13/11/2017

Your Boss Just Rejected Your Idea? Ask These 3 Questions Right Away

With every rejection, there is a valuable lesson to be learned.



BY RICHARD MOY—THE MUSE3 MINUTE READ
I wish I could tell you that your manager will always love your ideas. But unfortunately, as you probably already know, that’s not the case.
And whenever she shoots something down, you’ll want to deliver a monologue along the lines of, “You’re missing the brilliance behind my thinking and should be taken to a hospital.” Or, you might let yourself believe that you’re a failure and that you should just quit now. Or you might even lash out and holler about how they “never” listen to you.
As cathartic as those reactions might feel, none of them are actually productive. To help you move on and learn from every rejection, make these phrases a regular part of your vocabulary.
1. “WHAT WOULD MAKE YOU SAY YES TO THIS IDEA?”
Your idea is toast when your manager shuts it down, right? Well, it doesn’t have to be. Your original thinking might’ve been off the mark, but that doesn’t mean there isn’t anything worth salvaging from it. And chances are, your boss would agree with with that.
So instead of accepting defeat, ask questions like “What would make you say yes?” and “Is there any part of the idea that did resonate?”


Those answers will help you understand what worked and what didn’t. Then, use that feedback to come up with something else that’s more impactful and even more difficult for your boss to shake her head at.
2. “THANKS FOR YOUR FEEDBACK, WOULD IT MAKE SENSE FOR ME TO BRING IT UP AGAIN IN A FEW WEEKS/MONTHS?”
It’s worth saying this again, so I will: You’re smart, you bring a lot to the table, and you have a lot of good ideas. But nobody on the face of the planet has ever had 100% of their ideas implemented. At the same time, it doesn’t necessarily mean that they’re bad. I’ve lost count of the number of times my manager has said to me, “This is interesting, but we have bigger fish to fry. Let’s revisit this in the future.”
But why not now, right? After all, you haven’t presented something ridiculous. Why can’t your manager move things around to accommodate you? Reread those questions and think about how they sound. Would you respond in kind to someone who made this much of a push?


Instead, simply thank your manager for the feedback and ask if there’s a specific time period during which she feels you could explore it further. You’ll be able to gauge from her response whether she’s genuinely into the idea or just avoiding shutting you down altogether.
3. “WHAT SHOULD I FOCUS ON INSTEAD?”
You could very easily shut down after you, well, get shut down. It might even feel like you don’t have anything else worth working on, especially now that your idea is off the table. But it’s also important to remember that you still have plenty of other things to do at work. And even though your manager said “no thanks,” I’m willing to bet that she has bigger priorities on her plate that she could use your help with.
So, instead of pouting, find out what you can be working on instead. This response will show her that you’re truly a team player, even when you’ve been shut down. And if and when there is a fit for one of your brilliant ideas, your boss will remember just how helpful you are and make sure you get the resources needed to accomplish it.


So far, we’ve talked about what to do when your idea gets shot down. And that’s a great start. But are you still feeling like you should keep your “big” mouth shut? Does it seem easier to keep your thoughts to yourself, especially if your boss always says no to your ideas?
I hope you don’t buy into that idea.
Raising your hand (either literally or metaphorically) takes guts. And every time you do it, it gets a little easier and a little less scary. So don’t stop speaking up. Instead, push yourself to turn every single rejection into a lesson. Eventually, you’ll get so good at pitching your ideas that they’ll be (almost) impossible to turn down


Trump casts doubt on allegations against Roy Moore, leaving Republicans an impossible choice

Trump casts doubt on allegations against Roy Moore, leaving Republicans an impossible choice
By Aaron Blake November 10 



