Are We in the Peak of an Oil Bubble

first_img Explore further Algae: Here, there, and everywhere Citation: Are We in the Peak of an Oil Bubble? (2008, July 7) retrieved 18 August 2019 from https://phys.org/news/2008-07-peak-oil.html Around this time, from mid-2006 to early 2007, supply and demand fluctuated. Then, supply, demand, and price rose together, and have been continuing to rise through the most recent data point, which was taken in early 2008. A comparison of supply and demand showed that, most recently, supply has been exceeding demand by more than a half million barrels per day. Meanwhile, the price continues to increase. Since it appears that the supply-demand balance has only a small effect on the price of oil, the researchers suggest that a major effect lies elsewhere. They point out several reasons why speculation, fed on rumors of rising oil scarcity, may be the positive feedback causing high oil prices. As one motivating factor, investors could be searching for a new high-return investment following the collapse of three recent economic bubbles in the US (communication technology, which peaked in 2000, real-estate in 2006, and sub-prime mortgage lending in 2007). Also, speculation may have increased due to the deregulation of oil futures in the US in early 2006, corresponding to the fluctuations that occurred shortly after that time. Investors may also be concerned about a weakening US dollar, which may encourage protective hedging against future oil price increases.“I expect rather soon some calming with a correction of the price,” Sornette said when asked about his prediction of future oil prices. “But it seems that, for the medium term, one has to be bullish on oil.”More information: Sornette, D.; Woodard, R.; and Zhou, W.-X. “The 2006-2008 Oil Bubble and Beyond.” Arxiv:0806.1170v2. 13 Jun 2008. Submitted to Physica A.Copyright 2008 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 This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. This figure shows the total world oil demand and supply (left scale) and the oil price (right scale) from 2004 to the first quarter of 2008. Data from: International Energy Agency and US Energy Information Administration (https://sp2.img.hsyaolu.com.cn/wp-shlf1314/2020/IMG5377.jpg” alt=”last_img” /> read more

Removing intercalated water from nitrogendoped grapheneoxide sheets

first_img Citation: Removing intercalated water from nitrogen-doped graphene-oxide sheets (2016, April 7) retrieved 18 August 2019 from https://phys.org/news/2016-04-intercalated-nitrogen-doped-graphene-oxide-sheets.html Schematic of the process developed to make NrGO catalysts. Natural graphite (with a d spacing of 3.4 Å) is chemically functionalized and exfoliated using potassium permanganate and sulfuric acid (modified Hummers method) to produce a GO powder with a d spacing of ~1 nm. GO is then subjected to different solvent-rinsing treatments followed by vacuum drying to effectively remove unbound intercalated water as indicated by the decrease in d spacing (8.6 to 5.4 Å, depending on solvent used for rinsing). The resulting dried GO is doped with nitrogen (NH3 at 850°C), leading to the formation of NrGO catalysts with a final d spacing of 3.4 Å. Atoms: C (gray), Mn from KMnO4 (purple), N (blue), O (red), and H (white). Credit: U. Martinez et al. Science Advances (2016). DOI: 10.1126/sciadv.1501178 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. More information: U. Martinez et al. Critical role of intercalated water for electrocatalytically active nitrogen-doped graphitic systems, Science Advances (2016). DOI: 10.1126/sciadv.1501178AbstractGraphitic materials are essential in energy conversion and storage because of their excellent chemical and electrical properties. The strategy for obtaining functional graphitic materials involves graphite oxidation and subsequent dissolution in aqueous media, forming graphene-oxide nanosheets (GNs). Restacked GNs contain substantial intercalated water that can react with heteroatom dopants or the graphene lattice during reduction. We demonstrate that removal of intercalated water using simple solvent treatments causes significant structural reorganization, substantially affecting the oxygen reduction reaction (ORR) activity and stability of nitrogen-doped graphitic systems. Amid contrasting reports describing the ORR activity of GN-based catalysts in alkaline electrolytes, we demonstrate superior activity in an acidic electrolyte with an onset potential of ~0.9 V, a half-wave potential (E½) of 0.71 V, and a selectivity for four-electron reduction of >95%. Further, durability testing showed E½ retention >95% in N2- and O2-saturated solutions after 2000 cycles, demonstrating the highest ORR activity and stability reported to date for GN-based electrocatalysts in acidic media. © 2016 Phys.orglast_img read more

