bluuebunny/crossref_metadata_2025 huggingface dataset:
Contribución a la caracterización de los sistemas de comunicaciones móviles: alternativas a la mejora de la capacidad de un sistema
Authors:   , Gorricho Moreno Juan Luis
Published: September 2023

Esta Tesis presenta un estudio detallado de los mecanismos de control de potencia para un sistema de comunicaciones móviles basado en la técnica de multiplexado CDMA. En particular se ha llevado a cabo una evaluación de la capacidad de los sistemas que combinan el uso del control de potencia y la técnica de "soft handover" en sus diferentes modalidades de combinación de las señales recibidas. Adicionalmente el estudio incluye la evaluación de la capacidad de los sistemas móviles CDMA cuando éstos en el futuro den servicio a las aplicaciones multimedia.

El estudio incluye una original y sencilla demostración analítica de dimensionado de la capacidad de los sistemas CDMA que utilizan "maximal ratio" como técnica de combinación de señales recibidas en macrodiversidad. Otro de los puntos originales de esta Tesis es la propuesta de un nuevo mecanismo de asignación de estaciones base entre terminales móviles comunicantes, óptimo en términos de capacidad.

Se parte de un estudio analítico de los sistemas CDMA con diferentes alternativas de combinación de las señales recibidas y se construye un entorno de simulación que se emplea como herramienta de validación de los resultados analíticos.

El trabajo realizado profundiza en el aspecto clave de los llamados sistemas móviles de tercera generación. Más concretamente en el control de potencia y la macrodiversidad. Los resultados son novedosos y aportan soluciones en las áreas especificadas. Esta opinión está refrendada por las publicaciones de los resultados en congresos y revistas de ámbito internacional.

This Thesis presents an in depth study on the power control mechanism used in mobile communications based on the CDMA multiplexing technique. In particular, the study develops an in depth evaluation on the capacity of those systems combining the power control and the soft-handover technique in its different modalities. In addition, the study includes the evaluation on the system capacity when the future multimedia services will be included.

The PhD thesis includes an original analytical demonstration of the CDMA system capacity using the maximal ratio technique to combine different signals received in macro diversity. Another original issue within this PhD. thesis is the proposal of a new mechanism to assign the base stations among the participant mobile terminals in terms of optimum capacity.

Starting from an analytical study of the CDMA systems with different alternatives to combine the received signals, a simulation environment has been developed to demonstrate the accuracy of the analytical results.

The PhD. thesis performs an in depth study of the most critical aspect for the third generation mobile systems, in particular: the power control and the macro diversity. The results are original and contribute to the specified areas as the resultant international publications demonstrate.
Contribución a la evaluación y dimensionado de nodos y enlaces en redes de alta velocidad
Authors:   , Pallarès Segarra Esteve
Published: September 2023

La tendencia de las redes actuales de telecomunicaciones es la integración de todo tipo de servicios los cuales demandan distintos criterios de calidad. A pesar de ello se siguen utilizando redes clásicas que originalmente fueron pensadas para soportar un único tipo de servicio. Dichas redes son adaptadas para poder soportar con mayor o menor éxito la demanda de nuevos servicios exigida por los usuarios. En este entorno parece lógico desarrollar nuevas herramientas que permitan evaluar el comportamiento de estas redes integradoras de servicios.

En este trabajo se han desarrollado nuevas herramientas de análisis para estudiar la de pérdida de información en el buffer de un multiplexor. Para caracterizar el tráfico agregado se ha utilizado un modelo de fluidos con fuentes ON-OFF heterogéneas. Así pues a partir de modelos fiables de tráfico real basados en fuentes ON-OFF es posible utilizar estas herramientas para el diseño y dimensionado de redes de telecomunicaciones. Se han desarrollado técnicas analíticas que permiten obtener una mayor precisión en el cálculo de la probabilidad de pérdida. En el caso de utilizar muchas fuentes, el cálculo de esta probabilidad puede ser una tarea computacionalmente muy costosa e incluso inabordable. En este trabajo se propone una expresión aproximada que facilita dicho cálculo, de manera que tenga un coste computacional razonable. Se han comparado los resultados obtenidos utilizando la expresión aproximada con los valores exactos, obteniendo un resultado bastante satisfactorio. Además la expresión propuesta también es de utilidad para el diseño y el dimensionamiento de nodos y enlaces en redes de telecomunicaciones.

Finalmente también se ha propuesto un algoritmo heurístico para el diseño de topologías de redes conmutadas en las cuales se quiera acotar la probabilidad de pérdida de la información. Dicho algoritmo consta de dos fases, primero se construye una topología inicial que cumpla con las restricciones de calidad de servicio impuestas a la red. En una segunda fase se intentan combinar pares de nodos para formar uno solo, siempre y cuando se sigan cumpliendo las restricciones de conectividad y de calidad de servicio. El objetivo es obtener una topología con el mínimo número de nodos y de enlaces posible.
Resource optimization in passive optical networks: dynamic bandwidth Allocation, Evolution, and Cost-Effective Capacity Upgrades
Authors:   , Andrade Jardín Marilet de
Published: September 2023

This thesis is a result of contributions to optimize or improve resource allocation in Passive Optical Networks (PON). The contributions are related with resource allocation during PON operation and with the upgrade process to allocate more capacity to the network in an "as-needed" fashion. We first address algorithms for Dynamic Bandwidth Allocation (DBA) in the upstream channel of Ethernet-based PONs through providing a state-of-the-art survey and proposing two algorithms. The proposed DBA results demonstrate improved performance and fairness among users. Then we introduce the problem of allocating new capacity to an existing PON through addition of wavelength (channels) and line-rate upgrades. In this regard, we first analyze possible strategies for PON evolution, and then we provide a new cost-based method to optimize the upgrade process in a per-period basis. The results on PON evolution analysis and our capacity-upgrade method contribute to cost reductions while optimizing new channel allocation, maximizing network capacity usage, and assuring minimum disturbances.

