bluuebunny/crossref_metadata_2025 huggingface dataset:
Profanity and Play: Solidarity in the Discourse of Cyberbullying
Authors: Jones Jeremy
Published: December 2021

Offering the world countless remarkable benefits, computer mediated communication has become an essential feature of modern life. However, it has also become a medium for personal aggression and abuse of diverse kinds. The discourse of online vilification has been the topic of much research, for instance on the behaviour of trolls. This study focuses on a little researched phenomenon, the discourse of cyberbullying, in particular a subtype, cybermobbing, in which a group of participants gather online to attack an individual over a period of time. The study takes up an example of such participants who joined a Facebook group dedicated to abusing a prominent sportsman. The purpose of the study is to identify the chief discourse characteristics of cybermobbing that bind the participants together. The analysis reveals a high degree of solidarity among the participants expressed through profanity, humour, and play. The results will also throw light on the mentality of those who engage in cybermobbing.
Prevalence of Hypertension and Its Associated Factors among Adults in Selected Areas of Bangladesh: A Community Based Cross-sectional Study
Authors: Rahman Nahian , Alam Syeda Saima , Nisha Shaidaton , Mohsin Faroque Md , Mannan Mahmudul , Hasan Mahedi , Rahman Mahbubur , Tory Smita Roy , Rahman Sabrina , Zobayed Abu , Hossain Mosharop , Mamun Jakaria Al , Faruk Omar , Dina Sumaiya Jahan , Islam Khaleda
Published: December 2021

Background: Hypertension is a silent killer and an overwhelming global public health challenge. This study aimed to determine the prevalence and associated factors of hypertension among adults in Bangladesh.

Methods: A community-based cross-sectional study design was conducted among 400 adults who lived in Dhaka, Mymensing, Sylhet and Khulna District. Data were collected using a structured questionnaire that is adapted from the WHO Stepwise approach. Data was analyzed by SPSS version 25. Descriptive statistics and bivariate logistic regression analysis were conducted and statistical significance was declared at a p-value ≤0.05.

Results: This study identified a high prevalence of hypertension in the study area and it was 39.75%. Among the male the prevalence was 23.5% and the prevalence was 16.5% among female. In this study hypertension was significantly associated with the age group 51-65 years (OR=1.02; CI 0.557-1.862) , ever smoking (OR= 2.59; CI 1.718-3.917) consume  less fruits (OR=3.125; CI 0.839-11.632) and vegetable (OR=2.25; CI 1.364-3.725), physically inactive (OR=1.48;CI 0.973-2.252) overweight (OR=7.98; CI 4.612-13.793) and had diabetes mellitus (0R=2.38; CI 1.213-4.659).

Conclusion: The prevalence of hypertension was considerably higher in this study area. Hence, the health care system needs to establish strategies to improve the diagnostic and screening services. Community-level intervention and regular assessment, screening, and diagnosis of behavioral, socio-demographic, and physiological risk factors, screening, should be institutionalized to address the occult burden of hypertension.
De ombudsman als constructieve macht en polariserende tegenmacht
Authors: Bokhorst Meike
Published: December 2021

Dossier

In this feature authors discuss recent research findings that are of interest to readers of Beleid en Maatschappij.
Mobilisering van het recht als vorm van tegenmacht
Authors: Handmaker Jeff , Taekema Sanne
Published: December 2021

Dossier

In this feature authors discuss recent research findings that are of interest to readers of Beleid en Maatschappij.
Factuurfraude: wie betaalt de prijs?
Authors: de Leeuw D.M.H.
Published: December 2021

Factuurfraude: wie betaalt de prijs? Bevrijdend betalen na het Devante/Hascor-arrest (HR 28 mei 2021, ECLI:NL:HR:2021:783)

In het Devante/Hascor-arrest heeft de Hoge Raad zich uitgelaten over de te hanteren maatstaf bij beantwoording van de vraag of bevrijdend is betaald in het geval van factuurfraude. In dit artikel wordt onder meer ingegaan op de vraag welke omstandigheden een uitzondering op de in dit arrest gegeven hoofdregel kunnen rechtvaardigen en welke concrete handvatten voor het bestuur van vennootschappen uit dit arrest kunnen worden afgeleid.
De Overleveringswet op de helling: de herimplementatie van Kaderbesluit 2002/584/JBZ
Authors: Glerum V.H. (Vincent)
Published: December 2021

De Overleveringswet op de helling: de herimplementatie van Kaderbesluit 2002/584/JBZ

De Overleveringswet strekt tot uitvoering van Kaderbesluit 2002/584/JBZ. Deze wet bevatte een groot aantal gebreken. Een deel daarvan was aangetoond in arresten van het Hof van Justitie van de Europese Unie. De op 1 april 2021 in werking getreden Herimplementatiewet beoogde de Overleveringswet in overeenstemming met die arresten te brengen. Deze bijdrage

toont aan dat de Herimplementatiewet maar ten dele in die opzet is geslaagd, dat deze wet een aantal gebreken die (nog) niet in arresten van het Hof van Justitie zijn aangetoond ongemoeid heeft gelaten en dat deze wet bovendien een aantal nieuwe gebreken heeft gecreëerd.
Structure and electrochemical behaviour of weldments of titanium Grade 1 in a bromine-containing solution
Authors: Ilieva M.D. , Ferdinandov N.V. , Gospodinov D.D. , Radev R.H.
Published: December 2021

