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Articles by Daniel P. Duffy
The Perfect Pipe
PHOTOS: CORE & MAINGiven the wide variety of pipe materials available, how do engineers and contractors select the right one for their diverse project applications? What are the best materials for different systems, for various soil types, and for different pressure levels?
Control with Finesse
ALL IMAGES: GETTY IMAGES/ISTOCKPHOTO A portion of an ancient nilometer, Antique illustration of a water pump, and A manual water control valveThe advantages of using high-tech digital controls over low-tech manual controls seem obvious. But there is a reason why critical infrastructure, especially water management systems, has adopted digital operations over the past few decades. And this process bears examination.
Saving Time and Money
Credit: Terex Bid-Well Terex Bid-Well’s 4800 Concrete PaverThe dictionary defines “recycling” as: “to treat or process (used or waste materials) so as to make suitable for reuse.” When the general public thinks of recycling, it is typically in terms of waste materials from household and commercial waste that are extracted, separated, processed, packaged, and resold as raw materials (ferrous and non-ferrous metals, office paper, cardboard, newsprint, glass of various colors, and different...
A Wall of Sound - Forester Network
Credit: iStock/allanswartFor those of us who are old enough to remember the early days of rock-and-roll, there was an audio technique and music production formula used to make the big hits of the era—the “wall of sound.” The idea was to channel the various frequencies and volumes of the various voice and instrument tracks to make for a more impressive musical experience.
Upon Closer Examination
Never has it been more important to inspect and maintain hydraulic infrastructure. Never has it been harder in both remote rural areas and crowded urban environments to do so. Direct inspection of pipes and sewers is essentially impossible given the small diameter sizes of the pipes in question. Yet aging infrastructure is more prone than ever to damage and in need of repair.
Pump Maintenance 101
Maintenance will never be exciting. But it’s necessary work required to ensure that a pumping system operates when you need it. If pump operation was a football team, maintenance would be the offensive linemen who do the grunt work in the trenches of the scrimmage line and make possible the exciting plays and athletic prowess that make the quarterback so famous.
Aquarius 2: Poor weather hampers rescue
A rescue ship carrying 58 migrants remains stranded at sea as poor weather hampers a rescue operation off the coast of Malta.That's according to SOS Mediterranee at a press conference.The Aquarius 2 was still a few miles off the Maltese coast.It's after a deal was struck among five European countries to reallocate the rescued people but then became stuck on a private rescue ship because it couldn't find a country which would let it dock.Claudia Lodesani, President of Medecins Sans Frontieres...
The Ryder Cup: How does it work?
Every two years one of the world's most fascinating and thrilling sporting events takes place — The Ryder Cup.Twelve of the finest golfers from Europe and the United States go head to head in the hope they can bring the famous trophy home.
Intelligent Water Management
There is an old saying, “If you’re so smart, why aren’t you rich?” Smart management of a water supply can greatly reduce operating costs and stretch municipality operating budgets, while providing superior service. The keys to being smart, the brains of the operation, are Automatic Meter Reading (AMR) technologies and Advanced Metering Infrastructure (AMI) systems. AMR is the basis of this operation.
Time-elapse shows artist sketching Lambeau out of names of Packers players
Philadelphia artist Daniel Duffy sketches a portrait of Lambeau Field using the names of every Packers player ever. Daniel Duffy, ArtOfWords.com
Power Testing - Forester Network
The latest in loadbank technology and applications “Be prepared.” For critical facilities threatened with the possibility of a power cut-off or a community that could face a blackout, the best form of preparation is a backup genset, generator, turbine, or battery. But what about the backup preparation itself? How does an operator know that the backup will be ready when the time comes? Backup power sources tend to sit unused for long periods of time.
How to be Defense-minded With Trenching and Shoring Projects
How to be Defense-minded With Trenching and Shoring Projects Trenching operations are never “ordinary.” Accidents are never expected. But they can be anticipated and prevented. To be forewarned is to be forearmed. Geotechnical investigation of the soil to be excavated during the trenching operation provides the first warnings that there could be a problem with trench stability. Engineering analysis is the best defense against disaster once potential problems are uncovered.
Form and Function
“Form follows function” is a basic rule of architecture, engineering, and industrial design. Transfer trailers serve a specific function. Their large hauling capacities make it financially feasible to transport large quantities of waste over long distances. This allows for the construction and operation of larger, regional landfills replacing dozens of smaller landfills.
Code for Miami - Open Collective
We recently started Open Miami as a way to organize additional programs bridging technology and civic engagement in Miami. You can contribute to the Open Miami Collective directly; contributions here will specifically go to projects and events related to Code for Miami. In a perfect world: someone who can run our programs full time. Until then: money for hack night pizzas and hosting. Supplies for events.
