Archives-December 

The triangle wave averaging multiplier is reformed and designed using operational amplifiers. The input voltages V1 and V2 are added with a reference triangle wave of peak value VT, to get a voltage VX. The triangle wave is added with one input voltage V1 and subtracted with another input voltage V2, to get a voltage VY. The voltage VX is positive rectified and its average voltage VA is obtained though a low pass filter. The voltage VY is negative rectified and its average voltage VB is obtained through another low pass filter. A summing amplifier is used to get VA-VB-V1. The output voltage of this summing amplifier is the output voltage VO which is proportional to the product of the two input voltages. The peak value VT of the triangular wave is the proportional constant and it should be stable and precession. Verification of feasibility of circuit configuration is established by way of test results on a proto type.

Now in a days, there is a vast use of images in many applications. Today duplication of any digital items or multimedia have become very easy task. So digital image watermarking technique becomes the best solution for the protection of illicit operation. In this technique some kind of secret data is embedded to the cover image and this information is used for the authentication purpose. In this paper a combined DCT-DWT based watermarking algorithm is proposed in which the secret data is hidden to the lower frequency band of the cover image.

The ultimate goal of each and every learning situation is social skills which help learners become better person for themselves as well as their society. In this line critical reading gives learners mental disciplines and intellectual development and it addresses social issues. Therefore, in the present study, the researchers endeavored to investigate if teaching critical reading through pictorial verses nonpictorial texts can be influential and practical in improving the Iranian EFL learners’ reading comprehension. To fulfil the purpose of this study, after homogenizing the learners, they were divided into three groups, namely two experimental and one control groups. In the end of the term a PET of reading was run and the data analysis showed that there were significant differences between the means of the three groups on the posttest of reading comprehension, and the first experimental group which were taught reading both critically and through pictorial texts outperformed both the second experimental group which were taught only through critical reading with no pictorial texts and control group which were taugh noly through pictorial texts and not critically.

Text detection and recognition in real images taken in unconstrained environments, such as street view images, remain surprisingly challenging in Computer Vision. Extraction of text and caption from images and videos is important and in great demand for video retrieval, annotation, indexing and content analysis. In this paper, we propose a text extraction algorithm using Dual Tree Complex transform. It is demonstrated that the proposed method achieved reasonable accuracy of the text extraction for moderately difficult examples.

This study is a descriptive research attempting to compare and contrast the use of two types of cohesive devices (i.e. lexical cohesion and ellipsis) in the original dialogues of a television serial with the Persian subtitled and dubbed versions of the same dialogues. The data used in this study comprised the dialogues of 10 scenes selected by the researcher from the television serial ‘Ann of Green Gables’ as well as the dubbed and subtitled counterparts of the dialogues of the same scenes. The study sought two objectives: First, it attempted to investigate the original dialogues of the film, in terms of the frequency of the use of the two mentioned types of cohesive devices, and to compare them with the dubbed and subtitled versions; second, it aimed to compare the two types of audio-visual translations (i.e. dubbing and subtitling) to find out how they have dealt with these cohesive devices and what differences exist between these two types of translation in terms of their handling lexical cohesion and ellipsis. For this purpose, the study employed Halliday and Hasan’s (1976) model of cohesive devices. The findings revealed that repetition has the greatest frequency of use among lexical cohesion elements and clausal ellipsis has the greatest frequency among ellipsis types in the original dialogues. The findings also demonstrated that the two translated versions were relatively similar in their handling lexical cohesion but the dubbed version contained a substantially greater number of cases of ellipsis than the subtitled version did. The findings of this research could provide audiovisual translators with information as to how the cohesive elements are differently used in the English dialogues and their Persian translations (subtitled and dubbed dialogues).