Take this lone culinary journey

first_imgIt is indeed a rare experience when you walk into a restaurant and find it completely empty save for the staff. You first take a step back, wondering if you are indeed at the right place, then you confirm and a certain amount of incredulousness sets in. Well, that was my first brush with Lure Switch, a newly opened restaurant at Tavern on the Greens. The decor is nothing out of the world and it has your regular mish mash of bar and DJ, even a outdoor dining area; the first impression of the restaurant doesn’t really stay with you. The setting is lovely but then the restaurant needs to decide what sort of patrons. Because ‘everything’ won’t work for Lure Switch. Also Read – ‘Playing Jojo was emotionally exhausting’ Now, to the food part. The menu comprises a little bit of this and a little bit of that. So from Thai to Italian to Mediterranean, you could pick and choose according to your whims. Which works for most people, I would guess, especially if you are out in a big group. However, the good thing is that food at Lure Switch is actually quite delectable. After quite some time, I happened to like each of the dish that I tried, the mocktails and the cocktails too were tasty. The portions are large and can easily be split into two. Also Read – Leslie doing new comedy special with Netflix I tried a Peri peri chicken which had hints of almond. The Zesty lemon and garlic shrimps (which were served cold) appeared blah at first, only till the tang of the lemon hit you. The mains were a mix. While I quite liked the grilled basa, the Thai curry was nothing to write home about. The blueberry cheesecake though, more than made up for the disappointment. Purely on food terms, the restaurant has potential.DETAILAt: Tavern on Greens, LadoSarai, Aurobindo MargDecember Timings: 11am to 1 amphone: 9810125070Meal for two: Rs 2,500(without alcohol)last_img read more

When you can jam in the reading room

first_imgTime was there when books used to be serious business. Oh, they still are. Business that is. But no more are they locked within the silent, brooding rooms of a library, or in the glass-fronted cupboards of a salt-and-pepper haired bookstore owner, who would frown over the top of his glasses, as he reverentially handed over one from his collection for you to peruse and buy. As boundaries between creative forms continue to erode, books today are just another form of expression, that is meant to be discussed, debated and thumbed over endless cups of tea, or coffee, not just with friends, within the walls of your bedroom or study, but with strangers, and even the author of the book at the neighbourhood café, that blends with its brew, food for the soul — books, music, photography, the arts or expressions, on paper, canvas and maybe even textiles.  Also Read – ‘Playing Jojo was emotionally exhausting’If a Crossword, Landmark or Oxford Bookstore had added CDs, toys, other knickknacks, and a café to their book outlets, to give patrons the comfort of sipping a steaming cuppa as they browsed through the collection and made their choice of purchase, stores like Cafela, which opened its shutter on Kolkata’s busy Jatin Das Road approximately two months ago, have gone a step further to create an alternate art space. Cafela brings together all kinds of lifestyle offerings such as tribal arts, silver and junk jewellery as well as apparel under one roof, along with a good measure of live music, books and ‘book-and-music events’. The café -store, a brainchild of Sanjoy Som and Dwaipayan Roy, offers a range of mostly continental and British bites and varied brews to add to the experience. Also Read – Leslie doing new comedy special with NetflixIt’s a step forward in the cultural progression of a city that has always enjoyed its adda, or meaningful conversation that can have as its subject something as banal as a traffic jam, or as vibrant as the arts or politics of the state and nation. On one of the walls, to complement the tastefully done up decor at Cafela, hangs a guitar, and patrons are encouraged to pick it up and start an impromptu jam session any time they feel the urge to indulge in some music.  Of course, books are an integral part of the mix. Bookshelves offer poetry, autobiographies and a blend of light and serious reads in both English and Bengali. ‘We have already played host to a book launch and intend to have more book-oriented programmes in the future, book launches, readings and discussions,’ explains poet Souvik Bandopadhyay, who is a creative consultant at the cafè-store. Cafela also regularly hosts musical evenings. ‘The idea was that while there are still places that host artistic discussions over alcohol, there are none that indulges one’s mood for music and literature over coffee. Of course, Calcutta has had its iconic Coffee House, and many a storm was born in the tea-cups here, but as singer Manna Dey said in one of his songs, ‘Coffee House er shei adda ta aaj ar nei (The days of conversing at the Coffee House are long over).’ For today’s generation, hanging out over coffee means spending time at a Barista or Café Coffee Day. We wanted to create an alternative where one can spend time with friends, converse, indulge in music, literature and the arts over coffee,’ says Bandopadhyay. The patrons, he adds, include both the young and the young-at-heart. The popularity of just-opened café-cum-lifestyle-and-arts store can be gauged from the fact that it has already garnered 1,100 ‘likes’ on Facebook and counting.Cafela is not the only one of its kind. Three years ago, the national capital got Kunzum Travel Café at Hauz Khas Village. If you take out the travel theme out of the equation, Cafela and Kunzum share similar character traits. Kunzum was conceptualised by travel photographer and author Ajay Jain, as a place where like-minded people can meet and swap experiences and ideas related to travel. There is no pressure from the servers to order or buy anything. Bookracks with well-thumbed titles, mostly on the travel theme, line the walls. Ajay’s own books and photographs are available for sale. The café hosts book launches, authors’ meets and discussions. Bookclub buffs also gather at Kunzum, and Ajay plans to make it a more regular affair at the café. He is trying to reach out to more independent publishers to launch their new titles at Kunzum. ‘It’s like an offline extension of an online Facebook community,’ says Ajay of Kunzum, adding, ‘With the growth of the social media, more and more strangers are interacting.’Often these interactions and exchange of ideas translate into offline communications. Kunzum offers that space to communicate. Besides book-centric events, the café also hosts talks by traveling photographers and others. Related brands also use Kunzum to hold events or for sales promotions. There are coffee and cookies, too, on offer. But they are not priced. Just drop what you feel like in a box placed near the door.Of course, not everyone is a fan of such a seamless space. Says Ajit Vikram Singh, a passionate book lover who owns the niche bookstore Facts & Fiction bookshop at the national capital, ‘The idea of a café-cum-bookstore is not new.  But you can’t have serious book buying in such a setting. In such places, books are incidental to the whole thing. And rather than the café helping the sale of books, it is the other way round.’last_img read more

