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Prof. Lal Tennekoon: An illustrious but utterly unpretentious and much -loved academic

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Prof. Lal Tennekoon

Professor Basil Laliputhra Tennekoon, Emeritus Professor of Civil Engineering at the University of Moratuwa, was called to rest on 30 March 2025 at the age of 82. He was educated at S. Thomas’ College, Mt. Lavinia, where he won the Miller Mathematics Prize in 1960, an achievement that gets one’s name on a board in the college hall. The prize is named after Rev. Edward Miller, the fifth warden of the school, who had read mathematics at Cambridge. Young Tennekoon fulfilled this early promise, obtaining first class honours in civil engineering from the University of Peradeniya in 1965. There were many Thomians who entered the engineering faculty with him, including Shanthi Kumar Rasaratnam (now holding an MBE for services to water engineering in the UK), Mano Ponniah (who later played first class cricket for Cambridge and All-Ceylon), and Gerard Rodrigo (subsequently a Marxist development economist).

Lal Tennekoon went on to complete his PhD at Cambridge University in 1970, on the behaviour of foundations on sandy soils. Other notable Peradeniya graduates/academics who completed PhDs in Cambridge around this time included Alagiah Thurairajah (1962, on shear properties of soils), Munidasa Ranaweera (1969, on the finite element method applied to limit analysis) and Vickramabahu Karunaratne (1970, on plasma physics) – halcyon days for Peradeniya engineering, no doubt. For six years after his PhD, Tennekoon was attached to the Faculty of Engineering at Peradeniya, teaching at both undergraduate and postgraduate levels. He joined the Katubedda Campus of the University of Sri Lanka in 1975 and became a Professor of Civil Engineering at the University of Moratuwa in 1984 and Senior Professor in 1994. Moratuwa was fortunate to obtain his services. When I once suggested that his moving to Moratuwa was a result of “the best people gravitating to the best places”, his rejoinder was that he would have found it difficult, after he got married to Preethi, to keep pace with Thurairajah’s work ethic in the Peradeniya soil mechanics lab!

He guided the fortunes of the Civil Engineering Department as its Head from 1980 to 1985, during which time the annual undergraduate intake was increased from 50 to 100, and a new civil engineering complex was constructed to accommodate that increase. He also steered the Faculty of Engineering as its Dean for 10 months in 1994/1995, when there was sharp division in the university regarding the continuation of the NDT programme within the Faculty.

Professor Tennekoon’s main research interests were based around the problems facing the geotechnical engineers of this country. These were in the areas of: (i) Shallow foundations in low lying areas containing peat and organic clays; (ii) Pile foundations terminating on rock; (iii) Landslides and the stabilisation of slopes; and (iv) Site Investigations for all types of civil engineering structures. He also chaired the Moratuwa University’s Senate Research Committee from around 1998 to 2002 and was responsible for setting up the Research Awards Scheme, which contributed significantly to raising research quality at the university.

Over his illustrious career, he provided assistance to many development projects in the country during their planning, design and construction stages, in the collection and interpretation of geotechnical data. Notable contributions have been in (i) the Environmental Improvement Project for the city of Colombo; (ii) the Southern Highway Project from Colombo to Matara; (iii) the Beira Lake Restoration Project; and (iv) several multi-storeyed building projects such as Ceylinco Celestial Towers, Crescat Towers, HNB Tower, Bank of Ceylon Tower, Central Bank Tower and Havelock City Project. He worked closely with Geotech (Pvt) Ltd, where his close friend Eng. Parakrama Jayasinghe was Managing Director. At times he enlisted the services of his colleagues, most of them his juniors. The consideration paid by this senior engineer to the disciplinary competencies of his younger associates only served to increase our own reciprocal respect for him.

Professor Tennekoon served as the principal author for the development of two standards for the Institute of Construction Training and Development (ICTAD), in which his research findings were also incorporated. The two standards were in the areas of ‘Site Investigation’, and ‘Pile foundations end bearing on rock’; and were published by the Sri Lanka Standards Institution (SLSI). He was a Founder Member of the Sri Lanka Geotechnical Society (SLGS) in 1987; and held its Presidency from 1994 to 2000. He was recognised for his contributions to the Geotechnical Engineering profession in Sri Lanka by the SLGS at an International Conference organised by the Society in 2007. The Institution of Engineers Sri Lanka bestowed on him an Award for Excellence in 2008. He was elected a Fellow of the National Academy of Sciences of Sri Lanka in 2013.

