Estimation of the Performance Measures of a Group of Servers Taking into Account Blocking and Call Repetition before and after Server Occupation

The model of a fully available group of servers with a Poisson flow of primary calls and the possibility of losses before and after occupying a free server is considered. Additionally, a call can leave the system because of the aging of transmitted information. After each loss, there is some probability that a customer repeats the call. Such models are seen in the modeling of various telecommunication systems such as emergency information services, call and contact centers, access nodes, etc., functioning in overloading situations. The stationary behavior of the system is described by the infinite-state Markov process. It is shown that stationary characteristics of the model can be calculated with the help of an auxiliary model of the same class but without call repetitions due to losses occurring before and after the occupation of a free server and the aging of transmitted information. The performance measurements of the auxiliary model are calculated by solving a system of state equations using a recursive algorithm based on the concept of the truncation of the used state space. This approach allows significant savings of computer resources to be made by ignoring highly unlikely states in the process of calculation. The error caused by truncation is estimated. The presented numerical examples illustrate the use of the model for the elimination of the negative effects of emergency information service overload based on the filtering of the input flow of calls.

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Reviewing the Effect of 10 Days of Intense Exercise Period on Certain Blood Parameters of Tennis Players

Journal of Education and Training Studies ◽

10.11114/jets.v6i11.3469 ◽

2018 ◽

Vol 6 (11) ◽

pp. 95

Author(s):

Muzaffer Selcuk ◽

Vedat Cinar ◽

Mucahit Sarikaya ◽

Salih Oner

Keyword(s):

Statistical Significance ◽

Exercise Program ◽

Blood Parameters ◽

Intense Exercise ◽

Negative Effects ◽

Blood Samples ◽

Tennis Players ◽

Before And After ◽

Exercise Period ◽

Competition Period

This study aims to observe the possible negative effects that might occur on bio-chemistry and hemogram values of tennis players during the intense competition period by comparing the blood values of pre-competition period with 10 days of intense exercise. Blood samples were obtained from tennis team players who do not have any specific health problems and who study in university and regularly exercise. Mean age of the athletes are 22,40 ± 3,20 years and mean height is 179,83 ± 7,57 cm. This study is performed with 14 volunteer tennis players. Blood samples are obtained during the first day of the intense exercise program after the exercise, last day of the exercises and also right after the exercises. As per the obtained data, descriptive statistics are run (mean and standard deviation) and in order to compare the values of before and after the 10 days of intense exercise, Wilcoxon two related sample test was used. As per the results of the blood tests from before and after the exercise period, it is seen that values such as AST, ALT, MCH, MCHC and CK showed statistical significance (P<0.05). The athletes who prepared for the competitions with these values showed positive increases in bio-chemistry and hemogram values.

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Effect of 12 Months of Exercise with Stachys Lavandulifolia Consumption on anxiety, Metabolic Syndrome Profiles and Antioxidant Defense and Lipid Peroxidation in Women with Syndrome Metabolic

10.21203/rs.3.rs-129277/v1 ◽

2020 ◽

Author(s):

Ali osali ◽

Alireza Rostami

Keyword(s):

Metabolic Syndrome ◽

Lipid Peroxidation ◽

Aerobic Exercise ◽

Antioxidant Defense ◽

Training Group ◽

Serum Levels ◽

Control Group ◽

Negative Effects ◽

Beneficial Effects ◽

Before And After

Abstract BackgroundThe purpose of this study was to investigate the effect of 12 months of aerobic exercise combining stachys lavandulifolia (S. lavandulifolia) consumption on anxiety, Metabolic Syndrome profiles and antioxidant defense (Glutathione) and lipid peroxidation (Malondialdehyde) in 50-65 years old women with syndrome metabolic.Methods48 women with syndrome Metabolic were randomly divided into four groups: exercise (n=12), exercise+S. lavandulifolia (n=12), S. lavandulifolia (n=12) and control group (n=12). S. lavandulifolia groups consumed 3 g aerial parts of S. lavandulifolia daily. Training groups performed an exercise protocol of aerobic exercise for 12 months (three sessions per week). Blood samples were obtained before and after training period for antioxidant indicators and lipid degradation measurement. Also, Beck anxiety questionnaire used for evaluating levels of anxiety. T-test and one-way analysis of variance were used for the evaluation of within-group and between-group differences, respectively.ResultsA significant increase was observed in serum levels of Malondialdehyde (P =0.004), Catalase indexes (Pvalue= 0.01), and Glutathione (P=0.001) in the training group and S. lavandulifolia groups after 12 months. Body weight, BMI, and SBP and Anexiety was decreased significantly greater in exercise +S. lavandulifolia group compared to control, exercise and S. lavandulifolia groups (P=0.001)ConclusionAnxiolytic effect and Anti-Oxidative Stress Activity was seen, so taking S. lavandulifolia along with exercises may have beneficial effects on reinforcement the antioxidant system and prevention of anxiety and The negative effects of indicators related to cardiovascular disease in women with metabolic syndrome.

