Use Of Laptops Research Articles

Association between estimated whole-brain radiofrequency electromagnetic fields dose and cognitive function in preadolescents and adolescents.

To investigate the association between estimated whole-brain radiofrequency electromagnetic fields (RF-EMF) dose, using an improved integrated RF-EMF exposure model, and cognitive function in preadolescents and adolescents. Cross-sectional analysis in preadolescents aged 9-11 years and adolescents aged 17-18 years from the Dutch Amsterdam Born Children and their Development Study (n=1664 preadolescents) and the Spanish INfancia y Medio Ambiente Project (n=1288 preadolescents and n=261 adolescents), two population-based birth cohort studies. Overall whole-brain RF-EMF doses (mJ/kg/day) were estimated for several RF-EMF sources together including mobile and Digital Enhanced Cordless Telecommunications phone calls (named phone calls), other mobile phone uses than calling, tablet use, laptop use (named screen activities), and far-field sources. We also estimated whole-brain RF-EMF doses in these three groups separately (i.e. phone calls, screen activities, and far-field) that lead to different patterns of RF-EMF exposure. We assessed non-verbal intelligence in the Dutch and Spanish preadolescents, information processing speed, attentional function, and cognitive flexibility in the Spanish preadolescents, and working memory and semantic fluency in the Spanish preadolescents and adolescents using validated neurocognitive tests. Estimated overall whole-brain RF-EMF dose was 90.1mJ/kg/day (interquartile range (IQR) 42.7; 164.0) in the Dutch and Spanish preadolescents and 105.1mJ/kg/day (IQR 51.0; 295.7) in the Spanish adolescents. Higher overall estimated whole-brain RF-EMF doses from all RF-EMF sources together and from phone calls were associated with lower non-verbal intelligence score in the Dutch and Spanish preadolescents (-0.10 points, 95% CI -0.19; -0.02 per 100mJ/kg/day increase in each exposure). However, none of the whole-brain RF-EMF doses was related to any other cognitive function outcome in the Spanish preadolescents or adolescents. Our results suggest that higher brain exposure to RF-EMF is related to lower non-verbal intelligence but not to other cognitive function outcomes. Given the cross-sectional nature of the study, the small effect sizes, and the unknown biological mechanisms, we cannot discard that our resultsare due to chance finding or reverse causality. Longitudinal studies on RF-EMF brain exposure and cognitive function are needed.

PELATIHAN PENULISAAN PENELITIAN TINDAKAN KELAS (PTK) PADA GURU SDN CIBITUNG KULON 01 BOGOR

Education has the core of the interaction between educators and students in helping students master educational goals. Educational interactions can take place in the family, school, and community environment, which will support students to develop their educational experience. Classroom action research is described as an effort to examine the learning activities of students by carrying out a planned action by the teacher and analyzing the effect of actions to improve and improve the quality of learning. The activity method used in community service activities is (1) lectures, used by the service team to convey the principles of classroom action research, classroom action research procedures, implementation of classroom action research, and procedures for writing classroom action research reports. The lecture was supported by the use of laptops and LCDs to display service materials for a limited time. (2) Demonstration, used by the service team in the hope that participants can start practicing problem formulation in the learning process that can be solved through classroom action research, class action research proposal design, to writing class action research reports. The conclusion of this community service, namely (1) the community service activities carried out by the Research Team for the Primary School Teacher Education Department with the lecture and demonstration method have been able to improve the understanding of teachers of SDN Cibitung Kulon 01 Bogor about classroom action research and it is hoped that the teacher can simultaneously write the report, (2) writing reports Classroom action research is expected as an effort to develop the profession and at the same time assist teachers in achieving the credit score required for promotion.

Role of Social Media and E-Commerce for Business Entrepreneurship

This paper is an attempt to study the role of social media and e-commerce for business entrepreneurship in modern times. Social media and e-commerce play significant role for development of business enterprises and also for its marketing and sustainable growth. Internet access is most popular in recent days intensifying the use of mobile phones, computers, and laptops leading to a high change in the growth of digital channels both in strength and volume. Social media and internet play an ever-growing role in the lives of consumers. Now consumers are spending more time on social media and internet surfing. Thus the visibility of any product is more available through social media or internet than traditional marketing techniques. Online marketing is flourishing due to social media, people nowadays spend their time on social media and that is great for marketing, there are millions of monthly active users for various sites in social media. Day by day growth of online marketing in the global platform is an evident that the business entrepreneurship is taking place with a high speed. E-commerce website is providing all the goods and services through online portals online today. The increasing number of ecommerce websites.

