Blind Drift Research Articles

Mine auxiliary fan in the form of an intelligent mechatronic module

Introduction. High-quality ventilation of underground workings is an important condition for safe and accident-free mining. Research on aerological situation control in work areas is ongoing, but the problem of creating reliable adaptive ventilation systems for shafts and mines remains urgent despite the progress made. In course of excavation, the system of workings on the horizon develops a highly complex structure. Auxiliary ventilation is often the only way to achieve high-quality air exchange in the working area. Methods of research. To continuously provide the working area with an estimated amount of fresh air, as well as to intensify ventilation if the concentration of toxic contaminants is increased, mine auxiliary fans (MAF) are used. The best way to improve MAF environmental and economic efficiency is to automatically control the fan capacity. Results and analysis. The program embedded in the programmable logic controller (PLC) provides for comparing the transmitters readings and the aerological situation allowed by the parameters as well as making a decision on changing the fan capacity. If the change is required, the PLC sends an appropriate command to the controller to adjust the fan engine speed. The MAF scheme is simplified if the blind drift is straight because the transmitter is in the line of sight of the receiver and there is no need for a repeater. The UMP design is of a minimal complexity when the mine working is straight and the control task is limited to ensuring constant air flow supplied to the bottom-hole zone. Out of all the data devices, only the flow transmitter remains in the circuit, while the repeater and PLC are excluded. It should also be noted that during the entire period of tunneling, the fan of an unregulated MAF creates an excess power consumption, therefore consuming more electricity than the fan of an intelligent mechatronic module (IMM). Conclusions. Conversion of MAF to IMM will provide the required amount of fresh air to the bottom-hole zone increasing the safety of miners. Real-time control of IMM capacity will significantly reduce energy consumption and create favorable conditions for optimizing ventilation according to the “price-quality” criterion.

VENTILATION METHOD FOR LONG BLIND DRIFTS WITH LONGITUDINAL BAFFLES

The study focuses on aerodynamic processes in long blind drifts ventilated owing to ejection effect generated thanks to construction of longitudinal baffles. The numerical modeling of air distribution at the junction with a blind drift with a longitudinal baffle is implemented in ANSYS. The change in the local air drag in case of forward and reverse air flows is shown. The velocity variation in air flow in a long blind drift with adjustment of ventilation efficiency by alteration of the opening angle of the longitudinal baffle flap is estimated. Based on the obtained results, the author shows that construction of longitudinal baffles allows efficient ventilation in long blind drifts owing to the ejection effect, without forced ventilation arrangement.

Merging Dugger’s Concepts with O’Hara’s Principles to Advance Social and Institutional Economics

The purpose of this paper is to situate, reconstruct, summarise and provide some research guidelines for advancing the scientific study of William M. Dugger’s concepts of social and institutional economics. We start by examining the nature of Dugger’s concepts and how we can dissect Dugger’s concepts with the aid of Phillip O’Hara’s principles. Then in the bulk of the paper we, firstly, contextualise these Duggerian concepts that have a direct bearing on the rule or principle of (A) Historical Specificity and the temporal dimensions of socioeconomic processes: including the concepts of realism; historical time; evolution; blind drift; plus the community’s joint stock of knowledge. Secondly, we scrutinise those concepts that link directly to the principle of (B) Circular and Cumulative Causation: concepts of interdependency, amplified dynamics, and virtuous and vicious cycles and uneven developments. Thirdly, we examine those Duggerian concepts that are associated with the principle of (C) Heterogeneous Groups and Agents: equality, gender, ethnicity, class, nationality and enabling myths. This is followed, fourthly, by a discussion of those concepts that link to the principle of (D) Contradictory Processes in the social and political economy: Dugger’s concepts of power; hegemony; vested interests versus the common good; instrumental and ceremonial functions of institutions; emulation and conspicuous consumption; plus vesting, entrenching and faking. Fifthly, the principle of (E) Ethics and Policy is correlated with the Duggerian concepts of social provisioning; participatory democracy; democratic planning; and abundance. A conclusion follows with some ideas for future research on these principles and concepts of social and institutional economics.

A Deep Learning Approach for Blind Drift Calibration of Sensor Networks

Temporal drift of sensory data is a severe problem impacting the data quality of wireless sensor networks (WSNs). With the proliferation of large-scale and long-term WSNs, it is becoming more important to calibrate sensors when the ground truth is unavailable. This problem is called "blind calibration". In this paper, we propose a novel deep learning method named projection-recovery network (PRNet) to blindly calibrate sensor measurements online. The PRNet first projects the drifted data to a feature space, and uses a powerful deep convolutional neural network to recover the estimated drift-free measurements. We deploy a 24-sensor testbed and provide comprehensive empirical evidence showing that the proposed method significantly improves the sensing accuracy and drifted sensor detection. Compared with previous methods, PRNet can calibrate 2x of drifted sensors at the recovery rate of 80% under the same level of accuracy requirement. We also provide helpful insights for designing deep neural networks for sensor calibration. We hope our proposed simple and effective approach will serve as a solid baseline in blind drift calibration of sensor networks.

