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techcronus · 9 months ago

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Best Practices for Hybrid App Development

In today's fast-paced digital market, organizations require apps that perform across several platforms. Hybrid app development has become a popular option for businesses trying to build versatile and cost-effective applications. However, to ensure that these apps are of the highest quality, developers must follow a set of best practices. In this article, we'll look at key techniques for developing high-performance, scalable hybrid applications.

1. Select the Right Framework.

Choosing the right development framework is critical to the success of your hybrid application. Popular frameworks such as Ionic, React Native, and Xamarin provide distinct benefits, so choose one that best suits your project's requirements. For example, React Native delivers near-native speed, but Ionic has a more web-focused approach.

2. Concentrate on User Experience (UX).

A successful app relies heavily on the user experience. Ensure that your hybrid app has smooth navigation, fast loading times, and a consistent experience across platforms. Because hybrid apps combine native and web technologies, you must take great care to maintain a consistent user experience across all platforms.

3. Optimize performance.

Hybrid apps may not always perform as well as native ones. To close the gap, optimize your code and assets. This involves leveraging lazy loading for content, optimizing pictures, and limiting the number of HTTP queries. Proper performance optimization might result in speedier, more responsive software.

4. Utilize Plugins and Native Features.

Hybrid app frameworks enable developers to use native device functions like as GPS, camera, and notifications. However, do not overburden your app with plugins. Instead, just add those required for your app's core functionality to maintain optimal performance and seamless integration with native components.

5. Ensure cross-platform consistency.

One of the most difficult aspects of hybrid app development is maintaining consistency across several devices and operating systems. The app should provide a consistent experience, regardless of whether the user is using iOS, Android, or a web browser. Test your app carefully across numerous platforms to ensure that the design, performance, and functionality are all consistent.

6. Testing & Debugging

Before your app goes live, you must conduct thorough testing to discover and fix any flaws. Use tools like BrowserStack or Sauce Labs to test your hybrid app on many devices and platforms. Debugging tools, such as Chrome DevTools, can also help identify performance issues in hybrid apps.

7. Regular updates and maintenance.

After starting the app, ongoing monitoring and upgrades are required to ensure compatibility with new operating system versions, devices, and security patches. Regular updates maintain your app's long-term performance and security.

8. Security is key.

Because hybrid apps make use of online technology, security might be an issue at times. To reduce risks, utilize HTTPS for all API communications, create robust authentication procedures, and update libraries on a regular basis to address any security issues.

9. Native vs. Hybrid Decision Making.

While hybrid apps are versatile and cost-effective, there are times when native development is a better fit, particularly for apps that require heavy graphics, high performance, or complicated functionality. Always assess your app's requirements before deciding on hybrid development.

At Techcronus, we specialize in hybrid app development using the latest technologies to deliver high-quality, cross-platform apps. Our experienced developers focus on optimizing performance, user experience, and security, ensuring that your app works seamlessly across platforms while meeting your business goals.

Why Choose Techcronus for Hybrid App Development?

Expertise in leading hybrid frameworks like Ionic, React Native, and Xamarin

Customized solutions tailored to your business needs

Focus on delivering high-performance, secure, and scalable apps

Ongoing support and maintenance services for long-term success

#Hybrid App Development

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i4technolab · 3 years ago

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Here are the steps to create an Ionic application using Authguard, it is very common and acquired by most of the real world and many Ionic Mobile Application Development Companies

Open visual studio code and then open terminal in it.

Write command like “ionic start Demo —tabs”

Open the recently made application in visual studio code.

Type command like “ionic serve”. So it will run our application into our system’s default browser.

If you want to run out application in simulators, then there will be command like “ionic cordova run ios”.

To create login page there will be command like “ionic g page login”.

So the routing of login will be created at “app-routing.module.ts” file.

Now we want to restrict our user to access our main tab bar pages without authorization token. For that, we will create new module related to the core module with the command like “ionic g m core”.

We have to create Authguard via this command like “ionic g guard core/auth”. It will generate the guard in core folder.

Then create an activate method that will be used to make a route for tabs or login as per the authorization token which we have obtained at the time of login.

Now install the storage plugin for ionic 4, that will be used to store the token.

Import our ionic storage module in “app.module.ts” file.

Inject storage from Ionic storage module in auth guard file which is used for validation of authorization token.

We will do same business logic which can activate method that if we got the token then we have to navigate to our tabs screens otherwise move the user to login screens.

Now use same activate method in “app-routing.module.ts” file to prevent user to navigate to tabs screen with the guard file with the code like “canActivate: [AuthGuard]”.

Create some login page to add email and password things for the user with the reactive forms

So for that we have to import reactive forms module in “login.module.ts”

Do some validation for email and password as in-built validation provided in angular reactive forms?

Do some business logic like if our form is valid then store our authorization token into local storage and navigate to the tabs screen.

If we want to make some custom service that will handle our toast messages, then create toast service in our core folder with the command like “ionic g s core/toast”

Now import toast controller into toast service file and add method to present our dynamic toast messages.

Now we want to use toast service in the login screen so we have to import our toast service in “login.module.ts” file in “providers” array.

If you want to change any theme color of login page then we can easily change from “variables.scss” file.

Now all things are set and we have to run our application with command as described in step 4 or 5.

Now if we want to add Android platform then just write command like “ionic cordova platform add android”

After successfully adding platform, just run the command like “ionic cordova run android --device”. So it will run our app into android device

Now first it will display a login screen and we have to login with our credentials and if our form is valid then app will redirect to tabs screen.At last router will redirect to login page.

At last router will redirect to login page.

