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Punkahs in the house of a British couple in India c. 1880
A punkah in the house of French colonials in Indochina c. 1930
Church interior with an intricate system of punkahs c. 1900

A punkah, also pankha (Urdu: پَنکھا, Hindi: पंखा, paṅkhā), is a type of fan used since the early 6th century BC. The word pankha originated from pankh, the wings of a bird which produce a current of air when flapped.

History

[edit]

In its original sense in the Indian subcontinent, pankha (a Hindi word) typically describes a handheld fan made from a single frond of palm or a woven square of bamboo strips, rattan or other plant fibre, that can be rotated or fanned. These small handheld devices are still used by millions when ceiling fans stop working during frequent power outages.

In the colonial age, the word came to be used in British India and elsewhere in the tropical and subtropical world for a large swinging fan, fixed to the ceiling, pulled by a punkah wallah during hot weather.[1] To cover a larger area, such as the inside of an office or a courthouse, a number of punkahs could be connected together by strings so that they would swing in unison. The material used could range from utilitarian rattan to expensive fabrics. The date of this invention is not known, but it was familiar to the Arabs as early as the 8th century.[1] It was not commonly used in India before the end of the 18th century.[1]

The electric fan largely supplanted it in barracks and other large buildings at the beginning of the 20th century.[1]

Legacy

[edit]

The term punkah louvre refers to the directional outlet for cool air in aircraft, particularly those over the passenger seats.

In India, the punkhawallah or pankha wallah was the servant who operated the fan, often using a pulley system.[2]

  • French Indochina courtroom equipped with punkah fans
    French Indochina courtroom equipped with punkah fans
  • A punkah in an antebellum house in Natchez, Mississippi
    A punkah in an antebellum house in Natchez, Mississippi
  • Decorative punkah fans at a hotel in Abu Dhabi (UAE)
    Decorative punkah fans at a hotel in Abu Dhabi (UAE)

See also

[edit]

References

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Punkah

View on Grokipedia
from Grokipedia
A punkah is a manually operated fan consisting of a large rectangular frame covered in cloth or , suspended from the by ropes or cords, and swung back and forth by pulling a attached cord to create a cooling breeze in hot environments. The term derives from the word paṅkhā, meaning "fan," which traces back to the pakṣa for "wing," reflecting its mimicry of bird wings generating air movement. Primarily associated with the , punkahs evolved from ancient handheld fans to ceiling-mounted versions by the 17th century, providing essential ventilation before widespread electrification. In and other outposts during the 18th and 19th centuries, punkahs became a staple in elite residences, courtrooms, barracks, and public buildings, where dedicated servants known as punkah-wallahs—often from lower castes or marginalized groups—labored continuously in sweltering conditions to operate them via long cords run through walls or pulleys. This system highlighted stark social hierarchies, as European colonials and affluent locals relied on the exhaustive manual effort of subordinates, sometimes selecting workers who were deaf to minimize distractions or overheard conversations. Punkahs also appeared in the antebellum American South, where enslaved individuals pulled similar ceiling fans in dining rooms, enabling them to eavesdrop on owners' discussions amid the physically demanding task. The advent of electric fans in the late 19th and early 20th centuries rendered traditional punkahs obsolete in most practical settings, though decorative versions persist in some modern hotels and heritage sites as nods to historical cooling methods. Their legacy underscores pre-industrial adaptations to tropical climates and the labor dynamics of colonial and economies, where technological simplicity amplified human exploitation for comfort.

Design and Features

Physical Structure and Materials

The punkah features a rectangular frame typically constructed from cane or flat wooden slats, providing structural rigidity while remaining lightweight for suspension and . This frame is covered with a taut layer of cloth, which serves as the primary surface for displacing air during manual operation. In some traditional variants, particularly pre-colonial forms, the covering consisted of large palm fronds or woven plant materials such as strips or , offering natural suited to humid climates. The frame is suspended from the ceiling by or chains attached along its top edge, enabling horizontal swinging motion across the room. A cord or is tied to one end of the punkah, often routed through a pulley system or a hole in the adjacent wall, allowing a operator to pull it rhythmically without entering the . Colonial adaptations frequently employed durable fabrics like stretched over the frame for enhanced longevity and uniformity in institutional settings such as courts and residences. These materials balanced airflow generation with resistance to wear from constant use in tropical environments.

