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IEEE/ACM International Conference on Technical Debt (TechDebt)

作者： Areti Ampatzoglou Alexandros Michailidis Christos Sarikyriakidis Apostolos Ampatzoglou Alexander Chatzigeorgiou Paris Avgeriou Department of Applied Informatics University of Macedonia Greece School of Science and Technology International Hellenic University Thessaloniki Greece Department of Informatics and Telecommunications Engineering University of Western Macedonia Kozani Greece Department of Mathematics and Computer Science University of Groningen Netherlands

Technical debt management entails the quantification of principal and interest. In our previous work we had introduced a framework for calculating the Technical Debt Breaking Point (TD-BP), which is a point in time where the accumulated interest becomes larger than the principal; thus the debt of the company is no longer sustainable after this point in time. In this paper, we instantiate this framework and validate its ability to assess the breaking point of source code modules in an industrial setting. The results of the validation suggest that the calculated TD-BP is strongly correlated to experts' opinion on the sustainability of modules, and that it can accurately rank components, based on their maintenance difficulty.

关键词： Software Maintenance engineering Time division multiplexing Estimation Economic indicators Indexes

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3D Microstructures: Transparent, Compliant 3D Mesostructures for Precise Evaluation of Mechanical Characteristics of Organoids (Adv. Mater. 25/2021)

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Advanced Materials 2021年第25期33卷

作者： Hanjun Ryu Yoonseok Park Haiwen Luan Gokhan Dalgin Kira Jeffris Hong-Joon Yoon Ted S. Chung Jong Uk Kim Sung Soo Kwak Geumbee Lee Hyoyoung Jeong Jihye Kim Wubin Bai Joohee Kim Yei Hwan Jung Andrew K. Tryba Joseph W. Song Yonggang Huang Louis H. Philipson John D. Finan John A. Rogers Querrey Simpson Institute for Bioelectronics Northwestern University Evanston IL 60208 USA School of Advanced Materials Science and Engineering Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Section of Adult and Pediatric Endocrinology Diabetes and Metabolism Kovler Diabetes Center The University of Chicago Chicago IL 60637 USA Department of Mechanical and Industrial Engineering University of Illinois at Chicago Chicago IL 60607 USA Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA School of Chemical Engineering Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Department of Applied Physical Sciences University of North Carolina at Chapel Hill Chapel Hill NC 27599 USA Department of Electronic Engineering Hanyang University Seoul 04763 Republic of Korea Section of Pediatric Neurology Department of Pediatrics The University of Chicago Chicago IL 60637 USA Center for Bio-Integrated Electronics Northwestern University Evanston IL 60208 USA Department of Mechanical Engineering Northwestern University Evanston IL 60208 USA Department of Civil and Environmental Engineering Northwestern University Evanston IL 60208 USA Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA Department of Medicine and Kovler Diabetes Center The University of Chicago Chicago IL 60637 USA Department of Chemistry Northwestern University Evanston IL 60208 USA Department of Electrical and Computer Engineering Northwestern University Evanston IL 60208 USA Departments of Neurological Surgery Feinberg School of Medicine Northwestern University Chicago IL 60611 USA

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Radiation Hardening by Design of a Novel Double-Node-Upset-Tolerant Latch Combined with Layout Technique

Radiation Hardening by Design of a Novel Double-Node-Upset-T...

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International Test Conference in Asia (ITC-Asia)

作者： Aibin Yan Zhile Chen Zhengfeng Huang Xiangsheng Fang Maoxiang Yi Jing Guo School of Computer Science and Technology Anhui University Hefei China School of Electronic Science & Applied Physics Hefei University of Technology Hefei China Department of Information Engineering Anhui Institute of Economic Management Hefei China Key Laboratory of Instrumentation Science and Dynamic Measurement North University of China Taiyuan China

ISBN: (纸本)9781538651810

This paper presents a novel double-node upset (DNU) tolerant latch through radiation-hardening-by-design combined with layout technique. The latch mainly comprises 6 interlocked cross-coupled input-split inverters. Due to the special feedback rules for the internal nodes, many interlocked feedback loops are constructed in the latch and the following robustness is achieved: 1) In the case of 0 being held, the latch can self-recover from any single node upset (SNU), any DNU including double-adjacent-node upset (DANU) and double-separated-node upset (DSNU); 2) In the case of 1 being held, the latch can self-recover from any SNU, any DANU and partial DSNU. However, using layout technique, as for any DSNU-sensitive node-pair, the nodes are separated, thus the latch can avoid any DSNU. Simulation results demonstrate the robustness of the proposed latch. Besides, compared with typical existing DNU hardened latch designs, the proposed latch approximately saves 80.25% area-power-delay product on average.

