalizm ve bilgi toplumu dönüşümlerinin tam da ortak kesitlerinde yeniden keşfedilen doğasının, hiç değilse, kültür politikalarının yeniden ele alınması için önemli bir olanak sunduğu belirtilmelidir. O denli ki, neo liberalizmin hegemonyası altında yaratıcı endüstriler ekosistemi için kültür politikalarından daha çok, endüstriyel politikaların izlenmesinin, hiç değilse, krizler karşısında kırılgan bir ekosistemi oluşturduğu tam da küresel salgın dönemi ile birlikte ortaya çıkmıştır. Bu doğrultuda çalışma içerisinde, odağında Türkiye yaratıcı endüstriler ekosisteminin olduğu bir dizi politika önerisi geliştirilmiştir.
TÜRK SPOR GAZETELERİNDE DEPREM ALGISI: 2023 KAHRAMANMARAŞ DEPREMİ ÖRNEĞİ
Authors: AFACAN Ersin , IŞIK AFACAN Meltem
Published: May 2023

06 Şubat Pazartesi günü önce Kahramanmaraş ilinin Pazarcık ilçesinde 7,7 ve sonra Elbistan ilçesinde 7.6 büyüklüğünde 2 deprem meydana geldi. Bu iki deprem Kahramanmaraş, Osmaniye, Şanlıurfa, Kilis, Adana, Diyarbakır, Adıyaman, Hatay, Malatya ve Gaziantep olmak üzere 10 ilde çok ciddi can ve mal kaybına neden oldu. Bu nedenle Kahramanmaraş depremi sadece Türkiye Cumhuriyeti tarihinin değil, Anadolu tarihinin de gördüğü en ağır doğal ve toplumsal afetlerden biri oldu. Yukarıda adı geçen 10 il Güneydoğu ve Doğu Anadolu Bölgelerinin kentleşme ve sanayileşme açısından en yoğun illerdir. Depremin geniş bir coğrafyayı etkilemesi nedeniyle geçmişte yaşanan diğer depremlere göre halk arasında daha fazla korku ve kaygı meydana gelmiştir. Türkiye gibi sürekli depremlerin yaşandığı bir ülkede deprem ve medya ilişkisi, deprem nedeniyle yaşanılan kaosu, belirsizliği ve tepkileri anlamak açısından önemlidir. Dolayısıyla bu çalışmanın amacı, Kahramanmaraş depremi sonrası yaşanılanlar özelinde Türk spor gazetelerinde deprem algısını irdelemektir. İrdeleme amacı doğrultusunda deprem hakkında Türkiye’de yayımlanan spor gazetelerinde Milli Yas sürecinde çıkan haberlerin içerik analizi yapılmıştır. Çalışmada spor gazetelerinin ilk sayfaları ve manşetleri incelenirken, Graeme Burton’un (1995) yaptığı çalışmada belirlediği haber değerleri ile ilgili alt boyutlar dikkate alınmıştır. Bu alt boyutlar; olumsuzluk, yakınlık, popülerlik, devamlılık, basitlikle ilgili genel değerler, ünlüler ve otoritelerle ilgili içerik değerleri ve dramatize edilebilmesi, çatışma içermesi, insanlarla ilgili olması, gerçeklikle ilgili geliştirim değerleri olmak üzere üç temel başlık altında toplanmaktadır.
How L1-Chinese L2-English learners perceive English front vowels: A phonological account
Authors: Kwon Joy , Starr Glenn
Published: May 2023

Second language acquisition involves readjusting features from one’s L1 onto counterparts in the L2. Learners often face difficulty during this process due to the presence of an already firmly rooted L1 grammar. Furthermore, a learner’s L1 serves to constrain sensitivity to non-native contrasts during the acquisition process. If a learner’s L2 grammar lacks the phonological feature that can differentiate a non-native contrast, then that learner may experience persistent difficulties in representing the L2 sounds as a result. Mandarin learners of English as a second language have to contend with a substantially expanded L2 vowel inventory in the early stages of acquisition, grappling with the addition of pronounced features less prevalent in their L1. In an attempt to account for front vowel acquisition difficulties and possible routes to progress for L1- Mandarin L2-English using a direct transfer approach, this work follows the Toronto School of contrastive phonology which holds that phonological representation is determined primarily through the ordering of contrastive features. We present data from recent phonetic research that catalogues Mandarin learners’ progress in incorporating English front vowels while, at the same time, examining the underlying phonological processes. This serves as the basis for a preliminary model of contrastive hierarchy in language acquisition using elements of a feature geometry paradigm. The model provides a theoretical roadmap showing that, as Mandarin learners progress and gradually incorporate English front vowels into their L2 repository, the learner’s L2 hierarchy evolves through successive stages as contrasts are perceived and categorized.
More than Words: Twitter Chatter and Financial Market Sentiment
Authors: Adams Travis , Ajello Andrea , Silva Diego , Vazquez-Grande Francisco
Published: May 2023