In April 2003, Professor Tennekoon was invited by the Government of Sri Lanka to be part of a team for implementing the World Bank funded project for the Improvement of Relevance and Quality of Undergraduate Education (IRQUE). This was a 6-year project where the major component was the establishment of a Quality Enhancement Fund (QEF). This was to be a strategy in which quality and relevance were to be improved through the entire university system by the implementation of a competitive funding scheme. Professor Tennekoon was responsible for the implementation of this QEF component, which often involved choosing between competing study programmes. His dispassionate judgment and clinical impartiality ensured the smooth operation of this project; it also endeared him to virtually the entire university community in Sri Lanka. Some of us wondered whether he was deserting his primary calling to engineering through this involvement, but he was only broadening his horizons. He later became passionate about outcome based engineering education, and chaired the Accreditation Board of the Institution of Engineers, Sri Lanka, responsible for accrediting engineering programmes under the Washington Accord.

Twenty eight years ago, Lal Tennekoon suffered a massive heart attack and was in the intensive care unit for many days. His loving wife Preethi and his children Layanthi and Banuka rarely left the hospital premises, at times camping out on its staircases, as I recall. Theirs was clearly a very loving family. How fortunate that we all got him back from the brink of death. From a private communication he circulated to some of us soon after, I am aware that he was extremely grateful to all who attended on, ministered to and prayed for him. He himself looked after his wife caringly, eschewing all professional and other engagements, towards the end of her life. Preethi’s demise hastened his own.

Professor Lal Tennekoon was an illustrious but utterly unpretentious and much loved academic; a greatly sought after and highly respected geotechnical consultant; and a passionate advocate for outcome based engineering education. His twin concerns for practice oriented research on the one hand and engineering education on the other, continue to be nurtured by those he engaged with. His geotechnical expertise endures in the careers of his one-time students, all now emeritus or full professors themselves – Professor Anuruddha Puswewala (rock mechanics); Professor Athula Kulathilake (slope stability); Professor Saman Thilakasiri (piled foundations); Professor Udeni Nawagamuwa (environmental geotechnics); and Professor Nalin de Silva (shallow foundations).

Professor Priyan Dias (a student and later colleague of Professor Lal Tennekoon)



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Ranking public services with AI — A roadmap to reviving institutions like SriLankan Airlines

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Efficacy measures an organisation’s capacity to achieve its mission and intended outcomes under planned or optimal conditions. It differs from efficiency, which focuses on achieving objectives with minimal resources, and effectiveness, which evaluates results in real-world conditions. Today, modern AI tools, using publicly available data, enable objective assessment of the efficacy of Sri Lanka’s government institutions.

Among key public bodies, the Supreme Court of Sri Lanka emerges as the most efficacious, outperforming the Department of Inland Revenue, Sri Lanka Customs, the Election Commission, and Parliament. In the financial and regulatory sector, the Central Bank of Sri Lanka (CBSL) ranks highest, ahead of the Securities and Exchange Commission, the Public Utilities Commission, the Telecommunications Regulatory Commission, the Insurance Regulatory Commission, and the Sri Lanka Standards Institution.

Among state-owned enterprises, the Sri Lanka Ports Authority (SLPA) leads in efficacy, followed by Bank of Ceylon and People’s Bank. Other institutions assessed included the State Pharmaceuticals Corporation, the National Water Supply and Drainage Board, the Ceylon Electricity Board, the Ceylon Petroleum Corporation, and the Sri Lanka Transport Board. At the lower end of the spectrum were Lanka Sathosa and Sri Lankan Airlines, highlighting a critical challenge for the national economy.

Sri Lankan Airlines, consistently ranked at the bottom, has long been a financial drain. Despite successive governments’ reform attempts, sustainable solutions remain elusive.

Globally, the most profitable airlines operate as highly integrated, technology-enabled ecosystems rather than as fragmented departments. Operations, finance, fleet management, route planning, engineering, marketing, and customer service are closely coordinated, sharing real-time data to maximise efficiency, safety, and profitability.

The challenge for Sri Lankan Airlines is structural. Its operations are fragmented, overly hierarchical, and poorly aligned. Simply replacing the CEO or senior leadership will not address these deep-seated weaknesses. What the airline needs is a cohesive, integrated organisational ecosystem that leverages technology for cross-functional planning and real-time decision-making.

The government must urgently consider restructuring Sri Lankan Airlines to encourage:

=Joint planning across operational divisions

=Data-driven, evidence-based decision-making

=Continuous cross-functional consultation

=Collaborative strategic decisions on route rationalisation, fleet renewal, partnerships, and cost management, rather than exclusive top-down mandates

Sustainable reform requires systemic change. Without modernised organisational structures, stronger accountability, and aligned incentives across divisions, financial recovery will remain out of reach. An integrated, performance-oriented model offers the most realistic path to operational efficiency and long-term viability.

