Nearly Waterless Washing Machine to Debut in 2009

first_img Scientists map high-risk areas for hepatitis E This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Researchers at Leeds University designed the machine, which will be marketed by a spin-off company called Xeros Ltd (which means “dry” in Greek). Company founder Stephen Burkinshaw, a professor of textile chemistry, explains that the machine will reduce both water and energy consumption. Currently, washing machine use accounts for 13 percent of daily household water consumption in the UK, or about 21 liters (5.5 gallons) of water per day, according to the UK organization Waterwise. Besides saving water, the Xeros machine uses just 2% of the energy of a conventional washing machine. And since clothes come out nearly dry, they don´t require the use of a dryer.”We have shown that it can remove all sorts of everyday stains, including coffee and lipstick, while using a tiny fraction of the water used by conventional washing machines,” Burkinshaw said.When doing a load of wash, users throw their clothes in like a normal washing machine. Then a cartridge in the back of the machine adds plastic chips – about 45 pounds (20 kg) of them – to the load. Next, a cup of water containing the detergent is added. After the water dissolves the dirt, the chips absorb the water, without the need for a rinse or spin cycle. When finished, a grill at the bottom of the machine opens to collect the chips.According to Xeros, the chips can last for about 100 loads of laundry, or about six months for an average family. The company has not yet provided details on what the chips are made of, or how easily and safely the chips can be disposed of or recycled.Working with Leeds University´s commercialization partner IP Group, Xeros has secured an investment of almost 500,000 pounds ($984,400) for the project. The price of the Xeros washing machines for consumers is “not expected to be dramatically different from (conventional) washing machines,” according to the company.More information: www.XerosLtd.comvia:InventorSpot, Reuters Xeros Ltd’s washing machine uses less than 2 percent of the water and energy of a conventional machine. Citation: Nearly Waterless Washing Machine to Debut in 2009 (2008, July 29) retrieved 18 August 2019 from https://phys.org/news/2008-07-waterless-machine-debut.html Explore further A new washing machine that uses just a cup of water, a pinch of detergent, and about 1,000 small plastic chips to clean clothes may be available for consumers in the UK next year.last_img read more

