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1.
Adv Food Nutr Res ; 111: 71-91, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39103218

RESUMO

Meeting food safety requirements without jeopardizing quality attributes or sustainability involves adopting a holistic perspective of food products, their manufacturing processes and their storage and distribution practices. The virtualization of the food supply chain offers opportunities to evaluate, simulate, and predict challenges and mishaps potentially contributing to present and future food safety risks. Food systems virtualization poses several requirements: (1) a comprehensive framework composed of instrumental, digital, and computational methods to evaluate internal and external factors that impact food safety; (2) nondestructive and real-time sensing methods, such as spectroscopic-based techniques, to facilitate mapping and tracking food safety and quality indicators; (3) a dynamic platform supported by the Internet of Things (IoT) interconnectivity to integrate information, perform online data analysis and exchange information on product history, outbreaks, exposure to risky situations, etc.; and (4) comprehensive and complementary mathematical modeling techniques (including but not limited to chemical reactions and microbial inactivation and growth kinetics) based on extensive data sets to make realistic simulations and predictions possible. Despite current limitations in data integration and technical skills for virtualization to reach its full potential, its increasing adoption as an interactive and dynamic tool for food systems evaluation can improve resource utilization and rational design of products, processes and logistics for enhanced food safety. Virtualization offers affordable and reliable options to assist stakeholders in decision-making and personnel training. This chapter focuses on definitions and requirements for developing and applying virtual food systems, including digital twins, and their role and future trends in enhancing food safety.


Assuntos
Inocuidade dos Alimentos , Abastecimento de Alimentos , Humanos
2.
Sensors (Basel) ; 24(14)2024 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-39066047

RESUMO

GPUs are commonly used to accelerate the execution of applications in domains such as deep learning. Deep learning applications are applied to an increasing variety of scenarios, with edge computing being one of them. However, edge devices present severe computing power and energy limitations. In this context, the use of remote GPU virtualization solutions is an efficient way to address these concerns. Nevertheless, the limited network bandwidth might be an issue. This limitation can be alleviated by leveraging on-the-fly compression within the communication layer of remote GPU virtualization solutions. In this way, data exchanged with the remote GPU is transparently compressed before being transmitted, thus increasing network bandwidth in practice. In this paper, we present the implementation of a parallel compression pipeline designed to be used within remote GPU virtualization solutions. A thorough performance analysis shows that network bandwidth can be increased by a factor of up to 2×.

3.
Sci Rep ; 14(1): 15294, 2024 Jul 03.
Artigo em Inglês | MEDLINE | ID: mdl-38961120

RESUMO

Reliability mapping of 5G low orbit constellation network slice is an important means to ensure link network communication. The problem of state space explosion is a typical problem. The deep reinforcement learning method is introduced. Under the 5G low orbit constellation integrated network architecture based on software definition network (SDN) and network function virtualization (NFV), the resource requirements and resource constraints of the virtual network function (VNF) are comprehensively considered to build the 5G low orbit constellation network slice reliability mapping model, and the reliability mapping model parameters are trained and learned by using deep reinforcement learning, solve the problem of state space explosion in the reliability mapping process of 5G low orbit constellation network slices. In addition, node backup and link backup strategies based on importance are adopted to solve the problem that VNF/link reliability is difficult to meet in the reliability mapping process of 5G low orbit constellation network slice. The experimental results show that this method improves the network throughput, packet loss rate and intra slice traffic of 5G low orbit constellation, and can completely repair network faults within 0.3 s; For different number of 5G low orbit constellation network slicing requests, the reliability of this method remains above 98%; For SFC with different lengths, the average network delay of this method is less than 0.15 s.

