Digital Commons Network^™

Printed Dot Quality In Response To Doctor Blade Angle In Gravure Printing, Bilge N. Altay, Alexandra Pekarovicova, Paul D. Fleming

The Hilltop Review

Doctor blade is one of the critical machine part of the gravure printing press that controls the amount of ink transfer on the substrate. The angle of the blade can be varied; however, an improper angle may cause major problems. In this study, the doctor blade angle was positioned at three different level to address its effect on the printed dot quality. Print trials were made on a web-fed gravure press at the speed of 650 ft./min. A high-resolution overhead camera was used to analyze the key dot attributes. The results showed that measuring only the density of printed dot …

Acetone Production, Ali Ibrahim Neamah

The Hilltop Review

Iraq struggles with a lack of acetone production. This overall deficiency impacts the economy of countries like Iraq. Inasmuch, acetone is a vital chemical component for many items imported into this country such as nail polish remover. Therefore, a process of acetone production is proposed in this study.

The ideal process of producing acetone with 90.0% isopropyl alcohol (IPA) decomposition method is proposed within this study. The feed of the process is 100000 ton/ day. This amount of feed is suggested due to the demographic need of acetone for the Iraqi population as well as the surrounding Middle Eastern region. …

Balancing Of Production Line In A Bearing Industry To Improve Productivity, Sudharsan Sridhar, Balthilak Anandaraj, Santhosh B

The Hilltop Review

Line balancing addresses the issues of balancing production or assembly line and it generally minimizes the idle time for all the events and the combinations of workstations. Factors such as lack of materials, design changes in the product, labor position may also be needed for line balancing. We approached the industry and proposed a heuristic solution solving in two different platforms, by rearranging the existing tasks over the work stations, so that the idle time of the machines are reduced to minimum and the other is by using Timer Pro software where grouping of similar kind of activities are to …

Quality Improvement In Drilling Silicon By Using Micro Laser Assisted Drilling, Barkin Bakir

The Hilltop Review

The micro-laser assisted drilling (µ-LAD) of monocrystalline silicon (100), using a diamond cutting tool coupled with a laser, was tested in order to improve the cutting edge quality of a drilled samples. The laser beam is transmitted through an optically transparent diamond drill bit and focused precisely at the tool-workpiece interface, where the material is under high pressure induced by the diamond tool. The influence of the laser power on the quality and the inner surface finish of the drilled materials is investigated. Different laser powers were used to carry out the experiments. The experimental results indicated that the µ-LAD …

Potable Water Production From Third River In Nasiriyah City, Ahmed Faiq Al-Alawy, Jaafar Jabbar Madlool, Ali Ibrahim Neamah

The Hilltop Review

The present work aims to study the efficiency of coagulation/ flocculation as pretreatment then using membrane technology, microfiltration (MF) and Reverse Osmosis (RO), for treatment of water of Third River in Nasiriyah city in Iraq. Effects of operating parameters such as coagulant dosage, speed and time of slow mixing step and settling time in the pretreatment stage were studied. Also feed turbidity and TSS in the MF stage were studied. Also feed concentration, temperature and operating time, in the RO stage were studied. The results showed that the optimum dosage for alum was 40, 45 and 50 ppm. While, for …

Separation Of The Petroleum System, Ali Ibrahim Neamah

The Hilltop Review

This study discusses the overall process of crude oil separation as well as the necessary equipment used in the process. Also discussed and analyzed are potential issues seen in the crude oil extraction process. Reasons why these operation problems may occur are analyzed as well as treatment options for such occurring issues are discussed for employees and students alike. This research is based off of personal involvement at the Nasiriyah Degassing Station located in Dhi Qar, Iraq.

Advantages Of A Finite Extensible Nonlinear Elastic Potential In Lattice Boltzmann Simulations, Tai-Hsien Wu, Dewei Qi

The Hilltop Review

A new structure, generalized lattice nonlinear spring model (GLNSM), which adopts non-linear FENE-LJ potential instead of harmonic potential, has been coupled with lattice Boltzmann simulation for solving fluid-solid interaction problem. In this article, a significant work is the relationship between the GLNSM (FENE-LJ potential) and Young’s modulus has been described in detail. A validation has also been presented to prove that GLNSM is reliable.