Abu Hanifa Dinavari is one of the most prominent scholars of Islamic civilization and the glories of Iranian history and culture with a venerable and high position in various branches of science especially botany, astronomy, mathematics, mechanics, atmosphere science, climate change (Elm al-Anvae), lexicology, literature, grammar and syntax, interpretation of Quran sciences, historiography, and other branches of intellectual sciences and traditional knowledge. His brilliant knowledge and ample publications made him one great scholar among several scientists and knowledgeable scholars of his time, so that he influenced many sciences. However, his scientific status is not as high as what he deserves to be. What has influenced his character more than anything in scientific circles and among scholars is his historiographical approach due to the publication of the complete text of Al-Akhbar at-Tiwal. While criticizing this viewpoint, the present paper attempts to study the scientific-cultural status and function of Abu Hanifa Dinavari in Islamic civilization. Also using a new and comprehensive approach, and by a complete and more deeply approach and in proportion to the effective position of such scholar in Islamic civilization, the study aims to analyze intellectual thinking and different scholarly and scientific aspects of this distinguished scholar. In addition, with a careful and thorough review and introducing Abu Hanifa Dinavari works, different aspects of his knowledge and character will be further clarified in the study.

This has been asserted that AOP allows attaining better design quality systems than those built with OOP, namely by reducing scattering and tangling from the research literature. There is limited quantitative and qualitative research supporting those arguments which already were published. Software metrics are very important validating procedure of quality software and software properties of aspect oriented programming (AOP). Object oriented programming (OOP) implementations may suffer certain drawbacks that will affect the design quality of the system and thus its system maintainability, comprehensibility, understandability and testability. Aspect oriented programming (AOP) facilitates with powerful quantification constructs to handle design quality. In this paper, we compare two versions (Java and AspectJ) of observer patterns to further investigate within the context of design quality. We evaluated the system based on the value of these design quality metrics RFC, CBM, LCO and WMC.We claim that the AOP has significance effect on design quality than OOP

This paper presents application of artificial immune system for economic dispatch problem of thermal plants. Numerical results of various test systems have been presented to demonstrate the performance of the proposed algorithm. In human body the immune system finds virus or bacteria and destroys it. Similarly this technique works. The results achieved from the proposed algorithm are compared with those obtained from differential evolution, particle swarm optimization, PSO Crazy, and GA technique. An artificial immune system is a search technique used in computing to find true or approximate solution to optimization and search problems.

The presence of phosphorus in plant material is abundant while the soil phosphorus availability is limited for plants due to their quick transformation to the insoluble form. There are many soil micro-organisms which could enhance the solubility of insoluble phosphate in soils and make it available for plant growth. This study investigates the coexistence of phosphate solubilizing bacteria in the rhizosphere soil of sorghum bicolor pre-inoculated with mycorrhizal fungi (AMF)Glomus sp. The rhizosphere soil sample was collected and the phosphate solubilizing bacteria was enumerated followed by screening for their efficiency to solubilize the insoluble phosphate using pikovskaya’s medium. Based on the solubilization index five bacterial isolates were chosen for further study. All the five phosphate solubilizing bacteria were subjected to morphological and various biochemical tests and were identified as Acinetobacter sp, Bacillus sp, Pseudomonas fluorescence, Pseudomonas aeruginosa and Micrococcus sp. The maximum solubilization index was shown by Bacillus sp (1.75cm) followed by Micrococcus sp (1.75cm) on 6th day of incubation and the total soluble inorganic phosphorus production was estimated caloriemetrically which showed the maximum production by Bacillus sp (186 µg/ml) followed by Micrococcus sp (184µg/ml) on 6th day of incubation. The five PSB isolates were associated with the drop in pH with the production of soluble inorganic phosphorus.

The effects of dry-heat and seed soaking in distilled water on germination performance of W. somnifera and Sida cordifolia L. were studied. Dry-heat pretreatments for several times (1-60 min) significantly increase germination percentage. The highest germination was obtained at 1000 C (80% and 83%, respectively). A significant increase in germination rate was achieved under different pretreatments. The physiological dormancy caused by an impermeable seed coat can be overcome by dry-heat pretreatments. Further micrography and anatomical studies of both the plants were also made.