Variations and Adaptations

Punkahs exhibited variations in size, materials, and operation to suit different environments and needs. Smaller handheld versions, often ornate and made from cloth, fronds, or woven , were used individually at dining tables in early 19th-century , while larger ceiling-mounted swing punkahs, typically rectangular frames of cane or covered in cloth, served rooms and public spaces. In the of the , punkahs—sometimes spelled "punka"—adapted for plantation dining rooms featured solid wooden panels, such as , suspended from ceilings and pulled via ropes to create a see-saw motion for cooling and fly deterrence, often operated by enslaved individuals until the early at sites like Melrose in . Larger iterations appeared in churches and , such as those in 1840s , , to ventilate congregations or troops over expansive areas. Mechanistic adaptations included pulley systems for smoother operation and early , with steam-driven punkahs documented in palaces by 1819 and electrical versions emerging around 1909. Contemporary revivals, like the Sensu Punkah introduced in 2008, employ computer-controlled electric motors to simulate pendular blade swings, producing draft-free airflow with features such as , LED lighting, and safety sensors, diverging from manual pulling while echoing the gentle ventilation of originals for modern homes and offices. These modifications prioritized efficiency and privacy, such as relocating pull cords through walls to separate operators from occupied rooms, reflecting practical responses to labor and climatic demands across regions from to colonial outposts.

Historical Development

Ancient and Pre-Colonial Origins

The punkah, a manually operated fan, traces its etymological roots to the Hindi term pankha, derived from the Sanskrit pakṣa meaning "wing," reflecting its mimicry of bird wings to generate airflow. Handheld precursors, often made from palm fronds, peacock feathers, or cloth stretched over frames, appear in ancient Indian iconography and texts, such as depictions of attendants fanning royalty in Gupta-era (c. 320–550 CE) sculptures and earlier Vedic references to cooling devices for elites in hot climates. These manual fans served both practical and symbolic roles, denoting status among rulers and priests, with archaeological evidence from Indus Valley sites (c. 2500 BCE) suggesting early use of leaf-based ventilators in urban dwellings. The mechanized ceiling-suspended form, consisting of a wooden frame or slab hung by ropes and pulled to swing back and forth, emerged later in the Arab around the 8th century CE, where it was termed marwaha al-khaish or "bad air fan," designed to circulate air in palaces amid arid conditions. This innovation likely spread to the via Persian trade and cultural exchanges by the medieval period, predating European colonial influence. In pre-colonial India, particularly during the (1526–1857), such swinging punkahs were installed in royal durbars, havelis, and zenanas, operated by cord-pulling attendants to mitigate summer heat in regions like the Deccan and Gangetic plains, as evidenced by architectural remnants in forts like and . Pre-colonial adaptations emphasized local materials like khus grass-infused fabrics for added evaporative cooling and frames for durability, with operation often tied to court hierarchies where dedicated servants ensured constant motion during assemblies. These devices represented an empirical response to India's , prioritizing causal airflow over decorative excess, though their labor-intensive nature reinforced . Unlike later colonial versions, indigenous punkahs integrated with , such as screens for enhanced ventilation, demonstrating sustained pre-British refinement through iterative use in princely states.

Colonial Era Adoption and Popularization

The punkah, adapted from indigenous South Asian handheld fans known as pankha, was transformed into a ceiling-suspended, rope-pulled device by British officers in the late , who suspended rectangular frames or table-tops from ceilings to generate airflow via attendants pulling cords. This innovation addressed the challenges of tropical heat for European residents, evolving from solutions in private quarters to standardized installations in public and institutional settings. Adoption accelerated in the military context during the , when punkahs became essential in housing European soldiers, mitigating heat-related illnesses amid expanded British troop deployments post the (1839–1842) and subsequent consolidations in . By 1848, colonial administration formalized their use, allocating budgets for punkahs and dedicated operators (punkah-wallahs) in offices, courtrooms, churches, hospitals, and , reflecting their integration into everyday colonial infrastructure. Popularization extended to civilian households over the mid-19th century, particularly in urban centers like Calcutta, where demand for punkah labor surged with the growth of European expatriate communities and architecture designed around . By the 1860s, punkahs were ubiquitous in elite colonial residences, offices, and even ships, symbolizing adaptations to subtropical climates that enabled prolonged European presence; this era saw their to other tropical outposts, including and settlements, though remained the epicenter.

