bluuebunny/crossref_metadata_2025 huggingface dataset:
Problemas computacionais para esquemas de criptografia de chave pública
Authors: Ribeiro Vinicius Gadis , Weber Raul Fernando
Published: September 2022

O presente trabalho apresenta um estudo comparativo dos problemas empregados para esquemas de criptografia de chave pública. Uma breve descrição dos problemas matemáticos – ou computacionais - nos quais se baseiam os esquemas de chave pública é relacionada, incluindo os problemas empregados por um novo esquema, chamado Rafaella. É apresentado, ao final, um quadro comparativo.
Votação Anônima Segura Utilizando Lista de Discussão
Authors: Dias Júlio S. , Pereira Fabiano C. , Custódio Ricardo F. , De Rolt Carlos R.
Published: September 2022

A democracia é um tema bastante discutido, sendo que a sua importância concentra-se na possibilidade de se debater um assunto em específico, indo além da simples escolha dentre as opções disponíveis. Neste artigo propõese um meio de se realizar debates e também votações entre os participantes de uma lista de discussão, que é um serviço disponibilizado utilizando a infraestrutura de correio eletrônico existente. Esta infra-estrutura é bastante utilizada e tem sido submetida a testes ao longo dos anos, provando sua confiabilidade. Propõe-se contudo, adicionar a possibilidade de anonimato e um mecanismo de coleta e processamento de dados, através do uso de técnicas criptográficas, para que as votações sejam feitas de forma segura.
Detecção de nós maliciosos em redes de sensores sem fio
Authors: Pires Júnior Waldir Ribeiro , Figueiredo Thiago H. de Paula , Wong Hao Chi , Loureiro Antonio A. F.
Published: September 2022

Este trabalho apresenta uma solução para identificar nós maliciosos em redes de sensores sem fio via detecção de transmissões de mensagens maliciosas em uma rede. Uma transmissão de mensagem é considerada suspeita se sua potência de sinal é incompatível com a posição geográfica de seu originador. São providos protocolos para detectar transmissões maliciosas – e a consequente identificação de nodos maliciosos – e para disseminar esta informação na rede. A taxa de detecção e a eficiência de nossa solução são avaliadas levando-se em conta múltiplos parâmetros.
Sistema para Autenticação de Usuários por Voz em Redes de Computadores
Authors: Petry Adriano , Soares Sidcley da Silva , Barone Dante Augusto Couto
Published: September 2022

Este trabalho apresenta um sistema para autenticação de usuários por voz em redes de computadores. Inicialmente é dada uma visão geral do sistema, focando na arquitetura cliente/servidor utilizada. A seguir, são mostradas as principais características dos blocos constituintes, abrangendo as técnicas para reconhecimento de locutor, características da base de dados, comunicação cliente/servidor e aplicação responsável pelo gerenciamento e interface com o usuário. Por fim são discutidas as dificuldades encontradas e são apontados trabalhos futuros.
Uma Arquitetura para Rastreamento de Pacotes na Internet
Authors: Hilgenstieler Egon , Duarte Jr. Elias P.
Published: September 2022

Após identificado um ataque a uma rede conectada, é importante que seja possível identificar a real origem do atacante. Entretanto, a arquitetura da Internet não permite que a origem de um pacote IP seja descoberta de maneira confiável. Este trabalho apresente uma arquitetura que mantém logs do tráfego da rede utilizando uma estrutura de armazenamento eficiente chamada Bloom Filter. Através de técnicas de extração apropriadas, é possível identificar a origem de um pacote utilizado no ataque. Além disto, ao contrário de arquiteturas já propostas, é determinado todo o caminho percorrido pelo pacote rastreado, sendo necessário menores quantidades de armazenamento. É admitido uma pequena taxa de falsos positivos que pode ser configurada.
Uma proposta para automatização da administração de redes IPSec juntamente com PKIs, utilizando uma API própria
Authors: Piva Eduardo Fernandes , Geus Paulo Lício de
Published: September 2022

Uma das dificuldades em se integrar uma PKI a um framework é a dificuldade em se encontrar APIs criprográficas que facilitem integração das aplicações deste framework a uma PKI, utilizando protocolos bem definidos. Este artigo descreve como diminuir as tarefas administrativas de uma infraestrutura de chaves públicas, removendo a necessidade de se administrar manualmente a renovação e revogação de certificados para ambientes com IPSec, utilizando a API desenvolvida neste projeto, com o objetivo de facilitar a integração e desemolver soluções com PKIs, utilizando as especificações da IETF PKIX Workgroup.
Transferência de autenticação e autorização através de Serviços Web
Authors: Mello Emerson Ribeiro de , Fraga Joni da Silva , Camargo Edson Tavares de
Published: September 2022

Neste trabalho é apresentado um modelo que visa permitir a transferência de autenticação e autorização entre diferentes domínios administrativos e de segurança. O modelo faz uso das especificações de segurança propostas para a arquitetura dos Serviços Web e está fundamentado no conceito das teias de federações que permite soluções de gerenciamento de direitos escaláveis e flexíveis. No trabalho é apresentado um exemplo, que ilustra a integração de diferentes tecnologias de segurança, no caso, o SPKI/SDSI e o X.509.
A Privacy Preservation Masking Method to Support Business Collaboration
Authors: Oliveira Stanley R. M.
Published: September 2022