4.
Sensors (Basel) ; 24(14)2024 Jul 12.
Artigo em Inglês | MEDLINE | ID: mdl-39065909

RESUMO

This research proposes advanced model-based control strategies for a countercurrent flow plate heat exchanger in a virtual environment. A virtual environment with visual and auditory effects is designed, which requires a mathematical model describing the real dynamics of the process; this allows parallel fluid movement in different directions with hot and cold temperatures at the outlet, incorporating control monitoring interfaces as communication links between the virtual heat exchanger and control applications. A multivariable and non-linear process like the plate and countercurrent flow heat exchanger requires analysis in the controller design; therefore, this work proposes and compares two control strategies to identify the best-performing one. The first controller is based on the inverse model of the plant, with linear algebra techniques and numerical methods; the second controller is a model predictive control (MPC), which presents optimal control actions that minimize the steady-state errors and aggressive variations in the actuators, respecting the temperature constraints and the operating limits, incorporating a predictive model of the plant. The controllers are tested for different setpoint changes and disturbances, determining that they are not overshot and that the MPC controller has the shortest settling time and lowest steady-state error.

5.
Front Robot AI ; 11: 1358978, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38721393

RESUMO

As the area of robotics achieves promising results, there is an increasing need to scale robotic software architectures towards real-world domains. Traditionally, robotic architectures are integrated using common frameworks, such as ROS. Therefore, systems with a uniform structure are produced, making it difficult to integrate third party contributions. Virtualisation technologies can simplify the problem, but their use is uncommon in robotics and general integration procedures are still missing. This paper proposes and evaluates a containerised approach for designing and integrating multiform robotic architectures. Our approach aims at augmenting preexisting architectures by including third party contributions. The integration complexity and computational performance of our approach is benchmarked on the EU H2020 SecondHands robotic architecture. Results demonstrate that our approach grants simplicity and flexibility of setup when compared to a non-virtualised version. The computational overhead of using our approach is negligible as resources were optimally exploited.

6.
Sensors (Basel) ; 24(7)2024 Mar 22.
Artigo em Inglês | MEDLINE | ID: mdl-38610235

RESUMO

In a LoRaWAN network, the backend is generally distributed as Software as a Service (SaaS) based on container technology, and recently, a containerized version of the LoRaWAN node stack is also available. Exploiting the disaggregation of LoRaWAN components, this paper focuses on the emulation of complex end-to-end architecture and infrastructures for smart city scenarios, leveraging on lightweight virtualization technology. The fundamental metrics to gain insights and evaluate the scaling complexity of the emulated scenario are defined. Then, the methodology is applied to use cases taken from a real LoRaWAN application in a smart city with hundreds of nodes. As a result, the proposed approach based on containers allows for the following: (i) deployments of functionalities on diverse distributed hosts; (ii) the use of the very same SW running on real nodes; (iii) the simple configuration and management of the emulation process; (iv) affordable costs. Both premise and cloud servers are considered as emulation platforms to evaluate the resource request and emulation cost of the proposed approach. For instance, emulating one hour of an entire LoRaWAN network with hundreds of nodes requires very affordable hardware that, if realized with a cloud-based computing platform, may cost less than USD 1.

7.
Sensors (Basel) ; 24(7)2024 Mar 29.
Artigo em Inglês | MEDLINE | ID: mdl-38610401

RESUMO

In recent years, headphones have become increasingly popular worldwide. There are numerous models on the market today, varying in technical characteristics and offering different listening experiences. This article presents an application for simulating the sound response of specific headphone models by physically wearing others. In the future, for example, this application could help to guide people who already own a pair of headphones during the decision-making process of purchasing a new headphone model. However, the potential fields of application are much broader. An in-depth study of digital signal processing was carried out with the implementation of a computational model. Prior to this, an analysis was performed on impulse response measurements of specific headphones, which allowed for a better understanding of the behavior of each set of headphones. Finally, an evaluation of the entire system was conducted through a listening test. The analysis of the results showed that the software works reasonably well in replicating the target headphones. We hope that this work will stimulate further efforts in the same direction.

