Sentiment analysis in low-resource, culturally nuanced contexts challenges conventional NLP approaches that assume fixed labels and universal affective expressions. We present a diagnostic framework that treats sentiment as a context-dependent, culturally embedded construct, and evaluate how large language models (LLMs) reason about sentiment in informal, code-mixed WhatsApp messages from Nairobi youth health groups. Using a combination of human-annotated data, sentiment-flipped counterfactuals, and rubric-based explanation evaluation, we probe LLM interpretability, robustness, and alignment with human reasoning. Framing our evaluation through a social-science measurement lens, we operationalize and interrogate LLMs outputs as an instrument for measuring the abstract concept of sentiment. Our findings reveal significant variation in model reasoning quality, with top-tier LLMs demonstrating interpretive stability, while open models often falter under ambiguity or sentiment shifts. This work highlights the need for culturally sensitive, reasoning-aware AI evaluation in complex, real-world communication.

In this article I will explain how we can use Face Recognition and then send the mail and whatsapp message. Further if other face detected then we create EC2 instance in AWS! The Local Binary Pattern Histogram(LBPH) algorithm is a simple solution on face recognition problem, which can recognize both front face and side face. The gray value of the pixel is replaced by the median value of its neighborhood sampling value, and then the feature value is extracted by the sub blocks and the statistical histogram is established. As we have an image in grayscale, each histogram (from each grid) will contain only 256 positions (0 255) representing the occurrences of each pixel intensity.

WhatsApp has introduced major new changes that are intended to stop people spreading messages so easily. The update is intended to stop the spread of false stories, bad advice and misinformation about the coronavirus outbreak as well as more generally. The feature might initially appear strange for a social network, which usually encourage easy ways of forwarding on messages and increase the reach of more popular posts. But WhatsApp has said the feature is specifically intended to "constrain virality", to keep the app "personal and private" as well as looking to slow the spread of hoaxes and rumours. What do the new rules mean?

WhatsApp's recently introduced security feature could be the key to keeping secret messages safe and secure. The company recently unveiled biometric tools in the iPhone version of the app which mean that the phone will check you're the right person before allowing you in. The setting means that you can only open WhatsApp if you have the right fingerprint or face, just like when you unlock your phone. It means that anyone who shares their phone around or is likely to have it unlocked can keep messages secret, even if other apps aren't locked up. The feature involves a slight trade-off: it's much harder for anyone to get into your chats, but it's also a little harder for you to do so, too.

WhatsApp has improved the security for its app by introducing an extra layer of protection for privacy-conscious users. The latest update for the popular messaging app allows people to restrict access using biometric technology. Version 2.19.20 of WhatsApp will include the new security feature for users of the iOS app, meaning iPhone owners can restrict access to the app using either Face ID facial recognition or Touch ID fingerprint security. The feature was first reported last month by the WeBetaInfo website, who spotted the update in an unreleased version of the app. Its roll out on the iOS app was then spotted by unofficial Apple news site 9to5Mac.

WhatsApp, the popular messaging apps acquired by Facebook for $19 billion in 2014, has been adding new features on a regular basis. As of January 2018, WhatsApp was hitting 1.5 billion monthly users who are sending 60 billion messages per day. While WhatsApp seems like a basic and simple instant message application, it has a number of interesting and sophisticated features. WhatsApp allows you to back up your chat conversations and media using a cloud storage service so that you can restore the content again when you switch devices. You can set this up so it backs up automatically every day, every week or every month. This feature can be found under Settings Chats Chat Backup Auto Backup. WhatsApp backs up with iCloud on iOS and Google Drive on Android.

WhatsApp now lets Siri read your messages aloud and even reply to them without you having to press a button. All users have to do it say'Hey Siri, read my last WhatsApp message' and it will dictate your outstanding notifications, the content of the message with information about who sent them. This means you can access your contacts remotely - although not everyone might like the idea of their messages being read out in public. In the latest update to the chat app users running Apple's iOS 10.3 software will be able to access your messages hands-free by getting Siri to read them out (stock image) The latest update works for users running on iOS 10.3. Users can use voice dictation to compose and receive outstanding notifications.

A new update for WhatsApp on iOS will make iPhone users' life easier -- users with iOS 10.3 on their iPhone can get Siri to read out their WhatsApp messages. WhatsApp version 2.17.2 for iOS let you use the new feature by just saying, "Hey Siri, read me my last WhatsApp message." The feature works only with unread messages, so messages you have read once, won't be re-read by Siri. The feature will allow people to go hands free easily -- say, if your phone is connected to the car's infotainment system, but you want to listen to your WhatsApp messages while driving, you will now be able to do that with a simple voice command. The feature has been in the works for some time.

Apple's Siri assistant may not boast as many third-party integrations as Amazon Alexa and Google Assistant, but it's still useful in its own right. Since the company opened up the platform last year, major apps have tapped into the platform, allowing iPhone and iPad users to perform tasks completely hands-free. WhatsApp, for example, has allowed users to send texts using their voice since September, but as part of its latest update, Apple's assistant can read messages aloud too. Once the app has been updated, a simple "Hey Siri, read my last WhatsApp message" request will have Siri dictate the most recent text. It'll no doubt help keep friends and family updated on the latest group chat happenings, but it will also promote vehicle safety by keeping eyes on the road and hands on the wheel.

WhatsApp has a gaping secuirty hole in the middle of its app. But it can be easily fixed. An issue with the way that the app deals with the security keys central to its encryption mean that people can actually spy on messages, one security researcher has found. End-to-end encryption is intended as a way of ensuring that messages can only be read by the sender and their intended recipient, but the encryption keys that power that technology can be a weak link if tehy are wrongly used. WhatsApp's implementation of end-to-end encryption – which is a large part of the company's focus on privacy and security – uses the widely-respected Signal protocol.