COMPUTER SIMULATION

January 20, 2019


More and more engineers, systems analysist, biochemists, city planners, medical practitioners, individuals in entertainment fields are moving towards computer simulation.  Let’s take a quick look at simulation then we will discover several examples of how very powerful this technology can be.

WHAT IS COMPUTER SIMULATION?

Simulation modelling is an excellent tool for analyzing and optimizing dynamic processes. Specifically, when mathematical optimization of complex systems becomes infeasible, and when conducting experiments within real systems is too expensive, time consuming, or dangerous, simulation becomes a powerful tool. The aim of simulation is to support objective decision making by means of dynamic analysis, to enable managers to safely plan their operations, and to save costs.

A computer simulation or a computer model is a computer program that attempts to simulate an abstract model of a particular system. … Computer simulations build on and are useful adjuncts to purely mathematical models in science, technology and entertainment.

Computer simulations have become a useful part of mathematical modelling of many natural systems in physics, chemistry and biology, human systems in economics, psychology, and social science and in the process of engineering new technology, to gain insight into the operation of those systems. They are also widely used in the entertainment fields.

Traditionally, the formal modeling of systems has been possible using mathematical models, which attempts to find analytical solutions to problems enabling the prediction of behavior of the system from a set of parameters and initial conditions.  The word prediction is a very important word in the overall process. One very critical part of the predictive process is designating the parameters properly.  Not only the upper and lower specifications but parameters that define intermediate processes.

The reliability and the trust people put in computer simulations depends on the validity of the simulation model.  The degree of trust is directly related to the software itself and the reputation of the company producing the software. There will considerably more in this course regarding vendors providing software to companies wishing to simulate processes and solve complex problems.

Computer simulations find use in the study of dynamic behavior in an environment that may be difficult or dangerous to implement in real life. Say, a nuclear blast may be represented with a mathematical model that takes into consideration various elements such as velocity, heat and radioactive emissions. Additionally, one may implement changes to the equation by changing certain other variables, like the amount of fissionable material used in the blast.  Another application involves predictive efforts relative to weather systems.  Mathematics involving these determinations are significantly complex and usually involve a branch of math called “chaos theory”.

Simulations largely help in determining behaviors when individual components of a system are altered. Simulations can also be used in engineering to determine potential effects, such as that of river systems for the construction of dams.  Some companies call these behaviors “what-if” scenarios because they allow the engineer or scientist to apply differing parameters to discern cause-effect interaction.

One great advantage a computer simulation has over a mathematical model is allowing a visual representation of events and time line. You can actually see the action and chain of events with simulation and investigate the parameters for acceptance.  You can examine the limits of acceptability using simulation.   All components and assemblies have upper and lower specification limits a and must perform within those limits.

Computer simulation is the discipline of designing a model of an actual or theoretical physical system, executing the model on a digital computer, and analyzing the execution output. Simulation embodies the principle of “learning by doing” — to learn about the system we must first build a model of some sort and then operate the model. The use of simulation is an activity that is as natural as a child who role plays. Children understand the world around them by simulating (with toys and figurines) most of their interactions with other people, animals and objects. As adults, we lose some of this childlike behavior but recapture it later on through computer simulation. To understand reality and all of its complexity, we must build artificial objects and dynamically act out roles with them. Computer simulation is the electronic equivalent of this type of role playing and it serves to drive synthetic environments and virtual worlds. Within the overall task of simulation, there are three primary sub-fields: model design, model execution and model analysis.

REAL-WORLD SIMULATION:

The following examples are taken from computer screen representing real-world situations and/or problems that need solutions.  As mentioned earlier, “what-ifs” may be realized by animating the computer model providing cause-effect and responses to desired inputs. Let’s take a look.

A great host of mechanical and structural problems may be solved by using computer simulation. The example above shows how the diameter of two matching holes may be affected by applying heat to the bracket

 

The Newtonian and non-Newtonian flow of fluids, i.e. liquids and gases, has always been a subject of concern within piping systems.  Flow related to pressure and temperature may be approximated by simulation.

 

The Newtonian and non-Newtonian flow of fluids, i.e. liquids and gases, has always been a subject of concern within piping systems.  Flow related to pressure and temperature may be approximated by simulation.