Then-President-elect Trump gives the thumbs-up as Mitt Romney leaves Trump National Golf Club in Bedminster, N.J. (Carolyn Kaster/AP)
A day after Senate Republicans tried to buy some time amid the allegation that Alabama's GOP Senate candidate Roy Moore had initiated sexual contact with a 14-year-old when he was 32, the last two GOP presidential nominees pulled them in opposite directions.
While President Trump cast increasing doubt on the accusations, Mitt Romney issued a strong statement that puts pressure on other Republicans to denounce Moore.
In a written statement delivered by press secretary Sarah Huckabee Sanders, Trump joined in the Senate GOP's he-should-drop-out-if-it's-true chorus, but also noticeably upped the doubt factor as to whether the accusations are true.
“Like most Americans, the president believes that we cannot allow a mere allegation — in this case, one from many years ago — to destroy a person's life,” Sanders said. “However, the president also believes that if these allegations are true, Judge Moore will do the right thing and step aside.”
Two parts of that stand out: The words “mere allegation” and “one from many years ago.” Up front — and unlike the reactions from Senate Republicans — Trump decided he would like to stress that these accusations might not be true. This is perhaps understandable and to be expected from another politician who has been accused of sexual misconduct and strenuously denied it.
Alabama Senate candidate Roy Moore denied allegations of sexual misconduct on Nov. 10 and called them "politically motivated." Senate Majority Leader Mitch McConnell (R-Ky.) said Moore should withdraw from the race if allegations are true. (Video: Jordan Frasier, Bastien Inzaurralde/Photo: Melina Mara/The Washington Post)
Given that Trump called his own accusers liars during the 2016 campaign, it stands to reason that he might think that Moore's accusers are also liars. Indeed, it would be somewhat odd if Trump took these accusations to be true and called on Moore to drop out, given his own responses to allegations against him and his own decision to avoid calls to drop out. Trump also defended Bill O'Reilly against sexual harassment claims, saying he didn't think the former Fox News host “did anything wrong.” O'Reilly settled one of those claims for $32 million.
But Trump's comments also are in stark contrast to the previous Republican presidential nominee, Romney, who tweeted Friday morning that the GOP shouldn't bother with reasonable doubt and said Moore should drop out now.
It's not clear that Romney's tweet is a direct response to the president or even just to the Senate Republicans who have decided to withhold final judgment on all of this. While those Republicans have said Moore should drop out if the allegations are true, Moore seems bent on denying them to the end, and it's very unlikely we'll ever have definitive proof of a decades-old encounter between two people. In other words, Senate Republicans' comments don't seem all that likely to force Moore out.
But buying time is about all these comments did. At some point (and soon, given that the election is a little more than a month away), Republicans are going to have to decide whether to line up with Trump or with Romney — whether to grant Moore the reasonable doubt that Trump emphasizes or to decide that reasonable doubt need not apply here.
As James Hohmann notes in today's Daily 202, the Alabama Republican Party holds the power to boot Moore from the race and spur a write-in campaign to hold the seat for Republicans. But those same Alabama Republicans seem to be standing behind Moore. Unless and until the Senate GOP and the GOP establishment decides it is going to force the issue more than it did Thursday, it seems unlikely they'll ever get any resolution besides Moore finishing the race.


AP FACT CHECK: Trump on veterans' health care, economy

AP FACT CHECK: Trump on veterans' health care, economy
الوصف: Associated Press CALVIN WOODWARD and HOPE YEN,Associated Press 3 hours ago 

