Analyzing and Visualizing Projects and their Relations in Software Ecosystems presents an approach to help developers understand and navigate between projects in related software ecosystems. The approach generates word clouds from project documentation to summarize projects. It then maps relationships between word clouds to identify related projects. This allows developers to better understand the scope and connections between projects within software ecosystems.
Software analytics (for software quality purpose) is a statistical or machine learning classifier that is trained to identify defect-prone software modules. The goal of software analytics is to help software engineers prioritize their software testing effort on the most-risky modules and understand past pitfalls that lead to defective code. While the adoption of software analytics enables software organizations to distil actionable insights, there are still many barriers to broad and successful adoption of such analytics systems. Indeed, even if software organizations can access such invaluable software artifacts and toolkits for data analytics, researchers and practitioners often have little knowledge to properly develop analytics systems. Thus, the accuracy of the predictions and the insights that are derived from analytics systems is one of the most important challenges of data science in software engineering.
In this work, we conduct a series of empirical investigation to better understand the impact of experimental components (i.e., class mislabelling, parameter optimization of classification techniques, and model validation techniques) on the performance and interpretation of software analytics. To accelerate a large amount of compute-intensive experiment, we leverage the High-Performance-Computing (HPC) resources of Centre for Advanced Computing (CAC) from Queen’s University, Canada. Through case studies of systems that span both proprietary and open- source domains, we demonstrate that (1) realistic noise does not impact the precision of software analytics; (2) automated parameter optimization for classification techniques substantially improve the performance and stability of software analytics; and (3) the out-of- sample bootstrap validation technique produces a good balance between bias and variance of performance estimates. Our results lead us to conclude that the experimental components of analytics modelling impact the predictions and associated insights that are derived from software analytics. Empirical investigations on the impact of overlooked experimental components are needed to derive practical guidelines for analytics modelling.
How much time it takes for my feature to arrive?Daniel Alencar
How much time it takes for a bug fix or a new feature be available to users? We did an empirical work to better understand what makes a new feature or bug fix to arrive faster to users
Software analytics (for software quality purpose) is a statistical or machine learning classifier that is trained to identify defect-prone software modules. The goal of software analytics is to help software engineers prioritize their software testing effort on the most-risky modules and understand past pitfalls that lead to defective code. While the adoption of software analytics enables software organizations to distil actionable insights, there are still many barriers to broad and successful adoption of such analytics systems. Indeed, even if software organizations can access such invaluable software artifacts and toolkits for data analytics, researchers and practitioners often have little knowledge to properly develop analytics systems. Thus, the accuracy of the predictions and the insights that are derived from analytics systems is one of the most important challenges of data science in software engineering.
In this work, we conduct a series of empirical investigation to better understand the impact of experimental components (i.e., class mislabelling, parameter optimization of classification techniques, and model validation techniques) on the performance and interpretation of software analytics. To accelerate a large amount of compute-intensive experiment, we leverage the High-Performance-Computing (HPC) resources of Centre for Advanced Computing (CAC) from Queen’s University, Canada. Through case studies of systems that span both proprietary and open- source domains, we demonstrate that (1) realistic noise does not impact the precision of software analytics; (2) automated parameter optimization for classification techniques substantially improve the performance and stability of software analytics; and (3) the out-of- sample bootstrap validation technique produces a good balance between bias and variance of performance estimates. Our results lead us to conclude that the experimental components of analytics modelling impact the predictions and associated insights that are derived from software analytics. Empirical investigations on the impact of overlooked experimental components are needed to derive practical guidelines for analytics modelling.
How much time it takes for my feature to arrive?Daniel Alencar
How much time it takes for a bug fix or a new feature be available to users? We did an empirical work to better understand what makes a new feature or bug fix to arrive faster to users
Partitioning Composite Code Changes to Facilitate Code Review (MSR2015)Sung Kim
Yida's presentation at MSR 2015!
Abstract—Developers expend significant effort on reviewing source code changes, hence the comprehensibility of code changes directly affects development productivity. Our prior study has suggested that composite code changes, which mix multiple development issues together, are typically difficult to review. Unfortunately, our manual inspection of 453 open source code changes reveals a non-trivial occurrence (up to 29%) of such composite changes.
In this paper, we propose a heuristic-based approach to automatically partition composite changes, such that each sub-change in the partition is more cohesive and self-contained. Our quantitative and qualitative evaluation results are promising in demonstrating the potential benefits of our approach for facilitating code review of composite code changes.
This slides show
1. How to obtain code coverage information for Java code
2. What kind of code coverage it is possible to get
3. Is 100% block coverage feasible, is it useful
4. How the code coverage could be used for more than discovering a percentage of uncovered code
The Impact of Test Ownership and Team Structure on the Reliability and Effect...Kim Herzig
Context: Software testing is a crucial step in most software development processes. Testing software is a key component to manage and assess the risk of shipping quality products to customers. But testing is also an expensive process and changes to the system need to be tested thoroughly which may take time. Thus, the quality of a software product depends on the quality of its underlying testing process and on the effectiveness and reliability of individual test cases.
