Miracle-dz/UniFAR-FTUs huggingface dataset:
Dynamic spatially isolated secure zones for NoC-based many-core accelerators

Many-core architectures are becoming a major execution platform in order to face the increasing number of applications executed in parallel. While these architectures provide massive parallelism and high performance to the users, they also introduce key challenges in terms of security. Indeed, in order to leverage performance, a great number of applications running in parallel may share resources. A malicious application may compromise other applications sharing common resources or the whole system by directly accessing, deducing or retrieving sensitive data. This work focuses on a many-core accelerator architecture extended with mechanisms allowing the logical and spatial isolation of sensitive applications through the dynamic creation of secure zones. Each sensitive application is executed within a secure zone avoiding any resource sharing with other potentially malicious applications, preventing denial of services within the secure zones as well as confidentiality and integrity attacks. A set of services guarantying the dynamic creation and handling of spatially isolated secure zones in a many-core accelerator architecture is proposed. These services are integrated into a software controller on a many-core accelerator architecture and evaluated through virtual prototyping.
2015 Ieee International Conference on Big Data (big Data) Trustmr: Computation Integrity Assurance System for Mapreduce

—Data and computation integrity is the major concerns for the users of MapReduce systems. Most production-level MapReduce system optimistically assume that all nodes are trustworthy. Yet, even one compromised node can corrupt the integrity of final results generated by the computation. In the literature, this problem is addressed by many different approaches, where some of them proposed to use special-propose hardware by losing the ability to work with commodity machines, some others proposed to inject watermarking patterns by targeting only particular datasets and jobs, and others replicated the whole jobs by incurring huge overheads. In this paper, we propose a new replication-based method, which can achieve very high attack detection rates (e.g., 99.99%) while incurring only one fifth (20%) of the overhead incurred by the other competitive approaches. The method is based on the decomposition of MapReduce computation into smaller pieces (i.e., intermediate result production). A subset of these pieces are selectively generated in the replicated tasks, and this significantly reduces the network transfer of the replicated tasks. Our empirical results show that relatively small number of replicated intermediate results can provide high detection rate while considerably reducing the overhead of replication.
Arthroscopic Management of Chronic Patellar Tendinopathy

Background: In patients with patellar tendinopathy in whom nonoperative management is unsuccessful, surgery is an option to return to high levels of physical activity. Although open surgery is traditionally advocated, an arthroscopic approach may be safe and effective. Purpose: This study was undertaken to analyze medium- and long-term outcome of 64 patients undergoing arthroscopic surgery for the management of patellar tendinopathy after failing nonoperative treatment. Study Design: Case series; Level of evidence, 4. Methods: A total of 64 patients (73 knees), 27 of whom were professional athletes, with patellar tendinopathy refractory to nonoperative management underwent arthroscopic debridement of the adipose tissue of the Hoffa’s body posterior to the patellar tendon, debridement of abnormal patellar tendon, and excision of the lower pole of the patella. Preoperative and postoperative evaluation was undertaken using the International Knee Documentation Committee (IKDC), Lysholm knee scale, and Victorian Institute of Sport Assessment–Patella (VISA-P) scores for all patients at 1 and 3 years. No patients were lost to follow-up. Forty-three and 29 patients were similarly assessed at 5 and 10 years, respectively, after surgery. Return to sports and rehabilitation was also assessed. Results: The IKDC, Lysholm, and VISA-P scores all significantly improved at 1 and 3 years’ follow-up. The average preoperative IKDC score of 51.6 improved to 86.4 at both the 1- and 3-year stage. The average preoperative Lysholm score of 52.3 improved to 94.7 at 1-year follow-up and was 95.5 at 3-year follow-up. The average preoperative VISA-P score of 35.3 improved to 69.8 at the 1-year stage and was 70.7 at the 3-year follow-up. These scores remained significantly better for the patients assessed at 5 and 10 years’ follow-up. There were no postoperative complications. Nineteen of the 27 professional athletes returned to sports at the same level. Seven patients developed pain after sports within 3 years after the operation, a failure rate of 7 of 73 knees (9.6%). All patients were able to return to sports by 3 months. Conclusion: Arthroscopic surgery for patients with patellar tendinopathy, refractory to nonoperative management, appears to provide significant improvements in symptoms and function, with improvements maintained for at least 3 years. These results suggest that some patients may not be able to achieve their presymptom sporting level; or if they do, they may participate in sports with some degree of residual symptoms. Limited data show that these improvements are maintained for up to 10 years. Early return to sports may also be achieved.
Spark-GPU: An accelerated in-memory data processing engine on clusters

