bluuebunny/crossref_metadata_2025 huggingface dataset:
International Short-Term Immersion Study Tours: Gen Z, Curriculum, and Trauma-Informed Tours
Authors: Squillace Joseph , Cassell Adam
Published: January 2022

With rapid globalization and increased connection among people of the world in the 21st century, embedding global education in the curriculum is now key for interactions in the pluralistic world of today. short-term study abroad programs combine global curriculum with experiences in international settings. However, certain factors in our contemporary world may discourage faculty from considering running these courses. This article seeks to provide educators and college administrators with information about important logistics and curriculum to consider when planning and taking Gen Z’ers on a short-term study tour program, including incorporating trauma-informed concepts. This paper provides creative ways for faculty to develop short-term study tour courses, and integrates ways to assist a population of students (Gen Z’ers) that older faculty members may not be able to fully “relate” to, as well as ways to be cost-efficient and inclusive.
Action Learning and professional formation of youth and community work students
Authors: Flett Julie , Tyler Mary
Published: January 2022

This paper follows 3 cohorts of students 2012 -2015  and maps their perceptions of professional development using Action Learning sets as a pedagogical tool . It looks at learning immediately after the Sets have taken place and builds on this up to 3 years after graduating.  The research  found that Action Learning Sets as a pedagogical tool make a valuable contribution to professional formation of youth and community workers by enabling participants to:Consolidate learning  from the courseBecome more confident and assertive about their professionalizationReflect together on practice as a learning community and learn about themselves within the group process  Understand how and when to use appropriate questions to enable reflection by othersUnderstand different ways people perceive issues, their different thought processesCritically understand the importance and benefits of opening up people's thinking/gaining new perspectivesBe open and willing to listen, best for developing relationships Learn to listen in order to understand others and in so doing developing self-knowledge and problem solving skills.Practise some educator / facilitator skills Action Learning Sets outcomes appears especially important where they  helped students develop confidence in their professional identity and in their ability to challenge to achieve recognition and change. However some participants discussed how an organisational culture that is not based on critically reflecting or even discussing professional approaches has impacted negatively on them as developing youth work professionals, echoing Stark’s (2006) similar findings from research on the impact of Sets used with nurses and educators. Many students  commented that there was no supervision in the workplace and no mechanism for group reflective learning so individuals were left to self-reflect without the benefit of alternative perspectives which they had come to value as a result of taking part within the Sets. This implied  a desire on the graduates’ part for continuing professional development . Further research into  critically reflective practice using action learning sets in the workplace could be explored within organisations and any demand developed within HE programmes .
Review of: Helping Vulnerable Children and Adolescents to Stay Safe
Authors: McQuade Andrew
Published: January 2022

Review of this book
Disability Competency in Social Work Education: Tools for Practice Teaching
Authors: Goulden Ami
Published: January 2022

Social work education has been slow to integrate the intersectionality of disability, even though the prevalence of social work practice with disabled persons is increasing. The profession has historically prescribed to a medical model of disability and struggles with how best to support service users in the disability community. Social workers’ attitudes toward disabled persons is an essential component to the rapport and working relationship with persons with disabilities. As most social work graduates will encounter persons with disabilities in their practice, training and field education must incorporate assessment tools to assist in student evaluations with this population. Evidence suggests that field instructors need additional assessment tools for evaluating students’ preparedness for the field (Vinton & Wilke, 2011). This paper has three objectives: 1) to review disability competence within the social work profession in the North American context, 2) to compare the validity, practicality, and theoretical frameworks of two disability attitudinal scales as potential assessment tools for student evaluations, and 3) to offer recommendations for the implication of social work education and practice.
Assessing Social Work Students On Practicum at the United Arab Emirates University (UAEU): Challenges and Implications.
Authors: Abu Sarhan TAGHREED MAHMOUD , Tedam Prospera
Published: January 2022

Assessing Social Work Students On Practicum at the United Arab Emirates University (UAEU): Challenges and Implications. Dr. Taghreed M. Abu Sarhan¹ (Director of Field Education)Dr Prospera TedamSocial Wellbeing Dept. UAEUContact: abusarhan@uaeu.ac.aeAbstractThe Social Work program at the United Arab Emirates University (UAEU) is the first and the only program-training students for Masters in Social Work (MSW) in the United Arab Emirates. MSW students are required to undertake 500 hours of practice in the field MSW while Bachelor in Social Work (BSW) students are required to complete 400 hours of practicum.This paper outlines both BSW and MSW practicum courses and examines the assessment tools and methods that contribute to their readiness for practice upon qualifying.  The authors explore the framework in practicum settings in the UAE and critically reflect on the challenges of the current assessment methods in preparing professional social workers for practice upon graduation. The absence of service user contribution in the assessment process is considered a major disadvantage to the holistic development of social workers in the UAE and will be examined.  Significantly, the two authors who are both female address the issue of gender within the context of assessment due to gender segregation in field practicum linked to the cultural and religious requirements in the UAE.  The paper concludes with a number of recommendations to improve the assessment of social work students at both BSW and MSW levels at the United Arab Emirates University.Keywords: Social Work, Practicum, UAEU, Assessment methods, BSW and MSW.
Attempting to disrupt racial division in social work classrooms through small-group activities
Authors: Cane Tam
Published: January 2022

