The Berkman Center for Internet & Society and Youth and Media are excited to announce the release of the new ebook “Digitally Connected: Global Perspectives on Youth and Digital Media,” a first-of-its kind collection of essays that offers reflections from diverse perspectives on youth experiences with digital media and with focus on the Global South. It creatively combines adult voices with written and visual contributions by young people from around the world.The ebook is available for download at no cost.In this unique ebook, more than 30 academics, practitioners, government officials, tech industry representatives and activists team up with 25 youth contributors to share their views and opinions about digital technologies and the impact the Internet has on young people’s lives. Collectively, the contributors address questions related to youth and digital media by exploring topics such as safety and wellbeing; identity, privacy and reputation; cultures of learning; creativity; innovation and entrepreneurship; and participation and civic engagement.“By making these diverse reflections and youth contributions available to the public, we hope to continue and further stimulate the global conversation about both the challenges and opportunities children and youth face online,” said Urs Gasser, executive director of the Berkman Center and the book’s co-editor.The ebook is an output of Digitally Connected, an initiative incubated by the Berkman Center in collaboration with UNICEF that brings together a network of people from around the world who, together, are addressing the challenges and opportunities children and youth encounter in the digital environment. Read Full Story
Meanwhile, in the gross split scheme, companies bear upstream costs themselves, but the government receives a smaller cut of the revenue – up to 57 percent – determined in advance.“One benefit of cost recovery is the ability to offer some reward for risks associated with frontier developments,” said Lionel Sumner, research analyst at Wood Mackenzie, in a statement on Sept. 17.“This is important as it could encourage exploration to mitigate Indonesia’s declining production.”Attracting upstream investment is key to realizing Indonesia’s long-term goal of raising oil and gas output and reducing the country’s trade deficit in the sector. The government’s decision to allow oil and gas producers to choose production sharing contracts (PSCs) is a positive step forward for investors in the upstream industry, compared with the less favorable gas ceiling policy, according to energy consultancy Wood Mackenzie.The Energy and Mineral Resources Ministry ruled on July 15 that all producers may choose between either using a gross split-type PSC or a cost recovery-type PSC. The ruling revokes a 2017 regulation that mandated producers to use the gross split.In a cost recovery-based PSC, the government reimburses companies for upstream-related costs in exchange for a higher share – up to 85 percent – of each company’s earnings from exploiting domestic oil and gas blocks. Making PSCs flexible is seen as the ministry’s response to slumping investment amid the economic slowdown. Ambiguities surrounding the calculation of government-company shares under the gross split scheme “have proven unpopular, particularly in the current low oil price environment,” reads Wood Mackenzie’s statement.Brent, a global oil price benchmark, dipped to a low of US$19.33 per barrel in mid-May but had recovered to $43 per barrel as of Friday. Analysts expect prices to remain below $50 per barrel this year.Due to the global economic slowdown, upstream oil and gas investment in Indonesia is forecast to slip by 14.4 percent to $11.8 billion this year, according to the Upstream Oil and Gas Special Regulatory Taskforce (SKK Migas), a development that is expected to affect long-term supply levels.Read also: Indonesia grants oil and gas companies flexibility over production sharing contractsOn the other hand, the ministry’s gas ceiling policy, combined with bureaucratic headwinds, was seen “as deterrents for international investors,” reads the Wood Mackenzie statement.In April, the ministry guaranteed that certain industrial end-users would not be charged more than $6 per million British thermal units (mmbtu) of natural gas, below the $8 per mmbtu market average, for the next four years.While President Joko “Jokowi” Widodo has stated that he wishes to boost Indonesia’s industrial sector, which contributes one of the largest proportions of gross domestic product (GDP), the price ceiling has unsettled oil and gas investors.A case in point is Spain’s Repsol, which has hit a snag developing the Sakakemang Block as the company cannot reach economical scale at $6 per mmbtu, according to the Upstream Oil and Gas Special Regulatory Task Force (SKK Migas).The Sakakemang Block holds Indonesia’s largest gas find in almost two decades.