Statistical Analysis of Homogeneous Systems of Polar Coordinates

1975 ◽  
Vol 26 ◽  
pp. 469
Author(s):  
E. Proverbio ◽  
S. Uras
Keyword(s):  
Statistical Analysis ◽  
Standard Deviation ◽  
Polar Coordinates ◽  
Mean Values ◽  
Homogeneous Systems ◽  
The Mean

AbstractIn 1972, Proverbio and Quesada compiled a list of seven homogeneous systems of polar coordinates expressed in tenths of years adopted by different authors. In the paper, the authors try to determine the internal correlation of the different systems of coordinates so as to represent the precision of each series for different frequency ranges. The analysis of the standard deviation of the raw residuals of the differences between the coordinates of each series and the mean values from the smoothed curve of the residuals provided further information about the accuracy of the same series of polar coordinates.

scholarly journals Classification and Statistical Trend Analysis in Detecting Glaucomatous Visual Field Progression

2019 ◽  
Vol 2019 ◽  
pp. 1-5
Author(s):  
Cristiana Valente ◽  
Elisa D’Alessandro ◽  
Michele Iester
Keyword(s):  
Statistical Analysis ◽  
Standard Deviation ◽  
Visual Field ◽  
Trend Analysis ◽  
Open Angle Glaucoma ◽  
Mean Deviation ◽  
Threshold Strategy ◽  
Visual Field Progression ◽  
The Mean

Aim. To evaluate the agreement between different methods in detection of glaucomatous visual field progression using two classification-based methods and four statistical approaches based on trend analysis. Methods. This is a retrospective and longitudinal study. Twenty Caucasian patients (mean age 73.8 ± 13.43 years) with open-angle glaucoma were recruited in the study. Each visual field was assessed by Humphrey Field Analyzer, program SITA standard 30-2 or 24-2 (Carl Zeiss Meditec, Inc., Dublin, CA). Full threshold strategy was also accepted for baseline tests. Progression was analyzed by using Hodapp–Parrish–Anderson classification and the Advanced Glaucoma Intervention Study visual field defect score. For the statistical analysis, linear regression (r2) was calculated for mean deviation (MD), pattern standard deviation (PSD), and visual field index (VFI), and when it was significant, each series of visual field was considered progressive. We also used Progressor to look for a significant progression of each visual field series. The agreement between methods, based on statistical analysis and classification, was evaluated using a weighted kappa statistic. Results. Thirty-eight visual field series were analyzed. The mean follow-up time was 6.2 ± 1.53 years (mean ± standard deviation). At baseline, the mean MD was −7.34 ± 7.18 dB; at the end of the follow-up, the mean MD was −9.25 ± 8.65 dB; this difference was statistically significant (p<0.001). The agreement to detect progression was fair between all methods based on statistical analysis and classification except for PSD r2. A substantial agreement (κ = 0.698 ± 0.126) was found between MD r2 and VFI r2. With the use of all the statistical analysis, there was a better time-saving. Conclusions. The best agreement to detect progression was found between MD r2 and VFI r2. VFI r2 showed the best agreement with all the other methods. GPA2 can help ophthalmologists to detect glaucoma progression and to help in treatment decisions. PSD r2 was the worse method to detect progression.

scholarly journals The Effect of Re-engineering of Administrative Processes in Achieving the Competitive Advantage of Sustainable in Five-Star Hotels in Jordan - Field Study

2019 ◽  
Vol 11 (1) ◽  
pp. 96
Author(s):  
Suleiman Mustafa EL-Dalahmeh
Keyword(s):  
Information Technology ◽  
Statistical Analysis ◽  
Standard Deviation ◽  
Competitive Advantage ◽  
Organizational Communication ◽  
Sustainable Competitive Advantage ◽  
Statistical Effect ◽  
The Mean ◽  
Level Of Significance ◽  
Very High