Factors associated with direct use of laptop on the lap among male university undergraduates in Southwestern Nigeria

Laptop use comes with potential reproductive health risks for men. This study assessed the knowledge of reproductive health hazards and factors associated with direct use of laptop on the lap among male undergraduates of the University of Ibadan, Nigeria. A cross-sectional study conducted among 444 male undergraduates using multi-stage sampling and data collected through a validated questionnaire. Mean age was 21.0 years ± 2.6. Knowledge and perception of reproductive health hazards associated with direct laptop use were fairly good but practice was high. The knowledge of reproductive health hazards associated with direct laptop use on the lap was not associated with use (p = 0.08) and factors influencing use include; influence by colleagues (67.6%), non-availability of laptop cooling pads (42.6%), high cost of cooling pads (39.9%), perception of convenience (41.7%). Interventions on laptop ergonomics awareness and provision of affordable laptop ergonomic products for university students are recommended.

Estimated whole-brain and lobe-specific radiofrequency electromagnetic fields doses and brain volumes in preadolescents

ObjectiveTo assess the association between estimated whole-brain and lobe-specific radiofrequency electromagnetic fields (RF-EMF) doses, using an improved integrated RF-EMF exposure model, and brain volumes in preadolescents at 9–12 years old. MethodsCross-sectional analysis in preadolescents aged 9–12 years from the Generation R Study, a population-based birth cohort set up in Rotterdam, The Netherlands (n = 2592). An integrated exposure model was used to estimate whole-brain and lobe-specific RF-EMF doses (mJ/kg/day) from different RF-EMF sources including mobile and Digital Enhanced Cordless Telecommunications (DECT) phone calls, other mobile phone uses than calling, tablet use, laptop use, and far-field sources. Whole-brain and lobe-specific RF-EMF doses were estimated for all RF-EMF sources together (i.e. overall) and for three groups of RF-EMF sources that lead to a different pattern of RF-EMF exposure. Information on brain volumes was extracted from magnetic resonance imaging scans. ResultsEstimated overall whole-brain RF-EMF dose was 84.3 mJ/kg/day. The highest overall lobe-specific dose was estimated in the temporal lobe (307.1 mJ/kg/day). Whole-brain and lobe-specific RF-EMF doses from all RF-EMF sources together, from mobile and DECT phone calls, and from far-field sources were not associated with global, cortical, or subcortical brain volumes. However, a higher whole-brain RF-EMF dose from mobile phone use for internet browsing, e-mailing, and text messaging, tablet use, and laptop use while wirelessly connected to the internet was associated with a smaller caudate volume. ConclusionsOur results suggest that estimated whole-brain and lobe-specific RF-EMF doses were not related to brain volumes in preadolescents at 9–12 years old. Screen activities with mobile communication devices while wirelessly connected to the internet lead to low RF-EMF dose to the brain and our observed association may thus rather reflect effects of social or individual factors related to these specific uses of mobile communication devices. However, we cannot discard residual confounding, chance finding, or reverse causality. Further studies on mobile communication devices and their potential negative associations with brain development are warranted, regardless whether associations are due to RF-EMF exposure or to other factors related to their use.

