bluuebunny/crossref_metadata_2025_split huggingface dataset:
Melting mechanisms in corotating twin-screw extrusion: a critical review
Authors: Vergnes Bruno 
Published: October 2023

Abstract
Corotating twin-screw extrusion is widely used for many applications in mixing and compounding. While the flow conditions in the different screw elements are now well known and accurately modeled, the melting mechanisms, i.e. the transition between solid and molten polymer, are much less understood and are still the subject of debates. In this review paper, experimental observations from the literature are first presented and commented, followed by the proposed theoretical approaches. It will be concluded that a satisfactory model considering the different mechanisms involved in the melting step has yet to be elaborated, unlike what exists for the single screw extrusion.
Simplified REGINN-IT method in Banach spaces for nonlinear ill-posed operator equations
Authors: Mahale Pallavi , Shaikh Farheen M. 
Published: October 2023

Abstract
In 2021, Z. Fu, Y. Chen and B. Han introduced an inexact Newton regularization (REGINN-IT) using an idea involving the non-stationary iterated Tikhonov regularization scheme for solving nonlinear ill-posed operator equations.
In this paper, we suggest a simplified version of the REGINN-IT scheme by using the Bregman distance, duality mapping and a suitable parameter choice strategy to produce an approximate solution.
The method is comprised of inner and outer iteration steps.
The outer iterates are stopped by a Morozov-type stopping rule, while the inner iterate is executed by making use of the non-stationary iterated Tikhonov scheme.
We have studied convergence of the proposed method under some standard assumptions and utilizing tools from convex analysis.
The novelty of the method is that it requires computation of the Fréchet derivative only at an initial guess of an exact solution and hence can be identified as more efficient compared to the method given by Z. Fu, Y. Chen and B. Han.
Further, in the last section of the paper, we discuss test examples to inspect the proficiency of the method.
All-dielectric metaoptics for the compact generation of double-ring perfect vector beams
Authors: Vogliardi Andrea , Ruffato Gianluca , Bonaldo Daniele , Dal Zilio Simone , Romanato Filippo 
Published: October 2023

Abstract
Perfect vortices, whose ring profile is independent of the topological charge, play a key role in telecommunications and particle micro-manipulation. In this work, we report the compact generation of a new kind of double-ring perfect vortices, called double-ring perfect vector beams, by exploiting dual-functional silicon metaoptics. In particular, we develop and test a new paradigm to generate those beams with the possibility of selecting different topological charges between the two rings. The generated beams are characterized through a filtering method, proving that the two rings have a vectorial nature with the same magnitude and either the same or different topological charges. Their unique properties suggest promising applications for optical tweezing and manipulation of low refractive-index particles, trapping of cold atoms, and high-capacity communications.
Mathematical analysis of the transmission dynamics of viral infection with effective control policies via fractional derivative
Authors: Jan Rashid , Razak Normy Norfiza Abdul , Boulaaras Salah , Rehman Ziad Ur , Bahramand Salma 
Published: October 2023

Abstract
It is well known that viral infections have a high impact on public health in multiple ways, including disease burden, outbreaks and pandemic, economic consequences, emergency response, strain on healthcare systems, psychological and social effects, and the importance of vaccination. Mathematical models of viral infections help policymakers and researchers to understand how diseases can spread, predict the potential impact of interventions, and make informed decisions to control and manage outbreaks. In this work, we formulate a mathematical model for the transmission dynamics of COVID-19 in the framework of a fractional derivative. For the analysis of the recommended model, the fundamental concepts and results are presented. For the validity of the model, we have proven that the solutions of the recommended model are positive and bounded. The qualitative and quantitative analyses of the proposed dynamics have been carried out in this research work. To ensure the existence and uniqueness of the proposed COVID-19 dynamics, we employ fixed-point theorems such as Schaefer and Banach. In addition to this, we establish stability results for the system of COVID-19 infection through mathematical skills. To assess the influence of input parameters on the proposed dynamics of the infection, we analyzed the solution pathways using the Laplace Adomian decomposition approach. Moreover, we performed different simulations to conceptualize the role of input parameters on the dynamics of the infection. These simulations provide visualizations of key factors and aid public health officials in implementing effective measures to control the spread of the virus.
Raphanus caudatus biomass powder as potential adsorbent for the removal of crystal violet and Rhodamine B dye from wastewater
Authors: Naseem Khalida , Ahmad Khalil , Anwar Aneela , Farooqi Zahoor H. , Najeeb Jawayria , Iftikhar Muhammad Ahmer , Hassan Warda , Batool Ain Ul , Haider Sajjad , Akhtar Muhammad Saeed 
Published: October 2023