#ionic4 #ionic 6 #authentication in ionic 4 #ionic 4 authentication tutorial #ionic 4 authentication example #authentication with authguard in ionic 4 #ionic 4 authentication with authguard tutorialionic 4 authentication with authguard example

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mancdev · 7 years ago

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VueJS & Firebase Cloud Firestore Stripped-Back - Tutorial Part 1

In this tutorial series we will explain how to start developing with the Vuejs framework & Firebase Cloud Firestore to build full-stack web applications. We’ll start from scratch by stripping everything back to the basics - no CLIs, build tools or bundlers, just a HTML page, an editor and a browser so you can get to grips with building apps with Vue & Firebase more quickly and be productive faster.

VueJS

Vuejs is now one of the big 3 Javascript frameworks in the web client ecosystem. However it’s not developed or backed by a huge corporation, it was developed by one individual, Evan You. The proliferation of JS frameworks in recent years has led to the term “Javascript Fatigue” where developers have become weary of all of the new and self-proclaimed “latest and greatest” open source frameworks. It is in this environment that Vue has emerged through all of the noise to become a major player alongside Angular and React (both backed by huge technology companies, Google and Facebook respectively). That Vue has achieved such a status in this environment backed by one individual highlights just how Vue has hit a chord with developers and is filling a gap that isn’t being met by Angular, React or other competitors like Ember and Aurelia.

Evan You is an ex-Googler who was familiar with AngularJS (often referred to as Angular 1) and used it for internal projects at Google that he was working on. He set out to achieve a framework that delivered the benefits of AngularJS but was more lightweight, faster and better suited to smaller apps that didn’t require the heavy-lifting of the huge apps that AngularJS was originally built to develop such as their Adwords platform and their internal CRM system. What he produced was a beautifully simple solution and it quickly attracted adoption as the front-end framework of choice for many PHP developers, particularly from the Laravel community.

Despite promising early adoption in some quarters, Vue may well have stayed a “me-too” framework in the ecosystem had it not been for Google’s decision to redevelop their AngularJS framework from scratch. Angular (often referred to as Angular 2) was such a departure from the original AngularJS framework that it introduced a fundamental shift in approach and required developers to learn many new concepts just to build basic apps. Developers were kept in limbo between AngularJS and Angular for almost 2 years, with many alphas and then betas and many breaking changes and missing pieces to deal with during the transition and then no easy migration path for their existing code and apps.

There’s no doubt that, as a new framework in it’s own right, Angular is a fantastic, powerful, all-in-one next generation framework but it isn’t “Angular” as millions of developers know it. Perhaps the biggest mistake Google made was in not launching their next-gen framework under new branding. In any event and unfortunately for Google, Angular 2 was too big a change for many developers and while uptake was initially high, it hasn’t achieved the type of ongoing adoption or love as AngularJS or React and it’s clear that Vue, with many obvious similarities to the original Angular, has arrived just in time to sweep up and become a magnet for disgruntled Angular devs.

In addition, the droves of developers jumping in to the Javascript ecosystem over the past years, in their evaluation of an appropriate framework, are choosing Vue in vast numbers due to how easy it is to learn and how quickly they can start building apps. I would say that the best word to describe Vue to developers choosing a framework is “approachable” - it seductively invites you in and once there you find it’s so intuitive and simple to get productive, covering all of the bases you need, that once you’re in you tend to stick with it. For me personally I actually enjoy spending my days developing around Vue, I cannot say the same for Angular unfortunately.

In 2018, Vue is set to gain even greater momentum and overtake Angular into second place in the Javascript framework popularity chart. The main reason for this may be that the massively popular Ionic mobile and PWA framework is about to release a version that decouples it from Angular and enables developers to build apps with Ionic using any framework (or none at all). It’s interesting that this is likely to be a tipping point for Vue to achieve critical mass and yet is due to the Ionic team’s concern that Angular isn’t seeing the level of adoption anticipated and continuing to hitch their wagon to Angular is likely to hamper their own growth.

To address this, in Ionic 4, they’ve developed a framework-agnostic, web component-based edition of their mobile framework. When you look online it’s fairly clear that the majority of the delight at Ionic’s shift away from Angular is coming from those who want to use Ionic with Vue. Personally I only stuck with Angular because of Ionic despite my preference for Vue and since their announcement of Ionic 4, I have thrown myself fully into Vue. The sweet spot that Vue hits between Angular and React is in delivering a more lightweight and simple approach than Angular, focussing first and foremost on being a view renderer like React but providing optional elements that are officially supported and developed by the Vue core team, such as routing that can be easily dropped in to your app. This is what is meant when Vue is called a “progressive framework”, you can start by using as little or as much of the framework as you need, progressively using more of it’s subsidiary elements as required. Another advantage to using Vue is that it’s lightweight enough to use it in one part of your app and progressively expand it to other parts when you’re ready, for example if you have existing app in vanilla Javascript, jQuery or another framework that you want to change over to Vue piece by piece.

As mentioned, Vue’s biggest advantage is it’s simplicity and approachability. While other frameworks require knowledge of build systems, CLIs, Node, NPM etc just to start building an “Hello World” app, with Vue you can strip everything right back, open up an HTML file in an editor and get started simply without needing to spend time learning anything else. While you’ll likely want to move over to the full modern JS development environment as you get more involved, it isn’t required to get started.

Firebase Cloud Firestore

So Vue is a fantastic front-end framework but to build even the most trivial worthwhile app, we need a back-end and a data store. Like with using Vue, we want to use something that delivers simplicity and approachability yet gives us the power to build advanced apps as you become more experienced. For this project Firebase Cloud Firestore is a no-brainer to use as the database back-end. Like Vue, we can just get started using Firebase with just a basic HTML page - no need for CLIs and build tools to just start building something.