Esta tesis es el resultado de contribuciones para optimizar o mejorar la distribución de recursos en Redes Ópticas Pasivas (PONs). Las contribuciones están relacionadas con el uso de los recursos durante la operación de las PONs y con el proceso de incremento en la capacidad en la red de forma gradual. Primero enfocamos el estudio en algoritmos de Distribución Dinámica de Ancho de Banda (DBA, por las siglas en inglés) sobre el canal ascendente de las redes PON basadas en Ethernet, para lo cual proveemos un resumen del estado del arte y proponemos dos nuevos algoritmos. Los resultados de evaluar los DBA propuestos demuestran mejoras en el rendimiento y mayor justicia entre los usuarios. Posteriormente se introduce el problema de asignar más capacidad a una PON existente mediante la implementación de nuevas longitudes de onda (canales) y aumento de la tasa de línea. Finalmente se plantea un método que minimiza las inversiones en el proceso de migración de las redes PON. Los resultados en el análisis de la evolución de las PONs y nuestro método basado en costos para incrementar la capacidad, contribuyen a reducir la inversión a la vez que se optimiza la implementación y asignación de nuevos canales, maximizando el uso de la capacidad de la red, y asegurando mínimos cortes de servicios.
Security in peer-to-peer communication systems
Authors:   , Suárez Touceda Diego
Published: September 2023

P2PSIP (Peer-to-Peer Session Initiation Protocol) is a protocol developed by the IETF (Internet Engineering Task Force) for the establishment, completion and modi¿cation of communication sessions that emerges as a complement to SIP (Session Initiation Protocol) in environments where the original SIP protocol may fail for technical, ¿nancial, security, or social reasons. In order to do so, P2PSIP systems replace all the architecture of servers of the original SIP systems used for the registration and location of users, by a structured P2P network that distributes these functions among all the user agents that are part of the system. This new architecture, as with any emerging system, presents a completely new security problematic which analysis, subject of this thesis, is of crucial importance for its secure development and future standardization.

Starting with a study of the state of the art in network security and continuing with more speci¿c systems such as SIP and P2P, we identify the most important security services within the architecture of a P2PSIP communication system: access control, bootstrap, routing, storage and communication. Once the security services have been identi¿ed, we conduct an analysis of the attacks that can a¿ect each of them, as well as a study of the existing countermeasures that can be used to prevent or mitigate these attacks. Based on the presented attacks and the weaknesses found in the existing measures to prevent them, we design speci¿c solutions to improve the security of P2PSIP communication systems. To this end, we focus on the service that stands as the cornerstone of P2PSIP communication systems¿ security: access control. Among the new designed solutions stand out: a certi¿cation model based on the segregation of the identity of users and nodes, a model for secure access control for on-the-¿y P2PSIP systems
and an authorization framework for P2PSIP systems built on the recently published Internet Attribute Certi¿cate Pro¿le for Authorization.

Finally, based on the existing measures and the new solutions designed, we de¿ne a set of security recommendations that should be considered for the design, implementation and maintenance of P2PSIP communication systems.
Contributions to QoS and energy efficiency in wi-fi networks
Authors:   , Camps Mur Daniel
Published: September 2023

The Wi-Fi technology has been in the recent years fostering the proliferation of attractive mobile computing devices with broadband capabilities. Current
Wi-Fi radios though severely impact the battery duration of these devices thus limiting their potential applications.
In this thesis we present a set of contributions that address the challenge of increasing energy efficiency in Wi-Fi networks. In particular, we consider
the problem of how to optimize the trade-off between performance and energy effciency in a wide variety of use cases and applications. In this context, we introduce novel energy effcient algorithms for real-time and data applications, for distributed and centralized Wi-Fi QoS and power saving protocols and for Wi-Fi stations and Access Points.
In addition, the di¿erent algorithms presented in this thesis adhere to the following design guidelines: i) they are implemented entirely at layer two, and
can hence be easily re-used in any device with a Wi-Fi interface, ii) they do not require modi¿cations to current 802.11 standards, and can hence be readily deployed in existing Wi-Fi devices, and iii) whenever possible they favor client side solutions, and hence mobile computing devices implementing them can benefit from an increased energy efficiency regardless of the Access Point they connect to. Each of our proposed algorithms is thoroughly evaluated by means of both theoretical analysis and packet level simulations. Thus, the contributions presented in this thesis provide a realistic set of tools to improve energy efficiency in current Wi-Fi networks.
Contributions to efficient and secure exchange of networked clinical data : the MOSAIC system
Authors:   , Lluch-Ariet Magí
Published: September 2023

