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The changing role of the teacher

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A representational picture (Courtesy IPS)

by Deshamanya Dr Indira Lilamani Ginige
Former Deputy Director General
National Institute of Education

The simple and static societies of the past becoming complex and dynamic over time, has brought about a paradigm shift in the role of the teacher. The purpose of this article is to make the readers aware on how the transmission role of the teacher that was there at the beginning changed over to transaction after World War II, to cater to the rapid developments of an industrial era, and later to transformation to meet the new needs of the post-industrial era. Considering the fact that the majority of our teachers are still in their traditional roles, the writer intends to compare the three teacher roles under 10 selected themes to expedite the movement of the teachers to their new role of transformation.

With all three teacher roles under consideration starting with a “T,” it is the 3T Model that is used today to introduce the changing role of the teacher from transmission to transaction first, and from transaction to transformation later. Let us now try to identify the contents of the 3T model by finding answers to the philosophical question ‘Why children come to school?’ with respect to each of the three eras, and also by conducting a comparative analysis of the characteristics of the three teacher roles on the basis of the 10 themes selected.

The children of the pre-industrial era that changed very slowly, have come to school to get the knowledge available to the teacher to adopt as it is. Although the children of the industrial era have also attended school for the same reason, the changing circumstances of the day have not allowed them to use the knowledge they acquired from the teacher, as it is. The rapid developments that were taking place after World War II have called these children to adapt the knowledge received from the teacher as suitable to the context. The children of the post-industrial era, however, do not come to school to get the knowledge available to the teacher. These children attend school to seek for new knowledge and meaning to prepare for a future that is becoming highly complex and dynamic. All this brings to light that it is the changing situations from time to time that has brought about a change in the role of the teacher.

Identifying paradigm shift

Let us now try to identify the paradigm shift that has taken place in the role of the teacher on the basis of the 10 themes that are referred to as Emphasis, Basis, Mode of learning and teaching. Titles given to the teacher, Titles given to the pupils, Class setting, Communication patterns, Use of inputs, Assessment, and Evaluation.

The first teacher role of transmission also referred to as the jug and the mug method and the chalk and the talk method, emphasized teacher and teaching over and above pupil and learning. With the latter coming forward in the next era, both teacher and teaching, and pupil and learning have come to the same platform, resembling the two sides of a coin. In the third era of transformation, the original emphasis has changed totally to bring the pupil and learning to the fore, while pushing the traditional concepts of teacher and teaching to the back.

First role of transmission

The teachers conducting the first role of transmission have come to class well prepared to talk on the basis of a list of topics that are pre-determined. The teachers playing the transaction role, acting differently, have come to class with a lesson plan developed to realize three types of objectives coming under cognitive, affective and psychomotor domains of education. The teachers of today, who are expected to play the transformation role have to consider the learning activity as the basis of pupil learning. These activities planned with focus on competency levels drawn from the syllabus, attempt to achieve two types of competencies referred to as subject competencies and generic competencies. The subject competencies derived from the subject integrate knowledge, attitudes and skills related to the subject. The generic competencies derived from the learning-teaching process, on the other hand, contribute to the development of a whole lot of soft skills classified under inter personal and intra personal.

The teachers, who played the transmission role in the simple and static societies of the past, have used the lecture as their main mode of teaching. The teachers moving into the transaction role in the mid era of rapid development, acting differently, have used the questioning method to support the dialogue and the discussion that formed the heart of learning and teaching. The knowledge explosion that is taking place at an alarming rate today, invites the present teachers to accept student exploration as the main mode of learning. The pupils thus getting involved in problem-based learning, have ample opportunity to develop the four learning skills – creativity, critical thinking, collaboration and communication – referred to as the 4C’s.

The titles given to the teacher have also changed with the changing times. The teachers imparting knowledge under the first role of transmission have been transmitters. The teachers raising questions one after the other to keep their classes going, in the second role of transaction, have acted as facilitators. The teachers playing the transformation role today, who are expected to intervene in pupil learning as and when necessary, are called resource persons.

The changing role of the teacher has also brought about a change in the titles given to the pupils. This group of stakeholders paying attention to lectures under the first role of transmission have been mere listeners. The pupils answering questions raised by the teacher first, and later by the peers in the second role of transaction, have functioned as respondents. The same group taking the responsibility for a variety of tasks under the new role of transformation are referred to as thinkers, information seekers, communicators, collaborators, explorers, sharers and elaborators of exploration findings, and evaluators.

