bluuebunny/crossref_metadata_2025 huggingface dataset:
Towards Leadership Marketing
Authors: Ozuem Wilson , O'Keeffe Alina
Published: August 2014

In an era when collaboration is key to business prosperity, the ability to develop one truly coherent and agile brand lived by its employees and delivered to external stakeholders has become extremely challenging. Unity between the internal brand and a company's external image, when change is the only constant, has nearly vanished. The marketing function is frequently being underemphasised at the board level. Furthermore, the existing approach to leading business devalues the importance of marketing and its role in leading organisational change. This chapter is about how marketing can partner with organisational leadership for a mutually beneficial exchange of skills and capabilities in order to be able to reinvent organisations rapidly enough to cope with shifts in the external business environment and create a sustainable future for the business. From an interpretivist perspective, this chapter explores the novel concept of “leadership marketing,” which challenges the conventional view of marketing and leadership as two separate fields and offers a holistic approach for business management and brand alignment.
Managing Brands at Risk
Authors: Okan Elif Yolbulan
Published: August 2014

Since crises have become an inevitable, natural feature of the business world, managing brands during crisis has also become an important source of competitive advantage. Thus, there is a growing need to understand determinants of crisis, which have become an integral part of today's world. The aim of this chapter is to explain the determinants of successful brand management during crises based on the case of Turkey. Crises may arise for various reasons, such as natural disasters, accidents, financial/political/product harm-related problems, product recall incidents, and many others. Since brands are very affected by many dynamic forces—political-economic-social and technological—brand managers need to be prepared to overcome crises without harming the brand equity. Moreover, the integration of brand management theory, which originated and was dominated by Western researchers, with recent case examples from an emerging country, constitutes the originality of the chapter. In this chapter, two boycott cases, an airplane disaster case and a product recall case, from Turkey are summarized to contribute to the existing Western literature.
Luxury Brand Perception and Consumer Attitude to Extended Luxury Brand
Authors: Zhang Hao , Zhao Xiaoyu , Lee Changhan
Published: August 2014

South Korea, as one of the largest economies and emerging markets in the world, continues to be attractive to luxury companies. There is dramatic increase in purchasing power for luxury products in Korea. This chapter discusses Korean consumers' value perception of luxury products and their influences on consumers' attitudes to extended luxury brands. The result shows that functional dimension, financial dimension, social dimension, and brand dimension can significantly influence consumers' attitudes. At the end of the chapter, conclusions and implications are discussed.
Modernization, Consumer Personalities, and Global Brand Attitudes
Authors: Li Qianqian , Wei William , Xue Qiuzhi
Published: August 2014

A key issue for brand management in emerging markets is to understand the uniqueness and trends of consumers' global brand attitudes. This chapter proposes that modernization brings cultural transformation represented by individual personalities—including global identity, self-construal, and social desirability—thus affecting consumer global brand attitudes. Using data collected from 829 samples in 29 provinces in China, this chapter finds evidence for several propositions. Based on empirical analysis and findings, the authors make recommendations for international and local brand managers. Further research directions are also discussed.
“The Illness that Dare Not Speak Its Name”
Authors: Brookfield Stephen D.
Published: August 2014

Depression is something variously estimated to afflict between 5 and 10% of the North American adult population at any particular time. As such, it represents a major community health issue. This chapter uses an auto-ethnographic approach to analyze the adult learning tasks associated with dealing with depression. After situating his own experience as a person who suffers from depression, the author uses his narrative to analyze four learning tasks: learning to overcome shame, learning to engage in ideological detoxification, learning to normalize despair, and learning to calibrate treatment. Central to each of these tasks is the act of public disclosure. The chapter ends by suggesting directions for future research in this neglected area of adult education.
Technology Impact on New Adult Behavior about Health Information
Authors: Farmer Lesley
Published: August 2014

New adults, between 18 and 25 years old, need and want information about health issues. Even though new adults tend to prefer asking people for help, increasingly they access digital resources because of the Internet's availability, affordability, and anonymity. Health information interests vary by age, gender, social situation, and motivation. Several concerns also impact how new adults access and seek that information. This chapter discusses several issues related to new adult technology use for seeking health information and offers recommendations to insure optimal community education and services to address health information needs of all new adults.
Learning with a Curve
Authors: Cameron Paula S.
Published: August 2014

This feminist arts-informed study investigates “depression” as transformation in the lives of young rural women in Nova Scotia, Canada. The author facilitated interviews and zine workshops with four young women who experienced severe depression in their early 20s and remain “angled toward it.” Drawing from Transformative Learning theory, the author asks: How does lived experience of severe psychic suffering affect the “habits of minds” (Mezirow, 1978) of young women? By doing so, the author responds to calls for adult education research on mental health and the intersections between women's emotions, bodies, transformative learning, and the arts. The author addresses the dearth of research on mental illness and transformation and offers preliminary implications for Transformative Learning theory.
Self-Directed Learning in Family Medicine
Authors: Barrett Theresa J.
Published: August 2014