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Impact of COVID-19 on Physical Activity Among 10,000 Steps Members and Engagement With the Program in Australia: Prospective Study (Preprint)

10.2196/preprints.23946 ◽

2020 ◽

Author(s):

Quyen G To ◽

Mitch J Duncan ◽

Anetta Van Itallie ◽

Corneel Vandelanotte

Keyword(s):

Physical Activity ◽

Age Groups ◽

Health Impact ◽

Activity Levels ◽

Physical And Mental Health ◽

Negative Effects ◽

South Wales ◽

First Case ◽

Before And After ◽

Important Health

BACKGROUND Physical activity is an important health behavior, due to its association with many physical and mental health conditions. During distressing events, such as the COVID-19 pandemic, there is a concern that physical activity levels may be negatively impacted. However, recent studies have shown inconsistent results. Additionally, there is a lack of studies in Australia on this topic. OBJECTIVE The aim of this study is to investigate changes in physical activity reported through the 10,000 Steps program and changes in engagement with the program during the COVID-19 pandemic. METHODS Data between January 1, 2018, and June 30, 2020, from registered members of the 10,000 Steps program, which included 3,548,825 days with step data, were used. The number of daily steps were logged manually by the members or synced automatically from their activity trackers connected to the program. Measures on program usage were the number of new registered members per day, the number of newly registered organizations per day, the number of steps logged per day, and the number of step entries per day. Key dates used for comparison were as follows: the first case with symptoms in Wuhan, China; the first case reported in Australia; the implementation of a 14-day ban for noncitizens arriving in Australia from China; the start of the lockdown in Australia; and the relaxing of restrictions by the Australian Government. Wilcoxon signed-rank tests were used to test for significant differences in number of steps between subgroups, between engagement measures in 2019 versus 2020, and before and after an event. RESULTS A decrease in steps was observed after the first case in Australia was reported (1.5%; P=.02) and after the start of the lockdown (3.4%; P<.001). At the time that the relaxing of restrictions started, the steps had already recovered from the lockdown. Additionally, the trends were consistent across genders and age groups. New South Wales, Australian Capital Territory, and Victoria had the greatest step reductions, with decreases of 7.0% (P<.001), 6.2% (P=.02), and 4.7% (P<.001), respectively. During the lockdown, the use of the program increased steeply. On the peak day, there were more than 9000 step entries per day, with nearly 100 million steps logged per day; in addition, more than 450 new users and more than 15 new organizations registered per day, although the numbers decreased quickly when restrictions were relaxed. On average per day, there were about 55 new registered users (P<.001), 2 new organizations (P<.001), 25.6 million steps (P<.001), and 2672 log entries (P<.001) more in 2020 compared to the same period in 2019. CONCLUSIONS The pandemic has had negative effects on steps among Australians across age groups and genders. However, the effect was relatively small, with steps recovering quickly after the lockdown. There was a large increase in program usage during the pandemic, which might help minimize the health impact of the lockdown and confirms the important role of physical activity programs during times of distress and lockdowns.