This paper introduces a privacy preservation masking method to support business collaboration, called Dimensionality Reduction-Based Transformation (DRBT). This method relies on the intuition behind random projection to mask the underlying attribute values subject to cluster analysis. Using DRBT, data owners are able to find a solution that meets privacy requirements and guarantees valid clustering results. DRBT was validated taking into account five real datasets. The major features of this method are: a) it is independent of distance-based clustering algorithms; b) it has a sound mathematical foundation; and c) it does not require CPU-intensive operations.
JaCoWeb-ABC: Integração do Modelo de Controle de Acesso UCONABC no CORBASec
Authors: Higashiyama Marcelo Shinji , Lung Lau Cheuk , Obelheiro Rafael R. M. , Fraga Joni da S.
Published: September 2022

A arquitetura JaCoWeb-ABC é uma extensão da especificação CORBASec que aplica o modelo de controle de acesso UCONABC à sua camada de segurança. O JaCoWeb-ABC define um controle de acesso configurável, que trabalha com políticas de autorização, obrigação e condição definidas pelo administrador do sistema. Estas políticas de segurança podem ser definidas de duas formas, a primeira totalmente transparente para a aplicação e a segunda que possibilita trabalhar em conjunto com a aplicação. A combinação dessas duas funcionalidades irá definir um modelo de controle de acesso muito mais preciso e rigoroso sobre as ações dos usuários em um sistema.
Taxonomias de Vulnerabilidades: Situação Atual
Authors: Grégio André Ricardo Abed , Barbato Luiz Gustavo C. , Duarte Luiz Otávio , Montes Antonio , Hoepers Cristine , Steding-Jessen Klaus
Published: September 2022

É grande o número de vulnerabilidades em softwares que têm sido descobertas a cada ano, porém não existe nenhum tipo de classificação ou padronização das informações que devem ser mantidas a respeito dessas vulnerabilidades. Este artigo apresenta uma revisão dos trabalhos nas áreas de taxonomias e classificações de vulnerabilidades, discutindo desde as primeiras propostas até os trabalhos mais atuais.
Um gerador de bits pseudo-aleatórios seguro baseado em curvas elípticas
Authors: Neto Afonso Comba de Araujo , Weber Raul Fernando
Published: September 2022

Este artigo apresenta a proposta de um gerador de bits pseudo-aleatórios criptograficamente seguros com uma arquitetura híbrida que utiliza exponenciação em módulo e produto escalar em um par de curvas elípticas. Sua segurança é apresentada em termos teóricos. Esta proposta faz parte de uma pesquisa sobre a viabilidade de um cifrador de fluxo baseado em curvas elípticas.
Watermarking Techniques for Multimedia Authentication
Authors: Borges Paulo Vinicius Koerich , Pizzio Robinson , Mayer Joceli
Published: September 2022

Recently we have witnessed great interest in watermarking technologies. Watermarking can be seen as a solution to overcome many security and authentication problems. Several watermarking methods have been proposed in the literature. In this paper, we review some of these techniques and their applications, properties, advantages and shortcomings. Moreover, we indicate that watermarking technology needs to be joined to classical security methods in order to solve challenging problems in multimedia authentication and other applications.
Model-Based Management of Network Resources
Authors: Figueira Filho Fernando Marques , Albuquerque João Porto de , Geus Paulo Lício de
Published: September 2022

The modelling of access control rules in terms of high-level policies has been subject of research over the last decade. Policies, in this context, define if an access is permitted or forbidden to be performed. However, they do not prescribe rules for the utilization of network resources. In this manner, a user or application might consume available resources with superfluous activities, hindering other high-priority users or applications to work properly. Following this motivation, our approach associate to a policy a set of requirements that must be fulfilled for each access. We adopt model-based management concepts, in which a policy is defined in terms of abstract entities and is represented at different levels of abstraction.
Repositório Seguro de Aplicações Baseado em GSS
Authors: Pinheiro Júnior Jose de R. B. , Vidal Alexandre César Tavares , Kon Fabio
Published: September 2022

Segurança é um conceito chave em sistemas distribuídos. Em sistemas de Grades Computacionais Oportunistas, recursos, aplicações, e dados dos usuários devem ter garantias de segurança. Esse artigo descreve a implementação do repositório seguro de aplicações do InteGrade. São apresentados problemas de segurança em Grades de computadores e como eles são abordados no InteGrade. Segue-se uma descrição da arquitetura do InteGrade e a implementação dos protocolos de segurança no repositório de aplicações. São mostrados, por fim, resultados experimentais relacionados ao desempenho da implementação proposta, trabalhos em andamento e idéias para trabalhos futuros.
Composição de IDSs Usando Web Services
Authors: Brandão José Eduardo M. S. , Fraga Joni da Silva , Mafra Paulo Manoel
Published: September 2022

Este artigo apresenta um modelo para a composição, mesmo dinâmica, de sistemas de detecção de intrusão que funcionem tanto em ambientes fechados de médias e grandes empresas, quanto em ambientes abertos, que fazem uso da Internet. A construção de tais sistemas é possível através da aplicação de padrões introduzidos (ou em processo de definição) e ainda, pelo emprego extensivo da linguagem XML e da tecnologia de Web Services.
Uma Abordagem para Detecção de Ataques Distribuídos e de Múltiplas Etapas baseada na Composição de Serviços Web voltados à Segurança
Authors: Fagundes Leonardo Lemes , Gaspary Luciano Paschoal
Published: September 2022