Purpose: The presented research aims to determine the microstructural changes in weldments of commercially pure titanium Grade 1 after welding by hollow cathode arc discharge in vacuum and related changes in the corrosion behaviour of the weldments.
Design/methodology/approach: Macro and microstructure of weldments were studied using optical microscopy. Corrosion behaviour of untreated Grade 1 and heat-affected zone of weldments of Grade 1 was investigated using electrochemical testing, including open circuit potential measurements and potentiodynamic polarisation. As an aggressive environment, 1 M KBr water solution was used.
Findings: Welding by hollow cathode arc discharge in vacuum leads to the formation of a coarse Widmanstätten structure in the heat-affected zone. This imperfect structure results in a passive layer with worsened protective properties, thus increasing the corrosion rate of weldments by up to two orders of magnitude compared to Grade 1 in as-received condition. The passive layer on the welded surfaces did not allow Grade 1 to acquire a stable corrosion potential during potenitodynamic polarization.
Research limitations/implications: Titanium and its alloys are passivating metallic materials, and their corrosion resistance depends on the properties of a thin protective surface layer. Changes in the underlying metal microstructure can affect the passivation behaviour of titanium and the properties of this layer. Welding by hollow cathode arc discharge in vacuum alters the microstructure of heat-affected zone, thereby causing Widmanstätten microstructure to form. As the passive layer over that microstructure has worsened protective properties, we suggest additional heat treatment after welding to be applied. Future experimental research on this topic is needed.
Originality/value: Welding by hollow cathode arc discharge in vacuum is a welding method allowing weldments to be done in a clean environment and even in space. In the specialised literature, information on the structure and corrosion resistance of weldments of commercially pure titanium Grade 1 welded by hollow cathode arc discharge in vacuum is missing. The present research fills in a tiny part of this gap in our knowledge.
Trend of asthma prevalence among children based on regional urbanization level in Japan; 2006–2019
Authors: Okui Tasuku
Published: December 2021

Although it has been known that the prevalence of asthma tends to be higher among children in the metropolitan areas of Japan, trends of the prevalence with respect to the regional urbanization level has not been investigated in recent years. We investigated trends in the prevalence of asthma among children and air pollutant concentrations by regional urbanization levels using data from the School Health Statistics Survey in Japan from 2006 to 2019. We calculated the age-standardized prevalence of asthma for each year, gender, regional urbanization level, and annual percent change (APC). In addition, the slope index of inequality (SII) and relative index of inequality (RII) were calculated for evaluating disparity in age-standardized asthma prevalence depending on regional urbanization levels. Moreover, we calculated the mean of the annual average values by regional urbanization levels for sulfur dioxide (SO2), nitrogen dioxide (NO2), suspended particulate matter (SPM), carbon monoxide (CO), and photochemical oxidant (Ox) from 2006 to 2018. We found that the age-standardized prevalence significantly decreased in the periods in the metropolis for males and females, and the degree of the decrease was largest in the metropolis. Conversely, the age-standardized prevalence increased in towns and villages, and the APC was greater than zero. In addition, both the SII and RII showed significant decreasing trends in the study period, and the regional disparity shrank over the years. Moreover, concentrations of the air pollutants were highest in the metropolis throughout the years except for Ox, whereas the difference in the concentrations of NO2, SPM, and CO decreased between the metropolis and the other areas over the years. In conclusion, disparity in asthma prevalence depending on regional urbanization level decreased from 2006 to 2019, and there is a possibility that regional difference in trend of the air pollutants is related to the result.
Multimodal imaging of type 2 acute macular neuroretinopathy in a young woman
Authors: Powers, MD James H. , Singh, BS Pali P. , Grewal, MD Dilraj S. , Matthews, MD John D. , Fekrat, MD Sharon
Published: December 2021

We report a case of type 2 acute macular neuroretinopathy (AMN) that occurred in an otherwise healthy 22-year-old white woman taking oral contraceptives and consuming large quantities of caffeinated coffee. The patient presented with a teardrop-shaped scotoma just inferior to her central vision in her left eye after a recent and significant increase in coffee consumption. A small extrafoveal retinal lesion was present superior to the fovea on pseudocolor fundus photography. Multimodal retinal imaging demonstrated focal disruption of the inner segment-outer segment junction of the photoreceptors with overlying hyperreflectivity at the level of the outer plexiform layer superior to the fovea, consistent with a diagnosis of type 2 AMN. Oral contraceptive use and high caffeine intake may be risk factors for the development of type 2 AMN.
57-year-old woman with periocular pain
Authors: Strelow, MD, MA Bryan , Nguyen, BS Michelle , Klifto, MD Meredith R.
Published: December 2021

A 57-year-old white woman presented to the outpatient glaucoma clinic of the University of North Carolina Health System for a scheduled appointment with a new complaint of worsening headache in the setting of recent sinus infection of 3 weeks’ duration. She had been referred to the glaucoma clinic for mildly elevated intraocular pressure (IOP) as a known primary angle-closure glaucoma suspect (both eyes) after bilateral laser peripheral iridotomy (LPI). She had a maternal family history of glaucoma. She denied history of other prior eye disease or surgery, and she denied history of prior eye trauma. Her past medical history was significant for chronic pain, including lumbar radiculopathy, myofascial pain syndrome, and migraine headaches, for which she was followed by pain management specialists.Further history revealed that 6 years earlier, the patient was referred by optometry to an outside glaucoma specialist for concerns of angle closure in the setting of narrow angles. She reported symptoms of periocular headache and photophobia. At that time, records indicated that she had narrow, occludable angles in both eyes with closed presentation on gonioscopy and normal IOPs of 16 mm Hg in each eye. Prophylactic LPI was recommended and performed at that time.
56-year-old man with a unilateral central scotoma
Authors: Shah, BA Khushali , Fowler, MD, PhD Benjamin J. , Lin, MD Benjamin , Cavuoto, MD Kara M. , Sridhar, MD Jayanth
Published: December 2021

