Substitutional reality system plays head games to explore delusions w Video

first_img Explore further 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 Spatial configuration can spark deja vu, psychology study reveals 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. Play Video: Scientific Reports 2, Article number: 459 doi:10.1038/srep00459 The researchers who developed the system along with Suzuki are with the RIKEN Brain Science Institute’s Laboratory for Adaptive Intelligence. They are Sohei Wakisaka and Naotaka Fujii. The Brain Science Institute was established in 1997 as part of RIKEN, which is an independent research institution supported by the Japanese government.Of what use is the SR system and their research? The system is explained as of use to study cognitive dysfunction in psychiatric patients. People without such disorders can distinguish between real and imagined events using unconscious processes, but the processes break down in some psychiatric conditions. Schizophrenics may hear voices and see what is not there; some delusional patients suffer from perpetual false memories.In wearing an “Inception” helmet, reality is manipulated to simulate experiences, and could be used to study cognitive dysfunction in psychiatric disorders.”SR provides a unique opportunity to model these experiences in healthy subjects, which could be useful for investigating the cognitive mechanisms underlying hallucinations and delusions,” said Suzuki. The system may also offer an affordable way for scientists to explore these disorders. Citation: ‘Substitutional reality’ system plays head games to explore delusions (w/ Video) (2012, August 28) retrieved 18 August 2019 from https://phys.org/news/2012-08-substitutional-reality-games-explore-delusions.html (Phys.org)—Take a commercially available panoramic video camera used for recording, add a computer for storing recorded footage, and a head-mounted visual display that can switch seamlessly between the footage and a live feed captured by a camera and attached microphone. The result of all this is what Japanese researchers are using in their explorations of “substitutional reality,” or SR. This is a purposeful new direction from virtual reality. The SR system delivers a “conviction” of being in the real world, which is absent in VR technologies.center_img The researchers discuss their work, tests, and implications in a paper titled “Substitutional Reality System: A Novel Experimental Platform for Experiencing Alternative Reality,” published by Scientific Reports.Keisuke Suzuki, who is at the Sackler Centre for Consciousness Science at the University of Sussex and lead author, said that he and his research team from RIKEN in Japan came up with their SR system in order to explore cognitive mechanisms underlying people’s convictions about reality. How can you trust what you perceive is real? The answer can be in an experimental platform that presents scenes that participants believe are completely real, but are really the result of content that is manipulated. A video shows how the researchers had their helmeted study participant looking at live scenes switched to past recorded scenes, presented alternately. The SR system was essentially manipulating the person’s sense of reality by showing live scenes and recorded scenes (edited in advance) with the goal being to witness if, and to what extent, a participant fails to recognize there is a reality gap. Most of the subjects failed to distinguish between the live and recorded scenes in the experiment. “Seven of 10 participants could not detect that the given scene was recorded…The participant was not certain whether he was experiencing live or recorded scenes.” Journal information: Scientific Reports Substitutional Reality System. In the recording module (left), the panoramic view was recorded in advance by a panoramic camera, and stored in the data storage connected to the control computer. In the experience module (right), either a live scene captured by a head-mounted camera or recorded scenes cropped from a pre-recorded movie were shown on a head-mounted display (HMD). The cropped area presented in the recorded scenes was determined in real-time using head orientation information calculated from the HMD orientation sensor. Scene examples are shown here. In the recorded scene a person with a lab coat waved his hand, who was not present in the live scene. A participant believed the person with the lab coat was physically present there, when the covert switch from the live to the recorded scene was successfully performed. Image (c) Scientific Reports 2, Article number: 459 doi:10.1038/srep00459 More information: Substitutional Reality System: A Novel Experimental Platform for Experiencing Alternative Reality, Scientific Reports 2, Article number: 459 doi:10.1038/srep00459AbstractWe have developed a novel experimental platform, referred to as a substitutional reality (SR) system, for studying the conviction of the perception of live reality and related metacognitive functions. The SR system was designed to manipulate people’s reality by allowing them to experience live scenes (in which they were physically present) and recorded scenes (which were recorded and edited in advance) in an alternating manner without noticing a reality gap. All of the naïve participants (n = 21) successfully believed that they had experienced live scenes when recorded scenes had been presented. Additional psychophysical experiments suggest the depth of visual objects does not affect the perceptual discriminability between scenes, and the scene switch during head movement enhance substitutional performance. The SR system, with its reality manipulation, is a novel and affordable method for studying metacognitive functions and psychiatric disorders. © 2012 Phys.orglast_img read more

