Join devRant
Do all the things like
++ or -- rants, post your own rants, comment on others' rants and build your customized dev avatar
Sign Up
Pipeless API
From the creators of devRant, Pipeless lets you power real-time personalized recommendations and activity feeds using a simple API
Learn More
Search - "supply and demand"
-
Long rant ahead. Should take about 2-3 minutes to read. So feel free to refill your cup of coffee and take a seat :)
It turns out that the battery in my new Nexus 6P is almost dead. Well not that I didn't expect that, the seller even explicitly put that in the product page. But it got me thinking.. why? Lithium batteries are often good for some 10k charges, meaning that they could last almost 30 years when charged every day! They'd outlive an entire generation of people!
Then I took a look at the USB-C wall charger that Huawei delivered with this thing. A 5V 3A brick. When I saw that, I immediately realized.. aah, that's why this battery crapped out after a mere 2 years.
See, while batteries are often advertised as capable of several amps (like 7A with my LiitoKala 18650 batteries that I often use in projects), that's only the current that they can safely take or deliver without blowing up. The manufacturer doesn't make this current rating with longevity in mind. It's the absolute maximum in current that a given battery can safely handle.
The longevity on the other hand directly depends on the demand that's placed on the battery. 500mA which is standard USB 2.0 rating or 1A which is standard USB 3.0 rating, no sweat. The battery will live for at least a decade of daily charges and discharges like that no problem.
But when you start shoving 3A continuous into a battery, that's when it will suffer. Imagine that your current workload is 500mA and suddenly you get shoved 6 times that work upon you. How long would you last?
Oh and not only the current is a problem, I suspect that it also overvolts the battery to maintain a constant current all the way till the end. When I charged my lithium cells with my lab bench power supply, the battery would only take a few milliamps when it got close to the supply voltage. Quick bit of knowledge: lithium cells are charged at constant current first, then when the current drops below that, it continues at constant voltage - usually 4.2 or 4.35V depending on the battery. So you'd set your lab bench power supply at 4.2V 500mA. But in that constant voltage mode, as the battery's voltage and the supply's voltage equalize, the current drops because the voltage difference becomes lower. Remember, voltage is what causes current to flow. Overvolting at the supply to stay in constant current mode all the way till the end speeds this process up but can be dangerous and requires constant monitoring of the battery voltage.
So, why does Huawei and a bunch of other manufacturers make these 3A power chargers? Well first it's because consumer demands ever more, regardless of the fact that they can just charge at 500mA for the night (8h of sleep) and charge a 4000mAh battery from 0 to 100% no problem. Secondly it's because sometimes you need that little bit of extra juice fast, like when you forgot to plug the damn thing in and you've got only 30 minutes in the morning to pour some charge into it.
But people use those damn fucking things even when they go to bed, making that 3A torture a fucking standard process!! And then they complain that their batteries go to shit?!
Hopefully this now made you realize that the fast charger shouldn't be used as a regular charger ^^29 -
I've found sites like Udemy/Khanacademy/Codecademy/Brilliant/Edx to be very useful — possibly more useful than expensive education.
But they still need:
1. Better correction/update mechanisms. Human teachers make mistakes and material gets outdated, and while online teachers are rectified faster than classroom teachers, the procedure is still not optimal. Knowledge should be a bit more like a verified wiki.
2. Some have great interactive coding environments, some have great videos, some have awesome texts, some have helpful communities. None has it all. In the end, I don't want to learn a new language by writing code in my browser. It could all be integrated/synced to the point where IDEs have plugins which are synced to online videos, with tests and exercises built in, up to a social network where you could send snippets for review and add reviews to other people's code.
3. Accreditation. Some platforms offer this against payment, but I think those platforms often feel very old school (pun intended), with fixed schedules, marks and enrollments. Self paced is a must.
4. Depth is important. Current online courses are often a bit introductory. We need more advanced courses about algorithms, theoretical computer science, code design, relational algebra, category theory, etc. I get that it's about supply/demand, but we will eventually need to have those topics covered.
I do believe that for CS, full online education will eventually win from the classroom — it's still in its infancy, but has more potential to grow into correct, modern education.10 -
I've been away, lurking at the shadows (aka too lazy to actually log in) but a post from a new member intrigued me; this is dedicated to @devAstated . It is erratic, and VERY boring.