The understanding of certain data often requires the collection of similar data from different places to be analysed and interpreted. Multi-agent systems (MAS), interoperability standards (DICOM, HL7 or EN13606) and clinical Ontologies, are facilitating data interchange among different clinical centres around the world. However, as more and more data becomes available, and more heterogeneous this data gets, the task of accessing and exploiting the large number of distributed repositories to extract useful knowledge becomes increasingly complex. Beyond the existing networks and advances for data transfer, data sharing protocols to support multilateral agreements are useful to exploit the knowledge of distributed Data Warehouses. The access to a certain data set in a federated Data Warehouse may be constrained by the requirement to deliver another specific data set. When bilateral agreements between two nodes of a network are not enough to solve the constraints for accessing to a certain data set, multilateral agreements for data exchange can be a solution.
The research carried out in this PhD Thesis comprises the design and implementation of a Multi-Agent System for multilateral exchange agreements of clinical data, and evaluate how those multilateral agreements increase the percentage of data collected by a single node from the total amount of data available in the network. Different strategies to reduce the number of messages needed to achieve an agreement are also considered.
The results show that with this collaborative sharing scenario the percentage of data collected dramatically improve from bilateral agreements to multilateral ones, up to reach almost all data available in the network.
PENYULUHAN PERGAULAN BEBAS BAGI REMAJA DESA MALAKASARI BALEENDAH KABUPATEN BANDUNG
Authors: Alderajat Mudayanah Allyka , Toharudin Andi , Yulvani Pertiwi Citra , Putri Mayarani , Zulbetti Rita
Published: September 2023

Pergaulan bebas merupakan salah satu bentuk perilaku menyimpang atau melewati batas norma-norma yang berlaku. Pergaulan bebas di Desa Malakasari khususnya remaja di RW 06 perlu dicegah dengan memilih teman/lingkungan yang baik, serta sadar akan keberhargaan dirinya sendiri. Berdasarkan hasil diskusi terdapat salah seorang warga dengan pengalaman melakukan pendekatan dalam meluruskan warga lainnya yang terjerumus ke dalam pergaulan bebas. Kegiatan edukasi yang dilakukan KKN 67 bertujuan untuk mewujudkan keluarga sehat dan berkarakter. Metode yang digunakan yaitu metode kualitatif dengan teknik observasi, dokumen, serta penelitian deskriptif. Untuk menghindari terjadinya pergaulan bebas ini, dapat dilakukan sosialisasi kepada para remaja terkait buruknya dampak pergaulan bebas. Sosialisasi yang dilakukan dapat dengan cara edukasi kepada para remaja atau dapat juga dilakukan dengan cara pendekatan personal terhadap remaja tersebut. Pendekatan secara personal ini memiliki pengaruh yang baik dalam mengurangi maraknya pergaulan bebas yang sedang marak di zaman sekarang ini.
Assessment of Nurses’ Practices for Neurological Unconscious Patients in Intensive Care Units
Authors: Jaddoue Batool , Ghanim Ali
Published: September 2023

Objective(s): To assess nurses' practices for neurological unconscious patients in intensive care units.Methodology: A descriptive study was conducted that included (50) nurse who are working in intensive careunits in hospitals and departments of the nervous system in (4) hospitals (neuroscience hospital, teachingneurosurgical hospital, surgical specialist hospital, and sheck zaied hospital) in Baghdad city from March, 30th,2009 to July, 30th 2009 for the purpose of assessing their skills towards unconscious patients. A purposive "nonprobabilitysample" was selected that consisted of (50) nurse who are working in intensive care units. Aquestionnaire format and observational checklist were used which consist of (2) parts, the first part includesdemographic information of the sample and the second part includes tools which consists of the observation(7) parts distributed to (64) items. Reliability and validity of questionnaire and observational checklist wasestimated through a pilot study and a panel of expert. The data were analyzed by using descriptive statisticalmeasures which included frequencies, percentages, and standard deviation, as well as the use of inferentialstatistical measures which include the correlation coefficient and coefficient of probability.Results: The results revealed the inadequacy of skills of nurses towards unconscious patients' care in the fieldof airway care, observation and record level of consciousness, hygiene, stimulate the senses and care of urinaryand digestive tract and the adequacy of skills of nurses in the field of measuring and recording vital signs,nutrition, and the environment.Recommendations: Based on the results of research, the study recommends initiating training courses in thefield of intensive care and care of for unconscious patients as well as to design a special mini-booklet for thepurpose of care for unconscious patients.
Assessment of Types of Violence among Adolescents
Authors: Sajem Kareem , Sajem Kareem , Sajem Kareem , Khalifa Mohammed , Sajed Kareem
Published: September 2023

