scholarly journals Further evidence that the Worst Performance Rule is a special case of the Correlation of Sorted Scores Rule

2020 ◽  
Author(s):  
Kimmo Sorjonen ◽  
Guy Madison ◽  
Tomas Hemmingsson ◽  
Bo Melin ◽  
Fredrik Ullén
Keyword(s):  
Standard Deviation ◽  
Reaction Time ◽  
Large Range ◽  
Rank Order ◽  
Statistical Properties ◽  
The Other ◽  
Other Hand ◽  
Test Rank ◽  
Higher Rank ◽  
Special Case

According to the worst performance rule (WPR), the correlations between intelligence and sorted performances, for example on reaction time tasks, should strengthen from the best to the worst performance. A commonly proposed explanation for the WPR is that poor performances reflect lapses of attention that are particularly strongly related to intelligence. The correlation of sorted scores rule (CSSR), on the other hand, claims that the WPR arises due to certain statistical properties of the data. Specifically, the magnitude of intelligence-performance correlations will change with the rank order of the test when intelligence is correlated with the within-individual standard deviation (WISD) of the tests. If the latter correlation is negative, a WPR is seen, i.e. intelligence-performance correlations will be lower for tests with higher rank order. If the intelligence-WISD correlation is positive, however, intelligence-performance correlations instead increase with test rank order. In the present study, through strategic slicing of two full samples (N = 5467 and N = 43,987, respectively), we created subsamples with a large range of intelligence-WISD correlations. In accordance with the CSSR, but not the WPR, the association between intelligence-performance correlations and test rank order was found to reflect the intelligence-WISD correlation of the subsample. This indicates that the WPR might be a special case of the more general CSSR and that the WPR is crucially dependent on intelligence-WISD correlations. The findings also indicate that the predictions made by the CSSR generalize to other predictors besides intelligence and to other outcomes besides reaction time.

Degradation of chlorpyriphos in water by advanced oxidation processes

2010 ◽  
Vol 10 (1) ◽  
pp. 1-6 ◽  
Author(s):  
R. Murillo ◽  
J. Sarasa ◽  
M. Lanao ◽  
J. L. Ovelleiro
Keyword(s):  
Reaction Time ◽  
Light Source ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
The Other ◽  
Molar Ratio ◽  
Optimum Conditions ◽  
Oxidation Processes ◽  
Other Hand ◽  
Initial Ph

The degradation of chlorpyriphos by different advanced oxidation processes such as photo-Fenton, TiO2, TiO2/H2O2, O3 and O3/H2O2 was investigated. The photo-Fenton and TiO2 processes were optimized using a solar chamber as light source. The optimum dosages of the photo-Fenton treatment were: [H2O2]=0.01 M; [Fe3 + ]=10 mg l−1; initial pH = 3.5. With these optimum conditions total degradation was observed after 15 minutes of reaction time. The application of sunlight was also efficient as total degradation was achieved after 60 minutes. The optimum dosage using only TiO2 as catalyst was 1,000 mg l−1, obtaining the maximum degradation at 20 minutes of reaction time. On the other hand, the addition of 0.02 M of H2O2 to a lower dosage of TiO2 (10 mg l−1) provides the same degradation. The ozonation treatment achieved complete degradation at 30 minutes of reaction time. On the other hand, it was observed that the degradation was faster by adding H2O2 (H2O2/O3 molar ratio = 0.5). In this case, total degradation was observed after 20 minutes.

scholarly journals Carbon and nitrogen isotopic composition of commercial dog food in Brazil

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e5828 ◽  
Author(s):  
Leonardo de Aro Galera ◽  
Adibe Luiz Abdalla Filho ◽  
Luiza Santos Reis ◽  
Janaina Leite de Souza ◽  
Yeleine Almoza Hernandez ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Stable Isotope ◽  
Environmental Sustainability ◽  
The Other ◽  
Pet Food ◽  
Average Standard Deviation ◽  
Specific Product ◽  
Dog Food ◽  
Other Hand ◽  
Dry Food