We build a new measure of credit and financial market sentiment using Natural Language Processing on Twitter data. We find that the Twitter Financial Sentiment Index (TFSI) correlates highly with corporate bond spreads and other price- and survey-based measures of financial conditions. We document that overnight Twitter financial sentiment helps predict next day stock market returns. Most notably, we show that the index contains information that helps forecast changes in the U.S. monetary policy stance: a deterioration in Twitter financial sentiment the day ahead of an FOMC statement release predicts the size of restrictive monetary policy shocks. Finally, we document that sentiment worsens in response to an unexpected tightening of monetary policy.
Measuring Job Loss during the Pandemic Recession in Real Time with Twitter Data
Authors: Aizenman Anbar , Brennan Connor M. , Cajner Tomaz , Doniger Cynthia , Williams Jacob
Published: May 2023

We present an indicator of job loss derived from Twitter data, based on a fine-tuned neural network with transfer learning to classify if a tweet is job-loss related or not. We show that our Twitter-based measure of job loss is well-correlated with and predictive of other measures of unemployment available in the official statistics and with the added benefits of real-time availability and daily frequency. These findings are especially strong for the period of the Pandemic Recession, when our Twitter indicator continues to track job loss well but where other real-time measures like unemployment insurance claims provided an imperfect signal of job loss. Additionally, we find that our Twitter job loss indicator provides incremental information in predicting official unemployment flows in a given month beyond what weekly unemployment insurance claims offer.
Quality of Climate Change Extension Services Provided to Smallholder Farmers in Raymond Mhlaba Local Municipality, Eastern Cape Province, South Africa
Authors: Bontsa N.V. , Gwala L. , Ngarava S. , Mdiya L. , Zhou L.
Published: May 2023

The study ascertained the quality of climate change extension service and its determinants for smallholder farmers in Raymond Mhlaba Local Municipality. The study utilised a cross-sectional survey of 100 households obtained through random sampling. Ordered logistic regression was used to analyse the data. Half of the respondents were female, mainly from Dyamala Village. Most respondents were between 50 and 59 years, married with a primary education level, with household sizes of between five and eight. Most of the respondents were unemployed, with the primary source of income being social grants and a monthly income of R2100-R3000. Most of the respondents knew about climate change, especially from other farmers. Respondents had access to extension advisory services, and 80% of them indicated that the extension services were helpful. However, most respondents indicated that the quality of climate change-related extension services was poor. Age, marital status, employment status, knowledge about climate change, and access to the extension were significant factors in the perceived quality of extension services provided. The study concludes that socioeconomic factors affected the perceived quality of extension service. The study recommends improving the accessibility and spread of extension services. There's also a need to enhance extension training to improve the quality of service delivery.
Impact of Extension Services on the Use of Climate Change Coping Strategies for Smallholder Ruminant Livestock Farmers in Raymond Local Municipality, Eastern Cape Province, South Africa
Authors: Mdiya L. , Aliber M. , Ngarava S. , Bontsa N.V. , Zhou L.
Published: May 2023

The study assessed the impact of extension services on the use of climate change coping strategies for livestock farmers in Raymond Local Municipality, Eastern Cape Province, South Africa. The study utilised a cross-sectional survey design with 82 livestock farmers obtained through a purposive sampling method. The study used Propensity Score Matching (PSM) to analyse the data. Most respondents were single females aged 63, with average household sizes of 6, and had primary education, mostly keeping small stock. Climate change was mainly witnessed through changes in rainfall, with 80% of respondents indicating that it is caused by deforestation. The results suggest that access to extension services impacted the extensive utilisation of climate change coping strategies that decreased the livestock numbers at the 10% statistical level. Access to extension appears to limit the available options as coping strategies for climate change resulted in decreased livestock numbers. In conclusion, access to extension has negatively affected the use of various climate change-induced coping strategies for reduced livestock numbers, with no effect on the other coping strategies. Recommendations include retraining extension officers on various climate change coping strategies they can impart to livestock farmers. Also, agricultural climate policy should focus on creating awareness and increasing access to extension services among livestock farmers on climate risk coping strategies to mitigate the impact on rural livestock farmers.
EFFECT OF SOWING DATES ON SEED YIELD, YIELD TRAITS AND OIL CONTENT OF SAFFLOWER IN NORTHWEST TURKEY
Authors: CULPAN Emrullah
Published: May 2023

