Active Threads Research Articles

A High-bandwidth High-capacity Hybrid 3D Memory for GPUs

GPUs execute thousands of active threads simultaneously, requiring high memory bandwidth to handle multiple memory requests efficiently. The memory bandwidth in GPUs has always been increasing, but it is still insufficient for the demands of fine-grained threads, necessitating a higher memory bandwidth. Important workloads like deep learning and data analytics demand terabytes of data processing, necessitating high memory capacity and bandwidth to avoid performance overheads. True-3D stacking of non-volatile memory layers on GPUs can provide the required higher bandwidth and capacity, enhancing performance and energy efficiency. We propose a high-bandwidth high-capacity hybrid 3D memory (H3DM) that doubles bandwidth through true-3D integration compared to the baseline GPU architecture and affords 272 GB of total memory capacity by stacking 8 PCM layers (each of 32 GB) and two DRAM layers (each of 8 GB).

Efficient parallelism in Breadth-First Search: A comprehensive analysis and implementation

The Breadth-First Search (BFS) entails a systematic traversal of a given graph, G = (V, E), layer by layer, starting from a specific vertex. Recognized as a cornerstone methodology for graph exploration, the importance of BFS has skyrocketed, especially with the increasing demands of graph-based data processing. However, as the vertex count expands, traditional serial implementations reveal their limitations, faltering in terms of time and space efficiency. This paper aims to contrast the efficiencies of standard BFS with its parallelized iteration. Introducing a shared-memory model of level-synchronous parallel BFS, the approach integrates optimizations to navigate the challenges posed by implicit barriers and critical sections. Employing the Graph500 benchmark, this parallel methodology is meticulously evaluated, highlighting the speedup concerning various thread counts. Initial findings unveil a compelling pattern: speedup generally correlates positively with the number of active threads. However, if the thread count breaches the system's inherent capacity, the speedup hits a plateau, showing only marginal fluctuations without significant increases. These statistical revelations not only vouch for the advantages of BFS parallelization but also emphasize a critical insight: judiciously increasing thread count, up to a system-specified limit, can yield peak efficiency.

How Businesses Can Assess the Impacts of Their Charitable Activities on the Rights of Children and Youth

There has been increasing attention given to the relationship between children’s rights and business due to a greater understanding of the direct and indirect impacts that businesses have on children and youth. Concomitantly, many businesses are involved in charitable work. Do charitable activities performed by businesses provide an entry point for considering children’s rights? Further, do these charitable activities facilitate an opportunity for the amalgamation of corporate social responsibility (CSR) and business and human rights? It is hypothesised that charitable contributions can facilitate a greater understanding of children’s rights and subsequently advance implementation. Accordingly, businesses can recognise their capacity to do more than mitigate their negative impacts, and positively influence the realisation of children’s rights. This can be facilitated through the improved assessment of charitable contributions using a child-rights-based approach. This research paper is informed by qualitative individual interviews with 15 stakeholders from pertinent professional sectors, five focus groups with 38 children and youth, and academic and grey literature reviews. It is concluded that attention to impact assessment offers a valuable avenue forward by which to knit the threads of activity regarding both human rights and corporate social responsibility through accountability. A proposed checklist may stimulate future actions and developments in children’s rights within and outside of businesses.

Threads of microbial activity on quasi-anoxic environments: Case studies from Oligocene to Miocene of the Central Paratethys

Microbial activity can be expressed in a wide range of products and forms including boring structures, biofilm-like subproducts, and framboidal pyrite precipitates. Microendolithic structures, in particular, are found in carbonate hardgrounds including tests of planktonic and benthic foraminifera and their traces can provide an extra paleoenvironmental marker of relative paleobathymetry, oxygenation, and environmental stress. Variegated traces of microbial activity including microborings, framboidal pyrite bacterial subproducts, and probable biofilms were herein studied in tests of benthic foraminifera from dysphotic to aphotic, shelf to an upper bathyal hypoxic environment. Collected material is from 6 localities in the Central Paratethys area, the Czech Republic (LOM-1 Mikulov, Hevlín), Slovakia (DNV, LKŠ-1), and Hungary (Rozalia), ranging from Rupelian to Serravalian. Microendolithic morphology was examined from resin casts obtained from the tests resulting in a total of ten ichnospecies and four other forms for which it was only possible to establish affinity on higher ranks. Levels of oxygen depletion were estimated from Benthic Foraminifera Oxygen index (BFOI). The bacterial origin of pyrite was inferred by morphology, grain size, and ẟS34 values. The number of observed microboring structures gradually reduce with the decrease of oxygen content, while the precipitation of framboidal pyrite were increasing at the same time. Biofilm-like structures, apart from the suggestive morphology, also showed an enriched content of elemental iron, sulfur, and phosphorus. Raman spectroscopy shows similarities with organic pigment spectra and is still under investigation.

