Algonquin College

Ottawa, Canada

Algonquin College

Ottawa, Canada

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We demonstrate a novel method to measure circular birefringence (CB) and linear birefringence (LB) present simultaneously in the device under study. By using a π-shifted Sagnac interferometer, the scheme eliminates the dependence on incoming polarization and on the orientation angle of the linear birefringence. Moreover, due to different handedness symmetry/response of CB and LB to counter-propagating waves, the technique allows us to control the relative influence of the two birefringences leading to a requirement of only two measurements to determine both of them. Thus, comparing to Stokes polarimeters and other methods, our scheme has advantages when characterizing media containing both birefringences. Our findings are experimentally confirmed. © 2017 Optical Society of America.


News Article | May 15, 2017
Site: www.marketwired.com

TORONTO, ON--(Marketwired - May 15, 2017) - A select group of Ottawa area high school students are getting an exclusive look into the many opportunities available in the world of business at the No Limits Ottawa Conference being hosted by the Chartered Professional Accountants of Ontario on Wednesday, May 17. Almost 100 students, nominated by their teachers for their leadership skills and interest in university business programs, will be attending the conference. The No Limits Ottawa Conference brings CPAs from Ottawa's top businesses together with students most likely to be tomorrow's successful business professionals. During No Limits, students will get the chance to meet CPAs and discuss the many opportunities that open up for people who achieve the prestigious CPA designation. Participating organizations include several prominent Ottawa-area organizations such as the Canada Revenue Agency, Rogers, the Ottawa Senators and accounting firms. Among the day's highlights will be a presentation by Sarwar Qureshi, CPA, CA, principal at Paterson & Company. Sarwar helps incorporated professionals and owner-managed businesses succeed. He is also a popular accounting professor at Algonquin College and has delivered tax seminars with Invest Ottawa. Media are invited to attend all or part of the No Limits Conference and interviews can be arranged with organizers and participants. About the Chartered Professional Accountants of Ontario CPA Ontario protects the public interest by ensuring its members meet the highest standards of integrity and expertise. CPA Ontario serves and supports its more than 87,000 members and 19,000 students in their qualification and professional development in a wide range of senior positions in public accounting, business, finance, government, not-for-profits and academe. Chartered Professional Accountants are valued by organizations of all types and sizes for their financial expertise, strategic thinking, business insight, management skills and leadership. For information on the profession, visit cpaontario.ca.


News Article | May 22, 2017
Site: cleantechnica.com

Today’s grid is becoming more digitized with information technology, helping to make the transition to renewable energy a relatively smooth process. Despite this, significant challenges — including blackouts, natural disasters, and cyber attacks — doe pose high risks to the grid. Microgrids can play a role in limiting these problems. According to a report from Renewable & Sustainable Energy Reviews by a team of Michigan Tech University energy policy analysts and engineers, the US military would need to put down 17 gigawatts (GW) worth of solar photovoltaic (PV) to shore up their domestic bases. The analysis also suggests that, economically, it’s good to do this. Emily Prehoda, a Michigan Technical University student who is finishing her Ph.D. in energy policy, stressed the importance of how the military links policies and technical accommodations, watching it flow down to other vital services and infrastructure projects. “This is such a huge issue, not only for the military but for other organizations, and it hits from all different sides, from the technical, economic and social—and it leads back to the idea of security,” said Prehoda to Michigan Tech News. Co-author Joshua Pearce said despite progress made by the US military on renewable energy (targeting 25% of its energy production within 8 years as the Army ramps up its solar goals), more work is required on military power systems that are using generators, which are at a higher risk of cutoff. Currently, 27 of the more than 400 domestic military bases have plans in motion for PV microgrids or now have them. Microgrids are becoming a strong focus point to mitigate energy risks from various sources, including natural disasters — a headache for electricity planners, with an average cost from $18 to $33 billion a year (just in terms of power outages and infrastructure damages). As the climate warms, expect further costs to rise, and further stress on the electricity system. Cyber security risks have also become a bigger threat to the grid. In 2013, the “Dragonfly incident” showed how vulnerable our networks could be in the digital age. Hackers infected a website from a French cleantech company, which affected consumers while cracking into industrial systems. Solar microgrids give a tremendous opportunity to limit the concerns of cyber security problems, blackouts, and extreme weather events. Researchers analyzed domestic military bases across current electrical loads. Afterward, the team looked at current and projected PV-powered microgrids with earlier grid deficiencies, plus probable solar energy in every state. A total of 2,140 GW would be required to fulfill critical infrastructure, with 100% solar energy mixed into a microgrid system with storage tied in. US military systems alone would need 17 GW of solar. The report then reviewed the economics & technical aspects of hiring “top 20 contractors” who work with the US Department of Defense. A case study within the report investigated three businesses (Bechtel, General-Electric, & Lockheed Martin) with regards to potential resources and technical skills. What they found was that it’s possible to meet grid flexibility and deploy microgrids. Ph.D. advisor Chelsea Schelly suggests it’s good for the military to support microgrid deployment as a national security policy. “If we recognize that this capacity already exists, then we can start thinking about PV as a security measure by integrating microgrids — and then creating local resilience based on military technologies,” said Schelly to Michigan Tech News. The paper also looked at how supporting military microgrids could seep down into other points of infrastructure. Military-based microgrid technology could help ramp microgrids at other governmental departments, organizations, hospitals, businesses, and homes, according to the report. You can expect microgrids to flourish in the future. By 2022, the global microgrid market will reach nearly $39 billion, according to Markets & Markets. In 2016, US solar installations were 14.76 GW, almost doubling (a 97% increase over) 2015 installations. Given all the challenges of meeting higher demands from increased use of electronic devices while mitigating blackout, climate change, and cyber security concerns, the US military has a tremendous opportunity to lead the deployment in solar microgrid development at home for exactly those benefits. Check out our new 93-page EV report. Join us for an upcoming Cleantech Revolution Tour conference! Keep up to date with all the hottest cleantech news by subscribing to our (free) cleantech daily newsletter or weekly newsletter, or keep an eye on sector-specific news by getting our (also free) solar energy newsletter, electric vehicle newsletter, or wind energy newsletter. Adam Johnston Is expected to be completed the Professional Development Certificate in Renewable Energy from the University of Toronto by December 2017. Adam recently completed his Social Media Certificate from Algonquin College Continuing & Online Learning. Adam also graduated from the University of Winnipeg with a three-year B.A. combined major in Economics and Rhetoric, Writing & Communications in 2011. Adam also owns a part time tax preparation business. He also started up recently Salay Consulting and Social Media services, a part time business which provides cleantech writing, analysis, and social media services. His eventual goal is to be a cleantech policy analyst. You can follow him on Twitter @adamjohnstonwpg or his business www.salayconsultiing.com.


