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Analysis of Fluconazole in Human Urine Sample by High Performance Liquid Chromatography Method

Journal of Physics: Conference Series 2013年第1期423卷

作者： D Hermawan N A Md Ali W A Wan Ibrahim M M Sanagi Separation Science and Technology Group Ibnu Sina Institute for Fundamental Sciences Studies Faculty of Science Universiti Teknologi Malaysia 81310 Johor Bahru Malaysia Chemistry Study Program Faculty of Science and Engineering Jenderal Soedirman University Purwokerto Indonesia

A method for determination of fluconazole, antifungal drug in human urine by using reversed-phased high performance liquid chromatography (RP-HPLC) with ultraviolet (UV) detector was developed. Optimization HPLC conditions were carried out by changing the flow rate and composition of mobile phase. The optimum separation conditions at a flow rate 0.85 mL/min with a composition of mobile phase containing methanol:water (70:30, v/v) with UV detection at a wavelength 254 nm was able to analyze fluconazole within 3 min. The excellent linearity was obtained in the range of concentration 1 to 10 μg/mL with r2 = 0.998. The limit of detection (LOD) and limit of quantitation (LOQ) were 0.39 μg/mL and 1.28 μg/mL, respectively. Solid phase extraction (SPE) method using octadecylsilane (C18) as a sorbent was used to clean-up and pre-concentrated of the urine sample prior to HPLC analysis. The average recoveries of fluconazole in spiked urine sample was 72.4% with RSD of 3.21% (n=3).

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Design Management Review 2014年第1期25卷

作者： Woodie Flowers Sarah Stein Greenberg Richard K. Miller Srikant M. Datar Pappalardo Professor Emeritus of mechanical engineering at the Massachusetts Institute of Technology. He helped create MIT's renowned INTRODUCTION TO DESIGN COURSE. Flowers also received national recognition in his role as host for the PBS television series Scientific American Frontiers from 1990 to 1993 and received a New England EMMY Award for a special PBS program on design. He is a member of the National Academy of Engineering a Fellow of the American Association for the Advancement of Science and of the American Society of Mechanical Engineering and has received three honorary doctorates. He is a MacVicar Faculty Fellow for extraordinary contributions to undergraduate education at MIT where he is a member of the faculty advisory committee for MITX the Massachusetts Innovation & Technology Exchange. He was also the inaugural recipient of the Woodie Flowers Award from FIRST (For Inspiration and Recognition of Science and Technology). He recently received the Edward F. Church Medal and the Spira Outstanding Design Educator Award from ASME. Currently Flowers is a director or scientific advisor for four companies. He is also national advisor and chairman of the executive advisor board for FIRST. Has been managing director of the Hasso Plattner Institute of Design at Stanford University (also known as the d.school) since 2010. Previously she worked in the innovation practice of Monitor Group in the US and India and advised multinational companies on developing innovation capabilities. Her background includes developing new products and services in a number of emerging markets in Asia and Africa. In the classroom Stein Greenberg has co‐taught the d.school's foundational class Design Thinking Bootcamp and its renowned course on design for the developing world Entrepreneurial Design for Extreme Affordability. She recently launched an experimental new program featuring short‐format “pop‐up” classes. She holds an MBA from Stanford University and a BA in history from Oberlin College. Among other pursuits she s

Being a “gracious professional” is the key to leadership, whether you’re an engineer, a scientist, or an MIT professor. As managing director of Stanford University's ***, this Renaissance woman spends her time developing “adaptive learners.” Olin College's first president (and first employee) has plenty to say about engineering—and education. Rethinking the MBA at Harvard Business School.

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Development Model for Knowledge Management System (KMS) to Improve University's Performance (Case Studies in Indonesia University of Education)

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International Journal of Computer Science Issues 2012年第1 1-1期9卷 1-6页

作者： Munir Rohendi, Dedi Study Program of Computer Science Faculty of Mathematics and Sciences Education Indonesia University of Education Bandung Indonesia Mechanical Engineering Education Department Faculty of Technology and Vocational Education Indonesia University of Education Bandung Indonesia

Knowledge Management System (KMS) is one way to organize and documented the knowledge of institution. The purpose of this study is to develop a prototype KMS in organizing and documenting the knowledge in the university and to do a document aggregation based on the total number, subjects and writers (lecturers). The development method of KMS prototype is using sharepoints which are able to collect, store and publish all digital data available at the university which can be accessed online. Aggregation is using the percentage between the number of documents, subjects, and writers (lecturers). The aggregation's result between the number of digital files compared to the number of courses and the number of lecturers are each below 10%. In the future, the university still needs to encourage all lecturers or academic community to increase the collection of digital files that can indirectly improve the quality and educational services. © 2012 International Journal of Computer Science Issues.

关键词： Knowledge based systems

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Distinct mechanisms of FAK mechanoactivation by different extracellular matrix proteins

Distinct mechanisms of FAK mechanoactivation by different ex...

