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20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016

作者： Özbey, Arzu Karimzadehkhouei, Mehrdad Akgönül, Sarp Gözüaçik, Devrim Koşar, Ali Faculty of Engineering and Natural Science Mechatronics Engineering Program Sabanci University Istanbul Turkey Faculty of Engineering and Natural Science Biological Sciences and Bioengineering Program Sabanci University Istanbul Turkey

ISBN: (纸本)9780979806490

A variety of fundamental focusing and separation approaches has been studied with synthetic microparticles in the framework of microsystems. Among these techniques, inertial focusing has gained significant attention since it offers high throughput as well as effective and precise control for particle and cell manipulation. The effect of curvilinearity with a high curvature angle (280o) on particle focusing behavior is examined in this study by performing inertial focusing of fluorescent polystyrene microparticles of sizes of 10, 15 and 20 μm at different channel Reynolds numbers. Furthermore, the decoupling effect of inertial and dean drag forces on particles is revealed.

关键词： Microfluidics

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Design of an automatic production monitoring system on job shop manufacturing

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AIP Conference Proceedings 2018年第1期1931卷

作者： Hoedi Prasetyo Yohanes Sugiarto Cucuk Nur Rosyidi 1Master Study Program of Industrial Engineering Faculty of Engineering Universitas Sebelas Maret Surakarta 57126 Indonesia 2Mechatronics Department Politeknik ATMI Surakarta Surakarta 57145 Indonesia

Every production process requires monitoring system, so the desired efficiency and productivity can be monitored at any time. This system is also needed in the job shop type of manufacturing which is mainly influenced by the manufacturing lead time. Processing time is one of the factors that affect the manufacturing lead time. In a conventional company, the recording of processing time is done manually by the operator on a sheet of paper. This method is prone to errors. This paper aims to overcome this problem by creating a system which is able to record and monitor the processing time automatically. The solution is realized by utilizing electric current sensor, barcode, RFID, wireless network and windows-based application. An automatic monitoring device is attached to the production machine. It is equipped with a touch screen-LCD so that the operator can use it easily. Operator identity is recorded through RFID which is embedded in his ID card. The workpiece data are collected from the database by scanning the barcode listed on its monitoring sheet. A sensor is mounted on the machine to measure the actual machining time. The system’s outputs are actual processing time and machine’s capacity information. This system is connected wirelessly to a workshop planning application belongs to the firm. Test results indicated that all functions of the system can run properly. This system successfully enables supervisors, PPIC or higher level management staffs to monitor the processing time quickly with a better accuracy.

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Review on Lithotripsy and Cavitation in Urinary Stone Therapy

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IEEE Reviews in Biomedical engineering 2016年 9卷 264-283页

作者： Ghorbani, Morteza Oral, Ozlem Ekici, Sinan Gozuacik, Devrim Kosar, Ali Mechatronics Engineering Program Faculty of Engineering and Natural Science Sabanci University Istanbul Turkey Molecular Biology Genetics and Bioengineering Program Sabanci University Nanotechnology Research and Application Center Istanbul Turkey Department of Urology Hisar Intercontinental Hospital Istanbul Turkey Molecular Biology Genetics and Bioengineering Program Faculty of Engineering and Natural Sciences Sabanci University Istanbul Turkey

Cavitation is the sudden formation of vapor bubbles or voids in liquid media and occurs after rapid changes in pressure as a consequence of mechanical forces. It is mostly an undesirable phenomenon. Although the elimination of cavitation is a major topic in the study of fluid dynamics, its destructive nature could be exploited for therapeutic applications. Ultrasonic and hydrodynamic sources are two main origins for generating cavitation. The purpose of this review is to give the reader a general idea about the formation of cavitation phenomenon and existing biomedical applications of ultrasonic and hydrodynamic cavitation. Because of the high number of the studies on ultrasound cavitation in the literature, the main focus of this review is placed on the lithotripsy techniques, which have been widely used for the treatment of urinary stones. Accordingly, cavitation phenomenon and its basic concepts are presented in Section II. The significance of the ultrasound cavitation in the urinary stone treatment is discussed in Section III in detail and hydrodynamic cavitation as an important alternative for the ultrasound cavitation is included in Section IV. Finally, side effects of using both ultrasound and hydrodynamic cavitation in biomedical applications are presented in Section V. © 2008-2011 IEEE.

