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Articles 1 - 30 of 49
Full-Text Articles in Engineering
کارگاه اصول نگارش مقالات علمی 1, Dr Alireza Zolfaghari
کارگاه اصول نگارش مقالات علمی 1, Dr Alireza Zolfaghari
Dr Alireza Zolfaghari
No abstract provided.
My Lecture Notes (Heat Transfer 1) - (Chapter8), Dr Alireza Zolfaghari
My Lecture Notes (Heat Transfer 1) - (Chapter8), Dr Alireza Zolfaghari
Dr Alireza Zolfaghari
No abstract provided.
My Lecture Notes (Heat Transfer 1) - (Chapter 7), Dr Alireza Zolfaghari
My Lecture Notes (Heat Transfer 1) - (Chapter 7), Dr Alireza Zolfaghari
Dr Alireza Zolfaghari
No abstract provided.
On The Residual Energy Toughness Of Prestressed Concrete Sleepers In Railway Track Structures Subjected To Repeated Impact Loads, Sakdirat Kaewunruen, Alex M. Remennikov
On The Residual Energy Toughness Of Prestressed Concrete Sleepers In Railway Track Structures Subjected To Repeated Impact Loads, Sakdirat Kaewunruen, Alex M. Remennikov
Sakdirat Kaewunruen
Installed as the crosstie beam support in railway track systems, the prestressed concrete sleepers (or railroad ties) are designed in order to carry and transfer the wheel loads from the rails to the ground. It is nowadays best known that railway tracks are subject to the impact loading conditions, which are attributable to the train operations with either wheel or rail abnormalities such as flat wheels, dipped rails, etc. These loads are of very high magnitude but short duration, as well as there exists the potential of repeated load experience during the design life of the prestressed concrete sleepers. These …
مشخصات کلی برنامه و سرفصل دروس دوره کارشناسی مهندسی مکانیک, Dr Alireza Zolfaghari
مشخصات کلی برنامه و سرفصل دروس دوره کارشناسی مهندسی مکانیک, Dr Alireza Zolfaghari
Dr Alireza Zolfaghari
No abstract provided.
سرفصل دروس دوره کارشناسی مهندسی مکانیک (گروه مهندسی مکنیک دانشگاه اصفهان), Dr Alireza Zolfaghari
سرفصل دروس دوره کارشناسی مهندسی مکانیک (گروه مهندسی مکنیک دانشگاه اصفهان), Dr Alireza Zolfaghari
Dr Alireza Zolfaghari
No abstract provided.
Orthogonal Decomposition As A Design Tool: With Application To A Mixing Impeller, Benjamin M. Sloan
Orthogonal Decomposition As A Design Tool: With Application To A Mixing Impeller, Benjamin M. Sloan
Benjamin M. Sloan
No abstract provided.
Railway Bridge-Track Interaction Under Elevated Temperatures, Sakdirat Kaewunruen
Railway Bridge-Track Interaction Under Elevated Temperatures, Sakdirat Kaewunruen
Sakdirat Kaewunruen
This paper presents the adaptability to short-term climate variability and extreme events of existing infrastructures in Australia, especially railway track bridges. The main objective of this research was to analyse the interaction between the track and bridge under elevated temperatures. The scope of work was to evaluate the behaviour of the track and bridge interaction throughout temperature ranges experienced in summer periods whereas the expansion and contraction of materials are different in nature. This investigation was emphasised on the differential longitudinal behaviours of railway track and bridge structure. A nonlinear 3D finite element model of a railway bridge (ballast top) …
Acoustic And Dynamic Characteristics Of A Complex Urban Turnout Using Fibre-Reinforced Foamed Urethane (Ffu) Bearers, Sakdirat Kaewunruen
Acoustic And Dynamic Characteristics Of A Complex Urban Turnout Using Fibre-Reinforced Foamed Urethane (Ffu) Bearers, Sakdirat Kaewunruen
Sakdirat Kaewunruen
A special track system used to divert a train to other directions or other tracks is generally called ‘railway turnout’. A traditional turnout system includes rails, switches, crossings (special track components), 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 …
Motion And Force Transmission Of A Flexible Instrument Inside A Curved Endoscope, Jitendra P. Khatait
Motion And Force Transmission Of A Flexible Instrument Inside A Curved Endoscope, Jitendra P. Khatait
Jitendra P Khatait
Flexible instruments are increasingly used to perform advanced and complex surgical procedures either manually or robotically. The success of flexible instruments in surgery requires high motion and force fidelity, and controllability of the tip. However, the friction and the limited stiffness of such instruments limit their motion and force transmission. The implementation of flexible instruments in surgery necessitates their characterization, the development of proper tools to understand the effect of various mechanical parameters on their overall performance, and an improvement in motion and force fidelity. Therefore, this thesis describes 2-D and 3-D flexible multibody models of a flexible surgical instrument …
3d Modelling Of Oxygen Fired Cfb Combustors In Different Scales, Jarno Parkkinen, Pasi Antikainen, Manuel Gómez, Kari Myöhänen, Timo Hyppänen
3d Modelling Of Oxygen Fired Cfb Combustors In Different Scales, Jarno Parkkinen, Pasi Antikainen, Manuel Gómez, Kari Myöhänen, Timo Hyppänen
Kari Myöhänen
No abstract provided.