The aim of this research was to evaluate the impact of variety, location and sowing dates on some yield and quality traits of safflower. The field experiments of this study were carried out in spring season of 2017 and 2018 under ecological conditions of the Suleymanpasa and Malkara districts of Tekirdag. The experiment was laid out as a split plot design based on randomized complete block design with three replications, in which cultivars constituted the main plot with two varieties (Dincer and Balci), and sowing dates constituted the sub-plot with four dates (20 February, 5 March, 20 March and 5 April) in both locations. Results showed that variation in sowing dates had a significant effect on seed yield, oil content and oil yield of safflower variety. The seed yield was significantly affected by the sowing dates and it seriously decreased as sowing time was delayed (418 and 553 kg ha-1 higher in 20 February compared to 5 April in both production year). The highest seed yield was obtained from sowing on February 20 in 2017 and 2018 (1391.89 and 1493.44 kg ha-1, respectively). As a result, because of sowing dates is a crucial factor for seed and oil yield of safflower, sowing should be done as early as possible in the spring.
O EXITOSO CAMINHO DOS ALUNOS COM DEFICIÊNCIA: EXPERIÊNCIAS E PERCEPÇÕES DE PROFESSORES DE UMA ESCOLA ESTADUAL DO RN
Authors: Oliveira Honorato Antonio Edson , Freire da Silva Lidiany , Rocha Barreto Maria Cristina
Published: May 2023

Neste artigo buscamos verificar o que docentes de uma escola pública da rede estadual de ensino do Rio Grande do Norte percebem de suas experiências com alunos com necessidades educacionais especiais (NEEs), matriculados no ensino fundamental. Foram realizadas entrevistas com cinco professoras do ensino fundamental que trabalham na educação especializada de uma escola na cidade de Mossoró. As narrativas das docentes demonstraram o reconhecimento sobre os problemas que a rede pública de ensino ainda enfrenta; as dificuldades são ainda maiores no ensino de alunos com NEEs. Esses problemas são desde os estruturais, como o pouco investimento na infraestrutura escolar e adaptações arquitetônicas, até os atitudinais que refletem negativamente no desenvolvimento e desempenho dos alunos. De modo conclusivo, as professoras ressaltam que ainda há muitas barreiras a serem superadas na educação especializada e inclusiva; porém, defendem que alunos com deficiência podem sim obter êxito escolar, assim como qualquer outro.
UMA ANÁLISE DO PÚBLICO-ALVO OCULTO DA POLÍTICA DE ASSISTÊNCIA ESTUDANTIL DO IFSP CAMPUS BIRIGUI
Authors: Castilho Daniela Galera , Francisco Marcos Vinicius , Silva Michele Oliveira da
Published: May 2023

Esta pesquisa tem como foco a Política de Assistência Estudantil (PAE) do Instituto Federal de Educação Ciência e Tecnologia (IFSP)-Câmpus Birigui. Contraditoriamente, ao mesmo tempo em que a assistência estudantil auxilia a permanência dos/as estudantes que se inscrevem no Programa de Auxílio Permanência (PAP) contemplando a maioria dos/as inscritos/as, há aqueles/as que apesar de se enquadrarem no critério de renda, considerado como prioritário pelo Programa Nacional de Assistência Estudantil, não se inscrevem para o processo seletivo. Diante disso, esse estudo teve como objetivo identificar e analisar o perfil do público-alvo oculto do Programa Nacional de Assistência Estudantil, no IFSP – Campus Birigui, considerando as relações sociais e os motivos que os fizeram permanecer ocultos no Programa. A investigação foi conduzida na perspectiva do método do materialismo histórico-dialético, realizada por meio da análise documental e de pesquisa empírica via aplicação de questionários e entrevistas semiestruturadas. Os resultados revelaram que os motivos do ocultamento vão além da ineficiência dos meios de divulgação do Programa, estão relacionados com as políticas pontuais de acesso, a evasão precoce, a naturalização das carências, a alienação do conhecimento para apropriação e objetivação de bens e serviços, acrescido da responsabilização pessoal por problemas que são estruturais, ou seja, relacionados com as sequelas da desigualdade social que atingem a classe trabalhadora, que tem que priorizar o trabalho e as necessidades básicas de sobrevivência em detrimento de outros direitos, que também são essenciais, tal como a educação.
APLICAÇÃO DO PENSAMENTO COMPUTACIONAL NO ENSINO, UMA REVISÃO SISTEMÁTICA DE LITERATURA
Authors: Francisco de Souza Gilsimar , Tadeu Campos Lopes Paulo
Published: May 2023