Self-directed learners are able to recognize their learning needs, set their learning goals, identify the resources necessary to accomplish those goals, implement learning strategies, and evaluate the results of their efforts (Brockett & Hiemstra, 1991). Self-directedness is a skill that many adult learners possess. In an age when biomedical knowledge is increasing at a pace never before seen in human history, being a self-directed learner is not just a necessary skill, it is a critical one for family physicians. This chapter provides a brief overview of several self-directed learning models and the characteristics of self-directed learners, discusses self-directed learning in the context of continuing medical education, and provides an assessment of family physicians as self-directed learners.
Adult Education
Authors: Ellington Linda
Published: August 2014

This chapter analyzes literature in adult education at the intersection of health and the ageing society. In a contemporary context characterized by movement towards ageing societies, a current challenge of adult education planning can be attributed to the shifting global demographic profile; migration has resulted in higher percentages of older people throughout most of the world, as well as greater diversity within the older population (Grenier, 2012). Education about adult health must go beyond the traditional practice of knowledge dissemination, not only because of the sheer size of the 65+ age cohort, but knowing that this particular population does not want to lose their locus of control in their independent status within their society. Established literature illustrates the significance of adult health education and highlights the importance of medical, sociology, psychology, and social policy for not only stimulating the interest of senior adults, but of society in whole.
Using Information Technology to Spread Awareness about Communicable Diseases
Authors: Vachhrajani Twiesha , Rao Lavanya , Rao H. R.
Published: August 2014

Over time, changes in lifestyles, surroundings, and presence of parasites in the developed and developing world has resulted in new strains of various communicable diseases such as AIDS, tuberculosis, malaria, etc. Even though the global average of diseases may be quite low, the concentration in certain countries is much higher. In developed countries, information technology has proved to be an indispensable tool to spread awareness regarding these communicable diseases; however, most developing countries lack the infrastructure needed to use these same resources to educate people about the prevention, symptoms, and treatment available. This chapter makes the following contributions: first, it outlines some of the critical challenges regarding the spread of communicable diseases. It then identifies and summarizes the various information systems strategies used in developed and developing countries. The conclusion ties these together and offers suggestions to further curb the spread of communicable diseases in developing countries.
Human Patient Simulations
Authors: Onovo Grace N.
Published: August 2014

The relationship between self-efficacy (self-confidence) and anxiety levels, and the use of Human Patient Simulations (HPS) as a teaching-learning strategy, has not been sufficiently studied in the area of clinical nursing education. The purpose of this chapter is to evaluate the self-efficacy/self-confidence and anxiety levels in clinical skills performance of undergraduate nursing students, pre-use and post-use of Human Patients Simulations (HPS), as a teaching and learning strategy in maternity nursing. The study used a quantitative, pre-experimental, one group study design with a pretest and posttest experiment in data collection. The findings concluded that HPS reduced anxiety and increased self-efficacy/self-confidence in clinical skills performance and decision-making of the participants. In addition, the study found that the participants had difficulties in tasks performance with the following action verbs associated with the cognitive domain of Bloom's taxonomy. The verbs were “identify,” “apply,” and “analyze.”
The Cost of Convenience
Authors: Miles Jessica
Published: August 2014

Adult education tools have transformed over the years to become very Internet-based. Distance education courses represent one of the fastest-growing sectors within higher education and as an elected form of education for adult learners. Nontraditional students play an important role in the continued growth of this educational modality and are using distance education courses to further their knowledge, skills, and careers. Additionally, this tool is enabling adults who might otherwise be unable to participate in learning opportunities because they are place-bound to have access to a wealth of information and courses available through distance education courses. In regards to adult health, research has identified potential impacts on academic success including sleep quality and external responsibilities, such as work and caretaking. Nontraditional, adult students are increasingly pressured with greater external responsibilities that in turn may affect their sleep quality, creating a sort of chain reaction of potential academic obstacles. Raising awareness of these health issues and impacts is important in setting up adult learners, especially those taking distance education courses, with the greatest opportunities for academic success. This chapter explores distance education.
Building Multi-Dimensional Cube to Analyze Public Examination Results: A Business Intelligence Approach
Authors: Abraham Navamani J. Macklin , Kannammal A. , Jeba Thangaiah P. Ranjit
Published: August 2014

In recent years educational data mining and data warehouse has become one of the challenging research fields. It is used to turn the raw data available in educational field into actionable information. Educational data can provide improved understanding of students’ knowledge and better assessments of their progress. Educational data mining and warehousing could help educational government organizations in taking timely and data analysis based management decisions, thus contributing to gain competitive advantages in their successful policy framing. This paper focuses on the research activities for building data warehouse/data mart to store and analyze the public examination results of higher grade students by Directorate of Government Examinations belonging to Tamil Nadu, India. The data warehousing concept comprises of architectures, tools, and algorithms for bringing together data from various sources into a single repository and making it useful for the management to directly query and extract useful information for analysis. In this paper the need of data warehouse / business intelligence for a government educational organization has been explored.
Investigation of Modified Generalized Interline Power Flow Controller (GIPFC) and Performance Analysis
Authors: Saraswathi Ananthavel , Sutha S.
Published: August 2014

