Thank you, Brian, for that financial update. And I would like to thank and welcome participants on today's call. Today, we intend to review our progress during the first quarter of 2018, as well as share our insight into the future activities for 2018 and beyond. As you know, emissions controls is a massive, urgent and global need; and we believe ClearSign is uniquely positioned, thanks to our expanding portfolio of products to provide solutions, not only at a low cost but also with potential for attractive payback by improving efficiencies, reducing maintenance requirements and eliminating costly air population fines. Accordingly, we remain focused on three key initiatives to capitalize on our multi-billion dollar market opportunity for shareholders. The first is accelerating penetration into existing markets where we've already demonstrated best-in-class emissions controls performance with our patented and proven Duplex technology. The second is expanding into new international markets including most notably China, as well as Europe and the Middle East. And the third is faithfully investing in technology development to protect and enhance the Company's competitive advantage, as well as enable expansion into new markets. During the first quarter we continue to make progress on all three fronts which I would like to review at this time. We recently completed the final phase of $1.1 million flare projects. This project successfully retrofitted Duplex technology into enclosed ground flares for a major California oil producer and reduced emissions by 90% versus the existing controlled technology. Because of this significant improvements, we believe this multi-unit project created an entire new vertical for the industry which we believe ClearSign is ideally positioned to dominate overtime. Near-term, we anticipate our initial customer will have additional needs on a retrofit and a newbuild basis, thanks to the recent increases in production. At the same time, this customer also recently acquired significant assets in the enhanced oil recovery space in one of the most stringently regulated areas in the country. As a long time shareholder, you know, this market segment relies on Once Through Steam Generator or OTSGs to facilitate production. And the Duplex technology has a long-standing track record of delivering best-in-class NOx emissions reductions in OTSGs. As such, we are excited about the opportunities to help this customer with their emissions control needs, both for flares and OTSGs. We look forward to providing updates on both fronts in the coming months. Speaking of OTSG vertical, I'm happy to report that during the quarter we successfully completed a follow-on project for an OTSG system in a complex waste gas application. This retrofit unit achieved initial field testing results with an average NOx emission of 2.2 parts per million, significantly below the current regulatory standard of 5 parts per million. We believe this is another industry first, and therefore is a breakthrough that should not go unnoticed by potential customers and shareholders alike. I would remind everyone that the cost of deploying our Duplex technology to achieve these emissions levels is a fraction of the cost related to alternatives such as selective catalytic reduction. As previously disclosed, ClearSign negotiated a multi-year multi-unit contract with this customer for Duplex technology in OTSGs. While a specific commercial terms of this agreement have not been made public. We can share that we remain in active discussions with this customer to support their future requirements. Moving on to our refinery vertical; we are actively working with Delek Refinery in Tyler, Texas to schedule the installation of the remaining Duplex plug and play burners into their FCC heater. During our last call, we provided an update that we finalized the initial burner installation and based on the performance, the customer requested several modifications to determine if it was possible to increase each burners firing rate while maintaining the same footprint and NOx emissions profile. It's important for investors to understand that this is not possible with existing low NOx and ultra-low NOx burners on the market. However, our technical team has determined it is possible with Duplex technology. Accordingly, we made the necessary adjustments and are now awaiting the customers go ahead to finalize the installation. As is customary in all our verticals, variability unrelated to our technology can impact the timing of our installations. We continue to provide relevant updates as they become available. We're also working with Delek on opportunities to install our technology in their various delayed coker units where we believe the inherent advantages of Duplex technology will help debottleneck these assets and reduce flame impingement resulting in significant cost safety and emissions improvements. Also in our refinery segment, we continue to work closely with ExxonMobil in the development and deployment of our Duplex technology. As for the previously announced success of the joint testing at ClearSign's headquarter in Seattle, we have moved to regular ongoing technical meetings to discuss further deployment of our technology at one location within ExxonMobil's U.S. refinery and petrochemical operations. Once this location has been selected and an