Abstract

The notion of racial difference and racial segregation has continued to be problematic in higher education studies. Students belonging to Ethnic Minority groups often feel segregated even in courses and classrooms that promote anti-discriminatory and anti-racist practices. This paper presents a study that investigated seventy-five students from the BA and MA student cohorts within a London-based university. Students were encouraged to integrate and interrogate matters of race and belonging during a seminar on protected characteristics designed to disrupt racial division. Qualitative surveys were conducted to understand participants' views about racial disruption and experiences after the activities. Findings revealed ongoing segregation after the activity in and out of the classroom, fear of approaching racialised spaces, the need for additional brave reflective spaces that disrupt racial segregation and foster better understanding about race. The paper concludes by stressing the significance and value of racially disruptive teaching activities and racial assimilation in social work programmes as a means of tackling racial bias, segregation and decolonisation.
Twelve tips to facilitate Interprofessional Education and Collaborative Practice with students on placements in healthcare settings
Authors: Martin Priya , Sy Michael
Published: January 2022

It is acknowledged that the adverse effects of the COVID-19 pandemic will be long-lasting on healthcare organisations. Consequently, healthcare teams will need to work more collaboratively, supporting each other better in the post-pandemic period. Pre-registration clinical placements in healthcare settings provide an ideal opportunity to instil Interprofessional Education and Collaborative Practice (IPECP) skills, values, and competencies in students early-on. It is a common belief that teams need to have students from two or more professions to facilitate IPECP. Whilst this may be the ideal scenario, healthcare settings were struggling even prior to the pandemic to orchestrate such placement opportunities given the complicated logistics and their resource-intensive nature. This 12 tips paper provides clinical educators with practical tips to facilitate IPECP across the whole continuum from a single student on placement, to several students from two or more professions on placement at the same time. These tips, by promoting IPECP in all student placements, have the potential to re-energise IPECP in healthcare settings, thereby contributing to better outcomes for healthcare professionals, organisations, and service users.
Group supervision for social work students on placement
Authors: McCafferty Paul
Published: January 2022

Partnership Care West is a voluntary organisation that contracts with the Northern Ireland Social Care Council (NISCC) to provide ten placements for social work students. NISCC is a statutory organisation, with responsibility for registering and regulating social care/work, improving standards in education and training and standardising practice in Northern Ireland NISCC (2003).The students attend the practice learning centre and are then given placements in voluntary sector sites established by the centre. Traditionally, the students were supervised on a one to one basis using the long arm approach. In recent years however, the centre has developed a model for supervising these students in groups.Building on my positive experience of conducting group supervision and to further my knowledge, skills and values in this area, I recently undertook an international comparison with the School of Social Work in Haifa Israel. This School has an already well established model for supervising students in groups and I hoped that I could learn something to help me develop my model further. I would like to thank Nava Arkin at the University of Haifa for her willingness to take part in this comparison and for her encouragement throughout. This article aims to outline my findings of the comparison and outline the theoretical constructs that make international comparisons in social work possible.
TÜRKÇEDE HAYVAN ADLARI 2: TÜRKÇE SÖZLÜK’TEKİ TEMEL SÖZLÜKBİRİMLER BAĞLAMINDA HAYVAN ADLARININ YANANLAMSAL-ÇAĞRIŞIMSAL GÖNDERMELERİ
Authors: ÖZEZEN Muna Yüceol
Published: January 2022

Bu çalışma, Türkiye Türkçesindeki göndermesi hayvan olmayan hayvan adları üzerine hazırlanmıştır. Çalışmanın evrenini Türk Dil Kurumu tarafından 2011 yılında basılan Türkçe Sözlük’ün, içerisinde hayvan adı geçen ancak göndermeleri hayvan adı (veya sıfatı) olmayan sözlükbirimler oluşturmaktadır. Örneklemde ise 958 sözlükbirim yer almaktadır. Bütünlüklü bir veriyi paylaşma ve değerlendirme iddiasıyla hazırlanan bu çalışma, hayvan adlarının ve hangi hayvanlara hangi adların nasıl verildiğinin incelenmesini içermemektedir. Çalışma hayvan adlarının yananlamsal ve çağrışımsal içeriklerini, bu adların hayvan evreninin oluşması dışındaki işlevlerini, Türk kültürünün kodlanmasındaki ve Türk kavrayış sistemindeki yerlerini ortaya çıkarmayı amaçlamaktadır. Bu bakımdan çalışma aynı zamanda bir sözlükbilimsel antropoloji (ve bir yanıyla da) bir toplumdilbilim çalışmasıdır.
Contributos para a Validação da Versão Portuguesa do EQ-5D
Authors: Ferreira Pedro Lopes , Ferreira Lara Noronha , Pereira Luis Nobre
Published: January 2022

