scholarly journals Spectral Asymmetry and Higuchi’s Fractal Dimension Measures of Depression Electroencephalogram

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Maie Bachmann ◽  
Jaanus Lass ◽  
Anna Suhhova ◽  
Hiie Hinrikus
Keyword(s):  
Fractal Dimension ◽  
Detection Rate ◽  
Single Channel ◽  
Asymmetry Index ◽  
Control Group ◽  
Band Spectrum ◽  
Eeg Analysis ◽  
True Detection ◽  
Spectral Asymmetry ◽  
The Time Domain

This study was aimed to compare two electroencephalogram (EEG) analysis methods, spectral asymmetry index (SASI) and Higuchi’s fractal dimension (HFD), for detection of depression. Linear SASI method is based on evaluation of the balance of powers in two EEG frequency bands in one channel selected higher and lower than the alpha band spectrum maximum. Nonlinear HFD method calculates fractal dimension directly in the time domain. The resting EEG signals of 17 depressive patients and 17 control subjects were used as a database for calculations. SASI values were positive for depressive and negative for control group (P<0.05). SASI provided the true detection rate of 88% in the depressive and 82% in the control group. The calculated HFD values detected a small (3%) increase with depression (P<0.05). HFD provided the true detection rate of 94% in the depressive group and 76% in the control group. The rate of correct indication in the both groups was 85% using SASI or HFD. Statistically significant variations were not revealed between hemispheres (P>0.05). The results indicated that the linear EEG analysis method SASI and the nonlinear HFD method both demonstrated a good sensitivity for detection of characteristic features of depression in a single-channel EEG.

Condition of the psychoemotional and vegetative status at women with a repeated placental dysfuction

2016 ◽  
pp. 50-52
Author(s):  
D.A. Govseev ◽  
Keyword(s):  
Nervous System ◽  
Single Channel ◽  
Clinical Laboratory ◽  
Cardiac Activity ◽  
Psychological Status ◽  
Control Group ◽  
Vegetative Nervous System ◽  
Previous Pregnancy ◽  
Placental Dysfunction ◽  
Vegetative Status

The objective: studying of features of the psychoemotional and vegetative status at women with placental dysfunction at the previous pregnancy. Patients and methods. Complex clinical-laboratory examination of 89 women, from which was conducted: control group – 42 obstetrically and somatically healthy multipara, delivery through natural patrimonial ways; І group – 47 women with placental dysfunction at the previous pregnancy. Carried out a cardiointervalografia by means of a single-channel electrocardiograph and used a scale questionnaire of a condition of the pregnant woman. Results. It is established that regulation of cardiac rhythm at women at the previous pregnancy happens to placental dysfunction in the conditions of an autonomous contour which controls normal work of heart and vegetative nervous system. Further, there is an expressed strain of regulatory mechanisms that is shown by centralization of management of cardiac activity and sharp rising of activity of sympathetic nervous system. At the final stage influence of the central contour considerably decreases and patofunctionale vegetative equilibrium is again formed. Conclusions. The received results need to be considered when developing tactics of conducting pregnancy at these women. Key words: placental dysfunction, vegetative and psychological status.

scholarly journals A Multi-Class Automatic Sleep Staging Method Based on Photoplethysmography Signals

Entropy ◽  
2021 ◽  
Vol 23 (1) ◽  
pp. 116
Author(s):  
Xiangfa Zhao ◽  
Guobing Sun
Keyword(s):  
Time Domain ◽  
Single Channel ◽  
Kappa Statistic ◽  
Gradient Boosting ◽  
Sleep Staging ◽  
Challenging Problem ◽  
Sleep State ◽  
Light Gradient ◽  
Gradient Boosting Machine ◽  
The Time Domain

Automatic sleep staging with only one channel is a challenging problem in sleep-related research. In this paper, a simple and efficient method named PPG-based multi-class automatic sleep staging (PMSS) is proposed using only a photoplethysmography (PPG) signal. Single-channel PPG data were obtained from four categories of subjects in the CAP sleep database. After the preprocessing of PPG data, feature extraction was performed from the time domain, frequency domain, and nonlinear domain, and a total of 21 features were extracted. Finally, the Light Gradient Boosting Machine (LightGBM) classifier was used for multi-class sleep staging. The accuracy of the multi-class automatic sleep staging was over 70%, and the Cohen’s kappa statistic k was over 0.6. This also showed that the PMSS method can also be applied to stage the sleep state for patients with sleep disorders.

scholarly journals Efficacy of pediatric integrative manual therapy in positional plagiocephaly: a randomized controlled trial

2021 ◽  
Vol 47 (1) ◽  
Author(s):  
Iñaki Pastor-Pons ◽  
María Orosia Lucha-López ◽  
Marta Barrau-Lalmolda ◽  
Iñaki Rodes-Pastor ◽  
Ángel Luis Rodríguez-Fernández ◽  
...  
Keyword(s):  
Manual Therapy ◽  
Education Program ◽  
Controlled Trial ◽  
Asymmetry Index ◽  
Trial Registration ◽  
Control Group ◽  
Parental Perception ◽  
Positional Plagiocephaly ◽  
Caregiver Education ◽  
Registration Number