Abstract
In this work, Raphanus caudatus (radish pod) leaves biomass was used as an adsorbent for the removal of crystal violet (CV) and Rhodamine B (RhB) dye from water medium. Adsorption process was performed by changing different adsorption factors such as adsorbent dose, agitation time, adsorbate concentration, pH and temperature to get maximum removal of dyes. It was observed that R. caudatus leaves biomass showed 48.7 and 19.0 mg/g value of adsorption capacity for CV and RhB dyes, respectively. High adsorption capacity value for CV was observed due to its less complex structure and small sized molecules as compared to the RhB dye molecules. Dyes removal process followed pseudo second order with the values of regression factor (R
2) found as 0.999 and 0.998 for CV and RhB, respectively. Values of R
2 were found as 0.999 and 0.998 for the removal of CV and RhB respectively while following the Langmuir adsorption isotherm model. It illustrates the single layered dye molecules adsorption over the homogeneous surface of the adsorbent. Value of enthalpy (ΔH°) was found as 11.983 and 12.28 kJ/mol for CV and RhB, respectively. It indicates endothermic nature of the process along with the increased entropy at the surface of the adsorbent during the process. Increase of salt concentration in adsorption medium caused the decreased percentage removal of dyes. Reported adsorbent also showed potential for the removal of toxic dyes from industrial wastewater.
A minőségi oktatás nélkülözhetetlen a társadalmi fejlődéshez
Authors: Farkas Éva 
Published: October 2023

Az oktatás színvonala döntő hatással van az egész társadalom minőségére és kutatások széles köre bizonyítja, hogy az oktatás minősége ok-okozati összefüggésben áll a gazdasági és társadalmi fejlődéssel. A magasabb végzettségi és műveltségi szint nem csak a jobb foglalkoztatottsági és jövedelmi viszonyokkal mutat szoros összefüggést, de pozitív hatással van a várható élettartamra, az egészségi állapotra, az életminőségre és a szubjektív jóllétre, valamint csökkenti a szegénység és a társadalmi leszakadás kockázatát. Az oktatásba való befektetés tehát az oktatáson kívüli szakpolitikai területek céljainak hatékonyabb megvalósítása szempontjából is előnyökkel jár.
Miközben a legnagyobb kihívást az emberek továbbképzése és felzárkóztatása jelenti a gyorsan változó munkaköri készségigényekhez, azzal a ténnyel is szembesülni kell, hogy a felnőttek jelentős része súlyos alapkompetenciahiánnyal küzd, ami nemcsak a foglalkoztathatóságukat korlátozza, hanem az információkhoz és a tanuláshoz való hozzáférésüket, és a mindennapi életük hatékony menedzselésének képességét is. A halmozódó kihívásokra leghatékonyabban az oktatás minőségének növelésével lehet válaszolni.
A tanulmány a képzettség és az egyéni, társadalmi, és munkaerő-piaci boldogulás közötti összefüggések elemzésével igyekszik felhívni a figyelmet a tanulás és a minőségi oktatás jelentőségére, illetve annak egyre nyilvánvalóbb hiányára.
A tanulóközpontú iskola, a kompetenciák fejlesztése és a játékos, tapasztalati matematikatanulás: elméleti megalapozás
Authors: Klein Sándor , Kiss Julianna , Nemeskéri Zsolt , Zádori Iván 
Published: October 2023

