Relevant bibliographies by topics / Mechanical pencils

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Mechanical pencils'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Mechanical pencils"

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NAKAYAMA, Kyo. "KURUTOGA the Next Generation of Mechanical Pencils." Journal of the Society of Mechanical Engineers 112, no. 1093 (2009): 964–65. http://dx.doi.org/10.1299/jsmemag.112.1093_964.

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Flexer, Roberta J., and Naomi Rosenberger. "Beware of Tapping Pencils." Arithmetic Teacher 34, no. 5 (1987): 6–10. http://dx.doi.org/10.5951/at.34.5.0006.

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Advocates of a new, “magical” method for teaching addition, subtraction, multiplication, and division are attracting the attention of many elementary chool teachers. The method involves teaching children to tap reference points on numeral to count out sums, differences, and products. Teacher like it because it's easy. Student catch on quickly and get the right answers. Even students who might have had trouble with arithmetic before can tap out correct answers. What's the problem, then? To a mathematics educator, the problem with the new “magic” is that a mechanical technique for getting answers is displacing learning with understanding.
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Liu, Yan, Hai Wang, Wei Zhao, Min Zhang, and Hongbo Qin. "Pencil-on-paper flexible electronics for daily sensing applications." Circuit World 45, no. 4 (2019): 189–95. http://dx.doi.org/10.1108/cw-05-2018-0037.

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Purpose Inspired by the development of eco-friendly flexible electronics, this paper aims to present a series of paper-based electronics drawn by pencils, which can be used as favorable sensing elements in daily life. Design/methodology/approach Pencil traces are deposited on the porous surface of Xerox paper by the mechanical exfoliation during writing process, which can be used as basic components to construct functional electronics for daily sensing applications. By changing pencil grade, the obtained traces can work as conductive wires, electrodes, resistors and piezoresistive gauges. Findings The experimental results confirm their practical applications in sensing several daily activities, including finger motion, touching and the temperature of water in paper cup. Moreover, the used electronics can be easily handled and recycled. Research limitations/implications The shortage in functionality, reliability and performance consistency induced by manual operation is an evident challenge, which makes the pencil-on-paper devices more suitable to work as a temporary solution to satisfying the demands from emergency circumstances. Originality/value The pencil-on-paper devices, motivated by the electroconductibility and piezoresistivity of pencil trace, can be explored as sensing prototypes in detecting daily activities. Meantime, their advances in easy accessibility, rapid fabrication, low cost and eco-fitness endow them excellent capacity of meeting the “on-site, real-time” demands.
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Liao, Chun-An, Yee-Kwan Kwan, Tien-Chan Chang, and Yiin-Kuen Fuh. "Ball-Milled Recycled Lead-Graphite Pencils as Highly Stretchable and Low-Cost Thermal-Interface Materials." Polymers 10, no. 7 (2018): 799. http://dx.doi.org/10.3390/polym10070799.

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A simple and sustainable production of nanoplatelet graphite at low cost is presented using carbon-based materials, including the recycled lead-graphite pencils. In this work, exfoliated graphite nanoplatelets (EGNs), ball-milled exfoliated graphite nanoplatelets (BMEGNs) and recycled lead-graphite pencils (recycled 2B), as well as thermally cured polydimethylsiloxane (PDMS), are used to fabricate highly stretchable thermal-interface materials (TIMs) with good thermally conductive and mechanically robust properties. Several characterization techniques including scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) showed that recycled nanoplatelet graphite with lateral size of tens of micrometers can be reliably produced. Experimentally, the thermal conductivity was measured for EGNs, BMEGNs and recycled 2B fillers with/without the effect of ball milling. The in-plane thermal conductivities of 12.97 W/mK (EGN), 13.53 W/mK (recycled 2B) and 14.56 W/mK (BMEGN) and through-plane thermal conductivities of 0.76 W/mK (EGN), 0.84 W/mK (recycled 2B) and 0.95 W/mK (BMEGN) were experimentally measured. Anisotropies were calculated as 15.31, 15.98 and 16.95 for EGN, recycled 2B and BMEGN, respectively. In addition, the mechanical robustness of the developed TIMs is such that they are capable of repeatedly bending at 180 degrees with outstanding flexibility, including the low-cost renewable material of recycled lead-graphite pencils. For heat dissipating application in high-power electronics, the TIMs of recycled 2B are capable of effectively reducing temperatures to approximately 6.2 °C as favorably compared with thermal grease alone.
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Chu, Moody T., and Nicoletta Del Buono. "Total decoupling of general quadratic pencils, Part I: Theory." Journal of Sound and Vibration 309, no. 1-2 (2008): 96–111. http://dx.doi.org/10.1016/j.jsv.2007.05.058.