I first used Firebase back in 2014, when they were a small, private company shortly before they were acquired by Google. At the time Firebase was not a platform but a hosted realtime database and I fell in love with it immediately - for prototyping it was perfect and it’s realtime capabilities were just awe-inspiring at the time.

However Firebase did have some serious limitations that made it unsuitable for me to use as the back-end database in a production app. It didn’t allow server-side code, so all of your logic was exposed on the client and it’s database querying facilities were extremely limited. Also, as a No-SQL document database, organising relational-style data into something that was manageable without joins and queries required denormalisation and duplication of data, something which is anathema to those coming from a SQL-based relational database background. I felt it was a real shame as, despite these limitations, it was very impressive and working with it’s Javascript API was a joy.

After Google’s acquisition, Firebase was expanded into a full serverless platform allowing for storage, cloud messaging, hosting, authentication, analytics and much much more. What had been “Firebase” became the Realtime Database element of the platform. Fortunately Google started to address the limitations that I and many other developers had found with the original Firebase. First server-side code, in the form of Cloud Functions, was added which enables you to put more of your sensitive business logic code onto the server.

More recently Google introduced an alternative database to the original realtime database which they call Cloud Firestore. Cloud Firestore addresses many, but not all, of the issues with the realtime database in terms of querying and organisation of data. It still provides the full realtime capabilities that we know and love and is still a No-SQL database based on documents. However you can now organise them into Collections (similar to relational DB Tables) which enables you to perform much more advanced queries. You can have specifically defined fields each of which can have a specific type. One of these types is the Reference type which lets you store links between documents on different collections to enable a form of join. In addition Cloud Firebase enables offline usage so the user can continue to use your app even if access to the server isn’t available. There are still limitations, remembering it’s not a relational database, and full joins are not possible and neither are aggregate queries such as SUM, COUNT etc. However with 90% of the issues I had with the original Firebase realtime database now dealt with through Cloud Functions and Cloud Firestore, Firebase is now an excellent choice as the back-end, serverless platform and data store for building full-scale production apps.

OK so enough talk about the what and why, let’s get going with the how and write some code. We’re going to start, as we’ve talked about, with a single HTML page. Choose your OS, code editor and browser of choice (I’m using VSCode on OSX and highly recommend using Chrome as your browser).

Open up your editor and select to create a new file in a new folder. Just call the new file index.html. Once you’ve done this, start with a skeleton html page as shown below :

<html>

<head> <title>VueJS & Firebase From Scratch</title> </head>

<body>

</body>

</script>

<html>

The first thing we’ll need to do is to import the VueJS library. We can do this with a CDN link (see below) which is placed below the closing body tag and before the opening script tag :

This recommended CDN link is correct at the time of writing however may change in future. To ensure it’s correct, once you’ve inserted this link into your page, save it and open it up in Google’s Chrome browser (select File from Chrome’s menu and select Open File … to navigate and select your newly created index.html file). The page will show as blank in any case however right-click on the page and select Inspect from the pop-up menu and click the Console tab. If this displays nothing eg there are no error messages then you’re good however if you do get an error complaining about the vue library then browse to https://vuejs.org/v2/guide/ and look for the link displayed under Getting Started.

We’re ready to build our app! The first thing we need to do is to create the Vue Instance Object that will be used as the core of your app.

This creates a new Vue instance that we can reference throughout our html template and which contains all of the data and methods that we’ll create to develop the app. Some call it the View Model however we’ll stick to calling it the Instance Object. We simply create a new object called app from Vue and pass in an object with all of the information about our app. To begin with, we only declare a single property in this object which is el, short for element, and we assign #app. This tells Vue that any reference to an element that has the id of app is to be controlled by our Vue Instance Object.

In our html template we can now simply create a container html tag and assign it the id of app. All of the content within that tag is then controlled automatically by our Vue instance object. (Please note that any content in bold from here on in denotes new or changed content.)

<body>

</div>

</body>

Please note : Unlike AngularJS, with Vue you cannot assign the reference to the Instance Object on the body tag, you have to create your own container tag to assign it to, as in this case we’re assigning it to a div container.

Great but we’re not actually doing anything yet. Now we want to give our app some life. To do this we’ll give the app a name and display it as a title and we’ll do this as data held on the Instance object rather than write it directly on the template. To do this we’ll need to add another property called data to our instance object. The data property is an object which contains any variables you want to reference in your template or elsewhere in your app. In this case we’ll create a variable called appTitle and assign it a name. The app we’re going to build is an employee tracker that is going to be so indispensable to it’s users that it will be like magic!

We can now use the data binding features of Vue to display our new app title in our page template.

<body>

<h1>{{ appTitle }}</h1>

</div>

</body>

Save and refresh your page in Chrome and you’ll see EmployeeMagic as your app header. The double curly braces are pretty standard in most frameworks these days to denote data-binding (also called interpolation). The content inside the double-curlies is interpreted by Vue and the required content is displayed at that point in the template. In this case Vue recognises that we have a variable called appTitle in data in our Instance Object and replaces it in our template with the value contained in the variable. There are many benefits of data-binding, the main one being that any change in the variable in our instance object is automatically reflected in our template without any additional effort on our part.

So far so good but it’s a little plain-Jane so let’s add the Bootstrap library link for a bit more aesthetic to it without any extra effort. The link used below for then Bootstrap CDN was current at the time of writing however check the Bootstrap website if you have trouble with the link :

<header> <title>EmployeeMagic</title>

</header>

Let’s say however we want to add a margin around the app so it’s not displaying right up against the edge all the time. To do this we’ll need to add some CSS styling however we can take advantage of a cool Vue feature which lets us set our styles programatically.