PC 사용자를 위한 인공지능 기반 거북목 경고 시스템 개발

In recent years, excessive use of laptop computers, tablets, smartphones, and other small portable digital devices has caused many side effects, including the FHP (Forward Head Posture) or the poking chin. It has been reported that FHP results in shoulder pain, neck ache, craniofacial pain, headache, or other adverse conditions. To prevent FHP, it is advised to consciously keep one’s head in an upright posture. This paper proposes a new FHP warning system, which can help a user maintain a good posture by signaling an alarm, when FHP is detected. The system consists of an FHP warning device, a measurement set, and a decision algorithm for FHP. Unlike previous studies and patents, the proposed system delivers the design that is comfortable for daily use (because it is not worn by a user) and highly accurate through the adaptation of an AI (Artificial Intelligence) algorithm. The warning device was created as a turtle doll, which neck and back is elongated and lighted by LEDs, respectively. The measurement set consists of a servo motor and two sensors that read the distances from the computer to the upper face and the chest with the angular displacement of the two parameters. To decide FHP, three popular AI algorithms that are relevant to the classification problem were considered and analyzed, namely the ANN (Artificial Neural Network), SVM (Support Vector Machine), and DT (Decision Tree). Measurement data were collected by 7 different users and 2 chairs with different heights for good posture and FHP scenarios. The test results of the trained algorithms yielded accuracy performances of 73.78%, 83.00%, and 86.26% for ANN, SVM, and DT, respectively. In this study, ANN’s poor performance due to various reasons (e.g., the small training sample size) was discussed. DT, which was suitable for a problem set of 0 or 1 discrete outputs, was selected for the FHP warning system.

On or off task: The negative influence of laptops on neighboring students’ learning depends on how they are used

Previous research indicates that students' classroom laptop use distracts their peers and negatively affects the learning of their neighbors. The purpose of this study was to determine whether the types of activities that laptop users undertake (i.e., on-task note-taking versus off-task Web browsing) differentially affect their neighbors' learning. Sixty-two participants listened to a lecture in a classroom setting while seated either in front of, to the left of, to the right of, or behind a laptop-using confederate who switched from taking notes on their computer to browsing the internet at specified points during the lecture. Participants performed better on post-lecture quiz questions that asked about material covered while the confederate was on task than those that asked about material covered while the confederate was off task. This effect was comparable regardless of where participants sat in relation to the confederate. Our results support previous evidence that students' laptop use distracts neighboring students and expands on prior literature by further demonstrating that the types of activities that laptop users engage in during lecture matters for all neighboring students’ comprehension of material.

Sosialisasi Strategi Mitigasi Petani terhadap Perubahan Iklim di Korong Sijangek Kanagarian Sungai Durian Kecamatan Patamuan Kabupaten Padang Pariaman.

Changes in global climate that changes the average global temperature increases. Increased greenhouse gas emissions in the atmosphere, specifically CO2, have trapped heat in the Earth's atmosphere. This has an impact on the global system that causes everything from unexpected rainfall to extreme heat waves. The earth has gone through a period of warming and which is associated with repeated changes. What is currently the main concern and carried out by researchers is the heating process which is carried out faster than previously done, and also the increases associated with increasing levels of human production. The method of service activities that are used, among others: Lecture The use of laptops and LCDs helps socialization participants more easily discuss socialization material, relatively more material and limited training time, Demonstrations. Demonstrations were carried out by the service team as a source in the hope that the training participants could be carried out in accordance with the instructions given by the nara sources.
 Keywords: Socialization. Mitigation. Climate change.

The Influence of Social Media on Students’ Academic Life in Higher Education: The Case of University for Development Studies, Tamale

In recent times the proliferation of Information and Communication Technology has facilitated social interaction among different groups of people. Besides, communication in different forms is now easy with the creation of social media platforms that enable large groups of people to have a common discussion on a common platform. Some students of higher educational institutions are addicted to the use of these social media sites and could be detrimental to their academic achievement if not used effectively. This study provides empirical evidence from the Wa Campus students of the University for Development Studies (Ghana) on their awareness, use and effects of use of social media on their academic life. Primary data were collected from 380 randomly selected students through the use of a questionnaire and the data were analysed using descriptive statistics. With the exception of 2go and Tumblr where 46.1% and 44.7% of the respondents respectively are aware of, almost 80% of the respondents are aware of all the social media sites identified. The results therefore, indicate high awareness of current social media sites among the students with all the respondents becoming aware of at least Facebook and WhatsApp. Average time spent on frequently used social media sites is 40 hours per week. The use of smartphones, tablets and laptops which are very mobile is responsible for the relative higher intensity of social media use. The results also point out that social media sites are used for entertainment, social networking with friends and families, as well as for academic purpose. It is concluded that there are mixed effects of social media use on students’ academic life. The University’s Students Representative Council in collaboration with top management should develop strategies of informing students on the negative use of social media in their life. Keywords: Social Media, Academic Life, Information Literacy, Tertiary Students DOI: 10.7176/RHSS/10-4-13 Publication date: February 29 th 2020