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Boley, Daniel. "Computing rank-deficiency of rectangular matrix pencils." Systems & Control Letters 9, no. 3 (1987): 207–14. http://dx.doi.org/10.1016/0167-6911(87)90042-9.

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Gäbler, Jan, Lothar Schäfer, Bernd Menze, and Hans-Werner Hoffmeister. "Micro abrasive pencils with CVD diamond coating." Diamond and Related Materials 12, no. 3-7 (2003): 707–10. http://dx.doi.org/10.1016/s0925-9635(03)00059-1.

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Tan, Shaohua, and Joos Vandewalle. "A canonical form for regular pencils of matrices." Systems & Control Letters 7, no. 5 (1986): 373–76. http://dx.doi.org/10.1016/0167-6911(86)90055-1.

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Chang, F. R., and H. C. Chen. "The generalized Cayley-Hamilton theorem for standard pencils." Systems & Control Letters 18, no. 3 (1992): 179–82. http://dx.doi.org/10.1016/0167-6911(92)90003-b.

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Brady, M., and S. Peterson. "A Derivation of the Pole Curve Equations in the Projective Plane." Journal of Mechanical Design 117, no. 1 (1995): 123–28. http://dx.doi.org/10.1115/1.2826096.

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Traditional four-position mechanism synthesis focuses on the poles corresponding to four displacements of a rigid body. From these poles equations for the center-point and circle-point curves are developed. However, if a pole is infinite (the associated displacement is a pure translation), the established derivations for the pole curve equation break down. One can eliminate this problem by expressing the pole curve equation in the projective plane, because all points, including points at infinity, have finite homogeneous coordinates. In this paper, the pole curve equation is derived in the projective plane. This projection derivation is an analytic expression of Alt’s graphical construction of the pole curve. The pole curve is the intersection of a pair of projective pencils of circles (one pencil for opposite sides of the opposite-pole quadrilateral) which are defined by the homogeneous coordinates of the poles. The resulting equations are applied to several problems in the synthesis of four-bar linkages. In addition the rotation curves, the locus of displacement poles for a four-bar linkage, are computed for linkages with sliding joints.
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Dissertations / Theses on the topic "Mechanical pencils"

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Elkordy, Nadia S. "Determining the feasibility of making bamboo charcoal pencil leads in developing countries using graphite pencil lead manufacturing processes." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45796.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.<br>Includes bibliographical references (p. 44).<br>Many organizations seek to alleviate poverty in the developing world. One organization in particular strives to improve the livelihood of people in poverty through the technical development of and training in bamboo and rattan enterprises, the International Network for Bamboo and Rattan (INBAR). A team in the Spring 2008 D-Lab: Design class has been collaborating with members of INBAR located in India to develop the processes and tools necessary to make pencils from bamboo, rather than wood. The communities that launch this enterprise will need to outsource the glue and graphite leads required to complete the pencils. Waste is generated by cutting processes used to dimension the bamboo to appropriate pencil size and from the parts of the bamboo stalk that cannot be used in pencils, the nodes. If this bamboo waste is carbonized to charcoal, it can be made into pencil leads, eliminating the need for communities to purchase graphite leads from an external source. Manufacturing pencil leads from bamboo waste could raise the profit generated by the enterprise, create more jobs, and help to alleviate poverty in regions of the world where it is widespread. This thesis presents factors affecting the feasibility of using graphite pencil lead manufacturing processes to make bamboo charcoal pencil leads using clay as a binder. The feasibility is determined by modeling industrial-scale graphite pencil lead manufacturing techniques with small-scale methods that are replicable in a developing country and then comparing the resulting charcoal lead performance to graphite lead performance qualities, including the ability of the lead to write smoothly on paper and its ability to be erased. Experimentation conducted found that vitrification of the charcoal leads is possible at kiln temperatures in excess of 1250 °C and that a sufficiently reducing environment could be simulated using a capped steel nipple. However, a higher performance lead that makes marks comparable to a graphite pencil lead can be attained by simply heat-drying or sintering the charcoal pencil leads and coating them in wax.<br>by Nadia S. Elkordy.<br>S.B.
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Hohenberger, Matthew Paul. "Design and fabrication of a pencil shoulder cutting device for a novel endcap." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/83719.