A new metric to capture the similarity between collider events

first_img Citation: A new metric to capture the similarity between collider events (2019, August 9) retrieved 18 August 2019 from https://phys.org/news/2019-08-metric-capture-similarity-collider-events.html A static illustration of the optimal transport between two jets from the CMS Open Data. Credit: Komiske, Metodiev & Thaler. Explore further “Our research is motivated by a remarkably simple question: When are two particle collisions similar?” Eric Metodiev, one of the researchers who carried out the study, told Phys.org. “At the Large Hadron Collider (LHC), protons are smashed together at extremely high energies and each collision produces a complex mosaic of particles. Two collider events can look similar, even if they consist of different numbers and types of particles. This is analogous to how two mosaics can look similar, even if they are made up of different numbers and colors of tiles.”In their study, Metodiev and his colleagues set out to capture the similarity between collider events in a way that is conceptually useful for particle physics. To do this, they employed a strategy that merges ideas related to optimal transport theory, which is often used to develop cutting-edge image recognition tools, with insights from quantum field theory, a construct that describes fundamental particle interactions. “Our new result is a quantitative method to determine the distance (via a ‘metric’) between two collision events,” Metodiev said. “Once you know the distance between every pair of collider events, you can then triangulate the entire space of LHC data. We hope this way of processing information from the LHC will yield new insights into the fundamental interactions of nature.”Essentially, the metric developed by the researchers represents the ‘work’ required to rearrange one collider event into another. It is based on the EMD, a method that is typically used to develop computer vision tools that compare the similarities between two objects or images. EDM works by trying to rearrange one event into another by moving “dirt,” or in this case particle energies, around. Typically, the more work is required to successfully perform this rearrangement, the more two events, objects or images are dissimilar. “The reason why this notion of similarity is so useful in particle physics is that it aligns with the way that we perform theoretical calculations,” Patrick Komiske, another researcher involved in the study, told Phys.org. “In quantum field theory, you cannot predict exactly what will happen in any particular collision event, but you can predict the probability to produce certain patterns of particle debris. To define what you mean by a pattern, though, you need a notion of similarity, which turns out to be exactly what our metric provides.” PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Seeking new physics, scientists borrow from social networks “Having a universal notion of similarity between events is very useful for a variety of collider tasks,” Metodiev said. “One common task at the LHC is to classify different types of collisions, in the same way as you would classify an image as containing a cat, dog, or unicorn. Using our metric to classify jets as arising from a quark, gluon, or something more exotic, we achieve a performance that approaches that of modern machine learning techniques.”In a series of evaluations, the researchers demonstrated the effectiveness of their method in capturing the similarity of collider events. Their technique achieved remarkable results, with accuracy levels comparable to those attained by state-of-the-art machine learning models. In addition to potentially helping researchers to classify collider events, the metric developed by Metodiev and his colleagues could be used to visualize collider data in an entirely new way. Traditionally, in particle physics, researchers focus on a single attribute of a collection of collider events (i.e. the ‘forest’) or at the detailed properties of one individual collider event (i.e. the ‘trees’). Since the new metric allows users to group similar collider events together, it enables the observation of the ‘forest’ and individual ‘trees’ simultaneously, by identifying events that best capture the main features of the dataset as a whole.”In addition, from a more mathematical perspective, once you have a notion of distance, you can study the geometry of the space of events, which provides a new way to think about existing concepts in collider physics dating back to the 1970s,” Metodiev added. “For example, to avoid infinities in quantum field theory calculations, one simply has to ensure that the event geometry is sufficiently smooth, without any singular points. In the future, we plan to develop new collider observables and techniques based on this geometric perspective.”The metric developed by Metodiev, Komiske and Thaler could have numerous interesting applications. It could even be used to search for irregularities in LHC datasets using a strategy known as anomaly detection, which could ultimately help to unearth new physics evidence. In the short term, the researchers plan to use their metric to rediscover known aspects of the standard model in the new geometric language they proposed. Ultimately, however, their technique could unveil evidence of the existence of new particles or forces, as well as previously unknown aspects of the standard model itself. “With our notion of similarity, we can identify not only the most common event configurations, but also the most exotic ones, and it possible that these exotic events could provide hints for physics beyond the standard model,” Thaler told Phys.org. “We are currently working on benchmarking this idea with public collider data. Since 2014, the CMS experiment at the LHC has been releasing subsets of their data for unrestricted use, including all of the information necessary to calculate our metric. This gives us an opportunity to explore the space of events on real collider data.” More information: Patrick T. Komiske et al. Metric Space of Collider Events, Physical Review Letters (2019). DOI: 10.1103/PhysRevLett.123.041801journals.aps.org/prl/abstract/ … ysRevLett.123.041801 Journal information: Physical Review Letters © 2019 Science X Network Researchers at the Massachusetts Institute of Technology (MIT) have recently developed a metric that can be used to capture the space of collider events based on the earth mover’s distance (EMD), a measure used to evaluate dissimilarity between two multi-dimensional probability distributions. The metric they proposed, outlined in a paper published in Physical Review Letters, could enable the development of new powerful tools to analyze and visualize collider data, which do not rely on a choice of observables. Play An animation showing three jets (from the CMS Open Data) forming a “triangle” in the space of events. The animation shows the rearrangement of one jet into another. Credit: Komiske, Metodiev & Thaler. In their paper, Metodiev, Komiske and their colleague Jesse Thaler specifically applied their metric to jets; sprays of particles that commonly arise from high-energy quarks and gluons. While the properties of individual jets have been studied extensively for over the past four decades, their metric allowed the researchers to study the relationship between pairs of jets, thus unveiling new and complementary information about the jet formation process. last_img read more

