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Search Results: 1 - 10 of 324939 matches for " Maani S "
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Evaluation of presenting conserved foods
Asl Soleimani H,Poor Reza A,Nafisee Gh,Maani S
Tehran University Medical Journal , 1998,
Abstract: Food, it's production and preserving has been one of the most important problems in human life. Limitation of production due to climatic, geographic and papulational situations and conservation due to providance and prosecting for solution of one of the most fundamental human needs, has been discussed much. Difference between the lands, temperature, humidity and rainfall on one hand and texture and accumulation of papulation on the other hand, not only has limited the amount and kind of food production but also has improved the preserving methods as much as possible. Extra production in fertile lands and confirmed need for receiving food in deserts and dry areas, makes the need of exchanging and transfer of food inevitable because of economic and ethical matters and sanitation of food. Avoidance of being contaminated and resistance against decay seems very important and vital. So process of preserving and conserving of eaw or cooked food became a fundamental problem. In previous 200 years, many advanced methods have been designed for preserving food in which the role of conserving and packing in vital often. Because of industrial production, conserved food have a great influence on sanitation of people nutrition, and herefor the rate of diseases from consumption of contaminated food has been reduced in industrial countries and the tensancy of people to use conventional food has been decreased gradually. Because of high cost of industrial conserved food production some people produce conserved foods in the way which is not hygienic. That may have a high risk when ingested. In this article we discuss about unwarranted conserved foods productions.
Generalized Resemblance Theory of Evidence: a Proposal for Precision/Personalized Evidence-Based Medicine
Maani Beigy
Quantitative Biology , 2015,
Abstract: Precision medicine emerges as the most important contemporary paradigm shift of medical practice but has several challenges in evidence formation and implementation for clinical practice. Precision/Personalized evidence-based medicine (pEBM) requires theoretical support for decision making and information management. This study aims to provide the required methodological framework. Generalized Resemblance Theory of Evidence mainly rests upon Generalized Theory of Uncertainty which manages information as generalized constraints rather than limited statistical data, and also Prototype Resemblance Theory of Disease which defines diseases/conditions when there is a similarity relationship with prototypes (best examples of the disease). The proposed theory explains that precisely-personalized structure of evidence is formed as a generalized constraint on particular research questions, where the constraining relation deals with averaged effect sizes of studies and its comparison to null hypothesis; which might be of either probabilistic or possibilistic nature. Similarity measures were employed to deal with comparisons of high-dimensional characteristics. Real examples of a meta-analysis and its clinical application are provided. This is one of the first attempts for introducing a framework in medicine, which provides optimal balance between generalizability of formed evidence and homogeneity of studied populations.
A Contact Model for Establishment of Hip Joint Implant Wear Metrics  [PDF]
Mohammad Hodaei, Kambiz Farhang, Nazanin Maani
Journal of Biomedical Science and Engineering (JBiSE) , 2014, DOI: 10.4236/jbise.2014.74026
Abstract:

Wear is an important issue in hip implants. Excessive wear can lead to toxicity and other implant associated medical issues such as patient discomfort and decreased mobility. Since implant wear is the result of contact between surfaces of femoral head and acetabulum implant, it is important to establish a model that can address implant surface roughness interaction. A statistical contact model is developed for the interaction of femoral head and acetabulum implant in which surface roughness effects are included. The model accounts for the elastic-plastic interaction of the implant surface roughness. For this purpose femoral head and acetabulum implants are considered as macroscopically spherical surfaces containing micron-scale roughness. Approximate equations are obtained that relate the contact force to the mean surface separation explicitly. Closed form equations are obtained for hysteretic energy loss in implant using the approximate equations.

Physiological Response of Two Age Groups of Omani Male Goats to Short Road Transportation in Relation to Circulating Levels of Gonadotropins, Cortisol, Thyroid Hormones, Sex Steroids and Plasma Chemistry
A. Al-Kindi,I.T. Kadim,I.Y. Mahmoud,O. Mahgoub,J. Plude,M.Al-Maani,C.S. Bakheit
Journal of Animal and Veterinary Advances , 2012,
Abstract: The effect of short road transportation in two age groups of Omani male goats was evaluated to assess their physiological response to stress in relation to circulating levels of catecholamines (adrenaline, noradrenaline and dopamine), Thyroid Stimulating Hormones (TSH), thyroid hormones (T , T ), gondadotropins 3 4 (FSH, LH) and testosterone (T). In addition, plasma parameters cholesterol, total protein, Blood urea nitrogen (BUN), uric acid, lactate, Mg PO Ca and CO were also analyzed. Thirty seven male goats were used, 10 ++ !! ++ 4 2 at 6 months of age and 27 at 12 months of age. Each age group was divided randomly into control and experimental groups. The control goats from both age groups were transported in an open truck (3 ? 2 m), three days before they were slaughtered. The journey started at 7:00 am and lasted for 2 with light to heavy traffic at air temperature 30-31?C. At the end of the trip, the control goats were kept in a lairage of a commercial slaughterhouse with feed and water provided ad libitum. The experimental goats were subjected to the same transportation conditions except they were transported the same day they were slaughtered. Blood samples were collected from both age groups by jugular veinpuncture just before slaughtering. There were no significant differences in catecholamines, cortisol, other hormones and electrolyte values between the 6 and 12-month control groups. When the experimental data from both age groups were combined and compared with the controls of both age groups, the values remained the same expect for CO , BUN and lactate, which were 2 significant. Subjecting goats to the two h road transportation as well as to other stressors such as keeping the control animals in the lairage for 72 h, did not generate a major physiological response as that indicated by the lack of significant changes in the values of the stress hormones (cortisol and catecholamines). The results of this study will be of a value form more elaborate future study on the stress physiology of the Omani goats.