·          
U.S. President Donald Trump, left, speaks with Philippine President Rodrigo Duterte before the opening ceremony of the 31st Association of Southeast Asian Nations (ASEAN) Summit in Manila, Philippines, Monday, Nov. 13, 2017. (Mark Cristino/Pool Photo via AP)
WASHINGTON (AP) — Veterans Day prompted President Donald Trump and his administration to take stock of what's been done to fix health care for those in uniform. They claimed more progress than has been made.
That tendency to overreach extended to trade and the economy as Trump visited Japan, South Korea, Japan and then Vietnam, where he told U.S. veterans of the Vietnam War that the Department of Veterans Affairs has made "amazing" strides and already "is a whole new place."
His remarks and a White House account of progress at the VA did not acknowledge old problems that persist. For example, a key effort to improve waiting times by revamping the VA's electronic medical record system may not be completed for eight more years — when Trump will be out of office.
A look at some statements about the VA and other topics arising from his travels and over the past week:
WHITE HOUSE: "President Trump signed the Veterans Appeals Improvement and Modernization Act of 2017, taking action to streamline the appeals process for disability compensation claims within the VA. More than 470,000 veterans are awaiting pending decisions regarding their appeals."
THE FACTS: Trump signed the bill in August, part of a bid to reduce a rapidly growing claims backlog, but its immediate impact is overstated, as it will have no effect on the 470,000 pending claims.
Under the legislation, veterans will be able to file "express" appeals if they waive their right to a hearing or the ability to submit new evidence.
While lawmakers hope the legislation ultimately could reduce average wait times to less than a year, it applies almost entirely to newly filed appeals.
Veterans Affairs Secretary David Shulkin has said the VA would need Congress to approve an additional $800 million for "hiring surges" of additional appeals processors if the VA hoped to clear its current backlog within 10 years.
___
TRUMP: "Right now, our trade with Japan is not fair and it's not open, but I know it will be, soon. We want free and reciprocal trade, but right now our trade with Japan is not free and it's not reciprocal." And: "Many millions of cars are sold by Japan into the United States, whereas virtually no cars go from the United States into Japan." — remarks to business leaders in Tokyo on Monday.
THE FACTS: When Trump calls for reciprocity in Japan-U.S. trade, he might want to be careful what he wishes for.
With autos, for example, Japan places no tariff on fully assembled vehicles that are imported. But the U.S. has a 2.5 percent tariff on most imported vehicles — 25 percent on pickup trucks. That imbalance — or lack of reciprocity — favors the U.S.
It's true U.S. vehicle sales in Japan pale in comparison with Japanese sales in the U.S. Detroit has long complained about regulations that stop U.S. carmakers from opening dealerships or selling cars in Japan. But there are other reasons for the disparity in the auto trade, as well. For example, Japan uses right-hand-drive vehicles; the U.S. mainly makes left-hand-drive vehicles in its domestic industry.
And Trump's point about Japanese vehicles pouring into the U.S. is somewhat off the mark. Made-in-Japan vehicles are a distinct minority of the vehicles sold in the U.S. by Japanese automakers.
More than half the vehicles sold in the U.S. by Japanese manufacturers are built in the U.S., says the Japan Automobile Manufacturers Association. Three-quarters of them are built in North America.
___
WHITE HOUSE statement Thursday: "President Trump announced that the Department of Veterans Affairs will adopt the same Electronic Health Record as the Department of Defense. VA's adoption ... will ultimately result in all patient data residing in one common system, enabling the immediate availability of service members' medical records and seamless care between the departments."
THE FACTS: While the administration did announce in June that it would overhaul the VA's aging information technology system, Shulkin admitted to Congress last month that the project to revamp electronic medical records won't be completed for seven to eight years. The full costs of the project also are not known and have yet to be budgeted.
An upgraded IT system is central to the VA's effort to reduce wait times for medical care as well as to fulfill Trump's promise of increasing private care options for veterans. Under Shulkin's plan to expand the Choice private-sector program, the VA would outsource more routine veterans' care to private providers including MinuteClinics while treating more complex injuries. Success of that plan requires a seamless sharing of medical records not only with the Pentagon but also with private physicians, a capability the VA does not currently have.
Shulkin also has yet to negotiate pricing for the no-bid contract with the company that designed the Pentagon's IT system, estimated to cost at least $16 billion. The big price tag has spurred bills in Congress to require regular updates from the VA on timeliness and cost projections, as well as risks such as breaches to patient privacy.
___
WILBUR ROSS, U.S. commerce secretary: "Today's signings are a good example of how we can productively build up our bilateral trade." — remarks Thursday in Beijing.
XI JINPING, China's president: "During this visit, the two sides signed over $250 billion U.S. of commercial deals and two-way investment agreements." — remarks Thursday in Beijing.
THE FACTS: Papers signed in China during Trump's visit were largely a packaging of previously worked-out deals, tentative investments, statements of intent and extensions of business with existing Chinese customers, with some new orders. They do not point to a turnaround in deep-seated trade tensions between China and the U.S.