A healthy 56-year-old man presented at the Bascom Palmer Eye Institute in Miami, Florida, with 3 days of small floaters and a central “purple spot” in his right eye. On review of social history, he acknowledged a sexual history that included sex with other men, most recently 4 months prior to presentation. A complete review of systems was otherwise negative, and he denied trauma or prior ophthalmic surgery.
Nationhood Today in the US and India
Authors: Gandhi Rajmohan ,   Eastern Illinois University
Published: December 2021

The drives of white nationalism in the US and Hindu nationalism in India are found to be significantly similar in aim and methods. Witnessed in two large nations that are alike too in diversity and in constitutions, the two drives violate statutory norms as also the norms of democracy and equality acknowledged by the world. Contrasting these drives with Gandhi’s vision of partnership and mutual respect among communities and races is illuminating. It may be seen, in addition, that both white nationalism and Hindu nationalism rest on a falsification of history. Stirring up and employing a sentiment of majority victimhood, and another sentiment of dislike for the minority “other,” the two drives present a challenge to all who regard humanity as one and human beings as equal.
Características geomorfológicas e hidrológicas no litoral do Nordeste Paraense
Authors: Santos Ana Marcela Alves dos , Coelho Rosana Amorim , Pantoja Vitor Rodrigues , Carneiro Francimary da Silva , Rabelo Ederlane Vale , Ramos Joseane Mercês , Coelho Laíse da Costa
Published: December 2021

Este estudo teve como finalidade expor as características geomorfológicas e hidrológicas das cidades de Bragança e Salinópolis e das ilhas de Ajuruteua e Atalaia e seus agentes, possibilitando um estudo de campo sobre os olhares urbanos e físicos da geografia. A metodologia foi composta pela ida as cidades, sendo norteado por aulas expositivas em reuniões e revisões bibliográficas, para a produção e elaboração de produtos cartográficos. Os principais enfoques foram sobre as caracterizações das áreas de estudo, como as posições geográficas, as rodovias de acesso, as características geológicas, geomorfológicas, da vegetação, hidrografia das localidades estudadas, as principais formas de uso e ocupação e os processos de urbanização e econômico dos municípios. As ilhas e os municípios estudados estão em frequentes mudanças no processo hidrológico e nos processos geomorfológicos estão bem caracterizados nos dois municípios sendo apresentados de maneira enfática no que discorremos no relatório. Assim podemos ter entendido que as rias no qual os municípios e ilhas fazem partes elas estão relacionados com os dois principais processos de estudos os Hidrológicos e Geomorfológicos.
A gestão ambiental nas instituições de ensino superior
Authors: Feitosa Francenilde da Silva , Feitosa Neidiara da Silva , Feitosa Júnior Francisco Rubens
Published: December 2021

A crise política e econômica atual faz com que o interesse em proporcionar uma visão sobre a importância da sustentabilidade através da Gestão Ambiental nas Instituições de Ensino Superior seja imprescindível. O objetivo deste trabalho foi identificar ações ligadas à eficiência de insumos, adotadas pelas Instituições de Ensino Superior (IES) em funcionamento, que podem ser replicadas. Para isso, utilizou-se de pesquisa bibliográfica e qualitativa. Os resultados demonstram que as IES dever-se comprometer a informar a comunidade sobre as medidas de proteção de forma transparente e fornecer a educação, treinamento e incentivo aos seus colaboradores em relação à preservação do meio ambiente e das possíveis soluções de problemas ambientais. E de forma participativa antes da aquisição de insumos verificar com a comunidade as reais necessidades dos mesmos, dessa forma os efeitos ambientais ocasionados por materiais e equipamentos devem ser levados em consideração pela instituição antes da compra. Devendo prioritariamente as IES desempenhar atividades ambientais relevantes e garantir a liberdade na pesquisa e ensino, conscientizando a comunidade de sua responsabilidade social e das consequências ambientais que certos resíduos podem ocasionar. Por último, enfatizar-se a importância de se preservar os recursos naturais para as gerações presentes e futuras, e a promoção da busca de auxilio de colaboradores e discentes, com a finalidade de minimizar as consequências negativas na pesquisa e no ensino institucional, garantindo assim, a maior oferta de trabalhos acadêmicos na área ambiental e cursos que tratam das questões ambientais, em cooperação com outros centros de pesquisas.
Indicadores de desenvolvimento sustentáveis: uma análise comparativa das instituições formadas por agrupamentos territoriais de Santa Catarina - Brasil
Authors: Ferreira Anderson Saccol
Published: December 2021

