Mechanical Engineering Commons^™

Mems Based Microneedle Actuator With Piezoresistive Force Feedback System For Biomedical Applications, Innovative Research Publications Irp India, Ashen Wijesiri, Y.W.R. Amarasinghe

Innovative Research Publications IRP India

This paper presents a novel design of MEMS based microneedle actuator with force feedback system which can be used for biomedical applications such as cell manipulation, drug delivery and DNA injection. The actuation mechanism of microneedle is driven by two electrostatic comb actuators. Since the manipulated objects are very sensitive, and can be easily damaged, it’s essential to have a force feedback system in the micro actuator to avoid unnecessary deformations. Piezoresistive sensing elements are used for the force feedback of the system. The proposed system was simulated using COMSOL Multiphysics software considering the anisotropic material properties and the nonlinear …

Influence Of Inner Surface Notch On Fatigue Crack Growth Characteristics Of Aluminum Alloy, Innovative Research Publications Irp India, Mahantesh. Matur, V. Krishnan, P. Dinesh

Innovative Research Publications IRP India

Effect of initial notch on the Fatigue crack growth of Aluminum 6061 specimen specified by ASTM is investigated. Growth rate obtained by experiment and numerical methods were compared. The values are in close agreement. The study shows the dependency of crack propagation on the stress intensity range of the Aluminum.

An Integrated Fuzzy Weighted Servqual - Qfd Approach For Service Quality Improvement, Innovative Research Publications Irp India, Aneesh M. R, Dileeplal Dileeplal J J., M. A. Abraham

Innovative Research Publications IRP India

Service quality is an essential aspect of any service provider. The role of service quality becomes critical in the success of any organization. Nowadays, with the increased competition, service quality has become a popular area of academic research. In order to measure and improve service quality, it is important to use a reliable instrument. In this paper, an integrated approach (Fuzzy Weighted SERVQUAL - QFD) is proposed to help the organization to measure service quality and guide to development of innovative service through identification of weak attribute which are critical to customers. The proposed methodology is documented with practical case …

Solar Energy Resource Assessment Of The Geba Catchment, Northern Ethiopia, Anwar Mahmud, Mulu Kahsay, Asfafaw Tesfay, Ftwi Hagos

Ftwi Yohaness Hagos

The global shift towards renewable energy is manifested in developing countries such as Ethiopia primarily because of continuous economic growth in the last two decades and secondly due to the vast untapped potential resources. In addition to other factors, the lack of accurate data of the resources has, however, hampered the development of solar energy technologies. The aim of this paper is to investigate the resource estimation by undertaking direct measurements at selected sites in the Northern part of Ethiopia. This paper presents an assessment of the solar energy resource based on the primary data collected between January 2011 and …

Big Data And The Precision Business Plan, David J. Muth

David J. Muth

Precision data is available, but current use isn't maximizing value for actionable decisions. AgSolver is delivering products that: make unlike information work together; extend the value of information with specific, high impact decisions; and find the intersection between compliance/certification and profitability.

Field Monitoring Of Rail Squats Using 3d Ultrasonic Mapping Technique, Sakdirat Kaewunruen, Makoto Ishida

Sakdirat Kaewunruen

Rail squats and studs are typically classified as the propagation of any cracks that have grown longitudinally through the subsurface. Some of the cracks could propagate to the bottom of rails transversely, which have branched from the initial longitudinal cracks with a depression of rail surface. The rail defects are commonly referred to as ‘squats’ when they were initiated from damage layer caused by rolling contact fatigue, and as ‘studs’ when they were associated with white etching layer caused by the transform from pearlitic steel due to friction heat generated by wheel sliding or excessive traction. Such above-mentioned rail defects …

Nonlinear Oscillations Analysis Of The Elevator Cable In A Drum Drive Elevator System, Hassan Askari

No abstract provided.

Nonlinear Vibration Analysis Of Nonlocal Nanowires, Hassan Askari

No abstract provided.

Crop Decision-Making To Protect Soil And Water, David J. Muth

David J. Muth

David Muth, a founding partner and senior vice president for analytics at AgSolver Inc., discusses crop decision making in the context of soil and water protection.

