ZWITTERIONIC ADDITIVES FOR ELECTROCHEMICAL DEVICES

Zwitterionic electrolytes such as N-methyl-N-(n-butanesulfonate) pyrrolidinium are added to electrolyte compositions such as polyelectrolytes, ionic liquid electrolytes and molecular solvent electrolytes (for example, lithium hexafluorophosphate) to improve conductivity of the ion species, such as lithium, in the electrolyte. This has application to lithium based energy storage devices such as batteries and supercapacitors.

A haptic training environment for the heart myoblast cell injection procedure

The heart muscle of a cardiac arrest victim continues to accumulate damage throughout its lifetime. This reduces the heart's ability to pump sufficient oxygen and nutrient blood to meet the body's needs. Medical researchers have shown that direct injection of pre-harvested skeletal myoblast cells into the heart can restore some muscle function [1]. This operative procedure usually necessitates the surgeon to open a patient's chest. The open chest procedure is usually a lengthy process and often extends the recovery time of the patient. Alternatively, a high accuracy surgical aid robotic system can be used to assist the thoracoscopic surgery [2][3]. While the robotic surgical method aids faster patient recovery, a less experienced surgeon can potentially cause damage to surrounding tissue.

This paper presents a study into the development of a virtual haptically-enabled heart myoblast injection simulation environment, which can be used to train new surgeons to get hands on experience with the process. The paper also discusses the development of a generic constraint motion technique for needle insertion. Experiments on human performance measures and efficacy, while interacting with haptic feedback training models, are also presented. The experiment involved 10 operators, with each person repeating the needle insertion and injection 10 times. A notable improvement in the task execution time with the number of repetitions was observed. Operators improved their time by up to 300% compared to their first training attempt for a static heart scenario. Under a dynamic heart motion, operator's performance was slightly lower, with the successful rate of completing the experiment reduced from 84% to 75%.

Haptic microrobotic intracellular injection assistance using virtual fixtures

In manual cell injection the operator relies completely on visual information for task feedback and is subject to extended training times as well as poor success rates and repeatability. From this perspective, enhancing human-in-the-loop intracellular injection through haptic interaction offers significant benefits. This paper outlines two haptic virtual fixtures aiming to assist the human operator while performing cell injection. The first haptic virtual fixture is a parabolic force field designed to assist the operator in guiding the micropipette's tip to a desired penetration point on the cell's surface. The second is a planar virtual fixture which attempts to assist the operator from moving the micropipette's tip beyond the deposition target location inside the cell. Preliminary results demonstrate the operation of the haptically assisted microrobotic cell injection system.

Social cognitive theory and the adoption of e-book devices

The book publishing industry has been revolutionised by the technological innovations created by the Internet. Electronic book (e-book) devices such as Kindle by Amazon, Nook by Barnes and Noble and the iPad by Apple are relatively new technological innovations that will change the way individuals purchase and read books. The purpose of this paper is to examine the factors that will lead to a person adopting an e-book device. In this paper, a social cognitive theoretical framework is utilised to understand an individual’s intention to adopt an e-book device like the Kindle, Nook or iPad. A conceptual model is proposed, which focuses on the antecedents to a person’s adoption behaviour and is empirically tested through a survey of Australian youths. A portion of the conceptual model is supported. This suggests that marketing has an effect on a person’s intention to adopt an e-book device, which is mediated by their entrepreneurial orientation. The conceptual model proposed and tested has implications for the e-book industry as it demonstrates the internal and external environmental factors that influence adoption behaviour. The paper highlights for the book industry the important areas of e-commerce and m-commerce and how technological innovations are influenced by environmental factors. More recently, m-commerce has increased in usage as people can buy an electronic book via their e-book device anywhere in the world. E-book devices are a mobile device that people adopt in different ways depending on environmental factors

E-book devices and m-commerce : what might be the impact on organizational learning?

E-book devices are changing current organizational practices by providing a source of e-learning, in which organizations and their employees can more easily access information about current business developments that impact on their existing practices. E-book devices (also referred to as e-book readers or e-readers) use electronic ink technology to display written words from books, newspapers, magazines and other documentation. They are portable devices that are the size of a paperback book and are a new technology that has only been mass-marketed to the general population in the past year. Most importantly for an organization is that e-books could transform and will certainly influence their current technology practices and how people communicate and perform their job tasks.