O estudo foi realizado por meio de uma análise comparativa onde buscou entender quais pontos implicam na elevação dos indicadores de desenvolvimento sustentável. Como objetivo, a pesquisa visa demonstrar quais pontos devem ser fortalecidos oferecendo caminhos alternativos ao desenvolvimento dos indicadores. Como procedimento metodológico, adotamos uma análise documental das instituições no período de 2012 a 2014 evidenciando a dimensão sociocultural, econômica, política e ambiental. As principais constatações demonstram uma variação dos percentuais de desenvolvimento sustentável, bem como, formas de melhorar a classificação das instituições nos indicadores de sustentabilidade.
Gestão participativa no Sistema Municipal de Meio Ambiente: um estudo em Condado-PB
Authors: Santos Antônio Augusto Martins dos , Soares Talita Linhares , Morais Lucas Andrade de , Carvalho Eunice Ferreira , Paiva Cícero Otávio de Lima
Published: December 2021

Cada vez mais é necessário à participação da sociedade civil na tomada de decisões junto ao poder público, principalmente no que diz respeito ás questões ambientais. Nesta perspectiva este estudo teve como objetivo identificar a participação na estruturação do Sistema Municipal de Meio Ambiente do Município de Condado-PB. Para tanto, adotou-se a abordagem qualitativa, quanto a sua natureza a pesquisa denomina-se como descritiva e para instrumento de estudo utilizou-se a pesquisa documental. O estudo foi realizado no Munícipio de Condado na Mesorregião do Sertão Paraibano, onde foram analisados os instrumentos de participação presentes no Município. Identificaram-se instrumentos e órgãos de grande relevância instituídos formalmente, no entanto percebeu-se o desconhecimento de tais políticas por parte da população e a não valorização e atuação desses instrumentos no que se refere à gestão local.
Análise do eixo de rotação da terra no Japão considerando a ocorrência de terremoto ocorrido em março de 2011
Authors: Alves Breno Eduardo dos Santos , Filho Alexandre Santos Fernandes , Rodrigues Hellem Cristina Teixeira , Costa Marcus Vinicius Zamorim da , Silva Rayssa Soares da , Carneiro Francimary da Silva
Published: December 2021

Objetivou-se analisar o eixo de rotação da terra no período superior a um ano, considerando a ocorrência de um fenômeno natural, como o terremoto do Japão ocorrido em março de 2011, para saber se o mesmo contribuiu para alterar o eixo de rotação da Terra e quais as variações sofridas durante o período de estudo. Foram coletados os dados na página oficial do IERS (International Earth Rotation and Reference Systems Service) os dados de orientação da Terra, que são encontrados nos Boletins B, enumerados e coletados no intervalo do boletim B 278 até boletim B 285, que representam o período de setembro de 2010 a setembro de 2011. Com o uso do Excel 2016, tabelou-se e organizaram-se os dados, os quais se referem ao movimento do polo de x e y na unidade de milésimo de segundo (mas). Feito a organização, houve a criação do gráfico no próprio software. As figuras expostas demonstram que as oscilações obedeceram ao padrão cíclico do Movimento de Chandler, de modo que é possível inferir que, apesar da magnitude do evento, não houve interferência sobre o movimento analisado.
L’indépendance du Québec et le choix autochtone de la continuité canadienne
Authors: Otis Ghislain , Laurent Aurélie
Published: December 2021

Des observateurs autochtones et non autochtones estiment que la création éventuelle d’un État québécois souverain ne saurait mettre fin à la relation entre le Canada et les peuples autochtones vivant au Québec sans leur consentement. Prenant en considération les leçons et les modèles qu’offrent les précédents internationaux, en particulier l’expérience européenne, cet article étudie les procédés institutionnels et juridiques qui permettraient, dans l’hypothèse d’un vote référendaire clairement favorable à l’indépendance du Québec, de concilier cette volonté de sécession avec la décision éventuelle de certains peuples autochtones du Québec de conserver leur lien avec le Canada. La négociation d’une entente constitutionnelle et internationale assurant la continuité canadienne pour les autochtones du Québec qui en feraient la demande sera présentée comme une voie privilégiée de conciliation des choix collectifs exprimés, sans nécessairement devoir modifier les frontières du Québec. Les auteurs proposent une définition du champ de la continuité canadienne, décrivent les aspects originaux de l’entente proposée et expliquent les éléments essentiels du régime juridique qui serait mis en place par une telle entente.
Creative and Responsive Advocacy for Reconciliation: The Application of Gladue Principles in Administrative Law
Authors: Martin Andrew Flavelle
Published: December 2021

As a response to the estrangement and alienation of Indigenous peoples from the Canadian justice system, Gladue principles are central to reconciliation in sentencing and other criminal law contexts. However, the role of Gladue principles in administrative law more broadly remains uncertain. In this paper, I argue that the factors underlying Indigenous peoples’ estrangement and alienation from the justice system indicate estrangement and alienation from the administrative state itself, and thus Gladue principles appropriately apply in administrative law contexts. Using the results of a comprehensive search of reported decisions by tribunals and by courts on judicial review, I analyze the reasons given by administrative decision-makers and judges for applying or declining to apply Gladue principles. I argue based on this analysis that Gladue principles will most clearly apply in decisions about a penalty or a benefit for an Indigenous person, and can also apply—albeit in a way that requires more creativity—where the decision is about neither a penalty nor a benefit. On this basis, I provide recommendations for counsel, administrative decision-makers, judges, legislators, and executive authorities to better realize the potential of Gladue principles.
Muitas procesu vadības un orga¬nizācijas novērtēšanas sistēmiskais risinā-jums
Authors: Čevers Aldis
Published: December 2021