Let’s add another variable to our data object which is specifically for styles, let’s call it mainStyle. This will be an object so that we can assign as many different CSS style settings as we like. For now we just want to assign a margin of 20 pixels :

Now we need to tell Vue where to use that styling property in our template. We’ll create a new container div tag to wrap around the rest of our app. In that tag we need to tell Vue to assign the styling we’ve defined in mainStyle. To do this we can use a Vue directive called v-bind:style and assign it the name of style object we want to use.

<body>

<h1>{{ appTitle }}</h1>

</div>

</body>

Save and refresh in Chrome and you’ll see the margin has been applied. I personally love this feature of Vue and there are lots more you can do to apply styling which we’ll cover later in the tutorial.

It’s interesting to note that when using directives such as v-bind:style, Vue offers a more shorthand way by dropping the v-bind. If Vue just sees :style it knows what to do, so we could have used ...

... instead. Throughout these tutorials I’ll continue to use the more verbose version to show the full directives consistently however where a new directive is shown, I’ll also highlight the shorthand version. Generally if you see v-bind followed by a colon and the command, you can drop the v-bind although there are exceptions that we’ll cover in a future part of the tutorial.

We’ve so far covered what VueJS and Firebase Cloud Firestore are, why we’re using them as the framework and platform for this app, and the basics of setting up a simple HTML page to build our employee tracker app, setting up our Vue object, basic data-binding and styling using a Vue directive.

In the next 4 parts of this tutorial we’ll focus on each element of CRUD (Create, Read or Retrieve, Update and Delete) so in part 2 we’ll deal with Creating records to store in our Firebase Cloud Firestore.

Hope you can join me in Part 2 :)

You can download the completed code for this part of the tutorial on Github using the repo below and select the part1 folder. https://github.com/MancDev/VueFire

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t-baba · 5 years ago

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Angular 10, data grids, randomness, and checking some boxes

#494 — June 26, 2020

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JavaScript Weekly

Lessons Learned Refactoring Optional Chaining Into a Large Codebase — Lea Verou, creator of Mavo, decided to refactor Mavo to use optional chaining (?.) and here’s some of what she discovered along the way. (As an aside, Lea was the subject of a neat 10 minute programming documentary recently – worth a watch!)

Lea Verou

A Little Bit of Plain JavaScript Can Do A Lot — For anyone more than happy to dive in and write JavaScript without dragging in an entire framework and tooling to manage it, there will be no surprises here, but this is a nice reminder otherwise. Do you always need a 'framework'? No.

Julia Evans

Creating a Voting App with Firestore and Wijmo — Learn how to build a realtime voting app quickly and easily with the Firestore database and Wijmo components. The app uses OAuth for authentication and allows users to submit and vote for ideas.

Wijmo by GrapeCity sponsor

Angular 10 Released — A major release for the popular Google-led framework, though smaller in scope than usual as Angular 9 only came out in February ;-) 10 gains a new date range picker, optional stricter settings, and an upgrade to TypeScript 3.9.

Stephen Fluin (Google)

What's Coming in TypeScript 4? — The first beta of TypeScript 4 is due any moment with a final release due in August. New bits and pieces include variadic tuple types, labelled tuples, short-cut assignment operators (e.g. ||=) and more.

Tim Perry

⚡️ Quick bytes:

Chrome 85's DevTools have gained better support for working with styles created by CSSOM APIs (such as by CSS-in-JS frameworks). There's also syntax autocompletion for optional chaining and highlighting for private fields.

There's nothing to see just yet, but NativeScript is coming to Ionic.

The creator of AlpineJS has written about how he's passed $100K/yr in income using GitHub Sponsors.

Did you know there's a Slack theme for VS Code? 😆

▶️ The JS Party podcast crew discusses how their use of JavaScript syntax evolves (or not) over time.

engineeringblogs.xyz is a new aggregator site (by us!) that brings together what 507 (so far) product and software engineering blogs are talking about. Worth a skim.

💻 Jobs

JavaScript Developer at X-Team (Remote) — Join X-Team and work on projects for companies like Riot Games, FOX, Coinbase, and more. Work from anywhere.

X-Team

Find a Job Through Vettery — Vettery specializes in tech roles and is completely free for job seekers. Create a profile to get started.

Vettery

📚 Tutorials, Opinions and Stories

ECMAScript Proposal: Private Static Methods and Accessors in Classes — Dr. Axel takes a look at another forthcoming language feature (in this case being at stage 3 and already supported by Babel and elsewhere).

Dr. Axel Rauschmayer

npm v7 Series: Why Keep package-lock.json? — If npm v7 is going to support yarn.lock files, then why keep package-lock.json around as well? Isaac goes into some depth as to how yarn.lock works and why it doesn’t quite suit every npm use case.

Isaac Z. Schlueter

How to Dynamically Get All CSS Custom Properties on a Page — Some fun DOM and stylesheet wrangling on display here.

Tyler Gaw

Stream Chat API & JavaScript SDK for Custom Chat Apps — Build real-time chat in less time. Rapidly ship in-app messaging with our highly reliable chat infrastructure.

Stream sponsor

Getting Started with Oak for Building HTTP Services in Deno — A comprehensive Oak with Deno tutorial for beginners (which, I guess, we all are when it comes to Deno). Oak is essentially the most popular option for building HTTP-based apps in Deno right now.

Robin Wieruch

Understanding Generators in JavaScript — Generator functions can be paused and resumed and yield multiple values over time and were introduced in ES6/ES2015.

