Newsletters

Message from the Newsletter Editor

Kevin Ludwick, Newsletter Editor and Secretary/Treasurer

Kevin Ludwick

Greetings, FECS members! We are excited to present to you our newsletter for Spring 2019. We hope you find it informative and interesting. In these newsletters, in general, we aim to provide you with useful information about basic research in different fields of physics, information about our activities at conferences and elsewhere, opportunities to actively participate in FECS, and helpful guidelines toward furthering your career. This issue includes a survey of machine learning and its utility, a review of the FECS activities and sessions that happened during the APS March and April Meetings in 2019, a reproduction of a unit profile of FECS from APS News, job search advice from the DFD meeting, an interview with a successful South Asian physicist who travelled a difficult path and succeeded, and an introduction to the newly elected FECS executives. I offer my sincere gratitude to all the contributors for this issue of the FECS newsletter, who worked hard to provide useful and engaging content, and many thanks to all the FECS members for reading. Suggestions, comments about the newsletter, and article contributions are always very welcome, and you can reach me with these at kludwick@lagrange.edu or on our Facebook group (called “APS Forum for Early Career Scientists”). I hope to connect with you on our Facebook group and at upcoming APS meetings!


Sincerely,

Kevin Ludwick Signature

Kevin

Message from the Chair

Jason S. Gardner

Jason S. Gardner

Welcome to this first issue of the 2019 FECS newsletter. I am looking forward to a very proactive year on the forum business, especially in the international physics and young scientists front.

The APS staff from the president and CEO down recognise the importance of this critical group both for the good of global science and the vitality of the APS. Our membership represent the future leaders in science and are those who will have to live and work through some of the major changes that will happen over the next couple of decades. The APS has just released its Strategic Plan: 2019. As it clearly highlights, APS IS HERE FOR YOU. The APS deliberately sought out input from the FECS leadership for this document, recognising our importance. The CEO Kate Kirby, other members of the Board of Directors, senior members of the editorial staff and APS staff, and other unit leaders discussed the purpose and content of the Strategic Plan: 2019 before it was published. I recommend you read this short document.

A new slate of officers was installed in January, with the chair line moving one step forward. I welcome the new members of the Executive Committee: Ben Ueland (Chair-Elect), Ames Laboratory; Adam Iaizzi, National Taiwan University and Eric Sorte, Sandia National Laboratories (Members-at-Large). I thank Kevin Ludwick for stepping up and filling our Secretary/Treasurer position. As a team, the executive members hope to promote the issues of early career scientists, both in academia and industry, to the APS leadership and to assist the leadership in developing programs to retain members.

We are always looking for APS members to join our forum. In my year as chair, I am especially interested in finding more senior scientists in the world of industry and academia to join and help give back by advising and advocating for the younger scientist. Later in the summer we will be looking for candidates to run for up to 5 open positions on the executive. It is never too early to approach us, help at a meeting, and get your name out there. After all, those of us who live in America are already hearing of the big election in 2020.

As executives of our forum we continuously promote and defend the issues important to young scientists. This includes, but is not limited to, science in the international arena, open communication, safe and welcoming work environments, equal access to information and education, diversity, and gender equality. We are always open to suggestions for other areas of interest to members, topics to highlight at our annual meetings, and programs at the APS to support or start.

More About Jason S. Gardner

After obtaining his Ph.D. at Warwick University in the UK, Jason worked for several national laboratories in North America before moving to Sydney, Australia in 2013. From Sydney, he manages a group of five people performing neutron scattering at ANSTO, Australia, and around the world. He is currently a research Professor at Songshan Lake Material Laboratory, a new research laboratory in China. His scientific interests are primarily in frustrated magnets, but he’s also performed research in many areas of condensed matter over thirty years of research. He has published over 140 papers and 4 book chapters. He was made a fellow of the Institute of Physics (UK) in 2008 and the APS in 2019.

FECS Election Results Statement

Raju Prasad Ghirmire, Past Secretary/Treasurer

Raju Prasad Ghimire

The first general election for the Forum for Early Carrier Scientist (FECS) began on December 18, 2018 and closed on January 18, 2019 and the results are in: Benjamin Ueland of Iowa State University has been elected as chair elect (3-year term), and Eric Sorte of Sandia National lab and Adam Iaizzi of National Taiwan University became members-at-large (2-year term). All began their new terms at the beginning of 2019. The executive committee wishes to thank the elected candidates all who helped to make this election successful.




