How Oxygen and Nitrogen generators are used in manufacturing companies

The air we breathe contains two gases that are extremely useful in industry: oxygen (about 21%) and nitrogen (about 78%). Adding oxygen to a process enables better control of heating patterns, higher furnace efficiencies (for lower fuel consumption) and reduction in particulate and NOx emissions. It’s used with fuel gases to enhance processes including gas welding, gas cutting, oxygen scarfing, flame cleaning, flame hardening and flame straightening. Oxygen is a raw material in many oxidation processes and to regenerates catalysts. Nitrogen gas is used for purposes ranging from inerting and purging to flushing and sterilizing to product transfer and packaging. Many such processes remove undesirable oxygen from a manufacturing process or environment, preventing oxidation that can damage metal parts and sensitive electronics. Nitrogen is also used in refining and gas separation processes. Since oxygen and nitrogen occur together in the air, they must be separated before they can be used. The right tool for the job is an oxygen generator or a nitrogen generator.

How an Oxygen plant works
Oxygen molecules are separated from the other molecules within a clean, dry compressed air stream. Pressure Swing Adsorption (PSA) is a simple, reliable and cost-effective technology that enables continuous, high-capacity oxygen flow at the desired level of purity (90% to 95%). Adsorption happens when atoms, ions or molecules from a substance (compressed air in this case) adhere to a surface of an adsorbent. PSA technology isolates oxygen molecules from other molecules (nitrogen, CO2, water vapor and trace gases) to leave high purity oxygen at the outlet of the generator. The process takes place in two separate pressure vessels (tower A and tower B), each filled with a carbon molecular sieve, that switch between a separation process and a regeneration process.

How a Nitrogen generator works
Nitrogen molecules are separated from other molecules within a clean, dry compressed air stream. Pressure Swing Adsorption technology is used here as well, to isolate nitrogen molecules from other molecules in compressed air to leave nitrogen at the desired purity at the outlet of the Nitrogen plant. For some applications, such as tire inflation and fire prevention, relatively low purity levels (between 90% and 97%) are required. Other applications, such as food/beverage processing and plastic molding, require higher levels of purity (from 97% to 99.999%).

RO and DI filters use different physical reactions to clean water. Reverse Osmosis (RO) is used to partially clean-up tap water to make it roughly 90% to 99% pure. Deionization (DI) filters exchange positive hydrogen and negative hydroxyl molecules for positive and negative contaminant molecules in water. DI filtering and other processes are sometimes referred to as “water polishing.”
Understanding the difference between reverse osmosis (RO) and deionized (DI) is important when identifying the right water purification unit for your lab. Having access to high quality water is essential for laboratories to carry out their daily processes and workflows. By taking a closer look at different methods of producing both types of water, RO and DI, you can feel confident in your decision regarding water purification systems.

This deep cold air separation adopts molecular sieve purification and supercharged turbo expander to supplement the cooling capacity of the device, and at the same time adopts the process of producing argon without hydrogen through full distillation. This process is safe, reliable, and economical. The main reasons are:
1. Good safety The whole set of equipment has low operating pressure, simple process, high equipment safety, long switching cycle of molecular sieve system, long service life of switching valve, and reduced safety hazards. The main cooling (K1) adopts 1% liquid oxygen emission to ensure that the accumulation of hydrocarbons is minimized.
2. High reliability A large amount of surplus nitrogen can be sent to the water cooling tower, reducing the load of the chiller, reducing the energy consumption of the air separation unit, reducing the use cost, and further improving the reliability of the device.
3. Convenient operation and maintenance, simple process

Regenerative desiccant dryers are used in compressed air systems that require dew points to be below the minimum that refrigerated dryers can produce (generally 40 degrees Fahrenheit). Three types of regenerative desiccant dryers are widely used throughout industry: heatless, heated and blower purge.
The following discussion doesn’t address heat-of-compression (HOC) desiccant dryers, even though they require the least amount of energy to operate. The use of HOC dryers is limited to lubricant-free compressors.
Many plants require air quality that only regenerative desiccant dryers can produce. Unfortunately, in too many cases, the decision about which type of regenerative dryer to purchase is based on initial capital cost alone. This decision basis ignores the cost of energy that will be required to operate the dryer. Including energy cost can alter the economics of a purchase decision dramatically.

Some of the first known filters were created to remove unwanted contaminants from water. This process was pioneered by the Romans, but it has also been cited as having other origins. The word “filter” actually comes from the Latin word “filtrum” or “feltrum,” which is related to felt or compressed wool, providing a means to filter contaminants when water passes through it. The development of filters for oil cleanliness did not occur until the early 1900s through the progression of crude oil refining and the automobile industry.

What’s the default order used by WordPress to load CSS files?

