METHODS FOR PROTECTING THE EQUIPMENT OF CELLULAR (MOBILE) CONNECTION FROM ELECTROMAGNETIC IMPACT

2021 ◽  
Vol 335 (1) ◽  
pp. 81-89
Author(s):  
Zh. S. Abdimuratov ◽  
Zh. D. Manbetova ◽  
M. N. Imankul ◽  
K. S. Chezhimbayeva ◽  
A. Zh. Sagyndikova
Keyword(s):  
High Frequency ◽  
Electromagnetic Compatibility ◽  
Negative Impact ◽  
High Energy ◽  
Base Station ◽  
Electromagnetic Spectrum ◽  
Negative Consequences ◽  
External Interference ◽  
Extremely High Frequency ◽  
The Impact

Under electromagnetic impact (EMI) of a sufficient level, temporary disruption of functioning, processing, transmission and storage of information in cellular equipment is possible. Possible problems of electromagnetic compatibility (EMC) of a mobile phone and a base station (BS) of cellular connection under the influence of electromagnetic radiation (EMR) from other sources and their negative impact on functioning are considered. The energy of the HF electromagnetic field (EMF) after passing through the protective case can affect the devices of shielded radio electronic equipment (REE), therefore, the possible negative consequences of the impact of high-energy EMF on the REE are described. Possible negative consequences under certain conditions from the influence of the skin-effect, the effects of electrostatic discharge and electromagnetic pulses on electronic devices are given. It is shown that the constructional method of protecting REE from the effects of external electromagnetic factors consists in reducing the collected and transmitted EMF energy by improving the design, placement and installation of equipment. Components of some vendors for 5G systems that are resistant to external interference are given, and the possibilities for reducing the radiation level of a cell phone are noted. The necessity of an integrated approach to solving EMC problems is substantiated, which consists in the use of structural, circuitry and structural-functional methods of EMC provision. The new 5G (Fifth Generation) standard will operate at higher operating frequencies compared to previous generations. Due to the workload of the electromagnetic spectrum at frequencies below 6 GHz, 5G networks will be based on wireless radio access systems operating at frequencies of 30–100 GHz, that is, in the lower band of the extremely high frequency range EHF (Extremely High Frequency), 30–300 GHz.

scholarly journals METHODS FOR PROTECTING THE EQUIPMENT OF CELLULAR (MOBILE) CONNECTION FROM ELECTROMAGNETIC IMPACT

2021 ◽  
Vol 335 (1) ◽  
pp. 81-89
Author(s):  
Zh. S. Abdimuratov ◽  
Zh. D. Manbetova ◽  
M. N. Imankul ◽  
K. S. Chezhimbayeva ◽  
A. Zh. Sagyndikova
Keyword(s):  
High Frequency ◽  
Electromagnetic Compatibility ◽  
Negative Impact ◽  
High Energy ◽  
Base Station ◽  
Electromagnetic Spectrum ◽  
Negative Consequences ◽  
External Interference ◽  
Extremely High Frequency ◽  
The Impact

Under electromagnetic impact (EMI) of a sufficient level, temporary disruption of functioning, processing, transmission and storage of information in cellular equipment is possible. Possible problems of electromagnetic compatibility (EMC) of a mobile phone and a base station (BS) of cellular connection under the influence of electromagnetic radiation (EMR) from other sources and their negative impact on functioning are considered. The energy of the HF electromagnetic field (EMF) after passing through the protective case can affect the devices of shielded radio electronic equipment (REE), therefore, the possible negative consequences of the impact of high-energy EMF on the REE are described. Possible negative consequences under certain conditions from the influence of the skin-effect, the effects of electrostatic discharge and electromagnetic pulses on electronic devices are given. It is shown that the constructional method of protecting REE from the effects of external electromagnetic factors consists in reducing the collected and transmitted EMF energy by improving the design, placement and installation of equipment. Components of some vendors for 5G systems that are resistant to external interference are given, and the possibilities for reducing the radiation level of a cell phone are noted. The necessity of an integrated approach to solving EMC problems is substantiated, which consists in the use of structural, circuitry and structural-functional methods of EMC provision. The new 5G (Fifth Generation) standard will operate at higher operating frequencies compared to previous generations. Due to the workload of the electromagnetic spectrum at frequencies below 6 GHz, 5G networks will be based on wireless radio access systems operating at frequencies of 30–100 GHz, that is, in the lower band of the extremely high frequency range EHF (Extremely High Frequency), 30–300 GHz.

scholarly journals The Impact of COVID-19 on Surgical Training: the Past, the Present and the Future