The seating arrangement in the classroom is another aspect that has changed over time. The traditional classrooms of the first era have got the pupils to sit in rows to listen to lectures. The dialogue and the discussion that came forward in the second era, have called for a slight modification in the above seating arrangement. Class settings such as the semi-circle and the horseshoe that have resulted, had been mainly to promote the eye contact of the teacher as a means of facilitating responses from each and every child in the classroom. The activity-oriented learning that has come forward today, starts with the whole class to engage the pupils for learning. Small groups formed next to make the explorations productive, and the whole class formed once again to facilitate the sharing and elaboration of exploration findings, have put an end to the fixed seating arrangements that have existed in our classrooms for long.

Changes in communication patterns

It is also important for you to get an idea of the changes that have occurred in the communication patterns at the classroom level. With the teachers transmitting knowledge to their pupils, the traditional classrooms have had only uni-directional communication. The dialogue and the discussion method that has come forward in the second era has called for bi-directional communication to initiate the transaction, and multi-directional communication to take it forward. The transformational role of the teacher that begins with transaction and ends with transmission, with group work at the middle, employs a variety of communication patterns. By- and multi-directional communication at the beginning enables the teachers to engage the pupils for learning, within group communication in the middle facilitates pupil exploration, among group communication taking place next helps the pupils to involve themselves in explanations and elaborations of group findings, and the uni-directional communication at the end, allows the teacher to provide a summary for the children on what they have learnt.

It is also important for you to know how the use of inputs has also changed overtime. The teachers playing the first role of transmission have had no need for special inputs. The facilities in the classroom, have been more than enough for them to adopt the chalk and the talk method to impart the knowledge available to them. The teachers playing the transaction role, however, have needed some inputs mainly to initiate the dialogue at the beginning of each lesson. Nevertheless, the transformation role of the teacher, much more advanced than the first two roles of transmission and transaction, requires a variety of inputs to implement the activities planned. At the beginning of every activity, the teachers need inputs to engage the pupils for learning.

In the second step of the activity, they seek for inputs to facilitate the group exploration planned for their pupils. Towards the end of the activity, the teachers need inputs again to make both the sharing and elaboration of exploration findings meaningful. They also seek for inputs at the end to enable a summary for the pupils on what they have learned. All this brings to light that the paradigm shifts that have taken place in the role of the teacher have called for more and more inputs to support the instructional process that is turning to be more and more complex.

The last two items to which your attention will be drawn are the ways in which the teachers of different eras have attended to assessment and evaluation. Out of these two tasks referred to as evaluation for learning and evaluation of learning, let us begin by paying our attention to evaluation for learning that provides another name for assessment.

The teachers of the first era, who imparted knowledge to their pupils through continuous talk, had no opportunity to understand how their pupils were learning. This situation did not allow these teachers to make any assessment of their pupils with a view to providing them with the learning support they needed. The teachers playing the transaction role, who posed questions to pupils continuously to receive answers, however, had some opportunity to understand where their pupils were. This situation allowed these teachers to support pupil learning by changing their questions to suit the attainment levels of the pupils under concern.

However, the teachers of today, who have to play the transformation role are not expected to transfer the knowledge available to them to their pupils, either through talk or questioning. Instead, their task is to motivate the pupils to find out new knowledge and meaning by themselves. These teachers, getting free during the time devoted for group explorations, are expected to remain in their classes, move from group to group to observe the pupils at work, and involve themselves in the task of assessment where they are expected to provide feedback to their pupils to overcome weaknesses, and feedforward to uplift strengths. All this brings to light that the teachers benefitting much from assessment that has come forward in the new era, can no longer stick to their traditional roles, where they have no or limited opportunity for such intervention.

Evaluation

All teachers of the past imparting knowledge to their pupils either through transmission or transaction, conducted an evaluation at the end of each lesson. The main purpose of this evaluation was to find out the extent to which the pupils have grasped the knowledge imparted to them either through lecture or questions raised. The teachers of the first two eras, who were implementing their transmission and transaction roles, used a few questions at the end of each lesson as a means of conducting the evaluation of learning. Happy with the right answers they received from the pupils, who had followed the lesson, these teachers were in the practice of ignoring the attainment levels of the majority of pupils, who were normally silent.