Such signing ceremonies in China are often just that, ceremonial. They typically represent purchases that Chinese customers already planned to make and held off on announcing. General Motors' $2.2 billion piece of the package, for example, consists mostly of selling parts to its existing joint venture with the Chinese government.
Alaska, however, welcomed an agreement that could spur construction of a long-sought pipeline to ship natural gas from the North Slope to a port for export to Asia. Oil companies backed away from the project, but the agreement with Chinese interests means all parties will work toward a decision by the end of next year on whether to proceed.
___
WHITE HOUSE: "President Trump has ensured continued access to care in the Veterans Choice Program by signing the VA Choice and Quality Employment Act, authorizing $2.1 billion in additional funds for the Veterans Choice Program."
THE FACTS: This statement glosses over one of several budget shortfalls by the VA. Congress was forced in August to approve $2.1 billion in emergency money to keep Choice running after the VA had repeatedly understated costs of the program, assuring lawmakers for much of the year that money would last until January. Shulkin subsequently revealed an emergency shortfall in June that threatened medical care for tens of thousands of veterans.
The $2.1 billion was intended to last until February. But weeks after receiving the money, the VA acknowledged that money for Choice would again run out sooner than expected, requiring Congress to approve additional stopgap financing before the end of the year or face disruptions to veterans' health care.
Lawmakers have yet to act, in part as the Trump administration sorts out longer-term costs to the private-sector program.
___
WHITE HOUSE: "The VA has launched its 'Access and Quality Tool,' allowing veterans to see online the wait times at VA locations."
THE FACTS: An effort started by Shulkin when he was VA undersecretary of health in President Barack Obama's administration, the VA website www.accesstocare.va.gov provides data on wait times as well as on veterans' satisfaction ratings in getting timely appointments, something that no other health care system in the country does.
Still, major veterans groups such as Veterans of Foreign Wars have faulted the data for being misleading and not depicting wait times the way a typical person would view it.
The Government Accountability Office, for instance, has noted that the data for returning patients do not include the amount of wait time from when a veteran initially asks for care and when a scheduler reaches out to set an appointment, which it said could be lengthy. In addition, GAO earlier this year continued to find evidence that VA data can be unreliable because of schedulers recording wrong dates or changing dates outright, though the VA says it is implementing new checks and training to help identify "outliers" in scheduling.
Veterans of Foreign Wars told Congress last month that its survey found only 67 percent of veterans said they had obtained a VA appointment within 30 days, less than the 93 percent that VA reports.
___
WHITE HOUSE: "The White House has opened a brand new VA Hotline staffed principally by veterans and direct family members of veterans to ensure that no complaint goes unaddressed."
THE FACTS: It opened, but it did not get off to a smooth start. Trump pledged during the presidential campaign to create a "private White House hotline" answered by a real person 24 hours a day to take complaints from veterans, leading the VA to create a hotline beginning in June. Originally scheduled to be fully operational by Aug. 15, it has encountered some delays. In a letter to the VA last month, Sen. Jon Tester, the top Democrat on the Veterans Affairs Committee, complained, "The White House is frequently routing these calls back to local VA offices, which are often understaffed and do not have the ability to address the additional casework in a timely manner."
Tester noted the VA already had several existing options for receiving complaints from veterans and urged better coordination to make sure no one falls through the cracks.
___
TRUMP: "Numbers are phenomenal over the last — since November 8th, Election Day. Our unemployment is at a 17-year low. We've gotten almost 2 million more people in the workforce in just that short period of time. I've reduced regulations terrifically, frankly, if I do say so myself." — remarks to business leaders in Tokyo, Monday. Tweet from previous weekend: "Unemployment is down to 4.1%, lowest in 17 years. 1.5 million new jobs created since I took office. Highest stock Market ever, up $5.4 trill."
THE FACTS: His numbers are close to the mark. Trump can rightfully brag about the U.S. economy, but it's not quite as exceptional as he says, and he can't yet legitimately claim that his record on job creation is vastly superior to Obama's. Many of the economic figures he cites are advancing a recovery from the Great Recession that dates back to the middle of 2009.
The unemployment rate did slip to 4.1 percent in October. But that was in part because many Americans gave up searching for work — one of the criticisms Trump made of Obama's record during the 2016 campaign.
Trump also takes credit for helping create on average 168,500 jobs a month, but Obama in 2016 averaged about 187,000 jobs a month. Of course, hiring should slow as the unemployment rate declines because fewer people are searching for work. When someone stops seeking a job and drops out of the labor force, this person is no longer counted among the officially unemployed.
As for the stock market, the Dow Jones Industrial Average returned to its previous peak in March 2013 and has been setting records ever since. The promise of corporate tax cuts by Trump has helped the stock market, but many of the gains rest on the foundations of an economic recovery that saw corporate profits climb.
___
Associated Press writers David Koenig in Dallas, Tom Krisher in Detroit and Joe McDonald in Beijing contributed to this report.