Diversos países perceberam a importância de inserir em seus currículos processos e meios de se desenvolver competências e habilidades trabalhando com o Pensamento Computacional (PC). Surgiram, assim, diversas pesquisas nessa área devido a essa importância mundial. O objetivo deste trabalho é, portanto, entender em quais países estão ocorrendo essas pesquisas e quais são as ferramentas que esses estudos usam na aplicação do PC no ensino. A metodologia utilizada foi a revisão sistemática de literatura com viés da proposta PRISMA- Preferred Reporting Items for Systematic Reviews and Meta-Analyses, na qual devem ser seguidos alguns passos, como definir o problema, realizar busca em base de dados, que, neste caso, foram consultados artigos publicados internacionalmente, selecionar da base de dados pesquisada o corpus, analisar o corpus e apresentar os resultados. Dessa forma, os resultados mostram que as publicações de pesquisas em PC aplicados à educação são maiores nos EUA, mas diversos países, como Finlândia, Dinamarca e Índia, também possuem amplas pesquisas nessa área. Outra constatação foi a de que diversos instrumentos são utilizados pelos pesquisadores para atingirem seus resultados, como inteligência artificial, robótica, realidade aumentada, criação de jogos e kits de eletrônica. Por fim, percebe-se que os países estão investindo nessa pesquisas devido à grande abrangência que a tecnologia deve alcançar nos próximos anos, como exemplo cita-se a internet 5G que interligará todas as áreas da vida em sociedade, o que demandará conhecimento de PC para resolver os problemas do futuro bem como suas demandas.
FORMAÇÃO CONTINUADA DE PROFESSORES DA EDUCAÇÃO INFANTIL EM DOIS MUNICÍPIOS DO INTERIOR PAULISTA
Authors: Souza Tatiana Noronha de , Vieira Lindinara
Published: May 2023

Esta pesquisa investiga a formação continuada de professores de educação infantil em dois municípios do estado de São Paulo. Objetivou caracterizar e analisar a formação ofertada, a partir da visão das professoras e das coordenadoras. Trata-se de uma pesquisa de campo que utilizou questionários e entrevistas. A maior parte das participantes é formada em Magistério e Pedagogia, várias indicaram que a formação técnica foi mais relevante que a Pedagogia. Os dados mostraram que as professoras compreendem a relevância da formação continuada, afirmaram, que existe com frequência e, na maioria das vezes, dentro do horário de trabalho. As palestras constituem o formato mais frequente. Em relação à contribuição da formação para as práticas docentes, há uma divergência. Para as professoras do Município A a formação oferecida contribui muito, pois neste grupo poucas possuem cursos de pós-graduação e o plano de carreira não reconhece a evolução funcional por via acadêmica. As professoras do Município B alegam que a formação contribui regularmente, pois não atende às expectativas, neste caso a maioria possui curso de pós-graduação, o que também pode influenciar na avaliação sobre a formação oferecida pelo município. Esse município possui plano de carreira que reconhece evolução funcional por via acadêmica, o que pode responder pela busca de mais cursos de formação. Conclui-se que os municípios possuem um importante papel no desenvolvimento profissional das docentes, e por isso é necessário que tenhamos políticas públicas que deem assessoria técnica de qualidade, a fim de que possam subsidiar com qualidade da formação proposta.
A szegénység csapdái - Időperspektíva és térhasználat mélyszegénységben élő nők habitusában
Authors: Zsinka Flóra
Published: May 2023

