The author of this essay deals with the specificity of sociology in Poland, reaching for the book of Antoni Sułek A Mirror on the High Road. Chapters from the History of Social Research in Poland (2019). Chapters of this book taken as a set constitute a review of the key issues that Polish sociologists strived to tackle in the 20th century. For approximately half of the book (6 chapters) Sułek focuses on issues of Polish sociology from the mid-1950s to the turn of the 1990s: the first is the change of theoretical and methodological paradigms in Polish sociology in the second half of the 20th century; the second is the successes of Polish sociology, but also its weaknesses—the author devoted much space to the theoretical limitations that prevented sociologists from predicting the formation of Solidarity in 1980. The third topic is the historical analysis of surveys conducted in the last decade of communism—their reliability as well as social and political functions. Finally, Sułek’s vision of socially-involved sociology appears. The strength of such sociology lies in its methodology, with which specific phenomena can be correctly defined, impartially analysed, and systematically investigated. And this in turn enables evidence-based debate and policy.

Recent years have witnessed the publication of a number of research papers and books seeking to assess threats of electoral victories of anti-establishment politicians and political parties, described as authoritarian populists. This essay focuses on three books directly addressing the origins and threats of authoritarian populism to democracy. It consists of six sections and the conclusion. The first section presents findings (Norris and Inglehart) based on surveys of values of voters of various age cohorts concluding that authoritarian populism is a temporary backlash provoked by the post-materialist perspective. The second section examines the contention, spelled out in Levitsky and Ziblatt, that increase in openness of American political system produced, unintentionally, a degradation of the American political system. The third section continues brief presentations focusing on to the causes and implications of “illiberal democracy,” and “undemocratic liberalism” (Mounk). The fourth section examines developments in the quality of democracy in the world showing that despite the decline in Democracy Indices, overall there was no slide towards non-democratic forms of government in 2006–2019. The next two sections deal with dimensions missing in reviewed books; the notion of nation-state, international environment, civic culture and, in particular, dangers of radical egalitarianism to democracy. The last section concludes with regrets that the authors ignored rich literature on fragility of democracy and failed to incorporate in their analyses deeper structural factors eroding democracy: by the same token, return to the pre-populist shock trajectory is unlikely to assure survival of liberal democracy.

The article presents Charles Taylor’s critical philosophy of language and it reviews his recent book on the human linguistic capacity. Critical philosophy of language is understood here as a broad (philosophical, social and political) perspective on language characterized by multifaceted concern with the linguistic and cognitive mechanisms involved in language use. The paper discusses Taylor’s interest in language and philosophy of language, and focuses on his seminal distinction between the ‘designative-instrumental’ and ‘constitutive-expressive’ theories of language. In the former theory language is understood within the confi nes of Cartesian representational epistemology, whereas in the latter language constitutes meaning and shapes human experience (one of the features important for defi ning the critical approach to philosophy of language).

The review includes results of analyses and research aimed at standardizing the concepts and measurement procedures associated with photodetector parameters. Photodetectors are key components that ensure the conversion of incoming optical radiation into an electrical signal in a wide variety of sophisticated optoelectronic systems and everyday devices, such as smartwatches and systems that measure the composition of the Martian atmosphere. Semiconductor detectors are presented, and they play a major role due to their excellent optical and electrical parameters as well as physical parameters, stability, and long mean time to failure. As their performance depends on the manufacturing technology and internal architecture, different types of photodetectors are described first. The following parts of the article concern metrological aspects related to their characterization. All the basic parameters have been defined, which are useful both for their users and their developers. This allows for the verification of photodetectors’ workmanship quality, the capabilities of a given technology, and, above all, suitability for a specific application and the performance of the final optoelectronic system. Experimentally validated meteorological models and equivalent diagrams, which are necessary for the correct analysis of parameter measurements, are also presented. The current state of knowledge presented in recognized scientific papers and the results of the authors’ works are described as well.

The electrical network is a man-made complex network that makes it difficult to monitor and control the power system with traditional monitoring devices. Traditional devices have some limitations in real-time synchronization monitoring which leads to unwanted behavior and causes new challenges in the operation and control of the power systems. A Phasor measurement unit (PMU) is an advanced metering device that provides an accurate real-time and synchronized measurement of the voltage and current waveforms of the buses in which the PMU devices are directly connected in the grid station. The device is connected to the busbars of the power grid in the electrical distribution and transmission systems and provides time-synchronized measurement with the help of the Global Positioning System (GPS). However, the implementation and maintenance cost of the device is not bearable for the electrical utilities. Therefore, in recent work, many optimization approaches have been developed to overcome optimal placement of PMU problems to reduce the overall cost by providing complete electrical network observability with a minimal number of PMUs. This research paper reviews the importance of PMU for the modern electrical power system, the architecture of PMU, the differences between PMU, micro-PMU, SCADA, and smart grid (SG) relation with PMU, the sinusoidal waveform, and its phasor representation, and finally a list of PMU applications. The applications of PMU are widely involved in the operation of power systems ranging from power system control and monitor, distribution grid control, load shedding control and analyses, and state estimation which shows the importance of PMU for the modern world.

Reviewing the current state of knowledge on sustainable production, this paper opens the Special Section entitled “Sustainability in production in the context of Industry 4.0”. The fourth industrial revolution (Industry 4.0), which embodies a vision for the future system of manufacturing (production), focuses on how to use contemporary methods (i.e. computerization, robotization, automation, new business models, etc.) to integrate all manufacturing industry systems to achieve sustainability. The idea was introduced in 2011 by the German government to promote automation in manufacturing. This paper shows the state of the art in the application of modern methods in sustainable manufacturing in the context of Industry 4.0. The authors review the past and current state of knowledge in this regard and describe the known limitations, directions for further research, and industrial applications of the most promising ideas and technologies.