Promocijas darba mērķis ir, balstoties uz vienotu muitas funkciju un uzdevumu izvērtēšanu un izmantojot atbilstošu novērtēšanas kritēriju un indikatoru sistēmu, izstrādāt muitas darba un procesu vadības un organizācijas novērtēšanas sistēmisku risinājumu, kas balstīts muitas darbību ietekmējošo faktoru pētījumos. Darba hipotēze, kas noteica pētījuma priekšmetu un virzienus: precīzi identificējot muitas iestāžu funkcijas un uzdevumus, tās darba rezultātus raksturojošos indikatorus un to ietekmējošos iekšējos un ārējos faktorus, ir iespējams pilnveidot muitas procesu vadīšanas sistēmu, objektīvi novērtēt muitas dienesta darbību un atbilstoši tam izvēlēties darba rezultātu vērtēšanas kritērijus.
Tehnoloģijas pārneses vadīšanas risinājumi uzņēmuma augsmei
Authors: Dubickis Mikus
Published: December 2021

Promocijas darba pirmajā daļā raksturota inovācijas un tehnoloģijas pārneses nozīme tautsaimniecības un uzņēmējdarbības vadības kontekstā, analizēti inovācijas un tehnoloģijas pārneses koncepti un veikts tehnoloģijas pārneses snieguma pētījumu pārskats. Otrajā daļā faktoru grupēšanai un empīriskā pētījuma ietvara izveidei izmantotas loģiskā modeļa nostādnes, savukārt trešajā daļā veikta empīrisko datu analīze, interpretācija un aprobācija. Rezultāti liecina, ka inovāciju ieviešana ir būtiska uzņēmuma snieguma pieaugumam, inovāciju ieviešanu sekmē jaunu zināšanu un tehnoloģiju apguve, savukārt apguvi sekmē iekšējo pētniecības un izstrādes darbu veikšana.
SCALING EXPONENT OF COMPACT POLYMER CONFORMATIONS IN NON HOMOGENEOUS MEDIA
Authors: Lekić Dušanka , Elezović Hadžić Sunčica , Adžić Nataša
Published: December 2021

We studied compact conformations of a ring polymer adsorbed on the non homogeneous (e. g. porous) substrates. Substrates are represented by the generalization of modified rectangular (MR) lattice – a hierarchically constructed family of fractal lattices embedded in 2d space and parameterized with an integer p >1. Analyzing the exact set of recursive relations for arbitrary value of p, we established an asymptotic form of a number of conformations. As a correction to the leading exponential factor we obtained the stretched exponential factor with the exponent s = 1/2 on each member of the fractal family. Although it is believed that the critical exponent s on fractal lattices is determined not only by the fractal dimension of the underlying lattice but also by other lattice parameters, here we found that s had the same value on different fractals with the same fractal dimension (df = 2).
USE OF PLATELET-RICH FIBRIN IN MAXILLOFACIAL SURGERY
Authors: Tanasković Nenad
Published: December 2021

Platelet Rich Fibrin (PRF) is autologous biomaterial which is the second-generation platelet concentrate. It has a favorable biological properties that accelerate healing of soft tissue, and bone, giveing a wide range of applications found in oral and maxillofacial surgery and other surgical fields. PRF technique was developed by Choukroun et al in 2001 and it represents a second generation of autologous platelet concentrate, which is used to accelerate the healing of soft and hard tissue. In contrast to the PRP, the PRF is composed of autologous fibrin matrix in which a large amount of platelets and their growth factors are embedded. PRF-graft is used in augmentative techniques residual bone defects, alone or in combination with biomaterials. When the alveolar ridge augmentation technique GBR, the PRF membranes can be used for protection and stabilization of bone compensation. PRF accelerates the healing of soft tissue and reduces the possibility of dehiscence and exposure of the membrane.
AFM TESTING OF NANOSTRUCTURE OF RESILIENCE ORTHODONTIC BONDING SOLUTIONS ORTHODONTIC ADHESIVE
Authors: Mirjanić Vladan , Mirjanić Đorđe
Published: December 2021

Nanostructure of Resilience Orthodontic bonding solutions, an orthodontic adhesive that is mostly used nowadays in the orthodontic practice, is analyzed in the paper. After determining the adhesive properties, a correlation was established between the nanostructure of tested adhesive and the tooth bracket bond strength. Based on AFM images of the analyzed adhesive, by way of correlations of arithmetic means of debonding force (I) and average adhesive roughnesses (Ra, Rq, Rzijs, Rz) we come to a conclusion that by increasing the average adhesive roughnesses, increases the debonding force too (I). After that we compared the obtained results with the other adhesives that are also most commonly used. It was observed that with all the roughness parameters (Ra, Rz, Rzijs and Rq) the strongest bond was achieved with Resilience Orthodontic bonding solutions, followed by Heliosit, Orthodontic (Ivoclar, Vivadent), GC Fuji Ortho LC, while the weakest bond was with ConTec LC − Dentarum. Higher roughness of Resilience Orthodontic bonding solutions at the nano level is most probably due to a bigger number of thorns which penetrate into micro cavities developed under the action of acids. Higher roughness is a consequence of the chemical structure itself of the composite material.
IMPACT OF AMORPHIZATION ON CRITICAL TEMPERATURE OF FERROMAGNET
Authors: Škrgić Enes , Malivuk Gak Dragana , Nježić Saša , Rajilić Zoran
Published: December 2021