8.
Sensors (Basel) ; 24(2)2024 Jan 18.
Artigo em Inglês | MEDLINE | ID: mdl-38257707

RESUMO

Focusing on the problem of strip shape quality control in the finishing process of hot rolling, a shape model based on metal flow and stress release with the application of varying contact rolling parameters is introduced. Combined with digital twin technology, the digital twin framework of the shape model is proposed, which realizes the deep integration between physical time-space and virtual time-space. With the utilization of the historical data, the parameters are optimized iteratively to complete the digital twin of the shape model. According to the schedule, the raw material information is taken as the input to obtain the simulation of the strip shape, which shows a variety of export shape conditions. The prediction absolute error of the crown and flatness are less than 5 µm and 5 I-unit, respectively. The results prove that the proposed shape simulation model with strong prediction performance can be effectively applied to hot rolling production. In addition, the proposed model provides operators with a reference for the parameter settings for actual production and promotes the intelligent application of a shape control strategy.

9.
Podium (Pinar Río) ; 18(3)dic. 2023.
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1521335

RESUMO

El desarrollo de las Tecnologías de la Información y las Comunicaciones (TIC) genera nuevas demandas sociales a la educación. En los últimos años, la utilización de elementos tecnológicos en los contextos educativos ha conllevado a la realización de profundas transformaciones en las instituciones y en la forma de organizar y trabajar el proceso docente educativo. El objetivo de este artículo fue analizar el estado inicial de la virtualización del proceso de formación en la Universidad de Ciencias de la Cultura Física y Deporte Manuel Fajardo. Para lograr este propósito se aplicó un conjunto de instrumentos (encuestas a estudiantes y profesores, entrevistas a directivos y guía de observación a los cursos implementados en la plataforma virtual Moodle). Se asumió un enfoque mixto que posibilitó buscar información sobre la virtualización del proceso de formación de la Universidad de Ciencias de la Cultura Física y el Deporte (UCCFD) Manuel Fajardo desde las miradas de los distintos actores del proceso, lo que permitió lograr una mayor fidelidad de los resultados obtenidos en los instrumentos aplicados. Los resultados de las encuestas a estudiantes y profesores fueron divididos en positivos y negativos (Carencias y Fortalezas), para destacar la necesidad de elaborar un modelo de virtualización del proceso de formación de la UCCFD "Manuel Fajardo".


O desenvolvimento das Tecnologias de Informação e Comunicação (TIC) gera novas demandas sociais para a educação. Nos últimos anos, o uso de elementos tecnológicos em contextos educacionais levou a profundas transformações nas instituições e na forma de organizar e trabalhar o processo de ensino e educação. O objetivo deste artigo foi analisar o estado inicial da virtualização do processo de treinamento na Universidade Manuel Fajardo de Cultura Física e Ciências do Esporte. Para atingir esse objetivo, foi aplicado um conjunto de instrumentos (pesquisas com alunos e professores, entrevistas com diretores e um guia de observação dos cursos implementados na plataforma virtual Moodle). Foi adotada uma abordagem mista, que possibilitou a busca de informações sobre a virtualização do processo de treinamento na Universidade de Ciências da Cultura Física e do Esporte Manuel Fajardo (UCCFD) a partir dos pontos de vista dos diferentes atores do processo, o que permitiu obter maior precisão nos resultados obtidos nos instrumentos aplicados. Os resultados das pesquisas com alunos e professores foram divididos em positivos e negativos (deficiências e pontos fortes), a fim de destacar a necessidade de desenvolver um modelo de virtualização para o processo de formação na UCCFD "Manuel Fajardo".


The development of Information and Communication Technologies (ICT) generates new social demands on education. In recent years, the use of technological elements in educational contexts has led to profound transformations in institutions and in the way of organizing and working the educational teaching process. The objective of this article was to analyze the initial state of the virtualization of the training process at the Manuel Fajardo University of Physical Culture and Sports Sciences. To achieve this purpose, a set of instruments was applied (surveys to students and teachers, interviews with managers and an observation guide to the courses implemented on the Moodle virtual platform). A mixed approach was assumed that made it possible to search for information on the virtualization of the training process of the "Manuel Fajardo" University of Physical Culture and Sports Sciences (UCCFD in Spanish) from the perspectives of the different actors in the process, which allowed achieving greater fidelity of the results obtained in the applied instruments. The results of the surveys to students and teachers were divided into positive and negative (Shortcomings and Strengths), to highlight the need to develop a virtualization model of the training process of the UCCFD "Manuel Fajardo".

