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Taking entanglement beyond one ebit

first_img A sound idea: A step towards quantum computing His two collaborators are J.J. García-Ripoll and J.I. Cirac at the Max Planck Institute in Garching, Germany. They propose a way in which to take entanglement beyond its current limit of one ebit. Their Suggestion is titled “How Much Entanglement Can Be Generated between Two Atoms by Detecting Photons?” and appears in Physical Review Letters.Entangled atoms are important to quantum information processing, and many groups are working to create models of quantum computers and efficient methods of entanglement. Different schemes for quantum information processors and quantum networks are appearing all over the world. The idea is to find the best way of transmitting quantum information over distances from one place to another. “Keeping coherence when the atoms get entangled” is of the utmost importance Lamata points out.However, even though photons are considered ideal for this job, they are not particularly good for storing information. Atoms, on the other hand, can preserve quantum information in storage for much longer times. Lamata and his colleagues believe that photonic channels connecting a network of atomic (or even solid-state) devices will be the best way to achieve a quantum network. And this means a better method of entanglement is needed. A method that better preserves quantum information.Lamata and his colleagues focus on the entanglement between two atoms for their theory. Most experimental entanglements are based on entangling atoms separated by distance are based on one of two methods: photon emissions from one atom interacting with the second atom, and measuring the state of the photons emitted by both atoms. However, Lamata explains, most of these experiments deal with “entangling the polarization of the photon with the internal state of the atom. This is finite, so one cannot obtain more than one entanglement bit or ebit. This is inefficient.”Lamata and his coauthors suggest a new way to entangle these atoms. Their proposal considers more than just the internal state of the atoms. “We thought that by considering various things, like momentum, it would be possible to do more entanglement.” And this would expand the entanglement beyond the current excepted maximum of one ebit. “This is a bipartite system, and similar to the method of using photons emitted by both atoms. But we consider other possibilities that have not been seriously considered yet.” According to Lamata, this suggestion is not something that has to be put off until the future brings with it different technology. “We are not experimentalists,” he explains, “but we already have feedback from experimental groups that say they are interested in doing this.” The suggestion posed by Lamata and his colleagues might offer the possibility of making quantum information processing progress in the near future. Lamata insists: “This is something that can provide more efficient entanglement. With this proposal, we thing that it is attainable today.”By Miranda Marquit, Copyright 2007 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. Explore further 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.center_img “Entanglement is a main part of quantum mechanics, and it is important to obtain a high degree of it in physical systems,” Lucas Lamata tells PhysOrg.com. Lucas Lamata is a scientist with the Institute for Fundamental Mathematics and Physics, CSIC, in Madrid, Spain. Citation: Taking entanglement beyond one ebit (2007, January 23) retrieved 18 August 2019 from https://phys.org/news/2007-01-entanglement-ebit.htmllast_img read more

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Intel workers have Android Jelly Bean on Atom phones

first_img Medfield refers to Intel’s low-power Atom chips. The Medfield processors presently used in smartphones are single-core Atom chips. There are plans for a dual-core Medfield chip later this year. This week, though, the buzz about Intel’s vision for smartphones centers on comments made at the Intel Developer Forum. Intel has completed an Android 4.1 (Jelly Bean) port for its Atom smartphone. Intel is porting the Android 4.1 operating system to work on smartphones and tablets using its low-power Atom processors, known as Medfield. The fate of this Jelly Bean and Medfield courtship now rests with carriers, though, and not with Intel. Carriers and phone vendors will be the ones to sound their trumpets about Android 4.1 testing and deployment. Intel said that to date the Medfield-Android 4.1 build is complete and running on Intel workers’ devices–the employees, in codename terms, are using Medfield smartphones with Jelly Bean. The carriers will now take the phones and put them through “acceptance” testing.The smartphones that are based on a single-core Atom chip are being introduced to consumers through such names as Orange, ZTE, Lava International, and Lenovo. Motorola is expected to announce a smartphone based on Intel chips next week. Analysts have assessed the Motorola alliance as an important one for Intel’s smartphone prospects. The Google Motorola smartphone alliance represents promising returns for Intel. By backing and contributing to Android, observers say that Intel can leverage the popularity of this operating system in order to get handset manufacturers and carriers solidly on board with the Atom platform. According to reports, Google’s Motorola has sent invites for an event to be held by Motorola and Intel on September 18. The event is the unveiling of a smartphone. Late last month, Google’s Motorola unit confirmed plans to release its first smartphone powered by an Intel chip in London on that day. Earlier this year, Motorola signed a multi-year, multi-device partnership with Intel to produce Android-powered smartphones and tablets built with Intel processors. 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. Citation: Intel workers have Android Jelly Bean on Atom phones (2012, September 14) retrieved 18 August 2019 from https://phys.org/news/2012-09-intel-workers-android-jelly-bean.html © 2012 Phys.org (Phys.org)—Intel watchers by now understand the quick version of Intel’s to-do list: Join and grow up in smartphone market universe, fire up Ultrabooks and, by both means, show better profit outlook. Intel needs to become a more credible brand behind smartphones as well as PCs, and a lot of the creds will now depend on Medfield, the SoC behind its foray into the smartphone market against rival ARM. Explore further Motorola pledges to use Intel chips in smartphoneslast_img read more