Selfrolled tubes make miniature electronics

first_imgOn an RFIC, a typical spiral inductor takes up an area of about 400 x 400 μm2. In the new study, the researchers used their new method to design a spiral inductor with an area of 45 x 16 μm2, which is about 0.45% of the conventional one. Plus, the new inductor has a Q factor (a measure of efficiency) of 21, compared with 6 for conventional inductors (excluding the thick metal type), and is significantly better at confining its magnetic field, resulting in fewer losses.The method the researchers used involves depositing a patterned-metal thin-film layer on a strained silicon nitride nanomembrane. Each metal strip along the rolling direction serves as an inductor cell, and all the cells are connected by metal connection lines. (Phys.org)—With downscaling as one of the main pursuits in electronics research today, scientists and engineers are developing a variety of miniaturization strategies, from those involving powerful microscopes to self-assembly methods. In a new study, a team of engineers has developed a way to miniaturize spiral inductors that are often used in radio frequency integrated circuits (RFICs) by patterning inductor cells onto a flat, strained nanomembrane that rolls itself up into a tube. In the proposed design, miniature inductors could be less than 1% of the size of conventional inductors while offering an improved performance. The engineers, led by Xiuling Li, Associate Professor in the Department of Electrical and Computer Engineering at the University of Illinois in Urbana, Illinois, have published their paper on a design and prototype of self-rolled inductors in a recent issue of Nano Letters.”Self-rolled-up nanotechnology is a platform my research group has been working on for several years,” Li told Phys.org. “We have made significant progress in several aspects of the rolling-up process control and mechanism understanding, and have been looking for killer applications. I think we might have just found one. Preliminary experimental results are consistent with the simulations.”Inductors, which are devices that store energy in their magnetic fields, are commonly used in RFICs. As Li explained, RFICs are used for both wireless and wired communication applications, from portable consumer electronics to battleground surveillance. While other components of RFICs have been steadily shrinking, inductors have not been able to scale down without suffering performance losses.”Shrinking the size without compromising or even enhancing the performance is always desired,” Li said. “Compared to the aggressive scaling of active devices (transistors), inductors have simply not been able to keep up with the pace.” These are experimental images of a self-rolled inductor, printed on a very thin film of silicon nitrate. Credit: Xiuling Li In the future, the researchers plan to build upon the prototype presented here and demonstrate more ideal structures experimentally. They also hope to apply the rolling technique to not just inductors, but also tube-based capacitors, resistors, filters, and transformers. All these components could then be integrated together for a “super miniaturized” RFIC platform. More information: Wen Huang, et al. “On-Chip Inductors with Self-Rolled-Up SiNx Nanomembrane Tubes: A Novel Design Platform for Extreme Miniaturization.” Nano Letters. DOI: 10.1021/nl303395d These are experimental images of a self-rolled inductor, printed on a very thin film of silicon nitrate. Credit: Xiuling LI (a) A pattern of conduction strips on a 2D nanomembrane, with arrows indicating the direction of current flow. (b) A nanomembrane rolls up due to stress release. Image credit: Wen Huang, et al. ©2012 American Chemical Society Copyright 2012 Phys.org All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of Phys.org. Explore further Scientists have designed a 3D inductor that rolls up from a 2D nanomembrane. The inductor offers a better performance and smaller footprint than conventional inductors. Image credit: Wen Huang, et al. ©2012 American Chemical Society TDK intros ultra high-Q multilayer inductors Once these strained nanomembranes are released from their substrates, the energy relaxation of their initial strain causes them to roll spontaneously. Momentum generated by the relaxation causes the planar membrane to scroll up from one or both ends, and then continue to roll into a tube. By carefully designing the amount of stress in the membrane along with other factors, the engineers can control the ultimate rolled-up size of the final tube. One of these rolled-up tubes acts as a spiral inductor, having a miniaturized area as noted above. Multiple inductors can then be transfer-printed and arranged at will on wafers with predesigned RFICs.While there has traditionally been a trade-off between inductor size and performance, Li explained that the researchers could improve both aspects by using a 3D architecture fabricated through 2D processing. “In conventional planar spiral designs, increasing the number of turns increases the inductance; however, more turns in plane means a larger footprint is required, which lead to more parasitic capacitance with the substrate, lowering the self-resonant frequency,” she said. “Therefore, inductors need to go 3D. For the 3D spiral inductor design we proposed, the inductance can be readily increased without causing too much parasitic effect. As a result, the rolled-up 3D design not only reduces the footprint, but is also suitable for higher frequency applications at a much smaller area budget.”Processing difficulties and associated cost are some of the main challenges for past 3D designs. The platform we are proposing uses a unique fabrication method where 3D architectures are fabricated through 2D planar processing. The structure only becomes 3D spontaneously when it is released from its mechanical support. No processing on curved or suspended surfaces is involved.” Journal information: Nano Letters Citation: Self-rolled tubes make miniature electronics (2012, December 12) retrieved 18 August 2019 from https://phys.org/news/2012-12-self-rolled-tubes-miniature-electronics.html 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.last_img read more