Este artigo apresenta uma arquitetura baseada em web services para detecção de ataques distribuídos e de múltiplas etapas. A arquitetura oferece um mecanismo uniforme de comunicação com diferentes serviços de segurança e possibilita a correlação de eventos gerados pelos mesmos, bem como a execução de ações de contramedidas.
Uma Metodologia para Verificação de Filtros de Pacotes
Authors: Fávero André Luís , Weber Raul Fernando
Published: September 2022

Este artigo descreve uma proposta de metodologia para verificação de incoerências em regras de filtros de pacotes. Para tanto, as regras são comparados duas a duas, procurando-se por erros, redundâncias totais ou parciais ou por situações que devem ser analisadas (avisos). A metodologia pode ser utilizada tanto em um único filtro como em filtros hierarquicamente distribuídos. O aspecto do filtro operar com ou sem informação de estado também é considerado.
Horizontal Integration
Authors: Beck Joachim
Published: September 2022

The European border regions perform a specific horizontal integration function. From the perspective of public administration theory, this publication lays the foundations for conceptualising the policy area of cross-border cooperation in Europe as a horizontal level of integration. To this end, the volume analyses the integration theory specifics of its genesis, the functional particularities of its governance with regard to the decentralised integration of different political–administrative, legal and cultural systems, as well as the patterns of emergent, transnational territorial institutionalism. Finally, administrative perspectives on the study of cross-border cooperation as a horizontal level of the European Administrative Area are also presented.
Nationale Gerichte im Klimaschutzvölkerrecht
Authors: Saiger Anna-Julia
Published: September 2022

Climate change litigation challenges our understanding of the role of domestic courts in international law. This book compares four climate change cases and examines the role of domestic courts under the 2015 Paris Agreement. Domestic courts take a hinge function in the bottom up approach of the international climate change regime: They link domestic climate change provisions to the Paris Agreement’s long-term temperature goal. As courts are embedded into diverse legal and extra legal contexts on the national level, they do not always decide in favour of climate protection measures. However, a comparative view of climate change litigation reveals that domestic courts put international and national law into a procedural relationship.
Der Portalverbund zwischen Bund und Ländern
Authors: Starosta Gina
Published: September 2022

The Portalverbund is an indicator of e-government. The focus of the discourse is on determining the scope of article 91c V GG. It explores the limits of the competence title; warns against excessive legislative use. The term Verwaltungsleistungen is examined; the question is explored to what extent this will move away from the traditional term of Verwaltungsverfahren. The work demonstrates foresight, as developments closely related to the OZG, such as those of the RegModG with the data protection cockpit, are considered. Due to the defined limits of competence and in view of the dynamics of the legal field, the statements of the document are of interest for the administration, science and also for the legislator and the judiciary.
Continuous Training and Crocin Supplementation Alleviates Doxorubicin-Induced Hepatocyte Apoptosis in Male Rats
Authors: Hamidian Babak , Nikbakht Masoud , Fathi Moghaddam Hadi , Zilaei Bouri Shirin
Published: September 2022

Background: Chemotherapy drugs can cause liver damage by causing hepatotoxicity. Objectives: This study aimed to determine the interactive effect of continuous training and Crocin supplementation on hepatocyte apoptosis in male rats induced by doxorubicin. Methods: In this experimental study, 40 Wistar rats were randomly assigned to: (1) healthy, (2) doxorubicin (Dox), (3) Dox + crocin (Cr), (4) Dox + continuous training (CT), and (5) Dox + CT + Cr. Group 1 received normal saline daily; groups 2 to 5 received (7 × 2 mg/kg) Dox intraperitoneal; groups 3 and 5 received 10 mg/kg crocin orally on a daily basis, and groups 4 and 5 were trained 5 days/week (60 - 70 of maximum speed) for 8 weeks. Results: The Dox group had the highest mean percentage of apoptotic hepatocytes (64.33 ± 6.02) compared to other groups (P < 0.05). In contrast, tissue apoptosis was significantly reduced (P < 0.05) in all intervention groups: Dox + CT (30.67 ± 4.04%), Dox + Cr (18 ± 2.64%), and Dox + CT + Cr (13.67 ± 1.52%); however, the improvement was greater in the group receiving crocin. Conclusions: Continuous training, Cr, and their combination significantly reduced hepatocyte apoptosis in male rats exposed to Dox-induced toxicity. However, a greater reduction in liver tissue apoptosis was recorded for the Crocin-treated groups.
Mystical Solidarities: Ali Shariati and the Act of Translation
Authors: Davari Arash , Saffari Siavash ,   Philosophy Documentation Center
Published: September 2022

This introduction frames the special issue titled “Mystical Solidarities: Ali Shariati and the Act of Translation.” Drawing from insights across the collection’s essays, it foregrounds a notion of translation as a transformative act, anchored in Shariati’s mystical ontology, that fosters and sustains anticolonial solidarities. To illustrate, we explore differences and affinities between Shariati and Frantz Fanon with regard to truth-telling, translation, alienation, and subjectivity. The comparison reveals a generative distinction in Shariati’s thought between cultural and existential alienation, “translated intellectuals” and the act of translation. The distinction creates grounds for a vision of anticolonial solidarity responsive to circumstances in postrevolutionary Iran, a vision that reaches beyond the postcolonial state
Factors associated with the use of nonprescription psychotropic drugs in Chile: A descriptive study using a nationwide drug consumption survey
Authors: Droguett Nataly , Vidal Carolina , Medina Bárbara , Hoffmeister Lorena
Published: September 2022