Tania Rascia

Build a CRUD App with Vue.js, Spring Boot, and Kotlin — It’s a fact of life that not everyone is building apps with JavaScript at every level of the stack. Sometimes.. people use Java too 🤫

Andrew Hughes

▶ Creating a Basic Implemention of 'Subway Surfers' — No modules, webpack or such-like here.. just exploring the joy of throwing a game mechanic together quickly using rough and ready JavaScript. Love it.

Shawn Beaton

Rubber Duck Debugging for JavaScript Developers — When you’re stuck with something, why not talk to a rubber duck?

Valeri Karpov

🔧 Code & Tools

Tabulator 4.7: An Interactive Table and Data Grid Library — Supports all major browsers and can be used with Angular, Vue, and React if you wish. 4.7 is a substantial release. Among other things is a new layout mode that resizes the table container to fit the data (example).

Oli Folkerd

Tragopan: A Minimal Dependency-Free Pan/Zoom Library — Try it out here. Claims to work faster due to use of native browser scrolling for panning (left/right/up/down) and transform/scale for zooming.

team.video

Builds Run Faster on Buildkite 🏃‍♀️ — Build times <5 mins at any scale. Self-hosted agents work with all languages, source control tools & platforms.

Buildkite sponsor

React Query 2: Hooks for Fetching, Caching and Updating Async Data — React Query is well worth checking out and has extensive documentation and even its own devtools. Main repo.

Tanner Linsley

Rando.js: A Helper for Making Randomness Easier — The rando function lets you get random integers in a range, floats in a range, pick between multiple items, return a random element from an array, and more. There’s also randosequence for a more shuffle-like experience.

nastyox

jinabox.js: A Customizable Omnibox for AI Powered Searching — Designed to be used with a Jina back-end. It’s all open source, but will take some digging around to understand fully.

Jina AI

MongoDB Is Easy. Now Make It Powerful. Free Download for 30 Days.

Studio 3T sponsor

IntersectionObserver Visualizer — If you’re new to using the IntersectionObserver API, this useful interactive demo might help you comprehend it a little better.

michelle barker

Polly.js 5.0: Record, Replay, and Stub HTTP Interactions

Netflix

Vest: Effortless Validations Inspired by Testing Frameworks — If you’re used to unit testing, the syntax used here will be familiar.

Evyatar

👻 Scary Item of the Week

Checkboxland: Render 'Anything' as HTML Checkboxes — This frivolous experiment is equal parts terrifying and impressive. It’s a JS library that displays animations, text, and arbitrary data using nothing but HTML checkboxes and, to be fair, they’ve presented it really well!

Bryan Braun

by via JavaScript Weekly https://ift.tt/3g53MDU

#Javascript Branding #Javascript Weekly

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toursinathens2k20 · 5 years ago

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Tours in Athens- the best way to Relax and Enjoy both at Same Time

Sometimes 9 to 5 jobs becomes a real headache when you do not get proper time to relax and enjoy your life. So as to eliminate this boredom, opt tours in Athens. This is one of the best ways to bring yourself to ease and have an immense adventure with your loved once.

Athens is the capital of the archaeological country-Greece. It holds a very important role in the history of the world, and so as Athens does. So let us have a glance over some hand-picked top places of Athens-

1. Parthenon: -

It is the foremost temple and the best example of the authentic construction of the 5th century. This temple is devoted to the goddess Athena, whom the people of Athens conceded their patron.

2. Erechtheion: -

It is the temple made with 6 female figures and four Compartments. The Erechtheion is a biblical Greek temple on the north side of the Acropolis of Athens, which was dedicated to both Athena and Poseidon as the patrons of the countrymen. It is said that no Tours in Athens ends without visiting Erechtheion temple.

3. Temple of Athena Nike: -

It is the temple that is named after the Greek Goddess, Athena Nike. The Temple of Athena Nike located on the Acropolis of Athens, dedicated to the goddess Athena Nike. This temple is the early-flowering fully Ionic temple on the Acropolis.

4. Lycabettus Hill: -

Lycabettus is a limestone hill in Athens, which is placed 908 feet above the seashore. Its foundation is screened by pine trees and at its tips, there are amazing auditorium and a restaurant, specially built to enhance its beauty.

They have a lot of different famous places on their tour list to visit, it depends upon the time period you want to spend here. Famous Museum with all the antique items from the history to the latest memorials all, are here to your Tours in Athens unforgettable and adventurous.

For More Information Please Visit: -

http://enjoygreecetours.com/private-tours-in-athens/

#Tours in Athens

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iwatchjr-blog · 5 years ago

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Iwatchjr - Sensor technologies that are set to break out in wearable

Most smartwatches and fitness trackers are crammed full of sensors said by iwatchjr. Take the Apple Watch Series 4 as an example, which has a barometric an altimeter to measure altitude, an electrical heart sensor to take ECG readings, an accelerometer to keep tabs on movement, an optical heart sensor to measure your heart rate, a gyroscope to track movement and rotation, and an ambient light sensor to control the brightness of your screen.

Although space is extremely limited inside wearable, as the tech becomes smaller and more advanced, new sensors are added to tell us more information not only about ourselves, but the world around us. Apple recently shook things up when it added an electrical heart sensor into Series 4, with many more tech brands expected to follow suit.

The big question now is: what other sensors will be added to the next generation of wearable this year, next year and beyond? As you might expect, it’s not easy to guess, and many companies are secretive about revealing new tech.

But we can make some predictions about what’s in store for mainstream wearable, based on more niche products currently seeking funding, smaller projects that never made it off the ground, and what the medical tech community is researching and working on right now.