Abstract Background Positional plagiocephaly frequently affects healthy babies. It is hypothesized that manual therapy tailored to pediatrics is more effective in improving plagiocephalic cranial asymmetry than just repositioning and sensory and motor stimulation. Methods Thirty-four neurologically healthy subjects aged less than 28 weeks old with a difference of at least 5 mm between cranial diagonal diameters were randomly distributed into 2 groups. For 10 weeks, the pediatric integrative manual therapy (PIMT) group received manual therapy plus a caregiver education program, while the controls received the same education program exclusively. Cranial shape was evaluated using anthropometry; cranial index (CI) and cranial vault asymmetry index (CVAI) were calculated. Parental perception of change was assessed using a visual analogue scale (− 10 cm to + 10 cm). Results CVAI presented a greater decrease in PIMT group: 3.72 ± 1.40% compared with 0.34 ± 1.72% in the control group (p = 0.000). CI did not present significant differences between groups. Manual therapy led to a more positive parental perception of cranial changes (manual therapy: 6.66 ± 2.07 cm; control: 4.25 ± 2.31 cm; p = 0.004). Conclusion Manual therapy plus a caregiver education program improved CVAI and led to parental satisfaction more effectively than solely a caregiver education program. Trial registration Trial registration number: NCT03659032; registration date: September 1, 2018. Retrospectively registered.

scholarly journals Mandibular Asymmetry in Different Occlusion Patterns

2007 ◽  
Vol 77 (5) ◽  
pp. 803-807 ◽  
Author(s):  
Omer Said Sezgin ◽  
Peruze Celenk ◽  
Selim Arici
Keyword(s):  
Class Ii ◽  
Asymmetry Index ◽  
Control Group ◽  
Class Iii ◽  
Mandibular Asymmetry ◽  
Normal Occlusion ◽  
Division 1 ◽  
Index Value ◽  
Age Range ◽  
Division 2

Abstract Objective: To investigate the effects of different occlusion types on the mandibular asymmetry in young individuals. Materials and Methods: Mandibular asymmetry measurements were performed on the panoramic radiographs of 189 subjects (104 females and 85 males; age range, 11–15 years), with different occlusion patterns. The subjects were divided into five groups according to the occlusion types, namely, Angle Class I (Cl I), Class II division 1 (Cl II/1), Class II division 2 (Cl II/2), Class III (Cl III), and normal occlusions. The Kruskal-Wallis test was used to determine the possible statistically significant differences between the groups for condyle, ramus, and condyle-plus-ramus asymmetry index measurements. Identified differences between groups were further analyzed using the Mann-Whitney U-test at the 95% confidence interval (P &lt; .05). Results: There were no statistically significant differences between male and female subjects. The Kruskal-Wallis test showed that the occlusion type had a significant effect on the condylar asymmetry. In Cl II/1 cases, condylar asymmetry values were significantly different from the values of Cl II/2 and Cl III malocclusion and normal occlusion types. The normal occlusion control group was significantly different from those of Cl II/1 and the Cl I malocclusion groups. Conclusion: Cl II/1 malocclusion has a significant effect on the condylar asymmetry index when compared to Cl II/2 and Cl III malocclusion and normal occlusion types. However, the mean condylar asymmetry index value in Cl II/1 malocclusion was not different from Cl I malocclusion.

Effect Of Cluster Intervention Strategy Combined with Targeted Nursing on Prevention of Ventilator-Associated Pneumonia in Icu Patients

2021 ◽  
Vol 7 (6) ◽  
pp. 6395-6401
Author(s):  
XueQin Li ◽  
XiuYing Chen
Keyword(s):  
Mechanical Ventilation ◽  
Detection Rate ◽  
Pathogenic Bacteria ◽  
Nursing Intervention ◽  
Apache Ii Score ◽  
Control Group ◽  
Study Group ◽  
Ventilator Associated Pneumonia ◽  
Icu Patients ◽  
Mechanical Ventilation Time