“We, from the commercial division, have intervened to determine whether or not this can proceed,” said SKK Migas deputy for finance and monetization Arief Handoko on Aug. 6.Read also: 197 companies secure cheap gas prices, contracts to be signed in MayTo attract investment, the government has issued other incentives such as easing taxes for liquefied natural gas (LNG) and pushing back deadlines to pay annual abandonment and site restoration (ASR) fees.The government initially planned to auction 10 blocks this year but oil and gas companies stepped back after oil prices collapsed, forcing the companies to cut capital spending by around 30 percent, according to the energy ministry’s acting oil and gas director general, Ego Syahrial on Aug. 5.Ego said his office would delay all 10 block auctions slated for 2020 until the fourth quarter “with the hope that oil prices will be back to normal by then.”Topics :
Inside the spacious kitchen and living areas at Lume Kangaroo Point.Ms Anstey said she was thrilled to see the vision come to life.“Our vision for Lume was to forge a particular lifestyle for our residents that encompasses all of the luxuries of absolute city living,” Ms Anstey said.“We wanted to redefine residential development for southeast Queensland”.Lume is positioned on the corner of Shafston Ave and Main St in the iconic riverside suburb which will soon have the added benefit of a direct pedestrian access to Brisbane City via a new footbridge. The remaining one, two and three bedroom apartments are available with a variety of floor plans and priced from $450,000 to $1,695,000. Enjoy the views of Brisbane City from Lume Kangaroo Point.The project ticked all of the boxes for buyers Greg and Jo-Anne Clarke who sold their property in northern NSW to re-embrace a cosmopolitan lifestyle.“We were looking for a prestigious inner-city apartment in Brisbane to relocate from our Bangalow property and immediately fell in love with Lume,” Mr Clarke said. Won over by the quality of build and meticulous design, the couple were quick to secure a secondary apartment as an investment.“Devcorp’s attention to detail was so impressive, we looked at the plans in the morning and signed up for two apartments by the afternoon,” he said.The Clarkes bought a three-bedroom terraced apartment that features 150sq m of outdoor entertaining space.The couple are among several rural and coastal owner-occupiers who have purchased in Lume with a “city luxe’’ upgrade in mind. Attracted to the resort-style amenities, buyers are swarming to Brisbane’s city fringes, switching acreage for accessibility. Lume Kangaroo Point.A wave of rural and coastal owner-occupiers is snapping up apartments at Kangaroo Point’s newest “crown jewel’’ Lume.Drawing buyers backs to Brisbane city living, developer Devcorp’s luxury residential development features 2.7m high ceilings, floor-to-ceiling glass and floorplans that create a seamless flow from indoor to outdoor. Lume Kangaroo Point has been developed by Devcorp.Currently 76 apartments have sold from a total of 115.Devcorp’s sales manager Brittany said managing director Murray Thornton made a decision mid build to amalgamate a series of units, identifying a gap in the market for downsizers who did not necessarily require three bedrooms but found the living spaces in most two bedroom apartments were significantly condensed. “With this in mind, he amalgamated two one-bedroom apartments that look over toward New Farm, still with city views,’’ she said.“This has allowed for the inclusion of little luxuries such as a butler’s pantry in the kitchen, large study, cross ventilation with two balconies as well as master and guest bedrooms on complete opposite sides of the apartment to allow for optimal privacy.More from newsParks and wildlife the new lust-haves post coronavirus10 hours agoNoosa’s best beachfront penthouse is about to hit the market10 hours ago“It has also created extremely generous dining and living spaces – ideal for the empty nesters who love to entertain.’’