Reforming loss-making institutions like Sri Lankan Airlines is not merely a matter of leadership change — it is a structural overhaul essential to ensuring these entities contribute productively to the national economy rather than remain perpetual burdens.

By Chula Goonasekera – Citizen Analyst

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Why Pi Day?

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International Day of Mathematics falls tomorrow

The approximate value of Pi (π) is 3.14 in mathematics. Therefore, the day 14 March is celebrated as the Pi Day. In 2019, UNESCO proclaimed 14 March as the International Day of Mathematics.

Ancient Babylonians and Egyptians figured out that the circumference of a circle is slightly more than three times its diameter. But they could not come up with an exact value for this ratio although they knew that it is a constant. This constant was later named as π which is a letter in the Greek alphabet.

Archimedes

It was the Greek mathematician Archimedes (250 BC) who was able to find an upper bound and a lower bound for this constant. He drew a circle of diameter one unit and drew hexagons inside and outside the circle such that the sides of each hexagon touch the sides of the circle. In mathematics the circle passing through all vertices of a polygon is called a ‘circumcircle’ and the largest circle that fits inside a polygon tangent to all its sides is called an ‘incircle’. The total length of the smaller hexagon then becomes the lower bound of π and the length of the hexagon outside the circle is the upper bound. He realised that by increasing the number of sides of the polygon can make the bounds get closer to the value of Pi and increased the number of sides to 12,24,48 and 60. He argued that by increasing the number of sides will ultimately result in obtaining the original circle, thereby laying the foundation for the theory of limits. He ended up with the lower bound as 22/7 and the upper bound 223/71. He could not continue his research as his hometown Syracuse was invaded by Romans and was killed by one of the soldiers. His last words were ‘do not disturb my circles’, perhaps a reference to his continuing efforts to find the value of π to a greater accuracy.

Archimedes can be considered as the father of geometry. His contributions revolutionised geometry and his methods anticipated integral calculus. He invented the pulley and the hydraulic screw for drawing water from a well. He also discovered the law of hydrostatics. He formulated the law of levers which states that a smaller weight placed farther from a pivot can balance a much heavier weight closer to it. He famously said “Give me a lever long enough and a place to stand and I will move the earth”.

Mathematicians have found many expressions for π as a sum of infinite series that converge to its value. One such famous series is the Leibniz Series found in 1674 by the German mathematician Gottfried Leibniz, which is given below.

π = 4 ( 1 – 1/3 + 1/5 – 1/7 + 1/9 – ………….)

The Indian mathematical genius Ramanujan came up with a magnificent formula in 1910. The short form of the formula is as follows.

π = 9801/(1103 √8)

For practical applications an approximation is sufficient. Even NASA uses only the approximation 3.141592653589793 for its interplanetary navigation calculations.

It is not just an interesting and curious number. It is used for calculations in navigation, encryption, space exploration, video game development and even in medicine. As π is fundamental to spherical geometry, it is at the heart of positioning systems in GPS navigations. It also contributes significantly to cybersecurity. As it is an irrational number it is an excellent foundation for generating randomness required in encryption and securing communications. In the medical field, it helps to calculate blood flow rates and pressure differentials. In diagnostic tools such as CT scans and MRI, pi is an important component in mathematical algorithms and signal processing techniques.

This elegant, never-ending number demonstrates how mathematics transforms into practical applications that shape our world. The possibilities of what it can do are infinite as the number itself. It has become a symbol of beauty and complexity in mathematics. “It matters little who first arrives at an idea, rather what is significant is how far that idea can go.” said Sophie Germain.

Mathematics fans are intrigued by this irrational number and attempt to calculate it as far as they can. In March 2022, Emma Haruka Iwao of Japan calculated it to 100 trillion decimal places in Google Cloud. It had taken 157 days. The Guinness World Record for reciting the number from memory is held by Rajveer Meena of India for 70000 decimal places over 10 hours.

Happy Pi Day!

The author is a senior examiner of the International Baccalaureate in the UK and an educational consultant at the Overseas School of Colombo.

by R N A de Silva

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Sheer rise of Realpolitik making the world see the brink

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A combined US-Israel attack on Iran.(BBC)

The recent humanly costly torpedoing of an Iranian naval vessel in Sri Lanka’s Exclusive Economic Zone by a US submarine has raised a number of issues of great importance to international political discourse and law that call for elucidation. It is best that enlightened commentary is brought to bear in such discussions because at present misleading and uninformed speculation on questions arising from the incident are being aired by particularly jingoistic politicians of Sri Lanka’s South which could prove deleterious.

