scholarly journals Oedometer tests - an aid in determination of the geological load history?

1996 ◽  
Vol 43 ◽  
pp. 41-50
Author(s):  
Grete Thorsen
Keyword(s):  
Effect Of Temperature ◽  
Test Results ◽  
Load History ◽  
Ice Caps ◽  
Preconsolidation Pressure ◽  
Significant Difference ◽  
Model Set ◽  
Set Up ◽  
Oedometer Tests

The paper describes the results of oedometer tests carried out with samples from Eemian fresh-water deposits and the methods used to determine the preconsolidation pressure from the test results. The influence of creep in the material on the apparent preconsolidation pressure is estimated from a model set up by Moust Jacobsen in 1992. The test results do not show any significant difference in the determined values of the overconsolidation ratio (OCR) for the samples from Hollerup and SolsØ, east and west of the main stationary line for the last ice sheet in Weichselian, respectively. The results, however, te11 nothing about the kind of actions, which has caused the overconsolidation. The determined OCR-values might be due to previous ice caps but a big difference in the two values from Solso indicates a considerable influence from other actions. The sediments from Hollerup and SolsØ are not identical, and the effect of temperature, chemical and biological processes on the apparent preconsolidation pressure has not been evaluated.

scholarly journals Determination of simethicone in different drug formulations by gravimetry and comparison with the FTIR method

2020 ◽  
Vol 14 (2) ◽  
pp. 153-159
Author(s):  
Muge Guleli ◽  
Sezin İşsev ◽  
Cem Caliskan ◽  
Mahmut Ozbek
Keyword(s):  
Fourier Transform ◽  
Gastrointestinal Tract ◽  
Ftir Spectroscopy ◽  
Gravimetric Method ◽  
T Test ◽  
Test Results ◽  
Drug Formulations ◽  
Significant Difference ◽  
Quantification Analysis

Fourier transform infrared (FTIR) spectroscopy was mostly used in both pharmacopeia and literature studies to determine the assay of simethicone (SMT) in pharmaceuticals. It should be noted that HPLC is used less frequently. As an alternative to the mentioned methods a new, simple, fast, easy-to-apply and very cheap gravimetric method was developed and validated according to ICH guidance entitled Q2B Validation of Analytical Procedures: Methodology for the quantification analysis of simethicone in different pharmaceutical forms. For the simethicone suspension product provided to alleviate too much gas in the gastrointestinal tract, the simethicone amount was determined both by the validated gravimetric method and by the FTIR method defined in the USP and BP monographs, and the results were within the acceptance criteria. It is emphasized that there is no significant difference between the results of gravimetric and FTIR methods according to the calculated F- and t-test results.

scholarly journals ANALISIS KOMPARATIF PENDAPATAN USAHATANI KENTANG VARIETAS SUPERJOHN DAN VARIETAS GRANOLA L DI DESA PINASUNGKULAN UTARA KECAMATAN MODOINDING

2018 ◽  
Vol 14 (1) ◽  
pp. 125
Author(s):  
Neni ., Nuraeni ◽  
Rine ., Kaunang ◽  
Lorraine W. Th. Sondak
Keyword(s):  
Simple Random Sampling ◽  
Potato Production ◽  
T Test ◽  
Farm Income ◽  
P Value ◽  
Test Results ◽  
Average Income ◽  
Two Samples ◽  
Significant Difference

The objective of this research is to know the comparison of Superjohn varieties and varieties of Granola L in Pinasungkulan Utara Village, Modoinding District. The location of the study was determined purposively (purposive sampling), the determination of the number of samples taken by census (Saturated Sampling) for farmers varieties Granola L as much as 20 farmers and 20 farmers Superjohn varieties taken simple random (Simple Random Sampling). The method of analysis used in this research is the analysis of farm income and komaparatif analysis by using t-test two samples Independent Sample T-test. The results showed that the average income of farmers Superjohn varieties is Rp.70.062.947,00 lower than the average income obtained by farmers varieties Granola L Rp.87.029.058,00. It can be seen that the average income difference between the two varieties is Rp.16.960.111,00. Based on statistical test results with MINITAB Program, the calculation of income per hectare obtained significant value of P-Value of 0.01 at α 5% that is 0,01 < 0,05. This means that H0 is rejected and H1 is tested for the fact that there is a significant difference between Superjohn varieties potato production income and Granola L varieties.