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Wind Turbine Noise Reduction from Seismological Data

10.5194/egusphere-egu21-4907 ◽

2021 ◽

Author(s):

Janis Heuel ◽

Wolfgang Friederich

Keyword(s):

Signal To Noise Ratio ◽

Low Cost ◽

Computational Cost ◽

Noise Signal ◽

Noise Model ◽

Threshold Function ◽

High Signal ◽

Time Data ◽

Negative Effects ◽

Before And After

Over the last years, installations of wind turbines (WTs) increased worldwide. Owing to negative effects on humans, WTs are often installed in areas with low population density. Because of low anthropogenic noise, these areas are also well suited for sites of seismological stations. As a consequence, WTs are often installed in the same areas as seismological stations. By comparing the noise in recorded data before and after installation of WTs, seismologists noticed a substantial worsening of station quality leading to conflicts between the operators of WTs and earthquake services.In this study, we compare different techniques to reduce or eliminate the disturbing signal from WTs at seismological stations. For this purpose, we selected a seismological station that shows a significant correlation between the power spectral density and the hourly windspeed measurements. Usually, spectral filtering is used to suppress noise in seismic data processing. However, this approach is not effective when noise and signal have overlapping frequency bands which is the case for WT noise. As a first method, we applied the continuous wavelet transform (CWT) on our data to obtain a time-scale representation. From this representation, we estimated a noise threshold function (Langston & Mousavi, 2019) either from noise before the theoretical P-arrival (pre-noise) or using a noise signal from the past with similar ground velocity conditions at the surrounding WTs. Therefore, we installed low cost seismometers at the surrounding WTs to find similar signals at each WT. From these similar signals, we obtain a noise model at the seismological station, which is used to estimate the threshold function. As a second method, we used a denoising autoencoder (DAE) that learns mapping functions to distinguish between noise and signal (Zhu et al., 2019).In our tests, the threshold function performs well when the event is visible in the raw or spectral filtered data, but it fails when WT noise dominates and the event is hidden. In these cases, the DAE removes the WT noise from the data. However, the DAE must be trained with typical noise samples and high signal-to-noise ratio events to distinguish between signal and interfering noise. Using the threshold function and pre-noise can be applied immediately on real-time data and has a low computational cost. Using a noise model from our prerecorded database at the seismological station does not improve the result and it is more time consuming to find similar ground velocity conditions at the surrounding WTs.

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Decreased otolith-mediated vestibular response in 25 astronauts induced by long-duration spaceflight

Journal of Neurophysiology ◽

10.1152/jn.00065.2016 ◽

2016 ◽

Vol 115 (6) ◽

pp. 3045-3051 ◽

Cited By ~ 23

Author(s):

Emma Hallgren ◽

Ludmila Kornilova ◽

Erik Fransen ◽

Dmitrii Glukhikh ◽

Steven T. Moore ◽

...

Keyword(s):

Orthostatic Intolerance ◽

Balance Control ◽

Head Tilt ◽

Otolith Organs ◽

Negative Effects ◽

Spatial Disorientation ◽

Long Duration ◽

Before And After ◽

Ocular Counterrolling ◽

Otolith System

The information coming from the vestibular otolith organs is important for the brain when reflexively making appropriate visual and spinal corrections to maintain balance. Symptoms related to failed balance control and navigation are commonly observed in astronauts returning from space. To investigate the effect of microgravity exposure on the otoliths, we studied the otolith-mediated responses elicited by centrifugation in a group of 25 astronauts before and after 6 mo of spaceflight. Ocular counterrolling (OCR) is an otolith-driven reflex that is sensitive to head tilt with regard to gravity and tilts of the gravito-inertial acceleration vector during centrifugation. When comparing pre- and postflight OCR, we found a statistically significant decrease of the OCR response upon return. Nine days after return, the OCR was back at preflight level, indicating a full recovery. Our large study sample allows for more general physiological conclusions about the effect of prolonged microgravity on the otolith system. A deconditioned otolith system is thought to be the cause of several of the negative effects seen in returning astronauts, such as spatial disorientation and orthostatic intolerance. This knowledge should be taken into account for future long-term space missions.

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HUBUNGAN PELAYANAN INFORMASI OBAT TERHADAP KEPATUHAN MINUM OBAT PASIEN HIPERTENSI DI RSUD PENAJAM PASER UTARA

Jurnal Ilmiah Manuntung ◽

10.51352/jim.v3i1.85 ◽

2017 ◽

Vol 3 (1) ◽

pp. 7

Author(s):

Triswanto Sentat

Keyword(s):