10.
Sensors (Basel) ; 23(10)2023 May 12.
Artigo em Inglês | MEDLINE | ID: mdl-37430613

RESUMO

Virtualization is a core 5G network technology which helps telecom companies significantly reduce capital expenditure and operating expenses by deploying multiple services on the same hardware infrastructure. However, providing QoS-guaranteed services for multi-tenants poses a significant challenge due to multi-tenant service diversity. Network slicing has been proposed as a means of addressing this problem by isolating computing and communication resources for the different tenants of different services. However, optimizing the allocation of the network and computation resources across multiple network slices is a critical but extremely difficult problem. Accordingly, this study proposes two heuristic algorithms, namely Minimum Cost Resource Allocation (MCRA) and Fast Latency Decrease Resource Allocation (FLDRA), to perform dynamic path routing and resource allocation for multi-tenant network slices in a two-tier architecture. The simulation results show that both algorithms significantly outperform the Upper-tier First with Latency-bounded Overprovisioning Prevention (UFLOP) algorithm proposed in previous work. Furthermore, the MCRA algorithm achieves a higher resource utilization than the FLDRA algorithm.

11.
Sensors (Basel) ; 23(11)2023 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-37299838

RESUMO

The 5G network is designed to serve three main use cases: enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and ultra-reliable and low-latency communications (uRLLC). There are many new technological enablers, including the cloud radio access network (C-RAN) and network slicing, that can support 5G and meet its requirements. The C-RAN combines both network virtualization and based band unit (BBU) centralization. Using the network slicing concept, the C-RAN BBU pool can be virtually sliced into three different slices. 5G slices require a number of Quality of service (QoS) metrics, such as average response time and resource utilization. In order to enhance the C-RAN BBUs utilization while protecting the minimum QoS of the coexisting three slices, a priority-based resource allocation with queuing model is proposed. The uRLLC is given the highest priority, while eMBB has a higher priority than mMTC services. The proposed model allows the eMBB and mMTC to be queued and the interrupted mMTC to be restored in its queue to increase its chance to reattempt the service later. The proposed model's performance measures are defined and derived using a continuous-time Markov chain (CTMC) model and evaluated and compared using different methodologies. Based on the results, the proposed scheme can increase C-RAN resource utilization without degrading the QoS of the highest-priority uRLLC slice. Additionally, it can reduce the forced termination priority of the interrupted mMTC slice by allowing it to re-join its queue. Therefore, the comparison of the results shows that the proposed scheme outperforms the other states of the art in terms of improving the C-RAN utilization and enhancing the QoS of eMBB and mMTC slices without degrading the QoS of the highest priority use case.


Assuntos
Conscientização , Comunicação , Benchmarking , Cadeias de Markov , Alocação de Recursos
12.
Sensors (Basel) ; 23(11)2023 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-37299985

RESUMO

In audio transduction applications, virtualization can be defined as the task of digitally altering the acoustic behavior of an audio sensor or actuator with the aim of mimicking that of a target transducer. Recently, a digital signal preprocessing method for the virtualization of loudspeakers based on inverse equivalent circuit modeling has been proposed. The method applies Leuciuc's inversion theorem to obtain the inverse circuital model of the physical actuator, which is then exploited to impose a target behavior through the so called Direct-Inverse-Direct Chain. The inverse model is designed by properly augmenting the direct model with a theoretical two-port circuit element called nullor. Drawing on this promising results, in this manuscript, we aim at describing the virtualization task in a broader sense, including both actuator and sensor virtualizations. We provide ready-to-use schemes and block diagrams which apply to all the possible combinations of input and output variables. We then analyze and formalize different versions of the Direct-Inverse-Direct Chain describing how the method changes when applied to sensors and actuators. Finally, we provide examples of applications considering the virtualization of a capacitive microphone and a nonlinear compression driver.


