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Neila J. Donovan 한국언어재활사협회 2018 Clinical Archives of Communication Disorders Vol.3 No.1
Purpose: To examine the psychometric properties of the Communicative Effectiveness Survey-Revised (CESR), a patient reported outcome measure of communicative effectiveness for people with Parkinson’s disease (PD) and dysarthria using Rasch analysis, a one-parameter logistic probability model based on principles of scientific measurement. Methods: 60 individuals with PD and hypokinetic dysarthria rated their communicative effectiveness on a 27-item, 4-point equal interval scale. Exploratory Factor Analysis (EFA) was run to determine unidimensionality. Rasch analysis was completed using the rating scale model. The various analyses allow researchers to examine the item-level psychometric properties of the CESR, which result in measures of validity, reliability and sensitivity. Results: The EFA demonstrated a single linear construct (confirmed unidimensionality) which allowed Rasch analysis to proceed. Results indicated: the theoretical item difficulty hierarchy established a priori had a strong positive correlation with the CESR item difficulty hierarchy, indicative of construct validity; the 4-unit rating scale comprised equal intervals; the match between person ability and item difficulty was near the ideal range, indicative of content validity; person reliability (comparable to Cronbach’s alpha) was strong; 4) the CESR separated respondents into 4 statistically significant ability levels, indicative of respondent reliability and sensitivity of the measure; and no ceiling or floor effects existed, although participants demonstrated a wide range of ability. Conclusions: The CESR demonstrated strong item-level psychometric properties which were indicative of validity, reliability and sensitivity of the scale for use with individuals with PD and dysarthria. Further testing must be completed to determine cutoff and clinically meaningful difference scores.
EMPIRICAL ANALYSIS OF THE RELATIONSHIP BETWEEN MILITARY ENDEAVOR, ECONOMIC GROWTH AND HAPPINESS
NEILA BEN AFIA,SANA HARBI 중앙대학교 경제연구소 2017 Journal of Economic Development Vol.42 No.2
We study the relationship between happiness, economic growth and military endeavor. A distinction is drawn between the direct and the indirect impact of military endeavor on happiness which operates through the impact of military endeavor on income and the impact of income on happiness. Using panel data analysis for 45 countries covering the period from 2000 to 2013, direct and indirect impacts of military endeavor on happiness are estimated. Our results show that the military endeavor has a positive direct impact on happiness. Indirect effects are found to be positive, the total effect of military endeavor on happiness is positive.
THE RELATIONSHIP BETWEEN ENERGY CONSUMPTION, ECONOMIC GROWTH, AND HAPPINESS
NEILA BEN AFIA 중앙대학교 경제연구소 2019 Journal of Economic Development Vol.44 No.3
For the important role of happiness in our lives, the aim of this study was to investigate empirically the relationship between the consumption of energy, economic growth, and happiness. A distinction is drawn between the direct and indirect impact of consumption of energy on happiness which functions throughout the impact of consumption of energy on per capita income and the resulting impact of income on happiness. Using panel data analysis of 47 different countries over 14 years covering the period from 2001 to 2014, both direct and indirect effects of consumption of energy on happiness are estimated. We remedy the potential endogeneity problem when estimating the indirect effect by instrumenting the variable “consumption of energy”. Our results show that the consumption of energy has a significant positive direct impact and indirect effects on happiness resulting in an overall positive effect of consumption of energy on happiness for all countries.
An Improved Polytopic Adaptive LPV Observer Design Under Actuator Fault
Radhia Houimli,Neila Bedioui,Mongi Besbes 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.1
In this paper, we treat the problem of both state estimation and fault detection of nonlinear systems. Those systems could be described by a poly-quadratic Linear Parameter-Varying (LPV) form. A new adaptive observer is developed in terms of Linear Matrix Inequalities (LMI) technique. A feasible algorithm is developed to compute the designed parameters. This algorithm provides more flexibility and mitigates the conservatism of quadratic approach. Finally, simulation results are presented to illustrate the efficiency of the proposed method.
Chahra Chbili,Neila Fathallah,Manel Nouira,Aicha Laouani,Anis Hassine,Sana Ben Amor,Sofiene Ben Ammou,Saad Saguem 한국유전학회 2015 Genes & Genomics Vol.37 No.12
Glutathione-S-transferases enzymes are involved in the detoxification of several endogenous and exogenous substances. These genetic pathways could be involved in the therapeutic efficacy and toxic effects of carbamazepine by modulating metabolic profiles. In this present study, we evaluated the effects of two glutathione- S-transferase polymorphisms, GSTM1 and GSTT1, on metabolic phenotype of carbamazepine in a Tunisian population. These polymorphisms were studied in 94 patients with epilepsy, using a polymerase chain reaction. Test U Mann–Whitney was used for analyzing results. The study results demonstrated that individuals with the glutathione- S-transferase M1 null genotype were at an increased risk of toxicity secondary to a relative accumulation of carbamazepine 10,11-epoxide and carbamazepine. Consequently leading to an increase in the plasma concentration of carbamazepine and carbamazepine 10,11- epoxide (P = 0.03, P = 0.01 respectively). Whereas no significant effects were observed between individuals with glutathione-S-transferase M1 or glutathione-S-transferase T1 null genotype and metabolic ratio carbamazepine 10,11-epoxide to carbamazepine (P = 0.40). These genotyping findings revealed that the absence of GSTM1 activity could be a contributor factor for the development of toxic effects of carbamazepine. Such an accumulation would require eventually a dosage adjustment.
Perfect tracking of ZMP trajectory for humanoid locomotion using repetitive control
Mohamed A. Sayari,Riadh Zaier,Neila Masmoudi 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.12
In this paper, the tracking of the zero moment point (ZMP) trajectory for humanoid locomotion is addressed. For that, a combination of a repetitive controller (RC) and a linear quadratic regulator (LQR) is proposed. The RC controller achieves a zero steady state tracking error for any periodic desired output with a fixed period. Here, the robot model is simplified as a cart table model. In the first stage, a walking pattern with constant gait is considered to allow the use of a repetitive controller. The results are then compared to a classical PD control. In the second part, the proposed controller is applied to track a desired ZMP profile generated using a central pattern generator (CPG). Here, the speed of the oscillator is adjusted via a proper selection of the parameters of the CPG and the RC design is simultaneously updated to assure the perfect tracking of the ZMP.
Paula Mattanna,Priscila Dallé da Rosa,Ana Paula Gusso,Neila S. P. S. Richards,Patrícia Valente 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.6
Microbial oils enriched in essential polyunsaturatedfatty acids can be used as nutritionalcomplements. In order to improve the lipid yields and lipidprofiles of 2 Yarrowia lipolytica strains, the effects ofmedium components and culture conditions were investigatedusing shake flasks. Under optimized conditions (cultivationfor 3 days at 25ºC and 150 rpm, using peptone as anitrogen source and glucose as a carbon source), thebiomass, lipid yield, and lipid content reached 6.75 g/L,3.48 g/L, and 51.55% for Y. lipolytica QU22, and 6.85 g/L,3.52 g/L, and 51.38% for Y. lipolytica QU137, respectively. Using a shaking speed of 150 rpm, unsaturated fatty acidsconstituted 87.96% (QU22) and 87.08% (QU137) of thetotal lipids produced by these strains, with 9.52 and 7.86%of alpha-linolenic acid, respectively. The strains are suitablecandidates for fermentation processes involving essentialpolyunsaturated fatty acid (PUFA) production.