Background The consumption of psychotropic drugs without a medical prescription is a growing public health problem worldwide. Misuse or indiscriminate use involves several risks. Objective To determine sociodemographic factors and behaviors associated with the consumption of psychotropic drugs without prescription in Chile. Methods This is a descriptive study based on the data of the XI National Study of Drugs in the General Population in Chile, carried out in the population between 12 and 64 years old (n = 19 512) during 2014. Prevalence was estimated, and a multivariate logistic regression model was adjusted. Also, a multiple correspondence analysis was performed. Results The prevalence of psychotropic drug use was 2.3%. In the studied population, associated risk factors are female sex (odds ratio: 1.4; 95% confidence interval: 1.16 to 1.77); ages between 20-29 (odds ratio: 1.4; 95% confidence interval: 0.98 to 2.26) and 40-49 (odds ratio: 1.8; 95% confidence interval: 1.19 to 2.75); consumption of marijuana (odds ratio: 3.0; 95% confidence interval: 3.32 to 3.97), cocaine or crack (odds ratio: 3.7; 95% confidence interval: 2.45 to 5.70); tobacco (odds ratio: 1.4; 95% confidence interval: 1.17 to 1.78); alcohol (odds ratio: 1.3; 95% confidence interval: 1.11 to 1.73); and poor health perception (odds ratio: 1.8; 95% confidence interval: 1.51 to 2.28). Military personnel used more pain and cough medication; young women between 19 to 25 years old used stimulants; the population between 45 to 64 years had a bad perception of health associated with the use of tranquilizers; and men between 12 and 18 years used illicit drugs. Conclusions The prevalence found in the different groups is consistent with data reported in Latin America, showing the relationship between the use of non-prescription psychotropic drugs with sociodemographic factors, risk behaviors, and the identification of consumption profiles.
Development and psychometric evaluation of Clinical Practice Self-Efficacy Scale for nursing students
Authors: Choi Heejung , Kim Sueun , Jeong Harim
Published: September 2022

Purpose: The COVID-19 pandemic has increased the importance of nurses' clinical performance, and accordingly, nursing educators have emphasized students' clinical practice and performance. This study developed a Clinical Practice Self-Efficacy Scale for nursing students and examined its psychometric properties.Methods: The authors reviewed instruments for selecting items for the scale in the areas of clinical skills, communication, infection control, safety, and nursing process. After preliminary items were selected, ten experts consisting of nursing professors and clinical nurses reviewed the items considering Korean clinical and educational situations. The data for the psychometric evaluation was collected from 257 nursing students in their 2nd, 3rd, and 4th years and then analyzed.Results: The confirmatory factor analysis showed that the goodness of fit of this scale with five factors represented by 40 items was appropriate. The significant positive correlations with general self-efficacy indicated sound construct validity. The senior nursing students showed higher scores than others, as we expected. Cronbach’s alpha was .94.Conclusion: The Clinical Practice Self-Efficacy Scale is appropriate for measuring Korean nursing students' self-efficacy of clinical practice. It is expected to act as a good tool to measure the effects of clinical practice education.
Factors affecting nursing students' patient safety competencies
Authors: Min Deulle , Kwak Eunju , Park Seungmi
Published: September 2022

Purpose: The purpose of this study is to identify nursing students' level of critical thinking disposition, communication skills, and self-leadership and to identify factors that affect the patient safety competency of nursing students.Methods: This study employs a descriptive research, method and was conducted from April 20 to May 19, 2022, with students from three nursing colleges in Korea. The collected data were analyzed by frequency and percentage, independent t-test, Pearson's correlation coefficients, and multiple regression. All analyzes were conducted using IBM SPSS 22.0.Results: The results of the multiple regression analysis showed that the regression model was significant (F=17.30, p<.001) and that communication skills (β=.22, p=.001), self-leadership (β=.31, p<.001), patient safety education experience (β=.15, p=.009), and subjects for credit (β=.15, p=.006) explained 28.0% of nursing students' patient safety competency.Conclusion: It is necessary to develop a self-leadership and communication skills improvement program and to organize rgular courses safety education subjects to improve the patient safety competency of nursing students.
Nursing students' knowledge, health beliefs, anxiety, and preventive health behaviors on COVID-19: A cross-sectional study
Authors: Sa Hyeweon , Kim Youngj
Published: September 2022

Purpose: This study aimed to describe Coronavirus disease 2019 (COVID-19)-related knowledge, health beliefs, anxiety levels, and preventive behaviors among nursing students and to identify factors that influence their preventive behaviors.Methods: A descriptive survey was conducted, targeting a total of 192 nursing students from March 4, 2021 to March 25, 2021. A structured questionnaire was used to identify nursing students' knowledge, health beliefs, anxiety, and preventive health behavior regarding COVID-19. Data were analyzed using descriptive statistics, a t-test, analysis of variance, Pearson’s correlation coefficients, and multiple regression.Results: The nursing students’ knowledge level was 15.08±1.70 out of 5, and their health belief level was 3.72±0.32 out of 5. These scores were considered high. Their anxiety score was 3.29±3.84 and considered very low. COVID-19 preventive behaviors had a positive correlation with benefits (r=.29, p<.001) and cues to action (r=.28, p<.001). Factors influencing COVID-19 preventive behaviors by multiple regression were identified as health beliefs and living arrangements (F=8.95, p<.001, Adjusted R2=14.3%).Conclusion: The findings suggest that health beliefs and living arrangements could be important factors affecting preventive health behavior in nursing college students during the COVID-19 pandemic. This study highlights the need for appropriate education and widespread awareness campaigns aimed at potential health care professionals about the prevention of new emerging diseases.
Comparison of the effects of two oral cares on thirst and oral status following nasal surgery: Oral swab versus non-swab using cold water gauze
Authors: Gu Anna , Yu Mi , Kim Youngjin , Park Suyeon , Baek Kyunghee , Kim Taehee
Published: September 2022

