About the role

Arm is looking for a remarkable system performance modeling and analysis architect to join the

Worldwide system IP Performance team. You will work closely with IP and systems teams across Arm to help define high-performance systems incorporating current and next generation Arm Processors, scalable coherent interconnects, and high-bandwidth memory controllers. This is an unusual opportunity to work through the brilliance of our Arm team members.

 What will you be accountable for? 

• Modeling, analysis, and workload projections: You will identify new performance features and system performance bottlenecks using performance and RTL models starting from product definition phase through release.

• You will generate and correlate projections and scaling factors for appropriate workloads for partners to help both external and internal customers identify optimal design points of a system. 

• Partner engagement and mentorship: You will engage with internal and external partners through all stages of the product in establishing high confidence in Arm IP and system level performance. You will collaborate closely with other teams at Arm including mentoring and encouraging junior engineers to deliver performance collateral through analysis for evolving new usages and workloads.
• System model configurations. You will build and maintain consistent system model configurations for use by our partners that deliver the best performance. 

Introduction

Arm architects the pervasive intelligence that is transforming our daily experience. Arm-based chips and device architectures orchestrate the performance of the technology that makes modern life possible.Arm designs the technology which is at the heart of advanced digital products, from wireless, networking and consumer entertainment solutions to imaging, automotive, security and storage devices. Arm improves people’s lives by enabling the intelligence in affordable, easy-to-use electronic products that transform the way we live and work. We work in partnership with a global network of leading technology companies which are using our smart low-power technology. Together we are shaping the future of a better world.

Today, We are well recognized as the market leader in the CPU and System IP industry and this has been achieved by consistently delivering reliable and high-quality IP products. The cost of design and manufacturing and that warrants “right first time” approach for all IP and System products by our partners. Time-to-market is critical for our partners to deal with fierce competition in the marketplace, being first would enable them to get premium value from the end products. In this context, Design Verification of CPU IPs is a big challenge requiring an engineering skillset that is both broad and deep.

We are an Equal Opportunity Employer and do not discriminate against any employee or applicant for employment because of race, color, sex, age, national origin, religion, sexual orientation, gender identity, status as a veteran, and basis of disability or any other federal, state or local protected class.

Are you highly inquisitive with a committed approach to improving performance? Do you want to make an impact on the future of Smartphone and Laptop computing?
We are looking for experienced engineers with a strong understanding of computer architecture and performance analysis to investigate emerging use-cases such as AR and ML to help define future IP from Arm and our partners.

About the role

As a senior member of the engineering team within the Client Line of Business you will lead performance analysis investigations, producing data-led analysis and conclusions which help define requirements for future Client compute solutions.
Client computing devices are expected to deliver incredible performance across an increasing range of diverse use cases including AAA quality gaming, compelling AR experiences and applications with deeply embedded AI and ML.
You will use your knowledge of hardware and software to build a deep understanding of critical use cases. You will look at how workloads utilise available compute and memory resources, how advancements in SoC topologies, processor design and software will help improve user experience.

We are looking for an enthusiastic software developer with understanding of Java or modern C++, to join the Arm Mobile Studio team.

The role involves collaborating with highly motivated developers from different backgrounds, and customers throughout the world, to craft the next generation of our performance analysis tools for Arm CPUs and Mali GPUs. As part of this team, you would help create new features, maintain existing ones, and support the engineering infrastructure for build, test, and continuous integration. We also help to support both internal and external customers, and contribute to our developer documentation, developer website, and community forums.

We are growing the team to help deliver features that support the full breadth of Arm's product portfolio. Our tools are used to optimize the latest smart cars, drones, mobile games, and machine learning applications, your ideas will make a difference and help to bring world-beating products to market.

Please note this is a Fixed Term Contract ending Sept 2021

We are looking for a highly skilled, technically capable senior software engineer to join the team of Arm Forge at Warwick. You will be passionate about making a difference through building great quality products.

As an experienced developer, you’ll have a methodical approach to debugging and performance analysis and understand how developers will use our tools to achieve their objectives. Working as part of a team of C++ software engineers based in Warwick you will help to develop the Arm Forge Debug and Profiling tools.

Arm Forge is used by developers to increase software performance or fix software bugs from single Linux servers right up to the largest supercomputer on the planet.  Our tools span a wide range of use cases; from C/C++/Python developers writing multithreaded server applications or ML and data analysis applications, to C/C++/Fortran/Python HPC developers scaling to millions of cores.

To learn more about our group and the products please check https://developer.arm.com/hpc.

Main Duties

We are looking for a highly skilled and motivated senior software engineer who is passionate about producing quality valuable software to join our elite team based in Warwick.