In solid state physics, the issue of ferromagnetism and magnetism in general, in structured amorphous materials, attracted great interest in recent years, both in theoretical and experimental research. It is known that the crystal and the amorphous structure of the same substance do not have the same characteristics. Amorphous magnets constitute a class of systems with the highest degree of disorder. The existence of ferromagnetism in amorphous materials is determined by the relation between exchange interactions and configuration of magnetic atoms. In the computer experiments presented in this paper, the general-purpose software Maple was used, as well as a simplified Ising model, which implies that it is a ferromagnetic with a small impact of anti-ferromagnetic state. In this paper the effect of amorphization on critical temperature of ferromagnet is presented. The change of spontaneous magnetization depending on the temperature is observed, in a temperature range close to the critical temperature, and a critical temperature shift for different influences of nonhomogeneity of the interaction energy. The results are compared with results of other authors who deal with the same subject matter.
PREDICTION OF ELECTRON DRIFT VELOCITY IN HELICALLY COILED CARBON NANOTUBES
Authors: Popović Zoran P. , Vuković Tatjana , Nikolić Božidar , Damnjanović Milan , Milošević Ivanka
Published: December 2021

We studied electron transport in single wall carbon nanotubes placed in stationary homogeneous electric fields, oriented along tubes. Electron distributions for various electric fields are determined by solving stationary multi bands Boltzmann transport equation in presence of electron phonon scattering mechanisms. Contributions of all possible scattering channels, allowed by selection rules and energy conservation, are taken into account for finding scattering rate and collision integrals. As it is previously predicted, large electron drift velocities in straight single wall carbon nanotubes are obtained. Frequent electron scattering as well as low group velocity have strong impact on reduction of drift velocity in helically coiled carbon nanotubes.
MODIFIED POLYLACTIDE FILAMENTS FOR 3D PRINTING WITH IMPROVED MECHANICAL PROPERTIES
Authors: Slapnik Janez , Bobovnik Rajko , Mešl Maja , Bolka Silvester
Published: December 2021

We investigated the effects of two different types of impact modifiers, i.e. core-shell rubber and aliphatic polyester, on the mechanical and thermal properties of polylactide (PLA) filaments for 3D printing. First, PLA/impact modifier blends with various concentrations of impact modifiers were prepared by melt blending in a co-rotating twin screw extruder and test specimens by injection molding. The mechanical and thermal properties of blends were investigated by tensile and bending tests, dynamic mechanical analysis (DMA) and Charpy impact test. It was found that core-shell rubber remarkably improved Charpy impact strength at loadings above 5 wt % (up to 746 %). As shown by DMA, the PLA/10 wt % core-shell rubber blend exhibited better damping performance as compared to neat PLA over the whole examined frequency range, especially at high frequencies, which explained the increase in impact strength. The filament for a fused deposition modeling (FDM), 3D printer was prepared from blend with the highest impact strength (PLA/10 wt % core-shell rubber), whereas PLA and acrylonitrile-butadiene-styrene copolymer (ABS) filaments were used for reference. Test specimens were prepared by using a consumer FDM 3D printer. The mechanical and thermal properties were investigated by tensile and bending tests, DMA, Charpy impact test, and ultra-fast differential scanning calorimetry (Flash DSC). Specimens from PLA blend exhibited 109 % increase in Charpy impact strength as compared to neat PLA. In contrast to injection molded specimens, 3D printed PLA blend exhibited higher tensile E modulus than neat PLA, which was ascribed to improved interlayer adhesion. Moreover, DMA and Flash DSC analysis of 3D printed specimens showed an increase in the glass transition temperature as compared to injection molded specimens. This phenomenon was ascribed to reduction of free volume because of slow cooling in 3D printing process, which is also the reason for increased tensile E modulus of the PLA blend. All tested PLA, PLA blend and ABS filaments were in amorphous state as shown by Flash DSC analysis. Bending test showed an increased toughness of PLA blend in comparison to neat PLA and also higher toughness as compared to ABS. The modified polylactide (PLA/10 wt % core-shell rubber) filament thus combines easy processability of PLA filament and impact toughness of ABS filament.
RENEWABLES AND NEW MATERIALS
Authors: Đurović Momir , Đurović Siniša
Published: December 2021

Different types of new materials and their application in renewable energy sources are discussed. The new materials in Solar cells like perovskite, ferroelectric, organometallic, ceramic, as well as different technologies such as tandem, multi junction or concentrated are presented. Fuel cells in particular SOFC (Solid Oxide Fuel Cell) as well as new tendencies in membranes and electrodes have been discussed. The trends to use fiber and composites for the blades in wind power, concrete towers, methods for sealing and protecting from corrosion are given, too. Some aspects of new batteries like flow batteries, zinc-air and aluminum-ion batteries, tidal and wave energy are reported.
APPLICATION OF MATHEMATICAL MODEL OF NAIK FOR DETERMINATION OF TOTAL EXTRACT YIELD OF HYSSOP OBTAINED BY SUPERCRITICAL EXTRACTION WITH CARBON DIOXIDE
Authors: Mićić Vladan , Begić Sabina , Dugić Pero , Petrović Zoran
Published: December 2021