Electromagnetics is an extremely complex field. The digital above strives to show how a magnetic field reacts to applied voltage.

Chemical engineers are very concerned with reaction time when chemicals are mixed.  One example might be the ignition time when an oxidizer comes in contact with fuel.

Acoustics or how sound propagates through a physical device or structure.

The transfer of heat from a colder surface to a warmer surface has always come into question. Simulation programs are extremely valuable in visualizing this transfer.

 

Equation-based modeling can be simulated showing how a structure, in this case a metal plate, can be affected when forces are applied.

In addition to computer simulation, we have AR or augmented reality and VR virtual reality.  Those subjects are fascinating but will require another post for another day.  Hope you enjoy this one.

 

 

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WEARABLE TECHNOLOGY

January 12, 2019


Wearable technology’s evolution is not about the gadget on the wrist or the arm but what is done with the data these devices collect, say most computational biologist. I think before we go on, let’s define wearable technology as:

“Wearable technology (also called wearable gadgets) is a category of technology devices that can be worn by a consumer and often include tracking information related to health and fitness. Other wearable tech gadgets include devices that have small motion sensors to take photos and sync with your mobile devices.”

Several examples of wearable technology may be seen by the following digital photographs.

You can all recognize the “watches” shown above. I have one on right now.  For Christmas this year, my wife gave me a Fitbit Charge 3.  I can monitor: 1.) Number of steps per day, 2.) Pulse rate, 3.) Calories burned during the day, 4.) Time of day, 5.) Number of stairs climbed per day, 6.) Miles walked or run per day, and 7.) Several items I can program in from the app on my digital phone.  It is truly a marvelous device.

Other wearables provide very different information and accomplish data of much greater import.

The device above is manufactured by a company called Lumus.  This company focusses on products that provide new dimensions for the human visual experience. It offers cutting-edge eyewear displays that can be used in various applications including gaming, movie watching, text reading, web browsing, and interaction with the interface of wearable computers. Lumus does not aim to produce self-branded products. Instead, the company wants to work with various original equipment manufacturers (OEMs) to enable the wider use of its technologies.  This is truly ground-breaking technology being used today on a limited basis.

Wearable technology is aiding individuals of decreasing eyesight to see as most people see.  The methodology is explained with the following digital.

Glucose levels may be monitored by the device shown above. No longer is it necessary to prick your finger to draw a small droplet of blood to determine glucose levels.  The device below can do that on a continuous basis and without a cumbersome test device.

There are many over the world suffering from “A-fib”.  Periodic monitoring becomes a necessity and one of the best methods of accomplishing that is shown by the devices below. A watch monitors pulse rate and sends that information via blue tooth to an app downloaded on your cell phone.

Four Benefits of Wearable Health Technology are as follows:

  • Real Time Data collection. Wearables can already collect an array of data like activity levels, sleep and heart rate, among others. …
  • Continuous Monitoring. …
  • Predict and alerting. …
  • Empowering patients.

Major advances in sensor and micro-electromechanical systems (MEMS) technologies are allowing much more accurate measurements and facilitating believable data that can be used to track movements and health conditions on any one given day.  In many cases, the data captured can be downloaded into a computer and transmitted to a medical practitioner for documentation.

Sensor miniaturization is a key driver for space-constrained wearable design.  Motion sensors are now available in tiny packages measuring 2 x 2 millimeters.  As mentioned, specific medical sensors can be used to track 1.) Heart rate variability, 2.) Oxygen levels, 3.) Cardiac health, 4.) Blood pressure, 5.) Hemoglobin, 6.) Glucose levels and 7.) Body temperature.  These medical devices represent a growing market due to their higher accuracy and greater performance.  These facts make them less prone to price pressures that designers commonly face with designing consumer wearables.

One great advantage for these devices now is the ability to hold a charge for a much longer period of time.  My Fitbit has a battery life of seven (7) days.  That’s really unheard of relative to times past.

CONCLUSION:  Wearable designs are building a whole new industry one gadget at a time.  MEMS sensors represent an intrinsic part of this design movement. Wearable designs have come a long way from counting steps in fitness trackers, and they are already applying machine-learning algorithms to classify and analyze data.


