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IEEE International Conference on Robotics, Biomimetics, and Intelligent Computational Systems (ROBIONETICS)

作者： Fransiscus Xaverius Johan Endra Joelianto Augie Widyotriatmo Salmah Engineering Physics Study Program ITB Bandung Indonesia Faculty of Industrial Technology ITB Bandung Indonesia Dept. of Mathematics Gadjah Mada University Yogyakarta Indonesia

This paper presents an application of altitude control for quadrotor. The proposed control algorithm is a model based non linear control using a vision-based localization system. The control function is derived from the dynamical system of the quadrotor. In the experiment, parameter adjustment is carried out by observing dynamic performances. Experimental shows that the quadrotor can produce satisfactory response by using the system arrangement.

关键词： Zigbee Pulse width modulation

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Selective surface functionalization at regions of high local curvature in graphene

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Chemical Communications 2013年第7期49卷 677-679页

作者： Wu, Qingzhi Wu, Yaping Hao, Yufeng Geng, Jianxin Charlton, Matthew Chen, Shanshan Ren, Yujie Ji, Hengxing Li, Huifeng Boukhvalov, Danil W. Piner, Richard D. Bielawski, Christopher W. Ruoff, Rodney S. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Center Wuhan University of Technology Wuhan 430070 China Department of Mechanical Engineering Department of Materials Science Department of Engineering Program The University of Texas at Austin Austin TX 78712 1 University Station C2200 United States Department of Chemistry and Biochemistry The University of Texas at Austin Austin TX 78712 1 University Station A1590 United States School of Computational Sciences Korea Institute for Advanced Study Seoul 130-722 South Korea ) School of Chemical and Biological Engineering Seoul National University Seoul 151-742 South Korea

Monolayer graphene was deposited on a Si wafer substrate decorated with SiO2 nanoparticles (NPs) and then exposed to aryl radicals that were generated in situ from their diazonium precursors. Using micro-Raman mapping, the aryl radicals were found to selectively react with the regions of graphene that covered the NPs. The enhanced chemical reactivity was attributed to the increased strain energy induced by the local mechanical deformation of the graphene. © The Royal Society of Chemistry.

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A Mathematical Model for the Velocity Profile Internally to a Conical Diffuser

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Journal of Energy and Power engineering 2013年第8期7卷 1472-1477页

作者： Disterfano Lima Martins Barbosa Jerson Rogerio Pinheiro Vaz Daborah Aline Tavares Dias do Rio Vaz Sivio Wesley Oliveira Figueiredo Marcelo Oliveira da Silva Andre Luiz Amarante Mesquita Claudio JoseCavalcante Blanco Faculty of Mechanical Engineering Institute of Technology Federal University of Par6 Bel~m 66075-110 Brazil Natural Resources Engineering Post-Graduation Program Institute of Technology Federal University of Par6 Bel~m 66075-110Brazil Faculty of Sanitary and Environmental Engineering Institute of Technology Federal University of Parci BelOm 66075-110 Brazil

The use of diffusers around the horizontal-axis wind turbines has been widely studied since the diffuser improves the power coefficient of the turbine and it is often called DAWTs （diffuser augmented wind turbines）.Turbines using diffuser are called DWATs （Diffuser Augmented Turbines）,and have efficiency bigger than the Betz limit （maximum energy flow extracted = 59.26%）. Thus, this study presents a mathematical model describing the behavior of the velocity profile internally to a diffuser according to the characteristics of flow and geometry of a conical diffuser. The results are compared with experimental data and show good agreement.

关键词： DAWTs diffuser renewable energy.

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Characteristic Behaviors in Compressive Strength of Two-Dimensional Aggregates

Characteristic Behaviors in Compressive Strength of Two-Dime...