Assuntos
Acústica , Transdutores , Desenho de Equipamento
13.
Sensors (Basel) ; 23(11)2023 Jun 05.
Artigo em Inglês | MEDLINE | ID: mdl-37300067

RESUMO

Network function virtualization (NFV) is a rapidly growing technology that enables the virtualization of traditional network hardware components, offering benefits such as cost reduction, increased flexibility, and efficient resource utilization. Moreover, NFV plays a crucial role in sensor and IoT networks by ensuring optimal resource usage and effective network management. However, adopting NFV in these networks also brings security challenges that must promptly and effectively address. This survey paper focuses on exploring the security challenges associated with NFV. It proposes the utilization of anomaly detection techniques as a means to mitigate the potential risks of cyber attacks. The research evaluates the strengths and weaknesses of various machine learning-based algorithms for detecting network-based anomalies in NFV networks. By providing insights into the most efficient algorithm for timely and effective anomaly detection in NFV networks, this study aims to assist network administrators and security professionals in enhancing the security of NFV deployments, thus safeguarding the integrity and performance of sensors and IoT systems.


Assuntos
Algoritmos , Aprendizado de Máquina , Resolução de Problemas , Tecnologia
14.
Rev. Costarric. psicol ; 42(1): 65-80, ene.-jun. 2023. tab
Artigo em Espanhol | LILACS, SaludCR | ID: biblio-1559028

RESUMO

Resumen Durante la pandemia por COVID-19 se dio una acelerada virtualización de los procesos de atención psicológica en Costa Rica, en paralelo a la expansión en la regulación de esta modalidad por parte del Colegio de Profesionales en Psicología de Costa Rica. El presente artículo tiene el objetivo de identificar valoraciones de personas del gremio de profesionales en psicología de Costa Rica sobre sus habilidades terapéuticas y técnicas para ejercer psicoterapia clínica individual mediante las Tecnologías de la Información y Comunicación (TIC) durante la Pandemia por COVID-19. Mediante la aplicación de un cuestionario autoadministrado en línea, se realizó un acercamiento al gremio, donde se consultó sobre las estrategias, herramientas y habilidades que puso en práctica para comenzar a utilizar las TIC en su ejercicio psicoterapéutico. Se obtuvieron experiencias muy importantes, aprendizajes sobre la marcha y, sobre todo, la ausencia de un consenso y claridad entre las personas profesionales en psicología sobre las buenas prácticas para el uso de esta modalidad. Como principal reflexión del proceso, se invita al gremio a ejercitar al máximo las habilidades de terapeuta, especialmente aquellas que quizá no resulten empleadas regularmente durante una consulta a distancia, como la observación y el examen clínico integral.


Abstract During the COVID-19 Pandemic, the virtualization of psychological care grew rapidly in Costa Rica, parallel to the expansion of regulation for this modality in the Colegio de Profesionales en Psicología de Costa Rica. The objective of this article is to identify the appraisals of Costa Rican psychology professionals regarding their abilities to practice individual clinical psychotherapy by means of Information and Communication Technologies (ICT) during the COVID-19 Pandemic. Through the completion of a self-administered online questionnaire, professionals were consulted about the strategies, tools and skills that they put into play during the use of ICTs in their psychotherapeutic practice, narrating deeply important experiences, presenting key learnings and above all, making visible the absence of a consensus and clarity regarding the best practices for use in this modality. The main recommendation emanating from this process is to promote to the maximum continuing-education on the topic of therapist skills, especially those that may not be used regularly during a remote consultation, such as observation and comprehensive clinical examination.