Goal: In this paper, we investigate the impact of the organizational structure of test owners on the reliability and effectiveness of the corresponding test cases. Prior empirical research on organizational structure has focused only on developer activity. We expand the scope of empirical knowledge by assessing the impact of organizational structure on testing activities.
Method: We performed an empirical study on the Windows build verification test suites (BVT) and relate effectiveness and reliability measures of each test run to the complexity and size of the organizational sub-structure that enclose all owners of test cases executed.
Results: Our results show, that organizational structure impacts both test effectiveness and test execution reliability. We are also able to predict effectiveness and reliability with fairly high precision and recall values.
Conclusion: We suggest to review test suites with respect to their organizational composition. As indicated by the results of this study, this would increase the effectiveness and reliability, development speed and developer satisfaction.
More details:
ESEM 2014 presentation for paper "The Impact of Test Ownership and Team Structure on the Reliability and Effectiveness of Quality Test Runs". For more details please see http://dl.acm.org/citation.cfm?id=2652524.2652535&coll=DL&dl=GUIDE&CFID=569962862&CFTOKEN=20804180.
AVATAR : Fixing Semantic Bugs with Fix Patterns of Static Analysis ViolationsDongsun Kim
Fix pattern-based patch generation is a promising direction in Automated Program Repair (APR). Notably, it has been demonstrated to produce more acceptable and correct patches than the patches obtained with mutation operators through genetic programming. The performance of pattern-based APR systems, however, depends on the fix ingredients mined from fix changes in development histories. Unfortunately, collecting a reliable set of bug fixes in repositories can be challenging. In this paper, we propose to investigate the possibility in an APR scenario of leveraging code changes that address violations by static bug detection tools. To that end, we build the AVATAR APR system, which exploits fix patterns of static analysis violations as ingredients for patch generation. Evaluated on the Defects4J benchmark, we show that, assuming a perfect localization of faults, AVATAR can generate correct patches to fix 34/39 bugs. We further find that AVATAR yields performance metrics that are comparable to that of the closely-related approaches in the literature. While AVATAR outperforms many of the state-of-the- art pattern-based APR systems, it is mostly complementary to current approaches. Overall, our study highlights the relevance of static bug finding tools as indirect contributors of fix ingredients for addressing code defects identified with functional test cases.
Who Should Review My Code? A file-location based code-reviewer recommendation approach for modern code review.
This research study is presented at the 22nd IEEE International Conference on Software Analysis, Evolution, and Reengineering (SANER2015)
Find more information and preprint at patanamon.com
Finding Help with Programming Errors: An Exploratory Study of Novice Software...Preetha Chatterjee
Monthly, 50 million users visit Stack Overflow, a popular Q&A forum used by software developers, to share and gather knowledge and help with coding problems. Although Q&A forums serve as a good resource for seeking help from developers beyond the local team, the abundance of information can cause developers, especially novice software engineers, to spend considerable time in identifying relevant answers and suitable suggested fixes.
This exploratory study aims to understand how novice software engineers direct their efforts and what kinds of information they focus on within a post selected from the results returned in response to a search query on Stack Overflow. The results can be leveraged to improve the Q&A forum interface, guide tools for mining forums, and potentially improve granularity of traceability mappings involving forum posts. We qualitatively analyze the novice software engineers’ perceptions from a survey as well as their annotations of a set of Stack Overflow posts. Our results indicate that novice software engineers pay attention to only 27% of code and 15-21% of text in a Stack Overflow post to understand and determine how to apply the relevant information to their context. Our results also discern the kinds of information prominent in that focus.
Cross-project Defect Prediction Using A Connectivity-based Unsupervised Class...Feng Zhang
Defect prediction on projects with limited historical data has attracted great interest from both researchers and practitioners. Cross-project defect prediction has been the main area of progress by reusing classifiers from other projects. However, existing approaches require some degree of homogeneity (e.g., a similar distribution of metric values) between the training projects and the target project. Satisfying the homogeneity requirement often requires significant effort (currently a very active area of research).
An unsupervised classifier does not require any training data, therefore the heterogeneity challenge is no longer an issue. In this paper, we examine two types of unsupervised classifiers: a) distance-based classifiers (e.g., k-means); and b) connectivity-based classifiers. While distance-based unsupervised classifiers have been previously used in the defect prediction literature with disappointing performance, connectivity-based classifiers have never been explored before in our community.
We compare the performance of unsupervised classifiers versus supervised classifiers using data from 26 projects from three publicly available datasets (i.e., AEEEM, NASA, and PROMISE). In the cross-project setting, our proposed connectivity-based classifier (via spectral clustering) ranks as one of the top classifiers among five widely-used supervised classifiers (i.e., random forest, naive Bayes, logistic regression, decision tree, and logistic model tree) and five unsupervised classifiers (i.e., k-means, partition around medoids, fuzzy C-means, neural-gas, and spectral clustering). In the within-project setting (i.e., models are built and applied on the same project), our spectral classifier ranks in the second tier, while only random forest ranks in the first tier. Hence, connectivity-based unsupervised classifiers offer a viable solution for cross and within project defect predictions.