Introdução: O EQ-5D permite a junção de duas componentes essenciais de qualquer medida de qualidade de vida relacionada com a saúde a ser usada em avaliações económicas de custo-utilidade: (i) um perfil descrevendo o estado de saúde em termos de domínios ou dimensões; e (ii) um valor numérico associado ao estado de saúde anteriormente descrito.Objectivo: A versão portuguesa do questionário EQ-5D foi finalizada em 1998, com base em normas de orientação definidas pelo Grupo EuroQol, incluindo os procedimentos de tradução e retroversão. Apesar da sua larga utilização em Portugal, até agora ainda não tinham sido publicados os estudos que conduziram inicialmente à versão portuguesa e à garantia de aceitabilidade, fiabilidade e validade. O propósito do presente artigo é, assim, documentar estes primeiros valores referentes à versão portuguesa do EQ-5D.Material e Métodos: Foram utilizadas três amostras diferentes: uma primeira com 1.500 indivíduos representativa da populaçãoportuguesa; uma segunda com 140 indivíduos apenas destinada ao teste da fiabilidade; e uma terceira amostra com 643 indivíduos doentes com cataratas, asma, doença pulmonar obstrutiva crónica ou artrite reumatoide.Resultados: A aceitabilidade foi avaliada pelo número de respostas em falta. Foi também encontrado um marcado efeito de teto com grande parte da amostra a não reportar quaisquer problemas nas dimensões do EQ-5D.Discussão: A validade de construção foi testada pela análise do grau com que valores baixos de EQ-5D estavam positivamente associados ao aumento da idade, ao ser do sexo feminino, e ao estar doente, assim como a valores de dimensões da escala SF-36v2. A validade convergente foi baseada nas correlações entre valores do EQ-5D e outras escalas específicas de condição de saúde. O EQ-5D apresentou correlações moderadas a altas com outras medidas de estado de saúde e de qualidade de vida relacionada com a saúde, específicas de cada doença.Conclusão: A versão portuguesa do EQ-5D tem uma boa aceitabilidade, fiabilidade e validade na medição do estado de saúde.
The Role of High Flow Nasal Oxygen in the Management of Severe COVID-19: A Systematic Review
Authors: Paraskevas Themistoklis , Oikonomou Eleousa , Lagadinou Maria , Karamouzos Vasileios , Zareifopoulos Nikolaos , Spyropoulou Despoina , Velissaris Dimitrios
Published: January 2022

Introduction: Oxygen therapy remains the cornerstone for managing patients with severe SARS-CoV-2 infection and several modalities of non-invasive ventilation are used worldwide. High-flow oxygen via nasal canula is one therapeutic option which may in certain cases prevent the need of mechanical ventilation. The aim of this review is to summarize the current evidence on the use of high-flow nasal oxygen in patients with severe SARS-CoV-2 infection.Material and Methods: We conducted a systematic literature search of the databases PubMed and Cochrane Library until April 2021 using the following search terms: “high flow oxygen and COVID-19” and “high flow nasal and COVID-19’’.Results: Twenty-three articles were included in this review, in four of which prone positioning was used as an adjunctive measure. Most of the articles were cohort studies or case series. High-flow nasal oxygen therapy was associated with a reduced need for invasive ventilation compared to conventional oxygen therapy and led to an improvement in secondary clinical outcomes such as length of stay. The efficacy of high-flow nasal oxygen therapy was comparable to that of other non-invasive ventilation options, but its tolerability is likely higher. Failure of this modality was associated with increased mortality.Conclusion: High flow nasal oxygen is an established option for respiratory support in COVID-19 patients. Further investigation is required to quantify its efficacy and utility in preventing the requirement of invasive ventilation.
A Rare Case of Mucormycosis in the Scalp
Authors: Harman Mehmet , Uçmak Derya , Dal Tuba
Published: January 2022

Introduction: Mucormycosis is a rapidly progressive and frequently lethal form of fungal infection. Primary cutaneous form is rare. We presented a case of cutaneous mucormycosis in the scalp which led to visual loss in a 54-year-old diabetic woman.Case Presentation: A 54-year-old woman patient was admitted with the complaining of the wound with purulent discharge in the scalp. An ulcerated discharging lesion with necrotic hemorrhagic crusts in the left parietal region of the scalp and wheals with fluctuating from this lesion to the left periorbital area were observed. Biochemical investigations revealed elevated blood sugar level and urine ketone bodies were present. The patient had vision loss in the left eye. In the smears thick-walled non-septate hyphae were detected. Rhizopus spp. was isolated from culture. Antidiabetic therapy and liposomal amphotericin B was initiated. The scalp lesion improved.Conclusion: Early diagnosis is life saving in mucormycosis.
Reinternamentos Hospitalares em Portugal na Última Década
Authors: Sousa-Pinto Bernardo , Gomes Ana Rita , Oliveira Andreia , Ivo Carlos , Costa Gustavo , Ramos João , Silva Joel , Carneiro Maria Carolina , Domingues Maria João , Cunha Maria João , Costa-Pereira Altamiro da , Freitas Alberto
Published: January 2022

Introdução: Os reinternamentos hospitalares estão associados a um incremento das despesas com a saúde e da mortalidade intrahospitalar. Neste trabalho, pretende-se caracterizar os reinternamentos hospitalares não-planeados, ocorridos num período de 30 dias após alta, de acordo com a sua Grande Categoria Diagnóstica, contexto hospitalar e características demográficas dos utentes, bem como estimar as taxas de mortalidade associadas. Pretende-se também estudar a evolução da taxa de reinternamentos na última década (2000-2008). Procurar-se-á ainda caracterizar os reinternamentos por insuficiência cardíaca.Material e Métodos: Procedeu-se à análise estatística da base de dados de internamentos hospitalares públicos fornecida pelaAutoridade Central do Sistema de Saúde. Recorreu-se aos testes do qui-quadrado e de tendência para comparação de taxas dereinternamentos.Resultados: Das 5 514 331 hospitalizações não-planeadas no período em estudo, 4,1% corresponderam a reinternamentos hospitalares. Entre 2000 e 2008, a taxa de reinternamentos hospitalares aumentou continuamente de 3,0% para 4,7%. A mortalidade hospitalar foi significativamente maior entre os episódios de reinternamento (9,5%) do que nos restantes episódios (5,6%), p < 0,001. A taxa de reinternamentos foi significativamente maior em homens (4,5% versus 3,9% nas mulheres, p < 0,001) e doentes mais velhos (2,6% nas crianças e 5,3% nos idosos), sendo menor na região de Lisboa (2,7%) e nos hospitais centrais (3,0%, p < 0,001). Para os episódios de insuficiência cardíaca, foi obtida uma taxa de reinternamentos de 6,7%.Discussão e Conclusão: Em termos gerais, as diferenças encontradas são similares às descritas noutros Países Ocidentais. Os episódios de reinternamento, cujas taxas têm vindo a aumentar em Portugal, estão associados a maior mortalidade intra-hospitalar.
Hospital Admissions for Herpes Zoster in Portugal Between 2000 and 2010
Authors: Mesquita Margarida , Froes Filipe
Published: January 2022