Decline and Replacement

The punkah's prominence waned in the late 19th and early 20th centuries as electric fans emerged, offering automated cooling without manual labor. Initial of fans occurred in the 1880s, with inventors adapting rotary mechanisms to electric motors, but adoption accelerated after 1900 when infrastructure expanded in colonial territories. In places like , electric fans began supplanting punkahs as early as the late 1890s, driven by urban and the unreliability of human-operated systems during extended use. By the early 20th century, the punkah had become largely obsolete in favor of electric alternatives, which provided consistent airflow independent of punkah wallahs and were less prone to fatigue-induced inconsistencies. This shift aligned with broader industrialization, reducing dependence on low-wage manual servants and enabling scalability in homes, offices, and public spaces across and . Punkahs lingered in rural or electricity-scarce areas into the mid-20th century, but post-colonial investments, including widespread grid expansion by the 1950s in , finalized their replacement. The electric ceiling fan's superiority stemmed from its rotary blades generating directed airflow more efficiently than the punkah's linear swinging motion, which primarily dispersed hot air without significant temperature reduction. Economic factors, including lower long-term costs and elimination of labor disputes over punkah , further hastened , though preserved examples persist in historic sites as relics of pre-electric cooling.

Operation and Usage

Mechanism of Operation

The punkah functions as a manually operated oscillating fan, where a large rectangular frame—typically constructed from wood and covered with cloth, palm fronds, or matting—is suspended horizontally from the by two cords or pivots attached to its upper edge, allowing it to hang like a . A separate operating cord is affixed to the lower edge along one side of the frame, often routed through a system mounted on the wall or to enable remote activation from outside the room. Operation relies on rhythmic pulling of the cord by an attendant known as a punkah-wallah, who stands in an adjacent space and tugs the line to tilt and propel the punkah forward, creating a sweeping motion that displaces air downward and generates a cooling breeze across the occupied area. Upon releasing tension, the punkah's momentum causes it to swing back, after which the process repeats in a continuous typically at a rate of 40 to 60 swings per minute, depending on the operator's pace and the device's size, which could span 6 to 12 feet in length to cover dining halls or courtrooms effectively. This swinging action mimics a , leveraging and to sustain without mechanical power, though the depends on the punkah-wallah's skill in maintaining even pulls to avoid abrupt stops or excessive noise from the frame's pivots. In some adaptations, multiple cords along the edge distributed the pulling force more evenly, reducing strain on the fabric and allowing for larger installations in high-ceilinged colonial buildings. The mechanism's required no tools beyond the human operator, making it suitable for pre-electricity eras in tropical climates where stationary fans proved insufficient for circulating air over groups.

Daily Practices and Settings

Punkahs were deployed across diverse settings in , initially in public institutions including courtrooms, , churches, hospitals, and offices to facilitate cooling during official proceedings, military routines, religious services, and administrative work. In elite private residences, they were installed in dining rooms, living areas, and bathrooms, expanding by the early to cover nearly all habitable spaces for sustained occupant comfort. Operation integrated into daily routines through manual activation by punkah wallahs, who employed rope-pulley systems to induce rhythmic swinging, typically from adjacent rooms, verandahs, or external positions to preserve while generating consistent . Pullers worked in shifts, often 8 hours, using hands or feet while positioned , ensuring continuous motion during meals, extended meetings, and evening activities. Seasonal deployment aligned with climatic demands, commencing in March and persisting through October in most regions, with year-round and nocturnal use in hotter locales or to support health and productivity amid tropical conditions. By the mid-19th century, such practices extended to contexts, where punkah coolies operated fans day and night in European soldiers' quarters following 1840s reforms prioritizing troop welfare.