Opendaylight is a project which promotes the Software Defined Networking.
Officially started on April -8th-2013.
The linux foundation planned an pivotal role in it, but it’s a consortium and multiple tech companies are partnered to led the SDN.
Its based on Eclipse Public License – v 1.0 (EPL).
------------------
Software defined networking is a research area which let a network to program, It also output network control applications, and those applications are to control the network
Example :
A network formed by the openflow enabled switch.
Controller Platform provides the OPEN APIs to program the network.
Controller Applications control the network based on the needs
Partitioning Composite Code Changes to Facilitate Code Review (MSR2015)Sung Kim
Yida's presentation at MSR 2015!
Abstract—Developers expend significant effort on reviewing source code changes, hence the comprehensibility of code changes directly affects development productivity. Our prior study has suggested that composite code changes, which mix multiple development issues together, are typically difficult to review. Unfortunately, our manual inspection of 453 open source code changes reveals a non-trivial occurrence (up to 29%) of such composite changes.
In this paper, we propose a heuristic-based approach to automatically partition composite changes, such that each sub-change in the partition is more cohesive and self-contained. Our quantitative and qualitative evaluation results are promising in demonstrating the potential benefits of our approach for facilitating code review of composite code changes.
This slides show
1. How to obtain code coverage information for Java code
2. What kind of code coverage it is possible to get
3. Is 100% block coverage feasible, is it useful
4. How the code coverage could be used for more than discovering a percentage of uncovered code
The Impact of Test Ownership and Team Structure on the Reliability and Effect...Kim Herzig
Context: Software testing is a crucial step in most software development processes. Testing software is a key component to manage and assess the risk of shipping quality products to customers. But testing is also an expensive process and changes to the system need to be tested thoroughly which may take time. Thus, the quality of a software product depends on the quality of its underlying testing process and on the effectiveness and reliability of individual test cases.
Goal: In this paper, we investigate the impact of the organizational structure of test owners on the reliability and effectiveness of the corresponding test cases. Prior empirical research on organizational structure has focused only on developer activity. We expand the scope of empirical knowledge by assessing the impact of organizational structure on testing activities.
Method: We performed an empirical study on the Windows build verification test suites (BVT) and relate effectiveness and reliability measures of each test run to the complexity and size of the organizational sub-structure that enclose all owners of test cases executed.
Results: Our results show, that organizational structure impacts both test effectiveness and test execution reliability. We are also able to predict effectiveness and reliability with fairly high precision and recall values.
Conclusion: We suggest to review test suites with respect to their organizational composition. As indicated by the results of this study, this would increase the effectiveness and reliability, development speed and developer satisfaction.
More details:
ESEM 2014 presentation for paper "The Impact of Test Ownership and Team Structure on the Reliability and Effectiveness of Quality Test Runs". For more details please see http://dl.acm.org/citation.cfm?id=2652524.2652535&coll=DL&dl=GUIDE&CFID=569962862&CFTOKEN=20804180.
AVATAR : Fixing Semantic Bugs with Fix Patterns of Static Analysis ViolationsDongsun Kim
Fix pattern-based patch generation is a promising direction in Automated Program Repair (APR). Notably, it has been demonstrated to produce more acceptable and correct patches than the patches obtained with mutation operators through genetic programming. The performance of pattern-based APR systems, however, depends on the fix ingredients mined from fix changes in development histories. Unfortunately, collecting a reliable set of bug fixes in repositories can be challenging. In this paper, we propose to investigate the possibility in an APR scenario of leveraging code changes that address violations by static bug detection tools. To that end, we build the AVATAR APR system, which exploits fix patterns of static analysis violations as ingredients for patch generation. Evaluated on the Defects4J benchmark, we show that, assuming a perfect localization of faults, AVATAR can generate correct patches to fix 34/39 bugs. We further find that AVATAR yields performance metrics that are comparable to that of the closely-related approaches in the literature. While AVATAR outperforms many of the state-of-the- art pattern-based APR systems, it is mostly complementary to current approaches. Overall, our study highlights the relevance of static bug finding tools as indirect contributors of fix ingredients for addressing code defects identified with functional test cases.
Who Should Review My Code? A file-location based code-reviewer recommendation approach for modern code review.
This research study is presented at the 22nd IEEE International Conference on Software Analysis, Evolution, and Reengineering (SANER2015)
Find more information and preprint at patanamon.com
Finding Help with Programming Errors: An Exploratory Study of Novice Software...Preetha Chatterjee
Monthly, 50 million users visit Stack Overflow, a popular Q&A forum used by software developers, to share and gather knowledge and help with coding problems. Although Q&A forums serve as a good resource for seeking help from developers beyond the local team, the abundance of information can cause developers, especially novice software engineers, to spend considerable time in identifying relevant answers and suitable suggested fixes.