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Thesis (S.B.)--Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 31).<br>The pencil shoulder cutting device is a stepper motor driven mechanism to cut a small groove into the end of a pencil, which is needed for a novel seed-capsule endcap for a new pencil called Sprout. The pencil was developed by a team of MIT graduate students, and the shoulder cutting device is one step in an automated assembly process for Sprout. The device autonomously cuts a 0.0075in. deep shoulder into one end of the pencil using a 0.25in. end mill. The device includes a stabilizing sleeve that reduces vibration of the pencil during machining, and creates a vacuum seal so that chips from the pencil are cleanly removed. The cutting time for each pencil is 2s, with an absolute accuracy of 3.1x10-4 in. for the depth of cut after ten tests with the machine. The capsules fit correctly onto the shoulders when done by hand, and the design will be confirmed once the entire machine is running autonomously.<br>by Matthew Paul Hohenberger.<br>S.B.
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Del, Castillo Eric A. (Eric Anthony). "The design and manufacture of mass production equipment for a pencil with a seed." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/83707.

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Thesis (S.B.)--Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 18).<br>Autosprout is the mass manufacturing equipment envisioned to produce Sprout, a pencil with a seed. This pencil concept was developed by MIT students a successful round of funding and first production run through Kickstarter. The goals for Autosprout are to fully automate the manufacturing process, and to reduce the manufacturing costs from eighty cents per pencil to less than thirty, while also producing a completely assembled pencil every five seconds. The original assembly process was slow and required a lot of manpower. However, it laid a foundation to design the automated process described in this thesis. The new system will feature two carousel systems. The first carousel will load the cedar pencil, cut a shoulder using a specially designed router, and finally add a dab of glue around the shoulder. The second carousel will load a pill capsule body and fill it with soil and two to three seeds. At the end of each carousel process the pill capsule and pencil will come together and the capsule will be placed onto the shoulder and the glue will hold it in place. Before the capsule is loaded into the carousel, it must be sorted and properly aligned. Models for a vibratory feeder were first designed and tested, but, due to the inconsistent performance of the models, an industrial vibratory feeder was purchased and modified. The modification consists of a chute leading to a vacuum system that removes the capsule from the feeder, rotates, and finally loads the capsule into the carousel by switching a valve making the vacuum into a stream of high air pressure. A similar system will be used for removing seeds from a hopper and placing them in the capsule.<br>by Eric A. Del Castillo.<br>S.B.
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Chen, Hamilton. "O processo de decisão de compra de varejista de papelaria: um estudo de caso sobre a sua decisão." reponame:Repositório Institucional do FGV, 2007. http://hdl.handle.net/10438/5556.

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Made available in DSpace on 2010-04-20T20:20:01Z (GMT). No. of bitstreams: 1 149577.pdf: 249444 bytes, checksum: 0886870205bbb58b6dd47f087f3d36ce (MD5) Previous issue date: 2007-10-10T00:00:00Z<br>A competição acirrada no mercado têm obrigado os varejistas a avaliar produtos com bastante critério antes de adquiri-los. Nas papelarias, o mesmo ocorre com a compra de instrumentos de escrita. Nesta dissertação é analisado o processo de compra de lapiseiras. Atualmente existe uma infinidade de modelos de lapiseiras com diferentes cores, estampas, cheiros, preços e fornecedores. Como escolher para que tenham alto giro no ponto-de-venda, minimizando os custos e maximizando os ganhos, torna-se o grande desafio para a organização que pretende continuar competitiva. Para aumentar o conhecimento sobre esse processo, esta dissertação teve como propósito investigar as variáveis que influenciam a decisão do comprador varejista, dono de papelaria. Foram realizados dois estudos de caso com papelarias. Por fim, descobriu-se que a decisão do comprador de lapiseiras não se restringe ao produto. Existem diversas variáveis que podem influenciar a sua decisão, como o representante, a distribuição efetiva, a garantia e o marketing (comunicação).
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Gotowka, Brendan Reed. "Analysis of 2-axis pencil beam sonar microbathymetric measurements of mine burial at the Martha's Vineyard Coastal Observatory." Thesis, Monterey, California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/1736.