Neuron transistor behaves like a brain neuron

first_imgStructure of the neuron transistor, which contains a 2D flake of MoS2. Credit: S. G. Hu et al. ©2017 IOP Publishing (Phys.org)—Researchers have built a new type of “neuron transistor”—a transistor that behaves like a neuron in a living brain. These devices could form the building blocks of neuromorphic hardware that may offer unprecedented computational capabilities, such as learning and adaptation. Explore further Journal information: Nanotechnology More information: S. G. Hu et al. “A MoS2-based coplanar neuron transistor for logic applications.” Nanotechnology. DOI: 10.1088/1361-6528/aa6b47 © 2017 Phys.orgcenter_img The researchers, S. G. Hu and coauthors at the University of Electronic Science and Technology of China and Nanyang Technological University in Singapore, have published a paper on the neuron transistor in a recent issue of Nanotechnology.In order for a transistor to behave like a biological neuron, it must be capable of implementing neuron-like functions—in particular, weighted summation and threshold functions. These refer to a biological neuron’s ability to receive weighted input signals from many other neurons, and then to sum the input values and compare them to a threshold value to determine whether or not to fire. The human brain has tens of billions of neurons, and they are constantly performing weighted summation and threshold functions many times per second that together control all of our thoughts and actions.In the new study, the researchers constructed a neuron transistor that acts like a single neuron, capable of weighted summation and threshold functions. Instead of being made of silicon like conventional transistors, the neuron transistor is made of a two-dimensional flake of molybdenum disulfide (MoS2), which belongs to a new class of semiconductor called transition metal dichalcogenides. To demonstrate the neuron transistor’s neuron-like behavior, the researchers showed that it can be controlled by either one gate or two gates simultaneously. In the latter case, the neuron transistor implements a summation function. To demonstrate, the researchers showed that the neuron transistor can perform a counting task analogous to moving the beads in a two-bead abacus, along with other logic functions.One of the advantages of the neuron transistor is its operating speed. Although other neuron transistors have already been built, they typically operate at frequencies of less than or equal to 0.05 Hz, which is much lower than the average firing rate of biological neurons of about 5 Hz. The new neuron transistor works in a wide frequency range of 0.01 to 15 Hz, which the researchers expect will offer advantages for developing neuromorphic hardware.In the future, the researchers hope to add more control gates to the neuron transistor, creating a more realistic model of a biological neuron with its many inputs. In addition, the researchers hope to integrate neuron transistors with memristors (which are considered to be the most suitable device for implementing synapses) to construct neuromorphic systems that can work in a similar way to the brain. A turbo engine for tracing neurons Citation: Neuron transistor behaves like a brain neuron (2017, June 20) retrieved 18 August 2019 from https://phys.org/news/2017-06-neuron-transistor-brain.html 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.last_img read more