Background Brazil is a low- to medium-income country and has the second largest pet food market in the world with 8% of world pet food consumption. The lowest-income social class spends around 17% of their domestic budget on pet food and other items related to pets. Consumers are frequently misled by advertising as there is no precise information about the main sources of protein, carbohydrates and fat in the labels, and the Brazilian pet food industry can legally claim that their products contain certain items like salmon or beef even if they use just a flavoring compound. Methods The stable isotope methodology compares the stable isotope ratios of carbon (13C/12C) and nitrogen (15N/14N) between source and product. The 13C/12C ratio of a specific product (e.g., dog food) reveals the proportions of C4 (maize) and C3 (soybean, rice and wheat) plants in that product and the 15N/14N ratio reveals the proportion of the compounds derived from animals. With this isotopic data, we used MixSIAR, a Bayesian stable isotope-mixing model, to estimate the proportion of maize, grains, poultry and beef in dog food. Results The δ13C values of dry dog food ranged from −24.2‰ to −12.8‰, with an average (± standard-deviation) of −17.1‰ ± 2.8‰. The δ13C values of wet pet food ranged from −25.4‰ to −16.9‰, with an average (± standard-deviation) of −21.2‰ ± 2.4‰, which was significantly lower (p < 0.01). The δ15N values of the dry and wet food ranged from 1.7‰ to 4.2‰, and from 0.5‰ to 5.5‰, respectively. The average δ15N values of dry food (2.9‰ ± 0.5‰) was not higher than the wet food (2.6‰ ± 1.3‰) (p > 0.01). The output of the MixSIAR showed a low proportion of bovine products in dry dog food samples. On the other hand, poultry was obviously the dominant ingredient present in most of the samples. Maize was the second dominant ingredient. Wet and dry dog food showed similar isotopic analysis results. The only difference was a lower proportion of maize and higher proportion of grains in wet dog food. Discussion The main finding is that dog food in Brazil is mostly made of approximately 60% (ranging from 32% to 86%) animal-based and 40% (ranging from 14% to 67%) plant-based products. Poultry and maize are the main ingredients. Poultry is added as a by-product or meal, which avoids competition between dogs and humans for meat products, while they can compete for maize. On the other hand, a large proportion of plant-based products in dog food decreases the energy and environmental footprint, since plant-based food products tend to be less harmful compared to animal-based products. Labels can mislead consumers by showing pictures of items that are not necessarily part of the product composition and by not showing the detailed information on the proportion of each ingredient. This information would allow customers to make their own choices considering their pet’s nutrition, the competition between animals and humans for resources and environmental sustainability.

Analyses and Evaluation of Responses to Slowly Changing Dimensions in Data Warehouses

2011 ◽  
pp. 324-337
Author(s):  
Lars Frank ◽  
Christian Frank
Keyword(s):  
Data Warehouse ◽  
Concurrency Control ◽  
The Other ◽  
Data Warehouses ◽  
Other Hand ◽  
Star Schema ◽  
Dynamic Dimension ◽  
Special Case

A Star Schema Data Warehouse looks like a star with a central, so-called fact table, in the middle, surrounded by so-called dimension tables with one-to-many relationships to the central fact table. Dimensions are defined as dynamic or slowly changing if the attributes or relationships of a dimension can be updated. Aggregations of fact data to the level of the related dynamic dimensions might be misleading if the fact data are aggregated without considering the changes of the dimensions. In this chapter, we will first prove that the problems of SCD (Slowly Changing Dimensions) in a datawarehouse may be viewed as a special case of the read skew anomaly that may occur when different transactions access and update records without concurrency control. That is, we prove that aggregating fact data to the levels of a dynamic dimension should not make sense. On the other hand, we will also illustrate, by examples, that in some situations it does make sense that fact data is aggregated to the levels of a dynamic dimension. That is, it is the semantics of the data that determine whether historical dimension data should be preserved or destroyed. Even worse, we also illustrate that for some applications, we need a history preserving response, while for other applications at the same time need a history destroying response. Kimball et al., (2002), have described three classic solutions/responses to handling the aggregation problems caused by slowly changing dimensions. In this chapter, we will describe and evaluate four more responses of which one are new. This is important because all the responses have very different properties, and it is not possible to select a best solution without knowing the semantics of the data.

Effects of Speed and Accuracy of Exertion of Force on the Relationship between Force Output and Fractionated Reaction Time

1991 ◽  
Vol 73 (1) ◽  
pp. 327-334 ◽  
Author(s):  
Shoko Kawabe-Himeno
Keyword(s):  
Reaction Time ◽  
Isometric Contraction ◽  
Light Signal ◽  
The Other ◽  
Force Output ◽  
Motor Time ◽  
Premotor Time ◽  
Other Hand ◽  
The Relationship ◽  
Speed And Accuracy

The present study was designed to investigate the effect of speed and accuracy of force exertion on the relationship between force output and fractionated reaction time. Subjects exerted their force (10% or 40% of maximum isometric contraction) on “accurate” and “fast” tasks as rapidly as possible at the light signal. On the “fast” task, premotor time for the 40% target was lengthened in comparison with that for the 10% target, and motor time was shortened with an increase of force output. On the “accurate” task, on the other hand, premotor time was independent of magnitude of force, and no relation between motor time and force output was found. These findings show that the relationship between force output and fractionated reaction time may be affected by the effort to exert force accurately.