This exploratory study aims to understand how novice software engineers direct their efforts and what kinds of information they focus on within a post selected from the results returned in response to a search query on Stack Overflow. The results can be leveraged to improve the Q&A forum interface, guide tools for mining forums, and potentially improve granularity of traceability mappings involving forum posts. We qualitatively analyze the novice software engineers’ perceptions from a survey as well as their annotations of a set of Stack Overflow posts. Our results indicate that novice software engineers pay attention to only 27% of code and 15-21% of text in a Stack Overflow post to understand and determine how to apply the relevant information to their context. Our results also discern the kinds of information prominent in that focus.
Cross-project Defect Prediction Using A Connectivity-based Unsupervised Class...Feng Zhang
Defect prediction on projects with limited historical data has attracted great interest from both researchers and practitioners. Cross-project defect prediction has been the main area of progress by reusing classifiers from other projects. However, existing approaches require some degree of homogeneity (e.g., a similar distribution of metric values) between the training projects and the target project. Satisfying the homogeneity requirement often requires significant effort (currently a very active area of research).
An unsupervised classifier does not require any training data, therefore the heterogeneity challenge is no longer an issue. In this paper, we examine two types of unsupervised classifiers: a) distance-based classifiers (e.g., k-means); and b) connectivity-based classifiers. While distance-based unsupervised classifiers have been previously used in the defect prediction literature with disappointing performance, connectivity-based classifiers have never been explored before in our community.
We compare the performance of unsupervised classifiers versus supervised classifiers using data from 26 projects from three publicly available datasets (i.e., AEEEM, NASA, and PROMISE). In the cross-project setting, our proposed connectivity-based classifier (via spectral clustering) ranks as one of the top classifiers among five widely-used supervised classifiers (i.e., random forest, naive Bayes, logistic regression, decision tree, and logistic model tree) and five unsupervised classifiers (i.e., k-means, partition around medoids, fuzzy C-means, neural-gas, and spectral clustering). In the within-project setting (i.e., models are built and applied on the same project), our spectral classifier ranks in the second tier, while only random forest ranks in the first tier. Hence, connectivity-based unsupervised classifiers offer a viable solution for cross and within project defect predictions.
Opendaylight is a project which promotes the Software Defined Networking.
Officially started on April -8th-2013.
The linux foundation planned an pivotal role in it, but it’s a consortium and multiple tech companies are partnered to led the SDN.
Its based on Eclipse Public License – v 1.0 (EPL).
------------------
Software defined networking is a research area which let a network to program, It also output network control applications, and those applications are to control the network
Example :
A network formed by the openflow enabled switch.
Controller Platform provides the OPEN APIs to program the network.
Controller Applications control the network based on the needs
This presentation shows you the basic concept of distributed tracing and Opentracing. And you can see the sample hands-on application (HotROD) of Jaeger
[Download the slide to get the entire talk in the form of presentation note embedded in the ppt] Apache ZooKeeper is the chosen leader in distributed coordination. In this talk, I have explored the atomic elements of Apache ZooKeeper, how it fits everything together and some of its popular use cases. For ZooKeeper simplicity is the key and as a consumer of the API, our imagination enables us to push the limits of the ZooKeeper world.
The monolith to cloud-native, microservices evolution has driven a shift from monitoring to observability. OpenTelemetry, a merger of the OpenTracing and OpenCensus projects, is enabling Observability 2.0. This talk covers the fundamental concepts of observability and then demonstrates how to instrument your applications using the OpenTelemetry libraries.
SDN (Software Defined Networking) ControllerVipin Gupta
SDN is going to redefine networking and cloud world. This is the biggest thing that has happened in networking field in last 30 years. SDN is a New Way to Design, Build and Operate Networks. Here we are discussing about SDN Controllers.
Assistive system for Parkinson's patients - Carnegie Mellon University Spring...KP Kshitij Parashar
The prototype was conceptualized, designed, and developed during Rapid Prototyping of Computer Systems course at Carnegie Mellon University in Spring 2020. I led the Interactions team in the final phase of the course.
Open IoT Made Easy - Introduction to OGC SensorThings APISensorUp
This is the slides presented at FOSS4G N.A. Conference.
This presentation will introduce and demonstrate the OGC SensorThings API. The OGC SensorThings API is a new Open Geospatial Consortium standard that provides an open and unified way to interconnect the Internet of Things (IoT) devices, data, and applications over the Web. Unlike the traditional OGC standards, SensorThings API is very simple and efficient. At the same time, it is also comprehensive and designed to handle complex use cases. It builds on a rich set of proven-working and widely-adopted open standards, such as the OGC Sensor Web Enablement (SWE) standards, including the ISO/OGC Observation and Measurement (O&M) and Sensor Observation Services (SOS). The main difference between the SensorThings API and the OGC SOS is that the SensorThings API is designed specifically for the resource-constrained IoT devices and the Web developer community. As a result, the SensorThings API follows the REST principles, the use of an efficient JSON encoding, and the use of the flexible OASIS OData protocol and URL conventions. We will also demonstrate several real-world applications of the OGC SensorThings API in emergency management and smart cities. In addition to introduce the specification, this talk will also demonstrate an end-to-end IoT application based on the open source libraries of the SensorUp SensorThings platform.