My posts are not necessarily aimed to provide public service announcements but I just could not pass this one up.  Take a look.

On November first of 2018, Honeywell released a study founding that forty-four percent (44%) of the USB drives scanned by their software at fifty (50) customer locations contained at least one unsecured file.  In twenty-six percent (26%) of those cases, the detected fire was capable of causing what company officials called “a serious disruption by causing individuals to lose visibility or control of their operations”.  Honeywell began talking up its SMX (Secure Media Exchange) technology at its North American user group meeting in 2016, when removable media like flash drives were already a top pathway for attackers to gain access to a network. SMX, launched officially in 2018  is designed to manage USB security by giving users a place to plug in and check devices for approved use. The SMX Intelligence Gateway is used to analyze files in conjunction with the Advanced Threat Intelligence Exchange ( Exchange (ATIX), Honeywell’s threat intelligence cloud. Not only has SMX made USB use safer, but Honeywell has gained access to a significant amount of information about the methodology of attacks being attempted through these devices.

“The data showed much more serious threats than we expected,” said Eric Knapp, director of strategic innovation for Honeywell Industrial Cyber Security. “And taken together, the results indicate that a number of these threats were targeted and intentional.” Though Honeywell has long suspected the very real USB threats for industrial operators, the data confirmed a surprising scope and severity of threats, Knapp said, adding. “Many of which can lead to serious and dangerous situations at sites that handle industrial processes.”

The threats targeted a range of industrial sites, including refineries, chemical plants and pulp and paper facilities around the world. About one in six of the threats specifically targeted industrial control systems (ICSs) or Internet of Things (IoT) devices. (DEFINITION OF IoT: The Internet of Things (IoT) refers to the use of intelligently connected devices and systems to leverage data gathered by embedded sensors and actuators in machines and other physical objects. In other words, the IoT (Internet of Things) can be called to any of the physical objects connected with network.)

Among the threats detected, fifteen percent (15%) were high-profile, well-known issues such as Triton, Mirai and WannaCry, as well as variants of Stuxnet. Though these threats have been known to be in the wild, what the Honeywell Industry Cyber Security team considered worrisome was the fact that these threats were trying to get into industrial control facilities through removable storage devices in a relatively high density.

“That high-potency threats were at all prevalent on USB drives bound for industrial control facility use is the first concern. As ICS security experts are well aware, it only takes one instance of malware bypassing security defenses to rapidly execute a successful, widespread attack,” Honeywell’s report noted. “Second, the findings also confirm that such threats do exist in the wild, as the high-potency malware was detected among day-to-day routine traffic, not pure research labs or test environments. Finally, as historical trends have shown, newly emerging threat techniques such as Triton, which target safety instrumented systems, can provoke copycat attackers. Although more difficult and sophisticated to accomplish, such newer threat approaches can indicate the beginnings of a new wave of derivative or copycat attacks.”

In comparative tests, up to eleven percent (11%) of the threats discovered were not reliably detected by more traditional anti-malware technology. Although the type and behavior of the malware detected varied considerably, trojans—which can be spread very effectively through USB devices—accounted for fifty-five percent (55%) of the malicious files. Other malware types discovered included bots (eleven percent), hack-tools (six percent) and potentially unwanted applications (five percent).

“Customers already know these threats exist, but many believe they aren’t the targets of these high-profile attacks,” Knapp said. “This data shows otherwise and underscores the need for advanced systems to detect these threats.”

CONCLUSION:  Some companies and organizations have outlawed USB drives entirely for obvious reasons.  Also, there is some indication that companies, generally off-shore, have purposely embedded malware within USB drives to access information on a random level.  It becomes imperative that we take great care in choosing vendors providing USB drives and other external means of capturing data.  You can never be too safe.

DECISION PARALYSIS

January 5, 2019


The idea for this post came from “Plant Engineering Magazine”, December 2018.

OK, now what do I do?  Have you ever heard yourself muttering those words?  Well, I’ve been there—done that—got the “Tee shirt”.  We all have at one time been placed or have placed ourselves in the decision-making process with a certain degree of paralysis.  If you have P and L responsibilities, own a house, contemplate the purchase of any item that will impact your checkbook or finances, you’ve been there. Let’s take a look at eight (8) factors that may cause decision paralysis.