Patient Adherence ◽

Information Service ◽

Rank Correlation ◽

Pill Count ◽

Adherence Rate ◽

Validity And Reliability ◽

Adherence To Medication ◽

Count Method ◽

Before And After ◽

Questionnaire Method

The Drug Information Service or Pelayanan Informasi Obat (PIO) is indispensable for improving patient compliance with their treatment. With the PIO can change the knowledge and compliance of patients, especially hypertensive patients. This study was conducted to determine whether PIO can influence adherence to medication hypertension patients in RSUD Penajam Paser Utara. Sampling was done by purposive sampling and analyzed using Spearman Rank Correlation Test where the compliance aspect was assessed using validity and reliability tested questionnaire method, given before PIO and after PIO, and Pill Count method (calculating the remaining pills for 4 weeks) . Samples were obtained by 50 people, the results showed no improvement in adherence before and after PIO administration, and there was a relationship of compliance measurement results with questionnaire method after counseling and Pill Count method. The percentage of patient adherence after PIO administration was based on a high-compliance 70% (35 person) questionnaire method and based on the Pill Count method with a high adherence rate of 60% (30 persons), the compliance data obtained from both methods indicated that the provision of PIO can not improve compliance to take medication of hypertension patient of RSUD Penajam Paser Utara

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Increment of Fatigue, Depression, and Stage Fright During the First Year of High-Level Education in Music Students

Medical Problems of Performing Artists ◽

10.21091/mppa.2012.1008 ◽

2012 ◽

Vol 27 (1) ◽

pp. 43-48 ◽

Cited By ~ 14

Author(s):

Horst Hildebrandt ◽

Matthias Nübling ◽

Victor Candia

Keyword(s):

Music Performance ◽

Music Students ◽

Stage Fright ◽

Negative Effects ◽

Professional Musicians ◽

Freshman Year ◽

Work Related ◽

Custom Made ◽

Before And After ◽

High Level

BACKGROUND: Public opinion associates music performance with pleasure, relaxation, and entertainment. Nevertheless, several studies have shown that professional musicians and music students are often affected by work-related burdens. These are closely related to stress and anxiety. OBJECTIVE: Scrutinizing specific health strains and work attitudes of music students during their freshman year of high-level education. METHODS: One hundred five students in three Swiss music universities were part of a longitudinal study using standardized assessment questionnaires. Before and after their first study year, some custom-made questionnaires designed to fit the particular work environment of musicians were used together with the already validated inquiry instruments. RESULTS: Fatigue, depression, and stage fright increased significantly. CONCLUSIONS: Our results indicate more study is needed and attempts should be made to minimize the stress level, improve the students’ ability to cope with stress, and otherwise reduce their risk for injury. This appears particularly important considering the long-term negative effects of stressors on individuals’ health as revealed by modern research.

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Reform and innovation of artificial intelligence technology for information service in university physical education

Journal of Intelligent & Fuzzy Systems ◽

10.3233/jifs-189372 ◽

2020 ◽

pp. 1-11

Author(s):

Jianye Zhang

Keyword(s):

Artificial Intelligence ◽

Big Data ◽

Physical Education ◽

Information Service ◽

Management Decision ◽

Negative Effects ◽

Education Management ◽

Depth Analysis ◽

Artificial Intelligence Technology ◽

The Difference

This article analyzes the reform of information services in university physical education based on artificial intelligence technology and conducts in-depth and innovative research on it. In-depth analysis of the relationship between big data and the development and application of information technology such as the Internet, Internet of Things, cloud computing, to clarify the difference and connection between big data, informatization and intelligence. Artificial intelligence will bring opportunities for changes in data collection, management decision-making, governance models, education and teaching, scientific research services, evaluation and evaluation of physical education in our university. At the same time, big data education management in colleges and universities faces many challenges such as the balance of privacy and freedom, data hegemony, data junk, data standards, and data security, and they have many negative effects. In accordance with the requirements of educational modernization, centering on the goal of intelligent and humanized education management, it aims existing issues in college physical education management.