Intelligent agents in ontology-based applicationsinfopapers
F. Stoica, I. Pah, Intelligent agents in ontology-based applications, Proceedings of the 12th WSEAS International Conference on COMPUTERS, Heraklion, Greece, July 23-25, ISBN: 978-960-6766-85-5, ISSN: 1790-5109, pp. 274-279, 2008
Explore seamless Jaeger integration with Spring Cloud for streamlined application monitoring and enhanced performance. Learn how to leverage distributed tracing capabilities for efficient microservices management.
as boundary change the game with second by second application monitoring sometimes this will affect how you apply your problem analysis steps. perhaps things can change
Some Pitfalls with Python and Their Possible Solutions v1.0Yann-Gaël Guéhéneuc
Python is a very popular programming language that comes with many pitfalls. This presentation describes some of these pitfalls, especially when they could trick unsuspecting object-oriented developers. It proposes solutions to these pitfalls, in particular regarding inheritance, which is easily broken because of the implementation choice of Python for explicit delegation, its method resolution order, and its use of the C3 algorithm. It discusses some advantages of using Python, especially regarding meta-classes.
Advice for writing a NSERC Discovery grant application v0.5Yann-Gaël Guéhéneuc
NSERC Discovery grant applications are judged according to four criteria: (1) Excellence of the researcher, (2) Merit of the proposal, (3) Contribution to the training of HQP, and (4) Cost of research. Each criterion has six possible merit indicators: Exceptional, Outstanding, Very strong, Strong, Moderate, and Insufficient. This presentation describes the process from a candidate's point of view and a reviewer's point of view. It discusses funding decisions, including bins and ER vs. ECR. It gives some advice, including graduating PhD students, having a story, and limiting the number of main objectives.
Ptidej Architecture, Design, and Implementation in Action v2.1Yann-Gaël Guéhéneuc
A set of process, architecture, design, and implementation patterns from a real, large program, the Ptidej Tool Suite. This set shows concrete problems and their solutions in Java. It includes: Be A Profiler, Tests as Documentation, Multi-layered Architecture, Proxy Console, Proxy Disk, Hidden Language, Internal Observer, Run-time Deprecation, String Parsimony, Object Identity, Object Address, Final Construction, StringBuffer as Positioning Element.
Examples of (bad) consequences of a lack of software quality and some solutions. This presentation presents some examples of (bad) consequences of a lack of software quality, in particular how poor software quality led to the direct deaths of 89 people. It then provides some background on software quality, especially the concept of Quality Without a Name. It then discusses many principles, their usefulness, and their positive consequences on software quality. Some of these principles are well-known in object-oriented programming while many others are taken from the book 97 Programmers. They include: abstraction, encapsulation, inheritance, types, polymorphism, SOLID, GRASP, YAGNI, KISS, DRY, Do Not Reinvent the Wheel, Law of Demeter, Beware of Assumptions, Deletable Code, coding with reason, and functional programming. They pertain to dependencies, domains, and tools.
(In details: Beautify is Simplicity, The Boy Scout Rule, You Gotta Care About the Code, The Longevity of Interim Solutions, Beware the Share, Encapsulate Behaviour not Just State, Single Responsibility Principle, WET Dilutes Performance Bottlenecks, Convenience Is Not an -ility, Code in the Language of the Domain, Comment Only What the Code Cannot Say, Distinguish Business Exception from Technical, Prefer Domain-specific Types to Primitive Types, Automate Your Coding Standards, Code Layout Matters, Before You Refactor, Improve Code by Removing It, Put the Mouse Down and Step Away from the Keyboard)
Some Pitfalls with Python and Their Possible Solutions v0.9Yann-Gaël Guéhéneuc
Python is a very popular programming language that comes with many pitfalls. This presentation describes some of these pitfalls, especially when they could trick unsuspecting object-oriented developers. It proposes solutions to these pitfalls, in particular regarding inheritance, which is easily broken because of the implementation choice of Python for explicit delegation, its method resolution order, and its use of the C3 algorithm. It discusses some advantages of using Python, especially regarding meta-classes.
An Explanation of the Unicode, the Text Encoding Standard, Its Usages and Imp...Yann-Gaël Guéhéneuc
Unicode is currently the world standard for encoding text. It supports all of the world's major writing systems. With its version 15.1 of 2023/09/12, it defines 149,813 characters and 161 scripts. This presentation starts with the, seemingly, simple example of the polar bear emoji. It then defines the key terms of any such standard. It then asks how a software system can render orthographic characters into glyphs, i.e., to render characters into (combined) glyphs. It introduces the concept of abstract characters and describes a brief history of encoding standards, from ASCII to Unicode. It shows how, by adding one level of indirection, the Unicode standard answers this question. It then presents code examples to display text written in Unicode: HarfBuzz (for shaping) and FreeType (for rendering).
An Explanation of the Halting Problem and Its ConsequencesYann-Gaël Guéhéneuc
The halting problem is an important, famous, and consequential problem in computer science. It is about writing a program that decides if another problem will stop. There is no general solution to this problem, which shows that such a problem is undecidable, with important consequences: for example, it is not possible to write tests that would exhaustively test entirely an arbitrary program. This presentation was written in collaboration with <a href="https://www.iro.umontreal.ca/~hahn/">Gena Hahn</a>.