Cellular Phone and Laptop Radiation Effects on Subjective Complaints in Informatics Students

The increasing use of cell phones and laptops in today’s modern society has a negative impact on health; one such impact is on informatics students, who struggle with the use of cell phones and computers in their daily activities. This study aimed to determine the relationship between radiation exposure to cell phones and laptops with subjective complaints in the form of sleep quality, headache, dry eye syndrome (DES) and concentration disorders. The research is analytic observational and cross-sectional approaches. The study used simple random sampling to select 112 respondents, all of which were informatics students of Universitas Sebelas Maret (UNS). The Pearson correlation test results were obtained from cell phone and laptop radiation exposure with sleep quality (p <0.05; r = 0.192), headache (p <0.05; r = 0.510), dry eye syndrome (p <0.05; r = 0.1950) and disturbances concentration (p <0.05; r = 0.406).

Human factors related to the use of a personal computer: A case study.

The aim of this study was to determine and compare the ergonomic requirements in the use of desktop computers and laptops. For comparison, postures in the sagittal and transversal planes involved while performing a typing and editing task on a desktop and laptop computers were verified. Thus, a case study was conducted with a Brazilian male of medium height, who works around 20 hours per week in a computer. Nine spherical markers of 2.5 cm in diameter were joined up with duct tape on the right side of the participant and the positions adopted by the subject were analyzed in the use of a desktop and a laptop computer, through direct observation and filming, using the videography technique. It is concluded that the use of desktop computers has lesser biomechanical demands since it showed angles closer to a neutral position and consequently having a lower risk of musculoskeletal complaints.

Posture during the use of electronic devices in people with chronic neck pain: A 3D motion analysis project.

Non-neutral postures during computerised device use coupled with increased usage may increase the risk of neck pain. Greater knowledge of postures that individuals with neck pain adopt during computerised device use is warranted. To evaluate neck and upper limb posture while using a tablet, laptop and desktop computer (sitting and standing) in individuals with chronic neck pain. Differences in three-dimensional kinematic variables were assessed during four conditions: tablet, laptop, desktop computer (sitting and standing) in 22 individuals with chronic neck pain >3 months. Differences between kinematic variables were determined using one-way repeated measures ANOVA with Bonferroni post-hoc tests. Compared to the desktop (sitting), tablet and laptop use resulted in increased neck flexion (mean difference tablet - 14.42°, 95% CI - 19.88, -8.96, P < 0.001; laptop -7.19°, -12.08, -2.31, P = .020); upper trunk flexion (tablet -14.89°, -20.22, -9.56, P < 0.001; laptop -5.56°, -10.02, -1.09, P = .009) and tablet bilateral shoulder elevation (left 11.01 mm, 2.01, 20.04, P < .016; right 13.08 mm, 3.09, 23.11, P < .006). Tablet and laptop use resulted in greater neck flexion, bilateral shoulder elevation and upper trunk flexion compared to a standard desktop computer, suggesting individuals with chronic neck pain should be mindful of their posture when using these smaller devices. Future research should explore how differences in posture may influence neck pain.

SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN LAPTOP DAN KOMPUTER BERBASIS WEBSITE MENGGUNAKAN METODE ANALYTICAL HIERARCHY PROCESS DAN WEIGHTED PRODUCT

The development of science and technology is now increasingly advanced and increasing rapidly, the use of laptops in the present times that are needed for everyday needs. Many choices of laptops and computers available on the market make people difficult to make choices. People usually only consider prices without regard to specifications. Analytical Hierarchy Process method is one method to help the calculation of selection criteria and Weighted Product methods to facilitate the community in choosing laptops and computers by ranking. The way it works is that the user chooses the 5 criteria provided, namely price, processor, ram, hdd, vga after choosing according to needs, the 10 best laptop ranking will appear based on the user's selection.