• Responsible for developing quality functionality on schedule, including specification, design, development, documentation and test.
• Drive forward major features or improvements and increase quality into the product.
• Expected to integrate with existing ARM process and infrastructure where possible and use your experience to introduce new processes where required.

About the role

We are searching for a talented Software Engineer to join the Raven Random Test Generator team at the Arm Austin Design Center. As a Software Engineer on our team, you will help develop and deploy our core product, Raven – a powerful dynamic random test generator written in C++ that has been used extensively by CPU design teams throughout the Arm ecosystem for more than a decade. You will work in close collaboration with senior CPU verification engineers both inside and outside of Arm to define and develop new ways of achieving their verification goals.

The Raven team is part of Arm’s Architecture & Technology Group – the part of Arm that develops architectural specifications and technologies needed to support Arm’s partners in successful development of processors conforming to the architecture. In addition to our product for CPU verification groups, we also collaborate early and frequently with Arm’s architects to help ensure that new architectures can be verified effectively.

As a member of our team, your day-to-day work will consist primarily of design and development of our C++ tool and supporting customers and coworkers to solve verification problems. This work relies heavily upon a strong knowledge of computer architecture concepts and ability to read and understand new architectural specifications. If you are looking for a role that combines hardware and software skills in an environment where you can make a significant contribution and collaborate with a talented team that creates leading-edge verification technologies and methodologies, we’re looking forward to hearing from you!

We have exciting opportunities in the CPU group, where you will be part of a highly motivated team that helps define new generations of mainstream processors.

You will have real responsibilities from day one, and you will get support and mentorship from specialists that will help you succeed and develop your career. Through teamwork, training, and dedication to personal development, we strive to help everyone mature into a specialist in the field.

You will work in a multi-site, multi-cultural environment and will have the opportunity to work on different projects.

What will you be accountable for?

• You will contribute to the definition of the next generation of Arm’s IP products by enabling analysis of new applications and benchmarks, and by proposing new insights on methodologies that push the state of the art in workload analysis, characterization and capture.
• Together with marketing, technical leads, and partners we will align on applications that will represent market requirements for future products.
• You will propose, develop and maintain innovative ways of making relevant workloads suitable for sophisticated simulation and emulation platforms, targeting the latest architectural features.

We are looking for a talented and creative Open Source Coordinator who will support the Open Source Software organization.  The ideal candidate will bring strong detail oriented execution and organizational skills to help drive the impact of Arm in the Open Source community.

 About the role

• The position reports to the Director Open Source Communities. The position has working relationships with, but not limited: Software Engineering groups, Global Event Teams, Enterprise Marketing, Legal, Procurement, Finance, Business Line Groups, IT, as well as external service providers.
• Responsible for coordinating activities within the Open Source Office and supporting various aspects of events (including industry trade shows, special events and conferences) and multifaceted projects.
• Some knowledge in project management is highly beneficial
• Working with globally dispersed teams, engaging engineering leads to drive Arm’s Open Source presence at a variety of events from large commercial to grass root community

About the role

The Central Technology Team within Arm develops key technologies which will form the foundation of future products.
You will join a multinational, dynamic, collaborative and highly motivated Graphics team in Central Technology to help craft the direction of our world leading Mali™ Graphics products. The Mali™ Graphics Processor is the #1 shipping GPU.

You will need to have architecture and hardware/software development skills, in addition to being able to think creatively. In this role you can expect to be a technical lead where your ideas will make a difference and enable you to make your mark delivering industry leading GPU IP.

Your job responsibilities will be diverse and may include architecture, technology research, hands-on prototyping and experimental investigations, participating in key industry consortium's, engaging with product groups, working closely together with the engineering team, and taking part in partner and customer engagements.

Together with our world-leading architects you will:

• Design and develop the Mali™ graphics architecture for the latest graphics APIs, providing new technologies for products in new and existing markets.
• Perform high level performance modelling and analysis of graphics hardware features, applications, benchmarks and games.
• Develop and improve tools for architectural exploration and performance analysis.
• Understand and analyse system level architectural trade-offs (including hardware, memory systems and system s/w).
• Collaborate with the Arm engineering team to see your ideas delivered into products.

About the Role
We are looking for a passionate story teller. A person who combines an astute business mind with a knowledge and thirst to know more about how technology is shaping our connected world. You will need to engage with our C-suite audience, win their confidence and help shape individual narratives. You must also be a real team-player and confident networker able to build up a bank of ideas from talking to our many world class experts. Whether that is our R&D team looking at shrinking microprocessor technologies or our 5G experts thinking about network transformation.