Surface Hardness Of Friction Stir Welded Aa6063 Pipe, Azman Ismail, Mokhtar Awang

AZMAN ISMAIL

The external surface hardness of friction stir welded aluminum alloy 6063 pipe joint was investigated in this paper. The 89mm of outside diameter pipe with 5mm of wall thickness was used as test pipe piece for this experiment on closed butt joint configuration by utilising Bridgeport 2216 CNC milling machine and orbital clamping unit specially designed to cater for this task and function. Several welded samples were produced on varying process parameters which were successfully joined by using a non-consumable tool with a flat shoulder and a cylindrical pin.

Surface Hardness Of Friction Stir Welded Aa6063 Pipe, Azman Ismail, Mokhtar Awang

Azman Ismail

The external surface hardness of friction stir welded aluminum alloy 6063 pipe joint was investigated in this paper. The 89mm of outside diameter pipe with 5mm of wall thickness was used as test pipe piece for this experiment on closed butt joint configuration by utilising Bridgeport 2216 CNC milling machine and orbital clamping unit specially designed to cater for this task and function. Several welded samples were produced on varying process parameters which were successfully joined by using a non-consumable tool with a flat shoulder and a cylindrical pin.

Effect Of Air-Fuel Ratio On The Combustion Characteristics Of Syngas (H2:Co) In Direct-Injection Spark-Ignition Engine, Ftwi Yohaness Hagos, A. Rahsid Abd Aziz, Shaharin A. Sulaiman

Ftwi Yohaness Hagos

This paper presents experimental results of the effect of air-fuel ratio on the combustion characteristics of a direct-injection spark-ignition engine fuelled with a syngas of H2/CO composition of equal molar ratio. The engine was operated at fully open throttle and the start of fuel injection (SOI) was set at 180obefore top dead center (BTDC). The spark advance was set to the minimum advance for a maximum brake torque. The experiment was conducted at lean mixture conditions with engine speed ranging from 1500 to 2400 rev/min. The results show that syngas operated under wider operation excess air ratio (λ) as compared …

Modeled Impacts Of Cover Crops And Vegetative Barriers On Corn Stover Availability And Soil Quality, Ian J. Bonner, David J. Muth Jr., Joshua B. Koch, Douglas L. Karlen

David J. Muth

Environmentally benign, economically viable, and socially acceptable agronomic strategies are needed to launch a sustainable lignocellulosic biofuel industry. Our objective was to demonstrate a landscape planning process that can ensure adequate supplies of corn (Zea mays L.) stover feedstock while protecting and improving soil quality. The Landscape Environmental Assessment Framework (LEAF) was used to develop land use strategies that were then scaled up for five U.S. Corn Belt states (Nebraska, Iowa, Illinois, Indiana, and Minnesota) to illustrate the impact that could be achieved. Our results show an annual sustainable stover supply of 194 million Mg without exceeding soil erosion T …

Mesure Du Coefficient D’Absorption De Matériaux Poreux Sous Champ Acoustique Diffus Synthétique, Olivier Robin, Alain Berry, Olivier Doutres Ph.D., Noureddine Atalla

Olivier Doutres Ph.D.

Cette communication décrit une méthode expérimentale pour l’estimation du coefficient d’absorption de matériaux absorbants sous un champ acoustique diffus synthétisé dans des conditions de champ libre. Des comparaisons sont réalisées entre des résultats expérimentaux obtenus via cette méthode et celle standardisée de la chambre réverbérante, ainsi qu’avec des simulations numériques basées sur la méthode des matrices de transfert. En utilisant des surfaces de matériaux inférieures à celles requises pour la méthode standardisée, les valeurs de coefficient d’absorption obtenues ne présentent pas les surestimations liées aux effets de taille de l’échantillon vues dans le cas de la mesure en chambre réverbérante. …

Critical Factors Affecting Success Of A Blast Furnace Project, Srinivasa Rao Potti Mr, Shiva H.C Prasad Dr., Gopalkrishan Barkur Dr.

SHIVA H.C PRASAD Mr.