Nowadays in the restructured scenario, the main challenging objective of the modern power system is to avoid blackouts and provide uninterrupted quality power supply with dynamic response during emergency to improve power system security and stability. In this sense the convertible static compensator (CSC) that is the Generalized Inter line power flow controller (GIPFC), can control and optimize power flow in multi-line transmission system instead of controlling single line like its forerunner FACTS (Flexible AC Transmission System) controller. By adding a STATCOM (Static synchronous Shunt Converter) at the front end of the test power system and connecting to the common DC link of the IPFC, it is possible to bring the power factor to higher level and harmonics to the lower level and this arrangement is popularly known as Generalized Inter line power flow controller (GIPFC). In this paper a new concept of GIPFC based on incorporating a voltage source converter with zero sequence injection SPWM technique is presented for reinforcement of system stability margin. A detailed circuit model of modified GIPFC is developed and its performance is validated for a standard test system. Simulation is done using MATLAB Simulink.Index Terms—Convertible static controller, Flexible AC Transmission System (FACTS), Generalized Interline Power Flow Controller (GIPFC),STATCOM, SSSC, Reactive power compensation.
Modelling, Simulation and Implementation of the Three-Phase Fuzzy Based Shunt Active Filter for Limiting the Total Harmonic Distortion
Authors: Zahira Rahiman , Peer Fathima A. , Muthu Ranganath
Published: August 2014

This paper presents the fuzzy logic controller for shunt active power filter used to compensate harmonic distortion in a three-phase system. The shunt active filter employs a simple method for estimating the reference compensation current. A fuzzy logic based current control strategy is used to regulate the filter current and hence ensure harmonic free supply current. Classic filters may not have satisfactory performance in fast varying conditions. However, an auto-tuned active power filter gives better results for harmonic minimization and power factor improvement. The proposed fuzzy based shunt active filter maintains the THD well within IEEE-519 standards. The validity of the presented approach in harmonic mitigation is verified by simulation results in MATLAB/ Simulink and hardware prototype.
Continuous Wavelet Analysis of the Breathing Sounds of Obstructive Sleep Apnea Patients and Normal Subjects during Wakefulness
Authors: Premkumar R. , Arun Chokkalingam , Divya Ramakrishnan Sai
Published: August 2014

Obstructive sleep apnea (OSA) is the most common type of sleep apnea and is caused by obstruction of the upper airway. Its distinctive feature is occurrence of repetitive pauses in breathing during sleep, due to intermittent relaxing and blocking of the patients airway by the throat muscles. Continuous such actions might narrow down the throat or may completely block it. These actions cause more difference in breathing sounds and are usually associated with a reduction in blood oxygen saturation. The breathing sounds of the patients with and without obstructive sleep apnea were recorded using a non-invasive, low-cost sensor during wakefulness in supine (lying) position and Continuous wavelet 1-D analysis was performed on those signals.
Estimation of Surface Runoff Using Soil and Water Assessment Tool (SWAT)
Authors: Kaviya Kanagaraj , Ramalingam M.
Published: August 2014

Geographical Information technology (GIS) is being widely used for the assessment of natural resources. This paper deals with the usage of SWAT as a modelling tool with the integration of ARCGIS for the estimation of surface runoff on a watershed basis. Spatial maps such as elevation information (SRTM data of 90M resolution), soil and land use is used to setup the model. An extensive effort will made in setting up a Indian climate database which consists of numeral climate records containing good quality data. The Soil Conservation Services (SCS) method has been used to assess the surface runoff from the watershed basin
Speckle Suppressing Improved Oriented Speckle Reducing Anisotropic Diffusion (IOSRAD) Filter for Medical Ultrasound Images
Authors: Rose Jemila R. , Allwin S.
Published: August 2014

— Ultrasound imaging is the most commonly used imaging system in medical field. Main problem related to this imaging technique is introduction of speckle noise, thus making the image unclear. The success of ultrasonic examination depends on the image quality which is usually retarded due to speckle noise. There have been several techniques for effective suppression of speckle noise present in ultrasound images. The filtering techniques considered include anisotropic diffusion, wavelet de-noising, and local statistics. Comparison of the filters is based on their application of objective quality metrics, which quantifies the preservation of image edges, overall image distortion, and improvement in image contrast. The computational analysis quantifies the number of operations required for each speckle reduction method. A speed-accuracy analysis of various methods for anisotropic diffusion is included. It is concluded that the optimal method is the OSRAD (Oriented Speckle Reducing Anisotropic Diffusion) filter. The proposed approach technique deals with an improved OSRAD filter which gives an efficient result other than the previous filters by analysing the quality metrics.
A Novel Neuro Fuzzy Based Control Strategy for Variable Speed Wind Energy Conversion System
Authors: Amrutha S.G. , Ramesh K.
Published: August 2014