A tanulmány egy ormánsági, mélyszegénységben élő nők körében végzett interjús kutatás alapján mutatja be a vizsgált csoport időperspektívájának és térhasználatának sajátosságait. Az írás életútinterjúk és strukturált interjúk segítségével elemzi az önéletrajzi emlékezet reflektáltságát, az időbeliség narratív mintázatait, az időperperspektívát múlt, jelen és jövő távlataiban, valamint a rövid távú időhorizont a mindennapi időstruktúra vonatkozásában. Ezt a térhasználat, a térbeli akciórádiusz és a térreprezentációk vizsgálata követi. A „szegénység kultúrájára” jellemző beszűkült tér- és időperspektívát a habitusban rögzült diszpozíciókként értelmezhetjük. Ez lehetővé teszi azt, hogy az időkezelés és a térhasználat tipikus mintázatait szervező beállítódásokat, kognitív sémákat a társadalmi pozícióból fakadó kényszerekkel, meghatározottságokkal összefüggésben elemezzük. E diszpozíciók strukturáló struktúrákként olyan gyakorlatokat generálnak, amelyek hozzájárulnak a hátrányos helyzet tartós fennmaradásához. Ha a szocializáció szűkös körülmények között megy végbe, és kevés lehetőség adódik az életút tudatos alakítására, akkor az egyrészt ahhoz vezet, hogy az érintettek kevéssé lesznek képesek a múlt eseményeit a jelen perspektívájából mérlegelni, és az életút fordulópontjait tágabb összefüggésekben értelmezni, másrészt nem alakul ki az a képesség sem, amely lehetővé teszi a jövő racionális tervezését. A beszűkülő térhasználatban nem csak a többségi társadalom kirekesztő magatartása és a korlátozott anyagi lehetőségek játszanak szerepet. A társadalmi és fizikai tér viszonyai által is strukturált habitus befolyásolja azt, hogy a cselekvőkre milyen hatással vannak a különböző terek atmoszférái. A vizsgált társadalmi csoport esetében ez a nyilvános terek bizonyos típusaival szemben érzett feszélyezettségben, elidegenedettségben nyilvánul meg. Tehát a tér és idő struktúráit társadalmilag létrehozott, az egyenlőtlen társadalmi viszonyokat visszatükröző és újratermelő valóságokként értelmezhetjük. Az interjúelemzések alapján arra következtethetünk, hogy a mélyülő társadalmi egyenlőtlenségek a tér és az idő dimenzióiban is leképeződnek.
A COVID-19 és a helyi válságkezelés jellemzői Magyarországon
Authors: Baranyai Nóra , Ferencz Zoltán
Published: May 2023

A COVID-19 járvány idején az országok többségében erősödött a kormányzati centralizáció, jóllehet ma már általánossá vált az a vélekedés, hogy a központi válságkezelés nem a legeredményesebb módja a járvány elleni küzdelemnek. A szupercentralizáció hatékonyságát megkérdőjelező szerzők közé tartozik Hambleton (2020), aki a helyi szint felértékelődését, a valódi helyi autonómiát és a helyet jól ismerő, együttműködő (település) vezetőt sorolja a sikeres válságkezelés tényezői közé.
A tanulmány a témában megjelent szakirodalom mellett egy 202 helyi önkormányzatot felölelő empirikus adatfelvétel eredményeire támaszkodva arra keresi a választ, hogy a hambletoni értelemben sikeres válságkezelés szempontjából alapvető fontosságúként azonosított tényezők hogyan jellemezhetők Magyarországon a COVID-19 járványidőszakában. Az elemzés kitér a helyi autonómiát ért kihívásokra, valamint a jó vezetés és a helyi jellegzetességek kérdéskörére, amit a járvány okozta problémák területi különbségei, az eltérő polgármestertípusok és szerepfelfogások, valamint a helyi társadalmi részvétel szempontjából jellemez.
Elemzések rámutatnak, hogy a centralizált vagy túlcentralizált államok nem teljesítettek jól a koronavírus-járvány kezelésében. A tanulmány arra a következtetésre jut, hogy a Hambleton által meghatározott, a sikeres válságkezeléshez szükséges helyi tényezők, illetve feltételek a járvány időszaka alatt hazánkban sérültek, hiányossá váltak, miközben a járvány okozta problémák és a járványkezelés eszközei a meglévő területi különbségek mentén differenciálódtak. A helyi önkormányzatok autonómiája, mozgástere, anyagi lehetőségei szűkültek, s ennek következtében a jó vezetés is ellehetetlenült, holott a legtöbb településvezető helyi politikai és szakmai szereplőkkel együttműködve,(kezdetben) jelentős társadalmi támogatás mellett hozta meg döntéseit, kialakítva a válságkezelés helyi, akár más krízisek során is alkalmazható gyakorlatát, mechanizmusait
Negative Capacitance Phenomenon in GaAs-Based MIS Devices Under Ionizing Radiation
Authors: KAYMAZ Ahmet
Published: May 2023