Public Policy Adrift: Veblen’s Blind Drift and Neoliberalism

This paper considers the factors that currently shape and direct public policy formation in the United States. The paper begins by articulating the general position of institutionalists with regard to the purpose of public policy analysis and formulation. Next, a discussion of Thorstein Veblen’s view is presented focusing on his rejection of meliorative tendencies in the economy and the meaning of his concept of blind drift as applied to the likely direction of ongoing social processes. Then, we explore a contemporary analysis of the belief in the role of meliorative trends in contemporary social and economic policy analysis and discussions by James K. Galbraith. Then, we examine Philip Mirowski’s recent analysis of the shaping of the direction of public policy debate by what he refers to as the neoliberal thought collective as a mitigating factor to the blind drift suggested by Thorstein Veblen.

Air flow phenomena in the model of the blind drift

In the presented paper, Particle Image Velocimetry (PIV) has been used to investigate flow pattern and turbulent structure in the model of blind drift. The presented model exist in mining, and has been analyzed to resolve ventilation issues. Blind region is particularly susceptible to unsafe methane accumulation. The measurement system allows us to evaluate all components of the velocity vector in channel cross-section simultaneously. First order and second order statistic of the velocity fields from different channel cross-section are computed and analyzed.

The qualitative imagination: neoliberalism, ‘blind drift’ and alternative pathways

ABSTRACTIn this paper, we argue that the non-positivist origins that provided the impetus for the qualitative imagination over the past half century in educational research has undergone subtle, but nevertheless profound change and transformation as neoliberal forms of governmentality have increasingly colonised social and educational research. We examine contemporary responses and challenges to this process from within and outside the academy. It is our contention that unless educational researchers critically engage with these new methodologies, particularly as they are generated by and through social movements, qualitative research is likely to become subject to what CW Mills (Mills) referred to as ‘blind drift'.

Blind compensation of interchannel sampling frequency mismatch for ad hoc microphone array based on maximum likelihood estimation

In this paper, we propose a novel method for the blind compensation of drift for the asynchronous recording of an ad hoc microphone array. Digital signals simultaneously observed by different recording devices have drift of the time differences between the observation channels because of the sampling frequency mismatch among the devices. On the basis of a model in which the time difference is constant within each short time frame but varies in proportion to the central time of the frame, the effect of the sampling frequency mismatch can be compensated in the short-time Fourier transform (STFT) domain by a linear phase shift. By assuming that the sources are motionless and have stationary amplitudes, the observation is regarded as being stationary when drift does not occur. Thus, we formulate a likelihood to evaluate the stationarity in the STFT domain to evaluate the compensation of drift. The maximum likelihood estimation is obtained effectively by a golden section search. Using the estimated parameters, we compensate the drift by STFT analysis with a noninteger frame shift. The effectiveness of the proposed blind drift compensation method is evaluated in an experiment in which artificial drift is generated.

Study on the Flow Numerical Simulation of Jet Ventilation in Multi Tunnel Excavation

Pressed ventilation in heading face is actually turbulent jet ventilation. In the blind drift, the air ducts are usually laid on one side of the drifting tunnel forming the wall-attached jet along the side of the tunnel and in order to dilute and pour out harmful gas and dust, and create an backflow at the same time, the airflow of the ventilation jet must reach at the head of the tunnel. Therefore, the forced ventilation in heading face is actually restrained wall attached jet ventilation in confined space.

Overdetermination, Totality, and Institutions: A Genealogy of a Marxist Institutionalist Economics

The question of whether economics has a deep theoretical structure or basic methodology is an one. Certainly, institutionalists have eschewed and been critical of those theoretical approaches that seek to understand history as the unfolding of some fundamental essence or laws of motion, as do classical Marxist theories of historical materialism. Likewise, institutionalism, at least old institutionalism, has avoided the reductive tendencies of neoclassical economics to ground its theoretical arguments in the social atom of homo economicus.1 Instead, institutionalist economics has employed such fundamental ideas as Veblen's notion of blind drift and the dynamic and contingent concept of as a fundamental constituent of economic life. Moreover, institutionalists reject the idea of history as an evolutionary and teleological process and instead embrace the idea that change is non-progressive in the sense of not tending toward a pregiven telos. Finally, institutionalists emphasize the need to analyze concrete situations as the outcome of unique configurations of institutions, rather than to seek general laws of social or economic rationality. One could argue that how one conceives the relationship between the individual and society is the most fundamental decision of any social theory. This decision not only structures the manner in which theories apprehend the relationship between theory and the world (the epistemological issue), but also the ways in which the basic elements of a theory are causally related (the methodological issue). In economics, neoclassical economics is perhaps the best example of a theoretical approach that is based on what I will describe briefly below as the Cartesian totality, where parts are given independent to and prior to the social whole. Neo-Ricardian economic theory and some parts of Marxian theory, especially that approach now