The project management is a subsection of operational management that links to an economic activity. This emphasizes the process of making decisions and operationalising the strategies and tactics to reach the goal through owners, contractors, engineers and consultants within the planned constraints via meeting the schedule. Critical success factors are the bottom line for the successful completion while countering the factors of failure. This research study mainly focuses on relining of blast furnace as a project and so as to identify the critical success factors that influence the project success in a private steel manufacturing company in India.

Blast furnaces …

Free Vibrations Of Interspersed Railway Track Systems In Three-Dimensional Space, Sakdirat Kaewunruen, Alex M. Remennikov, Akira Aikawa, Hirotaka Sakai

Sakdirat Kaewunruen

Statistically, the actual loading conditions for railway tracks are rather dynamic and transient. The dynamic loadings due to train and track interactions redistribute from the rails to the rail pad, from the rail pad to the railway sleeper, and from the railway sleeper to the underlying ground. Commonly, railway sleeper in track systems is modeled as a beam on elastic foundation. This study makes use of a calibrated finite element model of railway sleepers in a track system, in order to investigate the resonant frequencies and associated mode shapes of railway components in interspersed track systems. The numerical model takes …

Dynamic Responses Of Railway Bridge Ends: A Systems Performance Improvement By Application Of Ballast Glue/Bond, Sakdirat Kaewunruen

Sakdirat Kaewunruen

Accelerated deterioration of railway bridge approaches often induces downtime or restricted railway operation; and importantly causes more frequent maintenance, which is costly and time-consuming. Such deterioration is believed to occur because of high dynamic impact loading from: the difference of stiffness between the railway track and the bridge; and the poor condition of the track support at the bridge ends. The abrupt change in track stiffness often causes accelerated degradation of the track geometry and components and poor ride quality, demanding higher maintenance. There are a number of improvement programs that have been implemented in order to provide a smooth …

Mechanical Design And Analysis Of A 1-U Cubesat, Ben Kading, Jeremy Straub, Ronald Marsh

Jeremy Straub

The OpenOrbiter Small Spacecraft De-velopment Initiative seeks to create a low-cost, easy-to-assemble CubeSat1 design that can be produced with a parts budget of under USD$5,0002. In [1], an initial design was presented; this design was enhanced in [3] and has been revised further. The current design, which has switched focus from defining specifications, requirements and constraints to identifying real parts which meet these previously defined constraints, is presented herein.

Experimental Investigation Of Worm Gears Performance, Part I: Contact Pattern And Worm Wheel Teeth, Alireza Nezamabadi, Ehsan Soury, Arash Houshmand

Arash Houshmand

This paper is focused on the performance of worm gears influenced by the position of the contact pattern. By decreasing in size of the contact pattern area the lubricant film thickness between worm and worm wheel teeth will be decreased and lubricant temperature as a criterion for worm gears performance will be increased. In this experiment by designed tests, the effect of Contact Pattern Position of the Worm Wheel Teeth on the Lubricant Temperature behavior had been investigated. By considering the performed studies on statistical results of the amount of percentage of contact area in every tooth of under experiment …

Monitoring In-Service Performance Of Fibre-Reinforced Foamed Urethane Sleepers/Bearers In Railway Urban Turnout Systems, Sakdirat Kaewunruen

Sakdirat Kaewunruen

Special track systems used to divert a train to other directions or other tracks are generally called \'railway turnout\'. A traditional turnout system consists of steel rails, switches, crossings, steel plates, fasteners, screw spikes, timber bearers, ballast and formation. The wheel rail contact over the crossing transfer zone has a dip-like shape and can often cause detrimental impact loads on the railway track and its components. The large impact also emits disturbing noises (either impact or ground-borne noise) to railway neighbors. In a brown-field railway track where an existing aged infrastructure requires renewal or maintenance, some physical constraints and construction …

Hvac Chapter 1, Dr Alireza Zolfaghari

Dr Alireza Zolfaghari

No abstract provided.