Introduction and Objectives: Herpes zoster and post-herpetic neuralgia increasing incidence is related to ageing. These conditions can be very debilitating and have an important impact in patients’ quality of life. In an ageing population like the Portuguese, is expectedthat the burden of herpes zoster and post-herpetic neuralgia rises, nevertheless, a specific surveillance system for zoster does not exist in the country, and data regarding the incidence of herpes zoster and the burden of the disease in Portugal in the last decadeswas not found. In Portugal, the vaccine is still not available. Scaling the burden of disease is important to support public health policies regarding zostervaccination.Material and Methods: We carried out a retrospective analysis from encoded information from the Portuguese Ministery of Health database for hospital admissions which included all individuals with a primary diagnosis of Herpes Zoster (IDC-9-CM 053), who were discharged between 2000 and 2010.Results: In Portugal, between 2000 and 2010, 1 706 hospital admissions with primary diagnosis of herpes zoster occurred. The majority of the patients were elderly. Eleven percent of the patients had potentially severe immunocompromise. The predominant diseasewas uncomplicated herpes zoster, followed by nervous system and ophthalmic herpes zoster. Mean hospital stay length was 9.3 days, increasing with age. There was a 1% case fatality rate. Considering the 2000-2009 period and the adult population only, the averageannual incidence rate of hospitalization with primary diagnosis of herpes zoster in Portugal was 1.9/100 000 inhabitants, increasing with age.Conclusion: This study confirms that, in Portugal, severe herpes zoster is related to ageing and associated with significant morbidity, mortality and health resources allocation.
231 Colecistectomias Laparoscópicas em Ambulatório: Que Resultados?
Authors: Goulart André , Delgado Margarida , Antunes Maria Conceição , Braga dos Anjos João
Published: January 2022

Introdução: A colecistectomia laparoscópica é actualmente o gold standard no tratamento da patologia litiásica vesicular e colecistite aguda. A sua realização em regime de cirurgia de ambulatório permanece em discussão. O presente estudo tem por objectivo analisar a qualidade e segurança das colecistectomias laparoscópicas realizadas pela Unidade de Cirurgia de Ambulatório do Hospital de Braga e comparar os resultados com outros centros europeus que realizam colecistectomia laparoscópica em regime de ambulatório.Material e Métodos: Estudo observacional prospectivo de doentes submetidos a colecistectomia laparoscópica em regime de ambulatório durante 26 meses. Foram recolhidos dados referentes à demografia do doente, complicações peri e pós-operatórias, tempo cirúrgico e tempo de permanência no recobro e internamentos não programados.Resultados: Foram submetidos a colecistectomia laparoscópica em regime de ambulatório com pernoita (alta < 24h) 231 doentes. Três doentes tiveram intercorrências intra-operatórias com necessidade de conversão para laparotomia e quatro doentes foram internados após a cirurgia. O tempo médio de cirurgia foi de 58 minutos e o tempo médio de recobro de 19h19m. A morbilidade pósoperatória foi de 7,8% tendo, ocorrido dois internamentos não programados.Discussão: Uma das discussões que existe em torno da colecistectomia laparoscópica em regime de ambulatório é a necessidade de vigilância hospitalar durante a primeira noite após a cirurgia. Na nossa unidade, iniciamos a realização da colecistectomia laparoscópica em regime de ambulatório com pernoita hospitalar. Os resultados de mais de dois anos e 231 doentes operados a colecistectomia laparoscópica mostram que é uma técnica perfeitamente segura em regime de ambulatório.Conclusões: Os dados do estudo mostram que a colecistectomia laparoscópica é uma técnica segura em regime de ambulatório, com resultados semelhantes comparativamente com outros centros europeus.
Odds Ratio: Reflexão sobre a Validade de uma Medida de Referência em Epidemiologia
Authors: Aguiar Pedro , Nunes Baltazar
Published: January 2022