A presentation summarising FPGAs, their history, their benefits, and showing how to program them. It provides some historical background on the development of computers, from the Difference Engine to the Intel 4004 to the AMD Ryzen Threadripper PRO 3995WX. It shows how the number of transistors increased dramatically but also how this increase led to more complexity and more bugs. It then introduces Field-programmable gate arrays (FPGA) as an alternative. It then presents how to program such FPGA using data-flow graphs. It discusses some tools (Yosys, NextPnR, and IceStorm) and illustrates them with a typical "Hello World" (i.e., blinking an LED) using Cygwin on Windows 10.
A set of brief presentations of some of the women and men who made the history of computer science and software engineering.
- 1936: Alan Turing
- 1948: Claude Elwood Shannon
- 1950: Grace Murray Hopper
- 1960: John McCarthy
- 1966: Frances E. Allen
- 1967: Ole-Johan Dahl
- 1967: Kristen Nygaard
- 1969: Charles A. R. Hoare
- 1970: Edgar F. Codd
- 1972: Dave Parnas
- 1974: Manny Lehman
- 1975: Frederick Brooks
- 1986: Edward Yourdon
- 1987: Barbara Liskov
- 1994: Erich Gamma
- 1997: Grady Booch
- 2001: Butler Lampson
A tutorial on the history, use, and caveats of Java generics. Using the simple example of an interface for sort algorithms, the tutorial presents the history of generics and describes the problems being solved by generics. It also provides definitions, and examples in Java and C++, and discusses Duck Typing. It then describes two scenarios: (1) Scenario 1: you want to enforce type safety for containers and remove the need for typecasts when using these containers and (2) Scenario 2: you want to build generic algorithms that work on several types of (possibly unrelated) things. It also summarises caveats with generics, in particular type erasure.
A tutorial on reflection, with a particular emphasis on Java, with a comparison with C++, Python, and Smalltalk. It describes different scenarios in which reflection is useful, a brief history of reflection and MOPs, a comparison with C++, Python, and Smalltalk, and some particulars about Java. The source code of the examples in Java (Eclipse project), Smalltalk (Squeak image v3.10.6), Python (Eclipse project), and C++ (Eclipse projects and Visual Studio solution) are available. (C++ Eclipse projects require Mirror.) Big thanks to Matúš Chochlík and Marcus Denker for their kind and precious help with C++ and Smalltalk.
The tutorial focuses on four common problems:
- Avoid using instanceof when code must bypass the compiler and virtual machine’s choice of the method to call.
- Create external, user-defined pieces of code loaded, used, and unloaded at run-time.
- Translate data structures or object states into a format that can be stored (file, network...).
- Monitor the execution of a program to understand its behaviour, and measure its space and time complexity.
It shows working examples of Java, Smalltalk, Python, and C++ code solving the four common problems through four scenarios:
- Scenario 1: invoke an arbitrary method on an object (see the problems with instanceof and plugins).
- Scenario 2: access the complete (including private) state of an object (see the problem with serialisation).
- Scenario 3: count the number of instances of a class created at runtime (see the problem with debugging/profiling).
- Scenario 4: patch the method of a class to change its behaviour (see the problem with patching).
It also discusses the different kinds of interconnections among objects that are available in common programming languages (linking, forking, subclassing, inter-process communication, and dynamic loading/invoking), a bit of theory about reflection, and specifically the class-loading mechanism of Java.
REST APIs are nowadays the de-facto standard for Web applications. However, as more systems and services adopt the REST architectural style, many problems arise regularly. To avoid these repetitive problems, developers should follow good practices and avoid bad practices. Thus, research on good and bad practices and how to design a simple but effective REST API are essential. Yet, to the best of our knowledge, there are only a few concrete solutions to recurring REST API practices, like “API Versioning”. There are works on defining or detecting some practices, but not on solutions to the practices. We present the most up-to-date list of REST API practices and formalize them in the form of REST API (anti)patterns. We validate our design (anti)patterns with a survey and interviews of 55 developers.
May Marketo Masterclass, London MUG May 22 2024.pdfAdele Miller
Can't make Adobe Summit in Vegas? No sweat because the EMEA Marketo Engage Champions are coming to London to share their Summit sessions, insights and more!
This is a MUG with a twist you don't want to miss.
Top Features to Include in Your Winzo Clone App for Business Growth (4).pptxrickgrimesss22
Discover the essential features to incorporate in your Winzo clone app to boost business growth, enhance user engagement, and drive revenue. Learn how to create a compelling gaming experience that stands out in the competitive market.
How Recreation Management Software Can Streamline Your Operations.pptxwottaspaceseo
Recreation management software streamlines operations by automating key tasks such as scheduling, registration, and payment processing, reducing manual workload and errors. It provides centralized management of facilities, classes, and events, ensuring efficient resource allocation and facility usage. The software offers user-friendly online portals for easy access to bookings and program information, enhancing customer experience. Real-time reporting and data analytics deliver insights into attendance and preferences, aiding in strategic decision-making. Additionally, effective communication tools keep participants and staff informed with timely updates. Overall, recreation management software enhances efficiency, improves service delivery, and boosts customer satisfaction.