Ben Ueland (Chair-elect) is an experimental condensed-Ben Ueland
matter physicist specializing in neutron and x-ray scattering studies of magnetic correlated-electron materials. He earned a Ph.D. in Physics from the Pennsylvania State University in 2007 for his work examining cooperative magnetic-relaxation effects in geometrically-frustrated magnetic oxides using various very-low-temperature thermodynamic measurements. He joined the NIST Center for Neutron Research in 2007 as an NRC Postdoctoral Associate to learn neutron scattering techniques and became a G. T. Seaborg Institute Postdoctoral Associate at Los Alamos National Laboratory in 2010. In 2012, he joined the Correlations & Competition between the Lattice, Electrons, & Magnetism group at Ames Laboratory located at Iowa State University and is currently a staff scientist there. Some of his recent work includes identifying emergent itinerant ferromagnetism in hole-doped BaMn2As2, examining magnetostructural coupling and itinerant magnetic excitations in various 122 pnictide superconductors and related compounds, and characterizing fragile antiferromagnetism in the heavy-fermion YbBiPt.

Eric Sorte (Member-at-large) graduated from the University Eric Sorteof Utah with a B.S. in Finance in 2002. He spent 4 years working with various business consulting firms and investor groups in South America and the Eastern United States. After deciding to pursue science as a career, he attended Columbia University in New York City, pursuing a graduate degree in physics. He worked with the High Energy Cosmic Ray group developing software for the Telescope Array Project and received his Ph.D. in experimental condensed matter physics in 2011 studying manifestations of quantum chaos under the advisement of Dr. Brian Saam at the University of Utah. He then did postdocs at Washington University in St. Louis and Georgetown University before starting a job at Sandia National Lab where he is today. As a member of the Graduate School Advisory Committee (GSAC), Eric was instrumental in raising the levels of communication between graduate schools in the College of Science by spearheading interdepartmental activities. Eric has been very active in APS organizations, holding positions on the Executive Committees of the Forum on Graduate Student Affairs and of the Four Corners Section before becoming an APS Councilor. After leaving the Council. Eric worked with the Committee on Committees and more recently on the Committee on Informing the Public. As an active member of the APS, Eric has served on various panels both as panel member and host, including several APS webinars. He loves serving in the APS and looks forward to the next opportunity.

Adam Iaizzi (Member-at-large) is a postdoctoral research Adam Iaizziassociate at National Taiwan University. He received a B.S. in physics from Ithaca College (2011) and a Ph.D. in computational condensed matter physics from Boston University (2018). During graduate school, Adam was active in student leadership, serving as treasurer and later president of the university-wide Graduate Student Organization, where he successfully advocated for a paid parental leave policy for Ph.D. students and a 75% budget increase for the organization. He also organized events for the women in science group. Within the physics department, Adam helped organize a graduate student peer mentoring program. Off campus, Adam served as a science consultant to Massachusetts State Senator William Brownsberger, where he wrote a report summarizing the latest projections of sea level rise along the Massachusetts coast. Since moving to Taiwan, Adam has gotten involved in science outreach, speaking to junior high school classes about careers in science.

APS Membership Unit Profile: The Forum for Early Career Scientists

APS News January 2019 Issue

By Abigail Dove

The APS Forum for Early Career Scientists (FECS) provides support and mentorship to post-docs as they navigate through the early stages of their career, whether in academia or industry, in the US or abroad, or even a scientific field other than physics. This support spans from the professional—including networking opportunities with senior scientists in various physics careers, resources to help with successful grant writing, and funding for conference travel—to the practical—including support and advice around changes in geographical location, particularly for moving abroad.

Maria LongobardiEstablished in 2016, FECS is a relative newcomer to APS, but the forum’s fast-growing membership of nearly four thousand underscores the appetite for this kind of mentorship and support among early career scientists embarking on the next phase of their professional lives. Jason Gardner

FECS was founded by Maria Longobardi (who has served as chair since 2016) with thehelp of Jason Gardner (chair-elect whose term will begin in 2019). Longobardi and Gardner met while serving in the APS Forum for International Physics (FIP), and the idea for FECS was born from the perceived shortcomings Longobardi observed in the mentorship and support she and her colleagues received while navigating twists and turns in their career trajectories and locations as young scientists. Longobardi is a gravitational wave theorist turned condensed matter experimentalist, now working at the intersection of material science and microbiology, and Gardner is an instrumental scientist whose career has taken him from his native England to the US and now to Australia.