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Astrophysicist suggests planetary misalignment due to multiple star impact

first_img 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. Journal information: Nature Flipping hot Jupiters: Why some planets orbit the wrong way Explore further (Phys.org)—Astrophysicist Konstantin Batygin has published a paper in the journal Nature arguing that the reason some planets lie in a tilt off the equatorial plane of their sun is because of the prior existence of another star that impacted their orbit. He suggests that systems that once hosted more than one star, but now do not, could also explain the existence of “Hot Jupiters” that have an orbit opposite of their host star. Geometrical set-up of the problem. This figure depicts a schematic representation of the production of misaligned close-in planets through disk-driven migration in binary systems. Credit: (c) Nature, 491, 418–420 (15 November 2012) doi:10.1038/nature11560center_img “Hot Jupiters” are large, Jupiter-like planets that orbit very closely to their star. First discovered in 1995, it was assumed they formed at some distance from their host star and then migrated closer over time due to gravitational pull from gasses and dust around the star. Such a theory would suggest that the planet would naturally orbit in alignment with the star’s equator. That theory was dashed however, when in 2008, researchers discovered that some Hot Jupiters did not have aligned orbits and that some in fact actually orbited in reverse of their sun. New theories have suggested this was due to the pull of other planets as the Hot Jupiter made its way closer to the star. Now, Batygin proposes another possibility – that the misalignment is due to the gravitational effects of another star that used to be part of the system, but has since departed.Batygin notes that most solar systems today are binaries, and that some systems have more than two stars. To try to understand what sort of impact multiple stars might have on planets in those systems, he built and ran computer models. His simulations showed that disruptions to a planet’s orbital path could very easily explain why some systems show a total misalignment of all its planets and that given the right circumstances, a complete flip-flop could occur, resulting in a planet orbiting in an opposite direction to their stars’ spin. He adds that because the solar system in which Earth resides has a 7 degree tilt, it’s very likely that one of the stars out there in the Milky Way today, once was part of our own solar system. He also suggests that it might be possible to strengthen his theory by comparing all of the known binary star formations with all known misaligned exoplanet systems. Citation: Astrophysicist suggests planetary misalignment due to multiple star impact (2012, November 15) retrieved 18 August 2019 from https://phys.org/news/2012-11-astrophysicist-planetary-misalignment-due-multiple.html © 2012 Phys.org More information: A primordial origin for misalignments between stellar spin axes and planetary orbits, Nature, 491, 418–420 (15 November 2012) doi:10.1038/nature11560AbstractThe existence of gaseous giant planets whose orbits lie close to their host stars (‘hot Jupiters’) can largely be accounted for by planetary migration associated with viscous evolution of proto-planetary nebulae. Recently, observations of the Rossiter–McLaughlin effect during planetary transits have revealed that a considerable fraction of hot Jupiters are on orbits that are misaligned with respect to the spin axes of their host stars3. This observation has cast doubt on the importance of disk-driven migration as a mechanism for producing hot Jupiters. Here I show that misaligned orbits can be a natural consequence of disk migration in binary systems whose orbital plane is uncorrelated with the spin axes of the individual stars. The gravitational torques arising from the dynamical evolution of idealized proto-planetary disks under perturbations from massive distant bodies act to misalign the orbital planes of the disks relative to the spin poles of their host stars. As a result, I suggest that in the absence of strong coupling between the angular momentum of the disk and that of the host star, or of sufficient dissipation that acts to realign the stellar spin axis and the planetary orbits, the fraction of planetary systems (including systems of ‘hot Neptunes’ and ‘super-Earths’) whose angular momentum vectors are misaligned with respect to their host stars will be commensurate with the rate of primordial stellar multiplicity.last_img read more