The Bong business

first_imgThe performers for this stand-up comedy show include Abijit Ganguly and Utsav Chakraborty.Ganguly is a Bengali boy, born in Bangalore, raised in Delhi, amidst the deeply-influencing Punjabi culture, dating a Gujarati girl who lives in UP. Basically, he’s Mr. India. Not as in capable of turning invisible or anything…But you know what we mean. He is popularly referred to the best looking Bengali man after Bappi Lahiri. Three years on and he`s been killing it telling his tales of marriageable age, alchoholism, racism, superheroes, beggars, dating a Gujarati girl, weight issues, media…and more. On special request, he does a lot of sex comedy (which is kind of ironical). Also Read – ‘Playing Jojo was emotionally exhausting’Chakraborty is a paradox. He is either the worst thing you`ve ever seen or the awfullest thing you`ve ever seen. There is no middle ground. Does he just do impressions? Is he an observational comedian? Is he a rant comedian? Is he a political comedian? Is he even a comedian? Is he even a person?You think you know who Utsav Chakraborty is? Even Utsav Chakraborty doesn`t know who Utsav Chakraborty is! (Apart from being the person currently responsible for 80 percent of Delhi’s weed consumption, which explains this vague write-up) So there. Who said Bengali’s don’t know how to laugh at themselves? Head over and find out!WHEN: 14 March, 8 pmWHERE: Askhara Theatre, Baba Kharak Singh Marglast_img

A poetic delight

first_imgCentral Park, right at the heart of the Capital, witnessed a poetic Sunday evening. Sanskar Bharti, an organisation that works to promote Indian art and culture, organised the event titled Sharad Kavyostav. The event was graced by the presence – Indresh Kumar, Meenakshi Lekhi , Prabhat Jha, RK Sinha, Padma Bhushan Gopaldas Neeraj  and  many  other distinguished poets. Padm Bhushan  Gopaldas Neeraj touched every segment of society by his doha. Surendra Sharma created a humorous atmosphere with his energetic poems.  Sita Sagar, Rajesh Chetan, Vishnu Saxena, Charanjit Charan and Balkrishna presentations were all based on nationalism.Sanskar Bharati that has been working since 1982 aims to promote India arts and culture across the world. More than 1,500 units of the organization are working across the country.last_img read more

SSKM successfully performs kidney transplants on two male patients

first_imgKolkata: SSKM Hospital has successfully performed kidney transplants on two male patients in the hospital on Wednesday night.According to the hospital sources, two kidneys which were extracted from a female patient declared brain dead by the state health department in a private hospital off EM Bypass, have been transplanted in two patients of SSKM Hospital.The SSKM Hospital authorities have not yet divulged the identity of the patients. They said the two patients who have received the kidneys are 22 and 54 years old respectively. They have been under constant monitoring. The liver of the donor could not be retrieved due to the non-availability of suitable recipients.According to SSKM sources, two corneas which were extracted from the donor have been given to a private eye hospital group. A 63-year-old female patient, Sucheta Sarkar was admitted to a private hospital at Mukundupur on April 1 with a Spontaneous Intracerebral and intraventricular hemorrhage. She was under conservative management and she was showing signs of brainstem death. On April 4, a team of Neurologists, Intensivists and Anaesthetists from the private hospital examined the patient under the supervision of an observer from the Department of Health at Swasthya Bhawan. After a thorough examination, they declared the patient brain-stem dead. After deliberation, the patient’s family members consented to donate her organs for life-saving transplants. The Additional Director of Health Services and Nodal Officer for Organ Transplant Govt of West Bengal coordinated the entire process of declaration of brain death and carried out counselling of relatives of the patient. They also conducted the appropriate procedure needed for donating organs to different recipients as per the waiting lists. The organs were retrieved in the private hospital at around 11 pm on Wednesday and transported to SSKM immediately for transplant.In this particular case, both kidneys were dedicated to IPGMER/SSKM Hospital. The liver could not be retrieved due to non-availability of recipients. The heart was found to be clinically unfit for transplantation.last_img read more