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2013 Asian Pacific Conference on Chemical,Material and Metallurgical engineering(APCCMME 2013)

作者： Sarunya Promkotra Tawiwan Kangsadan Department of Geotechnology Faculty of Technology Khon Kaen University Chemical and Process Engineering Program Department of Mechanical and Process EngineeringThe Sirindhorn International Thai-German Graduate School of Engineering (TGGS) King Mongkut’s University of Technology North Bangkok (KMUTNB)

A selected material, polystyrene microsphere series, is created as a building block of two-dimensional(2D) aggregates to examine scaling behaviors of the compressive stress condition. The 2D aggregated clusters are confined between the two cantilevers of 30 micron in diameter. These cantilevers can slide and force the aggregates move in the lateral direction. The compressive yield stress is directly measured during experiments by quantitative image analysis on the optical microscope. Locations of polystyrene aggregates are traced by Discrete Element Method(DEM), computer simulation. The 2D mechanical properties are examined for the particle size scaling behaviors as a function of particle area fraction and the average particle coordination number. The larger the particle size, the greater the modulus and the yield stress.

关键词： Compressive strength 2D aggregation colloids discrete element method(DEM)

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Statistical Analysis of Mercury Data from Soil Survey in Non-volcanic Geothermal System: A Case study in Sulawesi

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Procedia Earth and Planetary Science 2013年 6卷 212-218页

作者： Suryantini Applied Geology Research Division (KK GeologiTerapan) Faculty of Earth Sciences and Engineering (FITB) InstitutTeknologi Bandung (ITB) Jl. Ganesha 10 Bandung 40132 Indonesia Geothermal Technology Study Program FTTM ITB Bandung Indonesia

Mercury analysis from soil survey is one of the standard methods in geothermal exploration surveys conducted by Center for Survey and Geological Data or PSDG (formerly DIM). The objective of this paper is to analyze thresholds of four non volcanic geothermal systems in Sulawesi, i.e. Suwawa, Marana, Pincara and Mangolo. The value of Hg (ppb) is differ from one prospect to another. Its value ranges from tens ppb up to few thou sands ppb, depends on the geology and geothermal system; in high temperature volcanic geothermal system, or in non-volcanic geothermal system. Therefore determination of threshold that separate background and anomaly is important for better delineation of Hg anomaly area. Prior to threshold determination, a probability plot is used to examine the normality and the existence of sub population within the data. Sub population located at the end left of probability graph or sub population with the lowest range value is assumed containing the background and threshold information. The threshold is then calculated using mean plus one standard deviation of data within this sub population. Comparison of the calculated number with the published threshold value shows very significant difference in term of anomaly area coverage for further exploration target. This paper demonstrates Exploratory Data Analysis (EDA) techniques that can be applied as a tool to determine threshold value. The results suggest that this statistical methodis able to assist and support a better threshold value determination.

关键词： Mercury Exploratory Data Analysis Non-volcanic geothermal system Sulawesi

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Hardware-based parallel firefly algorithm for embedded applications

Hardware-based parallel firefly algorithm for embedded appli...

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NASA/ESA Conference on Adaptive Hardware and Systems (AHS)

作者： Daniel M. Muñoz Carlos H. Llanos Leandro dos Santos Coelho Mauricio Ayala-Rincón Electronics Engineering Graduate Program Faculty of Gama University of Brasilia Brasilia DF Brazil Department of Mechanical Engineering University of Brasilia Brasilia DF Brazil Industrial and Systems Engineering Graduate Program LAS/PPGEPS Pontifical Catholic University of Parana Curitiba Parana Brazil Departments of Computer Science and Mathematics University of Brasilia Brasilia DF Brazil

ISBN: (纸本)9781467363822

The firefly algorithm (FA) is a new population-based metaheuristic bioinspired on the behavior of the flashing characteristics of fireflies. As a population-based algorithm, the FA suffers from large execution times specifically for embedded optimization problems with computational limitations. For reducing execution times we propose a hardware parallel architecture of the FA algorithm that facilitates the implementation in Field programmable Gate Arrays (FPGAs). In addition, this work proposes the application of the opposition-based learning (OBL) approach to the FA algorithm. The respective hardware implementation (HPOFA) was mapped into a Virtex5 FPGA device and numerical experiments using four well-known benchmark problems demonstrate that the opposition-based approach allows the FA algorithm to improve its functionality, preserving the swarm diversity and avoiding the premature convergence problem. Synthesis results point out that the HPOFA architecture is effectively mapped in hardware and is suitable for embedded applications.