First Steps with Globus Compute Multi-User EndpointsGlobus
In this presentation we will share our experiences around getting started with the Globus Compute multi-user endpoint. Working with the Pharmacology group at the University of Auckland, we have previously written an application using Globus Compute that can offload computationally expensive steps in the researcher's workflows, which they wish to manage from their familiar Windows environments, onto the NeSI (New Zealand eScience Infrastructure) cluster. Some of the challenges we have encountered were that each researcher had to set up and manage their own single-user globus compute endpoint and that the workloads had varying resource requirements (CPUs, memory and wall time) between different runs. We hope that the multi-user endpoint will help to address these challenges and share an update on our progress here.
Unleash Unlimited Potential with One-Time Purchase
BoxLang is more than just a language; it's a community. By choosing a Visionary License, you're not just investing in your success, you're actively contributing to the ongoing development and support of BoxLang.
TROUBLESHOOTING 9 TYPES OF OUTOFMEMORYERRORTier1 app
Even though at surface level ‘java.lang.OutOfMemoryError’ appears as one single error; underlyingly there are 9 types of OutOfMemoryError. Each type of OutOfMemoryError has different causes, diagnosis approaches and solutions. This session equips you with the knowledge, tools, and techniques needed to troubleshoot and conquer OutOfMemoryError in all its forms, ensuring smoother, more efficient Java applications.
Cyaniclab : Software Development Agency Portfolio.pdfCyanic lab
CyanicLab, an offshore custom software development company based in Sweden,India, Finland, is your go-to partner for startup development and innovative web design solutions. Our expert team specializes in crafting cutting-edge software tailored to meet the unique needs of startups and established enterprises alike. From conceptualization to execution, we offer comprehensive services including web and mobile app development, UI/UX design, and ongoing software maintenance. Ready to elevate your business? Contact CyanicLab today and let us propel your vision to success with our top-notch IT solutions.
Into the Box Keynote Day 2: Unveiling amazing updates and announcements for modern CFML developers! Get ready for exciting releases and updates on Ortus tools and products. Stay tuned for cutting-edge innovations designed to boost your productivity.
top nidhi software solution freedownloadvrstrong314
This presentation emphasizes the importance of data security and legal compliance for Nidhi companies in India. It highlights how online Nidhi software solutions, like Vector Nidhi Software, offer advanced features tailored to these needs. Key aspects include encryption, access controls, and audit trails to ensure data security. The software complies with regulatory guidelines from the MCA and RBI and adheres to Nidhi Rules, 2014. With customizable, user-friendly interfaces and real-time features, these Nidhi software solutions enhance efficiency, support growth, and provide exceptional member services. The presentation concludes with contact information for further inquiries.
A Comprehensive Look at Generative AI in Retail App Testing.pdfkalichargn70th171
Traditional software testing methods are being challenged in retail, where customer expectations and technological advancements continually shape the landscape. Enter generative AI—a transformative subset of artificial intelligence technologies poised to revolutionize software testing.
Gamify Your Mind; The Secret Sauce to Delivering Success, Continuously Improv...Shahin Sheidaei
Games are powerful teaching tools, fostering hands-on engagement and fun. But they require careful consideration to succeed. Join me to explore factors in running and selecting games, ensuring they serve as effective teaching tools. Learn to maintain focus on learning objectives while playing, and how to measure the ROI of gaming in education. Discover strategies for pitching gaming to leadership. This session offers insights, tips, and examples for coaches, team leads, and enterprise leaders seeking to teach from simple to complex concepts.
Paketo Buildpacks : la meilleure façon de construire des images OCI? DevopsDa...Anthony Dahanne
Les Buildpacks existent depuis plus de 10 ans ! D’abord, ils étaient utilisés pour détecter et construire une application avant de la déployer sur certains PaaS. Ensuite, nous avons pu créer des images Docker (OCI) avec leur dernière génération, les Cloud Native Buildpacks (CNCF en incubation). Sont-ils une bonne alternative au Dockerfile ? Que sont les buildpacks Paketo ? Quelles communautés les soutiennent et comment ?
Venez le découvrir lors de cette session ignite
Prosigns: Transforming Business with Tailored Technology SolutionsProsigns
Unlocking Business Potential: Tailored Technology Solutions by Prosigns
Discover how Prosigns, a leading technology solutions provider, partners with businesses to drive innovation and success. Our presentation showcases our comprehensive range of services, including custom software development, web and mobile app development, AI & ML solutions, blockchain integration, DevOps services, and Microsoft Dynamics 365 support.
Custom Software Development: Prosigns specializes in creating bespoke software solutions that cater to your unique business needs. Our team of experts works closely with you to understand your requirements and deliver tailor-made software that enhances efficiency and drives growth.
Web and Mobile App Development: From responsive websites to intuitive mobile applications, Prosigns develops cutting-edge solutions that engage users and deliver seamless experiences across devices.