— This article describes a novel control strategy of a stand-alone Self-Excited Induction Generator (SEIG) driven by a variable speed wind turbine. The conventional Wind Energy Conversion System (WECS) controller is restructured by using a Current Controlled Voltage Source Inverter (CC-VSI) with an Electronic Load Controller (ELC) is connected in parallel with the main consumer load to the AC terminals of the induction machine. The proposed control strategy has Neuro-Fuzzy Logic Controller (NFLC) and Hysteresis Current Controller (HCC) to extract the maximum available energy from the wind turbine as well as to regulate the generator terminal voltage simultaneously against wind speed and main load variation. The control parameters are derived according to steady state characteristics of the proposed system. The proposed system is modelled and simulated with the help of SimPower Systems block sets in MATLAB
PIR Regulator Using DTC for DFIG during Unbalanced Grid Voltage Conditions
Authors: Ramkumar A. , Durairaj S. , Arun N.
Published: August 2014

This paper presents a PIR regulator using direct torque control strategy of grid connected wind turbine driven doubly fed induction generators (DFIGs) when the grid voltage is unbalanced. Under the unbalanced grid voltage condition, the stator voltage and current quality is strongly affected due to the negative and distorted components. It will be reducing the performance of other normal loads connected to the DFIG. That control scheme consisting of indirect matrix converter using DTC. To verify the value of the proposed control strategy, simulation results with 500 MVA DFIG topology are presented and discussed in the paper. Finally,the simulation studies are carried out on a 500 MVA wind-turbine driven DFIG system under unbalanced grid voltage conditions. All the results are validated by using PSCAD simulation.
Performance Analysis of Minimum Distance Classifier and Clustering Algorithm in CBIR
Authors: Rose J. Ann , Seldev C. Christopher
Published: August 2014

Content-based image retrieval (CBIR) system can be used to effectively and precisely retrieve the desired images from a large image database, and the development has become an important research issue.Statistical methods like, gray level co-occurrence matrix (GLCM) and the autocorrelation function are used to extract texture feature. Region-based methods utilize information from both boundaries and interior regions of the shape. Shape features like perimeter, area, centroid, circularity, solidity based on region can be extracted in the feature space. Similar images can be retrieved using minimum distance classifiers with and without clustering algorithm .Time complexity and the retrieval efficiency has been analyed and compared on both the methods. The experiments have been conducted on MPEG-7 dataset.
Investigation on Harmonic Spreading Effect of Conventional and Innovative Multi-Level Inverter Control Strategies
Authors: Bright Shibu J.V. , Suba V. , Ramkumar S. , Jeevananthan S.
Published: August 2014

The pulse width modulation (PWM) strategy employed in the voltage source inverter (VSI) not only control the magnitude of the output voltage but also the quality. Performance evaluations of such strategies are done in terms of fundamental voltage, total harmonic distortion (THD), switching losses etc. (primary indices) and also in terms of acoustic noise, electromagnetic interference (EMI), harmonic spread factor, distribution of harmonic power etc. (secondary indices). Multilevel inverter (MLI) has become unanimous choice in medium and high power applications due to their superior performance compared to three level inverters. The conventional Sub-Harmonic PWM (SHPWM) scheme and its variations offer the output voltage spectrum with high intensity harmonic components around the switching frequency; it will end with cluster harmonic with high acoustic noise. The first objective of this paper is to investigate harmonic spreading effects of existing multilevel inverter (MLI) strategies. Secondly the developing innovative PWM strategies for MLIs based on modified reference and carrier functions, which were proved for superior the primary indices at three-level VSI. Thorough simulation study of Pulse width modulation strategies such as SHPWM, inverted sine carrier PWM, MWM PWM, third harmonic injection PWM, triplen harmonic injection PWM, analog space vector PWM, trapezoidal PWM and discontinuous PWM for a cascaded multilevel inverter, are presented with results of primary and secondary indices. Hence, the PWM strategies of MLI are evaluated for harmonic spreading effect first time and a guide line for a beginner to select the PWM scheme for MLI fed drive systems is stenciled.
Minimize the Replication for Secure Cloud Data Storage Systems Using Error Correction Codes
Authors: Sahaya Stalin Jose G. , Seldev Christopher C.
Published: August 2014

Cloud data centers should be flexible and available to the data forever. The replication method is used to achieve high availability and durability of cloud data center, if there is any failure to recover the messages from the cloud databases. The concern of this replication technology is that, the replica size is equal to the size of the original data object. When Error Detection Schemes were used, there is a reduction in the number of cloud distributed storage systems. The scope of this paper is to store the data efficiently in cloud data centers unlike the previous schemes which used erasure codes such as Reed Solomon codes only with a view to store data in datacenters. This paper proposes to encrypt the message using DES and to encode the message using Reed Solomon code before storing the message. Storing time is convincingly good in Reed Solomon code when compared with tornado code.
Shadow Removal Using Inpainting and Interpolation Technique
Authors: Lekshmi Ajayan , Seldev C. Christopher
Published: August 2014