Assuntos
Humanos , Masculino , Feminino , Psicologia , Processos Psicoterapêuticos , Educação a Distância , Comunicação por Videoconferência/tendências , Costa Rica , Realidade Virtual , COVID-19
15.
Int. j. morphol ; 41(3): 863-872, jun. 2023. tab, graf
Artigo em Espanhol | LILACS | ID: biblio-1514306

RESUMO

Debido a la pandemia y las restricciones en cuanto a la presencialidad, diferentes metodologías de aprendizaje debieron ser exploradas e implementadas para virtualizar los contenidos en la asignatura de Anatomía. El objetivo de este trabajo fue evaluar la percepción de los docentes y alumnos con respecto a las metodologías utilizadas en la virtualización de dicha asignatura. Estudio observacional- descriptivo, con enfoque cuantitativo. La población de estudio correspondió a una muestra por conveniencia constituida por 57 alumnos y 4 docentes pertenecientes a la asignatura de Anatomía Humana Normal y Embriología de la carrera de Odontología, Universidad Andrés Bello, sede Viña del Mar, dictada el año 2021. Dichos participantes contestaron un cuestionario validado que contemplaba preguntas cerradas con escala de Likert de 5 niveles, considerando las dimensiones de aprendizaje, motivación y rendimiento, y preguntas de calificación para conocer la percepción sobre las estrategias y recursos utilizados. Los alumnos perciben positivamente todos los recursos digitales, destacando el Manual de Anatomía Humana Normal, siendo el aprendizaje, la dimensión mejor evaluada. La estrategia activa mejor percibida en cuanto a las 3 dimensiones corresponde a método de casos. Por el contrario, las clases invertidas fueron percibidas negativamente en todas las dimensiones. En relación a los docentes, el recurso digital mejor percibido fue videos y cápsulas, destacando la dimensión motivación. Las estrategias activas mejor evaluadas fueron método de casos y clases invertidas. Pese a haber una percepción positiva con respecto a la virtualización, no hay concordancia entre las estrategias activas y recursos digitales mejor evaluados entre docentes y alumnos.


SUMMARY: As a result of the pandemic and the restrictions regarding in person attendance, different learning methodologies had to be explored and implemented to virtualize the contents in the Anatomy subject. The objective of this study was to evaluate the perception of teachers and students regarding the methodologies used in the virtualization of this subject. An observational-descriptive study with a quantitative approach was carried out. The study population was a convenience sample made up of 57 students and 4 teachers of the Normal Human Anatomy and Embryology subject of the Dentistry degree, Universidad Andrés Bello, Viña del Mar campus during 2021. These participants answered a validated questionnaire that included closed questions with a 5-level Likert scale, considering learning dimensions, motivation and performance, and qualifying questions to find out the perception of the strategies and resources used. Students positively perceive all digital resources, highlighting the Normal Human Anatomy Manual, with learning being the best evaluated dimension. The best perceived active strategy in terms of the 3 dimensions corresponds to the case method. In contrast, the inverted classes were perceived negatively in all dimensions. In relation to teachers, the best perceived digital resource was videos and capsules, highlighting the motivation dimension. The best evaluated active strategies were the case method and inverted classes. Despite having a positive perception regarding virtualization, there is no agreement between the best evaluated active strategies and digital resources among teachers and students.


Assuntos
Humanos , Estudantes de Odontologia/psicologia , Educação a Distância , Docentes de Odontologia/psicologia , Anatomia/educação , Percepção , Embriologia/educação , Inquéritos e Questionários , Odontologia , Avaliação Educacional
16.
Adv Exp Med Biol ; 1406: 171-186, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37016115