Daria Olah, REALTOR®, Oak Realty Ltd., has joined The Expert Network©, an invitation-only service for distinguished professionals. Ms. Olah has been chosen as a Distinguished Real Estate Professional™ based on peer reviews and ratings, dozens of recognitions, and accomplishments achieved throughout her career. Ms. Olah outshines others in her field due to her numerous awards and recognitions, and outstanding customer service. She attended Nipissing University in Ontario and graduated with a bachelor’s degree in Criminal Justice. She went on to receive a Veterinarian Certificate from Algonquin College as well as a Counseling Certificate. Ms. Olah also holds a Teaching Certificate from York University and previously taught elementary school children where she was tasked with listening to and understanding student needs to help them grow and achieve their goals. Ms. Olah brings a wealth of knowledge to her industry, and, in particular, to her area of expertise, the real estate market of Ontario's Elliot Lake. When asked why she decided to pursue a career in real estate, Ms. Olah said: "I love to stay busy. Because of my strong work ethic, I was essentially looking at the careers where the harder I'd work, the more success I would have. Real estate provided me with this opportunity." After spending ten years exploring different career paths outside of the real estate industry, Ms. Olah ultimately returned to her original passion and hasn’t looked back since. Her understanding of the Algoma District and its surrounding communities have fueled her work as a REALTOR®, allowing her to find quick success on her professional path while continuing her lifelong goal of helping people. As a thought-leader in her field, Ms. Olah keeps an eye on industry trends and developments in the local Ontario market. In particular, she has been paying close attention to the recent influx of buyers coming from the Toronto area. She noted: "We have noticed a large increase of buyers from down South. Elliot Lake is known to many as a retirement community and it is easier to find affordable houses here as opposed to most other towns/cities. I find that having a good grasp of the area is very important, especially with those buyers who don't know Elliot Lake and what it has to offer. With a population of only about 11,500, Elliot Lake has a lot to offer. For example, we offer an 18 hole championship golf course, municipal pool, ski hill, many lakes for fishing, and beautiful trails for hiking." After only Residing in Elliot Lake since 2013, Ms. Olah has worked extremely hard to establish herself in the community, offering outstanding customer service and superior marketing. Ms. Olah's core values include trustworthiness, hard work and diligence. Her positive attitude coupled with her genuine care for clients and strong willingness to go that extra mile has accelerated into profound success within only a short period of time. Ms. Olah also exercises a desire to give back to the community and donates to the local animal shelter (Society for Animals in Distress) from every sale she makes. Moving forward, Ms. Olah plans to build upon her reputation as one of the top selling agents in the region with an eye toward increasing her sales numbers each year and solidifying her presence in Elliot Lake’s real estate market. Ms. Olah enjoys spending time with family and friends, being active and being involved with continued success in the real estate industry. The Expert Network© has written this news release with approval and/or contributions from Daria Olah. The Expert Network© is an invitation-only reputation management service that is dedicated to helping professionals stand out, network, and gain a competitive edge. The Expert Network selects a limited number of professionals based on their individual recognitions and history of personal excellence.