Mysore style gets a revival

first_imgA traditional art form that once graced the temples and palaces of the centuries-old Wodeyar empire, the intricate Mysore style of painting, which is found to be on the decline has found an active advocate in artist Shobabna Udayasankar.Shobabana, a recipient of the Karnataka Lalitkala Akademi Millenium award is showcasing ‘Royal Art’ a collection of paintings with focus on the lesser-known traditional Mysore school of art, a stream that has till recently remained in the shadow of its more common sister art form, the Tanjore art. Also Read – ‘Playing Jojo was emotionally exhausting’‘Our main purpose is to popularise this art form. We want people to know and remember this art form. We do not want profits. We just want people to know about the richness of this form,’ says Krishna Udayasankar, daughter of Shobabana Udayasankar.An expert especially in the extremely minute and intricate ‘gesso’ work that is used to create an embossed effect on the paintings, Shobana says her mission is to revive interest in the Mysore style by making it accessible and relevant to contemporary audience. Also Read – Leslie doing new comedy special with NetflixOver the past 20 years the artist has been receiving training under the master artist Dundaraja as well as advanced training under the renowned Mysore royal palace artist and curator, the 90-year-old Ramanarasaiah.Talking about the speciality of Mysore paintings, Krishna says, ‘Mysore paintings are done with gold foil. It is very intricate and detailed. It preserves a plethora of knowledge and has many things to convey to the audience.’ The collection of paintings presented in The Royal Art mostly comprise representations of events occurring in spiritual and mythological texts. ‘Mythology is the mainstay of Mysore paintings. I think subject and art form should complement each other.Mythological characters can be brilliantly depicted through Mysore paintings. But I am willing to push the boundaries by representing mythology in innovative and expansive ways. We have paintings where Rama and Sita are depicted in Thai style,’ says Krishna.Shobabana incorporates non-traditional representations of from scripture and mythology in novel viewpoints such as Balinese and Thai culture.The exhibition, says Krishna,has also been well-received by the audience.‘People are very eager to know about the art form. They want to know what Mysore painting is all about. We have visitors who spend 2-3 hours who are really interested to know about the background of each painting. I think people do take a lot of interest in knowing about Mysore art form and it is also very important to tell them the deeper meaning embedded in every painting,’ says Krishna.Mysore paintings of the 19th century were generally done on paperboard or cloth using both mineral and vegetable pigments.Shobabana has based her art on tales and events occurring in various scriptural and mythological texts, including the Puranas.While the ‘Samudra Manthana’ (Churning of the Ocean) is a metaphorical depiction of the creation of the manifested world that features over fifty individual figures, ‘The Wedding of Girija (Parvathi) and Shiva’ and ‘Kama-Kameswari’ are examples of deeper philosophical ruminations on the structure of the cosmos that have been presented and preserved for generations as art.The paintings are priced between Rs 5000 to Rs 3 lakh and enthused by the reception to her exhibition, the artist says she plans to hold another exhibition of Mysore paintings again in Delhi next year.Meanwhile, the current display that began 22 May is scheduled to continue till the end of the month.last_img read more