The Art And Beauty Of Flight, Edmond Ing Huang Tan

The Hilltop Review

This picture nicely represents the art and gracefulness of flight with the beauty of sunset in a tranquil setting. In the picture is a powered paragliding, also known as paramotoring in the plains of Nebraska. The ability to fly both low and slow safely, the 'open' feel, the minimal equipment and maintenance costs, the portability, minimally regulated and requires no license are claimed to be this type of flying's greatest merits. Paramotors can be flown during any season of the year anywhere but not in high wind conditions which typically means at low Sun azimuths as shown in the picture …

Wmu Sunseeker Solarcar, Edmond Ing Huang Tan

The Hilltop Review

This picture was taken, at the racetrack the evening before the start of the North American Solar Challenge 2008 race in Plano, Texas. In this picture is the Sunseeker, Western Michigan University’s solar powered car that will race in the 2 week long, 2400miles long race from Plano, Texas to Calgary, Canada. Sunseeker was the only car in that race that feature a 2 electric motor drive system than the standard one electric motor drive system. Western Michigan University Sunseeker team brought back the sportsmanship award that year.

Microgas Turbine Engine Characteristics Using Biofuel, Edmond Ing Huang Tan, William W. Liou

The Hilltop Review

Aviation fuels commonly used today are extracted from the kerosene fraction of the crude oil that is distilled between the gasoline and the diesel. Crude oil is not renewable and the world oil reserve is generally believed to be on the decline. In 2006, 6.3% of the world's refinery production was used for aviation fuel (Nygren et. al., 2009). At an estimated rate of 3% increase of fuel demand per year, aviation use alone will consume the world fuel production by 2026. Therefore, there is a need for the aviation industry to reduce its dependence on fossil fuels and, perhaps, …

Comparison Of Computational And Experimental Aerodynamics: Results For A Wmu Solar Car Model, Yang Yang, William W. Liou

The Hilltop Review

Three-dimensional numerical simulations using FLUENT [1] were performed to model the airflow over the Sunseeker, an award-winning solar car that was designed and built at Western Michigan University. Converged numerical solutions on three different grids are reported and compared with the available experimental data, which include the lift and the drag coefficients. Also reported are the results obtained by using the second-order upwinding discretization on one of the grids. The comparison shows that the computed lift coefficients agree well with the experimental data for all the three grids and the different orders of numerical methods, indicating that the pressure field …

Evaluation Of Dye And Pigment Based Ink Jet Ink Sets, Veronika Chovancova

The Hilltop Review

The development of high performance inkjet printers and inks is advancing rapidly. Manufacturers seem to introduce their new technology inks to the market on an almost daily basis. Chemists in ink laboratories are still fighting with the issue of combining a wide gamut of dye-based inks with the lightfast and weather resistance qualities of pigment-based inks into new-age ink formulations.

Three different inkjet printers and inks were investigated in this work: the Epson Stylus® Pro 5000, using a dye-based ink set, the Epson Stylus® Pro 5500, employing Archival ink technology, and the Epson Stylus® Photo 2200, with 7-color UltraChrome™ inks. …

Adaptive Control In Swarm Robotic Systems, Hanyi Dai

The Hilltop Review

Inspired by the collective behavior observed in natural insects, swarm robotics is a new approach in designing control algorithms for a large group of robots performing a certain task. In such robotic systems, an individual robot with only limited capabilities in terms of sensing, computation, and communication can adapt its own behavior so that a desired collective behavior emerges from the local interactions among robots and between robots and the environment. Swarm robotics has been the focus of increased attention recently because of the beneficial features demonstrated in such systems, such as higher group efficiency, robustness against the failures of …

The Study Of Ink Pigment Dispersion Parameters, Lokendra Pal, Paul D. Fleming Iii

The Hilltop Review

The purpose of this study was to investigate the influence of rotation speed and milling time on the pigment dispersion quality. The information can be used to obtain a standard laboratory condition at which a wide range of pigments may be dispersed to formulate water-based rotogravure inks. The influence of pigment concentration and shear forces on the pigment dispersion were also studied.

The procedure consisted of dispersing the pigment using a laboratory Dispermat® SL bead mill at various milling times with two different rotation speeds and measuring the particle size and particle size distribution of the milled samples. The pigment …