I am working with a commercial theme on which I am making some style changes. Specifically, the parent theme shows a menu which I want to modify. The code for that menu is:

 <div class="mobile-navigation hidden-md hidden-lg">         <div id="close-menu-moblie">             <a href="#">                 <i class="icon-close icons"></i>             </a>         </div>    <div class="mobile-menu-container">         <ul id="menu-menu-movil" class="nav-menu mobile-menu">             <li id="menu-item-4723" class="menu-item menu-item-type-custom menu-item-object-custom current-menu-item current_page_item menu-item-4723 active">                 <a href="/" aria-current="page">La Familia</a>             </li>             <li id="menu-item-4724" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-4724">                 <a href="/tierras.html">La Tierra</a>             </li> 

So I created a child theme and added some CSS to it in its style.css file:

#menu-menu-movil li > a {     font-weight: 500;     font-family: Poppins, Arial, sans-serif;     } 

No way: the site ignores my changes. When I inspect the HTML I see that the browser is applying instead CSS instructions from the parent theme that target different classes:

.mobile-navigation .nav-menu > li > a {     font-size: 16px;     color: #1a1a1a;     font-weight: bold;     text-transform: capitalize; } 

So I think that it’s a problem with conflicting CSS instructions and their level of specificity or whatever… but then I try opening the CSS editor in WP Admin at "Appearance / Customise / Additional CSS" and pasting there my changes… and they work.

This led me to think: is there a default order in which WordPress loads CSS from all the possible places where they can be? ("Additional CSS", child themes, parent themes…). I seem to remember that there was, but after searching around on Google for a while I couldn’t find anything. Or is my problem in the end about CSS specificity?

When changing domains, should Google Search Console change of address also be used for domains that redirect to the main domain?

I have site A redirect 301 to site B, now I have site C and want to redirect B to it, what is the best way to change of address with google search console?

Should I set only change of address B to C? or set change of address A to C also? (with current redirect 301 status A to B, B to C)

I use few link lists here..then i used to build my own link list.. now?

Like i tiled on the thread i used to build great link list by few list providers here. But recently i found mine unique links are not allowed for future use… backlinks are there… everything fine.. but just GSA SER don’t support them anymore…
for this reason now i am paying $ $ $ for quality link lists..i know its good and worth..but i like it used to be
any opinions ? 

What are common/standard tools used for web-based interfaces/frontends?

I’m currently implementing a database for a small research group to manage data across multiple (sometimes related) projects with multiple users that should have restricted access to only some tables. The actual database itself was relatively straightforward to design and build in PostgreSQL, with a super class implementation being the only thing that could be considered tricky. Ideally, we would have a professional hired for this task, but I’m the closest thing my group is going to get (I have a lot of programming experience, and have been working with a variety of database systems over the last 10 years for a variety of mostly solo projects).

Unfortunately, my position is only going to last a couple more years, and researchers in my field generally do not have experience designing or administrating databases. So I have to set it up so that the database is fairly easy for this group to manage on their own. Fortunately, we have IT staff that will handle all the low-level hardware/software stuff, so all that’s left for the group is the in-database tasks like creating/managing tables, users, etc.

While I’m reasonably comfortable with tools like pgAdmin, it’s overwhelming and unreasonable to expect others in my group to learn it. They basically need something pared way down and more restrictive so that no one accidentally breaks anything. I could write a Java, Go, or Rust application to handle this, but would prefer exploring web-based options. The main thing is that web development is not what I’ve typically delved into with programming, so I’m not sure what the common capabilities/limits of things like PHP, javascript, etc, are. So my question is, what are common/standard combinations of web development protocols/languages that would be used to create simple web frontends?

The requirements list is pretty simple:

  • Free. Mainly, we don’t have extra money to spend on specialized tools/interfaces (the actual web hosting isn’t a financial issue, though)
  • Easy to host/long-term reliability. My main fear with overly specialized tools is will they work long-term? Something like HTML + PHP is an example of something that appears to have stood the test of time, but my impression is that PHP might be a bit dated (I could be wrong on that, though)
  • No downloads/custom software installation for the users. Basically, all they should need is a web-browser.
  • Data import/export as CSV files. I expect data input to pretty much be in the form of CSV files. It saves the trouble of trying to develop custom forms for each project, especially for future projects that will need custom tables.
  • Enough database interaction capabilities to do things like create/manage users, tables, etc. I pretty much expect this to be possible with any language that can interact with a database, but it doesn’t hurt to specify it.
  • Data logic. Basically, the ability to do some data checks and generate some unique IDs for users for field data and samples. Again, expect this to pretty much be doable with any setup, but specifying it anyway.

An example answer to my question might be "HTML and PHP", but I want to see what other current/modern approaches exist before deciding on anything.

Retrieve date that sequence value was used?

I have an OOB system that has hundreds of tables. Each table has a ROWSTAMP column (integer) that gets populated by a trigger — each time a record is created or updated. All the tables/triggers use the same db sequence. Each time a record is updated anywhere in the db, that one sequence is used to get the next available integer. (I suppose I could consider the sequence to be a sort of global sequence).

