Archives-December 

A series containing twelve substituted styryl 2-pyrrolyl ketones have been synthesized by solvent free fly-ash:H2SO4 solid acid catalysed crossed aldol condensation. These chalcones were characterized by their physical constants and spectral data. The IR and NMR spectral frequencies of ?COs-cis and s-trans, deformation modes of ?CHip, op, CH=CHop and C=Cop(cm-1), ?H and ?C of ?, ? and CO(ppm) and the electrochemical reduction potential and currents of carbonyl and vinyl groups of synthesized chalcones were correlated with Hammett substituent constants, F and R parameters. From the results of statistical analyses the effects of substituents on the group frequencies and electrochemical functionalities have been discussed. The antimicrobial activities of all chalcones have been studied using Bauer-Kirby method.

In recent years with the advent of technology in people’s life, the use of audio visual material to assist learners in their language learning experience especially EFL learning contexts has been integrated into the curriculum design in many countries. The use of video as an audio-visual aid in foreign language classrooms with the emphasis on communicative language teaching has attracted the attention of language teachers, SLA researchers as well as learners and it is apparent that the use of such useful learning tool can be a great help for language learning. In this study the effect of frequent exposure to audio- visual material on Iranian EFL learner shave been investigated. In order to conduct the study 40 Iranian intermediate students have been selected out of a pool of 200 based on their result in a placement test. The selected participants were randomly assigned into two groups of experimental and control each containing 20 learners. The listening ability of the participants were tested by a pre-test before start of the treatment and no significant difference have been observed. After a period of two month in which the experimental group received treatment of exposure to authentic audio visual material a round of post-test was administrated and the scores obtained from two groups was compared using a t-test. It was observed that the experimental group who have received the treatment achieved significantly better scores. It was concluded that frequent exposure to audio visual material has a positive impact on improvement of learners’ listening ability.

Automatic annotation is actually a classification of medical images, using global and local features of images, IRMA standard code are extracted for them which consists of four data axes techniques of image providing (modality), direction, anatomy, and biological system. Recent researches show despite the fact that classification with high accuracy has been achieved good results but cannot always be optimal for all features of images. Therefore, in this paper, in order to improve the efficiency of automatic annotation system of medical images in terms of classification accuracy, the combined classifiers votes’ technique (Majority Voting) and Gabor filter feature in HSV color space for images has been used. The results are promising and improved performance show the improvement of the quality of the proposed system. In fact, in addition to high speed compared with previous methods, it has been achieved good accuracy as much as 75.1 percent

Nowadays the international attempts to conserve the environment are mainly related to some issues such as; biologically diverse and reasonably non-touched ecosystems. Beside, the location of people live and work, for a small green space in cities and to their profits to people, much less attention is paid to this kind of nature. Much evidence show that the attendance of natural areas leads to the quality of life in many methods. Moreover, many environmental services, urban nature prepare essential social and psychological profits to human society that improves the lives of human senses and emotions. The major objective of this paper is to examine the significance of the urban nature of the welfare of the citizens and the sustainability of the city they live. Some outcomes of a survey conducted between visitors of a city park in Qazvin (The Mellat) are showed and argued. The issues examined concern the motives of people for the urban nature, the emotional dimension involved in the experience of nature and its significance for the broad welfare of the people. The results prove that the experience of nature in an urban environment is a resource of useful emotions and positive services that complete significant immaterial and non-consumptive human requests.

Leech therapy is experiencing revivification in health care today, primarily in pain management for knee osteoarthritis and in modern science in plastic and reconstructive surgery(Sandhana Karma) as a treatment of venous congestion which can threaten positive surgical outcomes. Similarly leech therapy in wound care is an emerging bio surgical entity which is assuring promising results in the treatment of chronic non healing wounds(Dushta Vrana). The first description of leech therapy, classified as bloodletting, was found in the text of Sushruta Samhita (dating 800 B.C.) .Diseases where leech therapy was indicated were skin diseases, sciatica, and musculoskeletal disorders like Arthritis (Sandhigata Vata)etc. Acharya Sushruta has mentioned Avsechana Karma or Raktamokshana as one of the important procedure in the treatment of Vranashopha. Leech therapy (Jallaukavacharan) is said to be of prime importance due to its multifold actions and indications being an anushastra ie a para surgical tool and which can be used in children, weak persons or in the absence of surgical instruments. Such is the legacy of bloodletting by leech in Ayurveda. It has been observed that post graduate & under graduate students and paramedical staff have had no formal training in administering the therapy or in maintaining the medicinal leeches i.e. Hirudo medicinalis, the species of freshwater amphibian worm used therapeutically. Yet students and paramedical staff are expected to participate in this therapy in a variety of clinical settings, in variety of diseases, and hence can use the guidelines given in the article for the safe and effective use of the leeches in treatment. Keywords- Leech Therapy, Raktamokshana, bloodletting, Avsechana Karma, Anushastra, Vranashopha, Inflammation

