Papers – Page 13 – TechConnect Briefs

Investigation of Fidelity of Micro Molded Features Using Microinjection Molding Process

Rajhi A., Almalki A., Coulter J.P., Lehigh University, US

This paper investigates the influence of selected processing parameters of microinjection molding on the replication fidelity of micro molded features. Parameters were altered in order to find to what extent the microfeatures can be stretched [...]

At the frontier of in-space production: Harnessing microgravity for manufacturing

Reeves R.D., Savin K.A., Center for the Advancement of Science in Space, US

Since the dawn of human space exploration, there have been dreams of manufacturing products in space of such quality and novelty that they improve life on Earth. And over the past 50 years, microgravity research [...]

Layered Structures – Innovative Tube/Pipe Manufacturing Process

Ritchie C., McNeil K., Techreo, US

High Performance Tubular Structures (HPTS) is an emerging technology being developed by Techreo in the Cincinnati, Ohio area. HPTS will provide breakthrough performance advantages in a wide range of metal tubular structures, including pipes transporting [...]

A Learning-based Approach to Cover Short-term Camera Failure in a Monocular Visual Inertial Odometry System

Tian Y., Compere M., Embry-Riddle Aeronautical University, US

Localization and navigation have multiple established methods in sensing and fusion algorithm. Previous studies use different sensors such as Global Navigation Satellite System (GNSS) and Global Inertial Navigation System (GINS) using GPS and an inertial [...]

PVA cryogels obtained by biomimetic synthesis of polyaniline using hematin supported on halloysite nanotubes as catalyst

Jiménez-Cárdenas P., De León-Santillán A., Gallardo-Vega C., Centro de Investigación en Química Aplicada, MX

We studied the biomimetic synthesis of polyaniline as an alternate route to prepare electrical conductive cryogels (ECC), unique structures that combine intrinsic conductivity and hydrogel properties. For that purpose, hematin a natural porphyrin with peroxidase-like [...]

Synthesis of polyaniline catalyzed by soybean peroxidase immobilized in halloysite nanotubes

Alvarado-Canché C., López-Martínez J., Romero-García J., Ledezma-Pérez A., De León-Santillán A., Gallardo-Vega C., Centro de Investigación en Química Aplicada, MX

Polyaniline is one of the most extended studied conducting polymer because of its simple synthesis, low cost, high conductivity and excellent environmental stability. Synthesis of this inherently conducting polymer can be carried by several methods, [...]

Robot Axis Control Using a Differential Learning Algorithm

Abegaz B., Loyola University of Chicago, US

The motion control of robotic arms using brushless DC motors has been implemented using various mechanisms, including a model predictive controller (MPC), a fuzzy controller and supervised machine learning methods. In order to provide a [...]

Tension prediction using web moving speed and natural vibration frequency

Du X., Yan J., University of Massachusetts Amherst, US

The characterization of web dynamics is critical for web handling and process control of roll-to-roll (R2R) manufacturing systems. One such critical characterization parameter is the tension in a moving web, which ultimately determines the efficacy [...]

Analysis of Breakdown Voltage of AlGaN/GaN HEMTs with High-k Passivation Layer and High Acceptor Density in Buffer Layer

Ueda S., Tomita R., Kawada Y., Horio K., Shibaura Institute of Technology, JP

AlGaN/GaN HEMTs are now receiving great interest for application to high-power microwave devices and high power switching devices. To improve the breakdown voltage, the introduction of field plate is shown to be effective, but it [...]

Analysis of Breakdown Characteristics in Field-Plate AlGaN/GaN HEMTs: Dependence on Deep-Acceptor Density in Buffer Layer

Akiyama S., Kondo M., Wada L., Horio K., Shibaura Institute of Technology, JP

We make a two-dimensional analysis of field-plate AlGaN/GaN HEMTs with a Fe-doped semi-insulating buffer layer, and studied how the deep-acceptor density in the buffer layer NDA and the field-plate length LFP affect the breakdown voltage [...]