The main aim of the research was to identify the effect of Re-engineering of Administration Processes in Achieving the competitive Advantage of Sustainable in Five Star Hotels in Jordan. To achieve the objective of this study, a questionnaire distributed on 120 persons in Five Star Hotels in Jordan. 90 returned with a rate of 75%. The results of the study showed that there is a significant statistical effect at the level of significance of α ≤ 0.05 for the re - engineering of administrative processes in achieving sustainable competitive advantage in five - star hotels in Jordan in the following dimensions:* - Leadership * - Ability to analyze * - Advanced design * - Organizational communication * - Continuous improvementStrategic Planning. The total score of the mean of the study instrument was 4.43 and with a standard deviation of 0.35 and 88.6% at a very high degree.The results of the statistical analysis revealed the realization of the sample of the study in the investigated hotels, the extent of the effect of re-engineering the administrative processes in all its dimensions in achieving the competitive advantage.Based on the results of hypotheses tested, the six null hypotheses of the study were rejected. In the light of the findings, the researcher recommended that:1- The need to convince the management of hotels and hotel staff the importance of the application of re-engineering of administrative processes to achieve competitive advantage sustainable2- Utilizing the potential of graduates of new universities from the faculties of economics, administrative sciences and information technology. 

scholarly journals Applications of BMI or BSI: Differences and Revisions According to Age and Height

2010 ◽  
Vol 2010 ◽  
pp. 1-9
Author(s):  
Otto W. B. Schult ◽  
Ludwig E. Feinendegen ◽  
Stephan Zaum ◽  
Walton W. Shreeve ◽  
Richard N. Pierson
Keyword(s):  
Statistical Analysis ◽  
Least Squares ◽  
Body Mass ◽  
Body Height ◽  
Normal Weight ◽  
Mean Values ◽  
The Mean

Validation of body-mass relationships requires a careful statistical analysis of data of normal weight individuals. BMI (ratio between body mass and square of body height) and BSI values (ratio between mass and cube of body height) have been calculated for 99 persons with ages between 1 day and 76 years. These BMI or BSI values have been used for least squares fits yielding mean BMI or BSI values, their variances (providing precision), and average deviations of individual BMI/BSI values from the BMI/BSI means. The latter allows limits to over- and underweight. For adults we found mean values of BSI of 12.36 and confirmed 21.7 for the mean BMI; but the BSI was 1.4 times more precise than the BMI. For children shorter than 1.3 m and younger than 8 years we found the BMI average of 15.9 and over-/underweight limits of 17.4/14.4 being significantly smaller than and incompatible with the recommended BMI values.

scholarly journals Width of attached gingiva in an Indian population: A descriptive study

1970 ◽  
Vol 8 (3) ◽  
pp. 64-67
Author(s):  
Jacob P Shaju ◽  
RM Zade
Keyword(s):  
Statistical Analysis ◽  
Indian Population ◽  
Normal Values ◽  
Descriptive Study ◽  
Medical Sciences ◽  
Mean Values ◽  
Healthy State ◽  
Attached Gingiva ◽  
The Mean ◽  
Descriptive Statistical Analysis

Objectives: Attached gingiva is important for maintaining periodontium in a healthy state. The present study tries to find the normal values of width of attached gingiva in a periodontally healthy Indian population. Material and Methods: The width of attached gingiva was measured with a periodontal probe in periodontally healthy patients attending the periodontics department. Descriptive statistical analysis was done to get the mean, which will represent the normal values of width of attached gingiva for the population. Results: Female patients had a greater width than males and the 20 to 30 year old group had the greatest width of attached gingiva. The mean values of attached gingiva varied in different areas of the mouth with greatest width in maxillary central incisors and least in mandibular molars. Conclusion: Width of attached gingiva varies with age, gender and in different areas of the mouth. Key words: Periodontium, gingiva, health DOI: 10.3329/bjms.v8i3.3985 Bangladesh Journal of Medical Sciences Vol.8(3) 2009 p64-67

scholarly journals Terapi psikoreligi terhadap penurunan perilaku kekerasan pada pasien Skizofrenia di ruang rawat inap Rumah Sakit Jiwa Daerah Provinsi Lampung

2020 ◽  
Vol 13 (4) ◽  
pp. 373-380
Author(s):  
Teguh Pribadi ◽  
Djunizar Djamaludin
Keyword(s):  
Statistical Analysis ◽  
Standard Deviation ◽  
Mental Hospital ◽  
Violent Behavior ◽  
Hospital Management ◽  
P Value ◽  
Spiritual Power ◽  
Research Instrument ◽  
Inpatient Ward ◽  
The Mean

