Design principles for six degrees-of-freedom MEMS-based precision manipulators

In the future, the precision manipulation of small objects will become more and more important for appliances such as data storage, micro assembly, sample manipulation in microscopes, cell manipulation, and manipulation of beam paths by micro mirrors. At the same time, there is a drive towards miniaturized systems.\ud Therefore, Micro ElectroMechanical Systems (MEMS), a fabrication technique enabling micron sized features, has been researched for precision manipulation. MEMS devices comprise micro sensors, actuators, mechanisms, optics and fluidic systems. They have the ability to integrate several functions in a small package. MEMS can be commercially attractive by providing cost reduction or enabling new functionality with respect to macro systems. Combining design principles, a mature design philosophy for creating precision machines, and MEMS fabrication, a\ud technology for miniaturization, could lead to micro systems with deterministic behavior and accurate positioning capability. However, in MEMS design trade-offs\ud need to be made between fabrication complexity and design principle requirements.\ud Therefore, the goal of this research has been twofold:\ud 1. Design and manufacture a 6 Degrees-of-Freedom (DOFs) MEMS-based manipulator with nanometer resolution positioning.\ud 2. Derive principle solutions for the synthesis of exact kinematic constraint design and MEMS fabrication technology for multi DOFs precision manipulation in the\ud micro domain

HILT : a terminology mapping service with a DDC spine

The role of DDC in the ongoing HILT (High-level Thesaurus) project is discussed. A phased initiative, funded by JISC in the UK, HILT addresses an issue of likely interest to anyone serving users wishing to cross-search or cross-browse groups of networked information services, whether at regional, national or international level - the problem of subject-based retrieval from multiple sources using different subject schemes for resource description. Although all three phases of HILT to date are covered, the primary concern is with the subject interoperability solution piloted in phase II, and with the use of DDC as a spine in that approach

6-DoFs MEMS-based precision manipulators

Combining Design Principles, a mature design philosophy for creating precision machines, and MEMS fabrication, a technology for miniaturization, could lead to micro systems with deterministic behavior and accurate positioning capability. However, in MEMS design tradeoffs need to be made between fabrication complexity and design principle requirements. Here a micro-mechatronic design of a Stewart Platform, a six Degrees-of-Freedom MEMSbased Precision Manipulator, is presented

Mechatronic design of the Twente humanoid head

This paper describes the mechatronic design of the Twente humanoid head, which has been realized in the purpose of having a research platform for human-machine interaction. The design features a fast, four degree of freedom neck, with long range of motion, and a vision system with three degrees of freedom, mimicking the eyes. To achieve fast target tracking, two degrees of freedom in the neck are combined in a differential drive, resulting in a low moving mass and the possibility to use powerful actuators. The performance of the neck has been optimized by minimizing backlash in the mechanisms, and using gravity compensation. The vision system is based on a saliency algorithm that uses the camera images to determine where the humanoid head should look at, i.e. the focus of attention computed according to biological studies. The motion control algorithm receives, as input, the output of the vision algorithm and controls the humanoid head to focus on and follow the target point. The control architecture exploits the redundancy of the system to show human-like motions while looking at a target. The head has a translucent plastic cover, onto which an internal LED system projects the mouth and the eyebrows, realizing human-like facial expressions

From the Ouachitonian : Meghann Bledsone

Meghann Bledsoe was one of many people in America who grew up bilingual. Her second language is not spoken, though. Bledsoe grew up fluent in American Sign Language

SYNTHESIS AND ANALYSIS OF COPPER PROTEINATE AND MANGANESE PROTEINATE FROM REACTION OF COPPER SULFATE AND MANGANESE SULFATE WITH PROTEIN EXTRACTED FROM FISH WASTE