Objective(s): To assess the types of violence among adolescents in Baghdad City.A descripƟve study which was using the assessment approach was conducted on purposive sample of 60 parents ofadolescent for identify types of adolescents violence in their families, was selected according to specific criteria forparticipating in health education program towards adolescents' violence control in Baghdad city.Methodology: A questionnaire was constructed for the purpose of the study. It was consisted of two parts; the firstpart which included the parents' demographic characteristics for parents (sex, age, educational level and socioeconomicstatus); the second part included types of adolescent violence that reported by parents. Data were collectedthrough the interview technique with the parents in the homes, health care centers, and school, from November, 1st2008 to December, 31st 2008. Data were analyzed through use of descripƟve analysis (Frequencies and percentages).Results: The results of the study indicated that the majority of adolescents had physical and psychological violence.So, there was no sexual violence. The study concluded that adolescents' violence is a problem, because it wasdefinitely impacted on health of adolescents and their families.Recommendations: The study recommends that studies and programs can be designed and implemented on theparents and adolescents or together for resolve conflicts, problem–solving approaches and how to prevent risk factorswhich contribute in adolescents' violence.
Assessment of Factors Associated with Prehospital Delay of Patients with Acute Myocardial Infarction
Authors: Jasser Saad , Hassan Hakima
Published: September 2023

Objective(s): to assess the factors which are associated with the prolonged prehospital delay of patients withacute myocardial infarction.Methodology: A descriptive study was conducted at the Coronary Care unit (CCU) in Al-Yarmok TeachingHospital, Ibn AL-Nafis Hospital for Cardiovascular Diseases, AL-Kadumia Teaching Hospital, Baghdad TeachingHospital, and AL-Kindy Teaching Hospital during the period of the study from February 2nd, 2009 to October 30th,2009. A random sample of (160) paƟent who were admiƩed to the hospitals were selected one by one. Aquestionnaire was constructed for the purpose of the study, which is comprised of four parts that include (1)sociodemographic data; (2) prehospital delay time was measured as the time which passed from the momentwhen the patient feels the first symptoms "chest pain" until his arrival to the Coronary Care Unit (CCU) (3)clinical data; (4) factors associated with the prolonged prehospital delay. The data were collected by theapplication of the questionnaire, the interview technique, observation and the patients' sheets.Results: The study findings indicated that the low percentage of the patients with myocardial infarction used anambulance (3; 1.9%) and the remaining (157; 98%) arrived at hospitals by self-transport. It is concluded that alarge proportion of Iraqi patients did not call for an ambulance after the onset of ST–Elevation MyocardialInfarction (STEMI) symptoms.Recommendations: The study recommends that the public should be educated that an ambulance is not merelya transportation modality, but also a means of providing early diagnosis and treatment.
Assessment of Nurses' Practices Toward Infection Control Standardized Precautions in Azady Teaching Hospital in the City of Kirkuk
Authors: Mahmud Nazar , Abdul Sahib Sanaa
Published: September 2023

Objective: The aim of the present study is to assess the practices of nurses towards standard precautions at AzadyTeaching Hospital in the City of Kirkuk.Methodology: A descriptive study, which uses the assessment approach and it was conducted on nurses from January18th, 2009 to September 30th, 2009, using non-probability sampling a purposive sample of (37) subject (male andfemale nurses) who worked at surgical wards in Azady Teaching Hospital in Kirkuk city was selected. Two studyinstruments were utilized for proper data collection [questionnaire and observational checklist]; a questionnaire wasdeveloped for the purpose of the study. It was comprised of two parts which included the nurses' demographiccharacteristics and Information related to the setting of the sample (surgical wards). A pilot study was carried out forthe period of January 18th, 2009, to February 2nd, 2009 to determine the observaƟonal checklist reliability throughthe use of (Inter–rater). A panel of (19) experts was involved in the determinaƟon of the observaƟonal checklistcontent validity. Data were analyzed through the application of descriptive statistical data analysis approach(frequency, percentage, mean of scores and standard deviation), and inferential data analysis approach (chi-square).Results: The study findings revealed that the majority (91.9%) of the nurses did not get training sessions regardinginfecƟon control and (83.4%) of them had not parƟcipated conƟnuous learning about infecƟon control. According tothe level of practices towards standard precautions, it has revealed that poor practices of standard precautions bysurgical wards nurses had shown in surgical wards.Recommendations: The study recommended that special education programs can be designed and presented to thesurgical ward nurses and to all the hospital staff in order to increase their awareness towards infection.
Assessment of students' knowledge regarding breast self-examination in Erbil City-Iraq
Authors: Azez Kareem , Sheren Nazar
Published: September 2023

Breast cancer is the most common cause of death among women worldwide (1). Breast self-exam (BSE) is consideredan important public health procedure; primary prevention should be given the highest priority in the fight againstcancer.Cancer is considered the second leading cause of death in developed countries there was some 6.2 million cancerrelated deaths, accounƟng for 12% of all deaths globally (5).Patients perception toward this disease and preferenceconcerning the types and aims of their treatment are vary they may loss hopes and become devastated and crippledor even dies earlier, if told about the diagnosis (13). The study aimed to assess knowledge of female students regardingBSE, and to find out relationship between sociodemographic variables and breast self-exam.One hundred of female students from, Medical technical institute in the first and second class were selected toparticipate in the study. The questionnaire was designed for data collection. The data were collection from January 1st,2010 to March 20th, 2010.The questionnaire it consists of two parts related to sociodemoraphic characteristics for study sample, and femalestudent's knowledge about breast self exam. The study revealed that female student's knowledge about breast selfexamwas reported poorly, and there were no significant differences among study sample about. The study revealedthat female students' knowledge about breast self-exam was reported poorly according to their age, marital status,and economic status.The study recommended to emphasizing to curriculum of Medical Technical Institute and should be included breastcancer knowledge and prevention, and Implementation of health education program for female students to raisebreast cancer knowledge and awareness among female students
Study of some risk factors and C - reactive protein levels among patients with cardiovascular diseases
Authors: Al-Rubayie Yaqoub , Dawood Dawood , Alwan Adnan
Published: September 2023

