A hexagonal tiling with reflections of angle π/6 is recognized as the dihedral group D6. After identifying 3 different kaleidoscopic points, the tiling is found to be from the wallpaper group p6m. An equilateral triangle tiling with a 3-fold rotational symmetry of 2π/3 is also identified, belonging to the wallpaper group p31m after determining an independent 3-fold gyration point. The document further discusses extensions to Coxeter polygons, orbifolds, frieze groups, and classifications of different brick wall patterns.
IOSR Journal of Mathematics(IOSR-JM) is an open access international journal that provides rapid publication (within a month) of articles in all areas of mathemetics and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mathematics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
The large-scale nebular pattern of a superwind binary in an eccentric orbitSérgio Sacani
Preplanetary nebulae and planetary nebulae are evolved,
mass-losing stellar objects that show a wide variety of morphologies.
Many of these nebulae consist of outer structures
that are nearly spherical (spiral/shell/arc/halo) and inner
structures that are highly asymmetric (bipolar/multipolar)1,2.
The coexistence of such geometrically distinct structures is
enigmatic because it hints at the simultaneous presence of
both wide and close binary interactions, a phenomenon that
has been attributed to stellar binary systems with eccentric
orbits3. Here, we report high-resolution molecular line observations
of the circumstellar spiral-shell pattern of AFGL 3068,
an asymptotic giant branch star transitioning to the preplanetary
nebula phase. The observations clearly reveal that the
dynamics of the mass loss is influenced by the presence of an
eccentric-orbit binary. This quintessential object opens a window
on the nature of deeply embedded binary stars through
the circumstellar spiral-shell patterns that reside at distances
of several thousand au from the stars.
Learn Online Courses of Subject Engineering Mechanics of First Year Engineering. Clear the Concepts of Engineering Mechanics Through Video Lectures and PDF Notes. Visit us: https://ekeeda.com/streamdetails/subject/Engineering-Mechanics
IOSR Journal of Mathematics(IOSR-JM) is an open access international journal that provides rapid publication (within a month) of articles in all areas of mathemetics and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mathematics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
The large-scale nebular pattern of a superwind binary in an eccentric orbitSérgio Sacani
Preplanetary nebulae and planetary nebulae are evolved,
mass-losing stellar objects that show a wide variety of morphologies.
Many of these nebulae consist of outer structures
that are nearly spherical (spiral/shell/arc/halo) and inner
structures that are highly asymmetric (bipolar/multipolar)1,2.
The coexistence of such geometrically distinct structures is
enigmatic because it hints at the simultaneous presence of
both wide and close binary interactions, a phenomenon that
has been attributed to stellar binary systems with eccentric
orbits3. Here, we report high-resolution molecular line observations
of the circumstellar spiral-shell pattern of AFGL 3068,
an asymptotic giant branch star transitioning to the preplanetary
nebula phase. The observations clearly reveal that the
dynamics of the mass loss is influenced by the presence of an
eccentric-orbit binary. This quintessential object opens a window
on the nature of deeply embedded binary stars through
the circumstellar spiral-shell patterns that reside at distances
of several thousand au from the stars.
Learn Online Courses of Subject Engineering Mechanics of First Year Engineering. Clear the Concepts of Engineering Mechanics Through Video Lectures and PDF Notes. Visit us: https://ekeeda.com/streamdetails/subject/Engineering-Mechanics
IEEE CEC 2013 Tutorial on Geometry of Evolutionary AlgorithmsAlbertoMoraglio
Slides for my tutorial on the geometry of evolutionary algorithms at IEEE CEC 2013 conference (see http://www.cec2013.org/?q=tutorial_geometry).
It is about a geometric theory which unifies Evolutionary Algorithms across representations and has been used for the principled design of new successful search algorithms and for their rigorous theoretical analysis across representations.
Analysis of soil arching effect with different cross-section anti-slide pileIJERA Editor
Although the knowledge of soil-arching effect of anti-slide pile become common, the analysis of soil-arching effect with different cross-section anti-slide pile is little. Therefore,this paper choose three typical cross-section piles (rectangular, square, circular), Then do some study about the Mechanism of mechanism, frictional arch and end bearing arch of three cross-section piles and the form of soil arch with different cross-section and the soil arch zone under same condition in order to define the best cross-section, The result show that rectangular section pile and square section pile are composed by frictional arch and end bearing arch, while circular section pile is made up by united arch, finally rectangular section pile has a more effective retaining effect than square section pile and circular section pile through compared soil arch zone with three type section piles.
Simulation Analysis of Single Column Plate Phononic Crystals At Low Frequency...IJRESJOURNAL
ABSTRACT: In this paper, locally resonant single side column plate phononic crystals are studied. Based on the finite element method, the material properties of the scatterer and the effect of the plate shape on the band gap characteristics of the locally resonant single side column plate phononic crystals are calculated and analyzed by use of the multi-physics software COMSOL. Based on the analysis on the effects of the density, the elastic modulus, the poisson ratio and the shape of the scatterer, it is shown that the density, the elastic modulus and the shape of the scatterer can obviously affect the band gaps of phononiccrystals .
Extra ways to see: An Artist's Guide to Map Operationsjmallos
Map operations convert one subdivision of a surface into another, thereby suggesting alternate ways to decorate or build the surface. Over twenty map operations are described in a visual way by their truchet tiles. Paper presented at the 2011 ISAMA Chicago conference.
IEEE CEC 2013 Tutorial on Geometry of Evolutionary AlgorithmsAlbertoMoraglio
Slides for my tutorial on the geometry of evolutionary algorithms at IEEE CEC 2013 conference (see http://www.cec2013.org/?q=tutorial_geometry).