One of the top pound-for-pound fighters in the world has a new promotional team along with a new network.It was announced Wednesday that WBC super flyweight champion Juan Francisco Estrada has agreed to a multifight deal with Matchroom Boxing, with all of his fights airing on DAZN. An announcement from Estrada is expected to be made next week on when he would make his debut for the promotion and the streaming service. A trilogy bout with Srisaket Sor Rungvisai is among the possibilities. “I’m very excited to be fighting again on DAZN where I won the WBC title,” Estrada said in a press release. “I look forward to defending my title for Mexico and for all my fans and hopefully I can soon unify titles with the other champions of the division. “I’m very motivated being champion once again and I’m ready to show that I’m a champion to be reckoned with.”Join DAZN and watch more than 100 fight nights a year Estrada (39-3 26 KOs), a former unified flyweight champion, became a two-division world champion and put himself among boxing’s elite in April when he outboxed Rungvisai in the early going and outlasted a late surge from the former champion to win by unanimous decision and avenge his narrow majority decision loss to the Thai star in February 2018.“I’m delighted to welcome pound-for-pound star Juan Estrada to the team,” said Matchroom Boxing promoter Eddie Hearn. “We have been working closely with Zanfer over the last year and this is an exciting addition to DAZN.“Estrada was outstanding in capturing the WBC and Ring Magazine belts in LA in April and looks now to move on and unify the division. We look forward to a long and successful partnership.”Estrada’s signing with DAZN adds to a growing stable of fighters who have recently signed with the global streaming service that includes Anthony Joshua, Saul “Canelo” Alvarez, Gennadiy Golovkin, Daniel Jacobs, Tevin Farmer, Oleksandr Usyk and Demetrius Andrade.
“It’s always good to find that spark,” said Hoopa senior forward Blake … Hoopa >> The goal of any Hoopa Valley boys basketball team is to start fast and never truly let up the pace from there.The Warriors certainly accomplished that.Throw in solid defense, too, and good things happened.Four Hoopa Valley players scored in double figures as the Warriors led start to finish in an impressive 86-49 win over South Fork in the opening round of the Dick Niclai Tournament on Tuesday night.
This article is only available to GBA Prime Members Two books that do a good job of explaining residential energy use issues to homeowners are Consumer Guide To Home Energy Savings and No-Regrets Remodeling. Both books have been around for years. Recently the publishers of these two books issued new editions, so I decided to give them a careful read.Since 1990, the American Council for an Energy-Efficient Economy (ACEEE) has published the Consumer Guide To Home Energy Savings. The current version is the tenth edition; its authors — Jennifer Thorne Amann, Alex Wilson, and Katie Ackerly — are the same as those of the ninth edition.This book is an excellent homeowner’s guide to reducing home energy use. The authors make a stab at addressing basic building science concepts — for example, by explaining what a thermal envelope is, and by discussing the importance of air barriers. Most of the book’s information is accurate and helpful.Yet the book is occasionally troubling and ultimately unsatisfying — both for its many errors and its fundamental failure to help homeowners focus on what matters most. The authors seem to lurch from topic to topic, in an apparent attempt to be comprehensive, without providing enough context to help homeowners distinguish between trivial and crucial issues.Examples of misplaced emphasis abound: Is adding insulation to your attic a simple job? The authors advise, “Adding insulation to an unheated attic is usually a lot easier [than adding insulation to walls]. If there is no floor in the attic, simply add more insulation.” The adverb “simply” is irksome.Unfortunately, this section of the book forgot an important sentence: “Before adding more attic insulation, make sure that you have sealed all of the air leaks in the ceiling below.” While the book mentions air sealing elsewhere, readers need… Start Free Trial Already a member? Log in Sign up for a free trial and get instant access to this article as well as GBA’s complete library of premium articles and construction details.