Introdução: É importante rever a validade do Odds Ratio como medida de associação e efeito, assim como, qual o viés introduzido pelo Odds Ratio quando este representa uma razão de riscos ou uma razão de prevalências em situação de doença mais frequente.Material e Métodos: Simulámos numa coorte de 200 indivíduos com 100 expostos e 100 não expostos a um fator de risco, um cenário de doença rara e outro de doença mais frequente, com razão de riscos igual em ambos os cenários. Determinaram-se o Odds Ratio e o Risco Relativo pelo método clássico (padrão) e respectivamente por regressão logística e regressão de Poisson. Introduziu-se de seguida uma variável de confundimento e determinaram-se o Odds Ratio e o Risco Relativo pelo método de Mantel-Hanszel (análise estratificada padrão) e respectivamente por regressão logística e regressão de Poisson. As análises estatísticas foram efectuadas em SPSS V20.Resultados: Para a doença rara, o Odds Ratio aproximou-se do Risco Relativo. Quando a doença foi mais frequente, o Odds Ratio sobrestimou o Risco Relativo. Nesta situação, e com a presença de uma variável de confundimento, o Risco Relativo ajustado por regressão de Poisson permitiu obter estimativas mais válidas da razão de riscos que o Odds Ratio ajustado por regressão logística. Os intervalos de confiança do Risco Relativo estimado por regressão de Poisson foram sempre mais largos que os determinados por análise de Mantel-Hanszel.Conclusões: O Odds Ratio e a regressão logística múltipla são procedimentos válidos em estudos caso-controlo e em estudosprospetivos e transversais de natureza exploratória. O Odds Ratio não deve ser interpretado como uma razão de riscos ou razão de prevalências se o resultado de saúde não é raro. A análise de regressão múltipla de Poisson deve ser considerada como alternativa válida à regressão logística múltipla, especialmente em estudos de uma exposição específica.
The Importance of Zebrafish in Biomedical Research
Authors: Tavares Bárbara , Santos Lopes Susana
Published: January 2022

Introduction: Zebrafish (Danio rerio) is an ideal model organism for the study of vertebrate development. This is due to the large clutches that each couple produces, with up to 200 embryos every 7 days, and to the fact that the embryos and larvae are small, transparent and undergo rapid external development.Material and Methods: Using scientific literature research tools available online and the keywords Zebrafish, biomedical research, human disease, and drug screening, we reviewed original studies and reviews indexed in PubMed.Results: In this review we summarized work conducted with this model for the advancement of our knowledge related to several human diseases. We also focused on the biomedical research being performed in Portugal with the zebrafish model.Discussion: Powerful live imaging and genetic tools are currently available for zebrafish making it a valuable model in biomedicalresearch. The combination of these properties with the optimization of automated systems for drug screening has transformed the zebrafish into a “top model” in biomedical research, drug discovery and toxicity testing. Furthermore, with the optimization of xenografts technology it will be possible to use zebrafish to aide in the choice of the best therapy for each patient.Conclusion: Zebrafish is an excellent model organism in biomedical research, drug development and in clinical therapy.
Qual é o Impacto da Redução da Ingestão de Sal na Pressão Arterial? Análise da Revisão Sistemática Cochrane “Effect of longer-term modest salt reduction on blood pressure. He FJ, Li J, Macgregor GA. Cochrane Database Syst Rev. 2013 Apr 30;4:CD004937.
Authors: Caldeira Daniel , Vaz-Carneiro António , Costa João
Published: January 2022

No presente artigo avaliamos e comentamos a Revisão Sistemática da Cochrane “Effect of longer-term modest salt reduction on blood pressure. Cochrane Database Syst Rev. 2013 Apr 30;4:CD004937”.Questão Clinica: Qual o impacto a longo prazo (≥ 4 semanas) da restrição moderada de ingestão de sal na pressão arterial.Conclusões: Esta revisão sistemática concluiu que a restrição moderada de ingestão de sal (redução média -4,4 g por dia) diminuide forma significativa a pressão arterial (PA) em indivíduos normotensos (-2,42 mmHg PA sistólica; -1,00 mmHg PA diastólica) ou com hipertensão arterial (-5,39 mmHg PA sistólica; -2,82 mmHg PA diastólica). Verificaram-se ligeiros aumentos da actividade da renina plasmática, aldosterona e norepinefrina. Contudo, não se identificaram alterações significativas do perfil lipídico.
One-pot electrochemical fabrication of SnO-reduced graphene oxide electrodes for amperometric sensing of dopamine
Authors: Öztürk Doğan Hülya , Kurt Urhan Bingül , Öznülüer Özer Tuba , Demir Ümit
Published: January 2022

In this study, the preparation of tin(II) oxide/reduced graphene oxide (SnO/rGO) hybrid electrodes was simultaneously performed by a one-pot electrodeposition process for the first time by using a single cell. The morphological and structural characterizations of SnO/rGO were performed by scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Additionally, the electrocatalytic activities of the electrode materials for the determination of DA were tested by the linear sweep voltammetry technique. Furthermore, the amperometric sensing of DA was carried out with a detection limit of 0.32 µM. The results suggest that our fabricated biosensor exhibited an ultrahigh sensitivity, low detection limit, and excellent selectivity.
Evidências deposicionais e/ou erosivas em dois setores do arco praial Joaquina - Morro das Pedras, ilha de Santa Catarina, SC, Brasil
Authors: Gomes Gabriel de Oliveira , Filho Norberto Olmiro Horn , Moresco Bruna Suely
Published: January 2022