That lost magic

first_imgHearing stories of kings and queens, princes and princesses, talking animals and trees, or even walking mountains seem real. While world over children grow up on similar tales of wonder, in India it is particularly so because this is the land of magic.For years, even when the nation was on a path to becoming a global superpower, foreigners believed India to be a land of snake charmers and mystics who could turn ropes into snakes or climb a rope, enchanting people standing by the road side. Magic has a long tradition in India, be it with the abounding stories of how Bhanumati could enchant thousands of people at the same time to tales of how P C Sorcar Senior could hypnotize an auditorium full of people into believing he has arrived on time even after being late by hours or the more glitzy show put up by K Lal, whose funeral procession at Ahmedabad, recently drew thousands. Also Read – A vintage affair with Shyam SundarAll, however, might not be magical with the world of Indian magic. Even as Indian magicians are trying to revive their ancient art, they are almost a lost breed. While the Sorcar family, the Lals and few others have kept the tradition alive, the magic of masala movies and glamourous sporting events have taken away much of the edge from the magicians and the illusionists, who were once superstars, performing to packed halls. Amidst a crowd of ultra glitzy cricket shows, uber-glamorous football matches and release of ‘hundred-crore club’ films what went completely unnoticed is the achievement of an Indian magician. Samraj, a 58-year-old civil engineer-turned-magician from Kerala, won the prestigious Merlin Award. It was handed over to him by the president of the International Society of Magicians, Tony Hassini, personally at Hyderabad, in July. Also Read – Melodious Mavericks – Jatin LalitConsidered the Oscar Award of the magic world and given away by the Las Vegas-based Society, the award is the highest achievement for any magician around the globe. The jury evaluated Samraj’s magic events like ‘Tragic end of Titanic’, ‘The graveyard escape’ and ‘The great Indian rope trick.’ While previous recipients include K. Lal and Sorcar Junior among others, it’s a rare triumph for a magician and is taken as a serious step forward by peers. Yet, India seemed totally oblivious to it. Indian magicians have been performing this art for ages by heart and not only for income. But it is very sorry to say that the present condition of Indian magic is not so pleasant. Indian magic goes very slow. New types of presentation, set-up and items are very rare. It is like old wine in an old bottle. The number of professional magicians is very rare and their monthly income from magic is extrmely meagre.PC Sorcar Jr said that he is willing to help any government or private establishment in promoting magic in India. ‘I am also planning to set up a magic institute, which I am hopeful that people will come to in large numbers for greater participation to save this industry from dying,’ Sorcar says. Others feel that there are five reasons for the present condition of Indian magicians. These include lack of innovation in magic props, presentation and proper set-up for magic. Besides, poor monetary condition of Indian magicians, less interest to invest in publicity and no media support is killing the once acclaimed industry. Also, the ticket rates of shows in India are not sufficient to make a magician fully professional in this field, and the number of magic shows is anyway very less. These issues have become the stumbling block in the way of success.Ramesh Lal, a local magician in West Bengal feels that numbers of popular and public known magicians are very less in India and there should be a unified platform for the magician to pitch for their demands from the union government in reviving the dying industry.‘Like other professions, there should be a competition and school children should be involved more in making this profession towards a next goal. Most of us have performed shows in our own respective states and have thus failed to rouse universal appeal. It is time for all of us to stand together to take our demands or suggestions before the government in promoting magic as a profession like other ones,’ he adds. There are reports that the new NDA government is planning to induct magicians, circus artistes and other similar such performers under the centre’s grants and schemes, which will give them a relief in their old age. Though the discussion is in a very preliminary stage, but many feel that the initiatives will bring a sigh of relief for thousands of such artistes in India who even find it difficult to earn a meal a day.last_img read more

First trial run held for IndoBangla container train service

first_imgKolkata: The first trial run of the container train between India and Bangladesh was held in Kolkata on Tuesday morning.Manasi Banerjee, one of the senior-most employees of CONCOR, flagged off the train in presence of Harindra Rao, General Manager, Eastern Railway and Kalyan Rama, CMD, CONCOR (Container Corporation of India Limited). Suchitto Kumar Das, Additional General Manager, Eastern Railway and Basudev Panda, Divisional Railway Manager, Sealdah, were also present. Also Read – Heavy rain hits traffic, flightsSpeaking on the occasion, Rao said that the passenger and goods train services are being regularly run between the two countries. This is for the first time that a container train from India will run between India and Bangladesh. The need for container service between these two countries has been felt by the exporters, as it has certain benefits like substantial time saving, safe transit, cost effectiveness and single window solution. It will also make trade safer and significantly organised in comparison to capacity constraints of the sea and land routes. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedHe further said that this container service will have a wider impact on bilateral trade and will lead to further boost in the peace and harmony between the two neighbouring countries.The first container train to Bangladesh, consisting of 30 wagons, carries 60 containers of soyabean extract and will run via Majerhat-Naihati-Ranaghat-Gede in India and Darsana-Ishurdi-Bangabandhu West in Bangladesh. Bangabandhu West in Bangladesh is 117 km from Dhaka but much closer to industrial hubs around Dhaka.last_img read more