关键词： Latches Layout Radiation hardening (electronics) Robustness Inverters Simulation

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A Unique Backoff Algorithm in IEEE 802.15.6 WBAN

A Unique Backoff Algorithm in IEEE 802.15.6 WBAN

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IEEE Vehicular Technology Conference

作者： Abdul Saboor Rizwan Ahmad Waqas Ahmed Muhammad Mahtab Alam National University of Sciences and Technology (NUST) School of Electrical Engineering and Computer Science Islamabad Pakistan Pakistan Institute of Engineering and Applied Sciences (PIEAS) Islamabad Pakistan Tallinn University of Technology Thomas Johann Seebeck Department of Electronics Tallinn Estonia

ISBN: (纸本)9781538663592;9781538663585

A new backoff scheme named Unique Backoff Algorithm (UBA) has been introduced in this paper for IEEE 802.15.6 Wireless Body Area Networks (WBANs). This scheme tries to eliminate the collision among nodes by assigning unique backoff values. UBA removes the large delays during transmissions between different nodes and hence increases overall system performance. Furthermore, the concept of Backup Slot (BS) has also been introduced in the superframe to accommodate one failure of highest priority in the current superframe. For evaluation, proposed scheme has been simulated in comparison with the Binary Exponential Backoff (BEB) using different priorities. Results show that our scheme outperforms BEB in terms of throughput and superframe efficiency.

关键词： body area networks failure analysis telecommunication network reliability body area networks telecommunication network reliability FAILURE ANALYSIS backoff superframe INSTITUTE OF ELECTRICAL AND ELECTRONIC ENGINEERS

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Uncertainty Analysis of Near-Field Thermal Energy Transfer within Nanoparticle Packing

Uncertainty Analysis of Near-Field Thermal Energy Transfer w...

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Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITHERM)

作者： Anil Yuksel Edward T. Yu Michael Cullinan Jayathi Murthy Department of Mechanical Engineering The University of Texas at Austin Austin TX USA Department of Electrical and Computer Engineering The University of Texas at Austin Austin TX USA Henry Samueli School of Engineering and Applied Science University of California Los Angeles Los Angeles CA USA

Laser heating of nanoparticles leads to significant near-field thermal effects between the nanoparticles. Due to the interaction between the laser and nanoparticle packings, some laser energy is scattered or absorbed, resulting in attenuation of the laser energy. The absorbed energy within the nanoparticles affects the near-field thermal energy transport. We have analyzed these effects by combining experimental determination of nanoparticle ink morphology with computational electromagnetic simulations. Scanning electron micrographs (SEM) of a representative copper nanoparticle ink show that the nanoparticles are distributed log-normally in size with 116 nm mean radius and 48 nm standard deviation. Hence, four instances of log-normally distributed copper nanoparticle packings which have 116 nm mean radius with 48 nm standard deviations are created by using a Discrete Element Model (DEM) in which a specified number of particles is generated, specifying a position and radius. Each nanoparticle is randomly generated with an initial velocity and a boundary under gravitational forces, which create the nanoparticle packing. Maxwell's equations in the frequency domain are simulated for these nanoparticle packings to understand the uncertainty analysis of near-field thermal energy within the nanoparticles by calculating the absorption, scattering and extinction coefficients. We show that nanoparticle distribution under gravitational forces doesn't significantly affect the absorption cross-section for both TE and TM polarization. Moreover, numerical and experimental results agree well between 400 nm to 800 nm wavelength of laser irradiation for generated different four particle distributions.

关键词： Absorption Nanoparticles Scattering Copper Skin Uncertainty Lighting

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Current-induced skyrmion dynamics in a frustrated magnetic film.