You should not be constrained by the story-telling form. You may be producing an onstage presentation to 1,000 engineers, or a speech to an audience who only want to know what technology can do for them and not how it works. You may be working with one of our executives to write a monthly blog on industry trends or working with our creative team on a film script. We need someone who is as passionate about the future of technology as we are. Someone who enjoys an intellectual or philosophical discussion but who has narrative ability to sift the soil to find the gold and apply laser focus to get the job done on time, and at the highest quality. Arm is an architect of technologies and markets. We want an architect of our executive story.

What will I be accountable for?

• Shape the narrative of the C-suite and key business leaders
• Support and lead content/presentation creation for key Arm and industry conferences, bylined pieces
• Work with the content marketing, PR, creative, campaign and digital marketing teams to produce narratives that work on multiple story-telling levels and captivate our audiences
• Research audiences, event agenda, and topics; map the appropriate messages and Arm executive speakers to the opportunities; ensure end- to-end smooth delivery
• Develop powerful and visually-compelling C-suite keynote presentations, articles and other vehicles that tell our business story
• Debrief executive and business leads following each presentation to achieve continuous improvement.

About this role

If you are a technical lead with engineering expertise in CPU microarchitecture, performance-model development, performance analysis, or workload analysis, we would like to talk with you about joining Arm’s highly successful CPU performance architecture team based in Austin.  Our team plays a major role in crafting our next-generation Cortex-A class CPU designs and in enabling Arm partners to use our designs in world-class products. As a senior member of this expert team, you will own substantial and challenging performance projects

• Collaborate with other members of the design team - primarily in Austin - to help design our next-generation CPU microarchitecture
• Lend your expertise across all Performance sub-disciplines: microarchitecture and performance model development, microarchitectural performance analysis, RTL/performance-model correlation, workload analysis, and workload development
• Engage with key partners at an engineering level to understand their future performance requirements, performance sensitivities, and workload expectations
• Help develop the team and be a mentor to engineers
• Interact with customers and other third parties to successfully communicate complex technical ideas, and participate in internal and customer meetings

Arm is the industry's leading supplier of microprocessor technology, offering the widest range of microprocessor cores to address the performance, power and cost requirements for almost all application markets. Combining a vibrant ecosystem with more than 1,000 partners delivering silicon, development tools and software, and over 90 billion processors shipped, our technology is at the heart of a computing and connectivity revolution that is transforming the way people live and businesses operate.

In the role you are a part of the Austin-based CPU performance architecture team, which is part of Arm's worldwide CPU development group. This diverse engineering-centric team defines, designs, and validates Arm processor IP. Arm-based processors are the brains in billions of diverse electronic devices and we collaborate with the world's leading technology companies.

As an authority —think Senior/Staff/Principal type engineer-- on our team of about a dozen senior engineers, you tackle next-generation Arm Cortex-A class CPU microarchitecture design and performance analysis. You will be a part of a growing organization with a validated business model and a strong plan for continued future growth. Your team focuses on engineering using the latest tools and methodologies with an eye for innovation and creative problem solving.

Nike and sports technology brand Hyperice's new recovery boot and vest are each designed to squeeze, heat, and cool muscles.

Culture &Psychology, Ahead of Print. This study sought to understand the process of construction of the vocational identity of university students. Assuming cultural psychology as a theoretical reference, a qualitative methodology was adopted, with a narrative perspective. In-depth interviews were conducted with 20 participants, male and female engineering, and psychology students from two universities in […]

The post Narrative construction of vocational identity in university students: The role of influential experiences and significant others in the framework of cultural psychology was curated by information for practice.

Volume 34, Issue 5, September-October 2024, Page 348-365. Read the full article ›

The post Parenting Education for Women Experiencing Incarceration: Views of Prison Staff was curated by information for practice.

Volume 29, Issue 8, September 2024, Page 1047-1067. Read the full article ›

The post Military Widows’ Experiences of Social Isolation, Loneliness and Unmet Social Needs was curated by information for practice.

Abstract Objectives Higher education students experience elevated levels of suicidal ideation, but often face barriers in accessing support. The Mental Imagery for Suicidality in Students Trial (MISST; ISRCTN13621293; NCT05296538) tested the feasibility and acceptability of a six-session imagery-based approach called Broad-Minded Affective Coping (BMAC). This qualitative evaluation explored the experiences of MISST participants and staff. […]

The post A qualitative study exploring participants experiences of the Mental Imagery for Suicidality in Students Trial was curated by information for practice.