Purpose: This study aimed to compare the effects of oral swab and non-swab using cold water gauze on patients’ thirst and oral status following nasal surgery under general anesthesia.Methods: A non-equivalent control group was applied. Participants were divided into a control group (n=30) that was treated by cared for with cold water gauze application without oral swab and an experimental group (n=29) that was treated cared for with oral swab using cold water gauze after nasal surgery at the G University Hospital in Korea. Data were collected from May 14, 2020, to April 30, 2021, and analyzed using descriptive statistics, a chi-squared test, independent t-test, Wilcoxon signed-ranks test, and Mann-Whitney test.Results: The results showed no significant differences between the two groups in thirst (U=-0.04, p=.693) and overall oral condition (U=-0.34, p=.813) after the intervention. However, participants’ thirst and oral condition were significantly improved in each group after intervention.Conclusions: It was confirmed that both oral care methods reduced thirst and improved oral condition after nasal surgery. These findings indicate the need for intervention for patients’ thirst and oral condition after nasal surgery. Furthermore, they show that these oral care protocols can be used as a safe and effective nursing intervention for patients who undergo nasal surgery under general anesthesia.
Predictors of anxiety and depression in Korean adults during COVID-19 pandemic
Authors: Sohn Jung Nam
Published: September 2022

Purpose: This study was conducted to identify the mental health status of Korean adults during the COVID-19 pandemic and to verify the predictors and mediating effects of avoidance coping on the relationship between the intolerance of uncertainty and anxiety and the intolerance of uncertainty and depression.Methods: An online survey was completed by 191 Korean adults from 19 to 64 years old. Using the IBM SPSS Win 19.0 program, the data were analyzed through the frequency, mean, t-test or analysis of variance, Pearson’s correlation coefficient, linear regression analysis and Sobel test.Results: Of the survey respondents 21.5%, and 33.5% respectively were classified into anxiety and depression risk groups. The predictors of anxiety were intolerance of uncertainty (β=.52), avoidance coping (β=.21), and response efficacy (β=-.15). Those variables explained 47.7% of the respondents’ anxiety. The predictors of depression were intolerance of uncertainty (β=.40), avoidance coping (β=.20), and response-efficacy (β=-.12). These variables explained 34.9% of the participants’ depression. Among the predictors of anxiety and depression, avoidance coping was the significant mediating variable.Conclusion: The predictors of anxiety and depression during the COVID-19 pandemic were revealed to be intolerance of uncertainty, avoidance coping, and response-efficacy. These results indicate the necessity of providing the cognitive interventions and reducing the use of avoidance coping strategies on a personal level. Community-level efforts, including early detection and health communication strategies, should prioritize risk groups for example young adults. The study suggests it will be necessary to provide sufficient information, psychological support and economic policy alternatives related to the COVID-19 pandemic on the national level.
Chronic neurotransmission increases the susceptibility of lateral-line hair cells to ototoxic insults
Authors: Lukasz Daria , Beirl Alisha , Kindt Katie
Published: September 2022

Sensory hair cells receive near constant stimulation by omnipresent auditory and vestibular stimuli. To detect and encode these stimuli, hair cells require steady ATP production, which can be accompanied by a buildup of mitochondrial byproducts called reactive oxygen species (ROS). ROS buildup is thought to sensitize hair cells to ototoxic insults, including the antibiotic neomycin. Work in neurons has shown that neurotransmission is a major driver of ATP production and ROS buildup. Therefore, we tested whether neurotransmission is a significant contributor to ROS buildup in hair cells. Using genetics and pharmacology, we disrupted two key aspects of neurotransmission in zebrafish hair cells: presynaptic calcium influx and the fusion of synaptic vesicles. We find that chronic block of neurotransmission enhances hair-cell survival when challenged with the ototoxin neomycin. This reduction in ototoxin susceptibility is accompanied by reduced mitochondrial activity, likely due to a reduced ATP demand. In addition, we show that mitochondrial oxidation and ROS buildup are reduced when neurotransmission is blocked. Mechanistically, we find that it is the synaptic vesicle cycle rather than presynaptic- or mitochondrial-calcium influx that contributes most significantly to this metabolic stress. Our results comprehensively indicate that, over time, neurotransmission causes ROS buildup that increases the susceptibility of hair cells to ototoxins.
Relationship of Symptom Clusters, Compliance with the Patient’s Role Behavior, and Dialysis Adequacy with Quality of Life in Hemodialysis Patients
Authors: Moon Semi , Cha Chiyoung
Published: September 2022

Purpose: The purpose of this study was to identify the relationships of symptom clusters, compliance with the patient’s role behavior, and dialysis adequacy with quality of life among hemodialysis patients. Methods: Structured surveys were used to collect data from 132 patients who were receiving hemodialysis as outpatients at two hemodialysis units using the Dialysis Symptom Index, tools to assess compliance with the patient’s role behavior and dialysis adequacy, and the Korean version of the World Health Organization BREF index for quality of life. Results: Quality of life was negatively correlated with the emotional-gastrointestinal symptom cluster (r=-.20, p=.021), the disturbance related-worrying symptom cluster (r=-.40, p<.001), and the sexual symptom cluster (r=-.23, p=.007), and positively correlated with compliance with the patient’s sick role (r=.43, p<.001). Conclusion: Nursing interventions for hemodialysis patients targeting each symptom cluster are expected to improve their quality of life, as well as applying educational programs and nursing interventions to strengthen patient role performance.
Caring Behaviors and Anxiety during Surgery among Patients Undergoing Surgery with Regional Anesthesia
Authors: Ryoo Ji Young , Kim Hye Young
Published: September 2022

