453 research outputs found
Internet and Users. Who is the Reader?
Internet has turned into a fundamental component of everyday life, as it plays a major role in
advancing the globalization process. Globalization was fostered by the idea of creating equalaccess
opportunities for all and facilitating communication worldwide. Using internet as the core
platform, billions of people try to access and benefit from this opportunity through search
engines, service providers, websites and social media. However, given the profound difference
between internet and user’s languages, users end up on relying on search engines and tools to
translate their ideas into a computer-readable language and derive information from them.
In order to provide the best possible services, search engines and social media need to
accumulate comprehensive data on each user’s identity. The challenge is that once they are fed
with convenient information on each user, they tend to personalize the idea they grasp of him or
her based on their given regulations and policies, which in the mid- and long-term results in
managing users’ access to information..
By applying the reader-response theory, this paper seeks to focus on the challenges stemming
from the adoption of users’ personalized profiles by Google, Facebook and Amazon as the most
common part of users’ performance in internet. It also explores how the reading differences of
the users and the tools result not only in personalized versions of users, but also engender an
unrecognized virtual in-betweenness of users’ own perception of themselves and the tools’
perception of users
Infrastructure of Synchrotronic Biosensor Based on Semiconductor Device Fabrication for Tracking, Monitoring, Imaging, Measuring, Diagnosing and Detecting Cancer Cells
Copper Zinc Antimony Sulfide (CZAS) is derived from Copper AntimonySulfide (CAS), a famatinite class of compound. In the current paper, thefirst step for using Copper, Zinc, Antimony and Sulfide as materials inmanufacturing synchrotronic biosensor-namely increasing the sensitivity of biosensor through creating Copper Zinc Antimony Sulfide, CZAS(Cu1.18Zn0.40Sb1.90S7.2) semiconductor and using it instead of CopperTin Sulfide, CTS (Cu2SnS3) for tracking, monitoring, imaging, measuring,diagnosing and detecting cancer cells, is evaluated. Further, optimization oftris(2,2'-bipyridyl)ruthenium(II)(Ru(bpy)32+) concentrations and CopperZinc Antimony Sulfide, CZAS (Cu1.18Zn0.40Sb1.90S7.2) semiconductor as two main and effective materials in the intensity of synchrotron fortracking, monitoring, imaging, measuring, diagnosing and detecting cancercells are considered so that the highest sensitivity obtains. In this regard,various concentrations of two materials were prepared and photon emissionwas investigated in the absence of cancer cells. On the other hand, ccancerdiagnosis requires the analysis of images and attributes as well as collectingmany clinical and mammography variables. In diagnosis of cancer, it isimportant to determine whether a tumor is benign or malignant. The information about cancer risk prediction along with the type of tumor are crucialfor patients and effective medical decision making. An ideal diagnosticsystem could effectively distinguish between benign and malignant cells;however, such a system has not been created yet. In this study, a model isdeveloped to improve the prediction probability of cancer. It is necessary tohave such a prediction model as the survival probability of cancer is highwhen patients are diagnosed at early stages
Cyclone Bomb Hits Southern Brazil in 2020
An “explosive extratropical cyclone” is an atmospheric phenomenon that occurs when there is a very rapid drop in central atmospheric pressure. This phenomenon, with its characteristic of rapidly lowering the pressure in its interior, generates very intense winds and for this reason it is called explosive cyclone, bomb cyclone. With gusts recorded of 116 km/h, atmospheric phenomenon - “cyclone bomb” (CB) hit southern Brazil on June 30, the beginning of winter 2020, causing destruction in its influence over. One of the cities most affected was Chapecó, west of the state of Santa Catarina. The satellite images show that the CB generated a low pressure (976 mbar) inside it, generating two atmospheric currents that moved at high speed. In a northwest-southeast direction, Bolivia and Paraguay, crossing the states of Parana and Santa Catarina, and this draft that hit the south of Brazil, which caused the destruction of the affected states. Another moving to Argentina, southwest-northeast direction, due to high area of high pressure (1022 mbar). Both enhanced the phenomenon
Analytical and Numerical Investigation of Soliton Solutions of Coupled Equations in Quadratic Media: A Novel Approach
Solitons have been hitherto studied in Kerr media. However, we show that the optical solitons are not only limited to non-linear Kerr media. In this paper, a new method is devised to achieve the analytical approximate solutions to the soliton packages in one and two dimensions. Inputting (1) and (2) to Maxwell equations and using second-harmonic generation of type I, the coupled motion equations are obtained. Some states of spatial bright solitons are studied for large values of . The variational method is briefly reviewed and analytical approximate solution to quadratic-soliton coupled motion equations is investigated in one and two dimensions and also numerically solved. The comparison of analytical and numerical results indicates that our method is more accurate than the variational method.Key words Bright and dark solitons; Spatial optical soliton; Quadratic Kerr media; Variational method; Secondharmonic generatio
The Relationship between Mothers' Parenting Stress and Spiritual Well-Being and the Behavioral Disorders of Children with Specific Learning Disorders: Mediated by the Quality of Married Life