A Pécsi Tudományegyetem munkatársaiként évtizedek óta törekszünk arra, hogy a tanárok minél sikeresebben járuljanak hozzá tanulóik legfontosabb kompetenciáinak fejlesztéséhez. Dolgozatunkban három olyan témát emeltünk ki (egy-egy neves pszichológushoz kapcsolódóan), amelyekkel a jövőben is intenzíven foglalkozni szeretnénk:
A személyközpontú megközelítés Carl Rogers munkássága alapján az elmúlt hatvan évben világszerte befolyásolja a segítő foglalkozásúak szemléletmódját. A 80-as években a szegedi Juhász Gyula Tanárképző Főiskoláról indulva kezdtünk hozzá elterjesztéséhez, amit a pécsi tanárok továbbképzésével folytattunk.
John Raven pszichokibernetikai szemlélete arra mutat rá, hogy a pedagógia olyan komplex rendszer, amelyben a bonyolult kölcsönhatások miatt egy-egy tényező pozitív változása akár káros is lehet az összteljesítményre. Az egyetem, amikor díszdoktorrá avatta John Ravent, azt is ki akarta ezzel fejezni, hogy fokozottan építeni akarunk munkásságára a tanárképzésben.
Dienes Zoltán Pál a játékos, tapasztalati, felfedező matematikatanulás/ matematika-tanítás világszerte legizgalmasabbnak tartott alakja. Életének utolsó éveiben ő is egyetemünk díszdoktora lett, és mi felvállaltuk, hogy játékos taneszközeit eljuttattjuk a magyar iskolákba. A „Dienes módszer” – reményeink szerint – mindenkivel megkedvelteti ezt a ma még sok diák számára idegen, szorongáskeltő tantárgyat.
A tanulmányban bemutatott irányzatok további komoly erőfeszítések esetén elősegíthetik, hogy pedagógiai gyakorlatunk gyerekközpontúbb és egyben eredményesebb legyen.
Metabolic plasticity sustains the robustness of Caenorhabditis elegans embryogenesis
Authors: Chen Siyu , Su Xing , Zhu Jinglin , Xiao Long , Cong Yulin , Yang Leilei , Du Zhuo , Huang Xun 
Published: October 2023

AbstractEmbryogenesis is highly dependent on maternally loaded materials, particularly those used for energy production. Different environmental conditions and genetic backgrounds shape embryogenesis. The robustness of embryogenesis in response to extrinsic and intrinsic changes remains incompletely understood. By analyzing the levels of two major nutrients, glycogen and neutral lipids, we discovered stage‐dependent usage of these two nutrients along with mitochondrial morphology changes during Caenorhabditis elegans embryogenesis. ATGL, the rate‐limiting lipase in cellular lipolysis, is expressed and required in the hypodermis to regulate mitochondrial function and support embryogenesis. The embryonic lethality of atgl‐1 mutants can be suppressed by reducing sinh‐1/age‐1‐akt signaling, likely through modulating glucose metabolism to maintain sustainable glucose consumption. The embryonic lethality of atgl‐1(xd314) is also affected by parental nutrition. Parental glucose and oleic acid supplements promote glycogen storage in atgl‐1(xd314) embryos to compensate for the impaired lipolysis. The rescue by parental vitamin B12 supplement is likely through enhancing mitochondrial function in atgl‐1 mutants. These findings reveal that metabolic plasticity contributes to the robustness of C. elegans embryogenesis.
Substrate Specificity of Bacillus megaterium UСM B-5710 Keratinase
Authors: Avdiyuk K.V. , Varbanets L.D. 
Published: October 2023

