IMPACT : International Journal of Research in Engineering & Technology

1-6

Authors: ZEESHAN AHMAD ABBASI

For Design And performance evolution of wireless digital communication system the most important part is the simulation of wireless channel as whole performance of the system is depend upon the channel. In this paper the performance of three wireless channels, AWGN, Rayleigh and Rician have been evaluated. These three channels are most widely used in Single Input Single Output (SISO) and Multiple Input Multiple Output (MIMO) communication system. The performance is evaluated on the basis of Bit Error Rate (BER) versus signal to noise ratio (SNR) . The stimulation results shown the performance of different channel models based on BER at different SNR. The Rayleigh channel model is the most suitable model for urban areas as it is the model which simulates a channel with no Line of Sight (LOS) path and is the most difficult environment

13-20

Authors: N. MURALIMOHAN, V. PREMKUMAR, L. PARVATHI, B. SUDARSHAN & N. MARIMUTHU

Water is one of the primary sources for the existence of life on the earth. But we are neglecting the importance of quality in water and thereby polluting it for ages. To preserve the quality of water and to enable the aquatic life we must treat the waste water before letting them into the resources. Out of natural and artificial resources for the treatment of polluted river water, we can use the natural resources these by preserving the economic resources of the country. Cauvery is one of the major rivers in South India and is being polluted abnormally due to dyeing industries, paper industries, discharge of drainages etc., Thus, Artificial Floating Island Technique can be effectively used to reduce the organic and inorganic pollutants in river water and also to enhance the growth of aquatic ecosystem

1-6

Authors: Inácio M. Martin, Marcelo Pego Gomes,Bogos N. Sismanoglu & Thiago A. Santos

The spectrum of low energy gamma rays (0.2 to 3.0 MeV)was measured in four points on the region of São José dos Campos, SP, Brazil. The distance of the four points measured it was less than 2 km one from another and in one location point 2 and 3, localized inone tour, it was measured in ground level and at 25 meter high. The monitoring of spectrum flux shows the strong presence of decay products of Rn-222, Rn-220 and potassium (40K) on the four places. The integrated counts rates in the same interval of energy and each place shows influence of geological parameters and the removal of 210Pband 210Poby fallout were taken also into account.

17-26

Authors: Y. P. Singh & Monika Shekhar Gupta

The temperature inside a building heavily depends on the incident sun light through the window. A solution to control the building temperature is to dynamically control the transparency of the windows in its window. Smart glass, E- Glass, or switchable glass, also called smart windows or switchable application to windows or skylights, refers to electrically switchable glass or glazing which changes light transmission properties when voltage is applied. "Smart" window technology is the most promising option and a lot of research is being done in this field that can both save and generate energy, and may ultimately reduce heating and cooling costs for buildings. While allowing us to feel close to the outside world, windows cause heat to escape from buildings in winter and let the Sun's unwanted rays enter in summer. This has sparked a quest for "smart" windows that can adapt to weather conditions outside. In this paper we discussed about how smart windows are limited to regulating light and heat from the sun, allowing a lot of potential energy to escape."The main innovation of this work is that it developed a concept smart window device for simultaneous generation and saving of energy.

43-46

Authors: G Naveen Kumar

Many types of voltage stabilizers are available in market. In these stabilizers the output is changed manually with switch to maintain the output voltage constant. During the peak period this manual operation of stabilizer has to be done frequently. This paper presents a low cost servo controlled voltage stabilizer which rectifies this problem.

53-62

Authors: K. ASUDULLAH KHAN

The topic entitled the ‘Road safety Lapses and its remedies A case study of Safety Audit’ about issues involved during processes of investigation of Road safety norms compliance as per specifications and recommending appropriate remedial measures. It also explains about Safety requirements apply to all phase of construction, operation and maintenance with emphasis on identification of factors associated with accidents. It also gives attention towards Safety requirements include measures associated with traffic management and regulation such as road sign, pavement marking, traffic control devices, road side furniture, highway design elements, enforcement and emergency response. KEYWORDS: Road Safety, Signage, Safety Regulations, Traffic Management

1-6

Authors: TUKENOVA LYAILYA MURATBEKOVNA & SKAKOVA AIGUL JUMAKHANOVNA

In this article we examine the method of fictitious areas for the non-liner hyperbolic equations. The estimation of rate of convercence decisions is recaived. In some cases the unimproved estimation of convergence rate of the decision is received.