The Forum on Graduate Student Affairs (FGSA) has existed since 2001 to provide support for physics graduate students, and Longobardi and Gardner emphasize that a counterpart to meet the unique needs of post-docs and early career scientists was long overdue. “Postdocs have different needs than the graduate student community,” underscored Longobardi. Principally, many FECS members have families, which adds another dimension of complexity to the already challenging tasks of relocating and, if necessary, applying for visas. Added Gardner, many aspects of the professional landscape are unfamiliar to early-career scientists as they finish their postdoctoral fellowships. “Many early career scientists don't realize the different opportunities in front of them, what the competition in the job market looks like, what is involved in leaving the USA for work, or even what to ask when interviewing for a job,” he said.

Importantly, the forum’s support extends not only to early career scientists pursuing traditional paths in academia, but also the increasing number interested in joining industry and the private sector. This takes place in large part through events and receptions co-hosted with the Forum for Industrial & Applied Physics (FIAP) to promote dialogue and exchange between early career scientists and more senior members of industry. Beyond networking, this support also takes the form of actively educating early career scientists about the opportunities that exist beyond the sphere of academia, a domain that is likely quite unfamiliar, particularly for the majority of early career scientists whose mentors have been exclusively professors and academic researchers. For example, one of FECS’ most well-attended APS Meeting sessions to-date was a symposium on data science featuring panelists from academia as well as companies like Netflix and Uber to discuss various applications of data mining and work with large data sets.

In this way, FECS could play an important role in keeping industrial and applied physicists involved in the APS community. Citing a drop-off in APS membership among physicists who transition out of academia, Gardner noted that FECS aspires to be a kind of bridge between the worlds of academia and industry: “People in industry may not think that APS has anything to offer them, but that’s certainly not the case.”

Beyond the emphasis on career development and network building, FECS is sharply focused on helping members hone their science communication skills. “Science is for all, and we have to learn how to communicate to a broad audience,” noted Longobardi, herself a skilled science writer and a former editor at Nature, “I’m convinced this is one of the duties of a scientist.” Currently this spirit of science communication is most evident in the forum’s twice-yearly newsletter – a forum where, in Longobardi’s words, “people from gravitational physics can explain their research to condensed matter physicists” and vice versa. To make science communication more accessible for FECS members who may not yet feel confident contributing to the newsletter, the forum is also in the process of organizing workshops and webinars to help early career scientists develop and practice this crucial skill.

Although FECS is geared toward meeting the needs of early career scientists, activities aren’t restricted to this population. “We always get asked ‘Am I too old to join FECS?’” noted Gardner, “and we want elders in the community to join and help guide these busy young minds.” Longobardi echoed that her vision for the future of FECS involves a greater emphasis on guidance and mentorship from more senior scientists. As one example of how this intergenerational mentorship might come to fruition, FECS hopes to establish workshops at future APS meetings where early career scientists can get feedback on their CVs or resumes from experienced senior researchers and members of industry—especially those who have been involved in the hiring process.

Overall, FECS stands out as a forum with an incredibly bright future, and one that occupies an important niche for post-docs and early-career members in all their diversity. More information on this forum can be found on the FECS website.

The author is a freelance writer in Helsinki, Finland.

Forum For Early Career Scientists (FECS) Sessions at the APS March Meeting 2019

Jason S. Gardner, Chair

Jason S. Gardner

The Forum had several activities at both the March and April Meetings in 2019. These activities were organised to promote or encourage early career scientists to think outside the box and recognise the opportunities in front of them. Here I will highlight the March meeting events.

In March, we started off the week with the 2019 Energy Research Workshop, sponsored by GERA and FECS. This DOE supported meeting was held in Boston on Sunday, March 3, 2019. The workshop consisted of a series of talks by leading experts in the field, informal discussions during lunch and coffee breaks, and a panel discussion. Over 100 participants attended the daylong event, and every year we get great reviews.

On Wednesday the 6th at 8am, we co-sponsored a session entitled “Topology Matters: Structure-Property relationships on different length scales” with the Forum on International Physics (FIP). This session was in room 258A and our past-chair, to name one speaker, explained her work on STM and nanowires. This was an outstanding session highlighting a variety of science from around the world, with work at national laboratories and universities.