AbstractIntroduction: Raising children with specific learning disorders (SLDs) is a stressful experience, and one type of stress experienced by the mothers of these children is parenting stress. The present study aimed to investigate the relationship between mothers' parenting stress and spiritual well-being and the behavioral disorders of children with SLDs through the mediating role of quality of married life.Methods: The statistical population of this descriptive-correlational study consisted of all the mothers of children with specific learning disorders (SLDs) in Shiraz (Iran) in 2022. A sample of 218 boys with SLDs and their mothers was conveniently selected. The Parenting Stress Index, the Spiritual Well-Being Scale, the Revised Dyadic Adjustment Scale, and the Child Behavior Checklist were used for data collection. The proposed model was evaluated using structural equation modeling (SEM) in SPSS and AMOS.Results: All the direct paths, except for the path of parenting stress to children's behavioral disorders, were significant (P<0.001). The indirect paths from parenting stress to children's behavioral disorders, mediated by the quality of married life, and the path from spiritual well-being to children's behavioral disorders, mediated by the quality of married life, were also significant (P<0.001).Conclusions: Based on the results, the adjusted final model had an optimal fit and constitutes a major step towards identifying the factors affecting the behavioral disorders of children with SLDs
Emerging H9N2 Avian Influenza virus research at the human and animal interface
Most emerging diseases are of zoonotic origin. Globalization and intensive animal farming has led to an increased spread of zoonotic infections and it is therefore of crucial importance to be prepared in managing potential outbreaks. Influenza type A virus is cause of a zoonotic disease, which can affect animal and human health. A number of influenza virus subtypes have successfully crossed the species barrier and have established in mammal and human populations, causing yearly seasonal epidemics. The influenza A viruses of the H9N2 subtype are classified as low pathogenic avian influenza (AI) viruses which infect mostly avian species. The H9N2 type has caused infections both in wild birds and in the poultry population around the globe, including several countries in Asia, Europe, North Africa and Americas since the mid-1990s. The wide circulation of H9N2 viruses throughout Eurasia, along with their ability to cause direct infection in mammals and humans, raises public health concern about their potential to become candidates for the next influenza pandemic.
This Ph.D. thesis deals with phylogenetic and Bayesian phylogeographic analyses, genetic nomenclature and molecular evolutionary dynamics to elucidate the different aspects of H9 subtypes circulating worldwide. Focusing on the hemagglutinin gene through the application of bioinformatics tools a large amount of H9 subtype strains global data have been analysed and a unified nomenclature system have been designed producing a lot of data that contributed to clarify the evolution dynamics of H9 subtype viruses identified to date.
The evolutionary dynamics of H9N2 in an endemic country as Iran have been elaborated in further detail. Phylogenetic and molecular studies have been performed on all the H9N2 Iranian viruses circulating from 1998 to 2015 along with other neighboring countries to identify the phylogenetic relationships grouping the various introductions and the spread to other countries, in order to highlight the evolution dynamics and the extent of its molecular change since the H9N2 first detection in Iran and after the application of a vaccination program.
In addition, one of the research topics includes a serological investigation of H9N2 avian influenza virus among the poultry workers in an endemic country as Iran where, despite of the control measures implemented at national level including mass vaccination of poultry, the subtype H9N2 has rapidly spread and can be considered endemic in Iranian poultry. This study has been carried in collaboration with an Iranian research group to reveal the association between professional exposure to poultry and the presence of antibodies to H9N2 viruses in order to develop surveillance and control programs to monitor the biological risk and thus to preserve public health against the spreading of the H9N2 virus
Synthesis and study the analgesic and anti-inflammatory effects of rigid benzofurane 3, 4 dihydroxy chalcon (DHC) in mice
Schwann Cell-Mediated Preservation of Vision in Retinal Degenerative Diseases via the Reduction of Oxidative Stress: A Possible Mechanism
After central nervous system (CNS) injuries, the regeneration process does not work out well except for remyelination process. This remyelination capacity in CNS can be mentioned as a worthy example of stem/precursor cell-mediated renewal process. Remyelination in CNS is mediated by Schwann cells which act mainly as remyelinating agents in peripheral nervous system (PNS) but several studies have shown their potential role in CNS too. Schwann cells have the capacity of supporting and saving retinal cells by secreting growth factors like: Ă‚Â Brain-derived neurotrophic factor (BDNF), Glial cell-derived neurotrophic factor (GDNF), and Basic fibroblast growth factor (bFGF) in subretinal space. Retinal degenerative diseases are one of the most important debilitating concerns in modern countries which has encountered the problem of ageing population. One of the best examples of retinal degenerative disease which is a leading cause of permanent visual loss in Western world is age related macular degeneration (AMD). In United States it is believed that nearly 1.75 million, older than 40 years have end stages of this debilitating disease, and it is estimated that this number will progress to approximately 3 million people by year 2020. One of the most common pathways which is involved in initiation and development of retinal disease is called Oxidative stress. Schwann cells are capable of secreting high amounts of antioxidant enzymes which protect PNS in front of oxidative stress which is result of glucose fluctuation in diabetic patients. The antioxidant role of Schwann cells in PNS may be the possible mechanism which can make Schwann cells potent reconstructing agents in CNS and especially in retinal injuries and retinal degenerative disease
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