Performance estimation with petri nets
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The document discusses using timed process Petri nets (TPPN) to model systems with shared resources. TPPNs use vectors to represent average transition times and rates. Linear programming problems (LPPs) can identify bottlenecks, but iterative strategies are weak and slow. Instead, heuristics provide better performance estimation and resource optimization. As a case study, the document applies TPPN modeling to a secure database system, examining the network, parameters, and results of sensitivity analysis. It concludes that TPPNs are useful for modeling but that heuristic algorithms are needed to reduce experiment time when modeling larger systems.
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Since blockchains are increasingly adopted in real-world applications, it is of paramount importance to evaluate their performance across diverse scenarios. Although the network infrastructure plays a fundamental role, its impact on performance remains largely unexplored. Some studies evaluate blockchain in cloud environments, but this approach is costly and difficult to reproduce. We propose a cost-effective and reproducible environment that supports both cluster-based setups and emulation capabilities and allows the underlying network topology to be easily modified. We evaluate five industry-grade blockchains Algorand, Diem, Ethereum, Quorum, and Solana across five network topologies fat-tree, full mesh, hypercube, scale-free, and torus and different realistic workloads smart contract requests and transfer transactions. Our benchmark framework, Lilith, shows that full mesh, hypercube, and torus topologies improve blockchain performance under heavy workloads. Algorand and Diem perform consistently across the considered topologies, while Ethereum remains robust but slower.Role of Glutamate, glutamine and Alanine in Transport of Ammonia in Tissues
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This slide explains the roles of Glutamate, Glutamine, and Alanine in safely transporting toxic ammonia from tissues to the liver and kidneys, where it is detoxified or excreted."MOLD -GENERAL CHARACTERISTICS AND CLASSIFICATION
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This is a brief note on types of organism on food with special focus on molds. This includes their general characteristics, spores; their classification, mycotoxins, and how the molds affect food. GBSN__Unit 2 - Control of Microorganisms
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Microbiology for Nursing students - According to New PNC course curriculum - 2025
How Psychology Can Power Product Decisions: A Human-Centered Blueprint- Shray...
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In an era where users are bombarded with endless choices, capturing attention and driving meaningful engagement isn't just about building features it's about understanding what drives human behavior at its core. This presentation offers a deep dive into how psychological principles can inform smarter, more intuitive product decisions. Its not just theory its a hands-on blueprint for applying human-centered thinking at every stage of product development.
Grounded in behavioral science, consumer psychology, and cognitive design, this deck unpacks the key psychological drivers behind user motivation, decision-making, emotional engagement, and habit formation. From attention economics and dopamine-driven interactions to trust cues, loss aversion, and the paradox of choice you'll see how to harness what the mind naturally does to build digital products people dont just use they return to, talk about, and even advocate for.
Well explore:
Cognitive biases that shape user perception and choices and how to use them to your advantage without crossing ethical lines.
Emotional design principles that build trust, trigger desire, and turn features into feelings.
User behavior loops that build stickiness, deepen retention, and create emotional investments.
Psychological friction when to reduce it for conversion, and when to add it for intentionality.
Dark patterns vs. ethical persuasion the thin line between influence and manipulation.
A/B testing with a psychological lens learning not just what works, but why it works.
This is more than UX research or product marketing fluff. Its a call to build with empathy, backed by science, and sharpened by real-world product thinking. Whether youre shaping onboarding flows, gamifying engagement, designing pricing models, or rethinking retention strategies this deck will arm you with a new lens: the human mind.
Perfect for product managers, growth strategists, UX designers, behavioral scientists, and anyone serious about building products that resonate, retain, and inspire action.
Because at the heart of every great product is a human.