We also co-sponsored a session focused on industrial and applied research.
This Adam, Maria, and Bensession, entitled “Physicists of Evolving Careers Future” ends with the Distinguished Lectureship Award on the Applications of Physics given by Cynthia Keppel of the Thomas Jefferson National Accelerator Facility.

At the March Meeting the unit also co-hosted two receptions with our friends from FIP and FIAP. These were excellent opportunities for our members to interact with other members of the community, leaders in the field of physics, and perhaps future employers over light refreshments. On Tuesday evening, the FIP/FECS reception gave us an opportunity to acknowledge the distinguished student travel award winners.

As I mentioned before, the sessions we sponsor at the March and April meetings are put on to support the early career scientist community. We are always interested in hearing your ideas for sessions, whether it's a title or one or two key speakers. Please email the chair-elect with any suggestions you may have.

Overview of the APS April Meeting Sessions

Kevin Ludwick, Newsletter Editor and Secretary/Treasurer

The APS April Meeting in Denver, CO was an exciting meeting this year. The FECS sessions focused on science outreach to young people and publishing outside of academia.

Kevin Ludwick

FECS co-sponsored a session with the Forum on Physics and Society (FPS), chaired by myself. The session was entitled “Attracting Young People to Science and Science Policy”, and all the speakers were engaging and passionate about what they do. The talks were about educating others in an engaging way and getting them excited about science and its applications to public policy. Brian Jones (Colorado State University) spoke about he effectively communicates to the general public and to his university students the science and facts behind climate change. His Little Shop of Physics tours around doing great science outreach work. David Mauillo (Rutgers University) excitedly spoke about his outreach work that takes him across the country, and he emphasized the effective use of physics demonstrations to get people thinking about science and applications to science policy. He also involved the audience with some live demonstrations. His has many successful outlets for outreach, and his NYC theater presentation That Physics Show is performed around the world. The third speaker, Meredith Drosback, talked about the important work she does with SciLine as its associate director. SciLine is affiliated with AAAS, and its purpose is to match up the journalist who is tasked with covering a story that has connections to a specific science field with an expert in that field, even if the journalist’s deadline is only a few hours away. This effort to improve standards of science communication in journalism is important, and it has been fruitful. April Meeting Q&A at the Publishing Outside Academia Session

FECS also co-sponsored a session with the Forum on Graduate Student Affairs (FGSA) entitled “Publishing in Areas Outside of Peer Reviewed Journals”. The session was chaired by Tiffany Nichols from Harvard University. The talks highlighted various effective ways of communicating science outside of academic journals to diverse audiences. Brian G. Keating (USC San Diego) talked about his book Losing the Nobel Prize, which is a memoir about the cosmological probe BICEP’s cutting-edge observations of the polarization of the cosmic microwave background, its potential link to cosmic inflation, and its pursuit of the Nobel Prize. The second speaker, Nutsinee Kijbunchoo (Australian National University), spoke about her unique way of publishing science via comics, specifically on the work of the exquisitely precise gravitational interferometer LIGO. Afterward, Jermey N.A. Matthews (The MIT Press) gave a detailed overview of publishing books in the 21st century. He went through strategies for different routes of publishing, whether as a single author or as a part of a collaboration. He also talked about different facets of open access publishing versus for-purchase publishing.

The sessions were entertaining as well as informative and useful. I am looking forward to seeing what future sessions FECS will sponsor at the APS April Meeting. Suggestions for topics and speakers from FECS members are always welcome!

Stop Limiting Yourself

By Raju Prasad Ghimire

Radu Prasad GhimireStopping yourself from making achievements makes your life very uncomfortable and limited. Of course, every person can’t be a genius, but every person can contribute something. New challenges are opportunities for us. Exploring opportunities within difficulties is one of the things that everyone can do. The more we can test our limits and capabilities, the more we will learn about ourselves. Not only can you grasp an opportunity, but also you can create opportunities that other people can grasp.