Woman who killed husband attempts suicide in lock up

first_imgKolkata: A woman who had killed her husband, a local Trinamool Congress activist of Sonarpur in South 24-Parganas, after conspiring with her boyfriend, attempted suicide inside the police lockup on Sunday morning.Victim’s wife Madhumita Mistri had been under police custody since she was arrested by the police on April 19. She has been kept under observation.According to police, she attempted suicide by cutting her hand and throat with a blade. A question has, however, been raised on how she got a blade inside the police lockup. Some of the policemen posted outside the lockup found the injured victim with her hand and throat bleeding profusely. She was immediately treated by doctors. The woman conspired with a person with whom she had an extra marital affair and killed her husband. The incident took place on April 9. The matter came to light after the woman’s boy friend admitted his guilt before the investigators after his arrest. Both the accused have been arrested on April 19. The victim, Samir Mistri, a local Trinamool Congress was shot dead by the accused Chandan Mondal. According to the investigation, police came to know that victim’s wife Madhumita had developed an illicit relationship with Mondal around two-and-a-half year ago. Also Read – Heavy rain hits traffic, flightsBoth the woman and her boy friend admitted their relationship before the police and the hatched plan to kill Mistri. The incident took place when the victim was having his dinner inside his house. The front door of their room was kept open by the woman to help her boyfriend to carry out the crime. According to the investigation, police said that there was a quarrel between the couple after the victim came to know about the relationship. The accused might have committed the crime as the victim had opposed their relation.last_img read more

Horticulture dept to kick off Bengal Mango Utsav today

first_imgKolkata: In a bid to showcase and sell the wide varieties of mango and various products prepared from them, the state Food Processing & Horticulture department is organising the three-day Bengal Mango Utsav at New Town Mela Grounds from Friday to Sunday.”Bengal, which is known for its wide variety of fruits and vegetables, produces around 400 varieties of mango and is one of the leading states in the production of table variety mangoes in the country, amounting to seven lakh metric tonnes. The three-day fair will also explore the possibilities of export to Middle East, Europe and South Asian Countries,” a senior official of the state Horticulture department said. Also Read – Heavy rain hits traffic, flightsImporters from Middle East countries like Dubai, Kuwait and Oman are scheduled to turn up at the three-day event, examine the quality of mangoes and hold discussions about export.Apart from Himsagar, Langra and Lakshmanbhog variety of Malda, the department’s major thrust will be Amrapali, Mallika and Alphonso variety of Bankura, which has been receiving positive response from buyers and exporters alike.”We are also gearing up for the Mango Festival at Janpath in Delhi, that will be held from June 14 to 30. Mangoes from Malda and Bankura have been selected for the festival there,” the official added. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedIn the last few years, Bankura has made it to the map of producing quality and exportable variety of mangoes, alongside Malda.”We will be carrying two varieties – Mallika and Amrapali, to Delhi. 17 tonnes of mangoes from Bankura will be taken in a special trans-cooling van, provided by the state Horticulture department. The Amrapali variety is purely organic and had won the first prize in Delhi last year,” said Subhasis Batabyal, vice-chairman of West Bengal Agro Industries Corporation (WBAIC).Last year, 5 tonnes of mango was carried to the capital but later, in response to the huge demand, another 4tonnes of mango had to be dispatched.This year, under the jurisdictional area of the state, mangoes have grown on 4,000 hectares of land in Bankura, with 10 tonnes on average in each hectare.”Orders for export have already come from Middle East countries like Qatar and Dubai,” an official of WBAIC said.last_img read more

Lanka promises to meet deadline for probe into war crimes

first_imgSri Lanka’s new government on Thursday said a domestic mechanism will be in place by September to probe into the alleged human rights violations during the final stages of decades-long war with the LTTE.Foreign minister Mangala Samaraweera said that the domestic mechanism with foreign technical expertise to probe into the allegations of war crimes will be in place when next UN Human Rights Council session will meet in Geneva in September.“All I can say is that we will have a domestic mechanism in place in time when the 30th session of UNHRC commences in September,” Samaraweera told media here. Also Read – Pro-Govt supporters rally as Hong Kong’s divisions deepen“We promised the people a domestic mechanism to look into human rights violations. There is a timeline for its setting up. We do have a timeline, we are working according to a timetable even now. I think we will be able to meet the timeline,” he said.The announcement comes days after US Secretary of State John Kerry during a visit to the island warned Sri Lanka that “true reconciliation” with Tamils will take time, even as he praised the “openness” of the new government in efforts to boost democracy, human rights and reaching out to the minority community. Also Read – Pak Army ‘fully prepared’ to face any challenge: Army spokesmanKerry had praised President Maithripala Sirisena’s new government for reaching out to the Tamil minority after the end of the nearly three-decade of ethnic conflict that claimed more than 100,000 lives.The Sirisena government, which unseated long-time strongman Mahinda Rajapaksa in the January polls, pledged a credible domestic mechanism rather than the UN rights body dictated international mechanism to investigate alleged war crimes committed by both government troops and the LTTE during the military conflict in 2009. The new government is of the view that since Sri Lanka is not a signatory to the Rome statute on international jurisdiction to war crimes, the island would execute justice through its national independent judicial mechanism.The former Rajapaksa regime was subjected to three successive UNHRC resolutions which called for an international investigation.Rajapaksa drew international condemnation over his refusal to investigate alleged military abuses.last_img read more