Liverpool request meeting with Italian police ahead of Champions League semi-final clash with Roma
Liverpool Football Club has requested a meeting with Italian police ahead of the club's Champions League semi-final second leg against Roma on Wednesday. The Merseyside club is frustrated by the lack of essential information surrounding the tie. The Club has offered to pay for a secure shuttle service for its supporters to and from the stadium. The first leg at Anfield was marred by pre-match violence which left one Liverpool fan in a critical condition in hospital.
Shields Up! - Forester Network
Being defensive-minded with trenching and shoring projects Trenching operations are never “ordinary.” Accidents are never expected. But they can be anticipated and prevented. To be forewarned is to be forearmed. Geotechnical investigation of the soil to be excavated during the trenching operation provides the first warnings that there could be a problem with trench stability. Engineering analysis is the best defense against disaster once potential problems are uncovered.
Steam and Power - Forester Network
Boilers have been at the heart of the industrial revolution since the invention of the steam engine by James Watt back in the 18th century. Essentially like a giant tea kettle, they are vessels in which water is heated, flashed to steam, and then extracted to perform useful work.
Smooth Rides - Forester Network
The effects the specialized nature of collection vehicles has on tires, brakes, and suspensions A waste collection truck, like any other heavy-duty truck or vehicle, rides on three things: tires, brakes, and the suspension. Given the specialized nature of waste collection operations, as opposed to long-haul trucking, the types of tires, brakes, and suspensions used by waste collection trucks can have a significant effect on their overall efficiency and cost-effectiveness.
Water Storage Systems
In the age of climate change, droughts, and wildfires, water storage systems are more important than ever. There is only one readily available, accessible, and inexpensive substance that can be widely used to combat fires: water. However, in a changed climate where drought and forest fires are far more prevalent, and where commercial and residential development in vulnerable areas makes for ever more expensive property damage, available water supplies can be severely strained.
Uninterruptible Power Supplies and Distributed Energy Systems
An uninterruptible power supply (UPS) is defined as, “A device that provides battery backup when the electrical power fails or drops to an unacceptable voltage level. Small UPS systems provide power for a few minutes, enough to power down the computer in an orderly manner, while larger systems have enough battery for several hours.” (Source: PC Magazine Encyclopedia.) This is the classic definition as applied to the protection of individual computers and other relatively small load demands.
Protection Means More than Safety
Insurance policies and the best safety practices for dirt movers We are all familiar with the standard physical protection provided to contractors and their workers.
Exploring Subsurface Detection Technologies and Methods
Many popular sayings are polar opposites of each other. “Look before you leap” is the exact opposite of “He who hesitates is lost.” However, a successful earthwork contractor must do both simultaneously. They must avoid the hidden dangers that can lurk below ground at any job site. They must also perform his work in an expeditious manner at maximum efficiency in order to get the job done in the first place and then show a profit.
Protecting Storm Drains and Inlets From Sediment and Pollutants
The trouble with stormwater runoff is that it travels along the ground surface and over pavement, picking up sediment and other contaminants as it goes. A well-designed surface water runoff collection and drainage system will funnel runoff from relatively large areas into individual collection points such as inlets and drains that direct the concentrated flows into transit structures such as storm sewers or underground storage tanks.
Same Goals, New Methods
Challenges posed to the recycling industry by automation, technology, and politics There used to be a job called an “elevator operator.” For those of us old enough to remember, the elevator operator was a man (usually wearing a sharp uniform like a fancy hotel concierge or doorman) who sat in an elevator car for his entire shift and manually operated the lift so that you would arrive safely and smoothly at your destination floor.
Beyond Tanks - Forester Network
It would be wrong to assume that a water storage system was just a static collection of tanks, ponds, or cisterns without moving parts. Though the physical structure of a water storage tank is dominated by both the containment walls of the tank and its foundation/structural members, it could not function without a series of mechanical systems that monitor and operate the tank’s filling and discharge functions.
Interception and Filtration
The trouble with stormwater runoff is that it travels along the ground surface and over pavement, picking up sediment and other contaminants as it goes. A well-designed surface water runoff collection and drainage system will funnel runoff from relatively large areas into individual collection points such as inlets and drains that direct the concentrated flows into transit structures such as storm sewers or underground storage tanks.