Psycho-religious therapy in reducing violent behavior among   patients  with  SchizophreniaBackground: The main problem that often occurs to patients with schizophrenia is violent behavior. Violent behavior is a state in which a person performs a physically harmfulserve to himself or to another person. Psychoreligious therapy is a therapy that is usually through a religiousreligion approach such as client believed according their riligion   and tends to touch the spiritual side of man and also rather to awaken the spiritual power against of with illness. Data reported to Lampung Mental Hospital, the trend  number of violent behavior  was increasing and data in 2018 as many as 194 patients with violent behavior.Purpose: Knowing effectiveness of psycho-religious therapy in reducing violent behavior among patients with schizophrenia Lampung Mental Hospital 2019Methods: A quantitative and quasi experiment with two group pretest postest design. the population of this study were all patients with violent behavior in the inpatient ward of Lampung mental hospital as many as 30 patients. this research instrument used observation sheet. statistical analysis used t dependent tests.Result: Finding the mean score of violent behavior behavior before psychoreligious therapy were of 16.87 with a standard deviation of 1.46, and after psycho religious  therapy was 13.0 with a standard deviation of 1.0.Conclusion: There was an influence of psycho religious therapy in reducing violent behavior inpatients with schizophrenia (p value 0,000).Suggestion: The hospital management to apply psychoreligious therapy programs to patients with  schizophrenia specially patients has risk of violent behaviorKeywords: Psychoreligious Therapy; Violence Behavior; SchizophreniaPendahuluan: Permasalahan utama yang sering terjadi pada pasien Skizofrenia adalah perilaku kekerasan. Perilaku kekerasan adalah suatu keadaan dimana seseorang melakukan tindakan yang membahayakan secara fisik, baik kepada diri sendiri, maupun orang lain. Terapi psikoreligius adalah terapi yang biasanya melalui pendekatan  keagamaan yang dianut oleh klien dan cenderung untuk menyentuh sisi  spiritual manusia, untuk membangkitkan kekuatan spiritual dalam menghadapi penyakit yang dideritanya  Dari data yang diperoleh dari Rumah Sakit Jiwa Daerah Provinsi Lampung jumlah pasien dengan prilaku kekerasan  cenderung meningkat dan data di tahun 2018 sebanyak 194 pasien dengan perilaku kekerasan.Tujuan: Mengetahui pengaruh terapi psikoreligi terhadap penurunan perilaku kekerasan pada pasien skizopfrenia di ruang rawat inap  Rumah Sakit Jiwa Daerah  Provinsi Lampung Tahun 2019.Metode: Penelitian kuantitatif menggunakan Quasi Eksperiment dengan two group pretest postest. Populasi dan sampelnya seluruh pasien dengan perilaku kekerasan di Ruang Rawat Inap Rumah Sakit Jiwa Daerah Provinsi Lampung  sebanyak 30 pasien. Instrumen penelitian ini menggunakan lembar observasi. Analisastatistik yang digunakan yaitu uji t Dependen.Hasil: Didapatkan nilai rata-rata skor perilaku kekerasan Sebelum Terapi psikoreligi adalah 16,87 dengan standar deviasi 1,46, rata-rata Skor perilaku kekerasan sesudah Terapi psikoreligi adalah 13.0 dengan standar deviasi 1,0.Simpulan: Ada pengaruh terapi psikoreligi terhadap penurunan perilaku kekerasan pada pasien skizopfrenia di Ruang Rawat Inap  Rumah Sakit Jiwa Daerah  Provinsi Lampung Tahun 2019 (p value 0,000).Saran: Ditujukan kepada pihak manajemen rumah sakit agar menerapakan program terapi psikoreligius pada pasien schizophrenia dengan perilaku kekerasan.

scholarly journals Statistical Analysis of Basketball Teams Through Normal Distribution and R Programming

2020 ◽  
Vol 4 (9) ◽  
Author(s):  
Megan Wang
Keyword(s):  
Statistical Analysis ◽  
Standard Deviation ◽  
Probability Density Function ◽  
Normal Distribution ◽  
Sports Analytics ◽  
R Programming Language ◽  
General Improvement ◽  
The Mean ◽  
R Programming ◽  
Two Parameters