In this paper, supercritical extraction of hyssop (Hyssopus officinalis L.) is performed by using carbon dioxide as extractant. Effect of pressure (80, 100 and 150 bar) on the yield of total extract at a temperature 313 K, flow 0.00323 kg/min and the average diameter of particles 0.49 mm is investigated. For modeling of extraction system hyssop – supercritical CO2, Naik's model is applied, where in the total yield of extract is determined. On the basis of the value of the correlation coefficient |r| (0.976 – 0.992), it was concluded that a very strong correlation was obtained between reciprocal values of the total extract yield and extraction time (1/y i 1/t), so it can be concluded that Naik's model can succesfully be applied for determining yield of total extract.
THERMAL AND MECHANICAL PROPERTIES OF BIOCOMPOSITES BASED ON GREEN PE-HD AND HEMP FIBERS
Authors: Bolka Silvester , Slapnik Janez , Rudolf Rebeka , Bobovnik Rajko , Mešl Maja
Published: December 2021

Biocomposites of hemp fiber reinforced bio-based high density polyethylene (green PE-HD) were prepared using a maleic anhydride grafted styrene–ethylene/butylene–styrene (SEBS-g-MA) as a compatibilizer. Several compositions of biocomposites were prepared on a tween screw extruder using the full factorial design varying two factors with two levels. The mechanical and thermal properties of test specimens, prepared by injection molding, were investigated by tensile and bending tests, DMA, and ultra-fast differential dynamic calorimetry (Flash DSC). High stiffness and strength of biocomposites in comparison to neat green PE-HD indicate very good compatibility of the constituents. Stiffness of the samples without SEBS-g-MA is slightly higher than that of the samples with SEBS-g-MA. The thermal stability of biocomposites is for all samples drastically higher as compared to neat green PE-HD. The melting (Tm) and crystallization (Tc) temperatures of the biocomposites are shifted to higher temperatures. Incorporation of SEBS-g-MA together with hemp fiber into the matrix enhances strength, stiffness, impact strength and rises thermal stability. The novel biocomposites are suitable for applications such as technical parts, which require higher stiffness and thermal stability as compared to neat green PE-HD.
The Roles of WHO in Handling Yemen Humanitarian Crisis during the COVID-19 Pandemic
Authors: Andrini Ghita Fadhila
Published: December 2021

Yemen is noted to have the worst humanitarian crisis in the world. This condition is due to the civil war for the past six years, exacerbated by the COVID-19 pandemic, which emerged as a health security threat. This research aims to analyse the WHO’s role in responding health crisis in Yemen. By using qualitative methods and literature review approach, this article uses Atlas.ti to collect data regarding WHO’s activity in Yemen throughout the pandemic analysed by the international organisation’s role concept according to Clive Archer. The health security concept is also used to explain the health situation in Yemen during the pandemic. This research found accordance between WHO’s activities with Clive Archer’s idea of roles, mainly on its role as an independent actor to combat the health crisis in Yemen. However, the three roles are intertwined. As WHO has emphasised the importance of international aid to overcome Yemen’s health emergency, the writer recommends strengthening global solidarity with Yemen’s authority to improve health within the country.
Cave! Hic Dragones: Understanding Neocolonialism in China’s Economic Diplomacy towards Angola
Authors: Salsabila Ghina , Kusumawardhana Indra
Published: December 2021

China is experiencing a fast and dynamic phase of economic development driven by its fast pace of industrialisation. The vast energy demand has pushed China to import energy from other countries with plentiful natural resources. To this aim, China conducts economic diplomacy worldwide, including Angola, a country with plentiful natural resources in Africa. The main concern of this research is China's economic diplomacy which is considered as a form of neocolonialism in this globalisation era. Therefore, the research question of this research is why China's economic diplomacy towards Angola constitutes neocolonialisation. To this aim, this study utilises the Neocolonialism theory in dissecting China's Economic Diplomacy against Angola. This study uses qualitative method with a case study approach using secondary data. Thus, the basis for this research is the author's interpretation. This research concludes that China's economic diplomacy towards Angola constitutes neocolonialisation since the economic means that China exerts on Angola enables China to indirectly control Angola's politics, economy and natural resources, which in turn leads to Angola's dependence on China.
Muslim Community in the Atmosphere of Populism in Norway
Authors: Mahadika Gilang
Published: December 2021

In the European nations, there has been a lot of discussions and arguments regarding the community who have a ‘migration background’. Migrants nowadays are more capable of competing against local residents in terms of looking for better employment and participating in the political activities in European countries. Consequently, it creates fear within ‘mainstream’ society since it is presumably able to threaten their way of life. This interesting moment can benefit the populist political parties for gaining voices from the majority population. But, in the aftermath of 22/7 terror attacks in Norway, it also created tension between locals and those who are considered having a ‘migration background’. The people who have migration background, especially Muslim community, already has long history of migration to Norway. Therefore, the research question is how the Muslim community adapt to the situation of populism in Norway. By using historical literatures and research articles regarding the aftermath of 22/7 terror attack, it shows that the intersectional approach is useful to see the intermingled aspects of class, identity, religion, nationality, gender, and ethnicity of marginalised communities. These migrants now are facing multiple discriminations. Protests in the public sphere as a way of adapting to the atmosphere of populism are considered as their struggles for citizenship since the government seems to fail at managing multicultural society, especially advocating the minority groups. This kind of situation is common in the era of populism emerging in many countries targeting minority groups as political manoeuvre in order to gain voices among the ‘common’ society.
Determinantal representations for the number of subsequences without isolated odd terms
Authors:   Department of Mathematics, Kuwait University, Anđelic Milica , da Fonseca Carlos M. ,   Kuwait College of Science and Technology,   Chair of Computational Mathematics, University of Deusto
Published: December 2021