According to iwatchjr, over the past four years, there’s been a surge in tech dedicated to sensing the quality of the air around us, whether that’s general pollution and allergens or more harmful gases and toxins.

Air sensing and cleaning tech isn’t new and has already made its way into our smart homes with devices like the Netatmo Home Coach. But the air we breathe at home only makes up part of our days.

As you’d expect, a number of companies are already coming up with ways to carry air-sensing tech with us 24/7. Plume Labs launched the Flow wearable air pollution tracker in June 2018. It looks like a memory stick and attaches to bags or clothing to track pollution as you travel. The data it collects then helps to build a crowdsourced map of the air quality in your city – and flags up places to avoid.

The problem with adding air-sensing tech to wearable is that generating a reading relies on a number of different components. For example, Flow works by shooting a laser beam from a particulate matter sensor at air particles that enter the device. The light dispersed from them is translated into an electrical current, which is then read by a VOC and NOC sensor.

There are other ways of measuring air quality, but right now packing that kind of tech inside the small body of a smartwatch presents a challenge.

That’s not to say tech brands aren’t trying. In January 2019, the team at Patently Apple spotted an Apple patent for the integration of poisonous gas sensors in both the Apple Watch and iPhone. The patent is mainly aimed at carbon monoxide sensing, which is an odorless gas that can be deadly.

Although most Apple patents don’t make their way to a finished product, this one is interesting because in iteration it could be used as a continuous monitor, as the Flow, but on our wrists. This might be used to help monitor air quality in areas with high pollution levels, but could also be used by certain professions, such as miners who need to be alerted to the presence of poisonous gases.

Last year we explored why blood the pressure is wearable tech’s next big challenge, and how a number of companies are already stepping up to help people identify hypertension.

There are already lots of different smart blood pressure monitors that you can use yourself at home, as well as the Omron Heart Guide wearable, which cleverly adds a blood pressure monitor in the cuff of the smartwatch.

Most blood pressure monitors need to cut off circulation to be able to take a reading, which has made building this kind of tech into slim wearable difficult. As well as that, the upper arm is the gold the standard for measuring blood pressure; the wrist isn’t so effective according to iwatchjr.

But there are other ways to measure blood pressure and Samsung recently launched the Galaxy Watch Active, which uses an optical monitor to measure blood pressure instead – although this tech is yet to receive FDA clearance.

Depending on the success of this type of optical monitor, we might see blood pressure-sensing technology in other devices soon. After all, Fitbit CEO James Park mentioned the development of blood pressure monitoring capabilities as far back as 2015.

And, as you’d expect, Apple has filed a patent for an inflatable blood pressure monitor, while Microsoft has also been exploring the possibilities of adding blood pressure monitoring tech into a head-mounted device.

Biometric authentication

When it comes to unlocking phones, a fingerprint sensor is now commonplace on many major models. But new kinds of sensors that look for different biometric information from our bodies could soon be used to let our wearables identify us – and ensure we're the only ones using them.

Another patent filed by Apple provides details of a wrist biometric sensor that’s located on the inside of a watch band and can read different patterns of skin texture. The sensor that’s proposed in the patent includes a plurality of biometric sensing pixels, which is coupled with a processor to make sense of the skin texture pattern and use it as a form of authentication.

This isn’t the first time Apple has looked into adding biometric sensors for authentication purposes in its wearables. Back in 2015, another patent was filed that covers an identification system based on Plethysmography, which uses light sensors to record changes in the volume of blood.

There’s also been similar research into ways to tell if someone is who they say they are based on the veins in their wrist. A 2016 study proposed a wrist vein sensor that would use near-infrared (NIR) lighting to capture detailed wrist vein images, which researchers found were unique across all subjects.

There are all kinds of authentication sensors being used in other kinds of technology, from gait-sensing to iris scanning. But for biometric authentication to be integrated inside a wearable it needs to be small and ideally sense markers that are present on someone’s wrist, which is why both skin texture and wrist vein images could prove to be useful in the future.

Keeping tabs on glucose levels

The ability to monitor glucose levels from our wrists would make a huge difference to personal health tracking and, if it was accurate enough, the lives of those living with diabetes.

There are already plenty of glucose monitors available for personal use, but the benefits of having a non-invasive, continuous glucose sensor in a wearable would mean you could see, in real-time, the impact sugar intake and exercise have on your glucose levels.

The implications for this would be that you could better, and more instantly, tweak your diet. And, considering diet is a huge part of maintaining a healthy lifestyle, it could be a life-changing metric to have on hand according to iwatchjr.

Most companies that make wearable technology are likely considering whether glucose monitoring is a possibility. Apple was recently granted a patent for technology that sounds similar to non-invasive glucose monitoring and uses a light-based optical sensor to check your blood for glucose.

Fitbit has also made moves into the glucose monitoring space. Firstly, it teamed up with One Drop to bring diabetes management solutions to Fitbit Ionic users. And more recently, it invested $6 million in Sano, a company that’s been developing a small patch that can track your glucose by painlessly reading the interstitial fluid under your skin.

However, one of the biggest challenges of bringing this kind of tech to wearables is that it’s difficult to get a good reading through non-invasive methods on our wrists. This means that even if glucose monitoring comes to our wearables, it might not be accurate enough to help advice on insulin dosage for those with diabetes.

Sweat sensing

According to iwatchjr, sensors designed to take readings from sweat can monitor all kinds of things, including electrolyte levels to help flag dehydration and fatigue in athletes; blood sugar levels to track diabetes risk; or cortisol levels, which can influence emotional stress, metabolism, blood pressure and more.