ABSTRACT Introduction Individuals with schizophrenia present anomalies in the extension and plasticity of the peripersonal space (PPS), the section of space surrounding the body, shaped through motor experiences. A weak multisensory integration in PPS would contribute to an impairment of self-embodiment processing, a core feature of the disorder linked to specific subjective experiences. In this […]

The post Peripersonal Space Plasticity in Relation to Psychopathology and Anomalous Subjective Experiences in Individuals With Early‐Onset and Adult‐Onset Schizophrenia was curated by information for practice.

To kick off NHPR's new reporting project By Degrees , we're unpacking the basics of how climate change is already affecting life in New Hampshire, and how the state is contributing to and responding to the problem. Rachel Cleetus is the policy director for the Union of Concerned Scientists' Climate and Energy Program, based in Massachusetts.

“Nobody really comes here,” the waiter at my hotel said. “People only stop when they’re driving through.” I heard that a lot during my recent three-night visit to Thunder Bay on the north shore of Lake Superior in Ontario, Canada.

One of the most common sayings in the English language is "the straw that broke the camel's back," signifying the gradual accumulation of heavy burden until finally, one additional blade of straw collapses the camel to his knees, no longer able to successfully bear the burden.

Fans from all over the world continue coming to Russia for the World Cup. In Moscow, football fans paralyzed many pedestrian streets having arranged mass festivities there. Most fans gathered on Nikolskaya Street, which is adjacent to Red Square. Crowds of football fans gathered on Nikolskaya Street to support their national teams. Russia is welcoming fans of all ages - one can see elderly people holding hands, young people partying and even young parents with children. Light garlands above the street created a very special atmosphere of a football carnival against the background of facades of historical buildings covered with flags of the countries participating in the championship.Representatives of Latin and South America predictably turned out to be most active football fans, for whom football is a religion. Peruvians and Mexicans attracted people's attention by performing  national dances and playing traditional musical instruments. Fans from Argentina gathered the largest number of fans around themselves as they were singing the national anthem in unison, infecting everyone around with football fever.The Moscow police were behaving in a very friendly way with foreign guests, but were firmly suppressing all attempts of the latter to drink alcoholic beverages in public places. Of course, unpleasant incidents are unavoidable, and foreign football fans already appear in crime reports. In St. Petersburg, a fan from Morocco was robbed after visiting the festival of FIFA fans on Konyushennaya Square. On the way back, the man found that he lost 2,500 euros and his iPhone 7. The loss was evaluated at about 200,000 rubles. The Moroccan fan could only speak Arabic, and it took police officers a lot of time to understand what he was trying to say.On June 11, a Chinese woman reported the loss of a designer backpack and an amount of money worth 3,000 dollars. The same day, an American man addressed the police saying that he was left without cash. A 25-year-old Egyptian reported the loss of his luggage. The young man could not overcome the language barrier and resorted to the help of his friend, who could speak English. It turned out that the men forgot about their bag with tickets inside as they were stunned with views of St. Petersburg. In Kaliningrad, Nigerian football fans asked local authorities permission to bring live chickens to the stadium. The authorities had to decline. For Nigerian fans, a chicken is their mascot that they bring to every venue.  They did not specify what they needed the chickens for, although it is generally believed that African football fans usually practice various magic rituals during football matches, and chickens are widely used in Africa for sacrifice. Nigeria will play against Croatia in Kaliningrad on June 16. World Cup 2018 scheduleJune 14thGroup A. Moscow, "Luzhniki". Russia - Saudi Arabia 18:00June 15thGroup A. Ekaterinburg. Egypt - Uruguay 15:00Group B. St. Petersburg. Morocco - Iran 18:00Group B. Sochi. Portugal - Spain 21:00June 16thGroup S. Kazan. France - Australia 13:00Group D. Moscow, "Spartacus." Argentina - Iceland 16:00Group S. Saransk. Peru - Denmark 19:00Group D. Kaliningrad. Croatia - Nigeria 22:00June 17Group E. Samara. Costa Rica - Serbia 15:00Group F. Moscow, "Luzhniki". Germany - Mexico 18:00Group E. Rostov-on-Don. Brazil - Switzerland 21:00June, 18thGroup F. Nizhny Novgorod. Sweden - South Korea 15:00Group G. Sochi. Belgium - Panama 18:00Group G. Volgograd. Tunisia - England 21:00June 19Group H. Saransk. Colombia - Japan 15:00Group H. Moscow, "Spartacus." Poland - Senegal 18:00Group A. St. Petersburg. Russia to Egypt 21:00June 20thGroup B. Moscow, "Luzhniki". Portugal - Morocco 15:00Group A. Rostov-on-Don. Uruguay - Saudi Arabia 18:00Group B. Kazan. Iran - Spain 21:0021st of JuneGroup S. Samara. Denmark-Australia 15:00Group C. Ekaterinburg. France - Peru 18:00Group D. Nizhny Novgorod. Argentina - Croatia 21:0022nd of JuneGroup E. St. Petersburg. Brazil - Costa Rica 15:00Group D. Volgograd. Nigeria - Iceland 18:00Group E. Kaliningrad. Switzerland - Serbia 21:00June 23Group G. Moscow, "Spartacus." Belgium - Tunisia 15:00Group F. Rostov-on-Don. South Korea - Mexico 18:00Group F. Sochi. Germany - Sweden 21:00June 24Group G. Nizhny Novgorod. England - Panama 15:00Group H. Ekaterinburg. Japan - Senegal 18:00Group H. Kazan. Poland - Colombia 21:00June 25thGroup A. Volgograd. Saudi Arabia - Egypt 17:00Group A. Samara. Uruguay - Russia 17:00Group B. Kaliningrad. Spain - Morocco 21:00Group B. Saransk. Iran - Portugal 21:00June 26thGroup C. Moscow, "Luzhniki". Denmark-France 17:00Group S. Sochi. Australia - Peru 17:00Group D. St. Petersburg. Nigeria - Argentina 21:00Group D. Rostov-on-Don. Iceland - Croatia 21:0027th of JuneGroup F. Kazan. South Korea - Germany 17:00Group F. Ekaterinburg. Mexico - Sweden 17:00Group E. Moscow, "Spartacus." Brazil - Serbia 21:00Group E. Nizhny Novgorod. Switzerland - Costa Rica 21:00June 28thGroup H. Volgograd. Japan - Poland 17:00Group H. Samara. Senegal - Colombia 17:00Group G. Kaliningrad. England - Belgium 21:00Group G. Saransk. Panama - Tunisia 21:00Playoff schedule30 June1/8 finals. Kazan. C1-D2 17:001/8 finals. Sochi. 1A - 2B 21:00July 11/8 finals. Moscow, the Luzhniki Stadium. B1 - A2 17:001/8 finals. Nizhny Novgorod. D1 - C2 21:002 July1/8 finals. Samara. E1 - F2 17:001/8 finals. Rostov-on-Don. G1 - H2 21:003 July1/8 finals. St. Petersburg. F1 - E2 17:001/8 finals. Moscow, "Spartacus." H1 - G2 21:006 July1/4 finals. Nizhny Novgorod. (A1-B2) - (C1-D2) 17:001/4 finals. Kazan. (E1 - F2) - (G1 - H2) 21:00July 7th1/4 finals. Samara. (F1 - E2) - (H1 - G2) 17:001/4 finals. Sochi. (B1-A2) - (D1-C2) 21:0010 July1/2 finals. St. Petersburg. 9pmJuly 11th1/2 finals. Moscow, the Luzhniki Stadium. 9pmthe 14 th of JulyMatch for third place. St. Petersburg. 5pmJuly 15The final. Moscow, Luzhniki 18:00