This study focuses on the abnormal peaks observed in voltage-dependent capacitance graphs and negative capacitance behaviors of the GaAs-based MOS devices for the unirradiated sample and after exposing the device to 5 and 10 kGy ionizing (gamma) radiation doses. Experimental results showed that the amplitude of the abnormal peaks, observed at about 1.75 V, increases with the irradiation dose. The peak point was also shifted toward the positive biases after irradiation. Furthermore, the conductance values increased rapidly and reached their maximum level, while the capacitance values reached their minimum level in the high voltage biases. This situation is directly related to the inductive behavior of the MOS devices. However, it has been determined that the MOS device's inductive behavior is more effective after irradiation. These behaviors can be observed because of the ionization process, the MOS device's series resistance, surface states, and due to some displacement damages caused by ionizing radiation. Therefore, the series resistance and the radiation-induced surface states were obtained to clarify the impact of radiation on the device. It was seen that the radiation-induced surface states changed around 3x1012 for the maximum cumulative dose (10 kGy), and the series resistance values changed less than 2 Ω (it was obtained 8.74 Ω for 0 kGy and 6.82 Ω for 10 kGy). As a result, the degradation in the GaAs-based MOS device was determined to be insignificant for 10 kGy doses. Therefore, this MOS device can be safely used as an electronic component in radiation environments such as nuclear plants and satellite systems.
Sensor and Actuator Fault Tolerant Control of Grid-Tied Microgrid
Authors: KILIÇ Heybet , YİLMAZ Musa
Published: May 2023

The increasing penetration of the distributed energy resources (DERs) in the electrical grid introduces new challenges in terms of grid’s reliable operation. DERs are
connected to the main network at the distribution level, possibly through the microgrid, at the point of common coupling (PCC). Microgrids have often the capability of operation in both grid-tied and islanded modes. In the islanded mode, the generated active and reactive powers must be in equilibrium with the load demand, while in the grid-tied mode, the active and active powers follow the desired references defined by the distribution system operator. Therefore, in both cases, proper control is crucial for the operation of the microgrid and its DERs. In this paper, a fault tolerant control (FTC) method based on H∞ observer is proposed for a DER supplying a grid-tied microgrid to make it resilient against sensor and actuator faults and guarantee its reliable operation.
Prospects for the Development of Open Public Administration and Public Control: Constitutional and Legal View
Authors: Spiridonov A. A.
Published: May 2023

In the study, the author proceeds from the fact that open state and municipal administration as a concept and practice with huge potential is systematically associated with the development of effective mechanisms of public control. A number of conclusions and proposals are suggested for discussion, including the following: 1) implementation of the formats of open state and municipal governance in combination with the evolution of control and supervisory activities, public control gives a synergetic effect and significantly increases the confidence of society, citizens, business in the system of public authorities and their activities; 2) an extremely important role in achieving positive effects and practical results is played by the comprehensive digitalization of control and supervisory activities, state and municipal management in general, which is why this trend needs to be continued, making the relevant technologies and services even more understandable, accessible and convenient; 3) the new philosophy of state and municipal management currently being formed and improved should include effective open administration and organization of control and supervisory activities based on building a full-fledged partner and service model of such activities; this new philosophy should fully embody the evolving ideas of clientcentricity and the key principles of the concept of the «State for the People.» A number of specific proposals have been formulated, including normative ones, aimed at further development of digitalization of public control, including a proposal to study the issue of creating and developing a single portal of public control in the Russian Federation.
Countering Corruption in Organizations: Uncertainty of the Law on Necessary and Sufficient Preventive Measures and the Best Anti-Corruption Practices in Russian Companies
Authors: Tukhvatullin T. A. , Rusetskiy A. E.
Published: May 2023

The paper analyzes the shortcomings of Article 13.3 of the Federal Law «On Combating Corruption» that oblige organizations to take measures to prevent corruption. The legal design of Parts 1 and 2 of Article 13.3 of the Anti-Corruption Law are not coordinated with each other, which makes it difficult to fulfill the requirements laid down by the legislator. In fact, the imperativeness of Part 1 of the article is offset by dispositivity of Part 2, despite the fact that both parts are interrelated in meaning. At the same time, at the stage of law enforcement, both the organizations themselves and the prosecutors overseeing the implementation of anti-corruption legislation by organizations are uncertain about the necessary and sufficient set of the measures that are provided in Part 2 of Article 13.3 of the Anti-Corruption Law. The authors analyze the methods used by Russian organizations to ensure compliance with legislative requirements in the conditions of legal uncertainty of formulations. The paper gives the examples of the best practices in the field of anti-corruption applied in organizations. The authors propose the options for improving the normative and legal regulation of mechanisms for preventing corruption in organizations.
Hypocentral parameters and velocity estimation in the western Swiss Alps by simultaneous inversion of P- and S-wave data
Authors: Maurer Hansruedi , Kradolfer Urs
Published: May 2023