关键词： Hardware Computer architecture Optimization Equations Random access memory Field programmable gate arrays Search problems

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Clustering spatial on the GSTAR model for replacement new oil well

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AIP Conference Proceedings 2013年第1期1554卷 205-209页

作者： Budi Nurani Ruchjana Atje Setiawan Abdullah Toni Toharudin I Gede Nyoman Mindra Jaya Department of Mathematics Faculty of Mathematics and Natural Sciences Universitas Padjadjaran Indonesia Informatics Engineering Study Program Faculty of Mathematics and Natural Sciences Universitas Padjadjaran Indonesia Department of Statistics Faculty of Mathematics and Natural Sciences Universitas Padjadjaran Jl Raya Bandung Sumedang Km 21 Jatinangor Sumedang 45363-West Java Indonesia

Space time models such as the Generalized Space Time Autoregressive (GSTAR) is an important theoretical research topics with many applications in large number of areas ranging from the spread of diseases, mining, economic growth, ecology, agriculture and population development. In this paper we introduce a clustering spatial for determining a group of locations for weight matrix of the GSTAR model. We use Ordinary Least Squares method to estimate the parameters of model and apply the result to develop a GSTAR-Kriging model for replacement new oil wells at volcanic field in Jatibarang, West Java-Indonesia.

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The effects of stent porosity on the endovascular treatment of intracranial aneurysms located near a bifurcation

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Journal of Biomedical Science and engineering 2013年第8期6卷 812-822页

作者： Abraham Yik-Sau Tang Hiu-Ning Chan Anderson Chun-On Tsang Gilberto Ka-Kit Leung Kar-Ming Leung Alfred Cheuk-Hang Yu Kwok-Wing Chow Department of Mechanical Engineering University of Hong Kong Hong Kong China Department of Neurosurgery Kwong Wah Hospital Hong Kong China Division of Neurosurgery Department of Surgery Li Ka Shing Faculty of Medicine University of Hong Kong Queen Mary Hos-pital Hong Kong China Medical Engineering Program Department of Electrical and Electronic Engineering University of Hong Kong Hong Kong China

Intracranial aneurysm occurs when a cerebral artery develops an abnormal sac-like dilatation, and will cause massive bleeding in the subarachnoid space upon rupture. Endovascular stenting is a minimally invasive procedure in which a flow-diverting stent is deployed to cover the aneurysm neck, thereby restricting blood from entering the aneurysm and reducing the risk of rupture. The stent porosity, a crucial factor determining the intra-aneurysmal hemodynamics following treatment, is investigated by computational fluid dynamics techniques. Based on the computational results, a low porosity stent will dramatically reduce the flow velocity and the flow rate inside the side branch vessel. Conversely, a high porosity stent may not provide adequate flow reduction inside the aneurysm, possibly causing treatment failure. An advisable range of optimal stent porosity would be 60% to 75%, which can drastically reduce the flow rate into the aneurysm while preserving enough blood flow for the side branch vessel. Clinically, deployment of two or more flow-diverting stents may not increase treatment efficacy but can potentially lead to adverse effects due to side-branch hypoperfusion. The present quantitative analysis can also provide practical insight for future stent design.