Apache Spark is an in-memory data processing system that supports both SQL queries and advanced analytics over large data sets. In this paper, we present our design and implementation of Spark-GPU that enables Spark to utilize GPU's massively parallel processing ability to achieve both high performance and high throughput. Spark-GPU transforms a general-purpose data processing system into a GPU-supported system by addressing several real-world technical challenges including minimizing internal and external data transfers, preparing a suitable data format and a batching mode for efficient GPU execution, and determining the suitability of workloads for GPU with a task scheduling capability between CPU and GPU. We have comprehensively evaluated Spark-GPU with a set of representative analytical workloads to show its effectiveness. Our results show that Spark-GPU improves the performance of machine learning workloads by up to 16.13x and the performance of SQL queries by up to 4.83x.
Stability of Ecological Communities and the Architecture of Mutualistic and Trophic Networks

Building a Network The relation between the architecture of ecological networks and community stability is important to understand the assembly of complex communities. By combining a model approach and a meta-analysis of a large collection of ecological networks, Thébault and Fontaine (p. 853; see the Perspective by Bascompte) found that network architecture and stability fundamentally differed between trophic networks that involved herbivory and mutualistic networks that involved pollination. These findings have implications for the understanding of community structure, evolution, and response to perturbation. Ecological network architecture differs between models of trophic (herbivore) and mutualistic (pollination) communities. Research on the relationship between the architecture of ecological networks and community stability has mainly focused on one type of interaction at a time, making difficult any comparison between different network types. We used a theoretical approach to show that the network architecture favoring stability fundamentally differs between trophic and mutualistic networks. A highly connected and nested architecture promotes community stability in mutualistic networks, whereas the stability of trophic networks is enhanced in compartmented and weakly connected architectures. These theoretical predictions are supported by a meta-analysis on the architecture of a large series of real pollination (mutualistic) and herbivory (trophic) networks. We conclude that strong variations in the stability of architectural patterns constrain ecological networks toward different architectures, depending on the type of interaction.
2016 Ieee International Conference on Big Data (big Data) Efficient Large Scale Near-duplicate Video Detection Base on Spark

—With the huge amount of web video data and its exponential growth in recent years, there are new challenges in Near-Duplicate Video Detection (NDVD) which have attracted much attention owing to its wide applications. One of the problems is how to extract discriminative features to achieve higher precision, and the other problem is how to improve the efficiency of large scale video analysis. Existing methods have predominantly focused on improving the precision and achieve some success on NDVD. However, it is an extremely challenging task to guarantee the higher precision and efficiency simultaneously. To balance the efficiency and precision, we propose a Multi-Feature based Parallel System (MFPS) for large scale NDVD to overcome these challenges. For feature extraction, we combine local and global features to accurately represent the critical information of video. In our work, not only Scale-Invariant Feature Transform (SIFT) but also Local Maximal Occurrence (LOMO) is introduced as local features and Color Name (CN) is adopted as global feature. Meanwhile, for SIFT and CN features, Bag-of-Visual-Words (BoVW) method is used to quantize the features due to its accuracy and efficiency in NDVD. Furthermore, we design a similarity measure for video pairs which is inspired by hough transform and sliding window idea. Finally, we implement the system on parallel cloud computing platform based on spark. A comprehensive evaluation is conducted on CC WEB VIDEO dataset which includes 12790 videos and 27% near-duplicates. Experimental results show that the proposed method is able to achieve some improvements in term of mAP against other methods. Moreover, our approach is efficient and achieves 5.8X speedup.
The Plantar Gap

Background: There have been diverse results, even in the same Torg type classification, in cases with fifth metatarsal stress fracture. Hypothesis: The “plantar gap” is correlated with the time for bone union and complications. It might be used for a prognostic factor. Study Design: Cohort study; Level of evidence, 3. Methods: Seventy-five cases with a fifth metatarsal stress fracture treated with modified tension band wiring from January 2003 to December 2008 were evaluated retrospectively. This consecutive series of patients included 71 male and 2 female patients with a mean of 19.8 years of age at the time of surgery. All of the enrolled patients were elite-level athletes. Each case was classified according to Torg classification and the degree of plantar gap was also measured. After the surgery, bone union was determined by computed tomography findings. Statistical analysis of the Torg classification and time for bone union, as well as plantar gap and time for bone union, was performed. Results: The mean time for bone union for each Torg type was 71.05 ± 21.77 days for type I, 104.48 ± 54.62 days for type II, and 122.92 ± 51.75 days for type III. There was a significant difference in the time for bone union among the 3 Torg types (P = .008). The mean time for bone union in group A (plantar gap <1 mm) was 71.21 ± 29.95 days and it was 126.4 ± 51.99 days for group B (plantar gap ≥1 mm) (significantly different; P < .001). In addition, there was a positive correlation of the time for bone union with the degree of plantar gap (ρ = .661, P < .001). In cases with Torg type II classification, there was a significant difference in the time for bone union between groups A and B (P < .001) In addition, there was a strong correlation between the time for bone union and the degree of plantar gap (ρ = .657, P < .001). There were 8 cases of nonunion in Torg type II, and 1 case in Torg III. With regard to the plantar gap, there was 1 case of nonunion in group A, and 8 cases in group B. Conclusion: The results of this study suggest that the plantar gap might be used for prognosis in cases with a fifth metatarsal stress fracture, even in patients with the same Torg classification.
Sign Flips and Spin Fluctuations in Iron High-Tc Superconductors