When I resigned from the Navy, I got a flood of questions from EVERY direction, from the lower rank personnel and the higher ups (for some reason, the higher-ups were very interested on what the resignation procedure was...). A very common question was, of course, why I resigned. This requires a bit of explaining (I'll be quick, I promise):
In my country, being in the Navy (or any public sector) means you have a VERY stable job position; you can't be fired unless you do a colossal fuck-up. Reduced to non-existent productivity? No problem. This was one of the reasons for my resignation, actually.
However, this is also used as a deterrent to keep you in, this fear of lack of stability and certainty. And this is the reason why so many asked me why I left, and what was I going to do, how was I going to be sure about my job security.
I have a simple system. It can be abused, but if you are careful, it may do you and your sanity good.
It all begins with your worth, as an employee (I assume you want to go this way, for now). Your worth is determined by the supply of your produced work, versus the demand for it. I work as a network and security engineer. While network engineers are somewhat more common, security engineers are kind of a rarity, and the "network AND security engineer" thing combined those two paths. This makes the supply of my work (network and security work from the same employee) quite limited, but the demand, to my surprise, is actually high.
Of course, this is not something easy to achieve, to be in the superior bargaining position - usually it requires great effort and many, many sleepless nights. Anyway....
Finding a field that has more demand than there is supply is just one part of the equation. You must also keep up with everything (especially with the tech industry, that changes with every second). The same rules apply when deciding on how to develop your skills: develop skills that are in short supply, but high demand. Usually, such skills tend to be very difficult to learn and master, hence the short supply.
You probably got asleep by now.... WAKE UP THIS IS IMPORTANT!
Now, to job security: if you produce, say, 1000$ of work, then know this:
YOU WILL BE PAID LESS THAN THAT. That is how the company makes profit. However, to maximize YOUR profit, and to have a measure of job security, you have to make sure that the value of your produced work is high. This is done by:
- Producing more work by working harder (hard method)
- Producing more work by working smarter (smart method)
- Making your work more valuable by acquiring high demand - low supply skills (economics method)
The hard method is the simplest, but also the most precarious - I'd advise the other two. Now, if you manage to produce, say, 3000$ worth of work, you can demand for 2000$ (numbers are random).
And here is the thing: any serious company wants employees that produce much more than they cost. The company will strive to pay them with as low a salary as it can get away with - after all, a company seeks to maximize its profit. However, if you have high demand - low supply skills, which means that you are more expensive to be replaced than you are to be paid, then guess what? You have unlocked god mode: the company needs you more than you need the company. Don't get me wrong: this is not an excuse to be unprofessional or unreasonable. However, you can look your boss in the eye. Believe me, most people out there can't.
Even if your company fails, an employee with valuable skills that brings profit tends to be snatched very quickly. If a company fires profitable employees, unless it hires more profitable employees to replace them, it has entered the spiral of death and will go bankrupt with mathematical certainty. Also, said fired employees tend to be absorbed quickly; after all, they bring profit, and companies are all about making the most profit.
It was a long post, and somewhat incoherent - the coffee buzz is almost gone, and the coffee crash is almost upon me. I'd like to hear the insight of the veterans; I estimate that it will be beneficial for the people that start out in this industry.2 -
Reasons why I hate the hospital I work for...
1. NO fucking budget, for fuck sakes our telecom system is still running Merlin Magix. (I’ve been working on getting the trunk and everything to at least push FreePBX out... Configuration configuration.) but, that requires a decent server to host said system... But guess what? We’ve still got a few servers online that are running server 2012 r2. NO FUCKING BUDGET.
2. Training. They don’t have the budget to send me to training, but the doctors here are rolling in Mercedes... Must be fucking nice.
3. I have 5 f-I-v-e job descriptions. I’m a bio medical technician, network admin, system admin, programmer, and help desk... I fucked up allowing them to know I program.
4. On call 365 days a year. That’s nice and all, but when I’ve got shit to do and the nearest Walmart is an hour away I don’t want a call from Louis “oh the printer has a jam” FUCK OFF LOUIS! Get the paper out, we’ve been over this, I believe in you!
5. Some of the FUCKING (l)users.... You wouldn’t imagine some of the calls I receive, some of my favorite being late late “Hey *anonyops* I know it’s late but we’re needing a chair moved from one room to the other.” FUCK YOU YOU CHEEKY FUCKING CUNT.
The only reason I’m still here is my direct supervisor and a hand full of people that I’ve grown to love. Also, because any computer related job here is either outsourced or filled by a YouTubing god. - reason 1 why I started my own business. Supply and demand.
