Mostrando recursos 1 - 20 de 680

  1. Temperature distribution measurements in an optically accessible single-cylinder engine using phosphor thermometry

    Jin, Seong-Ho
    Combustion is the most important process in engine operation; the development of engine technology, therefore, relies upon the advancement of combustion technology. Homogeneous charge compression ignition (HCCI), low temperature combustion (LTC) and controlled auto ignition (CAI) have the potential to allow for better fuel economy and reduced emissions in comparison with spark ignition (SI) combustion. Transient temperature distribution is crucial for understanding combustion, especially heat and mass transfer as well as the chemical reactions of combustion. The authors attempt to measure 2D gas temperature distribution using phosphor thermometry techniques in a single-cylinder optical engine. The intensity ratio method from phosphorescence...

  2. Encountering winter in summer

    Bracey, Andrew
    A presentation of a piece of writing delivered as a spoken text in a symposium of Practice, which was seen alongside a video work in an accompanying exhibition. In August 2016 I visited Vienna to spend time with and pay attention to Bruegel's masterpiece, 'Hunters in the Snow' in the Kunsthistorisches Museum. This was a painting I felt huge attachment to, but had never seen in person. I wanted to see what could be unpacked from looking hard, in person, which is unattainable or unknowable from looking at reproductions or from reading about the work. Meeting a ‘hero’ of mine was not in this case...

  3. Errors of memory, memories of error: slip-roads and pit-stops on the long and winding road

    Pinchbeck, Michael
    The Long and Winding Road began on 17 May 2004 when I embarked on a journey in a graffiti-covered car from Nottingham to Liverpool. The journey lasted until 17 May 2009 when I drove the car into the River Mersey. This paper distils five years of practice and 20 years of loss into 25 minutes. From 2004-2009, I toured a one-to-one performance in a car. Passengers were invited to fasten their seat belts and join me for a travel sweet as I shared the reason for the journey via the rear-view mirror. The narrative of the performance was the journey of...

  4. A Fortunate Man: work-in-progress

    Pinchbeck, Michael; Baynton, Rachel
    To mark the 70th anniversary of the NHS, New Perspectives presents a devised show by Michael Pinchbeck inspired by A Fortunate Man; the 1967 masterpiece by writer John Berger and photographer Jean Mohr. Offering an in-depth study of a country doctor who after years of caring for people took his own life, the book has been widely hailed as one of the most influential texts ever written on the subject of medicine, treatment and care. This production marks the first ever UK adaptation of the book and comes with the blessing from John Berger’s family. Using archive film footage and...

  5. Thermal camera based physiological monitoring with an assistive robot

    Cosar, Serhan; Yan, Zhi; Zhao, Feng; Lambrou, Tryphon; Yue, Shigang; Bellotto, Nicola
    This paper presents a physiological monitoring system for assistive robots using a thermal camera. It is based on the detection of subtle changes in temperature observed on different parts of the face. First, we segment and estimate these face regions on thermal images. Then, by applying Fourier analysis on temperature data, we estimate respiration and heartbeat rate. This physiological monitoring system has been integrated in an assistive robot for elderly people at home, as part of the ENRICHME project. Its performance has been evaluated on a new thermal dataset for physiological monitoring, which is made publicly available for research purposes.

  6. From Q to M

    Tullett, Barrie
    A talk given to the Monday Arts Club at the Usher Galler Lincoln, January 2018

  7. Geometric techniques for trajectory planning and chaos control of a bio-inspired autogenetic capsule robot

    Liu, Pengcheng; Yu, Hongnian; Cang, Shuang
    Biological systems achieve energy efficient and adaptive behaviours through extensive internal and external compliance interactions. Active dynamic compliance are created and enhanced from musculoskeletal system (joint-space) to external environment (task-space) amongst the underactuated motions. The terminology bio-inspiration implies the understanding of fundamental principles underlying the motion behaviours of animals and humans and transfers these principles into the development of robotic systems. For example, during walking, the muscles constantly change their stiffness and damping when the leg is swinging forward and the foot is put on the ground. This idea enables the exploration in robotic systems with flexible elements—viscoelasticity to mimic...