The extraction of tectonic information from seismicity data requires accurate hypocenter locations. Hypocenter and velocity-depth parameters may be obtained by simultaneously inverting P- and S-wave arrival times. The success and efficiency of such an inversion procedure depends on data quality and the suitability of the velocity model representation. To ensure high data quality, a robust outlier detection scheme based on Wadati diagrams has been adopted, and the effects of certain systematic errors and the inclusion of a priori constraints have been investigated. When the true velocity structure includes variable vp/vs ratios, incorporating S-wave data on the assumption of a constant vp/vs ratio may lead to more inaccurate hypocenter determinations than using P-wave data alone. By means of a synthetic example, the benefits of decoupled P- and S-wave models are demonstrated. The simultaneous inversion procedure has been applied to new earthquake travel-time data recorded in the western Swiss Alps. The derived velocity-depth functions provide a reasonable average of the upper crustal structure in the investigation area, and based on accurate hypocenter information, a nearly vertical active fault zone has been confirmed north of the Rhone valley. Markedly different epicenter distribution patterns are observed on either side of the Rhone valley.
The accuracy of seismic estimates of dynamic strains: An evaluation using strainmeter and seismometer data from Piñon Flat observatory, California
Authors: Gomberg Joan , Agnew Duncan
Published: May 2023

The dynamic strains associated with seismic waves may play a significant role in earthquake triggering, hydrological and magmatic changes, earthquake damage, and ground failure. We determine how accurately dynamic strains may be estimated from seismometer data and elastic-wave theory by comparing such estimated strains with strains measured on a three-component long-base strainmeter system at Piñon Flat, California. We quantify the uncertainties and errors through cross-spectral analysis of data from three regional earthquakes (the M0 = 4 × 1017 N-m St. George, Utah; M0 = 4 × 1017 N-m Little Skull Mountain, Nevada; and M0 = 1 × 1019 N-m Northridge, California, events at distances of 470, 345, and 206 km, respectively). Our analysis indicates that in most cases the phase of the estimated strain matches that of the observed strain quite well (to within the uncertainties, which are about ±0.1 to ±0.2 cycles). However, the amplitudes are often systematically off, at levels exceeding the uncertainties (about 20%); in one case, the predicted strain amplitudes are nearly twice those observed. We also observe significant ɛφφ strains (φ = tangential direction), which should be zero theoretically; in the worst case, the rms ɛφφ strain exceeds the other nonzero components. These nonzero ɛφφ strains cannot be caused by deviations of the surface-wave propagation paths from the expected azimuth or by departures from the plane-wave approximation. We believe that distortion of the strain field by topography or material heterogeneities give rise to these complexities.
SELECTION OF MATERIALS BASED ON HYDROXYLAPATITE USING THE METHOD OF ANALYSIS OF HIERARCHY
Authors: PANDA ANTON ,   Technical University of Kosice, Department of Automotive and Manufacturing Technologies, Faculty of Manufacturing Technologies with a seat in Presov, CHERNOBROVCHENKO VADYM , DYADYURA KOSTIANTYN , SUKHODUB LEONID , KUMEDA MARIIA , BEHUN MARCEL ,   Sumy State University, Ministry of Education and  Science of Ukraine,   Odessа Polytechnic National University, Ministry of Education and Science of Ukraine,   Sumy State University, Ministry of Education and  Science of Ukraine,   Sumy State University, Ministry of Education and  Science of Ukraine,   Technical University of Kosice, Department of Automotive and Manufacturing Technologies, Faculty of Manufacturing Technologies with a seat in Presov
Published: May 2023

Biomaterials are artificial or natural materials that replace diseased or damaged bone tissue, recently with increasing interest in interdisciplinary approaches, including e.g. bioengineers. Such materials must be mechanically strong and not cause undesirable reactions. Due to the many factors that need to be considered, choosing the right material becomes a challenge. The relevance of the study lies in the development of a method for choosing a synthetic material based on hydroxyapatite for bone tissue restoration. Hierarchy analysis method was used and a set of five materials and their seven mechanical and biological parameters were analyzed.
COPYRIGHT PROTECTION IN ADDITIVE MANUFACTURING
Authors: NGUYEN HOANG-SY ,   Becamex Business School, Eastern International University, NGUYEN MINH THANH , HAJNYS JIRI , PAGAC MAREK ,   Becamex Business School, Eastern International University,   Department of Machining, Assembly and Engineering Technology, Faculty of Mechanical Engineering, VSB—Technical University of Ostrava,   Department of Machining, Assembly and Engineering Technology, Faculty of Mechanical Engineering, VSB—Technical University of Ostrava
Published: May 2023