Method and apparatus for haptic control

The present invention provides remote interfacing utilising haptic technology. In a first aspect there is provided a haptic grasping interface comprising a plurality of finger interaction points, with actuators connected at one end to an actuator control mechanism. The mechanism is mounted remotely from the grasping interface, inverse to the finger interaction points, for manipulation of these points. The grasping points comprise pulleys which route the actuators through a cable tension and transmission system. A second aspect provides haptic augmentation to an operator, which indicates to the operator the state of a control input to a controlled device. A third aspect provides a means of simulating motion where haptic feedback is provided to a user in correspondence with the movement of the user within a pod environment.

Ethics, entrepreneurship and the adoption of e-book devices

Electronic books (e-books) are rapidly gaining popularity as a technological innovation that will change the way people read books. A social cognitive perspective to understand how a person adopts an e-book device is utilised in this paper to empirically test the results of a survey. A portion of the conceptual model is supported by the results of the survey that demonstrates the importance of an individual's ethics and entrepreneurial orientation to the adoption behaviour they have about e-book devices. This paper highlights for practitioners the importance of focusing on marketing the ethical and innovativeness of e-book devices.

3D particle-based cell modelling for haptic microrobotic cell injection

Introducing haptic interface to conduct microrobotic intracellular injection has many beneficial implications. In particular, the haptic device provides force feedback to the bio-operator's hand. This paper introduces a 3D particle-based model to simulate the deformation of the cell membrane and corresponding cellular forces during microrobotic cell injection. The model is based on the kinematic and dynamic of spring – damper multi particle joints considering visco-elastic fluidic properties. It simulates the indentation force feedback as well as cell visual deformation during the microinjection. The model is verified using experimental data of zebrafish embryo microinjection. The results demonstrate that the developed cell model is capable of estimating zebrafish embryo deformation and force feedback accurately.

A comparative study of supervised learning techniques for data-driven haptic simulation

This paper focuses on the choice of a supervised learning algorithm and possible data preprocessing in the domain of data-driven haptic simulation. This is done through a comparison of the performance of different supervised learning techniques with and without data preprocessing. The simulation of haptic interactions with deformable objects using data-driven methods has emerged as an alternative to parametric methods. The accuracy of the simulation depends on the empirical data and the learning method. Several methods were suggested in the literature and here we provide a comparison between their performance and applicability to this domain. We selected four examples to be compared: singular learning mechanism which is artificial neural networks (ANN), attribute selection followed by ANN learning process, ensemble of multiple learning techniques, and attribute selection followed by the learning ensemble. These methods performance was compared in the domain of simulating multiple interactions with a deformable object with nonlinear material behavior.

Virtual haptic cell model for operator training

Microrobotic cell injection is an area of growing research interest. Typically, operators rely on visual feedback to perceive the microscale environment and are subject to lengthy training times and low success rates. Haptic interaction offers the ability to utilise the operator’s haptic modality and to enhance operator performance. Our earlier work presented a haptically enabled system for assisting the operator with certain aspects of the cell injection task. The system aimed to enhance the operator’s controllability of the micropipette through a logical mapping between the haptic device and microrobot, as well as introducing virtual fixtures for haptic guidance. The system was also designed in such a way that given the availability of appropriate force sensors, haptic display of the cell penetration force is straightforward. This work presents our progress towards a virtual replication of the system, aimed at facilitating offline operator training. It is suggested that operators can use the virtual system to train offline and later transfer their skills to the physical system. In order to achieve the necessary representation of the cell within the virtual system, methods based on a particle-based cell model are utilised. In addition to providing the necessary visual representation, the cell model provides the ability to estimate cell penetration forces and haptically display them to the operator. Two different approaches to achieving the virtual system are discussed.

Emerging technologies : Deakin's experience with mobile devices

Powerpoint presentation presenting an overview of the ebook readers trial based at Deakin University.