Astronomers at the University of Warsaw in Poland discovered a new Cepheid variable star. The newly discovered star, designated OGLE-GD-CEP-1884, has the longest pulsation period known for any variable of its type in the Milky Way Galaxy, an article published on the arXiv preprint server says. Cepheids are yellow giant and supergiant stars that change their brightness over time as a result of regular stellar pulsations. Given that their pulsation periods are closely related to their luminosity, astronomers use these stars to measure interstellar and intergalactic distances. Classic Cepheids, also known as Type I Cepheids, pulsate with highly regular periods ranging from a few days to months.

MandM, the online retailer specialising in discounted fashion, sports and outdoor brands, has launched the first of a series of live shopping events on Facebook and Instagram in collaboration with Sprii.

Linnworks, provider of inventory, order and warehouse management solutions for ecommerce retailers, has announced its new integration with Loop, a post-purchase platform designed to optimise returns, exchanges and reverse logistics.

Manhattan Associates Inc has announced that PacSun, the specialty retailer of emerging youth brands and trending fashion, has selected Manhattan Active Point of Sale to enhance its omnichannel sales strategy and deliver a seamless, unified customer shopping experience.

Checkout finance provider, Divido, has launched two new product capabilities ‘Divido Analytics’ and ‘Split Capability’, allowing merchants to have greater understanding and flexibility over their checkout finance experience.

The number of POS software installations at major retail and hospitality operators worldwide surpassed 9 million as of June 2023, according to a new study from strategic research and consulting firm RBR Data Services, a division of Datos Insights.