Social and Economic Aspects

Role of Punkah Wallahs

Punkah wallahs served as the dedicated manual operators of punkahs, tasked with pulling cords or ropes attached to the fan's frame to generate a continuous swinging motion that dispersed air and mitigated heat in indoor environments. This role demanded sustained physical effort, often involving rhythmic tugs to maintain an even breeze, and was performed in settings ranging from residential bungalows and government offices to courtrooms and during the British colonial period in . Operators typically positioned themselves in room corners or adjacent spaces, adjusting pulls based on occupant needs to direct airflow effectively. Recruited predominantly from lower-caste groups, including sweepers and former palanquin bearers, punkah wallahs ranked low in the colonial servant , reflecting the labor divisions enforced under British rule. Their duties frequently spanned extended shifts, including overnight vigils to ventilate sleeping quarters, thereby facilitating European acclimatization to tropical climates through what has been termed a "sleep economy" reliant on Indian manual labor. Preference was often given to deaf candidates, as operators remained in close auditory range of private conversations among employers. In operational practice, punkah wallahs coordinated with body servants to relocate or adapt the fan's motion as masters shifted rooms, ensuring uninterrupted service across households or public venues. Collective resistance emerged in events like the 1898 strike, where operators protested inadequate wages and harsh conditions, underscoring the physically taxing and undervalued nature of the work amid rising demands for mechanical alternatives.

Labor Conditions and Exploitation Claims

Punkah wallahs, typically lower-caste Indian laborers such as former sweepers or palanquin-bearers, endured monotonous and physically taxing work involving continuous rope-pulling to operate the fans, often in teams alternating shifts of up to 12 hours in humid, sweltering conditions during the hottest months. To ensure vigilance and prevent dozing, European employers imposed deliberate discomforts, such as positioning pullers in cramped, unventilated spaces exposed to direct heat or withholding rest breaks, which exacerbated fatigue and risks like muscle strain and dehydration. Wages for punkah wallahs in the mid-19th century averaged around four rupees per month, equivalent to approximately five shillings in British currency, reflecting their low socioeconomic status and the era's domestic labor norms, though this provided minimal sustenance amid rising living costs in colonial urban centers. Daily rates for temporary hires could dip to three annas (1/16 of a rupee) per day or night shift, underscoring the undervaluation of their role despite its necessity for colonial comfort. Claims of systemic exploitation portray punkah wallahs as dehumanized "machines" denied basic necessities like adequate , , or , with some accounts alleging employers prioritized uninterrupted service over worker welfare, fostering resentment that culminated in organized resistance such as the 1898 strike in parts of demanding higher pay and improved conditions. These narratives, often drawn from post-colonial , emphasize caste-based recruitment and coercive oversight as hallmarks of colonial labor extraction, though contemporary records indicate such practices aligned with broader patterns rather than unique to punkah work. No verified evidence supports widespread mortality or abuse beyond standard occupational hazards, but the asymmetry of power—where pullers serviced sleeping masters through the night—fueled perceptions of inequity.

Effectiveness and Criticisms

Cooling Efficacy

The punkah's primary mechanism for cooling involves generating oscillatory air movement that promotes convective from the body and enhances sweat , thereby lowering the perceived temperature without altering ambient air conditions. Experimental assessments in controlled enclosures measured air velocities averaging 114 feet per minute across operational openings, yielding flow rates of up to 890 cubic feet per minute (CFM) for standard doorway or wall punkahs operated at 30 strokes per minute. This airflow effectively reduced thermal stratification, maintaining vertical temperature gradients below 1°F and achieving drops of 1.4°F to 6.4°F over 1.5 to 3 hours in dead-end rooms, depending on configuration and initial conditions. Larger punkah variants, such as 6-foot models oscillating at 25-26 times per minute, demonstrated capacities exceeding 4600 CFM at minimal power equivalents (0.04-0.05 horsepower if mechanized), which lowered effective temperatures by 1 to 5°F in auxiliary spaces through improved air mixing and distribution. These results highlight punkahs' utility in ventilating enclosed environments, with heat removal rates around 770 Btu per hour in tested setups, though outcomes varied with operator diligence and inlet air quality. In practical applications, punkahs excelled in dry tropical climates by amplifying evaporative cooling, rendering high ambient temperatures (up to 40°C) more tolerable via sustained breezes that prevented stagnant hot air pockets. However, their effectiveness waned in humid settings, where limited evaporation curtailed the chilling effect, and overall comfort hinged on continuous operation to sustain velocities sufficient for bodily heat dissipation. Historical deployments in colonial-era buildings confirmed this, as the devices provided essential relief in dining halls and barracks, enabling occupancy during peak heat by circulating air across multiple occupants.

