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In this paper, we propose an improvement to the similarity thesaurus construction method used for query expansion in information retrieval. Our proposed method shows an improvement of about 3.3% over its predecessor method. The method was used for constructing an Arabic The saurus and can be used with other languages as well
The purpose of this study is to evaluate two different drug information sources. This was achieved
by comparing the time required to find an answer to a drug information question in addition to the
easiness of use, comprehensiveness, breadth of information and cost of two different media
namely CD-ROM database DRUGDEX® and the internet Search engine "ALTAVISTA". The
study was conducted at the Drug Information Center (DIC) of the College of Pharmacy, King
Saud University, Riyadh, Saudi Arabia. One hundred questions were answered using both sources
and the results for each question were determined. The mean time required to find the answer
was 1.70 ± 1.19 and 5.05 ± 4.52 min, using DRUGDEX® and "ALTAVISTA" respectively. In
terms of easiness of use, DRUGDEX ® easily answered 78% of questions versus 55% answered
easily by "ALTAVISTA" (p=0....
In this research, spoken Arabic digits are investigated from the speech recognition problem point of view. The system is designed to recognize an isolated whole-word speech. In the training and testing phase of this system, isolated digits data sets are taken from the telephony Arabic speech corpus, SAAVB. This standard corpus was developed by KACST and it is classified as a noisy speech database collected via fixed and mobile telephones. SAAVB consist of many subsets covering all digits, alphabets, read scripts, spontaneous speech, etc. SAAVB subsets that deal with Arabic digits are SAAVB01, SAAVB02, and SAAVB03. Four different experiments are conducted on these subsets, three on each individual set, and the fourth one conducted on these three subsets collectively. The recognition system achieved 93.67% overall correct rate of digit r...
The use of sound vibration as well as mixing of particles is investigated in this paper for improving the fluidizability of nano-powders. Amorphous anhydrous silicon dioxide, Aerosil 200, widely used in paint and pharmaceutical industries, was fluidized with air at superficial gas velocities as high as 25. cm/s. In the first part of the study, the bed was subjected to sound at 125. dB at a frequency 200. Hz. In the second part, a carefully selected additive material of the Geldart group A classification, presently sand, was added to the bed in relatively small proportions of 3, 6 and 11. wt.%. For the in situ monitoring of the fluidization dynamics, pressure fluctuations were acquired at a sampling frequency of 200. Hz using a fast-response sensitive-pressure transducer along the test section of the column located 11. cm and 23. cm abo...
Two methods were developed to detect dried milk in fresh milk and yoghurt. The first method was based on the reaction with thiobarbeturic acid (TBA) while the second was based on measuring the milk reducing substances (MRS) with ferricyanide. The simple correlation coefficients (r) between per-centage dried milk and TBA (r=O.9861), and MRS (r=O.9994) values were highly significant (P";;O.OI). Therefore, either TBA or MRS methods could be used to detect dried milk in fresh pasteurized milk and yoghurt. However, MRS method could better detect low levels of added NFDM to fresh pasteurized milk and yoghurt.
Esthetics has become a significant aspect of dentistry and clinicians are faced with achieving acceptable gingival esthetics
as well as addressing biologic and functional problems. The color of the gingiva plays an important role in overall esthetics
but the principles and the techniques of the management of the problems associated with gingival melanin pigmentation
are still not fully established. A method of de-epithelialization of the pigmented or discolored areas of the gingiva using
a surgical diamond bur is documented. The technique is relatively simple and versatile and requires minimum time and
effort. If repigmentation occurs, the procedure can be done repeatedly in the same area without limitation or causing any
permanent damage. Three cases of gingival hyperpigmentation treated by the surgical abrasion technique are describe...
Computer simulations were performed using model-predictive control (MPC) algorithm for the control of a reverse-osmosis desalination unit. A dynamic mathematical model of the process, which was developed and experimentally validated in an earlier study [1], was used as basis for the control. The two output variables considered were permeate flow rate and concentration. The respective manipulated variables were feed pressure and brine flow rate. This control strategy is more realistic and closer to the industrial practice than using the feed pH to control the quality of permeate as it is reported in many control studies of RO systems in the literature. The performance of the MPC was compared to that obtained using a classical PI controller. The MPC offers better performance than the PI controller. It also provides good robustness charac...
An intensive literature review on evaluating microleakage suggested that a quantitative method is needed. Further, the review concluded that an in vitro reference controlled reverse diffusion method is one which is likely to be nondestructive, simple, objective and capable of quantitating microleakage in real time and over extended durations. Since the proposed method can be influenced by extraneous variables, careful standardization of the experimental procedure was necessary. Ten experiments leading to the choice of the proper material/method of testing were conducted. The results of all experiments are reported. Based on the results of these pilot studies, a well calibrated overall experimental procedure for quantitating microleakage in vitro was determined. The standardized reference controlled procedure is recommended for quantita...
In this paper, we present a new automatic image clustering algorithm based on a modified version of particle swarm optimization algorithm. ACMPSO clustering algorithm can partition image into compact and well separated clusters without any knowledge on the real
number of clusters. It uses a swarm of particles with variable number of length, which evolve dynamically using mutation operators. Experimental results on real images demonstrate that the proposed algorithm is able to extract the correct number of clusters with denser and more compactness clusters. The results demonstrate that ACMPSOoutperforms other optimization algorithms.