Comparison of insertion torque, implant stability quotient and removal torque, in two different implant designs with and without osseodensification. - An ex vivo bench top study.

Primary stability is an important factor in influencing the outcome of dental implants. Osteotomy modification techniques mentioned, include osteotomes for bone condensation, under-preparation of osteotomy and Osseodensification (OD). The objective of our twin arm study was to assess how two different implant designs respond to conventional osteotomy drilling and how these values obtained compare with OD. The study comprised a total of 80 implants inserted in pig tibia bone. Group 1a (n=20) consisted of tapered internal implants and group 1b (n=20) consisted of tapered pro implants, both inserted with conventional drilling. Group 2a (n=20) consisted of tapered internal implants and group 2b (n=20) consisted of tapered pro implants, both inserted with OD. Each implant inserted was measured for implant stability quotient (ISQ), insertion torque and removal torque. Group 1a showed a significantly lower ISQ, mean insertion and removal torque and as compared to Group 1b. Group 2a and 2b had comparable mean values for all the three parameters. Inter-group comparison showed a higher ISQ and insertion torque value for group 2 than group 1. Intra-group assessment showed a significantly lower value for all parameters for sub-group a than b. OD enhances primary stability of implants in bone; but when no OD is used, the tapered pro implant design offers a better primary stability. This may be attributed to the active thread design.

ПЕРСПЕКТИВЫ ПРИМЕНЕНИЯ ЭНДООССАЛЬНОГО ЦЕЛЬНОКЕРАМИЧЕСКОГО ВИНТОВОГО ОДНОЭТАПНОГО ИММЕДИАТ-ИМПЛАНТАТА В ОРТОПЕДИЧЕСКОЙ РЕАБИЛИТАЦИИ ПАЦИЕНТОВ С АДЕНТИЕЙ

The subject of the study is the prospects for the introduction of an endosseous all-ceramic screw one-stage immediate implant in the clinical practice of orthopedic rehabilitation.
 The objectives analysis of the prospects for the use of the developed dental implant (endossal all-ceramic screw single-stage implant) in dental practice during orthopedic rehabilitation of patients with adentia.
 Methodology. The study was performed on the basis of an analysis of orthopedic rehabilitation means and their effectiveness in patients of dental clinics in the cities of Kemerovo for 2018–2022.
 Results.The results of rehabilitation of patients with adentia using dental implants based on zirconium dioxide (both imported and patented bio-implants) and implants based on titanium alloys are presented.
 The new endosseous all-ceramic screw one-stage implant developed by the author of the study (RF Patent for Invention No. 2651052; Eurasian Patent No. 035482) is distinguished by its design (rough active two-component thread passing into a polished neck by switching the platform and then into a suprastructure with the possibility of its individualization in the cavity mouth) and the method of treating the surface of the exclusively threaded part of the implant with calcium hydroxyapatite.
 The possibility of using the developed implant will satisfy the needs of patients for a minimally invasive implantation procedure, ensuring its economic efficiency in relation to an analogue imported ceramic implant. In addition, due to the specialized surface treatment, the developed implant does not require the use of bone substitutes, and the presence of a biocoating allows expanding its use in groups of patients with somatic pathologies.
 Conclusions. The performed study allows us to recommend the use of the developed bio-implant in clinical dentistry in order to study the possibilities of its use in the near and long term.

Value adding in venture capital as a mesh of practices

PurposeThis paper aims to adopt a practice-theory, “site ontology” perspective to understand how venture capitalists (VCs) add value to their portfolio companies (PCs).Design/methodology/approachThe empirical research involves a field ethnographic study of a VC firm in Dubai, focused on revealing what constitutes value and what VCs do to add this value to their PCs.FindingsValue adding is a profoundly social, embedded process interconnected with other ecosystem actors, investment practices and organizations. The value adding threads of VC activity are part of a holistic configuration of practices that span the investment lifecycle and different levels within the firm.Originality/valueThis research contributes a rich account of the social, symbolic nature of VC activity, depicting the everyday activities that comprise value adding practices. It is among the first to introduce practice theory to the VC context and open up a new conversation about its social ontology.