As matters stand, there seems to be no credible evidence that the Indian state was aware of the impending torpedoing of the Iranian vessel but these acerbic-tongued politicians of Sri Lanka’s South would have the local public believe that the tragedy was triggered with India’s connivance. Likewise, India is accused of ‘embroiling’ Sri Lanka in the incident on account of seemingly having prior knowledge of it and not warning Sri Lanka about the impending disaster.

It is plain that a process is once again afoot to raise anti-India hysteria in Sri Lanka. An obligation is cast on the Sri Lankan government to ensure that incendiary speculation of the above kind is defeated and India-Sri Lanka relations are prevented from being in any way harmed. Proactive measures are needed by the Sri Lankan government and well meaning quarters to ensure that public discourse in such matters have a factual and rational basis. ‘Knowledge gaps’ could prove hazardous.

Meanwhile, there could be no doubt that Sri Lanka’s sovereignty was violated by the US because the sinking of the Iranian vessel took place in Sri Lanka’s Exclusive Economic Zone. While there is no international decrying of the incident, and this is to be regretted, Sri Lanka’s helplessness and small player status would enable the US to ‘get away with it’.

Could anything be done by the international community to hold the US to account over the act of lawlessness in question? None is the answer at present. This is because in the current ‘Global Disorder’ major powers could commit the gravest international irregularities with impunity. As the threadbare cliché declares, ‘Might is Right’….. or so it seems.

Unfortunately, the UN could only merely verbally denounce any violations of International Law by the world’s foremost powers. It cannot use countervailing force against violators of the law, for example, on account of the divided nature of the UN Security Council, whose permanent members have shown incapability of seeing eye-to-eye on grave matters relating to International Law and order over the decades.

The foregoing considerations could force the conclusion on uncritical sections that Political Realism or Realpolitik has won out in the end. A basic premise of the school of thought known as Political Realism is that power or force wielded by states and international actors determine the shape, direction and substance of international relations. This school stands in marked contrast to political idealists who essentially proclaim that moral norms and values determine the nature of local and international politics.

While, British political scientist Thomas Hobbes, for instance, was a proponent of Political Realism, political idealism has its roots in the teachings of Socrates, Plato and latterly Friedrich Hegel of Germany, to name just few such notables.

On the face of it, therefore, there is no getting way from the conclusion that coercive force is the deciding factor in international politics. If this were not so, US President Donald Trump in collaboration with Israeli Rightist Premier Benjamin Natanyahu could not have wielded the ‘big stick’, so to speak, on Iran, killed its Supreme Head of State, terrorized the Iranian public and gone ‘scot-free’. That is, currently, the US’ impunity seems to be limitless.

Moreover, the evidence is that the Western bloc is reuniting in the face of Iran’s threats to stymie the flow of oil from West Asia to the rest of the world. The recent G7 summit witnessed a coming together of the foremost powers of the global North to ensure that the West does not suffer grave negative consequences from any future blocking of western oil supplies.

Meanwhile, Israel is having a ‘free run’ of the Middle East, so to speak, picking out perceived adversarial powers, such as Lebanon, and militarily neutralizing them; once again with impunity. On the other hand, Iran has been bringing under assault, with no questions asked, Gulf states that are seen as allying with the US and Israel. West Asia is facing a compounded crisis and International Law seems to be helplessly silent.

Wittingly or unwittingly, matters at the heart of International Law and peace are being obfuscated by some pro-Trump administration commentators meanwhile. For example, retired US Navy Captain Brent Sadler has cited Article 51 of the UN Charter, which provides for the right to self or collective self-defence of UN member states in the face of armed attacks, as justifying the US sinking of the Iranian vessel (See page 2 of The Island of March 10, 2026). But the Article makes it clear that such measures could be resorted to by UN members only ‘ if an armed attack occurs’ against them and under no other circumstances. But no such thing happened in the incident in question and the US acted under a sheer threat perception.

Clearly, the US has violated the Article through its action and has once again demonstrated its tendency to arbitrarily use military might. The general drift of Sadler’s thinking is that in the face of pressing national priorities, obligations of a state under International Law could be side-stepped. This is a sure recipe for international anarchy because in such a policy environment states could pursue their national interests, irrespective of their merits, disregarding in the process their obligations towards the international community.

Moreover, Article 51 repeatedly reiterates the authority of the UN Security Council and the obligation of those states that act in self-defence to report to the Council and be guided by it. Sadler, therefore, could be said to have cited the Article very selectively, whereas, right along member states’ commitments to the UNSC are stressed.

However, it is beyond doubt that international anarchy has strengthened its grip over the world. While the US set destabilizing precedents after the crumbling of the Cold War that paved the way for the current anarchic situation, Russia further aggravated these degenerative trends through its invasion of Ukraine. Stepping back from anarchy has thus emerged as the prime challenge for the world community.

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