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第五届中美生物医学工程暨海内外生物力学学术研讨会

作者： Jihye Seong Arash Tajik Jie Sun Jun-Lin Guan Martin J.Humphries Susan E.Craig Asha Shekaran Andres J.Garcia Ning Wang Yingxiao Wang Neuroscience Program University of IllinoisUrbana-ChampaignUrbanaIL61801USA Department of Mechanical Science and Engineering University of IllinoisUrbana-ChampaignUrbanaIL61801USA Department of Bioengineering & Beckman Institute for Advanced Science and Technology University of IllinoisUrbana-ChampaignUrbanaIL61801USA Division of Molecular Medicine and Genetics Departments of Internal Medicine and Cell & Developmental BiologyUniversity of Michigan Medical SchoolAnn ArborMI48109USA Wellcome Trust Centre for Cell-Matrix Research Faculty of Life SciencesUniversity of ManchesterManchesterUK Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience Georgia Institute of TechnologyAtlantaGA30332USA Department of Biomedical Engineering School of Life Science and TechnologyHuazhong University of Science and Technology Department of Integrative and Molecular Physiology Center for Biophysics and Computational BiologyInstitute for Genomic BiologyUniversity of IllinoisUrbana-ChampaignUrbanaIL61801USA Department of Bioengineering University of CaliforniaSan DiegoCA92093USA

Introduction Cells can sense and respond to the mechanical microenvironment by converting forces into biochemical signals inside the cells,*** adhesions are the major sites of interaction between a cell and its extracellular matrix(ECM) microenvironment, thus outside mechanical signals can be sensed at focal adhesions through transmembrane receptor *** particular,it has been shown that matrix elasticity can control the cell fate

关键词： FAK Distinct mechanisms of FAK mechanoactivation by different extracellular matrix proteins ECM

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Solve inverse kinematics through a new quadratic minimization technique

Solve inverse kinematics through a new quadratic minimizatio...

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： Wei Wang Yuki Suga Hiroyasu Iwata Shigeki Sugano Department of Modern Mechanical Engineering School of Creative Science and Engineering Waseda University Tokyo Japan Faculty of Waseda Institute for Advanced Study Waseda University Tokyo Japan

A new technique was developed to solve inverse kinematics based on quadratic minimization. Firstly the inverse kinematic problem was formulated as a quadratic minimization problem through the constitution of a quadratic objective function derived from quaternion based kinematic description, then a new technique is developed to solve the quadratic minimization problem. The iteration procedures of the new technique are organized in two main phases: compute the search direction based on dynamic system synthesis; seek for acceptable step along the search direction. Numerical examples showed that inverse kinematic solutions can be delivered in a robust and time-efficient way, to meet the requirements coming across in the application field of every daily living support.

关键词： Kinematics Joints Manipulators Jacobian matrices Quaternions Minimization

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Application of UPFC to improve the LVRT capability of wind turbine generator

Application of UPFC to improve the LVRT capability of wind t...

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Australasian Universities Power engineering Conference, AUPEC

作者： Yasser M. Alharbi A. M. Shiddiq Yunus A. Abu Siada Electrical and Computer Engineering Department Curtin University of Technology Perth Australia Mechanical Engineering Department Energy Conv. Study Program State of Polytechnic Ujung Pandang Makassar Indonesia

Variable speed wind turbine generators installation has been significantly increased worldwide in the last few years. Voltage sag at the grid side may call for the disconnection of the wind turbine from the grid as under such faults it may not comply with the recent developed grid codes for wind energy conversion systems (WECS). In this paper, a Unified Power Flow Controller (UPFC) is applied to improve the low voltage ride through (LVRT) capability of doubly fed induction generator (DFIG)-based WECS during voltage sag at the grid side. Simulation is carried out using MATLAB/Simulink software. Results show that UPFC can significantly improve the LVRT capability of DFIG-based WECS and hence maintaining wind turbine connection to the grid during certain levels of voltage sag at the grid side.

关键词： Voltage fluctuations Wind turbines Reactive power Voltage control Power system stability Generators Wind energy

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Impact of intermittent misfire and fire-through on the performance of full converter based WECS

Impact of intermittent misfire and fire-through on the perfo...

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Australasian Universities Power engineering Conference, AUPEC

作者： A. M. Shiddiq Yunus M. A. S. Masoum A. Abu Siada Mechanical Engineering Department Energy Conv. Study Program State of Polytechnic Ujung Pandang Makassar Indonesia Electrical and Computer Engineering Department Curtin University of Technology Perth Australia

The integration of wind turbines into modern power grids has significantly increased during the last decade. The wind turbine equipped with full converter based wind energy Conversion System (FCWECS) represented about 20.3% of the worldwide total wind capacity in 2003. Since FCWECS is equipped with a voltage source inverter (VSI), it is vulnerable that misfire and fire-through may occur within the VSI switches. In this paper, impact of these switching malfunctions on FCWECS performance is investigated and discussed. Detailed simulations of the system under study are carried out using Matlab/Simulink to highlight the influence of these converter internal faults on PCC voltage, DC link voltage and shaft speed, as well as generator active and reactive power. Furthermore, compliance of the FCWECS with Spain fault ride through (FRT) grid codes is also investigated.