RESUMO

In the post-pandemic era, one of the significant challenges for anatomy teachers is to reciprocate the experience of practical exposure while teaching the subject to undergraduates. These challenges span from conducting cadaveric dissections to handling real human bones, museum specimens, and tissue sections in the histology lab. Such exposures help the instructors to develop interactive communication with their fellow students and thus help to enhance communication skills among them. Recently, anatomy teachers all over the world started using cutting-edge educational technologies to make teaching-learning experiences for students more engaging, interesting, and interactive. Utilizing such cutting-edge educational technologies was an "option" prior to the pandemic, but the pandemic has significantly altered the situation. What was previously an "option" is now a "compulsion." Despite the fact that the majority of medical schools have resumed their regular on-campus classes, body donation and the availability of cadavers remain extremely limited, resulting in a deadlock. Anatomy teachers must incorporate cutting-edge educational technologies into their teaching and learning activities to make the subject more visual. In this chapter, we have attempted to discuss various new technologies which can provide a near-realistic perception of anatomical structures as a complementary tool for dissection/cadaver, various visualization techniques currently available and explore their importance as a pedagogic alternative in learning anatomy. We also discussed the recent advancement in visualization techniques and the pros and cons of technology-based visualization. This chapter identifies the limitations of technology-based visualization as a supplement and discusses effective utilization as an adjunct to the conventional pedagogical approaches to undergraduate anatomy education.


Assuntos
Educação de Graduação em Medicina , Estudantes de Medicina , Humanos , Currículo , Educação de Graduação em Medicina/métodos , Aprendizagem , Dissecação/educação , Cadáver
17.
Front Psychol ; 14: 1084180, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36874871

RESUMO

The post-pandemic COVID-19 has been influential in accelerating the digital transformation of enterprises and business process virtualization. However, in a virtual working environment with no physical interaction, the psychological requirements of the communication between teleworkers and the negative impact of information systems are hindering the business process virtualization. Studying the relationship between the interaction between organizational members and job performance is an important part of organizational psychology. For an enterprise to maintain high-efficiency output, it is necessary to study psychological factors related to business process virtualization. This paper verified the factors hindering business process virtualization based on process virtualization theory (PVT). The research was implemented on a sample of 343 teleworkers in China enterprises. The structure of the model of this study includes two aspects that hinder the business process virtualization: the psychological requirements of teleworkers (Sensory requirements, Synchronism requirements, and Relationship requirements) and the negative effects of information systems (Information overload and Communication overload). The results show that teleworkers' sensory requirements, synchronism requirements, and communication overload negatively impact business process virtualization. However, unlike the results in the existing literature, the relationship requirements and information overload do not affect the business process virtualization. The results will help business managers, teleworkers, and information system developers develop strategies to address the negative factors hindering business process virtualization. In the so-called new "normal era," our research will help companies to create a successful virtual work environment.

18.
Sensors (Basel) ; 23(5)2023 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-36904890

RESUMO

The growing number of cyber-crimes is affecting all industries worldwide, as there is no business or industry that has maximum protection in this domain. This problem can produce minimal damage if an organization has information security audits periodically. The process of an audit includes several steps, such as penetration testing, vulnerability scans, and network assessments. After the audit is conducted, a report that contains the vulnerabilities is generated to help the organization to understand the current situation from this perspective. Risk exposure should be as low as possible because in cases of an attack, the entire business is damaged. In this article, we present the process of an in-depth security audit on a distributed firewall, with different approaches for the best results. The research of our distributed firewall involves the detection and remediation of system vulnerabilities by various means. In our research, we aim to solve the weaknesses that have not been solved to date. The feedback of our study is revealed with the help of a risk report in the scope of providing a top-level view of the security of a distributed firewall. To provide a high security level for the distributed firewall, we will address the security flaws uncovered in firewalls as part of our research.