Limitations and Abuses

The punkah's operational limitations stemmed primarily from its dependence on human , which introduced variability and unreliability into its performance; punkah wallahs often grew fatigued during extended shifts, leading to inconsistent swinging and reduced airflow, especially at night when servants were prone to drowsiness or absenteeism. Contemporary observers in critiqued the device as offering scant cooling relief in confined rooms, deeming it effective mainly for mosquito deterrence or outdoor sleeping rather than substantive temperature reduction or air circulation. Additionally, the punkah's fixed installation restricted its adaptability to varying room sizes or layouts, and its rhythmic motion could generate noise disruptive to concentration or sleep, further diminishing its practicality in non-dining or non-courtroom settings. Abuses associated with punkahs centered on the dehumanizing treatment of punkah wallahs, who endured grueling, monotonous labor—often 12- to 18-hour shifts in sweltering conditions—while being denied basic sustenance, rest periods, or fair wages, effectively reducing them to extensions of the machinery they operated. Colonial employers routinely inflicted physical punishments, such as beatings with ropes or sticks, for any perceived slowdowns in pulling, fostering an environment of fear and that prioritized European comfort over worker welfare. This exploitation was compounded by the task's inherent physical demands, which caused chronic back strain and exhaustion among wallahs, many of whom were low-caste or impoverished recruits coerced into the after initial resistance from servants unwilling to perform such degrading work. Such practices reflected broader colonial labor hierarchies, where punkah operation sustained imperial acclimatization but at the expense of systemic worker degradation, with minimal oversight or legal recourse available to the afflicted.

Legacy and Influence

Technological Successors

The punkah's manual operation was rendered obsolete by the advent of electric fans, which automated air circulation and eliminated the need for dedicated laborers, beginning in the late and accelerating in the early 20th. These devices directly addressed the punkah's core function of generating a gentle breeze in hot climates but leveraged electric motors for continuous, hands-free performance, reducing operational costs and dependency on human pullers whose strikes, such as the 1898 labor action in , highlighted systemic inefficiencies. The foundational electric ceiling fan emerged from innovations in the United States, with Philip Diehl patenting a design in 1889 after adapting a sewing machine motor to drive blades mounted on the ceiling in 1887. In British , where punkahs had been ubiquitous in colonial residences and courts, electric fans were initially imported for elite use around the , providing reliable cooling without the rhythmic interruptions of rope-pulled systems. production ramped up in the 1930s through firms like Crompton Greaves and Usha, making electric fans accessible beyond expatriate circles and hastening the punkah's decline amid electrification efforts. Subsequent refinements, including metal blades replacing early bamboo or wooden ones and the shift to rotary rather than strictly oscillating designs, enhanced efficiency and durability, solidifying electric fans as the punkah's enduring technological heir. By the mid-20th century, these fans had proliferated globally, with adaptations like variable speeds and reversible motors further optimizing airflow in diverse environments once reliant on manual fans.

Cultural and Terminological Remnants

The term pankha, from which "punkah" derives, persists in modern and other South Asian languages to denote fans generally, including electric ceiling and table models, reflecting its ancient roots in pakṣa meaning "." This linguistic continuity underscores the device's evolution from feather-based handheld implements to broader cooling appliances, with pankha evoking traditional forms in cultural contexts like religious rituals. In ventilation engineering, "punkah louvre" endures as a specialized term for adjustable directional vents delivering high-velocity air in ships, buildings, and , with origins traceable to the and applications in early 20th-century naval and mercantile designs. These devices, named for their emulation of the punkah's air-circulating function, appear in preserved maritime artifacts, such as those at the in Greenwich. Culturally, punkahs survive as artifacts in heritage sites and museums, particularly in former colonial settings. In the antebellum American South, original 19th-century punkahs remain installed in museums like Rosedown State Historic Site, where they symbolize pre-electric cooling and associated labor dynamics, contributing to and reproductions for . In , traditional pankhas—often smaller handheld variants—are occasionally employed during power outages for their reliability in rural or outage-prone areas, while larger ceiling forms feature in exhibitions like Jatin Das's 2018 display of over 5,000 fans at the Indira Gandhi National Centre for the Arts, highlighting artisanal continuity. The Indian Postal Service issued stamps in 2017 depicting regional pankha styles from states including and , preserving visual and material heritage. These remnants evoke for pre-mechanical cooling in and oral histories, though functional use has largely yielded to electrification.