Differential Bank Migration Limits the Lifespan and Width of Braided Channel Threads

AbstractSuccessful management of flooding and erosion hazards on floodplains depends on our ability to predict a river channel's shape and the lifespan during which it will continue to flow. Recent progress has improved our understanding of what sets the lifespan and width of single‐thread channels; the next challenge is to extend this knowledge to braided channels and their interwoven sub‐channels (threads). In this study, we investigate the lifespan and width of braided channel threads in a large experimental data set, coupled with particle‐image velocimetry‐derived measurements of riverbank erosion and accretion. We find that, unlike single‐thread channels, braided channels in the experiment do not exhibit an equilibrium between bank erosion and accretion. Instead, bank erosion outpaces lateral accretion, causing individual threads to widen and infill until they are abandoned. Thread lifespan is limited to the time it takes for threads to triple their width: tripling of the width yields enough bank material to aggrade more than half the channel depth, at which point flow is rerouted to a narrower thread. In consequence the width of active threads is limited to three times their initial width. Threshold channel theory accurately predicts the median thread width, which is roughly double the initial width and two‐thirds the limiting width. The results are consistent with existing field data and suggest that differential bank migration is sufficient to explain why braided channels show greater width variability and higher width‐to‐depth ratios than their single‐thread counterparts.

Aberdeen, City of Culture?

Aberdeen, City of Culture?

Inside Cover: Active Mechanical Threading by a Molecular Motor (Angew. Chem. Int. Ed. 19/2022)

A molecular motor setup allowing to harness the trajectory of directional motor rotation for an active mechanical threading process is presented by Henry Dube et al. in their Research Article (DOI: 10.1002/anie.202201882). The motor is embedded into a macrocycle and its indane-based rotor fragment then serves as “revolving door” in the light-driven–rotation. In this way a process akin to macroscopic threading of a needle is miniaturized to the molecular level offering a first entry point to mechanical molecular knitting or weaving processes.

Innentitelbild: Active Mechanical Threading by a Molecular Motor (Angew. Chem. 19/2022)

Innentitelbild: Active Mechanical Threading by a Molecular Motor (Angew. Chem. 19/2022)

Active Mechanical Threading by a Molecular Motor.

Molecular motors transform external energy input into directional motions and offer exquisite precision for nano‐scale manipulations. To make full use of molecular motor capacities, their directional motions need to be transmitted and used for powering downstream molecular events. Here we present a macrocyclic molecular motor structure able to perform repetitive molecular threading of a flexible tetraethylene glycol chain through the macrocycle. This mechanical threading event is actively powered by the motor and leads to a direct translation of the unidirectional motor rotation into unidirectional translation motion (chain versus ring). The mechanism of the active mechanical threading is elucidated and the actual threading step is identified as a combined helix inversion and threading event. The established molecular machine function resembles the crucial step of macroscopic weaving or sewing processes and therefore offers a first entry point to a “molecular knitting” counterpart.

Active Mechanical Threading by a Molecular Motor**

AbstractMolecular motors transform external energy input into directional motions and offer exquisite precision for nano‐scale manipulations. To make full use of molecular motor capacities, their directional motions need to be transmitted and used for powering downstream molecular events. Here we present a macrocyclic molecular motor structure able to perform repetitive molecular threading of a flexible tetraethylene glycol chain through the macrocycle. This mechanical threading event is actively powered by the motor and leads to a direct translation of the unidirectional motor rotation into unidirectional translation motion (chain versus ring). The mechanism of the active mechanical threading is elucidated and the actual threading step is identified as a combined helix inversion and threading event. The established molecular machine function resembles the crucial step of macroscopic weaving or sewing processes and therefore offers a first entry point to a “molecular knitting” counterpart.

Optimizing the EDP of OpenMP applications via concurrency throttling and frequency boosting

The increasing number of cores in multicore architectures has brought the need for better use of hardware resources. Consequently, different solutions have become widely adopted to optimize the execution of parallel applications: dynamic concurrency throttling (DCT) and turbo-boosting. While DCT artificially reduces the number of active threads to improve the performance and energy consumption, turbo-boosting increases the processor’s frequency above the base operating levels to provide maximum performance, considering the Thermal Design Power (TDP). However, as many parallel applications are unbalanced, combining both optimization knobs is not a straightforward task. Therefore, we propose TBFT. It is a transparent and automatic approach that concurrently exploits DCT and turbo-boosting to optimize OpenMP parallel applications. For that, TBFT implements a DCT Engine to find the ideal or near-ideal number of threads in parallel regions and a Boosting Engine to adjust the boosting operating mode w.r.t. the CPU workload. When executing twelve well-known benchmarks on three multicore systems, we show that TBFT outperforms different state-of-the-art strategies without jeopardizing the performance.

