This blog post clearly examines the technical differences between optical and capacitive fingerprint recognition, explaining how each utilizes light and voltage differences to distinguish ridges and valleys. As information and communication technologies rapidly advance and services utilizing them become deeply embedded in daily life, incidents of personal information leaks and identity...
This blog post delves into how spectral reflectance, which varies by wavelength, serves as a key clue for identifying the composition and state of the Earth’s surface. It focuses on the principles and applications of remote sensing. Numerous satellites orbiting Earth carry various imaging sensors capable of detailed observation of the surface. Developed primarily for military...
This blog post examines the limits of the cognition-fact comparison faced by the classical concept of truth, clearly outlining how the structure of infinite regress Kant described connects to our conditions of cognition. According to the classical formulation popularized by Thomas Aquinas, ‘truth’ is understood as ‘the agreement of things with the intellect,’ a concept whose origins can...
This blog post examines the specific mechanisms by which weather alters various voter burdens—such as travel inconvenience, information costs, and leisure activity choices—ultimately increasing or decreasing voting participation. Explanations of voting participation focus on the costs voters incur to participate. For instance, the closer a polling station is to a voter’s residence or...
This blog post examines the principles and mechanisms of photodynamic therapy, where light, photosensitizers, and oxygen interact to target specific cells, providing a detailed explanation of how selective cell death occurs. In the early 20th century, pharmacologist Tapiner accidentally observed that protozoa stained with leucoacridine dye died when exposed to lightning. He then confirmed...
This blog post examines why market prices cannot fully capture social value due to externalities and the limitations of payment capacity, and discusses how these distortions impact modern society’s norms and resource allocation. Classical economists advocated an objective theory of value, asserting that prices are determined by the amount of labor expended in producing goods. This...
This blog post examines how the sentimentalist perspective interprets and reconstructs David Hume’s theory of moral judgment, analyzing how the boundary between sentiment expression and factual description emerges as a central issue in moral philosophy. Hume’s claim that deontic propositions cannot be derived from existential propositions has profoundly influenced modern moral...
This blog post examines how the concept of ambivalence, central to decolonial theory, fractures the archetypes within colonial literature and disrupts the identities of both colonizers and colonized, offering a more multidimensional understanding of its significance. Ambivalence is one concept that has sparked significant debate in recent decolonial literary studies. Originally a...
In this blog post, we examine the limitations of spam email regulation methods and the structural problems inherent in each system. We explore how to find a balance between freedom of expression and the protection of personal rights. Spam emails refer to mass, repetitive commercial advertising emails sent for profit. Most spam emails contain harmful pornographic material or deceptive...
This blog post explores the principles behind maintaining watermarks embedded in digital photos during editing and compression, along with the technical characteristics applied in the spatial and frequency domains. Digital watermarking refers to the technology of invisibly embedding specific identifiers, or watermarks, into digital photos. The embedded identifier can be extracted through...