The teachers playing the new role of transformation getting the opportunity to listen to their pupils during the explanation and elaboration stages of each activity, however, are in a good position to experience what their pupils have learnt. Continuous evaluation thus taking place in every activity, supplemented by formative evaluations conducted at different points of the activity continuum and summative evaluations at its end, enable the pupils to demonstrate better performance, not only in the year-end examinations conducted by the schools, but also in the high stakes testing for which the Department of Examinations is responsible.

By now you may have realized that the new teacher role of transformation has not forgotten the basic features of the two previous teacher roles of transaction and transmission. Proving this fact, the transformation role of the teacher starts with a dialogue leading to a discussion, which is the main characteristic of the transaction role, and ends with a brief lecture referred to as a lecturette, resembling the main mode of teaching in the transmission role. The transformation role of the teacher thus nourished with the characteristics of the two previous teacher roles, also demonstrating a number of other features specific to itself towards the middle part of the learning process, is far advanced than the two roles of the past.

Among the other factors that contribute to this specialty, the steps dealing with exploration, explanation and elaboration take an important place with assessment supporting pupil learning during explorations, and evaluation, accompanying both explanation and elaboration, assisting the teachers to find out the extent to which the pupils have learnt. Thus, the transformation role of the teacher that has come forward to prepare the pupils of today for the challenges of the 21st century, is much wider in scope when compared to the two previous teacher roles. Considering all this, it is a must for everybody involved in a teaching career today to embrace this new role of transformation at their earliest convenience.



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The Ramadan War

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Benjamin Netanyahu, Donald Trump and Mojtaba Khamenei

A Strategic Assessment of a Conflict Still Unresolved

The Unites States of America and its ally, Israel attacked Iran on 28 February, or the 10th day of the month of Ramadan. More than a month of intense fighting has passed since, and the Ramadan War has settled into a grinding, attritional struggle that defies early declarations of victory. Despite sustained U.S. and Israeli air and naval bombardment, Iran remains standing, and continues to strike back with a level of resilience that has surprised many observers. The conflict has evolved into a contest of endurance, adaptation, and strategic innovation, with each side attempting to impose costs the other cannot bear.

Iran’s response to the overwhelming airpower of its adversaries has been both simple and devastatingly effective: saturate enemy defences with swarms of inexpensive drones and older ballistic missiles, forcing them to expend costly interceptors and reveal radar positions, and then follow up with salvos of its most advanced precisionguided missiles. This layered approach has inflicted severe physical damage on Israel and has shaken its national morale. The country has endured repeated missile barrages from Iran and rocket fire from Hezbollah, straining its airdefence network and pushing its civilian population to the limits of endurance.

The United States, meanwhile, has been forced to evacuate or reduce operations at several bases in the Gulf region due to persistent Iranian drone and missile attacks. For both the U.S. and Israel, the war has become a test of strategic credibility. For Iran, by contrast, victory is defined not by territorial gains or decisive battlefield outcomes, but by survival, and by continuing to impose costs on its adversaries.

The central strategic objective for the U.S. has now crystallised: reopening the Strait of Hormuz to secure global energy flows. Ironically, the Strait was open before the war began; it is the conflict itself that has rendered it effectively closed. Air and naval power alone cannot achieve this objective. The geography of the Strait, combined with Iran’s layered defences, means that any lasting solution will require ground forces, a reality that carries enormous risks.

U.S. Strategic Options

The United States faces five broad operational options, each with significant drawbacks.

1. Seizing Kharg Island

Kharg Island handles roughly 90% of Iran’s oil exports, making it an attractive target. However, it lies only a short distance from the Iranian mainland, where entrenched Iranian forces maintain dense networks of missile batteries, drones, artillery, and coastal defences. Any attempt to seize Kharg would require first neutralising or capturing the adjacent coastline, a costly amphibious and ground operation.

Even if successful, this would not reopen the Strait of Hormuz. It would merely deprive Iran of export capacity, which is not the primary U.S. objective. At least ostensibly not; there are those who argue that the U.S. simply wants to take over Iran’s petroleum (see below).

2. Forcing the Strait of Hormuz by Naval Power

Sending U.S. naval forces directly through the Strait is theoretically possible but operationally hazardous. Iran has mined all but a narrow channel hugging its own shoreline. That channel is covered by overlapping fields of antiship missiles, drones, artillery, and coastal radar. Clearing the mines would require prolonged operations under fire. Attempting to push through without clearing them would risk catastrophic losses.