Research Reveals AI Health Coaches As Effective as In-Person Professionals for Diabetes Prevention

Research Reveals AI Health Coaches As Effective as In-Person Professionals for Diabetes Prevention
by Jasmine Pennic 11/10/2017 1 Comment




New peer-reviewed findings published in JMIR Diabetes reveals that an artificial intelligence (AI) health coaches is just as effective as in-person weight loss programs, such as the Centers for Disease Control and Prevention-led National Diabetes Prevention Program (DPP), a clinically-proven weight loss program focused on type 2 diabetes prevention.
The peer-reviewed research suggests AI has comparable results to the Diabetes Prevention Program by observing Lark, an AI chronic disease platform that brings unlimited, one-on-one chronic disease prevention and management to payors and employers. Lark’s AI Health Coach monitors a patient’s health through phone sensors and integrated health devices, then mimics nurses’ empathetic counseling through text-based communication. For example, if you wake up in the middle of the night craving a treat, Lark can steer you towards a healthier option.
Study Findings & Results
Participants in the study could have unlimited coaching sessions with Lark. They averaged 103 individual coaching sessions over the course of the study. Users lost an average of 2.4 kg (or 2.4 percent body weight), compared with an average of 2.32 kg reported in a DPP meta-analysis of 22 lifestyle intervention studies with in-person components. Additionally, the percentage of healthy meals eaten increased by 31 percent. Patients were engaged with their health coach and reported a satisfaction score of 87 out of 100.
The longitudinal study observed weight loss, changes in meal quality, and app acceptability among 239 overweight (body mass index ≥ 25) patients who used the Lark Weight Loss Health Coach, which encourages weight loss through elements of cognitive behavioral therapy. The Lark AI Health Coach monitors a patient’s health through phone sensors and integrated health devices, and then mimics nurses’ empathetic counseling through casual conversations that use text-based communication and other interactive elements.
Lark is the only fully-AI driven Diabetes Prevention Program recognized by CDC, and was designed by leading behavior change experts and health faculty from Harvard and Stanford. Its AI chronic disease solution was developed over the past six years through 355 million interactions with a million patients. Lark is available to patients anytime, anywhere, and is infinitely scalable. With this ease of use, Lark has engaged 83 percent of DPP-eligible patients within 72 hours of being referred to its AI platform. This year, Lark became the first AI-led DPP to be fully reimbursable with a CPT code.
The full study, “A Fully Automated Conversational Artificial Intelligence for Weight Loss: Longitudinal Observational Study Among Overweight and Obese Adults” is available at https://diabetes.jmir.org/.


02/11/2017

Bill Gates and Steve Jobs raised their kids tech-free — and it should've been a red flag


Bill Gates and Steve Jobs raised their kids tech-free — and it should've been a red flag
A new book suggests the signs may have been clear a decade ago, based on the attitudes of Silicon Valley elite, that smartphone use should be regulated.
Subscribe
أسفل النموذج
·         Interviews with Bill Gates, Steve Jobs, and other tech elites consistently reveal that Silicon Valley parents are strict about technology use.
·         A new book suggests the signs may have been clear years ago that smartphone use should be regulated.
·         There may be a way to integrate tech into the classroom, however, that avoids its harmful effects.