Corrosion Of Magnesium And Aluminum In Palm Biodiesel: A Comparative Evaluation
Corrosion Of Magnesium And Aluminum In Palm Biodiesel: A Comparative Evaluation
A.S. Md Abdul Haseeb
The present study aims to investigate the comparative corrosion of light-weight metals such as aluminum and magnesium in palm biodiesel. Immersion test at room temperature was carried out for each metal for 1440 h. Sample characterization techniques employed include weight loss measurement, SEM (scanning electron microscope), XRD (X-ray diffraction), TAN (total acid number) and FTIR (Fourier transform infrared spectroscopy). Results showed that the corrosion rate of magnesium was much higher compared to that of aluminum. The surface morphology revealed a significant difference between the biodiesel exposed aluminum and magnesium specimens. Upon exposure to biodiesel, the magnesium surface was found to …
Friction Stir Welding On Aluminum Alloy 6063 Pipe, Azman Ismail, Mokhtar Awang, Hasan Fawad, Kamal Ahmad
Friction Stir Welding On Aluminum Alloy 6063 Pipe, Azman Ismail, Mokhtar Awang, Hasan Fawad, Kamal Ahmad
Azman Ismail
For Friction Stir Welding (FSW) process, a substantial amount of research done on aluminium plate but very few are found for aluminium pipe due to its tubular shape. A specially customised Orbital Clamping Unit (OCU) was used and fixed on the Bridgeport 2216 CNC milling machine in order to run the FSW on aluminium alloy 6063 pipe butt joint at several welding parameters. This OCU will hold these pipes together tightly, rotate these pipes at the required constant low speed, and ensure easy removal of pipe after the welding process before proceeding for further testing. This paper will study the …
How To Transition Patent Drawings Into Persuasive Courtroom Exhibits, Bernadette Marshall
How To Transition Patent Drawings Into Persuasive Courtroom Exhibits, Bernadette Marshall
Bernadette Marshall
We want you to get the most out of your patent drawings. In this edition we will discuss the role of patent drawings in litigation and how they can be used to create or enhance persuasive litigation graphics. Whether you are pursuing an infringer or defending your patent, drawings can help educate a judge or jury. Simple, clear and accurate images can often help you win the day. Whether deciding on what damages are appropriate or if in settlement negotiations, a well-defined patent enables the owner to negotiate for the best result possible.
31 - تحليل تاثيرات استفاده از عايقهاي تغيير فاز دهنده بر ميزان کاهش مصرف سالانه انرژي ساختمان در اقليم هاي مختلف ايران, Alireza Zolfaghari, Mehran Sa'adati-Nasab, Mohamad Rahimpour, Hamed Moslehi, Mohamad Solhi
31 - تحليل تاثيرات استفاده از عايقهاي تغيير فاز دهنده بر ميزان کاهش مصرف سالانه انرژي ساختمان در اقليم هاي مختلف ايران, Alireza Zolfaghari, Mehran Sa'adati-Nasab, Mohamad Rahimpour, Hamed Moslehi, Mohamad Solhi
Dr Alireza Zolfaghari
No abstract provided.
30 - تحليل ميزان تاثيرگذاري جنس پوسته خارجي ساختمان بر عملکرد سيستم گرمايش قرنيزي در اقليم تهران, Bahman Sekhavatmand, Alireza Zolfaghari, Mohamad Rahimpour, Hamed Moslehi, Mehran Sa'adati-Nasab
30 - تحليل ميزان تاثيرگذاري جنس پوسته خارجي ساختمان بر عملکرد سيستم گرمايش قرنيزي در اقليم تهران, Bahman Sekhavatmand, Alireza Zolfaghari, Mohamad Rahimpour, Hamed Moslehi, Mehran Sa'adati-Nasab
Dr Alireza Zolfaghari
No abstract provided.