3. Capturing Qeshm, Hengam, Larak, and Hormuz Islands

These islands dominate the Iranian side of the Strait and host radar, missile, and drone installations. Capturing them would degrade Iran’s ability to close the Strait, but the islands are heavily fortified, and the surrounding waters are mined. Amphibious assaults against defended islands are among the most difficult military operations. Even success would not guarantee the Strait’s longterm security unless the mainland launch sites were also neutralised.

4. Invading Southern Iraq and Crossing into Khuzestan

This option would involve U.S. forces advancing through southern Iraq, crossing the Shatt alArab waterway, and pushing into Iran’s Khuzestan province — home to most of Iran’s oilfields. The terrain is difficult: marshes, waterways, and narrow approaches. Iranian forces occupy the high ground overlooking the plains.

While this route would allow Saudi armoured forces to participate, it would also expose U.S. and allied logistics to attacks by Iraqi Shia militias, who have already demonstrated their willingness to target U.S. assets. The political and operational risks are immense.

5. Capturing Chabahar and Advancing Along the Coast

The most strategically promising — though still costly — option is seizing the port of Chabahar in southeastern Iran and advancing roughly 660 kilometres along the coast toward Bandar Abbas. This approach offers several advantages:

· Distance from Iran’s core population centres complicates Iranian logistics.

· Chabahar’s deepwater port (16m draught)

would provide a valuable logistics hub.

· U.S. carriers could remain at safer standoff distances

, supporting operations without entering the Strait.

· The coastal route allows naval gunfire and missile support

to assist advancing ground forces.

· Local Baluchi insurgents

could provide intelligence and limited support.

· Capturing Bandar Abbas would

outflank Iran’s island defences and effectively reopen the Strait.

This option is likely to form the backbone of any U.S. ground campaign, potentially supplemented by diversionary attacks by regional partners to stretch Iranian defences.

The Limits of U.S. Superiority

The United States retains overwhelming superiority in naval power and manned airpower. But whether this advantage translates into dominance in unmanned systems or ground combat is far from certain.

The 2003 invasion of Iraq is often cited as a model of U.S. military prowess, but the comparison is misleading. Iraq in 2003 had been crippled by a decade of sanctions. Its forces lacked modern mines, antitank missiles, and effective air defences. Tank crews had little training; some could not hit targets at pointblank range. RPG teams were similarly unprepared. The U.S. enjoyed numerical superiority in the theatre and total control of the air, allowing it to isolate Iraqi units and prevent reinforcement.

Even under those favourable conditions, Iraqi forces managed to delay the U.S. advance. At one point, forward U.S. units nearly ran out of ammunition and supplies, forcing the diversion of forces intended for the assault on Baghdad to secure the lines of communication.

Iran is not Iraq in 2003. Its armed forces and industrial base have adapted to nearly half a century of sanctions. It produces its own drones, missiles, artillery, and armoured vehicles. It has built extensive underground facilities, hardened command posts, and redundant communication networks.

Moreover, the battlefield itself has changed. The RussoUkrainian war demonstrated that deep armoured penetrations – once the hallmark of U.S. doctrine – are now extremely vulnerable to drones, loitering munitions, and precision artillery. The result has been a return to attritional warfare reminiscent of the First World War, with front lines stabilising into trench networks.

Yet, as in the First World War, stalemate has been broken not by massed assaults but by small, highly trained teams infiltrating thinly held lines, identifying targets, and guiding drones and artillery onto enemy positions deep in the rear. Iran has studied these lessons closely.

Mosaic Defence and Transformational Warfare

Iran’s military doctrine has evolved significantly over the past two decades. Its “mosaic defence” decentralises command and control, ensuring that even if senior leadership is targeted, local units can continue operating autonomously. This structure proved resilient during the initial waves of U.S. and Israeli strikes.

Iran has also absorbed lessons from U.S. “shock and awe” operations. The botched U.S. invasion of Grenada in 1983 exposed weaknesses in joint operations, prompting the development of “effectsbased operations,” “rapid dominance” and the broader concept of “transformational warfare.” These doctrines (better known colloquially as “Shock and Awe”), influenced by Liddell Hart and Sun Tzu, emphasised simultaneous strikes on strategic targets to paralyse the enemy’s decisionmaking.

While the U.S. struggled to apply these concepts effectively in Iraq and Iran, Tehran has adapted them for asymmetric use. Its drone and missile campaigns have targeted not only military assets but also economic infrastructure and psychological resilience. Israel’s economy and morale have been severely tested, and the United States finds itself entangled in a conflict that offers no easy exit.

