Task-Projected Hyperdimensional Computing for Multi-Task Learning

Brain-inspired Hyperdimensional (HD) computing is an emerging technique for cognitive tasks in the field of low-power design. As a fast-learning and energy-efficient computational paradigm, HD computing has shown great success in many real-world applications. However, an HD model incrementally trained on multiple tasks suffers from the negative impacts of catastrophic forgetting. The model forgets the knowledge learned from previous tasks and only focuses on the current one. To the best of our knowledge, no study has been conducted to investigate the feasibility of applying multi-task learning to HD computing. In this paper, we propose Task-Projected Hyperdimensional Computing (TP-HDC) to make the HD model simultaneously support multiple tasks by exploiting the redundant dimensionality in the hyperspace. To mitigate the interferences between different tasks, we project each task into a separate subspace for learning. Compared with the baseline method, our approach efficiently utilizes the unused capacity in the hyperspace and shows a 12.8% improvement in averaged accuracy with negligible memory overhead.Comment: To be published in 16th International Conference on Artificial Intelligence Applications and Innovation

Identities among relations for higher-dimensional rewriting systems

We generalize the notion of identities among relations, well known for presentations of groups, to presentations of n-categories by polygraphs. To each polygraph, we associate a track n-category, generalizing the notion of crossed module for groups, in order to define the natural system of identities among relations. We relate the facts that this natural system is finitely generated and that the polygraph has finite derivation type.Comment: 16 pages, corrected version after review, to appear in S\'eminaires et Congr\`e

Lazy Abstraction-Based Controller Synthesis

We present lazy abstraction-based controller synthesis (ABCS) for continuous-time nonlinear dynamical systems against reach-avoid and safety specifications. State-of-the-art multi-layered ABCS pre-computes multiple finite-state abstractions of varying granularity and applies reactive synthesis to the coarsest abstraction whenever feasible, but adaptively considers finer abstractions when necessary. Lazy ABCS improves this technique by constructing abstractions on demand. Our insight is that the abstract transition relation only needs to be locally computed for a small set of frontier states at the precision currently required by the synthesis algorithm. We show that lazy ABCS can significantly outperform previous multi-layered ABCS algorithms: on standard benchmarks, lazy ABCS is more than 4 times faster

A bremsstrahlung gamma-ray source based on stable ionization injection of electrons into a laser wakefield accelerator

Laser wakefield acceleration permits the generation of ultra-short, high-brightness relativistic electron beams on a millimeter scale. While those features are of interest for many applications, the source remains constraint by the poor stability of the electron injection process. Here we present results on injection and acceleration of electrons in pure nitrogen and argon. We observe stable, continuous ionization-induced injection of electrons into the wakefield for laser powers exceeding a threshold of 7 TW. The beam charge scales approximately linear with the laser energy and is limited by beam loading. For 40 TW laser pulses we measure a maximum charge of almost 1 nC per shot, originating mostly from electrons of less than 10 MeV energy. The relatively low energy, the high charge and its stability make this source well-suited for applications such as non-destructive testing. Hence, we demonstrate the production of energetic radiation via bremsstrahlung conversion at 1 Hz repetition rate. In accordance with Geant4 Monte-Carlo simulations, we measure a gamma-ray source size of less than 100 microns for a 0.5 mm tantalum converter placed at 2 mm from the accelerator exit. Furthermore we present radiographs of image quality indicators

Motivasi Hidup pada Penderita Lupus Dewasa

The purpose of this research is to know about life motivation of lupus sufferer when an individual face difficult periods and comes up from the cobdition which is full limitation after the doctor diagnoses lupus disease. Subject of the research is someone who is attacked by lupus. The range of age is from 25 until 35. This research will be held at subject's house which is in Gombong sub distric, Kebumen district. The methods that are used are observation, interview and the use of triangulation technic to strengthen the result. The result of analyzing data is based on three aspect of motivation, it is concluded that having positive attitude, oriented on achievement of a goal, and streng that motivates an individual becomes one influence that supports life motivation for the subject

Evaluasi Jiwa Kepemimpinan Santri Ditinjau dari Kepemimpinan Kenabian

This study aimed to describe the evaluation of leadership skills of students in terms of the prophetic leadership. in addition, this study aimed to analyzethe problem in evaluating leadership qualities of students.Subjects in this study were active students at boarding school Raudhatul Muttaqien (PPRM) St. Cangkringan KM 14 Babadan Purwomartani Kalasan, Sleman, Yogyakarta academic year 2014/2015. These students attending Madrasah Tsyanawiah and Madrasah Aliyah Raudhatul Muttaqien, aged 12-18 years and active in the organization. This study uses data collection techniques using interviews and observations.Results ofstudies have provided an understanding that the process of learning the prophetic leadership students do not stop at the time at PPRM course, but the processs will continue until the end of life. In general, it is known that the learning process prophetic leadership has been going well, althoughthere areconstraints thatare found but it is not a significant problem.Keynote: Leadership Skills, Students , Prophetic Leadershi

Factorial invariance of the Patient Health Questionnaire and Generalized Anxiety Disorder Questionnaire.

The UK's Improving Access to Psychological Therapies (IAPT) programme uses the Patient Health Questionnaire Depression Scale (PHQ-9; Kroenke, Spitzer, & Williams, , J. Gen. Intern. Med., 16, 606) and Generalized Anxiety Disorder Scale (GAD-7; Spitzer et al., , Arch. Intern. Med., 166, 1092) to assess patients' symptoms of depression and anxiety respectively. Data are typically collected via telephone or face-to-face; however, no study has statistically investigated whether the questionnaires' items operate equivalently across these modes of data collection. This study aimed to address this omission