25-36

Authors: Shatha Q. Jawad Amina N. Al-Thwaini & Salwa Sh. Abdul-Wahid

Attention Deficit Hyperactivity Disorder is a multifactorial disorder which results from combination of environmental and genetic factors. If children with ADHD are identified early and appropriate interventions are made the problem is likely to be mitigated. The study was carried out to determine the frequencies of ADHD among Iraqi primary school pupils, and recognize the role of3UTR-VNTR ofDAT1 genein ADHD. The study sample included 1431 school pupils (777) males, and (654) females with age ranged between 8-12 years, selected from nine primary schools, at Baquba city. Revised version of RCBQ has been used as a means for identification of children with ADHD and prosocial (control).Genetic investigation were performed for Variable Number Tandum Repeats of 3UTRDATpolymorphysimsand the sequencing carried out in BioScience company (Nottingham,UK), association between ADHD and alleles was tested by odd ratio, the magnitude of this association was estimated by 95% confidence interval. The results revealed that 16.8% (241/1431) of those pupils have ADHD of combined type, males to females ratio was 2.2:1. This disorder was distributed highly among the age group 10-12years. Out of 241 ADHD pupils, 118 (49%) suffer ADHD of combined type comorbid with aggressive symptoms, 65.3% (77/118) of them were males and 34.7% ( 41/118) were females.The VNTR ranged between 3 to11 repeat, six alleles were identified 3,7,8,9,10 and 11R, while 4,5,6 R not found in this study. There was highly significant increase in the frequency of 10 R allele that found in 30%, 16% of ADHD and control groups respectively ( OR=0.412, p<0.01), also there was highly significant increases in the frequency of the genotype 9/10 among ADHD group (OR=1, p<0.01), which showed significant association as a risk effect, while 9R and 10/11 genotype was highly significant increased in control group (OR=1, P<0.01), revealed significant association as a protective effect. Conclusion: The frequency of ADHDsymptoms among primary school children in Baquba city is high and appear in males more than females.This study showed that 10R and 9/10 genotype of DAT1 3᾽UTR significantly associated with ADHD while 11R and 10/11R genotype significantly associated with normal control children.

47-74

Authors: Harvey Hyman, Rick Will & Terry Sincich

This paper tells the story of a series of experiments designed to explore the relationship between behavioral preferences and user performance in information retrieval projects. The experiments are a set of monitored user interactions with a randomly selected set of documents from a large corpus. Users’ behavioral preferences are recorded in a pre-test questionnaire, and their subsequent sessions are measured against standardized IR performance metrics of Recall and Precision. User IR performance is analyzed for significant correlations with a set of behavioral scales. The scales are designed to measure user preferences in the areas of tolerance for ambiguity, locus of control, innovativeness in technology, and dispositional innovativeness. Our findings support that a relationship exists between IR performance measures of recall and precision, and a user’s behavioral preferences. Our findings also suggest that behavioral preferences may be used to create a predictive model to forecast a user’s IR performance. These findings can be applied to organizations that prioritize strategies depending on the orientation of the searching and sorting goals for an electronic document collection being reviewed

99-102

Authors: SUWARNATORGAL

Vibration is always present in any operating machine and a vehicle is not an exception. Focusing on ride comfort of Occupants in a Bus, the vibration inputs coming directly from seat as well as the rattling body interiors are a major contributor to discomfort and fatigue. Issues like shaking rear view mirror combined with this fatigue, are also frustrating for Driver and is potential contributor to the accidents. Main objective in this paper is to study the points where the vibration in a passenger bus is occurring and how it gets transmitte

1-8

Authors: MODDASSIR KHAN NAYEEM & AKIF RAHMAN SHIHAB

Many industries are running their industry despite of huge wastage and production loss. There are many reasons of being closed down of these industries. Layout is one of the reasons. A proper layout can minimize the production loss and on the other hand an improper layout can increase the production loss. Layout refers to the specific configuration of physical facilities in an organization. Objective of layout strategy is to develop an effective and efficient layout that will meet the firm’s competitive requirements. This project focuses on present layout and improvement of present layout of a local tube light company (Eastern Tubes Ltd.). During this project, the existing layout was studied and the problems of the existing layout were identified. Idle time and task time were calculated to find out the efficiency of existing and proposed layout. Key factors related to the layout of production floor were studied and by considering those factors, a new redesigned layout of the production floor was proposed in our study report

1-8

Authors: ANKAMMA RAO J, BIZUAYEHU BOGALE, JEMAL MOHAMMED AMIN & TSEGAYE NEGASH GIZAW

Nowadays, power supply has become a business asset. The quality and reliability of power system needs to be maintained in order to obtain optimum performance. Therefore, it is extremely important that transmission line faults from various sources to be identified accurately, reliably and be corrected as soon as possible. This paper presents fault location algorithm based on date measured at both ends of two terminal single high voltage transmission line. MATLAB/ Simulink software was used to implement these algorithms. The simulation results demonstrate the validity of the suitable fault location method in 400KV transmission line

25-30

Authors: ABHISHEK DAVID JOHN & M. ARTHI

Public speaking skills are considered valuable in today’s competitive environment. Most poor presenting is the result of bad habits such as not making eye contact with the audience or muttering to oneself instead of speaking clearly. The speaker may not even realise that they are doing these things. Therefore, it is important to assess the quality of one’s speech with the help of a friend in order to be aware of the mistakes committed when delivering a speech. Based on parameters such as voice, pace, clarity and modulation one can assess the quality of the speech delivered and can improvise in the problematic areas. Proper utilization of speaking situations and tools used while speaking can help in the rendering of a proper speech and communication of the message clearly to the audience. Most aspects of communication can be improved rapidly with practice