Iran has also pursued a broader strategic objective: undermining the petrodollar system that underpins U.S. financial dominance. By disrupting energy flows and encouraging alternative trading mechanisms, Iran seeks to weaken the economic foundations of U.S. power.

Will the USA Achieve Its War Aims?

The United States’ core objective appears to be securing control over global energy flows by reopening the Strait of Hormuz and limiting China’s access to Middle Eastern oil before it can transition to alternative energy sources. Whether this objective is achievable remains uncertain.

A ground campaign would be long, costly, and politically fraught. Iran’s defences are deep, layered, and adaptive. Its drone and missile capabilities have already demonstrated their ability to impose significant costs on technologically superior adversaries. Regional allies are cautious, and global support for a prolonged conflict is limited.

The United States retains overwhelming military power, but power alone does not guarantee strategic success. Iran’s strategy is simple: survive, adapt, and continue imposing costs. In asymmetric conflicts, survival itself can constitute victory.

In Frank Herbert’s Dune, the protagonist, Paul Muad’dib says “he who can destroy a thing, controls a thing.” This is the essence of Iranian strategy – they have a stranglehold on petroleum supply, and can destroy the world economy. Trump has had to loosen sanctions on both Iran’s and Russia’s oil, simply to prevent economic collapse.

The Ramadan War has already reshaped regional dynamics. Whether it reshapes global power structures will depend on how the next phase unfolds, and whether the United States is willing to pay the price required to achieve its aims.

by Vinod Moonesinghe

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Nayanandaya:A literary autopsy of Sri Lanka’s Middle Class

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“Nayanandaya,” meaning the enchantment of indebtedness, is Surath de Mel’s latest novel. True to his reputation as a maximalist writer, de Mel traverses the labyrinth of middle-class struggles; poverty, unemployment, the quest for education, through a father’s fragile dreams. The novel unfolds around Mahela, his son, his friendships, and the fragile relationships that keep him tethered to life.

“Happiness is not a destination; it is a journey. There are no shortcuts to it. At some point, the path you thought was right will be wrong. You have to make sacrifices for it.”

These words, uttered by the protagonist Mahela to his ten-year-old son, is the silent mantra of every middle-class parent. A common urban middle-class father’s yearning for his child to climb the ladder he himself could not ascend.

A Socio-Political Mirror

Sri Lanka’s middle class remains trapped in paradox. They are educated but underemployed, salaried but indebted, socially respected yet politically invisible. Structural inequalities, economic volatility and populist politics inclusively contribute to keep them “forever middle”.

Through protagonist Mahela, who is sometimes a graphic designer, sometimes a vendor and always a failure Surath de Mel sketches the deficiencies of an education system that does not nurture skills of the students. Sri Lanka boasts about high literacy rates, yet the economy cannot absorb the thousands of graduates produced into meaningful work. Underemployment becomes the inheritance of the middle class. With political connections often the stories can be transformed. De Mel pens it in dark humour to expose these truths:

“Some notorious writer once sneered in a newspaper, ‘Give your ass to the minister, and you’ll earn the right to keep it on a bigger chair.’ Countless people waiting in ministers’ offices, pressing

their backsides to seats, carrying the weight of their own lives.”

Childhood Trauma and Its Echoes

Surath de Mel frequently weaves psychoanalysis into his fiction. In Nayanandaya, he captures the lingering shadows of childhood trauma. Mahela, scarred by a loveless and fractured youth, suffers phobic anxiety and depression, apparently with a personality disorder as an adult. His confession at the psychologist reveals it out:

“Childhood? I didn’t have one. I was fifteen when I was born.”

Here, Mahela marks his true birth not at infancy, but at the death of his parents. This statement itself reveals the childhood trauma the protagonist had gone through and the reader can attribute his subsequent psychological struggles as the cause of it.

Surath de Mel

From a Lacanian perspective, trauma is not just something that happens to a child; it is a deep break in how the child understands the world, themselves, and others. Some experiences are too painful to be put into words. Lacan calls this the Real — what cannot be fully spoken or explained. This pain does not disappear but returns later in life as anxiety, fear, or obsessive compulsive disorder.

This trauma disturbs the child’s sense of self and their place in society. When language fails to make sense of loss, the mind creates fantasies to survive. These fantasies quietly shape adult desires, relationships, and choices.

