TIME OF CONCENTRATION IN AN EXPERIMENTAL BASIN: METHODS FOR ANALYSIS, BACKWATER EFFECTS AND VEGETATION REMOVAL

There are several empirical and theoretical formulas used for the estimation of the time of concentration (Tc). However, it has been shown that the Tc estimation may vary in several orders of magnitude depending on the method. In this study we compare 10 different methods for the estimation of the Tc using sub-basins and backwater effects to analyze those results. We also analyzed if the vegetation removal changes the Tc in the basin. The study area is the basin of the Federal University of Santa Catarina (UFSC) campus in Joinville with a significant part in a wetland and there is backwater effect caused by the Piraí river. Applying the empirical and theoretical equations found a significant variation of Tc estimates, the standard deviation in relation to the general average was around 65%. The influence of vegetation removal and drainage of a canal had an effect of reducing the Tc by 50%.

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Sustainable Learning Levels of High School Students

Discourse and Communication for Sustainable Education ◽

10.2478/dcse-2019-0006 ◽

2019 ◽

Vol 10 (1) ◽

pp. 63-80

Author(s):

Menekşe Eskici

Keyword(s):

High School ◽

High School Students ◽

Standard Deviation ◽

Significant Variation ◽

Arithmetic Mean ◽

Female Students ◽

School Students ◽

Cognitive Subscale ◽

Academic Year ◽

One Way Anova

Abstract The aim of this study was to determine sustainable learning levels of students. The study also attempted to determine sustainable learning levels of students based on gender and grade. The participants of the study consisted of 742 high school students (354 females and 388 males) in various high schools in Babaeski district of Kırklareli, Turkey during the 2017–2018 academic year. In order to collect data, a scale with two subscales – behavioural and cognitive – was developed. The data were analysed through SPSS 17, and arithmetic mean, standard deviation, t-test and one-way analysis of variance (One Way Anova) were used. According to the results of the study, it is concluded that sustainable learning level of the high school students is moderate. The study also found a significant variation in favour of the female students in “learning for development” subdimension on the cognitive subscale of the scale.

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Input Availability and Use under Poultry Import Prohibition: A study of Southeast Nigeria

Agricultura tropica et subtropica ◽

10.1515/ats-2015-0003 ◽

2015 ◽

Vol 48 (1-2) ◽

pp. 18-23

Author(s):

Jane Munonye ◽

Chinedum Nwajiuba ◽

Christopher Eze

Keyword(s):

Standard Deviation ◽

Trend Analysis ◽

Significant Variation ◽

Mean Value ◽

Poultry Feed ◽

Poultry Production ◽

Major Constraint ◽

Time Period ◽

The Mean ◽

Broad Objective

Abstract The broad objective of the study is to examine input availability and use under poultry import prohibition in southeast Nigeria from 1994-2009. The specific objectives include: to determine whether there is increased demand for poultry feed, drugs and day old chicks before and since the ban; to determine the effect of input supplied on domestic poultry production. The study adopted trend analysis of before (1994-2001) and since (2002-2009) the ban to examine the variations in poultry input and supply. Three states were sampled out of the five states that made up the zone. Data were collected through the use of a questionnaire. A total of sixty respondents were used, 20 persons each from the three states selected. The results showed that feed demanded has a mean value of 141.75 tons before the ban and 82.19 tons since the ban indicated a decrease in demand for feed. While day-old chicks demanded has a mean value of 310.47 birds before the ban and 466.3 birds since the ban indicated an increase in the demand for day-old chicks. The mean value of Drugs was 266.7 grams before the ban and 299.3 grams since the ban, indicating an increase in demand for drugs. There was also a significant variation in the standard deviation and also in both maximum and minimum values over the time period in feed, day-old chicks and drugs. The major constraint is input availability. The study concluded that there was an increase in demand for day old chicks since the ban.

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DIFFERENTIATION IN THE SOCIAL DEVELOPMENT OF RURAL AREAS

Russian Journal of Management ◽

10.29039/2409-6024-2021-9-3-31-35-1 ◽

2021 ◽

Vol 9 (3) ◽

pp. 31-35

Author(s):

Igor' Van'kov

Keyword(s):

Standard Deviation ◽

Rural Development ◽

Social Development ◽

Rural Areas ◽

Significant Variation ◽

Mean Value ◽

Asymmetry Coefficient ◽

Integrated Development ◽

The Social ◽

Statistical Indicators

The article analyzes the dynamics of social and engineering development of rural areas, including during the implementation of the state program "Integrated Development of Rural Territories." It was concluded that the allocated funds were insufficient, the annual value of which is 0.44% of the need. Differentiation in the development of rural areas by region is shown using statistical indicators: mean value, me-diana, standard deviation, asymmetry coefficient, excession, variation, span. Due to the fact that indicators have a significant variation, it is recommended to use the median values of indicators in assessing rural development.