Lets start building for the brain not just the screen.An Analysis Of The Pearl Short Story By John Steinbeck
An Analysis Of The Pearl Short Story By John SteinbeckBillyDarmawan3
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John Steinbeck Popular Short Story
The Pearl adalah sebuah novella yang ditulis oleh John Steinbeck yang mengisahkan perjuangan seorang nelayan miskin bernama Kino dan istrinya, Juana, yang hidup sederhana di sebuah desa kecil Meksiko. Suatu hari, Kino menemukan sebuah mutiara raksasa "the Pearl of the World" yang diyakini akan mengubah nasib mereka.
Namun, alih-alih membawa kebahagiaan, mutiara itu justru menimbulkan keserakahan, kekerasan, dan penderitaan. Masyarakat di sekitarnya mulai menunjukkan niat jahat, dan bahkan keluarga Kino sendiri terjebak dalam konflik batin antara harapan dan kehancuran. Pada akhirnya, The Pearl menjadi simbol ironi: sesuatu yang tampak sebagai berkah berubah menjadi kutukan.
Melalui cerita ini, Steinbeck mengeksplorasi tema keserakahan, harapan, kemiskinan, dan ketimpangan sosial. Dengan gaya narasi yang lugas namun penuh makna simbolik, The Pearl menjadi refleksi tajam tentang sifat manusia dan dampak tragis dari keinginan yang tak terkendali.
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Matt Ridley is a British independent science popularizer, journalist, entrepreneur, and author of several bestselling books, for which he has received numerous awards. He focuses primarily on the economic, biological, and environmental dimensions of the spontaneous functioning and advancement of human society. Death in Sleep Apnea: Who and How It Kills
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Evaluation of mortality in obstructive sleep apnea.Matt Ridley: Economic Evolution and Ideas that have Sex
Matt Ridley: Economic Evolution and Ideas that have SexConservative Institute / Konzervat鱈vny in邸tit炭t M. R. tef叩nika
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Performance estimation with petri nets
- 1. On the Performance Estimation and Resource Optimization in Process Petri Nets Feliciano Colella November 25, 2014
- 2. Introduction I Timed Process Petri Nets (TPPN). I Vector of average times of transitions; I Vector of rates associated to transitions. Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 2 / 8
- 3. Introduction I Timed Process Petri Nets (TPPN). I Vector of average times of transitions; I Vector of rates associated to transitions. I Dening LPPs in order to nd Bottlenecks of the net. Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 2 / 8
- 4. Introduction I Timed Process Petri Nets (TPPN). I Vector of average times of transitions; I Vector of rates associated to transitions. I Dening LPPs in order to nd Bottlenecks of the net. I Iterative strategy is weak and slow Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 2 / 8
- 5. Introduction I Timed Process Petri Nets (TPPN). I Vector of average times of transitions; I Vector of rates associated to transitions. I Dening LPPs in order to nd Bottlenecks of the net. I Iterative strategy is weak and slow ! Heuristic works better. Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 2 / 8
- 6. Introduction I Timed Process Petri Nets (TPPN). I Vector of average times of transitions; I Vector of rates associated to transitions. I Dening LPPs in order to nd Bottlenecks of the net. I Iterative strategy is weak and slow ! Heuristic works better. I Case Study: A Secure Database System (SDBS). 1. Use Case Diagram; 2. Sequence Diagram; 3. Petri Net modelling (Network + Parameters); 4. Sensitivity Analysis. Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 2 / 8
- 7. The Problem Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 3 / 8
- 8. The Model The Network ... Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 4 / 8
- 9. The Model ... and its parameters. Figure: (a), (c) Duration of the exponential transition in the Net. Figure: (b) Number of instances of each resource. Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 5 / 8
- 10. The Results Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 6 / 8
- 11. Conclusion I TPPN are a good formalism to model the behaviour of systems with shared resources. I Dealing with the LP problems is useful but it quickly explodes in terms of complexity with bigger systems. I Further attention should be put on designing better Heuristics/Algorithms in order to reduce the time of the Experiments (more than 1 day is really a lot !). Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 7 / 8
- 12. Thank you for the attention. Feliciano Colella Formal Method - Process Petri Nets November 25, 2014 8 / 8