Radiation and radioactive isotopes constitute a natural part of our environment. High concentrations of these radioactive isotopes in the environment can be a threat to our health. The largest fraction of the natural radiation we receive comes from the radioactive gas radon, which disintegrates by emitting alpha particles. Although it cannot be detected by human senses, radon and its radioactive by-products are a health concern because they can cause lung cancer when inhaled over many years. Radon is present everywhere in the rock, soil, water and air because of the ubiquitous nature of its parent radioactive element uranium in geological terrain. In this paper, we highlight the need for measurement of radon in the environment, and the possible health hazards due to radon gas, especially from building materials and water in Ghana. We present preliminary results from our recent work and suggest remedial measures to avoid high intake of radon. In the preliminary results, using the BEIR III model to calculate the distribution of lung cancer cases per year in Dome in 2009 between the different age groups from radon exposure of 2.03 WLM per year gave a total of 5 cases per year.

We evaluate monitory cost to explore the reasons and find that using venture capitalists as specialized investors with lower monitoring costs than other institutional investors, earnings management is less likely for low investor beliefs but more likely for high investor beliefs for VC-backed firms relative to non-VC-backed firms. Numerous studies conclude that firms manage earnings upward prior to issuing equity Securities in an effort to minimize the dilution effect on existing shareholders (Theo, Welch and Wong, 1998a and 1998b). Erickson and Wang (1999) extend this line of reasoning to corporate mergers in which the acquiring firms pay for the target with stock. Similar to an equity offering for cash, they suggest that acquirers inflate earnings prior to the merger in order to increase stock prices, and thereby reduce the number of shares they must exchange in the stock swap. We can also obtain the same results as former study that auditor’s quality negatively related with earnings management. Considering above consequence, we documents IPOs firms engaged in managing earnings with high investor beliefs have an influence on the long-run abnormal stock return performance. These findings have implications for investors, firms, and accounting standard setters. More prudential monitory is important during market booming periods. We founded that firms have incentives to engage in earnings management before the announcement date of private equity offerings. The manipulation direction may be upward or downward according to the types of placement. Our empirical results indicated that management tended to manage reported earnings upward when the private placement was subscribed by non-insiders; whereas management tended to downward manage earnings when the private placement was subscribed by insiders.

In this study, the role of migration and its impacts on sustainable development in urban and suburban areas have been investigated. In order to perform this, by reviewing the theoretical and empirical literature of migration and sustainable urban development and the role of migration on sustainable development of mother city and its relationship with the suburbs, in order to understand and recognize the migration and urban sustainability, by reviewing the quantitative and qualitative indicators, (economic, social, environmental) factors are discussed. The research is descriptive, analytical and inferential. Also qualitative and quantitative indicators have been examined.

When I was still a teenager, in my fourteens, my father called me to his watch-making workshop, sat me down on the top of his lap swinging to the left and to the right along with the tick-tack’s sound of the grandfather clock’s pendulum coming from the furthest corner of the room.

Inhibition of copper corrosion by some thiazolidine derivatives in 1 M HNO3 was inspected by" WL (weight loss),(EIS) electrochemical impedance spectroscopy, (EFM) electrochemical frequency modulation and potentiodynamic polarization measurements". The inhibition effectiveness expanded by the expansion in the concentration of inhibitor and deceased when temperature increased. It is clearly that these mixes work as mixed type inhibitors and that was proven by Potentiodynamic polarization study. These inhibitors whose adsorption was found to comply Langmuir adsorption isotherm. When a number of unique strategies were in great understanding, the outcomes resulted. Relationships of quantum structure-movement have been utilized to examine the molecular structure impact on the inhibitors efficiency. The surface morphology of copper specimen was explored by scanning electron microscopy (SEM).