关键词： Intracranial aneurysm Endovascular Treatment Stent Stent Porosity Computational Fluid Dynamics

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A Lattice Boltzmann Based Immersed Boundary Method for Fluid-Structure Interaction

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Sixth International Conference on Nonlinear Mechanics

作者： J.F.Yang Z.D.Wang Y.K.Wei Y.H.Qian Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai Program for Innovative Research Team in UniversitiesShanghai University Faculty of Mechanical Engineering and Automation Zhejiang Sci-Tech University Shanghai Institute of Applied Mathematics and Mechanics Shanghai University

ISBN: (纸本)9781605951096;1605951099

An immersed boundary-lattice Boltzmann method(IB-LBM) is presented for simulating the two-dimensional flows over a circular *** this model,the velocity is contributed by two *** is from the density distribution function and the other is from the body *** makes the non-slip boundary condition at the solid wall enforced.A Dirac function is introduced in this work to make the exchange of information between lattice nodes and control points *** presents that the locality of the LBM scheme is *** present results for the steady flows compare very well with available data in the literature.

关键词： Lattice Boltzmann Immersed boundary-lattcie Boltzmann method Fluid structure interaction

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Subcutaneous Preadipocytes Are Ideal Candidate To Produce A Large Number Of Functional Platelets In a Culture System

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BLOOD 2013年第21期122卷 3271-3271页

作者： Ono-Uruga, Yukako Tanaka, Tatsuya Igari, Atsuko Moriki, Takanori Yokoyama, Kenji Zama, Takeru Horiuchi, Tadashi Murata, Mitsuru Ikeda, Yasuo Suda, Toshio Matsubara, Yumiko Strategic Feasibility Study Program Kanagawa Academy of Science and Technology Kanagawa Japan Faculty of Science and Engineering Life Science and Medical Bioscience Waseda University Tokyo Japan Department of Laboratory Medicine Keio University School of Medicine Tokyo Japan Division of Hematology Department of Internal Medicine Keio University School of Medicine Tokyo Japan Department of Otorhinolaryngology Keio University School of Medicine Tokyo Japan Department of Biochemistry Keio University School of Medicine Tokyo Japan Department of Cell Differentiation The Sakaguchi Laboratory of Developmental Biology Keio University School of Medicine Tokyo Japan

Platelet transfusions are widely used for patients with severe thrombocytopenia. There are, however, practical problems in the current donor-dependent platelet transfusions, such as the limited supply and risk of serious immune reactions. Thus, the development of new strategies for generating platelets for transfusion is crucial. Platelets have been differentiated from hematopoietic stem cells, fetal liver cells, embryonic stem cells, induced pluripotent stem cells, NF-E2-transduced fibroblasts, and preadipocytes. Here, among these cells preadipocytes, especially in the subcutaneous adipose tissue, could be ideal candidate cells for manufacturing megakaryocytes (MKs) and platelets, because (1) they are relatively easy to obtain large quantities and have ability to proliferate in vitro, (2) their differentiation does not require gene transfer, as they possess genes in relation to megakaryopoiesis and thrombopoiesis, such as p45NF-E2 and c-mpl, and (3) they differentiate into MKs and platelets using an endogenous thrombopoietin. Thus, to clarify the usefulness of preadipocytes as a donor-independent source for platelet transfusion, we compared both number and function between platelets derived from mouse subcutaneous preadipocytes and those from bone marrow mononuclear cells (BMMNCs), the established cell source for manufacturing platelets. First, BMMNCs were not feasible for their expansion in vitro and therefore the cells were directly seeded in MK lineage induction media. In contrast, preadipocytes were to be passaged 6 times without any morphological changes, and then cultured in MK lineage induction media for their differentiation into platelets. Thus, as assessed by CD41-positive platelet-sized cells, 106.2±5.0 ×10 5 or 3.9±1.0 ×10 5 platelets were obtained from 10 6 preadipocytes or 10 6 BMMNCs, respectively (p<0.01). To next analyze platelet function, the binding of Alexa Fluor 488-labaled fibrinogen to CD41-positive platelet-sized cells, as assessed by mean f

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