Use and Chemical Composition of Turbine Lubricants
Use and Chemical Composition of Turbine Lubricants Lubricants are materials that reduce friction by increasing the smoothness of moving surfaces in contact. All solids have surfaces with imperfections and roughness. These irregularities lead to increased friction and associated heat generation. By covering these imperfections in a viscous material or slippery liquid, friction is reduced and the moving system’s components are kept cool.
Successful Water Leak Detection and Audit Methods
Every drop of clean water is precious. Unfortunately, 30–50% of water is lost through aging infrastructure. And lost water equals lost revenue to the water service supplier. Water is lost through leaks and cracks in pipes and their fittings.
Successful Water Leak Detection and Audit Methods
Every drop of clean water is precious. Unfortunately, 30–50% of water is lost through aging infrastructure. And lost water equals lost revenue to the water service supplier. Water is lost through leaks and cracks in pipes and their fittings.
Testing the Limits
There is a problem with having backup generators. The problem is that the operator may not know if the generator is capable of meeting necessary power demands in an emergency situation. What is needed is a device that allows for the testing of a simulated electrical load. Load banks are just the right devices. A load bank is a self-contained testing unit that includes both electrical load elements and operational controls and auxiliary devices necessary for operation.
Smooth Operator - Forester Network
THE OPERATIONAL USES AND CHEMICAL COMPOSITION OF TURBINE LUBRICANTS Lubricants are materials that reduce friction by increasing the smoothness of moving surfaces in contact. All solids have surfaces with imperfections and roughness. These irregularities lead to increased friction and associated heat generation. By covering these imperfections in a viscous material or slippery liquid, friction is reduced and the moving system’s components are kept cool.
Keep on Trucking
New types of tire wash systems and why they’re necessary on many job sites Wheel wash systems are often one of the least recognized landfill structures for ensuring safety, health, and environmental protection. But they are far from being the least important—not that any landfill protective system is unimportant. For a minor capital investment and minimal operating costs, landfill owners and operators can achieve high standards of site cleanliness and public acceptance.
Continuous Improvement
The ongoing efforts to improve methods, techniques, products, and services when it comes to residential collection Waste collection does not stay constant. Like any other industry, it changes and grows with each new innovation in machinery or technique. Other industries consciously adopt the formal process of “continuous improvement” to advance their capabilities and improve the quality of their products and services. Waste collection is no different.
Measuring Earthwork Volumes
Formulas and methods for determining the volumes and areas of regular shapes and surfaces go back at least as far as ancient Greece. Pythagoras and other mathematicians determined the formulas that are still used to calculate the volumes of spheres and pyramids, as well as the areas of curve conic sections. But what was a matter of mystic philosophy to the Greeks is a matter of financial life or death for earthwork contractors. This is not an overstatement.
New York Yankees' Masahiro Tanaka Utterly Dominates Jays In Win
Masahiro Tanaka made his final tuneup before the postseason and he showed the New York Yankees he’s ready for it, as he registered a new career-high in strikeouts in a shutout win over the Toronto Blue Jays. The 28-year-old has a solid mix of his splitter and slider working on Friday afternoon and punched out 15 over seven innings of work while holding the Jays to just three hits.
Final Yankees Series Has Immense Importance Beyond An AL East Title
The regular season is winding down and this year already has a far better outcome than last year. The New York Yankees have, at least, punched a ticket to the postseason, with the chance to potentially steal the American League East. While those chances are incredibly slim, the Yankees have all the pieces to make that happen. The Boston Red Sox have to take on the Houston Astros. The Yankees are coming in hot. It all has to go just as planned.
The Los Angeles Clippers Controversy: How Far Can They Go?
As did others, Chris Paul left his long time team to join a fellow star in hopes of finally winning a championship. Then poof, just like that, all of a sudden the Clippers cannot be a successful basketball club. That’s the general consensus among many in the league, and I find it way off base. A look at the new Los Angeles Clippers, what they can do, and just how far they will go.
Five Keys To Victory For The New York Giants vs. Tampa Bay Buccaneers
A loss would be devastating to the New York Giants’ hopes of reaching the playoffs, as they would not only drop them to 0-4 but it would be their fourth loss within the conference. Despite the slow start, head coach Ben McAdoo is confident that his team can turn things around and begin playing to their potential. With that being said, here are five keys to victory for the Giants against the Buccaneers. The Giants have turned the ball over at least once in each of their three games this season.
New York Yankees: Aaron Judge Makes Case for Next Jets QB (Video)
We’ve watched with pure fascination as Aaron Judge has crushed 51 home runs in his rookie season. We’ve seen amazing things on the baseball field from the New York Yankees rookie phenom. But he was a multi-sport athlete. And that kind of talent never dies, no matter how much focus he put on the sport of baseball. Today, Aaron Judge showed off some football skills on camera, tossing a pass to reporter Bryan Hoch while he was on commercial break with the MLB Network.