Manhattan Associates Inc. has announced significant enhancements to its Manhattan Active Point of Sale (POS) application designed to meet the dynamic needs of modern store associates.

By Jeremy Landau, freelance writer.

Retail's dynamic environment is seeing a real shift, driven by the integration of advanced software solutions. This goes beyond a mere technological upgrade – it's about completely transforming the customer experience.

By Ryan Edwards, freelance writer.

Omnichannel is one of the most effective retail strategies for engaging customers, driving sales, and building lasting relationships. A way to strengthen this game-changing approach is the revolutionary power of Artificial Intelligence (AI).

By Jack Pollard, freelance writer.

Retail is one of the most competitive landscapes out there today. Consumption is at an all-time high, but the cost of living crisis means that brands need to fight harder than ever to convince consumers that their products are what they need.

Security and Safety Things GmbH has entered into a partnership with the Johan Cruijff ArenA in Amsterdam to deploy its IoT platform for smart surveillance cameras to enhance overall fan experience, optimize ArenA operations and increase visitor security and privacy.

Before the start of the special military operation, US President Joe Biden received a document from US intelligence services about the fall of Ukraine, former Ukrainian Foreign Minister Dmytro Kuleba said in an interview with Channel 24. "He has a folder on his desk that clearly states that Ukraine will perish. That is, intelligence, the military, political analysts, the CIA — everyone was unanimous about it,” the former head of the Ukrainian Foreign Ministry said. Kuleba spoke about the document that he found during his visit to the United States shortly before the start of the ызуcial military operation. According to him, Biden himself and his administration were considering a possibility of creating a Ukrainian government in exile for that reason.

British Business-to-Business (B2B) companies take on average 32 days to collect, collate and enrich all the necessary data for a new product launch, significantly impacting UK productivity and go-to-market times, according to research conducted by Akeneo, the Product Experience (PX) Company and leading provider of Product Information Management (PIM) solutions.

Laboratory life: my work experience week at BGS  British Geological Survey

Electromagnetic geophysics in Japan: a conference experience  British Geological Survey

Following the work of Day & Hawthorne [Acta Cryst. (2022), A78, 212–233] and Day et al. [Acta Cryst. (2024), A80, 258–281], the program GraphT–T has been developed to embed graphical representations of observed and hypothetical chains of (SiO4)4− tetrahedra into 2D and 3D Euclidean space. During embedding, the distance between linked vertices (T–T distances) and the distance between unlinked vertices (T⋯T separations) in the resultant unit-distance graph are restrained to the average observed distance between linked Si tetrahedra (3.06±0.15 Å) and the minimum separation between unlinked vertices is restrained to be equal to or greater than the minimum distance between unlinked Si tetrahedra (3.713 Å) in silicate minerals. The notional interactions between vertices are described by a 3D spring-force algorithm in which the attractive forces between linked vertices behave according to Hooke's law and the repulsive forces between unlinked vertices behave according to Coulomb's law. Embedding parameters (i.e. spring coefficient, k, and Coulomb's constant, K) are iteratively refined during embedding to determine if it is possible to embed a given graph to produce a unit-distance graph with T–T distances and T⋯T separations that are compatible with the observed T–T distances and T⋯T separations in crystal structures. The resultant unit-distance graphs are denoted as compatible and may form crystal structures if and only if all distances between linked vertices (T–T distances) agree with the average observed distance between linked Si tetrahedra (3.06±0.15 Å) and the minimum separation between unlinked vertices is equal to or greater than the minimum distance between unlinked Si tetrahedra (3.713 Å) in silicate minerals. If the unit-distance graph does not satisfy these conditions, it is considered incompatible and the corresponding chain of tetrahedra is unlikely to form crystal structures. Using GraphT–T, Day et al. [Acta Cryst. (2024), A80, 258–281] have shown that several topological properties of chain graphs influence the flexibility (and rigidity) of the corresponding chains of Si tetrahedra and may explain why particular compatible chain arrangements (and the minerals in which they occur) are more common than others and/or why incompatible chain arrangements do not occur in crystals despite being topologically possible.

Preparation of biomacromolecules for structural biology studies is a complex and time-consuming process. The goal is to produce a highly concentrated, highly pure product that is often shipped to large facilities with tools to prepare the samples for crystallization trials or for measurements at synchrotrons and cryoEM centers. The aim of this article is to provide guidance and to discuss general considerations for shipping biomacromolecular samples. Details are also provided about shipping samples for specific experiment types, including solution- and cryogenic-based techniques. These guidelines are provided with the hope that the time and energy invested in sample preparation is not lost due to shipping logistics.