Objective : To study the effect of some risk factors like age, smoking and Diabetes mellitus (DM) among patients withcertain cardiovascular diseases (Angina pectoris and Myocardial infarction), in addition to the assessment of the Creactiveprotein (CRP) in the sera of those patients.Methodology: The study was carried out on (100) subjects who were hospitalized in the Iraqi Center of heart Diseasesin Baghdad city and were suffering from Myocardial InfarcƟon (MI) (16) and Angina Pectoris (AP) (79) or from both (5)over a period from September 2009 to June 2010. The results of paƟents were compared with those of (30) healthyand age-matched individuals as a control group. Data were obtained from patients who were already diagnosed byspecialists through the use of questionnaire forms including information about age, gender and smoking. Venousblood samples were collected from both the patients and control group to estimate the levels of blood glucose and Creactiveprotein.Results: StaƟsƟcal results showed that the majority of angina paƟents were males within the age group (51-60) yearswith significant differences between males and females. The study also demonstrated that the incidence of (MI) and(AP) was higher among non-smokers in comparison with smokers. The study indicated that the majority of patientswith (MI) and (AP) were diabetic. Finally, the study showed that the levels of C-reactive protein among (MI) and (AP)patients were higher than its level among the control group with a highly significant difference.Recommendations: A large size of sample is recommended to be studied to confirm the results of this study. Study ofother factors such as hypertension, body mass index and lipid profile may be of value.
Quality of Life among Adult Patients with Peptic Ulcer in the City of Sulaimani
Authors: Mussa Yasin , Mohammad Mohammed , Abdulsahib Sanaa
Published: September 2023

Objectives: To assess the quality of life for adult patients with peptic ulcers in the city of Sulaimani.Methodology: A descriptive study, using the assessment approach was conducted on patients with peptic ulcerdisease from January 12th, 2009 to September 30th, 2009. A purposive "non-probability" sample of (100) paƟents(males and females) with peptic ulcers who attended Kurdistan Center for Gastroenterology and Hepatology wereselected for the study. A questionnaire was adapted from the World Health Organization quality of life questionnaire(1998) for the purpose of the study. It is comprised of (3) parts that included sociodemographic characteristics form,medical history form and adult peptic ulcers patients' quality of life (QoL) questionnaire. A pilot study was carried outon (10) paƟents for the period of January 12th through January 28th, 2009 to determine the study quesƟonnaire'sreliability through the use of stability (test-retest method). A panel of (14) experts was involved in the determinationof the questionnaire's content validity. Data were analyzed through the application of the descriptive statistical dataanalysis approach (frequency, percentage, mean of scores) and inferential statistical data analysis approach (Pearsoncorrelation coefficient and chi-square).Results: The findings of the study indicated that quality of life was affected in physical domain and that age, gender,marital status, and monthly income had significant relationship with quality of life domains.Recommendations: The study recommends that young adults, particularly Individuals with blood group (O) should behighly aware from gastrointestinal (GI) symptoms and avoids risk factors for the development of peptic ulcer disease(PUD). Also, the study recommends providing health assurance and conducting further multi centers studies in orderto demonstrate the differences in QoL issues for PUD patients.
Assessment of mothers' practices toward children with steroid – sensitive nephrotic syndrome at pediatrics hospitals in Baghdad city
Authors: Zyarah Feryal , Mua’ala Iqbal
Published: September 2023

Objective(s): To assess mothers' practices toward children with steroid – sensitive Nephrotic Syndrome (SSNS) whoare visiting nephrology consultation units, and to find out the relationships between their practices and thedemographical data for mother and child.Methodology: A descriptive study was carried out at nephrology consultation units of Baghdad pediatrics hospitals(Child's Central Pediatric Teaching Hospital, Al-kadimiyia Teaching Hospital, and Welfare Teaching Hospital) startedfrom February 18th to the end of July 2009. A purposive sample of (80) mothers who company their children wereselected. The data were collected through a constructed questionnaire, with two parts; the first part is concerned withmother's and child's demographical characteristic, the second part is concerned with mothers' practices aboutsteroid– sensitive nephrotic syndrome. An interview method was used to full questionnaire format. The validity wasdetermined through a panel of experts. While, the reliability was determined through a pilot study. The data wereanalyzed by using descriptive and inferential statistical measures by using the statistical package of social science(SPSS) version (15).Results: The findings of the study showed that mothers have poor practices (61.3%). The study results revealed thatthere is a significant association between mothers' practices and their educational level, and duration of the child'sdisease. While mother's age, occupation, child's age, child's sex, child's age at onset (years), child's previous diseaseand heredity have no association with their practices.Recommendations: The study recommends that health education for mothers would improve their practices.
Effect of metal wire and glass fibers on the impact strength of acrylic denture-base resin
Authors: Jaber Makarem
Published: September 2023

Objective(s): The aim of this study is to compare the impact strength of a heat cured denture-base acrylic resinreinforced with metal wire and glass fibers.