The specifics of the processing of livestock and poultry products is that in the process of obtaining the main marketable products, about half the feedstock at various stages of the technological process turns into waste that pollutes the environment. These by-products contain large amounts of the hard-to-digest keratin protein. The use of specific enzymes capable of degrading this protein helps not only to reduce the negative anthropogenic impact on nature but also to obtain valuable hydrolysates that can be used as a fertilizer for plants or a feed additive. The aim of this work was to study the ability of Bacillus megaterium UCM B-5710 to split various keratin-containing substrates: black and white chicken feathers, white turkey feathers, parrot feathers of various colors, sheep wool, pig bristles, and baby hair and nails. Methods. The culture was grown under conditions of submerged cultivation at 40 °C, with a nutrient medium stirring rate of 201 rpm for 6 days. For growth, a basic nutrient medium containing 0.5% defatted chicken feathers or other keratin-containing substrates as sole sources of carbon and nitrogen were used. Keratinase activity was assessed by UV absorption at 280 nm of hydrolysis products of keratin-containing raw materials. Protein was determined by the Lowry method, caseinolytic (total proteolytic) activity was determined by the Anson method modified by Petrova, and amino acid content was determined by the ninhydrin method. The degree of hydrolysis of the substrates was evaluated by the ratio of the initial and final weight of the substrate. Results. It was shown that the synthesis of keratinase by the culture of B. megaterium UCM B-5710 begins from the 6th hour of cultivation. The level of protein and proteolytic activity and the content of amino acids increased throughout the entire period of culture growth. The supernatant of the culture liquid of B. megaterium UCM B-5710 was most effective in splitting white chicken’s and turkey’s feathers, a little slower — feathers of black chicken and blue parrots, as well as wool of white sheep. According to the degree of splitting, the substrates used can be arranged in the following order: white turkey feathers > white chicken feathers > black chicken feathers > blue parrot feathers > white sheep wool > baby nails > pig bristle > baby hair. The study of the effect of feather color on the resistance to decomposition showed that black, blue, and red feathers are more resistant, which coincides with the literature data. Conclusions. B. megaterium UCM B-5710 produces keratinase capable of splitting both α- and β-keratins, however, with different efficiencies and rates.
Influence of the powders phase composition and sintering atmosphere on the structure and magnetic properties of Mn-Zn ferrites
Authors: Kuzmin Ruslan , Khabirov Roman , Mass Anna , Lozhkina Elena 
Published: October 2023

The magnetic properties of Mn-Zn ferrites depend strongly on the microstructure, chemical and phase composition. In this paper the effect of synthesis and sintering conditions on the structure, phase composition and properties of Mn-Zn ferrites is investigated. The specimens for the study were obtained by pressureless sintering. The magnetic properties were measured on a B-H analyzer. The structure was investigated by XRD and SEM. Materials with an average grain size of 2.2 μm were obtained by sintering at a temperature of 1265 °C. It was found that an increase in the synthesis temperature from 700 to 1000 °C promotes the growth of the initial magnetic permeability of these materials from 1100 to 1370. The rapid cooling of the powders synthesized at 1000 °C allows maintaining a high content of the spinel phase. In the structure of materials obtained by sintering powders with initially high spinel content at 1300 °C, grains of abnormally large size are formed. This leads to an increase in the initial permeability, magnetic induction at Hm = 1200 A/m, f = 10 kHz and magnetic losses at high frequencies (up to 500 kHz). A material with fine-grained structure was obtained by using air at the heating stage of pressureless sintering. This contributed to the reduction of magnetic losses without a significant decrease in Bm.
Arun Joshi: A Literary Artist of Existential Writing
Authors: Kumar Rakesh , Pandey Sanjay Prasad , Batta Ajoy 
Published: October 2023

Existentialism, a very important literary movement of the twentieth century, occupies a very important place in the world literature. The major proponents of this theory are Soren Kierkegaard, Friedrich Nietzsche, Jean Paul Sartre, Albert Camus and others. The key features associated with the existential literature are the depiction of sense of alienation, detachment, loneliness, aloofness, anxiety among the denizens of the modern world. Although, to begin with it was a European phenomenon, it soon spread to other parts of the world and impacted the writers all over the world. India also came under its influence. Many Indian writers exhibited existential traits in their works. Arun Joshi was the most prominent of them. His works, especially all novels, very beautifully incorporates existential elements. The present paper intends to study and exhibit the existential traits in the novels of Arun Joshi.
Hemşirelik Öğrencilerinin Organ Bağışı ve Transplantasyon Konusundaki Bilgi ve Tutumlarının Belirlenmesi
Authors: TEKİN Yasemin Eda , ABDULLAYEV Ayşegül 
Published: October 2023