The symmetry of electron-pairing interactions in iron-based superconductors suggests a shared spin-mediated pairing mechanism with the cuprate family. In superconductors, the key process that allows current to travel without resistance is the formation of electron pairs that move as a single quantum state. The mechanism of pairing in the high-temperature (high-Tc) cuprate superconductors is still elusive, so the recent discovery of iron-based superconductors (1) sparked the hope that comparison with the cuprates would lead to a better understanding of pairing in both materials. On page 474 of this issue, Hanaguri et al. (2) report the experimental determination of the pairing symmetry in FeSexTe1−x. Combined with the recent observation of a spin fluctuation resonance in this material (3) akin to that seen in the cuprates (4), a compelling hypothesis emerges that these high-Tc superconductors share a common pairing mechanism.
Targeted delivery of adipose‐derived stem cells via acellular dermal matrix enhances wound repair in diabetic rats

Cell‐based therapeutic intervention has emerged as a new approach to accelerate wound closure. Adipose‐derived stem cells (ASCs), as a fascinating cell source, have received much attention in tissue repair and regeneration. In this study we evaluated the potential of acellular dermal matrix (ADM) scaffold serving as a carrier for the delivery of ASCs and investigated its therapeutic effects on wound healing. First, ASCs were isolated and characterized for multidifferentiation potential. ASCs–ADM grafts were then prepared, and ADM scaffold was shown to support the in vitro growth and proliferation of ASCs. Next, we analysed paracrine factors in conditioned medium and found that ASCs–ADM grafts secreted various cytokines, including VEGF, HGF, TGFβ and bFGF. Moreover, ASCs–ADM conditioned medium notably stimulated the migration and proliferation of fibroblasts. In vivo, we established an excisional wound model in diabetic rats which received phosphate‐buffered saline (PBS), ADM or ASCs–ADM grafts, respectively. Our results demonstrated that implantation of ASCs–ADM significantly enhanced tissue regeneration and increased epithelialization, resulting in accelerated wound closure. Immunofluorescence analysis further indicated that capillary density was evidently increased in the ASCs–ADM group compared with the control or ADM group. In addition, western blot analysis showed that ASCs–ADM significantly increased the expression of angiogenic factors, which was consistent with in vitro data. Taken together, our results suggest that targeted delivery of ASCs via ADM scaffold accelerate diabetic wound healing through a paracrine mechanism, with enhanced granulation tissue formation and increased re‐epithelialization and neovascularization. Copyright © 2012 John Wiley & Sons, Ltd.
Quantum Oscillations and Hall Anomaly of Surface States in the Topological Insulator Bi2Te3

Carrier Mobility in Topological Insulators In addition to an energy gap, which is a characteristic of all band insulators, the electronic structure of the recently discovered three-dimensional topological insulators Bi2Te3 and Bi2Se3 contains a surface state with a Dirac-like dispersion. This state is predicted to be associated with high carrier mobility. However, the transport properties of the surface state are obscured by the bulk material and challenging to measure. Qu et al. (p. 821, published online 29 July) produced crystals of Bi2Te3 with the Fermi energy lying in the bulk gap and detected quantum oscillations whose magnetic field dependence reveals that they come from a two-dimensional Fermi surface. An anomaly in the Hall conductance originating from the surface state was also observed. The two measurements independently yield mutually consistent high electron mobilities. Quantum oscillations are used to detect the surface current of a topological insulator, yielding high carrier mobilities. Topological insulators are insulating materials that display massless, Dirac-like surface states in which the electrons have only one spin degree of freedom on each surface. These states have been imaged by photoemission, but little information on their transport parameters, for example, mobility, is available. We report the observation of Shubnikov–de Haas oscillations arising from the surface states in nonmetallic crystals of Bi2Te3. In addition, we uncovered a Hall anomaly in weak fields, which enables the surface current to be seen directly. Both experiments yield a surface mobility (9000 to 10,000 centimeter2 per volt-second) that is substantially higher than in the bulk. The Fermi velocity of 4 × 105 meters per second obtained from these transport experiments agrees with angle-resolved photoemission experiments.
All-Inside Repair for a Root Tear of the Medial Meniscus Using a Suture Anchor