Rural Kansas Hospitals = shit, inb4 thanks —insert president to blame—20 -
Yesterday, due to high supply and low demand, the price of a barrel of crude oil was around -40 USD. Which means no matter how worthless your code is, it's at least worth more than oil at the moment6
-
In recent years, the retail industry has undergone a radical transformation, thanks to the unstoppable rise of Artificial Intelligence (AI). From enhancing customer experiences to optimizing supply chain management, AI has become the driving force behind the success of modern retailers.
One of the most significant ways AI has impacted the retail landscape https://data-science-ua.com/industr... is through personalization. AI-powered recommendation engines analyze vast amounts of customer data, including past purchases, browsing behavior, and demographic information, to provide tailored product suggestions. By understanding individual preferences, retailers can deliver highly targeted marketing campaigns, leading to increased customer engagement and loyalty.
Moreover, AI has revolutionized customer service within the retail sector. Chatbots and virtual assistants equipped with natural language processing capabilities enable retailers to offer round-the-clock support, promptly resolving customer queries and concerns. This not only enhances customer satisfaction but also frees up human resources for more complex tasks, ultimately boosting operational efficiency.
AI's influence is also evident in inventory management and demand forecasting. By analyzing historical sales data and external factors such as weather patterns and social media trends, AI algorithms can predict future demand accurately. Retailers can optimize their inventory levels, reduce waste, and ensure products are available when and where customers need them, improving overall profitability.
Beyond enhancing customer-facing aspects, AI has also found applications in the backend processes of retail operations. Supply chain management benefits from AI's ability to streamline logistics, optimize route planning, and reduce transportation costs. By leveraging AI in this way, retailers can ensure that goods are delivered efficiently, meeting the demands of today's fast-paced, online-driven shopping culture.
Another area where AI shines is in fraud detection and prevention. AI-powered systems can detect unusual patterns and behaviors, helping retailers safeguard their customers' financial information and prevent potential losses due to fraudulent activities.
However, while the adoption of AI in retail brings about numerous benefits, it also raises ethical considerations. Retailers must be mindful of data privacy and ensure that customer information is handled securely and responsibly.
Artificial Intelligence has become an indispensable tool in the retail industry, transforming the way retailers operate and engage with customers. From personalized shopping experiences to optimized supply chains, AI's impact is both far-reaching and unstoppable. Embracing AI and leveraging its capabilities will be key for retailers seeking to stay competitive in the ever-evolving retail landscape. As we continue to advance technologically, the partnership between humans and AI is likely to define the future of retail. -
There are lots of Angular and React jobs here in my area. Very few Vue jobs here (like 1 to 5 maximum job posts I have seen). I'm a PHP dev and it seems most companies are shifting to full stack JS development (MERN, MEAN, NodeJS + Express JS, etc.) along with some mobile development (ionic, cordova, etc)
I have no choice but to study both Angular and React. Supply and demand.
But between Angular and React, I prefer Angular.6 -
I have legitimately identified an 9 figure (possibly more) market with 1. massive demand, 2. sufficient supply, 3. literally, I kid you not, zero companies in the field. No regulations to speak of.
The overhead is trivial and it is very much a network-effect based market.
No I am not joking. Yes this is real.
What do?
edit: 9 figures not 8. Yes it's that big.12 -
Why is there no VueJS job requirements in my area? It is all about Angular and React. Quite sad my favorite JS Framework is not a favorite here.
Guess I'll be forced to study Angular or React for job requirements purposes only *sigh* 😩 It is like - forced eating the only available food that you don't like in order to survive. Oh well supply and demand.
I haven't seen any VueJS requirements yet in all the job posts that I browsed 😕11 -
I used to work for a consultancy that specialised in a very niche area (I won't say what – this is traceable enough already!). We charged our clients a very high hourly rate, because demand and supply. All the time I'd get calls like the following:
"Please could you just make this small change to the deployment?"
"Yes, of course. You don't have any contract hours left, so I'll just forward you to our billing department so you can sort out the payment first"
"Ah okay, please can you tell us how to do it"
[Even if I explained it, you wouldn't be able to do it – that's why you're coming to us.]
"...or better yet, just do it as a quick fix outside of work?"
[So... work for no pay? No thanks.]
While my company always had my back on these requests (obviously, they wanted payment too), they were so frequent that I got sick of it.1