Methodology: Forty five specimens were prepared from pink heat cure acrylic resin. Specimens were grouped into;group-I (control group) which consists of 15 specimens with no reinforcement, group-II which consists of 15 specimensreinforced with metal wire, and group-III consists of 15 specimens reinforced with glass fibers. Specimens were testedby using charpy impact machine.

Results: The result showed that there was a highly significant difference in impact strength value among the testinggroups at (P < 0.001).

Conclusion: The impact strength of heat polymerized denture-base resin was enhanced considerably by using metalwire and glass fibers reinforcements. However, the addition of glass fibers was significantly more effective method toimprove impact strength of denture base acrylic resin.
A importância do controller nas organizações
Authors: Poveda Júlia Jacob , Costa Juan de França Magalhães
Published: September 2023

Para alcançar os resultados e a eficiência, os responsáveis pela organização tomam as decisões fundamentadas em dados concretos. Com isso a controladoria tem a obrigação de entregar informações atualizadas, com projeções futuras e de fácil compreensão. Este trabalho é entregue pelas contribuições que o controller apresenta à gestão empresarial, pois com sua aplicação, os administradores serão capazes de obter informações fidedignas, dados precisos e confiáveis que dão maior suporte nas tomadas de decisões. O objetivo geral deste artigo é apresentar a importância do controller na tomada de decisão para melhora no processo da gestão empresarial. Foi elaborada uma pesquisa bibliográfica, com intuito de mencionar os conceitos e definições. É destacado na pesquisa, as várias contribuições que o controller pode proporcionar a organização, desde que seja de forma adequada e sempre dando maior suporte nas suas tomadas de decisões.
O papel da liderança na retenção e desenvolvimento de talentos
Authors: Stetele Lorena Goulart Amaral , Dutra Profa. Dra. Tatiana Almendra
Published: September 2023

A gestão de talentos é um tema cada vez mais relevante para as organizações, hoje as pessoas são vistas como seu principal recurso e responsáveis por seu diferencial competitivo, com isso se acentua a necessidade de valorizar os funcionários que possuem características diferenciadas e podem contribuir para que as empresas alcancem seus objetivos. Apesar das inúmeras bibliografias sobre o tema, ainda é possível verificar muita divergência sobre o entendimento do papel do líder nesse processo. Esse trabalho teve como objetivo analisar do papel do líder no desenvolvimento e retenção de talentos. Foi realizado um estudo de caso em uma empresa onde atualmente o tema está em evolução. Com o estudo foi possível verificar que o entendimento sobre o papel do líder na retenção e desenvolvimento de talentos é muito amplo, trazendo diversas definições tanto no referencial teórico como nas entrevistas.
DEMOGRAPHIC FACTORS ASSOCIATED WITH NON-COMPLETION AMONG POSTGRADUATE STUDENT IN SELECTED PUBLIC UNIVERSITIES IN KENYA
Authors: Mwende Mugendi Sophia , Githae Eunice
Published: September 2023

Non-completion among university students is a common phenomenon in many parts of the world. Many causes of this problem have been advanced and among them are institutional and individual reasons like financial ability, gender and motivation to complete studies. Psychological distress though not investigated thoroughly has been cited as one of the problems leading to non-completion. The purpose of this study was to establish the relationship between psychological distress and non-completion among postgraduate students in selected public universities in Kenya. Weiner Attribution theory (1985) informed the study. The study adopted a correlation research design and it was conducted in two selected public universities in Uasin Gishu and Nairobi counties targeting a population of 945 postgraduate students. A sample of (N=273) was obtained from the two selected public universities through systematic random sampling. The study used questionnaires, focus group discussions and document analysis in collecting data. Reliability of the questionnaire was established using Split half method from a pilot study conducted in Uasin Gishu County. Statistical package for the social sciences SPSS 23 was also used to analyze the data .Descriptive statistics to analyze demographic data while Pearson correlation was employed to test the relationship between psychological distress and non-completion. Regression analysis was used to clarify the nature of relationship with the variable. Findings indicated a weak negative correlation between psychological distress and non-completion, not statistically significant, rs (229) =-.063, p ˃ .05. However, descriptive findings established that a majority of students 34.1% agreed that psychological distress could lead to non-completion. It recommended that students plan for their study schedules and finances to ensure study period is not interrupted by roles that can be put on hold like parenting and inadequate finances. Further the university administration should put in place / reinforce committees that handle non-completion among students. Development and implementation of postgraduate policy that would track postgraduate journey, as well as establishment of course advisory, guidance and counselling for this students.
TEAHING CHILDREN WITH AUTISM SPETRUM DISORDERS NOSE BLOWING
Authors: Gajić Anja , Arsić Bojana , Bašić Aleksandra , Maćešić-Petrović Dragana
Published: September 2023