2021 ◽  
Author(s):  
Marina Yiasemidou
Keyword(s):  
Infection Control ◽  
Surgical Training ◽  
New Technologies ◽  
Negative Impact ◽  
Elective Surgery ◽  
Control Measures ◽  
Negative Consequences ◽  
Surgical Services ◽  
The World ◽  
The Impact

AbstractThe COVID-19 pandemic and infection control measures had an unavoidable impact on surgical services. During the first wave of the pandemic, elective surgery, endoscopy, and ‘face-to-face’ clinics were discontinued after recommendations from professional bodies. In addition, training courses, examinations, conferences, and training rotations were postponed or cancelled. Inadvertently, infection control and prevention measures, both within and outside hospitals, have caused a significant negative impact on training. At the same time, they have given space to new technologies, like telemedicine and platforms for webinars, to blossom. While the recovery phase is well underway in some parts of the world, most surgical services are not operating at full capacity. Unfortunately, some countries are still battling a second or third wave of the pandemic with severely negative consequences on surgical services. Several studies have looked into the impact of COVID-19 on surgical training. Here, an objective overview of studies from different parts of the world is presented. Also, evidence-based solutions are suggested for future surgical training interventions.

scholarly journals Does Customer Demotion Jeopardize Loyalty?

2009 ◽  
Vol 73 (3) ◽  
pp. 69-85 ◽  
Author(s):  
Tillmann Wagner ◽  
Thorsten Hennig-Thurau ◽  
Thomas Rudolph
Keyword(s):  
Negative Impact ◽  
Positive Impact ◽  
Loyalty Programs ◽  
Negative Consequences ◽  
Managerial Decision ◽  
Design Variables ◽  
Negative Effect ◽  
Loyalty Intentions ◽  
The Impact ◽  
Scenario Study

Hierarchical loyalty programs award elevated customer status (e.g., “elite membership”) to consumers who meet a predefined spending level. However, if a customer subsequently falls short of the required spending level, firms commonly revoke that status. The authors investigate the impact of such customer demotion on loyalty intentions toward the firm. Building on prospect theory and emotions theory, the authors hypothesize that changes in customer status have an asymmetric negative effect, such that the negative impact of customer demotion is stronger than the positive impact of status increases. An experimental scenario study provides evidence that loyalty intentions are indeed lower for demoted customers than for those who have never been awarded a preferred status, meaning that hierarchical loyalty programs can drive otherwise loyal customers away from a firm. A field study using proprietary sales data from a different industry context demonstrates the robustness of the negative impact of customer demotion. The authors test the extent to which design variables of hierarchical loyalty programs may attenuate the negative consequences of status demotions with a second experimental scenario study and present an analytical model that links status demotion to customer equity to aid managerial decision making.

scholarly journals Ecophysiology of avian migration in the face of current global hazards

2012 ◽  
Vol 367 (1596) ◽  
pp. 1719-1732 ◽  
Author(s):  
Marcel Klaassen ◽  
Bethany J. Hoye ◽  
Bart A. Nolet ◽  
William A. Buttemer
Keyword(s):  
Global Change ◽  
Migratory Birds ◽  
High Energy ◽  
Change Processes ◽  
Negative Consequences ◽  
Long Distance ◽  
Physiological Limits ◽  
The Face ◽  
Abiotic And Biotic Factors ◽  
The Impact

Long-distance migratory birds are often considered extreme athletes, possessing a range of traits that approach the physiological limits of vertebrate design. In addition, their movements must be carefully timed to ensure that they obtain resources of sufficient quantity and quality to satisfy their high-energy needs. Migratory birds may therefore be particularly vulnerable to global change processes that are projected to alter the quality and quantity of resource availability. Because long-distance flight requires high and sustained aerobic capacity, even minor decreases in vitality can have large negative consequences for migrants. In the light of this, we assess how current global change processes may affect the ability of birds to meet the physiological demands of migration, and suggest areas where avian physiologists may help to identify potential hazards. Predicting the consequences of global change scenarios on migrant species requires (i) reconciliation of empirical and theoretical studies of avian flight physiology; (ii) an understanding of the effects of food quality, toxicants and disease on migrant performance; and (iii) mechanistic models that integrate abiotic and biotic factors to predict migratory behaviour. Critically, a multi-dimensional concept of vitality would greatly facilitate evaluation of the impact of various global change processes on the population dynamics of migratory birds.

scholarly journals Conflict and the composition of economic activity in Afghanistan