O arco praial Joaquina - Morro das Pedras, localizado na margem Leste da ilha de Santa Catarina, SC, Brasil, apresenta, ao longo de sua extensão, dois setores com praias sob distintos modos de uso e ocupação dos ambientes de deposição marinho praial e eólico, indicando evidencias de acentuação de processos erosivos costeiros nos locais mais povoados. Neste estudo, ao longo de 16 meses, coletaram-se dados sobre a hidrodinâmica, morfologia, granulometria, padrões de ventos e correntes litorâneas em seis perfis praiais, três em cada praia, uma praia por setor, no intuito de comparar os efeitos da ocupação humana na linha costeira de cada local. No setor Sul, praia do Campeche, com elevado adensamento populacional, é possível notar severos problemas associados à erosão costeira, confirmados pela perda sedimentar observada de -40,1 m³/m durante o estudo. No mesmo período a praia do Rio Tavares, setor Norte, onde as dunas estão preservadas e mantidas, foi possível notar um acréscimo sedimentar de 43,8 m³/m. Estes dados, associados às taxas de variação da linha de costa calculados, mostram que a urbanização dos locais estudados pode ter afetado as características sedimentares naturais, gerando recuo da linha de costa a taxas que podem alcançar até -1,60 m/ano.
Unidades geomorfológicas da planície aluvial do Médio Rio São Francisco, Nordeste do Brasil
Authors: Santos Landerlei Almeida , Latrubesse Edgardo Manuel
Published: January 2022

O rio São Francisco é o maior rio que drena as áreas cratônicas das savanas do Cerrado, e ambientes semiáridos da Caatinga no Nordeste do Brasil. Este estudo apresenta o primeiro mapa geomorfológico do Médio rio São Francisco e descreve as principais unidades morfosedimentares da planície aluvial. O uso de imagens de satélite de alta resolução, modelos digitais de elevação, dados de poços de estudos anteriores e descrições de campos morfosedimentares foram os procedimentos aplicados. Oito unidades geomorfológicas foram reconhecidas. A unidade classificada como Planície impedida é a mais rica em termos de diversidade de feições geomorfológicas, e foi subclassificada em sete subunidades morfosedimentares. Pelo menos três estágios fluviais devem ser responsáveis pela construção do atual mosaico de morfologias exibidas na planície de inundação. É provável que o canal entrelaçado seja o tipo de sistema mais antigo atuado na região e tenha deixado marcas na planície preservada. Posteriormente, um importante estágio mais úmido induziu uma mudança no comportamento do rio principal para um tipo multicanal, responsável pelas principais características da corrente observada. Finalmente, o estágio atual, mais seco, com menor vazão do rio, controlou o desenvolvimento da planície de inundação de acreção das margens e da planície de inundação fluvial-eólica durante o Holoceno tardio. Portanto, essas variações paleohidrológicas do rio São Francisco devem ter um papel fundamental na construção da complexa e relicta planície do Médio rio São Francisco.
Applications of in situ electron microscopy in oxygen electrocatalysis
Authors: Wu Zhi-Peng , Zhang Hui , Chen Cailing , Li Guanxing , Han Yu
Published: January 2022

Oxygen electrocatalysis involving the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) plays a vital role in cutting-edge energy conversion and storage technologies. In situ studies of the evolution of catalysts during oxygen electrocatalysis can provide important insights into their structure - activity relationships and stabilities under working conditions. Among the various in situ characterization tools available, in situ electron microscopy has the unique ability to perform structural and compositional analyzes with high spatial resolution. In this review, we present the latest developments in in situ and quasi-in situ electron microscopic techniques, including identical location electron microscopy, in situ liquid cell (scanning) transmission electron microscopy and in situ environmental transmission electron microscopy, and elaborate their applications in the ORR and OER. Our discussion centers on the degradation mechanism, structural evolution and structure - performance correlations of electrocatalysts. Finally, we summarize the earlier discussions and share our perspectives on the current challenges and future research directions of using in situ electron microscopy to explore oxygen electrocatalysis and related processes.
Analysis the impact of sun outage and satellite orbit at performance of the telkom 3S satellite communication system
Authors: Utami Vi Bauty Riska , MPB Imam , Romadhona Shinta
Published: January 2022

Satellites of communication are located at altitude of thousands kilometers above the earth's surface, so the signal is transmitted by satellite to earth station is very susceptible to interference. Every March and September equinox or when the sun crosses the Earth's equator for several days, earth station occurs a naturally interference called by sun outage. At this time, satellite and the sun reach the closest distance because satellite's position is same direction with the sun. This interference makes the signal received by earth station weaken and even disappears due to temperature noise which increases drastically. Loss of signal on the downlink side caused by noise greatly affects to the performance of satellite communication system. This study aims to analyze the effect of sun outage and satellite orbit to determine sun outage period on the performance of Telkom 3S satellite communication system. The results obtained that indicate the signal quality is represented by degradation in the Carrier to Noise Ratio (C/N) from 14,777 dB to 6,0 dB, Energy bits per Noise Ratio (Eb/No) from 11,515 dB to 2,738 dB, and increase the Bit Error Rate (BER) from 8,29×10-7 to 11,08×10-3. In addition, sun outage makes lost of satellite communication traffic and affecting link availability to 99,855324%. Meanwhile, the result from satellite orbit calculation for sun outage period based on ITU-R S.1525 standard and based by satellite’s handbook.