Copolymerization of Ethylene/Diene with Different Metallocene Catalysts

2006 ◽  
Vol 61 (11) ◽  
pp. 1426-1432 ◽  
Author(s):  
Maria de Fátima Vieira Marques ◽  
Fernanda Constantino Rocha ◽  
Narda Juárez Soto
Keyword(s):  
Catalytic Activity ◽  
Thermal Properties ◽  
Reaction Time ◽  
Polymerization Rate ◽  
The Other ◽  
Copolymer Composition ◽  
Metallocene Catalysts ◽  
Ethylene Pressure ◽  
Other Hand ◽  
Catalyst Type

Copolymerizations of ethylene and 1,7-octadiene were carried out employing homogeneous catalysts Cp2ZrCl2, Ph2C(Flu,Cp)ZrCl2 and Et(Ind)2ZrCl2, and methylaluminoxane as cocatalyst. The polymerization characteristics, such as catalytic activity, polymerization rate, copolymer composition, and thermal properties were examined in relation to the catalyst type. Different comonomer concentrations were employed, and the reaction time was varied, ranging from 1 h up to 4 h, at 90°C and at 0.5 bar ethylene pressure. The results showed that the catalyst Cp2ZrCl2 was more efficient than Et(Ind)2ZrCl2 in the preparation of high diene content ethylene/1,7-octadiene copolymers. On the other hand, Et(Ind)2ZrCl2 and Ph2C(Flu,Cp)2ZrCl2 catalysts produced low insaturation content but possibly formed cyclic structures and crosslinking.

scholarly journals PENGARUH PENGGUNAAN MEDIA GAMBAR TERHADAP KETERAMPILAN BERBICARA BAHASA INGGRIS

2019 ◽  
Vol 2 (2) ◽  
pp. 181-194
Author(s):  
Doni Anggoro Ari Santoso ◽  
Zumrotul Muniroh ◽  
Nurul Akmaliah
Keyword(s):  
Data Analysis ◽  
Standard Deviation ◽  
Learning Process ◽  
The Other ◽  
Total Variance ◽  
Average Score ◽  
Other Hand ◽  
Flash Cards ◽  
Experiment Method ◽  
English Speaking

ABSTRACT The purpose of this research is to find out the effect of the using of flash cards towards student’s speaking ability in STBA Pertiwi, Cileungsi. The researchers hope that this research can give advantages to all of lecturers and students in doing the learning process, especially in English speaking ability. The method used in this research is experiment method using two groups of classes. One class as experiment class, where the researchers are giving the materials using flash cards. While the other class is control class, where the materials are given with lecturing method. Based on the result of the data analysis, it can be concluded that the average score for English speaking ability in control class is 64,7. The median is 61.5. The modus is 57,5. The variance is 258, 6256. And the standard deviation is 16,082. In the other hand, the average score for English speaking ability in experiment class is 70,5. The median is 71,21. The modus is 85,056. The variance is 229, 128. And the standard deviation is 15,14. It is also obtained that the equation of Total Variance is 15,62. And the TObserved is 1,69 and the T table is 1,667. So that Tobserved >Ttable; 1,69>1,667 that is significant. It can be concluded that there is positive and significant effect of using of flash cards towards student’s speaking ability in STBA Pertiwi, Cileungsi.

scholarly journals A DECADAL ANALYSIS AND SENSITIVITY STUDY USING MOPITT CO COLUMNS OVER ASIA

2018 ◽  
Vol XLII-3/W5 ◽  
pp. 53-59 ◽  
Author(s):  
C. Lin ◽  
J. Cohen
Keyword(s):  
Standard Deviation ◽  
Biomass Burning ◽  
Urban Areas ◽  
Sensitivity Study ◽  
The Other ◽  
Peak Time ◽  
Urban Regions ◽  
Forest Clearing ◽  
Other Hand ◽  
A New Technique