Psychologists are quickly learning how dangerous smartphones can be for teenage brains.
Research has found that an eighth-grader's risk for depression jumps 27% when he or she frequently uses social media. Kids who use their phones for at least three hours a day are much more likely to be suicidal. And recent research has found the teen suicide rate in the US now eclipses the homicide rate, with smartphones as the driving force.
But the writing about smartphone risk may have been on the wall for roughly a decade, according to educators Joe Clement and Matt Miles, coauthors of the recent book " target="_blank"Screen Schooled: Two Veteran Teachers Expose How Technology Overuse is Making Our Kids Dumber."
It should be telling, Clement and Miles argue, that the two biggest tech figures in recent history — Bill Gates and Steve Jobs — seldom let their kids play with the very products they helped create.
"What is it these wealthy tech executives know about their own products that their consumers don't?" the authors wrote. The answer, according to a growing body of evidence, is the addictive power of digital technology.
'We limit how much technology our kids use at home'
In 2007, Gates, the former CEO of Microsoft, implemented a cap on screen time when his daughter started developing an unhealthy attachment to a video game. He also didn't let his kids get cell phones until they turned 14. (Today, the average age for a child getting their first phone is 10.)
Jobs, who was the CEO of Apple until his death in 2012, revealed in a 2011 New York Times interview that he prohibited his kids from using the newly-released iPad. "We limit how much technology our kids use at home," Jobs told reporter
In "Screen Schooled," Clement and Miles make the case that wealthy Silicon Valley parents seem to grasp the addictive powers of smartphones, tablets, and computers more than the general public does — despite the fact that these parents often make a living by creating and investing in that technology.
"It's interesting to think that in a modern public school, where kids are being required to use electronic devices like iPads," the authors wrote, "Steve Jobs's kids would be some of the only kids opted out."
Jobs' children have finished school, so it's impossible to know how the late Apple cofounder would have responded to education technology, or "edtech." But Clement and Miles suggest that if Jobs' kids had attended the average US school today, they'd have used tech in the classroom far more than they did at home while growing up.
That's at the average school at least, according to the coauthors. A number of specialty Silicon Valley schools, such as the Waldorf School, are noticeably low-tech. They use chalkboards and No. 2 pencils. Instead of learning how to code, kids are taught the soft skills of cooperation and respect. At Brightworks School, kids learn creativity by building things and attending classes in treehouses.
Edtech won't be a 'cure all'
If there is any concession Gates has made on technology, it's in the benefits it offers students in certain educational settings. In the years since Gates implemented his household policy, the billionaire philanthropist has taken a keen interest in personalized education, an approach that uses electronic devices to help tailor lesson plans for each student.
In a recent blog post, Gates celebrated Summit Sierra, a Seattle-based school that takes students' personal goals — like getting into a specific college — and devises a path to get there. Teachers in personalized learning settings take on more of a coaching role, helping to nudge students back on track when they get stuck or distracted.
Technology in these cases is being used as specifically as possible — and in ways Gates recognizes as useful for a student's development, not as entertainment.
"Personalized learning won't be a cure-all," he wrote. But Gates said he's "hopeful that this approach could help many more young people make the most of their talents.


[july 2017] how to link adsense to youtube || adsense ko youtube ke sath...

How to activate your AdSense account

Meet AdSense Publisher WikiHow

30/10/2017

The Benghazi stove - one minute survival tip

Why did Germany not invade Sweden in World War 2?


Why did Germany not invade Sweden in World War 2?
HELRAMLI@YAHOO.COM



During the invasion of Scandinavia, Sweden kept neutral, but because much of their income was generated by exporting iron, they continued to sell it to Nazi Germany. Sweden would not help Finland fight off the Soviet attack, but 8,000 Swedes volunteered for the Finnish army. Sensing the impending trouble, nearly everyone in the country pitched in to bolster the Swedish defense lines. The meager Swedish army nearly doubled overnight from volunteers and by war’s end tripled from that. Civilians built shelters, scanned the skies for enemy aircraft, donated time and money and made military vehicles and supplies. Germany told Sweden to stay neutral, but "pro-German," meaning they would have to abide by Germany’s demands. The Swedes would not listen to Germany’s threats and told them if Sweden was invaded they would blow up the iron ore mines. Although Sweden was surrounded by chaotic war, its citizens led relatively normal lives. However, every Swedish family was affected by it because so many civilians were called into the military reserves.
After Germany conquered Denmark and Norway they blockaded Sweden from the outside, forcing Sweden to deal exclusively with Germany. This imposed terrible food and supply shortages, but the resilient Swedes made the best out of a bad situation. They pushed their food production to the limit and used enormous amounts of timber for countless by-products. Censorship was rampant and anti-German and anti-Communist sentiments abounded, which was only compounded when Sweden’s King Gustav V let Germany move their troops across Swedish land. Hitler did not invade Sweden because he did not want to waste valuable troops in Scandinavia when he had other concerns. The Swedes proved their neutrality by not letting Germany use Swedish airspace: when the Germans flew over Sweden to attack Norway, the Swedes fired back with anti-aircraft guns. The Swedish reluctance to bend under German pressure infuriated Hitler, but he had more important things to worry about--the invasion of western Europe.


27/10/2017

BEEDING AND FAT SPOTS Description

BLEEDING AND FAT SPOTS
Description
Definition:
Bleeding of an asphalt mixture (see Figure -1-) occurs when the asphalt cement flows to the top of the mix surface under the action of traffic loading.