installation scheduled, determined, we will be able to notify shareholders as to our progress. In addition, and separate from the previously announced project with ExxonMobil, ExxonMobil has also asked us to evaluate the potential for applying our Duplex technology to heater treaters. For those unaware, this piece of equipment are found on almost every oil and gas pad site, they use to further separate oil, gas and water and they often required costly and ongoing maintenance to repair fire tubes due to flame impingement. Thanks to Duplex's design which inherently eliminates flame impingement, we believe heater treaters could represent a new significant end market for our technology, although preliminarily we look forward to providing more clarity on this potential opportunity in the future as pursue it with ExxonMobil, as well as other refiners. In summary, we are encouraged by the continued cooperation and high probability of follow-on orders in our existing markets. At the same time, we can also report that we are expecting a meaningful uptick in new business opportunities in our established verticals. We are in various stages of commercial discussions with over a dozen potential new customers including multiple super majors. While the recent rise in oil prices is obviously a factor, the need for clean air and in turn, affordable NOx emissions control offered by Duplex is ever presence. Accordingly, we believe the increase in pipeline activity is more directly related to our ability to productize our technology and our commitment to continue to expand our base of field installations within our core markets. Including in the first quarter, we look forward to announcing new orders in the coming months. Moving outside the existing markets, our second key factor area of focus is expanding internationally. We have prioritized our opportunities based on regions with clear needs for emissions reductions, a clear regulatory mandate, and most importantly, a budget for making improvements. In other words, we are focusing on international opportunities that represent the fastest path to revenue for the company. The most notable of such opportunities remains China. You will recall, ClearSign is currently working with a large state-owned enterprise on a large retrofit project for Chinese District Heating group which alone if successful could represent hundreds of retrofit burner opportunities and virtually thousands of retrofit opportunities throughout the balance of China's District Heating market. During the initial phase of this project, the Company expects experts determine substantial burner modifications where necessary to simplify the delivery of gas and air to provide an ideal operating environment for our Duplex to achieve ultralow NOx emissions. The level of modifications is consistent with previous initiatives and installations from customers in other verticals. It is important to note that we choose to retrofit the customer's burner because that is what the customer asked us to do. Since this client has literally hundreds of this type of European burner, the client believes ClearSign's ability to retrofit their existing burners and upgrade them to Duplex would result in a significant cost savings, as well as allow them to use existing components like burner management systems, fuel trains, etcetera. When marketing a new technology to a new customer with a huge potential sales in China, it is important to try very hard to accommodate the customer's wishes and this is exactly what we did here. While we were unable to complete the work during the heating season, this is not the result of any failure of the Duplex technology, rather it was the result of having to characterize multiple operating details of an existing burner in the field because the manufacturer would not give us the design details. If they did, it would have simplified and significantly accelerated this retrofit process. Their reluctance is understandable in a competitive market since this burner manufacturer would lose it's largest single customer when Duplex is installed successfully. Nevertheless, we are encouraged by the project progress we are making during the heating season. Our customer has been very supportive and we continue to work towards the solution before the beginning of next heating season to demonstrate the Duplex technology and satisfy the testing requirement as soon as practical. It is important to note that the Heating District project represents just one of the opportunities we are currently pursuing in China. The Company is in advanced discussions with additional customers in the refinery and petrochemical industry including customers like Sinopec and BASF. What's more, as announced previously, strategic investment from potential partners like CITIC and others will accelerate our efforts as our commercial success evolves in China. Beyond China, we have interests in other parts of Asia including South Korea and Japan, and continued interest in our technology throughout Europe and the Middle East. We remain optimistic about the long-term market opportunity and demand for our technology globally, and we expect to be able to provide key updates in this regard shortly. Moving on to our final focus area, technical development. We made encouraging progress during the quarter developing a pre-engineered fire tube boiler burner. As a