In Nayanandaya, childhood trauma of the protagonist does not stay buried — it lives on, shaping the adulthood in unseen ways. In the narrative, Mahela’s struggles are not just personal failures but the result of a past that was never given words.

Tears of Fathers – Forgotten in Sri Lankan Literature

Sri Lankan literature has long been attentive to suffering — especially rural poverty, social injustice, and the silent endurance of women and single mothers. Countless novels, poems, and songs have given voice to maternal sacrifice, female resilience, and women’s oppression.

Yet, within this rich narratives, the quiet grief of the urban middle-class father remains mostly unseen. Rarely does fiction pause to examine the emotional lives of men who shoulder responsibility without language for their pain. These masculine tears are private, swallowed by routinely and masked by humour or silence. Definitely never granted literary space.

In Nayanandaya, Surath de Mel breaks this silence. Through Mahela, he lends voice to these overlooked men — fathers whose love is expressed through sacrifice rather than speech. However, de Mel does not romanticise the tears. Rather he humanises them. He allows their vulnerabilities, anxieties, and quiet despair to surface with honesty and compassion. In doing so, Nayanandaya fills a striking gap in Sri Lankan literature, reminding us that fathers, too, carry invisible wounds.

Literary value

With Nayanandaya, Surath de Mel reaches a new pinnacle in his literary craft. His language is dense yet lyrical, enriched with similes, metaphors, irony, and a full range of literary tools deployed with confidence and control.

One of the novel’s most touching narrative choices is the personification of Mahela’s son’s soft toy, Wonie. Through personified Wonie, de Mel captures the two most touching incidents in the entire novel . This simply reveals the author’s artistic maturity, transforming a simple object into a powerful emotional conduit that anchors the novel’s tenderness amidst its despair.

At a deeper symbolic level, Mahela himself can be read as more than an individual character, but a metaphor for Sri Lanka — a nation struggling under economic hardship, clinging to impractical dreams, witnessing the migration of its people, and drifting towards a slow, painful exhaustion. His personal failures could mirror the broader decay of social and economic structures. This symbolic reading lends Nayanandaya a haunting national resonance.

Today, many write and many publish, but only a few transform language into literature that lingers in the reader’s mind long after the final page. Surath de Mel belongs to that rare few. In a literary landscape crowded with voices, he remains devoted to art rather than popularity or trend. As a scholar of Sinhala language and literature, de Mel writes with intellectual depth, dark humour, and deep human empathy.

In conclusion, Nayanandaya is not merely a story; it is social commentary, psychoanalytic reflection, and tragic poetry woven into richly textured prose. With this novel — a masterful interlacing of love, debt, and fragile dreams — Surath de Mel engraves a distinctly Dostoevskian signature into Sinhala literature.

Reviewed by Dr. Charuni Kohombange

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Domestic Energy Saving

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Around 40 percent of the annual energy we use is consumed in domestic activities. Energy is costly, and supply is not unlimited. Unfortunately, we realize the importance of energy – saving only during the time of a crisis.

If you adopt readily affordable energy-saving strategies, you will cut down your living expenditure substantially, relieving the energy burden of the nation. Here are some tips.

Cooking:

Cooking consumes a good portion of domestic energy demand and common practices, and negligence leads to 30 – 40 percent wastage. A simple experiment revealed that the energy expenditure in boiling an egg with the usual unnecessary excess water in an open pan is nearly 50 percent higher than boiling in a closed lid pan with the minimal amount of water. In an open pan, a large quantity of heat is lost via convection currents and expulsion of water vapor, carrying excessive amounts of heat energy (latent heat of vaporisation). Still, most of us boil potatoes for prolonged intervals of time in open receptacles, failing to realise that it is faster and more efficient to boil potatoes or any other food material in a closed pan. About 30 – 40 percent of domestic cooking energy requirements can be cut down by cooking in closed-lid pans. Furthermore, food cooked in closed pans is healthier because of less mixing with air that causes food oxidation. Fat oxidation generates toxic substances. In a closed- lid utensil (not tightly closed), food is covered with a blanket of water vapor at a positive pressure, preventing entry of air and therefore food oxidation.

Overcooking is another bad habit that not only wastes energy but also degrades the nutritional value of food.