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Google eyes nanoparticle platform as part of health rethink

first_imgIn November, Conrad also talked about Google’s health explorations at the WSJD Live conference. As a complex system, a reactive, episodic paradigm for a health system makes little sense, said Conrad. “Can you imagine,” said Conrad, “changing the oil in your car when the engine is broken?” Yet that is what we do in health care. We wait and go to the mechanic when we are broken. He talked about the use of magnetic nanoparticles to monitor for signs of cancer and other diseases. He said the goal was to functionalize these nanoparticles, the nexus between biology and engineering, to make them behave the way they wanted. The idea, he said, was to swallow a pill and one could call them somewhere, trap them and then can ask them what they saw. “Over the last three years, Google has quietly built a cutting-edge health care facility,” said the magazine video. Google’s facility employs over 100 doctors and scientists. James Hamblin, senior editor at The Atlantic, sat in Mountain View, California, and spoke with Andrew Conrad, head of Google Life Sciences. Conrad told him that the group is trying to change medicine from being episodic and reactive (like going to the doctor because your arm hurts) to proactive. Google is working on a wristband that can detect cancer cells when they first appear. That would be possible in a system where they would be designing tiny magnetic particles to patrol the human body for signs of cancer and other diseases. “So imagine that you swallow a pill [You would take a pill maybe twice a month] and that pill has small things called nanoparticles in it, decorated on their surface with markers that attach to cancer cells, We have them circulate through your whole body, and we collect them in the vasculature of the arm with a magnet, and you ask them what they saw.”In brief, Google is designing a system where tiny magnetic particles patrol the human body for signs of cancer and other diseases. UPI’s Brooks Hays said that “the pill would release nanoparticles into a patient’s bloodstream; the magnetized particles would tour the body seeking out cancer cells to bind to. A wearable monitor would attract and count the particles, pulling information as to what the particles had detected.” Cancer cells, for example, would light up. How does light pass through skin? To understand that, Google started to make synthetic skin. For their arm model, they had to use materials that behave like skin with biocomponents of real arms. Also, Google is monitoring 175 healthy volunteers, collecting physiological data frequently,. The goal is to understand what defines a “healthy” person, to know what ‘normal’ is. They need to understand the baseline. In the video, Conrad, had a memorable reply when his interviewer asked if some people would feel weird having nanoparticles floating through their body as trackers. “It’s way weirder,” said Conrad, “to have cancer cells floating through your body that are constantly trying to kill you.” Google likes taking on big problems and that’s no secret. Transportation. Communication, and now Health. The Atlantic has posted a video and it is all about Google’s attempt to redefine how we manage our health. “Imagine you want to explore Parisian culture and you do it by flying a helicopter over Paris once a year. That’s what doctors do now. What we’re hoping to do is that these little particles go out, mingle with the people, we call them back to one place, and we ask them, hey what did you see?” Did you find cancer? … Too much sodium?” © 2015 Tech Xplore Google seeks way to search bodies for disease 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. Citation: Google eyes nanoparticle platform as part of health rethink (2015, January 31) retrieved 18 August 2019 from https://phys.org/news/2015-01-google-eyes-nanoparticle-platform-health.html Explore furtherlast_img read more