Additive Manufacturing (AM) has been proven to be a significant development for production as well as become an attractive alternative manufacturing process compared with Subtractive Manufacturing (SM). This can be explained by the massive advantages of AM including mass customisation, less material wastage and ability to create prototypes. However, in order to make use of the AM process, firms, developers and designers require a virtual sharing platform, which can be used to trade designs and make the whole industry better off. This desire requires ways to protect the models and designs from digital thieves. Moreover, internal transactions of designs inside a single firm also require a significant level of security. So, this paper offers different ways of protecting both physical models and virtual designs. The solutions in this paper can be used to ensure the integrity of the physical products and virtual designs during different kinds of transactions.
RESEARCH TREND IN THE FIELD OF ADDITIVE MANUFACTURING WITH BIBLIOMETRICS STUDY
Authors: NGUYEN HOANG-SY ,   Becamex Business School, Eastern International University, MA QUOC-PHU , HAJNYS JIRI , MESICEK JAKUB , PAGAC MAREK ,   Department of Machining, Assembly and Engineering Technology, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava,   Department of Machining, Assembly and Engineering Technology, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava,   Department of Machining, Assembly and Engineering Technology, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava,   Department of Machining, Assembly and Engineering Technology, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava
Published: May 2023

This paper reviews the current trend in the field of additive manufacturing based on the bibliometrics study. In particular, we assessed the interest of the research community revolving the hybrid material. Scopus database was referred to for the English literature on the hybrid materials in additive manufacturing, published in the time period from 2012 to 2022. As a result, 973 relevant articles were found and studied. Information related to the top journals in which they were published, as well as the topics of the papers were shown. Based solely on the quantitative study, the valuable insights were extracted. Specifically, we report the number of publications over the years, the fields where the publications belong to, the top journals that publish those works, and a network of keywords that are important for such a topic. The paper would serve as a brief and helpful introduction for researchers and practitioners to the current trend of the field.
COMPARISON OF A WATERCOOLER AND OTHER ALTERNATIVES IN TERMS OF THEIR ENVIRONMENTAL IMPACTS USING THE LCA METHOD
Authors: SIMON MICHAL ,   Department of Industrial Engineering and Management, Faculty of Mechanical Engineering, University of West Bohemia in Pilsen, BLACKY TOMAS , ZOUBEK MICHAL ,   Department of Industrial Engineering and Management, Faculty of Mechanical Engineering, University of West Bohemia in Pilsen,   Department of Industrial Engineering and Management, Faculty of Mechanical Engineering, University of West Bohemia in Pilsen
Published: May 2023

The environmental impacts of products are evaluated based on an assessment of the influence of material and energy flows that the evaluated product system exchanges with the environment. The University of Southern Denmark is also dealing with this, and from the point of view of sustainable development, drinking watercoolers are being investigated using the Life Cycle Assessment method. This research conducts a Life Cycle Impact Assessment of drinking water supply systems at a university to determine if they fit the institution's sustainability agenda. In the evaluation, the impact of one beverage delivered from watercoolers is compared with beverages from five benchmarked systems. These systems are tap water, ice-chilled water, bottled water, soft drinks and hot drinks. They are set up in scenarios that are directly used for evaluation and subsequent comparison. This study uses a variant of “Cradle-To-Grave” Life Cycle Assessment, where a full assessment occurs from resource extraction to disposal, while using an attributive approach. The results of the life cycle assessment showed which system has the lowest impact and the results are quantified. Finally, based on the results of the life cycle assessment, the most suitable water chiller system is recommended and the University management is provided with information for further decision making.
RECYCLED PA 12 EXCLUDED FROM PROCESSING BY ADDITIVE TECHNOLOGIES
Authors: SEIDL MARTIN ,   Technical University of Liberec, Institute for Nanomaterials, Advanced Technologies and Innovation, Department of Industrial Technology, HABR JIRI , SAFKA JIRI , BOBEK JIRI ,   Technical University of Liberec, Faculty of Mechanical Engineering, Department of Engineering Technology,   Technical University of Liberec, Institute for Nanomaterials, Advanced Technologies and Innovation, Department of Industrial Technology,   Technical University of Liberec, Institute for Nanomaterials, Advanced Technologies and Innovation, Department of Industrial Technology
Published: May 2023

The ecological and economical treatment of derivatives from non-renewable sources is a current trend in the development of polymer systems, which supports global activities leading towards a sustainable environment. This article, therefore, deals with the effective management of powdered waste material (PA 12), which is no longer usable for additive technologies. Throughout recycling process, the material was modified and optimised for injection moulding technology, and transformed into pellets in the next step. The resulting thermoplastic material has a wide application potential, especially with regard to its very good mechanical and physical properties, which are evaluated in this contribution. The advantages of the resulting polymer are based, among other things, on the economic aspect, whereby a material with the nature of a structural plastic will be more available compared to plastics from an analogous category.