There are a number of different sensors technologies that can measure sweat, including using an electrochemical sensor that can be fitted into a headband or wristband, as well as patches that are applied directly to the skin. One patch, currently being developed by researchers at Stanford University consists of a membrane that allows the salt found in sweat to pass through then collects and measures the cortisol on the way.

Similar sensors have made their way into wearable devices already. The University of Pennsylvania has used graphene to create the SweatSmart by GraphWear, and companies like LVL and Halo Wearables have also been looking at sweat as a measure of hydration.

Although there don’t seem to be any solid plans for adding sweat sensors to any mainstream wearables, it’s a good way to keep tabs on health for a number of reasons, including the fact that it’s non-invasive offers continuous monitoring and can flag up many physiological conditions. It could be down to the ambitious startups to make the breakthrough in sweat-sensing first, before the major wearable tech companies see the potential.

Many of these sensor technologies could still be a long way off from being added to our wearables, by which point we might have done away with wrist-bound wearables altogether and have moved onto skin sensors or even ingestible. However, Apple’s move into ECG-reading tech last year shows that major wearable companies are dedicated to building new sensors into their devices as soon as the tech allows it, in order to combine data points and build an even more accurate picture of our health.

#iwatchjr #iwatchjr smartwatch #iwatch #sensors #smartphone #SmartWatch

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positronx · 5 years ago

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mmutchler2-blog · 5 years ago

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Blog 4, 1.10.20

Today’s blog post is about reflecting on my time in Italy! We spent roughly one week in Italy, and it was absolutely incredible. My favorite structure by far was the Duomo di Siena (Siena Cathedral) in Siena, Italy [see photo]. I thought the use of red, green, and white marble on this gothic cathedral was stunning and completely different than the classical tan limestone structures we saw in Rome. The inside of the Duomo di Siena was just as beautiful as the outside. The patterned floors of the cathedral were unique [see photo] and I thought it was a clever way to counterbalance the elaborately decorated walls and duomo. My favorite city we visited was Florence, Italy. Though it was quite a walk from our hotel, I truly appreciated the sense of there being a ‘city center’ right near the Florence Duomo. This made it a very enjoyable area to walk around and explore, and it was very interesting to see that the city had grown and flourished while still keeping this important architectural work (and its cultural significance) at the forefront. My favorite moment on the trip was climbing the duomo. We went right around sunset, and I was able to enjoy a view of Florence that I will never forget [see photo]. Because I am slightly afraid of heights, conquering this fear and climbing the duomo made the view all the more worth it! Reflecting on my five goals, I was able to meet roughly half of them. A large goal was to be able to interact with locals by eating and walking around lesser-known places. I thought I did a pretty good job of deliberately avoiding touristy areas for lunches and dinners so I could experience more culturally authentic interactions and meals. One of the best meals I had was at a small restaurant by the MAXXI museum in Rome - it was a quaint little place that appeared to be family-owned. The mother or grandmother seemed to be the head cook, which was fantastic - and she DEFINITELY knew how to make a meal. Another goal of mine was to express my appreciation for architecture by using the terms we learned in our preparatory class. I am happy to report that I remembered the names of all three classical orders when looking at the columns of the Colosseum (Doric, Ionic, and Corinthian) and was able to differentiate the three by looking at their capitals. I also found myself being able to point out interesting features of the structures we have seen to my friends by using architectural language. For example, I pointed out patterns on the spires of the gothic cathedrals we saw in Siena and Milan to friends, and I distinctly remember saying “Wow, look at those flying buttresses!” when our class got to the top of the Duomo di Milano. A goal of mine that I hope to improve on is adding to my architectural sketchbook, so I am hoping I will have more opportunities to draw once we get to France! While I am sad to leave Italy, I am very excited to keep moving forward and seeing more ‘great structures of Europe’!

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ascendingmoon · 8 years ago

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How to Heal with Healing Crystals

Most people become very interested with the use of crystals right off the bat; mostly because of their very diverse beauty and decorative properties. What they might not know is that all crystals have healing properties, and can do very good for yourself if used in the right way. Of course, just having them around can help, but neglecting to cleanse them or be aware of what they truly can do will only limit their potential.

When I’m being asked about healing crystals, most people don’t know where to start or they genuinely just don’t understand how they work. I’ll do my best to create a guide here to help you find a starting point and help you better understand what crystals can do for you.

Crystal Healing

Healing from crystals comes from resonance and vibrations. Crystal healing has been around for thousands of years, and is used in some medical practice today. Some can heal physical ailments, most commonly headaches and swelling, others help bring an inner peace and balance, on a more quiet and sedative vibration. Crystals are piezoelectric, which means that electricity is produced through compression, basically crystals can produce sound/light waves and vibrations. These have been used in many healing techniques globally. Crystals are generally used to treat blockages in the body, to stop or deal with pain, or to create calmness.

There are crystals that can be used for different parts of the body to alleviate stress or pain. For example, for a stomach-related problem, moonstone, citrine, or green fluorite can be of service to that kind of problem. For headaches, try lapis lazuli or amethyst placed on the brow or forehead. Research specifically your need and there is a crystal to help.

Crystals heal on a physical, emotional, mental and spiritual level. They are used to realign energies and bring an internal balance to one’s aura or energy field. They’re used to prevent or remove blockages in one’s aura or chakras.

chak·raˈCHäkrə/

noun

plural noun:

chakras

(in Indian thought) each of the centers of spiritual power in the human body, usually considered to be seven in number.

Crystals for each chakra:

Crown Chakra: clear quartz, selenite, moonstone, howlite, apophyllite Generally white, silver & clear stones.