Evaluation of biomechanical effects of different implant thread designs and diameters on all-on-four concept

Aim All-on-four concept involves the use of four anterior dental implants in the edentulous jaw to overcome anatomic limitations of residual alveolar bone. The impact of implant thread design and diameter on the biomechanical performance of all-on-four concept is not yet fully understood. The purpose of this study was to investigate the biomechanical behavior of all-on-four concept with different combinations of thread designs and diameters through a three dimensional Finite Element Analysis. Materials and methods Six three-dimensional finite element models of edentulous mandible were developed. The models included the combinations of 3.5 and 4.3 mm diameter implants with active and passive thread designs. Vertical, oblique and horizontal loads were applied anterior to the end of the cantilever. Von Mises, maximum principal and minimum principal stresses were analysed. Results The results indicated a tendency towards stress reduction in Von Mises stress values of dental implants with the increase in diameter for both mesial and distal implants. In narrow implants active thread design resulted in lower Von Mises stress values than passive thread design. Active thread design demonstrated higher bone stress when compared to passive thread design. The analysis also revealed the importance of mesial implant for diminishing stresses on the distal implant and their surrounding bone under horizontal and oblique loading. Conclusion The comparison of the models suggest that use of wide implant is advantageous in the all-on-four concept. There is a biomechanical advantage in using narrow implants with active thread design in horizontally inadequate bone. The thread design was more significant in terms of increasing bone stress than implant diameter. The mesial implant influences the biomechanical behavior of the whole design, contributing to a more favorable stress distribution under horizontal and oblique loading conditions.

Design (Non) Fiction: Deconstructing/Reconstructing the Definitional Dualism of AI

2001: A Space Odyssey (Kubrick, 1968) speculates on humanities technological ascension through the exploration of space and the ultimate transcendence of humanity galvanised by the invention of AI. Every detail of this portrayal was an exercise in World Building, with careful considerations of then state-of-the-art technology and informed predictions. Kubrick’s speculative vision is comparative to the practice of Design Fiction, by suspending disbelief and leveraging a technologies emergence to question the future’s sociotechnical landscape and its ramifications critically. Discovery’s AI system, Hal9000, is a convincing speculation of intelligence with Kubrick’s vision showcasing current and long-term aims in AI research. To this end, Hal9000 uniquely portrays Artificial General Intelligence (AGI) underpinned by visualising ‘narrow’ AI subproblems; thereby, simultaneously highlighting then current research agendas within AI and manifesting them into the aspirational research agenda of human-computer symbiosis. As a result of Kubrick’s mastery in suspending a viewer’s disbelief despite portraying a particular reality for AI, and humanities fascination with artificial life, the term AI simultaneously refers to the grand vision of AGI as well as relating to the contemporary reality of narrow AI. This confusion, along with establishing AI’s ontology, are current challenges that need addressing to create effective and acceptable realisations of AI. This paper responds to the ontological confusion by reviewing and comparing Kubrick’s speculative methodology to the practice of Design Fiction by unpacking Hal9000 as a diegetic prototype while defining the active threads of ‘AI’s Definitional Dualism’. The paper will also present a Design Fiction submerged in the reality of narrow AI and the adoption of a More-Than Human Centred Design approach to address the complexity of AI’s ontology in alternative ways. Finally, this paper will also define the importance of researching the semantics of AI technology and how film and Design Fiction offer a discursive space for design research to transpire.