Of course, challenges are everywhere. Taking on such challenges is an important part of growing and developing as a person. It is a great challenge to become a scientist from a South Asian country due to limited opportunity. However, despite the difficulties, scientists from South Asia contributed to STEM fields and made some major discoveries, including but not limited to the Raman effect (Sir Chandrasekhara Raman), the statistical method of handling bosons (Satyendra Bose), the structure and evolution of stars (Subramanyam Chandrasekhar), the calculation of the cross section for elastic electron-positron scattering (Homi Jehangir Bhabha), and the gauge field theory of electroweak interactions (Abdus Salam). Dr. Archana Sharma

Currently, Dr. Archana Sharma is one of the leading scientists from India, who has conceived and has been steering the GEM upgrade project over the last ten years at the CMS experiment as a principal scientist at CERN. She is also a role model inspiring young students in STEM fields and is paving the way by creating opportunities for others. Following a graduate degree in Nuclear Physics from BHU (Banaras Hindu University), Varanasi, India, Archana received her Ph.D. in particle physics from Delhi University in 1989 and the received her D.Sc. on instrumentation for high energy physics from the University of Geneva in 1996. Dr. Sharma also earned an executive MBA degree from the International University in Geneva in 2001. She is an internationally recognized expert for her experimental work on gaseous detectors for research in high energy physics.

Many scientists throughout the world want to be involved in a world-renowned, successful, and amazing project by any means, and experiments at CERN are flagship projects of the 21st century. Dr. Sharma made it to CERN from India, coming from a humble background, and is now at the pinnacle of her career within one of the largest scientific communities of high energy physicists. However, she started her journey through CERN as a summer intern. But the big question is what drove Dr. Sharma to get there, and the easy answer is her interest, passion, and hard work, and in our conversation, she explained in detail.

How was your family background and school life?
I was born in Jhansi (Uttar Pradesh, India), and both of my parents were teachers. I grew up like any other middle-class kid in India. I was always an average student during my school. But the support from my parents, close family, and teachers was enormous and enabled me to overcome any challenges, and my family was the backbone for all my success.

Why science (physics)? Why not another field?
Given encouragement all the time from mentors, I was always passionate to do something meaningful and impactful in life, and I thought physics could be the means, and it made me who I am today. I chose nuclear physics against electronics and solid-state physics at BHU simply due to the “outstanding” set of teachers at the physics department.

During school, what did you want to be in the future?
During school, I didn’t know what I wanted to do and never thought I would end up at the Mecca of particle physics. However, as I mentioned before, I was ambitious to contribute something to the society by following the footsteps of role models.

Did you really want to work at CERN?
Just like everyone else, I wanted to be a part of the world-renowned project or a similar place where I can use my ability and knowledge for fruitful outcomes. I found that CERN is one of those projects and I was passionate about it. It is not easy, but not impossible either.

Was it chance or passion?
Honestly, success by chance is very rare and of course, luck can be lured by hard work and grit of overcoming all challenges one faces.

When and how did you join CERN?
In 1987 I started to work at CERN as a summer intern for a few months and in that framework, I participated in an instrumentation school, where I received one of the awards, which was to spend a year at CERN. I worked on R&D for 12 subsequent years and then joined the CMS collaboration.

What were the difficulties?
I was still completing studies and working at CERN on detector development, and this was quite challenging, especially because I was in a foreign country with very few Indians. It was also daunting partly because of the complexity of instrumentation and the experiments. The day-to-day challenges of information management, laboratory schedules, learning, and progressing in a foreign land were massive. There was no scope of being employed as an Indian by CERN as it employs only member state nationals. But in certain exceptional cases this rule can be exempted, and in my case, the requirements of the job did not yield at that point of time an equivalently qualified member state national applicant.

How did you make it through other difficulties?
Self-commitment to deliver and family support are the keys. Besides that, I grew up in a society where education and emphasis on career was the only way to success, and that pushed me towards my achievement. As one example, when I was close to submitting my doctoral thesis at Geneva University, I was told about a new rule that I must complete certain courses in theoretical particle physics (in French) and that there would be an examination at the end. It was a great challenge since my master studies were already many years behind me, and I was fully immersed in the technology R&D. But working day and night, I managed it, eventually passing the exam with honors. With these small successes, I became confident that all challenges could be overcome if we believe we can do it. It is we who set the limits!

Are you the only one from South Asia who works as a principal scientist?
To my knowledge, I am the first permanent staff from South Asia, and I am privileged. Recently, more Indians are being employed since India has become an associate member. In addition, there are a number of institutions and physicists from South Asia collaborating with CERN projects.