 

Keywords – Telkom 3S satellite, sun outage, C/N, Eb/No, BER, link availability, sun outage period.
Usability and user satisfaction rate evaluation on e-learning application from student's perspective using Nielsen usability method
Authors: Sibarani Alexander J P
Published: January 2022

Covid-19 is a new and contagious disease that has spread throughout the world community. This disease has spread to Indonesia since early March 2020. One way to prevent the spread of this virus is by implementing activities from home. Budi Luhur University is one of the educational institutions that has implemented work and learning from home during the Covid-19 pandemic. In the teaching and learning process, the E-Learning application is the main tool used both from the faculty and student sides. The total and urgent implementation of E-Learning application which began in March 2020 caused several problems that reduced the comfort of students in carrying out learning process. The purpose of this study is to measure the level of student satisfaction and the level of use of the E-Learning application and its features. This study used a survey sampling method by distributing questionnaires and getting results from 115 respondents. The method used in this research is the Nielsen Usability method. Measurements were made using five criteria: Learnability, Memorability, Efficiency, Errors, and Satisfaction. Result show, although the average of each dimension is in the satisfied interpretation, there are significant differences in the level of satisfaction in each dimension. The dimension with the lowest average rating is the Errors dimension. This shows that respondents still find some errors when using the E-Learning application so that respondents do not show significant satisfaction in terms of the Errors dimension. In other side, result shows that the respondent thinks face-to-face meetings are still needed.
Graphene Prepared via the Dry Ice in Flames Method and its Purification Using Different Routes: A Comparative Study
Authors: Cuadros-Lugo Eduardo , Martinez-Rodríguez Harby A. , Lardizabal-Gutiérrez Daniel , Estrada-Guel Ivanovich , Herrera-Ramirez Jose M. , Carreño-Gallardo Caleb
Published: January 2022

Although the dry ice method used to synthesize exfoliated graphite/graphene is little known and used, it has significant advantages over others: it is low cost, simple, and a large quantity of material can be obtained using some inorganic and highly available acids (which can be reused). Despite the above advantages, the main reason for its incipient development is the resulting presence of magnesium oxide in the final product. In the present work, three different treat-ments were tested to remove this remnant using some acid chemical leaching processes, making use of hydrochloric acid, aqua regia, and piranha solution. Based on the experimental evidence, it was found that using aqua regia and combining the leaching process with mechanical milling was the most efficient way of removing such a remnant, the residue being only 0.9 wt.%. This value is low when compared to that obtained with the other acid leaching solutions and purifi-cation process (2.8 - 29.6 wt.%). A mandatory high-energy mechanical milling stage was neces-sary during this treatment, in order to expose and dissolve the highly insoluble oxide without secondary chemical reactions on the graphenes. High-energy mechanical milling is an effective route to exfoliate graphite/graphene, which allows the magnesium oxide to be more susceptible to acid treatment. The obtained surface area was 504 m2g-1; this high value resulting from the in-tense exfoliation can potentiate the use of this material for a wide variety of applications.
Tracking of Melanoma Cell Plasticity by Transcriptional Reporters
Authors: Vidal Anna , Redmer Torben
Published: January 2022

Clonal evolution and cellular plasticity are the genetic and non-genetic driving forces of tumor heterogeneity that in turn determines the tumor cell response towards therapeutic drugs. Several lines of evidence suggest that therapeutic interventions foster the selection of drug resistant neural crest stem-like cells (NCSCs) that establish minimal residual disease (MRD) in melanoma. Here we established a dual reporter system enabling the tracking of NGFR expression and mRNA stability, providing insights into the maintenance of NCSC-states. We observed that the transcriptional reporter that contained a 1kb fragment of the human NGFR promoter was activated only in a minor subset (0.72±0.49%, range 0.3-1.5) and ~2-4% of A375 melanoma cells revealed stable NGFR mRNA. The combination of both reporters provided insights into phenotype switching and revealed that both cellular subsets gave rise to cellular heterogeneity. Moreover, whole transcriptome profiling and gene set enrichment analysis (GSEA) of the minor cellular subset revealed hypoxia-associated programs that might serve as potential drivers of an in vitro switching of NGFR-associated phenotypes and relapse of post-BRAF inhibitor treated tumors. Concordantly, we observed that the minor cellular subset increased in response to dabrafenib over time. In summary, our reporter-based approach provided insights into plasticity and identified a cellular subset that might be responsible for the establishment of MRD in melanoma.
Public Perceptions of Legislative Action on Reducing Plastic Pollution: A Case Study of Atlantic Canada
Authors: Molloy Shen , Medeiros Andrew , Walker Tony , Saunders Sarah
Published: January 2022

Government-led legislation is a key strategy to reduce plastic pollution; however, societal perception can heavily influence government intervention for environmental issues. To understand the public acceptability of government action to reduce plastic pollution, we examine the perception of existing and upcoming legislative action on single-use plastics by means of a structured survey with additional semi-structured interviews. Our focus is on the four Atlantic provinces of Canada, which was the first region in Canada to implement provincial-wide legislation for plastic reduction at the consumer level in 2019. Results show strong public support (77 %, n = 838) for bans on single-use plastic bags at the consumer level, and for further plastic pollution reduction legislation. However, the level of support differed between regions and by demographics. Semi-structured interviews show that decision-makers should increase efforts in raising consumer awareness and standardizing regulations across jurisdictions for smoother transitions prior to legislative action.
Elastodynamic Behaviour of Laminate Structures with Soft Thin Interlayers: Theory and Experiment
Authors: Wilde Maria V. , Golub Mikhail V. , Eremin Artem A.
Published: January 2022