Current-induced skyrmion dynamics in a frustrated magnetic f...

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International Conference on Magnetics (INTERMAG)

作者： X. Zhang J. Xia Y. Zhou X. Liu H. Zhang M. Ezawa School of Science and Engineering The Chinese University of Hong Kong Shenzhen Shenzhen China Department of Electrical and Computer Engineering Shinshu University Nagano Japan College of Opto-electronic Engineering Shenzhen University Shenzhen China Department of Applied Physics The University of Tokyo Tokyo Japan

Summary form only given. The magnetic skyrmion is an exotic and versatile topological object in condensed matter physics, which promises novel applications in electronic and spintronic devices [1-2]. Recently, a rich phase diagram of an anisotropic frustrated magnet and properties of frustrated skyrmions with arbitrary vorticity and helicity were investigated [3]. Other remarkable physical properties of skyrmions in the frustrated magnetic system have also been studied theoretically [4-6]. Here, we explore the skyrmion dynamics in a frustrated magnet based on the J 1 -J 2 -J 3 classical Heisenberg model explicitly by including the dipole-dipole interaction [7]. The skyrmion energy acquires a helicity dependence due to the dipole-dipole interaction, resulting in the current-induced translational motion with a fixed helicity. The lowest-energy states are the degenerate Bloch-type states, which can be used for building the binary memory. By increasing the driving current, the helicity locking-unlocking transition occurs, where the translational motion changes to the rotational motion. Furthermore, we demonstrate that two skyrmions can spontaneously form a bound state. The separation of the bound state forced by a driving current is also studied. In addition, we show the annihilation of a pair of skyrmion and antiskyrmion. Our results reveal the distinctive frustrated skyrmions may enable new applications.

关键词： Handheld computers Magnetics Conferences Maximum likelihood estimation

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Fast and automatic periacetabular osteotomy fragment pose estimation using intraoperatively implanted fiducials and single-view fluoroscopy

arXiv

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arXiv 2019年

作者： Grupp, Robert B. Murphy, Ryan J. Hegeman, Rachel A. Alexander, Clayton P. Unberath, Mathias Otake, Yoshito McArthur, Benjamin A. Armand, Mehran Taylor, Russell H. Department of Computer Science Johns Hopkins University BaltimoreMD United States Auris Health Inc. Redwood CityCA United States Research and Exploratory Development Department Johns Hopkins University Applied Physics Laboratory LaurelMD United States Department of Orthopaedic Surgery Johns Hopkins Medicine BaltimoreMD United States Graduate School of Information Science Nara Institute of Science and Technology Ikoma Nara Japan Department of Surgery and Perioperative Care Dell Medical School University of Texas AustinTX United States Texas Orthopedics AustinTX United States Department of Mechanical Engineering Johns Hopkins University BaltimoreMD United States

Accurate and consistent mental interpretation of fluoroscopy to determine the position and orientation of acetabular bone fragments in 3D space is difficult. We propose a computer assisted approach that uses a single fluoroscopic view and quickly reports the pose of an acetabular fragment without any user input or initialization. Intraoperatively, but prior to any osteotomies, two constellations of metallic ball-bearings (BBs) are injected into the wing of a patient's ilium and lateral superior pubic ramus. One constellation is located on the expected acetabular fragment, and the other is located on the remaining, larger, pelvis fragment. The 3D locations of each BB are reconstructed using three fluoroscopic views and 2D/3D registrations to a preoperative CT scan of the pelvis. The relative pose of the fragment is established by estimating the movement of the two BB constellations using a single fluoroscopic view taken after osteotomy and fragment relocation. BB detection and inter-view correspondences are automatically computed throughout the processing pipeline. The proposed method was evaluated on a multitude of fluoroscopic images collected from six cadaveric surgeries performed bilaterally on three specimens. Mean fragment rotation error was 2.4 ± 1.0 degrees, mean translation error was 2.1 ± 0.6 mm, and mean 3D lateral center edge angle error was 1.0 ± 0.5 degrees. The average runtime of the single-view pose estimation was 0.7 ±0.2 seconds. The proposed method demonstrates accuracy similar to other state of the art systems which require optical tracking systems or multiple-view 2D/3D registrations with manual input. The errors reported on fragment poses and lateral center edge angles are within the margins required for accurate intraoperative evaluation of femoral head coverage. Copyright © 2019, The Authors. All rights reserved.