A Representation of Membrane Computing with a Clustering Algorithm on the Graphical Processing Unit

Long-timescale simulations of biological processes such as photosynthesis or attempts to solve NP-hard problems such as traveling salesman, knapsack, Hamiltonian path, and satisfiability using membrane systems without appropriate parallelization can take hours or days. Graphics processing units (GPU) deliver an immensely parallel mechanism to compute general-purpose computations. Previous studies mapped one membrane to one thread block on GPU. This is disadvantageous given that when the quantity of objects for each membrane is small, the quantity of active thread will also be small, thereby decreasing performance. While each membrane is designated to one thread block, the communication between thread blocks is needed for executing the communication between membranes. Communication between thread blocks is a time-consuming process. Previous approaches have also not addressed the issue of GPU occupancy. This study presents a classification algorithm to manage dependent objects and membranes based on the communication rate associated with the defined weighted network and assign them to sub-matrices. Thus, dependent objects and membranes are allocated to the same threads and thread blocks, thereby decreasing communication between threads and thread blocks and allowing GPUs to maintain the highest occupancy possible. The experimental results indicate that for 48 objects per membrane, the algorithm facilitates a 93-fold increase in processing speed compared to a 1.6-fold increase with previous algorithms.

Sediment flux‐driven channel geometry adjustment of bedrock and mixed gravel–bedrock rivers

AbstractSediment supply (Qs) is often overlooked in modelling studies of landscape evolution, despite sediment playing a key role in the physical processes that drive erosion and sedimentation in river channels. Here, we show the direct impact of the supply of coarse‐grained, hard sediment on the geometry of bedrock channels from the Rangitikei River, New Zealand. Channels receiving a coarse bedload sediment supply are systematically (up to an order of magnitude) wider than channels with no bedload sediment input for a given discharge. We also present physical model experiments of a bedrock river channel with a fixed water discharge (1.5 l min−1) under different Qs (between 0 and 20 g l−1) that allow the quantification of the role of sediment in setting the width and slope of channels and the distribution of shear stress within channels. The addition of bedload sediment increases the width, slope and width‐to‐depth ratio of the channels, and increasing sediment loads promote emerging complexity in channel morphology and shear stress distributions. Channels with low Qs are characterized by simple in‐channel morphologies with a uniform distribution of shear stress within the channel while channels with high Qs are characterized by dynamic channels with multiple active threads and a non‐uniform distribution of shear stress. We compare bedrock channel geometries from the Rangitikei and the experiments to alluvial channels and demonstrate that the behaviour is similar, with a transition from single‐thread and uniform channels to multiple threads occurring when bedload sediment is present. In the experimental bedrock channels, this threshold Qs is when the input sediment supply exceeds the transport capacity of the channel. Caution is required when using the channel geometry to reconstruct past environmental conditions or to invert for tectonic uplift rates, because multiple configurations of channel geometry can exist for a given discharge, solely due to input Qs. © 2020 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd

Standarisasi Resep Rendang Daging Di Lubuk Alung Kabupaten Padang Pariaman

This research aims to produce a Standard recipe and quality beef rendang. This type of research is qualitative and quantitative research using mixed method. The research was conducted in the city of Lubuk Alung in March 2020. Data source There are two namely: a qualitative data source is taken from people who are good at making meat rendang, quantitative data sources are obtained from 5 limited panelists. Qualitative data collection techniques are observations, interviews, documentation and quantitative data collection techniques are prganoleptic test poll formats. Qualitative data analysis techniques using three threads of activity are: data reduction, data presentation, drawing conclusions and quantitative data analysis techniques using formulas (Mx = ∑ x/N), the validity of qualitative data validity test data namely: extension Observational, diligent observation, and tringulation. Based on the results of the research obtained Rendang meat recipes include materials used, the number of ingredients, how to make, and the quality of Rendang meat. From this beef Rendang recipe that is used as a standardized beef Rendang recipe that has been converted. Standardized beef Rendang recipe conducted organoleptic test to quality to get the good quality of beef Rendang include: The form of Beef rendang (square), color (blackish brown), aroma (fragrant), texture (soft), and flavor (savory).

Leadership in interprofessional healthcare teams: Empowering knotworking with followership

Healthcare professionals need to be able to collaborate in interprofessional healthcare teams (IHTs). This paper discusses how healthcare professionals (can) contribute to IHT effectiveness. Using cultural historical activity theory and its affiliated concept of knotworking, it argues that healthcare professionals would benefit from developing not just leadership but also followership skills. Moreover, IHT collaborators need the ability to switch fluently between leader and follower roles as appropriate to advance patient care. This fluency is essential for collaborative knotworking. Knotworking refers to the process of tying and retying together individual threads of activity and expertise from across the IHT, over time, to achieve specific objects. Knotworking highlights the dynamic dimensions of IHT collaboration that require professionals to be both effective leaders and followers. The perspectives presented in this paper lead to a different view of IHTs, one that recognizes how leaders and followers co-produce the leadership teams need.