What is your suggestion to the high school, undergraduate, & graduate student, and even the young scientist, for being successful in STEM?
Every person has a hidden Einstein inside with huge potential. Failures are stepping stones and obstacles are the first steps towards achievement. Youngsters should not give in to the allure of “fast job and big money”, a common trend. Please keep in mind that if anyone can do it, you can do it too. Of course, the first thing to examine is if you wish to follow the path of a scientist. If you wish to go for “fast job and big money”, it’s totally honorable since the choice is made by yourself. It’s your happiness eventually that counts!

Any other suggestions for success?
Start building your “career capital”, your experience in the field where you want to work. The path will open up automatically if you will not stop doing everything in your power towards achieving your goals. Make yearly goals, make daily goals, and review them every few months. Success cannot be far away!

Archana is the founder and leader of CMS GEM collaboration, which exploits one of the most sensitive detectors for trigger and tracking in the CMS experiment at LHC with very high discovery potential. The author and co-author of over 1000 publications, Ms. Sharma is invited regularly for talks in international conferences and public addresses in various science and technology events. Recently nominated as a Distinguished Lecturer at the US-based IEEE, she has collaborated at events at the ILO Geneva and World Communication Forum at Davos as spokesperson for diversity and excellence in scientific communication.

In summary, as Dr. Sharma thinks positively and keeps working with diligence in her field, she has been able to set an example for us to make a difference. If you're unsuccessful, you're not pushing your abilities, and if you're not pushing your abilities, you're not improving! Achievements come by accumulating daily tiny doses of failures and overcoming them.

How Can Machine Learning Help Your Research Forward?"

Wouter Deconinck, William & Mary

Wouter DeconinckThe excitement about machine learning, deep learning, and artificial intelligence is everywhere. What is behind these terms, and can you take advantage of their development to advance your career or research? Since we can only scratch the surface in this short and necessarily incomplete discussion, consider it a starting point for further exploration.

Let us start by defining artificial intelligence, the ultimate goal of developing systems that mimic “human intelligence,” i.e.,learning and problem solving. Formally, an artificially intelligent system independently takes actions based on measured inputs to maximize the probability to achieve its goals. To do so it relies on several subfields to derive meaning from inputs (computer vision, natural language processing) or to learn implicitly what to base decisions on (deep learning).

Machine learning is the subfield of artificial intelligence that uses statistical techniques to allow computer systems to progressively improve performance on specified tasks, i.e., learn, without explicitly programmed algorithms to perform those tasks. Perhaps the most common machine learning algorithm is the artificial neural network which forms the basis for the field of deep learning.

The “hello world” example of machine learning is handwritten digit recognition based on the standard MNIST data set. A traditional rules-based algorithm to classify the 28x28 pixel images into one of 10 digits would need to take into account whether the ‘7’ has a horizontal cross bar through the middle, and whether the ‘1’ is a simple vertical bar or has an ear and bottom serif. For every exception the algorithm becomes more involved. Machine learning takes a different approach and avoids the need to enumerate all possible cases.

We should not think of machine learning as a magic black box. It is a field founded on mathematical and statistical techniques that are familiar to many physicists (from linear tensor algebra and multidimensional calculus to Bayesian probability). It is not a universal solution to every problem, but it may help to automate certain classes of common problems in physics, leaving you with time to spend on problems not solved by artificial intelligence (yet).

Andrew Ng, a thought leader in the artificial intelligence community and the author of a popular online course on machine learning, summarized the set of problems where artificial intelligence can be useful as follows: If you can perform a mental task in less than a second, then an artificial intelligence algorithm can be used to automate the task now or in the near future. This turns out to be a useful test when assessing where you may be able to use machine learning algorithms. Start by focusing on the problems where you can quickly tell what the answer is but where it is hard to write down a traditional rules-based algorithm.

At the risk of oversimplifying, there are two broad classes of machine learning: supervised and unsupervised learning. In supervised learning, the data scientist has access to a representative training data set, perhaps painstakingly verified by hand. Using this training set of input values (features) and the corresponding output values (targets), the training process determines the parameters of the algorithm such that a loss function is minimized.

Two classes of problems lend themselves well to supervised machine learning. We discussed classification of handwritten digits, which is similar to the separation of signal from background based on detected signals in physics. In regression problems we wish to determine the relationship between input values and the expected mean of the output value, even when that output value is affected by measurement noise as is commonly the case in experimental physics.