Shadows are viewed as undesired information that strongly affects images. Shadows may cause a high risk to present false color tones, to distort the shape of objects, to merge, or to lose objects. This paper proposes a novel approach for the detection and removal of shadows in an image. Firstly the shadow and non shadow region of the original image is identified by HSV color model. The shadow removal is based on exemplar based image inpainting. Finally, the border between the reconstructed shadow and the non shadow areas undergoes bilinear interpolation to yield a smooth transition between them. They would lead to a better fitting of the shadow and non shadow classes, thus resulting in a potentially better reconstruction quality.
Efficient Colour Based Fire Pixel Classification Using Image Processing
Authors: Prema C. Emmy , Vinsley S.S. , Jegadeesh J. Shyam
Published: August 2014

In this paper an efficient colour based fire pixel segmentation using image processing is proposed. The proposed method adopts rule based colour model due to its less complexity and effectiveness. YCbCr colour space effectively separates luminance from chrominance compared to other colour spaces like RGB and rgb. The proposed method not only separates fire flame pixels but also separates high temperature fire centre pixels by taking in to account of statistical parameter of fire image in YCbCr colour space like standard deviation. The results obtained are compared with other methods in the literature and shows higher fire detection rate and less false detection rate. The proposed method can be used for real time forest fire detection with moving camera.
Web Log Mining to Enhance Surfing Experience
Authors: Mala A. , Ramesh Dhanaseelan F.
Published: August 2014

Analyzing navigation history of a web site and that of a user reported in log files and web click stream helps in determining the components that shall be needed in the near future and fetch them in advance. Identifying the frequently visited websites from such data enhances the process. Processing and analyzing the vast amounts of click stream data and web logs that are generated at very high rates in a smart and cost-efficient way is a daunting challenge to the data mining community. Mining frequent itemsets plays an important role in analyzing such data streams. In spite of the existence of many such mining algorithms, more time and space efficient algorithms for mining frequent patterns are the need of the hour and are attracting wide attention in web click-stream analysis in recent years. In this paper an effective algorithm for mining frequent itemsets from a time-sensitive sliding window is proposed. It is a one-pass algorithm that uses a circular queue to implement the sliding window. The time-sensitive sliding window stores the web click stream data of various sessions of the web users. The proposed one-pass algorithm, FIM_CQTimeSWin has three phases: representation of time unit, maintenance of the sliding window and generation of frequent itemsets in the current sliding window.
An Efficient Architecture for Flexible Divider Using Multi Modulo Prescaler
Authors: Anand G. , Vidhyalakshmi N. , Kavitha R.
Published: August 2014

In this paper, Based on the Pulse swallow topology a low power single phase clock multiband flexible divider is designed for frequency synthesizer.The modified divider has wideband multimodulus 32/33/47/48 and 64/65/79/80 prescalar and improved bit cell for swallow counter, it divide frequencies in three band ranges.
Numerical Modeling to Determine Test Conditions of Shear Blanking Test for a Hybrid Material
Authors: Sapanathan Thaneshan , Ibrahim Raafat , Khoddam Shahin , Zahiri Saden H.
Published: August 2014

A dedicated blanking test (DBT) was designed to measure the bonding shear strength of a metallic hybrid sample. To identify the required design parameters of the rig, a macro numerical model was developed using Abaqus Finite element (FE) package. Copper clad aluminum hybrid samples fabricated by an axi symmetric forward spiral composite extrusion (AFSCE) process were analyzed using the developed numerical model. The effect of the design parameters including sample thickness, blanking clearance and the die and punch fillet radii were determined to ensure a pure shear blanking along the interface. The numerical results showed that the sample thickness, clearance and fillet radii have a significant effect on the measured bond shear strength and the location of the failure. The required rig was designed and composite copper clad aluminum bonding shear strength was experimentally determined based on the numerical findings.
A Comparative Study on the Hardness of CrN, CrC and CrCN Coatings
Authors: Khanchaiyaphum Supakanya , Saikaew Charnnarong , Srisattayakul Parinya , Intanon Naphatara
Published: August 2014

Improving the surface quality of various machine components can extend their lifespans by several orders of magnitude. Thin film coating is one approach that can be used to enhance machine part surface quality. In this work, three different thin film coatings (i.e, CrN, CrC and Cr-C-N) were statistically compared for surface quality improvement of fishing-net weaving machine component, namely an upper hook. All coatings were deposited utilizing DC sputtering technique. The effects of coating types on hardness for both hardchrome and non hardchrome coated upper hooks were systematically investigated using one-way analysis of variance (ANOVA). Scanning electron microscope (SEM) and energy dispersive X-ray (EDX) were used to examine the surface quality of the machine component. This study found that CrN gave very high hardness values of 13.042 GPa for hardchrome coated upper hooks and 12.583 GPa for non-hardchrome coated upper hooks. However, the averages hardness of the hardchrome coated and non-hardchrome coated upper hooks were not significantly different at the 95% confidence level.
CNC Processing of Nurbs Curve Based on AutoCAD
Authors: Di Fei
Published: August 2014