Objective: Copper and manganese are essential minerals needed for various biological processes in small amounts. However, essential mineralsare poorly absorbed in the form of salts or free form, leading to their low bioavailability. Forming complexes of essential minerals with protein canincrease their bioavailability. Metal proteinate complexes are non-polar, thereby reducing their excretion from the body. Fish waste is quite abundantin Indonesia, and therefore, we used fish waste to synthesize metal-proteinate complexes.Methods: Protein was extracted from fish waste using pancreatin. The extracted protein was mixed with copper or manganese in various ratios. Themetal content in the complexes was analyzed using atomic absorption spectrophotometry; ion exchange chromatography was used for separating thecomplexes from free unbound metals.Results: The optimum condition which yielded the highest protein content was the ratio of pancreatin enzyme to fish waste powder of 2:100. Theoptimum concentration of pancreatin was found to be 2% of the substrate. The yield of copper-proteinate complexes ranged from 97.87% to 98.55%,whereas the yield of manganese proteinate ranged from 97.05% to 98.36%. The free metal content was only found in the manganese proteinatecomplex in the 1.2:1 ratio, which was determined to be 0.0198 mg/g.Conclusion: We demonstrated that copper and manganese can react with proteins extracted by enzymatic hydrolysis of fish waste

Finanas : Análisis d ela planeación financiera a corto plazo en la empresa electrodomésticos Dimag,S.A. para el periodo comprendido entre 2014-2015 y su importancia en la toma de desiciones.

El presente seminario de Graduación tuvo como objetivo principal desarrollar el proceso de planeación financiera a corto plazo realizado en la empresa Electrodomésticos DIMAG, S.A, para el periodo comprendido entre 2014-2015; esta es una empresa dedicada a comercializar electrodomésticos de línea blanca. La metodología que se utilizó en esta tesis fueron investigaciones bibliográficas ya que se utilizó libros y páginas web para desarrollar el tema antes expuesto. Para poder desarrollar el proceso de planeación primero se realizó el diagnóstico financiero de la entidad en los años 2013 y 2014, para establecer la situación inicial de la misma, luego se realizó la proyección de los presupuestos, Flujo de caja y finalmente los estados Financieros Presupuestados y en base a esta información se establecen diferentes estrategias y decisiones financieras que debería adoptar la empresa para alcanzar los estándares óptimos y promover su crecimiento y fortalecimiento en el mercado. Se concluye que para cualquier empresa es de vital importancia contar con un modelo formal de planeación financiera, ya que les permitirá optimizar la utilización de sus recursos y obtener mejores resultados

Analisis Kinerja Supply Chain Management Berbasis Balanced Scorecard Pada PT. Alove Bali Ind

Tujuan penelitian ini adalah untuk mengetahui apakah kinerja supply chain management suatu Perusahaan sudah terlaksana dengan baik dilihat dari keempat perspektif balanced scorecard. Penelitian ini dilakukan di PT. Alove Bali IND. Jumlah sample yang diambil sebanyak 20 karyawan PT. Alove Bali IND serta 5 agen PT. Alove Bali IND, Pengumpulan data dilakukan melalui penyebaran kuesioner dan wawancara. Teknik analisis data yang digunakan menggunakan pendekataan balanced scorecard. Berdasarkan hasil analisis ditemukan bahwa Kinerja PT.Alove Bali IND diukur malalui perspektif keuangan kurang baik dikarenakan masih terjadi fluktuatif di tahun 2012 hingga tahun 2014 dan dalam menjalankan operasionalnya Perusahaan masih sangat tergantung oleh hutang. Pada perspektif pelanggan kinerja Perusahaan sudah terbilang baik dikarenakan nilai rata-rata keselurahan responden adalah sebesar 4.20. Pada perspektif bisnis internal kinerja Perusahaan sudah terbilang sangat baik dikarenakan nilai rata-rata keselurahan responden adalah sebesar 4.78. Pada perspektif Pembelajaran dan pertumbuhan kinerja Perusahaan sudah terbilang sangat baik dikarenakan nilai rata-rata keselurahan responden adalah sebesar 4.61.   Kata kunci: supply chain management, balanced scorecard, manajemen operas

Long-range elastic guidance mechanisms for electrostatic comb-drive actuators

The range of motion and output force of the often used electrostatic comb-drive with folded flexure straight guidance, as shown in Figure 1, is limited by sideways instability due to poor sideways stiffness of the folded flexure at relatively large deflections [1]