This article describes the diffraction pattern (2-periodic Fourier transform) from the vertices of a large patch of the recently discovered `Spectre' tiling – a strictly chiral aperiodic monotile. It was reported recently that the diffraction pattern of the related weakly chiral aperiodic `Hat' monotile was 2-periodic with chiral plane-group symmetry p6 [Kaplan et al. (2024). Acta Cryst. A80, 72–78]. The diffraction periodicity arises because the Hat tiling is a systematic aperiodic deletion of vertices from the 2-periodic hexagonal mta tiling. Despite the similarity of the Hat and Spectre tilings, the Spectre tiling is not aligned with a 2-periodic lattice, and its diffraction pattern is non-periodic with chiral point symmetry 6 about the origin.

In X-ray diffraction measurements, the angular resolution has a detection limit due to the receiving size of the detector. In many cases this detection limit is too large and must be breached to obtain the desired information. A novel method is proposed here by making the detector simultaneously measuring and moving. Using the deconvolution algorithm to remove the convolution effect, the pixel size limitation is finally broken. The algorithm used is not a common one, and suppresses signals at high frequencies, ensuring the reliability of the peak shape after restoration. The feasibility of this method is verified by successfully measuring the crystal truncation rod signal of SrTiO3 single crystal, and the resolution is nearly ten times higher than that of a single pixel. Moreover, this method greatly reduces the noise and improves the signal-to-noise ratio.

xrdPlanner is a software package designed to aid in the planning and preparation of powder X-ray diffraction and total scattering beam times at synchrotron facilities. Many modern beamlines provide a flexible experimental setup and may have several different detectors available. In combination with a range of available X-ray energies, it often makes it difficult for the user to explore the available parameter space relevant for a given experiment prior to the scheduled beam time. xrdPlanner was developed to provide a fast and straightforward tool that allows users to visualize the accessible part of reciprocal space of their experiment at a given combination of photon energy and detector geometry. To plan and communicate the necessary geometry not only saves time but also helps the beamline staff to prepare and accommodate for an experiment. The program is tailored toward powder X-ray diffraction and total scattering experiments but may also be useful for other experiments that rely on an area detector and for which detector placement and achievable momentum-transfer range are important experimental parameters.

The results of a study of the structural and reflective characteristics of short-period multilayer X-ray mirrors based on Mo/B4C at wavelengths 1.54 Å, 9.89 Å and 17.59 Å are presented. The period of the samples varied in the range 8–35 Å. The average widths of the interfaces were ∼3.5 and 2.2 Å at one and the other boundaries, with a tendency for weak growth with any decrease in the period. The interlayer roughness was ∼1 Å. The research results indicate promising prospects for the use of multilayer Mo/B4C mirrors for synchrotron applications.

This work presents a detailed analysis of the performance of X-ray magnetic circular dichroism photoemission electron microscopy (XMCD-PEEM) as a tool for vector reconstruction of magnetization. For this, 360° domain wall ring structures which form in a synthetic antiferromagnet are chosen as the model to conduct the quantitative analysis. An assessment is made of how the quality of the results is affected depending on the number of projections that are involved in the reconstruction process, as well as their angular distribution. For this a self-consistent error metric is developed which allows an estimation of the optimum azimuthal rotation angular range and number of projections. This work thus proposes XMCD-PEEM as a powerful tool for vector imaging of complex 3D magnetic structures.

Physical optics simulations for beamlines and experiments allow users to test experiment feasibility and optimize beamline settings ahead of beam time in order to optimize valuable beam time at synchrotron light sources like NSLS-II. Further, such simulations also help to develop and test experimental data processing methods and software in advance. The Synchrotron Radiation Workshop (SRW) software package supports such complex simulations. We demonstrate how recent developments in SRW significantly improve the efficiency of physical optics simulations, such as end-to-end simulations of time-dependent X-ray photon correlation spectroscopy experiments with partially coherent undulator radiation (UR). The molecular dynamics simulation code LAMMPS was chosen to model the sample: a solution of silica nanoparticles in water at room temperature. Real-space distributions of nanoparticles produced by LAMMPS were imported into SRW and used to simulate scattering patterns of partially coherent hard X-ray UR from such a sample at the detector. The partially coherent UR illuminating the sample can be represented by a set of orthogonal coherent modes obtained by simulation of emission and propagation of this radiation through the coherent hard X-ray (CHX) scattering beamline followed by a coherent-mode decomposition. GPU acceleration is added for several key functions of SRW used in propagation from sample to detector, further improving the speed of the calculations. The accuracy of this simulation is benchmarked by comparison with experimental data.