In this paper, firstly the characteristics and discrete mathematics method of Nurbs curve were studied in-depth, and a NC processing method based on De Boor-Cox algorithm was presented. Then, dedicated data-processing software for NC system was developed with VC++ 6.0. This software has been well applied in practice production, and the production efficiency is improved as well.
Multi-Objective Optimization of CNC Turning Machining Parameters
Authors: Pradhan Sharad Kumar , Saini Surendra Kumar
Published: August 2014

An experimental investigation into CNC turning operation on Brass C36000 alloy as work piece material which is widely used for various industrial applications is performed. Multi objective optimization is carried out to find out the influencing machining parameters among spindle speed (rpm), feed (mm per revolution) and depth of cut (mm) for CNC turning of Brass C36000 alloy with surface finish and Material Removal Rate as performance parameters using Taguchi method. Taguchi orthogonal array [L27 (33)] is used for the experimental design. All experiments are conducted using EMCO Concept Turn 250 machine tool with carbide insert cutting tool. The optimization result shows that feed is the most significant turning machining parameter for surface roughness while depth of cut has high influence on material removal rate followed by spindle speed during CNC turning of Brass C36000 alloy. Above results is further validated using ANOVA approach.
Research on the Water-Based Hydraulic Vibration Test-Bed
Authors: Liu Qian , Liu Yuan Xun , Yang Cong , Li Xiao Lin
Published: August 2014

In this paper, the application background and function of vibration test is introduced. Besides, the composition and working principle of vibration test system is also introduced simply. Furthermore, the characteristic of water and oil is compared with each other in the paper. It is discussed if the water hydraulic is able to be used in the hydraulic vibration test-bed or not. The capability of hydraulic vibration test-bed based on water is simulated by Matlab software. The feasibility of this project is also analyzed.
Numerical Model for Prediction of Cutting Forces in a Vibratory Drilling Process
Authors: Glaa Nawel , Mehdi Kamel , Jaber Moez Ben
Published: August 2014

The drilling operation is considered by manufacturers as complex and difficult process (rapid wear of the cutting edge as well as problems of chip evacuation). Faced with these failures, manufacturers have shifted in recent years towards the drilling process assisted by forced vibrations. This method consist to add an axial oscillation with a low frequency to the classical feed movement of the drill so as to ensure good fragmentation and better chip evacuation. This paper presents a model for prediction of cutting forces during a drilling operation assisted by forced low-frequency vibration. The model allows understanding the interaction between the tool and the workpiece and identifying numerically the three-dimensional evolution of the cutting force components generated by the vibratory drilling operation. The effects of cutting parameters, tool parameters and those of forced vibrations on the cutting forces distributions will be discussed.
Early Diagnosis of Spalling in the Gear Teeth
Authors: Merzoug Mustapha , Ait-Sghir Khalid , Miloudi Abdelhamid , Dron Paul Jean
Published: August 2014

The monitoring and vibratory analysis of gear transmission allow the prediction of a possible malfunction and breakdowns. As the gear transmission product non-stationary signals its treatment is too difficult with the usual tools of signal processing witch can product errors in its interpretation. As the characteristics of gear frequencies are predetermined, it is proposed to monitor (fault identification) using wavelet analysis. To simulate the signal to be analyzed, we intentionally introduced a spalling defect. We chose the Daubechies wavelet type which are the most used in diagnostic. The aim of this work is to try to control the various parameters related to the wavelet analysis for reliable and inexpensive detection, i.e., the order of the wavelet and level decomposition. The approach witch was previously used for bearings, consists on observing the kurtosis for several orders wavelet based on the default severity..
Acoustic Optimization Design Method of Gear System
Authors: He Ze Yin , Lin Teng Jiao , Liu Wen , Liu Bo
Published: August 2014

The Response Surface Method (RSM) and Simulated Annealing Algorithm (SAA) are utilized to analysis and optimize the vibro-acoustic properties of gear system. A simple case is illustrated to demonstrate the capabilities of the acoustic optimization design method. The results show that the method of acoustic optimization design based on RSM and SAA can effectively reduce radiation noise, and provide theoretical fundament and guidance for further study on acoustic optimization design of complicated gear system.
Heterogeneous Speech Prediction Using LDA Classifiers
Authors: Tamjis Mohd Ridzwan , Mansor Muhammad Naufal , Junoh Ahmad Kadri , Ahmed Amran , Daud Wan Suhana Wan , Idris Azrini
Published: August 2014