It is about a geometric theory which unifies Evolutionary Algorithms across representations and has been used for the principled design of new successful search algorithms and for their rigorous theoretical analysis across representations.
Analysis of soil arching effect with different cross-section anti-slide pileIJERA Editor
Although the knowledge of soil-arching effect of anti-slide pile become common, the analysis of soil-arching effect with different cross-section anti-slide pile is little. Therefore,this paper choose three typical cross-section piles (rectangular, square, circular), Then do some study about the Mechanism of mechanism, frictional arch and end bearing arch of three cross-section piles and the form of soil arch with different cross-section and the soil arch zone under same condition in order to define the best cross-section, The result show that rectangular section pile and square section pile are composed by frictional arch and end bearing arch, while circular section pile is made up by united arch, finally rectangular section pile has a more effective retaining effect than square section pile and circular section pile through compared soil arch zone with three type section piles.
Simulation Analysis of Single Column Plate Phononic Crystals At Low Frequency...IJRESJOURNAL
ABSTRACT: In this paper, locally resonant single side column plate phononic crystals are studied. Based on the finite element method, the material properties of the scatterer and the effect of the plate shape on the band gap characteristics of the locally resonant single side column plate phononic crystals are calculated and analyzed by use of the multi-physics software COMSOL. Based on the analysis on the effects of the density, the elastic modulus, the poisson ratio and the shape of the scatterer, it is shown that the density, the elastic modulus and the shape of the scatterer can obviously affect the band gaps of phononiccrystals .
Extra ways to see: An Artist's Guide to Map Operationsjmallos
Map operations convert one subdivision of a surface into another, thereby suggesting alternate ways to decorate or build the surface. Over twenty map operations are described in a visual way by their truchet tiles. Paper presented at the 2011 ISAMA Chicago conference.
Chatty Kathy - UNC Bootcamp Final Project Presentation - Final Version - 5.23...John Andrews
SlideShare Description for "Chatty Kathy - UNC Bootcamp Final Project Presentation"
Title: Chatty Kathy: Enhancing Physical Activity Among Older Adults
Description:
Discover how Chatty Kathy, an innovative project developed at the UNC Bootcamp, aims to tackle the challenge of low physical activity among older adults. Our AI-driven solution uses peer interaction to boost and sustain exercise levels, significantly improving health outcomes. This presentation covers our problem statement, the rationale behind Chatty Kathy, synthetic data and persona creation, model performance metrics, a visual demonstration of the project, and potential future developments. Join us for an insightful Q&A session to explore the potential of this groundbreaking project.
Project Team: Jay Requarth, Jana Avery, John Andrews, Dr. Dick Davis II, Nee Buntoum, Nam Yeongjin & Mat Nicholas
Data Centers - Striving Within A Narrow Range - Research Report - MCG - May 2...pchutichetpong
M Capital Group (“MCG”) expects to see demand and the changing evolution of supply, facilitated through institutional investment rotation out of offices and into work from home (“WFH”), while the ever-expanding need for data storage as global internet usage expands, with experts predicting 5.3 billion users by 2023. These market factors will be underpinned by technological changes, such as progressing cloud services and edge sites, allowing the industry to see strong expected annual growth of 13% over the next 4 years.
Whilst competitive headwinds remain, represented through the recent second bankruptcy filing of Sungard, which blames “COVID-19 and other macroeconomic trends including delayed customer spending decisions, insourcing and reductions in IT spending, energy inflation and reduction in demand for certain services”, the industry has seen key adjustments, where MCG believes that engineering cost management and technological innovation will be paramount to success.
MCG reports that the more favorable market conditions expected over the next few years, helped by the winding down of pandemic restrictions and a hybrid working environment will be driving market momentum forward. The continuous injection of capital by alternative investment firms, as well as the growing infrastructural investment from cloud service providers and social media companies, whose revenues are expected to grow over 3.6x larger by value in 2026, will likely help propel center provision and innovation. These factors paint a promising picture for the industry players that offset rising input costs and adapt to new technologies.
According to M Capital Group: “Specifically, the long-term cost-saving opportunities available from the rise of remote managing will likely aid value growth for the industry. Through margin optimization and further availability of capital for reinvestment, strong players will maintain their competitive foothold, while weaker players exit the market to balance supply and demand.”
The Building Blocks of QuestDB, a Time Series Databasejavier ramirez
Talk Delivered at Valencia Codes Meetup 2024-06.
Traditionally, databases have treated timestamps just as another data type. However, when performing real-time analytics, timestamps should be first class citizens and we need rich time semantics to get the most out of our data. We also need to deal with ever growing datasets while keeping performant, which is as fun as it sounds.
It is no wonder time-series databases are now more popular than ever before. Join me in this session to learn about the internal architecture and building blocks of QuestDB, an open source time-series database designed for speed. We will also review a history of some of the changes we have gone over the past two years to deal with late and unordered data, non-blocking writes, read-replicas, or faster batch ingestion.
06-04-2024 - NYC Tech Week - Discussion on Vector Databases, Unstructured Data and AI
Discussion on Vector Databases, Unstructured Data and AI
https://www.meetup.com/unstructured-data-meetup-new-york/
This meetup is for people working in unstructured data. Speakers will come present about related topics such as vector databases, LLMs, and managing data at scale. The intended audience of this group includes roles like machine learning engineers, data scientists, data engineers, software engineers, and PMs.This meetup was formerly Milvus Meetup, and is sponsored by Zilliz maintainers of Milvus.