Neck pain among undergraduate medical students in a premier institute of central India: A cross-sectional study of prevalence and associated factors.

Context:Competitive exams conducted for undergraduate and postgraduate medical courses in India are tough. The undergraduate course is additionally taxing to the students’ health. Lack of physical activity, the stress of studies, and universal adoption of different gadgets make the undergraduate medical students prone to develop musculoskeletal pain-related issues.Aims:This study aimed to evaluate the prevalence of neck pain and the associated factors including gadget use among undergraduate medical students of a premier medical college in central India.Settings and Design:All undergraduate medical students including the interns of our institute were enrolled for this cross-sectional study.Methods and Materials:A self-explanatory internet-based questionnaire prepared using Kobo Toolbox was circulated via WhatsApp and email by the class representative of each batch of students. The responses obtained were analyzed using Statistical Package for the Social Sciences (SPSS).Statistical Analysis Used:Proportions and means were calculated. Chi-square test and univariable logistic regression analysis were used.Results:Three hundred thirty-one valid responses out of 423 responses were analyzed. In total, 58.3% of 331 students suffered from neck pain within the last one year. Students in the 3rd and 4th year had 2.9 times higher odds of current neck pain in comparison to 1st-year students. History of neck pain before joining the course was associated with a higher risk of having current neck pain. Self-perceived aggravation of pain from gadget use had significantly higher odds of contributing to the current episode of neck pain.Conclusions:Neck pain is not uncommon among undergraduate medical students. History of previous neck pain including that during schooling makes a student prone for the current episode of pain. Academic stress, smartphone and laptop use tend to aggravate the pain in those who have neck pain.

Cellular Phone and Laptop Radiation Effects on Subjective Complaints in Informatics Students

The increasing use of cell phones and laptops in today’s modern society has a negative impact on health; one such impact is on informatics students, who struggle with the use of cell phones and computers in their daily activities. This study aimed to determine the relationship between radiation exposure to cell phones and laptops with subjective complaints in the form of sleep quality, headache, dry eye syndrome (DES) and concentration disorders. The research is analytic observational and cross-sectional approaches. The study used simple random sampling to select 112 respondents, all of which were informatics students of Universitas Sebelas Maret (UNS). The Pearson correlation test results were obtained from cell phone and laptop radiation exposure with sleep quality (p <0.05; r = 0.192), headache (p <0.05; r = 0.510), dry eye syndrome (p <0.05; r = 0.1950) and disturbances concentration (p <0.05; r = 0.406).

Does the Use of Mobile Phone Affect Male Fertility? A Mini-Review.

Presently, there is a rise in the use of mobile phones, laptops, and wireless internet technologies such as Wi-Fi and 5G routers/modems across the globe; these devices emit a considerable amount of electromagnetic radiation (EMR) which could interact with the male reproductive system either by thermal or nonthermal mechanisms. The aim of this review was to examine the effects of mobile phone use on male fertility. Related studies that reported on the effects of EMR from mobile phones on male fertility from 2003 to 2020 were evaluated. PubMed database was used. The Medical Subject Heading system was used to extract relevant research studies from PubMed. Based on the outcomes of both human and animal studies analyzed in this review, animal and human spermatozoa exposed to EMR emitted by mobile phones had reduced motility, structural anomalies, and increased oxidative stress due to overproduction of reactive oxygen species. Scrotal hyperthermia and increased oxidative stress might be the key mechanisms through which EMR affects male fertility. However, these negative effects appear to be associated with the duration of mobile phone use.