HIDCO to replace bamboo railings with steel ones in New Town

first_imgKolkata: Housing Infrastructure Development Corporation (HIDCO) will replace the bamboo railings in phases to ensure accident free travelling in New Town.The decision was taken following a discussion between the police and HIDCO authorities, where the former requested to replace the bamboo railings with steel ones, as some pedestrians have a tendency to cross streets by breaking the fencing. Such incidents increase the chance of road accidents.Accordingly, HIDCO officials got in touch with the Kolkata Architecture Foundation (KAF) to make the design of the railings, keeping in mind the beauty and aesthetics of New Town. Also Read – Heavy rain hits traffic, flightsA preliminary design made by KAF has been put up at the roundabout of Eco Space/Gitanjali Park of TCS. The design will be further improved and then will be given a coat of paint. The steel railings will be then put up in areas following discussion with the police.It may be mentioned that New Town Kolkata Development Authority (NKDA) has already taken steps to ensure uninterrupted flow of traffic on Biswa Bangla Sarani, by initiating drives against stray cattle. A shelter has been set up where the stray animal will be kept and modalities are being prepared about their maintenance.Also, four underpasses are being constructed at the 3rd rotary, considered to be the busiest crossing in New Town, for smooth flow of traffic and safety of the pedestrians on Biswa Bangla Sarani.last_img read more

Tihar Jail resonates with classical music

first_imgLegends of India in collaboration with Sangeet Natak Akademi presented a rendition by Dr Nagraj Rao Havaldar last weekend. He is one of the most renowned exponents of Hindustani classical music. He sang a range of soulful songs and concluded the melodious evening with a Raag Durga Composition ‘Man Mohan Murli Wala’ and ‘Jo Bhaje Hari Ko Sada.’ As part of the rehabilitation of inmates of Asia’s largest prison complex, a unique initiative by ‘Legends of India,’ the event was based on music when it celebrated its fifth edition at Tihar Jail. The  Also Read – ‘Playing Jojo was emotionally exhausting’performance included bhajan based on ragas.On the occasion he said “An important aspect of music is that it is able to convey emotion and feeling. Music is not grammar. Where speech ends, music begins. Music has tremendous power.” In the audience, many swayed their heads and tapped their feet while some sat still — heads bowed and eyes shut — in deep thought. This performance provided a sense of solace and enabled them to relax and enjoy the music. The instruments play an important role in classical music. In the rendition, flute was played by Ronu Majumdar, sitar and cello by Shubhendra and Saskia Rao.  Also Read – Leslie doing new comedy special with NetflixThe consistent effort is to elevate the minds and soothe the spirits of the inmates, some of whom are hardened criminals, and bringing about their inner transformation. Dipayan Mazumdar, Chairman of Legends of India, on this occasion said that “taking initiatives is not difficult but implementing ideas for taking those initiatives on a high elevation takes a lot of hard work. Also, we would try to arrange music professionals for the ones who are interested in learning music.” Earlier, Legends of India had organised Visual art classes for Tihar inmates where visual artists voluntarily participated to reform through art. The third edition of Visual Arts Classes was held on August 19 led by visual artists Suvidha Mistry and Diti Mistry. These paintings, by some of the inmates, were not only very good but expressed their emotions and ideas.last_img read more