The impairments that are present in children with autism spectrum disorders (ASD) may lead to deficits in the development of daily activities, such as personal care and personal hygiene skills that are essential for independence. We used shaping procedure to teach three children with ASD nose blowing skills and this is the first ever research addressing this procedure application in children with ASD. We divided the skill into five steps and we used modeling prompt. All three participants mastered the nose blowing skill in 17 or 21 sessions. The first participant had the most difficulty with steps three and five, because of the transition from exhaling through the mouth to forceful exhaling from the nose. Shaping procedure was proven to be a successful as a teaching tool with children with ASD. These results are significant because the participants will be able to use the acquired skill every day and it will prevent possible future health issues. We believe it is necessary that both special educators and parents or caregivers of children with ASD implement personal hygiene teaching procedures in school or home environments.
Pengaruh Keselamatan dan Kesehatan Kerja Terhadap Produktivitas Kerja Karyawan pada Peternakan Delvina Sukorejo Pasuruan
Authors: Ratnasari Ike , Afif Muhammad , Novita Silviana
Published: September 2023

Latar belakang penelitian ini adalah untuk mengetahui pengaruh simultan dan parsial keselamatan dan kesehatan kerja terhadap produktivitas kerja karyawan di Delvina Sukorejo Farm. Penelitian ini merupakan penelitian tipe kuantitatif. Populasi dalam penelitian ini adalah 83 karyawan Ternak Delvina Sukorejo. Sampel penelitian terdiri dari 83 responden yang diperoleh dari rumus slovin dengan menggunakan teknik incidental sampling yaitu teknik penentuan sampel berdasarkan chance. Teknik analisis data yang digunakan adalah uji validitas dan reliabilitas, uji asumsi klasik (uji normalitas, multikolinearitas, heteroskedastisitas, analisis regresi linier berganda, uji koefisien determinasi R2, uji F (simultan), uji t (parsial). Hasil penelitian ini menunjukkan bahwa safety style berpengaruh positif secara parsial dan signifikan terhadap produktivitas kerja karyawan Peternakan Delvina Sukorejo. Kesehatan kerja berpengaruh positif dan signifikan terhadap produktivitas karyawan di Delvina Sukorejo Farm. Secara bersamaan keselamatan dan kesehatan kerja berpengaruh positif dan signifikan terhadap produktivitas kerja di Delvina Sukorejo Farm. Berdasarkan hasil penelitian, terdapat pengaruh yang paling dominan terhadap produktivitas kerja karyawan di Peternakan Delvina Sukorejo, yaitu kesehatan kerja
Perceptions Regarding
Authors: Papajorgji Petraq
Published: September 2023

Before the COVID-19 crisis, it could be said that the Distance Learning approach played a supporting role; it has now assumed a central rule, and, inhuman relations terms, the faculty and the students are getting ‘on the job training.’ During these pandemic times of COVID-19, institutions of higher education had to close their doors, to stop in-person teacher. In to keep educating, these institutions chose to use DL, and to continue educating.Most higher education institutions had not previously mastered the intricacies of DL, even though the COVID-19 crisis forces the paradigm shift with unexpected speed.The goal of the study is to understand what students and professors think about this approach, to have a feeling of the kinds of problems that are to be addressed so that the efficiency and the interactivity of the traditional teaching process are not negatively impacted. Four topics that could present an interesting ‘story’ about DL became the pillars of the study; effectiveness, interactivity, feasibility and the future of DL, respectively.
La cultura digital como factor de incidencia de la ciberdelincuencia
Authors: Balbin Linares Patricia Stefany , Ludeña González Gerardo Francisco , Cueva Quezada Nilton Isaias , Osco Escobedo Miguel Angel
Published: September 2023

La cibedelincuencia ha registrado durante los últimos años un alto índice de daños a personas naturales como jurídicas en sus diferentes modalidades, siendo la falta de cultura digital el factor por el cual los ciberdelincuentes se valen para perpetrar sus ilícitos, el objetivo de la investigación fue identificar los factores que propician el accionar cibercriminal por la falta de cultura digital entendiéndose como tal las prácticas, costumbres y formas comunicación social que se realizan mediante el empleo de las tecnologías de la información y la comunicación y el Internet. Metodología se efectuó la metodología de revisión sistemática a través de la revisión teórica de fuentes secundarias, disponible en la base de datos Scopus, Ebscohost, Dialnet, Scielo y Redalyc. Se utilizó la búsqueda y revisión de producción científica filtrando los términos de: “cultura digital” y “ciberdelincuencia”. Los resultados refieren que la comunicación digital transforma la cultura y la producción, pero los ciberdelitos requieren medidas preventivas internacionales. Los jóvenes son los principales usuarios de las TIC y las redes sociales pueden promover contravalores. La falta de definición de la ciberdelincuencia dificulta su prevención. La transformación digital afecta nuestra forma de vida y se necesita más investigación sobre problemas sociales relacionados con las TIC. Medidas de prevención individualizadas pueden evitar delitos cibernéticos. Se concluye la importancia para las personas de cultivar una conciencia de seguridad en el buen empleo y manejo de las TIC e Internet, estableciéndose una cultura digital con medidas acertadas para precaver la incidencia de la ciberdelincuencia.
El abuso del derecho penal y la desproporcionalidad de la prisión preventiva en el personal judicial
Authors: Cabrera Abdel Arauco , Ludeña González Gerardo Francisco , Cueva Quezada Nilton Isaias
Published: September 2023