Purpose: This descriptive study aimed to identify the factors influencing caring behaviors and anxiety during surgery recognized by patients undergoing surgery with regional anesthesia. Methods: The subjects were 147 hospitalized patients who underwent surgery with regional anesthesia from July to September 2017. Data were collected through structured questionnaires and medical records at three orthopedics and women’s hospitals and one university hospital located in city A. The collected data were analyzed for frequency and percentage, mean and standard deviation, the independent t-test, one-way analysis of variance, correlation analysis, and stepwise multiple regression using the SPSS 27.0 program. Results: The factors influencing anxiety during surgery were caring behaviors (β=-.39, p<.001), surgical site (β=.27, p<.001), and trait anxiety (β=.21, p=.007), in descending order of influence, and the explanatory power was approximately 21%. Conclusion: Health care staff’s caring behaviors were the factor with the strongest influence on anxiety during surgery in patients undergoing surgery with regional anesthesia. Therefore, in order to alleviate anxiety during surgery, it is necessary to study the effect of developing and applying an intervention program for caring behaviors.
Factors Influencing Life Satisfaction in Middle-Aged Women
Authors: Kim Hee Kyung , Chang Hae Kyung
Published: September 2022

Purpose: The purpose of this study was to analyze the influences of aging anxiety, coping, ego-resilience, meaning of life, and generativity on life satisfaction among middle-aged women. Methods: Data were collected from 176 middle-aged women aged 40~64 living in four urban areas in South Korea through an online survey. The collected data were analyzed using descriptive statistics, the independent t-test, one-way analysis of variance, Pearson correlation coefficients, and stepwise multiple regression using SPSS version 26.0 for Windows. Results: Life satisfaction showed significant positive correlations with social support seeking as a coping strategy (r=.27, p<.001), ego-resilience (r=.33, p<.001), meaning of life (r=.46, p<.001), and generativity (r=57, p<.001), and negative correlations with aging anxiety (r=-.43, p<.001) and avoidance-centered coping (r=-.25, p<.001). The factors affecting participants’ life satisfaction were perceived economic status (≥medium) (β=.33, p<.001), generativity (β=.28, p<.001), aging anxiety (β=-.27, p<.001), meaning of life (β=.18, p=.009), and social support seeking (β=.12, p=.023). The explanatory power of these five variables was approximately 53%. Conclusion: To increase life satisfaction among middle-aged women, it is necessary to establish generativity, reduce aging anxiety, and foster a positive meaning of life by choosing a desirable coping method. Providing information on utilizing economic resources is also required.
Digital Youth's Self-talk and Pep-talk: Mood Regulation via Mobile Media and Emotional Well-being
Authors: An Soontae , Lee Hannah
Published: September 2022

Purpose: The purpose of this study was to investigate the relationship between an individual's daily well-being and the self-talk and pep-talk type. Methods: A total of 378 Koreans between the ages of 18 and 37 participated in an online survey. The participants were presented with four vignettes and then responded to the question, “If you were feeling the same way as presented in the vignette, what type of self-talk and pep-talk would you be likely to have?” Descriptive and frequency analysis was used to examine the participants’ demographic characteristics and their preferred types of self-talk and pep-talk according to mood state. Moreover, hierarchical regression analysis was used to examine the relationships among the study variables. Results: The message types of self-talk and pep-talk changed according to the participant’s mood state (i.e., anger, sadness, anxiety, and self-harm). In addition, people with higher levels of daily well-being were more likely to engage in active self-talk to regulate their mood. Conclusion: This study implies that self-talk and pep-talk via mobile media can serve as effective regulation strategies for people’s daily negative moods.
Development of the Korean Health Behavior for Dementia Prevention Scale for Older Adults
Authors: Kim Hyukjoon , Oh Moonjoo , Kwon Hyangsuk , Jeong Seohee , Cho Hyangsoon , Kim Hye Young
Published: September 2022

Purpose: This study aimed to develop the Korean Health Behavior for Dementia Prevention Scale (K-HBDP) and test its validity and reliability. Methods: In this methodological study, the K-HBDP scale was administered to 216 community-dwelling older adults (aged 65 or older) in 2020 in seven cities of western Korea using convenience sampling. Item analysis, construct validity, item convergent and discriminant validity, criterion validity, and internal consistency reliability were evaluated using SPSS for Windows 27.0. Results: The scale includes 23 items and five subscales: cognitive social activities, healthcare management, lifestyle, smoking and drinking, and eating habits, and the cumulative variance explained by the factors was 66.8%. Cronbach’s ⍺ for internal consistency of the total scale was .90 and ranged from .65 to .89 for all subscales. Item convergent and discriminant validity of the K-HBDP were confirmed. Criterion validity was demonstrated with the Health Promoting Lifestyle Profile-II. Conclusion: The findings suggest that K-HBDP scale can be used to measure healthy activities to prevent dementia in older adults. The use of this tool is expected to help develop interventions, educational materials, and training programs to improve nursing practice.
Nuclearity for partial crossed products by exact discrete groups
Authors:   Departamento de Matematica, Universidade Federal de Santa Catarina, Florianopolis, 88040-900, Brazil, Buss Alcides , Ferraro Damian ,   Departamento de Matematica y Estadistica del Litoral, Universidad de la Republica, Salto, 50000, Uruguay, Sehnem Camila F. ,   School of Mathematics and Statistics, Victoria University of Wellington, P.O. Box 600, Wellington, 6140, New Zealand
Published: September 2022