AI & ML Solutions: Harnessing the power of Artificial Intelligence and Machine Learning, Prosigns provides smart solutions that automate processes, provide valuable insights, and drive informed decision-making.
Blockchain Integration: Prosigns offers comprehensive blockchain solutions, including development, integration, and consulting services, enabling businesses to leverage blockchain technology for enhanced security, transparency, and efficiency.
DevOps Services: Prosigns' DevOps services streamline development and operations processes, ensuring faster and more reliable software delivery through automation and continuous integration.
Microsoft Dynamics 365 Support: Prosigns provides comprehensive support and maintenance services for Microsoft Dynamics 365, ensuring your system is always up-to-date, secure, and running smoothly.
Learn how our collaborative approach and dedication to excellence help businesses achieve their goals and stay ahead in today's digital landscape. From concept to deployment, Prosigns is your trusted partner for transforming ideas into reality and unlocking the full potential of your business.
Join us on a journey of innovation and growth. Let's partner for success with Prosigns.
Experience our free, in-depth three-part Tendenci Platform Corporate Membership Management workshop series! In Session 1 on May 14th, 2024, we began with an Introduction and Setup, mastering the configuration of your Corporate Membership Module settings to establish membership types, applications, and more. Then, on May 16th, 2024, in Session 2, we focused on binding individual members to a Corporate Membership and Corporate Reps, teaching you how to add individual members and assign Corporate Representatives to manage dues, renewals, and associated members. Finally, on May 28th, 2024, in Session 3, we covered questions and concerns, addressing any queries or issues you may have.
For more Tendenci AMS events, check out www.tendenci.com/events
Developing Distributed High-performance Computing Capabilities of an Open Sci...Globus
COVID-19 had an unprecedented impact on scientific collaboration. The pandemic and its broad response from the scientific community has forged new relationships among public health practitioners, mathematical modelers, and scientific computing specialists, while revealing critical gaps in exploiting advanced computing systems to support urgent decision making. Informed by our team’s work in applying high-performance computing in support of public health decision makers during the COVID-19 pandemic, we present how Globus technologies are enabling the development of an open science platform for robust epidemic analysis, with the goal of collaborative, secure, distributed, on-demand, and fast time-to-solution analyses to support public health.
Innovating Inference - Remote Triggering of Large Language Models on HPC Clus...Globus
Large Language Models (LLMs) are currently the center of attention in the tech world, particularly for their potential to advance research. In this presentation, we'll explore a straightforward and effective method for quickly initiating inference runs on supercomputers using the vLLM tool with Globus Compute, specifically on the Polaris system at ALCF. We'll begin by briefly discussing the popularity and applications of LLMs in various fields. Following this, we will introduce the vLLM tool, and explain how it integrates with Globus Compute to efficiently manage LLM operations on Polaris. Attendees will learn the practical aspects of setting up and remotely triggering LLMs from local machines, focusing on ease of use and efficiency. This talk is ideal for researchers and practitioners looking to leverage the power of LLMs in their work, offering a clear guide to harnessing supercomputing resources for quick and effective LLM inference.
1. Analyzing and Visualizing Projects and
their Relations in Software Ecosystems
NIER/TD - Present at IEEE VISSOFT 2021
By Van Tuan Tran, Cheng Cheng, Fabio Petrillo and Yann-Gaël Guéhéneuc
4. 1 - Introduction - Problems
There are many software ecosystems:
● GitHub (all sorts of software)
● NPMJS (JavaScript libraries)
● Python Package Index (PyPI)
● Apache Maven Repository (Java libraries)
● Eclipse Foundation open source projects
5. 1 - Introduction - Problems
How to help developers understand, navigate between projects
in related/alternative ecosystems?
How to help developers understand, navigate
the Eclipse IoT ecosystem
6. 1 - Introduction - Goals
Goal 1: Summarize the documentation into word-cloud
KEYPLE
Several ‘Reader Observers’ could be registered to an Observable
Reader. In case of SE insertion / match / removal, the observable
reader notifies sequentially the registered observers with the
corresponding reader event. The observable reader could be a
blocking API, the thread managing the issuance of the plugin event
could wait the acknowledge of the notified observers.
An observable reader has the capability to be set with a ‘Default
Selections Request’: in this case when a SE is inserted in the
reader, the reader will try to operate the configured default
selections. If a selection successfully matches with the SE, instead
to simply notify the insertion of SE, the observable reader will
notify about a successful selection with a SE application.
If the notification mode is defined as ‘always’, then in case of SE
insertion, the observable reader will notify a SE matched reader
event in case of successful selection, or a simple SE inserted
reader event if not.
If the notification mode is defined as ‘matched only’, then in case
of SE insertion, simple SE inserted reader events are not notified.
When the processing of an inserted or matched SE is finished, a
reader observer must release the logical channel with the Secure
Element, in order to prepare the observable reader to detect the
removal of the SE.
Observable reader states
An observable reader is active only when at least one reader
observer is registered, and if the start of the detection has been
requested. When active, an observable read could switch between
7. 1 - Introduction - Goals
Goal 2: Find and map relationships between word-clouds
?