Laminate structures composed of stiff plates and thin soft interlayers are widely used in aerospace, automotive and civil engineering encouraging the development of reliable non-destructive strategies for their condition assessment. In the paper, elastodynamic behaviour of such laminate structures is investigated with emphasis on its application in ultrasonic based NDT and SHM for the identification of interlayer mechanical and interfacial contact properties. A particular attention is given to the practically important frequency range, in which the wavelength considerably exceeds the thickness of the film. Three layer model with spring-type boundary conditions employed for imperfect contact simulation is used for numerical investigation. Novel effective boundary conditions are derived via asymptotic expansion technique and used for analysis of the peculiar properties of elastic guided waves in considered laminates. It is revealed that the thin and soft film influences the behaviour of the laminate mainly via the effective stiffnesses being a combination of the elastic moduli of the film, its thickness and interface stiffnesses. To evaluate each of these parameters separately (or to figure out that the available experimental data are insufficient), a step-wise procedure employing the effective boundary conditions is proposed and tested versus the laser Doppler vibrometry data for Lamb waves in Aluminium/Polymer film/Alumunium structure. The possibility of using film-related thickness resonance frequencies to estimate the film properties and contact quality is also demonstrated. Additionally, the rich family of edge waves is also investigated, and the splitting of fundamental edge waves into pairs is revealed.
Pengembangan Media Pembelajaran Berbasis Sparkol Videoscribe pada Mata Pelajaran Bahasa Inggris
Authors: Ilmudinulloh Rafiud
Published: January 2022

Pembelajaran abad 21 mendorong guru untuk meningkatkan kompetensi teknologi. Penelitian ini bertujuan untuk mengembangkan media pembelajaran berbasis Sparkol Videoscribe yang layak digunakan pada mata pelajaran bahasa Inggris, oleh karenanya metode penelitian yang digunakan adalah Research and Development (RD). Model pengembangan dalam penelitian ini diadaptasi dari Sadiman yang meliputi tahapan – tahapan: 1) Identifikasi Kebutuhan, 2) Perumusan Tujuan, 3) Perumusan Butir-Butir Materi, 4) Perumusan Instrumen Penilaian, 5) Penulisan Naskah Media, 6) Uji Coba, 7) Revisi, dan 8) Siap Produksi. Jenis data terdiri dari data verbal, dan data numerik. Instrumen penelitian terdiri dari wawancara terbuka, observasi dan angket. Teknik analisis yang digunakan adalah deskriptif kualitatif dan statistik deskriptif. Hasil penelitian menunjukkan bahwa media pembelajaran berbasis Sparkol Videoscribe memenuhi kriteria kelayakan setelah menyelesaikan tahapan – tahapan pengembangan adaptasi Sadiman. Ahli materi dan media memberikan peniliaan dengan kualifikasi baik dan tidak perlu direvisi. Dan uji coba lapangan mendapat penilaian dengan kualifikasi sangat baik dan tidak perlu direvisi.
Perancangan e-Marketplace Maswira (Masyarakat Pesisir berwirausaha) pada Dinas Pertanian dan Perikanan Kab. Bombana
Authors: Ningsi Nurfitria , Sunyanti Sunyanti , Sarimuddin Sarimuddin
Published: January 2022

Objektif dari studi ini adalah untuk menghasilkan sebuah aplikasi e-Marketplace MASWIRA untuk membantu pihak Dinas Pertanian dan Perikanan Kabupaten Bombana dalam upaya memaksimalkan kesadaran masyarakat akan potensi perikanan didaerah pesisir Kabupaten Bombana Sulawesi Tenggara selain sebagai media promosi produk UMKM bidang Perikanan juga sebagai sarana komunikasi antara Pemda Kab. Bombana dengan masyarakat setempat. Mengingat selama pandemic Covid-19 perekonomian daerah Kab. Bombana ikut mengalami impas negatif khususnya menurunnya omset penjualan. Berkembangnya penggunaan layanan e-commerce yang awalnya hanyalah alternatif saja tapi kini menjadi pintu utama penghubung antara masyarakat dengan UMKM lokal, Perancangan menggunakan model waterfall yang bertujuan menjabarkan Proses pengembangan secara terstruktur sehingga efektif meminimalisir kesalahan dan biaya pengembangan ulang
Mangrove Vegetation Mapping Using Sentinel-2A Imagery Based on Google Earth Engine Cloud Computing Platform
Authors: Prayogo Luhur Moekti
Published: January 2022

Mangroves are trees whose habitat is affected by tides, and their presence has decreased from year to year. Today, mapping technology has undergone many developments, including the availability of images of various resolutions and cloud-based image processing. One of the popular platforms today is the Google Earth Engine. Google Earth Engine is a cloud-based platform that makes it easy to access high-performance computing resources for extensive processing. The advantage of using Google Earth Engine is that users do not have to be IT experts without experts in application development, WEB programming, and HTML. This study aims to conduct a study on mangrove mapping in Gili Genting District with Sentinel-2A imagery using a Google Earth Engine. This location was chosen since there are still many mangroves, especially on the Gili Raja and Gili Genting Islands. From this research, it can be concluded that cloud computing-based Sentinel-2A image processing shows that the vegetation value of NDVI results ranges from -0.923208 to 0.75579. The classification results show that mangrove forests' overall presence on Gili Genting Island is more expansive than Gili Raja Island with 16.74 ha and 14.75 ha. The use of the Google Earth Engine platform simplifies the analysis process because image processing can be done once with various scripts so that analysis becomes faster.