An approach for the determination of the preconsolidation pressure in sensitive clays

1980 ◽  
Vol 17 (3) ◽  
pp. 446-453 ◽  
Author(s):  
S. Leroueil ◽  
J. P. LeBihan ◽  
F. Tavenas
Keyword(s):  
Pore Pressure ◽  
Theoretical Basis ◽  
Axial Stress ◽  
New Method ◽  
One Stage ◽  
Preconsolidation Pressure ◽  
Constant Rate ◽  
Constant Gradient ◽  
Oedometer Tests

The present methods for the determination of the preconsolidation pressure of clays are time consuming and expensive. A new method is proposed in which the clay is loaded in a "one-stage loading" to an axial stress in excess of the estimated preconsolidation pressure. The preconsolidation pressure is determined from the observation of the pore pressure dissipation within a few hours. The theoretical basis of this method is also used to discuss the method of interpreting constant rate of strain and constant gradient oedometer tests.

scholarly journals Investigation of the unfused cross cylinder test as an alternative method for the determination of spherical distance refraction end points

2020 ◽  
Vol 79 (1) ◽  
Author(s):  
Nkalebetja T. Makgaba ◽  
Solani D. Mathebula
Keyword(s):  
Adult Population ◽  
Test Results ◽  
End Points ◽  
Room Illumination ◽  
End Point ◽  
Cylinder Test ◽  
Significant Difference ◽  
Young Adult Population ◽  
The Mean

Background: The duochrome test is commonly used to refine the final sphere in refraction at different stages of a subjective refraction. The unfused cross cylinder test is mainly used to determine the near reading addition with a combination of astigmatic lenses.Aim: To investigate if the unfused cross cylinder test can be adapted for distance in finding the spherical end point for distance prescription.Setting: The study was conducted at an Optometry Clinic, University of Limpopo, South Africa.Methods: Fifty-one non-presbyopic subjects aged between 18 and 25 years were examined. The duochrome and unfused cross cylinder examinations were performed monocularly under normal (bright) and dim room illumination.Results: There was no significant difference in the spherical end point determined with either the duochrome or unfused cross cylinder tests (p ≥ 0.05). The mean spherical end points as determined with the duochrome test were −0.09 ± 0.39 diopre sphere (DS) (range: −0.20 to 0.12 dioptres [D]) in bright room illumination and −0.05 ± 0.38 DS (range: −0.16 D to 0.05 D) in dim illumination. The mean spherical end points for the unfused cross cylinder tests were −0.29 ± 0.39 DS (range: −0.18 D to 0.40 D) and −0.32 ± 0.43 DS (range: –0.44 D to –0.19 D) in room dim illuminations, respectively.Conclusion: The unfused cross cylinder test results as performed in this study may provide an accurate measurement of the spherical end point in a young adult population. We recommend the unfused cross cylinder test to be used in normal (bright) room illumination as an alternative to the duochrome test in the determination of distance refractive error.

scholarly journals PENETAPAN RENDEMEN EKSTRAK DAUN JAMBU MAWAR (Syzygium jambos L. Alston) BERDASARKAN VARIASI KONSENTRASI ETANOL DENGAN METODE MASERASI

2020 ◽  
Vol 2 (3) ◽  
pp. 147-157
Author(s):  
Eka Siswanto Syamsul ◽  
Olanda Anugerah ◽  
Risa Supriningrum
Keyword(s):  
Ethanol Concentration ◽  
Ethanol Extract ◽  
Test Results ◽  
Phytochemical Screening ◽  
Sample Collection ◽  
Syzygium Jambos ◽  
Significant Difference ◽  
Ethanol Extracts ◽  
Guava Leaf