Bleeding is often seen as two flushed longitudinal streaks in the wheel paths of the roadway. Fat spots in an asphalt mixture (Figure 19-8) are isolated areas where asphalt cement has come to the surface of the mix during the lay-down and compaction operation or later under traffic. These spots can occur erratically and irregularly, or they may be numerous and in a fairly regular pattern.
Causes
Fat spots are caused primarily by excessive moisture in the mix . The problem is more common with mixtures that contain a high percentage of fine aggregate (over sanded mixes) and those that contain aggregates with a high porosity. If all the moisture in the coarse and fine aggregate is not removed during the drying and mixing operation at the asphalt plant, the moisture vapor will force asphalt cement to the surface of the mix behind the paver as the moisture escapes from the mix and evaporates. Fat spots occur more frequently when aggregate stockpiles are wet or when the moisture content varies in different portions of the stockpiles. Fat spots sometimes occur in areas where petroleum products, such as oil and diesel fuel, were spilled onto the pavement surface prior to overlay (see Figure 19-9; see also Section 14) or have contaminated the mix. In addition, fat spots can be associated with segregated areas in the mix. If the mix deposited on the roadway by the paver is segregated, areas in which excess asphalt cement is present in the mix can result in free binder material on the top of the layer being placed.
The causes of bleeding normally fall into two categories. The first is an excess of fluids in the asphalt mixture—either asphalt cement or moisture or both. Under traffic, the extra moisture and asphalt cement will be pulled to the surface by the passage of vehicle tires. This bleeding phenomenon usually occurs on new mix and during hot weather when the viscosity of the asphalt cement is at its lowest level. Typically the bleeding occurs shortly after traffic is allowed to travel over the fresh mix—while there is still some moisture in the mix
and while the viscosity of the asphalt cement binder is still relatively low.
Bleeding may also be associated with a lack of adequate space in the mix for the asphalt cement. If the VMA content and air void content of the mix do not provide enough room for the binder material, bleeding can occur as the mix is densified by traffic, both shortly after construction and later. The traffic compaction process will decrease the air void content of the mix and may, in turn, squeeze some of the asphalt cement out of the mix. The “extra” asphalt will appear as a longitudinal streak or fat spot throughout the length of each wheelpath.
One additional possible cause of bleeding is the condition of the pavement layer on which the new mix is placed. If the underlying layer has excess asphalt on its surface or excess crack seal material in the cracks and joints, some of this material may be drawn up through a thin new mix layer. Further, if too much tack coat is applied to the original pavement layer, the excess material may be pulled up through a thin overlay and contribute to the bleeding problem.
Solutions
Variations in the asphalt mix temperature behind the paver indicate that the moisture content of the mix may also be variable. Where moisture has evaporated, the temperature is lower. This latter phenomenon can contribute to both the bleeding of the mix later under traffic and the generation of fat spots in the mix during construction. It is important, therefore, that the aggregate used in the mix be relatively dry and that the moisture content of the mix upon discharge from the asphalt plant be as low as possible, but not more than 0.5 percent. Extra care needs to be taken in drying when producing mixtures that incorporate highly absorptive aggregate.
Bleeding problems caused by excess asphalt cement in the mix can most easily be solved by reducing the asphalt content, consistent with other properties of the mix, such as air voids, VMA, and strength or stability. Bleeding problems that occur in conjunction with pavement rutting usually can be solved, however, only by a complete redesign of the asphalt mixture, with emphasis on proper air void content and VMA criteria.
Effects on Performance
Occasional fat spots in the mix should not affect the ultimate durability of the pavement to a significant degree. A large number of fat spots or bleeding in the wheelpaths does affect pavement performance, however, because of variable asphalt and air void content in different parts of

the mix. In addition, other mix problems, such as shoving, rutting, and loss of skid resistance, may occur in a mix that contains many fat areas or bleeding in the wheel-paths. The design of the asphalt mixture, the operation of the asphalt plant (more complete removal of moisture), or both should be checked to ensure that the mix produced will provide adequate pavement performance under vehicular loading.

23/10/2017

Aficionado: Old is indeed gold: Rare Old newspaper articles.

Aficionado: Old is indeed gold: Rare Old newspaper articles.: “I wish I could turn back time” That is a common thought which results out of our cogitation on certain events. If we take our thought li...