Classroom speech intelligibility has become one of the main concerns in schools and other learning institutions development nowadays. This is because the qualities of student’s perceptions towards teacher are essentials in learning development. Measures have been introduced by the acoustical association to tackle the speech intelligibility problems in the classroom such as room renovations. Room’s acoustics standards have been introduced in several countries but still the questions on whether the standards fits on every classroom in different countries are still arise. Studies have also shown that most of the researches that have been conducted were only focusing on the conventional type classroom which depends only on the teacher’s vocal power. This paper will formulate the measurement protocol on measuring the speech intelligibility in the sound reinforced (multiple speaker) classroom. Finally it was found that the speech intelligibility in the sound reinforced classroom is better than the conventional classroom by using Linear Discriminant Analysis.
Influence of Power on the Microstructure and Optical Properties of Microcrystalline Si Films
Authors: Cheng Hua , Jiang Feng , Ma Chang Zheng , Jiang Kuo
Published: August 2014

Microcrystalline silicon films were deposited using Ar diluted SiH4 gaseous mixture by electron cyclotron resonance plasma-enhanced chemical vapor deposition (ECR-PECVD). The effects of power on microstrcture and optical properties of microcrystalline silicon films were investigated. The results show that, with the increasing of the power, the crystallinity increased, but the concentration of hydrogen decreased monotonously. Furthermore, the absorption coefficient of the films increased monotonously, and the optical bandgap changed from 1.89eV to 1.75eV with the microwave power ranging from 400 W to 650W.
Corrosion of Reinforcing Bars Astm A706 in Self-Compacting Concrete Subjected to Chloride Attack and Carbonation
Authors: Aperador William , Cortes Jairo , Carrillo J.
Published: August 2014

Self-compacting concrete is characterized as a system that has a mix design that increased strength and reduced amount of empty space within material. Reinforced concrete structures exposed to carbonation and chloride ion, are exposed to environmental conditions that cause degradation. Concrete were exposed to an accelerated carbonation test (3% CO2, 65% relative humidity, and 25 o C temperatures) and next it was tested under complete immersion, in 3.5 wt. % NaCl solution. . Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectroscopy were used to evaluate the corrosion behavior of steel bar.
Tribocorrosion Behavior of [Ticn/Tinbcn]n Coating on Austenitic Steels Substrate in Hanks' Balanced Salt Solution
Authors: Aperador William , Duque Jaime , Ruiz Erika
Published: August 2014

Multilayer coatings [ TiCN / TiNbCN ] n were fabricated with periods of bilayers 1, 50 and 200 deposited on substrates of austenitic steels type fermanal, using R.F. reactive magnetron sputtering with a radio frequency source (13.56 MHz) and two TiC and Nb targets. The multilayers were characterized using X-ray diffraction and scanning electron microscopy. The tribo – electrochemical behavior simulating hostile body environment was evaluated by testing tribocorrosion ( combination of wear and corrosion in aqueous environment ) which were carried out with a Gamry PCI 4 equipment to which adapted a pin on disk tribometer, the tests were made immersed in Hanks solution (Hanks balanced salt solution). A cell comprising a platinum counter-electrode, an Ag/AgCl reference electrode and the and a working electrode ( austenitic steels) at a temperature of 37 ± 0.2 ° C. the evaluation tests were performed using electrochemical techniques of Tafel polarization curves. Regarding the results, the hard coating [ TiCN / TiNbCN ] n improved polarization resistance and lower coefficient of friction than that reported for the substrate is provided , which indicates a good resistance to corrosion and wear.
The Role of Vanadium in Reduction of Helium Diffusion in Tungsten Based Alloys
Authors: Imran Shaban Bhatti , Arshad Kameel
Published: August 2014

Helium diffusion is a very critical factor for designing a plasma facing components of fusion reactor. Because it not only reduce the thermal conductivity but also degrade the surface morphology of tungsten based materials. In this numerical study the specimens of tungsten, vanadium and tungsten vanadium alloys have been simulated under thermo-diffusion conditions. The finite element commercial software Abaqus was used for simulation to obtain helium diffusion profile at temperature of 800 K for concentration of1024number of atoms in tungsten and vanadium metals. Due to its relatively low helium diffusion coefficient, vanadium has shown better resistance against helium penetration as compared to tungsten. Subsequently the analytical effect of helium diffusion in tungsten, vanadium and different grades of tungsten vanadium alloys has been investigated. To study the distribution of vanadium in tungsten, tungsten vanadium alloys were fabricated by spark plasma sintering technique and its morphology has been analyzed by scanning electron microscopy.
The Synthesis of the Robust Stabilization System of Cable Tension for the Test Bench of Weightlessness Simulation
Authors: Ezangina Tatiana Al. , Gayvoronskiy Sergey An.
Published: August 2014

The structure of the robust stabilization system of cable tension for the test bench of weightlessness simulation was developed. The algorithm of a parametric synthesis of the robust PI–controller based on the coefficient method and the criterion of maximum degree of stability was suggested. The operability of the synthesized robust system was confirmed by the results of digital simulation.
Improvement Design of the Insulation Structure of High Temperature Pneumatic Duct System of the Aircraft
Authors: Shi Hong , Jiang Yan Long , Peng Yin , Cai Yu Fei
Published: August 2014