关键词： Hydrodynamics

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Effect of injection angle,density ratio,and viscosity on droplet formation in a microfluidic T-junction

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Theoretical & Applied Mechanics Letters 2017年第4期7卷 243-251页

作者： Mohammad Yaghoub Abdollahzadeh Jamalabadi Mohammadreza Daqiq Shirazi Ali Kosar Mostafa Safdari Shadloo Department of Mechanical Robotics and Energy Engineering Dongguk University Seou104620 Republic of Korea School of Mechanical Engineering College of Engineering University of Tehran Tehran Iran Mechatronics Engineering Program Faculty of Engineering and Natural Sciences Sabanci University Tuzla Istanbu134956 Turkey CORIA-UMR 6614 Normandie University CNRS-University and INSA of Rouen 76000 Rouen France

The T-junction microchannel device makes available a sharp edge to form micro-droplets from biomaterial solutions. This article investigates the effects of injection angle, flow rate ratio, density ratio,viscosity ratio, contact angle, and slip length in the process of formation of uniform droplets in microfluidic T-junctions. The governing equations were solved by the commercial software. The results show that contact angle, slip length, and injection angles near the perpendicular and parallel conditions have an increasing effect on the diameter of generated droplets, while flow rate, density and viscosity ratios, and other injection angles had a decreasing effect on the diameter.

关键词： Microfluidics Droplet formation Flow rate ratio Density ratio

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Author Correction: Effect of de novo transcriptome assembly on transcript quantification

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Scientific reports 2019年第1期9卷 18041页

作者： Ping-Han Hsieh Yen-Jen Oyang Chien-Yu Chen Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei 10617 Taiwan. Department of Computer Science and Information Engineering National Taiwan University Taipei 10617 Taiwan. Department of Bio-Industrial Mechatronics Engineering National Taiwan University Taipei 10617 Taiwan. chienyuchen@ntu.edu.tw. Genome and Systems Biology Program National Taiwan University and Academia sinica Taipei 10617 Taiwan. chienyuchen@ntu.edu.tw.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

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MAKER: Automated pill dispenser 123

MAKER: Automated pill dispenser

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123rd ASEE Annual Conference and Exposition

作者： Chariah, Christopher Kumia, Nicholas Zubarriain, Jonathan R. He, Shouling Rahemi, Hossein Jack, Hugh Mechatronics Engineering Program Vaughn College of Aeronautics and Technology United States Western Carolina University United States

This paper outlines a project idea for an Automated Pill Dispenser (APD) for home usage. It is developed using CAD software, 3D printed parts, Arduino Mega Microcontroller, continuous and non-continuous servos, optical sensors and a 5-inch LCD display interface to create a cost effective and reasonably priced alternative to the traditional medication dispensers. The design is modular and able to house up to four dispensing units on one control unit. The basic housing for the dispensing unit consists of three pieces which connect to the control unit which holds the LCD interface. The target users for this project are senior citizens. According to an article published in the New England Journal of Medicine, between 2007 and 2009, 99,628 emergency room visits were made by seniors. Two thirds of them were due to accidental overdoses. The design of the machine could be improved by adding a safety measure that would prevent an incorrect amount of pills being dispensed. Aside from this, the current design is effective in showing the potential safety benefits of a low cost at-home pill dispenser. © American Society for engineering Education, 2016.

关键词： Automation C++ programming Commercial modular design Medical assistance

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Experimental study on heat transfer of multi-walled carbon nanotubes/water nanofluids in horizontal microtubes 5

Experimental study on heat transfer of multi-walled carbon n...