We show that the partial crossed product of a commutative C∗-algebra by an exact discrete group is nuclear if the full and reduced partial crossed products coincide. This generalises a result by Matsumura for global actions. In general, we prove that a partial action of an exact discrete group on a C∗-algebra A has Exel's approximation property if and only if the full and reduced crossed products by the diagonal partial action on A⊗maxAop coincide. We apply our results to show that the weak containment property implies nuclearity in the case of semigroup C∗-algebras and C∗-algebras of separated graphs.
Nuclear dimension of extensions of O∞-stable algebras
Authors:   Mathematical Institute, University of Muenster, Einsteinstrasse 62, 48149 Muenster, Germany, Evington Samuel
Published: September 2022

We obtain an improved upper bound for the nuclear dimension of extensions of O∞-stable C∗-algebras. In particular, we prove that the nuclear dimension of a full extension of an O∞-stable C∗-algebra by a stable AF algebra is one.
Compact perturbations of scalar type spectral operators
Authors:   Fachrichtung 6.1 - Mathematik, Universitaet des Saarlandes, 66041 Saarbruecken, Germany, Albrecht Ernst , Chevreau Bernard ,   Institut de Mathematiques de Bordeaux, Universite de Bordeaux, 351, cours de la Liberation, F 33 405 Talence Cedex, France
Published: September 2022

We consider compact perturbations S=DΛ+K of normal diagonal operators DΛ by certain compact operators. Sufficient conditions for K to ensure the existence of non-trivial hyperinvariant subspaces for S have recently been obtained by Foia\c{s} et al. in C.\ Foia\c{s}, I.B.\ Jung, E.\ Ko, C. Pearcy, \textit{J.\ Funct. Anal.} \textbf{253}(2007), 628--646, C.\ Foia\c{s}, I.B.\ Jung, E.\ Ko, C.~Pearcy, \textit{Indiana Univ.\ Math.\ J.} \textbf{57}(2008), 2745--2760, {C.\ Foia\c{s}, I.B.\ Jung, E.\ Ko, C.Pearcy}, \textit{J.\ Math.\ Anal.\ Appl.} \textbf{375}(2011), 602--609 (followed by Fang--Xia \textit{J.\ Funct. Anal} \textbf{263}(2012), 135-1377, and Klaja \textit{J.\ Operator Theory} \textbf{73}(2015), 127--142, by using certain spectral integrals along straight lines through the spectrum of S. In this note, the authors use circular cuts and get positive results under less restrictive local conditions for K.
Maximal Haagerup subalgebras in L(Z2⋊SL2(Z))
Authors:   School of Mathematical Sciences, Dalian University of Technology, Dalian, 116024, China, Jiang Yongle
Published: September 2022

We prove that L(SL2(k)) is a maximal Haagerup--von Neumann subalgebra in L(k2⋊SL2(k)) for k=Q and k=Z. The key step for the proof is a complete description of all intermediate von Neumann subalgebras between L(SL2(k)) and L∞(Y)⋊SL2(k), where SL2(k)↷Y denotes the quotient of the algebraic action SL2(k)↷ˆk2 by modding out the relation ϕ∼ϕ′, where ϕ, ϕ′∈ˆk2 and ϕ′(x,y):=ϕ(−x,−y) for all (x,y)∈k2. As a by-product, we show L(PSL2(Q)) is a maximal von Neumann subalgebra in L∞(Y)⋊PSL2(Q); in particular, PSL2(Q)↷Y is a prime action.
Compact linear combinations of composition operators over the unit ball
Authors:   School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China, Guo Xin , Wang Maofa ,   School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China
Published: September 2022

In this paper, we study the compactness of any finite linear combination of composition operators with general symbols on weighted Bergman spaces over the unit ball in terms of a power type criterion. The strategy of the proof involves the subtle connection of composition operator theory between weighted Bergman spaces and Korenblum spaces.
Modular properties of type I locally compact quantum groups
Authors:   Institute of Mathematics, Polish Academy of Sciences, Warsaw, 00-656, Poland, Krajczok Jacek
Published: September 2022

The following paper is devoted to the study of type I locally compact quantum groups. We show how various operators related to the modular theory of the Haar integrals on G and ˆG act on the level of direct integrals. Using these results we derive a web of implications between properties such as unimodularity or traciality of the Haar integrals. We also study in detail two examples: discrete quantum group ˆSUq(2) and the quantum az+b group.
The Influence of Profitability and Liquidity on Firm Value (Case Study on a Non-financial Company Indexed ESG Quality 45 IDX-Kehati on the Indonesia Stock Exchange 2017-2020)
Authors: Akbar Zaki Faturahman , Nusa Inta Budi Setya , Iriyadi .
Published: September 2022

Aims: This study aims to determine the influence of Profitability and Liquidity on Firm Value, as previous research results were inconclusive, inconsistent, and sometimes contradictory.

Study Design: This research is quantitative correlational research using multiple linear regression.