Synchrotron-radiation-based techniques are a powerful tool for the investigation of materials. In particular, the availability of highly brilliant sources has opened the possibility to develop techniques sensitive to dynamics at the atomic scale such as X-ray photon correlation spectroscopy (XPCS). XPCS is particularly relevant in the study of glasses, which have been often investigated at the macroscopic scale by, for example, differential scanning calorimetry. Here, we show how to adapt a Flash calorimeter to combine XPCS and calorimetric scans. This setup paves the way to novel experiments requiring dynamical and thermodynamic information, ranging from the study of the crystallization kinetics to the study of the glass transition in systems that can be vitrified thanks to the high cooling rates reachable with an ultrafast calorimeter.

With the development of synchrotron radiation sources and high-frame-rate detectors, the amount of experimental data collected at synchrotron radiation beamlines has increased exponentially. As a result, data processing for synchrotron radiation experiments has entered the era of big data. It is becoming increasingly important for beamlines to have the capability to process large-scale data in parallel to keep up with the rapid growth of data. Currently, there is no set of data processing solutions based on the big data technology framework for beamlines. Apache Hadoop is a widely used distributed system architecture for solving the problem of massive data storage and computation. This paper presents a set of distributed data processing schemes for beamlines with experimental data using Hadoop. The Hadoop Distributed File System is utilized as the distributed file storage system, and Hadoop YARN serves as the resource scheduler for the distributed computing cluster. A distributed data processing pipeline that can carry out massively parallel computation is designed and developed using Hadoop Spark. The entire data processing platform adopts a distributed microservice architecture, which makes the system easy to expand, reduces module coupling and improves reliability.

X-ray ptychography and ptychographic computed tomography have seen a rapid rise since the advent of fourth-generation synchrotrons with a high degree of coherent radiation. In addition to quantitative multiscale structural analysis, ptychography with spectral capabilities has been developed, allowing for spatial-localized multiscale structural and spectral information of samples. The SWING beamline of Synchrotron SOLEIL has recently developed a nanoprobe setup where the endstation's first spectral and resonant ptychographic measurements have been successfully conducted. A metallic nickel wire sample was measured using 2D spectral ptychography in XANES mode and resonant ptychographic tomography. From the 2D spectral ptychography measurements, the spectra of the components of the sample's complex-valued refractive index, δ and β, were extracted, integrated along the sample thickness. By performing resonance ptychographic tomography at two photon energies, 3D maps of the refractive index decrement, δ, were obtained at the Ni K-edge energy and another energy above the edge. These maps allowed the detection of impurities in the Ni wire. The significance of accounting for the atomic scattering factor is demonstrated in the calculation of electron density near a resonance through the use of the δ values. These results indicate that at the SWING beamline it is possible to conduct state-of-the-art spectral and resonant ptychography experiments using the nanoprobe setup.

Structural biology experiments benefit significantly from state-of-the-art synchrotron data collection. One can acquire macromolecular crystallography (MX) diffraction data on large-area photon-counting pixel-array detectors at framing rates exceeding 1000 frames per second, using 200 Gbps network connectivity, or higher when available. In extreme cases this represents a raw data throughput of about 25 GB s−1, which is nearly impossible to deliver at reasonable cost without compression. Our field has used lossless compression for decades to make such data collection manageable. Many MX beamlines are now fitted with DECTRIS Eiger detectors, all of which are delivered with optimized compression algorithms by default, and they perform well with current framing rates and typical diffraction data. However, better lossless compression algorithms have been developed and are now available to the research community. Here one of the latest and most promising lossless compression algorithms is investigated on a variety of diffraction data like those routinely acquired at state-of-the-art MX beamlines.

Signal-to-noise ratio and spatial resolution are quantitatively analysed in the context of in-line (propagation based) X-ray phase-contrast imaging. It is known that free-space propagation of a coherent X-ray beam from the imaged object to the detector plane, followed by phase retrieval in accordance with Paganin's method, can increase the signal-to-noise in the resultant images without deteriorating the spatial resolution. This results in violation of the noise-resolution uncertainty principle and demonstrates `unreasonable' effectiveness of the method. On the other hand, when the process of free-space propagation is performed in software, using the detected intensity distribution in the object plane, it cannot reproduce the same effectiveness, due to the amplification of photon shot noise. Here, it is shown that the performance of Paganin's method is determined by just two dimensionless parameters: the Fresnel number and the ratio of the real decrement to the imaginary part of the refractive index of the imaged object. The relevant theoretical analysis is performed first, followed by computer simulations and then by a brief test using experimental images collected at a synchrotron beamline. More extensive experimental tests will be presented in the second part of this paper.