关键词： Inverters Wind turbines Generators Educational institutions Reactive power Voltage fluctuations Insulated gate bipolar transistors

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Intuitive Operation of A Wheelchair Mounted Robotic Arm for The Upper Limb Disabled: The Mouth-only Approach

Intuitive Operation of A Wheelchair Mounted Robotic Arm for ...

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IEEE International Conference on Robotics and Biomimetics

作者： Wei Wang Zeming Zhang Yuki Suga Hiroyasu Iwata Shigeki Sugano Department of Modem Mechanical Engineering Graduate School of Creative Science and Engineering Waseda University Tokyo 169-8555 Japan Faculty of Waseda Institute for Advanced Study Waseda University Tokyo 162-0044 Japan Faculty of Department of Modem Mechanical Engineering School of Creative Science and Engineering Waseda University Tokyo 169-8555 Japan

ISBN: (纸本)9781467321259

A new interfacing device that enables intuitive operation of a wheelchair mounted robotic arm is proposed. Three kinds of physical signals: jaw movement, breathing strength and head movement are captured using this device, and then be used to drive motion primitives of robotic arm in an intuitive way. This device is designed to operate in a mouth-only manner, thus enables usage for the upper limb disabled. Experiments are also conducted making use of this device and wheelchair mounted robotic arm to complete tasks in activities of daily living.

关键词： upper limb head movement then

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Wheeled Inverted-Pendulum-Type Personal Mobility Robot with Collaborative Control of Seat Slider and Leg Wheels

Wheeled Inverted-Pendulum-Type Personal Mobility Robot with ...

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IEEE/RSJ International Conference on Intelligent Robotics and Systems

作者： Nobuyasu Tomokuni Motoki Shino Department of IRT Systems Study Information and Robot Technology Research Initiative The University of Tokyo Tokyo Japan is currently with the Department of Intelligent Mechanical Engineering Faculty of Engineering Kinki University Hiroshima Japa Department of Mechanical Engineering The University of Tokyo Tokyo Japan.

ISBN: (纸本)9781467317375

In this paper, we describe the motion control for a personal mobility robot (PMR) that is a wheeled inverted pendulum vehicle. The structure of the PMR consists of a seat slider and two independent leg wheels attached on either side;this enables the driver to mount the PMR by changing the vehicle's height from the squatting position to the standing position. In addition, this structure can control the roll posture of the vehicle and thus prevent the PMR from toppling over because of a short tread. The seat slider facilitates a stable pitch posture with suitable control. We present an overview of the kinematic structure, three-dimensional dynamics model, and control method based on the linear-quadratic regulator (LQR), in order to achieve stable control of the PMR.

关键词： Leg Wheels LQR PMR

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Impact of DC-Link Fault on the Dynamic Performance of DFIG

Impact of DC-Link Fault on the Dynamic Performance of DFIG

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IEEE Power and Energy Society General Meeting

作者： A. M. Shiddiq Yunus A. Abu-Siada Mohammad A. S. Masoum the Department of Mechanical Engineering Energy Conversion Study Program State Polytechnic of Ujung Pandang Perintis Kemerdekaan KM. 10 Makassar 90215 Indonesia the Department of Electrical and Computer Engineering Curtin University Perth WA 6845 Australi

ISBN: (纸本)9781467327275

The number of doubly fed induction generators (DFIG) connected to the existing network has increased significantly worldwide during the last two decades. This triggers off manufactures to improve the performance of DFIG through robust and reliable design. The stator in DFIG is directly connected to the grid whereas the rotor is interfaced to the grid through two voltage source converters;rotor side converter (RSC) and grid side converter (GSC), which are considered as the crux of the DFIG system. The converter stations determine the ability of wind turbine to operate optimally during wind speed fluctuation and it can provide reactive power support to the grid during grid disturbance events. The DC capacitor link between the two converters allows optimum and smooth power exchange between DFIG and the grid. Therefore, any faults within the DC link will affect the overall performance of the DFIG. This paper investigates the impact of open circuit and short circuit faults in the DC link capacitor on the dynamic performance of the DFIG. The compliance of the wind energy conversion (WEC) system with different grid codes such as those of Denmark, Spain, Nordic and Sweden under such faults is also investigated.

关键词： Index Terms-DFIG Grid side converter Rotor side converter Fault ride through dynamic characteristics DC link dc-link capacitor grids Converters Grid computing faults Circuit faults power markets Crux hydraulic props Manufactured products voltage source Stators Grid

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