reminder, this represents a $1 billion additional market opportunity for the Company based on an independent third-party market analysis done by Frost & Sullivan. This product is currently in laboratory development stage and previously shows promising performance compared to the best products that are currently available in the market to-date, more specifically, we reported NOx emissions of 10 ppm at 5% oxygen concentration without the use of expensive Flue Gas Recirculation. During the first quarter we were able to achieve NOx emissions of less than 8 ppm at 3% oxygen concentration at these levels and after successful scale up and expansion of our operating envelope including increased turn down. We could bring to market a product that delivers NOx emissions roughly 50% below the existing emissions requirement depending on the industry and the region. In other words, we would be a compelling offering that we're confident could sell-through into key markets including China. That said, the latest results and progress also give us more confidence than ever that we will be able to achieve our stretch goal of 5 ppm NOx at 3% oxygen which would represent a truly breakthrough emissions product for the industry. Based on the recent progress, we believe the next step required is for us to demonstrate and scale our work in the field. To that end we are actively evaluating installation sites with potential customers, concurrently exploring multiple commercial avenues including our original plan for this vertical to license the technology to major global boiler manufacturers. I'm happy to report that earlier this week we were awarded a Department of Energy grant to the small business innovative research and small business technology transfer program offices. Phase 1 of this grant provides a $150,000 in funds over the next 9 month period starting in July. The funds will be used to extend Duplex's already impressive performance and potentially act as a technical enabler for product implementation and execution into other vertical markets. If Phase 1 is successful, the Company will be eligible to potential receive upto $1.5 million in initial funds as part of the Phase 2 of this grant. This is a significant achievement for two reasons; first, it represents testing derivative of our original ECC technology that if successful, could enhance the already state-of-the-art performance characteristics and controls offered by Duplex. Second, it represents a non-dilutive means to supplement our R&D efforts which is an ongoing avenue being pursued by the Company. In fact, we were recently selected to advance to the next stage of consideration for two additional government grants worth a total of $600,000. We're in the process of submitting a final proposal and expect a final decision to be made on both by the end of the third quarter. Regardless if the grants are awarded, we remain committed to advancing our technology through regular research and development spending. As discussed on the last call, we recently made several technical advancements which should enable us to expand into new significant end markets including aerospace, gas turbines and marine. We look forward to providing more clarity on these potential opportunities in the future as development warrants. Our ongoing commitment to research and development has also led to three additional patents granted in the first quarter bringing our total patent portfolio to 45 grants and 81 applications as of March 30, 2018. Before closing, I want to provide an update on the regulatory front. ClearSign continues to enjoy a very symbiotic [ph] relationship with regulators whose interest lie in driving down emissions combined with the industry's interest in having cost effective solutions. More and more regulators are recognizing ClearSign's patented and disruptive technology creates the paradigm shift that clean air can be achieved at lower costs. This already resulted in the award from the South Coast data quality management district for demonstration site in Southern California. We continue to work hand-in-hand with regulators defined a suitable refinery partner and do not believe we're going to have a problem there. Moreover, as emission rules are being revisited in multiple jurisdictions in our core markets, we expect our ability to deliver NOx emissions consistent with -- and in many cases, superior to existing best available control technologies will lead to a BACT designation for our technology. While this is not a requirement for commercialization, any such regulatory designation promises to accelerate market adoption of our Duplex. In closing, I'd like to reiterate that ClearSign has demonstrated the ability for Duplex to deliver solutions that can provide clean air at low cost with an attractive payback. While the timing of follow-on orders and revenue grant is difficult to determine, we continue to demonstrate efficacy with our existing base of deployments and we are making significant progress towards broad-based commercialization. In addition, our pipeline of opportunities continues to expand with new and existing customers, as well as in new end markets. I remain very excited about the Company's potential, our technology and the prospects of converting our current pipeline into meaningful revenues. At this time, I'd like to turn the call over to the operator for questions.