Cover story: a new milestone in organic luminescent labeling. Credit: Science Advances, doi: 10.1126/sciadv.aau7310 Left: Dynamics of emerging and disappearing phosphorescence. (A) Normalized phosphorescent intensity of freshly prepared samples as a function of illumination time for different UV intensities ranging from 0.1 to 7.0 mW cm−2. (B) Illumination intensity dependences of required time to reach 50% of total phosphorescent emission. (C) Normalized phosphorescence as a function of storage time for two different film thicknesses, 600 nm (light red circles) and 35 to 40 μm (dark red squares), stored and measured under ambient conditions. The emission increase at the beginning is reproducible and under further investigation. (D) Normalized phosphorescence as a function of heating time. Right: Coatings on different substrates. (A) Flexible luminescent tag realized by spin-coating the emitting layer in between two barrier films in ambient light and showing written phosphorescence. (B) Flexible adhesive tag applied to a cylindrical glass bottle and containing information about the content, readable by eye and any quick response (QR) detector, and fully invisible when not read out. (C) Conventional monochrome photograph of the NYC skyline coated by drop-casting the emitting layer in between two barrier layers showing a programmable luminescent caption. (D) Transmission of an emitting layer similar to the one on top of the photo in (C) compared to 1-mm pure glass. Credit: Science Advances, doi: 10.1126/sciadv.aau7310. The scientists observed long-lasting, room-temperature phosphorescence due to moderate spin orbit coupling and dense packing of the PMMA polymers in the absence of oxygen. Analogously, to prevent the exposure of the phosphorescence emitting layer to oxygen, Gmelch et al. deposited a 600 nm thick oxygen-barrier-layer on top of the sample. However, since the scientists fabricated the samples under ambient conditions, the emitting layer contained molecular oxygen. Invisible tags: Physicists write, read and erase using light Energetic scheme, device structure, and emission with and without oxygen quenching. (A) Electron excitation by UV light to the excited singlet state S1 of NPB with following fluorescence or ISC to the excited triplet state T1. (B) NPB T1 state depopulation in the presence of oxygen via triplet-triplet interaction with molecular oxygen and therefore excited singlet oxygen generation. (C) Blue fluorescent emission in continuous wave (CW) excitation, no delayed phosphorescence in the presence of oxygen. (Photo credit: F.F., Dresden Integrated Center for Applied Physics and Photonic Materials). (D) Device structure. The emitting- and barrier-layer thicknesses are 900 and 600 nm, respectively. (E) NPB T1 state depopulation without surrounding oxygen via visible phosphorescence with a lifetime of τ = 406 ms. (F) Blue fluorescent emission in continuous wave excitation and delayed response in the absence of oxygen. Greenish-yellow phosphorescence is visible. Credit: Science Advances, doi: 10.1126/sciadv.aau7310 , Nature Explore further After excitation with UV light (365 nm wavelength), the NPB molecules reached their excited singlet state (S1), from which they either decayed back to the ground state to emit fluorescence, or populated the excited triple state T1 through intersystem crossing (a radiationless process of transition between two electronic states with different spin). The observed experimental energy levels fit well with values in the literature. A promising approach for light-based labeling involves the local removal of molecular oxygen using UV irradiation. However, this technique has only been reported in solution thus far. In the present work, Gmelch et al. implemented the technique on the fabricated thin solid film. In this case, the scientists experimentally excited the NPB emitter to the triplet state (T1) from which they were quenched by interacting with the triplet ground state of molecular oxygen (T0). By design, the resulting excited singlet oxygen density decreased by interacting with the local environment of the emitter, i.e. via PMMA material oxidation at the spots of illumination, giving rise to phosphorescence. The emission was immediately visible for a long lifetime of τ = 406 ms, after switching off the UV illumination. The process described by Gmelch et al. thus activated luminescence for the first time by removing oxygen from inside a thin film. They used the technology of UV light-dependent oxygen consumption as a writing tool to create an image on a substrate/material. Image writing using UV light. By masked UV illumination of the sample, a phosphorescent pattern is printed into the transparent sample. Here, pulsed excitation with a frequency of 1 Hz is used. When taking only one video frame during the off-time of the excitation, the emergence of the phosphorescence is clearly visible. The time delay of each frame to the corresponding switch-off is held constant. The playback speed is accelerated by a factor of 10. Credit: Science Advances, doi: 10.1126/sciadv.aau7310. , Journal of Chemical Education Luminescent emission in the form of phosphorescence commonly occurs in daily life as a result of a quantum mechanically small transition probability. A luminescent emission lifetime can last from microseconds to several hours. Popularly known for its use in glow-in-the-dark products and as emergency sign illuminants in public buildings, it is also a practical method for information storage, including stamp detection and verification. While easy and cost-effective fabrication methods presently exist to engineer phosphorescence systems using organic emitters, achieving visible organic phosphorescence under