Tampa Bay Rays @ New York Yankees, 9/28/17: Lineups & Full Preview
The New York Yankees are looking to build on their 49-28 home record, as they go for the sweep of the three-game sweep of the Tampa Bay Rays at Yankee Stadium on Thursday night. Sonny Gray will get the starting nod for New York in what will be his 11th start as a Yankee and 27th start of the season. Last time out, the 27-year-old earned his 10th win of the season at Toronto after allowing just one earned run over six innings pitched.
New York Knicks News Mix, 9/28/17: Carmelo Anthony Believed Rockets Deal Was Done
Carmelo Anthony always planned to go to the Houston Rockets. For months he dug in his heels hoping the New York Knicks could work something out. There was even a point this summer when he thought he’d be going there. Frank Isola of The New York Daily News reports that Anthony told Sirius XM Radio he once thought a “deal was done with Houston”. Anthony thought it would go through in early July.
New York Rangers Cut Seven Players Including Lias Andersson
The New York Rangers announced some tough roster decisions via their official Twitter account on Thursday. The Rangers cut seven players today. Ryan Graves, Vin Lettieri, and Neal Pionk were all assigned to Hartford (AHL). Matt Puemple will be placed on waivers today and Bobby Farnham was released from his Professional Tryout contract. First-round pick Lias Andersson was sent back to Frolunda of the Swedish Hockey League.
Yankee Stadium By Daniel Duffy and His Art of Words
With an unbelievable ability to combine passion for art and sports, Daniel Duffy uses words to create works of art that are both captivating visually and take you on a trip down memory lane. There are not too many people in the world that can combine their love of sports with a God-given artistic ability and turn it into a life-long occupation. Daniel Duffy, however, is one of those people.
Rookies, Castoffs and Returnees Help New York Jets Dominate Miami Dolphins
After watching their run defense and, for that matter, their defense overall be publically mocked the first two weeks of the season, the New York Jets finally took all the insults being thrown at them personally. Vegas had the Miami Dolphins as six-point favorites on the road against a division rival. In a series that usually always produces the unexpected, the current Jets squad had to be a bit humiliated.
New York Islanders Submit "Comprehensive Proposal" to Develop at Belmont (Report)
On the eve of the deadline, just hours before the window closes at 2 p.m. ET, the New York Islanders formally submitted a bid to develop an arena and more at Belmont Park. Jim Baumbach of Newsday broke the news on Twitter: The Islanders bid comes amidst the announcement of another New York team that plans to formally submit a bid: MLS’ New York City FC.
Great Things Come in Small Packages
The famous saying “smaller is better” is not necessarily true. A more accurate statement would be that “appropriate scale is better.” This brings us to the use of microturbines and their appropriate applications. Micro turbines are not actually tiny; they are still relatively large and powerful machines. But compared to industrial and commercial scale turbines they are small, compact, and very useful for confined space applications.
LIQUOR ESTABLISHMENTS AND MINIMUM DISTANCE REQUIREMENTS
You asked for the law in Connecticut and for a survey of other state laws concerned with setting a minimum distance between liquor selling establishments and places providing services to children and families. Connecticut does not have a state law setting a minimum distance between a liquor establishment and places such as schools or churches.
Estimating Earthwork Volumes
Formulas and methods for determining the volumes and areas of regular shapes and surfaces go back at least as far as ancient Greece. Pythagoras and other mathematicians determined those formulas that are still used to calculate the volumes of spheres and pyramids, as well as the areas of curve conic sections. But what was a matter of mystic philosophy to the Greeks is a matter of financial life or death for earthwork contractors. This is not an overstatement.
Measuring Earthwork Volumes
Formulas and methods for determining the volumes and areas of regular shapes and surfaces go back at least as far as ancient Greece. Pythagoras and other mathematicians determined those formulas that are still used to calculate the volumes of spheres and pyramids, as well as the areas of curve conic sections. But what was a matter of mystic philosophy to the Greeks is a matter of financial life or death for earthwork contractors. This is not an overstatement.
Pump System Longevity and Extreme Operating Regimes
A pump is a mechanism that utilizes mechanical force to overcome distance, elevation, and friction to move water or another liquid through a conduit to a point where it can be discharged, stored, or utilized. Like all mechanical devices, pumps can wear out or break over time. A pump’s operational lifetime and longevity of service is in direct proportion to the resistance it has to overcome while it is working. The greater the resistance, the greater the wear and tear on the pump.
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