  8. The absence/presence of Jews in Hungarian problem films after 1941

    Gergely, Gabor
    Dr. Kovács István (1941) by prominent nationalist filmmaker Viktor Bánky was one of the more explicitly racist propaganda films of wartime Hungary. It tells the story of a university lecturer who narrowly escapes betraying his peasant values and his race by marrying into a family of ambitious upstarts. Although made after the third of a series of anti-Jewish laws to be passed by Hungary between 1938 and 1941, curiously, the film was based on a novel by Sándor Hunyady, an author of Jewish origin. The source material was given a racist makeover by future children’s author and national treasure István...

  9. Reframing agile organization: do big data analytics capabilities matter?

    Rialti, Riccardo; Marzi, Giacomo; Ciappei, Cristiano; Caputo, Andrea
    The Agile Manifesto has become the mantra for software developers seeking to create innovative software. However, recently, the principles of Agile Manifesto have also emerged as guidelines for organizations continuously seeking to develop and adopt innovations. Hence, the expression Agile Organization arose. Notwithstanding this interest, Agile Organizations' traits still have to be conceptualized. Yet, the role of Big Data Analytics capable information systems has been neglected. In this perspective, the research aims to develop a framework assessing why Big Data analytics capabilities are fundamental for organizations aiming to follow Agile Organization's principles. Implications of the potential role of such information...

  10. Informing heritage policy in an uncertain climate: reflections from Ireland

    Daly, Cathy
    .

  11. Ethical issues in self-funded social care: co-producing knowledge with older people

    Markham, Claire
    The number of older people paying for social care from their own resources has increased considerably. This is because of changes in the way local authorities organise statutory social care and the impact of public funding cuts to social care and the related tightening of eligbility criteria for publically funded social care. Despite the increase in numbers of older people who self-fund, very little is known about their experiences and their voices are largely absent in policy and practice debates. Our project focuses on the experiences of older people who are self-funding their care in three research sites: Brighton and...

  12. Regulatory barriers of internationalisation for the SMEs: an emerging market context

    Akter, Mansura; Rahman, Mahfuzur; Radicic, Dragana
    Purpose -The purpose of this paper is to identify, categorise and compare regulatory barriers of internationalisation for the SMEs from an emerging market context. Design/methodology/approach -Using primary data from a questionnaire survey, this paper has developed and validated a partial least square-based structural model to assess the key regulatory barriers of internationalisation with particular attention to the SMEs in Bangladesh. Findings -The results indicate that both administrative and economic regulatory barriers are significant for the internationalisation of SMEs where administrative regulatory barriers are slightly more substantial in Bangladesh. Originality/value –Internationalisation of SMEs has received increasing attention over recent decades, but the association between...

  13. Learning coupled forward-inverse models with combined prediction errors

    Koert, D.; Maeda, G.; Neumann, G.; Peters, J.
    Challenging tasks in unstructured environments require robots to learn complex models. Given a large amount of information, learning multiple simple models can offer an efficient alternative to a monolithic complex network. Training multiple models—that is, learning their parameters and their responsibilities—has been shown to be prohibitively hard as optimization is prone to local minima. To efficiently learn multiple models for different contexts, we thus develop a new algorithm based on expectation maximization (EM). In contrast to comparable concepts, this algorithm trains multiple modules of paired forward-inverse models by using the prediction errors of both forward and inverse models simultaneously. In...

  14. Modelling, dynamic analysis and control of capsubot systems with stable propulsion for medical and recovery assistances

    Liu, Pengcheng; Yu, Hongnian; Cang, Shuang
    The growth of medical robots since the mid-1980s has been striking. From a few initial efforts in stereotactic brain surgery, orthopaedics, endoscopic surgery, microsurgery, and other areas, the field has expanded to include commercially marketed, clinically deployed systems, and a robust and exponentially expanding research community. Obscure gastrointestinal (GI) bleeding, Crohn disease, Celiac disease, small bower tumors, and other disorders that occur in the GI tract have always been challenging to be diagnosed and treated due to the inevitable difficulty in accessing such a complex environment within the human body. Robot-assisted minimally invasive surgery has become an choice.