Methodology: This study uses 35 non-financial companies indexed ESG Quality 45 IDX-Kehati listed on the Indonesia Stock Exchange for 2017-2020. The cross-sectional data are analyzed by SPSS version 25.

Results: This study provides empirical evidence that profitability (ROA) positively and significantly impacts firm value (PBV). As the coefficient value of ROA is +0.115, it means that every a hundred percent increase in Profitability (ROA) will increase the stock price or Firm Value (PBV) by 11.5%. Unexpectedly, the Liquidity (CR) does not affect firm value.

Conclusions: Return on assets as a proxy for profitability ratios has a positive and significant effect on increasing stock market prices to the book value ratio as a proxy for firm value. In contrast, the liquidity ratio does not affect the increase in stock prices. These findings indicate that investors and capital market analysts are more concerned with profitability than liquidity. Therefore, managers and directors must generate maximum net profit by increasing the productivity of all company assets. The limitation of this study is that the sample is small and only uses two predictor variables, so the coefficient of determination (R2) is 28%. For further research, adding other predictor variables and control variables is recommended.
Nb/Al co‐doped Li7La3Zr2O12 Composite Solid Electrolyte for High‐Performance All‐Solid‐State Batteries
Authors: Nguyen Hoang Long , Luu Van Tung , Nguyen Manh Cuong , Kim Sung Hoon , Nguyen Quoc Hung , Nungu Nungu Israel , Jun Yun‐Seok , Ahn Wook
Published: September 2022

All‐solid‐state Li batteries (ASSLBs) are considered suitable candidates to replace conventional batteries utilizing liquid electrolytes. However, the applications of this type of batteries are limited owing to their narrow operating temperature range, low ionic conductivity, poor long‐term stability, and complex production process. Herein, a simple approach that combines all potential battery candidates that have been investigated over the last few years, including polyethylene oxide (PEO), Li7La3Zr2O12 (LLZO), succinonitrile (SN), and Li salt (LiTFSI), is employed to solve the limitations of ASSLBs. LLZO codoped with Al3+ and Nb5+ (NAL) is synthesized at a low temperature using a modified sol‐gel Pechini method. NAL, along with SN, plays a critical role in improving the performance of the resultant solid polymer electrolyte, which can be operated at room temperature. The integrated electrolyte PEO/LiTFSI‐SN‐NAL (PLS‐NAL) delivers a high ionic conductivity of 3.09 × 10−4 S cm−1 and an excellent Li‐ion transference number of 0.75 at room temperature. ASSLBs combining LiFePO4 and PLS‐NAL exhibit excellent cycling stability at both room temperature and 45 °C with a high capacity retention of ≈90% after 200 cycles and cycle life of up to 400 cycles.
Recent Advances of Bismuth Halide Based Nanomaterials for Photocatalytic Antibacterial and Photodynamic Therapy
Authors: Sun Jingyu , Chen Xue , Mo Shudi , Zhang Ze , Guo Donggang , Li Yaohua , Liu Lu
Published: September 2022

Studies of layered structure nanomaterials is greatly explored to provide enormous potential for the development of photocatalytic bioapplication. As one of the layered nanomaterials, bismuth halide nanomaterials have attracted much attention due to their outstanding properties, such as excellent optoelectronic performance, higher biosafety, high abundance, etc. Here, a brief review of recent research progress of bismuth halide based nanomaterials (BiONs) in bioapplication is provided, mainly including photocatalytic antibacterial and photodynamic therapy. Surface engineering strategies, including doping, heterojunction, morphology control, vacancy engineering, facet engineering, and others, are employed to develop a high photoactivity and better biological compatibility of BiONs. In this review, the major challenges of BiONs during the photoreaction process are discussed and promising strategies are proposed for superior photocatalytic performance in biological area. It is hoped that this review may offer new insights into the development of highly active nanomaterials in bioapplication.
Organic Afterglow Emulsions Exhibiting 2.4 s Phosphorescence Lifetimes and Specific Protein Binding Property
Authors: Liu Jiahui , Sun Yan , Wang Guangming , Chen Xiuzheng , Li Jiuyang , Wang Xuepu , Zou Yunlong , Wang Biaobing , Zhang Kaka
Published: September 2022

Aqueous afterglow dispersions display promising biomedical applications due to their long‐lived excited states, whereas it is a common problem in the research field that processing and transferring solid‐state afterglow materials into aqueous medium can cause significant drop and even complete loss of their afterglow properties. Here, aqueous afterglow dispersions are fabricated from liquid precursors by dopant–matrix strategy and emulsion polymerization, which avoids the processing procedures on solid‐state materials and achieves 2.4 s long phosphorescence lifetimes in aqueous medium. Luminescent difluoroboron β‐diketonate dopants are first designed with small rate constant of phosphorescence decay and then dissolved in monomers. After emulsion polymerization, the as‐formed polymer latex particles not only assist dopants’ intersystem crossing but also provide a glassy microenvironment to largely suppress nonradiative decay of dopants’ triplets, leading to in situ formation of aqueous afterglow dispersions. This provides a robust method for constructing afterglow emulsions with long‐term colloidal stability, relatively high solid contents, tunable sizes, and diverse compositions. Through emulsion copolymerization, afterglow emulsions decorated with specific ligands are obtained to exhibit specific protein binding properties. Such decorated afterglow emulsions address the issue that afterglow materials lack biorecognition property and can pave the way for their applications in immunoassay and immunoimaging.