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CIVINS<br>The changing state of warfare has driven the US Navy's area of operations closer to shore into littoral coastal waters. Mine Warfare has been proven as an extremely effective means of battlespace control in these waters. Mines can be inexpensively mass produced and rapidly deployed over large areas. The most common type of mine in use is the bottom placed mine, an object with simple geometry that sits on the seafloor. These mines often exhibit scour induced burial below the seafloor, making detection through traditional mine hunting methods difficult or impossible, while the mines themselves remain lethal. The Office of Naval Research (ONR) has developed a computer model that predicts the extent of mine burial to aid mine hunting and mine clearing operations. Investigations under ONR's Mine Burial Program are presently being conducted to calibrate and validate this model. This thesis uses data from the deployment of an acoustically instrumented model mine near the Martha's Vineyard Coastal Observatory in part of a larger, 16 total object investigation. A 2-axis pencil beam sonar was deployed concurrently with the mine to obtain microbathymetric measurements of the scour pit development and the progression of mine burial. Data correction techniques to correct for beam pattern induced bathymetry errors and a transformed coordinate system are detailed within. An analysis of scour pit dimensions includes scour depth, area, and volume as well as a look into percent burial by depth as a characteristic measurement important for operational mine hunting. The progression of mine burial is related to the wave climate, unsteady flow hydrodynamic forcing, and bed-load transport. The analysis examines the relative roles of these mechanisms in the scour-infill-bury process.
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Books on the topic "Mechanical pencils"

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Standardization, International Organization for. Mechanical pencils. ISO, 1989.

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Standardization, International Organization for. Mechanical pencils. ISO, 1989.

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Veley, Jonathan A. The catalogue of American mechanical pencils. Greyden Press, LLC, 2011.

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Strongman, Luke. The mechanical pencil: Concepts in distance education. BrownWalker Press, 2013.

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M, Kirkpatrick James, ed. Basic drafting using pencil sketches and AutoCAD. Prentice Hall, 2003.

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Learning basic drafting using pencil sketches and AutoCAD. Prentice Hall, 1999.

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Collecting Pencils: A short guide to vintage mechanical and cedar pencils. The Pen & Pencil Gallery, 2011.

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The 2006-2011 World Outlook for Mechanical Pencils. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Mechanical Pencils. ICON Group International, Inc., 2006.

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Parker, Philip M. The 2007-2012 Outlook for Mechanical Pencils in Japan. ICON Group International, Inc., 2006.

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Book chapters on the topic "Mechanical pencils"

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Jean, Stéphanie. "A System to Assess Students’ Competence That Re-uses a Pencil and Paper Tool." In CISM International Centre for Mechanical Sciences. Springer Vienna, 1999. http://dx.doi.org/10.1007/978-3-7091-2490-1_42.

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Johnson, Mina C., David Birchfield, and Colleen Megowan-Romanowicz. "If the Gear Fits, Spin It Again!" In Exploring the Cognitive, Social, Cultural, and Psychological Aspects of Gaming and Simulations. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7461-3.ch005.

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To understand how students learn while engaged in active and embodied science games, two gears games were created. Would students' gear switching skills during the game be correlated with pre- and post-knowledge tests? Twenty-three seventh graders, playing as dyads, used gestures to manipulate virtual gears in the games. The Microsoft Kinect sensor tracked arm-spinning movements. Paper and pencil gear knowledge tests were administered before and after. In Game 1 (the easier one), the in-game switching data was significantly negatively correlated with only pretest gear knowledge. In Game 2 (the harder one), switching was negatively associated with both pre- and posttests. Negative correlations mean that fewer switches were used and that demonstrated better knowledge of mechanical advantage. In-game process data can provide a window onto learner's knowledge. However, the games need to have appropriate sensitivity and map to the learner's ZPD. In ludo (or in-process) data from videogames with high sensitivity may attenuate the need for repetitive traditional knowledge tests.
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Conference papers on the topic "Mechanical pencils"

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Xia, Zhi-Liang, and Qi-Ming Tian. "The Visualized Application of Computer Graphic Stills in the Packaging of Pencils." In 2015 3rd International Conference on Mechanical Engineering and Intelligent Systems. Atlantis Press, 2015. http://dx.doi.org/10.2991/icmeis-15.2015.90.

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Torres-Montoya, S., Y. Montoya-Goez, and L. Tapias. "Comparing different mechanical models for the evaluation of mechanical behavior of reuse in PVC electrosurgical pencils through their hardness and Young's Modulus relation." In 2014 Pan American Health Care Exchanges (PAHCE). IEEE, 2014. http://dx.doi.org/10.1109/pahce.2014.6849634.

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Stein, Matthew. "Numerical Simulation as in Integral Component of Dynamics Problem Solving." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37472.