Blind Drift and the Rightist State

The erosion of the golden age of American capitalism seems to have coincided with the ascendancy of rightist ideology and conservative economic policy. As the nation moved further into the stagnant era, government policy acquired an increasingly rightist tone. I Indeed, the shift to the right has been so dramatic that, in hindsight, the policies of the late 1970s and early 1980s (the passage of Proposition 13 in 1978, the Federal Reserve's move toward monetarism in 1979, and the implementation of Ronald Reagan's voodoo economics in 1981) seem tame when compared to the antistatist zeal with which rightist politicians endorsed the Contract with America in 1994 and shut down the federal government in 1995.2 A common interpretation of these events claims that the escalation of a rightist political economy, beginning in the late 1970s, was the result of the decline in economic conditions. One version of this idea has been offered by Samuel Bowles, David Gordon, and Thomas Weisskopf [1989]. They have argued that government moved toward a conservative economic policy in an effort to reverse the decline in relative economic power that capitalists began to experience toward the end of the golden age. The social structure of accumulation that had been put into place in the post-World War II era atrophied in the late 1960s and early 1970s [see Gordon, Edwards, and Reich 1982]. Core sector firms experienced this in the form of declining market power, rising unit cost, and declining rates of profit. In an attempt to restore capitalist power, conservative politicians moved toward dismantling government programs perceived as responsible for the decline in profitability. Thus, from this perspective, the conservative economic policy of the stagnant era reflects the political intentions of a capitalist class seeking to restore its economic power.

Evolutionary Economics and Cultural Hermeneutics: Veblen, Cultural Relativism, and Blind Drift

Evolutionary Economics and Cultural Hermeneutics: Veblen, Cultural Relativism, and Blind Drift

Beyond Eurocentrism and Multiculturalism

Previous articleNext article No AccessBeyond Eurocentrism and MulticulturalismCornel West and Bill BrownCornel West Search for more articles by this author and Bill Brown Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by Modern Philology Volume 90, Number S1May, 1993Supplement Article DOIhttps://doi.org/10.1086/392129 Views: 56Total views on this site Citations: 11Citations are reported from Crossref Copyright 1993 The University of ChicagoPDF download Crossref reports the following articles citing this article:Jana S. Rošker Intercultural Methodology in Sinology: Transculturality, Textual Criticism and Discursive Translations, AUC PHILOLOGICA 2021, no.33 (Feb 2022): 135–151.https://doi.org/10.14712/24646830.2022.7Arjun Tremblay The Multiculturalism Research Programme: Established and Emerging Concerns, (Dec 2018): 15–53.https://doi.org/10.1007/978-3-030-02299-0_2Alfdaniels Mabingo Integrating emerging technologies in teaching Ugandan traditional dances in K‐12 schools in New York City, The Curriculum Journal 26, no.22 (Apr 2015): 313–334.https://doi.org/10.1080/09585176.2015.1035734Hyuk-Rae Kim, Ingyu Oh Foreigners Cometh! Paths to Multiculturalism in Japan, Korea and Taiwan, Asian and Pacific Migration Journal 21, no.11 (Mar 2012): 105–133.https://doi.org/10.1177/011719681202100105Ojeya Cruz Banks Critical Postcolonial Dance Pedagogy: The Relevance of West African Dance Education in the United States, Anthropology & Education Quarterly 41, no.11 (Apr 2010): 18–34.https://doi.org/10.1111/j.1548-1492.2010.01065.xOlivia Gude Aesthetics Making Meaning, Studies in Art Education 50, no.11 (Nov 2015): 98–103.https://doi.org/10.1080/00393541.2008.11518758Barbara Schneider Uncommon Ground: Narcissistic Reading and Material Racism, Pedagogy 5, no.22 (Apr 2005): 195–212.https://doi.org/10.1215/15314200-5-2-195Beverly J. Vandiver, Peony E. Fhagen-Smith, Kevin O. Cokley, William E. Cross, Frank C. Worrell Cross's Nigrescence Model: From Theory to Scale to Theory, Journal of Multicultural Counseling and Development 29, no.33 (Dec 2011): 174–200.https://doi.org/10.1002/j.2161-1912.2001.tb00516.xTalmadge C. Guy Culture as Context for Adult Education: The Need for Culturally Relevant Adult Education, New Directions for Adult and Continuing Education 1999, no.8282 (Dec 2002): 5–18.https://doi.org/10.1002/ace.8201Carl D. Glickman Revolution, Education, and the Practice of Democracy, The Educational Forum 63, no.11 (Mar 1999): 16–22.https://doi.org/10.1080/00131729808984382Ann Jennings, William Waller Evolutionary Economics and Cultural Hermeneutics: Veblen, Cultural Relativism, and Blind Drift, Journal of Economic Issues 28, no.44 (Jan 2016): 997–1030.https://doi.org/10.1080/00213624.1994.11505610