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Some food for thought on RDay

first_img‘Are we really free to express our views in this independent nation? The question has bogged me down on various occasions like it has bogged others,’ says Atul Satya Koushik, president, Film and Theatre Society.With Republic Day just two days away, the society is reconsidering the perception of freedom, democracy and republic through two of its classic plays — Animal Farm and Wo Lahore.‘The event, titled 1940s, is a series of plays set in the pre-Independence era. They question the conventional perceptions of freedom, republic and democracy and try to present that face and form of these ideologies which they have attained against the initial aspirations,’ explains Atul. Also Read – ‘Playing Jojo was emotionally exhausting’‘Today the Republic of India still remains a work in progress and the gap between the haves and the have nots is widening with each passing day. Both my plays show the flip side of the sad state by questioning our responsiblities as citizens of India,’ he adds.Animal Farm is an adaptation of George Orwell’s classic novel of the same name. The 110 minute Hindi play shows a hypothetical village miles away from India where Britishers have gained control over some farms. It uses rural languages, folk songs and incorporates various comic situations. Also Read – Leslie doing new comedy special with Netflix‘It represents how the political leaders gained power after freedom and eventually India remained a slave forever. The play tries to bring the concept of Animal Farm to Indian struggles for freedom and the developments after that,’ says Atul.It’s a musical satire about how and why India as a country has not been able to progress due to certain miscreants involved in power making, adds the director.Wo Lahore, on the other hand, is a play based on a short story written by Atul himself. It is the story of an ordinary woman, Jamuna, a mother of three sons who tries to keep her family intact in spite of everything that is happening around. The play has been set in the mid 20th century India which is the most talked about period in its history. ‘Wo Lahore is based on internal conflicts and turmoil prevailing in an ordinary Indian family with the struggle for freedom, social beliefs of those times with the Partition serving as the backdrop. It’s a story of a family in Lahore in the backdrop of the freedom struggle and Partition. What happened during the time of Partition is both traumatic and heartbreaking,’ says Atul.Go check out the plays as the word ‘republic’ gets reinvented.DETAILAt: Open Air Theatre, Pearey Lal Bhawan, BSZ Marg, near ITO When: 26-27 January Timings: 7 pm onwards Cost: Rs 300last_img read more

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Its all Greek to me

first_img26 July, witnessed a formal opening of the exhibition and the works are on display till 1 August. Sketbe (Association of Visual Artists of Northern Greece) was founded on in 1983, set up by a group of well known artists from Thessaloniki. One of the objects of the association is to collaborate with sister agencies in Greece and all over the world. There are more than 280 members of the association including: academics, members of International Art Associations, art school graduates and many distinguished artists from Thessaloniki and Northern Greece. Also Read – ‘Playing Jojo was emotionally exhausting’The participating artistes are – Yiannis Adamantidis, Sofia Amperidou, Ioanna Assani, Kiriaki Charalambidou, Konstantinos Balian, Konstantina Dellatola, Lorraine Dietrich, Elena Dimiropoulou, Fotini Hamidieli, Maria Kompatsiari, Periklis Kostopoulos,Voula Lazaridou, Ioulia Manousi, Yiannis Monogyios, Chryssoula Papadaki, George Politis, Stelios Stavrou and Frosso Vizovitou. George Politis prefers water media for their transparent and luminous results. Also Read – Leslie doing new comedy special with NetflixCurrently  president of the Artists Society of Northern Greece (SKETBE), he is signature member of the American Watercolor Society (AWS), Royal Institute of Painters in Watercolours (RI). His paintings won many awards. He had solo exhibitions in Greece, France, England. He has served as juror in two IWS exhibitions and the Biennial of Watercolour in Estaimpuis, Belgium. His work has been featured in art books and magazines worldwide (L’Aquarelliste, International Artist, The Artist, UK, L’Art de I’ Aquarelle and several other magazines). In his current art works time plays a very basic role; particularly the way it leaves its mark on varied objects and on nature itself fascinates me. He has this vivid vision to see in the old, rusty and ravaged both truth and excitement. He finds inspiration in ordinary and commonly overlooked items, responding to them with dramatically different feeling each time, whether emphasising the serenity, the loneliness, the atmosphere, the melancholy. Then there is an artist with a difference, a self taught painter Frosso Vizovitou, she works with mixed media and mainly in acrylics. In 1999 she takes classes in Praxis Fine Arts School in Thessaloniki. Her main theme was ‘The Acrobat’ by Zene and also the world of circus. Nowadays she is occupied with all major contemporary topics reflected in her work. She has done many solo and group shows and  has been an active member of SKETBE (Artists Society of Northern Greece) and ELINEPA (Greek – Indian Association).Ioannis Monogyios, who has also been a promising participant of Sketbe since 1994 had professionally worked in the fields of ceramics and visual-art constructions. Using the relevant advices of etcher Ruud Matthes and Valuable assistance of engraving teacher Dimitris Karlaftopoulos, he explored the art of printmaking. He studied for three years in the Helios engraving art workshops, in Thessaloniki. He is member of the board of the Artists Society of Northern Greece (SKETBE) and vice president of Greek Printmakers Association. He has participated in many group exhibitions in Greece and abroad and had four solo exhibitions.WHERE: Lalit Kala Akademi WHEN: On till 1 August, 11:00 am  to 7:00 pm (Monday- Saturday)last_img read more