关键词： Errors

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3D shape retrieval basing on representatives of classes

arXiv

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arXiv 2018年

作者： Benjelloun, M. Dadi, E.W. Daoudi, E.M. National School of Applied Sciences LaRi Laboratory University of Mohammed First Morocco Department of Computer Science Faculty of Engineering University of Mons Belgium Faculty of Sciences LaRi Laboratory University of Mohammed First Morocco

In this paper, we present an improvement of our proposed technique for 3D shape retrieval in classified databases [2] which is based on representatives of classes. Instead of systematically matching the object-query with all 3D models of the database, our idea presented in [2] consist, for a classified database, to represent each class by one representative that is used to orient the retrieval process to the right class (the class excepted to contain 3D models similar to the query). In order to increase the chance to fall in the right class, our idea in this work is to represent each class by more than one representative. In this case, instead of using only one representative to decide which is the right class we use a set of representatives this will contribute certainly to improving the relevance of retrieval results. The obtained experimental results show that the relevance is significantly improved. Copyright © 2018, The Authors. All rights reserved.

关键词： Database systems

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Optimal low-latency network topologies for cluster performance enhancement

arXiv

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arXiv 2019年

作者： Deng, Yuefan Guo, Meng Ramos, Alexandre F. Huang, Xiaolong Xu, Zhipeng Liu, Weifeng Department of Applied Mathematics and Statistics Stony Brook University Stony BrookNY11794 United States Jinan Shandong250101 China Jinan Shandong250101 China Instituto do Câncer do Estado de São Paulo Faculdade de Medicina Universidade de São Paulo Avenida Arlindo Béttio 1000 São PauloCEP 03828-000 Brazil School of Data and Computer Science Sun Yat-sen University Guangzhou Guangdong510006 China School of Information Science and Engineering University of Jinan Jinan Shandong250022 China

We propose that clusters interconnected with network topologies having minimal mean path length will increase their overall performance for a variety of applications. We approach our heuristic by constructing clusters of up to 36 nodes having Dragonfly, torus, ring, Chvatal, Wagner, Bidiakis and several other topologies with minimal mean path lengths and by simulating the performance of 256-node clusters with the same network topologies. The optimal (or sub-optimal) low-latency network topologies are found by minimizing the mean path length of regular graphs. The selected topologies are benchmarked using pingpong messaging, the MPI collective communications, and the standard parallel applications including effective bandwidth, FFTE, Graph 500 and NAS parallel benchmarks. We established strong correlations between the clusters' performances and the network topologies, especially the mean path lengths, for a wide range of applications. In communication-intensive benchmarks, clusters with optimal network topologies out-perform those with mainstream topologies by several folds. It is striking that a mere adjustment of the network topology suffices to reclaim performance from the same computing hardware. Copyright © 2019, The Authors. All rights reserved.

关键词： Graph theory

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Analysis of Audio Features for Music Representation

Analysis of Audio Features for Music Representation

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International Conference on Reliability, Infocom Technologies and Optimization (ICRITO) (Trends and Future Directions)

作者： Rhythm Bhatia Saumya Srivastava Vandan Bhatia Manpreet Singh School of Computing and Electrical Engineering Indian Institute of Technology Mandi Mandi India Apaji Institute of Mathematics & Applied Computer Technology Banasthali Vidyapith Jaipur Jaipur India Department of Computer Science and Engineering Bangalore Institute of Technology Bangalore India Department of Industrial and Management Engineering Indian Institute of Technology Kanpur Kanpur India

ISBN: (纸本)9781538646939

In this paper we have evaluated the ability and importance of audio feature sets. We have used six general audio classes which includes some speech data, instrumental data and general music of different genres. The feature sets include low-level signal properties, Mel-frequency cepstral coefficients, group delay (phase based information), Chromaprint (bit level based features), audio fingerprints. The phase and magnitude features analysis is done based on the auditory perception.

关键词： Music Fingerprint recognition Delays Instruments Rocks Spectrogram Time-frequency analysis

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