References

  1. https://www.merriam-webster.com/dictionary/punkah
  2. https://www.oed.com/dictionary/punkah_n
  3. https://www.thehindu.com/children/a-short-history-of-the-ceiling-fan/article65749141.ece
  4. https://mapacademy.io/article/punkah/
  5. https://www.deccanherald.com/features/art-and-culture/a-sordid-story-of-exploitation-3615679
  6. https://www.amusingplanet.com/2019/09/punkah-hand-operated-ceiling-fans-of.html
  7. https://www.atlasobscura.com/articles/punkah-project-fans-antebellum-south
  8. https://indianfanassociation.com/category/history-of-fan/
  9. https://servantspasts.wordpress.com/2020/08/10/the-punkah-and-its-pullers-a-short-history/
  10. https://bamboou.com/crafting-a-beautiful-indian-inspired-punkah-fan/
  11. http://www.dsource.in/gallery/making-pankha
  12. https://theprint.in/pageturner/excerpt/punkahwallahs-and-white-sahibs-in-colonial-india/2626698/
  13. https://vintagedesigns.com/id/rm/dining/punka/index.htm
  14. https://www.thesensupunkah.com/
  15. https://www.core77.com/posts/105210/The-Sensu-Punkah-A-Ceiling-Fan-That-Flaps-Instead-of-Rotating
  16. https://enrouteindianhistory.com/keeping-it-cool-a-look-into-the-rich-legacy-of-pankha/
  17. https://medium.com/exploring-history/ceiling-fans-during-the-early-times-95df273a3d4a
  18. https://dtnext.in/news/city/fans-that-stopped-the-british-from-leaving-india-762460
  19. https://www.scmp.com/comment/letters/article/1032492/hongkongers-used-live-comfortably-without-air-cons
  20. https://indianfanassociation.com/the-modern-world-has-brought-the-pankahs-from-the-colonial-raj-back/
  21. https://maddy06.blogspot.com/2012/07/fans-and-punkhas.html
  22. https://www.thefridaytimes.com/28-Feb-2020/punkah-wallahs-1900
  23. https://scroll.in/article/1028513/amidst-uk-heatwave-a-reminder-of-how-british-colonials-exploited-punkah-walas-in-indias-summers
  24. https://journals.sagepub.com/doi/10.1177/00194646211064592
  25. https://boards.straightdope.com/t/how-much-did-punkka-wallahs-earn/506086
  26. https://puronokolkata.com/2014/07/27/hanging-punkaha-calcutta-c1786-90/
  27. https://apps.dtic.mil/sti/tr/pdf/AD0670950.pdf
  28. https://apps.dtic.mil/sti/tr/pdf/AD0667911.pdf
  29. https://pubmed.ncbi.nlm.nih.gov/38580427/
  30. https://shs.cairn.info/revue-d-histoire-de-l-energie-2022-2-page-1c?lang=fr&tab=resume
  31. https://m.economictimes.com/industry/miscellaneous/view-the-past-and-possible-future-of-punkahs/articleshow/68748849.cms
  32. https://journals.sagepub.com/doi/abs/10.1177/00194646211064592
  33. https://www.crompton.co.in/blogs/fans-guide/all-about-ceiling-fans-their-invention-history-and-evolution
  34. https://indianfanassociation.com/indian-fan-industry-how-it-all-began/
  35. https://artsandculture.google.com/story/keeping-it-cool-novel-cooling-devices-of-india-mode/lgVBYmrvdb_lJg?hl=en
  36. https://www.staticelectrics.com.au/electricians-blog/history-of-the-ceiling-fan/
  37. https://www.wisdomlib.org/definition/pankha
  38. https://gaatha.com/indian-hand-fan-pankha/
  39. https://www.oed.com/dictionary/punkah-louvre_n
  40. https://shiphistory.org/2017/09/20/ventilation-and-ac/
  41. https://www.rmg.co.uk/collections/objects/rmgc-object-18509
  42. https://www.facebook.com/photo.php?fbid=10153587220174139&id=191241394138&set=a.10151469849214139
  43. https://go.gale.com/ps/i.do?id=GALE%257CA457228516&sid=googleScholar&v=2.1&it=r&linkaccess=abs&issn=19360886&p=AONE&sw=w
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