Design of Fuzzy self-tuning PID controller for pitch control system of aircraft autopilot
Nima Beygi,Maani Beigy,Mehdi Siahi
Computer Science , 2015,
Abstract: A variety of control systems have been proposed for aircraft autopilot systems. Traditional approaches such as proportional controller and conventional PID (CPID) controller are widely used. PID controller has a good static performance especially for linear and time-invariant systems, but a weak dynamic performance and discouraging function on nonlinear, time-varying, and uncertain systems. Fuzzy control theory can improve dynamic response in various conditions of system performance. This paper designs fuzzy self-tuning PID (FSPID) controller to improve disadvantages of conventional PID in aircraft autopilots. We apply proposed controller to pitch angle of aircraft then the abilities of proposed controller will be compared to the conventional PID and proportional controller. Inner feedback loop acts as oscillation damper in traditional schemes, but here is removed to compare the capabilities of Fuzzy self-tuning PID, conventional PID, and proportional controller. Based on the simulations, both of Conventional and Fuzzy self-tuning PID controllers can properly damp oscillations in lack of the inner feedback loop, but proportional controller cannot do. Then short-period approximation is assumed to assess the function of FSPID and CPID controllers in confront with abrupt and continuous disturbances, in addition to inappropriate tuning of parameters. Simulation results of short-period approximation show a better anti-disturbance function for Fuzzy self-tuning PID compare to the conventional type. Fuzzy self-tuning PID can tune the PID parameters for achieving the optimal response in view of speed, overshoot, and steady-state error in conditions of inappropriate tuning of PID parameters, based on the results of simulation in short-period approximation, the proposed controller can adaptively improve the system response by on-line setting of PID parameters.
Control of Chaos in Rate-Dependent Friction-Induced Vibration Using Adaptive Sliding Mode Control and Impulse Damper
Ehsan Maani Miandoab,Aghil Yousefi-Koma,Saeed Hashemnia
Journal of Chaos , 2013, DOI: 10.1155/2013/862103
Abstract: Two different control methods, namely, adaptive sliding mode control and impulse damper, are used to control the chaotic vibration of a block on a belt system due to the rate-dependent friction. In the first method, using the sliding mode control technique and based on the Lyapunov stability theory, a sliding surface is determined, and an adaptive control law is established which stabilizes the chaotic response of the system. In the second control method, the vibration of this system is controlled by an impulse damper. In this method, an impulsive force is applied to the system by expanding and contracting the PZT stack according to efficient control law. Numerical simulations demonstrate the effectiveness of both methods in controlling the chaotic vibration of the system. It is shown that the settling time of the controlled system using impulse damper is less than that one controlled by adaptive sliding mode control; however, it needs more control effort. 1. Introduction There exist a lot of works on the theory of friction-driven oscillations in the literature, for example, influence of the belt speed on the system response [1], dynamics of three-block mechanical system with dry friction [2], investigation on the geometry of chaotic attractors for dry friction oscillators [3, 4], influence of parametric and external excitations on a dry friction oscillator dynamics [5], and the dynamic behavior of friction-driven oscillator with an impact damper [6]. The characteristics of the friction force between two surfaces are quite complex and depend on many parameters such as, normal pressure, slip velocity, surface, and material properties [7]. The friction-actuated oscillation is strongly nonlinear, and discontinuous and has nonsmooth process, which is a source of instabilities generating stick-slip, chatter, squeal, and chaos [8, 9]. LuGre friction law is one of the most widely used friction laws which models rate dependency of the friction force by one additional inner variable [10]. In [11], LuGre friction model is applied to the single degree of freedom friction-induced oscillator, and it is shown that the oscillations of this system turned out to be chaotic for most parameter combinations. Many active control methods have been presented for control of chaotic systems such as nonlinear feedback control [12], drive-response synchronization method [13], adaptive control method [14, 15], variable structure (or sliding mode) control method [16–19], back stepping control method [20, 21], fractional control [22], impulsive control [23], and adaptive sliding
Comparison Between Manual and Electronic Haematological Analysis in Some Animals
Mahmoud R. Abd Ellah,Maha Lamlom Abd Elghani,Maani Ali Sayed,Moshira Kamel Hassan,Maram Ahmed Mahmoud
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2011.2765.2767
Abstract: The present study was carried out to compare hematological results of manual methods with the standard Medonic Vet analyzer. The study include animal species that already had their programs installed on the Medonic Vet like horse and cows and also include other animal species that their programs newly installed on the Medonic Vet, like sheep and camels. A total number of 12 animals (donkeys, cows, sheep and camels) belong to the Veterinary Teaching hospital, Assiut University, Egypt were subjected to study. Haematological analysis was performed using manual and electronic method (Medonic CA 620, Sweden) directly after collection. The results of this study indicate that manual methods for total erythrocytes count (T. RBCs), haematocrit and total leucocytes count (T. WBCs) have no significant variation with electronic blood cells counting for donkeys and cows blood. On the other hand, there were significant variations in T. RBCs and T. WBCs counts between manual and electronic methods for sheep and camel blood. In conclusion, Medonic CA620 is suitable for hematological analysis of blood from donkeys and cows and not suitable for blood from sheep and camels. Manual differential leucocytic count must associate electronic blood cells counting.