Background: There are no published articles reporting clinical outcomes after all-inside meniscal repair using a suture anchor for a medial meniscal root tear. Purpose: To evaluate the subjective and objective outcomes after repair of medial meniscal root tears. Study Design: Case series; Level of evidence, 4. Methods: Thirteen patients with a root tear of the medial meniscus underwent all-inside repair using a suture anchor. Postoperative evaluation of meniscal status was performed using physical examination criteria, specifically joint line tenderness, McMurray test, and follow-up magnetic resonance imaging (MRI). Functional evaluations were performed using Tegner activity level and Lysholm knee score. Follow-up MRI scans were obtained 6 months postoperatively to evaluate healing of the root tear and measure extrusion of the midbody of the medial meniscus. Results: The average follow-up was 30.8 months (range, 24-40 months). No patients had joint line tenderness or effusion. No patients demonstrated a positive McMurray test result postoperatively. The preoperative mean Tegner activity level was 1.9 (range, 1-6), and the mean Lysholm score was 69.1 (range, 53-91). At last follow-up, the mean Tegner activity level was 3.9 (range, 2-6), and the mean Lysholm score was 90.3 (range, 75-100). Improvements in both the Tegner activity level and Lysholm score were statistically significant (P = .001 and P = .000, respectively). Follow-up MRI was performed in 10 patients. Five (50%) patients showed complete healing; 2 of these 5 patients showed complete healing with isointense signal of a normal meniscus, and 3 showed intermediate signal tissue at the previous tear site without any high signal cleft or ghost sign. Four (40%) patients showed partial healing, and 1 (10%) showed no healing. Mean extrusion of the midbody of the medial meniscus was 3.9 mm (range, 2.2-7.1 mm) preoperatively and 3.5 mm (range, 1.2-6.1 mm) postoperatively. Extrusion was not significantly decreased. Conclusion: This study demonstrated symptomatic improvement after meniscal root repair using a suture anchor. However, follow-up MRI scans did not show complete healing of all repaired root tears.
Comment on “Patterns of Diversity in Marine Phytoplankton”

Barton et al. (Reports, 19 March 2010, p. 1509) argued that stable conditions enable neutral coexistence of many phytoplankton species in the tropical oceans, whereas seasonal variation causes low biodiversity in subpolar oceans. However, their model prediction is not robust. A minor deviation from the neutrality assumption favors coexistence in fluctuating rather than stable environments.
Electrical stimulation of cardiac adipose tissue‐derived progenitor cells modulates cell phenotype and genetic machinery

A major challenge of cardiac tissue engineering is directing cells to establish the physiological structure and function of the myocardium being replaced. Our aim was to examine the effect of electrical stimulation on the cardiodifferentiation potential of cardiac adipose tissue‐derived progenitor cells (cardiac ATDPCs). Three different electrical stimulation protocols were tested; the selected protocol consisted of 2 ms monophasic square‐wave pulses of 50 mV/cm at 1 Hz over 14 days. Cardiac and subcutaneous ATDPCs were grown on biocompatible patterned surfaces. Cardiomyogenic differentiation was examined by real‐time PCR and immunocytofluorescence. In cardiac ATDPCs, MEF2A and GATA‐4 were significantly upregulated at day 14 after stimulation, while subcutaneous ATDPCs only exhibited increased Cx43 expression. In response to electrical stimulation, cardiac ATDPCs elongated, and both cardiac and subcutaneous ATDPCs became aligned following the linear surface pattern of the construct. Cardiac ATDPC length increased by 11.3%, while subcutaneous ATDPC length diminished by 11.2% (p = 0.013 and p = 0.030 vs unstimulated controls, respectively). Compared to controls, electrostimulated cells became aligned better to the patterned surfaces when the pattern was perpendicular to the electric field (89.71 ± 28.47º for cardiac ATDPCs and 92.15 ± 15.21º for subcutaneous ATDPCs). Electrical stimulation of cardiac ATDPCs caused changes in cell phenotype and genetic machinery, making them more suitable for cardiac regeneration approaches. Thus, it seems advisable to use electrical cell training before delivery as a cell suspension or within engineered tissue. Copyright © 2013 John Wiley & Sons, Ltd.