29 - تأثير بکارگيري مواد تغيير فازدهنده در پوسته خارجي ساختمان بر ايجاد شرايط آسايش حرارتي ساکنان بدون نياز به سيستم گرمايش/سرمايش, Mohamad Solhi, Alireza Zolfaghari, Mohamad Fathian, Hamed Moslehi, Mohamad Rahim-Pour, Mehran Sa'adati-Nasab
29 - تأثير بکارگيري مواد تغيير فازدهنده در پوسته خارجي ساختمان بر ايجاد شرايط آسايش حرارتي ساکنان بدون نياز به سيستم گرمايش/سرمايش, Mohamad Solhi, Alireza Zolfaghari, Mohamad Fathian, Hamed Moslehi, Mohamad Rahim-Pour, Mehran Sa'adati-Nasab
Dr Alireza Zolfaghari
No abstract provided.
International Harmonization Of Substantive Patent Law - What Does It Mean For Patent Drawings?, Bernadette Marshall
International Harmonization Of Substantive Patent Law - What Does It Mean For Patent Drawings?, Bernadette Marshall
Bernadette Marshall
Among others, the United States Patent & Trademark Office (USPTO) is moving towards harmonizing patent standards. Many rules for patent drawings have already been revised to correspond with those of the European Patent Office (EPO) and the World Intellectual Property Organization (WIPO). The rule change to make computer generated drawings permissible, provided they are executed in a manner that permits clear reproduction and copying, we feel makes perfect sense.
Numerical Modeling Of Gas-Solids Flow In Large Scale Circulating Fluidized Bed Using Subgrid-Scale Model (Poster), Srujal Shah, Kari Myöhänen, Marcin Klajny, Timo Hyppänen
Numerical Modeling Of Gas-Solids Flow In Large Scale Circulating Fluidized Bed Using Subgrid-Scale Model (Poster), Srujal Shah, Kari Myöhänen, Marcin Klajny, Timo Hyppänen
Kari Myöhänen
No abstract provided.
Work To-Date On Mechanical Design For An Open Hardware Spacecraft, Jacob Brewer, Brian Badders, Josh Berk, Jeremy Straub
Work To-Date On Mechanical Design For An Open Hardware Spacecraft, Jacob Brewer, Brian Badders, Josh Berk, Jeremy Straub
Jeremy Straub
The OpenOrbiter CubeSat seeks to demonstrate the designs created for the Open Prototype for Educational NanoSats (OPEN) initiative. OPEN provides a set of freely available design documents that can be utilized by educational and research teams worldwide. The OPEN structure implements a different strategy than most other CubeSats, allowing it to maximize the use of the overhang space (an area of space between the supports for the frame rails and the wall in the PPOD deployer). It also provides a location for payload components or a propellant tank at the spacecraft’s center of mass. This design is enabled by a …
How Much Should You Pay For Patent Drawings?, Bernadette Marshall
How Much Should You Pay For Patent Drawings?, Bernadette Marshall
Bernadette Marshall
How much should you pay for patent drawings? There is no set rate or price for patent drawings because prices are set by the market. Prices vary with the complexity and timing of drawings and reference materials supplied. The highest price is no guarantee of the best quality. Those in the market for patent drawings are wise to shop for the best quality at a competitive price.
Application Of Higher Order Hamiltonian Approach To Nonlinear Vibrating Systems, Hassan Askari
Application Of Higher Order Hamiltonian Approach To Nonlinear Vibrating Systems, Hassan Askari
Hassan Askari
No abstract provided.
Investigation Of Friction And Wear Characteristics Of Palm Biodiesel
Investigation Of Friction And Wear Characteristics Of Palm Biodiesel
A.S. Md Abdul Haseeb
Use of biodiesel in automobile engine is creating tribology related new challenges. The present study aims to assess the friction and wear characteristics of palm biodiesel at different concentration level by using four-ball wear machine. The investigated fuels were biodiesel (B100), diesel (B0) and three different biodiesel blends such as B10 (10% biodiesel in diesel), B20, B50. Tests were conducted at 75 °C under a normal load of 40 kg for 1 h at four different speeds viz, 600, 900, 1200 and 1500 rpm. Worn surfaces of the balls were examined by SEM. Results showed that wear and friction decreased …
Early Flame Development Image Comparison Of Low Calorific Value Syngas And Cng In Di Si Gas Engine, Ftwi Yohaness Hagos, A. Rahsid Abd Aziz, Shaharin A. Sulaiman
Early Flame Development Image Comparison Of Low Calorific Value Syngas And Cng In Di Si Gas Engine, Ftwi Yohaness Hagos, A. Rahsid Abd Aziz, Shaharin A. Sulaiman
Ftwi Yohaness Hagos
The early flame development stage of syngas and CNG are analysed and compared from the flame images taken over 20o CA from the start of ignition. An imitated syngas with a composition of 19.2% H2, 29.6% CO, 5.3% CH4 and balance with nitrogen and carbon dioxide, which resembles the typical product of wood biomass gasification, was used in the study. A CCD camera triggered externally through the signals from the camshaft and crank angle sensors was used in capturing of the images. The engine was accessed through an endoscope access and a self-illumination inside the chamber. The results of the …
28 - تاثیر دمای ذوب مواد تغییر فاز دهنده بکار رفته در ديوار خارجي بر ميزان مصرف انرژي سالانه ساختمان, Mohamad Solhi, Alireza Zolfaghari, Mohamad Fathian, Mehran Sa'adati-Nasab, Hamed Moslehi, Mohamad Rahimpour
28 - تاثیر دمای ذوب مواد تغییر فاز دهنده بکار رفته در ديوار خارجي بر ميزان مصرف انرژي سالانه ساختمان, Mohamad Solhi, Alireza Zolfaghari, Mohamad Fathian, Mehran Sa'adati-Nasab, Hamed Moslehi, Mohamad Rahimpour
Dr Alireza Zolfaghari
No abstract provided.