The role of printed and electroniс publications in development of vision disorders

Aim. To study whether the use of printed and electronic publications is associated with vision disorders.Materials and Methods. We interrogated 100 high school students and 355 university students using a questionnaire developed by the Research Institute of Hygiene and Surveillance on Child and Adolescent Health. Further, 179 university students were examined utilising the automated system for the physiological testing while 100 high school students were examined by a certified ophthalmologist.Results. Around the half of the students have self-evaluated their vision as reduced, without associating this with the use of electronic devices. Boys were more prone to underestimate their health (Pearson’s contingency coefficient C = 0.2, p &lt; 0.001). Eye fatigue was significantly associated with higher frequency of using electronic devices regardless of their type (C = 0.7 for desktop computers and laptops, 0.8 for electronic books and 0.6 for tablets (p = 0.001)) while headaches were specifically associated with increased laptop use (C = 0.5, p = 0.02). Self-assessed reduced vision correlated with higher frequency of tablet use (C = 0.2, p = 0.004). Moderate or high myopia were also associated with a higher frequency of using desktop computer or laptop (C = 0.75, p = 0.001). The average time of work on a computer reached 2 and 3 hours on schooldays and on the weekend, respectively, in high school students. These numbers were significantly higher in university students (2.6 and 4.4 hours respectively for desktop computer and 2.9/3.7 hours for laptop). Functional vision loss was detected in 67.2% of high school students and 19% of university students while moderate or high myopia was diagnosed in 8.2% of high school students and 53.6% of university students. Mean visual acuity was 0.61 ± 0.25 (OD) and 0.64 ± 0.25 (OS).Conclusions. Safety indicators of electronic publications are needed to be developed and properly regulated.

The Imperialism of Categories: Concepts and Contexts in Communication for Social Change

AbstractThis article is a critique of communication and social change (CSC) theory. It makes a case for re-centring context in theory and practice and for appropriate uses of categories and concepts to the making sense of of situations in the developing world. Based on fieldwork with an indigenous community in South India, the Irulas, the article explores their very specific context on the margins of globalising India and their experience with access to and use of laptops provided by the State government. It argues that David Harvey’s concept ‘Accumulation by Dispossession’ (ABD) ‘travels well’ and can be used to make sense of the contexts of the precariat and in particular, communities such as the Irulas. Based on conversations with theory in CSC it makes a strong case for the need for textured understandings of cultural and social contexts as the basis for CSC interventions.

School technology leadership vision and challenges

Purpose The purpose of this paper is to examine the significant challenges school administrators encountered leading a one-to-one laptop school and what vision school administrators have for one-to-one laptop use in the classroom. Design/methodology/approach The methodology for this study was a case study approach. In total, 15 school administrators were interviewed from the Western region of the USA. Findings Results from the study indicated that significant challenges for school administrators were budgeting and sustaining the initiative, and negotiating and setting expectations for instructional use with teachers. School administrators also envisioned one-to-one laptop use as a mean to enhance student-centered learning and inquiry. Research limitations/implications Further research is needed which examines how school administrators make financial decisions in regards to sustaining one-on-one laptop initiatives and how they manage conflict with teachers in respect to one-to-one laptop instruction. Originality/value Minimal literature exists which examines the challenges and vision of school technology leaders. Policy-makers and school administrators can use the findings to recreate teacher evaluation forms, develop conflict management strategies and teaching standards that are aligned and conducive to one-to-one laptop schools.

Clinical features and etiology of patients with erythema ab igne: A retrospective multicenter study.

The aim of this study was to investigate the demographic and clinical features, etiology of patients with erythema ab igne (EAI) who presented to our clinics. The present study was conducted on 71 patients who were admitted to our dermatology clinics between April 2018 and June 2019 and were diagnosed with EAI by clinical or histopathological examination. Age, gender, localization of lesions, and etiologic causes of lesions were recorded. Of the 71 patients, 48 (67.6%) were women and 23 (32.4%) were men. The mean age of the patients was 28.6±10.4years. Most of the lesions were localized (60.6%, n=43) on the anterior aspect of both legs. Among the etiological reasons, 53 (74.6%) patients had exposure to heater, 14 (19.7%) patients had exposure to stove, 2 (2.8%) patients had laptop use, 1 (1.4%) patient had tandoor contact, and 1 (1.4%) patient had exposure to hot water bag. One patient was diagnosed with bullous EAI. In conclusion, EAI was also more common in females and lower extremities, which is in accordance with the literature. However, the mean age of occurrence in our study is younger when compared with that in the literature. One case of EAI due to the use of tandoor in our study has not been reported previously. It should be kept in mind that bullous EAI may develop in patients with diabetes mellitus.