19.
Sensors (Basel) ; 23(6)2023 Mar 12.
Artigo em Inglês | MEDLINE | ID: mdl-36991766

RESUMO

With the advent of Software Defined Network (SDN) and Network Functions Virtualization (NFV), network operators can offer Service Function Chain (SFC) flexibly to accommodate the diverse network function (NF) requirements of their users. However, deploying SFCs efficiently on the underlying network in response to dynamic SFC requests poses significant challenges and complexities. This paper proposes a dynamic SFC deployment and readjustment method based on deep Q network (DQN) and M Shortest Path Algorithm (MQDR) to address this problem. We develop a model of the dynamic deployment and readjustment of the SFC problem on the basis of the NFV/SFC network to maximize the request acceptance rate. We transform the problem into a Markov Decision Process (MDP) and further apply Reinforcement Learning (RL) to achieve this goal. In our proposed method (MQDR), we employ two agents that dynamically deploy and readjust SFCs collaboratively to enhance the service request acceptance rate. We reduce the action space for dynamic deployment by applying the M Shortest Path Algorithm (MSPA) and decrease the action space for readjustment from two dimensions to one. By reducing the action space, we decrease the training difficulty and improve the actual training effect of our proposed algorithm. The simulation experiments show that MDQR improves the request acceptance rate by approximately 25% compared with the original DQN algorithm and 9.3% compared with the Load Balancing Shortest Path (LBSP) algorithm.

20.
Educ. med. super ; 37(1)mar. 2023. ilus
Artigo em Espanhol | LILACS, CUMED | ID: biblio-1514078

RESUMO

Introducción: Los cambios en la educación médica superior, provocados por la pandemia del virus SARS-CoV-2, impulsaron la integración de las tecnologías de la información y la comunicación a la docencia en Cuba y el mundo. La Universidad Virtual de Salud se convirtió en un medio importante para apoyar los procesos docente-educativos, por lo que los profesores tuvieron que afrontar el reto de virtualizar sus actividades formativas. Objetivo: Validar una guía para el diseño y montaje de entornos virtuales de enseñanza aprendizaje en la educación médica de pregrado y posgrado. Métodos: Se realizó una investigación de tipo innovación tecnológica en tres etapas: diseño de la guía, implementación y validación. Se aplicó una encuesta a los participantes del entrenamiento virtual en Entornos Virtuales de Enseñanza Aprendizaje. Resultados: Se propusieron seis pasos para el diseño y la implementación de procesos formativos mediante la virtualidad: análisis de los recursos y la factibilidad; diseño del curso o adaptación de un programa existente; producción de contenidos; subida de recursos y configuración de las actividades; acción formativa; y evaluación del curso, mejora y rediseño. Conclusiones: La integración de la tecnología a la docencia en la educación superior es una realidad impulsada por la situación epidemiológica, que se seguirá desarrollando hasta que forme parte de la labor habitual del docente. Esta guía sistematiza y simplifica las acciones para facilitar el proceso inicial de virtualización. Se propone un modelo flexible y escalable para mejorar continuamente la calidad del proceso docente educativo en entornos virtuales de enseñanza aprendizaje(AU)


Introduction: Changes in higher medical education, caused by the SARS-CoV-2 virus pandemic, prompted the integration of information and communication technologies to teaching in Cuba and the world. The virtual university of health became an important means to support the teaching-educational processes; therefore, professors had to face the challenge of virtualizing their training activities. Objective: To validate a guide for designing and assembling virtual teaching-learning environments in undergraduate and postgraduate medical education. Methods: A technological innovation research was carried out in three stages: design of the guide, implementation and validation. A survey was conducted to the participants of the virtual training in virtual teaching-learning environments. Results: Six steps were proposed for the design and implementation of training processes through the virtual modality: analysis of resources and feasibility; course design or adaptation of an existing program; content production; resource uploading and activity configuration; training action; and course assessment, improvement and redesign. Conclusions: The integration of technology to higher education teaching is a reality driven by the epidemiological situation, which will continue to develop until it becomes part of the professor's regular work. This guide systematizes and simplifies actions to facilitate the initial virtualization process. A flexible and scalable model is proposed to improve continuously the quality of the educational teaching process in virtual teaching-learning environments(AU)


Assuntos
Humanos , Guia , Docentes/educação , Educação a Distância/métodos
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