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ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2016

作者： Karimzadehkhouei, Mehrdad Sadaghiani, Abdolali Khalili Sendur, Kürsat Pinar Mengüç, M. Kosar, Ali Mechatronics Engineering Program Faculty of Engineering and Natural Sciences Sabanci University Tuzla Istanbul Turkey Department of Mechanical Engineering Ozyegin University Istanbul34794 Turkey

ISBN: (纸本)9780791849651

In this study, heat transfer characteristics of multi-walled carbon nanotube based nanofluids were investigated in horizontal microtubes with outer and inner diameters of ∼1067 and ∼889 μm, respectively. Carbon nanotubes (CNTs) with outer diameter of 10-20 nm and length of 1-2 micron as nonspherical nanoparticles were used for nanofluid preparation, where water was considered as basefluid. Nanofluid was characterized using the Scanning Electron Microscopy (SEM). According to obtained results, deposited CNTs have considerable effect on the convective heat transfer inside the microtube. © 2016 by ASME.

关键词： Scanning electron microscopy

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An experimental study on flow boiling characteristics of phema nano-coated surfaces in a microchannel 5

An experimental study on flow boiling characteristics of phe...

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ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2016

作者： Sadaghiani, Abdolali Khalili Sisman, Yagmur Ince, Gözde Özaydin Kosar, Ali Mechatronics Engineering Program Sabanci University Tuzla Istanbul34956 Turkey Faculty of Engineering and Natural Sciences Sabanci University Tuzla Istanbul34956 Turkey

ISBN: (纸本)9780791849668

In this study, the effect of pHEMA (Polyhydroxyethylmethacrylate) nanostructure coated surfaces on flow boiling was investigated in a rectangular microchannel. Experiments were conducted using deionized water as the working fluid to investigate flow boiling in a microchannel with dimensions of 14 cm length, 1.5 cm width, and 500 μm depth. The effect of pHEMA coatings (coated on 1.5 × 1.5 cm2 silicon plates) on heat transfer coefficients and flow patterns was assessed and supported using a high speed camera system. Although the contact angle decreases on nano-coated surfaces, due to surface porosity, boiling heat transfer coefficient increases. Furthermore, visualization results indicated that uncoated surfaces experienced a smaller nucleate boiling region. It was also observed that dryout occurs at higher heat fluxes for coated surfaces. © 2016 by ASME.

关键词： Microchannels

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Design, implementation and control of dual axis self balancing inverted pendulum using reaction wheels

Design, implementation and control of dual axis self balanci...

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International Conference on Electrical and Electronics engineering, ELECO

作者： Abdullah Türkmen M. Yusuf Korkut Mustafa Erdem Ömer Gönül Volkan Sezer Mechatronics Graduate Program Istanbul Technical University Istanbul TURKEY Energy Institute Istanbul Technical University Istanbul TURKEY Dept. of Control and Automation Engineering Istanbul Technical University Istanbul TURKEY

Inverted pendulum systems have an important place in practice for control problems due to their nonlinear structures. It is a very difficult task to control the orientation and speed of objects and robots which are free in three dimensions. These systems constitute the substructure of many advanced systems. Conventional actuators may not be used in such applications due to various limitations. Under these circumstances usage of reaction wheels come into prominence. Reaction wheel based systems are used for orienting, coordinating and balancing of spacecraft, transport systems, and other such systems. In this study, dual axis self-balancing reaction wheel based inverted pendulum system which is a basis for many complex systems has been designed, manufactured and controlled.

关键词： Wheels Mathematical model DC motors Gravity State feedback Torque Aluminum

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A study for estimating reaction force of robot arm by using PDSPO

A study for estimating reaction force of robot arm by using ...

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International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

作者： Hyun Hee Kim Sun Oh Park Jin Ho Kyung Hyun Min Do Min Cheol Lee Interdisciplinary Program in Robotics Pusan National University Busan Korea School of Mechanical Engineering Pusan National University Busan Korea Department of Robotics and Mechatronics Korea Institute of Machinery and Materials Daejeon Korea

In the industrial field, assembling parts using robot arm requires force information. Some robot arms with torque sensors are commercially available, but they are difficult to use for industrial applications due to durability problems. In addition, mounting a torque sensor on the robot arm increases manufacturing costs and complicates the structure. In this study, we apply Sliding Perturbation Observer (SPO) to 7-axis robot manipulator and estimate reaction force without using torque sensor in simulation. From the estimated perturbation, it can be determined whether the end effector of the robot manipulator will crash part of the assembly.

关键词： Manipulators Service robots Robot sensing systems Collision avoidance Observers Force

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