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Mamata concerned over rise in petrol diesel prices

first_imgKolkata: West Bengal Chief Minister Mamata Banerjee today expressed deep concern over the sharp rise in petrol and diesel prices, saying it will affect common people. “We are very concerned about the rising prices of petrol and diesel. This will certainly affect prices all around. Common people, farmers and many will suffer,” Banerjee said on her official Twitter handle.Petrol price today increased by 33 paisa a litre in Delhi — the highest since the daily price revision came into force in mid-June 2017, and diesel by 26 paisa, according to price notification issued by state-owned oil firms.Petrol costs Rs 78.91 per litre and diesel Rs 70.12 in Kolkata, the notification said.Rates vary from state to state depending on the incidence of local sales tax or VAT. Prices in Delhi are the cheapest among all metros and most state capitals.last_img read more

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Centre releases list of 98 cities for Smart City project

first_imgThe names of the cities selected for the Rs 48,000 crore Smart Cities project was released by the Centre pending a nomination each from Uttar Pradesh and Jammu and Kashmir.Earlier, Prime Minister Narendra Modi has launched the ambitious project with the announcement of criteria and guidelines for 100 Smart Cities to be selected through city challenge competition in June 25.While Jammu and Kashmir has to nominate one city, UP has got slots for 13 cities to be proposed as Smart City based on the urban population and number of notified cities. Also Read – Need to understand why law graduate’s natural choice is not legal profession: CJI”The Government of Jammu and Kashmir sought more time to firm up their choice. More information is sought from the Uttar Pradesh government about the 13th smart city that is yet to be announced,” Urban Development Minister M Venkaiah Naidu said here after releasing the list here.According to UD Ministry sources, Jammu and Kashmir wants both Jammu and Srinagar to be developed as Smart City though the state has got only one slot in the project. Also Read – Health remains key challenge in India’s development: KovindBoth Meerut and Rae Bareli has got equal points for the 13th slot in the city challenge competition in UP so now the state has to decide whom it wants to nominate, sources added.Asked when the names of the remaining two cities will be decided, Naidu said it will be decided in due course.Lucknow, Varanasi, Agra, Bareilly, Aligarh, Jhansi, Sharanpur are among 12 cities selected in UP for the Smart City project.However, Patna and Bengaluru and Mumbai are not in the list. “It is the states which has sent the names of the cities to be included in the project. Names of Patna and Bangalore were not proposed by their respective states. As far as Mumbai is concerned, Maharashtra has proposed Navi (RPT) Navi Mumbai for that purpose,” Naidu said.While UP has maximum of 13 cities, followed by 12 by Tamil Nadu and 10 by Maharashtra to be developed as Smart Cities, Madhya Pradesh has seven cities in the project.Karnataka and Gujarat have six cities each while Bihar and Andhra has three each and rest of the states have two and one cities respectively in the project.All Union Territories, including Delhi, have found place in the list.Moradabad, Solapur, Amritsar, Rourkela, Durgapur and Ajmer also figure in the list of 98 cities.The next stage is the choosing 20 cities in the first lot by end of the year and the next two years 40 cities each will be selected for receiving Central funding of Rs 500 crore spread over the coming five years.Naidu said, “The first stage of the competition was entirely conducted by the States and UTs only with little role for the Union Urban Development Ministry.”Centre will release Rs 2 crore for each of the 98 cities in the next couple of days for preparation of Smart City plans.For the selection of 20 cities, the broad criteria will be city vision and strategy, cost effectiveness, credibility of implementation and innovation.Naidu said those cities which are not selected in the first round can again participate in the second and third round by improving their performances. Even states can nominate new names after elimination of some cities in the final round of selection, he said.last_img read more