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Virgilio Galdo ◽  
Gladys Lopez Acevedo ◽  
Martin Rama
Keyword(s):  
Economic Activity ◽  
Land Surface ◽  
High Frequency ◽  
Negative Impact ◽  
Formal Sector ◽  
Nighttime Light ◽  
The Impact ◽  
Conflict Intensity ◽  
Positive Effect ◽  
Sector Data

Abstract Despite informality being the norm in conflict-affected countries, most estimates of the impact of conflict on economic activity rely on formal sector data. Using high-frequency data from Afghanistan, this paper assesses how surges in conflict intensity affect not only the formal sector, but also informal and illicit activities. Nighttime light provides a proxy for aggregate economic activity, mobile phone traffic by registered firms captures fluctuations in formal sector output, and the land surface devoted to poppy cultivation gives a measure of illicit production. The unit of observation is the district and the period of reference is 2012–2016. The results show that an increase in conflict-related casualties has a strong negative impact on formal economic activity in the following quarter and a positive effect on illicit activity after two quarters. The impact on aggregate economic activity is negative, but more muted.

scholarly journals Development and validation of the WhatsApp Negative Impact scale (WANIS)

2019 ◽  
Vol 35 (2) ◽  
pp. 242-250
Author(s):  
Cristina Bernal-Ruiz ◽  
Ángel Rosa-Alcázar ◽  
Víctor González-Calatayud
Keyword(s):  
University Students ◽  
Discriminant Validity ◽  
Instant Messaging ◽  
Negative Impact ◽  
High Reliability ◽  
Negative Consequences ◽  
Daily Lives ◽  
Family Work ◽  
Convergent And Discriminant Validity ◽  
The Impact

The use of instant messaging affects different areas of users’ daily lives (personal, social, family, work). The aim of this research was to develop and validate a scale that measures the negative impact of WhatsApp's use in several areas (WANIS). Two studies were conducted. The first one was a pilot study in which the scale was built. The sample consisted of 95 university students aged between 17 and 27. (M = 21.34; SD = 2.11). In the second study, the factor structure was examined and the validity of the scale was analysed from a sample of 630 university students aged between 18 and 62 (M = 21.23; DT = 4.32). The exploratory factor analysis revealed that the three-factor solution was most appropriate for interpreting the scale. The instrument had high reliability and good convergent and discriminant validity. The results indicated that sex, marital status and employment status affected the negative impact experienced by WhatsApp users. This scale has proven to be a valid tool for assessing the impact that this instant messaging application has on controlling intimate relationships, the negative consequences of its use and the problematic use by users.

RESPONSE OF THE RUSSIAN LABOR MARKET TO THE "FIRST" AND "SECOND" WAVES OF THE COVID-19 PANDEMIC

2021 ◽  
pp. 61-73
Author(s):  
Marina N. Khramova ◽  
◽  
Sergey V. Ryazantsev ◽  
Keyword(s):  
National Economy ◽  
Negative Impact ◽  
Russian Regions ◽  
Negative Consequences ◽  
State Support ◽  
Significant Negative Impact ◽  
The Russian Federation ◽  
Restrictive Measures ◽  
The Impact ◽  
Unstable Dynamics

The paper provides some results of a study of changes that have occurred in the labor markets of Russian regions during the "first" and "second" waves of the COVID-19 pandemic. In particular, it is shown that in 2020 — 2021 there were transformations in the structure of employment of the population of the Russian regions, for example, the number of vacancies in the industries that were most severely affected by the introduction of restrictive measures in the economy decreased, the unemployment rate increased significantly. The negative consequences of the pandemic in one way or another manifested themselves in all Russian regions. However, in a number of regions, which even before the pandemic showed an unstable dynamics of socio-economic development, the impact of the COVID-19 pandemic had a more significant negative impact. This indicates that during a pandemic, divergence processes have intensified in the national economy. At the same time, during the pandemic, some new forms of employment were developed, associated with the need to switch to a remote mode of work. We believe that these new forms of employment will remain relevant both in Russian and international practice even after the end of the pandemic. The paper also analyzes the main measures of state support for the population, small and medium-sized businesses, and migrants. It is shown that, in general, the measures of state support during the pandemic were timely and made it possible to avoid the collapse of the national economy. It is concluded that support measures should be more regionally differentiated in order to take into account the specifics of the economy of the regions of the Russian Federation.

scholarly journals Examining the Associations between Psychological Flexibility, Mindfulness, Psychosomatic Functioning, and Anxiety during the COVID-19 Pandemic: A Path Analysis