The loss function to be optimized is often the sum of quadratic differences between predicted and actual targets, similar to a least squares method. For classification problems, where the algorithm determines probabilities for each possible class, we use loss functions based on log likelihood or information entropy.

The loss minimization during the training process often uses a variation of the gradient descent minimization algorithm, repeatedly applied on a subset of the potentially large training data set and with a specified learning rate. As with the fitting of a polynomial to a set of data points, overfitting can occur when the number of algorithm parameters is large, a common occurrence in large artificial neural networks. In order to minimize overfitting we set aside two parts of the training data set: for validation and for testing. After training an algorithm on the training data set, we assess the performance on the validation data set. When overtraining, the cost for the training set will continue to decrease but the cost for the validation set will start to rise indicating that we are now describing the training set at the cost of generality. After we determine the network parameters and learning rate through repeated training and validation cycles, we can assess the quality of the trained algorithm with one final evaluation of the as-of-yet-unseen test data set.

The strength of machine learning often derives from non-linear elements, for example, as activation function f in each of the nodes of a neural network that project their input x→ onto their output y = f(w→·x→ + b). Training determines the weights w→ and bias b for all network nodes. The S-shaped sigmoid curve ensures that the projection is continuous, differentiable, and bounded to the unit interval.

In unsupervised learning, we do not use a training data set. Clustering algorithms can find structure in high dimensional data sets based solely on the data set under study. Anomaly detection algorithms on measurement data may use autoencoder networks to reduce the data dimensionality, i.e., the network learns to ignore noise but recognizes when new data deviates regardless. This in turn can be exploited in generative adversarial networks to produce data sets that behave superficially as identical to an original data set, and this process is a fast and inexpensive way to produce additional simulated data.

If you are interested in exploring machine learning, you will find that nearly all common programming languages and physics analysis tools have support for some aspects of machine learning (including MatLab and Mathematica). Nevertheless, the most widely used and feature-rich tools (tensorflow and pytorch) have their best supported interfaces in Python. Interactive notebooks in Google’s Colaboratory platform are cloud-based and present several tutorials to get started. The interactivity and ease of visualization in these notebooks facilitates the frequent training/validation cycles in machine learning.

As with any new approach, starting with modest ambitions on a simplified model of your problem will help you develop an intuition for the effects of your choices of algorithm and parameters. You are entering an exciting world of applied mathematics and statistics!

Committee Member Biographies

Jason Gardner

Dr. Jason S Gardner, Chair
After obtaining his Ph.D. at Warwick University in the UK, Jason worked for several national laboratories in North America before moving to Sydney, Australia in 2013. From Sydney, he manages a group of five people performing neutron scattering at ANSTO, Australia, and around the world. He is currently a research Professor at Songshan Lake Material Laboratory, a new research laboratory in China. His scientific interests are primarily in frustrated magnets, but he’s also performed research in many areas of condensed matter over thirty years of research. He has published over 140 papers and 4 book chapters. He was made a fellow of the Institute of Physics (UK) in 2008 and the APS in 2019.

Benjamin Ueland

Benjamin Ueland, Chair Elect
Ben Ueland in an experimental condensed-matter physicist specializing in neutron and x-ray scattering studies of magnetic correlated-electron materials. He earned a Ph.D. in Physics from the Pennsylvania State University in 2007 for his work examining cooperative magnetic-relaxation effects in geometrically-frustrated magnetic oxides using various very-low-temperature thermodynamic measurements. He joined the NIST Center for Neutron Research in 2007 as an NRC Postdoctoral Associate to learn neutron scattering techniques and became a G. T. Seaborg Institute Postdoctoral Associate at Los Alamos National Laboratory in 2010. In 2012, he joined the Correlations & Competition between the Lattice, Electrons, & Magnetism group at Ames Laboratory located at Iowa State University and is currently a staff scientist there. Some of his recent work includes identifying emergent itinerant ferromagnetism in hole-doped BaMn2As2, examining magnetostructural coupling and itinerant magnetic excitations in various 122 pnictide superconductors and related compounds, and characterizing fragile antiferromagnetism in the heavy-fermion YbBiPt.

Maria Longobardi

Dr. Maria Longobardi, Past Chair
Maria Longobardi earned her Ph.D. in Physics from the University of Salerno, Italy in 2010 in experimental condensed matter physics. There she explored the local electronic and magnetic properties of superconductors, oxides and novel materials.