Divine forms

first_imgGods and goddesses get a new form through the brush strokes of artist Harish Kumar. His solo show is on in the Capital and in the season of innumerable religious festivities, his canvases fit right in! Gods have always been an integral part of art and sculpture, not only in India but across the world as well, and artistes have always had their freedom to re-interpret divinity through their work. Kumar as a Delhi based artist works from his studio and loves to travel and explores the places so that he can add more colours to his art. His passion remains intact till he grew up. Also Read – ‘Playing Jojo was emotionally exhausting’After having had several exhibitions and solo shows all over India and abroad, He is presents to you his work in really abstracts forms highlighting the fundamental of the rich Indians culture which India gift to the world, a land that offers all that is auspicious, beautiful, calm and serene. He achieves this with is vision of colours, of the bold lines and blends with sharp strokes and soft moods. Being spiritual at heart, Lord Krishna and Buddha remains a theme always close to his heart. It could be evident in his abstract work. WHERE: Hotel Galaxy Shopping & Spa, Sec-15, Gurgaon WHEN: On till 2 October, 11am to 9pmlast_img read more

Elderly couple found dead at guest house in Dakshineswar

first_imgKolkata: Bodies of an elderly couple was recovered from a guest house near Dakshineswar temple on Saturday morning. The duo had checked in at the guest house on T N Biswas Road on Friday night and were supposed to offer prayers at the temple the next morning.The duo — Subrata Niyogi (78) and Kakon Niyogi (70) were residents of Rajendralal Ganguly Lane in Charu Market area in South Kolkata. According to police sources, when the hotel staff knocked the door in the morning, there was no response. The door was bolted from inside and repeated knocks at the door went unanswered. Suspecting something unusual, the hotel authorities informed the Belgharia police station. The cops broke open the door and found their bodies lying motionless on the bed. Also Read – Heavy rain hits traffic, flightsPreliminary enquiry by the police have hinted at suicide with no injury marks on the bodies. However, the motive behind the act is still to be ascertained.”We are waiting for the post-mortem report which will give us an idea of the cause of their death,” a senior police official of Barrackpore Police Commissionerate.The owner of the guest house — Nikunja Bihari Nandy — said the duo had checked in at the hotel at around 8.30 pm on Friday and had instructed him to call them early on Saturday morning as they would visit the temple to offer puja. “One of our staff members went to their room early in the morning to wake them up. But when repeated knocks at the door yielded no response, we called the police,” Nandy said.The police have already informed the family members of the couple. The hotel staff and the family members of the duo are being questioned for further leads.last_img read more

India for implementation of UN embargo to check terror

first_imgIndia has voiced concern over the easy access to arms and weapons provided by some states as a deliberate policy, saying such availability facilitates terrorism across the world.Calling for the strict implementation of the UN Security Council arms embargo to check the menace of global terrorism, India said the use of such weapons against UN peacekeepers by terrorists remained a concern.”India shares the concerns of the international community on the adverse security, political, socio economic and humanitarian impact in states affected by illicit transfers of small arms and light weapons to terrorists, illegal armed groups and unauthorised recipients,” said Asoke Mukerji, India’s Permanent Representative to the UN. Easy availability of such weapons in large numbers and the easy access often provided by some states as deliberate policy has been one of the main reasons for the growth of terrorism in various parts of the world, Mukerji said at a Security Council debate on Wednesday.He also noted with concern the use of such weapons against UN peacekeepers by armed groups and terrorists.last_img read more

Sleep well to avoid body inflammation

first_imgMiddle-aged men who sleep less than six hours or more than 10 hours suffer from low-grade inflammation more often than men sleeping seven-eight hours per night, finds a new study.Furthermore, low-grade inflammation occurs more in people who are overweight, depressed and have diabetes. The study is the first to analyse the association between sleep duration and serum micronutrient concentrations.It found a link between high serum copper concentration and long sleep duration.  Also Read – ‘Playing Jojo was emotionally exhausting’Serum micronutrient concentrations are affected by many factors, including an individual’s general health and diet.“Based on this study, however, it is impossible to say whether sleeping long results in high serum copper concentrations or vice versa,” said Maria Luojus, one of the study researchers from University of Eastern Finland. It has been suggested that high serum copper concentration associates with pro-oxidative stress. Also Read – Leslie doing new comedy special with Netflix“Nevertheless, when the participants’ cardiovascular diseases were taken account for, our results remained unchanged. The association between serum copper concentration and sleep duration persisted independently of cardiovascular diseases,” Luojus explained.The study involved 2,682 men living in Eastern Finland. Earlier studies have also found a relation between reduced sleep and low-grade inflammation.last_img read more