digital filters
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2022 ◽  
Author(s):  
Rio Rovando Rindengan

Instagram, which is usually abbreviated as IG, is a photo and video sharing application that allows users to take photos, take videos, apply digital filters, and share them on various social networking services, including Instagram's own. One unique feature on Instagram is cropping photos into square shapes, so they look like the results of Kodak Instamatic and Polaroid cameras. This is different from the 4:3 or 16:9 aspect ratio that is commonly used by cameras on mobile devices. Instagram can be used on any iPhone, iPad or iPod Touch version with the iOS 7.0 operating system or later, any Android mobile phone with the operating system version 2.2 (Froyo) and above, and Windows Phone 8. This application can be downloaded via the Apple App Store and Google Play. On April 9, 2012, it was announced that Facebook had agreed to take over Instagram for approximately $1 billion. Instagram was first released on October 6, 2010, 11 years ago, the name Instagram Instagram comes from the understanding of the overall function of this application. The word "insta" comes from the word "instant", like the polaroid camera which at that time was better known as "instant photo". Instagram can also display photos instantly, like a polaroid in its display. As for the word "gram" comes from the word "telegram" which works to send information to others quickly. Similarly, Instagram can upload photos using the Internet, so the information you want to convey can be received quickly. That's why Instagram is an extension of the words instant and telegram. On April 9, 2012, it was announced that Instagram would be taken over by Facebook for nearly $1 billion in cash and stock. On May 11, 2016, Instagram introduced a new look as well as a new icon and new app design. Inspired by previous app icons, the new icon is a simple camera and a vivid rainbow in the form of a gradient. There are 5 sandal vendors in Indonesia that use Instagram accounts as a marketing platform, namely:


2022 ◽  
Author(s):  
Sayid abdul rohman hakim

ABSTRACTInstagram is a photo and video sharing social media application that allows users to take photos, take videos, apply digital filters, and share them on various social networking services, including Instagram's own. In Indonesia, the number of Instagram users until July 2021 is 91.77 million users. The largest users are in the 18-24 year age group, which is 36.4%. Instagram is the third most used social media platform, after YouTube and WhatsApp. The large number of Instagram users in Indonesia, provides a great opportunity for brands to make Instagram a marketing medium. There are 5 mobile phone brands in Indonesia that use Instagram as a marketing platform, namely: Vivo Indonesia, Oppo Indonesia, Apple, Samsung Indonesia, and Xiaomi Indonesia. The purpose of this study is to calculate the credibility of the Instagram account performance of the 5 Best Selling Mobile Brands in Indonesia. The method used for this research is quantitative exploratory method. The results of this study indicate that the smartphone vendor Oppo Indonesia is ranked first and has good account performance credibility.


2022 ◽  
pp. 348-367
Author(s):  
Hamid Bentarzi

This chapter presents how root cause analysis based on fault tree technique can be used to study mal-operation of protective relay in a smart power grid. This approach is used to identify disturbances first and root cause of mal operation of protective relays which may lead to unnecessary tripping and hence to blackout. Once the critical root causes are identified, mitigation measures first such as blocking protection functions and digital filters may be used in view of increasing the reliability of the considered protection system. The proposed approach has many advantages as it allows obtaining an important quantitative figure (security). These permits to strongly strengthen the elements of the protecting system which are most likely appropriate to failure and hence the impact on the overall system's cost is significant. Another main advantage is that it takes into account the reliability of the software part of the system which is considered to have a significant contribution in the overall reliability of the protecting system.


2022 ◽  
Vol 200 ◽  
pp. 117630
Author(s):  
Guoqiang Liu ◽  
Tong Xiong ◽  
Gang Yan ◽  
Jianlin Yu

2021 ◽  
Author(s):  
Yonatan Aguirre ◽  
Flabio Gutierrez ◽  
Richard Abramonte ◽  
Nilthon Arce ◽  
Antenor Aliaga

The accurate measurement of RMS values of voltage and current is crucial for the monitoring and protection of power systems and in general for electrical power distribution systems. The authors in this paper have developed an algorithm to calculate the RMS value of sinusoidal signals of varying frequency, by applying phasors obtained from digital filters SAL and CAL. In conditions in which the frequency of the grid varies, a phase shift is presented in the phasor of the grid voltage which is used for the design of a regulator that allows to obtain accurate RMS voltage values. The choice of the SAL and CAL digital filters is due to their low computational requirement, so they can be implemented in general-purpose microcontrollers.


Author(s):  
Vladimir Semenov ◽  
Aleksandr Shurbin

The wavelet transform is the transmission of a signal through a bandpass filter. The design of wavelets with a rectangular amplitude-frequency response makes it possible to obtain almost ideal digital filters. The wavelet transform is calculated in the frequency domain using the fast Fourier transform.


Author(s):  
Valeriy Zaycev ◽  
Alalvan Kasim

A physically justified method of synthesis of nonlinear oscillating systems oscillating in discrete time (DT) is proposed. Synthesized dynamic systems are used as nonlinear discrete (digital) filters and basic models of radio system elements.


2021 ◽  
Author(s):  
Anak Agung Gde Bagus Sujana Rum

Instagram is a social network that was born from a company called Burbn, Inc. which was founded on October 6, 2010. The company was founded by Kevin Systrom and Mike Krieger who currently serve as CEOs of Instagram. Instagram is a photo and video sharing application that allows users to take photos, take videos, apply digital filters, and share them on various social networking services owned by Instagram itself. One of the unique features on Instagram is that it looks like a photo into a square shape, so you can see the results of the Kodak Instamatic and Polaroid cameras. This study aims to determine the ratios contained in social media Instagram. These ratios can later be used to perform analyzes that can be determined mathematically. The research method used is exploratory to find the variables contained in Instagram. These variables will be tested, so that relevant ratios can be found to be used to assess the performance of an Instagram account. The results of this Instagram social media research show that 14 ratios that can be used to assess, measure and compare come from an Instagram account. The implication of finding this ratio is that further researchers can conduct quantitative research in measuring, assessing and comparing accounts on Instagram.


MAUSAM ◽  
2021 ◽  
Vol 47 (3) ◽  
pp. 237-250
Author(s):  
K. ROY ABRAHAM ◽  
S. K. DASH ◽  
U. C. MOHANTY

In this study a number of sensitivity experiments have been conducted with different types of orography in the ECMWF spectral General Circulation Model (GCM). The basic aim is to simulate the large scale features of the Indian summer monsoon and the movement of cyclones. Different types of digital filters have been used to represent the orography as close to the observed values as possible. A comparative study shows that the Lanczos filter gives the best results. Thus, the Lanczos filter has been used in subsequent sensitivity experiments. One cyclone over the Bay of Bengal during pre-monsoon month of May, and another during the must active month of August have been selected for numerical experiments. The large scale features of the monsoonal rainfall were found to be close to those observed, when  standard deviation envelope orography was used. After 3 days of model integration, the rainfall distribution improved compared to the initial stages of integration. Although the predicted cyclone followed the observed track, the rate of movement was very sluggish. There was slight deepening of the systems with an increase of orography The movement of the systems was also found to be slightly faster with the enhancement of orography.    


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