درخت حوزه‌های تخصصی

We are currently the beneficiaries of the aspirations of our predecessors, who ardently pursued ideals such as safety, access to quality medical care, social justice, and an effective life. Significantly, and particularly pertinent to our discussion here, we have been granted the power of expression. In today's world, virtually anyone can articulate their views on a wide spectrum of social and political subjects. This fundamental right has been so comprehensively realized that even various unelected authorities have been compelled to devise alternative methods to suppress the freedom of speech. On a theoretical level, one might assume that everything is ideally aligned with the visions of our forebears. However, practical reality paints a more ambiguous picture. Some scholars have employed the somewhat disparaging term "slacktivism" to argue that the impact of online engagement in the public sphere may not be as transformative as initially anticipated. While individuals undoubtedly possess the means to voice their opinions, the question arises as to whether online activism has produced substantial change. In this scholarly inquiry, we undertake a critical examination of the efficacy of activism through social media channels and explore strategies for maximizing its potential.

Getting highly accurate output in biomedical data processing concerning biomedical signals and images is impossible because biomedical data are generated from various electronic and electrical resources that can deliver the data with noise. Filtering is widely used for signal and image processing applications in medical, multimedia, communications, biomedical electronics, and computer vision. The biggest problem in biomedical signal and image processing is developing a perfect filter for the system. Digital filters are more advanced in precision and stability than analog filters. Digital filters are getting more attention due to the increasing advancements in digital technologies. Hence, most medical image and signal processing techniques use digital filters for preprocessing tasks. This paper briefly explains various filters used in medical image and signal processing. Matlab is a famous mathematical, analytical software with a platform and built-in tools to design filters and experiment with different inputs. Even though this paper implements filters like, Mean, Median, Weighted Average, Guassian, and Bilateral in Python to verify their performance, a suitable filter can be selected for biomedical applications by comparing their performance.

The conflict between the Akhbārīs and Uṣūlīs dates from the time of Mawlá Muḥammad Amīn Astarābādī (d. 1033/1624). However, limited usage of the two terms can be traced back to before that period. Kitāb al-Naqḍ , written by ʿAbd al-Jalīl Qazwīnī Rāzī (d. 560/1165), is one of the few Imāmī sources that contains a group of references to a similar conflict between the Shiʿa Uṣūlīyyah and Shiʿa Akhbārīyyah. The former term, in particular, repeatedly appears in the book. The aim of this paper, adopting a conceptual approach to history, would be to demonstrate that the Akhbārī/Uṣūlī terms in medieval Iran do not refer to a legal concept, nor to the dispute between the moderate/extremist Shiʿis in that context. Despite the first impression which the term conveys, it will be suggested that the term “uṣūlīyyah” does not have its roots in uṣūl al-fiqh (Islamic legal methodology), but rather, refers to some specific rational uṣūl (principles) usually applied to uṣūl al-ʿaqāʾid (Islamic theological principles). That is, “uṣūlīyyah,” according to Qazwīnī, refers to those whose religious knowledge has been based on rational principles. However, the Akhbārī-Uṣūlī terminology introduced by Qazwīnī cannot be paired with the historical Shiʿi schools and figures of his period. If we consider the social and political pressures under which Iranian Imāmīs were living, it will appear that employment of such terms has had a strategic purpose. In this case, calling most of his contemporaries “uṣūlīs,” and attributing controversial Shiʿi beliefs to the Akhbārīs, Qazwīnī has attempted to exonerate Imāmīs from their accusations, and to improve their social position.