Design Of A Passive Exoskeleton Spine, Haohan Zhang

Haohan Zhang

In this thesis, a passive exoskeleton spine was designed and evaluated by a series of biomechanics simulations. The design objectives were to reduce the human operator’s back muscle efforts and the intervertebral reaction torques during a full range sagittal plane spine flexion/extension. The biomechanics simulations were performed using the OpenSim modeling environment. To manipulate the simulations, a full body musculoskeletal model was created based on the OpenSim gait2354 and “lumbar spine” models. To support flexion and extension of the torso a “push-pull” strategy was proposed by applying external pushing and pulling forces on different locations on the torso. The external …

Multi-Frequency Excitation Of Stiffened Triangular Plates For Large Amplitude Oscillations, Hassan Askari

No abstract provided.

Experimental Investigation Of A Multicylinder Unmodified Diesel Engine Performance, Emission, And Heat Loss Characteristics Using Different Biodiesel Blends: Rollout Of B10 In Malaysia, M.J Abedin, H.H Masjuki, M.A. Kalam, Mahendra Varman M. Varman, M.I. Arbab, I.M. Rizwanul Fattah, B.M. Masum

Mahendra Varman Munusamy (M. Varman)

This paper deals with the performance and emission analysis of a multicylinder diesel engine using biodiesel along with an in-depth analysis of the engine heat losses in different subsystems followed by the energy balance of all the energy flows from the engine. Energy balance analysis allows the designer to appraise the internal energy variations of a thermodynamic system as a function of ‘‘energy flows’’ across the control volume as work or heat and also the enthalpies associated with the energy flows which are passing through these boundaries. Palm and coconut are the two most potential biodiesel feed stocks in this …

Modelling Of Radiative Heat Transfer In A Cfb Furnace By Correlation Based Zone Method, Kari Myöhänen, Mohammad Hadi Bordbar

Kari Myöhänen

No abstract provided.

Trends Of Syngas As A Fuel In Internal Combustion Engines, Ftwi Yohaness Hagos, A. Rahsid Abd Aziz, Shaharin A. Sulaiman

Ftwi Yohaness Hagos

Syngas from biomass and solid waste is a carbon-neutral fuel believed to be a promising fuel for future engines. It was widely used for spark-ignition engines in the WWII era before being replaced with gasoline. In this paper, the technological development, success, and challenges for application of syngas in power generating plants, the trends of engine technologies, and the potential of this fuel in the current engine technology are highlighted. Products of gasification vary with the variation of input parameters. Therefore, three different syngases selected from the two major gasification product categories are used as case studies. Their fuel properties …

Current Trends In Water-In-Diesel Emulsion As A Fuel, Mohammed Yahaya Khan, Zainal Ambri Abdul Karim, Ftwi Yohaness Hagos, Isa Mohd Tan, A. Rashid Abd Aziz

Ftwi Yohaness Hagos

Water-in-diesel emulsion (WiDE) is an alternative fuel for CI engines that can be employed with the existing engine setup with no additional engine retrofitting. It has benefits of simultaneous reduction of both NO x and particulate matters in addition to its impact in the combustion efficiency improvement, although this needs further investigation. This review paper addresses the type of emulsion, the microexplosion phenomenon, emulsion stability and physiochemical improvement, and effect of water content on the combustion and emissions of WiDE fuel. The review also covers the recent experimental methodologies used in the investigation of WiDE for both transport and stationary …

Opportunities For Energy Crop Production Based On Subfield Scale Distribution Of Profitability, Ian J. Bonner, Kara G. Cafferty, David J. Muth, Mark D. Tomer, David E. James, Sarah A. Porter, Douglas L. Karlen

David J. Muth

Incorporation of dedicated herbaceous energy crops into row crop landscapes is a promising means to supply an expanding biofuel industry while benefiting soil and water quality and increasing biodiversity. Despite these positive traits, energy crops remain largely unaccepted due to concerns over their practicality and cost of implementation. This paper presents a case study for Hardin County, Iowa, to demonstrate how subfield decision making can be used to target candidate areas for conversion to energy crop production. Estimates of variability in row crop production at a subfield level are used to model the economic performance of corn (Zea mays L.) …

Termodynamika Procesowa I Techniczna Lab., Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.

Tematyka Prac Dyplomowych Dla Studentów Wydziału Mechaniczno-Energetycznego Pwr., Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.