Health dept prepares districtwise joint action plan to check vectorborne diseases

first_imgKolkata: State Health department has prepared a district-wise joint action plan to check vector-borne diseases and stressed the importance of better surveillance and supervision in the districts.State Health department has instructed district administrative officials to put in place district-level monitoring teams to conduct better surveillance through mobilisation of designated officers who will carry out a detailed survey and submit the report on a daily basis to the district monitoring committee. Also Read – Rain batters Kolkata, cripples normal lifeThe district-wise joint action plan will help the department to strengthen the surveillance process and help the health workers to carry out a drive against the vector-borne diseases in a better way, believe the senior health officials. Due to incessant rainfall, the number of cases related to vector-borne diseases like Dengue, Malaria, Chikungunya has gone up in the state and if people are not aware of how to check the diseases, then it may go up further. According to World Health Organisation (WHO), changes in agricultural practices due to variation in temperature and rainfall can affect the transmission of vector-borne diseases. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedIt may be mentioned that various posts like sanitary inspector, supervisor have already been created in the districts.Teams have also been constituted which will visit houses and record the daily activities and mention their findings before finally submitting them to the supervisors.The Health department has made it mandatory for the teams visiting houses to fill up five different forms. They will also have to make a list of places where Aedes larva is found and then hand over the list to the vector control team in the district. The vector control team will examine the list and hand over to the sanitary inspector.The state-level monitoring committee will chalk out plans on how to check the spread of the diseases after considering the problems of a particular area. The committee will also guide the health workers and formulate resource mobilisation.The vector control team will also fill up a feedback form and submit it to the district magistrate and the chief medical officers of health in the districts. The chief medical officers in the districts will also prepare a surveillance report on a daily basis and submit it to the state Health department.According to a senior Health department official, stress has been given on to identify the fever clusters and develop an integrated action plan which will study and monitor individual cases.The hospitals have been identified in each district where blood samples would be tested. The official also said all the arrangements are there in the hospitals for diagnostic management.WHO says vector-borne diseases account for more than 17% of all infectious diseases, causing more than 7,00,000 deaths across the globe annually.Around 3.9 billion people in over 128 countries are at risk of contracting dengue, with 96 million cases estimated per year. Malaria causes more than 4,00,000 deaths every year globally, most of them children under 5 years of age.last_img read more

One held for issuing fake appointment letter

first_imgKolkata: Bidhannagar South police station has arrested a person for allegedly issuing a fake appointment letter to a job seeker against Rs 3 lakh. The accused Gobinda Ghosh was produced before the Additional Chief Judicial Magistrate’s (ACJM) Court on Tuesday and remanded to 3 days police custody. According to police, Jhilik Nayak, a resident of Daspur in West Midnapore, went to West Bengal Health Recruitment Board (WBHRB) on Monday along with one Debi Prasad Mishra, with an appointment letter in the name of Nayak for a Group D post, which was issued by the Director of Health Service (DHS). Also Read – Rain batters Kolkata, cripples normal lifeNayak claimed that she had gone there to verify her appointment letter. Seeing the letter, Saibal Chakraborty, Secretary & Controller of Examinations of WBHRB got surprised as he had no intimation of such a vacancy. He immediately enquired and found the appointment letter to be fake. Nayak and Mishra were detained and questioned. Later, it was revealed that Mishra, who is an ECG technician of Taldyangra Rural Hospital in Bankura, had come there with Nayak but did not revealed his identity. Nayak informed that Ghosh, who is a resident of Ghola area in Sodepur took Rs 3 lakh from her, promising a job. She also stated that Ghosh went with her but was waiting outside. Immediately, officials and staff from WBHRB detained Ghosh.last_img read more