  15. Towards real-time robotic motion planning for grasping in cluttered and uncertain environments

    Liu, Pengcheng; Elgeneidy, Khaled; Pearson, Simon; Huda, Nazmul; Neumann, Gerhard
    Adaptation to unorganized, congested and uncertain environment is a desirable capability but challenging task in development of robotic motion planning algorithms for object grasping. We have to make a tradeoff between coping with the environmental complexities using computational expensive approaches, and enforcing practical manipulation and grasping in real-time. In this paper, we present a brief overview and research objectives towards real-time motion planning for grasping in cluttered and uncertain environments. We present feasible ways in approaching this goal, in which key challenges and plausible solutions are discussed.

  16. Sample and feedback efficient hierarchical reinforcement learning from human preferences

    Pinsler, R.; Akrour, R.; Osa, T.; Peters, J.; Neumann, G.
    While reinforcement learning has led to promising results in robotics, defining an informative reward function can sometimes prove to be challenging. Prior work considered including the human in the loop to jointly learn the reward function and the optimal policy. Generating samples from a physical robot and requesting human feedback are both taxing efforts for which efficiency is critical. In contrast to prior work, in this paper we propose to learn reward functions from both the robot and the human perspectives in order to improve on both efficiency metrics. On one side, learning a reward function from the human perspective...

  17. Protein conjugation to nanoparticles by designer affinity tags

    Ma, W.; Aboagye-Mensah, D.; Soloviev, M.; Davletov, B.; Ferrari, E.
    For the purpose of proteins bio-conjugation to Gold Nano-Particles (GNPs), we designed and synthesized a polypeptide named NanoLock, derived from SNARE (Soluble NSF Attachment protein REceptor) proteins and able to form a remarkably stable complex with the SNARE protein SNAP25 (Synaptosome Associated Protein of 25 kDa). We also characterized the adsorption of a SNAP25 recombinant fusion to Glutathione S-Transferases (GST) named GST-SNAP25 onto GNPs and found that it forms a stable protein corona surrounding GNPs. Using GST-SNAP25 as an intermediate protein, passively adsorbed on GNPs, we were able to stably bind NanoLock to GNPs. By fusing an arbitrary protein of interest...

  18. The public house in the rural community: public engagement

    Markham, Claire
    Conference poster showing the main findings and public engagement activities on research looking at the rural pubs

  19. Robust learning of object assembly tasks with an invariant representation of robot swarms

    Gebhardt, G. H. W.; Daun, K.; Schnaubelt, M.; Neumann, G.
    — Swarm robotics investigates how a large population of robots with simple actuation and limited sensors can collectively solve complex tasks. One particular interesting application with robot swarms is autonomous object assembly. Such tasks have been solved successfully with robot swarms that are controlled by a human operator using a light source. In this paper, we present a method to solve such assembly tasks autonomously based on policy search methods. We split the assembly process in two subtasks: generating a high-level assembly plan and learning a low-level object movement policy. The assembly policy plans the trajectories for each object and...

  20. Learning robust policies for object manipulation with robot swarms

    Gebhardt, G. H. W.; Daun, K.; Schnaubelt, M.; Neumann, G.
    Swarm robotics investigates how a large population of robots with simple actuation and limited sensors can collectively solve complex tasks. One particular interesting application with robot swarms is autonomous object assembly. Such tasks have been solved successfully with robot swarms that are controlled by a human operator using a light source. In this paper, we present a method to solve such assembly tasks autonomously based on policy search methods. We split the assembly process in two subtasks: generating a high-level assembly plan and learning a low-level object movement policy. The assembly policy plans the trajectories for each object and the object movement...

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