Basketball has existed for almost 130 years, becoming one of the most famous sports worldwide by affecting millions of lives and having national and global tournaments. With the general improvement of people's concern and love for sports competition, sports analytics’ role will become more prominent. Hence, this paper combines the relevant knowledge of statistics and typical basketball competition cases from NBA, expounding the application of statistics in sports competition. The paper first examines the importance of normal distribution (also called Gaussian distribution) in statistics through its probability density function and the function's graph. The function has two parameters: the mean for the maximum and standard deviation for the distance away from the mean[1]. By compiling datasets of past teams and individuals for their basketball performances and making simple calculations of their standard deviation and mean, the paper constructs normal distribution graphs using the R programming language. Finally, the paper examines the Real Plus-Minus value and its importance in basketball.

scholarly journals AUTOMATIC FAULT RECOGNITION OF PHOTOVOLTAIC MODULES BASED ON STATISTICAL ANALYSIS OF UAV THERMOGRAPHY

2017 ◽  
Vol XLII-2/W6 ◽  
pp. 179-182 ◽  
Author(s):  
D. Kim ◽  
J. Youn ◽  
C. Kim
Keyword(s):  
Statistical Analysis ◽  
Standard Deviation ◽  
Fault Detection ◽  
Thermal Infrared ◽  
Measured Temperature ◽  
Infrared Sensor ◽  
Mean Intensity ◽  
Detection Rule ◽  
The Mean ◽  
Local Detection

As a malfunctioning PV (Photovoltaic) cell has a higher temperature than adjacent normal cells, we can detect it easily with a thermal infrared sensor. However, it will be a time-consuming way to inspect large-scale PV power plants by a hand-held thermal infrared sensor. This paper presents an algorithm for automatically detecting defective PV panels using images captured with a thermal imaging camera from an UAV (unmanned aerial vehicle). The proposed algorithm uses statistical analysis of thermal intensity (surface temperature) characteristics of each PV module to verify the mean intensity and standard deviation of each panel as parameters for fault diagnosis. One of the characteristics of thermal infrared imaging is that the larger the distance between sensor and target, the lower the measured temperature of the object. Consequently, a global detection rule using the mean intensity of all panels in the fault detection algorithm is not applicable. Therefore, a local detection rule based on the mean intensity and standard deviation range was developed to detect defective PV modules from individual array automatically. The performance of the proposed algorithm was tested on three sample images; this verified a detection accuracy of defective panels of 97&amp;thinsp;% or higher. In addition, as the proposed algorithm can adjust the range of threshold values for judging malfunction at the array level, the local detection rule is considered better suited for highly sensitive fault detection compared to a global detection rule.

scholarly journals Fourth ventricle computed tomography indexes: standardisation and characteristics in neurocysticercosis

2002 ◽  
Vol 60 (2A) ◽  
pp. 211-218 ◽  
Author(s):  
Svetlana Agapejev
Keyword(s):  
Computed Tomography ◽  
Standard Deviation ◽  
Fourth Ventricle ◽  
Control Group ◽  
Mean Values ◽  
Lateral Ventricles ◽  
The Mean ◽  
Ventricular Shunting

OBJECTIVES: to propose standardisation of fourth ventricle dimensions and to study its characteristics in neurocysticercosis. METHOD: a control group (CG) constituted by 114 individuals with normal CT, and 80 patients with neurocysticercosis composed the group with neurocysticercosis (GN). Measures of the inner cranial diameter (Cr), fronto-polar distance between both lateral ventricles (FP), antero-posterior (AP) and latero-lateral (LL) fourth ventricle width based the standardisation of six indexes. RESULTS: AP/Cr, AP/LL and AP/FP were the more discriminative indexes, presenting in CG the mean values of 0.063, 0.267 and 0.582, respectively. The indexes in GN had values statistically higher than in CG. From GN, 51patients had increased indexes values above 2 standard deviation of the CG mean. AP/Ll was > or = 1 in 95% of patients with ventricular shunting and in 88% with depression. It also occurred in 73% patients with satisfactory follow-up and in everybody who died. CONCLUSION: AP/Cr, AP/LL and AP/FP may represent fourth ventricle dimensions.

scholarly journals Comparison of Four Radiographic Angular Measures of Lumbar Lordosis