ambient conditions in lab for industrial translation is challenging. In a recent study, now published in Science Advances, Max Gmelch and colleagues at the Dresden University of Technology report a new milestone in organic luminescent labeling. For this, they used a simple device structure made from commonly available materials to generate ultrathin, flexible and transparent luminescent coatings. The resulting labeling device was fast, with ability to print more than 40 cycles of information onto any substrate of any size, at high resolution. The scientists used light alone, without any ink, to print a luminescent message onto the material. The contactless process could also erase the image from the same material. The concept represents a promising method to produce luminescent on-demand tags to store information and supersede conventional labeling techniques. In the study, Gmelch et al. used an ultrathin emitting material layer with a thickness of 900 nm, predominantly containing poly(methyl methacrylate) (PMMA) also known as acrylic glass. They included a guest molecule known as NPB (N,N’-di(1-napthyl)N,N’-diphenyl-(1,1′-biphenyl)-4,4′-diamine), a commonly available hole transport material (charge extraction and transportation) used in organic light emitting diode (OLED) technology. The scientists engineered the thin translucent coating for luminescent labeling by combining the two materials (PMMA:NPB). Depending on the substrate of interest, the coating can also be used on a variety of different surfaces via spin coating, spray coating or dip coating. The values of light intensity and the time required for illumination presented in the study were far below those required by previous techniques, with potential for feasible industrial applications. The study also showed that an imperfect oxygen barrier could lead to the reappearance of oxygen in the activated areas in time. The length of time required for the disappearance of phosphorescence depended on the thickness of the oxygen barrier layer. For example, a spin-coated layer with a 600 nm thickness presented phosphorescence up to five hours, while those with thicker oxygen-barrier films (35 to 40 µm) extended the phenomenon to more than one day. The scientists could increase retention time frames with an improved barrier material or by further increasing the material thickness. To quickly erase a print, the scientists used oxygen refilling through accelerated sample heating with IR or a simple hotplate. As with printing, the time required for phosphorescence deletion depended on the barrier-layer thickness and temperature. © 2019 Science X Network The scientists tested a variety of substrate materials as surfaces for phosphorescence illumination. The work included customary photographs with the New York City skyline for large-area application. Since the emission coating was fully invisible when inactive, the materials served as a substrate for programmable on-demand caption projection. Gmelch et al further demonstrated the higher transparency of the coating compared with pure glass (1 mm). In this way, Gmelch et al. realized a fully accessible optical method for writing, reading and erasing on a material for information storage. The work showed the possibility of repeatable noncontact labeling and reading with a resolution beyond the commonly observed printer quality. Gmelch et al. propose the use of highly scalable processes for materials fabrication next. The readout resolution in the work was sufficient to store an information depth of 7 kB cm-2, which is equal to five pages of plain text. The technique opens a new path for information storage beyond permanent data encoding at low-cost and high scaling. The new work will have practical potential in the field of industrial logistics (labeling, tracking and transport). Journal information: Science Advances Image reading/erasing using UV light. After having finished the writing process, the mask is removed. Subsequent UV illumination of the whole sample only gives rise to phosphorescence at the activated area. Again, pulsed excitation with a frequency of 1 Hz is used. Credit: Science Advances, doi: 10.1126/sciadv.aau7310. More information: Max Gmelch et al. Programmable transparent organic luminescent tags, Science Advances (2019). DOI: 10.1126/sciadv.aau7310 Patricia B. O’Hara et al. Turning on the Light: Lessons from Luminescence, Journal of Chemical Education (2009). DOI: 10.1021/ed082p49 Stephen R. Forrest. The path to ubiquitous and low-cost organic electronic appliances on plastic, Nature (2004). DOI: 10.1038/nature02498 The phosphorescent images could be erased as fast and easily by applying infrared (IR) light of a wavelength of 4 µm for approximately one minute. In this instance, the radiation was absorbed by the PMMA, and the temperature increased approximately to about 90 degrees C to 100 degrees C, which was low enough to maintain thermal stability of all materials used in the study. Solidity of the material layers was well conserved during the whole process of erasing, while further write and erase cycles were subsequently allowed. Gmelch et al. observed the decreasing intensity of phosphorescence during each cycle due to photobleaching (degradation of emitter molecules) and oxygen consumption (due to increased nonradiative losses owing to matrix change). Yet, even after 40 cycles, the emission rate reached 40 percent of its initial value—sufficiently detectable by eye or camera. Citation: Programmable transparent organic luminescent tags–writing with light (2019, February 6) retrieved 18 August 2019 from https://phys.org/news/2019-02-programmable-transparent-luminescent-tagswriting.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.