Giriş: Organ nakli alanında büyük gelişmeler yaşanmasına rağmen uzun yıllardır tüm dünyada organ bağışı sayıları istenen düzeye getirilememiştir. Geleceğin sağlık profesyonelleri olan hemşirelik öğrencilerinin bu konudaki bilgi ve tutumları, organ bağışı konusunda hasta ve yakınlarının farkındalığının artırılması açısından önemlidir.
Amaç: Bu çalışmanın amacı, hemşirelik öğrencilerinin organ bağışı ve transplantasyon konusundaki bilgi ve tutumlarını belirlemektir.
Gereç-Yöntem: Bu araştırma 257 hemşirelik öğrencisi üzerinde tanımlayıcı olarak yapılmıştır. Veriler araştırmacılar tarafında hazırlanan “Organ Bağışına Yönelik Davranış ve Tutum Belirleme Formu” ve “Organ-Doku Bağışı ve Transplantasyon Bilgi Ölçeği” kullanılarak toplanmıştır. Verilerin değerlendirilmesinde frekans, ortalama, yüzde, standart sapma ve Tukey testi kullanılmıştır.
Bulgular: Öğrencilerin %84,4’ü organ bağışında bulunmak istediğini belirmektedir. Öğrencilerin çoğunluğu toplumun organ bağışı konusunda yeterince bilgilendirilmediğini düşündüğünü, %60,3’ü ülkemizde organ bağışı yapacak kişilerin haklarının yasalarla katı şekilde korunduğuna inanmadığını, yalnızca %24,0’ü okul eğitimi sırasında bilgi edindiğini belirtmiştir. Öğrencilerin %84,8’i karşı cinsten bir kişiye organını bağışlamak istemediğini belirtmiştir. “Organ-Doku Nakli ve Transplantasyon Bilgi Ölçeği” puan ortalaması 12,9±2,4, “Donör özellikleri” alt boyutu puan ortalaması 3,5±0,9, “Organ bağışı ile ilgili legal, etik ve medikal süreç” alt boyutu puan ortalaması 9,4±1,9’dir. Organ bağışında bulunmak isteyen öğrencilerin ve organ bağışında bulunmayı isteyenlerin ölçek toplam puanı anlamlı olarak daha yüksektir (p
Gebelerin E-Sağlık Okuryazarlığının ve Sağlıklı Yaşam Davranışlarının İncelenmesi
Authors: BALTACI Nazlı , KAYA Nurdan , KILIÇKAYA İremnur 
Published: October 2023

Amaç: Bu araştırma, gebe kadınların e-sağlık okuryazarlığı ve sağlıklı yaşam davranışları düzeylerini, bunlarla ilişkili faktörleri belirlemek amacıyla yapılmıştır.
Yöntem: Kesitsel tipte olan araştırma, sosyal medya platformları aracılığı ile online olarak 267 gebe kadın ile yapılmıştır. Araştırma verileri “Gebe Tanıtım Formu”, “E-Sağlık Okuryazarlığı Ölçeği (ESOÖ)” ve “Gebelikte Sağlıklı Yaşam Davranışları Ölçeği (GSYDÖ)” ile toplanmıştır. Veriler, bağımsız örneklem t testi, tek yönlü varyans analizi, Tukey HSD testi, Pearson korelasyon analizi ile değerlendirilmiştir.
Bulgular: Gebelerin ESOÖ puan ortalaması 30,51±4,83 ve GSYDÖ toplam puan ortalaması 113,99±13,15 olarak bulundu. Gebeliğe ilişkin herhangi bir şikayeti olmayan, gebelik sürecinde yeterli sağlık hizmeti aldığını düşünen ve bu süreçte sağlık, kendine, bebeğine bakım ile ilgili bilgisi olan, internet/sosyal medyadan edindiği bilgilerin doğruluğunu sağlık profesyonellerine danışan ve internette gebelik süreci ile ilgili sağlık kaynaklarına erişebilmenin önemli olduğunu düşünen kadınlar daha fazla e-sağlık okuryazarlığa ve gebelikte sağlıklı yaşam davranışlarına sahipti (p
Talasemi Hastası Çocukların Beslenme Durumunun Değerlendirilmesi
Authors: ASLAN ÇİN Nazlı Nur , KOÇ Nevra 
Published: October 2023