2018 ◽  
Vol 09 (03) ◽  
pp. 298-304 ◽  
Author(s):  
Francis Osita Okpala
Keyword(s):  
Standard Deviation ◽  
Lumbar Lordosis ◽  
Joint Angle ◽  
Mean Values ◽  
Normal Individuals ◽  
Wide Range ◽  
Normal Mean ◽  
The Mean ◽  
Range Of Values

ABSTRACT Background: Several attempts (radiographic and nonradiographic) have been made to measure the lumbar lordosis (LL), but the results differ substantially as investigators have used different parameters. Radiography is the gold standard, and the methods include lumbosacral angle (LSA), lumbosacral joint angle (LSJA), Cobb angle, and tangential radiologic assessment of LL (TRALL) angle. The traditional method, the Cobb technique, has a wide range of normal mean values, with a large standard deviation. Using a more reliable radiographic angle will hopefully simply and standardize LL measurement in the diagnosis, treatment, and follow-up of patients. Aim: To compare in normal individuals with fully developed LL the LSA, LSJA, TRALL, and Cobb angles, by determining (a) if any correlation exists between them and (b) the most reliable measures of LL, based on, least (i) number of measurement lines, (ii) range of values, (iii) mean, (iv) standard deviation, and (v) variance. Materials and Methods: The four angles were retrospectively measured in each supine lateral lumbosacral radiograph of 100 males and 100 females, aged 15 years and above. Data were analyzed with IBM SPSS Statistics 23.0 (NY, USA); P < 0.05 was considered statistically significant. Results: No correlation existed between the mean values of the four angles, and in each angle, there was no male-versus-female correlation. LSJA had the best reliability criteria for LL measurement. Conclusion: The mean LSA, LSJA, TRALL, and Cobb angles have no significant Pearson's correlation, and of the four angular measures of LL, LSJA was the most reliable.

Statistical analysis of wind resource and energy potential assessment of Quaidabad site, Sindh Pakistan

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zahid Hussain Hulio ◽  
Gm Yousufzai ◽  
Wei Jiang
Keyword(s):  
Standard Deviation ◽  
Wind Speed ◽  
Energy Density ◽  
Wind Shear ◽  
Economic Assessment ◽  
Energy Potential ◽  
Content Type ◽  
Mean Values ◽  
The Mean ◽  
Wind Resource

Purpose Pakistan is an energy starving country that needs continuous supply of energy to keep up its economic speed. The aim of this paper is to assess the wind resource and energy potential of Quaidabad site for minimizing the dependence on fuels and improving the environment. Design/methodology/approach The Quaidabad site wind shear coefficient and turbulence intensity factor are investigated. The two-parameter k and c Weibull distribution function is used to analyze the wind speed of site. The standard deviation of the site is also assessed for a period of a year. The wind power density and energy density are assessed for a period of a year. The economic assessment of energy/kWh is investigated for selection of appropriate wind turbine. Findings The mean wind shear coefficient was observed to be 0.2719, 0.2191 and 0.1698 at 20, 40 and 60 m, respectively, for a period of a year. The mean wind speed is found to be 2.961, 3.563, 3.907 and 4.099 m/s at 20, 40, 60 and 80 m, respectively. The mean values of k parameters were observed to be 1.563, 2.092, 2.434 and 2.576 at 20, 40, 60 and 80 m, respectively, for a period of a year. The mean values of c m/s parameter were found to be 3.341, 4.020, 4.408 and 4.625 m/s at 20, 40, 60 and 80 m, respectively, for a period of a year. The major portion of values of standard deviation was found to be in between 0.1 and 2.00 at 20, 40, 60 and 80 m. The wind power density (W/m2) sum total values were observed to be 351, 597, 792 and 923 W/m2 at 20, 40, 60 and 80 m, respectively, for a period of a year. The mean coefficient of variation was found to be 0.161, 0.130, 0.115 and 0.105 at 20, 40, 60 and 80 m, respectively. The sum total energy density was observed to be 1,157, 2,156, 2,970 and 3,778 kWh/m2 at 20, 40, 60 and 80 m, respectively. The economic assessment is showing that wind turbine E has the minimum cost US$0.049/kWh. Originality/value The Quaidabad site is suitable for installing the utility wind turbines for energy generation at the lowest cost.

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