Third Eye Chakra: amethyst, purple fluorite, lepidolite, purple argonite Generally purple or indigo stones.

Throat Chakra: blue kyanite, blue lace agate, blue calcite, sodalite, angelite, blue chalcedony Generally blue stones.

Heart Chakra: rose quartz, green fluorite, pink tourmaline, pink chalcedony, rhodochrosite, aventurine Generally pink or green stones.

Solar Plexus Chakra: citrine, yellow calcite, yellow jasper, carnealian, yellow/gold fluorite, tiger’s eye, yellow apatite, yellow topaz Generally yellow or gold stones.

Sacral Chakra: carnealian, orange calcite, orange quartz, jasper, amber Generally orange stones.

Root Chakra: black obsidian, smoky quartz, black tourmaline, garnet, black onyx, hematite Generally black, gray or brown stones.

*Obviously more apply to each, but these are just the basic general ones that stimulate each chakra.

By finding which chakra needs the most healing, or which you’d like to heal personally, you must reflect and be honest with yourself to come to a real decision.

Methods for Working with Crystals

Wearing Crystals is probably the most common and the easiest way to work with them, but they must be cleansed more often. Wearing them as a necklace or in a pouch works the best for most people. Crystals are more effective if they are actually touching your skin, so holding them in your hand or wearing them around your neck might be the best way to go here.

Sleeping with Crystals is another common one. Keeping them under your pillow for those that have trouble sleeping, or wish to remember dreams, or have more vivid dreams may be very helpful. Keeping them on a nightstand near your bed is also another way to sleep with them. Amethyst, moonstone and howlite are very effective stones for protection while sleeping, to help with insomnia or trouble sleeping, and to have vivid/prophetic dreams.

Bathing with Crystals is another helpful and common way to heal. Some crystals cannot be put into water though, like moonstone and selenite, because of their natural properties, so be wary and informed on that before ever bathing with them. Some can even become toxic. The basic idea behind bathing with crystals is that your bath water can become more energized by them, thus improving and increasing your healing time.

Crystal Meditation is perhaps the most common next to wearing them. It’s one of the easiest ways to become more attune to your crystal and feel it’s purest energy. By holding the crystal in your hand(s) or in front of you. Breathing gently, letting the air flow in and out of you. Envisioning a ball of energy in front of you or surrounding you depending on what crystal you’re using can be helpful during this process. Make sure you’re in a quiet area preferably alone, with no distractions. Noticeable signs of crystal vibration is throbbing in your hand(s), tingly feeling, heat/warmth, etc.

“With softly focused eyes, look at your crystal. Notice its color, its shape, its weight if you are holding it. Feel its vibrations passing into your hands. Allow yourself to wander within the crystal, exploring its inner planes. When you are ready, close your eyes. Quietly contemplate the energies of the crystal and let it teach you about itself.” – The Crystal Bible, Judy Hall

How to Cleanse Crystals

Put them out under the full moon, new moon, or under any phase you’d like or intuitively feel is right for them. Paying attention to the moon’s phases will help you better decide on what time is right to charge which crystal, depending on the traits of it and what you will be using them for. If you don’t want to or can’t leave them out overnight, 5-15 minutes is okay too. If you cannot actually see the moon, but it’s full, your crystals will still get the energy and be charged. Even if it is cloudy, rainy, etc. The full moon is the best, most effective time and safest way to cleanse any crystal. Sunlight is cleansing too, but certain crystals cannot be left out in sunlight or they will fade. Examples of these crystals are: Amegreen, Amethyst, Ametrine, Apophyllite Green, Aquamarine, Auralite, Celestite, Citrine, Fluorite, Hiddenite, Kunzite, Opal (will dry out), Prasiolite, Rose Quartz, Smoky Quartz, Spirit Quartz, Super Seven, Topaz, and Turquoise.

Some crystals do not even need to be cleansed at all, these are Citrine and Kyanite. Sometimes you can even use other crystals to cleanse others, like Amethyst and Clear Quartz.

Alternative methods of cleansing are: rainwater. Place your crystal(s) in a bowl and let them sit outside when it’s raining or during a storm. The ionic charge cleanses crystals very quickly and efficiently. Ocean water works well too. Let them air dry. Hold the crystal(s) in your dominant hand and channel your energy through to the crystal to charge it. 5-10 minutes should be good. Like I mentioned earlier: some crystals cannot be used in water, so be informed. Place them in a garden/where you keep your plants, or resting on the soil with the plant(s). 2-4 hours should be good.

Sage and incense. Hold your crystal to the smoke and let it bathe in it. Use your intuition to be able to know when they are done. You’ll just know.

It is ideal to charge and program (getting it attune to you, it’s purpose and universal need) as soon as you get the crystal. It will remove any strangers energy from it and make it yours only. Programming a crystals means to establish its use into the universe. You will decide what you want this crystal to do for you and how it will benefit you. Intuition is key here.

Where can I buy them?

Googling local metaphysical or crystal shops will give you an idea of where to look in your area. If there are none around you, the most authentic and safe online places to look are Etsy.com and Ebay.com. Please avoid shopping for crystals on websites like amazon. Looking around on Instagram for sellers and crystal enthusiasts is also another really good way to purchase some crystals of your own.

________________________________________________________________________

It’s important to do your own research on crystals you’re interested in buying before purchasing them. Learn what you need to improve or balance within yourself and go from there.

Recommended websites/books for crystal information:

http://www.healing-crystals-for-you.com/healing-stone-meanings.html

The Crystal Bible by Judy Hall

Change Your Energy by Krista N. Mitchell

#mine #healing crystals

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i4technolab · 3 years ago

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