  1. RAPID CHANGE: The manner in which we conduct our daily lives has changed dramatically over the past few years. Digitalization is sweeping across the domestic and commercial world changing the way we do just about everything. The way we shop, bank, and travel can be accomplished on-line with delivery systems reacting accordingly.  Everyone, including the
    “ baby-boomers” need to get on-board with the changes.
  2. COMPLEX PROCESSES: Old-school processes are inadequate for managing today’s very complex issues. Our three sons and all of our grandchildren have probably never purchased a stamp.  Everything is accomplished on line including paying the bills.  There will come a time when every acquisition will start online.  One of the most fascinating web sites if U-tube.com.  I have never been faced with a “fix-it” problem that is not described on U-tube. It is a valuable resource.  Get ready for digitization now—its coming.
  3. DEMANDING CUSTOMERS: Today’s consumers have high expectations for attentive service, high value, and timely communication. It is no longer enough to be content with trusting the process will deliver value for the customer.  My greatest complaint with COMCAST is customer service.  The product itself is adequate but their customer service is one of the most pitiful on the planet.
  4. PHYSICAL THREATS: I do NOT mean burglars and home invasion.  Aging infrastructure systems, including our power grid, air traffic control, bridges, railways, pose significant threats to reliable communication, transportation and safety in general.  In-house and in-store equipment may not be sophisticated enough to handle growing demands brought on by our “digital world”.  Upgrades to physical equipment and programs driving that equipment become more frequent as we try to make decisions and choices.
  5. TOO MANY CHOICES: While choices are really nice, too many options can present a real burden for the decision maker.  We should and must prioritize the growing list of choices and choose the most viable options.  This includes possible vendors and companies offering choices.
  6. CYBER THREATS: We MUST incorporate systems to protect digital infrastructure.   If you read the literature, you find we are losing that battle. It’s almost to the point that every household needs an IT guy.
  7. DATA OVERLOAD: “Big data” is swamping us with information at an ever-growing rate due to an endless list of features and functionality relative to digital devices. As you well know, CDs and DVDs can now be purchased with terabyte capabilities.  Necessity is the mother of invention and this need will only grow.
  8. TIGHT BUDGETS AND FINANCES: In most cases, making the proper and correct decision will require some cost. Once again, this can cause delays in trying to choose the best options with the maximum payback in time, money and effort.

There may be others factors depending upon the situation or the decision you must make on a personal basis.    Let us now consider steps that just might ease the pain of decision-making.

  • EARLY DETECTION OF A PROBLEM: There probably are early warning signs that a problem is coming necessitating a solution. It is a great help if you can stay attuned to warnings that present themselves.  It gives you time to consider a possible solution.
  • SCHEDULE AND CONSIDER YOUR “FIX” EARLY: If at all possible, solve the problem before it becomes a panic situation. Have a solution or solutions ready to incorporate by becoming pro-active.
  • MONITOR THE FIX: Make sure you are solving the problem and not a manifestation of the problem.  We call this “root-cause-analysis”.
  • TRACK YOUR COSTS: Know what it costs to resolve the problem.
  • MAINTAIN RECORDS AND CREATE A PAPER TRAIL: Some times the only way you know where you are is to look back to see where you have been!

THE MOST UNRELIABLE

November 7, 2018


One of the things I like to do with my posts is deliver information you can use in your daily life. “Stuff” that just mike make a difference.  I certainly hope this one does.    Some of the information you will read is taken from Consumer Reports Magazine and Design News Daily Magazine.

Consumer Reports recently published information regarding the reliability of automobiles offered for sale in the United States.  They drew their conclusions from owner surveys of more than five hundred thousand (500,000) people. The surveys look at numerous problem areas including engine, transmission, suspension, cooling, electrical, climate, brakes, exhaust, paint, trim, noises, leaks, power equipment, and in-car electronics, among others.  We will highlight now those automobiles considered to be the most unreliable.  This list may surprise you as it did me.

I would say that if you are looking for new wheels you heed the information given by Consumer Magazine.  They accept no advertisements and generally conduct their research by interviewing consumers and actually testing the products they report on.