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Demineralization Inhibitory Effects of Highly Concentrated Fluoride Dentifrice and Fluoride Gels/Solutions on Sound Dentin and Artificial Dentin Caries Lesions in vitro

Caries Research ◽

10.1159/000509931 ◽

2020 ◽

pp. 1-14

Author(s):

Daniel Erdwey ◽

Hendrik Meyer-Lueckel ◽

Marcella Esteves-Oliveira ◽

Christian Apel ◽

Richard Johannes Wierichs

Keyword(s):

In Vitro Study ◽

Inhibitory Effect ◽

Negative Effects ◽

Dentin Caries ◽

Before And After ◽

Amine Fluoride ◽

Ph Cycling ◽

Fluoride Dentifrice ◽

Caries Lesions

Objectives: The aim of this in vitro study was to compare the demineralization inhibitory effect of gels/solutions used in combination with either standard or highly fluoridated dentifrices on sound dentin as well as on artificial dentin caries-like lesions. Methods: Bovine dentin specimens (n = 240) with two different surfaces each (sound [ST] and artificial caries lesion [DT]) were prepared and randomly allocated to twelve groups. Weekly interventions during pH-cycling (28 days, 6 × 120 min demineralization/day) were: the application of gels/solutions containing amine fluoride/sodium fluoride (12,500 ppm F [ppm]; pH = 4.4; AmF); NaF (12,500 ppm; pH = 6.6; NaF1); NaF (12,500 ppm; pH = 6.3; NaF2); silver diamine fluoride (14,200 ppm; pH = 8.7; SDF); acidulated phosphate fluoride (12,500 ppm; pH = 3.8; APF), and no intervention (standard control; S). Furthermore, half of the specimens in each group were brushed (10 s; twice per day) with dentifrice slurries containing either 1,450 ppm (e.g., AmF1450) or 5,000 ppm (e.g., AmF5000). Differences in integrated mineral loss (ΔΔZ) and lesion depth (ΔLD) were calculated between values before and after pH-cycling using transversal microradiography. Results: After pH-cycling Ss showed significantly increased ΔZDT and LDDT values, indicating further demineralization. In contrast, except for one, all groups including fluoride gels/solutions showed significantly decreased ΔZDT values. Additional use of most fluoride gels/solutions significantly enhanced mineral gain, mainly in the surface area; however, acidic gels/solutions seemed to have negative effects on lesion depths. Significance: Under the present pH-cycling conditions the highly fluoridated dentifrice significantly reduced caries progression and additional application of nearly all of the fluoride gels/solutions resulted in remineralization. However, there was no difference in the remineralizing capacity of fluoride gels/solutions when used in combination with either standard or highly fluoridated dentifrices.

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Nurse and parent perceptions associated with the Parent Education Discharge Instruction Programme in southern India

Cardiology in the Young ◽

10.1017/s1047951115002164 ◽

2015 ◽

Vol 26 (6) ◽

pp. 1168-1175 ◽

Cited By ~ 4

Author(s):

Sandra L. Staveski ◽

V. P Parveen ◽

Sai B. Madathil ◽

Susan Kools ◽

Linda S. Franck

Keyword(s):

Home Care ◽

Hospital Discharge ◽

Parent Education ◽

Health And Safety ◽

Parent Perceptions ◽

Programme Implementation ◽

Negative Effects ◽

Teaching Programme ◽

Discharge Instruction ◽

Before And After

AbstractIntroductionParents of children with CHD require home care knowledge in order to ensure their child’s health and safety, but there has been no research on how to achieve this in a resource-constrained environment. The aim of this investigation was to compare parent and nurse perceptions of parent readiness for discharge after a structured nurse-led parent discharge teaching programme in India.Materials and methodsA pre-post design was used to compare parent and nurse perceptions of parental uncertainty and readiness for hospital discharge before and after introduction of the parent education discharge instruction programme in a paediatric cardiac surgery unit.ResultsParents (n=68) and nurses (n=63) participated in this study. After the discharge programme implementation, parents had less uncertainty (M=93.3 SD=10.7 versus M=83.6 SD=4.9, p=0.001) and ambiguity (M=40.8 SD=6.8 versus M=33.4 SD=3.7, p=0.001) about their child’s illness; however, they rated themselves as being less able to cope with the transition to home (M=24.3 SD=4.1 versus 23.1 SD=2.2, p=0.001) and as having less support at home than that required (M=31.5 SD=9.9 versus 30.9 SD=3.2, p=0.001). Parents’ and nurses’ perception of parental readiness for hospital discharge were more closely aligned after implementation of a nurse-led discharge programme (r=0.81, p=0.001).ConclusionThe results of this study suggest that the discharge programme had positive and negative effects on parental perceptions of uncertainty and readiness for discharge. Further examination is warranted to delineate these influences and to design methods for supporting parents during the transition to home care.

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