27 - مدلسازي عملکرد سيستم گرمايش قرنيزي در يک ساختمان نمونه با جدار نورگذر جنوبي در اقليم تهران, Mohamad Rahimpour, Alireza Zolfaghari, Mehran Sa'adati-Nasab, Hamed Moslehi
27 - مدلسازي عملکرد سيستم گرمايش قرنيزي در يک ساختمان نمونه با جدار نورگذر جنوبي در اقليم تهران, Mohamad Rahimpour, Alireza Zolfaghari, Mehran Sa'adati-Nasab, Hamed Moslehi
Dr Alireza Zolfaghari
No abstract provided.
Why Patent Drawings Get Rejected Part1, Bernadette Marshall
Why Patent Drawings Get Rejected Part1, Bernadette Marshall
Bernadette Marshall
You may have had the misfortune to receive a drawing rejection or objection from the United States Patent and Trademark Office (USPTO), or a Patent Cooperation Treaty (PCT) rejection or other patent office rejection notice. Hopefully this will come with an invitation to correct defects in the application. Patent drawings can be part of or the entire reason for such a notice. Fortunately, many problems regarding patent drawings can be remedied. If drawings have been prepared and submitted without regard to the specific patent drawing rules, you stand a good chance that those drawings will be rejected. When this occurs, …
Corrosion Mechanism Of Copper In Palm Biodiesel
Corrosion Mechanism Of Copper In Palm Biodiesel
A.S. Md Abdul Haseeb
Biodiesel is a promising alternative fuel. However, it causes enhanced corrosion of automotive materials, especially of copper based components. In the present study, corrosion mechanism of copper was investigated by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Compositional change of biodiesel due to the exposure of copper was also investigated. Corrosion patina on copper is found to be composed of Cu2O, CuO, Cu(OH)2 and CuCO3. Dissolved O2, H2O, CO2 and RCOO- radical in biodiesel seem to be the leading factors in enhancing the corrosiveness of biodiesel. © 2012 Elsevier Ltd.
Influence Of Ni Nanoparticle On The Morphology And Growth Of Interfacial Intermetallic Compounds Between Sn-3.8ag-0.7cu Lead-Free Solder And Copper Substrate
A.S. Md Abdul Haseeb
This paper reports on the effects of adding Ni nanoparticles to a Sn-3.8Ag-0.7Cu solder. The nanocomposite was prepared by manual blending of SAC solder paste with various percentages of Ni particles. Results showed that the addition of Ni nanoparticles did not bring any significant change in the onset melting temperature of the solder. An increase in the weight percentage of nanoparticles in the solder caused an increase of the wetting angle and a decrease of spreading rate. Moreover, the addition of Ni nanoparticles changed the interfacial intermetallic compound morphology from a scalloped structure into a planar type structure, enhanced the …
Stability Of Molybdenum Nanoparticles In Sn-3.8ag-0.7cu Solder During Multiple Reflow And Their Influence On Interfacial Intermetallic Compounds, Haseeb Asma
Haseeb ASMA
This work investigates the effects of molybdenum nanoparticles on the growth of interfacial intermetallic compound between Sn-3.8Ag-0.7Cu solder and copper substrate during multiple reflow. Molybdenum nanoparticles were mixed with Sn-3.8Ag-0.7Cu solder paste by manual mixing. Solder samples were reflowed on a copper substrate in a 250 degrees C reflow oven up to six times. The molybdenum content of the bulk solder was determined by inductive coupled plasma-optical emission spectrometry. It is found that upon the addition of molybdenum nanoparticles to Sn-3.8Ag-0.7Cu solder, the interfacial intermetallic compound thickness and scallop diameter decreases under all reflow conditions. Molybdenum nanoparticles do not appear …