Behala Puja committes worried over footfall after bridge collapse

first_imgKolkata: Big time Durga puja committees of Behala area, directly connected with the rest of the city through the Majerhat bridge that collapsed early this week, are worried over the footfall in their pandals during the puja days. A spokesman of the ‘Forum for Durgotsav’, a platform of 350 Durga puja committees of the city, told PTI that they hoped the Durga Puja turn out in Behala would remain the same like last year. There are over 30 Puja committees in Behala who are our members. And we can only hope that things will be sorted out in a month’s time. Also Read – Rain batters Kolkata, cripples normal life “This can be done by either constructing two temporary Bailey bridges along the two flanks of the Majerhat bridge or making traffic diversion to other routes,” the ‘Forum for Durgotsav’ president Partha Ghosh said. The Forum is yet to formally approach the government on the issue, he said adding “but our members are in touch.” The ‘SB Park’ puja committee in Thakurpukur area of Behala, a popular destination of revellers, had started preparations months ago, puja committee official Amit Ghosh said. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killed He said “we are concerned that many visitors from north and central parts of the metropolis will not be able to come after the bridge collapse. We are looking for a solution.” A member of ‘Barisha Yubak Brinda’ said, “If there is less crowd from other parts of the city and elsewhere, our preparations will have little use. We, the smaller pujas, mostly depend on the participation of revellers to make it a success and lesser footfall means a cut in sponsorship next year.” He, however, hoped that the revellers from South 24 Parganas district will make up any dip in turn out from northern part of the city and adjoining North 24 pargans district. A puja committee member of ‘Behala Notun Dal’ said while this year’s sponsorship had come to them long ago and there was not much to worry on financial side, they also hoped the crowd would not dwindle “as without revellers the celebrations will lose its lustre.” The spokesman of the ‘Debdaru Fatak puja committe’ wondered if the main link with northern part remained blocked, then how many would take other routes for pandal hopping in Behala. However, a member of ‘Behala Naskar Pukur Lane’ Puja committee said as puja revellers had ignored the potholed roads due to Joka-BBD Bagh metro work in the past few years to throng puja pandals in Behala, “they will find a way out in this year also.”last_img read more

Activity trackers may overestimate sleep time

first_imgWearable activity trackers that promise to monitor physical activity, sleep and other behaviours may be good at counting steps but bad at measuring sleep, says a new study. “Wearable devices that track physical activity, sleep and other behaviours are growing significantly in popularity,” said study co-author Robert Furberg from RTI International, a nonprofit organisation based in North Carolina, US.The researchers conducted a systematic review of 22 published articles researching the ability of Fitbit and Jawbone — two popular activity trackers — to measure steps, distance, physical activity, calories and sleep.  Also Read – ‘Playing Jojo was emotionally exhausting’Several studies indicated that the step counting feature was accurate both in the lab and in the field. Using several different comparison measures, other researchers found that both tracker brands underestimated calories used, and overestimated total sleep time.Overall, the new study indicated higher validity of step counting, and lower validity for calories (energy expenditure) and sleep. Enter personal details like height and weight correctly at initial set-up, and update if there is significant change in weight, the researchers said.“When researching information on the trackers, we learned several tips users may be able to implement to make their tracker more accurate,” study lead author Kelly Evenson, professor at University of North Carolina Gillings School of Global Public Health in the US, pointed out.The findings appeared in the International Journal of Behavioral Nutrition and Physical Activity.last_img read more