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Four shops gutted in fire in West Bengal

first_imgCanning (WB): At least four shops were gutted after a fire broke out at a cycle repairing shop in South 24 Parganas district on Friday, police said. The incident happened at 10 am at College More market at Canning, the police said, adding, nobody was injured in the incident. Initially the fire spread to a sweetmeat shop from the cycle repairing shop and then it spread to eight other shops, a police officer said, adding, a gas cylinder also exploded at the sweetmeat shop. Irate locals attacked fire fighters alleging that they failed to respond immediately, he said. None of the firefighters were injured in the attack, he added. The fire was brought under control after an hour, the police officer said.last_img read more

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Travel writing may change but will never die

first_imgIts demise was predicted back in the 1930s but it endured, and even in our day, despite the Internet and Google Maps allowing us to access any part of the world virtually on our devices, travel writing will stay as the best window into other cultures, says a panel of travelogue writers.Travel writing “is one of the most ancient forms of literature, predating the novel by thousands of years and a form that has appeared simultaneously and independently throughout the world”, said writer William Dalrymple as he kicked off The Travel Session, featuring legendary travel writer Colin Thubron, Anthony Sattin, and Gerard Russell among others, at the final day of the Jaipur Literature Festival on Monday. Also Read – ‘Playing Jojo was emotionally exhausting’Thubron, who has over half a century experience of travel to exotic and rarely-frequented (then) places across Europe and Asia after chronicling his first journey in Mirror to Damascus (1967) – the one such work on the Syrian capital in over a 100 years, contended that the end of travel writing was predicted in the 1930s, but “it refused to die”. Internet, Google Maps may have allowed people to virtually plot the entire globe and view from the comforts of one’s home, but he maintained that “the feeling of being in the place is different to seeing it on the desktop” and expressed confidence that although different generations might approach travel differently, the impulse for adventure remained the same. Also Read – Leslie doing new comedy special with Netflix“One must dare to do something special, as it always yields into something great,” said Thubron, whose other works include Among the Russians (1983), Behind the Wall: A Journey through China (1987), The Lost Heart of Asia (1994), In Siberia (1999), and To a Mountain in Tibet (2011).British journalist and writer Sattin, who read from his book The Pharaoh’s Shadow: Travels in Ancient and Modern Egypt, a nuanced and evocative journey in time and space through the country’s past to its conflicted present, said his experience showed him that the way ancient Egyptians lived thousands of years ago continues to define existence there even today. Indian journalist Salil Tripathi, who has been to over 50 countries, said he likes looking at places “through their literature or their people or their history”, while American writer and journalist Alex Shoumatoff noted how adventures can be inspired from the strangest of places. In his case, it was a piece about India’s northeastern state Mizoram, “wedged between Myanmar and Bangladesh”, in a Canadian newspaper and he was so interested in it “decided to investigate, and ended up writing an article about the rat infestation in the bamboo plants in the region, and its affect on the locals”. Despite visiting and writing about several unique places in her Small Wars Permitting: Dispatches from Foreign Lands (2008), British journalist and author Christina Lamb, who quipped that she felt she was there on false pretenses since she was at the festival as The Sunday Times foreign correspondent, not as a conventional travel writer. Reading from Farewell Kabul: From Afghanistan to a More Dangerous Place, she mentioned her experience of visiting Guantanamo Bay, which she described as “the strangest place” she had ever been to, where she saw instances of inhumane treatment, but also such a “complex toilet flushing system was so complex that she had to receive a military briefing on it” and how “people seemed more worried about bumping into iguanas than the human rights violations going on”.Russell, a former British diplomat, mentioned some experiences of encountering several unique but obscure and dying religions he had encountered in the Middle East including the Mandeans, Yazidis and Samaritans, which he had described in Heirs to a Forgotten Kingdom, and maintains are the last surviving examples of the curious, hidden links between today’s religions.last_img read more

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