Background VAP is a common complication of ventilator maintenance therapy. The occurrence of VAP is related to many factors such as long duration of breathing, invasive operation, pollution of respiratory tubes and instruments, and low immunity of patients. The prevention of VAP in critically ill patients I the primary problem for clinical medical staff. Avoiding exogenous bacteria invading the respiratory tract and endogenous bacterial infection is the main method. Objective To investigate the value of optimized cluster nursing intervention combined with targeted nursing measures in reducing the incidence of ventilator-associated pneumonia (VAP) in patients with mechanical ventilation in intensive care unit (ICU). Methods 200 patients with mechanical ventilation in ICU of our institute from January 2017 to June 2020 were selected and randomly divided into study group and control group, with 100 cases in each group. The study group was treated with cluster nursing intervention combined with targeted nursing measures optimized by muItL criteria decision analysis method, and the control group was treated with targeted nursing measures. The incidence of VAP, the detection rate of pathogenic bacteria in sputum specimens and the effect of nursing execution were compared between the two groups. 200 patients were divided into VAP group and non-VAP group according to whether VAP occurred. Multivariate Logistic regression model analysis was used to explore the risk factors of VAP in AECOPD patients. Results A total of 4 strains were detected in the study group and 18 strains were detected in the control group. The detection rate of pathogenic bacteria in the study group was higher than that in the control group (y2=10.010, P=0.002<0.05). The incidence of VAP in the study group was 4.00% lower than 17.00% in the control group, and the difference was statistically significant (P<0.05). Compared with VAP group and non-VAP group, the proportion of patients with serum albumin<30g/L, diabetes mellitus rate, APACHE II score>15 points, tracheotomy rate and mechanical ventilation time≥5 days in VAP group were significantly higher than those in non-VAP group, which had statistical significance (P<0.05). The results of logistic regression model snowed that serum albumin ≥30g/L and optimized cluster nursing could effectively reduce the risk of VAP in ICU patients with mechanical ventilation (P<0.05). The risk of VAP in ICU patients with mechanical ventilation was increased by the combination of diabetes rate. APACHE II score≥15 points, tracheotomy and mechanical ventilation time ≥ 5 days (P<0.05). Conclusion The risk of VAP in ICU patients with mechanical ventilation is high, and the optimized cluster nursing intervention combined with targeted nursing measures can effectively reduce the incidence of VAP.

scholarly journals A Novel Framework for Anomaly Detection for Satellite Momentum Wheel Based on Optimized SVM and Huffman-Multi-Scale Entropy

Entropy ◽  
2021 ◽  
Vol 23 (8) ◽  
pp. 1062
Author(s):  
Yuqing Li ◽  
Mingjia Lei ◽  
Pengpeng Liu ◽  
Rixin Wang ◽  
Minqiang Xu
Keyword(s):  
Anomaly Detection ◽  
Detection Rate ◽  
Recognition Accuracy ◽  
Simulation Models ◽  
Physical Models ◽  
Telemetry Data ◽  
Data Types ◽  
Multi Scale ◽  
Svm Model ◽  
The Time Domain

The health status of the momentum wheel is vital for a satellite. Recently, research on anomaly detection for satellites has become more and more extensive. Previous research mostly required simulation models for key components. However, the physical models are difficult to construct, and the simulation data does not match the telemetry data in engineering applications. To overcome the above problem, this paper proposes a new anomaly detection framework based on real telemetry data. First, the time-domain and frequency-domain features of the preprocessed telemetry signal are calculated, and the effective features are selected through evaluation. Second, a new Huffman-multi-scale entropy (HMSE) system is proposed, which can effectively improve the discrimination between different data types. Third, this paper adopts a multi-class SVM model based on the directed acyclic graph (DAG) principle and proposes an improved adaptive particle swarm optimization (APSO) method to train the SVM model. The proposed method is applied to anomaly detection for satellite momentum wheel voltage telemetry data. The recognition accuracy and detection rate of the method proposed in this paper can reach 99.60% and 99.87%. Compared with other methods, the proposed method can effectively improve the recognition accuracy and detection rate, and it can also effectively reduce the false alarm rate and the missed alarm rate.

scholarly journals Effects of early unilateral mandibular first molar extraction on condylar and ramal vertical asymmetry

2014 ◽  
Vol 08 (02) ◽  
pp. 178-183 ◽  
Author(s):  
Koray Halicioglu ◽  
Mevlut Celikoglu ◽  
Suleyman K. Buyuk ◽  
Ahmet E. Sekerci ◽  
Celal Candirli
Keyword(s):  
Asymmetry Index ◽  
T Test ◽  
Control Group ◽  
Missing Teeth ◽  
Anterior Crowding ◽  
Mandibular Asymmetry ◽  
Group I ◽  
Student’S T ◽  
Mandibular First Molar ◽  
Student’S T Test

ABSTRACT Objective: The objective of the following study is to investigate the mandibular vertical asymmetry in a group of patients with early unilateral mandibular first molar extractions. Materials and Methods: Mandibular asymmetry index measurements (condylar, ramal and condylar-plus-ramal) were performed on the panoramic radiographs of a study group including 51 patients (mean age: 18.60 ± 1.11 years) and a control group of 51 patients (mean age: 18.53 ± 1.29 years). Group I included patients with a unilateral mandibular first molar extracted before the age of 12 years. Group II included patients with no extractions and had excellent Class I relationships, no missing teeth and slight or moderate anterior crowding. A paired t-test was used to determine possible statistically significant differences between the sides for the measurements. Student's t-test was used for the comparison of asymmetry index values between the groups and genders. Results: No group showed statistically significant sex-or side-specific differences for posterior vertical height measurements. Condylar asymmetry index and ramal asymmetry index measurements were not statistically different between the groups, while condylar-plus-ramal asymmetry index (CRAI) measurements were statistically different between the groups (P = 0.019). Conclusions: A slight difference for CRAI value was found in patients with early unilateral mandibular first molar extractions.

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