In this short note we propose two determinantal representations for the number of subsequences without isolated odd terms are presented. One is based on a tridiagonal matrix and other on a Hessenberg matrix. We also establish a new explicit formula for the terms of this sequence based on Chebyshev polynomials of the second kind.
A note on the Neyman–Rayner triangle
Authors:   Warrane College, The University of New South Wales, Shannon A. G.
Published: December 2021

This note raises questions for other number theorists to tackle. It considers a triangle arising from some statistical research of John Rayner and his use of some orthonormal polynomials related to the Legendre polynomials. These are expressed in a way that challenges the generalizing them. In particular, the coefficients are expressed in a triangle and related to known sequences in the Online Encyclopedia of Integer Sequences. The note actually raises more questions than it answers when it links with the cluster algebra of Fomin and Zelevinsky.
Factorizations of some lower triangular matrices and related combinatorial identities
Authors:   Nevşehir Hacı Bektaş Veli University, Köme Cahit
Published: December 2021

In this study, we investigate the connection between second order recurrence matrix and several combinatorial matrices such as generalized r-eliminated Pascal matrix, Stirling matrix of the first and of the second kind matrices. We give factorizations and inverse factorizations of these matrices by virtue of the second order recurrence matrix. Moreover, we derive several combinatorial identities which are more general results of some earlier works.
On Fibonacci quaternion matrix
Authors:   Pamukkale University, Halici Serpil , Deveci Ömür ,   Kafkas University
Published: December 2021

In this study, we have defined Fibonacci quaternion matrix and investigated its powers. We have also derived some important and useful identities such as Cassini’s identity using this new matrix.
On k-Fibonacci hybrid numbers and their matrix representations
Authors:   Yildiz Technical University, Faculty of Chemical and Metallurgical Engineering, Torunbalcı Aydın Fügen
Published: December 2021

In this paper, k-Fibonacci hybrid numbers are defined. Also, some algebraic properties of k-Fibonacci hybrid numbers such as Honsberger identity, Binet Formula, generating functions, d’Ocagne identity, Cassini and Catalan identities are investigated. In addition, we also give 2 × 2 and 4 × 4 representations of the k-Fibonacci hybrid numbers HF_{k,n}.
Fibonacci-Zeta infinite series associated with the polygamma functions
Authors:   Obafemi Awolowo University, Adegoke Kunle , Ghosh Sourangshu ,   Department of Civil Engineering, Indian Institute of Technology
Published: December 2021

We derive new infinite series involving Fibonacci numbers and Riemann zeta numbers. The calculations are facilitated by evaluating linear combinations of polygamma functions of the same order at certain arguments.
Foot Loading Analysis of Intraarticular Tibia Pilon Fracture
Authors: Agar Anil , ŞAHİN Adem , Guclu Seyit Ali , Gülabi Deniz , Erturk Cemil
Published: December 2021

BACKGROUND: Although pilon fractures are rare, they are important for orthopedic surgeons because of the difficulty of treatment and adverse effects on gait function. The aim of the study to evaluate the relationship between the reduction quality of the fracture, functional results, ankle arthrosis and plantar pressure distribution in patients with tibia pilon fractures. METHODS: In this study, a total of 62 patients treated for an intraarticular pilon fracture in our clinic between January 2015 and January 2019 were evaluated retrospectively. Postoperative reduction qualities of the patients were evaluated with the Ovadia-Beals criteria, ankle functional scores with the Teeny-Wiss score, and ankle arthrosis with the Takakura classification. In the last follow-up of the patients, foot loading analysis was performed and the results of the patients were evaluated for their relation with postoperative reduction quality, ankle functions and ankle arthrosis. RESULTS: There were 62 patients (50 men and 12 women). The average age was 43.3 years (range 19-78). The mean follow-up was 34.3 months (range 24 - 58). The mean Ovadia-Beals score was 12.35 {plus minus} 4.6 in the postoperative plain radiographs of the patients; the mean Teeny-Wiss score in the last follow-up was 76.82 {plus minus} 17.69, and the Takakura score was 1.47 {plus minus} 1.35. Based on the pedobarographic measurements, 47.58% of the patients put weight on the anterior and 52.42% on the posterior of the foot in the anteroposterior plane. In the mediolateral plane, 42.15% loaded on the medial of the ankle and 57.85% loaded on the lateral of the foot. CONCLUSION: Intra-articular tibia pilon fractures can be demonstrated by lateralization of the walking axis and changes in gait patterns and can be associated with clinical outcome.
On a Continuum of Roles: Women as Key Socialization Actors of Other Women in Al-Shabaab
Authors: Nijenhuis Eva Luna
Published: December 2021

In current research the role of women in terrorist organizations has remained largely underexposed. This article responds to the call to draw attention to the active women's role in terrorist organizations by uncovering how women in terrorist organizations, specifically Al-Shabaab,
socialize with other women who enter or change roles within the organization. This has been done through a literature review, which integrates the insights drawn from papers on the role of women in terrorist organizations with current knowledge on organizational socialization. The research
shows that women are active in a wide array of roles and that they should not only be viewed as passive victims. Furthermore, women already familiar with the terrorist organization are especially important for the socialization of female newcomers and their role in maintaining the terrorist
organization should not be ignored. The article also sheds light on how the theory of organizational socialization could be improved. As the results provide a better understanding on how socialization might differ depending on the degree of autonomy the newcomer has and what insights it might
provide for other criminal organizations.