The International Nurses Association is pleased to welcome M. Anne Slater, RN, to their prestigious organization with her upcoming publication in the Worldwide Leaders in Healthcare. M. Anne Slater is a Registered Nurse with more than 34 years of experience in her field and an extensive expertise in all facets of nursing, especially gastrointestinal and camp nursing. She is currently serving patients in Ontario, Canada. M. Anne Slater gained her Nursing Degree in 1982 from Algonquin College in Ottawa, Ontario, becoming a Registered Nurse. Since graduating, she has completed a number of advanced training courses while practicing as a nurse. To keep up to date with the latest advances in nursing, M. Anne Slater maintains a professional membership with the College of Nurses of Ontario and the Registered Nurses Association of Ontario. She says that her success is thanks to being a team player and problem solver, and she loves managing, mentoring and training new staff and nurses. When she is not working, M. Anne Slater enjoys reading, knitting, skiing and biking. Learn more about M. Anne Slater here: http://inanurse.org/network/index.php?do=/4136144/info/ and be sure to read her upcoming publication in Worldwide Leaders in Healthcare.


Khonina S.N.,Russian Academy of Sciences | Golub I.,Algonquin College
Optics Letters | Year: 2011

We show that, by adding a π-phase shift to one-half of a linearly polarized beam, the roles of the transversal and longitudinal field components of the focused beam are interchanged, resulting in better focusing of the longitudinal component in the direction perpendicular to the phase jump line. For this component the scheme produces a spot with FWHM > 15% smaller than a spot generated with either linearly or radially polarized light for any NA. The scheme has a similar advantage when applied to circularly polarized light, and it holds for both a plane wave and a realistic case of a Gaussian incident beam. This technique may find applications when using recording media responsive to the longitudinal field only, particularly in read/write for optical storage where the resolution in one transverse dimension is most important. © 2011 Optical Society of America.


Khonina S.N.,Russian Academy of Sciences | Golub I.,Algonquin College
Journal of the Optical Society of America A: Optics and Image Science, and Vision | Year: 2012

We compare different beam combinations for stimulated emission depletion microscopy. The four considered copolarized, mutually symmetric, but complementary write + erase beam combinations are circularly polarized beam + circularly polarized vortex with charge +1 or -1, azimuthally polarized with a vortex + azimuthally polarized, and radially polarized beam + radially polarized with a vortex. The resulting fluorescent spot was calculated for plane incident pump and erase beams, for plane waves with added high NA annular ring apertures, and when both incident beams were optimized with amplitude-phase masks. For all three incident wave cases, the azimuthal polarization combination consistently produces spots 15%-C30% smaller than the commonly used, circularly polarized light combination (the first from above). The two other polarization combinations produce even smaller, of the order of nanometers /0.003λ, fluorescent spots with a caveat of having nonzero erase beam intensity in the center. Nevertheless, these combinations can be advantageous when exploiting PF, i.e., using molecules that respond solely to the longitudinal (or only to transversal) component of the illuminating field. © 2012 Optical Society of America.


Khonina S.N.,Russian Academy of Sciences | Golub I.,Algonquin College
Journal of the Optical Society of America A: Optics and Image Science, and Vision | Year: 2012

We compare generation of a dark spot using focusing of beams with azimuthal polarizion, radial polarization with a vortex, and a circular polarization with either a first or second order vortex. By optimization of the amplitudephase pupil, it is ascertained that azimuthal polarization is the most suitable one to obtain the diffraction bounded dark spot per se whose scalar approximation limit has FWHM = 0.29λ. Consequently, for dark spot generation, this polarization plays the role of the radial polarization in creation of the diffraction-limited bright spot. Using azimuthal polarization, it is shown that an amplitude-phase filter allows generation of a subdiffractive dark spot in a prescribed finite area. © 2012 Optical Society of America.


Golub I.,Algonquin College | Exir H.,Algonquin College
Optics Letters | Year: 2013

We present a left-right symmetry restoring method, which removes the detrimental birefringence in the singlemode fiber Sagnac interferometer, achieved with the aid of a half waveplate oriented at a specific angle. We show theoretically and demonstrate experimentally that adding a π-shift between clockwise and counterclockwise propagating, horizontally (in fiber loop plane) polarized field components, the Sagnac loop mirror's reflection becomes independent on birefringence of an element placed in the loop. © 2013 Optical Society of America.


News Article | April 17, 2016
Site: www.topix.com

Algonquin College mechanical engineering student Joseph Dupuis - whose off-the-grid cabin went viral last spring - displays an early prototype of his solar tracking device in September 2015. A local entrepreneur who made global headlines for his off-the-grid home last year is getting ready to unveil his latest unconventional solution in sustainable energy.

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