Amaç: Araştırma 2-17 yaş arası talasemi tanılı çocukların beslenme durumunu incelemek amacıyla yapılmıştır.
Yöntem: Araştırma, 86 talasemi hastasından dahil edilme kriterlerini karşılayan ve gönüllü olan 2-17 yaş arası, talasemi tanısı alan 23 çocuk ile yürütülmüştür. Veriler çocukların sosyodemografik özellikleri, beslenme alışkanlıkları, antropometrik ölçümleri, biyokimyasal bulguları ve besin tüketim kaydı sorularından oluşan anket formu ile yüz yüze toplanmıştır. Araştırmadan elde edilen veriler SPSS 25,0 paket programı kullanılarak uygun istatistiki testler kullanılarak değerlendirilmiştir.
Bulgular: Katılımcıların %65,2’si kız ve %34,8’i erkek olup, ortalama yaş 10,3±5,2 yıl olarak saptanmıştır. Çalışmaya katılan çocukların tamamının (%100,0) hemoglobin ve hematokrit düzeyleri düşük, ferritin düzeyleri yüksekti. Talasemi hastası çocukların %52,2’si besin desteği kullandığını ve en çok kullandıkları üç besin desteğinin D vitamini (%52,2), folik asit (%26,1) ve çinko (%21,7) olduğu belirlenmiştir. Talasemi hastası kız çocuklarının yaklaşık yarısının enerji (%43,5) ve kalsiyum (%53,3) alımlarının yetersiz olduğu; erkek çocukların enerji (%50,0), folat, (%50,0), C vitamini (%37,5), kalsiyum (%37,5) ve magnezyum (%37,5) alımlarının yetersiz olduğu saptanmıştır. İki-10 yaş aralığındaki çocukların %30,0’unun folat, %40’ının kalsiyum alımlarının yetersiz olduğu saptanmıştır. Bunun yanı sıra, 11-17 yaş aralığındaki çocukların %53,8’inin C vitamini ve kalsiyum, %38,5’inin çinko alımlarının yetersiz olduğu saptanmıştır.
Sonuç: Talasemi hastası çocukların makro ve mikro besin ögelerini yetersiz aldığı saptanmıştır. Bu çalışma talasemi tanılı çocukların beslenme yetersizliği açısından risk altında olduğunu saptamak için beslenme izlemine ihtiyaçları olduğunu belirlemiştir. Gelecekteki çalışmalar, Türk talasemi hastası çocuklarda daha geniş örneklemde diyet kalitesi ve beslenme durumunun sağlık sonuçları üzerindeki etkisine doğrudan odaklanmalıdır.
Comparing Perceptions: Westerners and Kenyans Facing Swahili Tangible Cultural Heritage. An Inquiry on Gede, Mnarani, and Jumba La Mtwana Ruins
Authors: Capriotti Giuseppe 
Published: October 2023

The tangible heritage of the Kenyan coastal area between Malindi and Mombasa is mainly represented by ruins of urban settlements that date between the 10th and 18th centuries and are central to the formation of the Swahili culture. Very often, these archaeological sites feature contemporary snake parks, with reptiles displayed in Perspex boxes. As a result of suggestions in European and American guidebooks that strongly recommend visits as unforgettable, these sites are mostly visited by foreign tourists.
The aim of this paper is to analyse the perception of value of these coastal ruins, to understand how the current inhabitants approach the Swahili past, and with a focus on the relationship between identity and tangible culture. The first sources for this research are tourist guidebooks: how are the ruins presented in the international guides for tourists and in local guides for Kenyan citizens? What differences can we notice? In addition, during a long stay on the coast, we carried out a survey using a questionnaire as a supplementary tool to better understand the perception of the value of ruins among the local communities. The provisional outcomes show that only a small number of local inhabitants have visited the ruins and that, in general, they are not perceived as a fundamental trait of coastal identity. Why do the Mijikenda, the traditional inhabitants of this area, weakly identify themselves with the cultural/historical heritage of the stone towns? Are local societies fostering new connections with ruins and monuments that are present in the territories they inhabit? Is tangible cultural heritage used to support new interpretations of the past?