El presente artículo de revisión bibliográfica tuvo el objetivo de analizar el abuso del derecho penal y la desproporcionalidad de la prisión preventiva en el personal judicial. El método de la investigación ha sido producto de una revisión documental, sobre una problemática de actualidad relacionada con el derecho penal y la prisión preventiva, esta controversia involucra la libertad del ciudadano como parte del derecho fundamental y la inadecuada proporcionalidad de la medida para que se dicte dicha privación de la libertad. La información fue a partir de lo recolectado en las bases de datos Scopus, Scielo y páginas de internet muy relevantes para la investigación. Los resultados muestran que existe incidencia del abuso del derecho penal en la desproporcionalidad de la prisión preventiva del personal judicial. Se concluye que se cometió el abuso por parte del personal judicial en contra de los investigados. Conclusiones el código penal de cada país debe ser elaborado de manera explícita, garantizando el principio de proporcionalidad en casos de prisión preventiva. Además, es importante que los códigos penales sean susceptibles de ser modificados para especificar de manera clara las medidas cautelares a fin de evitar el abuso de la prisión preventiva.
Effect Of Build Direction On The Tensile Properties Of A Ti6Al4V Alloy Manufactured Using Selective Laser Melting
Authors: Nkosi Nompumelelo , Sacks Natasha
Published: September 2023

In this study the effect of build direction on the tensile properties of a Ti6Al4V alloy produced by selective laser melting was investigated. Initial cubes were printed using three different scanning patterns, namely island, meander and bi-directional alternating and rotated at 67⁰, to determine the optimum pattern producing the highest density and hardness. From the initial results all three patterns produced similar densities of >99%, while the meander pattern had the highest average hardness. Tensile test samples were printed in the vertical and horizontal directions in terms of the gauge length respectively, using the three scanning patterns and the ultimate tensile strength, % elongation and Young’s modulus was determined. The microstructure of the samples was studied using scanning electron microscopy, x-ray diffraction and computerized tomography. The tensile samples printed in the horizontal direction generally had better strength properties.
Additive Manufacturing Integrated Technologies Applied to Human Machine Interfaces: An Industry 5.0 Overview
Authors: Rahmani Ramin , Karimi Javad , Davoodi Farideh , Abrantes João , Resende Pedro , Lopes Sérgio
Published: September 2023

The industry 5.0 revolution prioritizes digital transformation and automation, while also focusing on improving human-machine interface (HMI), improving production and reducing work-related injuries. On the other hand, to tackle the challenge of designing lightweight and complicated structures, new high-tech materials have been developed using combined additive manufacturing (AM) and powder metallurgy (PM) techniques. The futuristic subsections of additive manufacturing (AM) produce composite materials that incorporate both metallic and ceramic components, suitable for a range of applications from art to industrial use. This brief overview examines the key features of the fifth industrial revolution, with particular attention to the selective laser melting (SLM) process. Two specific areas of study include the exploration of an antiviral metal-ceramic composite and also reflective metal fabrication using integrated AM-PM technologies.
Primary And Secondary Breakup Of Molten Ti64 In An EIGA Atomizer For Metal Powder Production
Authors: Qaddah Baraa , Chapelle Pierre , Bellot Jean Pierre , Jourdan Julien , Rimbert Nicolas , Deborde Agathe , Hammes Raphael
Published: September 2023

Gas atomization is the predominant method of powder production for metal additive manufacturing. The EIGA atomizer (Electrode Induction melting Gas Atomization) is a free-fall process used to produce spherical powders, particularly for refractory and high-purity metals such as the titanium alloy Ti-6Al-4V (Ti64). In this process, a swirling supersonic gas jet hits a molten metal stream atomizing it into small droplets through various fragmentation mechanisms. To identify the different fragmentation mechanisms of molten Ti64 within the process, a visualization of the metal atomization by a high-speed video camera is performed in an EIGA tower. The role of the atomization gas pressure on the fragmentation mechanisms and on the final particle size distribution is determined. The mechanisms observed are fiber breakup, bag breakup and Rayleigh breakup for primary fragmentation and bag breakup and shear breakup for secondary fragmentation. Key words: Free-fall atomizer; swirling supersonic gas flow; metal powder; primary fragmentation; secondary fragmentation; high-speed camera.
Material and Process Hybridisation for Implant Materials - Laser Powder Bed Fusion (LPBF) of Titanium Powders on In-mould Labelled Metallic Nonwovens in Injection Moulded Zirconia (CIM) Substrates
Authors: Günther Anne , Stelzer Sebastian , Mannschatz Anne , Dudeck Anna , Tassilo Moritz
Published: September 2023

The research aims not only at the hybridisation of metal and ceramic structures via an innovative textile interface, but also at the hybridisation of conventional and additive powder technologies. In this way, multifunctional components with a geometric complexity are producible. One focus is on powder injection moulding in combination with in-mould labelling and Laser Powder Bed Fusion (LPBF). Composite components are bonded to each other by means of a metallic textile nonwoven. Due to the inherent properties of the nonwoven, like non-directional structure of thin fibres and isotropic compressibility, it can partially embedded in the ceramic substrate and sintered without damaging the composite due to the different coefficients of thermal expansion (CTE) and shrinkage behaviour of ceramics and metals. For applications in implantology, in this case zirconia is bonded with titanium via LPBF by using a steel nonwoven to create the bond between the two materials and at the same time act damage tolerant.