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Hybrid Recommender System via Personalized Users’ Context

Abstract

In movie domain, finding the appropriate movie to watch is a challenging task. This paper proposes a recommender system that suggests movies in cinema that fit the user’s available time, location, mood and emotions. Conducted experiments for evaluation showed that the proposed method outperforms the other baselines.

Open access
On a nonlinear elliptic problems having large monotonocity with L 1-data in weighted Orlicz-Sobolev spaces

Abstract

We prove in weighted Orlicz-Sobolev spaces, the existence of entropy solution for a class of nonlinear elliptic equations of Leray-Lions type, with large monotonicity condition and right hand side fL 1(Ω).

Open access
Nutritional Status in Children with Chronic Renal Failure on Hemodialysis

Abstract

Background and Aim: Growth retardation is still an important manifestation of children with chronic renal failure (CRF). The aim of this study is to evaluate the growth in relation to nutritional status in Egyptian children with CRF on hemodialysis.

Subjects and Methods: The study included 30 Egyptian children above the age of six years on regular haemodialysis at the Haemodialysis Unit of the Centre of Pediatric Nephrology and Transplantation of Cairo University. Anthropometry, biochemical parameters and dietary intake were measured. Anthropometric measurements were expressed as z - scores.

Results: Data shows that height was the most affected anthropometric parameter. Short stature in CRF is proportionate and body weight is less affected than height. Dietary analysis showed that 76.7 % of patients had recommended dietary allowance of calories. Height z-score showed a significant positive correlation with caloric intake. On the other hand, the protein intake showed a significant positive correlation with blood urea nitrogen and a significant negative correlation with serum bicarbonate.

Conclusions: Nutritional assessment is essential to the management of children with CRF. Anthropometry is a sensitive indicator of the nutritional status. The study recommends avoiding excessive protein intake to prevent metabolic acidosis and accumulation of toxic nitrogen waste products.

Open access
Novel PID Tracking Controller for 2DOF Robotic Manipulator System Based on Artificial Bee Colony Algorithm

Abstract

This study presents a well-developed optimization methodology based on the dynamic inertia weight Artificial Bee Colony algorithm (ABC) to design an optimal PID controller for a robotic arm manipulator. The dynamical analysis of robotic arm manipulators investigates a coupling relation between the joint torques applied by the actuators and the position and acceleration of the robot arm. An optimal PID control law is obtained from the proposed (ABC) algorithm and applied to the robotic system. The designed controller optimizes the trajectory of the robot’s end effector for a time-variant input and makes the robot robust in the presence of external disturbance.

Open access
Economic Evaluation of Nano and Organic Fertilisers As an Alternative Source to Chemical Fertilisers on Carum Carvi L. Plant Yield and Components

Abstract

To show the benefits of organic agriculture, safe and sustainable production, the present research was performed in an open field (new reclaimed area of desert) of Wadi El-Notron, Beheira Governorate, Egypt, for two successive years (2013 and 2014) aimed at a better understanding and to investigate the role of alternative source of chemical fertilisers represented by humic substances, natural nano-zeolite-loaded nitrogen and biofertilisers (HNB) on yield, morphological, leaf and seed anatomy, chemical compositions reflected in macro and micro nutrients, indigenous hormones, plant pigments, total carbohydrates, ascorbic acid, thiamine, total phenolics, total flavonoids, total fatty acids, oil yield and constituents of caraway (Carum carvi L.) plants. Our results revealed that plants receiving a combination treatment (HNB) recorded significant increases over control in both growing seasons. Moreover, economic evaluation reflects the profound influence of combination treatment (HNB) that realized the maximum gross income and minimum production cost. These findings emphasize the magnitude of the role of natural soil additions and organic fertilisers in mitigating environmental pollution while providing safe production and also minimizing total costs of chemical fertilisers.

Open access
Development and validation of HPLC and CE methods for simultaneous determination of amlodipine and atorvastatin in the presence of their acidic degradation products in tablets

Abstract

Two methods were developed for separation and quantitation of amlodipine (AML) and atorvastatin (ATV) in the presence of their acidic degradation products. The first method was a simple isocratic RP-HPLC method while the second was capillary electrophoresis (CE). Degradation products were obtained by acidic hydrolysis of the two drugs and their structures were elucidated for the first time by IR and MS spectra. Degradation products did not interfere with the determination of either drug and the assays were therefore stability-indicating. The linearity of the proposed methods was established over the ranges 1-50 μg mL-1 for AML and ATV in the HPLC method and in the range of 3-50 and 4-50 μg mL-1 for AML and ATV, respectively, in the CE method. The proposed methods were validated according to ICH guidelines. The methods were successfully applied to estimation of AML and ATV in combined tablets.

Open access
Research Note. One minute, intraoperative assessment of the viability of hydatid cysts using a simple reagent strip test

Summary

The aim of the current work was to evaluate the possibility of using a rapid and simple reagent strip test to investigate the viability of hydatid cysts intraoperatively, via testing certain biochemical parameters. Thirty eight HCF samples were processed and examined by different methods for determining the viability status. Using the reagent strip test in the current study, the highest significant level of glucose was detected in HCF samples with the highest viability % at pH 7.5 and the lowest significant level of glucose was detected in HCF samples with the lowest viability % at pH 8.5, indicating a likely correlation between glucose concentration and the viability of PSs. On the contrary, protein was not detected in HCF containing viable PSs and was found to be higher in HCF containing non-viable PSs, denoting the possible degenerative processes in such PSs. Haemoglobin was found in trace amounts in all of our samples. In addition, the strip test detected bacterial contamination in 8 samples and biliary leakage in 7 samples. Our results suggest that the simple reagent strip test can assist in providing fast, uncomplicated primary data regarding the viability status of the hydatid cysts. Thus, it may aid the surgeons to make informed decisions for further management and appropriate follow up to minimise the risk of post-operative recurrence.

Open access