Some information for this post is taken from the Concord Coalition

Business, corporate, government or individual fiscal year calendars and planners for the US fiscal year 2018 as defined by the US Federal Government, starting on October 1, 2017 and ending on September 30, 2018. The calendars cover a twelve-month period and are divided into four quarters. With that being the case, once again the clock begins ticking elevating our national debt.  As of 2 October 2018, at 0900 hours our national debt was about $21.5 trillion dollars.

As you can see, a trillion is a one with twelve (12) zeros behind it.  We have twenty-one of these to deal with.  The chart below was “shot” at sixteen (16) hundred hours (4:00 for you civilians) on 2 October 2018.  If that debt is allocated for each citizen and each taxpayer, the debt becomes $65,447 or $176,475 respectively. We all had better have a really really good year.

Right now, our debt is approximately ninety-four percent (%) of our gross domestic product (GDP).  In 2050 that debt is estimated to be one hundred and fifty percent (150%) our GDP, which is considered to be unsustainable.   The chart below will give you some idea as to how quickly our debt has risen.

Well, if misery loves company, we are not alone with issues of national debt.  The following chart give debt of the top twenty (20) countries with significant debt.  Not a pretty picture.

WHAT IS THE CURE FOR US NATIONAL DEBT?

Entitlement Programs – When social security was first enacted the life expectancy in the country was sixty-three (63) years old.  Today that life expectancy is in the late seventies (70’s).  If we’re to get our entitlement programs back into line, we should think about changing the eligibility age for social security and Medicare to at least the early seventies (70’s).

We should also change social security disability and loosen the eligibility for those who are over sixty-two (62) years old.  Those who can’t continue to do hard labor (construction) type of jobs would be eligible to collect earlier.  We would also have to make sure that medical insurance companies use community rating so those older Americans could get medical insurance at a “reasonable” price until they reached the age of eligibility for Medicare.

The Military – It makes no sense that the United States should spend more than the next ten countries combined for national defense.  We have significantly more firepower than we need and as a result we tend to trot this ability out to other parts of the world and work towards “nation building”.  It’s time that we go back to the levels of military spending we had under previous administrations and even make larger cuts.  We just can’t afford the size military we have and the interventionists policies that we’ve developed.  We really cannot protect the entire world endlessly.

Tax policy – It’s not only the rich.  We do need to change tax policy on the richest Americans.  They do need to pay more, but so does everyone else.  Right now, we have close to fifty percent (50%) of Americans not paying any income taxes.  This just isn’t fair.  If we’re all to participate in the good things that our country has to offer, then we all need to participate in paying a “fair” level of taxes to support those activities.  Everyone should have “skin in the game”.

Public workers compensation packages – Thirty years ago people went to work for the government knowing they were going to make less money, but their job security was going to be very strong.  Today according to John Mauldin, we have a situation where government workers are paid on average forth percent (40%) more than their private sector counterparts.  This is more than unsustainable.  There is no reason government workers should have this sort of bonus and it needs to be brought under control if we’re to reign in our government debt issues

CONCLUSIONS:

The above suggestions and possible solutions are only the tip of the ice burg.  The problem is: WE NEED TO DO SOMETHING and do it quickly—like this year, right now.

 

 

 

THE STATE OF CONFUSION

September 2, 2018


One of the most interesting new restaurants in Chattanooga is called The State of Confusion.  The history of its location will indicate how the name came about.

Fifteen months after the eclectic salvage outlet known as Estate of Confusion closed, the Main Street facility has opened as a unique, indoor and outdoor restaurant and bar known as State of Confusion.  The next two digital pictures will give you some idea as to what existed on that location prior to becoming Chattanooga’s newest eating facility.

The Estate of Confusion served as the location for art-related artifacts needed for photographers, sculptors and fabricators seeking something different.  In other words, it was a high-class junkyard.

The new facility at 301 East Main Street features made-from-scratch Latin American, New Orleans and low-country food, including Peruvian ceviche and wood-fire grilled meats and vegetables.  Their Peruvian ceviche menu is remarkably complete and with an extensive variety.  Approximately $2.5 million was spent to renovate and reactivate the former junk yard, which was owned by Greg Ross for nearly two decades of operation.