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Nucleic Acid Molecules Prepared by Monolayer Techniques

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100094140 ◽

1972 ◽

Vol 30 ◽

pp. 178-179

Author(s):

Dimitrij Lang

Keyword(s):

Electron Microscopy ◽

Standard Deviation ◽

Nucleic Acid ◽

Cytochrome C ◽

Nucleic Acids ◽

Contour Length ◽

Sample Standard Deviation ◽

Molecular Weights ◽

Length Measurements ◽

Protein Monolayer

The success of the protein monolayer technique for electron microscopy of individual DNA molecules is based on the prevention of aggregation and orientation of the molecules during drying on specimen grids. DNA adsorbs first to a surface-denatured, insoluble cytochrome c monolayer which is then transferred to grids, without major distortion, by touching. Fig. 1 shows three basic procedures which, modified or not, permit the study of various important properties of nucleic acids, either in concert with other methods or exclusively:1) Molecular weights relative to DNA standards as well as number distributions of molecular weights can be obtained from contour length measurements with a sample standard deviation between 1 and 4%.

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Reliability of the Minimum Masking Level as Outcome Variable in Tinnitus Clinical Research

American Journal of Audiology ◽

10.1044/2020_aja-20-00047 ◽

2020 ◽

Vol 29 (3) ◽

pp. 429-435

Author(s):

Patricia C. Mancini ◽

Richard S. Tyler ◽

Hyung Jin Jun ◽

Tang-Chuan Wang ◽

Helena Ji ◽

...

Keyword(s):

Standard Deviation ◽

High Frequency ◽

Pearson Correlation ◽

Correlation Coefficients ◽

Outcome Variable ◽

Reliable Estimate ◽

Moderate Correlation ◽

Trained Subjects ◽

The Relationship ◽

Minimum Intensity

Purpose The minimum masking level (MML) is the minimum intensity of a stimulus required to just totally mask the tinnitus. Treatments aimed at reducing the tinnitus itself should attempt to measure the magnitude of the tinnitus. The objective of this study was to evaluate the reliability of the MML. Method Sample consisted of 59 tinnitus patients who reported stable tinnitus. We obtained MML measures on two visits, separated by about 2–3 weeks. We used two noise types: speech-shaped noise and high-frequency emphasis noise. We also investigated the relationship between the MML and tinnitus loudness estimates and the Tinnitus Handicap Questionnaire (THQ). Results There were differences across the different noise types. The within-session standard deviation averaged across subjects varied between 1.3 and 1.8 dB. Across the two sessions, the Pearson correlation coefficients, range was r = .84. There was a weak relationship between the dB SL MML and loudness, and between the MML and the THQ. A moderate correlation ( r = .44) was found between the THQ and loudness estimates. Conclusions We conclude that the dB SL MML can be a reliable estimate of tinnitus magnitude, with expected standard deviations in trained subjects of about 1.5 dB. It appears that the dB SL MML and loudness estimates are not closely related.

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Bedingungen für den Erfolg übergewichtiger und adipöser Kinder in einem ambulanten Programm zur Gewichtsreduktion durch Veränderungen des Lebensstils

Zeitschrift für Kinder- und Jugendpsychiatrie und Psychotherapie ◽

10.1024/1422-4917/a000059 ◽

2010 ◽

Vol 38 (5) ◽

pp. 351-360 ◽

Cited By ~ 1

Author(s):

Wilfried Pott ◽

Georg Fröhlich ◽

Özgür Albayrak ◽

Johannes Hebebrand ◽

Ursula Pauli-Pott

Keyword(s):

Body Mass Index ◽

Standard Deviation ◽

Body Mass ◽

Standard Deviation Score ◽

Psychische Belastung ◽

Deviation Score ◽

Höheres Alter

Fragestellung: Es wurde der Frage nachgegangen, ob sich erfolgreiche Teilnehmer eines ambulanten familienzentrierten Gewichtskontrollprogramms durch spezifische familiäre und psychologische Charakteristiken auszeichnen. Einbezogen wurden die psychosoziale Risikobelastung der Familie, Depressivität und Bindungsstil der Hauptbezugsperson, der Body mass index (BMI) und der BMI-Standardabweichungswert («Standard deviation score», SDS) des teilnehmenden Kindes und der Familienmitglieder sowie die individuelle psychische Belastung des teilnehmenden Kindes. Methodik: Die Daten wurden per Interview und Fragebogen vor dem Behandlungsbeginn erhoben. Von 136 in das Programm aufgenommenen übergewichtigen und adipösen Kindern zwischen 7 und 15 Jahren beendeten 116 das 12-monatige Interventionsprogramm. Von diesen zeigten 100 (85,3 %) eine Reduktion des BMI-SDS und 79 (68.1 %) eine mehr als 5 %ige Reduktion des BMI-SDS. Diese «erfolgreichen» Kinder wurden mit 56 «nicht erfolgreichen» (Abbrecher und Kinder mit einer 5 %igen oder geringeren Reduktion des BMI-SDS) verglichen. Ergebnisse: Nicht erfolgreiche Kinder unterschieden sich von den erfolgreichen durch ein höheres Alter, eine höhere psychosoziale Risikobelastung, Depressivität und einen vermeidenden Bindungsstil der Mutter sowie durch das Vorhandensein adipöser Geschwister. In einer logistischen Regressionsanalyse zeigten sich mütterliche Depressivität und das Vorhandensein adipöser Geschwister als beste und voneinander unabhängige Prädiktoren. Schlussfolgerungen: Um die spezifischen Bedürfnisse der Familien zu erfüllen und einen Misserfolg zu verhindern, sollten zusätzliche Programmbausteine zur spezifischen Unterstützung von Jugendlichen mit adipösen Geschwistern und Müttern mit Depressionen und vermeidenden Bindungsstil entwickelt werden. Die Wirksamkeit dieser Module muss dann in weiteren Studien überprüft werden.

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