Syzygium jambos is a medicinal plant. This study aims to determine the effect of variations in ethanol concentration on yield of guava leaf extract by maceration method. The research conducted was experimental research. The research phase includes sample collection, determination, manufacture of simplicia, extraction by maceration with variations in ethanol concentration, determination of yield, phytochemical screening and determination of drying losses. Phytochemical screening results showed that 50% of ethanol extracts of positive rose guava contained flavonoids, tannins, saponins and steroids / terpenoids, 70% ethanol and 90% positives contained flavonoids, tannins and steroids / terpenoids. The yield of rose guava ethanol extract was 50% (23.01% ± 0.372), 70% ethanol (21.96% ± 1.181) and 90% ethanol (16.57% ± 0.384). LSD test results showed a significant difference (p <0.05) between the 90% to 50% and 70% groups.

scholarly journals Anthropogenetic variability in the groups of homo- and heterosexually oriented individuals

Genetika ◽  
2015 ◽  
Vol 47 (2) ◽  
pp. 765-776
Author(s):  
Suzana Cvjeticanin
Keyword(s):  
Genetic Variability ◽  
Population Genetic ◽  
Control Group ◽  
Population Genetic Study ◽  
Test Results ◽  
Mean Values ◽  
Significant Difference ◽  
The Mean ◽  
Distribution Type

This population-genetic study compares morphophysiological and genetic variability in a group of homosexually oriented individuals from Serbia (N=96) with control group of heterosexual individuals (N=96) using a test of determination of homozygously recessive characteristics in humans (HRC-test). Results of our study revealed a statistically significant difference in the mean values of genetic homozygosity (control group 5.0+0.2 ; homosexuals 3.4 +0.1 HRCs, out of 20 observed characteristics) the differences in the distribution type, as well as in the variances of presence of specific combinations of such traits. These results suggest a complex polygenic difference between two observed systems. There is no difference in the degree of genetic homozygosity between the genders in each tested group of individuals. However, both homosexually oriented females and males have significantly lower mean values of HRCs compared to female and male heterosexuals.

scholarly journals ANALISIS DROP CALL PADA JARINGAN WIDEBAND CODE-DIVISION MULTIPLE ACCESS (WCDMA) DI CLUSTER RENON

2019 ◽  
Vol 6 (1) ◽  
pp. 44
Author(s):  
I Gusti Ngurah Surya Winata ◽  
Gede Sukadarmika ◽  
Pande Ketut Sudiarta
Keyword(s):  
Data Retrieval ◽  
Test Results ◽  
High Attenuation ◽  
Attenuation Rate ◽  
Significant Difference ◽  
Telecommunications Services ◽  
Set Up ◽  
Coverage Problems ◽  
Code Division Multiple ◽  
Parameter Values

Drop call is an example of a problem that is often experienced by users of voice telecommunications services. From this condition, this riset raises the topic of drop call analysis on WCDMA networks in the Renon cluster (nodeB MYAMIN_CR, AKABA_PL, and BUNDARANRENON_PL). Data retrieval needed (Call Set Up Success Rate (CSSR), Call Drop Ratio (CDR), RSCP and Ec/No) is done by drive test using G-NetTrack Pro software. Based on the analysis of the results of the drive test, there were 10 drop call problems. The problems indentified cause by missing neighbors, handover failure, bad spot, coverage problems and overshoot. Bad spots, coverage problems, and overshoot are the initial causes of missing neighbors and handovers failure. Missing neighbors and handover failure begins with the poor value of RSCP and Ec/No, so that the cellphone will try to do a handover. To analyze the drive test results, drive test data is carried out using Atoll software. From the comparison found extreme conditions resulting from obstacle which cause a significant difference in value between the results of the drive test and simulation. The high attenuation rate drop call location due to the obstacle also results in RSCP and Ec/No values being obtained when measurements in the field are low. The low parameter values of RSCP and Ec / No then cause a drop call.