The new 330-seat restaurant includes indoor and patio seating in a variety of casual settings.  The design has retained the metal hangar, concrete buildings and foundations of the former salvage yard while adding locally made and unique bars, picnic tables and seating around wood-fired grills.  The outdoor terrace and indoor area are shown as follows:

(I want to apologize for the picture below.  I did not realize I had the bright light in the frame.)  You can get some idea as to the construction of the indoor eating area.  The owners made great effort in retaining the overall design, which explains the ceiling.

“State of Confusion is all about levity and fun with the highest quality, authentic food and fusion of flavors and dishes that you can’t get anywhere else,” said Allen Corey, CEO of Square One Holdings. “We traveled to Peru, the birthplace of ceviche, to understand ceviche; to New Orleans to craft the best muffuletta bread and bologna, and up and down the East Coast to curate the best seafood boils.”

The nearly 11,000-square-foot restaurant opened two weeks ago for lunch, dinner, brunch and special occasions and will offer both sit-down meals or just a place to hang out and sip ice-cold beer (served in ice buckets), cocktails or aguas frescas — a traditional chilled Spanish beverage of water and fruit.

Two bars with inside seating open to the outside terrace and face each other across the patio. State of Confusion will have its own sugar cane expeller to make its mojitos — a cocktail made from white rum, sugar cane juice, lime juice, soda water and mint.

At the front of the new restaurant in the former Main Street storefront, a small bar and takeout facility is being developed known as the Pump House. Sit-down dining will be in both the bigger building on the rear of the lot as well as outdoors in a giant patio, where the restaurant developers plan to put in Igloos in the winter for patio dining in colder weather.

To offer something new to the Chattanooga market (and also not available yet even in Atlanta or Nashville), the ownership decided to bring to the  Chattanooga market a seafood dish popular in the Pacific coastal regions of Latin America known as ceviche, which is considered a national dish in Peru. Ceviche is made from fresh raw fish cured in citrus juices, such as lemon or lime, and spiced with ají or chili peppers.  According to the owners, “This is something totally unique for our area and we think will be very popular.   “It’s light eating, very healthy and sophisticated and has a unique and great taste — if you do it right.” “We really had a crash course with some of the best ceviche chefs in Lima because we want to make sure we offer genuine, Peruvian-style ceviche here in Chattanooga,” Heckler said.

The new restaurant also plans to offer Argentina-style wood-grilled entrees, including house-ground burgers, steaks and seafood and its own unique Bologna. Most of the menu entrees will range in price from $9 to $10 for sandwiches up to $40 for the most expensive ceviche, steak and seafood items. Appetizers will start around $6.50.

To prepare other menu items, restaurant crews traveled to New Orleans and Miami to study menus and food and drink preparation styles and techniques.

“When we started out on this project we knew we wanted authentic cuisine so we traveled to Peru, New Orleans and Miami to be able to deliver these specific culinary items,” Walton said. “We also want to have the levity and the ultimate hang out place that is very casual to allow you to have this great made-from-scratch, unique food in a very fun atmosphere.”

State of Confusion is one of the biggest restaurants to open on the Southside and is among a half dozen eateries that have or will soon open in and around Main Street and the Choo Choo in the past couple of years.

My wife and I walked in about 5:30 P.M. on 31 August to give it a try.  It was already packed with a capital “P”.  Take a look at the experience.

Our waitress was Trystan who turned out to be extremely knowledgeable and very accommodating.  She had sampled all of the entrees and side dishes and came with great recommendation.

We decided to order from the “STARTERS” menu so we might sample multiple dishes. My wife, LOVES shell fish so she had the muscles.

I, on the other hand, really enjoy calamari.

One of the most interesting dishes is the “Monkey Bread” shown below.  It was fabulous. I can certainly recommend it to you when you visit.

CONCLUSIONS:

Reviews are important so let’s take a look at what others are saying. As I mentioned earlier, it’s only been open two weeks so the number of responses is, for the time being, somewhat limited although we loved it and definitely will go back.

I keep saying it’s about time you visit Chattanooga, Tennessee to put “some south in your mouth”.  You are going to love the dining experiences and the scenic experience.  To be a “river city” we offer a great deal. Come on down.

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