<p><strong>Abstract.</strong> Biomass burning and urbanization are both significant sources of CO emissions and atmospheric loadings in the real environment. The sources of CO are due to incomplete combustion, on one hand of biomass from agriculture or forest clearing, and on the other hand from coal, oil, gas, and other similar materials. However, the spatial and temporal underlying properties and patterns are quite different between these two types of source regions, with urban regions having a relatively constant source of CO emissions, with only short term concentration fluctuations due to local meteorology. On the other hand, in biomass burning regions, the emissions themselves tend to be highly concentrated over a short burning period, and very low otherwise. We hence present a new technique to classify and quantify biomass burning regions and urban regions based on an objective analysis of the CO total column measurements from the MOPITT satellite. By using all of the data from 2000&amp;ndash;2016, in connection with averages and standard deviation cutoffs, we successfully determine these regions. By performing a sensitivity analysis, in connection with additional ground-based measurements, we determine that the ideal cutoffs for the mean column loading and standard deviation of the column loading 28<span class="thinspace"></span>&amp;times;<span class="thinspace"></span>1017<span class="thinspace"></span>mol/cm<sup>2</sup> and 6<span class="thinspace"></span>&amp;times;<span class="thinspace"></span>1017<span class="thinspace"></span>mol/cm<sup>2</sup> respectively. These results are capable of representing known urban regions and biomass burning regions well throughout China, Southeast Asia, and South Asia, specifically including Beijing, Hebei, Shandong, Jiangsu, Anhui, Hunan, Guangdong, and Bangkok on one hand, and Northeastern India, Myanmar, Laos, Northern Thailand, and Vietnam on the other hand. A detailed analysis of the time series over the different classified regions show that while the urban areas have a much higher annual value, and a relatively long peak time, that their maximum is never as high as the peaks in the biomass burning regions, and that these peaks in the biomass burning regions are extremely short in duration, although they occur annually or bi-annually. Finally, we have not been able to obtain a statistically relevant decreasing trend, as others have found, making CO possibly an interesting species for future studies.</p>

Continuidad y discontinuidad en la transmisión de las palabras patrimoniales competidas por arabismos: oliva y aceituna, olio y aceite, olivo y aceituno

2021 ◽  
Vol 66 (4) ◽  
pp. 69-80
Author(s):  
Mihai Enăchescu ◽  
Keyword(s):  
Spanish Language ◽  
Corpus Analysis ◽  
The Other ◽  
Other Hand ◽  
The Common ◽  
Lexical Substitution ◽  
Restricted Use ◽  
Special Case ◽  
Continuity And Discontinuity

Continuity and Discontinuity in the Transmission of Spanish Inherited Words Competed by Arabisms: oliva and aceituna, olio and aceite, olivo and aceituno. The loss and replacement of Arabisms by Latin loanwords was a frequent phenomenon between the sixteenth and the seventeenth centuries; the opposite movement, the replacement of an inherited word by an Arabism is far less frequent. Oliva, an inherited word, is competed by the Arabism aceituna; currently the common name for the fruit in the Hispanic world is aceituna, and oliva has a restricted use to the phrase aceite de oliva or to refer to a colour. Similarly, the inherited word olio will be replaced by aceite, and with a specialized meaning will be eliminated by the euphuism óleo, its etymological doublet. On the other hand, olivo prevails over aceituno and represents a special case of continuity in this lexical family. The research will be carried out in two directions: first, I will analyse the old academic dictionaries and other specialized dictionaries and glossaries from the fifteenth-twentieth centuries. Second, I will conduct a corpus analysis, based on the diachronic corpora available for the Spanish language. This study will try to answer the questions how? and why? of these neological movements of vocabulary. Keywords: inherited words, Arabisms, oliva, aceituna, lexical substitution

Effects of Preparatory Period on a Reaction-Time Followed by a Pointing Movement Either Guided or Not

1973 ◽  
Vol 37 (3) ◽  
pp. 980-982
Author(s):  
Yves Guiard ◽  
Jean Requin
Keyword(s):  
Reaction Time ◽  
Movement Time ◽  
The Other ◽  
Preparatory Period ◽  
Other Hand ◽  
Pointing Movement ◽  
Pointing Task ◽  
The Mean

In a pointing task, the movement-time (MT), as opposed to reaction-time (RT), does not depend upon duration of preparatory period (PP). On the other hand, the mean MT, but not the mean RT, is shortened by guidance of the movement. The timing of preparatory processes in such task is discussed.

scholarly journals A Linguistic Evaluation of Rule-Based, Phrase-Based, and Neural MT Engines

2017 ◽  
Vol 108 (1) ◽  
pp. 159-170 ◽  
Author(s):  
Aljoscha Burchardt ◽  
Vivien Macketanz ◽  
Jon Dehdari ◽  
Georg Heigold ◽  
Jan-Thorsten Peter ◽  
...  
Keyword(s):  
Machine Translation ◽  
Large Range ◽  
The Other ◽  
Test Suite ◽  
Rule Based ◽  
Online System ◽  
Other Hand ◽  
The One

AbstractIn this paper, we report an analysis of the strengths and weaknesses of several Machine Translation (MT) engines implementing the three most widely used paradigms. The analysis is based on a manually built test suite that comprises a large range of linguistic phenomena. Two main observations are on the one hand the striking improvement of an commercial online system when turning from a phrase-based to a neural engine and on the other hand that the successful translations of neural MT systems sometimes bear resemblance with the translations of a rule-based MT system.

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