IBM: Usage of ROWSTAMP column in Maximo tables

It’s unfortunate that those ROWSTAMP columns are integers, and not dates. What I really need in the tables are CHANGEDATE columns. Dates would be useful for data entry troubleshooting, reporting, and analysis in general. But I can’t really justify customizing hundreds of tables and adding hundreds of triggers in the OOB system. The customized tables wouldn’t be supported by IBM and it wouldn’t be worth the effort/added complexity.

I feel like those ROWSTAMP columns are so close to being useful to me. I can’t help but wonder:

Is there a way to retrieve the date that those ROWSTAMP sequence values were generated?

For example, and I doubt this is possible, could I add a DATE column to the sequence, and then join from my table to the sequence to get the date? Or could I use some sort of logging mechanism on the sequence to put rows (with dates) in a table whenever the next sequence value is used?

I used bool parameter in my animator controller setting it to true by script but where should I set it back to false and when?

using System.Collections; using System.Collections.Generic; using TMPro; using UnityEngine; using UnityEngine.UI;  public class FireEffect : MonoBehaviour {     public Transform player;     public Transform target;      private float timeElapsed = 0;     private float lerpDuration = 3;     private float startValue = 1;     private float endValue = 0;     private float valueToLerp = 0;      private Animator playerAnimator;     private bool prevFacing = false;     private bool stopped = false;     private bool move = true;     private bool rot = false;     private Vector3 currPos;      private void Start()     {         playerAnimator = player.GetComponent<Animator>();     }      private void Update()     {         var currFacing = IsFacing(target);         if (currFacing != prevFacing)         {             timeElapsed = 0;         }         prevFacing = currFacing;          var distance = Vector3.Distance(player.position, target.position);          if (IsFacing(target))         {             if (distance < 10 && move)             {                 if (timeElapsed < lerpDuration)                 {                     valueToLerp = Mathf.Lerp(startValue, endValue, timeElapsed / lerpDuration);                     playerAnimator.SetFloat("Forward", valueToLerp);                     timeElapsed += Time.deltaTime;                 }                 playerAnimator.SetFloat("Forward", valueToLerp);                 stopped = true;                 valueToLerp = 0;             }              if (move == false)             {                 playerAnimator.SetFloat("Forward", 0);             }              if (playerAnimator.GetFloat("Forward") == 0 && stopped)             {                 move = false;                 rot = true;                 currPos = player.position;                 stopped = false;                 Debug.Log("Player current position when valueToLerp value is 0 : " + currPos);             }         }                  if(rot)         {             playerAnimator.SetBool("Walk Back", true);              rot = false;         }          if (playerAnimator.GetCurrentAnimatorStateInfo(0).IsName("Walk Back"))         {             playerAnimator.SetBool("Walk Back", false);         }     }      private bool IsFacing(Transform target)     {         Vector3 forward = player.TransformDirection(Vector3.forward);         Vector3 toTarget = target.position - player.position;         return Vector3.Dot(forward, toTarget) > 0;     }      public IEnumerator ScaleOverSeconds(Vector3 scaleTo, Vector3 rotateTo, Vector3 moveTo, float seconds)     {         float elapsedTime = 0;         Vector3 startingScale = player.localScale;         Vector3 startingRotation = player.localEulerAngles;         Vector3 startingPosition = player.localPosition;          while (elapsedTime < seconds)         {             player.localScale = Vector3.Lerp(startingScale, scaleTo, (elapsedTime / seconds));             player.localEulerAngles = Vector3.Lerp(startingRotation, rotateTo, (elapsedTime / seconds));             player.localPosition = Vector3.Lerp(startingPosition, moveTo, (elapsedTime / seconds));              elapsedTime += Time.deltaTime;              yield return null;         }         player.localScale = scaleTo;         player.localEulerAngles = rotateTo;         player.localPosition = moveTo;     } } 

At this part, I’m setting the bool to true once and it’s playing the "Walk Back".

if(rot)             {                 playerAnimator.SetBool("Walk Back", true);                      rot = false;             }                  if (playerAnimator.GetCurrentAnimatorStateInfo(0).IsName("Walk Back"))             {                 playerAnimator.SetBool("Walk Back", false);             } 

After that, I’m setting the trigger to false when it’s finishing playing it because if I will not set it to false it will keep playing the "Walk Back" nonstop.

I want that it will play it once but also when rot is true again then play it again once. but because I’m setting it false it’s not playing it again even if rot is true again.

animator controller

I created a transition from the Grounded blend tree to the Walk Back with the bool condition in the screenshot.

The Walk Back is working fine smooth as I wanted the problem is now how to make it play once only each time rot is true?

The way or the place in the script I’m setting the bool back to false make it that it will not play the Move Back ever again even if rot is true.