Electric kettle:

For making morning or evening tea or preparing tea to serve a visitor. Do not pour an unnecessarily large quantity of water into the electric kettle. Note that the energy needed to make 10 cups of tea is ten times that of one cup.

Electric Ovens:

Avoid the use of electric ovens as far as possible. Remember that foods cooked at higher temperatures are generally unhealthy, and even carcinogens are formed when food is fried at higher temperatures in an oven. If ever you need to bake something in an oven, limit the number of times you open the door. Use smaller ovens adequate for the purpose and not larger ones just for fashion.

Refrigerators:

Refrigerators consume lots of energy. Do not use over-capacity refrigerators just for fashion. Every time you open the fridge, more electricity is used to reset the cooling temperature. Plan your access to the appliance accordingly. Check whether the doors are properly secured and there are no leakages. Keep the fridge in a cooler location, not hit by direct sunlight and away from warmer places in the kitchen. Remember that turning off the fridge frequently will not save energy, instead it draws more energy.

Use of gas burners:

Do not use oversized utensils. Keep the lid closed as far as possible to prevent the escape of heat. Remember that excessive amounts of heat energy are carried away by a large surface-area conducting utensil. Do not open the gas vent to allow the flame to flash outside the vessel. A flame not impinging on the pan would not heat it, and gas is wasted. Ensure that the flame is blue. Frequently check whether gas vents are clogged with rust and carbon. Frequently, cooking material in the pan drops into the gas vents, and salt there corrodes the gas vents. Cleaning and washing would be necessary. Do not prolong cooking, taking time to prepare ingredients and adding them to the pan intermittently. Add ingredients at once and before switching the burner. If the preparation of a dish is prolonged to slow the cooking, use earthenware pots rather than metallic ones. An earthenware pot, being thermally less conducting retain heat.

Firewood for cooking:

Do not attempt to eliminate the use of firewood in cooking. If you are living in a village area, the exclusive use of LPG gas is an unnecessary expenditure. Large smoke-free, efficient oven designs are now available. If you are compelled to use gas, keep the option of firewood ovens, especially for prolonged cooking. Admittedly, there are locations, especially in cities, where the use of firewood is unsuited.

Hot water showers:

Before installing hot water showers, reconsider whether they are really necessary in a hot tropical climate. Go for solar water heaters, although the installation cost is high. Instant water heaters consume much less electricity compared to geysers with water tanks. Now, cheap and safe instant water heaters are available.

Lighting:

Arrange and design your residence to optimise daytime illumination until late evening. If you are constructing a new house, take this issue into account. Use LED lamps, which provide the same illumination for 85 percent less energy. In study rooms and areas that require prolonged illumination, paint the walls white. Angle – poised LED lamps with very low voltage are available. Use them for reading and studies. Routinely clean the surfaces of all lamps. Dust deposition cuts off light.

Air conditioning and ventilation:

Air conditioning consumes prohibitively large quantities of electrical energy. You can avoid air conditioning by optimising ventilation. The principle is to have air entry points (windows) in the house near the ground level and exit points (vents or windows) near the roof. Ground level is cooler, and the region near the roof is warmer. Thus, a cool air current enters the house near the ground level and hot air is drawn by the vents near the roof. The region near the ground can be rendered cooler by planting trees. Architectural designs are available to optimise this effect. You can sense the direction of air motion by holding a thin strip of paper near the windows at the ground and near the roof level. In addition to ceiling fan, install exhaust fans in the upper points of the house to remove hot air and draw cooler air through windows near the ground. Reduce the amount of sunlight hitting the roof by shading with trees. There are techniques for increasing the reflectance of the roof with paints and other designs.

Transportation:

A good portion of your budget is drained by transportation. Irrespective of who you are, use public transport if convenient and available. As much as possible, use the telephone and email to get your things done. If the officers do not comply for no valid reason, complain. Plan your trips to the town to do several things at the same time. Whenever possible, plan to share transport. Buy energy – efficient small vehicles. Routinely examine your vehicle for energy efficiency, i.e. correct tire pressure etc.

Charge electric vehicles off peak hours. Slow charging reduces heat generation in the circuit, reducing energy loss.

Energy is costly and limited in supply. Everything you do consumes energy. Be energy conscious in all your deeds. That attitude will reduce your expenditure, lessen the environmental degradation and financial burden of the nation in importing fuel.

Educating the general public is the most effective way of implementing energy-saving strategies.

By Prof. Kirthi Tennakone
(kenna@yahoo.co.uk)

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