2020 ◽  
Vol 17 (23) ◽  
pp. 8764
Author(s):  
Benita Wielgus ◽  
Witold Urban ◽  
Aleksandra Patriak ◽  
Łukasz Cichocki
Keyword(s):  
Path Analysis ◽  
State Anxiety ◽  
Negative Impact ◽  
Psychological Flexibility ◽  
Self Report ◽  
Mindfulness Practice ◽  
Negative Consequences ◽  
Leading Role ◽  
The Impact ◽  
The Relationship

Social distancing plays a leading role in controlling the spread of coronavirus. However, prolonged lockdown can lead to negative consequences in terms of mental health. The goal of the research is to examine the relationship between anxiety and general psychosomatic functioning during the COVID-19 pandemic; the impact of psychological flexibility and mindfulness is also considered. Variables were measured with self-report questionnaires and symptom checklists. The sample included 170 people (M = 27.79, SD = 8.16). Pearson’s correlation, stepwise regression, and path analysis were conducted. The results showed a significant positive relationship between state anxiety and somatic and psychological responses to the pandemic. Path analysis revealed that mindfulness had a direct negative impact on and decreased the level of state anxiety (b = −0.22, p = 0.002), whereas psychological flexibility influenced the variable indirectly (b = 0.23, p = 0.002) by enhancing psychosomatic functioning (b = −0.64, p < 0.001). Psychological flexibility and mindfulness may mediate the development of mental disorders and facilitate achieving overall wellbeing. The study points to the usefulness of mindfulness practice as a form of self-help with anxiety symptoms; this is crucial during the pandemic because contact with clients is restricted.

scholarly journals The Influence of Milling Conditions on the Ni3Fe Alloyed Powder

2015 ◽  
Vol 13 ◽  
pp. 75-82
Author(s):  
Călin Virgiliu Prică ◽  
Cristina Daniela Stanciu ◽  
Florin Popa ◽  
Ionel Chicinaş
Keyword(s):  
High Frequency ◽  
Rotation Speed ◽  
High Energy ◽  
Milling Process ◽  
Planetary Mill ◽  
Energy Conditions ◽  
Particle Sizes ◽  
Grain Sizes ◽  
Disk Rotation ◽  
The Impact

The mechanosynthesis of Ni3Fe intermetallic compound was carried out in a planetary mill. The effects of milling parameters such as balls diameters and ball milling speed defined by the vials rotation speed (ω) and the disk rotation speed (Ω), on morphology, microstructure and particle sizes of Ni3Fe powder were studied. It was found that the impact frequency represented by the number of balls from vials is an important parameter a milling process. The smaller grain sizes and particle was obtained when milling process was performed in high frequency rate of impacts together with high balls velocity, meaning high energy conditions.

scholarly journals Bystanders intervene to impede grooming in Western chimpanzees and sooty mangabeys

2017 ◽  
Vol 4 (11) ◽  
pp. 171296 ◽  
Author(s):  
Alexander Mielke ◽  
Liran Samuni ◽  
Anna Preis ◽  
Jan F. Gogarten ◽  
Catherine Crockford ◽  
...  
Keyword(s):  
Social Relationships ◽  
Negative Impact ◽  
Dominance Rank ◽  
Primate Species ◽  
Negative Consequences ◽  
Sooty Mangabeys ◽  
Lower Ranking ◽  
Cercocebus Atys ◽  
The Impact ◽  
The Relationship

Grooming interactions benefit groomers, but may have negative consequences for bystanders. Grooming limits bystanders' grooming access and ensuing alliances could threaten the bystander's hierarchy rank or their previous investment in the groomers. To gain a competitive advantage, bystanders could intervene into a grooming bout to increase their own grooming access or to prevent the negative impact of others' grooming. We tested the impact of dominance rank and social relationships on grooming intervention likelihood and outcome in two sympatric primate species, Western chimpanzees ( Pan troglodytes verus ) and sooty mangabeys ( Cercocebus atys atys ). In both species, rather than increasing their own access to preferred partners, bystanders intervened mainly when an alliance between groomers could have a negative impact on them: when the lower-ranking groomer was close to the bystander in rank, when either groomer was an affiliation partner whose services they could lose, or the groomers were not yet strongly affiliated with each other. Thus, bystanders in both species appear to monitor grooming interactions and intervene based on their own dominance rank and social relationships, as well as triadic awareness of the relationship between groomers. While the motivation to intervene did not differ between species, mangabeys appeared to be more constrained by dominance rank than chimpanzees.

Sign in / Sign up

Export Citation Format

Share Document