Günlük yazıyor musunuz?

Reading Time: 1 minute İlkokul zamanıydı, öğretmenimiz hepimizden bir defter almasını ve bunu günlük olarak kullanmamızı istemişti. O zamanlar buna anlam veremesem de, “Sevgili günlük” kelimeleriyle başlayan 100lerce sayfa yazı yazmıştım. Daha sonra ilerleyen yıllarda da zaman zaman günlük tutma ihtiyacı hissettim. Şimdi ise, dijitalleşen dünyada kağıdın yerini tabletlerin aldığı günümüzde tabi ki günlüğün de dijital versiyonu çıkmasaydı şaşırırdık. Aslında ben çok geç keşfetmişim Penzu uygulamasını, 2008 yılından beri faaliyet gösteren Kanada çıkışlı bir şirketmiş . Topladıkları 100 binlerce yazı verisiyle ne tür Read more…

Halkı Kültür Sanatla Beslemek

Reading Time: 1 minute İtalya’da yaşamanın en güzel yanlarından biri her ayın ilk pazar gününde müzelerin tüm ziyaretçilere ücretsiz olması. Bu sayede genci yaşlısı herkes Pazar gününü dolu dolu geçirebiliyor. Özellikle bugün gördüğüm insan profilleri beni oldukça düşündürdü. Mesela 20’li yaşlardaki sevgilileri de, 60’lı yaşlardaki teyzeleri amcaları da müzedeki tabloları dikkatle incelerken gördüm. İşte İtalya’daki bu uygulama, bir idari kararın (muhtemelen Kültür Bakanlığı’nın) toplumu ne kadar olumlu etkilediğine dair en güzel örneklerden biri. Türkiye’de buna benzer bir uygulama yapmak neden olmasın ki? Bu Read more…

Protect your WordPress site against DDOS and bruteforce attacks, and other security issues

Reading Time: 2 minutes While checking the web analytics logs of my website, I discovered that there are too many bruteforce attack attempts originated from Brasil and France. Until today, I was just using Akismet Anti-Spam to prevent spam comments but it wasn’t enough. Then, I found a solution by adding new security plugins that are already used by 100K+ WordPress users. To be honest, I am really surprised that I’ve just met with this problem. Here, there is a list of the Read more…

How do we measure the correlation of time series? Pearson correlation analysis

Reading Time: 3 minutes When you discover that your time series have the similar trend, you may want to measure how much are they correlated. In that case, the Pearson correlation coefficient is one of the most widely used metric. It is widely used in the sciences. It was developed by Karl Pearson from a related idea introduced by Francis Galton in the 1880s. Pearson’s correlation coefficient is the covariance of the two variables divided by the product of their standard deviations. (Source: Read more…

Topic Discovery – Latent Dirichlet Allocation

Reading Time: 1 minute Topic discovery is an important research area, and one of the most important algorithms used in this field is Latent Dirichlet Allocation, which is an unsupervised learning algorithm based on statistics, and its inventor is Columbia University Professor David M Blei. In his research paper published in 2013 (click to view the paper), he gives the details of the algorithm. (He is the co-author with Andrew Ng and Michael I. Jordan) Until today, many variations of the algorithm are Read more…

Privacy-first onsite Data Analysis for Facebook apps

Reading Time: 1 minute I was thinking in this morning, especially after the last Cambridge Analytica scandal on Facebook, that there should be a new kind of privacy-first data analysis process in Facebook without sharing the data with external companies. In the current system, the flow is: the user accepts permission request of the application, and the app owner is collecting the data on its own platform and doing analysis on it, selling it to another firm, etc… Instead, the data analysis task Read more…

Comparison of two face recognition software: Clarifai and Face++

Reading Time: 2 minutes Recently, I tried several products to extract demographic information from a profile image. My target was to obtain information about age, gender, and ethnicity. I found the prominent companies in the sector are Clarifai and Face++. I integrated my trial software with both products and I found Clarifai’s accuracy better than Face++. My reasons are: Clarifai provides the probability value of its predictions. (predicted gender is female with a probability %52) So, it is possible to eliminate the results Read more…

Converting texts to high-res images

Reading Time: 1 minute A very inspiring research is made at the end of 2016. With the help of deep learning, now it is possible to generate images from given texts. Here is the link to the news and here is the link to that research paper. Could you imagine some use cases based on this technology? I found an interesting use case.. Imagine you are in a police station, about a robbery occurred in a bank… The thief could not be found Read more…