Determination of Resistance to Abrasive Wear. X. Investigation of the Durability of a Bonded Abrasive Wheel on the Du Pont Machine

1949 ◽  
Vol 22 (1) ◽  
pp. 264-268 ◽  
Author(s):  
R. G. Newton ◽  
J. R. Scott
Keyword(s):  
Abrasive Wear ◽  
Test Results ◽  
Volume Loss ◽  
Abrasive Wheel ◽  
Abrasive Particles ◽  
Significant Difference ◽  
Statistical Planning ◽  
The Mean ◽  
Test Result

Abstract The results reported here entirely confirm those of Lambourn, who found that marked deterioration occurred with all the types of abrasive wheel which he used. In the present investigation on a bonded wheel, it was concluded that the wheel was appreciably less abrasive after each period of. 50 hours' wear, while Lambourn concluded that one side of a wheel can be used for a period of two months when subjected to 40 hours of wear per week. Lambourn also concluded that the deterioration is caused by smoothing or disintegration of the abrasive particles and not by clogging with rubber dust, and points out that variation in abrasive wear can be compensated by daily tests on samples of a standard compound. He also states that a grain coarser than 24 should not be used, since the abrasion is too rapid. Since the standard emery papers vary among themselves, and the bonded abrasive wheel deteriorates when it is used, it is evident that attention should be paid to the statistical planning of these tests, so that these factors can be reduced or eliminated. The coefficient of variation of a test result, i.e., the mean of three 10-minute runs, each on duplicate specimens, (six individual readings) as normally measured, seems to be independent of the type of abrasive employed (emery papers or bonded disc) and the uncertainty of the result is about ±5 per cent when measured on the basis of volume loss per hour and about ±3.5 per cent when determined as the volume loss/H.P.-hr. Test results will therefore be required to differ by about 7 and about 5 per cent, respectively, for a significant difference to be demonstrated.

scholarly journals Sex and side determination of human hip bone by metric parameters of its posterior border

2013 ◽  
Vol 02 (01) ◽  
pp. 016-021
Author(s):  
Sarita R Margam ◽  
Megha A Doshi ◽  
Surekha D Jadhav ◽  
Raosaheb J Patil ◽  
Manoj P Ambali
Keyword(s):  
Sex Determination ◽  
Ischial Tuberosity ◽  
Test Results ◽  
Posterior Border ◽  
Bone Material ◽  
Significant Difference ◽  
The Mean ◽  
Two Parameters ◽  
Superior Border

Abstract Background: Identification of sex from skeletal remains is of medico-legal and anthropological importance for forensic experts, anthropologists and anatomists. Hip bone is considered as an ideal bone for sex determination as it provides the highest accuracy levels for sex determination. Aims: To determine the sex and side of the human hip bones by using different metric parameters of posterior border of hip bone. Material and methods: In present study, 200 (100 males and 100 females) dried adult human hip bones of known sex were collected. Two parameters were studied and statistically analysed by paired and unpaired 't' test. Results: In males, distance from the posterior superior iliac spine to the superior border of ischial tuberosity was the discriminant criteria to sex the hip bones while in females, it was distance between the posterior inferior iliac spine (PITS) to ischial tuberosity (IT). Statistically significant difference between the mean related to side were seen in both the variables. Conclusion: These two parameters can be used for sexual dimorphism as well as side determination of human hip bones or its fragments.

scholarly journals SPATIAL DISTRIBUTION OF OVERTOPPING

2012 ◽  
Vol 1 (33) ◽  
pp. 63
Author(s):  
Anestis Lioutas ◽  
Gregory M. Smith ◽  
Henk Jan Verhagen
Keyword(s):  
Spatial Distribution ◽  
Physical Model ◽  
Computational Methods ◽  
Empirical Formula ◽  
Irregular Waves ◽  
Dominant Factor ◽  
Test Results ◽  
Wave Overtopping ◽  
Set Up

The scope of this research is to find an empirical formula to describe the distribution of wave overtopping in the region behind the crest. A physical model was set up in which irregular waves were generated. In order to find a formula which adequately describes the test observations, the influence of several parameters has been analysed. The proper determination of the crest freeboard, which is a dominant factor, has been investigated. Finally, the test results have been used to assess and compare the existing relevant computational methods.

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