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The engineering faculty at Roger Williams University are committed to training students to use modern computer-based tools when performing engineering analysis. But achieving this is a tall order, as engineering courses are already jam-packed with essential technical material and any hindrance to delivering this material is unwelcome. Likewise, we routinely pay lip service to the necessity for students to double-check their work, yet we provide students with few tools for systematically accomplishing this. This paper describes an effort by the author to integrate solid modeling into a Dynamics course by requiring numerical validation of symbolic solutions to homework problems. The students solve traditional homework problems using free-body diagrams, equations of motion, pencils and calculators; but then must demonstrate that their answers are valid through an independent check. Students construct solid models in SolidWorks© to duplicate the geometric and inertial properties of the problem, and then use the Motion Analysis, a SolidWorks Simulation add-in, to create a motion study duplicating the conditions of the problem. Students may place dynamically updating dimensions to determine distances or may generate graphs, e.g. velocity versus time, to study motion characteristics. As a direct result, students are able to independently validate their symbolic solutions with numerical simulations. This paper will provide a detailed description of the use of SolidWorks in a sophomore level Dynamics course offered spring 2012 and spring 2013. This paper will present examples of student work and assess the benefits and challenges associated with this teaching method.
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Zhu, Weihang, and Yuan-Shih Lee. "Haptic Sculpting and 5-Axis Pencil-Cut Planning in Virtual Prototyping and Manufacturing." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42489.

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In this paper, a Two-phase approach to tool collision detection and local gouging elimination is proposed for haptic pencil-cut of sculptured surfaces. Pencil-cut is a special kind of machining operation, whose purpose is to use relatively smaller tools to remove rest material on the corners or highly curved regions that are inaccessible by bigger tools. Tool orientation determination and tool collision avoidance are critical issues for 5-axis pencil-cut tool path planning. Detailed techniques of haptic rendering and tool interference avoidance are discussed for haptic-aided 5-axis pencil-cut tool path generation. Hardware and software implementation of the haptic pencil-cut system with practical examples are also presented in this paper.
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Endo, Toshihiro, Toshiharu Higuchi, Yoichi Yamada, and Masahiro Sasaki. "Field emission from mechanical pencil lead and graphite edges." In 2012 IEEE Ninth International Vacuum Electron Sources Conference (IVESC). IEEE, 2012. http://dx.doi.org/10.1109/ivesc.2012.6264185.

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Sasaki, Masahiro. "Field emission from mechanical pencil lead and related materials." In 2014 Tenth International Vacuum Electron Sources Conference (IVESC). IEEE, 2014. http://dx.doi.org/10.1109/ivesc.2014.6892071.

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Sasaki, Masahiro, Toshihiro Endo, Toshiharu Higuchi, and Yoichi Yamada. "On the mechanism of field emission from mechanical pencil lead." In 2012 25th International Vacuum Nanoelectronics Conference (IVNC). IEEE, 2012. http://dx.doi.org/10.1109/ivnc.2012.6316887.

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Xia, Zhi-Liang, and Qi-Ming Tian. "Design and Application of Humanized Pencil Sharpener." In 2015 3rd International Conference on Mechanical Engineering and Intelligent Systems. Atlantis Press, 2015. http://dx.doi.org/10.2991/icmeis-15.2015.91.

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Mahaney, Jack. "A Drafting Course for Practicing Engineers." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61131.

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Graphical communication has traditionally been a basic part of the mechanical engineer’s education. The production and reading of drawings have long been considered an attribute of ‘literate’ engineers. Today, that assumption is under attack, as is the very definition of a drafting course. Typical questions include “Why should we teach pencil/paper drawing in an AutoCAD age?” “Why not just teach solids modeling and forget the old-fashioned stuff?” At Mercer University we teach in the sophomore year a single two-semester-hour laboratory course containing three modules: pencil-and-paper drawing, computer-aided drawing, and solids modeling. The course attempts to balance the presentation and mastery of traditional descriptive geometry principles and skills with the need to prepare engineers for practice. The goal in each module is to teach enough skill to provide a base for experience and future learning in both course work and professional practice. The approach in each module is to start with the basic skills of that particular method, and progress to the production of working and assembly drawings. Rationale and learning objectives for the course are presented, as well as representative examples of assignments and projects.
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Kjeang, Erik, Ned Djilali, and David Sinton. "Planar and Three-Dimensional Microfluidic Fuel Cell Architectures." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42524.

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We propose planar and three-dimensional microfluidic fuel cell architectures based on the all-vanadium redox system. These fuel cells operate in a membraneless co-laminar flow configuration and are manufactured by economical microfabrication methods. Graphite rods, also known as mechanical pencil refills, are demonstrated as fuel cell electrodes in a three-dimensional array architecture with unique scale-up capabilities. We also demonstrate unprecedented power density levels by incorporation of porous electrodes in a planar microfluidic fuel cell.
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