In 2011, she moved to the University of Geneva, Switzerland where her studies focused on the electronic properties of 1D systems at the atomic scale and on the atomics defects of 2D materials. She is currently at the Microbiology Department in Geneva performing interdisciplinary studies on novel hybrid biomaterials and bio-nanomaterials.

Maria is also a science communicator and freelance journalist. She has been active in the development of several international programs and outreach/educational activities.

During the past years, she served the APS as International Student Affair Officer and Newsletter Editor for the FGSA (2011-2015) and as Member at Large and Newsletter Editor for the FIP (2014-Current).

Kevin Ludwick

Kevin Ludwick, Secretary/Treasurer
After Kevin received his PhD from the University of North Carolina, he was a postdoctoral fellow at the University of Virginia for two years. He is now an assistant professor at LaGrange College in LaGrange, GA. He does research in theoretical cosmology, and his interests currently lie in dark matter and dark energy models. He serves as the Dual Degree Coordinator for LaGrange College students who go on to earn engineering degrees from partner institutions.



Eric Sorte, Member-at-Large Eric Sorte
Eric Sorte graduated from the University of Utah with a B.S. in Finance in 2002. He spent 4 years working with various business consulting firms and investor groups in South America and the Eastern United States. After deciding to pursue science as a career, he attended Columbia University in New York City, pursuing a graduate degree in physics. He worked with the High Energy Cosmic Ray group developing software for the Telescope Array Project and received his PhD in experimental condensed matter physics in 2011 studying manifestations of quantum chaos under the advisement of Dr. Brian Saam at the University of Utah. He then did postdocs at Washington University in St. Louis and Georgetown University before starting a job at Sandia National Lab where he is today. As a member of the Graduate School Advisory Committee (GSAC), Eric was instrumental in raising the levels of communication between graduate schools in the College of Science by spearheading interdepartmental activities. Eric has been very active in APS organizations, holding positions on the Executive Committees of the Forum on Graduate Student Affairs and of the Four Corners Section before becoming an APS Councilor. After leaving the Council Eric worked with the Committee on Committees and more recently on the Committee on Informing the Public. As an active member of the APS, Eric has served on various panels both as panel member and host, including several APS webinars. He loves serving in the APS and looks forward to the next opportunity.

Adam Iaizzi

Adam Iaizzi, Member-at-Large
Adam Iaizzi is a postdoctoral research associate at National Taiwan University. He received a B.S. in physics from Ithaca College (2011) and a PhD in computational condensed matter physics from Boston University (2018). During graduate school Adam was active in student leadership, serving as treasurer and later president of the university-wide Graduate Student Organization, where he successfully advocated for a paid parental leave policy for PhD students and a 75% budget increase for the organization. He also organized events for the women in science group. Within the physics department, Adam helped organize a graduate student peer mentoring program. Off campus, Adam served as a science consultant to Massachusetts State Senator William Brownsberger, where he wrote a report summarizing the latest projections of sea level rise along the Massachusetts coast. Since moving to Taiwan, Adam has gotten involved in science outreach, speaking to junior high school classes about careers in science.

Sara Clements

Sara Clements, Member-at-Large

A graduate of the University of Texas in Austin with a B.S. in Physics, Sara now lives in Brooklyn, NY working remotely as a Data Analyst at United Healthcare for a team based in LA. At UT she worked with a research group studying the technique of Raman spectroscopy. A longtime proponent of supporting women in STEM, she has volunteered as a mentor for grade school girls with an interest in science and mathematics. Since leaving school she has picked up skills in computer science and analysis and hopes to continue to pursue that further with an advanced degree in data science.

Dr. Mark Owkes

Dr. Mark Owkes, Member-at-Large
Mark is an assistant professor at Montana State University in the department of Mechanical and Industrial Engineering. His research interests include developing numerical methods to study gas-liquid multiphase flows such as the atomization of a liquid fuel.

More About Raju Prasad Ghirmire

Raju is a graduate student of Nanoscience and Microsystem Engineering at the University of New Mexico. He holds a master’s degree in data science and electrical engineering from South Dakota State University (08/2015-08/2018), USA and graduate degree in physics from Tribhuvan University (01/2008-01/2011), Nepal. His research interests include, but are not limited to, ultra-conductors, composites, energy storage, semiconductor application, and renewable energy.


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