Based on the study of the duct leak detection system of commercial aircraft in existence, the insulation structure of high temperature pneumatic duct system of the aircraft is improved with multilayer insulation method and its engineering calculation method is derived. Also, the insulation experiment platform of the high temperature pneumatic duct system is built to verify the applicability and feasibility of the engineering calculation method. The research result shows that the results from the engineering calculation method is not fit the experimental data perfectly, the margin of error is 17 percentage. The main reason is that the diversion tunnels has a little effect on the temperature distribution and in these cases parameter modification method should be adopted in the engineering calculation method. These works would be helpful for the design and optimization of the high temperature pneumatic duct system.
Analysis of Orbital Thermal Environment for Inclined-LEO Small Satellite
Authors: Liu Jia , Wang Chao Lun , Li Yun Ze
Published: August 2014

Spacecraft thermal design is a process of energy management in which environmental heating plays a major role. This paper is aimed at modeling and analysis of the orbital thermal environment by considering the external heat radiation, for the inclined-LEO cubed satellite with 3-axis stabilized (to Earth state).The result indicates that the analytical model simplifies the analysis of orbital thermal environment and the absolute value of angle on inclined orbit can vary from 0 to a maximum which equals to the sum of orbit inclination and the maximum declination of the sun. Finally, for the inclined-LEO small satellite, the extreme thermal case should fully take account of the point of.
State-Space Rotor Aeroelastic Modeling for Real-Time Helicopter Flight Simulation
Authors: Gori Riccardo , Pausilli Francesca , Pavel Marilena D. , Gennaretti Massimo
Published: August 2014

This paper introduces a new approach for the identification of linear state-space models of dynamical systems of arbitrary complexity. The identification procedure is described and applied for modeling aeroelastic response of helicopter main rotors. With the aim of developing a tool that might be conveniently applied for real-time simulations of helicopter flight dynamics, the state-space model considered is a reduced-order description of loads transmitted to the airframe due to hub motion and blade pitch controls. In order to validate the proposed approach, loads from the state-space, reduced-order model are compared with those predicted by the complete full-state, nonlinear rotor model for prescribed helicopter maneuvers.
Effect of Reduced Frequency on Longitudinal Oscillatory Derivatives of an Airfoil Based on Wind Tunnel Data
Authors: Marzabadi F. Rasi , Moghadam Ramin Kamali
Published: August 2014

Longitudinal dynamic derivatives of an airfoil oscillating in pitching and plunging motions were calculated using variation of pitching moment coefficients with angle of attack in various conditions, based on wind tunnel data. The effect of reduced frequency on variation of longitudinal oscillatory derivatives was investigated, in three different regions of oscillation: before, over and post stall conditions. The results showed that reduced frequency has significant effects on longitudinal oscillatory coefficients in different conditions for both types of oscillations.
Numerical Simulation of Powered High-Lift Flow
Authors: Gong Zhi Bin , Li Jie , Tian Bin
Published: August 2014

To achieve short-take-off-and-landing (STOL) performance, numerous airframe/propulsion integration (API) technologies have been developed for military and commercial transports. Powered lift technology refers to a concept of utilizing the propulsion exhaust flows to increase lift through an increase in wing circulation []. Over the past seventy years, various concepts have been explored to accomplish this goal. From the point of view of technical characteristics, powered lift concepts can be sorted into three groups: a circulation control wing, blown flaps, and jet wing. Most of other concepts are slight deviations of these three.
Aeroacoustics Investigation of an Automotive Exhaust Muffler
Authors: Borghi Fabrício Torres , Barros José Eduardo Mautone , Valle Ramon Molina
Published: August 2014

Traffic is a major source of environmental noise in modern society. Subsequently, the development of new vehicles is subjected to heavy governmental legislations. The major noise source on common road vehicles during acceleration is the flow noise caused by turbulent exhaust gas. The main goal of this work is to develop an appropriate Aeroacoustic simulation method to investigate the acoustic of sound on exhaust automotive muffler. The range of validity of the method is studied comparing results to experimental data. The Computational Aeroacoustics (CAA) results are compared with an experimental test in a vehicle during its acceleration and the mean flow model of the muffler has a satisfactory mesh with a suitable inlet boundary provided by an engine dynamometer data. The present work describes a good agreement between computational and experimental approach for the Aeroacoustics behavior of a specific configuration of exhaust muffler.
On the Unsteady Flow of Two Incompressible Immiscible Second Grade Fluids between Two Parallel Plates
Authors: Siddiqui Abdul M. , Mitkova Maya K. , Ansari Ali R.
Published: August 2014

Unsteady, pressure driven in the gap between two parallel plates flow of two non-Newtonian incompressible second grade fluids is considered. The governing equations are established for the particular two-layer flow and analytical solutions of the equations that satisfy the imposed boundary conditions are obtained. The velocity of each fluid is expressed as function of the material constants, time dependent pressure gradient and other characteristics of the fluids. As part of the solution, an expression for the interface velocity is derived. We analyze the shift of the velocity maximum from one to another fluid as a function of variety of values of fluids’ parameters.