Physiological Response of Two Age Groups of Omani Sheep to Short Road Transportation in Relation to Circulating Levels of Gonasotropins, Cortisol, Thyroid
Hormones,Sex Steroids,Plasma ChemistryA. Al-Kindi,I. T. Kadim A.,I.Y. Mahmoud,O. Mahgoub,J. Plude,M. Al-Maani
Journal of Animal and Veterinary Advances , 2012,
Abstract: Two age groups of Omani sheep were subjected to a short period transportation under two sets of stress conditions. Blood samples were collected by jugular veinpuncture just before slaughtering and the degree of stress was related to hormone levels and blood chemistry. Chemiluminescence’s immunoassay technique was used to determine levels of cortisol,, gondadotropin (FSH, LH), Testosterone (T), Thyroid Stimulating Hormone (TSH) and Thyroid Hormones (T3, T4). Adrenaline, noradrenaline, and dopamine levels were determined by HPLC with electrochemical detection. In addition, plasma values of cholesterol, total protein, blood urea nitrogen (BUN3), lactate, CO Mg , PO , Ca and uric acid were also analyzed. A total of ++ ++ ++ 24 sheep were used, 12 at age of 6 months and 12 at 12 months. Each age group was randomly divided equally into control and experimental. The control sheep from each age group were transported using open truck (3X2 m) three days before they were slaughtered. The sheep were loaded at 7:00am on a 2 h journey with heavy traffic under air temperature, which varied between 30-31?C. The end of the journey, each age group was kept weparat3ly in a lairage of a commerical slaughterhouse, with food and water ad libitum. The xperimental group was subjected to the same transportation condition and with approximately the same temperate range except they were transported the same day they were slaughtered. The sheep in both age groups, which were transported the same day and then slaughtered at the end of the journey (experimental) had significantly higher cortisol value (p<0.001) than the control sheep of both ages. There was no significant difference in the catecholamine values between the experimental and control of both age groups but adrenaline and dopamine levels in the 12month sheep were significantly higher in both categories (p<0.001) than the 6month sheep. There was no clear trend in the hormone profiles and the values generally exhibited mixed results. For example FSH, TSH and T3 values wer3e significantly (p<0.05) higher in the 6-month control over the experimental, but in the 12month sheep the results were the opposite. In the blood parameters, there was also unclear trend in values. In the 6 month control, at least all the parameters were significantly lower (p<0.05) than in the experimental but the results were opposite in the 12 month sheep. Th3ere is some indication that the Omani sheep which transported on the same day demonstrated a degree of physiological stress which is based on higher values of cortisol. This probably is not caused by transportation alone but also on loading and unloading as well.
Study of the Structural and Electrical Properties of Cr-Doped BiFeO3 Ceramic  [PDF]
S. S. Arafat, S. Ibrahim
Materials Sciences and Applications (MSA) , 2017, DOI: 10.4236/msa.2017.810051
Abstract: Multiferroic BiFe1-xCrxO3 (x = 0.2 and 0.4) ceramics were synthesized in a single phase. The effects of Cr3+ substitution on the crystal structure, dielectric permittivity and leakage current were investigated. Preliminary X-ray structural studies revealed that the samples had a rhombohedral perovskite crystal structure. The dielectric constant ε' significantly increased while the dielectric loss tanδ was substantially decreased with the increase in Cr3+ substitution. The temperature effect on the dielectric properties exhibited an anomaly corresponding to magneto-electric coupling in the samples and was shifted to lower temperatures with the increase in Cr3+ substitution. The leakage current density also reduced in magnitude with the increase in the Cr3+ substitution.
Degree Splitting of Root Square Mean Graphs  [PDF]
S. S. Sandhya, S. Somasundaram, S. Anusa
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.66086
Abstract: Let \"\" be an injective function. For a vertex labeling f, the induced edge labeling \"\" is defined by, \"\" or \"\"; then, the edge labels are distinct and are from \"\". Then f is called a root square mean labeling of G. In this paper, we prove root square mean labeling of some degree splitting graphs.
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